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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = $cgi->param($symbol);
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $file_name = $input_params{'file_name'};
 999         if (defined $file_name) {
1000                 if (!validate_pathname($file_name)) {
1001                         die_error(400, "Invalid file parameter");
1002                 }
1003         }
1004
1005         our $file_parent = $input_params{'file_parent'};
1006         if (defined $file_parent) {
1007                 if (!validate_pathname($file_parent)) {
1008                         die_error(400, "Invalid file parent parameter");
1009                 }
1010         }
1011
1012         # parameters which are refnames
1013         our $hash = $input_params{'hash'};
1014         if (defined $hash) {
1015                 if (!validate_refname($hash)) {
1016                         die_error(400, "Invalid hash parameter");
1017                 }
1018         }
1019
1020         our $hash_parent = $input_params{'hash_parent'};
1021         if (defined $hash_parent) {
1022                 if (!validate_refname($hash_parent)) {
1023                         die_error(400, "Invalid hash parent parameter");
1024                 }
1025         }
1026
1027         our $hash_base = $input_params{'hash_base'};
1028         if (defined $hash_base) {
1029                 if (!validate_refname($hash_base)) {
1030                         die_error(400, "Invalid hash base parameter");
1031                 }
1032         }
1033
1034         our @extra_options = @{$input_params{'extra_options'}};
1035         # @extra_options is always defined, since it can only be (currently) set from
1036         # CGI, and $cgi->param() returns the empty array in array context if the param
1037         # is not set
1038         foreach my $opt (@extra_options) {
1039                 if (not exists $allowed_options{$opt}) {
1040                         die_error(400, "Invalid option parameter");
1041                 }
1042                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1043                         die_error(400, "Invalid option parameter for this action");
1044                 }
1045         }
1046
1047         our $hash_parent_base = $input_params{'hash_parent_base'};
1048         if (defined $hash_parent_base) {
1049                 if (!validate_refname($hash_parent_base)) {
1050                         die_error(400, "Invalid hash parent base parameter");
1051                 }
1052         }
1053
1054         # other parameters
1055         our $page = $input_params{'page'};
1056         if (defined $page) {
1057                 if ($page =~ m/[^0-9]/) {
1058                         die_error(400, "Invalid page parameter");
1059                 }
1060         }
1061
1062         our $searchtype = $input_params{'searchtype'};
1063         if (defined $searchtype) {
1064                 if ($searchtype =~ m/[^a-z]/) {
1065                         die_error(400, "Invalid searchtype parameter");
1066                 }
1067         }
1068
1069         our $search_use_regexp = $input_params{'search_use_regexp'};
1070
1071         our $searchtext = $input_params{'searchtext'};
1072         our $search_regexp;
1073         if (defined $searchtext) {
1074                 if (length($searchtext) < 2) {
1075                         die_error(403, "At least two characters are required for search parameter");
1076                 }
1077                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1078         }
1079 }
1080
1081 # path to the current git repository
1082 our $git_dir;
1083 sub evaluate_git_dir {
1084         our $git_dir = "$projectroot/$project" if $project;
1085 }
1086
1087 our (@snapshot_fmts, $git_avatar);
1088 sub configure_gitweb_features {
1089         # list of supported snapshot formats
1090         our @snapshot_fmts = gitweb_get_feature('snapshot');
1091         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1092
1093         # check that the avatar feature is set to a known provider name,
1094         # and for each provider check if the dependencies are satisfied.
1095         # if the provider name is invalid or the dependencies are not met,
1096         # reset $git_avatar to the empty string.
1097         our ($git_avatar) = gitweb_get_feature('avatar');
1098         if ($git_avatar eq 'gravatar') {
1099                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1100         } elsif ($git_avatar eq 'picon') {
1101                 # no dependencies
1102         } else {
1103                 $git_avatar = '';
1104         }
1105 }
1106
1107 # custom error handler: 'die <message>' is Internal Server Error
1108 sub handle_errors_html {
1109         my $msg = shift; # it is already HTML escaped
1110
1111         # to avoid infinite loop where error occurs in die_error,
1112         # change handler to default handler, disabling handle_errors_html
1113         set_message("Error occured when inside die_error:\n$msg");
1114
1115         # you cannot jump out of die_error when called as error handler;
1116         # the subroutine set via CGI::Carp::set_message is called _after_
1117         # HTTP headers are already written, so it cannot write them itself
1118         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1119 }
1120 set_message(\&handle_errors_html);
1121
1122 # dispatch
1123 sub dispatch {
1124         if (!defined $action) {
1125                 if (defined $hash) {
1126                         $action = git_get_type($hash);
1127                         $action or die_error(404, "Object does not exist");
1128                 } elsif (defined $hash_base && defined $file_name) {
1129                         $action = git_get_type("$hash_base:$file_name");
1130                         $action or die_error(404, "File or directory does not exist");
1131                 } elsif (defined $project) {
1132                         $action = 'summary';
1133                 } else {
1134                         $action = 'project_list';
1135                 }
1136         }
1137         if (!defined($actions{$action})) {
1138                 die_error(400, "Unknown action");
1139         }
1140         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1141             !$project) {
1142                 die_error(400, "Project needed");
1143         }
1144         $actions{$action}->();
1145 }
1146
1147 sub reset_timer {
1148         our $t0 = [ gettimeofday() ]
1149                 if defined $t0;
1150         our $number_of_git_cmds = 0;
1151 }
1152
1153 our $first_request = 1;
1154 sub run_request {
1155         reset_timer();
1156
1157         evaluate_uri();
1158         if ($first_request) {
1159                 evaluate_gitweb_config();
1160                 evaluate_git_version();
1161         }
1162         if ($per_request_config) {
1163                 if (ref($per_request_config) eq 'CODE') {
1164                         $per_request_config->();
1165                 } elsif (!$first_request) {
1166                         evaluate_gitweb_config();
1167                 }
1168         }
1169         check_loadavg();
1170
1171         # $projectroot and $projects_list might be set in gitweb config file
1172         $projects_list ||= $projectroot;
1173
1174         evaluate_query_params();
1175         evaluate_path_info();
1176         evaluate_and_validate_params();
1177         evaluate_git_dir();
1178
1179         configure_gitweb_features();
1180
1181         dispatch();
1182 }
1183
1184 our $is_last_request = sub { 1 };
1185 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1186 our $CGI = 'CGI';
1187 our $cgi;
1188 sub configure_as_fcgi {
1189         require CGI::Fast;
1190         our $CGI = 'CGI::Fast';
1191
1192         my $request_number = 0;
1193         # let each child service 100 requests
1194         our $is_last_request = sub { ++$request_number > 100 };
1195 }
1196 sub evaluate_argv {
1197         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1198         configure_as_fcgi()
1199                 if $script_name =~ /\.fcgi$/;
1200
1201         return unless (@ARGV);
1202
1203         require Getopt::Long;
1204         Getopt::Long::GetOptions(
1205                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1206                 'nproc|n=i' => sub {
1207                         my ($arg, $val) = @_;
1208                         return unless eval { require FCGI::ProcManager; 1; };
1209                         my $proc_manager = FCGI::ProcManager->new({
1210                                 n_processes => $val,
1211                         });
1212                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1213                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1214                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1215                 },
1216         );
1217 }
1218
1219 sub run {
1220         evaluate_argv();
1221
1222         $first_request = 1;
1223         $pre_listen_hook->()
1224                 if $pre_listen_hook;
1225
1226  REQUEST:
1227         while ($cgi = $CGI->new()) {
1228                 $pre_dispatch_hook->()
1229                         if $pre_dispatch_hook;
1230
1231                 run_request();
1232
1233                 $post_dispatch_hook->()
1234                         if $post_dispatch_hook;
1235                 $first_request = 0;
1236
1237                 last REQUEST if ($is_last_request->());
1238         }
1239
1240  DONE_GITWEB:
1241         1;
1242 }
1243
1244 run();
1245
1246 if (defined caller) {
1247         # wrapped in a subroutine processing requests,
1248         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1249         return;
1250 } else {
1251         # pure CGI script, serving single request
1252         exit;
1253 }
1254
1255 ## ======================================================================
1256 ## action links
1257
1258 # possible values of extra options
1259 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1260 # -replay => 1      - start from a current view (replay with modifications)
1261 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1262 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1263 sub href {
1264         my %params = @_;
1265         # default is to use -absolute url() i.e. $my_uri
1266         my $href = $params{-full} ? $my_url : $my_uri;
1267
1268         # implicit -replay, must be first of implicit params
1269         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1270
1271         $params{'project'} = $project unless exists $params{'project'};
1272
1273         if ($params{-replay}) {
1274                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1275                         if (!exists $params{$name}) {
1276                                 $params{$name} = $input_params{$name};
1277                         }
1278                 }
1279         }
1280
1281         my $use_pathinfo = gitweb_check_feature('pathinfo');
1282         if (defined $params{'project'} &&
1283             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1284                 # try to put as many parameters as possible in PATH_INFO:
1285                 #   - project name
1286                 #   - action
1287                 #   - hash_parent or hash_parent_base:/file_parent
1288                 #   - hash or hash_base:/filename
1289                 #   - the snapshot_format as an appropriate suffix
1290
1291                 # When the script is the root DirectoryIndex for the domain,
1292                 # $href here would be something like http://gitweb.example.com/
1293                 # Thus, we strip any trailing / from $href, to spare us double
1294                 # slashes in the final URL
1295                 $href =~ s,/$,,;
1296
1297                 # Then add the project name, if present
1298                 $href .= "/".esc_path_info($params{'project'});
1299                 delete $params{'project'};
1300
1301                 # since we destructively absorb parameters, we keep this
1302                 # boolean that remembers if we're handling a snapshot
1303                 my $is_snapshot = $params{'action'} eq 'snapshot';
1304
1305                 # Summary just uses the project path URL, any other action is
1306                 # added to the URL
1307                 if (defined $params{'action'}) {
1308                         $href .= "/".esc_path_info($params{'action'})
1309                                 unless $params{'action'} eq 'summary';
1310                         delete $params{'action'};
1311                 }
1312
1313                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1314                 # stripping nonexistent or useless pieces
1315                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1316                         || $params{'hash_parent'} || $params{'hash'});
1317                 if (defined $params{'hash_base'}) {
1318                         if (defined $params{'hash_parent_base'}) {
1319                                 $href .= esc_path_info($params{'hash_parent_base'});
1320                                 # skip the file_parent if it's the same as the file_name
1321                                 if (defined $params{'file_parent'}) {
1322                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1323                                                 delete $params{'file_parent'};
1324                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1325                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1326                                                 delete $params{'file_parent'};
1327                                         }
1328                                 }
1329                                 $href .= "..";
1330                                 delete $params{'hash_parent'};
1331                                 delete $params{'hash_parent_base'};
1332                         } elsif (defined $params{'hash_parent'}) {
1333                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1334                                 delete $params{'hash_parent'};
1335                         }
1336
1337                         $href .= esc_path_info($params{'hash_base'});
1338                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1339                                 $href .= ":/".esc_path_info($params{'file_name'});
1340                                 delete $params{'file_name'};
1341                         }
1342                         delete $params{'hash'};
1343                         delete $params{'hash_base'};
1344                 } elsif (defined $params{'hash'}) {
1345                         $href .= esc_path_info($params{'hash'});
1346                         delete $params{'hash'};
1347                 }
1348
1349                 # If the action was a snapshot, we can absorb the
1350                 # snapshot_format parameter too
1351                 if ($is_snapshot) {
1352                         my $fmt = $params{'snapshot_format'};
1353                         # snapshot_format should always be defined when href()
1354                         # is called, but just in case some code forgets, we
1355                         # fall back to the default
1356                         $fmt ||= $snapshot_fmts[0];
1357                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1358                         delete $params{'snapshot_format'};
1359                 }
1360         }
1361
1362         # now encode the parameters explicitly
1363         my @result = ();
1364         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1365                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1366                 if (defined $params{$name}) {
1367                         if (ref($params{$name}) eq "ARRAY") {
1368                                 foreach my $par (@{$params{$name}}) {
1369                                         push @result, $symbol . "=" . esc_param($par);
1370                                 }
1371                         } else {
1372                                 push @result, $symbol . "=" . esc_param($params{$name});
1373                         }
1374                 }
1375         }
1376         $href .= "?" . join(';', @result) if scalar @result;
1377
1378         # final transformation: trailing spaces must be escaped (URI-encoded)
1379         $href =~ s/(\s+)$/CGI::escape($1)/e;
1380
1381         if ($params{-anchor}) {
1382                 $href .= "#".esc_param($params{-anchor});
1383         }
1384
1385         return $href;
1386 }
1387
1388
1389 ## ======================================================================
1390 ## validation, quoting/unquoting and escaping
1391
1392 sub validate_action {
1393         my $input = shift || return undef;
1394         return undef unless exists $actions{$input};
1395         return $input;
1396 }
1397
1398 sub validate_project {
1399         my $input = shift || return undef;
1400         if (!validate_pathname($input) ||
1401                 !(-d "$projectroot/$input") ||
1402                 !check_export_ok("$projectroot/$input") ||
1403                 ($strict_export && !project_in_list($input))) {
1404                 return undef;
1405         } else {
1406                 return $input;
1407         }
1408 }
1409
1410 sub validate_pathname {
1411         my $input = shift || return undef;
1412
1413         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1414         # at the beginning, at the end, and between slashes.
1415         # also this catches doubled slashes
1416         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1417                 return undef;
1418         }
1419         # no null characters
1420         if ($input =~ m!\0!) {
1421                 return undef;
1422         }
1423         return $input;
1424 }
1425
1426 sub validate_refname {
1427         my $input = shift || return undef;
1428
1429         # textual hashes are O.K.
1430         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1431                 return $input;
1432         }
1433         # it must be correct pathname
1434         $input = validate_pathname($input)
1435                 or return undef;
1436         # restrictions on ref name according to git-check-ref-format
1437         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1438                 return undef;
1439         }
1440         return $input;
1441 }
1442
1443 # decode sequences of octets in utf8 into Perl's internal form,
1444 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1445 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1446 sub to_utf8 {
1447         my $str = shift;
1448         return undef unless defined $str;
1449
1450         if (utf8::is_utf8($str) || utf8::decode($str)) {
1451                 return $str;
1452         } else {
1453                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1454         }
1455 }
1456
1457 # quote unsafe chars, but keep the slash, even when it's not
1458 # correct, but quoted slashes look too horrible in bookmarks
1459 sub esc_param {
1460         my $str = shift;
1461         return undef unless defined $str;
1462         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1463         $str =~ s/ /\+/g;
1464         return $str;
1465 }
1466
1467 # the quoting rules for path_info fragment are slightly different
1468 sub esc_path_info {
1469         my $str = shift;
1470         return undef unless defined $str;
1471
1472         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1473         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1474
1475         return $str;
1476 }
1477
1478 # quote unsafe chars in whole URL, so some characters cannot be quoted
1479 sub esc_url {
1480         my $str = shift;
1481         return undef unless defined $str;
1482         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1483         $str =~ s/ /\+/g;
1484         return $str;
1485 }
1486
1487 # quote unsafe characters in HTML attributes
1488 sub esc_attr {
1489
1490         # for XHTML conformance escaping '"' to '&quot;' is not enough
1491         return esc_html(@_);
1492 }
1493
1494 # replace invalid utf8 character with SUBSTITUTION sequence
1495 sub esc_html {
1496         my $str = shift;
1497         my %opts = @_;
1498
1499         return undef unless defined $str;
1500
1501         $str = to_utf8($str);
1502         $str = $cgi->escapeHTML($str);
1503         if ($opts{'-nbsp'}) {
1504                 $str =~ s/ /&nbsp;/g;
1505         }
1506         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1507         return $str;
1508 }
1509
1510 # quote control characters and escape filename to HTML
1511 sub esc_path {
1512         my $str = shift;
1513         my %opts = @_;
1514
1515         return undef unless defined $str;
1516
1517         $str = to_utf8($str);
1518         $str = $cgi->escapeHTML($str);
1519         if ($opts{'-nbsp'}) {
1520                 $str =~ s/ /&nbsp;/g;
1521         }
1522         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1523         return $str;
1524 }
1525
1526 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1527 sub sanitize {
1528         my $str = shift;
1529
1530         return undef unless defined $str;
1531
1532         $str = to_utf8($str);
1533         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1534         return $str;
1535 }
1536
1537 # Make control characters "printable", using character escape codes (CEC)
1538 sub quot_cec {
1539         my $cntrl = shift;
1540         my %opts = @_;
1541         my %es = ( # character escape codes, aka escape sequences
1542                 "\t" => '\t',   # tab            (HT)
1543                 "\n" => '\n',   # line feed      (LF)
1544                 "\r" => '\r',   # carrige return (CR)
1545                 "\f" => '\f',   # form feed      (FF)
1546                 "\b" => '\b',   # backspace      (BS)
1547                 "\a" => '\a',   # alarm (bell)   (BEL)
1548                 "\e" => '\e',   # escape         (ESC)
1549                 "\013" => '\v', # vertical tab   (VT)
1550                 "\000" => '\0', # nul character  (NUL)
1551         );
1552         my $chr = ( (exists $es{$cntrl})
1553                     ? $es{$cntrl}
1554                     : sprintf('\%2x', ord($cntrl)) );
1555         if ($opts{-nohtml}) {
1556                 return $chr;
1557         } else {
1558                 return "<span class=\"cntrl\">$chr</span>";
1559         }
1560 }
1561
1562 # Alternatively use unicode control pictures codepoints,
1563 # Unicode "printable representation" (PR)
1564 sub quot_upr {
1565         my $cntrl = shift;
1566         my %opts = @_;
1567
1568         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1569         if ($opts{-nohtml}) {
1570                 return $chr;
1571         } else {
1572                 return "<span class=\"cntrl\">$chr</span>";
1573         }
1574 }
1575
1576 # git may return quoted and escaped filenames
1577 sub unquote {
1578         my $str = shift;
1579
1580         sub unq {
1581                 my $seq = shift;
1582                 my %es = ( # character escape codes, aka escape sequences
1583                         't' => "\t",   # tab            (HT, TAB)
1584                         'n' => "\n",   # newline        (NL)
1585                         'r' => "\r",   # return         (CR)
1586                         'f' => "\f",   # form feed      (FF)
1587                         'b' => "\b",   # backspace      (BS)
1588                         'a' => "\a",   # alarm (bell)   (BEL)
1589                         'e' => "\e",   # escape         (ESC)
1590                         'v' => "\013", # vertical tab   (VT)
1591                 );
1592
1593                 if ($seq =~ m/^[0-7]{1,3}$/) {
1594                         # octal char sequence
1595                         return chr(oct($seq));
1596                 } elsif (exists $es{$seq}) {
1597                         # C escape sequence, aka character escape code
1598                         return $es{$seq};
1599                 }
1600                 # quoted ordinary character
1601                 return $seq;
1602         }
1603
1604         if ($str =~ m/^"(.*)"$/) {
1605                 # needs unquoting
1606                 $str = $1;
1607                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1608         }
1609         return $str;
1610 }
1611
1612 # escape tabs (convert tabs to spaces)
1613 sub untabify {
1614         my $line = shift;
1615
1616         while ((my $pos = index($line, "\t")) != -1) {
1617                 if (my $count = (8 - ($pos % 8))) {
1618                         my $spaces = ' ' x $count;
1619                         $line =~ s/\t/$spaces/;
1620                 }
1621         }
1622
1623         return $line;
1624 }
1625
1626 sub project_in_list {
1627         my $project = shift;
1628         my @list = git_get_projects_list();
1629         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1630 }
1631
1632 ## ----------------------------------------------------------------------
1633 ## HTML aware string manipulation
1634
1635 # Try to chop given string on a word boundary between position
1636 # $len and $len+$add_len. If there is no word boundary there,
1637 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1638 # (marking chopped part) would be longer than given string.
1639 sub chop_str {
1640         my $str = shift;
1641         my $len = shift;
1642         my $add_len = shift || 10;
1643         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1644
1645         # Make sure perl knows it is utf8 encoded so we don't
1646         # cut in the middle of a utf8 multibyte char.
1647         $str = to_utf8($str);
1648
1649         # allow only $len chars, but don't cut a word if it would fit in $add_len
1650         # if it doesn't fit, cut it if it's still longer than the dots we would add
1651         # remove chopped character entities entirely
1652
1653         # when chopping in the middle, distribute $len into left and right part
1654         # return early if chopping wouldn't make string shorter
1655         if ($where eq 'center') {
1656                 return $str if ($len + 5 >= length($str)); # filler is length 5
1657                 $len = int($len/2);
1658         } else {
1659                 return $str if ($len + 4 >= length($str)); # filler is length 4
1660         }
1661
1662         # regexps: ending and beginning with word part up to $add_len
1663         my $endre = qr/.{$len}\w{0,$add_len}/;
1664         my $begre = qr/\w{0,$add_len}.{$len}/;
1665
1666         if ($where eq 'left') {
1667                 $str =~ m/^(.*?)($begre)$/;
1668                 my ($lead, $body) = ($1, $2);
1669                 if (length($lead) > 4) {
1670                         $lead = " ...";
1671                 }
1672                 return "$lead$body";
1673
1674         } elsif ($where eq 'center') {
1675                 $str =~ m/^($endre)(.*)$/;
1676                 my ($left, $str)  = ($1, $2);
1677                 $str =~ m/^(.*?)($begre)$/;
1678                 my ($mid, $right) = ($1, $2);
1679                 if (length($mid) > 5) {
1680                         $mid = " ... ";
1681                 }
1682                 return "$left$mid$right";
1683
1684         } else {
1685                 $str =~ m/^($endre)(.*)$/;
1686                 my $body = $1;
1687                 my $tail = $2;
1688                 if (length($tail) > 4) {
1689                         $tail = "... ";
1690                 }
1691                 return "$body$tail";
1692         }
1693 }
1694
1695 # takes the same arguments as chop_str, but also wraps a <span> around the
1696 # result with a title attribute if it does get chopped. Additionally, the
1697 # string is HTML-escaped.
1698 sub chop_and_escape_str {
1699         my ($str) = @_;
1700
1701         my $chopped = chop_str(@_);
1702         $str = to_utf8($str);
1703         if ($chopped eq $str) {
1704                 return esc_html($chopped);
1705         } else {
1706                 $str =~ s/[[:cntrl:]]/?/g;
1707                 return $cgi->span({-title=>$str}, esc_html($chopped));
1708         }
1709 }
1710
1711 ## ----------------------------------------------------------------------
1712 ## functions returning short strings
1713
1714 # CSS class for given age value (in seconds)
1715 sub age_class {
1716         my $age = shift;
1717
1718         if (!defined $age) {
1719                 return "noage";
1720         } elsif ($age < 60*60*2) {
1721                 return "age0";
1722         } elsif ($age < 60*60*24*2) {
1723                 return "age1";
1724         } else {
1725                 return "age2";
1726         }
1727 }
1728
1729 # convert age in seconds to "nn units ago" string
1730 sub age_string {
1731         my $age = shift;
1732         my $age_str;
1733
1734         if ($age > 60*60*24*365*2) {
1735                 $age_str = (int $age/60/60/24/365);
1736                 $age_str .= " years ago";
1737         } elsif ($age > 60*60*24*(365/12)*2) {
1738                 $age_str = int $age/60/60/24/(365/12);
1739                 $age_str .= " months ago";
1740         } elsif ($age > 60*60*24*7*2) {
1741                 $age_str = int $age/60/60/24/7;
1742                 $age_str .= " weeks ago";
1743         } elsif ($age > 60*60*24*2) {
1744                 $age_str = int $age/60/60/24;
1745                 $age_str .= " days ago";
1746         } elsif ($age > 60*60*2) {
1747                 $age_str = int $age/60/60;
1748                 $age_str .= " hours ago";
1749         } elsif ($age > 60*2) {
1750                 $age_str = int $age/60;
1751                 $age_str .= " min ago";
1752         } elsif ($age > 2) {
1753                 $age_str = int $age;
1754                 $age_str .= " sec ago";
1755         } else {
1756                 $age_str .= " right now";
1757         }
1758         return $age_str;
1759 }
1760
1761 use constant {
1762         S_IFINVALID => 0030000,
1763         S_IFGITLINK => 0160000,
1764 };
1765
1766 # submodule/subproject, a commit object reference
1767 sub S_ISGITLINK {
1768         my $mode = shift;
1769
1770         return (($mode & S_IFMT) == S_IFGITLINK)
1771 }
1772
1773 # convert file mode in octal to symbolic file mode string
1774 sub mode_str {
1775         my $mode = oct shift;
1776
1777         if (S_ISGITLINK($mode)) {
1778                 return 'm---------';
1779         } elsif (S_ISDIR($mode & S_IFMT)) {
1780                 return 'drwxr-xr-x';
1781         } elsif (S_ISLNK($mode)) {
1782                 return 'lrwxrwxrwx';
1783         } elsif (S_ISREG($mode)) {
1784                 # git cares only about the executable bit
1785                 if ($mode & S_IXUSR) {
1786                         return '-rwxr-xr-x';
1787                 } else {
1788                         return '-rw-r--r--';
1789                 };
1790         } else {
1791                 return '----------';
1792         }
1793 }
1794
1795 # convert file mode in octal to file type string
1796 sub file_type {
1797         my $mode = shift;
1798
1799         if ($mode !~ m/^[0-7]+$/) {
1800                 return $mode;
1801         } else {
1802                 $mode = oct $mode;
1803         }
1804
1805         if (S_ISGITLINK($mode)) {
1806                 return "submodule";
1807         } elsif (S_ISDIR($mode & S_IFMT)) {
1808                 return "directory";
1809         } elsif (S_ISLNK($mode)) {
1810                 return "symlink";
1811         } elsif (S_ISREG($mode)) {
1812                 return "file";
1813         } else {
1814                 return "unknown";
1815         }
1816 }
1817
1818 # convert file mode in octal to file type description string
1819 sub file_type_long {
1820         my $mode = shift;
1821
1822         if ($mode !~ m/^[0-7]+$/) {
1823                 return $mode;
1824         } else {
1825                 $mode = oct $mode;
1826         }
1827
1828         if (S_ISGITLINK($mode)) {
1829                 return "submodule";
1830         } elsif (S_ISDIR($mode & S_IFMT)) {
1831                 return "directory";
1832         } elsif (S_ISLNK($mode)) {
1833                 return "symlink";
1834         } elsif (S_ISREG($mode)) {
1835                 if ($mode & S_IXUSR) {
1836                         return "executable";
1837                 } else {
1838                         return "file";
1839                 };
1840         } else {
1841                 return "unknown";
1842         }
1843 }
1844
1845
1846 ## ----------------------------------------------------------------------
1847 ## functions returning short HTML fragments, or transforming HTML fragments
1848 ## which don't belong to other sections
1849
1850 # format line of commit message.
