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 # Whether to include project list on the gitweb front page; 0 means yes,
 156 # 1 means no list but show tag cloud if enabled (all projects still need
 157 # to be scanned), 2 means no list and no tag cloud (very fast)
 158 our $frontpage_no_project_list = 0;
 159
 160 # information about snapshot formats that gitweb is capable of serving
 161 our %known_snapshot_formats = (
 162         # name => {
 163         #       'display' => display name,
 164         #       'type' => mime type,
 165         #       'suffix' => filename suffix,
 166         #       'format' => --format for git-archive,
 167         #       'compressor' => [compressor command and arguments]
 168         #                       (array reference, optional)
 169         #       'disabled' => boolean (optional)}
 170         #
 171         'tgz' => {
 172                 'display' => 'tar.gz',
 173                 'type' => 'application/x-gzip',
 174                 'suffix' => '.tar.gz',
 175                 'format' => 'tar',
 176                 'compressor' => ['gzip']},
 177
 178         'tbz2' => {
 179                 'display' => 'tar.bz2',
 180                 'type' => 'application/x-bzip2',
 181                 'suffix' => '.tar.bz2',
 182                 'format' => 'tar',
 183                 'compressor' => ['bzip2']},
 184
 185         'txz' => {
 186                 'display' => 'tar.xz',
 187                 'type' => 'application/x-xz',
 188                 'suffix' => '.tar.xz',
 189                 'format' => 'tar',
 190                 'compressor' => ['xz'],
 191                 'disabled' => 1},
 192
 193         'zip' => {
 194                 'display' => 'zip',
 195                 'type' => 'application/x-zip',
 196                 'suffix' => '.zip',
 197                 'format' => 'zip'},
 198 );
 199
 200 # Aliases so we understand old gitweb.snapshot values in repository
 201 # configuration.
 202 our %known_snapshot_format_aliases = (
 203         'gzip'  => 'tgz',
 204         'bzip2' => 'tbz2',
 205         'xz'    => 'txz',
 206
 207         # backward compatibility: legacy gitweb config support
 208         'x-gzip' => undef, 'gz' => undef,
 209         'x-bzip2' => undef, 'bz2' => undef,
 210         'x-zip' => undef, '' => undef,
 211 );
 212
 213 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 214 # are changed, it may be appropriate to change these values too via
 215 # $GITWEB_CONFIG.
 216 our %avatar_size = (
 217         'default' => 16,
 218         'double'  => 32
 219 );
 220
 221 # You define site-wide feature defaults here; override them with
 222 # $GITWEB_CONFIG as necessary.
 223 our %feature = (
 224         # feature => {
 225         #       'sub' => feature-sub (subroutine),
 226         #       'override' => allow-override (boolean),
 227         #       'default' => [ default options...] (array reference)}
 228         #
 229         # if feature is overridable (it means that allow-override has true value),
 230         # then feature-sub will be called with default options as parameters;
 231         # return value of feature-sub indicates if to enable specified feature
 232         #
 233         # if there is no 'sub' key (no feature-sub), then feature cannot be
 234         # overriden
 235         #
 236         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 237         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 238         # is enabled
 239
 240         # Enable the 'blame' blob view, showing the last commit that modified
 241         # each line in the file. This can be very CPU-intensive.
 242
 243         # To enable system wide have in $GITWEB_CONFIG
 244         # $feature{'blame'}{'default'} = [1];
 245         # To have project specific config enable override in $GITWEB_CONFIG
 246         # $feature{'blame'}{'override'} = 1;
 247         # and in project config gitweb.blame = 0|1;
 248         'blame' => {
 249                 'sub' => sub { feature_bool('blame', @_) },
 250                 'override' => 0,
 251                 'default' => [0]},
 252
 253         # Enable the 'snapshot' link, providing a compressed archive of any
 254         # tree. This can potentially generate high traffic if you have large
 255         # project.
 256
 257         # Value is a list of formats defined in %known_snapshot_formats that
 258         # you wish to offer.
 259         # To disable system wide have in $GITWEB_CONFIG
 260         # $feature{'snapshot'}{'default'} = [];
 261         # To have project specific config enable override in $GITWEB_CONFIG
 262         # $feature{'snapshot'}{'override'} = 1;
 263         # and in project config, a comma-separated list of formats or "none"
 264         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 265         'snapshot' => {
 266                 'sub' => \&feature_snapshot,
 267                 'override' => 0,
 268                 'default' => ['tgz']},
 269
 270         # Enable text search, which will list the commits which match author,
 271         # committer or commit text to a given string.  Enabled by default.
 272         # Project specific override is not supported.
 273         'search' => {
 274                 'override' => 0,
 275                 'default' => [1]},
 276
 277         # Enable grep search, which will list the files in currently selected
 278         # tree containing the given string. Enabled by default. This can be
 279         # potentially CPU-intensive, of course.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'grep'}{'default'} = [1];
 283         # To have project specific config enable override in $GITWEB_CONFIG
 284         # $feature{'grep'}{'override'} = 1;
 285         # and in project config gitweb.grep = 0|1;
 286         'grep' => {
 287                 'sub' => sub { feature_bool('grep', @_) },
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable the pickaxe search, which will list the commits that modified
 292         # a given string in a file. This can be practical and quite faster
 293         # alternative to 'blame', but still potentially CPU-intensive.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'pickaxe'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'pickaxe'}{'override'} = 1;
 299         # and in project config gitweb.pickaxe = 0|1;
 300         'pickaxe' => {
 301                 'sub' => sub { feature_bool('pickaxe', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable showing size of blobs in a 'tree' view, in a separate
 306         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 307
 308         # To disable system wide have in $GITWEB_CONFIG
 309         # $feature{'show-sizes'}{'default'} = [0];
 310         # To have project specific config enable override in $GITWEB_CONFIG
 311         # $feature{'show-sizes'}{'override'} = 1;
 312         # and in project config gitweb.showsizes = 0|1;
 313         'show-sizes' => {
 314                 'sub' => sub { feature_bool('showsizes', @_) },
 315                 'override' => 0,
 316                 'default' => [1]},
 317
 318         # Make gitweb use an alternative format of the URLs which can be
 319         # more readable and natural-looking: project name is embedded
 320         # directly in the path and the query string contains other
 321         # auxiliary information. All gitweb installations recognize
 322         # URL in either format; this configures in which formats gitweb
 323         # generates links.
 324
 325         # To enable system wide have in $GITWEB_CONFIG
 326         # $feature{'pathinfo'}{'default'} = [1];
 327         # Project specific override is not supported.
 328
 329         # Note that you will need to change the default location of CSS,
 330         # favicon, logo and possibly other files to an absolute URL. Also,
 331         # if gitweb.cgi serves as your indexfile, you will need to force
 332         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 333         'pathinfo' => {
 334                 'override' => 0,
 335                 'default' => [0]},
 336
 337         # Make gitweb consider projects in project root subdirectories
 338         # to be forks of existing projects. Given project $projname.git,
 339         # projects matching $projname/*.git will not be shown in the main
 340         # projects list, instead a '+' mark will be added to $projname
 341         # there and a 'forks' view will be enabled for the project, listing
 342         # all the forks. If project list is taken from a file, forks have
 343         # to be listed after the main project.
 344
 345         # To enable system wide have in $GITWEB_CONFIG
 346         # $feature{'forks'}{'default'} = [1];
 347         # Project specific override is not supported.
 348         'forks' => {
 349                 'override' => 0,
 350                 'default' => [0]},
 351
 352         # Insert custom links to the action bar of all project pages.
 353         # This enables you mainly to link to third-party scripts integrating
 354         # into gitweb; e.g. git-browser for graphical history representation
 355         # or custom web-based repository administration interface.
 356
 357         # The 'default' value consists of a list of triplets in the form
 358         # (label, link, position) where position is the label after which
 359         # to insert the link and link is a format string where %n expands
 360         # to the project name, %f to the project path within the filesystem,
 361         # %h to the current hash (h gitweb parameter) and %b to the current
 362         # hash base (hb gitweb parameter); %% expands to %.
 363
 364         # To enable system wide have in $GITWEB_CONFIG e.g.
 365         # $feature{'actions'}{'default'} = [('graphiclog',
 366         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 367         # Project specific override is not supported.
 368         'actions' => {
 369                 'override' => 0,
 370                 'default' => []},
 371
 372         # Allow gitweb scan project content tags described in ctags/
 373         # of project repository, and display the popular Web 2.0-ish
 374         # "tag cloud" near the project list. Note that this is something
 375         # COMPLETELY different from the normal Git tags.
 376
 377         # gitweb by itself can show existing tags, but it does not handle
 378         # tagging itself; you need an external application for that.
 379         # For an example script, check Girocco's cgi/tagproj.cgi.
 380         # You may want to install the HTML::TagCloud Perl module to get
 381         # a pretty tag cloud instead of just a list of tags.
 382
 383         # To enable system wide have in $GITWEB_CONFIG
 384         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 385         # Project specific override is not supported.
 386         'ctags' => {
 387                 'override' => 0,
 388                 'default' => [0]},
 389
 390         # The maximum number of patches in a patchset generated in patch
 391         # view. Set this to 0 or undef to disable patch view, or to a
 392         # negative number to remove any limit.
 393
 394         # To disable system wide have in $GITWEB_CONFIG
 395         # $feature{'patches'}{'default'} = [0];
 396         # To have project specific config enable override in $GITWEB_CONFIG
 397         # $feature{'patches'}{'override'} = 1;
 398         # and in project config gitweb.patches = 0|n;
 399         # where n is the maximum number of patches allowed in a patchset.
 400         'patches' => {
 401                 'sub' => \&feature_patches,
 402                 'override' => 0,
 403                 'default' => [16]},
 404
 405         # Avatar support. When this feature is enabled, views such as
 406         # shortlog or commit will display an avatar associated with
 407         # the email of the committer(s) and/or author(s).
 408
 409         # Currently available providers are gravatar and picon.
 410         # If an unknown provider is specified, the feature is disabled.
 411
 412         # Gravatar depends on Digest::MD5.
 413         # Picon currently relies on the indiana.edu database.
 414
 415         # To enable system wide have in $GITWEB_CONFIG
 416         # $feature{'avatar'}{'default'} = ['<provider>'];
 417         # where <provider> is either gravatar or picon.
 418         # To have project specific config enable override in $GITWEB_CONFIG
 419         # $feature{'avatar'}{'override'} = 1;
 420         # and in project config gitweb.avatar = <provider>;
 421         'avatar' => {
 422                 'sub' => \&feature_avatar,
 423                 'override' => 0,
 424                 'default' => ['']},
 425 );
 426
 427 sub gitweb_get_feature {
 428         my ($name) = @_;
 429         return unless exists $feature{$name};
 430         my ($sub, $override, @defaults) = (
 431                 $feature{$name}{'sub'},
 432                 $feature{$name}{'override'},
 433                 @{$feature{$name}{'default'}});
 434         if (!$override) { return @defaults; }
 435         if (!defined $sub) {
 436                 warn "feature $name is not overridable";
 437                 return @defaults;
 438         }
 439         return $sub->(@defaults);
 440 }
 441
 442 # A wrapper to check if a given feature is enabled.
 443 # With this, you can say
 444 #
 445 #   my $bool_feat = gitweb_check_feature('bool_feat');
 446 #   gitweb_check_feature('bool_feat') or somecode;
 447 #
 448 # instead of
 449 #
 450 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 451 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 452 #
 453 sub gitweb_check_feature {
 454         return (gitweb_get_feature(@_))[0];
 455 }
 456
 457
 458 sub feature_bool {
 459         my $key = shift;
 460         my ($val) = git_get_project_config($key, '--bool');
 461
 462         if (!defined $val) {
 463                 return ($_[0]);
 464         } elsif ($val eq 'true') {
 465                 return (1);
 466         } elsif ($val eq 'false') {
 467                 return (0);
 468         }
 469 }
 470
 471 sub feature_snapshot {
 472         my (@fmts) = @_;
 473
 474         my ($val) = git_get_project_config('snapshot');
 475
 476         if ($val) {
 477                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 478         }
 479
 480         return @fmts;
 481 }
 482
 483 sub feature_patches {
 484         my @val = (git_get_project_config('patches', '--int'));
 485
 486         if (@val) {
 487                 return @val;
 488         }
 489
 490         return ($_[0]);
 491 }
 492
 493 sub feature_avatar {
 494         my @val = (git_get_project_config('avatar'));
 495
 496         return @val ? @val : @_;
 497 }
 498
 499 # checking HEAD file with -e is fragile if the repository was
 500 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 501 # and then pruned.
 502 sub check_head_link {
 503         my ($dir) = @_;
 504         my $headfile = "$dir/HEAD";
 505         return ((-e $headfile) ||
 506                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 507 }
 508
 509 sub check_export_ok {
 510         my ($dir) = @_;
 511         return (check_head_link($dir) &&
 512                 (!$export_ok || -e "$dir/$export_ok") &&
 513                 (!$export_auth_hook || $export_auth_hook->($dir)));
 514 }
 515
 516 # process alternate names for backward compatibility
 517 # filter out unsupported (unknown) snapshot formats
 518 sub filter_snapshot_fmts {
 519         my @fmts = @_;
 520
 521         @fmts = map {
 522                 exists $known_snapshot_format_aliases{$_} ?
 523                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 524         @fmts = grep {
 525                 exists $known_snapshot_formats{$_} &&
 526                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 527 }
 528
 529 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 530 if (-e $GITWEB_CONFIG) {
 531         do $GITWEB_CONFIG;
 532 } else {
 533         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 534         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 535 }
 536
 537 # version of the core git binary
 538 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 539
 540 $projects_list ||= $projectroot;
 541
 542 # ======================================================================
 543 # input validation and dispatch
 544
 545 # input parameters can be collected from a variety of sources (presently, CGI
 546 # and PATH_INFO), so we define an %input_params hash that collects them all
 547 # together during validation: this allows subsequent uses (e.g. href()) to be
 548 # agnostic of the parameter origin
 549
 550 our %input_params = ();
 551
 552 # input parameters are stored with the long parameter name as key. This will
 553 # also be used in the href subroutine to convert parameters to their CGI
 554 # equivalent, and since the href() usage is the most frequent one, we store
 555 # the name -> CGI key mapping here, instead of the reverse.
 556 #
 557 # XXX: Warning: If you touch this, check the search form for updating,
 558 # too.
 559
 560 our @cgi_param_mapping = (
 561         project => "p",
 562         action => "a",
 563         file_name => "f",
 564         file_parent => "fp",
 565         hash => "h",
 566         hash_parent => "hp",
 567         hash_base => "hb",
 568         hash_parent_base => "hpb",
 569         page => "pg",
 570         order => "o",
 571         searchtext => "s",
 572         searchtype => "st",
 573         snapshot_format => "sf",
 574         extra_options => "opt",
 575         search_use_regexp => "sr",
 576 );
 577 our %cgi_param_mapping = @cgi_param_mapping;
 578
 579 # we will also need to know the possible actions, for validation
 580 our %actions = (
 581         "blame" => \&git_blame,
 582         "blobdiff" => \&git_blobdiff,
 583         "blobdiff_plain" => \&git_blobdiff_plain,
 584         "blob" => \&git_blob,
 585         "blob_plain" => \&git_blob_plain,
 586         "commitdiff" => \&git_commitdiff,
 587         "commitdiff_plain" => \&git_commitdiff_plain,
 588         "commit" => \&git_commit,
 589         "forks" => \&git_forks,
 590         "heads" => \&git_heads,
 591         "history" => \&git_history,
 592         "log" => \&git_log,
 593         "patch" => \&git_patch,
 594         "patches" => \&git_patches,
 595         "rss" => \&git_rss,
 596         "atom" => \&git_atom,
 597         "search" => \&git_search,
 598         "search_help" => \&git_search_help,
 599         "shortlog" => \&git_shortlog,
 600         "summary" => \&git_summary,
 601         "tag" => \&git_tag,
 602         "tags" => \&git_tags,
 603         "tree" => \&git_tree,
 604         "snapshot" => \&git_snapshot,
 605         "object" => \&git_object,
 606         # those below don't need $project
 607         "opml" => \&git_opml,
 608         "frontpage" => \&git_frontpage,
 609         "project_list" => \&git_project_list,
 610         "project_index" => \&git_project_index,
 611 );
 612
 613 # finally, we have the hash of allowed extra_options for the commands that
 614 # allow them
 615 our %allowed_options = (
 616         "--no-merges" => [ qw(rss atom log shortlog history) ],
 617 );
 618
 619 # fill %input_params with the CGI parameters. All values except for 'opt'
 620 # should be single values, but opt can be an array. We should probably
 621 # build an array of parameters that can be multi-valued, but since for the time
 622 # being it's only this one, we just single it out
 623 while (my ($name, $symbol) = each %cgi_param_mapping) {
 624         if ($symbol eq 'opt') {
 625                 $input_params{$name} = [ $cgi->param($symbol) ];
 626         } else {
 627                 $input_params{$name} = $cgi->param($symbol);
 628         }
 629 }
 630
 631 # now read PATH_INFO and update the parameter list for missing parameters
 632 sub evaluate_path_info {
 633         return if defined $input_params{'project'};
 634         return if !$path_info;
 635         $path_info =~ s,^/+,,;
 636         return if !$path_info;
 637
 638         # find which part of PATH_INFO is project
 639         my $project = $path_info;
 640         $project =~ s,/+$,,;
 641         while ($project && !check_head_link("$projectroot/$project")) {
 642                 $project =~ s,/*[^/]*$,,;
 643         }
 644         return unless $project;
 645         $input_params{'project'} = $project;
 646
 647         # do not change any parameters if an action is given using the query string
 648         return if $input_params{'action'};
 649         $path_info =~ s,^\Q$project\E/*,,;
 650
 651         # next, check if we have an action
 652         my $action = $path_info;
 653         $action =~ s,/.*$,,;
 654         if (exists $actions{$action}) {
 655                 $path_info =~ s,^$action/*,,;
 656                 $input_params{'action'} = $action;
 657         }
 658
 659         # list of actions that want hash_base instead of hash, but can have no
 660         # pathname (f) parameter
 661         my @wants_base = (
 662                 'tree',
 663                 'history',
 664         );
 665
 666         # we want to catch
 667         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 668         my ($parentrefname, $parentpathname, $refname, $pathname) =
 669                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 670
 671         # first, analyze the 'current' part
 672         if (defined $pathname) {
 673                 # we got "branch:filename" or "branch:dir/"
 674                 # we could use git_get_type(branch:pathname), but:
 675                 # - it needs $git_dir
 676                 # - it does a git() call
 677                 # - the convention of terminating directories with a slash
 678                 #   makes it superfluous
 679                 # - embedding the action in the PATH_INFO would make it even
 680                 #   more superfluous
 681                 $pathname =~ s,^/+,,;
 682                 if (!$pathname || substr($pathname, -1) eq "/") {
 683                         $input_params{'action'} ||= "tree";
 684                         $pathname =~ s,/$,,;
 685                 } else {
 686                         # the default action depends on whether we had parent info
 687                         # or not
 688                         if ($parentrefname) {
 689                                 $input_params{'action'} ||= "blobdiff_plain";
 690                         } else {
 691                                 $input_params{'action'} ||= "blob_plain";
 692                         }
 693                 }
 694                 $input_params{'hash_base'} ||= $refname;
 695                 $input_params{'file_name'} ||= $pathname;
 696         } elsif (defined $refname) {
 697                 # we got "branch". In this case we have to choose if we have to
 698                 # set hash or hash_base.
 699                 #
 700                 # Most of the actions without a pathname only want hash to be
 701                 # set, except for the ones specified in @wants_base that want
 702                 # hash_base instead. It should also be noted that hand-crafted
 703                 # links having 'history' as an action and no pathname or hash
 704                 # set will fail, but that happens regardless of PATH_INFO.
 705                 $input_params{'action'} ||= "shortlog";
 706                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 707                         $input_params{'hash_base'} ||= $refname;
 708                 } else {
 709                         $input_params{'hash'} ||= $refname;
 710                 }
 711         }
 712
 713         # next, handle the 'parent' part, if present
 714         if (defined $parentrefname) {
 715                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 716                 # someproject/blobdiff/oldrev..newrev:/filename
 717                 if ($parentpathname) {
 718                         $parentpathname =~ s,^/+,,;
 719                         $parentpathname =~ s,/$,,;
 720                         $input_params{'file_parent'} ||= $parentpathname;
 721                 } else {
 722                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 723                 }
 724                 # we assume that hash_parent_base is wanted if a path was specified,
 725                 # or if the action wants hash_base instead of hash
 726                 if (defined $input_params{'file_parent'} ||
 727                         grep { $_ eq $input_params{'action'} } @wants_base) {
 728                         $input_params{'hash_parent_base'} ||= $parentrefname;
 729                 } else {
 730                         $input_params{'hash_parent'} ||= $parentrefname;
 731                 }
 732         }
 733
 734         # for the snapshot action, we allow URLs in the form
 735         # $project/snapshot/$hash.ext
 736         # where .ext determines the snapshot and gets removed from the
 737         # passed $refname to provide the $hash.
 738         #
 739         # To be able to tell that $refname includes the format extension, we
 740         # require the following two conditions to be satisfied:
 741         # - the hash input parameter MUST have been set from the $refname part
 742         #   of the URL (i.e. they must be equal)
 743         # - the snapshot format MUST NOT have been defined already (e.g. from
 744         #   CGI parameter sf)
 745         # It's also useless to try any matching unless $refname has a dot,
 746         # so we check for that too
 747         if (defined $input_params{'action'} &&
 748                 $input_params{'action'} eq 'snapshot' &&
 749                 defined $refname && index($refname, '.') != -1 &&
 750                 $refname eq $input_params{'hash'} &&
 751                 !defined $input_params{'snapshot_format'}) {
 752                 # We loop over the known snapshot formats, checking for
 753                 # extensions. Allowed extensions are both the defined suffix
 754                 # (which includes the initial dot already) and the snapshot
 755                 # format key itself, with a prepended dot
 756                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 757                         my $hash = $refname;
 758                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 759                                 next;
 760                         }
 761                         my $sfx = $1;
 762                         # a valid suffix was found, so set the snapshot format
 763                         # and reset the hash parameter
 764                         $input_params{'snapshot_format'} = $fmt;
 765                         $input_params{'hash'} = $hash;
 766                         # we also set the format suffix to the one requested
 767                         # in the URL: this way a request for e.g. .tgz returns
 768                         # a .tgz instead of a .tar.gz
 769                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 770                         last;
 771                 }
 772         }
 773 }
 774 evaluate_path_info();
 775
 776 our $action = $input_params{'action'};
 777 if (defined $action) {
 778         if (!validate_action($action)) {
 779                 die_error(400, "Invalid action parameter");
 780         }
 781 }
 782
 783 # parameters which are pathnames
 784 our $project = $input_params{'project'};
 785 if (defined $project) {
 786         if (!validate_project($project)) {
 787                 undef $project;
 788                 die_error(404, "No such project");
 789         }
 790 }
 791
 792 our $file_name = $input_params{'file_name'};
 793 if (defined $file_name) {
 794         if (!validate_pathname($file_name)) {
 795                 die_error(400, "Invalid file parameter");
 796         }
 797 }
 798
 799 our $file_parent = $input_params{'file_parent'};
 800 if (defined $file_parent) {
 801         if (!validate_pathname($file_parent)) {
 802                 die_error(400, "Invalid file parent parameter");
 803         }
 804 }
 805
 806 # parameters which are refnames
 807 our $hash = $input_params{'hash'};
 808 if (defined $hash) {
 809         if (!validate_refname($hash)) {
 810                 die_error(400, "Invalid hash parameter");
 811         }
 812 }
 813
 814 our $hash_parent = $input_params{'hash_parent'};
 815 if (defined $hash_parent) {
 816         if (!validate_refname($hash_parent)) {
 817                 die_error(400, "Invalid hash parent parameter");
 818         }
 819 }
 820
 821 our $hash_base = $input_params{'hash_base'};
 822 if (defined $hash_base) {
 823         if (!validate_refname($hash_base)) {
 824                 die_error(400, "Invalid hash base parameter");
 825         }
 826 }
 827
 828 our @extra_options = @{$input_params{'extra_options'}};
 829 # @extra_options is always defined, since it can only be (currently) set from
 830 # CGI, and $cgi->param() returns the empty array in array context if the param
 831 # is not set
 832 foreach my $opt (@extra_options) {
 833         if (not exists $allowed_options{$opt}) {
 834                 die_error(400, "Invalid option parameter");
 835         }
 836         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 837                 die_error(400, "Invalid option parameter for this action");
 838         }
 839 }
 840
 841 our $hash_parent_base = $input_params{'hash_parent_base'};
 842 if (defined $hash_parent_base) {
 843         if (!validate_refname($hash_parent_base)) {
 844                 die_error(400, "Invalid hash parent base parameter");
 845         }
 846 }
 847
 848 # other parameters
 849 our $page = $input_params{'page'};
 850 if (defined $page) {
 851         if ($page =~ m/[^0-9]/) {
 852                 die_error(400, "Invalid page parameter");
 853         }
 854 }
 855
 856 our $searchtype = $input_params{'searchtype'};
 857 if (defined $searchtype) {
 858         if ($searchtype =~ m/[^a-z]/) {
 859                 die_error(400, "Invalid searchtype parameter");
 860         }
 861 }
 862
 863 our $search_use_regexp = $input_params{'search_use_regexp'};
 864
 865 our $searchtext = $input_params{'searchtext'};
 866 our $search_regexp;
 867 if (defined $searchtext) {
 868         if (length($searchtext) < 2) {
 869                 die_error(403, "At least two characters are required for search parameter");
 870         }
 871         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 872 }
 873
 874 # path to the current git repository
 875 our $git_dir;
 876 $git_dir = "$projectroot/$project" if $project;
 877
 878 # list of supported snapshot formats
 879 our @snapshot_fmts = gitweb_get_feature('snapshot');
 880 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 881
 882 # check that the avatar feature is set to a known provider name,
 883 # and for each provider check if the dependencies are satisfied.
