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, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2290                 }
2291         } else {
2292                 $cloud = \%ctags_lc;
2293         }
2294         $cloud;
2295 }
2296
2297 sub git_show_project_tagcloud {
2298         my ($cloud, $count) = @_;
2299         print STDERR ref($cloud)."..\n";
2300         if (ref $cloud eq 'HTML::TagCloud') {
2301                 return $cloud->html_and_css($count);
2302         } else {
2303                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2304                 return '<p align="center">' . join (', ', map {
2305                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2306                 } splice(@tags, 0, $count)) . '</p>';
2307         }
2308 }
2309
2310 sub git_get_project_url_list {
2311         my $path = shift;
2312
2313         $git_dir = "$projectroot/$path";
2314         open my $fd, '<', "$git_dir/cloneurl"
2315                 or return wantarray ?
2316                 @{ config_to_multi(git_get_project_config('url')) } :
2317                    config_to_multi(git_get_project_config('url'));
2318         my @git_project_url_list = map { chomp; $_ } <$fd>;
2319         close $fd;
2320
2321         return wantarray ? @git_project_url_list : \@git_project_url_list;
2322 }
2323
2324 sub git_get_projects_list {
2325         my ($filter) = @_;
2326         my @list;
2327
2328         $filter ||= '';
2329         $filter =~ s/\.git$//;
2330
2331         my $check_forks = gitweb_check_feature('forks');
2332
2333         if (-d $projects_list) {
2334                 # search in directory
2335                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2336                 # remove the trailing "/"
2337                 $dir =~ s!/+$!!;
2338                 my $pfxlen = length("$dir");
2339                 my $pfxdepth = ($dir =~ tr!/!!);
2340
2341                 File::Find::find({
2342                         follow_fast => 1, # follow symbolic links
2343                         follow_skip => 2, # ignore duplicates
2344                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2345                         wanted => sub {
2346                                 # skip project-list toplevel, if we get it.
2347                                 return if (m!^[/.]$!);
2348                                 # only directories can be git repositories
2349                                 return unless (-d $_);
2350                                 # don't traverse too deep (Find is super slow on os x)
2351                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2352                                         $File::Find::prune = 1;
2353                                         return;
2354                                 }
2355
2356                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2357                                 # we check related file in $projectroot
2358                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2359                                 if (check_export_ok("$projectroot/$path")) {
2360                                         push @list, { path => $path };
2361                                         $File::Find::prune = 1;
2362                                 }
2363                         },
2364                 }, "$dir");
2365
2366         } elsif (-f $projects_list) {
2367                 # read from file(url-encoded):
2368                 # 'git%2Fgit.git Linus+Torvalds'
2369                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2370                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2371                 my %paths;
2372                 open my $fd, '<', $projects_list or return;
2373         PROJECT:
2374                 while (my $line = <$fd>) {
2375                         chomp $line;
2376                         my ($path, $owner) = split ' ', $line;
2377                         $path = unescape($path);
2378                         $owner = unescape($owner);
2379                         if (!defined $path) {
2380                                 next;
2381                         }
2382                         if ($filter ne '') {
2383                                 # looking for forks;
2384                                 my $pfx = substr($path, 0, length($filter));
2385                                 if ($pfx ne $filter) {
2386                                         next PROJECT;
2387                                 }
2388                                 my $sfx = substr($path, length($filter));
2389                                 if ($sfx !~ /^\/.*\.git$/) {
2390                                         next PROJECT;
2391                                 }
2392                         } elsif ($check_forks) {
2393                         PATH:
2394                                 foreach my $filter (keys %paths) {
2395                                         # looking for forks;
2396                                         my $pfx = substr($path, 0, length($filter));
2397                                         if ($pfx ne $filter) {
2398                                                 next PATH;
2399                                         }
2400                                         my $sfx = substr($path, length($filter));
2401                                         if ($sfx !~ /^\/.*\.git$/) {
2402                                                 next PATH;
2403                                         }
2404                                         # is a fork, don't include it in
2405                                         # the list
2406                                         next PROJECT;
2407                                 }
2408                         }
2409                         if (check_export_ok("$projectroot/$path")) {
2410                                 my $pr = {
2411                                         path => $path,
2412                                         owner => to_utf8($owner),
2413                                 };
2414                                 push @list, $pr;
2415                                 (my $forks_path = $path) =~ s/\.git$//;
2416                                 $paths{$forks_path}++;
2417                         }
2418                 }
2419                 close $fd;
2420         }
2421         return @list;
2422 }
2423
2424 our $gitweb_project_owner = undef;
2425 sub git_get_project_list_from_file {
2426
2427         return if (defined $gitweb_project_owner);
2428
2429         $gitweb_project_owner = {};
2430         # read from file (url-encoded):
2431         # 'git%2Fgit.git Linus+Torvalds'
2432         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2433         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2434         if (-f $projects_list) {
2435                 open(my $fd, '<', $projects_list);
2436                 while (my $line = <$fd>) {
2437                         chomp $line;
2438                         my ($pr, $ow) = split ' ', $line;
2439                         $pr = unescape($pr);
2440                         $ow = unescape($ow);
2441                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2442                 }
2443                 close $fd;
2444         }
2445 }
2446
2447 sub git_get_project_owner {
2448         my $project = shift;
2449         my $owner;
2450
2451         return undef unless $project;
2452         $git_dir = "$projectroot/$project";
2453
2454         if (!defined $gitweb_project_owner) {
2455                 git_get_project_list_from_file();
2456         }
2457
2458         if (exists $gitweb_project_owner->{$project}) {
2459                 $owner = $gitweb_project_owner->{$project};
2460         }
2461         if (!defined $owner){
2462                 $owner = git_get_project_config('owner');
2463         }
2464         if (!defined $owner) {
2465                 $owner = get_file_owner("$git_dir");
2466         }
2467
2468         return $owner;
2469 }
2470
2471 sub git_get_last_activity {
2472         my ($path) = @_;
2473         my $fd;
2474
2475         $git_dir = "$projectroot/$path";
2476         open($fd, "-|", git_cmd(), 'for-each-ref',
2477              '--format=%(committer)',
2478              '--sort=-committerdate',
2479              '--count=1',
2480              'refs/heads') or return;
2481         my $most_recent = <$fd>;
2482         close $fd or return;
2483         if (defined $most_recent &&
2484             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2485                 my $timestamp = $1;
2486                 my $age = time - $timestamp;
2487                 return ($age, age_string($age));
2488         }
2489         return (undef, undef);
2490 }
2491
2492 sub git_get_references {
2493         my $type = shift || "";
2494         my %refs;
2495         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2496         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2497         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2498                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2499                 or return;
2500
2501         while (my $line = <$fd>) {
2502                 chomp $line;
2503                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2504                         if (defined $refs{$1}) {
2505                                 push @{$refs{$1}}, $2;
2506                         } else {
2507                                 $refs{$1} = [ $2 ];
2508                         }
2509                 }
2510         }
2511         close $fd or return;
2512         return \%refs;
2513 }
2514
2515 sub git_get_rev_name_tags {
2516         my $hash = shift || return undef;
2517
2518         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2519                 or return;
2520         my $name_rev = <$fd>;
2521         close $fd;
2522
2523         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2524                 return $1;
2525         } else {
2526                 # catches also '$hash undefined' output
2527                 return undef;
2528         }
2529 }
2530
2531 ## ----------------------------------------------------------------------
2532 ## parse to hash functions
2533
2534 sub parse_date {
2535         my $epoch = shift;
2536         my $tz = shift || "-0000";
2537
2538         my %date;
2539         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2540         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2541         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2542         $date{'hour'} = $hour;
2543         $date{'minute'} = $min;
2544         $date{'mday'} = $mday;
2545         $date{'day'} = $days[$wday];
2546         $date{'month'} = $months[$mon];
2547         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2548                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2549         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2550                              $mday, $months[$mon], $hour ,$min;
2551         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2552                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2553
2554         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2555         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2556         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2557         $date{'hour_local'} = $hour;
2558         $date{'minute_local'} = $min;
2559         $date{'tz_local'} = $tz;
2560         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2561                                   1900+$year, $mon+1, $mday,
2562                                   $hour, $min, $sec, $tz);
2563         return %date;
2564 }
2565
2566 sub parse_tag {
2567         my $tag_id = shift;
2568         my %tag;
2569         my @comment;
2570
2571         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2572         $tag{'id'} = $tag_id;
2573         while (my $line = <$fd>) {
2574                 chomp $line;
2575                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2576                         $tag{'object'} = $1;
2577                 } elsif ($line =~ m/^type (.+)$/) {
2578                         $tag{'type'} = $1;
2579                 } elsif ($line =~ m/^tag (.+)$/) {
2580                         $tag{'name'} = $1;
2581                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2582                         $tag{'author'} = $1;
2583                         $tag{'author_epoch'} = $2;
2584                         $tag{'author_tz'} = $3;
2585                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2586                                 $tag{'author_name'}  = $1;
2587                                 $tag{'author_email'} = $2;
2588                         } else {
2589                                 $tag{'author_name'} = $tag{'author'};
2590                         }
2591                 } elsif ($line =~ m/--BEGIN/) {
2592                         push @comment, $line;
2593                         last;
2594                 } elsif ($line eq "") {
2595                         last;
2596                 }
2597         }
2598         push @comment, <$fd>;
2599         $tag{'comment'} = \@comment;
2600         close $fd or return;
2601         if (!defined $tag{'name'}) {
2602                 return
2603         };
2604         return %tag
2605 }
2606
2607 sub parse_commit_text {
2608         my ($commit_text, $withparents) = @_;
2609         my @commit_lines = split '\n', $commit_text;
2610         my %co;
2611
2612         pop @commit_lines; # Remove '\0'
2613
2614         if (! @commit_lines) {
2615                 return;
2616         }
2617
2618         my $header = shift @commit_lines;
2619         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2620                 return;
2621         }
2622         ($co{'id'}, my @parents) = split ' ', $header;
2623         while (my $line = shift @commit_lines) {
2624                 last if $line eq "\n";
2625                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2626                         $co{'tree'} = $1;
2627                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2628                         push @parents, $1;
2629                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2630                         $co{'author'} = to_utf8($1);
2631                         $co{'author_epoch'} = $2;
2632                         $co{'author_tz'} = $3;
2633                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2634                                 $co{'author_name'}  = $1;
2635                                 $co{'author_email'} = $2;
2636                         } else {
2637                                 $co{'author_name'} = $co{'author'};
2638                         }
2639                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2640                         $co{'committer'} = to_utf8($1);
2641                         $co{'committer_epoch'} = $2;
2642                         $co{'committer_tz'} = $3;
2643                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2644                                 $co{'committer_name'}  = $1;
2645                                 $co{'committer_email'} = $2;
2646                         } else {
2647                                 $co{'committer_name'} = $co{'committer'};
2648                         }
2649                 }
2650         }
2651         if (!defined $co{'tree'}) {
2652                 return;
2653         };
2654         $co{'parents'} = \@parents;
2655         $co{'parent'} = $parents[0];
2656
2657         foreach my $title (@commit_lines) {
2658                 $title =~ s/^    //;
2659                 if ($title ne "") {
2660                         $co{'title'} = chop_str($title, 80, 5);
2661                         # remove leading stuff of merges to make the interesting part visible
2662                         if (length($title) > 50) {
2663                                 $title =~ s/^Automatic //;
2664                                 $title =~ s/^merge (of|with) /Merge ... /i;
2665                                 if (length($title) > 50) {
2666                                         $title =~ s/(http|rsync):\/\///;
2667                                 }
2668                                 if (length($title) > 50) {
2669                                         $title =~ s/(master|www|rsync)\.//;
2670                                 }
2671                                 if (length($title) > 50) {
2672                                         $title =~ s/kernel.org:?//;
2673                                 }
2674                                 if (length($title) > 50) {
2675                                         $title =~ s/\/pub\/scm//;
2676                                 }
2677                         }
2678                         $co{'title_short'} = chop_str($title, 50, 5);
2679                         last;
2680                 }
2681         }
2682         if (! defined $co{'title'} || $co{'title'} eq "") {
2683                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2684         }
2685         # remove added spaces
2686         foreach my $line (@commit_lines) {
2687                 $line =~ s/^    //;
2688         }
2689         $co{'comment'} = \@commit_lines;
2690
2691         my $age = time - $co{'committer_epoch'};
2692         $co{'age'} = $age;
2693         $co{'age_string'} = age_string($age);
2694         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2695         if ($age > 60*60*24*7*2) {
2696                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2697                 $co{'age_string_age'} = $co{'age_string'};
2698         } else {
2699                 $co{'age_string_date'} = $co{'age_string'};
2700                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2701         }
2702         return %co;
2703 }
2704
2705 sub parse_commit {
2706         my ($commit_id) = @_;
2707         my %co;
2708
2709         local $/ = "\0";
2710
2711         open my $fd, "-|", git_cmd(), "rev-list",
2712                 "--parents",
2713                 "--header",
2714                 "--max-count=1",
2715                 $commit_id,
2716                 "--",
2717                 or die_error(500, "Open git-rev-list failed");
2718         %co = parse_commit_text(<$fd>, 1);
2719         close $fd;
2720
2721         return %co;
2722 }
2723
2724 sub parse_commits {
2725         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2726         my @cos;
2727
2728         $maxcount ||= 1;
2729         $skip ||= 0;
2730
2731         local $/ = "\0";
2732
2733         open my $fd, "-|", git_cmd(), "rev-list",
2734                 "--header",
2735                 @args,
2736                 ("--max-count=" . $maxcount),
2737                 ("--skip=" . $skip),
2738                 @extra_options,
2739                 $commit_id,
2740                 "--",
2741                 ($filename ? ($filename) : ())
2742                 or die_error(500, "Open git-rev-list failed");
2743         while (my $line = <$fd>) {
2744                 my %co = parse_commit_text($line);
2745                 push @cos, \%co;
2746         }
2747         close $fd;
2748
2749         return wantarray ? @cos : \@cos;
2750 }
2751
2752 # parse line of git-diff-tree "raw" output
2753 sub parse_difftree_raw_line {
2754         my $line = shift;
2755         my %res;
2756
2757         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2758         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2759         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2760                 $res{'from_mode'} = $1;
2761                 $res{'to_mode'} = $2;
2762                 $res{'from_id'} = $3;
2763                 $res{'to_id'} = $4;
2764                 $res{'status'} = $5;
2765                 $res{'similarity'} = $6;
2766                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2767                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2768                 } else {
2769                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2770                 }
2771         }
2772         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2773         # combined diff (for merge commit)
2774         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2775                 $res{'nparents'}  = length($1);
2776                 $res{'from_mode'} = [ split(' ', $2) ];
2777                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2778                 $res{'from_id'} = [ split(' ', $3) ];
2779                 $res{'to_id'} = pop @{$res{'from_id'}};
2780                 $res{'status'} = [ split('', $4) ];
2781                 $res{'to_file'} = unquote($5);
2782         }
2783         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2784         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2785                 $res{'commit'} = $1;
2786         }
2787
2788         return wantarray ? %res : \%res;
2789 }
2790
2791 # wrapper: return parsed line of git-diff-tree "raw" output
2792 # (the argument might be raw line, or parsed info)
2793 sub parsed_difftree_line {
2794         my $line_or_ref = shift;
2795
2796         if (ref($line_or_ref) eq "HASH") {
2797                 # pre-parsed (or generated by hand)
2798                 return $line_or_ref;
2799         } else {
2800                 return parse_difftree_raw_line($line_or_ref);
2801         }
2802 }
2803
2804 # parse line of git-ls-tree output
2805 sub parse_ls_tree_line {
2806         my $line = shift;
2807         my %opts = @_;
2808         my %res;
2809
2810         if ($opts{'-l'}) {
2811                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2812                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2813
2814                 $res{'mode'} = $1;
2815                 $res{'type'} = $2;
2816                 $res{'hash'} = $3;
2817                 $res{'size'} = $4;
2818                 if ($opts{'-z'}) {
2819                         $res{'name'} = $5;
2820                 } else {
2821                         $res{'name'} = unquote($5);
2822                 }
2823         } else {
2824                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2825                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2826
2827                 $res{'mode'} = $1;
2828                 $res{'type'} = $2;
2829                 $res{'hash'} = $3;
2830                 if ($opts{'-z'}) {
2831                         $res{'name'} = $4;
2832                 } else {
2833                         $res{'name'} = unquote($4);
2834                 }
2835         }
2836
2837         return wantarray ? %res : \%res;
2838 }
2839
2840 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2841 sub parse_from_to_diffinfo {
2842         my ($diffinfo, $from, $to, @parents) = @_;
2843
2844         if ($diffinfo->{'nparents'}) {
2845                 # combined diff
2846                 $from->{'file'} = [];
2847                 $from->{'href'} = [];
2848                 fill_from_file_info($diffinfo, @parents)
2849                         unless exists $diffinfo->{'from_file'};
2850                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2851                         $from->{'file'}[$i] =
2852                                 defined $diffinfo->{'from_file'}[$i] ?
