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                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4278 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4279 <script>
4280 function toggleLineNumbers() {
4281         e = document.getElementById("lineNoStyle");
4282         e2 = document.getElementById("lineNoToggle");
4283         if (e2.innerHTML == "[Hide line numbers]") {
4284                 e.innerHTML = ".linenr { display:none; }";
4285                 e2.innerHTML = "[Show line numbers]";
4286         }
4287         else {
4288                 e.innerHTML = "";
4289                 e2.innerHTML = "[Hide line numbers]";
4290         }
4291 }
4292 document.getElementsByTagName("head")[0].innerHTML += "<style id=\'lineNoStyle\'></style>";
4293 toggleLineNumbers();
4294 </script>
4295 ';
4296                 } elsif (defined $type && $type eq 'tree') {
4297                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4298                                                      hash_base=>$hb),
4299                                       -title => $name}, esc_path($basename));
4300                         print " / ";
4301                 } else {
4302                         print esc_path($basename);
4303                 }
4304         }
4305         print "<br/></div>\n";
4306 }
4307
4308 sub git_print_log {
4309         my $log = shift;
4310         my %opts = @_;
4311
4312         if ($opts{'-remove_title'}) {
4313                 # remove title, i.e. first line of log
4314                 shift @$log;
4315         }
4316         # remove leading empty lines
4317         while (defined $log->[0] && $log->[0] eq "") {
4318                 shift @$log;
4319         }
4320
4321         # print log
4322         my $signoff = 0;
4323         my $empty = 0;
4324         foreach my $line (@$log) {
4325                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4326                         $signoff = 1;
4327                         $empty = 0;
4328                         if (! $opts{'-remove_signoff'}) {
4329                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4330                                 next;
4331                         } else {
4332                                 # remove signoff lines
4333                                 next;
4334                         }
4335                 } else {
4336                         $signoff = 0;
4337                 }
4338
4339                 # print only one empty line
4340                 # do not print empty line after signoff
4341                 if ($line eq "") {
4342                         next if ($empty || $signoff);
4343                         $empty = 1;
4344                 } else {
4345                         $empty = 0;
4346                 }
4347
4348                 print format_log_line_html($line) . "<br/>\n";
4349         }
4350
4351         if ($opts{'-final_empty_line'}) {
4352                 # end with single empty line
4353                 print "<br/>\n" unless $empty;
4354         }
4355 }
4356
4357 # return link target (what link points to)
4358 sub git_get_link_target {
4359         my $hash = shift;
4360         my $link_target;
4361
4362         # read link
4363         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4364                 or return;
4365         {
4366                 local $/ = undef;
4367                 $link_target = <$fd>;
4368         }
4369         close $fd
4370                 or return;
4371
4372         return $link_target;
4373 }
4374
4375 # given link target, and the directory (basedir) the link is in,
4376 # return target of link relative to top directory (top tree);
4377 # return undef if it is not possible (including absolute links).
4378 sub normalize_link_target {
4379         my ($link_target, $basedir) = @_;
4380
4381         # absolute symlinks (beginning with '/') cannot be normalized
4382         return if (substr($link_target, 0, 1) eq '/');
4383
4384         # normalize link target to path from top (root) tree (dir)
4385         my $path;
4386         if ($basedir) {
4387                 $path = $basedir . '/' . $link_target;
4388         } else {
4389                 # we are in top (root) tree (dir)
4390                 $path = $link_target;
4391         }
4392
4393         # remove //, /./, and /../
4394         my @path_parts;
4395         foreach my $part (split('/', $path)) {
4396                 # discard '.' and ''
4397                 next if (!$part || $part eq '.');
4398                 # handle '..'
4399                 if ($part eq '..') {
4400                         if (@path_parts) {
4401                                 pop @path_parts;
4402                         } else {
4403                                 # link leads outside repository (outside top dir)
4404                                 return;
4405                         }
4406                 } else {
4407                         push @path_parts, $part;
4408                 }
4409         }
4410         $path = join('/', @path_parts);
4411
4412         return $path;
4413 }
4414
4415 # print tree entry (row of git_tree), but without encompassing <tr> element
4416 sub git_print_tree_entry {
4417         my ($t, $basedir, $hash_base, $have_blame) = @_;
4418
4419         my %base_key = ();
4420         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4421
4422         # The format of a table row is: mode list link.  Where mode is
4423         # the mode of the entry, list is the name of the entry, an href,
4424         # and link is the action links of the entry.
4425
4426         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4427         if (exists $t->{'size'}) {
4428                 print "<td class=\"size\">$t->{'size'}</td>\n";
4429         }
4430         if ($t->{'type'} eq "blob") {
4431                 print "<td class=\"list\">" .
4432                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4433                                                file_name=>"$basedir$t->{'name'}", %base_key),
4434                                 -class => "list"}, esc_path($t->{'name'}));
4435                 if (S_ISLNK(oct $t->{'mode'})) {
4436                         my $link_target = git_get_link_target($t->{'hash'});
4437                         if ($link_target) {
4438                                 my $norm_target = normalize_link_target($link_target, $basedir);
4439                                 if (defined $norm_target) {
4440                                         print " -> " .
4441                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4442                                                                      file_name=>$norm_target),
4443                                                        -title => $norm_target}, esc_path($link_target));
4444                                 } else {
4445                                         print " -> " . esc_path($link_target);
4446                                 }
4447                         }
4448                 }
4449                 print "</td>\n";
4450                 print "<td class=\"link\">";
4451                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4452                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4453                               "blob");
4454                 if ($have_blame) {
4455                         print " | " .
4456                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4457                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4458                                       "blame");
4459                 }
4460                 if (defined $hash_base) {
4461                         print " | " .
4462                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4463                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4464                                       "history");
4465                 }
4466                 print " | " .
4467                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4468                                                file_name=>"$basedir$t->{'name'}")},
4469                                 "raw");
4470                 print "</td>\n";
4471
4472         } elsif ($t->{'type'} eq "tree") {
4473                 print "<td class=\"list\">";
4474                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4475                                              file_name=>"$basedir$t->{'name'}",
4476                                              %base_key)},
4477                               esc_path($t->{'name'}));
4478                 print "</td>\n";
4479                 print "<td class=\"link\">";
4480                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4481                                              file_name=>"$basedir$t->{'name'}",
4482                                              %base_key)},
4483                               "tree");
4484                 if (defined $hash_base) {
4485                         print " | " .
4486                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4487                                                      file_name=>"$basedir$t->{'name'}")},
4488                                       "history");
4489                 }
4490                 print "</td>\n";
4491         } else {
4492                 # unknown object: we can only present history for it
4493                 # (this includes 'commit' object, i.e. submodule support)
4494                 print "<td class=\"list\">" .
4495                       esc_path($t->{'name'}) .
4496                       "</td>\n";
4497                 print "<td class=\"link\">";
4498                 if (defined $hash_base) {
4499                         print $cgi->a({-href => href(action=>"history",
4500                                                      hash_base=>$hash_base,
4501                                                      file_name=>"$basedir$t->{'name'}")},
4502                                       "history");
4503                 }
4504                 print "</td>\n";
4505         }
4506 }
4507
4508 ## ......................................................................
4509 ## functions printing large fragments of HTML
4510
4511 # get pre-image filenames for merge (combined) diff
4512 sub fill_from_file_info {
4513         my ($diff, @parents) = @_;
4514
4515         $diff->{'from_file'} = [ ];
4516         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4517         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4518                 if ($diff->{'status'}[$i] eq 'R' ||
4519                     $diff->{'status'}[$i] eq 'C') {
4520                         $diff->{'from_file'}[$i] =
4521                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4522                 }
4523         }
4524
4525         return $diff;
4526 }
4527
4528 # is current raw difftree line of file deletion
4529 sub is_deleted {
4530         my $diffinfo = shift;
4531
4532         return $diffinfo->{'to_id'} eq ('0' x 40);
4533 }
4534
4535 # does patch correspond to [previous] difftree raw line
4536 # $diffinfo  - hashref of parsed raw diff format
4537 # $patchinfo - hashref of parsed patch diff format
4538 #              (the same keys as in $diffinfo)
4539 sub is_patch_split {
4540         my ($diffinfo, $patchinfo) = @_;
4541
4542         return defined $diffinfo && defined $patchinfo
4543                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4544 }
4545
4546
4547 sub git_difftree_body {
4548         my ($difftree, $hash, @parents) = @_;
4549         my ($parent) = $parents[0];
4550         my $have_blame = gitweb_check_feature('blame');
4551         print "<div class=\"list_head\">\n";
4552         if ($#{$difftree} > 10) {
4553                 print(($#{$difftree} + 1) . " files changed:\n");
4554         }
4555         print "</div>\n";
4556
4557         print "<table class=\"" .
4558               (@parents > 1 ? "combined " : "") .
4559               "diff_tree\">\n";
4560
4561         # header only for combined diff in 'commitdiff' view
4562         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4563         if ($has_header) {
4564                 # table header
4565                 print "<thead><tr>\n" .
4566                        "<th></th><th></th>\n"; # filename, patchN link
4567                 for (my $i = 0; $i < @parents; $i++) {
4568                         my $par = $parents[$i];
4569                         print "<th>" .
4570                               $cgi->a({-href => href(action=>"commitdiff",
4571                                                      hash=>$hash, hash_parent=>$par),
4572                                        -title => 'commitdiff to parent number ' .
4573                                                   ($i+1) . ': ' . substr($par,0,7)},
4574                                       $i+1) .
4575                               "&nbsp;</th>\n";
4576                 }
4577                 print "</tr></thead>\n<tbody>\n";
4578         }
4579
4580         my $alternate = 1;
4581         my $patchno = 0;
4582         foreach my $line (@{$difftree}) {
4583                 my $diff = parsed_difftree_line($line);
4584
4585                 if ($alternate) {
4586                         print "<tr class=\"dark\">\n";
4587                 } else {
4588                         print "<tr class=\"light\">\n";
4589                 }
4590                 $alternate ^= 1;
4591
4592                 if (exists $diff->{'nparents'}) { # combined diff
4593
4594                         fill_from_file_info($diff, @parents)
4595                                 unless exists $diff->{'from_file'};
4596
4597                         if (!is_deleted($diff)) {
4598                                 # file exists in the result (child) commit
4599                                 print "<td>" .
4600                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4601                                                              file_name=>$diff->{'to_file'},
4602                                                              hash_base=>$hash),
4603                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4604                                       "</td>\n";
4605                         } else {
4606                                 print "<td>" .
4607                                       esc_path($diff->{'to_file'}) .
4608                                       "</td>\n";
4609                         }
4610
4611                         if ($action eq 'commitdiff') {
4612                                 # link to patch
4613                                 $patchno++;
4614                                 print "<td class=\"link\">" .
4615                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4616                                               "patch") .
4617                                       " | " .
4618                                       "</td>\n";
4619                         }
4620
4621                         my $has_history = 0;
4622                         my $not_deleted = 0;
4623                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4624                                 my $hash_parent = $parents[$i];
4625                                 my $from_hash = $diff->{'from_id'}[$i];
4626                                 my $from_path = $diff->{'from_file'}[$i];
4627                                 my $status = $diff->{'status'}[$i];
4628
4629                                 $has_history ||= ($status ne 'A');
4630                                 $not_deleted ||= ($status ne 'D');
4631
4632                                 if ($status eq 'A') {
4633                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4634                                 } elsif ($status eq 'D') {
4635                                         print "<td class=\"link\">" .
4636                                               $cgi->a({-href => href(action=>"blob",
4637                                                                      hash_base=>$hash,
4638                                                                      hash=>$from_hash,
4639                                                                      file_name=>$from_path)},
4640                                                       "blob" . ($i+1)) .
4641                                               " | </td>\n";
4642                                 } else {
4643                                         if ($diff->{'to_id'} eq $from_hash) {
4644                                                 print "<td class=\"link nochange\">";
4645                                         } else {
4646                                                 print "<td class=\"link\">";
4647                                         }
4648                                         print $cgi->a({-href => href(action=>"blobdiff",
4649                                                                      hash=>$diff->{'to_id'},
4650                                                                      hash_parent=>$from_hash,
4651                                                                      hash_base=>$hash,
4652                                                                      hash_parent_base=>$hash_parent,
4653                                                                      file_name=>$diff->{'to_file'},
4654                                                                      file_parent=>$from_path)},
4655                                                       "diff" . ($i+1)) .
4656                                               " | </td>\n";
4657                                 }
4658                         }
4659
4660                         print "<td class=\"link\">";
4661                         if ($not_deleted) {
4662                                 print $cgi->a({-href => href(action=>"blob",
4663                                                              hash=>$diff->{'to_id'},
4664                                                              file_name=>$diff->{'to_file'},
4665                                                              hash_base=>$hash)},
4666                                               "blob");
4667                                 print " | " if ($has_history);
4668                         }
4669                         if ($has_history) {
4670                                 print $cgi->a({-href => href(action=>"history",
4671                                                              file_name=>$diff->{'to_file'},
4672                                                              hash_base=>$hash)},
4673                                               "history");
4674                         }
4675                         print "</td>\n";
4676
4677                         print "</tr>\n";
4678                         next; # instead of 'else' clause, to avoid extra indent
4679                 }
4680                 # else ordinary diff
4681
4682                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4683                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4684                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4685                         $to_mode_oct = oct $diff->{'to_mode'};
4686                         if (S_ISREG($to_mode_oct)) { # only for regular file
4687                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4688                         }
4689                         $to_file_type = file_type($diff->{'to_mode'});
4690                 }
4691                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4692                         $from_mode_oct = oct $diff->{'from_mode'};
4693                         if (S_ISREG($from_mode_oct)) { # only for regular file
4694                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4695                         }
4696                         $from_file_type = file_type($diff->{'from_mode'});
4697                 }
4698
4699                 if ($diff->{'status'} eq "A") { # created
4700                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4701                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4702                         $mode_chng   .= "]</span>";
4703                         print "<td>";
4704                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4705                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4706                                       -class => "list"}, esc_path($diff->{'file'}));
4707                         print "</td>\n";
4708                         print "<td>$mode_chng</td>\n";
4709                         print "<td class=\"link\">";
4710                         if ($action eq 'commitdiff') {
4711                                 # link to patch
4712                                 $patchno++;
4713                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4714                                               "patch") .
