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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # default order of projects list
 119 # valid values are none, project, descr, owner, and age
 120 our $default_projects_order = "project";
 121
 122 # show repository only if this file exists
 123 # (only effective if this variable evaluates to true)
 124 our $export_ok = "++GITWEB_EXPORT_OK++";
 125
 126 # show repository only if this subroutine returns true
 127 # when given the path to the project, for example:
 128 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 129 our $export_auth_hook = undef;
 130
 131 # only allow viewing of repositories also shown on the overview page
 132 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 133
 134 # list of git base URLs used for URL to where fetch project from,
 135 # i.e. full URL is "$git_base_url/$project"
 136 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 137
 138 # default blob_plain mimetype and default charset for text/plain blob
 139 our $default_blob_plain_mimetype = 'text/plain';
 140 our $default_text_plain_charset  = undef;
 141
 142 # file to use for guessing MIME types before trying /etc/mime.types
 143 # (relative to the current git repository)
 144 our $mimetypes_file = undef;
 145
 146 # assume this charset if line contains non-UTF-8 characters;
 147 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 148 # for which encoding all byte sequences are valid, for example
 149 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 150 # could be even 'utf-8' for the old behavior)
 151 our $fallback_encoding = 'latin1';
 152
 153 # rename detection options for git-diff and git-diff-tree
 154 # - default is '-M', with the cost proportional to
 155 #   (number of removed files) * (number of new files).
 156 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 157 #   (number of changed files + number of removed files) * (number of new files)
 158 # - even more costly is '-C', '--find-copies-harder' with cost
 159 #   (number of files in the original tree) * (number of new files)
 160 # - one might want to include '-B' option, e.g. '-B', '-M'
 161 our @diff_opts = ('-M'); # taken from git_commit
 162
 163 # Disables features that would allow repository owners to inject script into
 164 # the gitweb domain.
 165 our $prevent_xss = 0;
 166
 167 # Path to the highlight executable to use (must be the one from
 168 # http://www.andre-simon.de due to assumptions about parameters and output).
 169 # Useful if highlight is not installed on your webserver's PATH.
 170 # [Default: highlight]
 171 our $highlight_bin = "++HIGHLIGHT_BIN++";
 172
 173 # information about snapshot formats that gitweb is capable of serving
 174 our %known_snapshot_formats = (
 175         # name => {
 176         #       'display' => display name,
 177         #       'type' => mime type,
 178         #       'suffix' => filename suffix,
 179         #       'format' => --format for git-archive,
 180         #       'compressor' => [compressor command and arguments]
 181         #                       (array reference, optional)
 182         #       'disabled' => boolean (optional)}
 183         #
 184         'tgz' => {
 185                 'display' => 'tar.gz',
 186                 'type' => 'application/x-gzip',
 187                 'suffix' => '.tar.gz',
 188                 'format' => 'tar',
 189                 'compressor' => ['gzip', '-n']},
 190
 191         'tbz2' => {
 192                 'display' => 'tar.bz2',
 193                 'type' => 'application/x-bzip2',
 194                 'suffix' => '.tar.bz2',
 195                 'format' => 'tar',
 196                 'compressor' => ['bzip2']},
 197
 198         'txz' => {
 199                 'display' => 'tar.xz',
 200                 'type' => 'application/x-xz',
 201                 'suffix' => '.tar.xz',
 202                 'format' => 'tar',
 203                 'compressor' => ['xz'],
 204                 'disabled' => 1},
 205
 206         'zip' => {
 207                 'display' => 'zip',
 208                 'type' => 'application/x-zip',
 209                 'suffix' => '.zip',
 210                 'format' => 'zip'},
 211 );
 212
 213 # Aliases so we understand old gitweb.snapshot values in repository
 214 # configuration.
 215 our %known_snapshot_format_aliases = (
 216         'gzip'  => 'tgz',
 217         'bzip2' => 'tbz2',
 218         'xz'    => 'txz',
 219
 220         # backward compatibility: legacy gitweb config support
 221         'x-gzip' => undef, 'gz' => undef,
 222         'x-bzip2' => undef, 'bz2' => undef,
 223         'x-zip' => undef, '' => undef,
 224 );
 225
 226 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 227 # are changed, it may be appropriate to change these values too via
 228 # $GITWEB_CONFIG.
 229 our %avatar_size = (
 230         'default' => 16,
 231         'double'  => 32
 232 );
 233
 234 # Used to set the maximum load that we will still respond to gitweb queries.
 235 # If server load exceed this value then return "503 server busy" error.
 236 # If gitweb cannot determined server load, it is taken to be 0.
 237 # Leave it undefined (or set to 'undef') to turn off load checking.
 238 our $maxload = 300;
 239
 240 # configuration for 'highlight' (http://www.andre-simon.de/)
 241 # match by basename
 242 our %highlight_basename = (
 243         #'Program' => 'py',
 244         #'Library' => 'py',
 245         'SConstruct' => 'py', # SCons equivalent of Makefile
 246         'Makefile' => 'make',
 247 );
 248 # match by extension
 249 our %highlight_ext = (
 250         # main extensions, defining name of syntax;
 251         # see files in /usr/share/highlight/langDefs/ directory
 252         map { $_ => $_ }
 253                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 254         # alternate extensions, see /etc/highlight/filetypes.conf
 255         'h' => 'c',
 256         map { $_ => 'sh'  } qw(bash zsh ksh),
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4 php5 phps),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         map { $_ => 'make'} qw(mak mk),
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags of project repository,
 416         # and display the popular Web 2.0-ish "tag cloud" near the projects
 417         # list.  Note that this is something COMPLETELY different from the
 418         # normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need to do it externally, outside gitweb.
 422         # The format is described in git_get_project_ctags() subroutine.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = [1];
 428         # Project specific override is not supported.
 429
 430         # In the future whether ctags editing is enabled might depend
 431         # on the value, but using 1 should always mean no editing of ctags.
 432         'ctags' => {
 433                 'override' => 0,
 434                 'default' => [0]},
 435
 436         # The maximum number of patches in a patchset generated in patch
 437         # view. Set this to 0 or undef to disable patch view, or to a
 438         # negative number to remove any limit.
 439
 440         # To disable system wide have in $GITWEB_CONFIG
 441         # $feature{'patches'}{'default'} = [0];
 442         # To have project specific config enable override in $GITWEB_CONFIG
 443         # $feature{'patches'}{'override'} = 1;
 444         # and in project config gitweb.patches = 0|n;
 445         # where n is the maximum number of patches allowed in a patchset.
 446         'patches' => {
 447                 'sub' => \&feature_patches,
 448                 'override' => 0,
 449                 'default' => [16]},
 450
 451         # Avatar support. When this feature is enabled, views such as
 452         # shortlog or commit will display an avatar associated with
 453         # the email of the committer(s) and/or author(s).
 454
 455         # Currently available providers are gravatar and picon.
 456         # If an unknown provider is specified, the feature is disabled.
 457
 458         # Gravatar depends on Digest::MD5.
 459         # Picon currently relies on the indiana.edu database.
 460
 461         # To enable system wide have in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'default'} = ['<provider>'];
 463         # where <provider> is either gravatar or picon.
 464         # To have project specific config enable override in $GITWEB_CONFIG
 465         # $feature{'avatar'}{'override'} = 1;
 466         # and in project config gitweb.avatar = <provider>;
 467         'avatar' => {
 468                 'sub' => \&feature_avatar,
 469                 'override' => 0,
 470                 'default' => ['']},
 471
 472         # Enable displaying how much time and how many git commands
 473         # it took to generate and display page.  Disabled by default.
 474         # Project specific override is not supported.
 475         'timed' => {
 476                 'override' => 0,
 477                 'default' => [0]},
 478
 479         # Enable turning some links into links to actions which require
 480         # JavaScript to run (like 'blame_incremental').  Not enabled by
 481         # default.  Project specific override is currently not supported.
 482         'javascript-actions' => {
 483                 'override' => 0,
 484                 'default' => [0]},
 485
 486         # Syntax highlighting support. This is based on Daniel Svensson's
 487         # and Sham Chukoury's work in gitweb-xmms2.git.
 488         # It requires the 'highlight' program present in $PATH,
 489         # and therefore is disabled by default.
 490
 491         # To enable system wide have in $GITWEB_CONFIG
 492         # $feature{'highlight'}{'default'} = [1];
 493
 494         'highlight' => {
 495                 'sub' => sub { feature_bool('highlight', @_) },
 496                 'override' => 0,
 497                 'default' => [0]},
 498
 499         # Enable displaying of remote heads in the heads list
 500
 501         # To enable system wide have in $GITWEB_CONFIG
 502         # $feature{'remote_heads'}{'default'} = [1];
 503         # To have project specific config enable override in $GITWEB_CONFIG
 504         # $feature{'remote_heads'}{'override'} = 1;
 505         # and in project config gitweb.remote_heads = 0|1;
 506         'remote_heads' => {
 507                 'sub' => sub { feature_bool('remote_heads', @_) },
 508                 'override' => 0,
 509                 'default' => [0]},
 510 );
 511
 512 sub gitweb_get_feature {
 513         my ($name) = @_;
 514         return unless exists $feature{$name};
 515         my ($sub, $override, @defaults) = (
 516                 $feature{$name}{'sub'},
 517                 $feature{$name}{'override'},
 518                 @{$feature{$name}{'default'}});
 519         # project specific override is possible only if we have project
 520         our $git_dir; # global variable, declared later
 521         if (!$override || !defined $git_dir) {
 522                 return @defaults;
 523         }
 524         if (!defined $sub) {
 525                 warn "feature $name is not overridable";
 526                 return @defaults;
 527         }
 528         return $sub->(@defaults);
 529 }
 530
 531 # A wrapper to check if a given feature is enabled.
 532 # With this, you can say
 533 #
 534 #   my $bool_feat = gitweb_check_feature('bool_feat');
 535 #   gitweb_check_feature('bool_feat') or somecode;
 536 #
 537 # instead of
 538 #
 539 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 540 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 541 #
 542 sub gitweb_check_feature {
 543         return (gitweb_get_feature(@_))[0];
 544 }
 545
 546
 547 sub feature_bool {
 548         my $key = shift;
 549         my ($val) = git_get_project_config($key, '--bool');
 550
 551         if (!defined $val) {
 552                 return ($_[0]);
 553         } elsif ($val eq 'true') {
 554                 return (1);
 555         } elsif ($val eq 'false') {
 556                 return (0);
 557         }
 558 }
 559
 560 sub feature_snapshot {
 561         my (@fmts) = @_;
 562
 563         my ($val) = git_get_project_config('snapshot');
 564
 565         if ($val) {
 566                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 567         }
 568
 569         return @fmts;
 570 }
 571
 572 sub feature_patches {
 573         my @val = (git_get_project_config('patches', '--int'));
 574
 575         if (@val) {
 576                 return @val;
 577         }
 578
 579         return ($_[0]);
 580 }
 581
 582 sub feature_avatar {
 583         my @val = (git_get_project_config('avatar'));
 584
 585         return @val ? @val : @_;
 586 }
 587
 588 # checking HEAD file with -e is fragile if the repository was
 589 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 590 # and then pruned.
 591 sub check_head_link {
 592         my ($dir) = @_;
 593         my $headfile = "$dir/HEAD";
 594         return ((-e $headfile) ||
 595                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 596 }
 597
 598 sub check_export_ok {
 599         my ($dir) = @_;
 600         return (check_head_link($dir) &&
 601                 (!$export_ok || -e "$dir/$export_ok") &&
 602                 (!$export_auth_hook || $export_auth_hook->($dir)));
 603 }
 604
 605 # process alternate names for backward compatibility
 606 # filter out unsupported (unknown) snapshot formats
 607 sub filter_snapshot_fmts {
 608         my @fmts = @_;
 609
 610         @fmts = map {
 611                 exists $known_snapshot_format_aliases{$_} ?
 612                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 613         @fmts = grep {
 614                 exists $known_snapshot_formats{$_} &&
 615                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 616 }
 617
 618 # If it is set to code reference, it is code that it is to be run once per
 619 # request, allowing updating configurations that change with each request,
 620 # while running other code in config file only once.
 621 #
 622 # Otherwise, if it is false then gitweb would process config file only once;
 623 # if it is true then gitweb config would be run for each request.
 624 our $per_request_config = 1;
 625
 626 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 627 sub evaluate_gitweb_config {
 628         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 629         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 630         # die if there are errors parsing config file
 631         if (-e $GITWEB_CONFIG) {
 632                 do $GITWEB_CONFIG;
 633                 die $@ if $@;
 634         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 635                 do $GITWEB_CONFIG_SYSTEM;
 636                 die $@ if $@;
 637         }
 638 }
 639
 640 # Get loadavg of system, to compare against $maxload.
 641 # Currently it requires '/proc/loadavg' present to get loadavg;
 642 # if it is not present it returns 0, which means no load checking.
 643 sub get_loadavg {
 644         if( -e '/proc/loadavg' ){
 645                 open my $fd, '<', '/proc/loadavg'
 646                         or return 0;
 647                 my @load = split(/\s+/, scalar <$fd>);
 648                 close $fd;
 649
 650                 # The first three columns measure CPU and IO utilization of the last one,
 651                 # five, and 10 minute periods.  The fourth column shows the number of
 652                 # currently running processes and the total number of processes in the m/n
 653                 # format.  The last column displays the last process ID used.
 654                 return $load[0] || 0;
 655         }
 656         # additional checks for load average should go here for things that don't export
 657         # /proc/loadavg
 658
 659         return 0;
 660 }
 661
 662 # version of the core git binary
 663 our $git_version;
 664 sub evaluate_git_version {
 665         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 666         $number_of_git_cmds++;
 667 }
 668
 669 sub check_loadavg {
 670         if (defined $maxload && get_loadavg() > $maxload) {
 671                 die_error(503, "The load average on the server is too high");
 672         }
 673 }
 674
 675 # ======================================================================
 676 # input validation and dispatch
 677
 678 # input parameters can be collected from a variety of sources (presently, CGI
 679 # and PATH_INFO), so we define an %input_params hash that collects them all
 680 # together during validation: this allows subsequent uses (e.g. href()) to be
 681 # agnostic of the parameter origin
 682
 683 our %input_params = ();
 684
 685 # input parameters are stored with the long parameter name as key. This will
 686 # also be used in the href subroutine to convert parameters to their CGI
 687 # equivalent, and since the href() usage is the most frequent one, we store
 688 # the name -> CGI key mapping here, instead of the reverse.
 689 #
 690 # XXX: Warning: If you touch this, check the search form for updating,
 691 # too.
 692
 693 our @cgi_param_mapping = (
 694         project => "p",
 695         action => "a",
 696         file_name => "f",
 697         file_parent => "fp",
 698         hash => "h",
 699         hash_parent => "hp",
 700         hash_base => "hb",
 701         hash_parent_base => "hpb",
 702         page => "pg",
 703         order => "o",
 704         searchtext => "s",
 705         searchtype => "st",
 706         snapshot_format => "sf",
 707         extra_options => "opt",
 708         search_use_regexp => "sr",
 709         ctag => "by_tag",
 710         # this must be last entry (for manipulation from JavaScript)
 711         javascript => "js"
 712 );
 713 our %cgi_param_mapping = @cgi_param_mapping;
 714
 715 # we will also need to know the possible actions, for validation
 716 our %actions = (
 717         "blame" => \&git_blame,
 718         "blame_incremental" => \&git_blame_incremental,
 719         "blame_data" => \&git_blame_data,
 720         "blobdiff" => \&git_blobdiff,
 721         "blobdiff_plain" => \&git_blobdiff_plain,
 722         "blob" => \&git_blob,
 723         "blob_plain" => \&git_blob_plain,
 724         "commitdiff" => \&git_commitdiff,
 725         "commitdiff_plain" => \&git_commitdiff_plain,
 726         "commit" => \&git_commit,
 727         "forks" => \&git_forks,
 728         "heads" => \&git_heads,
 729         "history" => \&git_history,
 730         "log" => \&git_log,
 731         "patch" => \&git_patch,
 732         "patches" => \&git_patches,
 733         "remotes" => \&git_remotes,
 734         "rss" => \&git_rss,
 735         "atom" => \&git_atom,
 736         "search" => \&git_search,
 737         "search_help" => \&git_search_help,
 738         "shortlog" => \&git_shortlog,
 739         "summary" => \&git_summary,
 740         "tag" => \&git_tag,
 741         "tags" => \&git_tags,
 742         "tree" => \&git_tree,
 743         "snapshot" => \&git_snapshot,
 744         "object" => \&git_object,
 745         # those below don't need $project
 746         "opml" => \&git_opml,
 747         "project_list" => \&git_project_list,
 748         "project_index" => \&git_project_index,
 749 );
 750
 751 # finally, we have the hash of allowed extra_options for the commands that
 752 # allow them
 753 our %allowed_options = (
 754         "--no-merges" => [ qw(rss atom log shortlog history) ],
 755 );
 756
 757 # fill %input_params with the CGI parameters. All values except for 'opt'
 758 # should be single values, but opt can be an array. We should probably
 759 # build an array of parameters that can be multi-valued, but since for the time
 760 # being it's only this one, we just single it out
 761 sub evaluate_query_params {
 762         our $cgi;
 763
 764         while (my ($name, $symbol) = each %cgi_param_mapping) {
 765                 if ($symbol eq 'opt') {
 766                         $input_params{$name} = [ $cgi->param($symbol) ];
 767                 } else {
 768                         $input_params{$name} = $cgi->param($symbol);
 769                 }
 770         }
 771 }
 772
 773 # now read PATH_INFO and update the parameter list for missing parameters
 774 sub evaluate_path_info {
 775         return if defined $input_params{'project'};
 776         return if !$path_info;
 777         $path_info =~ s,^/+,,;
 778         return if !$path_info;
 779
 780         # find which part of PATH_INFO is project
 781         my $project = $path_info;
 782         $project =~ s,/+$,,;
 783         while ($project && !check_head_link("$projectroot/$project")) {
 784                 $project =~ s,/*[^/]*$,,;
 785         }
 786         return unless $project;
 787         $input_params{'project'} = $project;
 788
 789         # do not change any parameters if an action is given using the query string
 790         return if $input_params{'action'};
 791         $path_info =~ s,^\Q$project\E/*,,;
 792
 793         # next, check if we have an action
 794         my $action = $path_info;
 795         $action =~ s,/.*$,,;
 796         if (exists $actions{$action}) {
 797                 $path_info =~ s,^$action/*,,;
 798                 $input_params{'action'} = $action;
 799         }
 800
 801         # list of actions that want hash_base instead of hash, but can have no
 802         # pathname (f) parameter
 803         my @wants_base = (
 804                 'tree',
 805                 'history',
 806         );
 807
 808         # we want to catch, among others
 809         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 810         my ($parentrefname, $parentpathname, $refname, $pathname) =
 811                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 812
 813         # first, analyze the 'current' part
 814         if (defined $pathname) {
 815                 # we got "branch:filename" or "branch:dir/"
 816                 # we could use git_get_type(branch:pathname), but:
 817                 # - it needs $git_dir
 818                 # - it does a git() call
 819                 # - the convention of terminating directories with a slash
 820                 #   makes it superfluous
 821                 # - embedding the action in the PATH_INFO would make it even
 822                 #   more superfluous
 823                 $pathname =~ s,^/+,,;
 824                 if (!$pathname || substr($pathname, -1) eq "/") {
 825                         $input_params{'action'} ||= "tree";
 826                         $pathname =~ s,/$,,;
 827                 } else {
 828                         # the default action depends on whether we had parent info
 829                         # or not
 830                         if ($parentrefname) {
 831                                 $input_params{'action'} ||= "blobdiff_plain";
 832                         } else {
 833                                 $input_params{'action'} ||= "blob_plain";
 834                         }
 835                 }
 836                 $input_params{'hash_base'} ||= $refname;
 837                 $input_params{'file_name'} ||= $pathname;
 838         } elsif (defined $refname) {
 839                 # we got "branch". In this case we have to choose if we have to
 840                 # set hash or hash_base.
 841                 #
 842                 # Most of the actions without a pathname only want hash to be
 843                 # set, except for the ones specified in @wants_base that want
 844                 # hash_base instead. It should also be noted that hand-crafted
 845                 # links having 'history' as an action and no pathname or hash
 846                 # set will fail, but that happens regardless of PATH_INFO.
 847                 if (defined $parentrefname) {
 848                         # if there is parent let the default be 'shortlog' action
 849                         # (for http://git.example.com/repo.git/A..B links); if there
 850                         # is no parent, dispatch will detect type of object and set
 851                         # action appropriately if required (if action is not set)
 852                         $input_params{'action'} ||= "shortlog";
 853                 }
 854                 if ($input_params{'action'} &&
 855                     grep { $_ eq $input_params{'action'} } @wants_base) {
 856                         $input_params{'hash_base'} ||= $refname;
 857                 } else {
 858                         $input_params{'hash'} ||= $refname;
 859                 }
 860         }
 861
 862         # next, handle the 'parent' part, if present
 863         if (defined $parentrefname) {
 864                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 865                 # someproject/blobdiff/oldrev..newrev:/filename
 866                 if ($parentpathname) {
 867                         $parentpathname =~ s,^/+,,;
 868                         $parentpathname =~ s,/$,,;
 869                         $input_params{'file_parent'} ||= $parentpathname;
 870                 } else {
 871                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 872                 }
 873                 # we assume that hash_parent_base is wanted if a path was specified,
 874                 # or if the action wants hash_base instead of hash
 875                 if (defined $input_params{'file_parent'} ||
 876                         grep { $_ eq $input_params{'action'} } @wants_base) {
 877                         $input_params{'hash_parent_base'} ||= $parentrefname;
 878                 } else {
 879                         $input_params{'hash_parent'} ||= $parentrefname;
 880                 }
 881         }
 882
 883         # for the snapshot action, we allow URLs in the form
 884         # $project/snapshot/$hash.ext
 885         # where .ext determines the snapshot and gets removed from the
 886         # passed $refname to provide the $hash.
 887         #
 888         # To be able to tell that $refname includes the format extension, we
 889         # require the following two conditions to be satisfied:
 890         # - the hash input parameter MUST have been set from the $refname part
 891         #   of the URL (i.e. they must be equal)
 892         # - the snapshot format MUST NOT have been defined already (e.g. from
 893         #   CGI parameter sf)
 894         # It's also useless to try any matching unless $refname has a dot,
 895         # so we check for that too
 896         if (defined $input_params{'action'} &&
 897                 $input_params{'action'} eq 'snapshot' &&
 898                 defined $refname && index($refname, '.') != -1 &&
 899                 $refname eq $input_params{'hash'} &&
 900                 !defined $input_params{'snapshot_format'}) {
 901                 # We loop over the known snapshot formats, checking for
 902                 # extensions. Allowed extensions are both the defined suffix
 903                 # (which includes the initial dot already) and the snapshot
 904                 # format key itself, with a prepended dot
 905                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 906                         my $hash = $refname;
 907                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 908                                 next;
 909                         }
 910                         my $sfx = $1;
 911                         # a valid suffix was found, so set the snapshot format
 912                         # and reset the hash parameter
 913                         $input_params{'snapshot_format'} = $fmt;
 914                         $input_params{'hash'} = $hash;
 915                         # we also set the format suffix to the one requested
 916                         # in the URL: this way a request for e.g. .tgz returns
 917                         # a .tgz instead of a .tar.gz
 918                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 919                         last;
 920                 }
 921         }
 922 }
 923
 924 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 925      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 926      $searchtext, $search_regexp);
 927 sub evaluate_and_validate_params {
 928         our $action = $input_params{'action'};
 929         if (defined $action) {
 930                 if (!validate_action($action)) {
 931                         die_error(400, "Invalid action parameter");
 932                 }
 933         }
 934
 935         # parameters which are pathnames
 936         our $project = $input_params{'project'};
 937         if (defined $project) {
 938                 if (!validate_project($project)) {
 939                         undef $project;
 940                         die_error(404, "No such project");
 941                 }
 942         }
 943
 944         our $file_name = $input_params{'file_name'};
 945         if (defined $file_name) {
 946                 if (!validate_pathname($file_name)) {
 947                         die_error(400, "Invalid file parameter");
 948                 }
 949         }
 950
 951         our $file_parent = $input_params{'file_parent'};
 952         if (defined $file_parent) {
 953                 if (!validate_pathname($file_parent)) {
 954                         die_error(400, "Invalid file parent parameter");
 955                 }
 956         }
 957
 958         # parameters which are refnames
 959         our $hash = $input_params{'hash'};
 960         if (defined $hash) {
 961                 if (!validate_refname($hash)) {
 962                         die_error(400, "Invalid hash parameter");
 963                 }
 964         }
 965
 966         our $hash_parent = $input_params{'hash_parent'};
 967         if (defined $hash_parent) {
 968                 if (!validate_refname($hash_parent)) {
 969                         die_error(400, "Invalid hash parent parameter");
 970                 }
 971         }
 972
 973         our $hash_base = $input_params{'hash_base'};
 974         if (defined $hash_base) {
 975                 if (!validate_refname($hash_base)) {
 976                         die_error(400, "Invalid hash base parameter");
 977                 }
 978         }
 979
 980         our @extra_options = @{$input_params{'extra_options'}};
 981         # @extra_options is always defined, since it can only be (currently) set from
 982         # CGI, and $cgi->param() returns the empty array in array context if the param
 983         # is not set
 984         foreach my $opt (@extra_options) {
 985                 if (not exists $allowed_options{$opt}) {
 986                         die_error(400, "Invalid option parameter");
 987                 }
 988                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 989                         die_error(400, "Invalid option parameter for this action");
 990                 }
 991         }
 992
 993         our $hash_parent_base = $input_params{'hash_parent_base'};
 994         if (defined $hash_parent_base) {
 995                 if (!validate_refname($hash_parent_base)) {
 996                         die_error(400, "Invalid hash parent base parameter");
 997                 }
 998         }
 999
1000         # other parameters
1001         our $page = $input_params{'page'};
1002         if (defined $page) {
1003                 if ($page =~ m/[^0-9]/) {
1004                         die_error(400, "Invalid page parameter");
1005                 }
1006         }
1007
1008         our $searchtype = $input_params{'searchtype'};
1009         if (defined $searchtype) {
1010                 if ($searchtype =~ m/[^a-z]/) {
1011                         die_error(400, "Invalid searchtype parameter");
1012                 }
1013         }
1014
1015         our $search_use_regexp = $input_params{'search_use_regexp'};
1016
1017         our $searchtext = $input_params{'searchtext'};
1018         our $search_regexp;
1019         if (defined $searchtext) {
1020                 if (length($searchtext) < 2) {
1021                         die_error(403, "At least two characters are required for search parameter");
1022                 }
1023                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1024         }
1025 }
1026
1027 # path to the current git repository
1028 our $git_dir;
1029 sub evaluate_git_dir {
1030         our $git_dir = "$projectroot/$project" if $project;
1031 }
1032
1033 our (@snapshot_fmts, $git_avatar);
1034 sub configure_gitweb_features {
1035         # list of supported snapshot formats
1036         our @snapshot_fmts = gitweb_get_feature('snapshot');
1037         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1038
1039         # check that the avatar feature is set to a known provider name,
1040         # and for each provider check if the dependencies are satisfied.
1041         # if the provider name is invalid or the dependencies are not met,
1042         # reset $git_avatar to the empty string.