2853                                         $diffinfo->{'from_file'}[$i] :
2854                                         $diffinfo->{'to_file'};
2855                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2856                                 $from->{'href'}[$i] = href(action=>"blob",
2857                                                            hash_base=>$parents[$i],
2858                                                            hash=>$diffinfo->{'from_id'}[$i],
2859                                                            file_name=>$from->{'file'}[$i]);
2860                         } else {
2861                                 $from->{'href'}[$i] = undef;
2862                         }
2863                 }
2864         } else {
2865                 # ordinary (not combined) diff
2866                 $from->{'file'} = $diffinfo->{'from_file'};
2867                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2868                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2869                                                hash=>$diffinfo->{'from_id'},
2870                                                file_name=>$from->{'file'});
2871                 } else {
2872                         delete $from->{'href'};
2873                 }
2874         }
2875
2876         $to->{'file'} = $diffinfo->{'to_file'};
2877         if (!is_deleted($diffinfo)) { # file exists in result
2878                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2879                                      hash=>$diffinfo->{'to_id'},
2880                                      file_name=>$to->{'file'});
2881         } else {
2882                 delete $to->{'href'};
2883         }
2884 }
2885
2886 ## ......................................................................
2887 ## parse to array of hashes functions
2888
2889 sub git_get_heads_list {
2890         my $limit = shift;
2891         my @headslist;
2892
2893         open my $fd, '-|', git_cmd(), 'for-each-ref',
2894                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2895                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2896                 'refs/heads'
2897                 or return;
2898         while (my $line = <$fd>) {
2899                 my %ref_item;
2900
2901                 chomp $line;
2902                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2903                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2904                 my ($committer, $epoch, $tz) =
2905                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2906                 $ref_item{'fullname'}  = $name;
2907                 $name =~ s!^refs/heads/!!;
2908
2909                 $ref_item{'name'}  = $name;
2910                 $ref_item{'id'}    = $hash;
2911                 $ref_item{'title'} = $title || '(no commit message)';
2912                 $ref_item{'epoch'} = $epoch;
2913                 if ($epoch) {
2914                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2915                 } else {
2916                         $ref_item{'age'} = "unknown";
2917                 }
2918
2919                 push @headslist, \%ref_item;
2920         }
2921         close $fd;
2922
2923         return wantarray ? @headslist : \@headslist;
2924 }
2925
2926 sub git_get_tags_list {
2927         my $limit = shift;
2928         my @tagslist;
2929
2930         open my $fd, '-|', git_cmd(), 'for-each-ref',
2931                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2932                 '--format=%(objectname) %(objecttype) %(refname) '.
2933                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2934                 'refs/tags'
2935                 or return;
2936         while (my $line = <$fd>) {
2937                 my %ref_item;
2938
2939                 chomp $line;
2940                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2941                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2942                 my ($creator, $epoch, $tz) =
2943                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2944                 $ref_item{'fullname'} = $name;
2945                 $name =~ s!^refs/tags/!!;
2946
2947                 $ref_item{'type'} = $type;
2948                 $ref_item{'id'} = $id;
2949                 $ref_item{'name'} = $name;
2950                 if ($type eq "tag") {
2951                         $ref_item{'subject'} = $title;
2952                         $ref_item{'reftype'} = $reftype;
2953                         $ref_item{'refid'}   = $refid;
2954                 } else {
2955                         $ref_item{'reftype'} = $type;
2956                         $ref_item{'refid'}   = $id;
2957                 }
2958
2959                 if ($type eq "tag" || $type eq "commit") {
2960                         $ref_item{'epoch'} = $epoch;
2961                         if ($epoch) {
2962                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2963                         } else {
2964                                 $ref_item{'age'} = "unknown";
2965                         }
2966                 }
2967
2968                 push @tagslist, \%ref_item;
2969         }
2970         close $fd;
2971
2972         return wantarray ? @tagslist : \@tagslist;
2973 }
2974
2975 ## ----------------------------------------------------------------------
2976 ## filesystem-related functions
2977
2978 sub get_file_owner {
2979         my $path = shift;
2980
2981         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2982         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2983         if (!defined $gcos) {
2984                 return undef;
2985         }
2986         my $owner = $gcos;
2987         $owner =~ s/[,;].*$//;
2988         return to_utf8($owner);
2989 }
2990
2991 # assume that file exists
2992 sub insert_file {
2993         my $filename = shift;
2994
2995         open my $fd, '<', $filename;
2996         print map { to_utf8($_) } <$fd>;
2997         close $fd;
2998 }
2999
3000 ## ......................................................................
3001 ## mimetype related functions
3002
3003 sub mimetype_guess_file {
3004         my $filename = shift;
3005         my $mimemap = shift;
3006         -r $mimemap or return undef;
3007
3008         my %mimemap;
3009         open(my $mh, '<', $mimemap) or return undef;
3010         while (<$mh>) {
3011                 next if m/^#/; # skip comments
3012                 my ($mimetype, $exts) = split(/\t+/);
3013                 if (defined $exts) {
3014                         my @exts = split(/\s+/, $exts);
3015                         foreach my $ext (@exts) {
3016                                 $mimemap{$ext} = $mimetype;
3017                         }
3018                 }
3019         }
3020         close($mh);
3021
3022         $filename =~ /\.([^.]*)$/;
3023         return $mimemap{$1};
3024 }
3025
3026 sub mimetype_guess {
3027         my $filename = shift;
3028         my $mime;
3029         $filename =~ /\./ or return undef;
3030
3031         if ($mimetypes_file) {
3032                 my $file = $mimetypes_file;
3033                 if ($file !~ m!^/!) { # if it is relative path
3034                         # it is relative to project
3035                         $file = "$projectroot/$project/$file";
3036                 }
3037                 $mime = mimetype_guess_file($filename, $file);
3038         }
3039         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3040         return $mime;
3041 }
3042
3043 sub blob_mimetype {
3044         my $fd = shift;
3045         my $filename = shift;
3046
3047         if ($filename) {
3048                 my $mime = mimetype_guess($filename);
3049                 $mime and return $mime;
3050         }
3051
3052         # just in case
3053         return $default_blob_plain_mimetype unless $fd;
3054
3055         if (-T $fd) {
3056                 return 'text/plain';
3057         } elsif (! $filename) {
3058                 return 'application/octet-stream';
3059         } elsif ($filename =~ m/\.png$/i) {
3060                 return 'image/png';
3061         } elsif ($filename =~ m/\.gif$/i) {
3062                 return 'image/gif';
3063         } elsif ($filename =~ m/\.jpe?g$/i) {
3064                 return 'image/jpeg';
3065         } else {
3066                 return 'application/octet-stream';
3067         }
3068 }
3069
3070 sub blob_contenttype {
3071         my ($fd, $file_name, $type) = @_;
3072
3073         $type ||= blob_mimetype($fd, $file_name);
3074         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3075                 $type .= "; charset=$default_text_plain_charset";
3076         }
3077
3078         return $type;
3079 }
3080
3081 ## ======================================================================
3082 ## functions printing HTML: header, footer, error page
3083
3084 sub git_header_html {
3085         my $status = shift || "200 OK";
3086         my $expires = shift;
3087
3088         my $title = "$site_name";
3089         if (defined $project) {
3090                 $title .= " - " . to_utf8($project);
3091                 if (defined $action) {
3092                         $title .= "/$action";
3093                         if (defined $file_name) {
3094                                 $title .= " - " . esc_path($file_name);
3095                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3096                                         $title .= "/";
3097                                 }
3098                         }
3099                 }
3100         }
3101         my $content_type;
3102         # require explicit support from the UA if we are to send the page as
3103         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3104         # we have to do this because MSIE sometimes globs '*/*', pretending to
3105         # support xhtml+xml but choking when it gets what it asked for.
3106         if (defined $cgi->http('HTTP_ACCEPT') &&
3107             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3108             $cgi->Accept('application/xhtml+xml') != 0) {
3109                 $content_type = 'application/xhtml+xml';
3110         } else {
3111                 $content_type = 'text/html';
3112         }
3113         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3114                            -status=> $status, -expires => $expires);
3115         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3116         print <<EOF;
3117 <?xml version="1.0" encoding="utf-8"?>
3118 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3119 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3120 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3121 <!-- git core binaries version $git_version -->
3122 <head>
3123 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3124 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3125 <meta name="robots" content="index, nofollow"/>
3126 <title>$title</title>
3127 EOF
3128         # the stylesheet, favicon etc urls won't work correctly with path_info
3129         # unless we set the appropriate base URL
3130         if ($ENV{'PATH_INFO'}) {
3131                 print "<base href=\"".esc_url($base_url)."\" />\n";
3132         }
3133         # print out each stylesheet that exist, providing backwards capability
3134         # for those people who defined $stylesheet in a config file
3135         if (defined $stylesheet) {
3136                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3137         } else {
3138                 foreach my $stylesheet (@stylesheets) {
3139                         next unless $stylesheet;
3140                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3141                 }
3142         }
3143         if (defined $project) {
3144                 my %href_params = get_feed_info();
3145                 if (!exists $href_params{'-title'}) {
3146                         $href_params{'-title'} = 'log';
3147                 }
3148
3149                 foreach my $format qw(RSS Atom) {
3150                         my $type = lc($format);
3151                         my %link_attr = (
3152                                 '-rel' => 'alternate',
3153                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3154                                 '-type' => "application/$type+xml"
3155                         );
3156
3157                         $href_params{'action'} = $type;
3158                         $link_attr{'-href'} = href(%href_params);
3159                         print "<link ".
3160                               "rel=\"$link_attr{'-rel'}\" ".
3161                               "title=\"$link_attr{'-title'}\" ".
3162                               "href=\"$link_attr{'-href'}\" ".
3163                               "type=\"$link_attr{'-type'}\" ".
3164                               "/>\n";
3165
3166                         $href_params{'extra_options'} = '--no-merges';
3167                         $link_attr{'-href'} = href(%href_params);
3168                         $link_attr{'-title'} .= ' (no merges)';
3169                         print "<link ".
3170                               "rel=\"$link_attr{'-rel'}\" ".
3171                               "title=\"$link_attr{'-title'}\" ".
3172                               "href=\"$link_attr{'-href'}\" ".
3173                               "type=\"$link_attr{'-type'}\" ".
3174                               "/>\n";
3175                 }
3176
3177         } else {
3178                 printf('<link rel="alternate" title="%s projects list" '.
3179                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3180                        $site_name, href(project=>undef, action=>"project_index"));
3181                 printf('<link rel="alternate" title="%s projects feeds" '.
3182                        'href="%s" type="text/x-opml" />'."\n",
3183                        $site_name, href(project=>undef, action=>"opml"));
3184         }
3185         if (defined $favicon) {
3186                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3187         }
3188
3189         print "</head>\n" .
3190               "<body>\n";
3191
3192         if (-f $site_header) {
3193                 insert_file($site_header);
3194         }
3195
3196         print "<div class=\"page_header\">\n" .
3197               $cgi->a({-href => esc_url($logo_url),
3198                        -title => $logo_label},
3199                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3200         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3201         if (defined $project) {
3202                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3203                 if (defined $action) {
3204                         print " / $action";
3205                 }
3206                 print "\n";
3207         }
3208         print "</div>\n";
3209
3210         my $have_search = gitweb_check_feature('search');
3211         if (defined $project && $have_search) {
3212                 if (!defined $searchtext) {
3213                         $searchtext = "";
3214                 }
3215                 my $search_hash;
3216                 if (defined $hash_base) {
3217                         $search_hash = $hash_base;
3218                 } elsif (defined $hash) {
3219                         $search_hash = $hash;
3220                 } else {
3221                         $search_hash = "HEAD";
3222                 }
3223                 my $action = $my_uri;
3224                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3225                 if ($use_pathinfo) {
3226                         $action .= "/".esc_url($project);
3227                 }
3228                 print $cgi->startform(-method => "get", -action => $action) .
3229                       "<div class=\"search\">\n" .
3230                       (!$use_pathinfo &&
3231                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3232                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3233                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3234                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3235                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3236                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3237                       " search:\n",
3238                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3239                       "<span title=\"Extended regular expression\">" .
3240                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3241                                      -checked => $search_use_regexp) .
3242                       "</span>" .
3243                       "</div>" .
3244                       $cgi->end_form() . "\n";
3245         }
3246 }
3247
3248 sub git_footer_html {
3249         my $feed_class = 'rss_logo';
3250
3251         print "<div class=\"page_footer\">\n";
3252         if (defined $project) {
3253                 my $descr = git_get_project_description($project);
3254                 if (defined $descr) {
3255                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3256                 }
3257
3258                 my %href_params = get_feed_info();
3259                 if (!%href_params) {
3260                         $feed_class .= ' generic';
3261                 }
3262                 $href_params{'-title'} ||= 'log';
3263
3264                 foreach my $format qw(RSS Atom) {
3265                         $href_params{'action'} = lc($format);
3266                         print $cgi->a({-href => href(%href_params),
3267                                       -title => "$href_params{'-title'} $format feed",
3268                                       -class => $feed_class}, $format)."\n";
3269                 }
3270
3271         } else {
3272                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3273                               -class => $feed_class}, "OPML") . " ";
3274                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3275                               -class => $feed_class}, "TXT") . "\n";
3276         }
3277         print "</div>\n"; # class="page_footer"
3278
3279         if (-f $site_footer) {
3280                 insert_file($site_footer);
3281         }
3282
3283         print "</body>\n" .
3284               "</html>";
3285 }
3286
3287 # die_error(<http_status_code>, <error_message>)
3288 # Example: die_error(404, 'Hash not found')
3289 # By convention, use the following status codes (as defined in RFC 2616):
3290 # 400: Invalid or missing CGI parameters, or
3291 #      requested object exists but has wrong type.
3292 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3293 #      this server or project.
3294 # 404: Requested object/revision/project doesn't exist.
3295 # 500: The server isn't configured properly, or
3296 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3297 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3298 sub die_error {
3299         my $status = shift || 500;
3300         my $error = shift || "Internal server error";
3301
3302         my %http_responses = (400 => '400 Bad Request',
3303                               403 => '403 Forbidden',
3304                               404 => '404 Not Found',
3305                               500 => '500 Internal Server Error');
3306         git_header_html($http_responses{$status});
3307         print <<EOF;
3308 <div class="page_body">
3309 <br /><br />
3310 $status - $error
3311 <br />
3312 </div>
3313 EOF
3314         git_footer_html();
3315         exit;
3316 }
3317
3318 ## ----------------------------------------------------------------------
3319 ## functions printing or outputting HTML: navigation
3320
3321 sub git_print_page_nav {
3322         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3323         $extra = '' if !defined $extra; # pager or formats
3324
3325         my @navs = qw(summary shortlog log commit commitdiff tree);
3326         if ($suppress) {
3327                 @navs = grep { $_ ne $suppress } @navs;
3328         }
3329
3330         my %arg = map { $_ => {action=>$_} } @navs;
3331         if (defined $head) {
3332                 for (qw(commit commitdiff)) {
3333                         $arg{$_}{'hash'} = $head;
3334                 }
3335                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3336                         for (qw(shortlog log)) {
3337                                 $arg{$_}{'hash'} = $head;
3338                         }
3339                 }
3340         }
3341
3342         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3343         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3344
3345         my @actions = gitweb_get_feature('actions');
3346         my %repl = (
3347                 '%' => '%',
3348                 'n' => $project,         # project name
3349                 'f' => $git_dir,         # project path within filesystem
3350                 'h' => $treehead || '',  # current hash ('h' parameter)
3351                 'b' => $treebase || '',  # hash base ('hb' parameter)
3352         );
3353         while (@actions) {
3354                 my ($label, $link, $pos) = splice(@actions,0,3);
3355                 # insert
3356                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3357                 # munch munch
3358                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3359                 $arg{$label}{'_href'} = $link;
3360         }
3361
3362         print "<div class=\"page_nav\">\n" .
3363                 (join " | ",
3364                  map { $_ eq $current ?
3365                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3366                  } @navs);
3367         print "<br/>\n$extra<br/>\n" .
3368               "</div>\n";
3369 }
3370
3371 sub format_paging_nav {
3372         my ($action, $hash, $head, $page, $has_next_link) = @_;
3373         my $paging_nav;
3374
3375
3376         if ($hash ne $head || $page) {
3377                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3378         } else {
3379                 $paging_nav .= "HEAD";
3380         }
3381
3382         if ($page > 0) {
3383                 $paging_nav .= " &sdot; " .
3384                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3385                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3386         } else {
3387                 $paging_nav .= " &sdot; prev";
3388         }
3389
3390         if ($has_next_link) {
3391                 $paging_nav .= " &sdot; " .
