git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 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 # dispatch
 980 sub dispatch {
 981         if (!defined $action) {
 982                 if (defined $hash) {
 983                         $action = git_get_type($hash);
 984                 } elsif (defined $hash_base && defined $file_name) {
 985                         $action = git_get_type("$hash_base:$file_name");
 986                 } elsif (defined $project) {
 987                         $action = 'summary';
 988                 } else {
 989                         $action = 'project_list';
 990                 }
 991         }
 992         if (!defined($actions{$action})) {
 993                 die_error(400, "Unknown action");
 994         }
 995         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 996             !$project) {
 997                 die_error(400, "Project needed");
 998         }
 999         $actions{$action}->();
1000 }
1001
1002 sub run_request {
1003         our $t0 = [Time::HiRes::gettimeofday()]
1004                 if defined $t0;
1005
1006         evaluate_uri();
1007         evaluate_gitweb_config();
1008         evaluate_git_version();
1009         check_loadavg();
1010
1011         # $projectroot and $projects_list might be set in gitweb config file
1012         $projects_list ||= $projectroot;
1013
1014         evaluate_query_params();
1015         evaluate_path_info();
1016         evaluate_and_validate_params();
1017         evaluate_git_dir();
1018
1019         configure_gitweb_features();
1020
1021         dispatch();
1022 }
1023
1024 our $is_last_request = sub { 1 };
1025 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1026 our $CGI = 'CGI';
1027 our $cgi;
1028 sub evaluate_argv {
1029         return unless (@ARGV);
1030
1031         require Getopt::Long;
1032         Getopt::Long::GetOptions(
1033                 'fastcgi|fcgi|f' => sub {
1034                         require CGI::Fast;
1035                         our $CGI = 'CGI::Fast';
1036
1037                         my $request_number = 0;
1038                         # let each child service 100 requests
1039                         our $is_last_request = sub { ++$request_number > 100 };
1040                 },
1041                 'nproc|n=i' => sub {
1042                         my ($arg, $val) = @_;
1043                         return unless eval { require FCGI::ProcManager; 1; };
1044                         my $proc_manager = FCGI::ProcManager->new({
1045                                 n_processes => $val,
1046                         });
1047                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1048                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1049                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1050                 },
1051         );
1052 }
1053
1054 sub run {
1055         evaluate_argv();
1056
1057         $pre_listen_hook->()
1058                 if $pre_listen_hook;
1059
1060  REQUEST:
1061         while ($cgi = $CGI->new()) {
1062                 $pre_dispatch_hook->()
1063                         if $pre_dispatch_hook;
1064
1065                 run_request();
1066
1067                 $pre_dispatch_hook->()
1068                         if $post_dispatch_hook;
1069
1070                 last REQUEST if ($is_last_request->());
1071         }
1072
1073  DONE_GITWEB:
1074         1;
1075 }
1076
1077 run();
1078
1079 ## ======================================================================
1080 ## action links
1081
1082 # possible values of extra options
1083 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1084 # -replay => 1      - start from a current view (replay with modifications)
1085 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1086 sub href {
1087         my %params = @_;
1088         # default is to use -absolute url() i.e. $my_uri
1089         my $href = $params{-full} ? $my_url : $my_uri;
1090
1091         $params{'project'} = $project unless exists $params{'project'};
1092
1093         if ($params{-replay}) {
1094                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1095                         if (!exists $params{$name}) {
1096                                 $params{$name} = $input_params{$name};
1097                         }
1098                 }
1099         }
1100
1101         my $use_pathinfo = gitweb_check_feature('pathinfo');
1102         if (defined $params{'project'} &&
1103             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1104                 # try to put as many parameters as possible in PATH_INFO:
1105                 #   - project name
1106                 #   - action
1107                 #   - hash_parent or hash_parent_base:/file_parent
1108                 #   - hash or hash_base:/filename
1109                 #   - the snapshot_format as an appropriate suffix
1110
1111                 # When the script is the root DirectoryIndex for the domain,
1112                 # $href here would be something like http://gitweb.example.com/
1113                 # Thus, we strip any trailing / from $href, to spare us double
1114                 # slashes in the final URL
1115                 $href =~ s,/$,,;
1116
1117                 # Then add the project name, if present
1118                 $href .= "/".esc_url($params{'project'});
1119                 delete $params{'project'};
1120
1121                 # since we destructively absorb parameters, we keep this
1122                 # boolean that remembers if we're handling a snapshot
1123                 my $is_snapshot = $params{'action'} eq 'snapshot';
1124
1125                 # Summary just uses the project path URL, any other action is
1126                 # added to the URL
1127                 if (defined $params{'action'}) {
1128                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1129                         delete $params{'action'};
1130                 }
1131
1132                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1133                 # stripping nonexistent or useless pieces
1134                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1135                         || $params{'hash_parent'} || $params{'hash'});
1136                 if (defined $params{'hash_base'}) {
1137                         if (defined $params{'hash_parent_base'}) {
1138                                 $href .= esc_url($params{'hash_parent_base'});
1139                                 # skip the file_parent if it's the same as the file_name
1140                                 if (defined $params{'file_parent'}) {
1141                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1142                                                 delete $params{'file_parent'};
1143                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1144                                                 $href .= ":/".esc_url($params{'file_parent'});
1145                                                 delete $params{'file_parent'};
1146                                         }
1147                                 }
1148                                 $href .= "..";
1149                                 delete $params{'hash_parent'};
1150                                 delete $params{'hash_parent_base'};
1151                         } elsif (defined $params{'hash_parent'}) {
1152                                 $href .= esc_url($params{'hash_parent'}). "..";
1153                                 delete $params{'hash_parent'};
1154                         }
1155
1156                         $href .= esc_url($params{'hash_base'});
1157                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1158                                 $href .= ":/".esc_url($params{'file_name'});
1159                                 delete $params{'file_name'};
1160                         }
1161                         delete $params{'hash'};
1162                         delete $params{'hash_base'};
1163                 } elsif (defined $params{'hash'}) {
1164                         $href .= esc_url($params{'hash'});
1165                         delete $params{'hash'};
1166                 }
1167
1168                 # If the action was a snapshot, we can absorb the
1169                 # snapshot_format parameter too
1170                 if ($is_snapshot) {
1171                         my $fmt = $params{'snapshot_format'};
1172                         # snapshot_format should always be defined when href()
1173                         # is called, but just in case some code forgets, we
1174                         # fall back to the default
1175                         $fmt ||= $snapshot_fmts[0];
1176                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1177                         delete $params{'snapshot_format'};
1178                 }
1179         }
1180
1181         # now encode the parameters explicitly
1182         my @result = ();
1183         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1184                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1185                 if (defined $params{$name}) {
1186                         if (ref($params{$name}) eq "ARRAY") {
1187                                 foreach my $par (@{$params{$name}}) {
1188                                         push @result, $symbol . "=" . esc_param($par);
1189                                 }
1190                         } else {
1191                                 push @result, $symbol . "=" . esc_param($params{$name});
1192                         }
1193                 }
1194         }
1195         $href .= "?" . join(';', @result) if scalar @result;
1196
1197         return $href;
1198 }
1199
1200
1201 ## ======================================================================
1202 ## validation, quoting/unquoting and escaping
1203
1204 sub validate_action {
1205         my $input = shift || return undef;
1206         return undef unless exists $actions{$input};
1207         return $input;
1208 }
1209
1210 sub validate_project {
1211         my $input = shift || return undef;
1212         if (!validate_pathname($input) ||
1213                 !(-d "$projectroot/$input") ||
1214                 !check_export_ok("$projectroot/$input") ||
1215                 ($strict_export && !project_in_list($input))) {
1216                 return undef;
1217         } else {
1218                 return $input;
1219         }
1220 }
1221
1222 sub validate_pathname {
1223         my $input = shift || return undef;
1224
1225         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1226         # at the beginning, at the end, and between slashes.
1227         # also this catches doubled slashes
1228         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1229                 return undef;
1230         }
1231         # no null characters
1232         if ($input =~ m!\0!) {
1233                 return undef;
1234         }
1235         return $input;
1236 }
1237
1238 sub validate_refname {
1239         my $input = shift || return undef;
1240
1241         # textual hashes are O.K.
1242         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1243                 return $input;
1244         }
1245         # it must be correct pathname
1246         $input = validate_pathname($input)
1247                 or return undef;
1248         # restrictions on ref name according to git-check-ref-format
1249         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1250                 return undef;
1251         }
1252         return $input;
1253 }
1254
1255 # decode sequences of octets in utf8 into Perl's internal form,
1256 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1257 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1258 sub to_utf8 {
1259         my $str = shift;
1260         return undef unless defined $str;
1261         if (utf8::valid($str)) {
1262                 utf8::decode($str);
1263                 return $str;
1264         } else {
1265                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1266         }
1267 }
1268
1269 # quote unsafe chars, but keep the slash, even when it's not
1270 # correct, but quoted slashes look too horrible in bookmarks
1271 sub esc_param {
1272         my $str = shift;
1273         return undef unless defined $str;
1274         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1275         $str =~ s/ /\+/g;
1276         return $str;
1277 }
1278
1279 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1280 sub esc_url {
1281         my $str = shift;
1282         return undef unless defined $str;
1283         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1284         $str =~ s/\+/%2B/g;
1285         $str =~ s/ /\+/g;
1286         return $str;
1287 }
1288
1289 # replace invalid utf8 character with SUBSTITUTION sequence
1290 sub esc_html {
1291         my $str = shift;
1292         my %opts = @_;
1293
1294         return undef unless defined $str;
1295
1296         $str = to_utf8($str);
1297         $str = $cgi->escapeHTML($str);
1298         if ($opts{'-nbsp'}) {
1299                 $str =~ s/ /&nbsp;/g;
1300         }
1301         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1302         return $str;
1303 }
1304
1305 # quote control characters and escape filename to HTML
1306 sub esc_path {
1307         my $str = shift;
1308         my %opts = @_;
1309
1310         return undef unless defined $str;
1311
1312         $str = to_utf8($str);
1313         $str = $cgi->escapeHTML($str);
1314         if ($opts{'-nbsp'}) {
1315                 $str =~ s/ /&nbsp;/g;
1316         }
1317         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1318         return $str;
1319 }
1320
1321 # Make control characters "printable", using character escape codes (CEC)
1322 sub quot_cec {
1323         my $cntrl = shift;
1324         my %opts = @_;
1325         my %es = ( # character escape codes, aka escape sequences
1326                 "\t" => '\t',   # tab            (HT)
1327                 "\n" => '\n',   # line feed      (LF)
1328                 "\r" => '\r',   # carrige return (CR)
1329                 "\f" => '\f',   # form feed      (FF)
1330                 "\b" => '\b',   # backspace      (BS)
1331                 "\a" => '\a',   # alarm (bell)   (BEL)
1332                 "\e" => '\e',   # escape         (ESC)
1333                 "\013" => '\v', # vertical tab   (VT)
1334                 "\000" => '\0', # nul character  (NUL)
1335         );
1336         my $chr = ( (exists $es{$cntrl})
1337                     ? $es{$cntrl}
1338                     : sprintf('\%2x', ord($cntrl)) );
1339         if ($opts{-nohtml}) {
1340                 return $chr;
1341         } else {
1342                 return "<span class=\"cntrl\">$chr</span>";
1343         }
1344 }
1345
1346 # Alternatively use unicode control pictures codepoints,
1347 # Unicode "printable representation" (PR)
1348 sub quot_upr {
1349         my $cntrl = shift;
1350         my %opts = @_;
1351
1352         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1353         if ($opts{-nohtml}) {
1354                 return $chr;
1355         } else {
1356                 return "<span class=\"cntrl\">$chr</span>";
1357         }
1358 }
1359
1360 # git may return quoted and escaped filenames
1361 sub unquote {
1362         my $str = shift;
1363
1364         sub unq {
1365                 my $seq = shift;
1366                 my %es = ( # character escape codes, aka escape sequences
1367                         't' => "\t",   # tab            (HT, TAB)
1368                         'n' => "\n",   # newline        (NL)
1369                         'r' => "\r",   # return         (CR)
1370                         'f' => "\f",   # form feed      (FF)
1371                         'b' => "\b",   # backspace      (BS)
1372                         'a' => "\a",   # alarm (bell)   (BEL)
1373                         'e' => "\e",   # escape         (ESC)
1374                         'v' => "\013", # vertical tab   (VT)
1375                 );
1376
1377                 if ($seq =~ m/^[0-7]{1,3}$/) {
1378                         # octal char sequence
1379                         return chr(oct($seq));
1380                 } elsif (exists $es{$seq}) {
1381                         # C escape sequence, aka character escape code
1382                         return $es{$seq};
1383                 }
1384                 # quoted ordinary character
1385                 return $seq;
1386         }
1387
1388         if ($str =~ m/^"(.*)"$/) {
1389                 # needs unquoting
1390                 $str = $1;
1391                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1392         }
1393         return $str;
1394 }
1395
1396 # escape tabs (convert tabs to spaces)
1397 sub untabify {
1398         my $line = shift;
1399
1400         while ((my $pos = index($line, "\t")) != -1) {
1401                 if (my $count = (8 - ($pos % 8))) {
1402                         my $spaces = ' ' x $count;
1403                         $line =~ s/\t/$spaces/;
1404                 }
1405         }
1406
1407         return $line;
1408 }
1409
1410 sub project_in_list {
1411         my $project = shift;
1412         my @list = git_get_projects_list();
1413         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1414 }
1415
1416 ## ----------------------------------------------------------------------
1417 ## HTML aware string manipulation
1418
1419 # Try to chop given string on a word boundary between position
1420 # $len and $len+$add_len. If there is no word boundary there,
1421 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1422 # (marking chopped part) would be longer than given string.
1423 sub chop_str {
1424         my $str = shift;
1425         my $len = shift;
1426         my $add_len = shift || 10;
1427         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1428
1429         # Make sure perl knows it is utf8 encoded so we don't
1430         # cut in the middle of a utf8 multibyte char.
1431         $str = to_utf8($str);
1432
1433         # allow only $len chars, but don't cut a word if it would fit in $add_len
1434         # if it doesn't fit, cut it if it's still longer than the dots we would add
1435         # remove chopped character entities entirely
1436
1437         # when chopping in the middle, distribute $len into left and right part
1438         # return early if chopping wouldn't make string shorter
1439         if ($where eq 'center') {
1440                 return $str if ($len + 5 >= length($str)); # filler is length 5
1441                 $len = int($len/2);
1442         } else {
1443                 return $str if ($len + 4 >= length($str)); # filler is length 4
1444         }
1445
1446         # regexps: ending and beginning with word part up to $add_len
1447         my $endre = qr/.{$len}\w{0,$add_len}/;
1448         my $begre = qr/\w{0,$add_len}.{$len}/;
1449
1450         if ($where eq 'left') {
1451                 $str =~ m/^(.*?)($begre)$/;
1452                 my ($lead, $body) = ($1, $2);
1453                 if (length($lead) > 4) {
1454                         $lead = " ...";
1455                 }
1456                 return "$lead$body";
1457
1458         } elsif ($where eq 'center') {
1459                 $str =~ m/^($endre)(.*)$/;
1460                 my ($left, $str)  = ($1, $2);
1461                 $str =~ m/^(.*?)($begre)$/;
1462                 my ($mid, $right) = ($1, $2);
1463                 if (length($mid) > 5) {
1464                         $mid = " ... ";
1465                 }
1466                 return "$left$mid$right";
1467
1468         } else {
1469                 $str =~ m/^($endre)(.*)$/;
1470                 my $body = $1;
1471                 my $tail = $2;
1472                 if (length($tail) > 4) {
1473                         $tail = "... ";
1474                 }
1475                 return "$body$tail";
1476         }
1477 }
1478
1479 # takes the same arguments as chop_str, but also wraps a <span> around the
1480 # result with a title attribute if it does get chopped. Additionally, the
1481 # string is HTML-escaped.
1482 sub chop_and_escape_str {
1483         my ($str) = @_;
1484
1485         my $chopped = chop_str(@_);
1486         if ($chopped eq $str) {
1487                 return esc_html($chopped);
1488         } else {
1489                 $str =~ s/[[:cntrl:]]/?/g;
1490                 return $cgi->span({-title=>$str}, esc_html($chopped));
1491         }
1492 }
1493
1494 ## ----------------------------------------------------------------------
1495 ## functions returning short strings
1496
1497 # CSS class for given age value (in seconds)
1498 sub age_class {
1499         my $age = shift;
1500
1501         if (!defined $age) {
1502                 return "noage";
1503         } elsif ($age < 60*60*2) {
1504                 return "age0";
1505         } elsif ($age < 60*60*24*2) {
1506                 return "age1";
1507         } else {
1508                 return "age2";
1509         }
1510 }
1511
1512 # convert age in seconds to "nn units ago" string
1513 sub age_string {
1514         my $age = shift;
1515         my $age_str;
1516
1517         if ($age > 60*60*24*365*2) {
1518                 $age_str = (int $age/60/60/24/365);
1519                 $age_str .= " years ago";
1520         } elsif ($age > 60*60*24*(365/12)*2) {
1521                 $age_str = int $age/60/60/24/(365/12);
1522                 $age_str .= " months ago";
1523         } elsif ($age > 60*60*24*7*2) {
1524                 $age_str = int $age/60/60/24/7;
1525                 $age_str .= " weeks ago";
1526         } elsif ($age > 60*60*24*2) {
1527                 $age_str = int $age/60/60/24;
1528                 $age_str .= " days ago";
1529         } elsif ($age > 60*60*2) {
1530                 $age_str = int $age/60/60;
1531                 $age_str .= " hours ago";
1532         } elsif ($age > 60*2) {
1533                 $age_str = int $age/60;
1534                 $age_str .= " min ago";
1535         } elsif ($age > 2) {
1536                 $age_str = int $age;
1537                 $age_str .= " sec ago";
1538         } else {
1539                 $age_str .= " right now";
1540         }
1541         return $age_str;
1542 }
1543
1544 use constant {
1545         S_IFINVALID => 0030000,
1546         S_IFGITLINK => 0160000,
1547 };
1548
1549 # submodule/subproject, a commit object reference
1550 sub S_ISGITLINK {
1551         my $mode = shift;
1552
1553         return (($mode & S_IFMT) == S_IFGITLINK)
1554 }
1555
1556 # convert file mode in octal to symbolic file mode string
1557 sub mode_str {
1558         my $mode = oct shift;
1559
1560         if (S_ISGITLINK($mode)) {
1561                 return 'm---------';
1562         } elsif (S_ISDIR($mode & S_IFMT)) {
1563                 return 'drwxr-xr-x';
1564         } elsif (S_ISLNK($mode)) {
1565                 return 'lrwxrwxrwx';
1566         } elsif (S_ISREG($mode)) {
1567                 # git cares only about the executable bit
1568                 if ($mode & S_IXUSR) {
1569                         return '-rwxr-xr-x';
1570                 } else {
1571                         return '-rw-r--r--';
1572                 };
1573         } else {
1574                 return '----------';
1575         }
1576 }
1577
1578 # convert file mode in octal to file type string
1579 sub file_type {
1580         my $mode = shift;
1581
1582         if ($mode !~ m/^[0-7]+$/) {
1583                 return $mode;
1584         } else {
1585                 $mode = oct $mode;
1586         }
1587
1588         if (S_ISGITLINK($mode)) {
1589                 return "submodule";
1590         } elsif (S_ISDIR($mode & S_IFMT)) {
1591                 return "directory";
1592         } elsif (S_ISLNK($mode)) {
1593                 return "symlink";
1594         } elsif (S_ISREG($mode)) {
1595                 return "file";
1596         } else {
1597                 return "unknown";
1598         }
1599 }
1600
1601 # convert file mode in octal to file type description string
1602 sub file_type_long {
1603         my $mode = shift;
1604
1605         if ($mode !~ m/^[0-7]+$/) {
1606                 return $mode;
1607         } else {
1608                 $mode = oct $mode;
1609         }
1610
1611         if (S_ISGITLINK($mode)) {
1612                 return "submodule";
1613         } elsif (S_ISDIR($mode & S_IFMT)) {
1614                 return "directory";
1615         } elsif (S_ISLNK($mode)) {
1616                 return "symlink";
1617         } elsif (S_ISREG($mode)) {
1618                 if ($mode & S_IXUSR) {
1619                         return "executable";
1620                 } else {
1621                         return "file";
1622                 };
1623         } else {
1624                 return "unknown";
1625         }
1626 }
1627
1628
1629 ## ----------------------------------------------------------------------
1630 ## functions returning short HTML fragments, or transforming HTML fragments
1631 ## which don't belong to other sections
1632
1633 # format line of commit message.
1634 sub format_log_line_html {
1635         my $line = shift;
1636
1637         $line = esc_html($line, -nbsp=>1);
1638         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1639                 $cgi->a({-href => href(action=>"object", hash=>$1),
1640                                         -class => "text"}, $1);
1641         }eg;
1642
1643         return $line;
1644 }
1645
1646 # format marker of refs pointing to given object
1647
1648 # the destination action is chosen based on object type and current context:
1649 # - for annotated tags, we choose the tag view unless it's the current view
1650 #   already, in which case we go to shortlog view
1651 # - for other refs, we keep the current view if we're in history, shortlog or
1652 #   log view, and select shortlog otherwise
1653 sub format_ref_marker {
1654         my ($refs, $id) = @_;
1655         my $markers = '';
1656
1657         if (defined $refs->{$id}) {
1658                 foreach my $ref (@{$refs->{$id}}) {
1659                         # this code exploits the fact that non-lightweight tags are the
1660                         # only indirect objects, and that they are the only objects for which
1661                         # we want to use tag instead of shortlog as action
1662                         my ($type, $name) = qw();
1663                         my $indirect = ($ref =~ s/\^\{\}$//);
1664                         # e.g. tags/v2.6.11 or heads/next
1665                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1666                                 $type = $1;
1667                                 $name = $2;
1668                         } else {
1669                                 $type = "ref";
1670                                 $name = $ref;
1671                         }
1672
1673                         my $class = $type;
1674                         $class .= " indirect" if $indirect;
1675
1676                         my $dest_action = "shortlog";
1677
1678                         if ($indirect) {
1679                                 $dest_action = "tag" unless $action eq "tag";
1680                         } elsif ($action =~ /^(history|(short)?log)$/) {
1681                                 $dest_action = $action;
1682                         }
1683
1684                         my $dest = "";
1685                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1686                         $dest .= $ref;
1687
1688                         my $link = $cgi->a({
1689                                 -href => href(
1690                                         action=>$dest_action,
1691                                         hash=>$dest
1692                                 )}, $name);
1693
1694                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1695                                 $link . "</span>";
1696                 }
1697         }
1698
1699         if ($markers) {
1700                 return ' <span class="refs">'. $markers . '</span>';
1701         } else {
1702                 return "";
1703         }
1704 }
1705
1706 # format, perhaps shortened and with markers, title line
1707 sub format_subject_html {
1708         my ($long, $short, $href, $extra) = @_;
1709         $extra = '' unless defined($extra);
1710
1711         if (length($short) < length($long)) {
1712                 $long =~ s/[[:cntrl:]]/?/g;
1713                 return $cgi->a({-href => $href, -class => "list subject",
1714                                 -title => to_utf8($long)},
1715                        esc_html($short)) . $extra;
1716         } else {
1717                 return $cgi->a({-href => $href, -class => "list subject"},
1718                        esc_html($long)) . $extra;
1719         }
1720 }
1721
1722 # Rather than recomputing the url for an email multiple times, we cache it
1723 # after the first hit. This gives a visible benefit in views where the avatar
1724 # for the same email is used repeatedly (e.g. shortlog).
