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 qw(:mode :flock);
  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 $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99 # URI of gitweb.js (JavaScript code for gitweb)
 100 our $javascript = "++GITWEB_JS++";
 101
 102 # URI and label (title) of GIT logo link
 103 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 104 #our $logo_label = "git documentation";
 105 our $logo_url = "http://git-scm.com/";
 106 our $logo_label = "git homepage";
 107
 108 # source of projects list
 109 our $projects_list = "++GITWEB_LIST++";
 110
 111 # the width (in characters) of the projects list "Description" column
 112 our $projects_list_description_width = 25;
 113
 114 # default order of projects list
 115 # valid values are none, project, descr, owner, and age
 116 our $default_projects_order = "project";
 117
 118 # show repository only if this file exists
 119 # (only effective if this variable evaluates to true)
 120 our $export_ok = "++GITWEB_EXPORT_OK++";
 121
 122 # show repository only if this subroutine returns true
 123 # when given the path to the project, for example:
 124 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 125 our $export_auth_hook = undef;
 126
 127 # only allow viewing of repositories also shown on the overview page
 128 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 129
 130 # list of git base URLs used for URL to where fetch project from,
 131 # i.e. full URL is "$git_base_url/$project"
 132 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 133
 134 # default blob_plain mimetype and default charset for text/plain blob
 135 our $default_blob_plain_mimetype = 'text/plain';
 136 our $default_text_plain_charset  = undef;
 137
 138 # file to use for guessing MIME types before trying /etc/mime.types
 139 # (relative to the current git repository)
 140 our $mimetypes_file = undef;
 141
 142 # assume this charset if line contains non-UTF-8 characters;
 143 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 144 # for which encoding all byte sequences are valid, for example
 145 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 146 # could be even 'utf-8' for the old behavior)
 147 our $fallback_encoding = 'latin1';
 148
 149 # rename detection options for git-diff and git-diff-tree
 150 # - default is '-M', with the cost proportional to
 151 #   (number of removed files) * (number of new files).
 152 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 153 #   (number of changed files + number of removed files) * (number of new files)
 154 # - even more costly is '-C', '--find-copies-harder' with cost
 155 #   (number of files in the original tree) * (number of new files)
 156 # - one might want to include '-B' option, e.g. '-B', '-M'
 157 our @diff_opts = ('-M'); # taken from git_commit
 158
 159 # Disables features that would allow repository owners to inject script into
 160 # the gitweb domain.
 161 our $prevent_xss = 0;
 162
 163 # information about snapshot formats that gitweb is capable of serving
 164 our %known_snapshot_formats = (
 165         # name => {
 166         #       'display' => display name,
 167         #       'type' => mime type,
 168         #       'suffix' => filename suffix,
 169         #       'format' => --format for git-archive,
 170         #       'compressor' => [compressor command and arguments]
 171         #                       (array reference, optional)
 172         #       'disabled' => boolean (optional)}
 173         #
 174         'tgz' => {
 175                 'display' => 'tar.gz',
 176                 'type' => 'application/x-gzip',
 177                 'suffix' => '.tar.gz',
 178                 'format' => 'tar',
 179                 'compressor' => ['gzip']},
 180
 181         'tbz2' => {
 182                 'display' => 'tar.bz2',
 183                 'type' => 'application/x-bzip2',
 184                 'suffix' => '.tar.bz2',
 185                 'format' => 'tar',
 186                 'compressor' => ['bzip2']},
 187
 188         'txz' => {
 189                 'display' => 'tar.xz',
 190                 'type' => 'application/x-xz',
 191                 'suffix' => '.tar.xz',
 192                 'format' => 'tar',
 193                 'compressor' => ['xz'],
 194                 'disabled' => 1},
 195
 196         'zip' => {
 197                 'display' => 'zip',
 198                 'type' => 'application/x-zip',
 199                 'suffix' => '.zip',
 200                 'format' => 'zip'},
 201 );
 202
 203 # Aliases so we understand old gitweb.snapshot values in repository
 204 # configuration.
 205 our %known_snapshot_format_aliases = (
 206         'gzip'  => 'tgz',
 207         'bzip2' => 'tbz2',
 208         'xz'    => 'txz',
 209
 210         # backward compatibility: legacy gitweb config support
 211         'x-gzip' => undef, 'gz' => undef,
 212         'x-bzip2' => undef, 'bz2' => undef,
 213         'x-zip' => undef, '' => undef,
 214 );
 215
 216 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 217 # are changed, it may be appropriate to change these values too via
 218 # $GITWEB_CONFIG.
 219 our %avatar_size = (
 220         'default' => 16,
 221         'double'  => 32
 222 );
 223
 224 # If it is true, exit if gitweb version and git binary version don't match
 225 our $git_versions_must_match = 0;
 226
 227 # If this variable is set and not empty, add an extra link called "git"
 228 # for each project in project list.  Full URL is "$gitlinkurl_base/$project".
 229 our $gitlinkurl_base = ("++GITWEB_BASE_URL++" =~ m!^(git://.*)$!) ? $1 : '';
 230
 231 # Used to set the maximum load that we will still respond to gitweb queries.
 232 # If server load exceed this value then return "503 server busy" error.
 233 # If gitweb cannot determined server load, it is taken to be 0.
 234 # Leave it undefined (or set to 'undef') to turn off load checking.
 235 our $maxload = 300;
 236
 237 # This enables/disables the caching layer in gitweb.  Currently supported
 238 # is only output (response) caching, similar to the one used on git.kernel.org.
 239 our $caching_enabled = 0;
 240 # Set to _initialized_ instance of cache interface implementing (at least)
 241 # get($key) and set($key, $data) methods (Cache::Cache and CHI interfaces).
 242 # If unset, GitwebCache::SimpleFileCache would be used, which is 'dumb'
 243 # (but fast) file based caching layer, currently without any support for
 244 # cache size limiting.  It is therefore recommended that the cache directory
 245 # be periodically completely deleted; this operation is safe to perform.
 246 # Suggested mechanism:
 247 # mv $cachedir $cachedir.flush && mkdir $cachedir && rm -rf $cachedir.flush
 248 our $cache;
 249 # Locations of 'cache.pm' file; if it is relative path, it is relative to
 250 # the directory gitweb is run from
 251 our $cache_pm = 'cache.pm';
 252
 253 # You define site-wide feature defaults here; override them with
 254 # $GITWEB_CONFIG as necessary.
 255 our %feature = (
 256         # feature => {
 257         #       'sub' => feature-sub (subroutine),
 258         #       'override' => allow-override (boolean),
 259         #       'default' => [ default options...] (array reference)}
 260         #
 261         # if feature is overridable (it means that allow-override has true value),
 262         # then feature-sub will be called with default options as parameters;
 263         # return value of feature-sub indicates if to enable specified feature
 264         #
 265         # if there is no 'sub' key (no feature-sub), then feature cannot be
 266         # overriden
 267         #
 268         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 269         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 270         # is enabled
 271
 272         # Enable the 'blame' blob view, showing the last commit that modified
 273         # each line in the file. This can be very CPU-intensive.
 274
 275         # To enable system wide have in $GITWEB_CONFIG
 276         # $feature{'blame'}{'default'} = [1];
 277         # To have project specific config enable override in $GITWEB_CONFIG
 278         # $feature{'blame'}{'override'} = 1;
 279         # and in project config gitweb.blame = 0|1;
 280         'blame' => {
 281                 'sub' => sub { feature_bool('blame', @_) },
 282                 'override' => 0,
 283                 'default' => [0]},
 284
 285         # Enable the 'snapshot' link, providing a compressed archive of any
 286         # tree. This can potentially generate high traffic if you have large
 287         # project.
 288
 289         # Value is a list of formats defined in %known_snapshot_formats that
 290         # you wish to offer.
 291         # To disable system wide have in $GITWEB_CONFIG
 292         # $feature{'snapshot'}{'default'} = [];
 293         # To have project specific config enable override in $GITWEB_CONFIG
 294         # $feature{'snapshot'}{'override'} = 1;
 295         # and in project config, a comma-separated list of formats or "none"
 296         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 297         'snapshot' => {
 298                 'sub' => \&feature_snapshot,
 299                 'override' => 0,
 300                 'default' => ['tgz']},
 301
 302         # Enable text search, which will list the commits which match author,
 303         # committer or commit text to a given string.  Enabled by default.
 304         # Project specific override is not supported.
 305         'search' => {
 306                 'override' => 0,
 307                 'default' => [1]},
 308
 309         # Enable grep search, which will list the files in currently selected
 310         # tree containing the given string. Enabled by default. This can be
 311         # potentially CPU-intensive, of course.
 312
 313         # To enable system wide have in $GITWEB_CONFIG
 314         # $feature{'grep'}{'default'} = [1];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'grep'}{'override'} = 1;
 317         # and in project config gitweb.grep = 0|1;
 318         'grep' => {
 319                 'sub' => sub { feature_bool('grep', @_) },
 320                 'override' => 0,
 321                 'default' => [1]},
 322
 323         # Enable the pickaxe search, which will list the commits that modified
 324         # a given string in a file. This can be practical and quite faster
 325         # alternative to 'blame', but still potentially CPU-intensive.
 326
 327         # To enable system wide have in $GITWEB_CONFIG
 328         # $feature{'pickaxe'}{'default'} = [1];
 329         # To have project specific config enable override in $GITWEB_CONFIG
 330         # $feature{'pickaxe'}{'override'} = 1;
 331         # and in project config gitweb.pickaxe = 0|1;
 332         'pickaxe' => {
 333                 'sub' => sub { feature_bool('pickaxe', @_) },
 334                 'override' => 0,
 335                 'default' => [1]},
 336
 337         # Enable showing size of blobs in a 'tree' view, in a separate
 338         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 339
 340         # To disable system wide have in $GITWEB_CONFIG
 341         # $feature{'show-sizes'}{'default'} = [0];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'show-sizes'}{'override'} = 1;
 344         # and in project config gitweb.showsizes = 0|1;
 345         'show-sizes' => {
 346                 'sub' => sub { feature_bool('showsizes', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Make gitweb use an alternative format of the URLs which can be
 351         # more readable and natural-looking: project name is embedded
 352         # directly in the path and the query string contains other
 353         # auxiliary information. All gitweb installations recognize
 354         # URL in either format; this configures in which formats gitweb
 355         # generates links.
 356
 357         # To enable system wide have in $GITWEB_CONFIG
 358         # $feature{'pathinfo'}{'default'} = [1];
 359         # Project specific override is not supported.
 360
 361         # Note that you will need to change the default location of CSS,
 362         # favicon, logo and possibly other files to an absolute URL. Also,
 363         # if gitweb.cgi serves as your indexfile, you will need to force
 364         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 365         'pathinfo' => {
 366                 'override' => 0,
 367                 'default' => [0]},
 368
 369         # Make gitweb consider projects in project root subdirectories
 370         # to be forks of existing projects. Given project $projname.git,
 371         # projects matching $projname/*.git will not be shown in the main
 372         # projects list, instead a '+' mark will be added to $projname
 373         # there and a 'forks' view will be enabled for the project, listing
 374         # all the forks. If project list is taken from a file, forks have
 375         # to be listed after the main project.
 376
 377         # To enable system wide have in $GITWEB_CONFIG
 378         # $feature{'forks'}{'default'} = [1];
 379         # Project specific override is not supported.
 380         'forks' => {
 381                 'override' => 0,
 382                 'default' => [0]},
 383
 384         # Insert custom links to the action bar of all project pages.
 385         # This enables you mainly to link to third-party scripts integrating
 386         # into gitweb; e.g. git-browser for graphical history representation
 387         # or custom web-based repository administration interface.
 388
 389         # The 'default' value consists of a list of triplets in the form
 390         # (label, link, position) where position is the label after which
 391         # to insert the link and link is a format string where %n expands
 392         # to the project name, %f to the project path within the filesystem,
 393         # %h to the current hash (h gitweb parameter) and %b to the current
 394         # hash base (hb gitweb parameter); %% expands to %.
 395
 396         # To enable system wide have in $GITWEB_CONFIG e.g.
 397         # $feature{'actions'}{'default'} = [('graphiclog',
 398         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 399         # Project specific override is not supported.
 400         'actions' => {
 401                 'override' => 0,
 402                 'default' => []},
 403
 404         # Allow gitweb scan project content tags described in ctags/
 405         # of project repository, and display the popular Web 2.0-ish
 406         # "tag cloud" near the project list. Note that this is something
 407         # COMPLETELY different from the normal Git tags.
 408
 409         # gitweb by itself can show existing tags, but it does not handle
 410         # tagging itself; you need an external application for that.
 411         # For an example script, check Girocco's cgi/tagproj.cgi.
 412         # You may want to install the HTML::TagCloud Perl module to get
 413         # a pretty tag cloud instead of just a list of tags.
 414
 415         # To enable system wide have in $GITWEB_CONFIG
 416         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 417         # Project specific override is not supported.
 418         'ctags' => {
 419                 'override' => 0,
 420                 'default' => [0]},
 421
 422         # The maximum number of patches in a patchset generated in patch
 423         # view. Set this to 0 or undef to disable patch view, or to a
 424         # negative number to remove any limit.
 425
 426         # To disable system wide have in $GITWEB_CONFIG
 427         # $feature{'patches'}{'default'} = [0];
 428         # To have project specific config enable override in $GITWEB_CONFIG
 429         # $feature{'patches'}{'override'} = 1;
 430         # and in project config gitweb.patches = 0|n;
 431         # where n is the maximum number of patches allowed in a patchset.
 432         'patches' => {
 433                 'sub' => \&feature_patches,
 434                 'override' => 0,
 435                 'default' => [16]},
 436
 437         # Avatar support. When this feature is enabled, views such as
 438         # shortlog or commit will display an avatar associated with
 439         # the email of the committer(s) and/or author(s).
 440
 441         # Currently available providers are gravatar and picon.
 442         # If an unknown provider is specified, the feature is disabled.
 443
 444         # Gravatar depends on Digest::MD5.
 445         # Picon currently relies on the indiana.edu database.
 446
 447         # To enable system wide have in $GITWEB_CONFIG
 448         # $feature{'avatar'}{'default'} = ['<provider>'];
 449         # where <provider> is either gravatar or picon.
 450         # To have project specific config enable override in $GITWEB_CONFIG
 451         # $feature{'avatar'}{'override'} = 1;
 452         # and in project config gitweb.avatar = <provider>;
 453         'avatar' => {
 454                 'sub' => \&feature_avatar,
 455                 'override' => 0,
 456                 'default' => ['']},
 457
 458         # Enable displaying how much time and how many git commands
 459         # it took to generate and display page.  Disabled by default.
 460         # Project specific override is not supported.
 461         'timed' => {
 462                 'override' => 0,
 463                 'default' => [0]},
 464
 465         # Enable turning some links into links to actions which require
 466         # JavaScript to run (like 'blame_incremental').  Not enabled by
 467         # default.  Project specific override is currently not supported.
 468         'javascript-actions' => {
 469                 'override' => 0,
 470                 'default' => [0]},
 471 );
 472
 473 sub gitweb_get_feature {
 474         my ($name) = @_;
 475         return unless exists $feature{$name};
 476         my ($sub, $override, @defaults) = (
 477                 $feature{$name}{'sub'},
 478                 $feature{$name}{'override'},
 479                 @{$feature{$name}{'default'}});
 480         if (!$override) { return @defaults; }
 481         if (!defined $sub) {
 482                 warn "feature $name is not overridable";
 483                 return @defaults;
 484         }
 485         return $sub->(@defaults);
 486 }
 487
 488 # A wrapper to check if a given feature is enabled.
 489 # With this, you can say
 490 #
 491 #   my $bool_feat = gitweb_check_feature('bool_feat');
 492 #   gitweb_check_feature('bool_feat') or somecode;
 493 #
 494 # instead of
 495 #
 496 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 497 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 498 #
 499 sub gitweb_check_feature {
 500         return (gitweb_get_feature(@_))[0];
 501 }
 502
 503
 504 sub feature_bool {
 505         my $key = shift;
 506         my ($val) = git_get_project_config($key, '--bool');
 507
 508         if (!defined $val) {
 509                 return ($_[0]);
 510         } elsif ($val eq 'true') {
 511                 return (1);
 512         } elsif ($val eq 'false') {
 513                 return (0);
 514         }
 515 }
 516
 517 sub feature_snapshot {
 518         my (@fmts) = @_;
 519
 520         my ($val) = git_get_project_config('snapshot');
 521
 522         if ($val) {
 523                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 524         }
 525
 526         return @fmts;
 527 }
 528
 529 sub feature_patches {
 530         my @val = (git_get_project_config('patches', '--int'));
 531
 532         if (@val) {
 533                 return @val;
 534         }
 535
 536         return ($_[0]);
 537 }
 538
 539 sub feature_avatar {
 540         my @val = (git_get_project_config('avatar'));
 541
 542         return @val ? @val : @_;
 543 }
 544
 545 # checking HEAD file with -e is fragile if the repository was
 546 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 547 # and then pruned.
 548 sub check_head_link {
 549         my ($dir) = @_;
 550         my $headfile = "$dir/HEAD";
 551         return ((-e $headfile) ||
 552                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 553 }
 554
 555 sub check_export_ok {
 556         my ($dir) = @_;
 557         return (check_head_link($dir) &&
 558                 (!$export_ok || -e "$dir/$export_ok") &&
 559                 (!$export_auth_hook || $export_auth_hook->($dir)));
 560 }
 561
 562 # process alternate names for backward compatibility
 563 # filter out unsupported (unknown) snapshot formats
 564 sub filter_snapshot_fmts {
 565         my @fmts = @_;
 566
 567         @fmts = map {
 568                 exists $known_snapshot_format_aliases{$_} ?
 569                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 570         @fmts = grep {
 571                 exists $known_snapshot_formats{$_} &&
 572                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 573 }
 574
 575 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 576 if (-e $GITWEB_CONFIG) {
 577         do $GITWEB_CONFIG;
 578 } else {
 579         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 580         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 581 }
 582
 583 # Where to write gitweb output (filehandle)
 584 our $out = \*STDOUT;
 585
 586 # Get loadavg of system, to compare against $maxload.
 587 # Currently it requires '/proc/loadavg' present to get loadavg;
 588 # if it is not present it returns 0, which means no load checking.
 589 sub get_loadavg {
 590         open my $fd, '<', '/proc/loadavg'
 591                 or return 0;
 592         my @load = split(/\s+/, scalar <$fd>);
 593         close $fd;
 594
 595         # The first three columns measure CPU and IO utilization of the last one,
 596         # five, and 10 minute periods.  The fourth column shows the number of
 597         # currently running processes and the total number of processes in the m/n
 598         # format.  The last column displays the last process ID used.
 599         return $load[0] || 0;
 600 }
 601
 602 if (defined $maxload && get_loadavg() > $maxload) {
 603         die_error(503, "The load average on the server is too high");
 604 }
 605
 606 # version of the core git binary
 607 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 608 $number_of_git_cmds++;
 609
 610 # Throw an error if git versions does not match, if $git_versions_must_match is true.
 611 if ($git_versions_must_match &&
 612     $git_version ne $version) {
 613         git_header_html('500 - Internal Server Error');
 614         my $admin_contact =
 615                 defined $ENV{'SERVER_ADMIN'} ? ", $ENV{'SERVER_ADMIN'}," : '';
 616         print {$out} <<"EOT";
 617 <div class="page_body">
 618 <br /><br />
 619 500 - Internal Server Error
 620 <br />
 621 </div>
 622 <hr />
 623 <div class="readme">
 624 <h1 align="center">*** Warning ***</h1>
 625 <p>
 626 This version of gitweb was compiled for <b>@{[esc_html($version)]}</b>,
 627 however git version <b>@{[esc_html($git_version)]}</b> was found on server,
 628 and administrator requested strict version checking.
 629 </p>
 630 <p>
 631 Please contact the server administrator${admin_contact} to either configure
 632 gitweb to allow mismatched versions, or update git or gitweb installation.
 633 </p>
 634 </div>
 635 EOT
 636         git_footer_html();
 637         exit;
 638 }
 639
 640 $projects_list ||= $projectroot;
 641
 642 # ======================================================================
 643 # input validation and dispatch
 644
 645 # input parameters can be collected from a variety of sources (presently, CGI
 646 # and PATH_INFO), so we define an %input_params hash that collects them all
 647 # together during validation: this allows subsequent uses (e.g. href()) to be
 648 # agnostic of the parameter origin
 649
 650 our %input_params = ();
 651
 652 # input parameters are stored with the long parameter name as key. This will
 653 # also be used in the href subroutine to convert parameters to their CGI
 654 # equivalent, and since the href() usage is the most frequent one, we store
 655 # the name -> CGI key mapping here, instead of the reverse.
 656 #
 657 # XXX: Warning: If you touch this, check the search form for updating,
 658 # too.
 659
 660 our @cgi_param_mapping = (
 661         project => "p",
 662         action => "a",
 663         file_name => "f",
 664         file_parent => "fp",
 665         hash => "h",
 666         hash_parent => "hp",
 667         hash_base => "hb",
 668         hash_parent_base => "hpb",
 669         page => "pg",
 670         order => "o",
 671         searchtext => "s",
 672         searchtype => "st",
 673         snapshot_format => "sf",
 674         extra_options => "opt",
 675         search_use_regexp => "sr",
 676         # this must be last entry (for manipulation from JavaScript)
 677         javascript => "js"
 678 );
 679 our %cgi_param_mapping = @cgi_param_mapping;
 680
 681 # we will also need to know the possible actions, for validation
 682 our %actions = (
 683         "blame" => \&git_blame,
 684         "blame_incremental" => \&git_blame_incremental,
 685         "blame_data" => \&git_blame_data,
 686         "blobdiff" => \&git_blobdiff,
 687         "blobdiff_plain" => \&git_blobdiff_plain,
 688         "blob" => \&git_blob,
 689         "blob_plain" => \&git_blob_plain,
 690         "commitdiff" => \&git_commitdiff,
 691         "commitdiff_plain" => \&git_commitdiff_plain,
 692         "commit" => \&git_commit,
 693         "forks" => \&git_forks,
 694         "heads" => \&git_heads,
 695         "history" => \&git_history,
 696         "log" => \&git_log,
 697         "patch" => \&git_patch,
 698         "patches" => \&git_patches,
 699         "rss" => \&git_rss,
 700         "atom" => \&git_atom,
 701         "search" => \&git_search,
 702         "search_help" => \&git_search_help,
 703         "shortlog" => \&git_shortlog,
 704         "summary" => \&git_summary,
 705         "tag" => \&git_tag,
 706         "tags" => \&git_tags,
 707         "tree" => \&git_tree,
 708         "snapshot" => \&git_snapshot,
 709         "object" => \&git_object,
 710         # those below don't need $project
 711         "opml" => \&git_opml,
 712         "project_list" => \&git_project_list,
 713         "project_index" => \&git_project_index,
 714 );
 715
 716 # finally, we have the hash of allowed extra_options for the commands that
 717 # allow them
 718 our %allowed_options = (
 719         "--no-merges" => [ qw(rss atom log shortlog history) ],
 720 );
 721
 722 # fill %input_params with the CGI parameters. All values except for 'opt'
 723 # should be single values, but opt can be an array. We should probably
 724 # build an array of parameters that can be multi-valued, but since for the time
 725 # being it's only this one, we just single it out
 726 while (my ($name, $symbol) = each %cgi_param_mapping) {
 727         if ($symbol eq 'opt') {
 728                 $input_params{$name} = [ $cgi->param($symbol) ];
 729         } else {
 730                 $input_params{$name} = $cgi->param($symbol);
 731         }
 732 }
 733
 734 # now read PATH_INFO and update the parameter list for missing parameters
 735 sub evaluate_path_info {
 736         return if defined $input_params{'project'};
 737         return if !$path_info;
 738         $path_info =~ s,^/+,,;
 739         return if !$path_info;
 740
 741         # find which part of PATH_INFO is project
 742         my $project = $path_info;
 743         $project =~ s,/+$,,;
 744         while ($project && !check_head_link("$projectroot/$project")) {
 745                 $project =~ s,/*[^/]*$,,;
 746         }
 747         return unless $project;
 748         $input_params{'project'} = $project;
 749
 750         # do not change any parameters if an action is given using the query string
 751         return if $input_params{'action'};
 752         $path_info =~ s,^\Q$project\E/*,,;
 753
 754         # next, check if we have an action
 755         my $action = $path_info;
 756         $action =~ s,/.*$,,;
 757         if (exists $actions{$action}) {
 758                 $path_info =~ s,^$action/*,,;
 759                 $input_params{'action'} = $action;
 760         }
 761
 762         # list of actions that want hash_base instead of hash, but can have no
 763         # pathname (f) parameter
 764         my @wants_base = (
 765                 'tree',
 766                 'history',
 767         );
 768
 769         # we want to catch
 770         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 771         my ($parentrefname, $parentpathname, $refname, $pathname) =
 772                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 773
 774         # first, analyze the 'current' part
 775         if (defined $pathname) {
 776                 # we got "branch:filename" or "branch:dir/"
 777                 # we could use git_get_type(branch:pathname), but:
 778                 # - it needs $git_dir
 779                 # - it does a git() call
 780                 # - the convention of terminating directories with a slash
 781                 #   makes it superfluous
 782                 # - embedding the action in the PATH_INFO would make it even
 783                 #   more superfluous
 784                 $pathname =~ s,^/+,,;
 785                 if (!$pathname || substr($pathname, -1) eq "/") {
 786                         $input_params{'action'} ||= "tree";
 787                         $pathname =~ s,/$,,;
 788                 } else {
 789                         # the default action depends on whether we had parent info
 790                         # or not
 791                         if ($parentrefname) {
 792                                 $input_params{'action'} ||= "blobdiff_plain";
 793                         } else {
 794                                 $input_params{'action'} ||= "blob_plain";
 795                         }
 796                 }
 797                 $input_params{'hash_base'} ||= $refname;
 798                 $input_params{'file_name'} ||= $pathname;
 799         } elsif (defined $refname) {
 800                 # we got "branch". In this case we have to choose if we have to
 801                 # set hash or hash_base.
 802                 #
 803                 # Most of the actions without a pathname only want hash to be
 804                 # set, except for the ones specified in @wants_base that want
 805                 # hash_base instead. It should also be noted that hand-crafted
 806                 # links having 'history' as an action and no pathname or hash
 807                 # set will fail, but that happens regardless of PATH_INFO.
 808                 $input_params{'action'} ||= "shortlog";
 809                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 810                         $input_params{'hash_base'} ||= $refname;
 811                 } else {
 812                         $input_params{'hash'} ||= $refname;
 813                 }
 814         }
 815
 816         # next, handle the 'parent' part, if present
 817         if (defined $parentrefname) {
 818                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 819                 # someproject/blobdiff/oldrev..newrev:/filename
 820                 if ($parentpathname) {
 821                         $parentpathname =~ s,^/+,,;
 822                         $parentpathname =~ s,/$,,;
 823                         $input_params{'file_parent'} ||= $parentpathname;
 824                 } else {
 825                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 826                 }
 827                 # we assume that hash_parent_base is wanted if a path was specified,
 828                 # or if the action wants hash_base instead of hash
 829                 if (defined $input_params{'file_parent'} ||
 830                         grep { $_ eq $input_params{'action'} } @wants_base) {
 831                         $input_params{'hash_parent_base'} ||= $parentrefname;
 832                 } else {
 833                         $input_params{'hash_parent'} ||= $parentrefname;
 834                 }
 835         }
 836
 837         # for the snapshot action, we allow URLs in the form
 838         # $project/snapshot/$hash.ext
 839         # where .ext determines the snapshot and gets removed from the
 840         # passed $refname to provide the $hash.
