Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # group projects by category on the projects list
 120 # (enabled if this variable evaluates to true)
 121 our $projects_list_group_categories = 0;
 122
 123 # default category if none specified
 124 # (leave the empty string for no category)
 125 our $project_list_default_category = "";
 126
 127 # default order of projects list
 128 # valid values are none, project, descr, owner, and age
 129 our $default_projects_order = "project";
 130
 131 # show repository only if this file exists
 132 # (only effective if this variable evaluates to true)
 133 our $export_ok = "++GITWEB_EXPORT_OK++";
 134
 135 # show repository only if this subroutine returns true
 136 # when given the path to the project, for example:
 137 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 138 our $export_auth_hook = undef;
 139
 140 # only allow viewing of repositories also shown on the overview page
 141 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 142
 143 # list of git base URLs used for URL to where fetch project from,
 144 # i.e. full URL is "$git_base_url/$project"
 145 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 146
 147 # default blob_plain mimetype and default charset for text/plain blob
 148 our $default_blob_plain_mimetype = 'text/plain';
 149 our $default_text_plain_charset  = undef;
 150
 151 # file to use for guessing MIME types before trying /etc/mime.types
 152 # (relative to the current git repository)
 153 our $mimetypes_file = undef;
 154
 155 # assume this charset if line contains non-UTF-8 characters;
 156 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 157 # for which encoding all byte sequences are valid, for example
 158 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 159 # could be even 'utf-8' for the old behavior)
 160 our $fallback_encoding = 'latin1';
 161
 162 # rename detection options for git-diff and git-diff-tree
 163 # - default is '-M', with the cost proportional to
 164 #   (number of removed files) * (number of new files).
 165 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 166 #   (number of changed files + number of removed files) * (number of new files)
 167 # - even more costly is '-C', '--find-copies-harder' with cost
 168 #   (number of files in the original tree) * (number of new files)
 169 # - one might want to include '-B' option, e.g. '-B', '-M'
 170 our @diff_opts = ('-M'); # taken from git_commit
 171
 172 # Disables features that would allow repository owners to inject script into
 173 # the gitweb domain.
 174 our $prevent_xss = 0;
 175
 176 # Path to the highlight executable to use (must be the one from
 177 # http://www.andre-simon.de due to assumptions about parameters and output).
 178 # Useful if highlight is not installed on your webserver's PATH.
 179 # [Default: highlight]
 180 our $highlight_bin = "++HIGHLIGHT_BIN++";
 181
 182 # information about snapshot formats that gitweb is capable of serving
 183 our %known_snapshot_formats = (
 184         # name => {
 185         #       'display' => display name,
 186         #       'type' => mime type,
 187         #       'suffix' => filename suffix,
 188         #       'format' => --format for git-archive,
 189         #       'compressor' => [compressor command and arguments]
 190         #                       (array reference, optional)
 191         #       'disabled' => boolean (optional)}
 192         #
 193         'tgz' => {
 194                 'display' => 'tar.gz',
 195                 'type' => 'application/x-gzip',
 196                 'suffix' => '.tar.gz',
 197                 'format' => 'tar',
 198                 'compressor' => ['gzip', '-n']},
 199
 200         'tbz2' => {
 201                 'display' => 'tar.bz2',
 202                 'type' => 'application/x-bzip2',
 203                 'suffix' => '.tar.bz2',
 204                 'format' => 'tar',
 205                 'compressor' => ['bzip2']},
 206
 207         'txz' => {
 208                 'display' => 'tar.xz',
 209                 'type' => 'application/x-xz',
 210                 'suffix' => '.tar.xz',
 211                 'format' => 'tar',
 212                 'compressor' => ['xz'],
 213                 'disabled' => 1},
 214
 215         'zip' => {
 216                 'display' => 'zip',
 217                 'type' => 'application/x-zip',
 218                 'suffix' => '.zip',
 219                 'format' => 'zip'},
 220 );
 221
 222 # Aliases so we understand old gitweb.snapshot values in repository
 223 # configuration.
 224 our %known_snapshot_format_aliases = (
 225         'gzip'  => 'tgz',
 226         'bzip2' => 'tbz2',
 227         'xz'    => 'txz',
 228
 229         # backward compatibility: legacy gitweb config support
 230         'x-gzip' => undef, 'gz' => undef,
 231         'x-bzip2' => undef, 'bz2' => undef,
 232         'x-zip' => undef, '' => undef,
 233 );
 234
 235 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 236 # are changed, it may be appropriate to change these values too via
 237 # $GITWEB_CONFIG.
 238 our %avatar_size = (
 239         'default' => 16,
 240         'double'  => 32
 241 );
 242
 243 # Used to set the maximum load that we will still respond to gitweb queries.
 244 # If server load exceed this value then return "503 server busy" error.
 245 # If gitweb cannot determined server load, it is taken to be 0.
 246 # Leave it undefined (or set to 'undef') to turn off load checking.
 247 our $maxload = 300;
 248
 249 # configuration for 'highlight' (http://www.andre-simon.de/)
 250 # match by basename
 251 our %highlight_basename = (
 252         #'Program' => 'py',
 253         #'Library' => 'py',
 254         'SConstruct' => 'py', # SCons equivalent of Makefile
 255         'Makefile' => 'make',
 256 );
 257 # match by extension
 258 our %highlight_ext = (
 259         # main extensions, defining name of syntax;
 260         # see files in /usr/share/highlight/langDefs/ directory
 261         map { $_ => $_ }
 262                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 263         # alternate extensions, see /etc/highlight/filetypes.conf
 264         'h' => 'c',
 265         map { $_ => 'sh'  } qw(bash zsh ksh),
 266         map { $_ => 'cpp' } qw(cxx c++ cc),
 267         map { $_ => 'php' } qw(php3 php4 php5 phps),
 268         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 269         map { $_ => 'make'} qw(mak mk),
 270         map { $_ => 'xml' } qw(xhtml html htm),
 271 );
 272
 273 # You define site-wide feature defaults here; override them with
 274 # $GITWEB_CONFIG as necessary.
 275 our %feature = (
 276         # feature => {
 277         #       'sub' => feature-sub (subroutine),
 278         #       'override' => allow-override (boolean),
 279         #       'default' => [ default options...] (array reference)}
 280         #
 281         # if feature is overridable (it means that allow-override has true value),
 282         # then feature-sub will be called with default options as parameters;
 283         # return value of feature-sub indicates if to enable specified feature
 284         #
 285         # if there is no 'sub' key (no feature-sub), then feature cannot be
 286         # overridden
 287         #
 288         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 289         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 290         # is enabled
 291
 292         # Enable the 'blame' blob view, showing the last commit that modified
 293         # each line in the file. This can be very CPU-intensive.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'blame'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'blame'}{'override'} = 1;
 299         # and in project config gitweb.blame = 0|1;
 300         'blame' => {
 301                 'sub' => sub { feature_bool('blame', @_) },
 302                 'override' => 0,
 303                 'default' => [0]},
 304
 305         # Enable the 'snapshot' link, providing a compressed archive of any
 306         # tree. This can potentially generate high traffic if you have large
 307         # project.
 308
 309         # Value is a list of formats defined in %known_snapshot_formats that
 310         # you wish to offer.
 311         # To disable system wide have in $GITWEB_CONFIG
 312         # $feature{'snapshot'}{'default'} = [];
 313         # To have project specific config enable override in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'override'} = 1;
 315         # and in project config, a comma-separated list of formats or "none"
 316         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 317         'snapshot' => {
 318                 'sub' => \&feature_snapshot,
 319                 'override' => 0,
 320                 'default' => ['tgz']},
 321
 322         # Enable text search, which will list the commits which match author,
 323         # committer or commit text to a given string.  Enabled by default.
 324         # Project specific override is not supported.
 325         'search' => {
 326                 'override' => 0,
 327                 'default' => [1]},
 328
 329         # Enable grep search, which will list the files in currently selected
 330         # tree containing the given string. Enabled by default. This can be
 331         # potentially CPU-intensive, of course.
 332
 333         # To enable system wide have in $GITWEB_CONFIG
 334         # $feature{'grep'}{'default'} = [1];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'grep'}{'override'} = 1;
 337         # and in project config gitweb.grep = 0|1;
 338         'grep' => {
 339                 'sub' => sub { feature_bool('grep', @_) },
 340                 'override' => 0,
 341                 'default' => [1]},
 342
 343         # Enable the pickaxe search, which will list the commits that modified
 344         # a given string in a file. This can be practical and quite faster
 345         # alternative to 'blame', but still potentially CPU-intensive.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'pickaxe'}{'default'} = [1];
 349         # To have project specific config enable override in $GITWEB_CONFIG
 350         # $feature{'pickaxe'}{'override'} = 1;
 351         # and in project config gitweb.pickaxe = 0|1;
 352         'pickaxe' => {
 353                 'sub' => sub { feature_bool('pickaxe', @_) },
 354                 'override' => 0,
 355                 'default' => [1]},
 356
 357         # Enable showing size of blobs in a 'tree' view, in a separate
 358         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 359
 360         # To disable system wide have in $GITWEB_CONFIG
 361         # $feature{'show-sizes'}{'default'} = [0];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'show-sizes'}{'override'} = 1;
 364         # and in project config gitweb.showsizes = 0|1;
 365         'show-sizes' => {
 366                 'sub' => sub { feature_bool('showsizes', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Make gitweb use an alternative format of the URLs which can be
 371         # more readable and natural-looking: project name is embedded
 372         # directly in the path and the query string contains other
 373         # auxiliary information. All gitweb installations recognize
 374         # URL in either format; this configures in which formats gitweb
 375         # generates links.
 376
 377         # To enable system wide have in $GITWEB_CONFIG
 378         # $feature{'pathinfo'}{'default'} = [1];
 379         # Project specific override is not supported.
 380
 381         # Note that you will need to change the default location of CSS,
 382         # favicon, logo and possibly other files to an absolute URL. Also,
 383         # if gitweb.cgi serves as your indexfile, you will need to force
 384         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 385         'pathinfo' => {
 386                 'override' => 0,
 387                 'default' => [0]},
 388
 389         # Make gitweb consider projects in project root subdirectories
 390         # to be forks of existing projects. Given project $projname.git,
 391         # projects matching $projname/*.git will not be shown in the main
 392         # projects list, instead a '+' mark will be added to $projname
 393         # there and a 'forks' view will be enabled for the project, listing
 394         # all the forks. If project list is taken from a file, forks have
 395         # to be listed after the main project.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'forks'}{'default'} = [1];
 399         # Project specific override is not supported.
 400         'forks' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # Insert custom links to the action bar of all project pages.
 405         # This enables you mainly to link to third-party scripts integrating
 406         # into gitweb; e.g. git-browser for graphical history representation
 407         # or custom web-based repository administration interface.
 408
 409         # The 'default' value consists of a list of triplets in the form
 410         # (label, link, position) where position is the label after which
 411         # to insert the link and link is a format string where %n expands
 412         # to the project name, %f to the project path within the filesystem,
 413         # %h to the current hash (h gitweb parameter) and %b to the current
 414         # hash base (hb gitweb parameter); %% expands to %.
 415
 416         # To enable system wide have in $GITWEB_CONFIG e.g.
 417         # $feature{'actions'}{'default'} = [('graphiclog',
 418         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 419         # Project specific override is not supported.
 420         'actions' => {
 421                 'override' => 0,
 422                 'default' => []},
 423
 424         # Allow gitweb scan project content tags of project repository,
 425         # and display the popular Web 2.0-ish "tag cloud" near the projects
 426         # list.  Note that this is something COMPLETELY different from the
 427         # normal Git tags.
 428
 429         # gitweb by itself can show existing tags, but it does not handle
 430         # tagging itself; you need to do it externally, outside gitweb.
 431         # The format is described in git_get_project_ctags() subroutine.
 432         # You may want to install the HTML::TagCloud Perl module to get
 433         # a pretty tag cloud instead of just a list of tags.
 434
 435         # To enable system wide have in $GITWEB_CONFIG
 436         # $feature{'ctags'}{'default'} = [1];
 437         # Project specific override is not supported.
 438
 439         # In the future whether ctags editing is enabled might depend
 440         # on the value, but using 1 should always mean no editing of ctags.
 441         'ctags' => {
 442                 'override' => 0,
 443                 'default' => [0]},
 444
 445         # The maximum number of patches in a patchset generated in patch
 446         # view. Set this to 0 or undef to disable patch view, or to a
 447         # negative number to remove any limit.
 448
 449         # To disable system wide have in $GITWEB_CONFIG
 450         # $feature{'patches'}{'default'} = [0];
 451         # To have project specific config enable override in $GITWEB_CONFIG
 452         # $feature{'patches'}{'override'} = 1;
 453         # and in project config gitweb.patches = 0|n;
 454         # where n is the maximum number of patches allowed in a patchset.
 455         'patches' => {
 456                 'sub' => \&feature_patches,
 457                 'override' => 0,
 458                 'default' => [16]},
 459
 460         # Avatar support. When this feature is enabled, views such as
 461         # shortlog or commit will display an avatar associated with
 462         # the email of the committer(s) and/or author(s).
 463
 464         # Currently available providers are gravatar and picon.
 465         # If an unknown provider is specified, the feature is disabled.
 466
 467         # Gravatar depends on Digest::MD5.
 468         # Picon currently relies on the indiana.edu database.
 469
 470         # To enable system wide have in $GITWEB_CONFIG
 471         # $feature{'avatar'}{'default'} = ['<provider>'];
 472         # where <provider> is either gravatar or picon.
 473         # To have project specific config enable override in $GITWEB_CONFIG
 474         # $feature{'avatar'}{'override'} = 1;
 475         # and in project config gitweb.avatar = <provider>;
 476         'avatar' => {
 477                 'sub' => \&feature_avatar,
 478                 'override' => 0,
 479                 'default' => ['']},
 480
 481         # Enable displaying how much time and how many git commands
 482         # it took to generate and display page.  Disabled by default.
 483         # Project specific override is not supported.
 484         'timed' => {
 485                 'override' => 0,
 486                 'default' => [0]},
 487
 488         # Enable turning some links into links to actions which require
 489         # JavaScript to run (like 'blame_incremental').  Not enabled by
 490         # default.  Project specific override is currently not supported.
 491         'javascript-actions' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable and configure ability to change common timezone for dates
 496         # in gitweb output via JavaScript.  Enabled by default.
 497         # Project specific override is not supported.
 498         'javascript-timezone' => {
 499                 'override' => 0,
 500                 'default' => [
 501                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 502                                      # or undef to turn off this feature
 503                         'gitweb_tz', # name of cookie where to store selected timezone
 504                         'datetime',  # CSS class used to mark up dates for manipulation
 505                 ]},
 506
 507         # Syntax highlighting support. This is based on Daniel Svensson's
 508         # and Sham Chukoury's work in gitweb-xmms2.git.
 509         # It requires the 'highlight' program present in $PATH,
 510         # and therefore is disabled by default.
 511
 512         # To enable system wide have in $GITWEB_CONFIG
 513         # $feature{'highlight'}{'default'} = [1];
 514
 515         'highlight' => {
 516                 'sub' => sub { feature_bool('highlight', @_) },
 517                 'override' => 0,
 518                 'default' => [0]},
 519
 520         # Enable displaying of remote heads in the heads list
 521
 522         # To enable system wide have in $GITWEB_CONFIG
 523         # $feature{'remote_heads'}{'default'} = [1];
 524         # To have project specific config enable override in $GITWEB_CONFIG
 525         # $feature{'remote_heads'}{'override'} = 1;
 526         # and in project config gitweb.remote_heads = 0|1;
 527         'remote_heads' => {
 528                 'sub' => sub { feature_bool('remote_heads', @_) },
 529                 'override' => 0,
 530                 'default' => [0]},
 531 );
 532
 533 sub gitweb_get_feature {
 534         my ($name) = @_;
 535         return unless exists $feature{$name};
 536         my ($sub, $override, @defaults) = (
 537                 $feature{$name}{'sub'},
 538                 $feature{$name}{'override'},
 539                 @{$feature{$name}{'default'}});
 540         # project specific override is possible only if we have project
 541         our $git_dir; # global variable, declared later
 542         if (!$override || !defined $git_dir) {
 543                 return @defaults;
 544         }
 545         if (!defined $sub) {
 546                 warn "feature $name is not overridable";
 547                 return @defaults;
 548         }
 549         return $sub->(@defaults);
 550 }
 551
 552 # A wrapper to check if a given feature is enabled.
 553 # With this, you can say
 554 #
 555 #   my $bool_feat = gitweb_check_feature('bool_feat');
 556 #   gitweb_check_feature('bool_feat') or somecode;
 557 #
 558 # instead of
 559 #
 560 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 561 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 562 #
 563 sub gitweb_check_feature {
 564         return (gitweb_get_feature(@_))[0];
 565 }
 566
 567
 568 sub feature_bool {
 569         my $key = shift;
 570         my ($val) = git_get_project_config($key, '--bool');
 571
 572         if (!defined $val) {
 573                 return ($_[0]);
 574         } elsif ($val eq 'true') {
 575                 return (1);
 576         } elsif ($val eq 'false') {
 577                 return (0);
 578         }
 579 }
 580
 581 sub feature_snapshot {
 582         my (@fmts) = @_;
 583
 584         my ($val) = git_get_project_config('snapshot');
 585
 586         if ($val) {
 587                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 588         }
 589
 590         return @fmts;
 591 }
 592
 593 sub feature_patches {
 594         my @val = (git_get_project_config('patches', '--int'));
 595
 596         if (@val) {
 597                 return @val;
 598         }
 599
 600         return ($_[0]);
 601 }
 602
 603 sub feature_avatar {
 604         my @val = (git_get_project_config('avatar'));
 605
 606         return @val ? @val : @_;
 607 }
 608
 609 # checking HEAD file with -e is fragile if the repository was
 610 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 611 # and then pruned.
 612 sub check_head_link {
 613         my ($dir) = @_;
 614         my $headfile = "$dir/HEAD";
 615         return ((-e $headfile) ||
 616                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 617 }
 618
 619 sub check_export_ok {
 620         my ($dir) = @_;
 621         return (check_head_link($dir) &&
 622                 (!$export_ok || -e "$dir/$export_ok") &&
 623                 (!$export_auth_hook || $export_auth_hook->($dir)));
 624 }
 625
 626 # process alternate names for backward compatibility
 627 # filter out unsupported (unknown) snapshot formats
 628 sub filter_snapshot_fmts {
 629         my @fmts = @_;
 630
 631         @fmts = map {
 632                 exists $known_snapshot_format_aliases{$_} ?
 633                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 634         @fmts = grep {
 635                 exists $known_snapshot_formats{$_} &&
 636                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 637 }
 638
 639 # If it is set to code reference, it is code that it is to be run once per
 640 # request, allowing updating configurations that change with each request,
 641 # while running other code in config file only once.
 642 #
 643 # Otherwise, if it is false then gitweb would process config file only once;
 644 # if it is true then gitweb config would be run for each request.
 645 our $per_request_config = 1;
 646
 647 # read and parse gitweb config file given by its parameter.
 648 # returns true on success, false on recoverable error, allowing
 649 # to chain this subroutine, using first file that exists.
 650 # dies on errors during parsing config file, as it is unrecoverable.
 651 sub read_config_file {
 652         my $filename = shift;
 653         return unless defined $filename;
 654         # die if there are errors parsing config file
 655         if (-e $filename) {
 656                 do $filename;
 657                 die $@ if $@;
 658                 return 1;
 659         }
 660         return;
 661 }
 662
 663 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 664 sub evaluate_gitweb_config {
 665         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 666         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 667
 668         # use first config file that exists
 669         read_config_file($GITWEB_CONFIG) or
 670         read_config_file($GITWEB_CONFIG_SYSTEM);
 671 }
 672
 673 # Get loadavg of system, to compare against $maxload.
 674 # Currently it requires '/proc/loadavg' present to get loadavg;
 675 # if it is not present it returns 0, which means no load checking.
 676 sub get_loadavg {
 677         if( -e '/proc/loadavg' ){
 678                 open my $fd, '<', '/proc/loadavg'
 679                         or return 0;
 680                 my @load = split(/\s+/, scalar <$fd>);
 681                 close $fd;
 682
 683                 # The first three columns measure CPU and IO utilization of the last one,
 684                 # five, and 10 minute periods.  The fourth column shows the number of
 685                 # currently running processes and the total number of processes in the m/n
 686                 # format.  The last column displays the last process ID used.
 687                 return $load[0] || 0;
 688         }
 689         # additional checks for load average should go here for things that don't export
 690         # /proc/loadavg
 691
 692         return 0;
 693 }
 694
 695 # version of the core git binary
 696 our $git_version;
 697 sub evaluate_git_version {
 698         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 699         $number_of_git_cmds++;
 700 }
 701
 702 sub check_loadavg {
 703         if (defined $maxload && get_loadavg() > $maxload) {
 704                 die_error(503, "The load average on the server is too high");
 705         }
 706 }
 707
 708 # ======================================================================
 709 # input validation and dispatch
 710
 711 # input parameters can be collected from a variety of sources (presently, CGI
 712 # and PATH_INFO), so we define an %input_params hash that collects them all
 713 # together during validation: this allows subsequent uses (e.g. href()) to be
 714 # agnostic of the parameter origin
 715
 716 our %input_params = ();
 717
 718 # input parameters are stored with the long parameter name as key. This will
 719 # also be used in the href subroutine to convert parameters to their CGI
 720 # equivalent, and since the href() usage is the most frequent one, we store
 721 # the name -> CGI key mapping here, instead of the reverse.
 722 #
 723 # XXX: Warning: If you touch this, check the search form for updating,
 724 # too.
 725
 726 our @cgi_param_mapping = (
 727         project => "p",
 728         action => "a",
 729         file_name => "f",
 730         file_parent => "fp",
 731         hash => "h",
 732         hash_parent => "hp",
 733         hash_base => "hb",
 734         hash_parent_base => "hpb",
 735         page => "pg",
 736         order => "o",
 737         searchtext => "s",
 738         searchtype => "st",
 739         snapshot_format => "sf",
 740         extra_options => "opt",
 741         search_use_regexp => "sr",
 742         ctag => "by_tag",
 743         # this must be last entry (for manipulation from JavaScript)
 744         javascript => "js"
 745 );
 746 our %cgi_param_mapping = @cgi_param_mapping;
 747
 748 # we will also need to know the possible actions, for validation
 749 our %actions = (
 750         "blame" => \&git_blame,
 751         "blame_incremental" => \&git_blame_incremental,
 752         "blame_data" => \&git_blame_data,
 753         "blobdiff" => \&git_blobdiff,
 754         "blobdiff_plain" => \&git_blobdiff_plain,
 755         "blob" => \&git_blob,
 756         "blob_plain" => \&git_blob_plain,
 757         "commitdiff" => \&git_commitdiff,
 758         "commitdiff_plain" => \&git_commitdiff_plain,
 759         "commit" => \&git_commit,
 760         "forks" => \&git_forks,
 761         "heads" => \&git_heads,
 762         "history" => \&git_history,
 763         "log" => \&git_log,
 764         "patch" => \&git_patch,
 765         "patches" => \&git_patches,
 766         "remotes" => \&git_remotes,
 767         "rss" => \&git_rss,
 768         "atom" => \&git_atom,
 769         "search" => \&git_search,
 770         "search_help" => \&git_search_help,
 771         "shortlog" => \&git_shortlog,
 772         "summary" => \&git_summary,
 773         "tag" => \&git_tag,
 774         "tags" => \&git_tags,
 775         "tree" => \&git_tree,
 776         "snapshot" => \&git_snapshot,
 777         "object" => \&git_object,
 778         # those below don't need $project
 779         "opml" => \&git_opml,
 780         "project_list" => \&git_project_list,
 781         "project_index" => \&git_project_index,
 782 );
 783
 784 # finally, we have the hash of allowed extra_options for the commands that
 785 # allow them
 786 our %allowed_options = (
 787         "--no-merges" => [ qw(rss atom log shortlog history) ],
 788 );
 789
 790 # fill %input_params with the CGI parameters. All values except for 'opt'
 791 # should be single values, but opt can be an array. We should probably
 792 # build an array of parameters that can be multi-valued, but since for the time
 793 # being it's only this one, we just single it out
 794 sub evaluate_query_params {
 795         our $cgi;
 796
 797         while (my ($name, $symbol) = each %cgi_param_mapping) {
 798                 if ($symbol eq 'opt') {
 799                         $input_params{$name} = [ $cgi->param($symbol) ];
 800                 } else {
 801                         $input_params{$name} = $cgi->param($symbol);
 802                 }
 803         }
 804 }
 805
 806 # now read PATH_INFO and update the parameter list for missing parameters
 807 sub evaluate_path_info {
 808         return if defined $input_params{'project'};
 809         return if !$path_info;
 810         $path_info =~ s,^/+,,;
 811         return if !$path_info;
 812
 813         # find which part of PATH_INFO is project
 814         my $project = $path_info;
 815         $project =~ s,/+$,,;
 816         while ($project && !check_head_link("$projectroot/$project")) {
 817                 $project =~ s,/*[^/]*$,,;
 818         }
 819         return unless $project;
 820         $input_params{'project'} = $project;
 821
 822         # do not change any parameters if an action is given using the query string
 823         return if $input_params{'action'};
 824         $path_info =~ s,^\Q$project\E/*,,;
 825
 826         # next, check if we have an action
 827         my $action = $path_info;
 828         $action =~ s,/.*$,,;
 829         if (exists $actions{$action}) {
 830                 $path_info =~ s,^$action/*,,;
 831                 $input_params{'action'} = $action;
 832         }
 833
 834         # list of actions that want hash_base instead of hash, but can have no
 835         # pathname (f) parameter
 836         my @wants_base = (
 837                 'tree',
 838                 'history',
 839         );
 840
 841         # we want to catch, among others
 842         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 843         my ($parentrefname, $parentpathname, $refname, $pathname) =
 844                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 845
 846         # first, analyze the 'current' part
 847         if (defined $pathname) {
 848                 # we got "branch:filename" or "branch:dir/"
 849                 # we could use git_get_type(branch:pathname), but:
 850                 # - it needs $git_dir
 851                 # - it does a git() call
 852                 # - the convention of terminating directories with a slash
 853                 #   makes it superfluous
 854                 # - embedding the action in the PATH_INFO would make it even
 855                 #   more superfluous
 856                 $pathname =~ s,^/+,,;
 857                 if (!$pathname || substr($pathname, -1) eq "/") {
 858                         $input_params{'action'} ||= "tree";
 859                         $pathname =~ s,/$,,;
 860                 } else {
 861                         # the default action depends on whether we had parent info
 862                         # or not
 863                         if ($parentrefname) {
 864                                 $input_params{'action'} ||= "blobdiff_plain";
 865                         } else {
 866                                 $input_params{'action'} ||= "blob_plain";
 867                         }
 868                 }
 869                 $input_params{'hash_base'} ||= $refname;
 870                 $input_params{'file_name'} ||= $pathname;
 871         } elsif (defined $refname) {
 872                 # we got "branch". In this case we have to choose if we have to
 873                 # set hash or hash_base.
 874                 #
 875                 # Most of the actions without a pathname only want hash to be
 876                 # set, except for the ones specified in @wants_base that want
 877                 # hash_base instead. It should also be noted that hand-crafted
 878                 # links having 'history' as an action and no pathname or hash
 879                 # set will fail, but that happens regardless of PATH_INFO.
 880                 if (defined $parentrefname) {
 881                         # if there is parent let the default be 'shortlog' action
 882                         # (for http://git.example.com/repo.git/A..B links); if there
 883                         # is no parent, dispatch will detect type of object and set
 884                         # action appropriately if required (if action is not set)
 885                         $input_params{'action'} ||= "shortlog";
 886                 }
 887                 if ($input_params{'action'} &&
 888                     grep { $_ eq $input_params{'action'} } @wants_base) {
 889                         $input_params{'hash_base'} ||= $refname;
 890                 } else {
 891                         $input_params{'hash'} ||= $refname;
 892                 }
 893         }
 894
 895         # next, handle the 'parent' part, if present
 896         if (defined $parentrefname) {
 897                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 898                 # someproject/blobdiff/oldrev..newrev:/filename
 899                 if ($parentpathname) {
 900                         $parentpathname =~ s,^/+,,;
 901                         $parentpathname =~ s,/$,,;
 902                         $input_params{'file_parent'} ||= $parentpathname;
 903                 } else {
 904                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 905                 }
 906                 # we assume that hash_parent_base is wanted if a path was specified,
 907                 # or if the action wants hash_base instead of hash
 908                 if (defined $input_params{'file_parent'} ||
 909                         grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_parent_base'} ||= $parentrefname;
 911                 } else {
 912                         $input_params{'hash_parent'} ||= $parentrefname;
 913                 }
 914         }
 915
 916         # for the snapshot action, we allow URLs in the form
 917         # $project/snapshot/$hash.ext
 918         # where .ext determines the snapshot and gets removed from the
 919         # passed $refname to provide the $hash.
