Lady’s Gitweb - Gitweb/blob - 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
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # group projects by category on the projects list
 120 # (enabled if this variable evaluates to true)
 121 our $projects_list_group_categories = 0;
 122
 123 # default category if none specified
 124 # (leave the empty string for no category)
 125 our $project_list_default_category = "";
 126
 127 # default order of projects list
 128 # valid values are none, project, descr, owner, and age
 129 our $default_projects_order = "project";
 130
 131 # show repository only if this file exists
 132 # (only effective if this variable evaluates to true)
 133 our $export_ok = "++GITWEB_EXPORT_OK++";
 134
 135 # show repository only if this subroutine returns true
 136 # when given the path to the project, for example:
 137 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 138 our $export_auth_hook = undef;
 139
 140 # only allow viewing of repositories also shown on the overview page
 141 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 142
 143 # list of git base URLs used for URL to where fetch project from,
 144 # i.e. full URL is "$git_base_url/$project"
 145 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 146
 147 # default blob_plain mimetype and default charset for text/plain blob
 148 our $default_blob_plain_mimetype = 'text/plain';
 149 our $default_text_plain_charset  = undef;
 150
 151 # file to use for guessing MIME types before trying /etc/mime.types
 152 # (relative to the current git repository)
 153 our $mimetypes_file = undef;
 154
 155 # assume this charset if line contains non-UTF-8 characters;
 156 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 157 # for which encoding all byte sequences are valid, for example
 158 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 159 # could be even 'utf-8' for the old behavior)
 160 our $fallback_encoding = 'latin1';
 161
 162 # rename detection options for git-diff and git-diff-tree
 163 # - default is '-M', with the cost proportional to
 164 #   (number of removed files) * (number of new files).
 165 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 166 #   (number of changed files + number of removed files) * (number of new files)
 167 # - even more costly is '-C', '--find-copies-harder' with cost
 168 #   (number of files in the original tree) * (number of new files)
 169 # - one might want to include '-B' option, e.g. '-B', '-M'
 170 our @diff_opts = ('-M'); # taken from git_commit
 171
 172 # Disables features that would allow repository owners to inject script into
 173 # the gitweb domain.
 174 our $prevent_xss = 0;
 175
 176 # Path to the highlight executable to use (must be the one from
 177 # http://www.andre-simon.de due to assumptions about parameters and output).
 178 # Useful if highlight is not installed on your webserver's PATH.
 179 # [Default: highlight]
 180 our $highlight_bin = "++HIGHLIGHT_BIN++";
 181
 182 # information about snapshot formats that gitweb is capable of serving
 183 our %known_snapshot_formats = (
 184         # name => {
 185         #       'display' => display name,
 186         #       'type' => mime type,
 187         #       'suffix' => filename suffix,
 188         #       'format' => --format for git-archive,
 189         #       'compressor' => [compressor command and arguments]
 190         #                       (array reference, optional)
 191         #       'disabled' => boolean (optional)}
 192         #
 193         'tgz' => {
 194                 'display' => 'tar.gz',
 195                 'type' => 'application/x-gzip',
 196                 'suffix' => '.tar.gz',
 197                 'format' => 'tar',
 198                 'compressor' => ['gzip', '-n']},
 199
 200         'tbz2' => {
 201                 'display' => 'tar.bz2',
 202                 'type' => 'application/x-bzip2',
 203                 'suffix' => '.tar.bz2',
 204                 'format' => 'tar',
 205                 'compressor' => ['bzip2']},
 206
 207         'txz' => {
 208                 'display' => 'tar.xz',
 209                 'type' => 'application/x-xz',
 210                 'suffix' => '.tar.xz',
 211                 'format' => 'tar',
 212                 'compressor' => ['xz'],
 213                 'disabled' => 1},
 214
 215         'zip' => {
 216                 'display' => 'zip',
 217                 'type' => 'application/x-zip',
 218                 'suffix' => '.zip',
 219                 'format' => 'zip'},
 220 );
 221
 222 # Aliases so we understand old gitweb.snapshot values in repository
 223 # configuration.
 224 our %known_snapshot_format_aliases = (
 225         'gzip'  => 'tgz',
 226         'bzip2' => 'tbz2',
 227         'xz'    => 'txz',
 228
 229         # backward compatibility: legacy gitweb config support
 230         'x-gzip' => undef, 'gz' => undef,
 231         'x-bzip2' => undef, 'bz2' => undef,
 232         'x-zip' => undef, '' => undef,
 233 );
 234
 235 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 236 # are changed, it may be appropriate to change these values too via
 237 # $GITWEB_CONFIG.
 238 our %avatar_size = (
 239         'default' => 16,
 240         'double'  => 32
 241 );
 242
 243 # Used to set the maximum load that we will still respond to gitweb queries.
 244 # If server load exceed this value then return "503 server busy" error.
 245 # If gitweb cannot determined server load, it is taken to be 0.
 246 # Leave it undefined (or set to 'undef') to turn off load checking.
 247 our $maxload = 300;
 248
 249 # configuration for 'highlight' (http://www.andre-simon.de/)
 250 # match by basename
 251 our %highlight_basename = (
 252         #'Program' => 'py',
 253         #'Library' => 'py',
 254         'SConstruct' => 'py', # SCons equivalent of Makefile
 255         'Makefile' => 'make',
 256 );
 257 # match by extension
 258 our %highlight_ext = (
 259         # main extensions, defining name of syntax;
 260         # see files in /usr/share/highlight/langDefs/ directory
 261         map { $_ => $_ }
 262                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 263         # alternate extensions, see /etc/highlight/filetypes.conf
 264         'h' => 'c',
 265         map { $_ => 'sh'  } qw(bash zsh ksh),
 266         map { $_ => 'cpp' } qw(cxx c++ cc),
 267         map { $_ => 'php' } qw(php3 php4 php5 phps),
 268         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 269         map { $_ => 'make'} qw(mak mk),
 270         map { $_ => 'xml' } qw(xhtml html htm),
 271 );
 272
 273 # You define site-wide feature defaults here; override them with
 274 # $GITWEB_CONFIG as necessary.
 275 our %feature = (
 276         # feature => {
 277         #       'sub' => feature-sub (subroutine),
 278         #       'override' => allow-override (boolean),
 279         #       'default' => [ default options...] (array reference)}
 280         #
 281         # if feature is overridable (it means that allow-override has true value),
 282         # then feature-sub will be called with default options as parameters;
 283         # return value of feature-sub indicates if to enable specified feature
 284         #
 285         # if there is no 'sub' key (no feature-sub), then feature cannot be
 286         # overridden
 287         #
 288         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 289         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 290         # is enabled
 291
 292         # Enable the 'blame' blob view, showing the last commit that modified
 293         # each line in the file. This can be very CPU-intensive.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'blame'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'blame'}{'override'} = 1;
 299         # and in project config gitweb.blame = 0|1;
 300         'blame' => {
 301                 'sub' => sub { feature_bool('blame', @_) },
 302                 'override' => 0,
 303                 'default' => [0]},
 304
 305         # Enable the 'snapshot' link, providing a compressed archive of any
 306         # tree. This can potentially generate high traffic if you have large
 307         # project.
 308
 309         # Value is a list of formats defined in %known_snapshot_formats that
 310         # you wish to offer.
 311         # To disable system wide have in $GITWEB_CONFIG
 312         # $feature{'snapshot'}{'default'} = [];
 313         # To have project specific config enable override in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'override'} = 1;
 315         # and in project config, a comma-separated list of formats or "none"
 316         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 317         'snapshot' => {
 318                 'sub' => \&feature_snapshot,
 319                 'override' => 0,
 320                 'default' => ['tgz']},
 321
 322         # Enable text search, which will list the commits which match author,
 323         # committer or commit text to a given string.  Enabled by default.
 324         # Project specific override is not supported.
 325         'search' => {
 326                 'override' => 0,
 327                 'default' => [1]},
 328
 329         # Enable grep search, which will list the files in currently selected
 330         # tree containing the given string. Enabled by default. This can be
 331         # potentially CPU-intensive, of course.
 332
 333         # To enable system wide have in $GITWEB_CONFIG
 334         # $feature{'grep'}{'default'} = [1];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'grep'}{'override'} = 1;
 337         # and in project config gitweb.grep = 0|1;
 338         'grep' => {
 339                 'sub' => sub { feature_bool('grep', @_) },
 340                 'override' => 0,
 341                 'default' => [1]},
 342
 343         # Enable the pickaxe search, which will list the commits that modified
 344         # a given string in a file. This can be practical and quite faster
 345         # alternative to 'blame', but still potentially CPU-intensive.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'pickaxe'}{'default'} = [1];
 349         # To have project specific config enable override in $GITWEB_CONFIG
 350         # $feature{'pickaxe'}{'override'} = 1;
 351         # and in project config gitweb.pickaxe = 0|1;
 352         'pickaxe' => {
 353                 'sub' => sub { feature_bool('pickaxe', @_) },
 354                 'override' => 0,
 355                 'default' => [1]},
 356
 357         # Enable showing size of blobs in a 'tree' view, in a separate
 358         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 359
 360         # To disable system wide have in $GITWEB_CONFIG
 361         # $feature{'show-sizes'}{'default'} = [0];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'show-sizes'}{'override'} = 1;
 364         # and in project config gitweb.showsizes = 0|1;
 365         'show-sizes' => {
 366                 'sub' => sub { feature_bool('showsizes', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Make gitweb use an alternative format of the URLs which can be
 371         # more readable and natural-looking: project name is embedded
 372         # directly in the path and the query string contains other
 373         # auxiliary information. All gitweb installations recognize
 374         # URL in either format; this configures in which formats gitweb
 375         # generates links.
 376
 377         # To enable system wide have in $GITWEB_CONFIG
 378         # $feature{'pathinfo'}{'default'} = [1];
 379         # Project specific override is not supported.
 380
 381         # Note that you will need to change the default location of CSS,
 382         # favicon, logo and possibly other files to an absolute URL. Also,
 383         # if gitweb.cgi serves as your indexfile, you will need to force
 384         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 385         'pathinfo' => {
 386                 'override' => 0,
 387                 'default' => [0]},
 388
 389         # Make gitweb consider projects in project root subdirectories
 390         # to be forks of existing projects. Given project $projname.git,
 391         # projects matching $projname/*.git will not be shown in the main
 392         # projects list, instead a '+' mark will be added to $projname
 393         # there and a 'forks' view will be enabled for the project, listing
 394         # all the forks. If project list is taken from a file, forks have
 395         # to be listed after the main project.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'forks'}{'default'} = [1];
 399         # Project specific override is not supported.
 400         'forks' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # Insert custom links to the action bar of all project pages.
 405         # This enables you mainly to link to third-party scripts integrating
 406         # into gitweb; e.g. git-browser for graphical history representation
 407         # or custom web-based repository administration interface.
 408
 409         # The 'default' value consists of a list of triplets in the form
 410         # (label, link, position) where position is the label after which
 411         # to insert the link and link is a format string where %n expands
 412         # to the project name, %f to the project path within the filesystem,
 413         # %h to the current hash (h gitweb parameter) and %b to the current
 414         # hash base (hb gitweb parameter); %% expands to %.
 415
 416         # To enable system wide have in $GITWEB_CONFIG e.g.
 417         # $feature{'actions'}{'default'} = [('graphiclog',
 418         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 419         # Project specific override is not supported.
 420         'actions' => {
 421                 'override' => 0,
 422                 'default' => []},
 423
 424         # Allow gitweb scan project content tags of project repository,
 425         # and display the popular Web 2.0-ish "tag cloud" near the projects
 426         # list.  Note that this is something COMPLETELY different from the
 427         # normal Git tags.
 428
 429         # gitweb by itself can show existing tags, but it does not handle
 430         # tagging itself; you need to do it externally, outside gitweb.
 431         # The format is described in git_get_project_ctags() subroutine.
 432         # You may want to install the HTML::TagCloud Perl module to get
 433         # a pretty tag cloud instead of just a list of tags.
 434
 435         # To enable system wide have in $GITWEB_CONFIG
 436         # $feature{'ctags'}{'default'} = [1];
 437         # Project specific override is not supported.
 438
 439         # In the future whether ctags editing is enabled might depend
 440         # on the value, but using 1 should always mean no editing of ctags.
 441         'ctags' => {
 442                 'override' => 0,
 443                 'default' => [0]},
 444
 445         # The maximum number of patches in a patchset generated in patch
 446         # view. Set this to 0 or undef to disable patch view, or to a
 447         # negative number to remove any limit.
 448
 449         # To disable system wide have in $GITWEB_CONFIG
 450         # $feature{'patches'}{'default'} = [0];
 451         # To have project specific config enable override in $GITWEB_CONFIG
 452         # $feature{'patches'}{'override'} = 1;
 453         # and in project config gitweb.patches = 0|n;
 454         # where n is the maximum number of patches allowed in a patchset.
 455         'patches' => {
 456                 'sub' => \&feature_patches,
 457                 'override' => 0,
 458                 'default' => [16]},
 459
 460         # Avatar support. When this feature is enabled, views such as
 461         # shortlog or commit will display an avatar associated with
 462         # the email of the committer(s) and/or author(s).
 463
 464         # Currently available providers are gravatar and picon.
 465         # If an unknown provider is specified, the feature is disabled.
 466
 467         # Gravatar depends on Digest::MD5.
 468         # Picon currently relies on the indiana.edu database.
 469
 470         # To enable system wide have in $GITWEB_CONFIG
 471         # $feature{'avatar'}{'default'} = ['<provider>'];
 472         # where <provider> is either gravatar or picon.
 473         # To have project specific config enable override in $GITWEB_CONFIG
 474         # $feature{'avatar'}{'override'} = 1;
 475         # and in project config gitweb.avatar = <provider>;
 476         'avatar' => {
 477                 'sub' => \&feature_avatar,
 478                 'override' => 0,
 479                 'default' => ['']},
 480
 481         # Enable displaying how much time and how many git commands
 482         # it took to generate and display page.  Disabled by default.
 483         # Project specific override is not supported.
 484         'timed' => {
 485                 'override' => 0,
 486                 'default' => [0]},
 487
 488         # Enable turning some links into links to actions which require
 489         # JavaScript to run (like 'blame_incremental').  Not enabled by
 490         # default.  Project specific override is currently not supported.
 491         'javascript-actions' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Syntax highlighting support. This is based on Daniel Svensson's
 496         # and Sham Chukoury's work in gitweb-xmms2.git.
 497         # It requires the 'highlight' program present in $PATH,
 498         # and therefore is disabled by default.
 499
 500         # To enable system wide have in $GITWEB_CONFIG
 501         # $feature{'highlight'}{'default'} = [1];
 502
 503         'highlight' => {
 504                 'sub' => sub { feature_bool('highlight', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable displaying of remote heads in the heads list
 509
 510         # To enable system wide have in $GITWEB_CONFIG
 511         # $feature{'remote_heads'}{'default'} = [1];
 512         # To have project specific config enable override in $GITWEB_CONFIG
 513         # $feature{'remote_heads'}{'override'} = 1;
 514         # and in project config gitweb.remote_heads = 0|1;
 515         'remote_heads' => {
 516                 'sub' => sub { feature_bool('remote_heads', @_) },
 517                 'override' => 0,
 518                 'default' => [0]},
 519 );
 520
 521 sub gitweb_get_feature {
 522         my ($name) = @_;
 523         return unless exists $feature{$name};
 524         my ($sub, $override, @defaults) = (
 525                 $feature{$name}{'sub'},
 526                 $feature{$name}{'override'},
 527                 @{$feature{$name}{'default'}});
 528         # project specific override is possible only if we have project
 529         our $git_dir; # global variable, declared later
 530         if (!$override || !defined $git_dir) {
 531                 return @defaults;
 532         }
 533         if (!defined $sub) {
 534                 warn "feature $name is not overridable";
 535                 return @defaults;
 536         }
 537         return $sub->(@defaults);
 538 }
 539
 540 # A wrapper to check if a given feature is enabled.
 541 # With this, you can say
 542 #
 543 #   my $bool_feat = gitweb_check_feature('bool_feat');
 544 #   gitweb_check_feature('bool_feat') or somecode;
 545 #
 546 # instead of
 547 #
 548 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 549 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 550 #
 551 sub gitweb_check_feature {
 552         return (gitweb_get_feature(@_))[0];
 553 }
 554
 555
 556 sub feature_bool {
 557         my $key = shift;
 558         my ($val) = git_get_project_config($key, '--bool');
 559
 560         if (!defined $val) {
 561                 return ($_[0]);
 562         } elsif ($val eq 'true') {
 563                 return (1);
 564         } elsif ($val eq 'false') {
 565                 return (0);
 566         }
 567 }
 568
 569 sub feature_snapshot {
 570         my (@fmts) = @_;
 571
 572         my ($val) = git_get_project_config('snapshot');
 573
 574         if ($val) {
 575                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 576         }
 577
 578         return @fmts;
 579 }
 580
 581 sub feature_patches {
 582         my @val = (git_get_project_config('patches', '--int'));
 583
 584         if (@val) {
 585                 return @val;
 586         }
 587
 588         return ($_[0]);
 589 }
 590
 591 sub feature_avatar {
 592         my @val = (git_get_project_config('avatar'));
 593
 594         return @val ? @val : @_;
 595 }
 596
 597 # checking HEAD file with -e is fragile if the repository was
 598 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 599 # and then pruned.
 600 sub check_head_link {
 601         my ($dir) = @_;
 602         my $headfile = "$dir/HEAD";
 603         return ((-e $headfile) ||
 604                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 605 }
 606
 607 sub check_export_ok {
 608         my ($dir) = @_;
 609         return (check_head_link($dir) &&
 610                 (!$export_ok || -e "$dir/$export_ok") &&
 611                 (!$export_auth_hook || $export_auth_hook->($dir)));
 612 }
 613
 614 # process alternate names for backward compatibility
 615 # filter out unsupported (unknown) snapshot formats
 616 sub filter_snapshot_fmts {
 617         my @fmts = @_;
 618
 619         @fmts = map {
 620                 exists $known_snapshot_format_aliases{$_} ?
 621                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 622         @fmts = grep {
 623                 exists $known_snapshot_formats{$_} &&
 624                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 625 }
 626
 627 # If it is set to code reference, it is code that it is to be run once per
 628 # request, allowing updating configurations that change with each request,
 629 # while running other code in config file only once.
 630 #
 631 # Otherwise, if it is false then gitweb would process config file only once;
 632 # if it is true then gitweb config would be run for each request.
 633 our $per_request_config = 1;
 634
 635 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 636 sub evaluate_gitweb_config {
 637         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 638         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 639         # die if there are errors parsing config file
 640         if (-e $GITWEB_CONFIG) {
 641                 do $GITWEB_CONFIG;
 642                 die $@ if $@;
 643         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 644                 do $GITWEB_CONFIG_SYSTEM;
 645                 die $@ if $@;
 646         }
 647 }
 648
 649 # Get loadavg of system, to compare against $maxload.
 650 # Currently it requires '/proc/loadavg' present to get loadavg;
 651 # if it is not present it returns 0, which means no load checking.
 652 sub get_loadavg {
 653         if( -e '/proc/loadavg' ){
 654                 open my $fd, '<', '/proc/loadavg'
 655                         or return 0;
 656                 my @load = split(/\s+/, scalar <$fd>);
 657                 close $fd;
 658
 659                 # The first three columns measure CPU and IO utilization of the last one,
 660                 # five, and 10 minute periods.  The fourth column shows the number of
 661                 # currently running processes and the total number of processes in the m/n
 662                 # format.  The last column displays the last process ID used.
 663                 return $load[0] || 0;
 664         }
 665         # additional checks for load average should go here for things that don't export
 666         # /proc/loadavg
 667
 668         return 0;
 669 }
 670
 671 # version of the core git binary
 672 our $git_version;
 673 sub evaluate_git_version {
 674         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 675         $number_of_git_cmds++;
 676 }
 677
 678 sub check_loadavg {
 679         if (defined $maxload && get_loadavg() > $maxload) {
 680                 die_error(503, "The load average on the server is too high");
 681         }
 682 }
 683
 684 # ======================================================================
 685 # input validation and dispatch
 686
 687 # input parameters can be collected from a variety of sources (presently, CGI
 688 # and PATH_INFO), so we define an %input_params hash that collects them all
 689 # together during validation: this allows subsequent uses (e.g. href()) to be
 690 # agnostic of the parameter origin
 691
 692 our %input_params = ();
 693
 694 # input parameters are stored with the long parameter name as key. This will
 695 # also be used in the href subroutine to convert parameters to their CGI
 696 # equivalent, and since the href() usage is the most frequent one, we store
 697 # the name -> CGI key mapping here, instead of the reverse.
 698 #
 699 # XXX: Warning: If you touch this, check the search form for updating,
 700 # too.
 701
 702 our @cgi_param_mapping = (
 703         project => "p",
 704         action => "a",
 705         file_name => "f",
 706         file_parent => "fp",
 707         hash => "h",
 708         hash_parent => "hp",
 709         hash_base => "hb",
 710         hash_parent_base => "hpb",
 711         page => "pg",
 712         order => "o",
 713         searchtext => "s",
 714         searchtype => "st",
 715         snapshot_format => "sf",
 716         extra_options => "opt",
 717         search_use_regexp => "sr",
 718         ctag => "by_tag",
 719         # this must be last entry (for manipulation from JavaScript)
 720         javascript => "js"
 721 );
 722 our %cgi_param_mapping = @cgi_param_mapping;
 723
 724 # we will also need to know the possible actions, for validation
 725 our %actions = (
 726         "blame" => \&git_blame,
 727         "blame_incremental" => \&git_blame_incremental,
 728         "blame_data" => \&git_blame_data,
 729         "blobdiff" => \&git_blobdiff,
 730         "blobdiff_plain" => \&git_blobdiff_plain,
 731         "blob" => \&git_blob,
 732         "blob_plain" => \&git_blob_plain,
 733         "commitdiff" => \&git_commitdiff,
 734         "commitdiff_plain" => \&git_commitdiff_plain,
 735         "commit" => \&git_commit,
 736         "forks" => \&git_forks,
 737         "heads" => \&git_heads,
 738         "history" => \&git_history,
 739         "log" => \&git_log,
 740         "patch" => \&git_patch,
 741         "patches" => \&git_patches,
 742         "remotes" => \&git_remotes,
 743         "rss" => \&git_rss,
 744         "atom" => \&git_atom,
 745         "search" => \&git_search,
 746         "search_help" => \&git_search_help,
 747         "shortlog" => \&git_shortlog,
 748         "summary" => \&git_summary,
 749         "tag" => \&git_tag,
 750         "tags" => \&git_tags,
 751         "tree" => \&git_tree,
 752         "snapshot" => \&git_snapshot,
 753         "object" => \&git_object,
 754         # those below don't need $project
 755         "opml" => \&git_opml,
 756         "project_list" => \&git_project_list,
 757         "project_index" => \&git_project_index,
 758 );
 759
 760 # finally, we have the hash of allowed extra_options for the commands that
 761 # allow them
 762 our %allowed_options = (
 763         "--no-merges" => [ qw(rss atom log shortlog history) ],
 764 );
 765
 766 # fill %input_params with the CGI parameters. All values except for 'opt'
 767 # should be single values, but opt can be an array. We should probably
 768 # build an array of parameters that can be multi-valued, but since for the time
 769 # being it's only this one, we just single it out
 770 sub evaluate_query_params {
 771         our $cgi;
 772
 773         while (my ($name, $symbol) = each %cgi_param_mapping) {
 774                 if ($symbol eq 'opt') {
 775                         $input_params{$name} = [ $cgi->param($symbol) ];
 776                 } else {
 777                         $input_params{$name} = $cgi->param($symbol);
 778                 }
 779         }
 780 }
 781
 782 # now read PATH_INFO and update the parameter list for missing parameters
 783 sub evaluate_path_info {
 784         return if defined $input_params{'project'};
 785         return if !$path_info;
 786         $path_info =~ s,^/+,,;
 787         return if !$path_info;
 788
 789         # find which part of PATH_INFO is project
 790         my $project = $path_info;
 791         $project =~ s,/+$,,;
 792         while ($project && !check_head_link("$projectroot/$project")) {
 793                 $project =~ s,/*[^/]*$,,;
 794         }
 795         return unless $project;
 796         $input_params{'project'} = $project;
 797
 798         # do not change any parameters if an action is given using the query string
 799         return if $input_params{'action'};
 800         $path_info =~ s,^\Q$project\E/*,,;
 801
 802         # next, check if we have an action
 803         my $action = $path_info;
 804         $action =~ s,/.*$,,;
 805         if (exists $actions{$action}) {
 806                 $path_info =~ s,^$action/*,,;
 807                 $input_params{'action'} = $action;
 808         }
 809
 810         # list of actions that want hash_base instead of hash, but can have no
 811         # pathname (f) parameter
 812         my @wants_base = (
 813                 'tree',
 814                 'history',
 815         );
 816
 817         # we want to catch, among others
 818         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 819         my ($parentrefname, $parentpathname, $refname, $pathname) =
 820                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 821
 822         # first, analyze the 'current' part
 823         if (defined $pathname) {
 824                 # we got "branch:filename" or "branch:dir/"
 825                 # we could use git_get_type(branch:pathname), but:
 826                 # - it needs $git_dir
 827                 # - it does a git() call
 828                 # - the convention of terminating directories with a slash
 829                 #   makes it superfluous
 830                 # - embedding the action in the PATH_INFO would make it even
 831                 #   more superfluous
 832                 $pathname =~ s,^/+,,;
 833                 if (!$pathname || substr($pathname, -1) eq "/") {
 834                         $input_params{'action'} ||= "tree";
 835                         $pathname =~ s,/$,,;
 836                 } else {
 837                         # the default action depends on whether we had parent info
 838                         # or not
 839                         if ($parentrefname) {
 840                                 $input_params{'action'} ||= "blobdiff_plain";
 841                         } else {
 842                                 $input_params{'action'} ||= "blob_plain";
 843                         }
 844                 }
 845                 $input_params{'hash_base'} ||= $refname;
 846                 $input_params{'file_name'} ||= $pathname;
 847         } elsif (defined $refname) {
 848                 # we got "branch". In this case we have to choose if we have to
 849                 # set hash or hash_base.
 850                 #
 851                 # Most of the actions without a pathname only want hash to be
 852                 # set, except for the ones specified in @wants_base that want
 853                 # hash_base instead. It should also be noted that hand-crafted
 854                 # links having 'history' as an action and no pathname or hash
 855                 # set will fail, but that happens regardless of PATH_INFO.
 856                 if (defined $parentrefname) {
 857                         # if there is parent let the default be 'shortlog' action
 858                         # (for http://git.example.com/repo.git/A..B links); if there
 859                         # is no parent, dispatch will detect type of object and set
 860                         # action appropriately if required (if action is not set)
 861                         $input_params{'action'} ||= "shortlog";
 862                 }
 863                 if ($input_params{'action'} &&
 864                     grep { $_ eq $input_params{'action'} } @wants_base) {
 865                         $input_params{'hash_base'} ||= $refname;
 866                 } else {
 867                         $input_params{'hash'} ||= $refname;
 868                 }
 869         }
 870
 871         # next, handle the 'parent' part, if present
 872         if (defined $parentrefname) {
 873                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 874                 # someproject/blobdiff/oldrev..newrev:/filename
 875                 if ($parentpathname) {
 876                         $parentpathname =~ s,^/+,,;
 877                         $parentpathname =~ s,/$,,;
 878                         $input_params{'file_parent'} ||= $parentpathname;
 879                 } else {
 880                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 881                 }
 882                 # we assume that hash_parent_base is wanted if a path was specified,
 883                 # or if the action wants hash_base instead of hash
 884                 if (defined $input_params{'file_parent'} ||
 885                         grep { $_ eq $input_params{'action'} } @wants_base) {
 886                         $input_params{'hash_parent_base'} ||= $parentrefname;
 887                 } else {
 888                         $input_params{'hash_parent'} ||= $parentrefname;
 889                 }
 890         }
 891
 892         # for the snapshot action, we allow URLs in the form
 893         # $project/snapshot/$hash.ext
 894         # where .ext determines the snapshot and gets removed from the
 895         # passed $refname to provide the $hash.
