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 $path_info = decode_utf8($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         project_filter => "pf",
 765         # this must be last entry (for manipulation from JavaScript)
 766         javascript => "js"
 767 );
 768 our %cgi_param_mapping = @cgi_param_mapping;
 769
 770 # we will also need to know the possible actions, for validation
 771 our %actions = (
 772         "blame" => \&git_blame,
 773         "blame_incremental" => \&git_blame_incremental,
 774         "blame_data" => \&git_blame_data,
 775         "blobdiff" => \&git_blobdiff,
 776         "blobdiff_plain" => \&git_blobdiff_plain,
 777         "blob" => \&git_blob,
 778         "blob_plain" => \&git_blob_plain,
 779         "commitdiff" => \&git_commitdiff,
 780         "commitdiff_plain" => \&git_commitdiff_plain,
 781         "commit" => \&git_commit,
 782         "forks" => \&git_forks,
 783         "heads" => \&git_heads,
 784         "history" => \&git_history,
 785         "log" => \&git_log,
 786         "patch" => \&git_patch,
 787         "patches" => \&git_patches,
 788         "remotes" => \&git_remotes,
 789         "rss" => \&git_rss,
 790         "atom" => \&git_atom,
 791         "search" => \&git_search,
 792         "search_help" => \&git_search_help,
 793         "shortlog" => \&git_shortlog,
 794         "summary" => \&git_summary,
 795         "tag" => \&git_tag,
 796         "tags" => \&git_tags,
 797         "tree" => \&git_tree,
 798         "snapshot" => \&git_snapshot,
 799         "object" => \&git_object,
 800         # those below don't need $project
 801         "opml" => \&git_opml,
 802         "project_list" => \&git_project_list,
 803         "project_index" => \&git_project_index,
 804 );
 805
 806 # finally, we have the hash of allowed extra_options for the commands that
 807 # allow them
 808 our %allowed_options = (
 809         "--no-merges" => [ qw(rss atom log shortlog history) ],
 810 );
 811
 812 # fill %input_params with the CGI parameters. All values except for 'opt'
 813 # should be single values, but opt can be an array. We should probably
 814 # build an array of parameters that can be multi-valued, but since for the time
 815 # being it's only this one, we just single it out
 816 sub evaluate_query_params {
 817         our $cgi;
 818
 819         while (my ($name, $symbol) = each %cgi_param_mapping) {
 820                 if ($symbol eq 'opt') {
 821                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 824                 }
 825         }
 826 }
 827
 828 # now read PATH_INFO and update the parameter list for missing parameters
 829 sub evaluate_path_info {
 830         return if defined $input_params{'project'};
 831         return if !$path_info;
 832         $path_info =~ s,^/+,,;
 833         return if !$path_info;
 834
 835         # find which part of PATH_INFO is project
 836         my $project = $path_info;
 837         $project =~ s,/+$,,;
 838         while ($project && !check_head_link("$projectroot/$project")) {
 839                 $project =~ s,/*[^/]*$,,;
 840         }
 841         return unless $project;
 842         $input_params{'project'} = $project;
 843
 844         # do not change any parameters if an action is given using the query string
 845         return if $input_params{'action'};
 846         $path_info =~ s,^\Q$project\E/*,,;
 847
 848         # next, check if we have an action
 849         my $action = $path_info;
 850         $action =~ s,/.*$,,;
 851         if (exists $actions{$action}) {
 852                 $path_info =~ s,^$action/*,,;
 853                 $input_params{'action'} = $action;
 854         }
 855
 856         # list of actions that want hash_base instead of hash, but can have no
 857         # pathname (f) parameter
 858         my @wants_base = (
 859                 'tree',
 860                 'history',
 861         );
 862
 863         # we want to catch, among others
 864         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 865         my ($parentrefname, $parentpathname, $refname, $pathname) =
 866                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 867
 868         # first, analyze the 'current' part
 869         if (defined $pathname) {
 870                 # we got "branch:filename" or "branch:dir/"
 871                 # we could use git_get_type(branch:pathname), but:
 872                 # - it needs $git_dir
 873                 # - it does a git() call
 874                 # - the convention of terminating directories with a slash
 875                 #   makes it superfluous
 876                 # - embedding the action in the PATH_INFO would make it even
 877                 #   more superfluous
 878                 $pathname =~ s,^/+,,;
 879                 if (!$pathname || substr($pathname, -1) eq "/") {
 880                         $input_params{'action'} ||= "tree";
 881                         $pathname =~ s,/$,,;
 882                 } else {
 883                         # the default action depends on whether we had parent info
 884                         # or not
 885                         if ($parentrefname) {
 886                                 $input_params{'action'} ||= "blobdiff_plain";
 887                         } else {
 888                                 $input_params{'action'} ||= "blob_plain";
 889                         }
 890                 }
 891                 $input_params{'hash_base'} ||= $refname;
 892                 $input_params{'file_name'} ||= $pathname;
 893         } elsif (defined $refname) {
 894                 # we got "branch". In this case we have to choose if we have to
 895                 # set hash or hash_base.
 896                 #
 897                 # Most of the actions without a pathname only want hash to be
 898                 # set, except for the ones specified in @wants_base that want
 899                 # hash_base instead. It should also be noted that hand-crafted
 900                 # links having 'history' as an action and no pathname or hash
 901                 # set will fail, but that happens regardless of PATH_INFO.
 902                 if (defined $parentrefname) {
 903                         # if there is parent let the default be 'shortlog' action
 904                         # (for http://git.example.com/repo.git/A..B links); if there
 905                         # is no parent, dispatch will detect type of object and set
 906                         # action appropriately if required (if action is not set)
 907                         $input_params{'action'} ||= "shortlog";
 908                 }
 909                 if ($input_params{'action'} &&
 910                     grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_base'} ||= $refname;
 912                 } else {
 913                         $input_params{'hash'} ||= $refname;
 914                 }
 915         }
 916
 917         # next, handle the 'parent' part, if present
 918         if (defined $parentrefname) {
 919                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 920                 # someproject/blobdiff/oldrev..newrev:/filename
 921                 if ($parentpathname) {
 922                         $parentpathname =~ s,^/+,,;
 923                         $parentpathname =~ s,/$,,;
 924                         $input_params{'file_parent'} ||= $parentpathname;
 925                 } else {
 926                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 927                 }
 928                 # we assume that hash_parent_base is wanted if a path was specified,
 929                 # or if the action wants hash_base instead of hash
 930                 if (defined $input_params{'file_parent'} ||
 931                         grep { $_ eq $input_params{'action'} } @wants_base) {
 932                         $input_params{'hash_parent_base'} ||= $parentrefname;
 933                 } else {
 934                         $input_params{'hash_parent'} ||= $parentrefname;
 935                 }
 936         }
 937
 938         # for the snapshot action, we allow URLs in the form
 939         # $project/snapshot/$hash.ext
 940         # where .ext determines the snapshot and gets removed from the
 941         # passed $refname to provide the $hash.
 942         #
 943         # To be able to tell that $refname includes the format extension, we
 944         # require the following two conditions to be satisfied:
 945         # - the hash input parameter MUST have been set from the $refname part
 946         #   of the URL (i.e. they must be equal)
 947         # - the snapshot format MUST NOT have been defined already (e.g. from
 948         #   CGI parameter sf)
 949         # It's also useless to try any matching unless $refname has a dot,
 950         # so we check for that too
 951         if (defined $input_params{'action'} &&
 952                 $input_params{'action'} eq 'snapshot' &&
 953                 defined $refname && index($refname, '.') != -1 &&
 954                 $refname eq $input_params{'hash'} &&
 955                 !defined $input_params{'snapshot_format'}) {
 956                 # We loop over the known snapshot formats, checking for
 957                 # extensions. Allowed extensions are both the defined suffix
 958                 # (which includes the initial dot already) and the snapshot
 959                 # format key itself, with a prepended dot
 960                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 961                         my $hash = $refname;
 962                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 963                                 next;
 964                         }
 965                         my $sfx = $1;
 966                         # a valid suffix was found, so set the snapshot format
 967                         # and reset the hash parameter
 968                         $input_params{'snapshot_format'} = $fmt;
 969                         $input_params{'hash'} = $hash;
 970                         # we also set the format suffix to the one requested
 971                         # in the URL: this way a request for e.g. .tgz returns
 972                         # a .tgz instead of a .tar.gz
 973                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 974                         last;
 975                 }
 976         }
 977 }
 978
 979 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 980      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 981      $searchtext, $search_regexp, $project_filter);
 982 sub evaluate_and_validate_params {
 983         our $action = $input_params{'action'};
 984         if (defined $action) {
 985                 if (!validate_action($action)) {
 986                         die_error(400, "Invalid action parameter");
 987                 }
 988         }
 989
 990         # parameters which are pathnames
 991         our $project = $input_params{'project'};
 992         if (defined $project) {
 993                 if (!validate_project($project)) {
 994                         undef $project;
 995                         die_error(404, "No such project");
 996                 }
 997         }
 998
 999         our $project_filter = $input_params{'project_filter'};
1000         if (defined $project_filter) {
1001                 if (!validate_pathname($project_filter)) {
1002                         die_error(404, "Invalid project_filter parameter");
1003                 }
1004         }
1005
1006         our $file_name = $input_params{'file_name'};
1007         if (defined $file_name) {
1008                 if (!validate_pathname($file_name)) {
1009                         die_error(400, "Invalid file parameter");
1010                 }
1011         }
1012
1013         our $file_parent = $input_params{'file_parent'};
1014         if (defined $file_parent) {
1015                 if (!validate_pathname($file_parent)) {
1016                         die_error(400, "Invalid file parent parameter");
1017                 }
1018         }
1019
1020         # parameters which are refnames
1021         our $hash = $input_params{'hash'};
1022         if (defined $hash) {
1023                 if (!validate_refname($hash)) {
1024                         die_error(400, "Invalid hash parameter");
1025                 }
1026         }
1027
1028         our $hash_parent = $input_params{'hash_parent'};
1029         if (defined $hash_parent) {
1030                 if (!validate_refname($hash_parent)) {
1031                         die_error(400, "Invalid hash parent parameter");
1032                 }
1033         }
1034
1035         our $hash_base = $input_params{'hash_base'};
1036         if (defined $hash_base) {
1037                 if (!validate_refname($hash_base)) {
1038                         die_error(400, "Invalid hash base parameter");
1039                 }
1040         }
1041
1042         our @extra_options = @{$input_params{'extra_options'}};
1043         # @extra_options is always defined, since it can only be (currently) set from
1044         # CGI, and $cgi->param() returns the empty array in array context if the param
1045         # is not set
1046         foreach my $opt (@extra_options) {
1047                 if (not exists $allowed_options{$opt}) {
1048                         die_error(400, "Invalid option parameter");
1049                 }
1050                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1051                         die_error(400, "Invalid option parameter for this action");
1052                 }
1053         }
1054
1055         our $hash_parent_base = $input_params{'hash_parent_base'};
1056         if (defined $hash_parent_base) {
1057                 if (!validate_refname($hash_parent_base)) {
1058                         die_error(400, "Invalid hash parent base parameter");
1059                 }
1060         }
1061
1062         # other parameters
1063         our $page = $input_params{'page'};
1064         if (defined $page) {
1065                 if ($page =~ m/[^0-9]/) {
1066                         die_error(400, "Invalid page parameter");
1067                 }
1068         }
1069
1070         our $searchtype = $input_params{'searchtype'};
1071         if (defined $searchtype) {
1072                 if ($searchtype =~ m/[^a-z]/) {
1073                         die_error(400, "Invalid searchtype parameter");
1074                 }
1075         }
1076
1077         our $search_use_regexp = $input_params{'search_use_regexp'};
1078
1079         our $searchtext = $input_params{'searchtext'};
1080         our $search_regexp;
1081         if (defined $searchtext) {
1082                 if (length($searchtext) < 2) {
1083                         die_error(403, "At least two characters are required for search parameter");
1084                 }
1085                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1086         }
1087 }
1088
1089 # path to the current git repository
1090 our $git_dir;
1091 sub evaluate_git_dir {
1092         our $git_dir = "$projectroot/$project" if $project;
1093 }
1094
1095 our (@snapshot_fmts, $git_avatar);
1096 sub configure_gitweb_features {
1097         # list of supported snapshot formats
1098         our @snapshot_fmts = gitweb_get_feature('snapshot');
1099         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1100
1101         # check that the avatar feature is set to a known provider name,
1102         # and for each provider check if the dependencies are satisfied.
1103         # if the provider name is invalid or the dependencies are not met,
1104         # reset $git_avatar to the empty string.
1105         our ($git_avatar) = gitweb_get_feature('avatar');
1106         if ($git_avatar eq 'gravatar') {
1107                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1108         } elsif ($git_avatar eq 'picon') {
1109                 # no dependencies
1110         } else {
1111                 $git_avatar = '';
1112         }
1113 }
1114
1115 # custom error handler: 'die <message>' is Internal Server Error
1116 sub handle_errors_html {
1117         my $msg = shift; # it is already HTML escaped
1118
1119         # to avoid infinite loop where error occurs in die_error,
1120         # change handler to default handler, disabling handle_errors_html
1121         set_message("Error occured when inside die_error:\n$msg");
1122
1123         # you cannot jump out of die_error when called as error handler;
1124         # the subroutine set via CGI::Carp::set_message is called _after_
1125         # HTTP headers are already written, so it cannot write them itself
1126         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1127 }
1128 set_message(\&handle_errors_html);
1129
1130 # dispatch
1131 sub dispatch {
1132         if (!defined $action) {
1133                 if (defined $hash) {
1134                         $action = git_get_type($hash);
1135                         $action or die_error(404, "Object does not exist");
1136                 } elsif (defined $hash_base && defined $file_name) {
1137                         $action = git_get_type("$hash_base:$file_name");
1138                         $action or die_error(404, "File or directory does not exist");
1139                 } elsif (defined $project) {
1140                         $action = 'summary';
1141                 } else {
1142                         $action = 'project_list';
1143                 }
1144         }
1145         if (!defined($actions{$action})) {
1146                 die_error(400, "Unknown action");
1147         }
1148         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1149             !$project) {
1150                 die_error(400, "Project needed");
1151         }
1152         $actions{$action}->();
1153 }
1154
1155 sub reset_timer {
1156         our $t0 = [ gettimeofday() ]
1157                 if defined $t0;
1158         our $number_of_git_cmds = 0;
1159 }
1160
1161 our $first_request = 1;
1162 sub run_request {
1163         reset_timer();
1164
1165         evaluate_uri();
1166         if ($first_request) {
1167                 evaluate_gitweb_config();
1168                 evaluate_git_version();
1169         }
1170         if ($per_request_config) {
1171                 if (ref($per_request_config) eq 'CODE') {
1172                         $per_request_config->();
1173                 } elsif (!$first_request) {
1174                         evaluate_gitweb_config();
1175                 }
1176         }
1177         check_loadavg();
1178
1179         # $projectroot and $projects_list might be set in gitweb config file
1180         $projects_list ||= $projectroot;
1181
1182         evaluate_query_params();
1183         evaluate_path_info();
1184         evaluate_and_validate_params();
1185         evaluate_git_dir();
1186
1187         configure_gitweb_features();
1188
1189         dispatch();
1190 }
1191
1192 our $is_last_request = sub { 1 };
1193 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1194 our $CGI = 'CGI';
1195 our $cgi;
1196 sub configure_as_fcgi {
1197         require CGI::Fast;
1198         our $CGI = 'CGI::Fast';
1199
1200         my $request_number = 0;
1201         # let each child service 100 requests
1202         our $is_last_request = sub { ++$request_number > 100 };
1203 }
1204 sub evaluate_argv {
1205         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1206         configure_as_fcgi()
1207                 if $script_name =~ /\.fcgi$/;
1208
1209         return unless (@ARGV);
1210
1211         require Getopt::Long;
1212         Getopt::Long::GetOptions(
1213                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1214                 'nproc|n=i' => sub {
1215                         my ($arg, $val) = @_;
1216                         return unless eval { require FCGI::ProcManager; 1; };
1217                         my $proc_manager = FCGI::ProcManager->new({
1218                                 n_processes => $val,
1219                         });
1220                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1221                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1222                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1223                 },
1224         );
1225 }
1226
1227 sub run {
1228         evaluate_argv();
1229
1230         $first_request = 1;
1231         $pre_listen_hook->()
1232                 if $pre_listen_hook;
1233
1234  REQUEST:
1235         while ($cgi = $CGI->new()) {
1236                 $pre_dispatch_hook->()
1237                         if $pre_dispatch_hook;
1238
1239                 run_request();
1240
1241                 $post_dispatch_hook->()
1242                         if $post_dispatch_hook;
1243                 $first_request = 0;
1244
1245                 last REQUEST if ($is_last_request->());
1246         }
1247
1248  DONE_GITWEB:
1249         1;
1250 }
1251
1252 run();
1253
1254 if (defined caller) {
1255         # wrapped in a subroutine processing requests,
1256         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1257         return;
1258 } else {
1259         # pure CGI script, serving single request
1260         exit;
1261 }
1262
1263 ## ======================================================================
1264 ## action links
1265
1266 # possible values of extra options
1267 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1268 # -replay => 1      - start from a current view (replay with modifications)
1269 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1270 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1271 sub href {
1272         my %params = @_;
1273         # default is to use -absolute url() i.e. $my_uri
1274         my $href = $params{-full} ? $my_url : $my_uri;
1275
1276         # implicit -replay, must be first of implicit params
1277         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1278
1279         $params{'project'} = $project unless exists $params{'project'};
1280
1281         if ($params{-replay}) {
1282                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1283                         if (!exists $params{$name}) {
1284                                 $params{$name} = $input_params{$name};
1285                         }
1286                 }
1287         }
1288
1289         my $use_pathinfo = gitweb_check_feature('pathinfo');
1290         if (defined $params{'project'} &&
1291             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1292                 # try to put as many parameters as possible in PATH_INFO:
1293                 #   - project name
1294                 #   - action
1295                 #   - hash_parent or hash_parent_base:/file_parent
1296                 #   - hash or hash_base:/filename
1297                 #   - the snapshot_format as an appropriate suffix
1298
1299                 # When the script is the root DirectoryIndex for the domain,
1300                 # $href here would be something like http://gitweb.example.com/
1301                 # Thus, we strip any trailing / from $href, to spare us double
1302                 # slashes in the final URL
1303                 $href =~ s,/$,,;
1304
1305                 # Then add the project name, if present
1306                 $href .= "/".esc_path_info($params{'project'});
1307                 delete $params{'project'};
1308
1309                 # since we destructively absorb parameters, we keep this
1310                 # boolean that remembers if we're handling a snapshot
1311                 my $is_snapshot = $params{'action'} eq 'snapshot';
1312
1313                 # Summary just uses the project path URL, any other action is
1314                 # added to the URL
1315                 if (defined $params{'action'}) {
1316                         $href .= "/".esc_path_info($params{'action'})
1317                                 unless $params{'action'} eq 'summary';
1318                         delete $params{'action'};
1319                 }
1320
1321                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1322                 # stripping nonexistent or useless pieces
1323                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1324                         || $params{'hash_parent'} || $params{'hash'});
1325                 if (defined $params{'hash_base'}) {
1326                         if (defined $params{'hash_parent_base'}) {
1327                                 $href .= esc_path_info($params{'hash_parent_base'});
1328                                 # skip the file_parent if it's the same as the file_name
1329                                 if (defined $params{'file_parent'}) {
1330                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1331                                                 delete $params{'file_parent'};
1332                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1333                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1334                                                 delete $params{'file_parent'};
1335                                         }
1336                                 }
1337                                 $href .= "..";
1338                                 delete $params{'hash_parent'};
1339                                 delete $params{'hash_parent_base'};
1340                         } elsif (defined $params{'hash_parent'}) {
1341                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1342                                 delete $params{'hash_parent'};
1343                         }
1344
1345                         $href .= esc_path_info($params{'hash_base'});
1346                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1347                                 $href .= ":/".esc_path_info($params{'file_name'});
1348                                 delete $params{'file_name'};
1349                         }
1350                         delete $params{'hash'};
1351                         delete $params{'hash_base'};
1352                 } elsif (defined $params{'hash'}) {
1353                         $href .= esc_path_info($params{'hash'});
1354                         delete $params{'hash'};
1355                 }
1356
1357                 # If the action was a snapshot, we can absorb the
1358                 # snapshot_format parameter too
1359                 if ($is_snapshot) {
1360                         my $fmt = $params{'snapshot_format'};
1361                         # snapshot_format should always be defined when href()
1362                         # is called, but just in case some code forgets, we
1363                         # fall back to the default
1364                         $fmt ||= $snapshot_fmts[0];
1365                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1366                         delete $params{'snapshot_format'};
1367                 }
1368         }
1369
1370         # now encode the parameters explicitly
1371         my @result = ();
1372         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1373                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1374                 if (defined $params{$name}) {
1375                         if (ref($params{$name}) eq "ARRAY") {
1376                                 foreach my $par (@{$params{$name}}) {
1377                                         push @result, $symbol . "=" . esc_param($par);
1378                                 }
1379                         } else {
1380                                 push @result, $symbol . "=" . esc_param($params{$name});
1381                         }
1382                 }
1383         }
1384         $href .= "?" . join(';', @result) if scalar @result;
1385
1386         # final transformation: trailing spaces must be escaped (URI-encoded)
1387         $href =~ s/(\s+)$/CGI::escape($1)/e;
1388
1389         if ($params{-anchor}) {
1390                 $href .= "#".esc_param($params{-anchor});
1391         }
1392
1393         return $href;
1394 }
1395
1396
1397 ## ======================================================================
1398 ## validation, quoting/unquoting and escaping
1399
1400 sub validate_action {
1401         my $input = shift || return undef;
1402         return undef unless exists $actions{$input};
1403         return $input;
1404 }
1405
1406 sub validate_project {
1407         my $input = shift || return undef;
1408         if (!validate_pathname($input) ||
1409                 !(-d "$projectroot/$input") ||
1410                 !check_export_ok("$projectroot/$input") ||
1411                 ($strict_export && !project_in_list($input))) {
1412                 return undef;
1413         } else {
1414                 return $input;
1415         }
1416 }
1417
1418 sub validate_pathname {
1419         my $input = shift || return undef;
1420
1421         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1422         # at the beginning, at the end, and between slashes.
1423         # also this catches doubled slashes
1424         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1425                 return undef;
1426         }
1427         # no null characters
1428         if ($input =~ m!\0!) {
1429                 return undef;
1430         }
1431         return $input;
1432 }
1433
1434 sub validate_refname {
1435         my $input = shift || return undef;
1436
1437         # textual hashes are O.K.
1438         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1439                 return $input;
1440         }
1441         # it must be correct pathname
1442         $input = validate_pathname($input)
1443                 or return undef;
1444         # restrictions on ref name according to git-check-ref-format
1445         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1446                 return undef;
1447         }
1448         return $input;
1449 }
1450
1451 # decode sequences of octets in utf8 into Perl's internal form,
1452 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1453 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1454 sub to_utf8 {
1455         my $str = shift;
1456         return undef unless defined $str;
1457
1458         if (utf8::is_utf8($str) || utf8::decode($str)) {
1459                 return $str;
1460         } else {
1461                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1462         }
1463 }
1464
1465 # quote unsafe chars, but keep the slash, even when it's not
1466 # correct, but quoted slashes look too horrible in bookmarks
1467 sub esc_param {
1468         my $str = shift;
1469         return undef unless defined $str;
1470         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1471         $str =~ s/ /\+/g;
1472         return $str;
1473 }
1474
1475 # the quoting rules for path_info fragment are slightly different
1476 sub esc_path_info {
1477         my $str = shift;
1478         return undef unless defined $str;
1479
1480         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1481         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1482
1483         return $str;
1484 }
1485
1486 # quote unsafe chars in whole URL, so some characters cannot be quoted
1487 sub esc_url {
1488         my $str = shift;
1489         return undef unless defined $str;
1490         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1491         $str =~ s/ /\+/g;
1492         return $str;
1493 }
1494
1495 # quote unsafe characters in HTML attributes
1496 sub esc_attr {
1497
1498         # for XHTML conformance escaping '"' to '&quot;' is not enough
1499         return esc_html(@_);
1500 }
1501
1502 # replace invalid utf8 character with SUBSTITUTION sequence
1503 sub esc_html {
1504         my $str = shift;
1505         my %opts = @_;
1506
1507         return undef unless defined $str;
1508
1509         $str = to_utf8($str);
1510         $str = $cgi->escapeHTML($str);
1511         if ($opts{'-nbsp'}) {
1512                 $str =~ s/ /&nbsp;/g;
1513         }
1514         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1515         return $str;
1516 }
1517
1518 # quote control characters and escape filename to HTML
1519 sub esc_path {
1520         my $str = shift;
1521         my %opts = @_;
1522
1523         return undef unless defined $str;
1524
1525         $str = to_utf8($str);
1526         $str = $cgi->escapeHTML($str);
1527         if ($opts{'-nbsp'}) {
1528                 $str =~ s/ /&nbsp;/g;
1529         }
1530         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1531         return $str;
1532 }
1533
1534 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1535 sub sanitize {
1536         my $str = shift;
1537
1538         return undef unless defined $str;
1539
1540         $str = to_utf8($str);
1541         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1542         return $str;
1543 }
1544
1545 # Make control characters "printable", using character escape codes (CEC)
1546 sub quot_cec {
1547         my $cntrl = shift;
1548         my %opts = @_;
1549         my %es = ( # character escape codes, aka escape sequences
1550                 "\t" => '\t',   # tab            (HT)
1551                 "\n" => '\n',   # line feed      (LF)
1552                 "\r" => '\r',   # carrige return (CR)
1553                 "\f" => '\f',   # form feed      (FF)
1554                 "\b" => '\b',   # backspace      (BS)
1555                 "\a" => '\a',   # alarm (bell)   (BEL)
1556                 "\e" => '\e',   # escape         (ESC)
1557                 "\013" => '\v', # vertical tab   (VT)
1558                 "\000" => '\0', # nul character  (NUL)
1559         );
1560         my $chr = ( (exists $es{$cntrl})
1561                     ? $es{$cntrl}
1562                     : sprintf('\%2x', ord($cntrl)) );
1563         if ($opts{-nohtml}) {
1564                 return $chr;
1565         } else {
1566                 return "<span class=\"cntrl\">$chr</span>";
1567         }
1568 }
1569
1570 # Alternatively use unicode control pictures codepoints,
1571 # Unicode "printable representation" (PR)
1572 sub quot_upr {
1573         my $cntrl = shift;
1574         my %opts = @_;
1575
1576         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1577         if ($opts{-nohtml}) {
1578                 return $chr;
1579         } else {
1580                 return "<span class=\"cntrl\">$chr</span>";
1581         }
1582 }
1583
1584 # git may return quoted and escaped filenames
1585 sub unquote {
1586         my $str = shift;
1587
1588         sub unq {
1589                 my $seq = shift;
1590                 my %es = ( # character escape codes, aka escape sequences
1591                         't' => "\t",   # tab            (HT, TAB)
1592                         'n' => "\n",   # newline        (NL)
1593                         'r' => "\r",   # return         (CR)
1594                         'f' => "\f",   # form feed      (FF)
1595                         'b' => "\b",   # backspace      (BS)
1596                         'a' => "\a",   # alarm (bell)   (BEL)
1597                         'e' => "\e",   # escape         (ESC)
1598                         'v' => "\013", # vertical tab   (VT)
1599                 );
1600
1601                 if ($seq =~ m/^[0-7]{1,3}$/) {
1602                         # octal char sequence
1603                         return chr(oct($seq));
1604                 } elsif (exists $es{$seq}) {
1605                         # C escape sequence, aka character escape code
1606                         return $es{$seq};
1607                 }
1608                 # quoted ordinary character
1609                 return $seq;
1610         }
1611
1612         if ($str =~ m/^"(.*)"$/) {
1613                 # needs unquoting
1614                 $str = $1;
1615                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1616         }
1617         return $str;
1618 }
1619
1620 # escape tabs (convert tabs to spaces)
1621 sub untabify {
1622         my $line = shift;
1623
1624         while ((my $pos = index($line, "\t")) != -1) {
1625                 if (my $count = (8 - ($pos % 8))) {
1626                         my $spaces = ' ' x $count;
1627                         $line =~ s/\t/$spaces/;
1628                 }
1629         }
1630
1631         return $line;
1632 }
1633
1634 sub project_in_list {
1635         my $project = shift;
1636         my @list = git_get_projects_list();
1637         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1638 }
1639
1640 ## ----------------------------------------------------------------------
1641 ## HTML aware string manipulation
1642
1643 # Try to chop given string on a word boundary between position
1644 # $len and $len+$add_len. If there is no word boundary there,
1645 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1646 # (marking chopped part) would be longer than given string.
