gitweb/gitweb.perl

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