 896         #
 897         # To be able to tell that $refname includes the format extension, we
 898         # require the following two conditions to be satisfied:
 899         # - the hash input parameter MUST have been set from the $refname part
 900         #   of the URL (i.e. they must be equal)
 901         # - the snapshot format MUST NOT have been defined already (e.g. from
 902         #   CGI parameter sf)
 903         # It's also useless to try any matching unless $refname has a dot,
 904         # so we check for that too
 905         if (defined $input_params{'action'} &&
 906                 $input_params{'action'} eq 'snapshot' &&
 907                 defined $refname && index($refname, '.') != -1 &&
 908                 $refname eq $input_params{'hash'} &&
 909                 !defined $input_params{'snapshot_format'}) {
 910                 # We loop over the known snapshot formats, checking for
 911                 # extensions. Allowed extensions are both the defined suffix
 912                 # (which includes the initial dot already) and the snapshot
 913                 # format key itself, with a prepended dot
 914                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 915                         my $hash = $refname;
 916                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 917                                 next;
 918                         }
 919                         my $sfx = $1;
 920                         # a valid suffix was found, so set the snapshot format
 921                         # and reset the hash parameter
 922                         $input_params{'snapshot_format'} = $fmt;
 923                         $input_params{'hash'} = $hash;
 924                         # we also set the format suffix to the one requested
 925                         # in the URL: this way a request for e.g. .tgz returns
 926                         # a .tgz instead of a .tar.gz
 927                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 928                         last;
 929                 }
 930         }
 931 }
 932
 933 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 934      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 935      $searchtext, $search_regexp);
 936 sub evaluate_and_validate_params {
 937         our $action = $input_params{'action'};
 938         if (defined $action) {
 939                 if (!validate_action($action)) {
 940                         die_error(400, "Invalid action parameter");
 941                 }
 942         }
 943
 944         # parameters which are pathnames
 945         our $project = $input_params{'project'};
 946         if (defined $project) {
 947                 if (!validate_project($project)) {
 948                         undef $project;
 949                         die_error(404, "No such project");
 950                 }
 951         }
 952
 953         our $file_name = $input_params{'file_name'};
 954         if (defined $file_name) {
 955                 if (!validate_pathname($file_name)) {
 956                         die_error(400, "Invalid file parameter");
 957                 }
 958         }
 959
 960         our $file_parent = $input_params{'file_parent'};
 961         if (defined $file_parent) {
 962                 if (!validate_pathname($file_parent)) {
 963                         die_error(400, "Invalid file parent parameter");
 964                 }
 965         }
 966
 967         # parameters which are refnames
 968         our $hash = $input_params{'hash'};
 969         if (defined $hash) {
 970                 if (!validate_refname($hash)) {
 971                         die_error(400, "Invalid hash parameter");
 972                 }
 973         }
 974
 975         our $hash_parent = $input_params{'hash_parent'};
 976         if (defined $hash_parent) {
 977                 if (!validate_refname($hash_parent)) {
 978                         die_error(400, "Invalid hash parent parameter");
 979                 }
 980         }
 981
 982         our $hash_base = $input_params{'hash_base'};
 983         if (defined $hash_base) {
 984                 if (!validate_refname($hash_base)) {
 985                         die_error(400, "Invalid hash base parameter");
 986                 }
 987         }
 988
 989         our @extra_options = @{$input_params{'extra_options'}};
 990         # @extra_options is always defined, since it can only be (currently) set from
 991         # CGI, and $cgi->param() returns the empty array in array context if the param
 992         # is not set
 993         foreach my $opt (@extra_options) {
 994                 if (not exists $allowed_options{$opt}) {
 995                         die_error(400, "Invalid option parameter");
 996                 }
 997                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 998                         die_error(400, "Invalid option parameter for this action");
 999                 }
1000         }
1001
1002         our $hash_parent_base = $input_params{'hash_parent_base'};
1003         if (defined $hash_parent_base) {
1004                 if (!validate_refname($hash_parent_base)) {
1005                         die_error(400, "Invalid hash parent base parameter");
1006                 }
1007         }
1008
1009         # other parameters
1010         our $page = $input_params{'page'};
1011         if (defined $page) {
1012                 if ($page =~ m/[^0-9]/) {
1013                         die_error(400, "Invalid page parameter");
1014                 }
1015         }
1016
1017         our $searchtype = $input_params{'searchtype'};
1018         if (defined $searchtype) {
1019                 if ($searchtype =~ m/[^a-z]/) {
1020                         die_error(400, "Invalid searchtype parameter");
1021                 }
1022         }
1023
1024         our $search_use_regexp = $input_params{'search_use_regexp'};
1025
1026         our $searchtext = $input_params{'searchtext'};
1027         our $search_regexp;
1028         if (defined $searchtext) {
1029                 if (length($searchtext) < 2) {
1030                         die_error(403, "At least two characters are required for search parameter");
1031                 }
1032                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1033         }
1034 }
1035
1036 # path to the current git repository
1037 our $git_dir;
1038 sub evaluate_git_dir {
1039         our $git_dir = "$projectroot/$project" if $project;
1040 }
1041
1042 our (@snapshot_fmts, $git_avatar);
1043 sub configure_gitweb_features {
1044         # list of supported snapshot formats
1045         our @snapshot_fmts = gitweb_get_feature('snapshot');
1046         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1047
1048         # check that the avatar feature is set to a known provider name,
1049         # and for each provider check if the dependencies are satisfied.
1050         # if the provider name is invalid or the dependencies are not met,
1051         # reset $git_avatar to the empty string.
1052         our ($git_avatar) = gitweb_get_feature('avatar');
1053         if ($git_avatar eq 'gravatar') {
1054                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1055         } elsif ($git_avatar eq 'picon') {
1056                 # no dependencies
1057         } else {
1058                 $git_avatar = '';
1059         }
1060 }
1061
1062 # custom error handler: 'die <message>' is Internal Server Error
1063 sub handle_errors_html {
1064         my $msg = shift; # it is already HTML escaped
1065
1066         # to avoid infinite loop where error occurs in die_error,
1067         # change handler to default handler, disabling handle_errors_html
1068         set_message("Error occured when inside die_error:\n$msg");
1069
1070         # you cannot jump out of die_error when called as error handler;
1071         # the subroutine set via CGI::Carp::set_message is called _after_
1072         # HTTP headers are already written, so it cannot write them itself
1073         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1074 }
1075 set_message(\&handle_errors_html);
1076
1077 # dispatch
1078 sub dispatch {
1079         if (!defined $action) {
1080                 if (defined $hash) {
1081                         $action = git_get_type($hash);
1082                 } elsif (defined $hash_base && defined $file_name) {
1083                         $action = git_get_type("$hash_base:$file_name");
1084                 } elsif (defined $project) {
1085                         $action = 'summary';
1086                 } else {
1087                         $action = 'project_list';
1088                 }
1089         }
1090         if (!defined($actions{$action})) {
1091                 die_error(400, "Unknown action");
1092         }
1093         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1094             !$project) {
1095                 die_error(400, "Project needed");
1096         }
1097         $actions{$action}->();
1098 }
1099
1100 sub reset_timer {
1101         our $t0 = [ gettimeofday() ]
1102                 if defined $t0;
1103         our $number_of_git_cmds = 0;
1104 }
1105
1106 our $first_request = 1;
1107 sub run_request {
1108         reset_timer();
1109
1110         evaluate_uri();
1111         if ($first_request) {
1112                 evaluate_gitweb_config();
1113                 evaluate_git_version();
1114         }
1115         if ($per_request_config) {
1116                 if (ref($per_request_config) eq 'CODE') {
1117                         $per_request_config->();
1118                 } elsif (!$first_request) {
1119                         evaluate_gitweb_config();
1120                 }
1121         }
1122         check_loadavg();
1123
1124         # $projectroot and $projects_list might be set in gitweb config file
1125         $projects_list ||= $projectroot;
1126
1127         evaluate_query_params();
1128         evaluate_path_info();
1129         evaluate_and_validate_params();
1130         evaluate_git_dir();
1131
1132         configure_gitweb_features();
1133
1134         dispatch();
1135 }
1136
1137 our $is_last_request = sub { 1 };
1138 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1139 our $CGI = 'CGI';
1140 our $cgi;
1141 sub configure_as_fcgi {
1142         require CGI::Fast;
1143         our $CGI = 'CGI::Fast';
1144
1145         my $request_number = 0;
1146         # let each child service 100 requests
1147         our $is_last_request = sub { ++$request_number > 100 };
1148 }
1149 sub evaluate_argv {
1150         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1151         configure_as_fcgi()
1152                 if $script_name =~ /\.fcgi$/;
1153
1154         return unless (@ARGV);
1155
1156         require Getopt::Long;
1157         Getopt::Long::GetOptions(
1158                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1159                 'nproc|n=i' => sub {
1160                         my ($arg, $val) = @_;
1161                         return unless eval { require FCGI::ProcManager; 1; };
1162                         my $proc_manager = FCGI::ProcManager->new({
1163                                 n_processes => $val,
1164                         });
1165                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1166                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1167                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1168                 },
1169         );
1170 }
1171
1172 sub run {
1173         evaluate_argv();
1174
1175         $first_request = 1;
1176         $pre_listen_hook->()
1177                 if $pre_listen_hook;
1178
1179  REQUEST:
1180         while ($cgi = $CGI->new()) {
1181                 $pre_dispatch_hook->()
1182                         if $pre_dispatch_hook;
1183
1184                 run_request();
1185
1186                 $post_dispatch_hook->()
1187                         if $post_dispatch_hook;
1188                 $first_request = 0;
1189
1190                 last REQUEST if ($is_last_request->());
1191         }
1192
1193  DONE_GITWEB:
1194         1;
1195 }
1196
1197 run();
1198
1199 if (defined caller) {
1200         # wrapped in a subroutine processing requests,
1201         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1202         return;
1203 } else {
1204         # pure CGI script, serving single request
1205         exit;
1206 }
1207
1208 ## ======================================================================
1209 ## action links
1210
1211 # possible values of extra options
1212 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1213 # -replay => 1      - start from a current view (replay with modifications)
1214 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1215 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1216 sub href {
1217         my %params = @_;
1218         # default is to use -absolute url() i.e. $my_uri
1219         my $href = $params{-full} ? $my_url : $my_uri;
1220
1221         # implicit -replay, must be first of implicit params
1222         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1223
1224         $params{'project'} = $project unless exists $params{'project'};
1225
1226         if ($params{-replay}) {
1227                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1228                         if (!exists $params{$name}) {
1229                                 $params{$name} = $input_params{$name};
1230                         }
1231                 }
1232         }
1233
1234         my $use_pathinfo = gitweb_check_feature('pathinfo');
1235         if (defined $params{'project'} &&
1236             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1237                 # try to put as many parameters as possible in PATH_INFO:
1238                 #   - project name
1239                 #   - action
1240                 #   - hash_parent or hash_parent_base:/file_parent
1241                 #   - hash or hash_base:/filename
1242                 #   - the snapshot_format as an appropriate suffix
1243
1244                 # When the script is the root DirectoryIndex for the domain,
1245                 # $href here would be something like http://gitweb.example.com/
1246                 # Thus, we strip any trailing / from $href, to spare us double
1247                 # slashes in the final URL
1248                 $href =~ s,/$,,;
1249
1250                 # Then add the project name, if present
1251                 $href .= "/".esc_path_info($params{'project'});
1252                 delete $params{'project'};
1253
1254                 # since we destructively absorb parameters, we keep this
1255                 # boolean that remembers if we're handling a snapshot
1256                 my $is_snapshot = $params{'action'} eq 'snapshot';
1257
1258                 # Summary just uses the project path URL, any other action is
1259                 # added to the URL
1260                 if (defined $params{'action'}) {
1261                         $href .= "/".esc_path_info($params{'action'})
1262                                 unless $params{'action'} eq 'summary';
1263                         delete $params{'action'};
1264                 }
1265
1266                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1267                 # stripping nonexistent or useless pieces
1268                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1269                         || $params{'hash_parent'} || $params{'hash'});
1270                 if (defined $params{'hash_base'}) {
1271                         if (defined $params{'hash_parent_base'}) {
1272                                 $href .= esc_path_info($params{'hash_parent_base'});
1273                                 # skip the file_parent if it's the same as the file_name
1274                                 if (defined $params{'file_parent'}) {
1275                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1276                                                 delete $params{'file_parent'};
1277                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1278                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1279                                                 delete $params{'file_parent'};
1280                                         }
1281                                 }
1282                                 $href .= "..";
1283                                 delete $params{'hash_parent'};
1284                                 delete $params{'hash_parent_base'};
1285                         } elsif (defined $params{'hash_parent'}) {
1286                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1287                                 delete $params{'hash_parent'};
1288                         }
1289
1290                         $href .= esc_path_info($params{'hash_base'});
1291                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1292                                 $href .= ":/".esc_path_info($params{'file_name'});
1293                                 delete $params{'file_name'};
1294                         }
1295                         delete $params{'hash'};
1296                         delete $params{'hash_base'};
1297                 } elsif (defined $params{'hash'}) {
1298                         $href .= esc_path_info($params{'hash'});
1299                         delete $params{'hash'};
1300                 }
1301
1302                 # If the action was a snapshot, we can absorb the
1303                 # snapshot_format parameter too
1304                 if ($is_snapshot) {
1305                         my $fmt = $params{'snapshot_format'};
1306                         # snapshot_format should always be defined when href()
1307                         # is called, but just in case some code forgets, we
1308                         # fall back to the default
1309                         $fmt ||= $snapshot_fmts[0];
1310                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1311                         delete $params{'snapshot_format'};
1312                 }
1313         }
1314
1315         # now encode the parameters explicitly
1316         my @result = ();
1317         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1318                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1319                 if (defined $params{$name}) {
1320                         if (ref($params{$name}) eq "ARRAY") {
1321                                 foreach my $par (@{$params{$name}}) {
1322                                         push @result, $symbol . "=" . esc_param($par);
1323                                 }
1324                         } else {
1325                                 push @result, $symbol . "=" . esc_param($params{$name});
1326                         }
1327                 }
1328         }
1329         $href .= "?" . join(';', @result) if scalar @result;
1330
1331         # final transformation: trailing spaces must be escaped (URI-encoded)
1332         $href =~ s/(\s+)$/CGI::escape($1)/e;
1333
1334         if ($params{-anchor}) {
1335                 $href .= "#".esc_param($params{-anchor});
1336         }
1337
1338         return $href;
1339 }
1340
1341
1342 ## ======================================================================
1343 ## validation, quoting/unquoting and escaping
1344
1345 sub validate_action {
1346         my $input = shift || return undef;
1347         return undef unless exists $actions{$input};
1348         return $input;
1349 }
1350
1351 sub validate_project {
1352         my $input = shift || return undef;
1353         if (!validate_pathname($input) ||
1354                 !(-d "$projectroot/$input") ||
1355                 !check_export_ok("$projectroot/$input") ||
1356                 ($strict_export && !project_in_list($input))) {
1357                 return undef;
1358         } else {
1359                 return $input;
1360         }
1361 }
1362
1363 sub validate_pathname {
1364         my $input = shift || return undef;
1365
1366         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1367         # at the beginning, at the end, and between slashes.
1368         # also this catches doubled slashes
1369         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1370                 return undef;
1371         }
1372         # no null characters
1373         if ($input =~ m!\0!) {
1374                 return undef;
1375         }
1376         return $input;
1377 }
1378
1379 sub validate_refname {
1380         my $input = shift || return undef;
1381
1382         # textual hashes are O.K.
1383         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1384                 return $input;
1385         }
1386         # it must be correct pathname
1387         $input = validate_pathname($input)
1388                 or return undef;
1389         # restrictions on ref name according to git-check-ref-format
1390         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1391                 return undef;
1392         }
1393         return $input;
1394 }
1395
1396 # decode sequences of octets in utf8 into Perl's internal form,
1397 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1398 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1399 sub to_utf8 {
1400         my $str = shift;
1401         return undef unless defined $str;
1402         if (utf8::valid($str)) {
1403                 utf8::decode($str);
1404                 return $str;
1405         } else {
1406                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1407         }
1408 }
1409
1410 # quote unsafe chars, but keep the slash, even when it's not
1411 # correct, but quoted slashes look too horrible in bookmarks
1412 sub esc_param {
1413         my $str = shift;
1414         return undef unless defined $str;
1415         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1416         $str =~ s/ /\+/g;
1417         return $str;
1418 }
1419
1420 # the quoting rules for path_info fragment are slightly different
1421 sub esc_path_info {
1422         my $str = shift;
1423         return undef unless defined $str;
1424
1425         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1426         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1427
1428         return $str;
1429 }
1430
1431 # quote unsafe chars in whole URL, so some characters cannot be quoted
1432 sub esc_url {
1433         my $str = shift;
1434         return undef unless defined $str;
1435         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1436         $str =~ s/ /\+/g;
1437         return $str;
1438 }
1439
1440 # quote unsafe characters in HTML attributes
1441 sub esc_attr {
1442
1443         # for XHTML conformance escaping '"' to '&quot;' is not enough
1444         return esc_html(@_);
1445 }
1446
1447 # replace invalid utf8 character with SUBSTITUTION sequence
1448 sub esc_html {
1449         my $str = shift;
1450         my %opts = @_;
1451
1452         return undef unless defined $str;
1453
1454         $str = to_utf8($str);
1455         $str = $cgi->escapeHTML($str);
1456         if ($opts{'-nbsp'}) {
1457                 $str =~ s/ /&nbsp;/g;
1458         }
1459         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1460         return $str;
1461 }
1462
1463 # quote control characters and escape filename to HTML
1464 sub esc_path {
1465         my $str = shift;
1466         my %opts = @_;
1467
1468         return undef unless defined $str;
1469
1470         $str = to_utf8($str);
1471         $str = $cgi->escapeHTML($str);
1472         if ($opts{'-nbsp'}) {
1473                 $str =~ s/ /&nbsp;/g;
1474         }
1475         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1476         return $str;
1477 }
1478
1479 # Make control characters "printable", using character escape codes (CEC)
1480 sub quot_cec {
1481         my $cntrl = shift;
1482         my %opts = @_;
1483         my %es = ( # character escape codes, aka escape sequences
1484                 "\t" => '\t',   # tab            (HT)
1485                 "\n" => '\n',   # line feed      (LF)
1486                 "\r" => '\r',   # carrige return (CR)
1487                 "\f" => '\f',   # form feed      (FF)
1488                 "\b" => '\b',   # backspace      (BS)
1489                 "\a" => '\a',   # alarm (bell)   (BEL)
1490                 "\e" => '\e',   # escape         (ESC)
1491                 "\013" => '\v', # vertical tab   (VT)
1492                 "\000" => '\0', # nul character  (NUL)
1493         );
1494         my $chr = ( (exists $es{$cntrl})
1495                     ? $es{$cntrl}
1496                     : sprintf('\%2x', ord($cntrl)) );
1497         if ($opts{-nohtml}) {
1498                 return $chr;
1499         } else {
1500                 return "<span class=\"cntrl\">$chr</span>";
1501         }
1502 }
1503
1504 # Alternatively use unicode control pictures codepoints,
1505 # Unicode "printable representation" (PR)
1506 sub quot_upr {
1507         my $cntrl = shift;
1508         my %opts = @_;
1509
1510         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1511         if ($opts{-nohtml}) {
1512                 return $chr;
1513         } else {
1514                 return "<span class=\"cntrl\">$chr</span>";
1515         }
1516 }
1517
1518 # git may return quoted and escaped filenames
1519 sub unquote {
1520         my $str = shift;
1521
1522         sub unq {
1523                 my $seq = shift;
1524                 my %es = ( # character escape codes, aka escape sequences
1525                         't' => "\t",   # tab            (HT, TAB)
1526                         'n' => "\n",   # newline        (NL)
1527                         'r' => "\r",   # return         (CR)
1528                         'f' => "\f",   # form feed      (FF)
1529                         'b' => "\b",   # backspace      (BS)
1530                         'a' => "\a",   # alarm (bell)   (BEL)
1531                         'e' => "\e",   # escape         (ESC)
1532                         'v' => "\013", # vertical tab   (VT)
1533                 );
1534
1535                 if ($seq =~ m/^[0-7]{1,3}$/) {
1536                         # octal char sequence
1537                         return chr(oct($seq));
1538                 } elsif (exists $es{$seq}) {
1539                         # C escape sequence, aka character escape code
1540                         return $es{$seq};
1541                 }
1542                 # quoted ordinary character
1543                 return $seq;
1544         }
1545
1546         if ($str =~ m/^"(.*)"$/) {
1547                 # needs unquoting
1548                 $str = $1;
1549                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1550         }
1551         return $str;
1552 }
1553
1554 # escape tabs (convert tabs to spaces)
1555 sub untabify {
1556         my $line = shift;
1557
1558         while ((my $pos = index($line, "\t")) != -1) {
1559                 if (my $count = (8 - ($pos % 8))) {
1560                         my $spaces = ' ' x $count;
1561                         $line =~ s/\t/$spaces/;
1562                 }
1563         }
1564
1565         return $line;
1566 }
1567
1568 sub project_in_list {
1569         my $project = shift;
1570         my @list = git_get_projects_list();
1571         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1572 }
1573
1574 ## ----------------------------------------------------------------------
1575 ## HTML aware string manipulation
1576
1577 # Try to chop given string on a word boundary between position
1578 # $len and $len+$add_len. If there is no word boundary there,
1579 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1580 # (marking chopped part) would be longer than given string.
1581 sub chop_str {
1582         my $str = shift;
1583         my $len = shift;
1584         my $add_len = shift || 10;
1585         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1586
1587         # Make sure perl knows it is utf8 encoded so we don't
1588         # cut in the middle of a utf8 multibyte char.
1589         $str = to_utf8($str);
1590
1591         # allow only $len chars, but don't cut a word if it would fit in $add_len
1592         # if it doesn't fit, cut it if it's still longer than the dots we would add
1593         # remove chopped character entities entirely
1594
1595         # when chopping in the middle, distribute $len into left and right part
1596         # return early if chopping wouldn't make string shorter
1597         if ($where eq 'center') {
1598                 return $str if ($len + 5 >= length($str)); # filler is length 5
1599                 $len = int($len/2);
1600         } else {
1601                 return $str if ($len + 4 >= length($str)); # filler is length 4
1602         }
1603
1604         # regexps: ending and beginning with word part up to $add_len
1605         my $endre = qr/.{$len}\w{0,$add_len}/;
1606         my $begre = qr/\w{0,$add_len}.{$len}/;
1607
1608         if ($where eq 'left') {
1609                 $str =~ m/^(.*?)($begre)$/;
1610                 my ($lead, $body) = ($1, $2);
1611                 if (length($lead) > 4) {
1612                         $lead = " ...";
1613                 }
1614                 return "$lead$body";
1615
1616         } elsif ($where eq 'center') {
1617                 $str =~ m/^($endre)(.*)$/;
1618                 my ($left, $str)  = ($1, $2);
1619                 $str =~ m/^(.*?)($begre)$/;
1620                 my ($mid, $right) = ($1, $2);
1621                 if (length($mid) > 5) {
1622                         $mid = " ... ";
1623                 }
1624                 return "$left$mid$right";
1625
1626         } else {
1627                 $str =~ m/^($endre)(.*)$/;
1628                 my $body = $1;
1629                 my $tail = $2;
1630                 if (length($tail) > 4) {
1631                         $tail = "... ";
1632                 }
1633                 return "$body$tail";
1634         }
1635 }
1636
1637 # takes the same arguments as chop_str, but also wraps a <span> around the
1638 # result with a title attribute if it does get chopped. Additionally, the
1639 # string is HTML-escaped.
1640 sub chop_and_escape_str {
1641         my ($str) = @_;
1642
1643         my $chopped = chop_str(@_);
1644         if ($chopped eq $str) {
1645                 return esc_html($chopped);
1646         } else {
1647                 $str =~ s/[[:cntrl:]]/?/g;
1648                 return $cgi->span({-title=>$str}, esc_html($chopped));
1649         }
1650 }
1651
1652 ## ----------------------------------------------------------------------
1653 ## functions returning short strings
1654
1655 # CSS class for given age value (in seconds)
1656 sub age_class {
1657         my $age = shift;
1658
1659         if (!defined $age) {
1660                 return "noage";
1661         } elsif ($age < 60*60*2) {
1662                 return "age0";
1663         } elsif ($age < 60*60*24*2) {
1664                 return "age1";
1665         } else {
1666                 return "age2";
1667         }
1668 }
1669
1670 # convert age in seconds to "nn units ago" string
1671 sub age_string {
1672         my $age = shift;
1673         my $age_str;
1674
1675         if ($age > 60*60*24*365*2) {
1676                 $age_str = (int $age/60/60/24/365);
1677                 $age_str .= " years ago";
1678         } elsif ($age > 60*60*24*(365/12)*2) {
1679                 $age_str = int $age/60/60/24/(365/12);
1680                 $age_str .= " months ago";
1681         } elsif ($age > 60*60*24*7*2) {
1682                 $age_str = int $age/60/60/24/7;
1683                 $age_str .= " weeks ago";
1684         } elsif ($age > 60*60*24*2) {
1685                 $age_str = int $age/60/60/24;
1686                 $age_str .= " days ago";
1687         } elsif ($age > 60*60*2) {
1688                 $age_str = int $age/60/60;
1689                 $age_str .= " hours ago";
1690         } elsif ($age > 60*2) {
1691                 $age_str = int $age/60;
1692                 $age_str .= " min ago";
1693         } elsif ($age > 2) {
1694                 $age_str = int $age;
1695                 $age_str .= " sec ago";
1696         } else {
1697                 $age_str .= " right now";
1698         }
1699         return $age_str;
1700 }
1701
1702 use constant {
1703         S_IFINVALID => 0030000,
1704         S_IFGITLINK => 0160000,
1705 };
1706
1707 # submodule/subproject, a commit object reference
1708 sub S_ISGITLINK {
1709         my $mode = shift;
1710
1711         return (($mode & S_IFMT) == S_IFGITLINK)
1712 }
1713
1714 # convert file mode in octal to symbolic file mode string
1715 sub mode_str {
1716         my $mode = oct shift;
1717
1718         if (S_ISGITLINK($mode)) {
1719                 return 'm---------';
1720         } elsif (S_ISDIR($mode & S_IFMT)) {
1721                 return 'drwxr-xr-x';
1722         } elsif (S_ISLNK($mode)) {
1723                 return 'lrwxrwxrwx';
1724         } elsif (S_ISREG($mode)) {
1725                 # git cares only about the executable bit
1726                 if ($mode & S_IXUSR) {
1727                         return '-rwxr-xr-x';
1728                 } else {
1729                         return '-rw-r--r--';
1730                 };
1731         } else {
1732                 return '----------';
1733         }
1734 }
1735
1736 # convert file mode in octal to file type string
1737 sub file_type {
1738         my $mode = shift;
1739
1740         if ($mode !~ m/^[0-7]+$/) {
1741                 return $mode;
1742         } else {
1743                 $mode = oct $mode;
1744         }
1745
1746         if (S_ISGITLINK($mode)) {
1747                 return "submodule";
1748         } elsif (S_ISDIR($mode & S_IFMT)) {
1749                 return "directory";
1750         } elsif (S_ISLNK($mode)) {
1751                 return "symlink";
1752         } elsif (S_ISREG($mode)) {
1753                 return "file";
1754         } else {
1755                 return "unknown";
1756         }
1757 }
1758
1759 # convert file mode in octal to file type description string
1760 sub file_type_long {
1761         my $mode = shift;
1762
1763         if ($mode !~ m/^[0-7]+$/) {
1764                 return $mode;
1765         } else {
1766                 $mode = oct $mode;
1767         }
1768
1769         if (S_ISGITLINK($mode)) {
1770                 return "submodule";
1771         } elsif (S_ISDIR($mode & S_IFMT)) {
1772                 return "directory";
1773         } elsif (S_ISLNK($mode)) {
1774                 return "symlink";
1775         } elsif (S_ISREG($mode)) {
1776                 if ($mode & S_IXUSR) {
1777                         return "executable";
1778                 } else {
1779                         return "file";
1780                 };
1781         } else {
1782                 return "unknown";
1783         }
1784 }
1785
1786
1787 ## ----------------------------------------------------------------------
1788 ## functions returning short HTML fragments, or transforming HTML fragments
1789 ## which don't belong to other sections
1790
1791 # format line of commit message.
1792 sub format_log_line_html {
1793         my $line = shift;
1794
1795         $line = esc_html($line, -nbsp=>1);
1796         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1797                 $cgi->a({-href => href(action=>"object", hash=>$1),
1798                                         -class => "text"}, $1);
1799         }eg;
1800
1801         return $line;
1802 }
1803
1804 # format marker of refs pointing to given object
1805
1806 # the destination action is chosen based on object type and current context:
1807 # - for annotated tags, we choose the tag view unless it's the current view
1808 #   already, in which case we go to shortlog view
1809 # - for other refs, we keep the current view if we're in history, shortlog or
1810 #   log view, and select shortlog otherwise
1811 sub format_ref_marker {
1812         my ($refs, $id) = @_;
1813         my $markers = '';
1814
1815         if (defined $refs->{$id}) {
1816                 foreach my $ref (@{$refs->{$id}}) {
1817                         # this code exploits the fact that non-lightweight tags are the
1818                         # only indirect objects, and that they are the only objects for which
1819                         # we want to use tag instead of shortlog as action
1820                         my ($type, $name) = qw();
1821                         my $indirect = ($ref =~ s/\^\{\}$//);
1822                         # e.g. tags/v2.6.11 or heads/next
1823                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1824                                 $type = $1;
1825                                 $name = $2;
1826                         } else {
1827                                 $type = "ref";
1828                                 $name = $ref;
1829                         }
1830
1831                         my $class = $type;
1832                         $class .= " indirect" if $indirect;
1833
1834                         my $dest_action = "shortlog";
1835
1836                         if ($indirect) {
1837                                 $dest_action = "tag" unless $action eq "tag";
1838                         } elsif ($action =~ /^(history|(short)?log)$/) {
1839                                 $dest_action = $action;
1840                         }
1841
1842                         my $dest = "";
1843                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1844                         $dest .= $ref;
1845
1846                         my $link = $cgi->a({
1847                                 -href => href(
1848                                         action=>$dest_action,
1849                                         hash=>$dest
1850                                 )}, $name);
1851
1852                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1853                                 $link . "</span>";
1854                 }
1855         }
1856
1857         if ($markers) {
1858                 return ' <span class="refs">'. $markers . '</span>';
1859         } else {
1860                 return "";
1861         }
1862 }
1863
1864 # format, perhaps shortened and with markers, title line
1865 sub format_subject_html {
1866         my ($long, $short, $href, $extra) = @_;
1867         $extra = '' unless defined($extra);
1868
1869         if (length($short) < length($long)) {
1870                 $long =~ s/[[:cntrl:]]/?/g;
1871                 return $cgi->a({-href => $href, -class => "list subject",
1872                                 -title => to_utf8($long)},
1873                        esc_html($short)) . $extra;
1874         } else {
1875                 return $cgi->a({-href => $href, -class => "list subject"},
1876                        esc_html($long)) . $extra;
1877         }
1878 }
1879
1880 # Rather than recomputing the url for an email multiple times, we cache it
1881 # after the first hit. This gives a visible benefit in views where the avatar
1882 # for the same email is used repeatedly (e.g. shortlog).