1647 sub chop_str {
1648         my $str = shift;
1649         my $len = shift;
1650         my $add_len = shift || 10;
1651         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1652
1653         # Make sure perl knows it is utf8 encoded so we don't
1654         # cut in the middle of a utf8 multibyte char.
1655         $str = to_utf8($str);
1656
1657         # allow only $len chars, but don't cut a word if it would fit in $add_len
1658         # if it doesn't fit, cut it if it's still longer than the dots we would add
1659         # remove chopped character entities entirely
1660
1661         # when chopping in the middle, distribute $len into left and right part
1662         # return early if chopping wouldn't make string shorter
1663         if ($where eq 'center') {
1664                 return $str if ($len + 5 >= length($str)); # filler is length 5
1665                 $len = int($len/2);
1666         } else {
1667                 return $str if ($len + 4 >= length($str)); # filler is length 4
1668         }
1669
1670         # regexps: ending and beginning with word part up to $add_len
1671         my $endre = qr/.{$len}\w{0,$add_len}/;
1672         my $begre = qr/\w{0,$add_len}.{$len}/;
1673
1674         if ($where eq 'left') {
1675                 $str =~ m/^(.*?)($begre)$/;
1676                 my ($lead, $body) = ($1, $2);
1677                 if (length($lead) > 4) {
1678                         $lead = " ...";
1679                 }
1680                 return "$lead$body";
1681
1682         } elsif ($where eq 'center') {
1683                 $str =~ m/^($endre)(.*)$/;
1684                 my ($left, $str)  = ($1, $2);
1685                 $str =~ m/^(.*?)($begre)$/;
1686                 my ($mid, $right) = ($1, $2);
1687                 if (length($mid) > 5) {
1688                         $mid = " ... ";
1689                 }
1690                 return "$left$mid$right";
1691
1692         } else {
1693                 $str =~ m/^($endre)(.*)$/;
1694                 my $body = $1;
1695                 my $tail = $2;
1696                 if (length($tail) > 4) {
1697                         $tail = "... ";
1698                 }
1699                 return "$body$tail";
1700         }
1701 }
1702
1703 # takes the same arguments as chop_str, but also wraps a <span> around the
1704 # result with a title attribute if it does get chopped. Additionally, the
1705 # string is HTML-escaped.
1706 sub chop_and_escape_str {
1707         my ($str) = @_;
1708
1709         my $chopped = chop_str(@_);
1710         $str = to_utf8($str);
1711         if ($chopped eq $str) {
1712                 return esc_html($chopped);
1713         } else {
1714                 $str =~ s/[[:cntrl:]]/?/g;
1715                 return $cgi->span({-title=>$str}, esc_html($chopped));
1716         }
1717 }
1718
1719 # Highlight selected fragments of string, using given CSS class,
1720 # and escape HTML.  It is assumed that fragments do not overlap.
1721 # Regions are passed as list of pairs (array references).
1722 #
1723 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1724 # '<span class="mark">foo</span>bar'
1725 sub esc_html_hl_regions {
1726         my ($str, $css_class, @sel) = @_;
1727         return esc_html($str) unless @sel;
1728
1729         my $out = '';
1730         my $pos = 0;
1731
1732         for my $s (@sel) {
1733                 $out .= esc_html(substr($str, $pos, $s->[0] - $pos))
1734                         if ($s->[0] - $pos > 0);
1735                 $out .= $cgi->span({-class => $css_class},
1736                                    esc_html(substr($str, $s->[0], $s->[1] - $s->[0])));
1737
1738                 $pos = $s->[1];
1739         }
1740         $out .= esc_html(substr($str, $pos))
1741                 if ($pos < length($str));
1742
1743         return $out;
1744 }
1745
1746 # highlight match (if any), and escape HTML
1747 sub esc_html_match_hl {
1748         my ($str, $regexp) = @_;
1749         return esc_html($str) unless defined $regexp;
1750
1751         my @matches;
1752         while ($str =~ /$regexp/g) {
1753                 push @matches, [$-[0], $+[0]];
1754         }
1755         return esc_html($str) unless @matches;
1756
1757         return esc_html_hl_regions($str, 'match', @matches);
1758 }
1759
1760 ## ----------------------------------------------------------------------
1761 ## functions returning short strings
1762
1763 # CSS class for given age value (in seconds)
1764 sub age_class {
1765         my $age = shift;
1766
1767         if (!defined $age) {
1768                 return "noage";
1769         } elsif ($age < 60*60*2) {
1770                 return "age0";
1771         } elsif ($age < 60*60*24*2) {
1772                 return "age1";
1773         } else {
1774                 return "age2";
1775         }
1776 }
1777
1778 # convert age in seconds to "nn units ago" string
1779 sub age_string {
1780         my $age = shift;
1781         my $age_str;
1782
1783         if ($age > 60*60*24*365*2) {
1784                 $age_str = (int $age/60/60/24/365);
1785                 $age_str .= " years ago";
1786         } elsif ($age > 60*60*24*(365/12)*2) {
1787                 $age_str = int $age/60/60/24/(365/12);
1788                 $age_str .= " months ago";
1789         } elsif ($age > 60*60*24*7*2) {
1790                 $age_str = int $age/60/60/24/7;
1791                 $age_str .= " weeks ago";
1792         } elsif ($age > 60*60*24*2) {
1793                 $age_str = int $age/60/60/24;
1794                 $age_str .= " days ago";
1795         } elsif ($age > 60*60*2) {
1796                 $age_str = int $age/60/60;
1797                 $age_str .= " hours ago";
1798         } elsif ($age > 60*2) {
1799                 $age_str = int $age/60;
1800                 $age_str .= " min ago";
1801         } elsif ($age > 2) {
1802                 $age_str = int $age;
1803                 $age_str .= " sec ago";
1804         } else {
1805                 $age_str .= " right now";
1806         }
1807         return $age_str;
1808 }
1809
1810 use constant {
1811         S_IFINVALID => 0030000,
1812         S_IFGITLINK => 0160000,
1813 };
1814
1815 # submodule/subproject, a commit object reference
1816 sub S_ISGITLINK {
1817         my $mode = shift;
1818
1819         return (($mode & S_IFMT) == S_IFGITLINK)
1820 }
1821
1822 # convert file mode in octal to symbolic file mode string
1823 sub mode_str {
1824         my $mode = oct shift;
1825
1826         if (S_ISGITLINK($mode)) {
1827                 return 'm---------';
1828         } elsif (S_ISDIR($mode & S_IFMT)) {
1829                 return 'drwxr-xr-x';
1830         } elsif (S_ISLNK($mode)) {
1831                 return 'lrwxrwxrwx';
1832         } elsif (S_ISREG($mode)) {
1833                 # git cares only about the executable bit
1834                 if ($mode & S_IXUSR) {
1835                         return '-rwxr-xr-x';
1836                 } else {
1837                         return '-rw-r--r--';
1838                 };
1839         } else {
1840                 return '----------';
1841         }
1842 }
1843
1844 # convert file mode in octal to file type string
1845 sub file_type {
1846         my $mode = shift;
1847
1848         if ($mode !~ m/^[0-7]+$/) {
1849                 return $mode;
1850         } else {
1851                 $mode = oct $mode;
1852         }
1853
1854         if (S_ISGITLINK($mode)) {
1855                 return "submodule";
1856         } elsif (S_ISDIR($mode & S_IFMT)) {
1857                 return "directory";
1858         } elsif (S_ISLNK($mode)) {
1859                 return "symlink";
1860         } elsif (S_ISREG($mode)) {
1861                 return "file";
1862         } else {
1863                 return "unknown";
1864         }
1865 }
1866
1867 # convert file mode in octal to file type description string
1868 sub file_type_long {
1869         my $mode = shift;
1870
1871         if ($mode !~ m/^[0-7]+$/) {
1872                 return $mode;
1873         } else {
1874                 $mode = oct $mode;
1875         }
1876
1877         if (S_ISGITLINK($mode)) {
1878                 return "submodule";
1879         } elsif (S_ISDIR($mode & S_IFMT)) {
1880                 return "directory";
1881         } elsif (S_ISLNK($mode)) {
1882                 return "symlink";
1883         } elsif (S_ISREG($mode)) {
1884                 if ($mode & S_IXUSR) {
1885                         return "executable";
1886                 } else {
1887                         return "file";
1888                 };
1889         } else {
1890                 return "unknown";
1891         }
1892 }
1893
1894
1895 ## ----------------------------------------------------------------------
1896 ## functions returning short HTML fragments, or transforming HTML fragments
1897 ## which don't belong to other sections
1898
1899 # format line of commit message.
1900 sub format_log_line_html {
1901         my $line = shift;
1902
1903         $line = esc_html($line, -nbsp=>1);
1904         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1905                 $cgi->a({-href => href(action=>"object", hash=>$1),
1906                                         -class => "text"}, $1);
1907         }eg;
1908
1909         return $line;
1910 }
1911
1912 # format marker of refs pointing to given object
1913
1914 # the destination action is chosen based on object type and current context:
1915 # - for annotated tags, we choose the tag view unless it's the current view
1916 #   already, in which case we go to shortlog view
1917 # - for other refs, we keep the current view if we're in history, shortlog or
1918 #   log view, and select shortlog otherwise
1919 sub format_ref_marker {
1920         my ($refs, $id) = @_;
1921         my $markers = '';
1922
1923         if (defined $refs->{$id}) {
1924                 foreach my $ref (@{$refs->{$id}}) {
1925                         # this code exploits the fact that non-lightweight tags are the
1926                         # only indirect objects, and that they are the only objects for which
1927                         # we want to use tag instead of shortlog as action
1928                         my ($type, $name) = qw();
1929                         my $indirect = ($ref =~ s/\^\{\}$//);
1930                         # e.g. tags/v2.6.11 or heads/next
1931                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1932                                 $type = $1;
1933                                 $name = $2;
1934                         } else {
1935                                 $type = "ref";
1936                                 $name = $ref;
1937                         }
1938
1939                         my $class = $type;
1940                         $class .= " indirect" if $indirect;
1941
1942                         my $dest_action = "shortlog";
1943
1944                         if ($indirect) {
1945                                 $dest_action = "tag" unless $action eq "tag";
1946                         } elsif ($action =~ /^(history|(short)?log)$/) {
1947                                 $dest_action = $action;
1948                         }
1949
1950                         my $dest = "";
1951                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1952                         $dest .= $ref;
1953
1954                         my $link = $cgi->a({
1955                                 -href => href(
1956                                         action=>$dest_action,
1957                                         hash=>$dest
1958                                 )}, $name);
1959
1960                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1961                                 $link . "</span>";
1962                 }
1963         }
1964
1965         if ($markers) {
1966                 return ' <span class="refs">'. $markers . '</span>';
1967         } else {
1968                 return "";
1969         }
1970 }
1971
1972 # format, perhaps shortened and with markers, title line
1973 sub format_subject_html {
1974         my ($long, $short, $href, $extra) = @_;
1975         $extra = '' unless defined($extra);
1976
1977         if (length($short) < length($long)) {
1978                 $long =~ s/[[:cntrl:]]/?/g;
1979                 return $cgi->a({-href => $href, -class => "list subject",
1980                                 -title => to_utf8($long)},
1981                        esc_html($short)) . $extra;
1982         } else {
1983                 return $cgi->a({-href => $href, -class => "list subject"},
1984                        esc_html($long)) . $extra;
1985         }
1986 }
1987
1988 # Rather than recomputing the url for an email multiple times, we cache it
1989 # after the first hit. This gives a visible benefit in views where the avatar
1990 # for the same email is used repeatedly (e.g. shortlog).
1991 # The cache is shared by all avatar engines (currently gravatar only), which
1992 # are free to use it as preferred. Since only one avatar engine is used for any
1993 # given page, there's no risk for cache conflicts.
1994 our %avatar_cache = ();
1995
1996 # Compute the picon url for a given email, by using the picon search service over at
1997 # http://www.cs.indiana.edu/picons/search.html
1998 sub picon_url {
1999         my $email = lc shift;
2000         if (!$avatar_cache{$email}) {
2001                 my ($user, $domain) = split('@', $email);
2002                 $avatar_cache{$email} =
2003                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2004                         "$domain/$user/" .
2005                         "users+domains+unknown/up/single";
2006         }
2007         return $avatar_cache{$email};
2008 }
2009
2010 # Compute the gravatar url for a given email, if it's not in the cache already.
2011 # Gravatar stores only the part of the URL before the size, since that's the
2012 # one computationally more expensive. This also allows reuse of the cache for
2013 # different sizes (for this particular engine).
2014 sub gravatar_url {
2015         my $email = lc shift;
2016         my $size = shift;
2017         $avatar_cache{$email} ||=
2018                 "http://www.gravatar.com/avatar/" .
2019                         Digest::MD5::md5_hex($email) . "?s=";
2020         return $avatar_cache{$email} . $size;
2021 }
2022
2023 # Insert an avatar for the given $email at the given $size if the feature
2024 # is enabled.
2025 sub git_get_avatar {
2026         my ($email, %opts) = @_;
2027         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2028         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2029         $opts{-size} ||= 'default';
2030         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2031         my $url = "";
2032         if ($git_avatar eq 'gravatar') {
2033                 $url = gravatar_url($email, $size);
2034         } elsif ($git_avatar eq 'picon') {
2035                 $url = picon_url($email);
2036         }
2037         # Other providers can be added by extending the if chain, defining $url
2038         # as needed. If no variant puts something in $url, we assume avatars
2039         # are completely disabled/unavailable.
2040         if ($url) {
2041                 return $pre_white .
2042                        "<img width=\"$size\" " .
2043                             "class=\"avatar\" " .
2044                             "src=\"".esc_url($url)."\" " .
2045                             "alt=\"\" " .
2046                        "/>" . $post_white;
2047         } else {
2048                 return "";
2049         }
2050 }
2051
2052 sub format_search_author {
2053         my ($author, $searchtype, $displaytext) = @_;
2054         my $have_search = gitweb_check_feature('search');
2055
2056         if ($have_search) {
2057                 my $performed = "";
2058                 if ($searchtype eq 'author') {
2059                         $performed = "authored";
2060                 } elsif ($searchtype eq 'committer') {
2061                         $performed = "committed";
2062                 }
2063
2064                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2065                                 searchtext=>$author,
2066                                 searchtype=>$searchtype), class=>"list",
2067                                 title=>"Search for commits $performed by $author"},
2068                                 $displaytext);
2069
2070         } else {
2071                 return $displaytext;
2072         }
2073 }
2074
2075 # format the author name of the given commit with the given tag
2076 # the author name is chopped and escaped according to the other
2077 # optional parameters (see chop_str).
2078 sub format_author_html {
2079         my $tag = shift;
2080         my $co = shift;
2081         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2082         return "<$tag class=\"author\">" .
2083                format_search_author($co->{'author_name'}, "author",
2084                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2085                        $author) .
2086                "</$tag>";
2087 }
2088
2089 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2090 sub format_git_diff_header_line {
2091         my $line = shift;
2092         my $diffinfo = shift;
2093         my ($from, $to) = @_;
2094
2095         if ($diffinfo->{'nparents'}) {
2096                 # combined diff
2097                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2098                 if ($to->{'href'}) {
2099                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2100                                          esc_path($to->{'file'}));
2101                 } else { # file was deleted (no href)
2102                         $line .= esc_path($to->{'file'});
2103                 }
2104         } else {
2105                 # "ordinary" diff
2106                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2107                 if ($from->{'href'}) {
2108                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2109                                          'a/' . esc_path($from->{'file'}));
2110                 } else { # file was added (no href)
2111                         $line .= 'a/' . esc_path($from->{'file'});
2112                 }
2113                 $line .= ' ';
2114                 if ($to->{'href'}) {
2115                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2116                                          'b/' . esc_path($to->{'file'}));
2117                 } else { # file was deleted
2118                         $line .= 'b/' . esc_path($to->{'file'});
2119                 }
2120         }
2121
2122         return "<div class=\"diff header\">$line</div>\n";
2123 }
2124
2125 # format extended diff header line, before patch itself
2126 sub format_extended_diff_header_line {
2127         my $line = shift;
2128         my $diffinfo = shift;
2129         my ($from, $to) = @_;
2130
2131         # match <path>
2132         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2133                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2134                                        esc_path($from->{'file'}));
2135         }
2136         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2137                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2138                                  esc_path($to->{'file'}));
2139         }
2140         # match single <mode>
2141         if ($line =~ m/\s(\d{6})$/) {
2142                 $line .= '<span class="info"> (' .
2143                          file_type_long($1) .
2144                          ')</span>';
2145         }
2146         # match <hash>
2147         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2148                 # can match only for combined diff
2149                 $line = 'index ';
2150                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2151                         if ($from->{'href'}[$i]) {
2152                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2153                                                   -class=>"hash"},
2154                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2155                         } else {
2156                                 $line .= '0' x 7;
2157                         }
2158                         # separator
2159                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2160                 }
2161                 $line .= '..';
2162                 if ($to->{'href'}) {
2163                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2164                                          substr($diffinfo->{'to_id'},0,7));
2165                 } else {
2166                         $line .= '0' x 7;
2167                 }
2168
2169         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2170                 # can match only for ordinary diff
2171                 my ($from_link, $to_link);
2172                 if ($from->{'href'}) {
2173                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2174                                              substr($diffinfo->{'from_id'},0,7));
2175                 } else {
2176                         $from_link = '0' x 7;
2177                 }
2178                 if ($to->{'href'}) {
2179                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2180                                            substr($diffinfo->{'to_id'},0,7));
2181                 } else {
2182                         $to_link = '0' x 7;
2183                 }
2184                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2185                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2186         }
2187
2188         return $line . "<br/>\n";
2189 }
2190
2191 # format from-file/to-file diff header
2192 sub format_diff_from_to_header {
2193         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2194         my $line;
2195         my $result = '';
2196
2197         $line = $from_line;
2198         #assert($line =~ m/^---/) if DEBUG;
2199         # no extra formatting for "^--- /dev/null"
2200         if (! $diffinfo->{'nparents'}) {
2201                 # ordinary (single parent) diff
2202                 if ($line =~ m!^--- "?a/!) {
2203                         if ($from->{'href'}) {
2204                                 $line = '--- a/' .
2205                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2206                                                 esc_path($from->{'file'}));
2207                         } else {
2208                                 $line = '--- a/' .
2209                                         esc_path($from->{'file'});
2210                         }
2211                 }
2212                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2213
2214         } else {
2215                 # combined diff (merge commit)
2216                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2217                         if ($from->{'href'}[$i]) {
2218                                 $line = '--- ' .
2219                                         $cgi->a({-href=>href(action=>"blobdiff",
2220                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2221                                                              hash_parent_base=>$parents[$i],
2222                                                              file_parent=>$from->{'file'}[$i],
2223                                                              hash=>$diffinfo->{'to_id'},
2224                                                              hash_base=>$hash,
2225                                                              file_name=>$to->{'file'}),
2226                                                  -class=>"path",
2227                                                  -title=>"diff" . ($i+1)},
2228                                                 $i+1) .
2229                                         '/' .
2230                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2231                                                 esc_path($from->{'file'}[$i]));
2232                         } else {
2233                                 $line = '--- /dev/null';
2234                         }
2235                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2236                 }
2237         }
2238
2239         $line = $to_line;
2240         #assert($line =~ m/^\+\+\+/) if DEBUG;
2241         # no extra formatting for "^+++ /dev/null"
2242         if ($line =~ m!^\+\+\+ "?b/!) {
2243                 if ($to->{'href'}) {
2244                         $line = '+++ b/' .
2245                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2246                                         esc_path($to->{'file'}));
2247                 } else {
2248                         $line = '+++ b/' .
2249                                 esc_path($to->{'file'});
2250                 }
2251         }
2252         $result .= qq!<div class="diff to_file">$line</div>\n!;
2253
2254         return $result;
2255 }
2256
2257 # create note for patch simplified by combined diff
2258 sub format_diff_cc_simplified {
2259         my ($diffinfo, @parents) = @_;
2260         my $result = '';
2261
2262         $result .= "<div class=\"diff header\">" .
2263                    "diff --cc ";
2264         if (!is_deleted($diffinfo)) {
2265                 $result .= $cgi->a({-href => href(action=>"blob",
2266                                                   hash_base=>$hash,
2267                                                   hash=>$diffinfo->{'to_id'},
2268                                                   file_name=>$diffinfo->{'to_file'}),
2269                                     -class => "path"},
2270                                    esc_path($diffinfo->{'to_file'}));
2271         } else {
2272                 $result .= esc_path($diffinfo->{'to_file'});
2273         }
2274         $result .= "</div>\n" . # class="diff header"
2275                    "<div class=\"diff nodifferences\">" .
2276                    "Simple merge" .
2277                    "</div>\n"; # class="diff nodifferences"
2278
2279         return $result;
2280 }
2281
2282 sub diff_line_class {
2283         my ($line, $from, $to) = @_;
2284
2285         # ordinary diff
2286         my $num_sign = 1;
2287         # combined diff
2288         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2289                 $num_sign = scalar @{$from->{'href'}};
2290         }
2291
2292         my @diff_line_classifier = (
2293                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2294                 { regexp => qr/^\\/,               class => "incomplete"  },
2295                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2296                 # classifier for context must come before classifier add/rem,
2297                 # or we would have to use more complicated regexp, for example
2298                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2299                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2300                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2301         );
2302         for my $clsfy (@diff_line_classifier) {
2303                 return $clsfy->{'class'}
2304                         if ($line =~ $clsfy->{'regexp'});
2305         }
2306
2307         # fallback
2308         return "";
2309 }
2310
2311 # assumes that $from and $to are defined and correctly filled,
2312 # and that $line holds a line of chunk header for unified diff
2313 sub format_unidiff_chunk_header {
2314         my ($line, $from, $to) = @_;
2315
2316         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2317                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2318
2319         $from_lines = 0 unless defined $from_lines;
2320         $to_lines   = 0 unless defined $to_lines;
2321
2322         if ($from->{'href'}) {
2323                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2324                                      -class=>"list"}, $from_text);
2325         }
2326         if ($to->{'href'}) {
2327                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2328                                      -class=>"list"}, $to_text);
2329         }
2330         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2331                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2332         return $line;
2333 }
2334
2335 # assumes that $from and $to are defined and correctly filled,
2336 # and that $line holds a line of chunk header for combined diff
2337 sub format_cc_diff_chunk_header {
2338         my ($line, $from, $to) = @_;
2339
2340         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2341         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2342
2343         @from_text = split(' ', $ranges);
2344         for (my $i = 0; $i < @from_text; ++$i) {
2345                 ($from_start[$i], $from_nlines[$i]) =
2346                         (split(',', substr($from_text[$i], 1)), 0);
2347         }
2348
2349         $to_text   = pop @from_text;
2350         $to_start  = pop @from_start;
2351         $to_nlines = pop @from_nlines;
2352
2353         $line = "<span class=\"chunk_info\">$prefix ";
2354         for (my $i = 0; $i < @from_text; ++$i) {
2355                 if ($from->{'href'}[$i]) {
2356                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2357                                           -class=>"list"}, $from_text[$i]);
2358                 } else {
2359                         $line .= $from_text[$i];
2360                 }
2361                 $line .= " ";
2362         }
2363         if ($to->{'href'}) {
2364                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2365                                   -class=>"list"}, $to_text);
2366         } else {
2367                 $line .= $to_text;
2368         }
2369         $line .= " $prefix</span>" .
2370                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2371         return $line;
2372 }
2373
2374 # process patch (diff) line (not to be used for diff headers),
2375 # returning class and HTML-formatted (but not wrapped) line
2376 sub process_diff_line {
2377         my $line = shift;
2378         my ($from, $to) = @_;
2379
2380         my $diff_class = diff_line_class($line, $from, $to);
2381
2382         chomp $line;
2383         $line = untabify($line);
2384
2385         if ($from && $to && $line =~ m/^\@{2} /) {
2386                 $line = format_unidiff_chunk_header($line, $from, $to);
2387                 return $diff_class, $line;
2388
2389         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2390                 $line = format_cc_diff_chunk_header($line, $from, $to);
2391                 return $diff_class, $line;
2392
2393         }
2394         return $diff_class, esc_html($line, -nbsp=>1);
2395 }
2396
2397 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2398 # linked.  Pass the hash of the tree/commit to snapshot.
2399 sub format_snapshot_links {
2400         my ($hash) = @_;
2401         my $num_fmts = @snapshot_fmts;
2402         if ($num_fmts > 1) {
2403                 # A parenthesized list of links bearing format names.
2404                 # e.g. "snapshot (_tar.gz_ _zip_)"
2405                 return "snapshot (" . join(' ', map
2406                         $cgi->a({
2407                                 -href => href(
2408                                         action=>"snapshot",
2409                                         hash=>$hash,
2410                                         snapshot_format=>$_
2411                                 )
2412                         }, $known_snapshot_formats{$_}{'display'})
2413                 , @snapshot_fmts) . ")";
2414         } elsif ($num_fmts == 1) {
2415                 # A single "snapshot" link whose tooltip bears the format name.
2416                 # i.e. "_snapshot_"
2417                 my ($fmt) = @snapshot_fmts;
2418                 return
2419                         $cgi->a({
2420                                 -href => href(
2421                                         action=>"snapshot",
2422                                         hash=>$hash,
2423                                         snapshot_format=>$fmt
2424                                 ),
2425                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2426                         }, "snapshot");
2427         } else { # $num_fmts == 0
2428                 return undef;
2429         }
2430 }
2431
2432 ## ......................................................................
2433 ## functions returning values to be passed, perhaps after some
2434 ## transformation, to other functions; e.g. returning arguments to href()
2435
2436 # returns hash to be passed to href to generate gitweb URL
2437 # in -title key it returns description of link
2438 sub get_feed_info {
2439         my $format = shift || 'Atom';
2440         my %res = (action => lc($format));
2441
2442         # feed links are possible only for project views
2443         return unless (defined $project);
2444         # some views should link to OPML, or to generic project feed,
2445         # or don't have specific feed yet (so they should use generic)
2446         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2447
2448         my $branch;
2449         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2450         # from tag links; this also makes possible to detect branch links
2451         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2452             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2453                 $branch = $1;
2454         }
2455         # find log type for feed description (title)
2456         my $type = 'log';
2457         if (defined $file_name) {
2458                 $type  = "history of $file_name";
2459                 $type .= "/" if ($action eq 'tree');
2460                 $type .= " on '$branch'" if (defined $branch);
2461         } else {
2462                 $type = "log of $branch" if (defined $branch);
2463         }
2464
2465         $res{-title} = $type;
2466         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2467         $res{'file_name'} = $file_name;
2468
2469         return %res;
2470 }
2471
2472 ## ----------------------------------------------------------------------
2473 ## git utility subroutines, invoking git commands
2474
2475 # returns path to the core git executable and the --git-dir parameter as list
2476 sub git_cmd {
2477         $number_of_git_cmds++;
2478         return $GIT, '--git-dir='.$git_dir;
2479 }
2480
2481 # quote the given arguments for passing them to the shell
2482 # quote_command("command", "arg 1", "arg with ' and ! characters")
2483 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2484 # Try to avoid using this function wherever possible.