 920         #
 921         # To be able to tell that $refname includes the format extension, we
 922         # require the following two conditions to be satisfied:
 923         # - the hash input parameter MUST have been set from the $refname part
 924         #   of the URL (i.e. they must be equal)
 925         # - the snapshot format MUST NOT have been defined already (e.g. from
 926         #   CGI parameter sf)
 927         # It's also useless to try any matching unless $refname has a dot,
 928         # so we check for that too
 929         if (defined $input_params{'action'} &&
 930                 $input_params{'action'} eq 'snapshot' &&
 931                 defined $refname && index($refname, '.') != -1 &&
 932                 $refname eq $input_params{'hash'} &&
 933                 !defined $input_params{'snapshot_format'}) {
 934                 # We loop over the known snapshot formats, checking for
 935                 # extensions. Allowed extensions are both the defined suffix
 936                 # (which includes the initial dot already) and the snapshot
 937                 # format key itself, with a prepended dot
 938                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 939                         my $hash = $refname;
 940                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 941                                 next;
 942                         }
 943                         my $sfx = $1;
 944                         # a valid suffix was found, so set the snapshot format
 945                         # and reset the hash parameter
 946                         $input_params{'snapshot_format'} = $fmt;
 947                         $input_params{'hash'} = $hash;
 948                         # we also set the format suffix to the one requested
 949                         # in the URL: this way a request for e.g. .tgz returns
 950                         # a .tgz instead of a .tar.gz
 951                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 952                         last;
 953                 }
 954         }
 955 }
 956
 957 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 958      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 959      $searchtext, $search_regexp);
 960 sub evaluate_and_validate_params {
 961         our $action = $input_params{'action'};
 962         if (defined $action) {
 963                 if (!validate_action($action)) {
 964                         die_error(400, "Invalid action parameter");
 965                 }
 966         }
 967
 968         # parameters which are pathnames
 969         our $project = $input_params{'project'};
 970         if (defined $project) {
 971                 if (!validate_project($project)) {
 972                         undef $project;
 973                         die_error(404, "No such project");
 974                 }
 975         }
 976
 977         our $file_name = $input_params{'file_name'};
 978         if (defined $file_name) {
 979                 if (!validate_pathname($file_name)) {
 980                         die_error(400, "Invalid file parameter");
 981                 }
 982         }
 983
 984         our $file_parent = $input_params{'file_parent'};
 985         if (defined $file_parent) {
 986                 if (!validate_pathname($file_parent)) {
 987                         die_error(400, "Invalid file parent parameter");
 988                 }
 989         }
 990
 991         # parameters which are refnames
 992         our $hash = $input_params{'hash'};
 993         if (defined $hash) {
 994                 if (!validate_refname($hash)) {
 995                         die_error(400, "Invalid hash parameter");
 996                 }
 997         }
 998
 999         our $hash_parent = $input_params{'hash_parent'};
1000         if (defined $hash_parent) {
1001                 if (!validate_refname($hash_parent)) {
1002                         die_error(400, "Invalid hash parent parameter");
1003                 }
1004         }
1005
1006         our $hash_base = $input_params{'hash_base'};
1007         if (defined $hash_base) {
1008                 if (!validate_refname($hash_base)) {
1009                         die_error(400, "Invalid hash base parameter");
1010                 }
1011         }
1012
1013         our @extra_options = @{$input_params{'extra_options'}};
1014         # @extra_options is always defined, since it can only be (currently) set from
1015         # CGI, and $cgi->param() returns the empty array in array context if the param
1016         # is not set
1017         foreach my $opt (@extra_options) {
1018                 if (not exists $allowed_options{$opt}) {
1019                         die_error(400, "Invalid option parameter");
1020                 }
1021                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1022                         die_error(400, "Invalid option parameter for this action");
1023                 }
1024         }
1025
1026         our $hash_parent_base = $input_params{'hash_parent_base'};
1027         if (defined $hash_parent_base) {
1028                 if (!validate_refname($hash_parent_base)) {
1029                         die_error(400, "Invalid hash parent base parameter");
1030                 }
1031         }
1032
1033         # other parameters
1034         our $page = $input_params{'page'};
1035         if (defined $page) {
1036                 if ($page =~ m/[^0-9]/) {
1037                         die_error(400, "Invalid page parameter");
1038                 }
1039         }
1040
1041         our $searchtype = $input_params{'searchtype'};
1042         if (defined $searchtype) {
1043                 if ($searchtype =~ m/[^a-z]/) {
1044                         die_error(400, "Invalid searchtype parameter");
1045                 }
1046         }
1047
1048         our $search_use_regexp = $input_params{'search_use_regexp'};
1049
1050         our $searchtext = $input_params{'searchtext'};
1051         our $search_regexp;
1052         if (defined $searchtext) {
1053                 if (length($searchtext) < 2) {
1054                         die_error(403, "At least two characters are required for search parameter");
1055                 }
1056                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1057         }
1058 }
1059
1060 # path to the current git repository
1061 our $git_dir;
1062 sub evaluate_git_dir {
1063         our $git_dir = "$projectroot/$project" if $project;
1064 }
1065
1066 our (@snapshot_fmts, $git_avatar);
1067 sub configure_gitweb_features {
1068         # list of supported snapshot formats
1069         our @snapshot_fmts = gitweb_get_feature('snapshot');
1070         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1071
1072         # check that the avatar feature is set to a known provider name,
1073         # and for each provider check if the dependencies are satisfied.
1074         # if the provider name is invalid or the dependencies are not met,
1075         # reset $git_avatar to the empty string.
1076         our ($git_avatar) = gitweb_get_feature('avatar');
1077         if ($git_avatar eq 'gravatar') {
1078                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1079         } elsif ($git_avatar eq 'picon') {
1080                 # no dependencies
1081         } else {
1082                 $git_avatar = '';
1083         }
1084 }
1085
1086 # custom error handler: 'die <message>' is Internal Server Error
1087 sub handle_errors_html {
1088         my $msg = shift; # it is already HTML escaped
1089
1090         # to avoid infinite loop where error occurs in die_error,
1091         # change handler to default handler, disabling handle_errors_html
1092         set_message("Error occured when inside die_error:\n$msg");
1093
1094         # you cannot jump out of die_error when called as error handler;
1095         # the subroutine set via CGI::Carp::set_message is called _after_
1096         # HTTP headers are already written, so it cannot write them itself
1097         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1098 }
1099 set_message(\&handle_errors_html);
1100
1101 # dispatch
1102 sub dispatch {
1103         if (!defined $action) {
1104                 if (defined $hash) {
1105                         $action = git_get_type($hash);
1106                 } elsif (defined $hash_base && defined $file_name) {
1107                         $action = git_get_type("$hash_base:$file_name");
1108                 } elsif (defined $project) {
1109                         $action = 'summary';
1110                 } else {
1111                         $action = 'project_list';
1112                 }
1113         }
1114         if (!defined($actions{$action})) {
1115                 die_error(400, "Unknown action");
1116         }
1117         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1118             !$project) {
1119                 die_error(400, "Project needed");
1120         }
1121         $actions{$action}->();
1122 }
1123
1124 sub reset_timer {
1125         our $t0 = [ gettimeofday() ]
1126                 if defined $t0;
1127         our $number_of_git_cmds = 0;
1128 }
1129
1130 our $first_request = 1;
1131 sub run_request {
1132         reset_timer();
1133
1134         evaluate_uri();
1135         if ($first_request) {
1136                 evaluate_gitweb_config();
1137                 evaluate_git_version();
1138         }
1139         if ($per_request_config) {
1140                 if (ref($per_request_config) eq 'CODE') {
1141                         $per_request_config->();
1142                 } elsif (!$first_request) {
1143                         evaluate_gitweb_config();
1144                 }
1145         }
1146         check_loadavg();
1147
1148         # $projectroot and $projects_list might be set in gitweb config file
1149         $projects_list ||= $projectroot;
1150
1151         evaluate_query_params();
1152         evaluate_path_info();
1153         evaluate_and_validate_params();
1154         evaluate_git_dir();
1155
1156         configure_gitweb_features();
1157
1158         dispatch();
1159 }
1160
1161 our $is_last_request = sub { 1 };
1162 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1163 our $CGI = 'CGI';
1164 our $cgi;
1165 sub configure_as_fcgi {
1166         require CGI::Fast;
1167         our $CGI = 'CGI::Fast';
1168
1169         my $request_number = 0;
1170         # let each child service 100 requests
1171         our $is_last_request = sub { ++$request_number > 100 };
1172 }
1173 sub evaluate_argv {
1174         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1175         configure_as_fcgi()
1176                 if $script_name =~ /\.fcgi$/;
1177
1178         return unless (@ARGV);
1179
1180         require Getopt::Long;
1181         Getopt::Long::GetOptions(
1182                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1183                 'nproc|n=i' => sub {
1184                         my ($arg, $val) = @_;
1185                         return unless eval { require FCGI::ProcManager; 1; };
1186                         my $proc_manager = FCGI::ProcManager->new({
1187                                 n_processes => $val,
1188                         });
1189                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1190                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1191                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1192                 },
1193         );
1194 }
1195
1196 sub run {
1197         evaluate_argv();
1198
1199         $first_request = 1;
1200         $pre_listen_hook->()
1201                 if $pre_listen_hook;
1202
1203  REQUEST:
1204         while ($cgi = $CGI->new()) {
1205                 $pre_dispatch_hook->()
1206                         if $pre_dispatch_hook;
1207
1208                 run_request();
1209
1210                 $post_dispatch_hook->()
1211                         if $post_dispatch_hook;
1212                 $first_request = 0;
1213
1214                 last REQUEST if ($is_last_request->());
1215         }
1216
1217  DONE_GITWEB:
1218         1;
1219 }
1220
1221 run();
1222
1223 if (defined caller) {
1224         # wrapped in a subroutine processing requests,
1225         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1226         return;
1227 } else {
1228         # pure CGI script, serving single request
1229         exit;
1230 }
1231
1232 ## ======================================================================
1233 ## action links
1234
1235 # possible values of extra options
1236 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1237 # -replay => 1      - start from a current view (replay with modifications)
1238 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1239 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1240 sub href {
1241         my %params = @_;
1242         # default is to use -absolute url() i.e. $my_uri
1243         my $href = $params{-full} ? $my_url : $my_uri;
1244
1245         # implicit -replay, must be first of implicit params
1246         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1247
1248         $params{'project'} = $project unless exists $params{'project'};
1249
1250         if ($params{-replay}) {
1251                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1252                         if (!exists $params{$name}) {
1253                                 $params{$name} = $input_params{$name};
1254                         }
1255                 }
1256         }
1257
1258         my $use_pathinfo = gitweb_check_feature('pathinfo');
1259         if (defined $params{'project'} &&
1260             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1261                 # try to put as many parameters as possible in PATH_INFO:
1262                 #   - project name
1263                 #   - action
1264                 #   - hash_parent or hash_parent_base:/file_parent
1265                 #   - hash or hash_base:/filename
1266                 #   - the snapshot_format as an appropriate suffix
1267
1268                 # When the script is the root DirectoryIndex for the domain,
1269                 # $href here would be something like http://gitweb.example.com/
1270                 # Thus, we strip any trailing / from $href, to spare us double
1271                 # slashes in the final URL
1272                 $href =~ s,/$,,;
1273
1274                 # Then add the project name, if present
1275                 $href .= "/".esc_path_info($params{'project'});
1276                 delete $params{'project'};
1277
1278                 # since we destructively absorb parameters, we keep this
1279                 # boolean that remembers if we're handling a snapshot
1280                 my $is_snapshot = $params{'action'} eq 'snapshot';
1281
1282                 # Summary just uses the project path URL, any other action is
1283                 # added to the URL
1284                 if (defined $params{'action'}) {
1285                         $href .= "/".esc_path_info($params{'action'})
1286                                 unless $params{'action'} eq 'summary';
1287                         delete $params{'action'};
1288                 }
1289
1290                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1291                 # stripping nonexistent or useless pieces
1292                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1293                         || $params{'hash_parent'} || $params{'hash'});
1294                 if (defined $params{'hash_base'}) {
1295                         if (defined $params{'hash_parent_base'}) {
1296                                 $href .= esc_path_info($params{'hash_parent_base'});
1297                                 # skip the file_parent if it's the same as the file_name
1298                                 if (defined $params{'file_parent'}) {
1299                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1300                                                 delete $params{'file_parent'};
1301                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1302                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1303                                                 delete $params{'file_parent'};
1304                                         }
1305                                 }
1306                                 $href .= "..";
1307                                 delete $params{'hash_parent'};
1308                                 delete $params{'hash_parent_base'};
1309                         } elsif (defined $params{'hash_parent'}) {
1310                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1311                                 delete $params{'hash_parent'};
1312                         }
1313
1314                         $href .= esc_path_info($params{'hash_base'});
1315                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1316                                 $href .= ":/".esc_path_info($params{'file_name'});
1317                                 delete $params{'file_name'};
1318                         }
1319                         delete $params{'hash'};
1320                         delete $params{'hash_base'};
1321                 } elsif (defined $params{'hash'}) {
1322                         $href .= esc_path_info($params{'hash'});
1323                         delete $params{'hash'};
1324                 }
1325
1326                 # If the action was a snapshot, we can absorb the
1327                 # snapshot_format parameter too
1328                 if ($is_snapshot) {
1329                         my $fmt = $params{'snapshot_format'};
1330                         # snapshot_format should always be defined when href()
1331                         # is called, but just in case some code forgets, we
1332                         # fall back to the default
1333                         $fmt ||= $snapshot_fmts[0];
1334                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1335                         delete $params{'snapshot_format'};
1336                 }
1337         }
1338
1339         # now encode the parameters explicitly
1340         my @result = ();
1341         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1342                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1343                 if (defined $params{$name}) {
1344                         if (ref($params{$name}) eq "ARRAY") {
1345                                 foreach my $par (@{$params{$name}}) {
1346                                         push @result, $symbol . "=" . esc_param($par);
1347                                 }
1348                         } else {
1349                                 push @result, $symbol . "=" . esc_param($params{$name});
1350                         }
1351                 }
1352         }
1353         $href .= "?" . join(';', @result) if scalar @result;
1354
1355         # final transformation: trailing spaces must be escaped (URI-encoded)
1356         $href =~ s/(\s+)$/CGI::escape($1)/e;
1357
1358         if ($params{-anchor}) {
1359                 $href .= "#".esc_param($params{-anchor});
1360         }
1361
1362         return $href;
1363 }
1364
1365
1366 ## ======================================================================
1367 ## validation, quoting/unquoting and escaping
1368
1369 sub validate_action {
1370         my $input = shift || return undef;
1371         return undef unless exists $actions{$input};
1372         return $input;
1373 }
1374
1375 sub validate_project {
1376         my $input = shift || return undef;
1377         if (!validate_pathname($input) ||
1378                 !(-d "$projectroot/$input") ||
1379                 !check_export_ok("$projectroot/$input") ||
1380                 ($strict_export && !project_in_list($input))) {
1381                 return undef;
1382         } else {
1383                 return $input;
1384         }
1385 }
1386
1387 sub validate_pathname {
1388         my $input = shift || return undef;
1389
1390         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1391         # at the beginning, at the end, and between slashes.
1392         # also this catches doubled slashes
1393         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1394                 return undef;
1395         }
1396         # no null characters
1397         if ($input =~ m!\0!) {
1398                 return undef;
1399         }
1400         return $input;
1401 }
1402
1403 sub validate_refname {
1404         my $input = shift || return undef;
1405
1406         # textual hashes are O.K.
1407         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1408                 return $input;
1409         }
1410         # it must be correct pathname
1411         $input = validate_pathname($input)
1412                 or return undef;
1413         # restrictions on ref name according to git-check-ref-format
1414         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1415                 return undef;
1416         }
1417         return $input;
1418 }
1419
1420 # decode sequences of octets in utf8 into Perl's internal form,
1421 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1422 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1423 sub to_utf8 {
1424         my $str = shift;
1425         return undef unless defined $str;
1426         if (utf8::valid($str)) {
1427                 utf8::decode($str);
1428                 return $str;
1429         } else {
1430                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1431         }
1432 }
1433
1434 # quote unsafe chars, but keep the slash, even when it's not
1435 # correct, but quoted slashes look too horrible in bookmarks
1436 sub esc_param {
1437         my $str = shift;
1438         return undef unless defined $str;
1439         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1440         $str =~ s/ /\+/g;
1441         return $str;
1442 }
1443
1444 # the quoting rules for path_info fragment are slightly different
1445 sub esc_path_info {
1446         my $str = shift;
1447         return undef unless defined $str;
1448
1449         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1450         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1451
1452         return $str;
1453 }
1454
1455 # quote unsafe chars in whole URL, so some characters cannot be quoted
1456 sub esc_url {
1457         my $str = shift;
1458         return undef unless defined $str;
1459         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1460         $str =~ s/ /\+/g;
1461         return $str;
1462 }
1463
1464 # quote unsafe characters in HTML attributes
1465 sub esc_attr {
1466
1467         # for XHTML conformance escaping '"' to '&quot;' is not enough
1468         return esc_html(@_);
1469 }
1470
1471 # replace invalid utf8 character with SUBSTITUTION sequence
1472 sub esc_html {
1473         my $str = shift;
1474         my %opts = @_;
1475
1476         return undef unless defined $str;
1477
1478         $str = to_utf8($str);
1479         $str = $cgi->escapeHTML($str);
1480         if ($opts{'-nbsp'}) {
1481                 $str =~ s/ /&nbsp;/g;
1482         }
1483         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1484         return $str;
1485 }
1486
1487 # quote control characters and escape filename to HTML
1488 sub esc_path {
1489         my $str = shift;
1490         my %opts = @_;
1491
1492         return undef unless defined $str;
1493
1494         $str = to_utf8($str);
1495         $str = $cgi->escapeHTML($str);
1496         if ($opts{'-nbsp'}) {
1497                 $str =~ s/ /&nbsp;/g;
1498         }
1499         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1500         return $str;
1501 }
1502
1503 # Make control characters "printable", using character escape codes (CEC)
1504 sub quot_cec {
1505         my $cntrl = shift;
1506         my %opts = @_;
1507         my %es = ( # character escape codes, aka escape sequences
1508                 "\t" => '\t',   # tab            (HT)
1509                 "\n" => '\n',   # line feed      (LF)
1510                 "\r" => '\r',   # carrige return (CR)
1511                 "\f" => '\f',   # form feed      (FF)
1512                 "\b" => '\b',   # backspace      (BS)
1513                 "\a" => '\a',   # alarm (bell)   (BEL)
1514                 "\e" => '\e',   # escape         (ESC)
1515                 "\013" => '\v', # vertical tab   (VT)
1516                 "\000" => '\0', # nul character  (NUL)
1517         );
1518         my $chr = ( (exists $es{$cntrl})
1519                     ? $es{$cntrl}
1520                     : sprintf('\%2x', ord($cntrl)) );
1521         if ($opts{-nohtml}) {
1522                 return $chr;
1523         } else {
1524                 return "<span class=\"cntrl\">$chr</span>";
1525         }
1526 }
1527
1528 # Alternatively use unicode control pictures codepoints,
1529 # Unicode "printable representation" (PR)
1530 sub quot_upr {
1531         my $cntrl = shift;
1532         my %opts = @_;
1533
1534         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1535         if ($opts{-nohtml}) {
1536                 return $chr;
1537         } else {
1538                 return "<span class=\"cntrl\">$chr</span>";
1539         }
1540 }
1541
1542 # git may return quoted and escaped filenames
1543 sub unquote {
1544         my $str = shift;
1545
1546         sub unq {
1547                 my $seq = shift;
1548                 my %es = ( # character escape codes, aka escape sequences
1549                         't' => "\t",   # tab            (HT, TAB)
1550                         'n' => "\n",   # newline        (NL)
1551                         'r' => "\r",   # return         (CR)
1552                         'f' => "\f",   # form feed      (FF)
1553                         'b' => "\b",   # backspace      (BS)
1554                         'a' => "\a",   # alarm (bell)   (BEL)
1555                         'e' => "\e",   # escape         (ESC)
1556                         'v' => "\013", # vertical tab   (VT)
1557                 );
1558
1559                 if ($seq =~ m/^[0-7]{1,3}$/) {
1560                         # octal char sequence
1561                         return chr(oct($seq));
1562                 } elsif (exists $es{$seq}) {
1563                         # C escape sequence, aka character escape code
1564                         return $es{$seq};
1565                 }
1566                 # quoted ordinary character
1567                 return $seq;
1568         }
1569
1570         if ($str =~ m/^"(.*)"$/) {
1571                 # needs unquoting
1572                 $str = $1;
1573                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1574         }
1575         return $str;
1576 }
1577
1578 # escape tabs (convert tabs to spaces)
1579 sub untabify {
1580         my $line = shift;
1581
1582         while ((my $pos = index($line, "\t")) != -1) {
1583                 if (my $count = (8 - ($pos % 8))) {
1584                         my $spaces = ' ' x $count;
1585                         $line =~ s/\t/$spaces/;
1586                 }
1587         }
1588
1589         return $line;
1590 }
1591
1592 sub project_in_list {
1593         my $project = shift;
1594         my @list = git_get_projects_list();
1595         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1596 }
1597
1598 ## ----------------------------------------------------------------------
1599 ## HTML aware string manipulation
1600
1601 # Try to chop given string on a word boundary between position
1602 # $len and $len+$add_len. If there is no word boundary there,
1603 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1604 # (marking chopped part) would be longer than given string.
1605 sub chop_str {
1606         my $str = shift;
1607         my $len = shift;
1608         my $add_len = shift || 10;
1609         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1610
1611         # Make sure perl knows it is utf8 encoded so we don't
1612         # cut in the middle of a utf8 multibyte char.
1613         $str = to_utf8($str);
1614
1615         # allow only $len chars, but don't cut a word if it would fit in $add_len
1616         # if it doesn't fit, cut it if it's still longer than the dots we would add
1617         # remove chopped character entities entirely
1618
1619         # when chopping in the middle, distribute $len into left and right part
1620         # return early if chopping wouldn't make string shorter
1621         if ($where eq 'center') {
1622                 return $str if ($len + 5 >= length($str)); # filler is length 5
1623                 $len = int($len/2);
1624         } else {
1625                 return $str if ($len + 4 >= length($str)); # filler is length 4
1626         }
1627
1628         # regexps: ending and beginning with word part up to $add_len
1629         my $endre = qr/.{$len}\w{0,$add_len}/;
1630         my $begre = qr/\w{0,$add_len}.{$len}/;
1631
1632         if ($where eq 'left') {
1633                 $str =~ m/^(.*?)($begre)$/;
1634                 my ($lead, $body) = ($1, $2);
1635                 if (length($lead) > 4) {
1636                         $lead = " ...";
1637                 }
1638                 return "$lead$body";
1639
1640         } elsif ($where eq 'center') {
1641                 $str =~ m/^($endre)(.*)$/;
1642                 my ($left, $str)  = ($1, $2);
1643                 $str =~ m/^(.*?)($begre)$/;
1644                 my ($mid, $right) = ($1, $2);
1645                 if (length($mid) > 5) {
1646                         $mid = " ... ";
1647                 }
1648                 return "$left$mid$right";
1649
1650         } else {
1651                 $str =~ m/^($endre)(.*)$/;
1652                 my $body = $1;
1653                 my $tail = $2;
1654                 if (length($tail) > 4) {
1655                         $tail = "... ";
1656                 }
1657                 return "$body$tail";
1658         }
1659 }
1660
1661 # takes the same arguments as chop_str, but also wraps a <span> around the
1662 # result with a title attribute if it does get chopped. Additionally, the
1663 # string is HTML-escaped.
1664 sub chop_and_escape_str {
1665         my ($str) = @_;
1666
1667         my $chopped = chop_str(@_);
1668         if ($chopped eq $str) {
1669                 return esc_html($chopped);
1670         } else {
1671                 $str =~ s/[[:cntrl:]]/?/g;
1672                 return $cgi->span({-title=>$str}, esc_html($chopped));
1673         }
1674 }
1675
1676 ## ----------------------------------------------------------------------
1677 ## functions returning short strings
1678
1679 # CSS class for given age value (in seconds)
1680 sub age_class {
1681         my $age = shift;
1682
1683         if (!defined $age) {
1684                 return "noage";
1685         } elsif ($age < 60*60*2) {
1686                 return "age0";
1687         } elsif ($age < 60*60*24*2) {
1688                 return "age1";
1689         } else {
1690                 return "age2";
1691         }
1692 }
1693
1694 # convert age in seconds to "nn units ago" string
1695 sub age_string {
1696         my $age = shift;
1697         my $age_str;
1698
1699         if ($age > 60*60*24*365*2) {
1700                 $age_str = (int $age/60/60/24/365);
1701                 $age_str .= " years ago";
1702         } elsif ($age > 60*60*24*(365/12)*2) {
1703                 $age_str = int $age/60/60/24/(365/12);
1704                 $age_str .= " months ago";
1705         } elsif ($age > 60*60*24*7*2) {
1706                 $age_str = int $age/60/60/24/7;
1707                 $age_str .= " weeks ago";
1708         } elsif ($age > 60*60*24*2) {
1709                 $age_str = int $age/60/60/24;
1710                 $age_str .= " days ago";
1711         } elsif ($age > 60*60*2) {
1712                 $age_str = int $age/60/60;
1713                 $age_str .= " hours ago";
1714         } elsif ($age > 60*2) {
1715                 $age_str = int $age/60;
1716                 $age_str .= " min ago";
1717         } elsif ($age > 2) {
1718                 $age_str = int $age;
1719                 $age_str .= " sec ago";
1720         } else {
1721                 $age_str .= " right now";
1722         }
1723         return $age_str;
1724 }
1725
1726 use constant {
1727         S_IFINVALID => 0030000,
1728         S_IFGITLINK => 0160000,
1729 };
1730
1731 # submodule/subproject, a commit object reference
1732 sub S_ISGITLINK {
1733         my $mode = shift;
1734
1735         return (($mode & S_IFMT) == S_IFGITLINK)
1736 }
1737
1738 # convert file mode in octal to symbolic file mode string
1739 sub mode_str {
1740         my $mode = oct shift;
1741
1742         if (S_ISGITLINK($mode)) {
1743                 return 'm---------';
1744         } elsif (S_ISDIR($mode & S_IFMT)) {
1745                 return 'drwxr-xr-x';
1746         } elsif (S_ISLNK($mode)) {
1747                 return 'lrwxrwxrwx';
1748         } elsif (S_ISREG($mode)) {
1749                 # git cares only about the executable bit
1750                 if ($mode & S_IXUSR) {
1751                         return '-rwxr-xr-x';
1752                 } else {
1753                         return '-rw-r--r--';
1754                 };
1755         } else {
1756                 return '----------';
1757         }
1758 }
1759
1760 # convert file mode in octal to file type string
1761 sub file_type {
1762         my $mode = shift;
1763
1764         if ($mode !~ m/^[0-7]+$/) {
1765                 return $mode;
1766         } else {
1767                 $mode = oct $mode;
1768         }
1769
1770         if (S_ISGITLINK($mode)) {
1771                 return "submodule";
1772         } elsif (S_ISDIR($mode & S_IFMT)) {
1773                 return "directory";
1774         } elsif (S_ISLNK($mode)) {
1775                 return "symlink";
1776         } elsif (S_ISREG($mode)) {
1777                 return "file";
1778         } else {
1779                 return "unknown";
1780         }
1781 }
1782
1783 # convert file mode in octal to file type description string
1784 sub file_type_long {
1785         my $mode = shift;
1786
1787         if ($mode !~ m/^[0-7]+$/) {
1788                 return $mode;
1789         } else {
1790                 $mode = oct $mode;
1791         }
1792
1793         if (S_ISGITLINK($mode)) {
1794                 return "submodule";
1795         } elsif (S_ISDIR($mode & S_IFMT)) {
1796                 return "directory";
1797         } elsif (S_ISLNK($mode)) {
1798                 return "symlink";
1799         } elsif (S_ISREG($mode)) {
1800                 if ($mode & S_IXUSR) {
1801                         return "executable";
1802                 } else {
1803                         return "file";
1804                 };
1805         } else {
1806                 return "unknown";
1807         }
1808 }
1809
1810
1811 ## ----------------------------------------------------------------------
1812 ## functions returning short HTML fragments, or transforming HTML fragments
1813 ## which don't belong to other sections
1814
1815 # format line of commit message.
1816 sub format_log_line_html {
1817         my $line = shift;
1818
1819         $line = esc_html($line, -nbsp=>1);
1820         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1821                 $cgi->a({-href => href(action=>"object", hash=>$1),
1822                                         -class => "text"}, $1);
1823         }eg;
1824
1825         return $line;
1826 }
1827
1828 # format marker of refs pointing to given object
1829
1830 # the destination action is chosen based on object type and current context:
1831 # - for annotated tags, we choose the tag view unless it's the current view
1832 #   already, in which case we go to shortlog view
1833 # - for other refs, we keep the current view if we're in history, shortlog or
1834 #   log view, and select shortlog otherwise
1835 sub format_ref_marker {
1836         my ($refs, $id) = @_;
1837         my $markers = '';
1838
1839         if (defined $refs->{$id}) {
1840                 foreach my $ref (@{$refs->{$id}}) {
1841                         # this code exploits the fact that non-lightweight tags are the
1842                         # only indirect objects, and that they are the only objects for which
1843                         # we want to use tag instead of shortlog as action
1844                         my ($type, $name) = qw();
1845                         my $indirect = ($ref =~ s/\^\{\}$//);
1846                         # e.g. tags/v2.6.11 or heads/next
1847                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1848                                 $type = $1;
1849                                 $name = $2;
1850                         } else {
1851                                 $type = "ref";
1852                                 $name = $ref;
1853                         }
1854
1855                         my $class = $type;
1856                         $class .= " indirect" if $indirect;
1857
1858                         my $dest_action = "shortlog";
1859
1860                         if ($indirect) {
1861                                 $dest_action = "tag" unless $action eq "tag";
1862                         } elsif ($action =~ /^(history|(short)?log)$/) {
1863                                 $dest_action = $action;
1864                         }
1865
1866                         my $dest = "";
1867                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1868                         $dest .= $ref;
1869
1870                         my $link = $cgi->a({
1871                                 -href => href(
1872                                         action=>$dest_action,
1873                                         hash=>$dest
1874                                 )}, $name);
1875
1876                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1877                                 $link . "</span>";
1878                 }
1879         }
1880
1881         if ($markers) {
1882                 return ' <span class="refs">'. $markers . '</span>';
1883         } else {
1884                 return "";
1885         }
1886 }
1887
1888 # format, perhaps shortened and with markers, title line
1889 sub format_subject_html {
1890         my ($long, $short, $href, $extra) = @_;
1891         $extra = '' unless defined($extra);
1892
1893         if (length($short) < length($long)) {
1894                 $long =~ s/[[:cntrl:]]/?/g;
1895                 return $cgi->a({-href => $href, -class => "list subject",
1896                                 -title => to_utf8($long)},
1897                        esc_html($short)) . $extra;
1898         } else {
1899                 return $cgi->a({-href => $href, -class => "list subject"},
1900                        esc_html($long)) . $extra;
1901         }
1902 }
1903
1904 # Rather than recomputing the url for an email multiple times, we cache it
1905 # after the first hit. This gives a visible benefit in views where the avatar
1906 # for the same email is used repeatedly (e.g. shortlog).