1883 # The cache is shared by all avatar engines (currently gravatar only), which
1884 # are free to use it as preferred. Since only one avatar engine is used for any
1885 # given page, there's no risk for cache conflicts.
1886 our %avatar_cache = ();
1887
1888 # Compute the picon url for a given email, by using the picon search service over at
1889 # http://www.cs.indiana.edu/picons/search.html
1890 sub picon_url {
1891         my $email = lc shift;
1892         if (!$avatar_cache{$email}) {
1893                 my ($user, $domain) = split('@', $email);
1894                 $avatar_cache{$email} =
1895                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1896                         "$domain/$user/" .
1897                         "users+domains+unknown/up/single";
1898         }
1899         return $avatar_cache{$email};
1900 }
1901
1902 # Compute the gravatar url for a given email, if it's not in the cache already.
1903 # Gravatar stores only the part of the URL before the size, since that's the
1904 # one computationally more expensive. This also allows reuse of the cache for
1905 # different sizes (for this particular engine).
1906 sub gravatar_url {
1907         my $email = lc shift;
1908         my $size = shift;
1909         $avatar_cache{$email} ||=
1910                 "http://www.gravatar.com/avatar/" .
1911                         Digest::MD5::md5_hex($email) . "?s=";
1912         return $avatar_cache{$email} . $size;
1913 }
1914
1915 # Insert an avatar for the given $email at the given $size if the feature
1916 # is enabled.
1917 sub git_get_avatar {
1918         my ($email, %opts) = @_;
1919         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1920         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1921         $opts{-size} ||= 'default';
1922         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1923         my $url = "";
1924         if ($git_avatar eq 'gravatar') {
1925                 $url = gravatar_url($email, $size);
1926         } elsif ($git_avatar eq 'picon') {
1927                 $url = picon_url($email);
1928         }
1929         # Other providers can be added by extending the if chain, defining $url
1930         # as needed. If no variant puts something in $url, we assume avatars
1931         # are completely disabled/unavailable.
1932         if ($url) {
1933                 return $pre_white .
1934                        "<img width=\"$size\" " .
1935                             "class=\"avatar\" " .
1936                             "src=\"".esc_url($url)."\" " .
1937                             "alt=\"\" " .
1938                        "/>" . $post_white;
1939         } else {
1940                 return "";
1941         }
1942 }
1943
1944 sub format_search_author {
1945         my ($author, $searchtype, $displaytext) = @_;
1946         my $have_search = gitweb_check_feature('search');
1947
1948         if ($have_search) {
1949                 my $performed = "";
1950                 if ($searchtype eq 'author') {
1951                         $performed = "authored";
1952                 } elsif ($searchtype eq 'committer') {
1953                         $performed = "committed";
1954                 }
1955
1956                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1957                                 searchtext=>$author,
1958                                 searchtype=>$searchtype), class=>"list",
1959                                 title=>"Search for commits $performed by $author"},
1960                                 $displaytext);
1961
1962         } else {
1963                 return $displaytext;
1964         }
1965 }
1966
1967 # format the author name of the given commit with the given tag
1968 # the author name is chopped and escaped according to the other
1969 # optional parameters (see chop_str).
1970 sub format_author_html {
1971         my $tag = shift;
1972         my $co = shift;
1973         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1974         return "<$tag class=\"author\">" .
1975                format_search_author($co->{'author_name'}, "author",
1976                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1977                        $author) .
1978                "</$tag>";
1979 }
1980
1981 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1982 sub format_git_diff_header_line {
1983         my $line = shift;
1984         my $diffinfo = shift;
1985         my ($from, $to) = @_;
1986
1987         if ($diffinfo->{'nparents'}) {
1988                 # combined diff
1989                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1990                 if ($to->{'href'}) {
1991                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1992                                          esc_path($to->{'file'}));
1993                 } else { # file was deleted (no href)
1994                         $line .= esc_path($to->{'file'});
1995                 }
1996         } else {
1997                 # "ordinary" diff
1998                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1999                 if ($from->{'href'}) {
2000                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2001                                          'a/' . esc_path($from->{'file'}));
2002                 } else { # file was added (no href)
2003                         $line .= 'a/' . esc_path($from->{'file'});
2004                 }
2005                 $line .= ' ';
2006                 if ($to->{'href'}) {
2007                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2008                                          'b/' . esc_path($to->{'file'}));
2009                 } else { # file was deleted
2010                         $line .= 'b/' . esc_path($to->{'file'});
2011                 }
2012         }
2013
2014         return "<div class=\"diff header\">$line</div>\n";
2015 }
2016
2017 # format extended diff header line, before patch itself
2018 sub format_extended_diff_header_line {
2019         my $line = shift;
2020         my $diffinfo = shift;
2021         my ($from, $to) = @_;
2022
2023         # match <path>
2024         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2025                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2026                                        esc_path($from->{'file'}));
2027         }
2028         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2029                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2030                                  esc_path($to->{'file'}));
2031         }
2032         # match single <mode>
2033         if ($line =~ m/\s(\d{6})$/) {
2034                 $line .= '<span class="info"> (' .
2035                          file_type_long($1) .
2036                          ')</span>';
2037         }
2038         # match <hash>
2039         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2040                 # can match only for combined diff
2041                 $line = 'index ';
2042                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2043                         if ($from->{'href'}[$i]) {
2044                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2045                                                   -class=>"hash"},
2046                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2047                         } else {
2048                                 $line .= '0' x 7;
2049                         }
2050                         # separator
2051                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2052                 }
2053                 $line .= '..';
2054                 if ($to->{'href'}) {
2055                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2056                                          substr($diffinfo->{'to_id'},0,7));
2057                 } else {
2058                         $line .= '0' x 7;
2059                 }
2060
2061         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2062                 # can match only for ordinary diff
2063                 my ($from_link, $to_link);
2064                 if ($from->{'href'}) {
2065                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2066                                              substr($diffinfo->{'from_id'},0,7));
2067                 } else {
2068                         $from_link = '0' x 7;
2069                 }
2070                 if ($to->{'href'}) {
2071                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2072                                            substr($diffinfo->{'to_id'},0,7));
2073                 } else {
2074                         $to_link = '0' x 7;
2075                 }
2076                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2077                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2078         }
2079
2080         return $line . "<br/>\n";
2081 }
2082
2083 # format from-file/to-file diff header
2084 sub format_diff_from_to_header {
2085         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2086         my $line;
2087         my $result = '';
2088
2089         $line = $from_line;
2090         #assert($line =~ m/^---/) if DEBUG;
2091         # no extra formatting for "^--- /dev/null"
2092         if (! $diffinfo->{'nparents'}) {
2093                 # ordinary (single parent) diff
2094                 if ($line =~ m!^--- "?a/!) {
2095                         if ($from->{'href'}) {
2096                                 $line = '--- a/' .
2097                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2098                                                 esc_path($from->{'file'}));
2099                         } else {
2100                                 $line = '--- a/' .
2101                                         esc_path($from->{'file'});
2102                         }
2103                 }
2104                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2105
2106         } else {
2107                 # combined diff (merge commit)
2108                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2109                         if ($from->{'href'}[$i]) {
2110                                 $line = '--- ' .
2111                                         $cgi->a({-href=>href(action=>"blobdiff",
2112                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2113                                                              hash_parent_base=>$parents[$i],
2114                                                              file_parent=>$from->{'file'}[$i],
2115                                                              hash=>$diffinfo->{'to_id'},
2116                                                              hash_base=>$hash,
2117                                                              file_name=>$to->{'file'}),
2118                                                  -class=>"path",
2119                                                  -title=>"diff" . ($i+1)},
2120                                                 $i+1) .
2121                                         '/' .
2122                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2123                                                 esc_path($from->{'file'}[$i]));
2124                         } else {
2125                                 $line = '--- /dev/null';
2126                         }
2127                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2128                 }
2129         }
2130
2131         $line = $to_line;
2132         #assert($line =~ m/^\+\+\+/) if DEBUG;
2133         # no extra formatting for "^+++ /dev/null"
2134         if ($line =~ m!^\+\+\+ "?b/!) {
2135                 if ($to->{'href'}) {
2136                         $line = '+++ b/' .
2137                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2138                                         esc_path($to->{'file'}));
2139                 } else {
2140                         $line = '+++ b/' .
2141                                 esc_path($to->{'file'});
2142                 }
2143         }
2144         $result .= qq!<div class="diff to_file">$line</div>\n!;
2145
2146         return $result;
2147 }
2148
2149 # create note for patch simplified by combined diff
2150 sub format_diff_cc_simplified {
2151         my ($diffinfo, @parents) = @_;
2152         my $result = '';
2153
2154         $result .= "<div class=\"diff header\">" .
2155                    "diff --cc ";
2156         if (!is_deleted($diffinfo)) {
2157                 $result .= $cgi->a({-href => href(action=>"blob",
2158                                                   hash_base=>$hash,
2159                                                   hash=>$diffinfo->{'to_id'},
2160                                                   file_name=>$diffinfo->{'to_file'}),
2161                                     -class => "path"},
2162                                    esc_path($diffinfo->{'to_file'}));
2163         } else {
2164                 $result .= esc_path($diffinfo->{'to_file'});
2165         }
2166         $result .= "</div>\n" . # class="diff header"
2167                    "<div class=\"diff nodifferences\">" .
2168                    "Simple merge" .
2169                    "</div>\n"; # class="diff nodifferences"
2170
2171         return $result;
2172 }
2173
2174 # format patch (diff) line (not to be used for diff headers)
2175 sub format_diff_line {
2176         my $line = shift;
2177         my ($from, $to) = @_;
2178         my $diff_class = "";
2179
2180         chomp $line;
2181
2182         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2183                 # combined diff
2184                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2185                 if ($line =~ m/^\@{3}/) {
2186                         $diff_class = " chunk_header";
2187                 } elsif ($line =~ m/^\\/) {
2188                         $diff_class = " incomplete";
2189                 } elsif ($prefix =~ tr/+/+/) {
2190                         $diff_class = " add";
2191                 } elsif ($prefix =~ tr/-/-/) {
2192                         $diff_class = " rem";
2193                 }
2194         } else {
2195                 # assume ordinary diff
2196                 my $char = substr($line, 0, 1);
2197                 if ($char eq '+') {
2198                         $diff_class = " add";
2199                 } elsif ($char eq '-') {
2200                         $diff_class = " rem";
2201                 } elsif ($char eq '@') {
2202                         $diff_class = " chunk_header";
2203                 } elsif ($char eq "\\") {
2204                         $diff_class = " incomplete";
2205                 }
2206         }
2207         $line = untabify($line);
2208         if ($from && $to && $line =~ m/^\@{2} /) {
2209                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2210                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2211
2212                 $from_lines = 0 unless defined $from_lines;
2213                 $to_lines   = 0 unless defined $to_lines;
2214
2215                 if ($from->{'href'}) {
2216                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2217                                              -class=>"list"}, $from_text);
2218                 }
2219                 if ($to->{'href'}) {
2220                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2221                                              -class=>"list"}, $to_text);
2222                 }
2223                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2224                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2225                 return "<div class=\"diff$diff_class\">$line</div>\n";
2226         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2227                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2228                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2229
2230                 @from_text = split(' ', $ranges);
2231                 for (my $i = 0; $i < @from_text; ++$i) {
2232                         ($from_start[$i], $from_nlines[$i]) =
2233                                 (split(',', substr($from_text[$i], 1)), 0);
2234                 }
2235
2236                 $to_text   = pop @from_text;
2237                 $to_start  = pop @from_start;
2238                 $to_nlines = pop @from_nlines;
2239
2240                 $line = "<span class=\"chunk_info\">$prefix ";
2241                 for (my $i = 0; $i < @from_text; ++$i) {
2242                         if ($from->{'href'}[$i]) {
2243                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2244                                                   -class=>"list"}, $from_text[$i]);
2245                         } else {
2246                                 $line .= $from_text[$i];
2247                         }
2248                         $line .= " ";
2249                 }
2250                 if ($to->{'href'}) {
2251                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2252                                           -class=>"list"}, $to_text);
2253                 } else {
2254                         $line .= $to_text;
2255                 }
2256                 $line .= " $prefix</span>" .
2257                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2258                 return "<div class=\"diff$diff_class\">$line</div>\n";
2259         }
2260         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2261 }
2262
2263 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2264 # linked.  Pass the hash of the tree/commit to snapshot.
2265 sub format_snapshot_links {
2266         my ($hash) = @_;
2267         my $num_fmts = @snapshot_fmts;
2268         if ($num_fmts > 1) {
2269                 # A parenthesized list of links bearing format names.
2270                 # e.g. "snapshot (_tar.gz_ _zip_)"
2271                 return "snapshot (" . join(' ', map
2272                         $cgi->a({
2273                                 -href => href(
2274                                         action=>"snapshot",
2275                                         hash=>$hash,
2276                                         snapshot_format=>$_
2277                                 )
2278                         }, $known_snapshot_formats{$_}{'display'})
2279                 , @snapshot_fmts) . ")";
2280         } elsif ($num_fmts == 1) {
2281                 # A single "snapshot" link whose tooltip bears the format name.
2282                 # i.e. "_snapshot_"
2283                 my ($fmt) = @snapshot_fmts;
2284                 return
2285                         $cgi->a({
2286                                 -href => href(
2287                                         action=>"snapshot",
2288                                         hash=>$hash,
2289                                         snapshot_format=>$fmt
2290                                 ),
2291                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2292                         }, "snapshot");
2293         } else { # $num_fmts == 0
2294                 return undef;
2295         }
2296 }
2297
2298 ## ......................................................................
2299 ## functions returning values to be passed, perhaps after some
2300 ## transformation, to other functions; e.g. returning arguments to href()
2301
2302 # returns hash to be passed to href to generate gitweb URL
2303 # in -title key it returns description of link
2304 sub get_feed_info {
2305         my $format = shift || 'Atom';
2306         my %res = (action => lc($format));
2307
2308         # feed links are possible only for project views
2309         return unless (defined $project);
2310         # some views should link to OPML, or to generic project feed,
2311         # or don't have specific feed yet (so they should use generic)
2312         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2313
2314         my $branch;
2315         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2316         # from tag links; this also makes possible to detect branch links
2317         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2318             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2319                 $branch = $1;
2320         }
2321         # find log type for feed description (title)
2322         my $type = 'log';
2323         if (defined $file_name) {
2324                 $type  = "history of $file_name";
2325                 $type .= "/" if ($action eq 'tree');
2326                 $type .= " on '$branch'" if (defined $branch);
2327         } else {
2328                 $type = "log of $branch" if (defined $branch);
2329         }
2330
2331         $res{-title} = $type;
2332         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2333         $res{'file_name'} = $file_name;
2334
2335         return %res;
2336 }
2337
2338 ## ----------------------------------------------------------------------
2339 ## git utility subroutines, invoking git commands
2340
2341 # returns path to the core git executable and the --git-dir parameter as list
2342 sub git_cmd {
2343         $number_of_git_cmds++;
2344         return $GIT, '--git-dir='.$git_dir;
2345 }
2346
2347 # quote the given arguments for passing them to the shell
2348 # quote_command("command", "arg 1", "arg with ' and ! characters")
2349 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2350 # Try to avoid using this function wherever possible.
2351 sub quote_command {
2352         return join(' ',
2353                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2354 }
2355
2356 # get HEAD ref of given project as hash
2357 sub git_get_head_hash {
2358         return git_get_full_hash(shift, 'HEAD');
2359 }
2360
2361 sub git_get_full_hash {
2362         return git_get_hash(@_);
2363 }
2364
2365 sub git_get_short_hash {
2366         return git_get_hash(@_, '--short=7');
2367 }
2368
2369 sub git_get_hash {
2370         my ($project, $hash, @options) = @_;
2371         my $o_git_dir = $git_dir;
2372         my $retval = undef;
2373         $git_dir = "$projectroot/$project";
2374         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2375             '--verify', '-q', @options, $hash) {
2376                 $retval = <$fd>;
2377                 chomp $retval if defined $retval;
2378                 close $fd;
2379         }
2380         if (defined $o_git_dir) {
2381                 $git_dir = $o_git_dir;
2382         }
2383         return $retval;
2384 }
2385
2386 # get type of given object
2387 sub git_get_type {
2388         my $hash = shift;
2389
2390         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2391         my $type = <$fd>;
2392         close $fd or return;
2393         chomp $type;
2394         return $type;
2395 }
2396
2397 # repository configuration
2398 our $config_file = '';
2399 our %config;
2400
2401 # store multiple values for single key as anonymous array reference
2402 # single values stored directly in the hash, not as [ <value> ]
2403 sub hash_set_multi {
2404         my ($hash, $key, $value) = @_;
2405
2406         if (!exists $hash->{$key}) {
2407                 $hash->{$key} = $value;
2408         } elsif (!ref $hash->{$key}) {
2409                 $hash->{$key} = [ $hash->{$key}, $value ];
2410         } else {
2411                 push @{$hash->{$key}}, $value;
2412         }
2413 }
2414
2415 # return hash of git project configuration
2416 # optionally limited to some section, e.g. 'gitweb'
2417 sub git_parse_project_config {
2418         my $section_regexp = shift;
2419         my %config;
2420
2421         local $/ = "\0";
2422
2423         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2424                 or return;
2425
2426         while (my $keyval = <$fh>) {
2427                 chomp $keyval;
2428                 my ($key, $value) = split(/\n/, $keyval, 2);
2429
2430                 hash_set_multi(\%config, $key, $value)
2431                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2432         }
2433         close $fh;
2434
2435         return %config;
2436 }
2437
2438 # convert config value to boolean: 'true' or 'false'
2439 # no value, number > 0, 'true' and 'yes' values are true
2440 # rest of values are treated as false (never as error)
2441 sub config_to_bool {
2442         my $val = shift;
2443
2444         return 1 if !defined $val;             # section.key
2445
2446         # strip leading and trailing whitespace
2447         $val =~ s/^\s+//;
2448         $val =~ s/\s+$//;
2449
2450         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2451                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2452 }
2453
2454 # convert config value to simple decimal number
2455 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2456 # to be multiplied by 1024, 1048576, or 1073741824
2457 sub config_to_int {
2458         my $val = shift;
2459
2460         # strip leading and trailing whitespace
2461         $val =~ s/^\s+//;
2462         $val =~ s/\s+$//;
2463
2464         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2465                 $unit = lc($unit);
2466                 # unknown unit is treated as 1
2467                 return $num * ($unit eq 'g' ? 1073741824 :
2468                                $unit eq 'm' ?    1048576 :
2469                                $unit eq 'k' ?       1024 : 1);
2470         }
2471         return $val;
2472 }
2473
2474 # convert config value to array reference, if needed
2475 sub config_to_multi {
2476         my $val = shift;
2477
2478         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2479 }
2480
2481 sub git_get_project_config {
2482         my ($key, $type) = @_;
2483
2484         return unless defined $git_dir;
2485
2486         # key sanity check
2487         return unless ($key);
2488         $key =~ s/^gitweb\.//;
2489         return if ($key =~ m/\W/);
2490
2491         # type sanity check
2492         if (defined $type) {
2493                 $type =~ s/^--//;
2494                 $type = undef
2495                         unless ($type eq 'bool' || $type eq 'int');
2496         }
2497
2498         # get config
2499         if (!defined $config_file ||
2500             $config_file ne "$git_dir/config") {
2501                 %config = git_parse_project_config('gitweb');
2502                 $config_file = "$git_dir/config";
2503         }
2504
2505         # check if config variable (key) exists
2506         return unless exists $config{"gitweb.$key"};
2507
2508         # ensure given type
2509         if (!defined $type) {
2510                 return $config{"gitweb.$key"};
2511         } elsif ($type eq 'bool') {
2512                 # backward compatibility: 'git config --bool' returns true/false
2513                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2514         } elsif ($type eq 'int') {
2515                 return config_to_int($config{"gitweb.$key"});
2516         }
2517         return $config{"gitweb.$key"};
2518 }
2519
2520 # get hash of given path at given ref
2521 sub git_get_hash_by_path {
2522         my $base = shift;
2523         my $path = shift || return undef;
2524         my $type = shift;
2525
2526         $path =~ s,/+$,,;
2527
2528         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2529                 or die_error(500, "Open git-ls-tree failed");
2530         my $line = <$fd>;
2531         close $fd or return undef;
2532
2533         if (!defined $line) {
2534                 # there is no tree or hash given by $path at $base
2535                 return undef;
2536         }
2537
2538         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2539         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2540         if (defined $type && $type ne $2) {
2541                 # type doesn't match
2542                 return undef;
2543         }
2544         return $3;
2545 }
2546
2547 # get path of entry with given hash at given tree-ish (ref)
2548 # used to get 'from' filename for combined diff (merge commit) for renames
2549 sub git_get_path_by_hash {
2550         my $base = shift || return;
2551         my $hash = shift || return;
2552
2553         local $/ = "\0";
2554
2555         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2556                 or return undef;
2557         while (my $line = <$fd>) {
2558                 chomp $line;
2559
2560                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2561                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2562                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2563                         close $fd;
2564                         return $1;
2565                 }
2566         }
2567         close $fd;
2568         return undef;
2569 }
2570
2571 ## ......................................................................
2572 ## git utility functions, directly accessing git repository
2573
2574 # get the value of config variable either from file named as the variable
2575 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2576 # configuration variable in the repository config file.
2577 sub git_get_file_or_project_config {
2578         my ($path, $name) = @_;
2579
2580         $git_dir = "$projectroot/$path";
2581         open my $fd, '<', "$git_dir/$name"
2582                 or return git_get_project_config($name);
2583         my $conf = <$fd>;
2584         close $fd;
2585         if (defined $conf) {
2586                 chomp $conf;
2587         }
2588         return $conf;
2589 }
2590
2591 sub git_get_project_description {
2592         my $path = shift;
2593         return git_get_file_or_project_config($path, 'description');
2594 }
2595
2596 sub git_get_project_category {
2597         my $path = shift;
2598         return git_get_file_or_project_config($path, 'category');
2599 }
2600
2601
2602 # supported formats:
2603 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2604 #   - if its contents is a number, use it as tag weight,
2605 #   - otherwise add a tag with weight 1
2606 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2607 #   the same value multiple times increases tag weight
2608 # * `gitweb.ctag' multi-valued repo config variable
2609 sub git_get_project_ctags {
2610         my $project = shift;
2611         my $ctags = {};
2612
2613         $git_dir = "$projectroot/$project";
2614         if (opendir my $dh, "$git_dir/ctags") {
2615                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2616                 foreach my $tagfile (@files) {
2617                         open my $ct, '<', $tagfile
2618                                 or next;
2619                         my $val = <$ct>;
2620                         chomp $val if $val;
2621                         close $ct;
2622
2623                         (my $ctag = $tagfile) =~ s#.*/##;
2624                         if ($val =~ /\d+/) {
2625                                 $ctags->{$ctag} = $val;
2626                         } else {
2627                                 $ctags->{$ctag} = 1;
2628                         }
2629                 }
2630                 closedir $dh;
2631
2632         } elsif (open my $fh, '<', "$git_dir/ctags") {
2633                 while (my $line = <$fh>) {
2634                         chomp $line;
2635                         $ctags->{$line}++ if $line;
2636                 }
2637                 close $fh;
2638
2639         } else {
2640                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2641                 foreach my $tag (@$taglist) {
2642                         $ctags->{$tag}++;
2643                 }
2644         }
2645
2646         return $ctags;
2647 }
2648
2649 # return hash, where keys are content tags ('ctags'),
2650 # and values are sum of weights of given tag in every project
2651 sub git_gather_all_ctags {
2652         my $projects = shift;
2653         my $ctags = {};
2654
2655         foreach my $p (@$projects) {
2656                 foreach my $ct (keys %{$p->{'ctags'}}) {
2657                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2658                 }
2659         }
2660
2661         return $ctags;
2662 }
2663
2664 sub git_populate_project_tagcloud {
2665         my $ctags = shift;
2666
2667         # First, merge different-cased tags; tags vote on casing
2668         my %ctags_lc;
2669         foreach (keys %$ctags) {
2670                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2671                 if (not $ctags_lc{lc $_}->{topcount}
2672                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2673                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2674                         $ctags_lc{lc $_}->{topname} = $_;
2675                 }
2676         }
2677
2678         my $cloud;
2679         my $matched = $cgi->param('by_tag');
2680         if (eval { require HTML::TagCloud; 1; }) {
2681                 $cloud = HTML::TagCloud->new;
2682                 foreach my $ctag (sort keys %ctags_lc) {
2683                         # Pad the title with spaces so that the cloud looks
2684                         # less crammed.
2685                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2686                         $title =~ s/ /&nbsp;/g;
2687                         $title =~ s/^/&nbsp;/g;
2688                         $title =~ s/$/&nbsp;/g;
2689                         if (defined $matched && $matched eq $ctag) {
2690                                 $title = qq(<span class="match">$title</span>);
2691                         }
2692                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2693                                     $ctags_lc{$ctag}->{count});
2694                 }
2695         } else {
2696                 $cloud = {};
2697                 foreach my $ctag (keys %ctags_lc) {
2698                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2699                         if (defined $matched && $matched eq $ctag) {
2700                                 $title = qq(<span class="match">$title</span>);
2701                         }
2702                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2703                         $cloud->{$ctag}{ctag} =
2704                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2705                 }
2706         }
2707         return $cloud;
2708 }
2709
2710 sub git_show_project_tagcloud {
2711         my ($cloud, $count) = @_;
2712         if (ref $cloud eq 'HTML::TagCloud') {
2713                 return $cloud->html_and_css($count);
2714         } else {
2715                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2716                 return
2717                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2718                         join (', ', map {
2719                                 $cloud->{$_}->{'ctag'}
2720                         } splice(@tags, 0, $count)) .
2721                         '</div>';
2722         }
2723 }
2724
2725 sub git_get_project_url_list {
2726         my $path = shift;
2727
2728         $git_dir = "$projectroot/$path";
2729         open my $fd, '<', "$git_dir/cloneurl"
2730                 or return wantarray ?
2731                 @{ config_to_multi(git_get_project_config('url')) } :
2732                    config_to_multi(git_get_project_config('url'));
2733         my @git_project_url_list = map { chomp; $_ } <$fd>;
2734         close $fd;
2735
2736         return wantarray ? @git_project_url_list : \@git_project_url_list;
2737 }
2738
2739 sub git_get_projects_list {
2740         my $filter = shift || '';
2741         my @list;
2742
2743         $filter =~ s/\.git$//;
2744
2745         if (-d $projects_list) {
2746                 # search in directory
2747                 my $dir = $projects_list;
2748                 # remove the trailing "/"
2749                 $dir =~ s!/+$!!;
2750                 my $pfxlen = length("$projects_list");
2751                 my $pfxdepth = ($projects_list =~ tr!/!!);
2752                 # when filtering, search only given subdirectory
2753                 if ($filter) {
2754                         $dir .= "/$filter";
2755                         $dir =~ s!/+$!!;
2756                 }
2757
2758                 File::Find::find({
2759                         follow_fast => 1, # follow symbolic links
2760                         follow_skip => 2, # ignore duplicates
2761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2762                         wanted => sub {
2763                                 # global variables
2764                                 our $project_maxdepth;
2765                                 our $projectroot;
2766                                 # skip project-list toplevel, if we get it.
2767                                 return if (m!^[/.]$!);
2768                                 # only directories can be git repositories
2769                                 return unless (-d $_);
2770                                 # don't traverse too deep (Find is super slow on os x)
2771                                 # $project_maxdepth excludes depth of $projectroot
2772                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2773                                         $File::Find::prune = 1;
2774                                         return;
2775                                 }
2776
2777                                 my $path = substr($File::Find::name, $pfxlen + 1);
2778                                 # we check related file in $projectroot
2779                                 if (check_export_ok("$projectroot/$path")) {
2780                                         push @list, { path => $path };
2781                                         $File::Find::prune = 1;
2782                                 }
2783                         },
2784                 }, "$dir");
2785
2786         } elsif (-f $projects_list) {
2787                 # read from file(url-encoded):
2788                 # 'git%2Fgit.git Linus+Torvalds'
2789                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2790                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2791                 open my $fd, '<', $projects_list or return;
2792         PROJECT:
2793                 while (my $line = <$fd>) {
2794                         chomp $line;
2795                         my ($path, $owner) = split ' ', $line;
2796                         $path = unescape($path);
2797                         $owner = unescape($owner);
2798                         if (!defined $path) {
2799                                 next;
2800                         }
2801                         # if $filter is rpovided, check if $path begins with $filter
2802                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2803                                 next;
2804                         }
2805                         if (check_export_ok("$projectroot/$path")) {
2806                                 my $pr = {
2807                                         path => $path,
2808                                         owner => to_utf8($owner),
2809                                 };
2810                                 push @list, $pr;
2811                         }
2812                 }
2813                 close $fd;
2814         }
2815         return @list;
2816 }
2817
2818 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2819 # as side effects it sets 'forks' field to list of forks for forked projects
2820 sub filter_forks_from_projects_list {
2821         my $projects = shift;
2822
2823         my %trie; # prefix tree of directories (path components)
2824         # generate trie out of those directories that might contain forks
2825         foreach my $pr (@$projects) {
2826                 my $path = $pr->{'path'};
2827                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2828                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2829                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2830                 next unless (-d $path);   # containing directory exists
2831                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2832
2833                 # add to trie
2834                 my @dirs = split('/', $path);
2835                 # walk the trie, until either runs out of components or out of trie
2836                 my $ref = \%trie;
2837                 while (scalar @dirs &&
2838                        exists($ref->{$dirs[0]})) {
2839                         $ref = $ref->{shift @dirs};
2840                 }
2841                 # create rest of trie structure from rest of components
2842                 foreach my $dir (@dirs) {
2843                         $ref = $ref->{$dir} = {};
2844                 }
2845                 # create end marker, store $pr as a data
2846                 $ref->{''} = $pr if (!exists $ref->{''});
2847         }
2848
2849         # filter out forks, by finding shortest prefix match for paths
2850         my @filtered;
2851  PROJECT:
2852         foreach my $pr (@$projects) {
2853                 # trie lookup
2854                 my $ref = \%trie;
2855         DIR:
2856                 foreach my $dir (split('/', $pr->{'path'})) {
2857                         if (exists $ref->{''}) {
2858                                 # found [shortest] prefix, is a fork - skip it
2859                                 push @{$ref->{''}{'forks'}}, $pr;
2860                                 next PROJECT;
2861                         }
2862                         if (!exists $ref->{$dir}) {
2863                                 # not in trie, cannot have prefix, not a fork
2864                                 push @filtered, $pr;
2865                                 next PROJECT;
2866                         }
2867                         # If the dir is there, we just walk one step down the trie.