1851 sub format_log_line_html {
1852         my $line = shift;
1853
1854         $line = esc_html($line, -nbsp=>1);
1855         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1856                 $cgi->a({-href => href(action=>"object", hash=>$1),
1857                                         -class => "text"}, $1);
1858         }eg;
1859
1860         return $line;
1861 }
1862
1863 # format marker of refs pointing to given object
1864
1865 # the destination action is chosen based on object type and current context:
1866 # - for annotated tags, we choose the tag view unless it's the current view
1867 #   already, in which case we go to shortlog view
1868 # - for other refs, we keep the current view if we're in history, shortlog or
1869 #   log view, and select shortlog otherwise
1870 sub format_ref_marker {
1871         my ($refs, $id) = @_;
1872         my $markers = '';
1873
1874         if (defined $refs->{$id}) {
1875                 foreach my $ref (@{$refs->{$id}}) {
1876                         # this code exploits the fact that non-lightweight tags are the
1877                         # only indirect objects, and that they are the only objects for which
1878                         # we want to use tag instead of shortlog as action
1879                         my ($type, $name) = qw();
1880                         my $indirect = ($ref =~ s/\^\{\}$//);
1881                         # e.g. tags/v2.6.11 or heads/next
1882                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1883                                 $type = $1;
1884                                 $name = $2;
1885                         } else {
1886                                 $type = "ref";
1887                                 $name = $ref;
1888                         }
1889
1890                         my $class = $type;
1891                         $class .= " indirect" if $indirect;
1892
1893                         my $dest_action = "shortlog";
1894
1895                         if ($indirect) {
1896                                 $dest_action = "tag" unless $action eq "tag";
1897                         } elsif ($action =~ /^(history|(short)?log)$/) {
1898                                 $dest_action = $action;
1899                         }
1900
1901                         my $dest = "";
1902                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1903                         $dest .= $ref;
1904
1905                         my $link = $cgi->a({
1906                                 -href => href(
1907                                         action=>$dest_action,
1908                                         hash=>$dest
1909                                 )}, $name);
1910
1911                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1912                                 $link . "</span>";
1913                 }
1914         }
1915
1916         if ($markers) {
1917                 return ' <span class="refs">'. $markers . '</span>';
1918         } else {
1919                 return "";
1920         }
1921 }
1922
1923 # format, perhaps shortened and with markers, title line
1924 sub format_subject_html {
1925         my ($long, $short, $href, $extra) = @_;
1926         $extra = '' unless defined($extra);
1927
1928         if (length($short) < length($long)) {
1929                 $long =~ s/[[:cntrl:]]/?/g;
1930                 return $cgi->a({-href => $href, -class => "list subject",
1931                                 -title => to_utf8($long)},
1932                        esc_html($short)) . $extra;
1933         } else {
1934                 return $cgi->a({-href => $href, -class => "list subject"},
1935                        esc_html($long)) . $extra;
1936         }
1937 }
1938
1939 # Rather than recomputing the url for an email multiple times, we cache it
1940 # after the first hit. This gives a visible benefit in views where the avatar
1941 # for the same email is used repeatedly (e.g. shortlog).
1942 # The cache is shared by all avatar engines (currently gravatar only), which
1943 # are free to use it as preferred. Since only one avatar engine is used for any
1944 # given page, there's no risk for cache conflicts.
1945 our %avatar_cache = ();
1946
1947 # Compute the picon url for a given email, by using the picon search service over at
1948 # http://www.cs.indiana.edu/picons/search.html
1949 sub picon_url {
1950         my $email = lc shift;
1951         if (!$avatar_cache{$email}) {
1952                 my ($user, $domain) = split('@', $email);
1953                 $avatar_cache{$email} =
1954                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1955                         "$domain/$user/" .
1956                         "users+domains+unknown/up/single";
1957         }
1958         return $avatar_cache{$email};
1959 }
1960
1961 # Compute the gravatar url for a given email, if it's not in the cache already.
1962 # Gravatar stores only the part of the URL before the size, since that's the
1963 # one computationally more expensive. This also allows reuse of the cache for
1964 # different sizes (for this particular engine).
1965 sub gravatar_url {
1966         my $email = lc shift;
1967         my $size = shift;
1968         $avatar_cache{$email} ||=
1969                 "http://www.gravatar.com/avatar/" .
1970                         Digest::MD5::md5_hex($email) . "?s=";
1971         return $avatar_cache{$email} . $size;
1972 }
1973
1974 # Insert an avatar for the given $email at the given $size if the feature
1975 # is enabled.
1976 sub git_get_avatar {
1977         my ($email, %opts) = @_;
1978         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1979         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1980         $opts{-size} ||= 'default';
1981         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1982         my $url = "";
1983         if ($git_avatar eq 'gravatar') {
1984                 $url = gravatar_url($email, $size);
1985         } elsif ($git_avatar eq 'picon') {
1986                 $url = picon_url($email);
1987         }
1988         # Other providers can be added by extending the if chain, defining $url
1989         # as needed. If no variant puts something in $url, we assume avatars
1990         # are completely disabled/unavailable.
1991         if ($url) {
1992                 return $pre_white .
1993                        "<img width=\"$size\" " .
1994                             "class=\"avatar\" " .
1995                             "src=\"".esc_url($url)."\" " .
1996                             "alt=\"\" " .
1997                        "/>" . $post_white;
1998         } else {
1999                 return "";
2000         }
2001 }
2002
2003 sub format_search_author {
2004         my ($author, $searchtype, $displaytext) = @_;
2005         my $have_search = gitweb_check_feature('search');
2006
2007         if ($have_search) {
2008                 my $performed = "";
2009                 if ($searchtype eq 'author') {
2010                         $performed = "authored";
2011                 } elsif ($searchtype eq 'committer') {
2012                         $performed = "committed";
2013                 }
2014
2015                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2016                                 searchtext=>$author,
2017                                 searchtype=>$searchtype), class=>"list",
2018                                 title=>"Search for commits $performed by $author"},
2019                                 $displaytext);
2020
2021         } else {
2022                 return $displaytext;
2023         }
2024 }
2025
2026 # format the author name of the given commit with the given tag
2027 # the author name is chopped and escaped according to the other
2028 # optional parameters (see chop_str).
2029 sub format_author_html {
2030         my $tag = shift;
2031         my $co = shift;
2032         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2033         return "<$tag class=\"author\">" .
2034                format_search_author($co->{'author_name'}, "author",
2035                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2036                        $author) .
2037                "</$tag>";
2038 }
2039
2040 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2041 sub format_git_diff_header_line {
2042         my $line = shift;
2043         my $diffinfo = shift;
2044         my ($from, $to) = @_;
2045
2046         if ($diffinfo->{'nparents'}) {
2047                 # combined diff
2048                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2049                 if ($to->{'href'}) {
2050                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2051                                          esc_path($to->{'file'}));
2052                 } else { # file was deleted (no href)
2053                         $line .= esc_path($to->{'file'});
2054                 }
2055         } else {
2056                 # "ordinary" diff
2057                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2058                 if ($from->{'href'}) {
2059                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2060                                          'a/' . esc_path($from->{'file'}));
2061                 } else { # file was added (no href)
2062                         $line .= 'a/' . esc_path($from->{'file'});
2063                 }
2064                 $line .= ' ';
2065                 if ($to->{'href'}) {
2066                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2067                                          'b/' . esc_path($to->{'file'}));
2068                 } else { # file was deleted
2069                         $line .= 'b/' . esc_path($to->{'file'});
2070                 }
2071         }
2072
2073         return "<div class=\"diff header\">$line</div>\n";
2074 }
2075
2076 # format extended diff header line, before patch itself
2077 sub format_extended_diff_header_line {
2078         my $line = shift;
2079         my $diffinfo = shift;
2080         my ($from, $to) = @_;
2081
2082         # match <path>
2083         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2084                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2085                                        esc_path($from->{'file'}));
2086         }
2087         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2088                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2089                                  esc_path($to->{'file'}));
2090         }
2091         # match single <mode>
2092         if ($line =~ m/\s(\d{6})$/) {
2093                 $line .= '<span class="info"> (' .
2094                          file_type_long($1) .
2095                          ')</span>';
2096         }
2097         # match <hash>
2098         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2099                 # can match only for combined diff
2100                 $line = 'index ';
2101                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2102                         if ($from->{'href'}[$i]) {
2103                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2104                                                   -class=>"hash"},
2105                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2106                         } else {
2107                                 $line .= '0' x 7;
2108                         }
2109                         # separator
2110                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2111                 }
2112                 $line .= '..';
2113                 if ($to->{'href'}) {
2114                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2115                                          substr($diffinfo->{'to_id'},0,7));
2116                 } else {
2117                         $line .= '0' x 7;
2118                 }
2119
2120         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2121                 # can match only for ordinary diff
2122                 my ($from_link, $to_link);
2123                 if ($from->{'href'}) {
2124                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2125                                              substr($diffinfo->{'from_id'},0,7));
2126                 } else {
2127                         $from_link = '0' x 7;
2128                 }
2129                 if ($to->{'href'}) {
2130                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2131                                            substr($diffinfo->{'to_id'},0,7));
2132                 } else {
2133                         $to_link = '0' x 7;
2134                 }
2135                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2136                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2137         }
2138
2139         return $line . "<br/>\n";
2140 }
2141
2142 # format from-file/to-file diff header
2143 sub format_diff_from_to_header {
2144         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2145         my $line;
2146         my $result = '';
2147
2148         $line = $from_line;
2149         #assert($line =~ m/^---/) if DEBUG;
2150         # no extra formatting for "^--- /dev/null"
2151         if (! $diffinfo->{'nparents'}) {
2152                 # ordinary (single parent) diff
2153                 if ($line =~ m!^--- "?a/!) {
2154                         if ($from->{'href'}) {
2155                                 $line = '--- a/' .
2156                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2157                                                 esc_path($from->{'file'}));
2158                         } else {
2159                                 $line = '--- a/' .
2160                                         esc_path($from->{'file'});
2161                         }
2162                 }
2163                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2164
2165         } else {
2166                 # combined diff (merge commit)
2167                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2168                         if ($from->{'href'}[$i]) {
2169                                 $line = '--- ' .
2170                                         $cgi->a({-href=>href(action=>"blobdiff",
2171                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2172                                                              hash_parent_base=>$parents[$i],
2173                                                              file_parent=>$from->{'file'}[$i],
2174                                                              hash=>$diffinfo->{'to_id'},
2175                                                              hash_base=>$hash,
2176                                                              file_name=>$to->{'file'}),
2177                                                  -class=>"path",
2178                                                  -title=>"diff" . ($i+1)},
2179                                                 $i+1) .
2180                                         '/' .
2181                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2182                                                 esc_path($from->{'file'}[$i]));
2183                         } else {
2184                                 $line = '--- /dev/null';
2185                         }
2186                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2187                 }
2188         }
2189
2190         $line = $to_line;
2191         #assert($line =~ m/^\+\+\+/) if DEBUG;
2192         # no extra formatting for "^+++ /dev/null"
2193         if ($line =~ m!^\+\+\+ "?b/!) {
2194                 if ($to->{'href'}) {
2195                         $line = '+++ b/' .
2196                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2197                                         esc_path($to->{'file'}));
2198                 } else {
2199                         $line = '+++ b/' .
2200                                 esc_path($to->{'file'});
2201                 }
2202         }
2203         $result .= qq!<div class="diff to_file">$line</div>\n!;
2204
2205         return $result;
2206 }
2207
2208 # create note for patch simplified by combined diff
2209 sub format_diff_cc_simplified {
2210         my ($diffinfo, @parents) = @_;
2211         my $result = '';
2212
2213         $result .= "<div class=\"diff header\">" .
2214                    "diff --cc ";
2215         if (!is_deleted($diffinfo)) {
2216                 $result .= $cgi->a({-href => href(action=>"blob",
2217                                                   hash_base=>$hash,
2218                                                   hash=>$diffinfo->{'to_id'},
2219                                                   file_name=>$diffinfo->{'to_file'}),
2220                                     -class => "path"},
2221                                    esc_path($diffinfo->{'to_file'}));
2222         } else {
2223                 $result .= esc_path($diffinfo->{'to_file'});
2224         }
2225         $result .= "</div>\n" . # class="diff header"
2226                    "<div class=\"diff nodifferences\">" .
2227                    "Simple merge" .
2228                    "</div>\n"; # class="diff nodifferences"
2229
2230         return $result;
2231 }
2232
2233 sub diff_line_class {
2234         my ($line, $from, $to) = @_;
2235
2236         # ordinary diff
2237         my $num_sign = 1;
2238         # combined diff
2239         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2240                 $num_sign = scalar @{$from->{'href'}};
2241         }
2242
2243         my @diff_line_classifier = (
2244                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2245                 { regexp => qr/^\\/,               class => "incomplete"  },
2246                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2247                 # classifier for context must come before classifier add/rem,
2248                 # or we would have to use more complicated regexp, for example
2249                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2250                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2251                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2252         );
2253         for my $clsfy (@diff_line_classifier) {
2254                 return $clsfy->{'class'}
2255                         if ($line =~ $clsfy->{'regexp'});
2256         }
2257
2258         # fallback
2259         return "";
2260 }
2261
2262 # assumes that $from and $to are defined and correctly filled,
2263 # and that $line holds a line of chunk header for unified diff
2264 sub format_unidiff_chunk_header {
2265         my ($line, $from, $to) = @_;
2266
2267         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2268                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2269
2270         $from_lines = 0 unless defined $from_lines;
2271         $to_lines   = 0 unless defined $to_lines;
2272
2273         if ($from->{'href'}) {
2274                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2275                                      -class=>"list"}, $from_text);
2276         }
2277         if ($to->{'href'}) {
2278                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2279                                      -class=>"list"}, $to_text);
2280         }
2281         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2282                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2283         return $line;
2284 }
2285
2286 # assumes that $from and $to are defined and correctly filled,
2287 # and that $line holds a line of chunk header for combined diff
2288 sub format_cc_diff_chunk_header {
2289         my ($line, $from, $to) = @_;
2290
2291         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2292         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2293
2294         @from_text = split(' ', $ranges);
2295         for (my $i = 0; $i < @from_text; ++$i) {
2296                 ($from_start[$i], $from_nlines[$i]) =
2297                         (split(',', substr($from_text[$i], 1)), 0);
2298         }
2299
2300         $to_text   = pop @from_text;
2301         $to_start  = pop @from_start;
2302         $to_nlines = pop @from_nlines;
2303
2304         $line = "<span class=\"chunk_info\">$prefix ";
2305         for (my $i = 0; $i < @from_text; ++$i) {
2306                 if ($from->{'href'}[$i]) {
2307                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2308                                           -class=>"list"}, $from_text[$i]);
2309                 } else {
2310                         $line .= $from_text[$i];
2311                 }
2312                 $line .= " ";
2313         }
2314         if ($to->{'href'}) {
2315                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2316                                   -class=>"list"}, $to_text);
2317         } else {
2318                 $line .= $to_text;
2319         }
2320         $line .= " $prefix</span>" .
2321                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2322         return $line;
2323 }
2324
2325 # process patch (diff) line (not to be used for diff headers),
2326 # returning class and HTML-formatted (but not wrapped) line
2327 sub process_diff_line {
2328         my $line = shift;
2329         my ($from, $to) = @_;
2330
2331         my $diff_class = diff_line_class($line, $from, $to);
2332
2333         chomp $line;
2334         $line = untabify($line);
2335
2336         if ($from && $to && $line =~ m/^\@{2} /) {
2337                 $line = format_unidiff_chunk_header($line, $from, $to);
2338                 return $diff_class, $line;
2339
2340         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2341                 $line = format_cc_diff_chunk_header($line, $from, $to);
2342                 return $diff_class, $line;
2343
2344         }
2345         return $diff_class, esc_html($line, -nbsp=>1);
2346 }
2347
2348 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2349 # linked.  Pass the hash of the tree/commit to snapshot.
2350 sub format_snapshot_links {
2351         my ($hash) = @_;
2352         my $num_fmts = @snapshot_fmts;
2353         if ($num_fmts > 1) {
2354                 # A parenthesized list of links bearing format names.
2355                 # e.g. "snapshot (_tar.gz_ _zip_)"
2356                 return "snapshot (" . join(' ', map
2357                         $cgi->a({
2358                                 -href => href(
2359                                         action=>"snapshot",
2360                                         hash=>$hash,
2361                                         snapshot_format=>$_
2362                                 )
2363                         }, $known_snapshot_formats{$_}{'display'})
2364                 , @snapshot_fmts) . ")";
2365         } elsif ($num_fmts == 1) {
2366                 # A single "snapshot" link whose tooltip bears the format name.
2367                 # i.e. "_snapshot_"
2368                 my ($fmt) = @snapshot_fmts;
2369                 return
2370                         $cgi->a({
2371                                 -href => href(
2372                                         action=>"snapshot",
2373                                         hash=>$hash,
2374                                         snapshot_format=>$fmt
2375                                 ),
2376                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2377                         }, "snapshot");
2378         } else { # $num_fmts == 0
2379                 return undef;
2380         }
2381 }
2382
2383 ## ......................................................................
2384 ## functions returning values to be passed, perhaps after some
2385 ## transformation, to other functions; e.g. returning arguments to href()
2386
2387 # returns hash to be passed to href to generate gitweb URL
2388 # in -title key it returns description of link
2389 sub get_feed_info {
2390         my $format = shift || 'Atom';
2391         my %res = (action => lc($format));
2392
2393         # feed links are possible only for project views
2394         return unless (defined $project);
2395         # some views should link to OPML, or to generic project feed,
2396         # or don't have specific feed yet (so they should use generic)
2397         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2398
2399         my $branch;
2400         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2401         # from tag links; this also makes possible to detect branch links
2402         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2403             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2404                 $branch = $1;
2405         }
2406         # find log type for feed description (title)
2407         my $type = 'log';
2408         if (defined $file_name) {
2409                 $type  = "history of $file_name";
2410                 $type .= "/" if ($action eq 'tree');
2411                 $type .= " on '$branch'" if (defined $branch);
2412         } else {
2413                 $type = "log of $branch" if (defined $branch);
2414         }
2415
2416         $res{-title} = $type;
2417         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2418         $res{'file_name'} = $file_name;
2419
2420         return %res;
2421 }
2422
2423 ## ----------------------------------------------------------------------
2424 ## git utility subroutines, invoking git commands
2425
2426 # returns path to the core git executable and the --git-dir parameter as list
2427 sub git_cmd {
2428         $number_of_git_cmds++;
2429         return $GIT, '--git-dir='.$git_dir;
2430 }
2431
2432 # quote the given arguments for passing them to the shell
2433 # quote_command("command", "arg 1", "arg with ' and ! characters")
2434 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2435 # Try to avoid using this function wherever possible.
2436 sub quote_command {
2437         return join(' ',
2438                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2439 }
2440
2441 # get HEAD ref of given project as hash
2442 sub git_get_head_hash {
2443         return git_get_full_hash(shift, 'HEAD');
2444 }
2445
2446 sub git_get_full_hash {
2447         return git_get_hash(@_);
2448 }
2449
2450 sub git_get_short_hash {
2451         return git_get_hash(@_, '--short=7');
2452 }
2453
2454 sub git_get_hash {
2455         my ($project, $hash, @options) = @_;
2456         my $o_git_dir = $git_dir;
2457         my $retval = undef;
2458         $git_dir = "$projectroot/$project";
2459         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2460             '--verify', '-q', @options, $hash) {
2461                 $retval = <$fd>;
2462                 chomp $retval if defined $retval;
2463                 close $fd;
2464         }
2465         if (defined $o_git_dir) {
2466                 $git_dir = $o_git_dir;
2467         }
2468         return $retval;
2469 }
2470
2471 # get type of given object
2472 sub git_get_type {
2473         my $hash = shift;
2474
2475         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2476         my $type = <$fd>;
2477         close $fd or return;
2478         chomp $type;
2479         return $type;
2480 }
2481
2482 # repository configuration
2483 our $config_file = '';
2484 our %config;
2485
2486 # store multiple values for single key as anonymous array reference
2487 # single values stored directly in the hash, not as [ <value> ]
2488 sub hash_set_multi {
2489         my ($hash, $key, $value) = @_;
2490
2491         if (!exists $hash->{$key}) {
2492                 $hash->{$key} = $value;
2493         } elsif (!ref $hash->{$key}) {
2494                 $hash->{$key} = [ $hash->{$key}, $value ];
2495         } else {
2496                 push @{$hash->{$key}}, $value;
2497         }
2498 }
2499
2500 # return hash of git project configuration
2501 # optionally limited to some section, e.g. 'gitweb'
2502 sub git_parse_project_config {
2503         my $section_regexp = shift;
2504         my %config;
2505
2506         local $/ = "\0";
2507
2508         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2509                 or return;
2510
2511         while (my $keyval = <$fh>) {
2512                 chomp $keyval;
2513                 my ($key, $value) = split(/\n/, $keyval, 2);
2514
2515                 hash_set_multi(\%config, $key, $value)
2516                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2517         }
2518         close $fh;
2519
2520         return %config;
2521 }
2522
2523 # convert config value to boolean: 'true' or 'false'
2524 # no value, number > 0, 'true' and 'yes' values are true
2525 # rest of values are treated as false (never as error)
2526 sub config_to_bool {
2527         my $val = shift;
2528
2529         return 1 if !defined $val;             # section.key
2530
2531         # strip leading and trailing whitespace
2532         $val =~ s/^\s+//;
2533         $val =~ s/\s+$//;
2534
2535         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2536                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2537 }
2538
2539 # convert config value to simple decimal number
2540 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2541 # to be multiplied by 1024, 1048576, or 1073741824
2542 sub config_to_int {
2543         my $val = shift;
2544
2545         # strip leading and trailing whitespace
2546         $val =~ s/^\s+//;
2547         $val =~ s/\s+$//;
2548
2549         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2550                 $unit = lc($unit);
2551                 # unknown unit is treated as 1
2552                 return $num * ($unit eq 'g' ? 1073741824 :
2553                                $unit eq 'm' ?    1048576 :
2554                                $unit eq 'k' ?       1024 : 1);
2555         }
2556         return $val;
2557 }
2558
2559 # convert config value to array reference, if needed
2560 sub config_to_multi {
2561         my $val = shift;
2562
2563         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2564 }
2565
2566 sub git_get_project_config {
2567         my ($key, $type) = @_;
2568
2569         return unless defined $git_dir;
2570
2571         # key sanity check
2572         return unless ($key);
2573         # only subsection, if exists, is case sensitive,
2574         # and not lowercased by 'git config -z -l'
2575         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2576                 $key = join(".", lc($hi), $mi, lc($lo));
2577         } else {
2578                 $key = lc($key);
2579         }
2580         $key =~ s/^gitweb\.//;
2581         return if ($key =~ m/\W/);
2582
2583         # type sanity check
2584         if (defined $type) {
2585                 $type =~ s/^--//;
2586                 $type = undef
2587                         unless ($type eq 'bool' || $type eq 'int');
2588         }
2589
2590         # get config
2591         if (!defined $config_file ||
2592             $config_file ne "$git_dir/config") {
2593                 %config = git_parse_project_config('gitweb');
2594                 $config_file = "$git_dir/config";
2595         }
2596
2597         # check if config variable (key) exists
2598         return unless exists $config{"gitweb.$key"};
2599
2600         # ensure given type
2601         if (!defined $type) {
2602                 return $config{"gitweb.$key"};
2603         } elsif ($type eq 'bool') {
2604                 # backward compatibility: 'git config --bool' returns true/false
2605                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2606         } elsif ($type eq 'int') {
2607                 return config_to_int($config{"gitweb.$key"});
2608         }
2609         return $config{"gitweb.$key"};
2610 }
2611
2612 # get hash of given path at given ref
2613 sub git_get_hash_by_path {
2614         my $base = shift;
2615         my $path = shift || return undef;
2616         my $type = shift;
2617
2618         $path =~ s,/+$,,;
2619
2620         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2621                 or die_error(500, "Open git-ls-tree failed");
2622         my $line = <$fd>;
2623         close $fd or return undef;
2624
2625         if (!defined $line) {
2626                 # there is no tree or hash given by $path at $base
2627                 return undef;
2628         }
2629
2630         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2631         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2632         if (defined $type && $type ne $2) {
2633                 # type doesn't match
2634                 return undef;
2635         }
2636         return $3;
2637 }
2638
2639 # get path of entry with given hash at given tree-ish (ref)
2640 # used to get 'from' filename for combined diff (merge commit) for renames
2641 sub git_get_path_by_hash {
2642         my $base = shift || return;
2643         my $hash = shift || return;
2644
2645         local $/ = "\0";
2646
2647         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2648                 or return undef;
2649         while (my $line = <$fd>) {
2650                 chomp $line;
2651
2652                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2653                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2654                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2655                         close $fd;
2656                         return $1;
2657                 }
2658         }
2659         close $fd;
2660         return undef;
2661 }
2662
2663 ## ......................................................................
2664 ## git utility functions, directly accessing git repository
2665
2666 # get the value of config variable either from file named as the variable
2667 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2668 # configuration variable in the repository config file.