 884 # if the provider name is invalid or the dependencies are not met,
 885 # reset $git_avatar to the empty string.
 886 our ($git_avatar) = gitweb_get_feature('avatar');
 887 if ($git_avatar eq 'gravatar') {
 888         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 889 } elsif ($git_avatar eq 'picon') {
 890         # no dependencies
 891 } else {
 892         $git_avatar = '';
 893 }
 894
 895 # dispatch
 896 if (!defined $action) {
 897         if (defined $hash) {
 898                 $action = git_get_type($hash);
 899         } elsif (defined $hash_base && defined $file_name) {
 900                 $action = git_get_type("$hash_base:$file_name");
 901         } elsif (defined $project) {
 902                 $action = 'summary';
 903         } else {
 904                 $action = 'frontpage';
 905         }
 906 }
 907 if (!defined($actions{$action})) {
 908         die_error(400, "Unknown action");
 909 }
 910 if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
 911     !$project) {
 912         die_error(400, "Project needed");
 913 }
 914 $actions{$action}->();
 915 exit;
 916
 917 ## ======================================================================
 918 ## action links
 919
 920 sub href {
 921         my %params = @_;
 922         # default is to use -absolute url() i.e. $my_uri
 923         my $href = $params{-full} ? $my_url : $my_uri;
 924
 925         $params{'project'} = $project unless exists $params{'project'};
 926
 927         if ($params{-replay}) {
 928                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 929                         if (!exists $params{$name}) {
 930                                 $params{$name} = $input_params{$name};
 931                         }
 932                 }
 933         }
 934
 935         my $use_pathinfo = gitweb_check_feature('pathinfo');
 936         if ($use_pathinfo and defined $params{'project'}) {
 937                 # try to put as many parameters as possible in PATH_INFO:
 938                 #   - project name
 939                 #   - action
 940                 #   - hash_parent or hash_parent_base:/file_parent
 941                 #   - hash or hash_base:/filename
 942                 #   - the snapshot_format as an appropriate suffix
 943
 944                 # When the script is the root DirectoryIndex for the domain,
 945                 # $href here would be something like http://gitweb.example.com/
 946                 # Thus, we strip any trailing / from $href, to spare us double
 947                 # slashes in the final URL
 948                 $href =~ s,/$,,;
 949
 950                 # Then add the project name, if present
 951                 $href .= "/".esc_url($params{'project'});
 952                 delete $params{'project'};
 953
 954                 # since we destructively absorb parameters, we keep this
 955                 # boolean that remembers if we're handling a snapshot
 956                 my $is_snapshot = $params{'action'} eq 'snapshot';
 957
 958                 # Summary just uses the project path URL, any other action is
 959                 # added to the URL
 960                 if (defined $params{'action'}) {
 961                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 962                         delete $params{'action'};
 963                 }
 964
 965                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 966                 # stripping nonexistent or useless pieces
 967                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 968                         || $params{'hash_parent'} || $params{'hash'});
 969                 if (defined $params{'hash_base'}) {
 970                         if (defined $params{'hash_parent_base'}) {
 971                                 $href .= esc_url($params{'hash_parent_base'});
 972                                 # skip the file_parent if it's the same as the file_name
 973                                 if (defined $params{'file_parent'}) {
 974                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 975                                                 delete $params{'file_parent'};
 976                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 977                                                 $href .= ":/".esc_url($params{'file_parent'});
 978                                                 delete $params{'file_parent'};
 979                                         }
 980                                 }
 981                                 $href .= "..";
 982                                 delete $params{'hash_parent'};
 983                                 delete $params{'hash_parent_base'};
 984                         } elsif (defined $params{'hash_parent'}) {
 985                                 $href .= esc_url($params{'hash_parent'}). "..";
 986                                 delete $params{'hash_parent'};
 987                         }
 988
 989                         $href .= esc_url($params{'hash_base'});
 990                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 991                                 $href .= ":/".esc_url($params{'file_name'});
 992                                 delete $params{'file_name'};
 993                         }
 994                         delete $params{'hash'};
 995                         delete $params{'hash_base'};
 996                 } elsif (defined $params{'hash'}) {
 997                         $href .= esc_url($params{'hash'});
 998                         delete $params{'hash'};
 999                 }
1000
1001                 # If the action was a snapshot, we can absorb the
1002                 # snapshot_format parameter too
1003                 if ($is_snapshot) {
1004                         my $fmt = $params{'snapshot_format'};
1005                         # snapshot_format should always be defined when href()
1006                         # is called, but just in case some code forgets, we
1007                         # fall back to the default
1008                         $fmt ||= $snapshot_fmts[0];
1009                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1010                         delete $params{'snapshot_format'};
1011                 }
1012         }
1013
1014         # now encode the parameters explicitly
1015         my @result = ();
1016         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1017                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1018                 if (defined $params{$name}) {
1019                         if (ref($params{$name}) eq "ARRAY") {
1020                                 foreach my $par (@{$params{$name}}) {
1021                                         push @result, $symbol . "=" . esc_param($par);
1022                                 }
1023                         } else {
1024                                 push @result, $symbol . "=" . esc_param($params{$name});
1025                         }
1026                 }
1027         }
1028         $href .= "?" . join(';', @result) if scalar @result;
1029
1030         return $href;
1031 }
1032
1033
1034 ## ======================================================================
1035 ## validation, quoting/unquoting and escaping
1036
1037 sub validate_action {
1038         my $input = shift || return undef;
1039         return undef unless exists $actions{$input};
1040         return $input;
1041 }
1042
1043 sub validate_project {
1044         my $input = shift || return undef;
1045         if (!validate_pathname($input) ||
1046                 !(-d "$projectroot/$input") ||
1047                 !check_export_ok("$projectroot/$input") ||
1048                 ($strict_export && !project_in_list($input))) {
1049                 return undef;
1050         } else {
1051                 return $input;
1052         }
1053 }
1054
1055 sub validate_pathname {
1056         my $input = shift || return undef;
1057
1058         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1059         # at the beginning, at the end, and between slashes.
1060         # also this catches doubled slashes
1061         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1062                 return undef;
1063         }
1064         # no null characters
1065         if ($input =~ m!\0!) {
1066                 return undef;
1067         }
1068         return $input;
1069 }
1070
1071 sub validate_refname {
1072         my $input = shift || return undef;
1073
1074         # textual hashes are O.K.
1075         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1076                 return $input;
1077         }
1078         # it must be correct pathname
1079         $input = validate_pathname($input)
1080                 or return undef;
1081         # restrictions on ref name according to git-check-ref-format
1082         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1083                 return undef;
1084         }
1085         return $input;
1086 }
1087
1088 # decode sequences of octets in utf8 into Perl's internal form,
1089 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1090 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1091 sub to_utf8 {
1092         my $str = shift;
1093         if (utf8::valid($str)) {
1094                 utf8::decode($str);
1095                 return $str;
1096         } else {
1097                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1098         }
1099 }
1100
1101 # quote unsafe chars, but keep the slash, even when it's not
1102 # correct, but quoted slashes look too horrible in bookmarks
1103 sub esc_param {
1104         my $str = shift;
1105         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1106         $str =~ s/ /\+/g;
1107         return $str;
1108 }
1109
1110 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1111 sub esc_url {
1112         my $str = shift;
1113         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1114         $str =~ s/\+/%2B/g;
1115         $str =~ s/ /\+/g;
1116         return $str;
1117 }
1118
1119 # replace invalid utf8 character with SUBSTITUTION sequence
1120 sub esc_html {
1121         my $str = shift;
1122         my %opts = @_;
1123
1124         $str = to_utf8($str);
1125         $str = $cgi->escapeHTML($str);
1126         if ($opts{'-nbsp'}) {
1127                 $str =~ s/ /&nbsp;/g;
1128         }
1129         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1130         return $str;
1131 }
1132
1133 # quote control characters and escape filename to HTML
1134 sub esc_path {
1135         my $str = shift;
1136         my %opts = @_;
1137
1138         $str = to_utf8($str);
1139         $str = $cgi->escapeHTML($str);
1140         if ($opts{'-nbsp'}) {
1141                 $str =~ s/ /&nbsp;/g;
1142         }
1143         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1144         return $str;
1145 }
1146
1147 # Make control characters "printable", using character escape codes (CEC)
1148 sub quot_cec {
1149         my $cntrl = shift;
1150         my %opts = @_;
1151         my %es = ( # character escape codes, aka escape sequences
1152                 "\t" => '\t',   # tab            (HT)
1153                 "\n" => '\n',   # line feed      (LF)
1154                 "\r" => '\r',   # carrige return (CR)
1155                 "\f" => '\f',   # form feed      (FF)
1156                 "\b" => '\b',   # backspace      (BS)
1157                 "\a" => '\a',   # alarm (bell)   (BEL)
1158                 "\e" => '\e',   # escape         (ESC)
1159                 "\013" => '\v', # vertical tab   (VT)
1160                 "\000" => '\0', # nul character  (NUL)
1161         );
1162         my $chr = ( (exists $es{$cntrl})
1163                     ? $es{$cntrl}
1164                     : sprintf('\%2x', ord($cntrl)) );
1165         if ($opts{-nohtml}) {
1166                 return $chr;
1167         } else {
1168                 return "<span class=\"cntrl\">$chr</span>";
1169         }
1170 }
1171
1172 # Alternatively use unicode control pictures codepoints,
1173 # Unicode "printable representation" (PR)
1174 sub quot_upr {
1175         my $cntrl = shift;
1176         my %opts = @_;
1177
1178         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1179         if ($opts{-nohtml}) {
1180                 return $chr;
1181         } else {
1182                 return "<span class=\"cntrl\">$chr</span>";
1183         }
1184 }
1185
1186 # git may return quoted and escaped filenames
1187 sub unquote {
1188         my $str = shift;
1189
1190         sub unq {
1191                 my $seq = shift;
1192                 my %es = ( # character escape codes, aka escape sequences
1193                         't' => "\t",   # tab            (HT, TAB)
1194                         'n' => "\n",   # newline        (NL)
1195                         'r' => "\r",   # return         (CR)
1196                         'f' => "\f",   # form feed      (FF)
1197                         'b' => "\b",   # backspace      (BS)
1198                         'a' => "\a",   # alarm (bell)   (BEL)
1199                         'e' => "\e",   # escape         (ESC)
1200                         'v' => "\013", # vertical tab   (VT)
1201                 );
1202
1203                 if ($seq =~ m/^[0-7]{1,3}$/) {
1204                         # octal char sequence
1205                         return chr(oct($seq));
1206                 } elsif (exists $es{$seq}) {
1207                         # C escape sequence, aka character escape code
1208                         return $es{$seq};
1209                 }
1210                 # quoted ordinary character
1211                 return $seq;
1212         }
1213
1214         if ($str =~ m/^"(.*)"$/) {
1215                 # needs unquoting
1216                 $str = $1;
1217                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1218         }
1219         return $str;
1220 }
1221
1222 # escape tabs (convert tabs to spaces)
1223 sub untabify {
1224         my $line = shift;
1225
1226         while ((my $pos = index($line, "\t")) != -1) {
1227                 if (my $count = (8 - ($pos % 8))) {
1228                         my $spaces = ' ' x $count;
1229                         $line =~ s/\t/$spaces/;
1230                 }
1231         }
1232
1233         return $line;
1234 }
1235
1236 sub project_in_list {
1237         my $project = shift;
1238         my @list = git_get_projects_list();
1239         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1240 }
1241
1242 ## ----------------------------------------------------------------------
1243 ## HTML aware string manipulation
1244
1245 # Try to chop given string on a word boundary between position
1246 # $len and $len+$add_len. If there is no word boundary there,
1247 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1248 # (marking chopped part) would be longer than given string.
1249 sub chop_str {
1250         my $str = shift;
1251         my $len = shift;
1252         my $add_len = shift || 10;
1253         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1254
1255         # Make sure perl knows it is utf8 encoded so we don't
1256         # cut in the middle of a utf8 multibyte char.
1257         $str = to_utf8($str);
1258
1259         # allow only $len chars, but don't cut a word if it would fit in $add_len
1260         # if it doesn't fit, cut it if it's still longer than the dots we would add
1261         # remove chopped character entities entirely
1262
1263         # when chopping in the middle, distribute $len into left and right part
1264         # return early if chopping wouldn't make string shorter
1265         if ($where eq 'center') {
1266                 return $str if ($len + 5 >= length($str)); # filler is length 5
1267                 $len = int($len/2);
1268         } else {
1269                 return $str if ($len + 4 >= length($str)); # filler is length 4
1270         }
1271
1272         # regexps: ending and beginning with word part up to $add_len
1273         my $endre = qr/.{$len}\w{0,$add_len}/;
1274         my $begre = qr/\w{0,$add_len}.{$len}/;
1275
1276         if ($where eq 'left') {
1277                 $str =~ m/^(.*?)($begre)$/;
1278                 my ($lead, $body) = ($1, $2);
1279                 if (length($lead) > 4) {
1280                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1281                         $lead = " ...";
1282                 }
1283                 return "$lead$body";
1284
1285         } elsif ($where eq 'center') {
1286                 $str =~ m/^($endre)(.*)$/;
1287                 my ($left, $str)  = ($1, $2);
1288                 $str =~ m/^(.*?)($begre)$/;
1289                 my ($mid, $right) = ($1, $2);
1290                 if (length($mid) > 5) {
1291                         $left  =~ s/&[^;]*$//;
1292                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1293                         $mid = " ... ";
1294                 }
1295                 return "$left$mid$right";
1296
1297         } else {
1298                 $str =~ m/^($endre)(.*)$/;
1299                 my $body = $1;
1300                 my $tail = $2;
1301                 if (length($tail) > 4) {
1302                         $body =~ s/&[^;]*$//;
1303                         $tail = "... ";
1304                 }
1305                 return "$body$tail";
1306         }
1307 }
1308
1309 # takes the same arguments as chop_str, but also wraps a <span> around the
1310 # result with a title attribute if it does get chopped. Additionally, the
1311 # string is HTML-escaped.
1312 sub chop_and_escape_str {
1313         my ($str) = @_;
1314
1315         my $chopped = chop_str(@_);
1316         if ($chopped eq $str) {
1317                 return esc_html($chopped);
1318         } else {
1319                 $str =~ s/[[:cntrl:]]/?/g;
1320                 return $cgi->span({-title=>$str}, esc_html($chopped));
1321         }
1322 }
1323
1324 ## ----------------------------------------------------------------------
1325 ## functions returning short strings
1326
1327 # CSS class for given age value (in seconds)
1328 sub age_class {
1329         my $age = shift;
1330
1331         if (!defined $age) {
1332                 return "noage";
1333         } elsif ($age < 60*60*2) {
1334                 return "age0";
1335         } elsif ($age < 60*60*24*2) {
1336                 return "age1";
1337         } else {
1338                 return "age2";
1339         }
1340 }
1341
1342 # convert age in seconds to "nn units ago" string
1343 sub age_string {
1344         my $age = shift;
1345         my $age_str;
1346
1347         if ($age > 60*60*24*365*2) {
1348                 $age_str = (int $age/60/60/24/365);
1349                 $age_str .= " years ago";
1350         } elsif ($age > 60*60*24*(365/12)*2) {
1351                 $age_str = int $age/60/60/24/(365/12);
1352                 $age_str .= " months ago";
1353         } elsif ($age > 60*60*24*7*2) {
1354                 $age_str = int $age/60/60/24/7;
1355                 $age_str .= " weeks ago";
1356         } elsif ($age > 60*60*24*2) {
1357                 $age_str = int $age/60/60/24;
1358                 $age_str .= " days ago";
1359         } elsif ($age > 60*60*2) {
1360                 $age_str = int $age/60/60;
1361                 $age_str .= " hours ago";
1362         } elsif ($age > 60*2) {
1363                 $age_str = int $age/60;
1364                 $age_str .= " min ago";
1365         } elsif ($age > 2) {
1366                 $age_str = int $age;
1367                 $age_str .= " sec ago";
1368         } else {
1369                 $age_str .= " right now";
1370         }
1371         return $age_str;
1372 }
1373
1374 use constant {
1375         S_IFINVALID => 0030000,
1376         S_IFGITLINK => 0160000,
1377 };
1378
1379 # submodule/subproject, a commit object reference
1380 sub S_ISGITLINK {
1381         my $mode = shift;
1382
1383         return (($mode & S_IFMT) == S_IFGITLINK)
1384 }
1385
1386 # convert file mode in octal to symbolic file mode string
1387 sub mode_str {
1388         my $mode = oct shift;
1389
1390         if (S_ISGITLINK($mode)) {
1391                 return 'm---------';
1392         } elsif (S_ISDIR($mode & S_IFMT)) {
1393                 return 'drwxr-xr-x';
1394         } elsif (S_ISLNK($mode)) {
1395                 return 'lrwxrwxrwx';
1396         } elsif (S_ISREG($mode)) {
1397                 # git cares only about the executable bit
1398                 if ($mode & S_IXUSR) {
1399                         return '-rwxr-xr-x';
1400                 } else {
1401                         return '-rw-r--r--';
1402                 };
1403         } else {
1404                 return '----------';
1405         }
1406 }
1407
1408 # convert file mode in octal to file type string
1409 sub file_type {
1410         my $mode = shift;
1411
1412         if ($mode !~ m/^[0-7]+$/) {
1413                 return $mode;
1414         } else {
1415                 $mode = oct $mode;
1416         }
1417
1418         if (S_ISGITLINK($mode)) {
1419                 return "submodule";
1420         } elsif (S_ISDIR($mode & S_IFMT)) {
1421                 return "directory";
1422         } elsif (S_ISLNK($mode)) {
1423                 return "symlink";
1424         } elsif (S_ISREG($mode)) {
1425                 return "file";
1426         } else {
1427                 return "unknown";
1428         }
1429 }
1430
1431 # convert file mode in octal to file type description string
1432 sub file_type_long {
1433         my $mode = shift;
1434
1435         if ($mode !~ m/^[0-7]+$/) {
1436                 return $mode;
1437         } else {
1438                 $mode = oct $mode;
1439         }
1440
1441         if (S_ISGITLINK($mode)) {
1442                 return "submodule";
1443         } elsif (S_ISDIR($mode & S_IFMT)) {
1444                 return "directory";
1445         } elsif (S_ISLNK($mode)) {
1446                 return "symlink";
1447         } elsif (S_ISREG($mode)) {
1448                 if ($mode & S_IXUSR) {
1449                         return "executable";
1450                 } else {
1451                         return "file";
1452                 };
1453         } else {
1454                 return "unknown";
1455         }
1456 }
1457
1458
1459 ## ----------------------------------------------------------------------
1460 ## functions returning short HTML fragments, or transforming HTML fragments
1461 ## which don't belong to other sections
1462
1463 # format line of commit message.
1464 sub format_log_line_html {
1465         my $line = shift;
1466
1467         $line = esc_html($line, -nbsp=>1);
1468         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1469                 $cgi->a({-href => href(action=>"object", hash=>$1),
1470                                         -class => "text"}, $1);
1471         }eg;
1472
1473         return $line;
1474 }
1475
1476 # format marker of refs pointing to given object
1477
1478 # the destination action is chosen based on object type and current context:
1479 # - for annotated tags, we choose the tag view unless it's the current view
1480 #   already, in which case we go to shortlog view
1481 # - for other refs, we keep the current view if we're in history, shortlog or
1482 #   log view, and select shortlog otherwise
1483 sub format_ref_marker {
1484         my ($refs, $id) = @_;
1485         my $markers = '';
1486
1487         if (defined $refs->{$id}) {
1488                 foreach my $ref (@{$refs->{$id}}) {
1489                         # this code exploits the fact that non-lightweight tags are the
1490                         # only indirect objects, and that they are the only objects for which
1491                         # we want to use tag instead of shortlog as action
1492                         my ($type, $name) = qw();
1493                         my $indirect = ($ref =~ s/\^\{\}$//);
1494                         # e.g. tags/v2.6.11 or heads/next
1495                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1496                                 $type = $1;
1497                                 $name = $2;
1498                         } else {
1499                                 $type = "ref";
1500                                 $name = $ref;
1501                         }
1502
1503                         my $class = $type;
1504                         $class .= " indirect" if $indirect;
1505
1506                         my $dest_action = "shortlog";
1507
1508                         if ($indirect) {
1509                                 $dest_action = "tag" unless $action eq "tag";
1510                         } elsif ($action =~ /^(history|(short)?log)$/) {
1511                                 $dest_action = $action;
1512                         }
1513
1514                         my $dest = "";
1515                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1516                         $dest .= $ref;
1517
1518                         my $link = $cgi->a({
1519                                 -href => href(
1520                                         action=>$dest_action,
1521                                         hash=>$dest
1522                                 )}, $name);
1523
1524                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1525                                 $link . "</span>";
1526                 }
1527         }
1528
1529         if ($markers) {
1530                 return ' <span class="refs">'. $markers . '</span>';
1531         } else {
1532                 return "";
1533         }
1534 }
1535
1536 # format, perhaps shortened and with markers, title line
1537 sub format_subject_html {
1538         my ($long, $short, $href, $extra) = @_;
1539         $extra = '' unless defined($extra);
1540
1541         if (length($short) < length($long)) {
1542                 $long =~ s/[[:cntrl:]]/?/g;
1543                 return $cgi->a({-href => $href, -class => "list subject",
1544                                 -title => to_utf8($long)},
1545                        esc_html($short)) . $extra;
1546         } else {
1547                 return $cgi->a({-href => $href, -class => "list subject"},
1548                        esc_html($long)) . $extra;
1549         }
1550 }
1551
1552 # Rather than recomputing the url for an email multiple times, we cache it
1553 # after the first hit. This gives a visible benefit in views where the avatar
1554 # for the same email is used repeatedly (e.g. shortlog).
1555 # The cache is shared by all avatar engines (currently gravatar only), which
1556 # are free to use it as preferred. Since only one avatar engine is used for any
1557 # given page, there's no risk for cache conflicts.
1558 our %avatar_cache = ();
1559
1560 # Compute the picon url for a given email, by using the picon search service over at
1561 # http://www.cs.indiana.edu/picons/search.html
1562 sub picon_url {
1563         my $email = lc shift;
1564         if (!$avatar_cache{$email}) {
1565                 my ($user, $domain) = split('@', $email);
1566                 $avatar_cache{$email} =
1567                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1568                         "$domain/$user/" .
1569                         "users+domains+unknown/up/single";
1570         }
1571         return $avatar_cache{$email};
1572 }
1573
1574 # Compute the gravatar url for a given email, if it's not in the cache already.
1575 # Gravatar stores only the part of the URL before the size, since that's the
1576 # one computationally more expensive. This also allows reuse of the cache for
1577 # different sizes (for this particular engine).
1578 sub gravatar_url {
1579         my $email = lc shift;
1580         my $size = shift;
1581         $avatar_cache{$email} ||=
1582                 "http://www.gravatar.com/avatar/" .
1583                         Digest::MD5::md5_hex($email) . "?s=";
1584         return $avatar_cache{$email} . $size;
1585 }
1586
1587 # Insert an avatar for the given $email at the given $size if the feature
1588 # is enabled.
1589 sub git_get_avatar {
1590         my ($email, %opts) = @_;
1591         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1592         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1593         $opts{-size} ||= 'default';
1594         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1595         my $url = "";
1596         if ($git_avatar eq 'gravatar') {
1597                 $url = gravatar_url($email, $size);
1598         } elsif ($git_avatar eq 'picon') {
1599                 $url = picon_url($email);
1600         }
1601         # Other providers can be added by extending the if chain, defining $url
1602         # as needed. If no variant puts something in $url, we assume avatars
1603         # are completely disabled/unavailable.
1604         if ($url) {
1605                 return $pre_white .
1606                        "<img width=\"$size\" " .
1607                             "class=\"avatar\" " .
1608                             "src=\"$url\" " .
1609                             "alt=\"\" " .
1610                        "/>" . $post_white;
1611         } else {
1612                 return "";
1613         }
1614 }
1615
1616 sub format_search_author {
1617         my ($author, $searchtype, $displaytext) = @_;
1618         my $have_search = gitweb_check_feature('search');
1619
1620         if ($have_search) {
1621                 my $performed = "";
1622                 if ($searchtype eq 'author') {
1623                         $performed = "authored";
1624                 } elsif ($searchtype eq 'committer') {
1625                         $performed = "committed";
1626                 }
1627
1628                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1629                                 searchtext=>$author,
1630                                 searchtype=>$searchtype), class=>"list",
1631                                 title=>"Search for commits $performed by $author"},
1632                                 $displaytext);
1633
1634         } else {
1635                 return $displaytext;
1636         }
1637 }
1638
1639 # format the author name of the given commit with the given tag
1640 # the author name is chopped and escaped according to the other
1641 # optional parameters (see chop_str).
1642 sub format_author_html {
1643         my $tag = shift;
1644         my $co = shift;
1645         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1646         return "<$tag class=\"author\">" .
1647                format_search_author($co->{'author_name'}, "author",
1648                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1649                        $author) .