2868                         $ref = $ref->{$dir};
2869                 }
2870                 # we ran out of trie
2871                 # (shouldn't happen: it's either no match, or end marker)
2872                 push @filtered, $pr;
2873         }
2874
2875         return @filtered;
2876 }
2877
2878 # note: fill_project_list_info must be run first,
2879 # for 'descr_long' and 'ctags' to be filled
2880 sub search_projects_list {
2881         my ($projlist, %opts) = @_;
2882         my $tagfilter  = $opts{'tagfilter'};
2883         my $searchtext = $opts{'searchtext'};
2884
2885         return @$projlist
2886                 unless ($tagfilter || $searchtext);
2887
2888         my @projects;
2889  PROJECT:
2890         foreach my $pr (@$projlist) {
2891
2892                 if ($tagfilter) {
2893                         next unless ref($pr->{'ctags'}) eq 'HASH';
2894                         next unless
2895                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2896                 }
2897
2898                 if ($searchtext) {
2899                         next unless
2900                                 $pr->{'path'} =~ /$searchtext/ ||
2901                                 $pr->{'descr_long'} =~ /$searchtext/;
2902                 }
2903
2904                 push @projects, $pr;
2905         }
2906
2907         return @projects;
2908 }
2909
2910 our $gitweb_project_owner = undef;
2911 sub git_get_project_list_from_file {
2912
2913         return if (defined $gitweb_project_owner);
2914
2915         $gitweb_project_owner = {};
2916         # read from file (url-encoded):
2917         # 'git%2Fgit.git Linus+Torvalds'
2918         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2919         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2920         if (-f $projects_list) {
2921                 open(my $fd, '<', $projects_list);
2922                 while (my $line = <$fd>) {
2923                         chomp $line;
2924                         my ($pr, $ow) = split ' ', $line;
2925                         $pr = unescape($pr);
2926                         $ow = unescape($ow);
2927                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2928                 }
2929                 close $fd;
2930         }
2931 }
2932
2933 sub git_get_project_owner {
2934         my $project = shift;
2935         my $owner;
2936
2937         return undef unless $project;
2938         $git_dir = "$projectroot/$project";
2939
2940         if (!defined $gitweb_project_owner) {
2941                 git_get_project_list_from_file();
2942         }
2943
2944         if (exists $gitweb_project_owner->{$project}) {
2945                 $owner = $gitweb_project_owner->{$project};
2946         }
2947         if (!defined $owner){
2948                 $owner = git_get_project_config('owner');
2949         }
2950         if (!defined $owner) {
2951                 $owner = get_file_owner("$git_dir");
2952         }
2953
2954         return $owner;
2955 }
2956
2957 sub git_get_last_activity {
2958         my ($path) = @_;
2959         my $fd;
2960
2961         $git_dir = "$projectroot/$path";
2962         open($fd, "-|", git_cmd(), 'for-each-ref',
2963              '--format=%(committer)',
2964              '--sort=-committerdate',
2965              '--count=1',
2966              'refs/heads') or return;
2967         my $most_recent = <$fd>;
2968         close $fd or return;
2969         if (defined $most_recent &&
2970             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2971                 my $timestamp = $1;
2972                 my $age = time - $timestamp;
2973                 return ($age, age_string($age));
2974         }
2975         return (undef, undef);
2976 }
2977
2978 # Implementation note: when a single remote is wanted, we cannot use 'git
2979 # remote show -n' because that command always work (assuming it's a remote URL
2980 # if it's not defined), and we cannot use 'git remote show' because that would
2981 # try to make a network roundtrip. So the only way to find if that particular
2982 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2983 # and when we find what we want.
2984 sub git_get_remotes_list {
2985         my $wanted = shift;
2986         my %remotes = ();
2987
2988         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2989         return unless $fd;
2990         while (my $remote = <$fd>) {
2991                 chomp $remote;
2992                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2993                 next if $wanted and not $remote eq $wanted;
2994                 my ($url, $key) = ($1, $2);
2995
2996                 $remotes{$remote} ||= { 'heads' => () };
2997                 $remotes{$remote}{$key} = $url;
2998         }
2999         close $fd or return;
3000         return wantarray ? %remotes : \%remotes;
3001 }
3002
3003 # Takes a hash of remotes as first parameter and fills it by adding the
3004 # available remote heads for each of the indicated remotes.
3005 sub fill_remote_heads {
3006         my $remotes = shift;
3007         my @heads = map { "remotes/$_" } keys %$remotes;
3008         my @remoteheads = git_get_heads_list(undef, @heads);
3009         foreach my $remote (keys %$remotes) {
3010                 $remotes->{$remote}{'heads'} = [ grep {
3011                         $_->{'name'} =~ s!^$remote/!!
3012                         } @remoteheads ];
3013         }
3014 }
3015
3016 sub git_get_references {
3017         my $type = shift || "";
3018         my %refs;
3019         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3020         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3021         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3022                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3023                 or return;
3024
3025         while (my $line = <$fd>) {
3026                 chomp $line;
3027                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3028                         if (defined $refs{$1}) {
3029                                 push @{$refs{$1}}, $2;
3030                         } else {
3031                                 $refs{$1} = [ $2 ];
3032                         }
3033                 }
3034         }
3035         close $fd or return;
3036         return \%refs;
3037 }
3038
3039 sub git_get_rev_name_tags {
3040         my $hash = shift || return undef;
3041
3042         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3043                 or return;
3044         my $name_rev = <$fd>;
3045         close $fd;
3046
3047         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3048                 return $1;
3049         } else {
3050                 # catches also '$hash undefined' output
3051                 return undef;
3052         }
3053 }
3054
3055 ## ----------------------------------------------------------------------
3056 ## parse to hash functions
3057
3058 sub parse_date {
3059         my $epoch = shift;
3060         my $tz = shift || "-0000";
3061
3062         my %date;
3063         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3064         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3065         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3066         $date{'hour'} = $hour;
3067         $date{'minute'} = $min;
3068         $date{'mday'} = $mday;
3069         $date{'day'} = $days[$wday];
3070         $date{'month'} = $months[$mon];
3071         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3072                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3073         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3074                              $mday, $months[$mon], $hour ,$min;
3075         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3076                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3077
3078         my ($tz_sign, $tz_hour, $tz_min) =
3079                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3080         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3081         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3082         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3083         $date{'hour_local'} = $hour;
3084         $date{'minute_local'} = $min;
3085         $date{'tz_local'} = $tz;
3086         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3087                                   1900+$year, $mon+1, $mday,
3088                                   $hour, $min, $sec, $tz);
3089         return %date;
3090 }
3091
3092 sub parse_tag {
3093         my $tag_id = shift;
3094         my %tag;
3095         my @comment;
3096
3097         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3098         $tag{'id'} = $tag_id;
3099         while (my $line = <$fd>) {
3100                 chomp $line;
3101                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3102                         $tag{'object'} = $1;
3103                 } elsif ($line =~ m/^type (.+)$/) {
3104                         $tag{'type'} = $1;
3105                 } elsif ($line =~ m/^tag (.+)$/) {
3106                         $tag{'name'} = $1;
3107                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3108                         $tag{'author'} = $1;
3109                         $tag{'author_epoch'} = $2;
3110                         $tag{'author_tz'} = $3;
3111                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3112                                 $tag{'author_name'}  = $1;
3113                                 $tag{'author_email'} = $2;
3114                         } else {
3115                                 $tag{'author_name'} = $tag{'author'};
3116                         }
3117                 } elsif ($line =~ m/--BEGIN/) {
3118                         push @comment, $line;
3119                         last;
3120                 } elsif ($line eq "") {
3121                         last;
3122                 }
3123         }
3124         push @comment, <$fd>;
3125         $tag{'comment'} = \@comment;
3126         close $fd or return;
3127         if (!defined $tag{'name'}) {
3128                 return
3129         };
3130         return %tag
3131 }
3132
3133 sub parse_commit_text {
3134         my ($commit_text, $withparents) = @_;
3135         my @commit_lines = split '\n', $commit_text;
3136         my %co;
3137
3138         pop @commit_lines; # Remove '\0'
3139
3140         if (! @commit_lines) {
3141                 return;
3142         }
3143
3144         my $header = shift @commit_lines;
3145         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3146                 return;
3147         }
3148         ($co{'id'}, my @parents) = split ' ', $header;
3149         while (my $line = shift @commit_lines) {
3150                 last if $line eq "\n";
3151                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3152                         $co{'tree'} = $1;
3153                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3154                         push @parents, $1;
3155                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3156                         $co{'author'} = to_utf8($1);
3157                         $co{'author_epoch'} = $2;
3158                         $co{'author_tz'} = $3;
3159                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3160                                 $co{'author_name'}  = $1;
3161                                 $co{'author_email'} = $2;
3162                         } else {
3163                                 $co{'author_name'} = $co{'author'};
3164                         }
3165                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3166                         $co{'committer'} = to_utf8($1);
3167                         $co{'committer_epoch'} = $2;
3168                         $co{'committer_tz'} = $3;
3169                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3170                                 $co{'committer_name'}  = $1;
3171                                 $co{'committer_email'} = $2;
3172                         } else {
3173                                 $co{'committer_name'} = $co{'committer'};
3174                         }
3175                 }
3176         }
3177         if (!defined $co{'tree'}) {
3178                 return;
3179         };
3180         $co{'parents'} = \@parents;
3181         $co{'parent'} = $parents[0];
3182
3183         foreach my $title (@commit_lines) {
3184                 $title =~ s/^    //;
3185                 if ($title ne "") {
3186                         $co{'title'} = chop_str($title, 80, 5);
3187                         # remove leading stuff of merges to make the interesting part visible
3188                         if (length($title) > 50) {
3189                                 $title =~ s/^Automatic //;
3190                                 $title =~ s/^merge (of|with) /Merge ... /i;
3191                                 if (length($title) > 50) {
3192                                         $title =~ s/(http|rsync):\/\///;
3193                                 }
3194                                 if (length($title) > 50) {
3195                                         $title =~ s/(master|www|rsync)\.//;
3196                                 }
3197                                 if (length($title) > 50) {
3198                                         $title =~ s/kernel.org:?//;
3199                                 }
3200                                 if (length($title) > 50) {
3201                                         $title =~ s/\/pub\/scm//;
3202                                 }
3203                         }
3204                         $co{'title_short'} = chop_str($title, 50, 5);
3205                         last;
3206                 }
3207         }
3208         if (! defined $co{'title'} || $co{'title'} eq "") {
3209                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3210         }
3211         # remove added spaces
3212         foreach my $line (@commit_lines) {
3213                 $line =~ s/^    //;
3214         }
3215         $co{'comment'} = \@commit_lines;
3216
3217         my $age = time - $co{'committer_epoch'};
3218         $co{'age'} = $age;
3219         $co{'age_string'} = age_string($age);
3220         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3221         if ($age > 60*60*24*7*2) {
3222                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3223                 $co{'age_string_age'} = $co{'age_string'};
3224         } else {
3225                 $co{'age_string_date'} = $co{'age_string'};
3226                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3227         }
3228         return %co;
3229 }
3230
3231 sub parse_commit {
3232         my ($commit_id) = @_;
3233         my %co;
3234
3235         local $/ = "\0";
3236
3237         open my $fd, "-|", git_cmd(), "rev-list",
3238                 "--parents",
3239                 "--header",
3240                 "--max-count=1",
3241                 $commit_id,
3242                 "--",
3243                 or die_error(500, "Open git-rev-list failed");
3244         %co = parse_commit_text(<$fd>, 1);
3245         close $fd;
3246
3247         return %co;
3248 }
3249
3250 sub parse_commits {
3251         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3252         my @cos;
3253
3254         $maxcount ||= 1;
3255         $skip ||= 0;
3256
3257         local $/ = "\0";
3258
3259         open my $fd, "-|", git_cmd(), "rev-list",
3260                 "--header",
3261                 @args,
3262                 ("--max-count=" . $maxcount),
3263                 ("--skip=" . $skip),
3264                 @extra_options,
3265                 $commit_id,
3266                 "--",
3267                 ($filename ? ($filename) : ())
3268                 or die_error(500, "Open git-rev-list failed");
3269         while (my $line = <$fd>) {
3270                 my %co = parse_commit_text($line);
3271                 push @cos, \%co;
3272         }
3273         close $fd;
3274
3275         return wantarray ? @cos : \@cos;
3276 }
3277
3278 # parse line of git-diff-tree "raw" output
3279 sub parse_difftree_raw_line {
3280         my $line = shift;
3281         my %res;
3282
3283         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3284         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3285         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3286                 $res{'from_mode'} = $1;
3287                 $res{'to_mode'} = $2;
3288                 $res{'from_id'} = $3;
3289                 $res{'to_id'} = $4;
3290                 $res{'status'} = $5;
3291                 $res{'similarity'} = $6;
3292                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3293                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3294                 } else {
3295                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3296                 }
3297         }
3298         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3299         # combined diff (for merge commit)
3300         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3301                 $res{'nparents'}  = length($1);
3302                 $res{'from_mode'} = [ split(' ', $2) ];
3303                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3304                 $res{'from_id'} = [ split(' ', $3) ];
3305                 $res{'to_id'} = pop @{$res{'from_id'}};
3306                 $res{'status'} = [ split('', $4) ];
3307                 $res{'to_file'} = unquote($5);
3308         }
3309         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3310         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3311                 $res{'commit'} = $1;
3312         }
3313
3314         return wantarray ? %res : \%res;
3315 }
3316
3317 # wrapper: return parsed line of git-diff-tree "raw" output
3318 # (the argument might be raw line, or parsed info)
3319 sub parsed_difftree_line {
3320         my $line_or_ref = shift;
3321
3322         if (ref($line_or_ref) eq "HASH") {
3323                 # pre-parsed (or generated by hand)
3324                 return $line_or_ref;
3325         } else {
3326                 return parse_difftree_raw_line($line_or_ref);
3327         }
3328 }
3329
3330 # parse line of git-ls-tree output
3331 sub parse_ls_tree_line {
3332         my $line = shift;
3333         my %opts = @_;
3334         my %res;
3335
3336         if ($opts{'-l'}) {
3337                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3338                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3339
3340                 $res{'mode'} = $1;
3341                 $res{'type'} = $2;
3342                 $res{'hash'} = $3;
3343                 $res{'size'} = $4;
3344                 if ($opts{'-z'}) {
3345                         $res{'name'} = $5;
3346                 } else {
3347                         $res{'name'} = unquote($5);
3348                 }
3349         } else {
3350                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3351                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3352
3353                 $res{'mode'} = $1;
3354                 $res{'type'} = $2;
3355                 $res{'hash'} = $3;
3356                 if ($opts{'-z'}) {
3357                         $res{'name'} = $4;
3358                 } else {
3359                         $res{'name'} = unquote($4);
3360                 }
3361         }
3362
3363         return wantarray ? %res : \%res;
3364 }
3365
3366 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3367 sub parse_from_to_diffinfo {
3368         my ($diffinfo, $from, $to, @parents) = @_;
3369
3370         if ($diffinfo->{'nparents'}) {
3371                 # combined diff
3372                 $from->{'file'} = [];
3373                 $from->{'href'} = [];
3374                 fill_from_file_info($diffinfo, @parents)
3375                         unless exists $diffinfo->{'from_file'};
3376                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3377                         $from->{'file'}[$i] =
3378                                 defined $diffinfo->{'from_file'}[$i] ?
3379                                         $diffinfo->{'from_file'}[$i] :
3380                                         $diffinfo->{'to_file'};
3381                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3382                                 $from->{'href'}[$i] = href(action=>"blob",
3383                                                            hash_base=>$parents[$i],
3384                                                            hash=>$diffinfo->{'from_id'}[$i],
3385                                                            file_name=>$from->{'file'}[$i]);
3386                         } else {
3387                                 $from->{'href'}[$i] = undef;
3388                         }
3389                 }
3390         } else {
3391                 # ordinary (not combined) diff
3392                 $from->{'file'} = $diffinfo->{'from_file'};
3393                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3394                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3395                                                hash=>$diffinfo->{'from_id'},
3396                                                file_name=>$from->{'file'});
3397                 } else {
3398                         delete $from->{'href'};
3399                 }
3400         }
3401
3402         $to->{'file'} = $diffinfo->{'to_file'};
3403         if (!is_deleted($diffinfo)) { # file exists in result
3404                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3405                                      hash=>$diffinfo->{'to_id'},
3406                                      file_name=>$to->{'file'});
3407         } else {
3408                 delete $to->{'href'};
3409         }
3410 }
3411
3412 ## ......................................................................
3413 ## parse to array of hashes functions
3414
3415 sub git_get_heads_list {
3416         my ($limit, @classes) = @_;
3417         @classes = ('heads') unless @classes;
3418         my @patterns = map { "refs/$_" } @classes;
3419         my @headslist;
3420
3421         open my $fd, '-|', git_cmd(), 'for-each-ref',
3422                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3423                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3424                 @patterns
3425                 or return;
3426         while (my $line = <$fd>) {
3427                 my %ref_item;
3428
3429                 chomp $line;
3430                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3431                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3432                 my ($committer, $epoch, $tz) =
3433                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3434                 $ref_item{'fullname'}  = $name;
3435                 $name =~ s!^refs/(?:head|remote)s/!!;
3436
3437                 $ref_item{'name'}  = $name;
3438                 $ref_item{'id'}    = $hash;
3439                 $ref_item{'title'} = $title || '(no commit message)';
3440                 $ref_item{'epoch'} = $epoch;
3441                 if ($epoch) {
3442                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3443                 } else {
3444                         $ref_item{'age'} = "unknown";
3445                 }
3446
3447                 push @headslist, \%ref_item;
3448         }
3449         close $fd;
3450
3451         return wantarray ? @headslist : \@headslist;
3452 }
3453
3454 sub git_get_tags_list {
3455         my $limit = shift;
3456         my @tagslist;
3457
3458         open my $fd, '-|', git_cmd(), 'for-each-ref',
3459                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3460                 '--format=%(objectname) %(objecttype) %(refname) '.
3461                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3462                 'refs/tags'
3463                 or return;
3464         while (my $line = <$fd>) {
3465                 my %ref_item;
3466
3467                 chomp $line;
3468                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3469                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3470                 my ($creator, $epoch, $tz) =
3471                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3472                 $ref_item{'fullname'} = $name;
3473                 $name =~ s!^refs/tags/!!;
3474
3475                 $ref_item{'type'} = $type;
3476                 $ref_item{'id'} = $id;
3477                 $ref_item{'name'} = $name;
3478                 if ($type eq "tag") {
3479                         $ref_item{'subject'} = $title;
3480                         $ref_item{'reftype'} = $reftype;
3481                         $ref_item{'refid'}   = $refid;
3482                 } else {
3483                         $ref_item{'reftype'} = $type;
3484                         $ref_item{'refid'}   = $id;
3485                 }
3486
3487                 if ($type eq "tag" || $type eq "commit") {
3488                         $ref_item{'epoch'} = $epoch;
3489                         if ($epoch) {
3490                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3491                         } else {
3492                                 $ref_item{'age'} = "unknown";
3493                         }
3494                 }
3495
3496                 push @tagslist, \%ref_item;
3497         }
3498         close $fd;
3499
3500         return wantarray ? @tagslist : \@tagslist;
3501 }
3502
3503 ## ----------------------------------------------------------------------
3504 ## filesystem-related functions
3505
3506 sub get_file_owner {
3507         my $path = shift;
3508
3509         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3510         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3511         if (!defined $gcos) {
3512                 return undef;
3513         }
3514         my $owner = $gcos;
3515         $owner =~ s/[,;].*$//;
3516         return to_utf8($owner);
3517 }
3518
3519 # assume that file exists
3520 sub insert_file {
3521         my $filename = shift;
3522
3523         open my $fd, '<', $filename;
3524         print map { to_utf8($_) } <$fd>;
3525         close $fd;
3526 }
3527
3528 ## ......................................................................
3529 ## mimetype related functions
3530
3531 sub mimetype_guess_file {
3532         my $filename = shift;
3533         my $mimemap = shift;
3534         -r $mimemap or return undef;
3535
3536         my %mimemap;
3537         open(my $mh, '<', $mimemap) or return undef;
3538         while (<$mh>) {
3539                 next if m/^#/; # skip comments
3540                 my ($mimetype, $exts) = split(/\t+/);
3541                 if (defined $exts) {
3542                         my @exts = split(/\s+/, $exts);
3543                         foreach my $ext (@exts) {
3544                                 $mimemap{$ext} = $mimetype;
3545                         }
3546                 }
3547         }
3548         close($mh);
3549
3550         $filename =~ /\.([^.]*)$/;
3551         return $mimemap{$1};
3552 }
3553
3554 sub mimetype_guess {
3555         my $filename = shift;
3556         my $mime;
3557         $filename =~ /\./ or return undef;
3558
3559         if ($mimetypes_file) {
3560                 my $file = $mimetypes_file;
3561                 if ($file !~ m!^/!) { # if it is relative path
3562                         # it is relative to project
3563                         $file = "$projectroot/$project/$file";
3564                 }
3565                 $mime = mimetype_guess_file($filename, $file);
3566         }
3567         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3568         return $mime;
3569 }
3570
3571 sub blob_mimetype {
3572         my $fd = shift;
3573         my $filename = shift;
3574
3575         if ($filename) {
3576                 my $mime = mimetype_guess($filename);
3577                 $mime and return $mime;
3578         }
3579
3580         # just in case
3581         return $default_blob_plain_mimetype unless $fd;
3582
3583         if (-T $fd) {
3584                 return 'text/plain';
3585         } elsif (! $filename) {
3586                 return 'application/octet-stream';
3587         } elsif ($filename =~ m/\.png$/i) {
3588                 return 'image/png';
3589         } elsif ($filename =~ m/\.gif$/i) {
3590                 return 'image/gif';
3591         } elsif ($filename =~ m/\.jpe?g$/i) {
3592                 return 'image/jpeg';
3593         } else {
3594                 return 'application/octet-stream';
3595         }
3596 }
3597
3598 sub blob_contenttype {
3599         my ($fd, $file_name, $type) = @_;
3600
3601         $type ||= blob_mimetype($fd, $file_name);
3602         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3603                 $type .= "; charset=$default_text_plain_charset";
3604         }
3605
3606         return $type;
3607 }
3608
3609 # guess file syntax for syntax highlighting; return undef if no highlighting
3610 # the name of syntax can (in the future) depend on syntax highlighter used
3611 sub guess_file_syntax {
3612         my ($highlight, $mimetype, $file_name) = @_;
3613         return undef unless ($highlight && defined $file_name);
3614         my $basename = basename($file_name, '.in');
3615         return $highlight_basename{$basename}
3616                 if exists $highlight_basename{$basename};
3617
3618         $basename =~ /\.([^.]*)$/;
3619         my $ext = $1 or return undef;
3620         return $highlight_ext{$ext}
3621                 if exists $highlight_ext{$ext};
3622
3623         return undef;
3624 }
3625
3626 # run highlighter and return FD of its output,
3627 # or return original FD if no highlighting
3628 sub run_highlighter {
3629         my ($fd, $highlight, $syntax) = @_;
3630         return $fd unless ($highlight && defined $syntax);
3631
3632         close $fd;
3633         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3634                   quote_command($highlight_bin).
3635                   " --replace-tabs=8 --fragment --syntax $syntax |"
3636                 or die_error(500, "Couldn't open file or run syntax highlighter");
3637         return $fd;
3638 }
3639
3640 ## ======================================================================
3641 ## functions printing HTML: header, footer, error page
3642
3643 sub get_page_title {
3644         my $title = to_utf8($site_name);
3645
3646         return $title unless (defined $project);
3647         $title .= " - " . to_utf8($project);
3648
3649         return $title unless (defined $action);
3650         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3651
3652         return $title unless (defined $file_name);
3653         $title .= " - " . esc_path($file_name);
3654         if ($action eq "tree" && $file_name !~ m|/$|) {
3655                 $title .= "/";
3656         }
3657
3658         return $title;
3659 }
3660
3661 sub print_feed_meta {
3662         if (defined $project) {
3663                 my %href_params = get_feed_info();
3664                 if (!exists $href_params{'-title'}) {
3665                         $href_params{'-title'} = 'log';
3666                 }
3667
3668                 foreach my $format (qw(RSS Atom)) {
3669                         my $type = lc($format);
3670                         my %link_attr = (
3671                                 '-rel' => 'alternate',
3672                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3673                                 '-type' => "application/$type+xml"
3674                         );
3675
3676                         $href_params{'action'} = $type;
3677                         $link_attr{'-href'} = href(%href_params);
3678                         print "<link ".
3679                               "rel=\"$link_attr{'-rel'}\" ".
3680                               "title=\"$link_attr{'-title'}\" ".
3681                               "href=\"$link_attr{'-href'}\" ".
3682                               "type=\"$link_attr{'-type'}\" ".
3683                               "/>\n";
3684
3685                         $href_params{'extra_options'} = '--no-merges';
3686                         $link_attr{'-href'} = href(%href_params);
3687                         $link_attr{'-title'} .= ' (no merges)';
3688                         print "<link ".
3689                               "rel=\"$link_attr{'-rel'}\" ".
3690                               "title=\"$link_attr{'-title'}\" ".
3691                               "href=\"$link_attr{'-href'}\" ".
3692                               "type=\"$link_attr{'-type'}\" ".
3693                               "/>\n";
3694                 }
3695
3696         } else {
3697                 printf('<link rel="alternate" title="%s projects list" '.
3698                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3699                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3700                 printf('<link rel="alternate" title="%s projects feeds" '.
3701                        'href="%s" type="text/x-opml" />'."\n",
3702                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3703         }
3704 }
3705
3706 sub git_header_html {
3707         my $status = shift || "200 OK";
3708         my $expires = shift;
3709         my %opts = @_;
3710
3711         my $title = get_page_title();
3712         my $content_type;
3713         # require explicit support from the UA if we are to send the page as
3714         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3715         # we have to do this because MSIE sometimes globs '*/*', pretending to
3716         # support xhtml+xml but choking when it gets what it asked for.
3717         if (defined $cgi->http('HTTP_ACCEPT') &&
3718             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3719             $cgi->Accept('application/xhtml+xml') != 0) {
3720                 $content_type = 'application/xhtml+xml';
3721         } else {
3722                 $content_type = 'text/html';
3723         }
3724         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3725                            -status=> $status, -expires => $expires)
3726                 unless ($opts{'-no_http_header'});
3727         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3728         print <<EOF;
3729 <?xml version="1.0" encoding="utf-8"?>
3730 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3731 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3732 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3733 <!-- git core binaries version $git_version -->
3734 <head>
3735 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3736 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3737 <meta name="robots" content="index, nofollow"/>
3738 <title>$title</title>
3739 EOF
3740         # the stylesheet, favicon etc urls won't work correctly with path_info
3741         # unless we set the appropriate base URL
3742         if ($ENV{'PATH_INFO'}) {
3743                 print "<base href=\"".esc_url($base_url)."\" />\n";
3744         }
3745         # print out each stylesheet that exist, providing backwards capability
3746         # for those people who defined $stylesheet in a config file
3747         if (defined $stylesheet) {
3748                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3749         } else {
3750                 foreach my $stylesheet (@stylesheets) {
3751                         next unless $stylesheet;
3752                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3753                 }
3754         }
3755         print_feed_meta()
3756                 if ($status eq '200 OK');
3757         if (defined $favicon) {
3758                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3759         }
3760
3761         print "</head>\n" .
3762               "<body>\n";
3763
3764         if (defined $site_header && -f $site_header) {
3765                 insert_file($site_header);
3766         }
3767
3768         print "<div class=\"page_header\">\n";
3769         if (defined $logo) {
3770                 print $cgi->a({-href => esc_url($logo_url),
3771                                -title => $logo_label},
3772                               $cgi->img({-src => esc_url($logo),
3773                                          -width => 72, -height => 27,
3774                                          -alt => "git",
3775                                          -class => "logo"}));
3776         }
3777         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3778         if (defined $project) {
3779                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3780                 if (defined $action) {
3781                         my $action_print = $action ;
3782                         if (defined $opts{-action_extra}) {
3783                                 $action_print = $cgi->a({-href => href(action=>$action)},
3784                                         $action);
3785                         }
3786                         print " / $action_print";
3787                 }
3788                 if (defined $opts{-action_extra}) {
3789                         print " / $opts{-action_extra}";
3790                 }
3791                 print "\n";
3792         }
3793         print "</div>\n";
3794
3795         my $have_search = gitweb_check_feature('search');
3796         if (defined $project && $have_search) {
3797                 if (!defined $searchtext) {
3798                         $searchtext = "";
3799                 }
3800                 my $search_hash;
3801                 if (defined $hash_base) {
3802                         $search_hash = $hash_base;
3803                 } elsif (defined $hash) {
3804                         $search_hash = $hash;
3805                 } else {
3806                         $search_hash = "HEAD";
3807                 }
3808                 my $action = $my_uri;
3809                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3810                 if ($use_pathinfo) {
3811                         $action .= "/".esc_url($project);
3812                 }
3813                 print $cgi->startform(-method => "get", -action => $action) .