1043         our ($git_avatar) = gitweb_get_feature('avatar');
1044         if ($git_avatar eq 'gravatar') {
1045                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1046         } elsif ($git_avatar eq 'picon') {
1047                 # no dependencies
1048         } else {
1049                 $git_avatar = '';
1050         }
1051 }
1052
1053 # custom error handler: 'die <message>' is Internal Server Error
1054 sub handle_errors_html {
1055         my $msg = shift; # it is already HTML escaped
1056
1057         # to avoid infinite loop where error occurs in die_error,
1058         # change handler to default handler, disabling handle_errors_html
1059         set_message("Error occured when inside die_error:\n$msg");
1060
1061         # you cannot jump out of die_error when called as error handler;
1062         # the subroutine set via CGI::Carp::set_message is called _after_
1063         # HTTP headers are already written, so it cannot write them itself
1064         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1065 }
1066 set_message(\&handle_errors_html);
1067
1068 # dispatch
1069 sub dispatch {
1070         if (!defined $action) {
1071                 if (defined $hash) {
1072                         $action = git_get_type($hash);
1073                 } elsif (defined $hash_base && defined $file_name) {
1074                         $action = git_get_type("$hash_base:$file_name");
1075                 } elsif (defined $project) {
1076                         $action = 'summary';
1077                 } else {
1078                         $action = 'project_list';
1079                 }
1080         }
1081         if (!defined($actions{$action})) {
1082                 die_error(400, "Unknown action");
1083         }
1084         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1085             !$project) {
1086                 die_error(400, "Project needed");
1087         }
1088         $actions{$action}->();
1089 }
1090
1091 sub reset_timer {
1092         our $t0 = [ gettimeofday() ]
1093                 if defined $t0;
1094         our $number_of_git_cmds = 0;
1095 }
1096
1097 our $first_request = 1;
1098 sub run_request {
1099         reset_timer();
1100
1101         evaluate_uri();
1102         if ($first_request) {
1103                 evaluate_gitweb_config();
1104                 evaluate_git_version();
1105         }
1106         if ($per_request_config) {
1107                 if (ref($per_request_config) eq 'CODE') {
1108                         $per_request_config->();
1109                 } elsif (!$first_request) {
1110                         evaluate_gitweb_config();
1111                 }
1112         }
1113         check_loadavg();
1114
1115         # $projectroot and $projects_list might be set in gitweb config file
1116         $projects_list ||= $projectroot;
1117
1118         evaluate_query_params();
1119         evaluate_path_info();
1120         evaluate_and_validate_params();
1121         evaluate_git_dir();
1122
1123         configure_gitweb_features();
1124
1125         dispatch();
1126 }
1127
1128 our $is_last_request = sub { 1 };
1129 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1130 our $CGI = 'CGI';
1131 our $cgi;
1132 sub configure_as_fcgi {
1133         require CGI::Fast;
1134         our $CGI = 'CGI::Fast';
1135
1136         my $request_number = 0;
1137         # let each child service 100 requests
1138         our $is_last_request = sub { ++$request_number > 100 };
1139 }
1140 sub evaluate_argv {
1141         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1142         configure_as_fcgi()
1143                 if $script_name =~ /\.fcgi$/;
1144
1145         return unless (@ARGV);
1146
1147         require Getopt::Long;
1148         Getopt::Long::GetOptions(
1149                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1150                 'nproc|n=i' => sub {
1151                         my ($arg, $val) = @_;
1152                         return unless eval { require FCGI::ProcManager; 1; };
1153                         my $proc_manager = FCGI::ProcManager->new({
1154                                 n_processes => $val,
1155                         });
1156                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1157                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1158                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1159                 },
1160         );
1161 }
1162
1163 sub run {
1164         evaluate_argv();
1165
1166         $first_request = 1;
1167         $pre_listen_hook->()
1168                 if $pre_listen_hook;
1169
1170  REQUEST:
1171         while ($cgi = $CGI->new()) {
1172                 $pre_dispatch_hook->()
1173                         if $pre_dispatch_hook;
1174
1175                 run_request();
1176
1177                 $post_dispatch_hook->()
1178                         if $post_dispatch_hook;
1179                 $first_request = 0;
1180
1181                 last REQUEST if ($is_last_request->());
1182         }
1183
1184  DONE_GITWEB:
1185         1;
1186 }
1187
1188 run();
1189
1190 if (defined caller) {
1191         # wrapped in a subroutine processing requests,
1192         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1193         return;
1194 } else {
1195         # pure CGI script, serving single request
1196         exit;
1197 }
1198
1199 ## ======================================================================
1200 ## action links
1201
1202 # possible values of extra options
1203 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1204 # -replay => 1      - start from a current view (replay with modifications)
1205 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1206 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1207 sub href {
1208         my %params = @_;
1209         # default is to use -absolute url() i.e. $my_uri
1210         my $href = $params{-full} ? $my_url : $my_uri;
1211
1212         # implicit -replay, must be first of implicit params
1213         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1214
1215         $params{'project'} = $project unless exists $params{'project'};
1216
1217         if ($params{-replay}) {
1218                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1219                         if (!exists $params{$name}) {
1220                                 $params{$name} = $input_params{$name};
1221                         }
1222                 }
1223         }
1224
1225         my $use_pathinfo = gitweb_check_feature('pathinfo');
1226         if (defined $params{'project'} &&
1227             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1228                 # try to put as many parameters as possible in PATH_INFO:
1229                 #   - project name
1230                 #   - action
1231                 #   - hash_parent or hash_parent_base:/file_parent
1232                 #   - hash or hash_base:/filename
1233                 #   - the snapshot_format as an appropriate suffix
1234
1235                 # When the script is the root DirectoryIndex for the domain,
1236                 # $href here would be something like http://gitweb.example.com/
1237                 # Thus, we strip any trailing / from $href, to spare us double
1238                 # slashes in the final URL
1239                 $href =~ s,/$,,;
1240
1241                 # Then add the project name, if present
1242                 $href .= "/".esc_path_info($params{'project'});
1243                 delete $params{'project'};
1244
1245                 # since we destructively absorb parameters, we keep this
1246                 # boolean that remembers if we're handling a snapshot
1247                 my $is_snapshot = $params{'action'} eq 'snapshot';
1248
1249                 # Summary just uses the project path URL, any other action is
1250                 # added to the URL
1251                 if (defined $params{'action'}) {
1252                         $href .= "/".esc_path_info($params{'action'})
1253                                 unless $params{'action'} eq 'summary';
1254                         delete $params{'action'};
1255                 }
1256
1257                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1258                 # stripping nonexistent or useless pieces
1259                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1260                         || $params{'hash_parent'} || $params{'hash'});
1261                 if (defined $params{'hash_base'}) {
1262                         if (defined $params{'hash_parent_base'}) {
1263                                 $href .= esc_path_info($params{'hash_parent_base'});
1264                                 # skip the file_parent if it's the same as the file_name
1265                                 if (defined $params{'file_parent'}) {
1266                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1267                                                 delete $params{'file_parent'};
1268                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1269                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1270                                                 delete $params{'file_parent'};
1271                                         }
1272                                 }
1273                                 $href .= "..";
1274                                 delete $params{'hash_parent'};
1275                                 delete $params{'hash_parent_base'};
1276                         } elsif (defined $params{'hash_parent'}) {
1277                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1278                                 delete $params{'hash_parent'};
1279                         }
1280
1281                         $href .= esc_path_info($params{'hash_base'});
1282                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1283                                 $href .= ":/".esc_path_info($params{'file_name'});
1284                                 delete $params{'file_name'};
1285                         }
1286                         delete $params{'hash'};
1287                         delete $params{'hash_base'};
1288                 } elsif (defined $params{'hash'}) {
1289                         $href .= esc_path_info($params{'hash'});
1290                         delete $params{'hash'};
1291                 }
1292
1293                 # If the action was a snapshot, we can absorb the
1294                 # snapshot_format parameter too
1295                 if ($is_snapshot) {
1296                         my $fmt = $params{'snapshot_format'};
1297                         # snapshot_format should always be defined when href()
1298                         # is called, but just in case some code forgets, we
1299                         # fall back to the default
1300                         $fmt ||= $snapshot_fmts[0];
1301                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1302                         delete $params{'snapshot_format'};
1303                 }
1304         }
1305
1306         # now encode the parameters explicitly
1307         my @result = ();
1308         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1309                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1310                 if (defined $params{$name}) {
1311                         if (ref($params{$name}) eq "ARRAY") {
1312                                 foreach my $par (@{$params{$name}}) {
1313                                         push @result, $symbol . "=" . esc_param($par);
1314                                 }
1315                         } else {
1316                                 push @result, $symbol . "=" . esc_param($params{$name});
1317                         }
1318                 }
1319         }
1320         $href .= "?" . join(';', @result) if scalar @result;
1321
1322         # final transformation: trailing spaces must be escaped (URI-encoded)
1323         $href =~ s/(\s+)$/CGI::escape($1)/e;
1324
1325         if ($params{-anchor}) {
1326                 $href .= "#".esc_param($params{-anchor});
1327         }
1328
1329         return $href;
1330 }
1331
1332
1333 ## ======================================================================
1334 ## validation, quoting/unquoting and escaping
1335
1336 sub validate_action {
1337         my $input = shift || return undef;
1338         return undef unless exists $actions{$input};
1339         return $input;
1340 }
1341
1342 sub validate_project {
1343         my $input = shift || return undef;
1344         if (!validate_pathname($input) ||
1345                 !(-d "$projectroot/$input") ||
1346                 !check_export_ok("$projectroot/$input") ||
1347                 ($strict_export && !project_in_list($input))) {
1348                 return undef;
1349         } else {
1350                 return $input;
1351         }
1352 }
1353
1354 sub validate_pathname {
1355         my $input = shift || return undef;
1356
1357         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1358         # at the beginning, at the end, and between slashes.
1359         # also this catches doubled slashes
1360         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1361                 return undef;
1362         }
1363         # no null characters
1364         if ($input =~ m!\0!) {
1365                 return undef;
1366         }
1367         return $input;
1368 }
1369
1370 sub validate_refname {
1371         my $input = shift || return undef;
1372
1373         # textual hashes are O.K.
1374         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1375                 return $input;
1376         }
1377         # it must be correct pathname
1378         $input = validate_pathname($input)
1379                 or return undef;
1380         # restrictions on ref name according to git-check-ref-format
1381         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1382                 return undef;
1383         }
1384         return $input;
1385 }
1386
1387 # decode sequences of octets in utf8 into Perl's internal form,
1388 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1389 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1390 sub to_utf8 {
1391         my $str = shift;
1392         return undef unless defined $str;
1393         if (utf8::valid($str)) {
1394                 utf8::decode($str);
1395                 return $str;
1396         } else {
1397                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1398         }
1399 }
1400
1401 # quote unsafe chars, but keep the slash, even when it's not
1402 # correct, but quoted slashes look too horrible in bookmarks
1403 sub esc_param {
1404         my $str = shift;
1405         return undef unless defined $str;
1406         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1407         $str =~ s/ /\+/g;
1408         return $str;
1409 }
1410
1411 # the quoting rules for path_info fragment are slightly different
1412 sub esc_path_info {
1413         my $str = shift;
1414         return undef unless defined $str;
1415
1416         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1417         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1418
1419         return $str;
1420 }
1421
1422 # quote unsafe chars in whole URL, so some characters cannot be quoted
1423 sub esc_url {
1424         my $str = shift;
1425         return undef unless defined $str;
1426         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1427         $str =~ s/ /\+/g;
1428         return $str;
1429 }
1430
1431 # quote unsafe characters in HTML attributes
1432 sub esc_attr {
1433
1434         # for XHTML conformance escaping '"' to '&quot;' is not enough
1435         return esc_html(@_);
1436 }
1437
1438 # replace invalid utf8 character with SUBSTITUTION sequence
1439 sub esc_html {
1440         my $str = shift;
1441         my %opts = @_;
1442
1443         return undef unless defined $str;
1444
1445         $str = to_utf8($str);
1446         $str = $cgi->escapeHTML($str);
1447         if ($opts{'-nbsp'}) {
1448                 $str =~ s/ /&nbsp;/g;
1449         }
1450         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1451         return $str;
1452 }
1453
1454 # quote control characters and escape filename to HTML
1455 sub esc_path {
1456         my $str = shift;
1457         my %opts = @_;
1458
1459         return undef unless defined $str;
1460
1461         $str = to_utf8($str);
1462         $str = $cgi->escapeHTML($str);
1463         if ($opts{'-nbsp'}) {
1464                 $str =~ s/ /&nbsp;/g;
1465         }
1466         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1467         return $str;
1468 }
1469
1470 # Make control characters "printable", using character escape codes (CEC)
1471 sub quot_cec {
1472         my $cntrl = shift;
1473         my %opts = @_;
1474         my %es = ( # character escape codes, aka escape sequences
1475                 "\t" => '\t',   # tab            (HT)
1476                 "\n" => '\n',   # line feed      (LF)
1477                 "\r" => '\r',   # carrige return (CR)
1478                 "\f" => '\f',   # form feed      (FF)
1479                 "\b" => '\b',   # backspace      (BS)
1480                 "\a" => '\a',   # alarm (bell)   (BEL)
1481                 "\e" => '\e',   # escape         (ESC)
1482                 "\013" => '\v', # vertical tab   (VT)
1483                 "\000" => '\0', # nul character  (NUL)
1484         );
1485         my $chr = ( (exists $es{$cntrl})
1486                     ? $es{$cntrl}
1487                     : sprintf('\%2x', ord($cntrl)) );
1488         if ($opts{-nohtml}) {
1489                 return $chr;
1490         } else {
1491                 return "<span class=\"cntrl\">$chr</span>";
1492         }
1493 }
1494
1495 # Alternatively use unicode control pictures codepoints,
1496 # Unicode "printable representation" (PR)
1497 sub quot_upr {
1498         my $cntrl = shift;
1499         my %opts = @_;
1500
1501         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1502         if ($opts{-nohtml}) {
1503                 return $chr;
1504         } else {
1505                 return "<span class=\"cntrl\">$chr</span>";
1506         }
1507 }
1508
1509 # git may return quoted and escaped filenames
1510 sub unquote {
1511         my $str = shift;
1512
1513         sub unq {
1514                 my $seq = shift;
1515                 my %es = ( # character escape codes, aka escape sequences
1516                         't' => "\t",   # tab            (HT, TAB)
1517                         'n' => "\n",   # newline        (NL)
1518                         'r' => "\r",   # return         (CR)
1519                         'f' => "\f",   # form feed      (FF)
1520                         'b' => "\b",   # backspace      (BS)
1521                         'a' => "\a",   # alarm (bell)   (BEL)
1522                         'e' => "\e",   # escape         (ESC)
1523                         'v' => "\013", # vertical tab   (VT)
1524                 );
1525
1526                 if ($seq =~ m/^[0-7]{1,3}$/) {
1527                         # octal char sequence
1528                         return chr(oct($seq));
1529                 } elsif (exists $es{$seq}) {
1530                         # C escape sequence, aka character escape code
1531                         return $es{$seq};
1532                 }
1533                 # quoted ordinary character
1534                 return $seq;
1535         }
1536
1537         if ($str =~ m/^"(.*)"$/) {
1538                 # needs unquoting
1539                 $str = $1;
1540                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1541         }
1542         return $str;
1543 }
1544
1545 # escape tabs (convert tabs to spaces)
1546 sub untabify {
1547         my $line = shift;
1548
1549         while ((my $pos = index($line, "\t")) != -1) {
1550                 if (my $count = (8 - ($pos % 8))) {
1551                         my $spaces = ' ' x $count;
1552                         $line =~ s/\t/$spaces/;
1553                 }
1554         }
1555
1556         return $line;
1557 }
1558
1559 sub project_in_list {
1560         my $project = shift;
1561         my @list = git_get_projects_list();
1562         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1563 }
1564
1565 ## ----------------------------------------------------------------------
1566 ## HTML aware string manipulation
1567
1568 # Try to chop given string on a word boundary between position
1569 # $len and $len+$add_len. If there is no word boundary there,
1570 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1571 # (marking chopped part) would be longer than given string.
1572 sub chop_str {
1573         my $str = shift;
1574         my $len = shift;
1575         my $add_len = shift || 10;
1576         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1577
1578         # Make sure perl knows it is utf8 encoded so we don't
1579         # cut in the middle of a utf8 multibyte char.
1580         $str = to_utf8($str);
1581
1582         # allow only $len chars, but don't cut a word if it would fit in $add_len
1583         # if it doesn't fit, cut it if it's still longer than the dots we would add
1584         # remove chopped character entities entirely
1585
1586         # when chopping in the middle, distribute $len into left and right part
1587         # return early if chopping wouldn't make string shorter
1588         if ($where eq 'center') {
1589                 return $str if ($len + 5 >= length($str)); # filler is length 5
1590                 $len = int($len/2);
1591         } else {
1592                 return $str if ($len + 4 >= length($str)); # filler is length 4
1593         }
1594
1595         # regexps: ending and beginning with word part up to $add_len
1596         my $endre = qr/.{$len}\w{0,$add_len}/;
1597         my $begre = qr/\w{0,$add_len}.{$len}/;
1598
1599         if ($where eq 'left') {
1600                 $str =~ m/^(.*?)($begre)$/;
1601                 my ($lead, $body) = ($1, $2);
1602                 if (length($lead) > 4) {
1603                         $lead = " ...";
1604                 }
1605                 return "$lead$body";
1606
1607         } elsif ($where eq 'center') {
1608                 $str =~ m/^($endre)(.*)$/;
1609                 my ($left, $str)  = ($1, $2);
1610                 $str =~ m/^(.*?)($begre)$/;
1611                 my ($mid, $right) = ($1, $2);
1612                 if (length($mid) > 5) {
1613                         $mid = " ... ";
1614                 }
1615                 return "$left$mid$right";
1616
1617         } else {
1618                 $str =~ m/^($endre)(.*)$/;
1619                 my $body = $1;
1620                 my $tail = $2;
1621                 if (length($tail) > 4) {
1622                         $tail = "... ";
1623                 }
1624                 return "$body$tail";
1625         }
1626 }
1627
1628 # takes the same arguments as chop_str, but also wraps a <span> around the
1629 # result with a title attribute if it does get chopped. Additionally, the
1630 # string is HTML-escaped.
1631 sub chop_and_escape_str {
1632         my ($str) = @_;
1633
1634         my $chopped = chop_str(@_);
1635         if ($chopped eq $str) {
1636                 return esc_html($chopped);
1637         } else {
1638                 $str =~ s/[[:cntrl:]]/?/g;
1639                 return $cgi->span({-title=>$str}, esc_html($chopped));
1640         }
1641 }
1642
1643 ## ----------------------------------------------------------------------
1644 ## functions returning short strings
1645
1646 # CSS class for given age value (in seconds)
1647 sub age_class {
1648         my $age = shift;
1649
1650         if (!defined $age) {
1651                 return "noage";
1652         } elsif ($age < 60*60*2) {
1653                 return "age0";
1654         } elsif ($age < 60*60*24*2) {
1655                 return "age1";
1656         } else {
1657                 return "age2";
1658         }
1659 }
1660
1661 # convert age in seconds to "nn units ago" string
1662 sub age_string {
1663         my $age = shift;
1664         my $age_str;
1665
1666         if ($age > 60*60*24*365*2) {
1667                 $age_str = (int $age/60/60/24/365);
1668                 $age_str .= " years ago";
1669         } elsif ($age > 60*60*24*(365/12)*2) {
1670                 $age_str = int $age/60/60/24/(365/12);
1671                 $age_str .= " months ago";
1672         } elsif ($age > 60*60*24*7*2) {
1673                 $age_str = int $age/60/60/24/7;
1674                 $age_str .= " weeks ago";
1675         } elsif ($age > 60*60*24*2) {
1676                 $age_str = int $age/60/60/24;
1677                 $age_str .= " days ago";
1678         } elsif ($age > 60*60*2) {
1679                 $age_str = int $age/60/60;
1680                 $age_str .= " hours ago";
1681         } elsif ($age > 60*2) {
1682                 $age_str = int $age/60;
1683                 $age_str .= " min ago";
1684         } elsif ($age > 2) {
1685                 $age_str = int $age;
1686                 $age_str .= " sec ago";
1687         } else {
1688                 $age_str .= " right now";
1689         }
1690         return $age_str;
1691 }
1692
1693 use constant {
1694         S_IFINVALID => 0030000,
1695         S_IFGITLINK => 0160000,
1696 };
1697
1698 # submodule/subproject, a commit object reference
1699 sub S_ISGITLINK {
1700         my $mode = shift;
1701
1702         return (($mode & S_IFMT) == S_IFGITLINK)
1703 }
1704
1705 # convert file mode in octal to symbolic file mode string
1706 sub mode_str {
1707         my $mode = oct shift;
1708
1709         if (S_ISGITLINK($mode)) {
1710                 return 'm---------';
1711         } elsif (S_ISDIR($mode & S_IFMT)) {
1712                 return 'drwxr-xr-x';
1713         } elsif (S_ISLNK($mode)) {
1714                 return 'lrwxrwxrwx';
1715         } elsif (S_ISREG($mode)) {
1716                 # git cares only about the executable bit
1717                 if ($mode & S_IXUSR) {
1718                         return '-rwxr-xr-x';
1719                 } else {
1720                         return '-rw-r--r--';
1721                 };
1722         } else {
1723                 return '----------';
1724         }
1725 }
1726
1727 # convert file mode in octal to file type string
1728 sub file_type {
1729         my $mode = shift;
1730
1731         if ($mode !~ m/^[0-7]+$/) {
1732                 return $mode;
1733         } else {
1734                 $mode = oct $mode;
1735         }
1736
1737         if (S_ISGITLINK($mode)) {
1738                 return "submodule";
1739         } elsif (S_ISDIR($mode & S_IFMT)) {
1740                 return "directory";
1741         } elsif (S_ISLNK($mode)) {
1742                 return "symlink";
1743         } elsif (S_ISREG($mode)) {
1744                 return "file";
1745         } else {
1746                 return "unknown";
1747         }
1748 }
1749
1750 # convert file mode in octal to file type description string
1751 sub file_type_long {
1752         my $mode = shift;
1753
1754         if ($mode !~ m/^[0-7]+$/) {
1755                 return $mode;
1756         } else {
1757                 $mode = oct $mode;
1758         }
1759
1760         if (S_ISGITLINK($mode)) {
1761                 return "submodule";
1762         } elsif (S_ISDIR($mode & S_IFMT)) {
1763                 return "directory";
1764         } elsif (S_ISLNK($mode)) {
1765                 return "symlink";
1766         } elsif (S_ISREG($mode)) {
1767                 if ($mode & S_IXUSR) {
1768                         return "executable";
1769                 } else {
1770                         return "file";
1771                 };
1772         } else {
1773                 return "unknown";
1774         }
1775 }
1776
1777
1778 ## ----------------------------------------------------------------------
1779 ## functions returning short HTML fragments, or transforming HTML fragments
1780 ## which don't belong to other sections
1781
1782 # format line of commit message.
1783 sub format_log_line_html {
1784         my $line = shift;
1785
1786         $line = esc_html($line, -nbsp=>1);
1787         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1788                 $cgi->a({-href => href(action=>"object", hash=>$1),
1789                                         -class => "text"}, $1);
1790         }eg;
1791
1792         return $line;
1793 }
1794
1795 # format marker of refs pointing to given object
1796
1797 # the destination action is chosen based on object type and current context:
1798 # - for annotated tags, we choose the tag view unless it's the current view
1799 #   already, in which case we go to shortlog view
1800 # - for other refs, we keep the current view if we're in history, shortlog or
1801 #   log view, and select shortlog otherwise
1802 sub format_ref_marker {
1803         my ($refs, $id) = @_;
1804         my $markers = '';
1805
1806         if (defined $refs->{$id}) {
1807                 foreach my $ref (@{$refs->{$id}}) {
1808                         # this code exploits the fact that non-lightweight tags are the
1809                         # only indirect objects, and that they are the only objects for which
1810                         # we want to use tag instead of shortlog as action
1811                         my ($type, $name) = qw();
1812                         my $indirect = ($ref =~ s/\^\{\}$//);
1813                         # e.g. tags/v2.6.11 or heads/next
1814                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1815                                 $type = $1;
1816                                 $name = $2;
1817                         } else {
1818                                 $type = "ref";
1819                                 $name = $ref;
1820                         }
1821
1822                         my $class = $type;
1823                         $class .= " indirect" if $indirect;
1824
1825                         my $dest_action = "shortlog";
1826
1827                         if ($indirect) {
1828                                 $dest_action = "tag" unless $action eq "tag";
1829                         } elsif ($action =~ /^(history|(short)?log)$/) {
1830                                 $dest_action = $action;
1831                         }
1832
1833                         my $dest = "";
1834                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1835                         $dest .= $ref;
1836
1837                         my $link = $cgi->a({
1838                                 -href => href(
1839                                         action=>$dest_action,
1840                                         hash=>$dest
1841                                 )}, $name);
1842
1843                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1844                                 $link . "</span>";
1845                 }
1846         }
1847
1848         if ($markers) {
1849                 return ' <span class="refs">'. $markers . '</span>';
1850         } else {
1851                 return "";
1852         }
1853 }
1854
1855 # format, perhaps shortened and with markers, title line
1856 sub format_subject_html {
1857         my ($long, $short, $href, $extra) = @_;
1858         $extra = '' unless defined($extra);
1859
1860         if (length($short) < length($long)) {
1861                 $long =~ s/[[:cntrl:]]/?/g;
1862                 return $cgi->a({-href => $href, -class => "list subject",
1863                                 -title => to_utf8($long)},
1864                        esc_html($short)) . $extra;
1865         } else {
1866                 return $cgi->a({-href => $href, -class => "list subject"},
1867                        esc_html($long)) . $extra;
1868         }
1869 }
1870
1871 # Rather than recomputing the url for an email multiple times, we cache it
1872 # after the first hit. This gives a visible benefit in views where the avatar
1873 # for the same email is used repeatedly (e.g. shortlog).
1874 # The cache is shared by all avatar engines (currently gravatar only), which
1875 # are free to use it as preferred. Since only one avatar engine is used for any
1876 # given page, there's no risk for cache conflicts.
1877 our %avatar_cache = ();
1878
1879 # Compute the picon url for a given email, by using the picon search service over at
1880 # http://www.cs.indiana.edu/picons/search.html
1881 sub picon_url {
1882         my $email = lc shift;
1883         if (!$avatar_cache{$email}) {
1884                 my ($user, $domain) = split('@', $email);
1885                 $avatar_cache{$email} =
1886                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1887                         "$domain/$user/" .
1888                         "users+domains+unknown/up/single";
1889         }
1890         return $avatar_cache{$email};
1891 }
1892
1893 # Compute the gravatar url for a given email, if it's not in the cache already.
1894 # Gravatar stores only the part of the URL before the size, since that's the
1895 # one computationally more expensive. This also allows reuse of the cache for
1896 # different sizes (for this particular engine).
1897 sub gravatar_url {
1898         my $email = lc shift;
1899         my $size = shift;
1900         $avatar_cache{$email} ||=
1901                 "http://www.gravatar.com/avatar/" .
1902                         Digest::MD5::md5_hex($email) . "?s=";
1903         return $avatar_cache{$email} . $size;
1904 }
1905
1906 # Insert an avatar for the given $email at the given $size if the feature
1907 # is enabled.
1908 sub git_get_avatar {
1909         my ($email, %opts) = @_;
1910         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1911         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1912         $opts{-size} ||= 'default';
1913         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1914         my $url = "";
1915         if ($git_avatar eq 'gravatar') {
1916                 $url = gravatar_url($email, $size);
1917         } elsif ($git_avatar eq 'picon') {
1918                 $url = picon_url($email);
1919         }
1920         # Other providers can be added by extending the if chain, defining $url
1921         # as needed. If no variant puts something in $url, we assume avatars
1922         # are completely disabled/unavailable.
1923         if ($url) {
1924                 return $pre_white .
1925                        "<img width=\"$size\" " .
1926                             "class=\"avatar\" " .
1927                             "src=\"".esc_url($url)."\" " .
1928                             "alt=\"\" " .
1929                        "/>" . $post_white;
1930         } else {
1931                 return "";
1932         }
1933 }
1934
1935 sub format_search_author {
1936         my ($author, $searchtype, $displaytext) = @_;
1937         my $have_search = gitweb_check_feature('search');
1938
1939         if ($have_search) {
1940                 my $performed = "";
1941                 if ($searchtype eq 'author') {
1942                         $performed = "authored";
1943                 } elsif ($searchtype eq 'committer') {
1944                         $performed = "committed";
1945                 }
1946
1947                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1948                                 searchtext=>$author,
1949                                 searchtype=>$searchtype), class=>"list",
1950                                 title=>"Search for commits $performed by $author"},
1951                                 $displaytext);
1952
1953         } else {
1954                 return $displaytext;
1955         }
1956 }
1957
1958 # format the author name of the given commit with the given tag
1959 # the author name is chopped and escaped according to the other
1960 # optional parameters (see chop_str).
1961 sub format_author_html {
1962         my $tag = shift;
1963         my $co = shift;
1964         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1965         return "<$tag class=\"author\">" .
1966                format_search_author($co->{'author_name'}, "author",
1967                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1968                        $author) .
