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 $paranoid = shift;
2834         my @list;
2835
2836         if (-d $projects_list) {
2837                 # search in directory
2838                 my $dir = $projects_list;
2839                 # remove the trailing "/"
2840                 $dir =~ s!/+$!!;
2841                 my $pfxlen = length("$dir");
2842                 my $pfxdepth = ($dir =~ tr!/!!);
2843                 # when filtering, search only given subdirectory
2844                 if ($filter && !$paranoid) {
2845                         $dir .= "/$filter";
2846                         $dir =~ s!/+$!!;
2847                 }
2848
2849                 File::Find::find({
2850                         follow_fast => 1, # follow symbolic links
2851                         follow_skip => 2, # ignore duplicates
2852                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2853                         wanted => sub {
2854                                 # global variables
2855                                 our $project_maxdepth;
2856                                 our $projectroot;
2857                                 # skip project-list toplevel, if we get it.
2858                                 return if (m!^[/.]$!);
2859                                 # only directories can be git repositories
2860                                 return unless (-d $_);
2861                                 # don't traverse too deep (Find is super slow on os x)
2862                                 # $project_maxdepth excludes depth of $projectroot
2863                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2864                                         $File::Find::prune = 1;
2865                                         return;
2866                                 }
2867
2868                                 my $path = substr($File::Find::name, $pfxlen + 1);
2869                                 # paranoidly only filter here
2870                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2871                                         next;
2872                                 }
2873                                 # we check related file in $projectroot
2874                                 if (check_export_ok("$projectroot/$path")) {
2875                                         push @list, { path => $path };
2876                                         $File::Find::prune = 1;
2877                                 }
2878                         },
2879                 }, "$dir");
2880
2881         } elsif (-f $projects_list) {
2882                 # read from file(url-encoded):
2883                 # 'git%2Fgit.git Linus+Torvalds'
2884                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2885                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2886                 open my $fd, '<', $projects_list or return;
2887         PROJECT:
2888                 while (my $line = <$fd>) {
2889                         chomp $line;
2890                         my ($path, $owner) = split ' ', $line;
2891                         $path = unescape($path);
2892                         $owner = unescape($owner);
2893                         if (!defined $path) {
2894                                 next;
2895                         }
2896                         # if $filter is rpovided, check if $path begins with $filter
2897                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2898                                 next;
2899                         }
2900                         if (check_export_ok("$projectroot/$path")) {
2901                                 my $pr = {
2902                                         path => $path,
2903                                         owner => to_utf8($owner),
2904                                 };
2905                                 push @list, $pr;
2906                         }
2907                 }
2908                 close $fd;
2909         }
2910         return @list;
2911 }
2912
2913 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2914 # as side effects it sets 'forks' field to list of forks for forked projects
2915 sub filter_forks_from_projects_list {
2916         my $projects = shift;
2917
2918         my %trie; # prefix tree of directories (path components)
2919         # generate trie out of those directories that might contain forks
2920         foreach my $pr (@$projects) {
2921                 my $path = $pr->{'path'};
2922                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2923                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2924                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2925                 next unless (-d "$projectroot/$path"); # containing directory exists
2926                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2927
2928                 # add to trie
2929                 my @dirs = split('/', $path);
2930                 # walk the trie, until either runs out of components or out of trie
2931                 my $ref = \%trie;
2932                 while (scalar @dirs &&
2933                        exists($ref->{$dirs[0]})) {
2934                         $ref = $ref->{shift @dirs};
2935                 }
2936                 # create rest of trie structure from rest of components
2937                 foreach my $dir (@dirs) {
2938                         $ref = $ref->{$dir} = {};
2939                 }
2940                 # create end marker, store $pr as a data
2941                 $ref->{''} = $pr if (!exists $ref->{''});
2942         }
2943
2944         # filter out forks, by finding shortest prefix match for paths
2945         my @filtered;
2946  PROJECT:
2947         foreach my $pr (@$projects) {
2948                 # trie lookup
2949                 my $ref = \%trie;
2950         DIR:
2951                 foreach my $dir (split('/', $pr->{'path'})) {
2952                         if (exists $ref->{''}) {
2953                                 # found [shortest] prefix, is a fork - skip it
2954                                 push @{$ref->{''}{'forks'}}, $pr;
2955                                 next PROJECT;
2956                         }
2957                         if (!exists $ref->{$dir}) {
2958                                 # not in trie, cannot have prefix, not a fork
2959                                 push @filtered, $pr;
2960                                 next PROJECT;
2961                         }
2962                         # If the dir is there, we just walk one step down the trie.
2963                         $ref = $ref->{$dir};
2964                 }
2965                 # we ran out of trie
2966                 # (shouldn't happen: it's either no match, or end marker)
2967                 push @filtered, $pr;
2968         }
2969
2970         return @filtered;
2971 }
2972
2973 # note: fill_project_list_info must be run first,
2974 # for 'descr_long' and 'ctags' to be filled
2975 sub search_projects_list {
2976         my ($projlist, %opts) = @_;
2977         my $tagfilter  = $opts{'tagfilter'};
2978         my $searchtext = $opts{'searchtext'};
2979
2980         return @$projlist
2981                 unless ($tagfilter || $searchtext);
2982
2983         my @projects;
2984  PROJECT:
2985         foreach my $pr (@$projlist) {
2986
2987                 if ($tagfilter) {
2988                         next unless ref($pr->{'ctags'}) eq 'HASH';
2989                         next unless
2990                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2991                 }
2992
2993                 if ($searchtext) {
2994                         next unless
2995                                 $pr->{'path'} =~ /$searchtext/ ||
2996                                 $pr->{'descr_long'} =~ /$searchtext/;
2997                 }
2998
2999                 push @projects, $pr;
3000         }
3001
3002         return @projects;
3003 }
3004
3005 our $gitweb_project_owner = undef;
3006 sub git_get_project_list_from_file {
3007
3008         return if (defined $gitweb_project_owner);
3009
3010         $gitweb_project_owner = {};
3011         # read from file (url-encoded):
3012         # 'git%2Fgit.git Linus+Torvalds'
3013         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3014         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3015         if (-f $projects_list) {
3016                 open(my $fd, '<', $projects_list);
3017                 while (my $line = <$fd>) {
3018                         chomp $line;
3019                         my ($pr, $ow) = split ' ', $line;
3020                         $pr = unescape($pr);
3021                         $ow = unescape($ow);
3022                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3023                 }
3024                 close $fd;
3025         }
3026 }
3027
3028 sub git_get_project_owner {
3029         my $project = shift;
3030         my $owner;
3031
3032         return undef unless $project;
3033         $git_dir = "$projectroot/$project";
3034
3035         if (!defined $gitweb_project_owner) {
3036                 git_get_project_list_from_file();
3037         }
3038
3039         if (exists $gitweb_project_owner->{$project}) {
3040                 $owner = $gitweb_project_owner->{$project};
3041         }
3042         if (!defined $owner){
3043                 $owner = git_get_project_config('owner');
3044         }
3045         if (!defined $owner) {
3046                 $owner = get_file_owner("$git_dir");
3047         }
3048
3049         return $owner;
3050 }
3051
3052 sub git_get_last_activity {
3053         my ($path) = @_;
3054         my $fd;
3055
3056         $git_dir = "$projectroot/$path";
3057         open($fd, "-|", git_cmd(), 'for-each-ref',
3058              '--format=%(committer)',
3059              '--sort=-committerdate',
3060              '--count=1',
3061              'refs/heads') or return;
3062         my $most_recent = <$fd>;
3063         close $fd or return;
3064         if (defined $most_recent &&
3065             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3066                 my $timestamp = $1;
3067                 my $age = time - $timestamp;
3068                 return ($age, age_string($age));
3069         }
3070         return (undef, undef);
3071 }
3072
3073 # Implementation note: when a single remote is wanted, we cannot use 'git
3074 # remote show -n' because that command always work (assuming it's a remote URL
3075 # if it's not defined), and we cannot use 'git remote show' because that would
3076 # try to make a network roundtrip. So the only way to find if that particular
3077 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3078 # and when we find what we want.
3079 sub git_get_remotes_list {
3080         my $wanted = shift;
3081         my %remotes = ();
3082
3083         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3084         return unless $fd;
3085         while (my $remote = <$fd>) {
3086                 chomp $remote;
3087                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3088                 next if $wanted and not $remote eq $wanted;
3089                 my ($url, $key) = ($1, $2);
3090
3091                 $remotes{$remote} ||= { 'heads' => () };
3092                 $remotes{$remote}{$key} = $url;
3093         }
3094         close $fd or return;
3095         return wantarray ? %remotes : \%remotes;
3096 }
3097
3098 # Takes a hash of remotes as first parameter and fills it by adding the
3099 # available remote heads for each of the indicated remotes.
3100 sub fill_remote_heads {
3101         my $remotes = shift;
3102         my @heads = map { "remotes/$_" } keys %$remotes;
3103         my @remoteheads = git_get_heads_list(undef, @heads);
3104         foreach my $remote (keys %$remotes) {
3105                 $remotes->{$remote}{'heads'} = [ grep {
3106                         $_->{'name'} =~ s!^$remote/!!
3107                         } @remoteheads ];
3108         }
3109 }
3110
3111 sub git_get_references {
3112         my $type = shift || "";
3113         my %refs;
3114         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3115         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3116         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3117                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3118                 or return;
3119
3120         while (my $line = <$fd>) {
3121                 chomp $line;
3122                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3123                         if (defined $refs{$1}) {
3124                                 push @{$refs{$1}}, $2;
3125                         } else {
3126                                 $refs{$1} = [ $2 ];
3127                         }
3128                 }
3129         }
3130         close $fd or return;
3131         return \%refs;
3132 }
3133
3134 sub git_get_rev_name_tags {
3135         my $hash = shift || return undef;
3136
3137         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3138                 or return;
3139         my $name_rev = <$fd>;
3140         close $fd;
3141
3142         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3143                 return $1;
3144         } else {
3145                 # catches also '$hash undefined' output
3146                 return undef;
3147         }
3148 }
3149
3150 ## ----------------------------------------------------------------------
3151 ## parse to hash functions
3152
3153 sub parse_date {
3154         my $epoch = shift;
3155         my $tz = shift || "-0000";
3156
3157         my %date;
3158         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3159         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3160         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3161         $date{'hour'} = $hour;
3162         $date{'minute'} = $min;
3163         $date{'mday'} = $mday;
3164         $date{'day'} = $days[$wday];
3165         $date{'month'} = $months[$mon];
3166         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3167                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3168         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3169                              $mday, $months[$mon], $hour ,$min;
3170         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3171                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3172
3173         my ($tz_sign, $tz_hour, $tz_min) =
3174                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3175         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3176         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3177         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3178         $date{'hour_local'} = $hour;
3179         $date{'minute_local'} = $min;
3180         $date{'tz_local'} = $tz;
3181         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3182                                   1900+$year, $mon+1, $mday,
3183                                   $hour, $min, $sec, $tz);
3184         return %date;
3185 }
3186
3187 sub parse_tag {
3188         my $tag_id = shift;
3189         my %tag;
3190         my @comment;
3191
3192         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3193         $tag{'id'} = $tag_id;
3194         while (my $line = <$fd>) {
3195                 chomp $line;
3196                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3197                         $tag{'object'} = $1;
3198                 } elsif ($line =~ m/^type (.+)$/) {
3199                         $tag{'type'} = $1;
3200                 } elsif ($line =~ m/^tag (.+)$/) {
3201                         $tag{'name'} = $1;
3202                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3203                         $tag{'author'} = $1;
3204                         $tag{'author_epoch'} = $2;
3205                         $tag{'author_tz'} = $3;
3206                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3207                                 $tag{'author_name'}  = $1;
3208                                 $tag{'author_email'} = $2;
3209                         } else {
3210                                 $tag{'author_name'} = $tag{'author'};
3211                         }
3212                 } elsif ($line =~ m/--BEGIN/) {
3213                         push @comment, $line;
3214                         last;
3215                 } elsif ($line eq "") {
3216                         last;
3217                 }
3218         }
3219         push @comment, <$fd>;
3220         $tag{'comment'} = \@comment;
3221         close $fd or return;
3222         if (!defined $tag{'name'}) {
3223                 return
3224         };
3225         return %tag
3226 }
3227
3228 sub parse_commit_text {
3229         my ($commit_text, $withparents) = @_;
3230         my @commit_lines = split '\n', $commit_text;
3231         my %co;
3232
3233         pop @commit_lines; # Remove '\0'
3234
3235         if (! @commit_lines) {
3236                 return;
3237         }
3238
3239         my $header = shift @commit_lines;
3240         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3241                 return;
3242         }
3243         ($co{'id'}, my @parents) = split ' ', $header;
3244         while (my $line = shift @commit_lines) {
3245                 last if $line eq "\n";
3246                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3247                         $co{'tree'} = $1;
3248                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3249                         push @parents, $1;
3250                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3251                         $co{'author'} = to_utf8($1);
3252                         $co{'author_epoch'} = $2;
3253                         $co{'author_tz'} = $3;
3254                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3255                                 $co{'author_name'}  = $1;
3256                                 $co{'author_email'} = $2;
3257                         } else {
3258                                 $co{'author_name'} = $co{'author'};
3259                         }
3260                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3261                         $co{'committer'} = to_utf8($1);
3262                         $co{'committer_epoch'} = $2;
3263                         $co{'committer_tz'} = $3;
3264                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3265                                 $co{'committer_name'}  = $1;
3266                                 $co{'committer_email'} = $2;
3267                         } else {
3268                                 $co{'committer_name'} = $co{'committer'};
3269                         }
3270                 }
3271         }
3272         if (!defined $co{'tree'}) {
3273                 return;
3274         };
3275         $co{'parents'} = \@parents;
3276         $co{'parent'} = $parents[0];
3277
3278         foreach my $title (@commit_lines) {
3279                 $title =~ s/^    //;
3280                 if ($title ne "") {
3281                         $co{'title'} = chop_str($title, 80, 5);
3282                         # remove leading stuff of merges to make the interesting part visible
3283                         if (length($title) > 50) {
3284                                 $title =~ s/^Automatic //;
3285                                 $title =~ s/^merge (of|with) /Merge ... /i;
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/(http|rsync):\/\///;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/(master|www|rsync)\.//;
3291                                 }
3292                                 if (length($title) > 50) {
3293                                         $title =~ s/kernel.org:?//;
3294                                 }
3295                                 if (length($title) > 50) {
3296                                         $title =~ s/\/pub\/scm//;
3297                                 }
3298                         }
3299                         $co{'title_short'} = chop_str($title, 50, 5);
3300                         last;
3301                 }
3302         }
3303         if (! defined $co{'title'} || $co{'title'} eq "") {
3304                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3305         }
3306         # remove added spaces
3307         foreach my $line (@commit_lines) {
3308                 $line =~ s/^    //;
3309         }
3310         $co{'comment'} = \@commit_lines;
3311
3312         my $age = time - $co{'committer_epoch'};
3313         $co{'age'} = $age;
3314         $co{'age_string'} = age_string($age);
3315         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3316         if ($age > 60*60*24*7*2) {
3317                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3318                 $co{'age_string_age'} = $co{'age_string'};
3319         } else {
3320                 $co{'age_string_date'} = $co{'age_string'};
3321                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3322         }
3323         return %co;
3324 }
3325
3326 sub parse_commit {
3327         my ($commit_id) = @_;
3328         my %co;
3329
3330         local $/ = "\0";
3331
3332         open my $fd, "-|", git_cmd(), "rev-list",
3333                 "--parents",
3334                 "--header",
3335                 "--max-count=1",
3336                 $commit_id,
3337                 "--",
3338                 or die_error(500, "Open git-rev-list failed");
3339         %co = parse_commit_text(<$fd>, 1);
3340         close $fd;
3341
3342         return %co;
3343 }
3344
3345 sub parse_commits {
3346         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3347         my @cos;
3348
3349         $maxcount ||= 1;
3350         $skip ||= 0;
3351
3352         local $/ = "\0";
3353
3354         open my $fd, "-|", git_cmd(), "rev-list",
3355                 "--header",
3356                 @args,
3357                 ("--max-count=" . $maxcount),
3358                 ("--skip=" . $skip),
3359                 @extra_options,
3360                 $commit_id,
3361                 "--",
3362                 ($filename ? ($filename) : ())
3363                 or die_error(500, "Open git-rev-list failed");
3364         while (my $line = <$fd>) {
3365                 my %co = parse_commit_text($line);
3366                 push @cos, \%co;
3367         }
3368         close $fd;
3369
3370         return wantarray ? @cos : \@cos;
3371 }
3372
3373 # parse line of git-diff-tree "raw" output
3374 sub parse_difftree_raw_line {
3375         my $line = shift;
3376         my %res;
3377
3378         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3379         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3380         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3381                 $res{'from_mode'} = $1;
3382                 $res{'to_mode'} = $2;
3383                 $res{'from_id'} = $3;
3384                 $res{'to_id'} = $4;
3385                 $res{'status'} = $5;
3386                 $res{'similarity'} = $6;
3387                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3388                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3389                 } else {
3390                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3391                 }
3392         }
3393         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3394         # combined diff (for merge commit)
3395         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3396                 $res{'nparents'}  = length($1);
3397                 $res{'from_mode'} = [ split(' ', $2) ];
3398                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3399                 $res{'from_id'} = [ split(' ', $3) ];
3400                 $res{'to_id'} = pop @{$res{'from_id'}};
3401                 $res{'status'} = [ split('', $4) ];
3402                 $res{'to_file'} = unquote($5);
3403         }
3404         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3405         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3406                 $res{'commit'} = $1;
3407         }
3408
3409         return wantarray ? %res : \%res;
3410 }
3411
3412 # wrapper: return parsed line of git-diff-tree "raw" output
3413 # (the argument might be raw line, or parsed info)
3414 sub parsed_difftree_line {
3415         my $line_or_ref = shift;
3416
3417         if (ref($line_or_ref) eq "HASH") {
3418                 # pre-parsed (or generated by hand)
3419                 return $line_or_ref;
3420         } else {
3421                 return parse_difftree_raw_line($line_or_ref);
3422         }
3423 }
3424
3425 # parse line of git-ls-tree output
3426 sub parse_ls_tree_line {
3427         my $line = shift;
3428         my %opts = @_;
3429         my %res;
3430
3431         if ($opts{'-l'}) {
3432                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3433                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3434
3435                 $res{'mode'} = $1;
3436                 $res{'type'} = $2;
3437                 $res{'hash'} = $3;
3438                 $res{'size'} = $4;
3439                 if ($opts{'-z'}) {
3440                         $res{'name'} = $5;
3441                 } else {
3442                         $res{'name'} = unquote($5);
3443                 }
3444         } else {
3445                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3446                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3447
3448                 $res{'mode'} = $1;
3449                 $res{'type'} = $2;
3450                 $res{'hash'} = $3;
3451                 if ($opts{'-z'}) {
3452                         $res{'name'} = $4;
3453                 } else {
3454                         $res{'name'} = unquote($4);
3455                 }
3456         }
3457
3458         return wantarray ? %res : \%res;
3459 }
3460
3461 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3462 sub parse_from_to_diffinfo {
3463         my ($diffinfo, $from, $to, @parents) = @_;
3464
3465         if ($diffinfo->{'nparents'}) {
3466                 # combined diff
3467                 $from->{'file'} = [];
3468                 $from->{'href'} = [];
3469                 fill_from_file_info($diffinfo, @parents)
3470                         unless exists $diffinfo->{'from_file'};
3471                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3472                         $from->{'file'}[$i] =
3473                                 defined $diffinfo->{'from_file'}[$i] ?
