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 set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "++GIT_VERSION++";
  32
  33 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  34 sub evaluate_uri {
  35         our $cgi;
  36
  37         our $my_url = $cgi->url();
  38         our $my_uri = $cgi->url(-absolute => 1);
  39
  40         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  41         # needed and used only for URLs with nonempty PATH_INFO
  42         our $base_url = $my_url;
  43
  44         # When the script is used as DirectoryIndex, the URL does not contain the name
  45         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  46         # have to do it ourselves. We make $path_info global because it's also used
  47         # later on.
  48         #
  49         # Another issue with the script being the DirectoryIndex is that the resulting
  50         # $my_url data is not the full script URL: this is good, because we want
  51         # generated links to keep implying the script name if it wasn't explicitly
  52         # indicated in the URL we're handling, but it means that $my_url cannot be used
  53         # as base URL.
  54         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  55         # to build the base URL ourselves:
  56         our $path_info = $ENV{"PATH_INFO"};
  57         if ($path_info) {
  58                 if ($my_url =~ s,\Q$path_info\E$,, &&
  59                     $my_uri =~ s,\Q$path_info\E$,, &&
  60                     defined $ENV{'SCRIPT_NAME'}) {
  61                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  62                 }
  63         }
  64
  65         # target of the home link on top of all pages
  66         our $home_link = $my_uri || "/";
  67 }
  68
  69 # core git executable to use
  70 # this can just be "git" if your webserver has a sensible PATH
  71 our $GIT = "++GIT_BINDIR++/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "++GITWEB_PROJECTROOT++";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  83
  84 # name of your site or organization to appear in page titles
  85 # replace this with something more descriptive for clearer bookmarks
  86 our $site_name = "++GITWEB_SITENAME++"
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "++GITWEB_SITE_HEADER++";
  91 # html text to include at home page
  92 our $home_text = "++GITWEB_HOMETEXT++";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "++GITWEB_SITE_FOOTER++";
  95
  96 # URI of stylesheets
  97 our @stylesheets = ("++GITWEB_CSS++");
  98 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  99 our $stylesheet = undef;
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # information about snapshot formats that gitweb is capable of serving
 169 our %known_snapshot_formats = (
 170         # name => {
 171         #       'display' => display name,
 172         #       'type' => mime type,
 173         #       'suffix' => filename suffix,
 174         #       'format' => --format for git-archive,
 175         #       'compressor' => [compressor command and arguments]
 176         #                       (array reference, optional)
 177         #       'disabled' => boolean (optional)}
 178         #
 179         'tgz' => {
 180                 'display' => 'tar.gz',
 181                 'type' => 'application/x-gzip',
 182                 'suffix' => '.tar.gz',
 183                 'format' => 'tar',
 184                 'compressor' => ['gzip']},
 185
 186         'tbz2' => {
 187                 'display' => 'tar.bz2',
 188                 'type' => 'application/x-bzip2',
 189                 'suffix' => '.tar.bz2',
 190                 'format' => 'tar',
 191                 'compressor' => ['bzip2']},
 192
 193         'txz' => {
 194                 'display' => 'tar.xz',
 195                 'type' => 'application/x-xz',
 196                 'suffix' => '.tar.xz',
 197                 'format' => 'tar',
 198                 'compressor' => ['xz'],
 199                 'disabled' => 1},
 200
 201         'zip' => {
 202                 'display' => 'zip',
 203                 'type' => 'application/x-zip',
 204                 'suffix' => '.zip',
 205                 'format' => 'zip'},
 206 );
 207
 208 # Aliases so we understand old gitweb.snapshot values in repository
 209 # configuration.
 210 our %known_snapshot_format_aliases = (
 211         'gzip'  => 'tgz',
 212         'bzip2' => 'tbz2',
 213         'xz'    => 'txz',
 214
 215         # backward compatibility: legacy gitweb config support
 216         'x-gzip' => undef, 'gz' => undef,
 217         'x-bzip2' => undef, 'bz2' => undef,
 218         'x-zip' => undef, '' => undef,
 219 );
 220
 221 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 222 # are changed, it may be appropriate to change these values too via
 223 # $GITWEB_CONFIG.
 224 our %avatar_size = (
 225         'default' => 16,
 226         'double'  => 32
 227 );
 228
 229 # Used to set the maximum load that we will still respond to gitweb queries.
 230 # If server load exceed this value then return "503 server busy" error.
 231 # If gitweb cannot determined server load, it is taken to be 0.
 232 # Leave it undefined (or set to 'undef') to turn off load checking.
 233 our $maxload = 300;
 234
 235 # You define site-wide feature defaults here; override them with
 236 # $GITWEB_CONFIG as necessary.
 237 our %feature = (
 238         # feature => {
 239         #       'sub' => feature-sub (subroutine),
 240         #       'override' => allow-override (boolean),
 241         #       'default' => [ default options...] (array reference)}
 242         #
 243         # if feature is overridable (it means that allow-override has true value),
 244         # then feature-sub will be called with default options as parameters;
 245         # return value of feature-sub indicates if to enable specified feature
 246         #
 247         # if there is no 'sub' key (no feature-sub), then feature cannot be
 248         # overriden
 249         #
 250         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 251         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 252         # is enabled
 253
 254         # Enable the 'blame' blob view, showing the last commit that modified
 255         # each line in the file. This can be very CPU-intensive.
 256
 257         # To enable system wide have in $GITWEB_CONFIG
 258         # $feature{'blame'}{'default'} = [1];
 259         # To have project specific config enable override in $GITWEB_CONFIG
 260         # $feature{'blame'}{'override'} = 1;
 261         # and in project config gitweb.blame = 0|1;
 262         'blame' => {
 263                 'sub' => sub { feature_bool('blame', @_) },
 264                 'override' => 0,
 265                 'default' => [0]},
 266
 267         # Enable the 'snapshot' link, providing a compressed archive of any
 268         # tree. This can potentially generate high traffic if you have large
 269         # project.
 270
 271         # Value is a list of formats defined in %known_snapshot_formats that
 272         # you wish to offer.
 273         # To disable system wide have in $GITWEB_CONFIG
 274         # $feature{'snapshot'}{'default'} = [];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'snapshot'}{'override'} = 1;
 277         # and in project config, a comma-separated list of formats or "none"
 278         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 279         'snapshot' => {
 280                 'sub' => \&feature_snapshot,
 281                 'override' => 0,
 282                 'default' => ['tgz']},
 283
 284         # Enable text search, which will list the commits which match author,
 285         # committer or commit text to a given string.  Enabled by default.
 286         # Project specific override is not supported.
 287         'search' => {
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable grep search, which will list the files in currently selected
 292         # tree containing the given string. Enabled by default. This can be
 293         # potentially CPU-intensive, of course.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'grep'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'grep'}{'override'} = 1;
 299         # and in project config gitweb.grep = 0|1;
 300         'grep' => {
 301                 'sub' => sub { feature_bool('grep', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable the pickaxe search, which will list the commits that modified
 306         # a given string in a file. This can be practical and quite faster
 307         # alternative to 'blame', but still potentially CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'pickaxe'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'pickaxe'}{'override'} = 1;
 313         # and in project config gitweb.pickaxe = 0|1;
 314         'pickaxe' => {
 315                 'sub' => sub { feature_bool('pickaxe', @_) },
 316                 'override' => 0,
 317                 'default' => [1]},
 318
 319         # Enable showing size of blobs in a 'tree' view, in a separate
 320         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 321
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'show-sizes'}{'default'} = [0];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'show-sizes'}{'override'} = 1;
 326         # and in project config gitweb.showsizes = 0|1;
 327         'show-sizes' => {
 328                 'sub' => sub { feature_bool('showsizes', @_) },
 329                 'override' => 0,
 330                 'default' => [1]},
 331
 332         # Make gitweb use an alternative format of the URLs which can be
 333         # more readable and natural-looking: project name is embedded
 334         # directly in the path and the query string contains other
 335         # auxiliary information. All gitweb installations recognize
 336         # URL in either format; this configures in which formats gitweb
 337         # generates links.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pathinfo'}{'default'} = [1];
 341         # Project specific override is not supported.
 342
 343         # Note that you will need to change the default location of CSS,
 344         # favicon, logo and possibly other files to an absolute URL. Also,
 345         # if gitweb.cgi serves as your indexfile, you will need to force
 346         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 347         'pathinfo' => {
 348                 'override' => 0,
 349                 'default' => [0]},
 350
 351         # Make gitweb consider projects in project root subdirectories
 352         # to be forks of existing projects. Given project $projname.git,
 353         # projects matching $projname/*.git will not be shown in the main
 354         # projects list, instead a '+' mark will be added to $projname
 355         # there and a 'forks' view will be enabled for the project, listing
 356         # all the forks. If project list is taken from a file, forks have
 357         # to be listed after the main project.
 358
 359         # To enable system wide have in $GITWEB_CONFIG
 360         # $feature{'forks'}{'default'} = [1];
 361         # Project specific override is not supported.
 362         'forks' => {
 363                 'override' => 0,
 364                 'default' => [0]},
 365
 366         # Insert custom links to the action bar of all project pages.
 367         # This enables you mainly to link to third-party scripts integrating
 368         # into gitweb; e.g. git-browser for graphical history representation
 369         # or custom web-based repository administration interface.
 370
 371         # The 'default' value consists of a list of triplets in the form
 372         # (label, link, position) where position is the label after which
 373         # to insert the link and link is a format string where %n expands
 374         # to the project name, %f to the project path within the filesystem,
 375         # %h to the current hash (h gitweb parameter) and %b to the current
 376         # hash base (hb gitweb parameter); %% expands to %.
 377
 378         # To enable system wide have in $GITWEB_CONFIG e.g.
 379         # $feature{'actions'}{'default'} = [('graphiclog',
 380         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 381         # Project specific override is not supported.
 382         'actions' => {
 383                 'override' => 0,
 384                 'default' => []},
 385
 386         # Allow gitweb scan project content tags described in ctags/
 387         # of project repository, and display the popular Web 2.0-ish
 388         # "tag cloud" near the project list. Note that this is something
 389         # COMPLETELY different from the normal Git tags.
 390
 391         # gitweb by itself can show existing tags, but it does not handle
 392         # tagging itself; you need an external application for that.
 393         # For an example script, check Girocco's cgi/tagproj.cgi.
 394         # You may want to install the HTML::TagCloud Perl module to get
 395         # a pretty tag cloud instead of just a list of tags.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 399         # Project specific override is not supported.
 400         'ctags' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # The maximum number of patches in a patchset generated in patch
 405         # view. Set this to 0 or undef to disable patch view, or to a
 406         # negative number to remove any limit.
 407
 408         # To disable system wide have in $GITWEB_CONFIG
 409         # $feature{'patches'}{'default'} = [0];
 410         # To have project specific config enable override in $GITWEB_CONFIG
 411         # $feature{'patches'}{'override'} = 1;
 412         # and in project config gitweb.patches = 0|n;
 413         # where n is the maximum number of patches allowed in a patchset.
 414         'patches' => {
 415                 'sub' => \&feature_patches,
 416                 'override' => 0,
 417                 'default' => [16]},
 418
 419         # Avatar support. When this feature is enabled, views such as
 420         # shortlog or commit will display an avatar associated with
 421         # the email of the committer(s) and/or author(s).
 422
 423         # Currently available providers are gravatar and picon.
 424         # If an unknown provider is specified, the feature is disabled.
 425
 426         # Gravatar depends on Digest::MD5.
 427         # Picon currently relies on the indiana.edu database.
 428
 429         # To enable system wide have in $GITWEB_CONFIG
 430         # $feature{'avatar'}{'default'} = ['<provider>'];
 431         # where <provider> is either gravatar or picon.
 432         # To have project specific config enable override in $GITWEB_CONFIG
 433         # $feature{'avatar'}{'override'} = 1;
 434         # and in project config gitweb.avatar = <provider>;
 435         'avatar' => {
 436                 'sub' => \&feature_avatar,
 437                 'override' => 0,
 438                 'default' => ['']},
 439
 440         # Enable displaying how much time and how many git commands
 441         # it took to generate and display page.  Disabled by default.
 442         # Project specific override is not supported.
 443         'timed' => {
 444                 'override' => 0,
 445                 'default' => [0]},
 446
 447         # Enable turning some links into links to actions which require
 448         # JavaScript to run (like 'blame_incremental').  Not enabled by
 449         # default.  Project specific override is currently not supported.
 450         'javascript-actions' => {
 451                 'override' => 0,
 452                 'default' => [0]},
 453 );
 454
 455 sub gitweb_get_feature {
 456         my ($name) = @_;
 457         return unless exists $feature{$name};
 458         my ($sub, $override, @defaults) = (
 459                 $feature{$name}{'sub'},
 460                 $feature{$name}{'override'},
 461                 @{$feature{$name}{'default'}});
 462         # project specific override is possible only if we have project
 463         our $git_dir; # global variable, declared later
 464         if (!$override || !defined $git_dir) {
 465                 return @defaults;
 466         }
 467         if (!defined $sub) {
 468                 warn "feature $name is not overridable";
 469                 return @defaults;
 470         }
 471         return $sub->(@defaults);
 472 }
 473
 474 # A wrapper to check if a given feature is enabled.
 475 # With this, you can say
 476 #
 477 #   my $bool_feat = gitweb_check_feature('bool_feat');
 478 #   gitweb_check_feature('bool_feat') or somecode;
 479 #
 480 # instead of
 481 #
 482 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 483 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 484 #
 485 sub gitweb_check_feature {
 486         return (gitweb_get_feature(@_))[0];
 487 }
 488
 489
 490 sub feature_bool {
 491         my $key = shift;
 492         my ($val) = git_get_project_config($key, '--bool');
 493
 494         if (!defined $val) {
 495                 return ($_[0]);
 496         } elsif ($val eq 'true') {
 497                 return (1);
 498         } elsif ($val eq 'false') {
 499                 return (0);
 500         }
 501 }
 502
 503 sub feature_snapshot {
 504         my (@fmts) = @_;
 505
 506         my ($val) = git_get_project_config('snapshot');
 507
 508         if ($val) {
 509                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 510         }
 511
 512         return @fmts;
 513 }
 514
 515 sub feature_patches {
 516         my @val = (git_get_project_config('patches', '--int'));
 517
 518         if (@val) {
 519                 return @val;
 520         }
 521
 522         return ($_[0]);
 523 }
 524
 525 sub feature_avatar {
 526         my @val = (git_get_project_config('avatar'));
 527
 528         return @val ? @val : @_;
 529 }
 530
 531 # checking HEAD file with -e is fragile if the repository was
 532 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 533 # and then pruned.
 534 sub check_head_link {
 535         my ($dir) = @_;
 536         my $headfile = "$dir/HEAD";
 537         return ((-e $headfile) ||
 538                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 539 }
 540
 541 sub check_export_ok {
 542         my ($dir) = @_;
 543         return (check_head_link($dir) &&
 544                 (!$export_ok || -e "$dir/$export_ok") &&
 545                 (!$export_auth_hook || $export_auth_hook->($dir)));
 546 }
 547
 548 # process alternate names for backward compatibility
 549 # filter out unsupported (unknown) snapshot formats
 550 sub filter_snapshot_fmts {
 551         my @fmts = @_;
 552
 553         @fmts = map {
 554                 exists $known_snapshot_format_aliases{$_} ?
 555                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 556         @fmts = grep {
 557                 exists $known_snapshot_formats{$_} &&
 558                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 559 }
 560
 561 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 562 sub evaluate_gitweb_config {
 563         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 564         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 565         # die if there are errors parsing config file
 566         if (-e $GITWEB_CONFIG) {
 567                 do $GITWEB_CONFIG;
 568                 die $@ if $@;
 569         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 570                 do $GITWEB_CONFIG_SYSTEM;
 571                 die $@ if $@;
 572         }
 573 }
 574
 575 # Get loadavg of system, to compare against $maxload.
 576 # Currently it requires '/proc/loadavg' present to get loadavg;
 577 # if it is not present it returns 0, which means no load checking.
 578 sub get_loadavg {
 579         if( -e '/proc/loadavg' ){
 580                 open my $fd, '<', '/proc/loadavg'
 581                         or return 0;
 582                 my @load = split(/\s+/, scalar <$fd>);
 583                 close $fd;
 584
 585                 # The first three columns measure CPU and IO utilization of the last one,
 586                 # five, and 10 minute periods.  The fourth column shows the number of
 587                 # currently running processes and the total number of processes in the m/n
 588                 # format.  The last column displays the last process ID used.
 589                 return $load[0] || 0;
 590         }
 591         # additional checks for load average should go here for things that don't export
 592         # /proc/loadavg
 593
 594         return 0;
 595 }
 596
 597 # version of the core git binary
 598 our $git_version;
 599 sub evaluate_git_version {
 600         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 601         $number_of_git_cmds++;
 602 }
 603
 604 sub check_loadavg {
 605         if (defined $maxload && get_loadavg() > $maxload) {
 606                 die_error(503, "The load average on the server is too high");
 607         }
 608 }
 609
 610 # ======================================================================
 611 # input validation and dispatch
 612
 613 # input parameters can be collected from a variety of sources (presently, CGI
 614 # and PATH_INFO), so we define an %input_params hash that collects them all
 615 # together during validation: this allows subsequent uses (e.g. href()) to be
 616 # agnostic of the parameter origin
 617
 618 our %input_params = ();
 619
 620 # input parameters are stored with the long parameter name as key. This will
 621 # also be used in the href subroutine to convert parameters to their CGI
 622 # equivalent, and since the href() usage is the most frequent one, we store
 623 # the name -> CGI key mapping here, instead of the reverse.
 624 #
 625 # XXX: Warning: If you touch this, check the search form for updating,
 626 # too.
 627
 628 our @cgi_param_mapping = (
 629         project => "p",
 630         action => "a",
 631         file_name => "f",
 632         file_parent => "fp",
 633         hash => "h",
 634         hash_parent => "hp",
 635         hash_base => "hb",
 636         hash_parent_base => "hpb",
 637         page => "pg",
 638         order => "o",
 639         searchtext => "s",
 640         searchtype => "st",
 641         snapshot_format => "sf",
 642         extra_options => "opt",
 643         search_use_regexp => "sr",
 644         # this must be last entry (for manipulation from JavaScript)
 645         javascript => "js"
 646 );
 647 our %cgi_param_mapping = @cgi_param_mapping;
 648
 649 # we will also need to know the possible actions, for validation
 650 our %actions = (
 651         "blame" => \&git_blame,
 652         "blame_incremental" => \&git_blame_incremental,
 653         "blame_data" => \&git_blame_data,
 654         "blobdiff" => \&git_blobdiff,
 655         "blobdiff_plain" => \&git_blobdiff_plain,
 656         "blob" => \&git_blob,
 657         "blob_plain" => \&git_blob_plain,
 658         "commitdiff" => \&git_commitdiff,
 659         "commitdiff_plain" => \&git_commitdiff_plain,
 660         "commit" => \&git_commit,
 661         "forks" => \&git_forks,
 662         "heads" => \&git_heads,
 663         "history" => \&git_history,
 664         "log" => \&git_log,
 665         "patch" => \&git_patch,
 666         "patches" => \&git_patches,
 667         "rss" => \&git_rss,
 668         "atom" => \&git_atom,
 669         "search" => \&git_search,
 670         "search_help" => \&git_search_help,
 671         "shortlog" => \&git_shortlog,
 672         "summary" => \&git_summary,
 673         "tag" => \&git_tag,
 674         "tags" => \&git_tags,
 675         "tree" => \&git_tree,
 676         "snapshot" => \&git_snapshot,
 677         "object" => \&git_object,
 678         # those below don't need $project
 679         "opml" => \&git_opml,
 680         "project_list" => \&git_project_list,
 681         "project_index" => \&git_project_index,
 682 );
 683
 684 # finally, we have the hash of allowed extra_options for the commands that
 685 # allow them
 686 our %allowed_options = (
 687         "--no-merges" => [ qw(rss atom log shortlog history) ],
 688 );
 689
 690 # fill %input_params with the CGI parameters. All values except for 'opt'
 691 # should be single values, but opt can be an array. We should probably
 692 # build an array of parameters that can be multi-valued, but since for the time
 693 # being it's only this one, we just single it out
 694 sub evaluate_query_params {
 695         our $cgi;
 696
 697         while (my ($name, $symbol) = each %cgi_param_mapping) {
 698                 if ($symbol eq 'opt') {
 699                         $input_params{$name} = [ $cgi->param($symbol) ];
 700                 } else {
 701                         $input_params{$name} = $cgi->param($symbol);
 702                 }
 703         }
 704 }
 705
 706 # now read PATH_INFO and update the parameter list for missing parameters
 707 sub evaluate_path_info {
 708         return if defined $input_params{'project'};
 709         return if !$path_info;
 710         $path_info =~ s,^/+,,;
 711         return if !$path_info;
 712
 713         # find which part of PATH_INFO is project
 714         my $project = $path_info;
 715         $project =~ s,/+$,,;
 716         while ($project && !check_head_link("$projectroot/$project")) {
 717                 $project =~ s,/*[^/]*$,,;
 718         }
 719         return unless $project;
 720         $input_params{'project'} = $project;
 721
 722         # do not change any parameters if an action is given using the query string
 723         return if $input_params{'action'};
 724         $path_info =~ s,^\Q$project\E/*,,;
 725
 726         # next, check if we have an action
 727         my $action = $path_info;
 728         $action =~ s,/.*$,,;
 729         if (exists $actions{$action}) {
 730                 $path_info =~ s,^$action/*,,;
 731                 $input_params{'action'} = $action;
 732         }
 733
 734         # list of actions that want hash_base instead of hash, but can have no
 735         # pathname (f) parameter
 736         my @wants_base = (
 737                 'tree',
 738                 'history',
 739         );
 740
 741         # we want to catch
 742         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 743         my ($parentrefname, $parentpathname, $refname, $pathname) =
 744                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 745
 746         # first, analyze the 'current' part
 747         if (defined $pathname) {
 748                 # we got "branch:filename" or "branch:dir/"
 749                 # we could use git_get_type(branch:pathname), but:
 750                 # - it needs $git_dir
 751                 # - it does a git() call
 752                 # - the convention of terminating directories with a slash
 753                 #   makes it superfluous
 754                 # - embedding the action in the PATH_INFO would make it even
 755                 #   more superfluous
 756                 $pathname =~ s,^/+,,;
 757                 if (!$pathname || substr($pathname, -1) eq "/") {
 758                         $input_params{'action'} ||= "tree";
 759                         $pathname =~ s,/$,,;
 760                 } else {
 761                         # the default action depends on whether we had parent info
 762                         # or not
 763                         if ($parentrefname) {
 764                                 $input_params{'action'} ||= "blobdiff_plain";
 765                         } else {
 766                                 $input_params{'action'} ||= "blob_plain";
 767                         }
 768                 }
 769                 $input_params{'hash_base'} ||= $refname;
 770                 $input_params{'file_name'} ||= $pathname;
 771         } elsif (defined $refname) {
 772                 # we got "branch". In this case we have to choose if we have to
 773                 # set hash or hash_base.
 774                 #
 775                 # Most of the actions without a pathname only want hash to be
 776                 # set, except for the ones specified in @wants_base that want
 777                 # hash_base instead. It should also be noted that hand-crafted
 778                 # links having 'history' as an action and no pathname or hash
 779                 # set will fail, but that happens regardless of PATH_INFO.
 780                 $input_params{'action'} ||= "shortlog";
 781                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 782                         $input_params{'hash_base'} ||= $refname;
 783                 } else {
 784                         $input_params{'hash'} ||= $refname;
 785                 }
 786         }
 787
 788         # next, handle the 'parent' part, if present
 789         if (defined $parentrefname) {
 790                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 791                 # someproject/blobdiff/oldrev..newrev:/filename
 792                 if ($parentpathname) {
 793                         $parentpathname =~ s,^/+,,;
 794                         $parentpathname =~ s,/$,,;
 795                         $input_params{'file_parent'} ||= $parentpathname;
 796                 } else {
 797                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 798                 }
 799                 # we assume that hash_parent_base is wanted if a path was specified,
 800                 # or if the action wants hash_base instead of hash
 801                 if (defined $input_params{'file_parent'} ||
 802                         grep { $_ eq $input_params{'action'} } @wants_base) {
 803                         $input_params{'hash_parent_base'} ||= $parentrefname;
 804                 } else {
 805                         $input_params{'hash_parent'} ||= $parentrefname;
 806                 }
 807         }
 808
 809         # for the snapshot action, we allow URLs in the form
 810         # $project/snapshot/$hash.ext
 811         # where .ext determines the snapshot and gets removed from the
 812         # passed $refname to provide the $hash.