1969                "</$tag>";
1970 }
1971
1972 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1973 sub format_git_diff_header_line {
1974         my $line = shift;
1975         my $diffinfo = shift;
1976         my ($from, $to) = @_;
1977
1978         if ($diffinfo->{'nparents'}) {
1979                 # combined diff
1980                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1981                 if ($to->{'href'}) {
1982                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1983                                          esc_path($to->{'file'}));
1984                 } else { # file was deleted (no href)
1985                         $line .= esc_path($to->{'file'});
1986                 }
1987         } else {
1988                 # "ordinary" diff
1989                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1990                 if ($from->{'href'}) {
1991                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1992                                          'a/' . esc_path($from->{'file'}));
1993                 } else { # file was added (no href)
1994                         $line .= 'a/' . esc_path($from->{'file'});
1995                 }
1996                 $line .= ' ';
1997                 if ($to->{'href'}) {
1998                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1999                                          'b/' . esc_path($to->{'file'}));
2000                 } else { # file was deleted
2001                         $line .= 'b/' . esc_path($to->{'file'});
2002                 }
2003         }
2004
2005         return "<div class=\"diff header\">$line</div>\n";
2006 }
2007
2008 # format extended diff header line, before patch itself
2009 sub format_extended_diff_header_line {
2010         my $line = shift;
2011         my $diffinfo = shift;
2012         my ($from, $to) = @_;
2013
2014         # match <path>
2015         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2016                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2017                                        esc_path($from->{'file'}));
2018         }
2019         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2020                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2021                                  esc_path($to->{'file'}));
2022         }
2023         # match single <mode>
2024         if ($line =~ m/\s(\d{6})$/) {
2025                 $line .= '<span class="info"> (' .
2026                          file_type_long($1) .
2027                          ')</span>';
2028         }
2029         # match <hash>
2030         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2031                 # can match only for combined diff
2032                 $line = 'index ';
2033                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2034                         if ($from->{'href'}[$i]) {
2035                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2036                                                   -class=>"hash"},
2037                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2038                         } else {
2039                                 $line .= '0' x 7;
2040                         }
2041                         # separator
2042                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2043                 }
2044                 $line .= '..';
2045                 if ($to->{'href'}) {
2046                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2047                                          substr($diffinfo->{'to_id'},0,7));
2048                 } else {
2049                         $line .= '0' x 7;
2050                 }
2051
2052         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2053                 # can match only for ordinary diff
2054                 my ($from_link, $to_link);
2055                 if ($from->{'href'}) {
2056                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2057                                              substr($diffinfo->{'from_id'},0,7));
2058                 } else {
2059                         $from_link = '0' x 7;
2060                 }
2061                 if ($to->{'href'}) {
2062                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2063                                            substr($diffinfo->{'to_id'},0,7));
2064                 } else {
2065                         $to_link = '0' x 7;
2066                 }
2067                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2068                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2069         }
2070
2071         return $line . "<br/>\n";
2072 }
2073
2074 # format from-file/to-file diff header
2075 sub format_diff_from_to_header {
2076         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2077         my $line;
2078         my $result = '';
2079
2080         $line = $from_line;
2081         #assert($line =~ m/^---/) if DEBUG;
2082         # no extra formatting for "^--- /dev/null"
2083         if (! $diffinfo->{'nparents'}) {
2084                 # ordinary (single parent) diff
2085                 if ($line =~ m!^--- "?a/!) {
2086                         if ($from->{'href'}) {
2087                                 $line = '--- a/' .
2088                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2089                                                 esc_path($from->{'file'}));
2090                         } else {
2091                                 $line = '--- a/' .
2092                                         esc_path($from->{'file'});
2093                         }
2094                 }
2095                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2096
2097         } else {
2098                 # combined diff (merge commit)
2099                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2100                         if ($from->{'href'}[$i]) {
2101                                 $line = '--- ' .
2102                                         $cgi->a({-href=>href(action=>"blobdiff",
2103                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2104                                                              hash_parent_base=>$parents[$i],
2105                                                              file_parent=>$from->{'file'}[$i],
2106                                                              hash=>$diffinfo->{'to_id'},
2107                                                              hash_base=>$hash,
2108                                                              file_name=>$to->{'file'}),
2109                                                  -class=>"path",
2110                                                  -title=>"diff" . ($i+1)},
2111                                                 $i+1) .
2112                                         '/' .
2113                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2114                                                 esc_path($from->{'file'}[$i]));
2115                         } else {
2116                                 $line = '--- /dev/null';
2117                         }
2118                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2119                 }
2120         }
2121
2122         $line = $to_line;
2123         #assert($line =~ m/^\+\+\+/) if DEBUG;
2124         # no extra formatting for "^+++ /dev/null"
2125         if ($line =~ m!^\+\+\+ "?b/!) {
2126                 if ($to->{'href'}) {
2127                         $line = '+++ b/' .
2128                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2129                                         esc_path($to->{'file'}));
2130                 } else {
2131                         $line = '+++ b/' .
2132                                 esc_path($to->{'file'});
2133                 }
2134         }
2135         $result .= qq!<div class="diff to_file">$line</div>\n!;
2136
2137         return $result;
2138 }
2139
2140 # create note for patch simplified by combined diff
2141 sub format_diff_cc_simplified {
2142         my ($diffinfo, @parents) = @_;
2143         my $result = '';
2144
2145         $result .= "<div class=\"diff header\">" .
2146                    "diff --cc ";
2147         if (!is_deleted($diffinfo)) {
2148                 $result .= $cgi->a({-href => href(action=>"blob",
2149                                                   hash_base=>$hash,
2150                                                   hash=>$diffinfo->{'to_id'},
2151                                                   file_name=>$diffinfo->{'to_file'}),
2152                                     -class => "path"},
2153                                    esc_path($diffinfo->{'to_file'}));
2154         } else {
2155                 $result .= esc_path($diffinfo->{'to_file'});
2156         }
2157         $result .= "</div>\n" . # class="diff header"
2158                    "<div class=\"diff nodifferences\">" .
2159                    "Simple merge" .
2160                    "</div>\n"; # class="diff nodifferences"
2161
2162         return $result;
2163 }
2164
2165 # format patch (diff) line (not to be used for diff headers)
2166 sub format_diff_line {
2167         my $line = shift;
2168         my ($from, $to) = @_;
2169         my $diff_class = "";
2170
2171         chomp $line;
2172
2173         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2174                 # combined diff
2175                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2176                 if ($line =~ m/^\@{3}/) {
2177                         $diff_class = " chunk_header";
2178                 } elsif ($line =~ m/^\\/) {
2179                         $diff_class = " incomplete";
2180                 } elsif ($prefix =~ tr/+/+/) {
2181                         $diff_class = " add";
2182                 } elsif ($prefix =~ tr/-/-/) {
2183                         $diff_class = " rem";
2184                 }
2185         } else {
2186                 # assume ordinary diff
2187                 my $char = substr($line, 0, 1);
2188                 if ($char eq '+') {
2189                         $diff_class = " add";
2190                 } elsif ($char eq '-') {
2191                         $diff_class = " rem";
2192                 } elsif ($char eq '@') {
2193                         $diff_class = " chunk_header";
2194                 } elsif ($char eq "\\") {
2195                         $diff_class = " incomplete";
2196                 }
2197         }
2198         $line = untabify($line);
2199         if ($from && $to && $line =~ m/^\@{2} /) {
2200                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2201                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2202
2203                 $from_lines = 0 unless defined $from_lines;
2204                 $to_lines   = 0 unless defined $to_lines;
2205
2206                 if ($from->{'href'}) {
2207                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2208                                              -class=>"list"}, $from_text);
2209                 }
2210                 if ($to->{'href'}) {
2211                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2212                                              -class=>"list"}, $to_text);
2213                 }
2214                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2215                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2216                 return "<div class=\"diff$diff_class\">$line</div>\n";
2217         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2218                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2219                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2220
2221                 @from_text = split(' ', $ranges);
2222                 for (my $i = 0; $i < @from_text; ++$i) {
2223                         ($from_start[$i], $from_nlines[$i]) =
2224                                 (split(',', substr($from_text[$i], 1)), 0);
2225                 }
2226
2227                 $to_text   = pop @from_text;
2228                 $to_start  = pop @from_start;
2229                 $to_nlines = pop @from_nlines;
2230
2231                 $line = "<span class=\"chunk_info\">$prefix ";
2232                 for (my $i = 0; $i < @from_text; ++$i) {
2233                         if ($from->{'href'}[$i]) {
2234                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2235                                                   -class=>"list"}, $from_text[$i]);
2236                         } else {
2237                                 $line .= $from_text[$i];
2238                         }
2239                         $line .= " ";
2240                 }
2241                 if ($to->{'href'}) {
2242                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2243                                           -class=>"list"}, $to_text);
2244                 } else {
2245                         $line .= $to_text;
2246                 }
2247                 $line .= " $prefix</span>" .
2248                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2249                 return "<div class=\"diff$diff_class\">$line</div>\n";
2250         }
2251         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2252 }
2253
2254 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2255 # linked.  Pass the hash of the tree/commit to snapshot.
2256 sub format_snapshot_links {
2257         my ($hash) = @_;
2258         my $num_fmts = @snapshot_fmts;
2259         if ($num_fmts > 1) {
2260                 # A parenthesized list of links bearing format names.
2261                 # e.g. "snapshot (_tar.gz_ _zip_)"
2262                 return "snapshot (" . join(' ', map
2263                         $cgi->a({
2264                                 -href => href(
2265                                         action=>"snapshot",
2266                                         hash=>$hash,
2267                                         snapshot_format=>$_
2268                                 )
2269                         }, $known_snapshot_formats{$_}{'display'})
2270                 , @snapshot_fmts) . ")";
2271         } elsif ($num_fmts == 1) {
2272                 # A single "snapshot" link whose tooltip bears the format name.
2273                 # i.e. "_snapshot_"
2274                 my ($fmt) = @snapshot_fmts;
2275                 return
2276                         $cgi->a({
2277                                 -href => href(
2278                                         action=>"snapshot",
2279                                         hash=>$hash,
2280                                         snapshot_format=>$fmt
2281                                 ),
2282                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2283                         }, "snapshot");
2284         } else { # $num_fmts == 0
2285                 return undef;
2286         }
2287 }
2288
2289 ## ......................................................................
2290 ## functions returning values to be passed, perhaps after some
2291 ## transformation, to other functions; e.g. returning arguments to href()
2292
2293 # returns hash to be passed to href to generate gitweb URL
2294 # in -title key it returns description of link
2295 sub get_feed_info {
2296         my $format = shift || 'Atom';
2297         my %res = (action => lc($format));
2298
2299         # feed links are possible only for project views
2300         return unless (defined $project);
2301         # some views should link to OPML, or to generic project feed,
2302         # or don't have specific feed yet (so they should use generic)
2303         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2304
2305         my $branch;
2306         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2307         # from tag links; this also makes possible to detect branch links
2308         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2309             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2310                 $branch = $1;
2311         }
2312         # find log type for feed description (title)
2313         my $type = 'log';
2314         if (defined $file_name) {
2315                 $type  = "history of $file_name";
2316                 $type .= "/" if ($action eq 'tree');
2317                 $type .= " on '$branch'" if (defined $branch);
2318         } else {
2319                 $type = "log of $branch" if (defined $branch);
2320         }
2321
2322         $res{-title} = $type;
2323         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2324         $res{'file_name'} = $file_name;
2325
2326         return %res;
2327 }
2328
2329 ## ----------------------------------------------------------------------
2330 ## git utility subroutines, invoking git commands
2331
2332 # returns path to the core git executable and the --git-dir parameter as list
2333 sub git_cmd {
2334         $number_of_git_cmds++;
2335         return $GIT, '--git-dir='.$git_dir;
2336 }
2337
2338 # quote the given arguments for passing them to the shell
2339 # quote_command("command", "arg 1", "arg with ' and ! characters")
2340 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2341 # Try to avoid using this function wherever possible.
2342 sub quote_command {
2343         return join(' ',
2344                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2345 }
2346
2347 # get HEAD ref of given project as hash
2348 sub git_get_head_hash {
2349         return git_get_full_hash(shift, 'HEAD');
2350 }
2351
2352 sub git_get_full_hash {
2353         return git_get_hash(@_);
2354 }
2355
2356 sub git_get_short_hash {
2357         return git_get_hash(@_, '--short=7');
2358 }
2359
2360 sub git_get_hash {
2361         my ($project, $hash, @options) = @_;
2362         my $o_git_dir = $git_dir;
2363         my $retval = undef;
2364         $git_dir = "$projectroot/$project";
2365         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2366             '--verify', '-q', @options, $hash) {
2367                 $retval = <$fd>;
2368                 chomp $retval if defined $retval;
2369                 close $fd;
2370         }
2371         if (defined $o_git_dir) {
2372                 $git_dir = $o_git_dir;
2373         }
2374         return $retval;
2375 }
2376
2377 # get type of given object
2378 sub git_get_type {
2379         my $hash = shift;
2380
2381         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2382         my $type = <$fd>;
2383         close $fd or return;
2384         chomp $type;
2385         return $type;
2386 }
2387
2388 # repository configuration
2389 our $config_file = '';
2390 our %config;
2391
2392 # store multiple values for single key as anonymous array reference
2393 # single values stored directly in the hash, not as [ <value> ]
2394 sub hash_set_multi {
2395         my ($hash, $key, $value) = @_;
2396
2397         if (!exists $hash->{$key}) {
2398                 $hash->{$key} = $value;
2399         } elsif (!ref $hash->{$key}) {
2400                 $hash->{$key} = [ $hash->{$key}, $value ];
2401         } else {
2402                 push @{$hash->{$key}}, $value;
2403         }
2404 }
2405
2406 # return hash of git project configuration
2407 # optionally limited to some section, e.g. 'gitweb'
2408 sub git_parse_project_config {
2409         my $section_regexp = shift;
2410         my %config;
2411
2412         local $/ = "\0";
2413
2414         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2415                 or return;
2416
2417         while (my $keyval = <$fh>) {
2418                 chomp $keyval;
2419                 my ($key, $value) = split(/\n/, $keyval, 2);
2420
2421                 hash_set_multi(\%config, $key, $value)
2422                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2423         }
2424         close $fh;
2425
2426         return %config;
2427 }
2428
2429 # convert config value to boolean: 'true' or 'false'
2430 # no value, number > 0, 'true' and 'yes' values are true
2431 # rest of values are treated as false (never as error)
2432 sub config_to_bool {
2433         my $val = shift;
2434
2435         return 1 if !defined $val;             # section.key
2436
2437         # strip leading and trailing whitespace
2438         $val =~ s/^\s+//;
2439         $val =~ s/\s+$//;
2440
2441         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2442                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2443 }
2444
2445 # convert config value to simple decimal number
2446 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2447 # to be multiplied by 1024, 1048576, or 1073741824
2448 sub config_to_int {
2449         my $val = shift;
2450
2451         # strip leading and trailing whitespace
2452         $val =~ s/^\s+//;
2453         $val =~ s/\s+$//;
2454
2455         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2456                 $unit = lc($unit);
2457                 # unknown unit is treated as 1
2458                 return $num * ($unit eq 'g' ? 1073741824 :
2459                                $unit eq 'm' ?    1048576 :
2460                                $unit eq 'k' ?       1024 : 1);
2461         }
2462         return $val;
2463 }
2464
2465 # convert config value to array reference, if needed
2466 sub config_to_multi {
2467         my $val = shift;
2468
2469         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2470 }
2471
2472 sub git_get_project_config {
2473         my ($key, $type) = @_;
2474
2475         return unless defined $git_dir;
2476
2477         # key sanity check
2478         return unless ($key);
2479         $key =~ s/^gitweb\.//;
2480         return if ($key =~ m/\W/);
2481
2482         # type sanity check
2483         if (defined $type) {
2484                 $type =~ s/^--//;
2485                 $type = undef
2486                         unless ($type eq 'bool' || $type eq 'int');
2487         }
2488
2489         # get config
2490         if (!defined $config_file ||
2491             $config_file ne "$git_dir/config") {
2492                 %config = git_parse_project_config('gitweb');
2493                 $config_file = "$git_dir/config";
2494         }
2495
2496         # check if config variable (key) exists
2497         return unless exists $config{"gitweb.$key"};
2498
2499         # ensure given type
2500         if (!defined $type) {
2501                 return $config{"gitweb.$key"};
2502         } elsif ($type eq 'bool') {
2503                 # backward compatibility: 'git config --bool' returns true/false
2504                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2505         } elsif ($type eq 'int') {
2506                 return config_to_int($config{"gitweb.$key"});
2507         }
2508         return $config{"gitweb.$key"};
2509 }
2510
2511 # get hash of given path at given ref
2512 sub git_get_hash_by_path {
2513         my $base = shift;
2514         my $path = shift || return undef;
2515         my $type = shift;
2516
2517         $path =~ s,/+$,,;
2518
2519         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2520                 or die_error(500, "Open git-ls-tree failed");
2521         my $line = <$fd>;
2522         close $fd or return undef;
2523
2524         if (!defined $line) {
2525                 # there is no tree or hash given by $path at $base
2526                 return undef;
2527         }
2528
2529         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2530         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2531         if (defined $type && $type ne $2) {
2532                 # type doesn't match
2533                 return undef;
2534         }
2535         return $3;
2536 }
2537
2538 # get path of entry with given hash at given tree-ish (ref)
2539 # used to get 'from' filename for combined diff (merge commit) for renames
2540 sub git_get_path_by_hash {
2541         my $base = shift || return;
2542         my $hash = shift || return;
2543
2544         local $/ = "\0";
2545
2546         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2547                 or return undef;
2548         while (my $line = <$fd>) {
2549                 chomp $line;
2550
2551                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2552                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2553                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2554                         close $fd;
2555                         return $1;
2556                 }
2557         }
2558         close $fd;
2559         return undef;
2560 }
2561
2562 ## ......................................................................
2563 ## git utility functions, directly accessing git repository
2564
2565 sub git_get_project_description {
2566         my $path = shift;
2567
2568         $git_dir = "$projectroot/$path";
2569         open my $fd, '<', "$git_dir/description"
2570                 or return git_get_project_config('description');
2571         my $descr = <$fd>;
2572         close $fd;
2573         if (defined $descr) {
2574                 chomp $descr;
2575         }
2576         return $descr;
2577 }
2578
2579 # supported formats:
2580 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2581 #   - if its contents is a number, use it as tag weight,
2582 #   - otherwise add a tag with weight 1
2583 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2584 #   the same value multiple times increases tag weight
2585 # * `gitweb.ctag' multi-valued repo config variable
2586 sub git_get_project_ctags {
2587         my $project = shift;
2588         my $ctags = {};
2589
2590         $git_dir = "$projectroot/$project";
2591         if (opendir my $dh, "$git_dir/ctags") {
2592                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2593                 foreach my $tagfile (@files) {
2594                         open my $ct, '<', $tagfile
2595                                 or next;
2596                         my $val = <$ct>;
2597                         chomp $val if $val;
2598                         close $ct;
2599
2600                         (my $ctag = $tagfile) =~ s#.*/##;
2601                         if ($val =~ /\d+/) {
2602                                 $ctags->{$ctag} = $val;
2603                         } else {
2604                                 $ctags->{$ctag} = 1;
2605                         }
2606                 }
2607                 closedir $dh;
2608
2609         } elsif (open my $fh, '<', "$git_dir/ctags") {
2610                 while (my $line = <$fh>) {
2611                         chomp $line;
2612                         $ctags->{$line}++ if $line;
2613                 }
2614                 close $fh;
2615
2616         } else {
2617                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2618                 foreach my $tag (@$taglist) {
2619                         $ctags->{$tag}++;
2620                 }
2621         }
2622
2623         return $ctags;
2624 }
2625
2626 # return hash, where keys are content tags ('ctags'),
2627 # and values are sum of weights of given tag in every project
2628 sub git_gather_all_ctags {
2629         my $projects = shift;
2630         my $ctags = {};
2631
2632         foreach my $p (@$projects) {
2633                 foreach my $ct (keys %{$p->{'ctags'}}) {
2634                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2635                 }
2636         }
2637
2638         return $ctags;
2639 }
2640
2641 sub git_populate_project_tagcloud {
2642         my $ctags = shift;
2643
2644         # First, merge different-cased tags; tags vote on casing
2645         my %ctags_lc;
2646         foreach (keys %$ctags) {
2647                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2648                 if (not $ctags_lc{lc $_}->{topcount}
2649                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2650                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2651                         $ctags_lc{lc $_}->{topname} = $_;
2652                 }
2653         }
2654
2655         my $cloud;
2656         my $matched = $cgi->param('by_tag');
2657         if (eval { require HTML::TagCloud; 1; }) {
2658                 $cloud = HTML::TagCloud->new;
2659                 foreach my $ctag (sort keys %ctags_lc) {
2660                         # Pad the title with spaces so that the cloud looks
2661                         # less crammed.
2662                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2663                         $title =~ s/ /&nbsp;/g;
2664                         $title =~ s/^/&nbsp;/g;
2665                         $title =~ s/$/&nbsp;/g;
2666                         if (defined $matched && $matched eq $ctag) {
2667                                 $title = qq(<span class="match">$title</span>);
2668                         }
2669                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2670                                     $ctags_lc{$ctag}->{count});
2671                 }
2672         } else {
2673                 $cloud = {};
2674                 foreach my $ctag (keys %ctags_lc) {
2675                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2676                         if (defined $matched && $matched eq $ctag) {
2677                                 $title = qq(<span class="match">$title</span>);
2678                         }
2679                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2680                         $cloud->{$ctag}{ctag} =
2681                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2682                 }
2683         }
2684         return $cloud;
2685 }
2686
2687 sub git_show_project_tagcloud {
2688         my ($cloud, $count) = @_;
2689         if (ref $cloud eq 'HTML::TagCloud') {
2690                 return $cloud->html_and_css($count);
2691         } else {
2692                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2693                 return
2694                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2695                         join (', ', map {
2696                                 $cloud->{$_}->{'ctag'}
2697                         } splice(@tags, 0, $count)) .
2698                         '</div>';
2699         }
2700 }
2701
2702 sub git_get_project_url_list {
2703         my $path = shift;
2704
2705         $git_dir = "$projectroot/$path";
2706         open my $fd, '<', "$git_dir/cloneurl"
2707                 or return wantarray ?
2708                 @{ config_to_multi(git_get_project_config('url')) } :
2709                    config_to_multi(git_get_project_config('url'));
2710         my @git_project_url_list = map { chomp; $_ } <$fd>;
2711         close $fd;
2712
2713         return wantarray ? @git_project_url_list : \@git_project_url_list;
2714 }
2715
2716 sub git_get_projects_list {
2717         my $filter = shift || '';
2718         my @list;
2719
2720         $filter =~ s/\.git$//;
2721
2722         if (-d $projects_list) {
2723                 # search in directory
2724                 my $dir = $projects_list;
2725                 # remove the trailing "/"
2726                 $dir =~ s!/+$!!;
2727                 my $pfxlen = length("$projects_list");
2728                 my $pfxdepth = ($projects_list =~ tr!/!!);
2729                 # when filtering, search only given subdirectory
2730                 if ($filter) {
2731                         $dir .= "/$filter";
2732                         $dir =~ s!/+$!!;
2733                 }
2734
2735                 File::Find::find({
2736                         follow_fast => 1, # follow symbolic links
2737                         follow_skip => 2, # ignore duplicates
2738                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2739                         wanted => sub {
2740                                 # global variables
2741                                 our $project_maxdepth;
2742                                 our $projectroot;
2743                                 # skip project-list toplevel, if we get it.
2744                                 return if (m!^[/.]$!);
2745                                 # only directories can be git repositories
2746                                 return unless (-d $_);
2747                                 # don't traverse too deep (Find is super slow on os x)
2748                                 # $project_maxdepth excludes depth of $projectroot
2749                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2750                                         $File::Find::prune = 1;
2751                                         return;
2752                                 }
2753
2754                                 my $path = substr($File::Find::name, $pfxlen + 1);
2755                                 # we check related file in $projectroot
2756                                 if (check_export_ok("$projectroot/$path")) {
2757                                         push @list, { path => $path };
2758                                         $File::Find::prune = 1;
2759                                 }
2760                         },
2761                 }, "$dir");
2762
2763         } elsif (-f $projects_list) {
2764                 # read from file(url-encoded):
2765                 # 'git%2Fgit.git Linus+Torvalds'
2766                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2767                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2768                 open my $fd, '<', $projects_list or return;
2769         PROJECT:
2770                 while (my $line = <$fd>) {
2771                         chomp $line;
2772                         my ($path, $owner) = split ' ', $line;
2773                         $path = unescape($path);
2774                         $owner = unescape($owner);
2775                         if (!defined $path) {
2776                                 next;
2777                         }
2778                         # if $filter is rpovided, check if $path begins with $filter
2779                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2780                                 next;
2781                         }
2782                         if (check_export_ok("$projectroot/$path")) {
2783                                 my $pr = {
2784                                         path => $path,
2785                                         owner => to_utf8($owner),
2786                                 };
2787                                 push @list, $pr;
2788                         }
2789                 }
2790                 close $fd;
2791         }
2792         return @list;
2793 }
2794
2795 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2796 # as side effects it sets 'forks' field to list of forks for forked projects
2797 sub filter_forks_from_projects_list {
2798         my $projects = shift;
2799
2800         my %trie; # prefix tree of directories (path components)
2801         # generate trie out of those directories that might contain forks
2802         foreach my $pr (@$projects) {
2803                 my $path = $pr->{'path'};
2804                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2805                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2806                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2807                 next unless (-d $path);   # containing directory exists
2808                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2809
2810                 # add to trie
2811                 my @dirs = split('/', $path);
2812                 # walk the trie, until either runs out of components or out of trie
2813                 my $ref = \%trie;
2814                 while (scalar @dirs &&
2815                        exists($ref->{$dirs[0]})) {
2816                         $ref = $ref->{shift @dirs};
2817                 }
2818                 # create rest of trie structure from rest of components
2819                 foreach my $dir (@dirs) {
2820                         $ref = $ref->{$dir} = {};
2821                 }
2822                 # create end marker, store $pr as a data
2823                 $ref->{''} = $pr if (!exists $ref->{''});
2824         }
2825
2826         # filter out forks, by finding shortest prefix match for paths
2827         my @filtered;
2828  PROJECT:
2829         foreach my $pr (@$projects) {
2830                 # trie lookup
2831                 my $ref = \%trie;
2832         DIR:
2833                 foreach my $dir (split('/', $pr->{'path'})) {
2834                         if (exists $ref->{''}) {
2835                                 # found [shortest] prefix, is a fork - skip it
2836                                 push @{$ref->{''}{'forks'}}, $pr;
2837                                 next PROJECT;
2838                         }
2839                         if (!exists $ref->{$dir}) {
2840                                 # not in trie, cannot have prefix, not a fork
2841                                 push @filtered, $pr;
2842                                 next PROJECT;
2843                         }
2844                         # If the dir is there, we just walk one step down the trie.
2845                         $ref = $ref->{$dir};
2846                 }
2847                 # we ran out of trie
2848                 # (shouldn't happen: it's either no match, or end marker)
2849                 push @filtered, $pr;
2850         }
2851
2852         return @filtered;
2853 }
2854
2855 # note: fill_project_list_info must be run first,
2856 # for 'descr_long' and 'ctags' to be filled
2857 sub search_projects_list {
2858         my ($projlist, %opts) = @_;
2859         my $tagfilter  = $opts{'tagfilter'};
2860         my $searchtext = $opts{'searchtext'};
2861
2862         return @$projlist
2863                 unless ($tagfilter || $searchtext);
2864
2865         my @projects;
2866  PROJECT:
2867         foreach my $pr (@$projlist) {
2868
2869                 if ($tagfilter) {
2870                         next unless ref($pr->{'ctags'}) eq 'HASH';
2871                         next unless
2872                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2873                 }
2874
2875                 if ($searchtext) {
2876                         next unless
2877                                 $pr->{'path'} =~ /$searchtext/ ||
2878                                 $pr->{'descr_long'} =~ /$searchtext/;
2879                 }
2880
2881                 push @projects, $pr;
2882         }
2883
2884         return @projects;
2885 }
2886
2887 our $gitweb_project_owner = undef;
2888 sub git_get_project_list_from_file {
2889
2890         return if (defined $gitweb_project_owner);
2891
2892         $gitweb_project_owner = {};
2893         # read from file (url-encoded):
2894         # 'git%2Fgit.git Linus+Torvalds'
2895         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2896         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2897         if (-f $projects_list) {
2898                 open(my $fd, '<', $projects_list);
2899                 while (my $line = <$fd>) {
2900                         chomp $line;
2901                         my ($pr, $ow) = split ' ', $line;
2902                         $pr = unescape($pr);
2903                         $ow = unescape($ow);
2904                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2905                 }
2906                 close $fd;
2907         }
2908 }
2909
2910 sub git_get_project_owner {
2911         my $project = shift;
2912         my $owner;
2913
2914         return undef unless $project;
2915         $git_dir = "$projectroot/$project";
2916
2917         if (!defined $gitweb_project_owner) {
2918                 git_get_project_list_from_file();
2919         }
2920
2921         if (exists $gitweb_project_owner->{$project}) {
2922                 $owner = $gitweb_project_owner->{$project};
2923         }
2924         if (!defined $owner){
2925                 $owner = git_get_project_config('owner');
2926         }
2927         if (!defined $owner) {
2928                 $owner = get_file_owner("$git_dir");
2929         }
2930
2931         return $owner;
2932 }
2933
2934 sub git_get_last_activity {
2935         my ($path) = @_;
2936         my $fd;
2937
2938         $git_dir = "$projectroot/$path";
2939         open($fd, "-|", git_cmd(), 'for-each-ref',
2940              '--format=%(committer)',
2941              '--sort=-committerdate',
2942              '--count=1',
2943              'refs/heads') or return;
2944         my $most_recent = <$fd>;
2945         close $fd or return;
2946         if (defined $most_recent &&
2947             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2948                 my $timestamp = $1;
2949                 my $age = time - $timestamp;
2950                 return ($age, age_string($age));
2951         }
2952         return (undef, undef);
2953 }
2954
2955 # Implementation note: when a single remote is wanted, we cannot use 'git
2956 # remote show -n' because that command always work (assuming it's a remote URL
2957 # if it's not defined), and we cannot use 'git remote show' because that would
2958 # try to make a network roundtrip. So the only way to find if that particular
2959 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2960 # and when we find what we want.