3474                                         $diffinfo->{'from_file'}[$i] :
3475                                         $diffinfo->{'to_file'};
3476                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3477                                 $from->{'href'}[$i] = href(action=>"blob",
3478                                                            hash_base=>$parents[$i],
3479                                                            hash=>$diffinfo->{'from_id'}[$i],
3480                                                            file_name=>$from->{'file'}[$i]);
3481                         } else {
3482                                 $from->{'href'}[$i] = undef;
3483                         }
3484                 }
3485         } else {
3486                 # ordinary (not combined) diff
3487                 $from->{'file'} = $diffinfo->{'from_file'};
3488                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3489                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3490                                                hash=>$diffinfo->{'from_id'},
3491                                                file_name=>$from->{'file'});
3492                 } else {
3493                         delete $from->{'href'};
3494                 }
3495         }
3496
3497         $to->{'file'} = $diffinfo->{'to_file'};
3498         if (!is_deleted($diffinfo)) { # file exists in result
3499                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3500                                      hash=>$diffinfo->{'to_id'},
3501                                      file_name=>$to->{'file'});
3502         } else {
3503                 delete $to->{'href'};
3504         }
3505 }
3506
3507 ## ......................................................................
3508 ## parse to array of hashes functions
3509
3510 sub git_get_heads_list {
3511         my ($limit, @classes) = @_;
3512         @classes = ('heads') unless @classes;
3513         my @patterns = map { "refs/$_" } @classes;
3514         my @headslist;
3515
3516         open my $fd, '-|', git_cmd(), 'for-each-ref',
3517                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3518                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3519                 @patterns
3520                 or return;
3521         while (my $line = <$fd>) {
3522                 my %ref_item;
3523
3524                 chomp $line;
3525                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3526                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3527                 my ($committer, $epoch, $tz) =
3528                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3529                 $ref_item{'fullname'}  = $name;
3530                 $name =~ s!^refs/(?:head|remote)s/!!;
3531
3532                 $ref_item{'name'}  = $name;
3533                 $ref_item{'id'}    = $hash;
3534                 $ref_item{'title'} = $title || '(no commit message)';
3535                 $ref_item{'epoch'} = $epoch;
3536                 if ($epoch) {
3537                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3538                 } else {
3539                         $ref_item{'age'} = "unknown";
3540                 }
3541
3542                 push @headslist, \%ref_item;
3543         }
3544         close $fd;
3545
3546         return wantarray ? @headslist : \@headslist;
3547 }
3548
3549 sub git_get_tags_list {
3550         my $limit = shift;
3551         my @tagslist;
3552
3553         open my $fd, '-|', git_cmd(), 'for-each-ref',
3554                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3555                 '--format=%(objectname) %(objecttype) %(refname) '.
3556                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3557                 'refs/tags'
3558                 or return;
3559         while (my $line = <$fd>) {
3560                 my %ref_item;
3561
3562                 chomp $line;
3563                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3564                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3565                 my ($creator, $epoch, $tz) =
3566                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3567                 $ref_item{'fullname'} = $name;
3568                 $name =~ s!^refs/tags/!!;
3569
3570                 $ref_item{'type'} = $type;
3571                 $ref_item{'id'} = $id;
3572                 $ref_item{'name'} = $name;
3573                 if ($type eq "tag") {
3574                         $ref_item{'subject'} = $title;
3575                         $ref_item{'reftype'} = $reftype;
3576                         $ref_item{'refid'}   = $refid;
3577                 } else {
3578                         $ref_item{'reftype'} = $type;
3579                         $ref_item{'refid'}   = $id;
3580                 }
3581
3582                 if ($type eq "tag" || $type eq "commit") {
3583                         $ref_item{'epoch'} = $epoch;
3584                         if ($epoch) {
3585                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3586                         } else {
3587                                 $ref_item{'age'} = "unknown";
3588                         }
3589                 }
3590
3591                 push @tagslist, \%ref_item;
3592         }
3593         close $fd;
3594
3595         return wantarray ? @tagslist : \@tagslist;
3596 }
3597
3598 ## ----------------------------------------------------------------------
3599 ## filesystem-related functions
3600
3601 sub get_file_owner {
3602         my $path = shift;
3603
3604         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3605         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3606         if (!defined $gcos) {
3607                 return undef;
3608         }
3609         my $owner = $gcos;
3610         $owner =~ s/[,;].*$//;
3611         return to_utf8($owner);
3612 }
3613
3614 # assume that file exists
3615 sub insert_file {
3616         my $filename = shift;
3617
3618         open my $fd, '<', $filename;
3619         print map { to_utf8($_) } <$fd>;
3620         close $fd;
3621 }
3622
3623 ## ......................................................................
3624 ## mimetype related functions
3625
3626 sub mimetype_guess_file {
3627         my $filename = shift;
3628         my $mimemap = shift;
3629         -r $mimemap or return undef;
3630
3631         my %mimemap;
3632         open(my $mh, '<', $mimemap) or return undef;
3633         while (<$mh>) {
3634                 next if m/^#/; # skip comments
3635                 my ($mimetype, @exts) = split(/\s+/);
3636                 foreach my $ext (@exts) {
3637                         $mimemap{$ext} = $mimetype;
3638                 }
3639         }
3640         close($mh);
3641
3642         $filename =~ /\.([^.]*)$/;
3643         return $mimemap{$1};
3644 }
3645
3646 sub mimetype_guess {
3647         my $filename = shift;
3648         my $mime;
3649         $filename =~ /\./ or return undef;
3650
3651         if ($mimetypes_file) {
3652                 my $file = $mimetypes_file;
3653                 if ($file !~ m!^/!) { # if it is relative path
3654                         # it is relative to project
3655                         $file = "$projectroot/$project/$file";
3656                 }
3657                 $mime = mimetype_guess_file($filename, $file);
3658         }
3659         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3660         return $mime;
3661 }
3662
3663 sub blob_mimetype {
3664         my $fd = shift;
3665         my $filename = shift;
3666
3667         if ($filename) {
3668                 my $mime = mimetype_guess($filename);
3669                 $mime and return $mime;
3670         }
3671
3672         # just in case
3673         return $default_blob_plain_mimetype unless $fd;
3674
3675         if (-T $fd) {
3676                 return 'text/plain';
3677         } elsif (! $filename) {
3678                 return 'application/octet-stream';
3679         } elsif ($filename =~ m/\.png$/i) {
3680                 return 'image/png';
3681         } elsif ($filename =~ m/\.gif$/i) {
3682                 return 'image/gif';
3683         } elsif ($filename =~ m/\.jpe?g$/i) {
3684                 return 'image/jpeg';
3685         } else {
3686                 return 'application/octet-stream';
3687         }
3688 }
3689
3690 sub blob_contenttype {
3691         my ($fd, $file_name, $type) = @_;
3692
3693         $type ||= blob_mimetype($fd, $file_name);
3694         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3695                 $type .= "; charset=$default_text_plain_charset";
3696         }
3697
3698         return $type;
3699 }
3700
3701 # guess file syntax for syntax highlighting; return undef if no highlighting
3702 # the name of syntax can (in the future) depend on syntax highlighter used
3703 sub guess_file_syntax {
3704         my ($highlight, $mimetype, $file_name) = @_;
3705         return undef unless ($highlight && defined $file_name);
3706         my $basename = basename($file_name, '.in');
3707         return $highlight_basename{$basename}
3708                 if exists $highlight_basename{$basename};
3709
3710         $basename =~ /\.([^.]*)$/;
3711         my $ext = $1 or return undef;
3712         return $highlight_ext{$ext}
3713                 if exists $highlight_ext{$ext};
3714
3715         return undef;
3716 }
3717
3718 # run highlighter and return FD of its output,
3719 # or return original FD if no highlighting
3720 sub run_highlighter {
3721         my ($fd, $highlight, $syntax) = @_;
3722         return $fd unless ($highlight && defined $syntax);
3723
3724         close $fd;
3725         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3726                   quote_command($highlight_bin).
3727                   " --replace-tabs=8 --fragment --syntax $syntax |"
3728                 or die_error(500, "Couldn't open file or run syntax highlighter");
3729         return $fd;
3730 }
3731
3732 ## ======================================================================
3733 ## functions printing HTML: header, footer, error page
3734
3735 sub get_page_title {
3736         my $title = to_utf8($site_name);
3737
3738         return $title unless (defined $project);
3739         $title .= " - " . to_utf8($project);
3740
3741         return $title unless (defined $action);
3742         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3743
3744         return $title unless (defined $file_name);
3745         $title .= " - " . esc_path($file_name);
3746         if ($action eq "tree" && $file_name !~ m|/$|) {
3747                 $title .= "/";
3748         }
3749
3750         return $title;
3751 }
3752
3753 sub get_content_type_html {
3754         # require explicit support from the UA if we are to send the page as
3755         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3756         # we have to do this because MSIE sometimes globs '*/*', pretending to
3757         # support xhtml+xml but choking when it gets what it asked for.
3758         if (defined $cgi->http('HTTP_ACCEPT') &&
3759             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3760             $cgi->Accept('application/xhtml+xml') != 0) {
3761                 return 'application/xhtml+xml';
3762         } else {
3763                 return 'text/html';
3764         }
3765 }
3766
3767 sub print_feed_meta {
3768         if (defined $project) {
3769                 my %href_params = get_feed_info();
3770                 if (!exists $href_params{'-title'}) {
3771                         $href_params{'-title'} = 'log';
3772                 }
3773
3774                 foreach my $format (qw(RSS Atom)) {
3775                         my $type = lc($format);
3776                         my %link_attr = (
3777                                 '-rel' => 'alternate',
3778                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3779                                 '-type' => "application/$type+xml"
3780                         );
3781
3782                         $href_params{'action'} = $type;
3783                         $link_attr{'-href'} = href(%href_params);
3784                         print "<link ".
3785                               "rel=\"$link_attr{'-rel'}\" ".
3786                               "title=\"$link_attr{'-title'}\" ".
3787                               "href=\"$link_attr{'-href'}\" ".
3788                               "type=\"$link_attr{'-type'}\" ".
3789                               "/>\n";
3790
3791                         $href_params{'extra_options'} = '--no-merges';
3792                         $link_attr{'-href'} = href(%href_params);
3793                         $link_attr{'-title'} .= ' (no merges)';
3794                         print "<link ".
3795                               "rel=\"$link_attr{'-rel'}\" ".
3796                               "title=\"$link_attr{'-title'}\" ".
3797                               "href=\"$link_attr{'-href'}\" ".
3798                               "type=\"$link_attr{'-type'}\" ".
3799                               "/>\n";
3800                 }
3801
3802         } else {
3803                 printf('<link rel="alternate" title="%s projects list" '.
3804                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3805                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3806                 printf('<link rel="alternate" title="%s projects feeds" '.
3807                        'href="%s" type="text/x-opml" />'."\n",
3808                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3809         }
3810 }
3811
3812 sub print_header_links {
3813         my $status = shift;
3814
3815         # print out each stylesheet that exist, providing backwards capability
3816         # for those people who defined $stylesheet in a config file
3817         if (defined $stylesheet) {
3818                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3819         } else {
3820                 foreach my $stylesheet (@stylesheets) {
3821                         next unless $stylesheet;
3822                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3823                 }
3824         }
3825         print_feed_meta()
3826                 if ($status eq '200 OK');
3827         if (defined $favicon) {
3828                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3829         }
3830 }
3831
3832 sub print_nav_breadcrumbs {
3833         my %opts = @_;
3834
3835         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3836         if (defined $project) {
3837                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3838                 if (defined $action) {
3839                         my $action_print = $action ;
3840                         if (defined $opts{-action_extra}) {
3841                                 $action_print = $cgi->a({-href => href(action=>$action)},
3842                                         $action);
3843                         }
3844                         print " / $action_print";
3845                 }
3846                 if (defined $opts{-action_extra}) {
3847                         print " / $opts{-action_extra}";
3848                 }
3849                 print "\n";
3850         }
3851 }
3852
3853 sub print_search_form {
3854         if (!defined $searchtext) {
3855                 $searchtext = "";
3856         }
3857         my $search_hash;
3858         if (defined $hash_base) {
3859                 $search_hash = $hash_base;
3860         } elsif (defined $hash) {
3861                 $search_hash = $hash;
3862         } else {
3863                 $search_hash = "HEAD";
3864         }
3865         my $action = $my_uri;
3866         my $use_pathinfo = gitweb_check_feature('pathinfo');
3867         if ($use_pathinfo) {
3868                 $action .= "/".esc_url($project);
3869         }
3870         print $cgi->startform(-method => "get", -action => $action) .
3871               "<div class=\"search\">\n" .
3872               (!$use_pathinfo &&
3873               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3874               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3875               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3876               $cgi->popup_menu(-name => 'st', -default => 'commit',
3877                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3878               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3879               " search:\n",
3880               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3881               "<span title=\"Extended regular expression\">" .
3882               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3883                              -checked => $search_use_regexp) .
3884               "</span>" .
3885               "</div>" .
3886               $cgi->end_form() . "\n";
3887 }
3888
3889 sub git_header_html {
3890         my $status = shift || "200 OK";
3891         my $expires = shift;
3892         my %opts = @_;
3893
3894         my $title = get_page_title();
3895         my $content_type = get_content_type_html();
3896         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3897                            -status=> $status, -expires => $expires)
3898                 unless ($opts{'-no_http_header'});
3899         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3900         print <<EOF;
3901 <?xml version="1.0" encoding="utf-8"?>
3902 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3903 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3904 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3905 <!-- git core binaries version $git_version -->
3906 <head>
3907 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3908 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3909 <meta name="robots" content="index, nofollow"/>
3910 <title>$title</title>
3911 EOF
3912         # the stylesheet, favicon etc urls won't work correctly with path_info
3913         # unless we set the appropriate base URL
3914         if ($ENV{'PATH_INFO'}) {
3915                 print "<base href=\"".esc_url($base_url)."\" />\n";
3916         }
3917         print_header_links($status);
3918
3919         if (defined $site_html_head_string) {
3920                 print to_utf8($site_html_head_string);
3921         }
3922
3923         print "</head>\n" .
3924               "<body>\n";
3925
3926         if (defined $site_header && -f $site_header) {
3927                 insert_file($site_header);
3928         }
3929
3930         print "<div class=\"page_header\">\n";
3931         if (defined $logo) {
3932                 print $cgi->a({-href => esc_url($logo_url),
3933                                -title => $logo_label},
3934                               $cgi->img({-src => esc_url($logo),
3935                                          -width => 72, -height => 27,
3936                                          -alt => "git",
3937                                          -class => "logo"}));
3938         }
3939         print_nav_breadcrumbs(%opts);
3940         print "</div>\n";
3941
3942         my $have_search = gitweb_check_feature('search');
3943         if (defined $project && $have_search) {
3944                 print_search_form();
3945         }
3946 }
3947
3948 sub git_footer_html {
3949         my $feed_class = 'rss_logo';
3950
3951         print "<div class=\"page_footer\">\n";
3952         if (defined $project) {
3953                 my $descr = git_get_project_description($project);
3954                 if (defined $descr) {
3955                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3956                 }
3957
3958                 my %href_params = get_feed_info();
3959                 if (!%href_params) {
3960                         $feed_class .= ' generic';
3961                 }
3962                 $href_params{'-title'} ||= 'log';
3963
3964                 foreach my $format (qw(RSS Atom)) {
3965                         $href_params{'action'} = lc($format);
3966                         print $cgi->a({-href => href(%href_params),
3967                                       -title => "$href_params{'-title'} $format feed",
3968                                       -class => $feed_class}, $format)."\n";
3969                 }
3970
3971         } else {
3972                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3973                               -class => $feed_class}, "OPML") . " ";
3974                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3975                               -class => $feed_class}, "TXT") . "\n";
3976         }
3977         print "</div>\n"; # class="page_footer"
3978
3979         if (defined $t0 && gitweb_check_feature('timed')) {
3980                 print "<div id=\"generating_info\">\n";
3981                 print 'This page took '.
3982                       '<span id="generating_time" class="time_span">'.
3983                       tv_interval($t0, [ gettimeofday() ]).
3984                       ' seconds </span>'.
3985                       ' and '.
3986                       '<span id="generating_cmd">'.
3987                       $number_of_git_cmds.
3988                       '</span> git commands '.
3989                       " to generate.\n";
3990                 print "</div>\n"; # class="page_footer"
3991         }
3992
3993         if (defined $site_footer && -f $site_footer) {
3994                 insert_file($site_footer);
3995         }
3996
3997         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3998         if (defined $action &&
3999             $action eq 'blame_incremental') {
4000                 print qq!<script type="text/javascript">\n!.
4001                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4002                       qq!           "!. href() .qq!");\n!.
4003                       qq!</script>\n!;
4004         } else {
4005                 my ($jstimezone, $tz_cookie, $datetime_class) =
4006                         gitweb_get_feature('javascript-timezone');
4007
4008                 print qq!<script type="text/javascript">\n!.
4009                       qq!window.onload = function () {\n!;
4010                 if (gitweb_check_feature('javascript-actions')) {
4011                         print qq!       fixLinks();\n!;
4012                 }
4013                 if ($jstimezone && $tz_cookie && $datetime_class) {
4014                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4015                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4016                 }
4017                 print qq!};\n!.
4018                       qq!</script>\n!;
4019         }
4020
4021         print "</body>\n" .
4022               "</html>";
4023 }
4024
4025 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4026 # Example: die_error(404, 'Hash not found')
4027 # By convention, use the following status codes (as defined in RFC 2616):
4028 # 400: Invalid or missing CGI parameters, or
4029 #      requested object exists but has wrong type.
4030 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4031 #      this server or project.
4032 # 404: Requested object/revision/project doesn't exist.
4033 # 500: The server isn't configured properly, or
4034 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4035 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4036 # 503: The server is currently unavailable (because it is overloaded,
4037 #      or down for maintenance).  Generally, this is a temporary state.
4038 sub die_error {
4039         my $status = shift || 500;
4040         my $error = esc_html(shift) || "Internal Server Error";
4041         my $extra = shift;
4042         my %opts = @_;
4043
4044         my %http_responses = (
4045                 400 => '400 Bad Request',
4046                 403 => '403 Forbidden',
4047                 404 => '404 Not Found',
4048                 500 => '500 Internal Server Error',
4049                 503 => '503 Service Unavailable',
4050         );
4051         git_header_html($http_responses{$status}, undef, %opts);
4052         print <<EOF;
4053 <div class="page_body">
4054 <br /><br />
4055 $status - $error
4056 <br />
4057 EOF
4058         if (defined $extra) {
4059                 print "<hr />\n" .
4060                       "$extra\n";
4061         }
4062         print "</div>\n";
4063
4064         git_footer_html();
4065         goto DONE_GITWEB
4066                 unless ($opts{'-error_handler'});
4067 }
4068
4069 ## ----------------------------------------------------------------------
4070 ## functions printing or outputting HTML: navigation
4071
4072 sub git_print_page_nav {
4073         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4074         $extra = '' if !defined $extra; # pager or formats
4075
4076         my @navs = qw(summary shortlog log commit commitdiff tree);
4077         if ($suppress) {
4078                 @navs = grep { $_ ne $suppress } @navs;
4079         }
4080
4081         my %arg = map { $_ => {action=>$_} } @navs;
4082         if (defined $head) {
4083                 for (qw(commit commitdiff)) {
4084                         $arg{$_}{'hash'} = $head;
4085                 }
4086                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4087                         for (qw(shortlog log)) {
4088                                 $arg{$_}{'hash'} = $head;
4089                         }
4090                 }
4091         }
4092
4093         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4094         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4095
4096         my @actions = gitweb_get_feature('actions');
4097         my %repl = (
4098                 '%' => '%',
4099                 'n' => $project,         # project name
4100                 'f' => $git_dir,         # project path within filesystem
4101                 'h' => $treehead || '',  # current hash ('h' parameter)
4102                 'b' => $treebase || '',  # hash base ('hb' parameter)
4103         );
4104         while (@actions) {
4105                 my ($label, $link, $pos) = splice(@actions,0,3);
4106                 # insert
4107                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4108                 # munch munch
4109                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4110                 $arg{$label}{'_href'} = $link;
4111         }
4112
4113         print "<div class=\"page_nav\">\n" .