1907 # The cache is shared by all avatar engines (currently gravatar only), which
1908 # are free to use it as preferred. Since only one avatar engine is used for any
1909 # given page, there's no risk for cache conflicts.
1910 our %avatar_cache = ();
1911
1912 # Compute the picon url for a given email, by using the picon search service over at
1913 # http://www.cs.indiana.edu/picons/search.html
1914 sub picon_url {
1915         my $email = lc shift;
1916         if (!$avatar_cache{$email}) {
1917                 my ($user, $domain) = split('@', $email);
1918                 $avatar_cache{$email} =
1919                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1920                         "$domain/$user/" .
1921                         "users+domains+unknown/up/single";
1922         }
1923         return $avatar_cache{$email};
1924 }
1925
1926 # Compute the gravatar url for a given email, if it's not in the cache already.
1927 # Gravatar stores only the part of the URL before the size, since that's the
1928 # one computationally more expensive. This also allows reuse of the cache for
1929 # different sizes (for this particular engine).
1930 sub gravatar_url {
1931         my $email = lc shift;
1932         my $size = shift;
1933         $avatar_cache{$email} ||=
1934                 "http://www.gravatar.com/avatar/" .
1935                         Digest::MD5::md5_hex($email) . "?s=";
1936         return $avatar_cache{$email} . $size;
1937 }
1938
1939 # Insert an avatar for the given $email at the given $size if the feature
1940 # is enabled.
1941 sub git_get_avatar {
1942         my ($email, %opts) = @_;
1943         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1944         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1945         $opts{-size} ||= 'default';
1946         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1947         my $url = "";
1948         if ($git_avatar eq 'gravatar') {
1949                 $url = gravatar_url($email, $size);
1950         } elsif ($git_avatar eq 'picon') {
1951                 $url = picon_url($email);
1952         }
1953         # Other providers can be added by extending the if chain, defining $url
1954         # as needed. If no variant puts something in $url, we assume avatars
1955         # are completely disabled/unavailable.
1956         if ($url) {
1957                 return $pre_white .
1958                        "<img width=\"$size\" " .
1959                             "class=\"avatar\" " .
1960                             "src=\"".esc_url($url)."\" " .
1961                             "alt=\"\" " .
1962                        "/>" . $post_white;
1963         } else {
1964                 return "";
1965         }
1966 }
1967
1968 sub format_search_author {
1969         my ($author, $searchtype, $displaytext) = @_;
1970         my $have_search = gitweb_check_feature('search');
1971
1972         if ($have_search) {
1973                 my $performed = "";
1974                 if ($searchtype eq 'author') {
1975                         $performed = "authored";
1976                 } elsif ($searchtype eq 'committer') {
1977                         $performed = "committed";
1978                 }
1979
1980                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1981                                 searchtext=>$author,
1982                                 searchtype=>$searchtype), class=>"list",
1983                                 title=>"Search for commits $performed by $author"},
1984                                 $displaytext);
1985
1986         } else {
1987                 return $displaytext;
1988         }
1989 }
1990
1991 # format the author name of the given commit with the given tag
1992 # the author name is chopped and escaped according to the other
1993 # optional parameters (see chop_str).
1994 sub format_author_html {
1995         my $tag = shift;
1996         my $co = shift;
1997         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1998         return "<$tag class=\"author\">" .
1999                format_search_author($co->{'author_name'}, "author",
2000                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2001                        $author) .
2002                "</$tag>";
2003 }
2004
2005 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2006 sub format_git_diff_header_line {
2007         my $line = shift;
2008         my $diffinfo = shift;
2009         my ($from, $to) = @_;
2010
2011         if ($diffinfo->{'nparents'}) {
2012                 # combined diff
2013                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2014                 if ($to->{'href'}) {
2015                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2016                                          esc_path($to->{'file'}));
2017                 } else { # file was deleted (no href)
2018                         $line .= esc_path($to->{'file'});
2019                 }
2020         } else {
2021                 # "ordinary" diff
2022                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2023                 if ($from->{'href'}) {
2024                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2025                                          'a/' . esc_path($from->{'file'}));
2026                 } else { # file was added (no href)
2027                         $line .= 'a/' . esc_path($from->{'file'});
2028                 }
2029                 $line .= ' ';
2030                 if ($to->{'href'}) {
2031                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2032                                          'b/' . esc_path($to->{'file'}));
2033                 } else { # file was deleted
2034                         $line .= 'b/' . esc_path($to->{'file'});
2035                 }
2036         }
2037
2038         return "<div class=\"diff header\">$line</div>\n";
2039 }
2040
2041 # format extended diff header line, before patch itself
2042 sub format_extended_diff_header_line {
2043         my $line = shift;
2044         my $diffinfo = shift;
2045         my ($from, $to) = @_;
2046
2047         # match <path>
2048         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2049                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2050                                        esc_path($from->{'file'}));
2051         }
2052         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2053                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2054                                  esc_path($to->{'file'}));
2055         }
2056         # match single <mode>
2057         if ($line =~ m/\s(\d{6})$/) {
2058                 $line .= '<span class="info"> (' .
2059                          file_type_long($1) .
2060                          ')</span>';
2061         }
2062         # match <hash>
2063         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2064                 # can match only for combined diff
2065                 $line = 'index ';
2066                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2067                         if ($from->{'href'}[$i]) {
2068                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2069                                                   -class=>"hash"},
2070                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2071                         } else {
2072                                 $line .= '0' x 7;
2073                         }
2074                         # separator
2075                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2076                 }
2077                 $line .= '..';
2078                 if ($to->{'href'}) {
2079                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2080                                          substr($diffinfo->{'to_id'},0,7));
2081                 } else {
2082                         $line .= '0' x 7;
2083                 }
2084
2085         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2086                 # can match only for ordinary diff
2087                 my ($from_link, $to_link);
2088                 if ($from->{'href'}) {
2089                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2090                                              substr($diffinfo->{'from_id'},0,7));
2091                 } else {
2092                         $from_link = '0' x 7;
2093                 }
2094                 if ($to->{'href'}) {
2095                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2096                                            substr($diffinfo->{'to_id'},0,7));
2097                 } else {
2098                         $to_link = '0' x 7;
2099                 }
2100                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2101                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2102         }
2103
2104         return $line . "<br/>\n";
2105 }
2106
2107 # format from-file/to-file diff header
2108 sub format_diff_from_to_header {
2109         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2110         my $line;
2111         my $result = '';
2112
2113         $line = $from_line;
2114         #assert($line =~ m/^---/) if DEBUG;
2115         # no extra formatting for "^--- /dev/null"
2116         if (! $diffinfo->{'nparents'}) {
2117                 # ordinary (single parent) diff
2118                 if ($line =~ m!^--- "?a/!) {
2119                         if ($from->{'href'}) {
2120                                 $line = '--- a/' .
2121                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2122                                                 esc_path($from->{'file'}));
2123                         } else {
2124                                 $line = '--- a/' .
2125                                         esc_path($from->{'file'});
2126                         }
2127                 }
2128                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2129
2130         } else {
2131                 # combined diff (merge commit)
2132                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2133                         if ($from->{'href'}[$i]) {
2134                                 $line = '--- ' .
2135                                         $cgi->a({-href=>href(action=>"blobdiff",
2136                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2137                                                              hash_parent_base=>$parents[$i],
2138                                                              file_parent=>$from->{'file'}[$i],
2139                                                              hash=>$diffinfo->{'to_id'},
2140                                                              hash_base=>$hash,
2141                                                              file_name=>$to->{'file'}),
2142                                                  -class=>"path",
2143                                                  -title=>"diff" . ($i+1)},
2144                                                 $i+1) .
2145                                         '/' .
2146                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2147                                                 esc_path($from->{'file'}[$i]));
2148                         } else {
2149                                 $line = '--- /dev/null';
2150                         }
2151                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2152                 }
2153         }
2154
2155         $line = $to_line;
2156         #assert($line =~ m/^\+\+\+/) if DEBUG;
2157         # no extra formatting for "^+++ /dev/null"
2158         if ($line =~ m!^\+\+\+ "?b/!) {
2159                 if ($to->{'href'}) {
2160                         $line = '+++ b/' .
2161                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2162                                         esc_path($to->{'file'}));
2163                 } else {
2164                         $line = '+++ b/' .
2165                                 esc_path($to->{'file'});
2166                 }
2167         }
2168         $result .= qq!<div class="diff to_file">$line</div>\n!;
2169
2170         return $result;
2171 }
2172
2173 # create note for patch simplified by combined diff
2174 sub format_diff_cc_simplified {
2175         my ($diffinfo, @parents) = @_;
2176         my $result = '';
2177
2178         $result .= "<div class=\"diff header\">" .
2179                    "diff --cc ";
2180         if (!is_deleted($diffinfo)) {
2181                 $result .= $cgi->a({-href => href(action=>"blob",
2182                                                   hash_base=>$hash,
2183                                                   hash=>$diffinfo->{'to_id'},
2184                                                   file_name=>$diffinfo->{'to_file'}),
2185                                     -class => "path"},
2186                                    esc_path($diffinfo->{'to_file'}));
2187         } else {
2188                 $result .= esc_path($diffinfo->{'to_file'});
2189         }
2190         $result .= "</div>\n" . # class="diff header"
2191                    "<div class=\"diff nodifferences\">" .
2192                    "Simple merge" .
2193                    "</div>\n"; # class="diff nodifferences"
2194
2195         return $result;
2196 }
2197
2198 # format patch (diff) line (not to be used for diff headers)
2199 sub format_diff_line {
2200         my $line = shift;
2201         my ($from, $to) = @_;
2202         my $diff_class = "";
2203
2204         chomp $line;
2205
2206         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2207                 # combined diff
2208                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2209                 if ($line =~ m/^\@{3}/) {
2210                         $diff_class = " chunk_header";
2211                 } elsif ($line =~ m/^\\/) {
2212                         $diff_class = " incomplete";
2213                 } elsif ($prefix =~ tr/+/+/) {
2214                         $diff_class = " add";
2215                 } elsif ($prefix =~ tr/-/-/) {
2216                         $diff_class = " rem";
2217                 }
2218         } else {
2219                 # assume ordinary diff
2220                 my $char = substr($line, 0, 1);
2221                 if ($char eq '+') {
2222                         $diff_class = " add";
2223                 } elsif ($char eq '-') {
2224                         $diff_class = " rem";
2225                 } elsif ($char eq '@') {
2226                         $diff_class = " chunk_header";
2227                 } elsif ($char eq "\\") {
2228                         $diff_class = " incomplete";
2229                 }
2230         }
2231         $line = untabify($line);
2232         if ($from && $to && $line =~ m/^\@{2} /) {
2233                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2234                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2235
2236                 $from_lines = 0 unless defined $from_lines;
2237                 $to_lines   = 0 unless defined $to_lines;
2238
2239                 if ($from->{'href'}) {
2240                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2241                                              -class=>"list"}, $from_text);
2242                 }
2243                 if ($to->{'href'}) {
2244                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2245                                              -class=>"list"}, $to_text);
2246                 }
2247                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2248                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2249                 return "<div class=\"diff$diff_class\">$line</div>\n";
2250         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2251                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2252                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2253
2254                 @from_text = split(' ', $ranges);
2255                 for (my $i = 0; $i < @from_text; ++$i) {
2256                         ($from_start[$i], $from_nlines[$i]) =
2257                                 (split(',', substr($from_text[$i], 1)), 0);
2258                 }
2259
2260                 $to_text   = pop @from_text;
2261                 $to_start  = pop @from_start;
2262                 $to_nlines = pop @from_nlines;
2263
2264                 $line = "<span class=\"chunk_info\">$prefix ";
2265                 for (my $i = 0; $i < @from_text; ++$i) {
2266                         if ($from->{'href'}[$i]) {
2267                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2268                                                   -class=>"list"}, $from_text[$i]);
2269                         } else {
2270                                 $line .= $from_text[$i];
2271                         }
2272                         $line .= " ";
2273                 }
2274                 if ($to->{'href'}) {
2275                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                           -class=>"list"}, $to_text);
2277                 } else {
2278                         $line .= $to_text;
2279                 }
2280                 $line .= " $prefix</span>" .
2281                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2282                 return "<div class=\"diff$diff_class\">$line</div>\n";
2283         }
2284         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2285 }
2286
2287 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2288 # linked.  Pass the hash of the tree/commit to snapshot.
2289 sub format_snapshot_links {
2290         my ($hash) = @_;
2291         my $num_fmts = @snapshot_fmts;
2292         if ($num_fmts > 1) {
2293                 # A parenthesized list of links bearing format names.
2294                 # e.g. "snapshot (_tar.gz_ _zip_)"
2295                 return "snapshot (" . join(' ', map
2296                         $cgi->a({
2297                                 -href => href(
2298                                         action=>"snapshot",
2299                                         hash=>$hash,
2300                                         snapshot_format=>$_
2301                                 )
2302                         }, $known_snapshot_formats{$_}{'display'})
2303                 , @snapshot_fmts) . ")";
2304         } elsif ($num_fmts == 1) {
2305                 # A single "snapshot" link whose tooltip bears the format name.
2306                 # i.e. "_snapshot_"
2307                 my ($fmt) = @snapshot_fmts;
2308                 return
2309                         $cgi->a({
2310                                 -href => href(
2311                                         action=>"snapshot",
2312                                         hash=>$hash,
2313                                         snapshot_format=>$fmt
2314                                 ),
2315                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2316                         }, "snapshot");
2317         } else { # $num_fmts == 0
2318                 return undef;
2319         }
2320 }
2321
2322 ## ......................................................................
2323 ## functions returning values to be passed, perhaps after some
2324 ## transformation, to other functions; e.g. returning arguments to href()
2325
2326 # returns hash to be passed to href to generate gitweb URL
2327 # in -title key it returns description of link
2328 sub get_feed_info {
2329         my $format = shift || 'Atom';
2330         my %res = (action => lc($format));
2331
2332         # feed links are possible only for project views
2333         return unless (defined $project);
2334         # some views should link to OPML, or to generic project feed,
2335         # or don't have specific feed yet (so they should use generic)
2336         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2337
2338         my $branch;
2339         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2340         # from tag links; this also makes possible to detect branch links
2341         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2342             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2343                 $branch = $1;
2344         }
2345         # find log type for feed description (title)
2346         my $type = 'log';
2347         if (defined $file_name) {
2348                 $type  = "history of $file_name";
2349                 $type .= "/" if ($action eq 'tree');
2350                 $type .= " on '$branch'" if (defined $branch);
2351         } else {
2352                 $type = "log of $branch" if (defined $branch);
2353         }
2354
2355         $res{-title} = $type;
2356         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2357         $res{'file_name'} = $file_name;
2358
2359         return %res;
2360 }
2361
2362 ## ----------------------------------------------------------------------
2363 ## git utility subroutines, invoking git commands
2364
2365 # returns path to the core git executable and the --git-dir parameter as list
2366 sub git_cmd {
2367         $number_of_git_cmds++;
2368         return $GIT, '--git-dir='.$git_dir;
2369 }
2370
2371 # quote the given arguments for passing them to the shell
2372 # quote_command("command", "arg 1", "arg with ' and ! characters")
2373 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2374 # Try to avoid using this function wherever possible.
2375 sub quote_command {
2376         return join(' ',
2377                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2378 }
2379
2380 # get HEAD ref of given project as hash
2381 sub git_get_head_hash {
2382         return git_get_full_hash(shift, 'HEAD');
2383 }
2384
2385 sub git_get_full_hash {
2386         return git_get_hash(@_);
2387 }
2388
2389 sub git_get_short_hash {
2390         return git_get_hash(@_, '--short=7');
2391 }
2392
2393 sub git_get_hash {
2394         my ($project, $hash, @options) = @_;
2395         my $o_git_dir = $git_dir;
2396         my $retval = undef;
2397         $git_dir = "$projectroot/$project";
2398         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2399             '--verify', '-q', @options, $hash) {
2400                 $retval = <$fd>;
2401                 chomp $retval if defined $retval;
2402                 close $fd;
2403         }
2404         if (defined $o_git_dir) {
2405                 $git_dir = $o_git_dir;
2406         }
2407         return $retval;
2408 }
2409
2410 # get type of given object
2411 sub git_get_type {
2412         my $hash = shift;
2413
2414         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2415         my $type = <$fd>;
2416         close $fd or return;
2417         chomp $type;
2418         return $type;
2419 }
2420
2421 # repository configuration
2422 our $config_file = '';
2423 our %config;
2424
2425 # store multiple values for single key as anonymous array reference
2426 # single values stored directly in the hash, not as [ <value> ]
2427 sub hash_set_multi {
2428         my ($hash, $key, $value) = @_;
2429
2430         if (!exists $hash->{$key}) {
2431                 $hash->{$key} = $value;
2432         } elsif (!ref $hash->{$key}) {
2433                 $hash->{$key} = [ $hash->{$key}, $value ];
2434         } else {
2435                 push @{$hash->{$key}}, $value;
2436         }
2437 }
2438
2439 # return hash of git project configuration
2440 # optionally limited to some section, e.g. 'gitweb'
2441 sub git_parse_project_config {
2442         my $section_regexp = shift;
2443         my %config;
2444
2445         local $/ = "\0";
2446
2447         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2448                 or return;
2449
2450         while (my $keyval = <$fh>) {
2451                 chomp $keyval;
2452                 my ($key, $value) = split(/\n/, $keyval, 2);
2453
2454                 hash_set_multi(\%config, $key, $value)
2455                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2456         }
2457         close $fh;
2458
2459         return %config;
2460 }
2461
2462 # convert config value to boolean: 'true' or 'false'
2463 # no value, number > 0, 'true' and 'yes' values are true
2464 # rest of values are treated as false (never as error)
2465 sub config_to_bool {
2466         my $val = shift;
2467
2468         return 1 if !defined $val;             # section.key
2469
2470         # strip leading and trailing whitespace
2471         $val =~ s/^\s+//;
2472         $val =~ s/\s+$//;
2473
2474         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2475                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2476 }
2477
2478 # convert config value to simple decimal number
2479 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2480 # to be multiplied by 1024, 1048576, or 1073741824
2481 sub config_to_int {
2482         my $val = shift;
2483
2484         # strip leading and trailing whitespace
2485         $val =~ s/^\s+//;
2486         $val =~ s/\s+$//;
2487
2488         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2489                 $unit = lc($unit);
2490                 # unknown unit is treated as 1
2491                 return $num * ($unit eq 'g' ? 1073741824 :
2492                                $unit eq 'm' ?    1048576 :
2493                                $unit eq 'k' ?       1024 : 1);
2494         }
2495         return $val;
2496 }
2497
2498 # convert config value to array reference, if needed
2499 sub config_to_multi {
2500         my $val = shift;
2501
2502         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2503 }
2504
2505 sub git_get_project_config {
2506         my ($key, $type) = @_;
2507
2508         return unless defined $git_dir;
2509
2510         # key sanity check
2511         return unless ($key);
2512         $key =~ s/^gitweb\.//;
2513         return if ($key =~ m/\W/);
2514
2515         # type sanity check
2516         if (defined $type) {
2517                 $type =~ s/^--//;
2518                 $type = undef
2519                         unless ($type eq 'bool' || $type eq 'int');
2520         }
2521
2522         # get config
2523         if (!defined $config_file ||
2524             $config_file ne "$git_dir/config") {
2525                 %config = git_parse_project_config('gitweb');
2526                 $config_file = "$git_dir/config";
2527         }
2528
2529         # check if config variable (key) exists
2530         return unless exists $config{"gitweb.$key"};
2531
2532         # ensure given type
2533         if (!defined $type) {
2534                 return $config{"gitweb.$key"};
2535         } elsif ($type eq 'bool') {
2536                 # backward compatibility: 'git config --bool' returns true/false
2537                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2538         } elsif ($type eq 'int') {
2539                 return config_to_int($config{"gitweb.$key"});
2540         }
2541         return $config{"gitweb.$key"};
2542 }
2543
2544 # get hash of given path at given ref
2545 sub git_get_hash_by_path {
2546         my $base = shift;
2547         my $path = shift || return undef;
2548         my $type = shift;
2549
2550         $path =~ s,/+$,,;
2551
2552         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2553                 or die_error(500, "Open git-ls-tree failed");
2554         my $line = <$fd>;
2555         close $fd or return undef;
2556
2557         if (!defined $line) {
2558                 # there is no tree or hash given by $path at $base
2559                 return undef;
2560         }
2561
2562         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2563         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2564         if (defined $type && $type ne $2) {
2565                 # type doesn't match
2566                 return undef;
2567         }
2568         return $3;
2569 }
2570
2571 # get path of entry with given hash at given tree-ish (ref)
2572 # used to get 'from' filename for combined diff (merge commit) for renames
2573 sub git_get_path_by_hash {
2574         my $base = shift || return;
2575         my $hash = shift || return;
2576
2577         local $/ = "\0";
2578
2579         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2580                 or return undef;
2581         while (my $line = <$fd>) {
2582                 chomp $line;
2583
2584                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2585                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2586                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2587                         close $fd;
2588                         return $1;
2589                 }
2590         }
2591         close $fd;
2592         return undef;
2593 }
2594
2595 ## ......................................................................
2596 ## git utility functions, directly accessing git repository
2597
2598 # get the value of config variable either from file named as the variable
2599 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2600 # configuration variable in the repository config file.
2601 sub git_get_file_or_project_config {
2602         my ($path, $name) = @_;
2603
2604         $git_dir = "$projectroot/$path";
2605         open my $fd, '<', "$git_dir/$name"
2606                 or return git_get_project_config($name);
2607         my $conf = <$fd>;
2608         close $fd;
2609         if (defined $conf) {
2610                 chomp $conf;
2611         }
2612         return $conf;
2613 }
2614
2615 sub git_get_project_description {
2616         my $path = shift;
2617         return git_get_file_or_project_config($path, 'description');
2618 }
2619
2620 sub git_get_project_category {
2621         my $path = shift;
2622         return git_get_file_or_project_config($path, 'category');
2623 }
2624
2625
2626 # supported formats:
2627 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2628 #   - if its contents is a number, use it as tag weight,
2629 #   - otherwise add a tag with weight 1
2630 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2631 #   the same value multiple times increases tag weight
2632 # * `gitweb.ctag' multi-valued repo config variable
2633 sub git_get_project_ctags {
2634         my $project = shift;
2635         my $ctags = {};
2636
2637         $git_dir = "$projectroot/$project";
2638         if (opendir my $dh, "$git_dir/ctags") {
2639                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2640                 foreach my $tagfile (@files) {
2641                         open my $ct, '<', $tagfile
2642                                 or next;
2643                         my $val = <$ct>;
2644                         chomp $val if $val;
2645                         close $ct;
2646
2647                         (my $ctag = $tagfile) =~ s#.*/##;
2648                         if ($val =~ /\d+/) {
2649                                 $ctags->{$ctag} = $val;
2650                         } else {
2651                                 $ctags->{$ctag} = 1;
2652                         }
2653                 }
2654                 closedir $dh;
2655
2656         } elsif (open my $fh, '<', "$git_dir/ctags") {
2657                 while (my $line = <$fh>) {
2658                         chomp $line;
2659                         $ctags->{$line}++ if $line;
2660                 }
2661                 close $fh;
2662
2663         } else {
2664                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2665                 foreach my $tag (@$taglist) {
2666                         $ctags->{$tag}++;
2667                 }
2668         }
2669
2670         return $ctags;
2671 }
2672
2673 # return hash, where keys are content tags ('ctags'),
2674 # and values are sum of weights of given tag in every project
2675 sub git_gather_all_ctags {
2676         my $projects = shift;
2677         my $ctags = {};
2678
2679         foreach my $p (@$projects) {
2680                 foreach my $ct (keys %{$p->{'ctags'}}) {
2681                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2682                 }
2683         }
2684
2685         return $ctags;
2686 }
2687
2688 sub git_populate_project_tagcloud {
2689         my $ctags = shift;
2690
2691         # First, merge different-cased tags; tags vote on casing
2692         my %ctags_lc;
2693         foreach (keys %$ctags) {
2694                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2695                 if (not $ctags_lc{lc $_}->{topcount}
2696                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2697                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2698                         $ctags_lc{lc $_}->{topname} = $_;
2699                 }
2700         }
2701
2702         my $cloud;
2703         my $matched = $cgi->param('by_tag');
2704         if (eval { require HTML::TagCloud; 1; }) {
2705                 $cloud = HTML::TagCloud->new;
2706                 foreach my $ctag (sort keys %ctags_lc) {
2707                         # Pad the title with spaces so that the cloud looks
2708                         # less crammed.
2709                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2710                         $title =~ s/ /&nbsp;/g;
2711                         $title =~ s/^/&nbsp;/g;
2712                         $title =~ s/$/&nbsp;/g;
2713                         if (defined $matched && $matched eq $ctag) {
2714                                 $title = qq(<span class="match">$title</span>);
2715                         }
2716                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2717                                     $ctags_lc{$ctag}->{count});
2718                 }
2719         } else {
2720                 $cloud = {};
2721                 foreach my $ctag (keys %ctags_lc) {
2722                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2723                         if (defined $matched && $matched eq $ctag) {
2724                                 $title = qq(<span class="match">$title</span>);
2725                         }
2726                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2727                         $cloud->{$ctag}{ctag} =
2728                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2729                 }
2730         }
2731         return $cloud;
2732 }
2733
2734 sub git_show_project_tagcloud {
2735         my ($cloud, $count) = @_;
2736         if (ref $cloud eq 'HTML::TagCloud') {
2737                 return $cloud->html_and_css($count);
2738         } else {
2739                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2740                 return
2741                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2742                         join (', ', map {
2743                                 $cloud->{$_}->{'ctag'}
2744                         } splice(@tags, 0, $count)) .
2745                         '</div>';
2746         }
2747 }
2748
2749 sub git_get_project_url_list {
2750         my $path = shift;
2751
2752         $git_dir = "$projectroot/$path";
2753         open my $fd, '<', "$git_dir/cloneurl"
2754                 or return wantarray ?
2755                 @{ config_to_multi(git_get_project_config('url')) } :
2756                    config_to_multi(git_get_project_config('url'));
2757         my @git_project_url_list = map { chomp; $_ } <$fd>;
2758         close $fd;
2759
2760         return wantarray ? @git_project_url_list : \@git_project_url_list;
2761 }
2762
2763 sub git_get_projects_list {
2764         my $filter = shift || '';
2765         my @list;
2766
2767         $filter =~ s/\.git$//;
2768
2769         if (-d $projects_list) {
2770                 # search in directory
2771                 my $dir = $projects_list;
2772                 # remove the trailing "/"
2773                 $dir =~ s!/+$!!;
2774                 my $pfxlen = length("$projects_list");
2775                 my $pfxdepth = ($projects_list =~ tr!/!!);
2776                 # when filtering, search only given subdirectory
2777                 if ($filter) {
2778                         $dir .= "/$filter";
2779                         $dir =~ s!/+$!!;
2780                 }
2781
2782                 File::Find::find({
2783                         follow_fast => 1, # follow symbolic links
2784                         follow_skip => 2, # ignore duplicates
2785                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2786                         wanted => sub {
2787                                 # global variables
2788                                 our $project_maxdepth;
2789                                 our $projectroot;
2790                                 # skip project-list toplevel, if we get it.