1650                "</$tag>";
1651 }
1652
1653 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1654 sub format_git_diff_header_line {
1655         my $line = shift;
1656         my $diffinfo = shift;
1657         my ($from, $to) = @_;
1658
1659         if ($diffinfo->{'nparents'}) {
1660                 # combined diff
1661                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1662                 if ($to->{'href'}) {
1663                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1664                                          esc_path($to->{'file'}));
1665                 } else { # file was deleted (no href)
1666                         $line .= esc_path($to->{'file'});
1667                 }
1668         } else {
1669                 # "ordinary" diff
1670                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1671                 if ($from->{'href'}) {
1672                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1673                                          'a/' . esc_path($from->{'file'}));
1674                 } else { # file was added (no href)
1675                         $line .= 'a/' . esc_path($from->{'file'});
1676                 }
1677                 $line .= ' ';
1678                 if ($to->{'href'}) {
1679                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1680                                          'b/' . esc_path($to->{'file'}));
1681                 } else { # file was deleted
1682                         $line .= 'b/' . esc_path($to->{'file'});
1683                 }
1684         }
1685
1686         return "<div class=\"diff header\">$line</div>\n";
1687 }
1688
1689 # format extended diff header line, before patch itself
1690 sub format_extended_diff_header_line {
1691         my $line = shift;
1692         my $diffinfo = shift;
1693         my ($from, $to) = @_;
1694
1695         # match <path>
1696         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1697                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1698                                        esc_path($from->{'file'}));
1699         }
1700         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1701                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1702                                  esc_path($to->{'file'}));
1703         }
1704         # match single <mode>
1705         if ($line =~ m/\s(\d{6})$/) {
1706                 $line .= '<span class="info"> (' .
1707                          file_type_long($1) .
1708                          ')</span>';
1709         }
1710         # match <hash>
1711         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1712                 # can match only for combined diff
1713                 $line = 'index ';
1714                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1715                         if ($from->{'href'}[$i]) {
1716                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1717                                                   -class=>"hash"},
1718                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1719                         } else {
1720                                 $line .= '0' x 7;
1721                         }
1722                         # separator
1723                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1724                 }
1725                 $line .= '..';
1726                 if ($to->{'href'}) {
1727                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1728                                          substr($diffinfo->{'to_id'},0,7));
1729                 } else {
1730                         $line .= '0' x 7;
1731                 }
1732
1733         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1734                 # can match only for ordinary diff
1735                 my ($from_link, $to_link);
1736                 if ($from->{'href'}) {
1737                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1738                                              substr($diffinfo->{'from_id'},0,7));
1739                 } else {
1740                         $from_link = '0' x 7;
1741                 }
1742                 if ($to->{'href'}) {
1743                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1744                                            substr($diffinfo->{'to_id'},0,7));
1745                 } else {
1746                         $to_link = '0' x 7;
1747                 }
1748                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1749                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1750         }
1751
1752         return $line . "<br/>\n";
1753 }
1754
1755 # format from-file/to-file diff header
1756 sub format_diff_from_to_header {
1757         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1758         my $line;
1759         my $result = '';
1760
1761         $line = $from_line;
1762         #assert($line =~ m/^---/) if DEBUG;
1763         # no extra formatting for "^--- /dev/null"
1764         if (! $diffinfo->{'nparents'}) {
1765                 # ordinary (single parent) diff
1766                 if ($line =~ m!^--- "?a/!) {
1767                         if ($from->{'href'}) {
1768                                 $line = '--- a/' .
1769                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1770                                                 esc_path($from->{'file'}));
1771                         } else {
1772                                 $line = '--- a/' .
1773                                         esc_path($from->{'file'});
1774                         }
1775                 }
1776                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1777
1778         } else {
1779                 # combined diff (merge commit)
1780                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1781                         if ($from->{'href'}[$i]) {
1782                                 $line = '--- ' .
1783                                         $cgi->a({-href=>href(action=>"blobdiff",
1784                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1785                                                              hash_parent_base=>$parents[$i],
1786                                                              file_parent=>$from->{'file'}[$i],
1787                                                              hash=>$diffinfo->{'to_id'},
1788                                                              hash_base=>$hash,
1789                                                              file_name=>$to->{'file'}),
1790                                                  -class=>"path",
1791                                                  -title=>"diff" . ($i+1)},
1792                                                 $i+1) .
1793                                         '/' .
1794                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1795                                                 esc_path($from->{'file'}[$i]));
1796                         } else {
1797                                 $line = '--- /dev/null';
1798                         }
1799                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1800                 }
1801         }
1802
1803         $line = $to_line;
1804         #assert($line =~ m/^\+\+\+/) if DEBUG;
1805         # no extra formatting for "^+++ /dev/null"
1806         if ($line =~ m!^\+\+\+ "?b/!) {
1807                 if ($to->{'href'}) {
1808                         $line = '+++ b/' .
1809                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1810                                         esc_path($to->{'file'}));
1811                 } else {
1812                         $line = '+++ b/' .
1813                                 esc_path($to->{'file'});
1814                 }
1815         }
1816         $result .= qq!<div class="diff to_file">$line</div>\n!;
1817
1818         return $result;
1819 }
1820
1821 # create note for patch simplified by combined diff
1822 sub format_diff_cc_simplified {
1823         my ($diffinfo, @parents) = @_;
1824         my $result = '';
1825
1826         $result .= "<div class=\"diff header\">" .
1827                    "diff --cc ";
1828         if (!is_deleted($diffinfo)) {
1829                 $result .= $cgi->a({-href => href(action=>"blob",
1830                                                   hash_base=>$hash,
1831                                                   hash=>$diffinfo->{'to_id'},
1832                                                   file_name=>$diffinfo->{'to_file'}),
1833                                     -class => "path"},
1834                                    esc_path($diffinfo->{'to_file'}));
1835         } else {
1836                 $result .= esc_path($diffinfo->{'to_file'});
1837         }
1838         $result .= "</div>\n" . # class="diff header"
1839                    "<div class=\"diff nodifferences\">" .
1840                    "Simple merge" .
1841                    "</div>\n"; # class="diff nodifferences"
1842
1843         return $result;
1844 }
1845
1846 # format patch (diff) line (not to be used for diff headers)
1847 sub format_diff_line {
1848         my $line = shift;
1849         my ($from, $to) = @_;
1850         my $diff_class = "";
1851
1852         chomp $line;
1853
1854         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1855                 # combined diff
1856                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1857                 if ($line =~ m/^\@{3}/) {
1858                         $diff_class = " chunk_header";
1859                 } elsif ($line =~ m/^\\/) {
1860                         $diff_class = " incomplete";
1861                 } elsif ($prefix =~ tr/+/+/) {
1862                         $diff_class = " add";
1863                 } elsif ($prefix =~ tr/-/-/) {
1864                         $diff_class = " rem";
1865                 }
1866         } else {
1867                 # assume ordinary diff
1868                 my $char = substr($line, 0, 1);
1869                 if ($char eq '+') {
1870                         $diff_class = " add";
1871                 } elsif ($char eq '-') {
1872                         $diff_class = " rem";
1873                 } elsif ($char eq '@') {
1874                         $diff_class = " chunk_header";
1875                 } elsif ($char eq "\\") {
1876                         $diff_class = " incomplete";
1877                 }
1878         }
1879         $line = untabify($line);
1880         if ($from && $to && $line =~ m/^\@{2} /) {
1881                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1882                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1883
1884                 $from_lines = 0 unless defined $from_lines;
1885                 $to_lines   = 0 unless defined $to_lines;
1886
1887                 if ($from->{'href'}) {
1888                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1889                                              -class=>"list"}, $from_text);
1890                 }
1891                 if ($to->{'href'}) {
1892                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1893                                              -class=>"list"}, $to_text);
1894                 }
1895                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1896                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1897                 return "<div class=\"diff$diff_class\">$line</div>\n";
1898         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1899                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1900                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1901
1902                 @from_text = split(' ', $ranges);
1903                 for (my $i = 0; $i < @from_text; ++$i) {
1904                         ($from_start[$i], $from_nlines[$i]) =
1905                                 (split(',', substr($from_text[$i], 1)), 0);
1906                 }
1907
1908                 $to_text   = pop @from_text;
1909                 $to_start  = pop @from_start;
1910                 $to_nlines = pop @from_nlines;
1911
1912                 $line = "<span class=\"chunk_info\">$prefix ";
1913                 for (my $i = 0; $i < @from_text; ++$i) {
1914                         if ($from->{'href'}[$i]) {
1915                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1916                                                   -class=>"list"}, $from_text[$i]);
1917                         } else {
1918                                 $line .= $from_text[$i];
1919                         }
1920                         $line .= " ";
1921                 }
1922                 if ($to->{'href'}) {
1923                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1924                                           -class=>"list"}, $to_text);
1925                 } else {
1926                         $line .= $to_text;
1927                 }
1928                 $line .= " $prefix</span>" .
1929                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1930                 return "<div class=\"diff$diff_class\">$line</div>\n";
1931         }
1932         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1933 }
1934
1935 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1936 # linked.  Pass the hash of the tree/commit to snapshot.
1937 sub format_snapshot_links {
1938         my ($hash) = @_;
1939         my $num_fmts = @snapshot_fmts;
1940         if ($num_fmts > 1) {
1941                 # A parenthesized list of links bearing format names.
1942                 # e.g. "snapshot (_tar.gz_ _zip_)"
1943                 return "snapshot (" . join(' ', map
1944                         $cgi->a({
1945                                 -href => href(
1946                                         action=>"snapshot",
1947                                         hash=>$hash,
1948                                         snapshot_format=>$_
1949                                 )
1950                         }, $known_snapshot_formats{$_}{'display'})
1951                 , @snapshot_fmts) . ")";
1952         } elsif ($num_fmts == 1) {
1953                 # A single "snapshot" link whose tooltip bears the format name.
1954                 # i.e. "_snapshot_"
1955                 my ($fmt) = @snapshot_fmts;
1956                 return
1957                         $cgi->a({
1958                                 -href => href(
1959                                         action=>"snapshot",
1960                                         hash=>$hash,
1961                                         snapshot_format=>$fmt
1962                                 ),
1963                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1964                         }, "snapshot");
1965         } else { # $num_fmts == 0
1966                 return undef;
1967         }
1968 }
1969
1970 ## ......................................................................
1971 ## functions returning values to be passed, perhaps after some
1972 ## transformation, to other functions; e.g. returning arguments to href()
1973
1974 # returns hash to be passed to href to generate gitweb URL
1975 # in -title key it returns description of link
1976 sub get_feed_info {
1977         my $format = shift || 'Atom';
1978         my %res = (action => lc($format));
1979
1980         # feed links are possible only for project views
1981         return unless (defined $project);
1982         # some views should link to OPML, or to generic project feed,
1983         # or don't have specific feed yet (so they should use generic)
1984         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1985
1986         my $branch;
1987         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1988         # from tag links; this also makes possible to detect branch links
1989         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1990             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1991                 $branch = $1;
1992         }
1993         # find log type for feed description (title)
1994         my $type = 'log';
1995         if (defined $file_name) {
1996                 $type  = "history of $file_name";
1997                 $type .= "/" if ($action eq 'tree');
1998                 $type .= " on '$branch'" if (defined $branch);
1999         } else {
2000                 $type = "log of $branch" if (defined $branch);
2001         }
2002
2003         $res{-title} = $type;
2004         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2005         $res{'file_name'} = $file_name;
2006
2007         return %res;
2008 }
2009
2010 ## ----------------------------------------------------------------------
2011 ## git utility subroutines, invoking git commands
2012
2013 # returns path to the core git executable and the --git-dir parameter as list
2014 sub git_cmd {
2015         return $GIT, '--git-dir='.$git_dir;
2016 }
2017
2018 # quote the given arguments for passing them to the shell
2019 # quote_command("command", "arg 1", "arg with ' and ! characters")
2020 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2021 # Try to avoid using this function wherever possible.
2022 sub quote_command {
2023         return join(' ',
2024                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2025 }
2026
2027 # get HEAD ref of given project as hash
2028 sub git_get_head_hash {
2029         my $project = shift;
2030         my $o_git_dir = $git_dir;
2031         my $retval = undef;
2032         $git_dir = "$projectroot/$project";
2033         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2034                 my $head = <$fd>;
2035                 close $fd;
2036                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2037                         $retval = $1;
2038                 }
2039         }
2040         if (defined $o_git_dir) {
2041                 $git_dir = $o_git_dir;
2042         }
2043         return $retval;
2044 }
2045
2046 # get type of given object
2047 sub git_get_type {
2048         my $hash = shift;
2049
2050         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2051         my $type = <$fd>;
2052         close $fd or return;
2053         chomp $type;
2054         return $type;
2055 }
2056
2057 # repository configuration
2058 our $config_file = '';
2059 our %config;
2060
2061 # store multiple values for single key as anonymous array reference
2062 # single values stored directly in the hash, not as [ <value> ]
2063 sub hash_set_multi {
2064         my ($hash, $key, $value) = @_;
2065
2066         if (!exists $hash->{$key}) {
2067                 $hash->{$key} = $value;
2068         } elsif (!ref $hash->{$key}) {
2069                 $hash->{$key} = [ $hash->{$key}, $value ];
2070         } else {
2071                 push @{$hash->{$key}}, $value;
2072         }
2073 }
2074
2075 # return hash of git project configuration
2076 # optionally limited to some section, e.g. 'gitweb'
2077 sub git_parse_project_config {
2078         my $section_regexp = shift;
2079         my %config;
2080
2081         local $/ = "\0";
2082
2083         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2084                 or return;
2085
2086         while (my $keyval = <$fh>) {
2087                 chomp $keyval;
2088                 my ($key, $value) = split(/\n/, $keyval, 2);
2089
2090                 hash_set_multi(\%config, $key, $value)
2091                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2092         }
2093         close $fh;
2094
2095         return %config;
2096 }
2097
2098 # convert config value to boolean: 'true' or 'false'
2099 # no value, number > 0, 'true' and 'yes' values are true
2100 # rest of values are treated as false (never as error)
2101 sub config_to_bool {
2102         my $val = shift;
2103
2104         return 1 if !defined $val;             # section.key
2105
2106         # strip leading and trailing whitespace
2107         $val =~ s/^\s+//;
2108         $val =~ s/\s+$//;
2109
2110         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2111                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2112 }
2113
2114 # convert config value to simple decimal number
2115 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2116 # to be multiplied by 1024, 1048576, or 1073741824
2117 sub config_to_int {
2118         my $val = shift;
2119
2120         # strip leading and trailing whitespace
2121         $val =~ s/^\s+//;
2122         $val =~ s/\s+$//;
2123
2124         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2125                 $unit = lc($unit);
2126                 # unknown unit is treated as 1
2127                 return $num * ($unit eq 'g' ? 1073741824 :
2128                                $unit eq 'm' ?    1048576 :
2129                                $unit eq 'k' ?       1024 : 1);
2130         }
2131         return $val;
2132 }
2133
2134 # convert config value to array reference, if needed
2135 sub config_to_multi {
2136         my $val = shift;
2137
2138         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2139 }
2140
2141 sub git_get_project_config {
2142         my ($key, $type) = @_;
2143
2144         # key sanity check
2145         return unless ($key);
2146         $key =~ s/^gitweb\.//;
2147         return if ($key =~ m/\W/);
2148
2149         # type sanity check
2150         if (defined $type) {
2151                 $type =~ s/^--//;
2152                 $type = undef
2153                         unless ($type eq 'bool' || $type eq 'int');
2154         }
2155
2156         # get config
2157         if (!defined $config_file ||
2158             $config_file ne "$git_dir/config") {
2159                 %config = git_parse_project_config('gitweb');
2160                 $config_file = "$git_dir/config";
2161         }
2162
2163         # check if config variable (key) exists
2164         return unless exists $config{"gitweb.$key"};
2165
2166         # ensure given type
2167         if (!defined $type) {
2168                 return $config{"gitweb.$key"};
2169         } elsif ($type eq 'bool') {
2170                 # backward compatibility: 'git config --bool' returns true/false
2171                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2172         } elsif ($type eq 'int') {
2173                 return config_to_int($config{"gitweb.$key"});
2174         }
2175         return $config{"gitweb.$key"};
2176 }
2177
2178 # get hash of given path at given ref
2179 sub git_get_hash_by_path {
2180         my $base = shift;
2181         my $path = shift || return undef;
2182         my $type = shift;
2183
2184         $path =~ s,/+$,,;
2185
2186         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2187                 or die_error(500, "Open git-ls-tree failed");
2188         my $line = <$fd>;
2189         close $fd or return undef;
2190
2191         if (!defined $line) {
2192                 # there is no tree or hash given by $path at $base
2193                 return undef;
2194         }
2195
2196         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2197         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2198         if (defined $type && $type ne $2) {
2199                 # type doesn't match
2200                 return undef;
2201         }
2202         return $3;
2203 }
2204
2205 # get path of entry with given hash at given tree-ish (ref)
2206 # used to get 'from' filename for combined diff (merge commit) for renames
2207 sub git_get_path_by_hash {
2208         my $base = shift || return;
2209         my $hash = shift || return;
2210
2211         local $/ = "\0";
2212
2213         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2214                 or return undef;
2215         while (my $line = <$fd>) {
2216                 chomp $line;
2217
2218                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2219                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2220                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2221                         close $fd;
2222                         return $1;
2223                 }
2224         }
2225         close $fd;
2226         return undef;
2227 }
2228
2229 ## ......................................................................
2230 ## git utility functions, directly accessing git repository
2231
2232 sub git_get_project_description {
2233         my $path = shift;
2234
2235         $git_dir = "$projectroot/$path";
2236         open my $fd, '<', "$git_dir/description"
2237                 or return git_get_project_config('description');
2238         my $descr = <$fd>;
2239         close $fd;
2240         if (defined $descr) {
2241                 chomp $descr;
2242         }
2243         return $descr;
2244 }
2245
2246 sub git_get_project_ctags {
2247         my $path = shift;
2248         my $ctags = {};
2249
2250         $git_dir = "$projectroot/$path";
2251         opendir my $dh, "$git_dir/ctags"
2252                 or return $ctags;
2253         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2254                 open my $ct, '<', $_ or next;
2255                 my $val = <$ct>;
2256                 chomp $val;
2257                 close $ct;
2258                 my $ctag = $_; $ctag =~ s#.*/##;
2259                 $ctags->{$ctag} = $val;
2260         }
2261         closedir $dh;
2262         $ctags;
2263 }
2264
2265 sub git_populate_project_tagcloud {
2266         my $ctags = shift;
2267
2268         # First, merge different-cased tags; tags vote on casing
2269         my %ctags_lc;
2270         foreach (keys %$ctags) {
2271                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2272                 if (not $ctags_lc{lc $_}->{topcount}
2273                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2274                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2275                         $ctags_lc{lc $_}->{topname} = $_;
2276                 }
2277         }
2278
2279         my $cloud;
2280         if (eval { require HTML::TagCloud; 1; }) {
2281                 $cloud = HTML::TagCloud->new;
2282                 foreach (sort keys %ctags_lc) {
2283                         # Pad the title with spaces so that the cloud looks
2284                         # less crammed.
2285                         my $title = $ctags_lc{$_}->{topname};
2286                         $title =~ s/ /&nbsp;/g;
2287                         $title =~ s/^/&nbsp;/g;
2288                         $title =~ s/$/&nbsp;/g;
2289                         $cloud->add($title, href(action=>'project_list', by_tag=>$_),
2290                                     $ctags_lc{$_}->{count});
2291                 }
2292         } else {
2293                 $cloud = \%ctags_lc;
2294         }
2295         $cloud;
2296 }
2297
2298 sub git_show_project_tagcloud {
2299         my ($cloud, $count) = @_;
2300         print STDERR ref($cloud)."..\n";
2301         if (ref $cloud eq 'HTML::TagCloud') {
2302                 return $cloud->html_and_css($count);
2303         } else {
2304                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2305                 return '<p align="center">' . join (', ', map {
2306                         $cgi->a({-href => href(action=>'project_list', by_tag=>$_)},
2307                                 $cloud->{$_}->{topname});
2308                 } splice(@tags, 0, $count)) . '</p>';
2309         }
2310 }
2311
2312 sub git_get_project_url_list {
2313         my $path = shift;
2314
2315         $git_dir = "$projectroot/$path";
2316         open my $fd, '<', "$git_dir/cloneurl"
2317                 or return wantarray ?
2318                 @{ config_to_multi(git_get_project_config('url')) } :
2319                    config_to_multi(git_get_project_config('url'));
2320         my @git_project_url_list = map { chomp; $_ } <$fd>;
2321         close $fd;
2322
2323         return wantarray ? @git_project_url_list : \@git_project_url_list;
2324 }
2325
2326 sub git_get_projects_list {
2327         my ($filter) = @_;
2328         my @list;
2329
2330         $filter ||= '';
2331         $filter =~ s/\.git$//;
2332
2333         my $check_forks = gitweb_check_feature('forks');
2334
2335         if (-d $projects_list) {
2336                 # search in directory
2337                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2338                 # remove the trailing "/"
2339                 $dir =~ s!/+$!!;
2340                 my $pfxlen = length("$dir");
2341                 my $pfxdepth = ($dir =~ tr!/!!);
2342
2343                 File::Find::find({
2344                         follow_fast => 1, # follow symbolic links
2345                         follow_skip => 2, # ignore duplicates
2346                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2347                         wanted => sub {
2348                                 # skip project-list toplevel, if we get it.