 813         #
 814         # To be able to tell that $refname includes the format extension, we
 815         # require the following two conditions to be satisfied:
 816         # - the hash input parameter MUST have been set from the $refname part
 817         #   of the URL (i.e. they must be equal)
 818         # - the snapshot format MUST NOT have been defined already (e.g. from
 819         #   CGI parameter sf)
 820         # It's also useless to try any matching unless $refname has a dot,
 821         # so we check for that too
 822         if (defined $input_params{'action'} &&
 823                 $input_params{'action'} eq 'snapshot' &&
 824                 defined $refname && index($refname, '.') != -1 &&
 825                 $refname eq $input_params{'hash'} &&
 826                 !defined $input_params{'snapshot_format'}) {
 827                 # We loop over the known snapshot formats, checking for
 828                 # extensions. Allowed extensions are both the defined suffix
 829                 # (which includes the initial dot already) and the snapshot
 830                 # format key itself, with a prepended dot
 831                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 832                         my $hash = $refname;
 833                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 834                                 next;
 835                         }
 836                         my $sfx = $1;
 837                         # a valid suffix was found, so set the snapshot format
 838                         # and reset the hash parameter
 839                         $input_params{'snapshot_format'} = $fmt;
 840                         $input_params{'hash'} = $hash;
 841                         # we also set the format suffix to the one requested
 842                         # in the URL: this way a request for e.g. .tgz returns
 843                         # a .tgz instead of a .tar.gz
 844                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 845                         last;
 846                 }
 847         }
 848 }
 849
 850 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 851      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 852      $searchtext, $search_regexp);
 853 sub evaluate_and_validate_params {
 854         our $action = $input_params{'action'};
 855         if (defined $action) {
 856                 if (!validate_action($action)) {
 857                         die_error(400, "Invalid action parameter");
 858                 }
 859         }
 860
 861         # parameters which are pathnames
 862         our $project = $input_params{'project'};
 863         if (defined $project) {
 864                 if (!validate_project($project)) {
 865                         undef $project;
 866                         die_error(404, "No such project");
 867                 }
 868         }
 869
 870         our $file_name = $input_params{'file_name'};
 871         if (defined $file_name) {
 872                 if (!validate_pathname($file_name)) {
 873                         die_error(400, "Invalid file parameter");
 874                 }
 875         }
 876
 877         our $file_parent = $input_params{'file_parent'};
 878         if (defined $file_parent) {
 879                 if (!validate_pathname($file_parent)) {
 880                         die_error(400, "Invalid file parent parameter");
 881                 }
 882         }
 883
 884         # parameters which are refnames
 885         our $hash = $input_params{'hash'};
 886         if (defined $hash) {
 887                 if (!validate_refname($hash)) {
 888                         die_error(400, "Invalid hash parameter");
 889                 }
 890         }
 891
 892         our $hash_parent = $input_params{'hash_parent'};
 893         if (defined $hash_parent) {
 894                 if (!validate_refname($hash_parent)) {
 895                         die_error(400, "Invalid hash parent parameter");
 896                 }
 897         }
 898
 899         our $hash_base = $input_params{'hash_base'};
 900         if (defined $hash_base) {
 901                 if (!validate_refname($hash_base)) {
 902                         die_error(400, "Invalid hash base parameter");
 903                 }
 904         }
 905
 906         our @extra_options = @{$input_params{'extra_options'}};
 907         # @extra_options is always defined, since it can only be (currently) set from
 908         # CGI, and $cgi->param() returns the empty array in array context if the param
 909         # is not set
 910         foreach my $opt (@extra_options) {
 911                 if (not exists $allowed_options{$opt}) {
 912                         die_error(400, "Invalid option parameter");
 913                 }
 914                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 915                         die_error(400, "Invalid option parameter for this action");
 916                 }
 917         }
 918
 919         our $hash_parent_base = $input_params{'hash_parent_base'};
 920         if (defined $hash_parent_base) {
 921                 if (!validate_refname($hash_parent_base)) {
 922                         die_error(400, "Invalid hash parent base parameter");
 923                 }
 924         }
 925
 926         # other parameters
 927         our $page = $input_params{'page'};
 928         if (defined $page) {
 929                 if ($page =~ m/[^0-9]/) {
 930                         die_error(400, "Invalid page parameter");
 931                 }
 932         }
 933
 934         our $searchtype = $input_params{'searchtype'};
 935         if (defined $searchtype) {
 936                 if ($searchtype =~ m/[^a-z]/) {
 937                         die_error(400, "Invalid searchtype parameter");
 938                 }
 939         }
 940
 941         our $search_use_regexp = $input_params{'search_use_regexp'};
 942
 943         our $searchtext = $input_params{'searchtext'};
 944         our $search_regexp;
 945         if (defined $searchtext) {
 946                 if (length($searchtext) < 2) {
 947                         die_error(403, "At least two characters are required for search parameter");
 948                 }
 949                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 950         }
 951 }
 952
 953 # path to the current git repository
 954 our $git_dir;
 955 sub evaluate_git_dir {
 956         our $git_dir = "$projectroot/$project" if $project;
 957 }
 958
 959 our (@snapshot_fmts, $git_avatar);
 960 sub configure_gitweb_features {
 961         # list of supported snapshot formats
 962         our @snapshot_fmts = gitweb_get_feature('snapshot');
 963         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 964
 965         # check that the avatar feature is set to a known provider name,
 966         # and for each provider check if the dependencies are satisfied.
 967         # if the provider name is invalid or the dependencies are not met,
 968         # reset $git_avatar to the empty string.
 969         our ($git_avatar) = gitweb_get_feature('avatar');
 970         if ($git_avatar eq 'gravatar') {
 971                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 972         } elsif ($git_avatar eq 'picon') {
 973                 # no dependencies
 974         } else {
 975                 $git_avatar = '';
 976         }
 977 }
 978
 979 # custom error handler: 'die <message>' is Internal Server Error
 980 sub handle_errors_html {
 981         my $msg = shift; # it is already HTML escaped
 982
 983         # to avoid infinite loop where error occurs in die_error,
 984         # change handler to default handler, disabling handle_errors_html
 985         set_message("Error occured when inside die_error:\n$msg");
 986
 987         # you cannot jump out of die_error when called as error handler;
 988         # the subroutine set via CGI::Carp::set_message is called _after_
 989         # HTTP headers are already written, so it cannot write them itself
 990         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
 991 }
 992 set_message(\&handle_errors_html);
 993
 994 # dispatch
 995 sub dispatch {
 996         if (!defined $action) {
 997                 if (defined $hash) {
 998                         $action = git_get_type($hash);
 999                 } elsif (defined $hash_base && defined $file_name) {
1000                         $action = git_get_type("$hash_base:$file_name");
1001                 } elsif (defined $project) {
1002                         $action = 'summary';
1003                 } else {
1004                         $action = 'project_list';
1005                 }
1006         }
1007         if (!defined($actions{$action})) {
1008                 die_error(400, "Unknown action");
1009         }
1010         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1011             !$project) {
1012                 die_error(400, "Project needed");
1013         }
1014         $actions{$action}->();
1015 }
1016
1017 sub run_request {
1018         our $t0 = [Time::HiRes::gettimeofday()]
1019                 if defined $t0;
1020
1021         evaluate_uri();
1022         evaluate_gitweb_config();
1023         evaluate_git_version();
1024         check_loadavg();
1025
1026         # $projectroot and $projects_list might be set in gitweb config file
1027         $projects_list ||= $projectroot;
1028
1029         evaluate_query_params();
1030         evaluate_path_info();
1031         evaluate_and_validate_params();
1032         evaluate_git_dir();
1033
1034         configure_gitweb_features();
1035
1036         dispatch();
1037 }
1038
1039 our $is_last_request = sub { 1 };
1040 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1041 our $CGI = 'CGI';
1042 our $cgi;
1043 sub evaluate_argv {
1044         return unless (@ARGV);
1045
1046         require Getopt::Long;
1047         Getopt::Long::GetOptions(
1048                 'fastcgi|fcgi|f' => sub {
1049                         require CGI::Fast;
1050                         our $CGI = 'CGI::Fast';
1051
1052                         my $request_number = 0;
1053                         # let each child service 100 requests
1054                         our $is_last_request = sub { ++$request_number > 100 };
1055                 },
1056                 'nproc|n=i' => sub {
1057                         my ($arg, $val) = @_;
1058                         return unless eval { require FCGI::ProcManager; 1; };
1059                         my $proc_manager = FCGI::ProcManager->new({
1060                                 n_processes => $val,
1061                         });
1062                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1063                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1064                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1065                 },
1066         );
1067 }
1068
1069 sub run {
1070         evaluate_argv();
1071
1072         $pre_listen_hook->()
1073                 if $pre_listen_hook;
1074
1075  REQUEST:
1076         while ($cgi = $CGI->new()) {
1077                 $pre_dispatch_hook->()
1078                         if $pre_dispatch_hook;
1079
1080                 run_request();
1081
1082                 $pre_dispatch_hook->()
1083                         if $post_dispatch_hook;
1084
1085                 last REQUEST if ($is_last_request->());
1086         }
1087
1088  DONE_GITWEB:
1089         1;
1090 }
1091
1092 run();
1093
1094 ## ======================================================================
1095 ## action links
1096
1097 # possible values of extra options
1098 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1099 # -replay => 1      - start from a current view (replay with modifications)
1100 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1101 sub href {
1102         my %params = @_;
1103         # default is to use -absolute url() i.e. $my_uri
1104         my $href = $params{-full} ? $my_url : $my_uri;
1105
1106         $params{'project'} = $project unless exists $params{'project'};
1107
1108         if ($params{-replay}) {
1109                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1110                         if (!exists $params{$name}) {
1111                                 $params{$name} = $input_params{$name};
1112                         }
1113                 }
1114         }
1115
1116         my $use_pathinfo = gitweb_check_feature('pathinfo');
1117         if (defined $params{'project'} &&
1118             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1119                 # try to put as many parameters as possible in PATH_INFO:
1120                 #   - project name
1121                 #   - action
1122                 #   - hash_parent or hash_parent_base:/file_parent
1123                 #   - hash or hash_base:/filename
1124                 #   - the snapshot_format as an appropriate suffix
1125
1126                 # When the script is the root DirectoryIndex for the domain,
1127                 # $href here would be something like http://gitweb.example.com/
1128                 # Thus, we strip any trailing / from $href, to spare us double
1129                 # slashes in the final URL
1130                 $href =~ s,/$,,;
1131
1132                 # Then add the project name, if present
1133                 $href .= "/".esc_url($params{'project'});
1134                 delete $params{'project'};
1135
1136                 # since we destructively absorb parameters, we keep this
1137                 # boolean that remembers if we're handling a snapshot
1138                 my $is_snapshot = $params{'action'} eq 'snapshot';
1139
1140                 # Summary just uses the project path URL, any other action is
1141                 # added to the URL
1142                 if (defined $params{'action'}) {
1143                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1144                         delete $params{'action'};
1145                 }
1146
1147                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1148                 # stripping nonexistent or useless pieces
1149                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1150                         || $params{'hash_parent'} || $params{'hash'});
1151                 if (defined $params{'hash_base'}) {
1152                         if (defined $params{'hash_parent_base'}) {
1153                                 $href .= esc_url($params{'hash_parent_base'});
1154                                 # skip the file_parent if it's the same as the file_name
1155                                 if (defined $params{'file_parent'}) {
1156                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1157                                                 delete $params{'file_parent'};
1158                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1159                                                 $href .= ":/".esc_url($params{'file_parent'});
1160                                                 delete $params{'file_parent'};
1161                                         }
1162                                 }
1163                                 $href .= "..";
1164                                 delete $params{'hash_parent'};
1165                                 delete $params{'hash_parent_base'};
1166                         } elsif (defined $params{'hash_parent'}) {
1167                                 $href .= esc_url($params{'hash_parent'}). "..";
1168                                 delete $params{'hash_parent'};
1169                         }
1170
1171                         $href .= esc_url($params{'hash_base'});
1172                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1173                                 $href .= ":/".esc_url($params{'file_name'});
1174                                 delete $params{'file_name'};
1175                         }
1176                         delete $params{'hash'};
1177                         delete $params{'hash_base'};
1178                 } elsif (defined $params{'hash'}) {
1179                         $href .= esc_url($params{'hash'});
1180                         delete $params{'hash'};
1181                 }
1182
1183                 # If the action was a snapshot, we can absorb the
1184                 # snapshot_format parameter too
1185                 if ($is_snapshot) {
1186                         my $fmt = $params{'snapshot_format'};
1187                         # snapshot_format should always be defined when href()
1188                         # is called, but just in case some code forgets, we
1189                         # fall back to the default
1190                         $fmt ||= $snapshot_fmts[0];
1191                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1192                         delete $params{'snapshot_format'};
1193                 }
1194         }
1195
1196         # now encode the parameters explicitly
1197         my @result = ();
1198         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1199                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1200                 if (defined $params{$name}) {
1201                         if (ref($params{$name}) eq "ARRAY") {
1202                                 foreach my $par (@{$params{$name}}) {
1203                                         push @result, $symbol . "=" . esc_param($par);
1204                                 }
1205                         } else {
1206                                 push @result, $symbol . "=" . esc_param($params{$name});
1207                         }
1208                 }
1209         }
1210         $href .= "?" . join(';', @result) if scalar @result;
1211
1212         return $href;
1213 }
1214
1215
1216 ## ======================================================================
1217 ## validation, quoting/unquoting and escaping
1218
1219 sub validate_action {
1220         my $input = shift || return undef;
1221         return undef unless exists $actions{$input};
1222         return $input;
1223 }
1224
1225 sub validate_project {
1226         my $input = shift || return undef;
1227         if (!validate_pathname($input) ||
1228                 !(-d "$projectroot/$input") ||
1229                 !check_export_ok("$projectroot/$input") ||
1230                 ($strict_export && !project_in_list($input))) {
1231                 return undef;
1232         } else {
1233                 return $input;
1234         }
1235 }
1236
1237 sub validate_pathname {
1238         my $input = shift || return undef;
1239
1240         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1241         # at the beginning, at the end, and between slashes.
1242         # also this catches doubled slashes
1243         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1244                 return undef;
1245         }
1246         # no null characters
1247         if ($input =~ m!\0!) {
1248                 return undef;
1249         }
1250         return $input;
1251 }
1252
1253 sub validate_refname {
1254         my $input = shift || return undef;
1255
1256         # textual hashes are O.K.
1257         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1258                 return $input;
1259         }
1260         # it must be correct pathname
1261         $input = validate_pathname($input)
1262                 or return undef;
1263         # restrictions on ref name according to git-check-ref-format
1264         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1265                 return undef;
1266         }
1267         return $input;
1268 }
1269
1270 # decode sequences of octets in utf8 into Perl's internal form,
1271 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1272 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1273 sub to_utf8 {
1274         my $str = shift;
1275         return undef unless defined $str;
1276         if (utf8::valid($str)) {
1277                 utf8::decode($str);
1278                 return $str;
1279         } else {
1280                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1281         }
1282 }
1283
1284 # quote unsafe chars, but keep the slash, even when it's not
1285 # correct, but quoted slashes look too horrible in bookmarks
1286 sub esc_param {
1287         my $str = shift;
1288         return undef unless defined $str;
1289         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1290         $str =~ s/ /\+/g;
1291         return $str;
1292 }
1293
1294 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1295 sub esc_url {
1296         my $str = shift;
1297         return undef unless defined $str;
1298         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1299         $str =~ s/\+/%2B/g;
1300         $str =~ s/ /\+/g;
1301         return $str;
1302 }
1303
1304 # replace invalid utf8 character with SUBSTITUTION sequence
1305 sub esc_html {
1306         my $str = shift;
1307         my %opts = @_;
1308
1309         return undef unless defined $str;
1310
1311         $str = to_utf8($str);
1312         $str = $cgi->escapeHTML($str);
1313         if ($opts{'-nbsp'}) {
1314                 $str =~ s/ /&nbsp;/g;
1315         }
1316         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1317         return $str;
1318 }
1319
1320 # quote control characters and escape filename to HTML
1321 sub esc_path {
1322         my $str = shift;
1323         my %opts = @_;
1324
1325         return undef unless defined $str;
1326
1327         $str = to_utf8($str);
1328         $str = $cgi->escapeHTML($str);
1329         if ($opts{'-nbsp'}) {
1330                 $str =~ s/ /&nbsp;/g;
1331         }
1332         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1333         return $str;
1334 }
1335
1336 # Make control characters "printable", using character escape codes (CEC)
1337 sub quot_cec {
1338         my $cntrl = shift;
1339         my %opts = @_;
1340         my %es = ( # character escape codes, aka escape sequences
1341                 "\t" => '\t',   # tab            (HT)
1342                 "\n" => '\n',   # line feed      (LF)
1343                 "\r" => '\r',   # carrige return (CR)
1344                 "\f" => '\f',   # form feed      (FF)
1345                 "\b" => '\b',   # backspace      (BS)
1346                 "\a" => '\a',   # alarm (bell)   (BEL)
1347                 "\e" => '\e',   # escape         (ESC)
1348                 "\013" => '\v', # vertical tab   (VT)
1349                 "\000" => '\0', # nul character  (NUL)
1350         );
1351         my $chr = ( (exists $es{$cntrl})
1352                     ? $es{$cntrl}
1353                     : sprintf('\%2x', ord($cntrl)) );
1354         if ($opts{-nohtml}) {
1355                 return $chr;
1356         } else {
1357                 return "<span class=\"cntrl\">$chr</span>";
1358         }
1359 }
1360
1361 # Alternatively use unicode control pictures codepoints,
1362 # Unicode "printable representation" (PR)
1363 sub quot_upr {
1364         my $cntrl = shift;
1365         my %opts = @_;
1366
1367         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1368         if ($opts{-nohtml}) {
1369                 return $chr;
1370         } else {
1371                 return "<span class=\"cntrl\">$chr</span>";
1372         }
1373 }
1374
1375 # git may return quoted and escaped filenames
1376 sub unquote {
1377         my $str = shift;
1378
1379         sub unq {
1380                 my $seq = shift;
1381                 my %es = ( # character escape codes, aka escape sequences
1382                         't' => "\t",   # tab            (HT, TAB)
1383                         'n' => "\n",   # newline        (NL)
1384                         'r' => "\r",   # return         (CR)
1385                         'f' => "\f",   # form feed      (FF)
1386                         'b' => "\b",   # backspace      (BS)
1387                         'a' => "\a",   # alarm (bell)   (BEL)
1388                         'e' => "\e",   # escape         (ESC)
1389                         'v' => "\013", # vertical tab   (VT)
1390                 );
1391
1392                 if ($seq =~ m/^[0-7]{1,3}$/) {
1393                         # octal char sequence
1394                         return chr(oct($seq));
1395                 } elsif (exists $es{$seq}) {
1396                         # C escape sequence, aka character escape code
1397                         return $es{$seq};
1398                 }
1399                 # quoted ordinary character
1400                 return $seq;
1401         }
1402
1403         if ($str =~ m/^"(.*)"$/) {
1404                 # needs unquoting
1405                 $str = $1;
1406                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1407         }
1408         return $str;
1409 }
1410
1411 # escape tabs (convert tabs to spaces)
1412 sub untabify {
1413         my $line = shift;
1414
1415         while ((my $pos = index($line, "\t")) != -1) {
1416                 if (my $count = (8 - ($pos % 8))) {
1417                         my $spaces = ' ' x $count;
1418                         $line =~ s/\t/$spaces/;
1419                 }
1420         }
1421
1422         return $line;
1423 }
1424
1425 sub project_in_list {
1426         my $project = shift;
1427         my @list = git_get_projects_list();
1428         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1429 }
1430
1431 ## ----------------------------------------------------------------------
1432 ## HTML aware string manipulation
1433
1434 # Try to chop given string on a word boundary between position
1435 # $len and $len+$add_len. If there is no word boundary there,
1436 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1437 # (marking chopped part) would be longer than given string.
1438 sub chop_str {
1439         my $str = shift;
1440         my $len = shift;
1441         my $add_len = shift || 10;
1442         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1443
1444         # Make sure perl knows it is utf8 encoded so we don't
1445         # cut in the middle of a utf8 multibyte char.
1446         $str = to_utf8($str);
1447
1448         # allow only $len chars, but don't cut a word if it would fit in $add_len
1449         # if it doesn't fit, cut it if it's still longer than the dots we would add
1450         # remove chopped character entities entirely
1451
1452         # when chopping in the middle, distribute $len into left and right part
1453         # return early if chopping wouldn't make string shorter
1454         if ($where eq 'center') {
1455                 return $str if ($len + 5 >= length($str)); # filler is length 5
1456                 $len = int($len/2);
1457         } else {
1458                 return $str if ($len + 4 >= length($str)); # filler is length 4
1459         }
1460
1461         # regexps: ending and beginning with word part up to $add_len
1462         my $endre = qr/.{$len}\w{0,$add_len}/;
1463         my $begre = qr/\w{0,$add_len}.{$len}/;
1464
1465         if ($where eq 'left') {
1466                 $str =~ m/^(.*?)($begre)$/;
1467                 my ($lead, $body) = ($1, $2);
1468                 if (length($lead) > 4) {
1469                         $lead = " ...";
1470                 }
1471                 return "$lead$body";
1472
1473         } elsif ($where eq 'center') {
1474                 $str =~ m/^($endre)(.*)$/;
1475                 my ($left, $str)  = ($1, $2);
1476                 $str =~ m/^(.*?)($begre)$/;
1477                 my ($mid, $right) = ($1, $2);
1478                 if (length($mid) > 5) {
1479                         $mid = " ... ";
1480                 }
1481                 return "$left$mid$right";
1482
1483         } else {
1484                 $str =~ m/^($endre)(.*)$/;
1485                 my $body = $1;
1486                 my $tail = $2;
1487                 if (length($tail) > 4) {
1488                         $tail = "... ";
1489                 }
1490                 return "$body$tail";
1491         }
1492 }
1493
1494 # takes the same arguments as chop_str, but also wraps a <span> around the
1495 # result with a title attribute if it does get chopped. Additionally, the
1496 # string is HTML-escaped.
1497 sub chop_and_escape_str {
1498         my ($str) = @_;
1499
1500         my $chopped = chop_str(@_);
1501         if ($chopped eq $str) {
1502                 return esc_html($chopped);
1503         } else {
1504                 $str =~ s/[[:cntrl:]]/?/g;
1505                 return $cgi->span({-title=>$str}, esc_html($chopped));
1506         }
1507 }
1508
1509 ## ----------------------------------------------------------------------
1510 ## functions returning short strings
1511
1512 # CSS class for given age value (in seconds)
1513 sub age_class {
1514         my $age = shift;
1515
1516         if (!defined $age) {
1517                 return "noage";
1518         } elsif ($age < 60*60*2) {
1519                 return "age0";
1520         } elsif ($age < 60*60*24*2) {
1521                 return "age1";
1522         } else {
1523                 return "age2";
1524         }
1525 }
1526
1527 # convert age in seconds to "nn units ago" string
1528 sub age_string {
1529         my $age = shift;
1530         my $age_str;
1531
1532         if ($age > 60*60*24*365*2) {
1533                 $age_str = (int $age/60/60/24/365);
1534                 $age_str .= " years ago";
1535         } elsif ($age > 60*60*24*(365/12)*2) {
1536                 $age_str = int $age/60/60/24/(365/12);
1537                 $age_str .= " months ago";
1538         } elsif ($age > 60*60*24*7*2) {
1539                 $age_str = int $age/60/60/24/7;
1540                 $age_str .= " weeks ago";
1541         } elsif ($age > 60*60*24*2) {
1542                 $age_str = int $age/60/60/24;
1543                 $age_str .= " days ago";
1544         } elsif ($age > 60*60*2) {
1545                 $age_str = int $age/60/60;
1546                 $age_str .= " hours ago";
1547         } elsif ($age > 60*2) {
1548                 $age_str = int $age/60;
1549                 $age_str .= " min ago";
1550         } elsif ($age > 2) {
1551                 $age_str = int $age;
1552                 $age_str .= " sec ago";
1553         } else {
1554                 $age_str .= " right now";
1555         }
1556         return $age_str;
1557 }
1558
1559 use constant {
1560         S_IFINVALID => 0030000,
1561         S_IFGITLINK => 0160000,
1562 };
1563
1564 # submodule/subproject, a commit object reference
1565 sub S_ISGITLINK {
1566         my $mode = shift;
1567
1568         return (($mode & S_IFMT) == S_IFGITLINK)
1569 }
1570
1571 # convert file mode in octal to symbolic file mode string
1572 sub mode_str {
1573         my $mode = oct shift;
1574
1575         if (S_ISGITLINK($mode)) {
1576                 return 'm---------';
1577         } elsif (S_ISDIR($mode & S_IFMT)) {
1578                 return 'drwxr-xr-x';
1579         } elsif (S_ISLNK($mode)) {
1580                 return 'lrwxrwxrwx';
1581         } elsif (S_ISREG($mode)) {
1582                 # git cares only about the executable bit
1583                 if ($mode & S_IXUSR) {
1584                         return '-rwxr-xr-x';
1585                 } else {
1586                         return '-rw-r--r--';
1587                 };
1588         } else {
1589                 return '----------';
1590         }
1591 }
1592
1593 # convert file mode in octal to file type string
1594 sub file_type {
1595         my $mode = shift;
1596
1597         if ($mode !~ m/^[0-7]+$/) {
1598                 return $mode;
1599         } else {
1600                 $mode = oct $mode;
1601         }
1602
1603         if (S_ISGITLINK($mode)) {
1604                 return "submodule";
1605         } elsif (S_ISDIR($mode & S_IFMT)) {
1606                 return "directory";
1607         } elsif (S_ISLNK($mode)) {
1608                 return "symlink";
1609         } elsif (S_ISREG($mode)) {
1610                 return "file";
1611         } else {
1612                 return "unknown";
1613         }
1614 }
1615
1616 # convert file mode in octal to file type description string
1617 sub file_type_long {
1618         my $mode = shift;
1619
1620         if ($mode !~ m/^[0-7]+$/) {
1621                 return $mode;
1622         } else {
1623                 $mode = oct $mode;
1624         }
1625
1626         if (S_ISGITLINK($mode)) {
1627                 return "submodule";
1628         } elsif (S_ISDIR($mode & S_IFMT)) {
1629                 return "directory";
1630         } elsif (S_ISLNK($mode)) {
1631                 return "symlink";
1632         } elsif (S_ISREG($mode)) {
1633                 if ($mode & S_IXUSR) {
1634                         return "executable";
1635                 } else {
1636                         return "file";
1637                 };
1638         } else {
1639                 return "unknown";
1640         }
1641 }
1642
1643
1644 ## ----------------------------------------------------------------------
1645 ## functions returning short HTML fragments, or transforming HTML fragments
1646 ## which don't belong to other sections
1647
1648 # format line of commit message.
1649 sub format_log_line_html {
1650         my $line = shift;
1651
1652         $line = esc_html($line, -nbsp=>1);
1653         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1654                 $cgi->a({-href => href(action=>"object", hash=>$1),
1655                                         -class => "text"}, $1);
1656         }eg;
1657
1658         return $line;
1659 }
1660
1661 # format marker of refs pointing to given object
1662
1663 # the destination action is chosen based on object type and current context:
1664 # - for annotated tags, we choose the tag view unless it's the current view
1665 #   already, in which case we go to shortlog view
1666 # - for other refs, we keep the current view if we're in history, shortlog or
1667 #   log view, and select shortlog otherwise
1668 sub format_ref_marker {
1669         my ($refs, $id) = @_;
1670         my $markers = '';
1671
1672         if (defined $refs->{$id}) {
1673                 foreach my $ref (@{$refs->{$id}}) {
1674                         # this code exploits the fact that non-lightweight tags are the
1675                         # only indirect objects, and that they are the only objects for which
1676                         # we want to use tag instead of shortlog as action
1677                         my ($type, $name) = qw();
1678                         my $indirect = ($ref =~ s/\^\{\}$//);
1679                         # e.g. tags/v2.6.11 or heads/next
1680                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1681                                 $type = $1;
1682                                 $name = $2;
1683                         } else {
1684                                 $type = "ref";
1685                                 $name = $ref;
1686                         }
1687
1688                         my $class = $type;
1689                         $class .= " indirect" if $indirect;
1690
1691                         my $dest_action = "shortlog";
1692
1693                         if ($indirect) {
1694                                 $dest_action = "tag" unless $action eq "tag";
1695                         } elsif ($action =~ /^(history|(short)?log)$/) {
1696                                 $dest_action = $action;
1697                         }
1698
1699                         my $dest = "";
1700                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1701                         $dest .= $ref;
1702
1703                         my $link = $cgi->a({
1704                                 -href => href(
1705                                         action=>$dest_action,
1706                                         hash=>$dest
1707                                 )}, $name);
1708
1709                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1710                                 $link . "</span>";
1711                 }
1712         }
1713
1714         if ($markers) {
1715                 return ' <span class="refs">'. $markers . '</span>';
1716         } else {
1717                 return "";
1718         }
1719 }
1720
1721 # format, perhaps shortened and with markers, title line
1722 sub format_subject_html {
1723         my ($long, $short, $href, $extra) = @_;
1724         $extra = '' unless defined($extra);
1725
1726         if (length($short) < length($long)) {
1727                 $long =~ s/[[:cntrl:]]/?/g;
1728                 return $cgi->a({-href => $href, -class => "list subject",
1729                                 -title => to_utf8($long)},
1730                        esc_html($short)) . $extra;
1731         } else {
1732                 return $cgi->a({-href => $href, -class => "list subject"},
1733                        esc_html($long)) . $extra;
1734         }
1735 }
1736
1737 # Rather than recomputing the url for an email multiple times, we cache it
1738 # after the first hit. This gives a visible benefit in views where the avatar
1739 # for the same email is used repeatedly (e.g. shortlog).
