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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # group projects by category on the projects list
 119 # (enabled if this variable evaluates to true)
 120 our $projects_list_group_categories = 0;
 121
 122 # default category if none specified
 123 # (leave the empty string for no category)
 124 our $project_list_default_category = "";
 125
 126 # default order of projects list
 127 # valid values are none, project, descr, owner, and age
 128 our $default_projects_order = "project";
 129
 130 # show repository only if this file exists
 131 # (only effective if this variable evaluates to true)
 132 our $export_ok = "++GITWEB_EXPORT_OK++";
 133
 134 # show repository only if this subroutine returns true
 135 # when given the path to the project, for example:
 136 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 137 our $export_auth_hook = undef;
 138
 139 # only allow viewing of repositories also shown on the overview page
 140 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 141
 142 # list of git base URLs used for URL to where fetch project from,
 143 # i.e. full URL is "$git_base_url/$project"
 144 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 145
 146 # default blob_plain mimetype and default charset for text/plain blob
 147 our $default_blob_plain_mimetype = 'text/plain';
 148 our $default_text_plain_charset  = undef;
 149
 150 # file to use for guessing MIME types before trying /etc/mime.types
 151 # (relative to the current git repository)
 152 our $mimetypes_file = undef;
 153
 154 # assume this charset if line contains non-UTF-8 characters;
 155 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 156 # for which encoding all byte sequences are valid, for example
 157 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 158 # could be even 'utf-8' for the old behavior)
 159 our $fallback_encoding = 'latin1';
 160
 161 # rename detection options for git-diff and git-diff-tree
 162 # - default is '-M', with the cost proportional to
 163 #   (number of removed files) * (number of new files).
 164 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 165 #   (number of changed files + number of removed files) * (number of new files)
 166 # - even more costly is '-C', '--find-copies-harder' with cost
 167 #   (number of files in the original tree) * (number of new files)
 168 # - one might want to include '-B' option, e.g. '-B', '-M'
 169 our @diff_opts = ('-M'); # taken from git_commit
 170
 171 # Disables features that would allow repository owners to inject script into
 172 # the gitweb domain.
 173 our $prevent_xss = 0;
 174
 175 # Path to the highlight executable to use (must be the one from
 176 # http://www.andre-simon.de due to assumptions about parameters and output).
 177 # Useful if highlight is not installed on your webserver's PATH.
 178 # [Default: highlight]
 179 our $highlight_bin = "++HIGHLIGHT_BIN++";
 180
 181 # information about snapshot formats that gitweb is capable of serving
 182 our %known_snapshot_formats = (
 183         # name => {
 184         #       'display' => display name,
 185         #       'type' => mime type,
 186         #       'suffix' => filename suffix,
 187         #       'format' => --format for git-archive,
 188         #       'compressor' => [compressor command and arguments]
 189         #                       (array reference, optional)
 190         #       'disabled' => boolean (optional)}
 191         #
 192         'tgz' => {
 193                 'display' => 'tar.gz',
 194                 'type' => 'application/x-gzip',
 195                 'suffix' => '.tar.gz',
 196                 'format' => 'tar',
 197                 'compressor' => ['gzip', '-n']},
 198
 199         'tbz2' => {
 200                 'display' => 'tar.bz2',
 201                 'type' => 'application/x-bzip2',
 202                 'suffix' => '.tar.bz2',
 203                 'format' => 'tar',
 204                 'compressor' => ['bzip2']},
 205
 206         'txz' => {
 207                 'display' => 'tar.xz',
 208                 'type' => 'application/x-xz',
 209                 'suffix' => '.tar.xz',
 210                 'format' => 'tar',
 211                 'compressor' => ['xz'],
 212                 'disabled' => 1},
 213
 214         'zip' => {
 215                 'display' => 'zip',
 216                 'type' => 'application/x-zip',
 217                 'suffix' => '.zip',
 218                 'format' => 'zip'},
 219 );
 220
 221 # Aliases so we understand old gitweb.snapshot values in repository
 222 # configuration.
 223 our %known_snapshot_format_aliases = (
 224         'gzip'  => 'tgz',
 225         'bzip2' => 'tbz2',
 226         'xz'    => 'txz',
 227
 228         # backward compatibility: legacy gitweb config support
 229         'x-gzip' => undef, 'gz' => undef,
 230         'x-bzip2' => undef, 'bz2' => undef,
 231         'x-zip' => undef, '' => undef,
 232 );
 233
 234 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 235 # are changed, it may be appropriate to change these values too via
 236 # $GITWEB_CONFIG.
 237 our %avatar_size = (
 238         'default' => 16,
 239         'double'  => 32
 240 );
 241
 242 # Used to set the maximum load that we will still respond to gitweb queries.
 243 # If server load exceed this value then return "503 server busy" error.
 244 # If gitweb cannot determined server load, it is taken to be 0.
 245 # Leave it undefined (or set to 'undef') to turn off load checking.
 246 our $maxload = 300;
 247
 248 # configuration for 'highlight' (http://www.andre-simon.de/)
 249 # match by basename
 250 our %highlight_basename = (
 251         #'Program' => 'py',
 252         #'Library' => 'py',
 253         'SConstruct' => 'py', # SCons equivalent of Makefile
 254         'Makefile' => 'make',
 255 );
 256 # match by extension
 257 our %highlight_ext = (
 258         # main extensions, defining name of syntax;
 259         # see files in /usr/share/highlight/langDefs/ directory
 260         map { $_ => $_ }
 261                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 262         # alternate extensions, see /etc/highlight/filetypes.conf
 263         'h' => 'c',
 264         map { $_ => 'sh'  } qw(bash zsh ksh),
 265         map { $_ => 'cpp' } qw(cxx c++ cc),
 266         map { $_ => 'php' } qw(php3 php4 php5 phps),
 267         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 268         map { $_ => 'make'} qw(mak mk),
 269         map { $_ => 'xml' } qw(xhtml html htm),
 270 );
 271
 272 # You define site-wide feature defaults here; override them with
 273 # $GITWEB_CONFIG as necessary.
 274 our %feature = (
 275         # feature => {
 276         #       'sub' => feature-sub (subroutine),
 277         #       'override' => allow-override (boolean),
 278         #       'default' => [ default options...] (array reference)}
 279         #
 280         # if feature is overridable (it means that allow-override has true value),
 281         # then feature-sub will be called with default options as parameters;
 282         # return value of feature-sub indicates if to enable specified feature
 283         #
 284         # if there is no 'sub' key (no feature-sub), then feature cannot be
 285         # overridden
 286         #
 287         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 288         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 289         # is enabled
 290
 291         # Enable the 'blame' blob view, showing the last commit that modified
 292         # each line in the file. This can be very CPU-intensive.
 293
 294         # To enable system wide have in $GITWEB_CONFIG
 295         # $feature{'blame'}{'default'} = [1];
 296         # To have project specific config enable override in $GITWEB_CONFIG
 297         # $feature{'blame'}{'override'} = 1;
 298         # and in project config gitweb.blame = 0|1;
 299         'blame' => {
 300                 'sub' => sub { feature_bool('blame', @_) },
 301                 'override' => 0,
 302                 'default' => [0]},
 303
 304         # Enable the 'snapshot' link, providing a compressed archive of any
 305         # tree. This can potentially generate high traffic if you have large
 306         # project.
 307
 308         # Value is a list of formats defined in %known_snapshot_formats that
 309         # you wish to offer.
 310         # To disable system wide have in $GITWEB_CONFIG
 311         # $feature{'snapshot'}{'default'} = [];
 312         # To have project specific config enable override in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'override'} = 1;
 314         # and in project config, a comma-separated list of formats or "none"
 315         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 316         'snapshot' => {
 317                 'sub' => \&feature_snapshot,
 318                 'override' => 0,
 319                 'default' => ['tgz']},
 320
 321         # Enable text search, which will list the commits which match author,
 322         # committer or commit text to a given string.  Enabled by default.
 323         # Project specific override is not supported.
 324         'search' => {
 325                 'override' => 0,
 326                 'default' => [1]},
 327
 328         # Enable grep search, which will list the files in currently selected
 329         # tree containing the given string. Enabled by default. This can be
 330         # potentially CPU-intensive, of course.
 331         # Note that you need to have 'search' feature enabled too.
 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         # Note that you need to have 'search' feature enabled too.
 347
 348         # To enable system wide have in $GITWEB_CONFIG
 349         # $feature{'pickaxe'}{'default'} = [1];
 350         # To have project specific config enable override in $GITWEB_CONFIG
 351         # $feature{'pickaxe'}{'override'} = 1;
 352         # and in project config gitweb.pickaxe = 0|1;
 353         'pickaxe' => {
 354                 'sub' => sub { feature_bool('pickaxe', @_) },
 355                 'override' => 0,
 356                 'default' => [1]},
 357
 358         # Enable showing size of blobs in a 'tree' view, in a separate
 359         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 360
 361         # To disable system wide have in $GITWEB_CONFIG
 362         # $feature{'show-sizes'}{'default'} = [0];
 363         # To have project specific config enable override in $GITWEB_CONFIG
 364         # $feature{'show-sizes'}{'override'} = 1;
 365         # and in project config gitweb.showsizes = 0|1;
 366         'show-sizes' => {
 367                 'sub' => sub { feature_bool('showsizes', @_) },
 368                 'override' => 0,
 369                 'default' => [1]},
 370
 371         # Make gitweb use an alternative format of the URLs which can be
 372         # more readable and natural-looking: project name is embedded
 373         # directly in the path and the query string contains other
 374         # auxiliary information. All gitweb installations recognize
 375         # URL in either format; this configures in which formats gitweb
 376         # generates links.
 377
 378         # To enable system wide have in $GITWEB_CONFIG
 379         # $feature{'pathinfo'}{'default'} = [1];
 380         # Project specific override is not supported.
 381
 382         # Note that you will need to change the default location of CSS,
 383         # favicon, logo and possibly other files to an absolute URL. Also,
 384         # if gitweb.cgi serves as your indexfile, you will need to force
 385         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 386         'pathinfo' => {
 387                 'override' => 0,
 388                 'default' => [0]},
 389
 390         # Make gitweb consider projects in project root subdirectories
 391         # to be forks of existing projects. Given project $projname.git,
 392         # projects matching $projname/*.git will not be shown in the main
 393         # projects list, instead a '+' mark will be added to $projname
 394         # there and a 'forks' view will be enabled for the project, listing
 395         # all the forks. If project list is taken from a file, forks have
 396         # to be listed after the main project.
 397
 398         # To enable system wide have in $GITWEB_CONFIG
 399         # $feature{'forks'}{'default'} = [1];
 400         # Project specific override is not supported.
 401         'forks' => {
 402                 'override' => 0,
 403                 'default' => [0]},
 404
 405         # Insert custom links to the action bar of all project pages.
 406         # This enables you mainly to link to third-party scripts integrating
 407         # into gitweb; e.g. git-browser for graphical history representation
 408         # or custom web-based repository administration interface.
 409
 410         # The 'default' value consists of a list of triplets in the form
 411         # (label, link, position) where position is the label after which
 412         # to insert the link and link is a format string where %n expands
 413         # to the project name, %f to the project path within the filesystem,
 414         # %h to the current hash (h gitweb parameter) and %b to the current
 415         # hash base (hb gitweb parameter); %% expands to %.
 416
 417         # To enable system wide have in $GITWEB_CONFIG e.g.
 418         # $feature{'actions'}{'default'} = [('graphiclog',
 419         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 420         # Project specific override is not supported.
 421         'actions' => {
 422                 'override' => 0,
 423                 'default' => []},
 424
 425         # Allow gitweb scan project content tags of project repository,
 426         # and display the popular Web 2.0-ish "tag cloud" near the projects
 427         # list.  Note that this is something COMPLETELY different from the
 428         # normal Git tags.
 429
 430         # gitweb by itself can show existing tags, but it does not handle
 431         # tagging itself; you need to do it externally, outside gitweb.
 432         # The format is described in git_get_project_ctags() subroutine.
 433         # You may want to install the HTML::TagCloud Perl module to get
 434         # a pretty tag cloud instead of just a list of tags.
 435
 436         # To enable system wide have in $GITWEB_CONFIG
 437         # $feature{'ctags'}{'default'} = [1];
 438         # Project specific override is not supported.
 439
 440         # In the future whether ctags editing is enabled might depend
 441         # on the value, but using 1 should always mean no editing of ctags.
 442         'ctags' => {
 443                 'override' => 0,
 444                 'default' => [0]},
 445
 446         # The maximum number of patches in a patchset generated in patch
 447         # view. Set this to 0 or undef to disable patch view, or to a
 448         # negative number to remove any limit.
 449
 450         # To disable system wide have in $GITWEB_CONFIG
 451         # $feature{'patches'}{'default'} = [0];
 452         # To have project specific config enable override in $GITWEB_CONFIG
 453         # $feature{'patches'}{'override'} = 1;
 454         # and in project config gitweb.patches = 0|n;
 455         # where n is the maximum number of patches allowed in a patchset.
 456         'patches' => {
 457                 'sub' => \&feature_patches,
 458                 'override' => 0,
 459                 'default' => [16]},
 460
 461         # Avatar support. When this feature is enabled, views such as
 462         # shortlog or commit will display an avatar associated with
 463         # the email of the committer(s) and/or author(s).
 464
 465         # Currently available providers are gravatar and picon.
 466         # If an unknown provider is specified, the feature is disabled.
 467
 468         # Gravatar depends on Digest::MD5.
 469         # Picon currently relies on the indiana.edu database.
 470
 471         # To enable system wide have in $GITWEB_CONFIG
 472         # $feature{'avatar'}{'default'} = ['<provider>'];
 473         # where <provider> is either gravatar or picon.
 474         # To have project specific config enable override in $GITWEB_CONFIG
 475         # $feature{'avatar'}{'override'} = 1;
 476         # and in project config gitweb.avatar = <provider>;
 477         'avatar' => {
 478                 'sub' => \&feature_avatar,
 479                 'override' => 0,
 480                 'default' => ['']},
 481
 482         # Enable displaying how much time and how many git commands
 483         # it took to generate and display page.  Disabled by default.
 484         # Project specific override is not supported.
 485         'timed' => {
 486                 'override' => 0,
 487                 'default' => [0]},
 488
 489         # Enable turning some links into links to actions which require
 490         # JavaScript to run (like 'blame_incremental').  Not enabled by
 491         # default.  Project specific override is currently not supported.
 492         'javascript-actions' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable and configure ability to change common timezone for dates
 497         # in gitweb output via JavaScript.  Enabled by default.
 498         # Project specific override is not supported.
 499         'javascript-timezone' => {
 500                 'override' => 0,
 501                 'default' => [
 502                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 503                                      # or undef to turn off this feature
 504                         'gitweb_tz', # name of cookie where to store selected timezone
 505                         'datetime',  # CSS class used to mark up dates for manipulation
 506                 ]},
 507
 508         # Syntax highlighting support. This is based on Daniel Svensson's
 509         # and Sham Chukoury's work in gitweb-xmms2.git.
 510         # It requires the 'highlight' program present in $PATH,
 511         # and therefore is disabled by default.
 512
 513         # To enable system wide have in $GITWEB_CONFIG
 514         # $feature{'highlight'}{'default'} = [1];
 515
 516         'highlight' => {
 517                 'sub' => sub { feature_bool('highlight', @_) },
 518                 'override' => 0,
 519                 'default' => [0]},
 520
 521         # Enable displaying of remote heads in the heads list
 522
 523         # To enable system wide have in $GITWEB_CONFIG
 524         # $feature{'remote_heads'}{'default'} = [1];
 525         # To have project specific config enable override in $GITWEB_CONFIG
 526         # $feature{'remote_heads'}{'override'} = 1;
 527         # and in project config gitweb.remote_heads = 0|1;
 528         'remote_heads' => {
 529                 'sub' => sub { feature_bool('remote_heads', @_) },
 530                 'override' => 0,
 531                 'default' => [0]},
 532 );
 533
 534 sub gitweb_get_feature {
 535         my ($name) = @_;
 536         return unless exists $feature{$name};
 537         my ($sub, $override, @defaults) = (
 538                 $feature{$name}{'sub'},
 539                 $feature{$name}{'override'},
 540                 @{$feature{$name}{'default'}});
 541         # project specific override is possible only if we have project
 542         our $git_dir; # global variable, declared later
 543         if (!$override || !defined $git_dir) {
 544                 return @defaults;
 545         }
 546         if (!defined $sub) {
 547                 warn "feature $name is not overridable";
 548                 return @defaults;
 549         }
 550         return $sub->(@defaults);
 551 }
 552
 553 # A wrapper to check if a given feature is enabled.
 554 # With this, you can say
 555 #
 556 #   my $bool_feat = gitweb_check_feature('bool_feat');
 557 #   gitweb_check_feature('bool_feat') or somecode;
 558 #
 559 # instead of
 560 #
 561 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 562 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 563 #
 564 sub gitweb_check_feature {
 565         return (gitweb_get_feature(@_))[0];
 566 }
 567
 568
 569 sub feature_bool {
 570         my $key = shift;
 571         my ($val) = git_get_project_config($key, '--bool');
 572
 573         if (!defined $val) {
 574                 return ($_[0]);
 575         } elsif ($val eq 'true') {
 576                 return (1);
 577         } elsif ($val eq 'false') {
 578                 return (0);
 579         }
 580 }
 581
 582 sub feature_snapshot {
 583         my (@fmts) = @_;
 584
 585         my ($val) = git_get_project_config('snapshot');
 586
 587         if ($val) {
 588                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 589         }
 590
 591         return @fmts;
 592 }
 593
 594 sub feature_patches {
 595         my @val = (git_get_project_config('patches', '--int'));
 596
 597         if (@val) {
 598                 return @val;
 599         }
 600
 601         return ($_[0]);
 602 }
 603
 604 sub feature_avatar {
 605         my @val = (git_get_project_config('avatar'));
 606
 607         return @val ? @val : @_;
 608 }
 609
 610 # checking HEAD file with -e is fragile if the repository was
 611 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 612 # and then pruned.
 613 sub check_head_link {
 614         my ($dir) = @_;
 615         my $headfile = "$dir/HEAD";
 616         return ((-e $headfile) ||
 617                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 618 }
 619
 620 sub check_export_ok {
 621         my ($dir) = @_;
 622         return (check_head_link($dir) &&
 623                 (!$export_ok || -e "$dir/$export_ok") &&
 624                 (!$export_auth_hook || $export_auth_hook->($dir)));
 625 }
 626
 627 # process alternate names for backward compatibility
 628 # filter out unsupported (unknown) snapshot formats
 629 sub filter_snapshot_fmts {
 630         my @fmts = @_;
 631
 632         @fmts = map {
 633                 exists $known_snapshot_format_aliases{$_} ?
 634                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 635         @fmts = grep {
 636                 exists $known_snapshot_formats{$_} &&
 637                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 638 }
 639
 640 # If it is set to code reference, it is code that it is to be run once per
 641 # request, allowing updating configurations that change with each request,
 642 # while running other code in config file only once.
 643 #
 644 # Otherwise, if it is false then gitweb would process config file only once;
 645 # if it is true then gitweb config would be run for each request.
 646 our $per_request_config = 1;
 647
 648 # read and parse gitweb config file given by its parameter.
 649 # returns true on success, false on recoverable error, allowing
 650 # to chain this subroutine, using first file that exists.
 651 # dies on errors during parsing config file, as it is unrecoverable.
 652 sub read_config_file {
 653         my $filename = shift;
 654         return unless defined $filename;
 655         # die if there are errors parsing config file
 656         if (-e $filename) {
 657                 do $filename;
 658                 die $@ if $@;
 659                 return 1;
 660         }
 661         return;
 662 }
 663
 664 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 665 sub evaluate_gitweb_config {
 666         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 667         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 668
 669         # use first config file that exists
 670         read_config_file($GITWEB_CONFIG) or
 671         read_config_file($GITWEB_CONFIG_SYSTEM);
 672 }
 673
 674 # Get loadavg of system, to compare against $maxload.
 675 # Currently it requires '/proc/loadavg' present to get loadavg;
 676 # if it is not present it returns 0, which means no load checking.
 677 sub get_loadavg {
 678         if( -e '/proc/loadavg' ){
 679                 open my $fd, '<', '/proc/loadavg'
 680                         or return 0;
 681                 my @load = split(/\s+/, scalar <$fd>);
 682                 close $fd;
 683
 684                 # The first three columns measure CPU and IO utilization of the last one,
 685                 # five, and 10 minute periods.  The fourth column shows the number of
 686                 # currently running processes and the total number of processes in the m/n
 687                 # format.  The last column displays the last process ID used.
 688                 return $load[0] || 0;
 689         }
 690         # additional checks for load average should go here for things that don't export
 691         # /proc/loadavg
 692
 693         return 0;
 694 }
 695
 696 # version of the core git binary
 697 our $git_version;
 698 sub evaluate_git_version {
 699         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 700         $number_of_git_cmds++;
 701 }
 702
 703 sub check_loadavg {
 704         if (defined $maxload && get_loadavg() > $maxload) {
 705                 die_error(503, "The load average on the server is too high");
 706         }
 707 }
 708
 709 # ======================================================================
 710 # input validation and dispatch
 711
 712 # input parameters can be collected from a variety of sources (presently, CGI
 713 # and PATH_INFO), so we define an %input_params hash that collects them all
 714 # together during validation: this allows subsequent uses (e.g. href()) to be
 715 # agnostic of the parameter origin
 716
 717 our %input_params = ();
 718
 719 # input parameters are stored with the long parameter name as key. This will
 720 # also be used in the href subroutine to convert parameters to their CGI
 721 # equivalent, and since the href() usage is the most frequent one, we store
 722 # the name -> CGI key mapping here, instead of the reverse.
 723 #
 724 # XXX: Warning: If you touch this, check the search form for updating,
 725 # too.
 726
 727 our @cgi_param_mapping = (
 728         project => "p",
 729         action => "a",
 730         file_name => "f",
 731         file_parent => "fp",
 732         hash => "h",
 733         hash_parent => "hp",
 734         hash_base => "hb",
 735         hash_parent_base => "hpb",
 736         page => "pg",
 737         order => "o",
 738         searchtext => "s",
 739         searchtype => "st",
 740         snapshot_format => "sf",
 741         extra_options => "opt",
 742         search_use_regexp => "sr",
 743         ctag => "by_tag",
 744         # this must be last entry (for manipulation from JavaScript)
 745         javascript => "js"
 746 );
 747 our %cgi_param_mapping = @cgi_param_mapping;
 748
 749 # we will also need to know the possible actions, for validation
 750 our %actions = (
 751         "blame" => \&git_blame,
 752         "blame_incremental" => \&git_blame_incremental,
 753         "blame_data" => \&git_blame_data,
 754         "blobdiff" => \&git_blobdiff,
 755         "blobdiff_plain" => \&git_blobdiff_plain,
 756         "blob" => \&git_blob,
 757         "blob_plain" => \&git_blob_plain,
 758         "commitdiff" => \&git_commitdiff,
 759         "commitdiff_plain" => \&git_commitdiff_plain,
 760         "commit" => \&git_commit,
 761         "forks" => \&git_forks,
 762         "heads" => \&git_heads,
 763         "history" => \&git_history,
 764         "log" => \&git_log,
 765         "patch" => \&git_patch,
 766         "patches" => \&git_patches,
 767         "remotes" => \&git_remotes,
 768         "rss" => \&git_rss,
 769         "atom" => \&git_atom,
 770         "search" => \&git_search,
 771         "search_help" => \&git_search_help,
 772         "shortlog" => \&git_shortlog,
 773         "summary" => \&git_summary,
 774         "tag" => \&git_tag,
 775         "tags" => \&git_tags,
 776         "tree" => \&git_tree,
 777         "snapshot" => \&git_snapshot,
 778         "object" => \&git_object,
 779         # those below don't need $project
 780         "opml" => \&git_opml,
 781         "project_list" => \&git_project_list,
 782         "project_index" => \&git_project_index,
 783 );
 784
 785 # finally, we have the hash of allowed extra_options for the commands that
 786 # allow them
 787 our %allowed_options = (
 788         "--no-merges" => [ qw(rss atom log shortlog history) ],
 789 );
 790
 791 # fill %input_params with the CGI parameters. All values except for 'opt'
 792 # should be single values, but opt can be an array. We should probably
 793 # build an array of parameters that can be multi-valued, but since for the time
 794 # being it's only this one, we just single it out
 795 sub evaluate_query_params {
 796         our $cgi;
 797
 798         while (my ($name, $symbol) = each %cgi_param_mapping) {
 799                 if ($symbol eq 'opt') {
 800                         $input_params{$name} = [ $cgi->param($symbol) ];
 801                 } else {
 802                         $input_params{$name} = $cgi->param($symbol);
 803                 }
 804         }
 805 }
 806
 807 # now read PATH_INFO and update the parameter list for missing parameters
 808 sub evaluate_path_info {
 809         return if defined $input_params{'project'};
 810         return if !$path_info;
 811         $path_info =~ s,^/+,,;
 812         return if !$path_info;
 813
 814         # find which part of PATH_INFO is project
 815         my $project = $path_info;
 816         $project =~ s,/+$,,;
 817         while ($project && !check_head_link("$projectroot/$project")) {
 818                 $project =~ s,/*[^/]*$,,;
 819         }
 820         return unless $project;
 821         $input_params{'project'} = $project;
 822
 823         # do not change any parameters if an action is given using the query string
 824         return if $input_params{'action'};
 825         $path_info =~ s,^\Q$project\E/*,,;
 826
 827         # next, check if we have an action
 828         my $action = $path_info;
 829         $action =~ s,/.*$,,;
 830         if (exists $actions{$action}) {
 831                 $path_info =~ s,^$action/*,,;
 832                 $input_params{'action'} = $action;
 833         }
 834
 835         # list of actions that want hash_base instead of hash, but can have no
 836         # pathname (f) parameter
 837         my @wants_base = (
 838                 'tree',
 839                 'history',
 840         );
 841
 842         # we want to catch, among others
 843         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 844         my ($parentrefname, $parentpathname, $refname, $pathname) =
 845                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 846
 847         # first, analyze the 'current' part
 848         if (defined $pathname) {
 849                 # we got "branch:filename" or "branch:dir/"
 850                 # we could use git_get_type(branch:pathname), but:
 851                 # - it needs $git_dir
 852                 # - it does a git() call
 853                 # - the convention of terminating directories with a slash
 854                 #   makes it superfluous
 855                 # - embedding the action in the PATH_INFO would make it even
 856                 #   more superfluous
 857                 $pathname =~ s,^/+,,;
 858                 if (!$pathname || substr($pathname, -1) eq "/") {
 859                         $input_params{'action'} ||= "tree";
 860                         $pathname =~ s,/$,,;
 861                 } else {
 862                         # the default action depends on whether we had parent info
 863                         # or not
 864                         if ($parentrefname) {
 865                                 $input_params{'action'} ||= "blobdiff_plain";
 866                         } else {
 867                                 $input_params{'action'} ||= "blob_plain";
 868                         }
 869                 }
 870                 $input_params{'hash_base'} ||= $refname;
 871                 $input_params{'file_name'} ||= $pathname;
 872         } elsif (defined $refname) {
 873                 # we got "branch". In this case we have to choose if we have to
 874                 # set hash or hash_base.
 875                 #
 876                 # Most of the actions without a pathname only want hash to be
 877                 # set, except for the ones specified in @wants_base that want
 878                 # hash_base instead. It should also be noted that hand-crafted
 879                 # links having 'history' as an action and no pathname or hash
 880                 # set will fail, but that happens regardless of PATH_INFO.
 881                 if (defined $parentrefname) {
 882                         # if there is parent let the default be 'shortlog' action
 883                         # (for http://git.example.com/repo.git/A..B links); if there
 884                         # is no parent, dispatch will detect type of object and set
 885                         # action appropriately if required (if action is not set)
 886                         $input_params{'action'} ||= "shortlog";
 887                 }
 888                 if ($input_params{'action'} &&
 889                     grep { $_ eq $input_params{'action'} } @wants_base) {
 890                         $input_params{'hash_base'} ||= $refname;
 891                 } else {
 892                         $input_params{'hash'} ||= $refname;
 893                 }
 894         }
 895
 896         # next, handle the 'parent' part, if present
 897         if (defined $parentrefname) {
 898                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 899                 # someproject/blobdiff/oldrev..newrev:/filename
 900                 if ($parentpathname) {
 901                         $parentpathname =~ s,^/+,,;
 902                         $parentpathname =~ s,/$,,;
 903                         $input_params{'file_parent'} ||= $parentpathname;
 904                 } else {
 905                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 906                 }
 907                 # we assume that hash_parent_base is wanted if a path was specified,
 908                 # or if the action wants hash_base instead of hash
 909                 if (defined $input_params{'file_parent'} ||
 910                         grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_parent_base'} ||= $parentrefname;
 912                 } else {
 913                         $input_params{'hash_parent'} ||= $parentrefname;
 914                 }
 915         }
 916
 917         # for the snapshot action, we allow URLs in the form
 918         # $project/snapshot/$hash.ext
 919         # where .ext determines the snapshot and gets removed from the
 920         # passed $refname to provide the $hash.