3814                       "<div class=\"search\">\n" .
3815                       (!$use_pathinfo &&
3816                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3817                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3818                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3819                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3820                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3821                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3822                       " search:\n",
3823                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3824                       "<span title=\"Extended regular expression\">" .
3825                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3826                                      -checked => $search_use_regexp) .
3827                       "</span>" .
3828                       "</div>" .
3829                       $cgi->end_form() . "\n";
3830         }
3831 }
3832
3833 sub git_footer_html {
3834         my $feed_class = 'rss_logo';
3835
3836         print "<div class=\"page_footer\">\n";
3837         if (defined $project) {
3838                 my $descr = git_get_project_description($project);
3839                 if (defined $descr) {
3840                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3841                 }
3842
3843                 my %href_params = get_feed_info();
3844                 if (!%href_params) {
3845                         $feed_class .= ' generic';
3846                 }
3847                 $href_params{'-title'} ||= 'log';
3848
3849                 foreach my $format (qw(RSS Atom)) {
3850                         $href_params{'action'} = lc($format);
3851                         print $cgi->a({-href => href(%href_params),
3852                                       -title => "$href_params{'-title'} $format feed",
3853                                       -class => $feed_class}, $format)."\n";
3854                 }
3855
3856         } else {
3857                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3858                               -class => $feed_class}, "OPML") . " ";
3859                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3860                               -class => $feed_class}, "TXT") . "\n";
3861         }
3862         print "</div>\n"; # class="page_footer"
3863
3864         if (defined $t0 && gitweb_check_feature('timed')) {
3865                 print "<div id=\"generating_info\">\n";
3866                 print 'This page took '.
3867                       '<span id="generating_time" class="time_span">'.
3868                       tv_interval($t0, [ gettimeofday() ]).
3869                       ' seconds </span>'.
3870                       ' and '.
3871                       '<span id="generating_cmd">'.
3872                       $number_of_git_cmds.
3873                       '</span> git commands '.
3874                       " to generate.\n";
3875                 print "</div>\n"; # class="page_footer"
3876         }
3877
3878         if (defined $site_footer && -f $site_footer) {
3879                 insert_file($site_footer);
3880         }
3881
3882         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3883         if (defined $action &&
3884             $action eq 'blame_incremental') {
3885                 print qq!<script type="text/javascript">\n!.
3886                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3887                       qq!           "!. href() .qq!");\n!.
3888                       qq!</script>\n!;
3889         } else {
3890                 print qq!<script type="text/javascript">\n!.
3891                       qq!window.onload = function () {\n!.
3892                       (gitweb_check_feature('javascript-actions') ?
3893                       qq!       fixLinks();\n! : '').
3894                       # last parameter to onloadTZSetup must be CSS class used by format_timestamp_html
3895                       qq!       onloadTZSetup('local', 'gitweb_tz', 'datetime');\n!.
3896                       qq!};\n!.
3897                       qq!</script>\n!;
3898         }
3899
3900         print "</body>\n" .
3901               "</html>";
3902 }
3903
3904 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3905 # Example: die_error(404, 'Hash not found')
3906 # By convention, use the following status codes (as defined in RFC 2616):
3907 # 400: Invalid or missing CGI parameters, or
3908 #      requested object exists but has wrong type.
3909 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3910 #      this server or project.
3911 # 404: Requested object/revision/project doesn't exist.
3912 # 500: The server isn't configured properly, or
3913 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3914 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3915 # 503: The server is currently unavailable (because it is overloaded,
3916 #      or down for maintenance).  Generally, this is a temporary state.
3917 sub die_error {
3918         my $status = shift || 500;
3919         my $error = esc_html(shift) || "Internal Server Error";
3920         my $extra = shift;
3921         my %opts = @_;
3922
3923         my %http_responses = (
3924                 400 => '400 Bad Request',
3925                 403 => '403 Forbidden',
3926                 404 => '404 Not Found',
3927                 500 => '500 Internal Server Error',
3928                 503 => '503 Service Unavailable',
3929         );
3930         git_header_html($http_responses{$status}, undef, %opts);
3931         print <<EOF;
3932 <div class="page_body">
3933 <br /><br />
3934 $status - $error
3935 <br />
3936 EOF
3937         if (defined $extra) {
3938                 print "<hr />\n" .
3939                       "$extra\n";
3940         }
3941         print "</div>\n";
3942
3943         git_footer_html();
3944         goto DONE_GITWEB
3945                 unless ($opts{'-error_handler'});
3946 }
3947
3948 ## ----------------------------------------------------------------------
3949 ## functions printing or outputting HTML: navigation
3950
3951 sub git_print_page_nav {
3952         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3953         $extra = '' if !defined $extra; # pager or formats
3954
3955         my @navs = qw(summary shortlog log commit commitdiff tree);
3956         if ($suppress) {
3957                 @navs = grep { $_ ne $suppress } @navs;
3958         }
3959
3960         my %arg = map { $_ => {action=>$_} } @navs;
3961         if (defined $head) {
3962                 for (qw(commit commitdiff)) {
3963                         $arg{$_}{'hash'} = $head;
3964                 }
3965                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3966                         for (qw(shortlog log)) {
3967                                 $arg{$_}{'hash'} = $head;
3968                         }
3969                 }
3970         }
3971
3972         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3973         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3974
3975         my @actions = gitweb_get_feature('actions');
3976         my %repl = (
3977                 '%' => '%',
3978                 'n' => $project,         # project name
3979                 'f' => $git_dir,         # project path within filesystem
3980                 'h' => $treehead || '',  # current hash ('h' parameter)
3981                 'b' => $treebase || '',  # hash base ('hb' parameter)
3982         );
3983         while (@actions) {
3984                 my ($label, $link, $pos) = splice(@actions,0,3);
3985                 # insert
3986                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3987                 # munch munch
3988                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3989                 $arg{$label}{'_href'} = $link;
3990         }
3991
3992         print "<div class=\"page_nav\">\n" .
3993                 (join " | ",
3994                  map { $_ eq $current ?
3995                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3996                  } @navs);
3997         print "<br/>\n$extra<br/>\n" .
3998               "</div>\n";
3999 }
4000
4001 # returns a submenu for the nagivation of the refs views (tags, heads,
4002 # remotes) with the current view disabled and the remotes view only
4003 # available if the feature is enabled
4004 sub format_ref_views {
4005         my ($current) = @_;
4006         my @ref_views = qw{tags heads};
4007         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4008         return join " | ", map {
4009                 $_ eq $current ? $_ :
4010                 $cgi->a({-href => href(action=>$_)}, $_)
4011         } @ref_views
4012 }
4013
4014 sub format_paging_nav {
4015         my ($action, $page, $has_next_link) = @_;
4016         my $paging_nav;
4017
4018
4019         if ($page > 0) {
4020                 $paging_nav .=
4021                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4022                         " &sdot; " .
4023                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4024                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4025         } else {
4026                 $paging_nav .= "first &sdot; prev";
4027         }
4028
4029         if ($has_next_link) {
4030                 $paging_nav .= " &sdot; " .
4031                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4032                                  -accesskey => "n", -title => "Alt-n"}, "next");
4033         } else {
4034                 $paging_nav .= " &sdot; next";
4035         }
4036
4037         return $paging_nav;
4038 }
4039
4040 ## ......................................................................
4041 ## functions printing or outputting HTML: div
4042
4043 sub git_print_header_div {
4044         my ($action, $title, $hash, $hash_base) = @_;
4045         my %args = ();
4046
4047         $args{'action'} = $action;
4048         $args{'hash'} = $hash if $hash;
4049         $args{'hash_base'} = $hash_base if $hash_base;
4050
4051         print "<div class=\"header\">\n" .
4052               $cgi->a({-href => href(%args), -class => "title"},
4053               $title ? $title : $action) .
4054               "\n</div>\n";
4055 }
4056
4057 sub format_repo_url {
4058         my ($name, $url) = @_;
4059         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4060 }
4061
4062 # Group output by placing it in a DIV element and adding a header.
4063 # Options for start_div() can be provided by passing a hash reference as the
4064 # first parameter to the function.
4065 # Options to git_print_header_div() can be provided by passing an array
4066 # reference. This must follow the options to start_div if they are present.
4067 # The content can be a scalar, which is output as-is, a scalar reference, which
4068 # is output after html escaping, an IO handle passed either as *handle or
4069 # *handle{IO}, or a function reference. In the latter case all following
4070 # parameters will be taken as argument to the content function call.
4071 sub git_print_section {
4072         my ($div_args, $header_args, $content);
4073         my $arg = shift;
4074         if (ref($arg) eq 'HASH') {
4075                 $div_args = $arg;
4076                 $arg = shift;
4077         }
4078         if (ref($arg) eq 'ARRAY') {
4079                 $header_args = $arg;
4080                 $arg = shift;
4081         }
4082         $content = $arg;
4083
4084         print $cgi->start_div($div_args);
4085         git_print_header_div(@$header_args);
4086
4087         if (ref($content) eq 'CODE') {
4088                 $content->(@_);
4089         } elsif (ref($content) eq 'SCALAR') {
4090                 print esc_html($$content);
4091         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4092                 print <$content>;
4093         } elsif (!ref($content) && defined($content)) {
4094                 print $content;
4095         }
4096
4097         print $cgi->end_div;
4098 }
4099
4100 sub format_timestamp_html {
4101         my $date = shift;
4102         my $strtime = '<span class="datetime">'.$date->{'rfc2822'}.'</span>';
4103
4104         my $localtime_format = '(%02d:%02d %s)';
4105         if ($date->{'hour_local'} < 6) {
4106                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4107         }
4108         $strtime .= ' ' .
4109                     sprintf($localtime_format,
4110                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4111
4112         return $strtime;
4113 }
4114
4115 # Outputs the author name and date in long form
4116 sub git_print_authorship {
4117         my $co = shift;
4118         my %opts = @_;
4119         my $tag = $opts{-tag} || 'div';
4120         my $author = $co->{'author_name'};
4121
4122         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4123         print "<$tag class=\"author_date\">" .
4124               format_search_author($author, "author", esc_html($author)) .
4125               " [".format_timestamp_html(\%ad)."]".
4126               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4127               "</$tag>\n";
4128 }
4129
4130 # Outputs table rows containing the full author or committer information,
4131 # in the format expected for 'commit' view (& similar).
4132 # Parameters are a commit hash reference, followed by the list of people
4133 # to output information for. If the list is empty it defaults to both
4134 # author and committer.
4135 sub git_print_authorship_rows {
4136         my $co = shift;
4137         # too bad we can't use @people = @_ || ('author', 'committer')
4138         my @people = @_;
4139         @people = ('author', 'committer') unless @people;
4140         foreach my $who (@people) {
4141                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4142                 print "<tr><td>$who</td><td>" .
4143                       format_search_author($co->{"${who}_name"}, $who,
4144                                            esc_html($co->{"${who}_name"})) . " " .
4145                       format_search_author($co->{"${who}_email"}, $who,
4146                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4147                       "</td><td rowspan=\"2\">" .
4148                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4149                       "</td></tr>\n" .
4150                       "<tr>" .
4151                       "<td></td><td>" .
4152                       format_timestamp_html(\%wd) .
4153                       "</td>" .
4154                       "</tr>\n";
4155         }
4156 }
4157
4158 sub git_print_page_path {
4159         my $name = shift;
4160         my $type = shift;
4161         my $hb = shift;
4162
4163
4164         print "<div class=\"page_path\">";
4165         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4166                       -title => 'tree root'}, to_utf8("[$project]"));
4167         print " / ";
4168         if (defined $name) {
4169                 my @dirname = split '/', $name;
4170                 my $basename = pop @dirname;
4171                 my $fullname = '';
4172
4173                 foreach my $dir (@dirname) {
4174                         $fullname .= ($fullname ? '/' : '') . $dir;
4175                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4176                                                      hash_base=>$hb),
4177                                       -title => $fullname}, esc_path($dir));
4178                         print " / ";
4179                 }
4180                 if (defined $type && $type eq 'blob') {
4181                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4182                                                      hash_base=>$hb),
4183                                       -title => $name}, esc_path($basename));
4184                 } elsif (defined $type && $type eq 'tree') {
4185                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4186                                                      hash_base=>$hb),
4187                                       -title => $name}, esc_path($basename));
4188                         print " / ";
4189                 } else {
4190                         print esc_path($basename);
4191                 }
4192         }
4193         print "<br/></div>\n";
4194 }
4195
4196 sub git_print_log {
4197         my $log = shift;
4198         my %opts = @_;
4199
4200         if ($opts{'-remove_title'}) {
4201                 # remove title, i.e. first line of log
4202                 shift @$log;
4203         }
4204         # remove leading empty lines
4205         while (defined $log->[0] && $log->[0] eq "") {
4206                 shift @$log;
4207         }
4208
4209         # print log
4210         my $signoff = 0;
4211         my $empty = 0;
4212         foreach my $line (@$log) {
4213                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4214                         $signoff = 1;
4215                         $empty = 0;
4216                         if (! $opts{'-remove_signoff'}) {
4217                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4218                                 next;
4219                         } else {
4220                                 # remove signoff lines
4221                                 next;
4222                         }
4223                 } else {
4224                         $signoff = 0;
4225                 }
4226
4227                 # print only one empty line
4228                 # do not print empty line after signoff
4229                 if ($line eq "") {
4230                         next if ($empty || $signoff);
4231                         $empty = 1;
4232                 } else {
4233                         $empty = 0;
4234                 }
4235
4236                 print format_log_line_html($line) . "<br/>\n";
4237         }
4238
4239         if ($opts{'-final_empty_line'}) {
4240                 # end with single empty line
4241                 print "<br/>\n" unless $empty;
4242         }
4243 }
4244
4245 # return link target (what link points to)
4246 sub git_get_link_target {
4247         my $hash = shift;
4248         my $link_target;
4249
4250         # read link
4251         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4252                 or return;
4253         {
4254                 local $/ = undef;
4255                 $link_target = <$fd>;
4256         }
4257         close $fd
4258                 or return;
4259
4260         return $link_target;
4261 }
4262
4263 # given link target, and the directory (basedir) the link is in,
4264 # return target of link relative to top directory (top tree);
4265 # return undef if it is not possible (including absolute links).
4266 sub normalize_link_target {
4267         my ($link_target, $basedir) = @_;
4268
4269         # absolute symlinks (beginning with '/') cannot be normalized
4270         return if (substr($link_target, 0, 1) eq '/');
4271
4272         # normalize link target to path from top (root) tree (dir)
4273         my $path;
4274         if ($basedir) {
4275                 $path = $basedir . '/' . $link_target;
4276         } else {
4277                 # we are in top (root) tree (dir)
4278                 $path = $link_target;
4279         }
4280
4281         # remove //, /./, and /../
4282         my @path_parts;
4283         foreach my $part (split('/', $path)) {
4284                 # discard '.' and ''
4285                 next if (!$part || $part eq '.');
4286                 # handle '..'
4287                 if ($part eq '..') {
4288                         if (@path_parts) {
4289                                 pop @path_parts;
4290                         } else {
4291                                 # link leads outside repository (outside top dir)
4292                                 return;
4293                         }
4294                 } else {
4295                         push @path_parts, $part;
4296                 }
4297         }
4298         $path = join('/', @path_parts);
4299
4300         return $path;
4301 }
4302
4303 # print tree entry (row of git_tree), but without encompassing <tr> element
4304 sub git_print_tree_entry {
4305         my ($t, $basedir, $hash_base, $have_blame) = @_;
4306
4307         my %base_key = ();
4308         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4309
4310         # The format of a table row is: mode list link.  Where mode is
4311         # the mode of the entry, list is the name of the entry, an href,
4312         # and link is the action links of the entry.
4313
4314         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4315         if (exists $t->{'size'}) {
4316                 print "<td class=\"size\">$t->{'size'}</td>\n";
4317         }
4318         if ($t->{'type'} eq "blob") {
4319                 print "<td class=\"list\">" .
4320                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4321                                                file_name=>"$basedir$t->{'name'}", %base_key),
4322                                 -class => "list"}, esc_path($t->{'name'}));
4323                 if (S_ISLNK(oct $t->{'mode'})) {
4324                         my $link_target = git_get_link_target($t->{'hash'});
4325                         if ($link_target) {
4326                                 my $norm_target = normalize_link_target($link_target, $basedir);
4327                                 if (defined $norm_target) {
4328                                         print " -> " .
4329                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4330                                                                      file_name=>$norm_target),
4331                                                        -title => $norm_target}, esc_path($link_target));
4332                                 } else {
4333                                         print " -> " . esc_path($link_target);
4334                                 }
4335                         }
4336                 }
4337                 print "</td>\n";
4338                 print "<td class=\"link\">";
4339                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4340                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4341                               "blob");
4342                 if ($have_blame) {
4343                         print " | " .
4344                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4345                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4346                                       "blame");
4347                 }
4348                 if (defined $hash_base) {
4349                         print " | " .
4350                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4351                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4352                                       "history");
4353                 }
4354                 print " | " .
4355                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4356                                                file_name=>"$basedir$t->{'name'}")},
4357                                 "raw");
4358                 print "</td>\n";
4359
4360         } elsif ($t->{'type'} eq "tree") {
4361                 print "<td class=\"list\">";
4362                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4363                                              file_name=>"$basedir$t->{'name'}",
4364                                              %base_key)},
4365                               esc_path($t->{'name'}));
4366                 print "</td>\n";
4367                 print "<td class=\"link\">";
4368                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4369                                              file_name=>"$basedir$t->{'name'}",
4370                                              %base_key)},
4371                               "tree");
4372                 if (defined $hash_base) {
4373                         print " | " .
4374                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4375                                                      file_name=>"$basedir$t->{'name'}")},
4376                                       "history");
4377                 }
4378                 print "</td>\n";
4379         } else {
4380                 # unknown object: we can only present history for it
4381                 # (this includes 'commit' object, i.e. submodule support)
4382                 print "<td class=\"list\">" .
4383                       esc_path($t->{'name'}) .
4384                       "</td>\n";
4385                 print "<td class=\"link\">";
4386                 if (defined $hash_base) {
4387                         print $cgi->a({-href => href(action=>"history",
4388                                                      hash_base=>$hash_base,
4389                                                      file_name=>"$basedir$t->{'name'}")},
4390                                       "history");
4391                 }
4392                 print "</td>\n";
4393         }
4394 }
4395
4396 ## ......................................................................
4397 ## functions printing large fragments of HTML
4398
4399 # get pre-image filenames for merge (combined) diff
4400 sub fill_from_file_info {
4401         my ($diff, @parents) = @_;
4402
4403         $diff->{'from_file'} = [ ];
4404         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4405         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4406                 if ($diff->{'status'}[$i] eq 'R' ||
4407                     $diff->{'status'}[$i] eq 'C') {
4408                         $diff->{'from_file'}[$i] =
4409                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4410                 }
4411         }
4412
4413         return $diff;
4414 }
4415
4416 # is current raw difftree line of file deletion
4417 sub is_deleted {
4418         my $diffinfo = shift;
4419
4420         return $diffinfo->{'to_id'} eq ('0' x 40);
4421 }
4422
4423 # does patch correspond to [previous] difftree raw line
4424 # $diffinfo  - hashref of parsed raw diff format
4425 # $patchinfo - hashref of parsed patch diff format
4426 #              (the same keys as in $diffinfo)
4427 sub is_patch_split {
4428         my ($diffinfo, $patchinfo) = @_;
4429
4430         return defined $diffinfo && defined $patchinfo
4431                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4432 }
4433
4434
4435 sub git_difftree_body {
4436         my ($difftree, $hash, @parents) = @_;
4437         my ($parent) = $parents[0];
4438         my $have_blame = gitweb_check_feature('blame');
4439         print "<div class=\"list_head\">\n";
4440         if ($#{$difftree} > 10) {
4441                 print(($#{$difftree} + 1) . " files changed:\n");
4442         }
4443         print "</div>\n";
4444
4445         print "<table class=\"" .
4446               (@parents > 1 ? "combined " : "") .
4447               "diff_tree\">\n";
4448
4449         # header only for combined diff in 'commitdiff' view
4450         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4451         if ($has_header) {
4452                 # table header
4453                 print "<thead><tr>\n" .
4454                        "<th></th><th></th>\n"; # filename, patchN link
4455                 for (my $i = 0; $i < @parents; $i++) {
4456                         my $par = $parents[$i];
4457                         print "<th>" .
4458                               $cgi->a({-href => href(action=>"commitdiff",
4459                                                      hash=>$hash, hash_parent=>$par),
4460                                        -title => 'commitdiff to parent number ' .
4461                                                   ($i+1) . ': ' . substr($par,0,7)},
4462                                       $i+1) .
4463                               "&nbsp;</th>\n";
4464                 }
4465                 print "</tr></thead>\n<tbody>\n";
4466         }
4467
4468         my $alternate = 1;
4469         my $patchno = 0;
4470         foreach my $line (@{$difftree}) {
4471                 my $diff = parsed_difftree_line($line);
4472
4473                 if ($alternate) {
4474                         print "<tr class=\"dark\">\n";
4475                 } else {
4476                         print "<tr class=\"light\">\n";
4477                 }
4478                 $alternate ^= 1;
4479
4480                 if (exists $diff->{'nparents'}) { # combined diff
4481
4482                         fill_from_file_info($diff, @parents)
4483                                 unless exists $diff->{'from_file'};
4484
4485                         if (!is_deleted($diff)) {
4486                                 # file exists in the result (child) commit
4487                                 print "<td>" .
4488                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4489                                                              file_name=>$diff->{'to_file'},
4490                                                              hash_base=>$hash),
4491                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4492                                       "</td>\n";
4493                         } else {
4494                                 print "<td>" .
4495                                       esc_path($diff->{'to_file'}) .
4496                                       "</td>\n";
4497                         }
4498
4499                         if ($action eq 'commitdiff') {
4500                                 # link to patch
4501                                 $patchno++;
4502                                 print "<td class=\"link\">" .
4503                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4504                                               "patch") .
4505                                       " | " .
4506                                       "</td>\n";
4507                         }
4508
4509                         my $has_history = 0;
4510                         my $not_deleted = 0;
4511                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4512                                 my $hash_parent = $parents[$i];
4513                                 my $from_hash = $diff->{'from_id'}[$i];
4514                                 my $from_path = $diff->{'from_file'}[$i];
4515                                 my $status = $diff->{'status'}[$i];
4516
4517                                 $has_history ||= ($status ne 'A');
4518                                 $not_deleted ||= ($status ne 'D');
4519
4520                                 if ($status eq 'A') {
4521                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4522                                 } elsif ($status eq 'D') {
4523                                         print "<td class=\"link\">" .
4524                                               $cgi->a({-href => href(action=>"blob",
4525                                                                      hash_base=>$hash,
4526                                                                      hash=>$from_hash,
4527                                                                      file_name=>$from_path)},
4528                                                       "blob" . ($i+1)) .
4529                                               " | </td>\n";
4530                                 } else {
4531                                         if ($diff->{'to_id'} eq $from_hash) {
4532                                                 print "<td class=\"link nochange\">";
4533                                         } else {
4534                                                 print "<td class=\"link\">";
4535                                         }
4536                                         print $cgi->a({-href => href(action=>"blobdiff",
4537                                                                      hash=>$diff->{'to_id'},
4538                                                                      hash_parent=>$from_hash,
4539                                                                      hash_base=>$hash,
4540                                                                      hash_parent_base=>$hash_parent,
4541                                                                      file_name=>$diff->{'to_file'},
4542                                                                      file_parent=>$from_path)},
4543                                                       "diff" . ($i+1)) .
4544                                               " | </td>\n";
4545                                 }
4546                         }
4547
4548                         print "<td class=\"link\">";
4549                         if ($not_deleted) {
4550                                 print $cgi->a({-href => href(action=>"blob",
4551                                                              hash=>$diff->{'to_id'},
4552                                                              file_name=>$diff->{'to_file'},
4553                                                              hash_base=>$hash)},
4554                                               "blob");
4555                                 print " | " if ($has_history);
4556                         }
4557                         if ($has_history) {
4558                                 print $cgi->a({-href => href(action=>"history",
4559                                                              file_name=>$diff->{'to_file'},
4560                                                              hash_base=>$hash)},
4561                                               "history");
4562                         }
4563                         print "</td>\n";
4564
4565                         print "</tr>\n";
4566                         next; # instead of 'else' clause, to avoid extra indent
4567                 }
4568                 # else ordinary diff
4569
4570                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4571                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4572                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4573                         $to_mode_oct = oct $diff->{'to_mode'};
4574                         if (S_ISREG($to_mode_oct)) { # only for regular file
4575                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4576                         }
4577                         $to_file_type = file_type($diff->{'to_mode'});
4578                 }
4579                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4580                         $from_mode_oct = oct $diff->{'from_mode'};
4581                         if (S_ISREG($from_mode_oct)) { # only for regular file
4582                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4583                         }
4584                         $from_file_type = file_type($diff->{'from_mode'});
4585                 }
4586
4587                 if ($diff->{'status'} eq "A") { # created
4588                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4589                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4590                         $mode_chng   .= "]</span>";
4591                         print "<td>";
4592                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4593                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4594                                       -class => "list"}, esc_path($diff->{'file'}));
4595                         print "</td>\n";
4596                         print "<td>$mode_chng</td>\n";
4597                         print "<td class=\"link\">";
4598                         if ($action eq 'commitdiff') {
4599                                 # link to patch
4600                                 $patchno++;
4601                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4602                                               "patch") .
4603                                       " | ";
4604                         }
4605                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4606                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4607                                       "blob");
4608                         print "</td>\n";
4609
4610                 } elsif ($diff->{'status'} eq "D") { # deleted
4611                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4612                         print "<td>";
4613                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4614                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4615                                        -class => "list"}, esc_path($diff->{'file'}));
4616                         print "</td>\n";
4617                         print "<td>$mode_chng</td>\n";
4618                         print "<td class=\"link\">";
4619                         if ($action eq 'commitdiff') {
4620                                 # link to patch
4621                                 $patchno++;
4622                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4623                                               "patch") .
4624                                       " | ";
4625                         }
4626                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4627                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4628                                       "blob") . " | ";
4629                         if ($have_blame) {
4630                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4631                                                              file_name=>$diff->{'file'})},
4632                                               "blame") . " | ";
4633                         }
4634                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4635                                                      file_name=>$diff->{'file'})},
4636                                       "history");
4637                         print "</td>\n";
4638
4639                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4640                         my $mode_chnge = "";
4641                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4642                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4643                                 if ($from_file_type ne $to_file_type) {
4644                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4645                                 }
4646                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4647                                         if ($from_mode_str && $to_mode_str) {
4648                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4649                                         } elsif ($to_mode_str) {
4650                                                 $mode_chnge .= " mode: $to_mode_str";
4651                                         }
4652                                 }
4653                                 $mode_chnge .= "]</span>\n";
4654                         }
4655                         print "<td>";
4656                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4657                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4658                                       -class => "list"}, esc_path($diff->{'file'}));
4659                         print "</td>\n";
4660                         print "<td>$mode_chnge</td>\n";
4661                         print "<td class=\"link\">";
4662                         if ($action eq 'commitdiff') {
4663                                 # link to patch
4664                                 $patchno++;
4665                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4666                                               "patch") .
4667                                       " | ";
4668                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4669                                 # "commit" view and modified file (not onlu mode changed)
4670                                 print $cgi->a({-href => href(action=>"blobdiff",
4671                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4672                                                              hash_base=>$hash, hash_parent_base=>$parent,
4673                                                              file_name=>$diff->{'file'})},
4674                                               "diff") .
4675                                       " | ";
4676                         }
4677                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4678                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4679                                        "blob") . " | ";
4680                         if ($have_blame) {
4681                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4682                                                              file_name=>$diff->{'file'})},
4683                                               "blame") . " | ";
4684                         }
4685                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4686                                                      file_name=>$diff->{'file'})},
4687                                       "history");
4688                         print "</td>\n";
4689
4690                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4691                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4692                         my $nstatus = $status_name{$diff->{'status'}};
4693                         my $mode_chng = "";
4694                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4695                                 # mode also for directories, so we cannot use $to_mode_str
4696                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4697                         }
4698                         print "<td>" .
4699                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4700                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4701                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4702                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4703                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4704                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4705                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4706                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4707                               "<td class=\"link\">";
4708                         if ($action eq 'commitdiff') {
4709                                 # link to patch
4710                                 $patchno++;
4711                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4712                                               "patch") .
4713                                       " | ";
4714                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4715                                 # "commit" view and modified file (not only pure rename or copy)
4716                                 print $cgi->a({-href => href(action=>"blobdiff",
4717                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4718                                                              hash_base=>$hash, hash_parent_base=>$parent,
4719                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4720                                               "diff") .