3392                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3393                                  -accesskey => "n", -title => "Alt-n"}, "next");
3394         } else {
3395                 $paging_nav .= " &sdot; next";
3396         }
3397
3398         return $paging_nav;
3399 }
3400
3401 ## ......................................................................
3402 ## functions printing or outputting HTML: div
3403
3404 sub git_print_header_div {
3405         my ($action, $title, $hash, $hash_base) = @_;
3406         my %args = ();
3407
3408         $args{'action'} = $action;
3409         $args{'hash'} = $hash if $hash;
3410         $args{'hash_base'} = $hash_base if $hash_base;
3411
3412         print "<div class=\"header\">\n" .
3413               $cgi->a({-href => href(%args), -class => "title"},
3414               $title ? $title : $action) .
3415               "\n</div>\n";
3416 }
3417
3418 sub print_local_time {
3419         my %date = @_;
3420         if ($date{'hour_local'} < 6) {
3421                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3422                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3423         } else {
3424                 printf(" (%02d:%02d %s)",
3425                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3426         }
3427 }
3428
3429 # Outputs the author name and date in long form
3430 sub git_print_authorship {
3431         my $co = shift;
3432         my %opts = @_;
3433         my $tag = $opts{-tag} || 'div';
3434         my $author = $co->{'author_name'};
3435
3436         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3437         print "<$tag class=\"author_date\">" .
3438               format_search_author($author, "author", esc_html($author)) .
3439               " [$ad{'rfc2822'}";
3440         print_local_time(%ad) if ($opts{-localtime});
3441         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3442                   . "</$tag>\n";
3443 }
3444
3445 # Outputs table rows containing the full author or committer information,
3446 # in the format expected for 'commit' view (& similia).
3447 # Parameters are a commit hash reference, followed by the list of people
3448 # to output information for. If the list is empty it defalts to both
3449 # author and committer.
3450 sub git_print_authorship_rows {
3451         my $co = shift;
3452         # too bad we can't use @people = @_ || ('author', 'committer')
3453         my @people = @_;
3454         @people = ('author', 'committer') unless @people;
3455         foreach my $who (@people) {
3456                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3457                 print "<tr><td>$who</td><td>" .
3458                       format_search_author($co->{"${who}_name"}, $who,
3459                                esc_html($co->{"${who}_name"})) . " " .
3460                       format_search_author($co->{"${who}_email"}, $who,
3461                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3462                       "</td><td rowspan=\"2\">" .
3463                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3464                       "</td></tr>\n" .
3465                       "<tr>" .
3466                       "<td></td><td> $wd{'rfc2822'}";
3467                 print_local_time(%wd);
3468                 print "</td>" .
3469                       "</tr>\n";
3470         }
3471 }
3472
3473 sub git_print_page_path {
3474         my $name = shift;
3475         my $type = shift;
3476         my $hb = shift;
3477
3478
3479         print "<div class=\"page_path\">";
3480         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3481                       -title => 'tree root'}, to_utf8("[$project]"));
3482         print " / ";
3483         if (defined $name) {
3484                 my @dirname = split '/', $name;
3485                 my $basename = pop @dirname;
3486                 my $fullname = '';
3487
3488                 foreach my $dir (@dirname) {
3489                         $fullname .= ($fullname ? '/' : '') . $dir;
3490                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3491                                                      hash_base=>$hb),
3492                                       -title => $fullname}, esc_path($dir));
3493                         print " / ";
3494                 }
3495                 if (defined $type && $type eq 'blob') {
3496                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3497                                                      hash_base=>$hb),
3498                                       -title => $name}, esc_path($basename));
3499                 } elsif (defined $type && $type eq 'tree') {
3500                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3501                                                      hash_base=>$hb),
3502                                       -title => $name}, esc_path($basename));
3503                         print " / ";
3504                 } else {
3505                         print esc_path($basename);
3506                 }
3507         }
3508         print "<br/></div>\n";
3509 }
3510
3511 sub git_print_log {
3512         my $log = shift;
3513         my %opts = @_;
3514
3515         if ($opts{'-remove_title'}) {
3516                 # remove title, i.e. first line of log
3517                 shift @$log;
3518         }
3519         # remove leading empty lines
3520         while (defined $log->[0] && $log->[0] eq "") {
3521                 shift @$log;
3522         }
3523
3524         # print log
3525         my $signoff = 0;
3526         my $empty = 0;
3527         foreach my $line (@$log) {
3528                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3529                         $signoff = 1;
3530                         $empty = 0;
3531                         if (! $opts{'-remove_signoff'}) {
3532                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3533                                 next;
3534                         } else {
3535                                 # remove signoff lines
3536                                 next;
3537                         }
3538                 } else {
3539                         $signoff = 0;
3540                 }
3541
3542                 # print only one empty line
3543                 # do not print empty line after signoff
3544                 if ($line eq "") {
3545                         next if ($empty || $signoff);
3546                         $empty = 1;
3547                 } else {
3548                         $empty = 0;
3549                 }
3550
3551                 print format_log_line_html($line) . "<br/>\n";
3552         }
3553
3554         if ($opts{'-final_empty_line'}) {
3555                 # end with single empty line
3556                 print "<br/>\n" unless $empty;
3557         }
3558 }
3559
3560 # return link target (what link points to)
3561 sub git_get_link_target {
3562         my $hash = shift;
3563         my $link_target;
3564
3565         # read link
3566         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3567                 or return;
3568         {
3569                 local $/ = undef;
3570                 $link_target = <$fd>;
3571         }
3572         close $fd
3573                 or return;
3574
3575         return $link_target;
3576 }
3577
3578 # given link target, and the directory (basedir) the link is in,
3579 # return target of link relative to top directory (top tree);
3580 # return undef if it is not possible (including absolute links).
3581 sub normalize_link_target {
3582         my ($link_target, $basedir) = @_;
3583
3584         # absolute symlinks (beginning with '/') cannot be normalized
3585         return if (substr($link_target, 0, 1) eq '/');
3586
3587         # normalize link target to path from top (root) tree (dir)
3588         my $path;
3589         if ($basedir) {
3590                 $path = $basedir . '/' . $link_target;
3591         } else {
3592                 # we are in top (root) tree (dir)
3593                 $path = $link_target;
3594         }
3595
3596         # remove //, /./, and /../
3597         my @path_parts;
3598         foreach my $part (split('/', $path)) {
3599                 # discard '.' and ''
3600                 next if (!$part || $part eq '.');
3601                 # handle '..'
3602                 if ($part eq '..') {
3603                         if (@path_parts) {
3604                                 pop @path_parts;
3605                         } else {
3606                                 # link leads outside repository (outside top dir)
3607                                 return;
3608                         }
3609                 } else {
3610                         push @path_parts, $part;
3611                 }
3612         }
3613         $path = join('/', @path_parts);
3614
3615         return $path;
3616 }
3617
3618 # print tree entry (row of git_tree), but without encompassing <tr> element
3619 sub git_print_tree_entry {
3620         my ($t, $basedir, $hash_base, $have_blame) = @_;
3621
3622         my %base_key = ();
3623         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3624
3625         # The format of a table row is: mode list link.  Where mode is
3626         # the mode of the entry, list is the name of the entry, an href,
3627         # and link is the action links of the entry.
3628
3629         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3630         if (exists $t->{'size'}) {
3631                 print "<td class=\"size\">$t->{'size'}</td>\n";
3632         }
3633         if ($t->{'type'} eq "blob") {
3634                 print "<td class=\"list\">" .
3635                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3636                                                file_name=>"$basedir$t->{'name'}", %base_key),
3637                                 -class => "list"}, esc_path($t->{'name'}));
3638                 if (S_ISLNK(oct $t->{'mode'})) {
3639                         my $link_target = git_get_link_target($t->{'hash'});
3640                         if ($link_target) {
3641                                 my $norm_target = normalize_link_target($link_target, $basedir);
3642                                 if (defined $norm_target) {
3643                                         print " -> " .
3644                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3645                                                                      file_name=>$norm_target),
3646                                                        -title => $norm_target}, esc_path($link_target));
3647                                 } else {
3648                                         print " -> " . esc_path($link_target);
3649                                 }
3650                         }
3651                 }
3652                 print "</td>\n";
3653                 print "<td class=\"link\">";
3654                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3655                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3656                               "blob");
3657                 if ($have_blame) {
3658                         print " | " .
3659                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3660                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3661                                       "blame");
3662                 }
3663                 if (defined $hash_base) {
3664                         print " | " .
3665                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3666                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3667                                       "history");
3668                 }
3669                 print " | " .
3670                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3671                                                file_name=>"$basedir$t->{'name'}")},
3672                                 "raw");
3673                 print "</td>\n";
3674
3675         } elsif ($t->{'type'} eq "tree") {
3676                 print "<td class=\"list\">";
3677                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3678                                              file_name=>"$basedir$t->{'name'}",
3679                                              %base_key)},
3680                               esc_path($t->{'name'}));
3681                 print "</td>\n";
3682                 print "<td class=\"link\">";
3683                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3684                                              file_name=>"$basedir$t->{'name'}",
3685                                              %base_key)},
3686                               "tree");
3687                 if (defined $hash_base) {
3688                         print " | " .
3689                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3690                                                      file_name=>"$basedir$t->{'name'}")},
3691                                       "history");
3692                 }
3693                 print "</td>\n";
3694         } else {
3695                 # unknown object: we can only present history for it
3696                 # (this includes 'commit' object, i.e. submodule support)
3697                 print "<td class=\"list\">" .
3698                       esc_path($t->{'name'}) .
3699                       "</td>\n";
3700                 print "<td class=\"link\">";
3701                 if (defined $hash_base) {
3702                         print $cgi->a({-href => href(action=>"history",
3703                                                      hash_base=>$hash_base,
3704                                                      file_name=>"$basedir$t->{'name'}")},
3705                                       "history");
3706                 }
3707                 print "</td>\n";
3708         }
3709 }
3710
3711 ## ......................................................................
3712 ## functions printing large fragments of HTML
3713
3714 # get pre-image filenames for merge (combined) diff
3715 sub fill_from_file_info {
3716         my ($diff, @parents) = @_;
3717
3718         $diff->{'from_file'} = [ ];
3719         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3720         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3721                 if ($diff->{'status'}[$i] eq 'R' ||
3722                     $diff->{'status'}[$i] eq 'C') {
3723                         $diff->{'from_file'}[$i] =
3724                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3725                 }
3726         }
3727
3728         return $diff;
3729 }
3730
3731 # is current raw difftree line of file deletion
3732 sub is_deleted {
3733         my $diffinfo = shift;
3734
3735         return $diffinfo->{'to_id'} eq ('0' x 40);
3736 }
3737
3738 # does patch correspond to [previous] difftree raw line
3739 # $diffinfo  - hashref of parsed raw diff format
3740 # $patchinfo - hashref of parsed patch diff format
3741 #              (the same keys as in $diffinfo)
3742 sub is_patch_split {
3743         my ($diffinfo, $patchinfo) = @_;
3744
3745         return defined $diffinfo && defined $patchinfo
3746                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3747 }
3748
3749
3750 sub git_difftree_body {
3751         my ($difftree, $hash, @parents) = @_;
3752         my ($parent) = $parents[0];
3753         my $have_blame = gitweb_check_feature('blame');
3754         print "<div class=\"list_head\">\n";
3755         if ($#{$difftree} > 10) {
3756                 print(($#{$difftree} + 1) . " files changed:\n");
3757         }
3758         print "</div>\n";
3759
3760         print "<table class=\"" .
3761               (@parents > 1 ? "combined " : "") .
3762               "diff_tree\">\n";
3763
3764         # header only for combined diff in 'commitdiff' view
3765         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3766         if ($has_header) {
3767                 # table header
3768                 print "<thead><tr>\n" .
3769                        "<th></th><th></th>\n"; # filename, patchN link
3770                 for (my $i = 0; $i < @parents; $i++) {
3771                         my $par = $parents[$i];
3772                         print "<th>" .
3773                               $cgi->a({-href => href(action=>"commitdiff",
3774                                                      hash=>$hash, hash_parent=>$par),
3775                                        -title => 'commitdiff to parent number ' .
3776                                                   ($i+1) . ': ' . substr($par,0,7)},
3777                                       $i+1) .
3778                               "&nbsp;</th>\n";
3779                 }
3780                 print "</tr></thead>\n<tbody>\n";
3781         }
3782
3783         my $alternate = 1;
3784         my $patchno = 0;
3785         foreach my $line (@{$difftree}) {
3786                 my $diff = parsed_difftree_line($line);
3787
3788                 if ($alternate) {
3789                         print "<tr class=\"dark\">\n";
3790                 } else {
3791                         print "<tr class=\"light\">\n";
3792                 }
3793                 $alternate ^= 1;
3794
3795                 if (exists $diff->{'nparents'}) { # combined diff
3796
3797                         fill_from_file_info($diff, @parents)
3798                                 unless exists $diff->{'from_file'};
3799
3800                         if (!is_deleted($diff)) {
3801                                 # file exists in the result (child) commit
3802                                 print "<td>" .
3803                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3804                                                              file_name=>$diff->{'to_file'},
3805                                                              hash_base=>$hash),
3806                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3807                                       "</td>\n";
3808                         } else {
3809                                 print "<td>" .
3810                                       esc_path($diff->{'to_file'}) .
3811                                       "</td>\n";
3812                         }
3813
3814                         if ($action eq 'commitdiff') {
3815                                 # link to patch
3816                                 $patchno++;
3817                                 print "<td class=\"link\">" .
3818                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3819                                       " | " .
3820                                       "</td>\n";
3821                         }
3822
3823                         my $has_history = 0;
3824                         my $not_deleted = 0;
3825                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3826                                 my $hash_parent = $parents[$i];
3827                                 my $from_hash = $diff->{'from_id'}[$i];
3828                                 my $from_path = $diff->{'from_file'}[$i];
3829                                 my $status = $diff->{'status'}[$i];
3830
3831                                 $has_history ||= ($status ne 'A');
3832                                 $not_deleted ||= ($status ne 'D');
3833
3834                                 if ($status eq 'A') {
3835                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3836                                 } elsif ($status eq 'D') {
3837                                         print "<td class=\"link\">" .
3838                                               $cgi->a({-href => href(action=>"blob",
3839                                                                      hash_base=>$hash,
3840                                                                      hash=>$from_hash,
3841                                                                      file_name=>$from_path)},
3842                                                       "blob" . ($i+1)) .
3843                                               " | </td>\n";
3844                                 } else {
3845                                         if ($diff->{'to_id'} eq $from_hash) {
3846                                                 print "<td class=\"link nochange\">";
3847                                         } else {
3848                                                 print "<td class=\"link\">";
3849                                         }
3850                                         print $cgi->a({-href => href(action=>"blobdiff",
3851                                                                      hash=>$diff->{'to_id'},
3852                                                                      hash_parent=>$from_hash,
3853                                                                      hash_base=>$hash,
3854                                                                      hash_parent_base=>$hash_parent,
3855                                                                      file_name=>$diff->{'to_file'},
3856                                                                      file_parent=>$from_path)},
3857                                                       "diff" . ($i+1)) .