4715                                       " | ";
4716                         }
4717                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4718                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4719                                       "blob");
4720                         print "</td>\n";
4721
4722                 } elsif ($diff->{'status'} eq "D") { # deleted
4723                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4724                         print "<td>";
4725                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4726                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4727                                        -class => "list"}, esc_path($diff->{'file'}));
4728                         print "</td>\n";
4729                         print "<td>$mode_chng</td>\n";
4730                         print "<td class=\"link\">";
4731                         if ($action eq 'commitdiff') {
4732                                 # link to patch
4733                                 $patchno++;
4734                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4735                                               "patch") .
4736                                       " | ";
4737                         }
4738                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4739                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4740                                       "blob") . " | ";
4741                         if ($have_blame) {
4742                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4743                                                              file_name=>$diff->{'file'})},
4744                                               "blame") . " | ";
4745                         }
4746                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4747                                                      file_name=>$diff->{'file'})},
4748                                       "history");
4749                         print "</td>\n";
4750
4751                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4752                         my $mode_chnge = "";
4753                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4754                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4755                                 if ($from_file_type ne $to_file_type) {
4756                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4757                                 }
4758                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4759                                         if ($from_mode_str && $to_mode_str) {
4760                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4761                                         } elsif ($to_mode_str) {
4762                                                 $mode_chnge .= " mode: $to_mode_str";
4763                                         }
4764                                 }
4765                                 $mode_chnge .= "]</span>\n";
4766                         }
4767                         print "<td>";
4768                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4769                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4770                                       -class => "list"}, esc_path($diff->{'file'}));
4771                         print "</td>\n";
4772                         print "<td>$mode_chnge</td>\n";
4773                         print "<td class=\"link\">";
4774                         if ($action eq 'commitdiff') {
4775                                 # link to patch
4776                                 $patchno++;
4777                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4778                                               "patch") .
4779                                       " | ";
4780                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4781                                 # "commit" view and modified file (not onlu mode changed)
4782                                 print $cgi->a({-href => href(action=>"blobdiff",
4783                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4784                                                              hash_base=>$hash, hash_parent_base=>$parent,
4785                                                              file_name=>$diff->{'file'})},
4786                                               "diff") .
4787                                       " | ";
4788                         }
4789                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4790                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4791                                        "blob") . " | ";
4792                         if ($have_blame) {
4793                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4794                                                              file_name=>$diff->{'file'})},
4795                                               "blame") . " | ";
4796                         }
4797                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4798                                                      file_name=>$diff->{'file'})},
4799                                       "history");
4800                         print "</td>\n";
4801
4802                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4803                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4804                         my $nstatus = $status_name{$diff->{'status'}};
4805                         my $mode_chng = "";
4806                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4807                                 # mode also for directories, so we cannot use $to_mode_str
4808                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4809                         }
4810                         print "<td>" .
4811                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4812                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4813                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4814                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4815                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4816                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4817                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4818                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4819                               "<td class=\"link\">";
4820                         if ($action eq 'commitdiff') {
4821                                 # link to patch
4822                                 $patchno++;
4823                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4824                                               "patch") .
4825                                       " | ";
4826                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4827                                 # "commit" view and modified file (not only pure rename or copy)
4828                                 print $cgi->a({-href => href(action=>"blobdiff",
4829                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4830                                                              hash_base=>$hash, hash_parent_base=>$parent,
4831                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4832                                               "diff") .
4833                                       " | ";
4834                         }
4835                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4836                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4837                                       "blob") . " | ";
4838                         if ($have_blame) {
4839                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4840                                                              file_name=>$diff->{'to_file'})},
4841                                               "blame") . " | ";
4842                         }
4843                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4844                                                     file_name=>$diff->{'to_file'})},
4845                                       "history");
4846                         print "</td>\n";
4847
4848                 } # we should not encounter Unmerged (U) or Unknown (X) status
4849                 print "</tr>\n";
4850         }
4851         print "</tbody>" if $has_header;
4852         print "</table>\n";
4853 }
4854
4855 sub git_patchset_body {
4856         my ($fd, $difftree, $hash, @hash_parents) = @_;
4857         my ($hash_parent) = $hash_parents[0];
4858
4859         my $is_combined = (@hash_parents > 1);
4860         my $patch_idx = 0;
4861         my $patch_number = 0;
4862         my $patch_line;
4863         my $diffinfo;
4864         my $to_name;
4865         my (%from, %to);
4866
4867         print "<div class=\"patchset\">\n";
4868
4869         # skip to first patch
4870         while ($patch_line = <$fd>) {
4871                 chomp $patch_line;
4872
4873                 last if ($patch_line =~ m/^diff /);
4874         }
4875
4876  PATCH:
4877         while ($patch_line) {
4878
4879                 # parse "git diff" header line
4880                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4881                         # $1 is from_name, which we do not use
4882                         $to_name = unquote($2);
4883                         $to_name =~ s!^b/!!;
4884                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4885                         # $1 is 'cc' or 'combined', which we do not use
4886                         $to_name = unquote($2);
4887                 } else {
4888                         $to_name = undef;
4889                 }
4890
4891                 # check if current patch belong to current raw line
4892                 # and parse raw git-diff line if needed
4893                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4894                         # this is continuation of a split patch
4895                         print "<div class=\"patch cont\">\n";
4896                 } else {
4897                         # advance raw git-diff output if needed
4898                         $patch_idx++ if defined $diffinfo;
4899
4900                         # read and prepare patch information
4901                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4902
4903                         # compact combined diff output can have some patches skipped
4904                         # find which patch (using pathname of result) we are at now;
4905                         if ($is_combined) {
4906                                 while ($to_name ne $diffinfo->{'to_file'}) {
4907                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4908                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4909                                               "</div>\n";  # class="patch"
4910
4911                                         $patch_idx++;
4912                                         $patch_number++;
4913
4914                                         last if $patch_idx > $#$difftree;
4915                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4916                                 }
4917                         }
4918
4919                         # modifies %from, %to hashes
4920                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4921
4922                         # this is first patch for raw difftree line with $patch_idx index
4923                         # we index @$difftree array from 0, but number patches from 1
4924                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4925                 }
4926
4927                 # git diff header
4928                 #assert($patch_line =~ m/^diff /) if DEBUG;
4929                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4930                 $patch_number++;
4931                 # print "git diff" header
4932                 print format_git_diff_header_line($patch_line, $diffinfo,
4933                                                   \%from, \%to);
4934
4935                 # print extended diff header
4936                 print "<div class=\"diff extended_header\">\n";
4937         EXTENDED_HEADER:
4938                 while ($patch_line = <$fd>) {
4939                         chomp $patch_line;
4940
4941                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4942
4943                         print format_extended_diff_header_line($patch_line, $diffinfo,
4944                                                                \%from, \%to);
4945                 }
4946                 print "</div>\n"; # class="diff extended_header"
4947
4948                 # from-file/to-file diff header
4949                 if (! $patch_line) {
4950                         print "</div>\n"; # class="patch"
4951                         last PATCH;
4952                 }
4953                 next PATCH if ($patch_line =~ m/^diff /);
4954                 #assert($patch_line =~ m/^---/) if DEBUG;
4955
4956                 my $last_patch_line = $patch_line;
4957                 $patch_line = <$fd>;
4958                 chomp $patch_line;
4959                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4960
4961                 print format_diff_from_to_header($last_patch_line, $patch_line,
4962                                                  $diffinfo, \%from, \%to,
4963                                                  @hash_parents);
4964
4965                 # the patch itself
4966         LINE:
4967                 while ($patch_line = <$fd>) {
4968                         chomp $patch_line;
4969
4970                         next PATCH if ($patch_line =~ m/^diff /);
4971
4972                         print format_diff_line($patch_line, \%from, \%to);
4973                 }
4974
4975         } continue {
4976                 print "</div>\n"; # class="patch"
4977         }
4978
4979         # for compact combined (--cc) format, with chunk and patch simplification
4980         # the patchset might be empty, but there might be unprocessed raw lines
4981         for (++$patch_idx if $patch_number > 0;
4982              $patch_idx < @$difftree;
4983              ++$patch_idx) {
4984                 # read and prepare patch information
4985                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4986
4987                 # generate anchor for "patch" links in difftree / whatchanged part
4988                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4989                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4990                       "</div>\n";  # class="patch"
4991
4992                 $patch_number++;
4993         }
4994
4995         if ($patch_number == 0) {
4996                 if (@hash_parents > 1) {
4997                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4998                 } else {
4999                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5000                 }
5001         }
5002
5003         print "</div>\n"; # class="patchset"
5004 }
5005
5006 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5007
5008 # fills project list info (age, description, owner, category, forks)
5009 # for each project in the list, removing invalid projects from
5010 # returned list
5011 # NOTE: modifies $projlist, but does not remove entries from it
5012 sub fill_project_list_info {
5013         my $projlist = shift;
5014         my @projects;
5015
5016         my $show_ctags = gitweb_check_feature('ctags');
5017  PROJECT:
5018         foreach my $pr (@$projlist) {
5019                 my (@activity) = git_get_last_activity($pr->{'path'});
5020                 unless (@activity) {
5021                         next PROJECT;
5022                 }
5023                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5024                 if (!defined $pr->{'descr'}) {
5025                         my $descr = git_get_project_description($pr->{'path'}) || "";
5026                         $descr = to_utf8($descr);
5027                         $pr->{'descr_long'} = $descr;
5028                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5029                 }
5030                 if (!defined $pr->{'owner'}) {
5031                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5032                 }
5033                 if ($show_ctags) {
5034                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5035                 }
5036                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5037                         my $cat = git_get_project_category($pr->{'path'}) ||
5038                                                            $project_list_default_category;
5039                         $pr->{'category'} = to_utf8($cat);
5040                 }
5041
5042                 push @projects, $pr;
5043         }
5044
5045         return @projects;
5046 }
5047
5048 sub sort_projects_list {
5049         my ($projlist, $order) = @_;
5050         my @projects;
5051
5052         my %order_info = (
5053                 project => { key => 'path', type => 'str' },
5054                 descr => { key => 'descr_long', type => 'str' },
5055                 owner => { key => 'owner', type => 'str' },
5056                 age => { key => 'age', type => 'num' }
5057         );
5058         my $oi = $order_info{$order};
5059         return @$projlist unless defined $oi;
5060         if ($oi->{'type'} eq 'str') {
5061                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5062         } else {
5063                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5064         }
5065
5066         return @projects;
5067 }
5068
5069 # returns a hash of categories, containing the list of project
5070 # belonging to each category
5071 sub build_projlist_by_category {
5072         my ($projlist, $from, $to) = @_;
5073         my %categories;
5074
5075         $from = 0 unless defined $from;
5076         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5077
5078         for (my $i = $from; $i <= $to; $i++) {
5079                 my $pr = $projlist->[$i];
5080                 push @{$categories{ $pr->{'category'} }}, $pr;
5081         }
5082
5083         return wantarray ? %categories : \%categories;
5084 }
5085
5086 # print 'sort by' <th> element, generating 'sort by $name' replay link
5087 # if that order is not selected
5088 sub print_sort_th {
5089         print format_sort_th(@_);
5090 }
5091
5092 sub format_sort_th {
5093         my ($name, $order, $header) = @_;
5094         my $sort_th = "";
5095         $header ||= ucfirst($name);
5096
5097         if ($order eq $name) {
5098                 $sort_th .= "<th>$header</th>\n";
5099         } else {
5100                 $sort_th .= "<th>" .
5101                             $cgi->a({-href => href(-replay=>1, order=>$name),
5102                                      -class => "header"}, $header) .
5103                             "</th>\n";
5104         }
5105
5106         return $sort_th;
5107 }
5108
5109 sub git_project_list_rows {
5110         my ($projlist, $from, $to, $check_forks) = @_;
5111
5112         $from = 0 unless defined $from;
5113         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5114
5115         my $alternate = 1;
5116         for (my $i = $from; $i <= $to; $i++) {
5117                 my $pr = $projlist->[$i];
5118
5119                 if ($alternate) {
5120                         print "<tr class=\"dark\">\n";
5121                 } else {
5122                         print "<tr class=\"light\">\n";
5123                 }
5124                 $alternate ^= 1;
5125
5126                 if ($check_forks) {
5127                         print "<td>";
5128                         if ($pr->{'forks'}) {
5129                                 my $nforks = scalar @{$pr->{'forks'}};
5130                                 if ($nforks > 0) {
5131                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5132                                                        -title => "$nforks forks"}, "+");
5133                                 } else {
5134                                         print $cgi->span({-title => "$nforks forks"}, "+");
5135                                 }
5136                         }
5137                         print "</td>\n";
5138                 }
5139                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5140                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5141                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5142                                         -class => "list", -title => $pr->{'descr_long'}},
5143                                         esc_html($pr->{'descr'})) . "</td>\n" .
5144                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5145                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5146                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5147                       "<td class=\"link\">" .