2791                                 return if (m!^[/.]$!);
2792                                 # only directories can be git repositories
2793                                 return unless (-d $_);
2794                                 # don't traverse too deep (Find is super slow on os x)
2795                                 # $project_maxdepth excludes depth of $projectroot
2796                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2797                                         $File::Find::prune = 1;
2798                                         return;
2799                                 }
2800
2801                                 my $path = substr($File::Find::name, $pfxlen + 1);
2802                                 # we check related file in $projectroot
2803                                 if (check_export_ok("$projectroot/$path")) {
2804                                         push @list, { path => $path };
2805                                         $File::Find::prune = 1;
2806                                 }
2807                         },
2808                 }, "$dir");
2809
2810         } elsif (-f $projects_list) {
2811                 # read from file(url-encoded):
2812                 # 'git%2Fgit.git Linus+Torvalds'
2813                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2814                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2815                 open my $fd, '<', $projects_list or return;
2816         PROJECT:
2817                 while (my $line = <$fd>) {
2818                         chomp $line;
2819                         my ($path, $owner) = split ' ', $line;
2820                         $path = unescape($path);
2821                         $owner = unescape($owner);
2822                         if (!defined $path) {
2823                                 next;
2824                         }
2825                         # if $filter is rpovided, check if $path begins with $filter
2826                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2827                                 next;
2828                         }
2829                         if (check_export_ok("$projectroot/$path")) {
2830                                 my $pr = {
2831                                         path => $path,
2832                                         owner => to_utf8($owner),
2833                                 };
2834                                 push @list, $pr;
2835                         }
2836                 }
2837                 close $fd;
2838         }
2839         return @list;
2840 }
2841
2842 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2843 # as side effects it sets 'forks' field to list of forks for forked projects
2844 sub filter_forks_from_projects_list {
2845         my $projects = shift;
2846
2847         my %trie; # prefix tree of directories (path components)
2848         # generate trie out of those directories that might contain forks
2849         foreach my $pr (@$projects) {
2850                 my $path = $pr->{'path'};
2851                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2852                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2853                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2854                 next unless (-d $path);   # containing directory exists
2855                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2856
2857                 # add to trie
2858                 my @dirs = split('/', $path);
2859                 # walk the trie, until either runs out of components or out of trie
2860                 my $ref = \%trie;
2861                 while (scalar @dirs &&
2862                        exists($ref->{$dirs[0]})) {
2863                         $ref = $ref->{shift @dirs};
2864                 }
2865                 # create rest of trie structure from rest of components
2866                 foreach my $dir (@dirs) {
2867                         $ref = $ref->{$dir} = {};
2868                 }
2869                 # create end marker, store $pr as a data
2870                 $ref->{''} = $pr if (!exists $ref->{''});
2871         }
2872
2873         # filter out forks, by finding shortest prefix match for paths
2874         my @filtered;
2875  PROJECT:
2876         foreach my $pr (@$projects) {
2877                 # trie lookup
2878                 my $ref = \%trie;
2879         DIR:
2880                 foreach my $dir (split('/', $pr->{'path'})) {
2881                         if (exists $ref->{''}) {
2882                                 # found [shortest] prefix, is a fork - skip it
2883                                 push @{$ref->{''}{'forks'}}, $pr;
2884                                 next PROJECT;
2885                         }
2886                         if (!exists $ref->{$dir}) {
2887                                 # not in trie, cannot have prefix, not a fork
2888                                 push @filtered, $pr;
2889                                 next PROJECT;
2890                         }
2891                         # If the dir is there, we just walk one step down the trie.
2892                         $ref = $ref->{$dir};
2893                 }
2894                 # we ran out of trie
2895                 # (shouldn't happen: it's either no match, or end marker)
2896                 push @filtered, $pr;
2897         }
2898
2899         return @filtered;
2900 }
2901
2902 # note: fill_project_list_info must be run first,
2903 # for 'descr_long' and 'ctags' to be filled
2904 sub search_projects_list {
2905         my ($projlist, %opts) = @_;
2906         my $tagfilter  = $opts{'tagfilter'};
2907         my $searchtext = $opts{'searchtext'};
2908
2909         return @$projlist
2910                 unless ($tagfilter || $searchtext);
2911
2912         my @projects;
2913  PROJECT:
2914         foreach my $pr (@$projlist) {
2915
2916                 if ($tagfilter) {
2917                         next unless ref($pr->{'ctags'}) eq 'HASH';
2918                         next unless
2919                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2920                 }
2921
2922                 if ($searchtext) {
2923                         next unless
2924                                 $pr->{'path'} =~ /$searchtext/ ||
2925                                 $pr->{'descr_long'} =~ /$searchtext/;
2926                 }
2927
2928                 push @projects, $pr;
2929         }
2930
2931         return @projects;
2932 }
2933
2934 our $gitweb_project_owner = undef;
2935 sub git_get_project_list_from_file {
2936
2937         return if (defined $gitweb_project_owner);
2938
2939         $gitweb_project_owner = {};
2940         # read from file (url-encoded):
2941         # 'git%2Fgit.git Linus+Torvalds'
2942         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2943         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2944         if (-f $projects_list) {
2945                 open(my $fd, '<', $projects_list);
2946                 while (my $line = <$fd>) {
2947                         chomp $line;
2948                         my ($pr, $ow) = split ' ', $line;
2949                         $pr = unescape($pr);
2950                         $ow = unescape($ow);
2951                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2952                 }
2953                 close $fd;
2954         }
2955 }
2956
2957 sub git_get_project_owner {
2958         my $project = shift;
2959         my $owner;
2960
2961         return undef unless $project;
2962         $git_dir = "$projectroot/$project";
2963
2964         if (!defined $gitweb_project_owner) {
2965                 git_get_project_list_from_file();
2966         }
2967
2968         if (exists $gitweb_project_owner->{$project}) {
2969                 $owner = $gitweb_project_owner->{$project};
2970         }
2971         if (!defined $owner){
2972                 $owner = git_get_project_config('owner');
2973         }
2974         if (!defined $owner) {
2975                 $owner = get_file_owner("$git_dir");
2976         }
2977
2978         return $owner;
2979 }
2980
2981 sub git_get_last_activity {
2982         my ($path) = @_;
2983         my $fd;
2984
2985         $git_dir = "$projectroot/$path";
2986         open($fd, "-|", git_cmd(), 'for-each-ref',
2987              '--format=%(committer)',
2988              '--sort=-committerdate',
2989              '--count=1',
2990              'refs/heads') or return;
2991         my $most_recent = <$fd>;
2992         close $fd or return;
2993         if (defined $most_recent &&
2994             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2995                 my $timestamp = $1;
2996                 my $age = time - $timestamp;
2997                 return ($age, age_string($age));
2998         }
2999         return (undef, undef);
3000 }
3001
3002 # Implementation note: when a single remote is wanted, we cannot use 'git
3003 # remote show -n' because that command always work (assuming it's a remote URL
3004 # if it's not defined), and we cannot use 'git remote show' because that would
3005 # try to make a network roundtrip. So the only way to find if that particular
3006 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3007 # and when we find what we want.
3008 sub git_get_remotes_list {
3009         my $wanted = shift;
3010         my %remotes = ();
3011
3012         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3013         return unless $fd;
3014         while (my $remote = <$fd>) {
3015                 chomp $remote;
3016                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3017                 next if $wanted and not $remote eq $wanted;
3018                 my ($url, $key) = ($1, $2);
3019
3020                 $remotes{$remote} ||= { 'heads' => () };
3021                 $remotes{$remote}{$key} = $url;
3022         }
3023         close $fd or return;
3024         return wantarray ? %remotes : \%remotes;
3025 }
3026
3027 # Takes a hash of remotes as first parameter and fills it by adding the
3028 # available remote heads for each of the indicated remotes.
3029 sub fill_remote_heads {
3030         my $remotes = shift;
3031         my @heads = map { "remotes/$_" } keys %$remotes;
3032         my @remoteheads = git_get_heads_list(undef, @heads);
3033         foreach my $remote (keys %$remotes) {
3034                 $remotes->{$remote}{'heads'} = [ grep {
3035                         $_->{'name'} =~ s!^$remote/!!
3036                         } @remoteheads ];
3037         }
3038 }
3039
3040 sub git_get_references {
3041         my $type = shift || "";
3042         my %refs;
3043         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3044         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3045         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3046                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3047                 or return;
3048
3049         while (my $line = <$fd>) {
3050                 chomp $line;
3051                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3052                         if (defined $refs{$1}) {
3053                                 push @{$refs{$1}}, $2;
3054                         } else {
3055                                 $refs{$1} = [ $2 ];
3056                         }
3057                 }
3058         }
3059         close $fd or return;
3060         return \%refs;
3061 }
3062
3063 sub git_get_rev_name_tags {
3064         my $hash = shift || return undef;
3065
3066         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3067                 or return;
3068         my $name_rev = <$fd>;
3069         close $fd;
3070
3071         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3072                 return $1;
3073         } else {
3074                 # catches also '$hash undefined' output
3075                 return undef;
3076         }
3077 }
3078
3079 ## ----------------------------------------------------------------------
3080 ## parse to hash functions
3081
3082 sub parse_date {
3083         my $epoch = shift;
3084         my $tz = shift || "-0000";
3085
3086         my %date;
3087         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3088         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3089         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3090         $date{'hour'} = $hour;
3091         $date{'minute'} = $min;
3092         $date{'mday'} = $mday;
3093         $date{'day'} = $days[$wday];
3094         $date{'month'} = $months[$mon];
3095         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3096                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3097         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3098                              $mday, $months[$mon], $hour ,$min;
3099         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3100                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3101
3102         my ($tz_sign, $tz_hour, $tz_min) =
3103                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3104         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3105         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3106         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3107         $date{'hour_local'} = $hour;
3108         $date{'minute_local'} = $min;
3109         $date{'tz_local'} = $tz;
3110         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3111                                   1900+$year, $mon+1, $mday,
3112                                   $hour, $min, $sec, $tz);
3113         return %date;
3114 }
3115
3116 sub parse_tag {
3117         my $tag_id = shift;
3118         my %tag;
3119         my @comment;
3120
3121         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3122         $tag{'id'} = $tag_id;
3123         while (my $line = <$fd>) {
3124                 chomp $line;
3125                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3126                         $tag{'object'} = $1;
3127                 } elsif ($line =~ m/^type (.+)$/) {
3128                         $tag{'type'} = $1;
3129                 } elsif ($line =~ m/^tag (.+)$/) {
3130                         $tag{'name'} = $1;
3131                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3132                         $tag{'author'} = $1;
3133                         $tag{'author_epoch'} = $2;
3134                         $tag{'author_tz'} = $3;
3135                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3136                                 $tag{'author_name'}  = $1;
3137                                 $tag{'author_email'} = $2;
3138                         } else {
3139                                 $tag{'author_name'} = $tag{'author'};
3140                         }
3141                 } elsif ($line =~ m/--BEGIN/) {
3142                         push @comment, $line;
3143                         last;
3144                 } elsif ($line eq "") {
3145                         last;
3146                 }
3147         }
3148         push @comment, <$fd>;
3149         $tag{'comment'} = \@comment;
3150         close $fd or return;
3151         if (!defined $tag{'name'}) {
3152                 return
3153         };
3154         return %tag
3155 }
3156
3157 sub parse_commit_text {
3158         my ($commit_text, $withparents) = @_;
3159         my @commit_lines = split '\n', $commit_text;
3160         my %co;
3161
3162         pop @commit_lines; # Remove '\0'
3163
3164         if (! @commit_lines) {
3165                 return;
3166         }
3167
3168         my $header = shift @commit_lines;
3169         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3170                 return;
3171         }
3172         ($co{'id'}, my @parents) = split ' ', $header;
3173         while (my $line = shift @commit_lines) {
3174                 last if $line eq "\n";
3175                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3176                         $co{'tree'} = $1;
3177                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3178                         push @parents, $1;
3179                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3180                         $co{'author'} = to_utf8($1);
3181                         $co{'author_epoch'} = $2;
3182                         $co{'author_tz'} = $3;
3183                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3184                                 $co{'author_name'}  = $1;
3185                                 $co{'author_email'} = $2;
3186                         } else {
3187                                 $co{'author_name'} = $co{'author'};
3188                         }
3189                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3190                         $co{'committer'} = to_utf8($1);
3191                         $co{'committer_epoch'} = $2;
3192                         $co{'committer_tz'} = $3;
3193                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3194                                 $co{'committer_name'}  = $1;
3195                                 $co{'committer_email'} = $2;
3196                         } else {
3197                                 $co{'committer_name'} = $co{'committer'};
3198                         }
3199                 }
3200         }
3201         if (!defined $co{'tree'}) {
3202                 return;
3203         };
3204         $co{'parents'} = \@parents;
3205         $co{'parent'} = $parents[0];
3206
3207         foreach my $title (@commit_lines) {
3208                 $title =~ s/^    //;
3209                 if ($title ne "") {
3210                         $co{'title'} = chop_str($title, 80, 5);
3211                         # remove leading stuff of merges to make the interesting part visible
3212                         if (length($title) > 50) {
3213                                 $title =~ s/^Automatic //;
3214                                 $title =~ s/^merge (of|with) /Merge ... /i;
3215                                 if (length($title) > 50) {
3216                                         $title =~ s/(http|rsync):\/\///;
3217                                 }
3218                                 if (length($title) > 50) {
3219                                         $title =~ s/(master|www|rsync)\.//;
3220                                 }
3221                                 if (length($title) > 50) {
3222                                         $title =~ s/kernel.org:?//;
3223                                 }
3224                                 if (length($title) > 50) {
3225                                         $title =~ s/\/pub\/scm//;
3226                                 }
3227                         }
3228                         $co{'title_short'} = chop_str($title, 50, 5);
3229                         last;
3230                 }
3231         }
3232         if (! defined $co{'title'} || $co{'title'} eq "") {
3233                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3234         }
3235         # remove added spaces
3236         foreach my $line (@commit_lines) {
3237                 $line =~ s/^    //;
3238         }
3239         $co{'comment'} = \@commit_lines;
3240
3241         my $age = time - $co{'committer_epoch'};
3242         $co{'age'} = $age;
3243         $co{'age_string'} = age_string($age);
3244         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3245         if ($age > 60*60*24*7*2) {
3246                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3247                 $co{'age_string_age'} = $co{'age_string'};
3248         } else {
3249                 $co{'age_string_date'} = $co{'age_string'};
3250                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3251         }
3252         return %co;
3253 }
3254
3255 sub parse_commit {
3256         my ($commit_id) = @_;
3257         my %co;
3258
3259         local $/ = "\0";
3260
3261         open my $fd, "-|", git_cmd(), "rev-list",
3262                 "--parents",
3263                 "--header",
3264                 "--max-count=1",
3265                 $commit_id,
3266                 "--",
3267                 or die_error(500, "Open git-rev-list failed");
3268         %co = parse_commit_text(<$fd>, 1);
3269         close $fd;
3270
3271         return %co;
3272 }
3273
3274 sub parse_commits {
3275         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3276         my @cos;
3277
3278         $maxcount ||= 1;
3279         $skip ||= 0;
3280
3281         local $/ = "\0";
3282
3283         open my $fd, "-|", git_cmd(), "rev-list",
3284                 "--header",
3285                 @args,
3286                 ("--max-count=" . $maxcount),
3287                 ("--skip=" . $skip),
3288                 @extra_options,
3289                 $commit_id,
3290                 "--",
3291                 ($filename ? ($filename) : ())
3292                 or die_error(500, "Open git-rev-list failed");
3293         while (my $line = <$fd>) {
3294                 my %co = parse_commit_text($line);
3295                 push @cos, \%co;
3296         }
3297         close $fd;
3298
3299         return wantarray ? @cos : \@cos;
3300 }
3301
3302 # parse line of git-diff-tree "raw" output
3303 sub parse_difftree_raw_line {
3304         my $line = shift;
3305         my %res;
3306
3307         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3308         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3309         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3310                 $res{'from_mode'} = $1;
3311                 $res{'to_mode'} = $2;
3312                 $res{'from_id'} = $3;
3313                 $res{'to_id'} = $4;
3314                 $res{'status'} = $5;
3315                 $res{'similarity'} = $6;
3316                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3317                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3318                 } else {
3319                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3320                 }
3321         }
3322         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3323         # combined diff (for merge commit)
3324         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3325                 $res{'nparents'}  = length($1);
3326                 $res{'from_mode'} = [ split(' ', $2) ];
3327                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3328                 $res{'from_id'} = [ split(' ', $3) ];
3329                 $res{'to_id'} = pop @{$res{'from_id'}};
3330                 $res{'status'} = [ split('', $4) ];
3331                 $res{'to_file'} = unquote($5);
3332         }
3333         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3334         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3335                 $res{'commit'} = $1;
3336         }
3337
3338         return wantarray ? %res : \%res;
3339 }
3340
3341 # wrapper: return parsed line of git-diff-tree "raw" output
3342 # (the argument might be raw line, or parsed info)
3343 sub parsed_difftree_line {
3344         my $line_or_ref = shift;
3345
3346         if (ref($line_or_ref) eq "HASH") {
3347                 # pre-parsed (or generated by hand)
3348                 return $line_or_ref;
3349         } else {
3350                 return parse_difftree_raw_line($line_or_ref);
3351         }
3352 }
3353
3354 # parse line of git-ls-tree output
3355 sub parse_ls_tree_line {
3356         my $line = shift;
3357         my %opts = @_;
3358         my %res;
3359
3360         if ($opts{'-l'}) {
3361                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3362                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3363
3364                 $res{'mode'} = $1;
3365                 $res{'type'} = $2;
3366                 $res{'hash'} = $3;
3367                 $res{'size'} = $4;
3368                 if ($opts{'-z'}) {
3369                         $res{'name'} = $5;
3370                 } else {
3371                         $res{'name'} = unquote($5);
3372                 }
3373         } else {
3374                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3375                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3376
3377                 $res{'mode'} = $1;
3378                 $res{'type'} = $2;
3379                 $res{'hash'} = $3;
3380                 if ($opts{'-z'}) {
3381                         $res{'name'} = $4;
3382                 } else {
3383                         $res{'name'} = unquote($4);
3384                 }
3385         }
3386
3387         return wantarray ? %res : \%res;
3388 }
3389
3390 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3391 sub parse_from_to_diffinfo {
3392         my ($diffinfo, $from, $to, @parents) = @_;
3393
3394         if ($diffinfo->{'nparents'}) {
3395                 # combined diff
3396                 $from->{'file'} = [];
3397                 $from->{'href'} = [];
3398                 fill_from_file_info($diffinfo, @parents)
3399                         unless exists $diffinfo->{'from_file'};
3400                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3401                         $from->{'file'}[$i] =
3402                                 defined $diffinfo->{'from_file'}[$i] ?
3403                                         $diffinfo->{'from_file'}[$i] :
3404                                         $diffinfo->{'to_file'};
3405                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3406                                 $from->{'href'}[$i] = href(action=>"blob",
3407                                                            hash_base=>$parents[$i],
3408                                                            hash=>$diffinfo->{'from_id'}[$i],
3409                                                            file_name=>$from->{'file'}[$i]);
3410                         } else {
3411                                 $from->{'href'}[$i] = undef;
3412                         }
3413                 }
3414         } else {
3415                 # ordinary (not combined) diff
3416                 $from->{'file'} = $diffinfo->{'from_file'};
3417                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3418                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3419                                                hash=>$diffinfo->{'from_id'},
3420                                                file_name=>$from->{'file'});
3421                 } else {
3422                         delete $from->{'href'};
3423                 }
3424         }
3425
3426         $to->{'file'} = $diffinfo->{'to_file'};
3427         if (!is_deleted($diffinfo)) { # file exists in result
3428                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3429                                      hash=>$diffinfo->{'to_id'},
3430                                      file_name=>$to->{'file'});
3431         } else {
3432                 delete $to->{'href'};
3433         }
3434 }
3435
3436 ## ......................................................................
3437 ## parse to array of hashes functions
3438
3439 sub git_get_heads_list {
3440         my ($limit, @classes) = @_;
3441         @classes = ('heads') unless @classes;
3442         my @patterns = map { "refs/$_" } @classes;
3443         my @headslist;
3444
3445         open my $fd, '-|', git_cmd(), 'for-each-ref',
3446                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3447                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3448                 @patterns
3449                 or return;
3450         while (my $line = <$fd>) {
3451                 my %ref_item;
3452
3453                 chomp $line;
3454                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3455                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3456                 my ($committer, $epoch, $tz) =
3457                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3458                 $ref_item{'fullname'}  = $name;
3459                 $name =~ s!^refs/(?:head|remote)s/!!;
3460
3461                 $ref_item{'name'}  = $name;
3462                 $ref_item{'id'}    = $hash;
3463                 $ref_item{'title'} = $title || '(no commit message)';
3464                 $ref_item{'epoch'} = $epoch;
3465                 if ($epoch) {
3466                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3467                 } else {
3468                         $ref_item{'age'} = "unknown";
3469                 }
3470
3471                 push @headslist, \%ref_item;
3472         }
3473         close $fd;
3474
3475         return wantarray ? @headslist : \@headslist;
3476 }
3477
3478 sub git_get_tags_list {
3479         my $limit = shift;
3480         my @tagslist;
3481
3482         open my $fd, '-|', git_cmd(), 'for-each-ref',
3483                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3484                 '--format=%(objectname) %(objecttype) %(refname) '.
3485                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3486                 'refs/tags'
3487                 or return;
3488         while (my $line = <$fd>) {
3489                 my %ref_item;
3490
3491                 chomp $line;
3492                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3493                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3494                 my ($creator, $epoch, $tz) =
3495                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3496                 $ref_item{'fullname'} = $name;
3497                 $name =~ s!^refs/tags/!!;
3498
3499                 $ref_item{'type'} = $type;
3500                 $ref_item{'id'} = $id;
3501                 $ref_item{'name'} = $name;
3502                 if ($type eq "tag") {
3503                         $ref_item{'subject'} = $title;
3504                         $ref_item{'reftype'} = $reftype;
3505                         $ref_item{'refid'}   = $refid;
3506                 } else {
3507                         $ref_item{'reftype'} = $type;
3508                         $ref_item{'refid'}   = $id;
3509                 }
3510
3511                 if ($type eq "tag" || $type eq "commit") {
3512                         $ref_item{'epoch'} = $epoch;
3513                         if ($epoch) {
3514                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3515                         } else {
3516                                 $ref_item{'age'} = "unknown";
3517                         }
3518                 }
3519
3520                 push @tagslist, \%ref_item;
3521         }
3522         close $fd;
3523
3524         return wantarray ? @tagslist : \@tagslist;
3525 }
3526
3527 ## ----------------------------------------------------------------------
3528 ## filesystem-related functions
3529
3530 sub get_file_owner {
3531         my $path = shift;
3532
3533         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3534         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3535         if (!defined $gcos) {
3536                 return undef;
3537         }
3538         my $owner = $gcos;
3539         $owner =~ s/[,;].*$//;
3540         return to_utf8($owner);
3541 }
3542
3543 # assume that file exists
3544 sub insert_file {
3545         my $filename = shift;
3546
3547         open my $fd, '<', $filename;
3548         print map { to_utf8($_) } <$fd>;
3549         close $fd;
3550 }
3551
3552 ## ......................................................................
3553 ## mimetype related functions
3554
3555 sub mimetype_guess_file {
3556         my $filename = shift;
3557         my $mimemap = shift;
3558         -r $mimemap or return undef;
3559
3560         my %mimemap;
3561         open(my $mh, '<', $mimemap) or return undef;
3562         while (<$mh>) {
3563                 next if m/^#/; # skip comments
3564                 my ($mimetype, $exts) = split(/\t+/);
3565                 if (defined $exts) {
3566                         my @exts = split(/\s+/, $exts);
3567                         foreach my $ext (@exts) {
3568                                 $mimemap{$ext} = $mimetype;
3569                         }
3570                 }
3571         }
3572         close($mh);
3573
3574         $filename =~ /\.([^.]*)$/;
3575         return $mimemap{$1};
3576 }
3577
3578 sub mimetype_guess {
3579         my $filename = shift;
3580         my $mime;
3581         $filename =~ /\./ or return undef;
3582
3583         if ($mimetypes_file) {
3584                 my $file = $mimetypes_file;
3585                 if ($file !~ m!^/!) { # if it is relative path
3586                         # it is relative to project
3587                         $file = "$projectroot/$project/$file";
3588                 }
3589                 $mime = mimetype_guess_file($filename, $file);
3590         }
3591         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3592         return $mime;
3593 }
3594
3595 sub blob_mimetype {
3596         my $fd = shift;
3597         my $filename = shift;
3598
3599         if ($filename) {
3600                 my $mime = mimetype_guess($filename);
3601                 $mime and return $mime;
3602         }
3603
3604         # just in case
3605         return $default_blob_plain_mimetype unless $fd;
3606
3607         if (-T $fd) {
3608                 return 'text/plain';
3609         } elsif (! $filename) {
3610                 return 'application/octet-stream';
3611         } elsif ($filename =~ m/\.png$/i) {
3612                 return 'image/png';
3613         } elsif ($filename =~ m/\.gif$/i) {
3614                 return 'image/gif';
3615         } elsif ($filename =~ m/\.jpe?g$/i) {
3616                 return 'image/jpeg';
3617         } else {
3618                 return 'application/octet-stream';
3619         }
3620 }
3621
3622 sub blob_contenttype {
3623         my ($fd, $file_name, $type) = @_;
3624
3625         $type ||= blob_mimetype($fd, $file_name);
3626         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3627                 $type .= "; charset=$default_text_plain_charset";
3628         }
3629
3630         return $type;
3631 }
3632
3633 # guess file syntax for syntax highlighting; return undef if no highlighting
3634 # the name of syntax can (in the future) depend on syntax highlighter used
3635 sub guess_file_syntax {
3636         my ($highlight, $mimetype, $file_name) = @_;
3637         return undef unless ($highlight && defined $file_name);
3638         my $basename = basename($file_name, '.in');
3639         return $highlight_basename{$basename}
3640                 if exists $highlight_basename{$basename};
3641
3642         $basename =~ /\.([^.]*)$/;
3643         my $ext = $1 or return undef;
3644         return $highlight_ext{$ext}
3645                 if exists $highlight_ext{$ext};
3646
3647         return undef;
3648 }
3649
3650 # run highlighter and return FD of its output,
3651 # or return original FD if no highlighting
3652 sub run_highlighter {
3653         my ($fd, $highlight, $syntax) = @_;
3654         return $fd unless ($highlight && defined $syntax);
3655
3656         close $fd;
3657         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3658                   quote_command($highlight_bin).
3659                   " --replace-tabs=8 --fragment --syntax $syntax |"
3660                 or die_error(500, "Couldn't open file or run syntax highlighter");
3661         return $fd;
3662 }
3663
3664 ## ======================================================================
3665 ## functions printing HTML: header, footer, error page
3666
3667 sub get_page_title {
3668         my $title = to_utf8($site_name);
3669
3670         return $title unless (defined $project);
3671         $title .= " - " . to_utf8($project);
3672
3673         return $title unless (defined $action);
3674         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3675
3676         return $title unless (defined $file_name);
3677         $title .= " - " . esc_path($file_name);
3678         if ($action eq "tree" && $file_name !~ m|/$|) {
3679                 $title .= "/";
3680         }
3681
3682         return $title;
3683 }
3684
3685 sub print_feed_meta {
3686         if (defined $project) {
3687                 my %href_params = get_feed_info();
3688                 if (!exists $href_params{'-title'}) {
3689                         $href_params{'-title'} = 'log';
3690                 }
3691
3692                 foreach my $format (qw(RSS Atom)) {
3693                         my $type = lc($format);
3694                         my %link_attr = (
3695                                 '-rel' => 'alternate',
3696                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3697                                 '-type' => "application/$type+xml"
3698                         );
3699
3700                         $href_params{'action'} = $type;
3701                         $link_attr{'-href'} = href(%href_params);
3702                         print "<link ".
3703                               "rel=\"$link_attr{'-rel'}\" ".
3704                               "title=\"$link_attr{'-title'}\" ".
3705                               "href=\"$link_attr{'-href'}\" ".
3706                               "type=\"$link_attr{'-type'}\" ".
3707                               "/>\n";
3708
3709                         $href_params{'extra_options'} = '--no-merges';
3710                         $link_attr{'-href'} = href(%href_params);
3711                         $link_attr{'-title'} .= ' (no merges)';
3712                         print "<link ".
3713                               "rel=\"$link_attr{'-rel'}\" ".
3714                               "title=\"$link_attr{'-title'}\" ".
3715                               "href=\"$link_attr{'-href'}\" ".
3716                               "type=\"$link_attr{'-type'}\" ".
3717                               "/>\n";
3718                 }
3719
3720         } else {
3721                 printf('<link rel="alternate" title="%s projects list" '.
3722                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3723                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3724                 printf('<link rel="alternate" title="%s projects feeds" '.
3725                        'href="%s" type="text/x-opml" />'."\n",
3726                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3727         }
3728 }
3729
3730 sub git_header_html {
3731         my $status = shift || "200 OK";
3732         my $expires = shift;
3733         my %opts = @_;
3734
3735         my $title = get_page_title();
3736         my $content_type;
3737         # require explicit support from the UA if we are to send the page as
3738         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3739         # we have to do this because MSIE sometimes globs '*/*', pretending to
3740         # support xhtml+xml but choking when it gets what it asked for.
3741         if (defined $cgi->http('HTTP_ACCEPT') &&
3742             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3743             $cgi->Accept('application/xhtml+xml') != 0) {
3744                 $content_type = 'application/xhtml+xml';
3745         } else {
3746                 $content_type = 'text/html';
3747         }
3748         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3749                            -status=> $status, -expires => $expires)
3750                 unless ($opts{'-no_http_header'});
3751         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3752         print <<EOF;
3753 <?xml version="1.0" encoding="utf-8"?>
3754 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3755 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3756 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3757 <!-- git core binaries version $git_version -->
3758 <head>
3759 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3760 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3761 <meta name="robots" content="index, nofollow"/>
3762 <title>$title</title>
3763 EOF
3764         # the stylesheet, favicon etc urls won't work correctly with path_info
3765         # unless we set the appropriate base URL
3766         if ($ENV{'PATH_INFO'}) {
3767                 print "<base href=\"".esc_url($base_url)."\" />\n";
3768         }
3769         # print out each stylesheet that exist, providing backwards capability
3770         # for those people who defined $stylesheet in a config file
3771         if (defined $stylesheet) {
3772                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3773         } else {
3774                 foreach my $stylesheet (@stylesheets) {
3775                         next unless $stylesheet;
3776                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3777                 }
3778         }
3779         print_feed_meta()
3780                 if ($status eq '200 OK');
3781         if (defined $favicon) {
3782                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3783         }
3784
3785         print "</head>\n" .