2961 sub git_get_remotes_list {
2962         my $wanted = shift;
2963         my %remotes = ();
2964
2965         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2966         return unless $fd;
2967         while (my $remote = <$fd>) {
2968                 chomp $remote;
2969                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2970                 next if $wanted and not $remote eq $wanted;
2971                 my ($url, $key) = ($1, $2);
2972
2973                 $remotes{$remote} ||= { 'heads' => () };
2974                 $remotes{$remote}{$key} = $url;
2975         }
2976         close $fd or return;
2977         return wantarray ? %remotes : \%remotes;
2978 }
2979
2980 # Takes a hash of remotes as first parameter and fills it by adding the
2981 # available remote heads for each of the indicated remotes.
2982 sub fill_remote_heads {
2983         my $remotes = shift;
2984         my @heads = map { "remotes/$_" } keys %$remotes;
2985         my @remoteheads = git_get_heads_list(undef, @heads);
2986         foreach my $remote (keys %$remotes) {
2987                 $remotes->{$remote}{'heads'} = [ grep {
2988                         $_->{'name'} =~ s!^$remote/!!
2989                         } @remoteheads ];
2990         }
2991 }
2992
2993 sub git_get_references {
2994         my $type = shift || "";
2995         my %refs;
2996         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2997         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2998         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2999                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3000                 or return;
3001
3002         while (my $line = <$fd>) {
3003                 chomp $line;
3004                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3005                         if (defined $refs{$1}) {
3006                                 push @{$refs{$1}}, $2;
3007                         } else {
3008                                 $refs{$1} = [ $2 ];
3009                         }
3010                 }
3011         }
3012         close $fd or return;
3013         return \%refs;
3014 }
3015
3016 sub git_get_rev_name_tags {
3017         my $hash = shift || return undef;
3018
3019         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3020                 or return;
3021         my $name_rev = <$fd>;
3022         close $fd;
3023
3024         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3025                 return $1;
3026         } else {
3027                 # catches also '$hash undefined' output
3028                 return undef;
3029         }
3030 }
3031
3032 ## ----------------------------------------------------------------------
3033 ## parse to hash functions
3034
3035 sub parse_date {
3036         my $epoch = shift;
3037         my $tz = shift || "-0000";
3038
3039         my %date;
3040         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3041         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3042         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3043         $date{'hour'} = $hour;
3044         $date{'minute'} = $min;
3045         $date{'mday'} = $mday;
3046         $date{'day'} = $days[$wday];
3047         $date{'month'} = $months[$mon];
3048         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3049                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3050         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3051                              $mday, $months[$mon], $hour ,$min;
3052         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3053                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3054
3055         my ($tz_sign, $tz_hour, $tz_min) =
3056                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3057         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3058         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3059         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3060         $date{'hour_local'} = $hour;
3061         $date{'minute_local'} = $min;
3062         $date{'tz_local'} = $tz;
3063         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3064                                   1900+$year, $mon+1, $mday,
3065                                   $hour, $min, $sec, $tz);
3066         return %date;
3067 }
3068
3069 sub parse_tag {
3070         my $tag_id = shift;
3071         my %tag;
3072         my @comment;
3073
3074         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3075         $tag{'id'} = $tag_id;
3076         while (my $line = <$fd>) {
3077                 chomp $line;
3078                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3079                         $tag{'object'} = $1;
3080                 } elsif ($line =~ m/^type (.+)$/) {
3081                         $tag{'type'} = $1;
3082                 } elsif ($line =~ m/^tag (.+)$/) {
3083                         $tag{'name'} = $1;
3084                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3085                         $tag{'author'} = $1;
3086                         $tag{'author_epoch'} = $2;
3087                         $tag{'author_tz'} = $3;
3088                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3089                                 $tag{'author_name'}  = $1;
3090                                 $tag{'author_email'} = $2;
3091                         } else {
3092                                 $tag{'author_name'} = $tag{'author'};
3093                         }
3094                 } elsif ($line =~ m/--BEGIN/) {
3095                         push @comment, $line;
3096                         last;
3097                 } elsif ($line eq "") {
3098                         last;
3099                 }
3100         }
3101         push @comment, <$fd>;
3102         $tag{'comment'} = \@comment;
3103         close $fd or return;
3104         if (!defined $tag{'name'}) {
3105                 return
3106         };
3107         return %tag
3108 }
3109
3110 sub parse_commit_text {
3111         my ($commit_text, $withparents) = @_;
3112         my @commit_lines = split '\n', $commit_text;
3113         my %co;
3114
3115         pop @commit_lines; # Remove '\0'
3116
3117         if (! @commit_lines) {
3118                 return;
3119         }
3120
3121         my $header = shift @commit_lines;
3122         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3123                 return;
3124         }
3125         ($co{'id'}, my @parents) = split ' ', $header;
3126         while (my $line = shift @commit_lines) {
3127                 last if $line eq "\n";
3128                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3129                         $co{'tree'} = $1;
3130                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3131                         push @parents, $1;
3132                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3133                         $co{'author'} = to_utf8($1);
3134                         $co{'author_epoch'} = $2;
3135                         $co{'author_tz'} = $3;
3136                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3137                                 $co{'author_name'}  = $1;
3138                                 $co{'author_email'} = $2;
3139                         } else {
3140                                 $co{'author_name'} = $co{'author'};
3141                         }
3142                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3143                         $co{'committer'} = to_utf8($1);
3144                         $co{'committer_epoch'} = $2;
3145                         $co{'committer_tz'} = $3;
3146                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3147                                 $co{'committer_name'}  = $1;
3148                                 $co{'committer_email'} = $2;
3149                         } else {
3150                                 $co{'committer_name'} = $co{'committer'};
3151                         }
3152                 }
3153         }
3154         if (!defined $co{'tree'}) {
3155                 return;
3156         };
3157         $co{'parents'} = \@parents;
3158         $co{'parent'} = $parents[0];
3159
3160         foreach my $title (@commit_lines) {
3161                 $title =~ s/^    //;
3162                 if ($title ne "") {
3163                         $co{'title'} = chop_str($title, 80, 5);
3164                         # remove leading stuff of merges to make the interesting part visible
3165                         if (length($title) > 50) {
3166                                 $title =~ s/^Automatic //;
3167                                 $title =~ s/^merge (of|with) /Merge ... /i;
3168                                 if (length($title) > 50) {
3169                                         $title =~ s/(http|rsync):\/\///;
3170                                 }
3171                                 if (length($title) > 50) {
3172                                         $title =~ s/(master|www|rsync)\.//;
3173                                 }
3174                                 if (length($title) > 50) {
3175                                         $title =~ s/kernel.org:?//;
3176                                 }
3177                                 if (length($title) > 50) {
3178                                         $title =~ s/\/pub\/scm//;
3179                                 }
3180                         }
3181                         $co{'title_short'} = chop_str($title, 50, 5);
3182                         last;
3183                 }
3184         }
3185         if (! defined $co{'title'} || $co{'title'} eq "") {
3186                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3187         }
3188         # remove added spaces
3189         foreach my $line (@commit_lines) {
3190                 $line =~ s/^    //;
3191         }
3192         $co{'comment'} = \@commit_lines;
3193
3194         my $age = time - $co{'committer_epoch'};
3195         $co{'age'} = $age;
3196         $co{'age_string'} = age_string($age);
3197         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3198         if ($age > 60*60*24*7*2) {
3199                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3200                 $co{'age_string_age'} = $co{'age_string'};
3201         } else {
3202                 $co{'age_string_date'} = $co{'age_string'};
3203                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3204         }
3205         return %co;
3206 }
3207
3208 sub parse_commit {
3209         my ($commit_id) = @_;
3210         my %co;
3211
3212         local $/ = "\0";
3213
3214         open my $fd, "-|", git_cmd(), "rev-list",
3215                 "--parents",
3216                 "--header",
3217                 "--max-count=1",
3218                 $commit_id,
3219                 "--",
3220                 or die_error(500, "Open git-rev-list failed");
3221         %co = parse_commit_text(<$fd>, 1);
3222         close $fd;
3223
3224         return %co;
3225 }
3226
3227 sub parse_commits {
3228         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3229         my @cos;
3230
3231         $maxcount ||= 1;
3232         $skip ||= 0;
3233
3234         local $/ = "\0";
3235
3236         open my $fd, "-|", git_cmd(), "rev-list",
3237                 "--header",
3238                 @args,
3239                 ("--max-count=" . $maxcount),
3240                 ("--skip=" . $skip),
3241                 @extra_options,
3242                 $commit_id,
3243                 "--",
3244                 ($filename ? ($filename) : ())
3245                 or die_error(500, "Open git-rev-list failed");
3246         while (my $line = <$fd>) {
3247                 my %co = parse_commit_text($line);
3248                 push @cos, \%co;
3249         }
3250         close $fd;
3251
3252         return wantarray ? @cos : \@cos;
3253 }
3254
3255 # parse line of git-diff-tree "raw" output
3256 sub parse_difftree_raw_line {
3257         my $line = shift;
3258         my %res;
3259
3260         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3261         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3262         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3263                 $res{'from_mode'} = $1;
3264                 $res{'to_mode'} = $2;
3265                 $res{'from_id'} = $3;
3266                 $res{'to_id'} = $4;
3267                 $res{'status'} = $5;
3268                 $res{'similarity'} = $6;
3269                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3270                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3271                 } else {
3272                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3273                 }
3274         }
3275         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3276         # combined diff (for merge commit)
3277         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3278                 $res{'nparents'}  = length($1);
3279                 $res{'from_mode'} = [ split(' ', $2) ];
3280                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3281                 $res{'from_id'} = [ split(' ', $3) ];
3282                 $res{'to_id'} = pop @{$res{'from_id'}};
3283                 $res{'status'} = [ split('', $4) ];
3284                 $res{'to_file'} = unquote($5);
3285         }
3286         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3287         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3288                 $res{'commit'} = $1;
3289         }
3290
3291         return wantarray ? %res : \%res;
3292 }
3293
3294 # wrapper: return parsed line of git-diff-tree "raw" output
3295 # (the argument might be raw line, or parsed info)
3296 sub parsed_difftree_line {
3297         my $line_or_ref = shift;
3298
3299         if (ref($line_or_ref) eq "HASH") {
3300                 # pre-parsed (or generated by hand)
3301                 return $line_or_ref;
3302         } else {
3303                 return parse_difftree_raw_line($line_or_ref);
3304         }
3305 }
3306
3307 # parse line of git-ls-tree output
3308 sub parse_ls_tree_line {
3309         my $line = shift;
3310         my %opts = @_;
3311         my %res;
3312
3313         if ($opts{'-l'}) {
3314                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3315                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3316
3317                 $res{'mode'} = $1;
3318                 $res{'type'} = $2;
3319                 $res{'hash'} = $3;
3320                 $res{'size'} = $4;
3321                 if ($opts{'-z'}) {
3322                         $res{'name'} = $5;
3323                 } else {
3324                         $res{'name'} = unquote($5);
3325                 }
3326         } else {
3327                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3328                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3329
3330                 $res{'mode'} = $1;
3331                 $res{'type'} = $2;
3332                 $res{'hash'} = $3;
3333                 if ($opts{'-z'}) {
3334                         $res{'name'} = $4;
3335                 } else {
3336                         $res{'name'} = unquote($4);
3337                 }
3338         }
3339
3340         return wantarray ? %res : \%res;
3341 }
3342
3343 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3344 sub parse_from_to_diffinfo {
3345         my ($diffinfo, $from, $to, @parents) = @_;
3346
3347         if ($diffinfo->{'nparents'}) {
3348                 # combined diff
3349                 $from->{'file'} = [];
3350                 $from->{'href'} = [];
3351                 fill_from_file_info($diffinfo, @parents)
3352                         unless exists $diffinfo->{'from_file'};
3353                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3354                         $from->{'file'}[$i] =
3355                                 defined $diffinfo->{'from_file'}[$i] ?
3356                                         $diffinfo->{'from_file'}[$i] :
3357                                         $diffinfo->{'to_file'};
3358                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3359                                 $from->{'href'}[$i] = href(action=>"blob",
3360                                                            hash_base=>$parents[$i],
3361                                                            hash=>$diffinfo->{'from_id'}[$i],
3362                                                            file_name=>$from->{'file'}[$i]);
3363                         } else {
3364                                 $from->{'href'}[$i] = undef;
3365                         }
3366                 }
3367         } else {
3368                 # ordinary (not combined) diff
3369                 $from->{'file'} = $diffinfo->{'from_file'};
3370                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3371                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3372                                                hash=>$diffinfo->{'from_id'},
3373                                                file_name=>$from->{'file'});
3374                 } else {
3375                         delete $from->{'href'};
3376                 }
3377         }
3378
3379         $to->{'file'} = $diffinfo->{'to_file'};
3380         if (!is_deleted($diffinfo)) { # file exists in result
3381                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3382                                      hash=>$diffinfo->{'to_id'},
3383                                      file_name=>$to->{'file'});
3384         } else {
3385                 delete $to->{'href'};
3386         }
3387 }
3388
3389 ## ......................................................................
3390 ## parse to array of hashes functions
3391
3392 sub git_get_heads_list {
3393         my ($limit, @classes) = @_;
3394         @classes = ('heads') unless @classes;
3395         my @patterns = map { "refs/$_" } @classes;
3396         my @headslist;
3397
3398         open my $fd, '-|', git_cmd(), 'for-each-ref',
3399                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3400                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3401                 @patterns
3402                 or return;
3403         while (my $line = <$fd>) {
3404                 my %ref_item;
3405
3406                 chomp $line;
3407                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3408                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3409                 my ($committer, $epoch, $tz) =
3410                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3411                 $ref_item{'fullname'}  = $name;
3412                 $name =~ s!^refs/(?:head|remote)s/!!;
3413
3414                 $ref_item{'name'}  = $name;
3415                 $ref_item{'id'}    = $hash;
3416                 $ref_item{'title'} = $title || '(no commit message)';
3417                 $ref_item{'epoch'} = $epoch;
3418                 if ($epoch) {
3419                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3420                 } else {
3421                         $ref_item{'age'} = "unknown";
3422                 }
3423
3424                 push @headslist, \%ref_item;
3425         }
3426         close $fd;
3427
3428         return wantarray ? @headslist : \@headslist;
3429 }
3430
3431 sub git_get_tags_list {
3432         my $limit = shift;
3433         my @tagslist;
3434
3435         open my $fd, '-|', git_cmd(), 'for-each-ref',
3436                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3437                 '--format=%(objectname) %(objecttype) %(refname) '.
3438                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3439                 'refs/tags'
3440                 or return;
3441         while (my $line = <$fd>) {
3442                 my %ref_item;
3443
3444                 chomp $line;
3445                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3446                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3447                 my ($creator, $epoch, $tz) =
3448                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3449                 $ref_item{'fullname'} = $name;
3450                 $name =~ s!^refs/tags/!!;
3451
3452                 $ref_item{'type'} = $type;
3453                 $ref_item{'id'} = $id;
3454                 $ref_item{'name'} = $name;
3455                 if ($type eq "tag") {
3456                         $ref_item{'subject'} = $title;
3457                         $ref_item{'reftype'} = $reftype;
3458                         $ref_item{'refid'}   = $refid;
3459                 } else {
3460                         $ref_item{'reftype'} = $type;
3461                         $ref_item{'refid'}   = $id;
3462                 }
3463
3464                 if ($type eq "tag" || $type eq "commit") {
3465                         $ref_item{'epoch'} = $epoch;
3466                         if ($epoch) {
3467                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3468                         } else {
3469                                 $ref_item{'age'} = "unknown";
3470                         }
3471                 }
3472
3473                 push @tagslist, \%ref_item;
3474         }
3475         close $fd;
3476
3477         return wantarray ? @tagslist : \@tagslist;
3478 }
3479
3480 ## ----------------------------------------------------------------------
3481 ## filesystem-related functions
3482
3483 sub get_file_owner {
3484         my $path = shift;
3485
3486         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3487         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3488         if (!defined $gcos) {
3489                 return undef;
3490         }
3491         my $owner = $gcos;
3492         $owner =~ s/[,;].*$//;
3493         return to_utf8($owner);
3494 }
3495
3496 # assume that file exists
3497 sub insert_file {
3498         my $filename = shift;
3499
3500         open my $fd, '<', $filename;
3501         print map { to_utf8($_) } <$fd>;
3502         close $fd;
3503 }
3504
3505 ## ......................................................................
3506 ## mimetype related functions
3507
3508 sub mimetype_guess_file {
3509         my $filename = shift;
3510         my $mimemap = shift;
3511         -r $mimemap or return undef;
3512
3513         my %mimemap;
3514         open(my $mh, '<', $mimemap) or return undef;
3515         while (<$mh>) {
3516                 next if m/^#/; # skip comments
3517                 my ($mimetype, $exts) = split(/\t+/);
3518                 if (defined $exts) {
3519                         my @exts = split(/\s+/, $exts);
3520                         foreach my $ext (@exts) {
3521                                 $mimemap{$ext} = $mimetype;
3522                         }
3523                 }
3524         }
3525         close($mh);
3526
3527         $filename =~ /\.([^.]*)$/;
3528         return $mimemap{$1};
3529 }
3530
3531 sub mimetype_guess {
3532         my $filename = shift;
3533         my $mime;
3534         $filename =~ /\./ or return undef;
3535
3536         if ($mimetypes_file) {
3537                 my $file = $mimetypes_file;
3538                 if ($file !~ m!^/!) { # if it is relative path
3539                         # it is relative to project
3540                         $file = "$projectroot/$project/$file";
3541                 }
3542                 $mime = mimetype_guess_file($filename, $file);
3543         }
3544         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3545         return $mime;
3546 }
3547
3548 sub blob_mimetype {
3549         my $fd = shift;
3550         my $filename = shift;
3551
3552         if ($filename) {
3553                 my $mime = mimetype_guess($filename);
3554                 $mime and return $mime;
3555         }
3556
3557         # just in case
3558         return $default_blob_plain_mimetype unless $fd;
3559
3560         if (-T $fd) {
3561                 return 'text/plain';
3562         } elsif (! $filename) {
3563                 return 'application/octet-stream';
3564         } elsif ($filename =~ m/\.png$/i) {
3565                 return 'image/png';
3566         } elsif ($filename =~ m/\.gif$/i) {
3567                 return 'image/gif';
3568         } elsif ($filename =~ m/\.jpe?g$/i) {
3569                 return 'image/jpeg';
3570         } else {
3571                 return 'application/octet-stream';
3572         }
3573 }
3574
3575 sub blob_contenttype {
3576         my ($fd, $file_name, $type) = @_;
3577
3578         $type ||= blob_mimetype($fd, $file_name);
3579         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3580                 $type .= "; charset=$default_text_plain_charset";
3581         }
3582
3583         return $type;
3584 }
3585
3586 # guess file syntax for syntax highlighting; return undef if no highlighting
3587 # the name of syntax can (in the future) depend on syntax highlighter used
3588 sub guess_file_syntax {
3589         my ($highlight, $mimetype, $file_name) = @_;
3590         return undef unless ($highlight && defined $file_name);
3591         my $basename = basename($file_name, '.in');
3592         return $highlight_basename{$basename}
3593                 if exists $highlight_basename{$basename};
3594
3595         $basename =~ /\.([^.]*)$/;
3596         my $ext = $1 or return undef;
3597         return $highlight_ext{$ext}
3598                 if exists $highlight_ext{$ext};
3599
3600         return undef;
3601 }
3602
3603 # run highlighter and return FD of its output,
3604 # or return original FD if no highlighting
3605 sub run_highlighter {
3606         my ($fd, $highlight, $syntax) = @_;
3607         return $fd unless ($highlight && defined $syntax);
3608
3609         close $fd;
3610         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3611                   quote_command($highlight_bin).
3612                   " --replace-tabs=8 --fragment --syntax $syntax |"
3613                 or die_error(500, "Couldn't open file or run syntax highlighter");
3614         return $fd;
3615 }
3616
3617 ## ======================================================================
3618 ## functions printing HTML: header, footer, error page
3619
3620 sub get_page_title {
3621         my $title = to_utf8($site_name);
3622
3623         return $title unless (defined $project);
3624         $title .= " - " . to_utf8($project);
3625
3626         return $title unless (defined $action);
3627         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3628
3629         return $title unless (defined $file_name);
3630         $title .= " - " . esc_path($file_name);
3631         if ($action eq "tree" && $file_name !~ m|/$|) {
3632                 $title .= "/";
3633         }
3634
3635         return $title;
3636 }
3637
3638 sub print_feed_meta {
3639         if (defined $project) {
3640                 my %href_params = get_feed_info();
3641                 if (!exists $href_params{'-title'}) {
3642                         $href_params{'-title'} = 'log';
3643                 }
3644
3645                 foreach my $format (qw(RSS Atom)) {
3646                         my $type = lc($format);
3647                         my %link_attr = (
3648                                 '-rel' => 'alternate',
3649                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3650                                 '-type' => "application/$type+xml"
3651                         );
3652
3653                         $href_params{'action'} = $type;
3654                         $link_attr{'-href'} = href(%href_params);
3655                         print "<link ".
3656                               "rel=\"$link_attr{'-rel'}\" ".
3657                               "title=\"$link_attr{'-title'}\" ".
3658                               "href=\"$link_attr{'-href'}\" ".
3659                               "type=\"$link_attr{'-type'}\" ".
3660                               "/>\n";
3661
3662                         $href_params{'extra_options'} = '--no-merges';
3663                         $link_attr{'-href'} = href(%href_params);
3664                         $link_attr{'-title'} .= ' (no merges)';
3665                         print "<link ".
3666                               "rel=\"$link_attr{'-rel'}\" ".
3667                               "title=\"$link_attr{'-title'}\" ".
3668                               "href=\"$link_attr{'-href'}\" ".
3669                               "type=\"$link_attr{'-type'}\" ".
3670                               "/>\n";
3671                 }
3672
3673         } else {
3674                 printf('<link rel="alternate" title="%s projects list" '.
3675                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3676                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3677                 printf('<link rel="alternate" title="%s projects feeds" '.
3678                        'href="%s" type="text/x-opml" />'."\n",
3679                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3680         }
3681 }
3682
3683 sub git_header_html {
3684         my $status = shift || "200 OK";
3685         my $expires = shift;
3686         my %opts = @_;
3687
3688         my $title = get_page_title();
3689         my $content_type;
3690         # require explicit support from the UA if we are to send the page as
3691         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3692         # we have to do this because MSIE sometimes globs '*/*', pretending to
3693         # support xhtml+xml but choking when it gets what it asked for.
3694         if (defined $cgi->http('HTTP_ACCEPT') &&
3695             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3696             $cgi->Accept('application/xhtml+xml') != 0) {
3697                 $content_type = 'application/xhtml+xml';
3698         } else {
3699                 $content_type = 'text/html';
3700         }
3701         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3702                            -status=> $status, -expires => $expires)
3703                 unless ($opts{'-no_http_header'});
3704         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3705         print <<EOF;
3706 <?xml version="1.0" encoding="utf-8"?>
3707 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3708 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3709 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3710 <!-- git core binaries version $git_version -->
3711 <head>
3712 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3713 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3714 <meta name="robots" content="index, nofollow"/>
3715 <title>$title</title>
3716 EOF
3717         # the stylesheet, favicon etc urls won't work correctly with path_info
3718         # unless we set the appropriate base URL
3719         if ($ENV{'PATH_INFO'}) {
3720                 print "<base href=\"".esc_url($base_url)."\" />\n";
3721         }
3722         # print out each stylesheet that exist, providing backwards capability
3723         # for those people who defined $stylesheet in a config file
3724         if (defined $stylesheet) {
3725                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3726         } else {
3727                 foreach my $stylesheet (@stylesheets) {
3728                         next unless $stylesheet;
3729                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3730                 }
3731         }
3732         print_feed_meta()
3733                 if ($status eq '200 OK');
3734         if (defined $favicon) {
3735                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3736         }
3737
3738         print "</head>\n" .
3739               "<body>\n";
3740
3741         if (defined $site_header && -f $site_header) {
3742                 insert_file($site_header);
3743         }
3744
3745         print "<div class=\"page_header\">\n";
3746         if (defined $logo) {
3747                 print $cgi->a({-href => esc_url($logo_url),
3748                                -title => $logo_label},
3749                               $cgi->img({-src => esc_url($logo),
3750                                          -width => 72, -height => 27,
3751                                          -alt => "git",
3752                                          -class => "logo"}));
3753         }
3754         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3755         if (defined $project) {
3756                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3757                 if (defined $action) {
3758                         my $action_print = $action ;
3759                         if (defined $opts{-action_extra}) {
3760                                 $action_print = $cgi->a({-href => href(action=>$action)},
3761                                         $action);
3762                         }
3763                         print " / $action_print";
3764                 }
3765                 if (defined $opts{-action_extra}) {
3766                         print " / $opts{-action_extra}";
3767                 }
3768                 print "\n";
3769         }
3770         print "</div>\n";
3771
3772         my $have_search = gitweb_check_feature('search');
3773         if (defined $project && $have_search) {
3774                 if (!defined $searchtext) {
3775                         $searchtext = "";
3776                 }
3777                 my $search_hash;
3778                 if (defined $hash_base) {
3779                         $search_hash = $hash_base;
3780                 } elsif (defined $hash) {
3781                         $search_hash = $hash;
3782                 } else {
3783                         $search_hash = "HEAD";
3784                 }
3785                 my $action = $my_uri;
3786                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3787                 if ($use_pathinfo) {
3788                         $action .= "/".esc_url($project);
3789                 }
3790                 print $cgi->startform(-method => "get", -action => $action) .
3791                       "<div class=\"search\">\n" .
3792                       (!$use_pathinfo &&
3793                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3794                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3795                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3796                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3797                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3798                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3799                       " search:\n",
3800                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3801                       "<span title=\"Extended regular expression\">" .
3802                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3803                                      -checked => $search_use_regexp) .
3804                       "</span>" .
3805                       "</div>" .
3806                       $cgi->end_form() . "\n";
3807         }
3808 }
3809
3810 sub git_footer_html {
3811         my $feed_class = 'rss_logo';
3812
3813         print "<div class=\"page_footer\">\n";
3814         if (defined $project) {
3815                 my $descr = git_get_project_description($project);
3816                 if (defined $descr) {
3817                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3818                 }
3819
3820                 my %href_params = get_feed_info();
3821                 if (!%href_params) {
3822                         $feed_class .= ' generic';
3823                 }
3824                 $href_params{'-title'} ||= 'log';
3825
3826                 foreach my $format (qw(RSS Atom)) {
3827                         $href_params{'action'} = lc($format);
3828                         print $cgi->a({-href => href(%href_params),
3829                                       -title => "$href_params{'-title'} $format feed",
3830                                       -class => $feed_class}, $format)."\n";
3831                 }
3832
3833         } else {
3834                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3835                               -class => $feed_class}, "OPML") . " ";
3836                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3837                               -class => $feed_class}, "TXT") . "\n";
3838         }
3839         print "</div>\n"; # class="page_footer"
3840
3841         if (defined $t0 && gitweb_check_feature('timed')) {
3842                 print "<div id=\"generating_info\">\n";
3843                 print 'This page took '.
3844                       '<span id="generating_time" class="time_span">'.
3845                       tv_interval($t0, [ gettimeofday() ]).