 921         #
 922         # To be able to tell that $refname includes the format extension, we
 923         # require the following two conditions to be satisfied:
 924         # - the hash input parameter MUST have been set from the $refname part
 925         #   of the URL (i.e. they must be equal)
 926         # - the snapshot format MUST NOT have been defined already (e.g. from
 927         #   CGI parameter sf)
 928         # It's also useless to try any matching unless $refname has a dot,
 929         # so we check for that too
 930         if (defined $input_params{'action'} &&
 931                 $input_params{'action'} eq 'snapshot' &&
 932                 defined $refname && index($refname, '.') != -1 &&
 933                 $refname eq $input_params{'hash'} &&
 934                 !defined $input_params{'snapshot_format'}) {
 935                 # We loop over the known snapshot formats, checking for
 936                 # extensions. Allowed extensions are both the defined suffix
 937                 # (which includes the initial dot already) and the snapshot
 938                 # format key itself, with a prepended dot
 939                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 940                         my $hash = $refname;
 941                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 942                                 next;
 943                         }
 944                         my $sfx = $1;
 945                         # a valid suffix was found, so set the snapshot format
 946                         # and reset the hash parameter
 947                         $input_params{'snapshot_format'} = $fmt;
 948                         $input_params{'hash'} = $hash;
 949                         # we also set the format suffix to the one requested
 950                         # in the URL: this way a request for e.g. .tgz returns
 951                         # a .tgz instead of a .tar.gz
 952                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 953                         last;
 954                 }
 955         }
 956 }
 957
 958 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 959      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 960      $searchtext, $search_regexp);
 961 sub evaluate_and_validate_params {
 962         our $action = $input_params{'action'};
 963         if (defined $action) {
 964                 if (!validate_action($action)) {
 965                         die_error(400, "Invalid action parameter");
 966                 }
 967         }
 968
 969         # parameters which are pathnames
 970         our $project = $input_params{'project'};
 971         if (defined $project) {
 972                 if (!validate_project($project)) {
 973                         undef $project;
 974                         die_error(404, "No such project");
 975                 }
 976         }
 977
 978         our $file_name = $input_params{'file_name'};
 979         if (defined $file_name) {
 980                 if (!validate_pathname($file_name)) {
 981                         die_error(400, "Invalid file parameter");
 982                 }
 983         }
 984
 985         our $file_parent = $input_params{'file_parent'};
 986         if (defined $file_parent) {
 987                 if (!validate_pathname($file_parent)) {
 988                         die_error(400, "Invalid file parent parameter");
 989                 }
 990         }
 991
 992         # parameters which are refnames
 993         our $hash = $input_params{'hash'};
 994         if (defined $hash) {
 995                 if (!validate_refname($hash)) {
 996                         die_error(400, "Invalid hash parameter");
 997                 }
 998         }
 999
1000         our $hash_parent = $input_params{'hash_parent'};
1001         if (defined $hash_parent) {
1002                 if (!validate_refname($hash_parent)) {
1003                         die_error(400, "Invalid hash parent parameter");
1004                 }
1005         }
1006
1007         our $hash_base = $input_params{'hash_base'};
1008         if (defined $hash_base) {
1009                 if (!validate_refname($hash_base)) {
1010                         die_error(400, "Invalid hash base parameter");
1011                 }
1012         }
1013
1014         our @extra_options = @{$input_params{'extra_options'}};
1015         # @extra_options is always defined, since it can only be (currently) set from
1016         # CGI, and $cgi->param() returns the empty array in array context if the param
1017         # is not set
1018         foreach my $opt (@extra_options) {
1019                 if (not exists $allowed_options{$opt}) {
1020                         die_error(400, "Invalid option parameter");
1021                 }
1022                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1023                         die_error(400, "Invalid option parameter for this action");
1024                 }
1025         }
1026
1027         our $hash_parent_base = $input_params{'hash_parent_base'};
1028         if (defined $hash_parent_base) {
1029                 if (!validate_refname($hash_parent_base)) {
1030                         die_error(400, "Invalid hash parent base parameter");
1031                 }
1032         }
1033
1034         # other parameters
1035         our $page = $input_params{'page'};
1036         if (defined $page) {
1037                 if ($page =~ m/[^0-9]/) {
1038                         die_error(400, "Invalid page parameter");
1039                 }
1040         }
1041
1042         our $searchtype = $input_params{'searchtype'};
1043         if (defined $searchtype) {
1044                 if ($searchtype =~ m/[^a-z]/) {
1045                         die_error(400, "Invalid searchtype parameter");
1046                 }
1047         }
1048
1049         our $search_use_regexp = $input_params{'search_use_regexp'};
1050
1051         our $searchtext = $input_params{'searchtext'};
1052         our $search_regexp;
1053         if (defined $searchtext) {
1054                 if (length($searchtext) < 2) {
1055                         die_error(403, "At least two characters are required for search parameter");
1056                 }
1057                 if ($search_use_regexp) {
1058                         $search_regexp = $searchtext;
1059                         if (!eval { qr/$search_regexp/; 1; }) {
1060                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1061                                 die_error(400, "Invalid search regexp '$search_regexp'",
1062                                           esc_html($error));
1063                         }
1064                 } else {
1065                         $search_regexp = quotemeta $searchtext;
1066                 }
1067         }
1068 }
1069
1070 # path to the current git repository
1071 our $git_dir;
1072 sub evaluate_git_dir {
1073         our $git_dir = "$projectroot/$project" if $project;
1074 }
1075
1076 our (@snapshot_fmts, $git_avatar);
1077 sub configure_gitweb_features {
1078         # list of supported snapshot formats
1079         our @snapshot_fmts = gitweb_get_feature('snapshot');
1080         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1081
1082         # check that the avatar feature is set to a known provider name,
1083         # and for each provider check if the dependencies are satisfied.
1084         # if the provider name is invalid or the dependencies are not met,
1085         # reset $git_avatar to the empty string.
1086         our ($git_avatar) = gitweb_get_feature('avatar');
1087         if ($git_avatar eq 'gravatar') {
1088                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1089         } elsif ($git_avatar eq 'picon') {
1090                 # no dependencies
1091         } else {
1092                 $git_avatar = '';
1093         }
1094 }
1095
1096 # custom error handler: 'die <message>' is Internal Server Error
1097 sub handle_errors_html {
1098         my $msg = shift; # it is already HTML escaped
1099
1100         # to avoid infinite loop where error occurs in die_error,
1101         # change handler to default handler, disabling handle_errors_html
1102         set_message("Error occured when inside die_error:\n$msg");
1103
1104         # you cannot jump out of die_error when called as error handler;
1105         # the subroutine set via CGI::Carp::set_message is called _after_
1106         # HTTP headers are already written, so it cannot write them itself
1107         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1108 }
1109 set_message(\&handle_errors_html);
1110
1111 # dispatch
1112 sub dispatch {
1113         if (!defined $action) {
1114                 if (defined $hash) {
1115                         $action = git_get_type($hash);
1116                 } elsif (defined $hash_base && defined $file_name) {
1117                         $action = git_get_type("$hash_base:$file_name");
1118                 } elsif (defined $project) {
1119                         $action = 'summary';
1120                 } else {
1121                         $action = 'project_list';
1122                 }
1123         }
1124         if (!defined($actions{$action})) {
1125                 die_error(400, "Unknown action");
1126         }
1127         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1128             !$project) {
1129                 die_error(400, "Project needed");
1130         }
1131         $actions{$action}->();
1132 }
1133
1134 sub reset_timer {
1135         our $t0 = [ gettimeofday() ]
1136                 if defined $t0;
1137         our $number_of_git_cmds = 0;
1138 }
1139
1140 our $first_request = 1;
1141 sub run_request {
1142         reset_timer();
1143
1144         evaluate_uri();
1145         if ($first_request) {
1146                 evaluate_gitweb_config();
1147                 evaluate_git_version();
1148         }
1149         if ($per_request_config) {
1150                 if (ref($per_request_config) eq 'CODE') {
1151                         $per_request_config->();
1152                 } elsif (!$first_request) {
1153                         evaluate_gitweb_config();
1154                 }
1155         }
1156         check_loadavg();
1157
1158         # $projectroot and $projects_list might be set in gitweb config file
1159         $projects_list ||= $projectroot;
1160
1161         evaluate_query_params();
1162         evaluate_path_info();
1163         evaluate_and_validate_params();
1164         evaluate_git_dir();
1165
1166         configure_gitweb_features();
1167
1168         dispatch();
1169 }
1170
1171 our $is_last_request = sub { 1 };
1172 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1173 our $CGI = 'CGI';
1174 our $cgi;
1175 sub configure_as_fcgi {
1176         require CGI::Fast;
1177         our $CGI = 'CGI::Fast';
1178
1179         my $request_number = 0;
1180         # let each child service 100 requests
1181         our $is_last_request = sub { ++$request_number > 100 };
1182 }
1183 sub evaluate_argv {
1184         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1185         configure_as_fcgi()
1186                 if $script_name =~ /\.fcgi$/;
1187
1188         return unless (@ARGV);
1189
1190         require Getopt::Long;
1191         Getopt::Long::GetOptions(
1192                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1193                 'nproc|n=i' => sub {
1194                         my ($arg, $val) = @_;
1195                         return unless eval { require FCGI::ProcManager; 1; };
1196                         my $proc_manager = FCGI::ProcManager->new({
1197                                 n_processes => $val,
1198                         });
1199                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1200                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1201                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1202                 },
1203         );
1204 }
1205
1206 sub run {
1207         evaluate_argv();
1208
1209         $first_request = 1;
1210         $pre_listen_hook->()
1211                 if $pre_listen_hook;
1212
1213  REQUEST:
1214         while ($cgi = $CGI->new()) {
1215                 $pre_dispatch_hook->()
1216                         if $pre_dispatch_hook;
1217
1218                 run_request();
1219
1220                 $post_dispatch_hook->()
1221                         if $post_dispatch_hook;
1222                 $first_request = 0;
1223
1224                 last REQUEST if ($is_last_request->());
1225         }
1226
1227  DONE_GITWEB:
1228         1;
1229 }
1230
1231 run();
1232
1233 if (defined caller) {
1234         # wrapped in a subroutine processing requests,
1235         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1236         return;
1237 } else {
1238         # pure CGI script, serving single request
1239         exit;
1240 }
1241
1242 ## ======================================================================
1243 ## action links
1244
1245 # possible values of extra options
1246 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1247 # -replay => 1      - start from a current view (replay with modifications)
1248 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1249 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1250 sub href {
1251         my %params = @_;
1252         # default is to use -absolute url() i.e. $my_uri
1253         my $href = $params{-full} ? $my_url : $my_uri;
1254
1255         # implicit -replay, must be first of implicit params
1256         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1257
1258         $params{'project'} = $project unless exists $params{'project'};
1259
1260         if ($params{-replay}) {
1261                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1262                         if (!exists $params{$name}) {
1263                                 $params{$name} = $input_params{$name};
1264                         }
1265                 }
1266         }
1267
1268         my $use_pathinfo = gitweb_check_feature('pathinfo');
1269         if (defined $params{'project'} &&
1270             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1271                 # try to put as many parameters as possible in PATH_INFO:
1272                 #   - project name
1273                 #   - action
1274                 #   - hash_parent or hash_parent_base:/file_parent
1275                 #   - hash or hash_base:/filename
1276                 #   - the snapshot_format as an appropriate suffix
1277
1278                 # When the script is the root DirectoryIndex for the domain,
1279                 # $href here would be something like http://gitweb.example.com/
1280                 # Thus, we strip any trailing / from $href, to spare us double
1281                 # slashes in the final URL
1282                 $href =~ s,/$,,;
1283
1284                 # Then add the project name, if present
1285                 $href .= "/".esc_path_info($params{'project'});
1286                 delete $params{'project'};
1287
1288                 # since we destructively absorb parameters, we keep this
1289                 # boolean that remembers if we're handling a snapshot
1290                 my $is_snapshot = $params{'action'} eq 'snapshot';
1291
1292                 # Summary just uses the project path URL, any other action is
1293                 # added to the URL
1294                 if (defined $params{'action'}) {
1295                         $href .= "/".esc_path_info($params{'action'})
1296                                 unless $params{'action'} eq 'summary';
1297                         delete $params{'action'};
1298                 }
1299
1300                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1301                 # stripping nonexistent or useless pieces
1302                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1303                         || $params{'hash_parent'} || $params{'hash'});
1304                 if (defined $params{'hash_base'}) {
1305                         if (defined $params{'hash_parent_base'}) {
1306                                 $href .= esc_path_info($params{'hash_parent_base'});
1307                                 # skip the file_parent if it's the same as the file_name
1308                                 if (defined $params{'file_parent'}) {
1309                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1310                                                 delete $params{'file_parent'};
1311                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1312                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1313                                                 delete $params{'file_parent'};
1314                                         }
1315                                 }
1316                                 $href .= "..";
1317                                 delete $params{'hash_parent'};
1318                                 delete $params{'hash_parent_base'};
1319                         } elsif (defined $params{'hash_parent'}) {
1320                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1321                                 delete $params{'hash_parent'};
1322                         }
1323
1324                         $href .= esc_path_info($params{'hash_base'});
1325                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1326                                 $href .= ":/".esc_path_info($params{'file_name'});
1327                                 delete $params{'file_name'};
1328                         }
1329                         delete $params{'hash'};
1330                         delete $params{'hash_base'};
1331                 } elsif (defined $params{'hash'}) {
1332                         $href .= esc_path_info($params{'hash'});
1333                         delete $params{'hash'};
1334                 }
1335
1336                 # If the action was a snapshot, we can absorb the
1337                 # snapshot_format parameter too
1338                 if ($is_snapshot) {
1339                         my $fmt = $params{'snapshot_format'};
1340                         # snapshot_format should always be defined when href()
1341                         # is called, but just in case some code forgets, we
1342                         # fall back to the default
1343                         $fmt ||= $snapshot_fmts[0];
1344                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1345                         delete $params{'snapshot_format'};
1346                 }
1347         }
1348
1349         # now encode the parameters explicitly
1350         my @result = ();
1351         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1352                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1353                 if (defined $params{$name}) {
1354                         if (ref($params{$name}) eq "ARRAY") {
1355                                 foreach my $par (@{$params{$name}}) {
1356                                         push @result, $symbol . "=" . esc_param($par);
1357                                 }
1358                         } else {
1359                                 push @result, $symbol . "=" . esc_param($params{$name});
1360                         }
1361                 }
1362         }
1363         $href .= "?" . join(';', @result) if scalar @result;
1364
1365         # final transformation: trailing spaces must be escaped (URI-encoded)
1366         $href =~ s/(\s+)$/CGI::escape($1)/e;
1367
1368         if ($params{-anchor}) {
1369                 $href .= "#".esc_param($params{-anchor});
1370         }
1371
1372         return $href;
1373 }
1374
1375
1376 ## ======================================================================
1377 ## validation, quoting/unquoting and escaping
1378
1379 sub validate_action {
1380         my $input = shift || return undef;
1381         return undef unless exists $actions{$input};
1382         return $input;
1383 }
1384
1385 sub validate_project {
1386         my $input = shift || return undef;
1387         if (!validate_pathname($input) ||
1388                 !(-d "$projectroot/$input") ||
1389                 !check_export_ok("$projectroot/$input") ||
1390                 ($strict_export && !project_in_list($input))) {
1391                 return undef;
1392         } else {
1393                 return $input;
1394         }
1395 }
1396
1397 sub validate_pathname {
1398         my $input = shift || return undef;
1399
1400         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1401         # at the beginning, at the end, and between slashes.
1402         # also this catches doubled slashes
1403         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1404                 return undef;
1405         }
1406         # no null characters
1407         if ($input =~ m!\0!) {
1408                 return undef;
1409         }
1410         return $input;
1411 }
1412
1413 sub validate_refname {
1414         my $input = shift || return undef;
1415
1416         # textual hashes are O.K.
1417         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1418                 return $input;
1419         }
1420         # it must be correct pathname
1421         $input = validate_pathname($input)
1422                 or return undef;
1423         # restrictions on ref name according to git-check-ref-format
1424         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1425                 return undef;
1426         }
1427         return $input;
1428 }
1429
1430 # decode sequences of octets in utf8 into Perl's internal form,
1431 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1432 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1433 sub to_utf8 {
1434         my $str = shift;
1435         return undef unless defined $str;
1436         if (utf8::valid($str)) {
1437                 utf8::decode($str);
1438                 return $str;
1439         } else {
1440                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1441         }
1442 }
1443
1444 # quote unsafe chars, but keep the slash, even when it's not
1445 # correct, but quoted slashes look too horrible in bookmarks
1446 sub esc_param {
1447         my $str = shift;
1448         return undef unless defined $str;
1449         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1450         $str =~ s/ /\+/g;
1451         return $str;
1452 }
1453
1454 # the quoting rules for path_info fragment are slightly different
1455 sub esc_path_info {
1456         my $str = shift;
1457         return undef unless defined $str;
1458
1459         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1460         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1461
1462         return $str;
1463 }
1464
1465 # quote unsafe chars in whole URL, so some characters cannot be quoted
1466 sub esc_url {
1467         my $str = shift;
1468         return undef unless defined $str;
1469         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1470         $str =~ s/ /\+/g;
1471         return $str;
1472 }
1473
1474 # quote unsafe characters in HTML attributes
1475 sub esc_attr {
1476
1477         # for XHTML conformance escaping '"' to '&quot;' is not enough
1478         return esc_html(@_);
1479 }
1480
1481 # replace invalid utf8 character with SUBSTITUTION sequence
1482 sub esc_html {
1483         my $str = shift;
1484         my %opts = @_;
1485
1486         return undef unless defined $str;
1487
1488         $str = to_utf8($str);
1489         $str = $cgi->escapeHTML($str);
1490         if ($opts{'-nbsp'}) {
1491                 $str =~ s/ /&nbsp;/g;
1492         }
1493         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1494         return $str;
1495 }
1496
1497 # quote control characters and escape filename to HTML
1498 sub esc_path {
1499         my $str = shift;
1500         my %opts = @_;
1501
1502         return undef unless defined $str;
1503
1504         $str = to_utf8($str);
1505         $str = $cgi->escapeHTML($str);
1506         if ($opts{'-nbsp'}) {
1507                 $str =~ s/ /&nbsp;/g;
1508         }
1509         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1510         return $str;
1511 }
1512
1513 # Make control characters "printable", using character escape codes (CEC)
1514 sub quot_cec {
1515         my $cntrl = shift;
1516         my %opts = @_;
1517         my %es = ( # character escape codes, aka escape sequences
1518                 "\t" => '\t',   # tab            (HT)
1519                 "\n" => '\n',   # line feed      (LF)
1520                 "\r" => '\r',   # carrige return (CR)
1521                 "\f" => '\f',   # form feed      (FF)
1522                 "\b" => '\b',   # backspace      (BS)
1523                 "\a" => '\a',   # alarm (bell)   (BEL)
1524                 "\e" => '\e',   # escape         (ESC)
1525                 "\013" => '\v', # vertical tab   (VT)
1526                 "\000" => '\0', # nul character  (NUL)
1527         );
1528         my $chr = ( (exists $es{$cntrl})
1529                     ? $es{$cntrl}
1530                     : sprintf('\%2x', ord($cntrl)) );
1531         if ($opts{-nohtml}) {
1532                 return $chr;
1533         } else {
1534                 return "<span class=\"cntrl\">$chr</span>";
1535         }
1536 }
1537
1538 # Alternatively use unicode control pictures codepoints,
1539 # Unicode "printable representation" (PR)
1540 sub quot_upr {
1541         my $cntrl = shift;
1542         my %opts = @_;
1543
1544         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1545         if ($opts{-nohtml}) {
1546                 return $chr;
1547         } else {
1548                 return "<span class=\"cntrl\">$chr</span>";
1549         }
1550 }
1551
1552 # git may return quoted and escaped filenames
1553 sub unquote {
1554         my $str = shift;
1555
1556         sub unq {
1557                 my $seq = shift;
1558                 my %es = ( # character escape codes, aka escape sequences
1559                         't' => "\t",   # tab            (HT, TAB)
1560                         'n' => "\n",   # newline        (NL)
1561                         'r' => "\r",   # return         (CR)
1562                         'f' => "\f",   # form feed      (FF)
1563                         'b' => "\b",   # backspace      (BS)
1564                         'a' => "\a",   # alarm (bell)   (BEL)
1565                         'e' => "\e",   # escape         (ESC)
1566                         'v' => "\013", # vertical tab   (VT)
1567                 );
1568
1569                 if ($seq =~ m/^[0-7]{1,3}$/) {
1570                         # octal char sequence
1571                         return chr(oct($seq));
1572                 } elsif (exists $es{$seq}) {
1573                         # C escape sequence, aka character escape code
1574                         return $es{$seq};
1575                 }
1576                 # quoted ordinary character
1577                 return $seq;
1578         }
1579
1580         if ($str =~ m/^"(.*)"$/) {
1581                 # needs unquoting
1582                 $str = $1;
1583                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1584         }
1585         return $str;
1586 }
1587
1588 # escape tabs (convert tabs to spaces)
1589 sub untabify {
1590         my $line = shift;
1591
1592         while ((my $pos = index($line, "\t")) != -1) {
1593                 if (my $count = (8 - ($pos % 8))) {
1594                         my $spaces = ' ' x $count;
1595                         $line =~ s/\t/$spaces/;
1596                 }
1597         }
1598
1599         return $line;
1600 }
1601
1602 sub project_in_list {
1603         my $project = shift;
1604         my @list = git_get_projects_list();
1605         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1606 }
1607
1608 ## ----------------------------------------------------------------------
1609 ## HTML aware string manipulation
1610
1611 # Try to chop given string on a word boundary between position
1612 # $len and $len+$add_len. If there is no word boundary there,
1613 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1614 # (marking chopped part) would be longer than given string.
1615 sub chop_str {
1616         my $str = shift;
1617         my $len = shift;
1618         my $add_len = shift || 10;
1619         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1620
1621         # Make sure perl knows it is utf8 encoded so we don't
1622         # cut in the middle of a utf8 multibyte char.
1623         $str = to_utf8($str);
1624
1625         # allow only $len chars, but don't cut a word if it would fit in $add_len
1626         # if it doesn't fit, cut it if it's still longer than the dots we would add
1627         # remove chopped character entities entirely
1628
1629         # when chopping in the middle, distribute $len into left and right part
1630         # return early if chopping wouldn't make string shorter
1631         if ($where eq 'center') {
1632                 return $str if ($len + 5 >= length($str)); # filler is length 5
1633                 $len = int($len/2);
1634         } else {
1635                 return $str if ($len + 4 >= length($str)); # filler is length 4
1636         }
1637
1638         # regexps: ending and beginning with word part up to $add_len
1639         my $endre = qr/.{$len}\w{0,$add_len}/;
1640         my $begre = qr/\w{0,$add_len}.{$len}/;
1641
1642         if ($where eq 'left') {
1643                 $str =~ m/^(.*?)($begre)$/;
1644                 my ($lead, $body) = ($1, $2);
1645                 if (length($lead) > 4) {
1646                         $lead = " ...";
1647                 }
1648                 return "$lead$body";
1649
1650         } elsif ($where eq 'center') {
1651                 $str =~ m/^($endre)(.*)$/;
1652                 my ($left, $str)  = ($1, $2);
1653                 $str =~ m/^(.*?)($begre)$/;
1654                 my ($mid, $right) = ($1, $2);
1655                 if (length($mid) > 5) {
1656                         $mid = " ... ";
1657                 }
1658                 return "$left$mid$right";
1659
1660         } else {
1661                 $str =~ m/^($endre)(.*)$/;
1662                 my $body = $1;
1663                 my $tail = $2;
1664                 if (length($tail) > 4) {
1665                         $tail = "... ";
1666                 }
1667                 return "$body$tail";
1668         }
1669 }
1670
1671 # takes the same arguments as chop_str, but also wraps a <span> around the
1672 # result with a title attribute if it does get chopped. Additionally, the
1673 # string is HTML-escaped.
1674 sub chop_and_escape_str {
1675         my ($str) = @_;
1676
1677         my $chopped = chop_str(@_);
1678         if ($chopped eq $str) {
1679                 return esc_html($chopped);
1680         } else {
1681                 $str =~ s/[[:cntrl:]]/?/g;
1682                 return $cgi->span({-title=>$str}, esc_html($chopped));
1683         }
1684 }
1685
1686 ## ----------------------------------------------------------------------
1687 ## functions returning short strings
1688
1689 # CSS class for given age value (in seconds)
1690 sub age_class {
1691         my $age = shift;
1692
1693         if (!defined $age) {
1694                 return "noage";
1695         } elsif ($age < 60*60*2) {
1696                 return "age0";
1697         } elsif ($age < 60*60*24*2) {
1698                 return "age1";
1699         } else {
1700                 return "age2";
1701         }
1702 }
1703
1704 # convert age in seconds to "nn units ago" string
1705 sub age_string {
1706         my $age = shift;
1707         my $age_str;
1708
1709         if ($age > 60*60*24*365*2) {
1710                 $age_str = (int $age/60/60/24/365);
1711                 $age_str .= " years ago";
1712         } elsif ($age > 60*60*24*(365/12)*2) {
1713                 $age_str = int $age/60/60/24/(365/12);
1714                 $age_str .= " months ago";
1715         } elsif ($age > 60*60*24*7*2) {
1716                 $age_str = int $age/60/60/24/7;
1717                 $age_str .= " weeks ago";
1718         } elsif ($age > 60*60*24*2) {
1719                 $age_str = int $age/60/60/24;
1720                 $age_str .= " days ago";
1721         } elsif ($age > 60*60*2) {
1722                 $age_str = int $age/60/60;
1723                 $age_str .= " hours ago";
1724         } elsif ($age > 60*2) {
1725                 $age_str = int $age/60;
1726                 $age_str .= " min ago";
1727         } elsif ($age > 2) {
1728                 $age_str = int $age;
1729                 $age_str .= " sec ago";
1730         } else {
1731                 $age_str .= " right now";
1732         }
1733         return $age_str;
1734 }
1735
1736 use constant {
1737         S_IFINVALID => 0030000,
1738         S_IFGITLINK => 0160000,
1739 };
1740
1741 # submodule/subproject, a commit object reference
1742 sub S_ISGITLINK {
1743         my $mode = shift;
1744
1745         return (($mode & S_IFMT) == S_IFGITLINK)
1746 }
1747
1748 # convert file mode in octal to symbolic file mode string
1749 sub mode_str {
1750         my $mode = oct shift;
1751
1752         if (S_ISGITLINK($mode)) {
1753                 return 'm---------';
1754         } elsif (S_ISDIR($mode & S_IFMT)) {
1755                 return 'drwxr-xr-x';
1756         } elsif (S_ISLNK($mode)) {
1757                 return 'lrwxrwxrwx';
1758         } elsif (S_ISREG($mode)) {
1759                 # git cares only about the executable bit
1760                 if ($mode & S_IXUSR) {
1761                         return '-rwxr-xr-x';
1762                 } else {
1763                         return '-rw-r--r--';
1764                 };
1765         } else {
1766                 return '----------';
1767         }
1768 }
1769
1770 # convert file mode in octal to file type string
1771 sub file_type {
1772         my $mode = shift;
1773
1774         if ($mode !~ m/^[0-7]+$/) {
1775                 return $mode;
1776         } else {
1777                 $mode = oct $mode;
1778         }
1779
1780         if (S_ISGITLINK($mode)) {
1781                 return "submodule";
1782         } elsif (S_ISDIR($mode & S_IFMT)) {
1783                 return "directory";
1784         } elsif (S_ISLNK($mode)) {
1785                 return "symlink";
1786         } elsif (S_ISREG($mode)) {
1787                 return "file";
1788         } else {
1789                 return "unknown";
1790         }
1791 }
1792
1793 # convert file mode in octal to file type description string
1794 sub file_type_long {
1795         my $mode = shift;
1796
1797         if ($mode !~ m/^[0-7]+$/) {
1798                 return $mode;
1799         } else {
1800                 $mode = oct $mode;
1801         }
1802
1803         if (S_ISGITLINK($mode)) {
1804                 return "submodule";
1805         } elsif (S_ISDIR($mode & S_IFMT)) {
1806                 return "directory";
1807         } elsif (S_ISLNK($mode)) {
1808                 return "symlink";
1809         } elsif (S_ISREG($mode)) {
1810                 if ($mode & S_IXUSR) {
1811                         return "executable";
1812                 } else {
1813                         return "file";
1814                 };
1815         } else {
1816                 return "unknown";
1817         }
1818 }
1819
1820
1821 ## ----------------------------------------------------------------------
1822 ## functions returning short HTML fragments, or transforming HTML fragments
1823 ## which don't belong to other sections
1824
1825 # format line of commit message.
1826 sub format_log_line_html {
1827         my $line = shift;
1828
1829         $line = esc_html($line, -nbsp=>1);
1830         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1831                 $cgi->a({-href => href(action=>"object", hash=>$1),
1832                                         -class => "text"}, $1);
1833         }eg;
1834
1835         return $line;
1836 }
1837
1838 # format marker of refs pointing to given object
1839
1840 # the destination action is chosen based on object type and current context:
1841 # - for annotated tags, we choose the tag view unless it's the current view
1842 #   already, in which case we go to shortlog view
1843 # - for other refs, we keep the current view if we're in history, shortlog or
1844 #   log view, and select shortlog otherwise
1845 sub format_ref_marker {
1846         my ($refs, $id) = @_;
1847         my $markers = '';
1848
1849         if (defined $refs->{$id}) {
1850                 foreach my $ref (@{$refs->{$id}}) {
1851                         # this code exploits the fact that non-lightweight tags are the
1852                         # only indirect objects, and that they are the only objects for which
1853                         # we want to use tag instead of shortlog as action
1854                         my ($type, $name) = qw();
1855                         my $indirect = ($ref =~ s/\^\{\}$//);
1856                         # e.g. tags/v2.6.11 or heads/next
1857                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1858                                 $type = $1;
1859                                 $name = $2;
1860                         } else {
1861                                 $type = "ref";
1862                                 $name = $ref;
1863                         }
1864
1865                         my $class = $type;
1866                         $class .= " indirect" if $indirect;
1867
1868                         my $dest_action = "shortlog";
1869
1870                         if ($indirect) {
1871                                 $dest_action = "tag" unless $action eq "tag";
1872                         } elsif ($action =~ /^(history|(short)?log)$/) {
1873                                 $dest_action = $action;
1874                         }
1875
1876                         my $dest = "";
1877                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1878                         $dest .= $ref;
1879
1880                         my $link = $cgi->a({
1881                                 -href => href(
1882                                         action=>$dest_action,
1883                                         hash=>$dest
1884                                 )}, $name);
1885
1886                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1887                                 $link . "</span>";
1888                 }
1889         }
1890
1891         if ($markers) {
1892                 return ' <span class="refs">'. $markers . '</span>';
1893         } else {
1894                 return "";
1895         }
1896 }
1897
1898 # format, perhaps shortened and with markers, title line
1899 sub format_subject_html {
1900         my ($long, $short, $href, $extra) = @_;
1901         $extra = '' unless defined($extra);
1902
1903         if (length($short) < length($long)) {
1904                 $long =~ s/[[:cntrl:]]/?/g;
1905                 return $cgi->a({-href => $href, -class => "list subject",
1906                                 -title => to_utf8($long)},
1907                        esc_html($short)) . $extra;
1908         } else {
1909                 return $cgi->a({-href => $href, -class => "list subject"},
1910                        esc_html($long)) . $extra;
1911         }
1912 }
1913
1914 # Rather than recomputing the url for an email multiple times, we cache it
1915 # after the first hit. This gives a visible benefit in views where the avatar
1916 # for the same email is used repeatedly (e.g. shortlog).
