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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         project_filter => "pf",
 765         # this must be last entry (for manipulation from JavaScript)
 766         javascript => "js"
 767 );
 768 our %cgi_param_mapping = @cgi_param_mapping;
 769
 770 # we will also need to know the possible actions, for validation
 771 our %actions = (
 772         "blame" => \&git_blame,
 773         "blame_incremental" => \&git_blame_incremental,
 774         "blame_data" => \&git_blame_data,
 775         "blobdiff" => \&git_blobdiff,
 776         "blobdiff_plain" => \&git_blobdiff_plain,
 777         "blob" => \&git_blob,
 778         "blob_plain" => \&git_blob_plain,
 779         "commitdiff" => \&git_commitdiff,
 780         "commitdiff_plain" => \&git_commitdiff_plain,
 781         "commit" => \&git_commit,
 782         "forks" => \&git_forks,
 783         "heads" => \&git_heads,
 784         "history" => \&git_history,
 785         "log" => \&git_log,
 786         "patch" => \&git_patch,
 787         "patches" => \&git_patches,
 788         "remotes" => \&git_remotes,
 789         "rss" => \&git_rss,
 790         "atom" => \&git_atom,
 791         "search" => \&git_search,
 792         "search_help" => \&git_search_help,
 793         "shortlog" => \&git_shortlog,
 794         "summary" => \&git_summary,
 795         "tag" => \&git_tag,
 796         "tags" => \&git_tags,
 797         "tree" => \&git_tree,
 798         "snapshot" => \&git_snapshot,
 799         "object" => \&git_object,
 800         # those below don't need $project
 801         "opml" => \&git_opml,
 802         "project_list" => \&git_project_list,
 803         "project_index" => \&git_project_index,
 804 );
 805
 806 # finally, we have the hash of allowed extra_options for the commands that
 807 # allow them
 808 our %allowed_options = (
 809         "--no-merges" => [ qw(rss atom log shortlog history) ],
 810 );
 811
 812 # fill %input_params with the CGI parameters. All values except for 'opt'
 813 # should be single values, but opt can be an array. We should probably
 814 # build an array of parameters that can be multi-valued, but since for the time
 815 # being it's only this one, we just single it out
 816 sub evaluate_query_params {
 817         our $cgi;
 818
 819         while (my ($name, $symbol) = each %cgi_param_mapping) {
 820                 if ($symbol eq 'opt') {
 821                         $input_params{$name} = [ $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = $cgi->param($symbol);
 824                 }
 825         }
 826 }
 827
 828 # now read PATH_INFO and update the parameter list for missing parameters
 829 sub evaluate_path_info {
 830         return if defined $input_params{'project'};
 831         return if !$path_info;
 832         $path_info =~ s,^/+,,;
 833         return if !$path_info;
 834
 835         # find which part of PATH_INFO is project
 836         my $project = $path_info;
 837         $project =~ s,/+$,,;
 838         while ($project && !check_head_link("$projectroot/$project")) {
 839                 $project =~ s,/*[^/]*$,,;
 840         }
 841         return unless $project;
 842         $input_params{'project'} = $project;
 843
 844         # do not change any parameters if an action is given using the query string
 845         return if $input_params{'action'};
 846         $path_info =~ s,^\Q$project\E/*,,;
 847
 848         # next, check if we have an action
 849         my $action = $path_info;
 850         $action =~ s,/.*$,,;
 851         if (exists $actions{$action}) {
 852                 $path_info =~ s,^$action/*,,;
 853                 $input_params{'action'} = $action;
 854         }
 855
 856         # list of actions that want hash_base instead of hash, but can have no
 857         # pathname (f) parameter
 858         my @wants_base = (
 859                 'tree',
 860                 'history',
 861         );
 862
 863         # we want to catch, among others
 864         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 865         my ($parentrefname, $parentpathname, $refname, $pathname) =
 866                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 867
 868         # first, analyze the 'current' part
 869         if (defined $pathname) {
 870                 # we got "branch:filename" or "branch:dir/"
 871                 # we could use git_get_type(branch:pathname), but:
 872                 # - it needs $git_dir
 873                 # - it does a git() call
 874                 # - the convention of terminating directories with a slash
 875                 #   makes it superfluous
 876                 # - embedding the action in the PATH_INFO would make it even
 877                 #   more superfluous
 878                 $pathname =~ s,^/+,,;
 879                 if (!$pathname || substr($pathname, -1) eq "/") {
 880                         $input_params{'action'} ||= "tree";
 881                         $pathname =~ s,/$,,;
 882                 } else {
 883                         # the default action depends on whether we had parent info
 884                         # or not
 885                         if ($parentrefname) {
 886                                 $input_params{'action'} ||= "blobdiff_plain";
 887                         } else {
 888                                 $input_params{'action'} ||= "blob_plain";
 889                         }
 890                 }
 891                 $input_params{'hash_base'} ||= $refname;
 892                 $input_params{'file_name'} ||= $pathname;
 893         } elsif (defined $refname) {
 894                 # we got "branch". In this case we have to choose if we have to
 895                 # set hash or hash_base.
 896                 #
 897                 # Most of the actions without a pathname only want hash to be
 898                 # set, except for the ones specified in @wants_base that want
 899                 # hash_base instead. It should also be noted that hand-crafted
 900                 # links having 'history' as an action and no pathname or hash
 901                 # set will fail, but that happens regardless of PATH_INFO.
 902                 if (defined $parentrefname) {
 903                         # if there is parent let the default be 'shortlog' action
 904                         # (for http://git.example.com/repo.git/A..B links); if there
 905                         # is no parent, dispatch will detect type of object and set
 906                         # action appropriately if required (if action is not set)
 907                         $input_params{'action'} ||= "shortlog";
 908                 }
 909                 if ($input_params{'action'} &&
 910                     grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_base'} ||= $refname;
 912                 } else {
 913                         $input_params{'hash'} ||= $refname;
 914                 }
 915         }
 916
 917         # next, handle the 'parent' part, if present
 918         if (defined $parentrefname) {
 919                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 920                 # someproject/blobdiff/oldrev..newrev:/filename
 921                 if ($parentpathname) {
 922                         $parentpathname =~ s,^/+,,;
 923                         $parentpathname =~ s,/$,,;
 924                         $input_params{'file_parent'} ||= $parentpathname;
 925                 } else {
 926                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 927                 }
 928                 # we assume that hash_parent_base is wanted if a path was specified,
 929                 # or if the action wants hash_base instead of hash
 930                 if (defined $input_params{'file_parent'} ||
 931                         grep { $_ eq $input_params{'action'} } @wants_base) {
 932                         $input_params{'hash_parent_base'} ||= $parentrefname;
 933                 } else {
 934                         $input_params{'hash_parent'} ||= $parentrefname;
 935                 }
 936         }
 937
 938         # for the snapshot action, we allow URLs in the form
 939         # $project/snapshot/$hash.ext
 940         # where .ext determines the snapshot and gets removed from the
 941         # passed $refname to provide the $hash.
 942         #
 943         # To be able to tell that $refname includes the format extension, we
 944         # require the following two conditions to be satisfied:
 945         # - the hash input parameter MUST have been set from the $refname part
 946         #   of the URL (i.e. they must be equal)
 947         # - the snapshot format MUST NOT have been defined already (e.g. from
 948         #   CGI parameter sf)
 949         # It's also useless to try any matching unless $refname has a dot,
 950         # so we check for that too
 951         if (defined $input_params{'action'} &&
 952                 $input_params{'action'} eq 'snapshot' &&
 953                 defined $refname && index($refname, '.') != -1 &&
 954                 $refname eq $input_params{'hash'} &&
 955                 !defined $input_params{'snapshot_format'}) {
 956                 # We loop over the known snapshot formats, checking for
 957                 # extensions. Allowed extensions are both the defined suffix
 958                 # (which includes the initial dot already) and the snapshot
 959                 # format key itself, with a prepended dot
 960                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 961                         my $hash = $refname;
 962                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 963                                 next;
 964                         }
 965                         my $sfx = $1;
 966                         # a valid suffix was found, so set the snapshot format
 967                         # and reset the hash parameter
 968                         $input_params{'snapshot_format'} = $fmt;
 969                         $input_params{'hash'} = $hash;
 970                         # we also set the format suffix to the one requested
 971                         # in the URL: this way a request for e.g. .tgz returns
 972                         # a .tgz instead of a .tar.gz
 973                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 974                         last;
 975                 }
 976         }
 977 }
 978
 979 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 980      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 981      $searchtext, $search_regexp, $project_filter);
 982 sub evaluate_and_validate_params {
 983         our $action = $input_params{'action'};
 984         if (defined $action) {
 985                 if (!validate_action($action)) {
 986                         die_error(400, "Invalid action parameter");
 987                 }
 988         }
 989
 990         # parameters which are pathnames
 991         our $project = $input_params{'project'};
 992         if (defined $project) {
 993                 if (!validate_project($project)) {
 994                         undef $project;
 995                         die_error(404, "No such project");
 996                 }
 997         }
 998
 999         our $project_filter = $input_params{'project_filter'};
1000         if (defined $project_filter) {
1001                 if (!validate_pathname($project_filter)) {
1002                         die_error(404, "Invalid project_filter parameter");
1003                 }
1004         }
1005
1006         our $file_name = $input_params{'file_name'};
1007         if (defined $file_name) {
1008                 if (!validate_pathname($file_name)) {
1009                         die_error(400, "Invalid file parameter");
1010                 }
1011         }
1012
1013         our $file_parent = $input_params{'file_parent'};
1014         if (defined $file_parent) {
1015                 if (!validate_pathname($file_parent)) {
1016                         die_error(400, "Invalid file parent parameter");
1017                 }
1018         }
1019
1020         # parameters which are refnames
1021         our $hash = $input_params{'hash'};
1022         if (defined $hash) {
1023                 if (!validate_refname($hash)) {
1024                         die_error(400, "Invalid hash parameter");
1025                 }
1026         }
1027
1028         our $hash_parent = $input_params{'hash_parent'};
1029         if (defined $hash_parent) {
1030                 if (!validate_refname($hash_parent)) {
1031                         die_error(400, "Invalid hash parent parameter");
1032                 }
1033         }
1034
1035         our $hash_base = $input_params{'hash_base'};
1036         if (defined $hash_base) {
1037                 if (!validate_refname($hash_base)) {
1038                         die_error(400, "Invalid hash base parameter");
1039                 }
1040         }
1041
1042         our @extra_options = @{$input_params{'extra_options'}};
1043         # @extra_options is always defined, since it can only be (currently) set from
1044         # CGI, and $cgi->param() returns the empty array in array context if the param
1045         # is not set
1046         foreach my $opt (@extra_options) {
1047                 if (not exists $allowed_options{$opt}) {
1048                         die_error(400, "Invalid option parameter");
1049                 }
1050                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1051                         die_error(400, "Invalid option parameter for this action");
1052                 }
1053         }
1054
1055         our $hash_parent_base = $input_params{'hash_parent_base'};
1056         if (defined $hash_parent_base) {
1057                 if (!validate_refname($hash_parent_base)) {
1058                         die_error(400, "Invalid hash parent base parameter");
1059                 }
1060         }
1061
1062         # other parameters
1063         our $page = $input_params{'page'};
1064         if (defined $page) {
1065                 if ($page =~ m/[^0-9]/) {
1066                         die_error(400, "Invalid page parameter");
1067                 }
1068         }
1069
1070         our $searchtype = $input_params{'searchtype'};
1071         if (defined $searchtype) {
1072                 if ($searchtype =~ m/[^a-z]/) {
1073                         die_error(400, "Invalid searchtype parameter");
1074                 }
1075         }
1076
1077         our $search_use_regexp = $input_params{'search_use_regexp'};
1078
1079         our $searchtext = $input_params{'searchtext'};
1080         our $search_regexp;
1081         if (defined $searchtext) {
1082                 if (length($searchtext) < 2) {
1083                         die_error(403, "At least two characters are required for search parameter");
1084                 }
1085                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1086         }
1087 }
1088
1089 # path to the current git repository
1090 our $git_dir;
1091 sub evaluate_git_dir {
1092         our $git_dir = "$projectroot/$project" if $project;
1093 }
1094
1095 our (@snapshot_fmts, $git_avatar);
1096 sub configure_gitweb_features {
1097         # list of supported snapshot formats
1098         our @snapshot_fmts = gitweb_get_feature('snapshot');
1099         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1100
1101         # check that the avatar feature is set to a known provider name,
1102         # and for each provider check if the dependencies are satisfied.
1103         # if the provider name is invalid or the dependencies are not met,
1104         # reset $git_avatar to the empty string.
1105         our ($git_avatar) = gitweb_get_feature('avatar');
1106         if ($git_avatar eq 'gravatar') {
1107                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1108         } elsif ($git_avatar eq 'picon') {
1109                 # no dependencies
1110         } else {
1111                 $git_avatar = '';
1112         }
1113 }
1114
1115 # custom error handler: 'die <message>' is Internal Server Error
1116 sub handle_errors_html {
1117         my $msg = shift; # it is already HTML escaped
1118
1119         # to avoid infinite loop where error occurs in die_error,
1120         # change handler to default handler, disabling handle_errors_html
1121         set_message("Error occured when inside die_error:\n$msg");
1122
1123         # you cannot jump out of die_error when called as error handler;
1124         # the subroutine set via CGI::Carp::set_message is called _after_
1125         # HTTP headers are already written, so it cannot write them itself
1126         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1127 }
1128 set_message(\&handle_errors_html);
1129
1130 # dispatch
1131 sub dispatch {
1132         if (!defined $action) {
1133                 if (defined $hash) {
1134                         $action = git_get_type($hash);
1135                         $action or die_error(404, "Object does not exist");
1136                 } elsif (defined $hash_base && defined $file_name) {
1137                         $action = git_get_type("$hash_base:$file_name");
1138                         $action or die_error(404, "File or directory does not exist");
1139                 } elsif (defined $project) {
1140                         $action = 'summary';
1141                 } else {
1142                         $action = 'project_list';
1143                 }
1144         }
1145         if (!defined($actions{$action})) {
1146                 die_error(400, "Unknown action");
1147         }
1148         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1149             !$project) {
1150                 die_error(400, "Project needed");
1151         }
1152         $actions{$action}->();
1153 }
1154
1155 sub reset_timer {
1156         our $t0 = [ gettimeofday() ]
1157                 if defined $t0;
1158         our $number_of_git_cmds = 0;
1159 }
1160
1161 our $first_request = 1;
1162 sub run_request {
1163         reset_timer();
1164
1165         evaluate_uri();
1166         if ($first_request) {
1167                 evaluate_gitweb_config();
1168                 evaluate_git_version();
1169         }
1170         if ($per_request_config) {
1171                 if (ref($per_request_config) eq 'CODE') {
1172                         $per_request_config->();
1173                 } elsif (!$first_request) {
1174                         evaluate_gitweb_config();
1175                 }
1176         }
1177         check_loadavg();
1178
1179         # $projectroot and $projects_list might be set in gitweb config file
1180         $projects_list ||= $projectroot;
1181
1182         evaluate_query_params();
1183         evaluate_path_info();
1184         evaluate_and_validate_params();
1185         evaluate_git_dir();
1186
1187         configure_gitweb_features();
1188
1189         dispatch();
1190 }
1191
1192 our $is_last_request = sub { 1 };
1193 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1194 our $CGI = 'CGI';
1195 our $cgi;
1196 sub configure_as_fcgi {
1197         require CGI::Fast;
1198         our $CGI = 'CGI::Fast';
1199
1200         my $request_number = 0;
1201         # let each child service 100 requests
1202         our $is_last_request = sub { ++$request_number > 100 };
1203 }
1204 sub evaluate_argv {
1205         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1206         configure_as_fcgi()
1207                 if $script_name =~ /\.fcgi$/;
1208
1209         return unless (@ARGV);
1210
1211         require Getopt::Long;
1212         Getopt::Long::GetOptions(
1213                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1214                 'nproc|n=i' => sub {
1215                         my ($arg, $val) = @_;
1216                         return unless eval { require FCGI::ProcManager; 1; };
1217                         my $proc_manager = FCGI::ProcManager->new({
1218                                 n_processes => $val,
1219                         });
1220                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1221                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1222                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1223                 },
1224         );
1225 }
1226
1227 sub run {
1228         evaluate_argv();
1229
1230         $first_request = 1;
1231         $pre_listen_hook->()
1232                 if $pre_listen_hook;
1233
1234  REQUEST:
1235         while ($cgi = $CGI->new()) {
1236                 $pre_dispatch_hook->()
1237                         if $pre_dispatch_hook;
1238
1239                 run_request();
1240
1241                 $post_dispatch_hook->()
1242                         if $post_dispatch_hook;
1243                 $first_request = 0;
1244
1245                 last REQUEST if ($is_last_request->());
1246         }
1247
1248  DONE_GITWEB:
1249         1;
1250 }
1251
1252 run();
1253
1254 if (defined caller) {
1255         # wrapped in a subroutine processing requests,
1256         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1257         return;
1258 } else {
1259         # pure CGI script, serving single request
1260         exit;
1261 }
1262
1263 ## ======================================================================
1264 ## action links
1265
1266 # possible values of extra options
1267 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1268 # -replay => 1      - start from a current view (replay with modifications)
1269 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1270 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1271 sub href {
1272         my %params = @_;
1273         # default is to use -absolute url() i.e. $my_uri
1274         my $href = $params{-full} ? $my_url : $my_uri;
1275
1276         # implicit -replay, must be first of implicit params
1277         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1278
1279         $params{'project'} = $project unless exists $params{'project'};
1280
1281         if ($params{-replay}) {
1282                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1283                         if (!exists $params{$name}) {
1284                                 $params{$name} = $input_params{$name};
1285                         }
1286                 }
1287         }
1288
1289         my $use_pathinfo = gitweb_check_feature('pathinfo');
1290         if (defined $params{'project'} &&
1291             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1292                 # try to put as many parameters as possible in PATH_INFO:
1293                 #   - project name
1294                 #   - action
1295                 #   - hash_parent or hash_parent_base:/file_parent
1296                 #   - hash or hash_base:/filename
1297                 #   - the snapshot_format as an appropriate suffix
1298
1299                 # When the script is the root DirectoryIndex for the domain,
1300                 # $href here would be something like http://gitweb.example.com/
1301                 # Thus, we strip any trailing / from $href, to spare us double
1302                 # slashes in the final URL
1303                 $href =~ s,/$,,;
1304
1305                 # Then add the project name, if present
1306                 $href .= "/".esc_path_info($params{'project'});
1307                 delete $params{'project'};
1308
1309                 # since we destructively absorb parameters, we keep this
1310                 # boolean that remembers if we're handling a snapshot
1311                 my $is_snapshot = $params{'action'} eq 'snapshot';
1312
1313                 # Summary just uses the project path URL, any other action is
1314                 # added to the URL
1315                 if (defined $params{'action'}) {
1316                         $href .= "/".esc_path_info($params{'action'})
1317                                 unless $params{'action'} eq 'summary';
1318                         delete $params{'action'};
1319                 }
1320
1321                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1322                 # stripping nonexistent or useless pieces
1323                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1324                         || $params{'hash_parent'} || $params{'hash'});
1325                 if (defined $params{'hash_base'}) {
1326                         if (defined $params{'hash_parent_base'}) {
1327                                 $href .= esc_path_info($params{'hash_parent_base'});
1328                                 # skip the file_parent if it's the same as the file_name
1329                                 if (defined $params{'file_parent'}) {
1330                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1331                                                 delete $params{'file_parent'};
1332                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1333                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1334                                                 delete $params{'file_parent'};
1335                                         }
1336                                 }
1337                                 $href .= "..";
1338                                 delete $params{'hash_parent'};
1339                                 delete $params{'hash_parent_base'};
1340                         } elsif (defined $params{'hash_parent'}) {
1341                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1342                                 delete $params{'hash_parent'};
1343                         }
1344
1345                         $href .= esc_path_info($params{'hash_base'});
1346                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1347                                 $href .= ":/".esc_path_info($params{'file_name'});
1348                                 delete $params{'file_name'};
1349                         }
1350                         delete $params{'hash'};
1351                         delete $params{'hash_base'};
1352                 } elsif (defined $params{'hash'}) {
1353                         $href .= esc_path_info($params{'hash'});
1354                         delete $params{'hash'};
1355                 }
1356
1357                 # If the action was a snapshot, we can absorb the
1358                 # snapshot_format parameter too
1359                 if ($is_snapshot) {
1360                         my $fmt = $params{'snapshot_format'};
1361                         # snapshot_format should always be defined when href()
1362                         # is called, but just in case some code forgets, we
1363                         # fall back to the default
1364                         $fmt ||= $snapshot_fmts[0];
1365                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1366                         delete $params{'snapshot_format'};
1367                 }
1368         }
1369
1370         # now encode the parameters explicitly
1371         my @result = ();
1372         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1373                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1374                 if (defined $params{$name}) {
1375                         if (ref($params{$name}) eq "ARRAY") {
1376                                 foreach my $par (@{$params{$name}}) {
1377                                         push @result, $symbol . "=" . esc_param($par);
1378                                 }
1379                         } else {
1380                                 push @result, $symbol . "=" . esc_param($params{$name});
1381                         }
1382                 }
1383         }
1384         $href .= "?" . join(';', @result) if scalar @result;
1385
1386         # final transformation: trailing spaces must be escaped (URI-encoded)
1387         $href =~ s/(\s+)$/CGI::escape($1)/e;
1388
1389         if ($params{-anchor}) {
1390                 $href .= "#".esc_param($params{-anchor});
1391         }
1392
1393         return $href;
1394 }
1395
1396
1397 ## ======================================================================
1398 ## validation, quoting/unquoting and escaping
1399
1400 sub validate_action {
1401         my $input = shift || return undef;
1402         return undef unless exists $actions{$input};
1403         return $input;
1404 }
1405
1406 sub validate_project {
1407         my $input = shift || return undef;
1408         if (!validate_pathname($input) ||
1409                 !(-d "$projectroot/$input") ||
1410                 !check_export_ok("$projectroot/$input") ||
1411                 ($strict_export && !project_in_list($input))) {
1412                 return undef;
1413         } else {
1414                 return $input;
1415         }
1416 }
1417
1418 sub validate_pathname {
1419         my $input = shift || return undef;
1420
1421         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1422         # at the beginning, at the end, and between slashes.