2485 sub quote_command {
2486         return join(' ',
2487                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2488 }
2489
2490 # get HEAD ref of given project as hash
2491 sub git_get_head_hash {
2492         return git_get_full_hash(shift, 'HEAD');
2493 }
2494
2495 sub git_get_full_hash {
2496         return git_get_hash(@_);
2497 }
2498
2499 sub git_get_short_hash {
2500         return git_get_hash(@_, '--short=7');
2501 }
2502
2503 sub git_get_hash {
2504         my ($project, $hash, @options) = @_;
2505         my $o_git_dir = $git_dir;
2506         my $retval = undef;
2507         $git_dir = "$projectroot/$project";
2508         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2509             '--verify', '-q', @options, $hash) {
2510                 $retval = <$fd>;
2511                 chomp $retval if defined $retval;
2512                 close $fd;
2513         }
2514         if (defined $o_git_dir) {
2515                 $git_dir = $o_git_dir;
2516         }
2517         return $retval;
2518 }
2519
2520 # get type of given object
2521 sub git_get_type {
2522         my $hash = shift;
2523
2524         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2525         my $type = <$fd>;
2526         close $fd or return;
2527         chomp $type;
2528         return $type;
2529 }
2530
2531 # repository configuration
2532 our $config_file = '';
2533 our %config;
2534
2535 # store multiple values for single key as anonymous array reference
2536 # single values stored directly in the hash, not as [ <value> ]
2537 sub hash_set_multi {
2538         my ($hash, $key, $value) = @_;
2539
2540         if (!exists $hash->{$key}) {
2541                 $hash->{$key} = $value;
2542         } elsif (!ref $hash->{$key}) {
2543                 $hash->{$key} = [ $hash->{$key}, $value ];
2544         } else {
2545                 push @{$hash->{$key}}, $value;
2546         }
2547 }
2548
2549 # return hash of git project configuration
2550 # optionally limited to some section, e.g. 'gitweb'
2551 sub git_parse_project_config {
2552         my $section_regexp = shift;
2553         my %config;
2554
2555         local $/ = "\0";
2556
2557         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2558                 or return;
2559
2560         while (my $keyval = <$fh>) {
2561                 chomp $keyval;
2562                 my ($key, $value) = split(/\n/, $keyval, 2);
2563
2564                 hash_set_multi(\%config, $key, $value)
2565                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2566         }
2567         close $fh;
2568
2569         return %config;
2570 }
2571
2572 # convert config value to boolean: 'true' or 'false'
2573 # no value, number > 0, 'true' and 'yes' values are true
2574 # rest of values are treated as false (never as error)
2575 sub config_to_bool {
2576         my $val = shift;
2577
2578         return 1 if !defined $val;             # section.key
2579
2580         # strip leading and trailing whitespace
2581         $val =~ s/^\s+//;
2582         $val =~ s/\s+$//;
2583
2584         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2585                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2586 }
2587
2588 # convert config value to simple decimal number
2589 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2590 # to be multiplied by 1024, 1048576, or 1073741824
2591 sub config_to_int {
2592         my $val = shift;
2593
2594         # strip leading and trailing whitespace
2595         $val =~ s/^\s+//;
2596         $val =~ s/\s+$//;
2597
2598         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2599                 $unit = lc($unit);
2600                 # unknown unit is treated as 1
2601                 return $num * ($unit eq 'g' ? 1073741824 :
2602                                $unit eq 'm' ?    1048576 :
2603                                $unit eq 'k' ?       1024 : 1);
2604         }
2605         return $val;
2606 }
2607
2608 # convert config value to array reference, if needed
2609 sub config_to_multi {
2610         my $val = shift;
2611
2612         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2613 }
2614
2615 sub git_get_project_config {
2616         my ($key, $type) = @_;
2617
2618         return unless defined $git_dir;
2619
2620         # key sanity check
2621         return unless ($key);
2622         # only subsection, if exists, is case sensitive,
2623         # and not lowercased by 'git config -z -l'
2624         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2625                 $key = join(".", lc($hi), $mi, lc($lo));
2626         } else {
2627                 $key = lc($key);
2628         }
2629         $key =~ s/^gitweb\.//;
2630         return if ($key =~ m/\W/);
2631
2632         # type sanity check
2633         if (defined $type) {
2634                 $type =~ s/^--//;
2635                 $type = undef
2636                         unless ($type eq 'bool' || $type eq 'int');
2637         }
2638
2639         # get config
2640         if (!defined $config_file ||
2641             $config_file ne "$git_dir/config") {
2642                 %config = git_parse_project_config('gitweb');
2643                 $config_file = "$git_dir/config";
2644         }
2645
2646         # check if config variable (key) exists
2647         return unless exists $config{"gitweb.$key"};
2648
2649         # ensure given type
2650         if (!defined $type) {
2651                 return $config{"gitweb.$key"};
2652         } elsif ($type eq 'bool') {
2653                 # backward compatibility: 'git config --bool' returns true/false
2654                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2655         } elsif ($type eq 'int') {
2656                 return config_to_int($config{"gitweb.$key"});
2657         }
2658         return $config{"gitweb.$key"};
2659 }
2660
2661 # get hash of given path at given ref
2662 sub git_get_hash_by_path {
2663         my $base = shift;
2664         my $path = shift || return undef;
2665         my $type = shift;
2666
2667         $path =~ s,/+$,,;
2668
2669         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2670                 or die_error(500, "Open git-ls-tree failed");
2671         my $line = <$fd>;
2672         close $fd or return undef;
2673
2674         if (!defined $line) {
2675                 # there is no tree or hash given by $path at $base
2676                 return undef;
2677         }
2678
2679         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2680         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2681         if (defined $type && $type ne $2) {
2682                 # type doesn't match
2683                 return undef;
2684         }
2685         return $3;
2686 }
2687
2688 # get path of entry with given hash at given tree-ish (ref)
2689 # used to get 'from' filename for combined diff (merge commit) for renames
2690 sub git_get_path_by_hash {
2691         my $base = shift || return;
2692         my $hash = shift || return;
2693
2694         local $/ = "\0";
2695
2696         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2697                 or return undef;
2698         while (my $line = <$fd>) {
2699                 chomp $line;
2700
2701                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2702                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2703                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2704                         close $fd;
2705                         return $1;
2706                 }
2707         }
2708         close $fd;
2709         return undef;
2710 }
2711
2712 ## ......................................................................
2713 ## git utility functions, directly accessing git repository
2714
2715 # get the value of config variable either from file named as the variable
2716 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2717 # configuration variable in the repository config file.
2718 sub git_get_file_or_project_config {
2719         my ($path, $name) = @_;
2720
2721         $git_dir = "$projectroot/$path";
2722         open my $fd, '<', "$git_dir/$name"
2723                 or return git_get_project_config($name);
2724         my $conf = <$fd>;
2725         close $fd;
2726         if (defined $conf) {
2727                 chomp $conf;
2728         }
2729         return $conf;
2730 }
2731
2732 sub git_get_project_description {
2733         my $path = shift;
2734         return git_get_file_or_project_config($path, 'description');
2735 }
2736
2737 sub git_get_project_category {
2738         my $path = shift;
2739         return git_get_file_or_project_config($path, 'category');
2740 }
2741
2742
2743 # supported formats:
2744 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2745 #   - if its contents is a number, use it as tag weight,
2746 #   - otherwise add a tag with weight 1
2747 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2748 #   the same value multiple times increases tag weight
2749 # * `gitweb.ctag' multi-valued repo config variable
2750 sub git_get_project_ctags {
2751         my $project = shift;
2752         my $ctags = {};
2753
2754         $git_dir = "$projectroot/$project";
2755         if (opendir my $dh, "$git_dir/ctags") {
2756                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2757                 foreach my $tagfile (@files) {
2758                         open my $ct, '<', $tagfile
2759                                 or next;
2760                         my $val = <$ct>;
2761                         chomp $val if $val;
2762                         close $ct;
2763
2764                         (my $ctag = $tagfile) =~ s#.*/##;
2765                         if ($val =~ /^\d+$/) {
2766                                 $ctags->{$ctag} = $val;
2767                         } else {
2768                                 $ctags->{$ctag} = 1;
2769                         }
2770                 }
2771                 closedir $dh;
2772
2773         } elsif (open my $fh, '<', "$git_dir/ctags") {
2774                 while (my $line = <$fh>) {
2775                         chomp $line;
2776                         $ctags->{$line}++ if $line;
2777                 }
2778                 close $fh;
2779
2780         } else {
2781                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2782                 foreach my $tag (@$taglist) {
2783                         $ctags->{$tag}++;
2784                 }
2785         }
2786
2787         return $ctags;
2788 }
2789
2790 # return hash, where keys are content tags ('ctags'),
2791 # and values are sum of weights of given tag in every project
2792 sub git_gather_all_ctags {
2793         my $projects = shift;
2794         my $ctags = {};
2795
2796         foreach my $p (@$projects) {
2797                 foreach my $ct (keys %{$p->{'ctags'}}) {
2798                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2799                 }
2800         }
2801
2802         return $ctags;
2803 }
2804
2805 sub git_populate_project_tagcloud {
2806         my $ctags = shift;
2807
2808         # First, merge different-cased tags; tags vote on casing
2809         my %ctags_lc;
2810         foreach (keys %$ctags) {
2811                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2812                 if (not $ctags_lc{lc $_}->{topcount}
2813                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2814                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2815                         $ctags_lc{lc $_}->{topname} = $_;
2816                 }
2817         }
2818
2819         my $cloud;
2820         my $matched = $input_params{'ctag'};
2821         if (eval { require HTML::TagCloud; 1; }) {
2822                 $cloud = HTML::TagCloud->new;
2823                 foreach my $ctag (sort keys %ctags_lc) {
2824                         # Pad the title with spaces so that the cloud looks
2825                         # less crammed.
2826                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2827                         $title =~ s/ /&nbsp;/g;
2828                         $title =~ s/^/&nbsp;/g;
2829                         $title =~ s/$/&nbsp;/g;
2830                         if (defined $matched && $matched eq $ctag) {
2831                                 $title = qq(<span class="match">$title</span>);
2832                         }
2833                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2834                                     $ctags_lc{$ctag}->{count});
2835                 }
2836         } else {
2837                 $cloud = {};
2838                 foreach my $ctag (keys %ctags_lc) {
2839                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2840                         if (defined $matched && $matched eq $ctag) {
2841                                 $title = qq(<span class="match">$title</span>);
2842                         }
2843                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2844                         $cloud->{$ctag}{ctag} =
2845                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2846                 }
2847         }
2848         return $cloud;
2849 }
2850
2851 sub git_show_project_tagcloud {
2852         my ($cloud, $count) = @_;
2853         if (ref $cloud eq 'HTML::TagCloud') {
2854                 return $cloud->html_and_css($count);
2855         } else {
2856                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2857                 return
2858                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2859                         join (', ', map {
2860                                 $cloud->{$_}->{'ctag'}
2861                         } splice(@tags, 0, $count)) .
2862                         '</div>';
2863         }
2864 }
2865
2866 sub git_get_project_url_list {
2867         my $path = shift;
2868
2869         $git_dir = "$projectroot/$path";
2870         open my $fd, '<', "$git_dir/cloneurl"
2871                 or return wantarray ?
2872                 @{ config_to_multi(git_get_project_config('url')) } :
2873                    config_to_multi(git_get_project_config('url'));
2874         my @git_project_url_list = map { chomp; $_ } <$fd>;
2875         close $fd;
2876
2877         return wantarray ? @git_project_url_list : \@git_project_url_list;
2878 }
2879
2880 sub git_get_projects_list {
2881         my $filter = shift || '';
2882         my $paranoid = shift;
2883         my @list;
2884
2885         if (-d $projects_list) {
2886                 # search in directory
2887                 my $dir = $projects_list;
2888                 # remove the trailing "/"
2889                 $dir =~ s!/+$!!;
2890                 my $pfxlen = length("$dir");
2891                 my $pfxdepth = ($dir =~ tr!/!!);
2892                 # when filtering, search only given subdirectory
2893                 if ($filter && !$paranoid) {
2894                         $dir .= "/$filter";
2895                         $dir =~ s!/+$!!;
2896                 }
2897
2898                 File::Find::find({
2899                         follow_fast => 1, # follow symbolic links
2900                         follow_skip => 2, # ignore duplicates
2901                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2902                         wanted => sub {
2903                                 # global variables
2904                                 our $project_maxdepth;
2905                                 our $projectroot;
2906                                 # skip project-list toplevel, if we get it.
2907                                 return if (m!^[/.]$!);
2908                                 # only directories can be git repositories
2909                                 return unless (-d $_);
2910                                 # don't traverse too deep (Find is super slow on os x)
2911                                 # $project_maxdepth excludes depth of $projectroot
2912                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2913                                         $File::Find::prune = 1;
2914                                         return;
2915                                 }
2916
2917                                 my $path = substr($File::Find::name, $pfxlen + 1);
2918                                 # paranoidly only filter here
2919                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2920                                         next;
2921                                 }
2922                                 # we check related file in $projectroot
2923                                 if (check_export_ok("$projectroot/$path")) {
2924                                         push @list, { path => $path };
2925                                         $File::Find::prune = 1;
2926                                 }
2927                         },
2928                 }, "$dir");
2929
2930         } elsif (-f $projects_list) {
2931                 # read from file(url-encoded):
2932                 # 'git%2Fgit.git Linus+Torvalds'
2933                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2934                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2935                 open my $fd, '<', $projects_list or return;
2936         PROJECT:
2937                 while (my $line = <$fd>) {
2938                         chomp $line;
2939                         my ($path, $owner) = split ' ', $line;
2940                         $path = unescape($path);
2941                         $owner = unescape($owner);
2942                         if (!defined $path) {
2943                                 next;
2944                         }
2945                         # if $filter is rpovided, check if $path begins with $filter
2946                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2947                                 next;
2948                         }
2949                         if (check_export_ok("$projectroot/$path")) {
2950                                 my $pr = {
2951                                         path => $path,
2952                                         owner => to_utf8($owner),
2953                                 };
2954                                 push @list, $pr;
2955                         }
2956                 }
2957                 close $fd;
2958         }
2959         return @list;
2960 }
2961
2962 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2963 # as side effects it sets 'forks' field to list of forks for forked projects
2964 sub filter_forks_from_projects_list {
2965         my $projects = shift;
2966
2967         my %trie; # prefix tree of directories (path components)
2968         # generate trie out of those directories that might contain forks
2969         foreach my $pr (@$projects) {
2970                 my $path = $pr->{'path'};
2971                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2972                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2973                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2974                 next unless (-d "$projectroot/$path"); # containing directory exists
2975                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2976
2977                 # add to trie
2978                 my @dirs = split('/', $path);
2979                 # walk the trie, until either runs out of components or out of trie
2980                 my $ref = \%trie;
2981                 while (scalar @dirs &&
2982                        exists($ref->{$dirs[0]})) {
2983                         $ref = $ref->{shift @dirs};
2984                 }
2985                 # create rest of trie structure from rest of components
2986                 foreach my $dir (@dirs) {
2987                         $ref = $ref->{$dir} = {};
2988                 }
2989                 # create end marker, store $pr as a data
2990                 $ref->{''} = $pr if (!exists $ref->{''});
2991         }
2992
2993         # filter out forks, by finding shortest prefix match for paths
2994         my @filtered;
2995  PROJECT:
2996         foreach my $pr (@$projects) {
2997                 # trie lookup
2998                 my $ref = \%trie;
2999         DIR:
3000                 foreach my $dir (split('/', $pr->{'path'})) {
3001                         if (exists $ref->{''}) {
3002                                 # found [shortest] prefix, is a fork - skip it
3003                                 push @{$ref->{''}{'forks'}}, $pr;
3004                                 next PROJECT;
3005                         }
3006                         if (!exists $ref->{$dir}) {
3007                                 # not in trie, cannot have prefix, not a fork
3008                                 push @filtered, $pr;
3009                                 next PROJECT;
3010                         }
3011                         # If the dir is there, we just walk one step down the trie.
3012                         $ref = $ref->{$dir};
3013                 }
3014                 # we ran out of trie
3015                 # (shouldn't happen: it's either no match, or end marker)
3016                 push @filtered, $pr;
3017         }
3018
3019         return @filtered;
3020 }
3021
3022 # note: fill_project_list_info must be run first,
3023 # for 'descr_long' and 'ctags' to be filled
3024 sub search_projects_list {
3025         my ($projlist, %opts) = @_;
3026         my $tagfilter  = $opts{'tagfilter'};
3027         my $searchtext = $opts{'searchtext'};
3028
3029         return @$projlist
3030                 unless ($tagfilter || $searchtext);
3031
3032         # searching projects require filling to be run before it;
3033         fill_project_list_info($projlist,
3034                                $tagfilter  ? 'ctags' : (),
3035                                $searchtext ? ('path', 'descr') : ());
3036         my @projects;
3037  PROJECT:
3038         foreach my $pr (@$projlist) {
3039
3040                 if ($tagfilter) {
3041                         next unless ref($pr->{'ctags'}) eq 'HASH';
3042                         next unless
3043                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3044                 }
3045
3046                 if ($searchtext) {
3047                         next unless
3048                                 $pr->{'path'} =~ /$searchtext/ ||
3049                                 $pr->{'descr_long'} =~ /$searchtext/;
3050                 }
3051
3052                 push @projects, $pr;
3053         }
3054
3055         return @projects;
3056 }
3057
3058 our $gitweb_project_owner = undef;
3059 sub git_get_project_list_from_file {
3060
3061         return if (defined $gitweb_project_owner);
3062
3063         $gitweb_project_owner = {};
3064         # read from file (url-encoded):
3065         # 'git%2Fgit.git Linus+Torvalds'
3066         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3067         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3068         if (-f $projects_list) {
3069                 open(my $fd, '<', $projects_list);
3070                 while (my $line = <$fd>) {
3071                         chomp $line;
3072                         my ($pr, $ow) = split ' ', $line;
3073                         $pr = unescape($pr);
3074                         $ow = unescape($ow);
3075                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3076                 }
3077                 close $fd;
3078         }
3079 }
3080
3081 sub git_get_project_owner {
3082         my $project = shift;
3083         my $owner;
3084
3085         return undef unless $project;
3086         $git_dir = "$projectroot/$project";
3087
3088         if (!defined $gitweb_project_owner) {
3089                 git_get_project_list_from_file();
3090         }
3091
3092         if (exists $gitweb_project_owner->{$project}) {
3093                 $owner = $gitweb_project_owner->{$project};
3094         }
3095         if (!defined $owner){
3096                 $owner = git_get_project_config('owner');
3097         }
3098         if (!defined $owner) {
3099                 $owner = get_file_owner("$git_dir");
3100         }
3101
3102         return $owner;
3103 }
3104
3105 sub git_get_last_activity {
3106         my ($path) = @_;
3107         my $fd;
3108
3109         $git_dir = "$projectroot/$path";
3110         open($fd, "-|", git_cmd(), 'for-each-ref',
3111              '--format=%(committer)',
3112              '--sort=-committerdate',
3113              '--count=1',
3114              'refs/heads') or return;
3115         my $most_recent = <$fd>;
3116         close $fd or return;
3117         if (defined $most_recent &&
3118             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3119                 my $timestamp = $1;
3120                 my $age = time - $timestamp;
3121                 return ($age, age_string($age));
3122         }
3123         return (undef, undef);
3124 }
3125
3126 # Implementation note: when a single remote is wanted, we cannot use 'git
3127 # remote show -n' because that command always work (assuming it's a remote URL
3128 # if it's not defined), and we cannot use 'git remote show' because that would
3129 # try to make a network roundtrip. So the only way to find if that particular
3130 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3131 # and when we find what we want.
3132 sub git_get_remotes_list {
3133         my $wanted = shift;
3134         my %remotes = ();
3135
3136         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3137         return unless $fd;
3138         while (my $remote = <$fd>) {
3139                 chomp $remote;
3140                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3141                 next if $wanted and not $remote eq $wanted;
3142                 my ($url, $key) = ($1, $2);
3143
3144                 $remotes{$remote} ||= { 'heads' => () };
3145                 $remotes{$remote}{$key} = $url;
3146         }
3147         close $fd or return;
3148         return wantarray ? %remotes : \%remotes;
3149 }
3150
3151 # Takes a hash of remotes as first parameter and fills it by adding the
3152 # available remote heads for each of the indicated remotes.
3153 sub fill_remote_heads {
3154         my $remotes = shift;
3155         my @heads = map { "remotes/$_" } keys %$remotes;
3156         my @remoteheads = git_get_heads_list(undef, @heads);
3157         foreach my $remote (keys %$remotes) {
3158                 $remotes->{$remote}{'heads'} = [ grep {
3159                         $_->{'name'} =~ s!^$remote/!!
3160                         } @remoteheads ];
3161         }
3162 }
3163
3164 sub git_get_references {
3165         my $type = shift || "";
3166         my %refs;
3167         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3168         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3169         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3170                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3171                 or return;
3172
3173         while (my $line = <$fd>) {
3174                 chomp $line;
3175                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3176                         if (defined $refs{$1}) {
3177                                 push @{$refs{$1}}, $2;
3178                         } else {
3179                                 $refs{$1} = [ $2 ];
3180                         }
3181                 }
3182         }
3183         close $fd or return;
3184         return \%refs;
3185 }
3186
3187 sub git_get_rev_name_tags {
3188         my $hash = shift || return undef;
3189
3190         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3191                 or return;
3192         my $name_rev = <$fd>;
3193         close $fd;
3194
3195         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3196                 return $1;
3197         } else {
3198                 # catches also '$hash undefined' output
3199                 return undef;
3200         }
3201 }
3202
3203 ## ----------------------------------------------------------------------
3204 ## parse to hash functions
3205
3206 sub parse_date {
3207         my $epoch = shift;
3208         my $tz = shift || "-0000";
3209
3210         my %date;
3211         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3212         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3213         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3214         $date{'hour'} = $hour;
3215         $date{'minute'} = $min;
3216         $date{'mday'} = $mday;
3217         $date{'day'} = $days[$wday];
3218         $date{'month'} = $months[$mon];
3219         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3220                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3221         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3222                              $mday, $months[$mon], $hour ,$min;
3223         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3224                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3225
3226         my ($tz_sign, $tz_hour, $tz_min) =
3227                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3228         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3229         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3230         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3231         $date{'hour_local'} = $hour;
3232         $date{'minute_local'} = $min;
3233         $date{'tz_local'} = $tz;
3234         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3235                                   1900+$year, $mon+1, $mday,
3236                                   $hour, $min, $sec, $tz);
3237         return %date;
3238 }
3239
3240 sub parse_tag {
3241         my $tag_id = shift;
3242         my %tag;
3243         my @comment;
3244
3245         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3246         $tag{'id'} = $tag_id;
3247         while (my $line = <$fd>) {
3248                 chomp $line;
3249                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3250                         $tag{'object'} = $1;
3251                 } elsif ($line =~ m/^type (.+)$/) {
3252                         $tag{'type'} = $1;
3253                 } elsif ($line =~ m/^tag (.+)$/) {
3254                         $tag{'name'} = $1;
3255                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3256                         $tag{'author'} = $1;
3257                         $tag{'author_epoch'} = $2;
3258                         $tag{'author_tz'} = $3;
3259                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3260                                 $tag{'author_name'}  = $1;
3261                                 $tag{'author_email'} = $2;
3262                         } else {
3263                                 $tag{'author_name'} = $tag{'author'};
3264                         }
3265                 } elsif ($line =~ m/--BEGIN/) {
3266                         push @comment, $line;
3267                         last;
3268                 } elsif ($line eq "") {
3269                         last;
3270                 }
3271         }
3272         push @comment, <$fd>;
3273         $tag{'comment'} = \@comment;
3274         close $fd or return;
3275         if (!defined $tag{'name'}) {
3276                 return
3277         };
3278         return %tag
3279 }
3280
3281 sub parse_commit_text {
3282         my ($commit_text, $withparents) = @_;
3283         my @commit_lines = split '\n', $commit_text;
3284         my %co;
3285
3286         pop @commit_lines; # Remove '\0'
3287
3288         if (! @commit_lines) {
3289                 return;
3290         }
3291
3292         my $header = shift @commit_lines;
3293         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3294                 return;
3295         }
3296         ($co{'id'}, my @parents) = split ' ', $header;
3297         while (my $line = shift @commit_lines) {
3298                 last if $line eq "\n";
3299                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3300                         $co{'tree'} = $1;
3301                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3302                         push @parents, $1;
3303                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3304                         $co{'author'} = to_utf8($1);
3305                         $co{'author_epoch'} = $2;
3306                         $co{'author_tz'} = $3;
3307                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3308                                 $co{'author_name'}  = $1;
3309                                 $co{'author_email'} = $2;
3310                         } else {
3311                                 $co{'author_name'} = $co{'author'};
3312                         }
3313                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3314                         $co{'committer'} = to_utf8($1);
3315                         $co{'committer_epoch'} = $2;
3316                         $co{'committer_tz'} = $3;
3317                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3318                                 $co{'committer_name'}  = $1;
3319                                 $co{'committer_email'} = $2;
3320                         } else {
3321                                 $co{'committer_name'} = $co{'committer'};
3322                         }
3323                 }
3324         }
3325         if (!defined $co{'tree'}) {
3326                 return;
3327         };
3328         $co{'parents'} = \@parents;
3329         $co{'parent'} = $parents[0];
3330
3331         foreach my $title (@commit_lines) {
3332                 $title =~ s/^    //;
3333                 if ($title ne "") {
3334                         $co{'title'} = chop_str($title, 80, 5);
3335                         # remove leading stuff of merges to make the interesting part visible
3336                         if (length($title) > 50) {
3337                                 $title =~ s/^Automatic //;
3338                                 $title =~ s/^merge (of|with) /Merge ... /i;
3339                                 if (length($title) > 50) {
3340                                         $title =~ s/(http|rsync):\/\///;
3341                                 }
3342                                 if (length($title) > 50) {
3343                                         $title =~ s/(master|www|rsync)\.//;
3344                                 }
3345                                 if (length($title) > 50) {
3346                                         $title =~ s/kernel.org:?//;
3347                                 }
3348                                 if (length($title) > 50) {
3349                                         $title =~ s/\/pub\/scm//;
3350                                 }
3351                         }
3352                         $co{'title_short'} = chop_str($title, 50, 5);
3353                         last;
3354                 }
3355         }
3356         if (! defined $co{'title'} || $co{'title'} eq "") {
3357                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3358         }
3359         # remove added spaces
3360         foreach my $line (@commit_lines) {
3361                 $line =~ s/^    //;
3362         }
3363         $co{'comment'} = \@commit_lines;
3364
3365         my $age = time - $co{'committer_epoch'};
3366         $co{'age'} = $age;
3367         $co{'age_string'} = age_string($age);
3368         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3369         if ($age > 60*60*24*7*2) {
3370                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3371                 $co{'age_string_age'} = $co{'age_string'};
3372         } else {
3373                 $co{'age_string_date'} = $co{'age_string'};
3374                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3375         }
3376         return %co;
3377 }
3378
3379 sub parse_commit {
3380         my ($commit_id) = @_;
3381         my %co;
3382
3383         local $/ = "\0";
3384
3385         open my $fd, "-|", git_cmd(), "rev-list",
3386                 "--parents",
3387                 "--header",
3388                 "--max-count=1",
3389                 $commit_id,
3390                 "--",
3391                 or die_error(500, "Open git-rev-list failed");
3392         %co = parse_commit_text(<$fd>, 1);
3393         close $fd;
3394
3395         return %co;
3396 }
3397
3398 sub parse_commits {
3399         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3400         my @cos;
3401
3402         $maxcount ||= 1;
3403         $skip ||= 0;
3404
3405         local $/ = "\0";
3406
3407         open my $fd, "-|", git_cmd(), "rev-list",
3408                 "--header",
3409                 @args,
3410                 ("--max-count=" . $maxcount),
3411                 ("--skip=" . $skip),
3412                 @extra_options,
3413                 $commit_id,
3414                 "--",
3415                 ($filename ? ($filename) : ())
3416                 or die_error(500, "Open git-rev-list failed");
3417         while (my $line = <$fd>) {
3418                 my %co = parse_commit_text($line);
3419                 push @cos, \%co;
3420         }
3421         close $fd;
3422
3423         return wantarray ? @cos : \@cos;
3424 }
3425
3426 # parse line of git-diff-tree "raw" output
3427 sub parse_difftree_raw_line {
3428         my $line = shift;
3429         my %res;
3430
3431         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3432         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3433         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3434                 $res{'from_mode'} = $1;
3435                 $res{'to_mode'} = $2;
3436                 $res{'from_id'} = $3;
3437                 $res{'to_id'} = $4;
3438                 $res{'status'} = $5;
3439                 $res{'similarity'} = $6;
3440                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3441                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3442                 } else {
3443                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3444                 }
3445         }
3446         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3447         # combined diff (for merge commit)
3448         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3449                 $res{'nparents'}  = length($1);
3450                 $res{'from_mode'} = [ split(' ', $2) ];
3451                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3452                 $res{'from_id'} = [ split(' ', $3) ];
3453                 $res{'to_id'} = pop @{$res{'from_id'}};
3454                 $res{'status'} = [ split('', $4) ];
3455                 $res{'to_file'} = unquote($5);
3456         }
3457         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3458         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3459                 $res{'commit'} = $1;
3460         }
3461
3462         return wantarray ? %res : \%res;
3463 }
3464
3465 # wrapper: return parsed line of git-diff-tree "raw" output
3466 # (the argument might be raw line, or parsed info)
3467 sub parsed_difftree_line {
3468         my $line_or_ref = shift;
3469
3470         if (ref($line_or_ref) eq "HASH") {
3471                 # pre-parsed (or generated by hand)
3472                 return $line_or_ref;
3473         } else {
3474                 return parse_difftree_raw_line($line_or_ref);
3475         }
3476 }
3477
3478 # parse line of git-ls-tree output
3479 sub parse_ls_tree_line {
3480         my $line = shift;
3481         my %opts = @_;
3482         my %res;
3483
3484         if ($opts{'-l'}) {
3485                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3486                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3487
3488                 $res{'mode'} = $1;
3489                 $res{'type'} = $2;
3490                 $res{'hash'} = $3;
3491                 $res{'size'} = $4;
3492                 if ($opts{'-z'}) {
3493                         $res{'name'} = $5;
3494                 } else {
3495                         $res{'name'} = unquote($5);
3496                 }
3497         } else {
3498                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3499                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3500
3501                 $res{'mode'} = $1;
3502                 $res{'type'} = $2;
3503                 $res{'hash'} = $3;
3504                 if ($opts{'-z'}) {
3505                         $res{'name'} = $4;
3506                 } else {
3507                         $res{'name'} = unquote($4);
3508                 }
3509         }
3510
3511         return wantarray ? %res : \%res;
3512 }
3513
3514 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3515 sub parse_from_to_diffinfo {
3516         my ($diffinfo, $from, $to, @parents) = @_;
3517
3518         if ($diffinfo->{'nparents'}) {
3519                 # combined diff
3520                 $from->{'file'} = [];
3521                 $from->{'href'} = [];
3522                 fill_from_file_info($diffinfo, @parents)
3523                         unless exists $diffinfo->{'from_file'};
3524                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3525                         $from->{'file'}[$i] =
3526                                 defined $diffinfo->{'from_file'}[$i] ?