2669 sub git_get_file_or_project_config {
2670         my ($path, $name) = @_;
2671
2672         $git_dir = "$projectroot/$path";
2673         open my $fd, '<', "$git_dir/$name"
2674                 or return git_get_project_config($name);
2675         my $conf = <$fd>;
2676         close $fd;
2677         if (defined $conf) {
2678                 chomp $conf;
2679         }
2680         return $conf;
2681 }
2682
2683 sub git_get_project_description {
2684         my $path = shift;
2685         return git_get_file_or_project_config($path, 'description');
2686 }
2687
2688 sub git_get_project_category {
2689         my $path = shift;
2690         return git_get_file_or_project_config($path, 'category');
2691 }
2692
2693
2694 # supported formats:
2695 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2696 #   - if its contents is a number, use it as tag weight,
2697 #   - otherwise add a tag with weight 1
2698 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2699 #   the same value multiple times increases tag weight
2700 # * `gitweb.ctag' multi-valued repo config variable
2701 sub git_get_project_ctags {
2702         my $project = shift;
2703         my $ctags = {};
2704
2705         $git_dir = "$projectroot/$project";
2706         if (opendir my $dh, "$git_dir/ctags") {
2707                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2708                 foreach my $tagfile (@files) {
2709                         open my $ct, '<', $tagfile
2710                                 or next;
2711                         my $val = <$ct>;
2712                         chomp $val if $val;
2713                         close $ct;
2714
2715                         (my $ctag = $tagfile) =~ s#.*/##;
2716                         if ($val =~ /^\d+$/) {
2717                                 $ctags->{$ctag} = $val;
2718                         } else {
2719                                 $ctags->{$ctag} = 1;
2720                         }
2721                 }
2722                 closedir $dh;
2723
2724         } elsif (open my $fh, '<', "$git_dir/ctags") {
2725                 while (my $line = <$fh>) {
2726                         chomp $line;
2727                         $ctags->{$line}++ if $line;
2728                 }
2729                 close $fh;
2730
2731         } else {
2732                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2733                 foreach my $tag (@$taglist) {
2734                         $ctags->{$tag}++;
2735                 }
2736         }
2737
2738         return $ctags;
2739 }
2740
2741 # return hash, where keys are content tags ('ctags'),
2742 # and values are sum of weights of given tag in every project
2743 sub git_gather_all_ctags {
2744         my $projects = shift;
2745         my $ctags = {};
2746
2747         foreach my $p (@$projects) {
2748                 foreach my $ct (keys %{$p->{'ctags'}}) {
2749                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2750                 }
2751         }
2752
2753         return $ctags;
2754 }
2755
2756 sub git_populate_project_tagcloud {
2757         my $ctags = shift;
2758
2759         # First, merge different-cased tags; tags vote on casing
2760         my %ctags_lc;
2761         foreach (keys %$ctags) {
2762                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2763                 if (not $ctags_lc{lc $_}->{topcount}
2764                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2765                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2766                         $ctags_lc{lc $_}->{topname} = $_;
2767                 }
2768         }
2769
2770         my $cloud;
2771         my $matched = $cgi->param('by_tag');
2772         if (eval { require HTML::TagCloud; 1; }) {
2773                 $cloud = HTML::TagCloud->new;
2774                 foreach my $ctag (sort keys %ctags_lc) {
2775                         # Pad the title with spaces so that the cloud looks
2776                         # less crammed.
2777                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2778                         $title =~ s/ /&nbsp;/g;
2779                         $title =~ s/^/&nbsp;/g;
2780                         $title =~ s/$/&nbsp;/g;
2781                         if (defined $matched && $matched eq $ctag) {
2782                                 $title = qq(<span class="match">$title</span>);
2783                         }
2784                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2785                                     $ctags_lc{$ctag}->{count});
2786                 }
2787         } else {
2788                 $cloud = {};
2789                 foreach my $ctag (keys %ctags_lc) {
2790                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2791                         if (defined $matched && $matched eq $ctag) {
2792                                 $title = qq(<span class="match">$title</span>);
2793                         }
2794                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2795                         $cloud->{$ctag}{ctag} =
2796                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2797                 }
2798         }
2799         return $cloud;
2800 }
2801
2802 sub git_show_project_tagcloud {
2803         my ($cloud, $count) = @_;
2804         if (ref $cloud eq 'HTML::TagCloud') {
2805                 return $cloud->html_and_css($count);
2806         } else {
2807                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2808                 return
2809                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2810                         join (', ', map {
2811                                 $cloud->{$_}->{'ctag'}
2812                         } splice(@tags, 0, $count)) .
2813                         '</div>';
2814         }
2815 }
2816
2817 sub git_get_project_url_list {
2818         my $path = shift;
2819
2820         $git_dir = "$projectroot/$path";
2821         open my $fd, '<', "$git_dir/cloneurl"
2822                 or return wantarray ?
2823                 @{ config_to_multi(git_get_project_config('url')) } :
2824                    config_to_multi(git_get_project_config('url'));
2825         my @git_project_url_list = map { chomp; $_ } <$fd>;
2826         close $fd;
2827
2828         return wantarray ? @git_project_url_list : \@git_project_url_list;
2829 }
2830
2831 sub git_get_projects_list {
2832         my $filter = shift || '';
2833         my @list;
2834
2835         $filter =~ s/\.git$//;
2836
2837         if (-d $projects_list) {
2838                 # search in directory
2839                 my $dir = $projects_list;
2840                 # remove the trailing "/"
2841                 $dir =~ s!/+$!!;
2842                 my $pfxlen = length("$dir");
2843                 my $pfxdepth = ($dir =~ tr!/!!);
2844                 # when filtering, search only given subdirectory
2845                 if ($filter) {
2846                         $dir .= "/$filter";
2847                         $dir =~ s!/+$!!;
2848                 }
2849
2850                 File::Find::find({
2851                         follow_fast => 1, # follow symbolic links
2852                         follow_skip => 2, # ignore duplicates
2853                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2854                         wanted => sub {
2855                                 # global variables
2856                                 our $project_maxdepth;
2857                                 our $projectroot;
2858                                 # skip project-list toplevel, if we get it.
2859                                 return if (m!^[/.]$!);
2860                                 # only directories can be git repositories
2861                                 return unless (-d $_);
2862                                 # don't traverse too deep (Find is super slow on os x)
2863                                 # $project_maxdepth excludes depth of $projectroot
2864                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2865                                         $File::Find::prune = 1;
2866                                         return;
2867                                 }
2868
2869                                 my $path = substr($File::Find::name, $pfxlen + 1);
2870                                 # we check related file in $projectroot
2871                                 if (check_export_ok("$projectroot/$path")) {
2872                                         push @list, { path => $path };
2873                                         $File::Find::prune = 1;
2874                                 }
2875                         },
2876                 }, "$dir");
2877
2878         } elsif (-f $projects_list) {
2879                 # read from file(url-encoded):
2880                 # 'git%2Fgit.git Linus+Torvalds'
2881                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2882                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2883                 open my $fd, '<', $projects_list or return;
2884         PROJECT:
2885                 while (my $line = <$fd>) {
2886                         chomp $line;
2887                         my ($path, $owner) = split ' ', $line;
2888                         $path = unescape($path);
2889                         $owner = unescape($owner);
2890                         if (!defined $path) {
2891                                 next;
2892                         }
2893                         # if $filter is rpovided, check if $path begins with $filter
2894                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2895                                 next;
2896                         }
2897                         if (check_export_ok("$projectroot/$path")) {
2898                                 my $pr = {
2899                                         path => $path,
2900                                         owner => to_utf8($owner),
2901                                 };
2902                                 push @list, $pr;
2903                         }
2904                 }
2905                 close $fd;
2906         }
2907         return @list;
2908 }
2909
2910 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2911 # as side effects it sets 'forks' field to list of forks for forked projects
2912 sub filter_forks_from_projects_list {
2913         my $projects = shift;
2914
2915         my %trie; # prefix tree of directories (path components)
2916         # generate trie out of those directories that might contain forks
2917         foreach my $pr (@$projects) {
2918                 my $path = $pr->{'path'};
2919                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2920                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2921                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2922                 next unless (-d "$projectroot/$path"); # containing directory exists
2923                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2924
2925                 # add to trie
2926                 my @dirs = split('/', $path);
2927                 # walk the trie, until either runs out of components or out of trie
2928                 my $ref = \%trie;
2929                 while (scalar @dirs &&
2930                        exists($ref->{$dirs[0]})) {
2931                         $ref = $ref->{shift @dirs};
2932                 }
2933                 # create rest of trie structure from rest of components
2934                 foreach my $dir (@dirs) {
2935                         $ref = $ref->{$dir} = {};
2936                 }
2937                 # create end marker, store $pr as a data
2938                 $ref->{''} = $pr if (!exists $ref->{''});
2939         }
2940
2941         # filter out forks, by finding shortest prefix match for paths
2942         my @filtered;
2943  PROJECT:
2944         foreach my $pr (@$projects) {
2945                 # trie lookup
2946                 my $ref = \%trie;
2947         DIR:
2948                 foreach my $dir (split('/', $pr->{'path'})) {
2949                         if (exists $ref->{''}) {
2950                                 # found [shortest] prefix, is a fork - skip it
2951                                 push @{$ref->{''}{'forks'}}, $pr;
2952                                 next PROJECT;
2953                         }
2954                         if (!exists $ref->{$dir}) {
2955                                 # not in trie, cannot have prefix, not a fork
2956                                 push @filtered, $pr;
2957                                 next PROJECT;
2958                         }
2959                         # If the dir is there, we just walk one step down the trie.
2960                         $ref = $ref->{$dir};
2961                 }
2962                 # we ran out of trie
2963                 # (shouldn't happen: it's either no match, or end marker)
2964                 push @filtered, $pr;
2965         }
2966
2967         return @filtered;
2968 }
2969
2970 # note: fill_project_list_info must be run first,
2971 # for 'descr_long' and 'ctags' to be filled
2972 sub search_projects_list {
2973         my ($projlist, %opts) = @_;
2974         my $tagfilter  = $opts{'tagfilter'};
2975         my $searchtext = $opts{'searchtext'};
2976
2977         return @$projlist
2978                 unless ($tagfilter || $searchtext);
2979
2980         my @projects;
2981  PROJECT:
2982         foreach my $pr (@$projlist) {
2983
2984                 if ($tagfilter) {
2985                         next unless ref($pr->{'ctags'}) eq 'HASH';
2986                         next unless
2987                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2988                 }
2989
2990                 if ($searchtext) {
2991                         next unless
2992                                 $pr->{'path'} =~ /$searchtext/ ||
2993                                 $pr->{'descr_long'} =~ /$searchtext/;
2994                 }
2995
2996                 push @projects, $pr;
2997         }
2998
2999         return @projects;
3000 }
3001
3002 our $gitweb_project_owner = undef;
3003 sub git_get_project_list_from_file {
3004
3005         return if (defined $gitweb_project_owner);
3006
3007         $gitweb_project_owner = {};
3008         # read from file (url-encoded):
3009         # 'git%2Fgit.git Linus+Torvalds'
3010         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3011         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3012         if (-f $projects_list) {
3013                 open(my $fd, '<', $projects_list);
3014                 while (my $line = <$fd>) {
3015                         chomp $line;
3016                         my ($pr, $ow) = split ' ', $line;
3017                         $pr = unescape($pr);
3018                         $ow = unescape($ow);
3019                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3020                 }
3021                 close $fd;
3022         }
3023 }
3024
3025 sub git_get_project_owner {
3026         my $project = shift;
3027         my $owner;
3028
3029         return undef unless $project;
3030         $git_dir = "$projectroot/$project";
3031
3032         if (!defined $gitweb_project_owner) {
3033                 git_get_project_list_from_file();
3034         }
3035
3036         if (exists $gitweb_project_owner->{$project}) {
3037                 $owner = $gitweb_project_owner->{$project};
3038         }
3039         if (!defined $owner){
3040                 $owner = git_get_project_config('owner');
3041         }
3042         if (!defined $owner) {
3043                 $owner = get_file_owner("$git_dir");
3044         }
3045
3046         return $owner;
3047 }
3048
3049 sub git_get_last_activity {
3050         my ($path) = @_;
3051         my $fd;
3052
3053         $git_dir = "$projectroot/$path";
3054         open($fd, "-|", git_cmd(), 'for-each-ref',
3055              '--format=%(committer)',
3056              '--sort=-committerdate',
3057              '--count=1',
3058              'refs/heads') or return;
3059         my $most_recent = <$fd>;
3060         close $fd or return;
3061         if (defined $most_recent &&
3062             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3063                 my $timestamp = $1;
3064                 my $age = time - $timestamp;
3065                 return ($age, age_string($age));
3066         }
3067         return (undef, undef);
3068 }
3069
3070 # Implementation note: when a single remote is wanted, we cannot use 'git
3071 # remote show -n' because that command always work (assuming it's a remote URL
3072 # if it's not defined), and we cannot use 'git remote show' because that would
3073 # try to make a network roundtrip. So the only way to find if that particular
3074 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3075 # and when we find what we want.
3076 sub git_get_remotes_list {
3077         my $wanted = shift;
3078         my %remotes = ();
3079
3080         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3081         return unless $fd;
3082         while (my $remote = <$fd>) {
3083                 chomp $remote;
3084                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3085                 next if $wanted and not $remote eq $wanted;
3086                 my ($url, $key) = ($1, $2);
3087
3088                 $remotes{$remote} ||= { 'heads' => () };
3089                 $remotes{$remote}{$key} = $url;
3090         }
3091         close $fd or return;
3092         return wantarray ? %remotes : \%remotes;
3093 }
3094
3095 # Takes a hash of remotes as first parameter and fills it by adding the
3096 # available remote heads for each of the indicated remotes.
3097 sub fill_remote_heads {
3098         my $remotes = shift;
3099         my @heads = map { "remotes/$_" } keys %$remotes;
3100         my @remoteheads = git_get_heads_list(undef, @heads);
3101         foreach my $remote (keys %$remotes) {
3102                 $remotes->{$remote}{'heads'} = [ grep {
3103                         $_->{'name'} =~ s!^$remote/!!
3104                         } @remoteheads ];
3105         }
3106 }
3107
3108 sub git_get_references {
3109         my $type = shift || "";
3110         my %refs;
3111         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3112         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3113         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3114                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3115                 or return;
3116
3117         while (my $line = <$fd>) {
3118                 chomp $line;
3119                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3120                         if (defined $refs{$1}) {
3121                                 push @{$refs{$1}}, $2;
3122                         } else {
3123                                 $refs{$1} = [ $2 ];
3124                         }
3125                 }
3126         }
3127         close $fd or return;
3128         return \%refs;
3129 }
3130
3131 sub git_get_rev_name_tags {
3132         my $hash = shift || return undef;
3133
3134         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3135                 or return;
3136         my $name_rev = <$fd>;
3137         close $fd;
3138
3139         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3140                 return $1;
3141         } else {
3142                 # catches also '$hash undefined' output
3143                 return undef;
3144         }
3145 }
3146
3147 ## ----------------------------------------------------------------------
3148 ## parse to hash functions
3149
3150 sub parse_date {
3151         my $epoch = shift;
3152         my $tz = shift || "-0000";
3153
3154         my %date;
3155         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3156         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3157         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3158         $date{'hour'} = $hour;
3159         $date{'minute'} = $min;
3160         $date{'mday'} = $mday;
3161         $date{'day'} = $days[$wday];
3162         $date{'month'} = $months[$mon];
3163         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3164                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3165         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3166                              $mday, $months[$mon], $hour ,$min;
3167         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3168                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3169
3170         my ($tz_sign, $tz_hour, $tz_min) =
3171                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3172         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3173         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3174         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3175         $date{'hour_local'} = $hour;
3176         $date{'minute_local'} = $min;
3177         $date{'tz_local'} = $tz;
3178         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3179                                   1900+$year, $mon+1, $mday,
3180                                   $hour, $min, $sec, $tz);
3181         return %date;
3182 }
3183
3184 sub parse_tag {
3185         my $tag_id = shift;
3186         my %tag;
3187         my @comment;
3188
3189         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3190         $tag{'id'} = $tag_id;
3191         while (my $line = <$fd>) {
3192                 chomp $line;
3193                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3194                         $tag{'object'} = $1;
3195                 } elsif ($line =~ m/^type (.+)$/) {
3196                         $tag{'type'} = $1;
3197                 } elsif ($line =~ m/^tag (.+)$/) {
3198                         $tag{'name'} = $1;
3199                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3200                         $tag{'author'} = $1;
3201                         $tag{'author_epoch'} = $2;
3202                         $tag{'author_tz'} = $3;
3203                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3204                                 $tag{'author_name'}  = $1;
3205                                 $tag{'author_email'} = $2;
3206                         } else {
3207                                 $tag{'author_name'} = $tag{'author'};
3208                         }
3209                 } elsif ($line =~ m/--BEGIN/) {
3210                         push @comment, $line;
3211                         last;
3212                 } elsif ($line eq "") {
3213                         last;
3214                 }
3215         }
3216         push @comment, <$fd>;
3217         $tag{'comment'} = \@comment;
3218         close $fd or return;
3219         if (!defined $tag{'name'}) {
3220                 return
3221         };
3222         return %tag
3223 }
3224
3225 sub parse_commit_text {
3226         my ($commit_text, $withparents) = @_;
3227         my @commit_lines = split '\n', $commit_text;
3228         my %co;
3229
3230         pop @commit_lines; # Remove '\0'
3231
3232         if (! @commit_lines) {
3233                 return;
3234         }
3235
3236         my $header = shift @commit_lines;
3237         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3238                 return;
3239         }
3240         ($co{'id'}, my @parents) = split ' ', $header;
3241         while (my $line = shift @commit_lines) {
3242                 last if $line eq "\n";
3243                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3244                         $co{'tree'} = $1;
3245                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3246                         push @parents, $1;
3247                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3248                         $co{'author'} = to_utf8($1);
3249                         $co{'author_epoch'} = $2;
3250                         $co{'author_tz'} = $3;
3251                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3252                                 $co{'author_name'}  = $1;
3253                                 $co{'author_email'} = $2;
3254                         } else {
3255                                 $co{'author_name'} = $co{'author'};
3256                         }
3257                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3258                         $co{'committer'} = to_utf8($1);
3259                         $co{'committer_epoch'} = $2;
3260                         $co{'committer_tz'} = $3;
3261                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3262                                 $co{'committer_name'}  = $1;
3263                                 $co{'committer_email'} = $2;
3264                         } else {
3265                                 $co{'committer_name'} = $co{'committer'};
3266                         }
3267                 }
3268         }
3269         if (!defined $co{'tree'}) {
3270                 return;
3271         };
3272         $co{'parents'} = \@parents;
3273         $co{'parent'} = $parents[0];
3274
3275         foreach my $title (@commit_lines) {
3276                 $title =~ s/^    //;
3277                 if ($title ne "") {
3278                         $co{'title'} = chop_str($title, 80, 5);
3279                         # remove leading stuff of merges to make the interesting part visible
3280                         if (length($title) > 50) {
3281                                 $title =~ s/^Automatic //;
3282                                 $title =~ s/^merge (of|with) /Merge ... /i;
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(http|rsync):\/\///;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/(master|www|rsync)\.//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/kernel.org:?//;
3291                                 }
3292                                 if (length($title) > 50) {
3293                                         $title =~ s/\/pub\/scm//;
3294                                 }
3295                         }
3296                         $co{'title_short'} = chop_str($title, 50, 5);
3297                         last;
3298                 }
3299         }
3300         if (! defined $co{'title'} || $co{'title'} eq "") {
3301                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3302         }
3303         # remove added spaces
3304         foreach my $line (@commit_lines) {
3305                 $line =~ s/^    //;
3306         }
3307         $co{'comment'} = \@commit_lines;
3308
3309         my $age = time - $co{'committer_epoch'};
3310         $co{'age'} = $age;
3311         $co{'age_string'} = age_string($age);
3312         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3313         if ($age > 60*60*24*7*2) {
3314                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3315                 $co{'age_string_age'} = $co{'age_string'};
3316         } else {
3317                 $co{'age_string_date'} = $co{'age_string'};
3318                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3319         }
3320         return %co;
3321 }
3322
3323 sub parse_commit {
3324         my ($commit_id) = @_;
3325         my %co;
3326
3327         local $/ = "\0";
3328
3329         open my $fd, "-|", git_cmd(), "rev-list",
3330                 "--parents",
3331                 "--header",
3332                 "--max-count=1",
3333                 $commit_id,
3334                 "--",
3335                 or die_error(500, "Open git-rev-list failed");
3336         %co = parse_commit_text(<$fd>, 1);
3337         close $fd;
3338
3339         return %co;
3340 }
3341
3342 sub parse_commits {
3343         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3344         my @cos;
3345
3346         $maxcount ||= 1;
3347         $skip ||= 0;
3348
3349         local $/ = "\0";
3350
3351         open my $fd, "-|", git_cmd(), "rev-list",
3352                 "--header",
3353                 @args,
3354                 ("--max-count=" . $maxcount),
3355                 ("--skip=" . $skip),
3356                 @extra_options,
3357                 $commit_id,
3358                 "--",
3359                 ($filename ? ($filename) : ())
3360                 or die_error(500, "Open git-rev-list failed");
3361         while (my $line = <$fd>) {
3362                 my %co = parse_commit_text($line);
3363                 push @cos, \%co;
3364         }
3365         close $fd;
3366
3367         return wantarray ? @cos : \@cos;
3368 }
3369
3370 # parse line of git-diff-tree "raw" output
3371 sub parse_difftree_raw_line {
3372         my $line = shift;
3373         my %res;
3374
3375         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3376         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3377         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3378                 $res{'from_mode'} = $1;
3379                 $res{'to_mode'} = $2;
3380                 $res{'from_id'} = $3;
3381                 $res{'to_id'} = $4;
3382                 $res{'status'} = $5;
3383                 $res{'similarity'} = $6;
3384                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3385                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3386                 } else {
3387                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3388                 }
3389         }
3390         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3391         # combined diff (for merge commit)
3392         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3393                 $res{'nparents'}  = length($1);
3394                 $res{'from_mode'} = [ split(' ', $2) ];
3395                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3396                 $res{'from_id'} = [ split(' ', $3) ];
3397                 $res{'to_id'} = pop @{$res{'from_id'}};
3398                 $res{'status'} = [ split('', $4) ];
3399                 $res{'to_file'} = unquote($5);
3400         }
3401         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3402         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3403                 $res{'commit'} = $1;
3404         }
3405
3406         return wantarray ? %res : \%res;
3407 }
3408
3409 # wrapper: return parsed line of git-diff-tree "raw" output
3410 # (the argument might be raw line, or parsed info)
3411 sub parsed_difftree_line {
3412         my $line_or_ref = shift;
3413
3414         if (ref($line_or_ref) eq "HASH") {
3415                 # pre-parsed (or generated by hand)
3416                 return $line_or_ref;
3417         } else {
3418                 return parse_difftree_raw_line($line_or_ref);
3419         }
3420 }
3421
3422 # parse line of git-ls-tree output
3423 sub parse_ls_tree_line {
3424         my $line = shift;
3425         my %opts = @_;
3426         my %res;
3427
3428         if ($opts{'-l'}) {
3429                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3430                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3431
3432                 $res{'mode'} = $1;
3433                 $res{'type'} = $2;
3434                 $res{'hash'} = $3;
3435                 $res{'size'} = $4;
3436                 if ($opts{'-z'}) {
3437                         $res{'name'} = $5;
3438                 } else {
3439                         $res{'name'} = unquote($5);
3440                 }
3441         } else {
3442                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3443                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3444
3445                 $res{'mode'} = $1;
3446                 $res{'type'} = $2;
3447                 $res{'hash'} = $3;
3448                 if ($opts{'-z'}) {
3449                         $res{'name'} = $4;
3450                 } else {
3451                         $res{'name'} = unquote($4);
3452                 }
3453         }
3454
3455         return wantarray ? %res : \%res;
3456 }
3457
3458 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3459 sub parse_from_to_diffinfo {
3460         my ($diffinfo, $from, $to, @parents) = @_;
3461
3462         if ($diffinfo->{'nparents'}) {
3463                 # combined diff
3464                 $from->{'file'} = [];
3465                 $from->{'href'} = [];
3466                 fill_from_file_info($diffinfo, @parents)
3467                         unless exists $diffinfo->{'from_file'};
3468                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3469                         $from->{'file'}[$i] =
3470                                 defined $diffinfo->{'from_file'}[$i] ?
3471                                         $diffinfo->{'from_file'}[$i] :
3472                                         $diffinfo->{'to_file'};
3473                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3474                                 $from->{'href'}[$i] = href(action=>"blob",
3475                                                            hash_base=>$parents[$i],
3476                                                            hash=>$diffinfo->{'from_id'}[$i],
3477                                                            file_name=>$from->{'file'}[$i]);
3478                         } else {
3479                                 $from->{'href'}[$i] = undef;
3480                         }
3481                 }
3482         } else {
3483                 # ordinary (not combined) diff
3484                 $from->{'file'} = $diffinfo->{'from_file'};
3485                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3486                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3487                                                hash=>$diffinfo->{'from_id'},
3488                                                file_name=>$from->{'file'});
3489                 } else {
3490                         delete $from->{'href'};
3491                 }
3492         }
3493
3494         $to->{'file'} = $diffinfo->{'to_file'};
3495         if (!is_deleted($diffinfo)) { # file exists in result
3496                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3497                                      hash=>$diffinfo->{'to_id'},
3498                                      file_name=>$to->{'file'});
3499         } else {
3500                 delete $to->{'href'};
3501         }
3502 }
3503
3504 ## ......................................................................
3505 ## parse to array of hashes functions
3506
3507 sub git_get_heads_list {
3508         my ($limit, @classes) = @_;
3509         @classes = ('heads') unless @classes;
3510         my @patterns = map { "refs/$_" } @classes;
3511         my @headslist;
3512
3513         open my $fd, '-|', git_cmd(), 'for-each-ref',
3514                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3515                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3516                 @patterns
3517                 or return;
3518         while (my $line = <$fd>) {
3519                 my %ref_item;
3520
3521                 chomp $line;
3522                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3523                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3524                 my ($committer, $epoch, $tz) =
3525                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3526                 $ref_item{'fullname'}  = $name;
3527                 $name =~ s!^refs/(?:head|remote)s/!!;
3528
3529                 $ref_item{'name'}  = $name;
3530                 $ref_item{'id'}    = $hash;
3531                 $ref_item{'title'} = $title || '(no commit message)';
3532                 $ref_item{'epoch'} = $epoch;
3533                 if ($epoch) {
3534                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3535                 } else {
3536                         $ref_item{'age'} = "unknown";
3537                 }
3538
3539                 push @headslist, \%ref_item;
3540         }
3541         close $fd;
3542
3543         return wantarray ? @headslist : \@headslist;
3544 }
3545
3546 sub git_get_tags_list {
3547         my $limit = shift;
3548         my @tagslist;
3549
3550         open my $fd, '-|', git_cmd(), 'for-each-ref',
3551                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3552                 '--format=%(objectname) %(objecttype) %(refname) '.
3553                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3554                 'refs/tags'
3555                 or return;
3556         while (my $line = <$fd>) {
3557                 my %ref_item;
3558
3559                 chomp $line;
3560                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3561                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3562                 my ($creator, $epoch, $tz) =
3563                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3564                 $ref_item{'fullname'} = $name;
3565                 $name =~ s!^refs/tags/!!;
3566
3567                 $ref_item{'type'} = $type;
3568                 $ref_item{'id'} = $id;
3569                 $ref_item{'name'} = $name;
3570                 if ($type eq "tag") {
3571                         $ref_item{'subject'} = $title;
3572                         $ref_item{'reftype'} = $reftype;
3573                         $ref_item{'refid'}   = $refid;
3574                 } else {
3575                         $ref_item{'reftype'} = $type;
3576                         $ref_item{'refid'}   = $id;
3577                 }
3578
3579                 if ($type eq "tag" || $type eq "commit") {
3580                         $ref_item{'epoch'} = $epoch;
3581                         if ($epoch) {
3582                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3583                         } else {
3584                                 $ref_item{'age'} = "unknown";
3585                         }
3586                 }
3587
3588                 push @tagslist, \%ref_item;
3589         }
3590         close $fd;
3591
3592         return wantarray ? @tagslist : \@tagslist;
3593 }
3594
3595 ## ----------------------------------------------------------------------
3596 ## filesystem-related functions
3597
3598 sub get_file_owner {
3599         my $path = shift;
3600
3601         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3602         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3603         if (!defined $gcos) {
3604                 return undef;
3605         }
3606         my $owner = $gcos;
3607         $owner =~ s/[,;].*$//;
3608         return to_utf8($owner);
3609 }
3610
3611 # assume that file exists
3612 sub insert_file {
3613         my $filename = shift;
3614
3615         open my $fd, '<', $filename;
3616         print map { to_utf8($_) } <$fd>;
3617         close $fd;
3618 }
3619
3620 ## ......................................................................