1423         # also this catches doubled slashes
1424         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1425                 return undef;
1426         }
1427         # no null characters
1428         if ($input =~ m!\0!) {
1429                 return undef;
1430         }
1431         return $input;
1432 }
1433
1434 sub validate_refname {
1435         my $input = shift || return undef;
1436
1437         # textual hashes are O.K.
1438         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1439                 return $input;
1440         }
1441         # it must be correct pathname
1442         $input = validate_pathname($input)
1443                 or return undef;
1444         # restrictions on ref name according to git-check-ref-format
1445         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1446                 return undef;
1447         }
1448         return $input;
1449 }
1450
1451 # decode sequences of octets in utf8 into Perl's internal form,
1452 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1453 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1454 sub to_utf8 {
1455         my $str = shift;
1456         return undef unless defined $str;
1457
1458         if (utf8::is_utf8($str) || utf8::decode($str)) {
1459                 return $str;
1460         } else {
1461                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1462         }
1463 }
1464
1465 # quote unsafe chars, but keep the slash, even when it's not
1466 # correct, but quoted slashes look too horrible in bookmarks
1467 sub esc_param {
1468         my $str = shift;
1469         return undef unless defined $str;
1470         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1471         $str =~ s/ /\+/g;
1472         return $str;
1473 }
1474
1475 # the quoting rules for path_info fragment are slightly different
1476 sub esc_path_info {
1477         my $str = shift;
1478         return undef unless defined $str;
1479
1480         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1481         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1482
1483         return $str;
1484 }
1485
1486 # quote unsafe chars in whole URL, so some characters cannot be quoted
1487 sub esc_url {
1488         my $str = shift;
1489         return undef unless defined $str;
1490         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1491         $str =~ s/ /\+/g;
1492         return $str;
1493 }
1494
1495 # quote unsafe characters in HTML attributes
1496 sub esc_attr {
1497
1498         # for XHTML conformance escaping '"' to '&quot;' is not enough
1499         return esc_html(@_);
1500 }
1501
1502 # replace invalid utf8 character with SUBSTITUTION sequence
1503 sub esc_html {
1504         my $str = shift;
1505         my %opts = @_;
1506
1507         return undef unless defined $str;
1508
1509         $str = to_utf8($str);
1510         $str = $cgi->escapeHTML($str);
1511         if ($opts{'-nbsp'}) {
1512                 $str =~ s/ /&nbsp;/g;
1513         }
1514         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1515         return $str;
1516 }
1517
1518 # quote control characters and escape filename to HTML
1519 sub esc_path {
1520         my $str = shift;
1521         my %opts = @_;
1522
1523         return undef unless defined $str;
1524
1525         $str = to_utf8($str);
1526         $str = $cgi->escapeHTML($str);
1527         if ($opts{'-nbsp'}) {
1528                 $str =~ s/ /&nbsp;/g;
1529         }
1530         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1531         return $str;
1532 }
1533
1534 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1535 sub sanitize {
1536         my $str = shift;
1537
1538         return undef unless defined $str;
1539
1540         $str = to_utf8($str);
1541         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1542         return $str;
1543 }
1544
1545 # Make control characters "printable", using character escape codes (CEC)
1546 sub quot_cec {
1547         my $cntrl = shift;
1548         my %opts = @_;
1549         my %es = ( # character escape codes, aka escape sequences
1550                 "\t" => '\t',   # tab            (HT)
1551                 "\n" => '\n',   # line feed      (LF)
1552                 "\r" => '\r',   # carrige return (CR)
1553                 "\f" => '\f',   # form feed      (FF)
1554                 "\b" => '\b',   # backspace      (BS)
1555                 "\a" => '\a',   # alarm (bell)   (BEL)
1556                 "\e" => '\e',   # escape         (ESC)
1557                 "\013" => '\v', # vertical tab   (VT)
1558                 "\000" => '\0', # nul character  (NUL)
1559         );
1560         my $chr = ( (exists $es{$cntrl})
1561                     ? $es{$cntrl}
1562                     : sprintf('\%2x', ord($cntrl)) );
1563         if ($opts{-nohtml}) {
1564                 return $chr;
1565         } else {
1566                 return "<span class=\"cntrl\">$chr</span>";
1567         }
1568 }
1569
1570 # Alternatively use unicode control pictures codepoints,
1571 # Unicode "printable representation" (PR)
1572 sub quot_upr {
1573         my $cntrl = shift;
1574         my %opts = @_;
1575
1576         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1577         if ($opts{-nohtml}) {
1578                 return $chr;
1579         } else {
1580                 return "<span class=\"cntrl\">$chr</span>";
1581         }
1582 }
1583
1584 # git may return quoted and escaped filenames
1585 sub unquote {
1586         my $str = shift;
1587
1588         sub unq {
1589                 my $seq = shift;
1590                 my %es = ( # character escape codes, aka escape sequences
1591                         't' => "\t",   # tab            (HT, TAB)
1592                         'n' => "\n",   # newline        (NL)
1593                         'r' => "\r",   # return         (CR)
1594                         'f' => "\f",   # form feed      (FF)
1595                         'b' => "\b",   # backspace      (BS)
1596                         'a' => "\a",   # alarm (bell)   (BEL)
1597                         'e' => "\e",   # escape         (ESC)
1598                         'v' => "\013", # vertical tab   (VT)
1599                 );
1600
1601                 if ($seq =~ m/^[0-7]{1,3}$/) {
1602                         # octal char sequence
1603                         return chr(oct($seq));
1604                 } elsif (exists $es{$seq}) {
1605                         # C escape sequence, aka character escape code
1606                         return $es{$seq};
1607                 }
1608                 # quoted ordinary character
1609                 return $seq;
1610         }
1611
1612         if ($str =~ m/^"(.*)"$/) {
1613                 # needs unquoting
1614                 $str = $1;
1615                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1616         }
1617         return $str;
1618 }
1619
1620 # escape tabs (convert tabs to spaces)
1621 sub untabify {
1622         my $line = shift;
1623
1624         while ((my $pos = index($line, "\t")) != -1) {
1625                 if (my $count = (8 - ($pos % 8))) {
1626                         my $spaces = ' ' x $count;
1627                         $line =~ s/\t/$spaces/;
1628                 }
1629         }
1630
1631         return $line;
1632 }
1633
1634 sub project_in_list {
1635         my $project = shift;
1636         my @list = git_get_projects_list();
1637         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1638 }
1639
1640 ## ----------------------------------------------------------------------
1641 ## HTML aware string manipulation
1642
1643 # Try to chop given string on a word boundary between position
1644 # $len and $len+$add_len. If there is no word boundary there,
1645 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1646 # (marking chopped part) would be longer than given string.
1647 sub chop_str {
1648         my $str = shift;
1649         my $len = shift;
1650         my $add_len = shift || 10;
1651         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1652
1653         # Make sure perl knows it is utf8 encoded so we don't
1654         # cut in the middle of a utf8 multibyte char.
1655         $str = to_utf8($str);
1656
1657         # allow only $len chars, but don't cut a word if it would fit in $add_len
1658         # if it doesn't fit, cut it if it's still longer than the dots we would add
1659         # remove chopped character entities entirely
1660
1661         # when chopping in the middle, distribute $len into left and right part
1662         # return early if chopping wouldn't make string shorter
1663         if ($where eq 'center') {
1664                 return $str if ($len + 5 >= length($str)); # filler is length 5
1665                 $len = int($len/2);
1666         } else {
1667                 return $str if ($len + 4 >= length($str)); # filler is length 4
1668         }
1669
1670         # regexps: ending and beginning with word part up to $add_len
1671         my $endre = qr/.{$len}\w{0,$add_len}/;
1672         my $begre = qr/\w{0,$add_len}.{$len}/;
1673
1674         if ($where eq 'left') {
1675                 $str =~ m/^(.*?)($begre)$/;
1676                 my ($lead, $body) = ($1, $2);
1677                 if (length($lead) > 4) {
1678                         $lead = " ...";
1679                 }
1680                 return "$lead$body";
1681
1682         } elsif ($where eq 'center') {
1683                 $str =~ m/^($endre)(.*)$/;
1684                 my ($left, $str)  = ($1, $2);
1685                 $str =~ m/^(.*?)($begre)$/;
1686                 my ($mid, $right) = ($1, $2);
1687                 if (length($mid) > 5) {
1688                         $mid = " ... ";
1689                 }
1690                 return "$left$mid$right";
1691
1692         } else {
1693                 $str =~ m/^($endre)(.*)$/;
1694                 my $body = $1;
1695                 my $tail = $2;
1696                 if (length($tail) > 4) {
1697                         $tail = "... ";
1698                 }
1699                 return "$body$tail";
1700         }
1701 }
1702
1703 # takes the same arguments as chop_str, but also wraps a <span> around the
1704 # result with a title attribute if it does get chopped. Additionally, the
1705 # string is HTML-escaped.
1706 sub chop_and_escape_str {
1707         my ($str) = @_;
1708
1709         my $chopped = chop_str(@_);
1710         $str = to_utf8($str);
1711         if ($chopped eq $str) {
1712                 return esc_html($chopped);
1713         } else {
1714                 $str =~ s/[[:cntrl:]]/?/g;
1715                 return $cgi->span({-title=>$str}, esc_html($chopped));
1716         }
1717 }
1718
1719 ## ----------------------------------------------------------------------
1720 ## functions returning short strings
1721
1722 # CSS class for given age value (in seconds)
1723 sub age_class {
1724         my $age = shift;
1725
1726         if (!defined $age) {
1727                 return "noage";
1728         } elsif ($age < 60*60*2) {
1729                 return "age0";
1730         } elsif ($age < 60*60*24*2) {
1731                 return "age1";
1732         } else {
1733                 return "age2";
1734         }
1735 }
1736
1737 # convert age in seconds to "nn units ago" string
1738 sub age_string {
1739         my $age = shift;
1740         my $age_str;
1741
1742         if ($age > 60*60*24*365*2) {
1743                 $age_str = (int $age/60/60/24/365);
1744                 $age_str .= " years ago";
1745         } elsif ($age > 60*60*24*(365/12)*2) {
1746                 $age_str = int $age/60/60/24/(365/12);
1747                 $age_str .= " months ago";
1748         } elsif ($age > 60*60*24*7*2) {
1749                 $age_str = int $age/60/60/24/7;
1750                 $age_str .= " weeks ago";
1751         } elsif ($age > 60*60*24*2) {
1752                 $age_str = int $age/60/60/24;
1753                 $age_str .= " days ago";
1754         } elsif ($age > 60*60*2) {
1755                 $age_str = int $age/60/60;
1756                 $age_str .= " hours ago";
1757         } elsif ($age > 60*2) {
1758                 $age_str = int $age/60;
1759                 $age_str .= " min ago";
1760         } elsif ($age > 2) {
1761                 $age_str = int $age;
1762                 $age_str .= " sec ago";
1763         } else {
1764                 $age_str .= " right now";
1765         }
1766         return $age_str;
1767 }
1768
1769 use constant {
1770         S_IFINVALID => 0030000,
1771         S_IFGITLINK => 0160000,
1772 };
1773
1774 # submodule/subproject, a commit object reference
1775 sub S_ISGITLINK {
1776         my $mode = shift;
1777
1778         return (($mode & S_IFMT) == S_IFGITLINK)
1779 }
1780
1781 # convert file mode in octal to symbolic file mode string
1782 sub mode_str {
1783         my $mode = oct shift;
1784
1785         if (S_ISGITLINK($mode)) {
1786                 return 'm---------';
1787         } elsif (S_ISDIR($mode & S_IFMT)) {
1788                 return 'drwxr-xr-x';
1789         } elsif (S_ISLNK($mode)) {
1790                 return 'lrwxrwxrwx';
1791         } elsif (S_ISREG($mode)) {
1792                 # git cares only about the executable bit
1793                 if ($mode & S_IXUSR) {
1794                         return '-rwxr-xr-x';
1795                 } else {
1796                         return '-rw-r--r--';
1797                 };
1798         } else {
1799                 return '----------';
1800         }
1801 }
1802
1803 # convert file mode in octal to file type string
1804 sub file_type {
1805         my $mode = shift;
1806
1807         if ($mode !~ m/^[0-7]+$/) {
1808                 return $mode;
1809         } else {
1810                 $mode = oct $mode;
1811         }
1812
1813         if (S_ISGITLINK($mode)) {
1814                 return "submodule";
1815         } elsif (S_ISDIR($mode & S_IFMT)) {
1816                 return "directory";
1817         } elsif (S_ISLNK($mode)) {
1818                 return "symlink";
1819         } elsif (S_ISREG($mode)) {
1820                 return "file";
1821         } else {
1822                 return "unknown";
1823         }
1824 }
1825
1826 # convert file mode in octal to file type description string
1827 sub file_type_long {
1828         my $mode = shift;
1829
1830         if ($mode !~ m/^[0-7]+$/) {
1831                 return $mode;
1832         } else {
1833                 $mode = oct $mode;
1834         }
1835
1836         if (S_ISGITLINK($mode)) {
1837                 return "submodule";
1838         } elsif (S_ISDIR($mode & S_IFMT)) {
1839                 return "directory";
1840         } elsif (S_ISLNK($mode)) {
1841                 return "symlink";
1842         } elsif (S_ISREG($mode)) {
1843                 if ($mode & S_IXUSR) {
1844                         return "executable";
1845                 } else {
1846                         return "file";
1847                 };
1848         } else {
1849                 return "unknown";
1850         }
1851 }
1852
1853
1854 ## ----------------------------------------------------------------------
1855 ## functions returning short HTML fragments, or transforming HTML fragments
1856 ## which don't belong to other sections
1857
1858 # format line of commit message.
1859 sub format_log_line_html {
1860         my $line = shift;
1861
1862         $line = esc_html($line, -nbsp=>1);
1863         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1864                 $cgi->a({-href => href(action=>"object", hash=>$1),
1865                                         -class => "text"}, $1);
1866         }eg;
1867
1868         return $line;
1869 }
1870
1871 # format marker of refs pointing to given object
1872
1873 # the destination action is chosen based on object type and current context:
1874 # - for annotated tags, we choose the tag view unless it's the current view
1875 #   already, in which case we go to shortlog view
1876 # - for other refs, we keep the current view if we're in history, shortlog or
1877 #   log view, and select shortlog otherwise
1878 sub format_ref_marker {
1879         my ($refs, $id) = @_;
1880         my $markers = '';
1881
1882         if (defined $refs->{$id}) {
1883                 foreach my $ref (@{$refs->{$id}}) {
1884                         # this code exploits the fact that non-lightweight tags are the
1885                         # only indirect objects, and that they are the only objects for which
1886                         # we want to use tag instead of shortlog as action
1887                         my ($type, $name) = qw();
1888                         my $indirect = ($ref =~ s/\^\{\}$//);
1889                         # e.g. tags/v2.6.11 or heads/next
1890                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1891                                 $type = $1;
1892                                 $name = $2;
1893                         } else {
1894                                 $type = "ref";
1895                                 $name = $ref;
1896                         }
1897
1898                         my $class = $type;
1899                         $class .= " indirect" if $indirect;
1900
1901                         my $dest_action = "shortlog";
1902
1903                         if ($indirect) {
1904                                 $dest_action = "tag" unless $action eq "tag";
1905                         } elsif ($action =~ /^(history|(short)?log)$/) {
1906                                 $dest_action = $action;
1907                         }
1908
1909                         my $dest = "";
1910                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1911                         $dest .= $ref;
1912
1913                         my $link = $cgi->a({
1914                                 -href => href(
1915                                         action=>$dest_action,
1916                                         hash=>$dest
1917                                 )}, $name);
1918
1919                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1920                                 $link . "</span>";
1921                 }
1922         }
1923
1924         if ($markers) {
1925                 return ' <span class="refs">'. $markers . '</span>';
1926         } else {
1927                 return "";
1928         }
1929 }
1930
1931 # format, perhaps shortened and with markers, title line
1932 sub format_subject_html {
1933         my ($long, $short, $href, $extra) = @_;
1934         $extra = '' unless defined($extra);
1935
1936         if (length($short) < length($long)) {
1937                 $long =~ s/[[:cntrl:]]/?/g;
1938                 return $cgi->a({-href => $href, -class => "list subject",
1939                                 -title => to_utf8($long)},
1940                        esc_html($short)) . $extra;
1941         } else {
1942                 return $cgi->a({-href => $href, -class => "list subject"},
1943                        esc_html($long)) . $extra;
1944         }
1945 }
1946
1947 # Rather than recomputing the url for an email multiple times, we cache it
1948 # after the first hit. This gives a visible benefit in views where the avatar
1949 # for the same email is used repeatedly (e.g. shortlog).
1950 # The cache is shared by all avatar engines (currently gravatar only), which
1951 # are free to use it as preferred. Since only one avatar engine is used for any
1952 # given page, there's no risk for cache conflicts.