3527                                         $diffinfo->{'from_file'}[$i] :
3528                                         $diffinfo->{'to_file'};
3529                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3530                                 $from->{'href'}[$i] = href(action=>"blob",
3531                                                            hash_base=>$parents[$i],
3532                                                            hash=>$diffinfo->{'from_id'}[$i],
3533                                                            file_name=>$from->{'file'}[$i]);
3534                         } else {
3535                                 $from->{'href'}[$i] = undef;
3536                         }
3537                 }
3538         } else {
3539                 # ordinary (not combined) diff
3540                 $from->{'file'} = $diffinfo->{'from_file'};
3541                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3542                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3543                                                hash=>$diffinfo->{'from_id'},
3544                                                file_name=>$from->{'file'});
3545                 } else {
3546                         delete $from->{'href'};
3547                 }
3548         }
3549
3550         $to->{'file'} = $diffinfo->{'to_file'};
3551         if (!is_deleted($diffinfo)) { # file exists in result
3552                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3553                                      hash=>$diffinfo->{'to_id'},
3554                                      file_name=>$to->{'file'});
3555         } else {
3556                 delete $to->{'href'};
3557         }
3558 }
3559
3560 ## ......................................................................
3561 ## parse to array of hashes functions
3562
3563 sub git_get_heads_list {
3564         my ($limit, @classes) = @_;
3565         @classes = ('heads') unless @classes;
3566         my @patterns = map { "refs/$_" } @classes;
3567         my @headslist;
3568
3569         open my $fd, '-|', git_cmd(), 'for-each-ref',
3570                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3571                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3572                 @patterns
3573                 or return;
3574         while (my $line = <$fd>) {
3575                 my %ref_item;
3576
3577                 chomp $line;
3578                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3579                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3580                 my ($committer, $epoch, $tz) =
3581                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3582                 $ref_item{'fullname'}  = $name;
3583                 $name =~ s!^refs/(?:head|remote)s/!!;
3584
3585                 $ref_item{'name'}  = $name;
3586                 $ref_item{'id'}    = $hash;
3587                 $ref_item{'title'} = $title || '(no commit message)';
3588                 $ref_item{'epoch'} = $epoch;
3589                 if ($epoch) {
3590                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3591                 } else {
3592                         $ref_item{'age'} = "unknown";
3593                 }
3594
3595                 push @headslist, \%ref_item;
3596         }
3597         close $fd;
3598
3599         return wantarray ? @headslist : \@headslist;
3600 }
3601
3602 sub git_get_tags_list {
3603         my $limit = shift;
3604         my @tagslist;
3605
3606         open my $fd, '-|', git_cmd(), 'for-each-ref',
3607                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3608                 '--format=%(objectname) %(objecttype) %(refname) '.
3609                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3610                 'refs/tags'
3611                 or return;
3612         while (my $line = <$fd>) {
3613                 my %ref_item;
3614
3615                 chomp $line;
3616                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3617                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3618                 my ($creator, $epoch, $tz) =
3619                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3620                 $ref_item{'fullname'} = $name;
3621                 $name =~ s!^refs/tags/!!;
3622
3623                 $ref_item{'type'} = $type;
3624                 $ref_item{'id'} = $id;
3625                 $ref_item{'name'} = $name;
3626                 if ($type eq "tag") {
3627                         $ref_item{'subject'} = $title;
3628                         $ref_item{'reftype'} = $reftype;
3629                         $ref_item{'refid'}   = $refid;
3630                 } else {
3631                         $ref_item{'reftype'} = $type;
3632                         $ref_item{'refid'}   = $id;
3633                 }
3634
3635                 if ($type eq "tag" || $type eq "commit") {
3636                         $ref_item{'epoch'} = $epoch;
3637                         if ($epoch) {
3638                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3639                         } else {
3640                                 $ref_item{'age'} = "unknown";
3641                         }
3642                 }
3643
3644                 push @tagslist, \%ref_item;
3645         }
3646         close $fd;
3647
3648         return wantarray ? @tagslist : \@tagslist;
3649 }
3650
3651 ## ----------------------------------------------------------------------
3652 ## filesystem-related functions
3653
3654 sub get_file_owner {
3655         my $path = shift;
3656
3657         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3658         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3659         if (!defined $gcos) {
3660                 return undef;
3661         }
3662         my $owner = $gcos;
3663         $owner =~ s/[,;].*$//;
3664         return to_utf8($owner);
3665 }
3666
3667 # assume that file exists
3668 sub insert_file {
3669         my $filename = shift;
3670
3671         open my $fd, '<', $filename;
3672         print map { to_utf8($_) } <$fd>;
3673         close $fd;
3674 }
3675
3676 ## ......................................................................
3677 ## mimetype related functions
3678
3679 sub mimetype_guess_file {
3680         my $filename = shift;
3681         my $mimemap = shift;
3682         -r $mimemap or return undef;
3683
3684         my %mimemap;
3685         open(my $mh, '<', $mimemap) or return undef;
3686         while (<$mh>) {
3687                 next if m/^#/; # skip comments
3688                 my ($mimetype, @exts) = split(/\s+/);
3689                 foreach my $ext (@exts) {
3690                         $mimemap{$ext} = $mimetype;
3691                 }
3692         }
3693         close($mh);
3694
3695         $filename =~ /\.([^.]*)$/;
3696         return $mimemap{$1};
3697 }
3698
3699 sub mimetype_guess {
3700         my $filename = shift;
3701         my $mime;
3702         $filename =~ /\./ or return undef;
3703
3704         if ($mimetypes_file) {
3705                 my $file = $mimetypes_file;
3706                 if ($file !~ m!^/!) { # if it is relative path
3707                         # it is relative to project
3708                         $file = "$projectroot/$project/$file";
3709                 }
3710                 $mime = mimetype_guess_file($filename, $file);
3711         }
3712         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3713         return $mime;
3714 }
3715
3716 sub blob_mimetype {
3717         my $fd = shift;
3718         my $filename = shift;
3719
3720         if ($filename) {
3721                 my $mime = mimetype_guess($filename);
3722                 $mime and return $mime;
3723         }
3724
3725         # just in case
3726         return $default_blob_plain_mimetype unless $fd;
3727
3728         if (-T $fd) {
3729                 return 'text/plain';
3730         } elsif (! $filename) {
3731                 return 'application/octet-stream';
3732         } elsif ($filename =~ m/\.png$/i) {
3733                 return 'image/png';
3734         } elsif ($filename =~ m/\.gif$/i) {
3735                 return 'image/gif';
3736         } elsif ($filename =~ m/\.jpe?g$/i) {
3737                 return 'image/jpeg';
3738         } else {
3739                 return 'application/octet-stream';
3740         }
3741 }
3742
3743 sub blob_contenttype {
3744         my ($fd, $file_name, $type) = @_;
3745
3746         $type ||= blob_mimetype($fd, $file_name);
3747         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3748                 $type .= "; charset=$default_text_plain_charset";
3749         }
3750
3751         return $type;
3752 }
3753
3754 # guess file syntax for syntax highlighting; return undef if no highlighting
3755 # the name of syntax can (in the future) depend on syntax highlighter used
3756 sub guess_file_syntax {
3757         my ($highlight, $mimetype, $file_name) = @_;
3758         return undef unless ($highlight && defined $file_name);
3759         my $basename = basename($file_name, '.in');
3760         return $highlight_basename{$basename}
3761                 if exists $highlight_basename{$basename};
3762
3763         $basename =~ /\.([^.]*)$/;
3764         my $ext = $1 or return undef;
3765         return $highlight_ext{$ext}
3766                 if exists $highlight_ext{$ext};
3767
3768         return undef;
3769 }
3770
3771 # run highlighter and return FD of its output,
3772 # or return original FD if no highlighting
3773 sub run_highlighter {
3774         my ($fd, $highlight, $syntax) = @_;
3775         return $fd unless ($highlight && defined $syntax);
3776
3777         close $fd;
3778         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3779                   quote_command($highlight_bin).
3780                   " --replace-tabs=8 --fragment --syntax $syntax |"
3781                 or die_error(500, "Couldn't open file or run syntax highlighter");
3782         return $fd;
3783 }
3784
3785 ## ======================================================================
3786 ## functions printing HTML: header, footer, error page
3787
3788 sub get_page_title {
3789         my $title = to_utf8($site_name);
3790
3791         unless (defined $project) {
3792                 if (defined $project_filter) {
3793                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3794                 }
3795                 return $title;
3796         }
3797         $title .= " - " . to_utf8($project);
3798
3799         return $title unless (defined $action);
3800         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3801
3802         return $title unless (defined $file_name);
3803         $title .= " - " . esc_path($file_name);
3804         if ($action eq "tree" && $file_name !~ m|/$|) {
3805                 $title .= "/";
3806         }
3807
3808         return $title;
3809 }
3810
3811 sub get_content_type_html {
3812         # require explicit support from the UA if we are to send the page as
3813         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3814         # we have to do this because MSIE sometimes globs '*/*', pretending to
3815         # support xhtml+xml but choking when it gets what it asked for.
3816         if (defined $cgi->http('HTTP_ACCEPT') &&
3817             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3818             $cgi->Accept('application/xhtml+xml') != 0) {
3819                 return 'application/xhtml+xml';
3820         } else {
3821                 return 'text/html';
3822         }
3823 }
3824
3825 sub print_feed_meta {
3826         if (defined $project) {
3827                 my %href_params = get_feed_info();
3828                 if (!exists $href_params{'-title'}) {
3829                         $href_params{'-title'} = 'log';
3830                 }
3831
3832                 foreach my $format (qw(RSS Atom)) {
3833                         my $type = lc($format);
3834                         my %link_attr = (
3835                                 '-rel' => 'alternate',
3836                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3837                                 '-type' => "application/$type+xml"
3838                         );
3839
3840                         $href_params{'action'} = $type;
3841                         $link_attr{'-href'} = href(%href_params);
3842                         print "<link ".
3843                               "rel=\"$link_attr{'-rel'}\" ".
3844                               "title=\"$link_attr{'-title'}\" ".
3845                               "href=\"$link_attr{'-href'}\" ".
3846                               "type=\"$link_attr{'-type'}\" ".
3847                               "/>\n";
3848
3849                         $href_params{'extra_options'} = '--no-merges';
3850                         $link_attr{'-href'} = href(%href_params);
3851                         $link_attr{'-title'} .= ' (no merges)';
3852                         print "<link ".
3853                               "rel=\"$link_attr{'-rel'}\" ".
3854                               "title=\"$link_attr{'-title'}\" ".
3855                               "href=\"$link_attr{'-href'}\" ".
3856                               "type=\"$link_attr{'-type'}\" ".
3857                               "/>\n";
3858                 }
3859
3860         } else {
3861                 printf('<link rel="alternate" title="%s projects list" '.
3862                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3863                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3864                 printf('<link rel="alternate" title="%s projects feeds" '.
3865                        'href="%s" type="text/x-opml" />'."\n",
3866                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3867         }
3868 }
3869
3870 sub print_header_links {
3871         my $status = shift;
3872
3873         # print out each stylesheet that exist, providing backwards capability
3874         # for those people who defined $stylesheet in a config file
3875         if (defined $stylesheet) {
3876                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3877         } else {
3878                 foreach my $stylesheet (@stylesheets) {
3879                         next unless $stylesheet;
3880                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3881                 }
3882         }
3883         print_feed_meta()
3884                 if ($status eq '200 OK');
3885         if (defined $favicon) {
3886                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3887         }
3888 }
3889
3890 sub print_nav_breadcrumbs_path {
3891         my $dirprefix = undef;
3892         while (my $part = shift) {
3893                 $dirprefix .= "/" if defined $dirprefix;
3894                 $dirprefix .= $part;
3895                 print $cgi->a({-href => href(project => undef,
3896                                              project_filter => $dirprefix,
3897                                              action => "project_list")},
3898                               esc_html($part)) . " / ";
3899         }
3900 }
3901
3902 sub print_nav_breadcrumbs {
3903         my %opts = @_;
3904
3905         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3906         if (defined $project) {
3907                 my @dirname = split '/', $project;
3908                 my $projectbasename = pop @dirname;
3909                 print_nav_breadcrumbs_path(@dirname);
3910                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3911                 if (defined $action) {
3912                         my $action_print = $action ;
3913                         if (defined $opts{-action_extra}) {
3914                                 $action_print = $cgi->a({-href => href(action=>$action)},
3915                                         $action);
3916                         }
3917                         print " / $action_print";
3918                 }
3919                 if (defined $opts{-action_extra}) {
3920                         print " / $opts{-action_extra}";
3921                 }
3922                 print "\n";
3923         } elsif (defined $project_filter) {
3924                 print_nav_breadcrumbs_path(split '/', $project_filter);
3925         }
3926 }
3927
3928 sub print_search_form {
3929         if (!defined $searchtext) {
3930                 $searchtext = "";
3931         }
3932         my $search_hash;
3933         if (defined $hash_base) {
3934                 $search_hash = $hash_base;
3935         } elsif (defined $hash) {
3936                 $search_hash = $hash;
3937         } else {
3938                 $search_hash = "HEAD";
3939         }
3940         my $action = $my_uri;
3941         my $use_pathinfo = gitweb_check_feature('pathinfo');
3942         if ($use_pathinfo) {
3943                 $action .= "/".esc_url($project);
3944         }
3945         print $cgi->startform(-method => "get", -action => $action) .
3946               "<div class=\"search\">\n" .
3947               (!$use_pathinfo &&
3948               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3949               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3950               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3951               $cgi->popup_menu(-name => 'st', -default => 'commit',
3952                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3953               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3954               " search:\n",
3955               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3956               "<span title=\"Extended regular expression\">" .
3957               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3958                              -checked => $search_use_regexp) .
3959               "</span>" .
3960               "</div>" .
3961               $cgi->end_form() . "\n";
3962 }
3963
3964 sub git_header_html {
3965         my $status = shift || "200 OK";
3966         my $expires = shift;
3967         my %opts = @_;
3968
3969         my $title = get_page_title();
3970         my $content_type = get_content_type_html();
3971         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3972                            -status=> $status, -expires => $expires)
3973                 unless ($opts{'-no_http_header'});
3974         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3975         print <<EOF;
3976 <?xml version="1.0" encoding="utf-8"?>
3977 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3978 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3979 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3980 <!-- git core binaries version $git_version -->
3981 <head>
3982 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3983 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3984 <meta name="robots" content="index, nofollow"/>
3985 <title>$title</title>
3986 EOF
3987         # the stylesheet, favicon etc urls won't work correctly with path_info
3988         # unless we set the appropriate base URL
3989         if ($ENV{'PATH_INFO'}) {
3990                 print "<base href=\"".esc_url($base_url)."\" />\n";
3991         }
3992         print_header_links($status);
3993
3994         if (defined $site_html_head_string) {
3995                 print to_utf8($site_html_head_string);
3996         }
3997
3998         print "</head>\n" .
3999               "<body>\n";
4000
4001         if (defined $site_header && -f $site_header) {
4002                 insert_file($site_header);
4003         }
4004
4005         print "<div class=\"page_header\">\n";
4006         if (defined $logo) {
4007                 print $cgi->a({-href => esc_url($logo_url),
4008                                -title => $logo_label},
4009                               $cgi->img({-src => esc_url($logo),
4010                                          -width => 72, -height => 27,
4011                                          -alt => "git",
4012                                          -class => "logo"}));
4013         }
4014         print_nav_breadcrumbs(%opts);
4015         print "</div>\n";
4016
4017         my $have_search = gitweb_check_feature('search');
4018         if (defined $project && $have_search) {
4019                 print_search_form();
4020         }
4021 }
4022
4023 sub git_footer_html {
4024         my $feed_class = 'rss_logo';
4025
4026         print "<div class=\"page_footer\">\n";
4027         if (defined $project) {
4028                 my $descr = git_get_project_description($project);
4029                 if (defined $descr) {
4030                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4031                 }
4032
4033                 my %href_params = get_feed_info();
4034                 if (!%href_params) {
4035                         $feed_class .= ' generic';
4036                 }
4037                 $href_params{'-title'} ||= 'log';
4038
4039                 foreach my $format (qw(RSS Atom)) {
4040                         $href_params{'action'} = lc($format);
4041                         print $cgi->a({-href => href(%href_params),
4042                                       -title => "$href_params{'-title'} $format feed",
4043                                       -class => $feed_class}, $format)."\n";
4044                 }
4045
4046         } else {
4047                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4048                                              project_filter => $project_filter),
4049                               -class => $feed_class}, "OPML") . " ";
4050                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4051                                              project_filter => $project_filter),
4052                               -class => $feed_class}, "TXT") . "\n";
4053         }
4054         print "</div>\n"; # class="page_footer"
4055
4056         if (defined $t0 && gitweb_check_feature('timed')) {
4057                 print "<div id=\"generating_info\">\n";
4058                 print 'This page took '.
4059                       '<span id="generating_time" class="time_span">'.
4060                       tv_interval($t0, [ gettimeofday() ]).
4061                       ' seconds </span>'.
4062                       ' and '.
4063                       '<span id="generating_cmd">'.
4064                       $number_of_git_cmds.
4065                       '</span> git commands '.
4066                       " to generate.\n";
4067                 print "</div>\n"; # class="page_footer"
4068         }
4069
4070         if (defined $site_footer && -f $site_footer) {
4071                 insert_file($site_footer);
4072         }
4073
4074         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4075         if (defined $action &&
4076             $action eq 'blame_incremental') {
4077                 print qq!<script type="text/javascript">\n!.
4078                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4079                       qq!           "!. href() .qq!");\n!.
4080                       qq!</script>\n!;
4081         } else {
4082                 my ($jstimezone, $tz_cookie, $datetime_class) =
4083                         gitweb_get_feature('javascript-timezone');
4084
4085                 print qq!<script type="text/javascript">\n!.
4086                       qq!window.onload = function () {\n!;
4087                 if (gitweb_check_feature('javascript-actions')) {
4088                         print qq!       fixLinks();\n!;
4089                 }
4090                 if ($jstimezone && $tz_cookie && $datetime_class) {
4091                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4092                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4093                 }
4094                 print qq!};\n!.
4095                       qq!</script>\n!;
4096         }
4097
4098         print "</body>\n" .
4099               "</html>";
4100 }
4101
4102 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4103 # Example: die_error(404, 'Hash not found')
4104 # By convention, use the following status codes (as defined in RFC 2616):
4105 # 400: Invalid or missing CGI parameters, or
4106 #      requested object exists but has wrong type.
4107 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4108 #      this server or project.
4109 # 404: Requested object/revision/project doesn't exist.
4110 # 500: The server isn't configured properly, or
4111 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4112 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4113 # 503: The server is currently unavailable (because it is overloaded,
4114 #      or down for maintenance).  Generally, this is a temporary state.
4115 sub die_error {
4116         my $status = shift || 500;
4117         my $error = esc_html(shift) || "Internal Server Error";
4118         my $extra = shift;
4119         my %opts = @_;
4120
4121         my %http_responses = (
4122                 400 => '400 Bad Request',
4123                 403 => '403 Forbidden',
4124                 404 => '404 Not Found',
4125                 500 => '500 Internal Server Error',
4126                 503 => '503 Service Unavailable',
4127         );
4128         git_header_html($http_responses{$status}, undef, %opts);
4129         print <<EOF;
4130 <div class="page_body">
4131 <br /><br />
4132 $status - $error
4133 <br />
4134 EOF
4135         if (defined $extra) {
4136                 print "<hr />\n" .
4137                       "$extra\n";
4138         }
4139         print "</div>\n";
4140
4141         git_footer_html();
4142         goto DONE_GITWEB
4143                 unless ($opts{'-error_handler'});
4144 }
4145
4146 ## ----------------------------------------------------------------------
4147 ## functions printing or outputting HTML: navigation
4148
4149 sub git_print_page_nav {
4150         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4151         $extra = '' if !defined $extra; # pager or formats
4152
4153         my @navs = qw(summary shortlog log commit commitdiff tree);
4154         if ($suppress) {
4155                 @navs = grep { $_ ne $suppress } @navs;
4156         }
4157
4158         my %arg = map { $_ => {action=>$_} } @navs;
4159         if (defined $head) {
4160                 for (qw(commit commitdiff)) {
4161                         $arg{$_}{'hash'} = $head;
4162                 }
4163                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4164                         for (qw(shortlog log)) {
4165                                 $arg{$_}{'hash'} = $head;
4166                         }
4167                 }
4168         }
4169
4170         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4171         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4172
4173         my @actions = gitweb_get_feature('actions');
4174         my %repl = (
4175                 '%' => '%',
4176                 'n' => $project,         # project name
4177                 'f' => $git_dir,         # project path within filesystem
4178                 'h' => $treehead || '',  # current hash ('h' parameter)
4179                 'b' => $treebase || '',  # hash base ('hb' parameter)
4180         );
4181         while (@actions) {
4182                 my ($label, $link, $pos) = splice(@actions,0,3);
4183                 # insert
4184                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4185                 # munch munch
4186                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4187                 $arg{$label}{'_href'} = $link;
4188         }
4189
4190         print "<div class=\"page_nav\">\n" .
4191                 (join " | ",
4192                  map { $_ eq $current ?
4193                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4194                  } @navs);
4195         print "<br/>\n$extra<br/>\n" .
4196               "</div>\n";
4197 }
4198
4199 # returns a submenu for the nagivation of the refs views (tags, heads,
4200 # remotes) with the current view disabled and the remotes view only
4201 # available if the feature is enabled
4202 sub format_ref_views {
4203         my ($current) = @_;
4204         my @ref_views = qw{tags heads};
4205         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4206         return join " | ", map {
4207                 $_ eq $current ? $_ :
4208                 $cgi->a({-href => href(action=>$_)}, $_)
4209         } @ref_views
4210 }
4211
4212 sub format_paging_nav {
4213         my ($action, $page, $has_next_link) = @_;
4214         my $paging_nav;
4215
4216
4217         if ($page > 0) {
4218                 $paging_nav .=
4219                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4220                         " &sdot; " .
4221                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4222                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4223         } else {
4224                 $paging_nav .= "first &sdot; prev";
4225         }
4226
4227         if ($has_next_link) {
4228                 $paging_nav .= " &sdot; " .
4229                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4230                                  -accesskey => "n", -title => "Alt-n"}, "next");
4231         } else {
4232                 $paging_nav .= " &sdot; next";
4233         }
4234
4235         return $paging_nav;
4236 }
4237
4238 ## ......................................................................
4239 ## functions printing or outputting HTML: div
4240
4241 sub git_print_header_div {
4242         my ($action, $title, $hash, $hash_base) = @_;
4243         my %args = ();
4244
4245         $args{'action'} = $action;
4246         $args{'hash'} = $hash if $hash;
4247         $args{'hash_base'} = $hash_base if $hash_base;
4248
4249         print "<div class=\"header\">\n" .
4250               $cgi->a({-href => href(%args), -class => "title"},
4251               $title ? $title : $action) .
4252               "\n</div>\n";
4253 }
4254
4255 sub format_repo_url {
4256         my ($name, $url) = @_;
4257         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4258 }
4259
4260 # Group output by placing it in a DIV element and adding a header.
4261 # Options for start_div() can be provided by passing a hash reference as the
4262 # first parameter to the function.
4263 # Options to git_print_header_div() can be provided by passing an array
4264 # reference. This must follow the options to start_div if they are present.
4265 # The content can be a scalar, which is output as-is, a scalar reference, which
4266 # is output after html escaping, an IO handle passed either as *handle or
4267 # *handle{IO}, or a function reference. In the latter case all following
4268 # parameters will be taken as argument to the content function call.
4269 sub git_print_section {
4270         my ($div_args, $header_args, $content);
4271         my $arg = shift;
4272         if (ref($arg) eq 'HASH') {
4273                 $div_args = $arg;
4274                 $arg = shift;
4275         }
4276         if (ref($arg) eq 'ARRAY') {
4277                 $header_args = $arg;
4278                 $arg = shift;
4279         }
4280         $content = $arg;
4281
4282         print $cgi->start_div($div_args);
4283         git_print_header_div(@$header_args);
4284
4285         if (ref($content) eq 'CODE') {
4286                 $content->(@_);
4287         } elsif (ref($content) eq 'SCALAR') {
4288                 print esc_html($$content);
4289         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4290                 print <$content>;
4291         } elsif (!ref($content) && defined($content)) {
4292                 print $content;
4293         }
4294
4295         print $cgi->end_div;
4296 }
4297
4298 sub format_timestamp_html {
4299         my $date = shift;
4300         my $strtime = $date->{'rfc2822'};
4301
4302         my (undef, undef, $datetime_class) =
4303                 gitweb_get_feature('javascript-timezone');
4304         if ($datetime_class) {
4305                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4306         }
4307
4308         my $localtime_format = '(%02d:%02d %s)';
4309         if ($date->{'hour_local'} < 6) {
4310                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4311         }
4312         $strtime .= ' ' .
4313                     sprintf($localtime_format,
4314                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4315
4316         return $strtime;
4317 }
4318
4319 # Outputs the author name and date in long form
4320 sub git_print_authorship {
4321         my $co = shift;
4322         my %opts = @_;
4323         my $tag = $opts{-tag} || 'div';
4324         my $author = $co->{'author_name'};
4325
4326         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4327         print "<$tag class=\"author_date\">" .
4328               format_search_author($author, "author", esc_html($author)) .
4329               " [".format_timestamp_html(\%ad)."]".
4330               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4331               "</$tag>\n";
4332 }
4333
4334 # Outputs table rows containing the full author or committer information,
4335 # in the format expected for 'commit' view (& similar).
4336 # Parameters are a commit hash reference, followed by the list of people
4337 # to output information for. If the list is empty it defaults to both
4338 # author and committer.
4339 sub git_print_authorship_rows {
4340         my $co = shift;
4341         # too bad we can't use @people = @_ || ('author', 'committer')
4342         my @people = @_;
4343         @people = ('author', 'committer') unless @people;
4344         foreach my $who (@people) {
4345                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4346                 print "<tr><td>$who</td><td>" .
4347                       format_search_author($co->{"${who}_name"}, $who,
4348                                            esc_html($co->{"${who}_name"})) . " " .
4349                       format_search_author($co->{"${who}_email"}, $who,
4350                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4351                       "</td><td rowspan=\"2\">" .
4352                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4353                       "</td></tr>\n" .
4354                       "<tr>" .
4355                       "<td></td><td>" .
4356                       format_timestamp_html(\%wd) .
4357                       "</td>" .