1917 # The cache is shared by all avatar engines (currently gravatar only), which
1918 # are free to use it as preferred. Since only one avatar engine is used for any
1919 # given page, there's no risk for cache conflicts.
1920 our %avatar_cache = ();
1921
1922 # Compute the picon url for a given email, by using the picon search service over at
1923 # http://www.cs.indiana.edu/picons/search.html
1924 sub picon_url {
1925         my $email = lc shift;
1926         if (!$avatar_cache{$email}) {
1927                 my ($user, $domain) = split('@', $email);
1928                 $avatar_cache{$email} =
1929                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1930                         "$domain/$user/" .
1931                         "users+domains+unknown/up/single";
1932         }
1933         return $avatar_cache{$email};
1934 }
1935
1936 # Compute the gravatar url for a given email, if it's not in the cache already.
1937 # Gravatar stores only the part of the URL before the size, since that's the
1938 # one computationally more expensive. This also allows reuse of the cache for
1939 # different sizes (for this particular engine).
1940 sub gravatar_url {
1941         my $email = lc shift;
1942         my $size = shift;
1943         $avatar_cache{$email} ||=
1944                 "http://www.gravatar.com/avatar/" .
1945                         Digest::MD5::md5_hex($email) . "?s=";
1946         return $avatar_cache{$email} . $size;
1947 }
1948
1949 # Insert an avatar for the given $email at the given $size if the feature
1950 # is enabled.
1951 sub git_get_avatar {
1952         my ($email, %opts) = @_;
1953         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1954         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1955         $opts{-size} ||= 'default';
1956         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1957         my $url = "";
1958         if ($git_avatar eq 'gravatar') {
1959                 $url = gravatar_url($email, $size);
1960         } elsif ($git_avatar eq 'picon') {
1961                 $url = picon_url($email);
1962         }
1963         # Other providers can be added by extending the if chain, defining $url
1964         # as needed. If no variant puts something in $url, we assume avatars
1965         # are completely disabled/unavailable.
1966         if ($url) {
1967                 return $pre_white .
1968                        "<img width=\"$size\" " .
1969                             "class=\"avatar\" " .
1970                             "src=\"".esc_url($url)."\" " .
1971                             "alt=\"\" " .
1972                        "/>" . $post_white;
1973         } else {
1974                 return "";
1975         }
1976 }
1977
1978 sub format_search_author {
1979         my ($author, $searchtype, $displaytext) = @_;
1980         my $have_search = gitweb_check_feature('search');
1981
1982         if ($have_search) {
1983                 my $performed = "";
1984                 if ($searchtype eq 'author') {
1985                         $performed = "authored";
1986                 } elsif ($searchtype eq 'committer') {
1987                         $performed = "committed";
1988                 }
1989
1990                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1991                                 searchtext=>$author,
1992                                 searchtype=>$searchtype), class=>"list",
1993                                 title=>"Search for commits $performed by $author"},
1994                                 $displaytext);
1995
1996         } else {
1997                 return $displaytext;
1998         }
1999 }
2000
2001 # format the author name of the given commit with the given tag
2002 # the author name is chopped and escaped according to the other
2003 # optional parameters (see chop_str).
2004 sub format_author_html {
2005         my $tag = shift;
2006         my $co = shift;
2007         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2008         return "<$tag class=\"author\">" .
2009                format_search_author($co->{'author_name'}, "author",
2010                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2011                        $author) .
2012                "</$tag>";
2013 }
2014
2015 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2016 sub format_git_diff_header_line {
2017         my $line = shift;
2018         my $diffinfo = shift;
2019         my ($from, $to) = @_;
2020
2021         if ($diffinfo->{'nparents'}) {
2022                 # combined diff
2023                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2024                 if ($to->{'href'}) {
2025                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2026                                          esc_path($to->{'file'}));
2027                 } else { # file was deleted (no href)
2028                         $line .= esc_path($to->{'file'});
2029                 }
2030         } else {
2031                 # "ordinary" diff
2032                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2033                 if ($from->{'href'}) {
2034                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2035                                          'a/' . esc_path($from->{'file'}));
2036                 } else { # file was added (no href)
2037                         $line .= 'a/' . esc_path($from->{'file'});
2038                 }
2039                 $line .= ' ';
2040                 if ($to->{'href'}) {
2041                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2042                                          'b/' . esc_path($to->{'file'}));
2043                 } else { # file was deleted
2044                         $line .= 'b/' . esc_path($to->{'file'});
2045                 }
2046         }
2047
2048         return "<div class=\"diff header\">$line</div>\n";
2049 }
2050
2051 # format extended diff header line, before patch itself
2052 sub format_extended_diff_header_line {
2053         my $line = shift;
2054         my $diffinfo = shift;
2055         my ($from, $to) = @_;
2056
2057         # match <path>
2058         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2059                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2060                                        esc_path($from->{'file'}));
2061         }
2062         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2063                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2064                                  esc_path($to->{'file'}));
2065         }
2066         # match single <mode>
2067         if ($line =~ m/\s(\d{6})$/) {
2068                 $line .= '<span class="info"> (' .
2069                          file_type_long($1) .
2070                          ')</span>';
2071         }
2072         # match <hash>
2073         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2074                 # can match only for combined diff
2075                 $line = 'index ';
2076                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2077                         if ($from->{'href'}[$i]) {
2078                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2079                                                   -class=>"hash"},
2080                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2081                         } else {
2082                                 $line .= '0' x 7;
2083                         }
2084                         # separator
2085                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2086                 }
2087                 $line .= '..';
2088                 if ($to->{'href'}) {
2089                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2090                                          substr($diffinfo->{'to_id'},0,7));
2091                 } else {
2092                         $line .= '0' x 7;
2093                 }
2094
2095         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2096                 # can match only for ordinary diff
2097                 my ($from_link, $to_link);
2098                 if ($from->{'href'}) {
2099                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2100                                              substr($diffinfo->{'from_id'},0,7));
2101                 } else {
2102                         $from_link = '0' x 7;
2103                 }
2104                 if ($to->{'href'}) {
2105                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2106                                            substr($diffinfo->{'to_id'},0,7));
2107                 } else {
2108                         $to_link = '0' x 7;
2109                 }
2110                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2111                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2112         }
2113
2114         return $line . "<br/>\n";
2115 }
2116
2117 # format from-file/to-file diff header
2118 sub format_diff_from_to_header {
2119         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2120         my $line;
2121         my $result = '';
2122
2123         $line = $from_line;
2124         #assert($line =~ m/^---/) if DEBUG;
2125         # no extra formatting for "^--- /dev/null"
2126         if (! $diffinfo->{'nparents'}) {
2127                 # ordinary (single parent) diff
2128                 if ($line =~ m!^--- "?a/!) {
2129                         if ($from->{'href'}) {
2130                                 $line = '--- a/' .
2131                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2132                                                 esc_path($from->{'file'}));
2133                         } else {
2134                                 $line = '--- a/' .
2135                                         esc_path($from->{'file'});
2136                         }
2137                 }
2138                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2139
2140         } else {
2141                 # combined diff (merge commit)
2142                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2143                         if ($from->{'href'}[$i]) {
2144                                 $line = '--- ' .
2145                                         $cgi->a({-href=>href(action=>"blobdiff",
2146                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2147                                                              hash_parent_base=>$parents[$i],
2148                                                              file_parent=>$from->{'file'}[$i],
2149                                                              hash=>$diffinfo->{'to_id'},
2150                                                              hash_base=>$hash,
2151                                                              file_name=>$to->{'file'}),
2152                                                  -class=>"path",
2153                                                  -title=>"diff" . ($i+1)},
2154                                                 $i+1) .
2155                                         '/' .
2156                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2157                                                 esc_path($from->{'file'}[$i]));
2158                         } else {
2159                                 $line = '--- /dev/null';
2160                         }
2161                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2162                 }
2163         }
2164
2165         $line = $to_line;
2166         #assert($line =~ m/^\+\+\+/) if DEBUG;
2167         # no extra formatting for "^+++ /dev/null"
2168         if ($line =~ m!^\+\+\+ "?b/!) {
2169                 if ($to->{'href'}) {
2170                         $line = '+++ b/' .
2171                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2172                                         esc_path($to->{'file'}));
2173                 } else {
2174                         $line = '+++ b/' .
2175                                 esc_path($to->{'file'});
2176                 }
2177         }
2178         $result .= qq!<div class="diff to_file">$line</div>\n!;
2179
2180         return $result;
2181 }
2182
2183 # create note for patch simplified by combined diff
2184 sub format_diff_cc_simplified {
2185         my ($diffinfo, @parents) = @_;
2186         my $result = '';
2187
2188         $result .= "<div class=\"diff header\">" .
2189                    "diff --cc ";
2190         if (!is_deleted($diffinfo)) {
2191                 $result .= $cgi->a({-href => href(action=>"blob",
2192                                                   hash_base=>$hash,
2193                                                   hash=>$diffinfo->{'to_id'},
2194                                                   file_name=>$diffinfo->{'to_file'}),
2195                                     -class => "path"},
2196                                    esc_path($diffinfo->{'to_file'}));
2197         } else {
2198                 $result .= esc_path($diffinfo->{'to_file'});
2199         }
2200         $result .= "</div>\n" . # class="diff header"
2201                    "<div class=\"diff nodifferences\">" .
2202                    "Simple merge" .
2203                    "</div>\n"; # class="diff nodifferences"
2204
2205         return $result;
2206 }
2207
2208 # format patch (diff) line (not to be used for diff headers)
2209 sub format_diff_line {
2210         my $line = shift;
2211         my ($from, $to) = @_;
2212         my $diff_class = "";
2213
2214         chomp $line;
2215
2216         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2217                 # combined diff
2218                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2219                 if ($line =~ m/^\@{3}/) {
2220                         $diff_class = " chunk_header";
2221                 } elsif ($line =~ m/^\\/) {
2222                         $diff_class = " incomplete";
2223                 } elsif ($prefix =~ tr/+/+/) {
2224                         $diff_class = " add";
2225                 } elsif ($prefix =~ tr/-/-/) {
2226                         $diff_class = " rem";
2227                 }
2228         } else {
2229                 # assume ordinary diff
2230                 my $char = substr($line, 0, 1);
2231                 if ($char eq '+') {
2232                         $diff_class = " add";
2233                 } elsif ($char eq '-') {
2234                         $diff_class = " rem";
2235                 } elsif ($char eq '@') {
2236                         $diff_class = " chunk_header";
2237                 } elsif ($char eq "\\") {
2238                         $diff_class = " incomplete";
2239                 }
2240         }
2241         $line = untabify($line);
2242         if ($from && $to && $line =~ m/^\@{2} /) {
2243                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2244                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2245
2246                 $from_lines = 0 unless defined $from_lines;
2247                 $to_lines   = 0 unless defined $to_lines;
2248
2249                 if ($from->{'href'}) {
2250                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2251                                              -class=>"list"}, $from_text);
2252                 }
2253                 if ($to->{'href'}) {
2254                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2255                                              -class=>"list"}, $to_text);
2256                 }
2257                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2258                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2259                 return "<div class=\"diff$diff_class\">$line</div>\n";
2260         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2261                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2262                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2263
2264                 @from_text = split(' ', $ranges);
2265                 for (my $i = 0; $i < @from_text; ++$i) {
2266                         ($from_start[$i], $from_nlines[$i]) =
2267                                 (split(',', substr($from_text[$i], 1)), 0);
2268                 }
2269
2270                 $to_text   = pop @from_text;
2271                 $to_start  = pop @from_start;
2272                 $to_nlines = pop @from_nlines;
2273
2274                 $line = "<span class=\"chunk_info\">$prefix ";
2275                 for (my $i = 0; $i < @from_text; ++$i) {
2276                         if ($from->{'href'}[$i]) {
2277                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2278                                                   -class=>"list"}, $from_text[$i]);
2279                         } else {
2280                                 $line .= $from_text[$i];
2281                         }
2282                         $line .= " ";
2283                 }
2284                 if ($to->{'href'}) {
2285                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2286                                           -class=>"list"}, $to_text);
2287                 } else {
2288                         $line .= $to_text;
2289                 }
2290                 $line .= " $prefix</span>" .
2291                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2292                 return "<div class=\"diff$diff_class\">$line</div>\n";
2293         }
2294         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2295 }
2296
2297 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2298 # linked.  Pass the hash of the tree/commit to snapshot.
2299 sub format_snapshot_links {
2300         my ($hash) = @_;
2301         my $num_fmts = @snapshot_fmts;
2302         if ($num_fmts > 1) {
2303                 # A parenthesized list of links bearing format names.
2304                 # e.g. "snapshot (_tar.gz_ _zip_)"
2305                 return "snapshot (" . join(' ', map
2306                         $cgi->a({
2307                                 -href => href(
2308                                         action=>"snapshot",
2309                                         hash=>$hash,
2310                                         snapshot_format=>$_
2311                                 )
2312                         }, $known_snapshot_formats{$_}{'display'})
2313                 , @snapshot_fmts) . ")";
2314         } elsif ($num_fmts == 1) {
2315                 # A single "snapshot" link whose tooltip bears the format name.
2316                 # i.e. "_snapshot_"
2317                 my ($fmt) = @snapshot_fmts;
2318                 return
2319                         $cgi->a({
2320                                 -href => href(
2321                                         action=>"snapshot",
2322                                         hash=>$hash,
2323                                         snapshot_format=>$fmt
2324                                 ),
2325                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2326                         }, "snapshot");
2327         } else { # $num_fmts == 0
2328                 return undef;
2329         }
2330 }
2331
2332 ## ......................................................................
2333 ## functions returning values to be passed, perhaps after some
2334 ## transformation, to other functions; e.g. returning arguments to href()
2335
2336 # returns hash to be passed to href to generate gitweb URL
2337 # in -title key it returns description of link
2338 sub get_feed_info {
2339         my $format = shift || 'Atom';
2340         my %res = (action => lc($format));
2341
2342         # feed links are possible only for project views
2343         return unless (defined $project);
2344         # some views should link to OPML, or to generic project feed,
2345         # or don't have specific feed yet (so they should use generic)
2346         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2347
2348         my $branch;
2349         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2350         # from tag links; this also makes possible to detect branch links
2351         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2352             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2353                 $branch = $1;
2354         }
2355         # find log type for feed description (title)
2356         my $type = 'log';
2357         if (defined $file_name) {
2358                 $type  = "history of $file_name";
2359                 $type .= "/" if ($action eq 'tree');
2360                 $type .= " on '$branch'" if (defined $branch);
2361         } else {
2362                 $type = "log of $branch" if (defined $branch);
2363         }
2364
2365         $res{-title} = $type;
2366         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2367         $res{'file_name'} = $file_name;
2368
2369         return %res;
2370 }
2371
2372 ## ----------------------------------------------------------------------
2373 ## git utility subroutines, invoking git commands
2374
2375 # returns path to the core git executable and the --git-dir parameter as list
2376 sub git_cmd {
2377         $number_of_git_cmds++;
2378         return $GIT, '--git-dir='.$git_dir;
2379 }
2380
2381 # quote the given arguments for passing them to the shell
2382 # quote_command("command", "arg 1", "arg with ' and ! characters")
2383 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2384 # Try to avoid using this function wherever possible.
2385 sub quote_command {
2386         return join(' ',
2387                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2388 }
2389
2390 # get HEAD ref of given project as hash
2391 sub git_get_head_hash {
2392         return git_get_full_hash(shift, 'HEAD');
2393 }
2394
2395 sub git_get_full_hash {
2396         return git_get_hash(@_);
2397 }
2398
2399 sub git_get_short_hash {
2400         return git_get_hash(@_, '--short=7');
2401 }
2402
2403 sub git_get_hash {
2404         my ($project, $hash, @options) = @_;
2405         my $o_git_dir = $git_dir;
2406         my $retval = undef;
2407         $git_dir = "$projectroot/$project";
2408         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2409             '--verify', '-q', @options, $hash) {
2410                 $retval = <$fd>;
2411                 chomp $retval if defined $retval;
2412                 close $fd;
2413         }
2414         if (defined $o_git_dir) {
2415                 $git_dir = $o_git_dir;
2416         }
2417         return $retval;
2418 }
2419
2420 # get type of given object
2421 sub git_get_type {
2422         my $hash = shift;
2423
2424         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2425         my $type = <$fd>;
2426         close $fd or return;
2427         chomp $type;
2428         return $type;
2429 }
2430
2431 # repository configuration
2432 our $config_file = '';
2433 our %config;
2434
2435 # store multiple values for single key as anonymous array reference
2436 # single values stored directly in the hash, not as [ <value> ]
2437 sub hash_set_multi {
2438         my ($hash, $key, $value) = @_;
2439
2440         if (!exists $hash->{$key}) {
2441                 $hash->{$key} = $value;
2442         } elsif (!ref $hash->{$key}) {
2443                 $hash->{$key} = [ $hash->{$key}, $value ];
2444         } else {
2445                 push @{$hash->{$key}}, $value;
2446         }
2447 }
2448
2449 # return hash of git project configuration
2450 # optionally limited to some section, e.g. 'gitweb'
2451 sub git_parse_project_config {
2452         my $section_regexp = shift;
2453         my %config;
2454
2455         local $/ = "\0";
2456
2457         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2458                 or return;
2459
2460         while (my $keyval = <$fh>) {
2461                 chomp $keyval;
2462                 my ($key, $value) = split(/\n/, $keyval, 2);
2463
2464                 hash_set_multi(\%config, $key, $value)
2465                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2466         }
2467         close $fh;
2468
2469         return %config;
2470 }
2471
2472 # convert config value to boolean: 'true' or 'false'
2473 # no value, number > 0, 'true' and 'yes' values are true
2474 # rest of values are treated as false (never as error)
2475 sub config_to_bool {
2476         my $val = shift;
2477
2478         return 1 if !defined $val;             # section.key
2479
2480         # strip leading and trailing whitespace
2481         $val =~ s/^\s+//;
2482         $val =~ s/\s+$//;
2483
2484         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2485                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2486 }
2487
2488 # convert config value to simple decimal number
2489 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2490 # to be multiplied by 1024, 1048576, or 1073741824
2491 sub config_to_int {
2492         my $val = shift;
2493
2494         # strip leading and trailing whitespace
2495         $val =~ s/^\s+//;
2496         $val =~ s/\s+$//;
2497
2498         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2499                 $unit = lc($unit);
2500                 # unknown unit is treated as 1
2501                 return $num * ($unit eq 'g' ? 1073741824 :
2502                                $unit eq 'm' ?    1048576 :
2503                                $unit eq 'k' ?       1024 : 1);
2504         }
2505         return $val;
2506 }
2507
2508 # convert config value to array reference, if needed
2509 sub config_to_multi {
2510         my $val = shift;
2511
2512         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2513 }
2514
2515 sub git_get_project_config {
2516         my ($key, $type) = @_;
2517
2518         return unless defined $git_dir;
2519
2520         # key sanity check
2521         return unless ($key);
2522         $key =~ s/^gitweb\.//;
2523         return if ($key =~ m/\W/);
2524
2525         # type sanity check
2526         if (defined $type) {
2527                 $type =~ s/^--//;
2528                 $type = undef
2529                         unless ($type eq 'bool' || $type eq 'int');
2530         }
2531
2532         # get config
2533         if (!defined $config_file ||
2534             $config_file ne "$git_dir/config") {
2535                 %config = git_parse_project_config('gitweb');
2536                 $config_file = "$git_dir/config";
2537         }
2538
2539         # check if config variable (key) exists
2540         return unless exists $config{"gitweb.$key"};
2541
2542         # ensure given type
2543         if (!defined $type) {
2544                 return $config{"gitweb.$key"};
2545         } elsif ($type eq 'bool') {
2546                 # backward compatibility: 'git config --bool' returns true/false
2547                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2548         } elsif ($type eq 'int') {
2549                 return config_to_int($config{"gitweb.$key"});
2550         }
2551         return $config{"gitweb.$key"};
2552 }
2553
2554 # get hash of given path at given ref
2555 sub git_get_hash_by_path {
2556         my $base = shift;
2557         my $path = shift || return undef;
2558         my $type = shift;
2559
2560         $path =~ s,/+$,,;
2561
2562         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2563                 or die_error(500, "Open git-ls-tree failed");
2564         my $line = <$fd>;
2565         close $fd or return undef;
2566
2567         if (!defined $line) {
2568                 # there is no tree or hash given by $path at $base
2569                 return undef;
2570         }
2571
2572         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2573         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2574         if (defined $type && $type ne $2) {
2575                 # type doesn't match
2576                 return undef;
2577         }
2578         return $3;
2579 }
2580
2581 # get path of entry with given hash at given tree-ish (ref)
2582 # used to get 'from' filename for combined diff (merge commit) for renames
2583 sub git_get_path_by_hash {
2584         my $base = shift || return;
2585         my $hash = shift || return;
2586
2587         local $/ = "\0";
2588
2589         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2590                 or return undef;
2591         while (my $line = <$fd>) {
2592                 chomp $line;
2593
2594                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2595                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2596                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2597                         close $fd;
2598                         return $1;
2599                 }
2600         }
2601         close $fd;
2602         return undef;
2603 }
2604
2605 ## ......................................................................
2606 ## git utility functions, directly accessing git repository
2607
2608 # get the value of config variable either from file named as the variable
2609 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2610 # configuration variable in the repository config file.
2611 sub git_get_file_or_project_config {
2612         my ($path, $name) = @_;
2613
2614         $git_dir = "$projectroot/$path";
2615         open my $fd, '<', "$git_dir/$name"
2616                 or return git_get_project_config($name);
2617         my $conf = <$fd>;
2618         close $fd;
2619         if (defined $conf) {
2620                 chomp $conf;
2621         }
2622         return $conf;
2623 }
2624
2625 sub git_get_project_description {
2626         my $path = shift;
2627         return git_get_file_or_project_config($path, 'description');
2628 }
2629
2630 sub git_get_project_category {
2631         my $path = shift;
2632         return git_get_file_or_project_config($path, 'category');
2633 }
2634
2635
2636 # supported formats:
2637 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2638 #   - if its contents is a number, use it as tag weight,
2639 #   - otherwise add a tag with weight 1
2640 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2641 #   the same value multiple times increases tag weight
2642 # * `gitweb.ctag' multi-valued repo config variable
2643 sub git_get_project_ctags {
2644         my $project = shift;
2645         my $ctags = {};
2646
2647         $git_dir = "$projectroot/$project";
2648         if (opendir my $dh, "$git_dir/ctags") {
2649                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2650                 foreach my $tagfile (@files) {
2651                         open my $ct, '<', $tagfile
2652                                 or next;
2653                         my $val = <$ct>;
2654                         chomp $val if $val;
2655                         close $ct;
2656
2657                         (my $ctag = $tagfile) =~ s#.*/##;
2658                         if ($val =~ /^\d+$/) {
2659                                 $ctags->{$ctag} = $val;
2660                         } else {
2661                                 $ctags->{$ctag} = 1;
2662                         }
2663                 }
2664                 closedir $dh;
2665
2666         } elsif (open my $fh, '<', "$git_dir/ctags") {
2667                 while (my $line = <$fh>) {
2668                         chomp $line;
2669                         $ctags->{$line}++ if $line;
2670                 }
2671                 close $fh;
2672
2673         } else {
2674                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2675                 foreach my $tag (@$taglist) {
2676                         $ctags->{$tag}++;
2677                 }
2678         }
2679
2680         return $ctags;
2681 }
2682
2683 # return hash, where keys are content tags ('ctags'),
2684 # and values are sum of weights of given tag in every project
2685 sub git_gather_all_ctags {
2686         my $projects = shift;
2687         my $ctags = {};
2688
2689         foreach my $p (@$projects) {
2690                 foreach my $ct (keys %{$p->{'ctags'}}) {
2691                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2692                 }
2693         }
2694
2695         return $ctags;
2696 }
2697
2698 sub git_populate_project_tagcloud {
2699         my $ctags = shift;
2700
2701         # First, merge different-cased tags; tags vote on casing
2702         my %ctags_lc;
2703         foreach (keys %$ctags) {
2704                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2705                 if (not $ctags_lc{lc $_}->{topcount}
2706                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2707                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2708                         $ctags_lc{lc $_}->{topname} = $_;
2709                 }
2710         }
2711
2712         my $cloud;
2713         my $matched = $cgi->param('by_tag');
2714         if (eval { require HTML::TagCloud; 1; }) {
2715                 $cloud = HTML::TagCloud->new;
2716                 foreach my $ctag (sort keys %ctags_lc) {
2717                         # Pad the title with spaces so that the cloud looks
2718                         # less crammed.
2719                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2720                         $title =~ s/ /&nbsp;/g;
2721                         $title =~ s/^/&nbsp;/g;
2722                         $title =~ s/$/&nbsp;/g;
2723                         if (defined $matched && $matched eq $ctag) {
2724                                 $title = qq(<span class="match">$title</span>);
2725                         }
2726                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2727                                     $ctags_lc{$ctag}->{count});
2728                 }
2729         } else {
2730                 $cloud = {};
2731                 foreach my $ctag (keys %ctags_lc) {
2732                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2733                         if (defined $matched && $matched eq $ctag) {
2734                                 $title = qq(<span class="match">$title</span>);
2735                         }
2736                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2737                         $cloud->{$ctag}{ctag} =
2738                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2739                 }
2740         }
2741         return $cloud;
2742 }
2743
2744 sub git_show_project_tagcloud {
2745         my ($cloud, $count) = @_;
2746         if (ref $cloud eq 'HTML::TagCloud') {
2747                 return $cloud->html_and_css($count);
2748         } else {
2749                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2750                 return
2751                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2752                         join (', ', map {
2753                                 $cloud->{$_}->{'ctag'}
2754                         } splice(@tags, 0, $count)) .
2755                         '</div>';
2756         }
2757 }
2758
2759 sub git_get_project_url_list {
2760         my $path = shift;
2761
2762         $git_dir = "$projectroot/$path";
2763         open my $fd, '<', "$git_dir/cloneurl"
2764                 or return wantarray ?
2765                 @{ config_to_multi(git_get_project_config('url')) } :
2766                    config_to_multi(git_get_project_config('url'));
2767         my @git_project_url_list = map { chomp; $_ } <$fd>;
2768         close $fd;
2769
2770         return wantarray ? @git_project_url_list : \@git_project_url_list;
2771 }
2772
2773 sub git_get_projects_list {
2774         my $filter = shift || '';
2775         my @list;
2776
2777         $filter =~ s/\.git$//;
2778
2779         if (-d $projects_list) {
2780                 # search in directory
2781                 my $dir = $projects_list;
2782                 # remove the trailing "/"
2783                 $dir =~ s!/+$!!;
2784                 my $pfxlen = length("$projects_list");
2785                 my $pfxdepth = ($projects_list =~ tr!/!!);
2786                 # when filtering, search only given subdirectory
2787                 if ($filter) {
2788                         $dir .= "/$filter";
2789                         $dir =~ s!/+$!!;
2790                 }
2791
2792                 File::Find::find({
2793                         follow_fast => 1, # follow symbolic links
2794                         follow_skip => 2, # ignore duplicates
2795                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2796                         wanted => sub {
2797                                 # global variables
2798                                 our $project_maxdepth;
2799                                 our $projectroot;
2800                                 # skip project-list toplevel, if we get it.