4114                 (join " | ",
4115                  map { $_ eq $current ?
4116                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4117                  } @navs);
4118         print "<br/>\n$extra<br/>\n" .
4119               "</div>\n";
4120 }
4121
4122 # returns a submenu for the nagivation of the refs views (tags, heads,
4123 # remotes) with the current view disabled and the remotes view only
4124 # available if the feature is enabled
4125 sub format_ref_views {
4126         my ($current) = @_;
4127         my @ref_views = qw{tags heads};
4128         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4129         return join " | ", map {
4130                 $_ eq $current ? $_ :
4131                 $cgi->a({-href => href(action=>$_)}, $_)
4132         } @ref_views
4133 }
4134
4135 sub format_paging_nav {
4136         my ($action, $page, $has_next_link) = @_;
4137         my $paging_nav;
4138
4139
4140         if ($page > 0) {
4141                 $paging_nav .=
4142                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4143                         " &sdot; " .
4144                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4145                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4146         } else {
4147                 $paging_nav .= "first &sdot; prev";
4148         }
4149
4150         if ($has_next_link) {
4151                 $paging_nav .= " &sdot; " .
4152                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4153                                  -accesskey => "n", -title => "Alt-n"}, "next");
4154         } else {
4155                 $paging_nav .= " &sdot; next";
4156         }
4157
4158         return $paging_nav;
4159 }
4160
4161 ## ......................................................................
4162 ## functions printing or outputting HTML: div
4163
4164 sub git_print_header_div {
4165         my ($action, $title, $hash, $hash_base) = @_;
4166         my %args = ();
4167
4168         $args{'action'} = $action;
4169         $args{'hash'} = $hash if $hash;
4170         $args{'hash_base'} = $hash_base if $hash_base;
4171
4172         print "<div class=\"header\">\n" .
4173               $cgi->a({-href => href(%args), -class => "title"},
4174               $title ? $title : $action) .
4175               "\n</div>\n";
4176 }
4177
4178 sub format_repo_url {
4179         my ($name, $url) = @_;
4180         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4181 }
4182
4183 # Group output by placing it in a DIV element and adding a header.
4184 # Options for start_div() can be provided by passing a hash reference as the
4185 # first parameter to the function.
4186 # Options to git_print_header_div() can be provided by passing an array
4187 # reference. This must follow the options to start_div if they are present.
4188 # The content can be a scalar, which is output as-is, a scalar reference, which
4189 # is output after html escaping, an IO handle passed either as *handle or
4190 # *handle{IO}, or a function reference. In the latter case all following
4191 # parameters will be taken as argument to the content function call.
4192 sub git_print_section {
4193         my ($div_args, $header_args, $content);
4194         my $arg = shift;
4195         if (ref($arg) eq 'HASH') {
4196                 $div_args = $arg;
4197                 $arg = shift;
4198         }
4199         if (ref($arg) eq 'ARRAY') {
4200                 $header_args = $arg;
4201                 $arg = shift;
4202         }
4203         $content = $arg;
4204
4205         print $cgi->start_div($div_args);
4206         git_print_header_div(@$header_args);
4207
4208         if (ref($content) eq 'CODE') {
4209                 $content->(@_);
4210         } elsif (ref($content) eq 'SCALAR') {
4211                 print esc_html($$content);
4212         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4213                 print <$content>;
4214         } elsif (!ref($content) && defined($content)) {
4215                 print $content;
4216         }
4217
4218         print $cgi->end_div;
4219 }
4220
4221 sub format_timestamp_html {
4222         my $date = shift;
4223         my $strtime = $date->{'rfc2822'};
4224
4225         my (undef, undef, $datetime_class) =
4226                 gitweb_get_feature('javascript-timezone');
4227         if ($datetime_class) {
4228                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4229         }
4230
4231         my $localtime_format = '(%02d:%02d %s)';
4232         if ($date->{'hour_local'} < 6) {
4233                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4234         }
4235         $strtime .= ' ' .
4236                     sprintf($localtime_format,
4237                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4238
4239         return $strtime;
4240 }
4241
4242 # Outputs the author name and date in long form
4243 sub git_print_authorship {
4244         my $co = shift;
4245         my %opts = @_;
4246         my $tag = $opts{-tag} || 'div';
4247         my $author = $co->{'author_name'};
4248
4249         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4250         print "<$tag class=\"author_date\">" .
4251               format_search_author($author, "author", esc_html($author)) .
4252               " [".format_timestamp_html(\%ad)."]".
4253               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4254               "</$tag>\n";
4255 }
4256
4257 # Outputs table rows containing the full author or committer information,
4258 # in the format expected for 'commit' view (& similar).
4259 # Parameters are a commit hash reference, followed by the list of people
4260 # to output information for. If the list is empty it defaults to both
4261 # author and committer.
4262 sub git_print_authorship_rows {
4263         my $co = shift;
4264         # too bad we can't use @people = @_ || ('author', 'committer')
4265         my @people = @_;
4266         @people = ('author', 'committer') unless @people;
4267         foreach my $who (@people) {
4268                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4269                 print "<tr><td>$who</td><td>" .
4270                       format_search_author($co->{"${who}_name"}, $who,
4271                                            esc_html($co->{"${who}_name"})) . " " .
4272                       format_search_author($co->{"${who}_email"}, $who,
4273                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4274                       "</td><td rowspan=\"2\">" .
4275                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4276                       "</td></tr>\n" .
4277                       "<tr>" .
4278                       "<td></td><td>" .
4279                       format_timestamp_html(\%wd) .
4280                       "</td>" .
4281                       "</tr>\n";
4282         }
4283 }
4284
4285 sub git_print_page_path {
4286         my $name = shift;
4287         my $type = shift;
4288         my $hb = shift;
4289
4290
4291         print "<div class=\"page_path\">";
4292         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4293                       -title => 'tree root'}, to_utf8("[$project]"));
4294         print " / ";
4295         if (defined $name) {
4296                 my @dirname = split '/', $name;
4297                 my $basename = pop @dirname;
4298                 my $fullname = '';
4299
4300                 foreach my $dir (@dirname) {
4301                         $fullname .= ($fullname ? '/' : '') . $dir;
4302                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4303                                                      hash_base=>$hb),
4304                                       -title => $fullname}, esc_path($dir));
4305                         print " / ";
4306                 }
4307                 if (defined $type && $type eq 'blob') {
4308                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4309                                                      hash_base=>$hb),
4310                                       -title => $name}, esc_path($basename));
4311                 } elsif (defined $type && $type eq 'tree') {
4312                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4313                                                      hash_base=>$hb),
4314                                       -title => $name}, esc_path($basename));
4315                         print " / ";
4316                 } else {
4317                         print esc_path($basename);
4318                 }
4319         }
4320         print "<br/></div>\n";
4321 }
4322
4323 sub git_print_log {
4324         my $log = shift;
4325         my %opts = @_;
4326
4327         if ($opts{'-remove_title'}) {
4328                 # remove title, i.e. first line of log
4329                 shift @$log;
4330         }
4331         # remove leading empty lines
4332         while (defined $log->[0] && $log->[0] eq "") {
4333                 shift @$log;
4334         }
4335
4336         # print log
4337         my $signoff = 0;
4338         my $empty = 0;
4339         foreach my $line (@$log) {
4340                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4341                         $signoff = 1;
4342                         $empty = 0;
4343                         if (! $opts{'-remove_signoff'}) {
4344                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4345                                 next;
4346                         } else {
4347                                 # remove signoff lines
4348                                 next;
4349                         }
4350                 } else {
4351                         $signoff = 0;
4352                 }
4353
4354                 # print only one empty line
4355                 # do not print empty line after signoff
4356                 if ($line eq "") {
4357                         next if ($empty || $signoff);
4358                         $empty = 1;
4359                 } else {
4360                         $empty = 0;
4361                 }
4362
4363                 print format_log_line_html($line) . "<br/>\n";
4364         }
4365
4366         if ($opts{'-final_empty_line'}) {
4367                 # end with single empty line
4368                 print "<br/>\n" unless $empty;
4369         }
4370 }
4371
4372 # return link target (what link points to)
4373 sub git_get_link_target {
4374         my $hash = shift;
4375         my $link_target;
4376
4377         # read link
4378         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4379                 or return;
4380         {
4381                 local $/ = undef;
4382                 $link_target = <$fd>;
4383         }
4384         close $fd
4385                 or return;
4386
4387         return $link_target;
4388 }
4389
4390 # given link target, and the directory (basedir) the link is in,
4391 # return target of link relative to top directory (top tree);
4392 # return undef if it is not possible (including absolute links).
4393 sub normalize_link_target {
4394         my ($link_target, $basedir) = @_;
4395
4396         # absolute symlinks (beginning with '/') cannot be normalized
4397         return if (substr($link_target, 0, 1) eq '/');
4398
4399         # normalize link target to path from top (root) tree (dir)
4400         my $path;
4401         if ($basedir) {
4402                 $path = $basedir . '/' . $link_target;
4403         } else {
4404                 # we are in top (root) tree (dir)
4405                 $path = $link_target;
4406         }
4407
4408         # remove //, /./, and /../
4409         my @path_parts;
4410         foreach my $part (split('/', $path)) {
4411                 # discard '.' and ''
4412                 next if (!$part || $part eq '.');
4413                 # handle '..'
4414                 if ($part eq '..') {
4415                         if (@path_parts) {
4416                                 pop @path_parts;
4417                         } else {
4418                                 # link leads outside repository (outside top dir)
4419                                 return;
4420                         }
4421                 } else {
4422                         push @path_parts, $part;
4423                 }
4424         }
4425         $path = join('/', @path_parts);
4426
4427         return $path;
4428 }
4429
4430 # print tree entry (row of git_tree), but without encompassing <tr> element
4431 sub git_print_tree_entry {
4432         my ($t, $basedir, $hash_base, $have_blame) = @_;
4433
4434         my %base_key = ();
4435         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4436
4437         # The format of a table row is: mode list link.  Where mode is
4438         # the mode of the entry, list is the name of the entry, an href,
4439         # and link is the action links of the entry.
4440
4441         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4442         if (exists $t->{'size'}) {
4443                 print "<td class=\"size\">$t->{'size'}</td>\n";
4444         }
4445         if ($t->{'type'} eq "blob") {
4446                 print "<td class=\"list\">" .
4447                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4448                                                file_name=>"$basedir$t->{'name'}", %base_key),
4449                                 -class => "list"}, esc_path($t->{'name'}));
4450                 if (S_ISLNK(oct $t->{'mode'})) {
4451                         my $link_target = git_get_link_target($t->{'hash'});
4452                         if ($link_target) {
4453                                 my $norm_target = normalize_link_target($link_target, $basedir);
4454                                 if (defined $norm_target) {
4455                                         print " -> " .
4456                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4457                                                                      file_name=>$norm_target),
4458                                                        -title => $norm_target}, esc_path($link_target));
4459                                 } else {
4460                                         print " -> " . esc_path($link_target);
4461                                 }
4462                         }
4463                 }
4464                 print "</td>\n";
4465                 print "<td class=\"link\">";
4466                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4467                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4468                               "blob");
4469                 if ($have_blame) {
4470                         print " | " .
4471                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4472                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4473                                       "blame");
4474                 }
4475                 if (defined $hash_base) {
4476                         print " | " .
4477                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4478                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4479                                       "history");
4480                 }
4481                 print " | " .
4482                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4483                                                file_name=>"$basedir$t->{'name'}")},
4484                                 "raw");
4485                 print "</td>\n";
4486
4487         } elsif ($t->{'type'} eq "tree") {
4488                 print "<td class=\"list\">";
4489                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4490                                              file_name=>"$basedir$t->{'name'}",
4491                                              %base_key)},
4492                               esc_path($t->{'name'}));
4493                 print "</td>\n";
4494                 print "<td class=\"link\">";
4495                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4496                                              file_name=>"$basedir$t->{'name'}",
4497                                              %base_key)},
4498                               "tree");
4499                 if (defined $hash_base) {
4500                         print " | " .
4501                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4502                                                      file_name=>"$basedir$t->{'name'}")},
4503                                       "history");
4504                 }
4505                 print "</td>\n";
4506         } else {
4507                 # unknown object: we can only present history for it
4508                 # (this includes 'commit' object, i.e. submodule support)
4509                 print "<td class=\"list\">" .
4510                       esc_path($t->{'name'}) .
4511                       "</td>\n";
4512                 print "<td class=\"link\">";
4513                 if (defined $hash_base) {
4514                         print $cgi->a({-href => href(action=>"history",
4515                                                      hash_base=>$hash_base,
4516                                                      file_name=>"$basedir$t->{'name'}")},
4517                                       "history");
4518                 }
4519                 print "</td>\n";
4520         }
4521 }
4522
4523 ## ......................................................................
4524 ## functions printing large fragments of HTML
4525
4526 # get pre-image filenames for merge (combined) diff
4527 sub fill_from_file_info {
4528         my ($diff, @parents) = @_;
4529
4530         $diff->{'from_file'} = [ ];
4531         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4532         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4533                 if ($diff->{'status'}[$i] eq 'R' ||
4534                     $diff->{'status'}[$i] eq 'C') {
4535                         $diff->{'from_file'}[$i] =
4536                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4537                 }
4538         }
4539
4540         return $diff;
4541 }
4542
4543 # is current raw difftree line of file deletion
4544 sub is_deleted {
4545         my $diffinfo = shift;
4546
4547         return $diffinfo->{'to_id'} eq ('0' x 40);
4548 }
4549
4550 # does patch correspond to [previous] difftree raw line
4551 # $diffinfo  - hashref of parsed raw diff format
4552 # $patchinfo - hashref of parsed patch diff format
4553 #              (the same keys as in $diffinfo)
4554 sub is_patch_split {
4555         my ($diffinfo, $patchinfo) = @_;
4556
4557         return defined $diffinfo && defined $patchinfo
4558                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4559 }
4560
4561
4562 sub git_difftree_body {
4563         my ($difftree, $hash, @parents) = @_;
4564         my ($parent) = $parents[0];
4565         my $have_blame = gitweb_check_feature('blame');
4566         print "<div class=\"list_head\">\n";
4567         if ($#{$difftree} > 10) {
4568                 print(($#{$difftree} + 1) . " files changed:\n");
4569         }
4570         print "</div>\n";
4571
4572         print "<table class=\"" .
4573               (@parents > 1 ? "combined " : "") .
4574               "diff_tree\">\n";
4575
4576         # header only for combined diff in 'commitdiff' view
4577         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4578         if ($has_header) {
4579                 # table header
4580                 print "<thead><tr>\n" .
4581                        "<th></th><th></th>\n"; # filename, patchN link
4582                 for (my $i = 0; $i < @parents; $i++) {
4583                         my $par = $parents[$i];
4584                         print "<th>" .
4585                               $cgi->a({-href => href(action=>"commitdiff",
4586                                                      hash=>$hash, hash_parent=>$par),
4587                                        -title => 'commitdiff to parent number ' .
4588                                                   ($i+1) . ': ' . substr($par,0,7)},
4589                                       $i+1) .
4590                               "&nbsp;</th>\n";
4591                 }
4592                 print "</tr></thead>\n<tbody>\n";
4593         }
4594
4595         my $alternate = 1;
4596         my $patchno = 0;
4597         foreach my $line (@{$difftree}) {
4598                 my $diff = parsed_difftree_line($line);
4599
4600                 if ($alternate) {
4601                         print "<tr class=\"dark\">\n";
4602                 } else {
4603                         print "<tr class=\"light\">\n";
4604                 }
4605                 $alternate ^= 1;
4606
4607                 if (exists $diff->{'nparents'}) { # combined diff
4608
4609                         fill_from_file_info($diff, @parents)
4610                                 unless exists $diff->{'from_file'};
4611
4612                         if (!is_deleted($diff)) {
4613                                 # file exists in the result (child) commit
4614                                 print "<td>" .
4615                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4616                                                              file_name=>$diff->{'to_file'},
4617                                                              hash_base=>$hash),
4618                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4619                                       "</td>\n";
4620                         } else {
4621                                 print "<td>" .
4622                                       esc_path($diff->{'to_file'}) .
4623                                       "</td>\n";
4624                         }
4625
4626                         if ($action eq 'commitdiff') {
4627                                 # link to patch
4628                                 $patchno++;
4629                                 print "<td class=\"link\">" .
4630                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4631                                               "patch") .
4632                                       " | " .
4633                                       "</td>\n";
4634                         }
4635
4636                         my $has_history = 0;
4637                         my $not_deleted = 0;
4638                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4639                                 my $hash_parent = $parents[$i];
4640                                 my $from_hash = $diff->{'from_id'}[$i];
4641                                 my $from_path = $diff->{'from_file'}[$i];
4642                                 my $status = $diff->{'status'}[$i];
4643
4644                                 $has_history ||= ($status ne 'A');
4645                                 $not_deleted ||= ($status ne 'D');
4646
4647                                 if ($status eq 'A') {
4648                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4649                                 } elsif ($status eq 'D') {
4650                                         print "<td class=\"link\">" .
4651                                               $cgi->a({-href => href(action=>"blob",
4652                                                                      hash_base=>$hash,
4653                                                                      hash=>$from_hash,
4654                                                                      file_name=>$from_path)},
4655                                                       "blob" . ($i+1)) .
4656                                               " | </td>\n";
4657                                 } else {
4658                                         if ($diff->{'to_id'} eq $from_hash) {
4659                                                 print "<td class=\"link nochange\">";
4660                                         } else {
4661                                                 print "<td class=\"link\">";
4662                                         }
4663                                         print $cgi->a({-href => href(action=>"blobdiff",
4664                                                                      hash=>$diff->{'to_id'},
4665                                                                      hash_parent=>$from_hash,
4666                                                                      hash_base=>$hash,
4667                                                                      hash_parent_base=>$hash_parent,
4668                                                                      file_name=>$diff->{'to_file'},
4669                                                                      file_parent=>$from_path)},
4670                                                       "diff" . ($i+1)) .
4671                                               " | </td>\n";
4672                                 }
4673                         }
4674
4675                         print "<td class=\"link\">";
4676                         if ($not_deleted) {
4677                                 print $cgi->a({-href => href(action=>"blob",
4678                                                              hash=>$diff->{'to_id'},
4679                                                              file_name=>$diff->{'to_file'},
4680                                                              hash_base=>$hash)},
4681                                               "blob");
4682                                 print " | " if ($has_history);
4683                         }
4684                         if ($has_history) {
4685                                 print $cgi->a({-href => href(action=>"history",
4686                                                              file_name=>$diff->{'to_file'},
4687                                                              hash_base=>$hash)},
4688                                               "history");
4689                         }
4690                         print "</td>\n";
4691
4692                         print "</tr>\n";
4693                         next; # instead of 'else' clause, to avoid extra indent
4694                 }
4695                 # else ordinary diff
4696
4697                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4698                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4699                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4700                         $to_mode_oct = oct $diff->{'to_mode'};
4701                         if (S_ISREG($to_mode_oct)) { # only for regular file
4702                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4703                         }
4704                         $to_file_type = file_type($diff->{'to_mode'});
4705                 }
4706                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4707                         $from_mode_oct = oct $diff->{'from_mode'};
4708                         if (S_ISREG($from_mode_oct)) { # only for regular file
4709                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4710                         }
4711                         $from_file_type = file_type($diff->{'from_mode'});
4712                 }
4713
4714                 if ($diff->{'status'} eq "A") { # created
4715                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4716                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4717                         $mode_chng   .= "]</span>";
4718                         print "<td>";
4719                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4720                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4721                                       -class => "list"}, esc_path($diff->{'file'}));
4722                         print "</td>\n";
4723                         print "<td>$mode_chng</td>\n";
4724                         print "<td class=\"link\">";
4725                         if ($action eq 'commitdiff') {
4726                                 # link to patch
4727                                 $patchno++;
4728                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4729                                               "patch") .