4358                       "</tr>\n";
4359         }
4360 }
4361
4362 sub git_print_page_path {
4363         my $name = shift;
4364         my $type = shift;
4365         my $hb = shift;
4366
4367
4368         print "<div class=\"page_path\">";
4369         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4370                       -title => 'tree root'}, to_utf8("[$project]"));
4371         print " / ";
4372         if (defined $name) {
4373                 my @dirname = split '/', $name;
4374                 my $basename = pop @dirname;
4375                 my $fullname = '';
4376
4377                 foreach my $dir (@dirname) {
4378                         $fullname .= ($fullname ? '/' : '') . $dir;
4379                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4380                                                      hash_base=>$hb),
4381                                       -title => $fullname}, esc_path($dir));
4382                         print " / ";
4383                 }
4384                 if (defined $type && $type eq 'blob') {
4385                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4386                                                      hash_base=>$hb),
4387                                       -title => $name}, esc_path($basename));
4388                 } elsif (defined $type && $type eq 'tree') {
4389                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4390                                                      hash_base=>$hb),
4391                                       -title => $name}, esc_path($basename));
4392                         print " / ";
4393                 } else {
4394                         print esc_path($basename);
4395                 }
4396         }
4397         print "<br/></div>\n";
4398 }
4399
4400 sub git_print_log {
4401         my $log = shift;
4402         my %opts = @_;
4403
4404         if ($opts{'-remove_title'}) {
4405                 # remove title, i.e. first line of log
4406                 shift @$log;
4407         }
4408         # remove leading empty lines
4409         while (defined $log->[0] && $log->[0] eq "") {
4410                 shift @$log;
4411         }
4412
4413         # print log
4414         my $signoff = 0;
4415         my $empty = 0;
4416         foreach my $line (@$log) {
4417                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4418                         $signoff = 1;
4419                         $empty = 0;
4420                         if (! $opts{'-remove_signoff'}) {
4421                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4422                                 next;
4423                         } else {
4424                                 # remove signoff lines
4425                                 next;
4426                         }
4427                 } else {
4428                         $signoff = 0;
4429                 }
4430
4431                 # print only one empty line
4432                 # do not print empty line after signoff
4433                 if ($line eq "") {
4434                         next if ($empty || $signoff);
4435                         $empty = 1;
4436                 } else {
4437                         $empty = 0;
4438                 }
4439
4440                 print format_log_line_html($line) . "<br/>\n";
4441         }
4442
4443         if ($opts{'-final_empty_line'}) {
4444                 # end with single empty line
4445                 print "<br/>\n" unless $empty;
4446         }
4447 }
4448
4449 # return link target (what link points to)
4450 sub git_get_link_target {
4451         my $hash = shift;
4452         my $link_target;
4453
4454         # read link
4455         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4456                 or return;
4457         {
4458                 local $/ = undef;
4459                 $link_target = <$fd>;
4460         }
4461         close $fd
4462                 or return;
4463
4464         return $link_target;
4465 }
4466
4467 # given link target, and the directory (basedir) the link is in,
4468 # return target of link relative to top directory (top tree);
4469 # return undef if it is not possible (including absolute links).
4470 sub normalize_link_target {
4471         my ($link_target, $basedir) = @_;
4472
4473         # absolute symlinks (beginning with '/') cannot be normalized
4474         return if (substr($link_target, 0, 1) eq '/');
4475
4476         # normalize link target to path from top (root) tree (dir)
4477         my $path;
4478         if ($basedir) {
4479                 $path = $basedir . '/' . $link_target;
4480         } else {
4481                 # we are in top (root) tree (dir)
4482                 $path = $link_target;
4483         }
4484
4485         # remove //, /./, and /../
4486         my @path_parts;
4487         foreach my $part (split('/', $path)) {
4488                 # discard '.' and ''
4489                 next if (!$part || $part eq '.');
4490                 # handle '..'
4491                 if ($part eq '..') {
4492                         if (@path_parts) {
4493                                 pop @path_parts;
4494                         } else {
4495                                 # link leads outside repository (outside top dir)
4496                                 return;
4497                         }
4498                 } else {
4499                         push @path_parts, $part;
4500                 }
4501         }
4502         $path = join('/', @path_parts);
4503
4504         return $path;
4505 }
4506
4507 # print tree entry (row of git_tree), but without encompassing <tr> element
4508 sub git_print_tree_entry {
4509         my ($t, $basedir, $hash_base, $have_blame) = @_;
4510
4511         my %base_key = ();
4512         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4513
4514         # The format of a table row is: mode list link.  Where mode is
4515         # the mode of the entry, list is the name of the entry, an href,
4516         # and link is the action links of the entry.
4517
4518         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4519         if (exists $t->{'size'}) {
4520                 print "<td class=\"size\">$t->{'size'}</td>\n";
4521         }
4522         if ($t->{'type'} eq "blob") {
4523                 print "<td class=\"list\">" .
4524                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4525                                                file_name=>"$basedir$t->{'name'}", %base_key),
4526                                 -class => "list"}, esc_path($t->{'name'}));
4527                 if (S_ISLNK(oct $t->{'mode'})) {
4528                         my $link_target = git_get_link_target($t->{'hash'});
4529                         if ($link_target) {
4530                                 my $norm_target = normalize_link_target($link_target, $basedir);
4531                                 if (defined $norm_target) {
4532                                         print " -> " .
4533                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4534                                                                      file_name=>$norm_target),
4535                                                        -title => $norm_target}, esc_path($link_target));
4536                                 } else {
4537                                         print " -> " . esc_path($link_target);
4538                                 }
4539                         }
4540                 }
4541                 print "</td>\n";
4542                 print "<td class=\"link\">";
4543                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4544                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4545                               "blob");
4546                 if ($have_blame) {
4547                         print " | " .
4548                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4549                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4550                                       "blame");
4551                 }
4552                 if (defined $hash_base) {
4553                         print " | " .
4554                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4555                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4556                                       "history");
4557                 }
4558                 print " | " .
4559                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4560                                                file_name=>"$basedir$t->{'name'}")},
4561                                 "raw");
4562                 print "</td>\n";
4563
4564         } elsif ($t->{'type'} eq "tree") {
4565                 print "<td class=\"list\">";
4566                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4567                                              file_name=>"$basedir$t->{'name'}",
4568                                              %base_key)},
4569                               esc_path($t->{'name'}));
4570                 print "</td>\n";
4571                 print "<td class=\"link\">";
4572                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4573                                              file_name=>"$basedir$t->{'name'}",
4574                                              %base_key)},
4575                               "tree");
4576                 if (defined $hash_base) {
4577                         print " | " .
4578                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4579                                                      file_name=>"$basedir$t->{'name'}")},
4580                                       "history");
4581                 }
4582                 print "</td>\n";
4583         } else {
4584                 # unknown object: we can only present history for it
4585                 # (this includes 'commit' object, i.e. submodule support)
4586                 print "<td class=\"list\">" .
4587                       esc_path($t->{'name'}) .
4588                       "</td>\n";
4589                 print "<td class=\"link\">";
4590                 if (defined $hash_base) {
4591                         print $cgi->a({-href => href(action=>"history",
4592                                                      hash_base=>$hash_base,
4593                                                      file_name=>"$basedir$t->{'name'}")},
4594                                       "history");
4595                 }
4596                 print "</td>\n";
4597         }
4598 }
4599
4600 ## ......................................................................
4601 ## functions printing large fragments of HTML
4602
4603 # get pre-image filenames for merge (combined) diff
4604 sub fill_from_file_info {
4605         my ($diff, @parents) = @_;
4606
4607         $diff->{'from_file'} = [ ];
4608         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4609         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4610                 if ($diff->{'status'}[$i] eq 'R' ||
4611                     $diff->{'status'}[$i] eq 'C') {
4612                         $diff->{'from_file'}[$i] =
4613                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4614                 }
4615         }
4616
4617         return $diff;
4618 }
4619
4620 # is current raw difftree line of file deletion
4621 sub is_deleted {
4622         my $diffinfo = shift;
4623
4624         return $diffinfo->{'to_id'} eq ('0' x 40);
4625 }
4626
4627 # does patch correspond to [previous] difftree raw line
4628 # $diffinfo  - hashref of parsed raw diff format
4629 # $patchinfo - hashref of parsed patch diff format
4630 #              (the same keys as in $diffinfo)
4631 sub is_patch_split {
4632         my ($diffinfo, $patchinfo) = @_;
4633
4634         return defined $diffinfo && defined $patchinfo
4635                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4636 }
4637
4638
4639 sub git_difftree_body {
4640         my ($difftree, $hash, @parents) = @_;
4641         my ($parent) = $parents[0];
4642         my $have_blame = gitweb_check_feature('blame');
4643         print "<div class=\"list_head\">\n";
4644         if ($#{$difftree} > 10) {
4645                 print(($#{$difftree} + 1) . " files changed:\n");
4646         }
4647         print "</div>\n";
4648
4649         print "<table class=\"" .
4650               (@parents > 1 ? "combined " : "") .
4651               "diff_tree\">\n";
4652
4653         # header only for combined diff in 'commitdiff' view
4654         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4655         if ($has_header) {
4656                 # table header
4657                 print "<thead><tr>\n" .
4658                        "<th></th><th></th>\n"; # filename, patchN link
4659                 for (my $i = 0; $i < @parents; $i++) {
4660                         my $par = $parents[$i];
4661                         print "<th>" .
4662                               $cgi->a({-href => href(action=>"commitdiff",
4663                                                      hash=>$hash, hash_parent=>$par),
4664                                        -title => 'commitdiff to parent number ' .
4665                                                   ($i+1) . ': ' . substr($par,0,7)},
4666                                       $i+1) .
4667                               "&nbsp;</th>\n";
4668                 }
4669                 print "</tr></thead>\n<tbody>\n";
4670         }
4671
4672         my $alternate = 1;
4673         my $patchno = 0;
4674         foreach my $line (@{$difftree}) {
4675                 my $diff = parsed_difftree_line($line);
4676
4677                 if ($alternate) {
4678                         print "<tr class=\"dark\">\n";
4679                 } else {
4680                         print "<tr class=\"light\">\n";
4681                 }
4682                 $alternate ^= 1;
4683
4684                 if (exists $diff->{'nparents'}) { # combined diff
4685
4686                         fill_from_file_info($diff, @parents)
4687                                 unless exists $diff->{'from_file'};
4688
4689                         if (!is_deleted($diff)) {
4690                                 # file exists in the result (child) commit
4691                                 print "<td>" .
4692                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4693                                                              file_name=>$diff->{'to_file'},
4694                                                              hash_base=>$hash),
4695                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4696                                       "</td>\n";
4697                         } else {
4698                                 print "<td>" .
4699                                       esc_path($diff->{'to_file'}) .
4700                                       "</td>\n";
4701                         }
4702
4703                         if ($action eq 'commitdiff') {
4704                                 # link to patch
4705                                 $patchno++;
4706                                 print "<td class=\"link\">" .
4707                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4708                                               "patch") .
4709                                       " | " .
4710                                       "</td>\n";
4711                         }
4712
4713                         my $has_history = 0;
4714                         my $not_deleted = 0;
4715                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4716                                 my $hash_parent = $parents[$i];
4717                                 my $from_hash = $diff->{'from_id'}[$i];
4718                                 my $from_path = $diff->{'from_file'}[$i];
4719                                 my $status = $diff->{'status'}[$i];
4720
4721                                 $has_history ||= ($status ne 'A');
4722                                 $not_deleted ||= ($status ne 'D');
4723
4724                                 if ($status eq 'A') {
4725                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4726                                 } elsif ($status eq 'D') {
4727                                         print "<td class=\"link\">" .
4728                                               $cgi->a({-href => href(action=>"blob",
4729                                                                      hash_base=>$hash,
4730                                                                      hash=>$from_hash,
4731                                                                      file_name=>$from_path)},
4732                                                       "blob" . ($i+1)) .
4733                                               " | </td>\n";
4734                                 } else {
4735                                         if ($diff->{'to_id'} eq $from_hash) {
4736                                                 print "<td class=\"link nochange\">";
4737                                         } else {
4738                                                 print "<td class=\"link\">";
4739                                         }
4740                                         print $cgi->a({-href => href(action=>"blobdiff",
4741                                                                      hash=>$diff->{'to_id'},
4742                                                                      hash_parent=>$from_hash,
4743                                                                      hash_base=>$hash,
4744                                                                      hash_parent_base=>$hash_parent,
4745                                                                      file_name=>$diff->{'to_file'},
4746                                                                      file_parent=>$from_path)},
4747                                                       "diff" . ($i+1)) .
4748                                               " | </td>\n";
4749                                 }
4750                         }
4751
4752                         print "<td class=\"link\">";
4753                         if ($not_deleted) {
4754                                 print $cgi->a({-href => href(action=>"blob",
4755                                                              hash=>$diff->{'to_id'},
4756                                                              file_name=>$diff->{'to_file'},
4757                                                              hash_base=>$hash)},
4758                                               "blob");
4759                                 print " | " if ($has_history);
4760                         }
4761                         if ($has_history) {
4762                                 print $cgi->a({-href => href(action=>"history",
4763                                                              file_name=>$diff->{'to_file'},
4764                                                              hash_base=>$hash)},
4765                                               "history");
4766                         }
4767                         print "</td>\n";
4768
4769                         print "</tr>\n";
4770                         next; # instead of 'else' clause, to avoid extra indent
4771                 }
4772                 # else ordinary diff
4773
4774                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4775                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4776                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4777                         $to_mode_oct = oct $diff->{'to_mode'};
4778                         if (S_ISREG($to_mode_oct)) { # only for regular file
4779                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4780                         }
4781                         $to_file_type = file_type($diff->{'to_mode'});
4782                 }
4783                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4784                         $from_mode_oct = oct $diff->{'from_mode'};
4785                         if (S_ISREG($from_mode_oct)) { # only for regular file
4786                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4787                         }
4788                         $from_file_type = file_type($diff->{'from_mode'});
4789                 }
4790
4791                 if ($diff->{'status'} eq "A") { # created
4792                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4793                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4794                         $mode_chng   .= "]</span>";
4795                         print "<td>";
4796                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4797                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4798                                       -class => "list"}, esc_path($diff->{'file'}));
4799                         print "</td>\n";
4800                         print "<td>$mode_chng</td>\n";
4801                         print "<td class=\"link\">";
4802                         if ($action eq 'commitdiff') {
4803                                 # link to patch
4804                                 $patchno++;
4805                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4806                                               "patch") .
4807                                       " | ";
4808                         }
4809                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4810                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4811                                       "blob");
4812                         print "</td>\n";
4813
4814                 } elsif ($diff->{'status'} eq "D") { # deleted
4815                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4816                         print "<td>";
4817                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4818                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4819                                        -class => "list"}, esc_path($diff->{'file'}));
4820                         print "</td>\n";
4821                         print "<td>$mode_chng</td>\n";
4822                         print "<td class=\"link\">";
4823                         if ($action eq 'commitdiff') {
4824                                 # link to patch
4825                                 $patchno++;
4826                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4827                                               "patch") .
4828                                       " | ";
4829                         }
4830                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4831                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4832                                       "blob") . " | ";
4833                         if ($have_blame) {
4834                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4835                                                              file_name=>$diff->{'file'})},
4836                                               "blame") . " | ";
4837                         }
4838                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4839                                                      file_name=>$diff->{'file'})},
4840                                       "history");
4841                         print "</td>\n";
4842
4843                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4844                         my $mode_chnge = "";
4845                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4846                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4847                                 if ($from_file_type ne $to_file_type) {
4848                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4849                                 }
4850                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4851                                         if ($from_mode_str && $to_mode_str) {
4852                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4853                                         } elsif ($to_mode_str) {
4854                                                 $mode_chnge .= " mode: $to_mode_str";
4855                                         }
4856                                 }
4857                                 $mode_chnge .= "]</span>\n";
4858                         }
4859                         print "<td>";
4860                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4861                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4862                                       -class => "list"}, esc_path($diff->{'file'}));
4863                         print "</td>\n";
4864                         print "<td>$mode_chnge</td>\n";
4865                         print "<td class=\"link\">";
4866                         if ($action eq 'commitdiff') {
4867                                 # link to patch
4868                                 $patchno++;
4869                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4870                                               "patch") .
4871                                       " | ";
4872                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4873                                 # "commit" view and modified file (not onlu mode changed)
4874                                 print $cgi->a({-href => href(action=>"blobdiff",
4875                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4876                                                              hash_base=>$hash, hash_parent_base=>$parent,
4877                                                              file_name=>$diff->{'file'})},
4878                                               "diff") .
4879                                       " | ";
4880                         }
4881                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4882                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4883                                        "blob") . " | ";
4884                         if ($have_blame) {
4885                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4886                                                              file_name=>$diff->{'file'})},
4887                                               "blame") . " | ";
4888                         }
4889                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4890                                                      file_name=>$diff->{'file'})},
4891                                       "history");
4892                         print "</td>\n";
4893
4894                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4895                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4896                         my $nstatus = $status_name{$diff->{'status'}};
4897                         my $mode_chng = "";
4898                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4899                                 # mode also for directories, so we cannot use $to_mode_str
4900                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4901                         }
4902                         print "<td>" .
4903                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4904                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4905                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4906                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4907                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4908                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4909                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4910                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4911                               "<td class=\"link\">";
4912                         if ($action eq 'commitdiff') {
4913                                 # link to patch
4914                                 $patchno++;
4915                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4916                                               "patch") .
4917                                       " | ";
4918                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4919                                 # "commit" view and modified file (not only pure rename or copy)
4920                                 print $cgi->a({-href => href(action=>"blobdiff",
4921                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4922                                                              hash_base=>$hash, hash_parent_base=>$parent,
4923                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4924                                               "diff") .
4925                                       " | ";
4926                         }
4927                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4928                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4929                                       "blob") . " | ";
4930                         if ($have_blame) {
4931                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4932                                                              file_name=>$diff->{'to_file'})},
4933                                               "blame") . " | ";
4934                         }
4935                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4936                                                     file_name=>$diff->{'to_file'})},
4937                                       "history");
4938                         print "</td>\n";
4939
4940                 } # we should not encounter Unmerged (U) or Unknown (X) status
4941                 print "</tr>\n";
4942         }
4943         print "</tbody>" if $has_header;
4944         print "</table>\n";
4945 }
4946
4947 sub print_sidebyside_diff_chunk {
4948         my @chunk = @_;
4949         my (@ctx, @rem, @add);
4950
4951         return unless @chunk;
4952
4953         # incomplete last line might be among removed or added lines,
4954         # or both, or among context lines: find which
4955         for (my $i = 1; $i < @chunk; $i++) {
4956                 if ($chunk[$i][0] eq 'incomplete') {
4957                         $chunk[$i][0] = $chunk[$i-1][0];
4958                 }
4959         }
4960
4961         # guardian
4962         push @chunk, ["", ""];
4963
4964         foreach my $line_info (@chunk) {
4965                 my ($class, $line) = @$line_info;
4966
4967                 # print chunk headers
4968                 if ($class && $class eq 'chunk_header') {
4969                         print $line;
4970                         next;
4971                 }
4972
4973                 ## print from accumulator when type of class of lines change
4974                 # empty contents block on start rem/add block, or end of chunk
4975                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4976                         print join '',
4977                                 '<div class="chunk_block ctx">',
4978                                         '<div class="old">',
4979                                         @ctx,
4980                                         '</div>',
4981                                         '<div class="new">',
4982                                         @ctx,
4983                                         '</div>',
4984                                 '</div>';
4985                         @ctx = ();
4986                 }
4987                 # empty add/rem block on start context block, or end of chunk
4988                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4989                         if (!@add) {
4990                                 # pure removal
4991                                 print join '',
4992                                         '<div class="chunk_block rem">',
4993                                                 '<div class="old">',
4994                                                 @rem,
4995                                                 '</div>',
4996                                         '</div>';
4997                         } elsif (!@rem) {
4998                                 # pure addition
4999                                 print join '',
5000                                         '<div class="chunk_block add">',
5001                                                 '<div class="new">',
5002                                                 @add,
5003                                                 '</div>',
5004                                         '</div>';
5005                         } else {
5006                                 # assume that it is change
5007                                 print join '',
5008                                         '<div class="chunk_block chg">',
5009                                                 '<div class="old">',
5010                                                 @rem,
5011                                                 '</div>',
5012                                                 '<div class="new">',
5013                                                 @add,
5014                                                 '</div>',
5015                                         '</div>';
5016                         }
5017                         @rem = @add = ();
5018                 }
5019
5020                 ## adding lines to accumulator
5021                 # guardian value
5022                 last unless $line;
5023                 # rem, add or change
5024                 if ($class eq 'rem') {
5025                         push @rem, $line;
5026                 } elsif ($class eq 'add') {
5027                         push @add, $line;
5028                 }
5029                 # context line
5030                 if ($class eq 'ctx') {
5031                         push @ctx, $line;
5032                 }
5033         }
5034 }
5035
5036 sub git_patchset_body {
5037         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5038         my ($hash_parent) = $hash_parents[0];
5039
5040         my $is_combined = (@hash_parents > 1);
5041         my $patch_idx = 0;
5042         my $patch_number = 0;
5043         my $patch_line;
5044         my $diffinfo;
5045         my $to_name;
5046         my (%from, %to);
5047         my @chunk; # for side-by-side diff
5048
5049         print "<div class=\"patchset\">\n";
5050
5051         # skip to first patch
5052         while ($patch_line = <$fd>) {
5053                 chomp $patch_line;
5054
5055                 last if ($patch_line =~ m/^diff /);
5056         }
5057
5058  PATCH:
5059         while ($patch_line) {
5060
5061                 # parse "git diff" header line
5062                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5063                         # $1 is from_name, which we do not use
5064                         $to_name = unquote($2);
5065                         $to_name =~ s!^b/!!;
5066                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5067                         # $1 is 'cc' or 'combined', which we do not use
5068                         $to_name = unquote($2);
5069                 } else {
5070                         $to_name = undef;
5071                 }
5072
5073                 # check if current patch belong to current raw line
5074                 # and parse raw git-diff line if needed
5075                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5076                         # this is continuation of a split patch
5077                         print "<div class=\"patch cont\">\n";
5078                 } else {
5079                         # advance raw git-diff output if needed
5080                         $patch_idx++ if defined $diffinfo;
5081
5082                         # read and prepare patch information
5083                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5084
5085                         # compact combined diff output can have some patches skipped
5086                         # find which patch (using pathname of result) we are at now;
5087                         if ($is_combined) {
5088                                 while ($to_name ne $diffinfo->{'to_file'}) {
5089                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5090                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5091                                               "</div>\n";  # class="patch"
5092
5093                                         $patch_idx++;
5094                                         $patch_number++;
5095
5096                                         last if $patch_idx > $#$difftree;
5097                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5098                                 }
5099                         }
5100
5101                         # modifies %from, %to hashes
5102                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5103
5104                         # this is first patch for raw difftree line with $patch_idx index
5105                         # we index @$difftree array from 0, but number patches from 1
5106                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5107                 }
5108
5109                 # git diff header
5110                 #assert($patch_line =~ m/^diff /) if DEBUG;
5111                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5112                 $patch_number++;
5113                 # print "git diff" header
5114                 print format_git_diff_header_line($patch_line, $diffinfo,
5115                                                   \%from, \%to);
5116
5117                 # print extended diff header
5118                 print "<div class=\"diff extended_header\">\n";
5119         EXTENDED_HEADER:
5120                 while ($patch_line = <$fd>) {
5121                         chomp $patch_line;
5122
5123                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5124
5125                         print format_extended_diff_header_line($patch_line, $diffinfo,
5126                                                                \%from, \%to);
5127                 }
5128                 print "</div>\n"; # class="diff extended_header"
5129
5130                 # from-file/to-file diff header
5131                 if (! $patch_line) {
5132                         print "</div>\n"; # class="patch"
5133                         last PATCH;
5134                 }
5135                 next PATCH if ($patch_line =~ m/^diff /);
5136                 #assert($patch_line =~ m/^---/) if DEBUG;
5137
5138                 my $last_patch_line = $patch_line;
5139                 $patch_line = <$fd>;
5140                 chomp $patch_line;
5141                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5142
5143                 print format_diff_from_to_header($last_patch_line, $patch_line,
5144                                                  $diffinfo, \%from, \%to,
5145                                                  @hash_parents);
5146
5147                 # the patch itself
5148         LINE:
5149                 while ($patch_line = <$fd>) {
5150                         chomp $patch_line;
5151
5152                         next PATCH if ($patch_line =~ m/^diff /);
5153
5154                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5155                         my $diff_classes = "diff";
5156                         $diff_classes .= " $class" if ($class);
5157                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5158
5159                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5160                                 if ($class eq 'chunk_header') {
5161                                         print_sidebyside_diff_chunk(@chunk);
5162                                         @chunk = ( [ $class, $line ] );
5163                                 } else {
5164                                         push @chunk, [ $class, $line ];
5165                                 }
5166                         } else {
5167                                 # default 'inline' style and unknown styles
5168                                 print $line;
5169                         }
5170                 }
5171
5172         } continue {
5173                 if (@chunk) {
5174                         print_sidebyside_diff_chunk(@chunk);
5175                         @chunk = ();
5176                 }
5177                 print "</div>\n"; # class="patch"
5178         }
5179
5180         # for compact combined (--cc) format, with chunk and patch simplification
5181         # the patchset might be empty, but there might be unprocessed raw lines
5182         for (++$patch_idx if $patch_number > 0;
5183              $patch_idx < @$difftree;
5184              ++$patch_idx) {
5185                 # read and prepare patch information
5186                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5187
5188                 # generate anchor for "patch" links in difftree / whatchanged part
5189                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5190                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5191                       "</div>\n";  # class="patch"
5192
5193                 $patch_number++;
5194         }
5195
5196         if ($patch_number == 0) {
5197                 if (@hash_parents > 1) {
5198                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5199                 } else {
5200                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5201                 }
5202         }
5203
5204         print "</div>\n"; # class="patchset"
5205 }
5206
5207 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5208
5209 sub git_project_search_form {
5210         my ($searchtext, $search_use_regexp);
5211
5212         my $limit = '';
5213         if ($project_filter) {
5214                 $limit = " in '$project_filter/'";
5215         }
5216
5217         print "<div class=\"projsearch\">\n";
5218         print $cgi->startform(-method => 'get', -action => $my_uri) .
5219               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5220         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5221                 if (defined $project_filter);
5222         print $cgi->textfield(-name => 's', -value => $searchtext,
5223                               -title => "Search project by name and description$limit",
5224                               -size => 60) . "\n" .
5225               "<span title=\"Extended regular expression\">" .
5226               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5227                              -checked => $search_use_regexp) .
5228               "</span>\n" .
5229               $cgi->submit(-name => 'btnS', -value => 'Search') .
5230               $cgi->end_form() . "\n" .
5231               $cgi->a({-href => href(project => undef, searchtext => undef,
5232                                      project_filter => $project_filter)},
5233                       esc_html("List all projects$limit")) . "<br />\n";
5234         print "</div>\n";
5235 }
5236
5237 # entry for given @keys needs filling if at least one of keys in list
5238 # is not present in %$project_info
5239 sub project_info_needs_filling {
5240         my ($project_info, @keys) = @_;
5241
5242         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5243         foreach my $key (@keys) {
5244                 if (!exists $project_info->{$key}) {
5245                         return 1;
5246                 }
5247         }
5248         return;
5249 }
5250
5251 # fills project list info (age, description, owner, category, forks, etc.)
5252 # for each project in the list, removing invalid projects from
5253 # returned list, or fill only specified info.
5254 #
5255 # Invalid projects are removed from the returned list if and only if you
5256 # ask 'age' or 'age_string' to be filled, because they are the only fields
5257 # that run unconditionally git command that requires repository, and
5258 # therefore do always check if project repository is invalid.