3846                       ' seconds </span>'.
3847                       ' and '.
3848                       '<span id="generating_cmd">'.
3849                       $number_of_git_cmds.
3850                       '</span> git commands '.
3851                       " to generate.\n";
3852                 print "</div>\n"; # class="page_footer"
3853         }
3854
3855         if (defined $site_footer && -f $site_footer) {
3856                 insert_file($site_footer);
3857         }
3858
3859         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3860         if (defined $action &&
3861             $action eq 'blame_incremental') {
3862                 print qq!<script type="text/javascript">\n!.
3863                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3864                       qq!           "!. href() .qq!");\n!.
3865                       qq!</script>\n!;
3866         } elsif (gitweb_check_feature('javascript-actions')) {
3867                 print qq!<script type="text/javascript">\n!.
3868                       qq!window.onload = fixLinks;\n!.
3869                       qq!</script>\n!;
3870         }
3871
3872         print "</body>\n" .
3873               "</html>";
3874 }
3875
3876 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3877 # Example: die_error(404, 'Hash not found')
3878 # By convention, use the following status codes (as defined in RFC 2616):
3879 # 400: Invalid or missing CGI parameters, or
3880 #      requested object exists but has wrong type.
3881 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3882 #      this server or project.
3883 # 404: Requested object/revision/project doesn't exist.
3884 # 500: The server isn't configured properly, or
3885 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3886 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3887 # 503: The server is currently unavailable (because it is overloaded,
3888 #      or down for maintenance).  Generally, this is a temporary state.
3889 sub die_error {
3890         my $status = shift || 500;
3891         my $error = esc_html(shift) || "Internal Server Error";
3892         my $extra = shift;
3893         my %opts = @_;
3894
3895         my %http_responses = (
3896                 400 => '400 Bad Request',
3897                 403 => '403 Forbidden',
3898                 404 => '404 Not Found',
3899                 500 => '500 Internal Server Error',
3900                 503 => '503 Service Unavailable',
3901         );
3902         git_header_html($http_responses{$status}, undef, %opts);
3903         print <<EOF;
3904 <div class="page_body">
3905 <br /><br />
3906 $status - $error
3907 <br />
3908 EOF
3909         if (defined $extra) {
3910                 print "<hr />\n" .
3911                       "$extra\n";
3912         }
3913         print "</div>\n";
3914
3915         git_footer_html();
3916         goto DONE_GITWEB
3917                 unless ($opts{'-error_handler'});
3918 }
3919
3920 ## ----------------------------------------------------------------------
3921 ## functions printing or outputting HTML: navigation
3922
3923 sub git_print_page_nav {
3924         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3925         $extra = '' if !defined $extra; # pager or formats
3926
3927         my @navs = qw(summary shortlog log commit commitdiff tree);
3928         if ($suppress) {
3929                 @navs = grep { $_ ne $suppress } @navs;
3930         }
3931
3932         my %arg = map { $_ => {action=>$_} } @navs;
3933         if (defined $head) {
3934                 for (qw(commit commitdiff)) {
3935                         $arg{$_}{'hash'} = $head;
3936                 }
3937                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3938                         for (qw(shortlog log)) {
3939                                 $arg{$_}{'hash'} = $head;
3940                         }
3941                 }
3942         }
3943
3944         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3945         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3946
3947         my @actions = gitweb_get_feature('actions');
3948         my %repl = (
3949                 '%' => '%',
3950                 'n' => $project,         # project name
3951                 'f' => $git_dir,         # project path within filesystem
3952                 'h' => $treehead || '',  # current hash ('h' parameter)
3953                 'b' => $treebase || '',  # hash base ('hb' parameter)
3954         );
3955         while (@actions) {
3956                 my ($label, $link, $pos) = splice(@actions,0,3);
3957                 # insert
3958                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3959                 # munch munch
3960                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3961                 $arg{$label}{'_href'} = $link;
3962         }
3963
3964         print "<div class=\"page_nav\">\n" .
3965                 (join " | ",
3966                  map { $_ eq $current ?
3967                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3968                  } @navs);
3969         print "<br/>\n$extra<br/>\n" .
3970               "</div>\n";
3971 }
3972
3973 # returns a submenu for the nagivation of the refs views (tags, heads,
3974 # remotes) with the current view disabled and the remotes view only
3975 # available if the feature is enabled
3976 sub format_ref_views {
3977         my ($current) = @_;
3978         my @ref_views = qw{tags heads};
3979         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3980         return join " | ", map {
3981                 $_ eq $current ? $_ :
3982                 $cgi->a({-href => href(action=>$_)}, $_)
3983         } @ref_views
3984 }
3985
3986 sub format_paging_nav {
3987         my ($action, $page, $has_next_link) = @_;
3988         my $paging_nav;
3989
3990
3991         if ($page > 0) {
3992                 $paging_nav .=
3993                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3994                         " &sdot; " .
3995                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3996                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3997         } else {
3998                 $paging_nav .= "first &sdot; prev";
3999         }
4000
4001         if ($has_next_link) {
4002                 $paging_nav .= " &sdot; " .
4003                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4004                                  -accesskey => "n", -title => "Alt-n"}, "next");
4005         } else {
4006                 $paging_nav .= " &sdot; next";
4007         }
4008
4009         return $paging_nav;
4010 }
4011
4012 ## ......................................................................
4013 ## functions printing or outputting HTML: div
4014
4015 sub git_print_header_div {
4016         my ($action, $title, $hash, $hash_base) = @_;
4017         my %args = ();
4018
4019         $args{'action'} = $action;
4020         $args{'hash'} = $hash if $hash;
4021         $args{'hash_base'} = $hash_base if $hash_base;
4022
4023         print "<div class=\"header\">\n" .
4024               $cgi->a({-href => href(%args), -class => "title"},
4025               $title ? $title : $action) .
4026               "\n</div>\n";
4027 }
4028
4029 sub format_repo_url {
4030         my ($name, $url) = @_;
4031         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4032 }
4033
4034 # Group output by placing it in a DIV element and adding a header.
4035 # Options for start_div() can be provided by passing a hash reference as the
4036 # first parameter to the function.
4037 # Options to git_print_header_div() can be provided by passing an array
4038 # reference. This must follow the options to start_div if they are present.
4039 # The content can be a scalar, which is output as-is, a scalar reference, which
4040 # is output after html escaping, an IO handle passed either as *handle or
4041 # *handle{IO}, or a function reference. In the latter case all following
4042 # parameters will be taken as argument to the content function call.
4043 sub git_print_section {
4044         my ($div_args, $header_args, $content);
4045         my $arg = shift;
4046         if (ref($arg) eq 'HASH') {
4047                 $div_args = $arg;
4048                 $arg = shift;
4049         }
4050         if (ref($arg) eq 'ARRAY') {
4051                 $header_args = $arg;
4052                 $arg = shift;
4053         }
4054         $content = $arg;
4055
4056         print $cgi->start_div($div_args);
4057         git_print_header_div(@$header_args);
4058
4059         if (ref($content) eq 'CODE') {
4060                 $content->(@_);
4061         } elsif (ref($content) eq 'SCALAR') {
4062                 print esc_html($$content);
4063         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4064                 print <$content>;
4065         } elsif (!ref($content) && defined($content)) {
4066                 print $content;
4067         }
4068
4069         print $cgi->end_div;
4070 }
4071
4072 sub print_local_time {
4073         print format_local_time(@_);
4074 }
4075
4076 sub format_local_time {
4077         my $localtime = '';
4078         my %date = @_;
4079         if ($date{'hour_local'} < 6) {
4080                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4081                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4082         } else {
4083                 $localtime .= sprintf(" (%02d:%02d %s)",
4084                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4085         }
4086
4087         return $localtime;
4088 }
4089
4090 # Outputs the author name and date in long form
4091 sub git_print_authorship {
4092         my $co = shift;
4093         my %opts = @_;
4094         my $tag = $opts{-tag} || 'div';
4095         my $author = $co->{'author_name'};
4096
4097         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4098         print "<$tag class=\"author_date\">" .
4099               format_search_author($author, "author", esc_html($author)) .
4100               " [$ad{'rfc2822'}";
4101         print_local_time(%ad) if ($opts{-localtime});
4102         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4103                   . "</$tag>\n";
4104 }
4105
4106 # Outputs table rows containing the full author or committer information,
4107 # in the format expected for 'commit' view (& similar).
4108 # Parameters are a commit hash reference, followed by the list of people
4109 # to output information for. If the list is empty it defaults to both
4110 # author and committer.
4111 sub git_print_authorship_rows {
4112         my $co = shift;
4113         # too bad we can't use @people = @_ || ('author', 'committer')
4114         my @people = @_;
4115         @people = ('author', 'committer') unless @people;
4116         foreach my $who (@people) {
4117                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4118                 print "<tr><td>$who</td><td>" .
4119                       format_search_author($co->{"${who}_name"}, $who,
4120                                esc_html($co->{"${who}_name"})) . " " .
4121                       format_search_author($co->{"${who}_email"}, $who,
4122                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4123                       "</td><td rowspan=\"2\">" .
4124                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4125                       "</td></tr>\n" .
4126                       "<tr>" .
4127                       "<td></td><td> $wd{'rfc2822'}";
4128                 print_local_time(%wd);
4129                 print "</td>" .
4130                       "</tr>\n";
4131         }
4132 }
4133
4134 sub git_print_page_path {
4135         my $name = shift;
4136         my $type = shift;
4137         my $hb = shift;
4138
4139
4140         print "<div class=\"page_path\">";
4141         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4142                       -title => 'tree root'}, to_utf8("[$project]"));
4143         print " / ";
4144         if (defined $name) {
4145                 my @dirname = split '/', $name;
4146                 my $basename = pop @dirname;
4147                 my $fullname = '';
4148
4149                 foreach my $dir (@dirname) {
4150                         $fullname .= ($fullname ? '/' : '') . $dir;
4151                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4152                                                      hash_base=>$hb),
4153                                       -title => $fullname}, esc_path($dir));
4154                         print " / ";
4155                 }
4156                 if (defined $type && $type eq 'blob') {
4157                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4158                                                      hash_base=>$hb),
4159                                       -title => $name}, esc_path($basename));
4160                 } elsif (defined $type && $type eq 'tree') {
4161                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4162                                                      hash_base=>$hb),
4163                                       -title => $name}, esc_path($basename));
4164                         print " / ";
4165                 } else {
4166                         print esc_path($basename);
4167                 }
4168         }
4169         print "<br/></div>\n";
4170 }
4171
4172 sub git_print_log {
4173         my $log = shift;
4174         my %opts = @_;
4175
4176         if ($opts{'-remove_title'}) {
4177                 # remove title, i.e. first line of log
4178                 shift @$log;
4179         }
4180         # remove leading empty lines
4181         while (defined $log->[0] && $log->[0] eq "") {
4182                 shift @$log;
4183         }
4184
4185         # print log
4186         my $signoff = 0;
4187         my $empty = 0;
4188         foreach my $line (@$log) {
4189                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4190                         $signoff = 1;
4191                         $empty = 0;
4192                         if (! $opts{'-remove_signoff'}) {
4193                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4194                                 next;
4195                         } else {
4196                                 # remove signoff lines
4197                                 next;
4198                         }
4199                 } else {
4200                         $signoff = 0;
4201                 }
4202
4203                 # print only one empty line
4204                 # do not print empty line after signoff
4205                 if ($line eq "") {
4206                         next if ($empty || $signoff);
4207                         $empty = 1;
4208                 } else {
4209                         $empty = 0;
4210                 }
4211
4212                 print format_log_line_html($line) . "<br/>\n";
4213         }
4214
4215         if ($opts{'-final_empty_line'}) {
4216                 # end with single empty line
4217                 print "<br/>\n" unless $empty;
4218         }
4219 }
4220
4221 # return link target (what link points to)
4222 sub git_get_link_target {
4223         my $hash = shift;
4224         my $link_target;
4225
4226         # read link
4227         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4228                 or return;
4229         {
4230                 local $/ = undef;
4231                 $link_target = <$fd>;
4232         }
4233         close $fd
4234                 or return;
4235
4236         return $link_target;
4237 }
4238
4239 # given link target, and the directory (basedir) the link is in,
4240 # return target of link relative to top directory (top tree);
4241 # return undef if it is not possible (including absolute links).
4242 sub normalize_link_target {
4243         my ($link_target, $basedir) = @_;
4244
4245         # absolute symlinks (beginning with '/') cannot be normalized
4246         return if (substr($link_target, 0, 1) eq '/');
4247
4248         # normalize link target to path from top (root) tree (dir)
4249         my $path;
4250         if ($basedir) {
4251                 $path = $basedir . '/' . $link_target;
4252         } else {
4253                 # we are in top (root) tree (dir)
4254                 $path = $link_target;
4255         }
4256
4257         # remove //, /./, and /../
4258         my @path_parts;
4259         foreach my $part (split('/', $path)) {
4260                 # discard '.' and ''
4261                 next if (!$part || $part eq '.');
4262                 # handle '..'
4263                 if ($part eq '..') {
4264                         if (@path_parts) {
4265                                 pop @path_parts;
4266                         } else {
4267                                 # link leads outside repository (outside top dir)
4268                                 return;
4269                         }
4270                 } else {
4271                         push @path_parts, $part;
4272                 }
4273         }
4274         $path = join('/', @path_parts);
4275
4276         return $path;
4277 }
4278
4279 # print tree entry (row of git_tree), but without encompassing <tr> element
4280 sub git_print_tree_entry {
4281         my ($t, $basedir, $hash_base, $have_blame) = @_;
4282
4283         my %base_key = ();
4284         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4285
4286         # The format of a table row is: mode list link.  Where mode is
4287         # the mode of the entry, list is the name of the entry, an href,
4288         # and link is the action links of the entry.
4289
4290         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4291         if (exists $t->{'size'}) {
4292                 print "<td class=\"size\">$t->{'size'}</td>\n";
4293         }
4294         if ($t->{'type'} eq "blob") {
4295                 print "<td class=\"list\">" .
4296                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4297                                                file_name=>"$basedir$t->{'name'}", %base_key),
4298                                 -class => "list"}, esc_path($t->{'name'}));
4299                 if (S_ISLNK(oct $t->{'mode'})) {
4300                         my $link_target = git_get_link_target($t->{'hash'});
4301                         if ($link_target) {
4302                                 my $norm_target = normalize_link_target($link_target, $basedir);
4303                                 if (defined $norm_target) {
4304                                         print " -> " .
4305                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4306                                                                      file_name=>$norm_target),
4307                                                        -title => $norm_target}, esc_path($link_target));
4308                                 } else {
4309                                         print " -> " . esc_path($link_target);
4310                                 }
4311                         }
4312                 }
4313                 print "</td>\n";
4314                 print "<td class=\"link\">";
4315                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4316                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4317                               "blob");
4318                 if ($have_blame) {
4319                         print " | " .
4320                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4321                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4322                                       "blame");
4323                 }
4324                 if (defined $hash_base) {
4325                         print " | " .
4326                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4327                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4328                                       "history");
4329                 }
4330                 print " | " .
4331                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4332                                                file_name=>"$basedir$t->{'name'}")},
4333                                 "raw");
4334                 print "</td>\n";
4335
4336         } elsif ($t->{'type'} eq "tree") {
4337                 print "<td class=\"list\">";
4338                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4339                                              file_name=>"$basedir$t->{'name'}",
4340                                              %base_key)},
4341                               esc_path($t->{'name'}));
4342                 print "</td>\n";
4343                 print "<td class=\"link\">";
4344                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4345                                              file_name=>"$basedir$t->{'name'}",
4346                                              %base_key)},
4347                               "tree");
4348                 if (defined $hash_base) {
4349                         print " | " .
4350                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4351                                                      file_name=>"$basedir$t->{'name'}")},
4352                                       "history");
4353                 }
4354                 print "</td>\n";
4355         } else {
4356                 # unknown object: we can only present history for it
4357                 # (this includes 'commit' object, i.e. submodule support)
4358                 print "<td class=\"list\">" .
4359                       esc_path($t->{'name'}) .
4360                       "</td>\n";
4361                 print "<td class=\"link\">";
4362                 if (defined $hash_base) {
4363                         print $cgi->a({-href => href(action=>"history",
4364                                                      hash_base=>$hash_base,
4365                                                      file_name=>"$basedir$t->{'name'}")},
4366                                       "history");
4367                 }
4368                 print "</td>\n";
4369         }
4370 }
4371
4372 ## ......................................................................
4373 ## functions printing large fragments of HTML
4374
4375 # get pre-image filenames for merge (combined) diff
4376 sub fill_from_file_info {
4377         my ($diff, @parents) = @_;
4378
4379         $diff->{'from_file'} = [ ];
4380         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4381         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4382                 if ($diff->{'status'}[$i] eq 'R' ||
4383                     $diff->{'status'}[$i] eq 'C') {
4384                         $diff->{'from_file'}[$i] =
4385                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4386                 }
4387         }
4388
4389         return $diff;
4390 }
4391
4392 # is current raw difftree line of file deletion
4393 sub is_deleted {
4394         my $diffinfo = shift;
4395
4396         return $diffinfo->{'to_id'} eq ('0' x 40);
4397 }
4398
4399 # does patch correspond to [previous] difftree raw line
4400 # $diffinfo  - hashref of parsed raw diff format
4401 # $patchinfo - hashref of parsed patch diff format
4402 #              (the same keys as in $diffinfo)
4403 sub is_patch_split {
4404         my ($diffinfo, $patchinfo) = @_;
4405
4406         return defined $diffinfo && defined $patchinfo
4407                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4408 }
4409
4410
4411 sub git_difftree_body {
4412         my ($difftree, $hash, @parents) = @_;
4413         my ($parent) = $parents[0];
4414         my $have_blame = gitweb_check_feature('blame');
4415         print "<div class=\"list_head\">\n";
4416         if ($#{$difftree} > 10) {
4417                 print(($#{$difftree} + 1) . " files changed:\n");
4418         }
4419         print "</div>\n";
4420
4421         print "<table class=\"" .
4422               (@parents > 1 ? "combined " : "") .
4423               "diff_tree\">\n";
4424
4425         # header only for combined diff in 'commitdiff' view
4426         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4427         if ($has_header) {
4428                 # table header
4429                 print "<thead><tr>\n" .
4430                        "<th></th><th></th>\n"; # filename, patchN link
4431                 for (my $i = 0; $i < @parents; $i++) {
4432                         my $par = $parents[$i];
4433                         print "<th>" .
4434                               $cgi->a({-href => href(action=>"commitdiff",
4435                                                      hash=>$hash, hash_parent=>$par),
4436                                        -title => 'commitdiff to parent number ' .
4437                                                   ($i+1) . ': ' . substr($par,0,7)},
4438                                       $i+1) .
4439                               "&nbsp;</th>\n";
4440                 }
4441                 print "</tr></thead>\n<tbody>\n";
4442         }
4443
4444         my $alternate = 1;
4445         my $patchno = 0;
4446         foreach my $line (@{$difftree}) {
4447                 my $diff = parsed_difftree_line($line);
4448
4449                 if ($alternate) {
4450                         print "<tr class=\"dark\">\n";
4451                 } else {
4452                         print "<tr class=\"light\">\n";
4453                 }
4454                 $alternate ^= 1;
4455
4456                 if (exists $diff->{'nparents'}) { # combined diff
4457
4458                         fill_from_file_info($diff, @parents)
4459                                 unless exists $diff->{'from_file'};
4460
4461                         if (!is_deleted($diff)) {
4462                                 # file exists in the result (child) commit
4463                                 print "<td>" .
4464                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4465                                                              file_name=>$diff->{'to_file'},
4466                                                              hash_base=>$hash),
4467                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4468                                       "</td>\n";
4469                         } else {
4470                                 print "<td>" .
4471                                       esc_path($diff->{'to_file'}) .
4472                                       "</td>\n";
4473                         }
4474
4475                         if ($action eq 'commitdiff') {
4476                                 # link to patch
4477                                 $patchno++;
4478                                 print "<td class=\"link\">" .
4479                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4480                                               "patch") .
4481                                       " | " .
4482                                       "</td>\n";
4483                         }
4484
4485                         my $has_history = 0;
4486                         my $not_deleted = 0;
4487                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4488                                 my $hash_parent = $parents[$i];
4489                                 my $from_hash = $diff->{'from_id'}[$i];
4490                                 my $from_path = $diff->{'from_file'}[$i];
4491                                 my $status = $diff->{'status'}[$i];
4492
4493                                 $has_history ||= ($status ne 'A');
4494                                 $not_deleted ||= ($status ne 'D');
4495
4496                                 if ($status eq 'A') {
4497                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4498                                 } elsif ($status eq 'D') {
4499                                         print "<td class=\"link\">" .
4500                                               $cgi->a({-href => href(action=>"blob",
4501                                                                      hash_base=>$hash,
4502                                                                      hash=>$from_hash,
4503                                                                      file_name=>$from_path)},
4504                                                       "blob" . ($i+1)) .
4505                                               " | </td>\n";
4506                                 } else {
4507                                         if ($diff->{'to_id'} eq $from_hash) {
4508                                                 print "<td class=\"link nochange\">";
4509                                         } else {
4510                                                 print "<td class=\"link\">";
4511                                         }
4512                                         print $cgi->a({-href => href(action=>"blobdiff",
4513                                                                      hash=>$diff->{'to_id'},
4514                                                                      hash_parent=>$from_hash,
4515                                                                      hash_base=>$hash,
4516                                                                      hash_parent_base=>$hash_parent,
4517                                                                      file_name=>$diff->{'to_file'},
4518                                                                      file_parent=>$from_path)},
4519                                                       "diff" . ($i+1)) .
4520                                               " | </td>\n";
4521                                 }
4522                         }
4523
4524                         print "<td class=\"link\">";
4525                         if ($not_deleted) {
4526                                 print $cgi->a({-href => href(action=>"blob",
4527                                                              hash=>$diff->{'to_id'},
4528                                                              file_name=>$diff->{'to_file'},
4529                                                              hash_base=>$hash)},
4530                                               "blob");
4531                                 print " | " if ($has_history);
4532                         }
4533                         if ($has_history) {
4534                                 print $cgi->a({-href => href(action=>"history",
4535                                                              file_name=>$diff->{'to_file'},
4536                                                              hash_base=>$hash)},
4537                                               "history");
4538                         }
4539                         print "</td>\n";
4540
4541                         print "</tr>\n";
4542                         next; # instead of 'else' clause, to avoid extra indent
4543                 }
4544                 # else ordinary diff
4545
4546                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4547                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4548                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4549                         $to_mode_oct = oct $diff->{'to_mode'};
4550                         if (S_ISREG($to_mode_oct)) { # only for regular file
4551                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4552                         }
4553                         $to_file_type = file_type($diff->{'to_mode'});
4554                 }
4555                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4556                         $from_mode_oct = oct $diff->{'from_mode'};
4557                         if (S_ISREG($from_mode_oct)) { # only for regular file
4558                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4559                         }
4560                         $from_file_type = file_type($diff->{'from_mode'});
4561                 }
4562
4563                 if ($diff->{'status'} eq "A") { # created
4564                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4565                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4566                         $mode_chng   .= "]</span>";
4567                         print "<td>";
4568                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4569                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4570                                       -class => "list"}, esc_path($diff->{'file'}));
4571                         print "</td>\n";
4572                         print "<td>$mode_chng</td>\n";
4573                         print "<td class=\"link\">";
4574                         if ($action eq 'commitdiff') {
4575                                 # link to patch
4576                                 $patchno++;
4577                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4578                                               "patch") .
4579                                       " | ";
4580                         }
4581                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4582                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4583                                       "blob");
4584                         print "</td>\n";
4585
4586                 } elsif ($diff->{'status'} eq "D") { # deleted
4587                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4588                         print "<td>";
4589                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4590                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4591                                        -class => "list"}, esc_path($diff->{'file'}));
4592                         print "</td>\n";
4593                         print "<td>$mode_chng</td>\n";
4594                         print "<td class=\"link\">";
4595                         if ($action eq 'commitdiff') {
4596                                 # link to patch
4597                                 $patchno++;
4598                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4599                                               "patch") .
4600                                       " | ";
4601                         }
4602                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4603                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4604                                       "blob") . " | ";
4605                         if ($have_blame) {
4606                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4607                                                              file_name=>$diff->{'file'})},
4608                                               "blame") . " | ";
4609                         }
4610                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4611                                                      file_name=>$diff->{'file'})},
4612                                       "history");
4613                         print "</td>\n";
4614
4615                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4616                         my $mode_chnge = "";
4617                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4618                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4619                                 if ($from_file_type ne $to_file_type) {
4620                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4621                                 }
4622                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4623                                         if ($from_mode_str && $to_mode_str) {
4624                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4625                                         } elsif ($to_mode_str) {
4626                                                 $mode_chnge .= " mode: $to_mode_str";
4627                                         }
4628                                 }
4629                                 $mode_chnge .= "]</span>\n";
4630                         }
4631                         print "<td>";
4632                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4633                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4634                                       -class => "list"}, esc_path($diff->{'file'}));
4635                         print "</td>\n";
4636                         print "<td>$mode_chnge</td>\n";
4637                         print "<td class=\"link\">";
4638                         if ($action eq 'commitdiff') {
4639                                 # link to patch
4640                                 $patchno++;
4641                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4642                                               "patch") .
4643                                       " | ";
4644                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4645                                 # "commit" view and modified file (not onlu mode changed)
4646                                 print $cgi->a({-href => href(action=>"blobdiff",
4647                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4648                                                              hash_base=>$hash, hash_parent_base=>$parent,
4649                                                              file_name=>$diff->{'file'})},
4650                                               "diff") .
4651                                       " | ";
4652                         }
4653                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4654                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4655                                        "blob") . " | ";
4656                         if ($have_blame) {
4657                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4658                                                              file_name=>$diff->{'file'})},
4659                                               "blame") . " | ";
4660                         }
4661                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4662                                                      file_name=>$diff->{'file'})},
4663                                       "history");
4664                         print "</td>\n";
4665
4666                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4667                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4668                         my $nstatus = $status_name{$diff->{'status'}};
4669                         my $mode_chng = "";
4670                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4671                                 # mode also for directories, so we cannot use $to_mode_str
4672                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4673                         }
4674                         print "<td>" .
4675                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4676                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4677                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4678                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4679                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4680                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4681                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4682                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4683                               "<td class=\"link\">";
4684                         if ($action eq 'commitdiff') {
4685                                 # link to patch
4686                                 $patchno++;
4687                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4688                                               "patch") .
4689                                       " | ";
4690                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4691                                 # "commit" view and modified file (not only pure rename or copy)
4692                                 print $cgi->a({-href => href(action=>"blobdiff",
4693                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4694                                                              hash_base=>$hash, hash_parent_base=>$parent,
4695                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4696                                               "diff") .