 841         #
 842         # To be able to tell that $refname includes the format extension, we
 843         # require the following two conditions to be satisfied:
 844         # - the hash input parameter MUST have been set from the $refname part
 845         #   of the URL (i.e. they must be equal)
 846         # - the snapshot format MUST NOT have been defined already (e.g. from
 847         #   CGI parameter sf)
 848         # It's also useless to try any matching unless $refname has a dot,
 849         # so we check for that too
 850         if (defined $input_params{'action'} &&
 851                 $input_params{'action'} eq 'snapshot' &&
 852                 defined $refname && index($refname, '.') != -1 &&
 853                 $refname eq $input_params{'hash'} &&
 854                 !defined $input_params{'snapshot_format'}) {
 855                 # We loop over the known snapshot formats, checking for
 856                 # extensions. Allowed extensions are both the defined suffix
 857                 # (which includes the initial dot already) and the snapshot
 858                 # format key itself, with a prepended dot
 859                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 860                         my $hash = $refname;
 861                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 862                                 next;
 863                         }
 864                         my $sfx = $1;
 865                         # a valid suffix was found, so set the snapshot format
 866                         # and reset the hash parameter
 867                         $input_params{'snapshot_format'} = $fmt;
 868                         $input_params{'hash'} = $hash;
 869                         # we also set the format suffix to the one requested
 870                         # in the URL: this way a request for e.g. .tgz returns
 871                         # a .tgz instead of a .tar.gz
 872                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 873                         last;
 874                 }
 875         }
 876 }
 877 evaluate_path_info();
 878
 879 our $action = $input_params{'action'};
 880 if (defined $action) {
 881         if (!validate_action($action)) {
 882                 die_error(400, "Invalid action parameter");
 883         }
 884 }
 885
 886 # parameters which are pathnames
 887 our $project = $input_params{'project'};
 888 if (defined $project) {
 889         if (!validate_project($project)) {
 890                 undef $project;
 891                 die_error(404, "No such project");
 892         }
 893 }
 894
 895 our $file_name = $input_params{'file_name'};
 896 if (defined $file_name) {
 897         if (!validate_pathname($file_name)) {
 898                 die_error(400, "Invalid file parameter");
 899         }
 900 }
 901
 902 our $file_parent = $input_params{'file_parent'};
 903 if (defined $file_parent) {
 904         if (!validate_pathname($file_parent)) {
 905                 die_error(400, "Invalid file parent parameter");
 906         }
 907 }
 908
 909 # parameters which are refnames
 910 our $hash = $input_params{'hash'};
 911 if (defined $hash) {
 912         if (!validate_refname($hash)) {
 913                 die_error(400, "Invalid hash parameter");
 914         }
 915 }
 916
 917 our $hash_parent = $input_params{'hash_parent'};
 918 if (defined $hash_parent) {
 919         if (!validate_refname($hash_parent)) {
 920                 die_error(400, "Invalid hash parent parameter");
 921         }
 922 }
 923
 924 our $hash_base = $input_params{'hash_base'};
 925 if (defined $hash_base) {
 926         if (!validate_refname($hash_base)) {
 927                 die_error(400, "Invalid hash base parameter");
 928         }
 929 }
 930
 931 our @extra_options = @{$input_params{'extra_options'}};
 932 # @extra_options is always defined, since it can only be (currently) set from
 933 # CGI, and $cgi->param() returns the empty array in array context if the param
 934 # is not set
 935 foreach my $opt (@extra_options) {
 936         if (not exists $allowed_options{$opt}) {
 937                 die_error(400, "Invalid option parameter");
 938         }
 939         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 940                 die_error(400, "Invalid option parameter for this action");
 941         }
 942 }
 943
 944 our $hash_parent_base = $input_params{'hash_parent_base'};
 945 if (defined $hash_parent_base) {
 946         if (!validate_refname($hash_parent_base)) {
 947                 die_error(400, "Invalid hash parent base parameter");
 948         }
 949 }
 950
 951 # other parameters
 952 our $page = $input_params{'page'};
 953 if (defined $page) {
 954         if ($page =~ m/[^0-9]/) {
 955                 die_error(400, "Invalid page parameter");
 956         }
 957 }
 958
 959 our $searchtype = $input_params{'searchtype'};
 960 if (defined $searchtype) {
 961         if ($searchtype =~ m/[^a-z]/) {
 962                 die_error(400, "Invalid searchtype parameter");
 963         }
 964 }
 965
 966 our $search_use_regexp = $input_params{'search_use_regexp'};
 967
 968 our $searchtext = $input_params{'searchtext'};
 969 our $search_regexp;
 970 if (defined $searchtext) {
 971         if (length($searchtext) < 2) {
 972                 die_error(403, "At least two characters are required for search parameter");
 973         }
 974         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 975 }
 976
 977 # path to the current git repository
 978 our $git_dir;
 979 $git_dir = "$projectroot/$project" if $project;
 980
 981 # list of supported snapshot formats
 982 our @snapshot_fmts = gitweb_get_feature('snapshot');
 983 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 984
 985 # check that the avatar feature is set to a known provider name,
 986 # and for each provider check if the dependencies are satisfied.
 987 # if the provider name is invalid or the dependencies are not met,
 988 # reset $git_avatar to the empty string.
 989 our ($git_avatar) = gitweb_get_feature('avatar');
 990 if ($git_avatar eq 'gravatar') {
 991         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 992 } elsif ($git_avatar eq 'picon') {
 993         # no dependencies
 994 } else {
 995         $git_avatar = '';
 996 }
 997
 998 # dispatch
 999 if (!defined $action) {
1000         if (defined $hash) {
1001                 $action = git_get_type($hash);
1002         } elsif (defined $hash_base && defined $file_name) {
1003                 $action = git_get_type("$hash_base:$file_name");
1004         } elsif (defined $project) {
1005                 $action = 'summary';
1006         } else {
1007                 $action = 'project_list';
1008         }
1009 }
1010 if (!defined($actions{$action})) {
1011         die_error(400, "Unknown action");
1012 }
1013 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1014     !$project) {
1015         die_error(400, "Project needed");
1016 }
1017
1018 if ($caching_enabled) {
1019         do $cache_pm;
1020         die $@ if $@;
1021
1022         $cache ||= GitwebCache::SimpleFileCache->new({
1023                 'cache_root'  => '/tmp/cache',
1024                 'cache_depth' => 2,
1025                 'expires_in'  => 20, # in seconds
1026                 'generating_info' => \&git_generating_data_html,
1027         });
1028         cache_fetch($cache, $action);
1029 } else {
1030         $actions{$action}->();
1031 }
1032
1033 exit;
1034
1035 ## ======================================================================
1036 ## action links
1037
1038 # possible values of extra options
1039 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1040 # -replay => 1      - start from a current view (replay with modifications)
1041 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1042 sub href {
1043         my %params = @_;
1044         # default is to use -absolute url() i.e. $my_uri
1045         my $href = $params{-full} ? $my_url : $my_uri;
1046
1047         $params{'project'} = $project unless exists $params{'project'};
1048
1049         if ($params{-replay}) {
1050                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1051                         if (!exists $params{$name}) {
1052                                 $params{$name} = $input_params{$name};
1053                         }
1054                 }
1055         }
1056
1057         my $use_pathinfo = gitweb_check_feature('pathinfo');
1058         if (defined $params{'project'} &&
1059             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1060                 # try to put as many parameters as possible in PATH_INFO:
1061                 #   - project name
1062                 #   - action
1063                 #   - hash_parent or hash_parent_base:/file_parent
1064                 #   - hash or hash_base:/filename
1065                 #   - the snapshot_format as an appropriate suffix
1066
1067                 # When the script is the root DirectoryIndex for the domain,
1068                 # $href here would be something like http://gitweb.example.com/
1069                 # Thus, we strip any trailing / from $href, to spare us double
1070                 # slashes in the final URL
1071                 $href =~ s,/$,,;
1072
1073                 # Then add the project name, if present
1074                 $href .= "/".esc_url($params{'project'});
1075                 delete $params{'project'};
1076
1077                 # since we destructively absorb parameters, we keep this
1078                 # boolean that remembers if we're handling a snapshot
1079                 my $is_snapshot = $params{'action'} eq 'snapshot';
1080
1081                 # Summary just uses the project path URL, any other action is
1082                 # added to the URL
1083                 if (defined $params{'action'}) {
1084                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1085                         delete $params{'action'};
1086                 }
1087
1088                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1089                 # stripping nonexistent or useless pieces
1090                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1091                         || $params{'hash_parent'} || $params{'hash'});
1092                 if (defined $params{'hash_base'}) {
1093                         if (defined $params{'hash_parent_base'}) {
1094                                 $href .= esc_url($params{'hash_parent_base'});
1095                                 # skip the file_parent if it's the same as the file_name
1096                                 if (defined $params{'file_parent'}) {
1097                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1098                                                 delete $params{'file_parent'};
1099                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1100                                                 $href .= ":/".esc_url($params{'file_parent'});
1101                                                 delete $params{'file_parent'};
1102                                         }
1103                                 }
1104                                 $href .= "..";
1105                                 delete $params{'hash_parent'};
1106                                 delete $params{'hash_parent_base'};
1107                         } elsif (defined $params{'hash_parent'}) {
1108                                 $href .= esc_url($params{'hash_parent'}). "..";
1109                                 delete $params{'hash_parent'};
1110                         }
1111
1112                         $href .= esc_url($params{'hash_base'});
1113                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1114                                 $href .= ":/".esc_url($params{'file_name'});
1115                                 delete $params{'file_name'};
1116                         }
1117                         delete $params{'hash'};
1118                         delete $params{'hash_base'};
1119                 } elsif (defined $params{'hash'}) {
1120                         $href .= esc_url($params{'hash'});
1121                         delete $params{'hash'};
1122                 }
1123
1124                 # If the action was a snapshot, we can absorb the
1125                 # snapshot_format parameter too
1126                 if ($is_snapshot) {
1127                         my $fmt = $params{'snapshot_format'};
1128                         # snapshot_format should always be defined when href()
1129                         # is called, but just in case some code forgets, we
1130                         # fall back to the default
1131                         $fmt ||= $snapshot_fmts[0];
1132                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1133                         delete $params{'snapshot_format'};
1134                 }
1135         }
1136
1137         # now encode the parameters explicitly
1138         my @result = ();
1139         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1140                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1141                 if (defined $params{$name}) {
1142                         if (ref($params{$name}) eq "ARRAY") {
1143                                 foreach my $par (@{$params{$name}}) {
1144                                         push @result, $symbol . "=" . esc_param($par);
1145                                 }
1146                         } else {
1147                                 push @result, $symbol . "=" . esc_param($params{$name});
1148                         }
1149                 }
1150         }
1151         $href .= "?" . join(';', @result) if scalar @result;
1152
1153         return $href;
1154 }
1155
1156
1157 ## ======================================================================
1158 ## validation, quoting/unquoting and escaping
1159
1160 sub validate_action {
1161         my $input = shift || return undef;
1162         return undef unless exists $actions{$input};
1163         return $input;
1164 }
1165
1166 sub validate_project {
1167         my $input = shift || return undef;
1168         if (!validate_pathname($input) ||
1169                 !(-d "$projectroot/$input") ||
1170                 !check_export_ok("$projectroot/$input") ||
1171                 ($strict_export && !project_in_list($input))) {
1172                 return undef;
1173         } else {
1174                 return $input;
1175         }
1176 }
1177
1178 sub validate_pathname {
1179         my $input = shift || return undef;
1180
1181         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1182         # at the beginning, at the end, and between slashes.
1183         # also this catches doubled slashes
1184         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1185                 return undef;
1186         }
1187         # no null characters
1188         if ($input =~ m!\0!) {
1189                 return undef;
1190         }
1191         return $input;
1192 }
1193
1194 sub validate_refname {
1195         my $input = shift || return undef;
1196
1197         # textual hashes are O.K.
1198         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1199                 return $input;
1200         }
1201         # it must be correct pathname
1202         $input = validate_pathname($input)
1203                 or return undef;
1204         # restrictions on ref name according to git-check-ref-format
1205         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1206                 return undef;
1207         }
1208         return $input;
1209 }
1210
1211 # decode sequences of octets in utf8 into Perl's internal form,
1212 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1213 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1214 sub to_utf8 {
1215         my $str = shift;
1216         if (utf8::valid($str)) {
1217                 utf8::decode($str);
1218                 return $str;
1219         } else {
1220                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1221         }
1222 }
1223
1224 # quote unsafe chars, but keep the slash, even when it's not
1225 # correct, but quoted slashes look too horrible in bookmarks
1226 sub esc_param {
1227         my $str = shift;
1228         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1229         $str =~ s/ /\+/g;
1230         return $str;
1231 }
1232
1233 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1234 sub esc_url {
1235         my $str = shift;
1236         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1237         $str =~ s/\+/%2B/g;
1238         $str =~ s/ /\+/g;
1239         return $str;
1240 }
1241
1242 # replace invalid utf8 character with SUBSTITUTION sequence
1243 sub esc_html {
1244         my $str = shift;
1245         my %opts = @_;
1246
1247         $str = to_utf8($str);
1248         $str = $cgi->escapeHTML($str);
1249         if ($opts{'-nbsp'}) {
1250                 $str =~ s/ /&nbsp;/g;
1251         }
1252         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1253         return $str;
1254 }
1255
1256 # quote control characters and escape filename to HTML
1257 sub esc_path {
1258         my $str = shift;
1259         my %opts = @_;
1260
1261         $str = to_utf8($str);
1262         $str = $cgi->escapeHTML($str);
1263         if ($opts{'-nbsp'}) {
1264                 $str =~ s/ /&nbsp;/g;
1265         }
1266         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1267         return $str;
1268 }
1269
1270 # Make control characters "printable", using character escape codes (CEC)
1271 sub quot_cec {
1272         my $cntrl = shift;
1273         my %opts = @_;
1274         my %es = ( # character escape codes, aka escape sequences
1275                 "\t" => '\t',   # tab            (HT)
1276                 "\n" => '\n',   # line feed      (LF)
1277                 "\r" => '\r',   # carrige return (CR)
1278                 "\f" => '\f',   # form feed      (FF)
1279                 "\b" => '\b',   # backspace      (BS)
1280                 "\a" => '\a',   # alarm (bell)   (BEL)
1281                 "\e" => '\e',   # escape         (ESC)
1282                 "\013" => '\v', # vertical tab   (VT)
1283                 "\000" => '\0', # nul character  (NUL)
1284         );
1285         my $chr = ( (exists $es{$cntrl})
1286                     ? $es{$cntrl}
1287                     : sprintf('\%2x', ord($cntrl)) );
1288         if ($opts{-nohtml}) {
1289                 return $chr;
1290         } else {
1291                 return "<span class=\"cntrl\">$chr</span>";
1292         }
1293 }
1294
1295 # Alternatively use unicode control pictures codepoints,
1296 # Unicode "printable representation" (PR)
1297 sub quot_upr {
1298         my $cntrl = shift;
1299         my %opts = @_;
1300
1301         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1302         if ($opts{-nohtml}) {
1303                 return $chr;
1304         } else {
1305                 return "<span class=\"cntrl\">$chr</span>";
1306         }
1307 }
1308
1309 # git may return quoted and escaped filenames
1310 sub unquote {
1311         my $str = shift;
1312
1313         sub unq {
1314                 my $seq = shift;
1315                 my %es = ( # character escape codes, aka escape sequences
1316                         't' => "\t",   # tab            (HT, TAB)
1317                         'n' => "\n",   # newline        (NL)
1318                         'r' => "\r",   # return         (CR)
1319                         'f' => "\f",   # form feed      (FF)
1320                         'b' => "\b",   # backspace      (BS)
1321                         'a' => "\a",   # alarm (bell)   (BEL)
1322                         'e' => "\e",   # escape         (ESC)
1323                         'v' => "\013", # vertical tab   (VT)
1324                 );
1325
1326                 if ($seq =~ m/^[0-7]{1,3}$/) {
1327                         # octal char sequence
1328                         return chr(oct($seq));
1329                 } elsif (exists $es{$seq}) {
1330                         # C escape sequence, aka character escape code
1331                         return $es{$seq};
1332                 }
1333                 # quoted ordinary character
1334                 return $seq;
1335         }
1336
1337         if ($str =~ m/^"(.*)"$/) {
1338                 # needs unquoting
1339                 $str = $1;
1340                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1341         }
1342         return $str;
1343 }
1344
1345 # escape tabs (convert tabs to spaces)
1346 sub untabify {
1347         my $line = shift;
1348
1349         while ((my $pos = index($line, "\t")) != -1) {
1350                 if (my $count = (8 - ($pos % 8))) {
1351                         my $spaces = ' ' x $count;
1352                         $line =~ s/\t/$spaces/;
1353                 }
1354         }
1355
1356         return $line;
1357 }
1358
1359 sub project_in_list {
1360         my $project = shift;
1361         my @list = git_get_projects_list();
1362         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1363 }
1364
1365 ## ----------------------------------------------------------------------
1366 ## HTML aware string manipulation
1367
1368 # Try to chop given string on a word boundary between position
1369 # $len and $len+$add_len. If there is no word boundary there,
1370 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1371 # (marking chopped part) would be longer than given string.
1372 sub chop_str {
1373         my $str = shift;
1374         my $len = shift;
1375         my $add_len = shift || 10;
1376         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1377
1378         # Make sure perl knows it is utf8 encoded so we don't
1379         # cut in the middle of a utf8 multibyte char.
1380         $str = to_utf8($str);
1381
1382         # allow only $len chars, but don't cut a word if it would fit in $add_len
1383         # if it doesn't fit, cut it if it's still longer than the dots we would add
1384         # remove chopped character entities entirely
1385
1386         # when chopping in the middle, distribute $len into left and right part
1387         # return early if chopping wouldn't make string shorter
1388         if ($where eq 'center') {
1389                 return $str if ($len + 5 >= length($str)); # filler is length 5
1390                 $len = int($len/2);
1391         } else {
1392                 return $str if ($len + 4 >= length($str)); # filler is length 4
1393         }
1394
1395         # regexps: ending and beginning with word part up to $add_len
1396         my $endre = qr/.{$len}\w{0,$add_len}/;
1397         my $begre = qr/\w{0,$add_len}.{$len}/;
1398
1399         if ($where eq 'left') {
1400                 $str =~ m/^(.*?)($begre)$/;
1401                 my ($lead, $body) = ($1, $2);
1402                 if (length($lead) > 4) {
1403                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1404                         $lead = " ...";
1405                 }
1406                 return "$lead$body";
1407
1408         } elsif ($where eq 'center') {
1409                 $str =~ m/^($endre)(.*)$/;
1410                 my ($left, $str)  = ($1, $2);
1411                 $str =~ m/^(.*?)($begre)$/;
1412                 my ($mid, $right) = ($1, $2);
1413                 if (length($mid) > 5) {
1414                         $left  =~ s/&[^;]*$//;
1415                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1416                         $mid = " ... ";
1417                 }
1418                 return "$left$mid$right";
1419
1420         } else {
1421                 $str =~ m/^($endre)(.*)$/;
1422                 my $body = $1;
1423                 my $tail = $2;
1424                 if (length($tail) > 4) {
1425                         $body =~ s/&[^;]*$//;
1426                         $tail = "... ";
1427                 }
1428                 return "$body$tail";
1429         }
1430 }
1431
1432 # takes the same arguments as chop_str, but also wraps a <span> around the
1433 # result with a title attribute if it does get chopped. Additionally, the
1434 # string is HTML-escaped.
1435 sub chop_and_escape_str {
1436         my ($str) = @_;
1437
1438         my $chopped = chop_str(@_);
1439         if ($chopped eq $str) {
1440                 return esc_html($chopped);
1441         } else {
1442                 $str =~ s/[[:cntrl:]]/?/g;
1443                 return $cgi->span({-title=>$str}, esc_html($chopped));
1444         }
1445 }
1446
1447 ## ----------------------------------------------------------------------
1448 ## functions returning short strings
1449
1450 # CSS class for given age value (in seconds)
1451 sub age_class {
1452         my $age = shift;
1453
1454         if (!defined $age) {
1455                 return "noage";
1456         } elsif ($age < 60*60*2) {
1457                 return "age0";
1458         } elsif ($age < 60*60*24*2) {
1459                 return "age1";
1460         } else {
1461                 return "age2";
1462         }
1463 }
1464
1465 # convert age in seconds to "nn units ago" string
1466 sub age_string {
1467         my $age = shift;
1468         my $age_str;
1469
1470         if ($age > 60*60*24*365*2) {
1471                 $age_str = (int $age/60/60/24/365);
1472                 $age_str .= " years ago";
1473         } elsif ($age > 60*60*24*(365/12)*2) {
1474                 $age_str = int $age/60/60/24/(365/12);
1475                 $age_str .= " months ago";
1476         } elsif ($age > 60*60*24*7*2) {
1477                 $age_str = int $age/60/60/24/7;
1478                 $age_str .= " weeks ago";
1479         } elsif ($age > 60*60*24*2) {
1480                 $age_str = int $age/60/60/24;
1481                 $age_str .= " days ago";
1482         } elsif ($age > 60*60*2) {
1483                 $age_str = int $age/60/60;
1484                 $age_str .= " hours ago";
1485         } elsif ($age > 60*2) {
1486                 $age_str = int $age/60;
1487                 $age_str .= " min ago";
1488         } elsif ($age > 2) {
1489                 $age_str = int $age;
1490                 $age_str .= " sec ago";
1491         } else {
1492                 $age_str .= " right now";
1493         }
1494         return $age_str;
1495 }
1496
1497 use constant {
1498         S_IFINVALID => 0030000,
1499         S_IFGITLINK => 0160000,
1500 };
1501
1502 # submodule/subproject, a commit object reference
1503 sub S_ISGITLINK {
1504         my $mode = shift;
1505
1506         return (($mode & S_IFMT) == S_IFGITLINK)
1507 }
1508
1509 # convert file mode in octal to symbolic file mode string
1510 sub mode_str {
1511         my $mode = oct shift;
1512
1513         if (S_ISGITLINK($mode)) {
1514                 return 'm---------';
1515         } elsif (S_ISDIR($mode & S_IFMT)) {
1516                 return 'drwxr-xr-x';
1517         } elsif (S_ISLNK($mode)) {
1518                 return 'lrwxrwxrwx';
1519         } elsif (S_ISREG($mode)) {
1520                 # git cares only about the executable bit
1521                 if ($mode & S_IXUSR) {
1522                         return '-rwxr-xr-x';
1523                 } else {
1524                         return '-rw-r--r--';
1525                 };
1526         } else {
1527                 return '----------';
1528         }
1529 }
1530
1531 # convert file mode in octal to file type string
1532 sub file_type {
1533         my $mode = shift;
1534
1535         if ($mode !~ m/^[0-7]+$/) {
1536                 return $mode;
1537         } else {
1538                 $mode = oct $mode;
1539         }
1540
1541         if (S_ISGITLINK($mode)) {
1542                 return "submodule";
1543         } elsif (S_ISDIR($mode & S_IFMT)) {
1544                 return "directory";
1545         } elsif (S_ISLNK($mode)) {
1546                 return "symlink";
1547         } elsif (S_ISREG($mode)) {
1548                 return "file";
1549         } else {
1550                 return "unknown";
1551         }
1552 }
1553
1554 # convert file mode in octal to file type description string
1555 sub file_type_long {
1556         my $mode = shift;
1557
1558         if ($mode !~ m/^[0-7]+$/) {
1559                 return $mode;
1560         } else {
1561                 $mode = oct $mode;
1562         }
1563
1564         if (S_ISGITLINK($mode)) {
1565                 return "submodule";
1566         } elsif (S_ISDIR($mode & S_IFMT)) {
1567                 return "directory";
1568         } elsif (S_ISLNK($mode)) {
1569                 return "symlink";
1570         } elsif (S_ISREG($mode)) {
1571                 if ($mode & S_IXUSR) {
1572                         return "executable";
1573                 } else {
1574                         return "file";
1575                 };
1576         } else {
1577                 return "unknown";
1578         }
1579 }
1580
1581
1582 ## ----------------------------------------------------------------------
1583 ## functions returning short HTML fragments, or transforming HTML fragments
1584 ## which don't belong to other sections
1585
1586 # format line of commit message.
1587 sub format_log_line_html {
1588         my $line = shift;
1589
1590         $line = esc_html($line, -nbsp=>1);
1591         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1592                 $cgi->a({-href => href(action=>"object", hash=>$1),
1593                                         -class => "text"}, $1);
1594         }eg;
1595
1596         return $line;
1597 }
1598
1599 # format marker of refs pointing to given object
1600
1601 # the destination action is chosen based on object type and current context:
1602 # - for annotated tags, we choose the tag view unless it's the current view
1603 #   already, in which case we go to shortlog view
1604 # - for other refs, we keep the current view if we're in history, shortlog or
1605 #   log view, and select shortlog otherwise
1606 sub format_ref_marker {
1607         my ($refs, $id) = @_;
1608         my $markers = '';
1609
1610         if (defined $refs->{$id}) {
1611                 foreach my $ref (@{$refs->{$id}}) {
1612                         # this code exploits the fact that non-lightweight tags are the
1613                         # only indirect objects, and that they are the only objects for which
1614                         # we want to use tag instead of shortlog as action
1615                         my ($type, $name) = qw();
1616                         my $indirect = ($ref =~ s/\^\{\}$//);
1617                         # e.g. tags/v2.6.11 or heads/next
1618                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1619                                 $type = $1;
1620                                 $name = $2;
1621                         } else {
1622                                 $type = "ref";
1623                                 $name = $ref;
1624                         }
1625
1626                         my $class = $type;
1627                         $class .= " indirect" if $indirect;
1628
1629                         my $dest_action = "shortlog";
1630
1631                         if ($indirect) {
1632                                 $dest_action = "tag" unless $action eq "tag";
1633                         } elsif ($action =~ /^(history|(short)?log)$/) {
1634                                 $dest_action = $action;
1635                         }
1636
1637                         my $dest = "";
1638                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1639                         $dest .= $ref;
1640
1641                         my $link = $cgi->a({
1642                                 -href => href(
1643                                         action=>$dest_action,
1644                                         hash=>$dest
1645                                 )}, $name);
1646
1647                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1648                                 $link . "</span>";
1649                 }
1650         }
1651
1652         if ($markers) {
1653                 return ' <span class="refs">'. $markers . '</span>';
1654         } else {
1655                 return "";
1656         }
1657 }
1658
1659 # format, perhaps shortened and with markers, title line
1660 sub format_subject_html {
1661         my ($long, $short, $href, $extra) = @_;
1662         $extra = '' unless defined($extra);
1663
1664         if (length($short) < length($long)) {
1665                 $long =~ s/[[:cntrl:]]/?/g;
1666                 return $cgi->a({-href => $href, -class => "list subject",
1667                                 -title => to_utf8($long)},
1668                        esc_html($short)) . $extra;
1669         } else {
1670                 return $cgi->a({-href => $href, -class => "list subject"},
1671                        esc_html($long)) . $extra;
1672         }
1673 }
1674
1675 # Rather than recomputing the url for an email multiple times, we cache it
1676 # after the first hit. This gives a visible benefit in views where the avatar
1677 # for the same email is used repeatedly (e.g. shortlog).
1678 # The cache is shared by all avatar engines (currently gravatar only), which
1679 # are free to use it as preferred. Since only one avatar engine is used for any
1680 # given page, there's no risk for cache conflicts.
1681 our %avatar_cache = ();
1682
1683 # Compute the picon url for a given email, by using the picon search service over at
1684 # http://www.cs.indiana.edu/picons/search.html
1685 sub picon_url {
1686         my $email = lc shift;
1687         if (!$avatar_cache{$email}) {
1688                 my ($user, $domain) = split('@', $email);
1689                 $avatar_cache{$email} =
1690                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1691                         "$domain/$user/" .
1692                         "users+domains+unknown/up/single";
1693         }
1694         return $avatar_cache{$email};
1695 }
1696
1697 # Compute the gravatar url for a given email, if it's not in the cache already.
1698 # Gravatar stores only the part of the URL before the size, since that's the
1699 # one computationally more expensive. This also allows reuse of the cache for
1700 # different sizes (for this particular engine).
1701 sub gravatar_url {
1702         my $email = lc shift;
1703         my $size = shift;
1704         $avatar_cache{$email} ||=
1705                 "http://www.gravatar.com/avatar/" .
1706                         Digest::MD5::md5_hex($email) . "?s=";
1707         return $avatar_cache{$email} . $size;
1708 }
1709
1710 # Insert an avatar for the given $email at the given $size if the feature
1711 # is enabled.
1712 sub git_get_avatar {
1713         my ($email, %opts) = @_;
1714         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1715         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1716         $opts{-size} ||= 'default';
1717         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1718         my $url = "";
1719         if ($git_avatar eq 'gravatar') {
1720                 $url = gravatar_url($email, $size);
1721         } elsif ($git_avatar eq 'picon') {
1722                 $url = picon_url($email);
1723         }
1724         # Other providers can be added by extending the if chain, defining $url
1725         # as needed. If no variant puts something in $url, we assume avatars
1726         # are completely disabled/unavailable.
1727         if ($url) {
1728                 return $pre_white .
1729                        "<img width=\"$size\" " .
1730                             "class=\"avatar\" " .
1731                             "src=\"$url\" " .
1732                             "alt=\"\" " .
