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

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