2801                                 return if (m!^[/.]$!);
2802                                 # only directories can be git repositories
2803                                 return unless (-d $_);
2804                                 # don't traverse too deep (Find is super slow on os x)
2805                                 # $project_maxdepth excludes depth of $projectroot
2806                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2807                                         $File::Find::prune = 1;
2808                                         return;
2809                                 }
2810
2811                                 my $path = substr($File::Find::name, $pfxlen + 1);
2812                                 # we check related file in $projectroot
2813                                 if (check_export_ok("$projectroot/$path")) {
2814                                         push @list, { path => $path };
2815                                         $File::Find::prune = 1;
2816                                 }
2817                         },
2818                 }, "$dir");
2819
2820         } elsif (-f $projects_list) {
2821                 # read from file(url-encoded):
2822                 # 'git%2Fgit.git Linus+Torvalds'
2823                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2824                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2825                 open my $fd, '<', $projects_list or return;
2826         PROJECT:
2827                 while (my $line = <$fd>) {
2828                         chomp $line;
2829                         my ($path, $owner) = split ' ', $line;
2830                         $path = unescape($path);
2831                         $owner = unescape($owner);
2832                         if (!defined $path) {
2833                                 next;
2834                         }
2835                         # if $filter is rpovided, check if $path begins with $filter
2836                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2837                                 next;
2838                         }
2839                         if (check_export_ok("$projectroot/$path")) {
2840                                 my $pr = {
2841                                         path => $path,
2842                                         owner => to_utf8($owner),
2843                                 };
2844                                 push @list, $pr;
2845                         }
2846                 }
2847                 close $fd;
2848         }
2849         return @list;
2850 }
2851
2852 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2853 # as side effects it sets 'forks' field to list of forks for forked projects
2854 sub filter_forks_from_projects_list {
2855         my $projects = shift;
2856
2857         my %trie; # prefix tree of directories (path components)
2858         # generate trie out of those directories that might contain forks
2859         foreach my $pr (@$projects) {
2860                 my $path = $pr->{'path'};
2861                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2862                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2863                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2864                 next unless (-d $path);   # containing directory exists
2865                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2866
2867                 # add to trie
2868                 my @dirs = split('/', $path);
2869                 # walk the trie, until either runs out of components or out of trie
2870                 my $ref = \%trie;
2871                 while (scalar @dirs &&
2872                        exists($ref->{$dirs[0]})) {
2873                         $ref = $ref->{shift @dirs};
2874                 }
2875                 # create rest of trie structure from rest of components
2876                 foreach my $dir (@dirs) {
2877                         $ref = $ref->{$dir} = {};
2878                 }
2879                 # create end marker, store $pr as a data
2880                 $ref->{''} = $pr if (!exists $ref->{''});
2881         }
2882
2883         # filter out forks, by finding shortest prefix match for paths
2884         my @filtered;
2885  PROJECT:
2886         foreach my $pr (@$projects) {
2887                 # trie lookup
2888                 my $ref = \%trie;
2889         DIR:
2890                 foreach my $dir (split('/', $pr->{'path'})) {
2891                         if (exists $ref->{''}) {
2892                                 # found [shortest] prefix, is a fork - skip it
2893                                 push @{$ref->{''}{'forks'}}, $pr;
2894                                 next PROJECT;
2895                         }
2896                         if (!exists $ref->{$dir}) {
2897                                 # not in trie, cannot have prefix, not a fork
2898                                 push @filtered, $pr;
2899                                 next PROJECT;
2900                         }
2901                         # If the dir is there, we just walk one step down the trie.
2902                         $ref = $ref->{$dir};
2903                 }
2904                 # we ran out of trie
2905                 # (shouldn't happen: it's either no match, or end marker)
2906                 push @filtered, $pr;
2907         }
2908
2909         return @filtered;
2910 }
2911
2912 # note: fill_project_list_info must be run first,
2913 # for 'descr_long' and 'ctags' to be filled
2914 sub search_projects_list {
2915         my ($projlist, %opts) = @_;
2916         my $tagfilter  = $opts{'tagfilter'};
2917         my $searchtext = $opts{'searchtext'};
2918
2919         return @$projlist
2920                 unless ($tagfilter || $searchtext);
2921
2922         my @projects;
2923  PROJECT:
2924         foreach my $pr (@$projlist) {
2925
2926                 if ($tagfilter) {
2927                         next unless ref($pr->{'ctags'}) eq 'HASH';
2928                         next unless
2929                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2930                 }
2931
2932                 if ($searchtext) {
2933                         next unless
2934                                 $pr->{'path'} =~ /$searchtext/ ||
2935                                 $pr->{'descr_long'} =~ /$searchtext/;
2936                 }
2937
2938                 push @projects, $pr;
2939         }
2940
2941         return @projects;
2942 }
2943
2944 our $gitweb_project_owner = undef;
2945 sub git_get_project_list_from_file {
2946
2947         return if (defined $gitweb_project_owner);
2948
2949         $gitweb_project_owner = {};
2950         # read from file (url-encoded):
2951         # 'git%2Fgit.git Linus+Torvalds'
2952         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2953         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2954         if (-f $projects_list) {
2955                 open(my $fd, '<', $projects_list);
2956                 while (my $line = <$fd>) {
2957                         chomp $line;
2958                         my ($pr, $ow) = split ' ', $line;
2959                         $pr = unescape($pr);
2960                         $ow = unescape($ow);
2961                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2962                 }
2963                 close $fd;
2964         }
2965 }
2966
2967 sub git_get_project_owner {
2968         my $project = shift;
2969         my $owner;
2970
2971         return undef unless $project;
2972         $git_dir = "$projectroot/$project";
2973
2974         if (!defined $gitweb_project_owner) {
2975                 git_get_project_list_from_file();
2976         }
2977
2978         if (exists $gitweb_project_owner->{$project}) {
2979                 $owner = $gitweb_project_owner->{$project};
2980         }
2981         if (!defined $owner){
2982                 $owner = git_get_project_config('owner');
2983         }
2984         if (!defined $owner) {
2985                 $owner = get_file_owner("$git_dir");
2986         }
2987
2988         return $owner;
2989 }
2990
2991 sub git_get_last_activity {
2992         my ($path) = @_;
2993         my $fd;
2994
2995         $git_dir = "$projectroot/$path";
2996         open($fd, "-|", git_cmd(), 'for-each-ref',
2997              '--format=%(committer)',
2998              '--sort=-committerdate',
2999              '--count=1',
3000              'refs/heads') or return;
3001         my $most_recent = <$fd>;
3002         close $fd or return;
3003         if (defined $most_recent &&
3004             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3005                 my $timestamp = $1;
3006                 my $age = time - $timestamp;
3007                 return ($age, age_string($age));
3008         }
3009         return (undef, undef);
3010 }
3011
3012 # Implementation note: when a single remote is wanted, we cannot use 'git
3013 # remote show -n' because that command always work (assuming it's a remote URL
3014 # if it's not defined), and we cannot use 'git remote show' because that would
3015 # try to make a network roundtrip. So the only way to find if that particular
3016 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3017 # and when we find what we want.
3018 sub git_get_remotes_list {
3019         my $wanted = shift;
3020         my %remotes = ();
3021
3022         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3023         return unless $fd;
3024         while (my $remote = <$fd>) {
3025                 chomp $remote;
3026                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3027                 next if $wanted and not $remote eq $wanted;
3028                 my ($url, $key) = ($1, $2);
3029
3030                 $remotes{$remote} ||= { 'heads' => () };
3031                 $remotes{$remote}{$key} = $url;
3032         }
3033         close $fd or return;
3034         return wantarray ? %remotes : \%remotes;
3035 }
3036
3037 # Takes a hash of remotes as first parameter and fills it by adding the
3038 # available remote heads for each of the indicated remotes.
3039 sub fill_remote_heads {
3040         my $remotes = shift;
3041         my @heads = map { "remotes/$_" } keys %$remotes;
3042         my @remoteheads = git_get_heads_list(undef, @heads);
3043         foreach my $remote (keys %$remotes) {
3044                 $remotes->{$remote}{'heads'} = [ grep {
3045                         $_->{'name'} =~ s!^$remote/!!
3046                         } @remoteheads ];
3047         }
3048 }
3049
3050 sub git_get_references {
3051         my $type = shift || "";
3052         my %refs;
3053         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3054         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3055         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3056                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3057                 or return;
3058
3059         while (my $line = <$fd>) {
3060                 chomp $line;
3061                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3062                         if (defined $refs{$1}) {
3063                                 push @{$refs{$1}}, $2;
3064                         } else {
3065                                 $refs{$1} = [ $2 ];
3066                         }
3067                 }
3068         }
3069         close $fd or return;
3070         return \%refs;
3071 }
3072
3073 sub git_get_rev_name_tags {
3074         my $hash = shift || return undef;
3075
3076         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3077                 or return;
3078         my $name_rev = <$fd>;
3079         close $fd;
3080
3081         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3082                 return $1;
3083         } else {
3084                 # catches also '$hash undefined' output
3085                 return undef;
3086         }
3087 }
3088
3089 ## ----------------------------------------------------------------------
3090 ## parse to hash functions
3091
3092 sub parse_date {
3093         my $epoch = shift;
3094         my $tz = shift || "-0000";
3095
3096         my %date;
3097         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3098         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3099         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3100         $date{'hour'} = $hour;
3101         $date{'minute'} = $min;
3102         $date{'mday'} = $mday;
3103         $date{'day'} = $days[$wday];
3104         $date{'month'} = $months[$mon];
3105         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3106                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3107         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3108                              $mday, $months[$mon], $hour ,$min;
3109         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3110                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3111
3112         my ($tz_sign, $tz_hour, $tz_min) =
3113                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3114         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3115         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3116         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3117         $date{'hour_local'} = $hour;
3118         $date{'minute_local'} = $min;
3119         $date{'tz_local'} = $tz;
3120         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3121                                   1900+$year, $mon+1, $mday,
3122                                   $hour, $min, $sec, $tz);
3123         return %date;
3124 }
3125
3126 sub parse_tag {
3127         my $tag_id = shift;
3128         my %tag;
3129         my @comment;
3130
3131         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3132         $tag{'id'} = $tag_id;
3133         while (my $line = <$fd>) {
3134                 chomp $line;
3135                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3136                         $tag{'object'} = $1;
3137                 } elsif ($line =~ m/^type (.+)$/) {
3138                         $tag{'type'} = $1;
3139                 } elsif ($line =~ m/^tag (.+)$/) {
3140                         $tag{'name'} = $1;
3141                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3142                         $tag{'author'} = $1;
3143                         $tag{'author_epoch'} = $2;
3144                         $tag{'author_tz'} = $3;
3145                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3146                                 $tag{'author_name'}  = $1;
3147                                 $tag{'author_email'} = $2;
3148                         } else {
3149                                 $tag{'author_name'} = $tag{'author'};
3150                         }
3151                 } elsif ($line =~ m/--BEGIN/) {
3152                         push @comment, $line;
3153                         last;
3154                 } elsif ($line eq "") {
3155                         last;
3156                 }
3157         }
3158         push @comment, <$fd>;
3159         $tag{'comment'} = \@comment;
3160         close $fd or return;
3161         if (!defined $tag{'name'}) {
3162                 return
3163         };
3164         return %tag
3165 }
3166
3167 sub parse_commit_text {
3168         my ($commit_text, $withparents) = @_;
3169         my @commit_lines = split '\n', $commit_text;
3170         my %co;
3171
3172         pop @commit_lines; # Remove '\0'
3173
3174         if (! @commit_lines) {
3175                 return;
3176         }
3177
3178         my $header = shift @commit_lines;
3179         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3180                 return;
3181         }
3182         ($co{'id'}, my @parents) = split ' ', $header;
3183         while (my $line = shift @commit_lines) {
3184                 last if $line eq "\n";
3185                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3186                         $co{'tree'} = $1;
3187                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3188                         push @parents, $1;
3189                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3190                         $co{'author'} = to_utf8($1);
3191                         $co{'author_epoch'} = $2;
3192                         $co{'author_tz'} = $3;
3193                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3194                                 $co{'author_name'}  = $1;
3195                                 $co{'author_email'} = $2;
3196                         } else {
3197                                 $co{'author_name'} = $co{'author'};
3198                         }
3199                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3200                         $co{'committer'} = to_utf8($1);
3201                         $co{'committer_epoch'} = $2;
3202                         $co{'committer_tz'} = $3;
3203                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3204                                 $co{'committer_name'}  = $1;
3205                                 $co{'committer_email'} = $2;
3206                         } else {
3207                                 $co{'committer_name'} = $co{'committer'};
3208                         }
3209                 }
3210         }
3211         if (!defined $co{'tree'}) {
3212                 return;
3213         };
3214         $co{'parents'} = \@parents;
3215         $co{'parent'} = $parents[0];
3216
3217         foreach my $title (@commit_lines) {
3218                 $title =~ s/^    //;
3219                 if ($title ne "") {
3220                         $co{'title'} = chop_str($title, 80, 5);
3221                         # remove leading stuff of merges to make the interesting part visible
3222                         if (length($title) > 50) {
3223                                 $title =~ s/^Automatic //;
3224                                 $title =~ s/^merge (of|with) /Merge ... /i;
3225                                 if (length($title) > 50) {
3226                                         $title =~ s/(http|rsync):\/\///;
3227                                 }
3228                                 if (length($title) > 50) {
3229                                         $title =~ s/(master|www|rsync)\.//;
3230                                 }
3231                                 if (length($title) > 50) {
3232                                         $title =~ s/kernel.org:?//;
3233                                 }
3234                                 if (length($title) > 50) {
3235                                         $title =~ s/\/pub\/scm//;
3236                                 }
3237                         }
3238                         $co{'title_short'} = chop_str($title, 50, 5);
3239                         last;
3240                 }
3241         }
3242         if (! defined $co{'title'} || $co{'title'} eq "") {
3243                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3244         }
3245         # remove added spaces
3246         foreach my $line (@commit_lines) {
3247                 $line =~ s/^    //;
3248         }
3249         $co{'comment'} = \@commit_lines;
3250
3251         my $age = time - $co{'committer_epoch'};
3252         $co{'age'} = $age;
3253         $co{'age_string'} = age_string($age);
3254         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3255         if ($age > 60*60*24*7*2) {
3256                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3257                 $co{'age_string_age'} = $co{'age_string'};
3258         } else {
3259                 $co{'age_string_date'} = $co{'age_string'};
3260                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3261         }
3262         return %co;
3263 }
3264
3265 sub parse_commit {
3266         my ($commit_id) = @_;
3267         my %co;
3268
3269         local $/ = "\0";
3270
3271         open my $fd, "-|", git_cmd(), "rev-list",
3272                 "--parents",
3273                 "--header",
3274                 "--max-count=1",
3275                 $commit_id,
3276                 "--",
3277                 or die_error(500, "Open git-rev-list failed");
3278         %co = parse_commit_text(<$fd>, 1);
3279         close $fd;
3280
3281         return %co;
3282 }
3283
3284 sub parse_commits {
3285         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3286         my @cos;
3287
3288         $maxcount ||= 1;
3289         $skip ||= 0;
3290
3291         local $/ = "\0";
3292
3293         open my $fd, "-|", git_cmd(), "rev-list",
3294                 "--header",
3295                 @args,
3296                 ("--max-count=" . $maxcount),
3297                 ("--skip=" . $skip),
3298                 @extra_options,
3299                 $commit_id,
3300                 "--",
3301                 ($filename ? ($filename) : ())
3302                 or die_error(500, "Open git-rev-list failed");
3303         while (my $line = <$fd>) {
3304                 my %co = parse_commit_text($line);
3305                 push @cos, \%co;
3306         }
3307         close $fd;
3308
3309         return wantarray ? @cos : \@cos;
3310 }
3311
3312 # parse line of git-diff-tree "raw" output
3313 sub parse_difftree_raw_line {
3314         my $line = shift;
3315         my %res;
3316
3317         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3318         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3319         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3320                 $res{'from_mode'} = $1;
3321                 $res{'to_mode'} = $2;
3322                 $res{'from_id'} = $3;
3323                 $res{'to_id'} = $4;
3324                 $res{'status'} = $5;
3325                 $res{'similarity'} = $6;
3326                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3327                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3328                 } else {
3329                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3330                 }
3331         }
3332         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3333         # combined diff (for merge commit)
3334         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3335                 $res{'nparents'}  = length($1);
3336                 $res{'from_mode'} = [ split(' ', $2) ];
3337                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3338                 $res{'from_id'} = [ split(' ', $3) ];
3339                 $res{'to_id'} = pop @{$res{'from_id'}};
3340                 $res{'status'} = [ split('', $4) ];
3341                 $res{'to_file'} = unquote($5);
3342         }
3343         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3344         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3345                 $res{'commit'} = $1;
3346         }
3347
3348         return wantarray ? %res : \%res;
3349 }
3350
3351 # wrapper: return parsed line of git-diff-tree "raw" output
3352 # (the argument might be raw line, or parsed info)
3353 sub parsed_difftree_line {
3354         my $line_or_ref = shift;
3355
3356         if (ref($line_or_ref) eq "HASH") {
3357                 # pre-parsed (or generated by hand)
3358                 return $line_or_ref;
3359         } else {
3360                 return parse_difftree_raw_line($line_or_ref);
3361         }
3362 }
3363
3364 # parse line of git-ls-tree output
3365 sub parse_ls_tree_line {
3366         my $line = shift;
3367         my %opts = @_;
3368         my %res;
3369
3370         if ($opts{'-l'}) {
3371                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3372                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3373
3374                 $res{'mode'} = $1;
3375                 $res{'type'} = $2;
3376                 $res{'hash'} = $3;
3377                 $res{'size'} = $4;
3378                 if ($opts{'-z'}) {
3379                         $res{'name'} = $5;
3380                 } else {
3381                         $res{'name'} = unquote($5);
3382                 }
3383         } else {
3384                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3385                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3386
3387                 $res{'mode'} = $1;
3388                 $res{'type'} = $2;
3389                 $res{'hash'} = $3;
3390                 if ($opts{'-z'}) {
3391                         $res{'name'} = $4;
3392                 } else {
3393                         $res{'name'} = unquote($4);
3394                 }
3395         }
3396
3397         return wantarray ? %res : \%res;
3398 }
3399
3400 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3401 sub parse_from_to_diffinfo {
3402         my ($diffinfo, $from, $to, @parents) = @_;
3403
3404         if ($diffinfo->{'nparents'}) {
3405                 # combined diff
3406                 $from->{'file'} = [];
3407                 $from->{'href'} = [];
3408                 fill_from_file_info($diffinfo, @parents)
3409                         unless exists $diffinfo->{'from_file'};
3410                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3411                         $from->{'file'}[$i] =
3412                                 defined $diffinfo->{'from_file'}[$i] ?
3413                                         $diffinfo->{'from_file'}[$i] :
3414                                         $diffinfo->{'to_file'};
3415                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3416                                 $from->{'href'}[$i] = href(action=>"blob",
3417                                                            hash_base=>$parents[$i],
3418                                                            hash=>$diffinfo->{'from_id'}[$i],
3419                                                            file_name=>$from->{'file'}[$i]);
3420                         } else {
3421                                 $from->{'href'}[$i] = undef;
3422                         }
3423                 }
3424         } else {
3425                 # ordinary (not combined) diff
3426                 $from->{'file'} = $diffinfo->{'from_file'};
3427                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3428                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3429                                                hash=>$diffinfo->{'from_id'},
3430                                                file_name=>$from->{'file'});
3431                 } else {
3432                         delete $from->{'href'};
3433                 }
3434         }
3435
3436         $to->{'file'} = $diffinfo->{'to_file'};
3437         if (!is_deleted($diffinfo)) { # file exists in result
3438                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3439                                      hash=>$diffinfo->{'to_id'},
3440                                      file_name=>$to->{'file'});
3441         } else {
3442                 delete $to->{'href'};
3443         }
3444 }
3445
3446 ## ......................................................................
3447 ## parse to array of hashes functions
3448
3449 sub git_get_heads_list {
3450         my ($limit, @classes) = @_;
3451         @classes = ('heads') unless @classes;
3452         my @patterns = map { "refs/$_" } @classes;
3453         my @headslist;
3454
3455         open my $fd, '-|', git_cmd(), 'for-each-ref',
3456                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3457                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3458                 @patterns
3459                 or return;
3460         while (my $line = <$fd>) {
3461                 my %ref_item;
3462
3463                 chomp $line;
3464                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3465                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3466                 my ($committer, $epoch, $tz) =
3467                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3468                 $ref_item{'fullname'}  = $name;
3469                 $name =~ s!^refs/(?:head|remote)s/!!;
3470
3471                 $ref_item{'name'}  = $name;
3472                 $ref_item{'id'}    = $hash;
3473                 $ref_item{'title'} = $title || '(no commit message)';
3474                 $ref_item{'epoch'} = $epoch;
3475                 if ($epoch) {
3476                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3477                 } else {
3478                         $ref_item{'age'} = "unknown";
3479                 }
3480
3481                 push @headslist, \%ref_item;
3482         }
3483         close $fd;
3484
3485         return wantarray ? @headslist : \@headslist;
3486 }
3487
3488 sub git_get_tags_list {
3489         my $limit = shift;
3490         my @tagslist;
3491
3492         open my $fd, '-|', git_cmd(), 'for-each-ref',
3493                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3494                 '--format=%(objectname) %(objecttype) %(refname) '.
3495                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3496                 'refs/tags'
3497                 or return;
3498         while (my $line = <$fd>) {
3499                 my %ref_item;
3500
3501                 chomp $line;
3502                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3503                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3504                 my ($creator, $epoch, $tz) =
3505                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3506                 $ref_item{'fullname'} = $name;
3507                 $name =~ s!^refs/tags/!!;
3508
3509                 $ref_item{'type'} = $type;
3510                 $ref_item{'id'} = $id;
3511                 $ref_item{'name'} = $name;
3512                 if ($type eq "tag") {
3513                         $ref_item{'subject'} = $title;
3514                         $ref_item{'reftype'} = $reftype;
3515                         $ref_item{'refid'}   = $refid;
3516                 } else {
3517                         $ref_item{'reftype'} = $type;
3518                         $ref_item{'refid'}   = $id;
3519                 }
3520
3521                 if ($type eq "tag" || $type eq "commit") {
3522                         $ref_item{'epoch'} = $epoch;
3523                         if ($epoch) {
3524                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3525                         } else {
3526                                 $ref_item{'age'} = "unknown";
3527                         }
3528                 }
3529
3530                 push @tagslist, \%ref_item;
3531         }
3532         close $fd;
3533
3534         return wantarray ? @tagslist : \@tagslist;
3535 }
3536
3537 ## ----------------------------------------------------------------------
3538 ## filesystem-related functions
3539
3540 sub get_file_owner {
3541         my $path = shift;
3542
3543         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3544         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3545         if (!defined $gcos) {
3546                 return undef;
3547         }
3548         my $owner = $gcos;
3549         $owner =~ s/[,;].*$//;
3550         return to_utf8($owner);
3551 }
3552
3553 # assume that file exists
3554 sub insert_file {
3555         my $filename = shift;
3556
3557         open my $fd, '<', $filename;
3558         print map { to_utf8($_) } <$fd>;
3559         close $fd;
3560 }
3561
3562 ## ......................................................................
3563 ## mimetype related functions
3564
3565 sub mimetype_guess_file {
3566         my $filename = shift;
3567         my $mimemap = shift;
3568         -r $mimemap or return undef;
3569
3570         my %mimemap;
3571         open(my $mh, '<', $mimemap) or return undef;
3572         while (<$mh>) {
3573                 next if m/^#/; # skip comments
3574                 my ($mimetype, $exts) = split(/\t+/);
3575                 if (defined $exts) {
3576                         my @exts = split(/\s+/, $exts);
3577                         foreach my $ext (@exts) {
3578                                 $mimemap{$ext} = $mimetype;
3579                         }
3580                 }
3581         }
3582         close($mh);
3583
3584         $filename =~ /\.([^.]*)$/;
3585         return $mimemap{$1};
3586 }
3587
3588 sub mimetype_guess {
3589         my $filename = shift;
3590         my $mime;
3591         $filename =~ /\./ or return undef;
3592
3593         if ($mimetypes_file) {
3594                 my $file = $mimetypes_file;
3595                 if ($file !~ m!^/!) { # if it is relative path
3596                         # it is relative to project
3597                         $file = "$projectroot/$project/$file";
3598                 }
3599                 $mime = mimetype_guess_file($filename, $file);
3600         }
3601         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3602         return $mime;
3603 }
3604
3605 sub blob_mimetype {
3606         my $fd = shift;
3607         my $filename = shift;
3608
3609         if ($filename) {
3610                 my $mime = mimetype_guess($filename);
3611                 $mime and return $mime;
3612         }
3613
3614         # just in case
3615         return $default_blob_plain_mimetype unless $fd;
3616
3617         if (-T $fd) {
3618                 return 'text/plain';
3619         } elsif (! $filename) {
3620                 return 'application/octet-stream';
3621         } elsif ($filename =~ m/\.png$/i) {
3622                 return 'image/png';
3623         } elsif ($filename =~ m/\.gif$/i) {
3624                 return 'image/gif';
3625         } elsif ($filename =~ m/\.jpe?g$/i) {
3626                 return 'image/jpeg';
3627         } else {
3628                 return 'application/octet-stream';
3629         }
3630 }
3631
3632 sub blob_contenttype {
3633         my ($fd, $file_name, $type) = @_;
3634
3635         $type ||= blob_mimetype($fd, $file_name);
3636         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3637                 $type .= "; charset=$default_text_plain_charset";
3638         }
3639
3640         return $type;
3641 }
3642
3643 # guess file syntax for syntax highlighting; return undef if no highlighting
3644 # the name of syntax can (in the future) depend on syntax highlighter used
3645 sub guess_file_syntax {
3646         my ($highlight, $mimetype, $file_name) = @_;
3647         return undef unless ($highlight && defined $file_name);
3648         my $basename = basename($file_name, '.in');
3649         return $highlight_basename{$basename}
3650                 if exists $highlight_basename{$basename};
3651
3652         $basename =~ /\.([^.]*)$/;
3653         my $ext = $1 or return undef;
3654         return $highlight_ext{$ext}
3655                 if exists $highlight_ext{$ext};
3656
3657         return undef;
3658 }
3659
3660 # run highlighter and return FD of its output,
3661 # or return original FD if no highlighting
3662 sub run_highlighter {
3663         my ($fd, $highlight, $syntax) = @_;
3664         return $fd unless ($highlight && defined $syntax);
3665
3666         close $fd;
3667         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3668                   quote_command($highlight_bin).
3669                   " --replace-tabs=8 --fragment --syntax $syntax |"
3670                 or die_error(500, "Couldn't open file or run syntax highlighter");
3671         return $fd;
3672 }
3673
3674 ## ======================================================================
3675 ## functions printing HTML: header, footer, error page
3676
3677 sub get_page_title {
3678         my $title = to_utf8($site_name);
3679
3680         return $title unless (defined $project);
3681         $title .= " - " . to_utf8($project);
3682
3683         return $title unless (defined $action);
3684         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3685
3686         return $title unless (defined $file_name);
3687         $title .= " - " . esc_path($file_name);
3688         if ($action eq "tree" && $file_name !~ m|/$|) {
3689                 $title .= "/";
3690         }
3691
3692         return $title;
3693 }
3694
3695 sub print_feed_meta {
3696         if (defined $project) {
3697                 my %href_params = get_feed_info();
3698                 if (!exists $href_params{'-title'}) {
3699                         $href_params{'-title'} = 'log';
3700                 }
3701
3702                 foreach my $format (qw(RSS Atom)) {
3703                         my $type = lc($format);
3704                         my %link_attr = (
3705                                 '-rel' => 'alternate',
3706                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3707                                 '-type' => "application/$type+xml"
3708                         );
3709
3710                         $href_params{'action'} = $type;
3711                         $link_attr{'-href'} = href(%href_params);
3712                         print "<link ".
3713                               "rel=\"$link_attr{'-rel'}\" ".
3714                               "title=\"$link_attr{'-title'}\" ".
3715                               "href=\"$link_attr{'-href'}\" ".
3716                               "type=\"$link_attr{'-type'}\" ".
3717                               "/>\n";
3718
3719                         $href_params{'extra_options'} = '--no-merges';
3720                         $link_attr{'-href'} = href(%href_params);
3721                         $link_attr{'-title'} .= ' (no merges)';
3722                         print "<link ".
3723                               "rel=\"$link_attr{'-rel'}\" ".
3724                               "title=\"$link_attr{'-title'}\" ".
3725                               "href=\"$link_attr{'-href'}\" ".
3726                               "type=\"$link_attr{'-type'}\" ".
3727                               "/>\n";
3728                 }
3729
3730         } else {
3731                 printf('<link rel="alternate" title="%s projects list" '.
3732                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3733                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3734                 printf('<link rel="alternate" title="%s projects feeds" '.
3735                        'href="%s" type="text/x-opml" />'."\n",
3736                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3737         }
3738 }
3739
3740 sub git_header_html {
3741         my $status = shift || "200 OK";
3742         my $expires = shift;
3743         my %opts = @_;
3744
3745         my $title = get_page_title();
3746         my $content_type;
3747         # require explicit support from the UA if we are to send the page as
3748         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3749         # we have to do this because MSIE sometimes globs '*/*', pretending to
3750         # support xhtml+xml but choking when it gets what it asked for.
3751         if (defined $cgi->http('HTTP_ACCEPT') &&
3752             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3753             $cgi->Accept('application/xhtml+xml') != 0) {
3754                 $content_type = 'application/xhtml+xml';
3755         } else {
3756                 $content_type = 'text/html';
3757         }
3758         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3759                            -status=> $status, -expires => $expires)
3760                 unless ($opts{'-no_http_header'});
3761         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3762         print <<EOF;
3763 <?xml version="1.0" encoding="utf-8"?>
3764 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3765 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3766 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3767 <!-- git core binaries version $git_version -->
3768 <head>
3769 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3770 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3771 <meta name="robots" content="index, nofollow"/>
3772 <title>$title</title>
3773 EOF
3774         # the stylesheet, favicon etc urls won't work correctly with path_info
3775         # unless we set the appropriate base URL
3776         if ($ENV{'PATH_INFO'}) {
3777                 print "<base href=\"".esc_url($base_url)."\" />\n";
3778         }
3779         # print out each stylesheet that exist, providing backwards capability
3780         # for those people who defined $stylesheet in a config file
3781         if (defined $stylesheet) {
3782                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3783         } else {
3784                 foreach my $stylesheet (@stylesheets) {
3785                         next unless $stylesheet;
3786                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3787                 }
3788         }
3789         print_feed_meta()
3790                 if ($status eq '200 OK');
3791         if (defined $favicon) {
3792                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3793         }
3794
3795         print "</head>\n" .