1740 # The cache is shared by all avatar engines (currently gravatar only), which
1741 # are free to use it as preferred. Since only one avatar engine is used for any
1742 # given page, there's no risk for cache conflicts.
1743 our %avatar_cache = ();
1744
1745 # Compute the picon url for a given email, by using the picon search service over at
1746 # http://www.cs.indiana.edu/picons/search.html
1747 sub picon_url {
1748         my $email = lc shift;
1749         if (!$avatar_cache{$email}) {
1750                 my ($user, $domain) = split('@', $email);
1751                 $avatar_cache{$email} =
1752                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1753                         "$domain/$user/" .
1754                         "users+domains+unknown/up/single";
1755         }
1756         return $avatar_cache{$email};
1757 }
1758
1759 # Compute the gravatar url for a given email, if it's not in the cache already.
1760 # Gravatar stores only the part of the URL before the size, since that's the
1761 # one computationally more expensive. This also allows reuse of the cache for
1762 # different sizes (for this particular engine).
1763 sub gravatar_url {
1764         my $email = lc shift;
1765         my $size = shift;
1766         $avatar_cache{$email} ||=
1767                 "http://www.gravatar.com/avatar/" .
1768                         Digest::MD5::md5_hex($email) . "?s=";
1769         return $avatar_cache{$email} . $size;
1770 }
1771
1772 # Insert an avatar for the given $email at the given $size if the feature
1773 # is enabled.
1774 sub git_get_avatar {
1775         my ($email, %opts) = @_;
1776         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1777         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1778         $opts{-size} ||= 'default';
1779         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1780         my $url = "";
1781         if ($git_avatar eq 'gravatar') {
1782                 $url = gravatar_url($email, $size);
1783         } elsif ($git_avatar eq 'picon') {
1784                 $url = picon_url($email);
1785         }
1786         # Other providers can be added by extending the if chain, defining $url
1787         # as needed. If no variant puts something in $url, we assume avatars
1788         # are completely disabled/unavailable.
1789         if ($url) {
1790                 return $pre_white .
1791                        "<img width=\"$size\" " .
1792                             "class=\"avatar\" " .
1793                             "src=\"$url\" " .
1794                             "alt=\"\" " .
1795                        "/>" . $post_white;
1796         } else {
1797                 return "";
1798         }
1799 }
1800
1801 sub format_search_author {
1802         my ($author, $searchtype, $displaytext) = @_;
1803         my $have_search = gitweb_check_feature('search');
1804
1805         if ($have_search) {
1806                 my $performed = "";
1807                 if ($searchtype eq 'author') {
1808                         $performed = "authored";
1809                 } elsif ($searchtype eq 'committer') {
1810                         $performed = "committed";
1811                 }
1812
1813                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1814                                 searchtext=>$author,
1815                                 searchtype=>$searchtype), class=>"list",
1816                                 title=>"Search for commits $performed by $author"},
1817                                 $displaytext);
1818
1819         } else {
1820                 return $displaytext;
1821         }
1822 }
1823
1824 # format the author name of the given commit with the given tag
1825 # the author name is chopped and escaped according to the other
1826 # optional parameters (see chop_str).
1827 sub format_author_html {
1828         my $tag = shift;
1829         my $co = shift;
1830         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1831         return "<$tag class=\"author\">" .
1832                format_search_author($co->{'author_name'}, "author",
1833                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1834                        $author) .
1835                "</$tag>";
1836 }
1837
1838 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1839 sub format_git_diff_header_line {
1840         my $line = shift;
1841         my $diffinfo = shift;
1842         my ($from, $to) = @_;
1843
1844         if ($diffinfo->{'nparents'}) {
1845                 # combined diff
1846                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1847                 if ($to->{'href'}) {
1848                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1849                                          esc_path($to->{'file'}));
1850                 } else { # file was deleted (no href)
1851                         $line .= esc_path($to->{'file'});
1852                 }
1853         } else {
1854                 # "ordinary" diff
1855                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1856                 if ($from->{'href'}) {
1857                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1858                                          'a/' . esc_path($from->{'file'}));
1859                 } else { # file was added (no href)
1860                         $line .= 'a/' . esc_path($from->{'file'});
1861                 }
1862                 $line .= ' ';
1863                 if ($to->{'href'}) {
1864                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1865                                          'b/' . esc_path($to->{'file'}));
1866                 } else { # file was deleted
1867                         $line .= 'b/' . esc_path($to->{'file'});
1868                 }
1869         }
1870
1871         return "<div class=\"diff header\">$line</div>\n";
1872 }
1873
1874 # format extended diff header line, before patch itself
1875 sub format_extended_diff_header_line {
1876         my $line = shift;
1877         my $diffinfo = shift;
1878         my ($from, $to) = @_;
1879
1880         # match <path>
1881         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1882                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1883                                        esc_path($from->{'file'}));
1884         }
1885         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1886                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1887                                  esc_path($to->{'file'}));
1888         }
1889         # match single <mode>
1890         if ($line =~ m/\s(\d{6})$/) {
1891                 $line .= '<span class="info"> (' .
1892                          file_type_long($1) .
1893                          ')</span>';
1894         }
1895         # match <hash>
1896         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1897                 # can match only for combined diff
1898                 $line = 'index ';
1899                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1900                         if ($from->{'href'}[$i]) {
1901                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1902                                                   -class=>"hash"},
1903                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1904                         } else {
1905                                 $line .= '0' x 7;
1906                         }
1907                         # separator
1908                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1909                 }
1910                 $line .= '..';
1911                 if ($to->{'href'}) {
1912                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1913                                          substr($diffinfo->{'to_id'},0,7));
1914                 } else {
1915                         $line .= '0' x 7;
1916                 }
1917
1918         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1919                 # can match only for ordinary diff
1920                 my ($from_link, $to_link);
1921                 if ($from->{'href'}) {
1922                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1923                                              substr($diffinfo->{'from_id'},0,7));
1924                 } else {
1925                         $from_link = '0' x 7;
1926                 }
1927                 if ($to->{'href'}) {
1928                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1929                                            substr($diffinfo->{'to_id'},0,7));
1930                 } else {
1931                         $to_link = '0' x 7;
1932                 }
1933                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1934                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1935         }
1936
1937         return $line . "<br/>\n";
1938 }
1939
1940 # format from-file/to-file diff header
1941 sub format_diff_from_to_header {
1942         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1943         my $line;
1944         my $result = '';
1945
1946         $line = $from_line;
1947         #assert($line =~ m/^---/) if DEBUG;
1948         # no extra formatting for "^--- /dev/null"
1949         if (! $diffinfo->{'nparents'}) {
1950                 # ordinary (single parent) diff
1951                 if ($line =~ m!^--- "?a/!) {
1952                         if ($from->{'href'}) {
1953                                 $line = '--- a/' .
1954                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1955                                                 esc_path($from->{'file'}));
1956                         } else {
1957                                 $line = '--- a/' .
1958                                         esc_path($from->{'file'});
1959                         }
1960                 }
1961                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1962
1963         } else {
1964                 # combined diff (merge commit)
1965                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1966                         if ($from->{'href'}[$i]) {
1967                                 $line = '--- ' .
1968                                         $cgi->a({-href=>href(action=>"blobdiff",
1969                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1970                                                              hash_parent_base=>$parents[$i],
1971                                                              file_parent=>$from->{'file'}[$i],
1972                                                              hash=>$diffinfo->{'to_id'},
1973                                                              hash_base=>$hash,
1974                                                              file_name=>$to->{'file'}),
1975                                                  -class=>"path",
1976                                                  -title=>"diff" . ($i+1)},
1977                                                 $i+1) .
1978                                         '/' .
1979                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1980                                                 esc_path($from->{'file'}[$i]));
1981                         } else {
1982                                 $line = '--- /dev/null';
1983                         }
1984                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1985                 }
1986         }
1987
1988         $line = $to_line;
1989         #assert($line =~ m/^\+\+\+/) if DEBUG;
1990         # no extra formatting for "^+++ /dev/null"
1991         if ($line =~ m!^\+\+\+ "?b/!) {
1992                 if ($to->{'href'}) {
1993                         $line = '+++ b/' .
1994                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1995                                         esc_path($to->{'file'}));
1996                 } else {
1997                         $line = '+++ b/' .
1998                                 esc_path($to->{'file'});
1999                 }
2000         }
2001         $result .= qq!<div class="diff to_file">$line</div>\n!;
2002
2003         return $result;
2004 }
2005
2006 # create note for patch simplified by combined diff
2007 sub format_diff_cc_simplified {
2008         my ($diffinfo, @parents) = @_;
2009         my $result = '';
2010
2011         $result .= "<div class=\"diff header\">" .
2012                    "diff --cc ";
2013         if (!is_deleted($diffinfo)) {
2014                 $result .= $cgi->a({-href => href(action=>"blob",
2015                                                   hash_base=>$hash,
2016                                                   hash=>$diffinfo->{'to_id'},
2017                                                   file_name=>$diffinfo->{'to_file'}),
2018                                     -class => "path"},
2019                                    esc_path($diffinfo->{'to_file'}));
2020         } else {
2021                 $result .= esc_path($diffinfo->{'to_file'});
2022         }
2023         $result .= "</div>\n" . # class="diff header"
2024                    "<div class=\"diff nodifferences\">" .
2025                    "Simple merge" .
2026                    "</div>\n"; # class="diff nodifferences"
2027
2028         return $result;
2029 }
2030
2031 # format patch (diff) line (not to be used for diff headers)
2032 sub format_diff_line {
2033         my $line = shift;
2034         my ($from, $to) = @_;
2035         my $diff_class = "";
2036
2037         chomp $line;
2038
2039         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2040                 # combined diff
2041                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2042                 if ($line =~ m/^\@{3}/) {
2043                         $diff_class = " chunk_header";
2044                 } elsif ($line =~ m/^\\/) {
2045                         $diff_class = " incomplete";
2046                 } elsif ($prefix =~ tr/+/+/) {
2047                         $diff_class = " add";
2048                 } elsif ($prefix =~ tr/-/-/) {
2049                         $diff_class = " rem";
2050                 }
2051         } else {
2052                 # assume ordinary diff
2053                 my $char = substr($line, 0, 1);
2054                 if ($char eq '+') {
2055                         $diff_class = " add";
2056                 } elsif ($char eq '-') {
2057                         $diff_class = " rem";
2058                 } elsif ($char eq '@') {
2059                         $diff_class = " chunk_header";
2060                 } elsif ($char eq "\\") {
2061                         $diff_class = " incomplete";
2062                 }
2063         }
2064         $line = untabify($line);
2065         if ($from && $to && $line =~ m/^\@{2} /) {
2066                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2067                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2068
2069                 $from_lines = 0 unless defined $from_lines;
2070                 $to_lines   = 0 unless defined $to_lines;
2071
2072                 if ($from->{'href'}) {
2073                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2074                                              -class=>"list"}, $from_text);
2075                 }
2076                 if ($to->{'href'}) {
2077                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2078                                              -class=>"list"}, $to_text);
2079                 }
2080                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2081                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2082                 return "<div class=\"diff$diff_class\">$line</div>\n";
2083         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2084                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2085                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2086
2087                 @from_text = split(' ', $ranges);
2088                 for (my $i = 0; $i < @from_text; ++$i) {
2089                         ($from_start[$i], $from_nlines[$i]) =
2090                                 (split(',', substr($from_text[$i], 1)), 0);
2091                 }
2092
2093                 $to_text   = pop @from_text;
2094                 $to_start  = pop @from_start;
2095                 $to_nlines = pop @from_nlines;
2096
2097                 $line = "<span class=\"chunk_info\">$prefix ";
2098                 for (my $i = 0; $i < @from_text; ++$i) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2101                                                   -class=>"list"}, $from_text[$i]);
2102                         } else {
2103                                 $line .= $from_text[$i];
2104                         }
2105                         $line .= " ";
2106                 }
2107                 if ($to->{'href'}) {
2108                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2109                                           -class=>"list"}, $to_text);
2110                 } else {
2111                         $line .= $to_text;
2112                 }
2113                 $line .= " $prefix</span>" .
2114                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2115                 return "<div class=\"diff$diff_class\">$line</div>\n";
2116         }
2117         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2118 }
2119
2120 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2121 # linked.  Pass the hash of the tree/commit to snapshot.
2122 sub format_snapshot_links {
2123         my ($hash) = @_;
2124         my $num_fmts = @snapshot_fmts;
2125         if ($num_fmts > 1) {
2126                 # A parenthesized list of links bearing format names.
2127                 # e.g. "snapshot (_tar.gz_ _zip_)"
2128                 return "snapshot (" . join(' ', map
2129                         $cgi->a({
2130                                 -href => href(
2131                                         action=>"snapshot",
2132                                         hash=>$hash,
2133                                         snapshot_format=>$_
2134                                 )
2135                         }, $known_snapshot_formats{$_}{'display'})
2136                 , @snapshot_fmts) . ")";
2137         } elsif ($num_fmts == 1) {
2138                 # A single "snapshot" link whose tooltip bears the format name.
2139                 # i.e. "_snapshot_"
2140                 my ($fmt) = @snapshot_fmts;
2141                 return
2142                         $cgi->a({
2143                                 -href => href(
2144                                         action=>"snapshot",
2145                                         hash=>$hash,
2146                                         snapshot_format=>$fmt
2147                                 ),
2148                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2149                         }, "snapshot");
2150         } else { # $num_fmts == 0
2151                 return undef;
2152         }
2153 }
2154
2155 ## ......................................................................
2156 ## functions returning values to be passed, perhaps after some
2157 ## transformation, to other functions; e.g. returning arguments to href()
2158
2159 # returns hash to be passed to href to generate gitweb URL
2160 # in -title key it returns description of link
2161 sub get_feed_info {
2162         my $format = shift || 'Atom';
2163         my %res = (action => lc($format));
2164
2165         # feed links are possible only for project views
2166         return unless (defined $project);
2167         # some views should link to OPML, or to generic project feed,
2168         # or don't have specific feed yet (so they should use generic)
2169         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2170
2171         my $branch;
2172         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2173         # from tag links; this also makes possible to detect branch links
2174         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2175             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2176                 $branch = $1;
2177         }
2178         # find log type for feed description (title)
2179         my $type = 'log';
2180         if (defined $file_name) {
2181                 $type  = "history of $file_name";
2182                 $type .= "/" if ($action eq 'tree');
2183                 $type .= " on '$branch'" if (defined $branch);
2184         } else {
2185                 $type = "log of $branch" if (defined $branch);
2186         }
2187
2188         $res{-title} = $type;
2189         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2190         $res{'file_name'} = $file_name;
2191
2192         return %res;
2193 }
2194
2195 ## ----------------------------------------------------------------------
2196 ## git utility subroutines, invoking git commands
2197
2198 # returns path to the core git executable and the --git-dir parameter as list
2199 sub git_cmd {
2200         $number_of_git_cmds++;
2201         return $GIT, '--git-dir='.$git_dir;
2202 }
2203
2204 # quote the given arguments for passing them to the shell
2205 # quote_command("command", "arg 1", "arg with ' and ! characters")
2206 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2207 # Try to avoid using this function wherever possible.
2208 sub quote_command {
2209         return join(' ',
2210                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2211 }
2212
2213 # get HEAD ref of given project as hash
2214 sub git_get_head_hash {
2215         return git_get_full_hash(shift, 'HEAD');
2216 }
2217
2218 sub git_get_full_hash {
2219         return git_get_hash(@_);
2220 }
2221
2222 sub git_get_short_hash {
2223         return git_get_hash(@_, '--short=7');
2224 }
2225
2226 sub git_get_hash {
2227         my ($project, $hash, @options) = @_;
2228         my $o_git_dir = $git_dir;
2229         my $retval = undef;
2230         $git_dir = "$projectroot/$project";
2231         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2232             '--verify', '-q', @options, $hash) {
2233                 $retval = <$fd>;
2234                 chomp $retval if defined $retval;
2235                 close $fd;
2236         }
2237         if (defined $o_git_dir) {
2238                 $git_dir = $o_git_dir;
2239         }
2240         return $retval;
2241 }
2242
2243 # get type of given object
2244 sub git_get_type {
2245         my $hash = shift;
2246
2247         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2248         my $type = <$fd>;
2249         close $fd or return;
2250         chomp $type;
2251         return $type;
2252 }
2253
2254 # repository configuration
2255 our $config_file = '';
2256 our %config;
2257
2258 # store multiple values for single key as anonymous array reference
2259 # single values stored directly in the hash, not as [ <value> ]
2260 sub hash_set_multi {
2261         my ($hash, $key, $value) = @_;
2262
2263         if (!exists $hash->{$key}) {
2264                 $hash->{$key} = $value;
2265         } elsif (!ref $hash->{$key}) {
2266                 $hash->{$key} = [ $hash->{$key}, $value ];
2267         } else {
2268                 push @{$hash->{$key}}, $value;
2269         }
2270 }
2271
2272 # return hash of git project configuration
2273 # optionally limited to some section, e.g. 'gitweb'
2274 sub git_parse_project_config {
2275         my $section_regexp = shift;
2276         my %config;
2277
2278         local $/ = "\0";
2279
2280         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2281                 or return;
2282
2283         while (my $keyval = <$fh>) {
2284                 chomp $keyval;
2285                 my ($key, $value) = split(/\n/, $keyval, 2);
2286
2287                 hash_set_multi(\%config, $key, $value)
2288                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2289         }
2290         close $fh;
2291
2292         return %config;
2293 }
2294
2295 # convert config value to boolean: 'true' or 'false'
2296 # no value, number > 0, 'true' and 'yes' values are true
2297 # rest of values are treated as false (never as error)
2298 sub config_to_bool {
2299         my $val = shift;
2300
2301         return 1 if !defined $val;             # section.key
2302
2303         # strip leading and trailing whitespace
2304         $val =~ s/^\s+//;
2305         $val =~ s/\s+$//;
2306
2307         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2308                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2309 }
2310
2311 # convert config value to simple decimal number
2312 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2313 # to be multiplied by 1024, 1048576, or 1073741824
2314 sub config_to_int {
2315         my $val = shift;
2316
2317         # strip leading and trailing whitespace
2318         $val =~ s/^\s+//;
2319         $val =~ s/\s+$//;
2320
2321         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2322                 $unit = lc($unit);
2323                 # unknown unit is treated as 1
2324                 return $num * ($unit eq 'g' ? 1073741824 :
2325                                $unit eq 'm' ?    1048576 :
2326                                $unit eq 'k' ?       1024 : 1);
2327         }
2328         return $val;
2329 }
2330
2331 # convert config value to array reference, if needed
2332 sub config_to_multi {
2333         my $val = shift;
2334
2335         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2336 }
2337
2338 sub git_get_project_config {
2339         my ($key, $type) = @_;
2340
2341         return unless defined $git_dir;
2342
2343         # key sanity check
2344         return unless ($key);
2345         $key =~ s/^gitweb\.//;
2346         return if ($key =~ m/\W/);
2347
2348         # type sanity check
2349         if (defined $type) {
2350                 $type =~ s/^--//;
2351                 $type = undef
2352                         unless ($type eq 'bool' || $type eq 'int');
2353         }
2354
2355         # get config
2356         if (!defined $config_file ||
2357             $config_file ne "$git_dir/config") {
2358                 %config = git_parse_project_config('gitweb');
2359                 $config_file = "$git_dir/config";
2360         }
2361
2362         # check if config variable (key) exists
2363         return unless exists $config{"gitweb.$key"};
2364
2365         # ensure given type
2366         if (!defined $type) {
2367                 return $config{"gitweb.$key"};
2368         } elsif ($type eq 'bool') {
2369                 # backward compatibility: 'git config --bool' returns true/false
2370                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2371         } elsif ($type eq 'int') {
2372                 return config_to_int($config{"gitweb.$key"});
2373         }
2374         return $config{"gitweb.$key"};
2375 }
2376
2377 # get hash of given path at given ref
2378 sub git_get_hash_by_path {
2379         my $base = shift;
2380         my $path = shift || return undef;
2381         my $type = shift;
2382
2383         $path =~ s,/+$,,;
2384
2385         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2386                 or die_error(500, "Open git-ls-tree failed");
2387         my $line = <$fd>;
2388         close $fd or return undef;
2389
2390         if (!defined $line) {
2391                 # there is no tree or hash given by $path at $base
2392                 return undef;
2393         }
2394
2395         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2396         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2397         if (defined $type && $type ne $2) {
2398                 # type doesn't match
2399                 return undef;
2400         }
2401         return $3;
2402 }
2403
2404 # get path of entry with given hash at given tree-ish (ref)
2405 # used to get 'from' filename for combined diff (merge commit) for renames
2406 sub git_get_path_by_hash {
2407         my $base = shift || return;
2408         my $hash = shift || return;
2409
2410         local $/ = "\0";
2411
2412         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2413                 or return undef;
2414         while (my $line = <$fd>) {
2415                 chomp $line;
2416
2417                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2418                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2419                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2420                         close $fd;
2421                         return $1;
2422                 }
2423         }
2424         close $fd;
2425         return undef;
2426 }
2427
2428 ## ......................................................................
2429 ## git utility functions, directly accessing git repository
2430
2431 sub git_get_project_description {
2432         my $path = shift;
2433
2434         $git_dir = "$projectroot/$path";
2435         open my $fd, '<', "$git_dir/description"
2436                 or return git_get_project_config('description');
2437         my $descr = <$fd>;
2438         close $fd;
2439         if (defined $descr) {
2440                 chomp $descr;
2441         }
2442         return $descr;
2443 }
2444
2445 sub git_get_project_ctags {
2446         my $path = shift;
2447         my $ctags = {};
2448
2449         $git_dir = "$projectroot/$path";
2450         opendir my $dh, "$git_dir/ctags"
2451                 or return $ctags;
2452         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2453                 open my $ct, '<', $_ or next;
2454                 my $val = <$ct>;
2455                 chomp $val;
2456                 close $ct;
2457                 my $ctag = $_; $ctag =~ s#.*/##;
2458                 $ctags->{$ctag} = $val;
2459         }
2460         closedir $dh;
2461         $ctags;
2462 }
2463
2464 sub git_populate_project_tagcloud {
2465         my $ctags = shift;
2466
2467         # First, merge different-cased tags; tags vote on casing
2468         my %ctags_lc;
2469         foreach (keys %$ctags) {
2470                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2471                 if (not $ctags_lc{lc $_}->{topcount}
2472                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2473                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2474                         $ctags_lc{lc $_}->{topname} = $_;
2475                 }
2476         }
2477
2478         my $cloud;
2479         if (eval { require HTML::TagCloud; 1; }) {
2480                 $cloud = HTML::TagCloud->new;
2481                 foreach (sort keys %ctags_lc) {
2482                         # Pad the title with spaces so that the cloud looks
2483                         # less crammed.
2484                         my $title = $ctags_lc{$_}->{topname};
2485                         $title =~ s/ /&nbsp;/g;
2486                         $title =~ s/^/&nbsp;/g;
2487                         $title =~ s/$/&nbsp;/g;
2488                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2489                 }
2490         } else {
2491                 $cloud = \%ctags_lc;
2492         }
2493         $cloud;
2494 }
2495
2496 sub git_show_project_tagcloud {
2497         my ($cloud, $count) = @_;
2498         print STDERR ref($cloud)."..\n";
2499         if (ref $cloud eq 'HTML::TagCloud') {
2500                 return $cloud->html_and_css($count);
2501         } else {
2502                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2503                 return '<p align="center">' . join (', ', map {
2504                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2505                 } splice(@tags, 0, $count)) . '</p>';
2506         }
2507 }
2508
2509 sub git_get_project_url_list {
2510         my $path = shift;
2511
2512         $git_dir = "$projectroot/$path";
2513         open my $fd, '<', "$git_dir/cloneurl"
2514                 or return wantarray ?
2515                 @{ config_to_multi(git_get_project_config('url')) } :
2516                    config_to_multi(git_get_project_config('url'));
2517         my @git_project_url_list = map { chomp; $_ } <$fd>;
2518         close $fd;
2519
2520         return wantarray ? @git_project_url_list : \@git_project_url_list;
2521 }
2522
2523 sub git_get_projects_list {
2524         my ($filter) = @_;
2525         my @list;
2526
2527         $filter ||= '';
2528         $filter =~ s/\.git$//;
2529
2530         my $check_forks = gitweb_check_feature('forks');
2531
2532         if (-d $projects_list) {
2533                 # search in directory
2534                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2535                 # remove the trailing "/"
2536                 $dir =~ s!/+$!!;
2537                 my $pfxlen = length("$dir");
2538                 my $pfxdepth = ($dir =~ tr!/!!);
2539
2540                 File::Find::find({
2541                         follow_fast => 1, # follow symbolic links
2542                         follow_skip => 2, # ignore duplicates
2543                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2544                         wanted => sub {
2545                                 # global variables
2546                                 our $project_maxdepth;
2547                                 our $projectroot;
2548                                 # skip project-list toplevel, if we get it.