5259 #
5260 # USAGE:
5261 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5262 #   ensures that 'descr_long' and 'ctags' fields are filled
5263 # * @project_list = fill_project_list_info(\@project_list)
5264 #   ensures that all fields are filled (and invalid projects removed)
5265 #
5266 # NOTE: modifies $projlist, but does not remove entries from it
5267 sub fill_project_list_info {
5268         my ($projlist, @wanted_keys) = @_;
5269         my @projects;
5270         my $filter_set = sub { return @_; };
5271         if (@wanted_keys) {
5272                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5273                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5274         }
5275
5276         my $show_ctags = gitweb_check_feature('ctags');
5277  PROJECT:
5278         foreach my $pr (@$projlist) {
5279                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5280                         my (@activity) = git_get_last_activity($pr->{'path'});
5281                         unless (@activity) {
5282                                 next PROJECT;
5283                         }
5284                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5285                 }
5286                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5287                         my $descr = git_get_project_description($pr->{'path'}) || "";
5288                         $descr = to_utf8($descr);
5289                         $pr->{'descr_long'} = $descr;
5290                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5291                 }
5292                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5293                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5294                 }
5295                 if ($show_ctags &&
5296                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5297                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5298                 }
5299                 if ($projects_list_group_categories &&
5300                     project_info_needs_filling($pr, $filter_set->('category'))) {
5301                         my $cat = git_get_project_category($pr->{'path'}) ||
5302                                                            $project_list_default_category;
5303                         $pr->{'category'} = to_utf8($cat);
5304                 }
5305
5306                 push @projects, $pr;
5307         }
5308
5309         return @projects;
5310 }
5311
5312 sub sort_projects_list {
5313         my ($projlist, $order) = @_;
5314         my @projects;
5315
5316         my %order_info = (
5317                 project => { key => 'path', type => 'str' },
5318                 descr => { key => 'descr_long', type => 'str' },
5319                 owner => { key => 'owner', type => 'str' },
5320                 age => { key => 'age', type => 'num' }
5321         );
5322         my $oi = $order_info{$order};
5323         return @$projlist unless defined $oi;
5324         if ($oi->{'type'} eq 'str') {
5325                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5326         } else {
5327                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5328         }
5329
5330         return @projects;
5331 }
5332
5333 # returns a hash of categories, containing the list of project
5334 # belonging to each category
5335 sub build_projlist_by_category {
5336         my ($projlist, $from, $to) = @_;
5337         my %categories;
5338
5339         $from = 0 unless defined $from;
5340         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5341
5342         for (my $i = $from; $i <= $to; $i++) {
5343                 my $pr = $projlist->[$i];
5344                 push @{$categories{ $pr->{'category'} }}, $pr;
5345         }
5346
5347         return wantarray ? %categories : \%categories;
5348 }
5349
5350 # print 'sort by' <th> element, generating 'sort by $name' replay link
5351 # if that order is not selected
5352 sub print_sort_th {
5353         print format_sort_th(@_);
5354 }
5355
5356 sub format_sort_th {
5357         my ($name, $order, $header) = @_;
5358         my $sort_th = "";
5359         $header ||= ucfirst($name);
5360
5361         if ($order eq $name) {
5362                 $sort_th .= "<th>$header</th>\n";
5363         } else {
5364                 $sort_th .= "<th>" .
5365                             $cgi->a({-href => href(-replay=>1, order=>$name),
5366                                      -class => "header"}, $header) .
5367                             "</th>\n";
5368         }
5369
5370         return $sort_th;
5371 }
5372
5373 sub git_project_list_rows {
5374         my ($projlist, $from, $to, $check_forks) = @_;
5375
5376         $from = 0 unless defined $from;
5377         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5378
5379         my $alternate = 1;
5380         for (my $i = $from; $i <= $to; $i++) {
5381                 my $pr = $projlist->[$i];
5382
5383                 if ($alternate) {
5384                         print "<tr class=\"dark\">\n";
5385                 } else {
5386                         print "<tr class=\"light\">\n";
5387                 }
5388                 $alternate ^= 1;
5389
5390                 if ($check_forks) {
5391                         print "<td>";
5392                         if ($pr->{'forks'}) {
5393                                 my $nforks = scalar @{$pr->{'forks'}};
5394                                 if ($nforks > 0) {
5395                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5396                                                        -title => "$nforks forks"}, "+");
5397                                 } else {
5398                                         print $cgi->span({-title => "$nforks forks"}, "+");
5399                                 }
5400                         }
5401                         print "</td>\n";
5402                 }
5403                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5404                                         -class => "list"},
5405                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5406                       "</td>\n" .
5407                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5408                                         -class => "list",
5409                                         $search_regexp ? () : -title => $pr->{'descr_long'}},
5410                                         $search_regexp
5411                                         ? esc_html_match_hl($pr->{'descr_long'}, $search_regexp)
5412                                         : esc_html($pr->{'descr'})) .
5413                       "</td>\n" .
5414                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5415                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5416                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5417                       "<td class=\"link\">" .
5418                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5419                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5420                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5421                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5422                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5423                       "</td>\n" .
5424                       "</tr>\n";
5425         }
5426 }
5427
5428 sub git_project_list_body {
5429         # actually uses global variable $project
5430         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5431         my @projects = @$projlist;
5432
5433         my $check_forks = gitweb_check_feature('forks');
5434         my $show_ctags  = gitweb_check_feature('ctags');
5435         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5436         $check_forks = undef
5437                 if ($tagfilter || $searchtext);
5438
5439         # filtering out forks before filling info allows to do less work
5440         @projects = filter_forks_from_projects_list(\@projects)
5441                 if ($check_forks);
5442         # search_projects_list pre-fills required info
5443         @projects = search_projects_list(\@projects,
5444                                          'searchtext' => $searchtext,
5445                                          'tagfilter'  => $tagfilter)
5446                 if ($tagfilter || $searchtext);
5447         # fill the rest
5448         @projects = fill_project_list_info(\@projects);
5449
5450         $order ||= $default_projects_order;
5451         $from = 0 unless defined $from;
5452         $to = $#projects if (!defined $to || $#projects < $to);
5453
5454         # short circuit
5455         if ($from > $to) {
5456                 print "<center>\n".
5457                       "<b>No such projects found</b><br />\n".
5458                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5459                       "</center>\n<br />\n";
5460                 return;
5461         }
5462
5463         @projects = sort_projects_list(\@projects, $order);
5464
5465         if ($show_ctags) {
5466                 my $ctags = git_gather_all_ctags(\@projects);
5467                 my $cloud = git_populate_project_tagcloud($ctags);
5468                 print git_show_project_tagcloud($cloud, 64);
5469         }
5470
5471         print "<table class=\"project_list\">\n";
5472         unless ($no_header) {
5473                 print "<tr>\n";
5474                 if ($check_forks) {
5475                         print "<th></th>\n";
5476                 }
5477                 print_sort_th('project', $order, 'Project');
5478                 print_sort_th('descr', $order, 'Description');
5479                 print_sort_th('owner', $order, 'Owner');
5480                 print_sort_th('age', $order, 'Last Change');
5481                 print "<th></th>\n" . # for links
5482                       "</tr>\n";
5483         }
5484
5485         if ($projects_list_group_categories) {
5486                 # only display categories with projects in the $from-$to window
5487                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5488                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5489                 foreach my $cat (sort keys %categories) {
5490                         unless ($cat eq "") {
5491                                 print "<tr>\n";
5492                                 if ($check_forks) {
5493                                         print "<td></td>\n";
5494                                 }
5495                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5496                                 print "</tr>\n";
5497                         }
5498
5499                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5500                 }
5501         } else {
5502                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5503         }
5504
5505         if (defined $extra) {
5506                 print "<tr>\n";
5507                 if ($check_forks) {
5508                         print "<td></td>\n";
5509                 }
5510                 print "<td colspan=\"5\">$extra</td>\n" .
5511                       "</tr>\n";
5512         }
5513         print "</table>\n";
5514 }
5515
5516 sub git_log_body {
5517         # uses global variable $project
5518         my ($commitlist, $from, $to, $refs, $extra) = @_;
5519
5520         $from = 0 unless defined $from;
5521         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5522
5523         for (my $i = 0; $i <= $to; $i++) {
5524                 my %co = %{$commitlist->[$i]};
5525                 next if !%co;
5526                 my $commit = $co{'id'};
5527                 my $ref = format_ref_marker($refs, $commit);
5528                 git_print_header_div('commit',
5529                                "<span class=\"age\">$co{'age_string'}</span>" .
5530                                esc_html($co{'title'}) . $ref,
5531                                $commit);
5532                 print "<div class=\"title_text\">\n" .
5533                       "<div class=\"log_link\">\n" .
5534                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5535                       " | " .
5536                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5537                       " | " .
5538                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5539                       "<br/>\n" .
5540                       "</div>\n";
5541                       git_print_authorship(\%co, -tag => 'span');
5542                       print "<br/>\n</div>\n";
5543
5544                 print "<div class=\"log_body\">\n";
5545                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5546                 print "</div>\n";
5547         }
5548         if ($extra) {
5549                 print "<div class=\"page_nav\">\n";
5550                 print "$extra\n";
5551                 print "</div>\n";
5552         }
5553 }
5554
5555 sub git_shortlog_body {
5556         # uses global variable $project
5557         my ($commitlist, $from, $to, $refs, $extra) = @_;
5558
5559         $from = 0 unless defined $from;
5560         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5561
5562         print "<table class=\"shortlog\">\n";
5563         my $alternate = 1;
5564         for (my $i = $from; $i <= $to; $i++) {
5565                 my %co = %{$commitlist->[$i]};
5566                 my $commit = $co{'id'};
5567                 my $ref = format_ref_marker($refs, $commit);
5568                 if ($alternate) {
5569                         print "<tr class=\"dark\">\n";
5570                 } else {
5571                         print "<tr class=\"light\">\n";
5572                 }
5573                 $alternate ^= 1;
5574                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5575                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5576                       format_author_html('td', \%co, 10) . "<td>";
5577                 print format_subject_html($co{'title'}, $co{'title_short'},
5578                                           href(action=>"commit", hash=>$commit), $ref);
5579                 print "</td>\n" .
5580                       "<td class=\"link\">" .
5581                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5582                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5583                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5584                 my $snapshot_links = format_snapshot_links($commit);
5585                 if (defined $snapshot_links) {
5586                         print " | " . $snapshot_links;
5587                 }
5588                 print "</td>\n" .
5589                       "</tr>\n";
5590         }
5591         if (defined $extra) {
5592                 print "<tr>\n" .
5593                       "<td colspan=\"4\">$extra</td>\n" .
5594                       "</tr>\n";
5595         }
5596         print "</table>\n";
5597 }
5598
5599 sub git_history_body {
5600         # Warning: assumes constant type (blob or tree) during history
5601         my ($commitlist, $from, $to, $refs, $extra,
5602             $file_name, $file_hash, $ftype) = @_;
5603
5604         $from = 0 unless defined $from;
5605         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5606
5607         print "<table class=\"history\">\n";
5608         my $alternate = 1;
5609         for (my $i = $from; $i <= $to; $i++) {
5610                 my %co = %{$commitlist->[$i]};
5611                 if (!%co) {
5612                         next;
5613                 }
5614                 my $commit = $co{'id'};
5615
5616                 my $ref = format_ref_marker($refs, $commit);
5617
5618                 if ($alternate) {
5619                         print "<tr class=\"dark\">\n";
5620                 } else {
5621                         print "<tr class=\"light\">\n";
5622                 }
5623                 $alternate ^= 1;
5624                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5625         # shortlog:   format_author_html('td', \%co, 10)
5626                       format_author_html('td', \%co, 15, 3) . "<td>";
5627                 # originally git_history used chop_str($co{'title'}, 50)
5628                 print format_subject_html($co{'title'}, $co{'title_short'},
5629                                           href(action=>"commit", hash=>$commit), $ref);
5630                 print "</td>\n" .
5631                       "<td class=\"link\">" .
5632                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5633                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5634
5635                 if ($ftype eq 'blob') {
5636                         my $blob_current = $file_hash;
5637                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5638                         if (defined $blob_current && defined $blob_parent &&
5639                                         $blob_current ne $blob_parent) {
5640                                 print " | " .
5641                                         $cgi->a({-href => href(action=>"blobdiff",
5642                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5643                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5644                                                                file_name=>$file_name)},
5645                                                 "diff to current");
5646                         }
5647                 }
5648                 print "</td>\n" .
5649                       "</tr>\n";
5650         }
5651         if (defined $extra) {
5652                 print "<tr>\n" .
5653                       "<td colspan=\"4\">$extra</td>\n" .
5654                       "</tr>\n";
5655         }
5656         print "</table>\n";
5657 }
5658
5659 sub git_tags_body {
5660         # uses global variable $project
5661         my ($taglist, $from, $to, $extra) = @_;
5662         $from = 0 unless defined $from;
5663         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5664
5665         print "<table class=\"tags\">\n";
5666         my $alternate = 1;
5667         for (my $i = $from; $i <= $to; $i++) {
5668                 my $entry = $taglist->[$i];
5669                 my %tag = %$entry;
5670                 my $comment = $tag{'subject'};
5671                 my $comment_short;
5672                 if (defined $comment) {
5673                         $comment_short = chop_str($comment, 30, 5);
5674                 }
5675                 if ($alternate) {
5676                         print "<tr class=\"dark\">\n";
5677                 } else {
5678                         print "<tr class=\"light\">\n";
5679                 }
5680                 $alternate ^= 1;
5681                 if (defined $tag{'age'}) {
5682                         print "<td><i>$tag{'age'}</i></td>\n";
5683                 } else {
5684                         print "<td></td>\n";
5685                 }
5686                 print "<td>" .
5687                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5688                                -class => "list name"}, esc_html($tag{'name'})) .
5689                       "</td>\n" .
5690                       "<td>";
5691                 if (defined $comment) {
5692                         print format_subject_html($comment, $comment_short,
5693                                                   href(action=>"tag", hash=>$tag{'id'}));
5694                 }
5695                 print "</td>\n" .
5696                       "<td class=\"selflink\">";
5697                 if ($tag{'type'} eq "tag") {
5698                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5699                 } else {
5700                         print "&nbsp;";
5701                 }
5702                 print "</td>\n" .
5703                       "<td class=\"link\">" . " | " .
5704                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5705                 if ($tag{'reftype'} eq "commit") {
5706                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5707                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5708                 } elsif ($tag{'reftype'} eq "blob") {
5709                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5710                 }
5711                 print "</td>\n" .
5712                       "</tr>";
5713         }
5714         if (defined $extra) {
5715                 print "<tr>\n" .
5716                       "<td colspan=\"5\">$extra</td>\n" .
5717                       "</tr>\n";
5718         }
5719         print "</table>\n";
5720 }
5721
5722 sub git_heads_body {
5723         # uses global variable $project
5724         my ($headlist, $head_at, $from, $to, $extra) = @_;
5725         $from = 0 unless defined $from;
5726         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5727
5728         print "<table class=\"heads\">\n";
5729         my $alternate = 1;
5730         for (my $i = $from; $i <= $to; $i++) {
5731                 my $entry = $headlist->[$i];
5732                 my %ref = %$entry;
5733                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5734                 if ($alternate) {
5735                         print "<tr class=\"dark\">\n";
5736                 } else {
5737                         print "<tr class=\"light\">\n";
5738                 }
5739                 $alternate ^= 1;
5740                 print "<td><i>$ref{'age'}</i></td>\n" .
5741                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5742                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5743                                -class => "list name"},esc_html($ref{'name'})) .
5744                       "</td>\n" .
5745                       "<td class=\"link\">" .
5746                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5747                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5748                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5749                       "</td>\n" .
5750                       "</tr>";
5751         }
5752         if (defined $extra) {
5753                 print "<tr>\n" .
5754                       "<td colspan=\"3\">$extra</td>\n" .
5755                       "</tr>\n";
5756         }
5757         print "</table>\n";
5758 }
5759
5760 # Display a single remote block
5761 sub git_remote_block {
5762         my ($remote, $rdata, $limit, $head) = @_;
5763
5764         my $heads = $rdata->{'heads'};
5765         my $fetch = $rdata->{'fetch'};
5766         my $push = $rdata->{'push'};
5767
5768         my $urls_table = "<table class=\"projects_list\">\n" ;
5769
5770         if (defined $fetch) {
5771                 if ($fetch eq $push) {
5772                         $urls_table .= format_repo_url("URL", $fetch);
5773                 } else {
5774                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5775                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5776                 }
5777         } elsif (defined $push) {
5778                 $urls_table .= format_repo_url("Push URL", $push);
5779         } else {
5780                 $urls_table .= format_repo_url("", "No remote URL");
5781         }
5782
5783         $urls_table .= "</table>\n";
5784
5785         my $dots;
5786         if (defined $limit && $limit < @$heads) {
5787                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5788         }
5789
5790         print $urls_table;
5791         git_heads_body($heads, $head, 0, $limit, $dots);
5792 }
5793
5794 # Display a list of remote names with the respective fetch and push URLs
5795 sub git_remotes_list {
5796         my ($remotedata, $limit) = @_;
5797         print "<table class=\"heads\">\n";
5798         my $alternate = 1;
5799         my @remotes = sort keys %$remotedata;
5800
5801         my $limited = $limit && $limit < @remotes;
5802
5803         $#remotes = $limit - 1 if $limited;
5804
5805         while (my $remote = shift @remotes) {
5806                 my $rdata = $remotedata->{$remote};
5807                 my $fetch = $rdata->{'fetch'};
5808                 my $push = $rdata->{'push'};
5809                 if ($alternate) {
5810                         print "<tr class=\"dark\">\n";
5811                 } else {
5812                         print "<tr class=\"light\">\n";
5813                 }
5814                 $alternate ^= 1;
5815                 print "<td>" .
5816                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5817                                -class=> "list name"},esc_html($remote)) .
5818                       "</td>";
5819                 print "<td class=\"link\">" .
5820                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5821                       " | " .
5822                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5823                       "</td>";
5824
5825                 print "</tr>\n";
5826         }
5827
5828         if ($limited) {
5829                 print "<tr>\n" .
5830                       "<td colspan=\"3\">" .
5831                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5832                       "</td>\n" . "</tr>\n";
5833         }
5834
5835         print "</table>";
5836 }
5837
5838 # Display remote heads grouped by remote, unless there are too many
5839 # remotes, in which case we only display the remote names
5840 sub git_remotes_body {
5841         my ($remotedata, $limit, $head) = @_;
5842         if ($limit and $limit < keys %$remotedata) {
5843                 git_remotes_list($remotedata, $limit);
5844         } else {
5845                 fill_remote_heads($remotedata);
5846                 while (my ($remote, $rdata) = each %$remotedata) {
5847                         git_print_section({-class=>"remote", -id=>$remote},
5848                                 ["remotes", $remote, $remote], sub {
5849                                         git_remote_block($remote, $rdata, $limit, $head);
5850                                 });
5851                 }
5852         }
5853 }
5854
5855 sub git_search_message {
5856         my %co = @_;
5857
5858         my $greptype;
5859         if ($searchtype eq 'commit') {
5860                 $greptype = "--grep=";
5861         } elsif ($searchtype eq 'author') {
5862                 $greptype = "--author=";
5863         } elsif ($searchtype eq 'committer') {
5864                 $greptype = "--committer=";
5865         }
5866         $greptype .= $searchtext;
5867         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5868                                        $greptype, '--regexp-ignore-case',
5869                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5870
5871         my $paging_nav = '';
5872         if ($page > 0) {
5873                 $paging_nav .=
5874                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5875                                 "first") .
5876                         " &sdot; " .
5877                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5878                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5879         } else {
5880                 $paging_nav .= "first &sdot; prev";
5881         }
5882         my $next_link = '';
5883         if ($#commitlist >= 100) {
5884                 $next_link =
5885                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5886                                  -accesskey => "n", -title => "Alt-n"}, "next");
5887                 $paging_nav .= " &sdot; $next_link";
5888         } else {
5889                 $paging_nav .= " &sdot; next";
5890         }
5891
5892         git_header_html();
5893
5894         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5895         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5896         if ($page == 0 && !@commitlist) {
5897                 print "<p>No match.</p>\n";
5898         } else {
5899                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5900         }
5901
5902         git_footer_html();
5903 }
5904
5905 sub git_search_changes {
5906         my %co = @_;
5907
5908         local $/ = "\n";
5909         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5910                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5911                 ($search_use_regexp ? '--pickaxe-regex' : ())
5912                         or die_error(500, "Open git-log failed");
5913
5914         git_header_html();
5915
5916         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5917         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5918
5919         print "<table class=\"pickaxe search\">\n";
5920         my $alternate = 1;
5921         undef %co;
5922         my @files;
5923         while (my $line = <$fd>) {
5924                 chomp $line;
5925                 next unless $line;
5926
5927                 my %set = parse_difftree_raw_line($line);
5928                 if (defined $set{'commit'}) {
5929                         # finish previous commit
5930                         if (%co) {
5931                                 print "</td>\n" .
5932                                       "<td class=\"link\">" .
5933                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5934                                               "commit") .
5935                                       " | " .
5936                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5937                                                              hash_base=>$co{'id'})},
5938                                               "tree") .
5939                                       "</td>\n" .
5940                                       "</tr>\n";
5941                         }
5942
5943                         if ($alternate) {
5944                                 print "<tr class=\"dark\">\n";
5945                         } else {
5946                                 print "<tr class=\"light\">\n";
5947                         }
5948                         $alternate ^= 1;
5949                         %co = parse_commit($set{'commit'});
5950                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5951                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5952                               "<td><i>$author</i></td>\n" .
5953                               "<td>" .
5954                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5955                                       -class => "list subject"},
5956                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5957                 } elsif (defined $set{'to_id'}) {
5958                         next if ($set{'to_id'} =~ m/^0{40}$/);
5959
5960                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5961                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5962                                       -class => "list"},
5963                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5964                               "<br/>\n";
5965                 }
5966         }
5967         close $fd;
5968
5969         # finish last commit (warning: repetition!)
5970         if (%co) {
5971                 print "</td>\n" .
5972                       "<td class=\"link\">" .
5973                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5974                               "commit") .
5975                       " | " .
5976                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5977                                              hash_base=>$co{'id'})},
5978                               "tree") .
5979                       "</td>\n" .
5980                       "</tr>\n";
5981         }
5982
5983         print "</table>\n";
5984
5985         git_footer_html();
5986 }
5987
5988 sub git_search_files {
5989         my %co = @_;
5990
5991         local $/ = "\n";
5992         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5993                 $search_use_regexp ? ('-E', '-i') : '-F',
5994                 $searchtext, $co{'tree'}
5995                         or die_error(500, "Open git-grep failed");
5996
5997         git_header_html();
5998
5999         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6000         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6001
6002         print "<table class=\"grep_search\">\n";
6003         my $alternate = 1;
6004         my $matches = 0;
6005         my $lastfile = '';
6006         my $file_href;
6007         while (my $line = <$fd>) {
6008                 chomp $line;
6009                 my ($file, $lno, $ltext, $binary);
6010                 last if ($matches++ > 1000);
6011                 if ($line =~ /^Binary file (.+) matches$/) {
6012                         $file = $1;
6013                         $binary = 1;
6014                 } else {
6015                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6016                         $file =~ s/^$co{'tree'}://;
6017                 }
6018                 if ($file ne $lastfile) {
6019                         $lastfile and print "</td></tr>\n";
6020                         if ($alternate++) {
6021                                 print "<tr class=\"dark\">\n";
6022                         } else {
6023                                 print "<tr class=\"light\">\n";
6024                         }
6025                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6026                                           file_name=>$file);
6027                         print "<td class=\"list\">".
6028                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6029                         print "</td><td>\n";
6030                         $lastfile = $file;
6031                 }
6032                 if ($binary) {
6033                         print "<div class=\"binary\">Binary file</div>\n";
6034                 } else {
6035                         $ltext = untabify($ltext);
6036                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6037                                 $ltext = esc_html($1, -nbsp=>1);
6038                                 $ltext .= '<span class="match">';
6039                                 $ltext .= esc_html($2, -nbsp=>1);
6040                                 $ltext .= '</span>';
6041                                 $ltext .= esc_html($3, -nbsp=>1);
6042                         } else {
6043                                 $ltext = esc_html($ltext, -nbsp=>1);
6044                         }
6045                         print "<div class=\"pre\">" .
6046                                 $cgi->a({-href => $file_href.'#l'.$lno,
6047                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6048                                 ' ' .  $ltext . "</div>\n";
6049                 }
6050         }
6051         if ($lastfile) {
6052                 print "</td></tr>\n";
6053                 if ($matches > 1000) {
6054                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6055                 }
6056         } else {
6057                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6058         }
6059         close $fd;
6060
6061         print "</table>\n";
6062
6063         git_footer_html();
6064 }
6065
6066 sub git_search_grep_body {
6067         my ($commitlist, $from, $to, $extra) = @_;
6068         $from = 0 unless defined $from;
6069         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6070
6071         print "<table class=\"commit_search\">\n";
6072         my $alternate = 1;
6073         for (my $i = $from; $i <= $to; $i++) {
6074                 my %co = %{$commitlist->[$i]};
6075                 if (!%co) {
6076                         next;
6077                 }
6078                 my $commit = $co{'id'};
6079                 if ($alternate) {
6080                         print "<tr class=\"dark\">\n";
6081                 } else {
6082                         print "<tr class=\"light\">\n";
6083                 }
6084                 $alternate ^= 1;
6085                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6086                       format_author_html('td', \%co, 15, 5) .
6087                       "<td>" .
6088                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6089                                -class => "list subject"},
6090                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6091                 my $comment = $co{'comment'};
6092                 foreach my $line (@$comment) {
6093                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6094                                 my ($lead, $match, $trail) = ($1, $2, $3);
6095                                 $match = chop_str($match, 70, 5, 'center');
6096                                 my $contextlen = int((80 - length($match))/2);
6097                                 $contextlen = 30 if ($contextlen > 30);
6098                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6099                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6100
6101                                 $lead  = esc_html($lead);
6102                                 $match = esc_html($match);
6103                                 $trail = esc_html($trail);
6104
6105                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6106                         }
6107                 }
6108                 print "</td>\n" .
6109                       "<td class=\"link\">" .
6110                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6111                       " | " .
6112                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6113                       " | " .
6114                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6115                 print "</td>\n" .
6116                       "</tr>\n";
6117         }
6118         if (defined $extra) {
6119                 print "<tr>\n" .
6120                       "<td colspan=\"3\">$extra</td>\n" .
6121                       "</tr>\n";
6122         }
6123         print "</table>\n";
6124 }
6125
6126 ## ======================================================================
6127 ## ======================================================================
6128 ## actions
6129
6130 sub git_project_list {
6131         my $order = $input_params{'order'};
6132         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6133                 die_error(400, "Unknown order parameter");
6134         }
6135
6136         my @list = git_get_projects_list($project_filter, $strict_export);
6137         if (!@list) {
6138                 die_error(404, "No projects found");
6139         }
6140
6141         git_header_html();
6142         if (defined $home_text && -f $home_text) {
6143                 print "<div class=\"index_include\">\n";
6144                 insert_file($home_text);
6145                 print "</div>\n";
6146         }
6147
6148         git_project_search_form($searchtext, $search_use_regexp);
6149         git_project_list_body(\@list, $order);
6150         git_footer_html();
6151 }
6152
6153 sub git_forks {
6154         my $order = $input_params{'order'};
6155         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6156                 die_error(400, "Unknown order parameter");
6157         }
6158
6159         my $filter = $project;
6160         $filter =~ s/\.git$//;
6161         my @list = git_get_projects_list($filter);
6162         if (!@list) {
6163                 die_error(404, "No forks found");
6164         }
6165
6166         git_header_html();
6167         git_print_page_nav('','');
6168         git_print_header_div('summary', "$project forks");
6169         git_project_list_body(\@list, $order);
6170         git_footer_html();
6171 }
6172
6173 sub git_project_index {
6174         my @projects = git_get_projects_list($project_filter, $strict_export);
6175         if (!@projects) {
6176                 die_error(404, "No projects found");
6177         }
6178
6179         print $cgi->header(
6180                 -type => 'text/plain',
6181                 -charset => 'utf-8',
6182                 -content_disposition => 'inline; filename="index.aux"');
6183
6184         foreach my $pr (@projects) {
6185                 if (!exists $pr->{'owner'}) {
6186                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6187                 }
6188
6189                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6190                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6191                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6192                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6193                 $path  =~ s/ /\+/g;
6194                 $owner =~ s/ /\+/g;
6195
6196                 print "$path $owner\n";
6197         }
6198 }
6199
6200 sub git_summary {
6201         my $descr = git_get_project_description($project) || "none";
6202         my %co = parse_commit("HEAD");
6203         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6204         my $head = $co{'id'};
6205         my $remote_heads = gitweb_check_feature('remote_heads');
6206
6207         my $owner = git_get_project_owner($project);
6208
6209         my $refs = git_get_references();
6210         # These get_*_list functions return one more to allow us to see if
6211         # there are more ...
6212         my @taglist  = git_get_tags_list(16);
6213         my @headlist = git_get_heads_list(16);
6214         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6215         my @forklist;
6216         my $check_forks = gitweb_check_feature('forks');
6217
6218         if ($check_forks) {
6219                 # find forks of a project
6220                 my $filter = $project;
6221                 $filter =~ s/\.git$//;
6222                 @forklist = git_get_projects_list($filter);
6223                 # filter out forks of forks
6224                 @forklist = filter_forks_from_projects_list(\@forklist)
6225                         if (@forklist);
6226         }
6227
6228         git_header_html();
6229         git_print_page_nav('summary','', $head);
6230
6231         print "<div class=\"title\">&nbsp;</div>\n";
6232         print "<table class=\"projects_list\">\n" .