1733                        "/>" . $post_white;
1734         } else {
1735                 return "";
1736         }
1737 }
1738
1739 sub format_search_author {
1740         my ($author, $searchtype, $displaytext) = @_;
1741         my $have_search = gitweb_check_feature('search');
1742
1743         if ($have_search) {
1744                 my $performed = "";
1745                 if ($searchtype eq 'author') {
1746                         $performed = "authored";
1747                 } elsif ($searchtype eq 'committer') {
1748                         $performed = "committed";
1749                 }
1750
1751                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1752                                 searchtext=>$author,
1753                                 searchtype=>$searchtype), class=>"list",
1754                                 title=>"Search for commits $performed by $author"},
1755                                 $displaytext);
1756
1757         } else {
1758                 return $displaytext;
1759         }
1760 }
1761
1762 # format the author name of the given commit with the given tag
1763 # the author name is chopped and escaped according to the other
1764 # optional parameters (see chop_str).
1765 sub format_author_html {
1766         my $tag = shift;
1767         my $co = shift;
1768         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1769         return "<$tag class=\"author\">" .
1770                format_search_author($co->{'author_name'}, "author",
1771                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1772                        $author) .
1773                "</$tag>";
1774 }
1775
1776 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1777 sub format_git_diff_header_line {
1778         my $line = shift;
1779         my $diffinfo = shift;
1780         my ($from, $to) = @_;
1781
1782         if ($diffinfo->{'nparents'}) {
1783                 # combined diff
1784                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1785                 if ($to->{'href'}) {
1786                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1787                                          esc_path($to->{'file'}));
1788                 } else { # file was deleted (no href)
1789                         $line .= esc_path($to->{'file'});
1790                 }
1791         } else {
1792                 # "ordinary" diff
1793                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1794                 if ($from->{'href'}) {
1795                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1796                                          'a/' . esc_path($from->{'file'}));
1797                 } else { # file was added (no href)
1798                         $line .= 'a/' . esc_path($from->{'file'});
1799                 }
1800                 $line .= ' ';
1801                 if ($to->{'href'}) {
1802                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1803                                          'b/' . esc_path($to->{'file'}));
1804                 } else { # file was deleted
1805                         $line .= 'b/' . esc_path($to->{'file'});
1806                 }
1807         }
1808
1809         return "<div class=\"diff header\">$line</div>\n";
1810 }
1811
1812 # format extended diff header line, before patch itself
1813 sub format_extended_diff_header_line {
1814         my $line = shift;
1815         my $diffinfo = shift;
1816         my ($from, $to) = @_;
1817
1818         # match <path>
1819         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1820                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1821                                        esc_path($from->{'file'}));
1822         }
1823         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1824                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1825                                  esc_path($to->{'file'}));
1826         }
1827         # match single <mode>
1828         if ($line =~ m/\s(\d{6})$/) {
1829                 $line .= '<span class="info"> (' .
1830                          file_type_long($1) .
1831                          ')</span>';
1832         }
1833         # match <hash>
1834         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1835                 # can match only for combined diff
1836                 $line = 'index ';
1837                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1838                         if ($from->{'href'}[$i]) {
1839                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1840                                                   -class=>"hash"},
1841                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1842                         } else {
1843                                 $line .= '0' x 7;
1844                         }
1845                         # separator
1846                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1847                 }
1848                 $line .= '..';
1849                 if ($to->{'href'}) {
1850                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1851                                          substr($diffinfo->{'to_id'},0,7));
1852                 } else {
1853                         $line .= '0' x 7;
1854                 }
1855
1856         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1857                 # can match only for ordinary diff
1858                 my ($from_link, $to_link);
1859                 if ($from->{'href'}) {
1860                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1861                                              substr($diffinfo->{'from_id'},0,7));
1862                 } else {
1863                         $from_link = '0' x 7;
1864                 }
1865                 if ($to->{'href'}) {
1866                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1867                                            substr($diffinfo->{'to_id'},0,7));
1868                 } else {
1869                         $to_link = '0' x 7;
1870                 }
1871                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1872                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1873         }
1874
1875         return $line . "<br/>\n";
1876 }
1877
1878 # format from-file/to-file diff header
1879 sub format_diff_from_to_header {
1880         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1881         my $line;
1882         my $result = '';
1883
1884         $line = $from_line;
1885         #assert($line =~ m/^---/) if DEBUG;
1886         # no extra formatting for "^--- /dev/null"
1887         if (! $diffinfo->{'nparents'}) {
1888                 # ordinary (single parent) diff
1889                 if ($line =~ m!^--- "?a/!) {
1890                         if ($from->{'href'}) {
1891                                 $line = '--- a/' .
1892                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1893                                                 esc_path($from->{'file'}));
1894                         } else {
1895                                 $line = '--- a/' .
1896                                         esc_path($from->{'file'});
1897                         }
1898                 }
1899                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1900
1901         } else {
1902                 # combined diff (merge commit)
1903                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1904                         if ($from->{'href'}[$i]) {
1905                                 $line = '--- ' .
1906                                         $cgi->a({-href=>href(action=>"blobdiff",
1907                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1908                                                              hash_parent_base=>$parents[$i],
1909                                                              file_parent=>$from->{'file'}[$i],
1910                                                              hash=>$diffinfo->{'to_id'},
1911                                                              hash_base=>$hash,
1912                                                              file_name=>$to->{'file'}),
1913                                                  -class=>"path",
1914                                                  -title=>"diff" . ($i+1)},
1915                                                 $i+1) .
1916                                         '/' .
1917                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1918                                                 esc_path($from->{'file'}[$i]));
1919                         } else {
1920                                 $line = '--- /dev/null';
1921                         }
1922                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1923                 }
1924         }
1925
1926         $line = $to_line;
1927         #assert($line =~ m/^\+\+\+/) if DEBUG;
1928         # no extra formatting for "^+++ /dev/null"
1929         if ($line =~ m!^\+\+\+ "?b/!) {
1930                 if ($to->{'href'}) {
1931                         $line = '+++ b/' .
1932                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1933                                         esc_path($to->{'file'}));
1934                 } else {
1935                         $line = '+++ b/' .
1936                                 esc_path($to->{'file'});
1937                 }
1938         }
1939         $result .= qq!<div class="diff to_file">$line</div>\n!;
1940
1941         return $result;
1942 }
1943
1944 # create note for patch simplified by combined diff
1945 sub format_diff_cc_simplified {
1946         my ($diffinfo, @parents) = @_;
1947         my $result = '';
1948
1949         $result .= "<div class=\"diff header\">" .
1950                    "diff --cc ";
1951         if (!is_deleted($diffinfo)) {
1952                 $result .= $cgi->a({-href => href(action=>"blob",
1953                                                   hash_base=>$hash,
1954                                                   hash=>$diffinfo->{'to_id'},
1955                                                   file_name=>$diffinfo->{'to_file'}),
1956                                     -class => "path"},
1957                                    esc_path($diffinfo->{'to_file'}));
1958         } else {
1959                 $result .= esc_path($diffinfo->{'to_file'});
1960         }
1961         $result .= "</div>\n" . # class="diff header"
1962                    "<div class=\"diff nodifferences\">" .
1963                    "Simple merge" .
1964                    "</div>\n"; # class="diff nodifferences"
1965
1966         return $result;
1967 }
1968
1969 # format patch (diff) line (not to be used for diff headers)
1970 sub format_diff_line {
1971         my $line = shift;
1972         my ($from, $to) = @_;
1973         my $diff_class = "";
1974
1975         chomp $line;
1976
1977         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1978                 # combined diff
1979                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1980                 if ($line =~ m/^\@{3}/) {
1981                         $diff_class = " chunk_header";
1982                 } elsif ($line =~ m/^\\/) {
1983                         $diff_class = " incomplete";
1984                 } elsif ($prefix =~ tr/+/+/) {
1985                         $diff_class = " add";
1986                 } elsif ($prefix =~ tr/-/-/) {
1987                         $diff_class = " rem";
1988                 }
1989         } else {
1990                 # assume ordinary diff
1991                 my $char = substr($line, 0, 1);
1992                 if ($char eq '+') {
1993                         $diff_class = " add";
1994                 } elsif ($char eq '-') {
1995                         $diff_class = " rem";
1996                 } elsif ($char eq '@') {
1997                         $diff_class = " chunk_header";
1998                 } elsif ($char eq "\\") {
1999                         $diff_class = " incomplete";
2000                 }
2001         }
2002         $line = untabify($line);
2003         if ($from && $to && $line =~ m/^\@{2} /) {
2004                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2005                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2006
2007                 $from_lines = 0 unless defined $from_lines;
2008                 $to_lines   = 0 unless defined $to_lines;
2009
2010                 if ($from->{'href'}) {
2011                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2012                                              -class=>"list"}, $from_text);
2013                 }
2014                 if ($to->{'href'}) {
2015                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2016                                              -class=>"list"}, $to_text);
2017                 }
2018                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2019                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2020                 return "<div class=\"diff$diff_class\">$line</div>\n";
2021         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2022                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2023                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2024
2025                 @from_text = split(' ', $ranges);
2026                 for (my $i = 0; $i < @from_text; ++$i) {
2027                         ($from_start[$i], $from_nlines[$i]) =
2028                                 (split(',', substr($from_text[$i], 1)), 0);
2029                 }
2030
2031                 $to_text   = pop @from_text;
2032                 $to_start  = pop @from_start;
2033                 $to_nlines = pop @from_nlines;
2034
2035                 $line = "<span class=\"chunk_info\">$prefix ";
2036                 for (my $i = 0; $i < @from_text; ++$i) {
2037                         if ($from->{'href'}[$i]) {
2038                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2039                                                   -class=>"list"}, $from_text[$i]);
2040                         } else {
2041                                 $line .= $from_text[$i];
2042                         }
2043                         $line .= " ";
2044                 }
2045                 if ($to->{'href'}) {
2046                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2047                                           -class=>"list"}, $to_text);
2048                 } else {
2049                         $line .= $to_text;
2050                 }
2051                 $line .= " $prefix</span>" .
2052                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2053                 return "<div class=\"diff$diff_class\">$line</div>\n";
2054         }
2055         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2056 }
2057
2058 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2059 # linked.  Pass the hash of the tree/commit to snapshot.
2060 sub format_snapshot_links {
2061         my ($hash) = @_;
2062         my $num_fmts = @snapshot_fmts;
2063         if ($num_fmts > 1) {
2064                 # A parenthesized list of links bearing format names.
2065                 # e.g. "snapshot (_tar.gz_ _zip_)"
2066                 return "snapshot (" . join(' ', map
2067                         $cgi->a({
2068                                 -href => href(
2069                                         action=>"snapshot",
2070                                         hash=>$hash,
2071                                         snapshot_format=>$_
2072                                 )
2073                         }, $known_snapshot_formats{$_}{'display'})
2074                 , @snapshot_fmts) . ")";
2075         } elsif ($num_fmts == 1) {
2076                 # A single "snapshot" link whose tooltip bears the format name.
2077                 # i.e. "_snapshot_"
2078                 my ($fmt) = @snapshot_fmts;
2079                 return
2080                         $cgi->a({
2081                                 -href => href(
2082                                         action=>"snapshot",
2083                                         hash=>$hash,
2084                                         snapshot_format=>$fmt
2085                                 ),
2086                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2087                         }, "snapshot");
2088         } else { # $num_fmts == 0
2089                 return undef;
2090         }
2091 }
2092
2093 ## ......................................................................
2094 ## functions returning values to be passed, perhaps after some
2095 ## transformation, to other functions; e.g. returning arguments to href()
2096
2097 # returns hash to be passed to href to generate gitweb URL
2098 # in -title key it returns description of link
2099 sub get_feed_info {
2100         my $format = shift || 'Atom';
2101         my %res = (action => lc($format));
2102
2103         # feed links are possible only for project views
2104         return unless (defined $project);
2105         # some views should link to OPML, or to generic project feed,
2106         # or don't have specific feed yet (so they should use generic)
2107         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2108
2109         my $branch;
2110         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2111         # from tag links; this also makes possible to detect branch links
2112         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2113             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2114                 $branch = $1;
2115         }
2116         # find log type for feed description (title)
2117         my $type = 'log';
2118         if (defined $file_name) {
2119                 $type  = "history of $file_name";
2120                 $type .= "/" if ($action eq 'tree');
2121                 $type .= " on '$branch'" if (defined $branch);
2122         } else {
2123                 $type = "log of $branch" if (defined $branch);
2124         }
2125
2126         $res{-title} = $type;
2127         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2128         $res{'file_name'} = $file_name;
2129
2130         return %res;
2131 }
2132
2133 ## ----------------------------------------------------------------------
2134 ## git utility subroutines, invoking git commands
2135
2136 # returns path to the core git executable and the --git-dir parameter as list
2137 sub git_cmd {
2138         $number_of_git_cmds++;
2139         return $GIT, '--git-dir='.$git_dir;
2140 }
2141
2142 # quote the given arguments for passing them to the shell
2143 # quote_command("command", "arg 1", "arg with ' and ! characters")
2144 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2145 # Try to avoid using this function wherever possible.
2146 sub quote_command {
2147         return join(' ',
2148                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2149 }
2150
2151 # get HEAD ref of given project as hash
2152 sub git_get_head_hash {
2153         return git_get_full_hash(shift, 'HEAD');
2154 }
2155
2156 sub git_get_full_hash {
2157         return git_get_hash(@_);
2158 }
2159
2160 sub git_get_short_hash {
2161         return git_get_hash(@_, '--short=7');
2162 }
2163
2164 sub git_get_hash {
2165         my ($project, $hash, @options) = @_;
2166         my $o_git_dir = $git_dir;
2167         my $retval = undef;
2168         $git_dir = "$projectroot/$project";
2169         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2170             '--verify', '-q', @options, $hash) {
2171                 $retval = <$fd>;
2172                 chomp $retval if defined $retval;
2173                 close $fd;
2174         }
2175         if (defined $o_git_dir) {
2176                 $git_dir = $o_git_dir;
2177         }
2178         return $retval;
2179 }
2180
2181 # get type of given object
2182 sub git_get_type {
2183         my $hash = shift;
2184
2185         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2186         my $type = <$fd>;
2187         close $fd or return;
2188         chomp $type;
2189         return $type;
2190 }
2191
2192 # repository configuration
2193 our $config_file = '';
2194 our %config;
2195
2196 # store multiple values for single key as anonymous array reference
2197 # single values stored directly in the hash, not as [ <value> ]
2198 sub hash_set_multi {
2199         my ($hash, $key, $value) = @_;
2200
2201         if (!exists $hash->{$key}) {
2202                 $hash->{$key} = $value;
2203         } elsif (!ref $hash->{$key}) {
2204                 $hash->{$key} = [ $hash->{$key}, $value ];
2205         } else {
2206                 push @{$hash->{$key}}, $value;
2207         }
2208 }
2209
2210 # return hash of git project configuration
2211 # optionally limited to some section, e.g. 'gitweb'
2212 sub git_parse_project_config {
2213         my $section_regexp = shift;
2214         my %config;
2215
2216         local $/ = "\0";
2217
2218         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2219                 or return;
2220
2221         while (my $keyval = <$fh>) {
2222                 chomp $keyval;
2223                 my ($key, $value) = split(/\n/, $keyval, 2);
2224
2225                 hash_set_multi(\%config, $key, $value)
2226                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2227         }
2228         close $fh;
2229
2230         return %config;
2231 }
2232
2233 # convert config value to boolean: 'true' or 'false'
2234 # no value, number > 0, 'true' and 'yes' values are true
2235 # rest of values are treated as false (never as error)
2236 sub config_to_bool {
2237         my $val = shift;
2238
2239         return 1 if !defined $val;             # section.key
2240
2241         # strip leading and trailing whitespace
2242         $val =~ s/^\s+//;
2243         $val =~ s/\s+$//;
2244
2245         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2246                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2247 }
2248
2249 # convert config value to simple decimal number
2250 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2251 # to be multiplied by 1024, 1048576, or 1073741824
2252 sub config_to_int {
2253         my $val = shift;
2254
2255         # strip leading and trailing whitespace
2256         $val =~ s/^\s+//;
2257         $val =~ s/\s+$//;
2258
2259         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2260                 $unit = lc($unit);
2261                 # unknown unit is treated as 1
2262                 return $num * ($unit eq 'g' ? 1073741824 :
2263                                $unit eq 'm' ?    1048576 :
2264                                $unit eq 'k' ?       1024 : 1);
2265         }
2266         return $val;
2267 }
2268
2269 # convert config value to array reference, if needed
2270 sub config_to_multi {
2271         my $val = shift;
2272
2273         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2274 }
2275
2276 sub git_get_project_config {
2277         my ($key, $type) = @_;
2278
2279         # key sanity check
2280         return unless ($key);
2281         $key =~ s/^gitweb\.//;
2282         return if ($key =~ m/\W/);
2283
2284         # type sanity check
2285         if (defined $type) {
2286                 $type =~ s/^--//;
2287                 $type = undef
2288                         unless ($type eq 'bool' || $type eq 'int');
2289         }
2290
2291         # get config
2292         if (!defined $config_file ||
2293             $config_file ne "$git_dir/config") {
2294                 %config = git_parse_project_config('gitweb');
2295                 $config_file = "$git_dir/config";
2296         }
2297
2298         # check if config variable (key) exists
2299         return unless exists $config{"gitweb.$key"};
2300
2301         # ensure given type
2302         if (!defined $type) {
2303                 return $config{"gitweb.$key"};
2304         } elsif ($type eq 'bool') {
2305                 # backward compatibility: 'git config --bool' returns true/false
2306                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2307         } elsif ($type eq 'int') {
2308                 return config_to_int($config{"gitweb.$key"});
2309         }
2310         return $config{"gitweb.$key"};
2311 }
2312
2313 # get hash of given path at given ref
2314 sub git_get_hash_by_path {
2315         my $base = shift;
2316         my $path = shift || return undef;
2317         my $type = shift;
2318
2319         $path =~ s,/+$,,;
2320
2321         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2322                 or die_error(500, "Open git-ls-tree failed");
2323         my $line = <$fd>;
2324         close $fd or return undef;
2325
2326         if (!defined $line) {
2327                 # there is no tree or hash given by $path at $base
2328                 return undef;
2329         }
2330
2331         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2332         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2333         if (defined $type && $type ne $2) {
2334                 # type doesn't match
2335                 return undef;
2336         }
2337         return $3;
2338 }
2339
2340 # get path of entry with given hash at given tree-ish (ref)
2341 # used to get 'from' filename for combined diff (merge commit) for renames
2342 sub git_get_path_by_hash {
2343         my $base = shift || return;
2344         my $hash = shift || return;
2345
2346         local $/ = "\0";
2347
2348         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2349                 or return undef;
2350         while (my $line = <$fd>) {
2351                 chomp $line;
2352
2353                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2354                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2355                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2356                         close $fd;
2357                         return $1;
2358                 }
2359         }
2360         close $fd;
2361         return undef;
2362 }
2363
2364 ## ......................................................................
2365 ## git utility functions, directly accessing git repository
2366
2367 sub git_get_project_description {
2368         my $path = shift;
2369
2370         $git_dir = "$projectroot/$path";
2371         open my $fd, '<', "$git_dir/description"
2372                 or return git_get_project_config('description');
2373         my $descr = <$fd>;
2374         close $fd;
2375         if (defined $descr) {
2376                 chomp $descr;
2377         }
2378         return $descr;
2379 }
2380
2381 sub git_get_project_ctags {
2382         my $path = shift;
2383         my $ctags = {};
2384
2385         $git_dir = "$projectroot/$path";
2386         opendir my $dh, "$git_dir/ctags"
2387                 or return $ctags;
2388         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2389                 open my $ct, '<', $_ or next;
2390                 my $val = <$ct>;
2391                 chomp $val;
2392                 close $ct;
2393                 my $ctag = $_; $ctag =~ s#.*/##;
2394                 $ctags->{$ctag} = $val;
2395         }
2396         closedir $dh;
2397         $ctags;
2398 }
2399
2400 sub git_populate_project_tagcloud {
2401         my $ctags = shift;
2402
2403         # First, merge different-cased tags; tags vote on casing
2404         my %ctags_lc;
2405         foreach (keys %$ctags) {
2406                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2407                 if (not $ctags_lc{lc $_}->{topcount}
2408                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2409                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2410                         $ctags_lc{lc $_}->{topname} = $_;
2411                 }
2412         }
2413
2414         my $cloud;
2415         if (eval { require HTML::TagCloud; 1; }) {
2416                 $cloud = HTML::TagCloud->new;
2417                 foreach (sort keys %ctags_lc) {
2418                         # Pad the title with spaces so that the cloud looks
2419                         # less crammed.
2420                         my $title = $ctags_lc{$_}->{topname};
2421                         $title =~ s/ /&nbsp;/g;
2422                         $title =~ s/^/&nbsp;/g;
2423                         $title =~ s/$/&nbsp;/g;
2424                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2425                 }
2426         } else {
2427                 $cloud = \%ctags_lc;
2428         }
2429         $cloud;
2430 }
2431
2432 sub git_show_project_tagcloud {
2433         my ($cloud, $count) = @_;
2434         print STDERR ref($cloud)."..\n";
2435         if (ref $cloud eq 'HTML::TagCloud') {
2436                 return $cloud->html_and_css($count);
2437         } else {
2438                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2439                 return '<p align="center">' . join (', ', map {
2440                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2441                 } splice(@tags, 0, $count)) . '</p>';
2442         }
2443 }
2444
2445 sub git_get_project_url_list {
2446         my $path = shift;
2447
2448         $git_dir = "$projectroot/$path";
2449         open my $fd, '<', "$git_dir/cloneurl"
2450                 or return wantarray ?
2451                 @{ config_to_multi(git_get_project_config('url')) } :
2452                    config_to_multi(git_get_project_config('url'));
2453         my @git_project_url_list = map { chomp; $_ } <$fd>;
2454         close $fd;
2455
2456         return wantarray ? @git_project_url_list : \@git_project_url_list;
2457 }
2458
2459 sub git_get_projects_list {
2460         my ($filter) = @_;
2461         my @list;
2462
2463         $filter ||= '';
2464         $filter =~ s/\.git$//;
2465
2466         my $check_forks = gitweb_check_feature('forks');
2467
2468         if (-d $projects_list) {
2469                 # search in directory
2470                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2471                 # remove the trailing "/"
2472                 $dir =~ s!/+$!!;
2473                 my $pfxlen = length("$dir");
2474                 my $pfxdepth = ($dir =~ tr!/!!);
2475
2476                 File::Find::find({
2477                         follow_fast => 1, # follow symbolic links
2478                         follow_skip => 2, # ignore duplicates
2479                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2480                         wanted => sub {
2481                                 # skip project-list toplevel, if we get it.