2549                                 return if (m!^[/.]$!);
2550                                 # only directories can be git repositories
2551                                 return unless (-d $_);
2552                                 # don't traverse too deep (Find is super slow on os x)
2553                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2554                                         $File::Find::prune = 1;
2555                                         return;
2556                                 }
2557
2558                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2559                                 # we check related file in $projectroot
2560                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2561                                 if (check_export_ok("$projectroot/$path")) {
2562                                         push @list, { path => $path };
2563                                         $File::Find::prune = 1;
2564                                 }
2565                         },
2566                 }, "$dir");
2567
2568         } elsif (-f $projects_list) {
2569                 # read from file(url-encoded):
2570                 # 'git%2Fgit.git Linus+Torvalds'
2571                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2572                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2573                 my %paths;
2574                 open my $fd, '<', $projects_list or return;
2575         PROJECT:
2576                 while (my $line = <$fd>) {
2577                         chomp $line;
2578                         my ($path, $owner) = split ' ', $line;
2579                         $path = unescape($path);
2580                         $owner = unescape($owner);
2581                         if (!defined $path) {
2582                                 next;
2583                         }
2584                         if ($filter ne '') {
2585                                 # looking for forks;
2586                                 my $pfx = substr($path, 0, length($filter));
2587                                 if ($pfx ne $filter) {
2588                                         next PROJECT;
2589                                 }
2590                                 my $sfx = substr($path, length($filter));
2591                                 if ($sfx !~ /^\/.*\.git$/) {
2592                                         next PROJECT;
2593                                 }
2594                         } elsif ($check_forks) {
2595                         PATH:
2596                                 foreach my $filter (keys %paths) {
2597                                         # looking for forks;
2598                                         my $pfx = substr($path, 0, length($filter));
2599                                         if ($pfx ne $filter) {
2600                                                 next PATH;
2601                                         }
2602                                         my $sfx = substr($path, length($filter));
2603                                         if ($sfx !~ /^\/.*\.git$/) {
2604                                                 next PATH;
2605                                         }
2606                                         # is a fork, don't include it in
2607                                         # the list
2608                                         next PROJECT;
2609                                 }
2610                         }
2611                         if (check_export_ok("$projectroot/$path")) {
2612                                 my $pr = {
2613                                         path => $path,
2614                                         owner => to_utf8($owner),
2615                                 };
2616                                 push @list, $pr;
2617                                 (my $forks_path = $path) =~ s/\.git$//;
2618                                 $paths{$forks_path}++;
2619                         }
2620                 }
2621                 close $fd;
2622         }
2623         return @list;
2624 }
2625
2626 our $gitweb_project_owner = undef;
2627 sub git_get_project_list_from_file {
2628
2629         return if (defined $gitweb_project_owner);
2630
2631         $gitweb_project_owner = {};
2632         # read from file (url-encoded):
2633         # 'git%2Fgit.git Linus+Torvalds'
2634         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2635         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2636         if (-f $projects_list) {
2637                 open(my $fd, '<', $projects_list);
2638                 while (my $line = <$fd>) {
2639                         chomp $line;
2640                         my ($pr, $ow) = split ' ', $line;
2641                         $pr = unescape($pr);
2642                         $ow = unescape($ow);
2643                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2644                 }
2645                 close $fd;
2646         }
2647 }
2648
2649 sub git_get_project_owner {
2650         my $project = shift;
2651         my $owner;
2652
2653         return undef unless $project;
2654         $git_dir = "$projectroot/$project";
2655
2656         if (!defined $gitweb_project_owner) {
2657                 git_get_project_list_from_file();
2658         }
2659
2660         if (exists $gitweb_project_owner->{$project}) {
2661                 $owner = $gitweb_project_owner->{$project};
2662         }
2663         if (!defined $owner){
2664                 $owner = git_get_project_config('owner');
2665         }
2666         if (!defined $owner) {
2667                 $owner = get_file_owner("$git_dir");
2668         }
2669
2670         return $owner;
2671 }
2672
2673 sub git_get_last_activity {
2674         my ($path) = @_;
2675         my $fd;
2676
2677         $git_dir = "$projectroot/$path";
2678         open($fd, "-|", git_cmd(), 'for-each-ref',
2679              '--format=%(committer)',
2680              '--sort=-committerdate',
2681              '--count=1',
2682              'refs/heads') or return;
2683         my $most_recent = <$fd>;
2684         close $fd or return;
2685         if (defined $most_recent &&
2686             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2687                 my $timestamp = $1;
2688                 my $age = time - $timestamp;
2689                 return ($age, age_string($age));
2690         }
2691         return (undef, undef);
2692 }
2693
2694 sub git_get_references {
2695         my $type = shift || "";
2696         my %refs;
2697         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2698         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2699         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2700                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2701                 or return;
2702
2703         while (my $line = <$fd>) {
2704                 chomp $line;
2705                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2706                         if (defined $refs{$1}) {
2707                                 push @{$refs{$1}}, $2;
2708                         } else {
2709                                 $refs{$1} = [ $2 ];
2710                         }
2711                 }
2712         }
2713         close $fd or return;
2714         return \%refs;
2715 }
2716
2717 sub git_get_rev_name_tags {
2718         my $hash = shift || return undef;
2719
2720         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2721                 or return;
2722         my $name_rev = <$fd>;
2723         close $fd;
2724
2725         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2726                 return $1;
2727         } else {
2728                 # catches also '$hash undefined' output
2729                 return undef;
2730         }
2731 }
2732
2733 ## ----------------------------------------------------------------------
2734 ## parse to hash functions
2735
2736 sub parse_date {
2737         my $epoch = shift;
2738         my $tz = shift || "-0000";
2739
2740         my %date;
2741         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2742         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2743         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2744         $date{'hour'} = $hour;
2745         $date{'minute'} = $min;
2746         $date{'mday'} = $mday;
2747         $date{'day'} = $days[$wday];
2748         $date{'month'} = $months[$mon];
2749         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2750                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2751         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2752                              $mday, $months[$mon], $hour ,$min;
2753         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2754                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2755
2756         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2757         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2758         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2759         $date{'hour_local'} = $hour;
2760         $date{'minute_local'} = $min;
2761         $date{'tz_local'} = $tz;
2762         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2763                                   1900+$year, $mon+1, $mday,
2764                                   $hour, $min, $sec, $tz);
2765         return %date;
2766 }
2767
2768 sub parse_tag {
2769         my $tag_id = shift;
2770         my %tag;
2771         my @comment;
2772
2773         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2774         $tag{'id'} = $tag_id;
2775         while (my $line = <$fd>) {
2776                 chomp $line;
2777                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2778                         $tag{'object'} = $1;
2779                 } elsif ($line =~ m/^type (.+)$/) {
2780                         $tag{'type'} = $1;
2781                 } elsif ($line =~ m/^tag (.+)$/) {
2782                         $tag{'name'} = $1;
2783                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2784                         $tag{'author'} = $1;
2785                         $tag{'author_epoch'} = $2;
2786                         $tag{'author_tz'} = $3;
2787                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2788                                 $tag{'author_name'}  = $1;
2789                                 $tag{'author_email'} = $2;
2790                         } else {
2791                                 $tag{'author_name'} = $tag{'author'};
2792                         }
2793                 } elsif ($line =~ m/--BEGIN/) {
2794                         push @comment, $line;
2795                         last;
2796                 } elsif ($line eq "") {
2797                         last;
2798                 }
2799         }
2800         push @comment, <$fd>;
2801         $tag{'comment'} = \@comment;
2802         close $fd or return;
2803         if (!defined $tag{'name'}) {
2804                 return
2805         };
2806         return %tag
2807 }
2808
2809 sub parse_commit_text {
2810         my ($commit_text, $withparents) = @_;
2811         my @commit_lines = split '\n', $commit_text;
2812         my %co;
2813
2814         pop @commit_lines; # Remove '\0'
2815
2816         if (! @commit_lines) {
2817                 return;
2818         }
2819
2820         my $header = shift @commit_lines;
2821         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2822                 return;
2823         }
2824         ($co{'id'}, my @parents) = split ' ', $header;
2825         while (my $line = shift @commit_lines) {
2826                 last if $line eq "\n";
2827                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2828                         $co{'tree'} = $1;
2829                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2830                         push @parents, $1;
2831                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2832                         $co{'author'} = to_utf8($1);
2833                         $co{'author_epoch'} = $2;
2834                         $co{'author_tz'} = $3;
2835                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2836                                 $co{'author_name'}  = $1;
2837                                 $co{'author_email'} = $2;
2838                         } else {
2839                                 $co{'author_name'} = $co{'author'};
2840                         }
2841                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2842                         $co{'committer'} = to_utf8($1);
2843                         $co{'committer_epoch'} = $2;
2844                         $co{'committer_tz'} = $3;
2845                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2846                                 $co{'committer_name'}  = $1;
2847                                 $co{'committer_email'} = $2;
2848                         } else {
2849                                 $co{'committer_name'} = $co{'committer'};
2850                         }
2851                 }
2852         }
2853         if (!defined $co{'tree'}) {
2854                 return;
2855         };
2856         $co{'parents'} = \@parents;
2857         $co{'parent'} = $parents[0];
2858
2859         foreach my $title (@commit_lines) {
2860                 $title =~ s/^    //;
2861                 if ($title ne "") {
2862                         $co{'title'} = chop_str($title, 80, 5);
2863                         # remove leading stuff of merges to make the interesting part visible
2864                         if (length($title) > 50) {
2865                                 $title =~ s/^Automatic //;
2866                                 $title =~ s/^merge (of|with) /Merge ... /i;
2867                                 if (length($title) > 50) {
2868                                         $title =~ s/(http|rsync):\/\///;
2869                                 }
2870                                 if (length($title) > 50) {
2871                                         $title =~ s/(master|www|rsync)\.//;
2872                                 }
2873                                 if (length($title) > 50) {
2874                                         $title =~ s/kernel.org:?//;
2875                                 }
2876                                 if (length($title) > 50) {
2877                                         $title =~ s/\/pub\/scm//;
2878                                 }
2879                         }
2880                         $co{'title_short'} = chop_str($title, 50, 5);
2881                         last;
2882                 }
2883         }
2884         if (! defined $co{'title'} || $co{'title'} eq "") {
2885                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2886         }
2887         # remove added spaces
2888         foreach my $line (@commit_lines) {
2889                 $line =~ s/^    //;
2890         }
2891         $co{'comment'} = \@commit_lines;
2892
2893         my $age = time - $co{'committer_epoch'};
2894         $co{'age'} = $age;
2895         $co{'age_string'} = age_string($age);
2896         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2897         if ($age > 60*60*24*7*2) {
2898                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2899                 $co{'age_string_age'} = $co{'age_string'};
2900         } else {
2901                 $co{'age_string_date'} = $co{'age_string'};
2902                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2903         }
2904         return %co;
2905 }
2906
2907 sub parse_commit {
2908         my ($commit_id) = @_;
2909         my %co;
2910
2911         local $/ = "\0";
2912
2913         open my $fd, "-|", git_cmd(), "rev-list",
2914                 "--parents",
2915                 "--header",
2916                 "--max-count=1",
2917                 $commit_id,
2918                 "--",
2919                 or die_error(500, "Open git-rev-list failed");
2920         %co = parse_commit_text(<$fd>, 1);
2921         close $fd;
2922
2923         return %co;
2924 }
2925
2926 sub parse_commits {
2927         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2928         my @cos;
2929
2930         $maxcount ||= 1;
2931         $skip ||= 0;
2932
2933         local $/ = "\0";
2934
2935         open my $fd, "-|", git_cmd(), "rev-list",
2936                 "--header",
2937                 @args,
2938                 ("--max-count=" . $maxcount),
2939                 ("--skip=" . $skip),
2940                 @extra_options,
2941                 $commit_id,
2942                 "--",
2943                 ($filename ? ($filename) : ())
2944                 or die_error(500, "Open git-rev-list failed");
2945         while (my $line = <$fd>) {
2946                 my %co = parse_commit_text($line);
2947                 push @cos, \%co;
2948         }
2949         close $fd;
2950
2951         return wantarray ? @cos : \@cos;
2952 }
2953
2954 # parse line of git-diff-tree "raw" output
2955 sub parse_difftree_raw_line {
2956         my $line = shift;
2957         my %res;
2958
2959         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2960         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2961         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2962                 $res{'from_mode'} = $1;
2963                 $res{'to_mode'} = $2;
2964                 $res{'from_id'} = $3;
2965                 $res{'to_id'} = $4;
2966                 $res{'status'} = $5;
2967                 $res{'similarity'} = $6;
2968                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2969                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2970                 } else {
2971                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2972                 }
2973         }
2974         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2975         # combined diff (for merge commit)
2976         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2977                 $res{'nparents'}  = length($1);
2978                 $res{'from_mode'} = [ split(' ', $2) ];
2979                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2980                 $res{'from_id'} = [ split(' ', $3) ];
2981                 $res{'to_id'} = pop @{$res{'from_id'}};
2982                 $res{'status'} = [ split('', $4) ];
2983                 $res{'to_file'} = unquote($5);
2984         }
2985         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2986         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2987                 $res{'commit'} = $1;
2988         }
2989
2990         return wantarray ? %res : \%res;
2991 }
2992
2993 # wrapper: return parsed line of git-diff-tree "raw" output
2994 # (the argument might be raw line, or parsed info)
2995 sub parsed_difftree_line {
2996         my $line_or_ref = shift;
2997
2998         if (ref($line_or_ref) eq "HASH") {
2999                 # pre-parsed (or generated by hand)
3000                 return $line_or_ref;
3001         } else {
3002                 return parse_difftree_raw_line($line_or_ref);
3003         }
3004 }
3005
3006 # parse line of git-ls-tree output
3007 sub parse_ls_tree_line {
3008         my $line = shift;
3009         my %opts = @_;
3010         my %res;
3011
3012         if ($opts{'-l'}) {
3013                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3014                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3015
3016                 $res{'mode'} = $1;
3017                 $res{'type'} = $2;
3018                 $res{'hash'} = $3;
3019                 $res{'size'} = $4;
3020                 if ($opts{'-z'}) {
3021                         $res{'name'} = $5;
3022                 } else {
3023                         $res{'name'} = unquote($5);
3024                 }
3025         } else {
3026                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3027                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3028
3029                 $res{'mode'} = $1;
3030                 $res{'type'} = $2;
3031                 $res{'hash'} = $3;
3032                 if ($opts{'-z'}) {
3033                         $res{'name'} = $4;
3034                 } else {
3035                         $res{'name'} = unquote($4);
3036                 }
3037         }
3038
3039         return wantarray ? %res : \%res;
3040 }
3041
3042 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3043 sub parse_from_to_diffinfo {
3044         my ($diffinfo, $from, $to, @parents) = @_;
3045
3046         if ($diffinfo->{'nparents'}) {
3047                 # combined diff
3048                 $from->{'file'} = [];
3049                 $from->{'href'} = [];
3050                 fill_from_file_info($diffinfo, @parents)
3051                         unless exists $diffinfo->{'from_file'};
3052                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3053                         $from->{'file'}[$i] =
3054                                 defined $diffinfo->{'from_file'}[$i] ?
3055                                         $diffinfo->{'from_file'}[$i] :
3056                                         $diffinfo->{'to_file'};
3057                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3058                                 $from->{'href'}[$i] = href(action=>"blob",
3059                                                            hash_base=>$parents[$i],
3060                                                            hash=>$diffinfo->{'from_id'}[$i],
3061                                                            file_name=>$from->{'file'}[$i]);
3062                         } else {
3063                                 $from->{'href'}[$i] = undef;
3064                         }
3065                 }
3066         } else {
3067                 # ordinary (not combined) diff
3068                 $from->{'file'} = $diffinfo->{'from_file'};
3069                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3070                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3071                                                hash=>$diffinfo->{'from_id'},
3072                                                file_name=>$from->{'file'});
3073                 } else {
3074                         delete $from->{'href'};
3075                 }
3076         }
3077
3078         $to->{'file'} = $diffinfo->{'to_file'};
3079         if (!is_deleted($diffinfo)) { # file exists in result
3080                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3081                                      hash=>$diffinfo->{'to_id'},
3082                                      file_name=>$to->{'file'});
3083         } else {
3084                 delete $to->{'href'};
3085         }
3086 }
3087
3088 ## ......................................................................
3089 ## parse to array of hashes functions
3090
3091 sub git_get_heads_list {
3092         my $limit = shift;
3093         my @headslist;
3094
3095         open my $fd, '-|', git_cmd(), 'for-each-ref',
3096                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3097                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3098                 'refs/heads'
3099                 or return;
3100         while (my $line = <$fd>) {
3101                 my %ref_item;
3102
3103                 chomp $line;
3104                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3105                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3106                 my ($committer, $epoch, $tz) =
3107                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3108                 $ref_item{'fullname'}  = $name;
3109                 $name =~ s!^refs/heads/!!;
3110
3111                 $ref_item{'name'}  = $name;
3112                 $ref_item{'id'}    = $hash;
3113                 $ref_item{'title'} = $title || '(no commit message)';
3114                 $ref_item{'epoch'} = $epoch;
3115                 if ($epoch) {
3116                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3117                 } else {
3118                         $ref_item{'age'} = "unknown";
3119                 }
3120
3121                 push @headslist, \%ref_item;
3122         }
3123         close $fd;
3124
3125         return wantarray ? @headslist : \@headslist;
3126 }
3127
3128 sub git_get_tags_list {
3129         my $limit = shift;
3130         my @tagslist;
3131
3132         open my $fd, '-|', git_cmd(), 'for-each-ref',
3133                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3134                 '--format=%(objectname) %(objecttype) %(refname) '.
3135                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3136                 'refs/tags'
3137                 or return;
3138         while (my $line = <$fd>) {
3139                 my %ref_item;
3140
3141                 chomp $line;
3142                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3143                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3144                 my ($creator, $epoch, $tz) =
3145                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3146                 $ref_item{'fullname'} = $name;
3147                 $name =~ s!^refs/tags/!!;
3148
3149                 $ref_item{'type'} = $type;
3150                 $ref_item{'id'} = $id;
3151                 $ref_item{'name'} = $name;
3152                 if ($type eq "tag") {
3153                         $ref_item{'subject'} = $title;
3154                         $ref_item{'reftype'} = $reftype;
3155                         $ref_item{'refid'}   = $refid;
3156                 } else {
3157                         $ref_item{'reftype'} = $type;
3158                         $ref_item{'refid'}   = $id;
3159                 }
3160
3161                 if ($type eq "tag" || $type eq "commit") {
3162                         $ref_item{'epoch'} = $epoch;
3163                         if ($epoch) {
3164                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3165                         } else {
3166                                 $ref_item{'age'} = "unknown";
3167                         }
3168                 }
3169
3170                 push @tagslist, \%ref_item;
3171         }
3172         close $fd;
3173
3174         return wantarray ? @tagslist : \@tagslist;
3175 }
3176
3177 ## ----------------------------------------------------------------------
3178 ## filesystem-related functions
3179
3180 sub get_file_owner {
3181         my $path = shift;
3182
3183         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3184         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3185         if (!defined $gcos) {
3186                 return undef;
3187         }
3188         my $owner = $gcos;
3189         $owner =~ s/[,;].*$//;
3190         return to_utf8($owner);
3191 }
3192
3193 # assume that file exists
3194 sub insert_file {
3195         my $filename = shift;
3196
3197         open my $fd, '<', $filename;
3198         print map { to_utf8($_) } <$fd>;
3199         close $fd;
3200 }
3201
3202 ## ......................................................................
3203 ## mimetype related functions
3204
3205 sub mimetype_guess_file {
3206         my $filename = shift;
3207         my $mimemap = shift;
3208         -r $mimemap or return undef;
3209
3210         my %mimemap;
3211         open(my $mh, '<', $mimemap) or return undef;
3212         while (<$mh>) {
3213                 next if m/^#/; # skip comments
3214                 my ($mimetype, $exts) = split(/\t+/);
3215                 if (defined $exts) {
3216                         my @exts = split(/\s+/, $exts);
3217                         foreach my $ext (@exts) {
3218                                 $mimemap{$ext} = $mimetype;
3219                         }
3220                 }
3221         }
3222         close($mh);
3223
3224         $filename =~ /\.([^.]*)$/;
3225         return $mimemap{$1};
3226 }
3227
3228 sub mimetype_guess {
3229         my $filename = shift;
3230         my $mime;
3231         $filename =~ /\./ or return undef;
3232
3233         if ($mimetypes_file) {
3234                 my $file = $mimetypes_file;
3235                 if ($file !~ m!^/!) { # if it is relative path
3236                         # it is relative to project
3237                         $file = "$projectroot/$project/$file";
3238                 }
3239                 $mime = mimetype_guess_file($filename, $file);
3240         }
3241         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3242         return $mime;
3243 }
3244
3245 sub blob_mimetype {
3246         my $fd = shift;
3247         my $filename = shift;
3248
3249         if ($filename) {
3250                 my $mime = mimetype_guess($filename);
3251                 $mime and return $mime;
3252         }
3253
3254         # just in case
3255         return $default_blob_plain_mimetype unless $fd;
3256
3257         if (-T $fd) {
3258                 return 'text/plain';
3259         } elsif (! $filename) {
3260                 return 'application/octet-stream';
3261         } elsif ($filename =~ m/\.png$/i) {
3262                 return 'image/png';
3263         } elsif ($filename =~ m/\.gif$/i) {
3264                 return 'image/gif';
3265         } elsif ($filename =~ m/\.jpe?g$/i) {
3266                 return 'image/jpeg';
3267         } else {
3268                 return 'application/octet-stream';
3269         }
3270 }
3271
3272 sub blob_contenttype {
3273         my ($fd, $file_name, $type) = @_;
3274
3275         $type ||= blob_mimetype($fd, $file_name);
3276         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3277                 $type .= "; charset=$default_text_plain_charset";
3278         }
3279
3280         return $type;
3281 }
3282
3283 ## ======================================================================
3284 ## functions printing HTML: header, footer, error page
3285
3286 sub get_page_title {
3287         my $title = to_utf8($site_name);
3288
3289         return $title unless (defined $project);
3290         $title .= " - " . to_utf8($project);
3291
3292         return $title unless (defined $action);
3293         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3294
3295         return $title unless (defined $file_name);
3296         $title .= " - " . esc_path($file_name);
3297         if ($action eq "tree" && $file_name !~ m|/$|) {
3298                 $title .= "/";
3299         }
3300
3301         return $title;
3302 }
3303
3304 sub git_header_html {
3305         my $status = shift || "200 OK";
3306         my $expires = shift;
3307         my %opts = @_;
3308
3309         my $title = get_page_title();
3310         my $content_type;
3311         # require explicit support from the UA if we are to send the page as
3312         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3313         # we have to do this because MSIE sometimes globs '*/*', pretending to
3314         # support xhtml+xml but choking when it gets what it asked for.
3315         if (defined $cgi->http('HTTP_ACCEPT') &&
3316             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3317             $cgi->Accept('application/xhtml+xml') != 0) {
3318                 $content_type = 'application/xhtml+xml';
3319         } else {
3320                 $content_type = 'text/html';
3321         }
3322         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3323                            -status=> $status, -expires => $expires)
3324                 unless ($opts{'-no_http_headers'});
3325         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3326         print <<EOF;
3327 <?xml version="1.0" encoding="utf-8"?>
3328 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3329 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3330 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3331 <!-- git core binaries version $git_version -->
3332 <head>
3333 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3334 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3335 <meta name="robots" content="index, nofollow"/>
3336 <title>$title</title>
3337 EOF
3338         # the stylesheet, favicon etc urls won't work correctly with path_info
3339         # unless we set the appropriate base URL
3340         if ($ENV{'PATH_INFO'}) {
3341                 print "<base href=\"".esc_url($base_url)."\" />\n";
3342         }
3343         # print out each stylesheet that exist, providing backwards capability
3344         # for those people who defined $stylesheet in a config file
3345         if (defined $stylesheet) {
3346                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3347         } else {
3348                 foreach my $stylesheet (@stylesheets) {
3349                         next unless $stylesheet;
3350                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3351                 }
3352         }
3353         if (defined $project) {
3354                 my %href_params = get_feed_info();
3355                 if (!exists $href_params{'-title'}) {
3356                         $href_params{'-title'} = 'log';
3357                 }
3358
3359                 foreach my $format qw(RSS Atom) {
3360                         my $type = lc($format);
3361                         my %link_attr = (
3362                                 '-rel' => 'alternate',
3363                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3364                                 '-type' => "application/$type+xml"
3365                         );
3366
3367                         $href_params{'action'} = $type;
3368                         $link_attr{'-href'} = href(%href_params);
3369                         print "<link ".
3370                               "rel=\"$link_attr{'-rel'}\" ".
3371                               "title=\"$link_attr{'-title'}\" ".
3372                               "href=\"$link_attr{'-href'}\" ".
3373                               "type=\"$link_attr{'-type'}\" ".
3374                               "/>\n";
3375
3376                         $href_params{'extra_options'} = '--no-merges';
3377                         $link_attr{'-href'} = href(%href_params);
3378                         $link_attr{'-title'} .= ' (no merges)';
3379                         print "<link ".
3380                               "rel=\"$link_attr{'-rel'}\" ".
3381                               "title=\"$link_attr{'-title'}\" ".
3382                               "href=\"$link_attr{'-href'}\" ".
3383                               "type=\"$link_attr{'-type'}\" ".
3384                               "/>\n";
3385                 }
3386
3387         } else {
3388                 printf('<link rel="alternate" title="%s projects list" '.
3389                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3390                        $site_name, href(project=>undef, action=>"project_index"));
3391                 printf('<link rel="alternate" title="%s projects feeds" '.
3392                        'href="%s" type="text/x-opml" />'."\n",
3393                        $site_name, href(project=>undef, action=>"opml"));
3394         }
3395         if (defined $favicon) {
3396                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3397         }
3398
3399         print "</head>\n" .
3400               "<body>\n";
3401
3402         if (defined $site_header && -f $site_header) {
3403                 insert_file($site_header);
3404         }
3405
3406         print "<div class=\"page_header\">\n" .
3407               $cgi->a({-href => esc_url($logo_url),
3408                        -title => $logo_label},
3409                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3410         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3411         if (defined $project) {
3412                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3413                 if (defined $action) {
3414                         print " / $action";
3415                 }
3416                 print "\n";
3417         }
3418         print "</div>\n";
3419
3420         my $have_search = gitweb_check_feature('search');
3421         if (defined $project && $have_search) {
3422                 if (!defined $searchtext) {
3423                         $searchtext = "";
3424                 }
3425                 my $search_hash;
3426                 if (defined $hash_base) {
3427                         $search_hash = $hash_base;
3428                 } elsif (defined $hash) {
3429                         $search_hash = $hash;
3430                 } else {
3431                         $search_hash = "HEAD";
3432                 }
3433                 my $action = $my_uri;
3434                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3435                 if ($use_pathinfo) {
3436                         $action .= "/".esc_url($project);
3437                 }
3438                 print $cgi->startform(-method => "get", -action => $action) .
3439                       "<div class=\"search\">\n" .
3440                       (!$use_pathinfo &&
3441                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3442                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3443                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3444                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3445                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3446                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3447                       " search:\n",
3448                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3449                       "<span title=\"Extended regular expression\">" .
3450                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3451                                      -checked => $search_use_regexp) .
3452                       "</span>" .
3453                       "</div>" .
3454                       $cgi->end_form() . "\n";
3455         }
3456 }
3457
3458 sub git_footer_html {
3459         my $feed_class = 'rss_logo';
3460
3461         print "<div class=\"page_footer\">\n";
3462         if (defined $project) {
3463                 my $descr = git_get_project_description($project);
3464                 if (defined $descr) {
3465                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3466                 }
3467
3468                 my %href_params = get_feed_info();
3469                 if (!%href_params) {
3470                         $feed_class .= ' generic';
3471                 }
3472                 $href_params{'-title'} ||= 'log';
3473
3474                 foreach my $format qw(RSS Atom) {
3475                         $href_params{'action'} = lc($format);
3476                         print $cgi->a({-href => href(%href_params),
3477                                       -title => "$href_params{'-title'} $format feed",
3478                                       -class => $feed_class}, $format)."\n";
3479                 }
3480
3481         } else {
3482                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3483                               -class => $feed_class}, "OPML") . " ";
3484                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3485                               -class => $feed_class}, "TXT") . "\n";
3486         }
3487         print "</div>\n"; # class="page_footer"
3488
3489         if (defined $t0 && gitweb_check_feature('timed')) {
3490                 print "<div id=\"generating_info\">\n";
3491                 print 'This page took '.