3786               "<body>\n";
3787
3788         if (defined $site_header && -f $site_header) {
3789                 insert_file($site_header);
3790         }
3791
3792         print "<div class=\"page_header\">\n";
3793         if (defined $logo) {
3794                 print $cgi->a({-href => esc_url($logo_url),
3795                                -title => $logo_label},
3796                               $cgi->img({-src => esc_url($logo),
3797                                          -width => 72, -height => 27,
3798                                          -alt => "git",
3799                                          -class => "logo"}));
3800         }
3801         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3802         if (defined $project) {
3803                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3804                 if (defined $action) {
3805                         my $action_print = $action ;
3806                         if (defined $opts{-action_extra}) {
3807                                 $action_print = $cgi->a({-href => href(action=>$action)},
3808                                         $action);
3809                         }
3810                         print " / $action_print";
3811                 }
3812                 if (defined $opts{-action_extra}) {
3813                         print " / $opts{-action_extra}";
3814                 }
3815                 print "\n";
3816         }
3817         print "</div>\n";
3818
3819         my $have_search = gitweb_check_feature('search');
3820         if (defined $project && $have_search) {
3821                 if (!defined $searchtext) {
3822                         $searchtext = "";
3823                 }
3824                 my $search_hash;
3825                 if (defined $hash_base) {
3826                         $search_hash = $hash_base;
3827                 } elsif (defined $hash) {
3828                         $search_hash = $hash;
3829                 } else {
3830                         $search_hash = "HEAD";
3831                 }
3832                 my $action = $my_uri;
3833                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3834                 if ($use_pathinfo) {
3835                         $action .= "/".esc_url($project);
3836                 }
3837                 print $cgi->startform(-method => "get", -action => $action) .
3838                       "<div class=\"search\">\n" .
3839                       (!$use_pathinfo &&
3840                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3841                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3842                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3843                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3844                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3845                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3846                       " search:\n",
3847                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3848                       "<span title=\"Extended regular expression\">" .
3849                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3850                                      -checked => $search_use_regexp) .
3851                       "</span>" .
3852                       "</div>" .
3853                       $cgi->end_form() . "\n";
3854         }
3855 }
3856
3857 sub git_footer_html {
3858         my $feed_class = 'rss_logo';
3859
3860         print "<div class=\"page_footer\">\n";
3861         if (defined $project) {
3862                 my $descr = git_get_project_description($project);
3863                 if (defined $descr) {
3864                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3865                 }
3866
3867                 my %href_params = get_feed_info();
3868                 if (!%href_params) {
3869                         $feed_class .= ' generic';
3870                 }
3871                 $href_params{'-title'} ||= 'log';
3872
3873                 foreach my $format (qw(RSS Atom)) {
3874                         $href_params{'action'} = lc($format);
3875                         print $cgi->a({-href => href(%href_params),
3876                                       -title => "$href_params{'-title'} $format feed",
3877                                       -class => $feed_class}, $format)."\n";
3878                 }
3879
3880         } else {
3881                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3882                               -class => $feed_class}, "OPML") . " ";
3883                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3884                               -class => $feed_class}, "TXT") . "\n";
3885         }
3886         print "</div>\n"; # class="page_footer"
3887
3888         if (defined $t0 && gitweb_check_feature('timed')) {
3889                 print "<div id=\"generating_info\">\n";
3890                 print 'This page took '.
3891                       '<span id="generating_time" class="time_span">'.
3892                       tv_interval($t0, [ gettimeofday() ]).
3893                       ' seconds </span>'.
3894                       ' and '.
3895                       '<span id="generating_cmd">'.
3896                       $number_of_git_cmds.
3897                       '</span> git commands '.
3898                       " to generate.\n";
3899                 print "</div>\n"; # class="page_footer"
3900         }
3901
3902         if (defined $site_footer && -f $site_footer) {
3903                 insert_file($site_footer);
3904         }
3905
3906         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3907         if (defined $action &&
3908             $action eq 'blame_incremental') {
3909                 print qq!<script type="text/javascript">\n!.
3910                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3911                       qq!           "!. href() .qq!");\n!.
3912                       qq!</script>\n!;
3913         } else {
3914                 my ($jstimezone, $tz_cookie, $datetime_class) =
3915                         gitweb_get_feature('javascript-timezone');
3916
3917                 print qq!<script type="text/javascript">\n!.
3918                       qq!window.onload = function () {\n!;
3919                 if (gitweb_check_feature('javascript-actions')) {
3920                         print qq!       fixLinks();\n!;
3921                 }
3922                 if ($jstimezone && $tz_cookie && $datetime_class) {
3923                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
3924                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
3925                 }
3926                 print qq!};\n!.
3927                       qq!</script>\n!;
3928         }
3929
3930         print "</body>\n" .
3931               "</html>";
3932 }
3933
3934 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3935 # Example: die_error(404, 'Hash not found')
3936 # By convention, use the following status codes (as defined in RFC 2616):
3937 # 400: Invalid or missing CGI parameters, or
3938 #      requested object exists but has wrong type.
3939 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3940 #      this server or project.
3941 # 404: Requested object/revision/project doesn't exist.
3942 # 500: The server isn't configured properly, or
3943 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3944 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3945 # 503: The server is currently unavailable (because it is overloaded,
3946 #      or down for maintenance).  Generally, this is a temporary state.
3947 sub die_error {
3948         my $status = shift || 500;
3949         my $error = esc_html(shift) || "Internal Server Error";
3950         my $extra = shift;
3951         my %opts = @_;
3952
3953         my %http_responses = (
3954                 400 => '400 Bad Request',
3955                 403 => '403 Forbidden',
3956                 404 => '404 Not Found',
3957                 500 => '500 Internal Server Error',
3958                 503 => '503 Service Unavailable',
3959         );
3960         git_header_html($http_responses{$status}, undef, %opts);
3961         print <<EOF;
3962 <div class="page_body">
3963 <br /><br />
3964 $status - $error
3965 <br />
3966 EOF
3967         if (defined $extra) {
3968                 print "<hr />\n" .
3969                       "$extra\n";
3970         }
3971         print "</div>\n";
3972
3973         git_footer_html();
3974         goto DONE_GITWEB
3975                 unless ($opts{'-error_handler'});
3976 }
3977
3978 ## ----------------------------------------------------------------------
3979 ## functions printing or outputting HTML: navigation
3980
3981 sub git_print_page_nav {
3982         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3983         $extra = '' if !defined $extra; # pager or formats
3984
3985         my @navs = qw(summary shortlog log commit commitdiff tree);
3986         if ($suppress) {
3987                 @navs = grep { $_ ne $suppress } @navs;
3988         }
3989
3990         my %arg = map { $_ => {action=>$_} } @navs;
3991         if (defined $head) {
3992                 for (qw(commit commitdiff)) {
3993                         $arg{$_}{'hash'} = $head;
3994                 }
3995                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3996                         for (qw(shortlog log)) {
3997                                 $arg{$_}{'hash'} = $head;
3998                         }
3999                 }
4000         }
4001
4002         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4003         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4004
4005         my @actions = gitweb_get_feature('actions');
4006         my %repl = (
4007                 '%' => '%',
4008                 'n' => $project,         # project name
4009                 'f' => $git_dir,         # project path within filesystem
4010                 'h' => $treehead || '',  # current hash ('h' parameter)
4011                 'b' => $treebase || '',  # hash base ('hb' parameter)
4012         );
4013         while (@actions) {
4014                 my ($label, $link, $pos) = splice(@actions,0,3);
4015                 # insert
4016                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4017                 # munch munch
4018                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4019                 $arg{$label}{'_href'} = $link;
4020         }
4021
4022         print "<div class=\"page_nav\">\n" .
4023                 (join " | ",
4024                  map { $_ eq $current ?
4025                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4026                  } @navs);
4027         print "<br/>\n$extra<br/>\n" .
4028               "</div>\n";
4029 }
4030
4031 # returns a submenu for the nagivation of the refs views (tags, heads,
4032 # remotes) with the current view disabled and the remotes view only
4033 # available if the feature is enabled
4034 sub format_ref_views {
4035         my ($current) = @_;
4036         my @ref_views = qw{tags heads};
4037         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4038         return join " | ", map {
4039                 $_ eq $current ? $_ :
4040                 $cgi->a({-href => href(action=>$_)}, $_)
4041         } @ref_views
4042 }
4043
4044 sub format_paging_nav {
4045         my ($action, $page, $has_next_link) = @_;
4046         my $paging_nav;
4047
4048
4049         if ($page > 0) {
4050                 $paging_nav .=
4051                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4052                         " &sdot; " .
4053                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4054                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4055         } else {
4056                 $paging_nav .= "first &sdot; prev";
4057         }
4058
4059         if ($has_next_link) {
4060                 $paging_nav .= " &sdot; " .
4061                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4062                                  -accesskey => "n", -title => "Alt-n"}, "next");
4063         } else {
4064                 $paging_nav .= " &sdot; next";
4065         }
4066
4067         return $paging_nav;
4068 }
4069
4070 ## ......................................................................
4071 ## functions printing or outputting HTML: div
4072
4073 sub git_print_header_div {
4074         my ($action, $title, $hash, $hash_base) = @_;
4075         my %args = ();
4076
4077         $args{'action'} = $action;
4078         $args{'hash'} = $hash if $hash;
4079         $args{'hash_base'} = $hash_base if $hash_base;
4080
4081         print "<div class=\"header\">\n" .
4082               $cgi->a({-href => href(%args), -class => "title"},
4083               $title ? $title : $action) .
4084               "\n</div>\n";
4085 }
4086
4087 sub format_repo_url {
4088         my ($name, $url) = @_;
4089         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4090 }
4091
4092 # Group output by placing it in a DIV element and adding a header.
4093 # Options for start_div() can be provided by passing a hash reference as the
4094 # first parameter to the function.
4095 # Options to git_print_header_div() can be provided by passing an array
4096 # reference. This must follow the options to start_div if they are present.
4097 # The content can be a scalar, which is output as-is, a scalar reference, which
4098 # is output after html escaping, an IO handle passed either as *handle or
4099 # *handle{IO}, or a function reference. In the latter case all following
4100 # parameters will be taken as argument to the content function call.
4101 sub git_print_section {
4102         my ($div_args, $header_args, $content);
4103         my $arg = shift;
4104         if (ref($arg) eq 'HASH') {
4105                 $div_args = $arg;
4106                 $arg = shift;
4107         }
4108         if (ref($arg) eq 'ARRAY') {
4109                 $header_args = $arg;
4110                 $arg = shift;
4111         }
4112         $content = $arg;
4113
4114         print $cgi->start_div($div_args);
4115         git_print_header_div(@$header_args);
4116
4117         if (ref($content) eq 'CODE') {
4118                 $content->(@_);
4119         } elsif (ref($content) eq 'SCALAR') {
4120                 print esc_html($$content);
4121         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4122                 print <$content>;
4123         } elsif (!ref($content) && defined($content)) {
4124                 print $content;
4125         }
4126
4127         print $cgi->end_div;
4128 }
4129
4130 sub format_timestamp_html {
4131         my $date = shift;
4132         my $strtime = $date->{'rfc2822'};
4133
4134         my (undef, undef, $datetime_class) =
4135                 gitweb_get_feature('javascript-timezone');
4136         if ($datetime_class) {
4137                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4138         }
4139
4140         my $localtime_format = '(%02d:%02d %s)';
4141         if ($date->{'hour_local'} < 6) {
4142                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4143         }
4144         $strtime .= ' ' .
4145                     sprintf($localtime_format,
4146                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4147
4148         return $strtime;
4149 }
4150
4151 # Outputs the author name and date in long form
4152 sub git_print_authorship {
4153         my $co = shift;
4154         my %opts = @_;
4155         my $tag = $opts{-tag} || 'div';
4156         my $author = $co->{'author_name'};
4157
4158         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4159         print "<$tag class=\"author_date\">" .
4160               format_search_author($author, "author", esc_html($author)) .
4161               " [".format_timestamp_html(\%ad)."]".
4162               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4163               "</$tag>\n";
4164 }
4165
4166 # Outputs table rows containing the full author or committer information,
4167 # in the format expected for 'commit' view (& similar).
4168 # Parameters are a commit hash reference, followed by the list of people
4169 # to output information for. If the list is empty it defaults to both
4170 # author and committer.
4171 sub git_print_authorship_rows {
4172         my $co = shift;
4173         # too bad we can't use @people = @_ || ('author', 'committer')
4174         my @people = @_;
4175         @people = ('author', 'committer') unless @people;
4176         foreach my $who (@people) {
4177                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4178                 print "<tr><td>$who</td><td>" .
4179                       format_search_author($co->{"${who}_name"}, $who,
4180                                            esc_html($co->{"${who}_name"})) . " " .
4181                       format_search_author($co->{"${who}_email"}, $who,
4182                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4183                       "</td><td rowspan=\"2\">" .
4184                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4185                       "</td></tr>\n" .
4186                       "<tr>" .
4187                       "<td></td><td>" .
4188                       format_timestamp_html(\%wd) .
4189                       "</td>" .
4190                       "</tr>\n";
4191         }
4192 }
4193
4194 sub git_print_page_path {
4195         my $name = shift;
4196         my $type = shift;
4197         my $hb = shift;
4198
4199
4200         print "<div class=\"page_path\">";
4201         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4202                       -title => 'tree root'}, to_utf8("[$project]"));
4203         print " / ";
4204         if (defined $name) {
4205                 my @dirname = split '/', $name;
4206                 my $basename = pop @dirname;
4207                 my $fullname = '';
4208
4209                 foreach my $dir (@dirname) {
4210                         $fullname .= ($fullname ? '/' : '') . $dir;
4211                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4212                                                      hash_base=>$hb),
4213                                       -title => $fullname}, esc_path($dir));
4214                         print " / ";
4215                 }
4216                 if (defined $type && $type eq 'blob') {
4217                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4218                                                      hash_base=>$hb),
4219                                       -title => $name}, esc_path($basename));
4220                 } elsif (defined $type && $type eq 'tree') {
4221                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4222                                                      hash_base=>$hb),
4223                                       -title => $name}, esc_path($basename));
4224                         print " / ";
4225                 } else {
4226                         print esc_path($basename);
4227                 }
4228         }
4229         print "<br/></div>\n";
4230 }
4231
4232 sub git_print_log {
4233         my $log = shift;
4234         my %opts = @_;
4235
4236         if ($opts{'-remove_title'}) {
4237                 # remove title, i.e. first line of log
4238                 shift @$log;
4239         }
4240         # remove leading empty lines
4241         while (defined $log->[0] && $log->[0] eq "") {
4242                 shift @$log;
4243         }
4244
4245         # print log
4246         my $signoff = 0;
4247         my $empty = 0;
4248         foreach my $line (@$log) {
4249                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4250                         $signoff = 1;
4251                         $empty = 0;
4252                         if (! $opts{'-remove_signoff'}) {
4253                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4254                                 next;
4255                         } else {
4256                                 # remove signoff lines
4257                                 next;
4258                         }
4259                 } else {
4260                         $signoff = 0;
4261                 }
4262
4263                 # print only one empty line
4264                 # do not print empty line after signoff
4265                 if ($line eq "") {
4266                         next if ($empty || $signoff);
4267                         $empty = 1;
4268                 } else {
4269                         $empty = 0;
4270                 }
4271
4272                 print format_log_line_html($line) . "<br/>\n";
4273         }
4274
4275         if ($opts{'-final_empty_line'}) {
4276                 # end with single empty line
4277                 print "<br/>\n" unless $empty;
4278         }
4279 }
4280
4281 # return link target (what link points to)
4282 sub git_get_link_target {
4283         my $hash = shift;
4284         my $link_target;
4285
4286         # read link
4287         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4288                 or return;
4289         {
4290                 local $/ = undef;
4291                 $link_target = <$fd>;
4292         }
4293         close $fd
4294                 or return;
4295
4296         return $link_target;
4297 }
4298
4299 # given link target, and the directory (basedir) the link is in,
4300 # return target of link relative to top directory (top tree);
4301 # return undef if it is not possible (including absolute links).
4302 sub normalize_link_target {
4303         my ($link_target, $basedir) = @_;
4304
4305         # absolute symlinks (beginning with '/') cannot be normalized
4306         return if (substr($link_target, 0, 1) eq '/');
4307
4308         # normalize link target to path from top (root) tree (dir)
4309         my $path;
4310         if ($basedir) {
4311                 $path = $basedir . '/' . $link_target;
4312         } else {
4313                 # we are in top (root) tree (dir)
4314                 $path = $link_target;
4315         }
4316
4317         # remove //, /./, and /../
4318         my @path_parts;
4319         foreach my $part (split('/', $path)) {
4320                 # discard '.' and ''
4321                 next if (!$part || $part eq '.');
4322                 # handle '..'
4323                 if ($part eq '..') {
4324                         if (@path_parts) {
4325                                 pop @path_parts;
4326                         } else {
4327                                 # link leads outside repository (outside top dir)
4328                                 return;
4329                         }
4330                 } else {
4331                         push @path_parts, $part;
4332                 }
4333         }
4334         $path = join('/', @path_parts);
4335
4336         return $path;
4337 }
4338
4339 # print tree entry (row of git_tree), but without encompassing <tr> element
4340 sub git_print_tree_entry {
4341         my ($t, $basedir, $hash_base, $have_blame) = @_;
4342
4343         my %base_key = ();
4344         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4345
4346         # The format of a table row is: mode list link.  Where mode is
4347         # the mode of the entry, list is the name of the entry, an href,
4348         # and link is the action links of the entry.
4349
4350         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4351         if (exists $t->{'size'}) {
4352                 print "<td class=\"size\">$t->{'size'}</td>\n";
4353         }
4354         if ($t->{'type'} eq "blob") {
4355                 print "<td class=\"list\">" .
4356                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4357                                                file_name=>"$basedir$t->{'name'}", %base_key),
4358                                 -class => "list"}, esc_path($t->{'name'}));
4359                 if (S_ISLNK(oct $t->{'mode'})) {
4360                         my $link_target = git_get_link_target($t->{'hash'});
4361                         if ($link_target) {
4362                                 my $norm_target = normalize_link_target($link_target, $basedir);
4363                                 if (defined $norm_target) {
4364                                         print " -> " .
4365                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4366                                                                      file_name=>$norm_target),
4367                                                        -title => $norm_target}, esc_path($link_target));
4368                                 } else {
4369                                         print " -> " . esc_path($link_target);
4370                                 }
4371                         }
4372                 }
4373                 print "</td>\n";
4374                 print "<td class=\"link\">";
4375                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4376                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4377                               "blob");
4378                 if ($have_blame) {
4379                         print " | " .
4380                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4381                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4382                                       "blame");
4383                 }
4384                 if (defined $hash_base) {
4385                         print " | " .
4386                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4387                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4388                                       "history");
4389                 }
4390                 print " | " .
4391                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4392                                                file_name=>"$basedir$t->{'name'}")},
4393                                 "raw");
4394                 print "</td>\n";
4395
4396         } elsif ($t->{'type'} eq "tree") {
4397                 print "<td class=\"list\">";
4398                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4399                                              file_name=>"$basedir$t->{'name'}",
4400                                              %base_key)},
4401                               esc_path($t->{'name'}));
4402                 print "</td>\n";
4403                 print "<td class=\"link\">";
4404                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4405                                              file_name=>"$basedir$t->{'name'}",
4406                                              %base_key)},
4407                               "tree");
4408                 if (defined $hash_base) {
4409                         print " | " .
4410                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4411                                                      file_name=>"$basedir$t->{'name'}")},
4412                                       "history");
4413                 }
4414                 print "</td>\n";
4415         } else {
4416                 # unknown object: we can only present history for it
4417                 # (this includes 'commit' object, i.e. submodule support)
4418                 print "<td class=\"list\">" .
4419                       esc_path($t->{'name'}) .
4420                       "</td>\n";
4421                 print "<td class=\"link\">";
4422                 if (defined $hash_base) {
4423                         print $cgi->a({-href => href(action=>"history",
4424                                                      hash_base=>$hash_base,
4425                                                      file_name=>"$basedir$t->{'name'}")},
4426                                       "history");
4427                 }
4428                 print "</td>\n";
4429         }
4430 }
4431
4432 ## ......................................................................
4433 ## functions printing large fragments of HTML
4434
4435 # get pre-image filenames for merge (combined) diff
4436 sub fill_from_file_info {
4437         my ($diff, @parents) = @_;
4438
4439         $diff->{'from_file'} = [ ];
4440         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4441         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4442                 if ($diff->{'status'}[$i] eq 'R' ||
4443                     $diff->{'status'}[$i] eq 'C') {
4444                         $diff->{'from_file'}[$i] =
4445                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4446                 }
4447         }
4448
4449         return $diff;
4450 }
4451
4452 # is current raw difftree line of file deletion
4453 sub is_deleted {
4454         my $diffinfo = shift;
4455
4456         return $diffinfo->{'to_id'} eq ('0' x 40);
4457 }
4458
4459 # does patch correspond to [previous] difftree raw line
4460 # $diffinfo  - hashref of parsed raw diff format
4461 # $patchinfo - hashref of parsed patch diff format
4462 #              (the same keys as in $diffinfo)
4463 sub is_patch_split {
4464         my ($diffinfo, $patchinfo) = @_;
4465
4466         return defined $diffinfo && defined $patchinfo
4467                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4468 }
4469
4470
4471 sub git_difftree_body {
4472         my ($difftree, $hash, @parents) = @_;
4473         my ($parent) = $parents[0];
4474         my $have_blame = gitweb_check_feature('blame');
4475         print "<div class=\"list_head\">\n";
4476         if ($#{$difftree} > 10) {
4477                 print(($#{$difftree} + 1) . " files changed:\n");
4478         }
4479         print "</div>\n";
4480
4481         print "<table class=\"" .
4482               (@parents > 1 ? "combined " : "") .
4483               "diff_tree\">\n";
4484
4485         # header only for combined diff in 'commitdiff' view
4486         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4487         if ($has_header) {
4488                 # table header
4489                 print "<thead><tr>\n" .
4490                        "<th></th><th></th>\n"; # filename, patchN link
4491                 for (my $i = 0; $i < @parents; $i++) {
4492                         my $par = $parents[$i];
4493                         print "<th>" .
4494                               $cgi->a({-href => href(action=>"commitdiff",
4495                                                      hash=>$hash, hash_parent=>$par),
4496                                        -title => 'commitdiff to parent number ' .
4497                                                   ($i+1) . ': ' . substr($par,0,7)},
4498                                       $i+1) .
4499                               "&nbsp;</th>\n";
4500                 }
4501                 print "</tr></thead>\n<tbody>\n";
4502         }
4503
4504         my $alternate = 1;
4505         my $patchno = 0;
4506         foreach my $line (@{$difftree}) {
4507                 my $diff = parsed_difftree_line($line);
4508
4509                 if ($alternate) {
4510                         print "<tr class=\"dark\">\n";
4511                 } else {
4512                         print "<tr class=\"light\">\n";
4513                 }
4514                 $alternate ^= 1;
4515
4516                 if (exists $diff->{'nparents'}) { # combined diff
4517
4518                         fill_from_file_info($diff, @parents)
4519                                 unless exists $diff->{'from_file'};
4520
4521                         if (!is_deleted($diff)) {
4522                                 # file exists in the result (child) commit
4523                                 print "<td>" .
4524                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4525                                                              file_name=>$diff->{'to_file'},
4526                                                              hash_base=>$hash),
4527                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4528                                       "</td>\n";
4529                         } else {
4530                                 print "<td>" .
4531                                       esc_path($diff->{'to_file'}) .
4532                                       "</td>\n";
4533                         }
4534
4535                         if ($action eq 'commitdiff') {
4536                                 # link to patch
4537                                 $patchno++;
4538                                 print "<td class=\"link\">" .
4539                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4540                                               "patch") .
4541                                       " | " .
4542                                       "</td>\n";
4543                         }
4544
4545                         my $has_history = 0;
4546                         my $not_deleted = 0;
4547                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4548                                 my $hash_parent = $parents[$i];
4549                                 my $from_hash = $diff->{'from_id'}[$i];
4550                                 my $from_path = $diff->{'from_file'}[$i];
4551                                 my $status = $diff->{'status'}[$i];
4552
4553                                 $has_history ||= ($status ne 'A');
4554                                 $not_deleted ||= ($status ne 'D');
4555
4556                                 if ($status eq 'A') {
4557                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4558                                 } elsif ($status eq 'D') {
4559                                         print "<td class=\"link\">" .
4560                                               $cgi->a({-href => href(action=>"blob",
4561                                                                      hash_base=>$hash,
4562                                                                      hash=>$from_hash,
4563                                                                      file_name=>$from_path)},
4564                                                       "blob" . ($i+1)) .
4565                                               " | </td>\n";
4566                                 } else {
4567                                         if ($diff->{'to_id'} eq $from_hash) {
4568                                                 print "<td class=\"link nochange\">";
4569                                         } else {
4570                                                 print "<td class=\"link\">";
4571                                         }
4572                                         print $cgi->a({-href => href(action=>"blobdiff",
4573                                                                      hash=>$diff->{'to_id'},
4574                                                                      hash_parent=>$from_hash,
4575                                                                      hash_base=>$hash,
4576                                                                      hash_parent_base=>$hash_parent,
4577                                                                      file_name=>$diff->{'to_file'},
4578                                                                      file_parent=>$from_path)},
4579                                                       "diff" . ($i+1)) .
4580                                               " | </td>\n";
4581                                 }
4582                         }
4583
4584                         print "<td class=\"link\">";
4585                         if ($not_deleted) {
4586                                 print $cgi->a({-href => href(action=>"blob",
4587                                                              hash=>$diff->{'to_id'},
4588                                                              file_name=>$diff->{'to_file'},
4589                                                              hash_base=>$hash)},
4590                                               "blob");
4591                                 print " | " if ($has_history);
4592                         }
4593                         if ($has_history) {
4594                                 print $cgi->a({-href => href(action=>"history",
4595                                                              file_name=>$diff->{'to_file'},
4596                                                              hash_base=>$hash)},
4597                                               "history");
4598                         }
4599                         print "</td>\n";
4600
4601                         print "</tr>\n";
4602                         next; # instead of 'else' clause, to avoid extra indent
4603                 }
4604                 # else ordinary diff
4605
4606                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4607                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4608                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4609                         $to_mode_oct = oct $diff->{'to_mode'};
4610                         if (S_ISREG($to_mode_oct)) { # only for regular file
4611                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4612                         }
4613                         $to_file_type = file_type($diff->{'to_mode'});
4614                 }
4615                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4616                         $from_mode_oct = oct $diff->{'from_mode'};
4617                         if (S_ISREG($from_mode_oct)) { # only for regular file
4618                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4619                         }
4620                         $from_file_type = file_type($diff->{'from_mode'});
4621                 }
4622
4623                 if ($diff->{'status'} eq "A") { # created
4624                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4625                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4626                         $mode_chng   .= "]</span>";
4627                         print "<td>";
4628                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4629                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4630                                       -class => "list"}, esc_path($diff->{'file'}));
4631                         print "</td>\n";
4632                         print "<td>$mode_chng</td>\n";
4633                         print "<td class=\"link\">";
4634                         if ($action eq 'commitdiff') {
4635                                 # link to patch
4636                                 $patchno++;
4637                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4638                                               "patch") .
4639                                       " | ";
4640                         }
4641                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4642                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4643                                       "blob");
4644                         print "</td>\n";
4645
4646                 } elsif ($diff->{'status'} eq "D") { # deleted
4647                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4648                         print "<td>";
4649                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4650                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4651                                        -class => "list"}, esc_path($diff->{'file'}));
4652                         print "</td>\n";
4653                         print "<td>$mode_chng</td>\n";
4654                         print "<td class=\"link\">";
4655                         if ($action eq 'commitdiff') {
4656                                 # link to patch
4657                                 $patchno++;
4658                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4659                                               "patch") .
4660                                       " | ";
4661                         }
4662                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4663                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4664                                       "blob") . " | ";
4665                         if ($have_blame) {
4666                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4667                                                              file_name=>$diff->{'file'})},
4668                                               "blame") . " | ";
4669                         }
4670                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4671                                                      file_name=>$diff->{'file'})},
4672                                       "history");
4673                         print "</td>\n";
4674
4675                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4676                         my $mode_chnge = "";
4677                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4678                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4679                                 if ($from_file_type ne $to_file_type) {
4680                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4681                                 }
4682                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4683                                         if ($from_mode_str && $to_mode_str) {
4684                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4685                                         } elsif ($to_mode_str) {
4686                                                 $mode_chnge .= " mode: $to_mode_str";
4687                                         }
4688                                 }
4689                                 $mode_chnge .= "]</span>\n";
4690                         }
4691                         print "<td>";
4692                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4693                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4694                                       -class => "list"}, esc_path($diff->{'file'}));
4695                         print "</td>\n";
4696                         print "<td>$mode_chnge</td>\n";
4697                         print "<td class=\"link\">";
4698                         if ($action eq 'commitdiff') {
4699                                 # link to patch
4700                                 $patchno++;
4701                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4702                                               "patch") .
4703                                       " | ";
4704                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4705                                 # "commit" view and modified file (not onlu mode changed)
4706                                 print $cgi->a({-href => href(action=>"blobdiff",
4707                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4708                                                              hash_base=>$hash, hash_parent_base=>$parent,
4709                                                              file_name=>$diff->{'file'})},
4710                                               "diff") .
4711                                       " | ";
4712                         }
4713                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4714                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4715                                        "blob") . " | ";
4716                         if ($have_blame) {
4717                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4718                                                              file_name=>$diff->{'file'})},
4719                                               "blame") . " | ";
4720                         }
4721                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4722                                                      file_name=>$diff->{'file'})},
4723                                       "history");
4724                         print "</td>\n";
4725
4726                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4727                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4728                         my $nstatus = $status_name{$diff->{'status'}};
4729                         my $mode_chng = "";
4730                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4731                                 # mode also for directories, so we cannot use $to_mode_str
4732                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4733                         }
4734                         print "<td>" .
4735                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4736                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4737                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4738                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4739                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4740                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4741                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4742                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4743                               "<td class=\"link\">";
4744                         if ($action eq 'commitdiff') {
4745                                 # link to patch
4746                                 $patchno++;
4747                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4748                                               "patch") .