4730                                       " | ";
4731                         }
4732                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4733                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4734                                       "blob");
4735                         print "</td>\n";
4736
4737                 } elsif ($diff->{'status'} eq "D") { # deleted
4738                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4739                         print "<td>";
4740                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4741                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4742                                        -class => "list"}, esc_path($diff->{'file'}));
4743                         print "</td>\n";
4744                         print "<td>$mode_chng</td>\n";
4745                         print "<td class=\"link\">";
4746                         if ($action eq 'commitdiff') {
4747                                 # link to patch
4748                                 $patchno++;
4749                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4750                                               "patch") .
4751                                       " | ";
4752                         }
4753                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4754                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4755                                       "blob") . " | ";
4756                         if ($have_blame) {
4757                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4758                                                              file_name=>$diff->{'file'})},
4759                                               "blame") . " | ";
4760                         }
4761                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4762                                                      file_name=>$diff->{'file'})},
4763                                       "history");
4764                         print "</td>\n";
4765
4766                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4767                         my $mode_chnge = "";
4768                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4769                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4770                                 if ($from_file_type ne $to_file_type) {
4771                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4772                                 }
4773                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4774                                         if ($from_mode_str && $to_mode_str) {
4775                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4776                                         } elsif ($to_mode_str) {
4777                                                 $mode_chnge .= " mode: $to_mode_str";
4778                                         }
4779                                 }
4780                                 $mode_chnge .= "]</span>\n";
4781                         }
4782                         print "<td>";
4783                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4784                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4785                                       -class => "list"}, esc_path($diff->{'file'}));
4786                         print "</td>\n";
4787                         print "<td>$mode_chnge</td>\n";
4788                         print "<td class=\"link\">";
4789                         if ($action eq 'commitdiff') {
4790                                 # link to patch
4791                                 $patchno++;
4792                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4793                                               "patch") .
4794                                       " | ";
4795                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4796                                 # "commit" view and modified file (not onlu mode changed)
4797                                 print $cgi->a({-href => href(action=>"blobdiff",
4798                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4799                                                              hash_base=>$hash, hash_parent_base=>$parent,
4800                                                              file_name=>$diff->{'file'})},
4801                                               "diff") .
4802                                       " | ";
4803                         }
4804                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4805                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4806                                        "blob") . " | ";
4807                         if ($have_blame) {
4808                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4809                                                              file_name=>$diff->{'file'})},
4810                                               "blame") . " | ";
4811                         }
4812                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4813                                                      file_name=>$diff->{'file'})},
4814                                       "history");
4815                         print "</td>\n";
4816
4817                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4818                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4819                         my $nstatus = $status_name{$diff->{'status'}};
4820                         my $mode_chng = "";
4821                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4822                                 # mode also for directories, so we cannot use $to_mode_str
4823                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4824                         }
4825                         print "<td>" .
4826                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4827                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4828                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4829                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4830                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4831                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4832                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4833                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4834                               "<td class=\"link\">";
4835                         if ($action eq 'commitdiff') {
4836                                 # link to patch
4837                                 $patchno++;
4838                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4839                                               "patch") .
4840                                       " | ";
4841                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4842                                 # "commit" view and modified file (not only pure rename or copy)
4843                                 print $cgi->a({-href => href(action=>"blobdiff",
4844                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4845                                                              hash_base=>$hash, hash_parent_base=>$parent,
4846                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4847                                               "diff") .
4848                                       " | ";
4849                         }
4850                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4851                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4852                                       "blob") . " | ";
4853                         if ($have_blame) {
4854                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4855                                                              file_name=>$diff->{'to_file'})},
4856                                               "blame") . " | ";
4857                         }
4858                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4859                                                     file_name=>$diff->{'to_file'})},
4860                                       "history");
4861                         print "</td>\n";
4862
4863                 } # we should not encounter Unmerged (U) or Unknown (X) status
4864                 print "</tr>\n";
4865         }
4866         print "</tbody>" if $has_header;
4867         print "</table>\n";
4868 }
4869
4870 sub print_sidebyside_diff_chunk {
4871         my @chunk = @_;
4872         my (@ctx, @rem, @add);
4873
4874         return unless @chunk;
4875
4876         # incomplete last line might be among removed or added lines,
4877         # or both, or among context lines: find which
4878         for (my $i = 1; $i < @chunk; $i++) {
4879                 if ($chunk[$i][0] eq 'incomplete') {
4880                         $chunk[$i][0] = $chunk[$i-1][0];
4881                 }
4882         }
4883
4884         # guardian
4885         push @chunk, ["", ""];
4886
4887         foreach my $line_info (@chunk) {
4888                 my ($class, $line) = @$line_info;
4889
4890                 # print chunk headers
4891                 if ($class && $class eq 'chunk_header') {
4892                         print $line;
4893                         next;
4894                 }
4895
4896                 ## print from accumulator when type of class of lines change
4897                 # empty contents block on start rem/add block, or end of chunk
4898                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4899                         print join '',
4900                                 '<div class="chunk_block ctx">',
4901                                         '<div class="old">',
4902                                         @ctx,
4903                                         '</div>',
4904                                         '<div class="new">',
4905                                         @ctx,
4906                                         '</div>',
4907                                 '</div>';
4908                         @ctx = ();
4909                 }
4910                 # empty add/rem block on start context block, or end of chunk
4911                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4912                         if (!@add) {
4913                                 # pure removal
4914                                 print join '',
4915                                         '<div class="chunk_block rem">',
4916                                                 '<div class="old">',
4917                                                 @rem,
4918                                                 '</div>',
4919                                         '</div>';
4920                         } elsif (!@rem) {
4921                                 # pure addition
4922                                 print join '',
4923                                         '<div class="chunk_block add">',
4924                                                 '<div class="new">',
4925                                                 @add,
4926                                                 '</div>',
4927                                         '</div>';
4928                         } else {
4929                                 # assume that it is change
4930                                 print join '',
4931                                         '<div class="chunk_block chg">',
4932                                                 '<div class="old">',
4933                                                 @rem,
4934                                                 '</div>',
4935                                                 '<div class="new">',
4936                                                 @add,
4937                                                 '</div>',
4938                                         '</div>';
4939                         }
4940                         @rem = @add = ();
4941                 }
4942
4943                 ## adding lines to accumulator
4944                 # guardian value
4945                 last unless $line;
4946                 # rem, add or change
4947                 if ($class eq 'rem') {
4948                         push @rem, $line;
4949                 } elsif ($class eq 'add') {
4950                         push @add, $line;
4951                 }
4952                 # context line
4953                 if ($class eq 'ctx') {
4954                         push @ctx, $line;
4955                 }
4956         }
4957 }
4958
4959 sub git_patchset_body {
4960         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4961         my ($hash_parent) = $hash_parents[0];
4962
4963         my $is_combined = (@hash_parents > 1);
4964         my $patch_idx = 0;
4965         my $patch_number = 0;
4966         my $patch_line;
4967         my $diffinfo;
4968         my $to_name;
4969         my (%from, %to);
4970         my @chunk; # for side-by-side diff
4971
4972         print "<div class=\"patchset\">\n";
4973
4974         # skip to first patch
4975         while ($patch_line = <$fd>) {
4976                 chomp $patch_line;
4977
4978                 last if ($patch_line =~ m/^diff /);
4979         }
4980
4981  PATCH:
4982         while ($patch_line) {
4983
4984                 # parse "git diff" header line
4985                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4986                         # $1 is from_name, which we do not use
4987                         $to_name = unquote($2);
4988                         $to_name =~ s!^b/!!;
4989                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4990                         # $1 is 'cc' or 'combined', which we do not use
4991                         $to_name = unquote($2);
4992                 } else {
4993                         $to_name = undef;
4994                 }
4995
4996                 # check if current patch belong to current raw line
4997                 # and parse raw git-diff line if needed
4998                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4999                         # this is continuation of a split patch
5000                         print "<div class=\"patch cont\">\n";
5001                 } else {
5002                         # advance raw git-diff output if needed
5003                         $patch_idx++ if defined $diffinfo;
5004
5005                         # read and prepare patch information
5006                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5007
5008                         # compact combined diff output can have some patches skipped
5009                         # find which patch (using pathname of result) we are at now;
5010                         if ($is_combined) {
5011                                 while ($to_name ne $diffinfo->{'to_file'}) {
5012                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5013                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5014                                               "</div>\n";  # class="patch"
5015
5016                                         $patch_idx++;
5017                                         $patch_number++;
5018
5019                                         last if $patch_idx > $#$difftree;
5020                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5021                                 }
5022                         }
5023
5024                         # modifies %from, %to hashes
5025                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5026
5027                         # this is first patch for raw difftree line with $patch_idx index
5028                         # we index @$difftree array from 0, but number patches from 1
5029                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5030                 }
5031
5032                 # git diff header
5033                 #assert($patch_line =~ m/^diff /) if DEBUG;
5034                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5035                 $patch_number++;
5036                 # print "git diff" header
5037                 print format_git_diff_header_line($patch_line, $diffinfo,
5038                                                   \%from, \%to);
5039
5040                 # print extended diff header
5041                 print "<div class=\"diff extended_header\">\n";
5042         EXTENDED_HEADER:
5043                 while ($patch_line = <$fd>) {
5044                         chomp $patch_line;
5045
5046                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5047
5048                         print format_extended_diff_header_line($patch_line, $diffinfo,
5049                                                                \%from, \%to);
5050                 }
5051                 print "</div>\n"; # class="diff extended_header"
5052
5053                 # from-file/to-file diff header
5054                 if (! $patch_line) {
5055                         print "</div>\n"; # class="patch"
5056                         last PATCH;
5057                 }
5058                 next PATCH if ($patch_line =~ m/^diff /);
5059                 #assert($patch_line =~ m/^---/) if DEBUG;
5060
5061                 my $last_patch_line = $patch_line;
5062                 $patch_line = <$fd>;
5063                 chomp $patch_line;
5064                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5065
5066                 print format_diff_from_to_header($last_patch_line, $patch_line,
5067                                                  $diffinfo, \%from, \%to,
5068                                                  @hash_parents);
5069
5070                 # the patch itself
5071         LINE:
5072                 while ($patch_line = <$fd>) {
5073                         chomp $patch_line;
5074
5075                         next PATCH if ($patch_line =~ m/^diff /);
5076
5077                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5078                         my $diff_classes = "diff";
5079                         $diff_classes .= " $class" if ($class);
5080                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5081
5082                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5083                                 if ($class eq 'chunk_header') {
5084                                         print_sidebyside_diff_chunk(@chunk);
5085                                         @chunk = ( [ $class, $line ] );
5086                                 } else {
5087                                         push @chunk, [ $class, $line ];
5088                                 }
5089                         } else {
5090                                 # default 'inline' style and unknown styles
5091                                 print $line;
5092                         }
5093                 }
5094
5095         } continue {
5096                 if (@chunk) {
5097                         print_sidebyside_diff_chunk(@chunk);
5098                         @chunk = ();
5099                 }
5100                 print "</div>\n"; # class="patch"
5101         }
5102
5103         # for compact combined (--cc) format, with chunk and patch simplification
5104         # the patchset might be empty, but there might be unprocessed raw lines
5105         for (++$patch_idx if $patch_number > 0;
5106              $patch_idx < @$difftree;
5107              ++$patch_idx) {
5108                 # read and prepare patch information
5109                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5110
5111                 # generate anchor for "patch" links in difftree / whatchanged part
5112                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5113                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5114                       "</div>\n";  # class="patch"
5115
5116                 $patch_number++;
5117         }
5118
5119         if ($patch_number == 0) {
5120                 if (@hash_parents > 1) {
5121                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5122                 } else {
5123                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5124                 }
5125         }
5126
5127         print "</div>\n"; # class="patchset"
5128 }
5129
5130 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5131
5132 # fills project list info (age, description, owner, category, forks)
5133 # for each project in the list, removing invalid projects from
5134 # returned list
5135 # NOTE: modifies $projlist, but does not remove entries from it
5136 sub fill_project_list_info {
5137         my $projlist = shift;
5138         my @projects;
5139
5140         my $show_ctags = gitweb_check_feature('ctags');
5141  PROJECT:
5142         foreach my $pr (@$projlist) {
5143                 my (@activity) = git_get_last_activity($pr->{'path'});
5144                 unless (@activity) {
5145                         next PROJECT;
5146                 }
5147                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5148                 if (!defined $pr->{'descr'}) {
5149                         my $descr = git_get_project_description($pr->{'path'}) || "";
5150                         $descr = to_utf8($descr);
5151                         $pr->{'descr_long'} = $descr;
5152                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5153                 }
5154                 if (!defined $pr->{'owner'}) {
5155                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5156                 }
5157                 if ($show_ctags) {
5158                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5159                 }
5160                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5161                         my $cat = git_get_project_category($pr->{'path'}) ||
5162                                                            $project_list_default_category;
5163                         $pr->{'category'} = to_utf8($cat);
5164                 }
5165
5166                 push @projects, $pr;
5167         }
5168
5169         return @projects;
5170 }
5171
5172 sub sort_projects_list {
5173         my ($projlist, $order) = @_;
5174         my @projects;
5175
5176         my %order_info = (
5177                 project => { key => 'path', type => 'str' },
5178                 descr => { key => 'descr_long', type => 'str' },
5179                 owner => { key => 'owner', type => 'str' },
5180                 age => { key => 'age', type => 'num' }
5181         );
5182         my $oi = $order_info{$order};
5183         return @$projlist unless defined $oi;
5184         if ($oi->{'type'} eq 'str') {
5185                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5186         } else {
5187                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5188         }
5189
5190         return @projects;
5191 }
5192
5193 # returns a hash of categories, containing the list of project
5194 # belonging to each category
5195 sub build_projlist_by_category {
5196         my ($projlist, $from, $to) = @_;
5197         my %categories;
5198
5199         $from = 0 unless defined $from;
5200         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5201
5202         for (my $i = $from; $i <= $to; $i++) {
5203                 my $pr = $projlist->[$i];
5204                 push @{$categories{ $pr->{'category'} }}, $pr;
5205         }
5206
5207         return wantarray ? %categories : \%categories;
5208 }
5209
5210 # print 'sort by' <th> element, generating 'sort by $name' replay link
5211 # if that order is not selected
5212 sub print_sort_th {
5213         print format_sort_th(@_);
5214 }
5215
5216 sub format_sort_th {
5217         my ($name, $order, $header) = @_;
5218         my $sort_th = "";
5219         $header ||= ucfirst($name);
5220
5221         if ($order eq $name) {
5222                 $sort_th .= "<th>$header</th>\n";
5223         } else {
5224                 $sort_th .= "<th>" .
5225                             $cgi->a({-href => href(-replay=>1, order=>$name),
5226                                      -class => "header"}, $header) .
5227                             "</th>\n";
5228         }
5229
5230         return $sort_th;
5231 }
5232
5233 sub git_project_list_rows {
5234         my ($projlist, $from, $to, $check_forks) = @_;
5235
5236         $from = 0 unless defined $from;
5237         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5238
5239         my $alternate = 1;
5240         for (my $i = $from; $i <= $to; $i++) {
5241                 my $pr = $projlist->[$i];
5242
5243                 if ($alternate) {
5244                         print "<tr class=\"dark\">\n";
5245                 } else {
5246                         print "<tr class=\"light\">\n";
5247                 }
5248                 $alternate ^= 1;
5249
5250                 if ($check_forks) {
5251                         print "<td>";
5252                         if ($pr->{'forks'}) {
5253                                 my $nforks = scalar @{$pr->{'forks'}};
5254                                 if ($nforks > 0) {
5255                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5256                                                        -title => "$nforks forks"}, "+");
5257                                 } else {
5258                                         print $cgi->span({-title => "$nforks forks"}, "+");
5259                                 }
5260                         }
5261                         print "</td>\n";
5262                 }
5263                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5264                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5265                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5266                                         -class => "list", -title => $pr->{'descr_long'}},
5267                                         esc_html($pr->{'descr'})) . "</td>\n" .
5268                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5269                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5270                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5271                       "<td class=\"link\">" .
5272                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5273                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5274                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5275                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5276                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5277                       "</td>\n" .
5278                       "</tr>\n";
5279         }
5280 }
5281
5282 sub git_project_list_body {
5283         # actually uses global variable $project
5284         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5285         my @projects = @$projlist;
5286
5287         my $check_forks = gitweb_check_feature('forks');
5288         my $show_ctags  = gitweb_check_feature('ctags');
5289         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5290         $check_forks = undef
5291                 if ($tagfilter || $searchtext);
5292
5293         # filtering out forks before filling info allows to do less work
5294         @projects = filter_forks_from_projects_list(\@projects)
5295                 if ($check_forks);
5296         @projects = fill_project_list_info(\@projects);
5297         # searching projects require filling to be run before it
5298         @projects = search_projects_list(\@projects,
5299                                          'searchtext' => $searchtext,
5300                                          'tagfilter'  => $tagfilter)
5301                 if ($tagfilter || $searchtext);
5302
5303         $order ||= $default_projects_order;
5304         $from = 0 unless defined $from;
5305         $to = $#projects if (!defined $to || $#projects < $to);
5306
5307         # short circuit
5308         if ($from > $to) {
5309                 print "<center>\n".
5310                       "<b>No such projects found</b><br />\n".
5311                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5312                       "</center>\n<br />\n";
5313                 return;
5314         }
5315
5316         @projects = sort_projects_list(\@projects, $order);
5317
5318         if ($show_ctags) {
5319                 my $ctags = git_gather_all_ctags(\@projects);
5320                 my $cloud = git_populate_project_tagcloud($ctags);
5321                 print git_show_project_tagcloud($cloud, 64);
5322         }
5323
5324         print "<table class=\"project_list\">\n";
5325         unless ($no_header) {
5326                 print "<tr>\n";
5327                 if ($check_forks) {
5328                         print "<th></th>\n";
5329                 }
5330                 print_sort_th('project', $order, 'Project');
5331                 print_sort_th('descr', $order, 'Description');
5332                 print_sort_th('owner', $order, 'Owner');
5333                 print_sort_th('age', $order, 'Last Change');
5334                 print "<th></th>\n" . # for links
5335                       "</tr>\n";
5336         }
5337
5338         if ($projects_list_group_categories) {
5339                 # only display categories with projects in the $from-$to window
5340                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5341                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5342                 foreach my $cat (sort keys %categories) {
5343                         unless ($cat eq "") {
5344                                 print "<tr>\n";
5345                                 if ($check_forks) {
5346                                         print "<td></td>\n";
5347                                 }
5348                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5349                                 print "</tr>\n";
5350                         }
5351
5352                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5353                 }
5354         } else {
5355                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5356         }
5357
5358         if (defined $extra) {
5359                 print "<tr>\n";
5360                 if ($check_forks) {
5361                         print "<td></td>\n";
5362                 }
5363                 print "<td colspan=\"5\">$extra</td>\n" .
5364                       "</tr>\n";
5365         }
5366         print "</table>\n";
5367 }
5368
5369 sub git_log_body {
5370         # uses global variable $project
5371         my ($commitlist, $from, $to, $refs, $extra) = @_;
5372
5373         $from = 0 unless defined $from;
5374         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5375
5376         for (my $i = 0; $i <= $to; $i++) {
5377                 my %co = %{$commitlist->[$i]};
5378                 next if !%co;
5379                 my $commit = $co{'id'};
5380                 my $ref = format_ref_marker($refs, $commit);
5381                 git_print_header_div('commit',
5382                                "<span class=\"age\">$co{'age_string'}</span>" .