3492                       '<span id="generating_time" class="time_span">'.
3493                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3494                       ' seconds </span>'.
3495                       ' and '.
3496                       '<span id="generating_cmd">'.
3497                       $number_of_git_cmds.
3498                       '</span> git commands '.
3499                       " to generate.\n";
3500                 print "</div>\n"; # class="page_footer"
3501         }
3502
3503         if (defined $site_footer && -f $site_footer) {
3504                 insert_file($site_footer);
3505         }
3506
3507         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3508         if (defined $action &&
3509             $action eq 'blame_incremental') {
3510                 print qq!<script type="text/javascript">\n!.
3511                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3512                       qq!           "!. href() .qq!");\n!.
3513                       qq!</script>\n!;
3514         } elsif (gitweb_check_feature('javascript-actions')) {
3515                 print qq!<script type="text/javascript">\n!.
3516                       qq!window.onload = fixLinks;\n!.
3517                       qq!</script>\n!;
3518         }
3519
3520         print "</body>\n" .
3521               "</html>";
3522 }
3523
3524 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3525 # Example: die_error(404, 'Hash not found')
3526 # By convention, use the following status codes (as defined in RFC 2616):
3527 # 400: Invalid or missing CGI parameters, or
3528 #      requested object exists but has wrong type.
3529 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3530 #      this server or project.
3531 # 404: Requested object/revision/project doesn't exist.
3532 # 500: The server isn't configured properly, or
3533 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3534 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3535 # 503: The server is currently unavailable (because it is overloaded,
3536 #      or down for maintenance).  Generally, this is a temporary state.
3537 sub die_error {
3538         my $status = shift || 500;
3539         my $error = esc_html(shift) || "Internal Server Error";
3540         my $extra = shift;
3541         my %opts = @_;
3542
3543         my %http_responses = (
3544                 400 => '400 Bad Request',
3545                 403 => '403 Forbidden',
3546                 404 => '404 Not Found',
3547                 500 => '500 Internal Server Error',
3548                 503 => '503 Service Unavailable',
3549         );
3550         git_header_html($http_responses{$status}, undef, %opts);
3551         print <<EOF;
3552 <div class="page_body">
3553 <br /><br />
3554 $status - $error
3555 <br />
3556 EOF
3557         if (defined $extra) {
3558                 print "<hr />\n" .
3559                       "$extra\n";
3560         }
3561         print "</div>\n";
3562
3563         git_footer_html();
3564         goto DONE_GITWEB
3565                 unless ($opts{'-error_handler'});
3566 }
3567
3568 ## ----------------------------------------------------------------------
3569 ## functions printing or outputting HTML: navigation
3570
3571 sub git_print_page_nav {
3572         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3573         $extra = '' if !defined $extra; # pager or formats
3574
3575         my @navs = qw(summary shortlog log commit commitdiff tree);
3576         if ($suppress) {
3577                 @navs = grep { $_ ne $suppress } @navs;
3578         }
3579
3580         my %arg = map { $_ => {action=>$_} } @navs;
3581         if (defined $head) {
3582                 for (qw(commit commitdiff)) {
3583                         $arg{$_}{'hash'} = $head;
3584                 }
3585                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3586                         for (qw(shortlog log)) {
3587                                 $arg{$_}{'hash'} = $head;
3588                         }
3589                 }
3590         }
3591
3592         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3593         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3594
3595         my @actions = gitweb_get_feature('actions');
3596         my %repl = (
3597                 '%' => '%',
3598                 'n' => $project,         # project name
3599                 'f' => $git_dir,         # project path within filesystem
3600                 'h' => $treehead || '',  # current hash ('h' parameter)
3601                 'b' => $treebase || '',  # hash base ('hb' parameter)
3602         );
3603         while (@actions) {
3604                 my ($label, $link, $pos) = splice(@actions,0,3);
3605                 # insert
3606                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3607                 # munch munch
3608                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3609                 $arg{$label}{'_href'} = $link;
3610         }
3611
3612         print "<div class=\"page_nav\">\n" .
3613                 (join " | ",
3614                  map { $_ eq $current ?
3615                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3616                  } @navs);
3617         print "<br/>\n$extra<br/>\n" .
3618               "</div>\n";
3619 }
3620
3621 sub format_paging_nav {
3622         my ($action, $page, $has_next_link) = @_;
3623         my $paging_nav;
3624
3625
3626         if ($page > 0) {
3627                 $paging_nav .=
3628                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3629                         " &sdot; " .
3630                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3631                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3632         } else {
3633                 $paging_nav .= "first &sdot; prev";
3634         }
3635
3636         if ($has_next_link) {
3637                 $paging_nav .= " &sdot; " .
3638                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3639                                  -accesskey => "n", -title => "Alt-n"}, "next");
3640         } else {
3641                 $paging_nav .= " &sdot; next";
3642         }
3643
3644         return $paging_nav;
3645 }
3646
3647 ## ......................................................................
3648 ## functions printing or outputting HTML: div
3649
3650 sub git_print_header_div {
3651         my ($action, $title, $hash, $hash_base) = @_;
3652         my %args = ();
3653
3654         $args{'action'} = $action;
3655         $args{'hash'} = $hash if $hash;
3656         $args{'hash_base'} = $hash_base if $hash_base;
3657
3658         print "<div class=\"header\">\n" .
3659               $cgi->a({-href => href(%args), -class => "title"},
3660               $title ? $title : $action) .
3661               "\n</div>\n";
3662 }
3663
3664 sub print_local_time {
3665         print format_local_time(@_);
3666 }
3667
3668 sub format_local_time {
3669         my $localtime = '';
3670         my %date = @_;
3671         if ($date{'hour_local'} < 6) {
3672                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3673                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3674         } else {
3675                 $localtime .= sprintf(" (%02d:%02d %s)",
3676                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3677         }
3678
3679         return $localtime;
3680 }
3681
3682 # Outputs the author name and date in long form
3683 sub git_print_authorship {
3684         my $co = shift;
3685         my %opts = @_;
3686         my $tag = $opts{-tag} || 'div';
3687         my $author = $co->{'author_name'};
3688
3689         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3690         print "<$tag class=\"author_date\">" .
3691               format_search_author($author, "author", esc_html($author)) .
3692               " [$ad{'rfc2822'}";
3693         print_local_time(%ad) if ($opts{-localtime});
3694         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3695                   . "</$tag>\n";
3696 }
3697
3698 # Outputs table rows containing the full author or committer information,
3699 # in the format expected for 'commit' view (& similia).
3700 # Parameters are a commit hash reference, followed by the list of people
3701 # to output information for. If the list is empty it defalts to both
3702 # author and committer.
3703 sub git_print_authorship_rows {
3704         my $co = shift;
3705         # too bad we can't use @people = @_ || ('author', 'committer')
3706         my @people = @_;
3707         @people = ('author', 'committer') unless @people;
3708         foreach my $who (@people) {
3709                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3710                 print "<tr><td>$who</td><td>" .
3711                       format_search_author($co->{"${who}_name"}, $who,
3712                                esc_html($co->{"${who}_name"})) . " " .
3713                       format_search_author($co->{"${who}_email"}, $who,
3714                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3715                       "</td><td rowspan=\"2\">" .
3716                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3717                       "</td></tr>\n" .
3718                       "<tr>" .
3719                       "<td></td><td> $wd{'rfc2822'}";
3720                 print_local_time(%wd);
3721                 print "</td>" .
3722                       "</tr>\n";
3723         }
3724 }
3725
3726 sub git_print_page_path {
3727         my $name = shift;
3728         my $type = shift;
3729         my $hb = shift;
3730
3731
3732         print "<div class=\"page_path\">";
3733         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3734                       -title => 'tree root'}, to_utf8("[$project]"));
3735         print " / ";
3736         if (defined $name) {
3737                 my @dirname = split '/', $name;
3738                 my $basename = pop @dirname;
3739                 my $fullname = '';
3740
3741                 foreach my $dir (@dirname) {
3742                         $fullname .= ($fullname ? '/' : '') . $dir;
3743                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3744                                                      hash_base=>$hb),
3745                                       -title => $fullname}, esc_path($dir));
3746                         print " / ";
3747                 }
3748                 if (defined $type && $type eq 'blob') {
3749                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3750                                                      hash_base=>$hb),
3751                                       -title => $name}, esc_path($basename));
3752                 } elsif (defined $type && $type eq 'tree') {
3753                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3754                                                      hash_base=>$hb),
3755                                       -title => $name}, esc_path($basename));
3756                         print " / ";
3757                 } else {
3758                         print esc_path($basename);
3759                 }
3760         }
3761         print "<br/></div>\n";
3762 }
3763
3764 sub git_print_log {
3765         my $log = shift;
3766         my %opts = @_;
3767
3768         if ($opts{'-remove_title'}) {
3769                 # remove title, i.e. first line of log
3770                 shift @$log;
3771         }
3772         # remove leading empty lines
3773         while (defined $log->[0] && $log->[0] eq "") {
3774                 shift @$log;
3775         }
3776
3777         # print log
3778         my $signoff = 0;
3779         my $empty = 0;
3780         foreach my $line (@$log) {
3781                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3782                         $signoff = 1;
3783                         $empty = 0;
3784                         if (! $opts{'-remove_signoff'}) {
3785                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3786                                 next;
3787                         } else {
3788                                 # remove signoff lines
3789                                 next;
3790                         }
3791                 } else {
3792                         $signoff = 0;
3793                 }
3794
3795                 # print only one empty line
3796                 # do not print empty line after signoff
3797                 if ($line eq "") {
3798                         next if ($empty || $signoff);
3799                         $empty = 1;
3800                 } else {
3801                         $empty = 0;
3802                 }
3803
3804                 print format_log_line_html($line) . "<br/>\n";
3805         }
3806
3807         if ($opts{'-final_empty_line'}) {
3808                 # end with single empty line
3809                 print "<br/>\n" unless $empty;
3810         }
3811 }
3812
3813 # return link target (what link points to)
3814 sub git_get_link_target {
3815         my $hash = shift;
3816         my $link_target;
3817
3818         # read link
3819         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3820                 or return;
3821         {
3822                 local $/ = undef;
3823                 $link_target = <$fd>;
3824         }
3825         close $fd
3826                 or return;
3827
3828         return $link_target;
3829 }
3830
3831 # given link target, and the directory (basedir) the link is in,
3832 # return target of link relative to top directory (top tree);
3833 # return undef if it is not possible (including absolute links).
3834 sub normalize_link_target {
3835         my ($link_target, $basedir) = @_;
3836
3837         # absolute symlinks (beginning with '/') cannot be normalized
3838         return if (substr($link_target, 0, 1) eq '/');
3839
3840         # normalize link target to path from top (root) tree (dir)
3841         my $path;
3842         if ($basedir) {
3843                 $path = $basedir . '/' . $link_target;
3844         } else {
3845                 # we are in top (root) tree (dir)
3846                 $path = $link_target;
3847         }
3848
3849         # remove //, /./, and /../
3850         my @path_parts;
3851         foreach my $part (split('/', $path)) {
3852                 # discard '.' and ''
3853                 next if (!$part || $part eq '.');
3854                 # handle '..'
3855                 if ($part eq '..') {
3856                         if (@path_parts) {
3857                                 pop @path_parts;
3858                         } else {
3859                                 # link leads outside repository (outside top dir)
3860                                 return;
3861                         }
3862                 } else {
3863                         push @path_parts, $part;
3864                 }
3865         }
3866         $path = join('/', @path_parts);
3867
3868         return $path;
3869 }
3870
3871 # print tree entry (row of git_tree), but without encompassing <tr> element
3872 sub git_print_tree_entry {
3873         my ($t, $basedir, $hash_base, $have_blame) = @_;
3874
3875         my %base_key = ();
3876         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3877
3878         # The format of a table row is: mode list link.  Where mode is
3879         # the mode of the entry, list is the name of the entry, an href,
3880         # and link is the action links of the entry.
3881
3882         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3883         if (exists $t->{'size'}) {
3884                 print "<td class=\"size\">$t->{'size'}</td>\n";
3885         }
3886         if ($t->{'type'} eq "blob") {
3887                 print "<td class=\"list\">" .
3888                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3889                                                file_name=>"$basedir$t->{'name'}", %base_key),
3890                                 -class => "list"}, esc_path($t->{'name'}));
3891                 if (S_ISLNK(oct $t->{'mode'})) {
3892                         my $link_target = git_get_link_target($t->{'hash'});
3893                         if ($link_target) {
3894                                 my $norm_target = normalize_link_target($link_target, $basedir);
3895                                 if (defined $norm_target) {
3896                                         print " -> " .
3897                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3898                                                                      file_name=>$norm_target),
3899                                                        -title => $norm_target}, esc_path($link_target));
3900                                 } else {
3901                                         print " -> " . esc_path($link_target);
3902                                 }
3903                         }
3904                 }
3905                 print "</td>\n";
3906                 print "<td class=\"link\">";
3907                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3908                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3909                               "blob");
3910                 if ($have_blame) {
3911                         print " | " .
3912                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3913                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3914                                       "blame");
3915                 }
3916                 if (defined $hash_base) {
3917                         print " | " .
3918                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3919                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3920                                       "history");
3921                 }
3922                 print " | " .
3923                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3924                                                file_name=>"$basedir$t->{'name'}")},
3925                                 "raw");
3926                 print "</td>\n";
3927
3928         } elsif ($t->{'type'} eq "tree") {
3929                 print "<td class=\"list\">";
3930                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3931                                              file_name=>"$basedir$t->{'name'}",
3932                                              %base_key)},
3933                               esc_path($t->{'name'}));
3934                 print "</td>\n";
3935                 print "<td class=\"link\">";
3936                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3937                                              file_name=>"$basedir$t->{'name'}",
3938                                              %base_key)},
3939                               "tree");
3940                 if (defined $hash_base) {
3941                         print " | " .
3942                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3943                                                      file_name=>"$basedir$t->{'name'}")},
3944                                       "history");
3945                 }
3946                 print "</td>\n";
3947         } else {
3948                 # unknown object: we can only present history for it
3949                 # (this includes 'commit' object, i.e. submodule support)
3950                 print "<td class=\"list\">" .
3951                       esc_path($t->{'name'}) .
3952                       "</td>\n";
3953                 print "<td class=\"link\">";
3954                 if (defined $hash_base) {
3955                         print $cgi->a({-href => href(action=>"history",
3956                                                      hash_base=>$hash_base,
3957                                                      file_name=>"$basedir$t->{'name'}")},
3958                                       "history");
3959                 }
3960                 print "</td>\n";
3961         }
3962 }
3963
3964 ## ......................................................................
3965 ## functions printing large fragments of HTML
3966
3967 # get pre-image filenames for merge (combined) diff
3968 sub fill_from_file_info {
3969         my ($diff, @parents) = @_;
3970
3971         $diff->{'from_file'} = [ ];
3972         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3973         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3974                 if ($diff->{'status'}[$i] eq 'R' ||
3975                     $diff->{'status'}[$i] eq 'C') {
3976                         $diff->{'from_file'}[$i] =
3977                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3978                 }
3979         }
3980
3981         return $diff;
3982 }
3983
3984 # is current raw difftree line of file deletion
3985 sub is_deleted {
3986         my $diffinfo = shift;
3987
3988         return $diffinfo->{'to_id'} eq ('0' x 40);
3989 }
3990
3991 # does patch correspond to [previous] difftree raw line
3992 # $diffinfo  - hashref of parsed raw diff format
3993 # $patchinfo - hashref of parsed patch diff format
3994 #              (the same keys as in $diffinfo)
3995 sub is_patch_split {
3996         my ($diffinfo, $patchinfo) = @_;
3997
3998         return defined $diffinfo && defined $patchinfo
3999                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4000 }
4001
4002
4003 sub git_difftree_body {
4004         my ($difftree, $hash, @parents) = @_;
4005         my ($parent) = $parents[0];
4006         my $have_blame = gitweb_check_feature('blame');
4007         print "<div class=\"list_head\">\n";
4008         if ($#{$difftree} > 10) {
4009                 print(($#{$difftree} + 1) . " files changed:\n");
4010         }
4011         print "</div>\n";
4012
4013         print "<table class=\"" .
4014               (@parents > 1 ? "combined " : "") .
4015               "diff_tree\">\n";
4016
4017         # header only for combined diff in 'commitdiff' view
4018         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4019         if ($has_header) {
4020                 # table header
4021                 print "<thead><tr>\n" .
4022                        "<th></th><th></th>\n"; # filename, patchN link
4023                 for (my $i = 0; $i < @parents; $i++) {
4024                         my $par = $parents[$i];
4025                         print "<th>" .
4026                               $cgi->a({-href => href(action=>"commitdiff",
4027                                                      hash=>$hash, hash_parent=>$par),
4028                                        -title => 'commitdiff to parent number ' .
4029                                                   ($i+1) . ': ' . substr($par,0,7)},
4030                                       $i+1) .
4031                               "&nbsp;</th>\n";
4032                 }
4033                 print "</tr></thead>\n<tbody>\n";
4034         }
4035
4036         my $alternate = 1;
4037         my $patchno = 0;
4038         foreach my $line (@{$difftree}) {
4039                 my $diff = parsed_difftree_line($line);
4040
4041                 if ($alternate) {
4042                         print "<tr class=\"dark\">\n";
4043                 } else {
4044                         print "<tr class=\"light\">\n";
4045                 }
4046                 $alternate ^= 1;
4047
4048                 if (exists $diff->{'nparents'}) { # combined diff
4049
4050                         fill_from_file_info($diff, @parents)
4051                                 unless exists $diff->{'from_file'};
4052
4053                         if (!is_deleted($diff)) {
4054                                 # file exists in the result (child) commit
4055                                 print "<td>" .
4056                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4057                                                              file_name=>$diff->{'to_file'},
4058                                                              hash_base=>$hash),
4059                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4060                                       "</td>\n";
4061                         } else {
4062                                 print "<td>" .
4063                                       esc_path($diff->{'to_file'}) .
4064                                       "</td>\n";
4065                         }
4066
4067                         if ($action eq 'commitdiff') {
4068                                 # link to patch
4069                                 $patchno++;
4070                                 print "<td class=\"link\">" .
4071                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4072                                       " | " .
4073                                       "</td>\n";
4074                         }
4075
4076                         my $has_history = 0;
4077                         my $not_deleted = 0;
4078                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4079                                 my $hash_parent = $parents[$i];
4080                                 my $from_hash = $diff->{'from_id'}[$i];
4081                                 my $from_path = $diff->{'from_file'}[$i];
4082                                 my $status = $diff->{'status'}[$i];
4083
4084                                 $has_history ||= ($status ne 'A');
4085                                 $not_deleted ||= ($status ne 'D');
4086
4087                                 if ($status eq 'A') {
4088                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4089                                 } elsif ($status eq 'D') {
4090                                         print "<td class=\"link\">" .
4091                                               $cgi->a({-href => href(action=>"blob",
4092                                                                      hash_base=>$hash,
4093                                                                      hash=>$from_hash,
4094                                                                      file_name=>$from_path)},
4095                                                       "blob" . ($i+1)) .
4096                                               " | </td>\n";
4097                                 } else {
4098                                         if ($diff->{'to_id'} eq $from_hash) {
4099                                                 print "<td class=\"link nochange\">";
4100                                         } else {
4101                                                 print "<td class=\"link\">";
4102                                         }
4103                                         print $cgi->a({-href => href(action=>"blobdiff",
4104                                                                      hash=>$diff->{'to_id'},
4105                                                                      hash_parent=>$from_hash,
4106                                                                      hash_base=>$hash,
4107                                                                      hash_parent_base=>$hash_parent,
4108                                                                      file_name=>$diff->{'to_file'},
4109                                                                      file_parent=>$from_path)},
4110                                                       "diff" . ($i+1)) .
4111                                               " | </td>\n";
4112                                 }
4113                         }
4114
4115                         print "<td class=\"link\">";
4116                         if ($not_deleted) {
4117                                 print $cgi->a({-href => href(action=>"blob",
4118                                                              hash=>$diff->{'to_id'},
4119                                                              file_name=>$diff->{'to_file'},
4120                                                              hash_base=>$hash)},
4121                                               "blob");
4122                                 print " | " if ($has_history);
4123                         }
4124                         if ($has_history) {
4125                                 print $cgi->a({-href => href(action=>"history",
4126                                                              file_name=>$diff->{'to_file'},
4127                                                              hash_base=>$hash)},
4128                                               "history");
4129                         }
4130                         print "</td>\n";
4131
4132                         print "</tr>\n";
4133                         next; # instead of 'else' clause, to avoid extra indent
4134                 }
4135                 # else ordinary diff
4136
4137                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4138                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4139                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4140                         $to_mode_oct = oct $diff->{'to_mode'};
4141                         if (S_ISREG($to_mode_oct)) { # only for regular file
4142                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4143                         }
4144                         $to_file_type = file_type($diff->{'to_mode'});
4145                 }
4146                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4147                         $from_mode_oct = oct $diff->{'from_mode'};
4148                         if (S_ISREG($to_mode_oct)) { # only for regular file
4149                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4150                         }
4151                         $from_file_type = file_type($diff->{'from_mode'});
4152                 }
4153
4154                 if ($diff->{'status'} eq "A") { # created
4155                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4156                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4157                         $mode_chng   .= "]</span>";
4158                         print "<td>";
4159                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4160                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4161                                       -class => "list"}, esc_path($diff->{'file'}));
4162                         print "</td>\n";
4163                         print "<td>$mode_chng</td>\n";
4164                         print "<td class=\"link\">";
4165                         if ($action eq 'commitdiff') {
4166                                 # link to patch
4167                                 $patchno++;
4168                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4169                                 print " | ";
4170                         }
4171                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4172                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4173                                       "blob");
4174                         print "</td>\n";
4175
4176                 } elsif ($diff->{'status'} eq "D") { # deleted
4177                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4178                         print "<td>";
4179                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4180                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4181                                        -class => "list"}, esc_path($diff->{'file'}));
4182                         print "</td>\n";
4183                         print "<td>$mode_chng</td>\n";
4184                         print "<td class=\"link\">";
4185                         if ($action eq 'commitdiff') {
4186                                 # link to patch
4187                                 $patchno++;
4188                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4189                                 print " | ";
4190                         }
4191                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4192                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4193                                       "blob") . " | ";
4194                         if ($have_blame) {
4195                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4196                                                              file_name=>$diff->{'file'})},
4197                                               "blame") . " | ";
4198                         }
4199                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4200                                                      file_name=>$diff->{'file'})},
4201                                       "history");
4202                         print "</td>\n";
4203
4204                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4205                         my $mode_chnge = "";
4206                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4207                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4208                                 if ($from_file_type ne $to_file_type) {
4209                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4210                                 }
4211                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4212                                         if ($from_mode_str && $to_mode_str) {
4213                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4214                                         } elsif ($to_mode_str) {
4215                                                 $mode_chnge .= " mode: $to_mode_str";
4216                                         }
4217                                 }
4218                                 $mode_chnge .= "]</span>\n";
4219                         }
4220                         print "<td>";
4221                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4222                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4223                                       -class => "list"}, esc_path($diff->{'file'}));
4224                         print "</td>\n";
4225                         print "<td>$mode_chnge</td>\n";
4226                         print "<td class=\"link\">";
4227                         if ($action eq 'commitdiff') {
4228                                 # link to patch
4229                                 $patchno++;
4230                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4231                                       " | ";
4232                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4233                                 # "commit" view and modified file (not onlu mode changed)
4234                                 print $cgi->a({-href => href(action=>"blobdiff",
4235                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4236                                                              hash_base=>$hash, hash_parent_base=>$parent,
4237                                                              file_name=>$diff->{'file'})},
4238                                               "diff") .
4239                                       " | ";
4240                         }
4241                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4242                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4243                                        "blob") . " | ";
4244                         if ($have_blame) {
4245                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4246                                                              file_name=>$diff->{'file'})},
4247                                               "blame") . " | ";
4248                         }
4249                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4250                                                      file_name=>$diff->{'file'})},
4251                                       "history");
4252                         print "</td>\n";
4253
4254                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4255                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4256                         my $nstatus = $status_name{$diff->{'status'}};
4257                         my $mode_chng = "";
4258                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4259                                 # mode also for directories, so we cannot use $to_mode_str
4260                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4261                         }
4262                         print "<td>" .
4263                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4264                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4265                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4266                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4267                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4268                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4269                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4270                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4271                               "<td class=\"link\">";
4272                         if ($action eq 'commitdiff') {
4273                                 # link to patch
4274                                 $patchno++;
4275                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4276                                       " | ";
4277                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4278                                 # "commit" view and modified file (not only pure rename or copy)
4279                                 print $cgi->a({-href => href(action=>"blobdiff",
4280                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4281                                                              hash_base=>$hash, hash_parent_base=>$parent,
4282                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4283                                               "diff") .