5148                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5149                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5150                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5151                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5152                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5153                       "</td>\n" .
5154                       "</tr>\n";
5155         }
5156 }
5157
5158 sub git_project_list_body {
5159         # actually uses global variable $project
5160         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5161         my @projects = @$projlist;
5162
5163         my $check_forks = gitweb_check_feature('forks');
5164         my $show_ctags  = gitweb_check_feature('ctags');
5165         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5166         $check_forks = undef
5167                 if ($tagfilter || $searchtext);
5168
5169         # filtering out forks before filling info allows to do less work
5170         @projects = filter_forks_from_projects_list(\@projects)
5171                 if ($check_forks);
5172         @projects = fill_project_list_info(\@projects);
5173         # searching projects require filling to be run before it
5174         @projects = search_projects_list(\@projects,
5175                                          'searchtext' => $searchtext,
5176                                          'tagfilter'  => $tagfilter)
5177                 if ($tagfilter || $searchtext);
5178
5179         $order ||= $default_projects_order;
5180         $from = 0 unless defined $from;
5181         $to = $#projects if (!defined $to || $#projects < $to);
5182
5183         # short circuit
5184         if ($from > $to) {
5185                 print "<center>\n".
5186                       "<b>No such projects found</b><br />\n".
5187                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5188                       "</center>\n<br />\n";
5189                 return;
5190         }
5191
5192         @projects = sort_projects_list(\@projects, $order);
5193
5194         if ($show_ctags) {
5195                 my $ctags = git_gather_all_ctags(\@projects);
5196                 my $cloud = git_populate_project_tagcloud($ctags);
5197                 print git_show_project_tagcloud($cloud, 64);
5198         }
5199
5200         print "<table class=\"project_list\">\n";
5201         unless ($no_header) {
5202                 print "<tr>\n";
5203                 if ($check_forks) {
5204                         print "<th></th>\n";
5205                 }
5206                 print_sort_th('project', $order, 'Project');
5207                 print_sort_th('descr', $order, 'Description');
5208                 print_sort_th('owner', $order, 'Owner');
5209                 print_sort_th('age', $order, 'Last Change');
5210                 print "<th></th>\n" . # for links
5211                       "</tr>\n";
5212         }
5213
5214         if ($projects_list_group_categories) {
5215                 # only display categories with projects in the $from-$to window
5216                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5217                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5218                 foreach my $cat (sort keys %categories) {
5219                         unless ($cat eq "") {
5220                                 print "<tr>\n";
5221                                 if ($check_forks) {
5222                                         print "<td></td>\n";
5223                                 }
5224                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5225                                 print "</tr>\n";
5226                         }
5227
5228                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5229                 }
5230         } else {
5231                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5232         }
5233
5234         if (defined $extra) {
5235                 print "<tr>\n";
5236                 if ($check_forks) {
5237                         print "<td></td>\n";
5238                 }
5239                 print "<td colspan=\"5\">$extra</td>\n" .
5240                       "</tr>\n";
5241         }
5242         print "</table>\n";
5243 }
5244
5245 sub git_log_body {
5246         # uses global variable $project
5247         my ($commitlist, $from, $to, $refs, $extra) = @_;
5248
5249         $from = 0 unless defined $from;
5250         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5251
5252         for (my $i = 0; $i <= $to; $i++) {
5253                 my %co = %{$commitlist->[$i]};
5254                 next if !%co;
5255                 my $commit = $co{'id'};
5256                 my $ref = format_ref_marker($refs, $commit);
5257                 git_print_header_div('commit',
5258                                "<span class=\"age\">$co{'age_string'}</span>" .
5259                                esc_html($co{'title'}) . $ref,
5260                                $commit);
5261                 print "<div class=\"title_text\">\n" .
5262                       "<div class=\"log_link\">\n" .
5263                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5264                       " | " .
5265                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5266                       " | " .
5267                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5268                       "<br/>\n" .
5269                       "</div>\n";
5270                       git_print_authorship(\%co, -tag => 'span');
5271                       print "<br/>\n</div>\n";
5272
5273                 print "<div class=\"log_body\">\n";
5274                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5275                 print "</div>\n";
5276         }
5277         if ($extra) {
5278                 print "<div class=\"page_nav\">\n";
5279                 print "$extra\n";
5280                 print "</div>\n";
5281         }
5282 }
5283
5284 sub git_shortlog_body {
5285         # uses global variable $project
5286         my ($commitlist, $from, $to, $refs, $extra) = @_;
5287
5288         $from = 0 unless defined $from;
5289         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5290
5291         print "<table class=\"shortlog\">\n";
5292         my $alternate = 1;
5293         for (my $i = $from; $i <= $to; $i++) {
5294                 my %co = %{$commitlist->[$i]};
5295                 my $commit = $co{'id'};
5296                 my $ref = format_ref_marker($refs, $commit);
5297                 if ($alternate) {
5298                         print "<tr class=\"dark\">\n";
5299                 } else {
5300                         print "<tr class=\"light\">\n";
5301                 }
5302                 $alternate ^= 1;
5303                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5304                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5305                       format_author_html('td', \%co, 10) . "<td>";
5306                 print format_subject_html($co{'title'}, $co{'title_short'},
5307                                           href(action=>"commit", hash=>$commit), $ref);
5308                 print "</td>\n" .
5309                       "<td class=\"link\">" .
5310                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5311                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5312                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5313                 my $snapshot_links = format_snapshot_links($commit);
5314                 if (defined $snapshot_links) {
5315                         print " | " . $snapshot_links;
5316                 }
5317                 print "</td>\n" .
5318                       "</tr>\n";
5319         }
5320         if (defined $extra) {
5321                 print "<tr>\n" .
5322                       "<td colspan=\"4\">$extra</td>\n" .
5323                       "</tr>\n";
5324         }
5325         print "</table>\n";
5326 }
5327
5328 sub git_history_body {
5329         # Warning: assumes constant type (blob or tree) during history
5330         my ($commitlist, $from, $to, $refs, $extra,
5331             $file_name, $file_hash, $ftype) = @_;
5332
5333         $from = 0 unless defined $from;
5334         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5335
5336         print "<table class=\"history\">\n";
5337         my $alternate = 1;
5338         for (my $i = $from; $i <= $to; $i++) {
5339                 my %co = %{$commitlist->[$i]};
5340                 if (!%co) {
5341                         next;
5342                 }
5343                 my $commit = $co{'id'};
5344
5345                 my $ref = format_ref_marker($refs, $commit);
5346
5347                 if ($alternate) {
5348                         print "<tr class=\"dark\">\n";
5349                 } else {
5350                         print "<tr class=\"light\">\n";
5351                 }
5352                 $alternate ^= 1;
5353                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5354         # shortlog:   format_author_html('td', \%co, 10)
5355                       format_author_html('td', \%co, 15, 3) . "<td>";
5356                 # originally git_history used chop_str($co{'title'}, 50)
5357                 print format_subject_html($co{'title'}, $co{'title_short'},
5358                                           href(action=>"commit", hash=>$commit), $ref);
5359                 print "</td>\n" .
5360                       "<td class=\"link\">" .
5361                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5362                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5363
5364                 if ($ftype eq 'blob') {
5365                         my $blob_current = $file_hash;
5366                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5367                         if (defined $blob_current && defined $blob_parent &&
5368                                         $blob_current ne $blob_parent) {
5369                                 print " | " .
5370                                         $cgi->a({-href => href(action=>"blobdiff",
5371                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5372                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5373                                                                file_name=>$file_name)},
5374                                                 "diff to current");
5375                         }
5376                 }
5377                 print "</td>\n" .
5378                       "</tr>\n";
5379         }
5380         if (defined $extra) {
5381                 print "<tr>\n" .
5382                       "<td colspan=\"4\">$extra</td>\n" .
5383                       "</tr>\n";
5384         }
5385         print "</table>\n";
5386 }
5387
5388 sub git_tags_body {
5389         # uses global variable $project
5390         my ($taglist, $from, $to, $extra) = @_;
5391         $from = 0 unless defined $from;
5392         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5393
5394         print "<table class=\"tags\">\n";
5395         my $alternate = 1;
5396         for (my $i = $from; $i <= $to; $i++) {
5397                 my $entry = $taglist->[$i];
5398                 my %tag = %$entry;
5399                 my $comment = $tag{'subject'};
5400                 my $comment_short;
5401                 if (defined $comment) {
5402                         $comment_short = chop_str($comment, 30, 5);
5403                 }
5404                 if ($alternate) {
5405                         print "<tr class=\"dark\">\n";
5406                 } else {
5407                         print "<tr class=\"light\">\n";
5408                 }
5409                 $alternate ^= 1;
5410                 if (defined $tag{'age'}) {
5411                         print "<td><i>$tag{'age'}</i></td>\n";
5412                 } else {
5413                         print "<td></td>\n";
5414                 }
5415                 print "<td>" .
5416                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5417                                -class => "list name"}, esc_html($tag{'name'})) .
5418                       "</td>\n" .
5419                       "<td>";
5420                 if (defined $comment) {
5421                         print format_subject_html($comment, $comment_short,
5422                                                   href(action=>"tag", hash=>$tag{'id'}));
5423                 }
5424                 print "</td>\n" .
5425                       "<td class=\"selflink\">";
5426                 if ($tag{'type'} eq "tag") {
5427                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5428                 } else {
5429                         print "&nbsp;";
5430                 }
5431                 print "</td>\n" .
5432                       "<td class=\"link\">" . " | " .
5433                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5434                 if ($tag{'reftype'} eq "commit") {
5435                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5436                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5437                 } elsif ($tag{'reftype'} eq "blob") {
5438                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5439                 }
5440                 print "</td>\n" .
5441                       "</tr>";
5442         }
5443         if (defined $extra) {
5444                 print "<tr>\n" .
5445                       "<td colspan=\"5\">$extra</td>\n" .
5446                       "</tr>\n";
5447         }
5448         print "</table>\n";
5449 }
5450
5451 sub git_heads_body {
5452         # uses global variable $project
5453         my ($headlist, $head, $from, $to, $extra) = @_;
5454         $from = 0 unless defined $from;
5455         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5456
5457         print "<table class=\"heads\">\n";
5458         my $alternate = 1;
5459         for (my $i = $from; $i <= $to; $i++) {
5460                 my $entry = $headlist->[$i];
5461                 my %ref = %$entry;
5462                 my $curr = $ref{'id'} eq $head;
5463                 if ($alternate) {
5464                         print "<tr class=\"dark\">\n";
5465                 } else {
5466                         print "<tr class=\"light\">\n";
5467                 }
5468                 $alternate ^= 1;
5469                 print "<td><i>$ref{'age'}</i></td>\n" .
5470                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5471                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5472                                -class => "list name"},esc_html($ref{'name'})) .
5473                       "</td>\n" .
5474                       "<td class=\"link\">" .
5475                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5476                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5477                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5478                       "</td>\n" .
5479                       "</tr>";
5480         }
5481         if (defined $extra) {
5482                 print "<tr>\n" .
5483                       "<td colspan=\"3\">$extra</td>\n" .
5484                       "</tr>\n";
5485         }
5486         print "</table>\n";
5487 }
5488
5489 # Display a single remote block
5490 sub git_remote_block {
5491         my ($remote, $rdata, $limit, $head) = @_;
5492
5493         my $heads = $rdata->{'heads'};
5494         my $fetch = $rdata->{'fetch'};
5495         my $push = $rdata->{'push'};
5496
5497         my $urls_table = "<table class=\"projects_list\">\n" ;
5498
5499         if (defined $fetch) {
5500                 if ($fetch eq $push) {
5501                         $urls_table .= format_repo_url("URL", $fetch);
5502                 } else {
5503                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5504                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5505                 }
5506         } elsif (defined $push) {
5507                 $urls_table .= format_repo_url("Push URL", $push);
5508         } else {
5509                 $urls_table .= format_repo_url("", "No remote URL");
5510         }
5511
5512         $urls_table .= "</table>\n";
5513
5514         my $dots;
5515         if (defined $limit && $limit < @$heads) {
5516                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5517         }
5518
5519         print $urls_table;
5520         git_heads_body($heads, $head, 0, $limit, $dots);
5521 }
5522
5523 # Display a list of remote names with the respective fetch and push URLs
5524 sub git_remotes_list {
5525         my ($remotedata, $limit) = @_;
5526         print "<table class=\"heads\">\n";
5527         my $alternate = 1;
5528         my @remotes = sort keys %$remotedata;
5529
5530         my $limited = $limit && $limit < @remotes;
5531
5532         $#remotes = $limit - 1 if $limited;
5533
5534         while (my $remote = shift @remotes) {
5535                 my $rdata = $remotedata->{$remote};
5536                 my $fetch = $rdata->{'fetch'};
5537                 my $push = $rdata->{'push'};
5538                 if ($alternate) {
5539                         print "<tr class=\"dark\">\n";
5540                 } else {
5541                         print "<tr class=\"light\">\n";
5542                 }
5543                 $alternate ^= 1;
5544                 print "<td>" .
5545                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5546                                -class=> "list name"},esc_html($remote)) .
5547                       "</td>";
5548                 print "<td class=\"link\">" .
5549                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5550                       " | " .
5551                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5552                       "</td>";
5553
5554                 print "</tr>\n";
5555         }
5556
5557         if ($limited) {
5558                 print "<tr>\n" .
5559                       "<td colspan=\"3\">" .