2482                                 return if (m!^[/.]$!);
2483                                 # only directories can be git repositories
2484                                 return unless (-d $_);
2485                                 # don't traverse too deep (Find is super slow on os x)
2486                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2487                                         $File::Find::prune = 1;
2488                                         return;
2489                                 }
2490
2491                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2492                                 # we check related file in $projectroot
2493                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2494                                 if (check_export_ok("$projectroot/$path")) {
2495                                         push @list, { path => $path };
2496                                         $File::Find::prune = 1;
2497                                 }
2498                         },
2499                 }, "$dir");
2500
2501         } elsif (-f $projects_list) {
2502                 # read from file(url-encoded):
2503                 # 'git%2Fgit.git Linus+Torvalds'
2504                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2505                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2506                 my %paths;
2507                 open my $fd, '<', $projects_list or return;
2508         PROJECT:
2509                 while (my $line = <$fd>) {
2510                         chomp $line;
2511                         my ($path, $owner) = split ' ', $line;
2512                         $path = unescape($path);
2513                         $owner = unescape($owner);
2514                         if (!defined $path) {
2515                                 next;
2516                         }
2517                         if ($filter ne '') {
2518                                 # looking for forks;
2519                                 my $pfx = substr($path, 0, length($filter));
2520                                 if ($pfx ne $filter) {
2521                                         next PROJECT;
2522                                 }
2523                                 my $sfx = substr($path, length($filter));
2524                                 if ($sfx !~ /^\/.*\.git$/) {
2525                                         next PROJECT;
2526                                 }
2527                         } elsif ($check_forks) {
2528                         PATH:
2529                                 foreach my $filter (keys %paths) {
2530                                         # looking for forks;
2531                                         my $pfx = substr($path, 0, length($filter));
2532                                         if ($pfx ne $filter) {
2533                                                 next PATH;
2534                                         }
2535                                         my $sfx = substr($path, length($filter));
2536                                         if ($sfx !~ /^\/.*\.git$/) {
2537                                                 next PATH;
2538                                         }
2539                                         # is a fork, don't include it in
2540                                         # the list
2541                                         next PROJECT;
2542                                 }
2543                         }
2544                         if (check_export_ok("$projectroot/$path")) {
2545                                 my $pr = {
2546                                         path => $path,
2547                                         owner => to_utf8($owner),
2548                                 };
2549                                 push @list, $pr;
2550                                 (my $forks_path = $path) =~ s/\.git$//;
2551                                 $paths{$forks_path}++;
2552                         }
2553                 }
2554                 close $fd;
2555         }
2556         return @list;
2557 }
2558
2559 our $gitweb_project_owner = undef;
2560 sub git_get_project_list_from_file {
2561
2562         return if (defined $gitweb_project_owner);
2563
2564         $gitweb_project_owner = {};
2565         # read from file (url-encoded):
2566         # 'git%2Fgit.git Linus+Torvalds'
2567         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2568         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2569         if (-f $projects_list) {
2570                 open(my $fd, '<', $projects_list);
2571                 while (my $line = <$fd>) {
2572                         chomp $line;
2573                         my ($pr, $ow) = split ' ', $line;
2574                         $pr = unescape($pr);
2575                         $ow = unescape($ow);
2576                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2577                 }
2578                 close $fd;
2579         }
2580 }
2581
2582 sub git_get_project_owner {
2583         my $project = shift;
2584         my $owner;
2585
2586         return undef unless $project;
2587         $git_dir = "$projectroot/$project";
2588
2589         if (!defined $gitweb_project_owner) {
2590                 git_get_project_list_from_file();
2591         }
2592
2593         if (exists $gitweb_project_owner->{$project}) {
2594                 $owner = $gitweb_project_owner->{$project};
2595         }
2596         if (!defined $owner){
2597                 $owner = git_get_project_config('owner');
2598         }
2599         if (!defined $owner) {
2600                 $owner = get_file_owner("$git_dir");
2601         }
2602
2603         return $owner;
2604 }
2605
2606 sub git_get_last_activity {
2607         my ($path) = @_;
2608         my $fd;
2609
2610         $git_dir = "$projectroot/$path";
2611         open($fd, "-|", git_cmd(), 'for-each-ref',
2612              '--format=%(committer)',
2613              '--sort=-committerdate',
2614              '--count=1',
2615              'refs/heads') or return;
2616         my $most_recent = <$fd>;
2617         close $fd or return;
2618         if (defined $most_recent &&
2619             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2620                 my $timestamp = $1;
2621                 my $age = time - $timestamp;
2622                 return ($age, age_string($age));
2623         }
2624         return (undef, undef);
2625 }
2626
2627 sub git_get_references {
2628         my $type = shift || "";
2629         my %refs;
2630         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2631         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2632         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2633                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2634                 or return;
2635
2636         while (my $line = <$fd>) {
2637                 chomp $line;
2638                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2639                         if (defined $refs{$1}) {
2640                                 push @{$refs{$1}}, $2;
2641                         } else {
2642                                 $refs{$1} = [ $2 ];
2643                         }
2644                 }
2645         }
2646         close $fd or return;
2647         return \%refs;
2648 }
2649
2650 sub git_get_rev_name_tags {
2651         my $hash = shift || return undef;
2652
2653         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2654                 or return;
2655         my $name_rev = <$fd>;
2656         close $fd;
2657
2658         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2659                 return $1;
2660         } else {
2661                 # catches also '$hash undefined' output
2662                 return undef;
2663         }
2664 }
2665
2666 ## ----------------------------------------------------------------------
2667 ## parse to hash functions
2668
2669 sub parse_date {
2670         my $epoch = shift;
2671         my $tz = shift || "-0000";
2672
2673         my %date;
2674         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2675         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2676         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2677         $date{'hour'} = $hour;
2678         $date{'minute'} = $min;
2679         $date{'mday'} = $mday;
2680         $date{'day'} = $days[$wday];
2681         $date{'month'} = $months[$mon];
2682         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2683                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2684         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2685                              $mday, $months[$mon], $hour ,$min;
2686         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2687                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2688
2689         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2690         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2691         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2692         $date{'hour_local'} = $hour;
2693         $date{'minute_local'} = $min;
2694         $date{'tz_local'} = $tz;
2695         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2696                                   1900+$year, $mon+1, $mday,
2697                                   $hour, $min, $sec, $tz);
2698         return %date;
2699 }
2700
2701 sub parse_tag {
2702         my $tag_id = shift;
2703         my %tag;
2704         my @comment;
2705
2706         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2707         $tag{'id'} = $tag_id;
2708         while (my $line = <$fd>) {
2709                 chomp $line;
2710                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2711                         $tag{'object'} = $1;
2712                 } elsif ($line =~ m/^type (.+)$/) {
2713                         $tag{'type'} = $1;
2714                 } elsif ($line =~ m/^tag (.+)$/) {
2715                         $tag{'name'} = $1;
2716                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2717                         $tag{'author'} = $1;
2718                         $tag{'author_epoch'} = $2;
2719                         $tag{'author_tz'} = $3;
2720                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2721                                 $tag{'author_name'}  = $1;
2722                                 $tag{'author_email'} = $2;
2723                         } else {
2724                                 $tag{'author_name'} = $tag{'author'};
2725                         }
2726                 } elsif ($line =~ m/--BEGIN/) {
2727                         push @comment, $line;
2728                         last;
2729                 } elsif ($line eq "") {
2730                         last;
2731                 }
2732         }
2733         push @comment, <$fd>;
2734         $tag{'comment'} = \@comment;
2735         close $fd or return;
2736         if (!defined $tag{'name'}) {
2737                 return
2738         };
2739         return %tag
2740 }
2741
2742 sub parse_commit_text {
2743         my ($commit_text, $withparents) = @_;
2744         my @commit_lines = split '\n', $commit_text;
2745         my %co;
2746
2747         pop @commit_lines; # Remove '\0'
2748
2749         if (! @commit_lines) {
2750                 return;
2751         }
2752
2753         my $header = shift @commit_lines;
2754         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2755                 return;
2756         }
2757         ($co{'id'}, my @parents) = split ' ', $header;
2758         while (my $line = shift @commit_lines) {
2759                 last if $line eq "\n";
2760                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2761                         $co{'tree'} = $1;
2762                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2763                         push @parents, $1;
2764                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2765                         $co{'author'} = to_utf8($1);
2766                         $co{'author_epoch'} = $2;
2767                         $co{'author_tz'} = $3;
2768                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2769                                 $co{'author_name'}  = $1;
2770                                 $co{'author_email'} = $2;
2771                         } else {
2772                                 $co{'author_name'} = $co{'author'};
2773                         }
2774                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2775                         $co{'committer'} = to_utf8($1);
2776                         $co{'committer_epoch'} = $2;
2777                         $co{'committer_tz'} = $3;
2778                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2779                                 $co{'committer_name'}  = $1;
2780                                 $co{'committer_email'} = $2;
2781                         } else {
2782                                 $co{'committer_name'} = $co{'committer'};
2783                         }
2784                 }
2785         }
2786         if (!defined $co{'tree'}) {
2787                 return;
2788         };
2789         $co{'parents'} = \@parents;
2790         $co{'parent'} = $parents[0];
2791
2792         foreach my $title (@commit_lines) {
2793                 $title =~ s/^    //;
2794                 if ($title ne "") {
2795                         $co{'title'} = chop_str($title, 80, 5);
2796                         # remove leading stuff of merges to make the interesting part visible
2797                         if (length($title) > 50) {
2798                                 $title =~ s/^Automatic //;
2799                                 $title =~ s/^merge (of|with) /Merge ... /i;
2800                                 if (length($title) > 50) {
2801                                         $title =~ s/(http|rsync):\/\///;
2802                                 }
2803                                 if (length($title) > 50) {
2804                                         $title =~ s/(master|www|rsync)\.//;
2805                                 }
2806                                 if (length($title) > 50) {
2807                                         $title =~ s/kernel.org:?//;
2808                                 }
2809                                 if (length($title) > 50) {
2810                                         $title =~ s/\/pub\/scm//;
2811                                 }
2812                         }
2813                         $co{'title_short'} = chop_str($title, 50, 5);
2814                         last;
2815                 }
2816         }
2817         if (! defined $co{'title'} || $co{'title'} eq "") {
2818                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2819         }
2820         # remove added spaces
2821         foreach my $line (@commit_lines) {
2822                 $line =~ s/^    //;
2823         }
2824         $co{'comment'} = \@commit_lines;
2825
2826         my $age = time - $co{'committer_epoch'};
2827         $co{'age'} = $age;
2828         $co{'age_string'} = age_string($age);
2829         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2830         if ($age > 60*60*24*7*2) {
2831                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2832                 $co{'age_string_age'} = $co{'age_string'};
2833         } else {
2834                 $co{'age_string_date'} = $co{'age_string'};
2835                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2836         }
2837         return %co;
2838 }
2839
2840 sub parse_commit {
2841         my ($commit_id) = @_;
2842         my %co;
2843
2844         local $/ = "\0";
2845
2846         open my $fd, "-|", git_cmd(), "rev-list",
2847                 "--parents",
2848                 "--header",
2849                 "--max-count=1",
2850                 $commit_id,
2851                 "--",
2852                 or die_error(500, "Open git-rev-list failed");
2853         %co = parse_commit_text(<$fd>, 1);
2854         close $fd;
2855
2856         return %co;
2857 }
2858
2859 sub parse_commits {
2860         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2861         my @cos;
2862
2863         $maxcount ||= 1;
2864         $skip ||= 0;
2865
2866         local $/ = "\0";
2867
2868         open my $fd, "-|", git_cmd(), "rev-list",
2869                 "--header",
2870                 @args,
2871                 ("--max-count=" . $maxcount),
2872                 ("--skip=" . $skip),
2873                 @extra_options,
2874                 $commit_id,
2875                 "--",
2876                 ($filename ? ($filename) : ())
2877                 or die_error(500, "Open git-rev-list failed");
2878         while (my $line = <$fd>) {
2879                 my %co = parse_commit_text($line);
2880                 push @cos, \%co;
2881         }
2882         close $fd;
2883
2884         return wantarray ? @cos : \@cos;
2885 }
2886
2887 # parse line of git-diff-tree "raw" output
2888 sub parse_difftree_raw_line {
2889         my $line = shift;
2890         my %res;
2891
2892         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2893         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2894         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2895                 $res{'from_mode'} = $1;
2896                 $res{'to_mode'} = $2;
2897                 $res{'from_id'} = $3;
2898                 $res{'to_id'} = $4;
2899                 $res{'status'} = $5;
2900                 $res{'similarity'} = $6;
2901                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2902                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2903                 } else {
2904                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2905                 }
2906         }
2907         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2908         # combined diff (for merge commit)
2909         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2910                 $res{'nparents'}  = length($1);
2911                 $res{'from_mode'} = [ split(' ', $2) ];
2912                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2913                 $res{'from_id'} = [ split(' ', $3) ];
2914                 $res{'to_id'} = pop @{$res{'from_id'}};
2915                 $res{'status'} = [ split('', $4) ];
2916                 $res{'to_file'} = unquote($5);
2917         }
2918         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2919         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2920                 $res{'commit'} = $1;
2921         }
2922
2923         return wantarray ? %res : \%res;
2924 }
2925
2926 # wrapper: return parsed line of git-diff-tree "raw" output
2927 # (the argument might be raw line, or parsed info)
2928 sub parsed_difftree_line {
2929         my $line_or_ref = shift;
2930
2931         if (ref($line_or_ref) eq "HASH") {
2932                 # pre-parsed (or generated by hand)
2933                 return $line_or_ref;
2934         } else {
2935                 return parse_difftree_raw_line($line_or_ref);
2936         }
2937 }
2938
2939 # parse line of git-ls-tree output
2940 sub parse_ls_tree_line {
2941         my $line = shift;
2942         my %opts = @_;
2943         my %res;
2944
2945         if ($opts{'-l'}) {
2946                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2947                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2948
2949                 $res{'mode'} = $1;
2950                 $res{'type'} = $2;
2951                 $res{'hash'} = $3;
2952                 $res{'size'} = $4;
2953                 if ($opts{'-z'}) {
2954                         $res{'name'} = $5;
2955                 } else {
2956                         $res{'name'} = unquote($5);
2957                 }
2958         } else {
2959                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2960                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2961
2962                 $res{'mode'} = $1;
2963                 $res{'type'} = $2;
2964                 $res{'hash'} = $3;
2965                 if ($opts{'-z'}) {
2966                         $res{'name'} = $4;
2967                 } else {
2968                         $res{'name'} = unquote($4);
2969                 }
2970         }
2971
2972         return wantarray ? %res : \%res;
2973 }
2974
2975 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2976 sub parse_from_to_diffinfo {
2977         my ($diffinfo, $from, $to, @parents) = @_;
2978
2979         if ($diffinfo->{'nparents'}) {
2980                 # combined diff
2981                 $from->{'file'} = [];
2982                 $from->{'href'} = [];
2983                 fill_from_file_info($diffinfo, @parents)
2984                         unless exists $diffinfo->{'from_file'};
2985                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2986                         $from->{'file'}[$i] =
2987                                 defined $diffinfo->{'from_file'}[$i] ?
2988                                         $diffinfo->{'from_file'}[$i] :
2989                                         $diffinfo->{'to_file'};
2990                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2991                                 $from->{'href'}[$i] = href(action=>"blob",
2992                                                            hash_base=>$parents[$i],
2993                                                            hash=>$diffinfo->{'from_id'}[$i],
2994                                                            file_name=>$from->{'file'}[$i]);
2995                         } else {
2996                                 $from->{'href'}[$i] = undef;
2997                         }
2998                 }
2999         } else {
3000                 # ordinary (not combined) diff
3001                 $from->{'file'} = $diffinfo->{'from_file'};
3002                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3003                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3004                                                hash=>$diffinfo->{'from_id'},
3005                                                file_name=>$from->{'file'});
3006                 } else {
3007                         delete $from->{'href'};
3008                 }
3009         }
3010
3011         $to->{'file'} = $diffinfo->{'to_file'};
3012         if (!is_deleted($diffinfo)) { # file exists in result
3013                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3014                                      hash=>$diffinfo->{'to_id'},
3015                                      file_name=>$to->{'file'});
3016         } else {
3017                 delete $to->{'href'};
3018         }
3019 }
3020
3021 ## ......................................................................
3022 ## parse to array of hashes functions
3023
3024 sub git_get_heads_list {
3025         my $limit = shift;
3026         my @headslist;
3027
3028         open my $fd, '-|', git_cmd(), 'for-each-ref',
3029                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3030                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3031                 'refs/heads'
3032                 or return;
3033         while (my $line = <$fd>) {
3034                 my %ref_item;
3035
3036                 chomp $line;
3037                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3038                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3039                 my ($committer, $epoch, $tz) =
3040                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3041                 $ref_item{'fullname'}  = $name;
3042                 $name =~ s!^refs/heads/!!;
3043
3044                 $ref_item{'name'}  = $name;
3045                 $ref_item{'id'}    = $hash;
3046                 $ref_item{'title'} = $title || '(no commit message)';
3047                 $ref_item{'epoch'} = $epoch;
3048                 if ($epoch) {
3049                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3050                 } else {
3051                         $ref_item{'age'} = "unknown";
3052                 }
3053
3054                 push @headslist, \%ref_item;
3055         }
3056         close $fd;
3057
3058         return wantarray ? @headslist : \@headslist;
3059 }
3060
3061 sub git_get_tags_list {
3062         my $limit = shift;
3063         my @tagslist;
3064
3065         open my $fd, '-|', git_cmd(), 'for-each-ref',
3066                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3067                 '--format=%(objectname) %(objecttype) %(refname) '.
3068                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3069                 'refs/tags'
3070                 or return;
3071         while (my $line = <$fd>) {
3072                 my %ref_item;
3073
3074                 chomp $line;
3075                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3076                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3077                 my ($creator, $epoch, $tz) =
3078                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3079                 $ref_item{'fullname'} = $name;
3080                 $name =~ s!^refs/tags/!!;
3081
3082                 $ref_item{'type'} = $type;
3083                 $ref_item{'id'} = $id;
3084                 $ref_item{'name'} = $name;
3085                 if ($type eq "tag") {
3086                         $ref_item{'subject'} = $title;
3087                         $ref_item{'reftype'} = $reftype;
3088                         $ref_item{'refid'}   = $refid;
3089                 } else {
3090                         $ref_item{'reftype'} = $type;
3091                         $ref_item{'refid'}   = $id;
3092                 }
3093
3094                 if ($type eq "tag" || $type eq "commit") {
3095                         $ref_item{'epoch'} = $epoch;
3096                         if ($epoch) {
3097                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3098                         } else {
3099                                 $ref_item{'age'} = "unknown";
3100                         }
3101                 }
3102
3103                 push @tagslist, \%ref_item;
3104         }
3105         close $fd;
3106
3107         return wantarray ? @tagslist : \@tagslist;
3108 }
3109
3110 ## ----------------------------------------------------------------------
3111 ## filesystem-related functions
3112
3113 sub get_file_owner {
3114         my $path = shift;
3115
3116         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3117         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3118         if (!defined $gcos) {
3119                 return undef;
3120         }
3121         my $owner = $gcos;
3122         $owner =~ s/[,;].*$//;
3123         return to_utf8($owner);
3124 }
3125
3126 # assume that file exists
3127 sub insert_file {
3128         my $filename = shift;
3129
3130         open my $fd, '<', $filename;
3131         print {$out} map { to_utf8($_) } <$fd>;
3132         close $fd;
3133 }
3134
3135 ## ......................................................................
3136 ## mimetype related functions
3137
3138 sub mimetype_guess_file {
3139         my $filename = shift;
3140         my $mimemap = shift;
3141         -r $mimemap or return undef;
3142
3143         my %mimemap;
3144         open(my $mh, '<', $mimemap) or return undef;
3145         while (<$mh>) {
3146                 next if m/^#/; # skip comments
3147                 my ($mimetype, $exts) = split(/\t+/);
3148                 if (defined $exts) {
3149                         my @exts = split(/\s+/, $exts);
3150                         foreach my $ext (@exts) {
3151                                 $mimemap{$ext} = $mimetype;
3152                         }
3153                 }
3154         }
3155         close($mh);
3156
3157         $filename =~ /\.([^.]*)$/;
3158         return $mimemap{$1};
3159 }
3160
3161 sub mimetype_guess {
3162         my $filename = shift;
3163         my $mime;
3164         $filename =~ /\./ or return undef;
3165
3166         if ($mimetypes_file) {
3167                 my $file = $mimetypes_file;
3168                 if ($file !~ m!^/!) { # if it is relative path
3169                         # it is relative to project
3170                         $file = "$projectroot/$project/$file";
3171                 }
3172                 $mime = mimetype_guess_file($filename, $file);
3173         }
3174         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3175         return $mime;
3176 }
3177
3178 sub blob_mimetype {
3179         my $fd = shift;
3180         my $filename = shift;
3181
3182         if ($filename) {
3183                 my $mime = mimetype_guess($filename);
3184                 $mime and return $mime;
3185         }
3186
3187         # just in case
3188         return $default_blob_plain_mimetype unless $fd;
3189
3190         if (-T $fd) {
3191                 return 'text/plain';
3192         } elsif (! $filename) {
3193                 return 'application/octet-stream';
3194         } elsif ($filename =~ m/\.png$/i) {
3195                 return 'image/png';
3196         } elsif ($filename =~ m/\.gif$/i) {
3197                 return 'image/gif';
3198         } elsif ($filename =~ m/\.jpe?g$/i) {
3199                 return 'image/jpeg';
3200         } else {
3201                 return 'application/octet-stream';
3202         }
3203 }
3204
3205 sub blob_contenttype {
3206         my ($fd, $file_name, $type) = @_;
3207
3208         $type ||= blob_mimetype($fd, $file_name);
3209         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3210                 $type .= "; charset=$default_text_plain_charset";
3211         }
3212
3213         return $type;
3214 }
3215
3216 ## ======================================================================
3217 ## functions printing HTML: header, footer, error page
3218
3219 sub git_generating_data_html {
3220         my ($cache, $key, $lock_fh) = @_;
3221
3222         if ($cgi->http('X-Ajax')) {
3223                 return;
3224         }
3225         if ($action eq 'atom' || $action eq 'rss' || $action eq 'opml' || # feeds
3226             $action eq 'blob_plain' || # unknown mimetype
3227             $action eq 'commitdiff_plain' || # text/plain
3228             $action eq 'patch' || $action eq 'patches' || # text/plain
3229             $action eq 'snapshot') { # binary
3230                 return;
3231         }
3232
3233         my $title = "[Generating...] $site_name";
3234         if (defined $project) {
3235                 $title .= " - " . to_utf8($project);
3236                 if (defined $action) {
3237                         $title .= "/$action";
3238                         if (defined $file_name) {
3239                                 $title .= " - " . esc_path($file_name);
3240                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3241                                         $title .= "/";
3242                                 }
3243                         }
3244                 }
3245         }
3246
3247         my $use_javascript = $cgi->param('js');
3248         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3249         print STDOUT $cgi->header(-type => 'text/html', -charset => 'utf-8',
3250                                   -status=> '200 OK', -expires => 'now');
3251         print STDOUT <<"EOF";
3252 <?xml version="1.0" encoding="utf-8"?>
3253 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
3254                       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3255 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3256 <!-- git web interface version $version -->
3257 <!-- git core binaries version $git_version -->
3258 <head>
3259 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
3260 EOF
3261         if (!$use_javascript) {
3262                 print STDOUT qq!<meta http-equiv="refresh" content="0" />\n!;
3263         }
3264         print STDOUT <<"EOF";
3265 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version" />
3266 <meta name="robots" content="noindex, nofollow" />
3267 <title>$title</title>
3268 </head>
3269 <body>
3270 EOF
3271         if ($use_javascript) {
3272                 my $url_self = href(-replay=>1);
3273                 print STDOUT <<"EOF";
3274 Generating...<br />
3275 <script type="text/javascript" src="$javascript"></script>
3276 <script type="text/javascript">
3277 window.onload = function () {
3278         xhr = createRequestObject();
3279         xhr.onreadystatechange = function () {
3280                 if (xhr.readyState === 4 && xhr.status === 200) {
3281                         // intentionally overwrite document
3282                         document.write(xhr.responseText);
3283                 }
3284         }
3285         xhr.open('GET', $url_self);
3286         // mark request to not show "Generating..." page
3287         xhr.setRequestHeader('X-Ajax', 'Yes');
3288         xhr.send(null);
3289 }
3290 </script>
3291 EOF
3292         } else {
3293                 print STDOUT 'Generating..';
3294
3295                 my $ready;
3296                 my ($wait, $wait_step, $wait_max); # in seconds
3297                 $wait = 0;
3298                 $wait_step = 2;
3299                 $wait_max = 20;
3300                 $| = 1; # autoflush
3301                 do {
3302                         print STDOUT '.';
3303
3304                         sleep $wait_step if ($wait > 0);
3305                         $wait += $wait_step;
3306
3307                         $ready = flock($lock_fh, LOCK_SH|LOCK_NB)
3308                                 if $lock_fh;
3309
3310                 } while (!$ready && ($wait < $wait_max));
3311         }
3312
3313         print STDOUT <<"EOF";
3314
3315 </body>
3316 </html>
3317 EOF
3318         #exit 0;
3319         return;
3320 }
3321
3322 sub git_header_html {
3323         my $status = shift || "200 OK";
3324         my $expires = shift;
3325
3326         my $title = "$site_name";
3327         if (defined $project) {
3328                 $title .= " - " . to_utf8($project);
3329                 if (defined $action) {
3330                         $title .= "/$action";
3331                         if (defined $file_name) {
3332                                 $title .= " - " . esc_path($file_name);
3333                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3334                                         $title .= "/";
3335                                 }
3336                         }
3337                 }
3338         }
3339         my $content_type;
3340         # require explicit support from the UA if we are to send the page as
3341         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3342         # we have to do this because MSIE sometimes globs '*/*', pretending to
3343         # support xhtml+xml but choking when it gets what it asked for.
3344         # Disable content-type negotiation when caching (use mimetype good for all).
3345         if (!$caching_enabled &&
3346             defined $cgi->http('HTTP_ACCEPT') &&
3347             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3348             $cgi->Accept('application/xhtml+xml') != 0) {
3349                 $content_type = 'application/xhtml+xml';
3350         } else {
3351                 $content_type = 'text/html';
3352         }
3353         print {$out} $cgi->header(-type=>$content_type, -charset => 'utf-8',
3354                                   -status=> $status, -expires => $expires);
3355         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3356         print {$out} <<EOF;
3357 <?xml version="1.0" encoding="utf-8"?>
3358 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3359 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3360 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3361 <!-- git core binaries version $git_version -->
3362 <head>
3363 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3364 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3365 <meta name="robots" content="index, nofollow"/>
3366 <title>$title</title>
3367 EOF
3368         # the stylesheet, favicon etc urls won't work correctly with path_info
3369         # unless we set the appropriate base URL
3370         if ($ENV{'PATH_INFO'}) {
3371                 print {$out} '<base href="'.esc_url($base_url).'" />'."\n";
3372         }
3373         # print out each stylesheet that exist, providing backwards capability
3374         # for those people who defined $stylesheet in a config file
3375         if (defined $stylesheet) {
3376                 print {$out} '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3377         } else {
3378                 foreach my $stylesheet (@stylesheets) {
3379                         next unless $stylesheet;
3380                         print {$out} '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3381                 }
3382         }
3383         if (defined $project) {
3384                 my %href_params = get_feed_info();
3385                 if (!exists $href_params{'-title'}) {
3386                         $href_params{'-title'} = 'log';
3387                 }
3388
3389                 foreach my $format qw(RSS Atom) {
3390                         my $type = lc($format);
3391                         my %link_attr = (
3392                                 '-rel' => 'alternate',
3393                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3394                                 '-type' => "application/$type+xml"
3395                         );
3396
3397                         $href_params{'action'} = $type;
3398                         $link_attr{'-href'} = href(%href_params);
3399                         print {$out} "<link ".
3400                                      "rel=\"$link_attr{'-rel'}\" ".
3401                                      "title=\"$link_attr{'-title'}\" ".
3402                                      "href=\"$link_attr{'-href'}\" ".
3403                                      "type=\"$link_attr{'-type'}\" ".
3404                                      "/>\n";
3405
3406                         $href_params{'extra_options'} = '--no-merges';
3407                         $link_attr{'-href'} = href(%href_params);
3408                         $link_attr{'-title'} .= ' (no merges)';
3409                         print {$out} "<link ".
3410                                      "rel=\"$link_attr{'-rel'}\" ".
3411                                      "title=\"$link_attr{'-title'}\" ".
3412                                      "href=\"$link_attr{'-href'}\" ".
3413                                      "type=\"$link_attr{'-type'}\" ".
3414                                      "/>\n";
3415                 }
3416
3417         } else {
3418                 printf {$out} '<link rel="alternate" title="%s projects list" '.
3419                               'href="%s" type="text/plain; charset=utf-8" />'."\n",
3420                               $site_name, href(project=>undef, action=>"project_index");
3421                 printf {$out} '<link rel="alternate" title="%s projects feeds" '.
3422                               'href="%s" type="text/x-opml" />'."\n",
3423                               $site_name, href(project=>undef, action=>"opml");
3424         }
3425         if (defined $favicon) {
3426                 print {$out} qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3427         }
3428
3429         print {$out} "</head>\n" .
3430                      "<body>\n";
3431
3432         if (-f $site_header) {
3433                 insert_file($site_header);
3434         }
3435
3436         print {$out} "<div class=\"page_header\">\n" .
3437                      $cgi->a({-href => esc_url($logo_url),
3438                               -title => $logo_label},
3439                              qq(<img src="$logo" width="72" height="27" alt="git" class="logo" />));
3440         print {$out} $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3441         if (defined $project) {
3442                 print {$out} $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3443                 if (defined $action) {
3444                         print {$out} " / $action";
3445                 }
3446                 print {$out} "\n";
3447         }
3448         print {$out} "</div>\n";
3449
3450         my $have_search = gitweb_check_feature('search');
3451         if (defined $project && $have_search) {
3452                 if (!defined $searchtext) {
3453                         $searchtext = "";
3454                 }
3455                 my $search_hash;
3456                 if (defined $hash_base) {
3457                         $search_hash = $hash_base;
3458                 } elsif (defined $hash) {
3459                         $search_hash = $hash;
3460                 } else {
3461                         $search_hash = "HEAD";
3462                 }
3463                 my $action = $my_uri;
3464                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3465                 if ($use_pathinfo) {
3466                         $action .= "/".esc_url($project);
3467                 }
3468                 print {$out} $cgi->startform(-method => "get", -action => $action) .
3469                              "<div class=\"search\">\n" .
3470                              (!$use_pathinfo &&
3471                              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3472                              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3473                              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3474                              $cgi->popup_menu(-name => 'st', -default => 'commit',
3475                                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3476                              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3477                              " search:\n",
3478                              $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3479                              "<span title=\"Extended regular expression\">" .
3480                              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3481                                             -checked => $search_use_regexp) .
3482                              "</span>" .
3483                              "</div>" .
3484                              $cgi->end_form() . "\n";
3485         }
3486 }
3487
3488 sub git_footer_html {
3489         my $feed_class = 'rss_logo';
3490
3491         print {$out} "<div class=\"page_footer\">\n";
3492         if (defined $project) {
3493                 my $descr = git_get_project_description($project);
3494                 if (defined $descr) {
3495                         print {$out} "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3496                 }
3497
3498                 my %href_params = get_feed_info();
3499                 if (!%href_params) {
3500                         $feed_class .= ' generic';
3501                 }
3502                 $href_params{'-title'} ||= 'log';
3503
3504                 foreach my $format qw(RSS Atom) {
3505                         $href_params{'action'} = lc($format);
3506                         print {$out} $cgi->a({-href => href(%href_params),
3507                                              -title => "$href_params{'-title'} $format feed",
3508                                              -class => $feed_class}, $format)."\n";
3509                 }
3510
3511         } else {
3512                 print {$out} $cgi->a({-href => href(project=>undef, action=>"opml"),
3513                                      -class => $feed_class}, "OPML") . " ";
3514                 print {$out} $cgi->a({-href => href(project=>undef, action=>"project_index"),
3515                                      -class => $feed_class}, "TXT") . "\n";
3516         }
3517         print {$out} "</div>\n"; # class="page_footer"
3518
3519         # timing info doesn't make much sense with output (response) caching
3520         if (!$caching_enabled &&
3521             defined $t0 && gitweb_check_feature('timed')) {
3522                 print {$out} "<div id=\"generating_info\">\n";
3523                 print {$out} 'This page took '.
3524                              '<span id="generating_time" class="time_span">'.
3525                              Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3526                              ' seconds </span>'.
3527                              ' and '.
3528                              '<span id="generating_cmd">'.
3529                              $number_of_git_cmds.
3530                              '</span> git commands '.
3531                              " to generate.\n";
3532                 print {$out} "</div>\n"; # class="page_footer"
3533         }
3534
3535         if (-f $site_footer) {
3536                 insert_file($site_footer);
3537         }
3538
3539         print {$out} qq!<script type="text/javascript" src="$javascript"></script>\n!;
3540         if (defined $action &&
3541             $action eq 'blame_incremental') {
3542                 print {$out} qq!<script type="text/javascript">\n!.
3543                              qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3544                              qq!           "!. href() .qq!");\n!.
3545                              qq!</script>\n!;
3546         } elsif (gitweb_check_feature('javascript-actions')) {
3547                 print {$out} qq!<script type="text/javascript">\n!.
3548                              qq!window.onload = fixLinks;\n!.
3549                              qq!</script>\n!;
3550         }
3551
3552         print {$out} "</body>\n" .
3553                      "</html>";
3554 }
3555
3556 # die_error(<http_status_code>, <error_message>)
3557 # Example: die_error(404, 'Hash not found')
3558 # By convention, use the following status codes (as defined in RFC 2616):
3559 # 400: Invalid or missing CGI parameters, or
3560 #      requested object exists but has wrong type.
3561 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3562 #      this server or project.
3563 # 404: Requested object/revision/project doesn't exist.
3564 # 500: The server isn't configured properly, or
3565 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3566 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3567 # 503: The server is currently unavailable (because it is overloaded,
3568 #      or down for maintenance).  Generally, this is a temporary state.