1725 # The cache is shared by all avatar engines (currently gravatar only), which
1726 # are free to use it as preferred. Since only one avatar engine is used for any
1727 # given page, there's no risk for cache conflicts.
1728 our %avatar_cache = ();
1729
1730 # Compute the picon url for a given email, by using the picon search service over at
1731 # http://www.cs.indiana.edu/picons/search.html
1732 sub picon_url {
1733         my $email = lc shift;
1734         if (!$avatar_cache{$email}) {
1735                 my ($user, $domain) = split('@', $email);
1736                 $avatar_cache{$email} =
1737                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1738                         "$domain/$user/" .
1739                         "users+domains+unknown/up/single";
1740         }
1741         return $avatar_cache{$email};
1742 }
1743
1744 # Compute the gravatar url for a given email, if it's not in the cache already.
1745 # Gravatar stores only the part of the URL before the size, since that's the
1746 # one computationally more expensive. This also allows reuse of the cache for
1747 # different sizes (for this particular engine).
1748 sub gravatar_url {
1749         my $email = lc shift;
1750         my $size = shift;
1751         $avatar_cache{$email} ||=
1752                 "http://www.gravatar.com/avatar/" .
1753                         Digest::MD5::md5_hex($email) . "?s=";
1754         return $avatar_cache{$email} . $size;
1755 }
1756
1757 # Insert an avatar for the given $email at the given $size if the feature
1758 # is enabled.
1759 sub git_get_avatar {
1760         my ($email, %opts) = @_;
1761         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1762         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1763         $opts{-size} ||= 'default';
1764         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1765         my $url = "";
1766         if ($git_avatar eq 'gravatar') {
1767                 $url = gravatar_url($email, $size);
1768         } elsif ($git_avatar eq 'picon') {
1769                 $url = picon_url($email);
1770         }
1771         # Other providers can be added by extending the if chain, defining $url
1772         # as needed. If no variant puts something in $url, we assume avatars
1773         # are completely disabled/unavailable.
1774         if ($url) {
1775                 return $pre_white .
1776                        "<img width=\"$size\" " .
1777                             "class=\"avatar\" " .
1778                             "src=\"$url\" " .
1779                             "alt=\"\" " .
1780                        "/>" . $post_white;
1781         } else {
1782                 return "";
1783         }
1784 }
1785
1786 sub format_search_author {
1787         my ($author, $searchtype, $displaytext) = @_;
1788         my $have_search = gitweb_check_feature('search');
1789
1790         if ($have_search) {
1791                 my $performed = "";
1792                 if ($searchtype eq 'author') {
1793                         $performed = "authored";
1794                 } elsif ($searchtype eq 'committer') {
1795                         $performed = "committed";
1796                 }
1797
1798                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1799                                 searchtext=>$author,
1800                                 searchtype=>$searchtype), class=>"list",
1801                                 title=>"Search for commits $performed by $author"},
1802                                 $displaytext);
1803
1804         } else {
1805                 return $displaytext;
1806         }
1807 }
1808
1809 # format the author name of the given commit with the given tag
1810 # the author name is chopped and escaped according to the other
1811 # optional parameters (see chop_str).
1812 sub format_author_html {
1813         my $tag = shift;
1814         my $co = shift;
1815         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1816         return "<$tag class=\"author\">" .
1817                format_search_author($co->{'author_name'}, "author",
1818                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1819                        $author) .
1820                "</$tag>";
1821 }
1822
1823 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1824 sub format_git_diff_header_line {
1825         my $line = shift;
1826         my $diffinfo = shift;
1827         my ($from, $to) = @_;
1828
1829         if ($diffinfo->{'nparents'}) {
1830                 # combined diff
1831                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1832                 if ($to->{'href'}) {
1833                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1834                                          esc_path($to->{'file'}));
1835                 } else { # file was deleted (no href)
1836                         $line .= esc_path($to->{'file'});
1837                 }
1838         } else {
1839                 # "ordinary" diff
1840                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1841                 if ($from->{'href'}) {
1842                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1843                                          'a/' . esc_path($from->{'file'}));
1844                 } else { # file was added (no href)
1845                         $line .= 'a/' . esc_path($from->{'file'});
1846                 }
1847                 $line .= ' ';
1848                 if ($to->{'href'}) {
1849                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1850                                          'b/' . esc_path($to->{'file'}));
1851                 } else { # file was deleted
1852                         $line .= 'b/' . esc_path($to->{'file'});
1853                 }
1854         }
1855
1856         return "<div class=\"diff header\">$line</div>\n";
1857 }
1858
1859 # format extended diff header line, before patch itself
1860 sub format_extended_diff_header_line {
1861         my $line = shift;
1862         my $diffinfo = shift;
1863         my ($from, $to) = @_;
1864
1865         # match <path>
1866         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1867                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1868                                        esc_path($from->{'file'}));
1869         }
1870         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1871                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1872                                  esc_path($to->{'file'}));
1873         }
1874         # match single <mode>
1875         if ($line =~ m/\s(\d{6})$/) {
1876                 $line .= '<span class="info"> (' .
1877                          file_type_long($1) .
1878                          ')</span>';
1879         }
1880         # match <hash>
1881         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1882                 # can match only for combined diff
1883                 $line = 'index ';
1884                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1885                         if ($from->{'href'}[$i]) {
1886                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1887                                                   -class=>"hash"},
1888                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1889                         } else {
1890                                 $line .= '0' x 7;
1891                         }
1892                         # separator
1893                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1894                 }
1895                 $line .= '..';
1896                 if ($to->{'href'}) {
1897                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1898                                          substr($diffinfo->{'to_id'},0,7));
1899                 } else {
1900                         $line .= '0' x 7;
1901                 }
1902
1903         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1904                 # can match only for ordinary diff
1905                 my ($from_link, $to_link);
1906                 if ($from->{'href'}) {
1907                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1908                                              substr($diffinfo->{'from_id'},0,7));
1909                 } else {
1910                         $from_link = '0' x 7;
1911                 }
1912                 if ($to->{'href'}) {
1913                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1914                                            substr($diffinfo->{'to_id'},0,7));
1915                 } else {
1916                         $to_link = '0' x 7;
1917                 }
1918                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1919                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1920         }
1921
1922         return $line . "<br/>\n";
1923 }
1924
1925 # format from-file/to-file diff header
1926 sub format_diff_from_to_header {
1927         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1928         my $line;
1929         my $result = '';
1930
1931         $line = $from_line;
1932         #assert($line =~ m/^---/) if DEBUG;
1933         # no extra formatting for "^--- /dev/null"
1934         if (! $diffinfo->{'nparents'}) {
1935                 # ordinary (single parent) diff
1936                 if ($line =~ m!^--- "?a/!) {
1937                         if ($from->{'href'}) {
1938                                 $line = '--- a/' .
1939                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1940                                                 esc_path($from->{'file'}));
1941                         } else {
1942                                 $line = '--- a/' .
1943                                         esc_path($from->{'file'});
1944                         }
1945                 }
1946                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1947
1948         } else {
1949                 # combined diff (merge commit)
1950                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1951                         if ($from->{'href'}[$i]) {
1952                                 $line = '--- ' .
1953                                         $cgi->a({-href=>href(action=>"blobdiff",
1954                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1955                                                              hash_parent_base=>$parents[$i],
1956                                                              file_parent=>$from->{'file'}[$i],
1957                                                              hash=>$diffinfo->{'to_id'},
1958                                                              hash_base=>$hash,
1959                                                              file_name=>$to->{'file'}),
1960                                                  -class=>"path",
1961                                                  -title=>"diff" . ($i+1)},
1962                                                 $i+1) .
1963                                         '/' .
1964                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1965                                                 esc_path($from->{'file'}[$i]));
1966                         } else {
1967                                 $line = '--- /dev/null';
1968                         }
1969                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1970                 }
1971         }
1972
1973         $line = $to_line;
1974         #assert($line =~ m/^\+\+\+/) if DEBUG;
1975         # no extra formatting for "^+++ /dev/null"
1976         if ($line =~ m!^\+\+\+ "?b/!) {
1977                 if ($to->{'href'}) {
1978                         $line = '+++ b/' .
1979                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1980                                         esc_path($to->{'file'}));
1981                 } else {
1982                         $line = '+++ b/' .
1983                                 esc_path($to->{'file'});
1984                 }
1985         }
1986         $result .= qq!<div class="diff to_file">$line</div>\n!;
1987
1988         return $result;
1989 }
1990
1991 # create note for patch simplified by combined diff
1992 sub format_diff_cc_simplified {
1993         my ($diffinfo, @parents) = @_;
1994         my $result = '';
1995
1996         $result .= "<div class=\"diff header\">" .
1997                    "diff --cc ";
1998         if (!is_deleted($diffinfo)) {
1999                 $result .= $cgi->a({-href => href(action=>"blob",
2000                                                   hash_base=>$hash,
2001                                                   hash=>$diffinfo->{'to_id'},
2002                                                   file_name=>$diffinfo->{'to_file'}),
2003                                     -class => "path"},
2004                                    esc_path($diffinfo->{'to_file'}));
2005         } else {
2006                 $result .= esc_path($diffinfo->{'to_file'});
2007         }
2008         $result .= "</div>\n" . # class="diff header"
2009                    "<div class=\"diff nodifferences\">" .
2010                    "Simple merge" .
2011                    "</div>\n"; # class="diff nodifferences"
2012
2013         return $result;
2014 }
2015
2016 # format patch (diff) line (not to be used for diff headers)
2017 sub format_diff_line {
2018         my $line = shift;
2019         my ($from, $to) = @_;
2020         my $diff_class = "";
2021
2022         chomp $line;
2023
2024         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2025                 # combined diff
2026                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2027                 if ($line =~ m/^\@{3}/) {
2028                         $diff_class = " chunk_header";
2029                 } elsif ($line =~ m/^\\/) {
2030                         $diff_class = " incomplete";
2031                 } elsif ($prefix =~ tr/+/+/) {
2032                         $diff_class = " add";
2033                 } elsif ($prefix =~ tr/-/-/) {
2034                         $diff_class = " rem";
2035                 }
2036         } else {
2037                 # assume ordinary diff
2038                 my $char = substr($line, 0, 1);
2039                 if ($char eq '+') {
2040                         $diff_class = " add";
2041                 } elsif ($char eq '-') {
2042                         $diff_class = " rem";
2043                 } elsif ($char eq '@') {
2044                         $diff_class = " chunk_header";
2045                 } elsif ($char eq "\\") {
2046                         $diff_class = " incomplete";
2047                 }
2048         }
2049         $line = untabify($line);
2050         if ($from && $to && $line =~ m/^\@{2} /) {
2051                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2052                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2053
2054                 $from_lines = 0 unless defined $from_lines;
2055                 $to_lines   = 0 unless defined $to_lines;
2056
2057                 if ($from->{'href'}) {
2058                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2059                                              -class=>"list"}, $from_text);
2060                 }
2061                 if ($to->{'href'}) {
2062                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2063                                              -class=>"list"}, $to_text);
2064                 }
2065                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2066                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2067                 return "<div class=\"diff$diff_class\">$line</div>\n";
2068         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2069                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2070                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2071
2072                 @from_text = split(' ', $ranges);
2073                 for (my $i = 0; $i < @from_text; ++$i) {
2074                         ($from_start[$i], $from_nlines[$i]) =
2075                                 (split(',', substr($from_text[$i], 1)), 0);
2076                 }
2077
2078                 $to_text   = pop @from_text;
2079                 $to_start  = pop @from_start;
2080                 $to_nlines = pop @from_nlines;
2081
2082                 $line = "<span class=\"chunk_info\">$prefix ";
2083                 for (my $i = 0; $i < @from_text; ++$i) {
2084                         if ($from->{'href'}[$i]) {
2085                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2086                                                   -class=>"list"}, $from_text[$i]);
2087                         } else {
2088                                 $line .= $from_text[$i];
2089                         }
2090                         $line .= " ";
2091                 }
2092                 if ($to->{'href'}) {
2093                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2094                                           -class=>"list"}, $to_text);
2095                 } else {
2096                         $line .= $to_text;
2097                 }
2098                 $line .= " $prefix</span>" .
2099                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2100                 return "<div class=\"diff$diff_class\">$line</div>\n";
2101         }
2102         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2103 }
2104
2105 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2106 # linked.  Pass the hash of the tree/commit to snapshot.
2107 sub format_snapshot_links {
2108         my ($hash) = @_;
2109         my $num_fmts = @snapshot_fmts;
2110         if ($num_fmts > 1) {
2111                 # A parenthesized list of links bearing format names.
2112                 # e.g. "snapshot (_tar.gz_ _zip_)"
2113                 return "snapshot (" . join(' ', map
2114                         $cgi->a({
2115                                 -href => href(
2116                                         action=>"snapshot",
2117                                         hash=>$hash,
2118                                         snapshot_format=>$_
2119                                 )
2120                         }, $known_snapshot_formats{$_}{'display'})
2121                 , @snapshot_fmts) . ")";
2122         } elsif ($num_fmts == 1) {
2123                 # A single "snapshot" link whose tooltip bears the format name.
2124                 # i.e. "_snapshot_"
2125                 my ($fmt) = @snapshot_fmts;
2126                 return
2127                         $cgi->a({
2128                                 -href => href(
2129                                         action=>"snapshot",
2130                                         hash=>$hash,
2131                                         snapshot_format=>$fmt
2132                                 ),
2133                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2134                         }, "snapshot");
2135         } else { # $num_fmts == 0
2136                 return undef;
2137         }
2138 }
2139
2140 ## ......................................................................
2141 ## functions returning values to be passed, perhaps after some
2142 ## transformation, to other functions; e.g. returning arguments to href()
2143
2144 # returns hash to be passed to href to generate gitweb URL
2145 # in -title key it returns description of link
2146 sub get_feed_info {
2147         my $format = shift || 'Atom';
2148         my %res = (action => lc($format));
2149
2150         # feed links are possible only for project views
2151         return unless (defined $project);
2152         # some views should link to OPML, or to generic project feed,
2153         # or don't have specific feed yet (so they should use generic)
2154         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2155
2156         my $branch;
2157         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2158         # from tag links; this also makes possible to detect branch links
2159         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2160             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2161                 $branch = $1;
2162         }
2163         # find log type for feed description (title)
2164         my $type = 'log';
2165         if (defined $file_name) {
2166                 $type  = "history of $file_name";
2167                 $type .= "/" if ($action eq 'tree');
2168                 $type .= " on '$branch'" if (defined $branch);
2169         } else {
2170                 $type = "log of $branch" if (defined $branch);
2171         }
2172
2173         $res{-title} = $type;
2174         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2175         $res{'file_name'} = $file_name;
2176
2177         return %res;
2178 }
2179
2180 ## ----------------------------------------------------------------------
2181 ## git utility subroutines, invoking git commands
2182
2183 # returns path to the core git executable and the --git-dir parameter as list
2184 sub git_cmd {
2185         $number_of_git_cmds++;
2186         return $GIT, '--git-dir='.$git_dir;
2187 }
2188
2189 # quote the given arguments for passing them to the shell
2190 # quote_command("command", "arg 1", "arg with ' and ! characters")
2191 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2192 # Try to avoid using this function wherever possible.
2193 sub quote_command {
2194         return join(' ',
2195                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2196 }
2197
2198 # get HEAD ref of given project as hash
2199 sub git_get_head_hash {
2200         return git_get_full_hash(shift, 'HEAD');
2201 }
2202
2203 sub git_get_full_hash {
2204         return git_get_hash(@_);
2205 }
2206
2207 sub git_get_short_hash {
2208         return git_get_hash(@_, '--short=7');
2209 }
2210
2211 sub git_get_hash {
2212         my ($project, $hash, @options) = @_;
2213         my $o_git_dir = $git_dir;
2214         my $retval = undef;
2215         $git_dir = "$projectroot/$project";
2216         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2217             '--verify', '-q', @options, $hash) {
2218                 $retval = <$fd>;
2219                 chomp $retval if defined $retval;
2220                 close $fd;
2221         }
2222         if (defined $o_git_dir) {
2223                 $git_dir = $o_git_dir;
2224         }
2225         return $retval;
2226 }
2227
2228 # get type of given object
2229 sub git_get_type {
2230         my $hash = shift;
2231
2232         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2233         my $type = <$fd>;
2234         close $fd or return;
2235         chomp $type;
2236         return $type;
2237 }
2238
2239 # repository configuration
2240 our $config_file = '';
2241 our %config;
2242
2243 # store multiple values for single key as anonymous array reference
2244 # single values stored directly in the hash, not as [ <value> ]
2245 sub hash_set_multi {
2246         my ($hash, $key, $value) = @_;
2247
2248         if (!exists $hash->{$key}) {
2249                 $hash->{$key} = $value;
2250         } elsif (!ref $hash->{$key}) {
2251                 $hash->{$key} = [ $hash->{$key}, $value ];
2252         } else {
2253                 push @{$hash->{$key}}, $value;
2254         }
2255 }
2256
2257 # return hash of git project configuration
2258 # optionally limited to some section, e.g. 'gitweb'
2259 sub git_parse_project_config {
2260         my $section_regexp = shift;
2261         my %config;
2262
2263         local $/ = "\0";
2264
2265         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2266                 or return;
2267
2268         while (my $keyval = <$fh>) {
2269                 chomp $keyval;
2270                 my ($key, $value) = split(/\n/, $keyval, 2);
2271
2272                 hash_set_multi(\%config, $key, $value)
2273                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2274         }
2275         close $fh;
2276
2277         return %config;
2278 }
2279
2280 # convert config value to boolean: 'true' or 'false'
2281 # no value, number > 0, 'true' and 'yes' values are true
2282 # rest of values are treated as false (never as error)
2283 sub config_to_bool {
2284         my $val = shift;
2285
2286         return 1 if !defined $val;             # section.key
2287
2288         # strip leading and trailing whitespace
2289         $val =~ s/^\s+//;
2290         $val =~ s/\s+$//;
2291
2292         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2293                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2294 }
2295
2296 # convert config value to simple decimal number
2297 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2298 # to be multiplied by 1024, 1048576, or 1073741824
2299 sub config_to_int {
2300         my $val = shift;
2301
2302         # strip leading and trailing whitespace
2303         $val =~ s/^\s+//;
2304         $val =~ s/\s+$//;
2305
2306         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2307                 $unit = lc($unit);
2308                 # unknown unit is treated as 1
2309                 return $num * ($unit eq 'g' ? 1073741824 :
2310                                $unit eq 'm' ?    1048576 :
2311                                $unit eq 'k' ?       1024 : 1);
2312         }
2313         return $val;
2314 }
2315
2316 # convert config value to array reference, if needed
2317 sub config_to_multi {
2318         my $val = shift;
2319
2320         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2321 }
2322
2323 sub git_get_project_config {
2324         my ($key, $type) = @_;
2325
2326         return unless defined $git_dir;
2327
2328         # key sanity check
2329         return unless ($key);
2330         $key =~ s/^gitweb\.//;
2331         return if ($key =~ m/\W/);
2332
2333         # type sanity check
2334         if (defined $type) {
2335                 $type =~ s/^--//;
2336                 $type = undef
2337                         unless ($type eq 'bool' || $type eq 'int');
2338         }
2339
2340         # get config
2341         if (!defined $config_file ||
2342             $config_file ne "$git_dir/config") {
2343                 %config = git_parse_project_config('gitweb');
2344                 $config_file = "$git_dir/config";
2345         }
2346
2347         # check if config variable (key) exists
2348         return unless exists $config{"gitweb.$key"};
2349
2350         # ensure given type
2351         if (!defined $type) {
2352                 return $config{"gitweb.$key"};
2353         } elsif ($type eq 'bool') {
2354                 # backward compatibility: 'git config --bool' returns true/false
2355                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2356         } elsif ($type eq 'int') {
2357                 return config_to_int($config{"gitweb.$key"});
2358         }
2359         return $config{"gitweb.$key"};
2360 }
2361
2362 # get hash of given path at given ref
2363 sub git_get_hash_by_path {
2364         my $base = shift;
2365         my $path = shift || return undef;
2366         my $type = shift;
2367
2368         $path =~ s,/+$,,;
2369
2370         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2371                 or die_error(500, "Open git-ls-tree failed");
2372         my $line = <$fd>;
2373         close $fd or return undef;
2374
2375         if (!defined $line) {
2376                 # there is no tree or hash given by $path at $base
2377                 return undef;
2378         }
2379
2380         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2381         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2382         if (defined $type && $type ne $2) {
2383                 # type doesn't match
2384                 return undef;
2385         }
2386         return $3;
2387 }
2388
2389 # get path of entry with given hash at given tree-ish (ref)
2390 # used to get 'from' filename for combined diff (merge commit) for renames
2391 sub git_get_path_by_hash {
2392         my $base = shift || return;
2393         my $hash = shift || return;
2394
2395         local $/ = "\0";
2396
2397         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2398                 or return undef;
2399         while (my $line = <$fd>) {
2400                 chomp $line;
2401
2402                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2403                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2404                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2405                         close $fd;
2406                         return $1;
2407                 }
2408         }
2409         close $fd;
2410         return undef;
2411 }
2412
2413 ## ......................................................................
2414 ## git utility functions, directly accessing git repository
2415
2416 sub git_get_project_description {
2417         my $path = shift;
2418
2419         $git_dir = "$projectroot/$path";
2420         open my $fd, '<', "$git_dir/description"
2421                 or return git_get_project_config('description');
2422         my $descr = <$fd>;
2423         close $fd;
2424         if (defined $descr) {
2425                 chomp $descr;
2426         }
2427         return $descr;
2428 }
2429
2430 sub git_get_project_ctags {
2431         my $path = shift;
2432         my $ctags = {};
2433
2434         $git_dir = "$projectroot/$path";
2435         opendir my $dh, "$git_dir/ctags"
2436                 or return $ctags;
2437         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2438                 open my $ct, '<', $_ or next;
2439                 my $val = <$ct>;
2440                 chomp $val;
2441                 close $ct;
2442                 my $ctag = $_; $ctag =~ s#.*/##;
2443                 $ctags->{$ctag} = $val;
2444         }
2445         closedir $dh;
2446         $ctags;
2447 }
2448
2449 sub git_populate_project_tagcloud {
2450         my $ctags = shift;
2451
2452         # First, merge different-cased tags; tags vote on casing
2453         my %ctags_lc;
2454         foreach (keys %$ctags) {
2455                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2456                 if (not $ctags_lc{lc $_}->{topcount}
2457                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2458                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2459                         $ctags_lc{lc $_}->{topname} = $_;
2460                 }
2461         }
2462
2463         my $cloud;
2464         if (eval { require HTML::TagCloud; 1; }) {
2465                 $cloud = HTML::TagCloud->new;
2466                 foreach (sort keys %ctags_lc) {
2467                         # Pad the title with spaces so that the cloud looks
2468                         # less crammed.