4284                                       " | ";
4285                         }
4286                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4287                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4288                                       "blob") . " | ";
4289                         if ($have_blame) {
4290                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4291                                                              file_name=>$diff->{'to_file'})},
4292                                               "blame") . " | ";
4293                         }
4294                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4295                                                     file_name=>$diff->{'to_file'})},
4296                                       "history");
4297                         print "</td>\n";
4298
4299                 } # we should not encounter Unmerged (U) or Unknown (X) status
4300                 print "</tr>\n";
4301         }
4302         print "</tbody>" if $has_header;
4303         print "</table>\n";
4304 }
4305
4306 sub git_patchset_body {
4307         my ($fd, $difftree, $hash, @hash_parents) = @_;
4308         my ($hash_parent) = $hash_parents[0];
4309
4310         my $is_combined = (@hash_parents > 1);
4311         my $patch_idx = 0;
4312         my $patch_number = 0;
4313         my $patch_line;
4314         my $diffinfo;
4315         my $to_name;
4316         my (%from, %to);
4317
4318         print "<div class=\"patchset\">\n";
4319
4320         # skip to first patch
4321         while ($patch_line = <$fd>) {
4322                 chomp $patch_line;
4323
4324                 last if ($patch_line =~ m/^diff /);
4325         }
4326
4327  PATCH:
4328         while ($patch_line) {
4329
4330                 # parse "git diff" header line
4331                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4332                         # $1 is from_name, which we do not use
4333                         $to_name = unquote($2);
4334                         $to_name =~ s!^b/!!;
4335                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4336                         # $1 is 'cc' or 'combined', which we do not use
4337                         $to_name = unquote($2);
4338                 } else {
4339                         $to_name = undef;
4340                 }
4341
4342                 # check if current patch belong to current raw line
4343                 # and parse raw git-diff line if needed
4344                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4345                         # this is continuation of a split patch
4346                         print "<div class=\"patch cont\">\n";
4347                 } else {
4348                         # advance raw git-diff output if needed
4349                         $patch_idx++ if defined $diffinfo;
4350
4351                         # read and prepare patch information
4352                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4353
4354                         # compact combined diff output can have some patches skipped
4355                         # find which patch (using pathname of result) we are at now;
4356                         if ($is_combined) {
4357                                 while ($to_name ne $diffinfo->{'to_file'}) {
4358                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4359                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4360                                               "</div>\n";  # class="patch"
4361
4362                                         $patch_idx++;
4363                                         $patch_number++;
4364
4365                                         last if $patch_idx > $#$difftree;
4366                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4367                                 }
4368                         }
4369
4370                         # modifies %from, %to hashes
4371                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4372
4373                         # this is first patch for raw difftree line with $patch_idx index
4374                         # we index @$difftree array from 0, but number patches from 1
4375                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4376                 }
4377
4378                 # git diff header
4379                 #assert($patch_line =~ m/^diff /) if DEBUG;
4380                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4381                 $patch_number++;
4382                 # print "git diff" header
4383                 print format_git_diff_header_line($patch_line, $diffinfo,
4384                                                   \%from, \%to);
4385
4386                 # print extended diff header
4387                 print "<div class=\"diff extended_header\">\n";
4388         EXTENDED_HEADER:
4389                 while ($patch_line = <$fd>) {
4390                         chomp $patch_line;
4391
4392                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4393
4394                         print format_extended_diff_header_line($patch_line, $diffinfo,
4395                                                                \%from, \%to);
4396                 }
4397                 print "</div>\n"; # class="diff extended_header"
4398
4399                 # from-file/to-file diff header
4400                 if (! $patch_line) {
4401                         print "</div>\n"; # class="patch"
4402                         last PATCH;
4403                 }
4404                 next PATCH if ($patch_line =~ m/^diff /);
4405                 #assert($patch_line =~ m/^---/) if DEBUG;
4406
4407                 my $last_patch_line = $patch_line;
4408                 $patch_line = <$fd>;
4409                 chomp $patch_line;
4410                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4411
4412                 print format_diff_from_to_header($last_patch_line, $patch_line,
4413                                                  $diffinfo, \%from, \%to,
4414                                                  @hash_parents);
4415
4416                 # the patch itself
4417         LINE:
4418                 while ($patch_line = <$fd>) {
4419                         chomp $patch_line;
4420
4421                         next PATCH if ($patch_line =~ m/^diff /);
4422
4423                         print format_diff_line($patch_line, \%from, \%to);
4424                 }
4425
4426         } continue {
4427                 print "</div>\n"; # class="patch"
4428         }
4429
4430         # for compact combined (--cc) format, with chunk and patch simpliciaction
4431         # patchset might be empty, but there might be unprocessed raw lines
4432         for (++$patch_idx if $patch_number > 0;
4433              $patch_idx < @$difftree;
4434              ++$patch_idx) {
4435                 # read and prepare patch information
4436                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4437
4438                 # generate anchor for "patch" links in difftree / whatchanged part
4439                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4440                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4441                       "</div>\n";  # class="patch"
4442
4443                 $patch_number++;
4444         }
4445
4446         if ($patch_number == 0) {
4447                 if (@hash_parents > 1) {
4448                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4449                 } else {
4450                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4451                 }
4452         }
4453
4454         print "</div>\n"; # class="patchset"
4455 }
4456
4457 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4458
4459 # fills project list info (age, description, owner, forks) for each
4460 # project in the list, removing invalid projects from returned list
4461 # NOTE: modifies $projlist, but does not remove entries from it
4462 sub fill_project_list_info {
4463         my ($projlist, $check_forks) = @_;
4464         my @projects;
4465
4466         my $show_ctags = gitweb_check_feature('ctags');
4467  PROJECT:
4468         foreach my $pr (@$projlist) {
4469                 my (@activity) = git_get_last_activity($pr->{'path'});
4470                 unless (@activity) {
4471                         next PROJECT;
4472                 }
4473                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4474                 if (!defined $pr->{'descr'}) {
4475                         my $descr = git_get_project_description($pr->{'path'}) || "";
4476                         $descr = to_utf8($descr);
4477                         $pr->{'descr_long'} = $descr;
4478                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4479                 }
4480                 if (!defined $pr->{'owner'}) {
4481                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4482                 }
4483                 if ($check_forks) {
4484                         my $pname = $pr->{'path'};
4485                         if (($pname =~ s/\.git$//) &&
4486                             ($pname !~ /\/$/) &&
4487                             (-d "$projectroot/$pname")) {
4488                                 $pr->{'forks'} = "-d $projectroot/$pname";
4489                         } else {
4490                                 $pr->{'forks'} = 0;
4491                         }
4492                 }
4493                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4494                 push @projects, $pr;
4495         }
4496
4497         return @projects;
4498 }
4499
4500 # print 'sort by' <th> element, generating 'sort by $name' replay link
4501 # if that order is not selected
4502 sub print_sort_th {
4503         print format_sort_th(@_);
4504 }
4505
4506 sub format_sort_th {
4507         my ($name, $order, $header) = @_;
4508         my $sort_th = "";
4509         $header ||= ucfirst($name);
4510
4511         if ($order eq $name) {
4512                 $sort_th .= "<th>$header</th>\n";
4513         } else {
4514                 $sort_th .= "<th>" .
4515                             $cgi->a({-href => href(-replay=>1, order=>$name),
4516                                      -class => "header"}, $header) .
4517                             "</th>\n";
4518         }
4519
4520         return $sort_th;
4521 }
4522
4523 sub git_project_list_body {
4524         # actually uses global variable $project
4525         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4526
4527         my $check_forks = gitweb_check_feature('forks');
4528         my @projects = fill_project_list_info($projlist, $check_forks);
4529
4530         $order ||= $default_projects_order;
4531         $from = 0 unless defined $from;
4532         $to = $#projects if (!defined $to || $#projects < $to);
4533
4534         my %order_info = (
4535                 project => { key => 'path', type => 'str' },
4536                 descr => { key => 'descr_long', type => 'str' },
4537                 owner => { key => 'owner', type => 'str' },
4538                 age => { key => 'age', type => 'num' }
4539         );
4540         my $oi = $order_info{$order};
4541         if ($oi->{'type'} eq 'str') {
4542                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4543         } else {
4544                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4545         }
4546
4547         my $show_ctags = gitweb_check_feature('ctags');
4548         if ($show_ctags) {
4549                 my %ctags;
4550                 foreach my $p (@projects) {
4551                         foreach my $ct (keys %{$p->{'ctags'}}) {
4552                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4553                         }
4554                 }
4555                 my $cloud = git_populate_project_tagcloud(\%ctags);
4556                 print git_show_project_tagcloud($cloud, 64);
4557         }
4558
4559         print "<table class=\"project_list\">\n";
4560         unless ($no_header) {
4561                 print "<tr>\n";
4562                 if ($check_forks) {
4563                         print "<th></th>\n";
4564                 }
4565                 print_sort_th('project', $order, 'Project');
4566                 print_sort_th('descr', $order, 'Description');
4567                 print_sort_th('owner', $order, 'Owner');
4568                 print_sort_th('age', $order, 'Last Change');
4569                 print "<th></th>\n" . # for links
4570                       "</tr>\n";
4571         }
4572         my $alternate = 1;
4573         my $tagfilter = $cgi->param('by_tag');
4574         for (my $i = $from; $i <= $to; $i++) {
4575                 my $pr = $projects[$i];
4576
4577                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4578                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4579                         and not $pr->{'descr_long'} =~ /$searchtext/;
4580                 # Weed out forks or non-matching entries of search
4581                 if ($check_forks) {
4582                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4583                         $forkbase="^$forkbase" if $forkbase;
4584                         next if not $searchtext and not $tagfilter and $show_ctags
4585                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4586                 }
4587
4588                 if ($alternate) {
4589                         print "<tr class=\"dark\">\n";
4590                 } else {
4591                         print "<tr class=\"light\">\n";
4592                 }
4593                 $alternate ^= 1;
4594                 if ($check_forks) {
4595                         print "<td>";
4596                         if ($pr->{'forks'}) {
4597                                 print "<!-- $pr->{'forks'} -->\n";
4598                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4599                         }
4600                         print "</td>\n";
4601                 }
4602                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4603                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4604                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4605                                         -class => "list", -title => $pr->{'descr_long'}},
4606                                         esc_html($pr->{'descr'})) . "</td>\n" .
4607                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4608                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4609                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4610                       "<td class=\"link\">" .
4611                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4612                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4613                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4614                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4615                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4616                       "</td>\n" .
4617                       "</tr>\n";
4618         }
4619         if (defined $extra) {
4620                 print "<tr>\n";
4621                 if ($check_forks) {
4622                         print "<td></td>\n";
4623                 }
4624                 print "<td colspan=\"5\">$extra</td>\n" .
4625                       "</tr>\n";
4626         }
4627         print "</table>\n";
4628 }
4629
4630 sub git_log_body {
4631         # uses global variable $project
4632         my ($commitlist, $from, $to, $refs, $extra) = @_;
4633
4634         $from = 0 unless defined $from;
4635         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4636
4637         for (my $i = 0; $i <= $to; $i++) {
4638                 my %co = %{$commitlist->[$i]};
4639                 next if !%co;
4640                 my $commit = $co{'id'};
4641                 my $ref = format_ref_marker($refs, $commit);
4642                 my %ad = parse_date($co{'author_epoch'});
4643                 git_print_header_div('commit',
4644                                "<span class=\"age\">$co{'age_string'}</span>" .
4645                                esc_html($co{'title'}) . $ref,
4646                                $commit);
4647                 print "<div class=\"title_text\">\n" .
4648                       "<div class=\"log_link\">\n" .
4649                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4650                       " | " .
4651                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4652                       " | " .
4653                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4654                       "<br/>\n" .
4655                       "</div>\n";
4656                       git_print_authorship(\%co, -tag => 'span');
4657                       print "<br/>\n</div>\n";
4658
4659                 print "<div class=\"log_body\">\n";
4660                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4661                 print "</div>\n";
4662         }
4663         if ($extra) {
4664                 print "<div class=\"page_nav\">\n";
4665                 print "$extra\n";
4666                 print "</div>\n";
4667         }
4668 }
4669
4670 sub git_shortlog_body {
4671         # uses global variable $project
4672         my ($commitlist, $from, $to, $refs, $extra) = @_;
4673
4674         $from = 0 unless defined $from;
4675         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4676
4677         print "<table class=\"shortlog\">\n";
4678         my $alternate = 1;
4679         for (my $i = $from; $i <= $to; $i++) {
4680                 my %co = %{$commitlist->[$i]};
4681                 my $commit = $co{'id'};
4682                 my $ref = format_ref_marker($refs, $commit);
4683                 if ($alternate) {
4684                         print "<tr class=\"dark\">\n";
4685                 } else {
4686                         print "<tr class=\"light\">\n";
4687                 }
4688                 $alternate ^= 1;
4689                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4690                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4691                       format_author_html('td', \%co, 10) . "<td>";
4692                 print format_subject_html($co{'title'}, $co{'title_short'},
4693                                           href(action=>"commit", hash=>$commit), $ref);
4694                 print "</td>\n" .
4695                       "<td class=\"link\">" .
4696                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4697                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4698                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4699                 my $snapshot_links = format_snapshot_links($commit);
4700                 if (defined $snapshot_links) {
4701                         print " | " . $snapshot_links;
4702                 }
4703                 print "</td>\n" .
4704                       "</tr>\n";
4705         }
4706         if (defined $extra) {
4707                 print "<tr>\n" .
4708                       "<td colspan=\"4\">$extra</td>\n" .
4709                       "</tr>\n";
4710         }
4711         print "</table>\n";
4712 }
4713
4714 sub git_history_body {
4715         # Warning: assumes constant type (blob or tree) during history
4716         my ($commitlist, $from, $to, $refs, $extra,
4717             $file_name, $file_hash, $ftype) = @_;
4718
4719         $from = 0 unless defined $from;
4720         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4721
4722         print "<table class=\"history\">\n";
4723         my $alternate = 1;
4724         for (my $i = $from; $i <= $to; $i++) {
4725                 my %co = %{$commitlist->[$i]};
4726                 if (!%co) {
4727                         next;
4728                 }
4729                 my $commit = $co{'id'};
4730
4731                 my $ref = format_ref_marker($refs, $commit);
4732
4733                 if ($alternate) {
4734                         print "<tr class=\"dark\">\n";
4735                 } else {
4736                         print "<tr class=\"light\">\n";
4737                 }
4738                 $alternate ^= 1;
4739                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4740         # shortlog:   format_author_html('td', \%co, 10)
4741                       format_author_html('td', \%co, 15, 3) . "<td>";
4742                 # originally git_history used chop_str($co{'title'}, 50)
4743                 print format_subject_html($co{'title'}, $co{'title_short'},
4744                                           href(action=>"commit", hash=>$commit), $ref);
4745                 print "</td>\n" .
4746                       "<td class=\"link\">" .
4747                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4748                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4749
4750                 if ($ftype eq 'blob') {
4751                         my $blob_current = $file_hash;
4752                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4753                         if (defined $blob_current && defined $blob_parent &&
4754                                         $blob_current ne $blob_parent) {
4755                                 print " | " .
4756                                         $cgi->a({-href => href(action=>"blobdiff",
4757                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4758                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4759                                                                file_name=>$file_name)},
4760                                                 "diff to current");
4761                         }
4762                 }
4763                 print "</td>\n" .
4764                       "</tr>\n";
4765         }
4766         if (defined $extra) {
4767                 print "<tr>\n" .
4768                       "<td colspan=\"4\">$extra</td>\n" .
4769                       "</tr>\n";
4770         }
4771         print "</table>\n";
4772 }
4773
4774 sub git_tags_body {
4775         # uses global variable $project
4776         my ($taglist, $from, $to, $extra) = @_;
4777         $from = 0 unless defined $from;
4778         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4779
4780         print "<table class=\"tags\">\n";
4781         my $alternate = 1;
4782         for (my $i = $from; $i <= $to; $i++) {
4783                 my $entry = $taglist->[$i];
4784                 my %tag = %$entry;
4785                 my $comment = $tag{'subject'};
4786                 my $comment_short;
4787                 if (defined $comment) {
4788                         $comment_short = chop_str($comment, 30, 5);
4789                 }
4790                 if ($alternate) {
4791                         print "<tr class=\"dark\">\n";
4792                 } else {
4793                         print "<tr class=\"light\">\n";
4794                 }
4795                 $alternate ^= 1;
4796                 if (defined $tag{'age'}) {
4797                         print "<td><i>$tag{'age'}</i></td>\n";
4798                 } else {
4799                         print "<td></td>\n";
4800                 }
4801                 print "<td>" .
4802                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4803                                -class => "list name"}, esc_html($tag{'name'})) .
4804                       "</td>\n" .
4805                       "<td>";
4806                 if (defined $comment) {
4807                         print format_subject_html($comment, $comment_short,
4808                                                   href(action=>"tag", hash=>$tag{'id'}));
4809                 }
4810                 print "</td>\n" .
4811                       "<td class=\"selflink\">";
4812                 if ($tag{'type'} eq "tag") {
4813                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4814                 } else {
4815                         print "&nbsp;";
4816                 }
4817                 print "</td>\n" .
4818                       "<td class=\"link\">" . " | " .
4819                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4820                 if ($tag{'reftype'} eq "commit") {
4821                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4822                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4823                 } elsif ($tag{'reftype'} eq "blob") {
4824                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4825                 }
4826                 print "</td>\n" .
4827                       "</tr>";
4828         }
4829         if (defined $extra) {
4830                 print "<tr>\n" .
4831                       "<td colspan=\"5\">$extra</td>\n" .
4832                       "</tr>\n";
4833         }
4834         print "</table>\n";
4835 }
4836
4837 sub git_heads_body {
4838         # uses global variable $project
4839         my ($headlist, $head, $from, $to, $extra) = @_;
4840         $from = 0 unless defined $from;
4841         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4842
4843         print "<table class=\"heads\">\n";
4844         my $alternate = 1;
4845         for (my $i = $from; $i <= $to; $i++) {
4846                 my $entry = $headlist->[$i];
4847                 my %ref = %$entry;
4848                 my $curr = $ref{'id'} eq $head;
4849                 if ($alternate) {
4850                         print "<tr class=\"dark\">\n";
4851                 } else {
4852                         print "<tr class=\"light\">\n";
4853                 }
4854                 $alternate ^= 1;
4855                 print "<td><i>$ref{'age'}</i></td>\n" .
4856                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4857                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4858                                -class => "list name"},esc_html($ref{'name'})) .
4859                       "</td>\n" .
4860                       "<td class=\"link\">" .
4861                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4862                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4863                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4864                       "</td>\n" .
4865                       "</tr>";
4866         }
4867         if (defined $extra) {
4868                 print "<tr>\n" .
4869                       "<td colspan=\"3\">$extra</td>\n" .
4870                       "</tr>\n";
4871         }
4872         print "</table>\n";
4873 }
4874
4875 sub git_search_grep_body {
4876         my ($commitlist, $from, $to, $extra) = @_;
4877         $from = 0 unless defined $from;
4878         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4879
4880         print "<table class=\"commit_search\">\n";
4881         my $alternate = 1;
4882         for (my $i = $from; $i <= $to; $i++) {
4883                 my %co = %{$commitlist->[$i]};
4884                 if (!%co) {
4885                         next;
4886                 }
4887                 my $commit = $co{'id'};
4888                 if ($alternate) {
4889                         print "<tr class=\"dark\">\n";
4890                 } else {
4891                         print "<tr class=\"light\">\n";
4892                 }
4893                 $alternate ^= 1;
4894                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4895                       format_author_html('td', \%co, 15, 5) .
4896                       "<td>" .
4897                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4898                                -class => "list subject"},
4899                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4900                 my $comment = $co{'comment'};
4901                 foreach my $line (@$comment) {
4902                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4903                                 my ($lead, $match, $trail) = ($1, $2, $3);
4904                                 $match = chop_str($match, 70, 5, 'center');
4905                                 my $contextlen = int((80 - length($match))/2);
4906                                 $contextlen = 30 if ($contextlen > 30);
4907                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4908                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4909
4910                                 $lead  = esc_html($lead);
4911                                 $match = esc_html($match);
4912                                 $trail = esc_html($trail);
4913
4914                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4915                         }
4916                 }
4917                 print "</td>\n" .
4918                       "<td class=\"link\">" .
4919                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4920                       " | " .
4921                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4922                       " | " .
4923                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4924                 print "</td>\n" .
4925                       "</tr>\n";
4926         }
4927         if (defined $extra) {
4928                 print "<tr>\n" .
4929                       "<td colspan=\"3\">$extra</td>\n" .
4930                       "</tr>\n";
4931         }
4932         print "</table>\n";
4933 }
4934
4935 ## ======================================================================
4936 ## ======================================================================
4937 ## actions
4938
4939 sub git_project_list {
4940         my $order = $input_params{'order'};
4941         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4942                 die_error(400, "Unknown order parameter");
4943         }
4944
4945         my @list = git_get_projects_list();
4946         if (!@list) {
4947                 die_error(404, "No projects found");
4948         }
4949
4950         git_header_html();
4951         if (defined $home_text && -f $home_text) {
4952                 print "<div class=\"index_include\">\n";
4953                 insert_file($home_text);
4954                 print "</div>\n";
4955         }
4956         print $cgi->startform(-method => "get") .
4957               "<p class=\"projsearch\">Search:\n" .
4958               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4959               "</p>" .
4960               $cgi->end_form() . "\n";
4961         git_project_list_body(\@list, $order);
4962         git_footer_html();
4963 }
4964
4965 sub git_forks {
4966         my $order = $input_params{'order'};
4967         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4968                 die_error(400, "Unknown order parameter");
4969         }
4970
4971         my @list = git_get_projects_list($project);
4972         if (!@list) {
4973                 die_error(404, "No forks found");
4974         }
4975
4976         git_header_html();
4977         git_print_page_nav('','');
4978         git_print_header_div('summary', "$project forks");
4979         git_project_list_body(\@list, $order);
4980         git_footer_html();
4981 }
4982
4983 sub git_project_index {
4984         my @projects = git_get_projects_list($project);
4985
4986         print $cgi->header(
4987                 -type => 'text/plain',
4988                 -charset => 'utf-8',
4989                 -content_disposition => 'inline; filename="index.aux"');
4990
4991         foreach my $pr (@projects) {
4992                 if (!exists $pr->{'owner'}) {
4993                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4994                 }
4995
4996                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4997                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4998                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4999                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5000                 $path  =~ s/ /\+/g;
5001                 $owner =~ s/ /\+/g;
5002
5003                 print "$path $owner\n";
5004         }
5005 }
5006
5007 sub git_summary {
5008         my $descr = git_get_project_description($project) || "none";
5009         my %co = parse_commit("HEAD");
5010         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5011         my $head = $co{'id'};
5012
5013         my $owner = git_get_project_owner($project);
5014
5015         my $refs = git_get_references();
5016         # These get_*_list functions return one more to allow us to see if
5017         # there are more ...
5018         my @taglist  = git_get_tags_list(16);
5019         my @headlist = git_get_heads_list(16);
5020         my @forklist;
5021         my $check_forks = gitweb_check_feature('forks');
5022
5023         if ($check_forks) {
5024                 @forklist = git_get_projects_list($project);
5025         }
5026
5027         git_header_html();
5028         git_print_page_nav('summary','', $head);
5029
5030         print "<div class=\"title\">&nbsp;</div>\n";
5031         print "<table class=\"projects_list\">\n" .
5032               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5033               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5034         if (defined $cd{'rfc2822'}) {
5035                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5036         }
5037
5038         # use per project git URL list in $projectroot/$project/cloneurl
5039         # or make project git URL from git base URL and project name
5040         my $url_tag = "URL";
5041         my @url_list = git_get_project_url_list($project);
5042         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5043         foreach my $git_url (@url_list) {
5044                 next unless $git_url;
5045                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5046                 $url_tag = "";
5047         }
5048
5049         # Tag cloud
5050         my $show_ctags = gitweb_check_feature('ctags');
5051         if ($show_ctags) {
5052                 my $ctags = git_get_project_ctags($project);
5053                 my $cloud = git_populate_project_tagcloud($ctags);
5054                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5055                 print "</td>\n<td>" unless %$ctags;
5056                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5057                 print "</td>\n<td>" if %$ctags;
5058                 print git_show_project_tagcloud($cloud, 48);
5059                 print "</td></tr>";
5060         }
5061
5062         print "</table>\n";
5063
5064         # If XSS prevention is on, we don't include README.html.
5065         # TODO: Allow a readme in some safe format.
5066         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5067                 print "<div class=\"title\">readme</div>\n" .
5068                       "<div class=\"readme\">\n";
5069                 insert_file("$projectroot/$project/README.html");
5070                 print "\n</div>\n"; # class="readme"
5071         }
5072
5073         # we need to request one more than 16 (0..15) to check if
5074         # those 16 are all
5075         my @commitlist = $head ? parse_commits($head, 17) : ();
5076         if (@commitlist) {
5077                 git_print_header_div('shortlog');
5078                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5079                                   $#commitlist <=  15 ? undef :
5080                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5081         }
5082
5083         if (@taglist) {
5084                 git_print_header_div('tags');
5085                 git_tags_body(\@taglist, 0, 15,
5086                               $#taglist <=  15 ? undef :
5087                               $cgi->a({-href => href(action=>"tags")}, "..."));
5088         }
5089
5090         if (@headlist) {
5091                 git_print_header_div('heads');
5092                 git_heads_body(\@headlist, $head, 0, 15,
5093                                $#headlist <= 15 ? undef :
5094                                $cgi->a({-href => href(action=>"heads")}, "..."));
5095         }
5096
5097         if (@forklist) {
5098                 git_print_header_div('forks');
5099                 git_project_list_body(\@forklist, 'age', 0, 15,
5100                                       $#forklist <= 15 ? undef :
5101                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5102                                       'no_header');
5103         }
5104
5105         git_footer_html();
5106 }
5107
5108 sub git_tag {
5109         my $head = git_get_head_hash($project);
5110         git_header_html();
5111         git_print_page_nav('','', $head,undef,$head);
5112         my %tag = parse_tag($hash);
5113
5114         if (! %tag) {
5115                 die_error(404, "Unknown tag object");
5116         }
5117
5118         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5119         print "<div class=\"title_text\">\n" .
5120               "<table class=\"object_header\">\n" .
5121               "<tr>\n" .
5122               "<td>object</td>\n" .
5123               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5124                                $tag{'object'}) . "</td>\n" .
5125               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5126                                               $tag{'type'}) . "</td>\n" .
5127               "</tr>\n";
5128         if (defined($tag{'author'})) {
5129                 git_print_authorship_rows(\%tag, 'author');
5130         }
5131         print "</table>\n\n" .
5132               "</div>\n";
5133         print "<div class=\"page_body\">";
5134         my $comment = $tag{'comment'};
5135         foreach my $line (@$comment) {
5136                 chomp $line;
5137                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5138         }
5139         print "</div>\n";
5140         git_footer_html();
5141 }
5142
5143 sub git_blame_common {
5144         my $format = shift || 'porcelain';
5145         if ($format eq 'porcelain' && $cgi->param('js')) {
5146                 $format = 'incremental';
5147                 $action = 'blame_incremental'; # for page title etc
5148         }
5149
5150         # permissions
5151         gitweb_check_feature('blame')
5152                 or die_error(403, "Blame view not allowed");
5153
5154         # error checking
5155         die_error(400, "No file name given") unless $file_name;
5156         $hash_base ||= git_get_head_hash($project);
5157         die_error(404, "Couldn't find base commit") unless $hash_base;
5158         my %co = parse_commit($hash_base)
5159                 or die_error(404, "Commit not found");
5160         my $ftype = "blob";
5161         if (!defined $hash) {
5162                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5163                         or die_error(404, "Error looking up file");
5164         } else {
5165                 $ftype = git_get_type($hash);
5166                 if ($ftype !~ "blob") {
5167                         die_error(400, "Object is not a blob");
5168                 }
5169         }
5170
5171         my $fd;
5172         if ($format eq 'incremental') {
5173                 # get file contents (as base)
5174                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5175                         or die_error(500, "Open git-cat-file failed");
5176         } elsif ($format eq 'data') {
5177                 # run git-blame --incremental
5178                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5179                         $hash_base, "--", $file_name
5180                         or die_error(500, "Open git-blame --incremental failed");
5181         } else {
5182                 # run git-blame --porcelain
5183                 open $fd, "-|", git_cmd(), "blame", '-p',
5184                         $hash_base, '--', $file_name
5185                         or die_error(500, "Open git-blame --porcelain failed");
5186         }
5187
5188         # incremental blame data returns early
5189         if ($format eq 'data') {
5190                 print $cgi->header(
5191                         -type=>"text/plain", -charset => "utf-8",
5192                         -status=> "200 OK");
5193                 local $| = 1; # output autoflush
5194                 print while <$fd>;
5195                 close $fd
5196                         or print "ERROR $!\n";
5197
5198                 print 'END';
5199                 if (defined $t0 && gitweb_check_feature('timed')) {
5200                         print ' '.