2349                                 return if (m!^[/.]$!);
2350                                 # only directories can be git repositories
2351                                 return unless (-d $_);
2352                                 # don't traverse too deep (Find is super slow on os x)
2353                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2354                                         $File::Find::prune = 1;
2355                                         return;
2356                                 }
2357
2358                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2359                                 # we check related file in $projectroot
2360                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2361                                 if (check_export_ok("$projectroot/$path")) {
2362                                         push @list, { path => $path };
2363                                         $File::Find::prune = 1;
2364                                 }
2365                         },
2366                 }, "$dir");
2367
2368         } elsif (-f $projects_list) {
2369                 # read from file(url-encoded):
2370                 # 'git%2Fgit.git Linus+Torvalds'
2371                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2372                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2373                 my %paths;
2374                 open my $fd, '<', $projects_list or return;
2375         PROJECT:
2376                 while (my $line = <$fd>) {
2377                         chomp $line;
2378                         my ($path, $owner) = split ' ', $line;
2379                         $path = unescape($path);
2380                         $owner = unescape($owner);
2381                         if (!defined $path) {
2382                                 next;
2383                         }
2384                         if ($filter ne '') {
2385                                 # looking for forks;
2386                                 my $pfx = substr($path, 0, length($filter));
2387                                 if ($pfx ne $filter) {
2388                                         next PROJECT;
2389                                 }
2390                                 my $sfx = substr($path, length($filter));
2391                                 if ($sfx !~ /^\/.*\.git$/) {
2392                                         next PROJECT;
2393                                 }
2394                         } elsif ($check_forks) {
2395                         PATH:
2396                                 foreach my $filter (keys %paths) {
2397                                         # looking for forks;
2398                                         my $pfx = substr($path, 0, length($filter));
2399                                         if ($pfx ne $filter) {
2400                                                 next PATH;
2401                                         }
2402                                         my $sfx = substr($path, length($filter));
2403                                         if ($sfx !~ /^\/.*\.git$/) {
2404                                                 next PATH;
2405                                         }
2406                                         # is a fork, don't include it in
2407                                         # the list
2408                                         next PROJECT;
2409                                 }
2410                         }
2411                         if (check_export_ok("$projectroot/$path")) {
2412                                 my $pr = {
2413                                         path => $path,
2414                                         owner => to_utf8($owner),
2415                                 };
2416                                 push @list, $pr;
2417                                 (my $forks_path = $path) =~ s/\.git$//;
2418                                 $paths{$forks_path}++;
2419                         }
2420                 }
2421                 close $fd;
2422         }
2423         return @list;
2424 }
2425
2426 our $gitweb_project_owner = undef;
2427 sub git_get_project_list_from_file {
2428
2429         return if (defined $gitweb_project_owner);
2430
2431         $gitweb_project_owner = {};
2432         # read from file (url-encoded):
2433         # 'git%2Fgit.git Linus+Torvalds'
2434         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2435         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2436         if (-f $projects_list) {
2437                 open(my $fd, '<', $projects_list);
2438                 while (my $line = <$fd>) {
2439                         chomp $line;
2440                         my ($pr, $ow) = split ' ', $line;
2441                         $pr = unescape($pr);
2442                         $ow = unescape($ow);
2443                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2444                 }
2445                 close $fd;
2446         }
2447 }
2448
2449 sub git_get_project_owner {
2450         my $project = shift;
2451         my $owner;
2452
2453         return undef unless $project;
2454         $git_dir = "$projectroot/$project";
2455
2456         if (!defined $gitweb_project_owner) {
2457                 git_get_project_list_from_file();
2458         }
2459
2460         if (exists $gitweb_project_owner->{$project}) {
2461                 $owner = $gitweb_project_owner->{$project};
2462         }
2463         if (!defined $owner){
2464                 $owner = git_get_project_config('owner');
2465         }
2466         if (!defined $owner) {
2467                 $owner = get_file_owner("$git_dir");
2468         }
2469
2470         return $owner;
2471 }
2472
2473 sub git_get_last_activity {
2474         my ($path) = @_;
2475         my $fd;
2476
2477         $git_dir = "$projectroot/$path";
2478         open($fd, "-|", git_cmd(), 'for-each-ref',
2479              '--format=%(committer)',
2480              '--sort=-committerdate',
2481              '--count=1',
2482              'refs/heads') or return;
2483         my $most_recent = <$fd>;
2484         close $fd or return;
2485         if (defined $most_recent &&
2486             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2487                 my $timestamp = $1;
2488                 my $age = time - $timestamp;
2489                 return ($age, age_string($age));
2490         }
2491         return (undef, undef);
2492 }
2493
2494 sub git_get_references {
2495         my $type = shift || "";
2496         my %refs;
2497         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2498         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2499         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2500                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2501                 or return;
2502
2503         while (my $line = <$fd>) {
2504                 chomp $line;
2505                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2506                         if (defined $refs{$1}) {
2507                                 push @{$refs{$1}}, $2;
2508                         } else {
2509                                 $refs{$1} = [ $2 ];
2510                         }
2511                 }
2512         }
2513         close $fd or return;
2514         return \%refs;
2515 }
2516
2517 sub git_get_rev_name_tags {
2518         my $hash = shift || return undef;
2519
2520         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2521                 or return;
2522         my $name_rev = <$fd>;
2523         close $fd;
2524
2525         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2526                 return $1;
2527         } else {
2528                 # catches also '$hash undefined' output
2529                 return undef;
2530         }
2531 }
2532
2533 ## ----------------------------------------------------------------------
2534 ## parse to hash functions
2535
2536 sub parse_date {
2537         my $epoch = shift;
2538         my $tz = shift || "-0000";
2539
2540         my %date;
2541         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2542         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2543         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2544         $date{'hour'} = $hour;
2545         $date{'minute'} = $min;
2546         $date{'mday'} = $mday;
2547         $date{'day'} = $days[$wday];
2548         $date{'month'} = $months[$mon];
2549         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2550                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2551         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2552                              $mday, $months[$mon], $hour ,$min;
2553         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2554                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2555
2556         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2557         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2558         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2559         $date{'hour_local'} = $hour;
2560         $date{'minute_local'} = $min;
2561         $date{'tz_local'} = $tz;
2562         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2563                                   1900+$year, $mon+1, $mday,
2564                                   $hour, $min, $sec, $tz);
2565         return %date;
2566 }
2567
2568 sub parse_tag {
2569         my $tag_id = shift;
2570         my %tag;
2571         my @comment;
2572
2573         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2574         $tag{'id'} = $tag_id;
2575         while (my $line = <$fd>) {
2576                 chomp $line;
2577                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2578                         $tag{'object'} = $1;
2579                 } elsif ($line =~ m/^type (.+)$/) {
2580                         $tag{'type'} = $1;
2581                 } elsif ($line =~ m/^tag (.+)$/) {
2582                         $tag{'name'} = $1;
2583                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2584                         $tag{'author'} = $1;
2585                         $tag{'author_epoch'} = $2;
2586                         $tag{'author_tz'} = $3;
2587                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2588                                 $tag{'author_name'}  = $1;
2589                                 $tag{'author_email'} = $2;
2590                         } else {
2591                                 $tag{'author_name'} = $tag{'author'};
2592                         }
2593                 } elsif ($line =~ m/--BEGIN/) {
2594                         push @comment, $line;
2595                         last;
2596                 } elsif ($line eq "") {
2597                         last;
2598                 }
2599         }
2600         push @comment, <$fd>;
2601         $tag{'comment'} = \@comment;
2602         close $fd or return;
2603         if (!defined $tag{'name'}) {
2604                 return
2605         };
2606         return %tag
2607 }
2608
2609 sub parse_commit_text {
2610         my ($commit_text, $withparents) = @_;
2611         my @commit_lines = split '\n', $commit_text;
2612         my %co;
2613
2614         pop @commit_lines; # Remove '\0'
2615
2616         if (! @commit_lines) {
2617                 return;
2618         }
2619
2620         my $header = shift @commit_lines;
2621         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2622                 return;
2623         }
2624         ($co{'id'}, my @parents) = split ' ', $header;
2625         while (my $line = shift @commit_lines) {
2626                 last if $line eq "\n";
2627                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2628                         $co{'tree'} = $1;
2629                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2630                         push @parents, $1;
2631                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2632                         $co{'author'} = to_utf8($1);
2633                         $co{'author_epoch'} = $2;
2634                         $co{'author_tz'} = $3;
2635                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2636                                 $co{'author_name'}  = $1;
2637                                 $co{'author_email'} = $2;
2638                         } else {
2639                                 $co{'author_name'} = $co{'author'};
2640                         }
2641                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2642                         $co{'committer'} = to_utf8($1);
2643                         $co{'committer_epoch'} = $2;
2644                         $co{'committer_tz'} = $3;
2645                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2646                                 $co{'committer_name'}  = $1;
2647                                 $co{'committer_email'} = $2;
2648                         } else {
2649                                 $co{'committer_name'} = $co{'committer'};
2650                         }
2651                 }
2652         }
2653         if (!defined $co{'tree'}) {
2654                 return;
2655         };
2656         $co{'parents'} = \@parents;
2657         $co{'parent'} = $parents[0];
2658
2659         foreach my $title (@commit_lines) {
2660                 $title =~ s/^    //;
2661                 if ($title ne "") {
2662                         $co{'title'} = chop_str($title, 80, 5);
2663                         # remove leading stuff of merges to make the interesting part visible
2664                         if (length($title) > 50) {
2665                                 $title =~ s/^Automatic //;
2666                                 $title =~ s/^merge (of|with) /Merge ... /i;
2667                                 if (length($title) > 50) {
2668                                         $title =~ s/(http|rsync):\/\///;
2669                                 }
2670                                 if (length($title) > 50) {
2671                                         $title =~ s/(master|www|rsync)\.//;
2672                                 }
2673                                 if (length($title) > 50) {
2674                                         $title =~ s/kernel.org:?//;
2675                                 }
2676                                 if (length($title) > 50) {
2677                                         $title =~ s/\/pub\/scm//;
2678                                 }
2679                         }
2680                         $co{'title_short'} = chop_str($title, 50, 5);
2681                         last;
2682                 }
2683         }
2684         if (! defined $co{'title'} || $co{'title'} eq "") {
2685                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2686         }
2687         # remove added spaces
2688         foreach my $line (@commit_lines) {
2689                 $line =~ s/^    //;
2690         }
2691         $co{'comment'} = \@commit_lines;
2692
2693         my $age = time - $co{'committer_epoch'};
2694         $co{'age'} = $age;
2695         $co{'age_string'} = age_string($age);
2696         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2697         if ($age > 60*60*24*7*2) {
2698                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2699                 $co{'age_string_age'} = $co{'age_string'};
2700         } else {
2701                 $co{'age_string_date'} = $co{'age_string'};
2702                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2703         }
2704         return %co;
2705 }
2706
2707 sub parse_commit {
2708         my ($commit_id) = @_;
2709         my %co;
2710
2711         local $/ = "\0";
2712
2713         open my $fd, "-|", git_cmd(), "rev-list",
2714                 "--parents",
2715                 "--header",
2716                 "--max-count=1",
2717                 $commit_id,
2718                 "--",
2719                 or die_error(500, "Open git-rev-list failed");
2720         %co = parse_commit_text(<$fd>, 1);
2721         close $fd;
2722
2723         return %co;
2724 }
2725
2726 sub parse_commits {
2727         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2728         my @cos;
2729
2730         $maxcount ||= 1;
2731         $skip ||= 0;
2732
2733         local $/ = "\0";
2734
2735         open my $fd, "-|", git_cmd(), "rev-list",
2736                 "--header",
2737                 @args,
2738                 ("--max-count=" . $maxcount),
2739                 ("--skip=" . $skip),
2740                 @extra_options,
2741                 $commit_id,
2742                 "--",
2743                 ($filename ? ($filename) : ())
2744                 or die_error(500, "Open git-rev-list failed");
2745         while (my $line = <$fd>) {
2746                 my %co = parse_commit_text($line);
2747                 push @cos, \%co;
2748         }
2749         close $fd;
2750
2751         return wantarray ? @cos : \@cos;
2752 }
2753
2754 # parse line of git-diff-tree "raw" output
2755 sub parse_difftree_raw_line {
2756         my $line = shift;
2757         my %res;
2758
2759         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2760         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2761         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2762                 $res{'from_mode'} = $1;
2763                 $res{'to_mode'} = $2;
2764                 $res{'from_id'} = $3;
2765                 $res{'to_id'} = $4;
2766                 $res{'status'} = $5;
2767                 $res{'similarity'} = $6;
2768                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2769                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2770                 } else {
2771                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2772                 }
2773         }
2774         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2775         # combined diff (for merge commit)
2776         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2777                 $res{'nparents'}  = length($1);
2778                 $res{'from_mode'} = [ split(' ', $2) ];
2779                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2780                 $res{'from_id'} = [ split(' ', $3) ];
2781                 $res{'to_id'} = pop @{$res{'from_id'}};
2782                 $res{'status'} = [ split('', $4) ];
2783                 $res{'to_file'} = unquote($5);
2784         }
2785         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2786         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2787                 $res{'commit'} = $1;
2788         }
2789
2790         return wantarray ? %res : \%res;
2791 }
2792
2793 # wrapper: return parsed line of git-diff-tree "raw" output
2794 # (the argument might be raw line, or parsed info)
2795 sub parsed_difftree_line {
2796         my $line_or_ref = shift;
2797
2798         if (ref($line_or_ref) eq "HASH") {
2799                 # pre-parsed (or generated by hand)
2800                 return $line_or_ref;
2801         } else {
2802                 return parse_difftree_raw_line($line_or_ref);
2803         }
2804 }
2805
2806 # parse line of git-ls-tree output
2807 sub parse_ls_tree_line {
2808         my $line = shift;
2809         my %opts = @_;
2810         my %res;
2811
2812         if ($opts{'-l'}) {
2813                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2814                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2815
2816                 $res{'mode'} = $1;
2817                 $res{'type'} = $2;
2818                 $res{'hash'} = $3;
2819                 $res{'size'} = $4;
2820                 if ($opts{'-z'}) {
2821                         $res{'name'} = $5;
2822                 } else {
2823                         $res{'name'} = unquote($5);
2824                 }
2825         } else {
2826                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2827                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2828
2829                 $res{'mode'} = $1;
2830                 $res{'type'} = $2;
2831                 $res{'hash'} = $3;
2832                 if ($opts{'-z'}) {
2833                         $res{'name'} = $4;
2834                 } else {
2835                         $res{'name'} = unquote($4);
2836                 }
2837         }
2838
2839         return wantarray ? %res : \%res;
2840 }
2841
2842 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2843 sub parse_from_to_diffinfo {
2844         my ($diffinfo, $from, $to, @parents) = @_;
2845
2846         if ($diffinfo->{'nparents'}) {
2847                 # combined diff
2848                 $from->{'file'} = [];
2849                 $from->{'href'} = [];
2850                 fill_from_file_info($diffinfo, @parents)
2851                         unless exists $diffinfo->{'from_file'};
2852                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2853                         $from->{'file'}[$i] =
2854                                 defined $diffinfo->{'from_file'}[$i] ?
2855                                         $diffinfo->{'from_file'}[$i] :
2856                                         $diffinfo->{'to_file'};
2857                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2858                                 $from->{'href'}[$i] = href(action=>"blob",
2859                                                            hash_base=>$parents[$i],
2860                                                            hash=>$diffinfo->{'from_id'}[$i],
2861                                                            file_name=>$from->{'file'}[$i]);
2862                         } else {
2863                                 $from->{'href'}[$i] = undef;
2864                         }
2865                 }
2866         } else {
2867                 # ordinary (not combined) diff
2868                 $from->{'file'} = $diffinfo->{'from_file'};
2869                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2870                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2871                                                hash=>$diffinfo->{'from_id'},
2872                                                file_name=>$from->{'file'});
2873                 } else {
2874                         delete $from->{'href'};
2875                 }
2876         }
2877
2878         $to->{'file'} = $diffinfo->{'to_file'};
2879         if (!is_deleted($diffinfo)) { # file exists in result
2880                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2881                                      hash=>$diffinfo->{'to_id'},
2882                                      file_name=>$to->{'file'});
2883         } else {
2884                 delete $to->{'href'};
2885         }
2886 }
2887
2888 ## ......................................................................
2889 ## parse to array of hashes functions
2890
2891 sub git_get_heads_list {
2892         my $limit = shift;
2893         my @headslist;
2894
2895         open my $fd, '-|', git_cmd(), 'for-each-ref',
2896                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2897                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2898                 'refs/heads'
2899                 or return;
2900         while (my $line = <$fd>) {
2901                 my %ref_item;
2902
2903                 chomp $line;
2904                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2905                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2906                 my ($committer, $epoch, $tz) =
2907                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2908                 $ref_item{'fullname'}  = $name;
2909                 $name =~ s!^refs/heads/!!;
2910
2911                 $ref_item{'name'}  = $name;
2912                 $ref_item{'id'}    = $hash;
2913                 $ref_item{'title'} = $title || '(no commit message)';
2914                 $ref_item{'epoch'} = $epoch;
2915                 if ($epoch) {
2916                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2917                 } else {
2918                         $ref_item{'age'} = "unknown";
2919                 }
2920
2921                 push @headslist, \%ref_item;
2922         }
2923         close $fd;
2924
2925         return wantarray ? @headslist : \@headslist;
2926 }
2927
2928 sub git_get_tags_list {
2929         my $limit = shift;
2930         my @tagslist;
2931
2932         open my $fd, '-|', git_cmd(), 'for-each-ref',
2933                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2934                 '--format=%(objectname) %(objecttype) %(refname) '.
2935                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2936                 'refs/tags'
2937                 or return;
2938         while (my $line = <$fd>) {
2939                 my %ref_item;
2940
2941                 chomp $line;
2942                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2943                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2944                 my ($creator, $epoch, $tz) =
2945                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2946                 $ref_item{'fullname'} = $name;
2947                 $name =~ s!^refs/tags/!!;
2948
2949                 $ref_item{'type'} = $type;
2950                 $ref_item{'id'} = $id;
2951                 $ref_item{'name'} = $name;
2952                 if ($type eq "tag") {
2953                         $ref_item{'subject'} = $title;
2954                         $ref_item{'reftype'} = $reftype;
2955                         $ref_item{'refid'}   = $refid;
2956                 } else {
2957                         $ref_item{'reftype'} = $type;
2958                         $ref_item{'refid'}   = $id;
2959                 }
2960
2961                 if ($type eq "tag" || $type eq "commit") {
2962                         $ref_item{'epoch'} = $epoch;
2963                         if ($epoch) {
2964                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2965                         } else {
2966                                 $ref_item{'age'} = "unknown";
2967                         }
2968                 }
2969
2970                 push @tagslist, \%ref_item;
2971         }
2972         close $fd;
2973
2974         return wantarray ? @tagslist : \@tagslist;
2975 }
2976
2977 ## ----------------------------------------------------------------------
2978 ## filesystem-related functions
2979
2980 sub get_file_owner {
2981         my $path = shift;
2982
2983         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2984         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2985         if (!defined $gcos) {
2986                 return undef;
2987         }
2988         my $owner = $gcos;
2989         $owner =~ s/[,;].*$//;
2990         return to_utf8($owner);
2991 }
2992
2993 # assume that file exists
2994 sub insert_file {
2995         my $filename = shift;
2996
2997         open my $fd, '<', $filename;
2998         print map { to_utf8($_) } <$fd>;
2999         close $fd;
3000 }
3001
3002 ## ......................................................................
3003 ## mimetype related functions
3004
3005 sub mimetype_guess_file {
3006         my $filename = shift;
3007         my $mimemap = shift;
3008         -r $mimemap or return undef;
3009
3010         my %mimemap;
3011         open(my $mh, '<', $mimemap) or return undef;
3012         while (<$mh>) {
3013                 next if m/^#/; # skip comments
3014                 my ($mimetype, $exts) = split(/\t+/);
3015                 if (defined $exts) {
3016                         my @exts = split(/\s+/, $exts);
3017                         foreach my $ext (@exts) {
3018                                 $mimemap{$ext} = $mimetype;
3019                         }
3020                 }
3021         }
3022         close($mh);
3023
3024         $filename =~ /\.([^.]*)$/;
3025         return $mimemap{$1};
3026 }
3027
3028 sub mimetype_guess {
3029         my $filename = shift;
3030         my $mime;
3031         $filename =~ /\./ or return undef;
3032
3033         if ($mimetypes_file) {
3034                 my $file = $mimetypes_file;
3035                 if ($file !~ m!^/!) { # if it is relative path
3036                         # it is relative to project
3037                         $file = "$projectroot/$project/$file";
3038                 }
3039                 $mime = mimetype_guess_file($filename, $file);
3040         }
3041         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3042         return $mime;
3043 }
3044
3045 sub blob_mimetype {
3046         my $fd = shift;
3047         my $filename = shift;
3048
3049         if ($filename) {
3050                 my $mime = mimetype_guess($filename);
3051                 $mime and return $mime;
3052         }
3053
3054         # just in case
3055         return $default_blob_plain_mimetype unless $fd;
3056
3057         if (-T $fd) {
3058                 return 'text/plain';
3059         } elsif (! $filename) {
3060                 return 'application/octet-stream';
3061         } elsif ($filename =~ m/\.png$/i) {
3062                 return 'image/png';
3063         } elsif ($filename =~ m/\.gif$/i) {
3064                 return 'image/gif';
3065         } elsif ($filename =~ m/\.jpe?g$/i) {
3066                 return 'image/jpeg';
3067         } else {
3068                 return 'application/octet-stream';
3069         }
3070 }
3071
3072 sub blob_contenttype {
3073         my ($fd, $file_name, $type) = @_;
3074
3075         $type ||= blob_mimetype($fd, $file_name);
3076         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3077                 $type .= "; charset=$default_text_plain_charset";
3078         }
3079
3080         return $type;
3081 }
3082
3083 ## ======================================================================
3084 ## functions printing HTML: header, footer, error page
3085
3086 sub git_header_html {
3087         my $status = shift || "200 OK";
3088         my $expires = shift;
3089
3090         my $title = "$site_name";
3091         if (defined $project) {
3092                 $title .= " - " . to_utf8($project);
3093                 if (defined $action) {
3094                         $title .= "/$action";
3095                         if (defined $file_name) {
3096                                 $title .= " - " . esc_path($file_name);
3097                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3098                                         $title .= "/";
3099                                 }
3100                         }
3101                 }
3102         }
3103         my $content_type;
3104         # require explicit support from the UA if we are to send the page as
3105         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3106         # we have to do this because MSIE sometimes globs '*/*', pretending to
3107         # support xhtml+xml but choking when it gets what it asked for.
3108         if (defined $cgi->http('HTTP_ACCEPT') &&
3109             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3110             $cgi->Accept('application/xhtml+xml') != 0) {
3111                 $content_type = 'application/xhtml+xml';
3112         } else {
3113                 $content_type = 'text/html';
3114         }
3115         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3116                            -status=> $status, -expires => $expires);
3117         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3118         print <<EOF;
3119 <?xml version="1.0" encoding="utf-8"?>
3120 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3121 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3122 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3123 <!-- git core binaries version $git_version -->
3124 <head>
3125 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3126 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3127 <meta name="robots" content="index, nofollow"/>
3128 <title>$title</title>
3129 EOF
3130         # the stylesheet, favicon etc urls won't work correctly with path_info
3131         # unless we set the appropriate base URL
3132         if ($ENV{'PATH_INFO'}) {
3133                 print "<base href=\"".esc_url($base_url)."\" />\n";
3134         }
3135         # print out each stylesheet that exist, providing backwards capability
3136         # for those people who defined $stylesheet in a config file
3137         if (defined $stylesheet) {
3138                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3139         } else {
3140                 foreach my $stylesheet (@stylesheets) {
3141                         next unless $stylesheet;
3142                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3143                 }
3144         }
3145         if (defined $project) {
3146                 my %href_params = get_feed_info();
3147                 if (!exists $href_params{'-title'}) {
3148                         $href_params{'-title'} = 'log';
3149                 }
3150
3151                 foreach my $format qw(RSS Atom) {
3152                         my $type = lc($format);
3153                         my %link_attr = (
3154                                 '-rel' => 'alternate',
3155                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3156                                 '-type' => "application/$type+xml"
3157                         );
3158
3159                         $href_params{'action'} = $type;
3160                         $link_attr{'-href'} = href(%href_params);
3161                         print "<link ".
3162                               "rel=\"$link_attr{'-rel'}\" ".
3163                               "title=\"$link_attr{'-title'}\" ".
3164                               "href=\"$link_attr{'-href'}\" ".
3165                               "type=\"$link_attr{'-type'}\" ".
3166                               "/>\n";
3167
3168                         $href_params{'extra_options'} = '--no-merges';
3169                         $link_attr{'-href'} = href(%href_params);
3170                         $link_attr{'-title'} .= ' (no merges)';
3171                         print "<link ".
3172                               "rel=\"$link_attr{'-rel'}\" ".
3173                               "title=\"$link_attr{'-title'}\" ".
3174                               "href=\"$link_attr{'-href'}\" ".
3175                               "type=\"$link_attr{'-type'}\" ".
3176                               "/>\n";
3177                 }
3178
3179         } else {
3180                 printf('<link rel="alternate" title="%s projects list" '.
3181                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3182                        $site_name, href(project=>undef, action=>"project_index"));
3183                 printf('<link rel="alternate" title="%s projects feeds" '.
3184                        'href="%s" type="text/x-opml" />'."\n",
3185                        $site_name, href(project=>undef, action=>"opml"));
3186         }
3187         if (defined $favicon) {
3188                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3189         }
3190
3191         print "</head>\n" .
3192               "<body>\n";
3193
3194         if (-f $site_header) {
3195                 insert_file($site_header);
3196         }
3197
3198         print "<div class=\"page_header\">\n" .
3199               $cgi->a({-href => esc_url($logo_url),
3200                        -title => $logo_label},
3201                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3202         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3203         if (defined $project) {
3204                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3205                 if (defined $action) {
3206                         print " / $action";
3207                 }
3208                 print "\n";
3209         }
3210         print "</div>\n";
3211
3212         my $have_search = gitweb_check_feature('search');
3213         if (defined $project && $have_search) {
3214                 if (!defined $searchtext) {
3215                         $searchtext = "";
3216                 }
3217                 my $search_hash;
3218                 if (defined $hash_base) {
3219                         $search_hash = $hash_base;
3220                 } elsif (defined $hash) {
3221                         $search_hash = $hash;
3222                 } else {
3223                         $search_hash = "HEAD";
3224                 }
3225                 my $action = $my_uri;
3226                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3227                 if ($use_pathinfo) {
3228                         $action .= "/".esc_url($project);
3229                 }
3230                 print $cgi->startform(-method => "get", -action => $action) .
3231                       "<div class=\"search\">\n" .
3232                       (!$use_pathinfo &&
3233                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3234                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3235                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3236                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3237                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3238                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3239                       " search:\n",
3240                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3241                       "<span title=\"Extended regular expression\">" .
3242                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3243                                      -checked => $search_use_regexp) .
3244                       "</span>" .
3245                       "</div>" .
3246                       $cgi->end_form() . "\n";
3247         }
3248 }
3249
3250 sub git_footer_html {
3251         my $feed_class = 'rss_logo';
3252
3253         print "<div class=\"page_footer\">\n";
3254         if (defined $project) {
3255                 my $descr = git_get_project_description($project);
3256                 if (defined $descr) {
3257                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3258                 }
3259
3260                 my %href_params = get_feed_info();
3261                 if (!%href_params) {
3262                         $feed_class .= ' generic';
3263                 }
3264                 $href_params{'-title'} ||= 'log';
3265
3266                 foreach my $format qw(RSS Atom) {
3267                         $href_params{'action'} = lc($format);
3268                         print $cgi->a({-href => href(%href_params),
3269                                       -title => "$href_params{'-title'} $format feed",
3270                                       -class => $feed_class}, $format)."\n";
3271                 }
3272
3273         } else {
3274                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3275                               -class => $feed_class}, "OPML") . " ";
3276                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3277                               -class => $feed_class}, "TXT") . "\n";
3278         }
3279         print "</div>\n"; # class="page_footer"
3280
3281         if (-f $site_footer) {
3282                 insert_file($site_footer);
3283         }
3284
3285         print "</body>\n" .
3286               "</html>";
3287 }
3288
3289 # die_error(<http_status_code>, <error_message>)
3290 # Example: die_error(404, 'Hash not found')
3291 # By convention, use the following status codes (as defined in RFC 2616):
3292 # 400: Invalid or missing CGI parameters, or
3293 #      requested object exists but has wrong type.
3294 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3295 #      this server or project.
3296 # 404: Requested object/revision/project doesn't exist.