2469                         my $title = $ctags_lc{$_}->{topname};
2470                         $title =~ s/ /&nbsp;/g;
2471                         $title =~ s/^/&nbsp;/g;
2472                         $title =~ s/$/&nbsp;/g;
2473                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2474                 }
2475         } else {
2476                 $cloud = \%ctags_lc;
2477         }
2478         $cloud;
2479 }
2480
2481 sub git_show_project_tagcloud {
2482         my ($cloud, $count) = @_;
2483         print STDERR ref($cloud)."..\n";
2484         if (ref $cloud eq 'HTML::TagCloud') {
2485                 return $cloud->html_and_css($count);
2486         } else {
2487                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2488                 return '<p align="center">' . join (', ', map {
2489                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2490                 } splice(@tags, 0, $count)) . '</p>';
2491         }
2492 }
2493
2494 sub git_get_project_url_list {
2495         my $path = shift;
2496
2497         $git_dir = "$projectroot/$path";
2498         open my $fd, '<', "$git_dir/cloneurl"
2499                 or return wantarray ?
2500                 @{ config_to_multi(git_get_project_config('url')) } :
2501                    config_to_multi(git_get_project_config('url'));
2502         my @git_project_url_list = map { chomp; $_ } <$fd>;
2503         close $fd;
2504
2505         return wantarray ? @git_project_url_list : \@git_project_url_list;
2506 }
2507
2508 sub git_get_projects_list {
2509         my ($filter) = @_;
2510         my @list;
2511
2512         $filter ||= '';
2513         $filter =~ s/\.git$//;
2514
2515         my $check_forks = gitweb_check_feature('forks');
2516
2517         if (-d $projects_list) {
2518                 # search in directory
2519                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2520                 # remove the trailing "/"
2521                 $dir =~ s!/+$!!;
2522                 my $pfxlen = length("$dir");
2523                 my $pfxdepth = ($dir =~ tr!/!!);
2524
2525                 File::Find::find({
2526                         follow_fast => 1, # follow symbolic links
2527                         follow_skip => 2, # ignore duplicates
2528                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2529                         wanted => sub {
2530                                 # skip project-list toplevel, if we get it.
2531                                 return if (m!^[/.]$!);
2532                                 # only directories can be git repositories
2533                                 return unless (-d $_);
2534                                 # don't traverse too deep (Find is super slow on os x)
2535                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2536                                         $File::Find::prune = 1;
2537                                         return;
2538                                 }
2539
2540                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2541                                 # we check related file in $projectroot
2542                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2543                                 if (check_export_ok("$projectroot/$path")) {
2544                                         push @list, { path => $path };
2545                                         $File::Find::prune = 1;
2546                                 }
2547                         },
2548                 }, "$dir");
2549
2550         } elsif (-f $projects_list) {
2551                 # read from file(url-encoded):
2552                 # 'git%2Fgit.git Linus+Torvalds'
2553                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2554                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2555                 my %paths;
2556                 open my $fd, '<', $projects_list or return;
2557         PROJECT:
2558                 while (my $line = <$fd>) {
2559                         chomp $line;
2560                         my ($path, $owner) = split ' ', $line;
2561                         $path = unescape($path);
2562                         $owner = unescape($owner);
2563                         if (!defined $path) {
2564                                 next;
2565                         }
2566                         if ($filter ne '') {
2567                                 # looking for forks;
2568                                 my $pfx = substr($path, 0, length($filter));
2569                                 if ($pfx ne $filter) {
2570                                         next PROJECT;
2571                                 }
2572                                 my $sfx = substr($path, length($filter));
2573                                 if ($sfx !~ /^\/.*\.git$/) {
2574                                         next PROJECT;
2575                                 }
2576                         } elsif ($check_forks) {
2577                         PATH:
2578                                 foreach my $filter (keys %paths) {
2579                                         # looking for forks;
2580                                         my $pfx = substr($path, 0, length($filter));
2581                                         if ($pfx ne $filter) {
2582                                                 next PATH;
2583                                         }
2584                                         my $sfx = substr($path, length($filter));
2585                                         if ($sfx !~ /^\/.*\.git$/) {
2586                                                 next PATH;
2587                                         }
2588                                         # is a fork, don't include it in
2589                                         # the list
2590                                         next PROJECT;
2591                                 }
2592                         }
2593                         if (check_export_ok("$projectroot/$path")) {
2594                                 my $pr = {
2595                                         path => $path,
2596                                         owner => to_utf8($owner),
2597                                 };
2598                                 push @list, $pr;
2599                                 (my $forks_path = $path) =~ s/\.git$//;
2600                                 $paths{$forks_path}++;
2601                         }
2602                 }
2603                 close $fd;
2604         }
2605         return @list;
2606 }
2607
2608 our $gitweb_project_owner = undef;
2609 sub git_get_project_list_from_file {
2610
2611         return if (defined $gitweb_project_owner);
2612
2613         $gitweb_project_owner = {};
2614         # read from file (url-encoded):
2615         # 'git%2Fgit.git Linus+Torvalds'
2616         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2617         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2618         if (-f $projects_list) {
2619                 open(my $fd, '<', $projects_list);
2620                 while (my $line = <$fd>) {
2621                         chomp $line;
2622                         my ($pr, $ow) = split ' ', $line;
2623                         $pr = unescape($pr);
2624                         $ow = unescape($ow);
2625                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2626                 }
2627                 close $fd;
2628         }
2629 }
2630
2631 sub git_get_project_owner {
2632         my $project = shift;
2633         my $owner;
2634
2635         return undef unless $project;
2636         $git_dir = "$projectroot/$project";
2637
2638         if (!defined $gitweb_project_owner) {
2639                 git_get_project_list_from_file();
2640         }
2641
2642         if (exists $gitweb_project_owner->{$project}) {
2643                 $owner = $gitweb_project_owner->{$project};
2644         }
2645         if (!defined $owner){
2646                 $owner = git_get_project_config('owner');
2647         }
2648         if (!defined $owner) {
2649                 $owner = get_file_owner("$git_dir");
2650         }
2651
2652         return $owner;
2653 }
2654
2655 sub git_get_last_activity {
2656         my ($path) = @_;
2657         my $fd;
2658
2659         $git_dir = "$projectroot/$path";
2660         open($fd, "-|", git_cmd(), 'for-each-ref',
2661              '--format=%(committer)',
2662              '--sort=-committerdate',
2663              '--count=1',
2664              'refs/heads') or return;
2665         my $most_recent = <$fd>;
2666         close $fd or return;
2667         if (defined $most_recent &&
2668             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2669                 my $timestamp = $1;
2670                 my $age = time - $timestamp;
2671                 return ($age, age_string($age));
2672         }
2673         return (undef, undef);
2674 }
2675
2676 sub git_get_references {
2677         my $type = shift || "";
2678         my %refs;
2679         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2680         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2681         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2682                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2683                 or return;
2684
2685         while (my $line = <$fd>) {
2686                 chomp $line;
2687                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2688                         if (defined $refs{$1}) {
2689                                 push @{$refs{$1}}, $2;
2690                         } else {
2691                                 $refs{$1} = [ $2 ];
2692                         }
2693                 }
2694         }
2695         close $fd or return;
2696         return \%refs;
2697 }
2698
2699 sub git_get_rev_name_tags {
2700         my $hash = shift || return undef;
2701
2702         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2703                 or return;
2704         my $name_rev = <$fd>;
2705         close $fd;
2706
2707         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2708                 return $1;
2709         } else {
2710                 # catches also '$hash undefined' output
2711                 return undef;
2712         }
2713 }
2714
2715 ## ----------------------------------------------------------------------
2716 ## parse to hash functions
2717
2718 sub parse_date {
2719         my $epoch = shift;
2720         my $tz = shift || "-0000";
2721
2722         my %date;
2723         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2724         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2725         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2726         $date{'hour'} = $hour;
2727         $date{'minute'} = $min;
2728         $date{'mday'} = $mday;
2729         $date{'day'} = $days[$wday];
2730         $date{'month'} = $months[$mon];
2731         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2732                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2733         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2734                              $mday, $months[$mon], $hour ,$min;
2735         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2736                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2737
2738         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2739         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2740         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2741         $date{'hour_local'} = $hour;
2742         $date{'minute_local'} = $min;
2743         $date{'tz_local'} = $tz;
2744         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2745                                   1900+$year, $mon+1, $mday,
2746                                   $hour, $min, $sec, $tz);
2747         return %date;
2748 }
2749
2750 sub parse_tag {
2751         my $tag_id = shift;
2752         my %tag;
2753         my @comment;
2754
2755         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2756         $tag{'id'} = $tag_id;
2757         while (my $line = <$fd>) {
2758                 chomp $line;
2759                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2760                         $tag{'object'} = $1;
2761                 } elsif ($line =~ m/^type (.+)$/) {
2762                         $tag{'type'} = $1;
2763                 } elsif ($line =~ m/^tag (.+)$/) {
2764                         $tag{'name'} = $1;
2765                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2766                         $tag{'author'} = $1;
2767                         $tag{'author_epoch'} = $2;
2768                         $tag{'author_tz'} = $3;
2769                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2770                                 $tag{'author_name'}  = $1;
2771                                 $tag{'author_email'} = $2;
2772                         } else {
2773                                 $tag{'author_name'} = $tag{'author'};
2774                         }
2775                 } elsif ($line =~ m/--BEGIN/) {
2776                         push @comment, $line;
2777                         last;
2778                 } elsif ($line eq "") {
2779                         last;
2780                 }
2781         }
2782         push @comment, <$fd>;
2783         $tag{'comment'} = \@comment;
2784         close $fd or return;
2785         if (!defined $tag{'name'}) {
2786                 return
2787         };
2788         return %tag
2789 }
2790
2791 sub parse_commit_text {
2792         my ($commit_text, $withparents) = @_;
2793         my @commit_lines = split '\n', $commit_text;
2794         my %co;
2795
2796         pop @commit_lines; # Remove '\0'
2797
2798         if (! @commit_lines) {
2799                 return;
2800         }
2801
2802         my $header = shift @commit_lines;
2803         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2804                 return;
2805         }
2806         ($co{'id'}, my @parents) = split ' ', $header;
2807         while (my $line = shift @commit_lines) {
2808                 last if $line eq "\n";
2809                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2810                         $co{'tree'} = $1;
2811                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2812                         push @parents, $1;
2813                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2814                         $co{'author'} = to_utf8($1);
2815                         $co{'author_epoch'} = $2;
2816                         $co{'author_tz'} = $3;
2817                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2818                                 $co{'author_name'}  = $1;
2819                                 $co{'author_email'} = $2;
2820                         } else {
2821                                 $co{'author_name'} = $co{'author'};
2822                         }
2823                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2824                         $co{'committer'} = to_utf8($1);
2825                         $co{'committer_epoch'} = $2;
2826                         $co{'committer_tz'} = $3;
2827                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2828                                 $co{'committer_name'}  = $1;
2829                                 $co{'committer_email'} = $2;
2830                         } else {
2831                                 $co{'committer_name'} = $co{'committer'};
2832                         }
2833                 }
2834         }
2835         if (!defined $co{'tree'}) {
2836                 return;
2837         };
2838         $co{'parents'} = \@parents;
2839         $co{'parent'} = $parents[0];
2840
2841         foreach my $title (@commit_lines) {
2842                 $title =~ s/^    //;
2843                 if ($title ne "") {
2844                         $co{'title'} = chop_str($title, 80, 5);
2845                         # remove leading stuff of merges to make the interesting part visible
2846                         if (length($title) > 50) {
2847                                 $title =~ s/^Automatic //;
2848                                 $title =~ s/^merge (of|with) /Merge ... /i;
2849                                 if (length($title) > 50) {
2850                                         $title =~ s/(http|rsync):\/\///;
2851                                 }
2852                                 if (length($title) > 50) {
2853                                         $title =~ s/(master|www|rsync)\.//;
2854                                 }
2855                                 if (length($title) > 50) {
2856                                         $title =~ s/kernel.org:?//;
2857                                 }
2858                                 if (length($title) > 50) {
2859                                         $title =~ s/\/pub\/scm//;
2860                                 }
2861                         }
2862                         $co{'title_short'} = chop_str($title, 50, 5);
2863                         last;
2864                 }
2865         }
2866         if (! defined $co{'title'} || $co{'title'} eq "") {
2867                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2868         }
2869         # remove added spaces
2870         foreach my $line (@commit_lines) {
2871                 $line =~ s/^    //;
2872         }
2873         $co{'comment'} = \@commit_lines;
2874
2875         my $age = time - $co{'committer_epoch'};
2876         $co{'age'} = $age;
2877         $co{'age_string'} = age_string($age);
2878         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2879         if ($age > 60*60*24*7*2) {
2880                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2881                 $co{'age_string_age'} = $co{'age_string'};
2882         } else {
2883                 $co{'age_string_date'} = $co{'age_string'};
2884                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2885         }
2886         return %co;
2887 }
2888
2889 sub parse_commit {
2890         my ($commit_id) = @_;
2891         my %co;
2892
2893         local $/ = "\0";
2894
2895         open my $fd, "-|", git_cmd(), "rev-list",
2896                 "--parents",
2897                 "--header",
2898                 "--max-count=1",
2899                 $commit_id,
2900                 "--",
2901                 or die_error(500, "Open git-rev-list failed");
2902         %co = parse_commit_text(<$fd>, 1);
2903         close $fd;
2904
2905         return %co;
2906 }
2907
2908 sub parse_commits {
2909         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2910         my @cos;
2911
2912         $maxcount ||= 1;
2913         $skip ||= 0;
2914
2915         local $/ = "\0";
2916
2917         open my $fd, "-|", git_cmd(), "rev-list",
2918                 "--header",
2919                 @args,
2920                 ("--max-count=" . $maxcount),
2921                 ("--skip=" . $skip),
2922                 @extra_options,
2923                 $commit_id,
2924                 "--",
2925                 ($filename ? ($filename) : ())
2926                 or die_error(500, "Open git-rev-list failed");
2927         while (my $line = <$fd>) {
2928                 my %co = parse_commit_text($line);
2929                 push @cos, \%co;
2930         }
2931         close $fd;
2932
2933         return wantarray ? @cos : \@cos;
2934 }
2935
2936 # parse line of git-diff-tree "raw" output
2937 sub parse_difftree_raw_line {
2938         my $line = shift;
2939         my %res;
2940
2941         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2942         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2943         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2944                 $res{'from_mode'} = $1;
2945                 $res{'to_mode'} = $2;
2946                 $res{'from_id'} = $3;
2947                 $res{'to_id'} = $4;
2948                 $res{'status'} = $5;
2949                 $res{'similarity'} = $6;
2950                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2951                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2952                 } else {
2953                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2954                 }
2955         }
2956         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2957         # combined diff (for merge commit)
2958         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2959                 $res{'nparents'}  = length($1);
2960                 $res{'from_mode'} = [ split(' ', $2) ];
2961                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2962                 $res{'from_id'} = [ split(' ', $3) ];
2963                 $res{'to_id'} = pop @{$res{'from_id'}};
2964                 $res{'status'} = [ split('', $4) ];
2965                 $res{'to_file'} = unquote($5);
2966         }
2967         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2968         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2969                 $res{'commit'} = $1;
2970         }
2971
2972         return wantarray ? %res : \%res;
2973 }
2974
2975 # wrapper: return parsed line of git-diff-tree "raw" output
2976 # (the argument might be raw line, or parsed info)
2977 sub parsed_difftree_line {
2978         my $line_or_ref = shift;
2979
2980         if (ref($line_or_ref) eq "HASH") {
2981                 # pre-parsed (or generated by hand)
2982                 return $line_or_ref;
2983         } else {
2984                 return parse_difftree_raw_line($line_or_ref);
2985         }
2986 }
2987
2988 # parse line of git-ls-tree output
2989 sub parse_ls_tree_line {
2990         my $line = shift;
2991         my %opts = @_;
2992         my %res;
2993
2994         if ($opts{'-l'}) {
2995                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2996                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2997
2998                 $res{'mode'} = $1;
2999                 $res{'type'} = $2;
3000                 $res{'hash'} = $3;
3001                 $res{'size'} = $4;
3002                 if ($opts{'-z'}) {
3003                         $res{'name'} = $5;
3004                 } else {
3005                         $res{'name'} = unquote($5);
3006                 }
3007         } else {
3008                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3009                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3010
3011                 $res{'mode'} = $1;
3012                 $res{'type'} = $2;
3013                 $res{'hash'} = $3;
3014                 if ($opts{'-z'}) {
3015                         $res{'name'} = $4;
3016                 } else {
3017                         $res{'name'} = unquote($4);
3018                 }
3019         }
3020
3021         return wantarray ? %res : \%res;
3022 }
3023
3024 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3025 sub parse_from_to_diffinfo {
3026         my ($diffinfo, $from, $to, @parents) = @_;
3027
3028         if ($diffinfo->{'nparents'}) {
3029                 # combined diff
3030                 $from->{'file'} = [];
3031                 $from->{'href'} = [];
3032                 fill_from_file_info($diffinfo, @parents)
3033                         unless exists $diffinfo->{'from_file'};
3034                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3035                         $from->{'file'}[$i] =
3036                                 defined $diffinfo->{'from_file'}[$i] ?
3037                                         $diffinfo->{'from_file'}[$i] :
3038                                         $diffinfo->{'to_file'};
3039                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3040                                 $from->{'href'}[$i] = href(action=>"blob",
3041                                                            hash_base=>$parents[$i],
3042                                                            hash=>$diffinfo->{'from_id'}[$i],
3043                                                            file_name=>$from->{'file'}[$i]);
3044                         } else {
3045                                 $from->{'href'}[$i] = undef;
3046                         }
3047                 }
3048         } else {
3049                 # ordinary (not combined) diff
3050                 $from->{'file'} = $diffinfo->{'from_file'};
3051                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3052                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3053                                                hash=>$diffinfo->{'from_id'},
3054                                                file_name=>$from->{'file'});
3055                 } else {
3056                         delete $from->{'href'};
3057                 }
3058         }
3059
3060         $to->{'file'} = $diffinfo->{'to_file'};
3061         if (!is_deleted($diffinfo)) { # file exists in result
3062                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3063                                      hash=>$diffinfo->{'to_id'},
3064                                      file_name=>$to->{'file'});
3065         } else {
3066                 delete $to->{'href'};
3067         }
3068 }
3069
3070 ## ......................................................................
3071 ## parse to array of hashes functions
3072
3073 sub git_get_heads_list {
3074         my $limit = shift;
3075         my @headslist;
3076
3077         open my $fd, '-|', git_cmd(), 'for-each-ref',
3078                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3079                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3080                 'refs/heads'
3081                 or return;
3082         while (my $line = <$fd>) {
3083                 my %ref_item;
3084
3085                 chomp $line;
3086                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3087                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3088                 my ($committer, $epoch, $tz) =
3089                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3090                 $ref_item{'fullname'}  = $name;
3091                 $name =~ s!^refs/heads/!!;
3092
3093                 $ref_item{'name'}  = $name;
3094                 $ref_item{'id'}    = $hash;
3095                 $ref_item{'title'} = $title || '(no commit message)';
3096                 $ref_item{'epoch'} = $epoch;
3097                 if ($epoch) {
3098                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3099                 } else {
3100                         $ref_item{'age'} = "unknown";
3101                 }
3102
3103                 push @headslist, \%ref_item;
3104         }
3105         close $fd;
3106
3107         return wantarray ? @headslist : \@headslist;
3108 }
3109
3110 sub git_get_tags_list {
3111         my $limit = shift;
3112         my @tagslist;
3113
3114         open my $fd, '-|', git_cmd(), 'for-each-ref',
3115                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3116                 '--format=%(objectname) %(objecttype) %(refname) '.
3117                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3118                 'refs/tags'
3119                 or return;
3120         while (my $line = <$fd>) {
3121                 my %ref_item;
3122
3123                 chomp $line;
3124                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3125                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3126                 my ($creator, $epoch, $tz) =
3127                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3128                 $ref_item{'fullname'} = $name;
3129                 $name =~ s!^refs/tags/!!;
3130
3131                 $ref_item{'type'} = $type;
3132                 $ref_item{'id'} = $id;
3133                 $ref_item{'name'} = $name;
3134                 if ($type eq "tag") {
3135                         $ref_item{'subject'} = $title;
3136                         $ref_item{'reftype'} = $reftype;
3137                         $ref_item{'refid'}   = $refid;
3138                 } else {
3139                         $ref_item{'reftype'} = $type;
3140                         $ref_item{'refid'}   = $id;
3141                 }
3142
3143                 if ($type eq "tag" || $type eq "commit") {
3144                         $ref_item{'epoch'} = $epoch;
3145                         if ($epoch) {
3146                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3147                         } else {
3148                                 $ref_item{'age'} = "unknown";
3149                         }
3150                 }
3151
3152                 push @tagslist, \%ref_item;
3153         }
3154         close $fd;
3155
3156         return wantarray ? @tagslist : \@tagslist;
3157 }
3158
3159 ## ----------------------------------------------------------------------
3160 ## filesystem-related functions
3161
3162 sub get_file_owner {
3163         my $path = shift;
3164
3165         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3166         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3167         if (!defined $gcos) {
3168                 return undef;
3169         }
3170         my $owner = $gcos;
3171         $owner =~ s/[,;].*$//;
3172         return to_utf8($owner);
3173 }
3174
3175 # assume that file exists
3176 sub insert_file {
3177         my $filename = shift;
3178
3179         open my $fd, '<', $filename;
3180         print map { to_utf8($_) } <$fd>;
3181         close $fd;
3182 }
3183
3184 ## ......................................................................