3858                                               " | </td>\n";
3859                                 }
3860                         }
3861
3862                         print "<td class=\"link\">";
3863                         if ($not_deleted) {
3864                                 print $cgi->a({-href => href(action=>"blob",
3865                                                              hash=>$diff->{'to_id'},
3866                                                              file_name=>$diff->{'to_file'},
3867                                                              hash_base=>$hash)},
3868                                               "blob");
3869                                 print " | " if ($has_history);
3870                         }
3871                         if ($has_history) {
3872                                 print $cgi->a({-href => href(action=>"history",
3873                                                              file_name=>$diff->{'to_file'},
3874                                                              hash_base=>$hash)},
3875                                               "history");
3876                         }
3877                         print "</td>\n";
3878
3879                         print "</tr>\n";
3880                         next; # instead of 'else' clause, to avoid extra indent
3881                 }
3882                 # else ordinary diff
3883
3884                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3885                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3886                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3887                         $to_mode_oct = oct $diff->{'to_mode'};
3888                         if (S_ISREG($to_mode_oct)) { # only for regular file
3889                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3890                         }
3891                         $to_file_type = file_type($diff->{'to_mode'});
3892                 }
3893                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3894                         $from_mode_oct = oct $diff->{'from_mode'};
3895                         if (S_ISREG($to_mode_oct)) { # only for regular file
3896                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3897                         }
3898                         $from_file_type = file_type($diff->{'from_mode'});
3899                 }
3900
3901                 if ($diff->{'status'} eq "A") { # created
3902                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3903                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3904                         $mode_chng   .= "]</span>";
3905                         print "<td>";
3906                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3907                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3908                                       -class => "list"}, esc_path($diff->{'file'}));
3909                         print "</td>\n";
3910                         print "<td>$mode_chng</td>\n";
3911                         print "<td class=\"link\">";
3912                         if ($action eq 'commitdiff') {
3913                                 # link to patch
3914                                 $patchno++;
3915                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3916                                 print " | ";
3917                         }
3918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3919                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3920                                       "blob");
3921                         print "</td>\n";
3922
3923                 } elsif ($diff->{'status'} eq "D") { # deleted
3924                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3925                         print "<td>";
3926                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3927                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3928                                        -class => "list"}, esc_path($diff->{'file'}));
3929                         print "</td>\n";
3930                         print "<td>$mode_chng</td>\n";
3931                         print "<td class=\"link\">";
3932                         if ($action eq 'commitdiff') {
3933                                 # link to patch
3934                                 $patchno++;
3935                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3936                                 print " | ";
3937                         }
3938                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3939                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3940                                       "blob") . " | ";
3941                         if ($have_blame) {
3942                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3943                                                              file_name=>$diff->{'file'})},
3944                                               "blame") . " | ";
3945                         }
3946                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3947                                                      file_name=>$diff->{'file'})},
3948                                       "history");
3949                         print "</td>\n";
3950
3951                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3952                         my $mode_chnge = "";
3953                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3954                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3955                                 if ($from_file_type ne $to_file_type) {
3956                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3957                                 }
3958                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3959                                         if ($from_mode_str && $to_mode_str) {
3960                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3961                                         } elsif ($to_mode_str) {
3962                                                 $mode_chnge .= " mode: $to_mode_str";
3963                                         }
3964                                 }
3965                                 $mode_chnge .= "]</span>\n";
3966                         }
3967                         print "<td>";
3968                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3969                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3970                                       -class => "list"}, esc_path($diff->{'file'}));
3971                         print "</td>\n";
3972                         print "<td>$mode_chnge</td>\n";
3973                         print "<td class=\"link\">";
3974                         if ($action eq 'commitdiff') {
3975                                 # link to patch
3976                                 $patchno++;
3977                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3978                                       " | ";
3979                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3980                                 # "commit" view and modified file (not onlu mode changed)
3981                                 print $cgi->a({-href => href(action=>"blobdiff",
3982                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3983                                                              hash_base=>$hash, hash_parent_base=>$parent,
3984                                                              file_name=>$diff->{'file'})},
3985                                               "diff") .
3986                                       " | ";
3987                         }
3988                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3989                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3990                                        "blob") . " | ";
3991                         if ($have_blame) {
3992                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3993                                                              file_name=>$diff->{'file'})},
3994                                               "blame") . " | ";
3995                         }
3996                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3997                                                      file_name=>$diff->{'file'})},
3998                                       "history");
3999                         print "</td>\n";
4000
4001                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4002                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4003                         my $nstatus = $status_name{$diff->{'status'}};
4004                         my $mode_chng = "";
4005                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4006                                 # mode also for directories, so we cannot use $to_mode_str
4007                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4008                         }
4009                         print "<td>" .
4010                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4011                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4012                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4013                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4014                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4015                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4016                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4017                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4018                               "<td class=\"link\">";
4019                         if ($action eq 'commitdiff') {
4020                                 # link to patch
4021                                 $patchno++;
4022                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4023                                       " | ";
4024                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4025                                 # "commit" view and modified file (not only pure rename or copy)
4026                                 print $cgi->a({-href => href(action=>"blobdiff",
4027                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4028                                                              hash_base=>$hash, hash_parent_base=>$parent,
4029                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4030                                               "diff") .
4031                                       " | ";
4032                         }
4033                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4034                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4035                                       "blob") . " | ";
4036                         if ($have_blame) {
4037                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4038                                                              file_name=>$diff->{'to_file'})},
4039                                               "blame") . " | ";
4040                         }
4041                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4042                                                     file_name=>$diff->{'to_file'})},
4043                                       "history");
4044                         print "</td>\n";
4045
4046                 } # we should not encounter Unmerged (U) or Unknown (X) status
4047                 print "</tr>\n";
4048         }
4049         print "</tbody>" if $has_header;
4050         print "</table>\n";
4051 }
4052
4053 sub git_patchset_body {
4054         my ($fd, $difftree, $hash, @hash_parents) = @_;
4055         my ($hash_parent) = $hash_parents[0];
4056
4057         my $is_combined = (@hash_parents > 1);
4058         my $patch_idx = 0;
4059         my $patch_number = 0;
4060         my $patch_line;
4061         my $diffinfo;
4062         my $to_name;
4063         my (%from, %to);
4064
4065         print "<div class=\"patchset\">\n";
4066
4067         # skip to first patch
4068         while ($patch_line = <$fd>) {
4069                 chomp $patch_line;
4070
4071                 last if ($patch_line =~ m/^diff /);
4072         }
4073
4074  PATCH:
4075         while ($patch_line) {
4076
4077                 # parse "git diff" header line
4078                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4079                         # $1 is from_name, which we do not use
4080                         $to_name = unquote($2);
4081                         $to_name =~ s!^b/!!;
4082                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4083                         # $1 is 'cc' or 'combined', which we do not use
4084                         $to_name = unquote($2);
4085                 } else {
4086                         $to_name = undef;
4087                 }
4088
4089                 # check if current patch belong to current raw line
4090                 # and parse raw git-diff line if needed
4091                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4092                         # this is continuation of a split patch
4093                         print "<div class=\"patch cont\">\n";
4094                 } else {
4095                         # advance raw git-diff output if needed
4096                         $patch_idx++ if defined $diffinfo;
4097
4098                         # read and prepare patch information
4099                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4100
4101                         # compact combined diff output can have some patches skipped
4102                         # find which patch (using pathname of result) we are at now;
4103                         if ($is_combined) {
4104                                 while ($to_name ne $diffinfo->{'to_file'}) {
4105                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4106                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4107                                               "</div>\n";  # class="patch"
4108
4109                                         $patch_idx++;
4110                                         $patch_number++;
4111
4112                                         last if $patch_idx > $#$difftree;
4113                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4114                                 }
4115                         }
4116
4117                         # modifies %from, %to hashes
4118                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4119
4120                         # this is first patch for raw difftree line with $patch_idx index
4121                         # we index @$difftree array from 0, but number patches from 1
4122                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4123                 }
4124
4125                 # git diff header
4126                 #assert($patch_line =~ m/^diff /) if DEBUG;
4127                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4128                 $patch_number++;
4129                 # print "git diff" header
4130                 print format_git_diff_header_line($patch_line, $diffinfo,
4131                                                   \%from, \%to);
4132
4133                 # print extended diff header
4134                 print "<div class=\"diff extended_header\">\n";
4135         EXTENDED_HEADER:
4136                 while ($patch_line = <$fd>) {
4137                         chomp $patch_line;
4138
4139                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4140
4141                         print format_extended_diff_header_line($patch_line, $diffinfo,
4142                                                                \%from, \%to);
4143                 }
4144                 print "</div>\n"; # class="diff extended_header"
4145
4146                 # from-file/to-file diff header
4147                 if (! $patch_line) {
4148                         print "</div>\n"; # class="patch"
4149                         last PATCH;
4150                 }
4151                 next PATCH if ($patch_line =~ m/^diff /);
4152                 #assert($patch_line =~ m/^---/) if DEBUG;
4153
4154                 my $last_patch_line = $patch_line;
4155                 $patch_line = <$fd>;
4156                 chomp $patch_line;
4157                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4158
4159                 print format_diff_from_to_header($last_patch_line, $patch_line,
4160                                                  $diffinfo, \%from, \%to,
4161                                                  @hash_parents);
4162
4163                 # the patch itself
4164         LINE:
4165                 while ($patch_line = <$fd>) {
4166                         chomp $patch_line;
4167
4168                         next PATCH if ($patch_line =~ m/^diff /);
4169
4170                         print format_diff_line($patch_line, \%from, \%to);
4171                 }
4172
4173         } continue {
4174                 print "</div>\n"; # class="patch"
4175         }
4176
4177         # for compact combined (--cc) format, with chunk and patch simpliciaction
4178         # patchset might be empty, but there might be unprocessed raw lines
4179         for (++$patch_idx if $patch_number > 0;
4180              $patch_idx < @$difftree;
4181              ++$patch_idx) {
4182                 # read and prepare patch information
4183                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4184
4185                 # generate anchor for "patch" links in difftree / whatchanged part
4186                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4187                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4188                       "</div>\n";  # class="patch"
4189
4190                 $patch_number++;
4191         }
4192
4193         if ($patch_number == 0) {
4194                 if (@hash_parents > 1) {
4195                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4196                 } else {
4197                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4198                 }
4199         }
4200
4201         print "</div>\n"; # class="patchset"
4202 }
4203
4204 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4205
4206 # fills project list info (age, description, owner, forks) for each
4207 # project in the list, removing invalid projects from returned list
4208 # NOTE: modifies $projlist, but does not remove entries from it
4209 sub fill_project_list_info {
4210         my ($projlist, $check_forks) = @_;
4211         my @projects;
4212
4213         my $show_ctags = gitweb_check_feature('ctags');
4214  PROJECT:
4215         foreach my $pr (@$projlist) {
4216                 my (@activity) = git_get_last_activity($pr->{'path'});
4217                 unless (@activity) {
4218                         next PROJECT;
4219                 }
4220                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4221                 if (!defined $pr->{'descr'}) {
4222                         my $descr = git_get_project_description($pr->{'path'}) || "";
4223                         $descr = to_utf8($descr);
4224                         $pr->{'descr_long'} = $descr;
4225                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4226                 }
4227                 if (!defined $pr->{'owner'}) {
4228                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4229                 }
4230                 if ($check_forks) {
4231                         my $pname = $pr->{'path'};
4232                         if (($pname =~ s/\.git$//) &&
4233                             ($pname !~ /\/$/) &&
4234                             (-d "$projectroot/$pname")) {
4235                                 $pr->{'forks'} = "-d $projectroot/$pname";
4236                         } else {
4237                                 $pr->{'forks'} = 0;
4238                         }
4239                 }
4240                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4241                 push @projects, $pr;
4242         }
4243
4244         return @projects;
4245 }
4246
4247 # print 'sort by' <th> element, generating 'sort by $name' replay link
4248 # if that order is not selected
4249 sub print_sort_th {
4250         my ($name, $order, $header) = @_;
4251         $header ||= ucfirst($name);
4252
4253         if ($order eq $name) {
4254                 print "<th>$header</th>\n";
4255         } else {
4256                 print "<th>" .
4257                       $cgi->a({-href => href(-replay=>1, order=>$name),
4258                                -class => "header"}, $header) .
4259                       "</th>\n";
4260         }
4261 }
4262
4263 sub git_project_list_ctags {
4264         my ($projects) = @_;
4265
4266         my $show_ctags = gitweb_check_feature('ctags');
4267         if ($show_ctags) {
4268                 my %ctags;
4269                 foreach my $p (@$projects) {
4270                         foreach my $ct (keys %{$p->{'ctags'}}) {
4271                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4272                         }
4273                 }
4274                 my $cloud = git_populate_project_tagcloud(\%ctags);
4275                 print git_show_project_tagcloud($cloud, 64);
4276         }
4277 }
4278
4279 sub git_project_list_body {
4280         # actually uses global variable $project
4281         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4282
4283         my $check_forks = gitweb_check_feature('forks');
4284         my @projects = fill_project_list_info($projlist, $check_forks);
4285
4286         $order ||= $default_projects_order;
4287         $from = 0 unless defined $from;
4288         $to = $#projects if (!defined $to || $#projects < $to);
4289
4290         my %order_info = (
4291                 project => { key => 'path', type => 'str' },
4292                 descr => { key => 'descr_long', type => 'str' },
4293                 owner => { key => 'owner', type => 'str' },
4294                 age => { key => 'age', type => 'num' }
4295         );
4296         my $oi = $order_info{$order};
4297         if ($oi->{'type'} eq 'str') {
4298                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4299         } else {
4300                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4301         }
4302
4303         git_project_list_ctags(\@projects);
4304
4305         print "<table class=\"project_list\">\n";
4306         unless ($no_header) {
4307                 print "<tr>\n";
4308                 if ($check_forks) {
4309                         print "<th></th>\n";
4310                 }
4311                 print_sort_th('project', $order, 'Project');
4312                 print_sort_th('descr', $order, 'Description');
4313                 print_sort_th('owner', $order, 'Owner');
4314                 print_sort_th('age', $order, 'Last Change');
4315                 print "<th></th>\n" . # for links
4316                       "</tr>\n";
4317         }
4318         my $alternate = 1;
4319         my $tagfilter = $cgi->param('by_tag');
4320         for (my $i = $from; $i <= $to; $i++) {
4321                 my $pr = $projects[$i];
4322
4323                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4324                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4325                         and not $pr->{'descr_long'} =~ /$searchtext/;
4326                 # Weed out forks or non-matching entries of search
4327                 if ($check_forks) {
4328                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4329                         $forkbase="^$forkbase" if $forkbase;
4330                         next if not $searchtext and not $tagfilter and $show_ctags
4331                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4332                 }
4333
4334                 if ($alternate) {
4335                         print "<tr class=\"dark\">\n";
4336                 } else {
4337                         print "<tr class=\"light\">\n";
4338                 }
4339                 $alternate ^= 1;
4340                 if ($check_forks) {
4341                         print "<td>";
4342                         if ($pr->{'forks'}) {
4343                                 print "<!-- $pr->{'forks'} -->\n";
4344                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4345                         }
4346                         print "</td>\n";
4347                 }
4348                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4349                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4350                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4351                                         -class => "list", -title => $pr->{'descr_long'}},
4352                                         esc_html($pr->{'descr'})) . "</td>\n" .
4353                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4354                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4355                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4356                       "<td class=\"link\">" .
4357                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4358                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4359                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4360                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4361                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4362                       "</td>\n" .
4363                       "</tr>\n";
4364         }
4365         if (defined $extra) {
4366                 print "<tr>\n";
4367                 if ($check_forks) {
4368                         print "<td></td>\n";
4369                 }
4370                 print "<td colspan=\"5\">$extra</td>\n" .
4371                       "</tr>\n";
4372         }
4373         print "</table>\n";
4374 }
4375
4376 sub git_project_search_form {
4377         print $cgi->startform(-method => "get") .
4378               "<p class=\"projsearch\">Search:\n" .
4379               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4380               "</p>" .
4381               $cgi->end_form() . "\n";
4382 }
4383
4384 sub git_project_list_all {
4385         my $order = $input_params{'order'};
4386         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4387                 die_error(400, "Unknown order parameter");
4388         }
4389
4390         my @list = git_get_projects_list();
4391         if (!@list) {
4392                 die_error(404, "No projects found");
4393         }
4394
4395         git_project_list_body(\@list, $order, undef, undef, undef, undef, $projlist_cache_lifetime);
4396 }
4397
4398 sub git_shortlog_body {
4399         # uses global variable $project
4400         my ($commitlist, $from, $to, $refs, $extra) = @_;
4401
4402         $from = 0 unless defined $from;
4403         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4404
4405         print "<table class=\"shortlog\">\n";
4406         my $alternate = 1;
4407         for (my $i = $from; $i <= $to; $i++) {
4408                 my %co = %{$commitlist->[$i]};
4409                 my $commit = $co{'id'};
4410                 my $ref = format_ref_marker($refs, $commit);
4411                 if ($alternate) {
4412                         print "<tr class=\"dark\">\n";
4413                 } else {
4414                         print "<tr class=\"light\">\n";
4415                 }
4416                 $alternate ^= 1;
4417                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4418                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4419                       format_author_html('td', \%co, 10) . "<td>";
4420                 print format_subject_html($co{'title'}, $co{'title_short'},
4421                                           href(action=>"commit", hash=>$commit), $ref);
4422                 print "</td>\n" .
4423                       "<td class=\"link\">" .
4424                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4425                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4426                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4427                 my $snapshot_links = format_snapshot_links($commit);
4428                 if (defined $snapshot_links) {
4429                         print " | " . $snapshot_links;
4430                 }
4431                 print "</td>\n" .
4432                       "</tr>\n";
4433         }
4434         if (defined $extra) {
4435                 print "<tr>\n" .
4436                       "<td colspan=\"4\">$extra</td>\n" .