5560                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5561                       "</td>\n" . "</tr>\n";
5562         }
5563
5564         print "</table>";
5565 }
5566
5567 # Display remote heads grouped by remote, unless there are too many
5568 # remotes, in which case we only display the remote names
5569 sub git_remotes_body {
5570         my ($remotedata, $limit, $head) = @_;
5571         if ($limit and $limit < keys %$remotedata) {
5572                 git_remotes_list($remotedata, $limit);
5573         } else {
5574                 fill_remote_heads($remotedata);
5575                 while (my ($remote, $rdata) = each %$remotedata) {
5576                         git_print_section({-class=>"remote", -id=>$remote},
5577                                 ["remotes", $remote, $remote], sub {
5578                                         git_remote_block($remote, $rdata, $limit, $head);
5579                                 });
5580                 }
5581         }
5582 }
5583
5584 sub git_search_message {
5585         my %co = @_;
5586
5587         my $greptype;
5588         if ($searchtype eq 'commit') {
5589                 $greptype = "--grep=";
5590         } elsif ($searchtype eq 'author') {
5591                 $greptype = "--author=";
5592         } elsif ($searchtype eq 'committer') {
5593                 $greptype = "--committer=";
5594         }
5595         $greptype .= $searchtext;
5596         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5597                                        $greptype, '--regexp-ignore-case',
5598                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5599
5600         my $paging_nav = '';
5601         if ($page > 0) {
5602                 $paging_nav .=
5603                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5604                                 "first") .
5605                         " &sdot; " .
5606                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5607                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5608         } else {
5609                 $paging_nav .= "first &sdot; prev";
5610         }
5611         my $next_link = '';
5612         if ($#commitlist >= 100) {
5613                 $next_link =
5614                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5615                                  -accesskey => "n", -title => "Alt-n"}, "next");
5616                 $paging_nav .= " &sdot; $next_link";
5617         } else {
5618                 $paging_nav .= " &sdot; next";
5619         }
5620
5621         git_header_html();
5622
5623         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5624         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5625         if ($page == 0 && !@commitlist) {
5626                 print "<p>No match.</p>\n";
5627         } else {
5628                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5629         }
5630
5631         git_footer_html();
5632 }
5633
5634 sub git_search_changes {
5635         my %co = @_;
5636
5637         local $/ = "\n";
5638         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5639                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5640                 ($search_use_regexp ? '--pickaxe-regex' : ())
5641                         or die_error(500, "Open git-log failed");
5642
5643         git_header_html();
5644
5645         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5646         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5647
5648         print "<table class=\"pickaxe search\">\n";
5649         my $alternate = 1;
5650         undef %co;
5651         my @files;
5652         while (my $line = <$fd>) {
5653                 chomp $line;
5654                 next unless $line;
5655
5656                 my %set = parse_difftree_raw_line($line);
5657                 if (defined $set{'commit'}) {
5658                         # finish previous commit
5659                         if (%co) {
5660                                 print "</td>\n" .
5661                                       "<td class=\"link\">" .
5662                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5663                                               "commit") .
5664                                       " | " .
5665                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5666                                                              hash_base=>$co{'id'})},
5667                                               "tree") .
5668                                       "</td>\n" .
5669                                       "</tr>\n";
5670                         }
5671
5672                         if ($alternate) {
5673                                 print "<tr class=\"dark\">\n";
5674                         } else {
5675                                 print "<tr class=\"light\">\n";
5676                         }
5677                         $alternate ^= 1;
5678                         %co = parse_commit($set{'commit'});
5679                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5680                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5681                               "<td><i>$author</i></td>\n" .
5682                               "<td>" .
5683                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5684                                       -class => "list subject"},
5685                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5686                 } elsif (defined $set{'to_id'}) {
5687                         next if ($set{'to_id'} =~ m/^0{40}$/);
5688
5689                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5690                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5691                                       -class => "list"},
5692                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5693                               "<br/>\n";
5694                 }
5695         }
5696         close $fd;
5697
5698         # finish last commit (warning: repetition!)
5699         if (%co) {
5700                 print "</td>\n" .
5701                       "<td class=\"link\">" .
5702                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5703                               "commit") .
5704                       " | " .
5705                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5706                                              hash_base=>$co{'id'})},
5707                               "tree") .
5708                       "</td>\n" .
5709                       "</tr>\n";
5710         }
5711
5712         print "</table>\n";
5713
5714         git_footer_html();
5715 }
5716
5717 sub git_search_files {
5718         my %co = @_;
5719
5720         local $/ = "\n";
5721         open my $fd, "-|", git_cmd(), 'grep', '-n',
5722                 $search_use_regexp ? ('-E', '-i') : '-F',
5723                 $searchtext, $co{'tree'}
5724                         or die_error(500, "Open git-grep failed");
5725
5726         git_header_html();
5727
5728         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5729         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5730
5731         print "<table class=\"grep_search\">\n";
5732         my $alternate = 1;
5733         my $matches = 0;
5734         my $lastfile = '';
5735         while (my $line = <$fd>) {
5736                 chomp $line;
5737                 my ($file, $lno, $ltext, $binary);
5738                 last if ($matches++ > 1000);
5739                 if ($line =~ /^Binary file (.+) matches$/) {
5740                         $file = $1;
5741                         $binary = 1;
5742                 } else {
5743                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5744                 }
5745                 if ($file ne $lastfile) {
5746                         $lastfile and print "</td></tr>\n";
5747                         if ($alternate++) {
5748                                 print "<tr class=\"dark\">\n";
5749                         } else {
5750                                 print "<tr class=\"light\">\n";
5751                         }
5752                         print "<td class=\"list\">".
5753                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5754                                                        file_name=>"$file"),
5755                                         -class => "list"}, esc_path($file));
5756                         print "</td><td>\n";
5757                         $lastfile = $file;
5758                 }
5759                 if ($binary) {
5760                         print "<div class=\"binary\">Binary file</div>\n";
5761                 } else {
5762                         $ltext = untabify($ltext);
5763                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5764                                 $ltext = esc_html($1, -nbsp=>1);
5765                                 $ltext .= '<span class="match">';
5766                                 $ltext .= esc_html($2, -nbsp=>1);
5767                                 $ltext .= '</span>';
5768                                 $ltext .= esc_html($3, -nbsp=>1);
5769                         } else {
5770                                 $ltext = esc_html($ltext, -nbsp=>1);
5771                         }
5772                         print "<div class=\"pre\">" .
5773                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5774                                                        file_name=>"$file").'#l'.$lno,
5775                                         -class => "linenr"}, sprintf('%4i', $lno))
5776                                 . ' ' .  $ltext . "</div>\n";
5777                 }
5778         }
5779         if ($lastfile) {
5780                 print "</td></tr>\n";
5781                 if ($matches > 1000) {
5782                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5783                 }
5784         } else {
5785                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5786         }
5787         close $fd;
5788
5789         print "</table>\n";
5790
5791         git_footer_html();
5792 }
5793
5794 sub git_search_grep_body {
5795         my ($commitlist, $from, $to, $extra) = @_;
5796         $from = 0 unless defined $from;
5797         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5798
5799         print "<table class=\"commit_search\">\n";
5800         my $alternate = 1;
5801         for (my $i = $from; $i <= $to; $i++) {
5802                 my %co = %{$commitlist->[$i]};
5803                 if (!%co) {
5804                         next;
5805                 }
5806                 my $commit = $co{'id'};
5807                 if ($alternate) {
5808                         print "<tr class=\"dark\">\n";
5809                 } else {
5810                         print "<tr class=\"light\">\n";
5811                 }
5812                 $alternate ^= 1;
5813                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5814                       format_author_html('td', \%co, 15, 5) .
5815                       "<td>" .
5816                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5817                                -class => "list subject"},
5818                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5819                 my $comment = $co{'comment'};
5820                 foreach my $line (@$comment) {
5821                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5822                                 my ($lead, $match, $trail) = ($1, $2, $3);
5823                                 $match = chop_str($match, 70, 5, 'center');
5824                                 my $contextlen = int((80 - length($match))/2);
5825                                 $contextlen = 30 if ($contextlen > 30);
5826                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5827                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5828
5829                                 $lead  = esc_html($lead);
5830                                 $match = esc_html($match);
5831                                 $trail = esc_html($trail);
5832
5833                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5834                         }
5835                 }
5836                 print "</td>\n" .
5837                       "<td class=\"link\">" .
5838                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5839                       " | " .
5840                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5841                       " | " .
5842                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5843                 print "</td>\n" .
5844                       "</tr>\n";
5845         }
5846         if (defined $extra) {
5847                 print "<tr>\n" .
5848                       "<td colspan=\"3\">$extra</td>\n" .
5849                       "</tr>\n";
5850         }
5851         print "</table>\n";
5852 }
5853
5854 ## ======================================================================
5855 ## ======================================================================
5856 ## actions
5857
5858 sub git_project_list {
5859         my $order = $input_params{'order'};
5860         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5861                 die_error(400, "Unknown order parameter");
5862         }
5863
5864         my @list = git_get_projects_list();
5865         if (!@list) {
5866                 die_error(404, "No projects found");
5867         }
5868
5869         git_header_html();
5870         if (defined $home_text && -f $home_text) {
5871                 print "<div class=\"index_include\">\n";
5872                 insert_file($home_text);
5873                 print "</div>\n";
5874         }
5875         print $cgi->startform(-method => "get") .
5876               "<p class=\"projsearch\">Search:\n" .
5877               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5878               "</p>" .
5879               $cgi->end_form() . "\n";
5880         git_project_list_body(\@list, $order);
5881         git_footer_html();
5882 }
5883
5884 sub git_forks {
5885         my $order = $input_params{'order'};
5886         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5887                 die_error(400, "Unknown order parameter");
5888         }
5889
5890         my @list = git_get_projects_list($project);
5891         if (!@list) {
5892                 die_error(404, "No forks found");
5893         }
5894
5895         git_header_html();
5896         git_print_page_nav('','');
5897         git_print_header_div('summary', "$project forks");
5898         git_project_list_body(\@list, $order);
5899         git_footer_html();
5900 }
5901
5902 sub git_project_index {
5903         my @projects = git_get_projects_list();
5904         if (!@projects) {
5905                 die_error(404, "No projects found");
5906         }
5907
5908         print $cgi->header(
5909                 -type => 'text/plain',
5910                 -charset => 'utf-8',
5911                 -content_disposition => 'inline; filename="index.aux"');
5912
5913         foreach my $pr (@projects) {
5914                 if (!exists $pr->{'owner'}) {
5915                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5916                 }
5917
5918                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5919                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5920                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5921                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5922                 $path  =~ s/ /\+/g;
5923                 $owner =~ s/ /\+/g;
5924
5925                 print "$path $owner\n";
5926         }
5927 }
5928
5929 sub git_summary {
5930         my $descr = git_get_project_description($project) || "none";
5931         my %co = parse_commit("HEAD");
5932         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5933         my $head = $co{'id'};
5934         my $remote_heads = gitweb_check_feature('remote_heads');
5935
5936         my $owner = git_get_project_owner($project);
5937
5938         my $refs = git_get_references();
5939         # These get_*_list functions return one more to allow us to see if
5940         # there are more ...
5941         my @taglist  = git_get_tags_list(16);
5942         my @headlist = git_get_heads_list(16);
5943         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5944         my @forklist;
5945         my $check_forks = gitweb_check_feature('forks');
5946
5947         if ($check_forks) {
5948                 # find forks of a project
5949                 @forklist = git_get_projects_list($project);
5950                 # filter out forks of forks
5951                 @forklist = filter_forks_from_projects_list(\@forklist)
5952                         if (@forklist);
5953         }
5954
5955         git_header_html();
5956         git_print_page_nav('summary','', $head);
5957
5958         print "<div class=\"title\">&nbsp;</div>\n";
5959         print "<table class=\"projects_list\">\n" .
5960               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5961               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5962         if (defined $cd{'rfc2822'}) {
5963                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5964                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5965         }
5966
5967         # use per project git URL list in $projectroot/$project/cloneurl
5968         # or make project git URL from git base URL and project name
5969         my $url_tag = "URL";
5970         my @url_list = git_get_project_url_list($project);
5971         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5972         foreach my $git_url (@url_list) {
5973                 next unless $git_url;
5974                 print format_repo_url($url_tag, $git_url);
5975                 $url_tag = "";
5976         }
5977
5978         # Tag cloud
5979         my $show_ctags = gitweb_check_feature('ctags');
5980         if ($show_ctags) {
5981                 my $ctags = git_get_project_ctags($project);
5982                 if (%$ctags) {
5983                         # without ability to add tags, don't show if there are none
5984                         my $cloud = git_populate_project_tagcloud($ctags);
5985                         print "<tr id=\"metadata_ctags\">" .
5986                               "<td>content tags</td>" .
5987                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5988                               "</tr>\n";
5989                 }
5990         }
5991
5992         print "</table>\n";
5993
5994         # If XSS prevention is on, we don't include README.html.
5995         # TODO: Allow a readme in some safe format.
5996         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5997                 print "<div class=\"title\">readme</div>\n" .