4721                                       " | ";
4722                         }
4723                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4724                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4725                                       "blob") . " | ";
4726                         if ($have_blame) {
4727                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4728                                                              file_name=>$diff->{'to_file'})},
4729                                               "blame") . " | ";
4730                         }
4731                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4732                                                     file_name=>$diff->{'to_file'})},
4733                                       "history");
4734                         print "</td>\n";
4735
4736                 } # we should not encounter Unmerged (U) or Unknown (X) status
4737                 print "</tr>\n";
4738         }
4739         print "</tbody>" if $has_header;
4740         print "</table>\n";
4741 }
4742
4743 sub git_patchset_body {
4744         my ($fd, $difftree, $hash, @hash_parents) = @_;
4745         my ($hash_parent) = $hash_parents[0];
4746
4747         my $is_combined = (@hash_parents > 1);
4748         my $patch_idx = 0;
4749         my $patch_number = 0;
4750         my $patch_line;
4751         my $diffinfo;
4752         my $to_name;
4753         my (%from, %to);
4754
4755         print "<div class=\"patchset\">\n";
4756
4757         # skip to first patch
4758         while ($patch_line = <$fd>) {
4759                 chomp $patch_line;
4760
4761                 last if ($patch_line =~ m/^diff /);
4762         }
4763
4764  PATCH:
4765         while ($patch_line) {
4766
4767                 # parse "git diff" header line
4768                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4769                         # $1 is from_name, which we do not use
4770                         $to_name = unquote($2);
4771                         $to_name =~ s!^b/!!;
4772                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4773                         # $1 is 'cc' or 'combined', which we do not use
4774                         $to_name = unquote($2);
4775                 } else {
4776                         $to_name = undef;
4777                 }
4778
4779                 # check if current patch belong to current raw line
4780                 # and parse raw git-diff line if needed
4781                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4782                         # this is continuation of a split patch
4783                         print "<div class=\"patch cont\">\n";
4784                 } else {
4785                         # advance raw git-diff output if needed
4786                         $patch_idx++ if defined $diffinfo;
4787
4788                         # read and prepare patch information
4789                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4790
4791                         # compact combined diff output can have some patches skipped
4792                         # find which patch (using pathname of result) we are at now;
4793                         if ($is_combined) {
4794                                 while ($to_name ne $diffinfo->{'to_file'}) {
4795                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4796                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4797                                               "</div>\n";  # class="patch"
4798
4799                                         $patch_idx++;
4800                                         $patch_number++;
4801
4802                                         last if $patch_idx > $#$difftree;
4803                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4804                                 }
4805                         }
4806
4807                         # modifies %from, %to hashes
4808                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4809
4810                         # this is first patch for raw difftree line with $patch_idx index
4811                         # we index @$difftree array from 0, but number patches from 1
4812                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4813                 }
4814
4815                 # git diff header
4816                 #assert($patch_line =~ m/^diff /) if DEBUG;
4817                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4818                 $patch_number++;
4819                 # print "git diff" header
4820                 print format_git_diff_header_line($patch_line, $diffinfo,
4821                                                   \%from, \%to);
4822
4823                 # print extended diff header
4824                 print "<div class=\"diff extended_header\">\n";
4825         EXTENDED_HEADER:
4826                 while ($patch_line = <$fd>) {
4827                         chomp $patch_line;
4828
4829                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4830
4831                         print format_extended_diff_header_line($patch_line, $diffinfo,
4832                                                                \%from, \%to);
4833                 }
4834                 print "</div>\n"; # class="diff extended_header"
4835
4836                 # from-file/to-file diff header
4837                 if (! $patch_line) {
4838                         print "</div>\n"; # class="patch"
4839                         last PATCH;
4840                 }
4841                 next PATCH if ($patch_line =~ m/^diff /);
4842                 #assert($patch_line =~ m/^---/) if DEBUG;
4843
4844                 my $last_patch_line = $patch_line;
4845                 $patch_line = <$fd>;
4846                 chomp $patch_line;
4847                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4848
4849                 print format_diff_from_to_header($last_patch_line, $patch_line,
4850                                                  $diffinfo, \%from, \%to,
4851                                                  @hash_parents);
4852
4853                 # the patch itself
4854         LINE:
4855                 while ($patch_line = <$fd>) {
4856                         chomp $patch_line;
4857
4858                         next PATCH if ($patch_line =~ m/^diff /);
4859
4860                         print format_diff_line($patch_line, \%from, \%to);
4861                 }
4862
4863         } continue {
4864                 print "</div>\n"; # class="patch"
4865         }
4866
4867         # for compact combined (--cc) format, with chunk and patch simplification
4868         # the patchset might be empty, but there might be unprocessed raw lines
4869         for (++$patch_idx if $patch_number > 0;
4870              $patch_idx < @$difftree;
4871              ++$patch_idx) {
4872                 # read and prepare patch information
4873                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4874
4875                 # generate anchor for "patch" links in difftree / whatchanged part
4876                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4877                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4878                       "</div>\n";  # class="patch"
4879
4880                 $patch_number++;
4881         }
4882
4883         if ($patch_number == 0) {
4884                 if (@hash_parents > 1) {
4885                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4886                 } else {
4887                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4888                 }
4889         }
4890
4891         print "</div>\n"; # class="patchset"
4892 }
4893
4894 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4895
4896 # fills project list info (age, description, owner, category, forks)
4897 # for each project in the list, removing invalid projects from
4898 # returned list
4899 # NOTE: modifies $projlist, but does not remove entries from it
4900 sub fill_project_list_info {
4901         my $projlist = shift;
4902         my @projects;
4903
4904         my $show_ctags = gitweb_check_feature('ctags');
4905  PROJECT:
4906         foreach my $pr (@$projlist) {
4907                 my (@activity) = git_get_last_activity($pr->{'path'});
4908                 unless (@activity) {
4909                         next PROJECT;
4910                 }
4911                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4912                 if (!defined $pr->{'descr'}) {
4913                         my $descr = git_get_project_description($pr->{'path'}) || "";
4914                         $descr = to_utf8($descr);
4915                         $pr->{'descr_long'} = $descr;
4916                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4917                 }
4918                 if (!defined $pr->{'owner'}) {
4919                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4920                 }
4921                 if ($show_ctags) {
4922                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4923                 }
4924                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4925                         my $cat = git_get_project_category($pr->{'path'}) ||
4926                                                            $project_list_default_category;
4927                         $pr->{'category'} = to_utf8($cat);
4928                 }
4929
4930                 push @projects, $pr;
4931         }
4932
4933         return @projects;
4934 }
4935
4936 sub sort_projects_list {
4937         my ($projlist, $order) = @_;
4938         my @projects;
4939
4940         my %order_info = (
4941                 project => { key => 'path', type => 'str' },
4942                 descr => { key => 'descr_long', type => 'str' },
4943                 owner => { key => 'owner', type => 'str' },
4944                 age => { key => 'age', type => 'num' }
4945         );
4946         my $oi = $order_info{$order};
4947         return @$projlist unless defined $oi;
4948         if ($oi->{'type'} eq 'str') {
4949                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4950         } else {
4951                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4952         }
4953
4954         return @projects;
4955 }
4956
4957 # returns a hash of categories, containing the list of project
4958 # belonging to each category
4959 sub build_projlist_by_category {
4960         my ($projlist, $from, $to) = @_;
4961         my %categories;
4962
4963         $from = 0 unless defined $from;
4964         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4965
4966         for (my $i = $from; $i <= $to; $i++) {
4967                 my $pr = $projlist->[$i];
4968                 push @{$categories{ $pr->{'category'} }}, $pr;
4969         }
4970
4971         return wantarray ? %categories : \%categories;
4972 }
4973
4974 # print 'sort by' <th> element, generating 'sort by $name' replay link
4975 # if that order is not selected
4976 sub print_sort_th {
4977         print format_sort_th(@_);
4978 }
4979
4980 sub format_sort_th {
4981         my ($name, $order, $header) = @_;
4982         my $sort_th = "";
4983         $header ||= ucfirst($name);
4984
4985         if ($order eq $name) {
4986                 $sort_th .= "<th>$header</th>\n";
4987         } else {
4988                 $sort_th .= "<th>" .
4989                             $cgi->a({-href => href(-replay=>1, order=>$name),
4990                                      -class => "header"}, $header) .
4991                             "</th>\n";
4992         }
4993
4994         return $sort_th;
4995 }
4996
4997 sub git_project_list_rows {
4998         my ($projlist, $from, $to, $check_forks) = @_;
4999
5000         $from = 0 unless defined $from;
5001         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5002
5003         my $alternate = 1;
5004         for (my $i = $from; $i <= $to; $i++) {
5005                 my $pr = $projlist->[$i];
5006
5007                 if ($alternate) {
5008                         print "<tr class=\"dark\">\n";
5009                 } else {
5010                         print "<tr class=\"light\">\n";
5011                 }
5012                 $alternate ^= 1;
5013
5014                 if ($check_forks) {
5015                         print "<td>";
5016                         if ($pr->{'forks'}) {
5017                                 my $nforks = scalar @{$pr->{'forks'}};
5018                                 if ($nforks > 0) {
5019                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5020                                                        -title => "$nforks forks"}, "+");
5021                                 } else {
5022                                         print $cgi->span({-title => "$nforks forks"}, "+");
5023                                 }
5024                         }
5025                         print "</td>\n";
5026                 }
5027                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5028                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5029                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5030                                         -class => "list", -title => $pr->{'descr_long'}},
5031                                         esc_html($pr->{'descr'})) . "</td>\n" .
5032                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5033                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5034                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5035                       "<td class=\"link\">" .
5036                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5037                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5038                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5039                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5040                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5041                       "</td>\n" .
5042                       "</tr>\n";
5043         }
5044 }
5045
5046 sub git_project_list_body {
5047         # actually uses global variable $project
5048         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5049         my @projects = @$projlist;
5050
5051         my $check_forks = gitweb_check_feature('forks');
5052         my $show_ctags  = gitweb_check_feature('ctags');
5053         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5054         $check_forks = undef
5055                 if ($tagfilter || $searchtext);
5056
5057         # filtering out forks before filling info allows to do less work
5058         @projects = filter_forks_from_projects_list(\@projects)
5059                 if ($check_forks);
5060         @projects = fill_project_list_info(\@projects);
5061         # searching projects require filling to be run before it
5062         @projects = search_projects_list(\@projects,
5063                                          'searchtext' => $searchtext,
5064                                          'tagfilter'  => $tagfilter)
5065                 if ($tagfilter || $searchtext);
5066
5067         $order ||= $default_projects_order;
5068         $from = 0 unless defined $from;
5069         $to = $#projects if (!defined $to || $#projects < $to);
5070
5071         # short circuit
5072         if ($from > $to) {
5073                 print "<center>\n".
5074                       "<b>No such projects found</b><br />\n".
5075                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5076                       "</center>\n<br />\n";
5077                 return;
5078         }
5079
5080         @projects = sort_projects_list(\@projects, $order);
5081
5082         if ($show_ctags) {
5083                 my $ctags = git_gather_all_ctags(\@projects);
5084                 my $cloud = git_populate_project_tagcloud($ctags);
5085                 print git_show_project_tagcloud($cloud, 64);
5086         }
5087
5088         print "<table class=\"project_list\">\n";
5089         unless ($no_header) {
5090                 print "<tr>\n";
5091                 if ($check_forks) {
5092                         print "<th></th>\n";
5093                 }
5094                 print_sort_th('project', $order, 'Project');
5095                 print_sort_th('descr', $order, 'Description');
5096                 print_sort_th('owner', $order, 'Owner');
5097                 print_sort_th('age', $order, 'Last Change');
5098                 print "<th></th>\n" . # for links
5099                       "</tr>\n";
5100         }
5101
5102         if ($projects_list_group_categories) {
5103                 # only display categories with projects in the $from-$to window
5104                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5105                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5106                 foreach my $cat (sort keys %categories) {
5107                         unless ($cat eq "") {
5108                                 print "<tr>\n";
5109                                 if ($check_forks) {
5110                                         print "<td></td>\n";
5111                                 }
5112                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5113                                 print "</tr>\n";
5114                         }
5115
5116                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5117                 }
5118         } else {
5119                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5120         }
5121
5122         if (defined $extra) {
5123                 print "<tr>\n";
5124                 if ($check_forks) {
5125                         print "<td></td>\n";
5126                 }
5127                 print "<td colspan=\"5\">$extra</td>\n" .
5128                       "</tr>\n";
5129         }
5130         print "</table>\n";
5131 }
5132
5133 sub git_log_body {
5134         # uses global variable $project
5135         my ($commitlist, $from, $to, $refs, $extra) = @_;
5136
5137         $from = 0 unless defined $from;
5138         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5139
5140         for (my $i = 0; $i <= $to; $i++) {
5141                 my %co = %{$commitlist->[$i]};
5142                 next if !%co;
5143                 my $commit = $co{'id'};
5144                 my $ref = format_ref_marker($refs, $commit);
5145                 git_print_header_div('commit',
5146                                "<span class=\"age\">$co{'age_string'}</span>" .
5147                                esc_html($co{'title'}) . $ref,
5148                                $commit);
5149                 print "<div class=\"title_text\">\n" .
5150                       "<div class=\"log_link\">\n" .
5151                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5152                       " | " .
5153                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5154                       " | " .
5155                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5156                       "<br/>\n" .
5157                       "</div>\n";
5158                       git_print_authorship(\%co, -tag => 'span');
5159                       print "<br/>\n</div>\n";
5160
5161                 print "<div class=\"log_body\">\n";
5162                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5163                 print "</div>\n";
5164         }
5165         if ($extra) {
5166                 print "<div class=\"page_nav\">\n";
5167                 print "$extra\n";
5168                 print "</div>\n";
5169         }
5170 }
5171
5172 sub git_shortlog_body {
5173         # uses global variable $project
5174         my ($commitlist, $from, $to, $refs, $extra) = @_;
5175
5176         $from = 0 unless defined $from;
5177         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5178
5179         print "<table class=\"shortlog\">\n";
5180         my $alternate = 1;
5181         for (my $i = $from; $i <= $to; $i++) {
5182                 my %co = %{$commitlist->[$i]};
5183                 my $commit = $co{'id'};
5184                 my $ref = format_ref_marker($refs, $commit);
5185                 if ($alternate) {
5186                         print "<tr class=\"dark\">\n";
5187                 } else {
5188                         print "<tr class=\"light\">\n";
5189                 }
5190                 $alternate ^= 1;
5191                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5192                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5193                       format_author_html('td', \%co, 10) . "<td>";
5194                 print format_subject_html($co{'title'}, $co{'title_short'},
5195                                           href(action=>"commit", hash=>$commit), $ref);
5196                 print "</td>\n" .
5197                       "<td class=\"link\">" .
5198                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5199                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5200                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5201                 my $snapshot_links = format_snapshot_links($commit);
5202                 if (defined $snapshot_links) {
5203                         print " | " . $snapshot_links;
5204                 }
5205                 print "</td>\n" .
5206                       "</tr>\n";
5207         }
5208         if (defined $extra) {
5209                 print "<tr>\n" .
5210                       "<td colspan=\"4\">$extra</td>\n" .
5211                       "</tr>\n";
5212         }
5213         print "</table>\n";
5214 }
5215
5216 sub git_history_body {
5217         # Warning: assumes constant type (blob or tree) during history
5218         my ($commitlist, $from, $to, $refs, $extra,
5219             $file_name, $file_hash, $ftype) = @_;
5220
5221         $from = 0 unless defined $from;
5222         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5223
5224         print "<table class=\"history\">\n";
5225         my $alternate = 1;
5226         for (my $i = $from; $i <= $to; $i++) {
5227                 my %co = %{$commitlist->[$i]};
5228                 if (!%co) {
5229                         next;
5230                 }
5231                 my $commit = $co{'id'};
5232
5233                 my $ref = format_ref_marker($refs, $commit);
5234
5235                 if ($alternate) {
5236                         print "<tr class=\"dark\">\n";
5237                 } else {
5238                         print "<tr class=\"light\">\n";
5239                 }
5240                 $alternate ^= 1;
5241                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5242         # shortlog:   format_author_html('td', \%co, 10)
5243                       format_author_html('td', \%co, 15, 3) . "<td>";
5244                 # originally git_history used chop_str($co{'title'}, 50)
5245                 print format_subject_html($co{'title'}, $co{'title_short'},
5246                                           href(action=>"commit", hash=>$commit), $ref);
5247                 print "</td>\n" .
5248                       "<td class=\"link\">" .
5249                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5250                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5251
5252                 if ($ftype eq 'blob') {
5253                         my $blob_current = $file_hash;
5254                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5255                         if (defined $blob_current && defined $blob_parent &&
5256                                         $blob_current ne $blob_parent) {
5257                                 print " | " .
5258                                         $cgi->a({-href => href(action=>"blobdiff",
5259                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5260                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5261                                                                file_name=>$file_name)},
5262                                                 "diff to current");
5263                         }
5264                 }
5265                 print "</td>\n" .
5266                       "</tr>\n";
5267         }
5268         if (defined $extra) {
5269                 print "<tr>\n" .
5270                       "<td colspan=\"4\">$extra</td>\n" .
5271                       "</tr>\n";
5272         }
5273         print "</table>\n";
5274 }
5275
5276 sub git_tags_body {
5277         # uses global variable $project
5278         my ($taglist, $from, $to, $extra) = @_;
5279         $from = 0 unless defined $from;
5280         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5281
5282         print "<table class=\"tags\">\n";
5283         my $alternate = 1;
5284         for (my $i = $from; $i <= $to; $i++) {
5285                 my $entry = $taglist->[$i];
5286                 my %tag = %$entry;
5287                 my $comment = $tag{'subject'};
5288                 my $comment_short;
5289                 if (defined $comment) {
5290                         $comment_short = chop_str($comment, 30, 5);
5291                 }
5292                 if ($alternate) {
5293                         print "<tr class=\"dark\">\n";
5294                 } else {
5295                         print "<tr class=\"light\">\n";
5296                 }
5297                 $alternate ^= 1;
5298                 if (defined $tag{'age'}) {
5299                         print "<td><i>$tag{'age'}</i></td>\n";
5300                 } else {
5301                         print "<td></td>\n";
5302                 }
5303                 print "<td>" .
5304                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5305                                -class => "list name"}, esc_html($tag{'name'})) .
5306                       "</td>\n" .
5307                       "<td>";
5308                 if (defined $comment) {
5309                         print format_subject_html($comment, $comment_short,
5310                                                   href(action=>"tag", hash=>$tag{'id'}));
5311                 }
5312                 print "</td>\n" .
5313                       "<td class=\"selflink\">";
5314                 if ($tag{'type'} eq "tag") {
5315                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5316                 } else {
5317                         print "&nbsp;";
5318                 }
5319                 print "</td>\n" .
5320                       "<td class=\"link\">" . " | " .
5321                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5322                 if ($tag{'reftype'} eq "commit") {
5323                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5324                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5325                 } elsif ($tag{'reftype'} eq "blob") {
5326                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5327                 }
5328                 print "</td>\n" .
5329                       "</tr>";
5330         }
5331         if (defined $extra) {
5332                 print "<tr>\n" .
5333                       "<td colspan=\"5\">$extra</td>\n" .
5334                       "</tr>\n";
5335         }
5336         print "</table>\n";
5337 }
5338
5339 sub git_heads_body {
5340         # uses global variable $project
5341         my ($headlist, $head, $from, $to, $extra) = @_;
5342         $from = 0 unless defined $from;
5343         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5344
5345         print "<table class=\"heads\">\n";
5346         my $alternate = 1;
5347         for (my $i = $from; $i <= $to; $i++) {
5348                 my $entry = $headlist->[$i];
5349                 my %ref = %$entry;
5350                 my $curr = $ref{'id'} eq $head;
5351                 if ($alternate) {
5352                         print "<tr class=\"dark\">\n";
5353                 } else {
5354                         print "<tr class=\"light\">\n";
5355                 }
5356                 $alternate ^= 1;
5357                 print "<td><i>$ref{'age'}</i></td>\n" .
5358                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5359                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5360                                -class => "list name"},esc_html($ref{'name'})) .
5361                       "</td>\n" .
5362                       "<td class=\"link\">" .
5363                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5364                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5365                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5366                       "</td>\n" .
5367                       "</tr>";
5368         }
5369         if (defined $extra) {
5370                 print "<tr>\n" .
5371                       "<td colspan=\"3\">$extra</td>\n" .
5372                       "</tr>\n";
5373         }
5374         print "</table>\n";
5375 }
5376
5377 # Display a single remote block
5378 sub git_remote_block {
5379         my ($remote, $rdata, $limit, $head) = @_;
5380
5381         my $heads = $rdata->{'heads'};
5382         my $fetch = $rdata->{'fetch'};
5383         my $push = $rdata->{'push'};
5384
5385         my $urls_table = "<table class=\"projects_list\">\n" ;
5386
5387         if (defined $fetch) {
5388                 if ($fetch eq $push) {
5389                         $urls_table .= format_repo_url("URL", $fetch);
5390                 } else {
5391                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5392                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5393                 }
5394         } elsif (defined $push) {
5395                 $urls_table .= format_repo_url("Push URL", $push);
5396         } else {
5397                 $urls_table .= format_repo_url("", "No remote URL");
5398         }
5399
5400         $urls_table .= "</table>\n";
5401
5402         my $dots;
5403         if (defined $limit && $limit < @$heads) {
5404                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5405         }
5406
5407         print $urls_table;
5408         git_heads_body($heads, $head, 0, $limit, $dots);
5409 }
5410
5411 # Display a list of remote names with the respective fetch and push URLs
5412 sub git_remotes_list {
5413         my ($remotedata, $limit) = @_;
5414         print "<table class=\"heads\">\n";
5415         my $alternate = 1;
5416         my @remotes = sort keys %$remotedata;
5417
5418         my $limited = $limit && $limit < @remotes;
5419
5420         $#remotes = $limit - 1 if $limited;
5421
5422         while (my $remote = shift @remotes) {
5423                 my $rdata = $remotedata->{$remote};
5424                 my $fetch = $rdata->{'fetch'};
5425                 my $push = $rdata->{'push'};
5426                 if ($alternate) {
5427                         print "<tr class=\"dark\">\n";
5428                 } else {
5429                         print "<tr class=\"light\">\n";
5430                 }
5431                 $alternate ^= 1;
5432                 print "<td>" .
5433                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5434                                -class=> "list name"},esc_html($remote)) .
5435                       "</td>";
5436                 print "<td class=\"link\">" .
5437                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5438                       " | " .
5439                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5440                       "</td>";
5441
5442                 print "</tr>\n";
5443         }
5444
5445         if ($limited) {
5446                 print "<tr>\n" .
5447                       "<td colspan=\"3\">" .
5448                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5449                       "</td>\n" . "</tr>\n";
5450         }
5451
5452         print "</table>";
5453 }
5454
5455 # Display remote heads grouped by remote, unless there are too many
5456 # remotes, in which case we only display the remote names
5457 sub git_remotes_body {
5458         my ($remotedata, $limit, $head) = @_;
5459         if ($limit and $limit < keys %$remotedata) {
5460                 git_remotes_list($remotedata, $limit);
5461         } else {
5462                 fill_remote_heads($remotedata);
5463                 while (my ($remote, $rdata) = each %$remotedata) {
5464                         git_print_section({-class=>"remote", -id=>$remote},
5465                                 ["remotes", $remote, $remote], sub {
5466                                         git_remote_block($remote, $rdata, $limit, $head);
5467                                 });
5468                 }
5469         }
5470 }
5471
5472 sub git_search_grep_body {
5473         my ($commitlist, $from, $to, $extra) = @_;
5474         $from = 0 unless defined $from;
5475         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5476
5477         print "<table class=\"commit_search\">\n";
5478         my $alternate = 1;
5479         for (my $i = $from; $i <= $to; $i++) {
5480                 my %co = %{$commitlist->[$i]};
5481                 if (!%co) {
5482                         next;
5483                 }
5484                 my $commit = $co{'id'};
5485                 if ($alternate) {
5486                         print "<tr class=\"dark\">\n";
5487                 } else {
5488                         print "<tr class=\"light\">\n";
5489                 }
5490                 $alternate ^= 1;
5491                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5492                       format_author_html('td', \%co, 15, 5) .
5493                       "<td>" .
5494                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5495                                -class => "list subject"},
5496                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5497                 my $comment = $co{'comment'};
5498                 foreach my $line (@$comment) {
5499                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5500                                 my ($lead, $match, $trail) = ($1, $2, $3);
5501                                 $match = chop_str($match, 70, 5, 'center');
5502                                 my $contextlen = int((80 - length($match))/2);
5503                                 $contextlen = 30 if ($contextlen > 30);
5504                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5505                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5506
5507                                 $lead  = esc_html($lead);
5508                                 $match = esc_html($match);
5509                                 $trail = esc_html($trail);
5510
5511                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5512                         }
5513                 }
5514                 print "</td>\n" .
5515                       "<td class=\"link\">" .
5516                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5517                       " | " .
5518                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5519                       " | " .
5520                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5521                 print "</td>\n" .
5522                       "</tr>\n";
5523         }
5524         if (defined $extra) {
5525                 print "<tr>\n" .
5526                       "<td colspan=\"3\">$extra</td>\n" .
5527                       "</tr>\n";
5528         }
5529         print "</table>\n";
5530 }
5531
5532 ## ======================================================================
5533 ## ======================================================================
5534 ## actions
5535
5536 sub git_project_list {
5537         my $order = $input_params{'order'};
5538         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5539                 die_error(400, "Unknown order parameter");
5540         }
5541
5542         my @list = git_get_projects_list();
5543         if (!@list) {
5544                 die_error(404, "No projects found");
5545         }
5546
5547         git_header_html();
5548         if (defined $home_text && -f $home_text) {
5549                 print "<div class=\"index_include\">\n";
5550                 insert_file($home_text);
5551                 print "</div>\n";
5552         }
5553         print $cgi->startform(-method => "get") .
5554               "<p class=\"projsearch\">Search:\n" .
5555               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5556               "</p>" .
5557               $cgi->end_form() . "\n";
5558         git_project_list_body(\@list, $order);
5559         git_footer_html();
5560 }
5561
5562 sub git_forks {
5563         my $order = $input_params{'order'};
5564         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5565                 die_error(400, "Unknown order parameter");
5566         }
5567
5568         my @list = git_get_projects_list($project);
5569         if (!@list) {
5570                 die_error(404, "No forks found");
5571         }
5572
5573         git_header_html();
5574         git_print_page_nav('','');
5575         git_print_header_div('summary', "$project forks");
5576         git_project_list_body(\@list, $order);
5577         git_footer_html();
5578 }
5579
5580 sub git_project_index {
5581         my @projects = git_get_projects_list();
5582         if (!@projects) {
5583                 die_error(404, "No projects found");
5584         }
5585
5586         print $cgi->header(
5587                 -type => 'text/plain',
5588                 -charset => 'utf-8',
5589                 -content_disposition => 'inline; filename="index.aux"');
5590
5591         foreach my $pr (@projects) {
5592                 if (!exists $pr->{'owner'}) {
5593                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5594                 }
5595
5596                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5597                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5598                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5599                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5600                 $path  =~ s/ /\+/g;
5601                 $owner =~ s/ /\+/g;
5602
5603                 print "$path $owner\n";
5604         }
5605 }
5606
5607 sub git_summary {
5608         my $descr = git_get_project_description($project) || "none";
5609         my %co = parse_commit("HEAD");
5610         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5611         my $head = $co{'id'};
5612         my $remote_heads = gitweb_check_feature('remote_heads');
5613
5614         my $owner = git_get_project_owner($project);
5615
5616         my $refs = git_get_references();
5617         # These get_*_list functions return one more to allow us to see if
5618         # there are more ...
5619         my @taglist  = git_get_tags_list(16);
5620         my @headlist = git_get_heads_list(16);
5621         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5622         my @forklist;
5623         my $check_forks = gitweb_check_feature('forks');
5624
5625         if ($check_forks) {
5626                 # find forks of a project
5627                 @forklist = git_get_projects_list($project);
5628                 # filter out forks of forks
5629                 @forklist = filter_forks_from_projects_list(\@forklist)
5630                         if (@forklist);
5631         }
5632
5633         git_header_html();
5634         git_print_page_nav('summary','', $head);
5635
5636         print "<div class=\"title\">&nbsp;</div>\n";
5637         print "<table class=\"projects_list\">\n" .
5638               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5639               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5640         if (defined $cd{'rfc2822'}) {
5641                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5642                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5643         }
5644
5645         # use per project git URL list in $projectroot/$project/cloneurl
5646         # or make project git URL from git base URL and project name
5647         my $url_tag = "URL";
5648         my @url_list = git_get_project_url_list($project);
5649         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5650         foreach my $git_url (@url_list) {
5651                 next unless $git_url;
5652                 print format_repo_url($url_tag, $git_url);
5653                 $url_tag = "";
5654         }
5655
5656         # Tag cloud
5657         my $show_ctags = gitweb_check_feature('ctags');
5658         if ($show_ctags) {
5659                 my $ctags = git_get_project_ctags($project);
5660                 if (%$ctags) {
5661                         # without ability to add tags, don't show if there are none
5662                         my $cloud = git_populate_project_tagcloud($ctags);
5663                         print "<tr id=\"metadata_ctags\">" .
5664                               "<td>content tags</td>" .
5665                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5666                               "</tr>\n";
5667                 }
5668         }
5669
5670         print "</table>\n";
5671
5672         # If XSS prevention is on, we don't include README.html.
5673         # TODO: Allow a readme in some safe format.
5674         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5675                 print "<div class=\"title\">readme</div>\n" .