3297 # 500: The server isn't configured properly, or
3298 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3299 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3300 sub die_error {
3301         my $status = shift || 500;
3302         my $error = shift || "Internal server error";
3303
3304         my %http_responses = (400 => '400 Bad Request',
3305                               403 => '403 Forbidden',
3306                               404 => '404 Not Found',
3307                               500 => '500 Internal Server Error');
3308         git_header_html($http_responses{$status});
3309         print <<EOF;
3310 <div class="page_body">
3311 <br /><br />
3312 $status - $error
3313 <br />
3314 </div>
3315 EOF
3316         git_footer_html();
3317         exit;
3318 }
3319
3320 ## ----------------------------------------------------------------------
3321 ## functions printing or outputting HTML: navigation
3322
3323 sub git_print_page_nav {
3324         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3325         $extra = '' if !defined $extra; # pager or formats
3326
3327         my @navs = qw(summary shortlog log commit commitdiff tree);
3328         if ($suppress) {
3329                 @navs = grep { $_ ne $suppress } @navs;
3330         }
3331
3332         my %arg = map { $_ => {action=>$_} } @navs;
3333         if (defined $head) {
3334                 for (qw(commit commitdiff)) {
3335                         $arg{$_}{'hash'} = $head;
3336                 }
3337                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3338                         for (qw(shortlog log)) {
3339                                 $arg{$_}{'hash'} = $head;
3340                         }
3341                 }
3342         }
3343
3344         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3345         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3346
3347         my @actions = gitweb_get_feature('actions');
3348         my %repl = (
3349                 '%' => '%',
3350                 'n' => $project,         # project name
3351                 'f' => $git_dir,         # project path within filesystem
3352                 'h' => $treehead || '',  # current hash ('h' parameter)
3353                 'b' => $treebase || '',  # hash base ('hb' parameter)
3354         );
3355         while (@actions) {
3356                 my ($label, $link, $pos) = splice(@actions,0,3);
3357                 # insert
3358                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3359                 # munch munch
3360                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3361                 $arg{$label}{'_href'} = $link;
3362         }
3363
3364         print "<div class=\"page_nav\">\n" .
3365                 (join " | ",
3366                  map { $_ eq $current ?
3367                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3368                  } @navs);
3369         print "<br/>\n$extra<br/>\n" .
3370               "</div>\n";
3371 }
3372
3373 sub format_paging_nav {
3374         my ($action, $hash, $head, $page, $has_next_link) = @_;
3375         my $paging_nav;
3376
3377
3378         if ($hash ne $head || $page) {
3379                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3380         } else {
3381                 $paging_nav .= "HEAD";
3382         }
3383
3384         if ($page > 0) {
3385                 $paging_nav .= " &sdot; " .
3386                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3387                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3388         } else {
3389                 $paging_nav .= " &sdot; prev";
3390         }
3391
3392         if ($has_next_link) {
3393                 $paging_nav .= " &sdot; " .
3394                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3395                                  -accesskey => "n", -title => "Alt-n"}, "next");
3396         } else {
3397                 $paging_nav .= " &sdot; next";
3398         }
3399
3400         return $paging_nav;
3401 }
3402
3403 ## ......................................................................
3404 ## functions printing or outputting HTML: div
3405
3406 sub git_print_header_div {
3407         my ($action, $title, $hash, $hash_base) = @_;
3408         my %args = ();
3409
3410         $args{'action'} = $action;
3411         $args{'hash'} = $hash if $hash;
3412         $args{'hash_base'} = $hash_base if $hash_base;
3413
3414         print "<div class=\"header\">\n" .
3415               $cgi->a({-href => href(%args), -class => "title"},
3416               $title ? $title : $action) .
3417               "\n</div>\n";
3418 }
3419
3420 sub print_local_time {
3421         my %date = @_;
3422         if ($date{'hour_local'} < 6) {
3423                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3424                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3425         } else {
3426                 printf(" (%02d:%02d %s)",
3427                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3428         }
3429 }
3430
3431 # Outputs the author name and date in long form
3432 sub git_print_authorship {
3433         my $co = shift;
3434         my %opts = @_;
3435         my $tag = $opts{-tag} || 'div';
3436         my $author = $co->{'author_name'};
3437
3438         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3439         print "<$tag class=\"author_date\">" .
3440               format_search_author($author, "author", esc_html($author)) .
3441               " [$ad{'rfc2822'}";
3442         print_local_time(%ad) if ($opts{-localtime});
3443         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3444                   . "</$tag>\n";
3445 }
3446
3447 # Outputs table rows containing the full author or committer information,
3448 # in the format expected for 'commit' view (& similia).
3449 # Parameters are a commit hash reference, followed by the list of people
3450 # to output information for. If the list is empty it defalts to both
3451 # author and committer.
3452 sub git_print_authorship_rows {
3453         my $co = shift;
3454         # too bad we can't use @people = @_ || ('author', 'committer')
3455         my @people = @_;
3456         @people = ('author', 'committer') unless @people;
3457         foreach my $who (@people) {
3458                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3459                 print "<tr><td>$who</td><td>" .
3460                       format_search_author($co->{"${who}_name"}, $who,
3461                                esc_html($co->{"${who}_name"})) . " " .
3462                       format_search_author($co->{"${who}_email"}, $who,
3463                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3464                       "</td><td rowspan=\"2\">" .
3465                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3466                       "</td></tr>\n" .
3467                       "<tr>" .
3468                       "<td></td><td> $wd{'rfc2822'}";
3469                 print_local_time(%wd);
3470                 print "</td>" .
3471                       "</tr>\n";
3472         }
3473 }
3474
3475 sub git_print_page_path {
3476         my $name = shift;
3477         my $type = shift;
3478         my $hb = shift;
3479
3480
3481         print "<div class=\"page_path\">";
3482         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3483                       -title => 'tree root'}, to_utf8("[$project]"));
3484         print " / ";
3485         if (defined $name) {
3486                 my @dirname = split '/', $name;
3487                 my $basename = pop @dirname;
3488                 my $fullname = '';
3489
3490                 foreach my $dir (@dirname) {
3491                         $fullname .= ($fullname ? '/' : '') . $dir;
3492                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3493                                                      hash_base=>$hb),
3494                                       -title => $fullname}, esc_path($dir));
3495                         print " / ";
3496                 }
3497                 if (defined $type && $type eq 'blob') {
3498                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3499                                                      hash_base=>$hb),
3500                                       -title => $name}, esc_path($basename));
3501                 } elsif (defined $type && $type eq 'tree') {
3502                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3503                                                      hash_base=>$hb),
3504                                       -title => $name}, esc_path($basename));
3505                         print " / ";
3506                 } else {
3507                         print esc_path($basename);
3508                 }
3509         }
3510         print "<br/></div>\n";
3511 }
3512
3513 sub git_print_log {
3514         my $log = shift;
3515         my %opts = @_;
3516
3517         if ($opts{'-remove_title'}) {
3518                 # remove title, i.e. first line of log
3519                 shift @$log;
3520         }
3521         # remove leading empty lines
3522         while (defined $log->[0] && $log->[0] eq "") {
3523                 shift @$log;
3524         }
3525
3526         # print log
3527         my $signoff = 0;
3528         my $empty = 0;
3529         foreach my $line (@$log) {
3530                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3531                         $signoff = 1;
3532                         $empty = 0;
3533                         if (! $opts{'-remove_signoff'}) {
3534                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3535                                 next;
3536                         } else {
3537                                 # remove signoff lines
3538                                 next;
3539                         }
3540                 } else {
3541                         $signoff = 0;
3542                 }
3543
3544                 # print only one empty line
3545                 # do not print empty line after signoff
3546                 if ($line eq "") {
3547                         next if ($empty || $signoff);
3548                         $empty = 1;
3549                 } else {
3550                         $empty = 0;
3551                 }
3552
3553                 print format_log_line_html($line) . "<br/>\n";
3554         }
3555
3556         if ($opts{'-final_empty_line'}) {
3557                 # end with single empty line
3558                 print "<br/>\n" unless $empty;
3559         }
3560 }
3561
3562 # return link target (what link points to)
3563 sub git_get_link_target {
3564         my $hash = shift;
3565         my $link_target;
3566
3567         # read link
3568         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3569                 or return;
3570         {
3571                 local $/ = undef;
3572                 $link_target = <$fd>;
3573         }
3574         close $fd
3575                 or return;
3576
3577         return $link_target;
3578 }
3579
3580 # given link target, and the directory (basedir) the link is in,
3581 # return target of link relative to top directory (top tree);
3582 # return undef if it is not possible (including absolute links).
3583 sub normalize_link_target {
3584         my ($link_target, $basedir) = @_;
3585
3586         # absolute symlinks (beginning with '/') cannot be normalized
3587         return if (substr($link_target, 0, 1) eq '/');
3588
3589         # normalize link target to path from top (root) tree (dir)
3590         my $path;
3591         if ($basedir) {
3592                 $path = $basedir . '/' . $link_target;
3593         } else {
3594                 # we are in top (root) tree (dir)
3595                 $path = $link_target;
3596         }
3597
3598         # remove //, /./, and /../
3599         my @path_parts;
3600         foreach my $part (split('/', $path)) {
3601                 # discard '.' and ''
3602                 next if (!$part || $part eq '.');
3603                 # handle '..'
3604                 if ($part eq '..') {
3605                         if (@path_parts) {
3606                                 pop @path_parts;
3607                         } else {
3608                                 # link leads outside repository (outside top dir)
3609                                 return;
3610                         }
3611                 } else {
3612                         push @path_parts, $part;
3613                 }
3614         }
3615         $path = join('/', @path_parts);
3616
3617         return $path;
3618 }
3619
3620 # print tree entry (row of git_tree), but without encompassing <tr> element
3621 sub git_print_tree_entry {
3622         my ($t, $basedir, $hash_base, $have_blame) = @_;
3623
3624         my %base_key = ();
3625         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3626
3627         # The format of a table row is: mode list link.  Where mode is
3628         # the mode of the entry, list is the name of the entry, an href,
3629         # and link is the action links of the entry.
3630
3631         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3632         if (exists $t->{'size'}) {
3633                 print "<td class=\"size\">$t->{'size'}</td>\n";
3634         }
3635         if ($t->{'type'} eq "blob") {
3636                 print "<td class=\"list\">" .
3637                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3638                                                file_name=>"$basedir$t->{'name'}", %base_key),
3639                                 -class => "list"}, esc_path($t->{'name'}));
3640                 if (S_ISLNK(oct $t->{'mode'})) {
3641                         my $link_target = git_get_link_target($t->{'hash'});
3642                         if ($link_target) {
3643                                 my $norm_target = normalize_link_target($link_target, $basedir);
3644                                 if (defined $norm_target) {
3645                                         print " -> " .
3646                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3647                                                                      file_name=>$norm_target),
3648                                                        -title => $norm_target}, esc_path($link_target));
3649                                 } else {
3650                                         print " -> " . esc_path($link_target);
3651                                 }
3652                         }
3653                 }
3654                 print "</td>\n";
3655                 print "<td class=\"link\">";
3656                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3657                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3658                               "blob");
3659                 if ($have_blame) {
3660                         print " | " .
3661                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3662                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3663                                       "blame");
3664                 }
3665                 if (defined $hash_base) {
3666                         print " | " .
3667                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3668                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3669                                       "history");
3670                 }
3671                 print " | " .
3672                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3673                                                file_name=>"$basedir$t->{'name'}")},
3674                                 "raw");
3675                 print "</td>\n";
3676
3677         } elsif ($t->{'type'} eq "tree") {
3678                 print "<td class=\"list\">";
3679                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3680                                              file_name=>"$basedir$t->{'name'}",
3681                                              %base_key)},
3682                               esc_path($t->{'name'}));
3683                 print "</td>\n";
3684                 print "<td class=\"link\">";
3685                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3686                                              file_name=>"$basedir$t->{'name'}",
3687                                              %base_key)},
3688                               "tree");
3689                 if (defined $hash_base) {
3690                         print " | " .
3691                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3692                                                      file_name=>"$basedir$t->{'name'}")},
3693                                       "history");
3694                 }
3695                 print "</td>\n";
3696         } else {
3697                 # unknown object: we can only present history for it
3698                 # (this includes 'commit' object, i.e. submodule support)
3699                 print "<td class=\"list\">" .
3700                       esc_path($t->{'name'}) .
3701                       "</td>\n";
3702                 print "<td class=\"link\">";
3703                 if (defined $hash_base) {
3704                         print $cgi->a({-href => href(action=>"history",
3705                                                      hash_base=>$hash_base,
3706                                                      file_name=>"$basedir$t->{'name'}")},
3707                                       "history");
3708                 }
3709                 print "</td>\n";
3710         }
3711 }
3712
3713 ## ......................................................................
3714 ## functions printing large fragments of HTML
3715
3716 # get pre-image filenames for merge (combined) diff
3717 sub fill_from_file_info {
3718         my ($diff, @parents) = @_;
3719
3720         $diff->{'from_file'} = [ ];
3721         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3722         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3723                 if ($diff->{'status'}[$i] eq 'R' ||
3724                     $diff->{'status'}[$i] eq 'C') {
3725                         $diff->{'from_file'}[$i] =
3726                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3727                 }
3728         }
3729
3730         return $diff;
3731 }
3732
3733 # is current raw difftree line of file deletion
3734 sub is_deleted {
3735         my $diffinfo = shift;
3736
3737         return $diffinfo->{'to_id'} eq ('0' x 40);
3738 }
3739
3740 # does patch correspond to [previous] difftree raw line
3741 # $diffinfo  - hashref of parsed raw diff format
3742 # $patchinfo - hashref of parsed patch diff format
3743 #              (the same keys as in $diffinfo)
3744 sub is_patch_split {
3745         my ($diffinfo, $patchinfo) = @_;
3746
3747         return defined $diffinfo && defined $patchinfo
3748                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3749 }
3750
3751
3752 sub git_difftree_body {
3753         my ($difftree, $hash, @parents) = @_;
3754         my ($parent) = $parents[0];
3755         my $have_blame = gitweb_check_feature('blame');
3756         print "<div class=\"list_head\">\n";
3757         if ($#{$difftree} > 10) {
3758                 print(($#{$difftree} + 1) . " files changed:\n");
3759         }
3760         print "</div>\n";
3761
3762         print "<table class=\"" .
3763               (@parents > 1 ? "combined " : "") .
3764               "diff_tree\">\n";
3765
3766         # header only for combined diff in 'commitdiff' view
3767         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3768         if ($has_header) {
3769                 # table header
3770                 print "<thead><tr>\n" .
3771                        "<th></th><th></th>\n"; # filename, patchN link
3772                 for (my $i = 0; $i < @parents; $i++) {
3773                         my $par = $parents[$i];
3774                         print "<th>" .
3775                               $cgi->a({-href => href(action=>"commitdiff",
3776                                                      hash=>$hash, hash_parent=>$par),
3777                                        -title => 'commitdiff to parent number ' .
3778                                                   ($i+1) . ': ' . substr($par,0,7)},
3779                                       $i+1) .
3780                               "&nbsp;</th>\n";
3781                 }
3782                 print "</tr></thead>\n<tbody>\n";
3783         }
3784
3785         my $alternate = 1;
3786         my $patchno = 0;
3787         foreach my $line (@{$difftree}) {
3788                 my $diff = parsed_difftree_line($line);
3789
3790                 if ($alternate) {
3791                         print "<tr class=\"dark\">\n";
3792                 } else {
3793                         print "<tr class=\"light\">\n";
3794                 }
3795                 $alternate ^= 1;
3796
3797                 if (exists $diff->{'nparents'}) { # combined diff
3798
3799                         fill_from_file_info($diff, @parents)
3800                                 unless exists $diff->{'from_file'};
3801
3802                         if (!is_deleted($diff)) {
3803                                 # file exists in the result (child) commit
3804                                 print "<td>" .
3805                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3806                                                              file_name=>$diff->{'to_file'},
3807                                                              hash_base=>$hash),
3808                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3809                                       "</td>\n";
3810                         } else {
3811                                 print "<td>" .
3812                                       esc_path($diff->{'to_file'}) .
3813                                       "</td>\n";
3814                         }
3815
3816                         if ($action eq 'commitdiff') {
3817                                 # link to patch
3818                                 $patchno++;
3819                                 print "<td class=\"link\">" .
3820                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3821                                       " | " .
3822                                       "</td>\n";
3823                         }
3824
3825                         my $has_history = 0;
3826                         my $not_deleted = 0;
3827                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3828                                 my $hash_parent = $parents[$i];
3829                                 my $from_hash = $diff->{'from_id'}[$i];
3830                                 my $from_path = $diff->{'from_file'}[$i];
3831                                 my $status = $diff->{'status'}[$i];
3832
3833                                 $has_history ||= ($status ne 'A');
3834                                 $not_deleted ||= ($status ne 'D');
3835
3836                                 if ($status eq 'A') {
3837                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3838                                 } elsif ($status eq 'D') {
3839                                         print "<td class=\"link\">" .
3840                                               $cgi->a({-href => href(action=>"blob",
3841                                                                      hash_base=>$hash,
3842                                                                      hash=>$from_hash,
3843                                                                      file_name=>$from_path)},
3844                                                       "blob" . ($i+1)) .
3845                                               " | </td>\n";
3846                                 } else {
3847                                         if ($diff->{'to_id'} eq $from_hash) {
3848                                                 print "<td class=\"link nochange\">";
3849                                         } else {
3850                                                 print "<td class=\"link\">";
3851                                         }
3852                                         print $cgi->a({-href => href(action=>"blobdiff",
3853                                                                      hash=>$diff->{'to_id'},
3854                                                                      hash_parent=>$from_hash,
3855                                                                      hash_base=>$hash,
3856                                                                      hash_parent_base=>$hash_parent,
3857                                                                      file_name=>$diff->{'to_file'},
3858                                                                      file_parent=>$from_path)},
3859                                                       "diff" . ($i+1)) .
3860                                               " | </td>\n";
3861                                 }
3862                         }
3863
3864                         print "<td class=\"link\">";
3865                         if ($not_deleted) {
3866                                 print $cgi->a({-href => href(action=>"blob",
3867                                                              hash=>$diff->{'to_id'},
3868                                                              file_name=>$diff->{'to_file'},
3869                                                              hash_base=>$hash)},
3870                                               "blob");
3871                                 print " | " if ($has_history);
3872                         }
3873                         if ($has_history) {
3874                                 print $cgi->a({-href => href(action=>"history",
3875                                                              file_name=>$diff->{'to_file'},
3876                                                              hash_base=>$hash)},
3877                                               "history");
3878                         }
3879                         print "</td>\n";
3880
3881                         print "</tr>\n";
3882                         next; # instead of 'else' clause, to avoid extra indent
3883                 }
3884                 # else ordinary diff
3885
3886                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3887                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3888                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3889                         $to_mode_oct = oct $diff->{'to_mode'};
3890                         if (S_ISREG($to_mode_oct)) { # only for regular file
3891                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3892                         }
3893                         $to_file_type = file_type($diff->{'to_mode'});
3894                 }
3895                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3896                         $from_mode_oct = oct $diff->{'from_mode'};
3897                         if (S_ISREG($to_mode_oct)) { # only for regular file
3898                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3899                         }
3900                         $from_file_type = file_type($diff->{'from_mode'});
3901                 }
3902
3903                 if ($diff->{'status'} eq "A") { # created
3904                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3905                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3906                         $mode_chng   .= "]</span>";
3907                         print "<td>";
3908                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3909                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3910                                       -class => "list"}, esc_path($diff->{'file'}));
3911                         print "</td>\n";
3912                         print "<td>$mode_chng</td>\n";
3913                         print "<td class=\"link\">";
3914                         if ($action eq 'commitdiff') {
3915                                 # link to patch
3916                                 $patchno++;
3917                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3918                                 print " | ";
3919                         }
3920                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3921                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3922                                       "blob");
3923                         print "</td>\n";
3924
3925                 } elsif ($diff->{'status'} eq "D") { # deleted
3926                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3927                         print "<td>";
3928                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3929                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3930                                        -class => "list"}, esc_path($diff->{'file'}));
3931                         print "</td>\n";
3932                         print "<td>$mode_chng</td>\n";
3933                         print "<td class=\"link\">";
3934                         if ($action eq 'commitdiff') {
3935                                 # link to patch
3936                                 $patchno++;
3937                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3938                                 print " | ";
3939                         }
3940                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3941                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3942                                       "blob") . " | ";
3943                         if ($have_blame) {
3944                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3945                                                              file_name=>$diff->{'file'})},
3946                                               "blame") . " | ";
3947                         }
3948                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3949                                                      file_name=>$diff->{'file'})},
3950                                       "history");
3951                         print "</td>\n";
3952
3953                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3954                         my $mode_chnge = "";
3955                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3956                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3957                                 if ($from_file_type ne $to_file_type) {
3958                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3959                                 }
3960                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3961                                         if ($from_mode_str && $to_mode_str) {
3962                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3963                                         } elsif ($to_mode_str) {
3964                                                 $mode_chnge .= " mode: $to_mode_str";
3965                                         }
3966                                 }
3967                                 $mode_chnge .= "]</span>\n";
3968                         }
3969                         print "<td>";
3970                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3971                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3972                                       -class => "list"}, esc_path($diff->{'file'}));
3973                         print "</td>\n";
3974                         print "<td>$mode_chnge</td>\n";
3975                         print "<td class=\"link\">";
3976                         if ($action eq 'commitdiff') {
3977                                 # link to patch
3978                                 $patchno++;
3979                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3980                                       " | ";
3981                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3982                                 # "commit" view and modified file (not onlu mode changed)
3983                                 print $cgi->a({-href => href(action=>"blobdiff",
3984                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3985                                                              hash_base=>$hash, hash_parent_base=>$parent,
3986                                                              file_name=>$diff->{'file'})},
3987                                               "diff") .
3988                                       " | ";
3989                         }
3990                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3991                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3992                                        "blob") . " | ";
3993                         if ($have_blame) {
3994                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3995                                                              file_name=>$diff->{'file'})},
3996                                               "blame") . " | ";
3997                         }
3998                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3999                                                      file_name=>$diff->{'file'})},
4000                                       "history");
4001                         print "</td>\n";
4002
4003                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4004                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4005                         my $nstatus = $status_name{$diff->{'status'}};
4006                         my $mode_chng = "";
4007                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4008                                 # mode also for directories, so we cannot use $to_mode_str
4009                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4010                         }
4011                         print "<td>" .
4012                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4013                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4014                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4015                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4016                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4017                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4018                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4019                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4020                               "<td class=\"link\">";
4021                         if ($action eq 'commitdiff') {
4022                                 # link to patch
4023                                 $patchno++;
4024                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4025                                       " | ";
4026                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4027                                 # "commit" view and modified file (not only pure rename or copy)
4028                                 print $cgi->a({-href => href(action=>"blobdiff",
4029                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4030                                                              hash_base=>$hash, hash_parent_base=>$parent,
4031                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4032                                               "diff") .
4033                                       " | ";
4034                         }
4035                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4036                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4037                                       "blob") . " | ";
4038                         if ($have_blame) {
4039                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4040                                                              file_name=>$diff->{'to_file'})},
4041                                               "blame") . " | ";
4042                         }
4043                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4044                                                     file_name=>$diff->{'to_file'})},
4045                                       "history");
4046                         print "</td>\n";
4047
4048                 } # we should not encounter Unmerged (U) or Unknown (X) status
4049                 print "</tr>\n";
4050         }
4051         print "</tbody>" if $has_header;
4052         print "</table>\n";
4053 }
4054
4055 sub git_patchset_body {
4056         my ($fd, $difftree, $hash, @hash_parents) = @_;
4057         my ($hash_parent) = $hash_parents[0];
4058
4059         my $is_combined = (@hash_parents > 1);
4060         my $patch_idx = 0;
4061         my $patch_number = 0;
4062         my $patch_line;
4063         my $diffinfo;
4064         my $to_name;
4065         my (%from, %to);
4066
4067         print "<div class=\"patchset\">\n";
4068
4069         # skip to first patch
4070         while ($patch_line = <$fd>) {
4071                 chomp $patch_line;
4072
4073                 last if ($patch_line =~ m/^diff /);
4074         }
4075
4076  PATCH:
4077         while ($patch_line) {
4078
4079                 # parse "git diff" header line
4080                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4081                         # $1 is from_name, which we do not use
4082                         $to_name = unquote($2);
4083                         $to_name =~ s!^b/!!;
4084                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4085                         # $1 is 'cc' or 'combined', which we do not use
4086                         $to_name = unquote($2);
4087                 } else {
4088                         $to_name = undef;
4089                 }
4090
4091                 # check if current patch belong to current raw line
4092                 # and parse raw git-diff line if needed
4093                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4094                         # this is continuation of a split patch
4095                         print "<div class=\"patch cont\">\n";
4096                 } else {
4097                         # advance raw git-diff output if needed
4098                         $patch_idx++ if defined $diffinfo;
4099
4100                         # read and prepare patch information
4101                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4102
4103                         # compact combined diff output can have some patches skipped
4104                         # find which patch (using pathname of result) we are at now;
4105                         if ($is_combined) {
4106                                 while ($to_name ne $diffinfo->{'to_file'}) {
4107                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4108                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4109                                               "</div>\n";  # class="patch"
4110
4111                                         $patch_idx++;
4112                                         $patch_number++;
4113
4114                                         last if $patch_idx > $#$difftree;
4115                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4116                                 }
4117                         }
4118
4119                         # modifies %from, %to hashes
4120                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4121
4122                         # this is first patch for raw difftree line with $patch_idx index
4123                         # we index @$difftree array from 0, but number patches from 1
4124                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4125                 }
4126
4127                 # git diff header
4128                 #assert($patch_line =~ m/^diff /) if DEBUG;
4129                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4130                 $patch_number++;
4131                 # print "git diff" header
4132                 print format_git_diff_header_line($patch_line, $diffinfo,
4133                                                   \%from, \%to);
4134
4135                 # print extended diff header
4136                 print "<div class=\"diff extended_header\">\n";
4137         EXTENDED_HEADER:
4138                 while ($patch_line = <$fd>) {
4139                         chomp $patch_line;
4140
4141                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4142
4143                         print format_extended_diff_header_line($patch_line, $diffinfo,
4144                                                                \%from, \%to);
4145                 }
4146                 print "</div>\n"; # class="diff extended_header"
4147
4148                 # from-file/to-file diff header
4149                 if (! $patch_line) {
4150                         print "</div>\n"; # class="patch"
4151                         last PATCH;
4152                 }
4153                 next PATCH if ($patch_line =~ m/^diff /);
4154                 #assert($patch_line =~ m/^---/) if DEBUG;
4155
4156                 my $last_patch_line = $patch_line;
4157                 $patch_line = <$fd>;
4158                 chomp $patch_line;
4159                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4160
4161                 print format_diff_from_to_header($last_patch_line, $patch_line,
4162                                                  $diffinfo, \%from, \%to,
4163                                                  @hash_parents);
4164
4165                 # the patch itself
4166         LINE:
4167                 while ($patch_line = <$fd>) {
4168                         chomp $patch_line;
4169
4170                         next PATCH if ($patch_line =~ m/^diff /);
4171
4172                         print format_diff_line($patch_line, \%from, \%to);
4173                 }
4174
4175         } continue {
4176                 print "</div>\n"; # class="patch"
4177         }
4178
4179         # for compact combined (--cc) format, with chunk and patch simpliciaction
4180         # patchset might be empty, but there might be unprocessed raw lines
4181         for (++$patch_idx if $patch_number > 0;
4182              $patch_idx < @$difftree;
4183              ++$patch_idx) {
4184                 # read and prepare patch information
4185                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4186
4187                 # generate anchor for "patch" links in difftree / whatchanged part
4188                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4189                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4190                       "</div>\n";  # class="patch"
4191
4192                 $patch_number++;
4193         }
4194
4195         if ($patch_number == 0) {
4196                 if (@hash_parents > 1) {
4197                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4198                 } else {
4199                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4200                 }
4201         }
4202
4203         print "</div>\n"; # class="patchset"
4204 }
4205
4206 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4207
4208 # fills project list info (age, description, owner, forks) for each
4209 # project in the list, removing invalid projects from returned list
4210 # NOTE: modifies $projlist, but does not remove entries from it
4211 sub fill_project_list_info {
4212         my ($projlist, $check_forks, $show_ctags) = @_;
4213         my @projects;
4214
4215  PROJECT:
4216         foreach my $pr (@$projlist) {
4217                 my (@activity) = git_get_last_activity($pr->{'path'});
4218                 unless (@activity) {
4219                         next PROJECT;
4220                 }
4221                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4222                 if (!defined $pr->{'descr'}) {
4223                         my $descr = git_get_project_description($pr->{'path'}) || "";
4224                         $descr = to_utf8($descr);
4225                         $pr->{'descr_long'} = $descr;
4226                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4227                 }
4228                 if (!defined $pr->{'owner'}) {
4229                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4230                 }
4231                 if ($check_forks) {
4232                         my $pname = $pr->{'path'};
4233                         if (($pname =~ s/\.git$//) &&
4234                             ($pname !~ /\/$/) &&
4235                             (-d "$projectroot/$pname")) {
4236                                 $pr->{'forks'} = "-d $projectroot/$pname";
4237                         } else {
4238                                 $pr->{'forks'} = 0;
4239                         }
4240                 }
4241                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4242                 push @projects, $pr;
4243         }
4244
4245         return @projects;
4246 }
4247
4248 # print 'sort by' <th> element, generating 'sort by $name' replay link
4249 # if that order is not selected
4250 sub print_sort_th {
4251         my ($name, $order, $header) = @_;
4252         $header ||= ucfirst($name);
4253
4254         if ($order eq $name) {
4255                 print "<th>$header</th>\n";
4256         } else {
4257                 print "<th>" .