3621 ## mimetype related functions
3622
3623 sub mimetype_guess_file {
3624         my $filename = shift;
3625         my $mimemap = shift;
3626         -r $mimemap or return undef;
3627
3628         my %mimemap;
3629         open(my $mh, '<', $mimemap) or return undef;
3630         while (<$mh>) {
3631                 next if m/^#/; # skip comments
3632                 my ($mimetype, @exts) = split(/\s+/);
3633                 foreach my $ext (@exts) {
3634                         $mimemap{$ext} = $mimetype;
3635                 }
3636         }
3637         close($mh);
3638
3639         $filename =~ /\.([^.]*)$/;
3640         return $mimemap{$1};
3641 }
3642
3643 sub mimetype_guess {
3644         my $filename = shift;
3645         my $mime;
3646         $filename =~ /\./ or return undef;
3647
3648         if ($mimetypes_file) {
3649                 my $file = $mimetypes_file;
3650                 if ($file !~ m!^/!) { # if it is relative path
3651                         # it is relative to project
3652                         $file = "$projectroot/$project/$file";
3653                 }
3654                 $mime = mimetype_guess_file($filename, $file);
3655         }
3656         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3657         return $mime;
3658 }
3659
3660 sub blob_mimetype {
3661         my $fd = shift;
3662         my $filename = shift;
3663
3664         if ($filename) {
3665                 my $mime = mimetype_guess($filename);
3666                 $mime and return $mime;
3667         }
3668
3669         # just in case
3670         return $default_blob_plain_mimetype unless $fd;
3671
3672         if (-T $fd) {
3673                 return 'text/plain';
3674         } elsif (! $filename) {
3675                 return 'application/octet-stream';
3676         } elsif ($filename =~ m/\.png$/i) {
3677                 return 'image/png';
3678         } elsif ($filename =~ m/\.gif$/i) {
3679                 return 'image/gif';
3680         } elsif ($filename =~ m/\.jpe?g$/i) {
3681                 return 'image/jpeg';
3682         } else {
3683                 return 'application/octet-stream';
3684         }
3685 }
3686
3687 sub blob_contenttype {
3688         my ($fd, $file_name, $type) = @_;
3689
3690         $type ||= blob_mimetype($fd, $file_name);
3691         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3692                 $type .= "; charset=$default_text_plain_charset";
3693         }
3694
3695         return $type;
3696 }
3697
3698 # guess file syntax for syntax highlighting; return undef if no highlighting
3699 # the name of syntax can (in the future) depend on syntax highlighter used
3700 sub guess_file_syntax {
3701         my ($highlight, $mimetype, $file_name) = @_;
3702         return undef unless ($highlight && defined $file_name);
3703         my $basename = basename($file_name, '.in');
3704         return $highlight_basename{$basename}
3705                 if exists $highlight_basename{$basename};
3706
3707         $basename =~ /\.([^.]*)$/;
3708         my $ext = $1 or return undef;
3709         return $highlight_ext{$ext}
3710                 if exists $highlight_ext{$ext};
3711
3712         return undef;
3713 }
3714
3715 # run highlighter and return FD of its output,
3716 # or return original FD if no highlighting
3717 sub run_highlighter {
3718         my ($fd, $highlight, $syntax) = @_;
3719         return $fd unless ($highlight && defined $syntax);
3720
3721         close $fd;
3722         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3723                   quote_command($highlight_bin).
3724                   " --replace-tabs=8 --fragment --syntax $syntax |"
3725                 or die_error(500, "Couldn't open file or run syntax highlighter");
3726         return $fd;
3727 }
3728
3729 ## ======================================================================
3730 ## functions printing HTML: header, footer, error page
3731
3732 sub get_page_title {
3733         my $title = to_utf8($site_name);
3734
3735         return $title unless (defined $project);
3736         $title .= " - " . to_utf8($project);
3737
3738         return $title unless (defined $action);
3739         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3740
3741         return $title unless (defined $file_name);
3742         $title .= " - " . esc_path($file_name);
3743         if ($action eq "tree" && $file_name !~ m|/$|) {
3744                 $title .= "/";
3745         }
3746
3747         return $title;
3748 }
3749
3750 sub get_content_type_html {
3751         # require explicit support from the UA if we are to send the page as
3752         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3753         # we have to do this because MSIE sometimes globs '*/*', pretending to
3754         # support xhtml+xml but choking when it gets what it asked for.
3755         if (defined $cgi->http('HTTP_ACCEPT') &&
3756             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3757             $cgi->Accept('application/xhtml+xml') != 0) {
3758                 return 'application/xhtml+xml';
3759         } else {
3760                 return 'text/html';
3761         }
3762 }
3763
3764 sub print_feed_meta {
3765         if (defined $project) {
3766                 my %href_params = get_feed_info();
3767                 if (!exists $href_params{'-title'}) {
3768                         $href_params{'-title'} = 'log';
3769                 }
3770
3771                 foreach my $format (qw(RSS Atom)) {
3772                         my $type = lc($format);
3773                         my %link_attr = (
3774                                 '-rel' => 'alternate',
3775                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3776                                 '-type' => "application/$type+xml"
3777                         );
3778
3779                         $href_params{'action'} = $type;
3780                         $link_attr{'-href'} = href(%href_params);
3781                         print "<link ".
3782                               "rel=\"$link_attr{'-rel'}\" ".
3783                               "title=\"$link_attr{'-title'}\" ".
3784                               "href=\"$link_attr{'-href'}\" ".
3785                               "type=\"$link_attr{'-type'}\" ".
3786                               "/>\n";
3787
3788                         $href_params{'extra_options'} = '--no-merges';
3789                         $link_attr{'-href'} = href(%href_params);
3790                         $link_attr{'-title'} .= ' (no merges)';
3791                         print "<link ".
3792                               "rel=\"$link_attr{'-rel'}\" ".
3793                               "title=\"$link_attr{'-title'}\" ".
3794                               "href=\"$link_attr{'-href'}\" ".
3795                               "type=\"$link_attr{'-type'}\" ".
3796                               "/>\n";
3797                 }
3798
3799         } else {
3800                 printf('<link rel="alternate" title="%s projects list" '.
3801                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3803                 printf('<link rel="alternate" title="%s projects feeds" '.
3804                        'href="%s" type="text/x-opml" />'."\n",
3805                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3806         }
3807 }
3808
3809 sub print_header_links {
3810         my $status = shift;
3811
3812         # print out each stylesheet that exist, providing backwards capability
3813         # for those people who defined $stylesheet in a config file
3814         if (defined $stylesheet) {
3815                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3816         } else {
3817                 foreach my $stylesheet (@stylesheets) {
3818                         next unless $stylesheet;
3819                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3820                 }
3821         }
3822         print_feed_meta()
3823                 if ($status eq '200 OK');
3824         if (defined $favicon) {
3825                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3826         }
3827 }
3828
3829 sub print_nav_breadcrumbs {
3830         my %opts = @_;
3831
3832         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3833         if (defined $project) {
3834                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3835                 if (defined $action) {
3836                         my $action_print = $action ;
3837                         if (defined $opts{-action_extra}) {
3838                                 $action_print = $cgi->a({-href => href(action=>$action)},
3839                                         $action);
3840                         }
3841                         print " / $action_print";
3842                 }
3843                 if (defined $opts{-action_extra}) {
3844                         print " / $opts{-action_extra}";
3845                 }
3846                 print "\n";
3847         }
3848 }
3849
3850 sub print_search_form {
3851         if (!defined $searchtext) {
3852                 $searchtext = "";
3853         }
3854         my $search_hash;
3855         if (defined $hash_base) {
3856                 $search_hash = $hash_base;
3857         } elsif (defined $hash) {
3858                 $search_hash = $hash;
3859         } else {
3860                 $search_hash = "HEAD";
3861         }
3862         my $action = $my_uri;
3863         my $use_pathinfo = gitweb_check_feature('pathinfo');
3864         if ($use_pathinfo) {
3865                 $action .= "/".esc_url($project);
3866         }
3867         print $cgi->startform(-method => "get", -action => $action) .
3868               "<div class=\"search\">\n" .
3869               (!$use_pathinfo &&
3870               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3871               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3872               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3873               $cgi->popup_menu(-name => 'st', -default => 'commit',
3874                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3875               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3876               " search:\n",
3877               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3878               "<span title=\"Extended regular expression\">" .
3879               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3880                              -checked => $search_use_regexp) .
3881               "</span>" .
3882               "</div>" .
3883               $cgi->end_form() . "\n";
3884 }
3885
3886 sub git_header_html {
3887         my $status = shift || "200 OK";
3888         my $expires = shift;
3889         my %opts = @_;
3890
3891         my $title = get_page_title();
3892         my $content_type = get_content_type_html();
3893         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3894                            -status=> $status, -expires => $expires)
3895                 unless ($opts{'-no_http_header'});
3896         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3897         print <<EOF;
3898 <?xml version="1.0" encoding="utf-8"?>
3899 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3900 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3901 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3902 <!-- git core binaries version $git_version -->
3903 <head>
3904 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3905 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3906 <meta name="robots" content="index, nofollow"/>
3907 <title>$title</title>
3908 EOF
3909         # the stylesheet, favicon etc urls won't work correctly with path_info
3910         # unless we set the appropriate base URL
3911         if ($ENV{'PATH_INFO'}) {
3912                 print "<base href=\"".esc_url($base_url)."\" />\n";
3913         }
3914         print_header_links($status);
3915
3916         if (defined $site_html_head_string) {
3917                 print to_utf8($site_html_head_string);
3918         }
3919
3920         print "</head>\n" .
3921               "<body>\n";
3922
3923         if (defined $site_header && -f $site_header) {
3924                 insert_file($site_header);
3925         }
3926
3927         print "<div class=\"page_header\">\n";
3928         if (defined $logo) {
3929                 print $cgi->a({-href => esc_url($logo_url),
3930                                -title => $logo_label},
3931                               $cgi->img({-src => esc_url($logo),
3932                                          -width => 72, -height => 27,
3933                                          -alt => "git",
3934                                          -class => "logo"}));
3935         }
3936         print_nav_breadcrumbs(%opts);
3937         print "</div>\n";
3938
3939         my $have_search = gitweb_check_feature('search');
3940         if (defined $project && $have_search) {
3941                 print_search_form();
3942         }
3943 }
3944
3945 sub git_footer_html {
3946         my $feed_class = 'rss_logo';
3947
3948         print "<div class=\"page_footer\">\n";
3949         if (defined $project) {
3950                 my $descr = git_get_project_description($project);
3951                 if (defined $descr) {
3952                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3953                 }
3954
3955                 my %href_params = get_feed_info();
3956                 if (!%href_params) {
3957                         $feed_class .= ' generic';
3958                 }
3959                 $href_params{'-title'} ||= 'log';
3960
3961                 foreach my $format (qw(RSS Atom)) {
3962                         $href_params{'action'} = lc($format);
3963                         print $cgi->a({-href => href(%href_params),
3964                                       -title => "$href_params{'-title'} $format feed",
3965                                       -class => $feed_class}, $format)."\n";
3966                 }
3967
3968         } else {
3969                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3970                               -class => $feed_class}, "OPML") . " ";
3971                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3972                               -class => $feed_class}, "TXT") . "\n";
3973         }
3974         print "</div>\n"; # class="page_footer"
3975
3976         if (defined $t0 && gitweb_check_feature('timed')) {
3977                 print "<div id=\"generating_info\">\n";
3978                 print 'This page took '.
3979                       '<span id="generating_time" class="time_span">'.
3980                       tv_interval($t0, [ gettimeofday() ]).
3981                       ' seconds </span>'.
3982                       ' and '.
3983                       '<span id="generating_cmd">'.
3984                       $number_of_git_cmds.
3985                       '</span> git commands '.
3986                       " to generate.\n";
3987                 print "</div>\n"; # class="page_footer"
3988         }
3989
3990         if (defined $site_footer && -f $site_footer) {
3991                 insert_file($site_footer);
3992         }
3993
3994         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3995         if (defined $action &&
3996             $action eq 'blame_incremental') {
3997                 print qq!<script type="text/javascript">\n!.
3998                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3999                       qq!           "!. href() .qq!");\n!.
4000                       qq!</script>\n!;
4001         } else {
4002                 my ($jstimezone, $tz_cookie, $datetime_class) =
4003                         gitweb_get_feature('javascript-timezone');
4004
4005                 print qq!<script type="text/javascript">\n!.
4006                       qq!window.onload = function () {\n!;
4007                 if (gitweb_check_feature('javascript-actions')) {
4008                         print qq!       fixLinks();\n!;
4009                 }
4010                 if ($jstimezone && $tz_cookie && $datetime_class) {
4011                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4012                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4013                 }
4014                 print qq!};\n!.
4015                       qq!</script>\n!;
4016         }
4017
4018         print "</body>\n" .
4019               "</html>";
4020 }
4021
4022 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4023 # Example: die_error(404, 'Hash not found')
4024 # By convention, use the following status codes (as defined in RFC 2616):
4025 # 400: Invalid or missing CGI parameters, or
4026 #      requested object exists but has wrong type.
4027 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4028 #      this server or project.
4029 # 404: Requested object/revision/project doesn't exist.
4030 # 500: The server isn't configured properly, or
4031 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4032 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4033 # 503: The server is currently unavailable (because it is overloaded,
4034 #      or down for maintenance).  Generally, this is a temporary state.
4035 sub die_error {
4036         my $status = shift || 500;
4037         my $error = esc_html(shift) || "Internal Server Error";
4038         my $extra = shift;
4039         my %opts = @_;
4040
4041         my %http_responses = (
4042                 400 => '400 Bad Request',
4043                 403 => '403 Forbidden',
4044                 404 => '404 Not Found',
4045                 500 => '500 Internal Server Error',
4046                 503 => '503 Service Unavailable',
4047         );
4048         git_header_html($http_responses{$status}, undef, %opts);
4049         print <<EOF;
4050 <div class="page_body">
4051 <br /><br />
4052 $status - $error
4053 <br />
4054 EOF
4055         if (defined $extra) {
4056                 print "<hr />\n" .
4057                       "$extra\n";
4058         }
4059         print "</div>\n";
4060
4061         git_footer_html();
4062         goto DONE_GITWEB
4063                 unless ($opts{'-error_handler'});
4064 }
4065
4066 ## ----------------------------------------------------------------------
4067 ## functions printing or outputting HTML: navigation
4068
4069 sub git_print_page_nav {
4070         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4071         $extra = '' if !defined $extra; # pager or formats
4072
4073         my @navs = qw(summary shortlog log commit commitdiff tree);
4074         if ($suppress) {
4075                 @navs = grep { $_ ne $suppress } @navs;
4076         }
4077
4078         my %arg = map { $_ => {action=>$_} } @navs;
4079         if (defined $head) {
4080                 for (qw(commit commitdiff)) {
4081                         $arg{$_}{'hash'} = $head;
4082                 }
4083                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4084                         for (qw(shortlog log)) {
4085                                 $arg{$_}{'hash'} = $head;
4086                         }
4087                 }
4088         }
4089
4090         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4091         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4092
4093         my @actions = gitweb_get_feature('actions');
4094         my %repl = (
4095                 '%' => '%',
4096                 'n' => $project,         # project name
4097                 'f' => $git_dir,         # project path within filesystem
4098                 'h' => $treehead || '',  # current hash ('h' parameter)
4099                 'b' => $treebase || '',  # hash base ('hb' parameter)
4100         );
4101         while (@actions) {
4102                 my ($label, $link, $pos) = splice(@actions,0,3);
4103                 # insert
4104                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4105                 # munch munch
4106                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4107                 $arg{$label}{'_href'} = $link;
4108         }
4109
4110         print "<div class=\"page_nav\">\n" .
4111                 (join " | ",
4112                  map { $_ eq $current ?
4113                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4114                  } @navs);
4115         print "<br/>\n$extra<br/>\n" .
4116               "</div>\n";
4117 }
4118
4119 # returns a submenu for the nagivation of the refs views (tags, heads,
4120 # remotes) with the current view disabled and the remotes view only
4121 # available if the feature is enabled
4122 sub format_ref_views {
4123         my ($current) = @_;
4124         my @ref_views = qw{tags heads};
4125         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4126         return join " | ", map {
4127                 $_ eq $current ? $_ :
4128                 $cgi->a({-href => href(action=>$_)}, $_)
4129         } @ref_views
4130 }
4131
4132 sub format_paging_nav {
4133         my ($action, $page, $has_next_link) = @_;
4134         my $paging_nav;
4135
4136
4137         if ($page > 0) {
4138                 $paging_nav .=
4139                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4140                         " &sdot; " .
4141                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4142                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4143         } else {
4144                 $paging_nav .= "first &sdot; prev";
4145         }
4146
4147         if ($has_next_link) {
4148                 $paging_nav .= " &sdot; " .
4149                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4150                                  -accesskey => "n", -title => "Alt-n"}, "next");
4151         } else {
4152                 $paging_nav .= " &sdot; next";
4153         }
4154
4155         return $paging_nav;
4156 }
4157
4158 ## ......................................................................
4159 ## functions printing or outputting HTML: div
4160
4161 sub git_print_header_div {
4162         my ($action, $title, $hash, $hash_base) = @_;
4163         my %args = ();
4164
4165         $args{'action'} = $action;
4166         $args{'hash'} = $hash if $hash;
4167         $args{'hash_base'} = $hash_base if $hash_base;
4168
4169         print "<div class=\"header\">\n" .
4170               $cgi->a({-href => href(%args), -class => "title"},
4171               $title ? $title : $action) .
4172               "\n</div>\n";
4173 }
4174
4175 sub format_repo_url {
4176         my ($name, $url) = @_;
4177         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4178 }
4179
4180 # Group output by placing it in a DIV element and adding a header.
4181 # Options for start_div() can be provided by passing a hash reference as the
4182 # first parameter to the function.
4183 # Options to git_print_header_div() can be provided by passing an array
4184 # reference. This must follow the options to start_div if they are present.
4185 # The content can be a scalar, which is output as-is, a scalar reference, which
4186 # is output after html escaping, an IO handle passed either as *handle or
4187 # *handle{IO}, or a function reference. In the latter case all following
4188 # parameters will be taken as argument to the content function call.
4189 sub git_print_section {
4190         my ($div_args, $header_args, $content);
4191         my $arg = shift;
4192         if (ref($arg) eq 'HASH') {
4193                 $div_args = $arg;
4194                 $arg = shift;
4195         }
4196         if (ref($arg) eq 'ARRAY') {
4197                 $header_args = $arg;
4198                 $arg = shift;
4199         }
4200         $content = $arg;
4201
4202         print $cgi->start_div($div_args);
4203         git_print_header_div(@$header_args);
4204
4205         if (ref($content) eq 'CODE') {
4206                 $content->(@_);
4207         } elsif (ref($content) eq 'SCALAR') {
4208                 print esc_html($$content);
4209         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4210                 print <$content>;
4211         } elsif (!ref($content) && defined($content)) {
4212                 print $content;
4213         }
4214
4215         print $cgi->end_div;
4216 }
4217
4218 sub format_timestamp_html {
4219         my $date = shift;
4220         my $strtime = $date->{'rfc2822'};
4221
4222         my (undef, undef, $datetime_class) =
4223                 gitweb_get_feature('javascript-timezone');
4224         if ($datetime_class) {
4225                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4226         }
4227
4228         my $localtime_format = '(%02d:%02d %s)';
4229         if ($date->{'hour_local'} < 6) {
4230                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4231         }
4232         $strtime .= ' ' .
4233                     sprintf($localtime_format,
4234                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4235
4236         return $strtime;
4237 }
4238
4239 # Outputs the author name and date in long form
4240 sub git_print_authorship {
4241         my $co = shift;
4242         my %opts = @_;
4243         my $tag = $opts{-tag} || 'div';
4244         my $author = $co->{'author_name'};
4245
4246         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4247         print "<$tag class=\"author_date\">" .
4248               format_search_author($author, "author", esc_html($author)) .
4249               " [".format_timestamp_html(\%ad)."]".
4250               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4251               "</$tag>\n";
4252 }
4253
4254 # Outputs table rows containing the full author or committer information,
4255 # in the format expected for 'commit' view (& similar).
4256 # Parameters are a commit hash reference, followed by the list of people
4257 # to output information for. If the list is empty it defaults to both
4258 # author and committer.
4259 sub git_print_authorship_rows {
4260         my $co = shift;
4261         # too bad we can't use @people = @_ || ('author', 'committer')
4262         my @people = @_;
4263         @people = ('author', 'committer') unless @people;
4264         foreach my $who (@people) {
4265                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4266                 print "<tr><td>$who</td><td>" .
4267                       format_search_author($co->{"${who}_name"}, $who,
4268                                            esc_html($co->{"${who}_name"})) . " " .
4269                       format_search_author($co->{"${who}_email"}, $who,
4270                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4271                       "</td><td rowspan=\"2\">" .
4272                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4273                       "</td></tr>\n" .
4274                       "<tr>" .
4275                       "<td></td><td>" .
4276                       format_timestamp_html(\%wd) .
4277                       "</td>" .
4278                       "</tr>\n";
4279         }
4280 }
4281
4282 sub git_print_page_path {
4283         my $name = shift;
4284         my $type = shift;
4285         my $hb = shift;
4286
4287
4288         print "<div class=\"page_path\">";
4289         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4290                       -title => 'tree root'}, to_utf8("[$project]"));
4291         print " / ";
4292         if (defined $name) {
4293                 my @dirname = split '/', $name;
4294                 my $basename = pop @dirname;
4295                 my $fullname = '';
4296
4297                 foreach my $dir (@dirname) {
4298                         $fullname .= ($fullname ? '/' : '') . $dir;
4299                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4300                                                      hash_base=>$hb),
4301                                       -title => $fullname}, esc_path($dir));
4302                         print " / ";
4303                 }
4304                 if (defined $type && $type eq 'blob') {
4305                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4306                                                      hash_base=>$hb),
4307                                       -title => $name}, esc_path($basename));
4308                 } elsif (defined $type && $type eq 'tree') {
4309                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4310                                                      hash_base=>$hb),
4311                                       -title => $name}, esc_path($basename));
4312                         print " / ";
4313                 } else {
4314                         print esc_path($basename);
4315                 }
4316         }
4317         print "<br/></div>\n";
4318 }
4319
4320 sub git_print_log {
4321         my $log = shift;
4322         my %opts = @_;
4323
4324         if ($opts{'-remove_title'}) {
4325                 # remove title, i.e. first line of log
4326                 shift @$log;
4327         }
4328         # remove leading empty lines
4329         while (defined $log->[0] && $log->[0] eq "") {
4330                 shift @$log;
4331         }
4332
4333         # print log
4334         my $signoff = 0;
4335         my $empty = 0;
4336         foreach my $line (@$log) {
4337                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4338                         $signoff = 1;
4339                         $empty = 0;
4340                         if (! $opts{'-remove_signoff'}) {
4341                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4342                                 next;
4343                         } else {
4344                                 # remove signoff lines
4345                                 next;
4346                         }
4347                 } else {
4348                         $signoff = 0;
4349                 }
4350
4351                 # print only one empty line
4352                 # do not print empty line after signoff
4353                 if ($line eq "") {
4354                         next if ($empty || $signoff);
4355                         $empty = 1;
4356                 } else {
4357                         $empty = 0;
4358                 }
4359
4360                 print format_log_line_html($line) . "<br/>\n";
4361         }
4362
4363         if ($opts{'-final_empty_line'}) {
4364                 # end with single empty line
4365                 print "<br/>\n" unless $empty;
4366         }
4367 }
4368
4369 # return link target (what link points to)
4370 sub git_get_link_target {
4371         my $hash = shift;
4372         my $link_target;
4373
4374         # read link
4375         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4376                 or return;
4377         {
4378                 local $/ = undef;
4379                 $link_target = <$fd>;
4380         }
4381         close $fd
4382                 or return;
4383
4384         return $link_target;
4385 }
4386
4387 # given link target, and the directory (basedir) the link is in,
4388 # return target of link relative to top directory (top tree);
4389 # return undef if it is not possible (including absolute links).
4390 sub normalize_link_target {
4391         my ($link_target, $basedir) = @_;
4392
4393         # absolute symlinks (beginning with '/') cannot be normalized
4394         return if (substr($link_target, 0, 1) eq '/');
4395
4396         # normalize link target to path from top (root) tree (dir)
4397         my $path;
4398         if ($basedir) {
4399                 $path = $basedir . '/' . $link_target;
4400         } else {
4401                 # we are in top (root) tree (dir)
4402                 $path = $link_target;
4403         }
4404
4405         # remove //, /./, and /../
4406         my @path_parts;
4407         foreach my $part (split('/', $path)) {
4408                 # discard '.' and ''
4409                 next if (!$part || $part eq '.');
4410                 # handle '..'
4411                 if ($part eq '..') {
4412                         if (@path_parts) {
4413                                 pop @path_parts;
4414                         } else {
4415                                 # link leads outside repository (outside top dir)
4416                                 return;
4417                         }
4418                 } else {
4419                         push @path_parts, $part;
4420                 }
4421         }
4422         $path = join('/', @path_parts);
4423
4424         return $path;
4425 }
4426
4427 # print tree entry (row of git_tree), but without encompassing <tr> element
4428 sub git_print_tree_entry {
4429         my ($t, $basedir, $hash_base, $have_blame) = @_;
4430
4431         my %base_key = ();
4432         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4433
4434         # The format of a table row is: mode list link.  Where mode is
4435         # the mode of the entry, list is the name of the entry, an href,
4436         # and link is the action links of the entry.
4437
4438         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4439         if (exists $t->{'size'}) {
4440                 print "<td class=\"size\">$t->{'size'}</td>\n";
4441         }
4442         if ($t->{'type'} eq "blob") {
4443                 print "<td class=\"list\">" .
4444                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4445                                                file_name=>"$basedir$t->{'name'}", %base_key),
4446                                 -class => "list"}, esc_path($t->{'name'}));
4447                 if (S_ISLNK(oct $t->{'mode'})) {
4448                         my $link_target = git_get_link_target($t->{'hash'});
4449                         if ($link_target) {
4450                                 my $norm_target = normalize_link_target($link_target, $basedir);
4451                                 if (defined $norm_target) {
4452                                         print " -> " .