5676                       "<div class=\"readme\">\n";
5677                 insert_file("$projectroot/$project/README.html");
5678                 print "\n</div>\n"; # class="readme"
5679         }
5680
5681         # we need to request one more than 16 (0..15) to check if
5682         # those 16 are all
5683         my @commitlist = $head ? parse_commits($head, 17) : ();
5684         if (@commitlist) {
5685                 git_print_header_div('shortlog');
5686                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5687                                   $#commitlist <=  15 ? undef :
5688                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5689         }
5690
5691         if (@taglist) {
5692                 git_print_header_div('tags');
5693                 git_tags_body(\@taglist, 0, 15,
5694                               $#taglist <=  15 ? undef :
5695                               $cgi->a({-href => href(action=>"tags")}, "..."));
5696         }
5697
5698         if (@headlist) {
5699                 git_print_header_div('heads');
5700                 git_heads_body(\@headlist, $head, 0, 15,
5701                                $#headlist <= 15 ? undef :
5702                                $cgi->a({-href => href(action=>"heads")}, "..."));
5703         }
5704
5705         if (%remotedata) {
5706                 git_print_header_div('remotes');
5707                 git_remotes_body(\%remotedata, 15, $head);
5708         }
5709
5710         if (@forklist) {
5711                 git_print_header_div('forks');
5712                 git_project_list_body(\@forklist, 'age', 0, 15,
5713                                       $#forklist <= 15 ? undef :
5714                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5715                                       'no_header');
5716         }
5717
5718         git_footer_html();
5719 }
5720
5721 sub git_tag {
5722         my %tag = parse_tag($hash);
5723
5724         if (! %tag) {
5725                 die_error(404, "Unknown tag object");
5726         }
5727
5728         my $head = git_get_head_hash($project);
5729         git_header_html();
5730         git_print_page_nav('','', $head,undef,$head);
5731         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5732         print "<div class=\"title_text\">\n" .
5733               "<table class=\"object_header\">\n" .
5734               "<tr>\n" .
5735               "<td>object</td>\n" .
5736               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5737                                $tag{'object'}) . "</td>\n" .
5738               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5739                                               $tag{'type'}) . "</td>\n" .
5740               "</tr>\n";
5741         if (defined($tag{'author'})) {
5742                 git_print_authorship_rows(\%tag, 'author');
5743         }
5744         print "</table>\n\n" .
5745               "</div>\n";
5746         print "<div class=\"page_body\">";
5747         my $comment = $tag{'comment'};
5748         foreach my $line (@$comment) {
5749                 chomp $line;
5750                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5751         }
5752         print "</div>\n";
5753         git_footer_html();
5754 }
5755
5756 sub git_blame_common {
5757         my $format = shift || 'porcelain';
5758         if ($format eq 'porcelain' && $cgi->param('js')) {
5759                 $format = 'incremental';
5760                 $action = 'blame_incremental'; # for page title etc
5761         }
5762
5763         # permissions
5764         gitweb_check_feature('blame')
5765                 or die_error(403, "Blame view not allowed");
5766
5767         # error checking
5768         die_error(400, "No file name given") unless $file_name;
5769         $hash_base ||= git_get_head_hash($project);
5770         die_error(404, "Couldn't find base commit") unless $hash_base;
5771         my %co = parse_commit($hash_base)
5772                 or die_error(404, "Commit not found");
5773         my $ftype = "blob";
5774         if (!defined $hash) {
5775                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5776                         or die_error(404, "Error looking up file");
5777         } else {
5778                 $ftype = git_get_type($hash);
5779                 if ($ftype !~ "blob") {
5780                         die_error(400, "Object is not a blob");
5781                 }
5782         }
5783
5784         my $fd;
5785         if ($format eq 'incremental') {
5786                 # get file contents (as base)
5787                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5788                         or die_error(500, "Open git-cat-file failed");
5789         } elsif ($format eq 'data') {
5790                 # run git-blame --incremental
5791                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5792                         $hash_base, "--", $file_name
5793                         or die_error(500, "Open git-blame --incremental failed");
5794         } else {
5795                 # run git-blame --porcelain
5796                 open $fd, "-|", git_cmd(), "blame", '-p',
5797                         $hash_base, '--', $file_name
5798                         or die_error(500, "Open git-blame --porcelain failed");
5799         }
5800
5801         # incremental blame data returns early
5802         if ($format eq 'data') {
5803                 print $cgi->header(
5804                         -type=>"text/plain", -charset => "utf-8",
5805                         -status=> "200 OK");
5806                 local $| = 1; # output autoflush
5807                 print while <$fd>;
5808                 close $fd
5809                         or print "ERROR $!\n";
5810
5811                 print 'END';
5812                 if (defined $t0 && gitweb_check_feature('timed')) {
5813                         print ' '.
5814                               tv_interval($t0, [ gettimeofday() ]).
5815                               ' '.$number_of_git_cmds;
5816                 }
5817                 print "\n";
5818
5819                 return;
5820         }
5821
5822         # page header
5823         git_header_html();
5824         my $formats_nav =
5825                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5826                         "blob") .
5827                 " | ";
5828         if ($format eq 'incremental') {
5829                 $formats_nav .=
5830                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5831                                 "blame") . " (non-incremental)";
5832         } else {
5833                 $formats_nav .=
5834                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5835                                 "blame") . " (incremental)";
5836         }
5837         $formats_nav .=
5838                 " | " .
5839                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5840                         "history") .
5841                 " | " .
5842                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5843                         "HEAD");
5844         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5845         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5846         git_print_page_path($file_name, $ftype, $hash_base);
5847
5848         # page body
5849         if ($format eq 'incremental') {
5850                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5851                       "This page requires JavaScript to run.\n Use ".
5852                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5853                               'this page').
5854                       " instead.\n".
5855                       "</b></center></div>\n</noscript>\n";
5856
5857                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5858         }
5859
5860         print qq!<div class="page_body">\n!;
5861         print qq!<div id="progress_info">... / ...</div>\n!
5862                 if ($format eq 'incremental');
5863         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5864               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5865               qq!<thead>\n!.
5866               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5867               qq!</thead>\n!.
5868               qq!<tbody>\n!;
5869
5870         my @rev_color = qw(light dark);
5871         my $num_colors = scalar(@rev_color);
5872         my $current_color = 0;
5873
5874         if ($format eq 'incremental') {
5875                 my $color_class = $rev_color[$current_color];
5876
5877                 #contents of a file
5878                 my $linenr = 0;
5879         LINE:
5880                 while (my $line = <$fd>) {
5881                         chomp $line;
5882                         $linenr++;
5883
5884                         print qq!<tr id="l$linenr" class="$color_class">!.
5885                               qq!<td class="sha1"><a href=""> </a></td>!.
5886                               qq!<td class="linenr">!.
5887                               qq!<a class="linenr" href="">$linenr</a></td>!;
5888                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5889                         print qq!</tr>\n!;
5890                 }
5891
5892         } else { # porcelain, i.e. ordinary blame
5893                 my %metainfo = (); # saves information about commits
5894
5895                 # blame data
5896         LINE:
5897                 while (my $line = <$fd>) {
5898                         chomp $line;
5899                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5900                         # no <lines in group> for subsequent lines in group of lines
5901                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5902                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5903                         if (!exists $metainfo{$full_rev}) {
5904                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5905                         }
5906                         my $meta = $metainfo{$full_rev};
5907                         my $data;
5908                         while ($data = <$fd>) {
5909                                 chomp $data;
5910                                 last if ($data =~ s/^\t//); # contents of line
5911                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5912                                         $meta->{$1} = $2 unless exists $meta->{$1};
5913                                 }
5914                                 if ($data =~ /^previous /) {
5915                                         $meta->{'nprevious'}++;
5916                                 }
5917                         }
5918                         my $short_rev = substr($full_rev, 0, 8);
5919                         my $author = $meta->{'author'};
5920                         my %date =
5921                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5922                         my $date = $date{'iso-tz'};
5923                         if ($group_size) {
5924                                 $current_color = ($current_color + 1) % $num_colors;
5925                         }
5926                         my $tr_class = $rev_color[$current_color];
5927                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5928                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5929                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5930                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5931                         if ($group_size) {
5932                                 print "<td class=\"sha1\"";
5933                                 print " title=\"". esc_html($author) . ", $date\"";
5934                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5935                                 print ">";
5936                                 print $cgi->a({-href => href(action=>"commit",
5937                                                              hash=>$full_rev,
5938                                                              file_name=>$file_name)},
5939                                               esc_html($short_rev));
5940                                 if ($group_size >= 2) {
5941                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5942                                         if (@author_initials) {
5943                                                 print "<br />" .
5944                                                       esc_html(join('', @author_initials));
5945                                                 #           or join('.', ...)
5946                                         }
5947                                 }
5948                                 print "</td>\n";
5949                         }
5950                         # 'previous' <sha1 of parent commit> <filename at commit>
5951                         if (exists $meta->{'previous'} &&
5952                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5953                                 $meta->{'parent'} = $1;
5954                                 $meta->{'file_parent'} = unquote($2);
5955                         }
5956                         my $linenr_commit =
5957                                 exists($meta->{'parent'}) ?
5958                                 $meta->{'parent'} : $full_rev;
5959                         my $linenr_filename =
5960                                 exists($meta->{'file_parent'}) ?
5961                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5962                         my $blamed = href(action => 'blame',
5963                                           file_name => $linenr_filename,
5964                                           hash_base => $linenr_commit);
5965                         print "<td class=\"linenr\">";
5966                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5967                                         -class => "linenr" },
5968                                       esc_html($lineno));
5969                         print "</td>";
5970                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5971                         print "</tr>\n";
5972                 } # end while
5973
5974         }
5975
5976         # footer
5977         print "</tbody>\n".
5978               "</table>\n"; # class="blame"
5979         print "</div>\n";   # class="blame_body"
5980         close $fd
5981                 or print "Reading blob failed\n";
5982
5983         git_footer_html();
5984 }
5985
5986 sub git_blame {
5987         git_blame_common();
5988 }
5989
5990 sub git_blame_incremental {
5991         git_blame_common('incremental');
5992 }
5993
5994 sub git_blame_data {
5995         git_blame_common('data');
5996 }
5997
5998 sub git_tags {
5999         my $head = git_get_head_hash($project);
6000         git_header_html();
6001         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6002         git_print_header_div('summary', $project);
6003
6004         my @tagslist = git_get_tags_list();
6005         if (@tagslist) {
6006                 git_tags_body(\@tagslist);
6007         }
6008         git_footer_html();
6009 }
6010
6011 sub git_heads {
6012         my $head = git_get_head_hash($project);
6013         git_header_html();
6014         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6015         git_print_header_div('summary', $project);
6016
6017         my @headslist = git_get_heads_list();
6018         if (@headslist) {
6019                 git_heads_body(\@headslist, $head);
6020         }
6021         git_footer_html();
6022 }
6023
6024 # used both for single remote view and for list of all the remotes
6025 sub git_remotes {
6026         gitweb_check_feature('remote_heads')
6027                 or die_error(403, "Remote heads view is disabled");
6028
6029         my $head = git_get_head_hash($project);
6030         my $remote = $input_params{'hash'};
6031
6032         my $remotedata = git_get_remotes_list($remote);
6033         die_error(500, "Unable to get remote information") unless defined $remotedata;
6034
6035         unless (%$remotedata) {
6036                 die_error(404, defined $remote ?
6037                         "Remote $remote not found" :
6038                         "No remotes found");
6039         }
6040
6041         git_header_html(undef, undef, -action_extra => $remote);
6042         git_print_page_nav('', '',  $head, undef, $head,
6043                 format_ref_views($remote ? '' : 'remotes'));
6044
6045         fill_remote_heads($remotedata);
6046         if (defined $remote) {
6047                 git_print_header_div('remotes', "$remote remote for $project");
6048                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6049         } else {
6050                 git_print_header_div('summary', "$project remotes");
6051                 git_remotes_body($remotedata, undef, $head);
6052         }
6053
6054         git_footer_html();
6055 }
6056
6057 sub git_blob_plain {
6058         my $type = shift;
6059         my $expires;
6060
6061         if (!defined $hash) {
6062                 if (defined $file_name) {
6063                         my $base = $hash_base || git_get_head_hash($project);
6064                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6065                                 or die_error(404, "Cannot find file");
6066                 } else {
6067                         die_error(400, "No file name defined");
6068                 }
6069         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6070                 # blobs defined by non-textual hash id's can be cached
6071                 $expires = "+1d";
6072         }
6073
6074         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6075                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6076
6077         # content-type (can include charset)
6078         $type = blob_contenttype($fd, $file_name, $type);
6079
6080         # "save as" filename, even when no $file_name is given
6081         my $save_as = "$hash";
6082         if (defined $file_name) {
6083                 $save_as = $file_name;
6084         } elsif ($type =~ m/^text\//) {
6085                 $save_as .= '.txt';
6086         }
6087
6088         # With XSS prevention on, blobs of all types except a few known safe
6089         # ones are served with "Content-Disposition: attachment" to make sure
6090         # they don't run in our security domain.  For certain image types,
6091         # blob view writes an <img> tag referring to blob_plain view, and we
6092         # want to be sure not to break that by serving the image as an
6093         # attachment (though Firefox 3 doesn't seem to care).
6094         my $sandbox = $prevent_xss &&
6095                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6096
6097         print $cgi->header(
6098                 -type => $type,
6099                 -expires => $expires,
6100                 -content_disposition =>
6101                         ($sandbox ? 'attachment' : 'inline')
6102                         . '; filename="' . $save_as . '"');
6103         local $/ = undef;
6104         binmode STDOUT, ':raw';
6105         print <$fd>;
6106         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6107         close $fd;
6108 }
6109
6110 sub git_blob {
6111         my $expires;
6112
6113         if (!defined $hash) {
6114                 if (defined $file_name) {
6115                         my $base = $hash_base || git_get_head_hash($project);
6116                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6117                                 or die_error(404, "Cannot find file");
6118                 } else {
6119                         die_error(400, "No file name defined");
6120                 }
6121         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6122                 # blobs defined by non-textual hash id's can be cached
6123                 $expires = "+1d";
6124         }
6125
6126         my $have_blame = gitweb_check_feature('blame');
6127         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6128                 or die_error(500, "Couldn't cat $file_name, $hash");
6129         my $mimetype = blob_mimetype($fd, $file_name);
6130         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6131         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6132                 close $fd;
6133                 return git_blob_plain($mimetype);
6134         }
6135         # we can have blame only for text/* mimetype
6136         $have_blame &&= ($mimetype =~ m!^text/!);
6137
6138         my $highlight = gitweb_check_feature('highlight');
6139         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6140         $fd = run_highlighter($fd, $highlight, $syntax)
6141                 if $syntax;
6142
6143         git_header_html(undef, $expires);
6144         my $formats_nav = '';
6145         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6146                 if (defined $file_name) {
6147                         if ($have_blame) {
6148                                 $formats_nav .=
6149                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6150                                                 "blame") .
6151                                         " | ";
6152                         }
6153                         $formats_nav .=
6154                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6155                                         "history") .
6156                                 " | " .
6157                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6158                                         "raw") .
6159                                 " | " .
6160                                 $cgi->a({-href => href(action=>"blob",
6161                                                        hash_base=>"HEAD", file_name=>$file_name)},
6162                                         "HEAD");
6163                 } else {
6164                         $formats_nav .=
6165                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6166                                         "raw");
6167                 }
6168                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6169                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6170         } else {
6171                 print "<div class=\"page_nav\">\n" .
6172                       "<br/><br/></div>\n" .
6173                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6174         }
6175         git_print_page_path($file_name, "blob", $hash_base);
6176         print "<div class=\"page_body\">\n";
6177         if ($mimetype =~ m!^image/!) {
6178                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6179                 if ($file_name) {
6180                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6181                 }
6182                 print qq! src="! .
6183                       href(action=>"blob_plain", hash=>$hash,
6184                            hash_base=>$hash_base, file_name=>$file_name) .
6185                       qq!" />\n!;
6186         } else {
6187                 my $nr;
6188                 while (my $line = <$fd>) {
6189                         chomp $line;
6190                         $nr++;
6191                         $line = untabify($line);
6192                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6193                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6194                 }
6195         }
6196         close $fd
6197                 or print "Reading blob failed.\n";
6198         print "</div>";
6199         git_footer_html();
6200 }
6201
6202 sub git_tree {
6203         if (!defined $hash_base) {
6204                 $hash_base = "HEAD";
6205         }
6206         if (!defined $hash) {
6207                 if (defined $file_name) {
6208                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6209                 } else {
6210                         $hash = $hash_base;
6211                 }
6212         }
6213         die_error(404, "No such tree") unless defined($hash);
6214
6215         my $show_sizes = gitweb_check_feature('show-sizes');
6216         my $have_blame = gitweb_check_feature('blame');
6217
6218         my @entries = ();
6219         {
6220                 local $/ = "\0";
6221                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6222                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6223                         or die_error(500, "Open git-ls-tree failed");
6224                 @entries = map { chomp; $_ } <$fd>;
6225                 close $fd
6226                         or die_error(404, "Reading tree failed");
6227         }
6228
6229         my $refs = git_get_references();
6230         my $ref = format_ref_marker($refs, $hash_base);
6231         git_header_html();
6232         my $basedir = '';
6233         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6234                 my @views_nav = ();
6235                 if (defined $file_name) {
6236                         push @views_nav,
6237                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6238                                         "history"),
6239                                 $cgi->a({-href => href(action=>"tree",
6240                                                        hash_base=>"HEAD", file_name=>$file_name)},
6241                                         "HEAD"),
6242                 }
6243                 my $snapshot_links = format_snapshot_links($hash);
6244                 if (defined $snapshot_links) {
6245                         # FIXME: Should be available when we have no hash base as well.
6246                         push @views_nav, $snapshot_links;
6247                 }
6248                 git_print_page_nav('tree','', $hash_base, undef, undef,
6249                                    join(' | ', @views_nav));
6250                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6251         } else {
6252                 undef $hash_base;
6253                 print "<div class=\"page_nav\">\n";
6254                 print "<br/><br/></div>\n";
6255                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6256         }
6257         if (defined $file_name) {
6258                 $basedir = $file_name;
6259                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6260                         $basedir .= '/';
6261                 }
6262                 git_print_page_path($file_name, 'tree', $hash_base);
6263         }
6264         print "<div class=\"page_body\">\n";
6265         print "<table class=\"tree\">\n";
6266         my $alternate = 1;
6267         # '..' (top directory) link if possible
6268         if (defined $hash_base &&
6269             defined $file_name && $file_name =~ m![^/]+$!) {
6270                 if ($alternate) {
6271                         print "<tr class=\"dark\">\n";
6272                 } else {
6273                         print "<tr class=\"light\">\n";
6274                 }
6275                 $alternate ^= 1;
6276
6277                 my $up = $file_name;
6278                 $up =~ s!/?[^/]+$!!;
6279                 undef $up unless $up;
6280                 # based on git_print_tree_entry
6281                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6282                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6283                 print '<td class="list">';
6284                 print $cgi->a({-href => href(action=>"tree",
6285                                              hash_base=>$hash_base,
6286                                              file_name=>$up)},
6287                               "..");
6288                 print "</td>\n";
6289                 print "<td class=\"link\"></td>\n";
6290
6291                 print "</tr>\n";
6292         }
6293         foreach my $line (@entries) {
6294                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6295
6296                 if ($alternate) {
6297                         print "<tr class=\"dark\">\n";
6298                 } else {
6299                         print "<tr class=\"light\">\n";
6300                 }
6301                 $alternate ^= 1;
6302
6303                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6304
6305                 print "</tr>\n";
6306         }
6307         print "</table>\n" .
6308               "</div>";
6309         git_footer_html();
6310 }
6311
6312 sub snapshot_name {
6313         my ($project, $hash) = @_;
6314
6315         # path/to/project.git  -> project
6316         # path/to/project/.git -> project
6317         my $name = to_utf8($project);
6318         $name =~ s,([^/])/*\.git$,$1,;
6319         $name = basename($name);
6320         # sanitize name
6321         $name =~ s/[[:cntrl:]]/?/g;
6322
6323         my $ver = $hash;
6324         if ($hash =~ /^[0-9a-fA-F]+$/) {
6325                 # shorten SHA-1 hash
6326                 my $full_hash = git_get_full_hash($project, $hash);
6327                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6328                         $ver = git_get_short_hash($project, $hash);
6329                 }
6330         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6331                 # tags don't need shortened SHA-1 hash
6332                 $ver = $1;
6333         } else {
6334                 # branches and other need shortened SHA-1 hash
6335                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6336                         $ver = $1;
6337                 }
6338                 $ver .= '-' . git_get_short_hash($project, $hash);
6339         }
6340         # in case of hierarchical branch names
6341         $ver =~ s!/!.!g;
6342
6343         # name = project-version_string
6344         $name = "$name-$ver";
6345
6346         return wantarray ? ($name, $name) : $name;
6347 }
6348
6349 sub git_snapshot {
6350         my $format = $input_params{'snapshot_format'};
6351         if (!@snapshot_fmts) {
6352                 die_error(403, "Snapshots not allowed");
6353         }
6354         # default to first supported snapshot format
6355         $format ||= $snapshot_fmts[0];
6356         if ($format !~ m/^[a-z0-9]+$/) {
6357                 die_error(400, "Invalid snapshot format parameter");
6358         } elsif (!exists($known_snapshot_formats{$format})) {
6359                 die_error(400, "Unknown snapshot format");
6360         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6361                 die_error(403, "Snapshot format not allowed");
6362         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6363                 die_error(403, "Unsupported snapshot format");
6364         }
6365
6366         my $type = git_get_type("$hash^{}");
6367         if (!$type) {
6368                 die_error(404, 'Object does not exist');
6369         }  elsif ($type eq 'blob') {
6370                 die_error(400, 'Object is not a tree-ish');
6371         }
6372
6373         my ($name, $prefix) = snapshot_name($project, $hash);
6374         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6375         my $cmd = quote_command(
6376                 git_cmd(), 'archive',
6377                 "--format=$known_snapshot_formats{$format}{'format'}",
6378                 "--prefix=$prefix/", $hash);
6379         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6380                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6381         }
6382
6383         $filename =~ s/(["\\])/\\$1/g;
6384         print $cgi->header(
6385                 -type => $known_snapshot_formats{$format}{'type'},
6386                 -content_disposition => 'inline; filename="' . $filename . '"',
6387                 -status => '200 OK');
6388
6389         open my $fd, "-|", $cmd
6390                 or die_error(500, "Execute git-archive failed");
6391         binmode STDOUT, ':raw';
6392         print <$fd>;
6393         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6394         close $fd;
6395 }
6396
6397 sub git_log_generic {
6398         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6399
6400         my $head = git_get_head_hash($project);
6401         if (!defined $base) {
6402                 $base = $head;
6403         }
6404         if (!defined $page) {
6405                 $page = 0;
6406         }
6407         my $refs = git_get_references();
6408
6409         my $commit_hash = $base;
6410         if (defined $parent) {
6411                 $commit_hash = "$parent..$base";
6412         }
6413         my @commitlist =
6414                 parse_commits($commit_hash, 101, (100 * $page),
6415                               defined $file_name ? ($file_name, "--full-history") : ());
6416
6417         my $ftype;
6418         if (!defined $file_hash && defined $file_name) {
6419                 # some commits could have deleted file in question,
6420                 # and not have it in tree, but one of them has to have it
6421                 for (my $i = 0; $i < @commitlist; $i++) {
6422                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6423                         last if defined $file_hash;
6424                 }
6425         }
6426         if (defined $file_hash) {
6427                 $ftype = git_get_type($file_hash);
6428         }
6429         if (defined $file_name && !defined $ftype) {
6430                 die_error(500, "Unknown type of object");
6431         }
6432         my %co;
6433         if (defined $file_name) {
6434                 %co = parse_commit($base)
6435                         or die_error(404, "Unknown commit object");
6436         }
6437
6438
6439         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6440         my $next_link = '';
6441         if ($#commitlist >= 100) {
6442                 $next_link =
6443                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6444                                  -accesskey => "n", -title => "Alt-n"}, "next");
6445         }
6446         my $patch_max = gitweb_get_feature('patches');
6447         if ($patch_max && !defined $file_name) {
6448                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6449                         $paging_nav .= " &sdot; " .
6450                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6451                                         "patches");
6452                 }
6453         }
6454
6455         git_header_html();
6456         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6457         if (defined $file_name) {
6458                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6459         } else {
6460                 git_print_header_div('summary', $project)
6461         }
6462         git_print_page_path($file_name, $ftype, $hash_base)
6463                 if (defined $file_name);
6464
6465         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6466                      $file_name, $file_hash, $ftype);
6467
6468         git_footer_html();
6469 }
6470
6471 sub git_log {
6472         git_log_generic('log', \&git_log_body,
6473                         $hash, $hash_parent);
6474 }
6475
6476 sub git_commit {
6477         $hash ||= $hash_base || "HEAD";
6478         my %co = parse_commit($hash)
6479             or die_error(404, "Unknown commit object");
6480
6481         my $parent  = $co{'parent'};
6482         my $parents = $co{'parents'}; # listref
6483
6484         # we need to prepare $formats_nav before any parameter munging
6485         my $formats_nav;
6486         if (!defined $parent) {
6487                 # --root commitdiff
6488                 $formats_nav .= '(initial)';
6489         } elsif (@$parents == 1) {
6490                 # single parent commit
6491                 $formats_nav .=
6492                         '(parent: ' .
6493                         $cgi->a({-href => href(action=>"commit",
6494                                                hash=>$parent)},
6495                                 esc_html(substr($parent, 0, 7))) .
6496                         ')';
6497         } else {
6498                 # merge commit
6499                 $formats_nav .=
6500                         '(merge: ' .
6501                         join(' ', map {
6502                                 $cgi->a({-href => href(action=>"commit",
6503                                                        hash=>$_)},
6504                                         esc_html(substr($_, 0, 7)));
6505                         } @$parents ) .
6506                         ')';
6507         }
6508         if (gitweb_check_feature('patches') && @$parents <= 1) {
6509                 $formats_nav .= " | " .
6510                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6511                                 "patch");
6512         }
6513
6514         if (!defined $parent) {
6515                 $parent = "--root";
6516         }
6517         my @difftree;
6518         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6519                 @diff_opts,
6520                 (@$parents <= 1 ? $parent : '-c'),
6521                 $hash, "--"
6522                 or die_error(500, "Open git-diff-tree failed");
6523         @difftree = map { chomp; $_ } <$fd>;
6524         close $fd or die_error(404, "Reading git-diff-tree failed");
6525
6526         # non-textual hash id's can be cached
6527         my $expires;
6528         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6529                 $expires = "+1d";
6530         }
6531         my $refs = git_get_references();
6532         my $ref = format_ref_marker($refs, $co{'id'});
6533
6534         git_header_html(undef, $expires);
6535         git_print_page_nav('commit', '',
6536                            $hash, $co{'tree'}, $hash,
6537                            $formats_nav);
6538
6539         if (defined $co{'parent'}) {
6540                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6541         } else {
6542                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6543         }
6544         print "<div class=\"title_text\">\n" .
6545               "<table class=\"object_header\">\n";
6546         git_print_authorship_rows(\%co);
6547         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6548         print "<tr>" .
6549               "<td>tree</td>" .
6550               "<td class=\"sha1\">" .
6551               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6552                        class => "list"}, $co{'tree'}) .
6553               "</td>" .
6554               "<td class=\"link\">" .
6555               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6556                       "tree");
6557         my $snapshot_links = format_snapshot_links($hash);
6558         if (defined $snapshot_links) {
6559                 print " | " . $snapshot_links;
6560         }
6561         print "</td>" .
6562               "</tr>\n";
6563
6564         foreach my $par (@$parents) {
6565                 print "<tr>" .
6566                       "<td>parent</td>" .
6567                       "<td class=\"sha1\">" .
6568                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6569                                class => "list"}, $par) .
6570                       "</td>" .
6571                       "<td class=\"link\">" .
6572                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6573                       " | " .
6574                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6575                       "</td>" .
6576                       "</tr>\n";
6577         }
6578         print "</table>".