1953 our %avatar_cache = ();
1954
1955 # Compute the picon url for a given email, by using the picon search service over at
1956 # http://www.cs.indiana.edu/picons/search.html
1957 sub picon_url {
1958         my $email = lc shift;
1959         if (!$avatar_cache{$email}) {
1960                 my ($user, $domain) = split('@', $email);
1961                 $avatar_cache{$email} =
1962                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1963                         "$domain/$user/" .
1964                         "users+domains+unknown/up/single";
1965         }
1966         return $avatar_cache{$email};
1967 }
1968
1969 # Compute the gravatar url for a given email, if it's not in the cache already.
1970 # Gravatar stores only the part of the URL before the size, since that's the
1971 # one computationally more expensive. This also allows reuse of the cache for
1972 # different sizes (for this particular engine).
1973 sub gravatar_url {
1974         my $email = lc shift;
1975         my $size = shift;
1976         $avatar_cache{$email} ||=
1977                 "http://www.gravatar.com/avatar/" .
1978                         Digest::MD5::md5_hex($email) . "?s=";
1979         return $avatar_cache{$email} . $size;
1980 }
1981
1982 # Insert an avatar for the given $email at the given $size if the feature
1983 # is enabled.
1984 sub git_get_avatar {
1985         my ($email, %opts) = @_;
1986         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1987         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1988         $opts{-size} ||= 'default';
1989         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1990         my $url = "";
1991         if ($git_avatar eq 'gravatar') {
1992                 $url = gravatar_url($email, $size);
1993         } elsif ($git_avatar eq 'picon') {
1994                 $url = picon_url($email);
1995         }
1996         # Other providers can be added by extending the if chain, defining $url
1997         # as needed. If no variant puts something in $url, we assume avatars
1998         # are completely disabled/unavailable.
1999         if ($url) {
2000                 return $pre_white .
2001                        "<img width=\"$size\" " .
2002                             "class=\"avatar\" " .
2003                             "src=\"".esc_url($url)."\" " .
2004                             "alt=\"\" " .
2005                        "/>" . $post_white;
2006         } else {
2007                 return "";
2008         }
2009 }
2010
2011 sub format_search_author {
2012         my ($author, $searchtype, $displaytext) = @_;
2013         my $have_search = gitweb_check_feature('search');
2014
2015         if ($have_search) {
2016                 my $performed = "";
2017                 if ($searchtype eq 'author') {
2018                         $performed = "authored";
2019                 } elsif ($searchtype eq 'committer') {
2020                         $performed = "committed";
2021                 }
2022
2023                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2024                                 searchtext=>$author,
2025                                 searchtype=>$searchtype), class=>"list",
2026                                 title=>"Search for commits $performed by $author"},
2027                                 $displaytext);
2028
2029         } else {
2030                 return $displaytext;
2031         }
2032 }
2033
2034 # format the author name of the given commit with the given tag
2035 # the author name is chopped and escaped according to the other
2036 # optional parameters (see chop_str).
2037 sub format_author_html {
2038         my $tag = shift;
2039         my $co = shift;
2040         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2041         return "<$tag class=\"author\">" .
2042                format_search_author($co->{'author_name'}, "author",
2043                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2044                        $author) .
2045                "</$tag>";
2046 }
2047
2048 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2049 sub format_git_diff_header_line {
2050         my $line = shift;
2051         my $diffinfo = shift;
2052         my ($from, $to) = @_;
2053
2054         if ($diffinfo->{'nparents'}) {
2055                 # combined diff
2056                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2057                 if ($to->{'href'}) {
2058                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2059                                          esc_path($to->{'file'}));
2060                 } else { # file was deleted (no href)
2061                         $line .= esc_path($to->{'file'});
2062                 }
2063         } else {
2064                 # "ordinary" diff
2065                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2066                 if ($from->{'href'}) {
2067                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2068                                          'a/' . esc_path($from->{'file'}));
2069                 } else { # file was added (no href)
2070                         $line .= 'a/' . esc_path($from->{'file'});
2071                 }
2072                 $line .= ' ';
2073                 if ($to->{'href'}) {
2074                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2075                                          'b/' . esc_path($to->{'file'}));
2076                 } else { # file was deleted
2077                         $line .= 'b/' . esc_path($to->{'file'});
2078                 }
2079         }
2080
2081         return "<div class=\"diff header\">$line</div>\n";
2082 }
2083
2084 # format extended diff header line, before patch itself
2085 sub format_extended_diff_header_line {
2086         my $line = shift;
2087         my $diffinfo = shift;
2088         my ($from, $to) = @_;
2089
2090         # match <path>
2091         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2092                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2093                                        esc_path($from->{'file'}));
2094         }
2095         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2096                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2097                                  esc_path($to->{'file'}));
2098         }
2099         # match single <mode>
2100         if ($line =~ m/\s(\d{6})$/) {
2101                 $line .= '<span class="info"> (' .
2102                          file_type_long($1) .
2103                          ')</span>';
2104         }
2105         # match <hash>
2106         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2107                 # can match only for combined diff
2108                 $line = 'index ';
2109                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2110                         if ($from->{'href'}[$i]) {
2111                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2112                                                   -class=>"hash"},
2113                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2114                         } else {
2115                                 $line .= '0' x 7;
2116                         }
2117                         # separator
2118                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2119                 }
2120                 $line .= '..';
2121                 if ($to->{'href'}) {
2122                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2123                                          substr($diffinfo->{'to_id'},0,7));
2124                 } else {
2125                         $line .= '0' x 7;
2126                 }
2127
2128         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2129                 # can match only for ordinary diff
2130                 my ($from_link, $to_link);
2131                 if ($from->{'href'}) {
2132                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2133                                              substr($diffinfo->{'from_id'},0,7));
2134                 } else {
2135                         $from_link = '0' x 7;
2136                 }
2137                 if ($to->{'href'}) {
2138                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2139                                            substr($diffinfo->{'to_id'},0,7));
2140                 } else {
2141                         $to_link = '0' x 7;
2142                 }
2143                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2144                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2145         }
2146
2147         return $line . "<br/>\n";
2148 }
2149
2150 # format from-file/to-file diff header
2151 sub format_diff_from_to_header {
2152         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2153         my $line;
2154         my $result = '';
2155
2156         $line = $from_line;
2157         #assert($line =~ m/^---/) if DEBUG;
2158         # no extra formatting for "^--- /dev/null"
2159         if (! $diffinfo->{'nparents'}) {
2160                 # ordinary (single parent) diff
2161                 if ($line =~ m!^--- "?a/!) {
2162                         if ($from->{'href'}) {
2163                                 $line = '--- a/' .
2164                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2165                                                 esc_path($from->{'file'}));
2166                         } else {
2167                                 $line = '--- a/' .
2168                                         esc_path($from->{'file'});
2169                         }
2170                 }
2171                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2172
2173         } else {
2174                 # combined diff (merge commit)
2175                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2176                         if ($from->{'href'}[$i]) {
2177                                 $line = '--- ' .
2178                                         $cgi->a({-href=>href(action=>"blobdiff",
2179                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2180                                                              hash_parent_base=>$parents[$i],
2181                                                              file_parent=>$from->{'file'}[$i],
2182                                                              hash=>$diffinfo->{'to_id'},
2183                                                              hash_base=>$hash,
2184                                                              file_name=>$to->{'file'}),
2185                                                  -class=>"path",
2186                                                  -title=>"diff" . ($i+1)},
2187                                                 $i+1) .
2188                                         '/' .
2189                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2190                                                 esc_path($from->{'file'}[$i]));
2191                         } else {
2192                                 $line = '--- /dev/null';
2193                         }
2194                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2195                 }
2196         }
2197
2198         $line = $to_line;
2199         #assert($line =~ m/^\+\+\+/) if DEBUG;
2200         # no extra formatting for "^+++ /dev/null"
2201         if ($line =~ m!^\+\+\+ "?b/!) {
2202                 if ($to->{'href'}) {
2203                         $line = '+++ b/' .
2204                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2205                                         esc_path($to->{'file'}));
2206                 } else {
2207                         $line = '+++ b/' .
2208                                 esc_path($to->{'file'});
2209                 }
2210         }
2211         $result .= qq!<div class="diff to_file">$line</div>\n!;
2212
2213         return $result;
2214 }
2215
2216 # create note for patch simplified by combined diff
2217 sub format_diff_cc_simplified {
2218         my ($diffinfo, @parents) = @_;
2219         my $result = '';
2220
2221         $result .= "<div class=\"diff header\">" .
2222                    "diff --cc ";
2223         if (!is_deleted($diffinfo)) {
2224                 $result .= $cgi->a({-href => href(action=>"blob",
2225                                                   hash_base=>$hash,
2226                                                   hash=>$diffinfo->{'to_id'},
2227                                                   file_name=>$diffinfo->{'to_file'}),
2228                                     -class => "path"},
2229                                    esc_path($diffinfo->{'to_file'}));
2230         } else {
2231                 $result .= esc_path($diffinfo->{'to_file'});
2232         }
2233         $result .= "</div>\n" . # class="diff header"
2234                    "<div class=\"diff nodifferences\">" .
2235                    "Simple merge" .
2236                    "</div>\n"; # class="diff nodifferences"
2237
2238         return $result;
2239 }
2240
2241 sub diff_line_class {
2242         my ($line, $from, $to) = @_;
2243
2244         # ordinary diff
2245         my $num_sign = 1;
2246         # combined diff
2247         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2248                 $num_sign = scalar @{$from->{'href'}};
2249         }
2250
2251         my @diff_line_classifier = (
2252                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2253                 { regexp => qr/^\\/,               class => "incomplete"  },
2254                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2255                 # classifier for context must come before classifier add/rem,
2256                 # or we would have to use more complicated regexp, for example
2257                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2258                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2259                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2260         );
2261         for my $clsfy (@diff_line_classifier) {
2262                 return $clsfy->{'class'}
2263                         if ($line =~ $clsfy->{'regexp'});
2264         }
2265
2266         # fallback
2267         return "";
2268 }
2269
2270 # assumes that $from and $to are defined and correctly filled,
2271 # and that $line holds a line of chunk header for unified diff
2272 sub format_unidiff_chunk_header {
2273         my ($line, $from, $to) = @_;
2274
2275         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2276                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2277
2278         $from_lines = 0 unless defined $from_lines;
2279         $to_lines   = 0 unless defined $to_lines;
2280
2281         if ($from->{'href'}) {
2282                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2283                                      -class=>"list"}, $from_text);
2284         }
2285         if ($to->{'href'}) {
2286                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2287                                      -class=>"list"}, $to_text);
2288         }
2289         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2290                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2291         return $line;
2292 }
2293
2294 # assumes that $from and $to are defined and correctly filled,
2295 # and that $line holds a line of chunk header for combined diff
2296 sub format_cc_diff_chunk_header {
2297         my ($line, $from, $to) = @_;
2298
2299         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2300         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2301
2302         @from_text = split(' ', $ranges);
2303         for (my $i = 0; $i < @from_text; ++$i) {
2304                 ($from_start[$i], $from_nlines[$i]) =
2305                         (split(',', substr($from_text[$i], 1)), 0);
2306         }
2307
2308         $to_text   = pop @from_text;
2309         $to_start  = pop @from_start;
2310         $to_nlines = pop @from_nlines;
2311
2312         $line = "<span class=\"chunk_info\">$prefix ";
2313         for (my $i = 0; $i < @from_text; ++$i) {
2314                 if ($from->{'href'}[$i]) {
2315                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2316                                           -class=>"list"}, $from_text[$i]);
2317                 } else {
2318                         $line .= $from_text[$i];
2319                 }
2320                 $line .= " ";
2321         }
2322         if ($to->{'href'}) {
2323                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2324                                   -class=>"list"}, $to_text);
2325         } else {
2326                 $line .= $to_text;
2327         }
2328         $line .= " $prefix</span>" .
2329                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2330         return $line;
2331 }
2332
2333 # process patch (diff) line (not to be used for diff headers),
2334 # returning class and HTML-formatted (but not wrapped) line
2335 sub process_diff_line {
2336         my $line = shift;
2337         my ($from, $to) = @_;
2338
2339         my $diff_class = diff_line_class($line, $from, $to);
2340
2341         chomp $line;
2342         $line = untabify($line);
2343
2344         if ($from && $to && $line =~ m/^\@{2} /) {
2345                 $line = format_unidiff_chunk_header($line, $from, $to);
2346                 return $diff_class, $line;
2347
2348         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2349                 $line = format_cc_diff_chunk_header($line, $from, $to);
2350                 return $diff_class, $line;
2351
2352         }
2353         return $diff_class, esc_html($line, -nbsp=>1);
2354 }
2355
2356 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2357 # linked.  Pass the hash of the tree/commit to snapshot.
2358 sub format_snapshot_links {
2359         my ($hash) = @_;
2360         my $num_fmts = @snapshot_fmts;
2361         if ($num_fmts > 1) {
2362                 # A parenthesized list of links bearing format names.
2363                 # e.g. "snapshot (_tar.gz_ _zip_)"
2364                 return "snapshot (" . join(' ', map
2365                         $cgi->a({
2366                                 -href => href(
2367                                         action=>"snapshot",
2368                                         hash=>$hash,
2369                                         snapshot_format=>$_
2370                                 )
2371                         }, $known_snapshot_formats{$_}{'display'})
2372                 , @snapshot_fmts) . ")";
2373         } elsif ($num_fmts == 1) {
2374                 # A single "snapshot" link whose tooltip bears the format name.
2375                 # i.e. "_snapshot_"
2376                 my ($fmt) = @snapshot_fmts;
2377                 return
2378                         $cgi->a({
2379                                 -href => href(
2380                                         action=>"snapshot",
2381                                         hash=>$hash,
2382                                         snapshot_format=>$fmt
2383                                 ),
2384                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2385                         }, "snapshot");
2386         } else { # $num_fmts == 0
2387                 return undef;
2388         }
2389 }
2390
2391 ## ......................................................................
2392 ## functions returning values to be passed, perhaps after some
2393 ## transformation, to other functions; e.g. returning arguments to href()
2394
2395 # returns hash to be passed to href to generate gitweb URL
2396 # in -title key it returns description of link
2397 sub get_feed_info {
2398         my $format = shift || 'Atom';
2399         my %res = (action => lc($format));
2400
2401         # feed links are possible only for project views
2402         return unless (defined $project);
2403         # some views should link to OPML, or to generic project feed,
2404         # or don't have specific feed yet (so they should use generic)
2405         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2406
2407         my $branch;
2408         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2409         # from tag links; this also makes possible to detect branch links
2410         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2411             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2412                 $branch = $1;
2413         }
2414         # find log type for feed description (title)
2415         my $type = 'log';
2416         if (defined $file_name) {
2417                 $type  = "history of $file_name";
2418                 $type .= "/" if ($action eq 'tree');
2419                 $type .= " on '$branch'" if (defined $branch);
2420         } else {
2421                 $type = "log of $branch" if (defined $branch);
2422         }
2423
2424         $res{-title} = $type;
2425         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2426         $res{'file_name'} = $file_name;
2427
2428         return %res;
2429 }
2430
2431 ## ----------------------------------------------------------------------
2432 ## git utility subroutines, invoking git commands
2433
2434 # returns path to the core git executable and the --git-dir parameter as list
2435 sub git_cmd {
2436         $number_of_git_cmds++;
2437         return $GIT, '--git-dir='.$git_dir;
2438 }
2439
2440 # quote the given arguments for passing them to the shell
2441 # quote_command("command", "arg 1", "arg with ' and ! characters")
2442 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2443 # Try to avoid using this function wherever possible.
2444 sub quote_command {
2445         return join(' ',
2446                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2447 }
2448
2449 # get HEAD ref of given project as hash
2450 sub git_get_head_hash {
2451         return git_get_full_hash(shift, 'HEAD');
2452 }
2453
2454 sub git_get_full_hash {
2455         return git_get_hash(@_);
2456 }
2457
2458 sub git_get_short_hash {
2459         return git_get_hash(@_, '--short=7');
2460 }
2461
2462 sub git_get_hash {
2463         my ($project, $hash, @options) = @_;
2464         my $o_git_dir = $git_dir;
2465         my $retval = undef;
2466         $git_dir = "$projectroot/$project";
2467         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2468             '--verify', '-q', @options, $hash) {
2469                 $retval = <$fd>;
2470                 chomp $retval if defined $retval;
2471                 close $fd;
2472         }
2473         if (defined $o_git_dir) {
2474                 $git_dir = $o_git_dir;
2475         }
2476         return $retval;
2477 }
2478
2479 # get type of given object
2480 sub git_get_type {
2481         my $hash = shift;
2482
2483         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2484         my $type = <$fd>;
2485         close $fd or return;
2486         chomp $type;
2487         return $type;
2488 }
2489
2490 # repository configuration
2491 our $config_file = '';
2492 our %config;
2493
2494 # store multiple values for single key as anonymous array reference
2495 # single values stored directly in the hash, not as [ <value> ]
2496 sub hash_set_multi {
2497         my ($hash, $key, $value) = @_;
2498
2499         if (!exists $hash->{$key}) {
2500                 $hash->{$key} = $value;
2501         } elsif (!ref $hash->{$key}) {
2502                 $hash->{$key} = [ $hash->{$key}, $value ];
2503         } else {
2504                 push @{$hash->{$key}}, $value;
2505         }
2506 }
2507
2508 # return hash of git project configuration
2509 # optionally limited to some section, e.g. 'gitweb'
2510 sub git_parse_project_config {
2511         my $section_regexp = shift;
2512         my %config;
2513
2514         local $/ = "\0";
2515
2516         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2517                 or return;
2518
2519         while (my $keyval = <$fh>) {
2520                 chomp $keyval;
2521                 my ($key, $value) = split(/\n/, $keyval, 2);
2522
2523                 hash_set_multi(\%config, $key, $value)
2524                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2525         }
2526         close $fh;
2527
2528         return %config;
2529 }
2530
2531 # convert config value to boolean: 'true' or 'false'
2532 # no value, number > 0, 'true' and 'yes' values are true
2533 # rest of values are treated as false (never as error)
2534 sub config_to_bool {
2535         my $val = shift;
2536
2537         return 1 if !defined $val;             # section.key
2538
2539         # strip leading and trailing whitespace
2540         $val =~ s/^\s+//;
2541         $val =~ s/\s+$//;
2542
2543         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2544                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2545 }
2546
2547 # convert config value to simple decimal number
2548 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2549 # to be multiplied by 1024, 1048576, or 1073741824
2550 sub config_to_int {
2551         my $val = shift;
2552
2553         # strip leading and trailing whitespace
2554         $val =~ s/^\s+//;
2555         $val =~ s/\s+$//;
2556
2557         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2558                 $unit = lc($unit);
2559                 # unknown unit is treated as 1
2560                 return $num * ($unit eq 'g' ? 1073741824 :
2561                                $unit eq 'm' ?    1048576 :
2562                                $unit eq 'k' ?       1024 : 1);
2563         }
2564         return $val;
2565 }
2566
2567 # convert config value to array reference, if needed
2568 sub config_to_multi {
2569         my $val = shift;
2570
2571         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2572 }
2573
2574 sub git_get_project_config {
2575         my ($key, $type) = @_;
2576
2577         return unless defined $git_dir;
2578
2579         # key sanity check
2580         return unless ($key);
2581         # only subsection, if exists, is case sensitive,
2582         # and not lowercased by 'git config -z -l'
2583         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2584                 $key = join(".", lc($hi), $mi, lc($lo));
2585         } else {
2586                 $key = lc($key);
2587         }
2588         $key =~ s/^gitweb\.//;
2589         return if ($key =~ m/\W/);
2590
2591         # type sanity check
2592         if (defined $type) {
2593                 $type =~ s/^--//;
2594                 $type = undef
2595                         unless ($type eq 'bool' || $type eq 'int');
2596         }
2597
2598         # get config
2599         if (!defined $config_file ||
2600             $config_file ne "$git_dir/config") {
2601                 %config = git_parse_project_config('gitweb');
2602                 $config_file = "$git_dir/config";
2603         }
2604
2605         # check if config variable (key) exists
2606         return unless exists $config{"gitweb.$key"};
2607
2608         # ensure given type
2609         if (!defined $type) {
2610                 return $config{"gitweb.$key"};
2611         } elsif ($type eq 'bool') {
2612                 # backward compatibility: 'git config --bool' returns true/false
2613                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2614         } elsif ($type eq 'int') {
2615                 return config_to_int($config{"gitweb.$key"});
2616         }
2617         return $config{"gitweb.$key"};
2618 }
2619
2620 # get hash of given path at given ref
2621 sub git_get_hash_by_path {
2622         my $base = shift;
2623         my $path = shift || return undef;
2624         my $type = shift;
2625
2626         $path =~ s,/+$,,;
2627
2628         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2629                 or die_error(500, "Open git-ls-tree failed");
2630         my $line = <$fd>;
2631         close $fd or return undef;
2632
2633         if (!defined $line) {
2634                 # there is no tree or hash given by $path at $base
2635                 return undef;
2636         }
2637
2638         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2639         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2640         if (defined $type && $type ne $2) {
2641                 # type doesn't match
2642                 return undef;
2643         }
2644         return $3;
2645 }
2646
2647 # get path of entry with given hash at given tree-ish (ref)
2648 # used to get 'from' filename for combined diff (merge commit) for renames
2649 sub git_get_path_by_hash {
2650         my $base = shift || return;
2651         my $hash = shift || return;
2652
2653         local $/ = "\0";
2654
2655         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2656                 or return undef;
2657         while (my $line = <$fd>) {
2658                 chomp $line;
2659
2660                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2661                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2662                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2663                         close $fd;
2664                         return $1;
2665                 }
2666         }
2667         close $fd;
2668         return undef;
2669 }
2670
2671 ## ......................................................................