5998                       "<div class=\"readme\">\n";
5999                 insert_file("$projectroot/$project/README.html");
6000                 print "\n</div>\n"; # class="readme"
6001         }
6002
6003         # we need to request one more than 16 (0..15) to check if
6004         # those 16 are all
6005         my @commitlist = $head ? parse_commits($head, 17) : ();
6006         if (@commitlist) {
6007                 git_print_header_div('shortlog');
6008                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6009                                   $#commitlist <=  15 ? undef :
6010                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6011         }
6012
6013         if (@taglist) {
6014                 git_print_header_div('tags');
6015                 git_tags_body(\@taglist, 0, 15,
6016                               $#taglist <=  15 ? undef :
6017                               $cgi->a({-href => href(action=>"tags")}, "..."));
6018         }
6019
6020         if (@headlist) {
6021                 git_print_header_div('heads');
6022                 git_heads_body(\@headlist, $head, 0, 15,
6023                                $#headlist <= 15 ? undef :
6024                                $cgi->a({-href => href(action=>"heads")}, "..."));
6025         }
6026
6027         if (%remotedata) {
6028                 git_print_header_div('remotes');
6029                 git_remotes_body(\%remotedata, 15, $head);
6030         }
6031
6032         if (@forklist) {
6033                 git_print_header_div('forks');
6034                 git_project_list_body(\@forklist, 'age', 0, 15,
6035                                       $#forklist <= 15 ? undef :
6036                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6037                                       'no_header');
6038         }
6039
6040         git_footer_html();
6041 }
6042
6043 sub git_tag {
6044         my %tag = parse_tag($hash);
6045
6046         if (! %tag) {
6047                 die_error(404, "Unknown tag object");
6048         }
6049
6050         my $head = git_get_head_hash($project);
6051         git_header_html();
6052         git_print_page_nav('','', $head,undef,$head);
6053         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6054         print "<div class=\"title_text\">\n" .
6055               "<table class=\"object_header\">\n" .
6056               "<tr>\n" .
6057               "<td>object</td>\n" .
6058               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6059                                $tag{'object'}) . "</td>\n" .
6060               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6061                                               $tag{'type'}) . "</td>\n" .
6062               "</tr>\n";
6063         if (defined($tag{'author'})) {
6064                 git_print_authorship_rows(\%tag, 'author');
6065         }
6066         print "</table>\n\n" .
6067               "</div>\n";
6068         print "<div class=\"page_body\">";
6069         my $comment = $tag{'comment'};
6070         foreach my $line (@$comment) {
6071                 chomp $line;
6072                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6073         }
6074         print "</div>\n";
6075         git_footer_html();
6076 }
6077
6078 sub git_blame_common {
6079         my $format = shift || 'porcelain';
6080         if ($format eq 'porcelain' && $cgi->param('js')) {
6081                 $format = 'incremental';
6082                 $action = 'blame_incremental'; # for page title etc
6083         }
6084
6085         # permissions
6086         gitweb_check_feature('blame')
6087                 or die_error(403, "Blame view not allowed");
6088
6089         # error checking
6090         die_error(400, "No file name given") unless $file_name;
6091         $hash_base ||= git_get_head_hash($project);
6092         die_error(404, "Couldn't find base commit") unless $hash_base;
6093         my %co = parse_commit($hash_base)
6094                 or die_error(404, "Commit not found");
6095         my $ftype = "blob";
6096         if (!defined $hash) {
6097                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6098                         or die_error(404, "Error looking up file");
6099         } else {
6100                 $ftype = git_get_type($hash);
6101                 if ($ftype !~ "blob") {
6102                         die_error(400, "Object is not a blob");
6103                 }
6104         }
6105
6106         my $fd;
6107         if ($format eq 'incremental') {
6108                 # get file contents (as base)
6109                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6110                         or die_error(500, "Open git-cat-file failed");
6111         } elsif ($format eq 'data') {
6112                 # run git-blame --incremental
6113                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6114                         $hash_base, "--", $file_name
6115                         or die_error(500, "Open git-blame --incremental failed");
6116         } else {
6117                 # run git-blame --porcelain
6118                 open $fd, "-|", git_cmd(), "blame", '-p',
6119                         $hash_base, '--', $file_name
6120                         or die_error(500, "Open git-blame --porcelain failed");
6121         }
6122
6123         # incremental blame data returns early
6124         if ($format eq 'data') {
6125                 print $cgi->header(
6126                         -type=>"text/plain", -charset => "utf-8",
6127                         -status=> "200 OK");
6128                 local $| = 1; # output autoflush
6129                 print while <$fd>;
6130                 close $fd
6131                         or print "ERROR $!\n";
6132
6133                 print 'END';
6134                 if (defined $t0 && gitweb_check_feature('timed')) {
6135                         print ' '.
6136                               tv_interval($t0, [ gettimeofday() ]).
6137                               ' '.$number_of_git_cmds;
6138                 }
6139                 print "\n";
6140
6141                 return;
6142         }
6143
6144         # page header
6145         git_header_html();
6146         my $formats_nav =
6147                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6148                         "blob") .
6149                 " | ";
6150         if ($format eq 'incremental') {
6151                 $formats_nav .=
6152                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6153                                 "blame") . " (non-incremental)";
6154         } else {
6155                 $formats_nav .=
6156                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6157                                 "blame") . " (incremental)";
6158         }
6159         $formats_nav .=
6160                 " | " .
6161                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6162                         "history") .
6163                 " | " .
6164                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6165                         "HEAD");
6166         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6167         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6168         git_print_page_path($file_name, $ftype, $hash_base);
6169
6170         # page body
6171         if ($format eq 'incremental') {
6172                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6173                       "This page requires JavaScript to run.\n Use ".
6174                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6175                               'this page').
6176                       " instead.\n".
6177                       "</b></center></div>\n</noscript>\n";
6178
6179                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6180         }
6181
6182         print qq!<div class="page_body">\n!;
6183         print qq!<div id="progress_info">... / ...</div>\n!
6184                 if ($format eq 'incremental');
6185         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6186               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6187               qq!<thead>\n!.
6188               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6189               qq!</thead>\n!.
6190               qq!<tbody>\n!;
6191
6192         my @rev_color = qw(light dark);
6193         my $num_colors = scalar(@rev_color);
6194         my $current_color = 0;
6195
6196         if ($format eq 'incremental') {
6197                 my $color_class = $rev_color[$current_color];
6198
6199                 #contents of a file
6200                 my $linenr = 0;
6201         LINE:
6202                 while (my $line = <$fd>) {
6203                         chomp $line;
6204                         $linenr++;
6205
6206                         print qq!<tr id="l$linenr" class="$color_class">!.
6207                               qq!<td class="sha1"><a href=""> </a></td>!.
6208                               qq!<td class="linenr">!.
6209                               qq!<a class="linenr" href="">$linenr</a></td>!;
6210                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6211                         print qq!</tr>\n!;
6212                 }
6213
6214         } else { # porcelain, i.e. ordinary blame
6215                 my %metainfo = (); # saves information about commits
6216
6217                 # blame data
6218         LINE:
6219                 while (my $line = <$fd>) {
6220                         chomp $line;
6221                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6222                         # no <lines in group> for subsequent lines in group of lines
6223                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6224                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6225                         if (!exists $metainfo{$full_rev}) {
6226                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6227                         }
6228                         my $meta = $metainfo{$full_rev};
6229                         my $data;
6230                         while ($data = <$fd>) {
6231                                 chomp $data;
6232                                 last if ($data =~ s/^\t//); # contents of line
6233                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6234                                         $meta->{$1} = $2 unless exists $meta->{$1};
6235                                 }
6236                                 if ($data =~ /^previous /) {
6237                                         $meta->{'nprevious'}++;
6238                                 }
6239                         }
6240                         my $short_rev = substr($full_rev, 0, 8);
6241                         my $author = $meta->{'author'};
6242                         my %date =
6243                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6244                         my $date = $date{'iso-tz'};
6245                         if ($group_size) {
6246                                 $current_color = ($current_color + 1) % $num_colors;
6247                         }
6248                         my $tr_class = $rev_color[$current_color];
6249                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6250                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6251                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6252                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6253                         if ($group_size) {
6254                                 print "<td class=\"sha1\"";
6255                                 print " title=\"". esc_html($author) . ", $date\"";
6256                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6257                                 print ">";
6258                                 print $cgi->a({-href => href(action=>"commit",
6259                                                              hash=>$full_rev,
6260                                                              file_name=>$file_name)},
6261                                               esc_html($short_rev));
6262                                 if ($group_size >= 2) {
6263                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6264                                         if (@author_initials) {
6265                                                 print "<br />" .
6266                                                       esc_html(join('', @author_initials));
6267                                                 #           or join('.', ...)
6268                                         }
6269                                 }
6270                                 print "</td>\n";
6271                         }
6272                         # 'previous' <sha1 of parent commit> <filename at commit>
6273                         if (exists $meta->{'previous'} &&
6274                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6275                                 $meta->{'parent'} = $1;
6276                                 $meta->{'file_parent'} = unquote($2);
6277                         }
6278                         my $linenr_commit =
6279                                 exists($meta->{'parent'}) ?
6280                                 $meta->{'parent'} : $full_rev;
6281                         my $linenr_filename =
6282                                 exists($meta->{'file_parent'}) ?
6283                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6284                         my $blamed = href(action => 'blame',
6285                                           file_name => $linenr_filename,
6286                                           hash_base => $linenr_commit);
6287                         print "<td class=\"linenr\">";
6288                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6289                                         -class => "linenr" },
6290                                       esc_html($lineno));
6291                         print "</td>";
6292                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6293                         print "</tr>\n";
6294                 } # end while
6295
6296         }
6297
6298         # footer
6299         print "</tbody>\n".
6300               "</table>\n"; # class="blame"
6301         print "</div>\n";   # class="blame_body"
6302         close $fd
6303                 or print "Reading blob failed\n";
6304
6305         git_footer_html();
6306 }
6307
6308 sub git_blame {
6309         git_blame_common();
6310 }
6311
6312 sub git_blame_incremental {
6313         git_blame_common('incremental');
6314 }
6315
6316 sub git_blame_data {
6317         git_blame_common('data');
6318 }
6319
6320 sub git_tags {
6321         my $head = git_get_head_hash($project);
6322         git_header_html();
6323         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6324         git_print_header_div('summary', $project);
6325
6326         my @tagslist = git_get_tags_list();
6327         if (@tagslist) {
6328                 git_tags_body(\@tagslist);
6329         }
6330         git_footer_html();
6331 }
6332
6333 sub git_heads {
6334         my $head = git_get_head_hash($project);
6335         git_header_html();
6336         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6337         git_print_header_div('summary', $project);
6338
6339         my @headslist = git_get_heads_list();
6340         if (@headslist) {
6341                 git_heads_body(\@headslist, $head);
6342         }
6343         git_footer_html();
6344 }
6345
6346 # used both for single remote view and for list of all the remotes
6347 sub git_remotes {
6348         gitweb_check_feature('remote_heads')
6349                 or die_error(403, "Remote heads view is disabled");
6350
6351         my $head = git_get_head_hash($project);
6352         my $remote = $input_params{'hash'};
6353
6354         my $remotedata = git_get_remotes_list($remote);
6355         die_error(500, "Unable to get remote information") unless defined $remotedata;
6356
6357         unless (%$remotedata) {
6358                 die_error(404, defined $remote ?
6359                         "Remote $remote not found" :
6360                         "No remotes found");
6361         }
6362
6363         git_header_html(undef, undef, -action_extra => $remote);
6364         git_print_page_nav('', '',  $head, undef, $head,
6365                 format_ref_views($remote ? '' : 'remotes'));
6366
6367         fill_remote_heads($remotedata);
6368         if (defined $remote) {
6369                 git_print_header_div('remotes', "$remote remote for $project");
6370                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6371         } else {
6372                 git_print_header_div('summary', "$project remotes");
6373                 git_remotes_body($remotedata, undef, $head);
6374         }
6375
6376         git_footer_html();
6377 }
6378
6379 sub git_blob_plain {
6380         my $type = shift;
6381         my $expires;
6382
6383         if (!defined $hash) {
6384                 if (defined $file_name) {
6385                         my $base = $hash_base || git_get_head_hash($project);
6386                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6387                                 or die_error(404, "Cannot find file");
6388                 } else {
6389                         die_error(400, "No file name defined");
6390                 }
6391         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6392                 # blobs defined by non-textual hash id's can be cached
6393                 $expires = "+1d";
6394         }
6395
6396         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6397                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6398
6399         # content-type (can include charset)
6400         $type = blob_contenttype($fd, $file_name, $type);
6401
6402         # "save as" filename, even when no $file_name is given
6403         my $save_as = "$hash";
6404         if (defined $file_name) {
6405                 $save_as = $file_name;
6406         } elsif ($type =~ m/^text\//) {
6407                 $save_as .= '.txt';
6408         }
6409
6410         # With XSS prevention on, blobs of all types except a few known safe
6411         # ones are served with "Content-Disposition: attachment" to make sure
6412         # they don't run in our security domain.  For certain image types,
6413         # blob view writes an <img> tag referring to blob_plain view, and we
6414         # want to be sure not to break that by serving the image as an
6415         # attachment (though Firefox 3 doesn't seem to care).
6416         my $sandbox = $prevent_xss &&
6417                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6418
6419         # serve text/* as text/plain
6420         if ($prevent_xss &&
6421             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6422              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6423                 my $rest = $1;
6424                 $rest = defined $rest ? $rest : '';
6425                 $type = "text/plain$rest";
6426         }
6427
6428         print $cgi->header(
6429                 -type => $type,
6430                 -expires => $expires,
6431                 -content_disposition =>
6432                         ($sandbox ? 'attachment' : 'inline')
6433                         . '; filename="' . $save_as . '"');
6434         local $/ = undef;
6435         binmode STDOUT, ':raw';
6436         print <$fd>;
6437         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6438         close $fd;
6439 }
6440
6441 sub git_blob {
6442         my $expires;
6443
6444         if (!defined $hash) {
6445                 if (defined $file_name) {
6446                         my $base = $hash_base || git_get_head_hash($project);
6447                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6448                                 or die_error(404, "Cannot find file");
6449                 } else {
6450                         die_error(400, "No file name defined");
6451                 }
6452         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6453                 # blobs defined by non-textual hash id's can be cached
6454                 $expires = "+1d";
6455         }
6456
6457         my $have_blame = gitweb_check_feature('blame');
6458         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6459                 or die_error(500, "Couldn't cat $file_name, $hash");
6460         my $mimetype = blob_mimetype($fd, $file_name);
6461         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6462         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6463                 close $fd;
6464                 return git_blob_plain($mimetype);
6465         }
6466         # we can have blame only for text/* mimetype
6467         $have_blame &&= ($mimetype =~ m!^text/!);
6468
6469         my $highlight = gitweb_check_feature('highlight');
6470         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6471         $fd = run_highlighter($fd, $highlight, $syntax)
6472                 if $syntax;
6473
6474         git_header_html(undef, $expires);
6475         my $formats_nav = '';
6476         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6477                 if (defined $file_name) {
6478                         if ($have_blame) {
6479                                 $formats_nav .=
6480                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6481                                                 "blame") .