3185 ## mimetype related functions
3186
3187 sub mimetype_guess_file {
3188         my $filename = shift;
3189         my $mimemap = shift;
3190         -r $mimemap or return undef;
3191
3192         my %mimemap;
3193         open(my $mh, '<', $mimemap) or return undef;
3194         while (<$mh>) {
3195                 next if m/^#/; # skip comments
3196                 my ($mimetype, $exts) = split(/\t+/);
3197                 if (defined $exts) {
3198                         my @exts = split(/\s+/, $exts);
3199                         foreach my $ext (@exts) {
3200                                 $mimemap{$ext} = $mimetype;
3201                         }
3202                 }
3203         }
3204         close($mh);
3205
3206         $filename =~ /\.([^.]*)$/;
3207         return $mimemap{$1};
3208 }
3209
3210 sub mimetype_guess {
3211         my $filename = shift;
3212         my $mime;
3213         $filename =~ /\./ or return undef;
3214
3215         if ($mimetypes_file) {
3216                 my $file = $mimetypes_file;
3217                 if ($file !~ m!^/!) { # if it is relative path
3218                         # it is relative to project
3219                         $file = "$projectroot/$project/$file";
3220                 }
3221                 $mime = mimetype_guess_file($filename, $file);
3222         }
3223         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3224         return $mime;
3225 }
3226
3227 sub blob_mimetype {
3228         my $fd = shift;
3229         my $filename = shift;
3230
3231         if ($filename) {
3232                 my $mime = mimetype_guess($filename);
3233                 $mime and return $mime;
3234         }
3235
3236         # just in case
3237         return $default_blob_plain_mimetype unless $fd;
3238
3239         if (-T $fd) {
3240                 return 'text/plain';
3241         } elsif (! $filename) {
3242                 return 'application/octet-stream';
3243         } elsif ($filename =~ m/\.png$/i) {
3244                 return 'image/png';
3245         } elsif ($filename =~ m/\.gif$/i) {
3246                 return 'image/gif';
3247         } elsif ($filename =~ m/\.jpe?g$/i) {
3248                 return 'image/jpeg';
3249         } else {
3250                 return 'application/octet-stream';
3251         }
3252 }
3253
3254 sub blob_contenttype {
3255         my ($fd, $file_name, $type) = @_;
3256
3257         $type ||= blob_mimetype($fd, $file_name);
3258         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3259                 $type .= "; charset=$default_text_plain_charset";
3260         }
3261
3262         return $type;
3263 }
3264
3265 ## ======================================================================
3266 ## functions printing HTML: header, footer, error page
3267
3268 sub git_header_html {
3269         my $status = shift || "200 OK";
3270         my $expires = shift;
3271
3272         my $title = "$site_name";
3273         if (defined $project) {
3274                 $title .= " - " . to_utf8($project);
3275                 if (defined $action) {
3276                         $title .= "/$action";
3277                         if (defined $file_name) {
3278                                 $title .= " - " . esc_path($file_name);
3279                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3280                                         $title .= "/";
3281                                 }
3282                         }
3283                 }
3284         }
3285         my $content_type;
3286         # require explicit support from the UA if we are to send the page as
3287         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3288         # we have to do this because MSIE sometimes globs '*/*', pretending to
3289         # support xhtml+xml but choking when it gets what it asked for.
3290         if (defined $cgi->http('HTTP_ACCEPT') &&
3291             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3292             $cgi->Accept('application/xhtml+xml') != 0) {
3293                 $content_type = 'application/xhtml+xml';
3294         } else {
3295                 $content_type = 'text/html';
3296         }
3297         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3298                            -status=> $status, -expires => $expires);
3299         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3300         print <<EOF;
3301 <?xml version="1.0" encoding="utf-8"?>
3302 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3303 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3304 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3305 <!-- git core binaries version $git_version -->
3306 <head>
3307 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3308 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3309 <meta name="robots" content="index, nofollow"/>
3310 <title>$title</title>
3311 EOF
3312         # the stylesheet, favicon etc urls won't work correctly with path_info
3313         # unless we set the appropriate base URL
3314         if ($ENV{'PATH_INFO'}) {
3315                 print "<base href=\"".esc_url($base_url)."\" />\n";
3316         }
3317         # print out each stylesheet that exist, providing backwards capability
3318         # for those people who defined $stylesheet in a config file
3319         if (defined $stylesheet) {
3320                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3321         } else {
3322                 foreach my $stylesheet (@stylesheets) {
3323                         next unless $stylesheet;
3324                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3325                 }
3326         }
3327         if (defined $project) {
3328                 my %href_params = get_feed_info();
3329                 if (!exists $href_params{'-title'}) {
3330                         $href_params{'-title'} = 'log';
3331                 }
3332
3333                 foreach my $format qw(RSS Atom) {
3334                         my $type = lc($format);
3335                         my %link_attr = (
3336                                 '-rel' => 'alternate',
3337                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3338                                 '-type' => "application/$type+xml"
3339                         );
3340
3341                         $href_params{'action'} = $type;
3342                         $link_attr{'-href'} = href(%href_params);
3343                         print "<link ".
3344                               "rel=\"$link_attr{'-rel'}\" ".
3345                               "title=\"$link_attr{'-title'}\" ".
3346                               "href=\"$link_attr{'-href'}\" ".
3347                               "type=\"$link_attr{'-type'}\" ".
3348                               "/>\n";
3349
3350                         $href_params{'extra_options'} = '--no-merges';
3351                         $link_attr{'-href'} = href(%href_params);
3352                         $link_attr{'-title'} .= ' (no merges)';
3353                         print "<link ".
3354                               "rel=\"$link_attr{'-rel'}\" ".
3355                               "title=\"$link_attr{'-title'}\" ".
3356                               "href=\"$link_attr{'-href'}\" ".
3357                               "type=\"$link_attr{'-type'}\" ".
3358                               "/>\n";
3359                 }
3360
3361         } else {
3362                 printf('<link rel="alternate" title="%s projects list" '.
3363                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3364                        $site_name, href(project=>undef, action=>"project_index"));
3365                 printf('<link rel="alternate" title="%s projects feeds" '.
3366                        'href="%s" type="text/x-opml" />'."\n",
3367                        $site_name, href(project=>undef, action=>"opml"));
3368         }
3369         if (defined $favicon) {
3370                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3371         }
3372
3373         print "</head>\n" .
3374               "<body>\n";
3375
3376         if (defined $site_header && -f $site_header) {
3377                 insert_file($site_header);
3378         }
3379
3380         print "<div class=\"page_header\">\n" .
3381               $cgi->a({-href => esc_url($logo_url),
3382                        -title => $logo_label},
3383                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3384         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3385         if (defined $project) {
3386                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3387                 if (defined $action) {
3388                         print " / $action";
3389                 }
3390                 print "\n";
3391         }
3392         print "</div>\n";
3393
3394         my $have_search = gitweb_check_feature('search');
3395         if (defined $project && $have_search) {
3396                 if (!defined $searchtext) {
3397                         $searchtext = "";
3398                 }
3399                 my $search_hash;
3400                 if (defined $hash_base) {
3401                         $search_hash = $hash_base;
3402                 } elsif (defined $hash) {
3403                         $search_hash = $hash;
3404                 } else {
3405                         $search_hash = "HEAD";
3406                 }
3407                 my $action = $my_uri;
3408                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3409                 if ($use_pathinfo) {
3410                         $action .= "/".esc_url($project);
3411                 }
3412                 print $cgi->startform(-method => "get", -action => $action) .
3413                       "<div class=\"search\">\n" .
3414                       (!$use_pathinfo &&
3415                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3416                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3417                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3418                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3419                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3420                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3421                       " search:\n",
3422                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3423                       "<span title=\"Extended regular expression\">" .
3424                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3425                                      -checked => $search_use_regexp) .
3426                       "</span>" .
3427                       "</div>" .
3428                       $cgi->end_form() . "\n";
3429         }
3430 }
3431
3432 sub git_footer_html {
3433         my $feed_class = 'rss_logo';
3434
3435         print "<div class=\"page_footer\">\n";
3436         if (defined $project) {
3437                 my $descr = git_get_project_description($project);
3438                 if (defined $descr) {
3439                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3440                 }
3441
3442                 my %href_params = get_feed_info();
3443                 if (!%href_params) {
3444                         $feed_class .= ' generic';
3445                 }
3446                 $href_params{'-title'} ||= 'log';
3447
3448                 foreach my $format qw(RSS Atom) {
3449                         $href_params{'action'} = lc($format);
3450                         print $cgi->a({-href => href(%href_params),
3451                                       -title => "$href_params{'-title'} $format feed",
3452                                       -class => $feed_class}, $format)."\n";
3453                 }
3454
3455         } else {
3456                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3457                               -class => $feed_class}, "OPML") . " ";
3458                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3459                               -class => $feed_class}, "TXT") . "\n";
3460         }
3461         print "</div>\n"; # class="page_footer"
3462
3463         if (defined $t0 && gitweb_check_feature('timed')) {
3464                 print "<div id=\"generating_info\">\n";
3465                 print 'This page took '.
3466                       '<span id="generating_time" class="time_span">'.
3467                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3468                       ' seconds </span>'.
3469                       ' and '.
3470                       '<span id="generating_cmd">'.
3471                       $number_of_git_cmds.
3472                       '</span> git commands '.
3473                       " to generate.\n";
3474                 print "</div>\n"; # class="page_footer"
3475         }
3476
3477         if (defined $site_footer && -f $site_footer) {
3478                 insert_file($site_footer);
3479         }
3480
3481         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3482         if (defined $action &&
3483             $action eq 'blame_incremental') {
3484                 print qq!<script type="text/javascript">\n!.
3485                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3486                       qq!           "!. href() .qq!");\n!.
3487                       qq!</script>\n!;
3488         } elsif (gitweb_check_feature('javascript-actions')) {
3489                 print qq!<script type="text/javascript">\n!.
3490                       qq!window.onload = fixLinks;\n!.
3491                       qq!</script>\n!;
3492         }
3493
3494         print "</body>\n" .
3495               "</html>";
3496 }
3497
3498 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3499 # Example: die_error(404, 'Hash not found')
3500 # By convention, use the following status codes (as defined in RFC 2616):
3501 # 400: Invalid or missing CGI parameters, or
3502 #      requested object exists but has wrong type.
3503 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3504 #      this server or project.
3505 # 404: Requested object/revision/project doesn't exist.
3506 # 500: The server isn't configured properly, or
3507 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3508 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3509 # 503: The server is currently unavailable (because it is overloaded,
3510 #      or down for maintenance).  Generally, this is a temporary state.
3511 sub die_error {
3512         my $status = shift || 500;
3513         my $error = esc_html(shift) || "Internal Server Error";
3514         my $extra = shift;
3515
3516         my %http_responses = (
3517                 400 => '400 Bad Request',
3518                 403 => '403 Forbidden',
3519                 404 => '404 Not Found',
3520                 500 => '500 Internal Server Error',
3521                 503 => '503 Service Unavailable',
3522         );
3523         git_header_html($http_responses{$status});
3524         print <<EOF;
3525 <div class="page_body">
3526 <br /><br />
3527 $status - $error
3528 <br />
3529 EOF
3530         if (defined $extra) {
3531                 print "<hr />\n" .
3532                       "$extra\n";
3533         }
3534         print "</div>\n";
3535
3536         git_footer_html();
3537         goto DONE_GITWEB;
3538 }
3539
3540 ## ----------------------------------------------------------------------
3541 ## functions printing or outputting HTML: navigation
3542
3543 sub git_print_page_nav {
3544         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3545         $extra = '' if !defined $extra; # pager or formats
3546
3547         my @navs = qw(summary shortlog log commit commitdiff tree);
3548         if ($suppress) {
3549                 @navs = grep { $_ ne $suppress } @navs;
3550         }
3551
3552         my %arg = map { $_ => {action=>$_} } @navs;
3553         if (defined $head) {
3554                 for (qw(commit commitdiff)) {
3555                         $arg{$_}{'hash'} = $head;
3556                 }
3557                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3558                         for (qw(shortlog log)) {
3559                                 $arg{$_}{'hash'} = $head;
3560                         }
3561                 }
3562         }
3563
3564         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3565         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3566
3567         my @actions = gitweb_get_feature('actions');
3568         my %repl = (
3569                 '%' => '%',
3570                 'n' => $project,         # project name
3571                 'f' => $git_dir,         # project path within filesystem
3572                 'h' => $treehead || '',  # current hash ('h' parameter)
3573                 'b' => $treebase || '',  # hash base ('hb' parameter)
3574         );
3575         while (@actions) {
3576                 my ($label, $link, $pos) = splice(@actions,0,3);
3577                 # insert
3578                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3579                 # munch munch
3580                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3581                 $arg{$label}{'_href'} = $link;
3582         }
3583
3584         print "<div class=\"page_nav\">\n" .
3585                 (join " | ",
3586                  map { $_ eq $current ?
3587                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3588                  } @navs);
3589         print "<br/>\n$extra<br/>\n" .
3590               "</div>\n";
3591 }
3592
3593 sub format_paging_nav {
3594         my ($action, $page, $has_next_link) = @_;
3595         my $paging_nav;
3596
3597
3598         if ($page > 0) {
3599                 $paging_nav .=
3600                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3601                         " &sdot; " .
3602                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3603                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3604         } else {
3605                 $paging_nav .= "first &sdot; prev";
3606         }
3607
3608         if ($has_next_link) {
3609                 $paging_nav .= " &sdot; " .
3610                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3611                                  -accesskey => "n", -title => "Alt-n"}, "next");
3612         } else {
3613                 $paging_nav .= " &sdot; next";
3614         }
3615
3616         return $paging_nav;
3617 }
3618
3619 ## ......................................................................
3620 ## functions printing or outputting HTML: div
3621
3622 sub git_print_header_div {
3623         my ($action, $title, $hash, $hash_base) = @_;
3624         my %args = ();
3625
3626         $args{'action'} = $action;
3627         $args{'hash'} = $hash if $hash;
3628         $args{'hash_base'} = $hash_base if $hash_base;
3629
3630         print "<div class=\"header\">\n" .
3631               $cgi->a({-href => href(%args), -class => "title"},
3632               $title ? $title : $action) .
3633               "\n</div>\n";
3634 }
3635
3636 sub print_local_time {
3637         print format_local_time(@_);
3638 }
3639
3640 sub format_local_time {
3641         my $localtime = '';
3642         my %date = @_;
3643         if ($date{'hour_local'} < 6) {
3644                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3645                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3646         } else {
3647                 $localtime .= sprintf(" (%02d:%02d %s)",
3648                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3649         }
3650
3651         return $localtime;
3652 }
3653
3654 # Outputs the author name and date in long form
3655 sub git_print_authorship {
3656         my $co = shift;
3657         my %opts = @_;
3658         my $tag = $opts{-tag} || 'div';
3659         my $author = $co->{'author_name'};
3660
3661         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3662         print "<$tag class=\"author_date\">" .
3663               format_search_author($author, "author", esc_html($author)) .
3664               " [$ad{'rfc2822'}";
3665         print_local_time(%ad) if ($opts{-localtime});
3666         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3667                   . "</$tag>\n";
3668 }
3669
3670 # Outputs table rows containing the full author or committer information,
3671 # in the format expected for 'commit' view (& similia).
3672 # Parameters are a commit hash reference, followed by the list of people
3673 # to output information for. If the list is empty it defalts to both
3674 # author and committer.
3675 sub git_print_authorship_rows {
3676         my $co = shift;
3677         # too bad we can't use @people = @_ || ('author', 'committer')
3678         my @people = @_;
3679         @people = ('author', 'committer') unless @people;
3680         foreach my $who (@people) {
3681                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3682                 print "<tr><td>$who</td><td>" .
3683                       format_search_author($co->{"${who}_name"}, $who,
3684                                esc_html($co->{"${who}_name"})) . " " .
3685                       format_search_author($co->{"${who}_email"}, $who,
3686                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3687                       "</td><td rowspan=\"2\">" .
3688                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3689                       "</td></tr>\n" .
3690                       "<tr>" .
3691                       "<td></td><td> $wd{'rfc2822'}";
3692                 print_local_time(%wd);
3693                 print "</td>" .
3694                       "</tr>\n";
3695         }
3696 }
3697
3698 sub git_print_page_path {
3699         my $name = shift;
3700         my $type = shift;
3701         my $hb = shift;
3702
3703
3704         print "<div class=\"page_path\">";
3705         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3706                       -title => 'tree root'}, to_utf8("[$project]"));
3707         print " / ";
3708         if (defined $name) {
3709                 my @dirname = split '/', $name;
3710                 my $basename = pop @dirname;
3711                 my $fullname = '';
3712
3713                 foreach my $dir (@dirname) {
3714                         $fullname .= ($fullname ? '/' : '') . $dir;
3715                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3716                                                      hash_base=>$hb),
3717                                       -title => $fullname}, esc_path($dir));
3718                         print " / ";
3719                 }
3720                 if (defined $type && $type eq 'blob') {
3721                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3722                                                      hash_base=>$hb),
3723                                       -title => $name}, esc_path($basename));
3724                 } elsif (defined $type && $type eq 'tree') {
3725                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3726                                                      hash_base=>$hb),
3727                                       -title => $name}, esc_path($basename));
3728                         print " / ";
3729                 } else {
3730                         print esc_path($basename);
3731                 }
3732         }
3733         print "<br/></div>\n";
3734 }
3735
3736 sub git_print_log {
3737         my $log = shift;
3738         my %opts = @_;
3739
3740         if ($opts{'-remove_title'}) {
3741                 # remove title, i.e. first line of log
3742                 shift @$log;
3743         }
3744         # remove leading empty lines
3745         while (defined $log->[0] && $log->[0] eq "") {
3746                 shift @$log;
3747         }
3748
3749         # print log
3750         my $signoff = 0;
3751         my $empty = 0;
3752         foreach my $line (@$log) {
3753                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3754                         $signoff = 1;
3755                         $empty = 0;
3756                         if (! $opts{'-remove_signoff'}) {
3757                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3758                                 next;
3759                         } else {
3760                                 # remove signoff lines
3761                                 next;
3762                         }
3763                 } else {
3764                         $signoff = 0;
3765                 }
3766
3767                 # print only one empty line
3768                 # do not print empty line after signoff
3769                 if ($line eq "") {
3770                         next if ($empty || $signoff);
3771                         $empty = 1;
3772                 } else {
3773                         $empty = 0;
3774                 }
3775
3776                 print format_log_line_html($line) . "<br/>\n";
3777         }
3778
3779         if ($opts{'-final_empty_line'}) {
3780                 # end with single empty line
3781                 print "<br/>\n" unless $empty;
3782         }
3783 }
3784
3785 # return link target (what link points to)
3786 sub git_get_link_target {
3787         my $hash = shift;
3788         my $link_target;
3789
3790         # read link
3791         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3792                 or return;
3793         {
3794                 local $/ = undef;
3795                 $link_target = <$fd>;
3796         }
3797         close $fd
3798                 or return;
3799
3800         return $link_target;
3801 }
3802
3803 # given link target, and the directory (basedir) the link is in,
3804 # return target of link relative to top directory (top tree);
3805 # return undef if it is not possible (including absolute links).
3806 sub normalize_link_target {
3807         my ($link_target, $basedir) = @_;
3808
3809         # absolute symlinks (beginning with '/') cannot be normalized
3810         return if (substr($link_target, 0, 1) eq '/');
3811
3812         # normalize link target to path from top (root) tree (dir)
3813         my $path;
3814         if ($basedir) {
3815                 $path = $basedir . '/' . $link_target;
3816         } else {
3817                 # we are in top (root) tree (dir)
3818                 $path = $link_target;
3819         }
3820
3821         # remove //, /./, and /../
3822         my @path_parts;
3823         foreach my $part (split('/', $path)) {
3824                 # discard '.' and ''
3825                 next if (!$part || $part eq '.');
3826                 # handle '..'
3827                 if ($part eq '..') {
3828                         if (@path_parts) {
3829                                 pop @path_parts;
3830                         } else {
3831                                 # link leads outside repository (outside top dir)
3832                                 return;
3833                         }
3834                 } else {
3835                         push @path_parts, $part;
3836                 }
3837         }
3838         $path = join('/', @path_parts);
3839
3840         return $path;
3841 }
3842
3843 # print tree entry (row of git_tree), but without encompassing <tr> element
3844 sub git_print_tree_entry {
3845         my ($t, $basedir, $hash_base, $have_blame) = @_;
3846
3847         my %base_key = ();
3848         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3849
3850         # The format of a table row is: mode list link.  Where mode is
3851         # the mode of the entry, list is the name of the entry, an href,
3852         # and link is the action links of the entry.
3853
3854         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3855         if (exists $t->{'size'}) {
3856                 print "<td class=\"size\">$t->{'size'}</td>\n";
3857         }
3858         if ($t->{'type'} eq "blob") {
3859                 print "<td class=\"list\">" .
3860                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3861                                                file_name=>"$basedir$t->{'name'}", %base_key),
3862                                 -class => "list"}, esc_path($t->{'name'}));
3863                 if (S_ISLNK(oct $t->{'mode'})) {
3864                         my $link_target = git_get_link_target($t->{'hash'});
3865                         if ($link_target) {
3866                                 my $norm_target = normalize_link_target($link_target, $basedir);
3867                                 if (defined $norm_target) {
3868                                         print " -> " .
3869                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3870                                                                      file_name=>$norm_target),
3871                                                        -title => $norm_target}, esc_path($link_target));
3872                                 } else {
3873                                         print " -> " . esc_path($link_target);
3874                                 }
3875                         }
3876                 }
3877                 print "</td>\n";
3878                 print "<td class=\"link\">";
3879                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3880                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3881                               "blob");
3882                 if ($have_blame) {
3883                         print " | " .
3884                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3885                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3886                                       "blame");
3887                 }
3888                 if (defined $hash_base) {
3889                         print " | " .
3890                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3891                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3892                                       "history");
3893                 }
3894                 print " | " .
3895                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3896                                                file_name=>"$basedir$t->{'name'}")},
3897                                 "raw");
3898                 print "</td>\n";
3899
3900         } elsif ($t->{'type'} eq "tree") {
3901                 print "<td class=\"list\">";
3902                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3903                                              file_name=>"$basedir$t->{'name'}",
3904                                              %base_key)},
3905                               esc_path($t->{'name'}));
3906                 print "</td>\n";
3907                 print "<td class=\"link\">";
3908                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3909                                              file_name=>"$basedir$t->{'name'}",
3910                                              %base_key)},
3911                               "tree");
3912                 if (defined $hash_base) {
3913                         print " | " .
3914                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3915                                                      file_name=>"$basedir$t->{'name'}")},
3916                                       "history");
3917                 }
3918                 print "</td>\n";
3919         } else {
3920                 # unknown object: we can only present history for it
3921                 # (this includes 'commit' object, i.e. submodule support)
3922                 print "<td class=\"list\">" .
3923                       esc_path($t->{'name'}) .
3924                       "</td>\n";
3925                 print "<td class=\"link\">";
3926                 if (defined $hash_base) {
3927                         print $cgi->a({-href => href(action=>"history",
3928                                                      hash_base=>$hash_base,
3929                                                      file_name=>"$basedir$t->{'name'}")},
3930                                       "history");
3931                 }
3932                 print "</td>\n";
3933         }
3934 }
3935
3936 ## ......................................................................
3937 ## functions printing large fragments of HTML
3938
3939 # get pre-image filenames for merge (combined) diff
3940 sub fill_from_file_info {
3941         my ($diff, @parents) = @_;
3942
3943         $diff->{'from_file'} = [ ];
3944         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3945         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3946                 if ($diff->{'status'}[$i] eq 'R' ||
3947                     $diff->{'status'}[$i] eq 'C') {
3948                         $diff->{'from_file'}[$i] =
3949                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3950                 }
3951         }
3952
3953         return $diff;
3954 }
3955
3956 # is current raw difftree line of file deletion
3957 sub is_deleted {
3958         my $diffinfo = shift;
3959
3960         return $diffinfo->{'to_id'} eq ('0' x 40);
3961 }
3962
3963 # does patch correspond to [previous] difftree raw line
3964 # $diffinfo  - hashref of parsed raw diff format
3965 # $patchinfo - hashref of parsed patch diff format
3966 #              (the same keys as in $diffinfo)
3967 sub is_patch_split {
3968         my ($diffinfo, $patchinfo) = @_;
3969
3970         return defined $diffinfo && defined $patchinfo
3971                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3972 }
3973
3974
3975 sub git_difftree_body {
3976         my ($difftree, $hash, @parents) = @_;
3977         my ($parent) = $parents[0];
3978         my $have_blame = gitweb_check_feature('blame');
3979         print "<div class=\"list_head\">\n";
3980         if ($#{$difftree} > 10) {
3981                 print(($#{$difftree} + 1) . " files changed:\n");
3982         }
3983         print "</div>\n";
3984
3985         print "<table class=\"" .