4453                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4454                                                                      file_name=>$norm_target),
4455                                                        -title => $norm_target}, esc_path($link_target));
4456                                 } else {
4457                                         print " -> " . esc_path($link_target);
4458                                 }
4459                         }
4460                 }
4461                 print "</td>\n";
4462                 print "<td class=\"link\">";
4463                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4464                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4465                               "blob");
4466                 if ($have_blame) {
4467                         print " | " .
4468                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4469                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4470                                       "blame");
4471                 }
4472                 if (defined $hash_base) {
4473                         print " | " .
4474                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4475                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4476                                       "history");
4477                 }
4478                 print " | " .
4479                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4480                                                file_name=>"$basedir$t->{'name'}")},
4481                                 "raw");
4482                 print "</td>\n";
4483
4484         } elsif ($t->{'type'} eq "tree") {
4485                 print "<td class=\"list\">";
4486                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4487                                              file_name=>"$basedir$t->{'name'}",
4488                                              %base_key)},
4489                               esc_path($t->{'name'}));
4490                 print "</td>\n";
4491                 print "<td class=\"link\">";
4492                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4493                                              file_name=>"$basedir$t->{'name'}",
4494                                              %base_key)},
4495                               "tree");
4496                 if (defined $hash_base) {
4497                         print " | " .
4498                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4499                                                      file_name=>"$basedir$t->{'name'}")},
4500                                       "history");
4501                 }
4502                 print "</td>\n";
4503         } else {
4504                 # unknown object: we can only present history for it
4505                 # (this includes 'commit' object, i.e. submodule support)
4506                 print "<td class=\"list\">" .
4507                       esc_path($t->{'name'}) .
4508                       "</td>\n";
4509                 print "<td class=\"link\">";
4510                 if (defined $hash_base) {
4511                         print $cgi->a({-href => href(action=>"history",
4512                                                      hash_base=>$hash_base,
4513                                                      file_name=>"$basedir$t->{'name'}")},
4514                                       "history");
4515                 }
4516                 print "</td>\n";
4517         }
4518 }
4519
4520 ## ......................................................................
4521 ## functions printing large fragments of HTML
4522
4523 # get pre-image filenames for merge (combined) diff
4524 sub fill_from_file_info {
4525         my ($diff, @parents) = @_;
4526
4527         $diff->{'from_file'} = [ ];
4528         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4529         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4530                 if ($diff->{'status'}[$i] eq 'R' ||
4531                     $diff->{'status'}[$i] eq 'C') {
4532                         $diff->{'from_file'}[$i] =
4533                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4534                 }
4535         }
4536
4537         return $diff;
4538 }
4539
4540 # is current raw difftree line of file deletion
4541 sub is_deleted {
4542         my $diffinfo = shift;
4543
4544         return $diffinfo->{'to_id'} eq ('0' x 40);
4545 }
4546
4547 # does patch correspond to [previous] difftree raw line
4548 # $diffinfo  - hashref of parsed raw diff format
4549 # $patchinfo - hashref of parsed patch diff format
4550 #              (the same keys as in $diffinfo)
4551 sub is_patch_split {
4552         my ($diffinfo, $patchinfo) = @_;
4553
4554         return defined $diffinfo && defined $patchinfo
4555                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4556 }
4557
4558
4559 sub git_difftree_body {
4560         my ($difftree, $hash, @parents) = @_;
4561         my ($parent) = $parents[0];
4562         my $have_blame = gitweb_check_feature('blame');
4563         print "<div class=\"list_head\">\n";
4564         if ($#{$difftree} > 10) {
4565                 print(($#{$difftree} + 1) . " files changed:\n");
4566         }
4567         print "</div>\n";
4568
4569         print "<table class=\"" .
4570               (@parents > 1 ? "combined " : "") .
4571               "diff_tree\">\n";
4572
4573         # header only for combined diff in 'commitdiff' view
4574         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4575         if ($has_header) {
4576                 # table header
4577                 print "<thead><tr>\n" .
4578                        "<th></th><th></th>\n"; # filename, patchN link
4579                 for (my $i = 0; $i < @parents; $i++) {
4580                         my $par = $parents[$i];
4581                         print "<th>" .
4582                               $cgi->a({-href => href(action=>"commitdiff",
4583                                                      hash=>$hash, hash_parent=>$par),
4584                                        -title => 'commitdiff to parent number ' .
4585                                                   ($i+1) . ': ' . substr($par,0,7)},
4586                                       $i+1) .
4587                               "&nbsp;</th>\n";
4588                 }
4589                 print "</tr></thead>\n<tbody>\n";
4590         }
4591
4592         my $alternate = 1;
4593         my $patchno = 0;
4594         foreach my $line (@{$difftree}) {
4595                 my $diff = parsed_difftree_line($line);
4596
4597                 if ($alternate) {
4598                         print "<tr class=\"dark\">\n";
4599                 } else {
4600                         print "<tr class=\"light\">\n";
4601                 }
4602                 $alternate ^= 1;
4603
4604                 if (exists $diff->{'nparents'}) { # combined diff
4605
4606                         fill_from_file_info($diff, @parents)
4607                                 unless exists $diff->{'from_file'};
4608
4609                         if (!is_deleted($diff)) {
4610                                 # file exists in the result (child) commit
4611                                 print "<td>" .
4612                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4613                                                              file_name=>$diff->{'to_file'},
4614                                                              hash_base=>$hash),
4615                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4616                                       "</td>\n";
4617                         } else {
4618                                 print "<td>" .
4619                                       esc_path($diff->{'to_file'}) .
4620                                       "</td>\n";
4621                         }
4622
4623                         if ($action eq 'commitdiff') {
4624                                 # link to patch
4625                                 $patchno++;
4626                                 print "<td class=\"link\">" .
4627                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4628                                               "patch") .
4629                                       " | " .
4630                                       "</td>\n";
4631                         }
4632
4633                         my $has_history = 0;
4634                         my $not_deleted = 0;
4635                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4636                                 my $hash_parent = $parents[$i];
4637                                 my $from_hash = $diff->{'from_id'}[$i];
4638                                 my $from_path = $diff->{'from_file'}[$i];
4639                                 my $status = $diff->{'status'}[$i];
4640
4641                                 $has_history ||= ($status ne 'A');
4642                                 $not_deleted ||= ($status ne 'D');
4643
4644                                 if ($status eq 'A') {
4645                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4646                                 } elsif ($status eq 'D') {
4647                                         print "<td class=\"link\">" .
4648                                               $cgi->a({-href => href(action=>"blob",
4649                                                                      hash_base=>$hash,
4650                                                                      hash=>$from_hash,
4651                                                                      file_name=>$from_path)},
4652                                                       "blob" . ($i+1)) .
4653                                               " | </td>\n";
4654                                 } else {
4655                                         if ($diff->{'to_id'} eq $from_hash) {
4656                                                 print "<td class=\"link nochange\">";
4657                                         } else {
4658                                                 print "<td class=\"link\">";
4659                                         }
4660                                         print $cgi->a({-href => href(action=>"blobdiff",
4661                                                                      hash=>$diff->{'to_id'},
4662                                                                      hash_parent=>$from_hash,
4663                                                                      hash_base=>$hash,
4664                                                                      hash_parent_base=>$hash_parent,
4665                                                                      file_name=>$diff->{'to_file'},
4666                                                                      file_parent=>$from_path)},
4667                                                       "diff" . ($i+1)) .
4668                                               " | </td>\n";
4669                                 }
4670                         }
4671
4672                         print "<td class=\"link\">";
4673                         if ($not_deleted) {
4674                                 print $cgi->a({-href => href(action=>"blob",
4675                                                              hash=>$diff->{'to_id'},
4676                                                              file_name=>$diff->{'to_file'},
4677                                                              hash_base=>$hash)},
4678                                               "blob");
4679                                 print " | " if ($has_history);
4680                         }
4681                         if ($has_history) {
4682                                 print $cgi->a({-href => href(action=>"history",
4683                                                              file_name=>$diff->{'to_file'},
4684                                                              hash_base=>$hash)},
4685                                               "history");
4686                         }
4687                         print "</td>\n";
4688
4689                         print "</tr>\n";
4690                         next; # instead of 'else' clause, to avoid extra indent
4691                 }
4692                 # else ordinary diff
4693
4694                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4695                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4696                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4697                         $to_mode_oct = oct $diff->{'to_mode'};
4698                         if (S_ISREG($to_mode_oct)) { # only for regular file
4699                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4700                         }
4701                         $to_file_type = file_type($diff->{'to_mode'});
4702                 }
4703                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4704                         $from_mode_oct = oct $diff->{'from_mode'};
4705                         if (S_ISREG($from_mode_oct)) { # only for regular file
4706                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4707                         }
4708                         $from_file_type = file_type($diff->{'from_mode'});
4709                 }
4710
4711                 if ($diff->{'status'} eq "A") { # created
4712                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4713                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4714                         $mode_chng   .= "]</span>";
4715                         print "<td>";
4716                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4717                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4718                                       -class => "list"}, esc_path($diff->{'file'}));
4719                         print "</td>\n";
4720                         print "<td>$mode_chng</td>\n";
4721                         print "<td class=\"link\">";
4722                         if ($action eq 'commitdiff') {
4723                                 # link to patch
4724                                 $patchno++;
4725                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4726                                               "patch") .
4727                                       " | ";
4728                         }
4729                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4730                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4731                                       "blob");
4732                         print "</td>\n";
4733
4734                 } elsif ($diff->{'status'} eq "D") { # deleted
4735                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4736                         print "<td>";
4737                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4738                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4739                                        -class => "list"}, esc_path($diff->{'file'}));
4740                         print "</td>\n";
4741                         print "<td>$mode_chng</td>\n";
4742                         print "<td class=\"link\">";
4743                         if ($action eq 'commitdiff') {
4744                                 # link to patch
4745                                 $patchno++;
4746                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4747                                               "patch") .
4748                                       " | ";
4749                         }
4750                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4751                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4752                                       "blob") . " | ";
4753                         if ($have_blame) {
4754                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4755                                                              file_name=>$diff->{'file'})},
4756                                               "blame") . " | ";
4757                         }
4758                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4759                                                      file_name=>$diff->{'file'})},
4760                                       "history");
4761                         print "</td>\n";
4762
4763                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4764                         my $mode_chnge = "";
4765                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4766                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4767                                 if ($from_file_type ne $to_file_type) {
4768                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4769                                 }
4770                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4771                                         if ($from_mode_str && $to_mode_str) {
4772                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4773                                         } elsif ($to_mode_str) {
4774                                                 $mode_chnge .= " mode: $to_mode_str";
4775                                         }
4776                                 }
4777                                 $mode_chnge .= "]</span>\n";
4778                         }
4779                         print "<td>";
4780                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4781                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4782                                       -class => "list"}, esc_path($diff->{'file'}));
4783                         print "</td>\n";
4784                         print "<td>$mode_chnge</td>\n";
4785                         print "<td class=\"link\">";
4786                         if ($action eq 'commitdiff') {
4787                                 # link to patch
4788                                 $patchno++;
4789                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4790                                               "patch") .
4791                                       " | ";
4792                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4793                                 # "commit" view and modified file (not onlu mode changed)
4794                                 print $cgi->a({-href => href(action=>"blobdiff",
4795                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4796                                                              hash_base=>$hash, hash_parent_base=>$parent,
4797                                                              file_name=>$diff->{'file'})},
4798                                               "diff") .
4799                                       " | ";
4800                         }
4801                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4802                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4803                                        "blob") . " | ";
4804                         if ($have_blame) {
4805                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4806                                                              file_name=>$diff->{'file'})},
4807                                               "blame") . " | ";
4808                         }
4809                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4810                                                      file_name=>$diff->{'file'})},
4811                                       "history");
4812                         print "</td>\n";
4813
4814                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4815                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4816                         my $nstatus = $status_name{$diff->{'status'}};
4817                         my $mode_chng = "";
4818                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4819                                 # mode also for directories, so we cannot use $to_mode_str
4820                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4821                         }
4822                         print "<td>" .
4823                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4824                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4825                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4826                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4827                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4828                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4829                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4830                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4831                               "<td class=\"link\">";
4832                         if ($action eq 'commitdiff') {
4833                                 # link to patch
4834                                 $patchno++;
4835                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4836                                               "patch") .
4837                                       " | ";
4838                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4839                                 # "commit" view and modified file (not only pure rename or copy)
4840                                 print $cgi->a({-href => href(action=>"blobdiff",
4841                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4842                                                              hash_base=>$hash, hash_parent_base=>$parent,
4843                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4844                                               "diff") .
4845                                       " | ";
4846                         }
4847                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4848                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4849                                       "blob") . " | ";
4850                         if ($have_blame) {
4851                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4852                                                              file_name=>$diff->{'to_file'})},
4853                                               "blame") . " | ";
4854                         }
4855                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4856                                                     file_name=>$diff->{'to_file'})},
4857                                       "history");
4858                         print "</td>\n";
4859
4860                 } # we should not encounter Unmerged (U) or Unknown (X) status
4861                 print "</tr>\n";
4862         }
4863         print "</tbody>" if $has_header;
4864         print "</table>\n";
4865 }
4866
4867 sub print_sidebyside_diff_chunk {
4868         my @chunk = @_;
4869         my (@ctx, @rem, @add);
4870
4871         return unless @chunk;
4872
4873         # incomplete last line might be among removed or added lines,
4874         # or both, or among context lines: find which
4875         for (my $i = 1; $i < @chunk; $i++) {
4876                 if ($chunk[$i][0] eq 'incomplete') {
4877                         $chunk[$i][0] = $chunk[$i-1][0];
4878                 }
4879         }
4880
4881         # guardian
4882         push @chunk, ["", ""];
4883
4884         foreach my $line_info (@chunk) {
4885                 my ($class, $line) = @$line_info;
4886
4887                 # print chunk headers
4888                 if ($class && $class eq 'chunk_header') {
4889                         print $line;
4890                         next;
4891                 }
4892
4893                 ## print from accumulator when type of class of lines change
4894                 # empty contents block on start rem/add block, or end of chunk
4895                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4896                         print join '',
4897                                 '<div class="chunk_block ctx">',
4898                                         '<div class="old">',
4899                                         @ctx,
4900                                         '</div>',
4901                                         '<div class="new">',
4902                                         @ctx,
4903                                         '</div>',
4904                                 '</div>';
4905                         @ctx = ();
4906                 }
4907                 # empty add/rem block on start context block, or end of chunk
4908                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4909                         if (!@add) {
4910                                 # pure removal
4911                                 print join '',
4912                                         '<div class="chunk_block rem">',
4913                                                 '<div class="old">',
4914                                                 @rem,
4915                                                 '</div>',
4916                                         '</div>';
4917                         } elsif (!@rem) {
4918                                 # pure addition
4919                                 print join '',
4920                                         '<div class="chunk_block add">',
4921                                                 '<div class="new">',
4922                                                 @add,
4923                                                 '</div>',
4924                                         '</div>';
4925                         } else {
4926                                 # assume that it is change
4927                                 print join '',
4928                                         '<div class="chunk_block chg">',
4929                                                 '<div class="old">',
4930                                                 @rem,
4931                                                 '</div>',
4932                                                 '<div class="new">',
4933                                                 @add,
4934                                                 '</div>',
4935                                         '</div>';
4936                         }
4937                         @rem = @add = ();
4938                 }
4939
4940                 ## adding lines to accumulator
4941                 # guardian value
4942                 last unless $line;
4943                 # rem, add or change
4944                 if ($class eq 'rem') {
4945                         push @rem, $line;
4946                 } elsif ($class eq 'add') {
4947                         push @add, $line;
4948                 }
4949                 # context line
4950                 if ($class eq 'ctx') {
4951                         push @ctx, $line;
4952                 }
4953         }
4954 }
4955
4956 sub git_patchset_body {
4957         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4958         my ($hash_parent) = $hash_parents[0];
4959
4960         my $is_combined = (@hash_parents > 1);
4961         my $patch_idx = 0;
4962         my $patch_number = 0;
4963         my $patch_line;
4964         my $diffinfo;
4965         my $to_name;
4966         my (%from, %to);
4967         my @chunk; # for side-by-side diff
4968
4969         print "<div class=\"patchset\">\n";
4970
4971         # skip to first patch
4972         while ($patch_line = <$fd>) {
4973                 chomp $patch_line;
4974
4975                 last if ($patch_line =~ m/^diff /);
4976         }
4977
4978  PATCH:
4979         while ($patch_line) {
4980
4981                 # parse "git diff" header line
4982                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4983                         # $1 is from_name, which we do not use
4984                         $to_name = unquote($2);
4985                         $to_name =~ s!^b/!!;
4986                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4987                         # $1 is 'cc' or 'combined', which we do not use
4988                         $to_name = unquote($2);
4989                 } else {
4990                         $to_name = undef;
4991                 }
4992
4993                 # check if current patch belong to current raw line
4994                 # and parse raw git-diff line if needed
4995                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4996                         # this is continuation of a split patch
4997                         print "<div class=\"patch cont\">\n";
4998                 } else {
4999                         # advance raw git-diff output if needed
5000                         $patch_idx++ if defined $diffinfo;
5001
5002                         # read and prepare patch information
5003                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5004
5005                         # compact combined diff output can have some patches skipped
5006                         # find which patch (using pathname of result) we are at now;
5007                         if ($is_combined) {
5008                                 while ($to_name ne $diffinfo->{'to_file'}) {
5009                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5010                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5011                                               "</div>\n";  # class="patch"
5012
5013                                         $patch_idx++;
5014                                         $patch_number++;
5015
5016                                         last if $patch_idx > $#$difftree;
5017                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5018                                 }
5019                         }
5020
5021                         # modifies %from, %to hashes
5022                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5023
5024                         # this is first patch for raw difftree line with $patch_idx index
5025                         # we index @$difftree array from 0, but number patches from 1
5026                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5027                 }
5028
5029                 # git diff header
5030                 #assert($patch_line =~ m/^diff /) if DEBUG;
5031                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5032                 $patch_number++;
5033                 # print "git diff" header
5034                 print format_git_diff_header_line($patch_line, $diffinfo,
5035                                                   \%from, \%to);
5036
5037                 # print extended diff header
5038                 print "<div class=\"diff extended_header\">\n";
5039         EXTENDED_HEADER:
5040                 while ($patch_line = <$fd>) {
5041                         chomp $patch_line;
5042
5043                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5044
5045                         print format_extended_diff_header_line($patch_line, $diffinfo,
5046                                                                \%from, \%to);
5047                 }
5048                 print "</div>\n"; # class="diff extended_header"
5049
5050                 # from-file/to-file diff header
5051                 if (! $patch_line) {
5052                         print "</div>\n"; # class="patch"
5053                         last PATCH;
5054                 }
5055                 next PATCH if ($patch_line =~ m/^diff /);
5056                 #assert($patch_line =~ m/^---/) if DEBUG;
5057
5058                 my $last_patch_line = $patch_line;
5059                 $patch_line = <$fd>;
5060                 chomp $patch_line;
5061                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5062
5063                 print format_diff_from_to_header($last_patch_line, $patch_line,
5064                                                  $diffinfo, \%from, \%to,
5065                                                  @hash_parents);
5066
5067                 # the patch itself
5068         LINE:
5069                 while ($patch_line = <$fd>) {
5070                         chomp $patch_line;
5071
5072                         next PATCH if ($patch_line =~ m/^diff /);
5073
5074                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5075                         my $diff_classes = "diff";
5076                         $diff_classes .= " $class" if ($class);
5077                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5078
5079                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5080                                 if ($class eq 'chunk_header') {
5081                                         print_sidebyside_diff_chunk(@chunk);
5082                                         @chunk = ( [ $class, $line ] );
5083                                 } else {
5084                                         push @chunk, [ $class, $line ];
5085                                 }
5086                         } else {
5087                                 # default 'inline' style and unknown styles
5088                                 print $line;
5089                         }
5090                 }
5091
5092         } continue {
5093                 if (@chunk) {
5094                         print_sidebyside_diff_chunk(@chunk);
5095                         @chunk = ();
5096                 }
5097                 print "</div>\n"; # class="patch"
5098         }
5099
5100         # for compact combined (--cc) format, with chunk and patch simplification
5101         # the patchset might be empty, but there might be unprocessed raw lines
5102         for (++$patch_idx if $patch_number > 0;
5103              $patch_idx < @$difftree;
5104              ++$patch_idx) {
5105                 # read and prepare patch information
5106                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5107
5108                 # generate anchor for "patch" links in difftree / whatchanged part
5109                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5110                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5111                       "</div>\n";  # class="patch"
5112
5113                 $patch_number++;
5114         }
5115
5116         if ($patch_number == 0) {
5117                 if (@hash_parents > 1) {
5118                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5119                 } else {
5120                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5121                 }
5122         }
5123
5124         print "</div>\n"; # class="patchset"
5125 }
5126
5127 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5128
5129 # fills project list info (age, description, owner, category, forks)
5130 # for each project in the list, removing invalid projects from
5131 # returned list
5132 # NOTE: modifies $projlist, but does not remove entries from it
5133 sub fill_project_list_info {
5134         my $projlist = shift;
5135         my @projects;
5136
5137         my $show_ctags = gitweb_check_feature('ctags');
5138  PROJECT:
5139         foreach my $pr (@$projlist) {
5140                 my (@activity) = git_get_last_activity($pr->{'path'});
5141                 unless (@activity) {
5142                         next PROJECT;
5143                 }
5144                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5145                 if (!defined $pr->{'descr'}) {
5146                         my $descr = git_get_project_description($pr->{'path'}) || "";
5147                         $descr = to_utf8($descr);
5148                         $pr->{'descr_long'} = $descr;
5149                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5150                 }
5151                 if (!defined $pr->{'owner'}) {
5152                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5153                 }
5154                 if ($show_ctags) {
5155                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5156                 }
5157                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5158                         my $cat = git_get_project_category($pr->{'path'}) ||
5159                                                            $project_list_default_category;
5160                         $pr->{'category'} = to_utf8($cat);
5161                 }
5162
5163                 push @projects, $pr;
5164         }
5165
5166         return @projects;
5167 }
5168
5169 sub sort_projects_list {
5170         my ($projlist, $order) = @_;
5171         my @projects;
5172
5173         my %order_info = (
5174                 project => { key => 'path', type => 'str' },
5175                 descr => { key => 'descr_long', type => 'str' },
5176                 owner => { key => 'owner', type => 'str' },
5177                 age => { key => 'age', type => 'num' }
5178         );
5179         my $oi = $order_info{$order};
5180         return @$projlist unless defined $oi;
5181         if ($oi->{'type'} eq 'str') {
5182                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5183         } else {
5184                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5185         }
5186
5187         return @projects;
5188 }
5189
5190 # returns a hash of categories, containing the list of project
5191 # belonging to each category
5192 sub build_projlist_by_category {
5193         my ($projlist, $from, $to) = @_;
5194         my %categories;
5195
5196         $from = 0 unless defined $from;
5197         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5198
5199         for (my $i = $from; $i <= $to; $i++) {
5200                 my $pr = $projlist->[$i];
5201                 push @{$categories{ $pr->{'category'} }}, $pr;
5202         }
5203
5204         return wantarray ? %categories : \%categories;
5205 }
5206
5207 # print 'sort by' <th> element, generating 'sort by $name' replay link
5208 # if that order is not selected
5209 sub print_sort_th {
5210         print format_sort_th(@_);
5211 }
5212
5213 sub format_sort_th {
5214         my ($name, $order, $header) = @_;
5215         my $sort_th = "";
5216         $header ||= ucfirst($name);
5217
5218         if ($order eq $name) {
5219                 $sort_th .= "<th>$header</th>\n";
5220         } else {
5221                 $sort_th .= "<th>" .
5222                             $cgi->a({-href => href(-replay=>1, order=>$name),
5223                                      -class => "header"}, $header) .
5224                             "</th>\n";
5225         }
5226
5227         return $sort_th;
5228 }
5229
5230 sub git_project_list_rows {
5231         my ($projlist, $from, $to, $check_forks) = @_;
5232
5233         $from = 0 unless defined $from;
5234         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5235
5236         my $alternate = 1;
5237         for (my $i = $from; $i <= $to; $i++) {
5238                 my $pr = $projlist->[$i];
5239
5240                 if ($alternate) {
5241                         print "<tr class=\"dark\">\n";
5242                 } else {
5243                         print "<tr class=\"light\">\n";
5244                 }
5245                 $alternate ^= 1;
5246
5247                 if ($check_forks) {
5248                         print "<td>";
5249                         if ($pr->{'forks'}) {
5250                                 my $nforks = scalar @{$pr->{'forks'}};
5251                                 if ($nforks > 0) {
5252                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5253                                                        -title => "$nforks forks"}, "+");
5254                                 } else {
5255                                         print $cgi->span({-title => "$nforks forks"}, "+");
5256                                 }
5257                         }
5258                         print "</td>\n";
5259                 }
5260                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5261                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5262                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5263                                         -class => "list", -title => $pr->{'descr_long'}},
5264                                         esc_html($pr->{'descr'})) . "</td>\n" .
5265                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5266                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5267                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5268                       "<td class=\"link\">" .
5269                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5270                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5271                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5272                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5273                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5274                       "</td>\n" .
5275                       "</tr>\n";
5276         }
5277 }
5278
5279 sub git_project_list_body {
5280         # actually uses global variable $project
5281         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5282         my @projects = @$projlist;
5283
5284         my $check_forks = gitweb_check_feature('forks');
5285         my $show_ctags  = gitweb_check_feature('ctags');
5286         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5287         $check_forks = undef
5288                 if ($tagfilter || $searchtext);
5289
5290         # filtering out forks before filling info allows to do less work
5291         @projects = filter_forks_from_projects_list(\@projects)
5292                 if ($check_forks);
5293         @projects = fill_project_list_info(\@projects);
5294         # searching projects require filling to be run before it
5295         @projects = search_projects_list(\@projects,
5296                                          'searchtext' => $searchtext,
5297                                          'tagfilter'  => $tagfilter)
5298                 if ($tagfilter || $searchtext);
5299
5300         $order ||= $default_projects_order;
5301         $from = 0 unless defined $from;
5302         $to = $#projects if (!defined $to || $#projects < $to);
5303
5304         # short circuit
5305         if ($from > $to) {
5306                 print "<center>\n".
5307                       "<b>No such projects found</b><br />\n".