3796               "<body>\n";
3797
3798         if (defined $site_header && -f $site_header) {
3799                 insert_file($site_header);
3800         }
3801
3802         print "<div class=\"page_header\">\n";
3803         if (defined $logo) {
3804                 print $cgi->a({-href => esc_url($logo_url),
3805                                -title => $logo_label},
3806                               $cgi->img({-src => esc_url($logo),
3807                                          -width => 72, -height => 27,
3808                                          -alt => "git",
3809                                          -class => "logo"}));
3810         }
3811         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3812         if (defined $project) {
3813                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3814                 if (defined $action) {
3815                         my $action_print = $action ;
3816                         if (defined $opts{-action_extra}) {
3817                                 $action_print = $cgi->a({-href => href(action=>$action)},
3818                                         $action);
3819                         }
3820                         print " / $action_print";
3821                 }
3822                 if (defined $opts{-action_extra}) {
3823                         print " / $opts{-action_extra}";
3824                 }
3825                 print "\n";
3826         }
3827         print "</div>\n";
3828
3829         my $have_search = gitweb_check_feature('search');
3830         if (defined $project && $have_search) {
3831                 if (!defined $searchtext) {
3832                         $searchtext = "";
3833                 }
3834                 my $search_hash;
3835                 if (defined $hash_base) {
3836                         $search_hash = $hash_base;
3837                 } elsif (defined $hash) {
3838                         $search_hash = $hash;
3839                 } else {
3840                         $search_hash = "HEAD";
3841                 }
3842                 my $action = $my_uri;
3843                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3844                 if ($use_pathinfo) {
3845                         $action .= "/".esc_url($project);
3846                 }
3847                 print $cgi->startform(-method => "get", -action => $action) .
3848                       "<div class=\"search\">\n" .
3849                       (!$use_pathinfo &&
3850                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3851                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3852                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3853                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3854                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3855                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3856                       " search:\n",
3857                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3858                       "<span title=\"Extended regular expression\">" .
3859                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3860                                      -checked => $search_use_regexp) .
3861                       "</span>" .
3862                       "</div>" .
3863                       $cgi->end_form() . "\n";
3864         }
3865 }
3866
3867 sub git_footer_html {
3868         my $feed_class = 'rss_logo';
3869
3870         print "<div class=\"page_footer\">\n";
3871         if (defined $project) {
3872                 my $descr = git_get_project_description($project);
3873                 if (defined $descr) {
3874                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3875                 }
3876
3877                 my %href_params = get_feed_info();
3878                 if (!%href_params) {
3879                         $feed_class .= ' generic';
3880                 }
3881                 $href_params{'-title'} ||= 'log';
3882
3883                 foreach my $format (qw(RSS Atom)) {
3884                         $href_params{'action'} = lc($format);
3885                         print $cgi->a({-href => href(%href_params),
3886                                       -title => "$href_params{'-title'} $format feed",
3887                                       -class => $feed_class}, $format)."\n";
3888                 }
3889
3890         } else {
3891                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3892                               -class => $feed_class}, "OPML") . " ";
3893                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3894                               -class => $feed_class}, "TXT") . "\n";
3895         }
3896         print "</div>\n"; # class="page_footer"
3897
3898         if (defined $t0 && gitweb_check_feature('timed')) {
3899                 print "<div id=\"generating_info\">\n";
3900                 print 'This page took '.
3901                       '<span id="generating_time" class="time_span">'.
3902                       tv_interval($t0, [ gettimeofday() ]).
3903                       ' seconds </span>'.
3904                       ' and '.
3905                       '<span id="generating_cmd">'.
3906                       $number_of_git_cmds.
3907                       '</span> git commands '.
3908                       " to generate.\n";
3909                 print "</div>\n"; # class="page_footer"
3910         }
3911
3912         if (defined $site_footer && -f $site_footer) {
3913                 insert_file($site_footer);
3914         }
3915
3916         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3917         if (defined $action &&
3918             $action eq 'blame_incremental') {
3919                 print qq!<script type="text/javascript">\n!.
3920                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3921                       qq!           "!. href() .qq!");\n!.
3922                       qq!</script>\n!;
3923         } else {
3924                 my ($jstimezone, $tz_cookie, $datetime_class) =
3925                         gitweb_get_feature('javascript-timezone');
3926
3927                 print qq!<script type="text/javascript">\n!.
3928                       qq!window.onload = function () {\n!;
3929                 if (gitweb_check_feature('javascript-actions')) {
3930                         print qq!       fixLinks();\n!;
3931                 }
3932                 if ($jstimezone && $tz_cookie && $datetime_class) {
3933                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
3934                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
3935                 }
3936                 print qq!};\n!.
3937                       qq!</script>\n!;
3938         }
3939
3940         print "</body>\n" .
3941               "</html>";
3942 }
3943
3944 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3945 # Example: die_error(404, 'Hash not found')
3946 # By convention, use the following status codes (as defined in RFC 2616):
3947 # 400: Invalid or missing CGI parameters, or
3948 #      requested object exists but has wrong type.
3949 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3950 #      this server or project.
3951 # 404: Requested object/revision/project doesn't exist.
3952 # 500: The server isn't configured properly, or
3953 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3954 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3955 # 503: The server is currently unavailable (because it is overloaded,
3956 #      or down for maintenance).  Generally, this is a temporary state.
3957 sub die_error {
3958         my $status = shift || 500;
3959         my $error = esc_html(shift) || "Internal Server Error";
3960         my $extra = shift;
3961         my %opts = @_;
3962
3963         my %http_responses = (
3964                 400 => '400 Bad Request',
3965                 403 => '403 Forbidden',
3966                 404 => '404 Not Found',
3967                 500 => '500 Internal Server Error',
3968                 503 => '503 Service Unavailable',
3969         );
3970         git_header_html($http_responses{$status}, undef, %opts);
3971         print <<EOF;
3972 <div class="page_body">
3973 <br /><br />
3974 $status - $error
3975 <br />
3976 EOF
3977         if (defined $extra) {
3978                 print "<hr />\n" .
3979                       "$extra\n";
3980         }
3981         print "</div>\n";
3982
3983         git_footer_html();
3984         goto DONE_GITWEB
3985                 unless ($opts{'-error_handler'});
3986 }
3987
3988 ## ----------------------------------------------------------------------
3989 ## functions printing or outputting HTML: navigation
3990
3991 sub git_print_page_nav {
3992         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3993         $extra = '' if !defined $extra; # pager or formats
3994
3995         my @navs = qw(summary shortlog log commit commitdiff tree);
3996         if ($suppress) {
3997                 @navs = grep { $_ ne $suppress } @navs;
3998         }
3999
4000         my %arg = map { $_ => {action=>$_} } @navs;
4001         if (defined $head) {
4002                 for (qw(commit commitdiff)) {
4003                         $arg{$_}{'hash'} = $head;
4004                 }
4005                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4006                         for (qw(shortlog log)) {
4007                                 $arg{$_}{'hash'} = $head;
4008                         }
4009                 }
4010         }
4011
4012         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4013         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4014
4015         my @actions = gitweb_get_feature('actions');
4016         my %repl = (
4017                 '%' => '%',
4018                 'n' => $project,         # project name
4019                 'f' => $git_dir,         # project path within filesystem
4020                 'h' => $treehead || '',  # current hash ('h' parameter)
4021                 'b' => $treebase || '',  # hash base ('hb' parameter)
4022         );
4023         while (@actions) {
4024                 my ($label, $link, $pos) = splice(@actions,0,3);
4025                 # insert
4026                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4027                 # munch munch
4028                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4029                 $arg{$label}{'_href'} = $link;
4030         }
4031
4032         print "<div class=\"page_nav\">\n" .
4033                 (join " | ",
4034                  map { $_ eq $current ?
4035                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4036                  } @navs);
4037         print "<br/>\n$extra<br/>\n" .
4038               "</div>\n";
4039 }
4040
4041 # returns a submenu for the nagivation of the refs views (tags, heads,
4042 # remotes) with the current view disabled and the remotes view only
4043 # available if the feature is enabled
4044 sub format_ref_views {
4045         my ($current) = @_;
4046         my @ref_views = qw{tags heads};
4047         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4048         return join " | ", map {
4049                 $_ eq $current ? $_ :
4050                 $cgi->a({-href => href(action=>$_)}, $_)
4051         } @ref_views
4052 }
4053
4054 sub format_paging_nav {
4055         my ($action, $page, $has_next_link) = @_;
4056         my $paging_nav;
4057
4058
4059         if ($page > 0) {
4060                 $paging_nav .=
4061                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4062                         " &sdot; " .
4063                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4064                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4065         } else {
4066                 $paging_nav .= "first &sdot; prev";
4067         }
4068
4069         if ($has_next_link) {
4070                 $paging_nav .= " &sdot; " .
4071                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4072                                  -accesskey => "n", -title => "Alt-n"}, "next");
4073         } else {
4074                 $paging_nav .= " &sdot; next";
4075         }
4076
4077         return $paging_nav;
4078 }
4079
4080 ## ......................................................................
4081 ## functions printing or outputting HTML: div
4082
4083 sub git_print_header_div {
4084         my ($action, $title, $hash, $hash_base) = @_;
4085         my %args = ();
4086
4087         $args{'action'} = $action;
4088         $args{'hash'} = $hash if $hash;
4089         $args{'hash_base'} = $hash_base if $hash_base;
4090
4091         print "<div class=\"header\">\n" .
4092               $cgi->a({-href => href(%args), -class => "title"},
4093               $title ? $title : $action) .
4094               "\n</div>\n";
4095 }
4096
4097 sub format_repo_url {
4098         my ($name, $url) = @_;
4099         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4100 }
4101
4102 # Group output by placing it in a DIV element and adding a header.
4103 # Options for start_div() can be provided by passing a hash reference as the
4104 # first parameter to the function.
4105 # Options to git_print_header_div() can be provided by passing an array
4106 # reference. This must follow the options to start_div if they are present.
4107 # The content can be a scalar, which is output as-is, a scalar reference, which
4108 # is output after html escaping, an IO handle passed either as *handle or
4109 # *handle{IO}, or a function reference. In the latter case all following
4110 # parameters will be taken as argument to the content function call.
4111 sub git_print_section {
4112         my ($div_args, $header_args, $content);
4113         my $arg = shift;
4114         if (ref($arg) eq 'HASH') {
4115                 $div_args = $arg;
4116                 $arg = shift;
4117         }
4118         if (ref($arg) eq 'ARRAY') {
4119                 $header_args = $arg;
4120                 $arg = shift;
4121         }
4122         $content = $arg;
4123
4124         print $cgi->start_div($div_args);
4125         git_print_header_div(@$header_args);
4126
4127         if (ref($content) eq 'CODE') {
4128                 $content->(@_);
4129         } elsif (ref($content) eq 'SCALAR') {
4130                 print esc_html($$content);
4131         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4132                 print <$content>;
4133         } elsif (!ref($content) && defined($content)) {
4134                 print $content;
4135         }
4136
4137         print $cgi->end_div;
4138 }
4139
4140 sub format_timestamp_html {
4141         my $date = shift;
4142         my $strtime = $date->{'rfc2822'};
4143
4144         my (undef, undef, $datetime_class) =
4145                 gitweb_get_feature('javascript-timezone');
4146         if ($datetime_class) {
4147                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4148         }
4149
4150         my $localtime_format = '(%02d:%02d %s)';
4151         if ($date->{'hour_local'} < 6) {
4152                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4153         }
4154         $strtime .= ' ' .
4155                     sprintf($localtime_format,
4156                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4157
4158         return $strtime;
4159 }
4160
4161 # Outputs the author name and date in long form
4162 sub git_print_authorship {
4163         my $co = shift;
4164         my %opts = @_;
4165         my $tag = $opts{-tag} || 'div';
4166         my $author = $co->{'author_name'};
4167
4168         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4169         print "<$tag class=\"author_date\">" .
4170               format_search_author($author, "author", esc_html($author)) .
4171               " [".format_timestamp_html(\%ad)."]".
4172               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4173               "</$tag>\n";
4174 }
4175
4176 # Outputs table rows containing the full author or committer information,
4177 # in the format expected for 'commit' view (& similar).
4178 # Parameters are a commit hash reference, followed by the list of people
4179 # to output information for. If the list is empty it defaults to both
4180 # author and committer.
4181 sub git_print_authorship_rows {
4182         my $co = shift;
4183         # too bad we can't use @people = @_ || ('author', 'committer')
4184         my @people = @_;
4185         @people = ('author', 'committer') unless @people;
4186         foreach my $who (@people) {
4187                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4188                 print "<tr><td>$who</td><td>" .
4189                       format_search_author($co->{"${who}_name"}, $who,
4190                                            esc_html($co->{"${who}_name"})) . " " .
4191                       format_search_author($co->{"${who}_email"}, $who,
4192                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4193                       "</td><td rowspan=\"2\">" .
4194                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4195                       "</td></tr>\n" .
4196                       "<tr>" .
4197                       "<td></td><td>" .
4198                       format_timestamp_html(\%wd) .
4199                       "</td>" .
4200                       "</tr>\n";
4201         }
4202 }
4203
4204 sub git_print_page_path {
4205         my $name = shift;
4206         my $type = shift;
4207         my $hb = shift;
4208
4209
4210         print "<div class=\"page_path\">";
4211         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4212                       -title => 'tree root'}, to_utf8("[$project]"));
4213         print " / ";
4214         if (defined $name) {
4215                 my @dirname = split '/', $name;
4216                 my $basename = pop @dirname;
4217                 my $fullname = '';
4218
4219                 foreach my $dir (@dirname) {
4220                         $fullname .= ($fullname ? '/' : '') . $dir;
4221                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4222                                                      hash_base=>$hb),
4223                                       -title => $fullname}, esc_path($dir));
4224                         print " / ";
4225                 }
4226                 if (defined $type && $type eq 'blob') {
4227                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4228                                                      hash_base=>$hb),
4229                                       -title => $name}, esc_path($basename));
4230                 } elsif (defined $type && $type eq 'tree') {
4231                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4232                                                      hash_base=>$hb),
4233                                       -title => $name}, esc_path($basename));
4234                         print " / ";
4235                 } else {
4236                         print esc_path($basename);
4237                 }
4238         }
4239         print "<br/></div>\n";
4240 }
4241
4242 sub git_print_log {
4243         my $log = shift;
4244         my %opts = @_;
4245
4246         if ($opts{'-remove_title'}) {
4247                 # remove title, i.e. first line of log
4248                 shift @$log;
4249         }
4250         # remove leading empty lines
4251         while (defined $log->[0] && $log->[0] eq "") {
4252                 shift @$log;
4253         }
4254
4255         # print log
4256         my $signoff = 0;
4257         my $empty = 0;
4258         foreach my $line (@$log) {
4259                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4260                         $signoff = 1;
4261                         $empty = 0;
4262                         if (! $opts{'-remove_signoff'}) {
4263                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4264                                 next;
4265                         } else {
4266                                 # remove signoff lines
4267                                 next;
4268                         }
4269                 } else {
4270                         $signoff = 0;
4271                 }
4272
4273                 # print only one empty line
4274                 # do not print empty line after signoff
4275                 if ($line eq "") {
4276                         next if ($empty || $signoff);
4277                         $empty = 1;
4278                 } else {
4279                         $empty = 0;
4280                 }
4281
4282                 print format_log_line_html($line) . "<br/>\n";
4283         }
4284
4285         if ($opts{'-final_empty_line'}) {
4286                 # end with single empty line
4287                 print "<br/>\n" unless $empty;
4288         }
4289 }
4290
4291 # return link target (what link points to)
4292 sub git_get_link_target {
4293         my $hash = shift;
4294         my $link_target;
4295
4296         # read link
4297         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4298                 or return;
4299         {
4300                 local $/ = undef;
4301                 $link_target = <$fd>;
4302         }
4303         close $fd
4304                 or return;
4305
4306         return $link_target;
4307 }
4308
4309 # given link target, and the directory (basedir) the link is in,
4310 # return target of link relative to top directory (top tree);
4311 # return undef if it is not possible (including absolute links).
4312 sub normalize_link_target {
4313         my ($link_target, $basedir) = @_;
4314
4315         # absolute symlinks (beginning with '/') cannot be normalized
4316         return if (substr($link_target, 0, 1) eq '/');
4317
4318         # normalize link target to path from top (root) tree (dir)
4319         my $path;
4320         if ($basedir) {
4321                 $path = $basedir . '/' . $link_target;
4322         } else {
4323                 # we are in top (root) tree (dir)
4324                 $path = $link_target;
4325         }
4326
4327         # remove //, /./, and /../
4328         my @path_parts;
4329         foreach my $part (split('/', $path)) {
4330                 # discard '.' and ''
4331                 next if (!$part || $part eq '.');
4332                 # handle '..'
4333                 if ($part eq '..') {
4334                         if (@path_parts) {
4335                                 pop @path_parts;
4336                         } else {
4337                                 # link leads outside repository (outside top dir)
4338                                 return;
4339                         }
4340                 } else {
4341                         push @path_parts, $part;
4342                 }
4343         }
4344         $path = join('/', @path_parts);
4345
4346         return $path;
4347 }
4348
4349 # print tree entry (row of git_tree), but without encompassing <tr> element
4350 sub git_print_tree_entry {
4351         my ($t, $basedir, $hash_base, $have_blame) = @_;
4352
4353         my %base_key = ();
4354         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4355
4356         # The format of a table row is: mode list link.  Where mode is
4357         # the mode of the entry, list is the name of the entry, an href,
4358         # and link is the action links of the entry.
4359
4360         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4361         if (exists $t->{'size'}) {
4362                 print "<td class=\"size\">$t->{'size'}</td>\n";
4363         }
4364         if ($t->{'type'} eq "blob") {
4365                 print "<td class=\"list\">" .
4366                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4367                                                file_name=>"$basedir$t->{'name'}", %base_key),
4368                                 -class => "list"}, esc_path($t->{'name'}));
4369                 if (S_ISLNK(oct $t->{'mode'})) {
4370                         my $link_target = git_get_link_target($t->{'hash'});
4371                         if ($link_target) {
4372                                 my $norm_target = normalize_link_target($link_target, $basedir);
4373                                 if (defined $norm_target) {
4374                                         print " -> " .
4375                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4376                                                                      file_name=>$norm_target),
4377                                                        -title => $norm_target}, esc_path($link_target));
4378                                 } else {
4379                                         print " -> " . esc_path($link_target);
4380                                 }
4381                         }
4382                 }
4383                 print "</td>\n";
4384                 print "<td class=\"link\">";
4385                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4386                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4387                               "blob");
4388                 if ($have_blame) {
4389                         print " | " .
4390                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4391                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4392                                       "blame");
4393                 }
4394                 if (defined $hash_base) {
4395                         print " | " .
4396                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4397                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4398                                       "history");
4399                 }
4400                 print " | " .
4401                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4402                                                file_name=>"$basedir$t->{'name'}")},
4403                                 "raw");
4404                 print "</td>\n";
4405
4406         } elsif ($t->{'type'} eq "tree") {
4407                 print "<td class=\"list\">";
4408                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4409                                              file_name=>"$basedir$t->{'name'}",
4410                                              %base_key)},
4411                               esc_path($t->{'name'}));
4412                 print "</td>\n";
4413                 print "<td class=\"link\">";
4414                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4415                                              file_name=>"$basedir$t->{'name'}",
4416                                              %base_key)},
4417                               "tree");
4418                 if (defined $hash_base) {
4419                         print " | " .
4420                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4421                                                      file_name=>"$basedir$t->{'name'}")},
4422                                       "history");
4423                 }
4424                 print "</td>\n";
4425         } else {
4426                 # unknown object: we can only present history for it
4427                 # (this includes 'commit' object, i.e. submodule support)
4428                 print "<td class=\"list\">" .
4429                       esc_path($t->{'name'}) .
4430                       "</td>\n";
4431                 print "<td class=\"link\">";
4432                 if (defined $hash_base) {
4433                         print $cgi->a({-href => href(action=>"history",
4434                                                      hash_base=>$hash_base,
4435                                                      file_name=>"$basedir$t->{'name'}")},
4436                                       "history");
4437                 }
4438                 print "</td>\n";
4439         }
4440 }
4441
4442 ## ......................................................................
4443 ## functions printing large fragments of HTML
4444
4445 # get pre-image filenames for merge (combined) diff
4446 sub fill_from_file_info {
4447         my ($diff, @parents) = @_;
4448
4449         $diff->{'from_file'} = [ ];
4450         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4451         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4452                 if ($diff->{'status'}[$i] eq 'R' ||
4453                     $diff->{'status'}[$i] eq 'C') {
4454                         $diff->{'from_file'}[$i] =
4455                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4456                 }
4457         }
4458
4459         return $diff;
4460 }
4461
4462 # is current raw difftree line of file deletion
4463 sub is_deleted {
4464         my $diffinfo = shift;
4465
4466         return $diffinfo->{'to_id'} eq ('0' x 40);
4467 }
4468
4469 # does patch correspond to [previous] difftree raw line
4470 # $diffinfo  - hashref of parsed raw diff format
4471 # $patchinfo - hashref of parsed patch diff format
4472 #              (the same keys as in $diffinfo)
4473 sub is_patch_split {
4474         my ($diffinfo, $patchinfo) = @_;
4475
4476         return defined $diffinfo && defined $patchinfo
4477                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4478 }
4479
4480
4481 sub git_difftree_body {
4482         my ($difftree, $hash, @parents) = @_;
4483         my ($parent) = $parents[0];
4484         my $have_blame = gitweb_check_feature('blame');
4485         print "<div class=\"list_head\">\n";
4486         if ($#{$difftree} > 10) {
4487                 print(($#{$difftree} + 1) . " files changed:\n");
4488         }
4489         print "</div>\n";
4490
4491         print "<table class=\"" .
4492               (@parents > 1 ? "combined " : "") .
4493               "diff_tree\">\n";
4494
4495         # header only for combined diff in 'commitdiff' view
4496         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4497         if ($has_header) {
4498                 # table header
4499                 print "<thead><tr>\n" .
4500                        "<th></th><th></th>\n"; # filename, patchN link
4501                 for (my $i = 0; $i < @parents; $i++) {
4502                         my $par = $parents[$i];
4503                         print "<th>" .
4504                               $cgi->a({-href => href(action=>"commitdiff",
4505                                                      hash=>$hash, hash_parent=>$par),
4506                                        -title => 'commitdiff to parent number ' .
4507                                                   ($i+1) . ': ' . substr($par,0,7)},
4508                                       $i+1) .
4509                               "&nbsp;</th>\n";
4510                 }
4511                 print "</tr></thead>\n<tbody>\n";
4512         }
4513
4514         my $alternate = 1;
4515         my $patchno = 0;
4516         foreach my $line (@{$difftree}) {
4517                 my $diff = parsed_difftree_line($line);
4518
4519                 if ($alternate) {
4520                         print "<tr class=\"dark\">\n";
4521                 } else {
4522                         print "<tr class=\"light\">\n";
4523                 }
4524                 $alternate ^= 1;
4525
4526                 if (exists $diff->{'nparents'}) { # combined diff
4527
4528                         fill_from_file_info($diff, @parents)
4529                                 unless exists $diff->{'from_file'};
4530
4531                         if (!is_deleted($diff)) {
4532                                 # file exists in the result (child) commit
4533                                 print "<td>" .
4534                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4535                                                              file_name=>$diff->{'to_file'},
4536                                                              hash_base=>$hash),
4537                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4538                                       "</td>\n";
4539                         } else {
4540                                 print "<td>" .
4541                                       esc_path($diff->{'to_file'}) .
4542                                       "</td>\n";
4543                         }
4544
4545                         if ($action eq 'commitdiff') {
4546                                 # link to patch
4547                                 $patchno++;
4548                                 print "<td class=\"link\">" .
4549                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4550                                               "patch") .
4551                                       " | " .
4552                                       "</td>\n";
4553                         }
4554
4555                         my $has_history = 0;
4556                         my $not_deleted = 0;
4557                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4558                                 my $hash_parent = $parents[$i];
4559                                 my $from_hash = $diff->{'from_id'}[$i];
4560                                 my $from_path = $diff->{'from_file'}[$i];
4561                                 my $status = $diff->{'status'}[$i];
4562
4563                                 $has_history ||= ($status ne 'A');
4564                                 $not_deleted ||= ($status ne 'D');
4565
4566                                 if ($status eq 'A') {
4567                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4568                                 } elsif ($status eq 'D') {
4569                                         print "<td class=\"link\">" .
4570                                               $cgi->a({-href => href(action=>"blob",
4571                                                                      hash_base=>$hash,
4572                                                                      hash=>$from_hash,
4573                                                                      file_name=>$from_path)},
4574                                                       "blob" . ($i+1)) .
4575                                               " | </td>\n";
4576                                 } else {
4577                                         if ($diff->{'to_id'} eq $from_hash) {
4578                                                 print "<td class=\"link nochange\">";
4579                                         } else {
4580                                                 print "<td class=\"link\">";
4581                                         }
4582                                         print $cgi->a({-href => href(action=>"blobdiff",
4583                                                                      hash=>$diff->{'to_id'},
4584                                                                      hash_parent=>$from_hash,
4585                                                                      hash_base=>$hash,
4586                                                                      hash_parent_base=>$hash_parent,
4587                                                                      file_name=>$diff->{'to_file'},
4588                                                                      file_parent=>$from_path)},
4589                                                       "diff" . ($i+1)) .
4590                                               " | </td>\n";
4591                                 }
4592                         }
4593
4594                         print "<td class=\"link\">";
4595                         if ($not_deleted) {
4596                                 print $cgi->a({-href => href(action=>"blob",
4597                                                              hash=>$diff->{'to_id'},
4598                                                              file_name=>$diff->{'to_file'},
4599                                                              hash_base=>$hash)},
4600                                               "blob");
4601                                 print " | " if ($has_history);
4602                         }
4603                         if ($has_history) {
4604                                 print $cgi->a({-href => href(action=>"history",
4605                                                              file_name=>$diff->{'to_file'},
4606                                                              hash_base=>$hash)},
4607                                               "history");
4608                         }
4609                         print "</td>\n";
4610
4611                         print "</tr>\n";
4612                         next; # instead of 'else' clause, to avoid extra indent
4613                 }
4614                 # else ordinary diff
4615
4616                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4617                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4618                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4619                         $to_mode_oct = oct $diff->{'to_mode'};
4620                         if (S_ISREG($to_mode_oct)) { # only for regular file
4621                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4622                         }
4623                         $to_file_type = file_type($diff->{'to_mode'});
4624                 }
4625                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4626                         $from_mode_oct = oct $diff->{'from_mode'};
4627                         if (S_ISREG($from_mode_oct)) { # only for regular file
4628                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4629                         }
4630                         $from_file_type = file_type($diff->{'from_mode'});
4631                 }
4632
4633                 if ($diff->{'status'} eq "A") { # created
4634                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4635                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4636                         $mode_chng   .= "]</span>";
4637                         print "<td>";
4638                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4639                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4640                                       -class => "list"}, esc_path($diff->{'file'}));
4641                         print "</td>\n";
4642                         print "<td>$mode_chng</td>\n";
4643                         print "<td class=\"link\">";
4644                         if ($action eq 'commitdiff') {
4645                                 # link to patch
4646                                 $patchno++;
4647                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4648                                               "patch") .
4649                                       " | ";
4650                         }
4651                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4652                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4653                                       "blob");
4654                         print "</td>\n";
4655
4656                 } elsif ($diff->{'status'} eq "D") { # deleted
4657                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4658                         print "<td>";
4659                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4660                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4661                                        -class => "list"}, esc_path($diff->{'file'}));
4662                         print "</td>\n";
4663                         print "<td>$mode_chng</td>\n";
4664                         print "<td class=\"link\">";
4665                         if ($action eq 'commitdiff') {
4666                                 # link to patch
4667                                 $patchno++;
4668                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4669                                               "patch") .
4670                                       " | ";
4671                         }
4672                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4673                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4674                                       "blob") . " | ";
4675                         if ($have_blame) {
4676                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4677                                                              file_name=>$diff->{'file'})},
4678                                               "blame") . " | ";
4679                         }
4680                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4681                                                      file_name=>$diff->{'file'})},
4682                                       "history");
4683                         print "</td>\n";
4684
4685                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4686                         my $mode_chnge = "";
4687                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4688                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4689                                 if ($from_file_type ne $to_file_type) {
4690                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4691                                 }
4692                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4693                                         if ($from_mode_str && $to_mode_str) {
4694                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4695                                         } elsif ($to_mode_str) {
4696                                                 $mode_chnge .= " mode: $to_mode_str";
4697                                         }
4698                                 }
4699                                 $mode_chnge .= "]</span>\n";
4700                         }
4701                         print "<td>";
4702                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4703                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4704                                       -class => "list"}, esc_path($diff->{'file'}));
4705                         print "</td>\n";
4706                         print "<td>$mode_chnge</td>\n";
4707                         print "<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 onlu mode changed)
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->{'file'})},
4720                                               "diff") .
4721                                       " | ";
4722                         }
4723                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4724                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4725                                        "blob") . " | ";
4726                         if ($have_blame) {
4727                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4728                                                              file_name=>$diff->{'file'})},
4729                                               "blame") . " | ";
4730                         }
4731                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4732                                                      file_name=>$diff->{'file'})},
4733                                       "history");
4734                         print "</td>\n";
4735
4736                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4737                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4738                         my $nstatus = $status_name{$diff->{'status'}};
4739                         my $mode_chng = "";
4740                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4741                                 # mode also for directories, so we cannot use $to_mode_str
4742                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4743                         }
4744                         print "<td>" .
4745                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4746                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4747                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4748                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4749                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4750                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4751                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4752                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4753                               "<td class=\"link\">";
4754                         if ($action eq 'commitdiff') {
4755                                 # link to patch
4756                                 $patchno++;
4757                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4758                                               "patch") .
4759                                       " | ";
4760                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4761                                 # "commit" view and modified file (not only pure rename or copy)
4762                                 print $cgi->a({-href => href(action=>"blobdiff",
4763                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4764                                                              hash_base=>$hash, hash_parent_base=>$parent,
4765                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4766                                               "diff") .
