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
 332         # To enable system wide have in $GITWEB_CONFIG
 333         # $feature{'grep'}{'default'} = [1];
 334         # To have project specific config enable override in $GITWEB_CONFIG
 335         # $feature{'grep'}{'override'} = 1;
 336         # and in project config gitweb.grep = 0|1;
 337         'grep' => {
 338                 'sub' => sub { feature_bool('grep', @_) },
 339                 'override' => 0,
 340                 'default' => [1]},
 341
 342         # Enable the pickaxe search, which will list the commits that modified
 343         # a given string in a file. This can be practical and quite faster
 344         # alternative to 'blame', but still potentially CPU-intensive.
 345
 346         # To enable system wide have in $GITWEB_CONFIG
 347         # $feature{'pickaxe'}{'default'} = [1];
 348         # To have project specific config enable override in $GITWEB_CONFIG
 349         # $feature{'pickaxe'}{'override'} = 1;
 350         # and in project config gitweb.pickaxe = 0|1;
 351         'pickaxe' => {
 352                 'sub' => sub { feature_bool('pickaxe', @_) },
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Enable showing size of blobs in a 'tree' view, in a separate
 357         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 358
 359         # To disable system wide have in $GITWEB_CONFIG
 360         # $feature{'show-sizes'}{'default'} = [0];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'show-sizes'}{'override'} = 1;
 363         # and in project config gitweb.showsizes = 0|1;
 364         'show-sizes' => {
 365                 'sub' => sub { feature_bool('showsizes', @_) },
 366                 'override' => 0,
 367                 'default' => [1]},
 368
 369         # Make gitweb use an alternative format of the URLs which can be
 370         # more readable and natural-looking: project name is embedded
 371         # directly in the path and the query string contains other
 372         # auxiliary information. All gitweb installations recognize
 373         # URL in either format; this configures in which formats gitweb
 374         # generates links.
 375
 376         # To enable system wide have in $GITWEB_CONFIG
 377         # $feature{'pathinfo'}{'default'} = [1];
 378         # Project specific override is not supported.
 379
 380         # Note that you will need to change the default location of CSS,
 381         # favicon, logo and possibly other files to an absolute URL. Also,
 382         # if gitweb.cgi serves as your indexfile, you will need to force
 383         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 384         'pathinfo' => {
 385                 'override' => 0,
 386                 'default' => [0]},
 387
 388         # Make gitweb consider projects in project root subdirectories
 389         # to be forks of existing projects. Given project $projname.git,
 390         # projects matching $projname/*.git will not be shown in the main
 391         # projects list, instead a '+' mark will be added to $projname
 392         # there and a 'forks' view will be enabled for the project, listing
 393         # all the forks. If project list is taken from a file, forks have
 394         # to be listed after the main project.
 395
 396         # To enable system wide have in $GITWEB_CONFIG
 397         # $feature{'forks'}{'default'} = [1];
 398         # Project specific override is not supported.
 399         'forks' => {
 400                 'override' => 0,
 401                 'default' => [0]},
 402
 403         # Insert custom links to the action bar of all project pages.
 404         # This enables you mainly to link to third-party scripts integrating
 405         # into gitweb; e.g. git-browser for graphical history representation
 406         # or custom web-based repository administration interface.
 407
 408         # The 'default' value consists of a list of triplets in the form
 409         # (label, link, position) where position is the label after which
 410         # to insert the link and link is a format string where %n expands
 411         # to the project name, %f to the project path within the filesystem,
 412         # %h to the current hash (h gitweb parameter) and %b to the current
 413         # hash base (hb gitweb parameter); %% expands to %.
 414
 415         # To enable system wide have in $GITWEB_CONFIG e.g.
 416         # $feature{'actions'}{'default'} = [('graphiclog',
 417         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 418         # Project specific override is not supported.
 419         'actions' => {
 420                 'override' => 0,
 421                 'default' => []},
 422
 423         # Allow gitweb scan project content tags of project repository,
 424         # and display the popular Web 2.0-ish "tag cloud" near the projects
 425         # list.  Note that this is something COMPLETELY different from the
 426         # normal Git tags.
 427
 428         # gitweb by itself can show existing tags, but it does not handle
 429         # tagging itself; you need to do it externally, outside gitweb.
 430         # The format is described in git_get_project_ctags() subroutine.
 431         # You may want to install the HTML::TagCloud Perl module to get
 432         # a pretty tag cloud instead of just a list of tags.
 433
 434         # To enable system wide have in $GITWEB_CONFIG
 435         # $feature{'ctags'}{'default'} = [1];
 436         # Project specific override is not supported.
 437
 438         # In the future whether ctags editing is enabled might depend
 439         # on the value, but using 1 should always mean no editing of ctags.
 440         'ctags' => {
 441                 'override' => 0,
 442                 'default' => [0]},
 443
 444         # The maximum number of patches in a patchset generated in patch
 445         # view. Set this to 0 or undef to disable patch view, or to a
 446         # negative number to remove any limit.
 447
 448         # To disable system wide have in $GITWEB_CONFIG
 449         # $feature{'patches'}{'default'} = [0];
 450         # To have project specific config enable override in $GITWEB_CONFIG
 451         # $feature{'patches'}{'override'} = 1;
 452         # and in project config gitweb.patches = 0|n;
 453         # where n is the maximum number of patches allowed in a patchset.
 454         'patches' => {
 455                 'sub' => \&feature_patches,
 456                 'override' => 0,
 457                 'default' => [16]},
 458
 459         # Avatar support. When this feature is enabled, views such as
 460         # shortlog or commit will display an avatar associated with
 461         # the email of the committer(s) and/or author(s).
 462
 463         # Currently available providers are gravatar and picon.
 464         # If an unknown provider is specified, the feature is disabled.
 465
 466         # Gravatar depends on Digest::MD5.
 467         # Picon currently relies on the indiana.edu database.
 468
 469         # To enable system wide have in $GITWEB_CONFIG
 470         # $feature{'avatar'}{'default'} = ['<provider>'];
 471         # where <provider> is either gravatar or picon.
 472         # To have project specific config enable override in $GITWEB_CONFIG
 473         # $feature{'avatar'}{'override'} = 1;
 474         # and in project config gitweb.avatar = <provider>;
 475         'avatar' => {
 476                 'sub' => \&feature_avatar,
 477                 'override' => 0,
 478                 'default' => ['']},
 479
 480         # Enable displaying how much time and how many git commands
 481         # it took to generate and display page.  Disabled by default.
 482         # Project specific override is not supported.
 483         'timed' => {
 484                 'override' => 0,
 485                 'default' => [0]},
 486
 487         # Enable turning some links into links to actions which require
 488         # JavaScript to run (like 'blame_incremental').  Not enabled by
 489         # default.  Project specific override is currently not supported.
 490         'javascript-actions' => {
 491                 'override' => 0,
 492                 'default' => [0]},
 493
 494         # Enable and configure ability to change common timezone for dates
 495         # in gitweb output via JavaScript.  Enabled by default.
 496         # Project specific override is not supported.
 497         'javascript-timezone' => {
 498                 'override' => 0,
 499                 'default' => [
 500                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 501                                      # or undef to turn off this feature
 502                         'gitweb_tz', # name of cookie where to store selected timezone
 503                         'datetime',  # CSS class used to mark up dates for manipulation
 504                 ]},
 505
 506         # Syntax highlighting support. This is based on Daniel Svensson's
 507         # and Sham Chukoury's work in gitweb-xmms2.git.
 508         # It requires the 'highlight' program present in $PATH,
 509         # and therefore is disabled by default.
 510
 511         # To enable system wide have in $GITWEB_CONFIG
 512         # $feature{'highlight'}{'default'} = [1];
 513
 514         'highlight' => {
 515                 'sub' => sub { feature_bool('highlight', @_) },
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Enable displaying of remote heads in the heads list
 520
 521         # To enable system wide have in $GITWEB_CONFIG
 522         # $feature{'remote_heads'}{'default'} = [1];
 523         # To have project specific config enable override in $GITWEB_CONFIG
 524         # $feature{'remote_heads'}{'override'} = 1;
 525         # and in project config gitweb.remote_heads = 0|1;
 526         'remote_heads' => {
 527                 'sub' => sub { feature_bool('remote_heads', @_) },
 528                 'override' => 0,
 529                 'default' => [0]},
 530 );
 531
 532 sub gitweb_get_feature {
 533         my ($name) = @_;
 534         return unless exists $feature{$name};
 535         my ($sub, $override, @defaults) = (
 536                 $feature{$name}{'sub'},
 537                 $feature{$name}{'override'},
 538                 @{$feature{$name}{'default'}});
 539         # project specific override is possible only if we have project
 540         our $git_dir; # global variable, declared later
 541         if (!$override || !defined $git_dir) {
 542                 return @defaults;
 543         }
 544         if (!defined $sub) {
 545                 warn "feature $name is not overridable";
 546                 return @defaults;
 547         }
 548         return $sub->(@defaults);
 549 }
 550
 551 # A wrapper to check if a given feature is enabled.
 552 # With this, you can say
 553 #
 554 #   my $bool_feat = gitweb_check_feature('bool_feat');
 555 #   gitweb_check_feature('bool_feat') or somecode;
 556 #
 557 # instead of
 558 #
 559 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 560 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 561 #
 562 sub gitweb_check_feature {
 563         return (gitweb_get_feature(@_))[0];
 564 }
 565
 566
 567 sub feature_bool {
 568         my $key = shift;
 569         my ($val) = git_get_project_config($key, '--bool');
 570
 571         if (!defined $val) {
 572                 return ($_[0]);
 573         } elsif ($val eq 'true') {
 574                 return (1);
 575         } elsif ($val eq 'false') {
 576                 return (0);
 577         }
 578 }
 579
 580 sub feature_snapshot {
 581         my (@fmts) = @_;
 582
 583         my ($val) = git_get_project_config('snapshot');
 584
 585         if ($val) {
 586                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 587         }
 588
 589         return @fmts;
 590 }
 591
 592 sub feature_patches {
 593         my @val = (git_get_project_config('patches', '--int'));
 594
 595         if (@val) {
 596                 return @val;
 597         }
 598
 599         return ($_[0]);
 600 }
 601
 602 sub feature_avatar {
 603         my @val = (git_get_project_config('avatar'));
 604
 605         return @val ? @val : @_;
 606 }
 607
 608 # checking HEAD file with -e is fragile if the repository was
 609 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 610 # and then pruned.
 611 sub check_head_link {
 612         my ($dir) = @_;
 613         my $headfile = "$dir/HEAD";
 614         return ((-e $headfile) ||
 615                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 616 }
 617
 618 sub check_export_ok {
 619         my ($dir) = @_;
 620         return (check_head_link($dir) &&
 621                 (!$export_ok || -e "$dir/$export_ok") &&
 622                 (!$export_auth_hook || $export_auth_hook->($dir)));
 623 }
 624
 625 # process alternate names for backward compatibility
 626 # filter out unsupported (unknown) snapshot formats
 627 sub filter_snapshot_fmts {
 628         my @fmts = @_;
 629
 630         @fmts = map {
 631                 exists $known_snapshot_format_aliases{$_} ?
 632                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 633         @fmts = grep {
 634                 exists $known_snapshot_formats{$_} &&
 635                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 636 }
 637
 638 # If it is set to code reference, it is code that it is to be run once per
 639 # request, allowing updating configurations that change with each request,
 640 # while running other code in config file only once.
 641 #
 642 # Otherwise, if it is false then gitweb would process config file only once;
 643 # if it is true then gitweb config would be run for each request.
 644 our $per_request_config = 1;
 645
 646 # read and parse gitweb config file given by its parameter.
 647 # returns true on success, false on recoverable error, allowing
 648 # to chain this subroutine, using first file that exists.
 649 # dies on errors during parsing config file, as it is unrecoverable.
 650 sub read_config_file {
 651         my $filename = shift;
 652         return unless defined $filename;
 653         # die if there are errors parsing config file
 654         if (-e $filename) {
 655                 do $filename;
 656                 die $@ if $@;
 657                 return 1;
 658         }
 659         return;
 660 }
 661
 662 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 663 sub evaluate_gitweb_config {
 664         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 665         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 666
 667         # use first config file that exists
 668         read_config_file($GITWEB_CONFIG) or
 669         read_config_file($GITWEB_CONFIG_SYSTEM);
 670 }
 671
 672 # Get loadavg of system, to compare against $maxload.
 673 # Currently it requires '/proc/loadavg' present to get loadavg;
 674 # if it is not present it returns 0, which means no load checking.
 675 sub get_loadavg {
 676         if( -e '/proc/loadavg' ){
 677                 open my $fd, '<', '/proc/loadavg'
 678                         or return 0;
 679                 my @load = split(/\s+/, scalar <$fd>);
 680                 close $fd;
 681
 682                 # The first three columns measure CPU and IO utilization of the last one,
 683                 # five, and 10 minute periods.  The fourth column shows the number of
 684                 # currently running processes and the total number of processes in the m/n
 685                 # format.  The last column displays the last process ID used.
 686                 return $load[0] || 0;
 687         }
 688         # additional checks for load average should go here for things that don't export
 689         # /proc/loadavg
 690
 691         return 0;
 692 }
 693
 694 # version of the core git binary
 695 our $git_version;
 696 sub evaluate_git_version {
 697         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 698         $number_of_git_cmds++;
 699 }
 700
 701 sub check_loadavg {
 702         if (defined $maxload && get_loadavg() > $maxload) {
 703                 die_error(503, "The load average on the server is too high");
 704         }
 705 }
 706
 707 # ======================================================================
 708 # input validation and dispatch
 709
 710 # input parameters can be collected from a variety of sources (presently, CGI
 711 # and PATH_INFO), so we define an %input_params hash that collects them all
 712 # together during validation: this allows subsequent uses (e.g. href()) to be
 713 # agnostic of the parameter origin
 714
 715 our %input_params = ();
 716
 717 # input parameters are stored with the long parameter name as key. This will
 718 # also be used in the href subroutine to convert parameters to their CGI
 719 # equivalent, and since the href() usage is the most frequent one, we store
 720 # the name -> CGI key mapping here, instead of the reverse.
 721 #
 722 # XXX: Warning: If you touch this, check the search form for updating,
 723 # too.
 724
 725 our @cgi_param_mapping = (
 726         project => "p",
 727         action => "a",
 728         file_name => "f",
 729         file_parent => "fp",
 730         hash => "h",
 731         hash_parent => "hp",
 732         hash_base => "hb",
 733         hash_parent_base => "hpb",
 734         page => "pg",
 735         order => "o",
 736         searchtext => "s",
 737         searchtype => "st",
 738         snapshot_format => "sf",
 739         extra_options => "opt",
 740         search_use_regexp => "sr",
 741         ctag => "by_tag",
 742         # this must be last entry (for manipulation from JavaScript)
 743         javascript => "js"
 744 );
 745 our %cgi_param_mapping = @cgi_param_mapping;
 746
 747 # we will also need to know the possible actions, for validation
 748 our %actions = (
 749         "blame" => \&git_blame,
 750         "blame_incremental" => \&git_blame_incremental,
 751         "blame_data" => \&git_blame_data,
 752         "blobdiff" => \&git_blobdiff,
 753         "blobdiff_plain" => \&git_blobdiff_plain,
 754         "blob" => \&git_blob,
 755         "blob_plain" => \&git_blob_plain,
 756         "commitdiff" => \&git_commitdiff,
 757         "commitdiff_plain" => \&git_commitdiff_plain,
 758         "commit" => \&git_commit,
 759         "forks" => \&git_forks,
 760         "heads" => \&git_heads,
 761         "history" => \&git_history,
 762         "log" => \&git_log,
 763         "patch" => \&git_patch,
 764         "patches" => \&git_patches,
 765         "remotes" => \&git_remotes,
 766         "rss" => \&git_rss,
 767         "atom" => \&git_atom,
 768         "search" => \&git_search,
 769         "search_help" => \&git_search_help,
 770         "shortlog" => \&git_shortlog,
 771         "summary" => \&git_summary,
 772         "tag" => \&git_tag,
 773         "tags" => \&git_tags,
 774         "tree" => \&git_tree,
 775         "snapshot" => \&git_snapshot,
 776         "object" => \&git_object,
 777         # those below don't need $project
 778         "opml" => \&git_opml,
 779         "project_list" => \&git_project_list,
 780         "project_index" => \&git_project_index,
 781 );
 782
 783 # finally, we have the hash of allowed extra_options for the commands that
 784 # allow them
 785 our %allowed_options = (
 786         "--no-merges" => [ qw(rss atom log shortlog history) ],
 787 );
 788
 789 # fill %input_params with the CGI parameters. All values except for 'opt'
 790 # should be single values, but opt can be an array. We should probably
 791 # build an array of parameters that can be multi-valued, but since for the time
 792 # being it's only this one, we just single it out
 793 sub evaluate_query_params {
 794         our $cgi;
 795
 796         while (my ($name, $symbol) = each %cgi_param_mapping) {
 797                 if ($symbol eq 'opt') {
 798                         $input_params{$name} = [ $cgi->param($symbol) ];
 799                 } else {
 800                         $input_params{$name} = $cgi->param($symbol);
 801                 }
 802         }
 803 }
 804
 805 # now read PATH_INFO and update the parameter list for missing parameters
 806 sub evaluate_path_info {
 807         return if defined $input_params{'project'};
 808         return if !$path_info;
 809         $path_info =~ s,^/+,,;
 810         return if !$path_info;
 811
 812         # find which part of PATH_INFO is project
 813         my $project = $path_info;
 814         $project =~ s,/+$,,;
 815         while ($project && !check_head_link("$projectroot/$project")) {
 816                 $project =~ s,/*[^/]*$,,;
 817         }
 818         return unless $project;
 819         $input_params{'project'} = $project;
 820
 821         # do not change any parameters if an action is given using the query string
 822         return if $input_params{'action'};
 823         $path_info =~ s,^\Q$project\E/*,,;
 824
 825         # next, check if we have an action
 826         my $action = $path_info;
 827         $action =~ s,/.*$,,;
 828         if (exists $actions{$action}) {
 829                 $path_info =~ s,^$action/*,,;
 830                 $input_params{'action'} = $action;
 831         }
 832
 833         # list of actions that want hash_base instead of hash, but can have no
 834         # pathname (f) parameter
 835         my @wants_base = (
 836                 'tree',
 837                 'history',
 838         );
 839
 840         # we want to catch, among others
 841         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 842         my ($parentrefname, $parentpathname, $refname, $pathname) =
 843                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 844
 845         # first, analyze the 'current' part
 846         if (defined $pathname) {
 847                 # we got "branch:filename" or "branch:dir/"
 848                 # we could use git_get_type(branch:pathname), but:
 849                 # - it needs $git_dir
 850                 # - it does a git() call
 851                 # - the convention of terminating directories with a slash
 852                 #   makes it superfluous
 853                 # - embedding the action in the PATH_INFO would make it even
 854                 #   more superfluous
 855                 $pathname =~ s,^/+,,;
 856                 if (!$pathname || substr($pathname, -1) eq "/") {
 857                         $input_params{'action'} ||= "tree";
 858                         $pathname =~ s,/$,,;
 859                 } else {
 860                         # the default action depends on whether we had parent info
 861                         # or not
 862                         if ($parentrefname) {
 863                                 $input_params{'action'} ||= "blobdiff_plain";
 864                         } else {
 865                                 $input_params{'action'} ||= "blob_plain";
 866                         }
 867                 }
 868                 $input_params{'hash_base'} ||= $refname;
 869                 $input_params{'file_name'} ||= $pathname;
 870         } elsif (defined $refname) {
 871                 # we got "branch". In this case we have to choose if we have to
 872                 # set hash or hash_base.
 873                 #
 874                 # Most of the actions without a pathname only want hash to be
 875                 # set, except for the ones specified in @wants_base that want
 876                 # hash_base instead. It should also be noted that hand-crafted
 877                 # links having 'history' as an action and no pathname or hash
 878                 # set will fail, but that happens regardless of PATH_INFO.
 879                 if (defined $parentrefname) {
 880                         # if there is parent let the default be 'shortlog' action
 881                         # (for http://git.example.com/repo.git/A..B links); if there
 882                         # is no parent, dispatch will detect type of object and set
 883                         # action appropriately if required (if action is not set)
 884                         $input_params{'action'} ||= "shortlog";
 885                 }
 886                 if ($input_params{'action'} &&
 887                     grep { $_ eq $input_params{'action'} } @wants_base) {
 888                         $input_params{'hash_base'} ||= $refname;
 889                 } else {
 890                         $input_params{'hash'} ||= $refname;
 891                 }
 892         }
 893
 894         # next, handle the 'parent' part, if present
 895         if (defined $parentrefname) {
 896                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 897                 # someproject/blobdiff/oldrev..newrev:/filename
 898                 if ($parentpathname) {
 899                         $parentpathname =~ s,^/+,,;
 900                         $parentpathname =~ s,/$,,;
 901                         $input_params{'file_parent'} ||= $parentpathname;
 902                 } else {
 903                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 904                 }
 905                 # we assume that hash_parent_base is wanted if a path was specified,
 906                 # or if the action wants hash_base instead of hash
 907                 if (defined $input_params{'file_parent'} ||
 908                         grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_parent_base'} ||= $parentrefname;
 910                 } else {
 911                         $input_params{'hash_parent'} ||= $parentrefname;
 912                 }
 913         }
 914
 915         # for the snapshot action, we allow URLs in the form
 916         # $project/snapshot/$hash.ext
 917         # where .ext determines the snapshot and gets removed from the
 918         # passed $refname to provide the $hash.
 919         #
 920         # To be able to tell that $refname includes the format extension, we
 921         # require the following two conditions to be satisfied:
 922         # - the hash input parameter MUST have been set from the $refname part
 923         #   of the URL (i.e. they must be equal)
 924         # - the snapshot format MUST NOT have been defined already (e.g. from
 925         #   CGI parameter sf)
 926         # It's also useless to try any matching unless $refname has a dot,
 927         # so we check for that too
 928         if (defined $input_params{'action'} &&
 929                 $input_params{'action'} eq 'snapshot' &&
 930                 defined $refname && index($refname, '.') != -1 &&
 931                 $refname eq $input_params{'hash'} &&
 932                 !defined $input_params{'snapshot_format'}) {
 933                 # We loop over the known snapshot formats, checking for
 934                 # extensions. Allowed extensions are both the defined suffix
 935                 # (which includes the initial dot already) and the snapshot
 936                 # format key itself, with a prepended dot
 937                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 938                         my $hash = $refname;
 939                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 940                                 next;
 941                         }
 942                         my $sfx = $1;
 943                         # a valid suffix was found, so set the snapshot format
 944                         # and reset the hash parameter
 945                         $input_params{'snapshot_format'} = $fmt;
 946                         $input_params{'hash'} = $hash;
 947                         # we also set the format suffix to the one requested
 948                         # in the URL: this way a request for e.g. .tgz returns
 949                         # a .tgz instead of a .tar.gz
 950                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 951                         last;
 952                 }
 953         }
 954 }
 955
 956 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 957      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 958      $searchtext, $search_regexp);
 959 sub evaluate_and_validate_params {
 960         our $action = $input_params{'action'};
 961         if (defined $action) {
 962                 if (!validate_action($action)) {
 963                         die_error(400, "Invalid action parameter");
 964                 }
 965         }
 966
 967         # parameters which are pathnames
 968         our $project = $input_params{'project'};
 969         if (defined $project) {
 970                 if (!validate_project($project)) {
 971                         undef $project;
 972                         die_error(404, "No such project");
 973                 }
 974         }
 975
 976         our $file_name = $input_params{'file_name'};
 977         if (defined $file_name) {
 978                 if (!validate_pathname($file_name)) {
 979                         die_error(400, "Invalid file parameter");
 980                 }
 981         }
 982
 983         our $file_parent = $input_params{'file_parent'};
 984         if (defined $file_parent) {
 985                 if (!validate_pathname($file_parent)) {
 986                         die_error(400, "Invalid file parent parameter");
 987                 }
 988         }
 989
 990         # parameters which are refnames
 991         our $hash = $input_params{'hash'};
 992         if (defined $hash) {
 993                 if (!validate_refname($hash)) {
 994                         die_error(400, "Invalid hash parameter");
 995                 }
 996         }
 997
 998         our $hash_parent = $input_params{'hash_parent'};
 999         if (defined $hash_parent) {
1000                 if (!validate_refname($hash_parent)) {
1001                         die_error(400, "Invalid hash parent parameter");
1002                 }
1003         }
1004
1005         our $hash_base = $input_params{'hash_base'};
1006         if (defined $hash_base) {
1007                 if (!validate_refname($hash_base)) {
1008                         die_error(400, "Invalid hash base parameter");
1009                 }
1010         }
1011
1012         our @extra_options = @{$input_params{'extra_options'}};
1013         # @extra_options is always defined, since it can only be (currently) set from
1014         # CGI, and $cgi->param() returns the empty array in array context if the param
1015         # is not set
1016         foreach my $opt (@extra_options) {
1017                 if (not exists $allowed_options{$opt}) {
1018                         die_error(400, "Invalid option parameter");
1019                 }
1020                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1021                         die_error(400, "Invalid option parameter for this action");
1022                 }
1023         }
1024
1025         our $hash_parent_base = $input_params{'hash_parent_base'};
1026         if (defined $hash_parent_base) {
1027                 if (!validate_refname($hash_parent_base)) {
1028                         die_error(400, "Invalid hash parent base parameter");
1029                 }
1030         }
1031
1032         # other parameters
1033         our $page = $input_params{'page'};
1034         if (defined $page) {
1035                 if ($page =~ m/[^0-9]/) {
1036                         die_error(400, "Invalid page parameter");
1037                 }
1038         }
1039
1040         our $searchtype = $input_params{'searchtype'};
1041         if (defined $searchtype) {
1042                 if ($searchtype =~ m/[^a-z]/) {
1043                         die_error(400, "Invalid searchtype parameter");
1044                 }
1045         }
1046
1047         our $search_use_regexp = $input_params{'search_use_regexp'};
1048
1049         our $searchtext = $input_params{'searchtext'};
1050         our $search_regexp;
1051         if (defined $searchtext) {
1052                 if (length($searchtext) < 2) {
1053                         die_error(403, "At least two characters are required for search parameter");
1054                 }
1055                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1056         }
1057 }
1058
1059 # path to the current git repository
1060 our $git_dir;
1061 sub evaluate_git_dir {
1062         our $git_dir = "$projectroot/$project" if $project;
1063 }
1064
1065 our (@snapshot_fmts, $git_avatar);
1066 sub configure_gitweb_features {
1067         # list of supported snapshot formats
1068         our @snapshot_fmts = gitweb_get_feature('snapshot');
1069         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1070
1071         # check that the avatar feature is set to a known provider name,
1072         # and for each provider check if the dependencies are satisfied.
1073         # if the provider name is invalid or the dependencies are not met,
1074         # reset $git_avatar to the empty string.