4749                                       " | ";
4750                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4751                                 # "commit" view and modified file (not only pure rename or copy)
4752                                 print $cgi->a({-href => href(action=>"blobdiff",
4753                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4754                                                              hash_base=>$hash, hash_parent_base=>$parent,
4755                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4756                                               "diff") .
4757                                       " | ";
4758                         }
4759                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4760                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4761                                       "blob") . " | ";
4762                         if ($have_blame) {
4763                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4764                                                              file_name=>$diff->{'to_file'})},
4765                                               "blame") . " | ";
4766                         }
4767                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4768                                                     file_name=>$diff->{'to_file'})},
4769                                       "history");
4770                         print "</td>\n";
4771
4772                 } # we should not encounter Unmerged (U) or Unknown (X) status
4773                 print "</tr>\n";
4774         }
4775         print "</tbody>" if $has_header;
4776         print "</table>\n";
4777 }
4778
4779 sub git_patchset_body {
4780         my ($fd, $difftree, $hash, @hash_parents) = @_;
4781         my ($hash_parent) = $hash_parents[0];
4782
4783         my $is_combined = (@hash_parents > 1);
4784         my $patch_idx = 0;
4785         my $patch_number = 0;
4786         my $patch_line;
4787         my $diffinfo;
4788         my $to_name;
4789         my (%from, %to);
4790
4791         print "<div class=\"patchset\">\n";
4792
4793         # skip to first patch
4794         while ($patch_line = <$fd>) {
4795                 chomp $patch_line;
4796
4797                 last if ($patch_line =~ m/^diff /);
4798         }
4799
4800  PATCH:
4801         while ($patch_line) {
4802
4803                 # parse "git diff" header line
4804                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4805                         # $1 is from_name, which we do not use
4806                         $to_name = unquote($2);
4807                         $to_name =~ s!^b/!!;
4808                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4809                         # $1 is 'cc' or 'combined', which we do not use
4810                         $to_name = unquote($2);
4811                 } else {
4812                         $to_name = undef;
4813                 }
4814
4815                 # check if current patch belong to current raw line
4816                 # and parse raw git-diff line if needed
4817                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4818                         # this is continuation of a split patch
4819                         print "<div class=\"patch cont\">\n";
4820                 } else {
4821                         # advance raw git-diff output if needed
4822                         $patch_idx++ if defined $diffinfo;
4823
4824                         # read and prepare patch information
4825                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4826
4827                         # compact combined diff output can have some patches skipped
4828                         # find which patch (using pathname of result) we are at now;
4829                         if ($is_combined) {
4830                                 while ($to_name ne $diffinfo->{'to_file'}) {
4831                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4832                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4833                                               "</div>\n";  # class="patch"
4834
4835                                         $patch_idx++;
4836                                         $patch_number++;
4837
4838                                         last if $patch_idx > $#$difftree;
4839                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4840                                 }
4841                         }
4842
4843                         # modifies %from, %to hashes
4844                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4845
4846                         # this is first patch for raw difftree line with $patch_idx index
4847                         # we index @$difftree array from 0, but number patches from 1
4848                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4849                 }
4850
4851                 # git diff header
4852                 #assert($patch_line =~ m/^diff /) if DEBUG;
4853                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4854                 $patch_number++;
4855                 # print "git diff" header
4856                 print format_git_diff_header_line($patch_line, $diffinfo,
4857                                                   \%from, \%to);
4858
4859                 # print extended diff header
4860                 print "<div class=\"diff extended_header\">\n";
4861         EXTENDED_HEADER:
4862                 while ($patch_line = <$fd>) {
4863                         chomp $patch_line;
4864
4865                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4866
4867                         print format_extended_diff_header_line($patch_line, $diffinfo,
4868                                                                \%from, \%to);
4869                 }
4870                 print "</div>\n"; # class="diff extended_header"
4871
4872                 # from-file/to-file diff header
4873                 if (! $patch_line) {
4874                         print "</div>\n"; # class="patch"
4875                         last PATCH;
4876                 }
4877                 next PATCH if ($patch_line =~ m/^diff /);
4878                 #assert($patch_line =~ m/^---/) if DEBUG;
4879
4880                 my $last_patch_line = $patch_line;
4881                 $patch_line = <$fd>;
4882                 chomp $patch_line;
4883                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4884
4885                 print format_diff_from_to_header($last_patch_line, $patch_line,
4886                                                  $diffinfo, \%from, \%to,
4887                                                  @hash_parents);
4888
4889                 # the patch itself
4890         LINE:
4891                 while ($patch_line = <$fd>) {
4892                         chomp $patch_line;
4893
4894                         next PATCH if ($patch_line =~ m/^diff /);
4895
4896                         print format_diff_line($patch_line, \%from, \%to);
4897                 }
4898
4899         } continue {
4900                 print "</div>\n"; # class="patch"
4901         }
4902
4903         # for compact combined (--cc) format, with chunk and patch simplification
4904         # the patchset might be empty, but there might be unprocessed raw lines
4905         for (++$patch_idx if $patch_number > 0;
4906              $patch_idx < @$difftree;
4907              ++$patch_idx) {
4908                 # read and prepare patch information
4909                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4910
4911                 # generate anchor for "patch" links in difftree / whatchanged part
4912                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4913                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4914                       "</div>\n";  # class="patch"
4915
4916                 $patch_number++;
4917         }
4918
4919         if ($patch_number == 0) {
4920                 if (@hash_parents > 1) {
4921                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4922                 } else {
4923                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4924                 }
4925         }
4926
4927         print "</div>\n"; # class="patchset"
4928 }
4929
4930 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4931
4932 # fills project list info (age, description, owner, category, forks)
4933 # for each project in the list, removing invalid projects from
4934 # returned list
4935 # NOTE: modifies $projlist, but does not remove entries from it
4936 sub fill_project_list_info {
4937         my $projlist = shift;
4938         my @projects;
4939
4940         my $show_ctags = gitweb_check_feature('ctags');
4941  PROJECT:
4942         foreach my $pr (@$projlist) {
4943                 my (@activity) = git_get_last_activity($pr->{'path'});
4944                 unless (@activity) {
4945                         next PROJECT;
4946                 }
4947                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4948                 if (!defined $pr->{'descr'}) {
4949                         my $descr = git_get_project_description($pr->{'path'}) || "";
4950                         $descr = to_utf8($descr);
4951                         $pr->{'descr_long'} = $descr;
4952                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4953                 }
4954                 if (!defined $pr->{'owner'}) {
4955                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4956                 }
4957                 if ($show_ctags) {
4958                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4959                 }
4960                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4961                         my $cat = git_get_project_category($pr->{'path'}) ||
4962                                                            $project_list_default_category;
4963                         $pr->{'category'} = to_utf8($cat);
4964                 }
4965
4966                 push @projects, $pr;
4967         }
4968
4969         return @projects;
4970 }
4971
4972 sub sort_projects_list {
4973         my ($projlist, $order) = @_;
4974         my @projects;
4975
4976         my %order_info = (
4977                 project => { key => 'path', type => 'str' },
4978                 descr => { key => 'descr_long', type => 'str' },
4979                 owner => { key => 'owner', type => 'str' },
4980                 age => { key => 'age', type => 'num' }
4981         );
4982         my $oi = $order_info{$order};
4983         return @$projlist unless defined $oi;
4984         if ($oi->{'type'} eq 'str') {
4985                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4986         } else {
4987                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4988         }
4989
4990         return @projects;
4991 }
4992
4993 # returns a hash of categories, containing the list of project
4994 # belonging to each category
4995 sub build_projlist_by_category {
4996         my ($projlist, $from, $to) = @_;
4997         my %categories;
4998
4999         $from = 0 unless defined $from;
5000         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5001
5002         for (my $i = $from; $i <= $to; $i++) {
5003                 my $pr = $projlist->[$i];
5004                 push @{$categories{ $pr->{'category'} }}, $pr;
5005         }
5006
5007         return wantarray ? %categories : \%categories;
5008 }
5009
5010 # print 'sort by' <th> element, generating 'sort by $name' replay link
5011 # if that order is not selected
5012 sub print_sort_th {
5013         print format_sort_th(@_);
5014 }
5015
5016 sub format_sort_th {
5017         my ($name, $order, $header) = @_;
5018         my $sort_th = "";
5019         $header ||= ucfirst($name);
5020
5021         if ($order eq $name) {
5022                 $sort_th .= "<th>$header</th>\n";
5023         } else {
5024                 $sort_th .= "<th>" .
5025                             $cgi->a({-href => href(-replay=>1, order=>$name),
5026                                      -class => "header"}, $header) .
5027                             "</th>\n";
5028         }
5029
5030         return $sort_th;
5031 }
5032
5033 sub git_project_list_rows {
5034         my ($projlist, $from, $to, $check_forks) = @_;
5035
5036         $from = 0 unless defined $from;
5037         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5038
5039         my $alternate = 1;
5040         for (my $i = $from; $i <= $to; $i++) {
5041                 my $pr = $projlist->[$i];
5042
5043                 if ($alternate) {
5044                         print "<tr class=\"dark\">\n";
5045                 } else {
5046                         print "<tr class=\"light\">\n";
5047                 }
5048                 $alternate ^= 1;
5049
5050                 if ($check_forks) {
5051                         print "<td>";
5052                         if ($pr->{'forks'}) {
5053                                 my $nforks = scalar @{$pr->{'forks'}};
5054                                 if ($nforks > 0) {
5055                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5056                                                        -title => "$nforks forks"}, "+");
5057                                 } else {
5058                                         print $cgi->span({-title => "$nforks forks"}, "+");
5059                                 }
5060                         }
5061                         print "</td>\n";
5062                 }
5063                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5064                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5065                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5066                                         -class => "list", -title => $pr->{'descr_long'}},
5067                                         esc_html($pr->{'descr'})) . "</td>\n" .
5068                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5069                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5070                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5071                       "<td class=\"link\">" .
5072                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5073                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5074                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5075                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5076                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5077                       "</td>\n" .
5078                       "</tr>\n";
5079         }
5080 }
5081
5082 sub git_project_list_body {
5083         # actually uses global variable $project
5084         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5085         my @projects = @$projlist;
5086
5087         my $check_forks = gitweb_check_feature('forks');
5088         my $show_ctags  = gitweb_check_feature('ctags');
5089         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5090         $check_forks = undef
5091                 if ($tagfilter || $searchtext);
5092
5093         # filtering out forks before filling info allows to do less work
5094         @projects = filter_forks_from_projects_list(\@projects)
5095                 if ($check_forks);
5096         @projects = fill_project_list_info(\@projects);
5097         # searching projects require filling to be run before it
5098         @projects = search_projects_list(\@projects,
5099                                          'searchtext' => $searchtext,
5100                                          'tagfilter'  => $tagfilter)
5101                 if ($tagfilter || $searchtext);
5102
5103         $order ||= $default_projects_order;
5104         $from = 0 unless defined $from;
5105         $to = $#projects if (!defined $to || $#projects < $to);
5106
5107         # short circuit
5108         if ($from > $to) {
5109                 print "<center>\n".
5110                       "<b>No such projects found</b><br />\n".
5111                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5112                       "</center>\n<br />\n";
5113                 return;
5114         }
5115
5116         @projects = sort_projects_list(\@projects, $order);
5117
5118         if ($show_ctags) {
5119                 my $ctags = git_gather_all_ctags(\@projects);
5120                 my $cloud = git_populate_project_tagcloud($ctags);
5121                 print git_show_project_tagcloud($cloud, 64);
5122         }
5123
5124         print "<table class=\"project_list\">\n";
5125         unless ($no_header) {
5126                 print "<tr>\n";
5127                 if ($check_forks) {
5128                         print "<th></th>\n";
5129                 }
5130                 print_sort_th('project', $order, 'Project');
5131                 print_sort_th('descr', $order, 'Description');
5132                 print_sort_th('owner', $order, 'Owner');
5133                 print_sort_th('age', $order, 'Last Change');
5134                 print "<th></th>\n" . # for links
5135                       "</tr>\n";
5136         }
5137
5138         if ($projects_list_group_categories) {
5139                 # only display categories with projects in the $from-$to window
5140                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5141                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5142                 foreach my $cat (sort keys %categories) {
5143                         unless ($cat eq "") {
5144                                 print "<tr>\n";
5145                                 if ($check_forks) {
5146                                         print "<td></td>\n";
5147                                 }
5148                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5149                                 print "</tr>\n";
5150                         }
5151
5152                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5153                 }
5154         } else {
5155                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5156         }
5157
5158         if (defined $extra) {
5159                 print "<tr>\n";
5160                 if ($check_forks) {
5161                         print "<td></td>\n";
5162                 }
5163                 print "<td colspan=\"5\">$extra</td>\n" .
5164                       "</tr>\n";
5165         }
5166         print "</table>\n";
5167 }
5168
5169 sub git_log_body {
5170         # uses global variable $project
5171         my ($commitlist, $from, $to, $refs, $extra) = @_;
5172
5173         $from = 0 unless defined $from;
5174         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5175
5176         for (my $i = 0; $i <= $to; $i++) {
5177                 my %co = %{$commitlist->[$i]};
5178                 next if !%co;
5179                 my $commit = $co{'id'};
5180                 my $ref = format_ref_marker($refs, $commit);
5181                 git_print_header_div('commit',
5182                                "<span class=\"age\">$co{'age_string'}</span>" .
5183                                esc_html($co{'title'}) . $ref,
5184                                $commit);
5185                 print "<div class=\"title_text\">\n" .
5186                       "<div class=\"log_link\">\n" .
5187                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5188                       " | " .
5189                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5190                       " | " .
5191                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5192                       "<br/>\n" .
5193                       "</div>\n";
5194                       git_print_authorship(\%co, -tag => 'span');
5195                       print "<br/>\n</div>\n";
5196
5197                 print "<div class=\"log_body\">\n";
5198                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5199                 print "</div>\n";
5200         }
5201         if ($extra) {
5202                 print "<div class=\"page_nav\">\n";
5203                 print "$extra\n";
5204                 print "</div>\n";
5205         }
5206 }
5207
5208 sub git_shortlog_body {
5209         # uses global variable $project
5210         my ($commitlist, $from, $to, $refs, $extra) = @_;
5211
5212         $from = 0 unless defined $from;
5213         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5214
5215         print "<table class=\"shortlog\">\n";
5216         my $alternate = 1;
5217         for (my $i = $from; $i <= $to; $i++) {
5218                 my %co = %{$commitlist->[$i]};
5219                 my $commit = $co{'id'};
5220                 my $ref = format_ref_marker($refs, $commit);
5221                 if ($alternate) {
5222                         print "<tr class=\"dark\">\n";
5223                 } else {
5224                         print "<tr class=\"light\">\n";
5225                 }
5226                 $alternate ^= 1;
5227                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5228                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5229                       format_author_html('td', \%co, 10) . "<td>";
5230                 print format_subject_html($co{'title'}, $co{'title_short'},
5231                                           href(action=>"commit", hash=>$commit), $ref);
5232                 print "</td>\n" .
5233                       "<td class=\"link\">" .
5234                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5235                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5236                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5237                 my $snapshot_links = format_snapshot_links($commit);
5238                 if (defined $snapshot_links) {
5239                         print " | " . $snapshot_links;
5240                 }
5241                 print "</td>\n" .
5242                       "</tr>\n";
5243         }
5244         if (defined $extra) {
5245                 print "<tr>\n" .
5246                       "<td colspan=\"4\">$extra</td>\n" .
5247                       "</tr>\n";
5248         }
5249         print "</table>\n";
5250 }
5251
5252 sub git_history_body {
5253         # Warning: assumes constant type (blob or tree) during history
5254         my ($commitlist, $from, $to, $refs, $extra,
5255             $file_name, $file_hash, $ftype) = @_;
5256
5257         $from = 0 unless defined $from;
5258         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5259
5260         print "<table class=\"history\">\n";
5261         my $alternate = 1;
5262         for (my $i = $from; $i <= $to; $i++) {
5263                 my %co = %{$commitlist->[$i]};
5264                 if (!%co) {
5265                         next;
5266                 }
5267                 my $commit = $co{'id'};
5268
5269                 my $ref = format_ref_marker($refs, $commit);
5270
5271                 if ($alternate) {
5272                         print "<tr class=\"dark\">\n";
5273                 } else {
5274                         print "<tr class=\"light\">\n";
5275                 }
5276                 $alternate ^= 1;
5277                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5278         # shortlog:   format_author_html('td', \%co, 10)
5279                       format_author_html('td', \%co, 15, 3) . "<td>";
5280                 # originally git_history used chop_str($co{'title'}, 50)
5281                 print format_subject_html($co{'title'}, $co{'title_short'},
5282                                           href(action=>"commit", hash=>$commit), $ref);
5283                 print "</td>\n" .
5284                       "<td class=\"link\">" .
5285                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5286                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5287
5288                 if ($ftype eq 'blob') {
5289                         my $blob_current = $file_hash;
5290                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5291                         if (defined $blob_current && defined $blob_parent &&
5292                                         $blob_current ne $blob_parent) {
5293                                 print " | " .
5294                                         $cgi->a({-href => href(action=>"blobdiff",
5295                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5296                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5297                                                                file_name=>$file_name)},
5298                                                 "diff to current");
5299                         }
5300                 }
5301                 print "</td>\n" .
5302                       "</tr>\n";
5303         }
5304         if (defined $extra) {
5305                 print "<tr>\n" .
5306                       "<td colspan=\"4\">$extra</td>\n" .
5307                       "</tr>\n";
5308         }
5309         print "</table>\n";
5310 }
5311
5312 sub git_tags_body {
5313         # uses global variable $project
5314         my ($taglist, $from, $to, $extra) = @_;
5315         $from = 0 unless defined $from;
5316         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5317
5318         print "<table class=\"tags\">\n";
5319         my $alternate = 1;
5320         for (my $i = $from; $i <= $to; $i++) {
5321                 my $entry = $taglist->[$i];
5322                 my %tag = %$entry;
5323                 my $comment = $tag{'subject'};
5324                 my $comment_short;
5325                 if (defined $comment) {
5326                         $comment_short = chop_str($comment, 30, 5);
5327                 }
5328                 if ($alternate) {
5329                         print "<tr class=\"dark\">\n";
5330                 } else {
5331                         print "<tr class=\"light\">\n";
5332                 }
5333                 $alternate ^= 1;
5334                 if (defined $tag{'age'}) {
5335                         print "<td><i>$tag{'age'}</i></td>\n";
5336                 } else {
5337                         print "<td></td>\n";
5338                 }
5339                 print "<td>" .
5340                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5341                                -class => "list name"}, esc_html($tag{'name'})) .
5342                       "</td>\n" .
5343                       "<td>";
5344                 if (defined $comment) {
5345                         print format_subject_html($comment, $comment_short,
5346                                                   href(action=>"tag", hash=>$tag{'id'}));
5347                 }
5348                 print "</td>\n" .
5349                       "<td class=\"selflink\">";
5350                 if ($tag{'type'} eq "tag") {
5351                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5352                 } else {
5353                         print "&nbsp;";
5354                 }
5355                 print "</td>\n" .
5356                       "<td class=\"link\">" . " | " .
5357                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5358                 if ($tag{'reftype'} eq "commit") {
5359                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5360                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5361                 } elsif ($tag{'reftype'} eq "blob") {
5362                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5363                 }
5364                 print "</td>\n" .
5365                       "</tr>";
5366         }
5367         if (defined $extra) {
5368                 print "<tr>\n" .
5369                       "<td colspan=\"5\">$extra</td>\n" .
5370                       "</tr>\n";
5371         }
5372         print "</table>\n";
5373 }
5374
5375 sub git_heads_body {
5376         # uses global variable $project
5377         my ($headlist, $head, $from, $to, $extra) = @_;
5378         $from = 0 unless defined $from;
5379         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5380
5381         print "<table class=\"heads\">\n";
5382         my $alternate = 1;
5383         for (my $i = $from; $i <= $to; $i++) {
5384                 my $entry = $headlist->[$i];
5385                 my %ref = %$entry;
5386                 my $curr = $ref{'id'} eq $head;
5387                 if ($alternate) {
5388                         print "<tr class=\"dark\">\n";
5389                 } else {
5390                         print "<tr class=\"light\">\n";
5391                 }
5392                 $alternate ^= 1;
5393                 print "<td><i>$ref{'age'}</i></td>\n" .
5394                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5395                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5396                                -class => "list name"},esc_html($ref{'name'})) .
5397                       "</td>\n" .
5398                       "<td class=\"link\">" .
5399                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5400                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5401                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5402                       "</td>\n" .
5403                       "</tr>";
5404         }
5405         if (defined $extra) {
5406                 print "<tr>\n" .
5407                       "<td colspan=\"3\">$extra</td>\n" .
5408                       "</tr>\n";
5409         }
5410         print "</table>\n";
5411 }
5412
5413 # Display a single remote block
5414 sub git_remote_block {
5415         my ($remote, $rdata, $limit, $head) = @_;
5416
5417         my $heads = $rdata->{'heads'};
5418         my $fetch = $rdata->{'fetch'};
5419         my $push = $rdata->{'push'};
5420
5421         my $urls_table = "<table class=\"projects_list\">\n" ;
5422
5423         if (defined $fetch) {
5424                 if ($fetch eq $push) {
5425                         $urls_table .= format_repo_url("URL", $fetch);
5426                 } else {
5427                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5428                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5429                 }
5430         } elsif (defined $push) {
5431                 $urls_table .= format_repo_url("Push URL", $push);
5432         } else {
5433                 $urls_table .= format_repo_url("", "No remote URL");
5434         }
5435
5436         $urls_table .= "</table>\n";
5437
5438         my $dots;
5439         if (defined $limit && $limit < @$heads) {
5440                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5441         }
5442
5443         print $urls_table;
5444         git_heads_body($heads, $head, 0, $limit, $dots);
5445 }
5446
5447 # Display a list of remote names with the respective fetch and push URLs
5448 sub git_remotes_list {
5449         my ($remotedata, $limit) = @_;
5450         print "<table class=\"heads\">\n";
5451         my $alternate = 1;
5452         my @remotes = sort keys %$remotedata;
5453
5454         my $limited = $limit && $limit < @remotes;
5455
5456         $#remotes = $limit - 1 if $limited;
5457
5458         while (my $remote = shift @remotes) {
5459                 my $rdata = $remotedata->{$remote};
5460                 my $fetch = $rdata->{'fetch'};
5461                 my $push = $rdata->{'push'};
5462                 if ($alternate) {
5463                         print "<tr class=\"dark\">\n";
5464                 } else {
5465                         print "<tr class=\"light\">\n";
5466                 }
5467                 $alternate ^= 1;
5468                 print "<td>" .
5469                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5470                                -class=> "list name"},esc_html($remote)) .
5471                       "</td>";
5472                 print "<td class=\"link\">" .
5473                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5474                       " | " .
5475                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5476                       "</td>";
5477
5478                 print "</tr>\n";
5479         }
5480
5481         if ($limited) {
5482                 print "<tr>\n" .
5483                       "<td colspan=\"3\">" .
5484                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5485                       "</td>\n" . "</tr>\n";
5486         }
5487
5488         print "</table>";
5489 }
5490
5491 # Display remote heads grouped by remote, unless there are too many
5492 # remotes, in which case we only display the remote names
5493 sub git_remotes_body {
5494         my ($remotedata, $limit, $head) = @_;
5495         if ($limit and $limit < keys %$remotedata) {
5496                 git_remotes_list($remotedata, $limit);
5497         } else {
5498                 fill_remote_heads($remotedata);
5499                 while (my ($remote, $rdata) = each %$remotedata) {
5500                         git_print_section({-class=>"remote", -id=>$remote},
5501                                 ["remotes", $remote, $remote], sub {
5502                                         git_remote_block($remote, $rdata, $limit, $head);
5503                                 });
5504                 }
5505         }
5506 }
5507
5508 sub git_search_grep_body {
5509         my ($commitlist, $from, $to, $extra) = @_;
5510         $from = 0 unless defined $from;
5511         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5512
5513         print "<table class=\"commit_search\">\n";
5514         my $alternate = 1;
5515         for (my $i = $from; $i <= $to; $i++) {
5516                 my %co = %{$commitlist->[$i]};
5517                 if (!%co) {
5518                         next;
5519                 }
5520                 my $commit = $co{'id'};
5521                 if ($alternate) {
5522                         print "<tr class=\"dark\">\n";
5523                 } else {
5524                         print "<tr class=\"light\">\n";
5525                 }
5526                 $alternate ^= 1;
5527                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5528                       format_author_html('td', \%co, 15, 5) .
5529                       "<td>" .
5530                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5531                                -class => "list subject"},
5532                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5533                 my $comment = $co{'comment'};
5534                 foreach my $line (@$comment) {
5535                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5536                                 my ($lead, $match, $trail) = ($1, $2, $3);
5537                                 $match = chop_str($match, 70, 5, 'center');
5538                                 my $contextlen = int((80 - length($match))/2);
5539                                 $contextlen = 30 if ($contextlen > 30);
5540                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5541                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5542
5543                                 $lead  = esc_html($lead);
5544                                 $match = esc_html($match);
5545                                 $trail = esc_html($trail);
5546
5547                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5548                         }
5549                 }
5550                 print "</td>\n" .
5551                       "<td class=\"link\">" .
5552                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5553                       " | " .
5554                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5555                       " | " .
5556                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5557                 print "</td>\n" .
5558                       "</tr>\n";
5559         }
5560         if (defined $extra) {
5561                 print "<tr>\n" .
5562                       "<td colspan=\"3\">$extra</td>\n" .
5563                       "</tr>\n";
5564         }
5565         print "</table>\n";
5566 }
5567
5568 ## ======================================================================
5569 ## ======================================================================
5570 ## actions
5571
5572 sub git_project_list {
5573         my $order = $input_params{'order'};
5574         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5575                 die_error(400, "Unknown order parameter");
5576         }
5577
5578         my @list = git_get_projects_list();
5579         if (!@list) {
5580                 die_error(404, "No projects found");
5581         }
5582
5583         git_header_html();
5584         if (defined $home_text && -f $home_text) {
5585                 print "<div class=\"index_include\">\n";
5586                 insert_file($home_text);
5587                 print "</div>\n";
5588         }
5589         print $cgi->startform(-method => "get") .
5590               "<p class=\"projsearch\">Search:\n" .
5591               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5592               "</p>" .
5593               $cgi->end_form() . "\n";
5594         git_project_list_body(\@list, $order);
5595         git_footer_html();
5596 }
5597
5598 sub git_forks {
5599         my $order = $input_params{'order'};
5600         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5601                 die_error(400, "Unknown order parameter");
5602         }
5603
5604         my @list = git_get_projects_list($project);
5605         if (!@list) {
5606                 die_error(404, "No forks found");
5607         }
5608
5609         git_header_html();
5610         git_print_page_nav('','');
5611         git_print_header_div('summary', "$project forks");
5612         git_project_list_body(\@list, $order);
5613         git_footer_html();
5614 }
5615
5616 sub git_project_index {
5617         my @projects = git_get_projects_list();
5618         if (!@projects) {
5619                 die_error(404, "No projects found");
5620         }
5621
5622         print $cgi->header(
5623                 -type => 'text/plain',
5624                 -charset => 'utf-8',
5625                 -content_disposition => 'inline; filename="index.aux"');
5626
5627         foreach my $pr (@projects) {
5628                 if (!exists $pr->{'owner'}) {
5629                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5630                 }
5631
5632                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5633                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5634                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5635                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5636                 $path  =~ s/ /\+/g;
5637                 $owner =~ s/ /\+/g;
5638
5639                 print "$path $owner\n";
5640         }
5641 }
5642
5643 sub git_summary {
5644         my $descr = git_get_project_description($project) || "none";
5645         my %co = parse_commit("HEAD");
5646         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5647         my $head = $co{'id'};
5648         my $remote_heads = gitweb_check_feature('remote_heads');
5649
5650         my $owner = git_get_project_owner($project);
5651
5652         my $refs = git_get_references();
5653         # These get_*_list functions return one more to allow us to see if
5654         # there are more ...
5655         my @taglist  = git_get_tags_list(16);
5656         my @headlist = git_get_heads_list(16);
5657         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5658         my @forklist;
5659         my $check_forks = gitweb_check_feature('forks');
5660
5661         if ($check_forks) {
5662                 # find forks of a project
5663                 @forklist = git_get_projects_list($project);
5664                 # filter out forks of forks
5665                 @forklist = filter_forks_from_projects_list(\@forklist)
5666                         if (@forklist);
5667         }
5668
5669         git_header_html();
5670         git_print_page_nav('summary','', $head);
5671
5672         print "<div class=\"title\">&nbsp;</div>\n";
5673         print "<table class=\"projects_list\">\n" .
5674               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5675               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5676         if (defined $cd{'rfc2822'}) {
5677                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5678                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5679         }
5680
5681         # use per project git URL list in $projectroot/$project/cloneurl
5682         # or make project git URL from git base URL and project name
5683         my $url_tag = "URL";
5684         my @url_list = git_get_project_url_list($project);
5685         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5686         foreach my $git_url (@url_list) {
5687                 next unless $git_url;
5688                 print format_repo_url($url_tag, $git_url);
5689                 $url_tag = "";
5690         }
5691
5692         # Tag cloud
5693         my $show_ctags = gitweb_check_feature('ctags');
5694         if ($show_ctags) {
5695                 my $ctags = git_get_project_ctags($project);
5696                 if (%$ctags) {
5697                         # without ability to add tags, don't show if there are none
5698                         my $cloud = git_populate_project_tagcloud($ctags);
5699                         print "<tr id=\"metadata_ctags\">" .
5700                               "<td>content tags</td>" .
5701                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5702                               "</tr>\n";
5703                 }
5704         }
5705
5706         print "</table>\n";
5707
5708         # If XSS prevention is on, we don't include README.html.