6233               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6234               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6235         if (defined $cd{'rfc2822'}) {
6236                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6237                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6238         }
6239
6240         # use per project git URL list in $projectroot/$project/cloneurl
6241         # or make project git URL from git base URL and project name
6242         my $url_tag = "URL";
6243         my @url_list = git_get_project_url_list($project);
6244         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6245         foreach my $git_url (@url_list) {
6246                 next unless $git_url;
6247                 print format_repo_url($url_tag, $git_url);
6248                 $url_tag = "";
6249         }
6250
6251         # Tag cloud
6252         my $show_ctags = gitweb_check_feature('ctags');
6253         if ($show_ctags) {
6254                 my $ctags = git_get_project_ctags($project);
6255                 if (%$ctags) {
6256                         # without ability to add tags, don't show if there are none
6257                         my $cloud = git_populate_project_tagcloud($ctags);
6258                         print "<tr id=\"metadata_ctags\">" .
6259                               "<td>content tags</td>" .
6260                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6261                               "</tr>\n";
6262                 }
6263         }
6264
6265         print "</table>\n";
6266
6267         # If XSS prevention is on, we don't include README.html.
6268         # TODO: Allow a readme in some safe format.
6269         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6270                 print "<div class=\"title\">readme</div>\n" .
6271                       "<div class=\"readme\">\n";
6272                 insert_file("$projectroot/$project/README.html");
6273                 print "\n</div>\n"; # class="readme"
6274         }
6275
6276         # we need to request one more than 16 (0..15) to check if
6277         # those 16 are all
6278         my @commitlist = $head ? parse_commits($head, 17) : ();
6279         if (@commitlist) {
6280                 git_print_header_div('shortlog');
6281                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6282                                   $#commitlist <=  15 ? undef :
6283                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6284         }
6285
6286         if (@taglist) {
6287                 git_print_header_div('tags');
6288                 git_tags_body(\@taglist, 0, 15,
6289                               $#taglist <=  15 ? undef :
6290                               $cgi->a({-href => href(action=>"tags")}, "..."));
6291         }
6292
6293         if (@headlist) {
6294                 git_print_header_div('heads');
6295                 git_heads_body(\@headlist, $head, 0, 15,
6296                                $#headlist <= 15 ? undef :
6297                                $cgi->a({-href => href(action=>"heads")}, "..."));
6298         }
6299
6300         if (%remotedata) {
6301                 git_print_header_div('remotes');
6302                 git_remotes_body(\%remotedata, 15, $head);
6303         }
6304
6305         if (@forklist) {
6306                 git_print_header_div('forks');
6307                 git_project_list_body(\@forklist, 'age', 0, 15,
6308                                       $#forklist <= 15 ? undef :
6309                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6310                                       'no_header');
6311         }
6312
6313         git_footer_html();
6314 }
6315
6316 sub git_tag {
6317         my %tag = parse_tag($hash);
6318
6319         if (! %tag) {
6320                 die_error(404, "Unknown tag object");
6321         }
6322
6323         my $head = git_get_head_hash($project);
6324         git_header_html();
6325         git_print_page_nav('','', $head,undef,$head);
6326         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6327         print "<div class=\"title_text\">\n" .
6328               "<table class=\"object_header\">\n" .
6329               "<tr>\n" .
6330               "<td>object</td>\n" .
6331               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6332                                $tag{'object'}) . "</td>\n" .
6333               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6334                                               $tag{'type'}) . "</td>\n" .
6335               "</tr>\n";
6336         if (defined($tag{'author'})) {
6337                 git_print_authorship_rows(\%tag, 'author');
6338         }
6339         print "</table>\n\n" .
6340               "</div>\n";
6341         print "<div class=\"page_body\">";
6342         my $comment = $tag{'comment'};
6343         foreach my $line (@$comment) {
6344                 chomp $line;
6345                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6346         }
6347         print "</div>\n";
6348         git_footer_html();
6349 }
6350
6351 sub git_blame_common {
6352         my $format = shift || 'porcelain';
6353         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6354                 $format = 'incremental';
6355                 $action = 'blame_incremental'; # for page title etc
6356         }
6357
6358         # permissions
6359         gitweb_check_feature('blame')
6360                 or die_error(403, "Blame view not allowed");
6361
6362         # error checking
6363         die_error(400, "No file name given") unless $file_name;
6364         $hash_base ||= git_get_head_hash($project);
6365         die_error(404, "Couldn't find base commit") unless $hash_base;
6366         my %co = parse_commit($hash_base)
6367                 or die_error(404, "Commit not found");
6368         my $ftype = "blob";
6369         if (!defined $hash) {
6370                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6371                         or die_error(404, "Error looking up file");
6372         } else {
6373                 $ftype = git_get_type($hash);
6374                 if ($ftype !~ "blob") {
6375                         die_error(400, "Object is not a blob");
6376                 }
6377         }
6378
6379         my $fd;
6380         if ($format eq 'incremental') {
6381                 # get file contents (as base)
6382                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6383                         or die_error(500, "Open git-cat-file failed");
6384         } elsif ($format eq 'data') {
6385                 # run git-blame --incremental
6386                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6387                         $hash_base, "--", $file_name
6388                         or die_error(500, "Open git-blame --incremental failed");
6389         } else {
6390                 # run git-blame --porcelain
6391                 open $fd, "-|", git_cmd(), "blame", '-p',
6392                         $hash_base, '--', $file_name
6393                         or die_error(500, "Open git-blame --porcelain failed");
6394         }
6395
6396         # incremental blame data returns early
6397         if ($format eq 'data') {
6398                 print $cgi->header(
6399                         -type=>"text/plain", -charset => "utf-8",
6400                         -status=> "200 OK");
6401                 local $| = 1; # output autoflush
6402                 while (my $line = <$fd>) {
6403                         print to_utf8($line);
6404                 }
6405                 close $fd
6406                         or print "ERROR $!\n";
6407
6408                 print 'END';
6409                 if (defined $t0 && gitweb_check_feature('timed')) {
6410                         print ' '.
6411                               tv_interval($t0, [ gettimeofday() ]).
6412                               ' '.$number_of_git_cmds;
6413                 }
6414                 print "\n";
6415
6416                 return;
6417         }
6418
6419         # page header
6420         git_header_html();
6421         my $formats_nav =
6422                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6423                         "blob") .
6424                 " | ";
6425         if ($format eq 'incremental') {
6426                 $formats_nav .=
6427                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6428                                 "blame") . " (non-incremental)";
6429         } else {
6430                 $formats_nav .=
6431                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6432                                 "blame") . " (incremental)";
6433         }
6434         $formats_nav .=
6435                 " | " .
6436                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6437                         "history") .
6438                 " | " .
6439                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6440                         "HEAD");
6441         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6442         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6443         git_print_page_path($file_name, $ftype, $hash_base);
6444
6445         # page body
6446         if ($format eq 'incremental') {
6447                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6448                       "This page requires JavaScript to run.\n Use ".
6449                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6450                               'this page').
6451                       " instead.\n".
6452                       "</b></center></div>\n</noscript>\n";
6453
6454                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6455         }
6456
6457         print qq!<div class="page_body">\n!;
6458         print qq!<div id="progress_info">... / ...</div>\n!
6459                 if ($format eq 'incremental');
6460         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6461               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6462               qq!<thead>\n!.
6463               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6464               qq!</thead>\n!.
6465               qq!<tbody>\n!;
6466
6467         my @rev_color = qw(light dark);
6468         my $num_colors = scalar(@rev_color);
6469         my $current_color = 0;
6470
6471         if ($format eq 'incremental') {
6472                 my $color_class = $rev_color[$current_color];
6473
6474                 #contents of a file
6475                 my $linenr = 0;
6476         LINE:
6477                 while (my $line = <$fd>) {
6478                         chomp $line;
6479                         $linenr++;
6480
6481                         print qq!<tr id="l$linenr" class="$color_class">!.
6482                               qq!<td class="sha1"><a href=""> </a></td>!.
6483                               qq!<td class="linenr">!.
6484                               qq!<a class="linenr" href="">$linenr</a></td>!;
6485                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6486                         print qq!</tr>\n!;
6487                 }
6488
6489         } else { # porcelain, i.e. ordinary blame
6490                 my %metainfo = (); # saves information about commits
6491
6492                 # blame data
6493         LINE:
6494                 while (my $line = <$fd>) {
6495                         chomp $line;
6496                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6497                         # no <lines in group> for subsequent lines in group of lines
6498                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6499                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6500                         if (!exists $metainfo{$full_rev}) {
6501                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6502                         }
6503                         my $meta = $metainfo{$full_rev};
6504                         my $data;
6505                         while ($data = <$fd>) {
6506                                 chomp $data;
6507                                 last if ($data =~ s/^\t//); # contents of line
6508                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6509                                         $meta->{$1} = $2 unless exists $meta->{$1};
6510                                 }
6511                                 if ($data =~ /^previous /) {
6512                                         $meta->{'nprevious'}++;
6513                                 }
6514                         }
6515                         my $short_rev = substr($full_rev, 0, 8);
6516                         my $author = $meta->{'author'};
6517                         my %date =
6518                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6519                         my $date = $date{'iso-tz'};
6520                         if ($group_size) {
6521                                 $current_color = ($current_color + 1) % $num_colors;
6522                         }
6523                         my $tr_class = $rev_color[$current_color];
6524                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6525                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6526                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6527                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6528                         if ($group_size) {
6529                                 print "<td class=\"sha1\"";
6530                                 print " title=\"". esc_html($author) . ", $date\"";
6531                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6532                                 print ">";
6533                                 print $cgi->a({-href => href(action=>"commit",
6534                                                              hash=>$full_rev,
6535                                                              file_name=>$file_name)},
6536                                               esc_html($short_rev));
6537                                 if ($group_size >= 2) {
6538                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6539                                         if (@author_initials) {
6540                                                 print "<br />" .
6541                                                       esc_html(join('', @author_initials));
6542                                                 #           or join('.', ...)
6543                                         }
6544                                 }
6545                                 print "</td>\n";
6546                         }
6547                         # 'previous' <sha1 of parent commit> <filename at commit>
6548                         if (exists $meta->{'previous'} &&
6549                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6550                                 $meta->{'parent'} = $1;
6551                                 $meta->{'file_parent'} = unquote($2);
6552                         }
6553                         my $linenr_commit =
6554                                 exists($meta->{'parent'}) ?
6555                                 $meta->{'parent'} : $full_rev;
6556                         my $linenr_filename =
6557                                 exists($meta->{'file_parent'}) ?
6558                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6559                         my $blamed = href(action => 'blame',
6560                                           file_name => $linenr_filename,
6561                                           hash_base => $linenr_commit);
6562                         print "<td class=\"linenr\">";
6563                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6564                                         -class => "linenr" },
6565                                       esc_html($lineno));
6566                         print "</td>";
6567                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6568                         print "</tr>\n";
6569                 } # end while
6570
6571         }
6572
6573         # footer
6574         print "</tbody>\n".
6575               "</table>\n"; # class="blame"
6576         print "</div>\n";   # class="blame_body"
6577         close $fd
6578                 or print "Reading blob failed\n";
6579
6580         git_footer_html();
6581 }
6582
6583 sub git_blame {
6584         git_blame_common();
6585 }
6586
6587 sub git_blame_incremental {
6588         git_blame_common('incremental');
6589 }
6590
6591 sub git_blame_data {
6592         git_blame_common('data');
6593 }
6594
6595 sub git_tags {
6596         my $head = git_get_head_hash($project);
6597         git_header_html();
6598         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6599         git_print_header_div('summary', $project);
6600
6601         my @tagslist = git_get_tags_list();
6602         if (@tagslist) {
6603                 git_tags_body(\@tagslist);
6604         }
6605         git_footer_html();
6606 }
6607
6608 sub git_heads {
6609         my $head = git_get_head_hash($project);
6610         git_header_html();
6611         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6612         git_print_header_div('summary', $project);
6613
6614         my @headslist = git_get_heads_list();
6615         if (@headslist) {
6616                 git_heads_body(\@headslist, $head);
6617         }
6618         git_footer_html();
6619 }
6620
6621 # used both for single remote view and for list of all the remotes
6622 sub git_remotes {
6623         gitweb_check_feature('remote_heads')
6624                 or die_error(403, "Remote heads view is disabled");
6625
6626         my $head = git_get_head_hash($project);
6627         my $remote = $input_params{'hash'};
6628
6629         my $remotedata = git_get_remotes_list($remote);
6630         die_error(500, "Unable to get remote information") unless defined $remotedata;
6631
6632         unless (%$remotedata) {
6633                 die_error(404, defined $remote ?
6634                         "Remote $remote not found" :
6635                         "No remotes found");
6636         }
6637
6638         git_header_html(undef, undef, -action_extra => $remote);
6639         git_print_page_nav('', '',  $head, undef, $head,
6640                 format_ref_views($remote ? '' : 'remotes'));
6641
6642         fill_remote_heads($remotedata);
6643         if (defined $remote) {
6644                 git_print_header_div('remotes', "$remote remote for $project");
6645                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6646         } else {
6647                 git_print_header_div('summary', "$project remotes");
6648                 git_remotes_body($remotedata, undef, $head);
6649         }
6650
6651         git_footer_html();
6652 }
6653
6654 sub git_blob_plain {
6655         my $type = shift;
6656         my $expires;
6657
6658         if (!defined $hash) {
6659                 if (defined $file_name) {
6660                         my $base = $hash_base || git_get_head_hash($project);
6661                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6662                                 or die_error(404, "Cannot find file");
6663                 } else {
6664                         die_error(400, "No file name defined");
6665                 }
6666         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6667                 # blobs defined by non-textual hash id's can be cached
6668                 $expires = "+1d";
6669         }
6670
6671         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6672                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6673
6674         # content-type (can include charset)
6675         $type = blob_contenttype($fd, $file_name, $type);
6676
6677         # "save as" filename, even when no $file_name is given
6678         my $save_as = "$hash";
6679         if (defined $file_name) {
6680                 $save_as = $file_name;
6681         } elsif ($type =~ m/^text\//) {
6682                 $save_as .= '.txt';
6683         }
6684
6685         # With XSS prevention on, blobs of all types except a few known safe
6686         # ones are served with "Content-Disposition: attachment" to make sure
6687         # they don't run in our security domain.  For certain image types,
6688         # blob view writes an <img> tag referring to blob_plain view, and we
6689         # want to be sure not to break that by serving the image as an
6690         # attachment (though Firefox 3 doesn't seem to care).
6691         my $sandbox = $prevent_xss &&
6692                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6693
6694         # serve text/* as text/plain
6695         if ($prevent_xss &&
6696             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6697              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6698                 my $rest = $1;
6699                 $rest = defined $rest ? $rest : '';
6700                 $type = "text/plain$rest";
6701         }
6702
6703         print $cgi->header(
6704                 -type => $type,
6705                 -expires => $expires,
6706                 -content_disposition =>
6707                         ($sandbox ? 'attachment' : 'inline')
6708                         . '; filename="' . $save_as . '"');
6709         local $/ = undef;
6710         binmode STDOUT, ':raw';
6711         print <$fd>;
6712         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6713         close $fd;
6714 }
6715
6716 sub git_blob {
6717         my $expires;
6718
6719         if (!defined $hash) {
6720                 if (defined $file_name) {
6721                         my $base = $hash_base || git_get_head_hash($project);
6722                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6723                                 or die_error(404, "Cannot find file");
6724                 } else {
6725                         die_error(400, "No file name defined");
6726                 }
6727         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6728                 # blobs defined by non-textual hash id's can be cached
6729                 $expires = "+1d";
6730         }
6731
6732         my $have_blame = gitweb_check_feature('blame');
6733         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6734                 or die_error(500, "Couldn't cat $file_name, $hash");
6735         my $mimetype = blob_mimetype($fd, $file_name);
6736         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6737         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6738                 close $fd;
6739                 return git_blob_plain($mimetype);
6740         }
6741         # we can have blame only for text/* mimetype
6742         $have_blame &&= ($mimetype =~ m!^text/!);
6743
6744         my $highlight = gitweb_check_feature('highlight');
6745         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6746         $fd = run_highlighter($fd, $highlight, $syntax)
6747                 if $syntax;
6748
6749         git_header_html(undef, $expires);
6750         my $formats_nav = '';
6751         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6752                 if (defined $file_name) {
6753                         if ($have_blame) {
6754                                 $formats_nav .=
6755                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6756                                                 "blame") .
6757                                         " | ";
6758                         }
6759                         $formats_nav .=
6760                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6761                                         "history") .
6762                                 " | " .
6763                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6764                                         "raw") .
6765                                 " | " .
6766                                 $cgi->a({-href => href(action=>"blob",
6767                                                        hash_base=>"HEAD", file_name=>$file_name)},
6768                                         "HEAD");
6769                 } else {
6770                         $formats_nav .=
6771                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6772                                         "raw");
6773                 }
6774                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6775                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6776         } else {
6777                 print "<div class=\"page_nav\">\n" .
6778                       "<br/><br/></div>\n" .
6779                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6780         }
6781         git_print_page_path($file_name, "blob", $hash_base);
6782         print "<div class=\"page_body\">\n";
6783         if ($mimetype =~ m!^image/!) {
6784                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6785                 if ($file_name) {
6786                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6787                 }
6788                 print qq! src="! .
6789                       href(action=>"blob_plain", hash=>$hash,
6790                            hash_base=>$hash_base, file_name=>$file_name) .
6791                       qq!" />\n!;
6792         } else {
6793                 my $nr;
6794                 while (my $line = <$fd>) {
6795                         chomp $line;
6796                         $nr++;
6797                         $line = untabify($line);
6798                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6799                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6800                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6801                 }
6802         }
6803         close $fd
6804                 or print "Reading blob failed.\n";
6805         print "</div>";
6806         git_footer_html();
6807 }
6808
6809 sub git_tree {
6810         if (!defined $hash_base) {
6811                 $hash_base = "HEAD";
6812         }
6813         if (!defined $hash) {
6814                 if (defined $file_name) {
6815                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6816                 } else {
6817                         $hash = $hash_base;
6818                 }
6819         }
6820         die_error(404, "No such tree") unless defined($hash);
6821
6822         my $show_sizes = gitweb_check_feature('show-sizes');
6823         my $have_blame = gitweb_check_feature('blame');
6824
6825         my @entries = ();
6826         {
6827                 local $/ = "\0";
6828                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6829                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6830                         or die_error(500, "Open git-ls-tree failed");
6831                 @entries = map { chomp; $_ } <$fd>;
6832                 close $fd
6833                         or die_error(404, "Reading tree failed");
6834         }
6835
6836         my $refs = git_get_references();
6837         my $ref = format_ref_marker($refs, $hash_base);
6838         git_header_html();
6839         my $basedir = '';
6840         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6841                 my @views_nav = ();
6842                 if (defined $file_name) {
6843                         push @views_nav,
6844                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6845                                         "history"),
6846                                 $cgi->a({-href => href(action=>"tree",
6847                                                        hash_base=>"HEAD", file_name=>$file_name)},
6848                                         "HEAD"),
6849                 }
6850                 my $snapshot_links = format_snapshot_links($hash);
6851                 if (defined $snapshot_links) {
6852                         # FIXME: Should be available when we have no hash base as well.
6853                         push @views_nav, $snapshot_links;
6854                 }
6855                 git_print_page_nav('tree','', $hash_base, undef, undef,
6856                                    join(' | ', @views_nav));
6857                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6858         } else {
6859                 undef $hash_base;
6860                 print "<div class=\"page_nav\">\n";
6861                 print "<br/><br/></div>\n";
6862                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6863         }
6864         if (defined $file_name) {
6865                 $basedir = $file_name;
6866                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6867                         $basedir .= '/';
6868                 }
6869                 git_print_page_path($file_name, 'tree', $hash_base);
6870         }
6871         print "<div class=\"page_body\">\n";
6872         print "<table class=\"tree\">\n";
6873         my $alternate = 1;
6874         # '..' (top directory) link if possible
6875         if (defined $hash_base &&
6876             defined $file_name && $file_name =~ m![^/]+$!) {
6877                 if ($alternate) {
6878                         print "<tr class=\"dark\">\n";
6879                 } else {
6880                         print "<tr class=\"light\">\n";
6881                 }
6882                 $alternate ^= 1;
6883
6884                 my $up = $file_name;
6885                 $up =~ s!/?[^/]+$!!;
6886                 undef $up unless $up;
6887                 # based on git_print_tree_entry
6888                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6889                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6890                 print '<td class="list">';
6891                 print $cgi->a({-href => href(action=>"tree",
6892                                              hash_base=>$hash_base,
6893                                              file_name=>$up)},
6894                               "..");
6895                 print "</td>\n";
6896                 print "<td class=\"link\"></td>\n";
6897
6898                 print "</tr>\n";
6899         }
6900         foreach my $line (@entries) {
6901                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6902
6903                 if ($alternate) {
6904                         print "<tr class=\"dark\">\n";
6905                 } else {
6906                         print "<tr class=\"light\">\n";
6907                 }
6908                 $alternate ^= 1;
6909
6910                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6911
6912                 print "</tr>\n";
6913         }
6914         print "</table>\n" .
6915               "</div>";
6916         git_footer_html();
6917 }
6918
6919 sub snapshot_name {
6920         my ($project, $hash) = @_;
6921
6922         # path/to/project.git  -> project
6923         # path/to/project/.git -> project
6924         my $name = to_utf8($project);
6925         $name =~ s,([^/])/*\.git$,$1,;
6926         $name = basename($name);
6927         # sanitize name
6928         $name =~ s/[[:cntrl:]]/?/g;
6929
6930         my $ver = $hash;
6931         if ($hash =~ /^[0-9a-fA-F]+$/) {
6932                 # shorten SHA-1 hash
6933                 my $full_hash = git_get_full_hash($project, $hash);
6934                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6935                         $ver = git_get_short_hash($project, $hash);
6936                 }
6937         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6938                 # tags don't need shortened SHA-1 hash
6939                 $ver = $1;
6940         } else {
6941                 # branches and other need shortened SHA-1 hash
6942                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6943                         $ver = $1;
6944                 }
6945                 $ver .= '-' . git_get_short_hash($project, $hash);
6946         }
6947         # in case of hierarchical branch names
6948         $ver =~ s!/!.!g;
6949
6950         # name = project-version_string
6951         $name = "$name-$ver";
6952
6953         return wantarray ? ($name, $name) : $name;
6954 }
6955
6956 sub git_snapshot {
6957         my $format = $input_params{'snapshot_format'};
6958         if (!@snapshot_fmts) {
6959                 die_error(403, "Snapshots not allowed");
6960         }
6961         # default to first supported snapshot format
6962         $format ||= $snapshot_fmts[0];
6963         if ($format !~ m/^[a-z0-9]+$/) {
6964                 die_error(400, "Invalid snapshot format parameter");
6965         } elsif (!exists($known_snapshot_formats{$format})) {
6966                 die_error(400, "Unknown snapshot format");
6967         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6968                 die_error(403, "Snapshot format not allowed");
6969         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6970                 die_error(403, "Unsupported snapshot format");
6971         }
6972
6973         my $type = git_get_type("$hash^{}");
6974         if (!$type) {
6975                 die_error(404, 'Object does not exist');
6976         }  elsif ($type eq 'blob') {
6977                 die_error(400, 'Object is not a tree-ish');
6978         }
6979
6980         my ($name, $prefix) = snapshot_name($project, $hash);
6981         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6982         my $cmd = quote_command(
6983                 git_cmd(), 'archive',
6984                 "--format=$known_snapshot_formats{$format}{'format'}",
6985                 "--prefix=$prefix/", $hash);
6986         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6987                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6988         }
6989
6990         $filename =~ s/(["\\])/\\$1/g;
6991         print $cgi->header(
6992                 -type => $known_snapshot_formats{$format}{'type'},
6993                 -content_disposition => 'inline; filename="' . $filename . '"',
6994                 -status => '200 OK');
6995
6996         open my $fd, "-|", $cmd
6997                 or die_error(500, "Execute git-archive failed");
6998         binmode STDOUT, ':raw';
6999         print <$fd>;
7000         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7001         close $fd;
7002 }
7003
7004 sub git_log_generic {
7005         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7006
7007         my $head = git_get_head_hash($project);
7008         if (!defined $base) {
7009                 $base = $head;
7010         }
7011         if (!defined $page) {
7012                 $page = 0;
7013         }
7014         my $refs = git_get_references();
7015
7016         my $commit_hash = $base;
7017         if (defined $parent) {
7018                 $commit_hash = "$parent..$base";
7019         }
7020         my @commitlist =
7021                 parse_commits($commit_hash, 101, (100 * $page),
7022                               defined $file_name ? ($file_name, "--full-history") : ());
7023
7024         my $ftype;
7025         if (!defined $file_hash && defined $file_name) {
7026                 # some commits could have deleted file in question,
7027                 # and not have it in tree, but one of them has to have it
7028                 for (my $i = 0; $i < @commitlist; $i++) {
7029                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7030                         last if defined $file_hash;
7031                 }
7032         }
7033         if (defined $file_hash) {
7034                 $ftype = git_get_type($file_hash);
7035         }
7036         if (defined $file_name && !defined $ftype) {
7037                 die_error(500, "Unknown type of object");
7038         }
7039         my %co;
7040         if (defined $file_name) {
7041                 %co = parse_commit($base)
7042                         or die_error(404, "Unknown commit object");
7043         }
7044
7045
7046         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7047         my $next_link = '';
7048         if ($#commitlist >= 100) {
7049                 $next_link =
7050                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7051                                  -accesskey => "n", -title => "Alt-n"}, "next");
7052         }
7053         my $patch_max = gitweb_get_feature('patches');
7054         if ($patch_max && !defined $file_name) {
7055                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7056                         $paging_nav .= " &sdot; " .
7057                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7058                                         "patches");
7059                 }
7060         }
7061
7062         git_header_html();
7063         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7064         if (defined $file_name) {
7065                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7066         } else {
7067                 git_print_header_div('summary', $project)
7068         }
7069         git_print_page_path($file_name, $ftype, $hash_base)
7070                 if (defined $file_name);
7071
7072         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7073                      $file_name, $file_hash, $ftype);
7074
7075         git_footer_html();
7076 }
7077
7078 sub git_log {
7079         git_log_generic('log', \&git_log_body,
7080                         $hash, $hash_parent);
7081 }
7082
7083 sub git_commit {
7084         $hash ||= $hash_base || "HEAD";
7085         my %co = parse_commit($hash)
7086             or die_error(404, "Unknown commit object");
7087
7088         my $parent  = $co{'parent'};
7089         my $parents = $co{'parents'}; # listref
7090
7091         # we need to prepare $formats_nav before any parameter munging
7092         my $formats_nav;
7093         if (!defined $parent) {
7094                 # --root commitdiff
7095                 $formats_nav .= '(initial)';
7096         } elsif (@$parents == 1) {
7097                 # single parent commit
7098                 $formats_nav .=
7099                         '(parent: ' .
7100                         $cgi->a({-href => href(action=>"commit",
7101                                                hash=>$parent)},
7102                                 esc_html(substr($parent, 0, 7))) .
7103                         ')';
7104         } else {
7105                 # merge commit
7106                 $formats_nav .=
7107                         '(merge: ' .
7108                         join(' ', map {
7109                                 $cgi->a({-href => href(action=>"commit",
7110                                                        hash=>$_)},
7111                                         esc_html(substr($_, 0, 7)));
7112                         } @$parents ) .
7113                         ')';
7114         }
7115         if (gitweb_check_feature('patches') && @$parents <= 1) {
7116                 $formats_nav .= " | " .
7117                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7118                                 "patch");
7119         }
7120
7121         if (!defined $parent) {
7122                 $parent = "--root";
7123         }
7124         my @difftree;
7125         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7126                 @diff_opts,
7127                 (@$parents <= 1 ? $parent : '-c'),
7128                 $hash, "--"
7129                 or die_error(500, "Open git-diff-tree failed");
7130         @difftree = map { chomp; $_ } <$fd>;
7131         close $fd or die_error(404, "Reading git-diff-tree failed");
7132
7133         # non-textual hash id's can be cached
7134         my $expires;
7135         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7136                 $expires = "+1d";
7137         }
7138         my $refs = git_get_references();
7139         my $ref = format_ref_marker($refs, $co{'id'});
7140
7141         git_header_html(undef, $expires);
7142         git_print_page_nav('commit', '',
7143                            $hash, $co{'tree'}, $hash,
7144                            $formats_nav);
7145
7146         if (defined $co{'parent'}) {
7147                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7148         } else {
7149                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7150         }
7151         print "<div class=\"title_text\">\n" .