4437                       "</tr>\n";
4438         }
4439         print "</table>\n";
4440 }
4441
4442 sub git_history_body {
4443         # Warning: assumes constant type (blob or tree) during history
4444         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4445
4446         $from = 0 unless defined $from;
4447         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4448
4449         print "<table class=\"history\">\n";
4450         my $alternate = 1;
4451         for (my $i = $from; $i <= $to; $i++) {
4452                 my %co = %{$commitlist->[$i]};
4453                 if (!%co) {
4454                         next;
4455                 }
4456                 my $commit = $co{'id'};
4457
4458                 my $ref = format_ref_marker($refs, $commit);
4459
4460                 if ($alternate) {
4461                         print "<tr class=\"dark\">\n";
4462                 } else {
4463                         print "<tr class=\"light\">\n";
4464                 }
4465                 $alternate ^= 1;
4466                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4467         # shortlog:   format_author_html('td', \%co, 10)
4468                       format_author_html('td', \%co, 15, 3) . "<td>";
4469                 # originally git_history used chop_str($co{'title'}, 50)
4470                 print format_subject_html($co{'title'}, $co{'title_short'},
4471                                           href(action=>"commit", hash=>$commit), $ref);
4472                 print "</td>\n" .
4473                       "<td class=\"link\">" .
4474                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4475                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4476
4477                 if ($ftype eq 'blob') {
4478                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4479                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4480                         if (defined $blob_current && defined $blob_parent &&
4481                                         $blob_current ne $blob_parent) {
4482                                 print " | " .
4483                                         $cgi->a({-href => href(action=>"blobdiff",
4484                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4485                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4486                                                                file_name=>$file_name)},
4487                                                 "diff to current");
4488                         }
4489                 }
4490                 print "</td>\n" .
4491                       "</tr>\n";
4492         }
4493         if (defined $extra) {
4494                 print "<tr>\n" .
4495                       "<td colspan=\"4\">$extra</td>\n" .
4496                       "</tr>\n";
4497         }
4498         print "</table>\n";
4499 }
4500
4501 sub git_tags_body {
4502         # uses global variable $project
4503         my ($taglist, $from, $to, $extra) = @_;
4504         $from = 0 unless defined $from;
4505         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4506
4507         print "<table class=\"tags\">\n";
4508         my $alternate = 1;
4509         for (my $i = $from; $i <= $to; $i++) {
4510                 my $entry = $taglist->[$i];
4511                 my %tag = %$entry;
4512                 my $comment = $tag{'subject'};
4513                 my $comment_short;
4514                 if (defined $comment) {
4515                         $comment_short = chop_str($comment, 30, 5);
4516                 }
4517                 if ($alternate) {
4518                         print "<tr class=\"dark\">\n";
4519                 } else {
4520                         print "<tr class=\"light\">\n";
4521                 }
4522                 $alternate ^= 1;
4523                 if (defined $tag{'age'}) {
4524                         print "<td><i>$tag{'age'}</i></td>\n";
4525                 } else {
4526                         print "<td></td>\n";
4527                 }
4528                 print "<td>" .
4529                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4530                                -class => "list name"}, esc_html($tag{'name'})) .
4531                       "</td>\n" .
4532                       "<td>";
4533                 if (defined $comment) {
4534                         print format_subject_html($comment, $comment_short,
4535                                                   href(action=>"tag", hash=>$tag{'id'}));
4536                 }
4537                 print "</td>\n" .
4538                       "<td class=\"selflink\">";
4539                 if ($tag{'type'} eq "tag") {
4540                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4541                 } else {
4542                         print "&nbsp;";
4543                 }
4544                 print "</td>\n" .
4545                       "<td class=\"link\">" . " | " .
4546                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4547                 if ($tag{'reftype'} eq "commit") {
4548                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4549                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4550                 } elsif ($tag{'reftype'} eq "blob") {
4551                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4552                 }
4553                 print "</td>\n" .
4554                       "</tr>";
4555         }
4556         if (defined $extra) {
4557                 print "<tr>\n" .
4558                       "<td colspan=\"5\">$extra</td>\n" .
4559                       "</tr>\n";
4560         }
4561         print "</table>\n";
4562 }
4563
4564 sub git_heads_body {
4565         # uses global variable $project
4566         my ($headlist, $head, $from, $to, $extra) = @_;
4567         $from = 0 unless defined $from;
4568         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4569
4570         print "<table class=\"heads\">\n";
4571         my $alternate = 1;
4572         for (my $i = $from; $i <= $to; $i++) {
4573                 my $entry = $headlist->[$i];
4574                 my %ref = %$entry;
4575                 my $curr = $ref{'id'} eq $head;
4576                 if ($alternate) {
4577                         print "<tr class=\"dark\">\n";
4578                 } else {
4579                         print "<tr class=\"light\">\n";
4580                 }
4581                 $alternate ^= 1;
4582                 print "<td><i>$ref{'age'}</i></td>\n" .
4583                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4584                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4585                                -class => "list name"},esc_html($ref{'name'})) .
4586                       "</td>\n" .
4587                       "<td class=\"link\">" .
4588                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4589                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4590                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4591                       "</td>\n" .
4592                       "</tr>";
4593         }
4594         if (defined $extra) {
4595                 print "<tr>\n" .
4596                       "<td colspan=\"3\">$extra</td>\n" .
4597                       "</tr>\n";
4598         }
4599         print "</table>\n";
4600 }
4601
4602 sub git_search_grep_body {
4603         my ($commitlist, $from, $to, $extra) = @_;
4604         $from = 0 unless defined $from;
4605         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4606
4607         print "<table class=\"commit_search\">\n";
4608         my $alternate = 1;
4609         for (my $i = $from; $i <= $to; $i++) {
4610                 my %co = %{$commitlist->[$i]};
4611                 if (!%co) {
4612                         next;
4613                 }
4614                 my $commit = $co{'id'};
4615                 if ($alternate) {
4616                         print "<tr class=\"dark\">\n";
4617                 } else {
4618                         print "<tr class=\"light\">\n";
4619                 }
4620                 $alternate ^= 1;
4621                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4622                       format_author_html('td', \%co, 15, 5) .
4623                       "<td>" .
4624                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4625                                -class => "list subject"},
4626                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4627                 my $comment = $co{'comment'};
4628                 foreach my $line (@$comment) {
4629                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4630                                 my ($lead, $match, $trail) = ($1, $2, $3);
4631                                 $match = chop_str($match, 70, 5, 'center');
4632                                 my $contextlen = int((80 - length($match))/2);
4633                                 $contextlen = 30 if ($contextlen > 30);
4634                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4635                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4636
4637                                 $lead  = esc_html($lead);
4638                                 $match = esc_html($match);
4639                                 $trail = esc_html($trail);
4640
4641                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4642                         }
4643                 }
4644                 print "</td>\n" .
4645                       "<td class=\"link\">" .
4646                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4647                       " | " .
4648                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4649                       " | " .
4650                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4651                 print "</td>\n" .
4652                       "</tr>\n";
4653         }
4654         if (defined $extra) {
4655                 print "<tr>\n" .
4656                       "<td colspan=\"3\">$extra</td>\n" .
4657                       "</tr>\n";
4658         }
4659         print "</table>\n";
4660 }
4661
4662 ## ======================================================================
4663 ## ======================================================================
4664 ## actions
4665
4666 sub git_frontpage {
4667         git_header_html();
4668         if (-f $home_text) {
4669                 print "<div class=\"index_include\">\n";
4670                 insert_file($home_text);
4671                 print "</div>\n";
4672         }
4673         git_project_search_form();
4674         if (not $frontpage_no_project_list) {
4675                 git_project_list_all();
4676         } else {
4677                 if ($frontpage_no_project_list == 1 and gitweb_check_feature('ctags'))
4678                         my @list = git_get_projects_list();
4679                         my @projects = fill_project_list_info(\@list, gitweb_check_feature('forks'));
4680                         git_project_list_ctags(\@projects);
4681                 }
4682                 print "<p class=\"projectlist_link\">" .
4683                         $cgi->a({-href => href(action=>'project_list')}, "Browse all projects") .
4684                         "</p>\n";
4685         }
4686         git_footer_html();
4687 }
4688
4689 sub git_project_list {
4690         git_header_html();
4691         git_project_search_form();
4692         git_project_list_all();
4693         git_footer_html();
4694 }
4695
4696 sub git_forks {
4697         my $order = $input_params{'order'};
4698         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4699                 die_error(400, "Unknown order parameter");
4700         }
4701
4702         my @list = git_get_projects_list($project);
4703         if (!@list) {
4704                 die_error(404, "No forks found");
4705         }
4706
4707         git_header_html();
4708         git_print_page_nav('','');
4709         git_print_header_div('summary', "$project forks");
4710         git_project_list_body(\@list, $order);
4711         git_footer_html();
4712 }
4713
4714 sub git_project_index {
4715         my @projects = git_get_projects_list($project);
4716
4717         print $cgi->header(
4718                 -type => 'text/plain',
4719                 -charset => 'utf-8',
4720                 -content_disposition => 'inline; filename="index.aux"');
4721
4722         foreach my $pr (@projects) {
4723                 if (!exists $pr->{'owner'}) {
4724                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4725                 }
4726
4727                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4728                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4729                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4730                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4731                 $path  =~ s/ /\+/g;
4732                 $owner =~ s/ /\+/g;
4733
4734                 print "$path $owner\n";
4735         }
4736 }
4737
4738 sub git_summary {
4739         my $descr = git_get_project_description($project) || "none";
4740         my %co = parse_commit("HEAD");
4741         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4742         my $head = $co{'id'};
4743
4744         my $owner = git_get_project_owner($project);
4745
4746         my $refs = git_get_references();
4747         # These get_*_list functions return one more to allow us to see if
4748         # there are more ...
4749         my @taglist  = git_get_tags_list(16);
4750         my @headlist = git_get_heads_list(16);
4751         my @forklist;
4752         my $check_forks = gitweb_check_feature('forks');
4753
4754         if ($check_forks) {
4755                 @forklist = git_get_projects_list($project);
4756         }
4757
4758         git_header_html();
4759         git_print_page_nav('summary','', $head);
4760
4761         print "<div class=\"title\">&nbsp;</div>\n";
4762         print "<table class=\"projects_list\">\n" .
4763               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4764               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4765         if (defined $cd{'rfc2822'}) {
4766                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4767         }
4768
4769         # use per project git URL list in $projectroot/$project/cloneurl
4770         # or make project git URL from git base URL and project name
4771         my $url_tag = "URL";
4772         my @url_list = git_get_project_url_list($project);
4773         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4774         foreach my $git_url (@url_list) {
4775                 next unless $git_url;
4776                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4777                 $url_tag = "";
4778         }
4779
4780         # Tag cloud
4781         my $show_ctags = gitweb_check_feature('ctags');
4782         if ($show_ctags) {
4783                 my $ctags = git_get_project_ctags($project);
4784                 my $cloud = git_populate_project_tagcloud($ctags);
4785                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4786                 print "</td>\n<td>" unless %$ctags;
4787                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4788                 print "</td>\n<td>" if %$ctags;
4789                 print git_show_project_tagcloud($cloud, 48);
4790                 print "</td></tr>";
4791         }
4792
4793         print "</table>\n";
4794
4795         # If XSS prevention is on, we don't include README.html.
4796         # TODO: Allow a readme in some safe format.
4797         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4798                 print "<div class=\"title\">readme</div>\n" .
4799                       "<div class=\"readme\">\n";
4800                 insert_file("$projectroot/$project/README.html");
4801                 print "\n</div>\n"; # class="readme"
4802         }
4803
4804         # we need to request one more than 16 (0..15) to check if
4805         # those 16 are all
4806         my @commitlist = $head ? parse_commits($head, 17) : ();
4807         if (@commitlist) {
4808                 git_print_header_div('shortlog');
4809                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4810                                   $#commitlist <=  15 ? undef :
4811                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4812         }
4813
4814         if (@taglist) {
4815                 git_print_header_div('tags');
4816                 git_tags_body(\@taglist, 0, 15,
4817                               $#taglist <=  15 ? undef :
4818                               $cgi->a({-href => href(action=>"tags")}, "..."));
4819         }
4820
4821         if (@headlist) {
4822                 git_print_header_div('heads');
4823                 git_heads_body(\@headlist, $head, 0, 15,
4824                                $#headlist <= 15 ? undef :
4825                                $cgi->a({-href => href(action=>"heads")}, "..."));
4826         }
4827
4828         if (@forklist) {
4829                 git_print_header_div('forks');
4830                 git_project_list_body(\@forklist, 'age', 0, 15,
4831                                       $#forklist <= 15 ? undef :
4832                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4833                                       'no_header');
4834         }
4835
4836         git_footer_html();
4837 }
4838
4839 sub git_tag {
4840         my $head = git_get_head_hash($project);
4841         git_header_html();
4842         git_print_page_nav('','', $head,undef,$head);
4843         my %tag = parse_tag($hash);
4844
4845         if (! %tag) {
4846                 die_error(404, "Unknown tag object");
4847         }
4848
4849         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4850         print "<div class=\"title_text\">\n" .
4851               "<table class=\"object_header\">\n" .
4852               "<tr>\n" .
4853               "<td>object</td>\n" .
4854               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4855                                $tag{'object'}) . "</td>\n" .
4856               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4857                                               $tag{'type'}) . "</td>\n" .
4858               "</tr>\n";
4859         if (defined($tag{'author'})) {
4860                 git_print_authorship_rows(\%tag, 'author');
4861         }
4862         print "</table>\n\n" .
4863               "</div>\n";
4864         print "<div class=\"page_body\">";
4865         my $comment = $tag{'comment'};
4866         foreach my $line (@$comment) {
4867                 chomp $line;
4868                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4869         }
4870         print "</div>\n";
4871         git_footer_html();
4872 }
4873
4874 sub git_blame {
4875         # permissions
4876         gitweb_check_feature('blame')
4877                 or die_error(403, "Blame view not allowed");
4878
4879         # error checking
4880         die_error(400, "No file name given") unless $file_name;
4881         $hash_base ||= git_get_head_hash($project);
4882         die_error(404, "Couldn't find base commit") unless $hash_base;
4883         my %co = parse_commit($hash_base)
4884                 or die_error(404, "Commit not found");
4885         my $ftype = "blob";
4886         if (!defined $hash) {
4887                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4888                         or die_error(404, "Error looking up file");
4889         } else {
4890                 $ftype = git_get_type($hash);
4891                 if ($ftype !~ "blob") {
4892                         die_error(400, "Object is not a blob");
4893                 }
4894         }
4895
4896         # run git-blame --porcelain
4897         open my $fd, "-|", git_cmd(), "blame", '-p',
4898                 $hash_base, '--', $file_name
4899                 or die_error(500, "Open git-blame failed");
4900
4901         # page header
4902         git_header_html();
4903         my $formats_nav =
4904                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4905                         "blob") .
4906                 " | " .
4907                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4908                         "history") .
4909                 " | " .
4910                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4911                         "HEAD");
4912         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4913         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4914         git_print_page_path($file_name, $ftype, $hash_base);
4915
4916         # page body
4917         my @rev_color = qw(light dark);
4918         my $num_colors = scalar(@rev_color);
4919         my $current_color = 0;
4920         my %metainfo = ();
4921
4922         print <<HTML;
4923 <div class="page_body">
4924 <table class="blame">
4925 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4926 HTML
4927  LINE:
4928         while (my $line = <$fd>) {
4929                 chomp $line;
4930                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4931                 # no <lines in group> for subsequent lines in group of lines
4932                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4933                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4934                 if (!exists $metainfo{$full_rev}) {
4935                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4936                 }
4937                 my $meta = $metainfo{$full_rev};
4938                 my $data;
4939                 while ($data = <$fd>) {
4940                         chomp $data;
4941                         last if ($data =~ s/^\t//); # contents of line
4942                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4943                                 $meta->{$1} = $2 unless exists $meta->{$1};
4944                         }
4945                         if ($data =~ /^previous /) {
4946                                 $meta->{'nprevious'}++;
4947                         }
4948                 }
4949                 my $short_rev = substr($full_rev, 0, 8);
4950                 my $author = $meta->{'author'};
4951                 my %date =
4952                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4953                 my $date = $date{'iso-tz'};
4954                 if ($group_size) {
4955                         $current_color = ($current_color + 1) % $num_colors;
4956                 }
4957                 my $tr_class = $rev_color[$current_color];
4958                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4959                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4960                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4961                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4962                 if ($group_size) {
4963                         print "<td class=\"sha1\"";
4964                         print " title=\"". esc_html($author) . ", $date\"";
4965                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4966                         print ">";
4967                         print $cgi->a({-href => href(action=>"commit",
4968                                                      hash=>$full_rev,
4969                                                      file_name=>$file_name)},
4970                                       esc_html($short_rev));
4971                         if ($group_size >= 2) {
4972                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4973                                 if (@author_initials) {
4974                                         print "<br />" .
4975                                               esc_html(join('', @author_initials));
4976                                         #           or join('.', ...)
4977                                 }
4978                         }
4979                         print "</td>\n";
4980                 }
4981                 # 'previous' <sha1 of parent commit> <filename at commit>
4982                 if (exists $meta->{'previous'} &&
4983                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4984                         $meta->{'parent'} = $1;
4985                         $meta->{'file_parent'} = unquote($2);
4986                 }
4987                 my $linenr_commit =
4988                         exists($meta->{'parent'}) ?