3569 sub die_error {
3570         my $status = shift || 500;
3571         my $error = shift || "Internal server error";
3572
3573         my %http_responses = (
3574                 400 => '400 Bad Request',
3575                 403 => '403 Forbidden',
3576                 404 => '404 Not Found',
3577                 500 => '500 Internal Server Error',
3578                 503 => '503 Service Unavailable',
3579         );
3580         $out = \*STDOUT;
3581         git_header_html($http_responses{$status});
3582         print {$out} <<EOF;
3583 <div class="page_body">
3584 <br /><br />
3585 $status - $error
3586 <br />
3587 </div>
3588 EOF
3589         git_footer_html();
3590         exit;
3591 }
3592
3593 ## ----------------------------------------------------------------------
3594 ## functions printing or outputting HTML: navigation
3595
3596 sub git_print_page_nav {
3597         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3598         $extra = '' if !defined $extra; # pager or formats
3599
3600         my @navs = qw(summary shortlog log commit commitdiff tree);
3601         if ($suppress) {
3602                 @navs = grep { $_ ne $suppress } @navs;
3603         }
3604
3605         my %arg = map { $_ => {action=>$_} } @navs;
3606         if (defined $head) {
3607                 for (qw(commit commitdiff)) {
3608                         $arg{$_}{'hash'} = $head;
3609                 }
3610                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3611                         for (qw(shortlog log)) {
3612                                 $arg{$_}{'hash'} = $head;
3613                         }
3614                 }
3615         }
3616
3617         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3618         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3619
3620         my @actions = gitweb_get_feature('actions');
3621         my %repl = (
3622                 '%' => '%',
3623                 'n' => $project,         # project name
3624                 'f' => $git_dir,         # project path within filesystem
3625                 'h' => $treehead || '',  # current hash ('h' parameter)
3626                 'b' => $treebase || '',  # hash base ('hb' parameter)
3627         );
3628         while (@actions) {
3629                 my ($label, $link, $pos) = splice(@actions,0,3);
3630                 # insert
3631                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3632                 # munch munch
3633                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3634                 $arg{$label}{'_href'} = $link;
3635         }
3636
3637         print {$out} "<div class=\"page_nav\">\n" .
3638                 (join " | ",
3639                  map { $_ eq $current ?
3640                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3641                  } @navs);
3642         print {$out} "<br/>\n$extra<br/>\n" .
3643                      "</div>\n";
3644 }
3645
3646 sub format_paging_nav {
3647         my ($action, $page, $has_next_link) = @_;
3648         my $paging_nav;
3649
3650
3651         if ($page > 0) {
3652                 $paging_nav .=
3653                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3654                         " &sdot; " .
3655                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3656                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3657         } else {
3658                 $paging_nav .= "first &sdot; prev";
3659         }
3660
3661         if ($has_next_link) {
3662                 $paging_nav .= " &sdot; " .
3663                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3664                                  -accesskey => "n", -title => "Alt-n"}, "next");
3665         } else {
3666                 $paging_nav .= " &sdot; next";
3667         }
3668
3669         return $paging_nav;
3670 }
3671
3672 ## ......................................................................
3673 ## functions printing or outputting HTML: div
3674
3675 sub git_print_header_div {
3676         my ($action, $title, $hash, $hash_base) = @_;
3677         my %args = ();
3678
3679         $args{'action'} = $action;
3680         $args{'hash'} = $hash if $hash;
3681         $args{'hash_base'} = $hash_base if $hash_base;
3682
3683         print {$out} "<div class=\"header\">\n" .
3684                      $cgi->a({-href => href(%args), -class => "title"},
3685                      $title ? $title : $action) .
3686                      "\n</div>\n";
3687 }
3688
3689 sub print_local_time {
3690         my %date = @_;
3691         if ($date{'hour_local'} < 6) {
3692                 printf {$out} " (<span class=\"atnight\">%02d:%02d</span> %s)",
3693                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'};
3694         } else {
3695                 printf {$out} " (%02d:%02d %s)",
3696                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'};
3697         }
3698 }
3699
3700 # Outputs the author name and date in long form
3701 sub git_print_authorship {
3702         my $co = shift;
3703         my %opts = @_;
3704         my $tag = $opts{-tag} || 'div';
3705         my $author = $co->{'author_name'};
3706
3707         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3708         print {$out} "<$tag class=\"author_date\">" .
3709                      format_search_author($author, "author", esc_html($author)) .
3710                      " [$ad{'rfc2822'}";
3711         print_local_time(%ad) if ($opts{-localtime});
3712         print {$out} "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1) .
3713                      "</$tag>\n";
3714 }
3715
3716 # Outputs table rows containing the full author or committer information,
3717 # in the format expected for 'commit' view (& similia).
3718 # Parameters are a commit hash reference, followed by the list of people
3719 # to output information for. If the list is empty it defalts to both
3720 # author and committer.
3721 sub git_print_authorship_rows {
3722         my $co = shift;
3723         # too bad we can't use @people = @_ || ('author', 'committer')
3724         my @people = @_;
3725         @people = ('author', 'committer') unless @people;
3726         foreach my $who (@people) {
3727                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3728                 print {$out} "<tr><td>$who</td><td>" .
3729                              format_search_author($co->{"${who}_name"}, $who,
3730                              esc_html($co->{"${who}_name"})) . " " .
3731                              format_search_author($co->{"${who}_email"}, $who,
3732                              esc_html("<" . $co->{"${who}_email"} . ">")) .
3733                              "</td><td rowspan=\"2\">" .
3734                              git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3735                              "</td></tr>\n" .
3736                              "<tr>" .
3737                              "<td></td><td> $wd{'rfc2822'}";
3738                 print_local_time(%wd);
3739                 print {$out} "</td>" .
3740                              "</tr>\n";
3741         }
3742 }
3743
3744 sub git_print_page_path {
3745         my $name = shift;
3746         my $type = shift;
3747         my $hb = shift;
3748
3749
3750         print {$out} "<div class=\"page_path\">";
3751         print {$out} $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3752                              -title => 'tree root'}, to_utf8("[$project]"));
3753         print {$out} " / ";
3754         if (defined $name) {
3755                 my @dirname = split '/', $name;
3756                 my $basename = pop @dirname;
3757                 my $fullname = '';
3758
3759                 foreach my $dir (@dirname) {
3760                         $fullname .= ($fullname ? '/' : '') . $dir;
3761                         print {$out} $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3762                                                             hash_base=>$hb),
3763                                              -title => $fullname}, esc_path($dir));
3764                         print {$out} " / ";
3765                 }
3766                 if (defined $type && $type eq 'blob') {
3767                         print {$out} $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3768                                                             hash_base=>$hb),
3769                                              -title => $name}, esc_path($basename));
3770                 } elsif (defined $type && $type eq 'tree') {
3771                         print {$out} $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3772                                                             hash_base=>$hb),
3773                                              -title => $name}, esc_path($basename));
3774                         print {$out} " / ";
3775                 } else {
3776                         print {$out} esc_path($basename);
3777                 }
3778         }
3779         print {$out} "<br/></div>\n";
3780 }
3781
3782 sub git_print_log {
3783         my $log = shift;
3784         my %opts = @_;
3785
3786         if ($opts{'-remove_title'}) {
3787                 # remove title, i.e. first line of log
3788                 shift @$log;
3789         }
3790         # remove leading empty lines
3791         while (defined $log->[0] && $log->[0] eq "") {
3792                 shift @$log;
3793         }
3794
3795         # print log
3796         my $signoff = 0;
3797         my $empty = 0;
3798         foreach my $line (@$log) {
3799                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3800                         $signoff = 1;
3801                         $empty = 0;
3802                         if (! $opts{'-remove_signoff'}) {
3803                                 print {$out} "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3804                                 next;
3805                         } else {
3806                                 # remove signoff lines
3807                                 next;
3808                         }
3809                 } else {
3810                         $signoff = 0;
3811                 }
3812
3813                 # print only one empty line
3814                 # do not print empty line after signoff
3815                 if ($line eq "") {
3816                         next if ($empty || $signoff);
3817                         $empty = 1;
3818                 } else {
3819                         $empty = 0;
3820                 }
3821
3822                 print {$out} format_log_line_html($line) . "<br/>\n";
3823         }
3824
3825         if ($opts{'-final_empty_line'}) {
3826                 # end with single empty line
3827                 print {$out} "<br/>\n" unless $empty;
3828         }
3829 }
3830
3831 # return link target (what link points to)
3832 sub git_get_link_target {
3833         my $hash = shift;
3834         my $link_target;
3835
3836         # read link
3837         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3838                 or return;
3839         {
3840                 local $/ = undef;
3841                 $link_target = <$fd>;
3842         }
3843         close $fd
3844                 or return;
3845
3846         return $link_target;
3847 }
3848
3849 # given link target, and the directory (basedir) the link is in,
3850 # return target of link relative to top directory (top tree);
3851 # return undef if it is not possible (including absolute links).
3852 sub normalize_link_target {
3853         my ($link_target, $basedir) = @_;
3854
3855         # absolute symlinks (beginning with '/') cannot be normalized
3856         return if (substr($link_target, 0, 1) eq '/');
3857
3858         # normalize link target to path from top (root) tree (dir)
3859         my $path;
3860         if ($basedir) {
3861                 $path = $basedir . '/' . $link_target;
3862         } else {
3863                 # we are in top (root) tree (dir)
3864                 $path = $link_target;
3865         }
3866
3867         # remove //, /./, and /../
3868         my @path_parts;
3869         foreach my $part (split('/', $path)) {
3870                 # discard '.' and ''
3871                 next if (!$part || $part eq '.');
3872                 # handle '..'
3873                 if ($part eq '..') {
3874                         if (@path_parts) {
3875                                 pop @path_parts;
3876                         } else {
3877                                 # link leads outside repository (outside top dir)
3878                                 return;
3879                         }
3880                 } else {
3881                         push @path_parts, $part;
3882                 }
3883         }
3884         $path = join('/', @path_parts);
3885
3886         return $path;
3887 }
3888
3889 # print tree entry (row of git_tree), but without encompassing <tr> element
3890 sub git_print_tree_entry {
3891         my ($t, $basedir, $hash_base, $have_blame) = @_;
3892
3893         my %base_key = ();
3894         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3895
3896         # The format of a table row is: mode list link.  Where mode is
3897         # the mode of the entry, list is the name of the entry, an href,
3898         # and link is the action links of the entry.
3899
3900         print {$out} "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3901         if (exists $t->{'size'}) {
3902                 print {$out} "<td class=\"size\">$t->{'size'}</td>\n";
3903         }
3904         if ($t->{'type'} eq "blob") {
3905                 print {$out} "<td class=\"list\">" .
3906                              $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3907                                                     file_name=>"$basedir$t->{'name'}", %base_key),
3908                                       -class => "list"}, esc_path($t->{'name'}));
3909                 if (S_ISLNK(oct $t->{'mode'})) {
3910                         my $link_target = git_get_link_target($t->{'hash'});
3911                         if ($link_target) {
3912                                 my $norm_target = normalize_link_target($link_target, $basedir);
3913                                 if (defined $norm_target) {
3914                                         print {$out} " -> " .
3915                                                      $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3916                                                                             file_name=>$norm_target),
3917                                                               -title => $norm_target}, esc_path($link_target));
3918                                 } else {
3919                                         print {$out} " -> " . esc_path($link_target);
3920                                 }
3921                         }
3922                 }
3923                 print {$out} "</td>\n";
3924                 print {$out} "<td class=\"link\">";
3925                 print {$out} $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3926                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
3927                                      "blob");
3928                 if ($have_blame) {
3929                         print {$out} " | " .
3930                                      $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3931                                                             file_name=>"$basedir$t->{'name'}", %base_key)},
3932                                              "blame");
3933                 }
3934                 if (defined $hash_base) {
3935                         print {$out} " | " .
3936                                      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3937                                                             hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3938                                              "history");
3939                 }
3940                 print {$out} " | " .
3941                              $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3942                                                     file_name=>"$basedir$t->{'name'}")},
3943                                      "raw");
3944                 print {$out} "</td>\n";
3945
3946         } elsif ($t->{'type'} eq "tree") {
3947                 print {$out} "<td class=\"list\">";
3948                 print {$out} $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3949                                                     file_name=>"$basedir$t->{'name'}",
3950                                                     %base_key)},
3951                                      esc_path($t->{'name'}));
3952                 print {$out} "</td>\n";
3953                 print {$out} "<td class=\"link\">";
3954                 print {$out} $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3955                                                     file_name=>"$basedir$t->{'name'}",
3956                                                     %base_key)},
3957                                      "tree");
3958                 if (defined $hash_base) {
3959                         print {$out} " | " .
3960                                      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3961                                                             file_name=>"$basedir$t->{'name'}")},
3962                                              "history");
3963                 }
3964                 print {$out} "</td>\n";
3965
3966         } else {
3967                 # unknown object: we can only present history for it
3968                 # (this includes 'commit' object, i.e. submodule support)
3969                 print {$out} "<td class=\"list\">" .
3970                              esc_path($t->{'name'}) .
3971                              "</td>\n";
3972                 print {$out} "<td class=\"link\">";
3973                 if (defined $hash_base) {
3974                         print {$out} $cgi->a({-href => href(action=>"history",
3975                                                             hash_base=>$hash_base,
3976                                                             file_name=>"$basedir$t->{'name'}")},
3977                                              "history");
3978                 }
3979                 print {$out} "</td>\n";
3980         }
3981 }
3982
3983 ## ......................................................................
3984 ## functions printing large fragments of HTML
3985
3986 # get pre-image filenames for merge (combined) diff
3987 sub fill_from_file_info {
3988         my ($diff, @parents) = @_;
3989
3990         $diff->{'from_file'} = [ ];
3991         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3992         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3993                 if ($diff->{'status'}[$i] eq 'R' ||
3994                     $diff->{'status'}[$i] eq 'C') {
3995                         $diff->{'from_file'}[$i] =
3996                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3997                 }
3998         }
3999
4000         return $diff;
4001 }
4002
4003 # is current raw difftree line of file deletion
4004 sub is_deleted {
4005         my $diffinfo = shift;
4006
4007         return $diffinfo->{'to_id'} eq ('0' x 40);
4008 }
4009
4010 # does patch correspond to [previous] difftree raw line
4011 # $diffinfo  - hashref of parsed raw diff format
4012 # $patchinfo - hashref of parsed patch diff format
4013 #              (the same keys as in $diffinfo)
4014 sub is_patch_split {
4015         my ($diffinfo, $patchinfo) = @_;
4016
4017         return defined $diffinfo && defined $patchinfo
4018                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4019 }
4020
4021
4022 sub git_difftree_body {
4023         my ($difftree, $hash, @parents) = @_;
4024         my ($parent) = $parents[0];
4025         my $have_blame = gitweb_check_feature('blame');
4026         print {$out} "<div class=\"list_head\">\n";
4027         if ($#{$difftree} > 10) {
4028                 print {$out} (($#{$difftree} + 1) . " files changed:\n");
4029         }
4030         print {$out} "</div>\n";
4031
4032         print {$out} "<table class=\"" .
4033                      (@parents > 1 ? "combined " : "") .
4034                      "diff_tree\">\n";
4035
4036         # header only for combined diff in 'commitdiff' view
4037         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4038         if ($has_header) {
4039                 # table header
4040                 print {$out} "<thead><tr>\n" .
4041                              "<th></th><th></th>\n"; # filename, patchN link
4042                 for (my $i = 0; $i < @parents; $i++) {
4043                         my $par = $parents[$i];
4044                         print {$out} "<th>" .
4045                                      $cgi->a({-href => href(action=>"commitdiff",
4046                                                             hash=>$hash, hash_parent=>$par),
4047                                               -title => 'commitdiff to parent number ' .
4048                                                          ($i+1) . ': ' . substr($par,0,7)},
4049                                              $i+1) .
4050                                      "&nbsp;</th>\n";
4051                 }
4052                 print {$out} "</tr></thead>\n<tbody>\n";
4053         }
4054
4055         my $alternate = 1;
4056         my $patchno = 0;
4057         foreach my $line (@{$difftree}) {
4058                 my $diff = parsed_difftree_line($line);
4059
4060                 if ($alternate) {
4061                         print {$out} "<tr class=\"dark\">\n";
4062                 } else {
4063                         print {$out} "<tr class=\"light\">\n";
4064                 }
4065                 $alternate ^= 1;
4066
4067                 if (exists $diff->{'nparents'}) { # combined diff
4068
4069                         fill_from_file_info($diff, @parents)
4070                                 unless exists $diff->{'from_file'};
4071
4072                         if (!is_deleted($diff)) {
4073                                 # file exists in the result (child) commit
4074                                 print {$out} "<td>" .
4075                                              $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4076                                                                     file_name=>$diff->{'to_file'},
4077                                                                     hash_base=>$hash),
4078                                                      -class => "list"}, esc_path($diff->{'to_file'})) .
4079                                              "</td>\n";
4080                         } else {
4081                                 print {$out} "<td>" .
4082                                              esc_path($diff->{'to_file'}) .
4083                                              "</td>\n";
4084                         }
4085
4086                         if ($action eq 'commitdiff') {
4087                                 # link to patch
4088                                 $patchno++;
4089                                 print {$out} "<td class=\"link\">" .
4090                                              $cgi->a({-href => "#patch$patchno"}, "patch") .
4091                                              " | " .
4092                                              "</td>\n";
4093                         }
4094
4095                         my $has_history = 0;
4096                         my $not_deleted = 0;
4097                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4098                                 my $hash_parent = $parents[$i];
4099                                 my $from_hash = $diff->{'from_id'}[$i];
4100                                 my $from_path = $diff->{'from_file'}[$i];
4101                                 my $status = $diff->{'status'}[$i];
4102
4103                                 $has_history ||= ($status ne 'A');
4104                                 $not_deleted ||= ($status ne 'D');
4105
4106                                 if ($status eq 'A') {
4107                                         print {$out} "<td  class=\"link\" align=\"right\"> | </td>\n";
4108                                 } elsif ($status eq 'D') {
4109                                         print {$out} "<td class=\"link\">" .
4110                                                      $cgi->a({-href => href(action=>"blob",
4111                                                                             hash_base=>$hash,
4112                                                                             hash=>$from_hash,
4113                                                                             file_name=>$from_path)},
4114                                                              "blob" . ($i+1)) .
4115                                                      " | </td>\n";
4116                                 } else {
4117                                         if ($diff->{'to_id'} eq $from_hash) {
4118                                                 print {$out} "<td class=\"link nochange\">";
4119                                         } else {
4120                                                 print {$out} "<td class=\"link\">";
4121                                         }
4122                                         print {$out} $cgi->a({-href => href(action=>"blobdiff",
4123                                                                             hash=>$diff->{'to_id'},
4124                                                                             hash_parent=>$from_hash,
4125                                                                             hash_base=>$hash,
4126                                                                             hash_parent_base=>$hash_parent,
4127                                                                             file_name=>$diff->{'to_file'},
4128                                                                      file_parent=>$from_path)},
4129                                                              "diff" . ($i+1)) .
4130                                                      " | </td>\n";
4131                                 }
4132                         }
4133
4134                         print {$out} "<td class=\"link\">";
4135                         if ($not_deleted) {
4136                                 print {$out} $cgi->a({-href => href(action=>"blob",
4137                                                                     hash=>$diff->{'to_id'},
4138                                                                     file_name=>$diff->{'to_file'},
4139                                                                     hash_base=>$hash)},
4140                                                      "blob");
4141                                 print {$out} " | " if ($has_history);
4142                         }
4143                         if ($has_history) {
4144                                 print {$out} $cgi->a({-href => href(action=>"history",
4145                                                                     file_name=>$diff->{'to_file'},
4146                                                                     hash_base=>$hash)},
4147                                                      "history");
4148                         }
4149                         print {$out} "</td>\n";
4150
4151                         print {$out} "</tr>\n";
4152                         next; # instead of 'else' clause, to avoid extra indent
4153                 }
4154                 # else ordinary diff
4155
4156                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4157                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4158                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4159                         $to_mode_oct = oct $diff->{'to_mode'};
4160                         if (S_ISREG($to_mode_oct)) { # only for regular file
4161                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4162                         }
4163                         $to_file_type = file_type($diff->{'to_mode'});
4164                 }
4165                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4166                         $from_mode_oct = oct $diff->{'from_mode'};
4167                         if (S_ISREG($to_mode_oct)) { # only for regular file
4168                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4169                         }
4170                         $from_file_type = file_type($diff->{'from_mode'});
4171                 }
4172
4173                 if ($diff->{'status'} eq "A") { # created
4174                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4175                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4176                         $mode_chng   .= "]</span>";
4177                         print {$out} "<td>";
4178                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4179                                                             hash_base=>$hash, file_name=>$diff->{'file'}),
4180                                              -class => "list"}, esc_path($diff->{'file'}));
4181                         print {$out} "</td>\n";
4182                         print {$out} "<td>$mode_chng</td>\n";
4183                         print {$out} "<td class=\"link\">";
4184                         if ($action eq 'commitdiff') {
4185                                 # link to patch
4186                                 $patchno++;
4187                                 print {$out} $cgi->a({-href => "#patch$patchno"}, "patch");
4188                                 print {$out} " | ";
4189                         }
4190                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4191                                                             hash_base=>$hash, file_name=>$diff->{'file'})},
4192                                              "blob");
4193                         print {$out} "</td>\n";
4194
4195                 } elsif ($diff->{'status'} eq "D") { # deleted
4196                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4197                         print {$out} "<td>";
4198                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4199                                                             hash_base=>$parent, file_name=>$diff->{'file'}),
4200                                               -class => "list"}, esc_path($diff->{'file'}));
4201                         print {$out} "</td>\n";
4202                         print {$out} "<td>$mode_chng</td>\n";
4203                         print {$out} "<td class=\"link\">";
4204                         if ($action eq 'commitdiff') {
4205                                 # link to patch
4206                                 $patchno++;
4207                                 print {$out} $cgi->a({-href => "#patch$patchno"}, "patch");
4208                                 print {$out} " | ";
4209                         }
4210                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4211                                                             hash_base=>$parent, file_name=>$diff->{'file'})},
4212                                              "blob") . " | ";
4213                         if ($have_blame) {
4214                                 print {$out} $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4215                                                                     file_name=>$diff->{'file'})},
4216                                                      "blame") . " | ";
4217                         }
4218                         print {$out} $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4219                                                             file_name=>$diff->{'file'})},
4220                                              "history");
4221                         print {$out} "</td>\n";
4222
4223                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4224                         my $mode_chnge = "";
4225                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4226                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4227                                 if ($from_file_type ne $to_file_type) {
4228                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4229                                 }
4230                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4231                                         if ($from_mode_str && $to_mode_str) {
4232                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4233                                         } elsif ($to_mode_str) {
4234                                                 $mode_chnge .= " mode: $to_mode_str";
4235                                         }
4236                                 }
4237                                 $mode_chnge .= "]</span>\n";
4238                         }
4239                         print {$out} "<td>";
4240                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4241                                                             hash_base=>$hash, file_name=>$diff->{'file'}),
4242                                              -class => "list"}, esc_path($diff->{'file'}));
4243                         print {$out} "</td>\n";
4244                         print {$out} "<td>$mode_chnge</td>\n";
4245                         print {$out} "<td class=\"link\">";
4246                         if ($action eq 'commitdiff') {
4247                                 # link to patch
4248                                 $patchno++;
4249                                 print {$out} $cgi->a({-href => "#patch$patchno"}, "patch") .
4250                                              " | ";
4251                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4252                                 # "commit" view and modified file (not onlu mode changed)
4253                                 print {$out} $cgi->a({-href => href(action=>"blobdiff",
4254                                                                     hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4255                                                                     hash_base=>$hash, hash_parent_base=>$parent,
4256                                                                     file_name=>$diff->{'file'})},
4257                                                      "diff") .
4258                                              " | ";
4259                         }
4260                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4261                                                             hash_base=>$hash, file_name=>$diff->{'file'})},
4262                                               "blob") . " | ";
4263                         if ($have_blame) {
4264                                 print {$out} $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4265                                                                     file_name=>$diff->{'file'})},
4266                                                      "blame") . " | ";
4267                         }
4268                         print {$out} $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4269                                                             file_name=>$diff->{'file'})},
4270                                              "history");
4271                         print {$out} "</td>\n";
4272
4273                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4274                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4275                         my $nstatus = $status_name{$diff->{'status'}};
4276                         my $mode_chng = "";
4277                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4278                                 # mode also for directories, so we cannot use $to_mode_str
4279                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4280                         }
4281                         print {$out} "<td>" .
4282                                      $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4283                                                             hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4284                                              -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4285                                      "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4286                                      $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4287                                                             hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4288                                              -class => "list"}, esc_path($diff->{'from_file'})) .
4289                                      " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4290                                      "<td class=\"link\">";
4291                         if ($action eq 'commitdiff') {
4292                                 # link to patch
4293                                 $patchno++;
4294                                 print {$out} $cgi->a({-href => "#patch$patchno"}, "patch") .
4295                                              " | ";
4296                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4297                                 # "commit" view and modified file (not only pure rename or copy)
4298                                 print {$out} $cgi->a({-href => href(action=>"blobdiff",
4299                                                                     hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4300                                                                     hash_base=>$hash, hash_parent_base=>$parent,
4301                                                                     file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4302                                                      "diff") .
4303                                              " | ";
4304                         }
4305                         print {$out} $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4306                                                             hash_base=>$parent, file_name=>$diff->{'to_file'})},
4307                                              "blob") . " | ";
4308                         if ($have_blame) {
4309                                 print {$out} $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4310                                                                     file_name=>$diff->{'to_file'})},
4311                                                      "blame") . " | ";
4312                         }
4313                         print {$out} $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4314                                                            file_name=>$diff->{'to_file'})},
4315                                              "history");
4316                         print {$out} "</td>\n";
4317
4318                 } # we should not encounter Unmerged (U) or Unknown (X) status
4319                 print {$out} "</tr>\n";
4320         }
4321         print {$out} "</tbody>" if $has_header;
4322         print {$out} "</table>\n";
4323 }
4324
4325 sub git_patchset_body {
4326         my ($fd, $difftree, $hash, @hash_parents) = @_;
4327         my ($hash_parent) = $hash_parents[0];
4328
4329         my $is_combined = (@hash_parents > 1);
4330         my $patch_idx = 0;
4331         my $patch_number = 0;
4332         my $patch_line;
4333         my $diffinfo;
4334         my $to_name;
4335         my (%from, %to);
4336
4337         print {$out} "<div class=\"patchset\">\n";
4338
4339         # skip to first patch
4340         while ($patch_line = <$fd>) {
4341                 chomp $patch_line;
4342
4343                 last if ($patch_line =~ m/^diff /);
4344         }
4345
4346  PATCH:
4347         while ($patch_line) {
4348
4349                 # parse "git diff" header line
4350                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4351                         # $1 is from_name, which we do not use
4352                         $to_name = unquote($2);
4353                         $to_name =~ s!^b/!!;
4354                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4355                         # $1 is 'cc' or 'combined', which we do not use
4356                         $to_name = unquote($2);
4357                 } else {
4358                         $to_name = undef;
4359                 }
4360
4361                 # check if current patch belong to current raw line
4362                 # and parse raw git-diff line if needed
4363                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4364                         # this is continuation of a split patch
4365                         print {$out} "<div class=\"patch cont\">\n";
4366                 } else {
4367                         # advance raw git-diff output if needed
4368                         $patch_idx++ if defined $diffinfo;
4369
4370                         # read and prepare patch information
4371                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4372
4373                         # compact combined diff output can have some patches skipped
4374                         # find which patch (using pathname of result) we are at now;
4375                         if ($is_combined) {
4376                                 while ($to_name ne $diffinfo->{'to_file'}) {
4377                                         print {$out} "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4378                                                      format_diff_cc_simplified($diffinfo, @hash_parents) .