1075         our ($git_avatar) = gitweb_get_feature('avatar');
1076         if ($git_avatar eq 'gravatar') {
1077                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1078         } elsif ($git_avatar eq 'picon') {
1079                 # no dependencies
1080         } else {
1081                 $git_avatar = '';
1082         }
1083 }
1084
1085 # custom error handler: 'die <message>' is Internal Server Error
1086 sub handle_errors_html {
1087         my $msg = shift; # it is already HTML escaped
1088
1089         # to avoid infinite loop where error occurs in die_error,
1090         # change handler to default handler, disabling handle_errors_html
1091         set_message("Error occured when inside die_error:\n$msg");
1092
1093         # you cannot jump out of die_error when called as error handler;
1094         # the subroutine set via CGI::Carp::set_message is called _after_
1095         # HTTP headers are already written, so it cannot write them itself
1096         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1097 }
1098 set_message(\&handle_errors_html);
1099
1100 # dispatch
1101 sub dispatch {
1102         if (!defined $action) {
1103                 if (defined $hash) {
1104                         $action = git_get_type($hash);
1105                 } elsif (defined $hash_base && defined $file_name) {
1106                         $action = git_get_type("$hash_base:$file_name");
1107                 } elsif (defined $project) {
1108                         $action = 'summary';
1109                 } else {
1110                         $action = 'project_list';
1111                 }
1112         }
1113         if (!defined($actions{$action})) {
1114                 die_error(400, "Unknown action");
1115         }
1116         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1117             !$project) {
1118                 die_error(400, "Project needed");
1119         }
1120         $actions{$action}->();
1121 }
1122
1123 sub reset_timer {
1124         our $t0 = [ gettimeofday() ]
1125                 if defined $t0;
1126         our $number_of_git_cmds = 0;
1127 }
1128
1129 our $first_request = 1;
1130 sub run_request {
1131         reset_timer();
1132
1133         evaluate_uri();
1134         if ($first_request) {
1135                 evaluate_gitweb_config();
1136                 evaluate_git_version();
1137         }
1138         if ($per_request_config) {
1139                 if (ref($per_request_config) eq 'CODE') {
1140                         $per_request_config->();
1141                 } elsif (!$first_request) {
1142                         evaluate_gitweb_config();
1143                 }
1144         }
1145         check_loadavg();
1146
1147         # $projectroot and $projects_list might be set in gitweb config file
1148         $projects_list ||= $projectroot;
1149
1150         evaluate_query_params();
1151         evaluate_path_info();
1152         evaluate_and_validate_params();
1153         evaluate_git_dir();
1154
1155         configure_gitweb_features();
1156
1157         dispatch();
1158 }
1159
1160 our $is_last_request = sub { 1 };
1161 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1162 our $CGI = 'CGI';
1163 our $cgi;
1164 sub configure_as_fcgi {
1165         require CGI::Fast;
1166         our $CGI = 'CGI::Fast';
1167
1168         my $request_number = 0;
1169         # let each child service 100 requests
1170         our $is_last_request = sub { ++$request_number > 100 };
1171 }
1172 sub evaluate_argv {
1173         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1174         configure_as_fcgi()
1175                 if $script_name =~ /\.fcgi$/;
1176
1177         return unless (@ARGV);
1178
1179         require Getopt::Long;
1180         Getopt::Long::GetOptions(
1181                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1182                 'nproc|n=i' => sub {
1183                         my ($arg, $val) = @_;
1184                         return unless eval { require FCGI::ProcManager; 1; };
1185                         my $proc_manager = FCGI::ProcManager->new({
1186                                 n_processes => $val,
1187                         });
1188                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1189                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1190                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1191                 },
1192         );
1193 }
1194
1195 sub run {
1196         evaluate_argv();
1197
1198         $first_request = 1;
1199         $pre_listen_hook->()
1200                 if $pre_listen_hook;
1201
1202  REQUEST:
1203         while ($cgi = $CGI->new()) {
1204                 $pre_dispatch_hook->()
1205                         if $pre_dispatch_hook;
1206
1207                 run_request();
1208
1209                 $post_dispatch_hook->()
1210                         if $post_dispatch_hook;
1211                 $first_request = 0;
1212
1213                 last REQUEST if ($is_last_request->());
1214         }
1215
1216  DONE_GITWEB:
1217         1;
1218 }
1219
1220 run();
1221
1222 if (defined caller) {
1223         # wrapped in a subroutine processing requests,
1224         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1225         return;
1226 } else {
1227         # pure CGI script, serving single request
1228         exit;
1229 }
1230
1231 ## ======================================================================
1232 ## action links
1233
1234 # possible values of extra options
1235 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1236 # -replay => 1      - start from a current view (replay with modifications)
1237 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1238 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1239 sub href {
1240         my %params = @_;
1241         # default is to use -absolute url() i.e. $my_uri
1242         my $href = $params{-full} ? $my_url : $my_uri;
1243
1244         # implicit -replay, must be first of implicit params
1245         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1246
1247         $params{'project'} = $project unless exists $params{'project'};
1248
1249         if ($params{-replay}) {
1250                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1251                         if (!exists $params{$name}) {
1252                                 $params{$name} = $input_params{$name};
1253                         }
1254                 }
1255         }
1256
1257         my $use_pathinfo = gitweb_check_feature('pathinfo');
1258         if (defined $params{'project'} &&
1259             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1260                 # try to put as many parameters as possible in PATH_INFO:
1261                 #   - project name
1262                 #   - action
1263                 #   - hash_parent or hash_parent_base:/file_parent
1264                 #   - hash or hash_base:/filename
1265                 #   - the snapshot_format as an appropriate suffix
1266
1267                 # When the script is the root DirectoryIndex for the domain,
1268                 # $href here would be something like http://gitweb.example.com/
1269                 # Thus, we strip any trailing / from $href, to spare us double
1270                 # slashes in the final URL
1271                 $href =~ s,/$,,;
1272
1273                 # Then add the project name, if present
1274                 $href .= "/".esc_path_info($params{'project'});
1275                 delete $params{'project'};
1276
1277                 # since we destructively absorb parameters, we keep this
1278                 # boolean that remembers if we're handling a snapshot
1279                 my $is_snapshot = $params{'action'} eq 'snapshot';
1280
1281                 # Summary just uses the project path URL, any other action is
1282                 # added to the URL
1283                 if (defined $params{'action'}) {
1284                         $href .= "/".esc_path_info($params{'action'})
1285                                 unless $params{'action'} eq 'summary';
1286                         delete $params{'action'};
1287                 }
1288
1289                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1290                 # stripping nonexistent or useless pieces
1291                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1292                         || $params{'hash_parent'} || $params{'hash'});
1293                 if (defined $params{'hash_base'}) {
1294                         if (defined $params{'hash_parent_base'}) {
1295                                 $href .= esc_path_info($params{'hash_parent_base'});
1296                                 # skip the file_parent if it's the same as the file_name
1297                                 if (defined $params{'file_parent'}) {
1298                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1299                                                 delete $params{'file_parent'};
1300                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1301                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1302                                                 delete $params{'file_parent'};
1303                                         }
1304                                 }
1305                                 $href .= "..";
1306                                 delete $params{'hash_parent'};
1307                                 delete $params{'hash_parent_base'};
1308                         } elsif (defined $params{'hash_parent'}) {
1309                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1310                                 delete $params{'hash_parent'};
1311                         }
1312
1313                         $href .= esc_path_info($params{'hash_base'});
1314                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1315                                 $href .= ":/".esc_path_info($params{'file_name'});
1316                                 delete $params{'file_name'};
1317                         }
1318                         delete $params{'hash'};
1319                         delete $params{'hash_base'};
1320                 } elsif (defined $params{'hash'}) {
1321                         $href .= esc_path_info($params{'hash'});
1322                         delete $params{'hash'};
1323                 }
1324
1325                 # If the action was a snapshot, we can absorb the
1326                 # snapshot_format parameter too
1327                 if ($is_snapshot) {
1328                         my $fmt = $params{'snapshot_format'};
1329                         # snapshot_format should always be defined when href()
1330                         # is called, but just in case some code forgets, we
1331                         # fall back to the default
1332                         $fmt ||= $snapshot_fmts[0];
1333                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1334                         delete $params{'snapshot_format'};
1335                 }
1336         }
1337
1338         # now encode the parameters explicitly
1339         my @result = ();
1340         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1341                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1342                 if (defined $params{$name}) {
1343                         if (ref($params{$name}) eq "ARRAY") {
1344                                 foreach my $par (@{$params{$name}}) {
1345                                         push @result, $symbol . "=" . esc_param($par);
1346                                 }
1347                         } else {
1348                                 push @result, $symbol . "=" . esc_param($params{$name});
1349                         }
1350                 }
1351         }
1352         $href .= "?" . join(';', @result) if scalar @result;
1353
1354         # final transformation: trailing spaces must be escaped (URI-encoded)
1355         $href =~ s/(\s+)$/CGI::escape($1)/e;
1356
1357         if ($params{-anchor}) {
1358                 $href .= "#".esc_param($params{-anchor});
1359         }
1360
1361         return $href;
1362 }
1363
1364
1365 ## ======================================================================
1366 ## validation, quoting/unquoting and escaping
1367
1368 sub validate_action {
1369         my $input = shift || return undef;
1370         return undef unless exists $actions{$input};
1371         return $input;
1372 }
1373
1374 sub validate_project {
1375         my $input = shift || return undef;
1376         if (!validate_pathname($input) ||
1377                 !(-d "$projectroot/$input") ||
1378                 !check_export_ok("$projectroot/$input") ||
1379                 ($strict_export && !project_in_list($input))) {
1380                 return undef;
1381         } else {
1382                 return $input;
1383         }
1384 }
1385
1386 sub validate_pathname {
1387         my $input = shift || return undef;
1388
1389         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1390         # at the beginning, at the end, and between slashes.
1391         # also this catches doubled slashes
1392         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1393                 return undef;
1394         }
1395         # no null characters
1396         if ($input =~ m!\0!) {
1397                 return undef;
1398         }
1399         return $input;
1400 }
1401
1402 sub validate_refname {
1403         my $input = shift || return undef;
1404
1405         # textual hashes are O.K.
1406         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1407                 return $input;
1408         }
1409         # it must be correct pathname
1410         $input = validate_pathname($input)
1411                 or return undef;
1412         # restrictions on ref name according to git-check-ref-format
1413         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1414                 return undef;
1415         }
1416         return $input;
1417 }
1418
1419 # decode sequences of octets in utf8 into Perl's internal form,
1420 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1421 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1422 sub to_utf8 {
1423         my $str = shift;
1424         return undef unless defined $str;
1425         if (utf8::valid($str)) {
1426                 utf8::decode($str);
1427                 return $str;
1428         } else {
1429                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1430         }
1431 }
1432
1433 # quote unsafe chars, but keep the slash, even when it's not
1434 # correct, but quoted slashes look too horrible in bookmarks
1435 sub esc_param {
1436         my $str = shift;
1437         return undef unless defined $str;
1438         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1439         $str =~ s/ /\+/g;
1440         return $str;
1441 }
1442
1443 # the quoting rules for path_info fragment are slightly different
1444 sub esc_path_info {
1445         my $str = shift;
1446         return undef unless defined $str;
1447
1448         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1449         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1450
1451         return $str;
1452 }
1453
1454 # quote unsafe chars in whole URL, so some characters cannot be quoted
1455 sub esc_url {
1456         my $str = shift;
1457         return undef unless defined $str;
1458         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1459         $str =~ s/ /\+/g;
1460         return $str;
1461 }
1462
1463 # quote unsafe characters in HTML attributes
1464 sub esc_attr {
1465
1466         # for XHTML conformance escaping '"' to '&quot;' is not enough
1467         return esc_html(@_);
1468 }
1469
1470 # replace invalid utf8 character with SUBSTITUTION sequence
1471 sub esc_html {
1472         my $str = shift;
1473         my %opts = @_;
1474
1475         return undef unless defined $str;
1476
1477         $str = to_utf8($str);
1478         $str = $cgi->escapeHTML($str);
1479         if ($opts{'-nbsp'}) {
1480                 $str =~ s/ /&nbsp;/g;
1481         }
1482         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1483         return $str;
1484 }
1485
1486 # quote control characters and escape filename to HTML
1487 sub esc_path {
1488         my $str = shift;
1489         my %opts = @_;
1490
1491         return undef unless defined $str;
1492
1493         $str = to_utf8($str);
1494         $str = $cgi->escapeHTML($str);
1495         if ($opts{'-nbsp'}) {
1496                 $str =~ s/ /&nbsp;/g;
1497         }
1498         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1499         return $str;
1500 }
1501
1502 # Make control characters "printable", using character escape codes (CEC)
1503 sub quot_cec {
1504         my $cntrl = shift;
1505         my %opts = @_;
1506         my %es = ( # character escape codes, aka escape sequences
1507                 "\t" => '\t',   # tab            (HT)
1508                 "\n" => '\n',   # line feed      (LF)
1509                 "\r" => '\r',   # carrige return (CR)
1510                 "\f" => '\f',   # form feed      (FF)
1511                 "\b" => '\b',   # backspace      (BS)
1512                 "\a" => '\a',   # alarm (bell)   (BEL)
1513                 "\e" => '\e',   # escape         (ESC)
1514                 "\013" => '\v', # vertical tab   (VT)
1515                 "\000" => '\0', # nul character  (NUL)
1516         );
1517         my $chr = ( (exists $es{$cntrl})
1518                     ? $es{$cntrl}
1519                     : sprintf('\%2x', ord($cntrl)) );
1520         if ($opts{-nohtml}) {
1521                 return $chr;
1522         } else {
1523                 return "<span class=\"cntrl\">$chr</span>";
1524         }
1525 }
1526
1527 # Alternatively use unicode control pictures codepoints,
1528 # Unicode "printable representation" (PR)
1529 sub quot_upr {
1530         my $cntrl = shift;
1531         my %opts = @_;
1532
1533         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1534         if ($opts{-nohtml}) {
1535                 return $chr;
1536         } else {
1537                 return "<span class=\"cntrl\">$chr</span>";
1538         }
1539 }
1540
1541 # git may return quoted and escaped filenames
1542 sub unquote {
1543         my $str = shift;
1544
1545         sub unq {
1546                 my $seq = shift;
1547                 my %es = ( # character escape codes, aka escape sequences
1548                         't' => "\t",   # tab            (HT, TAB)
1549                         'n' => "\n",   # newline        (NL)
1550                         'r' => "\r",   # return         (CR)
1551                         'f' => "\f",   # form feed      (FF)
1552                         'b' => "\b",   # backspace      (BS)
1553                         'a' => "\a",   # alarm (bell)   (BEL)
1554                         'e' => "\e",   # escape         (ESC)
1555                         'v' => "\013", # vertical tab   (VT)
1556                 );
1557
1558                 if ($seq =~ m/^[0-7]{1,3}$/) {
1559                         # octal char sequence
1560                         return chr(oct($seq));
1561                 } elsif (exists $es{$seq}) {
1562                         # C escape sequence, aka character escape code
1563                         return $es{$seq};
1564                 }
1565                 # quoted ordinary character
1566                 return $seq;
1567         }
1568
1569         if ($str =~ m/^"(.*)"$/) {
1570                 # needs unquoting
1571                 $str = $1;
1572                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1573         }
1574         return $str;
1575 }
1576
1577 # escape tabs (convert tabs to spaces)
1578 sub untabify {
1579         my $line = shift;
1580
1581         while ((my $pos = index($line, "\t")) != -1) {
1582                 if (my $count = (8 - ($pos % 8))) {
1583                         my $spaces = ' ' x $count;
1584                         $line =~ s/\t/$spaces/;
1585                 }
1586         }
1587
1588         return $line;
1589 }
1590
1591 sub project_in_list {
1592         my $project = shift;
1593         my @list = git_get_projects_list();
1594         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1595 }
1596
1597 ## ----------------------------------------------------------------------
1598 ## HTML aware string manipulation
1599
1600 # Try to chop given string on a word boundary between position
1601 # $len and $len+$add_len. If there is no word boundary there,
1602 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1603 # (marking chopped part) would be longer than given string.
1604 sub chop_str {
1605         my $str = shift;
1606         my $len = shift;
1607         my $add_len = shift || 10;
1608         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1609
1610         # Make sure perl knows it is utf8 encoded so we don't
1611         # cut in the middle of a utf8 multibyte char.
1612         $str = to_utf8($str);
1613
1614         # allow only $len chars, but don't cut a word if it would fit in $add_len
1615         # if it doesn't fit, cut it if it's still longer than the dots we would add
1616         # remove chopped character entities entirely
1617
1618         # when chopping in the middle, distribute $len into left and right part
1619         # return early if chopping wouldn't make string shorter
1620         if ($where eq 'center') {
1621                 return $str if ($len + 5 >= length($str)); # filler is length 5
1622                 $len = int($len/2);
1623         } else {
1624                 return $str if ($len + 4 >= length($str)); # filler is length 4
1625         }
1626
1627         # regexps: ending and beginning with word part up to $add_len
1628         my $endre = qr/.{$len}\w{0,$add_len}/;
1629         my $begre = qr/\w{0,$add_len}.{$len}/;
1630
1631         if ($where eq 'left') {
1632                 $str =~ m/^(.*?)($begre)$/;
1633                 my ($lead, $body) = ($1, $2);
1634                 if (length($lead) > 4) {
1635                         $lead = " ...";
1636                 }
1637                 return "$lead$body";
1638
1639         } elsif ($where eq 'center') {
1640                 $str =~ m/^($endre)(.*)$/;
1641                 my ($left, $str)  = ($1, $2);
1642                 $str =~ m/^(.*?)($begre)$/;
1643                 my ($mid, $right) = ($1, $2);
1644                 if (length($mid) > 5) {
1645                         $mid = " ... ";
1646                 }
1647                 return "$left$mid$right";
1648
1649         } else {
1650                 $str =~ m/^($endre)(.*)$/;
1651                 my $body = $1;
1652                 my $tail = $2;
1653                 if (length($tail) > 4) {
1654                         $tail = "... ";
1655                 }
1656                 return "$body$tail";
1657         }
1658 }
1659
1660 # takes the same arguments as chop_str, but also wraps a <span> around the
1661 # result with a title attribute if it does get chopped. Additionally, the
1662 # string is HTML-escaped.
1663 sub chop_and_escape_str {
1664         my ($str) = @_;
1665
1666         my $chopped = chop_str(@_);
1667         if ($chopped eq $str) {
1668                 return esc_html($chopped);
1669         } else {
1670                 $str =~ s/[[:cntrl:]]/?/g;
1671                 return $cgi->span({-title=>$str}, esc_html($chopped));
1672         }
1673 }
1674
1675 ## ----------------------------------------------------------------------
1676 ## functions returning short strings
1677
1678 # CSS class for given age value (in seconds)
1679 sub age_class {
1680         my $age = shift;
1681
1682         if (!defined $age) {
1683                 return "noage";
1684         } elsif ($age < 60*60*2) {
1685                 return "age0";
1686         } elsif ($age < 60*60*24*2) {
1687                 return "age1";
1688         } else {
1689                 return "age2";
1690         }
1691 }
1692
1693 # convert age in seconds to "nn units ago" string
1694 sub age_string {
1695         my $age = shift;
1696         my $age_str;
1697
1698         if ($age > 60*60*24*365*2) {
1699                 $age_str = (int $age/60/60/24/365);
1700                 $age_str .= " years ago";
1701         } elsif ($age > 60*60*24*(365/12)*2) {
1702                 $age_str = int $age/60/60/24/(365/12);
1703                 $age_str .= " months ago";
1704         } elsif ($age > 60*60*24*7*2) {
1705                 $age_str = int $age/60/60/24/7;
1706                 $age_str .= " weeks ago";
1707         } elsif ($age > 60*60*24*2) {
1708                 $age_str = int $age/60/60/24;
1709                 $age_str .= " days ago";
1710         } elsif ($age > 60*60*2) {
1711                 $age_str = int $age/60/60;
1712                 $age_str .= " hours ago";
1713         } elsif ($age > 60*2) {
1714                 $age_str = int $age/60;
1715                 $age_str .= " min ago";
1716         } elsif ($age > 2) {
1717                 $age_str = int $age;
1718                 $age_str .= " sec ago";
1719         } else {
1720                 $age_str .= " right now";
1721         }
1722         return $age_str;
1723 }
1724
1725 use constant {
1726         S_IFINVALID => 0030000,
1727         S_IFGITLINK => 0160000,
1728 };
1729
1730 # submodule/subproject, a commit object reference
1731 sub S_ISGITLINK {
1732         my $mode = shift;
1733
1734         return (($mode & S_IFMT) == S_IFGITLINK)
1735 }
1736
1737 # convert file mode in octal to symbolic file mode string
1738 sub mode_str {
1739         my $mode = oct shift;
1740
1741         if (S_ISGITLINK($mode)) {
1742                 return 'm---------';
1743         } elsif (S_ISDIR($mode & S_IFMT)) {
1744                 return 'drwxr-xr-x';
1745         } elsif (S_ISLNK($mode)) {
1746                 return 'lrwxrwxrwx';
1747         } elsif (S_ISREG($mode)) {
1748                 # git cares only about the executable bit
1749                 if ($mode & S_IXUSR) {
1750                         return '-rwxr-xr-x';
1751                 } else {
1752                         return '-rw-r--r--';
1753                 };
1754         } else {
1755                 return '----------';
1756         }
1757 }
1758
1759 # convert file mode in octal to file type string
1760 sub file_type {
1761         my $mode = shift;
1762
1763         if ($mode !~ m/^[0-7]+$/) {
1764                 return $mode;
1765         } else {
1766                 $mode = oct $mode;
1767         }
1768
1769         if (S_ISGITLINK($mode)) {
1770                 return "submodule";
1771         } elsif (S_ISDIR($mode & S_IFMT)) {
1772                 return "directory";
1773         } elsif (S_ISLNK($mode)) {
1774                 return "symlink";
1775         } elsif (S_ISREG($mode)) {
1776                 return "file";
1777         } else {
1778                 return "unknown";
1779         }
1780 }
1781
1782 # convert file mode in octal to file type description string
1783 sub file_type_long {
1784         my $mode = shift;
1785
1786         if ($mode !~ m/^[0-7]+$/) {
1787                 return $mode;
1788         } else {
1789                 $mode = oct $mode;
1790         }
1791
1792         if (S_ISGITLINK($mode)) {
1793                 return "submodule";
1794         } elsif (S_ISDIR($mode & S_IFMT)) {
1795                 return "directory";
1796         } elsif (S_ISLNK($mode)) {
1797                 return "symlink";
1798         } elsif (S_ISREG($mode)) {
1799                 if ($mode & S_IXUSR) {
1800                         return "executable";
1801                 } else {
1802                         return "file";
1803                 };
1804         } else {
1805                 return "unknown";
1806         }
1807 }
1808
1809
1810 ## ----------------------------------------------------------------------
1811 ## functions returning short HTML fragments, or transforming HTML fragments
1812 ## which don't belong to other sections
1813
1814 # format line of commit message.
1815 sub format_log_line_html {
1816         my $line = shift;
1817
1818         $line = esc_html($line, -nbsp=>1);
1819         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1820                 $cgi->a({-href => href(action=>"object", hash=>$1),
1821                                         -class => "text"}, $1);
1822         }eg;
1823
1824         return $line;
1825 }
1826
1827 # format marker of refs pointing to given object
1828
1829 # the destination action is chosen based on object type and current context:
1830 # - for annotated tags, we choose the tag view unless it's the current view
1831 #   already, in which case we go to shortlog view
1832 # - for other refs, we keep the current view if we're in history, shortlog or
1833 #   log view, and select shortlog otherwise
1834 sub format_ref_marker {
1835         my ($refs, $id) = @_;
1836         my $markers = '';
1837
1838         if (defined $refs->{$id}) {
1839                 foreach my $ref (@{$refs->{$id}}) {
1840                         # this code exploits the fact that non-lightweight tags are the
1841                         # only indirect objects, and that they are the only objects for which
1842                         # we want to use tag instead of shortlog as action
1843                         my ($type, $name) = qw();
1844                         my $indirect = ($ref =~ s/\^\{\}$//);
1845                         # e.g. tags/v2.6.11 or heads/next
1846                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1847                                 $type = $1;
1848                                 $name = $2;
1849                         } else {
1850                                 $type = "ref";
1851                                 $name = $ref;
1852                         }
1853
1854                         my $class = $type;
1855                         $class .= " indirect" if $indirect;
1856
1857                         my $dest_action = "shortlog";
1858
1859                         if ($indirect) {
1860                                 $dest_action = "tag" unless $action eq "tag";
1861                         } elsif ($action =~ /^(history|(short)?log)$/) {
1862                                 $dest_action = $action;
1863                         }
1864
1865                         my $dest = "";
1866                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1867                         $dest .= $ref;
1868
1869                         my $link = $cgi->a({
1870                                 -href => href(
1871                                         action=>$dest_action,
1872                                         hash=>$dest
1873                                 )}, $name);
1874
1875                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1876                                 $link . "</span>";
1877                 }
1878         }
1879
1880         if ($markers) {
1881                 return ' <span class="refs">'. $markers . '</span>';
1882         } else {
1883                 return "";
1884         }
1885 }
1886
1887 # format, perhaps shortened and with markers, title line
1888 sub format_subject_html {
1889         my ($long, $short, $href, $extra) = @_;
1890         $extra = '' unless defined($extra);
1891
1892         if (length($short) < length($long)) {
1893                 $long =~ s/[[:cntrl:]]/?/g;
1894                 return $cgi->a({-href => $href, -class => "list subject",
1895                                 -title => to_utf8($long)},
1896                        esc_html($short)) . $extra;
1897         } else {
1898                 return $cgi->a({-href => $href, -class => "list subject"},
1899                        esc_html($long)) . $extra;
1900         }
1901 }
1902
1903 # Rather than recomputing the url for an email multiple times, we cache it
1904 # after the first hit. This gives a visible benefit in views where the avatar
1905 # for the same email is used repeatedly (e.g. shortlog).
1906 # The cache is shared by all avatar engines (currently gravatar only), which
1907 # are free to use it as preferred. Since only one avatar engine is used for any
1908 # given page, there's no risk for cache conflicts.
1909 our %avatar_cache = ();
1910
1911 # Compute the picon url for a given email, by using the picon search service over at
1912 # http://www.cs.indiana.edu/picons/search.html
1913 sub picon_url {
1914         my $email = lc shift;
1915         if (!$avatar_cache{$email}) {
1916                 my ($user, $domain) = split('@', $email);
1917                 $avatar_cache{$email} =
1918                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1919                         "$domain/$user/" .
1920                         "users+domains+unknown/up/single";
1921         }
1922         return $avatar_cache{$email};
1923 }
1924
1925 # Compute the gravatar url for a given email, if it's not in the cache already.
1926 # Gravatar stores only the part of the URL before the size, since that's the
1927 # one computationally more expensive. This also allows reuse of the cache for
1928 # different sizes (for this particular engine).
1929 sub gravatar_url {
1930         my $email = lc shift;
1931         my $size = shift;
1932         $avatar_cache{$email} ||=
1933                 "http://www.gravatar.com/avatar/" .
1934                         Digest::MD5::md5_hex($email) . "?s=";
1935         return $avatar_cache{$email} . $size;
1936 }
1937
1938 # Insert an avatar for the given $email at the given $size if the feature
1939 # is enabled.
1940 sub git_get_avatar {
1941         my ($email, %opts) = @_;
1942         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1943         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1944         $opts{-size} ||= 'default';
1945         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1946         my $url = "";
1947         if ($git_avatar eq 'gravatar') {
1948                 $url = gravatar_url($email, $size);
1949         } elsif ($git_avatar eq 'picon') {
1950                 $url = picon_url($email);
1951         }
1952         # Other providers can be added by extending the if chain, defining $url
1953         # as needed. If no variant puts something in $url, we assume avatars
1954         # are completely disabled/unavailable.
1955         if ($url) {
1956                 return $pre_white .
1957                        "<img width=\"$size\" " .
1958                             "class=\"avatar\" " .
1959                             "src=\"".esc_url($url)."\" " .
1960                             "alt=\"\" " .
1961                        "/>" . $post_white;
1962         } else {
1963                 return "";
1964         }
1965 }
1966
1967 sub format_search_author {
1968         my ($author, $searchtype, $displaytext) = @_;
1969         my $have_search = gitweb_check_feature('search');
1970
1971         if ($have_search) {
1972                 my $performed = "";
1973                 if ($searchtype eq 'author') {
1974                         $performed = "authored";
1975                 } elsif ($searchtype eq 'committer') {
1976                         $performed = "committed";
1977                 }
1978
1979                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1980                                 searchtext=>$author,
1981                                 searchtype=>$searchtype), class=>"list",
1982                                 title=>"Search for commits $performed by $author"},
1983                                 $displaytext);
1984
1985         } else {
1986                 return $displaytext;
1987         }
1988 }
1989
1990 # format the author name of the given commit with the given tag
1991 # the author name is chopped and escaped according to the other
1992 # optional parameters (see chop_str).
1993 sub format_author_html {
1994         my $tag = shift;
1995         my $co = shift;
1996         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1997         return "<$tag class=\"author\">" .
1998                format_search_author($co->{'author_name'}, "author",
1999                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2000                        $author) .
2001                "</$tag>";
2002 }
2003
2004 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2005 sub format_git_diff_header_line {
2006         my $line = shift;
2007         my $diffinfo = shift;
2008         my ($from, $to) = @_;
2009
2010         if ($diffinfo->{'nparents'}) {
2011                 # combined diff
2012                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2013                 if ($to->{'href'}) {
2014                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2015                                          esc_path($to->{'file'}));
2016                 } else { # file was deleted (no href)
2017                         $line .= esc_path($to->{'file'});
2018                 }
2019         } else {
2020                 # "ordinary" diff
2021                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2022                 if ($from->{'href'}) {
2023                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2024                                          'a/' . esc_path($from->{'file'}));
2025                 } else { # file was added (no href)
2026                         $line .= 'a/' . esc_path($from->{'file'});
2027                 }
2028                 $line .= ' ';
2029                 if ($to->{'href'}) {
2030                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2031                                          'b/' . esc_path($to->{'file'}));
2032                 } else { # file was deleted
2033                         $line .= 'b/' . esc_path($to->{'file'});
2034                 }
2035         }
2036
2037         return "<div class=\"diff header\">$line</div>\n";
2038 }
2039
2040 # format extended diff header line, before patch itself
2041 sub format_extended_diff_header_line {
2042         my $line = shift;
2043         my $diffinfo = shift;
2044         my ($from, $to) = @_;
2045
2046         # match <path>
2047         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2048                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2049                                        esc_path($from->{'file'}));
2050         }
2051         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2052                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2053                                  esc_path($to->{'file'}));
2054         }
2055         # match single <mode>
2056         if ($line =~ m/\s(\d{6})$/) {
2057                 $line .= '<span class="info"> (' .