2672 ## git utility functions, directly accessing git repository
2673
2674 # get the value of config variable either from file named as the variable
2675 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2676 # configuration variable in the repository config file.
2677 sub git_get_file_or_project_config {
2678         my ($path, $name) = @_;
2679
2680         $git_dir = "$projectroot/$path";
2681         open my $fd, '<', "$git_dir/$name"
2682                 or return git_get_project_config($name);
2683         my $conf = <$fd>;
2684         close $fd;
2685         if (defined $conf) {
2686                 chomp $conf;
2687         }
2688         return $conf;
2689 }
2690
2691 sub git_get_project_description {
2692         my $path = shift;
2693         return git_get_file_or_project_config($path, 'description');
2694 }
2695
2696 sub git_get_project_category {
2697         my $path = shift;
2698         return git_get_file_or_project_config($path, 'category');
2699 }
2700
2701
2702 # supported formats:
2703 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2704 #   - if its contents is a number, use it as tag weight,
2705 #   - otherwise add a tag with weight 1
2706 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2707 #   the same value multiple times increases tag weight
2708 # * `gitweb.ctag' multi-valued repo config variable
2709 sub git_get_project_ctags {
2710         my $project = shift;
2711         my $ctags = {};
2712
2713         $git_dir = "$projectroot/$project";
2714         if (opendir my $dh, "$git_dir/ctags") {
2715                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2716                 foreach my $tagfile (@files) {
2717                         open my $ct, '<', $tagfile
2718                                 or next;
2719                         my $val = <$ct>;
2720                         chomp $val if $val;
2721                         close $ct;
2722
2723                         (my $ctag = $tagfile) =~ s#.*/##;
2724                         if ($val =~ /^\d+$/) {
2725                                 $ctags->{$ctag} = $val;
2726                         } else {
2727                                 $ctags->{$ctag} = 1;
2728                         }
2729                 }
2730                 closedir $dh;
2731
2732         } elsif (open my $fh, '<', "$git_dir/ctags") {
2733                 while (my $line = <$fh>) {
2734                         chomp $line;
2735                         $ctags->{$line}++ if $line;
2736                 }
2737                 close $fh;
2738
2739         } else {
2740                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2741                 foreach my $tag (@$taglist) {
2742                         $ctags->{$tag}++;
2743                 }
2744         }
2745
2746         return $ctags;
2747 }
2748
2749 # return hash, where keys are content tags ('ctags'),
2750 # and values are sum of weights of given tag in every project
2751 sub git_gather_all_ctags {
2752         my $projects = shift;
2753         my $ctags = {};
2754
2755         foreach my $p (@$projects) {
2756                 foreach my $ct (keys %{$p->{'ctags'}}) {
2757                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2758                 }
2759         }
2760
2761         return $ctags;
2762 }
2763
2764 sub git_populate_project_tagcloud {
2765         my $ctags = shift;
2766
2767         # First, merge different-cased tags; tags vote on casing
2768         my %ctags_lc;
2769         foreach (keys %$ctags) {
2770                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2771                 if (not $ctags_lc{lc $_}->{topcount}
2772                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2773                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2774                         $ctags_lc{lc $_}->{topname} = $_;
2775                 }
2776         }
2777
2778         my $cloud;
2779         my $matched = $cgi->param('by_tag');
2780         if (eval { require HTML::TagCloud; 1; }) {
2781                 $cloud = HTML::TagCloud->new;
2782                 foreach my $ctag (sort keys %ctags_lc) {
2783                         # Pad the title with spaces so that the cloud looks
2784                         # less crammed.
2785                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2786                         $title =~ s/ /&nbsp;/g;
2787                         $title =~ s/^/&nbsp;/g;
2788                         $title =~ s/$/&nbsp;/g;
2789                         if (defined $matched && $matched eq $ctag) {
2790                                 $title = qq(<span class="match">$title</span>);
2791                         }
2792                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2793                                     $ctags_lc{$ctag}->{count});
2794                 }
2795         } else {
2796                 $cloud = {};
2797                 foreach my $ctag (keys %ctags_lc) {
2798                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2799                         if (defined $matched && $matched eq $ctag) {
2800                                 $title = qq(<span class="match">$title</span>);
2801                         }
2802                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2803                         $cloud->{$ctag}{ctag} =
2804                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2805                 }
2806         }
2807         return $cloud;
2808 }
2809
2810 sub git_show_project_tagcloud {
2811         my ($cloud, $count) = @_;
2812         if (ref $cloud eq 'HTML::TagCloud') {
2813                 return $cloud->html_and_css($count);
2814         } else {
2815                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2816                 return
2817                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2818                         join (', ', map {
2819                                 $cloud->{$_}->{'ctag'}
2820                         } splice(@tags, 0, $count)) .
2821                         '</div>';
2822         }
2823 }
2824
2825 sub git_get_project_url_list {
2826         my $path = shift;
2827
2828         $git_dir = "$projectroot/$path";
2829         open my $fd, '<', "$git_dir/cloneurl"
2830                 or return wantarray ?
2831                 @{ config_to_multi(git_get_project_config('url')) } :
2832                    config_to_multi(git_get_project_config('url'));
2833         my @git_project_url_list = map { chomp; $_ } <$fd>;
2834         close $fd;
2835
2836         return wantarray ? @git_project_url_list : \@git_project_url_list;
2837 }
2838
2839 sub git_get_projects_list {
2840         my $filter = shift || '';
2841         my $paranoid = shift;
2842         my @list;
2843
2844         if (-d $projects_list) {
2845                 # search in directory
2846                 my $dir = $projects_list;
2847                 # remove the trailing "/"
2848                 $dir =~ s!/+$!!;
2849                 my $pfxlen = length("$dir");
2850                 my $pfxdepth = ($dir =~ tr!/!!);
2851                 # when filtering, search only given subdirectory
2852                 if ($filter && !$paranoid) {
2853                         $dir .= "/$filter";
2854                         $dir =~ s!/+$!!;
2855                 }
2856
2857                 File::Find::find({
2858                         follow_fast => 1, # follow symbolic links
2859                         follow_skip => 2, # ignore duplicates
2860                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2861                         wanted => sub {
2862                                 # global variables
2863                                 our $project_maxdepth;
2864                                 our $projectroot;
2865                                 # skip project-list toplevel, if we get it.
2866                                 return if (m!^[/.]$!);
2867                                 # only directories can be git repositories
2868                                 return unless (-d $_);
2869                                 # don't traverse too deep (Find is super slow on os x)
2870                                 # $project_maxdepth excludes depth of $projectroot
2871                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2872                                         $File::Find::prune = 1;
2873                                         return;
2874                                 }
2875
2876                                 my $path = substr($File::Find::name, $pfxlen + 1);
2877                                 # paranoidly only filter here
2878                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2879                                         next;
2880                                 }
2881                                 # we check related file in $projectroot
2882                                 if (check_export_ok("$projectroot/$path")) {
2883                                         push @list, { path => $path };
2884                                         $File::Find::prune = 1;
2885                                 }
2886                         },
2887                 }, "$dir");
2888
2889         } elsif (-f $projects_list) {
2890                 # read from file(url-encoded):
2891                 # 'git%2Fgit.git Linus+Torvalds'
2892                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2893                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2894                 open my $fd, '<', $projects_list or return;
2895         PROJECT:
2896                 while (my $line = <$fd>) {
2897                         chomp $line;
2898                         my ($path, $owner) = split ' ', $line;
2899                         $path = unescape($path);
2900                         $owner = unescape($owner);
2901                         if (!defined $path) {
2902                                 next;
2903                         }
2904                         # if $filter is rpovided, check if $path begins with $filter
2905                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2906                                 next;
2907                         }
2908                         if (check_export_ok("$projectroot/$path")) {
2909                                 my $pr = {
2910                                         path => $path,
2911                                         owner => to_utf8($owner),
2912                                 };
2913                                 push @list, $pr;
2914                         }
2915                 }
2916                 close $fd;
2917         }
2918         return @list;
2919 }
2920
2921 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2922 # as side effects it sets 'forks' field to list of forks for forked projects
2923 sub filter_forks_from_projects_list {
2924         my $projects = shift;
2925
2926         my %trie; # prefix tree of directories (path components)
2927         # generate trie out of those directories that might contain forks
2928         foreach my $pr (@$projects) {
2929                 my $path = $pr->{'path'};
2930                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2931                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2932                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2933                 next unless (-d "$projectroot/$path"); # containing directory exists
2934                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2935
2936                 # add to trie
2937                 my @dirs = split('/', $path);
2938                 # walk the trie, until either runs out of components or out of trie
2939                 my $ref = \%trie;
2940                 while (scalar @dirs &&
2941                        exists($ref->{$dirs[0]})) {
2942                         $ref = $ref->{shift @dirs};
2943                 }
2944                 # create rest of trie structure from rest of components
2945                 foreach my $dir (@dirs) {
2946                         $ref = $ref->{$dir} = {};
2947                 }
2948                 # create end marker, store $pr as a data
2949                 $ref->{''} = $pr if (!exists $ref->{''});
2950         }
2951
2952         # filter out forks, by finding shortest prefix match for paths
2953         my @filtered;
2954  PROJECT:
2955         foreach my $pr (@$projects) {
2956                 # trie lookup
2957                 my $ref = \%trie;
2958         DIR:
2959                 foreach my $dir (split('/', $pr->{'path'})) {
2960                         if (exists $ref->{''}) {
2961                                 # found [shortest] prefix, is a fork - skip it
2962                                 push @{$ref->{''}{'forks'}}, $pr;
2963                                 next PROJECT;
2964                         }
2965                         if (!exists $ref->{$dir}) {
2966                                 # not in trie, cannot have prefix, not a fork
2967                                 push @filtered, $pr;
2968                                 next PROJECT;
2969                         }
2970                         # If the dir is there, we just walk one step down the trie.
2971                         $ref = $ref->{$dir};
2972                 }
2973                 # we ran out of trie
2974                 # (shouldn't happen: it's either no match, or end marker)
2975                 push @filtered, $pr;
2976         }
2977
2978         return @filtered;
2979 }
2980
2981 # note: fill_project_list_info must be run first,
2982 # for 'descr_long' and 'ctags' to be filled
2983 sub search_projects_list {
2984         my ($projlist, %opts) = @_;
2985         my $tagfilter  = $opts{'tagfilter'};
2986         my $searchtext = $opts{'searchtext'};
2987
2988         return @$projlist
2989                 unless ($tagfilter || $searchtext);
2990
2991         my @projects;
2992  PROJECT:
2993         foreach my $pr (@$projlist) {
2994
2995                 if ($tagfilter) {
2996                         next unless ref($pr->{'ctags'}) eq 'HASH';
2997                         next unless
2998                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2999                 }
3000
3001                 if ($searchtext) {
3002                         next unless
3003                                 $pr->{'path'} =~ /$searchtext/ ||
3004                                 $pr->{'descr_long'} =~ /$searchtext/;
3005                 }
3006
3007                 push @projects, $pr;
3008         }
3009
3010         return @projects;
3011 }
3012
3013 our $gitweb_project_owner = undef;
3014 sub git_get_project_list_from_file {
3015
3016         return if (defined $gitweb_project_owner);
3017
3018         $gitweb_project_owner = {};
3019         # read from file (url-encoded):
3020         # 'git%2Fgit.git Linus+Torvalds'
3021         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3022         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3023         if (-f $projects_list) {
3024                 open(my $fd, '<', $projects_list);
3025                 while (my $line = <$fd>) {
3026                         chomp $line;
3027                         my ($pr, $ow) = split ' ', $line;
3028                         $pr = unescape($pr);
3029                         $ow = unescape($ow);
3030                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3031                 }
3032                 close $fd;
3033         }
3034 }
3035
3036 sub git_get_project_owner {
3037         my $project = shift;
3038         my $owner;
3039
3040         return undef unless $project;
3041         $git_dir = "$projectroot/$project";
3042
3043         if (!defined $gitweb_project_owner) {
3044                 git_get_project_list_from_file();
3045         }
3046
3047         if (exists $gitweb_project_owner->{$project}) {
3048                 $owner = $gitweb_project_owner->{$project};
3049         }
3050         if (!defined $owner){
3051                 $owner = git_get_project_config('owner');
3052         }
3053         if (!defined $owner) {
3054                 $owner = get_file_owner("$git_dir");
3055         }
3056
3057         return $owner;
3058 }
3059
3060 sub git_get_last_activity {
3061         my ($path) = @_;
3062         my $fd;
3063
3064         $git_dir = "$projectroot/$path";
3065         open($fd, "-|", git_cmd(), 'for-each-ref',
3066              '--format=%(committer)',
3067              '--sort=-committerdate',
3068              '--count=1',
3069              'refs/heads') or return;
3070         my $most_recent = <$fd>;
3071         close $fd or return;
3072         if (defined $most_recent &&
3073             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3074                 my $timestamp = $1;
3075                 my $age = time - $timestamp;
3076                 return ($age, age_string($age));
3077         }
3078         return (undef, undef);
3079 }
3080
3081 # Implementation note: when a single remote is wanted, we cannot use 'git
3082 # remote show -n' because that command always work (assuming it's a remote URL
3083 # if it's not defined), and we cannot use 'git remote show' because that would
3084 # try to make a network roundtrip. So the only way to find if that particular
3085 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3086 # and when we find what we want.
3087 sub git_get_remotes_list {
3088         my $wanted = shift;
3089         my %remotes = ();
3090
3091         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3092         return unless $fd;
3093         while (my $remote = <$fd>) {
3094                 chomp $remote;
3095                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3096                 next if $wanted and not $remote eq $wanted;
3097                 my ($url, $key) = ($1, $2);
3098
3099                 $remotes{$remote} ||= { 'heads' => () };
3100                 $remotes{$remote}{$key} = $url;
3101         }
3102         close $fd or return;
3103         return wantarray ? %remotes : \%remotes;
3104 }
3105
3106 # Takes a hash of remotes as first parameter and fills it by adding the
3107 # available remote heads for each of the indicated remotes.
3108 sub fill_remote_heads {
3109         my $remotes = shift;
3110         my @heads = map { "remotes/$_" } keys %$remotes;
3111         my @remoteheads = git_get_heads_list(undef, @heads);
3112         foreach my $remote (keys %$remotes) {
3113                 $remotes->{$remote}{'heads'} = [ grep {
3114                         $_->{'name'} =~ s!^$remote/!!