3986               (@parents > 1 ? "combined " : "") .
3987               "diff_tree\">\n";
3988
3989         # header only for combined diff in 'commitdiff' view
3990         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3991         if ($has_header) {
3992                 # table header
3993                 print "<thead><tr>\n" .
3994                        "<th></th><th></th>\n"; # filename, patchN link
3995                 for (my $i = 0; $i < @parents; $i++) {
3996                         my $par = $parents[$i];
3997                         print "<th>" .
3998                               $cgi->a({-href => href(action=>"commitdiff",
3999                                                      hash=>$hash, hash_parent=>$par),
4000                                        -title => 'commitdiff to parent number ' .
4001                                                   ($i+1) . ': ' . substr($par,0,7)},
4002                                       $i+1) .
4003                               "&nbsp;</th>\n";
4004                 }
4005                 print "</tr></thead>\n<tbody>\n";
4006         }
4007
4008         my $alternate = 1;
4009         my $patchno = 0;
4010         foreach my $line (@{$difftree}) {
4011                 my $diff = parsed_difftree_line($line);
4012
4013                 if ($alternate) {
4014                         print "<tr class=\"dark\">\n";
4015                 } else {
4016                         print "<tr class=\"light\">\n";
4017                 }
4018                 $alternate ^= 1;
4019
4020                 if (exists $diff->{'nparents'}) { # combined diff
4021
4022                         fill_from_file_info($diff, @parents)
4023                                 unless exists $diff->{'from_file'};
4024
4025                         if (!is_deleted($diff)) {
4026                                 # file exists in the result (child) commit
4027                                 print "<td>" .
4028                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4029                                                              file_name=>$diff->{'to_file'},
4030                                                              hash_base=>$hash),
4031                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4032                                       "</td>\n";
4033                         } else {
4034                                 print "<td>" .
4035                                       esc_path($diff->{'to_file'}) .
4036                                       "</td>\n";
4037                         }
4038
4039                         if ($action eq 'commitdiff') {
4040                                 # link to patch
4041                                 $patchno++;
4042                                 print "<td class=\"link\">" .
4043                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4044                                       " | " .
4045                                       "</td>\n";
4046                         }
4047
4048                         my $has_history = 0;
4049                         my $not_deleted = 0;
4050                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4051                                 my $hash_parent = $parents[$i];
4052                                 my $from_hash = $diff->{'from_id'}[$i];
4053                                 my $from_path = $diff->{'from_file'}[$i];
4054                                 my $status = $diff->{'status'}[$i];
4055
4056                                 $has_history ||= ($status ne 'A');
4057                                 $not_deleted ||= ($status ne 'D');
4058
4059                                 if ($status eq 'A') {
4060                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4061                                 } elsif ($status eq 'D') {
4062                                         print "<td class=\"link\">" .
4063                                               $cgi->a({-href => href(action=>"blob",
4064                                                                      hash_base=>$hash,
4065                                                                      hash=>$from_hash,
4066                                                                      file_name=>$from_path)},
4067                                                       "blob" . ($i+1)) .
4068                                               " | </td>\n";
4069                                 } else {
4070                                         if ($diff->{'to_id'} eq $from_hash) {
4071                                                 print "<td class=\"link nochange\">";
4072                                         } else {
4073                                                 print "<td class=\"link\">";
4074                                         }
4075                                         print $cgi->a({-href => href(action=>"blobdiff",
4076                                                                      hash=>$diff->{'to_id'},
4077                                                                      hash_parent=>$from_hash,
4078                                                                      hash_base=>$hash,
4079                                                                      hash_parent_base=>$hash_parent,
4080                                                                      file_name=>$diff->{'to_file'},
4081                                                                      file_parent=>$from_path)},
4082                                                       "diff" . ($i+1)) .
4083                                               " | </td>\n";
4084                                 }
4085                         }
4086
4087                         print "<td class=\"link\">";
4088                         if ($not_deleted) {
4089                                 print $cgi->a({-href => href(action=>"blob",
4090                                                              hash=>$diff->{'to_id'},
4091                                                              file_name=>$diff->{'to_file'},
4092                                                              hash_base=>$hash)},
4093                                               "blob");
4094                                 print " | " if ($has_history);
4095                         }
4096                         if ($has_history) {
4097                                 print $cgi->a({-href => href(action=>"history",
4098                                                              file_name=>$diff->{'to_file'},
4099                                                              hash_base=>$hash)},
4100                                               "history");
4101                         }
4102                         print "</td>\n";
4103
4104                         print "</tr>\n";
4105                         next; # instead of 'else' clause, to avoid extra indent
4106                 }
4107                 # else ordinary diff
4108
4109                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4110                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4111                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4112                         $to_mode_oct = oct $diff->{'to_mode'};
4113                         if (S_ISREG($to_mode_oct)) { # only for regular file
4114                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4115                         }
4116                         $to_file_type = file_type($diff->{'to_mode'});
4117                 }
4118                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4119                         $from_mode_oct = oct $diff->{'from_mode'};
4120                         if (S_ISREG($to_mode_oct)) { # only for regular file
4121                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4122                         }
4123                         $from_file_type = file_type($diff->{'from_mode'});
4124                 }
4125
4126                 if ($diff->{'status'} eq "A") { # created
4127                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4128                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4129                         $mode_chng   .= "]</span>";
4130                         print "<td>";
4131                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4132                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4133                                       -class => "list"}, esc_path($diff->{'file'}));
4134                         print "</td>\n";
4135                         print "<td>$mode_chng</td>\n";
4136                         print "<td class=\"link\">";
4137                         if ($action eq 'commitdiff') {
4138                                 # link to patch
4139                                 $patchno++;
4140                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4141                                 print " | ";
4142                         }
4143                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4144                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4145                                       "blob");
4146                         print "</td>\n";
4147
4148                 } elsif ($diff->{'status'} eq "D") { # deleted
4149                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4150                         print "<td>";
4151                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4152                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4153                                        -class => "list"}, esc_path($diff->{'file'}));
4154                         print "</td>\n";
4155                         print "<td>$mode_chng</td>\n";
4156                         print "<td class=\"link\">";
4157                         if ($action eq 'commitdiff') {
4158                                 # link to patch
4159                                 $patchno++;
4160                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4161                                 print " | ";
4162                         }
4163                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4164                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4165                                       "blob") . " | ";
4166                         if ($have_blame) {
4167                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4168                                                              file_name=>$diff->{'file'})},
4169                                               "blame") . " | ";
4170                         }
4171                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4172                                                      file_name=>$diff->{'file'})},
4173                                       "history");
4174                         print "</td>\n";
4175
4176                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4177                         my $mode_chnge = "";
4178                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4179                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4180                                 if ($from_file_type ne $to_file_type) {
4181                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4182                                 }
4183                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4184                                         if ($from_mode_str && $to_mode_str) {
4185                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4186                                         } elsif ($to_mode_str) {
4187                                                 $mode_chnge .= " mode: $to_mode_str";
4188                                         }
4189                                 }
4190                                 $mode_chnge .= "]</span>\n";
4191                         }
4192                         print "<td>";
4193                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4194                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4195                                       -class => "list"}, esc_path($diff->{'file'}));
4196                         print "</td>\n";
4197                         print "<td>$mode_chnge</td>\n";
4198                         print "<td class=\"link\">";
4199                         if ($action eq 'commitdiff') {
4200                                 # link to patch
4201                                 $patchno++;
4202                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4203                                       " | ";
4204                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4205                                 # "commit" view and modified file (not onlu mode changed)
4206                                 print $cgi->a({-href => href(action=>"blobdiff",
4207                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4208                                                              hash_base=>$hash, hash_parent_base=>$parent,
4209                                                              file_name=>$diff->{'file'})},
4210                                               "diff") .
4211                                       " | ";
4212                         }
4213                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4214                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4215                                        "blob") . " | ";
4216                         if ($have_blame) {
4217                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4218                                                              file_name=>$diff->{'file'})},
4219                                               "blame") . " | ";
4220                         }
4221                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4222                                                      file_name=>$diff->{'file'})},
4223                                       "history");
4224                         print "</td>\n";
4225
4226                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4227                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4228                         my $nstatus = $status_name{$diff->{'status'}};
4229                         my $mode_chng = "";
4230                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4231                                 # mode also for directories, so we cannot use $to_mode_str
4232                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4233                         }
4234                         print "<td>" .
4235                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4236                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4237                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4238                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4239                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4240                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4241                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4242                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4243                               "<td class=\"link\">";
4244                         if ($action eq 'commitdiff') {
4245                                 # link to patch
4246                                 $patchno++;
4247                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4248                                       " | ";
4249                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4250                                 # "commit" view and modified file (not only pure rename or copy)
4251                                 print $cgi->a({-href => href(action=>"blobdiff",
4252                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4253                                                              hash_base=>$hash, hash_parent_base=>$parent,
4254                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4255                                               "diff") .
4256                                       " | ";
4257                         }
4258                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4259                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4260                                       "blob") . " | ";
4261                         if ($have_blame) {
4262                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4263                                                              file_name=>$diff->{'to_file'})},
4264                                               "blame") . " | ";
4265                         }
4266                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4267                                                     file_name=>$diff->{'to_file'})},
4268                                       "history");
4269                         print "</td>\n";
4270
4271                 } # we should not encounter Unmerged (U) or Unknown (X) status
4272                 print "</tr>\n";
4273         }
4274         print "</tbody>" if $has_header;
4275         print "</table>\n";
4276 }
4277
4278 sub git_patchset_body {
4279         my ($fd, $difftree, $hash, @hash_parents) = @_;
4280         my ($hash_parent) = $hash_parents[0];
4281
4282         my $is_combined = (@hash_parents > 1);
4283         my $patch_idx = 0;
4284         my $patch_number = 0;
4285         my $patch_line;
4286         my $diffinfo;
4287         my $to_name;
4288         my (%from, %to);
4289
4290         print "<div class=\"patchset\">\n";
4291
4292         # skip to first patch
4293         while ($patch_line = <$fd>) {
4294                 chomp $patch_line;
4295
4296                 last if ($patch_line =~ m/^diff /);
4297         }
4298
4299  PATCH:
4300         while ($patch_line) {
4301
4302                 # parse "git diff" header line
4303                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4304                         # $1 is from_name, which we do not use
4305                         $to_name = unquote($2);
4306                         $to_name =~ s!^b/!!;
4307                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4308                         # $1 is 'cc' or 'combined', which we do not use
4309                         $to_name = unquote($2);
4310                 } else {
4311                         $to_name = undef;
4312                 }
4313
4314                 # check if current patch belong to current raw line
4315                 # and parse raw git-diff line if needed
4316                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4317                         # this is continuation of a split patch
4318                         print "<div class=\"patch cont\">\n";
4319                 } else {
4320                         # advance raw git-diff output if needed
4321                         $patch_idx++ if defined $diffinfo;
4322
4323                         # read and prepare patch information
4324                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4325
4326                         # compact combined diff output can have some patches skipped
4327                         # find which patch (using pathname of result) we are at now;
4328                         if ($is_combined) {
4329                                 while ($to_name ne $diffinfo->{'to_file'}) {
4330                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4331                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4332                                               "</div>\n";  # class="patch"
4333
4334                                         $patch_idx++;
4335                                         $patch_number++;
4336
4337                                         last if $patch_idx > $#$difftree;
4338                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4339                                 }
4340                         }
4341
4342                         # modifies %from, %to hashes
4343                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4344
4345                         # this is first patch for raw difftree line with $patch_idx index
4346                         # we index @$difftree array from 0, but number patches from 1
4347                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4348                 }
4349
4350                 # git diff header
4351                 #assert($patch_line =~ m/^diff /) if DEBUG;
4352                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4353                 $patch_number++;
4354                 # print "git diff" header
4355                 print format_git_diff_header_line($patch_line, $diffinfo,
4356                                                   \%from, \%to);
4357
4358                 # print extended diff header
4359                 print "<div class=\"diff extended_header\">\n";
4360         EXTENDED_HEADER:
4361                 while ($patch_line = <$fd>) {
4362                         chomp $patch_line;
4363
4364                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4365
4366                         print format_extended_diff_header_line($patch_line, $diffinfo,
4367                                                                \%from, \%to);
4368                 }
4369                 print "</div>\n"; # class="diff extended_header"
4370
4371                 # from-file/to-file diff header
4372                 if (! $patch_line) {
4373                         print "</div>\n"; # class="patch"
4374                         last PATCH;
4375                 }
4376                 next PATCH if ($patch_line =~ m/^diff /);
4377                 #assert($patch_line =~ m/^---/) if DEBUG;
4378
4379                 my $last_patch_line = $patch_line;
4380                 $patch_line = <$fd>;
4381                 chomp $patch_line;
4382                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4383
4384                 print format_diff_from_to_header($last_patch_line, $patch_line,
4385                                                  $diffinfo, \%from, \%to,
4386                                                  @hash_parents);
4387
4388                 # the patch itself
4389         LINE:
4390                 while ($patch_line = <$fd>) {
4391                         chomp $patch_line;
4392
4393                         next PATCH if ($patch_line =~ m/^diff /);
4394
4395                         print format_diff_line($patch_line, \%from, \%to);
4396                 }
4397
4398         } continue {
4399                 print "</div>\n"; # class="patch"
4400         }
4401
4402         # for compact combined (--cc) format, with chunk and patch simpliciaction
4403         # patchset might be empty, but there might be unprocessed raw lines
4404         for (++$patch_idx if $patch_number > 0;
4405              $patch_idx < @$difftree;
4406              ++$patch_idx) {
4407                 # read and prepare patch information
4408                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4409
4410                 # generate anchor for "patch" links in difftree / whatchanged part
4411                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4412                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4413                       "</div>\n";  # class="patch"
4414
4415                 $patch_number++;
4416         }
4417
4418         if ($patch_number == 0) {
4419                 if (@hash_parents > 1) {
4420                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4421                 } else {
4422                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4423                 }
4424         }
4425
4426         print "</div>\n"; # class="patchset"
4427 }
4428
4429 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4430
4431 # fills project list info (age, description, owner, forks) for each
4432 # project in the list, removing invalid projects from returned list
4433 # NOTE: modifies $projlist, but does not remove entries from it
4434 sub fill_project_list_info {
4435         my ($projlist, $check_forks) = @_;
4436         my @projects;
4437
4438         my $show_ctags = gitweb_check_feature('ctags');
4439  PROJECT:
4440         foreach my $pr (@$projlist) {
4441                 my (@activity) = git_get_last_activity($pr->{'path'});
4442                 unless (@activity) {
4443                         next PROJECT;
4444                 }
4445                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4446                 if (!defined $pr->{'descr'}) {
4447                         my $descr = git_get_project_description($pr->{'path'}) || "";
4448                         $descr = to_utf8($descr);
4449                         $pr->{'descr_long'} = $descr;
4450                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4451                 }
4452                 if (!defined $pr->{'owner'}) {
4453                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4454                 }
4455                 if ($check_forks) {
4456                         my $pname = $pr->{'path'};
4457                         if (($pname =~ s/\.git$//) &&
4458                             ($pname !~ /\/$/) &&
4459                             (-d "$projectroot/$pname")) {
4460                                 $pr->{'forks'} = "-d $projectroot/$pname";
4461                         } else {
4462                                 $pr->{'forks'} = 0;
4463                         }
4464                 }
4465                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4466                 push @projects, $pr;
4467         }
4468
4469         return @projects;
4470 }
4471
4472 # print 'sort by' <th> element, generating 'sort by $name' replay link
4473 # if that order is not selected
4474 sub print_sort_th {
4475         print format_sort_th(@_);
4476 }
4477
4478 sub format_sort_th {
4479         my ($name, $order, $header) = @_;
4480         my $sort_th = "";
4481         $header ||= ucfirst($name);
4482
4483         if ($order eq $name) {
4484                 $sort_th .= "<th>$header</th>\n";
4485         } else {
4486                 $sort_th .= "<th>" .
4487                             $cgi->a({-href => href(-replay=>1, order=>$name),
4488                                      -class => "header"}, $header) .
4489                             "</th>\n";
4490         }
4491
4492         return $sort_th;
4493 }
4494
4495 sub git_project_list_body {
4496         # actually uses global variable $project
4497         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4498
4499         my $check_forks = gitweb_check_feature('forks');
4500         my @projects = fill_project_list_info($projlist, $check_forks);
4501
4502         $order ||= $default_projects_order;
4503         $from = 0 unless defined $from;
4504         $to = $#projects if (!defined $to || $#projects < $to);
4505
4506         my %order_info = (
4507                 project => { key => 'path', type => 'str' },
4508                 descr => { key => 'descr_long', type => 'str' },
4509                 owner => { key => 'owner', type => 'str' },
4510                 age => { key => 'age', type => 'num' }
4511         );
4512         my $oi = $order_info{$order};
4513         if ($oi->{'type'} eq 'str') {
4514                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4515         } else {
4516                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4517         }
4518
4519         my $show_ctags = gitweb_check_feature('ctags');
4520         if ($show_ctags) {
4521                 my %ctags;
4522                 foreach my $p (@projects) {
4523                         foreach my $ct (keys %{$p->{'ctags'}}) {
4524                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4525                         }
4526                 }
4527                 my $cloud = git_populate_project_tagcloud(\%ctags);
4528                 print git_show_project_tagcloud($cloud, 64);
4529         }
4530
4531         print "<table class=\"project_list\">\n";
4532         unless ($no_header) {
4533                 print "<tr>\n";
4534                 if ($check_forks) {
4535                         print "<th></th>\n";
4536                 }
4537                 print_sort_th('project', $order, 'Project');
4538                 print_sort_th('descr', $order, 'Description');
4539                 print_sort_th('owner', $order, 'Owner');
4540                 print_sort_th('age', $order, 'Last Change');
4541                 print "<th></th>\n" . # for links
4542                       "</tr>\n";
4543         }
4544         my $alternate = 1;
4545         my $tagfilter = $cgi->param('by_tag');
4546         for (my $i = $from; $i <= $to; $i++) {
4547                 my $pr = $projects[$i];
4548
4549                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4550                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4551                         and not $pr->{'descr_long'} =~ /$searchtext/;
4552                 # Weed out forks or non-matching entries of search
4553                 if ($check_forks) {
4554                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4555                         $forkbase="^$forkbase" if $forkbase;
4556                         next if not $searchtext and not $tagfilter and $show_ctags
4557                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4558                 }
4559
4560                 if ($alternate) {
4561                         print "<tr class=\"dark\">\n";
4562                 } else {
4563                         print "<tr class=\"light\">\n";
4564                 }
4565                 $alternate ^= 1;
4566                 if ($check_forks) {
4567                         print "<td>";
4568                         if ($pr->{'forks'}) {
4569                                 print "<!-- $pr->{'forks'} -->\n";
4570                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4571                         }
4572                         print "</td>\n";
4573                 }
4574                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4575                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4576                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4577                                         -class => "list", -title => $pr->{'descr_long'}},
4578                                         esc_html($pr->{'descr'})) . "</td>\n" .
4579                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4580                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4581                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4582                       "<td class=\"link\">" .
4583                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4584                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4585                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4586                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4587                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4588                       "</td>\n" .
4589                       "</tr>\n";
4590         }
4591         if (defined $extra) {
4592                 print "<tr>\n";
4593                 if ($check_forks) {
4594                         print "<td></td>\n";
4595                 }
4596                 print "<td colspan=\"5\">$extra</td>\n" .
4597                       "</tr>\n";
4598         }
4599         print "</table>\n";
4600 }
4601
4602 sub git_log_body {
4603         # uses global variable $project
4604         my ($commitlist, $from, $to, $refs, $extra) = @_;
4605
4606         $from = 0 unless defined $from;
4607         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4608
4609         for (my $i = 0; $i <= $to; $i++) {
4610                 my %co = %{$commitlist->[$i]};
4611                 next if !%co;
4612                 my $commit = $co{'id'};
4613                 my $ref = format_ref_marker($refs, $commit);
4614                 my %ad = parse_date($co{'author_epoch'});
4615                 git_print_header_div('commit',
4616                                "<span class=\"age\">$co{'age_string'}</span>" .
4617                                esc_html($co{'title'}) . $ref,
4618                                $commit);
4619                 print "<div class=\"title_text\">\n" .
4620                       "<div class=\"log_link\">\n" .
4621                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4622                       " | " .
4623                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4624                       " | " .
4625                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4626                       "<br/>\n" .
4627                       "</div>\n";
4628                       git_print_authorship(\%co, -tag => 'span');
4629                       print "<br/>\n</div>\n";
4630
4631                 print "<div class=\"log_body\">\n";
4632                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4633                 print "</div>\n";
4634         }
4635         if ($extra) {
4636                 print "<div class=\"page_nav\">\n";
4637                 print "$extra\n";
4638                 print "</div>\n";
4639         }
4640 }
4641
4642 sub git_shortlog_body {
4643         # uses global variable $project
4644         my ($commitlist, $from, $to, $refs, $extra) = @_;
4645
4646         $from = 0 unless defined $from;
4647         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4648
4649         print "<table class=\"shortlog\">\n";
4650         my $alternate = 1;
4651         for (my $i = $from; $i <= $to; $i++) {
4652                 my %co = %{$commitlist->[$i]};
4653                 my $commit = $co{'id'};
4654                 my $ref = format_ref_marker($refs, $commit);
4655                 if ($alternate) {
4656                         print "<tr class=\"dark\">\n";
4657                 } else {
4658                         print "<tr class=\"light\">\n";
4659                 }
4660                 $alternate ^= 1;
4661                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4662                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4663                       format_author_html('td', \%co, 10) . "<td>";
4664                 print format_subject_html($co{'title'}, $co{'title_short'},
4665                                           href(action=>"commit", hash=>$commit), $ref);
4666                 print "</td>\n" .
4667                       "<td class=\"link\">" .
4668                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4669                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4670                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4671                 my $snapshot_links = format_snapshot_links($commit);
4672                 if (defined $snapshot_links) {
4673                         print " | " . $snapshot_links;
4674                 }
4675                 print "</td>\n" .
4676                       "</tr>\n";
4677         }
4678         if (defined $extra) {
4679                 print "<tr>\n" .
4680                       "<td colspan=\"4\">$extra</td>\n" .