2058                          file_type_long($1) .
2059                          ')</span>';
2060         }
2061         # match <hash>
2062         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2063                 # can match only for combined diff
2064                 $line = 'index ';
2065                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2066                         if ($from->{'href'}[$i]) {
2067                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2068                                                   -class=>"hash"},
2069                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2070                         } else {
2071                                 $line .= '0' x 7;
2072                         }
2073                         # separator
2074                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2075                 }
2076                 $line .= '..';
2077                 if ($to->{'href'}) {
2078                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2079                                          substr($diffinfo->{'to_id'},0,7));
2080                 } else {
2081                         $line .= '0' x 7;
2082                 }
2083
2084         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2085                 # can match only for ordinary diff
2086                 my ($from_link, $to_link);
2087                 if ($from->{'href'}) {
2088                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2089                                              substr($diffinfo->{'from_id'},0,7));
2090                 } else {
2091                         $from_link = '0' x 7;
2092                 }
2093                 if ($to->{'href'}) {
2094                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2095                                            substr($diffinfo->{'to_id'},0,7));
2096                 } else {
2097                         $to_link = '0' x 7;
2098                 }
2099                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2100                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2101         }
2102
2103         return $line . "<br/>\n";
2104 }
2105
2106 # format from-file/to-file diff header
2107 sub format_diff_from_to_header {
2108         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2109         my $line;
2110         my $result = '';
2111
2112         $line = $from_line;
2113         #assert($line =~ m/^---/) if DEBUG;
2114         # no extra formatting for "^--- /dev/null"
2115         if (! $diffinfo->{'nparents'}) {
2116                 # ordinary (single parent) diff
2117                 if ($line =~ m!^--- "?a/!) {
2118                         if ($from->{'href'}) {
2119                                 $line = '--- a/' .
2120                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2121                                                 esc_path($from->{'file'}));
2122                         } else {
2123                                 $line = '--- a/' .
2124                                         esc_path($from->{'file'});
2125                         }
2126                 }
2127                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2128
2129         } else {
2130                 # combined diff (merge commit)
2131                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2132                         if ($from->{'href'}[$i]) {
2133                                 $line = '--- ' .
2134                                         $cgi->a({-href=>href(action=>"blobdiff",
2135                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2136                                                              hash_parent_base=>$parents[$i],
2137                                                              file_parent=>$from->{'file'}[$i],
2138                                                              hash=>$diffinfo->{'to_id'},
2139                                                              hash_base=>$hash,
2140                                                              file_name=>$to->{'file'}),
2141                                                  -class=>"path",
2142                                                  -title=>"diff" . ($i+1)},
2143                                                 $i+1) .
2144                                         '/' .
2145                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2146                                                 esc_path($from->{'file'}[$i]));
2147                         } else {
2148                                 $line = '--- /dev/null';
2149                         }
2150                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2151                 }
2152         }
2153
2154         $line = $to_line;
2155         #assert($line =~ m/^\+\+\+/) if DEBUG;
2156         # no extra formatting for "^+++ /dev/null"
2157         if ($line =~ m!^\+\+\+ "?b/!) {
2158                 if ($to->{'href'}) {
2159                         $line = '+++ b/' .
2160                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2161                                         esc_path($to->{'file'}));
2162                 } else {
2163                         $line = '+++ b/' .
2164                                 esc_path($to->{'file'});
2165                 }
2166         }
2167         $result .= qq!<div class="diff to_file">$line</div>\n!;
2168
2169         return $result;
2170 }
2171
2172 # create note for patch simplified by combined diff
2173 sub format_diff_cc_simplified {
2174         my ($diffinfo, @parents) = @_;
2175         my $result = '';
2176
2177         $result .= "<div class=\"diff header\">" .
2178                    "diff --cc ";
2179         if (!is_deleted($diffinfo)) {
2180                 $result .= $cgi->a({-href => href(action=>"blob",
2181                                                   hash_base=>$hash,
2182                                                   hash=>$diffinfo->{'to_id'},
2183                                                   file_name=>$diffinfo->{'to_file'}),
2184                                     -class => "path"},
2185                                    esc_path($diffinfo->{'to_file'}));
2186         } else {
2187                 $result .= esc_path($diffinfo->{'to_file'});
2188         }
2189         $result .= "</div>\n" . # class="diff header"
2190                    "<div class=\"diff nodifferences\">" .
2191                    "Simple merge" .
2192                    "</div>\n"; # class="diff nodifferences"
2193
2194         return $result;
2195 }
2196
2197 # format patch (diff) line (not to be used for diff headers)
2198 sub format_diff_line {
2199         my $line = shift;
2200         my ($from, $to) = @_;
2201         my $diff_class = "";
2202
2203         chomp $line;
2204
2205         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2206                 # combined diff
2207                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2208                 if ($line =~ m/^\@{3}/) {
2209                         $diff_class = " chunk_header";
2210                 } elsif ($line =~ m/^\\/) {
2211                         $diff_class = " incomplete";
2212                 } elsif ($prefix =~ tr/+/+/) {
2213                         $diff_class = " add";
2214                 } elsif ($prefix =~ tr/-/-/) {
2215                         $diff_class = " rem";
2216                 }
2217         } else {
2218                 # assume ordinary diff
2219                 my $char = substr($line, 0, 1);
2220                 if ($char eq '+') {
2221                         $diff_class = " add";
2222                 } elsif ($char eq '-') {
2223                         $diff_class = " rem";
2224                 } elsif ($char eq '@') {
2225                         $diff_class = " chunk_header";
2226                 } elsif ($char eq "\\") {
2227                         $diff_class = " incomplete";
2228                 }
2229         }
2230         $line = untabify($line);
2231         if ($from && $to && $line =~ m/^\@{2} /) {
2232                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2233                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2234
2235                 $from_lines = 0 unless defined $from_lines;
2236                 $to_lines   = 0 unless defined $to_lines;
2237
2238                 if ($from->{'href'}) {
2239                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2240                                              -class=>"list"}, $from_text);
2241                 }
2242                 if ($to->{'href'}) {
2243                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2244                                              -class=>"list"}, $to_text);
2245                 }
2246                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2247                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2248                 return "<div class=\"diff$diff_class\">$line</div>\n";
2249         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2250                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2251                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2252
2253                 @from_text = split(' ', $ranges);
2254                 for (my $i = 0; $i < @from_text; ++$i) {
2255                         ($from_start[$i], $from_nlines[$i]) =
2256                                 (split(',', substr($from_text[$i], 1)), 0);
2257                 }
2258
2259                 $to_text   = pop @from_text;
2260                 $to_start  = pop @from_start;
2261                 $to_nlines = pop @from_nlines;
2262
2263                 $line = "<span class=\"chunk_info\">$prefix ";
2264                 for (my $i = 0; $i < @from_text; ++$i) {
2265                         if ($from->{'href'}[$i]) {
2266                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2267                                                   -class=>"list"}, $from_text[$i]);
2268                         } else {
2269                                 $line .= $from_text[$i];
2270                         }
2271                         $line .= " ";
2272                 }
2273                 if ($to->{'href'}) {
2274                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2275                                           -class=>"list"}, $to_text);
2276                 } else {
2277                         $line .= $to_text;
2278                 }
2279                 $line .= " $prefix</span>" .
2280                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2281                 return "<div class=\"diff$diff_class\">$line</div>\n";
2282         }
2283         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2284 }
2285
2286 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2287 # linked.  Pass the hash of the tree/commit to snapshot.
2288 sub format_snapshot_links {
2289         my ($hash) = @_;
2290         my $num_fmts = @snapshot_fmts;
2291         if ($num_fmts > 1) {
2292                 # A parenthesized list of links bearing format names.
2293                 # e.g. "snapshot (_tar.gz_ _zip_)"
2294                 return "snapshot (" . join(' ', map
2295                         $cgi->a({
2296                                 -href => href(
2297                                         action=>"snapshot",
2298                                         hash=>$hash,
2299                                         snapshot_format=>$_
2300                                 )
2301                         }, $known_snapshot_formats{$_}{'display'})
2302                 , @snapshot_fmts) . ")";
2303         } elsif ($num_fmts == 1) {
2304                 # A single "snapshot" link whose tooltip bears the format name.
2305                 # i.e. "_snapshot_"
2306                 my ($fmt) = @snapshot_fmts;
2307                 return
2308                         $cgi->a({
2309                                 -href => href(
2310                                         action=>"snapshot",
2311                                         hash=>$hash,
2312                                         snapshot_format=>$fmt
2313                                 ),
2314                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2315                         }, "snapshot");
2316         } else { # $num_fmts == 0
2317                 return undef;
2318         }
2319 }
2320
2321 ## ......................................................................
2322 ## functions returning values to be passed, perhaps after some
2323 ## transformation, to other functions; e.g. returning arguments to href()
2324
2325 # returns hash to be passed to href to generate gitweb URL
2326 # in -title key it returns description of link
2327 sub get_feed_info {
2328         my $format = shift || 'Atom';
2329         my %res = (action => lc($format));
2330
2331         # feed links are possible only for project views
2332         return unless (defined $project);
2333         # some views should link to OPML, or to generic project feed,
2334         # or don't have specific feed yet (so they should use generic)
2335         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2336
2337         my $branch;
2338         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2339         # from tag links; this also makes possible to detect branch links
2340         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2341             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2342                 $branch = $1;
2343         }
2344         # find log type for feed description (title)
2345         my $type = 'log';
2346         if (defined $file_name) {
2347                 $type  = "history of $file_name";
2348                 $type .= "/" if ($action eq 'tree');
2349                 $type .= " on '$branch'" if (defined $branch);
2350         } else {
2351                 $type = "log of $branch" if (defined $branch);
2352         }
2353
2354         $res{-title} = $type;
2355         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2356         $res{'file_name'} = $file_name;
2357
2358         return %res;
2359 }
2360
2361 ## ----------------------------------------------------------------------
2362 ## git utility subroutines, invoking git commands
2363
2364 # returns path to the core git executable and the --git-dir parameter as list
2365 sub git_cmd {
2366         $number_of_git_cmds++;
2367         return $GIT, '--git-dir='.$git_dir;
2368 }
2369
2370 # quote the given arguments for passing them to the shell
2371 # quote_command("command", "arg 1", "arg with ' and ! characters")
2372 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2373 # Try to avoid using this function wherever possible.
2374 sub quote_command {
2375         return join(' ',
2376                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2377 }
2378
2379 # get HEAD ref of given project as hash
2380 sub git_get_head_hash {
2381         return git_get_full_hash(shift, 'HEAD');
2382 }
2383
2384 sub git_get_full_hash {
2385         return git_get_hash(@_);
2386 }
2387
2388 sub git_get_short_hash {
2389         return git_get_hash(@_, '--short=7');
2390 }
2391
2392 sub git_get_hash {
2393         my ($project, $hash, @options) = @_;
2394         my $o_git_dir = $git_dir;
2395         my $retval = undef;
2396         $git_dir = "$projectroot/$project";
2397         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2398             '--verify', '-q', @options, $hash) {
2399                 $retval = <$fd>;
2400                 chomp $retval if defined $retval;
2401                 close $fd;
2402         }
2403         if (defined $o_git_dir) {
2404                 $git_dir = $o_git_dir;
2405         }
2406         return $retval;
2407 }
2408
2409 # get type of given object
2410 sub git_get_type {
2411         my $hash = shift;
2412
2413         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2414         my $type = <$fd>;
2415         close $fd or return;
2416         chomp $type;
2417         return $type;
2418 }
2419
2420 # repository configuration
2421 our $config_file = '';
2422 our %config;
2423
2424 # store multiple values for single key as anonymous array reference
2425 # single values stored directly in the hash, not as [ <value> ]
2426 sub hash_set_multi {
2427         my ($hash, $key, $value) = @_;
2428
2429         if (!exists $hash->{$key}) {
2430                 $hash->{$key} = $value;
2431         } elsif (!ref $hash->{$key}) {
2432                 $hash->{$key} = [ $hash->{$key}, $value ];
2433         } else {
2434                 push @{$hash->{$key}}, $value;
2435         }
2436 }
2437
2438 # return hash of git project configuration
2439 # optionally limited to some section, e.g. 'gitweb'
2440 sub git_parse_project_config {
2441         my $section_regexp = shift;
2442         my %config;
2443
2444         local $/ = "\0";
2445
2446         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2447                 or return;
2448
2449         while (my $keyval = <$fh>) {
2450                 chomp $keyval;
2451                 my ($key, $value) = split(/\n/, $keyval, 2);
2452
2453                 hash_set_multi(\%config, $key, $value)
2454                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2455         }
2456         close $fh;
2457
2458         return %config;
2459 }
2460
2461 # convert config value to boolean: 'true' or 'false'
2462 # no value, number > 0, 'true' and 'yes' values are true
2463 # rest of values are treated as false (never as error)
2464 sub config_to_bool {
2465         my $val = shift;
2466
2467         return 1 if !defined $val;             # section.key
2468
2469         # strip leading and trailing whitespace
2470         $val =~ s/^\s+//;
2471         $val =~ s/\s+$//;
2472
2473         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2474                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2475 }
2476
2477 # convert config value to simple decimal number
2478 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2479 # to be multiplied by 1024, 1048576, or 1073741824
2480 sub config_to_int {
2481         my $val = shift;
2482
2483         # strip leading and trailing whitespace
2484         $val =~ s/^\s+//;
2485         $val =~ s/\s+$//;
2486
2487         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2488                 $unit = lc($unit);
2489                 # unknown unit is treated as 1
2490                 return $num * ($unit eq 'g' ? 1073741824 :
2491                                $unit eq 'm' ?    1048576 :
2492                                $unit eq 'k' ?       1024 : 1);
2493         }
2494         return $val;
2495 }
2496
2497 # convert config value to array reference, if needed
2498 sub config_to_multi {
2499         my $val = shift;
2500
2501         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2502 }
2503
2504 sub git_get_project_config {
2505         my ($key, $type) = @_;
2506
2507         return unless defined $git_dir;
2508
2509         # key sanity check
2510         return unless ($key);
2511         $key =~ s/^gitweb\.//;
2512         return if ($key =~ m/\W/);
2513
2514         # type sanity check
2515         if (defined $type) {
2516                 $type =~ s/^--//;
2517                 $type = undef
2518                         unless ($type eq 'bool' || $type eq 'int');
2519         }
2520
2521         # get config
2522         if (!defined $config_file ||
2523             $config_file ne "$git_dir/config") {
2524                 %config = git_parse_project_config('gitweb');
2525                 $config_file = "$git_dir/config";
2526         }
2527
2528         # check if config variable (key) exists
2529         return unless exists $config{"gitweb.$key"};
2530
2531         # ensure given type
2532         if (!defined $type) {
2533                 return $config{"gitweb.$key"};
2534         } elsif ($type eq 'bool') {
2535                 # backward compatibility: 'git config --bool' returns true/false
2536                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2537         } elsif ($type eq 'int') {
2538                 return config_to_int($config{"gitweb.$key"});
2539         }
2540         return $config{"gitweb.$key"};
2541 }
2542
2543 # get hash of given path at given ref
2544 sub git_get_hash_by_path {
2545         my $base = shift;
2546         my $path = shift || return undef;
2547         my $type = shift;
2548
2549         $path =~ s,/+$,,;
2550
2551         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2552                 or die_error(500, "Open git-ls-tree failed");
2553         my $line = <$fd>;
2554         close $fd or return undef;
2555
2556         if (!defined $line) {
2557                 # there is no tree or hash given by $path at $base
2558                 return undef;
2559         }
2560
2561         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2562         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2563         if (defined $type && $type ne $2) {
2564                 # type doesn't match
2565                 return undef;
2566         }
2567         return $3;
2568 }
2569
2570 # get path of entry with given hash at given tree-ish (ref)
2571 # used to get 'from' filename for combined diff (merge commit) for renames
2572 sub git_get_path_by_hash {
2573         my $base = shift || return;
2574         my $hash = shift || return;
2575
2576         local $/ = "\0";
2577
2578         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2579                 or return undef;
2580         while (my $line = <$fd>) {
2581                 chomp $line;
2582
2583                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2584                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2585                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2586                         close $fd;
2587                         return $1;
2588                 }
2589         }
2590         close $fd;
2591         return undef;
2592 }
2593
2594 ## ......................................................................
2595 ## git utility functions, directly accessing git repository
2596
2597 # get the value of config variable either from file named as the variable
2598 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2599 # configuration variable in the repository config file.
2600 sub git_get_file_or_project_config {
2601         my ($path, $name) = @_;
2602
2603         $git_dir = "$projectroot/$path";
2604         open my $fd, '<', "$git_dir/$name"
2605                 or return git_get_project_config($name);
2606         my $conf = <$fd>;
2607         close $fd;
2608         if (defined $conf) {
2609                 chomp $conf;
2610         }
2611         return $conf;
2612 }
2613
2614 sub git_get_project_description {
2615         my $path = shift;
2616         return git_get_file_or_project_config($path, 'description');
2617 }
2618
2619 sub git_get_project_category {
2620         my $path = shift;
2621         return git_get_file_or_project_config($path, 'category');
2622 }
2623
2624
2625 # supported formats:
2626 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2627 #   - if its contents is a number, use it as tag weight,
2628 #   - otherwise add a tag with weight 1
2629 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2630 #   the same value multiple times increases tag weight
2631 # * `gitweb.ctag' multi-valued repo config variable
2632 sub git_get_project_ctags {
2633         my $project = shift;
2634         my $ctags = {};
2635
2636         $git_dir = "$projectroot/$project";
2637         if (opendir my $dh, "$git_dir/ctags") {
2638                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2639                 foreach my $tagfile (@files) {
2640                         open my $ct, '<', $tagfile
2641                                 or next;
2642                         my $val = <$ct>;
2643                         chomp $val if $val;
2644                         close $ct;
2645
2646                         (my $ctag = $tagfile) =~ s#.*/##;
2647                         if ($val =~ /\d+/) {
2648                                 $ctags->{$ctag} = $val;
2649                         } else {
2650                                 $ctags->{$ctag} = 1;
2651                         }
2652                 }
2653                 closedir $dh;
2654
2655         } elsif (open my $fh, '<', "$git_dir/ctags") {
2656                 while (my $line = <$fh>) {
2657                         chomp $line;
2658                         $ctags->{$line}++ if $line;
2659                 }
2660                 close $fh;
2661
2662         } else {
2663                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2664                 foreach my $tag (@$taglist) {
2665                         $ctags->{$tag}++;
2666                 }
2667         }
2668
2669         return $ctags;
2670 }
2671
2672 # return hash, where keys are content tags ('ctags'),
2673 # and values are sum of weights of given tag in every project
2674 sub git_gather_all_ctags {
2675         my $projects = shift;
2676         my $ctags = {};
2677
2678         foreach my $p (@$projects) {
2679                 foreach my $ct (keys %{$p->{'ctags'}}) {
2680                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2681                 }
2682         }
2683
2684         return $ctags;
2685 }
2686
2687 sub git_populate_project_tagcloud {
2688         my $ctags = shift;
2689
2690         # First, merge different-cased tags; tags vote on casing
2691         my %ctags_lc;
2692         foreach (keys %$ctags) {
2693                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2694                 if (not $ctags_lc{lc $_}->{topcount}
2695                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2696                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2697                         $ctags_lc{lc $_}->{topname} = $_;
2698                 }
2699         }
2700
2701         my $cloud;
2702         my $matched = $cgi->param('by_tag');
2703         if (eval { require HTML::TagCloud; 1; }) {
2704                 $cloud = HTML::TagCloud->new;
2705                 foreach my $ctag (sort keys %ctags_lc) {
2706                         # Pad the title with spaces so that the cloud looks
2707                         # less crammed.
2708                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2709                         $title =~ s/ /&nbsp;/g;
2710                         $title =~ s/^/&nbsp;/g;
2711                         $title =~ s/$/&nbsp;/g;
2712                         if (defined $matched && $matched eq $ctag) {
2713                                 $title = qq(<span class="match">$title</span>);
2714                         }
2715                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2716                                     $ctags_lc{$ctag}->{count});
2717                 }
2718         } else {
2719                 $cloud = {};
2720                 foreach my $ctag (keys %ctags_lc) {
2721                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2722                         if (defined $matched && $matched eq $ctag) {
2723                                 $title = qq(<span class="match">$title</span>);
2724                         }
2725                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2726                         $cloud->{$ctag}{ctag} =
2727                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2728                 }
2729         }
2730         return $cloud;
2731 }
2732
2733 sub git_show_project_tagcloud {
2734         my ($cloud, $count) = @_;
2735         if (ref $cloud eq 'HTML::TagCloud') {
2736                 return $cloud->html_and_css($count);
2737         } else {
2738                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2739                 return
2740                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2741                         join (', ', map {
2742                                 $cloud->{$_}->{'ctag'}
2743                         } splice(@tags, 0, $count)) .
2744                         '</div>';
2745         }
2746 }
2747
2748 sub git_get_project_url_list {
2749         my $path = shift;
2750
2751         $git_dir = "$projectroot/$path";
2752         open my $fd, '<', "$git_dir/cloneurl"
2753                 or return wantarray ?
2754                 @{ config_to_multi(git_get_project_config('url')) } :
2755                    config_to_multi(git_get_project_config('url'));
2756         my @git_project_url_list = map { chomp; $_ } <$fd>;
2757         close $fd;
2758
2759         return wantarray ? @git_project_url_list : \@git_project_url_list;
2760 }
2761
2762 sub git_get_projects_list {
2763         my $filter = shift || '';
2764         my @list;
2765
2766         $filter =~ s/\.git$//;
2767
2768         if (-d $projects_list) {
2769                 # search in directory
2770                 my $dir = $projects_list;
2771                 # remove the trailing "/"
2772                 $dir =~ s!/+$!!;
2773                 my $pfxlen = length("$projects_list");
2774                 my $pfxdepth = ($projects_list =~ tr!/!!);
2775                 # when filtering, search only given subdirectory
2776                 if ($filter) {
2777                         $dir .= "/$filter";
2778                         $dir =~ s!/+$!!;
2779                 }
2780
2781                 File::Find::find({
2782                         follow_fast => 1, # follow symbolic links
2783                         follow_skip => 2, # ignore duplicates
2784                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2785                         wanted => sub {
2786                                 # global variables
2787                                 our $project_maxdepth;
2788                                 our $projectroot;
2789                                 # skip project-list toplevel, if we get it.
2790                                 return if (m!^[/.]$!);
2791                                 # only directories can be git repositories
2792                                 return unless (-d $_);
2793                                 # don't traverse too deep (Find is super slow on os x)
2794                                 # $project_maxdepth excludes depth of $projectroot
2795                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2796                                         $File::Find::prune = 1;
2797                                         return;
2798                                 }
2799
2800                                 my $path = substr($File::Find::name, $pfxlen + 1);
2801                                 # we check related file in $projectroot
2802                                 if (check_export_ok("$projectroot/$path")) {
2803                                         push @list, { path => $path };
2804                                         $File::Find::prune = 1;
2805                                 }
2806                         },
2807                 }, "$dir");
2808
2809         } elsif (-f $projects_list) {
2810                 # read from file(url-encoded):
2811                 # 'git%2Fgit.git Linus+Torvalds'
2812                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2813                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2814                 open my $fd, '<', $projects_list or return;
2815         PROJECT:
2816                 while (my $line = <$fd>) {
2817                         chomp $line;
2818                         my ($path, $owner) = split ' ', $line;
2819                         $path = unescape($path);
2820                         $owner = unescape($owner);
2821                         if (!defined $path) {
2822                                 next;
2823                         }
2824                         # if $filter is rpovided, check if $path begins with $filter
2825                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2826                                 next;
2827                         }
2828                         if (check_export_ok("$projectroot/$path")) {
2829                                 my $pr = {
2830                                         path => $path,
2831                                         owner => to_utf8($owner),
2832                                 };
2833                                 push @list, $pr;
2834                         }
2835                 }
2836                 close $fd;
2837         }
2838         return @list;
2839 }
2840
2841 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2842 # as side effects it sets 'forks' field to list of forks for forked projects
2843 sub filter_forks_from_projects_list {
2844         my $projects = shift;
2845
2846         my %trie; # prefix tree of directories (path components)
2847         # generate trie out of those directories that might contain forks
2848         foreach my $pr (@$projects) {
2849                 my $path = $pr->{'path'};
2850                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2851                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2852                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2853                 next unless (-d $path);   # containing directory exists
2854                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2855
2856                 # add to trie
2857                 my @dirs = split('/', $path);
2858                 # walk the trie, until either runs out of components or out of trie
2859                 my $ref = \%trie;
2860                 while (scalar @dirs &&
2861                        exists($ref->{$dirs[0]})) {
2862                         $ref = $ref->{shift @dirs};
2863                 }
2864                 # create rest of trie structure from rest of components
2865                 foreach my $dir (@dirs) {
2866                         $ref = $ref->{$dir} = {};
2867                 }
2868                 # create end marker, store $pr as a data
2869                 $ref->{''} = $pr if (!exists $ref->{''});
2870         }
2871
2872         # filter out forks, by finding shortest prefix match for paths
2873         my @filtered;
2874  PROJECT:
2875         foreach my $pr (@$projects) {
2876                 # trie lookup
2877                 my $ref = \%trie;
2878         DIR:
2879                 foreach my $dir (split('/', $pr->{'path'})) {
2880                         if (exists $ref->{''}) {
2881                                 # found [shortest] prefix, is a fork - skip it
2882                                 push @{$ref->{''}{'forks'}}, $pr;
2883                                 next PROJECT;
2884                         }
2885                         if (!exists $ref->{$dir}) {
2886                                 # not in trie, cannot have prefix, not a fork
2887                                 push @filtered, $pr;
2888                                 next PROJECT;
2889                         }
2890                         # If the dir is there, we just walk one step down the trie.
2891                         $ref = $ref->{$dir};
2892                 }
2893                 # we ran out of trie
2894                 # (shouldn't happen: it's either no match, or end marker)
2895                 push @filtered, $pr;
2896         }
2897
2898         return @filtered;
2899 }
2900
2901 # note: fill_project_list_info must be run first,
2902 # for 'descr_long' and 'ctags' to be filled
2903 sub search_projects_list {
2904         my ($projlist, %opts) = @_;
2905         my $tagfilter  = $opts{'tagfilter'};
2906         my $searchtext = $opts{'searchtext'};
2907
2908         return @$projlist
2909                 unless ($tagfilter || $searchtext);
2910
2911         my @projects;
2912  PROJECT:
2913         foreach my $pr (@$projlist) {
2914
2915                 if ($tagfilter) {
2916                         next unless ref($pr->{'ctags'}) eq 'HASH';
2917                         next unless
2918                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2919                 }
2920
2921                 if ($searchtext) {
2922                         next unless
2923                                 $pr->{'path'} =~ /$searchtext/ ||
2924                                 $pr->{'descr_long'} =~ /$searchtext/;
2925                 }
2926
2927                 push @projects, $pr;
2928         }
2929
2930         return @projects;
2931 }
2932
2933 our $gitweb_project_owner = undef;
2934 sub git_get_project_list_from_file {
2935
2936         return if (defined $gitweb_project_owner);
2937
2938         $gitweb_project_owner = {};
2939         # read from file (url-encoded):
2940         # 'git%2Fgit.git Linus+Torvalds'
2941         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2942         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2943         if (-f $projects_list) {
2944                 open(my $fd, '<', $projects_list);
2945                 while (my $line = <$fd>) {
2946                         chomp $line;
2947                         my ($pr, $ow) = split ' ', $line;
2948                         $pr = unescape($pr);
2949                         $ow = unescape($ow);
2950                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2951                 }
2952                 close $fd;
2953         }
2954 }
2955
2956 sub git_get_project_owner {
2957         my $project = shift;
2958         my $owner;
2959
2960         return undef unless $project;
2961         $git_dir = "$projectroot/$project";
2962
2963         if (!defined $gitweb_project_owner) {
2964                 git_get_project_list_from_file();
2965         }
2966
2967         if (exists $gitweb_project_owner->{$project}) {
2968                 $owner = $gitweb_project_owner->{$project};
2969         }
2970         if (!defined $owner){
2971                 $owner = git_get_project_config('owner');
2972         }
2973         if (!defined $owner) {
2974                 $owner = get_file_owner("$git_dir");
2975         }
2976
2977         return $owner;
2978 }
2979
2980 sub git_get_last_activity {
2981         my ($path) = @_;
2982         my $fd;
2983
2984         $git_dir = "$projectroot/$path";
2985         open($fd, "-|", git_cmd(), 'for-each-ref',
2986              '--format=%(committer)',
2987              '--sort=-committerdate',
2988              '--count=1',
2989              'refs/heads') or return;
2990         my $most_recent = <$fd>;
2991         close $fd or return;
2992         if (defined $most_recent &&
2993             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2994                 my $timestamp = $1;
2995                 my $age = time - $timestamp;
2996                 return ($age, age_string($age));
2997         }
2998         return (undef, undef);
2999 }
3000
3001 # Implementation note: when a single remote is wanted, we cannot use 'git
3002 # remote show -n' because that command always work (assuming it's a remote URL
3003 # if it's not defined), and we cannot use 'git remote show' because that would
3004 # try to make a network roundtrip. So the only way to find if that particular
3005 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3006 # and when we find what we want.