4379                                                      "</div>\n";  # class="patch"
4380
4381                                         $patch_idx++;
4382                                         $patch_number++;
4383
4384                                         last if $patch_idx > $#$difftree;
4385                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4386                                 }
4387                         }
4388
4389                         # modifies %from, %to hashes
4390                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4391
4392                         # this is first patch for raw difftree line with $patch_idx index
4393                         # we index @$difftree array from 0, but number patches from 1
4394                         print {$out} "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4395                 }
4396
4397                 # git diff header
4398                 #assert($patch_line =~ m/^diff /) if DEBUG;
4399                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4400                 $patch_number++;
4401                 # print "git diff" header
4402                 print {$out} format_git_diff_header_line($patch_line, $diffinfo,
4403                                                          \%from, \%to);
4404
4405                 # print extended diff header
4406                 print {$out} "<div class=\"diff extended_header\">\n";
4407         EXTENDED_HEADER:
4408                 while ($patch_line = <$fd>) {
4409                         chomp $patch_line;
4410
4411                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4412
4413                         print {$out} format_extended_diff_header_line($patch_line, $diffinfo,
4414                                                                       \%from, \%to);
4415                 }
4416                 print {$out} "</div>\n"; # class="diff extended_header"
4417
4418                 # from-file/to-file diff header
4419                 if (! $patch_line) {
4420                         print {$out} "</div>\n"; # class="patch"
4421                         last PATCH;
4422                 }
4423                 next PATCH if ($patch_line =~ m/^diff /);
4424                 #assert($patch_line =~ m/^---/) if DEBUG;
4425
4426                 my $last_patch_line = $patch_line;
4427                 $patch_line = <$fd>;
4428                 chomp $patch_line;
4429                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4430
4431                 print {$out} format_diff_from_to_header($last_patch_line, $patch_line,
4432                                                         $diffinfo, \%from, \%to,
4433                                                         @hash_parents);
4434
4435                 # the patch itself
4436         LINE:
4437                 while ($patch_line = <$fd>) {
4438                         chomp $patch_line;
4439
4440                         next PATCH if ($patch_line =~ m/^diff /);
4441
4442                         print {$out} format_diff_line($patch_line, \%from, \%to);
4443                 }
4444
4445         } continue {
4446                 print {$out} "</div>\n"; # class="patch"
4447         }
4448
4449         # for compact combined (--cc) format, with chunk and patch simpliciaction
4450         # patchset might be empty, but there might be unprocessed raw lines
4451         for (++$patch_idx if $patch_number > 0;
4452              $patch_idx < @$difftree;
4453              ++$patch_idx) {
4454                 # read and prepare patch information
4455                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4456
4457                 # generate anchor for "patch" links in difftree / whatchanged part
4458                 print {$out} "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4459                              format_diff_cc_simplified($diffinfo, @hash_parents) .
4460                              "</div>\n";  # class="patch"
4461
4462                 $patch_number++;
4463         }
4464
4465         if ($patch_number == 0) {
4466                 if (@hash_parents > 1) {
4467                         print {$out} "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4468                 } else {
4469                         print {$out} "<div class=\"diff nodifferences\">No differences found</div>\n";
4470                 }
4471         }
4472
4473         print {$out} "</div>\n"; # class="patchset"
4474 }
4475
4476 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4477
4478 # fills project list info (age, description, owner, forks) for each
4479 # project in the list, removing invalid projects from returned list
4480 # NOTE: modifies $projlist, but does not remove entries from it
4481 sub fill_project_list_info {
4482         my ($projlist, $check_forks) = @_;
4483         my @projects;
4484
4485         my $show_ctags = gitweb_check_feature('ctags');
4486  PROJECT:
4487         foreach my $pr (@$projlist) {
4488                 my (@activity) = git_get_last_activity($pr->{'path'});
4489                 unless (@activity) {
4490                         next PROJECT;
4491                 }
4492                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4493                 if (!defined $pr->{'descr'}) {
4494                         my $descr = git_get_project_description($pr->{'path'}) || "";
4495                         $descr = to_utf8($descr);
4496                         $pr->{'descr_long'} = $descr;
4497                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4498                 }
4499                 if (!defined $pr->{'owner'}) {
4500                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4501                 }
4502                 if ($check_forks) {
4503                         my $pname = $pr->{'path'};
4504                         if (($pname =~ s/\.git$//) &&
4505                             ($pname !~ /\/$/) &&
4506                             (-d "$projectroot/$pname")) {
4507                                 $pr->{'forks'} = "-d $projectroot/$pname";
4508                         } else {
4509                                 $pr->{'forks'} = 0;
4510                         }
4511                 }
4512                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4513                 push @projects, $pr;
4514         }
4515
4516         return @projects;
4517 }
4518
4519 # print 'sort by' <th> element, generating 'sort by $name' replay link
4520 # if that order is not selected
4521 sub print_sort_th {
4522         my ($name, $order, $header) = @_;
4523         $header ||= ucfirst($name);
4524
4525         if ($order eq $name) {
4526                 print {$out} "<th>$header</th>\n";
4527         } else {
4528                 print {$out} "<th>" .
4529                              $cgi->a({-href => href(-replay=>1, order=>$name),
4530                                       -class => "header"}, $header) .
4531                              "</th>\n";
4532         }
4533 }
4534
4535 sub git_project_list_body {
4536         # actually uses global variable $project
4537         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4538
4539         my $check_forks = gitweb_check_feature('forks');
4540         my @projects = fill_project_list_info($projlist, $check_forks);
4541
4542         $order ||= $default_projects_order;
4543         $from = 0 unless defined $from;
4544         $to = $#projects if (!defined $to || $#projects < $to);
4545
4546         my %order_info = (
4547                 project => { key => 'path', type => 'str' },
4548                 descr => { key => 'descr_long', type => 'str' },
4549                 owner => { key => 'owner', type => 'str' },
4550                 age => { key => 'age', type => 'num' }
4551         );
4552         my $oi = $order_info{$order};
4553         if ($oi->{'type'} eq 'str') {
4554                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4555         } else {
4556                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4557         }
4558
4559         my $show_ctags = gitweb_check_feature('ctags');
4560         if ($show_ctags) {
4561                 my %ctags;
4562                 foreach my $p (@projects) {
4563                         foreach my $ct (keys %{$p->{'ctags'}}) {
4564                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4565                         }
4566                 }
4567                 my $cloud = git_populate_project_tagcloud(\%ctags);
4568                 print {$out} git_show_project_tagcloud($cloud, 64);
4569         }
4570
4571         print {$out} "<table class=\"project_list\">\n";
4572         unless ($no_header) {
4573                 print {$out} "<tr>\n";
4574                 if ($check_forks) {
4575                         print {$out} "<th></th>\n";
4576                 }
4577                 print_sort_th('project', $order, 'Project');
4578                 print_sort_th('descr', $order, 'Description');
4579                 print_sort_th('owner', $order, 'Owner');
4580                 print_sort_th('age', $order, 'Last Change');
4581                 print {$out} "<th></th>\n" . # for links
4582                              "</tr>\n";
4583         }
4584         my $alternate = 1;
4585         my $tagfilter = $cgi->param('by_tag');
4586         for (my $i = $from; $i <= $to; $i++) {
4587                 my $pr = $projects[$i];
4588
4589                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4590                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4591                         and not $pr->{'descr_long'} =~ /$searchtext/;
4592                 # Weed out forks or non-matching entries of search
4593                 if ($check_forks) {
4594                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4595                         $forkbase="^$forkbase" if $forkbase;
4596                         next if not $searchtext and not $tagfilter and $show_ctags
4597                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4598                 }
4599
4600                 if ($alternate) {
4601                         print {$out} "<tr class=\"dark\">\n";
4602                 } else {
4603                         print {$out} "<tr class=\"light\">\n";
4604                 }
4605                 $alternate ^= 1;
4606                 if ($check_forks) {
4607                         print {$out} "<td>";
4608                         if ($pr->{'forks'}) {
4609                                 print {$out} "<!-- $pr->{'forks'} -->\n";
4610                                 print {$out} $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4611                         }
4612                         print {$out} "</td>\n";
4613                 }
4614                 print {$out} "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4615                                                -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4616                              "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4617                                                -class => "list", -title => $pr->{'descr_long'}},
4618                                                esc_html($pr->{'descr'})) . "</td>\n" .
4619                              "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4620                 print {$out} "<td class=\"". age_class($pr->{'age'}) . "\">" .
4621                              (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4622                              "<td class=\"link\">" .
4623                              $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4624                              $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4625                              $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4626                              $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4627                              ($pr->{'forks'} ?
4628                               " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")},
4629                                               "forks")
4630                              : '') .
4631                              ($gitlinkurl_base ?
4632                               " | " . $cgi->a({-href=>"$gitlinkurl_base/$pr->{'path'}",
4633                                                -rel=>"vcs-git"}, "git")
4634                              : '') .
4635                              "</td>\n" .
4636                              "</tr>\n";
4637         }
4638         if (defined $extra) {
4639                 print {$out} "<tr>\n";
4640                 if ($check_forks) {
4641                         print {$out} "<td></td>\n";
4642                 }
4643                 print {$out} "<td colspan=\"5\">$extra</td>\n" .
4644                              "</tr>\n";
4645         }
4646         print {$out} "</table>\n";
4647 }
4648
4649 sub git_log_body {
4650         # uses global variable $project
4651         my ($commitlist, $from, $to, $refs, $extra) = @_;
4652
4653         $from = 0 unless defined $from;
4654         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4655
4656         for (my $i = 0; $i <= $to; $i++) {
4657                 my %co = %{$commitlist->[$i]};
4658                 next if !%co;
4659                 my $commit = $co{'id'};
4660                 my $ref = format_ref_marker($refs, $commit);
4661                 my %ad = parse_date($co{'author_epoch'});
4662                 git_print_header_div('commit',
4663                                      "<span class=\"age\">$co{'age_string'}</span>" .
4664                                      esc_html($co{'title'}) . $ref,
4665                                      $commit);
4666                 print {$out} "<div class=\"title_text\">\n" .
4667                              "<div class=\"log_link\">\n" .
4668                              $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4669                              " | " .
4670                              $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4671                              " | " .
4672                              $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4673                              "<br/>\n" .
4674                              "</div>\n";
4675                 git_print_authorship(\%co, -tag => 'span');
4676                 print {$out} "<br/>\n</div>\n";
4677
4678                 print {$out} "<div class=\"log_body\">\n";
4679                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4680                 print {$out} "</div>\n";
4681         }
4682         if ($extra) {
4683                 print {$out} "<div class=\"page_nav\">\n";
4684                 print {$out} "$extra\n";
4685                 print {$out} "</div>\n";
4686         }
4687 }
4688
4689 sub git_shortlog_body {
4690         # uses global variable $project
4691         my ($commitlist, $from, $to, $refs, $extra) = @_;
4692
4693         $from = 0 unless defined $from;
4694         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4695
4696         print {$out} "<table class=\"shortlog\">\n";
4697         my $alternate = 1;
4698         for (my $i = $from; $i <= $to; $i++) {
4699                 my %co = %{$commitlist->[$i]};
4700                 my $commit = $co{'id'};
4701                 my $ref = format_ref_marker($refs, $commit);
4702                 if ($alternate) {
4703                         print {$out} "<tr class=\"dark\">\n";
4704                 } else {
4705                         print {$out} "<tr class=\"light\">\n";
4706                 }
4707                 $alternate ^= 1;
4708                 # git_summary() used 'print {$out} "<td><i>$co{'age_string'}</i></td>\n" .'
4709                 print {$out} "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4710                              format_author_html('td', \%co, 10) . "<td>";
4711                 print {$out} format_subject_html($co{'title'}, $co{'title_short'},
4712                                                  href(action=>"commit", hash=>$commit), $ref);
4713                 print {$out} "</td>\n" .
4714                              "<td class=\"link\">" .
4715                              $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4716                              $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4717                              $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4718                 my $snapshot_links = format_snapshot_links($commit);
4719                 if (defined $snapshot_links) {
4720                         print {$out} " | " . $snapshot_links;
4721                 }
4722                 print {$out} "</td>\n" .
4723                               "</tr>\n";
4724         }
4725         if (defined $extra) {
4726                 print {$out} "<tr>\n" .
4727                              "<td colspan=\"4\">$extra</td>\n" .
4728                              "</tr>\n";
4729         }
4730         print {$out} "</table>\n";
4731 }
4732
4733 sub git_history_body {
4734         # Warning: assumes constant type (blob or tree) during history
4735         my ($commitlist, $from, $to, $refs, $extra,
4736             $file_name, $file_hash, $ftype) = @_;
4737
4738         $from = 0 unless defined $from;
4739         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4740
4741         print {$out} "<table class=\"history\">\n";
4742         my $alternate = 1;
4743         for (my $i = $from; $i <= $to; $i++) {
4744                 my %co = %{$commitlist->[$i]};
4745                 if (!%co) {
4746                         next;
4747                 }
4748                 my $commit = $co{'id'};
4749
4750                 my $ref = format_ref_marker($refs, $commit);
4751
4752                 if ($alternate) {
4753                         print {$out} "<tr class=\"dark\">\n";
4754                 } else {
4755                         print {$out} "<tr class=\"light\">\n";
4756                 }
4757                 $alternate ^= 1;
4758                 print {$out} "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4759         # shortlog:    format_author_html('td', \%co, 10)
4760                              format_author_html('td', \%co, 15, 3) . "<td>";
4761                 # originally git_history used chop_str($co{'title'}, 50)
4762                 print {$out} format_subject_html($co{'title'}, $co{'title_short'},
4763                                                  href(action=>"commit", hash=>$commit), $ref);
4764                 print {$out} "</td>\n" .
4765                              "<td class=\"link\">" .
4766                              $cgi->a({-href => href(action=>$ftype, hash_base=>$commit,
4767                                                     file_name=>$file_name)}, $ftype) . " | " .
4768                              $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4769
4770                 if ($ftype eq 'blob') {
4771                         my $blob_current = $file_hash;
4772                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4773                         if (defined $blob_current && defined $blob_parent &&
4774                                         $blob_current ne $blob_parent) {
4775                                 print {$out} " | " .
4776                                              $cgi->a({-href => href(action=>"blobdiff",
4777                                                                     hash=>$blob_current, hash_parent=>$blob_parent,
4778                                                                     hash_base=>$hash_base, hash_parent_base=>$commit,
4779                                                                     file_name=>$file_name)},
4780                                                      "diff to current");
4781                         }
4782                 }
4783                 print {$out} "</td>\n" .
4784                              "</tr>\n";
4785         }
4786         if (defined $extra) {
4787                 print {$out} "<tr>\n" .
4788                              "<td colspan=\"4\">$extra</td>\n" .
4789                              "</tr>\n";
4790         }
4791         print {$out} "</table>\n";
4792 }
4793
4794 sub git_tags_body {
4795         # uses global variable $project
4796         my ($taglist, $from, $to, $extra) = @_;
4797         $from = 0 unless defined $from;
4798         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4799
4800         print {$out} "<table class=\"tags\">\n";
4801         my $alternate = 1;
4802         for (my $i = $from; $i <= $to; $i++) {
4803                 my $entry = $taglist->[$i];
4804                 my %tag = %$entry;
4805                 my $comment = $tag{'subject'};
4806                 my $comment_short;
4807                 if (defined $comment) {
4808                         $comment_short = chop_str($comment, 30, 5);
4809                 }
4810                 if ($alternate) {
4811                         print {$out} "<tr class=\"dark\">\n";
4812                 } else {
4813                         print {$out} "<tr class=\"light\">\n";
4814                 }
4815                 $alternate ^= 1;
4816                 if (defined $tag{'age'}) {
4817                         print {$out} "<td><i>$tag{'age'}</i></td>\n";
4818                 } else {
4819                         print {$out} "<td></td>\n";
4820                 }
4821                 print {$out} "<td>" .
4822                              $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4823                                       -class => "list name"}, esc_html($tag{'name'})) .
4824                              "</td>\n" .
4825                              "<td>";
4826                 if (defined $comment) {
4827                         print {$out} format_subject_html($comment, $comment_short,
4828                                                          href(action=>"tag", hash=>$tag{'id'}));
4829                 }
4830                 print {$out} "</td>\n" .
4831                              "<td class=\"selflink\">";
4832                 if ($tag{'type'} eq "tag") {
4833                         print {$out} $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4834                 } else {
4835                         print {$out} "&nbsp;";
4836                 }
4837                 print {$out} "</td>\n" .
4838                              "<td class=\"link\">" . " | " .
4839                              $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4840                 if ($tag{'reftype'} eq "commit") {
4841                         print {$out} " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4842                                      " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4843                 } elsif ($tag{'reftype'} eq "blob") {
4844                         print {$out} " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4845                 }
4846                 print {$out} "</td>\n" .
4847                              "</tr>";
4848         }
4849         if (defined $extra) {
4850                 print {$out} "<tr>\n" .
4851                              "<td colspan=\"5\">$extra</td>\n" .
4852                              "</tr>\n";
4853         }
4854         print {$out} "</table>\n";
4855 }
4856
4857 sub git_heads_body {
4858         # uses global variable $project
4859         my ($headlist, $head, $from, $to, $extra) = @_;
4860         $from = 0 unless defined $from;
4861         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4862
4863         print {$out} "<table class=\"heads\">\n";
4864         my $alternate = 1;
4865         for (my $i = $from; $i <= $to; $i++) {
4866                 my $entry = $headlist->[$i];
4867                 my %ref = %$entry;
4868                 my $curr = $ref{'id'} eq $head;
4869                 if ($alternate) {
4870                         print {$out} "<tr class=\"dark\">\n";
4871                 } else {
4872                         print {$out} "<tr class=\"light\">\n";
4873                 }
4874                 $alternate ^= 1;
4875                 print {$out} "<td><i>$ref{'age'}</i></td>\n" .
4876                              ($curr ? "<td class=\"current_head\">" : "<td>") .
4877                              $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4878                                       -class => "list name"},esc_html($ref{'name'})) .
4879                              "</td>\n" .
4880                              "<td class=\"link\">" .
4881                              $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4882                              $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4883                              $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'},
4884                                                     hash_base=>$ref{'name'})}, "tree") .
4885                              "</td>\n" .
4886                              "</tr>";
4887         }
4888         if (defined $extra) {
4889                 print {$out} "<tr>\n" .
4890                              "<td colspan=\"3\">$extra</td>\n" .
4891                              "</tr>\n";
4892         }
4893         print {$out} "</table>\n";
4894 }
4895
4896 sub git_search_grep_body {
4897         my ($commitlist, $from, $to, $extra) = @_;
4898         $from = 0 unless defined $from;
4899         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4900
4901         print {$out} "<table class=\"commit_search\">\n";
4902         my $alternate = 1;
4903         for (my $i = $from; $i <= $to; $i++) {
4904                 my %co = %{$commitlist->[$i]};
4905                 if (!%co) {
4906                         next;
4907                 }
4908                 my $commit = $co{'id'};
4909                 if ($alternate) {
4910                         print {$out} "<tr class=\"dark\">\n";
4911                 } else {
4912                         print {$out} "<tr class=\"light\">\n";
4913                 }
4914                 $alternate ^= 1;
4915                 print {$out} "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4916                              format_author_html('td', \%co, 15, 5) .
4917                              "<td>" .
4918                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4919                                       -class => "list subject"},
4920                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
4921                 my $comment = $co{'comment'};
4922                 foreach my $line (@$comment) {
4923                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4924                                 my ($lead, $match, $trail) = ($1, $2, $3);
4925                                 $match = chop_str($match, 70, 5, 'center');
4926                                 my $contextlen = int((80 - length($match))/2);
4927                                 $contextlen = 30 if ($contextlen > 30);
4928                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4929                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4930
4931                                 $lead  = esc_html($lead);
4932                                 $match = esc_html($match);
4933                                 $trail = esc_html($trail);
4934
4935                                 print {$out} "$lead<span class=\"match\">$match</span>$trail<br />";
4936                         }
4937                 }
4938                 print {$out} "</td>\n" .
4939                              "<td class=\"link\">" .
4940                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4941                              " | " .
4942                              $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4943                              " | " .
4944                              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4945                 print {$out} "</td>\n" .
4946                              "</tr>\n";
4947         }
4948         if (defined $extra) {
4949                 print {$out} "<tr>\n" .
4950                              "<td colspan=\"3\">$extra</td>\n" .
4951                              "</tr>\n";
4952         }
4953         print {$out} "</table>\n";
4954 }
4955
4956 ## ======================================================================
4957 ## ======================================================================
4958 ## actions
4959
4960 sub git_project_list {
4961         my $order = $input_params{'order'};
4962         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4963                 die_error(400, "Unknown order parameter");
4964         }
4965
4966         my @list = git_get_projects_list();
4967         if (!@list) {
4968                 die_error(404, "No projects found");
4969         }
4970
4971         git_header_html();
4972         if (-f $home_text) {
4973                 print {$out} "<div class=\"index_include\">\n";
4974                 insert_file($home_text);
4975                 print {$out} "</div>\n";
4976         }
4977         print {$out} $cgi->startform(-method => "get") .
4978                      "<p class=\"projsearch\">Search:\n" .
4979                      $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4980                      "</p>" .
4981                      $cgi->end_form() . "\n";
4982         git_project_list_body(\@list, $order);
4983         git_footer_html();
4984 }
4985
4986 sub git_forks {
4987         my $order = $input_params{'order'};
4988         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4989                 die_error(400, "Unknown order parameter");
4990         }
4991
4992         my @list = git_get_projects_list($project);
4993         if (!@list) {
4994                 die_error(404, "No forks found");
4995         }
4996
4997         git_header_html();
4998         git_print_page_nav('','');
4999         git_print_header_div('summary', "$project forks");
5000         git_project_list_body(\@list, $order);
5001         git_footer_html();
5002 }
5003
5004 sub git_project_index {
5005         my @projects = git_get_projects_list($project);
5006
5007         print {$out} $cgi->header(
5008                 -type => 'text/plain',
5009                 -charset => 'utf-8',
5010                 -content_disposition => 'inline; filename="index.aux"');
5011
5012         foreach my $pr (@projects) {
5013                 if (!exists $pr->{'owner'}) {
5014                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5015                 }
5016
5017                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5018                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5019                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5020                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5021                 $path  =~ s/ /\+/g;
5022                 $owner =~ s/ /\+/g;
5023
5024                 print {$out} "$path $owner\n";
5025         }
5026 }
5027
5028 sub git_summary {
5029         my $descr = git_get_project_description($project) || "none";
5030         my %co = parse_commit("HEAD");
5031         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5032         my $head = $co{'id'};
5033
5034         my $owner = git_get_project_owner($project);
5035
5036         my $refs = git_get_references();
5037         # These get_*_list functions return one more to allow us to see if
5038         # there are more ...
5039         my @taglist  = git_get_tags_list(16);
5040         my @headlist = git_get_heads_list(16);
5041         my @forklist;
5042         my $check_forks = gitweb_check_feature('forks');
5043
5044         if ($check_forks) {
5045                 @forklist = git_get_projects_list($project);
5046         }
5047
5048         git_header_html();
5049         git_print_page_nav('summary','', $head);
5050
5051         print {$out} "<div class=\"title\">&nbsp;</div>\n";
5052         print {$out} "<table class=\"projects_list\">\n" .
5053                      "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5054                      "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5055         if (defined $cd{'rfc2822'}) {
5056                 print {$out} "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5057         }
5058
5059         # use per project git URL list in $projectroot/$project/cloneurl
5060         # or make project git URL from git base URL and project name
5061         my $url_tag = "URL";
5062         my @url_list = git_get_project_url_list($project);
5063         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5064         foreach my $git_url (@url_list) {
5065                 next unless $git_url;
5066                 print {$out} "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5067                 $url_tag = "";
5068         }
5069
5070         # Tag cloud
5071         my $show_ctags = gitweb_check_feature('ctags');
5072         if ($show_ctags) {
5073                 my $ctags = git_get_project_ctags($project);
5074                 my $cloud = git_populate_project_tagcloud($ctags);
5075                 print {$out} "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5076                 print {$out} "</td>\n<td>" unless %$ctags;
5077                 print {$out} "<form action=\"$show_ctags\" method=\"post\">" .
5078                              "<input type=\"hidden\" name=\"p\" value=\"$project\" />" .
5079                              "Add: <input type=\"text\" name=\"t\" size=\"8\" />" .
5080                              "</form>";
5081                 print {$out} "</td>\n<td>" if %$ctags;
5082                 print {$out} git_show_project_tagcloud($cloud, 48);
5083                 print {$out} "</td></tr>";
5084         }
5085
5086         print {$out} "</table>\n";
5087
5088         # If XSS prevention is on, we don't include README.html.
5089         # TODO: Allow a readme in some safe format.
5090         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5091                 print {$out} "<div class=\"title\">readme</div>\n" .
5092                              "<div class=\"readme\">\n";
5093                 insert_file("$projectroot/$project/README.html");
5094                 print {$out} "\n</div>\n"; # class="readme"
5095         }
5096
5097         # we need to request one more than 16 (0..15) to check if
5098         # those 16 are all
5099         my @commitlist = $head ? parse_commits($head, 17) : ();
5100         if (@commitlist) {
5101                 git_print_header_div('shortlog');
5102                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5103                                   $#commitlist <=  15 ? undef :
5104                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5105         }
5106
5107         if (@taglist) {
5108                 git_print_header_div('tags');
5109                 git_tags_body(\@taglist, 0, 15,
5110                               $#taglist <=  15 ? undef :
5111                               $cgi->a({-href => href(action=>"tags")}, "..."));
5112         }
5113
5114         if (@headlist) {
5115                 git_print_header_div('heads');
5116                 git_heads_body(\@headlist, $head, 0, 15,
5117                                $#headlist <= 15 ? undef :
5118                                $cgi->a({-href => href(action=>"heads")}, "..."));
5119         }
5120
5121         if (@forklist) {
5122                 git_print_header_div('forks');
5123                 git_project_list_body(\@forklist, 'age', 0, 15,
5124                                       $#forklist <= 15 ? undef :
5125                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5126                                       'no_header');
5127         }
5128
5129         git_footer_html();
5130 }
5131
5132 sub git_tag {
5133         my $head = git_get_head_hash($project);
5134         git_header_html();
5135         git_print_page_nav('','', $head,undef,$head);
5136         my %tag = parse_tag($hash);
5137
5138         if (! %tag) {
5139                 die_error(404, "Unknown tag object");
5140         }
5141
5142         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5143         print {$out} "<div class=\"title_text\">\n" .
5144                      "<table class=\"object_header\">\n" .
5145                      "<tr>\n" .
5146                      "<td>object</td>\n" .
5147                      "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5148                                       $tag{'object'}) . "</td>\n" .
5149                      "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5150                                                      $tag{'type'}) . "</td>\n" .
5151                      "</tr>\n";
5152         if (defined($tag{'author'})) {
5153                 git_print_authorship_rows(\%tag, 'author');
5154         }
5155         print {$out} "</table>\n\n" .
5156                      "</div>\n";
5157         print {$out} "<div class=\"page_body\">";
5158         my $comment = $tag{'comment'};
5159         foreach my $line (@$comment) {
5160                 chomp $line;
5161                 print {$out} esc_html($line, -nbsp=>1) . "<br/>\n";
5162         }
5163         print {$out} "</div>\n";
5164         git_footer_html();
5165 }
5166
5167 sub git_blame_common {
5168         my $format = shift || 'porcelain';
5169         if ($format eq 'porcelain' && $cgi->param('js')) {
5170                 $format = 'incremental';
5171                 $action = 'blame_incremental'; # for page title etc
5172         }
5173
5174         # permissions
5175         gitweb_check_feature('blame')
5176                 or die_error(403, "Blame view not allowed");
5177
5178         # error checking
5179         die_error(400, "No file name given") unless $file_name;
5180         $hash_base ||= git_get_head_hash($project);
5181         die_error(404, "Couldn't find base commit") unless $hash_base;
5182         my %co = parse_commit($hash_base)
5183                 or die_error(404, "Commit not found");
5184         my $ftype = "blob";
5185         if (!defined $hash) {
5186                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5187                         or die_error(404, "Error looking up file");
5188         } else {
5189                 $ftype = git_get_type($hash);
5190                 if ($ftype !~ "blob") {
5191                         die_error(400, "Object is not a blob");
5192                 }
5193         }
5194
5195         my $fd;
5196         if ($format eq 'incremental') {
5197                 # get file contents (as base)
5198                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5199                         or die_error(500, "Open git-cat-file failed");
5200         } elsif ($format eq 'data') {
5201                 # run git-blame --incremental
5202                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5203                         $hash_base, "--", $file_name
5204                         or die_error(500, "Open git-blame --incremental failed");
5205         } else {
5206                 # run git-blame --porcelain
5207                 open $fd, "-|", git_cmd(), "blame", '-p',
5208                         $hash_base, '--', $file_name
5209                         or die_error(500, "Open git-blame --porcelain failed");
5210         }
5211
5212         # incremental blame data returns early
5213         if ($format eq 'data') {
5214                 print {$out} $cgi->header(
5215                         -type=>"text/plain", -charset => "utf-8",
5216                         -status=> "200 OK");
5217                 local $| = 1; # output autoflush
5218                 print {$out} $_ while <$fd>;
5219                 close $fd
5220                         or print {$out} "ERROR $!\n";
5221
5222                 print {$out} 'END';
5223                 if (defined $t0 && gitweb_check_feature('timed')) {
5224                         print {$out} ' '.