4681                       "</tr>\n";
4682         }
4683         print "</table>\n";
4684 }
4685
4686 sub git_history_body {
4687         # Warning: assumes constant type (blob or tree) during history
4688         my ($commitlist, $from, $to, $refs, $extra,
4689             $file_name, $file_hash, $ftype) = @_;
4690
4691         $from = 0 unless defined $from;
4692         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4693
4694         print "<table class=\"history\">\n";
4695         my $alternate = 1;
4696         for (my $i = $from; $i <= $to; $i++) {
4697                 my %co = %{$commitlist->[$i]};
4698                 if (!%co) {
4699                         next;
4700                 }
4701                 my $commit = $co{'id'};
4702
4703                 my $ref = format_ref_marker($refs, $commit);
4704
4705                 if ($alternate) {
4706                         print "<tr class=\"dark\">\n";
4707                 } else {
4708                         print "<tr class=\"light\">\n";
4709                 }
4710                 $alternate ^= 1;
4711                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4712         # shortlog:   format_author_html('td', \%co, 10)
4713                       format_author_html('td', \%co, 15, 3) . "<td>";
4714                 # originally git_history used chop_str($co{'title'}, 50)
4715                 print format_subject_html($co{'title'}, $co{'title_short'},
4716                                           href(action=>"commit", hash=>$commit), $ref);
4717                 print "</td>\n" .
4718                       "<td class=\"link\">" .
4719                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4720                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4721
4722                 if ($ftype eq 'blob') {
4723                         my $blob_current = $file_hash;
4724                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4725                         if (defined $blob_current && defined $blob_parent &&
4726                                         $blob_current ne $blob_parent) {
4727                                 print " | " .
4728                                         $cgi->a({-href => href(action=>"blobdiff",
4729                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4730                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4731                                                                file_name=>$file_name)},
4732                                                 "diff to current");
4733                         }
4734                 }
4735                 print "</td>\n" .
4736                       "</tr>\n";
4737         }
4738         if (defined $extra) {
4739                 print "<tr>\n" .
4740                       "<td colspan=\"4\">$extra</td>\n" .
4741                       "</tr>\n";
4742         }
4743         print "</table>\n";
4744 }
4745
4746 sub git_tags_body {
4747         # uses global variable $project
4748         my ($taglist, $from, $to, $extra) = @_;
4749         $from = 0 unless defined $from;
4750         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4751
4752         print "<table class=\"tags\">\n";
4753         my $alternate = 1;
4754         for (my $i = $from; $i <= $to; $i++) {
4755                 my $entry = $taglist->[$i];
4756                 my %tag = %$entry;
4757                 my $comment = $tag{'subject'};
4758                 my $comment_short;
4759                 if (defined $comment) {
4760                         $comment_short = chop_str($comment, 30, 5);
4761                 }
4762                 if ($alternate) {
4763                         print "<tr class=\"dark\">\n";
4764                 } else {
4765                         print "<tr class=\"light\">\n";
4766                 }
4767                 $alternate ^= 1;
4768                 if (defined $tag{'age'}) {
4769                         print "<td><i>$tag{'age'}</i></td>\n";
4770                 } else {
4771                         print "<td></td>\n";
4772                 }
4773                 print "<td>" .
4774                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4775                                -class => "list name"}, esc_html($tag{'name'})) .
4776                       "</td>\n" .
4777                       "<td>";
4778                 if (defined $comment) {
4779                         print format_subject_html($comment, $comment_short,
4780                                                   href(action=>"tag", hash=>$tag{'id'}));
4781                 }
4782                 print "</td>\n" .
4783                       "<td class=\"selflink\">";
4784                 if ($tag{'type'} eq "tag") {
4785                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4786                 } else {
4787                         print "&nbsp;";
4788                 }
4789                 print "</td>\n" .
4790                       "<td class=\"link\">" . " | " .
4791                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4792                 if ($tag{'reftype'} eq "commit") {
4793                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4794                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4795                 } elsif ($tag{'reftype'} eq "blob") {
4796                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4797                 }
4798                 print "</td>\n" .
4799                       "</tr>";
4800         }
4801         if (defined $extra) {
4802                 print "<tr>\n" .
4803                       "<td colspan=\"5\">$extra</td>\n" .
4804                       "</tr>\n";
4805         }
4806         print "</table>\n";
4807 }
4808
4809 sub git_heads_body {
4810         # uses global variable $project
4811         my ($headlist, $head, $from, $to, $extra) = @_;
4812         $from = 0 unless defined $from;
4813         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4814
4815         print "<table class=\"heads\">\n";
4816         my $alternate = 1;
4817         for (my $i = $from; $i <= $to; $i++) {
4818                 my $entry = $headlist->[$i];
4819                 my %ref = %$entry;
4820                 my $curr = $ref{'id'} eq $head;
4821                 if ($alternate) {
4822                         print "<tr class=\"dark\">\n";
4823                 } else {
4824                         print "<tr class=\"light\">\n";
4825                 }
4826                 $alternate ^= 1;
4827                 print "<td><i>$ref{'age'}</i></td>\n" .
4828                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4829                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4830                                -class => "list name"},esc_html($ref{'name'})) .
4831                       "</td>\n" .
4832                       "<td class=\"link\">" .
4833                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4834                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4835                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4836                       "</td>\n" .
4837                       "</tr>";
4838         }
4839         if (defined $extra) {
4840                 print "<tr>\n" .
4841                       "<td colspan=\"3\">$extra</td>\n" .
4842                       "</tr>\n";
4843         }
4844         print "</table>\n";
4845 }
4846
4847 sub git_search_grep_body {
4848         my ($commitlist, $from, $to, $extra) = @_;
4849         $from = 0 unless defined $from;
4850         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4851
4852         print "<table class=\"commit_search\">\n";
4853         my $alternate = 1;
4854         for (my $i = $from; $i <= $to; $i++) {
4855                 my %co = %{$commitlist->[$i]};
4856                 if (!%co) {
4857                         next;
4858                 }
4859                 my $commit = $co{'id'};
4860                 if ($alternate) {
4861                         print "<tr class=\"dark\">\n";
4862                 } else {
4863                         print "<tr class=\"light\">\n";
4864                 }
4865                 $alternate ^= 1;
4866                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4867                       format_author_html('td', \%co, 15, 5) .
4868                       "<td>" .
4869                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4870                                -class => "list subject"},
4871                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4872                 my $comment = $co{'comment'};
4873                 foreach my $line (@$comment) {
4874                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4875                                 my ($lead, $match, $trail) = ($1, $2, $3);
4876                                 $match = chop_str($match, 70, 5, 'center');
4877                                 my $contextlen = int((80 - length($match))/2);
4878                                 $contextlen = 30 if ($contextlen > 30);
4879                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4880                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4881
4882                                 $lead  = esc_html($lead);
4883                                 $match = esc_html($match);
4884                                 $trail = esc_html($trail);
4885
4886                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4887                         }
4888                 }
4889                 print "</td>\n" .
4890                       "<td class=\"link\">" .
4891                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4892                       " | " .
4893                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4894                       " | " .
4895                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4896                 print "</td>\n" .
4897                       "</tr>\n";
4898         }
4899         if (defined $extra) {
4900                 print "<tr>\n" .
4901                       "<td colspan=\"3\">$extra</td>\n" .
4902                       "</tr>\n";
4903         }
4904         print "</table>\n";
4905 }
4906
4907 ## ======================================================================
4908 ## ======================================================================
4909 ## actions
4910
4911 sub git_project_list {
4912         my $order = $input_params{'order'};
4913         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4914                 die_error(400, "Unknown order parameter");
4915         }
4916
4917         my @list = git_get_projects_list();
4918         if (!@list) {
4919                 die_error(404, "No projects found");
4920         }
4921
4922         git_header_html();
4923         if (defined $home_text && -f $home_text) {
4924                 print "<div class=\"index_include\">\n";
4925                 insert_file($home_text);
4926                 print "</div>\n";
4927         }
4928         print $cgi->startform(-method => "get") .
4929               "<p class=\"projsearch\">Search:\n" .
4930               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4931               "</p>" .
4932               $cgi->end_form() . "\n";
4933         git_project_list_body(\@list, $order);
4934         git_footer_html();
4935 }
4936
4937 sub git_forks {
4938         my $order = $input_params{'order'};
4939         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4940                 die_error(400, "Unknown order parameter");
4941         }
4942
4943         my @list = git_get_projects_list($project);
4944         if (!@list) {
4945                 die_error(404, "No forks found");
4946         }
4947
4948         git_header_html();
4949         git_print_page_nav('','');
4950         git_print_header_div('summary', "$project forks");
4951         git_project_list_body(\@list, $order);
4952         git_footer_html();
4953 }
4954
4955 sub git_project_index {
4956         my @projects = git_get_projects_list($project);
4957
4958         print $cgi->header(
4959                 -type => 'text/plain',
4960                 -charset => 'utf-8',
4961                 -content_disposition => 'inline; filename="index.aux"');
4962
4963         foreach my $pr (@projects) {
4964                 if (!exists $pr->{'owner'}) {
4965                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4966                 }
4967
4968                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4969                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4970                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4971                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4972                 $path  =~ s/ /\+/g;
4973                 $owner =~ s/ /\+/g;
4974
4975                 print "$path $owner\n";
4976         }
4977 }
4978
4979 sub git_summary {
4980         my $descr = git_get_project_description($project) || "none";
4981         my %co = parse_commit("HEAD");
4982         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4983         my $head = $co{'id'};
4984
4985         my $owner = git_get_project_owner($project);
4986
4987         my $refs = git_get_references();
4988         # These get_*_list functions return one more to allow us to see if
4989         # there are more ...
4990         my @taglist  = git_get_tags_list(16);
4991         my @headlist = git_get_heads_list(16);
4992         my @forklist;
4993         my $check_forks = gitweb_check_feature('forks');
4994
4995         if ($check_forks) {
4996                 @forklist = git_get_projects_list($project);
4997         }
4998
4999         git_header_html();
5000         git_print_page_nav('summary','', $head);
5001
5002         print "<div class=\"title\">&nbsp;</div>\n";
5003         print "<table class=\"projects_list\">\n" .
5004               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5005               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5006         if (defined $cd{'rfc2822'}) {
5007                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5008         }
5009
5010         # use per project git URL list in $projectroot/$project/cloneurl
5011         # or make project git URL from git base URL and project name
5012         my $url_tag = "URL";
5013         my @url_list = git_get_project_url_list($project);
5014         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5015         foreach my $git_url (@url_list) {
5016                 next unless $git_url;
5017                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5018                 $url_tag = "";
5019         }
5020
5021         # Tag cloud
5022         my $show_ctags = gitweb_check_feature('ctags');
5023         if ($show_ctags) {
5024                 my $ctags = git_get_project_ctags($project);
5025                 my $cloud = git_populate_project_tagcloud($ctags);
5026                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5027                 print "</td>\n<td>" unless %$ctags;
5028                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5029                 print "</td>\n<td>" if %$ctags;
5030                 print git_show_project_tagcloud($cloud, 48);
5031                 print "</td></tr>";
5032         }
5033
5034         print "</table>\n";
5035
5036         # If XSS prevention is on, we don't include README.html.
5037         # TODO: Allow a readme in some safe format.
5038         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5039                 print "<div class=\"title\">readme</div>\n" .
5040                       "<div class=\"readme\">\n";
5041                 insert_file("$projectroot/$project/README.html");
5042                 print "\n</div>\n"; # class="readme"
5043         }
5044
5045         # we need to request one more than 16 (0..15) to check if
5046         # those 16 are all
5047         my @commitlist = $head ? parse_commits($head, 17) : ();
5048         if (@commitlist) {
5049                 git_print_header_div('shortlog');
5050                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5051                                   $#commitlist <=  15 ? undef :
5052                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5053         }
5054
5055         if (@taglist) {
5056                 git_print_header_div('tags');
5057                 git_tags_body(\@taglist, 0, 15,
5058                               $#taglist <=  15 ? undef :
5059                               $cgi->a({-href => href(action=>"tags")}, "..."));
5060         }
5061
5062         if (@headlist) {
5063                 git_print_header_div('heads');
5064                 git_heads_body(\@headlist, $head, 0, 15,
5065                                $#headlist <= 15 ? undef :
5066                                $cgi->a({-href => href(action=>"heads")}, "..."));
5067         }
5068
5069         if (@forklist) {
5070                 git_print_header_div('forks');
5071                 git_project_list_body(\@forklist, 'age', 0, 15,
5072                                       $#forklist <= 15 ? undef :
5073                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5074                                       'no_header');
5075         }
5076
5077         git_footer_html();
5078 }
5079
5080 sub git_tag {
5081         my $head = git_get_head_hash($project);
5082         git_header_html();
5083         git_print_page_nav('','', $head,undef,$head);
5084         my %tag = parse_tag($hash);
5085
5086         if (! %tag) {
5087                 die_error(404, "Unknown tag object");
5088         }
5089
5090         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5091         print "<div class=\"title_text\">\n" .
5092               "<table class=\"object_header\">\n" .
5093               "<tr>\n" .
5094               "<td>object</td>\n" .
5095               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5096                                $tag{'object'}) . "</td>\n" .
5097               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5098                                               $tag{'type'}) . "</td>\n" .
5099               "</tr>\n";
5100         if (defined($tag{'author'})) {
5101                 git_print_authorship_rows(\%tag, 'author');
5102         }
5103         print "</table>\n\n" .
5104               "</div>\n";
5105         print "<div class=\"page_body\">";
5106         my $comment = $tag{'comment'};
5107         foreach my $line (@$comment) {
5108                 chomp $line;
5109                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5110         }
5111         print "</div>\n";
5112         git_footer_html();
5113 }
5114
5115 sub git_blame_common {
5116         my $format = shift || 'porcelain';
5117         if ($format eq 'porcelain' && $cgi->param('js')) {
5118                 $format = 'incremental';
5119                 $action = 'blame_incremental'; # for page title etc
5120         }
5121
5122         # permissions
5123         gitweb_check_feature('blame')
5124                 or die_error(403, "Blame view not allowed");
5125
5126         # error checking
5127         die_error(400, "No file name given") unless $file_name;
5128         $hash_base ||= git_get_head_hash($project);
5129         die_error(404, "Couldn't find base commit") unless $hash_base;
5130         my %co = parse_commit($hash_base)
5131                 or die_error(404, "Commit not found");
5132         my $ftype = "blob";
5133         if (!defined $hash) {
5134                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5135                         or die_error(404, "Error looking up file");
5136         } else {
5137                 $ftype = git_get_type($hash);
5138                 if ($ftype !~ "blob") {
5139                         die_error(400, "Object is not a blob");
5140                 }
5141         }
5142
5143         my $fd;
5144         if ($format eq 'incremental') {
5145                 # get file contents (as base)
5146                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5147                         or die_error(500, "Open git-cat-file failed");
5148         } elsif ($format eq 'data') {
5149                 # run git-blame --incremental
5150                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5151                         $hash_base, "--", $file_name
5152                         or die_error(500, "Open git-blame --incremental failed");
5153         } else {
5154                 # run git-blame --porcelain
5155                 open $fd, "-|", git_cmd(), "blame", '-p',
5156                         $hash_base, '--', $file_name
5157                         or die_error(500, "Open git-blame --porcelain failed");
5158         }
5159
5160         # incremental blame data returns early
5161         if ($format eq 'data') {
5162                 print $cgi->header(
5163                         -type=>"text/plain", -charset => "utf-8",
5164                         -status=> "200 OK");
5165                 local $| = 1; # output autoflush
5166                 print while <$fd>;
5167                 close $fd
5168                         or print "ERROR $!\n";
5169
5170                 print 'END';
5171                 if (defined $t0 && gitweb_check_feature('timed')) {
5172                         print ' '.
5173                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5174                               ' '.$number_of_git_cmds;
5175                 }
5176                 print "\n";
5177
5178                 return;
5179         }
5180
5181         # page header
5182         git_header_html();
5183         my $formats_nav =
5184                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5185                         "blob") .
5186                 " | ";
5187         if ($format eq 'incremental') {
5188                 $formats_nav .=
5189                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5190                                 "blame") . " (non-incremental)";
5191         } else {
5192                 $formats_nav .=
5193                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5194                                 "blame") . " (incremental)";
5195         }
5196         $formats_nav .=
5197                 " | " .
5198                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5199                         "history") .
5200                 " | " .
5201                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5202                         "HEAD");
5203         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5204         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5205         git_print_page_path($file_name, $ftype, $hash_base);
5206
5207         # page body
5208         if ($format eq 'incremental') {
5209                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5210                       "This page requires JavaScript to run.\n Use ".
5211                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5212                               'this page').
5213                       " instead.\n".
5214                       "</b></center></div>\n</noscript>\n";
5215
5216                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5217         }
5218
5219         print qq!<div class="page_body">\n!;
5220         print qq!<div id="progress_info">... / ...</div>\n!
5221                 if ($format eq 'incremental');
5222         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5223               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5224               qq!<thead>\n!.
5225               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5226               qq!</thead>\n!.
5227               qq!<tbody>\n!;
5228
5229         my @rev_color = qw(light dark);
5230         my $num_colors = scalar(@rev_color);
5231         my $current_color = 0;
5232
5233         if ($format eq 'incremental') {
5234                 my $color_class = $rev_color[$current_color];
5235
5236                 #contents of a file
5237                 my $linenr = 0;
5238         LINE:
5239                 while (my $line = <$fd>) {
5240                         chomp $line;
5241                         $linenr++;
5242
5243                         print qq!<tr id="l$linenr" class="$color_class">!.
5244                               qq!<td class="sha1"><a href=""> </a></td>!.
5245                               qq!<td class="linenr">!.
5246                               qq!<a class="linenr" href="">$linenr</a></td>!;
5247                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5248                         print qq!</tr>\n!;
5249                 }
5250
5251         } else { # porcelain, i.e. ordinary blame
5252                 my %metainfo = (); # saves information about commits
5253
5254                 # blame data
5255         LINE:
5256                 while (my $line = <$fd>) {
5257                         chomp $line;
5258                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5259                         # no <lines in group> for subsequent lines in group of lines
5260                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5261                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5262                         if (!exists $metainfo{$full_rev}) {
5263                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5264                         }
5265                         my $meta = $metainfo{$full_rev};
5266                         my $data;
5267                         while ($data = <$fd>) {
5268                                 chomp $data;
5269                                 last if ($data =~ s/^\t//); # contents of line
5270                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5271                                         $meta->{$1} = $2 unless exists $meta->{$1};
5272                                 }
5273                                 if ($data =~ /^previous /) {
5274                                         $meta->{'nprevious'}++;
5275                                 }
5276                         }
5277                         my $short_rev = substr($full_rev, 0, 8);
5278                         my $author = $meta->{'author'};
5279                         my %date =
5280                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5281                         my $date = $date{'iso-tz'};
5282                         if ($group_size) {
5283                                 $current_color = ($current_color + 1) % $num_colors;
5284                         }
5285                         my $tr_class = $rev_color[$current_color];
5286                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5287                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5288                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5289                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5290                         if ($group_size) {
5291                                 print "<td class=\"sha1\"";
5292                                 print " title=\"". esc_html($author) . ", $date\"";
5293                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5294                                 print ">";
5295                                 print $cgi->a({-href => href(action=>"commit",
5296                                                              hash=>$full_rev,
5297                                                              file_name=>$file_name)},
5298                                               esc_html($short_rev));
5299                                 if ($group_size >= 2) {
5300                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5301                                         if (@author_initials) {
5302                                                 print "<br />" .
5303                                                       esc_html(join('', @author_initials));
5304                                                 #           or join('.', ...)
5305                                         }
5306                                 }
5307                                 print "</td>\n";
5308                         }
5309                         # 'previous' <sha1 of parent commit> <filename at commit>
5310                         if (exists $meta->{'previous'} &&
5311                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5312                                 $meta->{'parent'} = $1;
5313                                 $meta->{'file_parent'} = unquote($2);
5314                         }
5315                         my $linenr_commit =
5316                                 exists($meta->{'parent'}) ?
5317                                 $meta->{'parent'} : $full_rev;
5318                         my $linenr_filename =
5319                                 exists($meta->{'file_parent'}) ?
5320                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5321                         my $blamed = href(action => 'blame',
5322                                           file_name => $linenr_filename,
5323                                           hash_base => $linenr_commit);
5324                         print "<td class=\"linenr\">";
5325                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5326                                         -class => "linenr" },
5327                                       esc_html($lineno));
5328                         print "</td>";
5329                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5330                         print "</tr>\n";
5331                 } # end while
5332
5333         }
5334
5335         # footer
5336         print "</tbody>\n".
5337               "</table>\n"; # class="blame"
5338         print "</div>\n";   # class="blame_body"
5339         close $fd
5340                 or print "Reading blob failed\n";
5341
5342         git_footer_html();
5343 }
5344
5345 sub git_blame {
5346         git_blame_common();
5347 }
5348
5349 sub git_blame_incremental {
5350         git_blame_common('incremental');
5351 }
5352
5353 sub git_blame_data {
5354         git_blame_common('data');
5355 }
5356
5357 sub git_tags {
5358         my $head = git_get_head_hash($project);
5359         git_header_html();
5360         git_print_page_nav('','', $head,undef,$head);
5361         git_print_header_div('summary', $project);
5362
5363         my @tagslist = git_get_tags_list();
5364         if (@tagslist) {
5365                 git_tags_body(\@tagslist);
5366         }
5367         git_footer_html();
5368 }
5369
5370 sub git_heads {
5371         my $head = git_get_head_hash($project);
5372         git_header_html();
5373         git_print_page_nav('','', $head,undef,$head);
5374         git_print_header_div('summary', $project);
5375
5376         my @headslist = git_get_heads_list();
5377         if (@headslist) {
5378                 git_heads_body(\@headslist, $head);
5379         }
5380         git_footer_html();
5381 }
5382
5383 sub git_blob_plain {
5384         my $type = shift;
5385         my $expires;
5386
5387         if (!defined $hash) {
5388                 if (defined $file_name) {
5389                         my $base = $hash_base || git_get_head_hash($project);
5390                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5391                                 or die_error(404, "Cannot find file");
5392                 } else {
5393                         die_error(400, "No file name defined");
5394                 }
5395         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5396                 # blobs defined by non-textual hash id's can be cached
5397                 $expires = "+1d";
5398         }
5399
5400         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5401                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5402
5403         # content-type (can include charset)
5404         $type = blob_contenttype($fd, $file_name, $type);
5405
5406         # "save as" filename, even when no $file_name is given
5407         my $save_as = "$hash";
5408         if (defined $file_name) {
5409                 $save_as = $file_name;
5410         } elsif ($type =~ m/^text\//) {
5411                 $save_as .= '.txt';
5412         }
5413
5414         # With XSS prevention on, blobs of all types except a few known safe
5415         # ones are served with "Content-Disposition: attachment" to make sure
5416         # they don't run in our security domain.  For certain image types,
5417         # blob view writes an <img> tag referring to blob_plain view, and we
5418         # want to be sure not to break that by serving the image as an
5419         # attachment (though Firefox 3 doesn't seem to care).