3007 sub git_get_remotes_list {
3008         my $wanted = shift;
3009         my %remotes = ();
3010
3011         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3012         return unless $fd;
3013         while (my $remote = <$fd>) {
3014                 chomp $remote;
3015                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3016                 next if $wanted and not $remote eq $wanted;
3017                 my ($url, $key) = ($1, $2);
3018
3019                 $remotes{$remote} ||= { 'heads' => () };
3020                 $remotes{$remote}{$key} = $url;
3021         }
3022         close $fd or return;
3023         return wantarray ? %remotes : \%remotes;
3024 }
3025
3026 # Takes a hash of remotes as first parameter and fills it by adding the
3027 # available remote heads for each of the indicated remotes.
3028 sub fill_remote_heads {
3029         my $remotes = shift;
3030         my @heads = map { "remotes/$_" } keys %$remotes;
3031         my @remoteheads = git_get_heads_list(undef, @heads);
3032         foreach my $remote (keys %$remotes) {
3033                 $remotes->{$remote}{'heads'} = [ grep {
3034                         $_->{'name'} =~ s!^$remote/!!
3035                         } @remoteheads ];
3036         }
3037 }
3038
3039 sub git_get_references {
3040         my $type = shift || "";
3041         my %refs;
3042         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3043         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3044         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3045                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3046                 or return;
3047
3048         while (my $line = <$fd>) {
3049                 chomp $line;
3050                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3051                         if (defined $refs{$1}) {
3052                                 push @{$refs{$1}}, $2;
3053                         } else {
3054                                 $refs{$1} = [ $2 ];
3055                         }
3056                 }
3057         }
3058         close $fd or return;
3059         return \%refs;
3060 }
3061
3062 sub git_get_rev_name_tags {
3063         my $hash = shift || return undef;
3064
3065         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3066                 or return;
3067         my $name_rev = <$fd>;
3068         close $fd;
3069
3070         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3071                 return $1;
3072         } else {
3073                 # catches also '$hash undefined' output
3074                 return undef;
3075         }
3076 }
3077
3078 ## ----------------------------------------------------------------------
3079 ## parse to hash functions
3080
3081 sub parse_date {
3082         my $epoch = shift;
3083         my $tz = shift || "-0000";
3084
3085         my %date;
3086         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3087         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3088         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3089         $date{'hour'} = $hour;
3090         $date{'minute'} = $min;
3091         $date{'mday'} = $mday;
3092         $date{'day'} = $days[$wday];
3093         $date{'month'} = $months[$mon];
3094         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3095                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3096         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3097                              $mday, $months[$mon], $hour ,$min;
3098         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3099                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3100
3101         my ($tz_sign, $tz_hour, $tz_min) =
3102                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3103         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3104         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3105         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3106         $date{'hour_local'} = $hour;
3107         $date{'minute_local'} = $min;
3108         $date{'tz_local'} = $tz;
3109         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3110                                   1900+$year, $mon+1, $mday,
3111                                   $hour, $min, $sec, $tz);
3112         return %date;
3113 }
3114
3115 sub parse_tag {
3116         my $tag_id = shift;
3117         my %tag;
3118         my @comment;
3119
3120         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3121         $tag{'id'} = $tag_id;
3122         while (my $line = <$fd>) {
3123                 chomp $line;
3124                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3125                         $tag{'object'} = $1;
3126                 } elsif ($line =~ m/^type (.+)$/) {
3127                         $tag{'type'} = $1;
3128                 } elsif ($line =~ m/^tag (.+)$/) {
3129                         $tag{'name'} = $1;
3130                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3131                         $tag{'author'} = $1;
3132                         $tag{'author_epoch'} = $2;
3133                         $tag{'author_tz'} = $3;
3134                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3135                                 $tag{'author_name'}  = $1;
3136                                 $tag{'author_email'} = $2;
3137                         } else {
3138                                 $tag{'author_name'} = $tag{'author'};
3139                         }
3140                 } elsif ($line =~ m/--BEGIN/) {
3141                         push @comment, $line;
3142                         last;
3143                 } elsif ($line eq "") {
3144                         last;
3145                 }
3146         }
3147         push @comment, <$fd>;
3148         $tag{'comment'} = \@comment;
3149         close $fd or return;
3150         if (!defined $tag{'name'}) {
3151                 return
3152         };
3153         return %tag
3154 }
3155
3156 sub parse_commit_text {
3157         my ($commit_text, $withparents) = @_;
3158         my @commit_lines = split '\n', $commit_text;
3159         my %co;
3160
3161         pop @commit_lines; # Remove '\0'
3162
3163         if (! @commit_lines) {
3164                 return;
3165         }
3166
3167         my $header = shift @commit_lines;
3168         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3169                 return;
3170         }
3171         ($co{'id'}, my @parents) = split ' ', $header;
3172         while (my $line = shift @commit_lines) {
3173                 last if $line eq "\n";
3174                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3175                         $co{'tree'} = $1;
3176                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3177                         push @parents, $1;
3178                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3179                         $co{'author'} = to_utf8($1);
3180                         $co{'author_epoch'} = $2;
3181                         $co{'author_tz'} = $3;
3182                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3183                                 $co{'author_name'}  = $1;
3184                                 $co{'author_email'} = $2;
3185                         } else {
3186                                 $co{'author_name'} = $co{'author'};
3187                         }
3188                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3189                         $co{'committer'} = to_utf8($1);
3190                         $co{'committer_epoch'} = $2;
3191                         $co{'committer_tz'} = $3;
3192                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3193                                 $co{'committer_name'}  = $1;
3194                                 $co{'committer_email'} = $2;
3195                         } else {
3196                                 $co{'committer_name'} = $co{'committer'};
3197                         }
3198                 }
3199         }
3200         if (!defined $co{'tree'}) {
3201                 return;
3202         };
3203         $co{'parents'} = \@parents;
3204         $co{'parent'} = $parents[0];
3205
3206         foreach my $title (@commit_lines) {
3207                 $title =~ s/^    //;
3208                 if ($title ne "") {
3209                         $co{'title'} = chop_str($title, 80, 5);
3210                         # remove leading stuff of merges to make the interesting part visible
3211                         if (length($title) > 50) {
3212                                 $title =~ s/^Automatic //;
3213                                 $title =~ s/^merge (of|with) /Merge ... /i;
3214                                 if (length($title) > 50) {
3215                                         $title =~ s/(http|rsync):\/\///;
3216                                 }
3217                                 if (length($title) > 50) {
3218                                         $title =~ s/(master|www|rsync)\.//;
3219                                 }
3220                                 if (length($title) > 50) {
3221                                         $title =~ s/kernel.org:?//;
3222                                 }
3223                                 if (length($title) > 50) {
3224                                         $title =~ s/\/pub\/scm//;
3225                                 }
3226                         }
3227                         $co{'title_short'} = chop_str($title, 50, 5);
3228                         last;
3229                 }
3230         }
3231         if (! defined $co{'title'} || $co{'title'} eq "") {
3232                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3233         }
3234         # remove added spaces
3235         foreach my $line (@commit_lines) {
3236                 $line =~ s/^    //;
3237         }
3238         $co{'comment'} = \@commit_lines;
3239
3240         my $age = time - $co{'committer_epoch'};
3241         $co{'age'} = $age;
3242         $co{'age_string'} = age_string($age);
3243         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3244         if ($age > 60*60*24*7*2) {
3245                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3246                 $co{'age_string_age'} = $co{'age_string'};
3247         } else {
3248                 $co{'age_string_date'} = $co{'age_string'};
3249                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3250         }
3251         return %co;
3252 }
3253
3254 sub parse_commit {
3255         my ($commit_id) = @_;
3256         my %co;
3257
3258         local $/ = "\0";
3259
3260         open my $fd, "-|", git_cmd(), "rev-list",
3261                 "--parents",
3262                 "--header",
3263                 "--max-count=1",
3264                 $commit_id,
3265                 "--",
3266                 or die_error(500, "Open git-rev-list failed");
3267         %co = parse_commit_text(<$fd>, 1);
3268         close $fd;
3269
3270         return %co;
3271 }
3272
3273 sub parse_commits {
3274         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3275         my @cos;
3276
3277         $maxcount ||= 1;
3278         $skip ||= 0;
3279
3280         local $/ = "\0";
3281
3282         open my $fd, "-|", git_cmd(), "rev-list",
3283                 "--header",
3284                 @args,
3285                 ("--max-count=" . $maxcount),
3286                 ("--skip=" . $skip),
3287                 @extra_options,
3288                 $commit_id,
3289                 "--",
3290                 ($filename ? ($filename) : ())
3291                 or die_error(500, "Open git-rev-list failed");
3292         while (my $line = <$fd>) {
3293                 my %co = parse_commit_text($line);
3294                 push @cos, \%co;
3295         }
3296         close $fd;
3297
3298         return wantarray ? @cos : \@cos;
3299 }
3300
3301 # parse line of git-diff-tree "raw" output
3302 sub parse_difftree_raw_line {
3303         my $line = shift;
3304         my %res;
3305
3306         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3307         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3308         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3309                 $res{'from_mode'} = $1;
3310                 $res{'to_mode'} = $2;
3311                 $res{'from_id'} = $3;
3312                 $res{'to_id'} = $4;
3313                 $res{'status'} = $5;
3314                 $res{'similarity'} = $6;
3315                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3316                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3317                 } else {
3318                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3319                 }
3320         }
3321         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3322         # combined diff (for merge commit)
3323         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3324                 $res{'nparents'}  = length($1);
3325                 $res{'from_mode'} = [ split(' ', $2) ];
3326                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3327                 $res{'from_id'} = [ split(' ', $3) ];
3328                 $res{'to_id'} = pop @{$res{'from_id'}};
3329                 $res{'status'} = [ split('', $4) ];
3330                 $res{'to_file'} = unquote($5);
3331         }
3332         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3333         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3334                 $res{'commit'} = $1;
3335         }
3336
3337         return wantarray ? %res : \%res;
3338 }
3339
3340 # wrapper: return parsed line of git-diff-tree "raw" output
3341 # (the argument might be raw line, or parsed info)
3342 sub parsed_difftree_line {
3343         my $line_or_ref = shift;
3344
3345         if (ref($line_or_ref) eq "HASH") {
3346                 # pre-parsed (or generated by hand)
3347                 return $line_or_ref;
3348         } else {
3349                 return parse_difftree_raw_line($line_or_ref);
3350         }
3351 }
3352
3353 # parse line of git-ls-tree output
3354 sub parse_ls_tree_line {
3355         my $line = shift;
3356         my %opts = @_;
3357         my %res;
3358
3359         if ($opts{'-l'}) {
3360                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3361                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3362
3363                 $res{'mode'} = $1;
3364                 $res{'type'} = $2;
3365                 $res{'hash'} = $3;
3366                 $res{'size'} = $4;
3367                 if ($opts{'-z'}) {
3368                         $res{'name'} = $5;
3369                 } else {
3370                         $res{'name'} = unquote($5);
3371                 }
3372         } else {
3373                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3374                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3375
3376                 $res{'mode'} = $1;
3377                 $res{'type'} = $2;
3378                 $res{'hash'} = $3;
3379                 if ($opts{'-z'}) {
3380                         $res{'name'} = $4;
3381                 } else {
3382                         $res{'name'} = unquote($4);
3383                 }
3384         }
3385
3386         return wantarray ? %res : \%res;
3387 }
3388
3389 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3390 sub parse_from_to_diffinfo {
3391         my ($diffinfo, $from, $to, @parents) = @_;
3392
3393         if ($diffinfo->{'nparents'}) {
3394                 # combined diff
3395                 $from->{'file'} = [];
3396                 $from->{'href'} = [];
3397                 fill_from_file_info($diffinfo, @parents)
3398                         unless exists $diffinfo->{'from_file'};
3399                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3400                         $from->{'file'}[$i] =
3401                                 defined $diffinfo->{'from_file'}[$i] ?
3402                                         $diffinfo->{'from_file'}[$i] :
3403                                         $diffinfo->{'to_file'};
3404                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3405                                 $from->{'href'}[$i] = href(action=>"blob",
3406                                                            hash_base=>$parents[$i],
3407                                                            hash=>$diffinfo->{'from_id'}[$i],
3408                                                            file_name=>$from->{'file'}[$i]);
3409                         } else {
3410                                 $from->{'href'}[$i] = undef;
3411                         }
3412                 }
3413         } else {
3414                 # ordinary (not combined) diff
3415                 $from->{'file'} = $diffinfo->{'from_file'};
3416                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3417                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3418                                                hash=>$diffinfo->{'from_id'},
3419                                                file_name=>$from->{'file'});
3420                 } else {
3421                         delete $from->{'href'};
3422                 }
3423         }
3424
3425         $to->{'file'} = $diffinfo->{'to_file'};
3426         if (!is_deleted($diffinfo)) { # file exists in result
3427                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3428                                      hash=>$diffinfo->{'to_id'},
3429                                      file_name=>$to->{'file'});
3430         } else {
3431                 delete $to->{'href'};
3432         }
3433 }
3434
3435 ## ......................................................................
3436 ## parse to array of hashes functions
3437
3438 sub git_get_heads_list {
3439         my ($limit, @classes) = @_;
3440         @classes = ('heads') unless @classes;
3441         my @patterns = map { "refs/$_" } @classes;
3442         my @headslist;
3443
3444         open my $fd, '-|', git_cmd(), 'for-each-ref',
3445                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3446                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3447                 @patterns
3448                 or return;
3449         while (my $line = <$fd>) {
3450                 my %ref_item;
3451
3452                 chomp $line;
3453                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3454                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3455                 my ($committer, $epoch, $tz) =
3456                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3457                 $ref_item{'fullname'}  = $name;
3458                 $name =~ s!^refs/(?:head|remote)s/!!;
3459
3460                 $ref_item{'name'}  = $name;
3461                 $ref_item{'id'}    = $hash;
3462                 $ref_item{'title'} = $title || '(no commit message)';
3463                 $ref_item{'epoch'} = $epoch;
3464                 if ($epoch) {
3465                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3466                 } else {
3467                         $ref_item{'age'} = "unknown";
3468                 }
3469
3470                 push @headslist, \%ref_item;
3471         }
3472         close $fd;
3473
3474         return wantarray ? @headslist : \@headslist;
3475 }
3476
3477 sub git_get_tags_list {
3478         my $limit = shift;
3479         my @tagslist;
3480
3481         open my $fd, '-|', git_cmd(), 'for-each-ref',
3482                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3483                 '--format=%(objectname) %(objecttype) %(refname) '.
3484                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3485                 'refs/tags'
3486                 or return;
3487         while (my $line = <$fd>) {
3488                 my %ref_item;
3489
3490                 chomp $line;
3491                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3492                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3493                 my ($creator, $epoch, $tz) =
3494                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3495                 $ref_item{'fullname'} = $name;
3496                 $name =~ s!^refs/tags/!!;
3497
3498                 $ref_item{'type'} = $type;
3499                 $ref_item{'id'} = $id;
3500                 $ref_item{'name'} = $name;
3501                 if ($type eq "tag") {
3502                         $ref_item{'subject'} = $title;
3503                         $ref_item{'reftype'} = $reftype;
3504                         $ref_item{'refid'}   = $refid;
3505                 } else {
3506                         $ref_item{'reftype'} = $type;
3507                         $ref_item{'refid'}   = $id;
3508                 }
3509
3510                 if ($type eq "tag" || $type eq "commit") {
3511                         $ref_item{'epoch'} = $epoch;
3512                         if ($epoch) {
3513                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3514                         } else {
3515                                 $ref_item{'age'} = "unknown";
3516                         }
3517                 }
3518
3519                 push @tagslist, \%ref_item;
3520         }
3521         close $fd;
3522
3523         return wantarray ? @tagslist : \@tagslist;
3524 }
3525
3526 ## ----------------------------------------------------------------------
3527 ## filesystem-related functions
3528
3529 sub get_file_owner {
3530         my $path = shift;
3531
3532         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3533         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3534         if (!defined $gcos) {
3535                 return undef;
3536         }
3537         my $owner = $gcos;
3538         $owner =~ s/[,;].*$//;
3539         return to_utf8($owner);
3540 }
3541
3542 # assume that file exists
3543 sub insert_file {
3544         my $filename = shift;
3545
3546         open my $fd, '<', $filename;
3547         print map { to_utf8($_) } <$fd>;
3548         close $fd;
3549 }
3550
3551 ## ......................................................................
3552 ## mimetype related functions
3553
3554 sub mimetype_guess_file {
3555         my $filename = shift;
3556         my $mimemap = shift;
3557         -r $mimemap or return undef;
3558
3559         my %mimemap;
3560         open(my $mh, '<', $mimemap) or return undef;
3561         while (<$mh>) {
3562                 next if m/^#/; # skip comments
3563                 my ($mimetype, $exts) = split(/\t+/);
3564                 if (defined $exts) {
3565                         my @exts = split(/\s+/, $exts);
3566                         foreach my $ext (@exts) {
3567                                 $mimemap{$ext} = $mimetype;
3568                         }
3569                 }
3570         }
3571         close($mh);
3572
3573         $filename =~ /\.([^.]*)$/;
3574         return $mimemap{$1};
3575 }
3576
3577 sub mimetype_guess {
3578         my $filename = shift;
3579         my $mime;
3580         $filename =~ /\./ or return undef;
3581
3582         if ($mimetypes_file) {
3583                 my $file = $mimetypes_file;
3584                 if ($file !~ m!^/!) { # if it is relative path
3585                         # it is relative to project
3586                         $file = "$projectroot/$project/$file";
3587                 }
3588                 $mime = mimetype_guess_file($filename, $file);
3589         }
3590         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3591         return $mime;
3592 }
3593
3594 sub blob_mimetype {
3595         my $fd = shift;
3596         my $filename = shift;
3597
3598         if ($filename) {
3599                 my $mime = mimetype_guess($filename);
3600                 $mime and return $mime;
3601         }
3602
3603         # just in case
3604         return $default_blob_plain_mimetype unless $fd;
3605
3606         if (-T $fd) {
3607                 return 'text/plain';
3608         } elsif (! $filename) {
3609                 return 'application/octet-stream';
3610         } elsif ($filename =~ m/\.png$/i) {
3611                 return 'image/png';
3612         } elsif ($filename =~ m/\.gif$/i) {
3613                 return 'image/gif';
3614         } elsif ($filename =~ m/\.jpe?g$/i) {
3615                 return 'image/jpeg';
3616         } else {
3617                 return 'application/octet-stream';
3618         }
3619 }
3620
3621 sub blob_contenttype {
3622         my ($fd, $file_name, $type) = @_;
3623
3624         $type ||= blob_mimetype($fd, $file_name);
3625         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3626                 $type .= "; charset=$default_text_plain_charset";
3627         }
3628
3629         return $type;
3630 }
3631
3632 # guess file syntax for syntax highlighting; return undef if no highlighting
3633 # the name of syntax can (in the future) depend on syntax highlighter used
3634 sub guess_file_syntax {
3635         my ($highlight, $mimetype, $file_name) = @_;
3636         return undef unless ($highlight && defined $file_name);
3637         my $basename = basename($file_name, '.in');
3638         return $highlight_basename{$basename}
3639                 if exists $highlight_basename{$basename};
3640
3641         $basename =~ /\.([^.]*)$/;
3642         my $ext = $1 or return undef;
3643         return $highlight_ext{$ext}
3644                 if exists $highlight_ext{$ext};
3645
3646         return undef;
3647 }
3648
3649 # run highlighter and return FD of its output,
3650 # or return original FD if no highlighting
3651 sub run_highlighter {
3652         my ($fd, $highlight, $syntax) = @_;
3653         return $fd unless ($highlight && defined $syntax);
3654
3655         close $fd;
3656         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3657                   quote_command($highlight_bin).
3658                   " --replace-tabs=8 --fragment --syntax $syntax |"
3659                 or die_error(500, "Couldn't open file or run syntax highlighter");
3660         return $fd;
3661 }
3662
3663 ## ======================================================================
3664 ## functions printing HTML: header, footer, error page
3665
3666 sub get_page_title {
3667         my $title = to_utf8($site_name);
3668
3669         return $title unless (defined $project);
3670         $title .= " - " . to_utf8($project);
3671
3672         return $title unless (defined $action);
3673         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3674
3675         return $title unless (defined $file_name);
3676         $title .= " - " . esc_path($file_name);
3677         if ($action eq "tree" && $file_name !~ m|/$|) {
3678                 $title .= "/";
3679         }
3680
3681         return $title;
3682 }
3683
3684 sub print_feed_meta {
3685         if (defined $project) {
3686                 my %href_params = get_feed_info();
3687                 if (!exists $href_params{'-title'}) {
3688                         $href_params{'-title'} = 'log';
3689                 }
3690
3691                 foreach my $format (qw(RSS Atom)) {
3692                         my $type = lc($format);
3693                         my %link_attr = (
3694                                 '-rel' => 'alternate',
3695                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3696                                 '-type' => "application/$type+xml"
3697                         );
3698
3699                         $href_params{'action'} = $type;
3700                         $link_attr{'-href'} = href(%href_params);
3701                         print "<link ".
3702                               "rel=\"$link_attr{'-rel'}\" ".
3703                               "title=\"$link_attr{'-title'}\" ".
3704                               "href=\"$link_attr{'-href'}\" ".
3705                               "type=\"$link_attr{'-type'}\" ".
3706                               "/>\n";
3707
3708                         $href_params{'extra_options'} = '--no-merges';
3709                         $link_attr{'-href'} = href(%href_params);
3710                         $link_attr{'-title'} .= ' (no merges)';
3711                         print "<link ".
3712                               "rel=\"$link_attr{'-rel'}\" ".
3713                               "title=\"$link_attr{'-title'}\" ".
3714                               "href=\"$link_attr{'-href'}\" ".
3715                               "type=\"$link_attr{'-type'}\" ".
3716                               "/>\n";
3717                 }
3718
3719         } else {
3720                 printf('<link rel="alternate" title="%s projects list" '.
3721                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3722                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3723                 printf('<link rel="alternate" title="%s projects feeds" '.
3724                        'href="%s" type="text/x-opml" />'."\n",
3725                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3726         }
3727 }
3728
3729 sub git_header_html {
3730         my $status = shift || "200 OK";
3731         my $expires = shift;
3732         my %opts = @_;
3733
3734         my $title = get_page_title();
3735         my $content_type;
3736         # require explicit support from the UA if we are to send the page as
3737         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3738         # we have to do this because MSIE sometimes globs '*/*', pretending to
3739         # support xhtml+xml but choking when it gets what it asked for.
3740         if (defined $cgi->http('HTTP_ACCEPT') &&
3741             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3742             $cgi->Accept('application/xhtml+xml') != 0) {
3743                 $content_type = 'application/xhtml+xml';
3744         } else {
3745                 $content_type = 'text/html';
3746         }
3747         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3748                            -status=> $status, -expires => $expires)
3749                 unless ($opts{'-no_http_header'});
3750         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3751         print <<EOF;
3752 <?xml version="1.0" encoding="utf-8"?>
3753 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3754 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3755 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3756 <!-- git core binaries version $git_version -->
3757 <head>
3758 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3759 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3760 <meta name="robots" content="index, nofollow"/>
3761 <title>$title</title>
3762 EOF
3763         # the stylesheet, favicon etc urls won't work correctly with path_info
3764         # unless we set the appropriate base URL
3765         if ($ENV{'PATH_INFO'}) {
3766                 print "<base href=\"".esc_url($base_url)."\" />\n";
3767         }
3768         # print out each stylesheet that exist, providing backwards capability
3769         # for those people who defined $stylesheet in a config file
3770         if (defined $stylesheet) {
3771                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3772         } else {
3773                 foreach my $stylesheet (@stylesheets) {
3774                         next unless $stylesheet;
3775                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3776                 }
3777         }
3778         print_feed_meta()
3779                 if ($status eq '200 OK');
3780         if (defined $favicon) {
3781                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3782         }
3783
3784         print "</head>\n" .
3785               "<body>\n";
3786
3787         if (defined $site_header && -f $site_header) {
3788                 insert_file($site_header);
3789         }
3790
3791         print "<div class=\"page_header\">\n";
3792         if (defined $logo) {
3793                 print $cgi->a({-href => esc_url($logo_url),
3794                                -title => $logo_label},
3795                               $cgi->img({-src => esc_url($logo),
3796                                          -width => 72, -height => 27,
3797                                          -alt => "git",
3798                                          -class => "logo"}));
3799         }
3800         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3801         if (defined $project) {
3802                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3803                 if (defined $action) {
3804                         my $action_print = $action ;
3805                         if (defined $opts{-action_extra}) {
3806                                 $action_print = $cgi->a({-href => href(action=>$action)},
3807                                         $action);
3808                         }
3809                         print " / $action_print";
3810                 }
3811                 if (defined $opts{-action_extra}) {
3812                         print " / $opts{-action_extra}";
3813                 }
3814                 print "\n";
3815         }
3816         print "</div>\n";
3817
3818         my $have_search = gitweb_check_feature('search');
3819         if (defined $project && $have_search) {
3820                 if (!defined $searchtext) {
3821                         $searchtext = "";
3822                 }
3823                 my $search_hash;
3824                 if (defined $hash_base) {
3825                         $search_hash = $hash_base;
3826                 } elsif (defined $hash) {
3827                         $search_hash = $hash;
3828                 } else {
3829                         $search_hash = "HEAD";
3830                 }
3831                 my $action = $my_uri;
3832                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3833                 if ($use_pathinfo) {
3834                         $action .= "/".esc_url($project);
3835                 }
3836                 print $cgi->startform(-method => "get", -action => $action) .
3837                       "<div class=\"search\">\n" .
3838                       (!$use_pathinfo &&
3839                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3840                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3841                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3842                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3843                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3844                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3845                       " search:\n",
3846                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3847                       "<span title=\"Extended regular expression\">" .
3848                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3849                                      -checked => $search_use_regexp) .
3850                       "</span>" .
3851                       "</div>" .
3852                       $cgi->end_form() . "\n";
3853         }
3854 }
3855
3856 sub git_footer_html {
3857         my $feed_class = 'rss_logo';
3858
3859         print "<div class=\"page_footer\">\n";
3860         if (defined $project) {
3861                 my $descr = git_get_project_description($project);
3862                 if (defined $descr) {
3863                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3864                 }
3865
3866                 my %href_params = get_feed_info();
3867                 if (!%href_params) {
3868                         $feed_class .= ' generic';
3869                 }
3870                 $href_params{'-title'} ||= 'log';
3871
3872                 foreach my $format (qw(RSS Atom)) {
3873                         $href_params{'action'} = lc($format);
3874                         print $cgi->a({-href => href(%href_params),
3875                                       -title => "$href_params{'-title'} $format feed",
3876                                       -class => $feed_class}, $format)."\n";
3877                 }
3878
3879         } else {
3880                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3881                               -class => $feed_class}, "OPML") . " ";
3882                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3883                               -class => $feed_class}, "TXT") . "\n";
3884         }
3885         print "</div>\n"; # class="page_footer"
3886
3887         if (defined $t0 && gitweb_check_feature('timed')) {
3888                 print "<div id=\"generating_info\">\n";
3889                 print 'This page took '.
3890                       '<span id="generating_time" class="time_span">'.
3891                       tv_interval($t0, [ gettimeofday() ]).
3892                       ' seconds </span>'.
3893                       ' and '.
3894                       '<span id="generating_cmd">'.
3895                       $number_of_git_cmds.
3896                       '</span> git commands '.
3897                       " to generate.\n";
3898                 print "</div>\n"; # class="page_footer"
3899         }
3900
3901         if (defined $site_footer && -f $site_footer) {
3902                 insert_file($site_footer);
3903         }
3904
3905         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3906         if (defined $action &&
3907             $action eq 'blame_incremental') {
3908                 print qq!<script type="text/javascript">\n!.
3909                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3910                       qq!           "!. href() .qq!");\n!.
3911                       qq!</script>\n!;
3912         } else {
3913                 my ($jstimezone, $tz_cookie, $datetime_class) =
3914                         gitweb_get_feature('javascript-timezone');
3915
3916                 print qq!<script type="text/javascript">\n!.