6482                                         " | ";
6483                         }
6484                         $formats_nav .=
6485                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6486                                         "history") .
6487                                 " | " .
6488                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6489                                         "raw") .
6490                                 " | " .
6491                                 $cgi->a({-href => href(action=>"blob",
6492                                                        hash_base=>"HEAD", file_name=>$file_name)},
6493                                         "HEAD");
6494                 } else {
6495                         $formats_nav .=
6496                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6497                                         "raw");
6498                 }
6499                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6500                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6501         } else {
6502                 print "<div class=\"page_nav\">\n" .
6503                       "<br/><br/></div>\n" .
6504                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6505         }
6506         git_print_page_path($file_name, "blob", $hash_base);
6507         print "<div class=\"page_body\">\n";
6508         if ($mimetype =~ m!^image/!) {
6509                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6510                 if ($file_name) {
6511                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6512                 }
6513                 print qq! src="! .
6514                       href(action=>"blob_plain", hash=>$hash,
6515                            hash_base=>$hash_base, file_name=>$file_name) .
6516                       qq!" />\n!;
6517         } else {
6518                 my $nr;
6519                 while (my $line = <$fd>) {
6520                         chomp $line;
6521                         $nr++;
6522                         $line = untabify($line);
6523                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6524                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6525                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6526                 }
6527         }
6528         close $fd
6529                 or print "Reading blob failed.\n";
6530         print "</div>";
6531         git_footer_html();
6532 }
6533
6534 sub git_tree {
6535         if (!defined $hash_base) {
6536                 $hash_base = "HEAD";
6537         }
6538         if (!defined $hash) {
6539                 if (defined $file_name) {
6540                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6541                 } else {
6542                         $hash = $hash_base;
6543                 }
6544         }
6545         die_error(404, "No such tree") unless defined($hash);
6546
6547         my $show_sizes = gitweb_check_feature('show-sizes');
6548         my $have_blame = gitweb_check_feature('blame');
6549
6550         my @entries = ();
6551         {
6552                 local $/ = "\0";
6553                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6554                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6555                         or die_error(500, "Open git-ls-tree failed");
6556                 @entries = map { chomp; $_ } <$fd>;
6557                 close $fd
6558                         or die_error(404, "Reading tree failed");
6559         }
6560
6561         my $refs = git_get_references();
6562         my $ref = format_ref_marker($refs, $hash_base);
6563         git_header_html();
6564         my $basedir = '';
6565         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6566                 my @views_nav = ();
6567                 if (defined $file_name) {
6568                         push @views_nav,
6569                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6570                                         "history"),
6571                                 $cgi->a({-href => href(action=>"tree",
6572                                                        hash_base=>"HEAD", file_name=>$file_name)},
6573                                         "HEAD"),
6574                 }
6575                 my $snapshot_links = format_snapshot_links($hash);
6576                 if (defined $snapshot_links) {
6577                         # FIXME: Should be available when we have no hash base as well.
6578                         push @views_nav, $snapshot_links;
6579                 }
6580                 git_print_page_nav('tree','', $hash_base, undef, undef,
6581                                    join(' | ', @views_nav));
6582                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6583         } else {
6584                 undef $hash_base;
6585                 print "<div class=\"page_nav\">\n";
6586                 print "<br/><br/></div>\n";
6587                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6588         }
6589         if (defined $file_name) {
6590                 $basedir = $file_name;
6591                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6592                         $basedir .= '/';
6593                 }
6594                 git_print_page_path($file_name, 'tree', $hash_base);
6595         }
6596         print "<div class=\"page_body\">\n";
6597         print "<table class=\"tree\">\n";
6598         my $alternate = 1;
6599         # '..' (top directory) link if possible
6600         if (defined $hash_base &&
6601             defined $file_name && $file_name =~ m![^/]+$!) {
6602                 if ($alternate) {
6603                         print "<tr class=\"dark\">\n";
6604                 } else {
6605                         print "<tr class=\"light\">\n";
6606                 }
6607                 $alternate ^= 1;
6608
6609                 my $up = $file_name;
6610                 $up =~ s!/?[^/]+$!!;
6611                 undef $up unless $up;
6612                 # based on git_print_tree_entry
6613                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6614                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6615                 print '<td class="list">';
6616                 print $cgi->a({-href => href(action=>"tree",
6617                                              hash_base=>$hash_base,
6618                                              file_name=>$up)},
6619                               "..");
6620                 print "</td>\n";
6621                 print "<td class=\"link\"></td>\n";
6622
6623                 print "</tr>\n";
6624         }
6625         foreach my $line (@entries) {
6626                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6627
6628                 if ($alternate) {
6629                         print "<tr class=\"dark\">\n";
6630                 } else {
6631                         print "<tr class=\"light\">\n";
6632                 }
6633                 $alternate ^= 1;
6634
6635                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6636
6637                 print "</tr>\n";
6638         }
6639         print "</table>\n" .
6640               "</div>";
6641         git_footer_html();
6642 }
6643
6644 sub snapshot_name {
6645         my ($project, $hash) = @_;
6646
6647         # path/to/project.git  -> project
6648         # path/to/project/.git -> project
6649         my $name = to_utf8($project);
6650         $name =~ s,([^/])/*\.git$,$1,;
6651         $name = basename($name);
6652         # sanitize name
6653         $name =~ s/[[:cntrl:]]/?/g;
6654
6655         my $ver = $hash;
6656         if ($hash =~ /^[0-9a-fA-F]+$/) {
6657                 # shorten SHA-1 hash
6658                 my $full_hash = git_get_full_hash($project, $hash);
6659                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6660                         $ver = git_get_short_hash($project, $hash);
6661                 }
6662         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6663                 # tags don't need shortened SHA-1 hash
6664                 $ver = $1;
6665         } else {
6666                 # branches and other need shortened SHA-1 hash
6667                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6668                         $ver = $1;
6669                 }
6670                 $ver .= '-' . git_get_short_hash($project, $hash);
6671         }
6672         # in case of hierarchical branch names
6673         $ver =~ s!/!.!g;
6674
6675         # name = project-version_string
6676         $name = "$name-$ver";
6677
6678         return wantarray ? ($name, $name) : $name;
6679 }
6680
6681 sub git_snapshot {
6682         my $format = $input_params{'snapshot_format'};
6683         if (!@snapshot_fmts) {
6684                 die_error(403, "Snapshots not allowed");
6685         }
6686         # default to first supported snapshot format
6687         $format ||= $snapshot_fmts[0];
6688         if ($format !~ m/^[a-z0-9]+$/) {
6689                 die_error(400, "Invalid snapshot format parameter");
6690         } elsif (!exists($known_snapshot_formats{$format})) {
6691                 die_error(400, "Unknown snapshot format");
6692         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6693                 die_error(403, "Snapshot format not allowed");
6694         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6695                 die_error(403, "Unsupported snapshot format");
6696         }
6697
6698         my $type = git_get_type("$hash^{}");
6699         if (!$type) {
6700                 die_error(404, 'Object does not exist');
6701         }  elsif ($type eq 'blob') {
6702                 die_error(400, 'Object is not a tree-ish');
6703         }
6704
6705         my ($name, $prefix) = snapshot_name($project, $hash);
6706         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6707         my $cmd = quote_command(
6708                 git_cmd(), 'archive',
6709                 "--format=$known_snapshot_formats{$format}{'format'}",
6710                 "--prefix=$prefix/", $hash);
6711         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6712                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6713         }
6714
6715         $filename =~ s/(["\\])/\\$1/g;
6716         print $cgi->header(
6717                 -type => $known_snapshot_formats{$format}{'type'},
6718                 -content_disposition => 'inline; filename="' . $filename . '"',
6719                 -status => '200 OK');
6720
6721         open my $fd, "-|", $cmd
6722                 or die_error(500, "Execute git-archive failed");
6723         binmode STDOUT, ':raw';
6724         print <$fd>;
6725         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6726         close $fd;
6727 }
6728
6729 sub git_log_generic {
6730         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6731
6732         my $head = git_get_head_hash($project);
6733         if (!defined $base) {
6734                 $base = $head;
6735         }
6736         if (!defined $page) {
6737                 $page = 0;
6738         }
6739         my $refs = git_get_references();
6740
6741         my $commit_hash = $base;
6742         if (defined $parent) {
6743                 $commit_hash = "$parent..$base";
6744         }
6745         my @commitlist =
6746                 parse_commits($commit_hash, 101, (100 * $page),
6747                               defined $file_name ? ($file_name, "--full-history") : ());
6748
6749         my $ftype;
6750         if (!defined $file_hash && defined $file_name) {
6751                 # some commits could have deleted file in question,
6752                 # and not have it in tree, but one of them has to have it
6753                 for (my $i = 0; $i < @commitlist; $i++) {
6754                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6755                         last if defined $file_hash;
6756                 }
6757         }
6758         if (defined $file_hash) {
6759                 $ftype = git_get_type($file_hash);
6760         }
6761         if (defined $file_name && !defined $ftype) {
6762                 die_error(500, "Unknown type of object");
6763         }
6764         my %co;
6765         if (defined $file_name) {
6766                 %co = parse_commit($base)
6767                         or die_error(404, "Unknown commit object");
6768         }
6769
6770
6771         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6772         my $next_link = '';
6773         if ($#commitlist >= 100) {
6774                 $next_link =
6775                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6776                                  -accesskey => "n", -title => "Alt-n"}, "next");
6777         }
6778         my $patch_max = gitweb_get_feature('patches');
6779         if ($patch_max && !defined $file_name) {
6780                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6781                         $paging_nav .= " &sdot; " .
6782                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6783                                         "patches");
6784                 }
6785         }
6786
6787         git_header_html();
6788         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6789         if (defined $file_name) {
6790                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6791         } else {
6792                 git_print_header_div('summary', $project)
6793         }
6794         git_print_page_path($file_name, $ftype, $hash_base)
6795                 if (defined $file_name);
6796
6797         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6798                      $file_name, $file_hash, $ftype);
6799
6800         git_footer_html();
6801 }
6802
6803 sub git_log {
6804         git_log_generic('log', \&git_log_body,
6805                         $hash, $hash_parent);
6806 }
6807
6808 sub git_commit {
6809         $hash ||= $hash_base || "HEAD";
6810         my %co = parse_commit($hash)
6811             or die_error(404, "Unknown commit object");
6812
6813         my $parent  = $co{'parent'};
6814         my $parents = $co{'parents'}; # listref
6815
6816         # we need to prepare $formats_nav before any parameter munging
6817         my $formats_nav;
6818         if (!defined $parent) {
6819                 # --root commitdiff
6820                 $formats_nav .= '(initial)';
6821         } elsif (@$parents == 1) {
6822                 # single parent commit
6823                 $formats_nav .=
6824                         '(parent: ' .
6825                         $cgi->a({-href => href(action=>"commit",
6826                                                hash=>$parent)},
6827                                 esc_html(substr($parent, 0, 7))) .
6828                         ')';
6829         } else {
6830                 # merge commit
6831                 $formats_nav .=
6832                         '(merge: ' .
6833                         join(' ', map {
6834                                 $cgi->a({-href => href(action=>"commit",
6835                                                        hash=>$_)},
6836                                         esc_html(substr($_, 0, 7)));
6837                         } @$parents ) .
6838                         ')';
6839         }
6840         if (gitweb_check_feature('patches') && @$parents <= 1) {
6841                 $formats_nav .= " | " .
6842                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6843                                 "patch");
6844         }
6845
6846         if (!defined $parent) {
6847                 $parent = "--root";
6848         }
6849         my @difftree;
6850         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6851                 @diff_opts,
6852                 (@$parents <= 1 ? $parent : '-c'),
6853                 $hash, "--"
6854                 or die_error(500, "Open git-diff-tree failed");
6855         @difftree = map { chomp; $_ } <$fd>;
6856         close $fd or die_error(404, "Reading git-diff-tree failed");
6857
6858         # non-textual hash id's can be cached
6859         my $expires;
6860         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6861                 $expires = "+1d";
6862         }
6863         my $refs = git_get_references();
6864         my $ref = format_ref_marker($refs, $co{'id'});
6865
6866         git_header_html(undef, $expires);
6867         git_print_page_nav('commit', '',
6868                            $hash, $co{'tree'}, $hash,
6869                            $formats_nav);
6870
6871         if (defined $co{'parent'}) {
6872                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6873         } else {
6874                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6875         }
6876         print "<div class=\"title_text\">\n" .
6877               "<table class=\"object_header\">\n";
6878         git_print_authorship_rows(\%co);
6879         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6880         print "<tr>" .
6881               "<td>tree</td>" .
6882               "<td class=\"sha1\">" .