3115                         } @remoteheads ];
3116         }
3117 }
3118
3119 sub git_get_references {
3120         my $type = shift || "";
3121         my %refs;
3122         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3123         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3124         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3125                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3126                 or return;
3127
3128         while (my $line = <$fd>) {
3129                 chomp $line;
3130                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3131                         if (defined $refs{$1}) {
3132                                 push @{$refs{$1}}, $2;
3133                         } else {
3134                                 $refs{$1} = [ $2 ];
3135                         }
3136                 }
3137         }
3138         close $fd or return;
3139         return \%refs;
3140 }
3141
3142 sub git_get_rev_name_tags {
3143         my $hash = shift || return undef;
3144
3145         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3146                 or return;
3147         my $name_rev = <$fd>;
3148         close $fd;
3149
3150         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3151                 return $1;
3152         } else {
3153                 # catches also '$hash undefined' output
3154                 return undef;
3155         }
3156 }
3157
3158 ## ----------------------------------------------------------------------
3159 ## parse to hash functions
3160
3161 sub parse_date {
3162         my $epoch = shift;
3163         my $tz = shift || "-0000";
3164
3165         my %date;
3166         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3167         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3168         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3169         $date{'hour'} = $hour;
3170         $date{'minute'} = $min;
3171         $date{'mday'} = $mday;
3172         $date{'day'} = $days[$wday];
3173         $date{'month'} = $months[$mon];
3174         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3175                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3176         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3177                              $mday, $months[$mon], $hour ,$min;
3178         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3179                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3180
3181         my ($tz_sign, $tz_hour, $tz_min) =
3182                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3183         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3184         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3185         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3186         $date{'hour_local'} = $hour;
3187         $date{'minute_local'} = $min;
3188         $date{'tz_local'} = $tz;
3189         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3190                                   1900+$year, $mon+1, $mday,
3191                                   $hour, $min, $sec, $tz);
3192         return %date;
3193 }
3194
3195 sub parse_tag {
3196         my $tag_id = shift;
3197         my %tag;
3198         my @comment;
3199
3200         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3201         $tag{'id'} = $tag_id;
3202         while (my $line = <$fd>) {
3203                 chomp $line;
3204                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3205                         $tag{'object'} = $1;
3206                 } elsif ($line =~ m/^type (.+)$/) {
3207                         $tag{'type'} = $1;
3208                 } elsif ($line =~ m/^tag (.+)$/) {
3209                         $tag{'name'} = $1;
3210                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3211                         $tag{'author'} = $1;
3212                         $tag{'author_epoch'} = $2;
3213                         $tag{'author_tz'} = $3;
3214                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3215                                 $tag{'author_name'}  = $1;
3216                                 $tag{'author_email'} = $2;
3217                         } else {
3218                                 $tag{'author_name'} = $tag{'author'};
3219                         }
3220                 } elsif ($line =~ m/--BEGIN/) {
3221                         push @comment, $line;
3222                         last;
3223                 } elsif ($line eq "") {
3224                         last;
3225                 }
3226         }
3227         push @comment, <$fd>;
3228         $tag{'comment'} = \@comment;
3229         close $fd or return;
3230         if (!defined $tag{'name'}) {
3231                 return
3232         };
3233         return %tag
3234 }
3235
3236 sub parse_commit_text {
3237         my ($commit_text, $withparents) = @_;
3238         my @commit_lines = split '\n', $commit_text;
3239         my %co;
3240
3241         pop @commit_lines; # Remove '\0'
3242
3243         if (! @commit_lines) {
3244                 return;
3245         }
3246
3247         my $header = shift @commit_lines;
3248         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3249                 return;
3250         }
3251         ($co{'id'}, my @parents) = split ' ', $header;
3252         while (my $line = shift @commit_lines) {
3253                 last if $line eq "\n";
3254                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3255                         $co{'tree'} = $1;
3256                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3257                         push @parents, $1;
3258                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3259                         $co{'author'} = to_utf8($1);
3260                         $co{'author_epoch'} = $2;
3261                         $co{'author_tz'} = $3;
3262                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3263                                 $co{'author_name'}  = $1;
3264                                 $co{'author_email'} = $2;
3265                         } else {
3266                                 $co{'author_name'} = $co{'author'};
3267                         }
3268                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3269                         $co{'committer'} = to_utf8($1);
3270                         $co{'committer_epoch'} = $2;
3271                         $co{'committer_tz'} = $3;
3272                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3273                                 $co{'committer_name'}  = $1;
3274                                 $co{'committer_email'} = $2;
3275                         } else {
3276                                 $co{'committer_name'} = $co{'committer'};
3277                         }
3278                 }
3279         }
3280         if (!defined $co{'tree'}) {
3281                 return;
3282         };
3283         $co{'parents'} = \@parents;
3284         $co{'parent'} = $parents[0];
3285
3286         foreach my $title (@commit_lines) {
3287                 $title =~ s/^    //;
3288                 if ($title ne "") {
3289                         $co{'title'} = chop_str($title, 80, 5);
3290                         # remove leading stuff of merges to make the interesting part visible
3291                         if (length($title) > 50) {
3292                                 $title =~ s/^Automatic //;
3293                                 $title =~ s/^merge (of|with) /Merge ... /i;
3294                                 if (length($title) > 50) {
3295                                         $title =~ s/(http|rsync):\/\///;
3296                                 }
3297                                 if (length($title) > 50) {
3298                                         $title =~ s/(master|www|rsync)\.//;
3299                                 }
3300                                 if (length($title) > 50) {
3301                                         $title =~ s/kernel.org:?//;
3302                                 }
3303                                 if (length($title) > 50) {
3304                                         $title =~ s/\/pub\/scm//;
3305                                 }
3306                         }
3307                         $co{'title_short'} = chop_str($title, 50, 5);
3308                         last;
3309                 }
3310         }
3311         if (! defined $co{'title'} || $co{'title'} eq "") {
3312                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3313         }
3314         # remove added spaces
3315         foreach my $line (@commit_lines) {
3316                 $line =~ s/^    //;
3317         }
3318         $co{'comment'} = \@commit_lines;
3319
3320         my $age = time - $co{'committer_epoch'};
3321         $co{'age'} = $age;
3322         $co{'age_string'} = age_string($age);
3323         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3324         if ($age > 60*60*24*7*2) {
3325                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3326                 $co{'age_string_age'} = $co{'age_string'};
3327         } else {
3328                 $co{'age_string_date'} = $co{'age_string'};
3329                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3330         }
3331         return %co;
3332 }
3333
3334 sub parse_commit {
3335         my ($commit_id) = @_;
3336         my %co;
3337
3338         local $/ = "\0";
3339
3340         open my $fd, "-|", git_cmd(), "rev-list",
3341                 "--parents",
3342                 "--header",
3343                 "--max-count=1",
3344                 $commit_id,
3345                 "--",
3346                 or die_error(500, "Open git-rev-list failed");
3347         %co = parse_commit_text(<$fd>, 1);
3348         close $fd;
3349
3350         return %co;
3351 }
3352
3353 sub parse_commits {
3354         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3355         my @cos;
3356
3357         $maxcount ||= 1;
3358         $skip ||= 0;
3359
3360         local $/ = "\0";
3361
3362         open my $fd, "-|", git_cmd(), "rev-list",
3363                 "--header",
3364                 @args,
3365                 ("--max-count=" . $maxcount),
3366                 ("--skip=" . $skip),
3367                 @extra_options,
3368                 $commit_id,
3369                 "--",
3370                 ($filename ? ($filename) : ())
3371                 or die_error(500, "Open git-rev-list failed");
3372         while (my $line = <$fd>) {
3373                 my %co = parse_commit_text($line);
3374                 push @cos, \%co;
3375         }
3376         close $fd;
3377
3378         return wantarray ? @cos : \@cos;
3379 }
3380
3381 # parse line of git-diff-tree "raw" output
3382 sub parse_difftree_raw_line {
3383         my $line = shift;
3384         my %res;
3385
3386         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3387         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3388         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3389                 $res{'from_mode'} = $1;
3390                 $res{'to_mode'} = $2;
3391                 $res{'from_id'} = $3;
3392                 $res{'to_id'} = $4;
3393                 $res{'status'} = $5;
3394                 $res{'similarity'} = $6;
3395                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3396                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3397                 } else {
3398                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3399                 }
3400         }
3401         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3402         # combined diff (for merge commit)
3403         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3404                 $res{'nparents'}  = length($1);
3405                 $res{'from_mode'} = [ split(' ', $2) ];
3406                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3407                 $res{'from_id'} = [ split(' ', $3) ];
3408                 $res{'to_id'} = pop @{$res{'from_id'}};
3409                 $res{'status'} = [ split('', $4) ];
3410                 $res{'to_file'} = unquote($5);
3411         }
3412         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3413         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3414                 $res{'commit'} = $1;
3415         }
3416
3417         return wantarray ? %res : \%res;
3418 }
3419
3420 # wrapper: return parsed line of git-diff-tree "raw" output
3421 # (the argument might be raw line, or parsed info)
3422 sub parsed_difftree_line {
3423         my $line_or_ref = shift;
3424
3425         if (ref($line_or_ref) eq "HASH") {
3426                 # pre-parsed (or generated by hand)
3427                 return $line_or_ref;
3428         } else {
3429                 return parse_difftree_raw_line($line_or_ref);
3430         }
3431 }
3432
3433 # parse line of git-ls-tree output
3434 sub parse_ls_tree_line {
3435         my $line = shift;
3436         my %opts = @_;
3437         my %res;
3438
3439         if ($opts{'-l'}) {
3440                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3441                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3442
3443                 $res{'mode'} = $1;
3444                 $res{'type'} = $2;
3445                 $res{'hash'} = $3;
3446                 $res{'size'} = $4;
3447                 if ($opts{'-z'}) {
3448                         $res{'name'} = $5;
3449                 } else {
3450                         $res{'name'} = unquote($5);
3451                 }
3452         } else {
3453                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3454                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3455
3456                 $res{'mode'} = $1;
3457                 $res{'type'} = $2;
3458                 $res{'hash'} = $3;
3459                 if ($opts{'-z'}) {
3460                         $res{'name'} = $4;
3461                 } else {
3462                         $res{'name'} = unquote($4);
3463                 }
3464         }
3465
3466         return wantarray ? %res : \%res;
3467 }
3468
3469 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3470 sub parse_from_to_diffinfo {
3471         my ($diffinfo, $from, $to, @parents) = @_;
3472
3473         if ($diffinfo->{'nparents'}) {
3474                 # combined diff
3475                 $from->{'file'} = [];
3476                 $from->{'href'} = [];
3477                 fill_from_file_info($diffinfo, @parents)
3478                         unless exists $diffinfo->{'from_file'};
3479                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3480                         $from->{'file'}[$i] =
3481                                 defined $diffinfo->{'from_file'}[$i] ?
3482                                         $diffinfo->{'from_file'}[$i] :
3483                                         $diffinfo->{'to_file'};
3484                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3485                                 $from->{'href'}[$i] = href(action=>"blob",
3486                                                            hash_base=>$parents[$i],
3487                                                            hash=>$diffinfo->{'from_id'}[$i],
3488                                                            file_name=>$from->{'file'}[$i]);
3489                         } else {
3490                                 $from->{'href'}[$i] = undef;
3491                         }
3492                 }
3493         } else {
3494                 # ordinary (not combined) diff
3495                 $from->{'file'} = $diffinfo->{'from_file'};
3496                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3497                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3498                                                hash=>$diffinfo->{'from_id'},
3499                                                file_name=>$from->{'file'});
3500                 } else {
3501                         delete $from->{'href'};
3502                 }
3503         }
3504
3505         $to->{'file'} = $diffinfo->{'to_file'};
3506         if (!is_deleted($diffinfo)) { # file exists in result
3507                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3508                                      hash=>$diffinfo->{'to_id'},
3509                                      file_name=>$to->{'file'});
3510         } else {
3511                 delete $to->{'href'};
3512         }
3513 }
3514
3515 ## ......................................................................
3516 ## parse to array of hashes functions
3517
3518 sub git_get_heads_list {
3519         my ($limit, @classes) = @_;
3520         @classes = ('heads') unless @classes;
3521         my @patterns = map { "refs/$_" } @classes;
3522         my @headslist;
3523
3524         open my $fd, '-|', git_cmd(), 'for-each-ref',
3525                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3526                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3527                 @patterns
3528                 or return;
3529         while (my $line = <$fd>) {
3530                 my %ref_item;
3531
3532                 chomp $line;
3533                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3534                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3535                 my ($committer, $epoch, $tz) =
3536                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3537                 $ref_item{'fullname'}  = $name;
3538                 $name =~ s!^refs/(?:head|remote)s/!!;
3539
3540                 $ref_item{'name'}  = $name;
3541                 $ref_item{'id'}    = $hash;
3542                 $ref_item{'title'} = $title || '(no commit message)';
3543                 $ref_item{'epoch'} = $epoch;
3544                 if ($epoch) {
3545                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3546                 } else {
3547                         $ref_item{'age'} = "unknown";
3548                 }
3549
3550                 push @headslist, \%ref_item;
3551         }
3552         close $fd;
3553
3554         return wantarray ? @headslist : \@headslist;
3555 }
3556
3557 sub git_get_tags_list {
3558         my $limit = shift;
3559         my @tagslist;
3560
3561         open my $fd, '-|', git_cmd(), 'for-each-ref',
3562                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3563                 '--format=%(objectname) %(objecttype) %(refname) '.
3564                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3565                 'refs/tags'
3566                 or return;
3567         while (my $line = <$fd>) {
3568                 my %ref_item;
3569
3570                 chomp $line;
3571                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3572                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3573                 my ($creator, $epoch, $tz) =
3574                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3575                 $ref_item{'fullname'} = $name;
3576                 $name =~ s!^refs/tags/!!;
3577
3578                 $ref_item{'type'} = $type;
3579                 $ref_item{'id'} = $id;
3580                 $ref_item{'name'} = $name;
3581                 if ($type eq "tag") {
3582                         $ref_item{'subject'} = $title;
3583                         $ref_item{'reftype'} = $reftype;
3584                         $ref_item{'refid'}   = $refid;
3585                 } else {
3586                         $ref_item{'reftype'} = $type;
3587                         $ref_item{'refid'}   = $id;
3588                 }
3589
3590                 if ($type eq "tag" || $type eq "commit") {
3591                         $ref_item{'epoch'} = $epoch;
3592                         if ($epoch) {
3593                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3594                         } else {
3595                                 $ref_item{'age'} = "unknown";
3596                         }
3597                 }
3598
3599                 push @tagslist, \%ref_item;
3600         }
3601         close $fd;
3602
3603         return wantarray ? @tagslist : \@tagslist;
3604 }
3605
3606 ## ----------------------------------------------------------------------
3607 ## filesystem-related functions
3608
3609 sub get_file_owner {
3610         my $path = shift;
3611
3612         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3613         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3614         if (!defined $gcos) {
3615                 return undef;
3616         }
3617         my $owner = $gcos;
3618         $owner =~ s/[,;].*$//;
3619         return to_utf8($owner);
3620 }
3621
3622 # assume that file exists
3623 sub insert_file {
3624         my $filename = shift;
3625
3626         open my $fd, '<', $filename;
3627         print map { to_utf8($_) } <$fd>;
3628         close $fd;
3629 }
3630
3631 ## ......................................................................
3632 ## mimetype related functions
3633
3634 sub mimetype_guess_file {
3635         my $filename = shift;
3636         my $mimemap = shift;
3637         -r $mimemap or return undef;
3638
3639         my %mimemap;
3640         open(my $mh, '<', $mimemap) or return undef;
3641         while (<$mh>) {
3642                 next if m/^#/; # skip comments
3643                 my ($mimetype, @exts) = split(/\s+/);
3644                 foreach my $ext (@exts) {
3645                         $mimemap{$ext} = $mimetype;
3646                 }
3647         }
3648         close($mh);
3649
3650         $filename =~ /\.([^.]*)$/;
3651         return $mimemap{$1};
3652 }
3653
3654 sub mimetype_guess {
3655         my $filename = shift;
3656         my $mime;
3657         $filename =~ /\./ or return undef;
3658
3659         if ($mimetypes_file) {
3660                 my $file = $mimetypes_file;
3661                 if ($file !~ m!^/!) { # if it is relative path
3662                         # it is relative to project
3663                         $file = "$projectroot/$project/$file";
3664                 }
3665                 $mime = mimetype_guess_file($filename, $file);
3666         }
3667         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3668         return $mime;
3669 }
3670
3671 sub blob_mimetype {
3672         my $fd = shift;
3673         my $filename = shift;
3674
3675         if ($filename) {
3676                 my $mime = mimetype_guess($filename);
3677                 $mime and return $mime;
3678         }
3679
3680         # just in case
3681         return $default_blob_plain_mimetype unless $fd;
3682
3683         if (-T $fd) {
3684                 return 'text/plain';
3685         } elsif (! $filename) {
3686                 return 'application/octet-stream';
3687         } elsif ($filename =~ m/\.png$/i) {
3688                 return 'image/png';
3689         } elsif ($filename =~ m/\.gif$/i) {
3690                 return 'image/gif';
3691         } elsif ($filename =~ m/\.jpe?g$/i) {
3692                 return 'image/jpeg';
3693         } else {
3694                 return 'application/octet-stream';
3695         }
3696 }
3697
3698 sub blob_contenttype {
3699         my ($fd, $file_name, $type) = @_;
3700
3701         $type ||= blob_mimetype($fd, $file_name);
3702         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3703                 $type .= "; charset=$default_text_plain_charset";
3704         }
3705
3706         return $type;
3707 }
3708
3709 # guess file syntax for syntax highlighting; return undef if no highlighting
3710 # the name of syntax can (in the future) depend on syntax highlighter used
3711 sub guess_file_syntax {
3712         my ($highlight, $mimetype, $file_name) = @_;
3713         return undef unless ($highlight && defined $file_name);
3714         my $basename = basename($file_name, '.in');
3715         return $highlight_basename{$basename}
3716                 if exists $highlight_basename{$basename};
3717
3718         $basename =~ /\.([^.]*)$/;
3719         my $ext = $1 or return undef;
3720         return $highlight_ext{$ext}
3721                 if exists $highlight_ext{$ext};
3722
3723         return undef;
3724 }
3725
3726 # run highlighter and return FD of its output,
3727 # or return original FD if no highlighting
3728 sub run_highlighter {
3729         my ($fd, $highlight, $syntax) = @_;
3730         return $fd unless ($highlight && defined $syntax);
3731
3732         close $fd;
3733         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3734                   quote_command($highlight_bin).
3735                   " --replace-tabs=8 --fragment --syntax $syntax |"
3736                 or die_error(500, "Couldn't open file or run syntax highlighter");
3737         return $fd;
3738 }
3739
3740 ## ======================================================================
3741 ## functions printing HTML: header, footer, error page
3742
3743 sub get_page_title {
3744         my $title = to_utf8($site_name);
3745
3746         unless (defined $project) {
3747                 if (defined $project_filter) {
3748                         $title .= " - " . to_utf8($project_filter);
3749                 }
3750                 return $title;
3751         }
3752         $title .= " - " . to_utf8($project);
3753
3754         return $title unless (defined $action);
3755         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3756
3757         return $title unless (defined $file_name);
3758         $title .= " - " . esc_path($file_name);
3759         if ($action eq "tree" && $file_name !~ m|/$|) {
3760                 $title .= "/";
3761         }
3762
3763         return $title;
3764 }
3765
3766 sub get_content_type_html {
3767         # require explicit support from the UA if we are to send the page as
3768         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3769         # we have to do this because MSIE sometimes globs '*/*', pretending to
3770         # support xhtml+xml but choking when it gets what it asked for.
3771         if (defined $cgi->http('HTTP_ACCEPT') &&
3772             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3773             $cgi->Accept('application/xhtml+xml') != 0) {
3774                 return 'application/xhtml+xml';
3775         } else {
3776                 return 'text/html';
3777         }
3778 }
3779
3780 sub print_feed_meta {
3781         if (defined $project) {
3782                 my %href_params = get_feed_info();
3783                 if (!exists $href_params{'-title'}) {
3784                         $href_params{'-title'} = 'log';
3785                 }
3786
3787                 foreach my $format (qw(RSS Atom)) {
3788                         my $type = lc($format);
3789                         my %link_attr = (
3790                                 '-rel' => 'alternate',
3791                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3792                                 '-type' => "application/$type+xml"
3793                         );
3794
3795                         $href_params{'action'} = $type;
3796                         $link_attr{'-href'} = href(%href_params);
3797                         print "<link ".
3798                               "rel=\"$link_attr{'-rel'}\" ".
3799                               "title=\"$link_attr{'-title'}\" ".
3800                               "href=\"$link_attr{'-href'}\" ".
3801                               "type=\"$link_attr{'-type'}\" ".
3802                               "/>\n";
3803
3804                         $href_params{'extra_options'} = '--no-merges';
3805                         $link_attr{'-href'} = href(%href_params);
3806                         $link_attr{'-title'} .= ' (no merges)';
3807                         print "<link ".
3808                               "rel=\"$link_attr{'-rel'}\" ".
3809                               "title=\"$link_attr{'-title'}\" ".
3810                               "href=\"$link_attr{'-href'}\" ".
3811                               "type=\"$link_attr{'-type'}\" ".
3812                               "/>\n";
3813                 }
3814
3815         } else {
3816                 printf('<link rel="alternate" title="%s projects list" '.
3817                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3818                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3819                 printf('<link rel="alternate" title="%s projects feeds" '.
3820                        'href="%s" type="text/x-opml" />'."\n",
3821                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3822         }
3823 }
3824
3825 sub print_header_links {
3826         my $status = shift;
3827
3828         # print out each stylesheet that exist, providing backwards capability
3829         # for those people who defined $stylesheet in a config file
3830         if (defined $stylesheet) {
3831                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3832         } else {
3833                 foreach my $stylesheet (@stylesheets) {
3834                         next unless $stylesheet;
3835                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3836                 }
3837         }
3838         print_feed_meta()
3839                 if ($status eq '200 OK');
3840         if (defined $favicon) {
3841                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3842         }
3843 }
3844
3845 sub print_nav_breadcrumbs {
3846         my %opts = @_;
3847
3848         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3849         if (defined $project) {
3850                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3851                 if (defined $action) {
3852                         my $action_print = $action ;
3853                         if (defined $opts{-action_extra}) {
3854                                 $action_print = $cgi->a({-href => href(action=>$action)},
3855                                         $action);
3856                         }
3857                         print " / $action_print";
3858                 }
3859                 if (defined $opts{-action_extra}) {
3860                         print " / $opts{-action_extra}";
3861                 }
3862                 print "\n";
3863         }
3864 }
3865
3866 sub print_search_form {
3867         if (!defined $searchtext) {
3868                 $searchtext = "";
3869         }
3870         my $search_hash;
3871         if (defined $hash_base) {
3872                 $search_hash = $hash_base;
3873         } elsif (defined $hash) {
3874                 $search_hash = $hash;
3875         } else {
3876                 $search_hash = "HEAD";
3877         }
3878         my $action = $my_uri;
3879         my $use_pathinfo = gitweb_check_feature('pathinfo');
3880         if ($use_pathinfo) {
3881                 $action .= "/".esc_url($project);
3882         }
3883         print $cgi->startform(-method => "get", -action => $action) .