4767                                       " | ";
4768                         }
4769                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4770                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4771                                       "blob") . " | ";
4772                         if ($have_blame) {
4773                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4774                                                              file_name=>$diff->{'to_file'})},
4775                                               "blame") . " | ";
4776                         }
4777                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4778                                                     file_name=>$diff->{'to_file'})},
4779                                       "history");
4780                         print "</td>\n";
4781
4782                 } # we should not encounter Unmerged (U) or Unknown (X) status
4783                 print "</tr>\n";
4784         }
4785         print "</tbody>" if $has_header;
4786         print "</table>\n";
4787 }
4788
4789 sub git_patchset_body {
4790         my ($fd, $difftree, $hash, @hash_parents) = @_;
4791         my ($hash_parent) = $hash_parents[0];
4792
4793         my $is_combined = (@hash_parents > 1);
4794         my $patch_idx = 0;
4795         my $patch_number = 0;
4796         my $patch_line;
4797         my $diffinfo;
4798         my $to_name;
4799         my (%from, %to);
4800
4801         print "<div class=\"patchset\">\n";
4802
4803         # skip to first patch
4804         while ($patch_line = <$fd>) {
4805                 chomp $patch_line;
4806
4807                 last if ($patch_line =~ m/^diff /);
4808         }
4809
4810  PATCH:
4811         while ($patch_line) {
4812
4813                 # parse "git diff" header line
4814                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4815                         # $1 is from_name, which we do not use
4816                         $to_name = unquote($2);
4817                         $to_name =~ s!^b/!!;
4818                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4819                         # $1 is 'cc' or 'combined', which we do not use
4820                         $to_name = unquote($2);
4821                 } else {
4822                         $to_name = undef;
4823                 }
4824
4825                 # check if current patch belong to current raw line
4826                 # and parse raw git-diff line if needed
4827                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4828                         # this is continuation of a split patch
4829                         print "<div class=\"patch cont\">\n";
4830                 } else {
4831                         # advance raw git-diff output if needed
4832                         $patch_idx++ if defined $diffinfo;
4833
4834                         # read and prepare patch information
4835                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4836
4837                         # compact combined diff output can have some patches skipped
4838                         # find which patch (using pathname of result) we are at now;
4839                         if ($is_combined) {
4840                                 while ($to_name ne $diffinfo->{'to_file'}) {
4841                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4842                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4843                                               "</div>\n";  # class="patch"
4844
4845                                         $patch_idx++;
4846                                         $patch_number++;
4847
4848                                         last if $patch_idx > $#$difftree;
4849                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4850                                 }
4851                         }
4852
4853                         # modifies %from, %to hashes
4854                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4855
4856                         # this is first patch for raw difftree line with $patch_idx index
4857                         # we index @$difftree array from 0, but number patches from 1
4858                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4859                 }
4860
4861                 # git diff header
4862                 #assert($patch_line =~ m/^diff /) if DEBUG;
4863                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4864                 $patch_number++;
4865                 # print "git diff" header
4866                 print format_git_diff_header_line($patch_line, $diffinfo,
4867                                                   \%from, \%to);
4868
4869                 # print extended diff header
4870                 print "<div class=\"diff extended_header\">\n";
4871         EXTENDED_HEADER:
4872                 while ($patch_line = <$fd>) {
4873                         chomp $patch_line;
4874
4875                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4876
4877                         print format_extended_diff_header_line($patch_line, $diffinfo,
4878                                                                \%from, \%to);
4879                 }
4880                 print "</div>\n"; # class="diff extended_header"
4881
4882                 # from-file/to-file diff header
4883                 if (! $patch_line) {
4884                         print "</div>\n"; # class="patch"
4885                         last PATCH;
4886                 }
4887                 next PATCH if ($patch_line =~ m/^diff /);
4888                 #assert($patch_line =~ m/^---/) if DEBUG;
4889
4890                 my $last_patch_line = $patch_line;
4891                 $patch_line = <$fd>;
4892                 chomp $patch_line;
4893                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4894
4895                 print format_diff_from_to_header($last_patch_line, $patch_line,
4896                                                  $diffinfo, \%from, \%to,
4897                                                  @hash_parents);
4898
4899                 # the patch itself
4900         LINE:
4901                 while ($patch_line = <$fd>) {
4902                         chomp $patch_line;
4903
4904                         next PATCH if ($patch_line =~ m/^diff /);
4905
4906                         print format_diff_line($patch_line, \%from, \%to);
4907                 }
4908
4909         } continue {
4910                 print "</div>\n"; # class="patch"
4911         }
4912
4913         # for compact combined (--cc) format, with chunk and patch simplification
4914         # the patchset might be empty, but there might be unprocessed raw lines
4915         for (++$patch_idx if $patch_number > 0;
4916              $patch_idx < @$difftree;
4917              ++$patch_idx) {
4918                 # read and prepare patch information
4919                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4920
4921                 # generate anchor for "patch" links in difftree / whatchanged part
4922                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4923                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4924                       "</div>\n";  # class="patch"
4925
4926                 $patch_number++;
4927         }
4928
4929         if ($patch_number == 0) {
4930                 if (@hash_parents > 1) {
4931                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4932                 } else {
4933                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4934                 }
4935         }
4936
4937         print "</div>\n"; # class="patchset"
4938 }
4939
4940 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4941
4942 # fills project list info (age, description, owner, category, forks)
4943 # for each project in the list, removing invalid projects from
4944 # returned list
4945 # NOTE: modifies $projlist, but does not remove entries from it
4946 sub fill_project_list_info {
4947         my $projlist = shift;
4948         my @projects;
4949
4950         my $show_ctags = gitweb_check_feature('ctags');
4951  PROJECT:
4952         foreach my $pr (@$projlist) {
4953                 my (@activity) = git_get_last_activity($pr->{'path'});
4954                 unless (@activity) {
4955                         next PROJECT;
4956                 }
4957                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4958                 if (!defined $pr->{'descr'}) {
4959                         my $descr = git_get_project_description($pr->{'path'}) || "";
4960                         $descr = to_utf8($descr);
4961                         $pr->{'descr_long'} = $descr;
4962                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4963                 }
4964                 if (!defined $pr->{'owner'}) {
4965                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4966                 }
4967                 if ($show_ctags) {
4968                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4969                 }
4970                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4971                         my $cat = git_get_project_category($pr->{'path'}) ||
4972                                                            $project_list_default_category;
4973                         $pr->{'category'} = to_utf8($cat);
4974                 }
4975
4976                 push @projects, $pr;
4977         }
4978
4979         return @projects;
4980 }
4981
4982 sub sort_projects_list {
4983         my ($projlist, $order) = @_;
4984         my @projects;
4985
4986         my %order_info = (
4987                 project => { key => 'path', type => 'str' },
4988                 descr => { key => 'descr_long', type => 'str' },
4989                 owner => { key => 'owner', type => 'str' },
4990                 age => { key => 'age', type => 'num' }
4991         );
4992         my $oi = $order_info{$order};
4993         return @$projlist unless defined $oi;
4994         if ($oi->{'type'} eq 'str') {
4995                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4996         } else {
4997                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4998         }
4999
5000         return @projects;
5001 }
5002
5003 # returns a hash of categories, containing the list of project
5004 # belonging to each category
5005 sub build_projlist_by_category {
5006         my ($projlist, $from, $to) = @_;
5007         my %categories;
5008
5009         $from = 0 unless defined $from;
5010         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5011
5012         for (my $i = $from; $i <= $to; $i++) {
5013                 my $pr = $projlist->[$i];
5014                 push @{$categories{ $pr->{'category'} }}, $pr;
5015         }
5016
5017         return wantarray ? %categories : \%categories;
5018 }
5019
5020 # print 'sort by' <th> element, generating 'sort by $name' replay link
5021 # if that order is not selected
5022 sub print_sort_th {
5023         print format_sort_th(@_);
5024 }
5025
5026 sub format_sort_th {
5027         my ($name, $order, $header) = @_;
5028         my $sort_th = "";
5029         $header ||= ucfirst($name);
5030
5031         if ($order eq $name) {
5032                 $sort_th .= "<th>$header</th>\n";
5033         } else {
5034                 $sort_th .= "<th>" .
5035                             $cgi->a({-href => href(-replay=>1, order=>$name),
5036                                      -class => "header"}, $header) .
5037                             "</th>\n";
5038         }
5039
5040         return $sort_th;
5041 }
5042
5043 sub git_project_list_rows {
5044         my ($projlist, $from, $to, $check_forks) = @_;
5045
5046         $from = 0 unless defined $from;
5047         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5048
5049         my $alternate = 1;
5050         for (my $i = $from; $i <= $to; $i++) {
5051                 my $pr = $projlist->[$i];
5052
5053                 if ($alternate) {
5054                         print "<tr class=\"dark\">\n";
5055                 } else {
5056                         print "<tr class=\"light\">\n";
5057                 }
5058                 $alternate ^= 1;
5059
5060                 if ($check_forks) {
5061                         print "<td>";
5062                         if ($pr->{'forks'}) {
5063                                 my $nforks = scalar @{$pr->{'forks'}};
5064                                 if ($nforks > 0) {
5065                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5066                                                        -title => "$nforks forks"}, "+");
5067                                 } else {
5068                                         print $cgi->span({-title => "$nforks forks"}, "+");
5069                                 }
5070                         }
5071                         print "</td>\n";
5072                 }
5073                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5074                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5075                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5076                                         -class => "list", -title => $pr->{'descr_long'}},
5077                                         esc_html($pr->{'descr'})) . "</td>\n" .
5078                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5079                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5080                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5081                       "<td class=\"link\">" .
5082                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5083                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5084                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5085                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5086                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5087                       "</td>\n" .
5088                       "</tr>\n";
5089         }
5090 }
5091
5092 sub git_project_list_body {
5093         # actually uses global variable $project
5094         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5095         my @projects = @$projlist;
5096
5097         my $check_forks = gitweb_check_feature('forks');
5098         my $show_ctags  = gitweb_check_feature('ctags');
5099         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5100         $check_forks = undef
5101                 if ($tagfilter || $searchtext);
5102
5103         # filtering out forks before filling info allows to do less work
5104         @projects = filter_forks_from_projects_list(\@projects)
5105                 if ($check_forks);
5106         @projects = fill_project_list_info(\@projects);
5107         # searching projects require filling to be run before it
5108         @projects = search_projects_list(\@projects,
5109                                          'searchtext' => $searchtext,
5110                                          'tagfilter'  => $tagfilter)
5111                 if ($tagfilter || $searchtext);
5112
5113         $order ||= $default_projects_order;
5114         $from = 0 unless defined $from;
5115         $to = $#projects if (!defined $to || $#projects < $to);
5116
5117         # short circuit
5118         if ($from > $to) {
5119                 print "<center>\n".
5120                       "<b>No such projects found</b><br />\n".
5121                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5122                       "</center>\n<br />\n";
5123                 return;
5124         }
5125
5126         @projects = sort_projects_list(\@projects, $order);
5127
5128         if ($show_ctags) {
5129                 my $ctags = git_gather_all_ctags(\@projects);
5130                 my $cloud = git_populate_project_tagcloud($ctags);
5131                 print git_show_project_tagcloud($cloud, 64);
5132         }
5133
5134         print "<table class=\"project_list\">\n";
5135         unless ($no_header) {
5136                 print "<tr>\n";
5137                 if ($check_forks) {
5138                         print "<th></th>\n";
5139                 }
5140                 print_sort_th('project', $order, 'Project');
5141                 print_sort_th('descr', $order, 'Description');
5142                 print_sort_th('owner', $order, 'Owner');
5143                 print_sort_th('age', $order, 'Last Change');
5144                 print "<th></th>\n" . # for links
5145                       "</tr>\n";
5146         }
5147
5148         if ($projects_list_group_categories) {
5149                 # only display categories with projects in the $from-$to window
5150                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5151                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5152                 foreach my $cat (sort keys %categories) {
5153                         unless ($cat eq "") {
5154                                 print "<tr>\n";
5155                                 if ($check_forks) {
5156                                         print "<td></td>\n";
5157                                 }
5158                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5159                                 print "</tr>\n";
5160                         }
5161
5162                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5163                 }
5164         } else {
5165                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5166         }
5167
5168         if (defined $extra) {
5169                 print "<tr>\n";
5170                 if ($check_forks) {
5171                         print "<td></td>\n";
5172                 }
5173                 print "<td colspan=\"5\">$extra</td>\n" .
5174                       "</tr>\n";
5175         }
5176         print "</table>\n";
5177 }
5178
5179 sub git_log_body {
5180         # uses global variable $project
5181         my ($commitlist, $from, $to, $refs, $extra) = @_;
5182
5183         $from = 0 unless defined $from;
5184         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5185
5186         for (my $i = 0; $i <= $to; $i++) {
5187                 my %co = %{$commitlist->[$i]};
5188                 next if !%co;
5189                 my $commit = $co{'id'};
5190                 my $ref = format_ref_marker($refs, $commit);
5191                 git_print_header_div('commit',
5192                                "<span class=\"age\">$co{'age_string'}</span>" .
5193                                esc_html($co{'title'}) . $ref,
5194                                $commit);
5195                 print "<div class=\"title_text\">\n" .
5196                       "<div class=\"log_link\">\n" .
5197                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5198                       " | " .
5199                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5200                       " | " .
5201                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5202                       "<br/>\n" .
5203                       "</div>\n";
5204                       git_print_authorship(\%co, -tag => 'span');
5205                       print "<br/>\n</div>\n";
5206
5207                 print "<div class=\"log_body\">\n";
5208                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5209                 print "</div>\n";
5210         }
5211         if ($extra) {
5212                 print "<div class=\"page_nav\">\n";
5213                 print "$extra\n";
5214                 print "</div>\n";
5215         }
5216 }
5217
5218 sub git_shortlog_body {
5219         # uses global variable $project
5220         my ($commitlist, $from, $to, $refs, $extra) = @_;
5221
5222         $from = 0 unless defined $from;
5223         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5224
5225         print "<table class=\"shortlog\">\n";
5226         my $alternate = 1;
5227         for (my $i = $from; $i <= $to; $i++) {
5228                 my %co = %{$commitlist->[$i]};
5229                 my $commit = $co{'id'};
5230                 my $ref = format_ref_marker($refs, $commit);
5231                 if ($alternate) {
5232                         print "<tr class=\"dark\">\n";
5233                 } else {
5234                         print "<tr class=\"light\">\n";
5235                 }
5236                 $alternate ^= 1;
5237                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5238                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5239                       format_author_html('td', \%co, 10) . "<td>";
5240                 print format_subject_html($co{'title'}, $co{'title_short'},
5241                                           href(action=>"commit", hash=>$commit), $ref);
5242                 print "</td>\n" .
5243                       "<td class=\"link\">" .
5244                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5245                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5246                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5247                 my $snapshot_links = format_snapshot_links($commit);
5248                 if (defined $snapshot_links) {
5249                         print " | " . $snapshot_links;
5250                 }
5251                 print "</td>\n" .
5252                       "</tr>\n";
5253         }
5254         if (defined $extra) {
5255                 print "<tr>\n" .
5256                       "<td colspan=\"4\">$extra</td>\n" .
5257                       "</tr>\n";
5258         }
5259         print "</table>\n";
5260 }
5261
5262 sub git_history_body {
5263         # Warning: assumes constant type (blob or tree) during history
5264         my ($commitlist, $from, $to, $refs, $extra,
5265             $file_name, $file_hash, $ftype) = @_;
5266
5267         $from = 0 unless defined $from;
5268         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5269
5270         print "<table class=\"history\">\n";
5271         my $alternate = 1;
5272         for (my $i = $from; $i <= $to; $i++) {
5273                 my %co = %{$commitlist->[$i]};
5274                 if (!%co) {
5275                         next;
5276                 }
5277                 my $commit = $co{'id'};
5278
5279                 my $ref = format_ref_marker($refs, $commit);
5280
5281                 if ($alternate) {
5282                         print "<tr class=\"dark\">\n";
5283                 } else {
5284                         print "<tr class=\"light\">\n";
5285                 }
5286                 $alternate ^= 1;
5287                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5288         # shortlog:   format_author_html('td', \%co, 10)
5289                       format_author_html('td', \%co, 15, 3) . "<td>";
5290                 # originally git_history used chop_str($co{'title'}, 50)
5291                 print format_subject_html($co{'title'}, $co{'title_short'},
5292                                           href(action=>"commit", hash=>$commit), $ref);
5293                 print "</td>\n" .
5294                       "<td class=\"link\">" .
5295                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5296                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5297
5298                 if ($ftype eq 'blob') {
5299                         my $blob_current = $file_hash;
5300                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5301                         if (defined $blob_current && defined $blob_parent &&
5302                                         $blob_current ne $blob_parent) {
5303                                 print " | " .
5304                                         $cgi->a({-href => href(action=>"blobdiff",
5305                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5306                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5307                                                                file_name=>$file_name)},
5308                                                 "diff to current");
5309                         }
5310                 }
5311                 print "</td>\n" .
5312                       "</tr>\n";
5313         }
5314         if (defined $extra) {
5315                 print "<tr>\n" .
5316                       "<td colspan=\"4\">$extra</td>\n" .
5317                       "</tr>\n";
5318         }
5319         print "</table>\n";
5320 }
5321
5322 sub git_tags_body {
5323         # uses global variable $project
5324         my ($taglist, $from, $to, $extra) = @_;
5325         $from = 0 unless defined $from;
5326         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5327
5328         print "<table class=\"tags\">\n";
5329         my $alternate = 1;
5330         for (my $i = $from; $i <= $to; $i++) {
5331                 my $entry = $taglist->[$i];
5332                 my %tag = %$entry;
5333                 my $comment = $tag{'subject'};
5334                 my $comment_short;
5335                 if (defined $comment) {
5336                         $comment_short = chop_str($comment, 30, 5);
5337                 }
5338                 if ($alternate) {
5339                         print "<tr class=\"dark\">\n";
5340                 } else {
5341                         print "<tr class=\"light\">\n";
5342                 }
5343                 $alternate ^= 1;
5344                 if (defined $tag{'age'}) {
5345                         print "<td><i>$tag{'age'}</i></td>\n";
5346                 } else {
5347                         print "<td></td>\n";
5348                 }
5349                 print "<td>" .
5350                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5351                                -class => "list name"}, esc_html($tag{'name'})) .
5352                       "</td>\n" .
5353                       "<td>";
5354                 if (defined $comment) {
5355                         print format_subject_html($comment, $comment_short,
5356                                                   href(action=>"tag", hash=>$tag{'id'}));
5357                 }
5358                 print "</td>\n" .
5359                       "<td class=\"selflink\">";
5360                 if ($tag{'type'} eq "tag") {
5361                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5362                 } else {
5363                         print "&nbsp;";
5364                 }
5365                 print "</td>\n" .
5366                       "<td class=\"link\">" . " | " .
5367                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5368                 if ($tag{'reftype'} eq "commit") {
5369                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5370                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5371                 } elsif ($tag{'reftype'} eq "blob") {
5372                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5373                 }
5374                 print "</td>\n" .
5375                       "</tr>";
5376         }
5377         if (defined $extra) {
5378                 print "<tr>\n" .
5379                       "<td colspan=\"5\">$extra</td>\n" .
5380                       "</tr>\n";
5381         }
5382         print "</table>\n";
5383 }
5384
5385 sub git_heads_body {
5386         # uses global variable $project
5387         my ($headlist, $head, $from, $to, $extra) = @_;
5388         $from = 0 unless defined $from;
5389         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5390
5391         print "<table class=\"heads\">\n";
5392         my $alternate = 1;
5393         for (my $i = $from; $i <= $to; $i++) {
5394                 my $entry = $headlist->[$i];
5395                 my %ref = %$entry;
5396                 my $curr = $ref{'id'} eq $head;
5397                 if ($alternate) {
5398                         print "<tr class=\"dark\">\n";
5399                 } else {
5400                         print "<tr class=\"light\">\n";
5401                 }
5402                 $alternate ^= 1;
5403                 print "<td><i>$ref{'age'}</i></td>\n" .
5404                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5405                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5406                                -class => "list name"},esc_html($ref{'name'})) .
5407                       "</td>\n" .
5408                       "<td class=\"link\">" .
5409                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5410                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5411                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5412                       "</td>\n" .
5413                       "</tr>";
5414         }
5415         if (defined $extra) {
5416                 print "<tr>\n" .
5417                       "<td colspan=\"3\">$extra</td>\n" .
5418                       "</tr>\n";
5419         }
5420         print "</table>\n";
5421 }
5422
5423 # Display a single remote block
5424 sub git_remote_block {
5425         my ($remote, $rdata, $limit, $head) = @_;
5426
5427         my $heads = $rdata->{'heads'};
5428         my $fetch = $rdata->{'fetch'};
5429         my $push = $rdata->{'push'};
5430
5431         my $urls_table = "<table class=\"projects_list\">\n" ;
5432
5433         if (defined $fetch) {
5434                 if ($fetch eq $push) {
5435                         $urls_table .= format_repo_url("URL", $fetch);
5436                 } else {
5437                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5438                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5439                 }
5440         } elsif (defined $push) {
5441                 $urls_table .= format_repo_url("Push URL", $push);
5442         } else {
5443                 $urls_table .= format_repo_url("", "No remote URL");
5444         }
5445
5446         $urls_table .= "</table>\n";
5447
5448         my $dots;
5449         if (defined $limit && $limit < @$heads) {
5450                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5451         }
5452
5453         print $urls_table;
5454         git_heads_body($heads, $head, 0, $limit, $dots);
5455 }
5456
5457 # Display a list of remote names with the respective fetch and push URLs
5458 sub git_remotes_list {
5459         my ($remotedata, $limit) = @_;
5460         print "<table class=\"heads\">\n";
5461         my $alternate = 1;
5462         my @remotes = sort keys %$remotedata;
5463
5464         my $limited = $limit && $limit < @remotes;
5465
5466         $#remotes = $limit - 1 if $limited;
5467
5468         while (my $remote = shift @remotes) {
5469                 my $rdata = $remotedata->{$remote};
5470                 my $fetch = $rdata->{'fetch'};
5471                 my $push = $rdata->{'push'};
5472                 if ($alternate) {
5473                         print "<tr class=\"dark\">\n";
5474                 } else {
5475                         print "<tr class=\"light\">\n";
5476                 }
5477                 $alternate ^= 1;
5478                 print "<td>" .
5479                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5480                                -class=> "list name"},esc_html($remote)) .
5481                       "</td>";
5482                 print "<td class=\"link\">" .
5483                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5484                       " | " .
5485                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5486                       "</td>";
5487
5488                 print "</tr>\n";
5489         }
5490
5491         if ($limited) {
5492                 print "<tr>\n" .
5493                       "<td colspan=\"3\">" .
5494                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5495                       "</td>\n" . "</tr>\n";
5496         }
5497
5498         print "</table>";
5499 }
5500
5501 # Display remote heads grouped by remote, unless there are too many
5502 # remotes, in which case we only display the remote names
5503 sub git_remotes_body {
5504         my ($remotedata, $limit, $head) = @_;
5505         if ($limit and $limit < keys %$remotedata) {
5506                 git_remotes_list($remotedata, $limit);
5507         } else {
5508                 fill_remote_heads($remotedata);
5509                 while (my ($remote, $rdata) = each %$remotedata) {
5510                         git_print_section({-class=>"remote", -id=>$remote},
5511                                 ["remotes", $remote, $remote], sub {
5512                                         git_remote_block($remote, $rdata, $limit, $head);
5513                                 });
5514                 }
5515         }
5516 }
5517
5518 sub git_search_grep_body {
5519         my ($commitlist, $from, $to, $extra) = @_;
5520         $from = 0 unless defined $from;
5521         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5522
5523         print "<table class=\"commit_search\">\n";
5524         my $alternate = 1;
5525         for (my $i = $from; $i <= $to; $i++) {
5526                 my %co = %{$commitlist->[$i]};
5527                 if (!%co) {
5528                         next;
5529                 }
5530                 my $commit = $co{'id'};
5531                 if ($alternate) {
5532                         print "<tr class=\"dark\">\n";
5533                 } else {
5534                         print "<tr class=\"light\">\n";
5535                 }
5536                 $alternate ^= 1;
5537                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5538                       format_author_html('td', \%co, 15, 5) .
5539                       "<td>" .
5540                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5541                                -class => "list subject"},
5542                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5543                 my $comment = $co{'comment'};
5544                 foreach my $line (@$comment) {
5545                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5546                                 my ($lead, $match, $trail) = ($1, $2, $3);
5547                                 $match = chop_str($match, 70, 5, 'center');
5548                                 my $contextlen = int((80 - length($match))/2);
5549                                 $contextlen = 30 if ($contextlen > 30);
5550                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5551                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5552
5553                                 $lead  = esc_html($lead);
5554                                 $match = esc_html($match);
5555                                 $trail = esc_html($trail);
5556
5557                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5558                         }
5559                 }
5560                 print "</td>\n" .
5561                       "<td class=\"link\">" .
5562                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5563                       " | " .
5564                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5565                       " | " .
5566                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5567                 print "</td>\n" .
5568                       "</tr>\n";
5569         }
5570         if (defined $extra) {
5571                 print "<tr>\n" .
5572                       "<td colspan=\"3\">$extra</td>\n" .
5573                       "</tr>\n";
5574         }
5575         print "</table>\n";
5576 }
5577
5578 ## ======================================================================
5579 ## ======================================================================
5580 ## actions
5581
5582 sub git_project_list {
5583         my $order = $input_params{'order'};
5584         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5585                 die_error(400, "Unknown order parameter");
5586         }
5587
5588         my @list = git_get_projects_list();
5589         if (!@list) {
5590                 die_error(404, "No projects found");
5591         }
5592
5593         git_header_html();
5594         if (defined $home_text && -f $home_text) {
5595                 print "<div class=\"index_include\">\n";
5596                 insert_file($home_text);
5597                 print "</div>\n";
5598         }
5599         print $cgi->startform(-method => "get") .
5600               "<p class=\"projsearch\">Search:\n" .
5601               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5602               "</p>" .
5603               $cgi->end_form() . "\n";
5604         git_project_list_body(\@list, $order);
5605         git_footer_html();
5606 }
5607
5608 sub git_forks {
5609         my $order = $input_params{'order'};
5610         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5611                 die_error(400, "Unknown order parameter");
5612         }
5613
5614         my @list = git_get_projects_list($project);
5615         if (!@list) {
5616                 die_error(404, "No forks found");
5617         }
5618
5619         git_header_html();
5620         git_print_page_nav('','');
5621         git_print_header_div('summary', "$project forks");
5622         git_project_list_body(\@list, $order);
5623         git_footer_html();
5624 }
5625
5626 sub git_project_index {
5627         my @projects = git_get_projects_list();
5628         if (!@projects) {
5629                 die_error(404, "No projects found");
5630         }
5631
5632         print $cgi->header(
5633                 -type => 'text/plain',
5634                 -charset => 'utf-8',
5635                 -content_disposition => 'inline; filename="index.aux"');
5636
5637         foreach my $pr (@projects) {
5638                 if (!exists $pr->{'owner'}) {
5639                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5640                 }
5641
5642                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5643                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5644                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5645                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5646                 $path  =~ s/ /\+/g;
5647                 $owner =~ s/ /\+/g;
5648
5649                 print "$path $owner\n";
5650         }
5651 }
5652
5653 sub git_summary {
5654         my $descr = git_get_project_description($project) || "none";
5655         my %co = parse_commit("HEAD");
5656         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5657         my $head = $co{'id'};
5658         my $remote_heads = gitweb_check_feature('remote_heads');
5659
5660         my $owner = git_get_project_owner($project);
5661
5662         my $refs = git_get_references();
5663         # These get_*_list functions return one more to allow us to see if
5664         # there are more ...
5665         my @taglist  = git_get_tags_list(16);
5666         my @headlist = git_get_heads_list(16);
5667         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5668         my @forklist;
5669         my $check_forks = gitweb_check_feature('forks');
5670
5671         if ($check_forks) {
5672                 # find forks of a project
5673                 @forklist = git_get_projects_list($project);
5674                 # filter out forks of forks
5675                 @forklist = filter_forks_from_projects_list(\@forklist)
5676                         if (@forklist);
5677         }
5678
5679         git_header_html();
5680         git_print_page_nav('summary','', $head);
5681
5682         print "<div class=\"title\">&nbsp;</div>\n";
5683         print "<table class=\"projects_list\">\n" .
5684               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5685               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5686         if (defined $cd{'rfc2822'}) {
5687                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5688                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5689         }
5690
5691         # use per project git URL list in $projectroot/$project/cloneurl
5692         # or make project git URL from git base URL and project name
5693         my $url_tag = "URL";
5694         my @url_list = git_get_project_url_list($project);
5695         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5696         foreach my $git_url (@url_list) {
5697                 next unless $git_url;
5698                 print format_repo_url($url_tag, $git_url);
5699                 $url_tag = "";
5700         }
5701
5702         # Tag cloud
5703         my $show_ctags = gitweb_check_feature('ctags');
5704         if ($show_ctags) {
5705                 my $ctags = git_get_project_ctags($project);
5706                 if (%$ctags) {
5707                         # without ability to add tags, don't show if there are none
5708                         my $cloud = git_populate_project_tagcloud($ctags);
5709                         print "<tr id=\"metadata_ctags\">" .
5710                               "<td>content tags</td>" .
5711                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5712                               "</tr>\n";
5713                 }
5714         }
5715
5716         print "</table>\n";
5717
5718         # If XSS prevention is on, we don't include README.html.
5719         # TODO: Allow a readme in some safe format.
5720         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5721                 print "<div class=\"title\">readme</div>\n" .