4989                         $meta->{'parent'} : $full_rev;
4990                 my $linenr_filename =
4991                         exists($meta->{'file_parent'}) ?
4992                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4993                 my $blamed = href(action => 'blame',
4994                                   file_name => $linenr_filename,
4995                                   hash_base => $linenr_commit);
4996                 print "<td class=\"linenr\">";
4997                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4998                                 -class => "linenr" },
4999                               esc_html($lineno));
5000                 print "</td>";
5001                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5002                 print "</tr>\n";
5003         }
5004         print "</table>\n";
5005         print "</div>";
5006         close $fd
5007                 or print "Reading blob failed\n";
5008
5009         # page footer
5010         git_footer_html();
5011 }
5012
5013 sub git_tags {
5014         my $head = git_get_head_hash($project);
5015         git_header_html();
5016         git_print_page_nav('','', $head,undef,$head);
5017         git_print_header_div('summary', $project);
5018
5019         my @tagslist = git_get_tags_list();
5020         if (@tagslist) {
5021                 git_tags_body(\@tagslist);
5022         }
5023         git_footer_html();
5024 }
5025
5026 sub git_heads {
5027         my $head = git_get_head_hash($project);
5028         git_header_html();
5029         git_print_page_nav('','', $head,undef,$head);
5030         git_print_header_div('summary', $project);
5031
5032         my @headslist = git_get_heads_list();
5033         if (@headslist) {
5034                 git_heads_body(\@headslist, $head);
5035         }
5036         git_footer_html();
5037 }
5038
5039 sub git_blob_plain {
5040         my $type = shift;
5041         my $expires;
5042
5043         if (!defined $hash) {
5044                 if (defined $file_name) {
5045                         my $base = $hash_base || git_get_head_hash($project);
5046                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5047                                 or die_error(404, "Cannot find file");
5048                 } else {
5049                         die_error(400, "No file name defined");
5050                 }
5051         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5052                 # blobs defined by non-textual hash id's can be cached
5053                 $expires = "+1d";
5054         }
5055
5056         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5057                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5058
5059         # content-type (can include charset)
5060         $type = blob_contenttype($fd, $file_name, $type);
5061
5062         # "save as" filename, even when no $file_name is given
5063         my $save_as = "$hash";
5064         if (defined $file_name) {
5065                 $save_as = $file_name;
5066         } elsif ($type =~ m/^text\//) {
5067                 $save_as .= '.txt';
5068         }
5069
5070         # With XSS prevention on, blobs of all types except a few known safe
5071         # ones are served with "Content-Disposition: attachment" to make sure
5072         # they don't run in our security domain.  For certain image types,
5073         # blob view writes an <img> tag referring to blob_plain view, and we
5074         # want to be sure not to break that by serving the image as an
5075         # attachment (though Firefox 3 doesn't seem to care).
5076         my $sandbox = $prevent_xss &&
5077                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5078
5079         print $cgi->header(
5080                 -type => $type,
5081                 -expires => $expires,
5082                 -content_disposition =>
5083                         ($sandbox ? 'attachment' : 'inline')
5084                         . '; filename="' . $save_as . '"');
5085         local $/ = undef;
5086         binmode STDOUT, ':raw';
5087         print <$fd>;
5088         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5089         close $fd;
5090 }
5091
5092 sub git_blob {
5093         my $expires;
5094
5095         if (!defined $hash) {
5096                 if (defined $file_name) {
5097                         my $base = $hash_base || git_get_head_hash($project);
5098                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5099                                 or die_error(404, "Cannot find file");
5100                 } else {
5101                         die_error(400, "No file name defined");
5102                 }
5103         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5104                 # blobs defined by non-textual hash id's can be cached
5105                 $expires = "+1d";
5106         }
5107
5108         my $have_blame = gitweb_check_feature('blame');
5109         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5110                 or die_error(500, "Couldn't cat $file_name, $hash");
5111         my $mimetype = blob_mimetype($fd, $file_name);
5112         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5113                 close $fd;
5114                 return git_blob_plain($mimetype);
5115         }
5116         # we can have blame only for text/* mimetype
5117         $have_blame &&= ($mimetype =~ m!^text/!);
5118
5119         git_header_html(undef, $expires);
5120         my $formats_nav = '';
5121         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5122                 if (defined $file_name) {
5123                         if ($have_blame) {
5124                                 $formats_nav .=
5125                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5126                                                 "blame") .
5127                                         " | ";
5128                         }
5129                         $formats_nav .=
5130                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5131                                         "history") .
5132                                 " | " .
5133                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5134                                         "raw") .
5135                                 " | " .
5136                                 $cgi->a({-href => href(action=>"blob",
5137                                                        hash_base=>"HEAD", file_name=>$file_name)},
5138                                         "HEAD");
5139                 } else {
5140                         $formats_nav .=
5141                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5142                                         "raw");
5143                 }
5144                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5145                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5146         } else {
5147                 print "<div class=\"page_nav\">\n" .
5148                       "<br/><br/></div>\n" .
5149                       "<div class=\"title\">$hash</div>\n";
5150         }
5151         git_print_page_path($file_name, "blob", $hash_base);
5152         print "<div class=\"page_body\">\n";
5153         if ($mimetype =~ m!^image/!) {
5154                 print qq!<img type="$mimetype"!;
5155                 if ($file_name) {
5156                         print qq! alt="$file_name" title="$file_name"!;
5157                 }
5158                 print qq! src="! .
5159                       href(action=>"blob_plain", hash=>$hash,
5160                            hash_base=>$hash_base, file_name=>$file_name) .
5161                       qq!" />\n!;
5162         } else {
5163                 my $nr;
5164                 while (my $line = <$fd>) {
5165                         chomp $line;
5166                         $nr++;
5167                         $line = untabify($line);
5168                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5169                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5170                 }
5171         }
5172         close $fd
5173                 or print "Reading blob failed.\n";
5174         print "</div>";
5175         git_footer_html();
5176 }
5177
5178 sub git_tree {
5179         if (!defined $hash_base) {
5180                 $hash_base = "HEAD";
5181         }
5182         if (!defined $hash) {
5183                 if (defined $file_name) {
5184                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5185                 } else {
5186                         $hash = $hash_base;
5187                 }
5188         }
5189         die_error(404, "No such tree") unless defined($hash);
5190
5191         my $show_sizes = gitweb_check_feature('show-sizes');
5192         my $have_blame = gitweb_check_feature('blame');
5193
5194         my @entries = ();
5195         {
5196                 local $/ = "\0";
5197                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5198                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5199                         or die_error(500, "Open git-ls-tree failed");
5200                 @entries = map { chomp; $_ } <$fd>;
5201                 close $fd
5202                         or die_error(404, "Reading tree failed");
5203         }
5204
5205         my $refs = git_get_references();
5206         my $ref = format_ref_marker($refs, $hash_base);
5207         git_header_html();
5208         my $basedir = '';
5209         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5210                 my @views_nav = ();
5211                 if (defined $file_name) {
5212                         push @views_nav,
5213                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5214                                         "history"),
5215                                 $cgi->a({-href => href(action=>"tree",
5216                                                        hash_base=>"HEAD", file_name=>$file_name)},
5217                                         "HEAD"),
5218                 }
5219                 my $snapshot_links = format_snapshot_links($hash);
5220                 if (defined $snapshot_links) {
5221                         # FIXME: Should be available when we have no hash base as well.
5222                         push @views_nav, $snapshot_links;
5223                 }
5224                 git_print_page_nav('tree','', $hash_base, undef, undef,
5225                                    join(' | ', @views_nav));
5226                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5227         } else {
5228                 undef $hash_base;
5229                 print "<div class=\"page_nav\">\n";
5230                 print "<br/><br/></div>\n";
5231                 print "<div class=\"title\">$hash</div>\n";
5232         }
5233         if (defined $file_name) {
5234                 $basedir = $file_name;
5235                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5236                         $basedir .= '/';
5237                 }
5238                 git_print_page_path($file_name, 'tree', $hash_base);
5239         }
5240         print "<div class=\"page_body\">\n";
5241         print "<table class=\"tree\">\n";
5242         my $alternate = 1;
5243         # '..' (top directory) link if possible
5244         if (defined $hash_base &&
5245             defined $file_name && $file_name =~ m![^/]+$!) {
5246                 if ($alternate) {
5247                         print "<tr class=\"dark\">\n";
5248                 } else {
5249                         print "<tr class=\"light\">\n";
5250                 }
5251                 $alternate ^= 1;
5252
5253                 my $up = $file_name;
5254                 $up =~ s!/?[^/]+$!!;
5255                 undef $up unless $up;
5256                 # based on git_print_tree_entry
5257                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5258                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5259                 print '<td class="list">';
5260                 print $cgi->a({-href => href(action=>"tree",
5261                                              hash_base=>$hash_base,
5262                                              file_name=>$up)},
5263                               "..");
5264                 print "</td>\n";
5265                 print "<td class=\"link\"></td>\n";
5266
5267                 print "</tr>\n";
5268         }
5269         foreach my $line (@entries) {
5270                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5271
5272                 if ($alternate) {
5273                         print "<tr class=\"dark\">\n";
5274                 } else {
5275                         print "<tr class=\"light\">\n";
5276                 }
5277                 $alternate ^= 1;
5278
5279                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5280
5281                 print "</tr>\n";
5282         }
5283         print "</table>\n" .
5284               "</div>";
5285         git_footer_html();
5286 }
5287
5288 sub git_snapshot {
5289         my $format = $input_params{'snapshot_format'};
5290         if (!@snapshot_fmts) {
5291                 die_error(403, "Snapshots not allowed");
5292         }
5293         # default to first supported snapshot format
5294         $format ||= $snapshot_fmts[0];
5295         if ($format !~ m/^[a-z0-9]+$/) {
5296                 die_error(400, "Invalid snapshot format parameter");
5297         } elsif (!exists($known_snapshot_formats{$format})) {
5298                 die_error(400, "Unknown snapshot format");
5299         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5300                 die_error(403, "Snapshot format not allowed");
5301         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5302                 die_error(403, "Unsupported snapshot format");
5303         }
5304
5305         if (!defined $hash) {
5306                 $hash = git_get_head_hash($project);
5307         }
5308
5309         my $name = $project;
5310         $name =~ s,([^/])/*\.git$,$1,;
5311         $name = basename($name);
5312         my $filename = to_utf8($name);
5313         $name =~ s/\047/\047\\\047\047/g;
5314         my $cmd;
5315         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5316         $cmd = quote_command(
5317                 git_cmd(), 'archive',
5318                 "--format=$known_snapshot_formats{$format}{'format'}",
5319                 "--prefix=$name/", $hash);
5320         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5321                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5322         }
5323
5324         print $cgi->header(
5325                 -type => $known_snapshot_formats{$format}{'type'},
5326                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5327                 -status => '200 OK');
5328
5329         open my $fd, "-|", $cmd
5330                 or die_error(500, "Execute git-archive failed");
5331         binmode STDOUT, ':raw';
5332         print <$fd>;
5333         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5334         close $fd;
5335 }
5336
5337 sub git_log {
5338         my $head = git_get_head_hash($project);
5339         if (!defined $hash) {
5340                 $hash = $head;
5341         }
5342         if (!defined $page) {
5343                 $page = 0;
5344         }
5345         my $refs = git_get_references();
5346
5347         my @commitlist = parse_commits($hash, 101, (100 * $page));
5348
5349         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5350
5351         my ($patch_max) = gitweb_get_feature('patches');
5352         if ($patch_max) {
5353                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5354                         $paging_nav .= " &sdot; " .
5355                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5356                                         "patches");
5357                 }
5358         }
5359
5360         git_header_html();
5361         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5362
5363         if (!@commitlist) {
5364                 my %co = parse_commit($hash);
5365
5366                 git_print_header_div('summary', $project);
5367                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5368         }
5369         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5370         for (my $i = 0; $i <= $to; $i++) {
5371                 my %co = %{$commitlist[$i]};
5372                 next if !%co;
5373                 my $commit = $co{'id'};
5374                 my $ref = format_ref_marker($refs, $commit);
5375                 my %ad = parse_date($co{'author_epoch'});
5376                 git_print_header_div('commit',
5377                                "<span class=\"age\">$co{'age_string'}</span>" .
5378                                esc_html($co{'title'}) . $ref,
5379                                $commit);
5380                 print "<div class=\"title_text\">\n" .
5381                       "<div class=\"log_link\">\n" .
5382                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5383                       " | " .
5384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5385                       " | " .
5386                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5387                       "<br/>\n" .
5388                       "</div>\n";
5389                       git_print_authorship(\%co, -tag => 'span');
5390                       print "<br/>\n</div>\n";
5391
5392                 print "<div class=\"log_body\">\n";
5393                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5394                 print "</div>\n";
5395         }
5396         if ($#commitlist >= 100) {
5397                 print "<div class=\"page_nav\">\n";
5398                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5399                                -accesskey => "n", -title => "Alt-n"}, "next");
5400                 print "</div>\n";
5401         }
5402         git_footer_html();
5403 }
5404
5405 sub git_commit {
5406         $hash ||= $hash_base || "HEAD";
5407         my %co = parse_commit($hash)
5408             or die_error(404, "Unknown commit object");
5409
5410         my $parent  = $co{'parent'};
5411         my $parents = $co{'parents'}; # listref
5412
5413         # we need to prepare $formats_nav before any parameter munging
5414         my $formats_nav;
5415         if (!defined $parent) {
5416                 # --root commitdiff
5417                 $formats_nav .= '(initial)';
5418         } elsif (@$parents == 1) {
5419                 # single parent commit
5420                 $formats_nav .=
5421                         '(parent: ' .
5422                         $cgi->a({-href => href(action=>"commit",
5423                                                hash=>$parent)},
5424                                 esc_html(substr($parent, 0, 7))) .
5425                         ')';
5426         } else {
5427                 # merge commit
5428                 $formats_nav .=
5429                         '(merge: ' .
5430                         join(' ', map {
5431                                 $cgi->a({-href => href(action=>"commit",
5432                                                        hash=>$_)},
5433                                         esc_html(substr($_, 0, 7)));
5434                         } @$parents ) .
5435                         ')';
5436         }
5437         if (gitweb_check_feature('patches') && @$parents <= 1) {
5438                 $formats_nav .= " | " .
5439                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5440                                 "patch");
5441         }
5442
5443         if (!defined $parent) {
5444                 $parent = "--root";
5445         }
5446         my @difftree;
5447         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5448                 @diff_opts,
5449                 (@$parents <= 1 ? $parent : '-c'),
5450                 $hash, "--"
5451                 or die_error(500, "Open git-diff-tree failed");
5452         @difftree = map { chomp; $_ } <$fd>;
5453         close $fd or die_error(404, "Reading git-diff-tree failed");
5454
5455         # non-textual hash id's can be cached
5456         my $expires;
5457         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5458                 $expires = "+1d";
5459         }
5460         my $refs = git_get_references();
5461         my $ref = format_ref_marker($refs, $co{'id'});
5462
5463         git_header_html(undef, $expires);
5464         git_print_page_nav('commit', '',
5465                            $hash, $co{'tree'}, $hash,
5466                            $formats_nav);
5467
5468         if (defined $co{'parent'}) {
5469                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5470         } else {
5471                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5472         }
5473         print "<div class=\"title_text\">\n" .
5474               "<table class=\"object_header\">\n";
5475         git_print_authorship_rows(\%co);
5476         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5477         print "<tr>" .
5478               "<td>tree</td>" .
5479               "<td class=\"sha1\">" .
5480               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5481                        class => "list"}, $co{'tree'}) .
5482               "</td>" .
5483               "<td class=\"link\">" .
5484               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5485                       "tree");
5486         my $snapshot_links = format_snapshot_links($hash);
5487         if (defined $snapshot_links) {
5488                 print " | " . $snapshot_links;
5489         }
5490         print "</td>" .
5491               "</tr>\n";
5492
5493         foreach my $par (@$parents) {
5494                 print "<tr>" .
5495                       "<td>parent</td>" .
5496                       "<td class=\"sha1\">" .
5497                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5498                                class => "list"}, $par) .
5499                       "</td>" .
5500                       "<td class=\"link\">" .
5501                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5502                       " | " .
5503                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5504                       "</td>" .
5505                       "</tr>\n";
5506         }
5507         print "</table>".