4258                       $cgi->a({-href => href(-replay=>1, order=>$name),
4259                                -class => "header"}, $header) .
4260                       "</th>\n";
4261         }
4262 }
4263
4264 sub git_project_list_ctags {
4265         my ($projects) = @_;
4266
4267         my %ctags;
4268         foreach my $p (@$projects) {
4269                 foreach my $ct (keys %{$p->{'ctags'}}) {
4270                         $ctags{$ct} += $p->{'ctags'}->{$ct};
4271                 }
4272         }
4273         my $cloud = git_populate_project_tagcloud(\%ctags);
4274         print git_show_project_tagcloud($cloud, 64);
4275 }
4276
4277 sub git_project_list_body {
4278         # actually uses global variable $project
4279         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4280
4281         my $check_forks = gitweb_check_feature('forks');
4282         my $show_ctags = gitweb_check_feature('ctags');
4283         my @projects = fill_project_list_info($projlist, $check_forks);
4284
4285         $order ||= $default_projects_order;
4286         $from = 0 unless defined $from;
4287         $to = $#projects if (!defined $to || $#projects < $to);
4288
4289         my %order_info = (
4290                 project => { key => 'path', type => 'str' },
4291                 descr => { key => 'descr_long', type => 'str' },
4292                 owner => { key => 'owner', type => 'str' },
4293                 age => { key => 'age', type => 'num' }
4294         );
4295         my $oi = $order_info{$order};
4296         if ($oi->{'type'} eq 'str') {
4297                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4298         } else {
4299                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4300         }
4301
4302         if ($show_ctags) {
4303                 git_project_list_ctags(\@projects);
4304         }
4305
4306         print "<table class=\"project_list\">\n";
4307         unless ($no_header) {
4308                 print "<tr>\n";
4309                 if ($check_forks) {
4310                         print "<th></th>\n";
4311                 }
4312                 print_sort_th('project', $order, 'Project');
4313                 print_sort_th('descr', $order, 'Description');
4314                 print_sort_th('owner', $order, 'Owner');
4315                 print_sort_th('age', $order, 'Last Change');
4316                 print "<th></th>\n" . # for links
4317                       "</tr>\n";
4318         }
4319         my $alternate = 1;
4320         my $tagfilter = $cgi->param('by_tag');
4321         for (my $i = $from; $i <= $to; $i++) {
4322                 my $pr = $projects[$i];
4323
4324                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4325                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4326                         and not $pr->{'descr_long'} =~ /$searchtext/;
4327                 # Weed out forks or non-matching entries of search
4328                 if ($check_forks) {
4329                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4330                         $forkbase="^$forkbase" if $forkbase;
4331                         next if not $searchtext and not $tagfilter and $show_ctags
4332                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4333                 }
4334
4335                 if ($alternate) {
4336                         print "<tr class=\"dark\">\n";
4337                 } else {
4338                         print "<tr class=\"light\">\n";
4339                 }
4340                 $alternate ^= 1;
4341                 if ($check_forks) {
4342                         print "<td>";
4343                         if ($pr->{'forks'}) {
4344                                 print "<!-- $pr->{'forks'} -->\n";
4345                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4346                         }
4347                         print "</td>\n";
4348                 }
4349                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4350                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4351                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4352                                         -class => "list", -title => $pr->{'descr_long'}},
4353                                         esc_html($pr->{'descr'})) . "</td>\n" .
4354                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4355                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4356                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4357                       "<td class=\"link\">" .
4358                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4359                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4360                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4361                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4362                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4363                       "</td>\n" .
4364                       "</tr>\n";
4365         }
4366         if (defined $extra) {
4367                 print "<tr>\n";
4368                 if ($check_forks) {
4369                         print "<td></td>\n";
4370                 }
4371                 print "<td colspan=\"5\">$extra</td>\n" .
4372                       "</tr>\n";
4373         }
4374         print "</table>\n";
4375 }
4376
4377 sub git_project_search_form {
4378         print $cgi->startform(-method => "get") .
4379               $cgi->hidden({-name=>"a", -value=>"project_list"}) . "\n" .
4380               "<p class=\"projsearch\">Search:\n" .
4381               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4382               "</p>" .
4383               $cgi->end_form() . "\n";
4384 }
4385
4386 sub git_project_list_all {
4387         my $order = $input_params{'order'};
4388         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4389                 die_error(400, "Unknown order parameter");
4390         }
4391
4392         my @list = git_get_projects_list();
4393         if (!@list) {
4394                 die_error(404, "No projects found");
4395         }
4396
4397         git_project_list_body(\@list, $order, undef, undef, undef, undef, $projlist_cache_lifetime);
4398 }
4399
4400 sub git_shortlog_body {
4401         # uses global variable $project
4402         my ($commitlist, $from, $to, $refs, $extra) = @_;
4403
4404         $from = 0 unless defined $from;
4405         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4406
4407         print "<table class=\"shortlog\">\n";
4408         my $alternate = 1;
4409         for (my $i = $from; $i <= $to; $i++) {
4410                 my %co = %{$commitlist->[$i]};
4411                 my $commit = $co{'id'};
4412                 my $ref = format_ref_marker($refs, $commit);
4413                 if ($alternate) {
4414                         print "<tr class=\"dark\">\n";
4415                 } else {
4416                         print "<tr class=\"light\">\n";
4417                 }
4418                 $alternate ^= 1;
4419                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4420                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4421                       format_author_html('td', \%co, 10) . "<td>";
4422                 print format_subject_html($co{'title'}, $co{'title_short'},
4423                                           href(action=>"commit", hash=>$commit), $ref);
4424                 print "</td>\n" .
4425                       "<td class=\"link\">" .
4426                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4427                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4428                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4429                 my $snapshot_links = format_snapshot_links($commit);
4430                 if (defined $snapshot_links) {
4431                         print " | " . $snapshot_links;
4432                 }
4433                 print "</td>\n" .
4434                       "</tr>\n";
4435         }
4436         if (defined $extra) {
4437                 print "<tr>\n" .
4438                       "<td colspan=\"4\">$extra</td>\n" .
4439                       "</tr>\n";
4440         }
4441         print "</table>\n";
4442 }
4443
4444 sub git_history_body {
4445         # Warning: assumes constant type (blob or tree) during history
4446         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4447
4448         $from = 0 unless defined $from;
4449         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4450
4451         print "<table class=\"history\">\n";
4452         my $alternate = 1;
4453         for (my $i = $from; $i <= $to; $i++) {
4454                 my %co = %{$commitlist->[$i]};
4455                 if (!%co) {
4456                         next;
4457                 }
4458                 my $commit = $co{'id'};
4459
4460                 my $ref = format_ref_marker($refs, $commit);
4461
4462                 if ($alternate) {
4463                         print "<tr class=\"dark\">\n";
4464                 } else {
4465                         print "<tr class=\"light\">\n";
4466                 }
4467                 $alternate ^= 1;
4468                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4469         # shortlog:   format_author_html('td', \%co, 10)
4470                       format_author_html('td', \%co, 15, 3) . "<td>";
4471                 # originally git_history used chop_str($co{'title'}, 50)
4472                 print format_subject_html($co{'title'}, $co{'title_short'},
4473                                           href(action=>"commit", hash=>$commit), $ref);
4474                 print "</td>\n" .
4475                       "<td class=\"link\">" .
4476                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4477                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4478
4479                 if ($ftype eq 'blob') {
4480                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4481                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4482                         if (defined $blob_current && defined $blob_parent &&
4483                                         $blob_current ne $blob_parent) {
4484                                 print " | " .
4485                                         $cgi->a({-href => href(action=>"blobdiff",
4486                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4487                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4488                                                                file_name=>$file_name)},
4489                                                 "diff to current");
4490                         }
4491                 }
4492                 print "</td>\n" .
4493                       "</tr>\n";
4494         }
4495         if (defined $extra) {
4496                 print "<tr>\n" .
4497                       "<td colspan=\"4\">$extra</td>\n" .
4498                       "</tr>\n";
4499         }
4500         print "</table>\n";
4501 }
4502
4503 sub git_tags_body {
4504         # uses global variable $project
4505         my ($taglist, $from, $to, $extra) = @_;
4506         $from = 0 unless defined $from;
4507         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4508
4509         print "<table class=\"tags\">\n";
4510         my $alternate = 1;
4511         for (my $i = $from; $i <= $to; $i++) {
4512                 my $entry = $taglist->[$i];
4513                 my %tag = %$entry;
4514                 my $comment = $tag{'subject'};
4515                 my $comment_short;
4516                 if (defined $comment) {
4517                         $comment_short = chop_str($comment, 30, 5);
4518                 }
4519                 if ($alternate) {
4520                         print "<tr class=\"dark\">\n";
4521                 } else {
4522                         print "<tr class=\"light\">\n";
4523                 }
4524                 $alternate ^= 1;
4525                 if (defined $tag{'age'}) {
4526                         print "<td><i>$tag{'age'}</i></td>\n";
4527                 } else {
4528                         print "<td></td>\n";
4529                 }
4530                 print "<td>" .
4531                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4532                                -class => "list name"}, esc_html($tag{'name'})) .
4533                       "</td>\n" .
4534                       "<td>";
4535                 if (defined $comment) {
4536                         print format_subject_html($comment, $comment_short,
4537                                                   href(action=>"tag", hash=>$tag{'id'}));
4538                 }
4539                 print "</td>\n" .
4540                       "<td class=\"selflink\">";
4541                 if ($tag{'type'} eq "tag") {
4542                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4543                 } else {
4544                         print "&nbsp;";
4545                 }
4546                 print "</td>\n" .
4547                       "<td class=\"link\">" . " | " .
4548                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4549                 if ($tag{'reftype'} eq "commit") {
4550                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4551                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4552                 } elsif ($tag{'reftype'} eq "blob") {
4553                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4554                 }
4555                 print "</td>\n" .
4556                       "</tr>";
4557         }
4558         if (defined $extra) {
4559                 print "<tr>\n" .
4560                       "<td colspan=\"5\">$extra</td>\n" .
4561                       "</tr>\n";
4562         }
4563         print "</table>\n";
4564 }
4565
4566 sub git_heads_body {
4567         # uses global variable $project
4568         my ($headlist, $head, $from, $to, $extra) = @_;
4569         $from = 0 unless defined $from;
4570         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4571
4572         print "<table class=\"heads\">\n";
4573         my $alternate = 1;
4574         for (my $i = $from; $i <= $to; $i++) {
4575                 my $entry = $headlist->[$i];
4576                 my %ref = %$entry;
4577                 my $curr = $ref{'id'} eq $head;
4578                 if ($alternate) {
4579                         print "<tr class=\"dark\">\n";
4580                 } else {
4581                         print "<tr class=\"light\">\n";
4582                 }
4583                 $alternate ^= 1;
4584                 print "<td><i>$ref{'age'}</i></td>\n" .
4585                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4586                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4587                                -class => "list name"},esc_html($ref{'name'})) .
4588                       "</td>\n" .
4589                       "<td class=\"link\">" .
4590                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4591                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4592                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4593                       "</td>\n" .
4594                       "</tr>";
4595         }
4596         if (defined $extra) {
4597                 print "<tr>\n" .
4598                       "<td colspan=\"3\">$extra</td>\n" .
4599                       "</tr>\n";
4600         }
4601         print "</table>\n";
4602 }
4603
4604 sub git_search_grep_body {
4605         my ($commitlist, $from, $to, $extra) = @_;
4606         $from = 0 unless defined $from;
4607         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4608
4609         print "<table class=\"commit_search\">\n";
4610         my $alternate = 1;
4611         for (my $i = $from; $i <= $to; $i++) {
4612                 my %co = %{$commitlist->[$i]};
4613                 if (!%co) {
4614                         next;
4615                 }
4616                 my $commit = $co{'id'};
4617                 if ($alternate) {
4618                         print "<tr class=\"dark\">\n";
4619                 } else {
4620                         print "<tr class=\"light\">\n";
4621                 }
4622                 $alternate ^= 1;
4623                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4624                       format_author_html('td', \%co, 15, 5) .
4625                       "<td>" .
4626                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4627                                -class => "list subject"},
4628                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4629                 my $comment = $co{'comment'};
4630                 foreach my $line (@$comment) {
4631                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4632                                 my ($lead, $match, $trail) = ($1, $2, $3);
4633                                 $match = chop_str($match, 70, 5, 'center');
4634                                 my $contextlen = int((80 - length($match))/2);
4635                                 $contextlen = 30 if ($contextlen > 30);
4636                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4637                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4638
4639                                 $lead  = esc_html($lead);
4640                                 $match = esc_html($match);
4641                                 $trail = esc_html($trail);
4642
4643                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4644                         }
4645                 }
4646                 print "</td>\n" .
4647                       "<td class=\"link\">" .
4648                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4649                       " | " .
4650                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4651                       " | " .
4652                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4653                 print "</td>\n" .
4654                       "</tr>\n";
4655         }
4656         if (defined $extra) {
4657                 print "<tr>\n" .
4658                       "<td colspan=\"3\">$extra</td>\n" .
4659                       "</tr>\n";
4660         }
4661         print "</table>\n";
4662 }
4663
4664 ## ======================================================================
4665 ## ======================================================================
4666 ## actions
4667
4668 sub git_frontpage {
4669         git_header_html();
4670         if (-f $home_text) {
4671                 print "<div class=\"index_include\">\n";
4672                 insert_file($home_text);
4673                 print "</div>\n";
4674         }
4675         git_project_search_form();
4676         if (not $frontpage_no_project_list) {
4677                 git_project_list_all();
4678         } else {
4679                 my $show_ctags = gitweb_check_feature('ctags');
4680                 if ($frontpage_no_project_list == 1 and $show_ctags) {
4681                         my @list = git_get_projects_list();
4682                         my @projects = fill_project_list_info(\@list, gitweb_check_feature('forks'), $show_ctags);
4683                         git_project_list_ctags(\@projects);
4684                 }
4685                 print "<p class=\"projectlist_link\">" .
4686                         $cgi->a({-href => href(action=>'project_list')}, "Browse all projects") .
4687                         "</p>\n";
4688         }
4689         git_footer_html();
4690 }
4691
4692 sub git_project_list {
4693         git_header_html();
4694         git_project_search_form();
4695         git_project_list_all();
4696         git_footer_html();
4697 }
4698
4699 sub git_forks {
4700         my $order = $input_params{'order'};
4701         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4702                 die_error(400, "Unknown order parameter");
4703         }
4704
4705         my @list = git_get_projects_list($project);
4706         if (!@list) {
4707                 die_error(404, "No forks found");
4708         }
4709
4710         git_header_html();
4711         git_print_page_nav('','');
4712         git_print_header_div('summary', "$project forks");
4713         git_project_list_body(\@list, $order);
4714         git_footer_html();
4715 }
4716
4717 sub git_project_index {
4718         my @projects = git_get_projects_list($project);
4719
4720         print $cgi->header(
4721                 -type => 'text/plain',
4722                 -charset => 'utf-8',
4723                 -content_disposition => 'inline; filename="index.aux"');
4724
4725         foreach my $pr (@projects) {
4726                 if (!exists $pr->{'owner'}) {
4727                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4728                 }
4729
4730                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4731                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4732                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4733                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4734                 $path  =~ s/ /\+/g;
4735                 $owner =~ s/ /\+/g;
4736
4737                 print "$path $owner\n";
4738         }
4739 }
4740
4741 sub git_summary {
4742         my $descr = git_get_project_description($project) || "none";
4743         my %co = parse_commit("HEAD");
4744         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4745         my $head = $co{'id'};
4746
4747         my $owner = git_get_project_owner($project);
4748
4749         my $refs = git_get_references();
4750         # These get_*_list functions return one more to allow us to see if
4751         # there are more ...
4752         my @taglist  = git_get_tags_list(16);
4753         my @headlist = git_get_heads_list(16);
4754         my @forklist;
4755         my $check_forks = gitweb_check_feature('forks');
4756
4757         if ($check_forks) {
4758                 @forklist = git_get_projects_list($project);
4759         }
4760
4761         git_header_html();
4762         git_print_page_nav('summary','', $head);
4763
4764         print "<div class=\"title\">&nbsp;</div>\n";
4765         print "<table class=\"projects_list\">\n" .
4766               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4767               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4768         if (defined $cd{'rfc2822'}) {
4769                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4770         }
4771
4772         # use per project git URL list in $projectroot/$project/cloneurl
4773         # or make project git URL from git base URL and project name
4774         my $url_tag = "URL";
4775         my @url_list = git_get_project_url_list($project);
4776         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4777         foreach my $git_url (@url_list) {
4778                 next unless $git_url;
4779                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4780                 $url_tag = "";
4781         }
4782
4783         # Tag cloud
4784         my $show_ctags = gitweb_check_feature('ctags');
4785         if ($show_ctags) {
4786                 my $ctags = git_get_project_ctags($project);
4787                 my $cloud = git_populate_project_tagcloud($ctags);
4788                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4789                 print "</td>\n<td>" unless %$ctags;
4790                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4791                 print "</td>\n<td>" if %$ctags;
4792                 print git_show_project_tagcloud($cloud, 48);
4793                 print "</td></tr>";
4794         }
4795
4796         print "</table>\n";
4797
4798         # If XSS prevention is on, we don't include README.html.
4799         # TODO: Allow a readme in some safe format.
4800         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4801                 print "<div class=\"title\">readme</div>\n" .
4802                       "<div class=\"readme\">\n";
4803                 insert_file("$projectroot/$project/README.html");
4804                 print "\n</div>\n"; # class="readme"
4805         }
4806
4807         # we need to request one more than 16 (0..15) to check if
4808         # those 16 are all
4809         my @commitlist = $head ? parse_commits($head, 17) : ();
4810         if (@commitlist) {
4811                 git_print_header_div('shortlog');
4812                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4813                                   $#commitlist <=  15 ? undef :
4814                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4815         }
4816
4817         if (@taglist) {
4818                 git_print_header_div('tags');
4819                 git_tags_body(\@taglist, 0, 15,
4820                               $#taglist <=  15 ? undef :
4821                               $cgi->a({-href => href(action=>"tags")}, "..."));
4822         }
4823
4824         if (@headlist) {
4825                 git_print_header_div('heads');
4826                 git_heads_body(\@headlist, $head, 0, 15,
4827                                $#headlist <= 15 ? undef :
4828                                $cgi->a({-href => href(action=>"heads")}, "..."));
4829         }
4830
4831         if (@forklist) {
4832                 git_print_header_div('forks');
4833                 git_project_list_body(\@forklist, 'age', 0, 15,
4834                                       $#forklist <= 15 ? undef :
4835                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4836                                       'no_header');
4837         }
4838
4839         git_footer_html();
4840 }
4841
4842 sub git_tag {
4843         my $head = git_get_head_hash($project);
4844         git_header_html();
4845         git_print_page_nav('','', $head,undef,$head);
4846         my %tag = parse_tag($hash);
4847
4848         if (! %tag) {
4849                 die_error(404, "Unknown tag object");
4850         }
4851
4852         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4853         print "<div class=\"title_text\">\n" .
4854               "<table class=\"object_header\">\n" .
4855               "<tr>\n" .
4856               "<td>object</td>\n" .
4857               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4858                                $tag{'object'}) . "</td>\n" .
4859               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4860                                               $tag{'type'}) . "</td>\n" .
4861               "</tr>\n";
4862         if (defined($tag{'author'})) {
4863                 git_print_authorship_rows(\%tag, 'author');
4864         }
4865         print "</table>\n\n" .
4866               "</div>\n";
4867         print "<div class=\"page_body\">";
4868         my $comment = $tag{'comment'};
4869         foreach my $line (@$comment) {
4870                 chomp $line;
4871                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4872         }
4873         print "</div>\n";
4874         git_footer_html();
4875 }
4876
4877 sub git_blame {
4878         # permissions
4879         gitweb_check_feature('blame')
4880                 or die_error(403, "Blame view not allowed");
4881
4882         # error checking
4883         die_error(400, "No file name given") unless $file_name;
4884         $hash_base ||= git_get_head_hash($project);
4885         die_error(404, "Couldn't find base commit") unless $hash_base;
4886         my %co = parse_commit($hash_base)
4887                 or die_error(404, "Commit not found");
4888         my $ftype = "blob";
4889         if (!defined $hash) {
4890                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4891                         or die_error(404, "Error looking up file");
4892         } else {
4893                 $ftype = git_get_type($hash);
4894                 if ($ftype !~ "blob") {
4895                         die_error(400, "Object is not a blob");
4896                 }
4897         }
4898
4899         # run git-blame --porcelain
4900         open my $fd, "-|", git_cmd(), "blame", '-p',
4901                 $hash_base, '--', $file_name
4902                 or die_error(500, "Open git-blame failed");
4903
4904         # page header
4905         git_header_html();
4906         my $formats_nav =
4907                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4908                         "blob") .
4909                 " | " .
4910                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4911                         "history") .
4912                 " | " .
4913                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4914                         "HEAD");
4915         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4916         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4917         git_print_page_path($file_name, $ftype, $hash_base);
4918
4919         # page body
4920         my @rev_color = qw(light dark);
4921         my $num_colors = scalar(@rev_color);
4922         my $current_color = 0;
4923         my %metainfo = ();
4924
4925         print <<HTML;
4926 <div class="page_body">
4927 <table class="blame">
4928 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4929 HTML
4930  LINE:
4931         while (my $line = <$fd>) {
4932                 chomp $line;
4933                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4934                 # no <lines in group> for subsequent lines in group of lines
4935                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4936                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4937                 if (!exists $metainfo{$full_rev}) {
4938                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4939                 }
4940                 my $meta = $metainfo{$full_rev};
4941                 my $data;
4942                 while ($data = <$fd>) {
4943                         chomp $data;
4944                         last if ($data =~ s/^\t//); # contents of line
4945                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4946                                 $meta->{$1} = $2 unless exists $meta->{$1};
4947                         }
4948                         if ($data =~ /^previous /) {
4949                                 $meta->{'nprevious'}++;
4950                         }
4951                 }
4952                 my $short_rev = substr($full_rev, 0, 8);
4953                 my $author = $meta->{'author'};
4954                 my %date =
4955                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4956                 my $date = $date{'iso-tz'};
4957                 if ($group_size) {
4958                         $current_color = ($current_color + 1) % $num_colors;
4959                 }
4960                 my $tr_class = $rev_color[$current_color];
4961                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4962                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4963                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4964                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4965                 if ($group_size) {
4966                         print "<td class=\"sha1\"";
4967                         print " title=\"". esc_html($author) . ", $date\"";
4968                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4969                         print ">";
4970                         print $cgi->a({-href => href(action=>"commit",
4971                                                      hash=>$full_rev,
4972                                                      file_name=>$file_name)},
4973                                       esc_html($short_rev));
4974                         if ($group_size >= 2) {
4975                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4976                                 if (@author_initials) {
4977                                         print "<br />" .