5722                       "<div class=\"readme\">\n";
5723                 insert_file("$projectroot/$project/README.html");
5724                 print "\n</div>\n"; # class="readme"
5725         }
5726
5727         # we need to request one more than 16 (0..15) to check if
5728         # those 16 are all
5729         my @commitlist = $head ? parse_commits($head, 17) : ();
5730         if (@commitlist) {
5731                 git_print_header_div('shortlog');
5732                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5733                                   $#commitlist <=  15 ? undef :
5734                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5735         }
5736
5737         if (@taglist) {
5738                 git_print_header_div('tags');
5739                 git_tags_body(\@taglist, 0, 15,
5740                               $#taglist <=  15 ? undef :
5741                               $cgi->a({-href => href(action=>"tags")}, "..."));
5742         }
5743
5744         if (@headlist) {
5745                 git_print_header_div('heads');
5746                 git_heads_body(\@headlist, $head, 0, 15,
5747                                $#headlist <= 15 ? undef :
5748                                $cgi->a({-href => href(action=>"heads")}, "..."));
5749         }
5750
5751         if (%remotedata) {
5752                 git_print_header_div('remotes');
5753                 git_remotes_body(\%remotedata, 15, $head);
5754         }
5755
5756         if (@forklist) {
5757                 git_print_header_div('forks');
5758                 git_project_list_body(\@forklist, 'age', 0, 15,
5759                                       $#forklist <= 15 ? undef :
5760                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5761                                       'no_header');
5762         }
5763
5764         git_footer_html();
5765 }
5766
5767 sub git_tag {
5768         my %tag = parse_tag($hash);
5769
5770         if (! %tag) {
5771                 die_error(404, "Unknown tag object");
5772         }
5773
5774         my $head = git_get_head_hash($project);
5775         git_header_html();
5776         git_print_page_nav('','', $head,undef,$head);
5777         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5778         print "<div class=\"title_text\">\n" .
5779               "<table class=\"object_header\">\n" .
5780               "<tr>\n" .
5781               "<td>object</td>\n" .
5782               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5783                                $tag{'object'}) . "</td>\n" .
5784               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5785                                               $tag{'type'}) . "</td>\n" .
5786               "</tr>\n";
5787         if (defined($tag{'author'})) {
5788                 git_print_authorship_rows(\%tag, 'author');
5789         }
5790         print "</table>\n\n" .
5791               "</div>\n";
5792         print "<div class=\"page_body\">";
5793         my $comment = $tag{'comment'};
5794         foreach my $line (@$comment) {
5795                 chomp $line;
5796                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5797         }
5798         print "</div>\n";
5799         git_footer_html();
5800 }
5801
5802 sub git_blame_common {
5803         my $format = shift || 'porcelain';
5804         if ($format eq 'porcelain' && $cgi->param('js')) {
5805                 $format = 'incremental';
5806                 $action = 'blame_incremental'; # for page title etc
5807         }
5808
5809         # permissions
5810         gitweb_check_feature('blame')
5811                 or die_error(403, "Blame view not allowed");
5812
5813         # error checking
5814         die_error(400, "No file name given") unless $file_name;
5815         $hash_base ||= git_get_head_hash($project);
5816         die_error(404, "Couldn't find base commit") unless $hash_base;
5817         my %co = parse_commit($hash_base)
5818                 or die_error(404, "Commit not found");
5819         my $ftype = "blob";
5820         if (!defined $hash) {
5821                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5822                         or die_error(404, "Error looking up file");
5823         } else {
5824                 $ftype = git_get_type($hash);
5825                 if ($ftype !~ "blob") {
5826                         die_error(400, "Object is not a blob");
5827                 }
5828         }
5829
5830         my $fd;
5831         if ($format eq 'incremental') {
5832                 # get file contents (as base)
5833                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5834                         or die_error(500, "Open git-cat-file failed");
5835         } elsif ($format eq 'data') {
5836                 # run git-blame --incremental
5837                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5838                         $hash_base, "--", $file_name
5839                         or die_error(500, "Open git-blame --incremental failed");
5840         } else {
5841                 # run git-blame --porcelain
5842                 open $fd, "-|", git_cmd(), "blame", '-p',
5843                         $hash_base, '--', $file_name
5844                         or die_error(500, "Open git-blame --porcelain failed");
5845         }
5846
5847         # incremental blame data returns early
5848         if ($format eq 'data') {
5849                 print $cgi->header(
5850                         -type=>"text/plain", -charset => "utf-8",
5851                         -status=> "200 OK");
5852                 local $| = 1; # output autoflush
5853                 print while <$fd>;
5854                 close $fd
5855                         or print "ERROR $!\n";
5856
5857                 print 'END';
5858                 if (defined $t0 && gitweb_check_feature('timed')) {
5859                         print ' '.
5860                               tv_interval($t0, [ gettimeofday() ]).
5861                               ' '.$number_of_git_cmds;
5862                 }
5863                 print "\n";
5864
5865                 return;
5866         }
5867
5868         # page header
5869         git_header_html();
5870         my $formats_nav =
5871                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5872                         "blob") .
5873                 " | ";
5874         if ($format eq 'incremental') {
5875                 $formats_nav .=
5876                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5877                                 "blame") . " (non-incremental)";
5878         } else {
5879                 $formats_nav .=
5880                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5881                                 "blame") . " (incremental)";
5882         }
5883         $formats_nav .=
5884                 " | " .
5885                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5886                         "history") .
5887                 " | " .
5888                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5889                         "HEAD");
5890         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5891         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5892         git_print_page_path($file_name, $ftype, $hash_base);
5893
5894         # page body
5895         if ($format eq 'incremental') {
5896                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5897                       "This page requires JavaScript to run.\n Use ".
5898                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5899                               'this page').
5900                       " instead.\n".
5901                       "</b></center></div>\n</noscript>\n";
5902
5903                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5904         }
5905
5906         print qq!<div class="page_body">\n!;
5907         print qq!<div id="progress_info">... / ...</div>\n!
5908                 if ($format eq 'incremental');
5909         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5910               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5911               qq!<thead>\n!.
5912               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5913               qq!</thead>\n!.
5914               qq!<tbody>\n!;
5915
5916         my @rev_color = qw(light dark);
5917         my $num_colors = scalar(@rev_color);
5918         my $current_color = 0;
5919
5920         if ($format eq 'incremental') {
5921                 my $color_class = $rev_color[$current_color];
5922
5923                 #contents of a file
5924                 my $linenr = 0;
5925         LINE:
5926                 while (my $line = <$fd>) {
5927                         chomp $line;
5928                         $linenr++;
5929
5930                         print qq!<tr id="l$linenr" class="$color_class">!.
5931                               qq!<td class="sha1"><a href=""> </a></td>!.
5932                               qq!<td class="linenr">!.
5933                               qq!<a class="linenr" href="">$linenr</a></td>!;
5934                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5935                         print qq!</tr>\n!;
5936                 }
5937
5938         } else { # porcelain, i.e. ordinary blame
5939                 my %metainfo = (); # saves information about commits
5940
5941                 # blame data
5942         LINE:
5943                 while (my $line = <$fd>) {
5944                         chomp $line;
5945                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5946                         # no <lines in group> for subsequent lines in group of lines
5947                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5948                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5949                         if (!exists $metainfo{$full_rev}) {
5950                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5951                         }
5952                         my $meta = $metainfo{$full_rev};
5953                         my $data;
5954                         while ($data = <$fd>) {
5955                                 chomp $data;
5956                                 last if ($data =~ s/^\t//); # contents of line
5957                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5958                                         $meta->{$1} = $2 unless exists $meta->{$1};
5959                                 }
5960                                 if ($data =~ /^previous /) {
5961                                         $meta->{'nprevious'}++;
5962                                 }
5963                         }
5964                         my $short_rev = substr($full_rev, 0, 8);
5965                         my $author = $meta->{'author'};
5966                         my %date =
5967                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5968                         my $date = $date{'iso-tz'};
5969                         if ($group_size) {
5970                                 $current_color = ($current_color + 1) % $num_colors;
5971                         }
5972                         my $tr_class = $rev_color[$current_color];
5973                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5974                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5975                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5976                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5977                         if ($group_size) {
5978                                 print "<td class=\"sha1\"";
5979                                 print " title=\"". esc_html($author) . ", $date\"";
5980                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5981                                 print ">";
5982                                 print $cgi->a({-href => href(action=>"commit",
5983                                                              hash=>$full_rev,
5984                                                              file_name=>$file_name)},
5985                                               esc_html($short_rev));
5986                                 if ($group_size >= 2) {
5987                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5988                                         if (@author_initials) {
5989                                                 print "<br />" .
5990                                                       esc_html(join('', @author_initials));
5991                                                 #           or join('.', ...)
5992                                         }
5993                                 }
5994                                 print "</td>\n";
5995                         }
5996                         # 'previous' <sha1 of parent commit> <filename at commit>
5997                         if (exists $meta->{'previous'} &&
5998                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5999                                 $meta->{'parent'} = $1;
6000                                 $meta->{'file_parent'} = unquote($2);
6001                         }
6002                         my $linenr_commit =
6003                                 exists($meta->{'parent'}) ?
6004                                 $meta->{'parent'} : $full_rev;
6005                         my $linenr_filename =
6006                                 exists($meta->{'file_parent'}) ?
6007                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6008                         my $blamed = href(action => 'blame',
6009                                           file_name => $linenr_filename,
6010                                           hash_base => $linenr_commit);
6011                         print "<td class=\"linenr\">";
6012                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6013                                         -class => "linenr" },
6014                                       esc_html($lineno));
6015                         print "</td>";
6016                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6017                         print "</tr>\n";
6018                 } # end while
6019
6020         }
6021
6022         # footer
6023         print "</tbody>\n".
6024               "</table>\n"; # class="blame"
6025         print "</div>\n";   # class="blame_body"
6026         close $fd
6027                 or print "Reading blob failed\n";
6028
6029         git_footer_html();
6030 }
6031
6032 sub git_blame {
6033         git_blame_common();
6034 }
6035
6036 sub git_blame_incremental {
6037         git_blame_common('incremental');
6038 }
6039
6040 sub git_blame_data {
6041         git_blame_common('data');
6042 }
6043
6044 sub git_tags {
6045         my $head = git_get_head_hash($project);
6046         git_header_html();
6047         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6048         git_print_header_div('summary', $project);
6049
6050         my @tagslist = git_get_tags_list();
6051         if (@tagslist) {
6052                 git_tags_body(\@tagslist);
6053         }
6054         git_footer_html();
6055 }
6056
6057 sub git_heads {
6058         my $head = git_get_head_hash($project);
6059         git_header_html();
6060         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6061         git_print_header_div('summary', $project);
6062
6063         my @headslist = git_get_heads_list();
6064         if (@headslist) {
6065                 git_heads_body(\@headslist, $head);
6066         }
6067         git_footer_html();
6068 }
6069
6070 # used both for single remote view and for list of all the remotes
6071 sub git_remotes {
6072         gitweb_check_feature('remote_heads')
6073                 or die_error(403, "Remote heads view is disabled");
6074
6075         my $head = git_get_head_hash($project);
6076         my $remote = $input_params{'hash'};
6077
6078         my $remotedata = git_get_remotes_list($remote);
6079         die_error(500, "Unable to get remote information") unless defined $remotedata;
6080
6081         unless (%$remotedata) {
6082                 die_error(404, defined $remote ?
6083                         "Remote $remote not found" :
6084                         "No remotes found");
6085         }
6086
6087         git_header_html(undef, undef, -action_extra => $remote);
6088         git_print_page_nav('', '',  $head, undef, $head,
6089                 format_ref_views($remote ? '' : 'remotes'));
6090
6091         fill_remote_heads($remotedata);
6092         if (defined $remote) {
6093                 git_print_header_div('remotes', "$remote remote for $project");
6094                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6095         } else {
6096                 git_print_header_div('summary', "$project remotes");
6097                 git_remotes_body($remotedata, undef, $head);
6098         }
6099
6100         git_footer_html();
6101 }
6102
6103 sub git_blob_plain {
6104         my $type = shift;
6105         my $expires;
6106
6107         if (!defined $hash) {
6108                 if (defined $file_name) {
6109                         my $base = $hash_base || git_get_head_hash($project);
6110                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6111                                 or die_error(404, "Cannot find file");
6112                 } else {
6113                         die_error(400, "No file name defined");
6114                 }
6115         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6116                 # blobs defined by non-textual hash id's can be cached
6117                 $expires = "+1d";
6118         }
6119
6120         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6121                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6122
6123         # content-type (can include charset)
6124         $type = blob_contenttype($fd, $file_name, $type);
6125
6126         # "save as" filename, even when no $file_name is given
6127         my $save_as = "$hash";
6128         if (defined $file_name) {
6129                 $save_as = $file_name;
6130         } elsif ($type =~ m/^text\//) {
6131                 $save_as .= '.txt';
6132         }
6133
6134         # With XSS prevention on, blobs of all types except a few known safe
6135         # ones are served with "Content-Disposition: attachment" to make sure
6136         # they don't run in our security domain.  For certain image types,
6137         # blob view writes an <img> tag referring to blob_plain view, and we
6138         # want to be sure not to break that by serving the image as an
6139         # attachment (though Firefox 3 doesn't seem to care).
6140         my $sandbox = $prevent_xss &&
6141                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6142
6143         # serve text/* as text/plain
6144         if ($prevent_xss &&
6145             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6146              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6147                 my $rest = $1;
6148                 $rest = defined $rest ? $rest : '';
6149                 $type = "text/plain$rest";
6150         }
6151
6152         print $cgi->header(
6153                 -type => $type,
6154                 -expires => $expires,
6155                 -content_disposition =>
6156                         ($sandbox ? 'attachment' : 'inline')
6157                         . '; filename="' . $save_as . '"');
6158         local $/ = undef;
6159         binmode STDOUT, ':raw';
6160         print <$fd>;
6161         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6162         close $fd;
6163 }
6164
6165 sub git_blob {
6166         my $expires;
6167
6168         if (!defined $hash) {
6169                 if (defined $file_name) {
6170                         my $base = $hash_base || git_get_head_hash($project);
6171                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6172                                 or die_error(404, "Cannot find file");
6173                 } else {
6174                         die_error(400, "No file name defined");
6175                 }
6176         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6177                 # blobs defined by non-textual hash id's can be cached
6178                 $expires = "+1d";
6179         }
6180
6181         my $have_blame = gitweb_check_feature('blame');
6182         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6183                 or die_error(500, "Couldn't cat $file_name, $hash");
6184         my $mimetype = blob_mimetype($fd, $file_name);
6185         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6186         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6187                 close $fd;
6188                 return git_blob_plain($mimetype);
6189         }
6190         # we can have blame only for text/* mimetype
6191         $have_blame &&= ($mimetype =~ m!^text/!);
6192
6193         my $highlight = gitweb_check_feature('highlight');
6194         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6195         $fd = run_highlighter($fd, $highlight, $syntax)
6196                 if $syntax;
6197
6198         git_header_html(undef, $expires);
6199         my $formats_nav = '';
6200         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6201                 if (defined $file_name) {
6202                         if ($have_blame) {
6203                                 $formats_nav .=
6204                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6205                                                 "blame") .
6206                                         " | ";
6207                         }
6208                         $formats_nav .=
6209                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6210                                         "history") .
6211                                 " | " .
6212                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6213                                         "raw") .
6214                                 " | " .
6215                                 $cgi->a({-href => href(action=>"blob",
6216                                                        hash_base=>"HEAD", file_name=>$file_name)},
6217                                         "HEAD");
6218                 } else {
6219                         $formats_nav .=
6220                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6221                                         "raw");
6222                 }
6223                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6224                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6225         } else {
6226                 print "<div class=\"page_nav\">\n" .
6227                       "<br/><br/></div>\n" .
6228                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6229         }
6230         git_print_page_path($file_name, "blob", $hash_base);
6231         print "<div class=\"page_body\">\n";
6232         if ($mimetype =~ m!^image/!) {
6233                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6234                 if ($file_name) {
6235                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6236                 }
6237                 print qq! src="! .
6238                       href(action=>"blob_plain", hash=>$hash,
6239                            hash_base=>$hash_base, file_name=>$file_name) .
6240                       qq!" />\n!;
6241         } else {
6242                 my $nr;
6243                 while (my $line = <$fd>) {
6244                         chomp $line;
6245                         $nr++;
6246                         $line = untabify($line);
6247                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6248                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6249                 }
6250         }
6251         close $fd
6252                 or print "Reading blob failed.\n";
6253         print "</div>";
6254         git_footer_html();
6255 }
6256
6257 sub git_tree {
6258         if (!defined $hash_base) {
6259                 $hash_base = "HEAD";
6260         }
6261         if (!defined $hash) {
6262                 if (defined $file_name) {
6263                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6264                 } else {
6265                         $hash = $hash_base;
6266                 }
6267         }
6268         die_error(404, "No such tree") unless defined($hash);
6269
6270         my $show_sizes = gitweb_check_feature('show-sizes');
6271         my $have_blame = gitweb_check_feature('blame');
6272
6273         my @entries = ();
6274         {
6275                 local $/ = "\0";
6276                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6277                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6278                         or die_error(500, "Open git-ls-tree failed");
6279                 @entries = map { chomp; $_ } <$fd>;
6280                 close $fd
6281                         or die_error(404, "Reading tree failed");
6282         }
6283
6284         my $refs = git_get_references();
6285         my $ref = format_ref_marker($refs, $hash_base);
6286         git_header_html();
6287         my $basedir = '';
6288         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6289                 my @views_nav = ();
6290                 if (defined $file_name) {
6291                         push @views_nav,
6292                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6293                                         "history"),
6294                                 $cgi->a({-href => href(action=>"tree",
6295                                                        hash_base=>"HEAD", file_name=>$file_name)},
6296                                         "HEAD"),
6297                 }
6298                 my $snapshot_links = format_snapshot_links($hash);
6299                 if (defined $snapshot_links) {
6300                         # FIXME: Should be available when we have no hash base as well.
6301                         push @views_nav, $snapshot_links;
6302                 }
6303                 git_print_page_nav('tree','', $hash_base, undef, undef,
6304                                    join(' | ', @views_nav));
6305                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6306         } else {
6307                 undef $hash_base;
6308                 print "<div class=\"page_nav\">\n";
6309                 print "<br/><br/></div>\n";
6310                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6311         }
6312         if (defined $file_name) {
6313                 $basedir = $file_name;
6314                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6315                         $basedir .= '/';
6316                 }
6317                 git_print_page_path($file_name, 'tree', $hash_base);
6318         }
6319         print "<div class=\"page_body\">\n";
6320         print "<table class=\"tree\">\n";
6321         my $alternate = 1;
6322         # '..' (top directory) link if possible
6323         if (defined $hash_base &&
6324             defined $file_name && $file_name =~ m![^/]+$!) {
6325                 if ($alternate) {
6326                         print "<tr class=\"dark\">\n";
6327                 } else {
6328                         print "<tr class=\"light\">\n";
6329                 }
6330                 $alternate ^= 1;
6331
6332                 my $up = $file_name;
6333                 $up =~ s!/?[^/]+$!!;
6334                 undef $up unless $up;
6335                 # based on git_print_tree_entry
6336                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6337                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6338                 print '<td class="list">';
6339                 print $cgi->a({-href => href(action=>"tree",
6340                                              hash_base=>$hash_base,
6341                                              file_name=>$up)},
6342                               "..");
6343                 print "</td>\n";
6344                 print "<td class=\"link\"></td>\n";
6345
6346                 print "</tr>\n";
6347         }
6348         foreach my $line (@entries) {
6349                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6350
6351                 if ($alternate) {
6352                         print "<tr class=\"dark\">\n";
6353                 } else {
6354                         print "<tr class=\"light\">\n";
6355                 }
6356                 $alternate ^= 1;
6357
6358                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6359
6360                 print "</tr>\n";
6361         }
6362         print "</table>\n" .
6363               "</div>";
6364         git_footer_html();
6365 }
6366
6367 sub snapshot_name {
6368         my ($project, $hash) = @_;
6369
6370         # path/to/project.git  -> project
6371         # path/to/project/.git -> project
6372         my $name = to_utf8($project);
6373         $name =~ s,([^/])/*\.git$,$1,;
6374         $name = basename($name);
6375         # sanitize name
6376         $name =~ s/[[:cntrl:]]/?/g;
6377
6378         my $ver = $hash;
6379         if ($hash =~ /^[0-9a-fA-F]+$/) {
6380                 # shorten SHA-1 hash
6381                 my $full_hash = git_get_full_hash($project, $hash);
6382                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6383                         $ver = git_get_short_hash($project, $hash);
6384                 }
6385         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6386                 # tags don't need shortened SHA-1 hash
6387                 $ver = $1;
6388         } else {
6389                 # branches and other need shortened SHA-1 hash
6390                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6391                         $ver = $1;
6392                 }
6393                 $ver .= '-' . git_get_short_hash($project, $hash);
6394         }
6395         # in case of hierarchical branch names
6396         $ver =~ s!/!.!g;
6397
6398         # name = project-version_string
6399         $name = "$name-$ver";
6400
6401         return wantarray ? ($name, $name) : $name;
6402 }
6403
6404 sub git_snapshot {
6405         my $format = $input_params{'snapshot_format'};
6406         if (!@snapshot_fmts) {
6407                 die_error(403, "Snapshots not allowed");
6408         }
6409         # default to first supported snapshot format
6410         $format ||= $snapshot_fmts[0];
6411         if ($format !~ m/^[a-z0-9]+$/) {
6412                 die_error(400, "Invalid snapshot format parameter");
6413         } elsif (!exists($known_snapshot_formats{$format})) {
6414                 die_error(400, "Unknown snapshot format");
6415         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6416                 die_error(403, "Snapshot format not allowed");
6417         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6418                 die_error(403, "Unsupported snapshot format");
6419         }
6420
6421         my $type = git_get_type("$hash^{}");
6422         if (!$type) {
6423                 die_error(404, 'Object does not exist');
6424         }  elsif ($type eq 'blob') {
6425                 die_error(400, 'Object is not a tree-ish');
6426         }
6427
6428         my ($name, $prefix) = snapshot_name($project, $hash);
6429         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6430         my $cmd = quote_command(
6431                 git_cmd(), 'archive',
6432                 "--format=$known_snapshot_formats{$format}{'format'}",
6433                 "--prefix=$prefix/", $hash);
6434         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6435                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6436         }
6437
6438         $filename =~ s/(["\\])/\\$1/g;
6439         print $cgi->header(
6440                 -type => $known_snapshot_formats{$format}{'type'},
6441                 -content_disposition => 'inline; filename="' . $filename . '"',
6442                 -status => '200 OK');
6443
6444         open my $fd, "-|", $cmd
6445                 or die_error(500, "Execute git-archive failed");
6446         binmode STDOUT, ':raw';
6447         print <$fd>;
6448         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6449         close $fd;
6450 }
6451
6452 sub git_log_generic {
6453         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6454
6455         my $head = git_get_head_hash($project);
6456         if (!defined $base) {
6457                 $base = $head;
6458         }
6459         if (!defined $page) {
6460                 $page = 0;
6461         }
6462         my $refs = git_get_references();
6463
6464         my $commit_hash = $base;
6465         if (defined $parent) {
6466                 $commit_hash = "$parent..$base";
6467         }
6468         my @commitlist =
6469                 parse_commits($commit_hash, 101, (100 * $page),
6470                               defined $file_name ? ($file_name, "--full-history") : ());
6471
6472         my $ftype;
6473         if (!defined $file_hash && defined $file_name) {
6474                 # some commits could have deleted file in question,
6475                 # and not have it in tree, but one of them has to have it
6476                 for (my $i = 0; $i < @commitlist; $i++) {
6477                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6478                         last if defined $file_hash;
6479                 }
6480         }
6481         if (defined $file_hash) {
6482                 $ftype = git_get_type($file_hash);
6483         }
6484         if (defined $file_name && !defined $ftype) {
6485                 die_error(500, "Unknown type of object");
6486         }
6487         my %co;
6488         if (defined $file_name) {
6489                 %co = parse_commit($base)
6490                         or die_error(404, "Unknown commit object");
6491         }
6492
6493
6494         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6495         my $next_link = '';
6496         if ($#commitlist >= 100) {
6497                 $next_link =
6498                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6499                                  -accesskey => "n", -title => "Alt-n"}, "next");
6500         }
6501         my $patch_max = gitweb_get_feature('patches');
6502         if ($patch_max && !defined $file_name) {
6503                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6504                         $paging_nav .= " &sdot; " .
6505                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6506                                         "patches");
6507                 }
6508         }
6509
6510         git_header_html();
6511         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6512         if (defined $file_name) {
6513                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6514         } else {
6515                 git_print_header_div('summary', $project)
6516         }
6517         git_print_page_path($file_name, $ftype, $hash_base)
6518                 if (defined $file_name);
6519
6520         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6521                      $file_name, $file_hash, $ftype);
6522
6523         git_footer_html();
6524 }
6525
6526 sub git_log {
6527         git_log_generic('log', \&git_log_body,
6528                         $hash, $hash_parent);
6529 }
6530
6531 sub git_commit {
6532         $hash ||= $hash_base || "HEAD";
6533         my %co = parse_commit($hash)
6534             or die_error(404, "Unknown commit object");
6535
6536         my $parent  = $co{'parent'};
6537         my $parents = $co{'parents'}; # listref
6538
6539         # we need to prepare $formats_nav before any parameter munging
6540         my $formats_nav;
6541         if (!defined $parent) {
6542                 # --root commitdiff
6543                 $formats_nav .= '(initial)';
6544         } elsif (@$parents == 1) {
6545                 # single parent commit
6546                 $formats_nav .=
6547                         '(parent: ' .
6548                         $cgi->a({-href => href(action=>"commit",
6549                                                hash=>$parent)},
6550                                 esc_html(substr($parent, 0, 7))) .
6551                         ')';
6552         } else {
6553                 # merge commit
6554                 $formats_nav .=
6555                         '(merge: ' .
6556                         join(' ', map {
6557                                 $cgi->a({-href => href(action=>"commit",
6558                                                        hash=>$_)},
6559                                         esc_html(substr($_, 0, 7)));
6560                         } @$parents ) .
6561                         ')';
6562         }
6563         if (gitweb_check_feature('patches') && @$parents <= 1) {
6564                 $formats_nav .= " | " .
6565                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6566                                 "patch");
6567         }
6568
6569         if (!defined $parent) {
6570                 $parent = "--root";
6571         }
6572         my @difftree;
6573         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6574                 @diff_opts,
6575                 (@$parents <= 1 ? $parent : '-c'),
6576                 $hash, "--"
6577                 or die_error(500, "Open git-diff-tree failed");
6578         @difftree = map { chomp; $_ } <$fd>;
6579         close $fd or die_error(404, "Reading git-diff-tree failed");
6580
6581         # non-textual hash id's can be cached
6582         my $expires;
6583         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6584                 $expires = "+1d";
6585         }
6586         my $refs = git_get_references();
6587         my $ref = format_ref_marker($refs, $co{'id'});
6588
6589         git_header_html(undef, $expires);
6590         git_print_page_nav('commit', '',
6591                            $hash, $co{'tree'}, $hash,
6592                            $formats_nav);
6593
6594         if (defined $co{'parent'}) {
6595                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6596         } else {
6597                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6598         }
6599         print "<div class=\"title_text\">\n" .
6600               "<table class=\"object_header\">\n";
6601         git_print_authorship_rows(\%co);
6602         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6603         print "<tr>" .
6604               "<td>tree</td>" .
6605               "<td class=\"sha1\">" .
6606               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6607                        class => "list"}, $co{'tree'}) .
6608               "</td>" .
6609               "<td class=\"link\">" .
6610               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6611                       "tree");
6612         my $snapshot_links = format_snapshot_links($hash);
6613         if (defined $snapshot_links) {
6614                 print " | " . $snapshot_links;
6615         }
6616         print "</td>" .
6617               "</tr>\n";
6618
6619         foreach my $par (@$parents) {
6620                 print "<tr>" .
6621                       "<td>parent</td>" .
6622                       "<td class=\"sha1\">" .
6623                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6624                                class => "list"}, $par) .
6625                       "</td>" .
6626                       "<td class=\"link\">" .
6627                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6628                       " | " .
6629                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6630                       "</td>" .
6631                       "</tr>\n";
6632         }
6633         print "</table>".