3917                       qq!window.onload = function () {\n!;
3918                 if (gitweb_check_feature('javascript-actions')) {
3919                         print qq!       fixLinks();\n!;
3920                 }
3921                 if ($jstimezone && $tz_cookie && $datetime_class) {
3922                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
3923                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
3924                 }
3925                 print qq!};\n!.
3926                       qq!</script>\n!;
3927         }
3928
3929         print "</body>\n" .
3930               "</html>";
3931 }
3932
3933 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3934 # Example: die_error(404, 'Hash not found')
3935 # By convention, use the following status codes (as defined in RFC 2616):
3936 # 400: Invalid or missing CGI parameters, or
3937 #      requested object exists but has wrong type.
3938 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3939 #      this server or project.
3940 # 404: Requested object/revision/project doesn't exist.
3941 # 500: The server isn't configured properly, or
3942 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3943 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3944 # 503: The server is currently unavailable (because it is overloaded,
3945 #      or down for maintenance).  Generally, this is a temporary state.
3946 sub die_error {
3947         my $status = shift || 500;
3948         my $error = esc_html(shift) || "Internal Server Error";
3949         my $extra = shift;
3950         my %opts = @_;
3951
3952         my %http_responses = (
3953                 400 => '400 Bad Request',
3954                 403 => '403 Forbidden',
3955                 404 => '404 Not Found',
3956                 500 => '500 Internal Server Error',
3957                 503 => '503 Service Unavailable',
3958         );
3959         git_header_html($http_responses{$status}, undef, %opts);
3960         print <<EOF;
3961 <div class="page_body">
3962 <br /><br />
3963 $status - $error
3964 <br />
3965 EOF
3966         if (defined $extra) {
3967                 print "<hr />\n" .
3968                       "$extra\n";
3969         }
3970         print "</div>\n";
3971
3972         git_footer_html();
3973         goto DONE_GITWEB
3974                 unless ($opts{'-error_handler'});
3975 }
3976
3977 ## ----------------------------------------------------------------------
3978 ## functions printing or outputting HTML: navigation
3979
3980 sub git_print_page_nav {
3981         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3982         $extra = '' if !defined $extra; # pager or formats
3983
3984         my @navs = qw(summary shortlog log commit commitdiff tree);
3985         if ($suppress) {
3986                 @navs = grep { $_ ne $suppress } @navs;
3987         }
3988
3989         my %arg = map { $_ => {action=>$_} } @navs;
3990         if (defined $head) {
3991                 for (qw(commit commitdiff)) {
3992                         $arg{$_}{'hash'} = $head;
3993                 }
3994                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3995                         for (qw(shortlog log)) {
3996                                 $arg{$_}{'hash'} = $head;
3997                         }
3998                 }
3999         }
4000
4001         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4002         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4003
4004         my @actions = gitweb_get_feature('actions');
4005         my %repl = (
4006                 '%' => '%',
4007                 'n' => $project,         # project name
4008                 'f' => $git_dir,         # project path within filesystem
4009                 'h' => $treehead || '',  # current hash ('h' parameter)
4010                 'b' => $treebase || '',  # hash base ('hb' parameter)
4011         );
4012         while (@actions) {
4013                 my ($label, $link, $pos) = splice(@actions,0,3);
4014                 # insert
4015                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4016                 # munch munch
4017                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4018                 $arg{$label}{'_href'} = $link;
4019         }
4020
4021         print "<div class=\"page_nav\">\n" .
4022                 (join " | ",
4023                  map { $_ eq $current ?
4024                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4025                  } @navs);
4026         print "<br/>\n$extra<br/>\n" .
4027               "</div>\n";
4028 }
4029
4030 # returns a submenu for the nagivation of the refs views (tags, heads,
4031 # remotes) with the current view disabled and the remotes view only
4032 # available if the feature is enabled
4033 sub format_ref_views {
4034         my ($current) = @_;
4035         my @ref_views = qw{tags heads};
4036         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4037         return join " | ", map {
4038                 $_ eq $current ? $_ :
4039                 $cgi->a({-href => href(action=>$_)}, $_)
4040         } @ref_views
4041 }
4042
4043 sub format_paging_nav {
4044         my ($action, $page, $has_next_link) = @_;
4045         my $paging_nav;
4046
4047
4048         if ($page > 0) {
4049                 $paging_nav .=
4050                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4051                         " &sdot; " .
4052                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4053                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4054         } else {
4055                 $paging_nav .= "first &sdot; prev";
4056         }
4057
4058         if ($has_next_link) {
4059                 $paging_nav .= " &sdot; " .
4060                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4061                                  -accesskey => "n", -title => "Alt-n"}, "next");
4062         } else {
4063                 $paging_nav .= " &sdot; next";
4064         }
4065
4066         return $paging_nav;
4067 }
4068
4069 ## ......................................................................
4070 ## functions printing or outputting HTML: div
4071
4072 sub git_print_header_div {
4073         my ($action, $title, $hash, $hash_base) = @_;
4074         my %args = ();
4075
4076         $args{'action'} = $action;
4077         $args{'hash'} = $hash if $hash;
4078         $args{'hash_base'} = $hash_base if $hash_base;
4079
4080         print "<div class=\"header\">\n" .
4081               $cgi->a({-href => href(%args), -class => "title"},
4082               $title ? $title : $action) .
4083               "\n</div>\n";
4084 }
4085
4086 sub format_repo_url {
4087         my ($name, $url) = @_;
4088         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4089 }
4090
4091 # Group output by placing it in a DIV element and adding a header.
4092 # Options for start_div() can be provided by passing a hash reference as the
4093 # first parameter to the function.
4094 # Options to git_print_header_div() can be provided by passing an array
4095 # reference. This must follow the options to start_div if they are present.
4096 # The content can be a scalar, which is output as-is, a scalar reference, which
4097 # is output after html escaping, an IO handle passed either as *handle or
4098 # *handle{IO}, or a function reference. In the latter case all following
4099 # parameters will be taken as argument to the content function call.
4100 sub git_print_section {
4101         my ($div_args, $header_args, $content);
4102         my $arg = shift;
4103         if (ref($arg) eq 'HASH') {
4104                 $div_args = $arg;
4105                 $arg = shift;
4106         }
4107         if (ref($arg) eq 'ARRAY') {
4108                 $header_args = $arg;
4109                 $arg = shift;
4110         }
4111         $content = $arg;
4112
4113         print $cgi->start_div($div_args);
4114         git_print_header_div(@$header_args);
4115
4116         if (ref($content) eq 'CODE') {
4117                 $content->(@_);
4118         } elsif (ref($content) eq 'SCALAR') {
4119                 print esc_html($$content);
4120         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4121                 print <$content>;
4122         } elsif (!ref($content) && defined($content)) {
4123                 print $content;
4124         }
4125
4126         print $cgi->end_div;
4127 }
4128
4129 sub format_timestamp_html {
4130         my $date = shift;
4131         my $strtime = $date->{'rfc2822'};
4132
4133         my (undef, undef, $datetime_class) =
4134                 gitweb_get_feature('javascript-timezone');
4135         if ($datetime_class) {
4136                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4137         }
4138
4139         my $localtime_format = '(%02d:%02d %s)';
4140         if ($date->{'hour_local'} < 6) {
4141                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4142         }
4143         $strtime .= ' ' .
4144                     sprintf($localtime_format,
4145                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4146
4147         return $strtime;
4148 }
4149
4150 # Outputs the author name and date in long form
4151 sub git_print_authorship {
4152         my $co = shift;
4153         my %opts = @_;
4154         my $tag = $opts{-tag} || 'div';
4155         my $author = $co->{'author_name'};
4156
4157         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4158         print "<$tag class=\"author_date\">" .
4159               format_search_author($author, "author", esc_html($author)) .
4160               " [".format_timestamp_html(\%ad)."]".
4161               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4162               "</$tag>\n";
4163 }
4164
4165 # Outputs table rows containing the full author or committer information,
4166 # in the format expected for 'commit' view (& similar).
4167 # Parameters are a commit hash reference, followed by the list of people
4168 # to output information for. If the list is empty it defaults to both
4169 # author and committer.
4170 sub git_print_authorship_rows {
4171         my $co = shift;
4172         # too bad we can't use @people = @_ || ('author', 'committer')
4173         my @people = @_;
4174         @people = ('author', 'committer') unless @people;
4175         foreach my $who (@people) {
4176                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4177                 print "<tr><td>$who</td><td>" .
4178                       format_search_author($co->{"${who}_name"}, $who,
4179                                            esc_html($co->{"${who}_name"})) . " " .
4180                       format_search_author($co->{"${who}_email"}, $who,
4181                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4182                       "</td><td rowspan=\"2\">" .
4183                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4184                       "</td></tr>\n" .
4185                       "<tr>" .
4186                       "<td></td><td>" .
4187                       format_timestamp_html(\%wd) .
4188                       "</td>" .
4189                       "</tr>\n";
4190         }
4191 }
4192
4193 sub git_print_page_path {
4194         my $name = shift;
4195         my $type = shift;
4196         my $hb = shift;
4197
4198
4199         print "<div class=\"page_path\">";
4200         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4201                       -title => 'tree root'}, to_utf8("[$project]"));
4202         print " / ";
4203         if (defined $name) {
4204                 my @dirname = split '/', $name;
4205                 my $basename = pop @dirname;
4206                 my $fullname = '';
4207
4208                 foreach my $dir (@dirname) {
4209                         $fullname .= ($fullname ? '/' : '') . $dir;
4210                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4211                                                      hash_base=>$hb),
4212                                       -title => $fullname}, esc_path($dir));
4213                         print " / ";
4214                 }
4215                 if (defined $type && $type eq 'blob') {
4216                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4217                                                      hash_base=>$hb),
4218                                       -title => $name}, esc_path($basename));
4219                 } elsif (defined $type && $type eq 'tree') {
4220                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4221                                                      hash_base=>$hb),
4222                                       -title => $name}, esc_path($basename));
4223                         print " / ";
4224                 } else {
4225                         print esc_path($basename);
4226                 }
4227         }
4228         print "<br/></div>\n";
4229 }
4230
4231 sub git_print_log {
4232         my $log = shift;
4233         my %opts = @_;
4234
4235         if ($opts{'-remove_title'}) {
4236                 # remove title, i.e. first line of log
4237                 shift @$log;
4238         }
4239         # remove leading empty lines
4240         while (defined $log->[0] && $log->[0] eq "") {
4241                 shift @$log;
4242         }
4243
4244         # print log
4245         my $signoff = 0;
4246         my $empty = 0;
4247         foreach my $line (@$log) {
4248                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4249                         $signoff = 1;
4250                         $empty = 0;
4251                         if (! $opts{'-remove_signoff'}) {
4252                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4253                                 next;
4254                         } else {
4255                                 # remove signoff lines
4256                                 next;
4257                         }
4258                 } else {
4259                         $signoff = 0;
4260                 }
4261
4262                 # print only one empty line
4263                 # do not print empty line after signoff
4264                 if ($line eq "") {
4265                         next if ($empty || $signoff);
4266                         $empty = 1;
4267                 } else {
4268                         $empty = 0;
4269                 }
4270
4271                 print format_log_line_html($line) . "<br/>\n";
4272         }
4273
4274         if ($opts{'-final_empty_line'}) {
4275                 # end with single empty line
4276                 print "<br/>\n" unless $empty;
4277         }
4278 }
4279
4280 # return link target (what link points to)
4281 sub git_get_link_target {
4282         my $hash = shift;
4283         my $link_target;
4284
4285         # read link
4286         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4287                 or return;
4288         {
4289                 local $/ = undef;
4290                 $link_target = <$fd>;
4291         }
4292         close $fd
4293                 or return;
4294
4295         return $link_target;
4296 }
4297
4298 # given link target, and the directory (basedir) the link is in,
4299 # return target of link relative to top directory (top tree);
4300 # return undef if it is not possible (including absolute links).
4301 sub normalize_link_target {
4302         my ($link_target, $basedir) = @_;
4303
4304         # absolute symlinks (beginning with '/') cannot be normalized
4305         return if (substr($link_target, 0, 1) eq '/');
4306
4307         # normalize link target to path from top (root) tree (dir)
4308         my $path;
4309         if ($basedir) {
4310                 $path = $basedir . '/' . $link_target;
4311         } else {
4312                 # we are in top (root) tree (dir)
4313                 $path = $link_target;
4314         }
4315
4316         # remove //, /./, and /../
4317         my @path_parts;
4318         foreach my $part (split('/', $path)) {
4319                 # discard '.' and ''
4320                 next if (!$part || $part eq '.');
4321                 # handle '..'
4322                 if ($part eq '..') {
4323                         if (@path_parts) {
4324                                 pop @path_parts;
4325                         } else {
4326                                 # link leads outside repository (outside top dir)
4327                                 return;
4328                         }
4329                 } else {
4330                         push @path_parts, $part;
4331                 }
4332         }
4333         $path = join('/', @path_parts);
4334
4335         return $path;
4336 }
4337
4338 # print tree entry (row of git_tree), but without encompassing <tr> element
4339 sub git_print_tree_entry {
4340         my ($t, $basedir, $hash_base, $have_blame) = @_;
4341
4342         my %base_key = ();
4343         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4344
4345         # The format of a table row is: mode list link.  Where mode is
4346         # the mode of the entry, list is the name of the entry, an href,
4347         # and link is the action links of the entry.
4348
4349         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4350         if (exists $t->{'size'}) {
4351                 print "<td class=\"size\">$t->{'size'}</td>\n";
4352         }
4353         if ($t->{'type'} eq "blob") {
4354                 print "<td class=\"list\">" .
4355                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4356                                                file_name=>"$basedir$t->{'name'}", %base_key),
4357                                 -class => "list"}, esc_path($t->{'name'}));
4358                 if (S_ISLNK(oct $t->{'mode'})) {
4359                         my $link_target = git_get_link_target($t->{'hash'});
4360                         if ($link_target) {
4361                                 my $norm_target = normalize_link_target($link_target, $basedir);
4362                                 if (defined $norm_target) {
4363                                         print " -> " .
4364                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4365                                                                      file_name=>$norm_target),
4366                                                        -title => $norm_target}, esc_path($link_target));
4367                                 } else {
4368                                         print " -> " . esc_path($link_target);
4369                                 }
4370                         }
4371                 }
4372                 print "</td>\n";
4373                 print "<td class=\"link\">";
4374                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4375                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4376                               "blob");
4377                 if ($have_blame) {
4378                         print " | " .
4379                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4380                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4381                                       "blame");
4382                 }
4383                 if (defined $hash_base) {
4384                         print " | " .
4385                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4386                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4387                                       "history");
4388                 }
4389                 print " | " .
4390                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4391                                                file_name=>"$basedir$t->{'name'}")},
4392                                 "raw");
4393                 print "</td>\n";
4394
4395         } elsif ($t->{'type'} eq "tree") {
4396                 print "<td class=\"list\">";
4397                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4398                                              file_name=>"$basedir$t->{'name'}",
4399                                              %base_key)},
4400                               esc_path($t->{'name'}));
4401                 print "</td>\n";
4402                 print "<td class=\"link\">";
4403                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4404                                              file_name=>"$basedir$t->{'name'}",
4405                                              %base_key)},
4406                               "tree");
4407                 if (defined $hash_base) {
4408                         print " | " .
4409                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4410                                                      file_name=>"$basedir$t->{'name'}")},
4411                                       "history");
4412                 }
4413                 print "</td>\n";
4414         } else {
4415                 # unknown object: we can only present history for it
4416                 # (this includes 'commit' object, i.e. submodule support)
4417                 print "<td class=\"list\">" .
4418                       esc_path($t->{'name'}) .
4419                       "</td>\n";
4420                 print "<td class=\"link\">";
4421                 if (defined $hash_base) {
4422                         print $cgi->a({-href => href(action=>"history",
4423                                                      hash_base=>$hash_base,
4424                                                      file_name=>"$basedir$t->{'name'}")},
4425                                       "history");
4426                 }
4427                 print "</td>\n";
4428         }
4429 }
4430
4431 ## ......................................................................
4432 ## functions printing large fragments of HTML
4433
4434 # get pre-image filenames for merge (combined) diff
4435 sub fill_from_file_info {
4436         my ($diff, @parents) = @_;
4437
4438         $diff->{'from_file'} = [ ];
4439         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4440         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4441                 if ($diff->{'status'}[$i] eq 'R' ||
4442                     $diff->{'status'}[$i] eq 'C') {
4443                         $diff->{'from_file'}[$i] =
4444                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4445                 }
4446         }
4447
4448         return $diff;
4449 }
4450
4451 # is current raw difftree line of file deletion
4452 sub is_deleted {
4453         my $diffinfo = shift;
4454
4455         return $diffinfo->{'to_id'} eq ('0' x 40);
4456 }
4457
4458 # does patch correspond to [previous] difftree raw line
4459 # $diffinfo  - hashref of parsed raw diff format
4460 # $patchinfo - hashref of parsed patch diff format
4461 #              (the same keys as in $diffinfo)
4462 sub is_patch_split {
4463         my ($diffinfo, $patchinfo) = @_;
4464
4465         return defined $diffinfo && defined $patchinfo
4466                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4467 }
4468
4469
4470 sub git_difftree_body {
4471         my ($difftree, $hash, @parents) = @_;
4472         my ($parent) = $parents[0];
4473         my $have_blame = gitweb_check_feature('blame');
4474         print "<div class=\"list_head\">\n";
4475         if ($#{$difftree} > 10) {
4476                 print(($#{$difftree} + 1) . " files changed:\n");
4477         }
4478         print "</div>\n";
4479
4480         print "<table class=\"" .
4481               (@parents > 1 ? "combined " : "") .
4482               "diff_tree\">\n";
4483
4484         # header only for combined diff in 'commitdiff' view
4485         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4486         if ($has_header) {
4487                 # table header
4488                 print "<thead><tr>\n" .
4489                        "<th></th><th></th>\n"; # filename, patchN link
4490                 for (my $i = 0; $i < @parents; $i++) {
4491                         my $par = $parents[$i];
4492                         print "<th>" .
4493                               $cgi->a({-href => href(action=>"commitdiff",
4494                                                      hash=>$hash, hash_parent=>$par),
4495                                        -title => 'commitdiff to parent number ' .
4496                                                   ($i+1) . ': ' . substr($par,0,7)},
4497                                       $i+1) .
4498                               "&nbsp;</th>\n";
4499                 }
4500                 print "</tr></thead>\n<tbody>\n";
4501         }
4502
4503         my $alternate = 1;
4504         my $patchno = 0;
4505         foreach my $line (@{$difftree}) {
4506                 my $diff = parsed_difftree_line($line);
4507
4508                 if ($alternate) {
4509                         print "<tr class=\"dark\">\n";
4510                 } else {
4511                         print "<tr class=\"light\">\n";
4512                 }
4513                 $alternate ^= 1;
4514
4515                 if (exists $diff->{'nparents'}) { # combined diff
4516
4517                         fill_from_file_info($diff, @parents)
4518                                 unless exists $diff->{'from_file'};
4519
4520                         if (!is_deleted($diff)) {
4521                                 # file exists in the result (child) commit
4522                                 print "<td>" .
4523                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4524                                                              file_name=>$diff->{'to_file'},
4525                                                              hash_base=>$hash),
4526                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4527                                       "</td>\n";
4528                         } else {
4529                                 print "<td>" .
4530                                       esc_path($diff->{'to_file'}) .
4531                                       "</td>\n";
4532                         }
4533
4534                         if ($action eq 'commitdiff') {
4535                                 # link to patch
4536                                 $patchno++;
4537                                 print "<td class=\"link\">" .
4538                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4539                                               "patch") .
4540                                       " | " .
4541                                       "</td>\n";
4542                         }
4543
4544                         my $has_history = 0;
4545                         my $not_deleted = 0;
4546                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4547                                 my $hash_parent = $parents[$i];
4548                                 my $from_hash = $diff->{'from_id'}[$i];
4549                                 my $from_path = $diff->{'from_file'}[$i];
4550                                 my $status = $diff->{'status'}[$i];
4551
4552                                 $has_history ||= ($status ne 'A');
4553                                 $not_deleted ||= ($status ne 'D');
4554
4555                                 if ($status eq 'A') {
4556                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4557                                 } elsif ($status eq 'D') {
4558                                         print "<td class=\"link\">" .
4559                                               $cgi->a({-href => href(action=>"blob",
4560                                                                      hash_base=>$hash,
4561                                                                      hash=>$from_hash,
4562                                                                      file_name=>$from_path)},
4563                                                       "blob" . ($i+1)) .
4564                                               " | </td>\n";
4565                                 } else {
4566                                         if ($diff->{'to_id'} eq $from_hash) {
4567                                                 print "<td class=\"link nochange\">";
4568                                         } else {
4569                                                 print "<td class=\"link\">";
4570                                         }
4571                                         print $cgi->a({-href => href(action=>"blobdiff",
4572                                                                      hash=>$diff->{'to_id'},
4573                                                                      hash_parent=>$from_hash,
4574                                                                      hash_base=>$hash,
4575                                                                      hash_parent_base=>$hash_parent,
4576                                                                      file_name=>$diff->{'to_file'},
4577                                                                      file_parent=>$from_path)},
4578                                                       "diff" . ($i+1)) .
4579                                               " | </td>\n";
4580                                 }
4581                         }
4582
4583                         print "<td class=\"link\">";
4584                         if ($not_deleted) {
4585                                 print $cgi->a({-href => href(action=>"blob",
4586                                                              hash=>$diff->{'to_id'},
4587                                                              file_name=>$diff->{'to_file'},
4588                                                              hash_base=>$hash)},
4589                                               "blob");
4590                                 print " | " if ($has_history);
4591                         }
4592                         if ($has_history) {
4593                                 print $cgi->a({-href => href(action=>"history",
4594                                                              file_name=>$diff->{'to_file'},
4595                                                              hash_base=>$hash)},
4596                                               "history");
4597                         }
4598                         print "</td>\n";
4599
4600                         print "</tr>\n";
4601                         next; # instead of 'else' clause, to avoid extra indent
4602                 }
4603                 # else ordinary diff
4604
4605                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4606                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4607                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4608                         $to_mode_oct = oct $diff->{'to_mode'};
4609                         if (S_ISREG($to_mode_oct)) { # only for regular file
4610                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4611                         }
4612                         $to_file_type = file_type($diff->{'to_mode'});
4613                 }
4614                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4615                         $from_mode_oct = oct $diff->{'from_mode'};
4616                         if (S_ISREG($from_mode_oct)) { # only for regular file
4617                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4618                         }
4619                         $from_file_type = file_type($diff->{'from_mode'});
4620                 }
4621
4622                 if ($diff->{'status'} eq "A") { # created
4623                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4624                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4625                         $mode_chng   .= "]</span>";
4626                         print "<td>";
4627                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4628                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4629                                       -class => "list"}, esc_path($diff->{'file'}));
4630                         print "</td>\n";
4631                         print "<td>$mode_chng</td>\n";
4632                         print "<td class=\"link\">";
4633                         if ($action eq 'commitdiff') {
4634                                 # link to patch
4635                                 $patchno++;
4636                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4637                                               "patch") .
4638                                       " | ";
4639                         }
4640                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4641                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4642                                       "blob");
4643                         print "</td>\n";
4644
4645                 } elsif ($diff->{'status'} eq "D") { # deleted
4646                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4647                         print "<td>";
4648                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4649                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4650                                        -class => "list"}, esc_path($diff->{'file'}));
4651                         print "</td>\n";
4652                         print "<td>$mode_chng</td>\n";
4653                         print "<td class=\"link\">";
4654                         if ($action eq 'commitdiff') {
4655                                 # link to patch
4656                                 $patchno++;
4657                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4658                                               "patch") .
4659                                       " | ";
4660                         }
4661                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4662                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4663                                       "blob") . " | ";
4664                         if ($have_blame) {
4665                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4666                                                              file_name=>$diff->{'file'})},
4667                                               "blame") . " | ";
4668                         }
4669                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4670                                                      file_name=>$diff->{'file'})},
4671                                       "history");
4672                         print "</td>\n";
4673
4674                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4675                         my $mode_chnge = "";
4676                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4677                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4678                                 if ($from_file_type ne $to_file_type) {
4679                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4680                                 }
4681                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4682                                         if ($from_mode_str && $to_mode_str) {
4683                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4684                                         } elsif ($to_mode_str) {
4685                                                 $mode_chnge .= " mode: $to_mode_str";
4686                                         }
4687                                 }
4688                                 $mode_chnge .= "]</span>\n";
4689                         }
4690                         print "<td>";
4691                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4692                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4693                                       -class => "list"}, esc_path($diff->{'file'}));
4694                         print "</td>\n";
4695                         print "<td>$mode_chnge</td>\n";
4696                         print "<td class=\"link\">";
4697                         if ($action eq 'commitdiff') {
4698                                 # link to patch
4699                                 $patchno++;
4700                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4701                                               "patch") .
4702                                       " | ";
4703                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4704                                 # "commit" view and modified file (not onlu mode changed)
4705                                 print $cgi->a({-href => href(action=>"blobdiff",
4706                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4707                                                              hash_base=>$hash, hash_parent_base=>$parent,
4708                                                              file_name=>$diff->{'file'})},
4709                                               "diff") .
4710                                       " | ";
4711                         }
4712                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4713                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4714                                        "blob") . " | ";
4715                         if ($have_blame) {
4716                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4717                                                              file_name=>$diff->{'file'})},
4718                                               "blame") . " | ";
4719                         }
4720                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4721                                                      file_name=>$diff->{'file'})},
4722                                       "history");
4723                         print "</td>\n";
4724
4725                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4726                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4727                         my $nstatus = $status_name{$diff->{'status'}};
4728                         my $mode_chng = "";
4729                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4730                                 # mode also for directories, so we cannot use $to_mode_str
4731                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4732                         }
4733                         print "<td>" .
4734                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4735                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4736                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4737                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4738                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4739                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4740                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4741                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4742                               "<td class=\"link\">";
4743                         if ($action eq 'commitdiff') {
4744                                 # link to patch
4745                                 $patchno++;
4746                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4747                                               "patch") .
4748                                       " | ";
4749                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4750                                 # "commit" view and modified file (not only pure rename or copy)
4751                                 print $cgi->a({-href => href(action=>"blobdiff",
4752                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4753                                                              hash_base=>$hash, hash_parent_base=>$parent,
4754                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4755                                               "diff") .