4978                                               esc_html(join('', @author_initials));
4979                                         #           or join('.', ...)
4980                                 }
4981                         }
4982                         print "</td>\n";
4983                 }
4984                 # 'previous' <sha1 of parent commit> <filename at commit>
4985                 if (exists $meta->{'previous'} &&
4986                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4987                         $meta->{'parent'} = $1;
4988                         $meta->{'file_parent'} = unquote($2);
4989                 }
4990                 my $linenr_commit =
4991                         exists($meta->{'parent'}) ?
4992                         $meta->{'parent'} : $full_rev;
4993                 my $linenr_filename =
4994                         exists($meta->{'file_parent'}) ?
4995                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4996                 my $blamed = href(action => 'blame',
4997                                   file_name => $linenr_filename,
4998                                   hash_base => $linenr_commit);
4999                 print "<td class=\"linenr\">";
5000                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
5001                                 -class => "linenr" },
5002                               esc_html($lineno));
5003                 print "</td>";
5004                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5005                 print "</tr>\n";
5006         }
5007         print "</table>\n";
5008         print "</div>";
5009         close $fd
5010                 or print "Reading blob failed\n";
5011
5012         # page footer
5013         git_footer_html();
5014 }
5015
5016 sub git_tags {
5017         my $head = git_get_head_hash($project);
5018         git_header_html();
5019         git_print_page_nav('','', $head,undef,$head);
5020         git_print_header_div('summary', $project);
5021
5022         my @tagslist = git_get_tags_list();
5023         if (@tagslist) {
5024                 git_tags_body(\@tagslist);
5025         }
5026         git_footer_html();
5027 }
5028
5029 sub git_heads {
5030         my $head = git_get_head_hash($project);
5031         git_header_html();
5032         git_print_page_nav('','', $head,undef,$head);
5033         git_print_header_div('summary', $project);
5034
5035         my @headslist = git_get_heads_list();
5036         if (@headslist) {
5037                 git_heads_body(\@headslist, $head);
5038         }
5039         git_footer_html();
5040 }
5041
5042 sub git_blob_plain {
5043         my $type = shift;
5044         my $expires;
5045
5046         if (!defined $hash) {
5047                 if (defined $file_name) {
5048                         my $base = $hash_base || git_get_head_hash($project);
5049                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5050                                 or die_error(404, "Cannot find file");
5051                 } else {
5052                         die_error(400, "No file name defined");
5053                 }
5054         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5055                 # blobs defined by non-textual hash id's can be cached
5056                 $expires = "+1d";
5057         }
5058
5059         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5060                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5061
5062         # content-type (can include charset)
5063         $type = blob_contenttype($fd, $file_name, $type);
5064
5065         # "save as" filename, even when no $file_name is given
5066         my $save_as = "$hash";
5067         if (defined $file_name) {
5068                 $save_as = $file_name;
5069         } elsif ($type =~ m/^text\//) {
5070                 $save_as .= '.txt';
5071         }
5072
5073         # With XSS prevention on, blobs of all types except a few known safe
5074         # ones are served with "Content-Disposition: attachment" to make sure
5075         # they don't run in our security domain.  For certain image types,
5076         # blob view writes an <img> tag referring to blob_plain view, and we
5077         # want to be sure not to break that by serving the image as an
5078         # attachment (though Firefox 3 doesn't seem to care).
5079         my $sandbox = $prevent_xss &&
5080                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5081
5082         print $cgi->header(
5083                 -type => $type,
5084                 -expires => $expires,
5085                 -content_disposition =>
5086                         ($sandbox ? 'attachment' : 'inline')
5087                         . '; filename="' . $save_as . '"');
5088         local $/ = undef;
5089         binmode STDOUT, ':raw';
5090         print <$fd>;
5091         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5092         close $fd;
5093 }
5094
5095 sub git_blob {
5096         my $expires;
5097
5098         if (!defined $hash) {
5099                 if (defined $file_name) {
5100                         my $base = $hash_base || git_get_head_hash($project);
5101                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5102                                 or die_error(404, "Cannot find file");
5103                 } else {
5104                         die_error(400, "No file name defined");
5105                 }
5106         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5107                 # blobs defined by non-textual hash id's can be cached
5108                 $expires = "+1d";
5109         }
5110
5111         my $have_blame = gitweb_check_feature('blame');
5112         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5113                 or die_error(500, "Couldn't cat $file_name, $hash");
5114         my $mimetype = blob_mimetype($fd, $file_name);
5115         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5116                 close $fd;
5117                 return git_blob_plain($mimetype);
5118         }
5119         # we can have blame only for text/* mimetype
5120         $have_blame &&= ($mimetype =~ m!^text/!);
5121
5122         git_header_html(undef, $expires);
5123         my $formats_nav = '';
5124         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5125                 if (defined $file_name) {
5126                         if ($have_blame) {
5127                                 $formats_nav .=
5128                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5129                                                 "blame") .
5130                                         " | ";
5131                         }
5132                         $formats_nav .=
5133                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5134                                         "history") .
5135                                 " | " .
5136                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5137                                         "raw") .
5138                                 " | " .
5139                                 $cgi->a({-href => href(action=>"blob",
5140                                                        hash_base=>"HEAD", file_name=>$file_name)},
5141                                         "HEAD");
5142                 } else {
5143                         $formats_nav .=
5144                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5145                                         "raw");
5146                 }
5147                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5148                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5149         } else {
5150                 print "<div class=\"page_nav\">\n" .
5151                       "<br/><br/></div>\n" .
5152                       "<div class=\"title\">$hash</div>\n";
5153         }
5154         git_print_page_path($file_name, "blob", $hash_base);
5155         print "<div class=\"page_body\">\n";
5156         if ($mimetype =~ m!^image/!) {
5157                 print qq!<img type="$mimetype"!;
5158                 if ($file_name) {
5159                         print qq! alt="$file_name" title="$file_name"!;
5160                 }
5161                 print qq! src="! .
5162                       href(action=>"blob_plain", hash=>$hash,
5163                            hash_base=>$hash_base, file_name=>$file_name) .
5164                       qq!" />\n!;
5165         } else {
5166                 my $nr;
5167                 while (my $line = <$fd>) {
5168                         chomp $line;
5169                         $nr++;
5170                         $line = untabify($line);
5171                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5172                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5173                 }
5174         }
5175         close $fd
5176                 or print "Reading blob failed.\n";
5177         print "</div>";
5178         git_footer_html();
5179 }
5180
5181 sub git_tree {
5182         if (!defined $hash_base) {
5183                 $hash_base = "HEAD";
5184         }
5185         if (!defined $hash) {
5186                 if (defined $file_name) {
5187                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5188                 } else {
5189                         $hash = $hash_base;
5190                 }
5191         }
5192         die_error(404, "No such tree") unless defined($hash);
5193
5194         my $show_sizes = gitweb_check_feature('show-sizes');
5195         my $have_blame = gitweb_check_feature('blame');
5196
5197         my @entries = ();
5198         {
5199                 local $/ = "\0";
5200                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5201                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5202                         or die_error(500, "Open git-ls-tree failed");
5203                 @entries = map { chomp; $_ } <$fd>;
5204                 close $fd
5205                         or die_error(404, "Reading tree failed");
5206         }
5207
5208         my $refs = git_get_references();
5209         my $ref = format_ref_marker($refs, $hash_base);
5210         git_header_html();
5211         my $basedir = '';
5212         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5213                 my @views_nav = ();
5214                 if (defined $file_name) {
5215                         push @views_nav,
5216                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5217                                         "history"),
5218                                 $cgi->a({-href => href(action=>"tree",
5219                                                        hash_base=>"HEAD", file_name=>$file_name)},
5220                                         "HEAD"),
5221                 }
5222                 my $snapshot_links = format_snapshot_links($hash);
5223                 if (defined $snapshot_links) {
5224                         # FIXME: Should be available when we have no hash base as well.
5225                         push @views_nav, $snapshot_links;
5226                 }
5227                 git_print_page_nav('tree','', $hash_base, undef, undef,
5228                                    join(' | ', @views_nav));
5229                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5230         } else {
5231                 undef $hash_base;
5232                 print "<div class=\"page_nav\">\n";
5233                 print "<br/><br/></div>\n";
5234                 print "<div class=\"title\">$hash</div>\n";
5235         }
5236         if (defined $file_name) {
5237                 $basedir = $file_name;
5238                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5239                         $basedir .= '/';
5240                 }
5241                 git_print_page_path($file_name, 'tree', $hash_base);
5242         }
5243         print "<div class=\"page_body\">\n";
5244         print "<table class=\"tree\">\n";
5245         my $alternate = 1;
5246         # '..' (top directory) link if possible
5247         if (defined $hash_base &&
5248             defined $file_name && $file_name =~ m![^/]+$!) {
5249                 if ($alternate) {
5250                         print "<tr class=\"dark\">\n";
5251                 } else {
5252                         print "<tr class=\"light\">\n";
5253                 }
5254                 $alternate ^= 1;
5255
5256                 my $up = $file_name;
5257                 $up =~ s!/?[^/]+$!!;
5258                 undef $up unless $up;
5259                 # based on git_print_tree_entry
5260                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5261                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5262                 print '<td class="list">';
5263                 print $cgi->a({-href => href(action=>"tree",
5264                                              hash_base=>$hash_base,
5265                                              file_name=>$up)},
5266                               "..");
5267                 print "</td>\n";
5268                 print "<td class=\"link\"></td>\n";
5269
5270                 print "</tr>\n";
5271         }
5272         foreach my $line (@entries) {
5273                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5274
5275                 if ($alternate) {
5276                         print "<tr class=\"dark\">\n";
5277                 } else {
5278                         print "<tr class=\"light\">\n";
5279                 }
5280                 $alternate ^= 1;
5281
5282                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5283
5284                 print "</tr>\n";
5285         }
5286         print "</table>\n" .
5287               "</div>";
5288         git_footer_html();
5289 }
5290
5291 sub git_snapshot {
5292         my $format = $input_params{'snapshot_format'};
5293         if (!@snapshot_fmts) {
5294                 die_error(403, "Snapshots not allowed");
5295         }
5296         # default to first supported snapshot format
5297         $format ||= $snapshot_fmts[0];
5298         if ($format !~ m/^[a-z0-9]+$/) {
5299                 die_error(400, "Invalid snapshot format parameter");
5300         } elsif (!exists($known_snapshot_formats{$format})) {
5301                 die_error(400, "Unknown snapshot format");
5302         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5303                 die_error(403, "Snapshot format not allowed");
5304         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5305                 die_error(403, "Unsupported snapshot format");
5306         }
5307
5308         if (!defined $hash) {
5309                 $hash = git_get_head_hash($project);
5310         }
5311
5312         my $name = $project;
5313         $name =~ s,([^/])/*\.git$,$1,;
5314         $name = basename($name);
5315         my $filename = to_utf8($name);
5316         $name =~ s/\047/\047\\\047\047/g;
5317         my $cmd;
5318         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5319         $cmd = quote_command(
5320                 git_cmd(), 'archive',
5321                 "--format=$known_snapshot_formats{$format}{'format'}",
5322                 "--prefix=$name/", $hash);
5323         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5324                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5325         }
5326
5327         print $cgi->header(
5328                 -type => $known_snapshot_formats{$format}{'type'},
5329                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5330                 -status => '200 OK');
5331
5332         open my $fd, "-|", $cmd
5333                 or die_error(500, "Execute git-archive failed");
5334         binmode STDOUT, ':raw';
5335         print <$fd>;
5336         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5337         close $fd;
5338 }
5339
5340 sub git_log {
5341         my $head = git_get_head_hash($project);
5342         if (!defined $hash) {
5343                 $hash = $head;
5344         }
5345         if (!defined $page) {
5346                 $page = 0;
5347         }
5348         my $refs = git_get_references();
5349
5350         my @commitlist = parse_commits($hash, 101, (100 * $page));
5351
5352         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5353
5354         my ($patch_max) = gitweb_get_feature('patches');
5355         if ($patch_max) {
5356                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5357                         $paging_nav .= " &sdot; " .
5358                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5359                                         "patches");
5360                 }
5361         }
5362
5363         git_header_html();
5364         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5365
5366         if (!@commitlist) {
5367                 my %co = parse_commit($hash);
5368
5369                 git_print_header_div('summary', $project);
5370                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5371         }
5372         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5373         for (my $i = 0; $i <= $to; $i++) {
5374                 my %co = %{$commitlist[$i]};
5375                 next if !%co;
5376                 my $commit = $co{'id'};
5377                 my $ref = format_ref_marker($refs, $commit);
5378                 my %ad = parse_date($co{'author_epoch'});
5379                 git_print_header_div('commit',
5380                                "<span class=\"age\">$co{'age_string'}</span>" .
5381                                esc_html($co{'title'}) . $ref,
5382                                $commit);
5383                 print "<div class=\"title_text\">\n" .
5384                       "<div class=\"log_link\">\n" .
5385                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5386                       " | " .
5387                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5388                       " | " .
5389                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5390                       "<br/>\n" .
5391                       "</div>\n";
5392                       git_print_authorship(\%co, -tag => 'span');
5393                       print "<br/>\n</div>\n";
5394
5395                 print "<div class=\"log_body\">\n";
5396                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5397                 print "</div>\n";
5398         }
5399         if ($#commitlist >= 100) {
5400                 print "<div class=\"page_nav\">\n";
5401                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5402                                -accesskey => "n", -title => "Alt-n"}, "next");
5403                 print "</div>\n";
5404         }
5405         git_footer_html();
5406 }
5407
5408 sub git_commit {
5409         $hash ||= $hash_base || "HEAD";
5410         my %co = parse_commit($hash)
5411             or die_error(404, "Unknown commit object");
5412
5413         my $parent  = $co{'parent'};
5414         my $parents = $co{'parents'}; # listref
5415
5416         # we need to prepare $formats_nav before any parameter munging
5417         my $formats_nav;
5418         if (!defined $parent) {
5419                 # --root commitdiff
5420                 $formats_nav .= '(initial)';
5421         } elsif (@$parents == 1) {
5422                 # single parent commit
5423                 $formats_nav .=
5424                         '(parent: ' .
5425                         $cgi->a({-href => href(action=>"commit",
5426                                                hash=>$parent)},
5427                                 esc_html(substr($parent, 0, 7))) .
5428                         ')';
5429         } else {
5430                 # merge commit
5431                 $formats_nav .=
5432                         '(merge: ' .
5433                         join(' ', map {
5434                                 $cgi->a({-href => href(action=>"commit",
5435                                                        hash=>$_)},
5436                                         esc_html(substr($_, 0, 7)));
5437                         } @$parents ) .
5438                         ')';
5439         }
5440         if (gitweb_check_feature('patches') && @$parents <= 1) {
5441                 $formats_nav .= " | " .
5442                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5443                                 "patch");
5444         }
5445
5446         if (!defined $parent) {
5447                 $parent = "--root";
5448         }
5449         my @difftree;
5450         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5451                 @diff_opts,
5452                 (@$parents <= 1 ? $parent : '-c'),
5453                 $hash, "--"
5454                 or die_error(500, "Open git-diff-tree failed");
5455         @difftree = map { chomp; $_ } <$fd>;
5456         close $fd or die_error(404, "Reading git-diff-tree failed");
5457
5458         # non-textual hash id's can be cached
5459         my $expires;
5460         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5461                 $expires = "+1d";
5462         }
5463         my $refs = git_get_references();
5464         my $ref = format_ref_marker($refs, $co{'id'});
5465
5466         git_header_html(undef, $expires);
5467         git_print_page_nav('commit', '',
5468                            $hash, $co{'tree'}, $hash,
5469                            $formats_nav);
5470
5471         if (defined $co{'parent'}) {
5472                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5473         } else {
5474                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5475         }
5476         print "<div class=\"title_text\">\n" .
5477               "<table class=\"object_header\">\n";
5478         git_print_authorship_rows(\%co);
5479         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5480         print "<tr>" .
5481               "<td>tree</td>" .
5482               "<td class=\"sha1\">" .
5483               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5484                        class => "list"}, $co{'tree'}) .
5485               "</td>" .
5486               "<td class=\"link\">" .
5487               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5488                       "tree");
5489         my $snapshot_links = format_snapshot_links($hash);
5490         if (defined $snapshot_links) {
5491                 print " | " . $snapshot_links;
5492         }
5493         print "</td>" .
5494               "</tr>\n";
5495
5496         foreach my $par (@$parents) {
5497                 print "<tr>" .
5498                       "<td>parent</td>" .
5499                       "<td class=\"sha1\">" .
5500                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5501                                class => "list"}, $par) .
5502                       "</td>" .
5503                       "<td class=\"link\">" .
5504                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5505                       " | " .
5506                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5507                       "</td>" .
5508                       "</tr>\n";
5509         }
5510         print "</table>".
5511               "</div>\n";
5512
5513         print "<div class=\"page_body\">\n";
5514         git_print_log($co{'comment'});
5515         print "</div>\n";
5516
5517         git_difftree_body(\@difftree, $hash, @$parents);
5518
5519         git_footer_html();
5520 }
5521
5522 sub git_object {
5523         # object is defined by:
5524         # - hash or hash_base alone
5525         # - hash_base and file_name
5526         my $type;
5527
5528         # - hash or hash_base alone
5529         if ($hash || ($hash_base && !defined $file_name)) {
5530                 my $object_id = $hash || $hash_base;
5531
5532                 open my $fd, "-|", quote_command(
5533                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5534                         or die_error(404, "Object does not exist");
5535                 $type = <$fd>;
5536                 chomp $type;
5537                 close $fd
5538                         or die_error(404, "Object does not exist");
5539
5540         # - hash_base and file_name
5541         } elsif ($hash_base && defined $file_name) {
5542                 $file_name =~ s,/+$,,;
5543
5544                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5545                         or die_error(404, "Base object does not exist");
5546
5547                 # here errors should not hapen
5548                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5549                         or die_error(500, "Open git-ls-tree failed");
5550                 my $line = <$fd>;
5551                 close $fd;
5552
5553                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5554                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5555                         die_error(404, "File or directory for given base does not exist");
5556                 }
5557                 $type = $2;
5558                 $hash = $3;
5559         } else {
5560                 die_error(400, "Not enough information to find object");
5561         }
5562
5563         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5564                                           hash=>$hash, hash_base=>$hash_base,
5565                                           file_name=>$file_name),
5566                              -status => '302 Found');
5567 }
5568
5569 sub git_blobdiff {
5570         my $format = shift || 'html';
5571
5572         my $fd;
5573         my @difftree;
5574         my %diffinfo;
5575         my $expires;
5576
5577         # preparing $fd and %diffinfo for git_patchset_body
5578         # new style URI
5579         if (defined $hash_base && defined $hash_parent_base) {
5580                 if (defined $file_name) {
5581                         # read raw output
5582                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5583                                 $hash_parent_base, $hash_base,
5584                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5585                                 or die_error(500, "Open git-diff-tree failed");
5586                         @difftree = map { chomp; $_ } <$fd>;
5587                         close $fd
5588                                 or die_error(404, "Reading git-diff-tree failed");
5589                         @difftree
5590                                 or die_error(404, "Blob diff not found");
5591
5592                 } elsif (defined $hash &&
5593                          $hash =~ /[0-9a-fA-F]{40}/) {
5594                         # try to find filename from $hash
5595
5596                         # read filtered raw output
5597                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5598                                 $hash_parent_base, $hash_base, "--"
5599                                 or die_error(500, "Open git-diff-tree failed");
5600                         @difftree =
5601                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5602                                 # $hash == to_id
5603                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5604                                 map { chomp; $_ } <$fd>;
5605                         close $fd
5606                                 or die_error(404, "Reading git-diff-tree failed");
5607                         @difftree
5608                                 or die_error(404, "Blob diff not found");
5609
5610                 } else {
5611                         die_error(400, "Missing one of the blob diff parameters");
5612                 }
5613
5614                 if (@difftree > 1) {
5615                         die_error(400, "Ambiguous blob diff specification");
5616                 }
5617
5618                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5619                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5620                 $file_name   ||= $diffinfo{'to_file'};
5621
5622                 $hash_parent ||= $diffinfo{'from_id'};
5623                 $hash        ||= $diffinfo{'to_id'};
5624
5625                 # non-textual hash id's can be cached
5626                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5627                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5628                         $expires = '+1d';
5629                 }
5630
5631                 # open patch output
5632                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5633                         '-p', ($format eq 'html' ? "--full-index" : ()),
5634                         $hash_parent_base, $hash_base,
5635                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5636                         or die_error(500, "Open git-diff-tree failed");
5637         }
5638
5639         # old/legacy style URI -- not generated anymore since 1.4.3.
5640         if (!%diffinfo) {
5641                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5642         }
5643
5644         # header
5645         if ($format eq 'html') {
5646                 my $formats_nav =
5647                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5648                                 "raw");
5649                 git_header_html(undef, $expires);
5650                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5651                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5652                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5653                 } else {
5654                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5655                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5656                 }
5657                 if (defined $file_name) {
5658                         git_print_page_path($file_name, "blob", $hash_base);
5659                 } else {
5660                         print "<div class=\"page_path\"></div>\n";
5661                 }
5662
5663         } elsif ($format eq 'plain') {
5664                 print $cgi->header(
5665                         -type => 'text/plain',
5666                         -charset => 'utf-8',
5667                         -expires => $expires,
5668                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5669
5670                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5671
5672         } else {
5673                 die_error(400, "Unknown blobdiff format");
5674         }
5675
5676         # patch
5677         if ($format eq 'html') {
5678                 print "<div class=\"page_body\">\n";
5679
5680                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5681                 close $fd;
5682
5683                 print "</div>\n"; # class="page_body"
5684                 git_footer_html();
5685
5686         } else {
5687                 while (my $line = <$fd>) {
5688                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5689                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5690
5691                         print $line;
5692
5693                         last if $line =~ m!^\+\+\+!;
5694                 }
5695                 local $/ = undef;
5696                 print <$fd>;
5697                 close $fd;
5698         }
5699 }
5700
5701 sub git_blobdiff_plain {
5702         git_blobdiff('plain');
5703 }
5704
5705 sub git_commitdiff {
5706         my %params = @_;
5707         my $format = $params{-format} || 'html';
5708
5709         my ($patch_max) = gitweb_get_feature('patches');
5710         if ($format eq 'patch') {
5711                 die_error(403, "Patch view not allowed") unless $patch_max;
5712         }
5713
5714         $hash ||= $hash_base || "HEAD";
5715         my %co = parse_commit($hash)
5716             or die_error(404, "Unknown commit object");
5717
5718         # choose format for commitdiff for merge
5719         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5720                 $hash_parent = '--cc';
5721         }
5722         # we need to prepare $formats_nav before almost any parameter munging
5723         my $formats_nav;
5724         if ($format eq 'html') {
5725                 $formats_nav =
5726                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5727                                 "raw");
5728                 if ($patch_max && @{$co{'parents'}} <= 1) {
5729                         $formats_nav .= " | " .
5730                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5731                                         "patch");
5732                 }
5733
5734                 if (defined $hash_parent &&
5735                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5736                         # commitdiff with two commits given
5737                         my $hash_parent_short = $hash_parent;
5738                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5739                                 $hash_parent_short = substr($hash_parent, 0, 7);
5740                         }
5741                         $formats_nav .=
5742                                 ' (from';
5743                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5744                                 if ($co{'parents'}[$i] eq $hash_parent) {
5745                                         $formats_nav .= ' parent ' . ($i+1);
5746                                         last;
5747                                 }
5748                         }
5749                         $formats_nav .= ': ' .
5750                                 $cgi->a({-href => href(action=>"commitdiff",
5751                                                        hash=>$hash_parent)},
5752                                         esc_html($hash_parent_short)) .
5753                                 ')';
5754                 } elsif (!$co{'parent'}) {
5755                         # --root commitdiff
5756                         $formats_nav .= ' (initial)';
5757                 } elsif (scalar @{$co{'parents'}} == 1) {
5758                         # single parent commit
5759                         $formats_nav .=
5760                                 ' (parent: ' .
5761                                 $cgi->a({-href => href(action=>"commitdiff",
5762                                                        hash=>$co{'parent'})},
5763                                         esc_html(substr($co{'parent'}, 0, 7))) .
5764                                 ')';
5765                 } else {
5766                         # merge commit
5767                         if ($hash_parent eq '--cc') {
5768                                 $formats_nav .= ' | ' .
5769                                         $cgi->a({-href => href(action=>"commitdiff",
5770                                                                hash=>$hash, hash_parent=>'-c')},
5771                                                 'combined');
5772                         } else { # $hash_parent eq '-c'
5773                                 $formats_nav .= ' | ' .
5774                                         $cgi->a({-href => href(action=>"commitdiff",
5775                                                                hash=>$hash, hash_parent=>'--cc')},
5776                                                 'compact');
5777                         }
5778                         $formats_nav .=
5779                                 ' (merge: ' .
5780                                 join(' ', map {
5781                                         $cgi->a({-href => href(action=>"commitdiff",
5782                                                                hash=>$_)},
5783                                                 esc_html(substr($_, 0, 7)));
5784                                 } @{$co{'parents'}} ) .