6634               "</div>\n";
6635
6636         print "<div class=\"page_body\">\n";
6637         git_print_log($co{'comment'});
6638         print "</div>\n";
6639
6640         git_difftree_body(\@difftree, $hash, @$parents);
6641
6642         git_footer_html();
6643 }
6644
6645 sub git_object {
6646         # object is defined by:
6647         # - hash or hash_base alone
6648         # - hash_base and file_name
6649         my $type;
6650
6651         # - hash or hash_base alone
6652         if ($hash || ($hash_base && !defined $file_name)) {
6653                 my $object_id = $hash || $hash_base;
6654
6655                 open my $fd, "-|", quote_command(
6656                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6657                         or die_error(404, "Object does not exist");
6658                 $type = <$fd>;
6659                 chomp $type;
6660                 close $fd
6661                         or die_error(404, "Object does not exist");
6662
6663         # - hash_base and file_name
6664         } elsif ($hash_base && defined $file_name) {
6665                 $file_name =~ s,/+$,,;
6666
6667                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6668                         or die_error(404, "Base object does not exist");
6669
6670                 # here errors should not hapen
6671                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6672                         or die_error(500, "Open git-ls-tree failed");
6673                 my $line = <$fd>;
6674                 close $fd;
6675
6676                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6677                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6678                         die_error(404, "File or directory for given base does not exist");
6679                 }
6680                 $type = $2;
6681                 $hash = $3;
6682         } else {
6683                 die_error(400, "Not enough information to find object");
6684         }
6685
6686         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6687                                           hash=>$hash, hash_base=>$hash_base,
6688                                           file_name=>$file_name),
6689                              -status => '302 Found');
6690 }
6691
6692 sub git_blobdiff {
6693         my $format = shift || 'html';
6694
6695         my $fd;
6696         my @difftree;
6697         my %diffinfo;
6698         my $expires;
6699
6700         # preparing $fd and %diffinfo for git_patchset_body
6701         # new style URI
6702         if (defined $hash_base && defined $hash_parent_base) {
6703                 if (defined $file_name) {
6704                         # read raw output
6705                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6706                                 $hash_parent_base, $hash_base,
6707                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6708                                 or die_error(500, "Open git-diff-tree failed");
6709                         @difftree = map { chomp; $_ } <$fd>;
6710                         close $fd
6711                                 or die_error(404, "Reading git-diff-tree failed");
6712                         @difftree
6713                                 or die_error(404, "Blob diff not found");
6714
6715                 } elsif (defined $hash &&
6716                          $hash =~ /[0-9a-fA-F]{40}/) {
6717                         # try to find filename from $hash
6718
6719                         # read filtered raw output
6720                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6721                                 $hash_parent_base, $hash_base, "--"
6722                                 or die_error(500, "Open git-diff-tree failed");
6723                         @difftree =
6724                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6725                                 # $hash == to_id
6726                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6727                                 map { chomp; $_ } <$fd>;
6728                         close $fd
6729                                 or die_error(404, "Reading git-diff-tree failed");
6730                         @difftree
6731                                 or die_error(404, "Blob diff not found");
6732
6733                 } else {
6734                         die_error(400, "Missing one of the blob diff parameters");
6735                 }
6736
6737                 if (@difftree > 1) {
6738                         die_error(400, "Ambiguous blob diff specification");
6739                 }
6740
6741                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6742                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6743                 $file_name   ||= $diffinfo{'to_file'};
6744
6745                 $hash_parent ||= $diffinfo{'from_id'};
6746                 $hash        ||= $diffinfo{'to_id'};
6747
6748                 # non-textual hash id's can be cached
6749                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6750                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6751                         $expires = '+1d';
6752                 }
6753
6754                 # open patch output
6755                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6756                         '-p', ($format eq 'html' ? "--full-index" : ()),
6757                         $hash_parent_base, $hash_base,
6758                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6759                         or die_error(500, "Open git-diff-tree failed");
6760         }
6761
6762         # old/legacy style URI -- not generated anymore since 1.4.3.
6763         if (!%diffinfo) {
6764                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6765         }
6766
6767         # header
6768         if ($format eq 'html') {
6769                 my $formats_nav =
6770                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6771                                 "raw");
6772                 git_header_html(undef, $expires);
6773                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6774                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6775                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6776                 } else {
6777                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6778                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6779                 }
6780                 if (defined $file_name) {
6781                         git_print_page_path($file_name, "blob", $hash_base);
6782                 } else {
6783                         print "<div class=\"page_path\"></div>\n";
6784                 }
6785
6786         } elsif ($format eq 'plain') {
6787                 print $cgi->header(
6788                         -type => 'text/plain',
6789                         -charset => 'utf-8',
6790                         -expires => $expires,
6791                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6792
6793                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6794
6795         } else {
6796                 die_error(400, "Unknown blobdiff format");
6797         }
6798
6799         # patch
6800         if ($format eq 'html') {
6801                 print "<div class=\"page_body\">\n";
6802
6803                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6804                 close $fd;
6805
6806                 print "</div>\n"; # class="page_body"
6807                 git_footer_html();
6808
6809         } else {
6810                 while (my $line = <$fd>) {
6811                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6812                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6813
6814                         print $line;
6815
6816                         last if $line =~ m!^\+\+\+!;
6817                 }
6818                 local $/ = undef;
6819                 print <$fd>;
6820                 close $fd;
6821         }
6822 }
6823
6824 sub git_blobdiff_plain {
6825         git_blobdiff('plain');
6826 }
6827
6828 sub git_commitdiff {
6829         my %params = @_;
6830         my $format = $params{-format} || 'html';
6831
6832         my ($patch_max) = gitweb_get_feature('patches');
6833         if ($format eq 'patch') {
6834                 die_error(403, "Patch view not allowed") unless $patch_max;
6835         }
6836
6837         $hash ||= $hash_base || "HEAD";
6838         my %co = parse_commit($hash)
6839             or die_error(404, "Unknown commit object");
6840
6841         # choose format for commitdiff for merge
6842         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6843                 $hash_parent = '--cc';
6844         }
6845         # we need to prepare $formats_nav before almost any parameter munging
6846         my $formats_nav;
6847         if ($format eq 'html') {
6848                 $formats_nav =
6849                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6850                                 "raw");
6851                 if ($patch_max && @{$co{'parents'}} <= 1) {
6852                         $formats_nav .= " | " .
6853                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6854                                         "patch");
6855                 }
6856
6857                 if (defined $hash_parent &&
6858                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6859                         # commitdiff with two commits given
6860                         my $hash_parent_short = $hash_parent;
6861                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6862                                 $hash_parent_short = substr($hash_parent, 0, 7);
6863                         }
6864                         $formats_nav .=
6865                                 ' (from';
6866                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6867                                 if ($co{'parents'}[$i] eq $hash_parent) {
6868                                         $formats_nav .= ' parent ' . ($i+1);
6869                                         last;
6870                                 }
6871                         }
6872                         $formats_nav .= ': ' .
6873                                 $cgi->a({-href => href(action=>"commitdiff",
6874                                                        hash=>$hash_parent)},
6875                                         esc_html($hash_parent_short)) .
6876                                 ')';
6877                 } elsif (!$co{'parent'}) {
6878                         # --root commitdiff
6879                         $formats_nav .= ' (initial)';
6880                 } elsif (scalar @{$co{'parents'}} == 1) {
6881                         # single parent commit
6882                         $formats_nav .=
6883                                 ' (parent: ' .
6884                                 $cgi->a({-href => href(action=>"commitdiff",
6885                                                        hash=>$co{'parent'})},
6886                                         esc_html(substr($co{'parent'}, 0, 7))) .
6887                                 ')';
6888                 } else {
6889                         # merge commit
6890                         if ($hash_parent eq '--cc') {
6891                                 $formats_nav .= ' | ' .
6892                                         $cgi->a({-href => href(action=>"commitdiff",
6893                                                                hash=>$hash, hash_parent=>'-c')},
6894                                                 'combined');
6895                         } else { # $hash_parent eq '-c'
6896                                 $formats_nav .= ' | ' .
6897                                         $cgi->a({-href => href(action=>"commitdiff",
6898                                                                hash=>$hash, hash_parent=>'--cc')},
6899                                                 'compact');
6900                         }
6901                         $formats_nav .=
6902                                 ' (merge: ' .
6903                                 join(' ', map {
6904                                         $cgi->a({-href => href(action=>"commitdiff",
6905                                                                hash=>$_)},
6906                                                 esc_html(substr($_, 0, 7)));
6907                                 } @{$co{'parents'}} ) .
6908                                 ')';
6909                 }
6910         }
6911
6912         my $hash_parent_param = $hash_parent;
6913         if (!defined $hash_parent_param) {
6914                 # --cc for multiple parents, --root for parentless
6915                 $hash_parent_param =
6916                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6917         }
6918
6919         # read commitdiff
6920         my $fd;
6921         my @difftree;
6922         if ($format eq 'html') {
6923                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6924                         "--no-commit-id", "--patch-with-raw", "--full-index",
6925                         $hash_parent_param, $hash, "--"
6926                         or die_error(500, "Open git-diff-tree failed");
6927
6928                 while (my $line = <$fd>) {
6929                         chomp $line;
6930                         # empty line ends raw part of diff-tree output
6931                         last unless $line;
6932                         push @difftree, scalar parse_difftree_raw_line($line);
6933                 }
6934
6935         } elsif ($format eq 'plain') {
6936                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6937                         '-p', $hash_parent_param, $hash, "--"
6938                         or die_error(500, "Open git-diff-tree failed");
6939         } elsif ($format eq 'patch') {
6940                 # For commit ranges, we limit the output to the number of
6941                 # patches specified in the 'patches' feature.
6942                 # For single commits, we limit the output to a single patch,
6943                 # diverging from the git-format-patch default.
6944                 my @commit_spec = ();
6945                 if ($hash_parent) {
6946                         if ($patch_max > 0) {
6947                                 push @commit_spec, "-$patch_max";
6948                         }
6949                         push @commit_spec, '-n', "$hash_parent..$hash";
6950                 } else {
6951                         if ($params{-single}) {
6952                                 push @commit_spec, '-1';
6953                         } else {
6954                                 if ($patch_max > 0) {
6955                                         push @commit_spec, "-$patch_max";
6956                                 }
6957                                 push @commit_spec, "-n";
6958                         }
6959                         push @commit_spec, '--root', $hash;
6960                 }
6961                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6962                         '--encoding=utf8', '--stdout', @commit_spec
6963                         or die_error(500, "Open git-format-patch failed");
6964         } else {
6965                 die_error(400, "Unknown commitdiff format");
6966         }
6967
6968         # non-textual hash id's can be cached
6969         my $expires;
6970         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6971                 $expires = "+1d";
6972         }
6973
6974         # write commit message
6975         if ($format eq 'html') {
6976                 my $refs = git_get_references();
6977                 my $ref = format_ref_marker($refs, $co{'id'});
6978
6979                 git_header_html(undef, $expires);
6980                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6981                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6982                 print "<div class=\"title_text\">\n" .
6983                       "<table class=\"object_header\">\n";
6984                 git_print_authorship_rows(\%co);
6985                 print "</table>".
6986                       "</div>\n";
6987                 print "<div class=\"page_body\">\n";
6988                 if (@{$co{'comment'}} > 1) {
6989                         print "<div class=\"log\">\n";
6990                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6991                         print "</div>\n"; # class="log"
6992                 }
6993
6994         } elsif ($format eq 'plain') {
6995                 my $refs = git_get_references("tags");
6996                 my $tagname = git_get_rev_name_tags($hash);
6997                 my $filename = basename($project) . "-$hash.patch";
6998
6999                 print $cgi->header(
7000                         -type => 'text/plain',
7001                         -charset => 'utf-8',
7002                         -expires => $expires,
7003                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7004                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7005                 print "From: " . to_utf8($co{'author'}) . "\n";
7006                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7007                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7008
7009                 print "X-Git-Tag: $tagname\n" if $tagname;
7010                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7011
7012                 foreach my $line (@{$co{'comment'}}) {
7013                         print to_utf8($line) . "\n";
7014                 }
7015                 print "---\n\n";
7016         } elsif ($format eq 'patch') {
7017                 my $filename = basename($project) . "-$hash.patch";
7018
7019                 print $cgi->header(
7020                         -type => 'text/plain',
7021                         -charset => 'utf-8',
7022                         -expires => $expires,
7023                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7024         }
7025
7026         # write patch
7027         if ($format eq 'html') {
7028                 my $use_parents = !defined $hash_parent ||
7029                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7030                 git_difftree_body(\@difftree, $hash,
7031                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7032                 print "<br/>\n";
7033
7034                 git_patchset_body($fd, \@difftree, $hash,
7035                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7036                 close $fd;
7037                 print "</div>\n"; # class="page_body"
7038                 git_footer_html();
7039
7040         } elsif ($format eq 'plain') {
7041                 local $/ = undef;
7042                 print <$fd>;
7043                 close $fd
7044                         or print "Reading git-diff-tree failed\n";
7045         } elsif ($format eq 'patch') {
7046                 local $/ = undef;
7047                 print <$fd>;
7048                 close $fd
7049                         or print "Reading git-format-patch failed\n";
7050         }
7051 }
7052
7053 sub git_commitdiff_plain {
7054         git_commitdiff(-format => 'plain');
7055 }
7056
7057 # format-patch-style patches
7058 sub git_patch {
7059         git_commitdiff(-format => 'patch', -single => 1);
7060 }
7061
7062 sub git_patches {
7063         git_commitdiff(-format => 'patch');
7064 }
7065
7066 sub git_history {
7067         git_log_generic('history', \&git_history_body,
7068                         $hash_base, $hash_parent_base,
7069                         $file_name, $hash);
7070 }
7071
7072 sub git_search {
7073         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7074         if (!defined $searchtext) {
7075                 die_error(400, "Text field is empty");
7076         }
7077         if (!defined $hash) {
7078                 $hash = git_get_head_hash($project);
7079         }
7080         my %co = parse_commit($hash);
7081         if (!%co) {
7082                 die_error(404, "Unknown commit object");
7083         }
7084         if (!defined $page) {
7085                 $page = 0;
7086         }
7087
7088         $searchtype ||= 'commit';
7089         if ($searchtype eq 'pickaxe') {
7090                 # pickaxe may take all resources of your box and run for several minutes
7091                 # with every query - so decide by yourself how public you make this feature
7092                 gitweb_check_feature('pickaxe')
7093                     or die_error(403, "Pickaxe is disabled");
7094         }
7095         if ($searchtype eq 'grep') {
7096                 gitweb_check_feature('grep')
7097                     or die_error(403, "Grep is disabled");
7098         }
7099
7100         git_header_html();
7101
7102         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7103                 my $greptype;
7104                 if ($searchtype eq 'commit') {
7105                         $greptype = "--grep=";
7106                 } elsif ($searchtype eq 'author') {
7107                         $greptype = "--author=";
7108                 } elsif ($searchtype eq 'committer') {
7109                         $greptype = "--committer=";
7110                 }
7111                 $greptype .= $searchtext;
7112                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7113                                                $greptype, '--regexp-ignore-case',
7114                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7115
7116                 my $paging_nav = '';
7117                 if ($page > 0) {
7118                         $paging_nav .=
7119                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7120                                                        searchtext=>$searchtext,
7121                                                        searchtype=>$searchtype)},
7122                                         "first");
7123                         $paging_nav .= " &sdot; " .
7124                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7125                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7126                 } else {
7127                         $paging_nav .= "first";
7128                         $paging_nav .= " &sdot; prev";
7129                 }
7130                 my $next_link = '';
7131                 if ($#commitlist >= 100) {
7132                         $next_link =
7133                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7134                                          -accesskey => "n", -title => "Alt-n"}, "next");
7135                         $paging_nav .= " &sdot; $next_link";
7136                 } else {
7137                         $paging_nav .= " &sdot; next";
7138                 }
7139
7140                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7141                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7142                 if ($page == 0 && !@commitlist) {
7143                         print "<p>No match.</p>\n";
7144                 } else {
7145                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7146                 }
7147         }
7148
7149         if ($searchtype eq 'pickaxe') {
7150                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7151                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7152
7153                 print "<table class=\"pickaxe search\">\n";
7154                 my $alternate = 1;
7155                 local $/ = "\n";
7156                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7157                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7158                         ($search_use_regexp ? '--pickaxe-regex' : ());
7159                 undef %co;
7160                 my @files;
7161                 while (my $line = <$fd>) {
7162                         chomp $line;
7163                         next unless $line;
7164
7165                         my %set = parse_difftree_raw_line($line);
7166                         if (defined $set{'commit'}) {
7167                                 # finish previous commit
7168                                 if (%co) {
7169                                         print "</td>\n" .
7170                                               "<td class=\"link\">" .
7171                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7172                                               " | " .
7173                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7174                                         print "</td>\n" .
7175                                               "</tr>\n";
7176                                 }
7177
7178                                 if ($alternate) {
7179                                         print "<tr class=\"dark\">\n";
7180                                 } else {
7181                                         print "<tr class=\"light\">\n";
7182                                 }
7183                                 $alternate ^= 1;
7184                                 %co = parse_commit($set{'commit'});
7185                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7186                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7187                                       "<td><i>$author</i></td>\n" .
7188                                       "<td>" .
7189                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7190                                               -class => "list subject"},
7191                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7192                         } elsif (defined $set{'to_id'}) {
7193                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7194
7195                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7196                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7197                                               -class => "list"},
7198                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7199                                       "<br/>\n";
7200                         }
7201                 }
7202                 close $fd;
7203
7204                 # finish last commit (warning: repetition!)
7205                 if (%co) {
7206                         print "</td>\n" .
7207                               "<td class=\"link\">" .
7208                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7209                               " | " .
7210                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7211                         print "</td>\n" .
7212                               "</tr>\n";
7213                 }
7214
7215                 print "</table>\n";
7216         }
7217
7218         if ($searchtype eq 'grep') {
7219                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7220                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7221
7222                 print "<table class=\"grep_search\">\n";
7223                 my $alternate = 1;
7224                 my $matches = 0;
7225                 local $/ = "\n";
7226                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7227                         $search_use_regexp ? ('-E', '-i') : '-F',
7228                         $searchtext, $co{'tree'};
7229                 my $lastfile = '';
7230                 while (my $line = <$fd>) {
7231                         chomp $line;
7232                         my ($file, $lno, $ltext, $binary);
7233                         last if ($matches++ > 1000);
7234                         if ($line =~ /^Binary file (.+) matches$/) {
7235                                 $file = $1;
7236                                 $binary = 1;
7237                         } else {
7238                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7239                         }
7240                         if ($file ne $lastfile) {
7241                                 $lastfile and print "</td></tr>\n";
7242                                 if ($alternate++) {
7243                                         print "<tr class=\"dark\">\n";
7244                                 } else {
7245                                         print "<tr class=\"light\">\n";
7246                                 }
7247                                 print "<td class=\"list\">".
7248                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7249                                                                file_name=>"$file"),
7250                                                 -class => "list"}, esc_path($file));
7251                                 print "</td><td>\n";
7252                                 $lastfile = $file;
7253                         }
7254                         if ($binary) {
7255                                 print "<div class=\"binary\">Binary file</div>\n";
7256                         } else {
7257                                 $ltext = untabify($ltext);
7258                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7259                                         $ltext = esc_html($1, -nbsp=>1);
7260                                         $ltext .= '<span class="match">';
7261                                         $ltext .= esc_html($2, -nbsp=>1);
7262                                         $ltext .= '</span>';
7263                                         $ltext .= esc_html($3, -nbsp=>1);
7264                                 } else {
7265                                         $ltext = esc_html($ltext, -nbsp=>1);
7266                                 }
7267                                 print "<div class=\"pre\">" .
7268                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7269                                                                file_name=>"$file").'#l'.$lno,
7270                                                 -class => "linenr"}, sprintf('%4i', $lno))
7271                                         . ' ' .  $ltext . "</div>\n";
7272                         }
7273                 }
7274                 if ($lastfile) {
7275                         print "</td></tr>\n";
7276                         if ($matches > 1000) {
7277                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7278                         }
7279                 } else {
7280                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7281                 }
7282                 close $fd;
7283
7284                 print "</table>\n";
7285         }
7286         git_footer_html();
7287 }
7288
7289 sub git_search_help {
7290         git_header_html();
7291         git_print_page_nav('','', $hash,$hash,$hash);
7292         print <<EOT;
7293 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7294 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7295 the pattern entered is recognized as the POSIX extended
7296 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7297 insensitive).</p>
7298 <dl>
7299 <dt><b>commit</b></dt>
7300 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7301 EOT
7302         my $have_grep = gitweb_check_feature('grep');
7303         if ($have_grep) {
7304                 print <<EOT;
7305 <dt><b>grep</b></dt>
7306 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7307     a different one) are searched for the given pattern. On large trees, this search can take
7308 a while and put some strain on the server, so please use it with some consideration. Note that
7309 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7310 case-sensitive.</dd>
7311 EOT
7312         }
7313         print <<EOT;
7314 <dt><b>author</b></dt>
7315 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7316 <dt><b>committer</b></dt>
7317 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7318 EOT
7319         my $have_pickaxe = gitweb_check_feature('pickaxe');
7320         if ($have_pickaxe) {
7321                 print <<EOT;
7322 <dt><b>pickaxe</b></dt>
7323 <dd>All commits that caused the string to appear or disappear from any file (changes that
7324 added, removed or "modified" the string) will be listed. This search can take a while and
7325 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7326 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7327 EOT
7328         }
7329         print "</dl>\n";
7330         git_footer_html();
7331 }
7332
7333 sub git_shortlog {
7334         git_log_generic('shortlog', \&git_shortlog_body,
7335                         $hash, $hash_parent);
7336 }
7337
7338 ## ......................................................................
7339 ## feeds (RSS, Atom; OPML)
7340
7341 sub git_feed {
7342         my $format = shift || 'atom';
7343         my $have_blame = gitweb_check_feature('blame');
7344
7345         # Atom: http://www.atomenabled.org/developers/syndication/
7346         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7347         if ($format ne 'rss' && $format ne 'atom') {
7348                 die_error(400, "Unknown web feed format");
7349         }
7350
7351         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7352         my $head = $hash || 'HEAD';
7353         my @commitlist = parse_commits($head, 150, 0, $file_name);
7354
7355         my %latest_commit;
7356         my %latest_date;
7357         my $content_type = "application/$format+xml";
7358         if (defined $cgi->http('HTTP_ACCEPT') &&
7359                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7360                 # browser (feed reader) prefers text/xml
7361                 $content_type = 'text/xml';
7362         }
7363         if (defined($commitlist[0])) {
7364                 %latest_commit = %{$commitlist[0]};
7365                 my $latest_epoch = $latest_commit{'committer_epoch'};
7366                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7367                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7368                 if (defined $if_modified) {
7369                         my $since;
7370                         if (eval { require HTTP::Date; 1; }) {
7371                                 $since = HTTP::Date::str2time($if_modified);
7372                         } elsif (eval { require Time::ParseDate; 1; }) {
7373                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7374                         }
7375                         if (defined $since && $latest_epoch <= $since) {
7376                                 print $cgi->header(
7377                                         -type => $content_type,
7378                                         -charset => 'utf-8',
7379                                         -last_modified => $latest_date{'rfc2822'},
7380                                         -status => '304 Not Modified');
7381                                 return;
7382                         }
7383                 }
7384                 print $cgi->header(
7385                         -type => $content_type,
7386                         -charset => 'utf-8',
7387                         -last_modified => $latest_date{'rfc2822'});
7388         } else {
7389                 print $cgi->header(
7390                         -type => $content_type,
7391                         -charset => 'utf-8');
7392         }
7393
7394         # Optimization: skip generating the body if client asks only
7395         # for Last-Modified date.
7396         return if ($cgi->request_method() eq 'HEAD');
7397
7398         # header variables
7399         my $title = "$site_name - $project/$action";
7400         my $feed_type = 'log';
7401         if (defined $hash) {
7402                 $title .= " - '$hash'";
7403                 $feed_type = 'branch log';
7404                 if (defined $file_name) {
7405                         $title .= " :: $file_name";
7406                         $feed_type = 'history';
7407                 }
7408         } elsif (defined $file_name) {
7409                 $title .= " - $file_name";
7410                 $feed_type = 'history';
7411         }
7412         $title .= " $feed_type";
7413         my $descr = git_get_project_description($project);
7414         if (defined $descr) {
7415                 $descr = esc_html($descr);
7416         } else {
7417                 $descr = "$project " .
7418                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7419                          " feed";
7420         }
7421         my $owner = git_get_project_owner($project);
7422         $owner = esc_html($owner);
7423
7424         #header
7425         my $alt_url;
7426         if (defined $file_name) {
7427                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7428         } elsif (defined $hash) {
7429                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7430         } else {
7431                 $alt_url = href(-full=>1, action=>"summary");
7432         }
7433         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7434         if ($format eq 'rss') {
7435                 print <<XML;
7436 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7437 <channel>
7438 XML
7439                 print "<title>$title</title>\n" .
7440                       "<link>$alt_url</link>\n" .
7441                       "<description>$descr</description>\n" .
7442                       "<language>en</language>\n" .
7443                       # project owner is responsible for 'editorial' content
7444                       "<managingEditor>$owner</managingEditor>\n";
7445                 if (defined $logo || defined $favicon) {
7446                         # prefer the logo to the favicon, since RSS
7447                         # doesn't allow both
7448                         my $img = esc_url($logo || $favicon);
7449                         print "<image>\n" .
7450                               "<url>$img</url>\n" .
7451                               "<title>$title</title>\n" .
7452                               "<link>$alt_url</link>\n" .
7453                               "</image>\n";
7454                 }
7455                 if (%latest_date) {
7456                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7457                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7458                 }
7459                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7460         } elsif ($format eq 'atom') {
7461                 print <<XML;
7462 <feed xmlns="http://www.w3.org/2005/Atom">
7463 XML
7464                 print "<title>$title</title>\n" .
7465                       "<subtitle>$descr</subtitle>\n" .
7466                       '<link rel="alternate" type="text/html" href="' .
7467                       $alt_url . '" />' . "\n" .
7468                       '<link rel="self" type="' . $content_type . '" href="' .
7469                       $cgi->self_url() . '" />' . "\n" .
7470                       "<id>" . href(-full=>1) . "</id>\n" .
7471                       # use project owner for feed author
7472                       "<author><name>$owner</name></author>\n";
7473                 if (defined $favicon) {
7474                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7475                 }
7476                 if (defined $logo) {
7477                         # not twice as wide as tall: 72 x 27 pixels
7478                         print "<logo>" . esc_url($logo) . "</logo>\n";
7479                 }
7480                 if (! %latest_date) {
7481                         # dummy date to keep the feed valid until commits trickle in:
7482                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7483                 } else {
7484                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7485                 }
7486                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7487         }
7488
7489         # contents
7490         for (my $i = 0; $i <= $#commitlist; $i++) {
7491                 my %co = %{$commitlist[$i]};
7492                 my $commit = $co{'id'};
7493                 # we read 150, we always show 30 and the ones more recent than 48 hours
7494                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7495                         last;
7496                 }
7497                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7498
7499                 # get list of changed files
7500                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7501                         $co{'parent'} || "--root",
7502                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7503                         or next;
7504                 my @difftree = map { chomp; $_ } <$fd>;
7505                 close $fd
7506                         or next;
7507
7508                 # print element (entry, item)
7509                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7510                 if ($format eq 'rss') {
7511                         print "<item>\n" .
7512                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7513                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7514                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7515                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7516                               "<link>$co_url</link>\n" .
7517                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7518                               "<content:encoded>" .
7519                               "<![CDATA[\n";
7520                 } elsif ($format eq 'atom') {
7521                         print "<entry>\n" .
7522                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7523                               "<updated>$cd{'iso-8601'}</updated>\n" .
7524                               "<author>\n" .
7525                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7526                         if ($co{'author_email'}) {
7527                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7528                         }
7529                         print "</author>\n" .
7530                               # use committer for contributor
7531                               "<contributor>\n" .
7532                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7533                         if ($co{'committer_email'}) {
7534                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7535                         }
7536                         print "</contributor>\n" .
7537                               "<published>$cd{'iso-8601'}</published>\n" .
7538                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7539                               "<id>$co_url</id>\n" .
7540                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7541                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7542                 }
7543                 my $comment = $co{'comment'};
7544                 print "<pre>\n";
7545                 foreach my $line (@$comment) {
7546                         $line = esc_html($line);
7547                         print "$line\n";
7548                 }
7549                 print "</pre><ul>\n";
7550                 foreach my $difftree_line (@difftree) {
7551                         my %difftree = parse_difftree_raw_line($difftree_line);
7552                         next if !$difftree{'from_id'};
7553
7554                         my $file = $difftree{'file'} || $difftree{'to_file'};
7555
7556                         print "<li>" .
7557                               "[" .
7558                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7559                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7560                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7561                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7562                                       -title => "diff"}, 'D');
7563                         if ($have_blame) {
7564                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7565                                                              file_name=>$file, hash_base=>$commit),
7566                                               -title => "blame"}, 'B');
7567                         }
7568                         # if this is not a feed of a file history
7569                         if (!defined $file_name || $file_name ne $file) {
7570                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7571                                                              file_name=>$file, hash=>$commit),
7572                                               -title => "history"}, 'H');
7573                         }
7574                         $file = esc_path($file);
7575                         print "] ".
7576                               "$file</li>\n";
7577                 }
7578                 if ($format eq 'rss') {
7579                         print "</ul>]]>\n" .
7580                               "</content:encoded>\n" .
7581                               "</item>\n";
7582                 } elsif ($format eq 'atom') {
7583                         print "</ul>\n</div>\n" .
7584                               "</content>\n" .
7585                               "</entry>\n";
7586                 }
7587         }
7588
7589         # end of feed
7590         if ($format eq 'rss') {
7591                 print "</channel>\n</rss>\n";
7592         } elsif ($format eq 'atom') {
7593                 print "</feed>\n";
7594         }
7595 }
7596
7597 sub git_rss {
7598         git_feed('rss');
7599 }
7600
7601 sub git_atom {
7602         git_feed('atom');
7603 }
7604
7605 sub git_opml {
7606         my @list = git_get_projects_list();
7607         if (!@list) {
7608                 die_error(404, "No projects found");
7609         }
7610
7611         print $cgi->header(
7612                 -type => 'text/xml',
7613                 -charset => 'utf-8',
7614                 -content_disposition => 'inline; filename="opml.xml"');
7615
7616         print <<XML;
7617 <?xml version="1.0" encoding="utf-8"?>
7618 <opml version="1.0">
7619 <head>
7620   <title>$site_name OPML Export</title>
7621 </head>
7622 <body>
7623 <outline text="git RSS feeds">
7624 XML
7625
7626         foreach my $pr (@list) {
7627                 my %proj = %$pr;
7628                 my $head = git_get_head_hash($proj{'path'});
7629                 if (!defined $head) {
7630                         next;
7631                 }
7632                 $git_dir = "$projectroot/$proj{'path'}";
7633                 my %co = parse_commit($head);
7634                 if (!%co) {
7635                         next;
7636                 }
7637
7638                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7639                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7640                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7641                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7642         }
7643         print <<XML;
7644 </outline>
7645 </body>
7646 </opml>
7647 XML
7648 }