6883               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6884                        class => "list"}, $co{'tree'}) .
6885               "</td>" .
6886               "<td class=\"link\">" .
6887               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6888                       "tree");
6889         my $snapshot_links = format_snapshot_links($hash);
6890         if (defined $snapshot_links) {
6891                 print " | " . $snapshot_links;
6892         }
6893         print "</td>" .
6894               "</tr>\n";
6895
6896         foreach my $par (@$parents) {
6897                 print "<tr>" .
6898                       "<td>parent</td>" .
6899                       "<td class=\"sha1\">" .
6900                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6901                                class => "list"}, $par) .
6902                       "</td>" .
6903                       "<td class=\"link\">" .
6904                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6905                       " | " .
6906                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6907                       "</td>" .
6908                       "</tr>\n";
6909         }
6910         print "</table>".
6911               "</div>\n";
6912
6913         print "<div class=\"page_body\">\n";
6914         git_print_log($co{'comment'});
6915         print "</div>\n";
6916
6917         git_difftree_body(\@difftree, $hash, @$parents);
6918
6919         git_footer_html();
6920 }
6921
6922 sub git_object {
6923         # object is defined by:
6924         # - hash or hash_base alone
6925         # - hash_base and file_name
6926         my $type;
6927
6928         # - hash or hash_base alone
6929         if ($hash || ($hash_base && !defined $file_name)) {
6930                 my $object_id = $hash || $hash_base;
6931
6932                 open my $fd, "-|", quote_command(
6933                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6934                         or die_error(404, "Object does not exist");
6935                 $type = <$fd>;
6936                 chomp $type;
6937                 close $fd
6938                         or die_error(404, "Object does not exist");
6939
6940         # - hash_base and file_name
6941         } elsif ($hash_base && defined $file_name) {
6942                 $file_name =~ s,/+$,,;
6943
6944                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6945                         or die_error(404, "Base object does not exist");
6946
6947                 # here errors should not hapen
6948                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6949                         or die_error(500, "Open git-ls-tree failed");
6950                 my $line = <$fd>;
6951                 close $fd;
6952
6953                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6954                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6955                         die_error(404, "File or directory for given base does not exist");
6956                 }
6957                 $type = $2;
6958                 $hash = $3;
6959         } else {
6960                 die_error(400, "Not enough information to find object");
6961         }
6962
6963         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6964                                           hash=>$hash, hash_base=>$hash_base,
6965                                           file_name=>$file_name),
6966                              -status => '302 Found');
6967 }
6968
6969 sub git_blobdiff {
6970         my $format = shift || 'html';
6971
6972         my $fd;
6973         my @difftree;
6974         my %diffinfo;
6975         my $expires;
6976
6977         # preparing $fd and %diffinfo for git_patchset_body
6978         # new style URI
6979         if (defined $hash_base && defined $hash_parent_base) {
6980                 if (defined $file_name) {
6981                         # read raw output
6982                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6983                                 $hash_parent_base, $hash_base,
6984                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6985                                 or die_error(500, "Open git-diff-tree failed");
6986                         @difftree = map { chomp; $_ } <$fd>;
6987                         close $fd
6988                                 or die_error(404, "Reading git-diff-tree failed");
6989                         @difftree
6990                                 or die_error(404, "Blob diff not found");
6991
6992                 } elsif (defined $hash &&
6993                          $hash =~ /[0-9a-fA-F]{40}/) {
6994                         # try to find filename from $hash
6995
6996                         # read filtered raw output
6997                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6998                                 $hash_parent_base, $hash_base, "--"
6999                                 or die_error(500, "Open git-diff-tree failed");
7000                         @difftree =
7001                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7002                                 # $hash == to_id
7003                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7004                                 map { chomp; $_ } <$fd>;
7005                         close $fd
7006                                 or die_error(404, "Reading git-diff-tree failed");
7007                         @difftree
7008                                 or die_error(404, "Blob diff not found");
7009
7010                 } else {
7011                         die_error(400, "Missing one of the blob diff parameters");
7012                 }
7013
7014                 if (@difftree > 1) {
7015                         die_error(400, "Ambiguous blob diff specification");
7016                 }
7017
7018                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7019                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7020                 $file_name   ||= $diffinfo{'to_file'};
7021
7022                 $hash_parent ||= $diffinfo{'from_id'};
7023                 $hash        ||= $diffinfo{'to_id'};
7024
7025                 # non-textual hash id's can be cached
7026                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7027                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7028                         $expires = '+1d';
7029                 }
7030
7031                 # open patch output
7032                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7033                         '-p', ($format eq 'html' ? "--full-index" : ()),
7034                         $hash_parent_base, $hash_base,
7035                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7036                         or die_error(500, "Open git-diff-tree failed");
7037         }
7038
7039         # old/legacy style URI -- not generated anymore since 1.4.3.
7040         if (!%diffinfo) {
7041                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7042         }
7043
7044         # header
7045         if ($format eq 'html') {
7046                 my $formats_nav =
7047                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7048                                 "raw");
7049                 git_header_html(undef, $expires);
7050                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7051                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7052                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7053                 } else {
7054                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7055                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7056                 }
7057                 if (defined $file_name) {
7058                         git_print_page_path($file_name, "blob", $hash_base);
7059                 } else {
7060                         print "<div class=\"page_path\"></div>\n";
7061                 }
7062
7063         } elsif ($format eq 'plain') {
7064                 print $cgi->header(
7065                         -type => 'text/plain',
7066                         -charset => 'utf-8',
7067                         -expires => $expires,
7068                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7069
7070                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7071
7072         } else {
7073                 die_error(400, "Unknown blobdiff format");
7074         }
7075
7076         # patch
7077         if ($format eq 'html') {
7078                 print "<div class=\"page_body\">\n";
7079
7080                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
7081                 close $fd;
7082
7083                 print "</div>\n"; # class="page_body"
7084                 git_footer_html();
7085
7086         } else {
7087                 while (my $line = <$fd>) {
7088                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7089                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7090
7091                         print $line;
7092
7093                         last if $line =~ m!^\+\+\+!;
7094                 }
7095                 local $/ = undef;
7096                 print <$fd>;
7097                 close $fd;
7098         }
7099 }
7100
7101 sub git_blobdiff_plain {
7102         git_blobdiff('plain');
7103 }
7104
7105 sub git_commitdiff {
7106         my %params = @_;
7107         my $format = $params{-format} || 'html';
7108
7109         my ($patch_max) = gitweb_get_feature('patches');
7110         if ($format eq 'patch') {
7111                 die_error(403, "Patch view not allowed") unless $patch_max;
7112         }
7113
7114         $hash ||= $hash_base || "HEAD";
7115         my %co = parse_commit($hash)
7116             or die_error(404, "Unknown commit object");
7117
7118         # choose format for commitdiff for merge
7119         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7120                 $hash_parent = '--cc';
7121         }
7122         # we need to prepare $formats_nav before almost any parameter munging
7123         my $formats_nav;
7124         if ($format eq 'html') {
7125                 $formats_nav =
7126                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7127                                 "raw");
7128                 if ($patch_max && @{$co{'parents'}} <= 1) {
7129                         $formats_nav .= " | " .
7130                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7131                                         "patch");
7132                 }
7133
7134                 if (defined $hash_parent &&
7135                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7136                         # commitdiff with two commits given
7137                         my $hash_parent_short = $hash_parent;
7138                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7139                                 $hash_parent_short = substr($hash_parent, 0, 7);
7140                         }
7141                         $formats_nav .=
7142                                 ' (from';
7143                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7144                                 if ($co{'parents'}[$i] eq $hash_parent) {
7145                                         $formats_nav .= ' parent ' . ($i+1);
7146                                         last;
7147                                 }
7148                         }
7149                         $formats_nav .= ': ' .
7150                                 $cgi->a({-href => href(action=>"commitdiff",
7151                                                        hash=>$hash_parent)},
7152                                         esc_html($hash_parent_short)) .
7153                                 ')';
7154                 } elsif (!$co{'parent'}) {
7155                         # --root commitdiff
7156                         $formats_nav .= ' (initial)';
7157                 } elsif (scalar @{$co{'parents'}} == 1) {
7158                         # single parent commit
7159                         $formats_nav .=
7160                                 ' (parent: ' .
7161                                 $cgi->a({-href => href(action=>"commitdiff",
7162                                                        hash=>$co{'parent'})},
7163                                         esc_html(substr($co{'parent'}, 0, 7))) .
7164                                 ')';
7165                 } else {
7166                         # merge commit
7167                         if ($hash_parent eq '--cc') {
7168                                 $formats_nav .= ' | ' .
7169                                         $cgi->a({-href => href(action=>"commitdiff",
7170                                                                hash=>$hash, hash_parent=>'-c')},
7171                                                 'combined');
7172                         } else { # $hash_parent eq '-c'
7173                                 $formats_nav .= ' | ' .
7174                                         $cgi->a({-href => href(action=>"commitdiff",
7175                                                                hash=>$hash, hash_parent=>'--cc')},
7176                                                 'compact');
7177                         }
7178                         $formats_nav .=
7179                                 ' (merge: ' .
7180                                 join(' ', map {
7181                                         $cgi->a({-href => href(action=>"commitdiff",
7182                                                                hash=>$_)},
7183                                                 esc_html(substr($_, 0, 7)));
7184                                 } @{$co{'parents'}} ) .
7185                                 ')';
7186                 }
7187         }
7188
7189         my $hash_parent_param = $hash_parent;
7190         if (!defined $hash_parent_param) {
7191                 # --cc for multiple parents, --root for parentless
7192                 $hash_parent_param =
7193                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7194         }
7195
7196         # read commitdiff
7197         my $fd;
7198         my @difftree;
7199         if ($format eq 'html') {
7200                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7201                         "--no-commit-id", "--patch-with-raw", "--full-index",
7202                         $hash_parent_param, $hash, "--"
7203                         or die_error(500, "Open git-diff-tree failed");
7204
7205                 while (my $line = <$fd>) {
7206                         chomp $line;
7207                         # empty line ends raw part of diff-tree output
7208                         last unless $line;
7209                         push @difftree, scalar parse_difftree_raw_line($line);
7210                 }
7211
7212         } elsif ($format eq 'plain') {
7213                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7214                         '-p', $hash_parent_param, $hash, "--"
7215                         or die_error(500, "Open git-diff-tree failed");
7216         } elsif ($format eq 'patch') {
7217                 # For commit ranges, we limit the output to the number of
7218                 # patches specified in the 'patches' feature.
7219                 # For single commits, we limit the output to a single patch,
7220                 # diverging from the git-format-patch default.
7221                 my @commit_spec = ();
7222                 if ($hash_parent) {
7223                         if ($patch_max > 0) {
7224                                 push @commit_spec, "-$patch_max";
7225                         }
7226                         push @commit_spec, '-n', "$hash_parent..$hash";
7227                 } else {
7228                         if ($params{-single}) {
7229                                 push @commit_spec, '-1';
7230                         } else {
7231                                 if ($patch_max > 0) {
7232                                         push @commit_spec, "-$patch_max";
7233                                 }
7234                                 push @commit_spec, "-n";
7235                         }
7236                         push @commit_spec, '--root', $hash;
7237                 }
7238                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7239                         '--encoding=utf8', '--stdout', @commit_spec
7240                         or die_error(500, "Open git-format-patch failed");
7241         } else {
7242                 die_error(400, "Unknown commitdiff format");
7243         }
7244
7245         # non-textual hash id's can be cached
7246         my $expires;
7247         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7248                 $expires = "+1d";
7249         }
7250
7251         # write commit message
7252         if ($format eq 'html') {
7253                 my $refs = git_get_references();
7254                 my $ref = format_ref_marker($refs, $co{'id'});
7255
7256                 git_header_html(undef, $expires);
7257                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7258                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7259                 print "<div class=\"title_text\">\n" .
7260                       "<table class=\"object_header\">\n";
7261                 git_print_authorship_rows(\%co);
7262                 print "</table>".