5201                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5202                               ' '.$number_of_git_cmds;
5203                 }
5204                 print "\n";
5205
5206                 return;
5207         }
5208
5209         # page header
5210         git_header_html();
5211         my $formats_nav =
5212                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5213                         "blob") .
5214                 " | ";
5215         if ($format eq 'incremental') {
5216                 $formats_nav .=
5217                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5218                                 "blame") . " (non-incremental)";
5219         } else {
5220                 $formats_nav .=
5221                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5222                                 "blame") . " (incremental)";
5223         }
5224         $formats_nav .=
5225                 " | " .
5226                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5227                         "history") .
5228                 " | " .
5229                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5230                         "HEAD");
5231         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5232         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5233         git_print_page_path($file_name, $ftype, $hash_base);
5234
5235         # page body
5236         if ($format eq 'incremental') {
5237                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5238                       "This page requires JavaScript to run.\n Use ".
5239                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5240                               'this page').
5241                       " instead.\n".
5242                       "</b></center></div>\n</noscript>\n";
5243
5244                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5245         }
5246
5247         print qq!<div class="page_body">\n!;
5248         print qq!<div id="progress_info">... / ...</div>\n!
5249                 if ($format eq 'incremental');
5250         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5251               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5252               qq!<thead>\n!.
5253               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5254               qq!</thead>\n!.
5255               qq!<tbody>\n!;
5256
5257         my @rev_color = qw(light dark);
5258         my $num_colors = scalar(@rev_color);
5259         my $current_color = 0;
5260
5261         if ($format eq 'incremental') {
5262                 my $color_class = $rev_color[$current_color];
5263
5264                 #contents of a file
5265                 my $linenr = 0;
5266         LINE:
5267                 while (my $line = <$fd>) {
5268                         chomp $line;
5269                         $linenr++;
5270
5271                         print qq!<tr id="l$linenr" class="$color_class">!.
5272                               qq!<td class="sha1"><a href=""> </a></td>!.
5273                               qq!<td class="linenr">!.
5274                               qq!<a class="linenr" href="">$linenr</a></td>!;
5275                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5276                         print qq!</tr>\n!;
5277                 }
5278
5279         } else { # porcelain, i.e. ordinary blame
5280                 my %metainfo = (); # saves information about commits
5281
5282                 # blame data
5283         LINE:
5284                 while (my $line = <$fd>) {
5285                         chomp $line;
5286                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5287                         # no <lines in group> for subsequent lines in group of lines
5288                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5289                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5290                         if (!exists $metainfo{$full_rev}) {
5291                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5292                         }
5293                         my $meta = $metainfo{$full_rev};
5294                         my $data;
5295                         while ($data = <$fd>) {
5296                                 chomp $data;
5297                                 last if ($data =~ s/^\t//); # contents of line
5298                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5299                                         $meta->{$1} = $2 unless exists $meta->{$1};
5300                                 }
5301                                 if ($data =~ /^previous /) {
5302                                         $meta->{'nprevious'}++;
5303                                 }
5304                         }
5305                         my $short_rev = substr($full_rev, 0, 8);
5306                         my $author = $meta->{'author'};
5307                         my %date =
5308                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5309                         my $date = $date{'iso-tz'};
5310                         if ($group_size) {
5311                                 $current_color = ($current_color + 1) % $num_colors;
5312                         }
5313                         my $tr_class = $rev_color[$current_color];
5314                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5315                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5316                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5317                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5318                         if ($group_size) {
5319                                 print "<td class=\"sha1\"";
5320                                 print " title=\"". esc_html($author) . ", $date\"";
5321                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5322                                 print ">";
5323                                 print $cgi->a({-href => href(action=>"commit",
5324                                                              hash=>$full_rev,
5325                                                              file_name=>$file_name)},
5326                                               esc_html($short_rev));
5327                                 if ($group_size >= 2) {
5328                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5329                                         if (@author_initials) {
5330                                                 print "<br />" .
5331                                                       esc_html(join('', @author_initials));
5332                                                 #           or join('.', ...)
5333                                         }
5334                                 }
5335                                 print "</td>\n";
5336                         }
5337                         # 'previous' <sha1 of parent commit> <filename at commit>
5338                         if (exists $meta->{'previous'} &&
5339                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5340                                 $meta->{'parent'} = $1;
5341                                 $meta->{'file_parent'} = unquote($2);
5342                         }
5343                         my $linenr_commit =
5344                                 exists($meta->{'parent'}) ?
5345                                 $meta->{'parent'} : $full_rev;
5346                         my $linenr_filename =
5347                                 exists($meta->{'file_parent'}) ?
5348                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5349                         my $blamed = href(action => 'blame',
5350                                           file_name => $linenr_filename,
5351                                           hash_base => $linenr_commit);
5352                         print "<td class=\"linenr\">";
5353                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5354                                         -class => "linenr" },
5355                                       esc_html($lineno));
5356                         print "</td>";
5357                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5358                         print "</tr>\n";
5359                 } # end while
5360
5361         }
5362
5363         # footer
5364         print "</tbody>\n".
5365               "</table>\n"; # class="blame"
5366         print "</div>\n";   # class="blame_body"
5367         close $fd
5368                 or print "Reading blob failed\n";
5369
5370         git_footer_html();
5371 }
5372
5373 sub git_blame {
5374         git_blame_common();
5375 }
5376
5377 sub git_blame_incremental {
5378         git_blame_common('incremental');
5379 }
5380
5381 sub git_blame_data {
5382         git_blame_common('data');
5383 }
5384
5385 sub git_tags {
5386         my $head = git_get_head_hash($project);
5387         git_header_html();
5388         git_print_page_nav('','', $head,undef,$head);
5389         git_print_header_div('summary', $project);
5390
5391         my @tagslist = git_get_tags_list();
5392         if (@tagslist) {
5393                 git_tags_body(\@tagslist);
5394         }
5395         git_footer_html();
5396 }
5397
5398 sub git_heads {
5399         my $head = git_get_head_hash($project);
5400         git_header_html();
5401         git_print_page_nav('','', $head,undef,$head);
5402         git_print_header_div('summary', $project);
5403
5404         my @headslist = git_get_heads_list();
5405         if (@headslist) {
5406                 git_heads_body(\@headslist, $head);
5407         }
5408         git_footer_html();
5409 }
5410
5411 sub git_blob_plain {
5412         my $type = shift;
5413         my $expires;
5414
5415         if (!defined $hash) {
5416                 if (defined $file_name) {
5417                         my $base = $hash_base || git_get_head_hash($project);
5418                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5419                                 or die_error(404, "Cannot find file");
5420                 } else {
5421                         die_error(400, "No file name defined");
5422                 }
5423         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5424                 # blobs defined by non-textual hash id's can be cached
5425                 $expires = "+1d";
5426         }
5427
5428         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5429                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5430
5431         # content-type (can include charset)
5432         $type = blob_contenttype($fd, $file_name, $type);
5433
5434         # "save as" filename, even when no $file_name is given
5435         my $save_as = "$hash";
5436         if (defined $file_name) {
5437                 $save_as = $file_name;
5438         } elsif ($type =~ m/^text\//) {
5439                 $save_as .= '.txt';
5440         }
5441
5442         # With XSS prevention on, blobs of all types except a few known safe
5443         # ones are served with "Content-Disposition: attachment" to make sure
5444         # they don't run in our security domain.  For certain image types,
5445         # blob view writes an <img> tag referring to blob_plain view, and we
5446         # want to be sure not to break that by serving the image as an
5447         # attachment (though Firefox 3 doesn't seem to care).
5448         my $sandbox = $prevent_xss &&
5449                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5450
5451         print $cgi->header(
5452                 -type => $type,
5453                 -expires => $expires,
5454                 -content_disposition =>
5455                         ($sandbox ? 'attachment' : 'inline')
5456                         . '; filename="' . $save_as . '"');
5457         local $/ = undef;
5458         binmode STDOUT, ':raw';
5459         print <$fd>;
5460         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5461         close $fd;
5462 }
5463
5464 sub git_blob {
5465         my $expires;
5466
5467         if (!defined $hash) {
5468                 if (defined $file_name) {
5469                         my $base = $hash_base || git_get_head_hash($project);
5470                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5471                                 or die_error(404, "Cannot find file");
5472                 } else {
5473                         die_error(400, "No file name defined");
5474                 }
5475         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5476                 # blobs defined by non-textual hash id's can be cached
5477                 $expires = "+1d";
5478         }
5479
5480         my $have_blame = gitweb_check_feature('blame');
5481         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5482                 or die_error(500, "Couldn't cat $file_name, $hash");
5483         my $mimetype = blob_mimetype($fd, $file_name);
5484         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5485                 close $fd;
5486                 return git_blob_plain($mimetype);
5487         }
5488         # we can have blame only for text/* mimetype
5489         $have_blame &&= ($mimetype =~ m!^text/!);
5490
5491         git_header_html(undef, $expires);
5492         my $formats_nav = '';
5493         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5494                 if (defined $file_name) {
5495                         if ($have_blame) {
5496                                 $formats_nav .=
5497                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5498                                                 "blame") .
5499                                         " | ";
5500                         }
5501                         $formats_nav .=
5502                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5503                                         "history") .
5504                                 " | " .
5505                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5506                                         "raw") .
5507                                 " | " .
5508                                 $cgi->a({-href => href(action=>"blob",
5509                                                        hash_base=>"HEAD", file_name=>$file_name)},
5510                                         "HEAD");
5511                 } else {
5512                         $formats_nav .=
5513                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5514                                         "raw");
5515                 }
5516                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5517                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5518         } else {
5519                 print "<div class=\"page_nav\">\n" .
5520                       "<br/><br/></div>\n" .
5521                       "<div class=\"title\">$hash</div>\n";
5522         }
5523         git_print_page_path($file_name, "blob", $hash_base);
5524         print "<div class=\"page_body\">\n";
5525         if ($mimetype =~ m!^image/!) {
5526                 print qq!<img type="$mimetype"!;
5527                 if ($file_name) {
5528                         print qq! alt="$file_name" title="$file_name"!;
5529                 }
5530                 print qq! src="! .
5531                       href(action=>"blob_plain", hash=>$hash,
5532                            hash_base=>$hash_base, file_name=>$file_name) .
5533                       qq!" />\n!;
5534         } else {
5535                 my $nr;
5536                 while (my $line = <$fd>) {
5537                         chomp $line;
5538                         $nr++;
5539                         $line = untabify($line);
5540                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5541                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5542                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5543                 }
5544         }
5545         close $fd
5546                 or print "Reading blob failed.\n";
5547         print "</div>";
5548         git_footer_html();
5549 }
5550
5551 sub git_tree {
5552         if (!defined $hash_base) {
5553                 $hash_base = "HEAD";
5554         }
5555         if (!defined $hash) {
5556                 if (defined $file_name) {
5557                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5558                 } else {
5559                         $hash = $hash_base;
5560                 }
5561         }
5562         die_error(404, "No such tree") unless defined($hash);
5563
5564         my $show_sizes = gitweb_check_feature('show-sizes');
5565         my $have_blame = gitweb_check_feature('blame');
5566
5567         my @entries = ();
5568         {
5569                 local $/ = "\0";
5570                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5571                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5572                         or die_error(500, "Open git-ls-tree failed");
5573                 @entries = map { chomp; $_ } <$fd>;
5574                 close $fd
5575                         or die_error(404, "Reading tree failed");
5576         }
5577
5578         my $refs = git_get_references();
5579         my $ref = format_ref_marker($refs, $hash_base);
5580         git_header_html();
5581         my $basedir = '';
5582         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5583                 my @views_nav = ();
5584                 if (defined $file_name) {
5585                         push @views_nav,
5586                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5587                                         "history"),
5588                                 $cgi->a({-href => href(action=>"tree",
5589                                                        hash_base=>"HEAD", file_name=>$file_name)},
5590                                         "HEAD"),
5591                 }
5592                 my $snapshot_links = format_snapshot_links($hash);
5593                 if (defined $snapshot_links) {
5594                         # FIXME: Should be available when we have no hash base as well.
5595                         push @views_nav, $snapshot_links;
5596                 }
5597                 git_print_page_nav('tree','', $hash_base, undef, undef,
5598                                    join(' | ', @views_nav));
5599                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5600         } else {
5601                 undef $hash_base;
5602                 print "<div class=\"page_nav\">\n";
5603                 print "<br/><br/></div>\n";
5604                 print "<div class=\"title\">$hash</div>\n";
5605         }
5606         if (defined $file_name) {
5607                 $basedir = $file_name;
5608                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5609                         $basedir .= '/';
5610                 }
5611                 git_print_page_path($file_name, 'tree', $hash_base);
5612         }
5613         print "<div class=\"page_body\">\n";
5614         print "<table class=\"tree\">\n";
5615         my $alternate = 1;
5616         # '..' (top directory) link if possible
5617         if (defined $hash_base &&
5618             defined $file_name && $file_name =~ m![^/]+$!) {
5619                 if ($alternate) {
5620                         print "<tr class=\"dark\">\n";
5621                 } else {
5622                         print "<tr class=\"light\">\n";
5623                 }
5624                 $alternate ^= 1;
5625
5626                 my $up = $file_name;
5627                 $up =~ s!/?[^/]+$!!;
5628                 undef $up unless $up;
5629                 # based on git_print_tree_entry
5630                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5631                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5632                 print '<td class="list">';
5633                 print $cgi->a({-href => href(action=>"tree",
5634                                              hash_base=>$hash_base,
5635                                              file_name=>$up)},
5636                               "..");
5637                 print "</td>\n";
5638                 print "<td class=\"link\"></td>\n";
5639
5640                 print "</tr>\n";
5641         }
5642         foreach my $line (@entries) {
5643                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5644
5645                 if ($alternate) {
5646                         print "<tr class=\"dark\">\n";
5647                 } else {
5648                         print "<tr class=\"light\">\n";
5649                 }
5650                 $alternate ^= 1;
5651
5652                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5653
5654                 print "</tr>\n";
5655         }
5656         print "</table>\n" .
5657               "</div>";
5658         git_footer_html();
5659 }
5660
5661 sub snapshot_name {
5662         my ($project, $hash) = @_;
5663
5664         # path/to/project.git  -> project
5665         # path/to/project/.git -> project
5666         my $name = to_utf8($project);
5667         $name =~ s,([^/])/*\.git$,$1,;
5668         $name = basename($name);
5669         # sanitize name
5670         $name =~ s/[[:cntrl:]]/?/g;
5671
5672         my $ver = $hash;
5673         if ($hash =~ /^[0-9a-fA-F]+$/) {
5674                 # shorten SHA-1 hash
5675                 my $full_hash = git_get_full_hash($project, $hash);
5676                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5677                         $ver = git_get_short_hash($project, $hash);
5678                 }
5679         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5680                 # tags don't need shortened SHA-1 hash
5681                 $ver = $1;
5682         } else {
5683                 # branches and other need shortened SHA-1 hash
5684                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5685                         $ver = $1;
5686                 }
5687                 $ver .= '-' . git_get_short_hash($project, $hash);
5688         }
5689         # in case of hierarchical branch names
5690         $ver =~ s!/!.!g;
5691
5692         # name = project-version_string
5693         $name = "$name-$ver";
5694
5695         return wantarray ? ($name, $name) : $name;
5696 }
5697
5698 sub git_snapshot {
5699         my $format = $input_params{'snapshot_format'};
5700         if (!@snapshot_fmts) {
5701                 die_error(403, "Snapshots not allowed");
5702         }
5703         # default to first supported snapshot format
5704         $format ||= $snapshot_fmts[0];
5705         if ($format !~ m/^[a-z0-9]+$/) {
5706                 die_error(400, "Invalid snapshot format parameter");
5707         } elsif (!exists($known_snapshot_formats{$format})) {
5708                 die_error(400, "Unknown snapshot format");
5709         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5710                 die_error(403, "Snapshot format not allowed");
5711         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5712                 die_error(403, "Unsupported snapshot format");
5713         }
5714
5715         my $type = git_get_type("$hash^{}");
5716         if (!$type) {
5717                 die_error(404, 'Object does not exist');
5718         }  elsif ($type eq 'blob') {
5719                 die_error(400, 'Object is not a tree-ish');
5720         }
5721
5722         my ($name, $prefix) = snapshot_name($project, $hash);
5723         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5724         my $cmd = quote_command(
5725                 git_cmd(), 'archive',
5726                 "--format=$known_snapshot_formats{$format}{'format'}",
5727                 "--prefix=$prefix/", $hash);
5728         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5729                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5730         }
5731
5732         $filename =~ s/(["\\])/\\$1/g;
5733         print $cgi->header(
5734                 -type => $known_snapshot_formats{$format}{'type'},
5735                 -content_disposition => 'inline; filename="' . $filename . '"',
5736                 -status => '200 OK');
5737
5738         open my $fd, "-|", $cmd
5739                 or die_error(500, "Execute git-archive failed");
5740         binmode STDOUT, ':raw';
5741         print <$fd>;
5742         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5743         close $fd;
5744 }
5745
5746 sub git_log_generic {
5747         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5748
5749         my $head = git_get_head_hash($project);
5750         if (!defined $base) {
5751                 $base = $head;
5752         }
5753         if (!defined $page) {
5754                 $page = 0;
5755         }
5756         my $refs = git_get_references();
5757
5758         my $commit_hash = $base;
5759         if (defined $parent) {
5760                 $commit_hash = "$parent..$base";
5761         }
5762         my @commitlist =
5763                 parse_commits($commit_hash, 101, (100 * $page),
5764                               defined $file_name ? ($file_name, "--full-history") : ());
5765
5766         my $ftype;
5767         if (!defined $file_hash && defined $file_name) {
5768                 # some commits could have deleted file in question,
5769                 # and not have it in tree, but one of them has to have it
5770                 for (my $i = 0; $i < @commitlist; $i++) {
5771                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5772                         last if defined $file_hash;
5773                 }
5774         }
5775         if (defined $file_hash) {
5776                 $ftype = git_get_type($file_hash);
5777         }
5778         if (defined $file_name && !defined $ftype) {
5779                 die_error(500, "Unknown type of object");
5780         }
5781         my %co;
5782         if (defined $file_name) {
5783                 %co = parse_commit($base)
5784                         or die_error(404, "Unknown commit object");
5785         }
5786
5787
5788         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5789         my $next_link = '';
5790         if ($#commitlist >= 100) {
5791                 $next_link =
5792                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5793                                  -accesskey => "n", -title => "Alt-n"}, "next");
5794         }
5795         my $patch_max = gitweb_get_feature('patches');
5796         if ($patch_max && !defined $file_name) {
5797                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5798                         $paging_nav .= " &sdot; " .
5799                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5800                                         "patches");
5801                 }
5802         }
5803
5804         git_header_html();
5805         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5806         if (defined $file_name) {
5807                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5808         } else {
5809                 git_print_header_div('summary', $project)
5810         }
5811         git_print_page_path($file_name, $ftype, $hash_base)
5812                 if (defined $file_name);
5813
5814         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5815                      $file_name, $file_hash, $ftype);
5816
5817         git_footer_html();
5818 }
5819
5820 sub git_log {
5821         git_log_generic('log', \&git_log_body,
5822                         $hash, $hash_parent);
5823 }
5824
5825 sub git_commit {
5826         $hash ||= $hash_base || "HEAD";
5827         my %co = parse_commit($hash)
5828             or die_error(404, "Unknown commit object");
5829
5830         my $parent  = $co{'parent'};
5831         my $parents = $co{'parents'}; # listref
5832
5833         # we need to prepare $formats_nav before any parameter munging
5834         my $formats_nav;
5835         if (!defined $parent) {
5836                 # --root commitdiff
5837                 $formats_nav .= '(initial)';
5838         } elsif (@$parents == 1) {
5839                 # single parent commit
5840                 $formats_nav .=
5841                         '(parent: ' .
5842                         $cgi->a({-href => href(action=>"commit",
5843                                                hash=>$parent)},
5844                                 esc_html(substr($parent, 0, 7))) .
5845                         ')';
5846         } else {
5847                 # merge commit
5848                 $formats_nav .=
5849                         '(merge: ' .
5850                         join(' ', map {
5851                                 $cgi->a({-href => href(action=>"commit",
5852                                                        hash=>$_)},
5853                                         esc_html(substr($_, 0, 7)));
5854                         } @$parents ) .
5855                         ')';
5856         }
5857         if (gitweb_check_feature('patches') && @$parents <= 1) {
5858                 $formats_nav .= " | " .
5859                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5860                                 "patch");
5861         }
5862
5863         if (!defined $parent) {
5864                 $parent = "--root";
5865         }
5866         my @difftree;
5867         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5868                 @diff_opts,
5869                 (@$parents <= 1 ? $parent : '-c'),
5870                 $hash, "--"
5871                 or die_error(500, "Open git-diff-tree failed");
5872         @difftree = map { chomp; $_ } <$fd>;
5873         close $fd or die_error(404, "Reading git-diff-tree failed");
5874
5875         # non-textual hash id's can be cached
5876         my $expires;
5877         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5878                 $expires = "+1d";
5879         }
5880         my $refs = git_get_references();
5881         my $ref = format_ref_marker($refs, $co{'id'});
5882
5883         git_header_html(undef, $expires);
5884         git_print_page_nav('commit', '',
5885                            $hash, $co{'tree'}, $hash,
5886                            $formats_nav);
5887
5888         if (defined $co{'parent'}) {
5889                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5890         } else {
5891                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5892         }
5893         print "<div class=\"title_text\">\n" .
5894               "<table class=\"object_header\">\n";
5895         git_print_authorship_rows(\%co);
5896         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5897         print "<tr>" .
5898               "<td>tree</td>" .
5899               "<td class=\"sha1\">" .
5900               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5901                        class => "list"}, $co{'tree'}) .
5902               "</td>" .
5903               "<td class=\"link\">" .
5904               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5905                       "tree");
5906         my $snapshot_links = format_snapshot_links($hash);
5907         if (defined $snapshot_links) {
5908                 print " | " . $snapshot_links;
5909         }
5910         print "</td>" .
5911               "</tr>\n";
5912
5913         foreach my $par (@$parents) {
5914                 print "<tr>" .
5915                       "<td>parent</td>" .
5916                       "<td class=\"sha1\">" .
5917                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5918                                class => "list"}, $par) .
5919                       "</td>" .
5920                       "<td class=\"link\">" .
5921                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5922                       " | " .
5923                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5924                       "</td>" .
5925                       "</tr>\n";
5926         }
5927         print "</table>".
5928               "</div>\n";
5929
5930         print "<div class=\"page_body\">\n";
5931         git_print_log($co{'comment'});
5932         print "</div>\n";
5933
5934         git_difftree_body(\@difftree, $hash, @$parents);
5935
5936         git_footer_html();
5937 }
5938
5939 sub git_object {
5940         # object is defined by:
5941         # - hash or hash_base alone
5942         # - hash_base and file_name
5943         my $type;
5944
5945         # - hash or hash_base alone
5946         if ($hash || ($hash_base && !defined $file_name)) {
5947                 my $object_id = $hash || $hash_base;
5948
5949                 open my $fd, "-|", quote_command(
5950                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5951                         or die_error(404, "Object does not exist");
5952                 $type = <$fd>;
5953                 chomp $type;
5954                 close $fd
5955                         or die_error(404, "Object does not exist");
5956
5957         # - hash_base and file_name
5958         } elsif ($hash_base && defined $file_name) {
5959                 $file_name =~ s,/+$,,;
5960
5961                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5962                         or die_error(404, "Base object does not exist");
5963
5964                 # here errors should not hapen
5965                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5966                         or die_error(500, "Open git-ls-tree failed");
5967                 my $line = <$fd>;
5968                 close $fd;
5969
5970                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5971                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5972                         die_error(404, "File or directory for given base does not exist");
5973                 }
5974                 $type = $2;
5975                 $hash = $3;
5976         } else {
5977                 die_error(400, "Not enough information to find object");
5978         }
5979
5980         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5981                                           hash=>$hash, hash_base=>$hash_base,
5982                                           file_name=>$file_name),
5983                              -status => '302 Found');
5984 }
5985
5986 sub git_blobdiff {
5987         my $format = shift || 'html';
5988
5989         my $fd;
5990         my @difftree;
5991         my %diffinfo;
5992         my $expires;
5993
5994         # preparing $fd and %diffinfo for git_patchset_body
5995         # new style URI
5996         if (defined $hash_base && defined $hash_parent_base) {
5997                 if (defined $file_name) {
5998                         # read raw output
5999                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6000                                 $hash_parent_base, $hash_base,
6001                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6002                                 or die_error(500, "Open git-diff-tree failed");
6003                         @difftree = map { chomp; $_ } <$fd>;
6004                         close $fd
6005                                 or die_error(404, "Reading git-diff-tree failed");
6006                         @difftree
6007                                 or die_error(404, "Blob diff not found");
6008
6009                 } elsif (defined $hash &&
6010                          $hash =~ /[0-9a-fA-F]{40}/) {
6011                         # try to find filename from $hash
6012
6013                         # read filtered raw output
6014                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6015                                 $hash_parent_base, $hash_base, "--"
6016                                 or die_error(500, "Open git-diff-tree failed");
6017                         @difftree =
6018                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6019                                 # $hash == to_id
6020                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6021                                 map { chomp; $_ } <$fd>;
6022                         close $fd
6023                                 or die_error(404, "Reading git-diff-tree failed");
6024                         @difftree
6025                                 or die_error(404, "Blob diff not found");
6026
6027                 } else {
6028                         die_error(400, "Missing one of the blob diff parameters");
6029                 }
6030
6031                 if (@difftree > 1) {
6032                         die_error(400, "Ambiguous blob diff specification");
6033                 }
6034
6035                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6036                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6037                 $file_name   ||= $diffinfo{'to_file'};
6038
6039                 $hash_parent ||= $diffinfo{'from_id'};
6040                 $hash        ||= $diffinfo{'to_id'};
6041
6042                 # non-textual hash id's can be cached
6043                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6044                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6045                         $expires = '+1d';
6046                 }
6047
6048                 # open patch output
6049                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6050                         '-p', ($format eq 'html' ? "--full-index" : ()),
6051                         $hash_parent_base, $hash_base,
6052                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6053                         or die_error(500, "Open git-diff-tree failed");
6054         }
6055
6056         # old/legacy style URI -- not generated anymore since 1.4.3.