5785                                 ')';
5786                 }
5787         }
5788
5789         my $hash_parent_param = $hash_parent;
5790         if (!defined $hash_parent_param) {
5791                 # --cc for multiple parents, --root for parentless
5792                 $hash_parent_param =
5793                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5794         }
5795
5796         # read commitdiff
5797         my $fd;
5798         my @difftree;
5799         if ($format eq 'html') {
5800                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5801                         "--no-commit-id", "--patch-with-raw", "--full-index",
5802                         $hash_parent_param, $hash, "--"
5803                         or die_error(500, "Open git-diff-tree failed");
5804
5805                 while (my $line = <$fd>) {
5806                         chomp $line;
5807                         # empty line ends raw part of diff-tree output
5808                         last unless $line;
5809                         push @difftree, scalar parse_difftree_raw_line($line);
5810                 }
5811
5812         } elsif ($format eq 'plain') {
5813                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5814                         '-p', $hash_parent_param, $hash, "--"
5815                         or die_error(500, "Open git-diff-tree failed");
5816         } elsif ($format eq 'patch') {
5817                 # For commit ranges, we limit the output to the number of
5818                 # patches specified in the 'patches' feature.
5819                 # For single commits, we limit the output to a single patch,
5820                 # diverging from the git-format-patch default.
5821                 my @commit_spec = ();
5822                 if ($hash_parent) {
5823                         if ($patch_max > 0) {
5824                                 push @commit_spec, "-$patch_max";
5825                         }
5826                         push @commit_spec, '-n', "$hash_parent..$hash";
5827                 } else {
5828                         if ($params{-single}) {
5829                                 push @commit_spec, '-1';
5830                         } else {
5831                                 if ($patch_max > 0) {
5832                                         push @commit_spec, "-$patch_max";
5833                                 }
5834                                 push @commit_spec, "-n";
5835                         }
5836                         push @commit_spec, '--root', $hash;
5837                 }
5838                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5839                         '--stdout', @commit_spec
5840                         or die_error(500, "Open git-format-patch failed");
5841         } else {
5842                 die_error(400, "Unknown commitdiff format");
5843         }
5844
5845         # non-textual hash id's can be cached
5846         my $expires;
5847         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5848                 $expires = "+1d";
5849         }
5850
5851         # write commit message
5852         if ($format eq 'html') {
5853                 my $refs = git_get_references();
5854                 my $ref = format_ref_marker($refs, $co{'id'});
5855
5856                 git_header_html(undef, $expires);
5857                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5858                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5859                 print "<div class=\"title_text\">\n" .
5860                       "<table class=\"object_header\">\n";
5861                 git_print_authorship_rows(\%co);
5862                 print "</table>".
5863                       "</div>\n";
5864                 print "<div class=\"page_body\">\n";
5865                 if (@{$co{'comment'}} > 1) {
5866                         print "<div class=\"log\">\n";
5867                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5868                         print "</div>\n"; # class="log"
5869                 }
5870
5871         } elsif ($format eq 'plain') {
5872                 my $refs = git_get_references("tags");
5873                 my $tagname = git_get_rev_name_tags($hash);
5874                 my $filename = basename($project) . "-$hash.patch";
5875
5876                 print $cgi->header(
5877                         -type => 'text/plain',
5878                         -charset => 'utf-8',
5879                         -expires => $expires,
5880                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5881                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5882                 print "From: " . to_utf8($co{'author'}) . "\n";
5883                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5884                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5885
5886                 print "X-Git-Tag: $tagname\n" if $tagname;
5887                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5888
5889                 foreach my $line (@{$co{'comment'}}) {
5890                         print to_utf8($line) . "\n";
5891                 }
5892                 print "---\n\n";
5893         } elsif ($format eq 'patch') {
5894                 my $filename = basename($project) . "-$hash.patch";
5895
5896                 print $cgi->header(
5897                         -type => 'text/plain',
5898                         -charset => 'utf-8',
5899                         -expires => $expires,
5900                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5901         }
5902
5903         # write patch
5904         if ($format eq 'html') {
5905                 my $use_parents = !defined $hash_parent ||
5906                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5907                 git_difftree_body(\@difftree, $hash,
5908                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5909                 print "<br/>\n";
5910
5911                 git_patchset_body($fd, \@difftree, $hash,
5912                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5913                 close $fd;
5914                 print "</div>\n"; # class="page_body"
5915                 git_footer_html();
5916
5917         } elsif ($format eq 'plain') {
5918                 local $/ = undef;
5919                 print <$fd>;
5920                 close $fd
5921                         or print "Reading git-diff-tree failed\n";
5922         } elsif ($format eq 'patch') {
5923                 local $/ = undef;
5924                 print <$fd>;
5925                 close $fd
5926                         or print "Reading git-format-patch failed\n";
5927         }
5928 }
5929
5930 sub git_commitdiff_plain {
5931         git_commitdiff(-format => 'plain');
5932 }
5933
5934 # format-patch-style patches
5935 sub git_patch {
5936         git_commitdiff(-format => 'patch', -single => 1);
5937 }
5938
5939 sub git_patches {
5940         git_commitdiff(-format => 'patch');
5941 }
5942
5943 sub git_history {
5944         if (!defined $hash_base) {
5945                 $hash_base = git_get_head_hash($project);
5946         }
5947         if (!defined $page) {
5948                 $page = 0;
5949         }
5950         my $ftype;
5951         my %co = parse_commit($hash_base)
5952             or die_error(404, "Unknown commit object");
5953
5954         my $refs = git_get_references();
5955         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5956
5957         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5958                                        $file_name, "--full-history")
5959             or die_error(404, "No such file or directory on given branch");
5960
5961         if (!defined $hash && defined $file_name) {
5962                 # some commits could have deleted file in question,
5963                 # and not have it in tree, but one of them has to have it
5964                 for (my $i = 0; $i <= @commitlist; $i++) {
5965                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5966                         last if defined $hash;
5967                 }
5968         }
5969         if (defined $hash) {
5970                 $ftype = git_get_type($hash);
5971         }
5972         if (!defined $ftype) {
5973                 die_error(500, "Unknown type of object");
5974         }
5975
5976         my $paging_nav = '';
5977         if ($page > 0) {
5978                 $paging_nav .=
5979                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5980                                                file_name=>$file_name)},
5981                                 "first");
5982                 $paging_nav .= " &sdot; " .
5983                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5984                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5985         } else {
5986                 $paging_nav .= "first";
5987                 $paging_nav .= " &sdot; prev";
5988         }
5989         my $next_link = '';
5990         if ($#commitlist >= 100) {
5991                 $next_link =
5992                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5993                                  -accesskey => "n", -title => "Alt-n"}, "next");
5994                 $paging_nav .= " &sdot; $next_link";
5995         } else {
5996                 $paging_nav .= " &sdot; next";
5997         }
5998
5999         git_header_html();
6000         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6001         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6002         git_print_page_path($file_name, $ftype, $hash_base);
6003
6004         git_history_body(\@commitlist, 0, 99,
6005                          $refs, $hash_base, $ftype, $next_link);
6006
6007         git_footer_html();
6008 }
6009
6010 sub git_search {
6011         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6012         if (!defined $searchtext) {
6013                 die_error(400, "Text field is empty");
6014         }
6015         if (!defined $hash) {
6016                 $hash = git_get_head_hash($project);
6017         }
6018         my %co = parse_commit($hash);
6019         if (!%co) {
6020                 die_error(404, "Unknown commit object");
6021         }
6022         if (!defined $page) {
6023                 $page = 0;
6024         }
6025
6026         $searchtype ||= 'commit';
6027         if ($searchtype eq 'pickaxe') {
6028                 # pickaxe may take all resources of your box and run for several minutes
6029                 # with every query - so decide by yourself how public you make this feature
6030                 gitweb_check_feature('pickaxe')
6031                     or die_error(403, "Pickaxe is disabled");
6032         }
6033         if ($searchtype eq 'grep') {
6034                 gitweb_check_feature('grep')
6035                     or die_error(403, "Grep is disabled");
6036         }
6037
6038         git_header_html();
6039
6040         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6041                 my $greptype;
6042                 if ($searchtype eq 'commit') {
6043                         $greptype = "--grep=";
6044                 } elsif ($searchtype eq 'author') {
6045                         $greptype = "--author=";
6046                 } elsif ($searchtype eq 'committer') {
6047                         $greptype = "--committer=";
6048                 }
6049                 $greptype .= $searchtext;
6050                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6051                                                $greptype, '--regexp-ignore-case',
6052                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6053
6054                 my $paging_nav = '';
6055                 if ($page > 0) {
6056                         $paging_nav .=
6057                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6058                                                        searchtext=>$searchtext,
6059                                                        searchtype=>$searchtype)},
6060                                         "first");
6061                         $paging_nav .= " &sdot; " .
6062                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6063                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6064                 } else {
6065                         $paging_nav .= "first";
6066                         $paging_nav .= " &sdot; prev";
6067                 }
6068                 my $next_link = '';
6069                 if ($#commitlist >= 100) {
6070                         $next_link =
6071                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6072                                          -accesskey => "n", -title => "Alt-n"}, "next");
6073                         $paging_nav .= " &sdot; $next_link";
6074                 } else {
6075                         $paging_nav .= " &sdot; next";
6076                 }
6077
6078                 if ($#commitlist >= 100) {
6079                 }
6080
6081                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6082                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6083                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6084         }
6085
6086         if ($searchtype eq 'pickaxe') {
6087                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6088                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6089
6090                 print "<table class=\"pickaxe search\">\n";
6091                 my $alternate = 1;
6092                 local $/ = "\n";
6093                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6094                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6095                         ($search_use_regexp ? '--pickaxe-regex' : ());
6096                 undef %co;
6097                 my @files;
6098                 while (my $line = <$fd>) {
6099                         chomp $line;
6100                         next unless $line;
6101
6102                         my %set = parse_difftree_raw_line($line);
6103                         if (defined $set{'commit'}) {
6104                                 # finish previous commit
6105                                 if (%co) {
6106                                         print "</td>\n" .
6107                                               "<td class=\"link\">" .
6108                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6109                                               " | " .
6110                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6111                                         print "</td>\n" .
6112                                               "</tr>\n";
6113                                 }
6114
6115                                 if ($alternate) {
6116                                         print "<tr class=\"dark\">\n";
6117                                 } else {
6118                                         print "<tr class=\"light\">\n";
6119                                 }
6120                                 $alternate ^= 1;
6121                                 %co = parse_commit($set{'commit'});
6122                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6123                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6124                                       "<td><i>$author</i></td>\n" .
6125                                       "<td>" .
6126                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6127                                               -class => "list subject"},
6128                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6129                         } elsif (defined $set{'to_id'}) {
6130                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6131
6132                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6133                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6134                                               -class => "list"},
6135                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6136                                       "<br/>\n";
6137                         }
6138                 }
6139                 close $fd;
6140
6141                 # finish last commit (warning: repetition!)
6142                 if (%co) {
6143                         print "</td>\n" .
6144                               "<td class=\"link\">" .
6145                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6146                               " | " .
6147                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6148                         print "</td>\n" .
6149                               "</tr>\n";
6150                 }
6151
6152                 print "</table>\n";
6153         }
6154
6155         if ($searchtype eq 'grep') {
6156                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6157                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6158
6159                 print "<table class=\"grep_search\">\n";
6160                 my $alternate = 1;
6161                 my $matches = 0;
6162                 local $/ = "\n";
6163                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6164                         $search_use_regexp ? ('-E', '-i') : '-F',
6165                         $searchtext, $co{'tree'};
6166                 my $lastfile = '';
6167                 while (my $line = <$fd>) {
6168                         chomp $line;
6169                         my ($file, $lno, $ltext, $binary);
6170                         last if ($matches++ > 1000);
6171                         if ($line =~ /^Binary file (.+) matches$/) {
6172                                 $file = $1;
6173                                 $binary = 1;
6174                         } else {
6175                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6176                         }
6177                         if ($file ne $lastfile) {
6178                                 $lastfile and print "</td></tr>\n";
6179                                 if ($alternate++) {
6180                                         print "<tr class=\"dark\">\n";
6181                                 } else {
6182                                         print "<tr class=\"light\">\n";
6183                                 }
6184                                 print "<td class=\"list\">".
6185                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6186                                                                file_name=>"$file"),
6187                                                 -class => "list"}, esc_path($file));
6188                                 print "</td><td>\n";
6189                                 $lastfile = $file;
6190                         }
6191                         if ($binary) {
6192                                 print "<div class=\"binary\">Binary file</div>\n";
6193                         } else {
6194                                 $ltext = untabify($ltext);
6195                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6196                                         $ltext = esc_html($1, -nbsp=>1);
6197                                         $ltext .= '<span class="match">';
6198                                         $ltext .= esc_html($2, -nbsp=>1);
6199                                         $ltext .= '</span>';
6200                                         $ltext .= esc_html($3, -nbsp=>1);
6201                                 } else {
6202                                         $ltext = esc_html($ltext, -nbsp=>1);
6203                                 }
6204                                 print "<div class=\"pre\">" .
6205                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6206                                                                file_name=>"$file").'#l'.$lno,
6207                                                 -class => "linenr"}, sprintf('%4i', $lno))
6208                                         . ' ' .  $ltext . "</div>\n";
6209                         }
6210                 }
6211                 if ($lastfile) {
6212                         print "</td></tr>\n";
6213                         if ($matches > 1000) {
6214                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6215                         }
6216                 } else {
6217                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6218                 }
6219                 close $fd;
6220
6221                 print "</table>\n";
6222         }
6223         git_footer_html();
6224 }
6225
6226 sub git_search_help {
6227         git_header_html();
6228         git_print_page_nav('','', $hash,$hash,$hash);
6229         print <<EOT;
6230 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6231 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6232 the pattern entered is recognized as the POSIX extended
6233 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6234 insensitive).</p>
6235 <dl>
6236 <dt><b>commit</b></dt>
6237 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6238 EOT
6239         my $have_grep = gitweb_check_feature('grep');
6240         if ($have_grep) {
6241                 print <<EOT;
6242 <dt><b>grep</b></dt>
6243 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6244     a different one) are searched for the given pattern. On large trees, this search can take
6245 a while and put some strain on the server, so please use it with some consideration. Note that
6246 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6247 case-sensitive.</dd>
6248 EOT
6249         }
6250         print <<EOT;
6251 <dt><b>author</b></dt>
6252 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6253 <dt><b>committer</b></dt>
6254 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6255 EOT
6256         my $have_pickaxe = gitweb_check_feature('pickaxe');
6257         if ($have_pickaxe) {
6258                 print <<EOT;
6259 <dt><b>pickaxe</b></dt>
6260 <dd>All commits that caused the string to appear or disappear from any file (changes that
6261 added, removed or "modified" the string) will be listed. This search can take a while and
6262 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6263 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6264 EOT
6265         }
6266         print "</dl>\n";
6267         git_footer_html();
6268 }
6269
6270 sub git_shortlog {
6271         my $head = git_get_head_hash($project);
6272         if (!defined $hash) {
6273                 $hash = $head;
6274         }
6275         if (!defined $page) {
6276                 $page = 0;
6277         }
6278         my $refs = git_get_references();
6279
6280         my $commit_hash = $hash;
6281         if (defined $hash_parent) {
6282                 $commit_hash = "$hash_parent..$hash";
6283         }
6284         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6285
6286         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6287         my $next_link = '';
6288         if ($#commitlist >= 100) {
6289                 $next_link =
6290                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6291                                  -accesskey => "n", -title => "Alt-n"}, "next");
6292         }
6293         my $patch_max = gitweb_check_feature('patches');
6294         if ($patch_max) {
6295                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6296                         $paging_nav .= " &sdot; " .
6297                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6298                                         "patches");
6299                 }
6300         }
6301
6302         git_header_html();
6303         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6304         git_print_header_div('summary', $project);
6305
6306         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6307
6308         git_footer_html();
6309 }
6310
6311 ## ......................................................................
6312 ## feeds (RSS, Atom; OPML)
6313
6314 sub git_feed {
6315         my $format = shift || 'atom';
6316         my $have_blame = gitweb_check_feature('blame');
6317
6318         # Atom: http://www.atomenabled.org/developers/syndication/
6319         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6320         if ($format ne 'rss' && $format ne 'atom') {
6321                 die_error(400, "Unknown web feed format");
6322         }
6323
6324         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6325         my $head = $hash || 'HEAD';
6326         my @commitlist = parse_commits($head, 150, 0, $file_name);
6327
6328         my %latest_commit;
6329         my %latest_date;
6330         my $content_type = "application/$format+xml";
6331         if (defined $cgi->http('HTTP_ACCEPT') &&
6332                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6333                 # browser (feed reader) prefers text/xml
6334                 $content_type = 'text/xml';
6335         }
6336         if (defined($commitlist[0])) {
6337                 %latest_commit = %{$commitlist[0]};
6338                 my $latest_epoch = $latest_commit{'committer_epoch'};
6339                 %latest_date   = parse_date($latest_epoch);
6340                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6341                 if (defined $if_modified) {
6342                         my $since;
6343                         if (eval { require HTTP::Date; 1; }) {
6344                                 $since = HTTP::Date::str2time($if_modified);
6345                         } elsif (eval { require Time::ParseDate; 1; }) {
6346                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6347                         }
6348                         if (defined $since && $latest_epoch <= $since) {
6349                                 print $cgi->header(
6350                                         -type => $content_type,
6351                                         -charset => 'utf-8',
6352                                         -last_modified => $latest_date{'rfc2822'},
6353                                         -status => '304 Not Modified');
6354                                 return;
6355                         }
6356                 }
6357                 print $cgi->header(
6358                         -type => $content_type,
6359                         -charset => 'utf-8',
6360                         -last_modified => $latest_date{'rfc2822'});
6361         } else {
6362                 print $cgi->header(
6363                         -type => $content_type,
6364                         -charset => 'utf-8');
6365         }
6366
6367         # Optimization: skip generating the body if client asks only
6368         # for Last-Modified date.
6369         return if ($cgi->request_method() eq 'HEAD');
6370
6371         # header variables
6372         my $title = "$site_name - $project/$action";
6373         my $feed_type = 'log';
6374         if (defined $hash) {
6375                 $title .= " - '$hash'";
6376                 $feed_type = 'branch log';
6377                 if (defined $file_name) {
6378                         $title .= " :: $file_name";
6379                         $feed_type = 'history';
6380                 }
6381         } elsif (defined $file_name) {
6382                 $title .= " - $file_name";
6383                 $feed_type = 'history';
6384         }
6385         $title .= " $feed_type";
6386         my $descr = git_get_project_description($project);
6387         if (defined $descr) {
6388                 $descr = esc_html($descr);
6389         } else {
6390                 $descr = "$project " .
6391                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6392                          " feed";
6393         }
6394         my $owner = git_get_project_owner($project);
6395         $owner = esc_html($owner);
6396
6397         #header
6398         my $alt_url;
6399         if (defined $file_name) {
6400                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6401         } elsif (defined $hash) {
6402                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6403         } else {
6404                 $alt_url = href(-full=>1, action=>"summary");
6405         }
6406         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6407         if ($format eq 'rss') {
6408                 print <<XML;
6409 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6410 <channel>
6411 XML
6412                 print "<title>$title</title>\n" .
6413                       "<link>$alt_url</link>\n" .
6414                       "<description>$descr</description>\n" .
6415                       "<language>en</language>\n" .
6416                       # project owner is responsible for 'editorial' content
6417                       "<managingEditor>$owner</managingEditor>\n";
6418                 if (defined $logo || defined $favicon) {
6419                         # prefer the logo to the favicon, since RSS
6420                         # doesn't allow both
6421                         my $img = esc_url($logo || $favicon);
6422                         print "<image>\n" .
6423                               "<url>$img</url>\n" .
6424                               "<title>$title</title>\n" .
6425                               "<link>$alt_url</link>\n" .
6426                               "</image>\n";
6427                 }
6428                 if (%latest_date) {
6429                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6430                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6431                 }
6432                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6433         } elsif ($format eq 'atom') {
6434                 print <<XML;
6435 <feed xmlns="http://www.w3.org/2005/Atom">
6436 XML
6437                 print "<title>$title</title>\n" .
6438                       "<subtitle>$descr</subtitle>\n" .
6439                       '<link rel="alternate" type="text/html" href="' .
6440                       $alt_url . '" />' . "\n" .
6441                       '<link rel="self" type="' . $content_type . '" href="' .
6442                       $cgi->self_url() . '" />' . "\n" .
6443                       "<id>" . href(-full=>1) . "</id>\n" .
6444                       # use project owner for feed author
6445                       "<author><name>$owner</name></author>\n";
6446                 if (defined $favicon) {
6447                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6448                 }
6449                 if (defined $logo_url) {
6450                         # not twice as wide as tall: 72 x 27 pixels
6451                         print "<logo>" . esc_url($logo) . "</logo>\n";
6452                 }
6453                 if (! %latest_date) {
6454                         # dummy date to keep the feed valid until commits trickle in:
6455                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6456                 } else {
6457                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6458                 }
6459                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6460         }
6461
6462         # contents
6463         for (my $i = 0; $i <= $#commitlist; $i++) {
6464                 my %co = %{$commitlist[$i]};
6465                 my $commit = $co{'id'};
6466                 # we read 150, we always show 30 and the ones more recent than 48 hours
6467                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6468                         last;
6469                 }
6470                 my %cd = parse_date($co{'author_epoch'});
6471
6472                 # get list of changed files
6473                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6474                         $co{'parent'} || "--root",
6475                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6476                         or next;
6477                 my @difftree = map { chomp; $_ } <$fd>;
6478                 close $fd
6479                         or next;
6480
6481                 # print element (entry, item)
6482                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6483                 if ($format eq 'rss') {
6484                         print "<item>\n" .
6485                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6486                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6487                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6488                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6489                               "<link>$co_url</link>\n" .
6490                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6491                               "<content:encoded>" .
6492                               "<![CDATA[\n";
6493                 } elsif ($format eq 'atom') {
6494                         print "<entry>\n" .
6495                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6496                               "<updated>$cd{'iso-8601'}</updated>\n" .
6497                               "<author>\n" .
6498                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6499                         if ($co{'author_email'}) {
6500                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6501                         }
6502                         print "</author>\n" .
6503                               # use committer for contributor
6504                               "<contributor>\n" .
6505                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6506                         if ($co{'committer_email'}) {
6507                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6508                         }
6509                         print "</contributor>\n" .
6510                               "<published>$cd{'iso-8601'}</published>\n" .
6511                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6512                               "<id>$co_url</id>\n" .
6513                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6514                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6515                 }
6516                 my $comment = $co{'comment'};
6517                 print "<pre>\n";
6518                 foreach my $line (@$comment) {
6519                         $line = esc_html($line);
6520                         print "$line\n";
6521                 }
6522                 print "</pre><ul>\n";
6523                 foreach my $difftree_line (@difftree) {
6524                         my %difftree = parse_difftree_raw_line($difftree_line);
6525                         next if !$difftree{'from_id'};
6526
6527                         my $file = $difftree{'file'} || $difftree{'to_file'};
6528
6529                         print "<li>" .
6530                               "[" .
6531                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6532                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6533                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6534                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6535                                       -title => "diff"}, 'D');
6536                         if ($have_blame) {
6537                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6538                                                              file_name=>$file, hash_base=>$commit),
6539                                               -title => "blame"}, 'B');
6540                         }
6541                         # if this is not a feed of a file history
6542                         if (!defined $file_name || $file_name ne $file) {
6543                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6544                                                              file_name=>$file, hash=>$commit),
6545                                               -title => "history"}, 'H');
6546                         }
6547                         $file = esc_path($file);
6548                         print "] ".
6549                               "$file</li>\n";
6550                 }
6551                 if ($format eq 'rss') {
6552                         print "</ul>]]>\n" .
6553                               "</content:encoded>\n" .
6554                               "</item>\n";
6555                 } elsif ($format eq 'atom') {
6556                         print "</ul>\n</div>\n" .
6557                               "</content>\n" .
6558                               "</entry>\n";
6559                 }
6560         }
6561
6562         # end of feed
6563         if ($format eq 'rss') {
6564                 print "</channel>\n</rss>\n";
6565         } elsif ($format eq 'atom') {
6566                 print "</feed>\n";
6567         }
6568 }
6569
6570 sub git_rss {
6571         git_feed('rss');
6572 }
6573
6574 sub git_atom {
6575         git_feed('atom');
6576 }
6577
6578 sub git_opml {
6579         my @list = git_get_projects_list();
6580
6581         print $cgi->header(
6582                 -type => 'text/xml',
6583                 -charset => 'utf-8',
6584                 -content_disposition => 'inline; filename="opml.xml"');
6585
6586         print <<XML;
6587 <?xml version="1.0" encoding="utf-8"?>
6588 <opml version="1.0">
6589 <head>
6590   <title>$site_name OPML Export</title>
6591 </head>
6592 <body>
6593 <outline text="git RSS feeds">
6594 XML
6595
6596         foreach my $pr (@list) {
6597                 my %proj = %$pr;
6598                 my $head = git_get_head_hash($proj{'path'});
6599                 if (!defined $head) {
6600                         next;
6601                 }
6602                 $git_dir = "$projectroot/$proj{'path'}";
6603                 my %co = parse_commit($head);
6604                 if (!%co) {
6605                         next;
6606                 }
6607
6608                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6609                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6610                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6611                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6612         }
6613         print <<XML;
6614 </outline>
6615 </body>
6616 </opml>
6617 XML
6618 }