5383                                esc_html($co{'title'}) . $ref,
5384                                $commit);
5385                 print "<div class=\"title_text\">\n" .
5386                       "<div class=\"log_link\">\n" .
5387                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5388                       " | " .
5389                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5390                       " | " .
5391                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5392                       "<br/>\n" .
5393                       "</div>\n";
5394                       git_print_authorship(\%co, -tag => 'span');
5395                       print "<br/>\n</div>\n";
5396
5397                 print "<div class=\"log_body\">\n";
5398                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5399                 print "</div>\n";
5400         }
5401         if ($extra) {
5402                 print "<div class=\"page_nav\">\n";
5403                 print "$extra\n";
5404                 print "</div>\n";
5405         }
5406 }
5407
5408 sub git_shortlog_body {
5409         # uses global variable $project
5410         my ($commitlist, $from, $to, $refs, $extra) = @_;
5411
5412         $from = 0 unless defined $from;
5413         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5414
5415         print "<table class=\"shortlog\">\n";
5416         my $alternate = 1;
5417         for (my $i = $from; $i <= $to; $i++) {
5418                 my %co = %{$commitlist->[$i]};
5419                 my $commit = $co{'id'};
5420                 my $ref = format_ref_marker($refs, $commit);
5421                 if ($alternate) {
5422                         print "<tr class=\"dark\">\n";
5423                 } else {
5424                         print "<tr class=\"light\">\n";
5425                 }
5426                 $alternate ^= 1;
5427                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5428                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5429                       format_author_html('td', \%co, 10) . "<td>";
5430                 print format_subject_html($co{'title'}, $co{'title_short'},
5431                                           href(action=>"commit", hash=>$commit), $ref);
5432                 print "</td>\n" .
5433                       "<td class=\"link\">" .
5434                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5435                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5436                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5437                 my $snapshot_links = format_snapshot_links($commit);
5438                 if (defined $snapshot_links) {
5439                         print " | " . $snapshot_links;
5440                 }
5441                 print "</td>\n" .
5442                       "</tr>\n";
5443         }
5444         if (defined $extra) {
5445                 print "<tr>\n" .
5446                       "<td colspan=\"4\">$extra</td>\n" .
5447                       "</tr>\n";
5448         }
5449         print "</table>\n";
5450 }
5451
5452 sub git_history_body {
5453         # Warning: assumes constant type (blob or tree) during history
5454         my ($commitlist, $from, $to, $refs, $extra,
5455             $file_name, $file_hash, $ftype) = @_;
5456
5457         $from = 0 unless defined $from;
5458         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5459
5460         print "<table class=\"history\">\n";
5461         my $alternate = 1;
5462         for (my $i = $from; $i <= $to; $i++) {
5463                 my %co = %{$commitlist->[$i]};
5464                 if (!%co) {
5465                         next;
5466                 }
5467                 my $commit = $co{'id'};
5468
5469                 my $ref = format_ref_marker($refs, $commit);
5470
5471                 if ($alternate) {
5472                         print "<tr class=\"dark\">\n";
5473                 } else {
5474                         print "<tr class=\"light\">\n";
5475                 }
5476                 $alternate ^= 1;
5477                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5478         # shortlog:   format_author_html('td', \%co, 10)
5479                       format_author_html('td', \%co, 15, 3) . "<td>";
5480                 # originally git_history used chop_str($co{'title'}, 50)
5481                 print format_subject_html($co{'title'}, $co{'title_short'},
5482                                           href(action=>"commit", hash=>$commit), $ref);
5483                 print "</td>\n" .
5484                       "<td class=\"link\">" .
5485                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5486                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5487
5488                 if ($ftype eq 'blob') {
5489                         my $blob_current = $file_hash;
5490                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5491                         if (defined $blob_current && defined $blob_parent &&
5492                                         $blob_current ne $blob_parent) {
5493                                 print " | " .
5494                                         $cgi->a({-href => href(action=>"blobdiff",
5495                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5496                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5497                                                                file_name=>$file_name)},
5498                                                 "diff to current");
5499                         }
5500                 }
5501                 print "</td>\n" .
5502                       "</tr>\n";
5503         }
5504         if (defined $extra) {
5505                 print "<tr>\n" .
5506                       "<td colspan=\"4\">$extra</td>\n" .
5507                       "</tr>\n";
5508         }
5509         print "</table>\n";
5510 }
5511
5512 sub git_tags_body {
5513         # uses global variable $project
5514         my ($taglist, $from, $to, $extra) = @_;
5515         $from = 0 unless defined $from;
5516         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5517
5518         print "<table class=\"tags\">\n";
5519         my $alternate = 1;
5520         for (my $i = $from; $i <= $to; $i++) {
5521                 my $entry = $taglist->[$i];
5522                 my %tag = %$entry;
5523                 my $comment = $tag{'subject'};
5524                 my $comment_short;
5525                 if (defined $comment) {
5526                         $comment_short = chop_str($comment, 30, 5);
5527                 }
5528                 if ($alternate) {
5529                         print "<tr class=\"dark\">\n";
5530                 } else {
5531                         print "<tr class=\"light\">\n";
5532                 }
5533                 $alternate ^= 1;
5534                 if (defined $tag{'age'}) {
5535                         print "<td><i>$tag{'age'}</i></td>\n";
5536                 } else {
5537                         print "<td></td>\n";
5538                 }
5539                 print "<td>" .
5540                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5541                                -class => "list name"}, esc_html($tag{'name'})) .
5542                       "</td>\n" .
5543                       "<td>";
5544                 if (defined $comment) {
5545                         print format_subject_html($comment, $comment_short,
5546                                                   href(action=>"tag", hash=>$tag{'id'}));
5547                 }
5548                 print "</td>\n" .
5549                       "<td class=\"selflink\">";
5550                 if ($tag{'type'} eq "tag") {
5551                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5552                 } else {
5553                         print "&nbsp;";
5554                 }
5555                 print "</td>\n" .
5556                       "<td class=\"link\">" . " | " .
5557                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5558                 if ($tag{'reftype'} eq "commit") {
5559                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5560                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5561                 } elsif ($tag{'reftype'} eq "blob") {
5562                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5563                 }
5564                 print "</td>\n" .
5565                       "</tr>";
5566         }
5567         if (defined $extra) {
5568                 print "<tr>\n" .
5569                       "<td colspan=\"5\">$extra</td>\n" .
5570                       "</tr>\n";
5571         }
5572         print "</table>\n";
5573 }
5574
5575 sub git_heads_body {
5576         # uses global variable $project
5577         my ($headlist, $head, $from, $to, $extra) = @_;
5578         $from = 0 unless defined $from;
5579         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5580
5581         print "<table class=\"heads\">\n";
5582         my $alternate = 1;
5583         for (my $i = $from; $i <= $to; $i++) {
5584                 my $entry = $headlist->[$i];
5585                 my %ref = %$entry;
5586                 my $curr = $ref{'id'} eq $head;
5587                 if ($alternate) {
5588                         print "<tr class=\"dark\">\n";
5589                 } else {
5590                         print "<tr class=\"light\">\n";
5591                 }
5592                 $alternate ^= 1;
5593                 print "<td><i>$ref{'age'}</i></td>\n" .
5594                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5595                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5596                                -class => "list name"},esc_html($ref{'name'})) .
5597                       "</td>\n" .
5598                       "<td class=\"link\">" .
5599                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5600                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5601                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5602                       "</td>\n" .
5603                       "</tr>";
5604         }
5605         if (defined $extra) {
5606                 print "<tr>\n" .
5607                       "<td colspan=\"3\">$extra</td>\n" .
5608                       "</tr>\n";
5609         }
5610         print "</table>\n";
5611 }
5612
5613 # Display a single remote block
5614 sub git_remote_block {
5615         my ($remote, $rdata, $limit, $head) = @_;
5616
5617         my $heads = $rdata->{'heads'};
5618         my $fetch = $rdata->{'fetch'};
5619         my $push = $rdata->{'push'};
5620
5621         my $urls_table = "<table class=\"projects_list\">\n" ;
5622
5623         if (defined $fetch) {
5624                 if ($fetch eq $push) {
5625                         $urls_table .= format_repo_url("URL", $fetch);
5626                 } else {
5627                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5628                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5629                 }
5630         } elsif (defined $push) {
5631                 $urls_table .= format_repo_url("Push URL", $push);
5632         } else {
5633                 $urls_table .= format_repo_url("", "No remote URL");
5634         }
5635
5636         $urls_table .= "</table>\n";
5637
5638         my $dots;
5639         if (defined $limit && $limit < @$heads) {
5640                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5641         }
5642
5643         print $urls_table;
5644         git_heads_body($heads, $head, 0, $limit, $dots);
5645 }
5646
5647 # Display a list of remote names with the respective fetch and push URLs
5648 sub git_remotes_list {
5649         my ($remotedata, $limit) = @_;
5650         print "<table class=\"heads\">\n";
5651         my $alternate = 1;
5652         my @remotes = sort keys %$remotedata;
5653
5654         my $limited = $limit && $limit < @remotes;
5655
5656         $#remotes = $limit - 1 if $limited;
5657
5658         while (my $remote = shift @remotes) {
5659                 my $rdata = $remotedata->{$remote};
5660                 my $fetch = $rdata->{'fetch'};
5661                 my $push = $rdata->{'push'};
5662                 if ($alternate) {
5663                         print "<tr class=\"dark\">\n";
5664                 } else {
5665                         print "<tr class=\"light\">\n";
5666                 }
5667                 $alternate ^= 1;
5668                 print "<td>" .
5669                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5670                                -class=> "list name"},esc_html($remote)) .
5671                       "</td>";
5672                 print "<td class=\"link\">" .
5673                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5674                       " | " .
5675                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5676                       "</td>";
5677
5678                 print "</tr>\n";
5679         }
5680
5681         if ($limited) {
5682                 print "<tr>\n" .
5683                       "<td colspan=\"3\">" .
5684                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5685                       "</td>\n" . "</tr>\n";
5686         }
5687
5688         print "</table>";
5689 }
5690
5691 # Display remote heads grouped by remote, unless there are too many
5692 # remotes, in which case we only display the remote names
5693 sub git_remotes_body {
5694         my ($remotedata, $limit, $head) = @_;
5695         if ($limit and $limit < keys %$remotedata) {
5696                 git_remotes_list($remotedata, $limit);
5697         } else {
5698                 fill_remote_heads($remotedata);
5699                 while (my ($remote, $rdata) = each %$remotedata) {
5700                         git_print_section({-class=>"remote", -id=>$remote},
5701                                 ["remotes", $remote, $remote], sub {
5702                                         git_remote_block($remote, $rdata, $limit, $head);
5703                                 });
5704                 }
5705         }
5706 }
5707
5708 sub git_search_message {
5709         my %co = @_;
5710
5711         my $greptype;
5712         if ($searchtype eq 'commit') {
5713                 $greptype = "--grep=";
5714         } elsif ($searchtype eq 'author') {
5715                 $greptype = "--author=";
5716         } elsif ($searchtype eq 'committer') {
5717                 $greptype = "--committer=";
5718         }
5719         $greptype .= $searchtext;
5720         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5721                                        $greptype, '--regexp-ignore-case',
5722                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5723
5724         my $paging_nav = '';
5725         if ($page > 0) {
5726                 $paging_nav .=
5727                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5728                                 "first") .
5729                         " &sdot; " .
5730                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5731                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5732         } else {
5733                 $paging_nav .= "first &sdot; prev";
5734         }
5735         my $next_link = '';
5736         if ($#commitlist >= 100) {
5737                 $next_link =
5738                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5739                                  -accesskey => "n", -title => "Alt-n"}, "next");
5740                 $paging_nav .= " &sdot; $next_link";
5741         } else {
5742                 $paging_nav .= " &sdot; next";
5743         }
5744
5745         git_header_html();
5746
5747         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5748         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5749         if ($page == 0 && !@commitlist) {
5750                 print "<p>No match.</p>\n";
5751         } else {
5752                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5753         }
5754
5755         git_footer_html();
5756 }
5757
5758 sub git_search_changes {
5759         my %co = @_;
5760
5761         local $/ = "\n";
5762         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5763                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5764                 ($search_use_regexp ? '--pickaxe-regex' : ())
5765                         or die_error(500, "Open git-log failed");
5766
5767         git_header_html();
5768
5769         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5770         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5771
5772         print "<table class=\"pickaxe search\">\n";
5773         my $alternate = 1;
5774         undef %co;
5775         my @files;
5776         while (my $line = <$fd>) {
5777                 chomp $line;
5778                 next unless $line;
5779
5780                 my %set = parse_difftree_raw_line($line);
5781                 if (defined $set{'commit'}) {
5782                         # finish previous commit
5783                         if (%co) {
5784                                 print "</td>\n" .
5785                                       "<td class=\"link\">" .
5786                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5787                                               "commit") .
5788                                       " | " .
5789                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5790                                                              hash_base=>$co{'id'})},
5791                                               "tree") .
5792                                       "</td>\n" .
5793                                       "</tr>\n";
5794                         }
5795
5796                         if ($alternate) {
5797                                 print "<tr class=\"dark\">\n";
5798                         } else {
5799                                 print "<tr class=\"light\">\n";
5800                         }
5801                         $alternate ^= 1;
5802                         %co = parse_commit($set{'commit'});
5803                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5804                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5805                               "<td><i>$author</i></td>\n" .
5806                               "<td>" .
5807                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5808                                       -class => "list subject"},
5809                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5810                 } elsif (defined $set{'to_id'}) {
5811                         next if ($set{'to_id'} =~ m/^0{40}$/);
5812
5813                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5814                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5815                                       -class => "list"},
5816                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5817                               "<br/>\n";
5818                 }
5819         }
5820         close $fd;
5821
5822         # finish last commit (warning: repetition!)
5823         if (%co) {
5824                 print "</td>\n" .
5825                       "<td class=\"link\">" .
5826                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5827                               "commit") .
5828                       " | " .
5829                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5830                                              hash_base=>$co{'id'})},
5831                               "tree") .
5832                       "</td>\n" .
5833                       "</tr>\n";
5834         }
5835
5836         print "</table>\n";
5837
5838         git_footer_html();
5839 }
5840
5841 sub git_search_files {
5842         my %co = @_;
5843
5844         local $/ = "\n";
5845         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5846                 $search_use_regexp ? ('-E', '-i') : '-F',
5847                 $searchtext, $co{'tree'}
5848                         or die_error(500, "Open git-grep failed");
5849
5850         git_header_html();
5851
5852         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5853         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5854
5855         print "<table class=\"grep_search\">\n";
5856         my $alternate = 1;
5857         my $matches = 0;
5858         my $lastfile = '';
5859         while (my $line = <$fd>) {
5860                 chomp $line;
5861                 my ($file, $file_href, $lno, $ltext, $binary);
5862                 last if ($matches++ > 1000);
5863                 if ($line =~ /^Binary file (.+) matches$/) {
5864                         $file = $1;
5865                         $binary = 1;
5866                 } else {
5867                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5868                         $file =~ s/^$co{'tree'}://;
5869                 }
5870                 if ($file ne $lastfile) {
5871                         $lastfile and print "</td></tr>\n";
5872                         if ($alternate++) {
5873                                 print "<tr class=\"dark\">\n";
5874                         } else {
5875                                 print "<tr class=\"light\">\n";
5876                         }
5877                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5878                                           file_name=>$file);
5879                         print "<td class=\"list\">".
5880                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5881                         print "</td><td>\n";
5882                         $lastfile = $file;
5883                 }
5884                 if ($binary) {
5885                         print "<div class=\"binary\">Binary file</div>\n";
5886                 } else {
5887                         $ltext = untabify($ltext);
5888                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5889                                 $ltext = esc_html($1, -nbsp=>1);
5890                                 $ltext .= '<span class="match">';
5891                                 $ltext .= esc_html($2, -nbsp=>1);
5892                                 $ltext .= '</span>';
5893                                 $ltext .= esc_html($3, -nbsp=>1);
5894                         } else {
5895                                 $ltext = esc_html($ltext, -nbsp=>1);
5896                         }
5897                         print "<div class=\"pre\">" .
5898                                 $cgi->a({-href => $file_href.'#l'.$lno,
5899                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5900                                 ' ' .  $ltext . "</div>\n";
5901                 }
5902         }
5903         if ($lastfile) {
5904                 print "</td></tr>\n";
5905                 if ($matches > 1000) {
5906                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5907                 }
5908         } else {
5909                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5910         }
5911         close $fd;
5912
5913         print "</table>\n";
5914
5915         git_footer_html();
5916 }
5917
5918 sub git_search_grep_body {
5919         my ($commitlist, $from, $to, $extra) = @_;
5920         $from = 0 unless defined $from;
5921         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5922
5923         print "<table class=\"commit_search\">\n";
5924         my $alternate = 1;
5925         for (my $i = $from; $i <= $to; $i++) {
5926                 my %co = %{$commitlist->[$i]};
5927                 if (!%co) {
5928                         next;
5929                 }
5930                 my $commit = $co{'id'};
5931                 if ($alternate) {
5932                         print "<tr class=\"dark\">\n";
5933                 } else {
5934                         print "<tr class=\"light\">\n";
5935                 }
5936                 $alternate ^= 1;
5937                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5938                       format_author_html('td', \%co, 15, 5) .
5939                       "<td>" .
5940                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5941                                -class => "list subject"},
5942                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5943                 my $comment = $co{'comment'};
5944                 foreach my $line (@$comment) {
5945                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5946                                 my ($lead, $match, $trail) = ($1, $2, $3);
5947                                 $match = chop_str($match, 70, 5, 'center');
5948                                 my $contextlen = int((80 - length($match))/2);
5949                                 $contextlen = 30 if ($contextlen > 30);
5950                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5951                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5952
5953                                 $lead  = esc_html($lead);
5954                                 $match = esc_html($match);
5955                                 $trail = esc_html($trail);
5956
5957                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5958                         }
5959                 }
5960                 print "</td>\n" .
5961                       "<td class=\"link\">" .
5962                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5963                       " | " .
5964                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5965                       " | " .
5966                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5967                 print "</td>\n" .
5968                       "</tr>\n";
5969         }
5970         if (defined $extra) {
5971                 print "<tr>\n" .
5972                       "<td colspan=\"3\">$extra</td>\n" .
5973                       "</tr>\n";
5974         }
5975         print "</table>\n";
5976 }
5977
5978 ## ======================================================================
5979 ## ======================================================================
5980 ## actions
5981
5982 sub git_project_list {
5983         my $order = $input_params{'order'};
5984         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5985                 die_error(400, "Unknown order parameter");
5986         }
5987
5988         my @list = git_get_projects_list();
5989         if (!@list) {
5990                 die_error(404, "No projects found");
5991         }
5992
5993         git_header_html();
5994         if (defined $home_text && -f $home_text) {
5995                 print "<div class=\"index_include\">\n";
5996                 insert_file($home_text);
5997                 print "</div>\n";
5998         }
5999         print $cgi->startform(-method => "get") .
6000               "<p class=\"projsearch\">Search:\n" .
6001               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6002               "</p>" .