7263                       "</div>\n";
7264                 print "<div class=\"page_body\">\n";
7265                 if (@{$co{'comment'}} > 1) {
7266                         print "<div class=\"log\">\n";
7267                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7268                         print "</div>\n"; # class="log"
7269                 }
7270
7271         } elsif ($format eq 'plain') {
7272                 my $refs = git_get_references("tags");
7273                 my $tagname = git_get_rev_name_tags($hash);
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                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7282                 print "From: " . to_utf8($co{'author'}) . "\n";
7283                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7284                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7285
7286                 print "X-Git-Tag: $tagname\n" if $tagname;
7287                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7288
7289                 foreach my $line (@{$co{'comment'}}) {
7290                         print to_utf8($line) . "\n";
7291                 }
7292                 print "---\n\n";
7293         } elsif ($format eq 'patch') {
7294                 my $filename = basename($project) . "-$hash.patch";
7295
7296                 print $cgi->header(
7297                         -type => 'text/plain',
7298                         -charset => 'utf-8',
7299                         -expires => $expires,
7300                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7301         }
7302
7303         # write patch
7304         if ($format eq 'html') {
7305                 my $use_parents = !defined $hash_parent ||
7306                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7307                 git_difftree_body(\@difftree, $hash,
7308                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7309                 print "<br/>\n";
7310
7311                 git_patchset_body($fd, \@difftree, $hash,
7312                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7313                 close $fd;
7314                 print "</div>\n"; # class="page_body"
7315                 git_footer_html();
7316
7317         } elsif ($format eq 'plain') {
7318                 local $/ = undef;
7319                 print <$fd>;
7320                 close $fd
7321                         or print "Reading git-diff-tree failed\n";
7322         } elsif ($format eq 'patch') {
7323                 local $/ = undef;
7324                 print <$fd>;
7325                 close $fd
7326                         or print "Reading git-format-patch failed\n";
7327         }
7328 }
7329
7330 sub git_commitdiff_plain {
7331         git_commitdiff(-format => 'plain');
7332 }
7333
7334 # format-patch-style patches
7335 sub git_patch {
7336         git_commitdiff(-format => 'patch', -single => 1);
7337 }
7338
7339 sub git_patches {
7340         git_commitdiff(-format => 'patch');
7341 }
7342
7343 sub git_history {
7344         git_log_generic('history', \&git_history_body,
7345                         $hash_base, $hash_parent_base,
7346                         $file_name, $hash);
7347 }
7348
7349 sub git_search {
7350         $searchtype ||= 'commit';
7351
7352         # check if appropriate features are enabled
7353         gitweb_check_feature('search')
7354                 or die_error(403, "Search is disabled");
7355         if ($searchtype eq 'pickaxe') {
7356                 # pickaxe may take all resources of your box and run for several minutes
7357                 # with every query - so decide by yourself how public you make this feature
7358                 gitweb_check_feature('pickaxe')
7359                         or die_error(403, "Pickaxe search is disabled");
7360         }
7361         if ($searchtype eq 'grep') {
7362                 # grep search might be potentially CPU-intensive, too
7363                 gitweb_check_feature('grep')
7364                         or die_error(403, "Grep search is disabled");
7365         }
7366
7367         if (!defined $searchtext) {
7368                 die_error(400, "Text field is empty");
7369         }
7370         if (!defined $hash) {
7371                 $hash = git_get_head_hash($project);
7372         }
7373         my %co = parse_commit($hash);
7374         if (!%co) {
7375                 die_error(404, "Unknown commit object");
7376         }
7377         if (!defined $page) {
7378                 $page = 0;
7379         }
7380
7381         if ($searchtype eq 'commit' ||
7382             $searchtype eq 'author' ||
7383             $searchtype eq 'committer') {
7384                 git_search_message(%co);
7385         } elsif ($searchtype eq 'pickaxe') {
7386                 git_search_changes(%co);
7387         } elsif ($searchtype eq 'grep') {
7388                 git_search_files(%co);
7389         } else {
7390                 die_error(400, "Unknown search type");
7391         }
7392 }
7393
7394 sub git_search_help {
7395         git_header_html();
7396         git_print_page_nav('','', $hash,$hash,$hash);
7397         print <<EOT;
7398 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7399 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7400 the pattern entered is recognized as the POSIX extended
7401 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7402 insensitive).</p>
7403 <dl>
7404 <dt><b>commit</b></dt>
7405 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7406 EOT
7407         my $have_grep = gitweb_check_feature('grep');
7408         if ($have_grep) {
7409                 print <<EOT;
7410 <dt><b>grep</b></dt>
7411 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7412     a different one) are searched for the given pattern. On large trees, this search can take
7413 a while and put some strain on the server, so please use it with some consideration. Note that
7414 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7415 case-sensitive.</dd>
7416 EOT
7417         }
7418         print <<EOT;
7419 <dt><b>author</b></dt>
7420 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7421 <dt><b>committer</b></dt>
7422 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7423 EOT
7424         my $have_pickaxe = gitweb_check_feature('pickaxe');
7425         if ($have_pickaxe) {
7426                 print <<EOT;
7427 <dt><b>pickaxe</b></dt>
7428 <dd>All commits that caused the string to appear or disappear from any file (changes that
7429 added, removed or "modified" the string) will be listed. This search can take a while and
7430 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7431 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7432 EOT
7433         }
7434         print "</dl>\n";
7435         git_footer_html();
7436 }
7437
7438 sub git_shortlog {
7439         git_log_generic('shortlog', \&git_shortlog_body,
7440                         $hash, $hash_parent);
7441 }
7442
7443 ## ......................................................................
7444 ## feeds (RSS, Atom; OPML)
7445
7446 sub git_feed {
7447         my $format = shift || 'atom';
7448         my $have_blame = gitweb_check_feature('blame');
7449
7450         # Atom: http://www.atomenabled.org/developers/syndication/
7451         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7452         if ($format ne 'rss' && $format ne 'atom') {
7453                 die_error(400, "Unknown web feed format");
7454         }
7455
7456         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7457         my $head = $hash || 'HEAD';
7458         my @commitlist = parse_commits($head, 150, 0, $file_name);
7459
7460         my %latest_commit;
7461         my %latest_date;
7462         my $content_type = "application/$format+xml";
7463         if (defined $cgi->http('HTTP_ACCEPT') &&
7464                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7465                 # browser (feed reader) prefers text/xml
7466                 $content_type = 'text/xml';
7467         }
7468         if (defined($commitlist[0])) {
7469                 %latest_commit = %{$commitlist[0]};
7470                 my $latest_epoch = $latest_commit{'committer_epoch'};
7471                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7472                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7473                 if (defined $if_modified) {
7474                         my $since;
7475                         if (eval { require HTTP::Date; 1; }) {
7476                                 $since = HTTP::Date::str2time($if_modified);
7477                         } elsif (eval { require Time::ParseDate; 1; }) {
7478                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7479                         }
7480                         if (defined $since && $latest_epoch <= $since) {
7481                                 print $cgi->header(
7482                                         -type => $content_type,
7483                                         -charset => 'utf-8',
7484                                         -last_modified => $latest_date{'rfc2822'},
7485                                         -status => '304 Not Modified');
7486                                 return;
7487                         }
7488                 }
7489                 print $cgi->header(
7490                         -type => $content_type,
7491                         -charset => 'utf-8',
7492                         -last_modified => $latest_date{'rfc2822'});
7493         } else {
7494                 print $cgi->header(
7495                         -type => $content_type,
7496                         -charset => 'utf-8');
7497         }
7498
7499         # Optimization: skip generating the body if client asks only
7500         # for Last-Modified date.
7501         return if ($cgi->request_method() eq 'HEAD');
7502
7503         # header variables
7504         my $title = "$site_name - $project/$action";
7505         my $feed_type = 'log';
7506         if (defined $hash) {
7507                 $title .= " - '$hash'";
7508                 $feed_type = 'branch log';
7509                 if (defined $file_name) {
7510                         $title .= " :: $file_name";
7511                         $feed_type = 'history';
7512                 }
7513         } elsif (defined $file_name) {
7514                 $title .= " - $file_name";
7515                 $feed_type = 'history';
7516         }
7517         $title .= " $feed_type";
7518         my $descr = git_get_project_description($project);
7519         if (defined $descr) {
7520                 $descr = esc_html($descr);
7521         } else {
7522                 $descr = "$project " .
7523                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7524                          " feed";
7525         }
7526         my $owner = git_get_project_owner($project);
7527         $owner = esc_html($owner);
7528
7529         #header
7530         my $alt_url;
7531         if (defined $file_name) {
7532                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7533         } elsif (defined $hash) {
7534                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7535         } else {
7536                 $alt_url = href(-full=>1, action=>"summary");
7537         }
7538         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7539         if ($format eq 'rss') {
7540                 print <<XML;
7541 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7542 <channel>
7543 XML
7544                 print "<title>$title</title>\n" .
7545                       "<link>$alt_url</link>\n" .
7546                       "<description>$descr</description>\n" .
7547                       "<language>en</language>\n" .
7548                       # project owner is responsible for 'editorial' content
7549                       "<managingEditor>$owner</managingEditor>\n";
7550                 if (defined $logo || defined $favicon) {
7551                         # prefer the logo to the favicon, since RSS
7552                         # doesn't allow both
7553                         my $img = esc_url($logo || $favicon);
7554                         print "<image>\n" .
7555                               "<url>$img</url>\n" .
7556                               "<title>$title</title>\n" .
7557                               "<link>$alt_url</link>\n" .
7558                               "</image>\n";
7559                 }
7560                 if (%latest_date) {
7561                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7562                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7563                 }
7564                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7565         } elsif ($format eq 'atom') {
7566                 print <<XML;
7567 <feed xmlns="http://www.w3.org/2005/Atom">
7568 XML
7569                 print "<title>$title</title>\n" .
7570                       "<subtitle>$descr</subtitle>\n" .
7571                       '<link rel="alternate" type="text/html" href="' .
7572                       $alt_url . '" />' . "\n" .
7573                       '<link rel="self" type="' . $content_type . '" href="' .
7574                       $cgi->self_url() . '" />' . "\n" .
7575                       "<id>" . href(-full=>1) . "</id>\n" .
7576                       # use project owner for feed author
7577                       "<author><name>$owner</name></author>\n";
7578                 if (defined $favicon) {
7579                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7580                 }
7581                 if (defined $logo) {
7582                         # not twice as wide as tall: 72 x 27 pixels
7583                         print "<logo>" . esc_url($logo) . "</logo>\n";
7584                 }
7585                 if (! %latest_date) {
7586                         # dummy date to keep the feed valid until commits trickle in:
7587                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7588                 } else {
7589                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7590                 }
7591                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7592         }
7593
7594         # contents
7595         for (my $i = 0; $i <= $#commitlist; $i++) {
7596                 my %co = %{$commitlist[$i]};
7597                 my $commit = $co{'id'};
7598                 # we read 150, we always show 30 and the ones more recent than 48 hours
7599                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7600                         last;
7601                 }
7602                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7603
7604                 # get list of changed files
7605                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7606                         $co{'parent'} || "--root",
7607                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7608                         or next;
7609                 my @difftree = map { chomp; $_ } <$fd>;
7610                 close $fd
7611                         or next;
7612
7613                 # print element (entry, item)
7614                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7615                 if ($format eq 'rss') {
7616                         print "<item>\n" .
7617                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7618                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7619                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7620                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7621                               "<link>$co_url</link>\n" .
7622                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7623                               "<content:encoded>" .
7624                               "<![CDATA[\n";
7625                 } elsif ($format eq 'atom') {
7626                         print "<entry>\n" .
7627                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7628                               "<updated>$cd{'iso-8601'}</updated>\n" .
7629                               "<author>\n" .
7630                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7631                         if ($co{'author_email'}) {
7632                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7633                         }
7634                         print "</author>\n" .
7635                               # use committer for contributor
7636                               "<contributor>\n" .
7637                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7638                         if ($co{'committer_email'}) {
7639                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7640                         }
7641                         print "</contributor>\n" .
7642                               "<published>$cd{'iso-8601'}</published>\n" .
7643                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7644                               "<id>$co_url</id>\n" .
7645                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7646                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7647                 }
7648                 my $comment = $co{'comment'};
7649                 print "<pre>\n";
7650                 foreach my $line (@$comment) {
7651                         $line = esc_html($line);
7652                         print "$line\n";
7653                 }
7654                 print "</pre><ul>\n";
7655                 foreach my $difftree_line (@difftree) {
7656                         my %difftree = parse_difftree_raw_line($difftree_line);
7657                         next if !$difftree{'from_id'};
7658
7659                         my $file = $difftree{'file'} || $difftree{'to_file'};
7660
7661                         print "<li>" .
7662                               "[" .
7663                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7664                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7665                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7666                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7667                                       -title => "diff"}, 'D');
7668                         if ($have_blame) {
7669                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7670                                                              file_name=>$file, hash_base=>$commit),
7671                                               -title => "blame"}, 'B');
7672                         }
7673                         # if this is not a feed of a file history
7674                         if (!defined $file_name || $file_name ne $file) {
7675                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7676                                                              file_name=>$file, hash=>$commit),
7677                                               -title => "history"}, 'H');
7678                         }
7679                         $file = esc_path($file);
7680                         print "] ".
7681                               "$file</li>\n";
7682                 }
7683                 if ($format eq 'rss') {
7684                         print "</ul>]]>\n" .
7685                               "</content:encoded>\n" .
7686                               "</item>\n";
7687                 } elsif ($format eq 'atom') {
7688                         print "</ul>\n</div>\n" .
7689                               "</content>\n" .
7690                               "</entry>\n";
7691                 }
7692         }
7693
7694         # end of feed
7695         if ($format eq 'rss') {
7696                 print "</channel>\n</rss>\n";
7697         } elsif ($format eq 'atom') {
7698                 print "</feed>\n";
7699         }
7700 }
7701
7702 sub git_rss {
7703         git_feed('rss');
7704 }
7705
7706 sub git_atom {
7707         git_feed('atom');
7708 }
7709
7710 sub git_opml {
7711         my @list = git_get_projects_list();
7712         if (!@list) {
7713                 die_error(404, "No projects found");
7714         }
7715
7716         print $cgi->header(
7717                 -type => 'text/xml',
7718                 -charset => 'utf-8',
7719                 -content_disposition => 'inline; filename="opml.xml"');
7720
7721         print <<XML;
7722 <?xml version="1.0" encoding="utf-8"?>
7723 <opml version="1.0">
7724 <head>
7725   <title>$site_name OPML Export</title>
7726 </head>
7727 <body>
7728 <outline text="git RSS feeds">
7729 XML
7730
7731         foreach my $pr (@list) {
7732                 my %proj = %$pr;
7733                 my $head = git_get_head_hash($proj{'path'});
7734                 if (!defined $head) {
7735                         next;
7736                 }
7737                 $git_dir = "$projectroot/$proj{'path'}";
7738                 my %co = parse_commit($head);
7739                 if (!%co) {
7740                         next;
7741                 }
7742
7743                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7744                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7745                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7746                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7747         }
7748         print <<XML;
7749 </outline>
7750 </body>
7751 </opml>
7752 XML
7753 }