4756                                       " | ";
4757                         }
4758                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4759                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4760                                       "blob") . " | ";
4761                         if ($have_blame) {
4762                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4763                                                              file_name=>$diff->{'to_file'})},
4764                                               "blame") . " | ";
4765                         }
4766                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4767                                                     file_name=>$diff->{'to_file'})},
4768                                       "history");
4769                         print "</td>\n";
4770
4771                 } # we should not encounter Unmerged (U) or Unknown (X) status
4772                 print "</tr>\n";
4773         }
4774         print "</tbody>" if $has_header;
4775         print "</table>\n";
4776 }
4777
4778 sub git_patchset_body {
4779         my ($fd, $difftree, $hash, @hash_parents) = @_;
4780         my ($hash_parent) = $hash_parents[0];
4781
4782         my $is_combined = (@hash_parents > 1);
4783         my $patch_idx = 0;
4784         my $patch_number = 0;
4785         my $patch_line;
4786         my $diffinfo;
4787         my $to_name;
4788         my (%from, %to);
4789
4790         print "<div class=\"patchset\">\n";
4791
4792         # skip to first patch
4793         while ($patch_line = <$fd>) {
4794                 chomp $patch_line;
4795
4796                 last if ($patch_line =~ m/^diff /);
4797         }
4798
4799  PATCH:
4800         while ($patch_line) {
4801
4802                 # parse "git diff" header line
4803                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4804                         # $1 is from_name, which we do not use
4805                         $to_name = unquote($2);
4806                         $to_name =~ s!^b/!!;
4807                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4808                         # $1 is 'cc' or 'combined', which we do not use
4809                         $to_name = unquote($2);
4810                 } else {
4811                         $to_name = undef;
4812                 }
4813
4814                 # check if current patch belong to current raw line
4815                 # and parse raw git-diff line if needed
4816                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4817                         # this is continuation of a split patch
4818                         print "<div class=\"patch cont\">\n";
4819                 } else {
4820                         # advance raw git-diff output if needed
4821                         $patch_idx++ if defined $diffinfo;
4822
4823                         # read and prepare patch information
4824                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4825
4826                         # compact combined diff output can have some patches skipped
4827                         # find which patch (using pathname of result) we are at now;
4828                         if ($is_combined) {
4829                                 while ($to_name ne $diffinfo->{'to_file'}) {
4830                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4831                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4832                                               "</div>\n";  # class="patch"
4833
4834                                         $patch_idx++;
4835                                         $patch_number++;
4836
4837                                         last if $patch_idx > $#$difftree;
4838                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4839                                 }
4840                         }
4841
4842                         # modifies %from, %to hashes
4843                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4844
4845                         # this is first patch for raw difftree line with $patch_idx index
4846                         # we index @$difftree array from 0, but number patches from 1
4847                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4848                 }
4849
4850                 # git diff header
4851                 #assert($patch_line =~ m/^diff /) if DEBUG;
4852                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4853                 $patch_number++;
4854                 # print "git diff" header
4855                 print format_git_diff_header_line($patch_line, $diffinfo,
4856                                                   \%from, \%to);
4857
4858                 # print extended diff header
4859                 print "<div class=\"diff extended_header\">\n";
4860         EXTENDED_HEADER:
4861                 while ($patch_line = <$fd>) {
4862                         chomp $patch_line;
4863
4864                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4865
4866                         print format_extended_diff_header_line($patch_line, $diffinfo,
4867                                                                \%from, \%to);
4868                 }
4869                 print "</div>\n"; # class="diff extended_header"
4870
4871                 # from-file/to-file diff header
4872                 if (! $patch_line) {
4873                         print "</div>\n"; # class="patch"
4874                         last PATCH;
4875                 }
4876                 next PATCH if ($patch_line =~ m/^diff /);
4877                 #assert($patch_line =~ m/^---/) if DEBUG;
4878
4879                 my $last_patch_line = $patch_line;
4880                 $patch_line = <$fd>;
4881                 chomp $patch_line;
4882                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4883
4884                 print format_diff_from_to_header($last_patch_line, $patch_line,
4885                                                  $diffinfo, \%from, \%to,
4886                                                  @hash_parents);
4887
4888                 # the patch itself
4889         LINE:
4890                 while ($patch_line = <$fd>) {
4891                         chomp $patch_line;
4892
4893                         next PATCH if ($patch_line =~ m/^diff /);
4894
4895                         print format_diff_line($patch_line, \%from, \%to);
4896                 }
4897
4898         } continue {
4899                 print "</div>\n"; # class="patch"
4900         }
4901
4902         # for compact combined (--cc) format, with chunk and patch simplification
4903         # the patchset might be empty, but there might be unprocessed raw lines
4904         for (++$patch_idx if $patch_number > 0;
4905              $patch_idx < @$difftree;
4906              ++$patch_idx) {
4907                 # read and prepare patch information
4908                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4909
4910                 # generate anchor for "patch" links in difftree / whatchanged part
4911                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4912                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4913                       "</div>\n";  # class="patch"
4914
4915                 $patch_number++;
4916         }
4917
4918         if ($patch_number == 0) {
4919                 if (@hash_parents > 1) {
4920                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4921                 } else {
4922                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4923                 }
4924         }
4925
4926         print "</div>\n"; # class="patchset"
4927 }
4928
4929 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4930
4931 # fills project list info (age, description, owner, category, forks)
4932 # for each project in the list, removing invalid projects from
4933 # returned list
4934 # NOTE: modifies $projlist, but does not remove entries from it
4935 sub fill_project_list_info {
4936         my $projlist = shift;
4937         my @projects;
4938
4939         my $show_ctags = gitweb_check_feature('ctags');
4940  PROJECT:
4941         foreach my $pr (@$projlist) {
4942                 my (@activity) = git_get_last_activity($pr->{'path'});
4943                 unless (@activity) {
4944                         next PROJECT;
4945                 }
4946                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4947                 if (!defined $pr->{'descr'}) {
4948                         my $descr = git_get_project_description($pr->{'path'}) || "";
4949                         $descr = to_utf8($descr);
4950                         $pr->{'descr_long'} = $descr;
4951                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4952                 }
4953                 if (!defined $pr->{'owner'}) {
4954                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4955                 }
4956                 if ($show_ctags) {
4957                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4958                 }
4959                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4960                         my $cat = git_get_project_category($pr->{'path'}) ||
4961                                                            $project_list_default_category;
4962                         $pr->{'category'} = to_utf8($cat);
4963                 }
4964
4965                 push @projects, $pr;
4966         }
4967
4968         return @projects;
4969 }
4970
4971 sub sort_projects_list {
4972         my ($projlist, $order) = @_;
4973         my @projects;
4974
4975         my %order_info = (
4976                 project => { key => 'path', type => 'str' },
4977                 descr => { key => 'descr_long', type => 'str' },
4978                 owner => { key => 'owner', type => 'str' },
4979                 age => { key => 'age', type => 'num' }
4980         );
4981         my $oi = $order_info{$order};
4982         return @$projlist unless defined $oi;
4983         if ($oi->{'type'} eq 'str') {
4984                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4985         } else {
4986                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4987         }
4988
4989         return @projects;
4990 }
4991
4992 # returns a hash of categories, containing the list of project
4993 # belonging to each category
4994 sub build_projlist_by_category {
4995         my ($projlist, $from, $to) = @_;
4996         my %categories;
4997
4998         $from = 0 unless defined $from;
4999         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5000
5001         for (my $i = $from; $i <= $to; $i++) {
5002                 my $pr = $projlist->[$i];
5003                 push @{$categories{ $pr->{'category'} }}, $pr;
5004         }
5005
5006         return wantarray ? %categories : \%categories;
5007 }
5008
5009 # print 'sort by' <th> element, generating 'sort by $name' replay link
5010 # if that order is not selected
5011 sub print_sort_th {
5012         print format_sort_th(@_);
5013 }
5014
5015 sub format_sort_th {
5016         my ($name, $order, $header) = @_;
5017         my $sort_th = "";
5018         $header ||= ucfirst($name);
5019
5020         if ($order eq $name) {
5021                 $sort_th .= "<th>$header</th>\n";
5022         } else {
5023                 $sort_th .= "<th>" .
5024                             $cgi->a({-href => href(-replay=>1, order=>$name),
5025                                      -class => "header"}, $header) .
5026                             "</th>\n";
5027         }
5028
5029         return $sort_th;
5030 }
5031
5032 sub git_project_list_rows {
5033         my ($projlist, $from, $to, $check_forks) = @_;
5034
5035         $from = 0 unless defined $from;
5036         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5037
5038         my $alternate = 1;
5039         for (my $i = $from; $i <= $to; $i++) {
5040                 my $pr = $projlist->[$i];
5041
5042                 if ($alternate) {
5043                         print "<tr class=\"dark\">\n";
5044                 } else {
5045                         print "<tr class=\"light\">\n";
5046                 }
5047                 $alternate ^= 1;
5048
5049                 if ($check_forks) {
5050                         print "<td>";
5051                         if ($pr->{'forks'}) {
5052                                 my $nforks = scalar @{$pr->{'forks'}};
5053                                 if ($nforks > 0) {
5054                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5055                                                        -title => "$nforks forks"}, "+");
5056                                 } else {
5057                                         print $cgi->span({-title => "$nforks forks"}, "+");
5058                                 }
5059                         }
5060                         print "</td>\n";
5061                 }
5062                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5063                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5064                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5065                                         -class => "list", -title => $pr->{'descr_long'}},
5066                                         esc_html($pr->{'descr'})) . "</td>\n" .
5067                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5068                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5069                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5070                       "<td class=\"link\">" .
5071                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5072                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5073                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5074                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5075                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5076                       "</td>\n" .
5077                       "</tr>\n";
5078         }
5079 }
5080
5081 sub git_project_list_body {
5082         # actually uses global variable $project
5083         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5084         my @projects = @$projlist;
5085
5086         my $check_forks = gitweb_check_feature('forks');
5087         my $show_ctags  = gitweb_check_feature('ctags');
5088         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5089         $check_forks = undef
5090                 if ($tagfilter || $searchtext);
5091
5092         # filtering out forks before filling info allows to do less work
5093         @projects = filter_forks_from_projects_list(\@projects)
5094                 if ($check_forks);
5095         @projects = fill_project_list_info(\@projects);
5096         # searching projects require filling to be run before it
5097         @projects = search_projects_list(\@projects,
5098                                          'searchtext' => $searchtext,
5099                                          'tagfilter'  => $tagfilter)
5100                 if ($tagfilter || $searchtext);
5101
5102         $order ||= $default_projects_order;
5103         $from = 0 unless defined $from;
5104         $to = $#projects if (!defined $to || $#projects < $to);
5105
5106         # short circuit
5107         if ($from > $to) {
5108                 print "<center>\n".
5109                       "<b>No such projects found</b><br />\n".
5110                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5111                       "</center>\n<br />\n";
5112                 return;
5113         }
5114
5115         @projects = sort_projects_list(\@projects, $order);
5116
5117         if ($show_ctags) {
5118                 my $ctags = git_gather_all_ctags(\@projects);
5119                 my $cloud = git_populate_project_tagcloud($ctags);
5120                 print git_show_project_tagcloud($cloud, 64);
5121         }
5122
5123         print "<table class=\"project_list\">\n";
5124         unless ($no_header) {
5125                 print "<tr>\n";
5126                 if ($check_forks) {
5127                         print "<th></th>\n";
5128                 }
5129                 print_sort_th('project', $order, 'Project');
5130                 print_sort_th('descr', $order, 'Description');
5131                 print_sort_th('owner', $order, 'Owner');
5132                 print_sort_th('age', $order, 'Last Change');
5133                 print "<th></th>\n" . # for links
5134                       "</tr>\n";
5135         }
5136
5137         if ($projects_list_group_categories) {
5138                 # only display categories with projects in the $from-$to window
5139                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5140                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5141                 foreach my $cat (sort keys %categories) {
5142                         unless ($cat eq "") {
5143                                 print "<tr>\n";
5144                                 if ($check_forks) {
5145                                         print "<td></td>\n";
5146                                 }
5147                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5148                                 print "</tr>\n";
5149                         }
5150
5151                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5152                 }
5153         } else {
5154                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5155         }
5156
5157         if (defined $extra) {
5158                 print "<tr>\n";
5159                 if ($check_forks) {
5160                         print "<td></td>\n";
5161                 }
5162                 print "<td colspan=\"5\">$extra</td>\n" .
5163                       "</tr>\n";
5164         }
5165         print "</table>\n";
5166 }
5167
5168 sub git_log_body {
5169         # uses global variable $project
5170         my ($commitlist, $from, $to, $refs, $extra) = @_;
5171
5172         $from = 0 unless defined $from;
5173         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5174
5175         for (my $i = 0; $i <= $to; $i++) {
5176                 my %co = %{$commitlist->[$i]};
5177                 next if !%co;
5178                 my $commit = $co{'id'};
5179                 my $ref = format_ref_marker($refs, $commit);
5180                 git_print_header_div('commit',
5181                                "<span class=\"age\">$co{'age_string'}</span>" .
5182                                esc_html($co{'title'}) . $ref,
5183                                $commit);
5184                 print "<div class=\"title_text\">\n" .
5185                       "<div class=\"log_link\">\n" .
5186                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5187                       " | " .
5188                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5189                       " | " .
5190                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5191                       "<br/>\n" .
5192                       "</div>\n";
5193                       git_print_authorship(\%co, -tag => 'span');
5194                       print "<br/>\n</div>\n";
5195
5196                 print "<div class=\"log_body\">\n";
5197                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5198                 print "</div>\n";
5199         }
5200         if ($extra) {
5201                 print "<div class=\"page_nav\">\n";
5202                 print "$extra\n";
5203                 print "</div>\n";
5204         }
5205 }
5206
5207 sub git_shortlog_body {
5208         # uses global variable $project
5209         my ($commitlist, $from, $to, $refs, $extra) = @_;
5210
5211         $from = 0 unless defined $from;
5212         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5213
5214         print "<table class=\"shortlog\">\n";
5215         my $alternate = 1;
5216         for (my $i = $from; $i <= $to; $i++) {
5217                 my %co = %{$commitlist->[$i]};
5218                 my $commit = $co{'id'};
5219                 my $ref = format_ref_marker($refs, $commit);
5220                 if ($alternate) {
5221                         print "<tr class=\"dark\">\n";
5222                 } else {
5223                         print "<tr class=\"light\">\n";
5224                 }
5225                 $alternate ^= 1;
5226                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5227                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5228                       format_author_html('td', \%co, 10) . "<td>";
5229                 print format_subject_html($co{'title'}, $co{'title_short'},
5230                                           href(action=>"commit", hash=>$commit), $ref);
5231                 print "</td>\n" .
5232                       "<td class=\"link\">" .
5233                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5234                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5235                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5236                 my $snapshot_links = format_snapshot_links($commit);
5237                 if (defined $snapshot_links) {
5238                         print " | " . $snapshot_links;
5239                 }
5240                 print "</td>\n" .
5241                       "</tr>\n";
5242         }
5243         if (defined $extra) {
5244                 print "<tr>\n" .
5245                       "<td colspan=\"4\">$extra</td>\n" .
5246                       "</tr>\n";
5247         }
5248         print "</table>\n";
5249 }
5250
5251 sub git_history_body {
5252         # Warning: assumes constant type (blob or tree) during history
5253         my ($commitlist, $from, $to, $refs, $extra,
5254             $file_name, $file_hash, $ftype) = @_;
5255
5256         $from = 0 unless defined $from;
5257         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5258
5259         print "<table class=\"history\">\n";
5260         my $alternate = 1;
5261         for (my $i = $from; $i <= $to; $i++) {
5262                 my %co = %{$commitlist->[$i]};
5263                 if (!%co) {
5264                         next;
5265                 }
5266                 my $commit = $co{'id'};
5267
5268                 my $ref = format_ref_marker($refs, $commit);
5269
5270                 if ($alternate) {
5271                         print "<tr class=\"dark\">\n";
5272                 } else {
5273                         print "<tr class=\"light\">\n";
5274                 }
5275                 $alternate ^= 1;
5276                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5277         # shortlog:   format_author_html('td', \%co, 10)
5278                       format_author_html('td', \%co, 15, 3) . "<td>";
5279                 # originally git_history used chop_str($co{'title'}, 50)
5280                 print format_subject_html($co{'title'}, $co{'title_short'},
5281                                           href(action=>"commit", hash=>$commit), $ref);
5282                 print "</td>\n" .
5283                       "<td class=\"link\">" .
5284                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5285                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5286
5287                 if ($ftype eq 'blob') {
5288                         my $blob_current = $file_hash;
5289                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5290                         if (defined $blob_current && defined $blob_parent &&
5291                                         $blob_current ne $blob_parent) {
5292                                 print " | " .
5293                                         $cgi->a({-href => href(action=>"blobdiff",
5294                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5295                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5296                                                                file_name=>$file_name)},
5297                                                 "diff to current");
5298                         }
5299                 }
5300                 print "</td>\n" .
5301                       "</tr>\n";
5302         }
5303         if (defined $extra) {
5304                 print "<tr>\n" .
5305                       "<td colspan=\"4\">$extra</td>\n" .
5306                       "</tr>\n";
5307         }
5308         print "</table>\n";
5309 }
5310
5311 sub git_tags_body {
5312         # uses global variable $project
5313         my ($taglist, $from, $to, $extra) = @_;
5314         $from = 0 unless defined $from;
5315         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5316
5317         print "<table class=\"tags\">\n";
5318         my $alternate = 1;
5319         for (my $i = $from; $i <= $to; $i++) {
5320                 my $entry = $taglist->[$i];
5321                 my %tag = %$entry;
5322                 my $comment = $tag{'subject'};
5323                 my $comment_short;
5324                 if (defined $comment) {
5325                         $comment_short = chop_str($comment, 30, 5);
5326                 }
5327                 if ($alternate) {
5328                         print "<tr class=\"dark\">\n";
5329                 } else {
5330                         print "<tr class=\"light\">\n";
5331                 }
5332                 $alternate ^= 1;
5333                 if (defined $tag{'age'}) {
5334                         print "<td><i>$tag{'age'}</i></td>\n";
5335                 } else {
5336                         print "<td></td>\n";
5337                 }
5338                 print "<td>" .
5339                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5340                                -class => "list name"}, esc_html($tag{'name'})) .
5341                       "</td>\n" .
5342                       "<td>";
5343                 if (defined $comment) {
5344                         print format_subject_html($comment, $comment_short,
5345                                                   href(action=>"tag", hash=>$tag{'id'}));
5346                 }
5347                 print "</td>\n" .
5348                       "<td class=\"selflink\">";
5349                 if ($tag{'type'} eq "tag") {
5350                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5351                 } else {
5352                         print "&nbsp;";
5353                 }
5354                 print "</td>\n" .
5355                       "<td class=\"link\">" . " | " .
5356                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5357                 if ($tag{'reftype'} eq "commit") {
5358                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5359                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5360                 } elsif ($tag{'reftype'} eq "blob") {
5361                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5362                 }
5363                 print "</td>\n" .
5364                       "</tr>";
5365         }
5366         if (defined $extra) {
5367                 print "<tr>\n" .
5368                       "<td colspan=\"5\">$extra</td>\n" .
5369                       "</tr>\n";
5370         }
5371         print "</table>\n";
5372 }
5373
5374 sub git_heads_body {
5375         # uses global variable $project
5376         my ($headlist, $head, $from, $to, $extra) = @_;
5377         $from = 0 unless defined $from;
5378         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5379
5380         print "<table class=\"heads\">\n";
5381         my $alternate = 1;
5382         for (my $i = $from; $i <= $to; $i++) {
5383                 my $entry = $headlist->[$i];
5384                 my %ref = %$entry;
5385                 my $curr = $ref{'id'} eq $head;
5386                 if ($alternate) {
5387                         print "<tr class=\"dark\">\n";
5388                 } else {
5389                         print "<tr class=\"light\">\n";
5390                 }
5391                 $alternate ^= 1;
5392                 print "<td><i>$ref{'age'}</i></td>\n" .
5393                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5394                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5395                                -class => "list name"},esc_html($ref{'name'})) .
5396                       "</td>\n" .
5397                       "<td class=\"link\">" .
5398                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5399                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5400                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5401                       "</td>\n" .
5402                       "</tr>";
5403         }
5404         if (defined $extra) {
5405                 print "<tr>\n" .
5406                       "<td colspan=\"3\">$extra</td>\n" .
5407                       "</tr>\n";
5408         }
5409         print "</table>\n";
5410 }
5411
5412 # Display a single remote block
5413 sub git_remote_block {
5414         my ($remote, $rdata, $limit, $head) = @_;
5415
5416         my $heads = $rdata->{'heads'};
5417         my $fetch = $rdata->{'fetch'};
5418         my $push = $rdata->{'push'};
5419
5420         my $urls_table = "<table class=\"projects_list\">\n" ;
5421
5422         if (defined $fetch) {
5423                 if ($fetch eq $push) {
5424                         $urls_table .= format_repo_url("URL", $fetch);
5425                 } else {
5426                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5427                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5428                 }
5429         } elsif (defined $push) {
5430                 $urls_table .= format_repo_url("Push URL", $push);
5431         } else {
5432                 $urls_table .= format_repo_url("", "No remote URL");
5433         }
5434
5435         $urls_table .= "</table>\n";
5436
5437         my $dots;
5438         if (defined $limit && $limit < @$heads) {
5439                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5440         }
5441
5442         print $urls_table;
5443         git_heads_body($heads, $head, 0, $limit, $dots);
5444 }
5445
5446 # Display a list of remote names with the respective fetch and push URLs
5447 sub git_remotes_list {
5448         my ($remotedata, $limit) = @_;
5449         print "<table class=\"heads\">\n";
5450         my $alternate = 1;
5451         my @remotes = sort keys %$remotedata;
5452
5453         my $limited = $limit && $limit < @remotes;
5454
5455         $#remotes = $limit - 1 if $limited;
5456
5457         while (my $remote = shift @remotes) {
5458                 my $rdata = $remotedata->{$remote};
5459                 my $fetch = $rdata->{'fetch'};
5460                 my $push = $rdata->{'push'};
5461                 if ($alternate) {
5462                         print "<tr class=\"dark\">\n";
5463                 } else {
5464                         print "<tr class=\"light\">\n";
5465                 }
5466                 $alternate ^= 1;
5467                 print "<td>" .
5468                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5469                                -class=> "list name"},esc_html($remote)) .
5470                       "</td>";
5471                 print "<td class=\"link\">" .
5472                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5473                       " | " .
5474                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5475                       "</td>";
5476
5477                 print "</tr>\n";
5478         }
5479
5480         if ($limited) {
5481                 print "<tr>\n" .
5482                       "<td colspan=\"3\">" .
5483                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5484                       "</td>\n" . "</tr>\n";
5485         }
5486
5487         print "</table>";
5488 }
5489
5490 # Display remote heads grouped by remote, unless there are too many
5491 # remotes, in which case we only display the remote names
5492 sub git_remotes_body {
5493         my ($remotedata, $limit, $head) = @_;
5494         if ($limit and $limit < keys %$remotedata) {
5495                 git_remotes_list($remotedata, $limit);
5496         } else {
5497                 fill_remote_heads($remotedata);
5498                 while (my ($remote, $rdata) = each %$remotedata) {
5499                         git_print_section({-class=>"remote", -id=>$remote},
5500                                 ["remotes", $remote, $remote], sub {
5501                                         git_remote_block($remote, $rdata, $limit, $head);
5502                                 });
5503                 }
5504         }
5505 }
5506
5507 sub git_search_grep_body {
5508         my ($commitlist, $from, $to, $extra) = @_;
5509         $from = 0 unless defined $from;
5510         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5511
5512         print "<table class=\"commit_search\">\n";
5513         my $alternate = 1;
5514         for (my $i = $from; $i <= $to; $i++) {
5515                 my %co = %{$commitlist->[$i]};
5516                 if (!%co) {
5517                         next;
5518                 }
5519                 my $commit = $co{'id'};
5520                 if ($alternate) {
5521                         print "<tr class=\"dark\">\n";
5522                 } else {
5523                         print "<tr class=\"light\">\n";
5524                 }
5525                 $alternate ^= 1;
5526                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5527                       format_author_html('td', \%co, 15, 5) .
5528                       "<td>" .
5529                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5530                                -class => "list subject"},
5531                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5532                 my $comment = $co{'comment'};
5533                 foreach my $line (@$comment) {
5534                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5535                                 my ($lead, $match, $trail) = ($1, $2, $3);
5536                                 $match = chop_str($match, 70, 5, 'center');
5537                                 my $contextlen = int((80 - length($match))/2);
5538                                 $contextlen = 30 if ($contextlen > 30);
5539                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5540                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5541
5542                                 $lead  = esc_html($lead);
5543                                 $match = esc_html($match);
5544                                 $trail = esc_html($trail);
5545
5546                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5547                         }
5548                 }
5549                 print "</td>\n" .
5550                       "<td class=\"link\">" .
5551                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5552                       " | " .
5553                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5554                       " | " .
5555                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5556                 print "</td>\n" .
5557                       "</tr>\n";
5558         }
5559         if (defined $extra) {
5560                 print "<tr>\n" .
5561                       "<td colspan=\"3\">$extra</td>\n" .
5562                       "</tr>\n";
5563         }
5564         print "</table>\n";
5565 }
5566
5567 ## ======================================================================
5568 ## ======================================================================
5569 ## actions
5570
5571 sub git_project_list {
5572         my $order = $input_params{'order'};
5573         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5574                 die_error(400, "Unknown order parameter");
5575         }
5576
5577         my @list = git_get_projects_list();
5578         if (!@list) {
5579                 die_error(404, "No projects found");
5580         }
5581
5582         git_header_html();
5583         if (defined $home_text && -f $home_text) {
5584                 print "<div class=\"index_include\">\n";
5585                 insert_file($home_text);
5586                 print "</div>\n";
5587         }
5588         print $cgi->startform(-method => "get") .
5589               "<p class=\"projsearch\">Search:\n" .
5590               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5591               "</p>" .
5592               $cgi->end_form() . "\n";
5593         git_project_list_body(\@list, $order);
5594         git_footer_html();
5595 }
5596
5597 sub git_forks {
5598         my $order = $input_params{'order'};
5599         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5600                 die_error(400, "Unknown order parameter");
5601         }
5602
5603         my @list = git_get_projects_list($project);
5604         if (!@list) {
5605                 die_error(404, "No forks found");
5606         }
5607
5608         git_header_html();
5609         git_print_page_nav('','');
5610         git_print_header_div('summary', "$project forks");
5611         git_project_list_body(\@list, $order);
5612         git_footer_html();
5613 }
5614
5615 sub git_project_index {
5616         my @projects = git_get_projects_list();
5617         if (!@projects) {
5618                 die_error(404, "No projects found");
5619         }
5620
5621         print $cgi->header(
5622                 -type => 'text/plain',
5623                 -charset => 'utf-8',
5624                 -content_disposition => 'inline; filename="index.aux"');
5625
5626         foreach my $pr (@projects) {
5627                 if (!exists $pr->{'owner'}) {
5628                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5629                 }
5630
5631                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5632                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5633                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5634                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5635                 $path  =~ s/ /\+/g;
5636                 $owner =~ s/ /\+/g;
5637
5638                 print "$path $owner\n";
5639         }
5640 }
5641
5642 sub git_summary {
5643         my $descr = git_get_project_description($project) || "none";
5644         my %co = parse_commit("HEAD");
5645         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5646         my $head = $co{'id'};
5647         my $remote_heads = gitweb_check_feature('remote_heads');
5648
5649         my $owner = git_get_project_owner($project);
5650
5651         my $refs = git_get_references();
5652         # These get_*_list functions return one more to allow us to see if
5653         # there are more ...
5654         my @taglist  = git_get_tags_list(16);
5655         my @headlist = git_get_heads_list(16);
5656         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5657         my @forklist;
5658         my $check_forks = gitweb_check_feature('forks');
5659
5660         if ($check_forks) {
5661                 # find forks of a project
5662                 @forklist = git_get_projects_list($project);
5663                 # filter out forks of forks
5664                 @forklist = filter_forks_from_projects_list(\@forklist)
5665                         if (@forklist);
5666         }
5667
5668         git_header_html();
5669         git_print_page_nav('summary','', $head);
5670
5671         print "<div class=\"title\">&nbsp;</div>\n";
5672         print "<table class=\"projects_list\">\n" .
5673               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5674               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5675         if (defined $cd{'rfc2822'}) {
5676                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5677                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5678         }
5679
5680         # use per project git URL list in $projectroot/$project/cloneurl
5681         # or make project git URL from git base URL and project name
5682         my $url_tag = "URL";
5683         my @url_list = git_get_project_url_list($project);
5684         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5685         foreach my $git_url (@url_list) {
5686                 next unless $git_url;
5687                 print format_repo_url($url_tag, $git_url);
5688                 $url_tag = "";
5689         }
5690
5691         # Tag cloud
5692         my $show_ctags = gitweb_check_feature('ctags');
5693         if ($show_ctags) {
5694                 my $ctags = git_get_project_ctags($project);
5695                 if (%$ctags) {
5696                         # without ability to add tags, don't show if there are none
5697                         my $cloud = git_populate_project_tagcloud($ctags);
5698                         print "<tr id=\"metadata_ctags\">" .
5699                               "<td>content tags</td>" .
5700                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5701                               "</tr>\n";
5702                 }
5703         }
5704
5705         print "</table>\n";
5706
5707         # If XSS prevention is on, we don't include README.html.
5708         # TODO: Allow a readme in some safe format.
5709         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5710                 print "<div class=\"title\">readme</div>\n" .
5711                       "<div class=\"readme\">\n";
5712                 insert_file("$projectroot/$project/README.html");
5713                 print "\n</div>\n"; # class="readme"
5714         }
5715
5716         # we need to request one more than 16 (0..15) to check if
5717         # those 16 are all
5718         my @commitlist = $head ? parse_commits($head, 17) : ();
5719         if (@commitlist) {
5720                 git_print_header_div('shortlog');
5721                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5722                                   $#commitlist <=  15 ? undef :
5723                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5724         }
5725
5726         if (@taglist) {
5727                 git_print_header_div('tags');
5728                 git_tags_body(\@taglist, 0, 15,
5729                               $#taglist <=  15 ? undef :
5730                               $cgi->a({-href => href(action=>"tags")}, "..."));
5731         }
5732
5733         if (@headlist) {
5734                 git_print_header_div('heads');
5735                 git_heads_body(\@headlist, $head, 0, 15,
5736                                $#headlist <= 15 ? undef :
5737                                $cgi->a({-href => href(action=>"heads")}, "..."));
5738         }
5739
5740         if (%remotedata) {
5741                 git_print_header_div('remotes');
5742                 git_remotes_body(\%remotedata, 15, $head);
5743         }
5744
5745         if (@forklist) {
5746                 git_print_header_div('forks');
5747                 git_project_list_body(\@forklist, 'age', 0, 15,
5748                                       $#forklist <= 15 ? undef :
5749                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5750                                       'no_header');
5751         }
5752
5753         git_footer_html();
5754 }
5755
5756 sub git_tag {
5757         my %tag = parse_tag($hash);
5758
5759         if (! %tag) {
5760                 die_error(404, "Unknown tag object");
5761         }
5762
5763         my $head = git_get_head_hash($project);
5764         git_header_html();
5765         git_print_page_nav('','', $head,undef,$head);
5766         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5767         print "<div class=\"title_text\">\n" .