6003               $cgi->end_form() . "\n";
6004         git_project_list_body(\@list, $order);
6005         git_footer_html();
6006 }
6007
6008 sub git_forks {
6009         my $order = $input_params{'order'};
6010         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6011                 die_error(400, "Unknown order parameter");
6012         }
6013
6014         my $filter = $project;
6015         $filter =~ s/\.git$//;
6016         my @list = git_get_projects_list($filter);
6017         if (!@list) {
6018                 die_error(404, "No forks found");
6019         }
6020
6021         git_header_html();
6022         git_print_page_nav('','');
6023         git_print_header_div('summary', "$project forks");
6024         git_project_list_body(\@list, $order);
6025         git_footer_html();
6026 }
6027
6028 sub git_project_index {
6029         my @projects = git_get_projects_list();
6030         if (!@projects) {
6031                 die_error(404, "No projects found");
6032         }
6033
6034         print $cgi->header(
6035                 -type => 'text/plain',
6036                 -charset => 'utf-8',
6037                 -content_disposition => 'inline; filename="index.aux"');
6038
6039         foreach my $pr (@projects) {
6040                 if (!exists $pr->{'owner'}) {
6041                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6042                 }
6043
6044                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6045                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6046                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6047                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6048                 $path  =~ s/ /\+/g;
6049                 $owner =~ s/ /\+/g;
6050
6051                 print "$path $owner\n";
6052         }
6053 }
6054
6055 sub git_summary {
6056         my $descr = git_get_project_description($project) || "none";
6057         my %co = parse_commit("HEAD");
6058         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6059         my $head = $co{'id'};
6060         my $remote_heads = gitweb_check_feature('remote_heads');
6061
6062         my $owner = git_get_project_owner($project);
6063
6064         my $refs = git_get_references();
6065         # These get_*_list functions return one more to allow us to see if
6066         # there are more ...
6067         my @taglist  = git_get_tags_list(16);
6068         my @headlist = git_get_heads_list(16);
6069         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6070         my @forklist;
6071         my $check_forks = gitweb_check_feature('forks');
6072
6073         if ($check_forks) {
6074                 # find forks of a project
6075                 my $filter = $project;
6076                 $filter =~ s/\.git$//;
6077                 @forklist = git_get_projects_list($filter);
6078                 # filter out forks of forks
6079                 @forklist = filter_forks_from_projects_list(\@forklist)
6080                         if (@forklist);
6081         }
6082
6083         git_header_html();
6084         git_print_page_nav('summary','', $head);
6085
6086         print "<div class=\"title\">&nbsp;</div>\n";
6087         print "<table class=\"projects_list\">\n" .
6088               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6089               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6090         if (defined $cd{'rfc2822'}) {
6091                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6092                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6093         }
6094
6095         # use per project git URL list in $projectroot/$project/cloneurl
6096         # or make project git URL from git base URL and project name
6097         my $url_tag = "URL";
6098         my @url_list = git_get_project_url_list($project);
6099         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6100         foreach my $git_url (@url_list) {
6101                 next unless $git_url;
6102                 print format_repo_url($url_tag, $git_url);
6103                 $url_tag = "";
6104         }
6105
6106         # Tag cloud
6107         my $show_ctags = gitweb_check_feature('ctags');
6108         if ($show_ctags) {
6109                 my $ctags = git_get_project_ctags($project);
6110                 if (%$ctags) {
6111                         # without ability to add tags, don't show if there are none
6112                         my $cloud = git_populate_project_tagcloud($ctags);
6113                         print "<tr id=\"metadata_ctags\">" .
6114                               "<td>content tags</td>" .
6115                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6116                               "</tr>\n";
6117                 }
6118         }
6119
6120         print "</table>\n";
6121
6122         # If XSS prevention is on, we don't include README.html.
6123         # TODO: Allow a readme in some safe format.
6124         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6125                 print "<div class=\"title\">readme</div>\n" .
6126                       "<div class=\"readme\">\n";
6127                 insert_file("$projectroot/$project/README.html");
6128                 print "\n</div>\n"; # class="readme"
6129         }
6130
6131         # we need to request one more than 16 (0..15) to check if
6132         # those 16 are all
6133         my @commitlist = $head ? parse_commits($head, 17) : ();
6134         if (@commitlist) {
6135                 git_print_header_div('shortlog');
6136                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6137                                   $#commitlist <=  15 ? undef :
6138                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6139         }
6140
6141         if (@taglist) {
6142                 git_print_header_div('tags');
6143                 git_tags_body(\@taglist, 0, 15,
6144                               $#taglist <=  15 ? undef :
6145                               $cgi->a({-href => href(action=>"tags")}, "..."));
6146         }
6147
6148         if (@headlist) {
6149                 git_print_header_div('heads');
6150                 git_heads_body(\@headlist, $head, 0, 15,
6151                                $#headlist <= 15 ? undef :
6152                                $cgi->a({-href => href(action=>"heads")}, "..."));
6153         }
6154
6155         if (%remotedata) {
6156                 git_print_header_div('remotes');
6157                 git_remotes_body(\%remotedata, 15, $head);
6158         }
6159
6160         if (@forklist) {
6161                 git_print_header_div('forks');
6162                 git_project_list_body(\@forklist, 'age', 0, 15,
6163                                       $#forklist <= 15 ? undef :
6164                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6165                                       'no_header');
6166         }
6167
6168         git_footer_html();
6169 }
6170
6171 sub git_tag {
6172         my %tag = parse_tag($hash);
6173
6174         if (! %tag) {
6175                 die_error(404, "Unknown tag object");
6176         }
6177
6178         my $head = git_get_head_hash($project);
6179         git_header_html();
6180         git_print_page_nav('','', $head,undef,$head);
6181         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6182         print "<div class=\"title_text\">\n" .
6183               "<table class=\"object_header\">\n" .
6184               "<tr>\n" .
6185               "<td>object</td>\n" .
6186               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6187                                $tag{'object'}) . "</td>\n" .
6188               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6189                                               $tag{'type'}) . "</td>\n" .
6190               "</tr>\n";
6191         if (defined($tag{'author'})) {
6192                 git_print_authorship_rows(\%tag, 'author');
6193         }
6194         print "</table>\n\n" .
6195               "</div>\n";
6196         print "<div class=\"page_body\">";
6197         my $comment = $tag{'comment'};
6198         foreach my $line (@$comment) {
6199                 chomp $line;
6200                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6201         }
6202         print "</div>\n";
6203         git_footer_html();
6204 }
6205
6206 sub git_blame_common {
6207         my $format = shift || 'porcelain';
6208         if ($format eq 'porcelain' && $cgi->param('js')) {
6209                 $format = 'incremental';
6210                 $action = 'blame_incremental'; # for page title etc
6211         }
6212
6213         # permissions
6214         gitweb_check_feature('blame')
6215                 or die_error(403, "Blame view not allowed");
6216
6217         # error checking
6218         die_error(400, "No file name given") unless $file_name;
6219         $hash_base ||= git_get_head_hash($project);
6220         die_error(404, "Couldn't find base commit") unless $hash_base;
6221         my %co = parse_commit($hash_base)
6222                 or die_error(404, "Commit not found");
6223         my $ftype = "blob";
6224         if (!defined $hash) {
6225                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6226                         or die_error(404, "Error looking up file");
6227         } else {
6228                 $ftype = git_get_type($hash);
6229                 if ($ftype !~ "blob") {
6230                         die_error(400, "Object is not a blob");
6231                 }
6232         }
6233
6234         my $fd;
6235         if ($format eq 'incremental') {
6236                 # get file contents (as base)
6237                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6238                         or die_error(500, "Open git-cat-file failed");
6239         } elsif ($format eq 'data') {
6240                 # run git-blame --incremental
6241                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6242                         $hash_base, "--", $file_name
6243                         or die_error(500, "Open git-blame --incremental failed");
6244         } else {
6245                 # run git-blame --porcelain
6246                 open $fd, "-|", git_cmd(), "blame", '-p',
6247                         $hash_base, '--', $file_name
6248                         or die_error(500, "Open git-blame --porcelain failed");
6249         }
6250
6251         # incremental blame data returns early
6252         if ($format eq 'data') {
6253                 print $cgi->header(
6254                         -type=>"text/plain", -charset => "utf-8",
6255                         -status=> "200 OK");
6256                 local $| = 1; # output autoflush
6257                 while (my $line = <$fd>) {
6258                         print to_utf8($line);
6259                 }
6260                 close $fd
6261                         or print "ERROR $!\n";
6262
6263                 print 'END';
6264                 if (defined $t0 && gitweb_check_feature('timed')) {
6265                         print ' '.
6266                               tv_interval($t0, [ gettimeofday() ]).
6267                               ' '.$number_of_git_cmds;
6268                 }
6269                 print "\n";
6270
6271                 return;
6272         }
6273
6274         # page header
6275         git_header_html();
6276         my $formats_nav =
6277                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6278                         "blob") .
6279                 " | ";
6280         if ($format eq 'incremental') {
6281                 $formats_nav .=
6282                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6283                                 "blame") . " (non-incremental)";
6284         } else {
6285                 $formats_nav .=
6286                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6287                                 "blame") . " (incremental)";
6288         }
6289         $formats_nav .=
6290                 " | " .
6291                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6292                         "history") .
6293                 " | " .
6294                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6295                         "HEAD");
6296         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6297         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6298         git_print_page_path($file_name, $ftype, $hash_base);
6299
6300         # page body
6301         if ($format eq 'incremental') {
6302                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6303                       "This page requires JavaScript to run.\n Use ".
6304                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6305                               'this page').
6306                       " instead.\n".
6307                       "</b></center></div>\n</noscript>\n";
6308
6309                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6310         }
6311
6312         print qq!<div class="page_body">\n!;
6313         print qq!<div id="progress_info">... / ...</div>\n!
6314                 if ($format eq 'incremental');
6315         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6316               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6317               qq!<thead>\n!.
6318               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6319               qq!</thead>\n!.
6320               qq!<tbody>\n!;
6321
6322         my @rev_color = qw(light dark);
6323         my $num_colors = scalar(@rev_color);
6324         my $current_color = 0;
6325
6326         if ($format eq 'incremental') {
6327                 my $color_class = $rev_color[$current_color];
6328
6329                 #contents of a file
6330                 my $linenr = 0;
6331         LINE:
6332                 while (my $line = <$fd>) {
6333                         chomp $line;
6334                         $linenr++;
6335
6336                         print qq!<tr id="l$linenr" class="$color_class">!.
6337                               qq!<td class="sha1"><a href=""> </a></td>!.
6338                               qq!<td class="linenr">!.
6339                               qq!<a class="linenr" href="">$linenr</a></td>!;
6340                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6341                         print qq!</tr>\n!;
6342                 }
6343
6344         } else { # porcelain, i.e. ordinary blame
6345                 my %metainfo = (); # saves information about commits
6346
6347                 # blame data
6348         LINE:
6349                 while (my $line = <$fd>) {
6350                         chomp $line;
6351                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6352                         # no <lines in group> for subsequent lines in group of lines
6353                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6354                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6355                         if (!exists $metainfo{$full_rev}) {
6356                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6357                         }
6358                         my $meta = $metainfo{$full_rev};
6359                         my $data;
6360                         while ($data = <$fd>) {
6361                                 chomp $data;
6362                                 last if ($data =~ s/^\t//); # contents of line
6363                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6364                                         $meta->{$1} = $2 unless exists $meta->{$1};
6365                                 }
6366                                 if ($data =~ /^previous /) {
6367                                         $meta->{'nprevious'}++;
6368                                 }
6369                         }
6370                         my $short_rev = substr($full_rev, 0, 8);
6371                         my $author = $meta->{'author'};
6372                         my %date =
6373                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6374                         my $date = $date{'iso-tz'};
6375                         if ($group_size) {
6376                                 $current_color = ($current_color + 1) % $num_colors;
6377                         }
6378                         my $tr_class = $rev_color[$current_color];
6379                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6380                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6381                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6382                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6383                         if ($group_size) {
6384                                 print "<td class=\"sha1\"";
6385                                 print " title=\"". esc_html($author) . ", $date\"";
6386                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6387                                 print ">";
6388                                 print $cgi->a({-href => href(action=>"commit",
6389                                                              hash=>$full_rev,
6390                                                              file_name=>$file_name)},
6391                                               esc_html($short_rev));
6392                                 if ($group_size >= 2) {
6393                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6394                                         if (@author_initials) {
6395                                                 print "<br />" .
6396                                                       esc_html(join('', @author_initials));
6397                                                 #           or join('.', ...)
6398                                         }
6399                                 }
6400                                 print "</td>\n";
6401                         }
6402                         # 'previous' <sha1 of parent commit> <filename at commit>
6403                         if (exists $meta->{'previous'} &&
6404                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6405                                 $meta->{'parent'} = $1;
6406                                 $meta->{'file_parent'} = unquote($2);
6407                         }
6408                         my $linenr_commit =
6409                                 exists($meta->{'parent'}) ?
6410                                 $meta->{'parent'} : $full_rev;
6411                         my $linenr_filename =
6412                                 exists($meta->{'file_parent'}) ?
6413                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6414                         my $blamed = href(action => 'blame',
6415                                           file_name => $linenr_filename,
6416                                           hash_base => $linenr_commit);
6417                         print "<td class=\"linenr\">";
6418                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6419                                         -class => "linenr" },
6420                                       esc_html($lineno));
6421                         print "</td>";
6422                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6423                         print "</tr>\n";
6424                 } # end while
6425
6426         }
6427
6428         # footer
6429         print "</tbody>\n".
6430               "</table>\n"; # class="blame"
6431         print "</div>\n";   # class="blame_body"
6432         close $fd
6433                 or print "Reading blob failed\n";
6434
6435         git_footer_html();
6436 }
6437
6438 sub git_blame {
6439         git_blame_common();
6440 }
6441
6442 sub git_blame_incremental {
6443         git_blame_common('incremental');
6444 }
6445
6446 sub git_blame_data {
6447         git_blame_common('data');
6448 }
6449
6450 sub git_tags {
6451         my $head = git_get_head_hash($project);
6452         git_header_html();
6453         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6454         git_print_header_div('summary', $project);
6455
6456         my @tagslist = git_get_tags_list();
6457         if (@tagslist) {
6458                 git_tags_body(\@tagslist);
6459         }
6460         git_footer_html();
6461 }
6462
6463 sub git_heads {
6464         my $head = git_get_head_hash($project);
6465         git_header_html();
6466         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6467         git_print_header_div('summary', $project);
6468
6469         my @headslist = git_get_heads_list();
6470         if (@headslist) {
6471                 git_heads_body(\@headslist, $head);
6472         }
6473         git_footer_html();
6474 }
6475
6476 # used both for single remote view and for list of all the remotes
6477 sub git_remotes {
6478         gitweb_check_feature('remote_heads')
6479                 or die_error(403, "Remote heads view is disabled");
6480
6481         my $head = git_get_head_hash($project);
6482         my $remote = $input_params{'hash'};
6483
6484         my $remotedata = git_get_remotes_list($remote);
6485         die_error(500, "Unable to get remote information") unless defined $remotedata;
6486
6487         unless (%$remotedata) {
6488                 die_error(404, defined $remote ?
6489                         "Remote $remote not found" :
6490                         "No remotes found");
6491         }
6492
6493         git_header_html(undef, undef, -action_extra => $remote);
6494         git_print_page_nav('', '',  $head, undef, $head,
6495                 format_ref_views($remote ? '' : 'remotes'));
6496
6497         fill_remote_heads($remotedata);
6498         if (defined $remote) {
6499                 git_print_header_div('remotes', "$remote remote for $project");
6500                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6501         } else {
6502                 git_print_header_div('summary', "$project remotes");
6503                 git_remotes_body($remotedata, undef, $head);
6504         }
6505
6506         git_footer_html();
6507 }
6508
6509 sub git_blob_plain {
6510         my $type = shift;
6511         my $expires;
6512
6513         if (!defined $hash) {
6514                 if (defined $file_name) {
6515                         my $base = $hash_base || git_get_head_hash($project);
6516                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6517                                 or die_error(404, "Cannot find file");
6518                 } else {
6519                         die_error(400, "No file name defined");
6520                 }
6521         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6522                 # blobs defined by non-textual hash id's can be cached
6523                 $expires = "+1d";
6524         }
6525
6526         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6527                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6528
6529         # content-type (can include charset)
6530         $type = blob_contenttype($fd, $file_name, $type);
6531
6532         # "save as" filename, even when no $file_name is given
6533         my $save_as = "$hash";
6534         if (defined $file_name) {
6535                 $save_as = $file_name;
6536         } elsif ($type =~ m/^text\//) {
6537                 $save_as .= '.txt';
6538         }
6539
6540         # With XSS prevention on, blobs of all types except a few known safe
6541         # ones are served with "Content-Disposition: attachment" to make sure
6542         # they don't run in our security domain.  For certain image types,
6543         # blob view writes an <img> tag referring to blob_plain view, and we
6544         # want to be sure not to break that by serving the image as an
6545         # attachment (though Firefox 3 doesn't seem to care).
6546         my $sandbox = $prevent_xss &&
6547                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6548
6549         # serve text/* as text/plain
6550         if ($prevent_xss &&
6551             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6552              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6553                 my $rest = $1;
6554                 $rest = defined $rest ? $rest : '';
6555                 $type = "text/plain$rest";
6556         }
6557
6558         print $cgi->header(
6559                 -type => $type,
6560                 -expires => $expires,
6561                 -content_disposition =>
6562                         ($sandbox ? 'attachment' : 'inline')
6563                         . '; filename="' . $save_as . '"');
6564         local $/ = undef;
6565         binmode STDOUT, ':raw';
6566         print <$fd>;
6567         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6568         close $fd;
6569 }
6570
6571 sub git_blob {
6572         my $expires;
6573
6574         if (!defined $hash) {
6575                 if (defined $file_name) {
6576                         my $base = $hash_base || git_get_head_hash($project);
6577                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6578                                 or die_error(404, "Cannot find file");
6579                 } else {
6580                         die_error(400, "No file name defined");
6581                 }
6582         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6583                 # blobs defined by non-textual hash id's can be cached
6584                 $expires = "+1d";
6585         }
6586
6587         my $have_blame = gitweb_check_feature('blame');
6588         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6589                 or die_error(500, "Couldn't cat $file_name, $hash");
6590         my $mimetype = blob_mimetype($fd, $file_name);
6591         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6592         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6593                 close $fd;
6594                 return git_blob_plain($mimetype);
6595         }
6596         # we can have blame only for text/* mimetype
6597         $have_blame &&= ($mimetype =~ m!^text/!);
6598
6599         my $highlight = gitweb_check_feature('highlight');
6600         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6601         $fd = run_highlighter($fd, $highlight, $syntax)
6602                 if $syntax;
6603
6604         git_header_html(undef, $expires);
6605         my $formats_nav = '';
6606         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6607                 if (defined $file_name) {
6608                         if ($have_blame) {
6609                                 $formats_nav .=
6610                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6611                                                 "blame") .
6612                                         " | ";
6613                         }
6614                         $formats_nav .=
6615                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6616                                         "history") .
6617                                 " | " .
6618                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6619                                         "raw") .
6620                                 " | " .
6621                                 $cgi->a({-href => href(action=>"blob",
6622                                                        hash_base=>"HEAD", file_name=>$file_name)},
6623                                         "HEAD");
6624                 } else {
6625                         $formats_nav .=
6626                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6627                                         "raw");
6628                 }
6629                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6630                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6631         } else {
6632                 print "<div class=\"page_nav\">\n" .
6633                       "<br/><br/></div>\n" .
6634                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6635         }
6636         git_print_page_path($file_name, "blob", $hash_base);
6637         print "<div class=\"page_body\">\n";
6638         if ($mimetype =~ m!^image/!) {
6639                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6640                 if ($file_name) {
6641                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6642                 }
6643                 print qq! src="! .
6644                       href(action=>"blob_plain", hash=>$hash,
6645                            hash_base=>$hash_base, file_name=>$file_name) .