3884               "<div class=\"search\">\n" .
3885               (!$use_pathinfo &&
3886               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3887               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3888               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3889               $cgi->popup_menu(-name => 'st', -default => 'commit',
3890                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3891               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3892               " search:\n",
3893               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3894               "<span title=\"Extended regular expression\">" .
3895               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3896                              -checked => $search_use_regexp) .
3897               "</span>" .
3898               "</div>" .
3899               $cgi->end_form() . "\n";
3900 }
3901
3902 sub git_header_html {
3903         my $status = shift || "200 OK";
3904         my $expires = shift;
3905         my %opts = @_;
3906
3907         my $title = get_page_title();
3908         my $content_type = get_content_type_html();
3909         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3910                            -status=> $status, -expires => $expires)
3911                 unless ($opts{'-no_http_header'});
3912         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3913         print <<EOF;
3914 <?xml version="1.0" encoding="utf-8"?>
3915 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3916 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3917 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3918 <!-- git core binaries version $git_version -->
3919 <head>
3920 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3921 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3922 <meta name="robots" content="index, nofollow"/>
3923 <title>$title</title>
3924 EOF
3925         # the stylesheet, favicon etc urls won't work correctly with path_info
3926         # unless we set the appropriate base URL
3927         if ($ENV{'PATH_INFO'}) {
3928                 print "<base href=\"".esc_url($base_url)."\" />\n";
3929         }
3930         print_header_links($status);
3931
3932         if (defined $site_html_head_string) {
3933                 print to_utf8($site_html_head_string);
3934         }
3935
3936         print "</head>\n" .
3937               "<body>\n";
3938
3939         if (defined $site_header && -f $site_header) {
3940                 insert_file($site_header);
3941         }
3942
3943         print "<div class=\"page_header\">\n";
3944         if (defined $logo) {
3945                 print $cgi->a({-href => esc_url($logo_url),
3946                                -title => $logo_label},
3947                               $cgi->img({-src => esc_url($logo),
3948                                          -width => 72, -height => 27,
3949                                          -alt => "git",
3950                                          -class => "logo"}));
3951         }
3952         print_nav_breadcrumbs(%opts);
3953         print "</div>\n";
3954
3955         my $have_search = gitweb_check_feature('search');
3956         if (defined $project && $have_search) {
3957                 print_search_form();
3958         }
3959 }
3960
3961 sub git_footer_html {
3962         my $feed_class = 'rss_logo';
3963
3964         print "<div class=\"page_footer\">\n";
3965         if (defined $project) {
3966                 my $descr = git_get_project_description($project);
3967                 if (defined $descr) {
3968                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3969                 }
3970
3971                 my %href_params = get_feed_info();
3972                 if (!%href_params) {
3973                         $feed_class .= ' generic';
3974                 }
3975                 $href_params{'-title'} ||= 'log';
3976
3977                 foreach my $format (qw(RSS Atom)) {
3978                         $href_params{'action'} = lc($format);
3979                         print $cgi->a({-href => href(%href_params),
3980                                       -title => "$href_params{'-title'} $format feed",
3981                                       -class => $feed_class}, $format)."\n";
3982                 }
3983
3984         } else {
3985                 print $cgi->a({-href => href(project=>undef, action=>"opml",
3986                                              project_filter => $project_filter),
3987                               -class => $feed_class}, "OPML") . " ";
3988                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
3989                                              project_filter => $project_filter),
3990                               -class => $feed_class}, "TXT") . "\n";
3991         }
3992         print "</div>\n"; # class="page_footer"
3993
3994         if (defined $t0 && gitweb_check_feature('timed')) {
3995                 print "<div id=\"generating_info\">\n";
3996                 print 'This page took '.
3997                       '<span id="generating_time" class="time_span">'.
3998                       tv_interval($t0, [ gettimeofday() ]).
3999                       ' seconds </span>'.
4000                       ' and '.
4001                       '<span id="generating_cmd">'.
4002                       $number_of_git_cmds.
4003                       '</span> git commands '.
4004                       " to generate.\n";
4005                 print "</div>\n"; # class="page_footer"
4006         }
4007
4008         if (defined $site_footer && -f $site_footer) {
4009                 insert_file($site_footer);
4010         }
4011
4012         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4013         if (defined $action &&
4014             $action eq 'blame_incremental') {
4015                 print qq!<script type="text/javascript">\n!.
4016                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4017                       qq!           "!. href() .qq!");\n!.
4018                       qq!</script>\n!;
4019         } else {
4020                 my ($jstimezone, $tz_cookie, $datetime_class) =
4021                         gitweb_get_feature('javascript-timezone');
4022
4023                 print qq!<script type="text/javascript">\n!.
4024                       qq!window.onload = function () {\n!;
4025                 if (gitweb_check_feature('javascript-actions')) {
4026                         print qq!       fixLinks();\n!;
4027                 }
4028                 if ($jstimezone && $tz_cookie && $datetime_class) {
4029                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4030                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4031                 }
4032                 print qq!};\n!.
4033                       qq!</script>\n!;
4034         }
4035
4036         print "</body>\n" .
4037               "</html>";
4038 }
4039
4040 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4041 # Example: die_error(404, 'Hash not found')
4042 # By convention, use the following status codes (as defined in RFC 2616):
4043 # 400: Invalid or missing CGI parameters, or
4044 #      requested object exists but has wrong type.
4045 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4046 #      this server or project.
4047 # 404: Requested object/revision/project doesn't exist.
4048 # 500: The server isn't configured properly, or
4049 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4050 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4051 # 503: The server is currently unavailable (because it is overloaded,
4052 #      or down for maintenance).  Generally, this is a temporary state.
4053 sub die_error {
4054         my $status = shift || 500;
4055         my $error = esc_html(shift) || "Internal Server Error";
4056         my $extra = shift;
4057         my %opts = @_;
4058
4059         my %http_responses = (
4060                 400 => '400 Bad Request',
4061                 403 => '403 Forbidden',
4062                 404 => '404 Not Found',
4063                 500 => '500 Internal Server Error',
4064                 503 => '503 Service Unavailable',
4065         );
4066         git_header_html($http_responses{$status}, undef, %opts);
4067         print <<EOF;
4068 <div class="page_body">
4069 <br /><br />
4070 $status - $error
4071 <br />
4072 EOF
4073         if (defined $extra) {
4074                 print "<hr />\n" .
4075                       "$extra\n";
4076         }
4077         print "</div>\n";
4078
4079         git_footer_html();
4080         goto DONE_GITWEB
4081                 unless ($opts{'-error_handler'});
4082 }
4083
4084 ## ----------------------------------------------------------------------
4085 ## functions printing or outputting HTML: navigation
4086
4087 sub git_print_page_nav {
4088         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4089         $extra = '' if !defined $extra; # pager or formats
4090
4091         my @navs = qw(summary shortlog log commit commitdiff tree);
4092         if ($suppress) {
4093                 @navs = grep { $_ ne $suppress } @navs;
4094         }
4095
4096         my %arg = map { $_ => {action=>$_} } @navs;
4097         if (defined $head) {
4098                 for (qw(commit commitdiff)) {
4099                         $arg{$_}{'hash'} = $head;
4100                 }
4101                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4102                         for (qw(shortlog log)) {
4103                                 $arg{$_}{'hash'} = $head;
4104                         }
4105                 }
4106         }
4107
4108         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4109         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4110
4111         my @actions = gitweb_get_feature('actions');
4112         my %repl = (
4113                 '%' => '%',
4114                 'n' => $project,         # project name
4115                 'f' => $git_dir,         # project path within filesystem
4116                 'h' => $treehead || '',  # current hash ('h' parameter)
4117                 'b' => $treebase || '',  # hash base ('hb' parameter)
4118         );
4119         while (@actions) {
4120                 my ($label, $link, $pos) = splice(@actions,0,3);
4121                 # insert
4122                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4123                 # munch munch
4124                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4125                 $arg{$label}{'_href'} = $link;
4126         }
4127
4128         print "<div class=\"page_nav\">\n" .
4129                 (join " | ",
4130                  map { $_ eq $current ?
4131                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4132                  } @navs);
4133         print "<br/>\n$extra<br/>\n" .
4134               "</div>\n";
4135 }
4136
4137 # returns a submenu for the nagivation of the refs views (tags, heads,
4138 # remotes) with the current view disabled and the remotes view only
4139 # available if the feature is enabled
4140 sub format_ref_views {
4141         my ($current) = @_;
4142         my @ref_views = qw{tags heads};
4143         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4144         return join " | ", map {
4145                 $_ eq $current ? $_ :
4146                 $cgi->a({-href => href(action=>$_)}, $_)
4147         } @ref_views
4148 }
4149
4150 sub format_paging_nav {
4151         my ($action, $page, $has_next_link) = @_;
4152         my $paging_nav;
4153
4154
4155         if ($page > 0) {
4156                 $paging_nav .=
4157                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4158                         " &sdot; " .
4159                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4160                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4161         } else {
4162                 $paging_nav .= "first &sdot; prev";
4163         }
4164
4165         if ($has_next_link) {
4166                 $paging_nav .= " &sdot; " .
4167                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4168                                  -accesskey => "n", -title => "Alt-n"}, "next");
4169         } else {
4170                 $paging_nav .= " &sdot; next";
4171         }
4172
4173         return $paging_nav;
4174 }
4175
4176 ## ......................................................................
4177 ## functions printing or outputting HTML: div
4178
4179 sub git_print_header_div {
4180         my ($action, $title, $hash, $hash_base) = @_;
4181         my %args = ();
4182
4183         $args{'action'} = $action;
4184         $args{'hash'} = $hash if $hash;
4185         $args{'hash_base'} = $hash_base if $hash_base;
4186
4187         print "<div class=\"header\">\n" .
4188               $cgi->a({-href => href(%args), -class => "title"},
4189               $title ? $title : $action) .
4190               "\n</div>\n";
4191 }
4192
4193 sub format_repo_url {
4194         my ($name, $url) = @_;
4195         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4196 }
4197
4198 # Group output by placing it in a DIV element and adding a header.
4199 # Options for start_div() can be provided by passing a hash reference as the
4200 # first parameter to the function.
4201 # Options to git_print_header_div() can be provided by passing an array
4202 # reference. This must follow the options to start_div if they are present.
4203 # The content can be a scalar, which is output as-is, a scalar reference, which
4204 # is output after html escaping, an IO handle passed either as *handle or
4205 # *handle{IO}, or a function reference. In the latter case all following
4206 # parameters will be taken as argument to the content function call.
4207 sub git_print_section {
4208         my ($div_args, $header_args, $content);
4209         my $arg = shift;
4210         if (ref($arg) eq 'HASH') {
4211                 $div_args = $arg;
4212                 $arg = shift;
4213         }
4214         if (ref($arg) eq 'ARRAY') {
4215                 $header_args = $arg;
4216                 $arg = shift;
4217         }
4218         $content = $arg;
4219
4220         print $cgi->start_div($div_args);
4221         git_print_header_div(@$header_args);
4222
4223         if (ref($content) eq 'CODE') {
4224                 $content->(@_);
4225         } elsif (ref($content) eq 'SCALAR') {
4226                 print esc_html($$content);
4227         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4228                 print <$content>;
4229         } elsif (!ref($content) && defined($content)) {
4230                 print $content;
4231         }
4232
4233         print $cgi->end_div;
4234 }
4235
4236 sub format_timestamp_html {
4237         my $date = shift;
4238         my $strtime = $date->{'rfc2822'};
4239
4240         my (undef, undef, $datetime_class) =
4241                 gitweb_get_feature('javascript-timezone');
4242         if ($datetime_class) {
4243                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4244         }
4245
4246         my $localtime_format = '(%02d:%02d %s)';
4247         if ($date->{'hour_local'} < 6) {
4248                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4249         }
4250         $strtime .= ' ' .
4251                     sprintf($localtime_format,
4252                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4253
4254         return $strtime;
4255 }
4256
4257 # Outputs the author name and date in long form
4258 sub git_print_authorship {
4259         my $co = shift;
4260         my %opts = @_;
4261         my $tag = $opts{-tag} || 'div';
4262         my $author = $co->{'author_name'};
4263
4264         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4265         print "<$tag class=\"author_date\">" .
4266               format_search_author($author, "author", esc_html($author)) .
4267               " [".format_timestamp_html(\%ad)."]".
4268               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4269               "</$tag>\n";
4270 }
4271
4272 # Outputs table rows containing the full author or committer information,
4273 # in the format expected for 'commit' view (& similar).
4274 # Parameters are a commit hash reference, followed by the list of people
4275 # to output information for. If the list is empty it defaults to both
4276 # author and committer.
4277 sub git_print_authorship_rows {
4278         my $co = shift;
4279         # too bad we can't use @people = @_ || ('author', 'committer')
4280         my @people = @_;
4281         @people = ('author', 'committer') unless @people;
4282         foreach my $who (@people) {
4283                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4284                 print "<tr><td>$who</td><td>" .
4285                       format_search_author($co->{"${who}_name"}, $who,
4286                                            esc_html($co->{"${who}_name"})) . " " .
4287                       format_search_author($co->{"${who}_email"}, $who,
4288                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4289                       "</td><td rowspan=\"2\">" .
4290                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4291                       "</td></tr>\n" .
4292                       "<tr>" .
4293                       "<td></td><td>" .
4294                       format_timestamp_html(\%wd) .
4295                       "</td>" .
4296                       "</tr>\n";
4297         }
4298 }
4299
4300 sub git_print_page_path {
4301         my $name = shift;
4302         my $type = shift;
4303         my $hb = shift;
4304
4305
4306         print "<div class=\"page_path\">";
4307         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4308                       -title => 'tree root'}, to_utf8("[$project]"));
4309         print " / ";
4310         if (defined $name) {
4311                 my @dirname = split '/', $name;
4312                 my $basename = pop @dirname;
4313                 my $fullname = '';
4314
4315                 foreach my $dir (@dirname) {
4316                         $fullname .= ($fullname ? '/' : '') . $dir;
4317                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4318                                                      hash_base=>$hb),
4319                                       -title => $fullname}, esc_path($dir));
4320                         print " / ";
4321                 }
4322                 if (defined $type && $type eq 'blob') {
4323                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4324                                                      hash_base=>$hb),
4325                                       -title => $name}, esc_path($basename));
4326                 } elsif (defined $type && $type eq 'tree') {
4327                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4328                                                      hash_base=>$hb),
4329                                       -title => $name}, esc_path($basename));
4330                         print " / ";
4331                 } else {
4332                         print esc_path($basename);
4333                 }
4334         }
4335         print "<br/></div>\n";
4336 }
4337
4338 sub git_print_log {
4339         my $log = shift;
4340         my %opts = @_;
4341
4342         if ($opts{'-remove_title'}) {
4343                 # remove title, i.e. first line of log
4344                 shift @$log;
4345         }
4346         # remove leading empty lines
4347         while (defined $log->[0] && $log->[0] eq "") {
4348                 shift @$log;
4349         }
4350
4351         # print log
4352         my $signoff = 0;
4353         my $empty = 0;
4354         foreach my $line (@$log) {
4355                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4356                         $signoff = 1;
4357                         $empty = 0;
4358                         if (! $opts{'-remove_signoff'}) {
4359                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4360                                 next;
4361                         } else {
4362                                 # remove signoff lines
4363                                 next;
4364                         }
4365                 } else {
4366                         $signoff = 0;
4367                 }
4368
4369                 # print only one empty line
4370                 # do not print empty line after signoff
4371                 if ($line eq "") {
4372                         next if ($empty || $signoff);
4373                         $empty = 1;
4374                 } else {
4375                         $empty = 0;
4376                 }
4377
4378                 print format_log_line_html($line) . "<br/>\n";
4379         }
4380
4381         if ($opts{'-final_empty_line'}) {
4382                 # end with single empty line
4383                 print "<br/>\n" unless $empty;
4384         }
4385 }
4386
4387 # return link target (what link points to)
4388 sub git_get_link_target {
4389         my $hash = shift;
4390         my $link_target;
4391
4392         # read link
4393         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4394                 or return;
4395         {
4396                 local $/ = undef;
4397                 $link_target = <$fd>;
4398         }
4399         close $fd
4400                 or return;
4401
4402         return $link_target;
4403 }
4404
4405 # given link target, and the directory (basedir) the link is in,
4406 # return target of link relative to top directory (top tree);
4407 # return undef if it is not possible (including absolute links).
4408 sub normalize_link_target {
4409         my ($link_target, $basedir) = @_;
4410
4411         # absolute symlinks (beginning with '/') cannot be normalized
4412         return if (substr($link_target, 0, 1) eq '/');
4413
4414         # normalize link target to path from top (root) tree (dir)
4415         my $path;
4416         if ($basedir) {
4417                 $path = $basedir . '/' . $link_target;
4418         } else {
4419                 # we are in top (root) tree (dir)
4420                 $path = $link_target;
4421         }
4422
4423         # remove //, /./, and /../
4424         my @path_parts;
4425         foreach my $part (split('/', $path)) {
4426                 # discard '.' and ''
4427                 next if (!$part || $part eq '.');
4428                 # handle '..'
4429                 if ($part eq '..') {
4430                         if (@path_parts) {
4431                                 pop @path_parts;
4432                         } else {
4433                                 # link leads outside repository (outside top dir)
4434                                 return;
4435                         }
4436                 } else {
4437                         push @path_parts, $part;
4438                 }
4439         }
4440         $path = join('/', @path_parts);
4441
4442         return $path;
4443 }
4444
4445 # print tree entry (row of git_tree), but without encompassing <tr> element
4446 sub git_print_tree_entry {
4447         my ($t, $basedir, $hash_base, $have_blame) = @_;
4448
4449         my %base_key = ();
4450         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4451
4452         # The format of a table row is: mode list link.  Where mode is
4453         # the mode of the entry, list is the name of the entry, an href,
4454         # and link is the action links of the entry.
4455
4456         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4457         if (exists $t->{'size'}) {
4458                 print "<td class=\"size\">$t->{'size'}</td>\n";
4459         }
4460         if ($t->{'type'} eq "blob") {
4461                 print "<td class=\"list\">" .
4462                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4463                                                file_name=>"$basedir$t->{'name'}", %base_key),
4464                                 -class => "list"}, esc_path($t->{'name'}));
4465                 if (S_ISLNK(oct $t->{'mode'})) {
4466                         my $link_target = git_get_link_target($t->{'hash'});
4467                         if ($link_target) {
4468                                 my $norm_target = normalize_link_target($link_target, $basedir);
4469                                 if (defined $norm_target) {
4470                                         print " -> " .
4471                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4472                                                                      file_name=>$norm_target),
4473                                                        -title => $norm_target}, esc_path($link_target));
4474                                 } else {
4475                                         print " -> " . esc_path($link_target);
4476                                 }
4477                         }
4478                 }
4479                 print "</td>\n";
4480                 print "<td class=\"link\">";
4481                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4482                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4483                               "blob");
4484                 if ($have_blame) {
4485                         print " | " .
4486                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4487                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4488                                       "blame");
4489                 }
4490                 if (defined $hash_base) {
4491                         print " | " .
4492                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4493                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4494                                       "history");
4495                 }
4496                 print " | " .