6057         if (!%diffinfo) {
6058                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6059         }
6060
6061         # header
6062         if ($format eq 'html') {
6063                 my $formats_nav =
6064                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6065                                 "raw");
6066                 git_header_html(undef, $expires);
6067                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6068                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6069                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6070                 } else {
6071                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6072                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6073                 }
6074                 if (defined $file_name) {
6075                         git_print_page_path($file_name, "blob", $hash_base);
6076                 } else {
6077                         print "<div class=\"page_path\"></div>\n";
6078                 }
6079
6080         } elsif ($format eq 'plain') {
6081                 print $cgi->header(
6082                         -type => 'text/plain',
6083                         -charset => 'utf-8',
6084                         -expires => $expires,
6085                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6086
6087                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6088
6089         } else {
6090                 die_error(400, "Unknown blobdiff format");
6091         }
6092
6093         # patch
6094         if ($format eq 'html') {
6095                 print "<div class=\"page_body\">\n";
6096
6097                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6098                 close $fd;
6099
6100                 print "</div>\n"; # class="page_body"
6101                 git_footer_html();
6102
6103         } else {
6104                 while (my $line = <$fd>) {
6105                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6106                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6107
6108                         print $line;
6109
6110                         last if $line =~ m!^\+\+\+!;
6111                 }
6112                 local $/ = undef;
6113                 print <$fd>;
6114                 close $fd;
6115         }
6116 }
6117
6118 sub git_blobdiff_plain {
6119         git_blobdiff('plain');
6120 }
6121
6122 sub git_commitdiff {
6123         my %params = @_;
6124         my $format = $params{-format} || 'html';
6125
6126         my ($patch_max) = gitweb_get_feature('patches');
6127         if ($format eq 'patch') {
6128                 die_error(403, "Patch view not allowed") unless $patch_max;
6129         }
6130
6131         $hash ||= $hash_base || "HEAD";
6132         my %co = parse_commit($hash)
6133             or die_error(404, "Unknown commit object");
6134
6135         # choose format for commitdiff for merge
6136         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6137                 $hash_parent = '--cc';
6138         }
6139         # we need to prepare $formats_nav before almost any parameter munging
6140         my $formats_nav;
6141         if ($format eq 'html') {
6142                 $formats_nav =
6143                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6144                                 "raw");
6145                 if ($patch_max && @{$co{'parents'}} <= 1) {
6146                         $formats_nav .= " | " .
6147                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6148                                         "patch");
6149                 }
6150
6151                 if (defined $hash_parent &&
6152                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6153                         # commitdiff with two commits given
6154                         my $hash_parent_short = $hash_parent;
6155                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6156                                 $hash_parent_short = substr($hash_parent, 0, 7);
6157                         }
6158                         $formats_nav .=
6159                                 ' (from';
6160                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6161                                 if ($co{'parents'}[$i] eq $hash_parent) {
6162                                         $formats_nav .= ' parent ' . ($i+1);
6163                                         last;
6164                                 }
6165                         }
6166                         $formats_nav .= ': ' .
6167                                 $cgi->a({-href => href(action=>"commitdiff",
6168                                                        hash=>$hash_parent)},
6169                                         esc_html($hash_parent_short)) .
6170                                 ')';
6171                 } elsif (!$co{'parent'}) {
6172                         # --root commitdiff
6173                         $formats_nav .= ' (initial)';
6174                 } elsif (scalar @{$co{'parents'}} == 1) {
6175                         # single parent commit
6176                         $formats_nav .=
6177                                 ' (parent: ' .
6178                                 $cgi->a({-href => href(action=>"commitdiff",
6179                                                        hash=>$co{'parent'})},
6180                                         esc_html(substr($co{'parent'}, 0, 7))) .
6181                                 ')';
6182                 } else {
6183                         # merge commit
6184                         if ($hash_parent eq '--cc') {
6185                                 $formats_nav .= ' | ' .
6186                                         $cgi->a({-href => href(action=>"commitdiff",
6187                                                                hash=>$hash, hash_parent=>'-c')},
6188                                                 'combined');
6189                         } else { # $hash_parent eq '-c'
6190                                 $formats_nav .= ' | ' .
6191                                         $cgi->a({-href => href(action=>"commitdiff",
6192                                                                hash=>$hash, hash_parent=>'--cc')},
6193                                                 'compact');
6194                         }
6195                         $formats_nav .=
6196                                 ' (merge: ' .
6197                                 join(' ', map {
6198                                         $cgi->a({-href => href(action=>"commitdiff",
6199                                                                hash=>$_)},
6200                                                 esc_html(substr($_, 0, 7)));
6201                                 } @{$co{'parents'}} ) .
6202                                 ')';
6203                 }
6204         }
6205
6206         my $hash_parent_param = $hash_parent;
6207         if (!defined $hash_parent_param) {
6208                 # --cc for multiple parents, --root for parentless
6209                 $hash_parent_param =
6210                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6211         }
6212
6213         # read commitdiff
6214         my $fd;
6215         my @difftree;
6216         if ($format eq 'html') {
6217                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6218                         "--no-commit-id", "--patch-with-raw", "--full-index",
6219                         $hash_parent_param, $hash, "--"
6220                         or die_error(500, "Open git-diff-tree failed");
6221
6222                 while (my $line = <$fd>) {
6223                         chomp $line;
6224                         # empty line ends raw part of diff-tree output
6225                         last unless $line;
6226                         push @difftree, scalar parse_difftree_raw_line($line);
6227                 }
6228
6229         } elsif ($format eq 'plain') {
6230                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6231                         '-p', $hash_parent_param, $hash, "--"
6232                         or die_error(500, "Open git-diff-tree failed");
6233         } elsif ($format eq 'patch') {
6234                 # For commit ranges, we limit the output to the number of
6235                 # patches specified in the 'patches' feature.
6236                 # For single commits, we limit the output to a single patch,
6237                 # diverging from the git-format-patch default.
6238                 my @commit_spec = ();
6239                 if ($hash_parent) {
6240                         if ($patch_max > 0) {
6241                                 push @commit_spec, "-$patch_max";
6242                         }
6243                         push @commit_spec, '-n', "$hash_parent..$hash";
6244                 } else {
6245                         if ($params{-single}) {
6246                                 push @commit_spec, '-1';
6247                         } else {
6248                                 if ($patch_max > 0) {
6249                                         push @commit_spec, "-$patch_max";
6250                                 }
6251                                 push @commit_spec, "-n";
6252                         }
6253                         push @commit_spec, '--root', $hash;
6254                 }
6255                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6256                         '--encoding=utf8', '--stdout', @commit_spec
6257                         or die_error(500, "Open git-format-patch failed");
6258         } else {
6259                 die_error(400, "Unknown commitdiff format");
6260         }
6261
6262         # non-textual hash id's can be cached
6263         my $expires;
6264         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6265                 $expires = "+1d";
6266         }
6267
6268         # write commit message
6269         if ($format eq 'html') {
6270                 my $refs = git_get_references();
6271                 my $ref = format_ref_marker($refs, $co{'id'});
6272
6273                 git_header_html(undef, $expires);
6274                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6275                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6276                 print "<div class=\"title_text\">\n" .
6277                       "<table class=\"object_header\">\n";
6278                 git_print_authorship_rows(\%co);
6279                 print "</table>".
6280                       "</div>\n";
6281                 print "<div class=\"page_body\">\n";
6282                 if (@{$co{'comment'}} > 1) {
6283                         print "<div class=\"log\">\n";
6284                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6285                         print "</div>\n"; # class="log"
6286                 }
6287
6288         } elsif ($format eq 'plain') {
6289                 my $refs = git_get_references("tags");
6290                 my $tagname = git_get_rev_name_tags($hash);
6291                 my $filename = basename($project) . "-$hash.patch";
6292
6293                 print $cgi->header(
6294                         -type => 'text/plain',
6295                         -charset => 'utf-8',
6296                         -expires => $expires,
6297                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6298                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6299                 print "From: " . to_utf8($co{'author'}) . "\n";
6300                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6301                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6302
6303                 print "X-Git-Tag: $tagname\n" if $tagname;
6304                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6305
6306                 foreach my $line (@{$co{'comment'}}) {
6307                         print to_utf8($line) . "\n";
6308                 }
6309                 print "---\n\n";
6310         } elsif ($format eq 'patch') {
6311                 my $filename = basename($project) . "-$hash.patch";
6312
6313                 print $cgi->header(
6314                         -type => 'text/plain',
6315                         -charset => 'utf-8',
6316                         -expires => $expires,
6317                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6318         }
6319
6320         # write patch
6321         if ($format eq 'html') {
6322                 my $use_parents = !defined $hash_parent ||
6323                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6324                 git_difftree_body(\@difftree, $hash,
6325                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6326                 print "<br/>\n";
6327
6328                 git_patchset_body($fd, \@difftree, $hash,
6329                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6330                 close $fd;
6331                 print "</div>\n"; # class="page_body"
6332                 git_footer_html();
6333
6334         } elsif ($format eq 'plain') {
6335                 local $/ = undef;
6336                 print <$fd>;
6337                 close $fd
6338                         or print "Reading git-diff-tree failed\n";
6339         } elsif ($format eq 'patch') {
6340                 local $/ = undef;
6341                 print <$fd>;
6342                 close $fd
6343                         or print "Reading git-format-patch failed\n";
6344         }
6345 }
6346
6347 sub git_commitdiff_plain {
6348         git_commitdiff(-format => 'plain');
6349 }
6350
6351 # format-patch-style patches
6352 sub git_patch {
6353         git_commitdiff(-format => 'patch', -single => 1);
6354 }
6355
6356 sub git_patches {
6357         git_commitdiff(-format => 'patch');
6358 }
6359
6360 sub git_history {
6361         git_log_generic('history', \&git_history_body,
6362                         $hash_base, $hash_parent_base,
6363                         $file_name, $hash);
6364 }
6365
6366 sub git_search {
6367         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6368         if (!defined $searchtext) {
6369                 die_error(400, "Text field is empty");
6370         }
6371         if (!defined $hash) {
6372                 $hash = git_get_head_hash($project);
6373         }
6374         my %co = parse_commit($hash);
6375         if (!%co) {
6376                 die_error(404, "Unknown commit object");
6377         }
6378         if (!defined $page) {
6379                 $page = 0;
6380         }
6381
6382         $searchtype ||= 'commit';
6383         if ($searchtype eq 'pickaxe') {
6384                 # pickaxe may take all resources of your box and run for several minutes
6385                 # with every query - so decide by yourself how public you make this feature
6386                 gitweb_check_feature('pickaxe')
6387                     or die_error(403, "Pickaxe is disabled");
6388         }
6389         if ($searchtype eq 'grep') {
6390                 gitweb_check_feature('grep')
6391                     or die_error(403, "Grep is disabled");
6392         }
6393
6394         git_header_html();
6395
6396         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6397                 my $greptype;
6398                 if ($searchtype eq 'commit') {
6399                         $greptype = "--grep=";
6400                 } elsif ($searchtype eq 'author') {
6401                         $greptype = "--author=";
6402                 } elsif ($searchtype eq 'committer') {
6403                         $greptype = "--committer=";
6404                 }
6405                 $greptype .= $searchtext;
6406                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6407                                                $greptype, '--regexp-ignore-case',
6408                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6409
6410                 my $paging_nav = '';
6411                 if ($page > 0) {
6412                         $paging_nav .=
6413                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6414                                                        searchtext=>$searchtext,
6415                                                        searchtype=>$searchtype)},
6416                                         "first");
6417                         $paging_nav .= " &sdot; " .
6418                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6419                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6420                 } else {
6421                         $paging_nav .= "first";
6422                         $paging_nav .= " &sdot; prev";
6423                 }
6424                 my $next_link = '';
6425                 if ($#commitlist >= 100) {
6426                         $next_link =
6427                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6428                                          -accesskey => "n", -title => "Alt-n"}, "next");
6429                         $paging_nav .= " &sdot; $next_link";
6430                 } else {
6431                         $paging_nav .= " &sdot; next";
6432                 }
6433
6434                 if ($#commitlist >= 100) {
6435                 }
6436
6437                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6438                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6439                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6440         }
6441
6442         if ($searchtype eq 'pickaxe') {
6443                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6444                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6445
6446                 print "<table class=\"pickaxe search\">\n";
6447                 my $alternate = 1;
6448                 local $/ = "\n";
6449                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6450                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6451                         ($search_use_regexp ? '--pickaxe-regex' : ());
6452                 undef %co;
6453                 my @files;
6454                 while (my $line = <$fd>) {
6455                         chomp $line;
6456                         next unless $line;
6457
6458                         my %set = parse_difftree_raw_line($line);
6459                         if (defined $set{'commit'}) {
6460                                 # finish previous commit
6461                                 if (%co) {
6462                                         print "</td>\n" .
6463                                               "<td class=\"link\">" .
6464                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6465                                               " | " .
6466                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6467                                         print "</td>\n" .
6468                                               "</tr>\n";
6469                                 }
6470
6471                                 if ($alternate) {
6472                                         print "<tr class=\"dark\">\n";
6473                                 } else {
6474                                         print "<tr class=\"light\">\n";
6475                                 }
6476                                 $alternate ^= 1;
6477                                 %co = parse_commit($set{'commit'});
6478                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6479                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6480                                       "<td><i>$author</i></td>\n" .
6481                                       "<td>" .
6482                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6483                                               -class => "list subject"},
6484                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6485                         } elsif (defined $set{'to_id'}) {
6486                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6487
6488                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6489                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6490                                               -class => "list"},
6491                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6492                                       "<br/>\n";
6493                         }
6494                 }
6495                 close $fd;
6496
6497                 # finish last commit (warning: repetition!)
6498                 if (%co) {
6499                         print "</td>\n" .
6500                               "<td class=\"link\">" .
6501                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6502                               " | " .
6503                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6504                         print "</td>\n" .
6505                               "</tr>\n";
6506                 }
6507
6508                 print "</table>\n";
6509         }
6510
6511         if ($searchtype eq 'grep') {
6512                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6513                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6514
6515                 print "<table class=\"grep_search\">\n";
6516                 my $alternate = 1;
6517                 my $matches = 0;
6518                 local $/ = "\n";
6519                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6520                         $search_use_regexp ? ('-E', '-i') : '-F',
6521                         $searchtext, $co{'tree'};
6522                 my $lastfile = '';
6523                 while (my $line = <$fd>) {
6524                         chomp $line;
6525                         my ($file, $lno, $ltext, $binary);
6526                         last if ($matches++ > 1000);
6527                         if ($line =~ /^Binary file (.+) matches$/) {
6528                                 $file = $1;
6529                                 $binary = 1;
6530                         } else {
6531                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6532                         }
6533                         if ($file ne $lastfile) {
6534                                 $lastfile and print "</td></tr>\n";
6535                                 if ($alternate++) {
6536                                         print "<tr class=\"dark\">\n";
6537                                 } else {
6538                                         print "<tr class=\"light\">\n";
6539                                 }
6540                                 print "<td class=\"list\">".
6541                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6542                                                                file_name=>"$file"),
6543                                                 -class => "list"}, esc_path($file));
6544                                 print "</td><td>\n";
6545                                 $lastfile = $file;
6546                         }
6547                         if ($binary) {
6548                                 print "<div class=\"binary\">Binary file</div>\n";
6549                         } else {
6550                                 $ltext = untabify($ltext);
6551                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6552                                         $ltext = esc_html($1, -nbsp=>1);
6553                                         $ltext .= '<span class="match">';
6554                                         $ltext .= esc_html($2, -nbsp=>1);
6555                                         $ltext .= '</span>';
6556                                         $ltext .= esc_html($3, -nbsp=>1);
6557                                 } else {
6558                                         $ltext = esc_html($ltext, -nbsp=>1);
6559                                 }
6560                                 print "<div class=\"pre\">" .
6561                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6562                                                                file_name=>"$file").'#l'.$lno,
6563                                                 -class => "linenr"}, sprintf('%4i', $lno))
6564                                         . ' ' .  $ltext . "</div>\n";
6565                         }
6566                 }
6567                 if ($lastfile) {
6568                         print "</td></tr>\n";
6569                         if ($matches > 1000) {
6570                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6571                         }
6572                 } else {
6573                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6574                 }
6575                 close $fd;
6576
6577                 print "</table>\n";
6578         }
6579         git_footer_html();
6580 }
6581
6582 sub git_search_help {
6583         git_header_html();
6584         git_print_page_nav('','', $hash,$hash,$hash);
6585         print <<EOT;
6586 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6587 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6588 the pattern entered is recognized as the POSIX extended
6589 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6590 insensitive).</p>
6591 <dl>
6592 <dt><b>commit</b></dt>
6593 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6594 EOT
6595         my $have_grep = gitweb_check_feature('grep');
6596         if ($have_grep) {
6597                 print <<EOT;
6598 <dt><b>grep</b></dt>
6599 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6600     a different one) are searched for the given pattern. On large trees, this search can take
6601 a while and put some strain on the server, so please use it with some consideration. Note that
6602 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6603 case-sensitive.</dd>
6604 EOT
6605         }
6606         print <<EOT;
6607 <dt><b>author</b></dt>
6608 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6609 <dt><b>committer</b></dt>
6610 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6611 EOT
6612         my $have_pickaxe = gitweb_check_feature('pickaxe');
6613         if ($have_pickaxe) {
6614                 print <<EOT;
6615 <dt><b>pickaxe</b></dt>
6616 <dd>All commits that caused the string to appear or disappear from any file (changes that
6617 added, removed or "modified" the string) will be listed. This search can take a while and
6618 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6619 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6620 EOT
6621         }
6622         print "</dl>\n";
6623         git_footer_html();
6624 }
6625
6626 sub git_shortlog {
6627         git_log_generic('shortlog', \&git_shortlog_body,
6628                         $hash, $hash_parent);
6629 }
6630
6631 ## ......................................................................
6632 ## feeds (RSS, Atom; OPML)
6633
6634 sub git_feed {
6635         my $format = shift || 'atom';
6636         my $have_blame = gitweb_check_feature('blame');
6637
6638         # Atom: http://www.atomenabled.org/developers/syndication/
6639         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6640         if ($format ne 'rss' && $format ne 'atom') {
6641                 die_error(400, "Unknown web feed format");
6642         }
6643
6644         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6645         my $head = $hash || 'HEAD';
6646         my @commitlist = parse_commits($head, 150, 0, $file_name);
6647
6648         my %latest_commit;
6649         my %latest_date;
6650         my $content_type = "application/$format+xml";
6651         if (defined $cgi->http('HTTP_ACCEPT') &&
6652                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6653                 # browser (feed reader) prefers text/xml
6654                 $content_type = 'text/xml';
6655         }
6656         if (defined($commitlist[0])) {
6657                 %latest_commit = %{$commitlist[0]};
6658                 my $latest_epoch = $latest_commit{'committer_epoch'};
6659                 %latest_date   = parse_date($latest_epoch);
6660                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6661                 if (defined $if_modified) {
6662                         my $since;
6663                         if (eval { require HTTP::Date; 1; }) {
6664                                 $since = HTTP::Date::str2time($if_modified);
6665                         } elsif (eval { require Time::ParseDate; 1; }) {
6666                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6667                         }
6668                         if (defined $since && $latest_epoch <= $since) {
6669                                 print $cgi->header(
6670                                         -type => $content_type,
6671                                         -charset => 'utf-8',
6672                                         -last_modified => $latest_date{'rfc2822'},
6673                                         -status => '304 Not Modified');
6674                                 return;
6675                         }
6676                 }
6677                 print $cgi->header(
6678                         -type => $content_type,
6679                         -charset => 'utf-8',
6680                         -last_modified => $latest_date{'rfc2822'});
6681         } else {
6682                 print $cgi->header(
6683                         -type => $content_type,
6684                         -charset => 'utf-8');
6685         }
6686
6687         # Optimization: skip generating the body if client asks only
6688         # for Last-Modified date.
6689         return if ($cgi->request_method() eq 'HEAD');
6690
6691         # header variables
6692         my $title = "$site_name - $project/$action";
6693         my $feed_type = 'log';
6694         if (defined $hash) {
6695                 $title .= " - '$hash'";
6696                 $feed_type = 'branch log';
6697                 if (defined $file_name) {
6698                         $title .= " :: $file_name";
6699                         $feed_type = 'history';
6700                 }
6701         } elsif (defined $file_name) {
6702                 $title .= " - $file_name";
6703                 $feed_type = 'history';
6704         }
6705         $title .= " $feed_type";
6706         my $descr = git_get_project_description($project);
6707         if (defined $descr) {
6708                 $descr = esc_html($descr);
6709         } else {
6710                 $descr = "$project " .
6711                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6712                          " feed";
6713         }
6714         my $owner = git_get_project_owner($project);
6715         $owner = esc_html($owner);
6716
6717         #header
6718         my $alt_url;
6719         if (defined $file_name) {
6720                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6721         } elsif (defined $hash) {
6722                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6723         } else {
6724                 $alt_url = href(-full=>1, action=>"summary");
6725         }
6726         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6727         if ($format eq 'rss') {
6728                 print <<XML;
6729 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6730 <channel>
6731 XML
6732                 print "<title>$title</title>\n" .
6733                       "<link>$alt_url</link>\n" .
6734                       "<description>$descr</description>\n" .
6735                       "<language>en</language>\n" .
6736                       # project owner is responsible for 'editorial' content
6737                       "<managingEditor>$owner</managingEditor>\n";
6738                 if (defined $logo || defined $favicon) {
6739                         # prefer the logo to the favicon, since RSS
6740                         # doesn't allow both
6741                         my $img = esc_url($logo || $favicon);
6742                         print "<image>\n" .
6743                               "<url>$img</url>\n" .
6744                               "<title>$title</title>\n" .
6745                               "<link>$alt_url</link>\n" .
6746                               "</image>\n";
6747                 }
6748                 if (%latest_date) {
6749                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6750                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6751                 }
6752                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6753         } elsif ($format eq 'atom') {
6754                 print <<XML;
6755 <feed xmlns="http://www.w3.org/2005/Atom">
6756 XML
6757                 print "<title>$title</title>\n" .
6758                       "<subtitle>$descr</subtitle>\n" .
6759                       '<link rel="alternate" type="text/html" href="' .
6760                       $alt_url . '" />' . "\n" .
6761                       '<link rel="self" type="' . $content_type . '" href="' .
6762                       $cgi->self_url() . '" />' . "\n" .
6763                       "<id>" . href(-full=>1) . "</id>\n" .
6764                       # use project owner for feed author
6765                       "<author><name>$owner</name></author>\n";
6766                 if (defined $favicon) {
6767                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6768                 }
6769                 if (defined $logo_url) {
6770                         # not twice as wide as tall: 72 x 27 pixels
6771                         print "<logo>" . esc_url($logo) . "</logo>\n";
6772                 }
6773                 if (! %latest_date) {
6774                         # dummy date to keep the feed valid until commits trickle in:
6775                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6776                 } else {
6777                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6778                 }
6779                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6780         }
6781
6782         # contents
6783         for (my $i = 0; $i <= $#commitlist; $i++) {
6784                 my %co = %{$commitlist[$i]};
6785                 my $commit = $co{'id'};
6786                 # we read 150, we always show 30 and the ones more recent than 48 hours
6787                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6788                         last;
6789                 }
6790                 my %cd = parse_date($co{'author_epoch'});
6791
6792                 # get list of changed files
6793                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6794                         $co{'parent'} || "--root",
6795                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6796                         or next;
6797                 my @difftree = map { chomp; $_ } <$fd>;
6798                 close $fd
6799                         or next;
6800
6801                 # print element (entry, item)
6802                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6803                 if ($format eq 'rss') {
6804                         print "<item>\n" .
6805                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6806                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6807                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6808                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6809                               "<link>$co_url</link>\n" .
6810                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6811                               "<content:encoded>" .
6812                               "<![CDATA[\n";
6813                 } elsif ($format eq 'atom') {
6814                         print "<entry>\n" .
6815                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6816                               "<updated>$cd{'iso-8601'}</updated>\n" .
6817                               "<author>\n" .
6818                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6819                         if ($co{'author_email'}) {
6820                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6821                         }
6822                         print "</author>\n" .
6823                               # use committer for contributor
6824                               "<contributor>\n" .
6825                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6826                         if ($co{'committer_email'}) {
6827                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6828                         }
6829                         print "</contributor>\n" .
6830                               "<published>$cd{'iso-8601'}</published>\n" .
6831                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6832                               "<id>$co_url</id>\n" .
6833                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6834                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6835                 }
6836                 my $comment = $co{'comment'};
6837                 print "<pre>\n";
6838                 foreach my $line (@$comment) {
6839                         $line = esc_html($line);
6840                         print "$line\n";
6841                 }
6842                 print "</pre><ul>\n";
6843                 foreach my $difftree_line (@difftree) {
6844                         my %difftree = parse_difftree_raw_line($difftree_line);
6845                         next if !$difftree{'from_id'};
6846
6847                         my $file = $difftree{'file'} || $difftree{'to_file'};
6848
6849                         print "<li>" .
6850                               "[" .
6851                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6852                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6853                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6854                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6855                                       -title => "diff"}, 'D');
6856                         if ($have_blame) {
6857                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6858                                                              file_name=>$file, hash_base=>$commit),
6859                                               -title => "blame"}, 'B');
6860                         }
6861                         # if this is not a feed of a file history
6862                         if (!defined $file_name || $file_name ne $file) {
6863                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6864                                                              file_name=>$file, hash=>$commit),
6865                                               -title => "history"}, 'H');
6866                         }
6867                         $file = esc_path($file);
6868                         print "] ".
6869                               "$file</li>\n";
6870                 }
6871                 if ($format eq 'rss') {
6872                         print "</ul>]]>\n" .
6873                               "</content:encoded>\n" .
6874                               "</item>\n";
6875                 } elsif ($format eq 'atom') {
6876                         print "</ul>\n</div>\n" .
6877                               "</content>\n" .
6878                               "</entry>\n";
6879                 }
6880         }
6881
6882         # end of feed
6883         if ($format eq 'rss') {
6884                 print "</channel>\n</rss>\n";
6885         } elsif ($format eq 'atom') {
6886                 print "</feed>\n";
6887         }
6888 }
6889
6890 sub git_rss {
6891         git_feed('rss');
6892 }
6893
6894 sub git_atom {
6895         git_feed('atom');
6896 }
6897
6898 sub git_opml {
6899         my @list = git_get_projects_list();
6900
6901         print $cgi->header(
6902                 -type => 'text/xml',
6903                 -charset => 'utf-8',
6904                 -content_disposition => 'inline; filename="opml.xml"');
6905
6906         print <<XML;
6907 <?xml version="1.0" encoding="utf-8"?>
6908 <opml version="1.0">
6909 <head>
6910   <title>$site_name OPML Export</title>
6911 </head>
6912 <body>
6913 <outline text="git RSS feeds">
6914 XML
6915
6916         foreach my $pr (@list) {
6917                 my %proj = %$pr;
6918                 my $head = git_get_head_hash($proj{'path'});
6919                 if (!defined $head) {
6920                         next;
6921                 }
6922                 $git_dir = "$projectroot/$proj{'path'}";
6923                 my %co = parse_commit($head);
6924                 if (!%co) {
6925                         next;
6926                 }
6927
6928                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6929                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6930                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6931                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6932         }
6933         print <<XML;
6934 </outline>
6935 </body>
6936 </opml>
6937 XML
6938 }