5225                                      Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5226                                      ' '.$number_of_git_cmds;
5227                 }
5228                 print {$out} "\n";
5229
5230                 return;
5231         }
5232
5233         # page header
5234         git_header_html();
5235         my $formats_nav =
5236                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5237                         "blob") .
5238                 " | ";
5239         if ($format eq 'incremental') {
5240                 $formats_nav .=
5241                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5242                                 "blame") . " (non-incremental)";
5243         } else {
5244                 $formats_nav .=
5245                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5246                                 "blame") . " (incremental)";
5247         }
5248         $formats_nav .=
5249                 " | " .
5250                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5251                         "history") .
5252                 " | " .
5253                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5254                         "HEAD");
5255         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5256         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5257         git_print_page_path($file_name, $ftype, $hash_base);
5258
5259         # page body
5260         if ($format eq 'incremental') {
5261                 print {$out} "<noscript>\n<div class=\"error\"><center><b>\n".
5262                              "This page requires JavaScript to run.\n Use ".
5263                              $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5264                                      'this page').
5265                              " instead.\n".
5266                              "</b></center></div>\n</noscript>\n";
5267
5268                 print {$out} qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5269         }
5270
5271         print {$out} qq!<div class="page_body">\n!;
5272         print {$out} qq!<div id="progress_info">... / ...</div>\n!
5273                 if ($format eq 'incremental');
5274         print {$out} qq!<table id="blame_table" class="blame" width="100%">\n!.
5275                      #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5276                      qq!<thead>\n!.
5277                      qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5278                      qq!</thead>\n!.
5279                      qq!<tbody>\n!;
5280
5281         my @rev_color = qw(light dark);
5282         my $num_colors = scalar(@rev_color);
5283         my $current_color = 0;
5284
5285         if ($format eq 'incremental') {
5286                 my $color_class = $rev_color[$current_color];
5287
5288                 #contents of a file
5289                 my $linenr = 0;
5290         LINE:
5291                 while (my $line = <$fd>) {
5292                         chomp $line;
5293                         $linenr++;
5294
5295                         print {$out} qq!<tr id="l$linenr" class="$color_class">!.
5296                                      qq!<td class="sha1"><a href=""> </a></td>!.
5297                                      qq!<td class="linenr">!.
5298                                      qq!<a class="linenr" href="">$linenr</a></td>!;
5299                         print {$out} qq!<td class="pre">! . esc_html($line) . "</td>\n";
5300                         print {$out} qq!</tr>\n!;
5301                 }
5302
5303         } else { # porcelain, i.e. ordinary blame
5304                 my %metainfo = (); # saves information about commits
5305
5306                 # blame data
5307         LINE:
5308                 while (my $line = <$fd>) {
5309                         chomp $line;
5310                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5311                         # no <lines in group> for subsequent lines in group of lines
5312                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5313                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5314                         if (!exists $metainfo{$full_rev}) {
5315                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5316                         }
5317                         my $meta = $metainfo{$full_rev};
5318                         my $data;
5319                         while ($data = <$fd>) {
5320                                 chomp $data;
5321                                 last if ($data =~ s/^\t//); # contents of line
5322                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5323                                         $meta->{$1} = $2 unless exists $meta->{$1};
5324                                 }
5325                                 if ($data =~ /^previous /) {
5326                                         $meta->{'nprevious'}++;
5327                                 }
5328                         }
5329                         my $short_rev = substr($full_rev, 0, 8);
5330                         my $author = $meta->{'author'};
5331                         my %date =
5332                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5333                         my $date = $date{'iso-tz'};
5334                         if ($group_size) {
5335                                 $current_color = ($current_color + 1) % $num_colors;
5336                         }
5337                         my $tr_class = $rev_color[$current_color];
5338                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5339                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5340                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5341                         print {$out} "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5342                         if ($group_size) {
5343                                 print {$out} "<td class=\"sha1\"";
5344                                 print {$out} " title=\"". esc_html($author) . ", $date\"";
5345                                 print {$out} " rowspan=\"$group_size\"" if ($group_size > 1);
5346                                 print {$out} ">";
5347                                 print {$out} $cgi->a({-href => href(action=>"commit",
5348                                                                     hash=>$full_rev,
5349                                                                     file_name=>$file_name)},
5350                                                      esc_html($short_rev));
5351                                 if ($group_size >= 2) {
5352                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5353                                         if (@author_initials) {
5354                                                 print {$out} "<br />" .
5355                                                              esc_html(join('', @author_initials));
5356                                                 #                  or join('.', ...)
5357                                         }
5358                                 }
5359                                 print {$out} "</td>\n";
5360                         }
5361                         # 'previous' <sha1 of parent commit> <filename at commit>
5362                         if (exists $meta->{'previous'} &&
5363                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5364                                 $meta->{'parent'} = $1;
5365                                 $meta->{'file_parent'} = unquote($2);
5366                         }
5367                         my $linenr_commit =
5368                                 exists($meta->{'parent'}) ?
5369                                 $meta->{'parent'} : $full_rev;
5370                         my $linenr_filename =
5371                                 exists($meta->{'file_parent'}) ?
5372                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5373                         my $blamed = href(action => 'blame',
5374                                           file_name => $linenr_filename,
5375                                           hash_base => $linenr_commit);
5376                         print {$out} "<td class=\"linenr\">";
5377                         print {$out} $cgi->a({ -href => "$blamed#l$orig_lineno",
5378                                                -class => "linenr" },
5379                                              esc_html($lineno));
5380                         print {$out} "</td>";
5381                         print {$out} "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5382                         print {$out} "</tr>\n";
5383                 } # end while
5384
5385         }
5386
5387         # footer
5388         print {$out} "</tbody>\n".
5389                      "</table>\n"; # class="blame"
5390         print {$out} "</div>\n";   # class="blame_body"
5391         close $fd
5392                 or print {$out} "Reading blob failed\n";
5393
5394         git_footer_html();
5395 }
5396
5397 sub git_blame {
5398         git_blame_common();
5399 }
5400
5401 sub git_blame_incremental {
5402         git_blame_common('incremental');
5403 }
5404
5405 sub git_blame_data {
5406         git_blame_common('data');
5407 }
5408
5409 sub git_tags {
5410         my $head = git_get_head_hash($project);
5411         git_header_html();
5412         git_print_page_nav('','', $head,undef,$head);
5413         git_print_header_div('summary', $project);
5414
5415         my @tagslist = git_get_tags_list();
5416         if (@tagslist) {
5417                 git_tags_body(\@tagslist);
5418         }
5419         git_footer_html();
5420 }
5421
5422 sub git_heads {
5423         my $head = git_get_head_hash($project);
5424         git_header_html();
5425         git_print_page_nav('','', $head,undef,$head);
5426         git_print_header_div('summary', $project);
5427
5428         my @headslist = git_get_heads_list();
5429         if (@headslist) {
5430                 git_heads_body(\@headslist, $head);
5431         }
5432         git_footer_html();
5433 }
5434
5435 sub git_blob_plain {
5436         my $type = shift;
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         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5453                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5454
5455         # content-type (can include charset)
5456         $type = blob_contenttype($fd, $file_name, $type);
5457
5458         # "save as" filename, even when no $file_name is given
5459         my $save_as = "$hash";
5460         if (defined $file_name) {
5461                 $save_as = $file_name;
5462         } elsif ($type =~ m/^text\//) {
5463                 $save_as .= '.txt';
5464         }
5465
5466         # With XSS prevention on, blobs of all types except a few known safe
5467         # ones are served with "Content-Disposition: attachment" to make sure
5468         # they don't run in our security domain.  For certain image types,
5469         # blob view writes an <img> tag referring to blob_plain view, and we
5470         # want to be sure not to break that by serving the image as an
5471         # attachment (though Firefox 3 doesn't seem to care).
5472         my $sandbox = $prevent_xss &&
5473                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5474
5475         print {$out} $cgi->header(
5476                 -type => $type,
5477                 -expires => $expires,
5478                 -content_disposition =>
5479                         ($sandbox ? 'attachment' : 'inline')
5480                         . '; filename="' . $save_as . '"');
5481         local $/ = undef;
5482         binmode $out, ':raw';
5483         print {$out} <$fd>;
5484         binmode $out, ':utf8'; # as set at the beginning of gitweb.cgi
5485         close $fd;
5486 }
5487
5488 sub git_blob {
5489         my $expires;
5490
5491         if (!defined $hash) {
5492                 if (defined $file_name) {
5493                         my $base = $hash_base || git_get_head_hash($project);
5494                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5495                                 or die_error(404, "Cannot find file");
5496                 } else {
5497                         die_error(400, "No file name defined");
5498                 }
5499         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5500                 # blobs defined by non-textual hash id's can be cached
5501                 $expires = "+1d";
5502         }
5503
5504         my $have_blame = gitweb_check_feature('blame');
5505         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5506                 or die_error(500, "Couldn't cat $file_name, $hash");
5507         my $mimetype = blob_mimetype($fd, $file_name);
5508         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5509                 close $fd;
5510                 return git_blob_plain($mimetype);
5511         }
5512         # we can have blame only for text/* mimetype
5513         $have_blame &&= ($mimetype =~ m!^text/!);
5514
5515         git_header_html(undef, $expires);
5516         my $formats_nav = '';
5517         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5518                 if (defined $file_name) {
5519                         if ($have_blame) {
5520                                 $formats_nav .=
5521                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5522                                                 "blame") .
5523                                         " | ";
5524                         }
5525                         $formats_nav .=
5526                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5527                                         "history") .
5528                                 " | " .
5529                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5530                                         "raw") .
5531                                 " | " .
5532                                 $cgi->a({-href => href(action=>"blob",
5533                                                        hash_base=>"HEAD", file_name=>$file_name)},
5534                                         "HEAD");
5535                 } else {
5536                         $formats_nav .=
5537                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5538                                         "raw");
5539                 }
5540                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5541                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5542         } else {
5543                 print {$out} "<div class=\"page_nav\">\n" .
5544                              "<br/><br/></div>\n" .
5545                              "<div class=\"title\">$hash</div>\n";
5546         }
5547         git_print_page_path($file_name, "blob", $hash_base);
5548         print {$out} "<div class=\"page_body\">\n";
5549         if ($mimetype =~ m!^image/!) {
5550                 print {$out} qq!<img type="$mimetype"!;
5551                 if ($file_name) {
5552                         print {$out} qq! alt="$file_name" title="$file_name"!;
5553                 }
5554                 print {$out} qq! src="! .
5555                              href(action=>"blob_plain", hash=>$hash,
5556                                   hash_base=>$hash_base, file_name=>$file_name) .
5557                              qq!" />\n!;
5558         } else {
5559                 my $nr;
5560                 while (my $line = <$fd>) {
5561                         chomp $line;
5562                         $nr++;
5563                         $line = untabify($line);
5564                         printf {$out} "<div class=\"pre\"><a id=\"l%i\" href=\"" .
5565                                       href(-replay => 1) .
5566                                       "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5567                                       $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5568                 }
5569         }
5570         close $fd
5571                 or print {$out} "Reading blob failed.\n";
5572         print {$out} "</div>";
5573         git_footer_html();
5574 }
5575
5576 sub git_tree {
5577         if (!defined $hash_base) {
5578                 $hash_base = "HEAD";
5579         }
5580         if (!defined $hash) {
5581                 if (defined $file_name) {
5582                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5583                 } else {
5584                         $hash = $hash_base;
5585                 }
5586         }
5587         die_error(404, "No such tree") unless defined($hash);
5588
5589         my $show_sizes = gitweb_check_feature('show-sizes');
5590         my $have_blame = gitweb_check_feature('blame');
5591
5592         my @entries = ();
5593         {
5594                 local $/ = "\0";
5595                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5596                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5597                         or die_error(500, "Open git-ls-tree failed");
5598                 @entries = map { chomp; $_ } <$fd>;
5599                 close $fd
5600                         or die_error(404, "Reading tree failed");
5601         }
5602
5603         my $refs = git_get_references();
5604         my $ref = format_ref_marker($refs, $hash_base);
5605         git_header_html();
5606         my $basedir = '';
5607         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5608                 my @views_nav = ();
5609                 if (defined $file_name) {
5610                         push @views_nav,
5611                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5612                                         "history"),
5613                                 $cgi->a({-href => href(action=>"tree",
5614                                                        hash_base=>"HEAD", file_name=>$file_name)},
5615                                         "HEAD"),
5616                 }
5617                 my $snapshot_links = format_snapshot_links($hash);
5618                 if (defined $snapshot_links) {
5619                         # FIXME: Should be available when we have no hash base as well.
5620                         push @views_nav, $snapshot_links;
5621                 }
5622                 git_print_page_nav('tree','', $hash_base, undef, undef,
5623                                    join(' | ', @views_nav));
5624                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5625         } else {
5626                 undef $hash_base;
5627                 print {$out} "<div class=\"page_nav\">\n";
5628                 print {$out} "<br/><br/></div>\n";
5629                 print {$out} "<div class=\"title\">$hash</div>\n";
5630         }
5631         if (defined $file_name) {
5632                 $basedir = $file_name;
5633                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5634                         $basedir .= '/';
5635                 }
5636                 git_print_page_path($file_name, 'tree', $hash_base);
5637         }
5638         print {$out} "<div class=\"page_body\">\n";
5639         print {$out} "<table class=\"tree\">\n";
5640         my $alternate = 1;
5641         # '..' (top directory) link if possible
5642         if (defined $hash_base &&
5643             defined $file_name && $file_name =~ m![^/]+$!) {
5644                 if ($alternate) {
5645                         print {$out} "<tr class=\"dark\">\n";
5646                 } else {
5647                         print {$out} "<tr class=\"light\">\n";
5648                 }
5649                 $alternate ^= 1;
5650
5651                 my $up = $file_name;
5652                 $up =~ s!/?[^/]+$!!;
5653                 undef $up unless $up;
5654                 # based on git_print_tree_entry
5655                 print {$out} '<td class="mode">' . mode_str('040000') . "</td>\n";
5656                 print {$out} '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5657                 print {$out} '<td class="list">';
5658                 print {$out} $cgi->a({-href => href(action=>"tree",
5659                                                     hash_base=>$hash_base,
5660                                                     file_name=>$up)},
5661                                      "..");
5662                 print {$out} "</td>\n";
5663                 print {$out} "<td class=\"link\"></td>\n";
5664
5665                 print {$out} "</tr>\n";
5666         }
5667         foreach my $line (@entries) {
5668                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5669
5670                 if ($alternate) {
5671                         print {$out} "<tr class=\"dark\">\n";
5672                 } else {
5673                         print {$out} "<tr class=\"light\">\n";
5674                 }
5675                 $alternate ^= 1;
5676
5677                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5678
5679                 print {$out} "</tr>\n";
5680         }
5681         print {$out} "</table>\n" .
5682                      "</div>";
5683         git_footer_html();
5684 }
5685
5686 sub snapshot_name {
5687         my ($project, $hash) = @_;
5688
5689         # path/to/project.git  -> project
5690         # path/to/project/.git -> project
5691         my $name = to_utf8($project);
5692         $name =~ s,([^/])/*\.git$,$1,;
5693         $name = basename($name);
5694         # sanitize name
5695         $name =~ s/[[:cntrl:]]/?/g;
5696
5697         my $ver = $hash;
5698         if ($hash =~ /^[0-9a-fA-F]+$/) {
5699                 # shorten SHA-1 hash
5700                 my $full_hash = git_get_full_hash($project, $hash);
5701                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5702                         $ver = git_get_short_hash($project, $hash);
5703                 }
5704         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5705                 # tags don't need shortened SHA-1 hash
5706                 $ver = $1;
5707         } else {
5708                 # branches and other need shortened SHA-1 hash
5709                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5710                         $ver = $1;
5711                 }
5712                 $ver .= '-' . git_get_short_hash($project, $hash);
5713         }
5714         # in case of hierarchical branch names
5715         $ver =~ s!/!.!g;
5716
5717         # name = project-version_string
5718         $name = "$name-$ver";
5719
5720         return wantarray ? ($name, $name) : $name;
5721 }
5722
5723 sub git_snapshot {
5724         my $format = $input_params{'snapshot_format'};
5725         if (!@snapshot_fmts) {
5726                 die_error(403, "Snapshots not allowed");
5727         }
5728         # default to first supported snapshot format
5729         $format ||= $snapshot_fmts[0];
5730         if ($format !~ m/^[a-z0-9]+$/) {
5731                 die_error(400, "Invalid snapshot format parameter");
5732         } elsif (!exists($known_snapshot_formats{$format})) {
5733                 die_error(400, "Unknown snapshot format");
5734         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5735                 die_error(403, "Snapshot format not allowed");
5736         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5737                 die_error(403, "Unsupported snapshot format");
5738         }
5739
5740         my $type = git_get_type("$hash^{}");
5741         if (!$type) {
5742                 die_error(404, 'Object does not exist');
5743         }  elsif ($type eq 'blob') {
5744                 die_error(400, 'Object is not a tree-ish');
5745         }
5746
5747         my ($name, $prefix) = snapshot_name($project, $hash);
5748         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5749         my $cmd = quote_command(
5750                 git_cmd(), 'archive',
5751                 "--format=$known_snapshot_formats{$format}{'format'}",
5752                 "--prefix=$prefix/", $hash);
5753         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5754                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5755         }
5756
5757         $filename =~ s/(["\\])/\\$1/g;
5758         print {$out} $cgi->header(
5759                 -type => $known_snapshot_formats{$format}{'type'},
5760                 -content_disposition => 'inline; filename="' . $filename . '"',
5761                 -status => '200 OK');
5762
5763         open my $fd, "-|", $cmd
5764                 or die_error(500, "Execute git-archive failed");
5765         binmode $out, ':raw';
5766         print {$out} <$fd>;
5767         binmode $out, ':utf8'; # as set at the beginning of gitweb.cgi
5768         close $fd;
5769 }
5770
5771 sub git_log_generic {
5772         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5773
5774         my $head = git_get_head_hash($project);
5775         if (!defined $base) {
5776                 $base = $head;
5777         }
5778         if (!defined $page) {
5779                 $page = 0;
5780         }
5781         my $refs = git_get_references();
5782
5783         my $commit_hash = $base;
5784         if (defined $parent) {
5785                 $commit_hash = "$parent..$base";
5786         }
5787         my @commitlist =
5788                 parse_commits($commit_hash, 101, (100 * $page),
5789                               defined $file_name ? ($file_name, "--full-history") : ());
5790
5791         my $ftype;
5792         if (!defined $file_hash && defined $file_name) {
5793                 # some commits could have deleted file in question,
5794                 # and not have it in tree, but one of them has to have it
5795                 for (my $i = 0; $i < @commitlist; $i++) {
5796                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5797                         last if defined $file_hash;
5798                 }
5799         }
5800         if (defined $file_hash) {
5801                 $ftype = git_get_type($file_hash);
5802         }
5803         if (defined $file_name && !defined $ftype) {
5804                 die_error(500, "Unknown type of object");
5805         }
5806         my %co;
5807         if (defined $file_name) {
5808                 %co = parse_commit($base)
5809                         or die_error(404, "Unknown commit object");
5810         }
5811
5812
5813         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5814         my $next_link = '';
5815         if ($#commitlist >= 100) {
5816                 $next_link =
5817                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5818                                  -accesskey => "n", -title => "Alt-n"}, "next");
5819         }
5820         my $patch_max = gitweb_get_feature('patches');
5821         if ($patch_max && !defined $file_name) {
5822                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5823                         $paging_nav .= " &sdot; " .
5824                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5825                                         "patches");
5826                 }
5827         }
5828
5829         git_header_html();
5830         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5831         if (defined $file_name) {
5832                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5833         } else {
5834                 git_print_header_div('summary', $project)
5835         }
5836         git_print_page_path($file_name, $ftype, $hash_base)
5837                 if (defined $file_name);
5838
5839         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5840                      $file_name, $file_hash, $ftype);
5841
5842         git_footer_html();
5843 }
5844
5845 sub git_log {
5846         git_log_generic('log', \&git_log_body,
5847                         $hash, $hash_parent);
5848 }
5849
5850 sub git_commit {
5851         $hash ||= $hash_base || "HEAD";
5852         my %co = parse_commit($hash)
5853             or die_error(404, "Unknown commit object");
5854
5855         my $parent  = $co{'parent'};
5856         my $parents = $co{'parents'}; # listref
5857
5858         # we need to prepare $formats_nav before any parameter munging
5859         my $formats_nav;
5860         if (!defined $parent) {
5861                 # --root commitdiff
5862                 $formats_nav .= '(initial)';
5863         } elsif (@$parents == 1) {
5864                 # single parent commit
5865                 $formats_nav .=
5866                         '(parent: ' .
5867                         $cgi->a({-href => href(action=>"commit",
5868                                                hash=>$parent)},
5869                                 esc_html(substr($parent, 0, 7))) .
5870                         ')';
5871         } else {
5872                 # merge commit
5873                 $formats_nav .=
5874                         '(merge: ' .
5875                         join(' ', map {
5876                                 $cgi->a({-href => href(action=>"commit",
5877                                                        hash=>$_)},
5878                                         esc_html(substr($_, 0, 7)));
5879                         } @$parents ) .
5880                         ')';
5881         }
5882         if (gitweb_check_feature('patches') && @$parents <= 1) {
5883                 $formats_nav .= " | " .
5884                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5885                                 "patch");
5886         }
5887
5888         if (!defined $parent) {
5889                 $parent = "--root";
5890         }
5891         my @difftree;
5892         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5893                 @diff_opts,
5894                 (@$parents <= 1 ? $parent : '-c'),
5895                 $hash, "--"
5896                 or die_error(500, "Open git-diff-tree failed");
5897         @difftree = map { chomp; $_ } <$fd>;
5898         close $fd or die_error(404, "Reading git-diff-tree failed");
5899
5900         # non-textual hash id's can be cached
5901         my $expires;
5902         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5903                 $expires = "+1d";
5904         }
5905         my $refs = git_get_references();
5906         my $ref = format_ref_marker($refs, $co{'id'});
5907
5908         git_header_html(undef, $expires);
5909         git_print_page_nav('commit', '',
5910                            $hash, $co{'tree'}, $hash,
5911                            $formats_nav);
5912
5913         if (defined $co{'parent'}) {
5914                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5915         } else {
5916                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5917         }
5918         print {$out} "<div class=\"title_text\">\n" .
5919                      "<table class=\"object_header\">\n";
5920         git_print_authorship_rows(\%co);
5921         print {$out} "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5922         print {$out} "<tr>" .
5923                      "<td>tree</td>" .
5924                      "<td class=\"sha1\">" .
5925                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5926                               class => "list"}, $co{'tree'}) .
5927                      "</td>" .
5928                      "<td class=\"link\">" .
5929                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5930                              "tree");
5931         my $snapshot_links = format_snapshot_links($hash);
5932         if (defined $snapshot_links) {
5933                 print {$out} " | " . $snapshot_links;
5934         }
5935         print {$out} "</td>" .
5936                      "</tr>\n";
5937
5938         foreach my $par (@$parents) {
5939                 print {$out} "<tr>" .
5940                              "<td>parent</td>" .
5941                              "<td class=\"sha1\">" .
5942                              $cgi->a({-href => href(action=>"commit", hash=>$par),
5943                                       class => "list"}, $par) .
5944                              "</td>" .
5945                              "<td class=\"link\">" .
5946                              $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5947                              " | " .
5948                              $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5949                              "</td>" .
5950                              "</tr>\n";
5951         }
5952         print {$out} "</table>".
5953                      "</div>\n";
5954
5955         print {$out} "<div class=\"page_body\">\n";
5956         git_print_log($co{'comment'});
5957         print {$out} "</div>\n";
5958
5959         git_difftree_body(\@difftree, $hash, @$parents);
5960
5961         git_footer_html();
5962 }
5963
5964 sub git_object {
5965         # object is defined by:
5966         # - hash or hash_base alone
5967         # - hash_base and file_name
5968         my $type;
5969
5970         # - hash or hash_base alone
5971         if ($hash || ($hash_base && !defined $file_name)) {
5972                 my $object_id = $hash || $hash_base;
5973
5974                 open my $fd, "-|", quote_command(
5975                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5976                         or die_error(404, "Object does not exist");
5977                 $type = <$fd>;
5978                 chomp $type;
5979                 close $fd
5980                         or die_error(404, "Object does not exist");
5981
5982         # - hash_base and file_name
5983         } elsif ($hash_base && defined $file_name) {
5984                 $file_name =~ s,/+$,,;
5985
5986                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5987                         or die_error(404, "Base object does not exist");
5988
5989                 # here errors should not hapen
5990                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5991                         or die_error(500, "Open git-ls-tree failed");
5992                 my $line = <$fd>;
5993                 close $fd;
5994
5995                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5996                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5997                         die_error(404, "File or directory for given base does not exist");
5998                 }
5999                 $type = $2;
6000                 $hash = $3;
6001         } else {
6002                 die_error(400, "Not enough information to find object");
6003         }
6004
6005         print {$out} $cgi->redirect(-uri => href(action=>$type, -full=>1,
6006                                                  hash=>$hash, hash_base=>$hash_base,
6007                                                  file_name=>$file_name),
6008                                     -status => '302 Found');
6009 }
6010
6011 sub git_blobdiff {
6012         my $format = shift || 'html';
6013
6014         my $fd;
6015         my @difftree;
6016         my %diffinfo;
6017         my $expires;
6018
6019         # preparing $fd and %diffinfo for git_patchset_body
6020         # new style URI
6021         if (defined $hash_base && defined $hash_parent_base) {
6022                 if (defined $file_name) {
6023                         # read raw output
6024                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6025                                 $hash_parent_base, $hash_base,
6026                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6027                                 or die_error(500, "Open git-diff-tree failed");
6028                         @difftree = map { chomp; $_ } <$fd>;
6029                         close $fd
6030                                 or die_error(404, "Reading git-diff-tree failed");
6031                         @difftree
6032                                 or die_error(404, "Blob diff not found");
6033
6034                 } elsif (defined $hash &&
6035                          $hash =~ /[0-9a-fA-F]{40}/) {
6036                         # try to find filename from $hash
6037
6038                         # read filtered raw output
6039                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6040                                 $hash_parent_base, $hash_base, "--"
6041                                 or die_error(500, "Open git-diff-tree failed");
6042                         @difftree =
6043                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6044                                 # $hash == to_id
6045                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6046                                 map { chomp; $_ } <$fd>;
6047                         close $fd
6048                                 or die_error(404, "Reading git-diff-tree failed");
6049                         @difftree
6050                                 or die_error(404, "Blob diff not found");
6051
6052                 } else {
6053                         die_error(400, "Missing one of the blob diff parameters");
6054                 }
6055
6056                 if (@difftree > 1) {
6057                         die_error(400, "Ambiguous blob diff specification");
6058                 }
6059
6060                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6061                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6062                 $file_name   ||= $diffinfo{'to_file'};
6063
6064                 $hash_parent ||= $diffinfo{'from_id'};
6065                 $hash        ||= $diffinfo{'to_id'};
6066
6067                 # non-textual hash id's can be cached
6068                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6069                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6070                         $expires = '+1d';
6071                 }
6072
6073                 # open patch output
6074                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6075                         '-p', ($format eq 'html' ? "--full-index" : ()),
6076                         $hash_parent_base, $hash_base,
6077                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6078                         or die_error(500, "Open git-diff-tree failed");
6079         }
6080
6081         # old/legacy style URI -- not generated anymore since 1.4.3.