6646                       qq!" />\n!;
6647         } else {
6648                 my $nr;
6649                 while (my $line = <$fd>) {
6650                         chomp $line;
6651                         $nr++;
6652                         $line = untabify($line);
6653                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6654                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6655                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6656                 }
6657         }
6658         close $fd
6659                 or print "Reading blob failed.\n";
6660         print "</div>";
6661         git_footer_html();
6662 }
6663
6664 sub git_tree {
6665         if (!defined $hash_base) {
6666                 $hash_base = "HEAD";
6667         }
6668         if (!defined $hash) {
6669                 if (defined $file_name) {
6670                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6671                 } else {
6672                         $hash = $hash_base;
6673                 }
6674         }
6675         die_error(404, "No such tree") unless defined($hash);
6676
6677         my $show_sizes = gitweb_check_feature('show-sizes');
6678         my $have_blame = gitweb_check_feature('blame');
6679
6680         my @entries = ();
6681         {
6682                 local $/ = "\0";
6683                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6684                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6685                         or die_error(500, "Open git-ls-tree failed");
6686                 @entries = map { chomp; $_ } <$fd>;
6687                 close $fd
6688                         or die_error(404, "Reading tree failed");
6689         }
6690
6691         my $refs = git_get_references();
6692         my $ref = format_ref_marker($refs, $hash_base);
6693         git_header_html();
6694         my $basedir = '';
6695         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6696                 my @views_nav = ();
6697                 if (defined $file_name) {
6698                         push @views_nav,
6699                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6700                                         "history"),
6701                                 $cgi->a({-href => href(action=>"tree",
6702                                                        hash_base=>"HEAD", file_name=>$file_name)},
6703                                         "HEAD"),
6704                 }
6705                 my $snapshot_links = format_snapshot_links($hash);
6706                 if (defined $snapshot_links) {
6707                         # FIXME: Should be available when we have no hash base as well.
6708                         push @views_nav, $snapshot_links;
6709                 }
6710                 git_print_page_nav('tree','', $hash_base, undef, undef,
6711                                    join(' | ', @views_nav));
6712                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6713         } else {
6714                 undef $hash_base;
6715                 print "<div class=\"page_nav\">\n";
6716                 print "<br/><br/></div>\n";
6717                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6718         }
6719         if (defined $file_name) {
6720                 $basedir = $file_name;
6721                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6722                         $basedir .= '/';
6723                 }
6724                 git_print_page_path($file_name, 'tree', $hash_base);
6725         }
6726         print "<div class=\"page_body\">\n";
6727         print "<table class=\"tree\">\n";
6728         my $alternate = 1;
6729         # '..' (top directory) link if possible
6730         if (defined $hash_base &&
6731             defined $file_name && $file_name =~ m![^/]+$!) {
6732                 if ($alternate) {
6733                         print "<tr class=\"dark\">\n";
6734                 } else {
6735                         print "<tr class=\"light\">\n";
6736                 }
6737                 $alternate ^= 1;
6738
6739                 my $up = $file_name;
6740                 $up =~ s!/?[^/]+$!!;
6741                 undef $up unless $up;
6742                 # based on git_print_tree_entry
6743                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6744                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6745                 print '<td class="list">';
6746                 print $cgi->a({-href => href(action=>"tree",
6747                                              hash_base=>$hash_base,
6748                                              file_name=>$up)},
6749                               "..");
6750                 print "</td>\n";
6751                 print "<td class=\"link\"></td>\n";
6752
6753                 print "</tr>\n";
6754         }
6755         foreach my $line (@entries) {
6756                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6757
6758                 if ($alternate) {
6759                         print "<tr class=\"dark\">\n";
6760                 } else {
6761                         print "<tr class=\"light\">\n";
6762                 }
6763                 $alternate ^= 1;
6764
6765                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6766
6767                 print "</tr>\n";
6768         }
6769         print "</table>\n" .
6770               "</div>";
6771         git_footer_html();
6772 }
6773
6774 sub snapshot_name {
6775         my ($project, $hash) = @_;
6776
6777         # path/to/project.git  -> project
6778         # path/to/project/.git -> project
6779         my $name = to_utf8($project);
6780         $name =~ s,([^/])/*\.git$,$1,;
6781         $name = basename($name);
6782         # sanitize name
6783         $name =~ s/[[:cntrl:]]/?/g;
6784
6785         my $ver = $hash;
6786         if ($hash =~ /^[0-9a-fA-F]+$/) {
6787                 # shorten SHA-1 hash
6788                 my $full_hash = git_get_full_hash($project, $hash);
6789                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6790                         $ver = git_get_short_hash($project, $hash);
6791                 }
6792         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6793                 # tags don't need shortened SHA-1 hash
6794                 $ver = $1;
6795         } else {
6796                 # branches and other need shortened SHA-1 hash
6797                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6798                         $ver = $1;
6799                 }
6800                 $ver .= '-' . git_get_short_hash($project, $hash);
6801         }
6802         # in case of hierarchical branch names
6803         $ver =~ s!/!.!g;
6804
6805         # name = project-version_string
6806         $name = "$name-$ver";
6807
6808         return wantarray ? ($name, $name) : $name;
6809 }
6810
6811 sub git_snapshot {
6812         my $format = $input_params{'snapshot_format'};
6813         if (!@snapshot_fmts) {
6814                 die_error(403, "Snapshots not allowed");
6815         }
6816         # default to first supported snapshot format
6817         $format ||= $snapshot_fmts[0];
6818         if ($format !~ m/^[a-z0-9]+$/) {
6819                 die_error(400, "Invalid snapshot format parameter");
6820         } elsif (!exists($known_snapshot_formats{$format})) {
6821                 die_error(400, "Unknown snapshot format");
6822         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6823                 die_error(403, "Snapshot format not allowed");
6824         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6825                 die_error(403, "Unsupported snapshot format");
6826         }
6827
6828         my $type = git_get_type("$hash^{}");
6829         if (!$type) {
6830                 die_error(404, 'Object does not exist');
6831         }  elsif ($type eq 'blob') {
6832                 die_error(400, 'Object is not a tree-ish');
6833         }
6834
6835         my ($name, $prefix) = snapshot_name($project, $hash);
6836         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6837         my $cmd = quote_command(
6838                 git_cmd(), 'archive',
6839                 "--format=$known_snapshot_formats{$format}{'format'}",
6840                 "--prefix=$prefix/", $hash);
6841         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6842                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6843         }
6844
6845         $filename =~ s/(["\\])/\\$1/g;
6846         print $cgi->header(
6847                 -type => $known_snapshot_formats{$format}{'type'},
6848                 -content_disposition => 'inline; filename="' . $filename . '"',
6849                 -status => '200 OK');
6850
6851         open my $fd, "-|", $cmd
6852                 or die_error(500, "Execute git-archive failed");
6853         binmode STDOUT, ':raw';
6854         print <$fd>;
6855         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6856         close $fd;
6857 }
6858
6859 sub git_log_generic {
6860         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6861
6862         my $head = git_get_head_hash($project);
6863         if (!defined $base) {
6864                 $base = $head;
6865         }
6866         if (!defined $page) {
6867                 $page = 0;
6868         }
6869         my $refs = git_get_references();
6870
6871         my $commit_hash = $base;
6872         if (defined $parent) {
6873                 $commit_hash = "$parent..$base";
6874         }
6875         my @commitlist =
6876                 parse_commits($commit_hash, 101, (100 * $page),
6877                               defined $file_name ? ($file_name, "--full-history") : ());
6878
6879         my $ftype;
6880         if (!defined $file_hash && defined $file_name) {
6881                 # some commits could have deleted file in question,
6882                 # and not have it in tree, but one of them has to have it
6883                 for (my $i = 0; $i < @commitlist; $i++) {
6884                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6885                         last if defined $file_hash;
6886                 }
6887         }
6888         if (defined $file_hash) {
6889                 $ftype = git_get_type($file_hash);
6890         }
6891         if (defined $file_name && !defined $ftype) {
6892                 die_error(500, "Unknown type of object");
6893         }
6894         my %co;
6895         if (defined $file_name) {
6896                 %co = parse_commit($base)
6897                         or die_error(404, "Unknown commit object");
6898         }
6899
6900
6901         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6902         my $next_link = '';
6903         if ($#commitlist >= 100) {
6904                 $next_link =
6905                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6906                                  -accesskey => "n", -title => "Alt-n"}, "next");
6907         }
6908         my $patch_max = gitweb_get_feature('patches');
6909         if ($patch_max && !defined $file_name) {
6910                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6911                         $paging_nav .= " &sdot; " .
6912                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6913                                         "patches");
6914                 }
6915         }
6916
6917         git_header_html();
6918         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6919         if (defined $file_name) {
6920                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6921         } else {
6922                 git_print_header_div('summary', $project)
6923         }
6924         git_print_page_path($file_name, $ftype, $hash_base)
6925                 if (defined $file_name);
6926
6927         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6928                      $file_name, $file_hash, $ftype);
6929
6930         git_footer_html();
6931 }
6932
6933 sub git_log {
6934         git_log_generic('log', \&git_log_body,
6935                         $hash, $hash_parent);
6936 }
6937
6938 sub git_commit {
6939         $hash ||= $hash_base || "HEAD";
6940         my %co = parse_commit($hash)
6941             or die_error(404, "Unknown commit object");
6942
6943         my $parent  = $co{'parent'};
6944         my $parents = $co{'parents'}; # listref
6945
6946         # we need to prepare $formats_nav before any parameter munging
6947         my $formats_nav;
6948         if (!defined $parent) {
6949                 # --root commitdiff
6950                 $formats_nav .= '(initial)';
6951         } elsif (@$parents == 1) {
6952                 # single parent commit
6953                 $formats_nav .=
6954                         '(parent: ' .
6955                         $cgi->a({-href => href(action=>"commit",
6956                                                hash=>$parent)},
6957                                 esc_html(substr($parent, 0, 7))) .
6958                         ')';
6959         } else {
6960                 # merge commit
6961                 $formats_nav .=
6962                         '(merge: ' .
6963                         join(' ', map {
6964                                 $cgi->a({-href => href(action=>"commit",
6965                                                        hash=>$_)},
6966                                         esc_html(substr($_, 0, 7)));
6967                         } @$parents ) .
6968                         ')';
6969         }
6970         if (gitweb_check_feature('patches') && @$parents <= 1) {
6971                 $formats_nav .= " | " .
6972                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6973                                 "patch");
6974         }
6975
6976         if (!defined $parent) {
6977                 $parent = "--root";
6978         }
6979         my @difftree;
6980         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6981                 @diff_opts,
6982                 (@$parents <= 1 ? $parent : '-c'),
6983                 $hash, "--"
6984                 or die_error(500, "Open git-diff-tree failed");
6985         @difftree = map { chomp; $_ } <$fd>;
6986         close $fd or die_error(404, "Reading git-diff-tree failed");
6987
6988         # non-textual hash id's can be cached
6989         my $expires;
6990         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6991                 $expires = "+1d";
6992         }
6993         my $refs = git_get_references();
6994         my $ref = format_ref_marker($refs, $co{'id'});
6995
6996         git_header_html(undef, $expires);
6997         git_print_page_nav('commit', '',
6998                            $hash, $co{'tree'}, $hash,
6999                            $formats_nav);
7000
7001         if (defined $co{'parent'}) {
7002                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7003         } else {
7004                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7005         }
7006         print "<div class=\"title_text\">\n" .
7007               "<table class=\"object_header\">\n";
7008         git_print_authorship_rows(\%co);
7009         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7010         print "<tr>" .
7011               "<td>tree</td>" .
7012               "<td class=\"sha1\">" .
7013               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7014                        class => "list"}, $co{'tree'}) .
7015               "</td>" .
7016               "<td class=\"link\">" .
7017               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7018                       "tree");
7019         my $snapshot_links = format_snapshot_links($hash);
7020         if (defined $snapshot_links) {
7021                 print " | " . $snapshot_links;
7022         }
7023         print "</td>" .
7024               "</tr>\n";
7025
7026         foreach my $par (@$parents) {
7027                 print "<tr>" .
7028                       "<td>parent</td>" .
7029                       "<td class=\"sha1\">" .
7030                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7031                                class => "list"}, $par) .
7032                       "</td>" .
7033                       "<td class=\"link\">" .
7034                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7035                       " | " .
7036                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7037                       "</td>" .
7038                       "</tr>\n";
7039         }
7040         print "</table>".
7041               "</div>\n";
7042
7043         print "<div class=\"page_body\">\n";
7044         git_print_log($co{'comment'});
7045         print "</div>\n";
7046
7047         git_difftree_body(\@difftree, $hash, @$parents);
7048
7049         git_footer_html();
7050 }
7051
7052 sub git_object {
7053         # object is defined by:
7054         # - hash or hash_base alone
7055         # - hash_base and file_name
7056         my $type;
7057
7058         # - hash or hash_base alone
7059         if ($hash || ($hash_base && !defined $file_name)) {
7060                 my $object_id = $hash || $hash_base;
7061
7062                 open my $fd, "-|", quote_command(
7063                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7064                         or die_error(404, "Object does not exist");
7065                 $type = <$fd>;
7066                 chomp $type;
7067                 close $fd
7068                         or die_error(404, "Object does not exist");
7069
7070         # - hash_base and file_name
7071         } elsif ($hash_base && defined $file_name) {
7072                 $file_name =~ s,/+$,,;
7073
7074                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7075                         or die_error(404, "Base object does not exist");
7076
7077                 # here errors should not hapen
7078                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7079                         or die_error(500, "Open git-ls-tree failed");
7080                 my $line = <$fd>;
7081                 close $fd;
7082
7083                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7084                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7085                         die_error(404, "File or directory for given base does not exist");
7086                 }
7087                 $type = $2;
7088                 $hash = $3;
7089         } else {
7090                 die_error(400, "Not enough information to find object");
7091         }
7092
7093         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7094                                           hash=>$hash, hash_base=>$hash_base,
7095                                           file_name=>$file_name),
7096                              -status => '302 Found');
7097 }
7098
7099 sub git_blobdiff {
7100         my $format = shift || 'html';
7101         my $diff_style = $input_params{'diff_style'} || 'inline';
7102
7103         my $fd;
7104         my @difftree;
7105         my %diffinfo;
7106         my $expires;
7107
7108         # preparing $fd and %diffinfo for git_patchset_body
7109         # new style URI
7110         if (defined $hash_base && defined $hash_parent_base) {
7111                 if (defined $file_name) {
7112                         # read raw output
7113                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7114                                 $hash_parent_base, $hash_base,
7115                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7116                                 or die_error(500, "Open git-diff-tree failed");
7117                         @difftree = map { chomp; $_ } <$fd>;
7118                         close $fd
7119                                 or die_error(404, "Reading git-diff-tree failed");
7120                         @difftree
7121                                 or die_error(404, "Blob diff not found");
7122
7123                 } elsif (defined $hash &&
7124                          $hash =~ /[0-9a-fA-F]{40}/) {
7125                         # try to find filename from $hash
7126
7127                         # read filtered raw output
7128                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7129                                 $hash_parent_base, $hash_base, "--"
7130                                 or die_error(500, "Open git-diff-tree failed");
7131                         @difftree =
7132                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7133                                 # $hash == to_id
7134                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7135                                 map { chomp; $_ } <$fd>;
7136                         close $fd
7137                                 or die_error(404, "Reading git-diff-tree failed");
7138                         @difftree
7139                                 or die_error(404, "Blob diff not found");
7140
7141                 } else {
7142                         die_error(400, "Missing one of the blob diff parameters");
7143                 }
7144
7145                 if (@difftree > 1) {
7146                         die_error(400, "Ambiguous blob diff specification");
7147                 }
7148
7149                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7150                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7151                 $file_name   ||= $diffinfo{'to_file'};
7152
7153                 $hash_parent ||= $diffinfo{'from_id'};
7154                 $hash        ||= $diffinfo{'to_id'};
7155
7156                 # non-textual hash id's can be cached
7157                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7158                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7159                         $expires = '+1d';
7160                 }
7161
7162                 # open patch output
7163                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7164                         '-p', ($format eq 'html' ? "--full-index" : ()),
7165                         $hash_parent_base, $hash_base,
7166                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7167                         or die_error(500, "Open git-diff-tree failed");
7168         }
7169
7170         # old/legacy style URI -- not generated anymore since 1.4.3.
7171         if (!%diffinfo) {
7172                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7173         }
7174
7175         # header
7176         if ($format eq 'html') {
7177                 my $formats_nav =
7178                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7179                                 "raw");
7180                 $formats_nav .= diff_style_nav($diff_style);
7181                 git_header_html(undef, $expires);
7182                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7183                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7184                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7185                 } else {
7186                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7187                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7188                 }
7189                 if (defined $file_name) {
7190                         git_print_page_path($file_name, "blob", $hash_base);
7191                 } else {
7192                         print "<div class=\"page_path\"></div>\n";
7193                 }
7194
7195         } elsif ($format eq 'plain') {
7196                 print $cgi->header(
7197                         -type => 'text/plain',
7198                         -charset => 'utf-8',
7199                         -expires => $expires,
7200                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7201
7202                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7203
7204         } else {
7205                 die_error(400, "Unknown blobdiff format");
7206         }
7207
7208         # patch
7209         if ($format eq 'html') {
7210                 print "<div class=\"page_body\">\n";
7211
7212                 git_patchset_body($fd, $diff_style,
7213                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7214                 close $fd;
7215
7216                 print "</div>\n"; # class="page_body"
7217                 git_footer_html();
7218
7219         } else {
7220                 while (my $line = <$fd>) {
7221                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7222                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7223
7224                         print $line;
7225
7226                         last if $line =~ m!^\+\+\+!;
7227                 }
7228                 local $/ = undef;
7229                 print <$fd>;
7230                 close $fd;
7231         }
7232 }
7233
7234 sub git_blobdiff_plain {
7235         git_blobdiff('plain');
7236 }
7237
7238 # assumes that it is added as later part of already existing navigation,
7239 # so it returns "| foo | bar" rather than just "foo | bar"
7240 sub diff_style_nav {
7241         my ($diff_style, $is_combined) = @_;
7242         $diff_style ||= 'inline';
7243
7244         return "" if ($is_combined);
7245
7246         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7247         my %styles = @styles;
7248         @styles =
7249                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7250
7251         return join '',
7252                 map { " | ".$_ }
7253                 map {
7254                         $_ eq $diff_style ? $styles{$_} :
7255                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7256                 } @styles;
7257 }
7258
7259 sub git_commitdiff {
7260         my %params = @_;
7261         my $format = $params{-format} || 'html';
7262         my $diff_style = $input_params{'diff_style'} || 'inline';
7263
7264         my ($patch_max) = gitweb_get_feature('patches');
7265         if ($format eq 'patch') {
7266                 die_error(403, "Patch view not allowed") unless $patch_max;
7267         }
7268
7269         $hash ||= $hash_base || "HEAD";
7270         my %co = parse_commit($hash)
7271             or die_error(404, "Unknown commit object");
7272
7273         # choose format for commitdiff for merge
7274         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7275                 $hash_parent = '--cc';
7276         }
7277         # we need to prepare $formats_nav before almost any parameter munging
7278         my $formats_nav;
7279         if ($format eq 'html') {
7280                 $formats_nav =
7281                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7282                                 "raw");
7283                 if ($patch_max && @{$co{'parents'}} <= 1) {
7284                         $formats_nav .= " | " .
7285                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7286                                         "patch");
7287                 }
7288                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7289
7290                 if (defined $hash_parent &&
7291                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7292                         # commitdiff with two commits given
7293                         my $hash_parent_short = $hash_parent;
7294                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7295                                 $hash_parent_short = substr($hash_parent, 0, 7);
7296                         }
7297                         $formats_nav .=
7298                                 ' (from';
7299                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7300                                 if ($co{'parents'}[$i] eq $hash_parent) {
7301                                         $formats_nav .= ' parent ' . ($i+1);
7302                                         last;
7303                                 }
7304                         }
7305                         $formats_nav .= ': ' .