5308                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5309                       "</center>\n<br />\n";
5310                 return;
5311         }
5312
5313         @projects = sort_projects_list(\@projects, $order);
5314
5315         if ($show_ctags) {
5316                 my $ctags = git_gather_all_ctags(\@projects);
5317                 my $cloud = git_populate_project_tagcloud($ctags);
5318                 print git_show_project_tagcloud($cloud, 64);
5319         }
5320
5321         print "<table class=\"project_list\">\n";
5322         unless ($no_header) {
5323                 print "<tr>\n";
5324                 if ($check_forks) {
5325                         print "<th></th>\n";
5326                 }
5327                 print_sort_th('project', $order, 'Project');
5328                 print_sort_th('descr', $order, 'Description');
5329                 print_sort_th('owner', $order, 'Owner');
5330                 print_sort_th('age', $order, 'Last Change');
5331                 print "<th></th>\n" . # for links
5332                       "</tr>\n";
5333         }
5334
5335         if ($projects_list_group_categories) {
5336                 # only display categories with projects in the $from-$to window
5337                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5338                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5339                 foreach my $cat (sort keys %categories) {
5340                         unless ($cat eq "") {
5341                                 print "<tr>\n";
5342                                 if ($check_forks) {
5343                                         print "<td></td>\n";
5344                                 }
5345                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5346                                 print "</tr>\n";
5347                         }
5348
5349                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5350                 }
5351         } else {
5352                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5353         }
5354
5355         if (defined $extra) {
5356                 print "<tr>\n";
5357                 if ($check_forks) {
5358                         print "<td></td>\n";
5359                 }
5360                 print "<td colspan=\"5\">$extra</td>\n" .
5361                       "</tr>\n";
5362         }
5363         print "</table>\n";
5364 }
5365
5366 sub git_log_body {
5367         # uses global variable $project
5368         my ($commitlist, $from, $to, $refs, $extra) = @_;
5369
5370         $from = 0 unless defined $from;
5371         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5372
5373         for (my $i = 0; $i <= $to; $i++) {
5374                 my %co = %{$commitlist->[$i]};
5375                 next if !%co;
5376                 my $commit = $co{'id'};
5377                 my $ref = format_ref_marker($refs, $commit);
5378                 git_print_header_div('commit',
5379                                "<span class=\"age\">$co{'age_string'}</span>" .
5380                                esc_html($co{'title'}) . $ref,
5381                                $commit);
5382                 print "<div class=\"title_text\">\n" .
5383                       "<div class=\"log_link\">\n" .
5384                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5385                       " | " .
5386                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5387                       " | " .
5388                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5389                       "<br/>\n" .
5390                       "</div>\n";
5391                       git_print_authorship(\%co, -tag => 'span');
5392                       print "<br/>\n</div>\n";
5393
5394                 print "<div class=\"log_body\">\n";
5395                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5396                 print "</div>\n";
5397         }
5398         if ($extra) {
5399                 print "<div class=\"page_nav\">\n";
5400                 print "$extra\n";
5401                 print "</div>\n";
5402         }
5403 }
5404
5405 sub git_shortlog_body {
5406         # uses global variable $project
5407         my ($commitlist, $from, $to, $refs, $extra) = @_;
5408
5409         $from = 0 unless defined $from;
5410         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5411
5412         print "<table class=\"shortlog\">\n";
5413         my $alternate = 1;
5414         for (my $i = $from; $i <= $to; $i++) {
5415                 my %co = %{$commitlist->[$i]};
5416                 my $commit = $co{'id'};
5417                 my $ref = format_ref_marker($refs, $commit);
5418                 if ($alternate) {
5419                         print "<tr class=\"dark\">\n";
5420                 } else {
5421                         print "<tr class=\"light\">\n";
5422                 }
5423                 $alternate ^= 1;
5424                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5425                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5426                       format_author_html('td', \%co, 10) . "<td>";
5427                 print format_subject_html($co{'title'}, $co{'title_short'},
5428                                           href(action=>"commit", hash=>$commit), $ref);
5429                 print "</td>\n" .
5430                       "<td class=\"link\">" .
5431                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5432                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5433                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5434                 my $snapshot_links = format_snapshot_links($commit);
5435                 if (defined $snapshot_links) {
5436                         print " | " . $snapshot_links;
5437                 }
5438                 print "</td>\n" .
5439                       "</tr>\n";
5440         }
5441         if (defined $extra) {
5442                 print "<tr>\n" .
5443                       "<td colspan=\"4\">$extra</td>\n" .
5444                       "</tr>\n";
5445         }
5446         print "</table>\n";
5447 }
5448
5449 sub git_history_body {
5450         # Warning: assumes constant type (blob or tree) during history
5451         my ($commitlist, $from, $to, $refs, $extra,
5452             $file_name, $file_hash, $ftype) = @_;
5453
5454         $from = 0 unless defined $from;
5455         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5456
5457         print "<table class=\"history\">\n";
5458         my $alternate = 1;
5459         for (my $i = $from; $i <= $to; $i++) {
5460                 my %co = %{$commitlist->[$i]};
5461                 if (!%co) {
5462                         next;
5463                 }
5464                 my $commit = $co{'id'};
5465
5466                 my $ref = format_ref_marker($refs, $commit);
5467
5468                 if ($alternate) {
5469                         print "<tr class=\"dark\">\n";
5470                 } else {
5471                         print "<tr class=\"light\">\n";
5472                 }
5473                 $alternate ^= 1;
5474                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5475         # shortlog:   format_author_html('td', \%co, 10)
5476                       format_author_html('td', \%co, 15, 3) . "<td>";
5477                 # originally git_history used chop_str($co{'title'}, 50)
5478                 print format_subject_html($co{'title'}, $co{'title_short'},
5479                                           href(action=>"commit", hash=>$commit), $ref);
5480                 print "</td>\n" .
5481                       "<td class=\"link\">" .
5482                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5483                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5484
5485                 if ($ftype eq 'blob') {
5486                         my $blob_current = $file_hash;
5487                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5488                         if (defined $blob_current && defined $blob_parent &&
5489                                         $blob_current ne $blob_parent) {
5490                                 print " | " .
5491                                         $cgi->a({-href => href(action=>"blobdiff",
5492                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5493                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5494                                                                file_name=>$file_name)},
5495                                                 "diff to current");
5496                         }
5497                 }
5498                 print "</td>\n" .
5499                       "</tr>\n";
5500         }
5501         if (defined $extra) {
5502                 print "<tr>\n" .
5503                       "<td colspan=\"4\">$extra</td>\n" .
5504                       "</tr>\n";
5505         }
5506         print "</table>\n";
5507 }
5508
5509 sub git_tags_body {
5510         # uses global variable $project
5511         my ($taglist, $from, $to, $extra) = @_;
5512         $from = 0 unless defined $from;
5513         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5514
5515         print "<table class=\"tags\">\n";
5516         my $alternate = 1;
5517         for (my $i = $from; $i <= $to; $i++) {
5518                 my $entry = $taglist->[$i];
5519                 my %tag = %$entry;
5520                 my $comment = $tag{'subject'};
5521                 my $comment_short;
5522                 if (defined $comment) {
5523                         $comment_short = chop_str($comment, 30, 5);
5524                 }
5525                 if ($alternate) {
5526                         print "<tr class=\"dark\">\n";
5527                 } else {
5528                         print "<tr class=\"light\">\n";
5529                 }
5530                 $alternate ^= 1;
5531                 if (defined $tag{'age'}) {
5532                         print "<td><i>$tag{'age'}</i></td>\n";
5533                 } else {
5534                         print "<td></td>\n";
5535                 }
5536                 print "<td>" .
5537                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5538                                -class => "list name"}, esc_html($tag{'name'})) .
5539                       "</td>\n" .
5540                       "<td>";
5541                 if (defined $comment) {
5542                         print format_subject_html($comment, $comment_short,
5543                                                   href(action=>"tag", hash=>$tag{'id'}));
5544                 }
5545                 print "</td>\n" .
5546                       "<td class=\"selflink\">";
5547                 if ($tag{'type'} eq "tag") {
5548                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5549                 } else {
5550                         print "&nbsp;";
5551                 }
5552                 print "</td>\n" .
5553                       "<td class=\"link\">" . " | " .
5554                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5555                 if ($tag{'reftype'} eq "commit") {
5556                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5557                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5558                 } elsif ($tag{'reftype'} eq "blob") {
5559                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5560                 }
5561                 print "</td>\n" .
5562                       "</tr>";
5563         }
5564         if (defined $extra) {
5565                 print "<tr>\n" .
5566                       "<td colspan=\"5\">$extra</td>\n" .
5567                       "</tr>\n";
5568         }
5569         print "</table>\n";
5570 }
5571
5572 sub git_heads_body {
5573         # uses global variable $project
5574         my ($headlist, $head, $from, $to, $extra) = @_;
5575         $from = 0 unless defined $from;
5576         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5577
5578         print "<table class=\"heads\">\n";
5579         my $alternate = 1;
5580         for (my $i = $from; $i <= $to; $i++) {
5581                 my $entry = $headlist->[$i];
5582                 my %ref = %$entry;
5583                 my $curr = $ref{'id'} eq $head;
5584                 if ($alternate) {
5585                         print "<tr class=\"dark\">\n";
5586                 } else {
5587                         print "<tr class=\"light\">\n";
5588                 }
5589                 $alternate ^= 1;
5590                 print "<td><i>$ref{'age'}</i></td>\n" .
5591                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5592                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5593                                -class => "list name"},esc_html($ref{'name'})) .
5594                       "</td>\n" .
5595                       "<td class=\"link\">" .
5596                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5597                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5598                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5599                       "</td>\n" .
5600                       "</tr>";
5601         }
5602         if (defined $extra) {
5603                 print "<tr>\n" .
5604                       "<td colspan=\"3\">$extra</td>\n" .
5605                       "</tr>\n";
5606         }
5607         print "</table>\n";
5608 }
5609
5610 # Display a single remote block
5611 sub git_remote_block {
5612         my ($remote, $rdata, $limit, $head) = @_;
5613
5614         my $heads = $rdata->{'heads'};
5615         my $fetch = $rdata->{'fetch'};
5616         my $push = $rdata->{'push'};
5617
5618         my $urls_table = "<table class=\"projects_list\">\n" ;
5619
5620         if (defined $fetch) {
5621                 if ($fetch eq $push) {
5622                         $urls_table .= format_repo_url("URL", $fetch);
5623                 } else {
5624                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5625                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5626                 }
5627         } elsif (defined $push) {
5628                 $urls_table .= format_repo_url("Push URL", $push);
5629         } else {
5630                 $urls_table .= format_repo_url("", "No remote URL");
5631         }
5632
5633         $urls_table .= "</table>\n";
5634
5635         my $dots;
5636         if (defined $limit && $limit < @$heads) {
5637                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5638         }
5639
5640         print $urls_table;
5641         git_heads_body($heads, $head, 0, $limit, $dots);
5642 }
5643
5644 # Display a list of remote names with the respective fetch and push URLs
5645 sub git_remotes_list {
5646         my ($remotedata, $limit) = @_;
5647         print "<table class=\"heads\">\n";
5648         my $alternate = 1;
5649         my @remotes = sort keys %$remotedata;
5650
5651         my $limited = $limit && $limit < @remotes;
5652
5653         $#remotes = $limit - 1 if $limited;
5654
5655         while (my $remote = shift @remotes) {
5656                 my $rdata = $remotedata->{$remote};
5657                 my $fetch = $rdata->{'fetch'};
5658                 my $push = $rdata->{'push'};
5659                 if ($alternate) {
5660                         print "<tr class=\"dark\">\n";
5661                 } else {
5662                         print "<tr class=\"light\">\n";
5663                 }
5664                 $alternate ^= 1;
5665                 print "<td>" .
5666                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5667                                -class=> "list name"},esc_html($remote)) .
5668                       "</td>";
5669                 print "<td class=\"link\">" .
5670                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5671                       " | " .
5672                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5673                       "</td>";
5674
5675                 print "</tr>\n";
5676         }
5677
5678         if ($limited) {
5679                 print "<tr>\n" .
5680                       "<td colspan=\"3\">" .
5681                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5682                       "</td>\n" . "</tr>\n";
5683         }
5684
5685         print "</table>";
5686 }
5687
5688 # Display remote heads grouped by remote, unless there are too many
5689 # remotes, in which case we only display the remote names
5690 sub git_remotes_body {
5691         my ($remotedata, $limit, $head) = @_;
5692         if ($limit and $limit < keys %$remotedata) {
5693                 git_remotes_list($remotedata, $limit);
5694         } else {
5695                 fill_remote_heads($remotedata);
5696                 while (my ($remote, $rdata) = each %$remotedata) {
5697                         git_print_section({-class=>"remote", -id=>$remote},
5698                                 ["remotes", $remote, $remote], sub {
5699                                         git_remote_block($remote, $rdata, $limit, $head);
5700                                 });
5701                 }
5702         }
5703 }
5704
5705 sub git_search_message {
5706         my %co = @_;
5707
5708         my $greptype;
5709         if ($searchtype eq 'commit') {
5710                 $greptype = "--grep=";
5711         } elsif ($searchtype eq 'author') {
5712                 $greptype = "--author=";
5713         } elsif ($searchtype eq 'committer') {
5714                 $greptype = "--committer=";
5715         }
5716         $greptype .= $searchtext;
5717         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5718                                        $greptype, '--regexp-ignore-case',
5719                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5720
5721         my $paging_nav = '';
5722         if ($page > 0) {
5723                 $paging_nav .=
5724                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5725                                 "first") .
5726                         " &sdot; " .
5727                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5728                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5729         } else {
5730                 $paging_nav .= "first &sdot; prev";
5731         }
5732         my $next_link = '';
5733         if ($#commitlist >= 100) {
5734                 $next_link =
5735                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5736                                  -accesskey => "n", -title => "Alt-n"}, "next");
5737                 $paging_nav .= " &sdot; $next_link";
5738         } else {
5739                 $paging_nav .= " &sdot; next";
5740         }
5741
5742         git_header_html();
5743
5744         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5745         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5746         if ($page == 0 && !@commitlist) {
5747                 print "<p>No match.</p>\n";
5748         } else {
5749                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5750         }
5751
5752         git_footer_html();
5753 }
5754
5755 sub git_search_changes {
5756         my %co = @_;
5757
5758         local $/ = "\n";
5759         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5760                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5761                 ($search_use_regexp ? '--pickaxe-regex' : ())
5762                         or die_error(500, "Open git-log failed");
5763
5764         git_header_html();
5765
5766         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5767         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5768
5769         print "<table class=\"pickaxe search\">\n";
5770         my $alternate = 1;
5771         undef %co;
5772         my @files;
5773         while (my $line = <$fd>) {
5774                 chomp $line;
5775                 next unless $line;
5776
5777                 my %set = parse_difftree_raw_line($line);
5778                 if (defined $set{'commit'}) {
5779                         # finish previous commit
5780                         if (%co) {
5781                                 print "</td>\n" .
5782                                       "<td class=\"link\">" .
5783                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5784                                               "commit") .
5785                                       " | " .
5786                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5787                                                              hash_base=>$co{'id'})},
5788                                               "tree") .
5789                                       "</td>\n" .
5790                                       "</tr>\n";
5791                         }
5792
5793                         if ($alternate) {
5794                                 print "<tr class=\"dark\">\n";
5795                         } else {
5796                                 print "<tr class=\"light\">\n";
5797                         }
5798                         $alternate ^= 1;
5799                         %co = parse_commit($set{'commit'});
5800                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5801                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5802                               "<td><i>$author</i></td>\n" .
5803                               "<td>" .
5804                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5805                                       -class => "list subject"},
5806                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5807                 } elsif (defined $set{'to_id'}) {
5808                         next if ($set{'to_id'} =~ m/^0{40}$/);
5809
5810                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5811                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5812                                       -class => "list"},
5813                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5814                               "<br/>\n";
5815                 }
5816         }
5817         close $fd;
5818
5819         # finish last commit (warning: repetition!)
5820         if (%co) {
5821                 print "</td>\n" .
5822                       "<td class=\"link\">" .
5823                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5824                               "commit") .
5825                       " | " .
5826                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5827                                              hash_base=>$co{'id'})},
5828                               "tree") .
5829                       "</td>\n" .
5830                       "</tr>\n";
5831         }
5832
5833         print "</table>\n";
5834
5835         git_footer_html();
5836 }
5837
5838 sub git_search_files {
5839         my %co = @_;
5840
5841         local $/ = "\n";
5842         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5843                 $search_use_regexp ? ('-E', '-i') : '-F',
5844                 $searchtext, $co{'tree'}
5845                         or die_error(500, "Open git-grep failed");
5846
5847         git_header_html();
5848
5849         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5850         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5851
5852         print "<table class=\"grep_search\">\n";
5853         my $alternate = 1;
5854         my $matches = 0;
5855         my $lastfile = '';
5856         while (my $line = <$fd>) {
5857                 chomp $line;
5858                 my ($file, $file_href, $lno, $ltext, $binary);
5859                 last if ($matches++ > 1000);
5860                 if ($line =~ /^Binary file (.+) matches$/) {
5861                         $file = $1;
5862                         $binary = 1;
5863                 } else {
5864                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5865                         $file =~ s/^$co{'tree'}://;
5866                 }
5867                 if ($file ne $lastfile) {
5868                         $lastfile and print "</td></tr>\n";
5869                         if ($alternate++) {
5870                                 print "<tr class=\"dark\">\n";
5871                         } else {
5872                                 print "<tr class=\"light\">\n";
5873                         }
5874                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5875                                           file_name=>$file);
5876                         print "<td class=\"list\">".
5877                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5878                         print "</td><td>\n";
5879                         $lastfile = $file;
5880                 }
5881                 if ($binary) {
5882                         print "<div class=\"binary\">Binary file</div>\n";
5883                 } else {
5884                         $ltext = untabify($ltext);
5885                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5886                                 $ltext = esc_html($1, -nbsp=>1);
5887                                 $ltext .= '<span class="match">';
5888                                 $ltext .= esc_html($2, -nbsp=>1);
5889                                 $ltext .= '</span>';
5890                                 $ltext .= esc_html($3, -nbsp=>1);
5891                         } else {
5892                                 $ltext = esc_html($ltext, -nbsp=>1);
5893                         }
5894                         print "<div class=\"pre\">" .
5895                                 $cgi->a({-href => $file_href.'#l'.$lno,
5896                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5897                                 ' ' .  $ltext . "</div>\n";
5898                 }
5899         }
5900         if ($lastfile) {
5901                 print "</td></tr>\n";
5902                 if ($matches > 1000) {
5903                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5904                 }
5905         } else {
5906                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5907         }
5908         close $fd;
5909
5910         print "</table>\n";
5911
5912         git_footer_html();
5913 }
5914
5915 sub git_search_grep_body {
5916         my ($commitlist, $from, $to, $extra) = @_;
5917         $from = 0 unless defined $from;
5918         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5919
5920         print "<table class=\"commit_search\">\n";
5921         my $alternate = 1;
5922         for (my $i = $from; $i <= $to; $i++) {
5923                 my %co = %{$commitlist->[$i]};
5924                 if (!%co) {
5925                         next;
5926                 }
5927                 my $commit = $co{'id'};
5928                 if ($alternate) {
5929                         print "<tr class=\"dark\">\n";
5930                 } else {
5931                         print "<tr class=\"light\">\n";
5932                 }
5933                 $alternate ^= 1;
5934                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5935                       format_author_html('td', \%co, 15, 5) .
5936                       "<td>" .
5937                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5938                                -class => "list subject"},
5939                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5940                 my $comment = $co{'comment'};
5941                 foreach my $line (@$comment) {
5942                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5943                                 my ($lead, $match, $trail) = ($1, $2, $3);
5944                                 $match = chop_str($match, 70, 5, 'center');
5945                                 my $contextlen = int((80 - length($match))/2);
5946                                 $contextlen = 30 if ($contextlen > 30);
5947                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5948                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5949
5950                                 $lead  = esc_html($lead);
5951                                 $match = esc_html($match);
5952                                 $trail = esc_html($trail);
5953
5954                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5955                         }
5956                 }
5957                 print "</td>\n" .
5958                       "<td class=\"link\">" .
5959                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5960                       " | " .
5961                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5962                       " | " .
5963                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5964                 print "</td>\n" .
5965                       "</tr>\n";
5966         }
5967         if (defined $extra) {
5968                 print "<tr>\n" .
5969                       "<td colspan=\"3\">$extra</td>\n" .
5970                       "</tr>\n";
5971         }
5972         print "</table>\n";
5973 }
5974
5975 ## ======================================================================
5976 ## ======================================================================
5977 ## actions
5978
5979 sub git_project_list {
5980         my $order = $input_params{'order'};
5981         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5982                 die_error(400, "Unknown order parameter");
5983         }
5984
5985         my @list = git_get_projects_list();
5986         if (!@list) {
5987                 die_error(404, "No projects found");
5988         }
5989
5990         git_header_html();
5991         if (defined $home_text && -f $home_text) {
5992                 print "<div class=\"index_include\">\n";
5993                 insert_file($home_text);
5994                 print "</div>\n";
5995         }
5996         print $cgi->startform(-method => "get") .
5997               "<p class=\"projsearch\">Search:\n" .
5998               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5999               "</p>" .
6000               $cgi->end_form() . "\n";
6001         git_project_list_body(\@list, $order);
6002         git_footer_html();
6003 }
6004
6005 sub git_forks {
6006         my $order = $input_params{'order'};
6007         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6008                 die_error(400, "Unknown order parameter");
6009         }
6010
6011         my @list = git_get_projects_list($project);
6012         if (!@list) {
6013                 die_error(404, "No forks found");
6014         }
6015
6016         git_header_html();
6017         git_print_page_nav('','');
6018         git_print_header_div('summary', "$project forks");
6019         git_project_list_body(\@list, $order);
6020         git_footer_html();
6021 }
6022
6023 sub git_project_index {
6024         my @projects = git_get_projects_list();
6025         if (!@projects) {
6026                 die_error(404, "No projects found");
6027         }
6028
6029         print $cgi->header(
6030                 -type => 'text/plain',
6031                 -charset => 'utf-8',
6032                 -content_disposition => 'inline; filename="index.aux"');
6033
6034         foreach my $pr (@projects) {
6035                 if (!exists $pr->{'owner'}) {
6036                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6037                 }
6038
6039                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6040                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6041                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6042                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6043                 $path  =~ s/ /\+/g;
6044                 $owner =~ s/ /\+/g;
6045
6046                 print "$path $owner\n";
6047         }
6048 }
6049
6050 sub git_summary {
6051         my $descr = git_get_project_description($project) || "none";
6052         my %co = parse_commit("HEAD");
6053         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6054         my $head = $co{'id'};
6055         my $remote_heads = gitweb_check_feature('remote_heads');
6056
6057         my $owner = git_get_project_owner($project);
6058
6059         my $refs = git_get_references();
6060         # These get_*_list functions return one more to allow us to see if
6061         # there are more ...
6062         my @taglist  = git_get_tags_list(16);
6063         my @headlist = git_get_heads_list(16);
6064         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6065         my @forklist;
6066         my $check_forks = gitweb_check_feature('forks');
6067
6068         if ($check_forks) {
6069                 # find forks of a project
6070                 @forklist = git_get_projects_list($project);
6071                 # filter out forks of forks
6072                 @forklist = filter_forks_from_projects_list(\@forklist)
6073                         if (@forklist);
6074         }
6075
6076         git_header_html();
6077         git_print_page_nav('summary','', $head);
6078
6079         print "<div class=\"title\">&nbsp;</div>\n";
6080         print "<table class=\"projects_list\">\n" .
6081               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6082               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6083         if (defined $cd{'rfc2822'}) {
6084                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6085                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6086         }
6087
6088         # use per project git URL list in $projectroot/$project/cloneurl
6089         # or make project git URL from git base URL and project name
6090         my $url_tag = "URL";
6091         my @url_list = git_get_project_url_list($project);
6092         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6093         foreach my $git_url (@url_list) {
6094                 next unless $git_url;
6095                 print format_repo_url($url_tag, $git_url);
6096                 $url_tag = "";
6097         }
6098
6099         # Tag cloud
6100         my $show_ctags = gitweb_check_feature('ctags');
6101         if ($show_ctags) {
6102                 my $ctags = git_get_project_ctags($project);
6103                 if (%$ctags) {
6104                         # without ability to add tags, don't show if there are none
6105                         my $cloud = git_populate_project_tagcloud($ctags);
6106                         print "<tr id=\"metadata_ctags\">" .
6107                               "<td>content tags</td>" .
6108                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6109                               "</tr>\n";
6110                 }
6111         }
6112
6113         print "</table>\n";
6114
6115         # If XSS prevention is on, we don't include README.html.
6116         # TODO: Allow a readme in some safe format.
6117         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6118                 print "<div class=\"title\">readme</div>\n" .
6119                       "<div class=\"readme\">\n";
6120                 insert_file("$projectroot/$project/README.html");
6121                 print "\n</div>\n"; # class="readme"
6122         }
6123
6124         # we need to request one more than 16 (0..15) to check if
6125         # those 16 are all
6126         my @commitlist = $head ? parse_commits($head, 17) : ();
6127         if (@commitlist) {
6128                 git_print_header_div('shortlog');
6129                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6130                                   $#commitlist <=  15 ? undef :
6131                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6132         }
6133
6134         if (@taglist) {
6135                 git_print_header_div('tags');
6136                 git_tags_body(\@taglist, 0, 15,
6137                               $#taglist <=  15 ? undef :
6138                               $cgi->a({-href => href(action=>"tags")}, "..."));
6139         }
6140
6141         if (@headlist) {
6142                 git_print_header_div('heads');
6143                 git_heads_body(\@headlist, $head, 0, 15,
6144                                $#headlist <= 15 ? undef :
6145                                $cgi->a({-href => href(action=>"heads")}, "..."));
6146         }
6147
6148         if (%remotedata) {
6149                 git_print_header_div('remotes');
6150                 git_remotes_body(\%remotedata, 15, $head);
6151         }
6152
6153         if (@forklist) {
6154                 git_print_header_div('forks');
6155                 git_project_list_body(\@forklist, 'age', 0, 15,
6156                                       $#forklist <= 15 ? undef :
6157                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6158                                       'no_header');
6159         }
6160
6161         git_footer_html();
6162 }
6163
6164 sub git_tag {
6165         my %tag = parse_tag($hash);
6166
6167         if (! %tag) {
6168                 die_error(404, "Unknown tag object");
6169         }
6170
6171         my $head = git_get_head_hash($project);
6172         git_header_html();
6173         git_print_page_nav('','', $head,undef,$head);
6174         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6175         print "<div class=\"title_text\">\n" .
6176               "<table class=\"object_header\">\n" .
6177               "<tr>\n" .
6178               "<td>object</td>\n" .
6179               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6180                                $tag{'object'}) . "</td>\n" .
6181               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6182                                               $tag{'type'}) . "</td>\n" .