4497                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4498                                                file_name=>"$basedir$t->{'name'}")},
4499                                 "raw");
4500                 print "</td>\n";
4501
4502         } elsif ($t->{'type'} eq "tree") {
4503                 print "<td class=\"list\">";
4504                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4505                                              file_name=>"$basedir$t->{'name'}",
4506                                              %base_key)},
4507                               esc_path($t->{'name'}));
4508                 print "</td>\n";
4509                 print "<td class=\"link\">";
4510                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4511                                              file_name=>"$basedir$t->{'name'}",
4512                                              %base_key)},
4513                               "tree");
4514                 if (defined $hash_base) {
4515                         print " | " .
4516                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4517                                                      file_name=>"$basedir$t->{'name'}")},
4518                                       "history");
4519                 }
4520                 print "</td>\n";
4521         } else {
4522                 # unknown object: we can only present history for it
4523                 # (this includes 'commit' object, i.e. submodule support)
4524                 print "<td class=\"list\">" .
4525                       esc_path($t->{'name'}) .
4526                       "</td>\n";
4527                 print "<td class=\"link\">";
4528                 if (defined $hash_base) {
4529                         print $cgi->a({-href => href(action=>"history",
4530                                                      hash_base=>$hash_base,
4531                                                      file_name=>"$basedir$t->{'name'}")},
4532                                       "history");
4533                 }
4534                 print "</td>\n";
4535         }
4536 }
4537
4538 ## ......................................................................
4539 ## functions printing large fragments of HTML
4540
4541 # get pre-image filenames for merge (combined) diff
4542 sub fill_from_file_info {
4543         my ($diff, @parents) = @_;
4544
4545         $diff->{'from_file'} = [ ];
4546         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4547         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4548                 if ($diff->{'status'}[$i] eq 'R' ||
4549                     $diff->{'status'}[$i] eq 'C') {
4550                         $diff->{'from_file'}[$i] =
4551                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4552                 }
4553         }
4554
4555         return $diff;
4556 }
4557
4558 # is current raw difftree line of file deletion
4559 sub is_deleted {
4560         my $diffinfo = shift;
4561
4562         return $diffinfo->{'to_id'} eq ('0' x 40);
4563 }
4564
4565 # does patch correspond to [previous] difftree raw line
4566 # $diffinfo  - hashref of parsed raw diff format
4567 # $patchinfo - hashref of parsed patch diff format
4568 #              (the same keys as in $diffinfo)
4569 sub is_patch_split {
4570         my ($diffinfo, $patchinfo) = @_;
4571
4572         return defined $diffinfo && defined $patchinfo
4573                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4574 }
4575
4576
4577 sub git_difftree_body {
4578         my ($difftree, $hash, @parents) = @_;
4579         my ($parent) = $parents[0];
4580         my $have_blame = gitweb_check_feature('blame');
4581         print "<div class=\"list_head\">\n";
4582         if ($#{$difftree} > 10) {
4583                 print(($#{$difftree} + 1) . " files changed:\n");
4584         }
4585         print "</div>\n";
4586
4587         print "<table class=\"" .
4588               (@parents > 1 ? "combined " : "") .
4589               "diff_tree\">\n";
4590
4591         # header only for combined diff in 'commitdiff' view
4592         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4593         if ($has_header) {
4594                 # table header
4595                 print "<thead><tr>\n" .
4596                        "<th></th><th></th>\n"; # filename, patchN link
4597                 for (my $i = 0; $i < @parents; $i++) {
4598                         my $par = $parents[$i];
4599                         print "<th>" .
4600                               $cgi->a({-href => href(action=>"commitdiff",
4601                                                      hash=>$hash, hash_parent=>$par),
4602                                        -title => 'commitdiff to parent number ' .
4603                                                   ($i+1) . ': ' . substr($par,0,7)},
4604                                       $i+1) .
4605                               "&nbsp;</th>\n";
4606                 }
4607                 print "</tr></thead>\n<tbody>\n";
4608         }
4609
4610         my $alternate = 1;
4611         my $patchno = 0;
4612         foreach my $line (@{$difftree}) {
4613                 my $diff = parsed_difftree_line($line);
4614
4615                 if ($alternate) {
4616                         print "<tr class=\"dark\">\n";
4617                 } else {
4618                         print "<tr class=\"light\">\n";
4619                 }
4620                 $alternate ^= 1;
4621
4622                 if (exists $diff->{'nparents'}) { # combined diff
4623
4624                         fill_from_file_info($diff, @parents)
4625                                 unless exists $diff->{'from_file'};
4626
4627                         if (!is_deleted($diff)) {
4628                                 # file exists in the result (child) commit
4629                                 print "<td>" .
4630                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4631                                                              file_name=>$diff->{'to_file'},
4632                                                              hash_base=>$hash),
4633                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4634                                       "</td>\n";
4635                         } else {
4636                                 print "<td>" .
4637                                       esc_path($diff->{'to_file'}) .
4638                                       "</td>\n";
4639                         }
4640
4641                         if ($action eq 'commitdiff') {
4642                                 # link to patch
4643                                 $patchno++;
4644                                 print "<td class=\"link\">" .
4645                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4646                                               "patch") .
4647                                       " | " .
4648                                       "</td>\n";
4649                         }
4650
4651                         my $has_history = 0;
4652                         my $not_deleted = 0;
4653                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4654                                 my $hash_parent = $parents[$i];
4655                                 my $from_hash = $diff->{'from_id'}[$i];
4656                                 my $from_path = $diff->{'from_file'}[$i];
4657                                 my $status = $diff->{'status'}[$i];
4658
4659                                 $has_history ||= ($status ne 'A');
4660                                 $not_deleted ||= ($status ne 'D');
4661
4662                                 if ($status eq 'A') {
4663                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4664                                 } elsif ($status eq 'D') {
4665                                         print "<td class=\"link\">" .
4666                                               $cgi->a({-href => href(action=>"blob",
4667                                                                      hash_base=>$hash,
4668                                                                      hash=>$from_hash,
4669                                                                      file_name=>$from_path)},
4670                                                       "blob" . ($i+1)) .
4671                                               " | </td>\n";
4672                                 } else {
4673                                         if ($diff->{'to_id'} eq $from_hash) {
4674                                                 print "<td class=\"link nochange\">";
4675                                         } else {
4676                                                 print "<td class=\"link\">";
4677                                         }
4678                                         print $cgi->a({-href => href(action=>"blobdiff",
4679                                                                      hash=>$diff->{'to_id'},
4680                                                                      hash_parent=>$from_hash,
4681                                                                      hash_base=>$hash,
4682                                                                      hash_parent_base=>$hash_parent,
4683                                                                      file_name=>$diff->{'to_file'},
4684                                                                      file_parent=>$from_path)},
4685                                                       "diff" . ($i+1)) .
4686                                               " | </td>\n";
4687                                 }
4688                         }
4689
4690                         print "<td class=\"link\">";
4691                         if ($not_deleted) {
4692                                 print $cgi->a({-href => href(action=>"blob",
4693                                                              hash=>$diff->{'to_id'},
4694                                                              file_name=>$diff->{'to_file'},
4695                                                              hash_base=>$hash)},
4696                                               "blob");
4697                                 print " | " if ($has_history);
4698                         }
4699                         if ($has_history) {
4700                                 print $cgi->a({-href => href(action=>"history",
4701                                                              file_name=>$diff->{'to_file'},
4702                                                              hash_base=>$hash)},
4703                                               "history");
4704                         }
4705                         print "</td>\n";
4706
4707                         print "</tr>\n";
4708                         next; # instead of 'else' clause, to avoid extra indent
4709                 }
4710                 # else ordinary diff
4711
4712                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4713                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4714                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4715                         $to_mode_oct = oct $diff->{'to_mode'};
4716                         if (S_ISREG($to_mode_oct)) { # only for regular file
4717                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4718                         }
4719                         $to_file_type = file_type($diff->{'to_mode'});
4720                 }
4721                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4722                         $from_mode_oct = oct $diff->{'from_mode'};
4723                         if (S_ISREG($from_mode_oct)) { # only for regular file
4724                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4725                         }
4726                         $from_file_type = file_type($diff->{'from_mode'});
4727                 }
4728
4729                 if ($diff->{'status'} eq "A") { # created
4730                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4731                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4732                         $mode_chng   .= "]</span>";
4733                         print "<td>";
4734                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4735                                                      hash_base=>$hash, file_name=>$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->{'to_id'},
4748                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4749                                       "blob");
4750                         print "</td>\n";
4751
4752                 } elsif ($diff->{'status'} eq "D") { # deleted
4753                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4754                         print "<td>";
4755                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4756                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4757                                        -class => "list"}, esc_path($diff->{'file'}));
4758                         print "</td>\n";
4759                         print "<td>$mode_chng</td>\n";
4760                         print "<td class=\"link\">";
4761                         if ($action eq 'commitdiff') {
4762                                 # link to patch
4763                                 $patchno++;
4764                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4765                                               "patch") .
4766                                       " | ";
4767                         }
4768                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4769                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4770                                       "blob") . " | ";
4771                         if ($have_blame) {
4772                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4773                                                              file_name=>$diff->{'file'})},
4774                                               "blame") . " | ";
4775                         }
4776                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4777                                                      file_name=>$diff->{'file'})},
4778                                       "history");
4779                         print "</td>\n";
4780
4781                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4782                         my $mode_chnge = "";
4783                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4784                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4785                                 if ($from_file_type ne $to_file_type) {
4786                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4787                                 }
4788                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4789                                         if ($from_mode_str && $to_mode_str) {
4790                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4791                                         } elsif ($to_mode_str) {
4792                                                 $mode_chnge .= " mode: $to_mode_str";
4793                                         }
4794                                 }
4795                                 $mode_chnge .= "]</span>\n";
4796                         }
4797                         print "<td>";
4798                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4799                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4800                                       -class => "list"}, esc_path($diff->{'file'}));
4801                         print "</td>\n";
4802                         print "<td>$mode_chnge</td>\n";
4803                         print "<td class=\"link\">";
4804                         if ($action eq 'commitdiff') {
4805                                 # link to patch
4806                                 $patchno++;
4807                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4808                                               "patch") .
4809                                       " | ";
4810                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4811                                 # "commit" view and modified file (not onlu mode changed)
4812                                 print $cgi->a({-href => href(action=>"blobdiff",
4813                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4814                                                              hash_base=>$hash, hash_parent_base=>$parent,
4815                                                              file_name=>$diff->{'file'})},
4816                                               "diff") .
4817                                       " | ";
4818                         }
4819                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4820                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4821                                        "blob") . " | ";
4822                         if ($have_blame) {
4823                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4824                                                              file_name=>$diff->{'file'})},
4825                                               "blame") . " | ";
4826                         }
4827                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4828                                                      file_name=>$diff->{'file'})},
4829                                       "history");
4830                         print "</td>\n";
4831
4832                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4833                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4834                         my $nstatus = $status_name{$diff->{'status'}};
4835                         my $mode_chng = "";
4836                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4837                                 # mode also for directories, so we cannot use $to_mode_str
4838                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4839                         }
4840                         print "<td>" .
4841                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4842                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4843                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4844                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4845                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4846                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4847                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4848                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4849                               "<td class=\"link\">";
4850                         if ($action eq 'commitdiff') {
4851                                 # link to patch
4852                                 $patchno++;
4853                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4854                                               "patch") .
4855                                       " | ";
4856                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4857                                 # "commit" view and modified file (not only pure rename or copy)
4858                                 print $cgi->a({-href => href(action=>"blobdiff",
4859                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4860                                                              hash_base=>$hash, hash_parent_base=>$parent,
4861                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4862                                               "diff") .
4863                                       " | ";
4864                         }
4865                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4866                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4867                                       "blob") . " | ";
4868                         if ($have_blame) {
4869                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4870                                                              file_name=>$diff->{'to_file'})},
4871                                               "blame") . " | ";
4872                         }
4873                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4874                                                     file_name=>$diff->{'to_file'})},
4875                                       "history");
4876                         print "</td>\n";
4877
4878                 } # we should not encounter Unmerged (U) or Unknown (X) status
4879                 print "</tr>\n";
4880         }
4881         print "</tbody>" if $has_header;
4882         print "</table>\n";
4883 }
4884
4885 sub print_sidebyside_diff_chunk {
4886         my @chunk = @_;
4887         my (@ctx, @rem, @add);
4888
4889         return unless @chunk;
4890
4891         # incomplete last line might be among removed or added lines,
4892         # or both, or among context lines: find which
4893         for (my $i = 1; $i < @chunk; $i++) {
4894                 if ($chunk[$i][0] eq 'incomplete') {
4895                         $chunk[$i][0] = $chunk[$i-1][0];
4896                 }
4897         }
4898
4899         # guardian
4900         push @chunk, ["", ""];
4901
4902         foreach my $line_info (@chunk) {
4903                 my ($class, $line) = @$line_info;
4904
4905                 # print chunk headers
4906                 if ($class && $class eq 'chunk_header') {
4907                         print $line;
4908                         next;
4909                 }
4910
4911                 ## print from accumulator when type of class of lines change
4912                 # empty contents block on start rem/add block, or end of chunk
4913                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4914                         print join '',
4915                                 '<div class="chunk_block ctx">',
4916                                         '<div class="old">',
4917                                         @ctx,
4918                                         '</div>',
4919                                         '<div class="new">',
4920                                         @ctx,
4921                                         '</div>',
4922                                 '</div>';
4923                         @ctx = ();
4924                 }
4925                 # empty add/rem block on start context block, or end of chunk
4926                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4927                         if (!@add) {
4928                                 # pure removal
4929                                 print join '',
4930                                         '<div class="chunk_block rem">',
4931                                                 '<div class="old">',
4932                                                 @rem,
4933                                                 '</div>',
4934                                         '</div>';
4935                         } elsif (!@rem) {
4936                                 # pure addition
4937                                 print join '',
4938                                         '<div class="chunk_block add">',
4939                                                 '<div class="new">',
4940                                                 @add,
4941                                                 '</div>',
4942                                         '</div>';
4943                         } else {
4944                                 # assume that it is change
4945                                 print join '',
4946                                         '<div class="chunk_block chg">',
4947                                                 '<div class="old">',
4948                                                 @rem,
4949                                                 '</div>',
4950                                                 '<div class="new">',
4951                                                 @add,
4952                                                 '</div>',
4953                                         '</div>';
4954                         }
4955                         @rem = @add = ();
4956                 }
4957
4958                 ## adding lines to accumulator
4959                 # guardian value
4960                 last unless $line;
4961                 # rem, add or change
4962                 if ($class eq 'rem') {
4963                         push @rem, $line;
4964                 } elsif ($class eq 'add') {
4965                         push @add, $line;
4966                 }
4967                 # context line
4968                 if ($class eq 'ctx') {
4969                         push @ctx, $line;
4970                 }
4971         }
4972 }
4973
4974 sub git_patchset_body {
4975         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4976         my ($hash_parent) = $hash_parents[0];
4977
4978         my $is_combined = (@hash_parents > 1);
4979         my $patch_idx = 0;
4980         my $patch_number = 0;
4981         my $patch_line;
4982         my $diffinfo;
4983         my $to_name;
4984         my (%from, %to);
4985         my @chunk; # for side-by-side diff
4986
4987         print "<div class=\"patchset\">\n";
4988
4989         # skip to first patch
4990         while ($patch_line = <$fd>) {
4991                 chomp $patch_line;
4992
4993                 last if ($patch_line =~ m/^diff /);
4994         }
4995
4996  PATCH:
4997         while ($patch_line) {
4998
4999                 # parse "git diff" header line
5000                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5001                         # $1 is from_name, which we do not use
5002                         $to_name = unquote($2);
5003                         $to_name =~ s!^b/!!;
5004                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5005                         # $1 is 'cc' or 'combined', which we do not use
5006                         $to_name = unquote($2);
5007                 } else {
5008                         $to_name = undef;
5009                 }
5010
5011                 # check if current patch belong to current raw line
5012                 # and parse raw git-diff line if needed
5013                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5014                         # this is continuation of a split patch
5015                         print "<div class=\"patch cont\">\n";
5016                 } else {
5017                         # advance raw git-diff output if needed
5018                         $patch_idx++ if defined $diffinfo;
5019
5020                         # read and prepare patch information
5021                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5022
5023                         # compact combined diff output can have some patches skipped
5024                         # find which patch (using pathname of result) we are at now;
5025                         if ($is_combined) {
5026                                 while ($to_name ne $diffinfo->{'to_file'}) {
5027                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5028                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5029                                               "</div>\n";  # class="patch"
5030
5031                                         $patch_idx++;
5032                                         $patch_number++;
5033
5034                                         last if $patch_idx > $#$difftree;
5035                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5036                                 }
5037                         }
5038
5039                         # modifies %from, %to hashes
5040                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5041
5042                         # this is first patch for raw difftree line with $patch_idx index
5043                         # we index @$difftree array from 0, but number patches from 1
5044                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5045                 }
5046
5047                 # git diff header
5048                 #assert($patch_line =~ m/^diff /) if DEBUG;
5049                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5050                 $patch_number++;
5051                 # print "git diff" header
5052                 print format_git_diff_header_line($patch_line, $diffinfo,
5053                                                   \%from, \%to);
5054
5055                 # print extended diff header
5056                 print "<div class=\"diff extended_header\">\n";
5057         EXTENDED_HEADER:
5058                 while ($patch_line = <$fd>) {
5059                         chomp $patch_line;
5060
5061                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5062
5063                         print format_extended_diff_header_line($patch_line, $diffinfo,
5064                                                                \%from, \%to);
5065                 }
5066                 print "</div>\n"; # class="diff extended_header"
5067
5068                 # from-file/to-file diff header
5069                 if (! $patch_line) {
5070                         print "</div>\n"; # class="patch"
5071                         last PATCH;
5072                 }
5073                 next PATCH if ($patch_line =~ m/^diff /);
5074                 #assert($patch_line =~ m/^---/) if DEBUG;
5075
5076                 my $last_patch_line = $patch_line;
5077                 $patch_line = <$fd>;
5078                 chomp $patch_line;
5079                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5080
5081                 print format_diff_from_to_header($last_patch_line, $patch_line,
5082                                                  $diffinfo, \%from, \%to,
5083                                                  @hash_parents);
5084
5085                 # the patch itself
5086         LINE:
5087                 while ($patch_line = <$fd>) {
5088                         chomp $patch_line;
5089
5090                         next PATCH if ($patch_line =~ m/^diff /);
5091
5092                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5093                         my $diff_classes = "diff";
5094                         $diff_classes .= " $class" if ($class);
5095                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5096
5097                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5098                                 if ($class eq 'chunk_header') {
5099                                         print_sidebyside_diff_chunk(@chunk);
5100                                         @chunk = ( [ $class, $line ] );
5101                                 } else {
5102                                         push @chunk, [ $class, $line ];
5103                                 }
5104                         } else {
5105                                 # default 'inline' style and unknown styles
5106                                 print $line;
5107                         }
5108                 }
5109
5110         } continue {
5111                 if (@chunk) {
5112                         print_sidebyside_diff_chunk(@chunk);
5113                         @chunk = ();
5114                 }
5115                 print "</div>\n"; # class="patch"
5116         }
5117
5118         # for compact combined (--cc) format, with chunk and patch simplification
5119         # the patchset might be empty, but there might be unprocessed raw lines
5120         for (++$patch_idx if $patch_number > 0;
5121              $patch_idx < @$difftree;
5122              ++$patch_idx) {
5123                 # read and prepare patch information
5124                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5125
5126                 # generate anchor for "patch" links in difftree / whatchanged part
5127                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5128                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5129                       "</div>\n";  # class="patch"
5130
5131                 $patch_number++;
5132         }
5133
5134         if ($patch_number == 0) {
5135                 if (@hash_parents > 1) {
5136                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5137                 } else {
5138                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5139                 }
5140         }
5141
5142         print "</div>\n"; # class="patchset"
5143 }
5144
5145 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5146
5147 # fills project list info (age, description, owner, category, forks)
5148 # for each project in the list, removing invalid projects from
5149 # returned list
5150 # NOTE: modifies $projlist, but does not remove entries from it
5151 sub fill_project_list_info {
5152         my $projlist = shift;
5153         my @projects;
5154
5155         my $show_ctags = gitweb_check_feature('ctags');
5156  PROJECT:
5157         foreach my $pr (@$projlist) {
5158                 my (@activity) = git_get_last_activity($pr->{'path'});
5159                 unless (@activity) {
5160                         next PROJECT;
5161                 }
5162                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5163                 if (!defined $pr->{'descr'}) {
5164                         my $descr = git_get_project_description($pr->{'path'}) || "";
5165                         $descr = to_utf8($descr);
5166                         $pr->{'descr_long'} = $descr;
5167                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5168                 }
5169                 if (!defined $pr->{'owner'}) {
5170                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5171                 }
5172                 if ($show_ctags) {
5173                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5174                 }
5175                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5176                         my $cat = git_get_project_category($pr->{'path'}) ||
5177                                                            $project_list_default_category;
5178                         $pr->{'category'} = to_utf8($cat);
5179                 }
5180
5181                 push @projects, $pr;
5182         }
5183
5184         return @projects;
5185 }
5186
5187 sub sort_projects_list {
5188         my ($projlist, $order) = @_;
5189         my @projects;
5190
5191         my %order_info = (
5192                 project => { key => 'path', type => 'str' },
5193                 descr => { key => 'descr_long', type => 'str' },
5194                 owner => { key => 'owner', type => 'str' },
5195                 age => { key => 'age', type => 'num' }
5196         );
5197         my $oi = $order_info{$order};
5198         return @$projlist unless defined $oi;
5199         if ($oi->{'type'} eq 'str') {
5200                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5201         } else {
5202                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5203         }
5204
5205         return @projects;
5206 }
5207
5208 # returns a hash of categories, containing the list of project
5209 # belonging to each category
5210 sub build_projlist_by_category {
5211         my ($projlist, $from, $to) = @_;
5212         my %categories;
5213
5214         $from = 0 unless defined $from;
5215         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5216
5217         for (my $i = $from; $i <= $to; $i++) {
5218                 my $pr = $projlist->[$i];
5219                 push @{$categories{ $pr->{'category'} }}, $pr;
5220         }
5221
5222         return wantarray ? %categories : \%categories;
5223 }
5224
5225 # print 'sort by' <th> element, generating 'sort by $name' replay link
5226 # if that order is not selected
5227 sub print_sort_th {
5228         print format_sort_th(@_);
5229 }
5230
5231 sub format_sort_th {
5232         my ($name, $order, $header) = @_;
5233         my $sort_th = "";
5234         $header ||= ucfirst($name);
5235
5236         if ($order eq $name) {
5237                 $sort_th .= "<th>$header</th>\n";
5238         } else {
5239                 $sort_th .= "<th>" .