5768               "<table class=\"object_header\">\n" .
5769               "<tr>\n" .
5770               "<td>object</td>\n" .
5771               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5772                                $tag{'object'}) . "</td>\n" .
5773               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5774                                               $tag{'type'}) . "</td>\n" .
5775               "</tr>\n";
5776         if (defined($tag{'author'})) {
5777                 git_print_authorship_rows(\%tag, 'author');
5778         }
5779         print "</table>\n\n" .
5780               "</div>\n";
5781         print "<div class=\"page_body\">";
5782         my $comment = $tag{'comment'};
5783         foreach my $line (@$comment) {
5784                 chomp $line;
5785                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5786         }
5787         print "</div>\n";
5788         git_footer_html();
5789 }
5790
5791 sub git_blame_common {
5792         my $format = shift || 'porcelain';
5793         if ($format eq 'porcelain' && $cgi->param('js')) {
5794                 $format = 'incremental';
5795                 $action = 'blame_incremental'; # for page title etc
5796         }
5797
5798         # permissions
5799         gitweb_check_feature('blame')
5800                 or die_error(403, "Blame view not allowed");
5801
5802         # error checking
5803         die_error(400, "No file name given") unless $file_name;
5804         $hash_base ||= git_get_head_hash($project);
5805         die_error(404, "Couldn't find base commit") unless $hash_base;
5806         my %co = parse_commit($hash_base)
5807                 or die_error(404, "Commit not found");
5808         my $ftype = "blob";
5809         if (!defined $hash) {
5810                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5811                         or die_error(404, "Error looking up file");
5812         } else {
5813                 $ftype = git_get_type($hash);
5814                 if ($ftype !~ "blob") {
5815                         die_error(400, "Object is not a blob");
5816                 }
5817         }
5818
5819         my $fd;
5820         if ($format eq 'incremental') {
5821                 # get file contents (as base)
5822                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5823                         or die_error(500, "Open git-cat-file failed");
5824         } elsif ($format eq 'data') {
5825                 # run git-blame --incremental
5826                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5827                         $hash_base, "--", $file_name
5828                         or die_error(500, "Open git-blame --incremental failed");
5829         } else {
5830                 # run git-blame --porcelain
5831                 open $fd, "-|", git_cmd(), "blame", '-p',
5832                         $hash_base, '--', $file_name
5833                         or die_error(500, "Open git-blame --porcelain failed");
5834         }
5835
5836         # incremental blame data returns early
5837         if ($format eq 'data') {
5838                 print $cgi->header(
5839                         -type=>"text/plain", -charset => "utf-8",
5840                         -status=> "200 OK");
5841                 local $| = 1; # output autoflush
5842                 print while <$fd>;
5843                 close $fd
5844                         or print "ERROR $!\n";
5845
5846                 print 'END';
5847                 if (defined $t0 && gitweb_check_feature('timed')) {
5848                         print ' '.
5849                               tv_interval($t0, [ gettimeofday() ]).
5850                               ' '.$number_of_git_cmds;
5851                 }
5852                 print "\n";
5853
5854                 return;
5855         }
5856
5857         # page header
5858         git_header_html();
5859         my $formats_nav =
5860                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5861                         "blob") .
5862                 " | ";
5863         if ($format eq 'incremental') {
5864                 $formats_nav .=
5865                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5866                                 "blame") . " (non-incremental)";
5867         } else {
5868                 $formats_nav .=
5869                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5870                                 "blame") . " (incremental)";
5871         }
5872         $formats_nav .=
5873                 " | " .
5874                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5875                         "history") .
5876                 " | " .
5877                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5878                         "HEAD");
5879         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5880         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5881         git_print_page_path($file_name, $ftype, $hash_base);
5882
5883         # page body
5884         if ($format eq 'incremental') {
5885                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5886                       "This page requires JavaScript to run.\n Use ".
5887                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5888                               'this page').
5889                       " instead.\n".
5890                       "</b></center></div>\n</noscript>\n";
5891
5892                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5893         }
5894
5895         print qq!<div class="page_body">\n!;
5896         print qq!<div id="progress_info">... / ...</div>\n!
5897                 if ($format eq 'incremental');
5898         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5899               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5900               qq!<thead>\n!.
5901               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5902               qq!</thead>\n!.
5903               qq!<tbody>\n!;
5904
5905         my @rev_color = qw(light dark);
5906         my $num_colors = scalar(@rev_color);
5907         my $current_color = 0;
5908
5909         if ($format eq 'incremental') {
5910                 my $color_class = $rev_color[$current_color];
5911
5912                 #contents of a file
5913                 my $linenr = 0;
5914         LINE:
5915                 while (my $line = <$fd>) {
5916                         chomp $line;
5917                         $linenr++;
5918
5919                         print qq!<tr id="l$linenr" class="$color_class">!.
5920                               qq!<td class="sha1"><a href=""> </a></td>!.
5921                               qq!<td class="linenr">!.
5922                               qq!<a class="linenr" href="">$linenr</a></td>!;
5923                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5924                         print qq!</tr>\n!;
5925                 }
5926
5927         } else { # porcelain, i.e. ordinary blame
5928                 my %metainfo = (); # saves information about commits
5929
5930                 # blame data
5931         LINE:
5932                 while (my $line = <$fd>) {
5933                         chomp $line;
5934                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5935                         # no <lines in group> for subsequent lines in group of lines
5936                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5937                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5938                         if (!exists $metainfo{$full_rev}) {
5939                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5940                         }
5941                         my $meta = $metainfo{$full_rev};
5942                         my $data;
5943                         while ($data = <$fd>) {
5944                                 chomp $data;
5945                                 last if ($data =~ s/^\t//); # contents of line
5946                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5947                                         $meta->{$1} = $2 unless exists $meta->{$1};
5948                                 }
5949                                 if ($data =~ /^previous /) {
5950                                         $meta->{'nprevious'}++;
5951                                 }
5952                         }
5953                         my $short_rev = substr($full_rev, 0, 8);
5954                         my $author = $meta->{'author'};
5955                         my %date =
5956                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5957                         my $date = $date{'iso-tz'};
5958                         if ($group_size) {
5959                                 $current_color = ($current_color + 1) % $num_colors;
5960                         }
5961                         my $tr_class = $rev_color[$current_color];
5962                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5963                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5964                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5965                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5966                         if ($group_size) {
5967                                 print "<td class=\"sha1\"";
5968                                 print " title=\"". esc_html($author) . ", $date\"";
5969                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5970                                 print ">";
5971                                 print $cgi->a({-href => href(action=>"commit",
5972                                                              hash=>$full_rev,
5973                                                              file_name=>$file_name)},
5974                                               esc_html($short_rev));
5975                                 if ($group_size >= 2) {
5976                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5977                                         if (@author_initials) {
5978                                                 print "<br />" .
5979                                                       esc_html(join('', @author_initials));
5980                                                 #           or join('.', ...)
5981                                         }
5982                                 }
5983                                 print "</td>\n";
5984                         }
5985                         # 'previous' <sha1 of parent commit> <filename at commit>
5986                         if (exists $meta->{'previous'} &&
5987                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5988                                 $meta->{'parent'} = $1;
5989                                 $meta->{'file_parent'} = unquote($2);
5990                         }
5991                         my $linenr_commit =
5992                                 exists($meta->{'parent'}) ?
5993                                 $meta->{'parent'} : $full_rev;
5994                         my $linenr_filename =
5995                                 exists($meta->{'file_parent'}) ?
5996                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5997                         my $blamed = href(action => 'blame',
5998                                           file_name => $linenr_filename,
5999                                           hash_base => $linenr_commit);
6000                         print "<td class=\"linenr\">";
6001                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6002                                         -class => "linenr" },
6003                                       esc_html($lineno));
6004                         print "</td>";
6005                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6006                         print "</tr>\n";
6007                 } # end while
6008
6009         }
6010
6011         # footer
6012         print "</tbody>\n".
6013               "</table>\n"; # class="blame"
6014         print "</div>\n";   # class="blame_body"
6015         close $fd
6016                 or print "Reading blob failed\n";
6017
6018         git_footer_html();
6019 }
6020
6021 sub git_blame {
6022         git_blame_common();
6023 }
6024
6025 sub git_blame_incremental {
6026         git_blame_common('incremental');
6027 }
6028
6029 sub git_blame_data {
6030         git_blame_common('data');
6031 }
6032
6033 sub git_tags {
6034         my $head = git_get_head_hash($project);
6035         git_header_html();
6036         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6037         git_print_header_div('summary', $project);
6038
6039         my @tagslist = git_get_tags_list();
6040         if (@tagslist) {
6041                 git_tags_body(\@tagslist);
6042         }
6043         git_footer_html();
6044 }
6045
6046 sub git_heads {
6047         my $head = git_get_head_hash($project);
6048         git_header_html();
6049         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6050         git_print_header_div('summary', $project);
6051
6052         my @headslist = git_get_heads_list();
6053         if (@headslist) {
6054                 git_heads_body(\@headslist, $head);
6055         }
6056         git_footer_html();
6057 }
6058
6059 # used both for single remote view and for list of all the remotes
6060 sub git_remotes {
6061         gitweb_check_feature('remote_heads')
6062                 or die_error(403, "Remote heads view is disabled");
6063
6064         my $head = git_get_head_hash($project);
6065         my $remote = $input_params{'hash'};
6066
6067         my $remotedata = git_get_remotes_list($remote);
6068         die_error(500, "Unable to get remote information") unless defined $remotedata;
6069
6070         unless (%$remotedata) {
6071                 die_error(404, defined $remote ?
6072                         "Remote $remote not found" :
6073                         "No remotes found");
6074         }
6075
6076         git_header_html(undef, undef, -action_extra => $remote);
6077         git_print_page_nav('', '',  $head, undef, $head,
6078                 format_ref_views($remote ? '' : 'remotes'));
6079
6080         fill_remote_heads($remotedata);
6081         if (defined $remote) {
6082                 git_print_header_div('remotes', "$remote remote for $project");
6083                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6084         } else {
6085                 git_print_header_div('summary', "$project remotes");
6086                 git_remotes_body($remotedata, undef, $head);
6087         }
6088
6089         git_footer_html();
6090 }
6091
6092 sub git_blob_plain {
6093         my $type = shift;
6094         my $expires;
6095
6096         if (!defined $hash) {
6097                 if (defined $file_name) {
6098                         my $base = $hash_base || git_get_head_hash($project);
6099                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6100                                 or die_error(404, "Cannot find file");
6101                 } else {
6102                         die_error(400, "No file name defined");
6103                 }
6104         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6105                 # blobs defined by non-textual hash id's can be cached
6106                 $expires = "+1d";
6107         }
6108
6109         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6110                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6111
6112         # content-type (can include charset)
6113         $type = blob_contenttype($fd, $file_name, $type);
6114
6115         # "save as" filename, even when no $file_name is given
6116         my $save_as = "$hash";
6117         if (defined $file_name) {
6118                 $save_as = $file_name;
6119         } elsif ($type =~ m/^text\//) {
6120                 $save_as .= '.txt';
6121         }
6122
6123         # With XSS prevention on, blobs of all types except a few known safe
6124         # ones are served with "Content-Disposition: attachment" to make sure
6125         # they don't run in our security domain.  For certain image types,
6126         # blob view writes an <img> tag referring to blob_plain view, and we
6127         # want to be sure not to break that by serving the image as an
6128         # attachment (though Firefox 3 doesn't seem to care).
6129         my $sandbox = $prevent_xss &&
6130                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6131
6132         print $cgi->header(
6133                 -type => $type,
6134                 -expires => $expires,
6135                 -content_disposition =>
6136                         ($sandbox ? 'attachment' : 'inline')
6137                         . '; filename="' . $save_as . '"');
6138         local $/ = undef;
6139         binmode STDOUT, ':raw';
6140         print <$fd>;
6141         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6142         close $fd;
6143 }
6144
6145 sub git_blob {
6146         my $expires;
6147
6148         if (!defined $hash) {
6149                 if (defined $file_name) {
6150                         my $base = $hash_base || git_get_head_hash($project);
6151                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6152                                 or die_error(404, "Cannot find file");
6153                 } else {
6154                         die_error(400, "No file name defined");
6155                 }
6156         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6157                 # blobs defined by non-textual hash id's can be cached
6158                 $expires = "+1d";
6159         }
6160
6161         my $have_blame = gitweb_check_feature('blame');
6162         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6163                 or die_error(500, "Couldn't cat $file_name, $hash");
6164         my $mimetype = blob_mimetype($fd, $file_name);
6165         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6166         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6167                 close $fd;
6168                 return git_blob_plain($mimetype);
6169         }
6170         # we can have blame only for text/* mimetype
6171         $have_blame &&= ($mimetype =~ m!^text/!);
6172
6173         my $highlight = gitweb_check_feature('highlight');
6174         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6175         $fd = run_highlighter($fd, $highlight, $syntax)
6176                 if $syntax;
6177
6178         git_header_html(undef, $expires);
6179         my $formats_nav = '';
6180         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6181                 if (defined $file_name) {
6182                         if ($have_blame) {
6183                                 $formats_nav .=
6184                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6185                                                 "blame") .
6186                                         " | ";
6187                         }
6188                         $formats_nav .=
6189                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6190                                         "history") .
6191                                 " | " .
6192                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6193                                         "raw") .
6194                                 " | " .
6195                                 $cgi->a({-href => href(action=>"blob",
6196                                                        hash_base=>"HEAD", file_name=>$file_name)},
6197                                         "HEAD");
6198                 } else {
6199                         $formats_nav .=
6200                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6201                                         "raw");
6202                 }
6203                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6204                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6205         } else {
6206                 print "<div class=\"page_nav\">\n" .
6207                       "<br/><br/></div>\n" .
6208                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6209         }
6210         git_print_page_path($file_name, "blob", $hash_base);
6211         print "<div class=\"page_body\">\n";
6212         if ($mimetype =~ m!^image/!) {
6213                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6214                 if ($file_name) {
6215                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6216                 }
6217                 print qq! src="! .
6218                       href(action=>"blob_plain", hash=>$hash,
6219                            hash_base=>$hash_base, file_name=>$file_name) .
6220                       qq!" />\n!;
6221         } else {
6222                 my $nr;
6223                 while (my $line = <$fd>) {
6224                         chomp $line;
6225                         $nr++;
6226                         $line = untabify($line);
6227                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6228                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6229                 }
6230         }
6231         close $fd
6232                 or print "Reading blob failed.\n";
6233         print "</div>";
6234         git_footer_html();
6235 }
6236
6237 sub git_tree {
6238         if (!defined $hash_base) {
6239                 $hash_base = "HEAD";
6240         }
6241         if (!defined $hash) {
6242                 if (defined $file_name) {
6243                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6244                 } else {
6245                         $hash = $hash_base;
6246                 }
6247         }
6248         die_error(404, "No such tree") unless defined($hash);
6249
6250         my $show_sizes = gitweb_check_feature('show-sizes');
6251         my $have_blame = gitweb_check_feature('blame');
6252
6253         my @entries = ();
6254         {
6255                 local $/ = "\0";
6256                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6257                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6258                         or die_error(500, "Open git-ls-tree failed");
6259                 @entries = map { chomp; $_ } <$fd>;
6260                 close $fd
6261                         or die_error(404, "Reading tree failed");
6262         }
6263
6264         my $refs = git_get_references();
6265         my $ref = format_ref_marker($refs, $hash_base);
6266         git_header_html();
6267         my $basedir = '';
6268         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6269                 my @views_nav = ();
6270                 if (defined $file_name) {
6271                         push @views_nav,
6272                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6273                                         "history"),
6274                                 $cgi->a({-href => href(action=>"tree",
6275                                                        hash_base=>"HEAD", file_name=>$file_name)},
6276                                         "HEAD"),
6277                 }
6278                 my $snapshot_links = format_snapshot_links($hash);
6279                 if (defined $snapshot_links) {
6280                         # FIXME: Should be available when we have no hash base as well.
6281                         push @views_nav, $snapshot_links;
6282                 }
6283                 git_print_page_nav('tree','', $hash_base, undef, undef,
6284                                    join(' | ', @views_nav));
6285                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6286         } else {
6287                 undef $hash_base;
6288                 print "<div class=\"page_nav\">\n";
6289                 print "<br/><br/></div>\n";
6290                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6291         }
6292         if (defined $file_name) {
6293                 $basedir = $file_name;
6294                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6295                         $basedir .= '/';
6296                 }
6297                 git_print_page_path($file_name, 'tree', $hash_base);
6298         }
6299         print "<div class=\"page_body\">\n";
6300         print "<table class=\"tree\">\n";
6301         my $alternate = 1;
6302         # '..' (top directory) link if possible
6303         if (defined $hash_base &&
6304             defined $file_name && $file_name =~ m![^/]+$!) {
6305                 if ($alternate) {
6306                         print "<tr class=\"dark\">\n";
6307                 } else {
6308                         print "<tr class=\"light\">\n";
6309                 }
6310                 $alternate ^= 1;
6311
6312                 my $up = $file_name;
6313                 $up =~ s!/?[^/]+$!!;
6314                 undef $up unless $up;
6315                 # based on git_print_tree_entry
6316                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6317                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6318                 print '<td class="list">';
6319                 print $cgi->a({-href => href(action=>"tree",
6320                                              hash_base=>$hash_base,
6321                                              file_name=>$up)},
6322                               "..");
6323                 print "</td>\n";
6324                 print "<td class=\"link\"></td>\n";
6325
6326                 print "</tr>\n";
6327         }
6328         foreach my $line (@entries) {
6329                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6330
6331                 if ($alternate) {
6332                         print "<tr class=\"dark\">\n";
6333                 } else {
6334                         print "<tr class=\"light\">\n";
6335                 }
6336                 $alternate ^= 1;
6337
6338                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6339
6340                 print "</tr>\n";
6341         }
6342         print "</table>\n" .
6343               "</div>";
6344         git_footer_html();
6345 }
6346
6347 sub snapshot_name {
6348         my ($project, $hash) = @_;
6349
6350         # path/to/project.git  -> project
6351         # path/to/project/.git -> project
6352         my $name = to_utf8($project);
6353         $name =~ s,([^/])/*\.git$,$1,;
6354         $name = basename($name);
6355         # sanitize name
6356         $name =~ s/[[:cntrl:]]/?/g;
6357
6358         my $ver = $hash;
6359         if ($hash =~ /^[0-9a-fA-F]+$/) {
6360                 # shorten SHA-1 hash
6361                 my $full_hash = git_get_full_hash($project, $hash);
6362                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6363                         $ver = git_get_short_hash($project, $hash);
6364                 }
6365         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6366                 # tags don't need shortened SHA-1 hash
6367                 $ver = $1;
6368         } else {
6369                 # branches and other need shortened SHA-1 hash
6370                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6371                         $ver = $1;
6372                 }
6373                 $ver .= '-' . git_get_short_hash($project, $hash);
6374         }
6375         # in case of hierarchical branch names
6376         $ver =~ s!/!.!g;
6377
6378         # name = project-version_string
6379         $name = "$name-$ver";
6380
6381         return wantarray ? ($name, $name) : $name;
6382 }
6383
6384 sub git_snapshot {
6385         my $format = $input_params{'snapshot_format'};
6386         if (!@snapshot_fmts) {
6387                 die_error(403, "Snapshots not allowed");
6388         }
6389         # default to first supported snapshot format
6390         $format ||= $snapshot_fmts[0];
6391         if ($format !~ m/^[a-z0-9]+$/) {
6392                 die_error(400, "Invalid snapshot format parameter");
6393         } elsif (!exists($known_snapshot_formats{$format})) {
6394                 die_error(400, "Unknown snapshot format");
6395         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6396                 die_error(403, "Snapshot format not allowed");
6397         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6398                 die_error(403, "Unsupported snapshot format");
6399         }
6400
6401         my $type = git_get_type("$hash^{}");
6402         if (!$type) {
6403                 die_error(404, 'Object does not exist');
6404         }  elsif ($type eq 'blob') {
6405                 die_error(400, 'Object is not a tree-ish');
6406         }
6407
6408         my ($name, $prefix) = snapshot_name($project, $hash);
6409         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6410         my $cmd = quote_command(
6411                 git_cmd(), 'archive',
6412                 "--format=$known_snapshot_formats{$format}{'format'}",
6413                 "--prefix=$prefix/", $hash);
6414         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6415                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6416         }
6417
6418         $filename =~ s/(["\\])/\\$1/g;
6419         print $cgi->header(
6420                 -type => $known_snapshot_formats{$format}{'type'},
6421                 -content_disposition => 'inline; filename="' . $filename . '"',
6422                 -status => '200 OK');
6423
6424         open my $fd, "-|", $cmd
6425                 or die_error(500, "Execute git-archive failed");
6426         binmode STDOUT, ':raw';
6427         print <$fd>;
6428         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6429         close $fd;
6430 }
6431
6432 sub git_log_generic {
6433         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6434
6435         my $head = git_get_head_hash($project);
6436         if (!defined $base) {
6437                 $base = $head;
6438         }
6439         if (!defined $page) {
6440                 $page = 0;
6441         }
6442         my $refs = git_get_references();
6443
6444         my $commit_hash = $base;
6445         if (defined $parent) {
6446                 $commit_hash = "$parent..$base";
6447         }
6448         my @commitlist =
6449                 parse_commits($commit_hash, 101, (100 * $page),
6450                               defined $file_name ? ($file_name, "--full-history") : ());
6451
6452         my $ftype;
6453         if (!defined $file_hash && defined $file_name) {
6454                 # some commits could have deleted file in question,
6455                 # and not have it in tree, but one of them has to have it
6456                 for (my $i = 0; $i < @commitlist; $i++) {
6457                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6458                         last if defined $file_hash;
6459                 }
6460         }
6461         if (defined $file_hash) {
6462                 $ftype = git_get_type($file_hash);
6463         }
6464         if (defined $file_name && !defined $ftype) {
6465                 die_error(500, "Unknown type of object");
6466         }
6467         my %co;
6468         if (defined $file_name) {
6469                 %co = parse_commit($base)
6470                         or die_error(404, "Unknown commit object");
6471         }
6472
6473
6474         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6475         my $next_link = '';
6476         if ($#commitlist >= 100) {
6477                 $next_link =
6478                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6479                                  -accesskey => "n", -title => "Alt-n"}, "next");
6480         }
6481         my $patch_max = gitweb_get_feature('patches');
6482         if ($patch_max && !defined $file_name) {
6483                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6484                         $paging_nav .= " &sdot; " .
6485                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6486                                         "patches");
6487                 }
6488         }
6489
6490         git_header_html();
6491         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6492         if (defined $file_name) {
6493                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6494         } else {
6495                 git_print_header_div('summary', $project)
6496         }
6497         git_print_page_path($file_name, $ftype, $hash_base)
6498                 if (defined $file_name);
6499
6500         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6501                      $file_name, $file_hash, $ftype);
6502
6503         git_footer_html();
6504 }
6505
6506 sub git_log {
6507         git_log_generic('log', \&git_log_body,
6508                         $hash, $hash_parent);
6509 }
6510
6511 sub git_commit {
6512         $hash ||= $hash_base || "HEAD";
6513         my %co = parse_commit($hash)
6514             or die_error(404, "Unknown commit object");
6515
6516         my $parent  = $co{'parent'};
6517         my $parents = $co{'parents'}; # listref
6518
6519         # we need to prepare $formats_nav before any parameter munging
6520         my $formats_nav;
6521         if (!defined $parent) {
6522                 # --root commitdiff
6523                 $formats_nav .= '(initial)';
6524         } elsif (@$parents == 1) {
6525                 # single parent commit
6526                 $formats_nav .=
6527                         '(parent: ' .
6528                         $cgi->a({-href => href(action=>"commit",
6529                                                hash=>$parent)},
6530                                 esc_html(substr($parent, 0, 7))) .
6531                         ')';
6532         } else {
6533                 # merge commit
6534                 $formats_nav .=
6535                         '(merge: ' .
6536                         join(' ', map {
6537                                 $cgi->a({-href => href(action=>"commit",
6538                                                        hash=>$_)},
6539                                         esc_html(substr($_, 0, 7)));
6540                         } @$parents ) .
6541                         ')';
6542         }
6543         if (gitweb_check_feature('patches') && @$parents <= 1) {
6544                 $formats_nav .= " | " .
6545                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6546                                 "patch");
6547         }
6548
6549         if (!defined $parent) {
6550                 $parent = "--root";
6551         }
6552         my @difftree;
6553         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6554                 @diff_opts,
6555                 (@$parents <= 1 ? $parent : '-c'),
6556                 $hash, "--"
6557                 or die_error(500, "Open git-diff-tree failed");
6558         @difftree = map { chomp; $_ } <$fd>;
6559         close $fd or die_error(404, "Reading git-diff-tree failed");
6560
6561         # non-textual hash id's can be cached
6562         my $expires;
6563         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6564                 $expires = "+1d";
6565         }
6566         my $refs = git_get_references();
6567         my $ref = format_ref_marker($refs, $co{'id'});
6568
6569         git_header_html(undef, $expires);
6570         git_print_page_nav('commit', '',
6571                            $hash, $co{'tree'}, $hash,
6572                            $formats_nav);
6573
6574         if (defined $co{'parent'}) {
6575                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6576         } else {
6577                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6578         }
6579         print "<div class=\"title_text\">\n" .
6580               "<table class=\"object_header\">\n";
6581         git_print_authorship_rows(\%co);
6582         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6583         print "<tr>" .
6584               "<td>tree</td>" .
6585               "<td class=\"sha1\">" .
6586               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6587                        class => "list"}, $co{'tree'}) .
6588               "</td>" .
6589               "<td class=\"link\">" .
6590               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6591                       "tree");
6592         my $snapshot_links = format_snapshot_links($hash);
6593         if (defined $snapshot_links) {
6594                 print " | " . $snapshot_links;
6595         }
6596         print "</td>" .
6597               "</tr>\n";
6598
6599         foreach my $par (@$parents) {
6600                 print "<tr>" .
6601                       "<td>parent</td>" .
6602                       "<td class=\"sha1\">" .
6603                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6604                                class => "list"}, $par) .
6605                       "</td>" .
6606                       "<td class=\"link\">" .
6607                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6608                       " | " .
6609                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6610                       "</td>" .
6611                       "</tr>\n";
6612         }
6613         print "</table>".
6614               "</div>\n";
6615
6616         print "<div class=\"page_body\">\n";
6617         git_print_log($co{'comment'});
6618         print "</div>\n";
6619
6620         git_difftree_body(\@difftree, $hash, @$parents);
6621
6622         git_footer_html();
6623 }
6624
6625 sub git_object {
6626         # object is defined by:
6627         # - hash or hash_base alone
6628         # - hash_base and file_name
6629         my $type;
6630
6631         # - hash or hash_base alone
6632         if ($hash || ($hash_base && !defined $file_name)) {
6633                 my $object_id = $hash || $hash_base;
6634
6635                 open my $fd, "-|", quote_command(
6636                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6637                         or die_error(404, "Object does not exist");
6638                 $type = <$fd>;
6639                 chomp $type;
6640                 close $fd
6641                         or die_error(404, "Object does not exist");
6642
6643         # - hash_base and file_name
6644         } elsif ($hash_base && defined $file_name) {
6645                 $file_name =~ s,/+$,,;
6646
6647                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6648                         or die_error(404, "Base object does not exist");
6649
6650                 # here errors should not hapen
6651                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6652                         or die_error(500, "Open git-ls-tree failed");
6653                 my $line = <$fd>;
6654                 close $fd;
6655
6656                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6657                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6658                         die_error(404, "File or directory for given base does not exist");
6659                 }
6660                 $type = $2;
6661                 $hash = $3;
6662         } else {
6663                 die_error(400, "Not enough information to find object");
6664         }
6665
6666         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6667                                           hash=>$hash, hash_base=>$hash_base,
6668                                           file_name=>$file_name),
6669                              -status => '302 Found');
6670 }
6671
6672 sub git_blobdiff {
6673         my $format = shift || 'html';
6674
6675         my $fd;
6676         my @difftree;
6677         my %diffinfo;
6678         my $expires;
6679
6680         # preparing $fd and %diffinfo for git_patchset_body
6681         # new style URI
6682         if (defined $hash_base && defined $hash_parent_base) {
6683                 if (defined $file_name) {
6684                         # read raw output
6685                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6686                                 $hash_parent_base, $hash_base,
6687                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6688                                 or die_error(500, "Open git-diff-tree failed");
6689                         @difftree = map { chomp; $_ } <$fd>;
6690                         close $fd
6691                                 or die_error(404, "Reading git-diff-tree failed");
6692                         @difftree
6693                                 or die_error(404, "Blob diff not found");
6694
6695                 } elsif (defined $hash &&
6696                          $hash =~ /[0-9a-fA-F]{40}/) {
6697                         # try to find filename from $hash
6698
6699                         # read filtered raw output
6700                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6701                                 $hash_parent_base, $hash_base, "--"
6702                                 or die_error(500, "Open git-diff-tree failed");
6703                         @difftree =
6704                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6705                                 # $hash == to_id
6706                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6707                                 map { chomp; $_ } <$fd>;
6708                         close $fd
6709                                 or die_error(404, "Reading git-diff-tree failed");
6710                         @difftree
6711                                 or die_error(404, "Blob diff not found");
6712
6713                 } else {
6714                         die_error(400, "Missing one of the blob diff parameters");
6715                 }
6716
6717                 if (@difftree > 1) {
6718                         die_error(400, "Ambiguous blob diff specification");
6719                 }
6720
6721                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6722                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6723                 $file_name   ||= $diffinfo{'to_file'};
6724
6725                 $hash_parent ||= $diffinfo{'from_id'};
6726                 $hash        ||= $diffinfo{'to_id'};
6727
6728                 # non-textual hash id's can be cached
6729                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6730                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6731                         $expires = '+1d';
6732                 }
6733
6734                 # open patch output
6735                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6736                         '-p', ($format eq 'html' ? "--full-index" : ()),
6737                         $hash_parent_base, $hash_base,
6738                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6739                         or die_error(500, "Open git-diff-tree failed");
6740         }
6741
6742         # old/legacy style URI -- not generated anymore since 1.4.3.