6082         if (!%diffinfo) {
6083                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6084         }
6085
6086         # header
6087         if ($format eq 'html') {
6088                 my $formats_nav =
6089                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6090                                 "raw");
6091                 git_header_html(undef, $expires);
6092                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6093                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6094                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6095                 } else {
6096                         print {$out} "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6097                         print {$out} "<div class=\"title\">$hash vs $hash_parent</div>\n";
6098                 }
6099                 if (defined $file_name) {
6100                         git_print_page_path($file_name, "blob", $hash_base);
6101                 } else {
6102                         print {$out} "<div class=\"page_path\"></div>\n";
6103                 }
6104
6105         } elsif ($format eq 'plain') {
6106                 print {$out} $cgi->header(
6107                         -type => 'text/plain',
6108                         -charset => 'utf-8',
6109                         -expires => $expires,
6110                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6111
6112                 print {$out} "X-Git-Url: " . $cgi->self_url() . "\n\n";
6113
6114         } else {
6115                 die_error(400, "Unknown blobdiff format");
6116         }
6117
6118         # patch
6119         if ($format eq 'html') {
6120                 print {$out} "<div class=\"page_body\">\n";
6121
6122                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6123                 close $fd;
6124
6125                 print {$out} "</div>\n"; # class="page_body"
6126                 git_footer_html();
6127
6128         } else {
6129                 while (my $line = <$fd>) {
6130                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6131                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6132
6133                         print {$out} $line;
6134
6135                         last if $line =~ m!^\+\+\+!;
6136                 }
6137                 local $/ = undef;
6138                 print {$out} <$fd>;
6139                 close $fd;
6140         }
6141 }
6142
6143 sub git_blobdiff_plain {
6144         git_blobdiff('plain');
6145 }
6146
6147 sub git_commitdiff {
6148         my %params = @_;
6149         my $format = $params{-format} || 'html';
6150
6151         my ($patch_max) = gitweb_get_feature('patches');
6152         if ($format eq 'patch') {
6153                 die_error(403, "Patch view not allowed") unless $patch_max;
6154         }
6155
6156         $hash ||= $hash_base || "HEAD";
6157         my %co = parse_commit($hash)
6158             or die_error(404, "Unknown commit object");
6159
6160         # choose format for commitdiff for merge
6161         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6162                 $hash_parent = '--cc';
6163         }
6164         # we need to prepare $formats_nav before almost any parameter munging
6165         my $formats_nav;
6166         if ($format eq 'html') {
6167                 $formats_nav =
6168                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6169                                 "raw");
6170                 if ($patch_max && @{$co{'parents'}} <= 1) {
6171                         $formats_nav .= " | " .
6172                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6173                                         "patch");
6174                 }
6175
6176                 if (defined $hash_parent &&
6177                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6178                         # commitdiff with two commits given
6179                         my $hash_parent_short = $hash_parent;
6180                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6181                                 $hash_parent_short = substr($hash_parent, 0, 7);
6182                         }
6183                         $formats_nav .=
6184                                 ' (from';
6185                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6186                                 if ($co{'parents'}[$i] eq $hash_parent) {
6187                                         $formats_nav .= ' parent ' . ($i+1);
6188                                         last;
6189                                 }
6190                         }
6191                         $formats_nav .= ': ' .
6192                                 $cgi->a({-href => href(action=>"commitdiff",
6193                                                        hash=>$hash_parent)},
6194                                         esc_html($hash_parent_short)) .
6195                                 ')';
6196                 } elsif (!$co{'parent'}) {
6197                         # --root commitdiff
6198                         $formats_nav .= ' (initial)';
6199                 } elsif (scalar @{$co{'parents'}} == 1) {
6200                         # single parent commit
6201                         $formats_nav .=
6202                                 ' (parent: ' .
6203                                 $cgi->a({-href => href(action=>"commitdiff",
6204                                                        hash=>$co{'parent'})},
6205                                         esc_html(substr($co{'parent'}, 0, 7))) .
6206                                 ')';
6207                 } else {
6208                         # merge commit
6209                         if ($hash_parent eq '--cc') {
6210                                 $formats_nav .= ' | ' .
6211                                         $cgi->a({-href => href(action=>"commitdiff",
6212                                                                hash=>$hash, hash_parent=>'-c')},
6213                                                 'combined');
6214                         } else { # $hash_parent eq '-c'
6215                                 $formats_nav .= ' | ' .
6216                                         $cgi->a({-href => href(action=>"commitdiff",
6217                                                                hash=>$hash, hash_parent=>'--cc')},
6218                                                 'compact');
6219                         }
6220                         $formats_nav .=
6221                                 ' (merge: ' .
6222                                 join(' ', map {
6223                                         $cgi->a({-href => href(action=>"commitdiff",
6224                                                                hash=>$_)},
6225                                                 esc_html(substr($_, 0, 7)));
6226                                 } @{$co{'parents'}} ) .
6227                                 ')';
6228                 }
6229         }
6230
6231         my $hash_parent_param = $hash_parent;
6232         if (!defined $hash_parent_param) {
6233                 # --cc for multiple parents, --root for parentless
6234                 $hash_parent_param =
6235                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6236         }
6237
6238         # read commitdiff
6239         my $fd;
6240         my @difftree;
6241         if ($format eq 'html') {
6242                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6243                         "--no-commit-id", "--patch-with-raw", "--full-index",
6244                         $hash_parent_param, $hash, "--"
6245                         or die_error(500, "Open git-diff-tree failed");
6246
6247                 while (my $line = <$fd>) {
6248                         chomp $line;
6249                         # empty line ends raw part of diff-tree output
6250                         last unless $line;
6251                         push @difftree, scalar parse_difftree_raw_line($line);
6252                 }
6253
6254         } elsif ($format eq 'plain') {
6255                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6256                         '-p', $hash_parent_param, $hash, "--"
6257                         or die_error(500, "Open git-diff-tree failed");
6258         } elsif ($format eq 'patch') {
6259                 # For commit ranges, we limit the output to the number of
6260                 # patches specified in the 'patches' feature.
6261                 # For single commits, we limit the output to a single patch,
6262                 # diverging from the git-format-patch default.
6263                 my @commit_spec = ();
6264                 if ($hash_parent) {
6265                         if ($patch_max > 0) {
6266                                 push @commit_spec, "-$patch_max";
6267                         }
6268                         push @commit_spec, '-n', "$hash_parent..$hash";
6269                 } else {
6270                         if ($params{-single}) {
6271                                 push @commit_spec, '-1';
6272                         } else {
6273                                 if ($patch_max > 0) {
6274                                         push @commit_spec, "-$patch_max";
6275                                 }
6276                                 push @commit_spec, "-n";
6277                         }
6278                         push @commit_spec, '--root', $hash;
6279                 }
6280                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6281                         '--stdout', @commit_spec
6282                         or die_error(500, "Open git-format-patch failed");
6283         } else {
6284                 die_error(400, "Unknown commitdiff format");
6285         }
6286
6287         # non-textual hash id's can be cached
6288         my $expires;
6289         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6290                 $expires = "+1d";
6291         }
6292
6293         # write commit message
6294         if ($format eq 'html') {
6295                 my $refs = git_get_references();
6296                 my $ref = format_ref_marker($refs, $co{'id'});
6297
6298                 git_header_html(undef, $expires);
6299                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6300                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6301                 print {$out} "<div class=\"title_text\">\n" .
6302                              "<table class=\"object_header\">\n";
6303                 git_print_authorship_rows(\%co);
6304                 print {$out} "</table>".
6305                              "</div>\n";
6306                 print {$out} "<div class=\"page_body\">\n";
6307                 if (@{$co{'comment'}} > 1) {
6308                         print {$out} "<div class=\"log\">\n";
6309                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6310                         print {$out} "</div>\n"; # class="log"
6311                 }
6312
6313         } elsif ($format eq 'plain') {
6314                 my $refs = git_get_references("tags");
6315                 my $tagname = git_get_rev_name_tags($hash);
6316                 my $filename = basename($project) . "-$hash.patch";
6317
6318                 print {$out} $cgi->header(
6319                         -type => 'text/plain',
6320                         -charset => 'utf-8',
6321                         -expires => $expires,
6322                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6323                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6324                 print {$out} "From: " . to_utf8($co{'author'}) . "\n";
6325                 print {$out} "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6326                 print {$out} "Subject: " . to_utf8($co{'title'}) . "\n";
6327
6328                 print {$out} "X-Git-Tag: $tagname\n" if $tagname;
6329                 print {$out} "X-Git-Url: " . $cgi->self_url() . "\n\n";
6330
6331                 foreach my $line (@{$co{'comment'}}) {
6332                         print {$out} to_utf8($line) . "\n";
6333                 }
6334                 print {$out} "---\n\n";
6335         } elsif ($format eq 'patch') {
6336                 my $filename = basename($project) . "-$hash.patch";
6337
6338                 print {$out} $cgi->header(
6339                         -type => 'text/plain',
6340                         -charset => 'utf-8',
6341                         -expires => $expires,
6342                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6343         }
6344
6345         # write patch
6346         if ($format eq 'html') {
6347                 my $use_parents = !defined $hash_parent ||
6348                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6349                 git_difftree_body(\@difftree, $hash,
6350                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6351                 print {$out} "<br/>\n";
6352
6353                 git_patchset_body($fd, \@difftree, $hash,
6354                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6355                 close $fd;
6356                 print {$out} "</div>\n"; # class="page_body"
6357                 git_footer_html();
6358
6359         } elsif ($format eq 'plain') {
6360                 local $/ = undef;
6361                 print {$out} <$fd>;
6362                 close $fd
6363                         or print {$out} "Reading git-diff-tree failed\n";
6364         } elsif ($format eq 'patch') {
6365                 local $/ = undef;
6366                 print {$out} <$fd>;
6367                 close $fd
6368                         or print {$out} "Reading git-format-patch failed\n";
6369         }
6370 }
6371
6372 sub git_commitdiff_plain {
6373         git_commitdiff(-format => 'plain');
6374 }
6375
6376 # format-patch-style patches
6377 sub git_patch {
6378         git_commitdiff(-format => 'patch', -single => 1);
6379 }
6380
6381 sub git_patches {
6382         git_commitdiff(-format => 'patch');
6383 }
6384
6385 sub git_history {
6386         git_log_generic('history', \&git_history_body,
6387                         $hash_base, $hash_parent_base,
6388                         $file_name, $hash);
6389 }
6390
6391 sub git_search {
6392         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6393         if (!defined $searchtext) {
6394                 die_error(400, "Text field is empty");
6395         }
6396         if (!defined $hash) {
6397                 $hash = git_get_head_hash($project);
6398         }
6399         my %co = parse_commit($hash);
6400         if (!%co) {
6401                 die_error(404, "Unknown commit object");
6402         }
6403         if (!defined $page) {
6404                 $page = 0;
6405         }
6406
6407         $searchtype ||= 'commit';
6408         if ($searchtype eq 'pickaxe') {
6409                 # pickaxe may take all resources of your box and run for several minutes
6410                 # with every query - so decide by yourself how public you make this feature
6411                 gitweb_check_feature('pickaxe')
6412                         or die_error(403, "Pickaxe is disabled");
6413         }
6414         if ($searchtype eq 'grep') {
6415                 gitweb_check_feature('grep')
6416                         or die_error(403, "Grep is disabled");
6417         }
6418
6419         git_header_html();
6420
6421         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6422                 my $greptype;
6423                 if ($searchtype eq 'commit') {
6424                         $greptype = "--grep=";
6425                 } elsif ($searchtype eq 'author') {
6426                         $greptype = "--author=";
6427                 } elsif ($searchtype eq 'committer') {
6428                         $greptype = "--committer=";
6429                 }
6430                 $greptype .= $searchtext;
6431                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6432                                                $greptype, '--regexp-ignore-case',
6433                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6434
6435                 my $paging_nav = '';
6436                 if ($page > 0) {
6437                         $paging_nav .=
6438                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6439                                                        searchtext=>$searchtext,
6440                                                        searchtype=>$searchtype)},
6441                                         "first");
6442                         $paging_nav .= " &sdot; " .
6443                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6444                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6445                 } else {
6446                         $paging_nav .= "first";
6447                         $paging_nav .= " &sdot; prev";
6448                 }
6449                 my $next_link = '';
6450                 if ($#commitlist >= 100) {
6451                         $next_link =
6452                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6453                                          -accesskey => "n", -title => "Alt-n"}, "next");
6454                         $paging_nav .= " &sdot; $next_link";
6455                 } else {
6456                         $paging_nav .= " &sdot; next";
6457                 }
6458
6459                 if ($#commitlist >= 100) {
6460                 }
6461
6462                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6463                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6464                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6465         }
6466
6467         if ($searchtype eq 'pickaxe') {
6468                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6469                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6470
6471                 print {$out} "<table class=\"pickaxe search\">\n";
6472                 my $alternate = 1;
6473                 local $/ = "\n";
6474                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6475                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6476                         ($search_use_regexp ? '--pickaxe-regex' : ());
6477                 undef %co;
6478                 my @files;
6479                 while (my $line = <$fd>) {
6480                         chomp $line;
6481                         next unless $line;
6482
6483                         my %set = parse_difftree_raw_line($line);
6484                         if (defined $set{'commit'}) {
6485                                 # finish previous commit
6486                                 if (%co) {
6487                                         print {$out} "</td>\n" .
6488                                                      "<td class=\"link\">" .
6489                                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6490                                                      " | " .
6491                                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6492                                                                             hash_base=>$co{'id'})}, "tree");
6493                                         print {$out} "</td>\n" .
6494                                                      "</tr>\n";
6495                                 }
6496
6497                                 if ($alternate) {
6498                                         print {$out} "<tr class=\"dark\">\n";
6499                                 } else {
6500                                         print {$out} "<tr class=\"light\">\n";
6501                                 }
6502                                 $alternate ^= 1;
6503                                 %co = parse_commit($set{'commit'});
6504                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6505                                 print {$out} "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6506                                              "<td><i>$author</i></td>\n" .
6507                                              "<td>" .
6508                                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6509                                                      -class => "list subject"},
6510                                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6511                         } elsif (defined $set{'to_id'}) {
6512                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6513
6514                                 print {$out} $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6515                                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6516                                                      -class => "list"},
6517                                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6518                                              "<br/>\n";
6519                         }
6520                 }
6521                 close $fd;
6522
6523                 # finish last commit (warning: repetition!)
6524                 if (%co) {
6525                         print {$out} "</td>\n" .
6526                                      "<td class=\"link\">" .
6527                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6528                                      " | " .
6529                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6530                         print {$out} "</td>\n" .
6531                                      "</tr>\n";
6532                 }
6533
6534                 print {$out} "</table>\n";
6535         }
6536
6537         if ($searchtype eq 'grep') {
6538                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6539                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6540
6541                 print {$out} "<table class=\"grep_search\">\n";
6542                 my $alternate = 1;
6543                 my $matches = 0;
6544                 local $/ = "\n";
6545                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6546                         $search_use_regexp ? ('-E', '-i') : '-F',
6547                         $searchtext, $co{'tree'};
6548                 my $lastfile = '';
6549                 while (my $line = <$fd>) {
6550                         chomp $line;
6551                         my ($file, $lno, $ltext, $binary);
6552                         last if ($matches++ > 1000);
6553                         if ($line =~ /^Binary file (.+) matches$/) {
6554                                 $file = $1;
6555                                 $binary = 1;
6556                         } else {
6557                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6558                         }
6559                         if ($file ne $lastfile) {
6560                                 $lastfile and print {$out} "</td></tr>\n";
6561                                 if ($alternate++) {
6562                                         print {$out} "<tr class=\"dark\">\n";
6563                                 } else {
6564                                         print {$out} "<tr class=\"light\">\n";
6565                                 }
6566                                 print {$out} "<td class=\"list\">".
6567                                              $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6568                                                                     file_name=>"$file"),
6569                                                      -class => "list"}, esc_path($file));
6570                                 print {$out} "</td><td>\n";
6571                                 $lastfile = $file;
6572                         }
6573                         if ($binary) {
6574                                 print {$out} "<div class=\"binary\">Binary file</div>\n";
6575                         } else {
6576                                 $ltext = untabify($ltext);
6577                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6578                                         $ltext = esc_html($1, -nbsp=>1);
6579                                         $ltext .= '<span class="match">';
6580                                         $ltext .= esc_html($2, -nbsp=>1);
6581                                         $ltext .= '</span>';
6582                                         $ltext .= esc_html($3, -nbsp=>1);
6583                                 } else {
6584                                         $ltext = esc_html($ltext, -nbsp=>1);
6585                                 }
6586                                 print {$out} "<div class=\"pre\">" .
6587                                              $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6588                                                                     file_name=>"$file").'#l'.$lno,
6589                                                      -class => "linenr"}, sprintf('%4i', $lno)) .
6590                                              ' ' .  $ltext . "</div>\n";
6591                         }
6592                 }
6593                 if ($lastfile) {
6594                         print {$out} "</td></tr>\n";
6595                         if ($matches > 1000) {
6596                                 print {$out} "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6597                         }
6598                 } else {
6599                         print {$out} "<div class=\"diff nodifferences\">No matches found</div>\n";
6600                 }
6601                 close $fd;
6602
6603                 print {$out} "</table>\n";
6604         }
6605         git_footer_html();
6606 }
6607
6608 sub git_search_help {
6609         git_header_html();
6610         git_print_page_nav('','', $hash,$hash,$hash);
6611         print {$out} <<EOT;
6612 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6613 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6614 the pattern entered is recognized as the POSIX extended
6615 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6616 insensitive).</p>
6617 <dl>
6618 <dt><b>commit</b></dt>
6619 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6620 EOT
6621         my $have_grep = gitweb_check_feature('grep');
6622         if ($have_grep) {
6623                 print {$out} <<EOT;
6624 <dt><b>grep</b></dt>
6625 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6626     a different one) are searched for the given pattern. On large trees, this search can take
6627 a while and put some strain on the server, so please use it with some consideration. Note that
6628 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6629 case-sensitive.</dd>
6630 EOT
6631         }
6632         print {$out} <<EOT;
6633 <dt><b>author</b></dt>
6634 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6635 <dt><b>committer</b></dt>
6636 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6637 EOT
6638         my $have_pickaxe = gitweb_check_feature('pickaxe');
6639         if ($have_pickaxe) {
6640                 print {$out} <<EOT;
6641 <dt><b>pickaxe</b></dt>
6642 <dd>All commits that caused the string to appear or disappear from any file (changes that
6643 added, removed or "modified" the string) will be listed. This search can take a while and
6644 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6645 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6646 EOT
6647         }
6648         print {$out} "</dl>\n";
6649         git_footer_html();
6650 }
6651
6652 sub git_shortlog {
6653         git_log_generic('shortlog', \&git_shortlog_body,
6654                         $hash, $hash_parent);
6655 }
6656
6657 ## ......................................................................
6658 ## feeds (RSS, Atom; OPML)
6659
6660 sub git_feed {
6661         my $format = shift || 'atom';
6662         my $have_blame = gitweb_check_feature('blame');
6663
6664         # Atom: http://www.atomenabled.org/developers/syndication/
6665         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6666         if ($format ne 'rss' && $format ne 'atom') {
6667                 die_error(400, "Unknown web feed format");
6668         }
6669
6670         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6671         my $head = $hash || 'HEAD';
6672         my @commitlist = parse_commits($head, 150, 0, $file_name);
6673
6674         my %latest_commit;
6675         my %latest_date;
6676         my $content_type = "application/$format+xml";
6677         if (defined $cgi->http('HTTP_ACCEPT') &&
6678                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6679                 # browser (feed reader) prefers text/xml
6680                 $content_type = 'text/xml';
6681         }
6682         if (defined($commitlist[0])) {
6683                 %latest_commit = %{$commitlist[0]};
6684                 my $latest_epoch = $latest_commit{'committer_epoch'};
6685                 %latest_date   = parse_date($latest_epoch);
6686                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6687                 if (defined $if_modified) {
6688                         my $since;
6689                         if (eval { require HTTP::Date; 1; }) {
6690                                 $since = HTTP::Date::str2time($if_modified);
6691                         } elsif (eval { require Time::ParseDate; 1; }) {
6692                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6693                         }
6694                         if (defined $since && $latest_epoch <= $since) {
6695                                 print {$out} $cgi->header(
6696                                         -type => $content_type,
6697                                         -charset => 'utf-8',
6698                                         -last_modified => $latest_date{'rfc2822'},
6699                                         -status => '304 Not Modified');
6700                                 return;
6701                         }
6702                 }
6703                 print {$out} $cgi->header(
6704                         -type => $content_type,
6705                         -charset => 'utf-8',
6706                         -last_modified => $latest_date{'rfc2822'});
6707         } else {
6708                 print {$out} $cgi->header(
6709                         -type => $content_type,
6710                         -charset => 'utf-8');
6711         }
6712
6713         # Optimization: skip generating the body if client asks only
6714         # for Last-Modified date.
6715         return if ($cgi->request_method() eq 'HEAD');
6716
6717         # header variables
6718         my $title = "$site_name - $project/$action";
6719         my $feed_type = 'log';
6720         if (defined $hash) {
6721                 $title .= " - '$hash'";
6722                 $feed_type = 'branch log';
6723                 if (defined $file_name) {
6724                         $title .= " :: $file_name";
6725                         $feed_type = 'history';
6726                 }
6727         } elsif (defined $file_name) {
6728                 $title .= " - $file_name";
6729                 $feed_type = 'history';
6730         }
6731         $title .= " $feed_type";
6732         my $descr = git_get_project_description($project);
6733         if (defined $descr) {
6734                 $descr = esc_html($descr);
6735         } else {
6736                 $descr = "$project " .
6737                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6738                          " feed";
6739         }
6740         my $owner = git_get_project_owner($project);
6741         $owner = esc_html($owner);
6742
6743         #header
6744         my $alt_url;
6745         if (defined $file_name) {
6746                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6747         } elsif (defined $hash) {
6748                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6749         } else {
6750                 $alt_url = href(-full=>1, action=>"summary");
6751         }
6752         print {$out} qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6753         if ($format eq 'rss') {
6754                 print {$out} <<XML;
6755 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6756 <channel>
6757 XML
6758                 print {$out} "<title>$title</title>\n" .
6759                              "<link>$alt_url</link>\n" .
6760                              "<description>$descr</description>\n" .
6761                              "<language>en</language>\n" .
6762                              # project owner is responsible for 'editorial' content
6763                              "<managingEditor>$owner</managingEditor>\n";
6764                 if (defined $logo || defined $favicon) {
6765                         # prefer the logo to the favicon, since RSS
6766                         # doesn't allow both
6767                         my $img = esc_url($logo || $favicon);
6768                         print {$out} "<image>\n" .
6769                                      "<url>$img</url>\n" .
6770                                      "<title>$title</title>\n" .
6771                                      "<link>$alt_url</link>\n" .
6772                                      "</image>\n";
6773                 }
6774                 if (%latest_date) {
6775                         print {$out} "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6776                         print {$out} "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6777                 }
6778                 print {$out} "<generator>gitweb v.$version/$git_version</generator>\n";
6779         } elsif ($format eq 'atom') {
6780                 print {$out} <<XML;
6781 <feed xmlns="http://www.w3.org/2005/Atom">
6782 XML
6783                 print {$out} "<title>$title</title>\n" .
6784                              "<subtitle>$descr</subtitle>\n" .
6785                              '<link rel="alternate" type="text/html" href="' .
6786                              $alt_url . '" />' . "\n" .
6787                              '<link rel="self" type="' . $content_type . '" href="' .
6788                              $cgi->self_url() . '" />' . "\n" .
6789                              "<id>" . href(-full=>1) . "</id>\n" .
6790                              # use project owner for feed author
6791                              "<author><name>$owner</name></author>\n";
6792                 if (defined $favicon) {
6793                         print {$out} "<icon>" . esc_url($favicon) . "</icon>\n";
6794                 }
6795                 if (defined $logo_url) {
6796                         # not twice as wide as tall: 72 x 27 pixels
6797                         print {$out} "<logo>" . esc_url($logo) . "</logo>\n";
6798                 }
6799                 if (! %latest_date) {
6800                         # dummy date to keep the feed valid until commits trickle in:
6801                         print {$out} "<updated>1970-01-01T00:00:00Z</updated>\n";
6802                 } else {
6803                         print {$out} "<updated>$latest_date{'iso-8601'}</updated>\n";
6804                 }
6805                 print {$out} "<generator version='$version/$git_version'>gitweb</generator>\n";
6806         }
6807
6808         # contents
6809         for (my $i = 0; $i <= $#commitlist; $i++) {
6810                 my %co = %{$commitlist[$i]};
6811                 my $commit = $co{'id'};
6812                 # we read 150, we always show 30 and the ones more recent than 48 hours
6813                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6814                         last;
6815                 }
6816                 my %cd = parse_date($co{'author_epoch'});
6817
6818                 # get list of changed files
6819                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6820                         $co{'parent'} || "--root",
6821                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6822                         or next;
6823                 my @difftree = map { chomp; $_ } <$fd>;
6824                 close $fd
6825                         or next;
6826
6827                 # print element (entry, item)
6828                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6829                 if ($format eq 'rss') {
6830                         print {$out} "<item>\n" .
6831                                      "<title>" . esc_html($co{'title'}) . "</title>\n" .
6832                                      "<author>" . esc_html($co{'author'}) . "</author>\n" .
6833                                      "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6834                                      "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6835                                      "<link>$co_url</link>\n" .
6836                                      "<description>" . esc_html($co{'title'}) . "</description>\n" .
6837                                      "<content:encoded>" .
6838                                      "<![CDATA[\n";
6839                 } elsif ($format eq 'atom') {
6840                         print {$out} "<entry>\n" .
6841                                      "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6842                                      "<updated>$cd{'iso-8601'}</updated>\n" .
6843                                      "<author>\n" .
6844                                      "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6845                         if ($co{'author_email'}) {
6846                                 print {$out} "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6847                         }
6848                         print {$out} "</author>\n" .
6849                                      # use committer for contributor
6850                                      "<contributor>\n" .
6851                                      "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6852                         if ($co{'committer_email'}) {
6853                                 print {$out} "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6854                         }
6855                         print {$out} "</contributor>\n" .
6856                                      "<published>$cd{'iso-8601'}</published>\n" .
6857                                      "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6858                                      "<id>$co_url</id>\n" .
6859                                      "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6860                                      "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6861                 }
6862                 my $comment = $co{'comment'};
6863                 print {$out} "<pre>\n";
6864                 foreach my $line (@$comment) {
6865                         $line = esc_html($line);
6866                         print {$out} "$line\n";
6867                 }
6868                 print {$out} "</pre><ul>\n";
6869                 foreach my $difftree_line (@difftree) {
6870                         my %difftree = parse_difftree_raw_line($difftree_line);
6871                         next if !$difftree{'from_id'};
6872
6873                         my $file = $difftree{'file'} || $difftree{'to_file'};
6874
6875                         print {$out} "<li>" .
6876                                      "[" .
6877                                      $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6878                                                             hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6879                                                             hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6880                                                             file_name=>$file, file_parent=>$difftree{'from_file'}),
6881                                              -title => "diff"}, 'D');
6882                         if ($have_blame) {
6883                                 print {$out} $cgi->a({-href => href(-full=>1, action=>"blame",
6884                                                                     file_name=>$file, hash_base=>$commit),
6885                                                      -title => "blame"}, 'B');
6886                         }
6887                         # if this is not a feed of a file history
6888                         if (!defined $file_name || $file_name ne $file) {
6889                                 print {$out} $cgi->a({-href => href(-full=>1, action=>"history",
6890                                                                     file_name=>$file, hash=>$commit),
6891                                                      -title => "history"}, 'H');
6892                         }
6893                         $file = esc_path($file);
6894                         print {$out} "] ".
6895                                      "$file</li>\n";
6896                 }
6897                 if ($format eq 'rss') {
6898                         print {$out} "</ul>]]>\n" .
6899                                      "</content:encoded>\n" .
6900                                      "</item>\n";
6901                 } elsif ($format eq 'atom') {
6902                         print {$out} "</ul>\n</div>\n" .
6903                                      "</content>\n" .
6904                                      "</entry>\n";
6905                 }
6906         }
6907
6908         # end of feed
6909         if ($format eq 'rss') {
6910                 print {$out} "</channel>\n</rss>\n";
6911         } elsif ($format eq 'atom') {
6912                 print {$out} "</feed>\n";
6913         }
6914 }
6915
6916 sub git_rss {
6917         git_feed('rss');
6918 }
6919
6920 sub git_atom {
6921         git_feed('atom');
6922 }
6923
6924 sub git_opml {
6925         my @list = git_get_projects_list();
6926
6927         print {$out} $cgi->header(
6928                 -type => 'text/xml',
6929                 -charset => 'utf-8',
6930                 -content_disposition => 'inline; filename="opml.xml"');
6931
6932         print {$out} <<XML;
6933 <?xml version="1.0" encoding="utf-8"?>
6934 <opml version="1.0">
6935 <head>
6936   <title>$site_name OPML Export</title>
6937 </head>
6938 <body>
6939 <outline text="git RSS feeds">
6940 XML
6941
6942         foreach my $pr (@list) {
6943                 my %proj = %$pr;
6944                 my $head = git_get_head_hash($proj{'path'});
6945                 if (!defined $head) {
6946                         next;
6947                 }
6948                 $git_dir = "$projectroot/$proj{'path'}";
6949                 my %co = parse_commit($head);
6950                 if (!%co) {
6951                         next;
6952                 }
6953
6954                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6955                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6956                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6957                 print {$out} "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6958         }
6959         print {$out} <<XML;
6960 </outline>
6961 </body>
6962 </opml>
6963 XML
6964 }