7306                                 $cgi->a({-href => href(-replay=>1,
7307                                                        hash=>$hash_parent, hash_base=>undef)},
7308                                         esc_html($hash_parent_short)) .
7309                                 ')';
7310                 } elsif (!$co{'parent'}) {
7311                         # --root commitdiff
7312                         $formats_nav .= ' (initial)';
7313                 } elsif (scalar @{$co{'parents'}} == 1) {
7314                         # single parent commit
7315                         $formats_nav .=
7316                                 ' (parent: ' .
7317                                 $cgi->a({-href => href(-replay=>1,
7318                                                        hash=>$co{'parent'}, hash_base=>undef)},
7319                                         esc_html(substr($co{'parent'}, 0, 7))) .
7320                                 ')';
7321                 } else {
7322                         # merge commit
7323                         if ($hash_parent eq '--cc') {
7324                                 $formats_nav .= ' | ' .
7325                                         $cgi->a({-href => href(-replay=>1,
7326                                                                hash=>$hash, hash_parent=>'-c')},
7327                                                 'combined');
7328                         } else { # $hash_parent eq '-c'
7329                                 $formats_nav .= ' | ' .
7330                                         $cgi->a({-href => href(-replay=>1,
7331                                                                hash=>$hash, hash_parent=>'--cc')},
7332                                                 'compact');
7333                         }
7334                         $formats_nav .=
7335                                 ' (merge: ' .
7336                                 join(' ', map {
7337                                         $cgi->a({-href => href(-replay=>1,
7338                                                                hash=>$_, hash_base=>undef)},
7339                                                 esc_html(substr($_, 0, 7)));
7340                                 } @{$co{'parents'}} ) .
7341                                 ')';
7342                 }
7343         }
7344
7345         my $hash_parent_param = $hash_parent;
7346         if (!defined $hash_parent_param) {
7347                 # --cc for multiple parents, --root for parentless
7348                 $hash_parent_param =
7349                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7350         }
7351
7352         # read commitdiff
7353         my $fd;
7354         my @difftree;
7355         if ($format eq 'html') {
7356                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7357                         "--no-commit-id", "--patch-with-raw", "--full-index",
7358                         $hash_parent_param, $hash, "--"
7359                         or die_error(500, "Open git-diff-tree failed");
7360
7361                 while (my $line = <$fd>) {
7362                         chomp $line;
7363                         # empty line ends raw part of diff-tree output
7364                         last unless $line;
7365                         push @difftree, scalar parse_difftree_raw_line($line);
7366                 }
7367
7368         } elsif ($format eq 'plain') {
7369                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7370                         '-p', $hash_parent_param, $hash, "--"
7371                         or die_error(500, "Open git-diff-tree failed");
7372         } elsif ($format eq 'patch') {
7373                 # For commit ranges, we limit the output to the number of
7374                 # patches specified in the 'patches' feature.
7375                 # For single commits, we limit the output to a single patch,
7376                 # diverging from the git-format-patch default.
7377                 my @commit_spec = ();
7378                 if ($hash_parent) {
7379                         if ($patch_max > 0) {
7380                                 push @commit_spec, "-$patch_max";
7381                         }
7382                         push @commit_spec, '-n', "$hash_parent..$hash";
7383                 } else {
7384                         if ($params{-single}) {
7385                                 push @commit_spec, '-1';
7386                         } else {
7387                                 if ($patch_max > 0) {
7388                                         push @commit_spec, "-$patch_max";
7389                                 }
7390                                 push @commit_spec, "-n";
7391                         }
7392                         push @commit_spec, '--root', $hash;
7393                 }
7394                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7395                         '--encoding=utf8', '--stdout', @commit_spec
7396                         or die_error(500, "Open git-format-patch failed");
7397         } else {
7398                 die_error(400, "Unknown commitdiff format");
7399         }
7400
7401         # non-textual hash id's can be cached
7402         my $expires;
7403         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7404                 $expires = "+1d";
7405         }
7406
7407         # write commit message
7408         if ($format eq 'html') {
7409                 my $refs = git_get_references();
7410                 my $ref = format_ref_marker($refs, $co{'id'});
7411
7412                 git_header_html(undef, $expires);
7413                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7414                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7415                 print "<div class=\"title_text\">\n" .
7416                       "<table class=\"object_header\">\n";
7417                 git_print_authorship_rows(\%co);
7418                 print "</table>".
7419                       "</div>\n";
7420                 print "<div class=\"page_body\">\n";
7421                 if (@{$co{'comment'}} > 1) {
7422                         print "<div class=\"log\">\n";
7423                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7424                         print "</div>\n"; # class="log"
7425                 }
7426
7427         } elsif ($format eq 'plain') {
7428                 my $refs = git_get_references("tags");
7429                 my $tagname = git_get_rev_name_tags($hash);
7430                 my $filename = basename($project) . "-$hash.patch";
7431
7432                 print $cgi->header(
7433                         -type => 'text/plain',
7434                         -charset => 'utf-8',
7435                         -expires => $expires,
7436                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7437                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7438                 print "From: " . to_utf8($co{'author'}) . "\n";
7439                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7440                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7441
7442                 print "X-Git-Tag: $tagname\n" if $tagname;
7443                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7444
7445                 foreach my $line (@{$co{'comment'}}) {
7446                         print to_utf8($line) . "\n";
7447                 }
7448                 print "---\n\n";
7449         } elsif ($format eq 'patch') {
7450                 my $filename = basename($project) . "-$hash.patch";
7451
7452                 print $cgi->header(
7453                         -type => 'text/plain',
7454                         -charset => 'utf-8',
7455                         -expires => $expires,
7456                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7457         }
7458
7459         # write patch
7460         if ($format eq 'html') {
7461                 my $use_parents = !defined $hash_parent ||
7462                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7463                 git_difftree_body(\@difftree, $hash,
7464                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7465                 print "<br/>\n";
7466
7467                 git_patchset_body($fd, $diff_style,
7468                                   \@difftree, $hash,
7469                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7470                 close $fd;
7471                 print "</div>\n"; # class="page_body"
7472                 git_footer_html();
7473
7474         } elsif ($format eq 'plain') {
7475                 local $/ = undef;
7476                 print <$fd>;
7477                 close $fd
7478                         or print "Reading git-diff-tree failed\n";
7479         } elsif ($format eq 'patch') {
7480                 local $/ = undef;
7481                 print <$fd>;
7482                 close $fd
7483                         or print "Reading git-format-patch failed\n";
7484         }
7485 }
7486
7487 sub git_commitdiff_plain {
7488         git_commitdiff(-format => 'plain');
7489 }
7490
7491 # format-patch-style patches
7492 sub git_patch {
7493         git_commitdiff(-format => 'patch', -single => 1);
7494 }
7495
7496 sub git_patches {
7497         git_commitdiff(-format => 'patch');
7498 }
7499
7500 sub git_history {
7501         git_log_generic('history', \&git_history_body,
7502                         $hash_base, $hash_parent_base,
7503                         $file_name, $hash);
7504 }
7505
7506 sub git_search {
7507         $searchtype ||= 'commit';
7508
7509         # check if appropriate features are enabled
7510         gitweb_check_feature('search')
7511                 or die_error(403, "Search is disabled");
7512         if ($searchtype eq 'pickaxe') {
7513                 # pickaxe may take all resources of your box and run for several minutes
7514                 # with every query - so decide by yourself how public you make this feature
7515                 gitweb_check_feature('pickaxe')
7516                         or die_error(403, "Pickaxe search is disabled");
7517         }
7518         if ($searchtype eq 'grep') {
7519                 # grep search might be potentially CPU-intensive, too
7520                 gitweb_check_feature('grep')
7521                         or die_error(403, "Grep search is disabled");
7522         }
7523
7524         if (!defined $searchtext) {
7525                 die_error(400, "Text field is empty");
7526         }
7527         if (!defined $hash) {
7528                 $hash = git_get_head_hash($project);
7529         }
7530         my %co = parse_commit($hash);
7531         if (!%co) {
7532                 die_error(404, "Unknown commit object");
7533         }
7534         if (!defined $page) {
7535                 $page = 0;
7536         }
7537
7538         if ($searchtype eq 'commit' ||
7539             $searchtype eq 'author' ||
7540             $searchtype eq 'committer') {
7541                 git_search_message(%co);
7542         } elsif ($searchtype eq 'pickaxe') {
7543                 git_search_changes(%co);
7544         } elsif ($searchtype eq 'grep') {
7545                 git_search_files(%co);
7546         } else {
7547                 die_error(400, "Unknown search type");
7548         }
7549 }
7550
7551 sub git_search_help {
7552         git_header_html();
7553         git_print_page_nav('','', $hash,$hash,$hash);
7554         print <<EOT;
7555 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7556 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7557 the pattern entered is recognized as the POSIX extended
7558 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7559 insensitive).</p>
7560 <dl>
7561 <dt><b>commit</b></dt>
7562 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7563 EOT
7564         my $have_grep = gitweb_check_feature('grep');
7565         if ($have_grep) {
7566                 print <<EOT;
7567 <dt><b>grep</b></dt>
7568 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7569     a different one) are searched for the given pattern. On large trees, this search can take
7570 a while and put some strain on the server, so please use it with some consideration. Note that
7571 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7572 case-sensitive.</dd>
7573 EOT
7574         }
7575         print <<EOT;
7576 <dt><b>author</b></dt>
7577 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7578 <dt><b>committer</b></dt>
7579 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7580 EOT
7581         my $have_pickaxe = gitweb_check_feature('pickaxe');
7582         if ($have_pickaxe) {
7583                 print <<EOT;
7584 <dt><b>pickaxe</b></dt>
7585 <dd>All commits that caused the string to appear or disappear from any file (changes that
7586 added, removed or "modified" the string) will be listed. This search can take a while and
7587 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7588 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7589 EOT
7590         }
7591         print "</dl>\n";
7592         git_footer_html();
7593 }
7594
7595 sub git_shortlog {
7596         git_log_generic('shortlog', \&git_shortlog_body,
7597                         $hash, $hash_parent);
7598 }
7599
7600 ## ......................................................................
7601 ## feeds (RSS, Atom; OPML)
7602
7603 sub git_feed {
7604         my $format = shift || 'atom';
7605         my $have_blame = gitweb_check_feature('blame');
7606
7607         # Atom: http://www.atomenabled.org/developers/syndication/
7608         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7609         if ($format ne 'rss' && $format ne 'atom') {
7610                 die_error(400, "Unknown web feed format");
7611         }
7612
7613         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7614         my $head = $hash || 'HEAD';
7615         my @commitlist = parse_commits($head, 150, 0, $file_name);
7616
7617         my %latest_commit;
7618         my %latest_date;
7619         my $content_type = "application/$format+xml";
7620         if (defined $cgi->http('HTTP_ACCEPT') &&
7621                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7622                 # browser (feed reader) prefers text/xml
7623                 $content_type = 'text/xml';
7624         }
7625         if (defined($commitlist[0])) {
7626                 %latest_commit = %{$commitlist[0]};
7627                 my $latest_epoch = $latest_commit{'committer_epoch'};
7628                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7629                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7630                 if (defined $if_modified) {
7631                         my $since;
7632                         if (eval { require HTTP::Date; 1; }) {
7633                                 $since = HTTP::Date::str2time($if_modified);
7634                         } elsif (eval { require Time::ParseDate; 1; }) {
7635                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7636                         }
7637                         if (defined $since && $latest_epoch <= $since) {
7638                                 print $cgi->header(
7639                                         -type => $content_type,
7640                                         -charset => 'utf-8',
7641                                         -last_modified => $latest_date{'rfc2822'},
7642                                         -status => '304 Not Modified');
7643                                 return;
7644                         }
7645                 }
7646                 print $cgi->header(
7647                         -type => $content_type,
7648                         -charset => 'utf-8',
7649                         -last_modified => $latest_date{'rfc2822'});
7650         } else {
7651                 print $cgi->header(
7652                         -type => $content_type,
7653                         -charset => 'utf-8');
7654         }
7655
7656         # Optimization: skip generating the body if client asks only
7657         # for Last-Modified date.
7658         return if ($cgi->request_method() eq 'HEAD');
7659
7660         # header variables
7661         my $title = "$site_name - $project/$action";
7662         my $feed_type = 'log';
7663         if (defined $hash) {
7664                 $title .= " - '$hash'";
7665                 $feed_type = 'branch log';
7666                 if (defined $file_name) {
7667                         $title .= " :: $file_name";
7668                         $feed_type = 'history';
7669                 }
7670         } elsif (defined $file_name) {
7671                 $title .= " - $file_name";
7672                 $feed_type = 'history';
7673         }
7674         $title .= " $feed_type";
7675         my $descr = git_get_project_description($project);
7676         if (defined $descr) {
7677                 $descr = esc_html($descr);
7678         } else {
7679                 $descr = "$project " .
7680                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7681                          " feed";
7682         }
7683         my $owner = git_get_project_owner($project);
7684         $owner = esc_html($owner);
7685
7686         #header
7687         my $alt_url;
7688         if (defined $file_name) {
7689                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7690         } elsif (defined $hash) {
7691                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7692         } else {
7693                 $alt_url = href(-full=>1, action=>"summary");
7694         }
7695         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7696         if ($format eq 'rss') {
7697                 print <<XML;
7698 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7699 <channel>
7700 XML
7701                 print "<title>$title</title>\n" .
7702                       "<link>$alt_url</link>\n" .
7703                       "<description>$descr</description>\n" .
7704                       "<language>en</language>\n" .
7705                       # project owner is responsible for 'editorial' content
7706                       "<managingEditor>$owner</managingEditor>\n";
7707                 if (defined $logo || defined $favicon) {
7708                         # prefer the logo to the favicon, since RSS
7709                         # doesn't allow both
7710                         my $img = esc_url($logo || $favicon);
7711                         print "<image>\n" .
7712                               "<url>$img</url>\n" .
7713                               "<title>$title</title>\n" .
7714                               "<link>$alt_url</link>\n" .
7715                               "</image>\n";
7716                 }
7717                 if (%latest_date) {
7718                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7719                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7720                 }
7721                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7722         } elsif ($format eq 'atom') {
7723                 print <<XML;
7724 <feed xmlns="http://www.w3.org/2005/Atom">
7725 XML
7726                 print "<title>$title</title>\n" .
7727                       "<subtitle>$descr</subtitle>\n" .
7728                       '<link rel="alternate" type="text/html" href="' .
7729                       $alt_url . '" />' . "\n" .
7730                       '<link rel="self" type="' . $content_type . '" href="' .
7731                       $cgi->self_url() . '" />' . "\n" .
7732                       "<id>" . href(-full=>1) . "</id>\n" .
7733                       # use project owner for feed author
7734                       "<author><name>$owner</name></author>\n";
7735                 if (defined $favicon) {
7736                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7737                 }
7738                 if (defined $logo) {
7739                         # not twice as wide as tall: 72 x 27 pixels
7740                         print "<logo>" . esc_url($logo) . "</logo>\n";
7741                 }
7742                 if (! %latest_date) {
7743                         # dummy date to keep the feed valid until commits trickle in:
7744                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7745                 } else {
7746                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7747                 }
7748                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7749         }
7750
7751         # contents
7752         for (my $i = 0; $i <= $#commitlist; $i++) {
7753                 my %co = %{$commitlist[$i]};
7754                 my $commit = $co{'id'};
7755                 # we read 150, we always show 30 and the ones more recent than 48 hours
7756                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7757                         last;
7758                 }
7759                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7760
7761                 # get list of changed files
7762                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7763                         $co{'parent'} || "--root",
7764                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7765                         or next;
7766                 my @difftree = map { chomp; $_ } <$fd>;
7767                 close $fd
7768                         or next;
7769
7770                 # print element (entry, item)
7771                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7772                 if ($format eq 'rss') {
7773                         print "<item>\n" .
7774                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7775                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7776                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7777                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7778                               "<link>$co_url</link>\n" .
7779                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7780                               "<content:encoded>" .
7781                               "<![CDATA[\n";
7782                 } elsif ($format eq 'atom') {
7783                         print "<entry>\n" .
7784                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7785                               "<updated>$cd{'iso-8601'}</updated>\n" .
7786                               "<author>\n" .
7787                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7788                         if ($co{'author_email'}) {
7789                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7790                         }
7791                         print "</author>\n" .
7792                               # use committer for contributor
7793                               "<contributor>\n" .
7794                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7795                         if ($co{'committer_email'}) {
7796                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7797                         }
7798                         print "</contributor>\n" .
7799                               "<published>$cd{'iso-8601'}</published>\n" .
7800                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7801                               "<id>$co_url</id>\n" .
7802                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7803                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7804                 }
7805                 my $comment = $co{'comment'};
7806                 print "<pre>\n";
7807                 foreach my $line (@$comment) {
7808                         $line = esc_html($line);
7809                         print "$line\n";
7810                 }
7811                 print "</pre><ul>\n";
7812                 foreach my $difftree_line (@difftree) {
7813                         my %difftree = parse_difftree_raw_line($difftree_line);
7814                         next if !$difftree{'from_id'};
7815
7816                         my $file = $difftree{'file'} || $difftree{'to_file'};
7817
7818                         print "<li>" .
7819                               "[" .
7820                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7821                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7822                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7823                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7824                                       -title => "diff"}, 'D');
7825                         if ($have_blame) {
7826                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7827                                                              file_name=>$file, hash_base=>$commit),
7828                                               -title => "blame"}, 'B');
7829                         }
7830                         # if this is not a feed of a file history
7831                         if (!defined $file_name || $file_name ne $file) {
7832                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7833                                                              file_name=>$file, hash=>$commit),
7834                                               -title => "history"}, 'H');
7835                         }
7836                         $file = esc_path($file);
7837                         print "] ".
7838                               "$file</li>\n";
7839                 }
7840                 if ($format eq 'rss') {
7841                         print "</ul>]]>\n" .
7842                               "</content:encoded>\n" .
7843                               "</item>\n";
7844                 } elsif ($format eq 'atom') {
7845                         print "</ul>\n</div>\n" .
7846                               "</content>\n" .
7847                               "</entry>\n";
7848                 }
7849         }
7850
7851         # end of feed
7852         if ($format eq 'rss') {
7853                 print "</channel>\n</rss>\n";
7854         } elsif ($format eq 'atom') {
7855                 print "</feed>\n";
7856         }
7857 }
7858
7859 sub git_rss {
7860         git_feed('rss');
7861 }
7862
7863 sub git_atom {
7864         git_feed('atom');
7865 }
7866
7867 sub git_opml {
7868         my @list = git_get_projects_list();
7869         if (!@list) {
7870                 die_error(404, "No projects found");
7871         }
7872
7873         print $cgi->header(
7874                 -type => 'text/xml',
7875                 -charset => 'utf-8',
7876                 -content_disposition => 'inline; filename="opml.xml"');
7877
7878         my $title = esc_html($site_name);
7879         print <<XML;
7880 <?xml version="1.0" encoding="utf-8"?>
7881 <opml version="1.0">
7882 <head>
7883   <title>$title OPML Export</title>
7884 </head>
7885 <body>
7886 <outline text="git RSS feeds">
7887 XML
7888
7889         foreach my $pr (@list) {
7890                 my %proj = %$pr;
7891                 my $head = git_get_head_hash($proj{'path'});
7892                 if (!defined $head) {
7893                         next;
7894                 }
7895                 $git_dir = "$projectroot/$proj{'path'}";
7896                 my %co = parse_commit($head);
7897                 if (!%co) {
7898                         next;
7899                 }
7900
7901                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7902                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7903                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7904                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7905         }
7906         print <<XML;
7907 </outline>
7908 </body>
7909 </opml>
7910 XML
7911 }