6183               "</tr>\n";
6184         if (defined($tag{'author'})) {
6185                 git_print_authorship_rows(\%tag, 'author');
6186         }
6187         print "</table>\n\n" .
6188               "</div>\n";
6189         print "<div class=\"page_body\">";
6190         my $comment = $tag{'comment'};
6191         foreach my $line (@$comment) {
6192                 chomp $line;
6193                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6194         }
6195         print "</div>\n";
6196         git_footer_html();
6197 }
6198
6199 sub git_blame_common {
6200         my $format = shift || 'porcelain';
6201         if ($format eq 'porcelain' && $cgi->param('js')) {
6202                 $format = 'incremental';
6203                 $action = 'blame_incremental'; # for page title etc
6204         }
6205
6206         # permissions
6207         gitweb_check_feature('blame')
6208                 or die_error(403, "Blame view not allowed");
6209
6210         # error checking
6211         die_error(400, "No file name given") unless $file_name;
6212         $hash_base ||= git_get_head_hash($project);
6213         die_error(404, "Couldn't find base commit") unless $hash_base;
6214         my %co = parse_commit($hash_base)
6215                 or die_error(404, "Commit not found");
6216         my $ftype = "blob";
6217         if (!defined $hash) {
6218                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6219                         or die_error(404, "Error looking up file");
6220         } else {
6221                 $ftype = git_get_type($hash);
6222                 if ($ftype !~ "blob") {
6223                         die_error(400, "Object is not a blob");
6224                 }
6225         }
6226
6227         my $fd;
6228         if ($format eq 'incremental') {
6229                 # get file contents (as base)
6230                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6231                         or die_error(500, "Open git-cat-file failed");
6232         } elsif ($format eq 'data') {
6233                 # run git-blame --incremental
6234                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6235                         $hash_base, "--", $file_name
6236                         or die_error(500, "Open git-blame --incremental failed");
6237         } else {
6238                 # run git-blame --porcelain
6239                 open $fd, "-|", git_cmd(), "blame", '-p',
6240                         $hash_base, '--', $file_name
6241                         or die_error(500, "Open git-blame --porcelain failed");
6242         }
6243
6244         # incremental blame data returns early
6245         if ($format eq 'data') {
6246                 print $cgi->header(
6247                         -type=>"text/plain", -charset => "utf-8",
6248                         -status=> "200 OK");
6249                 local $| = 1; # output autoflush
6250                 while (my $line = <$fd>) {
6251                         print to_utf8($line);
6252                 }
6253                 close $fd
6254                         or print "ERROR $!\n";
6255
6256                 print 'END';
6257                 if (defined $t0 && gitweb_check_feature('timed')) {
6258                         print ' '.
6259                               tv_interval($t0, [ gettimeofday() ]).
6260                               ' '.$number_of_git_cmds;
6261                 }
6262                 print "\n";
6263
6264                 return;
6265         }
6266
6267         # page header
6268         git_header_html();
6269         my $formats_nav =
6270                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6271                         "blob") .
6272                 " | ";
6273         if ($format eq 'incremental') {
6274                 $formats_nav .=
6275                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6276                                 "blame") . " (non-incremental)";
6277         } else {
6278                 $formats_nav .=
6279                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6280                                 "blame") . " (incremental)";
6281         }
6282         $formats_nav .=
6283                 " | " .
6284                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6285                         "history") .
6286                 " | " .
6287                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6288                         "HEAD");
6289         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6290         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6291         git_print_page_path($file_name, $ftype, $hash_base);
6292
6293         # page body
6294         if ($format eq 'incremental') {
6295                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6296                       "This page requires JavaScript to run.\n Use ".
6297                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6298                               'this page').
6299                       " instead.\n".
6300                       "</b></center></div>\n</noscript>\n";
6301
6302                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6303         }
6304
6305         print qq!<div class="page_body">\n!;
6306         print qq!<div id="progress_info">... / ...</div>\n!
6307                 if ($format eq 'incremental');
6308         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6309               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6310               qq!<thead>\n!.
6311               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6312               qq!</thead>\n!.
6313               qq!<tbody>\n!;
6314
6315         my @rev_color = qw(light dark);
6316         my $num_colors = scalar(@rev_color);
6317         my $current_color = 0;
6318
6319         if ($format eq 'incremental') {
6320                 my $color_class = $rev_color[$current_color];
6321
6322                 #contents of a file
6323                 my $linenr = 0;
6324         LINE:
6325                 while (my $line = <$fd>) {
6326                         chomp $line;
6327                         $linenr++;
6328
6329                         print qq!<tr id="l$linenr" class="$color_class">!.
6330                               qq!<td class="sha1"><a href=""> </a></td>!.
6331                               qq!<td class="linenr">!.
6332                               qq!<a class="linenr" href="">$linenr</a></td>!;
6333                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6334                         print qq!</tr>\n!;
6335                 }
6336
6337         } else { # porcelain, i.e. ordinary blame
6338                 my %metainfo = (); # saves information about commits
6339
6340                 # blame data
6341         LINE:
6342                 while (my $line = <$fd>) {
6343                         chomp $line;
6344                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6345                         # no <lines in group> for subsequent lines in group of lines
6346                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6347                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6348                         if (!exists $metainfo{$full_rev}) {
6349                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6350                         }
6351                         my $meta = $metainfo{$full_rev};
6352                         my $data;
6353                         while ($data = <$fd>) {
6354                                 chomp $data;
6355                                 last if ($data =~ s/^\t//); # contents of line
6356                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6357                                         $meta->{$1} = $2 unless exists $meta->{$1};
6358                                 }
6359                                 if ($data =~ /^previous /) {
6360                                         $meta->{'nprevious'}++;
6361                                 }
6362                         }
6363                         my $short_rev = substr($full_rev, 0, 8);
6364                         my $author = $meta->{'author'};
6365                         my %date =
6366                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6367                         my $date = $date{'iso-tz'};
6368                         if ($group_size) {
6369                                 $current_color = ($current_color + 1) % $num_colors;
6370                         }
6371                         my $tr_class = $rev_color[$current_color];
6372                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6373                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6374                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6375                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6376                         if ($group_size) {
6377                                 print "<td class=\"sha1\"";
6378                                 print " title=\"". esc_html($author) . ", $date\"";
6379                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6380                                 print ">";
6381                                 print $cgi->a({-href => href(action=>"commit",
6382                                                              hash=>$full_rev,
6383                                                              file_name=>$file_name)},
6384                                               esc_html($short_rev));
6385                                 if ($group_size >= 2) {
6386                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6387                                         if (@author_initials) {
6388                                                 print "<br />" .
6389                                                       esc_html(join('', @author_initials));
6390                                                 #           or join('.', ...)
6391                                         }
6392                                 }
6393                                 print "</td>\n";
6394                         }
6395                         # 'previous' <sha1 of parent commit> <filename at commit>
6396                         if (exists $meta->{'previous'} &&
6397                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6398                                 $meta->{'parent'} = $1;
6399                                 $meta->{'file_parent'} = unquote($2);
6400                         }
6401                         my $linenr_commit =
6402                                 exists($meta->{'parent'}) ?
6403                                 $meta->{'parent'} : $full_rev;
6404                         my $linenr_filename =
6405                                 exists($meta->{'file_parent'}) ?
6406                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6407                         my $blamed = href(action => 'blame',
6408                                           file_name => $linenr_filename,
6409                                           hash_base => $linenr_commit);
6410                         print "<td class=\"linenr\">";
6411                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6412                                         -class => "linenr" },
6413                                       esc_html($lineno));
6414                         print "</td>";
6415                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6416                         print "</tr>\n";
6417                 } # end while
6418
6419         }
6420
6421         # footer
6422         print "</tbody>\n".
6423               "</table>\n"; # class="blame"
6424         print "</div>\n";   # class="blame_body"
6425         close $fd
6426                 or print "Reading blob failed\n";
6427
6428         git_footer_html();
6429 }
6430
6431 sub git_blame {
6432         git_blame_common();
6433 }
6434
6435 sub git_blame_incremental {
6436         git_blame_common('incremental');
6437 }
6438
6439 sub git_blame_data {
6440         git_blame_common('data');
6441 }
6442
6443 sub git_tags {
6444         my $head = git_get_head_hash($project);
6445         git_header_html();
6446         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6447         git_print_header_div('summary', $project);
6448
6449         my @tagslist = git_get_tags_list();
6450         if (@tagslist) {
6451                 git_tags_body(\@tagslist);
6452         }
6453         git_footer_html();
6454 }
6455
6456 sub git_heads {
6457         my $head = git_get_head_hash($project);
6458         git_header_html();
6459         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6460         git_print_header_div('summary', $project);
6461
6462         my @headslist = git_get_heads_list();
6463         if (@headslist) {
6464                 git_heads_body(\@headslist, $head);
6465         }
6466         git_footer_html();
6467 }
6468
6469 # used both for single remote view and for list of all the remotes
6470 sub git_remotes {
6471         gitweb_check_feature('remote_heads')
6472                 or die_error(403, "Remote heads view is disabled");
6473
6474         my $head = git_get_head_hash($project);
6475         my $remote = $input_params{'hash'};
6476
6477         my $remotedata = git_get_remotes_list($remote);
6478         die_error(500, "Unable to get remote information") unless defined $remotedata;
6479
6480         unless (%$remotedata) {
6481                 die_error(404, defined $remote ?
6482                         "Remote $remote not found" :
6483                         "No remotes found");
6484         }
6485
6486         git_header_html(undef, undef, -action_extra => $remote);
6487         git_print_page_nav('', '',  $head, undef, $head,
6488                 format_ref_views($remote ? '' : 'remotes'));
6489
6490         fill_remote_heads($remotedata);
6491         if (defined $remote) {
6492                 git_print_header_div('remotes', "$remote remote for $project");
6493                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6494         } else {
6495                 git_print_header_div('summary', "$project remotes");
6496                 git_remotes_body($remotedata, undef, $head);
6497         }
6498
6499         git_footer_html();
6500 }
6501
6502 sub git_blob_plain {
6503         my $type = shift;
6504         my $expires;
6505
6506         if (!defined $hash) {
6507                 if (defined $file_name) {
6508                         my $base = $hash_base || git_get_head_hash($project);
6509                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6510                                 or die_error(404, "Cannot find file");
6511                 } else {
6512                         die_error(400, "No file name defined");
6513                 }
6514         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6515                 # blobs defined by non-textual hash id's can be cached
6516                 $expires = "+1d";
6517         }
6518
6519         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6520                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6521
6522         # content-type (can include charset)
6523         $type = blob_contenttype($fd, $file_name, $type);
6524
6525         # "save as" filename, even when no $file_name is given
6526         my $save_as = "$hash";
6527         if (defined $file_name) {
6528                 $save_as = $file_name;
6529         } elsif ($type =~ m/^text\//) {
6530                 $save_as .= '.txt';
6531         }
6532
6533         # With XSS prevention on, blobs of all types except a few known safe
6534         # ones are served with "Content-Disposition: attachment" to make sure
6535         # they don't run in our security domain.  For certain image types,
6536         # blob view writes an <img> tag referring to blob_plain view, and we
6537         # want to be sure not to break that by serving the image as an
6538         # attachment (though Firefox 3 doesn't seem to care).
6539         my $sandbox = $prevent_xss &&
6540                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6541
6542         # serve text/* as text/plain
6543         if ($prevent_xss &&
6544             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6545              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6546                 my $rest = $1;
6547                 $rest = defined $rest ? $rest : '';
6548                 $type = "text/plain$rest";
6549         }
6550
6551         print $cgi->header(
6552                 -type => $type,
6553                 -expires => $expires,
6554                 -content_disposition =>
6555                         ($sandbox ? 'attachment' : 'inline')
6556                         . '; filename="' . $save_as . '"');
6557         local $/ = undef;
6558         binmode STDOUT, ':raw';
6559         print <$fd>;
6560         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6561         close $fd;
6562 }
6563
6564 sub git_blob {
6565         my $expires;
6566
6567         if (!defined $hash) {
6568                 if (defined $file_name) {
6569                         my $base = $hash_base || git_get_head_hash($project);
6570                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6571                                 or die_error(404, "Cannot find file");
6572                 } else {
6573                         die_error(400, "No file name defined");
6574                 }
6575         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6576                 # blobs defined by non-textual hash id's can be cached
6577                 $expires = "+1d";
6578         }
6579
6580         my $have_blame = gitweb_check_feature('blame');
6581         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6582                 or die_error(500, "Couldn't cat $file_name, $hash");
6583         my $mimetype = blob_mimetype($fd, $file_name);
6584         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6585         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6586                 close $fd;
6587                 return git_blob_plain($mimetype);
6588         }
6589         # we can have blame only for text/* mimetype
6590         $have_blame &&= ($mimetype =~ m!^text/!);
6591
6592         my $highlight = gitweb_check_feature('highlight');
6593         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6594         $fd = run_highlighter($fd, $highlight, $syntax)
6595                 if $syntax;
6596
6597         git_header_html(undef, $expires);
6598         my $formats_nav = '';
6599         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6600                 if (defined $file_name) {
6601                         if ($have_blame) {
6602                                 $formats_nav .=
6603                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6604                                                 "blame") .
6605                                         " | ";
6606                         }
6607                         $formats_nav .=
6608                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6609                                         "history") .
6610                                 " | " .
6611                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6612                                         "raw") .
6613                                 " | " .
6614                                 $cgi->a({-href => href(action=>"blob",
6615                                                        hash_base=>"HEAD", file_name=>$file_name)},
6616                                         "HEAD");
6617                 } else {
6618                         $formats_nav .=
6619                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6620                                         "raw");
6621                 }
6622                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6623                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6624         } else {
6625                 print "<div class=\"page_nav\">\n" .
6626                       "<br/><br/></div>\n" .
6627                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6628         }
6629         git_print_page_path($file_name, "blob", $hash_base);
6630         print "<div class=\"page_body\">\n";
6631         if ($mimetype =~ m!^image/!) {
6632                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6633                 if ($file_name) {
6634                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6635                 }
6636                 print qq! src="! .
6637                       href(action=>"blob_plain", hash=>$hash,
6638                            hash_base=>$hash_base, file_name=>$file_name) .
6639                       qq!" />\n!;
6640         } else {
6641                 my $nr;
6642                 while (my $line = <$fd>) {
6643                         chomp $line;
6644                         $nr++;
6645                         $line = untabify($line);
6646                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6647                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6648                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6649                 }
6650         }
6651         close $fd
6652                 or print "Reading blob failed.\n";
6653         print "</div>";
6654         git_footer_html();
6655 }
6656
6657 sub git_tree {
6658         if (!defined $hash_base) {
6659                 $hash_base = "HEAD";
6660         }
6661         if (!defined $hash) {
6662                 if (defined $file_name) {
6663                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6664                 } else {
6665                         $hash = $hash_base;
6666                 }
6667         }
6668         die_error(404, "No such tree") unless defined($hash);
6669
6670         my $show_sizes = gitweb_check_feature('show-sizes');
6671         my $have_blame = gitweb_check_feature('blame');
6672
6673         my @entries = ();
6674         {
6675                 local $/ = "\0";
6676                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6677                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6678                         or die_error(500, "Open git-ls-tree failed");
6679                 @entries = map { chomp; $_ } <$fd>;
6680                 close $fd
6681                         or die_error(404, "Reading tree failed");
6682         }
6683
6684         my $refs = git_get_references();
6685         my $ref = format_ref_marker($refs, $hash_base);
6686         git_header_html();
6687         my $basedir = '';
6688         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6689                 my @views_nav = ();
6690                 if (defined $file_name) {
6691                         push @views_nav,
6692                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6693                                         "history"),
6694                                 $cgi->a({-href => href(action=>"tree",
6695                                                        hash_base=>"HEAD", file_name=>$file_name)},
6696                                         "HEAD"),
6697                 }
6698                 my $snapshot_links = format_snapshot_links($hash);
6699                 if (defined $snapshot_links) {
6700                         # FIXME: Should be available when we have no hash base as well.
6701                         push @views_nav, $snapshot_links;
6702                 }
6703                 git_print_page_nav('tree','', $hash_base, undef, undef,
6704                                    join(' | ', @views_nav));
6705                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6706         } else {
6707                 undef $hash_base;
6708                 print "<div class=\"page_nav\">\n";
6709                 print "<br/><br/></div>\n";
6710                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6711         }
6712         if (defined $file_name) {
6713                 $basedir = $file_name;
6714                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6715                         $basedir .= '/';
6716                 }
6717                 git_print_page_path($file_name, 'tree', $hash_base);
6718         }
6719         print "<div class=\"page_body\">\n";
6720         print "<table class=\"tree\">\n";
6721         my $alternate = 1;
6722         # '..' (top directory) link if possible
6723         if (defined $hash_base &&
6724             defined $file_name && $file_name =~ m![^/]+$!) {
6725                 if ($alternate) {
6726                         print "<tr class=\"dark\">\n";
6727                 } else {
6728                         print "<tr class=\"light\">\n";
6729                 }
6730                 $alternate ^= 1;
6731
6732                 my $up = $file_name;
6733                 $up =~ s!/?[^/]+$!!;
6734                 undef $up unless $up;
6735                 # based on git_print_tree_entry
6736                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6737                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6738                 print '<td class="list">';
6739                 print $cgi->a({-href => href(action=>"tree",
6740                                              hash_base=>$hash_base,
6741                                              file_name=>$up)},
6742                               "..");
6743                 print "</td>\n";
6744                 print "<td class=\"link\"></td>\n";
6745
6746                 print "</tr>\n";
6747         }
6748         foreach my $line (@entries) {
6749                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6750
6751                 if ($alternate) {
6752                         print "<tr class=\"dark\">\n";
6753                 } else {
6754                         print "<tr class=\"light\">\n";
6755                 }
6756                 $alternate ^= 1;
6757
6758                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6759
6760                 print "</tr>\n";
6761         }
6762         print "</table>\n" .
6763               "</div>";
6764         git_footer_html();
6765 }
6766
6767 sub snapshot_name {
6768         my ($project, $hash) = @_;
6769
6770         # path/to/project.git  -> project
6771         # path/to/project/.git -> project
6772         my $name = to_utf8($project);
6773         $name =~ s,([^/])/*\.git$,$1,;
6774         $name = basename($name);
6775         # sanitize name
6776         $name =~ s/[[:cntrl:]]/?/g;
6777
6778         my $ver = $hash;
6779         if ($hash =~ /^[0-9a-fA-F]+$/) {
6780                 # shorten SHA-1 hash
6781                 my $full_hash = git_get_full_hash($project, $hash);
6782                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6783                         $ver = git_get_short_hash($project, $hash);
6784                 }
6785         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6786                 # tags don't need shortened SHA-1 hash
6787                 $ver = $1;
6788         } else {
6789                 # branches and other need shortened SHA-1 hash
6790                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6791                         $ver = $1;
6792                 }
6793                 $ver .= '-' . git_get_short_hash($project, $hash);
6794         }
6795         # in case of hierarchical branch names
6796         $ver =~ s!/!.!g;
6797
6798         # name = project-version_string
6799         $name = "$name-$ver";
6800
6801         return wantarray ? ($name, $name) : $name;
6802 }
6803
6804 sub git_snapshot {
6805         my $format = $input_params{'snapshot_format'};
6806         if (!@snapshot_fmts) {
6807                 die_error(403, "Snapshots not allowed");
6808         }
6809         # default to first supported snapshot format
6810         $format ||= $snapshot_fmts[0];
6811         if ($format !~ m/^[a-z0-9]+$/) {
6812                 die_error(400, "Invalid snapshot format parameter");
6813         } elsif (!exists($known_snapshot_formats{$format})) {
6814                 die_error(400, "Unknown snapshot format");
6815         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6816                 die_error(403, "Snapshot format not allowed");
6817         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6818                 die_error(403, "Unsupported snapshot format");
6819         }
6820
6821         my $type = git_get_type("$hash^{}");
6822         if (!$type) {
6823                 die_error(404, 'Object does not exist');
6824         }  elsif ($type eq 'blob') {
6825                 die_error(400, 'Object is not a tree-ish');
6826         }
6827
6828         my ($name, $prefix) = snapshot_name($project, $hash);
6829         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6830         my $cmd = quote_command(
6831                 git_cmd(), 'archive',
6832                 "--format=$known_snapshot_formats{$format}{'format'}",
6833                 "--prefix=$prefix/", $hash);
6834         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6835                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6836         }
6837
6838         $filename =~ s/(["\\])/\\$1/g;
6839         print $cgi->header(
6840                 -type => $known_snapshot_formats{$format}{'type'},
6841                 -content_disposition => 'inline; filename="' . $filename . '"',
6842                 -status => '200 OK');
6843
6844         open my $fd, "-|", $cmd
6845                 or die_error(500, "Execute git-archive failed");
6846         binmode STDOUT, ':raw';
6847         print <$fd>;
6848         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6849         close $fd;
6850 }
6851
6852 sub git_log_generic {
6853         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6854
6855         my $head = git_get_head_hash($project);
6856         if (!defined $base) {
6857                 $base = $head;
6858         }
6859         if (!defined $page) {
6860                 $page = 0;
6861         }
6862         my $refs = git_get_references();
6863
6864         my $commit_hash = $base;
6865         if (defined $parent) {
6866                 $commit_hash = "$parent..$base";
6867         }
6868         my @commitlist =
6869                 parse_commits($commit_hash, 101, (100 * $page),
6870                               defined $file_name ? ($file_name, "--full-history") : ());
6871
6872         my $ftype;
6873         if (!defined $file_hash && defined $file_name) {
6874                 # some commits could have deleted file in question,
6875                 # and not have it in tree, but one of them has to have it
6876                 for (my $i = 0; $i < @commitlist; $i++) {
6877                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6878                         last if defined $file_hash;
6879                 }
6880         }
6881         if (defined $file_hash) {
6882                 $ftype = git_get_type($file_hash);
6883         }
6884         if (defined $file_name && !defined $ftype) {
6885                 die_error(500, "Unknown type of object");
6886         }
6887         my %co;
6888         if (defined $file_name) {
6889                 %co = parse_commit($base)
6890                         or die_error(404, "Unknown commit object");
6891         }
6892
6893
6894         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6895         my $next_link = '';
6896         if ($#commitlist >= 100) {
6897                 $next_link =
6898                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6899                                  -accesskey => "n", -title => "Alt-n"}, "next");
6900         }
6901         my $patch_max = gitweb_get_feature('patches');
6902         if ($patch_max && !defined $file_name) {
6903                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6904                         $paging_nav .= " &sdot; " .
6905                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6906                                         "patches");
6907                 }
6908         }
6909
6910         git_header_html();
6911         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6912         if (defined $file_name) {
6913                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6914         } else {
6915                 git_print_header_div('summary', $project)
6916         }
6917         git_print_page_path($file_name, $ftype, $hash_base)
6918                 if (defined $file_name);
6919
6920         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6921                      $file_name, $file_hash, $ftype);
6922
6923         git_footer_html();
6924 }
6925
6926 sub git_log {
6927         git_log_generic('log', \&git_log_body,
6928                         $hash, $hash_parent);
6929 }
6930
6931 sub git_commit {
6932         $hash ||= $hash_base || "HEAD";
6933         my %co = parse_commit($hash)
6934             or die_error(404, "Unknown commit object");
6935
6936         my $parent  = $co{'parent'};
6937         my $parents = $co{'parents'}; # listref
6938
6939         # we need to prepare $formats_nav before any parameter munging
6940         my $formats_nav;
6941         if (!defined $parent) {
6942                 # --root commitdiff
6943                 $formats_nav .= '(initial)';
6944         } elsif (@$parents == 1) {
6945                 # single parent commit
6946                 $formats_nav .=
6947                         '(parent: ' .
6948                         $cgi->a({-href => href(action=>"commit",
6949                                                hash=>$parent)},
6950                                 esc_html(substr($parent, 0, 7))) .
6951                         ')';
6952         } else {
6953                 # merge commit
6954                 $formats_nav .=
6955                         '(merge: ' .
6956                         join(' ', map {
6957                                 $cgi->a({-href => href(action=>"commit",
6958                                                        hash=>$_)},
6959                                         esc_html(substr($_, 0, 7)));
6960                         } @$parents ) .
6961                         ')';
6962         }
6963         if (gitweb_check_feature('patches') && @$parents <= 1) {
6964                 $formats_nav .= " | " .
6965                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6966                                 "patch");
6967         }
6968
6969         if (!defined $parent) {
6970                 $parent = "--root";
6971         }
6972         my @difftree;
6973         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6974                 @diff_opts,
6975                 (@$parents <= 1 ? $parent : '-c'),
6976                 $hash, "--"
6977                 or die_error(500, "Open git-diff-tree failed");
6978         @difftree = map { chomp; $_ } <$fd>;
6979         close $fd or die_error(404, "Reading git-diff-tree failed");
6980
6981         # non-textual hash id's can be cached
6982         my $expires;
6983         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6984                 $expires = "+1d";
6985         }
6986         my $refs = git_get_references();
6987         my $ref = format_ref_marker($refs, $co{'id'});
6988
6989         git_header_html(undef, $expires);
6990         git_print_page_nav('commit', '',
6991                            $hash, $co{'tree'}, $hash,
6992                            $formats_nav);
6993
6994         if (defined $co{'parent'}) {
6995                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6996         } else {
6997                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6998         }
6999         print "<div class=\"title_text\">\n" .
7000               "<table class=\"object_header\">\n";
7001         git_print_authorship_rows(\%co);
7002         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7003         print "<tr>" .
7004               "<td>tree</td>" .
7005               "<td class=\"sha1\">" .
7006               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7007                        class => "list"}, $co{'tree'}) .
7008               "</td>" .
7009               "<td class=\"link\">" .
7010               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7011                       "tree");
7012         my $snapshot_links = format_snapshot_links($hash);
7013         if (defined $snapshot_links) {
7014                 print " | " . $snapshot_links;
7015         }
7016         print "</td>" .
7017               "</tr>\n";
7018
7019         foreach my $par (@$parents) {
7020                 print "<tr>" .
7021                       "<td>parent</td>" .
7022                       "<td class=\"sha1\">" .
7023                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7024                                class => "list"}, $par) .
7025                       "</td>" .
7026                       "<td class=\"link\">" .
7027                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7028                       " | " .
7029                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7030                       "</td>" .
7031                       "</tr>\n";
7032         }
7033         print "</table>".