6579               "</div>\n";
6580
6581         print "<div class=\"page_body\">\n";
6582         git_print_log($co{'comment'});
6583         print "</div>\n";
6584
6585         git_difftree_body(\@difftree, $hash, @$parents);
6586
6587         git_footer_html();
6588 }
6589
6590 sub git_object {
6591         # object is defined by:
6592         # - hash or hash_base alone
6593         # - hash_base and file_name
6594         my $type;
6595
6596         # - hash or hash_base alone
6597         if ($hash || ($hash_base && !defined $file_name)) {
6598                 my $object_id = $hash || $hash_base;
6599
6600                 open my $fd, "-|", quote_command(
6601                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6602                         or die_error(404, "Object does not exist");
6603                 $type = <$fd>;
6604                 chomp $type;
6605                 close $fd
6606                         or die_error(404, "Object does not exist");
6607
6608         # - hash_base and file_name
6609         } elsif ($hash_base && defined $file_name) {
6610                 $file_name =~ s,/+$,,;
6611
6612                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6613                         or die_error(404, "Base object does not exist");
6614
6615                 # here errors should not hapen
6616                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6617                         or die_error(500, "Open git-ls-tree failed");
6618                 my $line = <$fd>;
6619                 close $fd;
6620
6621                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6622                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6623                         die_error(404, "File or directory for given base does not exist");
6624                 }
6625                 $type = $2;
6626                 $hash = $3;
6627         } else {
6628                 die_error(400, "Not enough information to find object");
6629         }
6630
6631         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6632                                           hash=>$hash, hash_base=>$hash_base,
6633                                           file_name=>$file_name),
6634                              -status => '302 Found');
6635 }
6636
6637 sub git_blobdiff {
6638         my $format = shift || 'html';
6639
6640         my $fd;
6641         my @difftree;
6642         my %diffinfo;
6643         my $expires;
6644
6645         # preparing $fd and %diffinfo for git_patchset_body
6646         # new style URI
6647         if (defined $hash_base && defined $hash_parent_base) {
6648                 if (defined $file_name) {
6649                         # read raw output
6650                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6651                                 $hash_parent_base, $hash_base,
6652                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6653                                 or die_error(500, "Open git-diff-tree failed");
6654                         @difftree = map { chomp; $_ } <$fd>;
6655                         close $fd
6656                                 or die_error(404, "Reading git-diff-tree failed");
6657                         @difftree
6658                                 or die_error(404, "Blob diff not found");
6659
6660                 } elsif (defined $hash &&
6661                          $hash =~ /[0-9a-fA-F]{40}/) {
6662                         # try to find filename from $hash
6663
6664                         # read filtered raw output
6665                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6666                                 $hash_parent_base, $hash_base, "--"
6667                                 or die_error(500, "Open git-diff-tree failed");
6668                         @difftree =
6669                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6670                                 # $hash == to_id
6671                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6672                                 map { chomp; $_ } <$fd>;
6673                         close $fd
6674                                 or die_error(404, "Reading git-diff-tree failed");
6675                         @difftree
6676                                 or die_error(404, "Blob diff not found");
6677
6678                 } else {
6679                         die_error(400, "Missing one of the blob diff parameters");
6680                 }
6681
6682                 if (@difftree > 1) {
6683                         die_error(400, "Ambiguous blob diff specification");
6684                 }
6685
6686                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6687                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6688                 $file_name   ||= $diffinfo{'to_file'};
6689
6690                 $hash_parent ||= $diffinfo{'from_id'};
6691                 $hash        ||= $diffinfo{'to_id'};
6692
6693                 # non-textual hash id's can be cached
6694                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6695                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6696                         $expires = '+1d';
6697                 }
6698
6699                 # open patch output
6700                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6701                         '-p', ($format eq 'html' ? "--full-index" : ()),
6702                         $hash_parent_base, $hash_base,
6703                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6704                         or die_error(500, "Open git-diff-tree failed");
6705         }
6706
6707         # old/legacy style URI -- not generated anymore since 1.4.3.
6708         if (!%diffinfo) {
6709                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6710         }
6711
6712         # header
6713         if ($format eq 'html') {
6714                 my $formats_nav =
6715                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6716                                 "raw");
6717                 git_header_html(undef, $expires);
6718                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6719                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6720                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6721                 } else {
6722                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6723                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6724                 }
6725                 if (defined $file_name) {
6726                         git_print_page_path($file_name, "blob", $hash_base);
6727                 } else {
6728                         print "<div class=\"page_path\"></div>\n";
6729                 }
6730
6731         } elsif ($format eq 'plain') {
6732                 print $cgi->header(
6733                         -type => 'text/plain',
6734                         -charset => 'utf-8',
6735                         -expires => $expires,
6736                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6737
6738                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6739
6740         } else {
6741                 die_error(400, "Unknown blobdiff format");
6742         }
6743
6744         # patch
6745         if ($format eq 'html') {
6746                 print "<div class=\"page_body\">\n";
6747
6748                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6749                 close $fd;
6750
6751                 print "</div>\n"; # class="page_body"
6752                 git_footer_html();
6753
6754         } else {
6755                 while (my $line = <$fd>) {
6756                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6757                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6758
6759                         print $line;
6760
6761                         last if $line =~ m!^\+\+\+!;
6762                 }
6763                 local $/ = undef;
6764                 print <$fd>;
6765                 close $fd;
6766         }
6767 }
6768
6769 sub git_blobdiff_plain {
6770         git_blobdiff('plain');
6771 }
6772
6773 sub git_commitdiff {
6774         my %params = @_;
6775         my $format = $params{-format} || 'html';
6776
6777         my ($patch_max) = gitweb_get_feature('patches');
6778         if ($format eq 'patch') {
6779                 die_error(403, "Patch view not allowed") unless $patch_max;
6780         }
6781
6782         $hash ||= $hash_base || "HEAD";
6783         my %co = parse_commit($hash)
6784             or die_error(404, "Unknown commit object");
6785
6786         # choose format for commitdiff for merge
6787         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6788                 $hash_parent = '--cc';
6789         }
6790         # we need to prepare $formats_nav before almost any parameter munging
6791         my $formats_nav;
6792         if ($format eq 'html') {
6793                 $formats_nav =
6794                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6795                                 "raw");
6796                 if ($patch_max && @{$co{'parents'}} <= 1) {
6797                         $formats_nav .= " | " .
6798                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6799                                         "patch");
6800                 }
6801
6802                 if (defined $hash_parent &&
6803                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6804                         # commitdiff with two commits given
6805                         my $hash_parent_short = $hash_parent;
6806                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6807                                 $hash_parent_short = substr($hash_parent, 0, 7);
6808                         }
6809                         $formats_nav .=
6810                                 ' (from';
6811                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6812                                 if ($co{'parents'}[$i] eq $hash_parent) {
6813                                         $formats_nav .= ' parent ' . ($i+1);
6814                                         last;
6815                                 }
6816                         }
6817                         $formats_nav .= ': ' .
6818                                 $cgi->a({-href => href(action=>"commitdiff",
6819                                                        hash=>$hash_parent)},
6820                                         esc_html($hash_parent_short)) .
6821                                 ')';
6822                 } elsif (!$co{'parent'}) {
6823                         # --root commitdiff
6824                         $formats_nav .= ' (initial)';
6825                 } elsif (scalar @{$co{'parents'}} == 1) {
6826                         # single parent commit
6827                         $formats_nav .=
6828                                 ' (parent: ' .
6829                                 $cgi->a({-href => href(action=>"commitdiff",
6830                                                        hash=>$co{'parent'})},
6831                                         esc_html(substr($co{'parent'}, 0, 7))) .
6832                                 ')';
6833                 } else {
6834                         # merge commit
6835                         if ($hash_parent eq '--cc') {
6836                                 $formats_nav .= ' | ' .
6837                                         $cgi->a({-href => href(action=>"commitdiff",
6838                                                                hash=>$hash, hash_parent=>'-c')},
6839                                                 'combined');
6840                         } else { # $hash_parent eq '-c'
6841                                 $formats_nav .= ' | ' .
6842                                         $cgi->a({-href => href(action=>"commitdiff",
6843                                                                hash=>$hash, hash_parent=>'--cc')},
6844                                                 'compact');
6845                         }
6846                         $formats_nav .=
6847                                 ' (merge: ' .
6848                                 join(' ', map {
6849                                         $cgi->a({-href => href(action=>"commitdiff",
6850                                                                hash=>$_)},
6851                                                 esc_html(substr($_, 0, 7)));
6852                                 } @{$co{'parents'}} ) .
6853                                 ')';
6854                 }
6855         }
6856
6857         my $hash_parent_param = $hash_parent;
6858         if (!defined $hash_parent_param) {
6859                 # --cc for multiple parents, --root for parentless
6860                 $hash_parent_param =
6861                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6862         }
6863
6864         # read commitdiff
6865         my $fd;
6866         my @difftree;
6867         if ($format eq 'html') {
6868                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6869                         "--no-commit-id", "--patch-with-raw", "--full-index",
6870                         $hash_parent_param, $hash, "--"
6871                         or die_error(500, "Open git-diff-tree failed");
6872
6873                 while (my $line = <$fd>) {
6874                         chomp $line;
6875                         # empty line ends raw part of diff-tree output
6876                         last unless $line;
6877                         push @difftree, scalar parse_difftree_raw_line($line);
6878                 }
6879
6880         } elsif ($format eq 'plain') {
6881                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6882                         '-p', $hash_parent_param, $hash, "--"
6883                         or die_error(500, "Open git-diff-tree failed");
6884         } elsif ($format eq 'patch') {
6885                 # For commit ranges, we limit the output to the number of
6886                 # patches specified in the 'patches' feature.
6887                 # For single commits, we limit the output to a single patch,
6888                 # diverging from the git-format-patch default.
6889                 my @commit_spec = ();
6890                 if ($hash_parent) {
6891                         if ($patch_max > 0) {
6892                                 push @commit_spec, "-$patch_max";
6893                         }
6894                         push @commit_spec, '-n', "$hash_parent..$hash";
6895                 } else {
6896                         if ($params{-single}) {
6897                                 push @commit_spec, '-1';
6898                         } else {
6899                                 if ($patch_max > 0) {
6900                                         push @commit_spec, "-$patch_max";
6901                                 }
6902                                 push @commit_spec, "-n";
6903                         }
6904                         push @commit_spec, '--root', $hash;
6905                 }
6906                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6907                         '--encoding=utf8', '--stdout', @commit_spec
6908                         or die_error(500, "Open git-format-patch failed");
6909         } else {
6910                 die_error(400, "Unknown commitdiff format");
6911         }
6912
6913         # non-textual hash id's can be cached
6914         my $expires;
6915         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6916                 $expires = "+1d";
6917         }
6918
6919         # write commit message
6920         if ($format eq 'html') {
6921                 my $refs = git_get_references();
6922                 my $ref = format_ref_marker($refs, $co{'id'});
6923
6924                 git_header_html(undef, $expires);
6925                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6926                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6927                 print "<div class=\"title_text\">\n" .
6928                       "<table class=\"object_header\">\n";
6929                 git_print_authorship_rows(\%co);
6930                 print "</table>".
6931                       "</div>\n";
6932                 print "<div class=\"page_body\">\n";
6933                 if (@{$co{'comment'}} > 1) {
6934                         print "<div class=\"log\">\n";
6935                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6936                         print "</div>\n"; # class="log"
6937                 }
6938
6939         } elsif ($format eq 'plain') {
6940                 my $refs = git_get_references("tags");
6941                 my $tagname = git_get_rev_name_tags($hash);
6942                 my $filename = basename($project) . "-$hash.patch";
6943
6944                 print $cgi->header(
6945                         -type => 'text/plain',
6946                         -charset => 'utf-8',
6947                         -expires => $expires,
6948                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6949                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6950                 print "From: " . to_utf8($co{'author'}) . "\n";
6951                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6952                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6953
6954                 print "X-Git-Tag: $tagname\n" if $tagname;
6955                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6956
6957                 foreach my $line (@{$co{'comment'}}) {
6958                         print to_utf8($line) . "\n";
6959                 }
6960                 print "---\n\n";
6961         } elsif ($format eq 'patch') {
6962                 my $filename = basename($project) . "-$hash.patch";
6963
6964                 print $cgi->header(
6965                         -type => 'text/plain',
6966                         -charset => 'utf-8',
6967                         -expires => $expires,
6968                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6969         }
6970
6971         # write patch
6972         if ($format eq 'html') {
6973                 my $use_parents = !defined $hash_parent ||
6974                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6975                 git_difftree_body(\@difftree, $hash,
6976                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6977                 print "<br/>\n";
6978
6979                 git_patchset_body($fd, \@difftree, $hash,
6980                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6981                 close $fd;
6982                 print "</div>\n"; # class="page_body"
6983                 git_footer_html();
6984
6985         } elsif ($format eq 'plain') {
6986                 local $/ = undef;
6987                 print <$fd>;
6988                 close $fd
6989                         or print "Reading git-diff-tree failed\n";
6990         } elsif ($format eq 'patch') {
6991                 local $/ = undef;
6992                 print <$fd>;
6993                 close $fd
6994                         or print "Reading git-format-patch failed\n";
6995         }
6996 }
6997
6998 sub git_commitdiff_plain {
6999         git_commitdiff(-format => 'plain');
7000 }
7001
7002 # format-patch-style patches
7003 sub git_patch {
7004         git_commitdiff(-format => 'patch', -single => 1);
7005 }
7006
7007 sub git_patches {
7008         git_commitdiff(-format => 'patch');
7009 }
7010
7011 sub git_history {
7012         git_log_generic('history', \&git_history_body,
7013                         $hash_base, $hash_parent_base,
7014                         $file_name, $hash);
7015 }
7016
7017 sub git_search {
7018         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7019         if (!defined $searchtext) {
7020                 die_error(400, "Text field is empty");
7021         }
7022         if (!defined $hash) {
7023                 $hash = git_get_head_hash($project);
7024         }
7025         my %co = parse_commit($hash);
7026         if (!%co) {
7027                 die_error(404, "Unknown commit object");
7028         }
7029         if (!defined $page) {
7030                 $page = 0;
7031         }
7032
7033         $searchtype ||= 'commit';
7034         if ($searchtype eq 'pickaxe') {
7035                 # pickaxe may take all resources of your box and run for several minutes
7036                 # with every query - so decide by yourself how public you make this feature
7037                 gitweb_check_feature('pickaxe')
7038                     or die_error(403, "Pickaxe is disabled");
7039         }
7040         if ($searchtype eq 'grep') {
7041                 gitweb_check_feature('grep')[0]
7042                     or die_error(403, "Grep is disabled");
7043         }
7044
7045         git_header_html();
7046
7047         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7048                 my $greptype;
7049                 if ($searchtype eq 'commit') {
7050                         $greptype = "--grep=";
7051                 } elsif ($searchtype eq 'author') {
7052                         $greptype = "--author=";
7053                 } elsif ($searchtype eq 'committer') {
7054                         $greptype = "--committer=";
7055                 }
7056                 $greptype .= $searchtext;
7057                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7058                                                $greptype, '--regexp-ignore-case',
7059                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7060
7061                 my $paging_nav = '';
7062                 if ($page > 0) {
7063                         $paging_nav .=
7064                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7065                                                        searchtext=>$searchtext,
7066                                                        searchtype=>$searchtype)},
7067                                         "first");
7068                         $paging_nav .= " &sdot; " .
7069                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7070                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7071                 } else {
7072                         $paging_nav .= "first";
7073                         $paging_nav .= " &sdot; prev";
7074                 }
7075                 my $next_link = '';
7076                 if ($#commitlist >= 100) {
7077                         $next_link =
7078                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7079                                          -accesskey => "n", -title => "Alt-n"}, "next");
7080                         $paging_nav .= " &sdot; $next_link";
7081                 } else {
7082                         $paging_nav .= " &sdot; next";
7083                 }
7084
7085                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7086                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7087                 if ($page == 0 && !@commitlist) {
7088                         print "<p>No match.</p>\n";
7089                 } else {
7090                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7091                 }
7092         }
7093
7094         if ($searchtype eq 'pickaxe') {
7095                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7096                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7097
7098                 print "<table class=\"pickaxe search\">\n";
7099                 my $alternate = 1;
7100                 local $/ = "\n";
7101                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7102                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7103                         ($search_use_regexp ? '--pickaxe-regex' : ());
7104                 undef %co;
7105                 my @files;
7106                 while (my $line = <$fd>) {
7107                         chomp $line;
7108                         next unless $line;
7109
7110                         my %set = parse_difftree_raw_line($line);
7111                         if (defined $set{'commit'}) {
7112                                 # finish previous commit
7113                                 if (%co) {
7114                                         print "</td>\n" .
7115                                               "<td class=\"link\">" .
7116                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7117                                               " | " .
7118                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7119                                         print "</td>\n" .
7120                                               "</tr>\n";
7121                                 }
7122
7123                                 if ($alternate) {
7124                                         print "<tr class=\"dark\">\n";
7125                                 } else {
7126                                         print "<tr class=\"light\">\n";
7127                                 }
7128                                 $alternate ^= 1;
7129                                 %co = parse_commit($set{'commit'});
7130                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7131                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7132                                       "<td><i>$author</i></td>\n" .
7133                                       "<td>" .
7134                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7135                                               -class => "list subject"},
7136                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7137                         } elsif (defined $set{'to_id'}) {
7138                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7139
7140                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7141                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7142                                               -class => "list"},
7143                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7144                                       "<br/>\n";
7145                         }
7146                 }
7147                 close $fd;
7148
7149                 # finish last commit (warning: repetition!)
7150                 if (%co) {
7151                         print "</td>\n" .
7152                               "<td class=\"link\">" .
7153                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7154                               " | " .
7155                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7156                         print "</td>\n" .
7157                               "</tr>\n";
7158                 }
7159
7160                 print "</table>\n";
7161         }
7162
7163         if ($searchtype eq 'grep') {
7164                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7165                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7166
7167                 print "<table class=\"grep_search\">\n";
7168                 my $alternate = 1;
7169                 my $matches = 0;
7170                 local $/ = "\n";
7171                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7172                         $search_use_regexp ? ('-E', '-i') : '-F',
7173                         $searchtext, $co{'tree'};
7174                 my $lastfile = '';
7175                 while (my $line = <$fd>) {
7176                         chomp $line;
7177                         my ($file, $lno, $ltext, $binary);
7178                         last if ($matches++ > 1000);
7179                         if ($line =~ /^Binary file (.+) matches$/) {
7180                                 $file = $1;
7181                                 $binary = 1;
7182                         } else {
7183                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7184                         }
7185                         if ($file ne $lastfile) {
7186                                 $lastfile and print "</td></tr>\n";
7187                                 if ($alternate++) {
7188                                         print "<tr class=\"dark\">\n";
7189                                 } else {
7190                                         print "<tr class=\"light\">\n";
7191                                 }
7192                                 print "<td class=\"list\">".
7193                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7194                                                                file_name=>"$file"),
7195                                                 -class => "list"}, esc_path($file));
7196                                 print "</td><td>\n";
7197                                 $lastfile = $file;
7198                         }
7199                         if ($binary) {
7200                                 print "<div class=\"binary\">Binary file</div>\n";
7201                         } else {
7202                                 $ltext = untabify($ltext);
7203                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7204                                         $ltext = esc_html($1, -nbsp=>1);
7205                                         $ltext .= '<span class="match">';
7206                                         $ltext .= esc_html($2, -nbsp=>1);
7207                                         $ltext .= '</span>';
7208                                         $ltext .= esc_html($3, -nbsp=>1);
7209                                 } else {
7210                                         $ltext = esc_html($ltext, -nbsp=>1);
7211                                 }
7212                                 print "<div class=\"pre\">" .
7213                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7214                                                                file_name=>"$file").'#l'.$lno,
7215                                                 -class => "linenr"}, sprintf('%4i', $lno))
7216                                         . ' ' .  $ltext . "</div>\n";
7217                         }
7218                 }
7219                 if ($lastfile) {
7220                         print "</td></tr>\n";
7221                         if ($matches > 1000) {
7222                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7223                         }
7224                 } else {
7225                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7226                 }
7227                 close $fd;
7228
7229                 print "</table>\n";
7230         }
7231         git_footer_html();
7232 }
7233
7234 sub git_search_help {
7235         git_header_html();
7236         git_print_page_nav('','', $hash,$hash,$hash);
7237         print <<EOT;
7238 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7239 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7240 the pattern entered is recognized as the POSIX extended
7241 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7242 insensitive).</p>
7243 <dl>
7244 <dt><b>commit</b></dt>
7245 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7246 EOT
7247         my $have_grep = gitweb_check_feature('grep');
7248         if ($have_grep) {
7249                 print <<EOT;
7250 <dt><b>grep</b></dt>
7251 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7252     a different one) are searched for the given pattern. On large trees, this search can take
7253 a while and put some strain on the server, so please use it with some consideration. Note that
7254 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7255 case-sensitive.</dd>
7256 EOT
7257         }
7258         print <<EOT;
7259 <dt><b>author</b></dt>
7260 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7261 <dt><b>committer</b></dt>
7262 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7263 EOT
7264         my $have_pickaxe = gitweb_check_feature('pickaxe');
7265         if ($have_pickaxe) {
7266                 print <<EOT;
7267 <dt><b>pickaxe</b></dt>
7268 <dd>All commits that caused the string to appear or disappear from any file (changes that
7269 added, removed or "modified" the string) will be listed. This search can take a while and
7270 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7271 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7272 EOT
7273         }
7274         print "</dl>\n";
7275         git_footer_html();
7276 }
7277
7278 sub git_shortlog {
7279         git_log_generic('shortlog', \&git_shortlog_body,
7280                         $hash, $hash_parent);
7281 }
7282
7283 ## ......................................................................
7284 ## feeds (RSS, Atom; OPML)
7285
7286 sub git_feed {
7287         my $format = shift || 'atom';
7288         my $have_blame = gitweb_check_feature('blame');
7289
7290         # Atom: http://www.atomenabled.org/developers/syndication/
7291         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7292         if ($format ne 'rss' && $format ne 'atom') {
7293                 die_error(400, "Unknown web feed format");
7294         }
7295
7296         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7297         my $head = $hash || 'HEAD';
7298         my @commitlist = parse_commits($head, 150, 0, $file_name);
7299
7300         my %latest_commit;
7301         my %latest_date;
7302         my $content_type = "application/$format+xml";
7303         if (defined $cgi->http('HTTP_ACCEPT') &&
7304                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7305                 # browser (feed reader) prefers text/xml
7306                 $content_type = 'text/xml';
7307         }
7308         if (defined($commitlist[0])) {
7309                 %latest_commit = %{$commitlist[0]};
7310                 my $latest_epoch = $latest_commit{'committer_epoch'};
7311                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7312                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7313                 if (defined $if_modified) {
7314                         my $since;
7315                         if (eval { require HTTP::Date; 1; }) {
7316                                 $since = HTTP::Date::str2time($if_modified);
7317                         } elsif (eval { require Time::ParseDate; 1; }) {
7318                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7319                         }
7320                         if (defined $since && $latest_epoch <= $since) {
7321                                 print $cgi->header(
7322                                         -type => $content_type,
7323                                         -charset => 'utf-8',
7324                                         -last_modified => $latest_date{'rfc2822'},
7325                                         -status => '304 Not Modified');
7326                                 return;
7327                         }
7328                 }
7329                 print $cgi->header(
7330                         -type => $content_type,
7331                         -charset => 'utf-8',
7332                         -last_modified => $latest_date{'rfc2822'});
7333         } else {
7334                 print $cgi->header(
7335                         -type => $content_type,
7336                         -charset => 'utf-8');
7337         }
7338
7339         # Optimization: skip generating the body if client asks only
7340         # for Last-Modified date.
7341         return if ($cgi->request_method() eq 'HEAD');
7342
7343         # header variables
7344         my $title = "$site_name - $project/$action";
7345         my $feed_type = 'log';
7346         if (defined $hash) {
7347                 $title .= " - '$hash'";
7348                 $feed_type = 'branch log';
7349                 if (defined $file_name) {
7350                         $title .= " :: $file_name";
7351                         $feed_type = 'history';
7352                 }
7353         } elsif (defined $file_name) {
7354                 $title .= " - $file_name";
7355                 $feed_type = 'history';
7356         }
7357         $title .= " $feed_type";
7358         my $descr = git_get_project_description($project);
7359         if (defined $descr) {
7360                 $descr = esc_html($descr);
7361         } else {
7362                 $descr = "$project " .
7363                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7364                          " feed";
7365         }
7366         my $owner = git_get_project_owner($project);
7367         $owner = esc_html($owner);
7368
7369         #header
7370         my $alt_url;
7371         if (defined $file_name) {
7372                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7373         } elsif (defined $hash) {
7374                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7375         } else {
7376                 $alt_url = href(-full=>1, action=>"summary");
7377         }
7378         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7379         if ($format eq 'rss') {
7380                 print <<XML;
7381 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7382 <channel>
7383 XML
7384                 print "<title>$title</title>\n" .
7385                       "<link>$alt_url</link>\n" .
7386                       "<description>$descr</description>\n" .
7387                       "<language>en</language>\n" .
7388                       # project owner is responsible for 'editorial' content
7389                       "<managingEditor>$owner</managingEditor>\n";
7390                 if (defined $logo || defined $favicon) {
7391                         # prefer the logo to the favicon, since RSS
7392                         # doesn't allow both
7393                         my $img = esc_url($logo || $favicon);
7394                         print "<image>\n" .
7395                               "<url>$img</url>\n" .
7396                               "<title>$title</title>\n" .
7397                               "<link>$alt_url</link>\n" .
7398                               "</image>\n";
7399                 }
7400                 if (%latest_date) {
7401                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7402                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7403                 }
7404                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7405         } elsif ($format eq 'atom') {
7406                 print <<XML;
7407 <feed xmlns="http://www.w3.org/2005/Atom">
7408 XML
7409                 print "<title>$title</title>\n" .
7410                       "<subtitle>$descr</subtitle>\n" .
7411                       '<link rel="alternate" type="text/html" href="' .
7412                       $alt_url . '" />' . "\n" .
7413                       '<link rel="self" type="' . $content_type . '" href="' .
7414                       $cgi->self_url() . '" />' . "\n" .
7415                       "<id>" . href(-full=>1) . "</id>\n" .
7416                       # use project owner for feed author
7417                       "<author><name>$owner</name></author>\n";
7418                 if (defined $favicon) {
7419                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7420                 }
7421                 if (defined $logo) {
7422                         # not twice as wide as tall: 72 x 27 pixels
7423                         print "<logo>" . esc_url($logo) . "</logo>\n";
7424                 }
7425                 if (! %latest_date) {
7426                         # dummy date to keep the feed valid until commits trickle in:
7427                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7428                 } else {
7429                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7430                 }
7431                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7432         }
7433
7434         # contents
7435         for (my $i = 0; $i <= $#commitlist; $i++) {
7436                 my %co = %{$commitlist[$i]};
7437                 my $commit = $co{'id'};
7438                 # we read 150, we always show 30 and the ones more recent than 48 hours
7439                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7440                         last;
7441                 }
7442                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7443
7444                 # get list of changed files
7445                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7446                         $co{'parent'} || "--root",
7447                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7448                         or next;
7449                 my @difftree = map { chomp; $_ } <$fd>;
7450                 close $fd
7451                         or next;
7452
7453                 # print element (entry, item)
7454                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7455                 if ($format eq 'rss') {
7456                         print "<item>\n" .
7457                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7458                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7459                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7460                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7461                               "<link>$co_url</link>\n" .
7462                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7463                               "<content:encoded>" .
7464                               "<![CDATA[\n";
7465                 } elsif ($format eq 'atom') {
7466                         print "<entry>\n" .
7467                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7468                               "<updated>$cd{'iso-8601'}</updated>\n" .
7469                               "<author>\n" .
7470                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7471                         if ($co{'author_email'}) {
7472                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7473                         }
7474                         print "</author>\n" .
7475                               # use committer for contributor
7476                               "<contributor>\n" .
7477                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7478                         if ($co{'committer_email'}) {
7479                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7480                         }
7481                         print "</contributor>\n" .
7482                               "<published>$cd{'iso-8601'}</published>\n" .
7483                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7484                               "<id>$co_url</id>\n" .
7485                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7486                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7487                 }
7488                 my $comment = $co{'comment'};
7489                 print "<pre>\n";
7490                 foreach my $line (@$comment) {
7491                         $line = esc_html($line);
7492                         print "$line\n";
7493                 }
7494                 print "</pre><ul>\n";
7495                 foreach my $difftree_line (@difftree) {
7496                         my %difftree = parse_difftree_raw_line($difftree_line);
7497                         next if !$difftree{'from_id'};
7498
7499                         my $file = $difftree{'file'} || $difftree{'to_file'};
7500
7501                         print "<li>" .
7502                               "[" .
7503                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7504                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7505                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7506                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7507                                       -title => "diff"}, 'D');
7508                         if ($have_blame) {
7509                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7510                                                              file_name=>$file, hash_base=>$commit),
7511                                               -title => "blame"}, 'B');
7512                         }
7513                         # if this is not a feed of a file history
7514                         if (!defined $file_name || $file_name ne $file) {
7515                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7516                                                              file_name=>$file, hash=>$commit),
7517                                               -title => "history"}, 'H');
7518                         }
7519                         $file = esc_path($file);
7520                         print "] ".
7521                               "$file</li>\n";
7522                 }
7523                 if ($format eq 'rss') {
7524                         print "</ul>]]>\n" .
7525                               "</content:encoded>\n" .
7526                               "</item>\n";
7527                 } elsif ($format eq 'atom') {
7528                         print "</ul>\n</div>\n" .
7529                               "</content>\n" .
7530                               "</entry>\n";
7531                 }
7532         }
7533
7534         # end of feed
7535         if ($format eq 'rss') {
7536                 print "</channel>\n</rss>\n";
7537         } elsif ($format eq 'atom') {
7538                 print "</feed>\n";
7539         }
7540 }
7541
7542 sub git_rss {
7543         git_feed('rss');
7544 }
7545
7546 sub git_atom {
7547         git_feed('atom');
7548 }
7549
7550 sub git_opml {
7551         my @list = git_get_projects_list();
7552         if (!@list) {
7553                 die_error(404, "No projects found");
7554         }
7555
7556         print $cgi->header(
7557                 -type => 'text/xml',
7558                 -charset => 'utf-8',
7559                 -content_disposition => 'inline; filename="opml.xml"');
7560
7561         print <<XML;
7562 <?xml version="1.0" encoding="utf-8"?>
7563 <opml version="1.0">
7564 <head>
7565   <title>$site_name OPML Export</title>
7566 </head>
7567 <body>
7568 <outline text="git RSS feeds">
7569 XML
7570
7571         foreach my $pr (@list) {
7572                 my %proj = %$pr;
7573                 my $head = git_get_head_hash($proj{'path'});
7574                 if (!defined $head) {
7575                         next;
7576                 }
7577                 $git_dir = "$projectroot/$proj{'path'}";
7578                 my %co = parse_commit($head);
7579                 if (!%co) {
7580                         next;
7581                 }
7582
7583                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7584                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7585                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7586                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7587         }
7588         print <<XML;
7589 </outline>
7590 </body>
7591 </opml>
7592 XML
7593 }