5709         # TODO: Allow a readme in some safe format.
5710         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5711                 print "<div class=\"title\">readme</div>\n" .
5712                       "<div class=\"readme\">\n";
5713                 insert_file("$projectroot/$project/README.html");
5714                 print "\n</div>\n"; # class="readme"
5715         }
5716
5717         # we need to request one more than 16 (0..15) to check if
5718         # those 16 are all
5719         my @commitlist = $head ? parse_commits($head, 17) : ();
5720         if (@commitlist) {
5721                 git_print_header_div('shortlog');
5722                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5723                                   $#commitlist <=  15 ? undef :
5724                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5725         }
5726
5727         if (@taglist) {
5728                 git_print_header_div('tags');
5729                 git_tags_body(\@taglist, 0, 15,
5730                               $#taglist <=  15 ? undef :
5731                               $cgi->a({-href => href(action=>"tags")}, "..."));
5732         }
5733
5734         if (@headlist) {
5735                 git_print_header_div('heads');
5736                 git_heads_body(\@headlist, $head, 0, 15,
5737                                $#headlist <= 15 ? undef :
5738                                $cgi->a({-href => href(action=>"heads")}, "..."));
5739         }
5740
5741         if (%remotedata) {
5742                 git_print_header_div('remotes');
5743                 git_remotes_body(\%remotedata, 15, $head);
5744         }
5745
5746         if (@forklist) {
5747                 git_print_header_div('forks');
5748                 git_project_list_body(\@forklist, 'age', 0, 15,
5749                                       $#forklist <= 15 ? undef :
5750                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5751                                       'no_header');
5752         }
5753
5754         git_footer_html();
5755 }
5756
5757 sub git_tag {
5758         my %tag = parse_tag($hash);
5759
5760         if (! %tag) {
5761                 die_error(404, "Unknown tag object");
5762         }
5763
5764         my $head = git_get_head_hash($project);
5765         git_header_html();
5766         git_print_page_nav('','', $head,undef,$head);
5767         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5768         print "<div class=\"title_text\">\n" .
5769               "<table class=\"object_header\">\n" .
5770               "<tr>\n" .
5771               "<td>object</td>\n" .
5772               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5773                                $tag{'object'}) . "</td>\n" .
5774               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5775                                               $tag{'type'}) . "</td>\n" .
5776               "</tr>\n";
5777         if (defined($tag{'author'})) {
5778                 git_print_authorship_rows(\%tag, 'author');
5779         }
5780         print "</table>\n\n" .
5781               "</div>\n";
5782         print "<div class=\"page_body\">";
5783         my $comment = $tag{'comment'};
5784         foreach my $line (@$comment) {
5785                 chomp $line;
5786                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5787         }
5788         print "</div>\n";
5789         git_footer_html();
5790 }
5791
5792 sub git_blame_common {
5793         my $format = shift || 'porcelain';
5794         if ($format eq 'porcelain' && $cgi->param('js')) {
5795                 $format = 'incremental';
5796                 $action = 'blame_incremental'; # for page title etc
5797         }
5798
5799         # permissions
5800         gitweb_check_feature('blame')
5801                 or die_error(403, "Blame view not allowed");
5802
5803         # error checking
5804         die_error(400, "No file name given") unless $file_name;
5805         $hash_base ||= git_get_head_hash($project);
5806         die_error(404, "Couldn't find base commit") unless $hash_base;
5807         my %co = parse_commit($hash_base)
5808                 or die_error(404, "Commit not found");
5809         my $ftype = "blob";
5810         if (!defined $hash) {
5811                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5812                         or die_error(404, "Error looking up file");
5813         } else {
5814                 $ftype = git_get_type($hash);
5815                 if ($ftype !~ "blob") {
5816                         die_error(400, "Object is not a blob");
5817                 }
5818         }
5819
5820         my $fd;
5821         if ($format eq 'incremental') {
5822                 # get file contents (as base)
5823                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5824                         or die_error(500, "Open git-cat-file failed");
5825         } elsif ($format eq 'data') {
5826                 # run git-blame --incremental
5827                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5828                         $hash_base, "--", $file_name
5829                         or die_error(500, "Open git-blame --incremental failed");
5830         } else {
5831                 # run git-blame --porcelain
5832                 open $fd, "-|", git_cmd(), "blame", '-p',
5833                         $hash_base, '--', $file_name
5834                         or die_error(500, "Open git-blame --porcelain failed");
5835         }
5836
5837         # incremental blame data returns early
5838         if ($format eq 'data') {
5839                 print $cgi->header(
5840                         -type=>"text/plain", -charset => "utf-8",
5841                         -status=> "200 OK");
5842                 local $| = 1; # output autoflush
5843                 print while <$fd>;
5844                 close $fd
5845                         or print "ERROR $!\n";
5846
5847                 print 'END';
5848                 if (defined $t0 && gitweb_check_feature('timed')) {
5849                         print ' '.
5850                               tv_interval($t0, [ gettimeofday() ]).
5851                               ' '.$number_of_git_cmds;
5852                 }
5853                 print "\n";
5854
5855                 return;
5856         }
5857
5858         # page header
5859         git_header_html();
5860         my $formats_nav =
5861                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5862                         "blob") .
5863                 " | ";
5864         if ($format eq 'incremental') {
5865                 $formats_nav .=
5866                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5867                                 "blame") . " (non-incremental)";
5868         } else {
5869                 $formats_nav .=
5870                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5871                                 "blame") . " (incremental)";
5872         }
5873         $formats_nav .=
5874                 " | " .
5875                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5876                         "history") .
5877                 " | " .
5878                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5879                         "HEAD");
5880         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5881         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5882         git_print_page_path($file_name, $ftype, $hash_base);
5883
5884         # page body
5885         if ($format eq 'incremental') {
5886                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5887                       "This page requires JavaScript to run.\n Use ".
5888                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5889                               'this page').
5890                       " instead.\n".
5891                       "</b></center></div>\n</noscript>\n";
5892
5893                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5894         }
5895
5896         print qq!<div class="page_body">\n!;
5897         print qq!<div id="progress_info">... / ...</div>\n!
5898                 if ($format eq 'incremental');
5899         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5900               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5901               qq!<thead>\n!.
5902               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5903               qq!</thead>\n!.
5904               qq!<tbody>\n!;
5905
5906         my @rev_color = qw(light dark);
5907         my $num_colors = scalar(@rev_color);
5908         my $current_color = 0;
5909
5910         if ($format eq 'incremental') {
5911                 my $color_class = $rev_color[$current_color];
5912
5913                 #contents of a file
5914                 my $linenr = 0;
5915         LINE:
5916                 while (my $line = <$fd>) {
5917                         chomp $line;
5918                         $linenr++;
5919
5920                         print qq!<tr id="l$linenr" class="$color_class">!.
5921                               qq!<td class="sha1"><a href=""> </a></td>!.
5922                               qq!<td class="linenr">!.
5923                               qq!<a class="linenr" href="">$linenr</a></td>!;
5924                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5925                         print qq!</tr>\n!;
5926                 }
5927
5928         } else { # porcelain, i.e. ordinary blame
5929                 my %metainfo = (); # saves information about commits
5930
5931                 # blame data
5932         LINE:
5933                 while (my $line = <$fd>) {
5934                         chomp $line;
5935                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5936                         # no <lines in group> for subsequent lines in group of lines
5937                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5938                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5939                         if (!exists $metainfo{$full_rev}) {
5940                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5941                         }
5942                         my $meta = $metainfo{$full_rev};
5943                         my $data;
5944                         while ($data = <$fd>) {
5945                                 chomp $data;
5946                                 last if ($data =~ s/^\t//); # contents of line
5947                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5948                                         $meta->{$1} = $2 unless exists $meta->{$1};
5949                                 }
5950                                 if ($data =~ /^previous /) {
5951                                         $meta->{'nprevious'}++;
5952                                 }
5953                         }
5954                         my $short_rev = substr($full_rev, 0, 8);
5955                         my $author = $meta->{'author'};
5956                         my %date =
5957                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5958                         my $date = $date{'iso-tz'};
5959                         if ($group_size) {
5960                                 $current_color = ($current_color + 1) % $num_colors;
5961                         }
5962                         my $tr_class = $rev_color[$current_color];
5963                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5964                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5965                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5966                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5967                         if ($group_size) {
5968                                 print "<td class=\"sha1\"";
5969                                 print " title=\"". esc_html($author) . ", $date\"";
5970                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5971                                 print ">";
5972                                 print $cgi->a({-href => href(action=>"commit",
5973                                                              hash=>$full_rev,
5974                                                              file_name=>$file_name)},
5975                                               esc_html($short_rev));
5976                                 if ($group_size >= 2) {
5977                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5978                                         if (@author_initials) {
5979                                                 print "<br />" .
5980                                                       esc_html(join('', @author_initials));
5981                                                 #           or join('.', ...)
5982                                         }
5983                                 }
5984                                 print "</td>\n";
5985                         }
5986                         # 'previous' <sha1 of parent commit> <filename at commit>
5987                         if (exists $meta->{'previous'} &&
5988                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5989                                 $meta->{'parent'} = $1;
5990                                 $meta->{'file_parent'} = unquote($2);
5991                         }
5992                         my $linenr_commit =
5993                                 exists($meta->{'parent'}) ?
5994                                 $meta->{'parent'} : $full_rev;
5995                         my $linenr_filename =
5996                                 exists($meta->{'file_parent'}) ?
5997                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5998                         my $blamed = href(action => 'blame',
5999                                           file_name => $linenr_filename,
6000                                           hash_base => $linenr_commit);
6001                         print "<td class=\"linenr\">";
6002                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6003                                         -class => "linenr" },
6004                                       esc_html($lineno));
6005                         print "</td>";
6006                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6007                         print "</tr>\n";
6008                 } # end while
6009
6010         }
6011
6012         # footer
6013         print "</tbody>\n".
6014               "</table>\n"; # class="blame"
6015         print "</div>\n";   # class="blame_body"
6016         close $fd
6017                 or print "Reading blob failed\n";
6018
6019         git_footer_html();
6020 }
6021
6022 sub git_blame {
6023         git_blame_common();
6024 }
6025
6026 sub git_blame_incremental {
6027         git_blame_common('incremental');
6028 }
6029
6030 sub git_blame_data {
6031         git_blame_common('data');
6032 }
6033
6034 sub git_tags {
6035         my $head = git_get_head_hash($project);
6036         git_header_html();
6037         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6038         git_print_header_div('summary', $project);
6039
6040         my @tagslist = git_get_tags_list();
6041         if (@tagslist) {
6042                 git_tags_body(\@tagslist);
6043         }
6044         git_footer_html();
6045 }
6046
6047 sub git_heads {
6048         my $head = git_get_head_hash($project);
6049         git_header_html();
6050         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6051         git_print_header_div('summary', $project);
6052
6053         my @headslist = git_get_heads_list();
6054         if (@headslist) {
6055                 git_heads_body(\@headslist, $head);
6056         }
6057         git_footer_html();
6058 }
6059
6060 # used both for single remote view and for list of all the remotes
6061 sub git_remotes {
6062         gitweb_check_feature('remote_heads')
6063                 or die_error(403, "Remote heads view is disabled");
6064
6065         my $head = git_get_head_hash($project);
6066         my $remote = $input_params{'hash'};
6067
6068         my $remotedata = git_get_remotes_list($remote);
6069         die_error(500, "Unable to get remote information") unless defined $remotedata;
6070
6071         unless (%$remotedata) {
6072                 die_error(404, defined $remote ?
6073                         "Remote $remote not found" :
6074                         "No remotes found");
6075         }
6076
6077         git_header_html(undef, undef, -action_extra => $remote);
6078         git_print_page_nav('', '',  $head, undef, $head,
6079                 format_ref_views($remote ? '' : 'remotes'));
6080
6081         fill_remote_heads($remotedata);
6082         if (defined $remote) {
6083                 git_print_header_div('remotes', "$remote remote for $project");
6084                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6085         } else {
6086                 git_print_header_div('summary', "$project remotes");
6087                 git_remotes_body($remotedata, undef, $head);
6088         }
6089
6090         git_footer_html();
6091 }
6092
6093 sub git_blob_plain {
6094         my $type = shift;
6095         my $expires;
6096
6097         if (!defined $hash) {
6098                 if (defined $file_name) {
6099                         my $base = $hash_base || git_get_head_hash($project);
6100                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6101                                 or die_error(404, "Cannot find file");
6102                 } else {
6103                         die_error(400, "No file name defined");
6104                 }
6105         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6106                 # blobs defined by non-textual hash id's can be cached
6107                 $expires = "+1d";
6108         }
6109
6110         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6111                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6112
6113         # content-type (can include charset)
6114         $type = blob_contenttype($fd, $file_name, $type);
6115
6116         # "save as" filename, even when no $file_name is given
6117         my $save_as = "$hash";
6118         if (defined $file_name) {
6119                 $save_as = $file_name;
6120         } elsif ($type =~ m/^text\//) {
6121                 $save_as .= '.txt';
6122         }
6123
6124         # With XSS prevention on, blobs of all types except a few known safe
6125         # ones are served with "Content-Disposition: attachment" to make sure
6126         # they don't run in our security domain.  For certain image types,
6127         # blob view writes an <img> tag referring to blob_plain view, and we
6128         # want to be sure not to break that by serving the image as an
6129         # attachment (though Firefox 3 doesn't seem to care).
6130         my $sandbox = $prevent_xss &&
6131                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6132
6133         print $cgi->header(
6134                 -type => $type,
6135                 -expires => $expires,
6136                 -content_disposition =>
6137                         ($sandbox ? 'attachment' : 'inline')
6138                         . '; filename="' . $save_as . '"');
6139         local $/ = undef;
6140         binmode STDOUT, ':raw';
6141         print <$fd>;
6142         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6143         close $fd;
6144 }
6145
6146 sub git_blob {
6147         my $expires;
6148
6149         if (!defined $hash) {
6150                 if (defined $file_name) {
6151                         my $base = $hash_base || git_get_head_hash($project);
6152                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6153                                 or die_error(404, "Cannot find file");
6154                 } else {
6155                         die_error(400, "No file name defined");
6156                 }
6157         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6158                 # blobs defined by non-textual hash id's can be cached
6159                 $expires = "+1d";
6160         }
6161
6162         my $have_blame = gitweb_check_feature('blame');
6163         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6164                 or die_error(500, "Couldn't cat $file_name, $hash");
6165         my $mimetype = blob_mimetype($fd, $file_name);
6166         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6167         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6168                 close $fd;
6169                 return git_blob_plain($mimetype);
6170         }
6171         # we can have blame only for text/* mimetype
6172         $have_blame &&= ($mimetype =~ m!^text/!);
6173
6174         my $highlight = gitweb_check_feature('highlight');
6175         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6176         $fd = run_highlighter($fd, $highlight, $syntax)
6177                 if $syntax;
6178
6179         git_header_html(undef, $expires);
6180         my $formats_nav = '';
6181         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6182                 if (defined $file_name) {
6183                         if ($have_blame) {
6184                                 $formats_nav .=
6185                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6186                                                 "blame") .
6187                                         " | ";
6188                         }
6189                         $formats_nav .=
6190                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6191                                         "history") .
6192                                 " | " .
6193                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6194                                         "raw") .
6195                                 " | " .
6196                                 $cgi->a({-href => href(action=>"blob",
6197                                                        hash_base=>"HEAD", file_name=>$file_name)},
6198                                         "HEAD");
6199                 } else {
6200                         $formats_nav .=
6201                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6202                                         "raw");
6203                 }
6204                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6205                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6206         } else {
6207                 print "<div class=\"page_nav\">\n" .
6208                       "<br/><br/></div>\n" .
6209                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6210         }
6211         git_print_page_path($file_name, "blob", $hash_base);
6212         print "<div class=\"page_body\">\n";
6213         if ($mimetype =~ m!^image/!) {
6214                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6215                 if ($file_name) {
6216                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6217                 }
6218                 print qq! src="! .
6219                       href(action=>"blob_plain", hash=>$hash,
6220                            hash_base=>$hash_base, file_name=>$file_name) .
6221                       qq!" />\n!;
6222         } else {
6223                 my $nr;
6224                 while (my $line = <$fd>) {
6225                         chomp $line;
6226                         $nr++;
6227                         $line = untabify($line);
6228                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6229                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6230                 }
6231         }
6232         close $fd
6233                 or print "Reading blob failed.\n";
6234         print "</div>";
6235         git_footer_html();
6236 }
6237
6238 sub git_tree {
6239         if (!defined $hash_base) {
6240                 $hash_base = "HEAD";
6241         }
6242         if (!defined $hash) {
6243                 if (defined $file_name) {
6244                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6245                 } else {
6246                         $hash = $hash_base;
6247                 }
6248         }
6249         die_error(404, "No such tree") unless defined($hash);
6250
6251         my $show_sizes = gitweb_check_feature('show-sizes');
6252         my $have_blame = gitweb_check_feature('blame');
6253
6254         my @entries = ();
6255         {
6256                 local $/ = "\0";
6257                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6258                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6259                         or die_error(500, "Open git-ls-tree failed");
6260                 @entries = map { chomp; $_ } <$fd>;
6261                 close $fd
6262                         or die_error(404, "Reading tree failed");
6263         }
6264
6265         my $refs = git_get_references();
6266         my $ref = format_ref_marker($refs, $hash_base);
6267         git_header_html();
6268         my $basedir = '';
6269         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6270                 my @views_nav = ();
6271                 if (defined $file_name) {
6272                         push @views_nav,
6273                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6274                                         "history"),
6275                                 $cgi->a({-href => href(action=>"tree",
6276                                                        hash_base=>"HEAD", file_name=>$file_name)},
6277                                         "HEAD"),
6278                 }
6279                 my $snapshot_links = format_snapshot_links($hash);
6280                 if (defined $snapshot_links) {
6281                         # FIXME: Should be available when we have no hash base as well.
6282                         push @views_nav, $snapshot_links;
6283                 }
6284                 git_print_page_nav('tree','', $hash_base, undef, undef,
6285                                    join(' | ', @views_nav));
6286                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6287         } else {
6288                 undef $hash_base;
6289                 print "<div class=\"page_nav\">\n";
6290                 print "<br/><br/></div>\n";
6291                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6292         }
6293         if (defined $file_name) {
6294                 $basedir = $file_name;
6295                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6296                         $basedir .= '/';
6297                 }
6298                 git_print_page_path($file_name, 'tree', $hash_base);
6299         }
6300         print "<div class=\"page_body\">\n";
6301         print "<table class=\"tree\">\n";
6302         my $alternate = 1;
6303         # '..' (top directory) link if possible
6304         if (defined $hash_base &&
6305             defined $file_name && $file_name =~ m![^/]+$!) {
6306                 if ($alternate) {
6307                         print "<tr class=\"dark\">\n";
6308                 } else {
6309                         print "<tr class=\"light\">\n";
6310                 }
6311                 $alternate ^= 1;
6312
6313                 my $up = $file_name;
6314                 $up =~ s!/?[^/]+$!!;
6315                 undef $up unless $up;
6316                 # based on git_print_tree_entry
6317                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6318                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6319                 print '<td class="list">';
6320                 print $cgi->a({-href => href(action=>"tree",
6321                                              hash_base=>$hash_base,
6322                                              file_name=>$up)},
6323                               "..");
6324                 print "</td>\n";
6325                 print "<td class=\"link\"></td>\n";
6326
6327                 print "</tr>\n";
6328         }
6329         foreach my $line (@entries) {
6330                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6331
6332                 if ($alternate) {
6333                         print "<tr class=\"dark\">\n";
6334                 } else {
6335                         print "<tr class=\"light\">\n";
6336                 }
6337                 $alternate ^= 1;
6338
6339                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6340
6341                 print "</tr>\n";
6342         }
6343         print "</table>\n" .
6344               "</div>";
6345         git_footer_html();
6346 }
6347
6348 sub snapshot_name {
6349         my ($project, $hash) = @_;
6350
6351         # path/to/project.git  -> project
6352         # path/to/project/.git -> project
6353         my $name = to_utf8($project);
6354         $name =~ s,([^/])/*\.git$,$1,;
6355         $name = basename($name);
6356         # sanitize name
6357         $name =~ s/[[:cntrl:]]/?/g;
6358
6359         my $ver = $hash;
6360         if ($hash =~ /^[0-9a-fA-F]+$/) {
6361                 # shorten SHA-1 hash
6362                 my $full_hash = git_get_full_hash($project, $hash);
6363                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6364                         $ver = git_get_short_hash($project, $hash);
6365                 }
6366         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6367                 # tags don't need shortened SHA-1 hash
6368                 $ver = $1;
6369         } else {
6370                 # branches and other need shortened SHA-1 hash
6371                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6372                         $ver = $1;
6373                 }
6374                 $ver .= '-' . git_get_short_hash($project, $hash);
6375         }
6376         # in case of hierarchical branch names
6377         $ver =~ s!/!.!g;
6378
6379         # name = project-version_string
6380         $name = "$name-$ver";
6381
6382         return wantarray ? ($name, $name) : $name;
6383 }
6384
6385 sub git_snapshot {
6386         my $format = $input_params{'snapshot_format'};
6387         if (!@snapshot_fmts) {
6388                 die_error(403, "Snapshots not allowed");
6389         }
6390         # default to first supported snapshot format
6391         $format ||= $snapshot_fmts[0];
6392         if ($format !~ m/^[a-z0-9]+$/) {
6393                 die_error(400, "Invalid snapshot format parameter");
6394         } elsif (!exists($known_snapshot_formats{$format})) {
6395                 die_error(400, "Unknown snapshot format");
6396         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6397                 die_error(403, "Snapshot format not allowed");
6398         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6399                 die_error(403, "Unsupported snapshot format");
6400         }
6401
6402         my $type = git_get_type("$hash^{}");
6403         if (!$type) {
6404                 die_error(404, 'Object does not exist');
6405         }  elsif ($type eq 'blob') {
6406                 die_error(400, 'Object is not a tree-ish');
6407         }
6408
6409         my ($name, $prefix) = snapshot_name($project, $hash);
6410         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6411         my $cmd = quote_command(
6412                 git_cmd(), 'archive',
6413                 "--format=$known_snapshot_formats{$format}{'format'}",
6414                 "--prefix=$prefix/", $hash);
6415         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6416                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6417         }
6418
6419         $filename =~ s/(["\\])/\\$1/g;
6420         print $cgi->header(
6421                 -type => $known_snapshot_formats{$format}{'type'},
6422                 -content_disposition => 'inline; filename="' . $filename . '"',
6423                 -status => '200 OK');
6424
6425         open my $fd, "-|", $cmd
6426                 or die_error(500, "Execute git-archive failed");
6427         binmode STDOUT, ':raw';
6428         print <$fd>;
6429         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6430         close $fd;
6431 }
6432
6433 sub git_log_generic {
6434         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6435
6436         my $head = git_get_head_hash($project);
6437         if (!defined $base) {
6438                 $base = $head;
6439         }
6440         if (!defined $page) {
6441                 $page = 0;
6442         }
6443         my $refs = git_get_references();
6444
6445         my $commit_hash = $base;
6446         if (defined $parent) {
6447                 $commit_hash = "$parent..$base";
6448         }
6449         my @commitlist =
6450                 parse_commits($commit_hash, 101, (100 * $page),
6451                               defined $file_name ? ($file_name, "--full-history") : ());
6452
6453         my $ftype;
6454         if (!defined $file_hash && defined $file_name) {
6455                 # some commits could have deleted file in question,
6456                 # and not have it in tree, but one of them has to have it
6457                 for (my $i = 0; $i < @commitlist; $i++) {
6458                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6459                         last if defined $file_hash;
6460                 }
6461         }
6462         if (defined $file_hash) {
6463                 $ftype = git_get_type($file_hash);
6464         }
6465         if (defined $file_name && !defined $ftype) {
6466                 die_error(500, "Unknown type of object");
6467         }
6468         my %co;
6469         if (defined $file_name) {
6470                 %co = parse_commit($base)
6471                         or die_error(404, "Unknown commit object");
6472         }
6473
6474
6475         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6476         my $next_link = '';
6477         if ($#commitlist >= 100) {
6478                 $next_link =
6479                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6480                                  -accesskey => "n", -title => "Alt-n"}, "next");
6481         }
6482         my $patch_max = gitweb_get_feature('patches');
6483         if ($patch_max && !defined $file_name) {
6484                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6485                         $paging_nav .= " &sdot; " .
6486                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6487                                         "patches");
6488                 }
6489         }
6490
6491         git_header_html();
6492         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6493         if (defined $file_name) {
6494                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6495         } else {
6496                 git_print_header_div('summary', $project)
6497         }
6498         git_print_page_path($file_name, $ftype, $hash_base)
6499                 if (defined $file_name);
6500
6501         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6502                      $file_name, $file_hash, $ftype);
6503
6504         git_footer_html();
6505 }
6506
6507 sub git_log {
6508         git_log_generic('log', \&git_log_body,
6509                         $hash, $hash_parent);
6510 }
6511
6512 sub git_commit {
6513         $hash ||= $hash_base || "HEAD";
6514         my %co = parse_commit($hash)
6515             or die_error(404, "Unknown commit object");
6516
6517         my $parent  = $co{'parent'};
6518         my $parents = $co{'parents'}; # listref
6519
6520         # we need to prepare $formats_nav before any parameter munging
6521         my $formats_nav;
6522         if (!defined $parent) {
6523                 # --root commitdiff
6524                 $formats_nav .= '(initial)';
6525         } elsif (@$parents == 1) {
6526                 # single parent commit
6527                 $formats_nav .=
6528                         '(parent: ' .
6529                         $cgi->a({-href => href(action=>"commit",
6530                                                hash=>$parent)},
6531                                 esc_html(substr($parent, 0, 7))) .
6532                         ')';
6533         } else {
6534                 # merge commit
6535                 $formats_nav .=
6536                         '(merge: ' .
6537                         join(' ', map {
6538                                 $cgi->a({-href => href(action=>"commit",
6539                                                        hash=>$_)},
6540                                         esc_html(substr($_, 0, 7)));
6541                         } @$parents ) .
6542                         ')';
6543         }
6544         if (gitweb_check_feature('patches') && @$parents <= 1) {
6545                 $formats_nav .= " | " .
6546                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6547                                 "patch");
6548         }
6549
6550         if (!defined $parent) {
6551                 $parent = "--root";
6552         }
6553         my @difftree;
6554         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6555                 @diff_opts,
6556                 (@$parents <= 1 ? $parent : '-c'),
6557                 $hash, "--"
6558                 or die_error(500, "Open git-diff-tree failed");
6559         @difftree = map { chomp; $_ } <$fd>;
6560         close $fd or die_error(404, "Reading git-diff-tree failed");
6561
6562         # non-textual hash id's can be cached
6563         my $expires;
6564         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6565                 $expires = "+1d";
6566         }
6567         my $refs = git_get_references();
6568         my $ref = format_ref_marker($refs, $co{'id'});
6569
6570         git_header_html(undef, $expires);
6571         git_print_page_nav('commit', '',
6572                            $hash, $co{'tree'}, $hash,
6573                            $formats_nav);
6574
6575         if (defined $co{'parent'}) {
6576                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6577         } else {
6578                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6579         }
6580         print "<div class=\"title_text\">\n" .
6581               "<table class=\"object_header\">\n";
6582         git_print_authorship_rows(\%co);
6583         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6584         print "<tr>" .
6585               "<td>tree</td>" .
6586               "<td class=\"sha1\">" .
6587               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6588                        class => "list"}, $co{'tree'}) .
6589               "</td>" .
6590               "<td class=\"link\">" .
6591               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6592                       "tree");
6593         my $snapshot_links = format_snapshot_links($hash);
6594         if (defined $snapshot_links) {
6595                 print " | " . $snapshot_links;
6596         }
6597         print "</td>" .
6598               "</tr>\n";
6599
6600         foreach my $par (@$parents) {
6601                 print "<tr>" .
6602                       "<td>parent</td>" .
6603                       "<td class=\"sha1\">" .
6604                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6605                                class => "list"}, $par) .
6606                       "</td>" .
6607                       "<td class=\"link\">" .
6608                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6609                       " | " .
6610                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6611                       "</td>" .
6612                       "</tr>\n";
6613         }
6614         print "</table>".
