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

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