4697                                       " | ";
4698                         }
4699                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4700                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4701                                       "blob") . " | ";
4702                         if ($have_blame) {
4703                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4704                                                              file_name=>$diff->{'to_file'})},
4705                                               "blame") . " | ";
4706                         }
4707                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4708                                                     file_name=>$diff->{'to_file'})},
4709                                       "history");
4710                         print "</td>\n";
4711
4712                 } # we should not encounter Unmerged (U) or Unknown (X) status
4713                 print "</tr>\n";
4714         }
4715         print "</tbody>" if $has_header;
4716         print "</table>\n";
4717 }
4718
4719 sub git_patchset_body {
4720         my ($fd, $difftree, $hash, @hash_parents) = @_;
4721         my ($hash_parent) = $hash_parents[0];
4722
4723         my $is_combined = (@hash_parents > 1);
4724         my $patch_idx = 0;
4725         my $patch_number = 0;
4726         my $patch_line;
4727         my $diffinfo;
4728         my $to_name;
4729         my (%from, %to);
4730
4731         print "<div class=\"patchset\">\n";
4732
4733         # skip to first patch
4734         while ($patch_line = <$fd>) {
4735                 chomp $patch_line;
4736
4737                 last if ($patch_line =~ m/^diff /);
4738         }
4739
4740  PATCH:
4741         while ($patch_line) {
4742
4743                 # parse "git diff" header line
4744                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4745                         # $1 is from_name, which we do not use
4746                         $to_name = unquote($2);
4747                         $to_name =~ s!^b/!!;
4748                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4749                         # $1 is 'cc' or 'combined', which we do not use
4750                         $to_name = unquote($2);
4751                 } else {
4752                         $to_name = undef;
4753                 }
4754
4755                 # check if current patch belong to current raw line
4756                 # and parse raw git-diff line if needed
4757                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4758                         # this is continuation of a split patch
4759                         print "<div class=\"patch cont\">\n";
4760                 } else {
4761                         # advance raw git-diff output if needed
4762                         $patch_idx++ if defined $diffinfo;
4763
4764                         # read and prepare patch information
4765                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4766
4767                         # compact combined diff output can have some patches skipped
4768                         # find which patch (using pathname of result) we are at now;
4769                         if ($is_combined) {
4770                                 while ($to_name ne $diffinfo->{'to_file'}) {
4771                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4772                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4773                                               "</div>\n";  # class="patch"
4774
4775                                         $patch_idx++;
4776                                         $patch_number++;
4777
4778                                         last if $patch_idx > $#$difftree;
4779                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4780                                 }
4781                         }
4782
4783                         # modifies %from, %to hashes
4784                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4785
4786                         # this is first patch for raw difftree line with $patch_idx index
4787                         # we index @$difftree array from 0, but number patches from 1
4788                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4789                 }
4790
4791                 # git diff header
4792                 #assert($patch_line =~ m/^diff /) if DEBUG;
4793                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4794                 $patch_number++;
4795                 # print "git diff" header
4796                 print format_git_diff_header_line($patch_line, $diffinfo,
4797                                                   \%from, \%to);
4798
4799                 # print extended diff header
4800                 print "<div class=\"diff extended_header\">\n";
4801         EXTENDED_HEADER:
4802                 while ($patch_line = <$fd>) {
4803                         chomp $patch_line;
4804
4805                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4806
4807                         print format_extended_diff_header_line($patch_line, $diffinfo,
4808                                                                \%from, \%to);
4809                 }
4810                 print "</div>\n"; # class="diff extended_header"
4811
4812                 # from-file/to-file diff header
4813                 if (! $patch_line) {
4814                         print "</div>\n"; # class="patch"
4815                         last PATCH;
4816                 }
4817                 next PATCH if ($patch_line =~ m/^diff /);
4818                 #assert($patch_line =~ m/^---/) if DEBUG;
4819
4820                 my $last_patch_line = $patch_line;
4821                 $patch_line = <$fd>;
4822                 chomp $patch_line;
4823                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4824
4825                 print format_diff_from_to_header($last_patch_line, $patch_line,
4826                                                  $diffinfo, \%from, \%to,
4827                                                  @hash_parents);
4828
4829                 # the patch itself
4830         LINE:
4831                 while ($patch_line = <$fd>) {
4832                         chomp $patch_line;
4833
4834                         next PATCH if ($patch_line =~ m/^diff /);
4835
4836                         print format_diff_line($patch_line, \%from, \%to);
4837                 }
4838
4839         } continue {
4840                 print "</div>\n"; # class="patch"
4841         }
4842
4843         # for compact combined (--cc) format, with chunk and patch simplification
4844         # the patchset might be empty, but there might be unprocessed raw lines
4845         for (++$patch_idx if $patch_number > 0;
4846              $patch_idx < @$difftree;
4847              ++$patch_idx) {
4848                 # read and prepare patch information
4849                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4850
4851                 # generate anchor for "patch" links in difftree / whatchanged part
4852                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4853                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4854                       "</div>\n";  # class="patch"
4855
4856                 $patch_number++;
4857         }
4858
4859         if ($patch_number == 0) {
4860                 if (@hash_parents > 1) {
4861                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4862                 } else {
4863                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4864                 }
4865         }
4866
4867         print "</div>\n"; # class="patchset"
4868 }
4869
4870 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4871
4872 # fills project list info (age, description, owner, forks) for each
4873 # project in the list, removing invalid projects from returned list
4874 # NOTE: modifies $projlist, but does not remove entries from it
4875 sub fill_project_list_info {
4876         my $projlist = shift;
4877         my @projects;
4878
4879         my $show_ctags = gitweb_check_feature('ctags');
4880  PROJECT:
4881         foreach my $pr (@$projlist) {
4882                 my (@activity) = git_get_last_activity($pr->{'path'});
4883                 unless (@activity) {
4884                         next PROJECT;
4885                 }
4886                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4887                 if (!defined $pr->{'descr'}) {
4888                         my $descr = git_get_project_description($pr->{'path'}) || "";
4889                         $descr = to_utf8($descr);
4890                         $pr->{'descr_long'} = $descr;
4891                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4892                 }
4893                 if (!defined $pr->{'owner'}) {
4894                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4895                 }
4896                 if ($show_ctags) {
4897                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4898                 }
4899                 push @projects, $pr;
4900         }
4901
4902         return @projects;
4903 }
4904
4905 sub sort_projects_list {
4906         my ($projlist, $order) = @_;
4907         my @projects;
4908
4909         my %order_info = (
4910                 project => { key => 'path', type => 'str' },
4911                 descr => { key => 'descr_long', type => 'str' },
4912                 owner => { key => 'owner', type => 'str' },
4913                 age => { key => 'age', type => 'num' }
4914         );
4915         my $oi = $order_info{$order};
4916         return @$projlist unless defined $oi;
4917         if ($oi->{'type'} eq 'str') {
4918                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4919         } else {
4920                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4921         }
4922
4923         return @projects;
4924 }
4925
4926 # print 'sort by' <th> element, generating 'sort by $name' replay link
4927 # if that order is not selected
4928 sub print_sort_th {
4929         print format_sort_th(@_);
4930 }
4931
4932 sub format_sort_th {
4933         my ($name, $order, $header) = @_;
4934         my $sort_th = "";
4935         $header ||= ucfirst($name);
4936
4937         if ($order eq $name) {
4938                 $sort_th .= "<th>$header</th>\n";
4939         } else {
4940                 $sort_th .= "<th>" .
4941                             $cgi->a({-href => href(-replay=>1, order=>$name),
4942                                      -class => "header"}, $header) .
4943                             "</th>\n";
4944         }
4945
4946         return $sort_th;
4947 }
4948
4949 sub git_project_list_body {
4950         # actually uses global variable $project
4951         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4952         my @projects = @$projlist;
4953
4954         my $check_forks = gitweb_check_feature('forks');
4955         my $show_ctags  = gitweb_check_feature('ctags');
4956         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
4957         $check_forks = undef
4958                 if ($tagfilter || $searchtext);
4959
4960         # filtering out forks before filling info allows to do less work
4961         @projects = filter_forks_from_projects_list(\@projects)
4962                 if ($check_forks);
4963         @projects = fill_project_list_info(\@projects);
4964         # searching projects require filling to be run before it
4965         @projects = search_projects_list(\@projects,
4966                                          'searchtext' => $searchtext,
4967                                          'tagfilter'  => $tagfilter)
4968                 if ($tagfilter || $searchtext);
4969
4970         $order ||= $default_projects_order;
4971         $from = 0 unless defined $from;
4972         $to = $#projects if (!defined $to || $#projects < $to);
4973
4974         # short circuit
4975         if ($from > $to) {
4976                 print "<center>\n".
4977                       "<b>No such projects found</b><br />\n".
4978                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
4979                       "</center>\n<br />\n";
4980                 return;
4981         }
4982
4983         @projects = sort_projects_list(\@projects, $order);
4984
4985         if ($show_ctags) {
4986                 my $ctags = git_gather_all_ctags(\@projects);
4987                 my $cloud = git_populate_project_tagcloud($ctags);
4988                 print git_show_project_tagcloud($cloud, 64);
4989         }
4990
4991         print "<table class=\"project_list\">\n";
4992         unless ($no_header) {
4993                 print "<tr>\n";
4994                 if ($check_forks) {
4995                         print "<th></th>\n";
4996                 }
4997                 print_sort_th('project', $order, 'Project');
4998                 print_sort_th('descr', $order, 'Description');
4999                 print_sort_th('owner', $order, 'Owner');
5000                 print_sort_th('age', $order, 'Last Change');
5001                 print "<th></th>\n" . # for links
5002                       "</tr>\n";
5003         }
5004         my $alternate = 1;
5005         for (my $i = $from; $i <= $to; $i++) {
5006                 my $pr = $projects[$i];
5007
5008                 if ($alternate) {
5009                         print "<tr class=\"dark\">\n";
5010                 } else {
5011                         print "<tr class=\"light\">\n";
5012                 }
5013                 $alternate ^= 1;
5014
5015                 if ($check_forks) {
5016                         print "<td>";
5017                         if ($pr->{'forks'}) {
5018                                 my $nforks = scalar @{$pr->{'forks'}};
5019                                 if ($nforks > 0) {
5020                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5021                                                        -title => "$nforks forks"}, "+");
5022                                 } else {
5023                                         print $cgi->span({-title => "$nforks forks"}, "+");
5024                                 }
5025                         }
5026                         print "</td>\n";
5027                 }
5028                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5029                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5030                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5031                                         -class => "list", -title => $pr->{'descr_long'}},
5032                                         esc_html($pr->{'descr'})) . "</td>\n" .
5033                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5034                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5035                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5036                       "<td class=\"link\">" .
5037                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5038                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5039                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5040                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5041                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5042                       "</td>\n" .
5043                       "</tr>\n";
5044         }
5045         if (defined $extra) {
5046                 print "<tr>\n";
5047                 if ($check_forks) {
5048                         print "<td></td>\n";
5049                 }
5050                 print "<td colspan=\"5\">$extra</td>\n" .
5051                       "</tr>\n";
5052         }
5053         print "</table>\n";
5054 }
5055
5056 sub git_log_body {
5057         # uses global variable $project
5058         my ($commitlist, $from, $to, $refs, $extra) = @_;
5059
5060         $from = 0 unless defined $from;
5061         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5062
5063         for (my $i = 0; $i <= $to; $i++) {
5064                 my %co = %{$commitlist->[$i]};
5065                 next if !%co;
5066                 my $commit = $co{'id'};
5067                 my $ref = format_ref_marker($refs, $commit);
5068                 git_print_header_div('commit',
5069                                "<span class=\"age\">$co{'age_string'}</span>" .
5070                                esc_html($co{'title'}) . $ref,
5071                                $commit);
5072                 print "<div class=\"title_text\">\n" .
5073                       "<div class=\"log_link\">\n" .
5074                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5075                       " | " .
5076                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5077                       " | " .
5078                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5079                       "<br/>\n" .
5080                       "</div>\n";
5081                       git_print_authorship(\%co, -tag => 'span');
5082                       print "<br/>\n</div>\n";
5083
5084                 print "<div class=\"log_body\">\n";
5085                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5086                 print "</div>\n";
5087         }
5088         if ($extra) {
5089                 print "<div class=\"page_nav\">\n";
5090                 print "$extra\n";
5091                 print "</div>\n";
5092         }
5093 }
5094
5095 sub git_shortlog_body {
5096         # uses global variable $project
5097         my ($commitlist, $from, $to, $refs, $extra) = @_;
5098
5099         $from = 0 unless defined $from;
5100         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5101
5102         print "<table class=\"shortlog\">\n";
5103         my $alternate = 1;
5104         for (my $i = $from; $i <= $to; $i++) {
5105                 my %co = %{$commitlist->[$i]};
5106                 my $commit = $co{'id'};
5107                 my $ref = format_ref_marker($refs, $commit);
5108                 if ($alternate) {
5109                         print "<tr class=\"dark\">\n";
5110                 } else {
5111                         print "<tr class=\"light\">\n";
5112                 }
5113                 $alternate ^= 1;
5114                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5115                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5116                       format_author_html('td', \%co, 10) . "<td>";
5117                 print format_subject_html($co{'title'}, $co{'title_short'},
5118                                           href(action=>"commit", hash=>$commit), $ref);
5119                 print "</td>\n" .
5120                       "<td class=\"link\">" .
5121                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5122                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5123                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5124                 my $snapshot_links = format_snapshot_links($commit);
5125                 if (defined $snapshot_links) {
5126                         print " | " . $snapshot_links;
5127                 }
5128                 print "</td>\n" .
5129                       "</tr>\n";
5130         }
5131         if (defined $extra) {
5132                 print "<tr>\n" .
5133                       "<td colspan=\"4\">$extra</td>\n" .
5134                       "</tr>\n";
5135         }
5136         print "</table>\n";
5137 }
5138
5139 sub git_history_body {
5140         # Warning: assumes constant type (blob or tree) during history
5141         my ($commitlist, $from, $to, $refs, $extra,
5142             $file_name, $file_hash, $ftype) = @_;
5143
5144         $from = 0 unless defined $from;
5145         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5146
5147         print "<table class=\"history\">\n";
5148         my $alternate = 1;
5149         for (my $i = $from; $i <= $to; $i++) {
5150                 my %co = %{$commitlist->[$i]};
5151                 if (!%co) {
5152                         next;
5153                 }
5154                 my $commit = $co{'id'};
5155
5156                 my $ref = format_ref_marker($refs, $commit);
5157
5158                 if ($alternate) {
5159                         print "<tr class=\"dark\">\n";
5160                 } else {
5161                         print "<tr class=\"light\">\n";
5162                 }
5163                 $alternate ^= 1;
5164                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5165         # shortlog:   format_author_html('td', \%co, 10)
5166                       format_author_html('td', \%co, 15, 3) . "<td>";
5167                 # originally git_history used chop_str($co{'title'}, 50)
5168                 print format_subject_html($co{'title'}, $co{'title_short'},
5169                                           href(action=>"commit", hash=>$commit), $ref);
5170                 print "</td>\n" .
5171                       "<td class=\"link\">" .
5172                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5173                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5174
5175                 if ($ftype eq 'blob') {
5176                         my $blob_current = $file_hash;
5177                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5178                         if (defined $blob_current && defined $blob_parent &&
5179                                         $blob_current ne $blob_parent) {
5180                                 print " | " .
5181                                         $cgi->a({-href => href(action=>"blobdiff",
5182                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5183                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5184                                                                file_name=>$file_name)},
5185                                                 "diff to current");
5186                         }
5187                 }
5188                 print "</td>\n" .
5189                       "</tr>\n";
5190         }
5191         if (defined $extra) {
5192                 print "<tr>\n" .
5193                       "<td colspan=\"4\">$extra</td>\n" .
5194                       "</tr>\n";
5195         }
5196         print "</table>\n";
5197 }
5198
5199 sub git_tags_body {
5200         # uses global variable $project
5201         my ($taglist, $from, $to, $extra) = @_;
5202         $from = 0 unless defined $from;
5203         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5204
5205         print "<table class=\"tags\">\n";
5206         my $alternate = 1;
5207         for (my $i = $from; $i <= $to; $i++) {
5208                 my $entry = $taglist->[$i];
5209                 my %tag = %$entry;
5210                 my $comment = $tag{'subject'};
5211                 my $comment_short;
5212                 if (defined $comment) {
5213                         $comment_short = chop_str($comment, 30, 5);
5214                 }
5215                 if ($alternate) {
5216                         print "<tr class=\"dark\">\n";
5217                 } else {
5218                         print "<tr class=\"light\">\n";
5219                 }
5220                 $alternate ^= 1;
5221                 if (defined $tag{'age'}) {
5222                         print "<td><i>$tag{'age'}</i></td>\n";
5223                 } else {
5224                         print "<td></td>\n";
5225                 }
5226                 print "<td>" .
5227                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5228                                -class => "list name"}, esc_html($tag{'name'})) .
5229                       "</td>\n" .
5230                       "<td>";
5231                 if (defined $comment) {
5232                         print format_subject_html($comment, $comment_short,
5233                                                   href(action=>"tag", hash=>$tag{'id'}));
5234                 }
5235                 print "</td>\n" .
5236                       "<td class=\"selflink\">";
5237                 if ($tag{'type'} eq "tag") {
5238                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5239                 } else {
5240                         print "&nbsp;";
5241                 }
5242                 print "</td>\n" .
5243                       "<td class=\"link\">" . " | " .
5244                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5245                 if ($tag{'reftype'} eq "commit") {
5246                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5247                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5248                 } elsif ($tag{'reftype'} eq "blob") {
5249                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5250                 }
5251                 print "</td>\n" .
5252                       "</tr>";
5253         }
5254         if (defined $extra) {
5255                 print "<tr>\n" .
5256                       "<td colspan=\"5\">$extra</td>\n" .
5257                       "</tr>\n";
5258         }
5259         print "</table>\n";
5260 }
5261
5262 sub git_heads_body {
5263         # uses global variable $project
5264         my ($headlist, $head, $from, $to, $extra) = @_;
5265         $from = 0 unless defined $from;
5266         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5267
5268         print "<table class=\"heads\">\n";
5269         my $alternate = 1;
5270         for (my $i = $from; $i <= $to; $i++) {
5271                 my $entry = $headlist->[$i];
5272                 my %ref = %$entry;
5273                 my $curr = $ref{'id'} eq $head;
5274                 if ($alternate) {
5275                         print "<tr class=\"dark\">\n";
5276                 } else {
5277                         print "<tr class=\"light\">\n";
5278                 }
5279                 $alternate ^= 1;
5280                 print "<td><i>$ref{'age'}</i></td>\n" .
5281                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5282                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5283                                -class => "list name"},esc_html($ref{'name'})) .
5284                       "</td>\n" .
5285                       "<td class=\"link\">" .
5286                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5287                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5288                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5289                       "</td>\n" .
5290                       "</tr>";
5291         }
5292         if (defined $extra) {
5293                 print "<tr>\n" .
5294                       "<td colspan=\"3\">$extra</td>\n" .
5295                       "</tr>\n";
5296         }
5297         print "</table>\n";
5298 }
5299
5300 # Display a single remote block
5301 sub git_remote_block {
5302         my ($remote, $rdata, $limit, $head) = @_;
5303
5304         my $heads = $rdata->{'heads'};
5305         my $fetch = $rdata->{'fetch'};
5306         my $push = $rdata->{'push'};
5307
5308         my $urls_table = "<table class=\"projects_list\">\n" ;
5309
5310         if (defined $fetch) {
5311                 if ($fetch eq $push) {
5312                         $urls_table .= format_repo_url("URL", $fetch);
5313                 } else {
5314                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5315                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5316                 }
5317         } elsif (defined $push) {
5318                 $urls_table .= format_repo_url("Push URL", $push);
5319         } else {
5320                 $urls_table .= format_repo_url("", "No remote URL");
5321         }
5322
5323         $urls_table .= "</table>\n";
5324
5325         my $dots;
5326         if (defined $limit && $limit < @$heads) {
5327                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5328         }
5329
5330         print $urls_table;
5331         git_heads_body($heads, $head, 0, $limit, $dots);
5332 }
5333
5334 # Display a list of remote names with the respective fetch and push URLs
5335 sub git_remotes_list {
5336         my ($remotedata, $limit) = @_;
5337         print "<table class=\"heads\">\n";
5338         my $alternate = 1;
5339         my @remotes = sort keys %$remotedata;
5340
5341         my $limited = $limit && $limit < @remotes;
5342
5343         $#remotes = $limit - 1 if $limited;
5344
5345         while (my $remote = shift @remotes) {
5346                 my $rdata = $remotedata->{$remote};
5347                 my $fetch = $rdata->{'fetch'};
5348                 my $push = $rdata->{'push'};
5349                 if ($alternate) {
5350                         print "<tr class=\"dark\">\n";
5351                 } else {
5352                         print "<tr class=\"light\">\n";
5353                 }
5354                 $alternate ^= 1;
5355                 print "<td>" .
5356                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5357                                -class=> "list name"},esc_html($remote)) .
5358                       "</td>";
5359                 print "<td class=\"link\">" .
5360                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5361                       " | " .
5362                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5363                       "</td>";
5364
5365                 print "</tr>\n";
5366         }
5367
5368         if ($limited) {
5369                 print "<tr>\n" .
5370                       "<td colspan=\"3\">" .
5371                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5372                       "</td>\n" . "</tr>\n";
5373         }
5374
5375         print "</table>";
5376 }
5377
5378 # Display remote heads grouped by remote, unless there are too many
5379 # remotes, in which case we only display the remote names
5380 sub git_remotes_body {
5381         my ($remotedata, $limit, $head) = @_;
5382         if ($limit and $limit < keys %$remotedata) {
5383                 git_remotes_list($remotedata, $limit);
5384         } else {
5385                 fill_remote_heads($remotedata);
5386                 while (my ($remote, $rdata) = each %$remotedata) {
5387                         git_print_section({-class=>"remote", -id=>$remote},
5388                                 ["remotes", $remote, $remote], sub {
5389                                         git_remote_block($remote, $rdata, $limit, $head);
5390                                 });
5391                 }
5392         }
5393 }
5394
5395 sub git_search_grep_body {
5396         my ($commitlist, $from, $to, $extra) = @_;
5397         $from = 0 unless defined $from;
5398         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5399
5400         print "<table class=\"commit_search\">\n";
5401         my $alternate = 1;
5402         for (my $i = $from; $i <= $to; $i++) {
5403                 my %co = %{$commitlist->[$i]};
5404                 if (!%co) {
5405                         next;
5406                 }
5407                 my $commit = $co{'id'};
5408                 if ($alternate) {
5409                         print "<tr class=\"dark\">\n";
5410                 } else {
5411                         print "<tr class=\"light\">\n";
5412                 }
5413                 $alternate ^= 1;
5414                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5415                       format_author_html('td', \%co, 15, 5) .
5416                       "<td>" .
5417                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5418                                -class => "list subject"},
5419                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5420                 my $comment = $co{'comment'};
5421                 foreach my $line (@$comment) {
5422                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5423                                 my ($lead, $match, $trail) = ($1, $2, $3);
5424                                 $match = chop_str($match, 70, 5, 'center');
5425                                 my $contextlen = int((80 - length($match))/2);
5426                                 $contextlen = 30 if ($contextlen > 30);
5427                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5428                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5429
5430                                 $lead  = esc_html($lead);
5431                                 $match = esc_html($match);
5432                                 $trail = esc_html($trail);
5433
5434                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5435                         }
5436                 }
5437                 print "</td>\n" .
5438                       "<td class=\"link\">" .
5439                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5440                       " | " .
5441                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5442                       " | " .
5443                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5444                 print "</td>\n" .
5445                       "</tr>\n";
5446         }
5447         if (defined $extra) {
5448                 print "<tr>\n" .
5449                       "<td colspan=\"3\">$extra</td>\n" .
5450                       "</tr>\n";
5451         }
5452         print "</table>\n";
5453 }
5454
5455 ## ======================================================================
5456 ## ======================================================================
5457 ## actions
5458
5459 sub git_project_list {
5460         my $order = $input_params{'order'};
5461         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5462                 die_error(400, "Unknown order parameter");
5463         }
5464
5465         my @list = git_get_projects_list();
5466         if (!@list) {
5467                 die_error(404, "No projects found");
5468         }
5469
5470         git_header_html();
5471         if (defined $home_text && -f $home_text) {
5472                 print "<div class=\"index_include\">\n";
5473                 insert_file($home_text);
5474                 print "</div>\n";
5475         }
5476         print $cgi->startform(-method => "get") .
5477               "<p class=\"projsearch\">Search:\n" .
5478               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5479               "</p>" .
5480               $cgi->end_form() . "\n";
5481         git_project_list_body(\@list, $order);
5482         git_footer_html();
5483 }
5484
5485 sub git_forks {
5486         my $order = $input_params{'order'};
5487         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5488                 die_error(400, "Unknown order parameter");
5489         }
5490
5491         my @list = git_get_projects_list($project);
5492         if (!@list) {
5493                 die_error(404, "No forks found");
5494         }
5495
5496         git_header_html();
5497         git_print_page_nav('','');
5498         git_print_header_div('summary', "$project forks");
5499         git_project_list_body(\@list, $order);
5500         git_footer_html();
5501 }
5502
5503 sub git_project_index {
5504         my @projects = git_get_projects_list();
5505         if (!@projects) {
5506                 die_error(404, "No projects found");
5507         }
5508
5509         print $cgi->header(
5510                 -type => 'text/plain',
5511                 -charset => 'utf-8',
5512                 -content_disposition => 'inline; filename="index.aux"');
5513
5514         foreach my $pr (@projects) {
5515                 if (!exists $pr->{'owner'}) {
5516                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5517                 }
5518
5519                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5520                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5521                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5522                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5523                 $path  =~ s/ /\+/g;
5524                 $owner =~ s/ /\+/g;
5525
5526                 print "$path $owner\n";
5527         }
5528 }
5529
5530 sub git_summary {
5531         my $descr = git_get_project_description($project) || "none";
5532         my %co = parse_commit("HEAD");
5533         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5534         my $head = $co{'id'};
5535         my $remote_heads = gitweb_check_feature('remote_heads');
5536
5537         my $owner = git_get_project_owner($project);
5538
5539         my $refs = git_get_references();
5540         # These get_*_list functions return one more to allow us to see if
5541         # there are more ...
5542         my @taglist  = git_get_tags_list(16);
5543         my @headlist = git_get_heads_list(16);
5544         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5545         my @forklist;
5546         my $check_forks = gitweb_check_feature('forks');
5547
5548         if ($check_forks) {
5549                 # find forks of a project
5550                 @forklist = git_get_projects_list($project);
5551                 # filter out forks of forks
5552                 @forklist = filter_forks_from_projects_list(\@forklist)
5553                         if (@forklist);
5554         }
5555
5556         git_header_html();
5557         git_print_page_nav('summary','', $head);
5558
5559         print "<div class=\"title\">&nbsp;</div>\n";
5560         print "<table class=\"projects_list\">\n" .
5561               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5562               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5563         if (defined $cd{'rfc2822'}) {
5564                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5565         }
5566
5567         # use per project git URL list in $projectroot/$project/cloneurl
5568         # or make project git URL from git base URL and project name
5569         my $url_tag = "URL";
5570         my @url_list = git_get_project_url_list($project);
5571         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5572         foreach my $git_url (@url_list) {
5573                 next unless $git_url;
5574                 print format_repo_url($url_tag, $git_url);
5575                 $url_tag = "";
5576         }
5577
5578         # Tag cloud
5579         my $show_ctags = gitweb_check_feature('ctags');
5580         if ($show_ctags) {
5581                 my $ctags = git_get_project_ctags($project);
5582                 if (%$ctags) {
5583                         # without ability to add tags, don't show if there are none
5584                         my $cloud = git_populate_project_tagcloud($ctags);
5585                         print "<tr id=\"metadata_ctags\">" .
5586                               "<td>content tags</td>" .
5587                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5588                               "</tr>\n";
5589                 }
5590         }
5591
5592         print "</table>\n";
5593
5594         # If XSS prevention is on, we don't include README.html.
5595         # TODO: Allow a readme in some safe format.
5596         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5597                 print "<div class=\"title\">readme</div>\n" .
5598                       "<div class=\"readme\">\n";
5599                 insert_file("$projectroot/$project/README.html");
5600                 print "\n</div>\n"; # class="readme"
5601         }
5602
5603         # we need to request one more than 16 (0..15) to check if
5604         # those 16 are all
5605         my @commitlist = $head ? parse_commits($head, 17) : ();
5606         if (@commitlist) {
5607                 git_print_header_div('shortlog');
5608                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5609                                   $#commitlist <=  15 ? undef :
5610                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5611         }
5612
5613         if (@taglist) {
5614                 git_print_header_div('tags');
5615                 git_tags_body(\@taglist, 0, 15,
5616                               $#taglist <=  15 ? undef :
5617                               $cgi->a({-href => href(action=>"tags")}, "..."));
5618         }
5619
5620         if (@headlist) {
5621                 git_print_header_div('heads');
5622                 git_heads_body(\@headlist, $head, 0, 15,
5623                                $#headlist <= 15 ? undef :
5624                                $cgi->a({-href => href(action=>"heads")}, "..."));
5625         }
5626
5627         if (%remotedata) {
5628                 git_print_header_div('remotes');
5629                 git_remotes_body(\%remotedata, 15, $head);
5630         }
5631
5632         if (@forklist) {
5633                 git_print_header_div('forks');
5634                 git_project_list_body(\@forklist, 'age', 0, 15,
5635                                       $#forklist <= 15 ? undef :
5636                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5637                                       'no_header');
5638         }
5639
5640         git_footer_html();
5641 }
5642
5643 sub git_tag {
5644         my %tag = parse_tag($hash);
5645
5646         if (! %tag) {
5647                 die_error(404, "Unknown tag object");
5648         }
5649
5650         my $head = git_get_head_hash($project);
5651         git_header_html();
5652         git_print_page_nav('','', $head,undef,$head);
5653         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5654         print "<div class=\"title_text\">\n" .
5655               "<table class=\"object_header\">\n" .
5656               "<tr>\n" .
5657               "<td>object</td>\n" .
5658               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5659                                $tag{'object'}) . "</td>\n" .
5660               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5661                                               $tag{'type'}) . "</td>\n" .
5662               "</tr>\n";
5663         if (defined($tag{'author'})) {
5664                 git_print_authorship_rows(\%tag, 'author');
5665         }
5666         print "</table>\n\n" .