5508               "</div>\n";
5509
5510         print "<div class=\"page_body\">\n";
5511         git_print_log($co{'comment'});
5512         print "</div>\n";
5513
5514         git_difftree_body(\@difftree, $hash, @$parents);
5515
5516         git_footer_html();
5517 }
5518
5519 sub git_object {
5520         # object is defined by:
5521         # - hash or hash_base alone
5522         # - hash_base and file_name
5523         my $type;
5524
5525         # - hash or hash_base alone
5526         if ($hash || ($hash_base && !defined $file_name)) {
5527                 my $object_id = $hash || $hash_base;
5528
5529                 open my $fd, "-|", quote_command(
5530                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5531                         or die_error(404, "Object does not exist");
5532                 $type = <$fd>;
5533                 chomp $type;
5534                 close $fd
5535                         or die_error(404, "Object does not exist");
5536
5537         # - hash_base and file_name
5538         } elsif ($hash_base && defined $file_name) {
5539                 $file_name =~ s,/+$,,;
5540
5541                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5542                         or die_error(404, "Base object does not exist");
5543
5544                 # here errors should not hapen
5545                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5546                         or die_error(500, "Open git-ls-tree failed");
5547                 my $line = <$fd>;
5548                 close $fd;
5549
5550                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5551                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5552                         die_error(404, "File or directory for given base does not exist");
5553                 }
5554                 $type = $2;
5555                 $hash = $3;
5556         } else {
5557                 die_error(400, "Not enough information to find object");
5558         }
5559
5560         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5561                                           hash=>$hash, hash_base=>$hash_base,
5562                                           file_name=>$file_name),
5563                              -status => '302 Found');
5564 }
5565
5566 sub git_blobdiff {
5567         my $format = shift || 'html';
5568
5569         my $fd;
5570         my @difftree;
5571         my %diffinfo;
5572         my $expires;
5573
5574         # preparing $fd and %diffinfo for git_patchset_body
5575         # new style URI
5576         if (defined $hash_base && defined $hash_parent_base) {
5577                 if (defined $file_name) {
5578                         # read raw output
5579                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5580                                 $hash_parent_base, $hash_base,
5581                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5582                                 or die_error(500, "Open git-diff-tree failed");
5583                         @difftree = map { chomp; $_ } <$fd>;
5584                         close $fd
5585                                 or die_error(404, "Reading git-diff-tree failed");
5586                         @difftree
5587                                 or die_error(404, "Blob diff not found");
5588
5589                 } elsif (defined $hash &&
5590                          $hash =~ /[0-9a-fA-F]{40}/) {
5591                         # try to find filename from $hash
5592
5593                         # read filtered raw output
5594                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5595                                 $hash_parent_base, $hash_base, "--"
5596                                 or die_error(500, "Open git-diff-tree failed");
5597                         @difftree =
5598                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5599                                 # $hash == to_id
5600                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5601                                 map { chomp; $_ } <$fd>;
5602                         close $fd
5603                                 or die_error(404, "Reading git-diff-tree failed");
5604                         @difftree
5605                                 or die_error(404, "Blob diff not found");
5606
5607                 } else {
5608                         die_error(400, "Missing one of the blob diff parameters");
5609                 }
5610
5611                 if (@difftree > 1) {
5612                         die_error(400, "Ambiguous blob diff specification");
5613                 }
5614
5615                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5616                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5617                 $file_name   ||= $diffinfo{'to_file'};
5618
5619                 $hash_parent ||= $diffinfo{'from_id'};
5620                 $hash        ||= $diffinfo{'to_id'};
5621
5622                 # non-textual hash id's can be cached
5623                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5624                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5625                         $expires = '+1d';
5626                 }
5627
5628                 # open patch output
5629                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5630                         '-p', ($format eq 'html' ? "--full-index" : ()),
5631                         $hash_parent_base, $hash_base,
5632                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5633                         or die_error(500, "Open git-diff-tree failed");
5634         }
5635
5636         # old/legacy style URI -- not generated anymore since 1.4.3.
5637         if (!%diffinfo) {
5638                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5639         }
5640
5641         # header
5642         if ($format eq 'html') {
5643                 my $formats_nav =
5644                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5645                                 "raw");
5646                 git_header_html(undef, $expires);
5647                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5648                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5649                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5650                 } else {
5651                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5652                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5653                 }
5654                 if (defined $file_name) {
5655                         git_print_page_path($file_name, "blob", $hash_base);
5656                 } else {
5657                         print "<div class=\"page_path\"></div>\n";
5658                 }
5659
5660         } elsif ($format eq 'plain') {
5661                 print $cgi->header(
5662                         -type => 'text/plain',
5663                         -charset => 'utf-8',
5664                         -expires => $expires,
5665                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5666
5667                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5668
5669         } else {
5670                 die_error(400, "Unknown blobdiff format");
5671         }
5672
5673         # patch
5674         if ($format eq 'html') {
5675                 print "<div class=\"page_body\">\n";
5676
5677                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5678                 close $fd;
5679
5680                 print "</div>\n"; # class="page_body"
5681                 git_footer_html();
5682
5683         } else {
5684                 while (my $line = <$fd>) {
5685                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5686                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5687
5688                         print $line;
5689
5690                         last if $line =~ m!^\+\+\+!;
5691                 }
5692                 local $/ = undef;
5693                 print <$fd>;
5694                 close $fd;
5695         }
5696 }
5697
5698 sub git_blobdiff_plain {
5699         git_blobdiff('plain');
5700 }
5701
5702 sub git_commitdiff {
5703         my %params = @_;
5704         my $format = $params{-format} || 'html';
5705
5706         my ($patch_max) = gitweb_get_feature('patches');
5707         if ($format eq 'patch') {
5708                 die_error(403, "Patch view not allowed") unless $patch_max;
5709         }
5710
5711         $hash ||= $hash_base || "HEAD";
5712         my %co = parse_commit($hash)
5713             or die_error(404, "Unknown commit object");
5714
5715         # choose format for commitdiff for merge
5716         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5717                 $hash_parent = '--cc';
5718         }
5719         # we need to prepare $formats_nav before almost any parameter munging
5720         my $formats_nav;
5721         if ($format eq 'html') {
5722                 $formats_nav =
5723                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5724                                 "raw");
5725                 if ($patch_max && @{$co{'parents'}} <= 1) {
5726                         $formats_nav .= " | " .
5727                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5728                                         "patch");
5729                 }
5730
5731                 if (defined $hash_parent &&
5732                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5733                         # commitdiff with two commits given
5734                         my $hash_parent_short = $hash_parent;
5735                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5736                                 $hash_parent_short = substr($hash_parent, 0, 7);
5737                         }
5738                         $formats_nav .=
5739                                 ' (from';
5740                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5741                                 if ($co{'parents'}[$i] eq $hash_parent) {
5742                                         $formats_nav .= ' parent ' . ($i+1);
5743                                         last;
5744                                 }
5745                         }
5746                         $formats_nav .= ': ' .
5747                                 $cgi->a({-href => href(action=>"commitdiff",
5748                                                        hash=>$hash_parent)},
5749                                         esc_html($hash_parent_short)) .
5750                                 ')';
5751                 } elsif (!$co{'parent'}) {
5752                         # --root commitdiff
5753                         $formats_nav .= ' (initial)';
5754                 } elsif (scalar @{$co{'parents'}} == 1) {
5755                         # single parent commit
5756                         $formats_nav .=
5757                                 ' (parent: ' .
5758                                 $cgi->a({-href => href(action=>"commitdiff",
5759                                                        hash=>$co{'parent'})},
5760                                         esc_html(substr($co{'parent'}, 0, 7))) .
5761                                 ')';
5762                 } else {
5763                         # merge commit
5764                         if ($hash_parent eq '--cc') {
5765                                 $formats_nav .= ' | ' .
5766                                         $cgi->a({-href => href(action=>"commitdiff",
5767                                                                hash=>$hash, hash_parent=>'-c')},
5768                                                 'combined');
5769                         } else { # $hash_parent eq '-c'
5770                                 $formats_nav .= ' | ' .
5771                                         $cgi->a({-href => href(action=>"commitdiff",
5772                                                                hash=>$hash, hash_parent=>'--cc')},
5773                                                 'compact');
5774                         }
5775                         $formats_nav .=
5776                                 ' (merge: ' .
5777                                 join(' ', map {
5778                                         $cgi->a({-href => href(action=>"commitdiff",
5779                                                                hash=>$_)},
5780                                                 esc_html(substr($_, 0, 7)));
5781                                 } @{$co{'parents'}} ) .
5782                                 ')';
5783                 }
5784         }
5785
5786         my $hash_parent_param = $hash_parent;
5787         if (!defined $hash_parent_param) {
5788                 # --cc for multiple parents, --root for parentless
5789                 $hash_parent_param =
5790                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5791         }
5792
5793         # read commitdiff
5794         my $fd;
5795         my @difftree;
5796         if ($format eq 'html') {
5797                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5798                         "--no-commit-id", "--patch-with-raw", "--full-index",
5799                         $hash_parent_param, $hash, "--"
5800                         or die_error(500, "Open git-diff-tree failed");
5801
5802                 while (my $line = <$fd>) {
5803                         chomp $line;
5804                         # empty line ends raw part of diff-tree output
5805                         last unless $line;
5806                         push @difftree, scalar parse_difftree_raw_line($line);
5807                 }
5808
5809         } elsif ($format eq 'plain') {
5810                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5811                         '-p', $hash_parent_param, $hash, "--"
5812                         or die_error(500, "Open git-diff-tree failed");
5813         } elsif ($format eq 'patch') {
5814                 # For commit ranges, we limit the output to the number of
5815                 # patches specified in the 'patches' feature.
5816                 # For single commits, we limit the output to a single patch,
5817                 # diverging from the git-format-patch default.
5818                 my @commit_spec = ();
5819                 if ($hash_parent) {
5820                         if ($patch_max > 0) {
5821                                 push @commit_spec, "-$patch_max";
5822                         }
5823                         push @commit_spec, '-n', "$hash_parent..$hash";
5824                 } else {
5825                         if ($params{-single}) {
5826                                 push @commit_spec, '-1';
5827                         } else {
5828                                 if ($patch_max > 0) {
5829                                         push @commit_spec, "-$patch_max";
5830                                 }
5831                                 push @commit_spec, "-n";
5832                         }
5833                         push @commit_spec, '--root', $hash;
5834                 }
5835                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5836                         '--stdout', @commit_spec
5837                         or die_error(500, "Open git-format-patch failed");
5838         } else {
5839                 die_error(400, "Unknown commitdiff format");
5840         }
5841
5842         # non-textual hash id's can be cached
5843         my $expires;
5844         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5845                 $expires = "+1d";
5846         }
5847
5848         # write commit message
5849         if ($format eq 'html') {
5850                 my $refs = git_get_references();
5851                 my $ref = format_ref_marker($refs, $co{'id'});
5852
5853                 git_header_html(undef, $expires);
5854                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5855                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5856                 print "<div class=\"title_text\">\n" .
5857                       "<table class=\"object_header\">\n";
5858                 git_print_authorship_rows(\%co);
5859                 print "</table>".
5860                       "</div>\n";
5861                 print "<div class=\"page_body\">\n";
5862                 if (@{$co{'comment'}} > 1) {
5863                         print "<div class=\"log\">\n";
5864                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5865                         print "</div>\n"; # class="log"
5866                 }
5867
5868         } elsif ($format eq 'plain') {
5869                 my $refs = git_get_references("tags");
5870                 my $tagname = git_get_rev_name_tags($hash);
5871                 my $filename = basename($project) . "-$hash.patch";
5872
5873                 print $cgi->header(
5874                         -type => 'text/plain',
5875                         -charset => 'utf-8',
5876                         -expires => $expires,
5877                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5878                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5879                 print "From: " . to_utf8($co{'author'}) . "\n";
5880                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5881                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5882
5883                 print "X-Git-Tag: $tagname\n" if $tagname;
5884                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5885
5886                 foreach my $line (@{$co{'comment'}}) {
5887                         print to_utf8($line) . "\n";
5888                 }
5889                 print "---\n\n";
5890         } elsif ($format eq 'patch') {
5891                 my $filename = basename($project) . "-$hash.patch";
5892
5893                 print $cgi->header(
5894                         -type => 'text/plain',
5895                         -charset => 'utf-8',
5896                         -expires => $expires,
5897                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5898         }
5899
5900         # write patch
5901         if ($format eq 'html') {
5902                 my $use_parents = !defined $hash_parent ||
5903                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5904                 git_difftree_body(\@difftree, $hash,
5905                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5906                 print "<br/>\n";
5907
5908                 git_patchset_body($fd, \@difftree, $hash,
5909                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5910                 close $fd;
5911                 print "</div>\n"; # class="page_body"
5912                 git_footer_html();
5913
5914         } elsif ($format eq 'plain') {
5915                 local $/ = undef;
5916                 print <$fd>;
5917                 close $fd
5918                         or print "Reading git-diff-tree failed\n";
5919         } elsif ($format eq 'patch') {
5920                 local $/ = undef;
5921                 print <$fd>;
5922                 close $fd
5923                         or print "Reading git-format-patch failed\n";
5924         }
5925 }
5926
5927 sub git_commitdiff_plain {
5928         git_commitdiff(-format => 'plain');
5929 }
5930
5931 # format-patch-style patches
5932 sub git_patch {
5933         git_commitdiff(-format => 'patch', -single => 1);
5934 }
5935
5936 sub git_patches {
5937         git_commitdiff(-format => 'patch');
5938 }
5939
5940 sub git_history {
5941         if (!defined $hash_base) {
5942                 $hash_base = git_get_head_hash($project);
5943         }
5944         if (!defined $page) {
5945                 $page = 0;
5946         }
5947         my $ftype;
5948         my %co = parse_commit($hash_base)
5949             or die_error(404, "Unknown commit object");
5950
5951         my $refs = git_get_references();
5952         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5953
5954         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5955                                        $file_name, "--full-history")
5956             or die_error(404, "No such file or directory on given branch");
5957
5958         if (!defined $hash && defined $file_name) {
5959                 # some commits could have deleted file in question,
5960                 # and not have it in tree, but one of them has to have it
5961                 for (my $i = 0; $i <= @commitlist; $i++) {
5962                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5963                         last if defined $hash;
5964                 }
5965         }
5966         if (defined $hash) {
5967                 $ftype = git_get_type($hash);
5968         }
5969         if (!defined $ftype) {
5970                 die_error(500, "Unknown type of object");
5971         }
5972
5973         my $paging_nav = '';
5974         if ($page > 0) {
5975                 $paging_nav .=
5976                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5977                                                file_name=>$file_name)},
5978                                 "first");
5979                 $paging_nav .= " &sdot; " .
5980                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5981                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5982         } else {
5983                 $paging_nav .= "first";
5984                 $paging_nav .= " &sdot; prev";
5985         }
5986         my $next_link = '';
5987         if ($#commitlist >= 100) {
5988                 $next_link =
5989                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5990                                  -accesskey => "n", -title => "Alt-n"}, "next");
5991                 $paging_nav .= " &sdot; $next_link";
5992         } else {
5993                 $paging_nav .= " &sdot; next";
5994         }
5995
5996         git_header_html();
5997         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5998         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5999         git_print_page_path($file_name, $ftype, $hash_base);
6000
6001         git_history_body(\@commitlist, 0, 99,
6002                          $refs, $hash_base, $ftype, $next_link);
6003
6004         git_footer_html();
6005 }
6006
6007 sub git_search {
6008         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6009         if (!defined $searchtext) {
6010                 die_error(400, "Text field is empty");
6011         }
6012         if (!defined $hash) {
6013                 $hash = git_get_head_hash($project);
6014         }
6015         my %co = parse_commit($hash);
6016         if (!%co) {
6017                 die_error(404, "Unknown commit object");
6018         }
6019         if (!defined $page) {
6020                 $page = 0;
6021         }
6022
6023         $searchtype ||= 'commit';
6024         if ($searchtype eq 'pickaxe') {
6025                 # pickaxe may take all resources of your box and run for several minutes
6026                 # with every query - so decide by yourself how public you make this feature
6027                 gitweb_check_feature('pickaxe')
6028                     or die_error(403, "Pickaxe is disabled");
6029         }
6030         if ($searchtype eq 'grep') {
6031                 gitweb_check_feature('grep')
6032                     or die_error(403, "Grep is disabled");
6033         }
6034
6035         git_header_html();
6036
6037         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6038                 my $greptype;
6039                 if ($searchtype eq 'commit') {
6040                         $greptype = "--grep=";
6041                 } elsif ($searchtype eq 'author') {
6042                         $greptype = "--author=";
6043                 } elsif ($searchtype eq 'committer') {
6044                         $greptype = "--committer=";
6045                 }
6046                 $greptype .= $searchtext;
6047                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6048                                                $greptype, '--regexp-ignore-case',
6049                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6050
6051                 my $paging_nav = '';
6052                 if ($page > 0) {
6053                         $paging_nav .=
6054                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6055                                                        searchtext=>$searchtext,
6056                                                        searchtype=>$searchtype)},
6057                                         "first");
6058                         $paging_nav .= " &sdot; " .