5420         my $sandbox = $prevent_xss &&
5421                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5422
5423         print $cgi->header(
5424                 -type => $type,
5425                 -expires => $expires,
5426                 -content_disposition =>
5427                         ($sandbox ? 'attachment' : 'inline')
5428                         . '; filename="' . $save_as . '"');
5429         local $/ = undef;
5430         binmode STDOUT, ':raw';
5431         print <$fd>;
5432         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5433         close $fd;
5434 }
5435
5436 sub git_blob {
5437         my $expires;
5438
5439         if (!defined $hash) {
5440                 if (defined $file_name) {
5441                         my $base = $hash_base || git_get_head_hash($project);
5442                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5443                                 or die_error(404, "Cannot find file");
5444                 } else {
5445                         die_error(400, "No file name defined");
5446                 }
5447         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5448                 # blobs defined by non-textual hash id's can be cached
5449                 $expires = "+1d";
5450         }
5451
5452         my $have_blame = gitweb_check_feature('blame');
5453         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5454                 or die_error(500, "Couldn't cat $file_name, $hash");
5455         my $mimetype = blob_mimetype($fd, $file_name);
5456         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5457                 close $fd;
5458                 return git_blob_plain($mimetype);
5459         }
5460         # we can have blame only for text/* mimetype
5461         $have_blame &&= ($mimetype =~ m!^text/!);
5462
5463         git_header_html(undef, $expires);
5464         my $formats_nav = '';
5465         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5466                 if (defined $file_name) {
5467                         if ($have_blame) {
5468                                 $formats_nav .=
5469                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5470                                                 "blame") .
5471                                         " | ";
5472                         }
5473                         $formats_nav .=
5474                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5475                                         "history") .
5476                                 " | " .
5477                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5478                                         "raw") .
5479                                 " | " .
5480                                 $cgi->a({-href => href(action=>"blob",
5481                                                        hash_base=>"HEAD", file_name=>$file_name)},
5482                                         "HEAD");
5483                 } else {
5484                         $formats_nav .=
5485                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5486                                         "raw");
5487                 }
5488                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5489                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5490         } else {
5491                 print "<div class=\"page_nav\">\n" .
5492                       "<br/><br/></div>\n" .
5493                       "<div class=\"title\">$hash</div>\n";
5494         }
5495         git_print_page_path($file_name, "blob", $hash_base);
5496         print "<div class=\"page_body\">\n";
5497         if ($mimetype =~ m!^image/!) {
5498                 print qq!<img type="$mimetype"!;
5499                 if ($file_name) {
5500                         print qq! alt="$file_name" title="$file_name"!;
5501                 }
5502                 print qq! src="! .
5503                       href(action=>"blob_plain", hash=>$hash,
5504                            hash_base=>$hash_base, file_name=>$file_name) .
5505                       qq!" />\n!;
5506         } else {
5507                 my $nr;
5508                 while (my $line = <$fd>) {
5509                         chomp $line;
5510                         $nr++;
5511                         $line = untabify($line);
5512                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5513                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5514                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5515                 }
5516         }
5517         close $fd
5518                 or print "Reading blob failed.\n";
5519         print "</div>";
5520         git_footer_html();
5521 }
5522
5523 sub git_tree {
5524         if (!defined $hash_base) {
5525                 $hash_base = "HEAD";
5526         }
5527         if (!defined $hash) {
5528                 if (defined $file_name) {
5529                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5530                 } else {
5531                         $hash = $hash_base;
5532                 }
5533         }
5534         die_error(404, "No such tree") unless defined($hash);
5535
5536         my $show_sizes = gitweb_check_feature('show-sizes');
5537         my $have_blame = gitweb_check_feature('blame');
5538
5539         my @entries = ();
5540         {
5541                 local $/ = "\0";
5542                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5543                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5544                         or die_error(500, "Open git-ls-tree failed");
5545                 @entries = map { chomp; $_ } <$fd>;
5546                 close $fd
5547                         or die_error(404, "Reading tree failed");
5548         }
5549
5550         my $refs = git_get_references();
5551         my $ref = format_ref_marker($refs, $hash_base);
5552         git_header_html();
5553         my $basedir = '';
5554         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5555                 my @views_nav = ();
5556                 if (defined $file_name) {
5557                         push @views_nav,
5558                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5559                                         "history"),
5560                                 $cgi->a({-href => href(action=>"tree",
5561                                                        hash_base=>"HEAD", file_name=>$file_name)},
5562                                         "HEAD"),
5563                 }
5564                 my $snapshot_links = format_snapshot_links($hash);
5565                 if (defined $snapshot_links) {
5566                         # FIXME: Should be available when we have no hash base as well.
5567                         push @views_nav, $snapshot_links;
5568                 }
5569                 git_print_page_nav('tree','', $hash_base, undef, undef,
5570                                    join(' | ', @views_nav));
5571                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5572         } else {
5573                 undef $hash_base;
5574                 print "<div class=\"page_nav\">\n";
5575                 print "<br/><br/></div>\n";
5576                 print "<div class=\"title\">$hash</div>\n";
5577         }
5578         if (defined $file_name) {
5579                 $basedir = $file_name;
5580                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5581                         $basedir .= '/';
5582                 }
5583                 git_print_page_path($file_name, 'tree', $hash_base);
5584         }
5585         print "<div class=\"page_body\">\n";
5586         print "<table class=\"tree\">\n";
5587         my $alternate = 1;
5588         # '..' (top directory) link if possible
5589         if (defined $hash_base &&
5590             defined $file_name && $file_name =~ m![^/]+$!) {
5591                 if ($alternate) {
5592                         print "<tr class=\"dark\">\n";
5593                 } else {
5594                         print "<tr class=\"light\">\n";
5595                 }
5596                 $alternate ^= 1;
5597
5598                 my $up = $file_name;
5599                 $up =~ s!/?[^/]+$!!;
5600                 undef $up unless $up;
5601                 # based on git_print_tree_entry
5602                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5603                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5604                 print '<td class="list">';
5605                 print $cgi->a({-href => href(action=>"tree",
5606                                              hash_base=>$hash_base,
5607                                              file_name=>$up)},
5608                               "..");
5609                 print "</td>\n";
5610                 print "<td class=\"link\"></td>\n";
5611
5612                 print "</tr>\n";
5613         }
5614         foreach my $line (@entries) {
5615                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5616
5617                 if ($alternate) {
5618                         print "<tr class=\"dark\">\n";
5619                 } else {
5620                         print "<tr class=\"light\">\n";
5621                 }
5622                 $alternate ^= 1;
5623
5624                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5625
5626                 print "</tr>\n";
5627         }
5628         print "</table>\n" .
5629               "</div>";
5630         git_footer_html();
5631 }
5632
5633 sub snapshot_name {
5634         my ($project, $hash) = @_;
5635
5636         # path/to/project.git  -> project
5637         # path/to/project/.git -> project
5638         my $name = to_utf8($project);
5639         $name =~ s,([^/])/*\.git$,$1,;
5640         $name = basename($name);
5641         # sanitize name
5642         $name =~ s/[[:cntrl:]]/?/g;
5643
5644         my $ver = $hash;
5645         if ($hash =~ /^[0-9a-fA-F]+$/) {
5646                 # shorten SHA-1 hash
5647                 my $full_hash = git_get_full_hash($project, $hash);
5648                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5649                         $ver = git_get_short_hash($project, $hash);
5650                 }
5651         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5652                 # tags don't need shortened SHA-1 hash
5653                 $ver = $1;
5654         } else {
5655                 # branches and other need shortened SHA-1 hash
5656                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5657                         $ver = $1;
5658                 }
5659                 $ver .= '-' . git_get_short_hash($project, $hash);
5660         }
5661         # in case of hierarchical branch names
5662         $ver =~ s!/!.!g;
5663
5664         # name = project-version_string
5665         $name = "$name-$ver";
5666
5667         return wantarray ? ($name, $name) : $name;
5668 }
5669
5670 sub git_snapshot {
5671         my $format = $input_params{'snapshot_format'};
5672         if (!@snapshot_fmts) {
5673                 die_error(403, "Snapshots not allowed");
5674         }
5675         # default to first supported snapshot format
5676         $format ||= $snapshot_fmts[0];
5677         if ($format !~ m/^[a-z0-9]+$/) {
5678                 die_error(400, "Invalid snapshot format parameter");
5679         } elsif (!exists($known_snapshot_formats{$format})) {
5680                 die_error(400, "Unknown snapshot format");
5681         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5682                 die_error(403, "Snapshot format not allowed");
5683         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5684                 die_error(403, "Unsupported snapshot format");
5685         }
5686
5687         my $type = git_get_type("$hash^{}");
5688         if (!$type) {
5689                 die_error(404, 'Object does not exist');
5690         }  elsif ($type eq 'blob') {
5691                 die_error(400, 'Object is not a tree-ish');
5692         }
5693
5694         my ($name, $prefix) = snapshot_name($project, $hash);
5695         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5696         my $cmd = quote_command(
5697                 git_cmd(), 'archive',
5698                 "--format=$known_snapshot_formats{$format}{'format'}",
5699                 "--prefix=$prefix/", $hash);
5700         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5701                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5702         }
5703
5704         $filename =~ s/(["\\])/\\$1/g;
5705         print $cgi->header(
5706                 -type => $known_snapshot_formats{$format}{'type'},
5707                 -content_disposition => 'inline; filename="' . $filename . '"',
5708                 -status => '200 OK');
5709
5710         open my $fd, "-|", $cmd
5711                 or die_error(500, "Execute git-archive failed");
5712         binmode STDOUT, ':raw';
5713         print <$fd>;
5714         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5715         close $fd;
5716 }
5717
5718 sub git_log_generic {
5719         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5720
5721         my $head = git_get_head_hash($project);
5722         if (!defined $base) {
5723                 $base = $head;
5724         }
5725         if (!defined $page) {
5726                 $page = 0;
5727         }
5728         my $refs = git_get_references();
5729
5730         my $commit_hash = $base;
5731         if (defined $parent) {
5732                 $commit_hash = "$parent..$base";
5733         }
5734         my @commitlist =
5735                 parse_commits($commit_hash, 101, (100 * $page),
5736                               defined $file_name ? ($file_name, "--full-history") : ());
5737
5738         my $ftype;
5739         if (!defined $file_hash && defined $file_name) {
5740                 # some commits could have deleted file in question,
5741                 # and not have it in tree, but one of them has to have it
5742                 for (my $i = 0; $i < @commitlist; $i++) {
5743                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5744                         last if defined $file_hash;
5745                 }
5746         }
5747         if (defined $file_hash) {
5748                 $ftype = git_get_type($file_hash);
5749         }
5750         if (defined $file_name && !defined $ftype) {
5751                 die_error(500, "Unknown type of object");
5752         }
5753         my %co;
5754         if (defined $file_name) {
5755                 %co = parse_commit($base)
5756                         or die_error(404, "Unknown commit object");
5757         }
5758
5759
5760         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5761         my $next_link = '';
5762         if ($#commitlist >= 100) {
5763                 $next_link =
5764                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5765                                  -accesskey => "n", -title => "Alt-n"}, "next");
5766         }
5767         my $patch_max = gitweb_get_feature('patches');
5768         if ($patch_max && !defined $file_name) {
5769                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5770                         $paging_nav .= " &sdot; " .
5771                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5772                                         "patches");
5773                 }
5774         }
5775
5776         git_header_html();
5777         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5778         if (defined $file_name) {
5779                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5780         } else {
5781                 git_print_header_div('summary', $project)
5782         }
5783         git_print_page_path($file_name, $ftype, $hash_base)
5784                 if (defined $file_name);
5785
5786         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5787                      $file_name, $file_hash, $ftype);
5788
5789         git_footer_html();
5790 }
5791
5792 sub git_log {
5793         git_log_generic('log', \&git_log_body,
5794                         $hash, $hash_parent);
5795 }
5796
5797 sub git_commit {
5798         $hash ||= $hash_base || "HEAD";
5799         my %co = parse_commit($hash)
5800             or die_error(404, "Unknown commit object");
5801
5802         my $parent  = $co{'parent'};
5803         my $parents = $co{'parents'}; # listref
5804
5805         # we need to prepare $formats_nav before any parameter munging
5806         my $formats_nav;
5807         if (!defined $parent) {
5808                 # --root commitdiff
5809                 $formats_nav .= '(initial)';
5810         } elsif (@$parents == 1) {
5811                 # single parent commit
5812                 $formats_nav .=
5813                         '(parent: ' .
5814                         $cgi->a({-href => href(action=>"commit",
5815                                                hash=>$parent)},
5816                                 esc_html(substr($parent, 0, 7))) .
5817                         ')';
5818         } else {
5819                 # merge commit
5820                 $formats_nav .=
5821                         '(merge: ' .
5822                         join(' ', map {
5823                                 $cgi->a({-href => href(action=>"commit",
5824                                                        hash=>$_)},
5825                                         esc_html(substr($_, 0, 7)));
5826                         } @$parents ) .
5827                         ')';
5828         }
5829         if (gitweb_check_feature('patches') && @$parents <= 1) {
5830                 $formats_nav .= " | " .
5831                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5832                                 "patch");
5833         }
5834
5835         if (!defined $parent) {
5836                 $parent = "--root";
5837         }
5838         my @difftree;
5839         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5840                 @diff_opts,
5841                 (@$parents <= 1 ? $parent : '-c'),
5842                 $hash, "--"
5843                 or die_error(500, "Open git-diff-tree failed");
5844         @difftree = map { chomp; $_ } <$fd>;
5845         close $fd or die_error(404, "Reading git-diff-tree failed");
5846
5847         # non-textual hash id's can be cached
5848         my $expires;
5849         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5850                 $expires = "+1d";
5851         }
5852         my $refs = git_get_references();
5853         my $ref = format_ref_marker($refs, $co{'id'});
5854
5855         git_header_html(undef, $expires);
5856         git_print_page_nav('commit', '',
5857                            $hash, $co{'tree'}, $hash,
5858                            $formats_nav);
5859
5860         if (defined $co{'parent'}) {
5861                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5862         } else {
5863                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5864         }
5865         print "<div class=\"title_text\">\n" .
5866               "<table class=\"object_header\">\n";
5867         git_print_authorship_rows(\%co);
5868         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5869         print "<tr>" .
5870               "<td>tree</td>" .
5871               "<td class=\"sha1\">" .
5872               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5873                        class => "list"}, $co{'tree'}) .
5874               "</td>" .
5875               "<td class=\"link\">" .
5876               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5877                       "tree");
5878         my $snapshot_links = format_snapshot_links($hash);
5879         if (defined $snapshot_links) {
5880                 print " | " . $snapshot_links;
5881         }
5882         print "</td>" .
5883               "</tr>\n";
5884
5885         foreach my $par (@$parents) {
5886                 print "<tr>" .
5887                       "<td>parent</td>" .
5888                       "<td class=\"sha1\">" .
5889                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5890                                class => "list"}, $par) .
5891                       "</td>" .
5892                       "<td class=\"link\">" .
5893                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5894                       " | " .
5895                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5896                       "</td>" .
5897                       "</tr>\n";
5898         }
5899         print "</table>".
5900               "</div>\n";
5901
5902         print "<div class=\"page_body\">\n";
5903         git_print_log($co{'comment'});
5904         print "</div>\n";
5905
5906         git_difftree_body(\@difftree, $hash, @$parents);
5907
5908         git_footer_html();
5909 }
5910
5911 sub git_object {
5912         # object is defined by:
5913         # - hash or hash_base alone
5914         # - hash_base and file_name
5915         my $type;
5916
5917         # - hash or hash_base alone
5918         if ($hash || ($hash_base && !defined $file_name)) {
5919                 my $object_id = $hash || $hash_base;
5920
5921                 open my $fd, "-|", quote_command(
5922                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5923                         or die_error(404, "Object does not exist");
5924                 $type = <$fd>;
5925                 chomp $type;
5926                 close $fd
5927                         or die_error(404, "Object does not exist");
5928
5929         # - hash_base and file_name
5930         } elsif ($hash_base && defined $file_name) {
5931                 $file_name =~ s,/+$,,;
5932
5933                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5934                         or die_error(404, "Base object does not exist");
5935
5936                 # here errors should not hapen
5937                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5938                         or die_error(500, "Open git-ls-tree failed");
5939                 my $line = <$fd>;
5940                 close $fd;
5941
5942                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5943                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5944                         die_error(404, "File or directory for given base does not exist");
5945                 }
5946                 $type = $2;
5947                 $hash = $3;
5948         } else {
5949                 die_error(400, "Not enough information to find object");
5950         }
5951
5952         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5953                                           hash=>$hash, hash_base=>$hash_base,
5954                                           file_name=>$file_name),
5955                              -status => '302 Found');
5956 }
5957
5958 sub git_blobdiff {
5959         my $format = shift || 'html';
5960
5961         my $fd;
5962         my @difftree;
5963         my %diffinfo;
5964         my $expires;
5965
5966         # preparing $fd and %diffinfo for git_patchset_body
5967         # new style URI
5968         if (defined $hash_base && defined $hash_parent_base) {
5969                 if (defined $file_name) {
5970                         # read raw output
5971                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5972                                 $hash_parent_base, $hash_base,
5973                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5974                                 or die_error(500, "Open git-diff-tree failed");
5975                         @difftree = map { chomp; $_ } <$fd>;
5976                         close $fd
5977                                 or die_error(404, "Reading git-diff-tree failed");
5978                         @difftree
5979                                 or die_error(404, "Blob diff not found");
5980
5981                 } elsif (defined $hash &&
5982                          $hash =~ /[0-9a-fA-F]{40}/) {
5983                         # try to find filename from $hash
5984
5985                         # read filtered raw output
5986                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5987                                 $hash_parent_base, $hash_base, "--"
5988                                 or die_error(500, "Open git-diff-tree failed");
5989                         @difftree =
5990                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5991                                 # $hash == to_id
5992                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5993                                 map { chomp; $_ } <$fd>;
5994                         close $fd
5995                                 or die_error(404, "Reading git-diff-tree failed");
5996                         @difftree
5997                                 or die_error(404, "Blob diff not found");
5998
5999                 } else {
6000                         die_error(400, "Missing one of the blob diff parameters");
6001                 }
6002
6003                 if (@difftree > 1) {
6004                         die_error(400, "Ambiguous blob diff specification");
6005                 }
6006
6007                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6008                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6009                 $file_name   ||= $diffinfo{'to_file'};
6010
6011                 $hash_parent ||= $diffinfo{'from_id'};
6012                 $hash        ||= $diffinfo{'to_id'};
6013
6014                 # non-textual hash id's can be cached
6015                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6016                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6017                         $expires = '+1d';
6018                 }
6019
6020                 # open patch output
6021                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6022                         '-p', ($format eq 'html' ? "--full-index" : ()),
6023                         $hash_parent_base, $hash_base,
6024                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6025                         or die_error(500, "Open git-diff-tree failed");
6026         }
6027
6028         # old/legacy style URI -- not generated anymore since 1.4.3.
6029         if (!%diffinfo) {
6030                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6031         }
6032
6033         # header
6034         if ($format eq 'html') {
6035                 my $formats_nav =
6036                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6037                                 "raw");
6038                 git_header_html(undef, $expires);
6039                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6040                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6041                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6042                 } else {
6043                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6044                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6045                 }
6046                 if (defined $file_name) {
6047                         git_print_page_path($file_name, "blob", $hash_base);
6048                 } else {
6049                         print "<div class=\"page_path\"></div>\n";
6050                 }
6051
6052         } elsif ($format eq 'plain') {
6053                 print $cgi->header(
6054                         -type => 'text/plain',
6055                         -charset => 'utf-8',
6056                         -expires => $expires,
6057                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6058
6059                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6060
6061         } else {
6062                 die_error(400, "Unknown blobdiff format");
6063         }
6064
6065         # patch
6066         if ($format eq 'html') {
6067                 print "<div class=\"page_body\">\n";
6068
6069                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6070                 close $fd;
6071
6072                 print "</div>\n"; # class="page_body"
6073                 git_footer_html();
6074
6075         } else {
6076                 while (my $line = <$fd>) {
6077                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6078                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6079
6080                         print $line;
6081
6082                         last if $line =~ m!^\+\+\+!;
6083                 }
6084                 local $/ = undef;
6085                 print <$fd>;
6086                 close $fd;
6087         }
6088 }
6089
6090 sub git_blobdiff_plain {
6091         git_blobdiff('plain');
6092 }
6093
6094 sub git_commitdiff {
6095         my %params = @_;
6096         my $format = $params{-format} || 'html';
6097
6098         my ($patch_max) = gitweb_get_feature('patches');
6099         if ($format eq 'patch') {
6100                 die_error(403, "Patch view not allowed") unless $patch_max;
6101         }
6102
6103         $hash ||= $hash_base || "HEAD";
6104         my %co = parse_commit($hash)
6105             or die_error(404, "Unknown commit object");
6106
6107         # choose format for commitdiff for merge
6108         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6109                 $hash_parent = '--cc';
6110         }
6111         # we need to prepare $formats_nav before almost any parameter munging
6112         my $formats_nav;
6113         if ($format eq 'html') {
6114                 $formats_nav =
6115                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6116                                 "raw");
6117                 if ($patch_max && @{$co{'parents'}} <= 1) {
6118                         $formats_nav .= " | " .
6119                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6120                                         "patch");
6121                 }
6122
6123                 if (defined $hash_parent &&
6124                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6125                         # commitdiff with two commits given
6126                         my $hash_parent_short = $hash_parent;
6127                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6128                                 $hash_parent_short = substr($hash_parent, 0, 7);
6129                         }
6130                         $formats_nav .=
6131                                 ' (from';
6132                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6133                                 if ($co{'parents'}[$i] eq $hash_parent) {
6134                                         $formats_nav .= ' parent ' . ($i+1);
6135                                         last;
6136                                 }
6137                         }
6138                         $formats_nav .= ': ' .
6139                                 $cgi->a({-href => href(action=>"commitdiff",
6140                                                        hash=>$hash_parent)},
6141                                         esc_html($hash_parent_short)) .
6142                                 ')';
6143                 } elsif (!$co{'parent'}) {
6144                         # --root commitdiff
6145                         $formats_nav .= ' (initial)';
6146                 } elsif (scalar @{$co{'parents'}} == 1) {
6147                         # single parent commit
6148                         $formats_nav .=
6149                                 ' (parent: ' .
6150                                 $cgi->a({-href => href(action=>"commitdiff",
6151                                                        hash=>$co{'parent'})},
6152                                         esc_html(substr($co{'parent'}, 0, 7))) .
6153                                 ')';
6154                 } else {
6155                         # merge commit
6156                         if ($hash_parent eq '--cc') {
6157                                 $formats_nav .= ' | ' .
6158                                         $cgi->a({-href => href(action=>"commitdiff",
6159                                                                hash=>$hash, hash_parent=>'-c')},
6160                                                 'combined');
6161                         } else { # $hash_parent eq '-c'
6162                                 $formats_nav .= ' | ' .
6163                                         $cgi->a({-href => href(action=>"commitdiff",
6164                                                                hash=>$hash, hash_parent=>'--cc')},
6165                                                 'compact');
6166                         }
6167                         $formats_nav .=
6168                                 ' (merge: ' .