5667               "</div>\n";
5668         print "<div class=\"page_body\">";
5669         my $comment = $tag{'comment'};
5670         foreach my $line (@$comment) {
5671                 chomp $line;
5672                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5673         }
5674         print "</div>\n";
5675         git_footer_html();
5676 }
5677
5678 sub git_blame_common {
5679         my $format = shift || 'porcelain';
5680         if ($format eq 'porcelain' && $cgi->param('js')) {
5681                 $format = 'incremental';
5682                 $action = 'blame_incremental'; # for page title etc
5683         }
5684
5685         # permissions
5686         gitweb_check_feature('blame')
5687                 or die_error(403, "Blame view not allowed");
5688
5689         # error checking
5690         die_error(400, "No file name given") unless $file_name;
5691         $hash_base ||= git_get_head_hash($project);
5692         die_error(404, "Couldn't find base commit") unless $hash_base;
5693         my %co = parse_commit($hash_base)
5694                 or die_error(404, "Commit not found");
5695         my $ftype = "blob";
5696         if (!defined $hash) {
5697                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5698                         or die_error(404, "Error looking up file");
5699         } else {
5700                 $ftype = git_get_type($hash);
5701                 if ($ftype !~ "blob") {
5702                         die_error(400, "Object is not a blob");
5703                 }
5704         }
5705
5706         my $fd;
5707         if ($format eq 'incremental') {
5708                 # get file contents (as base)
5709                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5710                         or die_error(500, "Open git-cat-file failed");
5711         } elsif ($format eq 'data') {
5712                 # run git-blame --incremental
5713                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5714                         $hash_base, "--", $file_name
5715                         or die_error(500, "Open git-blame --incremental failed");
5716         } else {
5717                 # run git-blame --porcelain
5718                 open $fd, "-|", git_cmd(), "blame", '-p',
5719                         $hash_base, '--', $file_name
5720                         or die_error(500, "Open git-blame --porcelain failed");
5721         }
5722
5723         # incremental blame data returns early
5724         if ($format eq 'data') {
5725                 print $cgi->header(
5726                         -type=>"text/plain", -charset => "utf-8",
5727                         -status=> "200 OK");
5728                 local $| = 1; # output autoflush
5729                 print while <$fd>;
5730                 close $fd
5731                         or print "ERROR $!\n";
5732
5733                 print 'END';
5734                 if (defined $t0 && gitweb_check_feature('timed')) {
5735                         print ' '.
5736                               tv_interval($t0, [ gettimeofday() ]).
5737                               ' '.$number_of_git_cmds;
5738                 }
5739                 print "\n";
5740
5741                 return;
5742         }
5743
5744         # page header
5745         git_header_html();
5746         my $formats_nav =
5747                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5748                         "blob") .
5749                 " | ";
5750         if ($format eq 'incremental') {
5751                 $formats_nav .=
5752                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5753                                 "blame") . " (non-incremental)";
5754         } else {
5755                 $formats_nav .=
5756                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5757                                 "blame") . " (incremental)";
5758         }
5759         $formats_nav .=
5760                 " | " .
5761                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5762                         "history") .
5763                 " | " .
5764                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5765                         "HEAD");
5766         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5767         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5768         git_print_page_path($file_name, $ftype, $hash_base);
5769
5770         # page body
5771         if ($format eq 'incremental') {
5772                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5773                       "This page requires JavaScript to run.\n Use ".
5774                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5775                               'this page').
5776                       " instead.\n".
5777                       "</b></center></div>\n</noscript>\n";
5778
5779                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5780         }
5781
5782         print qq!<div class="page_body">\n!;
5783         print qq!<div id="progress_info">... / ...</div>\n!
5784                 if ($format eq 'incremental');
5785         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5786               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5787               qq!<thead>\n!.
5788               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5789               qq!</thead>\n!.
5790               qq!<tbody>\n!;
5791
5792         my @rev_color = qw(light dark);
5793         my $num_colors = scalar(@rev_color);
5794         my $current_color = 0;
5795
5796         if ($format eq 'incremental') {
5797                 my $color_class = $rev_color[$current_color];
5798
5799                 #contents of a file
5800                 my $linenr = 0;
5801         LINE:
5802                 while (my $line = <$fd>) {
5803                         chomp $line;
5804                         $linenr++;
5805
5806                         print qq!<tr id="l$linenr" class="$color_class">!.
5807                               qq!<td class="sha1"><a href=""> </a></td>!.
5808                               qq!<td class="linenr">!.
5809                               qq!<a class="linenr" href="">$linenr</a></td>!;
5810                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5811                         print qq!</tr>\n!;
5812                 }
5813
5814         } else { # porcelain, i.e. ordinary blame
5815                 my %metainfo = (); # saves information about commits
5816
5817                 # blame data
5818         LINE:
5819                 while (my $line = <$fd>) {
5820                         chomp $line;
5821                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5822                         # no <lines in group> for subsequent lines in group of lines
5823                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5824                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5825                         if (!exists $metainfo{$full_rev}) {
5826                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5827                         }
5828                         my $meta = $metainfo{$full_rev};
5829                         my $data;
5830                         while ($data = <$fd>) {
5831                                 chomp $data;
5832                                 last if ($data =~ s/^\t//); # contents of line
5833                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5834                                         $meta->{$1} = $2 unless exists $meta->{$1};
5835                                 }
5836                                 if ($data =~ /^previous /) {
5837                                         $meta->{'nprevious'}++;
5838                                 }
5839                         }
5840                         my $short_rev = substr($full_rev, 0, 8);
5841                         my $author = $meta->{'author'};
5842                         my %date =
5843                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5844                         my $date = $date{'iso-tz'};
5845                         if ($group_size) {
5846                                 $current_color = ($current_color + 1) % $num_colors;
5847                         }
5848                         my $tr_class = $rev_color[$current_color];
5849                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5850                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5851                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5852                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5853                         if ($group_size) {
5854                                 print "<td class=\"sha1\"";
5855                                 print " title=\"". esc_html($author) . ", $date\"";
5856                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5857                                 print ">";
5858                                 print $cgi->a({-href => href(action=>"commit",
5859                                                              hash=>$full_rev,
5860                                                              file_name=>$file_name)},
5861                                               esc_html($short_rev));
5862                                 if ($group_size >= 2) {
5863                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5864                                         if (@author_initials) {
5865                                                 print "<br />" .
5866                                                       esc_html(join('', @author_initials));
5867                                                 #           or join('.', ...)
5868                                         }
5869                                 }
5870                                 print "</td>\n";
5871                         }
5872                         # 'previous' <sha1 of parent commit> <filename at commit>
5873                         if (exists $meta->{'previous'} &&
5874                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5875                                 $meta->{'parent'} = $1;
5876                                 $meta->{'file_parent'} = unquote($2);
5877                         }
5878                         my $linenr_commit =
5879                                 exists($meta->{'parent'}) ?
5880                                 $meta->{'parent'} : $full_rev;
5881                         my $linenr_filename =
5882                                 exists($meta->{'file_parent'}) ?
5883                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5884                         my $blamed = href(action => 'blame',
5885                                           file_name => $linenr_filename,
5886                                           hash_base => $linenr_commit);
5887                         print "<td class=\"linenr\">";
5888                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5889                                         -class => "linenr" },
5890                                       esc_html($lineno));
5891                         print "</td>";
5892                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5893                         print "</tr>\n";
5894                 } # end while
5895
5896         }
5897
5898         # footer
5899         print "</tbody>\n".
5900               "</table>\n"; # class="blame"
5901         print "</div>\n";   # class="blame_body"
5902         close $fd
5903                 or print "Reading blob failed\n";
5904
5905         git_footer_html();
5906 }
5907
5908 sub git_blame {
5909         git_blame_common();
5910 }
5911
5912 sub git_blame_incremental {
5913         git_blame_common('incremental');
5914 }
5915
5916 sub git_blame_data {
5917         git_blame_common('data');
5918 }
5919
5920 sub git_tags {
5921         my $head = git_get_head_hash($project);
5922         git_header_html();
5923         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5924         git_print_header_div('summary', $project);
5925
5926         my @tagslist = git_get_tags_list();
5927         if (@tagslist) {
5928                 git_tags_body(\@tagslist);
5929         }
5930         git_footer_html();
5931 }
5932
5933 sub git_heads {
5934         my $head = git_get_head_hash($project);
5935         git_header_html();
5936         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5937         git_print_header_div('summary', $project);
5938
5939         my @headslist = git_get_heads_list();
5940         if (@headslist) {
5941                 git_heads_body(\@headslist, $head);
5942         }
5943         git_footer_html();
5944 }
5945
5946 # used both for single remote view and for list of all the remotes
5947 sub git_remotes {
5948         gitweb_check_feature('remote_heads')
5949                 or die_error(403, "Remote heads view is disabled");
5950
5951         my $head = git_get_head_hash($project);
5952         my $remote = $input_params{'hash'};
5953
5954         my $remotedata = git_get_remotes_list($remote);
5955         die_error(500, "Unable to get remote information") unless defined $remotedata;
5956
5957         unless (%$remotedata) {
5958                 die_error(404, defined $remote ?
5959                         "Remote $remote not found" :
5960                         "No remotes found");
5961         }
5962
5963         git_header_html(undef, undef, -action_extra => $remote);
5964         git_print_page_nav('', '',  $head, undef, $head,
5965                 format_ref_views($remote ? '' : 'remotes'));
5966
5967         fill_remote_heads($remotedata);
5968         if (defined $remote) {
5969                 git_print_header_div('remotes', "$remote remote for $project");
5970                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5971         } else {
5972                 git_print_header_div('summary', "$project remotes");
5973                 git_remotes_body($remotedata, undef, $head);
5974         }
5975
5976         git_footer_html();
5977 }
5978
5979 sub git_blob_plain {
5980         my $type = shift;
5981         my $expires;
5982
5983         if (!defined $hash) {
5984                 if (defined $file_name) {
5985                         my $base = $hash_base || git_get_head_hash($project);
5986                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5987                                 or die_error(404, "Cannot find file");
5988                 } else {
5989                         die_error(400, "No file name defined");
5990                 }
5991         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5992                 # blobs defined by non-textual hash id's can be cached
5993                 $expires = "+1d";
5994         }
5995
5996         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5997                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5998
5999         # content-type (can include charset)
6000         $type = blob_contenttype($fd, $file_name, $type);
6001
6002         # "save as" filename, even when no $file_name is given
6003         my $save_as = "$hash";
6004         if (defined $file_name) {
6005                 $save_as = $file_name;
6006         } elsif ($type =~ m/^text\//) {
6007                 $save_as .= '.txt';
6008         }
6009
6010         # With XSS prevention on, blobs of all types except a few known safe
6011         # ones are served with "Content-Disposition: attachment" to make sure
6012         # they don't run in our security domain.  For certain image types,
6013         # blob view writes an <img> tag referring to blob_plain view, and we
6014         # want to be sure not to break that by serving the image as an
6015         # attachment (though Firefox 3 doesn't seem to care).
6016         my $sandbox = $prevent_xss &&
6017                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6018
6019         print $cgi->header(
6020                 -type => $type,
6021                 -expires => $expires,
6022                 -content_disposition =>
6023                         ($sandbox ? 'attachment' : 'inline')
6024                         . '; filename="' . $save_as . '"');
6025         local $/ = undef;
6026         binmode STDOUT, ':raw';
6027         print <$fd>;
6028         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6029         close $fd;
6030 }
6031
6032 sub git_blob {
6033         my $expires;
6034
6035         if (!defined $hash) {
6036                 if (defined $file_name) {
6037                         my $base = $hash_base || git_get_head_hash($project);
6038                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6039                                 or die_error(404, "Cannot find file");
6040                 } else {
6041                         die_error(400, "No file name defined");
6042                 }
6043         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6044                 # blobs defined by non-textual hash id's can be cached
6045                 $expires = "+1d";
6046         }
6047
6048         my $have_blame = gitweb_check_feature('blame');
6049         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6050                 or die_error(500, "Couldn't cat $file_name, $hash");
6051         my $mimetype = blob_mimetype($fd, $file_name);
6052         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6053         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6054                 close $fd;
6055                 return git_blob_plain($mimetype);
6056         }
6057         # we can have blame only for text/* mimetype
6058         $have_blame &&= ($mimetype =~ m!^text/!);
6059
6060         my $highlight = gitweb_check_feature('highlight');
6061         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6062         $fd = run_highlighter($fd, $highlight, $syntax)
6063                 if $syntax;
6064
6065         git_header_html(undef, $expires);
6066         my $formats_nav = '';
6067         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6068                 if (defined $file_name) {
6069                         if ($have_blame) {
6070                                 $formats_nav .=
6071                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6072                                                 "blame") .
6073                                         " | ";
6074                         }
6075                         $formats_nav .=
6076                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6077                                         "history") .
6078                                 " | " .
6079                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6080                                         "raw") .
6081                                 " | " .
6082                                 $cgi->a({-href => href(action=>"blob",
6083                                                        hash_base=>"HEAD", file_name=>$file_name)},
6084                                         "HEAD");
6085                 } else {
6086                         $formats_nav .=
6087                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6088                                         "raw");
6089                 }
6090                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6091                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6092         } else {
6093                 print "<div class=\"page_nav\">\n" .
6094                       "<br/><br/></div>\n" .
6095                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6096         }
6097         git_print_page_path($file_name, "blob", $hash_base);
6098         print "<div class=\"page_body\">\n";
6099         if ($mimetype =~ m!^image/!) {
6100                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6101                 if ($file_name) {
6102                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6103                 }
6104                 print qq! src="! .
6105                       href(action=>"blob_plain", hash=>$hash,
6106                            hash_base=>$hash_base, file_name=>$file_name) .
6107                       qq!" />\n!;
6108         } else {
6109                 my $nr;
6110                 while (my $line = <$fd>) {
6111                         chomp $line;
6112                         $nr++;
6113                         $line = untabify($line);
6114                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6115                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6116                 }
6117         }
6118         close $fd
6119                 or print "Reading blob failed.\n";
6120         print "</div>";
6121         git_footer_html();
6122 }
6123
6124 sub git_tree {
6125         if (!defined $hash_base) {
6126                 $hash_base = "HEAD";
6127         }
6128         if (!defined $hash) {
6129                 if (defined $file_name) {
6130                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6131                 } else {
6132                         $hash = $hash_base;
6133                 }
6134         }
6135         die_error(404, "No such tree") unless defined($hash);
6136
6137         my $show_sizes = gitweb_check_feature('show-sizes');
6138         my $have_blame = gitweb_check_feature('blame');
6139
6140         my @entries = ();
6141         {
6142                 local $/ = "\0";
6143                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6144                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6145                         or die_error(500, "Open git-ls-tree failed");
6146                 @entries = map { chomp; $_ } <$fd>;
6147                 close $fd
6148                         or die_error(404, "Reading tree failed");
6149         }
6150
6151         my $refs = git_get_references();
6152         my $ref = format_ref_marker($refs, $hash_base);
6153         git_header_html();
6154         my $basedir = '';
6155         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6156                 my @views_nav = ();
6157                 if (defined $file_name) {
6158                         push @views_nav,
6159                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6160                                         "history"),
6161                                 $cgi->a({-href => href(action=>"tree",
6162                                                        hash_base=>"HEAD", file_name=>$file_name)},
6163                                         "HEAD"),
6164                 }
6165                 my $snapshot_links = format_snapshot_links($hash);
6166                 if (defined $snapshot_links) {
6167                         # FIXME: Should be available when we have no hash base as well.
6168                         push @views_nav, $snapshot_links;
6169                 }
6170                 git_print_page_nav('tree','', $hash_base, undef, undef,
6171                                    join(' | ', @views_nav));
6172                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6173         } else {
6174                 undef $hash_base;
6175                 print "<div class=\"page_nav\">\n";
6176                 print "<br/><br/></div>\n";
6177                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6178         }
6179         if (defined $file_name) {
6180                 $basedir = $file_name;
6181                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6182                         $basedir .= '/';
6183                 }
6184                 git_print_page_path($file_name, 'tree', $hash_base);
6185         }
6186         print "<div class=\"page_body\">\n";
6187         print "<table class=\"tree\">\n";
6188         my $alternate = 1;
6189         # '..' (top directory) link if possible
6190         if (defined $hash_base &&
6191             defined $file_name && $file_name =~ m![^/]+$!) {
6192                 if ($alternate) {
6193                         print "<tr class=\"dark\">\n";
6194                 } else {
6195                         print "<tr class=\"light\">\n";
6196                 }
6197                 $alternate ^= 1;
6198
6199                 my $up = $file_name;
6200                 $up =~ s!/?[^/]+$!!;
6201                 undef $up unless $up;
6202                 # based on git_print_tree_entry
6203                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6204                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6205                 print '<td class="list">';
6206                 print $cgi->a({-href => href(action=>"tree",
6207                                              hash_base=>$hash_base,
6208                                              file_name=>$up)},
6209                               "..");
6210                 print "</td>\n";
6211                 print "<td class=\"link\"></td>\n";
6212
6213                 print "</tr>\n";
6214         }
6215         foreach my $line (@entries) {
6216                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6217
6218                 if ($alternate) {
6219                         print "<tr class=\"dark\">\n";
6220                 } else {
6221                         print "<tr class=\"light\">\n";
6222                 }
6223                 $alternate ^= 1;
6224
6225                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6226
6227                 print "</tr>\n";
6228         }
6229         print "</table>\n" .
6230               "</div>";
6231         git_footer_html();
6232 }
6233
6234 sub snapshot_name {
6235         my ($project, $hash) = @_;
6236
6237         # path/to/project.git  -> project
6238         # path/to/project/.git -> project
6239         my $name = to_utf8($project);
6240         $name =~ s,([^/])/*\.git$,$1,;
6241         $name = basename($name);
6242         # sanitize name
6243         $name =~ s/[[:cntrl:]]/?/g;
6244
6245         my $ver = $hash;
6246         if ($hash =~ /^[0-9a-fA-F]+$/) {
6247                 # shorten SHA-1 hash
6248                 my $full_hash = git_get_full_hash($project, $hash);
6249                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6250                         $ver = git_get_short_hash($project, $hash);
6251                 }
6252         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6253                 # tags don't need shortened SHA-1 hash
6254                 $ver = $1;
6255         } else {
6256                 # branches and other need shortened SHA-1 hash
6257                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6258                         $ver = $1;
6259                 }
6260                 $ver .= '-' . git_get_short_hash($project, $hash);
6261         }
6262         # in case of hierarchical branch names
6263         $ver =~ s!/!.!g;
6264
6265         # name = project-version_string
6266         $name = "$name-$ver";
6267
6268         return wantarray ? ($name, $name) : $name;
6269 }
6270
6271 sub git_snapshot {
6272         my $format = $input_params{'snapshot_format'};
6273         if (!@snapshot_fmts) {
6274                 die_error(403, "Snapshots not allowed");
6275         }
6276         # default to first supported snapshot format
6277         $format ||= $snapshot_fmts[0];
6278         if ($format !~ m/^[a-z0-9]+$/) {
6279                 die_error(400, "Invalid snapshot format parameter");
6280         } elsif (!exists($known_snapshot_formats{$format})) {
6281                 die_error(400, "Unknown snapshot format");
6282         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6283                 die_error(403, "Snapshot format not allowed");
6284         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6285                 die_error(403, "Unsupported snapshot format");
6286         }
6287
6288         my $type = git_get_type("$hash^{}");
6289         if (!$type) {
6290                 die_error(404, 'Object does not exist');
6291         }  elsif ($type eq 'blob') {
6292                 die_error(400, 'Object is not a tree-ish');
6293         }
6294
6295         my ($name, $prefix) = snapshot_name($project, $hash);
6296         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6297         my $cmd = quote_command(
6298                 git_cmd(), 'archive',
6299                 "--format=$known_snapshot_formats{$format}{'format'}",
6300                 "--prefix=$prefix/", $hash);
6301         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6302                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6303         }
6304
6305         $filename =~ s/(["\\])/\\$1/g;
6306         print $cgi->header(
6307                 -type => $known_snapshot_formats{$format}{'type'},
6308                 -content_disposition => 'inline; filename="' . $filename . '"',
6309                 -status => '200 OK');
6310
6311         open my $fd, "-|", $cmd
6312                 or die_error(500, "Execute git-archive failed");
6313         binmode STDOUT, ':raw';
6314         print <$fd>;
6315         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6316         close $fd;
6317 }
6318
6319 sub git_log_generic {
6320         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6321
6322         my $head = git_get_head_hash($project);
6323         if (!defined $base) {
6324                 $base = $head;
6325         }
6326         if (!defined $page) {
6327                 $page = 0;
6328         }
6329         my $refs = git_get_references();
6330
6331         my $commit_hash = $base;
6332         if (defined $parent) {
6333                 $commit_hash = "$parent..$base";
6334         }
6335         my @commitlist =
6336                 parse_commits($commit_hash, 101, (100 * $page),
6337                               defined $file_name ? ($file_name, "--full-history") : ());
6338
6339         my $ftype;
6340         if (!defined $file_hash && defined $file_name) {
6341                 # some commits could have deleted file in question,
6342                 # and not have it in tree, but one of them has to have it
6343                 for (my $i = 0; $i < @commitlist; $i++) {
6344                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6345                         last if defined $file_hash;
6346                 }
6347         }
6348         if (defined $file_hash) {
6349                 $ftype = git_get_type($file_hash);
6350         }
6351         if (defined $file_name && !defined $ftype) {
6352                 die_error(500, "Unknown type of object");
6353         }
6354         my %co;
6355         if (defined $file_name) {
6356                 %co = parse_commit($base)
6357                         or die_error(404, "Unknown commit object");
6358         }
6359
6360
6361         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6362         my $next_link = '';
6363         if ($#commitlist >= 100) {
6364                 $next_link =
6365                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6366                                  -accesskey => "n", -title => "Alt-n"}, "next");
6367         }
6368         my $patch_max = gitweb_get_feature('patches');
6369         if ($patch_max && !defined $file_name) {
6370                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6371                         $paging_nav .= " &sdot; " .
6372                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6373                                         "patches");
6374                 }
6375         }
6376
6377         git_header_html();
6378         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6379         if (defined $file_name) {
6380                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6381         } else {
6382                 git_print_header_div('summary', $project)
6383         }
6384         git_print_page_path($file_name, $ftype, $hash_base)
6385                 if (defined $file_name);
6386
6387         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6388                      $file_name, $file_hash, $ftype);
6389
6390         git_footer_html();
6391 }
6392
6393 sub git_log {
6394         git_log_generic('log', \&git_log_body,
6395                         $hash, $hash_parent);
6396 }
6397
6398 sub git_commit {
6399         $hash ||= $hash_base || "HEAD";
6400         my %co = parse_commit($hash)
6401             or die_error(404, "Unknown commit object");
6402
6403         my $parent  = $co{'parent'};
6404         my $parents = $co{'parents'}; # listref
6405
6406         # we need to prepare $formats_nav before any parameter munging
6407         my $formats_nav;
6408         if (!defined $parent) {
6409                 # --root commitdiff
6410                 $formats_nav .= '(initial)';
6411         } elsif (@$parents == 1) {
6412                 # single parent commit
6413                 $formats_nav .=
6414                         '(parent: ' .
6415                         $cgi->a({-href => href(action=>"commit",
6416                                                hash=>$parent)},
6417                                 esc_html(substr($parent, 0, 7))) .
6418                         ')';
6419         } else {
6420                 # merge commit
6421                 $formats_nav .=
6422                         '(merge: ' .
6423                         join(' ', map {
6424                                 $cgi->a({-href => href(action=>"commit",
6425                                                        hash=>$_)},
6426                                         esc_html(substr($_, 0, 7)));
6427                         } @$parents ) .
6428                         ')';
6429         }
6430         if (gitweb_check_feature('patches') && @$parents <= 1) {
6431                 $formats_nav .= " | " .
6432                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6433                                 "patch");
6434         }
6435
6436         if (!defined $parent) {
6437                 $parent = "--root";
6438         }
6439         my @difftree;
6440         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6441                 @diff_opts,
6442                 (@$parents <= 1 ? $parent : '-c'),
6443                 $hash, "--"
6444                 or die_error(500, "Open git-diff-tree failed");
6445         @difftree = map { chomp; $_ } <$fd>;
6446         close $fd or die_error(404, "Reading git-diff-tree failed");
6447
6448         # non-textual hash id's can be cached
6449         my $expires;
6450         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6451                 $expires = "+1d";
6452         }
6453         my $refs = git_get_references();
6454         my $ref = format_ref_marker($refs, $co{'id'});
6455
6456         git_header_html(undef, $expires);
6457         git_print_page_nav('commit', '',
6458                            $hash, $co{'tree'}, $hash,
6459                            $formats_nav);
6460
6461         if (defined $co{'parent'}) {
6462                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6463         } else {
6464                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6465         }
6466         print "<div class=\"title_text\">\n" .
6467               "<table class=\"object_header\">\n";
6468         git_print_authorship_rows(\%co);
6469         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6470         print "<tr>" .
6471               "<td>tree</td>" .
6472               "<td class=\"sha1\">" .
6473               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6474                        class => "list"}, $co{'tree'}) .
6475               "</td>" .
6476               "<td class=\"link\">" .
6477               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6478                       "tree");
6479         my $snapshot_links = format_snapshot_links($hash);
6480         if (defined $snapshot_links) {
6481                 print " | " . $snapshot_links;
6482         }
6483         print "</td>" .
6484               "</tr>\n";
6485
6486         foreach my $par (@$parents) {
6487                 print "<tr>" .
6488                       "<td>parent</td>" .
6489                       "<td class=\"sha1\">" .
6490                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6491                                class => "list"}, $par) .
6492                       "</td>" .
6493                       "<td class=\"link\">" .
6494                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6495                       " | " .
6496                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6497                       "</td>" .
6498                       "</tr>\n";
6499         }
6500         print "</table>".
6501               "</div>\n";
6502
6503         print "<div class=\"page_body\">\n";
6504         git_print_log($co{'comment'});
6505         print "</div>\n";
6506
6507         git_difftree_body(\@difftree, $hash, @$parents);
6508
6509         git_footer_html();
6510 }
6511
6512 sub git_object {
6513         # object is defined by:
6514         # - hash or hash_base alone
6515         # - hash_base and file_name
6516         my $type;
6517
6518         # - hash or hash_base alone
6519         if ($hash || ($hash_base && !defined $file_name)) {
6520                 my $object_id = $hash || $hash_base;
6521
6522                 open my $fd, "-|", quote_command(
6523                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6524                         or die_error(404, "Object does not exist");
6525                 $type = <$fd>;
6526                 chomp $type;
6527                 close $fd
6528                         or die_error(404, "Object does not exist");
6529
6530         # - hash_base and file_name
6531         } elsif ($hash_base && defined $file_name) {
6532                 $file_name =~ s,/+$,,;
6533
6534                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6535                         or die_error(404, "Base object does not exist");
6536
6537                 # here errors should not hapen
6538                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6539                         or die_error(500, "Open git-ls-tree failed");
6540                 my $line = <$fd>;
6541                 close $fd;
6542
6543                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6544                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6545                         die_error(404, "File or directory for given base does not exist");
6546                 }
6547                 $type = $2;
6548                 $hash = $3;
6549         } else {
6550                 die_error(400, "Not enough information to find object");
6551         }
6552
6553         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6554                                           hash=>$hash, hash_base=>$hash_base,
6555                                           file_name=>$file_name),
6556                              -status => '302 Found');
6557 }
6558
6559 sub git_blobdiff {
6560         my $format = shift || 'html';
6561
6562         my $fd;
6563         my @difftree;
6564         my %diffinfo;
6565         my $expires;
6566
6567         # preparing $fd and %diffinfo for git_patchset_body
6568         # new style URI
6569         if (defined $hash_base && defined $hash_parent_base) {
6570                 if (defined $file_name) {
6571                         # read raw output
6572                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6573                                 $hash_parent_base, $hash_base,
6574                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6575                                 or die_error(500, "Open git-diff-tree failed");
6576                         @difftree = map { chomp; $_ } <$fd>;
6577                         close $fd
6578                                 or die_error(404, "Reading git-diff-tree failed");
6579                         @difftree
6580                                 or die_error(404, "Blob diff not found");
6581
6582                 } elsif (defined $hash &&
6583                          $hash =~ /[0-9a-fA-F]{40}/) {
6584                         # try to find filename from $hash
6585
6586                         # read filtered raw output
6587                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6588                                 $hash_parent_base, $hash_base, "--"
6589                                 or die_error(500, "Open git-diff-tree failed");
6590                         @difftree =
6591                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6592                                 # $hash == to_id
6593                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6594                                 map { chomp; $_ } <$fd>;
6595                         close $fd
6596                                 or die_error(404, "Reading git-diff-tree failed");
6597                         @difftree
6598                                 or die_error(404, "Blob diff not found");
6599
6600                 } else {
6601                         die_error(400, "Missing one of the blob diff parameters");
6602                 }
6603
6604                 if (@difftree > 1) {
6605                         die_error(400, "Ambiguous blob diff specification");
6606                 }
6607
6608                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6609                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6610                 $file_name   ||= $diffinfo{'to_file'};
6611
6612                 $hash_parent ||= $diffinfo{'from_id'};
6613                 $hash        ||= $diffinfo{'to_id'};
6614
6615                 # non-textual hash id's can be cached
6616                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6617                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6618                         $expires = '+1d';
6619                 }
6620
6621                 # open patch output
6622                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6623                         '-p', ($format eq 'html' ? "--full-index" : ()),
6624                         $hash_parent_base, $hash_base,
6625                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6626                         or die_error(500, "Open git-diff-tree failed");
6627         }
6628
6629         # old/legacy style URI -- not generated anymore since 1.4.3.