6615               "</div>\n";
6616
6617         print "<div class=\"page_body\">\n";
6618         git_print_log($co{'comment'});
6619         print "</div>\n";
6620
6621         git_difftree_body(\@difftree, $hash, @$parents);
6622
6623         git_footer_html();
6624 }
6625
6626 sub git_object {
6627         # object is defined by:
6628         # - hash or hash_base alone
6629         # - hash_base and file_name
6630         my $type;
6631
6632         # - hash or hash_base alone
6633         if ($hash || ($hash_base && !defined $file_name)) {
6634                 my $object_id = $hash || $hash_base;
6635
6636                 open my $fd, "-|", quote_command(
6637                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6638                         or die_error(404, "Object does not exist");
6639                 $type = <$fd>;
6640                 chomp $type;
6641                 close $fd
6642                         or die_error(404, "Object does not exist");
6643
6644         # - hash_base and file_name
6645         } elsif ($hash_base && defined $file_name) {
6646                 $file_name =~ s,/+$,,;
6647
6648                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6649                         or die_error(404, "Base object does not exist");
6650
6651                 # here errors should not hapen
6652                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6653                         or die_error(500, "Open git-ls-tree failed");
6654                 my $line = <$fd>;
6655                 close $fd;
6656
6657                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6658                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6659                         die_error(404, "File or directory for given base does not exist");
6660                 }
6661                 $type = $2;
6662                 $hash = $3;
6663         } else {
6664                 die_error(400, "Not enough information to find object");
6665         }
6666
6667         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6668                                           hash=>$hash, hash_base=>$hash_base,
6669                                           file_name=>$file_name),
6670                              -status => '302 Found');
6671 }
6672
6673 sub git_blobdiff {
6674         my $format = shift || 'html';
6675
6676         my $fd;
6677         my @difftree;
6678         my %diffinfo;
6679         my $expires;
6680
6681         # preparing $fd and %diffinfo for git_patchset_body
6682         # new style URI
6683         if (defined $hash_base && defined $hash_parent_base) {
6684                 if (defined $file_name) {
6685                         # read raw output
6686                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6687                                 $hash_parent_base, $hash_base,
6688                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6689                                 or die_error(500, "Open git-diff-tree failed");
6690                         @difftree = map { chomp; $_ } <$fd>;
6691                         close $fd
6692                                 or die_error(404, "Reading git-diff-tree failed");
6693                         @difftree
6694                                 or die_error(404, "Blob diff not found");
6695
6696                 } elsif (defined $hash &&
6697                          $hash =~ /[0-9a-fA-F]{40}/) {
6698                         # try to find filename from $hash
6699
6700                         # read filtered raw output
6701                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6702                                 $hash_parent_base, $hash_base, "--"
6703                                 or die_error(500, "Open git-diff-tree failed");
6704                         @difftree =
6705                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6706                                 # $hash == to_id
6707                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6708                                 map { chomp; $_ } <$fd>;
6709                         close $fd
6710                                 or die_error(404, "Reading git-diff-tree failed");
6711                         @difftree
6712                                 or die_error(404, "Blob diff not found");
6713
6714                 } else {
6715                         die_error(400, "Missing one of the blob diff parameters");
6716                 }
6717
6718                 if (@difftree > 1) {
6719                         die_error(400, "Ambiguous blob diff specification");
6720                 }
6721
6722                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6723                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6724                 $file_name   ||= $diffinfo{'to_file'};
6725
6726                 $hash_parent ||= $diffinfo{'from_id'};
6727                 $hash        ||= $diffinfo{'to_id'};
6728
6729                 # non-textual hash id's can be cached
6730                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6731                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6732                         $expires = '+1d';
6733                 }
6734
6735                 # open patch output
6736                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6737                         '-p', ($format eq 'html' ? "--full-index" : ()),
6738                         $hash_parent_base, $hash_base,
6739                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6740                         or die_error(500, "Open git-diff-tree failed");
6741         }
6742
6743         # old/legacy style URI -- not generated anymore since 1.4.3.
6744         if (!%diffinfo) {
6745                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6746         }
6747
6748         # header
6749         if ($format eq 'html') {
6750                 my $formats_nav =
6751                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6752                                 "raw");
6753                 git_header_html(undef, $expires);
6754                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6755                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6756                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6757                 } else {
6758                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6759                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6760                 }
6761                 if (defined $file_name) {
6762                         git_print_page_path($file_name, "blob", $hash_base);
6763                 } else {
6764                         print "<div class=\"page_path\"></div>\n";
6765                 }
6766
6767         } elsif ($format eq 'plain') {
6768                 print $cgi->header(
6769                         -type => 'text/plain',
6770                         -charset => 'utf-8',
6771                         -expires => $expires,
6772                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6773
6774                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6775
6776         } else {
6777                 die_error(400, "Unknown blobdiff format");
6778         }
6779
6780         # patch
6781         if ($format eq 'html') {
6782                 print "<div class=\"page_body\">\n";
6783
6784                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6785                 close $fd;
6786
6787                 print "</div>\n"; # class="page_body"
6788                 git_footer_html();
6789
6790         } else {
6791                 while (my $line = <$fd>) {
6792                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6793                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6794
6795                         print $line;
6796
6797                         last if $line =~ m!^\+\+\+!;
6798                 }
6799                 local $/ = undef;
6800                 print <$fd>;
6801                 close $fd;
6802         }
6803 }
6804
6805 sub git_blobdiff_plain {
6806         git_blobdiff('plain');
6807 }
6808
6809 sub git_commitdiff {
6810         my %params = @_;
6811         my $format = $params{-format} || 'html';
6812
6813         my ($patch_max) = gitweb_get_feature('patches');
6814         if ($format eq 'patch') {
6815                 die_error(403, "Patch view not allowed") unless $patch_max;
6816         }
6817
6818         $hash ||= $hash_base || "HEAD";
6819         my %co = parse_commit($hash)
6820             or die_error(404, "Unknown commit object");
6821
6822         # choose format for commitdiff for merge
6823         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6824                 $hash_parent = '--cc';
6825         }
6826         # we need to prepare $formats_nav before almost any parameter munging
6827         my $formats_nav;
6828         if ($format eq 'html') {
6829                 $formats_nav =
6830                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6831                                 "raw");
6832                 if ($patch_max && @{$co{'parents'}} <= 1) {
6833                         $formats_nav .= " | " .
6834                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6835                                         "patch");
6836                 }
6837
6838                 if (defined $hash_parent &&
6839                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6840                         # commitdiff with two commits given
6841                         my $hash_parent_short = $hash_parent;
6842                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6843                                 $hash_parent_short = substr($hash_parent, 0, 7);
6844                         }
6845                         $formats_nav .=
6846                                 ' (from';
6847                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6848                                 if ($co{'parents'}[$i] eq $hash_parent) {
6849                                         $formats_nav .= ' parent ' . ($i+1);
6850                                         last;
6851                                 }
6852                         }
6853                         $formats_nav .= ': ' .
6854                                 $cgi->a({-href => href(action=>"commitdiff",
6855                                                        hash=>$hash_parent)},
6856                                         esc_html($hash_parent_short)) .
6857                                 ')';
6858                 } elsif (!$co{'parent'}) {
6859                         # --root commitdiff
6860                         $formats_nav .= ' (initial)';
6861                 } elsif (scalar @{$co{'parents'}} == 1) {
6862                         # single parent commit
6863                         $formats_nav .=
6864                                 ' (parent: ' .
6865                                 $cgi->a({-href => href(action=>"commitdiff",
6866                                                        hash=>$co{'parent'})},
6867                                         esc_html(substr($co{'parent'}, 0, 7))) .
6868                                 ')';
6869                 } else {
6870                         # merge commit
6871                         if ($hash_parent eq '--cc') {
6872                                 $formats_nav .= ' | ' .
6873                                         $cgi->a({-href => href(action=>"commitdiff",
6874                                                                hash=>$hash, hash_parent=>'-c')},
6875                                                 'combined');
6876                         } else { # $hash_parent eq '-c'
6877                                 $formats_nav .= ' | ' .
6878                                         $cgi->a({-href => href(action=>"commitdiff",
6879                                                                hash=>$hash, hash_parent=>'--cc')},
6880                                                 'compact');
6881                         }
6882                         $formats_nav .=
6883                                 ' (merge: ' .
6884                                 join(' ', map {
6885                                         $cgi->a({-href => href(action=>"commitdiff",
6886                                                                hash=>$_)},
6887                                                 esc_html(substr($_, 0, 7)));
6888                                 } @{$co{'parents'}} ) .
6889                                 ')';
6890                 }
6891         }
6892
6893         my $hash_parent_param = $hash_parent;
6894         if (!defined $hash_parent_param) {
6895                 # --cc for multiple parents, --root for parentless
6896                 $hash_parent_param =
6897                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6898         }
6899
6900         # read commitdiff
6901         my $fd;
6902         my @difftree;
6903         if ($format eq 'html') {
6904                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6905                         "--no-commit-id", "--patch-with-raw", "--full-index",
6906                         $hash_parent_param, $hash, "--"
6907                         or die_error(500, "Open git-diff-tree failed");
6908
6909                 while (my $line = <$fd>) {
6910                         chomp $line;
6911                         # empty line ends raw part of diff-tree output
6912                         last unless $line;
6913                         push @difftree, scalar parse_difftree_raw_line($line);
6914                 }
6915
6916         } elsif ($format eq 'plain') {
6917                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6918                         '-p', $hash_parent_param, $hash, "--"
6919                         or die_error(500, "Open git-diff-tree failed");
6920         } elsif ($format eq 'patch') {
6921                 # For commit ranges, we limit the output to the number of
6922                 # patches specified in the 'patches' feature.
6923                 # For single commits, we limit the output to a single patch,
6924                 # diverging from the git-format-patch default.
6925                 my @commit_spec = ();
6926                 if ($hash_parent) {
6927                         if ($patch_max > 0) {
6928                                 push @commit_spec, "-$patch_max";
6929                         }
6930                         push @commit_spec, '-n', "$hash_parent..$hash";
6931                 } else {
6932                         if ($params{-single}) {
6933                                 push @commit_spec, '-1';
6934                         } else {
6935                                 if ($patch_max > 0) {
6936                                         push @commit_spec, "-$patch_max";
6937                                 }
6938                                 push @commit_spec, "-n";
6939                         }
6940                         push @commit_spec, '--root', $hash;
6941                 }
6942                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6943                         '--encoding=utf8', '--stdout', @commit_spec
6944                         or die_error(500, "Open git-format-patch failed");
6945         } else {
6946                 die_error(400, "Unknown commitdiff format");
6947         }
6948
6949         # non-textual hash id's can be cached
6950         my $expires;
6951         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6952                 $expires = "+1d";
6953         }
6954
6955         # write commit message
6956         if ($format eq 'html') {
6957                 my $refs = git_get_references();
6958                 my $ref = format_ref_marker($refs, $co{'id'});
6959
6960                 git_header_html(undef, $expires);
6961                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6962                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6963                 print "<div class=\"title_text\">\n" .
6964                       "<table class=\"object_header\">\n";
6965                 git_print_authorship_rows(\%co);
6966                 print "</table>".
6967                       "</div>\n";
6968                 print "<div class=\"page_body\">\n";
6969                 if (@{$co{'comment'}} > 1) {
6970                         print "<div class=\"log\">\n";
6971                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6972                         print "</div>\n"; # class="log"
6973                 }
6974
6975         } elsif ($format eq 'plain') {
6976                 my $refs = git_get_references("tags");
6977                 my $tagname = git_get_rev_name_tags($hash);
6978                 my $filename = basename($project) . "-$hash.patch";
6979
6980                 print $cgi->header(
6981                         -type => 'text/plain',
6982                         -charset => 'utf-8',
6983                         -expires => $expires,
6984                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6985                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6986                 print "From: " . to_utf8($co{'author'}) . "\n";
6987                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6988                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6989
6990                 print "X-Git-Tag: $tagname\n" if $tagname;
6991                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6992
6993                 foreach my $line (@{$co{'comment'}}) {
6994                         print to_utf8($line) . "\n";
6995                 }
6996                 print "---\n\n";
6997         } elsif ($format eq 'patch') {
6998                 my $filename = basename($project) . "-$hash.patch";
6999
7000                 print $cgi->header(
7001                         -type => 'text/plain',
7002                         -charset => 'utf-8',
7003                         -expires => $expires,
7004                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7005         }
7006
7007         # write patch
7008         if ($format eq 'html') {
7009                 my $use_parents = !defined $hash_parent ||
7010                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7011                 git_difftree_body(\@difftree, $hash,
7012                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7013                 print "<br/>\n";
7014
7015                 git_patchset_body($fd, \@difftree, $hash,
7016                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7017                 close $fd;
7018                 print "</div>\n"; # class="page_body"
7019                 git_footer_html();
7020
7021         } elsif ($format eq 'plain') {
7022                 local $/ = undef;
7023                 print <$fd>;
7024                 close $fd
7025                         or print "Reading git-diff-tree failed\n";
7026         } elsif ($format eq 'patch') {
7027                 local $/ = undef;
7028                 print <$fd>;
7029                 close $fd
7030                         or print "Reading git-format-patch failed\n";
7031         }
7032 }
7033
7034 sub git_commitdiff_plain {
7035         git_commitdiff(-format => 'plain');
7036 }
7037
7038 # format-patch-style patches
7039 sub git_patch {
7040         git_commitdiff(-format => 'patch', -single => 1);
7041 }
7042
7043 sub git_patches {
7044         git_commitdiff(-format => 'patch');
7045 }
7046
7047 sub git_history {
7048         git_log_generic('history', \&git_history_body,
7049                         $hash_base, $hash_parent_base,
7050                         $file_name, $hash);
7051 }
7052
7053 sub git_search {
7054         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7055         if (!defined $searchtext) {
7056                 die_error(400, "Text field is empty");
7057         }
7058         if (!defined $hash) {
7059                 $hash = git_get_head_hash($project);
7060         }
7061         my %co = parse_commit($hash);
7062         if (!%co) {
7063                 die_error(404, "Unknown commit object");
7064         }
7065         if (!defined $page) {
7066                 $page = 0;
7067         }
7068
7069         $searchtype ||= 'commit';
7070         if ($searchtype eq 'pickaxe') {
7071                 # pickaxe may take all resources of your box and run for several minutes
7072                 # with every query - so decide by yourself how public you make this feature
7073                 gitweb_check_feature('pickaxe')
7074                     or die_error(403, "Pickaxe is disabled");
7075         }
7076         if ($searchtype eq 'grep') {
7077                 gitweb_check_feature('grep')[0]
7078                     or die_error(403, "Grep is disabled");
7079         }
7080
7081         git_header_html();
7082
7083         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7084                 my $greptype;
7085                 if ($searchtype eq 'commit') {
7086                         $greptype = "--grep=";
7087                 } elsif ($searchtype eq 'author') {
7088                         $greptype = "--author=";
7089                 } elsif ($searchtype eq 'committer') {
7090                         $greptype = "--committer=";
7091                 }
7092                 $greptype .= $searchtext;
7093                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7094                                                $greptype, '--regexp-ignore-case',
7095                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7096
7097                 my $paging_nav = '';
7098                 if ($page > 0) {
7099                         $paging_nav .=
7100                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7101                                                        searchtext=>$searchtext,
7102                                                        searchtype=>$searchtype)},
7103                                         "first");
7104                         $paging_nav .= " &sdot; " .
7105                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7106                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7107                 } else {
7108                         $paging_nav .= "first";
7109                         $paging_nav .= " &sdot; prev";
7110                 }
7111                 my $next_link = '';
7112                 if ($#commitlist >= 100) {
7113                         $next_link =
7114                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7115                                          -accesskey => "n", -title => "Alt-n"}, "next");
7116                         $paging_nav .= " &sdot; $next_link";
7117                 } else {
7118                         $paging_nav .= " &sdot; next";
7119                 }
7120
7121                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7122                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7123                 if ($page == 0 && !@commitlist) {
7124                         print "<p>No match.</p>\n";
7125                 } else {
7126                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7127                 }
7128         }
7129
7130         if ($searchtype eq 'pickaxe') {
7131                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7132                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7133
7134                 print "<table class=\"pickaxe search\">\n";
7135                 my $alternate = 1;
7136                 local $/ = "\n";
7137                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7138                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7139                         ($search_use_regexp ? '--pickaxe-regex' : ());
7140                 undef %co;
7141                 my @files;
7142                 while (my $line = <$fd>) {
7143                         chomp $line;
7144                         next unless $line;
7145
7146                         my %set = parse_difftree_raw_line($line);
7147                         if (defined $set{'commit'}) {
7148                                 # finish previous commit
7149                                 if (%co) {
7150                                         print "</td>\n" .
7151                                               "<td class=\"link\">" .
7152                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7153                                               " | " .
7154                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7155                                         print "</td>\n" .
7156                                               "</tr>\n";
7157                                 }
7158
7159                                 if ($alternate) {
7160                                         print "<tr class=\"dark\">\n";
7161                                 } else {
7162                                         print "<tr class=\"light\">\n";
7163                                 }
7164                                 $alternate ^= 1;
7165                                 %co = parse_commit($set{'commit'});
7166                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7167                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7168                                       "<td><i>$author</i></td>\n" .
7169                                       "<td>" .
7170                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7171                                               -class => "list subject"},
7172                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7173                         } elsif (defined $set{'to_id'}) {
7174                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7175
7176                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7177                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7178                                               -class => "list"},
7179                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7180                                       "<br/>\n";
7181                         }
7182                 }
7183                 close $fd;
7184
7185                 # finish last commit (warning: repetition!)
7186                 if (%co) {
7187                         print "</td>\n" .
7188                               "<td class=\"link\">" .
7189                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7190                               " | " .
7191                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7192                         print "</td>\n" .
7193                               "</tr>\n";
7194                 }
7195
7196                 print "</table>\n";
7197         }
7198
7199         if ($searchtype eq 'grep') {
7200                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7201                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7202
7203                 print "<table class=\"grep_search\">\n";
7204                 my $alternate = 1;
7205                 my $matches = 0;
7206                 local $/ = "\n";
7207                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7208                         $search_use_regexp ? ('-E', '-i') : '-F',
7209                         $searchtext, $co{'tree'};
7210                 my $lastfile = '';
7211                 while (my $line = <$fd>) {
7212                         chomp $line;
7213                         my ($file, $lno, $ltext, $binary);
7214                         last if ($matches++ > 1000);
7215                         if ($line =~ /^Binary file (.+) matches$/) {
7216                                 $file = $1;
7217                                 $binary = 1;
7218                         } else {
7219                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7220                         }
7221                         if ($file ne $lastfile) {
7222                                 $lastfile and print "</td></tr>\n";
7223                                 if ($alternate++) {
7224                                         print "<tr class=\"dark\">\n";
7225                                 } else {
7226                                         print "<tr class=\"light\">\n";
7227                                 }
7228                                 print "<td class=\"list\">".
7229                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7230                                                                file_name=>"$file"),
7231                                                 -class => "list"}, esc_path($file));
7232                                 print "</td><td>\n";
7233                                 $lastfile = $file;
7234                         }
7235                         if ($binary) {
7236                                 print "<div class=\"binary\">Binary file</div>\n";
7237                         } else {
7238                                 $ltext = untabify($ltext);
7239                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7240                                         $ltext = esc_html($1, -nbsp=>1);
7241                                         $ltext .= '<span class="match">';
7242                                         $ltext .= esc_html($2, -nbsp=>1);
7243                                         $ltext .= '</span>';
7244                                         $ltext .= esc_html($3, -nbsp=>1);
7245                                 } else {
7246                                         $ltext = esc_html($ltext, -nbsp=>1);
7247                                 }
7248                                 print "<div class=\"pre\">" .
7249                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7250                                                                file_name=>"$file").'#l'.$lno,
7251                                                 -class => "linenr"}, sprintf('%4i', $lno))
7252                                         . ' ' .  $ltext . "</div>\n";
7253                         }
7254                 }
7255                 if ($lastfile) {
7256                         print "</td></tr>\n";
7257                         if ($matches > 1000) {
7258                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7259                         }
7260                 } else {
7261                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7262                 }
7263                 close $fd;
7264
7265                 print "</table>\n";
7266         }
7267         git_footer_html();
7268 }
7269
7270 sub git_search_help {
7271         git_header_html();
7272         git_print_page_nav('','', $hash,$hash,$hash);
7273         print <<EOT;
7274 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7275 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7276 the pattern entered is recognized as the POSIX extended
7277 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7278 insensitive).</p>
7279 <dl>
7280 <dt><b>commit</b></dt>
7281 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7282 EOT
7283         my $have_grep = gitweb_check_feature('grep');
7284         if ($have_grep) {
7285                 print <<EOT;
7286 <dt><b>grep</b></dt>
7287 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7288     a different one) are searched for the given pattern. On large trees, this search can take
7289 a while and put some strain on the server, so please use it with some consideration. Note that
7290 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7291 case-sensitive.</dd>
7292 EOT
7293         }
7294         print <<EOT;
7295 <dt><b>author</b></dt>
7296 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7297 <dt><b>committer</b></dt>
7298 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7299 EOT
7300         my $have_pickaxe = gitweb_check_feature('pickaxe');
7301         if ($have_pickaxe) {
7302                 print <<EOT;
7303 <dt><b>pickaxe</b></dt>
7304 <dd>All commits that caused the string to appear or disappear from any file (changes that
7305 added, removed or "modified" the string) will be listed. This search can take a while and
7306 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7307 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7308 EOT
7309         }
7310         print "</dl>\n";
7311         git_footer_html();
7312 }
7313
7314 sub git_shortlog {
7315         git_log_generic('shortlog', \&git_shortlog_body,
7316                         $hash, $hash_parent);
7317 }
7318
7319 ## ......................................................................
7320 ## feeds (RSS, Atom; OPML)
7321
7322 sub git_feed {
7323         my $format = shift || 'atom';
7324         my $have_blame = gitweb_check_feature('blame');
7325
7326         # Atom: http://www.atomenabled.org/developers/syndication/
7327         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7328         if ($format ne 'rss' && $format ne 'atom') {
7329                 die_error(400, "Unknown web feed format");
7330         }
7331
7332         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7333         my $head = $hash || 'HEAD';
7334         my @commitlist = parse_commits($head, 150, 0, $file_name);
7335
7336         my %latest_commit;
7337         my %latest_date;
7338         my $content_type = "application/$format+xml";
7339         if (defined $cgi->http('HTTP_ACCEPT') &&
7340                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7341                 # browser (feed reader) prefers text/xml
7342                 $content_type = 'text/xml';
7343         }
7344         if (defined($commitlist[0])) {
7345                 %latest_commit = %{$commitlist[0]};
7346                 my $latest_epoch = $latest_commit{'committer_epoch'};
7347                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7348                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7349                 if (defined $if_modified) {
7350                         my $since;
7351                         if (eval { require HTTP::Date; 1; }) {
7352                                 $since = HTTP::Date::str2time($if_modified);
7353                         } elsif (eval { require Time::ParseDate; 1; }) {
7354                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7355                         }
7356                         if (defined $since && $latest_epoch <= $since) {
7357                                 print $cgi->header(
7358                                         -type => $content_type,
7359                                         -charset => 'utf-8',
7360                                         -last_modified => $latest_date{'rfc2822'},
7361                                         -status => '304 Not Modified');
7362                                 return;
7363                         }
7364                 }
7365                 print $cgi->header(
7366                         -type => $content_type,
7367                         -charset => 'utf-8',
7368                         -last_modified => $latest_date{'rfc2822'});
7369         } else {
7370                 print $cgi->header(
7371                         -type => $content_type,
7372                         -charset => 'utf-8');
7373         }
7374
7375         # Optimization: skip generating the body if client asks only
7376         # for Last-Modified date.
7377         return if ($cgi->request_method() eq 'HEAD');
7378
7379         # header variables
7380         my $title = "$site_name - $project/$action";
7381         my $feed_type = 'log';
7382         if (defined $hash) {
7383                 $title .= " - '$hash'";
7384                 $feed_type = 'branch log';
7385                 if (defined $file_name) {
7386                         $title .= " :: $file_name";
7387                         $feed_type = 'history';
7388                 }
7389         } elsif (defined $file_name) {
7390                 $title .= " - $file_name";
7391                 $feed_type = 'history';
7392         }
7393         $title .= " $feed_type";
7394         my $descr = git_get_project_description($project);
7395         if (defined $descr) {
7396                 $descr = esc_html($descr);
7397         } else {
7398                 $descr = "$project " .
7399                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7400                          " feed";
7401         }
7402         my $owner = git_get_project_owner($project);
7403         $owner = esc_html($owner);
7404
7405         #header
7406         my $alt_url;
7407         if (defined $file_name) {
7408                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7409         } elsif (defined $hash) {
7410                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7411         } else {
7412                 $alt_url = href(-full=>1, action=>"summary");
7413         }
7414         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7415         if ($format eq 'rss') {
7416                 print <<XML;
7417 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7418 <channel>
7419 XML
7420                 print "<title>$title</title>\n" .
7421                       "<link>$alt_url</link>\n" .
7422                       "<description>$descr</description>\n" .
7423                       "<language>en</language>\n" .
7424                       # project owner is responsible for 'editorial' content
7425                       "<managingEditor>$owner</managingEditor>\n";
7426                 if (defined $logo || defined $favicon) {
7427                         # prefer the logo to the favicon, since RSS
7428                         # doesn't allow both
7429                         my $img = esc_url($logo || $favicon);
7430                         print "<image>\n" .
7431                               "<url>$img</url>\n" .
7432                               "<title>$title</title>\n" .
7433                               "<link>$alt_url</link>\n" .
7434                               "</image>\n";
7435                 }
7436                 if (%latest_date) {
7437                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7438                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7439                 }
7440                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7441         } elsif ($format eq 'atom') {
7442                 print <<XML;
7443 <feed xmlns="http://www.w3.org/2005/Atom">
7444 XML
7445                 print "<title>$title</title>\n" .
7446                       "<subtitle>$descr</subtitle>\n" .
7447                       '<link rel="alternate" type="text/html" href="' .
7448                       $alt_url . '" />' . "\n" .
7449                       '<link rel="self" type="' . $content_type . '" href="' .
7450                       $cgi->self_url() . '" />' . "\n" .
7451                       "<id>" . href(-full=>1) . "</id>\n" .
7452                       # use project owner for feed author
7453                       "<author><name>$owner</name></author>\n";
7454                 if (defined $favicon) {
7455                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7456                 }
7457                 if (defined $logo) {
7458                         # not twice as wide as tall: 72 x 27 pixels
7459                         print "<logo>" . esc_url($logo) . "</logo>\n";
7460                 }
7461                 if (! %latest_date) {
7462                         # dummy date to keep the feed valid until commits trickle in:
7463                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7464                 } else {
7465                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7466                 }
7467                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7468         }
7469
7470         # contents
7471         for (my $i = 0; $i <= $#commitlist; $i++) {
7472                 my %co = %{$commitlist[$i]};
7473                 my $commit = $co{'id'};
7474                 # we read 150, we always show 30 and the ones more recent than 48 hours
7475                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7476                         last;
7477                 }
7478                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7479
7480                 # get list of changed files
7481                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7482                         $co{'parent'} || "--root",
7483                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7484                         or next;
7485                 my @difftree = map { chomp; $_ } <$fd>;
7486                 close $fd
7487                         or next;
7488
7489                 # print element (entry, item)
7490                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7491                 if ($format eq 'rss') {
7492                         print "<item>\n" .
7493                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7494                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7495                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7496                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7497                               "<link>$co_url</link>\n" .
7498                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7499                               "<content:encoded>" .
7500                               "<![CDATA[\n";
7501                 } elsif ($format eq 'atom') {
7502                         print "<entry>\n" .
7503                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7504                               "<updated>$cd{'iso-8601'}</updated>\n" .
7505                               "<author>\n" .
7506                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7507                         if ($co{'author_email'}) {
7508                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7509                         }
7510                         print "</author>\n" .
7511                               # use committer for contributor
7512                               "<contributor>\n" .
7513                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7514                         if ($co{'committer_email'}) {
7515                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7516                         }
7517                         print "</contributor>\n" .
7518                               "<published>$cd{'iso-8601'}</published>\n" .
7519                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7520                               "<id>$co_url</id>\n" .
7521                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7522                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7523                 }
7524                 my $comment = $co{'comment'};
7525                 print "<pre>\n";
7526                 foreach my $line (@$comment) {
7527                         $line = esc_html($line);
7528                         print "$line\n";
7529                 }
7530                 print "</pre><ul>\n";
7531                 foreach my $difftree_line (@difftree) {
7532                         my %difftree = parse_difftree_raw_line($difftree_line);
7533                         next if !$difftree{'from_id'};
7534
7535                         my $file = $difftree{'file'} || $difftree{'to_file'};
7536
7537                         print "<li>" .
7538                               "[" .
7539                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7540                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7541                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7542                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7543                                       -title => "diff"}, 'D');
7544                         if ($have_blame) {
7545                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7546                                                              file_name=>$file, hash_base=>$commit),
7547                                               -title => "blame"}, 'B');
7548                         }
7549                         # if this is not a feed of a file history
7550                         if (!defined $file_name || $file_name ne $file) {
7551                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7552                                                              file_name=>$file, hash=>$commit),
7553                                               -title => "history"}, 'H');
7554                         }
7555                         $file = esc_path($file);
7556                         print "] ".
7557                               "$file</li>\n";
7558                 }
7559                 if ($format eq 'rss') {
7560                         print "</ul>]]>\n" .
7561                               "</content:encoded>\n" .
7562                               "</item>\n";
7563                 } elsif ($format eq 'atom') {
7564                         print "</ul>\n</div>\n" .
7565                               "</content>\n" .
7566                               "</entry>\n";
7567                 }
7568         }
7569
7570         # end of feed
7571         if ($format eq 'rss') {
7572                 print "</channel>\n</rss>\n";
7573         } elsif ($format eq 'atom') {
7574                 print "</feed>\n";
7575         }
7576 }
7577
7578 sub git_rss {
7579         git_feed('rss');
7580 }
7581
7582 sub git_atom {
7583         git_feed('atom');
7584 }
7585
7586 sub git_opml {
7587         my @list = git_get_projects_list();
7588         if (!@list) {
7589                 die_error(404, "No projects found");
7590         }
7591
7592         print $cgi->header(
7593                 -type => 'text/xml',
7594                 -charset => 'utf-8',
7595                 -content_disposition => 'inline; filename="opml.xml"');
7596
7597         print <<XML;
7598 <?xml version="1.0" encoding="utf-8"?>
7599 <opml version="1.0">
7600 <head>
7601   <title>$site_name OPML Export</title>
7602 </head>
7603 <body>
7604 <outline text="git RSS feeds">
7605 XML
7606
7607         foreach my $pr (@list) {
7608                 my %proj = %$pr;
7609                 my $head = git_get_head_hash($proj{'path'});
7610                 if (!defined $head) {
7611                         next;
7612                 }
7613                 $git_dir = "$projectroot/$proj{'path'}";
7614                 my %co = parse_commit($head);
7615                 if (!%co) {
7616                         next;
7617                 }
7618
7619                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7620                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7621                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7622                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7623         }
7624         print <<XML;
7625 </outline>
7626 </body>
7627 </opml>
7628 XML
7629 }