6169                                 join(' ', map {
6170                                         $cgi->a({-href => href(action=>"commitdiff",
6171                                                                hash=>$_)},
6172                                                 esc_html(substr($_, 0, 7)));
6173                                 } @{$co{'parents'}} ) .
6174                                 ')';
6175                 }
6176         }
6177
6178         my $hash_parent_param = $hash_parent;
6179         if (!defined $hash_parent_param) {
6180                 # --cc for multiple parents, --root for parentless
6181                 $hash_parent_param =
6182                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6183         }
6184
6185         # read commitdiff
6186         my $fd;
6187         my @difftree;
6188         if ($format eq 'html') {
6189                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6190                         "--no-commit-id", "--patch-with-raw", "--full-index",
6191                         $hash_parent_param, $hash, "--"
6192                         or die_error(500, "Open git-diff-tree failed");
6193
6194                 while (my $line = <$fd>) {
6195                         chomp $line;
6196                         # empty line ends raw part of diff-tree output
6197                         last unless $line;
6198                         push @difftree, scalar parse_difftree_raw_line($line);
6199                 }
6200
6201         } elsif ($format eq 'plain') {
6202                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6203                         '-p', $hash_parent_param, $hash, "--"
6204                         or die_error(500, "Open git-diff-tree failed");
6205         } elsif ($format eq 'patch') {
6206                 # For commit ranges, we limit the output to the number of
6207                 # patches specified in the 'patches' feature.
6208                 # For single commits, we limit the output to a single patch,
6209                 # diverging from the git-format-patch default.
6210                 my @commit_spec = ();
6211                 if ($hash_parent) {
6212                         if ($patch_max > 0) {
6213                                 push @commit_spec, "-$patch_max";
6214                         }
6215                         push @commit_spec, '-n', "$hash_parent..$hash";
6216                 } else {
6217                         if ($params{-single}) {
6218                                 push @commit_spec, '-1';
6219                         } else {
6220                                 if ($patch_max > 0) {
6221                                         push @commit_spec, "-$patch_max";
6222                                 }
6223                                 push @commit_spec, "-n";
6224                         }
6225                         push @commit_spec, '--root', $hash;
6226                 }
6227                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6228                         '--stdout', @commit_spec
6229                         or die_error(500, "Open git-format-patch failed");
6230         } else {
6231                 die_error(400, "Unknown commitdiff format");
6232         }
6233
6234         # non-textual hash id's can be cached
6235         my $expires;
6236         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6237                 $expires = "+1d";
6238         }
6239
6240         # write commit message
6241         if ($format eq 'html') {
6242                 my $refs = git_get_references();
6243                 my $ref = format_ref_marker($refs, $co{'id'});
6244
6245                 git_header_html(undef, $expires);
6246                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6247                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6248                 print "<div class=\"title_text\">\n" .
6249                       "<table class=\"object_header\">\n";
6250                 git_print_authorship_rows(\%co);
6251                 print "</table>".
6252                       "</div>\n";
6253                 print "<div class=\"page_body\">\n";
6254                 if (@{$co{'comment'}} > 1) {
6255                         print "<div class=\"log\">\n";
6256                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6257                         print "</div>\n"; # class="log"
6258                 }
6259
6260         } elsif ($format eq 'plain') {
6261                 my $refs = git_get_references("tags");
6262                 my $tagname = git_get_rev_name_tags($hash);
6263                 my $filename = basename($project) . "-$hash.patch";
6264
6265                 print $cgi->header(
6266                         -type => 'text/plain',
6267                         -charset => 'utf-8',
6268                         -expires => $expires,
6269                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6270                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6271                 print "From: " . to_utf8($co{'author'}) . "\n";
6272                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6273                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6274
6275                 print "X-Git-Tag: $tagname\n" if $tagname;
6276                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6277
6278                 foreach my $line (@{$co{'comment'}}) {
6279                         print to_utf8($line) . "\n";
6280                 }
6281                 print "---\n\n";
6282         } elsif ($format eq 'patch') {
6283                 my $filename = basename($project) . "-$hash.patch";
6284
6285                 print $cgi->header(
6286                         -type => 'text/plain',
6287                         -charset => 'utf-8',
6288                         -expires => $expires,
6289                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6290         }
6291
6292         # write patch
6293         if ($format eq 'html') {
6294                 my $use_parents = !defined $hash_parent ||
6295                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6296                 git_difftree_body(\@difftree, $hash,
6297                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6298                 print "<br/>\n";
6299
6300                 git_patchset_body($fd, \@difftree, $hash,
6301                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6302                 close $fd;
6303                 print "</div>\n"; # class="page_body"
6304                 git_footer_html();
6305
6306         } elsif ($format eq 'plain') {
6307                 local $/ = undef;
6308                 print <$fd>;
6309                 close $fd
6310                         or print "Reading git-diff-tree failed\n";
6311         } elsif ($format eq 'patch') {
6312                 local $/ = undef;
6313                 print <$fd>;
6314                 close $fd
6315                         or print "Reading git-format-patch failed\n";
6316         }
6317 }
6318
6319 sub git_commitdiff_plain {
6320         git_commitdiff(-format => 'plain');
6321 }
6322
6323 # format-patch-style patches
6324 sub git_patch {
6325         git_commitdiff(-format => 'patch', -single => 1);
6326 }
6327
6328 sub git_patches {
6329         git_commitdiff(-format => 'patch');
6330 }
6331
6332 sub git_history {
6333         git_log_generic('history', \&git_history_body,
6334                         $hash_base, $hash_parent_base,
6335                         $file_name, $hash);
6336 }
6337
6338 sub git_search {
6339         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6340         if (!defined $searchtext) {
6341                 die_error(400, "Text field is empty");
6342         }
6343         if (!defined $hash) {
6344                 $hash = git_get_head_hash($project);
6345         }
6346         my %co = parse_commit($hash);
6347         if (!%co) {
6348                 die_error(404, "Unknown commit object");
6349         }
6350         if (!defined $page) {
6351                 $page = 0;
6352         }
6353
6354         $searchtype ||= 'commit';
6355         if ($searchtype eq 'pickaxe') {
6356                 # pickaxe may take all resources of your box and run for several minutes
6357                 # with every query - so decide by yourself how public you make this feature
6358                 gitweb_check_feature('pickaxe')
6359                     or die_error(403, "Pickaxe is disabled");
6360         }
6361         if ($searchtype eq 'grep') {
6362                 gitweb_check_feature('grep')
6363                     or die_error(403, "Grep is disabled");
6364         }
6365
6366         git_header_html();
6367
6368         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6369                 my $greptype;
6370                 if ($searchtype eq 'commit') {
6371                         $greptype = "--grep=";
6372                 } elsif ($searchtype eq 'author') {
6373                         $greptype = "--author=";
6374                 } elsif ($searchtype eq 'committer') {
6375                         $greptype = "--committer=";
6376                 }
6377                 $greptype .= $searchtext;
6378                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6379                                                $greptype, '--regexp-ignore-case',
6380                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6381
6382                 my $paging_nav = '';
6383                 if ($page > 0) {
6384                         $paging_nav .=
6385                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6386                                                        searchtext=>$searchtext,
6387                                                        searchtype=>$searchtype)},
6388                                         "first");
6389                         $paging_nav .= " &sdot; " .
6390                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6391                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6392                 } else {
6393                         $paging_nav .= "first";
6394                         $paging_nav .= " &sdot; prev";
6395                 }
6396                 my $next_link = '';
6397                 if ($#commitlist >= 100) {
6398                         $next_link =
6399                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6400                                          -accesskey => "n", -title => "Alt-n"}, "next");
6401                         $paging_nav .= " &sdot; $next_link";
6402                 } else {
6403                         $paging_nav .= " &sdot; next";
6404                 }
6405
6406                 if ($#commitlist >= 100) {
6407                 }
6408
6409                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6410                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6411                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6412         }
6413
6414         if ($searchtype eq 'pickaxe') {
6415                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6416                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6417
6418                 print "<table class=\"pickaxe search\">\n";
6419                 my $alternate = 1;
6420                 local $/ = "\n";
6421                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6422                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6423                         ($search_use_regexp ? '--pickaxe-regex' : ());
6424                 undef %co;
6425                 my @files;
6426                 while (my $line = <$fd>) {
6427                         chomp $line;
6428                         next unless $line;
6429
6430                         my %set = parse_difftree_raw_line($line);
6431                         if (defined $set{'commit'}) {
6432                                 # finish previous commit
6433                                 if (%co) {
6434                                         print "</td>\n" .
6435                                               "<td class=\"link\">" .
6436                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6437                                               " | " .
6438                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6439                                         print "</td>\n" .
6440                                               "</tr>\n";
6441                                 }
6442
6443                                 if ($alternate) {
6444                                         print "<tr class=\"dark\">\n";
6445                                 } else {
6446                                         print "<tr class=\"light\">\n";
6447                                 }
6448                                 $alternate ^= 1;
6449                                 %co = parse_commit($set{'commit'});
6450                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6451                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6452                                       "<td><i>$author</i></td>\n" .
6453                                       "<td>" .
6454                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6455                                               -class => "list subject"},
6456                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6457                         } elsif (defined $set{'to_id'}) {
6458                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6459
6460                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6461                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6462                                               -class => "list"},
6463                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6464                                       "<br/>\n";
6465                         }
6466                 }
6467                 close $fd;
6468
6469                 # finish last commit (warning: repetition!)
6470                 if (%co) {
6471                         print "</td>\n" .
6472                               "<td class=\"link\">" .
6473                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6474                               " | " .
6475                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6476                         print "</td>\n" .
6477                               "</tr>\n";
6478                 }
6479
6480                 print "</table>\n";
6481         }
6482
6483         if ($searchtype eq 'grep') {
6484                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6485                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6486
6487                 print "<table class=\"grep_search\">\n";
6488                 my $alternate = 1;
6489                 my $matches = 0;
6490                 local $/ = "\n";
6491                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6492                         $search_use_regexp ? ('-E', '-i') : '-F',
6493                         $searchtext, $co{'tree'};
6494                 my $lastfile = '';
6495                 while (my $line = <$fd>) {
6496                         chomp $line;
6497                         my ($file, $lno, $ltext, $binary);
6498                         last if ($matches++ > 1000);
6499                         if ($line =~ /^Binary file (.+) matches$/) {
6500                                 $file = $1;
6501                                 $binary = 1;
6502                         } else {
6503                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6504                         }
6505                         if ($file ne $lastfile) {
6506                                 $lastfile and print "</td></tr>\n";
6507                                 if ($alternate++) {
6508                                         print "<tr class=\"dark\">\n";
6509                                 } else {
6510                                         print "<tr class=\"light\">\n";
6511                                 }
6512                                 print "<td class=\"list\">".
6513                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6514                                                                file_name=>"$file"),
6515                                                 -class => "list"}, esc_path($file));
6516                                 print "</td><td>\n";
6517                                 $lastfile = $file;
6518                         }
6519                         if ($binary) {
6520                                 print "<div class=\"binary\">Binary file</div>\n";
6521                         } else {
6522                                 $ltext = untabify($ltext);
6523                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6524                                         $ltext = esc_html($1, -nbsp=>1);
6525                                         $ltext .= '<span class="match">';
6526                                         $ltext .= esc_html($2, -nbsp=>1);
6527                                         $ltext .= '</span>';
6528                                         $ltext .= esc_html($3, -nbsp=>1);
6529                                 } else {
6530                                         $ltext = esc_html($ltext, -nbsp=>1);
6531                                 }
6532                                 print "<div class=\"pre\">" .
6533                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6534                                                                file_name=>"$file").'#l'.$lno,
6535                                                 -class => "linenr"}, sprintf('%4i', $lno))
6536                                         . ' ' .  $ltext . "</div>\n";
6537                         }
6538                 }
6539                 if ($lastfile) {
6540                         print "</td></tr>\n";
6541                         if ($matches > 1000) {
6542                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6543                         }
6544                 } else {
6545                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6546                 }
6547                 close $fd;
6548
6549                 print "</table>\n";
6550         }
6551         git_footer_html();
6552 }
6553
6554 sub git_search_help {
6555         git_header_html();
6556         git_print_page_nav('','', $hash,$hash,$hash);
6557         print <<EOT;
6558 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6559 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6560 the pattern entered is recognized as the POSIX extended
6561 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6562 insensitive).</p>
6563 <dl>
6564 <dt><b>commit</b></dt>
6565 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6566 EOT
6567         my $have_grep = gitweb_check_feature('grep');
6568         if ($have_grep) {
6569                 print <<EOT;
6570 <dt><b>grep</b></dt>
6571 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6572     a different one) are searched for the given pattern. On large trees, this search can take
6573 a while and put some strain on the server, so please use it with some consideration. Note that
6574 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6575 case-sensitive.</dd>
6576 EOT
6577         }
6578         print <<EOT;
6579 <dt><b>author</b></dt>
6580 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6581 <dt><b>committer</b></dt>
6582 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6583 EOT
6584         my $have_pickaxe = gitweb_check_feature('pickaxe');
6585         if ($have_pickaxe) {
6586                 print <<EOT;
6587 <dt><b>pickaxe</b></dt>
6588 <dd>All commits that caused the string to appear or disappear from any file (changes that
6589 added, removed or "modified" the string) will be listed. This search can take a while and
6590 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6591 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6592 EOT
6593         }
6594         print "</dl>\n";
6595         git_footer_html();
6596 }
6597
6598 sub git_shortlog {
6599         git_log_generic('shortlog', \&git_shortlog_body,
6600                         $hash, $hash_parent);
6601 }
6602
6603 ## ......................................................................
6604 ## feeds (RSS, Atom; OPML)
6605
6606 sub git_feed {
6607         my $format = shift || 'atom';
6608         my $have_blame = gitweb_check_feature('blame');
6609
6610         # Atom: http://www.atomenabled.org/developers/syndication/
6611         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6612         if ($format ne 'rss' && $format ne 'atom') {
6613                 die_error(400, "Unknown web feed format");
6614         }
6615
6616         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6617         my $head = $hash || 'HEAD';
6618         my @commitlist = parse_commits($head, 150, 0, $file_name);
6619
6620         my %latest_commit;
6621         my %latest_date;
6622         my $content_type = "application/$format+xml";
6623         if (defined $cgi->http('HTTP_ACCEPT') &&
6624                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6625                 # browser (feed reader) prefers text/xml
6626                 $content_type = 'text/xml';
6627         }
6628         if (defined($commitlist[0])) {
6629                 %latest_commit = %{$commitlist[0]};
6630                 my $latest_epoch = $latest_commit{'committer_epoch'};
6631                 %latest_date   = parse_date($latest_epoch);
6632                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6633                 if (defined $if_modified) {
6634                         my $since;
6635                         if (eval { require HTTP::Date; 1; }) {
6636                                 $since = HTTP::Date::str2time($if_modified);
6637                         } elsif (eval { require Time::ParseDate; 1; }) {
6638                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6639                         }
6640                         if (defined $since && $latest_epoch <= $since) {
6641                                 print $cgi->header(
6642                                         -type => $content_type,
6643                                         -charset => 'utf-8',
6644                                         -last_modified => $latest_date{'rfc2822'},
6645                                         -status => '304 Not Modified');
6646                                 return;
6647                         }
6648                 }
6649                 print $cgi->header(
6650                         -type => $content_type,
6651                         -charset => 'utf-8',
6652                         -last_modified => $latest_date{'rfc2822'});
6653         } else {
6654                 print $cgi->header(
6655                         -type => $content_type,
6656                         -charset => 'utf-8');
6657         }
6658
6659         # Optimization: skip generating the body if client asks only
6660         # for Last-Modified date.
6661         return if ($cgi->request_method() eq 'HEAD');
6662
6663         # header variables
6664         my $title = "$site_name - $project/$action";
6665         my $feed_type = 'log';
6666         if (defined $hash) {
6667                 $title .= " - '$hash'";
6668                 $feed_type = 'branch log';
6669                 if (defined $file_name) {
6670                         $title .= " :: $file_name";
6671                         $feed_type = 'history';
6672                 }
6673         } elsif (defined $file_name) {
6674                 $title .= " - $file_name";
6675                 $feed_type = 'history';
6676         }
6677         $title .= " $feed_type";
6678         my $descr = git_get_project_description($project);
6679         if (defined $descr) {
6680                 $descr = esc_html($descr);
6681         } else {
6682                 $descr = "$project " .
6683                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6684                          " feed";
6685         }
6686         my $owner = git_get_project_owner($project);
6687         $owner = esc_html($owner);
6688
6689         #header
6690         my $alt_url;
6691         if (defined $file_name) {
6692                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6693         } elsif (defined $hash) {
6694                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6695         } else {
6696                 $alt_url = href(-full=>1, action=>"summary");
6697         }
6698         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6699         if ($format eq 'rss') {
6700                 print <<XML;
6701 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6702 <channel>
6703 XML
6704                 print "<title>$title</title>\n" .
6705                       "<link>$alt_url</link>\n" .
6706                       "<description>$descr</description>\n" .
6707                       "<language>en</language>\n" .
6708                       # project owner is responsible for 'editorial' content
6709                       "<managingEditor>$owner</managingEditor>\n";
6710                 if (defined $logo || defined $favicon) {
6711                         # prefer the logo to the favicon, since RSS
6712                         # doesn't allow both
6713                         my $img = esc_url($logo || $favicon);
6714                         print "<image>\n" .
6715                               "<url>$img</url>\n" .
6716                               "<title>$title</title>\n" .
6717                               "<link>$alt_url</link>\n" .
6718                               "</image>\n";
6719                 }
6720                 if (%latest_date) {
6721                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6722                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6723                 }
6724                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6725         } elsif ($format eq 'atom') {
6726                 print <<XML;
6727 <feed xmlns="http://www.w3.org/2005/Atom">
6728 XML
6729                 print "<title>$title</title>\n" .
6730                       "<subtitle>$descr</subtitle>\n" .
6731                       '<link rel="alternate" type="text/html" href="' .
6732                       $alt_url . '" />' . "\n" .
6733                       '<link rel="self" type="' . $content_type . '" href="' .
6734                       $cgi->self_url() . '" />' . "\n" .
6735                       "<id>" . href(-full=>1) . "</id>\n" .
6736                       # use project owner for feed author
6737                       "<author><name>$owner</name></author>\n";
6738                 if (defined $favicon) {
6739                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6740                 }
6741                 if (defined $logo_url) {
6742                         # not twice as wide as tall: 72 x 27 pixels
6743                         print "<logo>" . esc_url($logo) . "</logo>\n";
6744                 }
6745                 if (! %latest_date) {
6746                         # dummy date to keep the feed valid until commits trickle in:
6747                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6748                 } else {
6749                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6750                 }
6751                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6752         }
6753
6754         # contents
6755         for (my $i = 0; $i <= $#commitlist; $i++) {
6756                 my %co = %{$commitlist[$i]};
6757                 my $commit = $co{'id'};
6758                 # we read 150, we always show 30 and the ones more recent than 48 hours
6759                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6760                         last;
6761                 }
6762                 my %cd = parse_date($co{'author_epoch'});
6763
6764                 # get list of changed files
6765                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6766                         $co{'parent'} || "--root",
6767                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6768                         or next;
6769                 my @difftree = map { chomp; $_ } <$fd>;
6770                 close $fd
6771                         or next;
6772
6773                 # print element (entry, item)
6774                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6775                 if ($format eq 'rss') {
6776                         print "<item>\n" .
6777                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6778                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6779                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6780                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6781                               "<link>$co_url</link>\n" .
6782                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6783                               "<content:encoded>" .
6784                               "<![CDATA[\n";
6785                 } elsif ($format eq 'atom') {
6786                         print "<entry>\n" .
6787                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6788                               "<updated>$cd{'iso-8601'}</updated>\n" .
6789                               "<author>\n" .
6790                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6791                         if ($co{'author_email'}) {
6792                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6793                         }
6794                         print "</author>\n" .
6795                               # use committer for contributor
6796                               "<contributor>\n" .
6797                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6798                         if ($co{'committer_email'}) {
6799                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6800                         }
6801                         print "</contributor>\n" .
6802                               "<published>$cd{'iso-8601'}</published>\n" .
6803                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6804                               "<id>$co_url</id>\n" .
6805                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6806                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6807                 }
6808                 my $comment = $co{'comment'};
6809                 print "<pre>\n";
6810                 foreach my $line (@$comment) {
6811                         $line = esc_html($line);
6812                         print "$line\n";
6813                 }
6814                 print "</pre><ul>\n";
6815                 foreach my $difftree_line (@difftree) {
6816                         my %difftree = parse_difftree_raw_line($difftree_line);
6817                         next if !$difftree{'from_id'};
6818
6819                         my $file = $difftree{'file'} || $difftree{'to_file'};
6820
6821                         print "<li>" .
6822                               "[" .
6823                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6824                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6825                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6826                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6827                                       -title => "diff"}, 'D');
6828                         if ($have_blame) {
6829                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6830                                                              file_name=>$file, hash_base=>$commit),
6831                                               -title => "blame"}, 'B');
6832                         }
6833                         # if this is not a feed of a file history
6834                         if (!defined $file_name || $file_name ne $file) {
6835                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6836                                                              file_name=>$file, hash=>$commit),
6837                                               -title => "history"}, 'H');
6838                         }
6839                         $file = esc_path($file);
6840                         print "] ".
6841                               "$file</li>\n";
6842                 }
6843                 if ($format eq 'rss') {
6844                         print "</ul>]]>\n" .
6845                               "</content:encoded>\n" .
6846                               "</item>\n";
6847                 } elsif ($format eq 'atom') {
6848                         print "</ul>\n</div>\n" .
6849                               "</content>\n" .
6850                               "</entry>\n";
6851                 }
6852         }
6853
6854         # end of feed
6855         if ($format eq 'rss') {
6856                 print "</channel>\n</rss>\n";
6857         } elsif ($format eq 'atom') {
6858                 print "</feed>\n";
6859         }
6860 }
6861
6862 sub git_rss {
6863         git_feed('rss');
6864 }
6865
6866 sub git_atom {
6867         git_feed('atom');
6868 }
6869
6870 sub git_opml {
6871         my @list = git_get_projects_list();
6872
6873         print $cgi->header(
6874                 -type => 'text/xml',
6875                 -charset => 'utf-8',
6876                 -content_disposition => 'inline; filename="opml.xml"');
6877
6878         print <<XML;
6879 <?xml version="1.0" encoding="utf-8"?>
6880 <opml version="1.0">
6881 <head>
6882   <title>$site_name OPML Export</title>
6883 </head>
6884 <body>
6885 <outline text="git RSS feeds">
6886 XML
6887
6888         foreach my $pr (@list) {
6889                 my %proj = %$pr;
6890                 my $head = git_get_head_hash($proj{'path'});
6891                 if (!defined $head) {
6892                         next;
6893                 }
6894                 $git_dir = "$projectroot/$proj{'path'}";
6895                 my %co = parse_commit($head);
6896                 if (!%co) {
6897                         next;
6898                 }
6899
6900                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6901                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6902                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6903                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6904         }
6905         print <<XML;
6906 </outline>
6907 </body>
6908 </opml>
6909 XML
6910 }