7152               "<table class=\"object_header\">\n";
7153         git_print_authorship_rows(\%co);
7154         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7155         print "<tr>" .
7156               "<td>tree</td>" .
7157               "<td class=\"sha1\">" .
7158               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7159                        class => "list"}, $co{'tree'}) .
7160               "</td>" .
7161               "<td class=\"link\">" .
7162               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7163                       "tree");
7164         my $snapshot_links = format_snapshot_links($hash);
7165         if (defined $snapshot_links) {
7166                 print " | " . $snapshot_links;
7167         }
7168         print "</td>" .
7169               "</tr>\n";
7170
7171         foreach my $par (@$parents) {
7172                 print "<tr>" .
7173                       "<td>parent</td>" .
7174                       "<td class=\"sha1\">" .
7175                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7176                                class => "list"}, $par) .
7177                       "</td>" .
7178                       "<td class=\"link\">" .
7179                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7180                       " | " .
7181                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7182                       "</td>" .
7183                       "</tr>\n";
7184         }
7185         print "</table>".
7186               "</div>\n";
7187
7188         print "<div class=\"page_body\">\n";
7189         git_print_log($co{'comment'});
7190         print "</div>\n";
7191
7192         git_difftree_body(\@difftree, $hash, @$parents);
7193
7194         git_footer_html();
7195 }
7196
7197 sub git_object {
7198         # object is defined by:
7199         # - hash or hash_base alone
7200         # - hash_base and file_name
7201         my $type;
7202
7203         # - hash or hash_base alone
7204         if ($hash || ($hash_base && !defined $file_name)) {
7205                 my $object_id = $hash || $hash_base;
7206
7207                 open my $fd, "-|", quote_command(
7208                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7209                         or die_error(404, "Object does not exist");
7210                 $type = <$fd>;
7211                 chomp $type;
7212                 close $fd
7213                         or die_error(404, "Object does not exist");
7214
7215         # - hash_base and file_name
7216         } elsif ($hash_base && defined $file_name) {
7217                 $file_name =~ s,/+$,,;
7218
7219                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7220                         or die_error(404, "Base object does not exist");
7221
7222                 # here errors should not hapen
7223                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7224                         or die_error(500, "Open git-ls-tree failed");
7225                 my $line = <$fd>;
7226                 close $fd;
7227
7228                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7229                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7230                         die_error(404, "File or directory for given base does not exist");
7231                 }
7232                 $type = $2;
7233                 $hash = $3;
7234         } else {
7235                 die_error(400, "Not enough information to find object");
7236         }
7237
7238         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7239                                           hash=>$hash, hash_base=>$hash_base,
7240                                           file_name=>$file_name),
7241                              -status => '302 Found');
7242 }
7243
7244 sub git_blobdiff {
7245         my $format = shift || 'html';
7246         my $diff_style = $input_params{'diff_style'} || 'inline';
7247
7248         my $fd;
7249         my @difftree;
7250         my %diffinfo;
7251         my $expires;
7252
7253         # preparing $fd and %diffinfo for git_patchset_body
7254         # new style URI
7255         if (defined $hash_base && defined $hash_parent_base) {
7256                 if (defined $file_name) {
7257                         # read raw output
7258                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7259                                 $hash_parent_base, $hash_base,
7260                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7261                                 or die_error(500, "Open git-diff-tree failed");
7262                         @difftree = map { chomp; $_ } <$fd>;
7263                         close $fd
7264                                 or die_error(404, "Reading git-diff-tree failed");
7265                         @difftree
7266                                 or die_error(404, "Blob diff not found");
7267
7268                 } elsif (defined $hash &&
7269                          $hash =~ /[0-9a-fA-F]{40}/) {
7270                         # try to find filename from $hash
7271
7272                         # read filtered raw output
7273                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7274                                 $hash_parent_base, $hash_base, "--"
7275                                 or die_error(500, "Open git-diff-tree failed");
7276                         @difftree =
7277                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7278                                 # $hash == to_id
7279                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7280                                 map { chomp; $_ } <$fd>;
7281                         close $fd
7282                                 or die_error(404, "Reading git-diff-tree failed");
7283                         @difftree
7284                                 or die_error(404, "Blob diff not found");
7285
7286                 } else {
7287                         die_error(400, "Missing one of the blob diff parameters");
7288                 }
7289
7290                 if (@difftree > 1) {
7291                         die_error(400, "Ambiguous blob diff specification");
7292                 }
7293
7294                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7295                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7296                 $file_name   ||= $diffinfo{'to_file'};
7297
7298                 $hash_parent ||= $diffinfo{'from_id'};
7299                 $hash        ||= $diffinfo{'to_id'};
7300
7301                 # non-textual hash id's can be cached
7302                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7303                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7304                         $expires = '+1d';
7305                 }
7306
7307                 # open patch output
7308                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7309                         '-p', ($format eq 'html' ? "--full-index" : ()),
7310                         $hash_parent_base, $hash_base,
7311                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7312                         or die_error(500, "Open git-diff-tree failed");
7313         }
7314
7315         # old/legacy style URI -- not generated anymore since 1.4.3.
7316         if (!%diffinfo) {
7317                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7318         }
7319
7320         # header
7321         if ($format eq 'html') {
7322                 my $formats_nav =
7323                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7324                                 "raw");
7325                 $formats_nav .= diff_style_nav($diff_style);
7326                 git_header_html(undef, $expires);
7327                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7328                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7329                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7330                 } else {
7331                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7332                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7333                 }
7334                 if (defined $file_name) {
7335                         git_print_page_path($file_name, "blob", $hash_base);
7336                 } else {
7337                         print "<div class=\"page_path\"></div>\n";
7338                 }
7339
7340         } elsif ($format eq 'plain') {
7341                 print $cgi->header(
7342                         -type => 'text/plain',
7343                         -charset => 'utf-8',
7344                         -expires => $expires,
7345                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7346
7347                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7348
7349         } else {
7350                 die_error(400, "Unknown blobdiff format");
7351         }
7352
7353         # patch
7354         if ($format eq 'html') {
7355                 print "<div class=\"page_body\">\n";
7356
7357                 git_patchset_body($fd, $diff_style,
7358                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7359                 close $fd;
7360
7361                 print "</div>\n"; # class="page_body"
7362                 git_footer_html();
7363
7364         } else {
7365                 while (my $line = <$fd>) {
7366                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7367                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7368
7369                         print $line;
7370
7371                         last if $line =~ m!^\+\+\+!;
7372                 }
7373                 local $/ = undef;
7374                 print <$fd>;
7375                 close $fd;
7376         }
7377 }
7378
7379 sub git_blobdiff_plain {
7380         git_blobdiff('plain');
7381 }
7382
7383 # assumes that it is added as later part of already existing navigation,
7384 # so it returns "| foo | bar" rather than just "foo | bar"
7385 sub diff_style_nav {
7386         my ($diff_style, $is_combined) = @_;
7387         $diff_style ||= 'inline';
7388
7389         return "" if ($is_combined);
7390
7391         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7392         my %styles = @styles;
7393         @styles =
7394                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7395
7396         return join '',
7397                 map { " | ".$_ }
7398                 map {
7399                         $_ eq $diff_style ? $styles{$_} :
7400                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7401                 } @styles;
7402 }
7403
7404 sub git_commitdiff {
7405         my %params = @_;
7406         my $format = $params{-format} || 'html';
7407         my $diff_style = $input_params{'diff_style'} || 'inline';
7408
7409         my ($patch_max) = gitweb_get_feature('patches');
7410         if ($format eq 'patch') {
7411                 die_error(403, "Patch view not allowed") unless $patch_max;
7412         }
7413
7414         $hash ||= $hash_base || "HEAD";
7415         my %co = parse_commit($hash)
7416             or die_error(404, "Unknown commit object");
7417
7418         # choose format for commitdiff for merge
7419         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7420                 $hash_parent = '--cc';
7421         }
7422         # we need to prepare $formats_nav before almost any parameter munging
7423         my $formats_nav;
7424         if ($format eq 'html') {
7425                 $formats_nav =
7426                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7427                                 "raw");
7428                 if ($patch_max && @{$co{'parents'}} <= 1) {
7429                         $formats_nav .= " | " .
7430                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7431                                         "patch");
7432                 }
7433                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7434
7435                 if (defined $hash_parent &&
7436                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7437                         # commitdiff with two commits given
7438                         my $hash_parent_short = $hash_parent;
7439                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7440                                 $hash_parent_short = substr($hash_parent, 0, 7);
7441                         }
7442                         $formats_nav .=
7443                                 ' (from';
7444                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7445                                 if ($co{'parents'}[$i] eq $hash_parent) {
7446                                         $formats_nav .= ' parent ' . ($i+1);
7447                                         last;
7448                                 }
7449                         }
7450                         $formats_nav .= ': ' .
7451                                 $cgi->a({-href => href(-replay=>1,
7452                                                        hash=>$hash_parent, hash_base=>undef)},
7453                                         esc_html($hash_parent_short)) .
7454                                 ')';
7455                 } elsif (!$co{'parent'}) {
7456                         # --root commitdiff
7457                         $formats_nav .= ' (initial)';
7458                 } elsif (scalar @{$co{'parents'}} == 1) {
7459                         # single parent commit
7460                         $formats_nav .=
7461                                 ' (parent: ' .
7462                                 $cgi->a({-href => href(-replay=>1,
7463                                                        hash=>$co{'parent'}, hash_base=>undef)},
7464                                         esc_html(substr($co{'parent'}, 0, 7))) .
7465                                 ')';
7466                 } else {
7467                         # merge commit
7468                         if ($hash_parent eq '--cc') {
7469                                 $formats_nav .= ' | ' .
7470                                         $cgi->a({-href => href(-replay=>1,
7471                                                                hash=>$hash, hash_parent=>'-c')},
7472                                                 'combined');
7473                         } else { # $hash_parent eq '-c'
7474                                 $formats_nav .= ' | ' .
7475                                         $cgi->a({-href => href(-replay=>1,
7476                                                                hash=>$hash, hash_parent=>'--cc')},
7477                                                 'compact');
7478                         }
7479                         $formats_nav .=
7480                                 ' (merge: ' .
7481                                 join(' ', map {
7482                                         $cgi->a({-href => href(-replay=>1,
7483                                                                hash=>$_, hash_base=>undef)},
7484                                                 esc_html(substr($_, 0, 7)));
7485                                 } @{$co{'parents'}} ) .
7486                                 ')';
7487                 }
7488         }
7489
7490         my $hash_parent_param = $hash_parent;
7491         if (!defined $hash_parent_param) {
7492                 # --cc for multiple parents, --root for parentless
7493                 $hash_parent_param =
7494                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7495         }
7496
7497         # read commitdiff
7498         my $fd;
7499         my @difftree;
7500         if ($format eq 'html') {
7501                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7502                         "--no-commit-id", "--patch-with-raw", "--full-index",
7503                         $hash_parent_param, $hash, "--"
7504                         or die_error(500, "Open git-diff-tree failed");
7505
7506                 while (my $line = <$fd>) {
7507                         chomp $line;
7508                         # empty line ends raw part of diff-tree output
7509                         last unless $line;
7510                         push @difftree, scalar parse_difftree_raw_line($line);
7511                 }
7512
7513         } elsif ($format eq 'plain') {
7514                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7515                         '-p', $hash_parent_param, $hash, "--"
7516                         or die_error(500, "Open git-diff-tree failed");
7517         } elsif ($format eq 'patch') {
7518                 # For commit ranges, we limit the output to the number of
7519                 # patches specified in the 'patches' feature.
7520                 # For single commits, we limit the output to a single patch,
7521                 # diverging from the git-format-patch default.
7522                 my @commit_spec = ();
7523                 if ($hash_parent) {
7524                         if ($patch_max > 0) {
7525                                 push @commit_spec, "-$patch_max";
7526                         }
7527                         push @commit_spec, '-n', "$hash_parent..$hash";
7528                 } else {
7529                         if ($params{-single}) {
7530                                 push @commit_spec, '-1';
7531                         } else {
7532                                 if ($patch_max > 0) {
7533                                         push @commit_spec, "-$patch_max";
7534                                 }
7535                                 push @commit_spec, "-n";
7536                         }
7537                         push @commit_spec, '--root', $hash;
7538                 }
7539                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7540                         '--encoding=utf8', '--stdout', @commit_spec
7541                         or die_error(500, "Open git-format-patch failed");
7542         } else {
7543                 die_error(400, "Unknown commitdiff format");
7544         }
7545
7546         # non-textual hash id's can be cached
7547         my $expires;
7548         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7549                 $expires = "+1d";
7550         }
7551
7552         # write commit message
7553         if ($format eq 'html') {
7554                 my $refs = git_get_references();
7555                 my $ref = format_ref_marker($refs, $co{'id'});
7556
7557                 git_header_html(undef, $expires);
7558                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7559                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7560                 print "<div class=\"title_text\">\n" .
7561                       "<table class=\"object_header\">\n";
7562                 git_print_authorship_rows(\%co);
7563                 print "</table>".
7564                       "</div>\n";
7565                 print "<div class=\"page_body\">\n";
7566                 if (@{$co{'comment'}} > 1) {
7567                         print "<div class=\"log\">\n";
7568                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7569                         print "</div>\n"; # class="log"
7570                 }
7571
7572         } elsif ($format eq 'plain') {
7573                 my $refs = git_get_references("tags");
7574                 my $tagname = git_get_rev_name_tags($hash);
7575                 my $filename = basename($project) . "-$hash.patch";
7576
7577                 print $cgi->header(
7578                         -type => 'text/plain',
7579                         -charset => 'utf-8',
7580                         -expires => $expires,
7581                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7582                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7583                 print "From: " . to_utf8($co{'author'}) . "\n";
7584                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7585                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7586
7587                 print "X-Git-Tag: $tagname\n" if $tagname;
7588                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7589
7590                 foreach my $line (@{$co{'comment'}}) {
7591                         print to_utf8($line) . "\n";
7592                 }
7593                 print "---\n\n";
7594         } elsif ($format eq 'patch') {
7595                 my $filename = basename($project) . "-$hash.patch";
7596
7597                 print $cgi->header(
7598                         -type => 'text/plain',
7599                         -charset => 'utf-8',
7600                         -expires => $expires,
7601                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7602         }
7603
7604         # write patch
7605         if ($format eq 'html') {
7606                 my $use_parents = !defined $hash_parent ||
7607                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7608                 git_difftree_body(\@difftree, $hash,
7609                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7610                 print "<br/>\n";
7611
7612                 git_patchset_body($fd, $diff_style,
7613                                   \@difftree, $hash,
7614                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7615                 close $fd;
7616                 print "</div>\n"; # class="page_body"
7617                 git_footer_html();
7618
7619         } elsif ($format eq 'plain') {
7620                 local $/ = undef;
7621                 print <$fd>;
7622                 close $fd
7623                         or print "Reading git-diff-tree failed\n";
7624         } elsif ($format eq 'patch') {
7625                 local $/ = undef;
7626                 print <$fd>;
7627                 close $fd
7628                         or print "Reading git-format-patch failed\n";
7629         }
7630 }
7631
7632 sub git_commitdiff_plain {
7633         git_commitdiff(-format => 'plain');
7634 }
7635
7636 # format-patch-style patches
7637 sub git_patch {
7638         git_commitdiff(-format => 'patch', -single => 1);
7639 }
7640
7641 sub git_patches {
7642         git_commitdiff(-format => 'patch');
7643 }
7644
7645 sub git_history {
7646         git_log_generic('history', \&git_history_body,
7647                         $hash_base, $hash_parent_base,
7648                         $file_name, $hash);
7649 }
7650
7651 sub git_search {
7652         $searchtype ||= 'commit';
7653
7654         # check if appropriate features are enabled
7655         gitweb_check_feature('search')
7656                 or die_error(403, "Search is disabled");
7657         if ($searchtype eq 'pickaxe') {
7658                 # pickaxe may take all resources of your box and run for several minutes
7659                 # with every query - so decide by yourself how public you make this feature
7660                 gitweb_check_feature('pickaxe')
7661                         or die_error(403, "Pickaxe search is disabled");
7662         }
7663         if ($searchtype eq 'grep') {
7664                 # grep search might be potentially CPU-intensive, too
7665                 gitweb_check_feature('grep')
7666                         or die_error(403, "Grep search is disabled");
7667         }
7668
7669         if (!defined $searchtext) {
7670                 die_error(400, "Text field is empty");
7671         }
7672         if (!defined $hash) {
7673                 $hash = git_get_head_hash($project);
7674         }
7675         my %co = parse_commit($hash);
7676         if (!%co) {
7677                 die_error(404, "Unknown commit object");
7678         }
7679         if (!defined $page) {
7680                 $page = 0;
7681         }
7682
7683         if ($searchtype eq 'commit' ||
7684             $searchtype eq 'author' ||
7685             $searchtype eq 'committer') {
7686                 git_search_message(%co);
7687         } elsif ($searchtype eq 'pickaxe') {
7688                 git_search_changes(%co);
7689         } elsif ($searchtype eq 'grep') {
7690                 git_search_files(%co);
7691         } else {
7692                 die_error(400, "Unknown search type");
7693         }
7694 }
7695
7696 sub git_search_help {
7697         git_header_html();
7698         git_print_page_nav('','', $hash,$hash,$hash);
7699         print <<EOT;
7700 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7701 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7702 the pattern entered is recognized as the POSIX extended
7703 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7704 insensitive).</p>
7705 <dl>
7706 <dt><b>commit</b></dt>
7707 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7708 EOT
7709         my $have_grep = gitweb_check_feature('grep');
7710         if ($have_grep) {
7711                 print <<EOT;
7712 <dt><b>grep</b></dt>
7713 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7714     a different one) are searched for the given pattern. On large trees, this search can take
7715 a while and put some strain on the server, so please use it with some consideration. Note that
7716 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7717 case-sensitive.</dd>
7718 EOT
7719         }
7720         print <<EOT;
7721 <dt><b>author</b></dt>
7722 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7723 <dt><b>committer</b></dt>
7724 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7725 EOT
7726         my $have_pickaxe = gitweb_check_feature('pickaxe');
7727         if ($have_pickaxe) {
7728                 print <<EOT;
7729 <dt><b>pickaxe</b></dt>
7730 <dd>All commits that caused the string to appear or disappear from any file (changes that
7731 added, removed or "modified" the string) will be listed. This search can take a while and
7732 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7733 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7734 EOT
7735         }
7736         print "</dl>\n";
7737         git_footer_html();
7738 }
7739
7740 sub git_shortlog {
7741         git_log_generic('shortlog', \&git_shortlog_body,
7742                         $hash, $hash_parent);
7743 }
7744
7745 ## ......................................................................
7746 ## feeds (RSS, Atom; OPML)
7747
7748 sub git_feed {
7749         my $format = shift || 'atom';
7750         my $have_blame = gitweb_check_feature('blame');
7751
7752         # Atom: http://www.atomenabled.org/developers/syndication/
7753         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7754         if ($format ne 'rss' && $format ne 'atom') {
7755                 die_error(400, "Unknown web feed format");
7756         }
7757
7758         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7759         my $head = $hash || 'HEAD';
7760         my @commitlist = parse_commits($head, 150, 0, $file_name);
7761
7762         my %latest_commit;
7763         my %latest_date;
7764         my $content_type = "application/$format+xml";
7765         if (defined $cgi->http('HTTP_ACCEPT') &&
7766                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7767                 # browser (feed reader) prefers text/xml
7768                 $content_type = 'text/xml';
7769         }
7770         if (defined($commitlist[0])) {
7771                 %latest_commit = %{$commitlist[0]};
7772                 my $latest_epoch = $latest_commit{'committer_epoch'};
7773                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7774                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7775                 if (defined $if_modified) {
7776                         my $since;
7777                         if (eval { require HTTP::Date; 1; }) {
7778                                 $since = HTTP::Date::str2time($if_modified);
7779                         } elsif (eval { require Time::ParseDate; 1; }) {
7780                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7781                         }
7782                         if (defined $since && $latest_epoch <= $since) {
7783                                 print $cgi->header(
7784                                         -type => $content_type,
7785                                         -charset => 'utf-8',
7786                                         -last_modified => $latest_date{'rfc2822'},
7787                                         -status => '304 Not Modified');
7788                                 return;
7789                         }
7790                 }
7791                 print $cgi->header(
7792                         -type => $content_type,
7793                         -charset => 'utf-8',
7794                         -last_modified => $latest_date{'rfc2822'});
7795         } else {
7796                 print $cgi->header(
7797                         -type => $content_type,
7798                         -charset => 'utf-8');
7799         }
7800
7801         # Optimization: skip generating the body if client asks only
7802         # for Last-Modified date.
7803         return if ($cgi->request_method() eq 'HEAD');
7804
7805         # header variables
7806         my $title = "$site_name - $project/$action";
7807         my $feed_type = 'log';
7808         if (defined $hash) {
7809                 $title .= " - '$hash'";
7810                 $feed_type = 'branch log';
7811                 if (defined $file_name) {
7812                         $title .= " :: $file_name";
7813                         $feed_type = 'history';
7814                 }
7815         } elsif (defined $file_name) {
7816                 $title .= " - $file_name";
7817                 $feed_type = 'history';
7818         }
7819         $title .= " $feed_type";
7820         my $descr = git_get_project_description($project);
7821         if (defined $descr) {
7822                 $descr = esc_html($descr);
7823         } else {
7824                 $descr = "$project " .
7825                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7826                          " feed";
7827         }
7828         my $owner = git_get_project_owner($project);
7829         $owner = esc_html($owner);
7830
7831         #header
7832         my $alt_url;
7833         if (defined $file_name) {
7834                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7835         } elsif (defined $hash) {
7836                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7837         } else {
7838                 $alt_url = href(-full=>1, action=>"summary");
7839         }
7840         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7841         if ($format eq 'rss') {
7842                 print <<XML;
7843 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7844 <channel>
7845 XML
7846                 print "<title>$title</title>\n" .
7847                       "<link>$alt_url</link>\n" .
7848                       "<description>$descr</description>\n" .
7849                       "<language>en</language>\n" .
7850                       # project owner is responsible for 'editorial' content
7851                       "<managingEditor>$owner</managingEditor>\n";
7852                 if (defined $logo || defined $favicon) {
7853                         # prefer the logo to the favicon, since RSS
7854                         # doesn't allow both
7855                         my $img = esc_url($logo || $favicon);
7856                         print "<image>\n" .
7857                               "<url>$img</url>\n" .
7858                               "<title>$title</title>\n" .
7859                               "<link>$alt_url</link>\n" .
7860                               "</image>\n";
7861                 }
7862                 if (%latest_date) {
7863                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7864                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7865                 }
7866                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7867         } elsif ($format eq 'atom') {
7868                 print <<XML;
7869 <feed xmlns="http://www.w3.org/2005/Atom">
7870 XML
7871                 print "<title>$title</title>\n" .
7872                       "<subtitle>$descr</subtitle>\n" .
7873                       '<link rel="alternate" type="text/html" href="' .
7874                       $alt_url . '" />' . "\n" .
7875                       '<link rel="self" type="' . $content_type . '" href="' .
7876                       $cgi->self_url() . '" />' . "\n" .
7877                       "<id>" . href(-full=>1) . "</id>\n" .
7878                       # use project owner for feed author
7879                       "<author><name>$owner</name></author>\n";
7880                 if (defined $favicon) {
7881                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7882                 }
7883                 if (defined $logo) {
7884                         # not twice as wide as tall: 72 x 27 pixels
7885                         print "<logo>" . esc_url($logo) . "</logo>\n";
7886                 }
7887                 if (! %latest_date) {
7888                         # dummy date to keep the feed valid until commits trickle in:
7889                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7890                 } else {
7891                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7892                 }
7893                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7894         }
7895
7896         # contents
7897         for (my $i = 0; $i <= $#commitlist; $i++) {
7898                 my %co = %{$commitlist[$i]};
7899                 my $commit = $co{'id'};
7900                 # we read 150, we always show 30 and the ones more recent than 48 hours
7901                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7902                         last;
7903                 }
7904                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7905
7906                 # get list of changed files
7907                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7908                         $co{'parent'} || "--root",
7909                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7910                         or next;
7911                 my @difftree = map { chomp; $_ } <$fd>;
7912                 close $fd
7913                         or next;
7914
7915                 # print element (entry, item)
7916                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7917                 if ($format eq 'rss') {
7918                         print "<item>\n" .
7919                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7920                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7921                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7922                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7923                               "<link>$co_url</link>\n" .
7924                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7925                               "<content:encoded>" .
7926                               "<![CDATA[\n";
7927                 } elsif ($format eq 'atom') {
7928                         print "<entry>\n" .
7929                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7930                               "<updated>$cd{'iso-8601'}</updated>\n" .
7931                               "<author>\n" .
7932                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7933                         if ($co{'author_email'}) {
7934                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7935                         }
7936                         print "</author>\n" .
7937                               # use committer for contributor
7938                               "<contributor>\n" .
7939                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7940                         if ($co{'committer_email'}) {
7941                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7942                         }
7943                         print "</contributor>\n" .
7944                               "<published>$cd{'iso-8601'}</published>\n" .
7945                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7946                               "<id>$co_url</id>\n" .
7947                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7948                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7949                 }
7950                 my $comment = $co{'comment'};
7951                 print "<pre>\n";
7952                 foreach my $line (@$comment) {
7953                         $line = esc_html($line);
7954                         print "$line\n";
7955                 }
7956                 print "</pre><ul>\n";
7957                 foreach my $difftree_line (@difftree) {
7958                         my %difftree = parse_difftree_raw_line($difftree_line);
7959                         next if !$difftree{'from_id'};
7960
7961                         my $file = $difftree{'file'} || $difftree{'to_file'};
7962
7963                         print "<li>" .
7964                               "[" .
7965                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7966                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7967                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7968                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7969                                       -title => "diff"}, 'D');
7970                         if ($have_blame) {
7971                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7972                                                              file_name=>$file, hash_base=>$commit),
7973                                               -title => "blame"}, 'B');
7974                         }
7975                         # if this is not a feed of a file history
7976                         if (!defined $file_name || $file_name ne $file) {
7977                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7978                                                              file_name=>$file, hash=>$commit),
7979                                               -title => "history"}, 'H');
7980                         }
7981                         $file = esc_path($file);
7982                         print "] ".
7983                               "$file</li>\n";
7984                 }
7985                 if ($format eq 'rss') {
7986                         print "</ul>]]>\n" .
7987                               "</content:encoded>\n" .
7988                               "</item>\n";
7989                 } elsif ($format eq 'atom') {
7990                         print "</ul>\n</div>\n" .
7991                               "</content>\n" .
7992                               "</entry>\n";
7993                 }
7994         }
7995
7996         # end of feed
7997         if ($format eq 'rss') {
7998                 print "</channel>\n</rss>\n";
7999         } elsif ($format eq 'atom') {
8000                 print "</feed>\n";
8001         }
8002 }
8003
8004 sub git_rss {
8005         git_feed('rss');
8006 }
8007
8008 sub git_atom {
8009         git_feed('atom');
8010 }
8011
8012 sub git_opml {
8013         my @list = git_get_projects_list($project_filter, $strict_export);
8014         if (!@list) {
8015                 die_error(404, "No projects found");
8016         }
8017
8018         print $cgi->header(
8019                 -type => 'text/xml',
8020                 -charset => 'utf-8',
8021                 -content_disposition => 'inline; filename="opml.xml"');
8022
8023         my $title = esc_html($site_name);
8024         my $filter = " within subdirectory ";
8025         if (defined $project_filter) {
8026                 $filter .= esc_html($project_filter);
8027         } else {
8028                 $filter = "";
8029         }
8030         print <<XML;
8031 <?xml version="1.0" encoding="utf-8"?>
8032 <opml version="1.0">
8033 <head>
8034   <title>$title OPML Export$filter</title>
8035 </head>
8036 <body>
8037 <outline text="git RSS feeds">
8038 XML
8039
8040         foreach my $pr (@list) {
8041                 my %proj = %$pr;
8042                 my $head = git_get_head_hash($proj{'path'});
8043                 if (!defined $head) {
8044                         next;
8045                 }
8046                 $git_dir = "$projectroot/$proj{'path'}";
8047                 my %co = parse_commit($head);
8048                 if (!%co) {
8049                         next;
8050                 }
8051
8052                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8053                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8054                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8055                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8056         }
8057         print <<XML;
8058 </outline>
8059 </body>
8060 </opml>
8061 XML
8062 }