6743         if (!%diffinfo) {
6744                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6745         }
6746
6747         # header
6748         if ($format eq 'html') {
6749                 my $formats_nav =
6750                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6751                                 "raw");
6752                 git_header_html(undef, $expires);
6753                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6754                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6755                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6756                 } else {
6757                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6758                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6759                 }
6760                 if (defined $file_name) {
6761                         git_print_page_path($file_name, "blob", $hash_base);
6762                 } else {
6763                         print "<div class=\"page_path\"></div>\n";
6764                 }
6765
6766         } elsif ($format eq 'plain') {
6767                 print $cgi->header(
6768                         -type => 'text/plain',
6769                         -charset => 'utf-8',
6770                         -expires => $expires,
6771                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6772
6773                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6774
6775         } else {
6776                 die_error(400, "Unknown blobdiff format");
6777         }
6778
6779         # patch
6780         if ($format eq 'html') {
6781                 print "<div class=\"page_body\">\n";
6782
6783                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6784                 close $fd;
6785
6786                 print "</div>\n"; # class="page_body"
6787                 git_footer_html();
6788
6789         } else {
6790                 while (my $line = <$fd>) {
6791                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6792                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6793
6794                         print $line;
6795
6796                         last if $line =~ m!^\+\+\+!;
6797                 }
6798                 local $/ = undef;
6799                 print <$fd>;
6800                 close $fd;
6801         }
6802 }
6803
6804 sub git_blobdiff_plain {
6805         git_blobdiff('plain');
6806 }
6807
6808 sub git_commitdiff {
6809         my %params = @_;
6810         my $format = $params{-format} || 'html';
6811
6812         my ($patch_max) = gitweb_get_feature('patches');
6813         if ($format eq 'patch') {
6814                 die_error(403, "Patch view not allowed") unless $patch_max;
6815         }
6816
6817         $hash ||= $hash_base || "HEAD";
6818         my %co = parse_commit($hash)
6819             or die_error(404, "Unknown commit object");
6820
6821         # choose format for commitdiff for merge
6822         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6823                 $hash_parent = '--cc';
6824         }
6825         # we need to prepare $formats_nav before almost any parameter munging
6826         my $formats_nav;
6827         if ($format eq 'html') {
6828                 $formats_nav =
6829                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6830                                 "raw");
6831                 if ($patch_max && @{$co{'parents'}} <= 1) {
6832                         $formats_nav .= " | " .
6833                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6834                                         "patch");
6835                 }
6836
6837                 if (defined $hash_parent &&
6838                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6839                         # commitdiff with two commits given
6840                         my $hash_parent_short = $hash_parent;
6841                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6842                                 $hash_parent_short = substr($hash_parent, 0, 7);
6843                         }
6844                         $formats_nav .=
6845                                 ' (from';
6846                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6847                                 if ($co{'parents'}[$i] eq $hash_parent) {
6848                                         $formats_nav .= ' parent ' . ($i+1);
6849                                         last;
6850                                 }
6851                         }
6852                         $formats_nav .= ': ' .
6853                                 $cgi->a({-href => href(action=>"commitdiff",
6854                                                        hash=>$hash_parent)},
6855                                         esc_html($hash_parent_short)) .
6856                                 ')';
6857                 } elsif (!$co{'parent'}) {
6858                         # --root commitdiff
6859                         $formats_nav .= ' (initial)';
6860                 } elsif (scalar @{$co{'parents'}} == 1) {
6861                         # single parent commit
6862                         $formats_nav .=
6863                                 ' (parent: ' .
6864                                 $cgi->a({-href => href(action=>"commitdiff",
6865                                                        hash=>$co{'parent'})},
6866                                         esc_html(substr($co{'parent'}, 0, 7))) .
6867                                 ')';
6868                 } else {
6869                         # merge commit
6870                         if ($hash_parent eq '--cc') {
6871                                 $formats_nav .= ' | ' .
6872                                         $cgi->a({-href => href(action=>"commitdiff",
6873                                                                hash=>$hash, hash_parent=>'-c')},
6874                                                 'combined');
6875                         } else { # $hash_parent eq '-c'
6876                                 $formats_nav .= ' | ' .
6877                                         $cgi->a({-href => href(action=>"commitdiff",
6878                                                                hash=>$hash, hash_parent=>'--cc')},
6879                                                 'compact');
6880                         }
6881                         $formats_nav .=
6882                                 ' (merge: ' .
6883                                 join(' ', map {
6884                                         $cgi->a({-href => href(action=>"commitdiff",
6885                                                                hash=>$_)},
6886                                                 esc_html(substr($_, 0, 7)));
6887                                 } @{$co{'parents'}} ) .
6888                                 ')';
6889                 }
6890         }
6891
6892         my $hash_parent_param = $hash_parent;
6893         if (!defined $hash_parent_param) {
6894                 # --cc for multiple parents, --root for parentless
6895                 $hash_parent_param =
6896                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6897         }
6898
6899         # read commitdiff
6900         my $fd;
6901         my @difftree;
6902         if ($format eq 'html') {
6903                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6904                         "--no-commit-id", "--patch-with-raw", "--full-index",
6905                         $hash_parent_param, $hash, "--"
6906                         or die_error(500, "Open git-diff-tree failed");
6907
6908                 while (my $line = <$fd>) {
6909                         chomp $line;
6910                         # empty line ends raw part of diff-tree output
6911                         last unless $line;
6912                         push @difftree, scalar parse_difftree_raw_line($line);
6913                 }
6914
6915         } elsif ($format eq 'plain') {
6916                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6917                         '-p', $hash_parent_param, $hash, "--"
6918                         or die_error(500, "Open git-diff-tree failed");
6919         } elsif ($format eq 'patch') {
6920                 # For commit ranges, we limit the output to the number of
6921                 # patches specified in the 'patches' feature.
6922                 # For single commits, we limit the output to a single patch,
6923                 # diverging from the git-format-patch default.
6924                 my @commit_spec = ();
6925                 if ($hash_parent) {
6926                         if ($patch_max > 0) {
6927                                 push @commit_spec, "-$patch_max";
6928                         }
6929                         push @commit_spec, '-n', "$hash_parent..$hash";
6930                 } else {
6931                         if ($params{-single}) {
6932                                 push @commit_spec, '-1';
6933                         } else {
6934                                 if ($patch_max > 0) {
6935                                         push @commit_spec, "-$patch_max";
6936                                 }
6937                                 push @commit_spec, "-n";
6938                         }
6939                         push @commit_spec, '--root', $hash;
6940                 }
6941                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6942                         '--encoding=utf8', '--stdout', @commit_spec
6943                         or die_error(500, "Open git-format-patch failed");
6944         } else {
6945                 die_error(400, "Unknown commitdiff format");
6946         }
6947
6948         # non-textual hash id's can be cached
6949         my $expires;
6950         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6951                 $expires = "+1d";
6952         }
6953
6954         # write commit message
6955         if ($format eq 'html') {
6956                 my $refs = git_get_references();
6957                 my $ref = format_ref_marker($refs, $co{'id'});
6958
6959                 git_header_html(undef, $expires);
6960                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6961                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6962                 print "<div class=\"title_text\">\n" .
6963                       "<table class=\"object_header\">\n";
6964                 git_print_authorship_rows(\%co);
6965                 print "</table>".
6966                       "</div>\n";
6967                 print "<div class=\"page_body\">\n";
6968                 if (@{$co{'comment'}} > 1) {
6969                         print "<div class=\"log\">\n";
6970                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6971                         print "</div>\n"; # class="log"
6972                 }
6973
6974         } elsif ($format eq 'plain') {
6975                 my $refs = git_get_references("tags");
6976                 my $tagname = git_get_rev_name_tags($hash);
6977                 my $filename = basename($project) . "-$hash.patch";
6978
6979                 print $cgi->header(
6980                         -type => 'text/plain',
6981                         -charset => 'utf-8',
6982                         -expires => $expires,
6983                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6984                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6985                 print "From: " . to_utf8($co{'author'}) . "\n";
6986                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6987                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6988
6989                 print "X-Git-Tag: $tagname\n" if $tagname;
6990                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6991
6992                 foreach my $line (@{$co{'comment'}}) {
6993                         print to_utf8($line) . "\n";
6994                 }
6995                 print "---\n\n";
6996         } elsif ($format eq 'patch') {
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         }
7005
7006         # write patch
7007         if ($format eq 'html') {
7008                 my $use_parents = !defined $hash_parent ||
7009                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7010                 git_difftree_body(\@difftree, $hash,
7011                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7012                 print "<br/>\n";
7013
7014                 git_patchset_body($fd, \@difftree, $hash,
7015                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7016                 close $fd;
7017                 print "</div>\n"; # class="page_body"
7018                 git_footer_html();
7019
7020         } elsif ($format eq 'plain') {
7021                 local $/ = undef;
7022                 print <$fd>;
7023                 close $fd
7024                         or print "Reading git-diff-tree failed\n";
7025         } elsif ($format eq 'patch') {
7026                 local $/ = undef;
7027                 print <$fd>;
7028                 close $fd
7029                         or print "Reading git-format-patch failed\n";
7030         }
7031 }
7032
7033 sub git_commitdiff_plain {
7034         git_commitdiff(-format => 'plain');
7035 }
7036
7037 # format-patch-style patches
7038 sub git_patch {
7039         git_commitdiff(-format => 'patch', -single => 1);
7040 }
7041
7042 sub git_patches {
7043         git_commitdiff(-format => 'patch');
7044 }
7045
7046 sub git_history {
7047         git_log_generic('history', \&git_history_body,
7048                         $hash_base, $hash_parent_base,
7049                         $file_name, $hash);
7050 }
7051
7052 sub git_search {
7053         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7054         if (!defined $searchtext) {
7055                 die_error(400, "Text field is empty");
7056         }
7057         if (!defined $hash) {
7058                 $hash = git_get_head_hash($project);
7059         }
7060         my %co = parse_commit($hash);
7061         if (!%co) {
7062                 die_error(404, "Unknown commit object");
7063         }
7064         if (!defined $page) {
7065                 $page = 0;
7066         }
7067
7068         $searchtype ||= 'commit';
7069         if ($searchtype eq 'pickaxe') {
7070                 # pickaxe may take all resources of your box and run for several minutes
7071                 # with every query - so decide by yourself how public you make this feature
7072                 gitweb_check_feature('pickaxe')
7073                     or die_error(403, "Pickaxe is disabled");
7074         }
7075         if ($searchtype eq 'grep') {
7076                 gitweb_check_feature('grep')
7077                     or die_error(403, "Grep is disabled");
7078         }
7079
7080         git_header_html();
7081
7082         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7083                 my $greptype;
7084                 if ($searchtype eq 'commit') {
7085                         $greptype = "--grep=";
7086                 } elsif ($searchtype eq 'author') {
7087                         $greptype = "--author=";
7088                 } elsif ($searchtype eq 'committer') {
7089                         $greptype = "--committer=";
7090                 }
7091                 $greptype .= $searchtext;
7092                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7093                                                $greptype, '--regexp-ignore-case',
7094                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7095
7096                 my $paging_nav = '';
7097                 if ($page > 0) {
7098                         $paging_nav .=
7099                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7100                                                        searchtext=>$searchtext,
7101                                                        searchtype=>$searchtype)},
7102                                         "first");
7103                         $paging_nav .= " &sdot; " .
7104                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7105                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7106                 } else {
7107                         $paging_nav .= "first";
7108                         $paging_nav .= " &sdot; prev";
7109                 }
7110                 my $next_link = '';
7111                 if ($#commitlist >= 100) {
7112                         $next_link =
7113                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7114                                          -accesskey => "n", -title => "Alt-n"}, "next");
7115                         $paging_nav .= " &sdot; $next_link";
7116                 } else {
7117                         $paging_nav .= " &sdot; next";
7118                 }
7119
7120                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7121                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7122                 if ($page == 0 && !@commitlist) {
7123                         print "<p>No match.</p>\n";
7124                 } else {
7125                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7126                 }
7127         }
7128
7129         if ($searchtype eq 'pickaxe') {
7130                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7131                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7132
7133                 print "<table class=\"pickaxe search\">\n";
7134                 my $alternate = 1;
7135                 local $/ = "\n";
7136                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7137                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7138                         ($search_use_regexp ? '--pickaxe-regex' : ());
7139                 undef %co;
7140                 my @files;
7141                 while (my $line = <$fd>) {
7142                         chomp $line;
7143                         next unless $line;
7144
7145                         my %set = parse_difftree_raw_line($line);
7146                         if (defined $set{'commit'}) {
7147                                 # finish previous commit
7148                                 if (%co) {
7149                                         print "</td>\n" .
7150                                               "<td class=\"link\">" .
7151                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7152                                               " | " .
7153                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7154                                         print "</td>\n" .
7155                                               "</tr>\n";
7156                                 }
7157
7158                                 if ($alternate) {
7159                                         print "<tr class=\"dark\">\n";
7160                                 } else {
7161                                         print "<tr class=\"light\">\n";
7162                                 }
7163                                 $alternate ^= 1;
7164                                 %co = parse_commit($set{'commit'});
7165                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7166                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7167                                       "<td><i>$author</i></td>\n" .
7168                                       "<td>" .
7169                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7170                                               -class => "list subject"},
7171                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7172                         } elsif (defined $set{'to_id'}) {
7173                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7174
7175                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7176                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7177                                               -class => "list"},
7178                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7179                                       "<br/>\n";
7180                         }
7181                 }
7182                 close $fd;
7183
7184                 # finish last commit (warning: repetition!)
7185                 if (%co) {
7186                         print "</td>\n" .
7187                               "<td class=\"link\">" .
7188                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7189                               " | " .
7190                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7191                         print "</td>\n" .
7192                               "</tr>\n";
7193                 }
7194
7195                 print "</table>\n";
7196         }
7197
7198         if ($searchtype eq 'grep') {
7199                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7200                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7201
7202                 print "<table class=\"grep_search\">\n";
7203                 my $alternate = 1;
7204                 my $matches = 0;
7205                 local $/ = "\n";
7206                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7207                         $search_use_regexp ? ('-E', '-i') : '-F',
7208                         $searchtext, $co{'tree'};
7209                 my $lastfile = '';
7210                 while (my $line = <$fd>) {
7211                         chomp $line;
7212                         my ($file, $lno, $ltext, $binary);
7213                         last if ($matches++ > 1000);
7214                         if ($line =~ /^Binary file (.+) matches$/) {
7215                                 $file = $1;
7216                                 $binary = 1;
7217                         } else {
7218                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7219                         }
7220                         if ($file ne $lastfile) {
7221                                 $lastfile and print "</td></tr>\n";
7222                                 if ($alternate++) {
7223                                         print "<tr class=\"dark\">\n";
7224                                 } else {
7225                                         print "<tr class=\"light\">\n";
7226                                 }
7227                                 print "<td class=\"list\">".
7228                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7229                                                                file_name=>"$file"),
7230                                                 -class => "list"}, esc_path($file));
7231                                 print "</td><td>\n";
7232                                 $lastfile = $file;
7233                         }
7234                         if ($binary) {
7235                                 print "<div class=\"binary\">Binary file</div>\n";
7236                         } else {
7237                                 $ltext = untabify($ltext);
7238                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7239                                         $ltext = esc_html($1, -nbsp=>1);
7240                                         $ltext .= '<span class="match">';
7241                                         $ltext .= esc_html($2, -nbsp=>1);
7242                                         $ltext .= '</span>';
7243                                         $ltext .= esc_html($3, -nbsp=>1);
7244                                 } else {
7245                                         $ltext = esc_html($ltext, -nbsp=>1);
7246                                 }
7247                                 print "<div class=\"pre\">" .
7248                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7249                                                                file_name=>"$file").'#l'.$lno,
7250                                                 -class => "linenr"}, sprintf('%4i', $lno))
7251                                         . ' ' .  $ltext . "</div>\n";
7252                         }
7253                 }
7254                 if ($lastfile) {
7255                         print "</td></tr>\n";
7256                         if ($matches > 1000) {
7257                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7258                         }
7259                 } else {
7260                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7261                 }
7262                 close $fd;
7263
7264                 print "</table>\n";
7265         }
7266         git_footer_html();
7267 }
7268
7269 sub git_search_help {
7270         git_header_html();
7271         git_print_page_nav('','', $hash,$hash,$hash);
7272         print <<EOT;
7273 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7274 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7275 the pattern entered is recognized as the POSIX extended
7276 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7277 insensitive).</p>
7278 <dl>
7279 <dt><b>commit</b></dt>
7280 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7281 EOT
7282         my $have_grep = gitweb_check_feature('grep');
7283         if ($have_grep) {
7284                 print <<EOT;
7285 <dt><b>grep</b></dt>
7286 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7287     a different one) are searched for the given pattern. On large trees, this search can take
7288 a while and put some strain on the server, so please use it with some consideration. Note that
7289 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7290 case-sensitive.</dd>
7291 EOT
7292         }
7293         print <<EOT;
7294 <dt><b>author</b></dt>
7295 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7296 <dt><b>committer</b></dt>
7297 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7298 EOT
7299         my $have_pickaxe = gitweb_check_feature('pickaxe');
7300         if ($have_pickaxe) {
7301                 print <<EOT;
7302 <dt><b>pickaxe</b></dt>
7303 <dd>All commits that caused the string to appear or disappear from any file (changes that
7304 added, removed or "modified" the string) will be listed. This search can take a while and
7305 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7306 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7307 EOT
7308         }
7309         print "</dl>\n";
7310         git_footer_html();
7311 }
7312
7313 sub git_shortlog {
7314         git_log_generic('shortlog', \&git_shortlog_body,
7315                         $hash, $hash_parent);
7316 }
7317
7318 ## ......................................................................
7319 ## feeds (RSS, Atom; OPML)
7320
7321 sub git_feed {
7322         my $format = shift || 'atom';
7323         my $have_blame = gitweb_check_feature('blame');
7324
7325         # Atom: http://www.atomenabled.org/developers/syndication/
7326         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7327         if ($format ne 'rss' && $format ne 'atom') {
7328                 die_error(400, "Unknown web feed format");
7329         }
7330
7331         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7332         my $head = $hash || 'HEAD';
7333         my @commitlist = parse_commits($head, 150, 0, $file_name);
7334
7335         my %latest_commit;
7336         my %latest_date;
7337         my $content_type = "application/$format+xml";
7338         if (defined $cgi->http('HTTP_ACCEPT') &&
7339                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7340                 # browser (feed reader) prefers text/xml
7341                 $content_type = 'text/xml';
7342         }
7343         if (defined($commitlist[0])) {
7344                 %latest_commit = %{$commitlist[0]};
7345                 my $latest_epoch = $latest_commit{'committer_epoch'};
7346                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7347                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7348                 if (defined $if_modified) {
7349                         my $since;
7350                         if (eval { require HTTP::Date; 1; }) {
7351                                 $since = HTTP::Date::str2time($if_modified);
7352                         } elsif (eval { require Time::ParseDate; 1; }) {
7353                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7354                         }
7355                         if (defined $since && $latest_epoch <= $since) {
7356                                 print $cgi->header(
7357                                         -type => $content_type,
7358                                         -charset => 'utf-8',
7359                                         -last_modified => $latest_date{'rfc2822'},
7360                                         -status => '304 Not Modified');
7361                                 return;
7362                         }
7363                 }
7364                 print $cgi->header(
7365                         -type => $content_type,
7366                         -charset => 'utf-8',
7367                         -last_modified => $latest_date{'rfc2822'});
7368         } else {
7369                 print $cgi->header(
7370                         -type => $content_type,
7371                         -charset => 'utf-8');
7372         }
7373
7374         # Optimization: skip generating the body if client asks only
7375         # for Last-Modified date.
7376         return if ($cgi->request_method() eq 'HEAD');
7377
7378         # header variables
7379         my $title = "$site_name - $project/$action";
7380         my $feed_type = 'log';
7381         if (defined $hash) {
7382                 $title .= " - '$hash'";
7383                 $feed_type = 'branch log';
7384                 if (defined $file_name) {
7385                         $title .= " :: $file_name";
7386                         $feed_type = 'history';
7387                 }
7388         } elsif (defined $file_name) {
7389                 $title .= " - $file_name";
7390                 $feed_type = 'history';
7391         }
7392         $title .= " $feed_type";
7393         my $descr = git_get_project_description($project);
7394         if (defined $descr) {
7395                 $descr = esc_html($descr);
7396         } else {
7397                 $descr = "$project " .
7398                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7399                          " feed";
7400         }
7401         my $owner = git_get_project_owner($project);
7402         $owner = esc_html($owner);
7403
7404         #header
7405         my $alt_url;
7406         if (defined $file_name) {
7407                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7408         } elsif (defined $hash) {
7409                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7410         } else {
7411                 $alt_url = href(-full=>1, action=>"summary");
7412         }
7413         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7414         if ($format eq 'rss') {
7415                 print <<XML;
7416 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7417 <channel>
7418 XML
7419                 print "<title>$title</title>\n" .
7420                       "<link>$alt_url</link>\n" .
7421                       "<description>$descr</description>\n" .
7422                       "<language>en</language>\n" .
7423                       # project owner is responsible for 'editorial' content
7424                       "<managingEditor>$owner</managingEditor>\n";
7425                 if (defined $logo || defined $favicon) {
7426                         # prefer the logo to the favicon, since RSS
7427                         # doesn't allow both
7428                         my $img = esc_url($logo || $favicon);
7429                         print "<image>\n" .
7430                               "<url>$img</url>\n" .
7431                               "<title>$title</title>\n" .
7432                               "<link>$alt_url</link>\n" .
7433                               "</image>\n";
7434                 }
7435                 if (%latest_date) {
7436                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7437                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7438                 }
7439                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7440         } elsif ($format eq 'atom') {
7441                 print <<XML;
7442 <feed xmlns="http://www.w3.org/2005/Atom">
7443 XML
7444                 print "<title>$title</title>\n" .
7445                       "<subtitle>$descr</subtitle>\n" .
7446                       '<link rel="alternate" type="text/html" href="' .
7447                       $alt_url . '" />' . "\n" .
7448                       '<link rel="self" type="' . $content_type . '" href="' .
7449                       $cgi->self_url() . '" />' . "\n" .
7450                       "<id>" . href(-full=>1) . "</id>\n" .
7451                       # use project owner for feed author
7452                       "<author><name>$owner</name></author>\n";
7453                 if (defined $favicon) {
7454                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7455                 }
7456                 if (defined $logo) {
7457                         # not twice as wide as tall: 72 x 27 pixels
7458                         print "<logo>" . esc_url($logo) . "</logo>\n";
7459                 }
7460                 if (! %latest_date) {
7461                         # dummy date to keep the feed valid until commits trickle in:
7462                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7463                 } else {
7464                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7465                 }
7466                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7467         }
7468
7469         # contents
7470         for (my $i = 0; $i <= $#commitlist; $i++) {
7471                 my %co = %{$commitlist[$i]};
7472                 my $commit = $co{'id'};
7473                 # we read 150, we always show 30 and the ones more recent than 48 hours
7474                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7475                         last;
7476                 }
7477                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7478
7479                 # get list of changed files
7480                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7481                         $co{'parent'} || "--root",
7482                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7483                         or next;
7484                 my @difftree = map { chomp; $_ } <$fd>;
7485                 close $fd
7486                         or next;
7487
7488                 # print element (entry, item)
7489                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7490                 if ($format eq 'rss') {
7491                         print "<item>\n" .
7492                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7493                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7494                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7495                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7496                               "<link>$co_url</link>\n" .
7497                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7498                               "<content:encoded>" .
7499                               "<![CDATA[\n";
7500                 } elsif ($format eq 'atom') {
7501                         print "<entry>\n" .
7502                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7503                               "<updated>$cd{'iso-8601'}</updated>\n" .
7504                               "<author>\n" .
7505                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7506                         if ($co{'author_email'}) {
7507                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7508                         }
7509                         print "</author>\n" .
7510                               # use committer for contributor
7511                               "<contributor>\n" .
7512                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7513                         if ($co{'committer_email'}) {
7514                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7515                         }
7516                         print "</contributor>\n" .
7517                               "<published>$cd{'iso-8601'}</published>\n" .
7518                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7519                               "<id>$co_url</id>\n" .
7520                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7521                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7522                 }
7523                 my $comment = $co{'comment'};
7524                 print "<pre>\n";
7525                 foreach my $line (@$comment) {
7526                         $line = esc_html($line);
7527                         print "$line\n";
7528                 }
7529                 print "</pre><ul>\n";
7530                 foreach my $difftree_line (@difftree) {
7531                         my %difftree = parse_difftree_raw_line($difftree_line);
7532                         next if !$difftree{'from_id'};
7533
7534                         my $file = $difftree{'file'} || $difftree{'to_file'};
7535
7536                         print "<li>" .
7537                               "[" .
7538                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7539                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7540                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7541                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7542                                       -title => "diff"}, 'D');
7543                         if ($have_blame) {
7544                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7545                                                              file_name=>$file, hash_base=>$commit),
7546                                               -title => "blame"}, 'B');
7547                         }
7548                         # if this is not a feed of a file history
7549                         if (!defined $file_name || $file_name ne $file) {
7550                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7551                                                              file_name=>$file, hash=>$commit),
7552                                               -title => "history"}, 'H');
7553                         }
7554                         $file = esc_path($file);
7555                         print "] ".
7556                               "$file</li>\n";
7557                 }
7558                 if ($format eq 'rss') {
7559                         print "</ul>]]>\n" .
7560                               "</content:encoded>\n" .
7561                               "</item>\n";
7562                 } elsif ($format eq 'atom') {
7563                         print "</ul>\n</div>\n" .
7564                               "</content>\n" .
7565                               "</entry>\n";
7566                 }
7567         }
7568
7569         # end of feed
7570         if ($format eq 'rss') {
7571                 print "</channel>\n</rss>\n";
7572         } elsif ($format eq 'atom') {
7573                 print "</feed>\n";
7574         }
7575 }
7576
7577 sub git_rss {
7578         git_feed('rss');
7579 }
7580
7581 sub git_atom {
7582         git_feed('atom');
7583 }
7584
7585 sub git_opml {
7586         my @list = git_get_projects_list();
7587         if (!@list) {
7588                 die_error(404, "No projects found");
7589         }
7590
7591         print $cgi->header(
7592                 -type => 'text/xml',
7593                 -charset => 'utf-8',
7594                 -content_disposition => 'inline; filename="opml.xml"');
7595
7596         print <<XML;
7597 <?xml version="1.0" encoding="utf-8"?>
7598 <opml version="1.0">
7599 <head>
7600   <title>$site_name OPML Export</title>
7601 </head>
7602 <body>
7603 <outline text="git RSS feeds">
7604 XML
7605
7606         foreach my $pr (@list) {
7607                 my %proj = %$pr;
7608                 my $head = git_get_head_hash($proj{'path'});
7609                 if (!defined $head) {
7610                         next;
7611                 }
7612                 $git_dir = "$projectroot/$proj{'path'}";
7613                 my %co = parse_commit($head);
7614                 if (!%co) {
7615                         next;
7616                 }
7617
7618                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7619                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7620                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7621                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7622         }
7623         print <<XML;
7624 </outline>
7625 </body>
7626 </opml>
7627 XML
7628 }