6630         if (!%diffinfo) {
6631                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6632         }
6633
6634         # header
6635         if ($format eq 'html') {
6636                 my $formats_nav =
6637                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6638                                 "raw");
6639                 git_header_html(undef, $expires);
6640                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6641                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6642                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6643                 } else {
6644                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6645                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6646                 }
6647                 if (defined $file_name) {
6648                         git_print_page_path($file_name, "blob", $hash_base);
6649                 } else {
6650                         print "<div class=\"page_path\"></div>\n";
6651                 }
6652
6653         } elsif ($format eq 'plain') {
6654                 print $cgi->header(
6655                         -type => 'text/plain',
6656                         -charset => 'utf-8',
6657                         -expires => $expires,
6658                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6659
6660                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6661
6662         } else {
6663                 die_error(400, "Unknown blobdiff format");
6664         }
6665
6666         # patch
6667         if ($format eq 'html') {
6668                 print "<div class=\"page_body\">\n";
6669
6670                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6671                 close $fd;
6672
6673                 print "</div>\n"; # class="page_body"
6674                 git_footer_html();
6675
6676         } else {
6677                 while (my $line = <$fd>) {
6678                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6679                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6680
6681                         print $line;
6682
6683                         last if $line =~ m!^\+\+\+!;
6684                 }
6685                 local $/ = undef;
6686                 print <$fd>;
6687                 close $fd;
6688         }
6689 }
6690
6691 sub git_blobdiff_plain {
6692         git_blobdiff('plain');
6693 }
6694
6695 sub git_commitdiff {
6696         my %params = @_;
6697         my $format = $params{-format} || 'html';
6698
6699         my ($patch_max) = gitweb_get_feature('patches');
6700         if ($format eq 'patch') {
6701                 die_error(403, "Patch view not allowed") unless $patch_max;
6702         }
6703
6704         $hash ||= $hash_base || "HEAD";
6705         my %co = parse_commit($hash)
6706             or die_error(404, "Unknown commit object");
6707
6708         # choose format for commitdiff for merge
6709         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6710                 $hash_parent = '--cc';
6711         }
6712         # we need to prepare $formats_nav before almost any parameter munging
6713         my $formats_nav;
6714         if ($format eq 'html') {
6715                 $formats_nav =
6716                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6717                                 "raw");
6718                 if ($patch_max && @{$co{'parents'}} <= 1) {
6719                         $formats_nav .= " | " .
6720                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6721                                         "patch");
6722                 }
6723
6724                 if (defined $hash_parent &&
6725                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6726                         # commitdiff with two commits given
6727                         my $hash_parent_short = $hash_parent;
6728                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6729                                 $hash_parent_short = substr($hash_parent, 0, 7);
6730                         }
6731                         $formats_nav .=
6732                                 ' (from';
6733                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6734                                 if ($co{'parents'}[$i] eq $hash_parent) {
6735                                         $formats_nav .= ' parent ' . ($i+1);
6736                                         last;
6737                                 }
6738                         }
6739                         $formats_nav .= ': ' .
6740                                 $cgi->a({-href => href(action=>"commitdiff",
6741                                                        hash=>$hash_parent)},
6742                                         esc_html($hash_parent_short)) .
6743                                 ')';
6744                 } elsif (!$co{'parent'}) {
6745                         # --root commitdiff
6746                         $formats_nav .= ' (initial)';
6747                 } elsif (scalar @{$co{'parents'}} == 1) {
6748                         # single parent commit
6749                         $formats_nav .=
6750                                 ' (parent: ' .
6751                                 $cgi->a({-href => href(action=>"commitdiff",
6752                                                        hash=>$co{'parent'})},
6753                                         esc_html(substr($co{'parent'}, 0, 7))) .
6754                                 ')';
6755                 } else {
6756                         # merge commit
6757                         if ($hash_parent eq '--cc') {
6758                                 $formats_nav .= ' | ' .
6759                                         $cgi->a({-href => href(action=>"commitdiff",
6760                                                                hash=>$hash, hash_parent=>'-c')},
6761                                                 'combined');
6762                         } else { # $hash_parent eq '-c'
6763                                 $formats_nav .= ' | ' .
6764                                         $cgi->a({-href => href(action=>"commitdiff",
6765                                                                hash=>$hash, hash_parent=>'--cc')},
6766                                                 'compact');
6767                         }
6768                         $formats_nav .=
6769                                 ' (merge: ' .
6770                                 join(' ', map {
6771                                         $cgi->a({-href => href(action=>"commitdiff",
6772                                                                hash=>$_)},
6773                                                 esc_html(substr($_, 0, 7)));
6774                                 } @{$co{'parents'}} ) .
6775                                 ')';
6776                 }
6777         }
6778
6779         my $hash_parent_param = $hash_parent;
6780         if (!defined $hash_parent_param) {
6781                 # --cc for multiple parents, --root for parentless
6782                 $hash_parent_param =
6783                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6784         }
6785
6786         # read commitdiff
6787         my $fd;
6788         my @difftree;
6789         if ($format eq 'html') {
6790                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6791                         "--no-commit-id", "--patch-with-raw", "--full-index",
6792                         $hash_parent_param, $hash, "--"
6793                         or die_error(500, "Open git-diff-tree failed");
6794
6795                 while (my $line = <$fd>) {
6796                         chomp $line;
6797                         # empty line ends raw part of diff-tree output
6798                         last unless $line;
6799                         push @difftree, scalar parse_difftree_raw_line($line);
6800                 }
6801
6802         } elsif ($format eq 'plain') {
6803                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6804                         '-p', $hash_parent_param, $hash, "--"
6805                         or die_error(500, "Open git-diff-tree failed");
6806         } elsif ($format eq 'patch') {
6807                 # For commit ranges, we limit the output to the number of
6808                 # patches specified in the 'patches' feature.
6809                 # For single commits, we limit the output to a single patch,
6810                 # diverging from the git-format-patch default.
6811                 my @commit_spec = ();
6812                 if ($hash_parent) {
6813                         if ($patch_max > 0) {
6814                                 push @commit_spec, "-$patch_max";
6815                         }
6816                         push @commit_spec, '-n', "$hash_parent..$hash";
6817                 } else {
6818                         if ($params{-single}) {
6819                                 push @commit_spec, '-1';
6820                         } else {
6821                                 if ($patch_max > 0) {
6822                                         push @commit_spec, "-$patch_max";
6823                                 }
6824                                 push @commit_spec, "-n";
6825                         }
6826                         push @commit_spec, '--root', $hash;
6827                 }
6828                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6829                         '--encoding=utf8', '--stdout', @commit_spec
6830                         or die_error(500, "Open git-format-patch failed");
6831         } else {
6832                 die_error(400, "Unknown commitdiff format");
6833         }
6834
6835         # non-textual hash id's can be cached
6836         my $expires;
6837         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6838                 $expires = "+1d";
6839         }
6840
6841         # write commit message
6842         if ($format eq 'html') {
6843                 my $refs = git_get_references();
6844                 my $ref = format_ref_marker($refs, $co{'id'});
6845
6846                 git_header_html(undef, $expires);
6847                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6848                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6849                 print "<div class=\"title_text\">\n" .
6850                       "<table class=\"object_header\">\n";
6851                 git_print_authorship_rows(\%co);
6852                 print "</table>".
6853                       "</div>\n";
6854                 print "<div class=\"page_body\">\n";
6855                 if (@{$co{'comment'}} > 1) {
6856                         print "<div class=\"log\">\n";
6857                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6858                         print "</div>\n"; # class="log"
6859                 }
6860
6861         } elsif ($format eq 'plain') {
6862                 my $refs = git_get_references("tags");
6863                 my $tagname = git_get_rev_name_tags($hash);
6864                 my $filename = basename($project) . "-$hash.patch";
6865
6866                 print $cgi->header(
6867                         -type => 'text/plain',
6868                         -charset => 'utf-8',
6869                         -expires => $expires,
6870                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6871                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6872                 print "From: " . to_utf8($co{'author'}) . "\n";
6873                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6874                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6875
6876                 print "X-Git-Tag: $tagname\n" if $tagname;
6877                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6878
6879                 foreach my $line (@{$co{'comment'}}) {
6880                         print to_utf8($line) . "\n";
6881                 }
6882                 print "---\n\n";
6883         } elsif ($format eq 'patch') {
6884                 my $filename = basename($project) . "-$hash.patch";
6885
6886                 print $cgi->header(
6887                         -type => 'text/plain',
6888                         -charset => 'utf-8',
6889                         -expires => $expires,
6890                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6891         }
6892
6893         # write patch
6894         if ($format eq 'html') {
6895                 my $use_parents = !defined $hash_parent ||
6896                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6897                 git_difftree_body(\@difftree, $hash,
6898                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6899                 print "<br/>\n";
6900
6901                 git_patchset_body($fd, \@difftree, $hash,
6902                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6903                 close $fd;
6904                 print "</div>\n"; # class="page_body"
6905                 git_footer_html();
6906
6907         } elsif ($format eq 'plain') {
6908                 local $/ = undef;
6909                 print <$fd>;
6910                 close $fd
6911                         or print "Reading git-diff-tree failed\n";
6912         } elsif ($format eq 'patch') {
6913                 local $/ = undef;
6914                 print <$fd>;
6915                 close $fd
6916                         or print "Reading git-format-patch failed\n";
6917         }
6918 }
6919
6920 sub git_commitdiff_plain {
6921         git_commitdiff(-format => 'plain');
6922 }
6923
6924 # format-patch-style patches
6925 sub git_patch {
6926         git_commitdiff(-format => 'patch', -single => 1);
6927 }
6928
6929 sub git_patches {
6930         git_commitdiff(-format => 'patch');
6931 }
6932
6933 sub git_history {
6934         git_log_generic('history', \&git_history_body,
6935                         $hash_base, $hash_parent_base,
6936                         $file_name, $hash);
6937 }
6938
6939 sub git_search {
6940         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6941         if (!defined $searchtext) {
6942                 die_error(400, "Text field is empty");
6943         }
6944         if (!defined $hash) {
6945                 $hash = git_get_head_hash($project);
6946         }
6947         my %co = parse_commit($hash);
6948         if (!%co) {
6949                 die_error(404, "Unknown commit object");
6950         }
6951         if (!defined $page) {
6952                 $page = 0;
6953         }
6954
6955         $searchtype ||= 'commit';
6956         if ($searchtype eq 'pickaxe') {
6957                 # pickaxe may take all resources of your box and run for several minutes
6958                 # with every query - so decide by yourself how public you make this feature
6959                 gitweb_check_feature('pickaxe')
6960                     or die_error(403, "Pickaxe is disabled");
6961         }
6962         if ($searchtype eq 'grep') {
6963                 gitweb_check_feature('grep')
6964                     or die_error(403, "Grep is disabled");
6965         }
6966
6967         git_header_html();
6968
6969         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6970                 my $greptype;
6971                 if ($searchtype eq 'commit') {
6972                         $greptype = "--grep=";
6973                 } elsif ($searchtype eq 'author') {
6974                         $greptype = "--author=";
6975                 } elsif ($searchtype eq 'committer') {
6976                         $greptype = "--committer=";
6977                 }
6978                 $greptype .= $searchtext;
6979                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6980                                                $greptype, '--regexp-ignore-case',
6981                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6982
6983                 my $paging_nav = '';
6984                 if ($page > 0) {
6985                         $paging_nav .=
6986                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6987                                                        searchtext=>$searchtext,
6988                                                        searchtype=>$searchtype)},
6989                                         "first");
6990                         $paging_nav .= " &sdot; " .
6991                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6992                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6993                 } else {
6994                         $paging_nav .= "first";
6995                         $paging_nav .= " &sdot; prev";
6996                 }
6997                 my $next_link = '';
6998                 if ($#commitlist >= 100) {
6999                         $next_link =
7000                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7001                                          -accesskey => "n", -title => "Alt-n"}, "next");
7002                         $paging_nav .= " &sdot; $next_link";
7003                 } else {
7004                         $paging_nav .= " &sdot; next";
7005                 }
7006
7007                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7008                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7009                 if ($page == 0 && !@commitlist) {
7010                         print "<p>No match.</p>\n";
7011                 } else {
7012                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7013                 }
7014         }
7015
7016         if ($searchtype eq 'pickaxe') {
7017                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7018                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7019
7020                 print "<table class=\"pickaxe search\">\n";
7021                 my $alternate = 1;
7022                 local $/ = "\n";
7023                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7024                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7025                         ($search_use_regexp ? '--pickaxe-regex' : ());
7026                 undef %co;
7027                 my @files;
7028                 while (my $line = <$fd>) {
7029                         chomp $line;
7030                         next unless $line;
7031
7032                         my %set = parse_difftree_raw_line($line);
7033                         if (defined $set{'commit'}) {
7034                                 # finish previous commit
7035                                 if (%co) {
7036                                         print "</td>\n" .
7037                                               "<td class=\"link\">" .
7038                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7039                                               " | " .
7040                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7041                                         print "</td>\n" .
7042                                               "</tr>\n";
7043                                 }
7044
7045                                 if ($alternate) {
7046                                         print "<tr class=\"dark\">\n";
7047                                 } else {
7048                                         print "<tr class=\"light\">\n";
7049                                 }
7050                                 $alternate ^= 1;
7051                                 %co = parse_commit($set{'commit'});
7052                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7053                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7054                                       "<td><i>$author</i></td>\n" .
7055                                       "<td>" .
7056                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7057                                               -class => "list subject"},
7058                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7059                         } elsif (defined $set{'to_id'}) {
7060                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7061
7062                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7063                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7064                                               -class => "list"},
7065                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7066                                       "<br/>\n";
7067                         }
7068                 }
7069                 close $fd;
7070
7071                 # finish last commit (warning: repetition!)
7072                 if (%co) {
7073                         print "</td>\n" .
7074                               "<td class=\"link\">" .
7075                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7076                               " | " .
7077                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7078                         print "</td>\n" .
7079                               "</tr>\n";
7080                 }
7081
7082                 print "</table>\n";
7083         }
7084
7085         if ($searchtype eq 'grep') {
7086                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7087                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7088
7089                 print "<table class=\"grep_search\">\n";
7090                 my $alternate = 1;
7091                 my $matches = 0;
7092                 local $/ = "\n";
7093                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7094                         $search_use_regexp ? ('-E', '-i') : '-F',
7095                         $searchtext, $co{'tree'};
7096                 my $lastfile = '';
7097                 while (my $line = <$fd>) {
7098                         chomp $line;
7099                         my ($file, $lno, $ltext, $binary);
7100                         last if ($matches++ > 1000);
7101                         if ($line =~ /^Binary file (.+) matches$/) {
7102                                 $file = $1;
7103                                 $binary = 1;
7104                         } else {
7105                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7106                         }
7107                         if ($file ne $lastfile) {
7108                                 $lastfile and print "</td></tr>\n";
7109                                 if ($alternate++) {
7110                                         print "<tr class=\"dark\">\n";
7111                                 } else {
7112                                         print "<tr class=\"light\">\n";
7113                                 }
7114                                 print "<td class=\"list\">".
7115                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7116                                                                file_name=>"$file"),
7117                                                 -class => "list"}, esc_path($file));
7118                                 print "</td><td>\n";
7119                                 $lastfile = $file;
7120                         }
7121                         if ($binary) {
7122                                 print "<div class=\"binary\">Binary file</div>\n";
7123                         } else {
7124                                 $ltext = untabify($ltext);
7125                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7126                                         $ltext = esc_html($1, -nbsp=>1);
7127                                         $ltext .= '<span class="match">';
7128                                         $ltext .= esc_html($2, -nbsp=>1);
7129                                         $ltext .= '</span>';
7130                                         $ltext .= esc_html($3, -nbsp=>1);
7131                                 } else {
7132                                         $ltext = esc_html($ltext, -nbsp=>1);
7133                                 }
7134                                 print "<div class=\"pre\">" .
7135                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7136                                                                file_name=>"$file").'#l'.$lno,
7137                                                 -class => "linenr"}, sprintf('%4i', $lno))
7138                                         . ' ' .  $ltext . "</div>\n";
7139                         }
7140                 }
7141                 if ($lastfile) {
7142                         print "</td></tr>\n";
7143                         if ($matches > 1000) {
7144                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7145                         }
7146                 } else {
7147                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7148                 }
7149                 close $fd;
7150
7151                 print "</table>\n";
7152         }
7153         git_footer_html();
7154 }
7155
7156 sub git_search_help {
7157         git_header_html();
7158         git_print_page_nav('','', $hash,$hash,$hash);
7159         print <<EOT;
7160 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7161 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7162 the pattern entered is recognized as the POSIX extended
7163 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7164 insensitive).</p>
7165 <dl>
7166 <dt><b>commit</b></dt>
7167 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7168 EOT
7169         my $have_grep = gitweb_check_feature('grep');
7170         if ($have_grep) {
7171                 print <<EOT;
7172 <dt><b>grep</b></dt>
7173 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7174     a different one) are searched for the given pattern. On large trees, this search can take
7175 a while and put some strain on the server, so please use it with some consideration. Note that
7176 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7177 case-sensitive.</dd>
7178 EOT
7179         }
7180         print <<EOT;
7181 <dt><b>author</b></dt>
7182 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7183 <dt><b>committer</b></dt>
7184 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7185 EOT
7186         my $have_pickaxe = gitweb_check_feature('pickaxe');
7187         if ($have_pickaxe) {
7188                 print <<EOT;
7189 <dt><b>pickaxe</b></dt>
7190 <dd>All commits that caused the string to appear or disappear from any file (changes that
7191 added, removed or "modified" the string) will be listed. This search can take a while and
7192 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7193 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7194 EOT
7195         }
7196         print "</dl>\n";
7197         git_footer_html();
7198 }
7199
7200 sub git_shortlog {
7201         git_log_generic('shortlog', \&git_shortlog_body,
7202                         $hash, $hash_parent);
7203 }
7204
7205 ## ......................................................................
7206 ## feeds (RSS, Atom; OPML)
7207
7208 sub git_feed {
7209         my $format = shift || 'atom';
7210         my $have_blame = gitweb_check_feature('blame');
7211
7212         # Atom: http://www.atomenabled.org/developers/syndication/
7213         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7214         if ($format ne 'rss' && $format ne 'atom') {
7215                 die_error(400, "Unknown web feed format");
7216         }
7217
7218         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7219         my $head = $hash || 'HEAD';
7220         my @commitlist = parse_commits($head, 150, 0, $file_name);
7221
7222         my %latest_commit;
7223         my %latest_date;
7224         my $content_type = "application/$format+xml";
7225         if (defined $cgi->http('HTTP_ACCEPT') &&
7226                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7227                 # browser (feed reader) prefers text/xml
7228                 $content_type = 'text/xml';
7229         }
7230         if (defined($commitlist[0])) {
7231                 %latest_commit = %{$commitlist[0]};
7232                 my $latest_epoch = $latest_commit{'committer_epoch'};
7233                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7234                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7235                 if (defined $if_modified) {
7236                         my $since;
7237                         if (eval { require HTTP::Date; 1; }) {
7238                                 $since = HTTP::Date::str2time($if_modified);
7239                         } elsif (eval { require Time::ParseDate; 1; }) {
7240                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7241                         }
7242                         if (defined $since && $latest_epoch <= $since) {
7243                                 print $cgi->header(
7244                                         -type => $content_type,
7245                                         -charset => 'utf-8',
7246                                         -last_modified => $latest_date{'rfc2822'},
7247                                         -status => '304 Not Modified');
7248                                 return;
7249                         }
7250                 }
7251                 print $cgi->header(
7252                         -type => $content_type,
7253                         -charset => 'utf-8',
7254                         -last_modified => $latest_date{'rfc2822'});
7255         } else {
7256                 print $cgi->header(
7257                         -type => $content_type,
7258                         -charset => 'utf-8');
7259         }
7260
7261         # Optimization: skip generating the body if client asks only
7262         # for Last-Modified date.
7263         return if ($cgi->request_method() eq 'HEAD');
7264
7265         # header variables
7266         my $title = "$site_name - $project/$action";
7267         my $feed_type = 'log';
7268         if (defined $hash) {
7269                 $title .= " - '$hash'";
7270                 $feed_type = 'branch log';
7271                 if (defined $file_name) {
7272                         $title .= " :: $file_name";
7273                         $feed_type = 'history';
7274                 }
7275         } elsif (defined $file_name) {
7276                 $title .= " - $file_name";
7277                 $feed_type = 'history';
7278         }
7279         $title .= " $feed_type";
7280         my $descr = git_get_project_description($project);
7281         if (defined $descr) {
7282                 $descr = esc_html($descr);
7283         } else {
7284                 $descr = "$project " .
7285                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7286                          " feed";
7287         }
7288         my $owner = git_get_project_owner($project);
7289         $owner = esc_html($owner);
7290
7291         #header
7292         my $alt_url;
7293         if (defined $file_name) {
7294                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7295         } elsif (defined $hash) {
7296                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7297         } else {
7298                 $alt_url = href(-full=>1, action=>"summary");
7299         }
7300         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7301         if ($format eq 'rss') {
7302                 print <<XML;
7303 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7304 <channel>
7305 XML
7306                 print "<title>$title</title>\n" .
7307                       "<link>$alt_url</link>\n" .
7308                       "<description>$descr</description>\n" .
7309                       "<language>en</language>\n" .
7310                       # project owner is responsible for 'editorial' content
7311                       "<managingEditor>$owner</managingEditor>\n";
7312                 if (defined $logo || defined $favicon) {
7313                         # prefer the logo to the favicon, since RSS
7314                         # doesn't allow both
7315                         my $img = esc_url($logo || $favicon);
7316                         print "<image>\n" .
7317                               "<url>$img</url>\n" .
7318                               "<title>$title</title>\n" .
7319                               "<link>$alt_url</link>\n" .
7320                               "</image>\n";
7321                 }
7322                 if (%latest_date) {
7323                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7324                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7325                 }
7326                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7327         } elsif ($format eq 'atom') {
7328                 print <<XML;
7329 <feed xmlns="http://www.w3.org/2005/Atom">
7330 XML
7331                 print "<title>$title</title>\n" .
7332                       "<subtitle>$descr</subtitle>\n" .
7333                       '<link rel="alternate" type="text/html" href="' .
7334                       $alt_url . '" />' . "\n" .
7335                       '<link rel="self" type="' . $content_type . '" href="' .
7336                       $cgi->self_url() . '" />' . "\n" .
7337                       "<id>" . href(-full=>1) . "</id>\n" .
7338                       # use project owner for feed author
7339                       "<author><name>$owner</name></author>\n";
7340                 if (defined $favicon) {
7341                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7342                 }
7343                 if (defined $logo) {
7344                         # not twice as wide as tall: 72 x 27 pixels
7345                         print "<logo>" . esc_url($logo) . "</logo>\n";
7346                 }
7347                 if (! %latest_date) {
7348                         # dummy date to keep the feed valid until commits trickle in:
7349                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7350                 } else {
7351                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7352                 }
7353                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7354         }
7355
7356         # contents
7357         for (my $i = 0; $i <= $#commitlist; $i++) {
7358                 my %co = %{$commitlist[$i]};
7359                 my $commit = $co{'id'};
7360                 # we read 150, we always show 30 and the ones more recent than 48 hours
7361                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7362                         last;
7363                 }
7364                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7365
7366                 # get list of changed files
7367                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7368                         $co{'parent'} || "--root",
7369                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7370                         or next;
7371                 my @difftree = map { chomp; $_ } <$fd>;
7372                 close $fd
7373                         or next;
7374
7375                 # print element (entry, item)
7376                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7377                 if ($format eq 'rss') {
7378                         print "<item>\n" .
7379                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7380                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7381                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7382                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7383                               "<link>$co_url</link>\n" .
7384                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7385                               "<content:encoded>" .
7386                               "<![CDATA[\n";
7387                 } elsif ($format eq 'atom') {
7388                         print "<entry>\n" .
7389                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7390                               "<updated>$cd{'iso-8601'}</updated>\n" .
7391                               "<author>\n" .
7392                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7393                         if ($co{'author_email'}) {
7394                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7395                         }
7396                         print "</author>\n" .
7397                               # use committer for contributor
7398                               "<contributor>\n" .
7399                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7400                         if ($co{'committer_email'}) {
7401                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7402                         }
7403                         print "</contributor>\n" .
7404                               "<published>$cd{'iso-8601'}</published>\n" .
7405                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7406                               "<id>$co_url</id>\n" .
7407                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7408                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7409                 }
7410                 my $comment = $co{'comment'};
7411                 print "<pre>\n";
7412                 foreach my $line (@$comment) {
7413                         $line = esc_html($line);
7414                         print "$line\n";
7415                 }
7416                 print "</pre><ul>\n";
7417                 foreach my $difftree_line (@difftree) {
7418                         my %difftree = parse_difftree_raw_line($difftree_line);
7419                         next if !$difftree{'from_id'};
7420
7421                         my $file = $difftree{'file'} || $difftree{'to_file'};
7422
7423                         print "<li>" .
7424                               "[" .
7425                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7426                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7427                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7428                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7429                                       -title => "diff"}, 'D');
7430                         if ($have_blame) {
7431                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7432                                                              file_name=>$file, hash_base=>$commit),
7433                                               -title => "blame"}, 'B');
7434                         }
7435                         # if this is not a feed of a file history
7436                         if (!defined $file_name || $file_name ne $file) {
7437                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7438                                                              file_name=>$file, hash=>$commit),
7439                                               -title => "history"}, 'H');
7440                         }
7441                         $file = esc_path($file);
7442                         print "] ".
7443                               "$file</li>\n";
7444                 }
7445                 if ($format eq 'rss') {
7446                         print "</ul>]]>\n" .
7447                               "</content:encoded>\n" .
7448                               "</item>\n";
7449                 } elsif ($format eq 'atom') {
7450                         print "</ul>\n</div>\n" .
7451                               "</content>\n" .
7452                               "</entry>\n";
7453                 }
7454         }
7455
7456         # end of feed
7457         if ($format eq 'rss') {
7458                 print "</channel>\n</rss>\n";
7459         } elsif ($format eq 'atom') {
7460                 print "</feed>\n";
7461         }
7462 }
7463
7464 sub git_rss {
7465         git_feed('rss');
7466 }
7467
7468 sub git_atom {
7469         git_feed('atom');
7470 }
7471
7472 sub git_opml {
7473         my @list = git_get_projects_list();
7474         if (!@list) {
7475                 die_error(404, "No projects found");
7476         }
7477
7478         print $cgi->header(
7479                 -type => 'text/xml',
7480                 -charset => 'utf-8',
7481                 -content_disposition => 'inline; filename="opml.xml"');
7482
7483         print <<XML;
7484 <?xml version="1.0" encoding="utf-8"?>
7485 <opml version="1.0">
7486 <head>
7487   <title>$site_name OPML Export</title>
7488 </head>
7489 <body>
7490 <outline text="git RSS feeds">
7491 XML
7492
7493         foreach my $pr (@list) {
7494                 my %proj = %$pr;
7495                 my $head = git_get_head_hash($proj{'path'});
7496                 if (!defined $head) {
7497                         next;
7498                 }
7499                 $git_dir = "$projectroot/$proj{'path'}";
7500                 my %co = parse_commit($head);
7501                 if (!%co) {
7502                         next;
7503                 }
7504
7505                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7506                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7507                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7508                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7509         }
7510         print <<XML;
7511 </outline>
7512 </body>
7513 </opml>
7514 XML
7515 }