7034               "</div>\n";
7035
7036         print "<div class=\"page_body\">\n";
7037         git_print_log($co{'comment'});
7038         print "</div>\n";
7039
7040         git_difftree_body(\@difftree, $hash, @$parents);
7041
7042         git_footer_html();
7043 }
7044
7045 sub git_object {
7046         # object is defined by:
7047         # - hash or hash_base alone
7048         # - hash_base and file_name
7049         my $type;
7050
7051         # - hash or hash_base alone
7052         if ($hash || ($hash_base && !defined $file_name)) {
7053                 my $object_id = $hash || $hash_base;
7054
7055                 open my $fd, "-|", quote_command(
7056                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7057                         or die_error(404, "Object does not exist");
7058                 $type = <$fd>;
7059                 chomp $type;
7060                 close $fd
7061                         or die_error(404, "Object does not exist");
7062
7063         # - hash_base and file_name
7064         } elsif ($hash_base && defined $file_name) {
7065                 $file_name =~ s,/+$,,;
7066
7067                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7068                         or die_error(404, "Base object does not exist");
7069
7070                 # here errors should not hapen
7071                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7072                         or die_error(500, "Open git-ls-tree failed");
7073                 my $line = <$fd>;
7074                 close $fd;
7075
7076                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7077                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7078                         die_error(404, "File or directory for given base does not exist");
7079                 }
7080                 $type = $2;
7081                 $hash = $3;
7082         } else {
7083                 die_error(400, "Not enough information to find object");
7084         }
7085
7086         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7087                                           hash=>$hash, hash_base=>$hash_base,
7088                                           file_name=>$file_name),
7089                              -status => '302 Found');
7090 }
7091
7092 sub git_blobdiff {
7093         my $format = shift || 'html';
7094         my $diff_style = $input_params{'diff_style'} || 'inline';
7095
7096         my $fd;
7097         my @difftree;
7098         my %diffinfo;
7099         my $expires;
7100
7101         # preparing $fd and %diffinfo for git_patchset_body
7102         # new style URI
7103         if (defined $hash_base && defined $hash_parent_base) {
7104                 if (defined $file_name) {
7105                         # read raw output
7106                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7107                                 $hash_parent_base, $hash_base,
7108                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7109                                 or die_error(500, "Open git-diff-tree failed");
7110                         @difftree = map { chomp; $_ } <$fd>;
7111                         close $fd
7112                                 or die_error(404, "Reading git-diff-tree failed");
7113                         @difftree
7114                                 or die_error(404, "Blob diff not found");
7115
7116                 } elsif (defined $hash &&
7117                          $hash =~ /[0-9a-fA-F]{40}/) {
7118                         # try to find filename from $hash
7119
7120                         # read filtered raw output
7121                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7122                                 $hash_parent_base, $hash_base, "--"
7123                                 or die_error(500, "Open git-diff-tree failed");
7124                         @difftree =
7125                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7126                                 # $hash == to_id
7127                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7128                                 map { chomp; $_ } <$fd>;
7129                         close $fd
7130                                 or die_error(404, "Reading git-diff-tree failed");
7131                         @difftree
7132                                 or die_error(404, "Blob diff not found");
7133
7134                 } else {
7135                         die_error(400, "Missing one of the blob diff parameters");
7136                 }
7137
7138                 if (@difftree > 1) {
7139                         die_error(400, "Ambiguous blob diff specification");
7140                 }
7141
7142                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7143                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7144                 $file_name   ||= $diffinfo{'to_file'};
7145
7146                 $hash_parent ||= $diffinfo{'from_id'};
7147                 $hash        ||= $diffinfo{'to_id'};
7148
7149                 # non-textual hash id's can be cached
7150                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7151                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7152                         $expires = '+1d';
7153                 }
7154
7155                 # open patch output
7156                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7157                         '-p', ($format eq 'html' ? "--full-index" : ()),
7158                         $hash_parent_base, $hash_base,
7159                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7160                         or die_error(500, "Open git-diff-tree failed");
7161         }
7162
7163         # old/legacy style URI -- not generated anymore since 1.4.3.
7164         if (!%diffinfo) {
7165                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7166         }
7167
7168         # header
7169         if ($format eq 'html') {
7170                 my $formats_nav =
7171                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7172                                 "raw");
7173                 $formats_nav .= diff_style_nav($diff_style);
7174                 git_header_html(undef, $expires);
7175                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7176                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7177                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7178                 } else {
7179                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7180                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7181                 }
7182                 if (defined $file_name) {
7183                         git_print_page_path($file_name, "blob", $hash_base);
7184                 } else {
7185                         print "<div class=\"page_path\"></div>\n";
7186                 }
7187
7188         } elsif ($format eq 'plain') {
7189                 print $cgi->header(
7190                         -type => 'text/plain',
7191                         -charset => 'utf-8',
7192                         -expires => $expires,
7193                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7194
7195                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7196
7197         } else {
7198                 die_error(400, "Unknown blobdiff format");
7199         }
7200
7201         # patch
7202         if ($format eq 'html') {
7203                 print "<div class=\"page_body\">\n";
7204
7205                 git_patchset_body($fd, $diff_style,
7206                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7207                 close $fd;
7208
7209                 print "</div>\n"; # class="page_body"
7210                 git_footer_html();
7211
7212         } else {
7213                 while (my $line = <$fd>) {
7214                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7215                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7216
7217                         print $line;
7218
7219                         last if $line =~ m!^\+\+\+!;
7220                 }
7221                 local $/ = undef;
7222                 print <$fd>;
7223                 close $fd;
7224         }
7225 }
7226
7227 sub git_blobdiff_plain {
7228         git_blobdiff('plain');
7229 }
7230
7231 # assumes that it is added as later part of already existing navigation,
7232 # so it returns "| foo | bar" rather than just "foo | bar"
7233 sub diff_style_nav {
7234         my ($diff_style, $is_combined) = @_;
7235         $diff_style ||= 'inline';
7236
7237         return "" if ($is_combined);
7238
7239         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7240         my %styles = @styles;
7241         @styles =
7242                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7243
7244         return join '',
7245                 map { " | ".$_ }
7246                 map {
7247                         $_ eq $diff_style ? $styles{$_} :
7248                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7249                 } @styles;
7250 }
7251
7252 sub git_commitdiff {
7253         my %params = @_;
7254         my $format = $params{-format} || 'html';
7255         my $diff_style = $input_params{'diff_style'} || 'inline';
7256
7257         my ($patch_max) = gitweb_get_feature('patches');
7258         if ($format eq 'patch') {
7259                 die_error(403, "Patch view not allowed") unless $patch_max;
7260         }
7261
7262         $hash ||= $hash_base || "HEAD";
7263         my %co = parse_commit($hash)
7264             or die_error(404, "Unknown commit object");
7265
7266         # choose format for commitdiff for merge
7267         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7268                 $hash_parent = '--cc';
7269         }
7270         # we need to prepare $formats_nav before almost any parameter munging
7271         my $formats_nav;
7272         if ($format eq 'html') {
7273                 $formats_nav =
7274                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7275                                 "raw");
7276                 if ($patch_max && @{$co{'parents'}} <= 1) {
7277                         $formats_nav .= " | " .
7278                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7279                                         "patch");
7280                 }
7281                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7282
7283                 if (defined $hash_parent &&
7284                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7285                         # commitdiff with two commits given
7286                         my $hash_parent_short = $hash_parent;
7287                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7288                                 $hash_parent_short = substr($hash_parent, 0, 7);
7289                         }
7290                         $formats_nav .=
7291                                 ' (from';
7292                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7293                                 if ($co{'parents'}[$i] eq $hash_parent) {
7294                                         $formats_nav .= ' parent ' . ($i+1);
7295                                         last;
7296                                 }
7297                         }
7298                         $formats_nav .= ': ' .
7299                                 $cgi->a({-href => href(-replay=>1,
7300                                                        hash=>$hash_parent, hash_base=>undef)},
7301                                         esc_html($hash_parent_short)) .
7302                                 ')';
7303                 } elsif (!$co{'parent'}) {
7304                         # --root commitdiff
7305                         $formats_nav .= ' (initial)';
7306                 } elsif (scalar @{$co{'parents'}} == 1) {
7307                         # single parent commit
7308                         $formats_nav .=
7309                                 ' (parent: ' .
7310                                 $cgi->a({-href => href(-replay=>1,
7311                                                        hash=>$co{'parent'}, hash_base=>undef)},
7312                                         esc_html(substr($co{'parent'}, 0, 7))) .
7313                                 ')';
7314                 } else {
7315                         # merge commit
7316                         if ($hash_parent eq '--cc') {
7317                                 $formats_nav .= ' | ' .
7318                                         $cgi->a({-href => href(-replay=>1,
7319                                                                hash=>$hash, hash_parent=>'-c')},
7320                                                 'combined');
7321                         } else { # $hash_parent eq '-c'
7322                                 $formats_nav .= ' | ' .
7323                                         $cgi->a({-href => href(-replay=>1,
7324                                                                hash=>$hash, hash_parent=>'--cc')},
7325                                                 'compact');
7326                         }
7327                         $formats_nav .=
7328                                 ' (merge: ' .
7329                                 join(' ', map {
7330                                         $cgi->a({-href => href(-replay=>1,
7331                                                                hash=>$_, hash_base=>undef)},
7332                                                 esc_html(substr($_, 0, 7)));
7333                                 } @{$co{'parents'}} ) .
7334                                 ')';
7335                 }
7336         }
7337
7338         my $hash_parent_param = $hash_parent;
7339         if (!defined $hash_parent_param) {
7340                 # --cc for multiple parents, --root for parentless
7341                 $hash_parent_param =
7342                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7343         }
7344
7345         # read commitdiff
7346         my $fd;
7347         my @difftree;
7348         if ($format eq 'html') {
7349                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7350                         "--no-commit-id", "--patch-with-raw", "--full-index",
7351                         $hash_parent_param, $hash, "--"
7352                         or die_error(500, "Open git-diff-tree failed");
7353
7354                 while (my $line = <$fd>) {
7355                         chomp $line;
7356                         # empty line ends raw part of diff-tree output
7357                         last unless $line;
7358                         push @difftree, scalar parse_difftree_raw_line($line);
7359                 }
7360
7361         } elsif ($format eq 'plain') {
7362                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7363                         '-p', $hash_parent_param, $hash, "--"
7364                         or die_error(500, "Open git-diff-tree failed");
7365         } elsif ($format eq 'patch') {
7366                 # For commit ranges, we limit the output to the number of
7367                 # patches specified in the 'patches' feature.
7368                 # For single commits, we limit the output to a single patch,
7369                 # diverging from the git-format-patch default.
7370                 my @commit_spec = ();
7371                 if ($hash_parent) {
7372                         if ($patch_max > 0) {
7373                                 push @commit_spec, "-$patch_max";
7374                         }
7375                         push @commit_spec, '-n', "$hash_parent..$hash";
7376                 } else {
7377                         if ($params{-single}) {
7378                                 push @commit_spec, '-1';
7379                         } else {
7380                                 if ($patch_max > 0) {
7381                                         push @commit_spec, "-$patch_max";
7382                                 }
7383                                 push @commit_spec, "-n";
7384                         }
7385                         push @commit_spec, '--root', $hash;
7386                 }
7387                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7388                         '--encoding=utf8', '--stdout', @commit_spec
7389                         or die_error(500, "Open git-format-patch failed");
7390         } else {
7391                 die_error(400, "Unknown commitdiff format");
7392         }
7393
7394         # non-textual hash id's can be cached
7395         my $expires;
7396         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7397                 $expires = "+1d";
7398         }
7399
7400         # write commit message
7401         if ($format eq 'html') {
7402                 my $refs = git_get_references();
7403                 my $ref = format_ref_marker($refs, $co{'id'});
7404
7405                 git_header_html(undef, $expires);
7406                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7407                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7408                 print "<div class=\"title_text\">\n" .
7409                       "<table class=\"object_header\">\n";
7410                 git_print_authorship_rows(\%co);
7411                 print "</table>".
7412                       "</div>\n";
7413                 print "<div class=\"page_body\">\n";
7414                 if (@{$co{'comment'}} > 1) {
7415                         print "<div class=\"log\">\n";
7416                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7417                         print "</div>\n"; # class="log"
7418                 }
7419
7420         } elsif ($format eq 'plain') {
7421                 my $refs = git_get_references("tags");
7422                 my $tagname = git_get_rev_name_tags($hash);
7423                 my $filename = basename($project) . "-$hash.patch";
7424
7425                 print $cgi->header(
7426                         -type => 'text/plain',
7427                         -charset => 'utf-8',
7428                         -expires => $expires,
7429                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7430                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7431                 print "From: " . to_utf8($co{'author'}) . "\n";
7432                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7433                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7434
7435                 print "X-Git-Tag: $tagname\n" if $tagname;
7436                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7437
7438                 foreach my $line (@{$co{'comment'}}) {
7439                         print to_utf8($line) . "\n";
7440                 }
7441                 print "---\n\n";
7442         } elsif ($format eq 'patch') {
7443                 my $filename = basename($project) . "-$hash.patch";
7444
7445                 print $cgi->header(
7446                         -type => 'text/plain',
7447                         -charset => 'utf-8',
7448                         -expires => $expires,
7449                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7450         }
7451
7452         # write patch
7453         if ($format eq 'html') {
7454                 my $use_parents = !defined $hash_parent ||
7455                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7456                 git_difftree_body(\@difftree, $hash,
7457                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7458                 print "<br/>\n";
7459
7460                 git_patchset_body($fd, $diff_style,
7461                                   \@difftree, $hash,
7462                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7463                 close $fd;
7464                 print "</div>\n"; # class="page_body"
7465                 git_footer_html();
7466
7467         } elsif ($format eq 'plain') {
7468                 local $/ = undef;
7469                 print <$fd>;
7470                 close $fd
7471                         or print "Reading git-diff-tree failed\n";
7472         } elsif ($format eq 'patch') {
7473                 local $/ = undef;
7474                 print <$fd>;
7475                 close $fd
7476                         or print "Reading git-format-patch failed\n";
7477         }
7478 }
7479
7480 sub git_commitdiff_plain {
7481         git_commitdiff(-format => 'plain');
7482 }
7483
7484 # format-patch-style patches
7485 sub git_patch {
7486         git_commitdiff(-format => 'patch', -single => 1);
7487 }
7488
7489 sub git_patches {
7490         git_commitdiff(-format => 'patch');
7491 }
7492
7493 sub git_history {
7494         git_log_generic('history', \&git_history_body,
7495                         $hash_base, $hash_parent_base,
7496                         $file_name, $hash);
7497 }
7498
7499 sub git_search {
7500         $searchtype ||= 'commit';
7501
7502         # check if appropriate features are enabled
7503         gitweb_check_feature('search')
7504                 or die_error(403, "Search is disabled");
7505         if ($searchtype eq 'pickaxe') {
7506                 # pickaxe may take all resources of your box and run for several minutes
7507                 # with every query - so decide by yourself how public you make this feature
7508                 gitweb_check_feature('pickaxe')
7509                         or die_error(403, "Pickaxe search is disabled");
7510         }
7511         if ($searchtype eq 'grep') {
7512                 # grep search might be potentially CPU-intensive, too
7513                 gitweb_check_feature('grep')
7514                         or die_error(403, "Grep search is disabled");
7515         }
7516
7517         if (!defined $searchtext) {
7518                 die_error(400, "Text field is empty");
7519         }
7520         if (!defined $hash) {
7521                 $hash = git_get_head_hash($project);
7522         }
7523         my %co = parse_commit($hash);
7524         if (!%co) {
7525                 die_error(404, "Unknown commit object");
7526         }
7527         if (!defined $page) {
7528                 $page = 0;
7529         }
7530
7531         if ($searchtype eq 'commit' ||
7532             $searchtype eq 'author' ||
7533             $searchtype eq 'committer') {
7534                 git_search_message(%co);
7535         } elsif ($searchtype eq 'pickaxe') {
7536                 git_search_changes(%co);
7537         } elsif ($searchtype eq 'grep') {
7538                 git_search_files(%co);
7539         } else {
7540                 die_error(400, "Unknown search type");
7541         }
7542 }
7543
7544 sub git_search_help {
7545         git_header_html();
7546         git_print_page_nav('','', $hash,$hash,$hash);
7547         print <<EOT;
7548 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7549 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7550 the pattern entered is recognized as the POSIX extended
7551 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7552 insensitive).</p>
7553 <dl>
7554 <dt><b>commit</b></dt>
7555 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7556 EOT
7557         my $have_grep = gitweb_check_feature('grep');
7558         if ($have_grep) {
7559                 print <<EOT;
7560 <dt><b>grep</b></dt>
7561 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7562     a different one) are searched for the given pattern. On large trees, this search can take
7563 a while and put some strain on the server, so please use it with some consideration. Note that
7564 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7565 case-sensitive.</dd>
7566 EOT
7567         }
7568         print <<EOT;
7569 <dt><b>author</b></dt>
7570 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7571 <dt><b>committer</b></dt>
7572 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7573 EOT
7574         my $have_pickaxe = gitweb_check_feature('pickaxe');
7575         if ($have_pickaxe) {
7576                 print <<EOT;
7577 <dt><b>pickaxe</b></dt>
7578 <dd>All commits that caused the string to appear or disappear from any file (changes that
7579 added, removed or "modified" the string) will be listed. This search can take a while and
7580 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7581 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7582 EOT
7583         }
7584         print "</dl>\n";
7585         git_footer_html();
7586 }
7587
7588 sub git_shortlog {
7589         git_log_generic('shortlog', \&git_shortlog_body,
7590                         $hash, $hash_parent);
7591 }
7592
7593 ## ......................................................................
7594 ## feeds (RSS, Atom; OPML)
7595
7596 sub git_feed {
7597         my $format = shift || 'atom';
7598         my $have_blame = gitweb_check_feature('blame');
7599
7600         # Atom: http://www.atomenabled.org/developers/syndication/
7601         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7602         if ($format ne 'rss' && $format ne 'atom') {
7603                 die_error(400, "Unknown web feed format");
7604         }
7605
7606         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7607         my $head = $hash || 'HEAD';
7608         my @commitlist = parse_commits($head, 150, 0, $file_name);
7609
7610         my %latest_commit;
7611         my %latest_date;
7612         my $content_type = "application/$format+xml";
7613         if (defined $cgi->http('HTTP_ACCEPT') &&
7614                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7615                 # browser (feed reader) prefers text/xml
7616                 $content_type = 'text/xml';
7617         }
7618         if (defined($commitlist[0])) {
7619                 %latest_commit = %{$commitlist[0]};
7620                 my $latest_epoch = $latest_commit{'committer_epoch'};
7621                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7622                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7623                 if (defined $if_modified) {
7624                         my $since;
7625                         if (eval { require HTTP::Date; 1; }) {
7626                                 $since = HTTP::Date::str2time($if_modified);
7627                         } elsif (eval { require Time::ParseDate; 1; }) {
7628                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7629                         }
7630                         if (defined $since && $latest_epoch <= $since) {
7631                                 print $cgi->header(
7632                                         -type => $content_type,
7633                                         -charset => 'utf-8',
7634                                         -last_modified => $latest_date{'rfc2822'},
7635                                         -status => '304 Not Modified');
7636                                 return;
7637                         }
7638                 }
7639                 print $cgi->header(
7640                         -type => $content_type,
7641                         -charset => 'utf-8',
7642                         -last_modified => $latest_date{'rfc2822'});
7643         } else {
7644                 print $cgi->header(
7645                         -type => $content_type,
7646                         -charset => 'utf-8');
7647         }
7648
7649         # Optimization: skip generating the body if client asks only
7650         # for Last-Modified date.
7651         return if ($cgi->request_method() eq 'HEAD');
7652
7653         # header variables
7654         my $title = "$site_name - $project/$action";
7655         my $feed_type = 'log';
7656         if (defined $hash) {
7657                 $title .= " - '$hash'";
7658                 $feed_type = 'branch log';
7659                 if (defined $file_name) {
7660                         $title .= " :: $file_name";
7661                         $feed_type = 'history';
7662                 }
7663         } elsif (defined $file_name) {
7664                 $title .= " - $file_name";
7665                 $feed_type = 'history';
7666         }
7667         $title .= " $feed_type";
7668         my $descr = git_get_project_description($project);
7669         if (defined $descr) {
7670                 $descr = esc_html($descr);
7671         } else {
7672                 $descr = "$project " .
7673                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7674                          " feed";
7675         }
7676         my $owner = git_get_project_owner($project);
7677         $owner = esc_html($owner);
7678
7679         #header
7680         my $alt_url;
7681         if (defined $file_name) {
7682                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7683         } elsif (defined $hash) {
7684                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7685         } else {
7686                 $alt_url = href(-full=>1, action=>"summary");
7687         }
7688         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7689         if ($format eq 'rss') {
7690                 print <<XML;
7691 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7692 <channel>
7693 XML
7694                 print "<title>$title</title>\n" .
7695                       "<link>$alt_url</link>\n" .
7696                       "<description>$descr</description>\n" .
7697                       "<language>en</language>\n" .
7698                       # project owner is responsible for 'editorial' content
7699                       "<managingEditor>$owner</managingEditor>\n";
7700                 if (defined $logo || defined $favicon) {
7701                         # prefer the logo to the favicon, since RSS
7702                         # doesn't allow both
7703                         my $img = esc_url($logo || $favicon);
7704                         print "<image>\n" .
7705                               "<url>$img</url>\n" .
7706                               "<title>$title</title>\n" .
7707                               "<link>$alt_url</link>\n" .
7708                               "</image>\n";
7709                 }
7710                 if (%latest_date) {
7711                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7712                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7713                 }
7714                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7715         } elsif ($format eq 'atom') {
7716                 print <<XML;
7717 <feed xmlns="http://www.w3.org/2005/Atom">
7718 XML
7719                 print "<title>$title</title>\n" .
7720                       "<subtitle>$descr</subtitle>\n" .
7721                       '<link rel="alternate" type="text/html" href="' .
7722                       $alt_url . '" />' . "\n" .
7723                       '<link rel="self" type="' . $content_type . '" href="' .
7724                       $cgi->self_url() . '" />' . "\n" .
7725                       "<id>" . href(-full=>1) . "</id>\n" .
7726                       # use project owner for feed author
7727                       "<author><name>$owner</name></author>\n";
7728                 if (defined $favicon) {
7729                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7730                 }
7731                 if (defined $logo) {
7732                         # not twice as wide as tall: 72 x 27 pixels
7733                         print "<logo>" . esc_url($logo) . "</logo>\n";
7734                 }
7735                 if (! %latest_date) {
7736                         # dummy date to keep the feed valid until commits trickle in:
7737                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7738                 } else {
7739                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7740                 }
7741                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7742         }
7743
7744         # contents
7745         for (my $i = 0; $i <= $#commitlist; $i++) {
7746                 my %co = %{$commitlist[$i]};
7747                 my $commit = $co{'id'};
7748                 # we read 150, we always show 30 and the ones more recent than 48 hours
7749                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7750                         last;
7751                 }
7752                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7753
7754                 # get list of changed files
7755                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7756                         $co{'parent'} || "--root",
7757                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7758                         or next;
7759                 my @difftree = map { chomp; $_ } <$fd>;
7760                 close $fd
7761                         or next;
7762
7763                 # print element (entry, item)
7764                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7765                 if ($format eq 'rss') {
7766                         print "<item>\n" .
7767                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7768                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7769                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7770                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7771                               "<link>$co_url</link>\n" .
7772                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7773                               "<content:encoded>" .
7774                               "<![CDATA[\n";
7775                 } elsif ($format eq 'atom') {
7776                         print "<entry>\n" .
7777                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7778                               "<updated>$cd{'iso-8601'}</updated>\n" .
7779                               "<author>\n" .
7780                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7781                         if ($co{'author_email'}) {
7782                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7783                         }
7784                         print "</author>\n" .
7785                               # use committer for contributor
7786                               "<contributor>\n" .
7787                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7788                         if ($co{'committer_email'}) {
7789                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7790                         }
7791                         print "</contributor>\n" .
7792                               "<published>$cd{'iso-8601'}</published>\n" .
7793                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7794                               "<id>$co_url</id>\n" .
7795                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7796                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7797                 }
7798                 my $comment = $co{'comment'};
7799                 print "<pre>\n";
7800                 foreach my $line (@$comment) {
7801                         $line = esc_html($line);
7802                         print "$line\n";
7803                 }
7804                 print "</pre><ul>\n";
7805                 foreach my $difftree_line (@difftree) {
7806                         my %difftree = parse_difftree_raw_line($difftree_line);
7807                         next if !$difftree{'from_id'};
7808
7809                         my $file = $difftree{'file'} || $difftree{'to_file'};
7810
7811                         print "<li>" .
7812                               "[" .
7813                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7814                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7815                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7816                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7817                                       -title => "diff"}, 'D');
7818                         if ($have_blame) {
7819                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7820                                                              file_name=>$file, hash_base=>$commit),
7821                                               -title => "blame"}, 'B');
7822                         }
7823                         # if this is not a feed of a file history
7824                         if (!defined $file_name || $file_name ne $file) {
7825                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7826                                                              file_name=>$file, hash=>$commit),
7827                                               -title => "history"}, 'H');
7828                         }
7829                         $file = esc_path($file);
7830                         print "] ".
7831                               "$file</li>\n";
7832                 }
7833                 if ($format eq 'rss') {
7834                         print "</ul>]]>\n" .
7835                               "</content:encoded>\n" .
7836                               "</item>\n";
7837                 } elsif ($format eq 'atom') {
7838                         print "</ul>\n</div>\n" .
7839                               "</content>\n" .
7840                               "</entry>\n";
7841                 }
7842         }
7843
7844         # end of feed
7845         if ($format eq 'rss') {
7846                 print "</channel>\n</rss>\n";
7847         } elsif ($format eq 'atom') {
7848                 print "</feed>\n";
7849         }
7850 }
7851
7852 sub git_rss {
7853         git_feed('rss');
7854 }
7855
7856 sub git_atom {
7857         git_feed('atom');
7858 }
7859
7860 sub git_opml {
7861         my @list = git_get_projects_list();
7862         if (!@list) {
7863                 die_error(404, "No projects found");
7864         }
7865
7866         print $cgi->header(
7867                 -type => 'text/xml',
7868                 -charset => 'utf-8',
7869                 -content_disposition => 'inline; filename="opml.xml"');
7870
7871         my $title = esc_html($site_name);
7872         print <<XML;
7873 <?xml version="1.0" encoding="utf-8"?>
7874 <opml version="1.0">
7875 <head>
7876   <title>$title OPML Export</title>
7877 </head>
7878 <body>
7879 <outline text="git RSS feeds">
7880 XML
7881
7882         foreach my $pr (@list) {
7883                 my %proj = %$pr;
7884                 my $head = git_get_head_hash($proj{'path'});
7885                 if (!defined $head) {
7886                         next;
7887                 }
7888                 $git_dir = "$projectroot/$proj{'path'}";
7889                 my %co = parse_commit($head);
7890                 if (!%co) {
7891                         next;
7892                 }
7893
7894                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7895                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7896                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7897                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7898         }
7899         print <<XML;
7900 </outline>
7901 </body>
7902 </opml>
7903 XML
7904 }