6059                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6060                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6061                 } else {
6062                         $paging_nav .= "first";
6063                         $paging_nav .= " &sdot; prev";
6064                 }
6065                 my $next_link = '';
6066                 if ($#commitlist >= 100) {
6067                         $next_link =
6068                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6069                                          -accesskey => "n", -title => "Alt-n"}, "next");
6070                         $paging_nav .= " &sdot; $next_link";
6071                 } else {
6072                         $paging_nav .= " &sdot; next";
6073                 }
6074
6075                 if ($#commitlist >= 100) {
6076                 }
6077
6078                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6079                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6080                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6081         }
6082
6083         if ($searchtype eq 'pickaxe') {
6084                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6085                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6086
6087                 print "<table class=\"pickaxe search\">\n";
6088                 my $alternate = 1;
6089                 local $/ = "\n";
6090                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6091                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6092                         ($search_use_regexp ? '--pickaxe-regex' : ());
6093                 undef %co;
6094                 my @files;
6095                 while (my $line = <$fd>) {
6096                         chomp $line;
6097                         next unless $line;
6098
6099                         my %set = parse_difftree_raw_line($line);
6100                         if (defined $set{'commit'}) {
6101                                 # finish previous commit
6102                                 if (%co) {
6103                                         print "</td>\n" .
6104                                               "<td class=\"link\">" .
6105                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6106                                               " | " .
6107                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6108                                         print "</td>\n" .
6109                                               "</tr>\n";
6110                                 }
6111
6112                                 if ($alternate) {
6113                                         print "<tr class=\"dark\">\n";
6114                                 } else {
6115                                         print "<tr class=\"light\">\n";
6116                                 }
6117                                 $alternate ^= 1;
6118                                 %co = parse_commit($set{'commit'});
6119                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6120                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6121                                       "<td><i>$author</i></td>\n" .
6122                                       "<td>" .
6123                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6124                                               -class => "list subject"},
6125                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6126                         } elsif (defined $set{'to_id'}) {
6127                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6128
6129                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6130                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6131                                               -class => "list"},
6132                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6133                                       "<br/>\n";
6134                         }
6135                 }
6136                 close $fd;
6137
6138                 # finish last commit (warning: repetition!)
6139                 if (%co) {
6140                         print "</td>\n" .
6141                               "<td class=\"link\">" .
6142                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6143                               " | " .
6144                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6145                         print "</td>\n" .
6146                               "</tr>\n";
6147                 }
6148
6149                 print "</table>\n";
6150         }
6151
6152         if ($searchtype eq 'grep') {
6153                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6154                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6155
6156                 print "<table class=\"grep_search\">\n";
6157                 my $alternate = 1;
6158                 my $matches = 0;
6159                 local $/ = "\n";
6160                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6161                         $search_use_regexp ? ('-E', '-i') : '-F',
6162                         $searchtext, $co{'tree'};
6163                 my $lastfile = '';
6164                 while (my $line = <$fd>) {
6165                         chomp $line;
6166                         my ($file, $lno, $ltext, $binary);
6167                         last if ($matches++ > 1000);
6168                         if ($line =~ /^Binary file (.+) matches$/) {
6169                                 $file = $1;
6170                                 $binary = 1;
6171                         } else {
6172                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6173                         }
6174                         if ($file ne $lastfile) {
6175                                 $lastfile and print "</td></tr>\n";
6176                                 if ($alternate++) {
6177                                         print "<tr class=\"dark\">\n";
6178                                 } else {
6179                                         print "<tr class=\"light\">\n";
6180                                 }
6181                                 print "<td class=\"list\">".
6182                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6183                                                                file_name=>"$file"),
6184                                                 -class => "list"}, esc_path($file));
6185                                 print "</td><td>\n";
6186                                 $lastfile = $file;
6187                         }
6188                         if ($binary) {
6189                                 print "<div class=\"binary\">Binary file</div>\n";
6190                         } else {
6191                                 $ltext = untabify($ltext);
6192                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6193                                         $ltext = esc_html($1, -nbsp=>1);
6194                                         $ltext .= '<span class="match">';
6195                                         $ltext .= esc_html($2, -nbsp=>1);
6196                                         $ltext .= '</span>';
6197                                         $ltext .= esc_html($3, -nbsp=>1);
6198                                 } else {
6199                                         $ltext = esc_html($ltext, -nbsp=>1);
6200                                 }
6201                                 print "<div class=\"pre\">" .
6202                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6203                                                                file_name=>"$file").'#l'.$lno,
6204                                                 -class => "linenr"}, sprintf('%4i', $lno))
6205                                         . ' ' .  $ltext . "</div>\n";
6206                         }
6207                 }
6208                 if ($lastfile) {
6209                         print "</td></tr>\n";
6210                         if ($matches > 1000) {
6211                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6212                         }
6213                 } else {
6214                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6215                 }
6216                 close $fd;
6217
6218                 print "</table>\n";
6219         }
6220         git_footer_html();
6221 }
6222
6223 sub git_search_help {
6224         git_header_html();
6225         git_print_page_nav('','', $hash,$hash,$hash);
6226         print <<EOT;
6227 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6228 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6229 the pattern entered is recognized as the POSIX extended
6230 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6231 insensitive).</p>
6232 <dl>
6233 <dt><b>commit</b></dt>
6234 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6235 EOT
6236         my $have_grep = gitweb_check_feature('grep');
6237         if ($have_grep) {
6238                 print <<EOT;
6239 <dt><b>grep</b></dt>
6240 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6241     a different one) are searched for the given pattern. On large trees, this search can take
6242 a while and put some strain on the server, so please use it with some consideration. Note that
6243 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6244 case-sensitive.</dd>
6245 EOT
6246         }
6247         print <<EOT;
6248 <dt><b>author</b></dt>
6249 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6250 <dt><b>committer</b></dt>
6251 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6252 EOT
6253         my $have_pickaxe = gitweb_check_feature('pickaxe');
6254         if ($have_pickaxe) {
6255                 print <<EOT;
6256 <dt><b>pickaxe</b></dt>
6257 <dd>All commits that caused the string to appear or disappear from any file (changes that
6258 added, removed or "modified" the string) will be listed. This search can take a while and
6259 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6260 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6261 EOT
6262         }
6263         print "</dl>\n";
6264         git_footer_html();
6265 }
6266
6267 sub git_shortlog {
6268         my $head = git_get_head_hash($project);
6269         if (!defined $hash) {
6270                 $hash = $head;
6271         }
6272         if (!defined $page) {
6273                 $page = 0;
6274         }
6275         my $refs = git_get_references();
6276
6277         my $commit_hash = $hash;
6278         if (defined $hash_parent) {
6279                 $commit_hash = "$hash_parent..$hash";
6280         }
6281         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6282
6283         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6284         my $next_link = '';
6285         if ($#commitlist >= 100) {
6286                 $next_link =
6287                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6288                                  -accesskey => "n", -title => "Alt-n"}, "next");
6289         }
6290         my $patch_max = gitweb_check_feature('patches');
6291         if ($patch_max) {
6292                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6293                         $paging_nav .= " &sdot; " .
6294                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6295                                         "patches");
6296                 }
6297         }
6298
6299         git_header_html();
6300         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6301         git_print_header_div('summary', $project);
6302
6303         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6304
6305         git_footer_html();
6306 }
6307
6308 ## ......................................................................
6309 ## feeds (RSS, Atom; OPML)
6310
6311 sub git_feed {
6312         my $format = shift || 'atom';
6313         my $have_blame = gitweb_check_feature('blame');
6314
6315         # Atom: http://www.atomenabled.org/developers/syndication/
6316         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6317         if ($format ne 'rss' && $format ne 'atom') {
6318                 die_error(400, "Unknown web feed format");
6319         }
6320
6321         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6322         my $head = $hash || 'HEAD';
6323         my @commitlist = parse_commits($head, 150, 0, $file_name);
6324
6325         my %latest_commit;
6326         my %latest_date;
6327         my $content_type = "application/$format+xml";
6328         if (defined $cgi->http('HTTP_ACCEPT') &&
6329                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6330                 # browser (feed reader) prefers text/xml
6331                 $content_type = 'text/xml';
6332         }
6333         if (defined($commitlist[0])) {
6334                 %latest_commit = %{$commitlist[0]};
6335                 my $latest_epoch = $latest_commit{'committer_epoch'};
6336                 %latest_date   = parse_date($latest_epoch);
6337                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6338                 if (defined $if_modified) {
6339                         my $since;
6340                         if (eval { require HTTP::Date; 1; }) {
6341                                 $since = HTTP::Date::str2time($if_modified);
6342                         } elsif (eval { require Time::ParseDate; 1; }) {
6343                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6344                         }
6345                         if (defined $since && $latest_epoch <= $since) {
6346                                 print $cgi->header(
6347                                         -type => $content_type,
6348                                         -charset => 'utf-8',
6349                                         -last_modified => $latest_date{'rfc2822'},
6350                                         -status => '304 Not Modified');
6351                                 return;
6352                         }
6353                 }
6354                 print $cgi->header(
6355                         -type => $content_type,
6356                         -charset => 'utf-8',
6357                         -last_modified => $latest_date{'rfc2822'});
6358         } else {
6359                 print $cgi->header(
6360                         -type => $content_type,
6361                         -charset => 'utf-8');
6362         }
6363
6364         # Optimization: skip generating the body if client asks only
6365         # for Last-Modified date.
6366         return if ($cgi->request_method() eq 'HEAD');
6367
6368         # header variables
6369         my $title = "$site_name - $project/$action";
6370         my $feed_type = 'log';
6371         if (defined $hash) {
6372                 $title .= " - '$hash'";
6373                 $feed_type = 'branch log';
6374                 if (defined $file_name) {
6375                         $title .= " :: $file_name";
6376                         $feed_type = 'history';
6377                 }
6378         } elsif (defined $file_name) {
6379                 $title .= " - $file_name";
6380                 $feed_type = 'history';
6381         }
6382         $title .= " $feed_type";
6383         my $descr = git_get_project_description($project);
6384         if (defined $descr) {
6385                 $descr = esc_html($descr);
6386         } else {
6387                 $descr = "$project " .
6388                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6389                          " feed";
6390         }
6391         my $owner = git_get_project_owner($project);
6392         $owner = esc_html($owner);
6393
6394         #header
6395         my $alt_url;
6396         if (defined $file_name) {
6397                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6398         } elsif (defined $hash) {
6399                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6400         } else {
6401                 $alt_url = href(-full=>1, action=>"summary");
6402         }
6403         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6404         if ($format eq 'rss') {
6405                 print <<XML;
6406 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6407 <channel>
6408 XML
6409                 print "<title>$title</title>\n" .
6410                       "<link>$alt_url</link>\n" .
6411                       "<description>$descr</description>\n" .
6412                       "<language>en</language>\n" .
6413                       # project owner is responsible for 'editorial' content
6414                       "<managingEditor>$owner</managingEditor>\n";
6415                 if (defined $logo || defined $favicon) {
6416                         # prefer the logo to the favicon, since RSS
6417                         # doesn't allow both
6418                         my $img = esc_url($logo || $favicon);
6419                         print "<image>\n" .
6420                               "<url>$img</url>\n" .
6421                               "<title>$title</title>\n" .
6422                               "<link>$alt_url</link>\n" .
6423                               "</image>\n";
6424                 }
6425                 if (%latest_date) {
6426                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6427                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6428                 }
6429                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6430         } elsif ($format eq 'atom') {
6431                 print <<XML;
6432 <feed xmlns="http://www.w3.org/2005/Atom">
6433 XML
6434                 print "<title>$title</title>\n" .
6435                       "<subtitle>$descr</subtitle>\n" .
6436                       '<link rel="alternate" type="text/html" href="' .
6437                       $alt_url . '" />' . "\n" .
6438                       '<link rel="self" type="' . $content_type . '" href="' .
6439                       $cgi->self_url() . '" />' . "\n" .
6440                       "<id>" . href(-full=>1) . "</id>\n" .
6441                       # use project owner for feed author
6442                       "<author><name>$owner</name></author>\n";
6443                 if (defined $favicon) {
6444                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6445                 }
6446                 if (defined $logo_url) {
6447                         # not twice as wide as tall: 72 x 27 pixels
6448                         print "<logo>" . esc_url($logo) . "</logo>\n";
6449                 }
6450                 if (! %latest_date) {
6451                         # dummy date to keep the feed valid until commits trickle in:
6452                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6453                 } else {
6454                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6455                 }
6456                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6457         }
6458
6459         # contents
6460         for (my $i = 0; $i <= $#commitlist; $i++) {
6461                 my %co = %{$commitlist[$i]};
6462                 my $commit = $co{'id'};
6463                 # we read 150, we always show 30 and the ones more recent than 48 hours
6464                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6465                         last;
6466                 }
6467                 my %cd = parse_date($co{'author_epoch'});
6468
6469                 # get list of changed files
6470                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6471                         $co{'parent'} || "--root",
6472                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6473                         or next;
6474                 my @difftree = map { chomp; $_ } <$fd>;
6475                 close $fd
6476                         or next;
6477
6478                 # print element (entry, item)
6479                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6480                 if ($format eq 'rss') {
6481                         print "<item>\n" .
6482                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6483                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6484                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6485                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6486                               "<link>$co_url</link>\n" .
6487                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6488                               "<content:encoded>" .
6489                               "<![CDATA[\n";
6490                 } elsif ($format eq 'atom') {
6491                         print "<entry>\n" .
6492                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6493                               "<updated>$cd{'iso-8601'}</updated>\n" .
6494                               "<author>\n" .
6495                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6496                         if ($co{'author_email'}) {
6497                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6498                         }
6499                         print "</author>\n" .
6500                               # use committer for contributor
6501                               "<contributor>\n" .
6502                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6503                         if ($co{'committer_email'}) {
6504                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6505                         }
6506                         print "</contributor>\n" .
6507                               "<published>$cd{'iso-8601'}</published>\n" .
6508                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6509                               "<id>$co_url</id>\n" .
6510                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6511                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6512                 }
6513                 my $comment = $co{'comment'};
6514                 print "<pre>\n";
6515                 foreach my $line (@$comment) {
6516                         $line = esc_html($line);
6517                         print "$line\n";
6518                 }
6519                 print "</pre><ul>\n";
6520                 foreach my $difftree_line (@difftree) {
6521                         my %difftree = parse_difftree_raw_line($difftree_line);
6522                         next if !$difftree{'from_id'};
6523
6524                         my $file = $difftree{'file'} || $difftree{'to_file'};
6525
6526                         print "<li>" .
6527                               "[" .
6528                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6529                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6530                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6531                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6532                                       -title => "diff"}, 'D');
6533                         if ($have_blame) {
6534                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6535                                                              file_name=>$file, hash_base=>$commit),
6536                                               -title => "blame"}, 'B');
6537                         }
6538                         # if this is not a feed of a file history
6539                         if (!defined $file_name || $file_name ne $file) {
6540                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6541                                                              file_name=>$file, hash=>$commit),
6542                                               -title => "history"}, 'H');
6543                         }
6544                         $file = esc_path($file);
6545                         print "] ".
6546                               "$file</li>\n";
6547                 }
6548                 if ($format eq 'rss') {
6549                         print "</ul>]]>\n" .
6550                               "</content:encoded>\n" .
6551                               "</item>\n";
6552                 } elsif ($format eq 'atom') {
6553                         print "</ul>\n</div>\n" .
6554                               "</content>\n" .
6555                               "</entry>\n";
6556                 }
6557         }
6558
6559         # end of feed
6560         if ($format eq 'rss') {
6561                 print "</channel>\n</rss>\n";
6562         } elsif ($format eq 'atom') {
6563                 print "</feed>\n";
6564         }
6565 }
6566
6567 sub git_rss {
6568         git_feed('rss');
6569 }
6570
6571 sub git_atom {
6572         git_feed('atom');
6573 }
6574
6575 sub git_opml {
6576         my @list = git_get_projects_list();
6577
6578         print $cgi->header(
6579                 -type => 'text/xml',
6580                 -charset => 'utf-8',
6581                 -content_disposition => 'inline; filename="opml.xml"');
6582
6583         print <<XML;
6584 <?xml version="1.0" encoding="utf-8"?>
6585 <opml version="1.0">
6586 <head>
6587   <title>$site_name OPML Export</title>
6588 </head>
6589 <body>
6590 <outline text="git RSS feeds">
6591 XML
6592
6593         foreach my $pr (@list) {
6594                 my %proj = %$pr;
6595                 my $head = git_get_head_hash($proj{'path'});
6596                 if (!defined $head) {
6597                         next;
6598                 }
6599                 $git_dir = "$projectroot/$proj{'path'}";
6600                 my %co = parse_commit($head);
6601                 if (!%co) {
6602                         next;
6603                 }
6604
6605                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6606                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6607                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6608                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6609         }
6610         print <<XML;
6611 </outline>
6612 </body>
6613 </opml>
6614 XML
6615 }