5240                             $cgi->a({-href => href(-replay=>1, order=>$name),
5241                                      -class => "header"}, $header) .
5242                             "</th>\n";
5243         }
5244
5245         return $sort_th;
5246 }
5247
5248 sub git_project_list_rows {
5249         my ($projlist, $from, $to, $check_forks) = @_;
5250
5251         $from = 0 unless defined $from;
5252         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5253
5254         my $alternate = 1;
5255         for (my $i = $from; $i <= $to; $i++) {
5256                 my $pr = $projlist->[$i];
5257
5258                 if ($alternate) {
5259                         print "<tr class=\"dark\">\n";
5260                 } else {
5261                         print "<tr class=\"light\">\n";
5262                 }
5263                 $alternate ^= 1;
5264
5265                 if ($check_forks) {
5266                         print "<td>";
5267                         if ($pr->{'forks'}) {
5268                                 my $nforks = scalar @{$pr->{'forks'}};
5269                                 if ($nforks > 0) {
5270                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5271                                                        -title => "$nforks forks"}, "+");
5272                                 } else {
5273                                         print $cgi->span({-title => "$nforks forks"}, "+");
5274                                 }
5275                         }
5276                         print "</td>\n";
5277                 }
5278                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5279                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5280                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5281                                         -class => "list", -title => $pr->{'descr_long'}},
5282                                         esc_html($pr->{'descr'})) . "</td>\n" .
5283                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5284                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5285                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5286                       "<td class=\"link\">" .
5287                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5288                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5289                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5290                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5291                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5292                       "</td>\n" .
5293                       "</tr>\n";
5294         }
5295 }
5296
5297 sub git_project_list_body {
5298         # actually uses global variable $project
5299         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5300         my @projects = @$projlist;
5301
5302         my $check_forks = gitweb_check_feature('forks');
5303         my $show_ctags  = gitweb_check_feature('ctags');
5304         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5305         $check_forks = undef
5306                 if ($tagfilter || $searchtext);
5307
5308         # filtering out forks before filling info allows to do less work
5309         @projects = filter_forks_from_projects_list(\@projects)
5310                 if ($check_forks);
5311         @projects = fill_project_list_info(\@projects);
5312         # searching projects require filling to be run before it
5313         @projects = search_projects_list(\@projects,
5314                                          'searchtext' => $searchtext,
5315                                          'tagfilter'  => $tagfilter)
5316                 if ($tagfilter || $searchtext);
5317
5318         $order ||= $default_projects_order;
5319         $from = 0 unless defined $from;
5320         $to = $#projects if (!defined $to || $#projects < $to);
5321
5322         # short circuit
5323         if ($from > $to) {
5324                 print "<center>\n".
5325                       "<b>No such projects found</b><br />\n".
5326                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5327                       "</center>\n<br />\n";
5328                 return;
5329         }
5330
5331         @projects = sort_projects_list(\@projects, $order);
5332
5333         if ($show_ctags) {
5334                 my $ctags = git_gather_all_ctags(\@projects);
5335                 my $cloud = git_populate_project_tagcloud($ctags);
5336                 print git_show_project_tagcloud($cloud, 64);
5337         }
5338
5339         print "<table class=\"project_list\">\n";
5340         unless ($no_header) {
5341                 print "<tr>\n";
5342                 if ($check_forks) {
5343                         print "<th></th>\n";
5344                 }
5345                 print_sort_th('project', $order, 'Project');
5346                 print_sort_th('descr', $order, 'Description');
5347                 print_sort_th('owner', $order, 'Owner');
5348                 print_sort_th('age', $order, 'Last Change');
5349                 print "<th></th>\n" . # for links
5350                       "</tr>\n";
5351         }
5352
5353         if ($projects_list_group_categories) {
5354                 # only display categories with projects in the $from-$to window
5355                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5356                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5357                 foreach my $cat (sort keys %categories) {
5358                         unless ($cat eq "") {
5359                                 print "<tr>\n";
5360                                 if ($check_forks) {
5361                                         print "<td></td>\n";
5362                                 }
5363                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5364                                 print "</tr>\n";
5365                         }
5366
5367                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5368                 }
5369         } else {
5370                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5371         }
5372
5373         if (defined $extra) {
5374                 print "<tr>\n";
5375                 if ($check_forks) {
5376                         print "<td></td>\n";
5377                 }
5378                 print "<td colspan=\"5\">$extra</td>\n" .
5379                       "</tr>\n";
5380         }
5381         print "</table>\n";
5382 }
5383
5384 sub git_log_body {
5385         # uses global variable $project
5386         my ($commitlist, $from, $to, $refs, $extra) = @_;
5387
5388         $from = 0 unless defined $from;
5389         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5390
5391         for (my $i = 0; $i <= $to; $i++) {
5392                 my %co = %{$commitlist->[$i]};
5393                 next if !%co;
5394                 my $commit = $co{'id'};
5395                 my $ref = format_ref_marker($refs, $commit);
5396                 git_print_header_div('commit',
5397                                "<span class=\"age\">$co{'age_string'}</span>" .
5398                                esc_html($co{'title'}) . $ref,
5399                                $commit);
5400                 print "<div class=\"title_text\">\n" .
5401                       "<div class=\"log_link\">\n" .
5402                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5403                       " | " .
5404                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5405                       " | " .
5406                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5407                       "<br/>\n" .
5408                       "</div>\n";
5409                       git_print_authorship(\%co, -tag => 'span');
5410                       print "<br/>\n</div>\n";
5411
5412                 print "<div class=\"log_body\">\n";
5413                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5414                 print "</div>\n";
5415         }
5416         if ($extra) {
5417                 print "<div class=\"page_nav\">\n";
5418                 print "$extra\n";
5419                 print "</div>\n";
5420         }
5421 }
5422
5423 sub git_shortlog_body {
5424         # uses global variable $project
5425         my ($commitlist, $from, $to, $refs, $extra) = @_;
5426
5427         $from = 0 unless defined $from;
5428         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5429
5430         print "<table class=\"shortlog\">\n";
5431         my $alternate = 1;
5432         for (my $i = $from; $i <= $to; $i++) {
5433                 my %co = %{$commitlist->[$i]};
5434                 my $commit = $co{'id'};
5435                 my $ref = format_ref_marker($refs, $commit);
5436                 if ($alternate) {
5437                         print "<tr class=\"dark\">\n";
5438                 } else {
5439                         print "<tr class=\"light\">\n";
5440                 }
5441                 $alternate ^= 1;
5442                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5443                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5444                       format_author_html('td', \%co, 10) . "<td>";
5445                 print format_subject_html($co{'title'}, $co{'title_short'},
5446                                           href(action=>"commit", hash=>$commit), $ref);
5447                 print "</td>\n" .
5448                       "<td class=\"link\">" .
5449                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5450                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5451                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5452                 my $snapshot_links = format_snapshot_links($commit);
5453                 if (defined $snapshot_links) {
5454                         print " | " . $snapshot_links;
5455                 }
5456                 print "</td>\n" .
5457                       "</tr>\n";
5458         }
5459         if (defined $extra) {
5460                 print "<tr>\n" .
5461                       "<td colspan=\"4\">$extra</td>\n" .
5462                       "</tr>\n";
5463         }
5464         print "</table>\n";
5465 }
5466
5467 sub git_history_body {
5468         # Warning: assumes constant type (blob or tree) during history
5469         my ($commitlist, $from, $to, $refs, $extra,
5470             $file_name, $file_hash, $ftype) = @_;
5471
5472         $from = 0 unless defined $from;
5473         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5474
5475         print "<table class=\"history\">\n";
5476         my $alternate = 1;
5477         for (my $i = $from; $i <= $to; $i++) {
5478                 my %co = %{$commitlist->[$i]};
5479                 if (!%co) {
5480                         next;
5481                 }
5482                 my $commit = $co{'id'};
5483
5484                 my $ref = format_ref_marker($refs, $commit);
5485
5486                 if ($alternate) {
5487                         print "<tr class=\"dark\">\n";
5488                 } else {
5489                         print "<tr class=\"light\">\n";
5490                 }
5491                 $alternate ^= 1;
5492                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5493         # shortlog:   format_author_html('td', \%co, 10)
5494                       format_author_html('td', \%co, 15, 3) . "<td>";
5495                 # originally git_history used chop_str($co{'title'}, 50)
5496                 print format_subject_html($co{'title'}, $co{'title_short'},
5497                                           href(action=>"commit", hash=>$commit), $ref);
5498                 print "</td>\n" .
5499                       "<td class=\"link\">" .
5500                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5501                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5502
5503                 if ($ftype eq 'blob') {
5504                         my $blob_current = $file_hash;
5505                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5506                         if (defined $blob_current && defined $blob_parent &&
5507                                         $blob_current ne $blob_parent) {
5508                                 print " | " .
5509                                         $cgi->a({-href => href(action=>"blobdiff",
5510                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5511                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5512                                                                file_name=>$file_name)},
5513                                                 "diff to current");
5514                         }
5515                 }
5516                 print "</td>\n" .
5517                       "</tr>\n";
5518         }
5519         if (defined $extra) {
5520                 print "<tr>\n" .
5521                       "<td colspan=\"4\">$extra</td>\n" .
5522                       "</tr>\n";
5523         }
5524         print "</table>\n";
5525 }
5526
5527 sub git_tags_body {
5528         # uses global variable $project
5529         my ($taglist, $from, $to, $extra) = @_;
5530         $from = 0 unless defined $from;
5531         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5532
5533         print "<table class=\"tags\">\n";
5534         my $alternate = 1;
5535         for (my $i = $from; $i <= $to; $i++) {
5536                 my $entry = $taglist->[$i];
5537                 my %tag = %$entry;
5538                 my $comment = $tag{'subject'};
5539                 my $comment_short;
5540                 if (defined $comment) {
5541                         $comment_short = chop_str($comment, 30, 5);
5542                 }
5543                 if ($alternate) {
5544                         print "<tr class=\"dark\">\n";
5545                 } else {
5546                         print "<tr class=\"light\">\n";
5547                 }
5548                 $alternate ^= 1;
5549                 if (defined $tag{'age'}) {
5550                         print "<td><i>$tag{'age'}</i></td>\n";
5551                 } else {
5552                         print "<td></td>\n";
5553                 }
5554                 print "<td>" .
5555                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5556                                -class => "list name"}, esc_html($tag{'name'})) .
5557                       "</td>\n" .
5558                       "<td>";
5559                 if (defined $comment) {
5560                         print format_subject_html($comment, $comment_short,
5561                                                   href(action=>"tag", hash=>$tag{'id'}));
5562                 }
5563                 print "</td>\n" .
5564                       "<td class=\"selflink\">";
5565                 if ($tag{'type'} eq "tag") {
5566                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5567                 } else {
5568                         print "&nbsp;";
5569                 }
5570                 print "</td>\n" .
5571                       "<td class=\"link\">" . " | " .
5572                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5573                 if ($tag{'reftype'} eq "commit") {
5574                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5575                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5576                 } elsif ($tag{'reftype'} eq "blob") {
5577                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5578                 }
5579                 print "</td>\n" .
5580                       "</tr>";
5581         }
5582         if (defined $extra) {
5583                 print "<tr>\n" .
5584                       "<td colspan=\"5\">$extra</td>\n" .
5585                       "</tr>\n";
5586         }
5587         print "</table>\n";
5588 }
5589
5590 sub git_heads_body {
5591         # uses global variable $project
5592         my ($headlist, $head, $from, $to, $extra) = @_;
5593         $from = 0 unless defined $from;
5594         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5595
5596         print "<table class=\"heads\">\n";
5597         my $alternate = 1;
5598         for (my $i = $from; $i <= $to; $i++) {
5599                 my $entry = $headlist->[$i];
5600                 my %ref = %$entry;
5601                 my $curr = $ref{'id'} eq $head;
5602                 if ($alternate) {
5603                         print "<tr class=\"dark\">\n";
5604                 } else {
5605                         print "<tr class=\"light\">\n";
5606                 }
5607                 $alternate ^= 1;
5608                 print "<td><i>$ref{'age'}</i></td>\n" .
5609                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5610                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5611                                -class => "list name"},esc_html($ref{'name'})) .
5612                       "</td>\n" .
5613                       "<td class=\"link\">" .
5614                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5615                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5616                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5617                       "</td>\n" .
5618                       "</tr>";
5619         }
5620         if (defined $extra) {
5621                 print "<tr>\n" .
5622                       "<td colspan=\"3\">$extra</td>\n" .
5623                       "</tr>\n";
5624         }
5625         print "</table>\n";
5626 }
5627
5628 # Display a single remote block
5629 sub git_remote_block {
5630         my ($remote, $rdata, $limit, $head) = @_;
5631
5632         my $heads = $rdata->{'heads'};
5633         my $fetch = $rdata->{'fetch'};
5634         my $push = $rdata->{'push'};
5635
5636         my $urls_table = "<table class=\"projects_list\">\n" ;
5637
5638         if (defined $fetch) {
5639                 if ($fetch eq $push) {
5640                         $urls_table .= format_repo_url("URL", $fetch);
5641                 } else {
5642                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5643                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5644                 }
5645         } elsif (defined $push) {
5646                 $urls_table .= format_repo_url("Push URL", $push);
5647         } else {
5648                 $urls_table .= format_repo_url("", "No remote URL");
5649         }
5650
5651         $urls_table .= "</table>\n";
5652
5653         my $dots;
5654         if (defined $limit && $limit < @$heads) {
5655                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5656         }
5657
5658         print $urls_table;
5659         git_heads_body($heads, $head, 0, $limit, $dots);
5660 }
5661
5662 # Display a list of remote names with the respective fetch and push URLs
5663 sub git_remotes_list {
5664         my ($remotedata, $limit) = @_;
5665         print "<table class=\"heads\">\n";
5666         my $alternate = 1;
5667         my @remotes = sort keys %$remotedata;
5668
5669         my $limited = $limit && $limit < @remotes;
5670
5671         $#remotes = $limit - 1 if $limited;
5672
5673         while (my $remote = shift @remotes) {
5674                 my $rdata = $remotedata->{$remote};
5675                 my $fetch = $rdata->{'fetch'};
5676                 my $push = $rdata->{'push'};
5677                 if ($alternate) {
5678                         print "<tr class=\"dark\">\n";
5679                 } else {
5680                         print "<tr class=\"light\">\n";
5681                 }
5682                 $alternate ^= 1;
5683                 print "<td>" .
5684                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5685                                -class=> "list name"},esc_html($remote)) .
5686                       "</td>";
5687                 print "<td class=\"link\">" .
5688                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5689                       " | " .
5690                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5691                       "</td>";
5692
5693                 print "</tr>\n";
5694         }
5695
5696         if ($limited) {
5697                 print "<tr>\n" .
5698                       "<td colspan=\"3\">" .
5699                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5700                       "</td>\n" . "</tr>\n";
5701         }
5702
5703         print "</table>";
5704 }
5705
5706 # Display remote heads grouped by remote, unless there are too many
5707 # remotes, in which case we only display the remote names
5708 sub git_remotes_body {
5709         my ($remotedata, $limit, $head) = @_;
5710         if ($limit and $limit < keys %$remotedata) {
5711                 git_remotes_list($remotedata, $limit);
5712         } else {
5713                 fill_remote_heads($remotedata);
5714                 while (my ($remote, $rdata) = each %$remotedata) {
5715                         git_print_section({-class=>"remote", -id=>$remote},
5716                                 ["remotes", $remote, $remote], sub {
5717                                         git_remote_block($remote, $rdata, $limit, $head);
5718                                 });
5719                 }
5720         }
5721 }
5722
5723 sub git_search_message {
5724         my %co = @_;
5725
5726         my $greptype;
5727         if ($searchtype eq 'commit') {
5728                 $greptype = "--grep=";
5729         } elsif ($searchtype eq 'author') {
5730                 $greptype = "--author=";
5731         } elsif ($searchtype eq 'committer') {
5732                 $greptype = "--committer=";
5733         }
5734         $greptype .= $searchtext;
5735         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5736                                        $greptype, '--regexp-ignore-case',
5737                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5738
5739         my $paging_nav = '';
5740         if ($page > 0) {
5741                 $paging_nav .=
5742                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5743                                 "first") .
5744                         " &sdot; " .
5745                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5746                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5747         } else {
5748                 $paging_nav .= "first &sdot; prev";
5749         }
5750         my $next_link = '';
5751         if ($#commitlist >= 100) {
5752                 $next_link =
5753                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5754                                  -accesskey => "n", -title => "Alt-n"}, "next");
5755                 $paging_nav .= " &sdot; $next_link";
5756         } else {
5757                 $paging_nav .= " &sdot; next";
5758         }
5759
5760         git_header_html();
5761
5762         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5763         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5764         if ($page == 0 && !@commitlist) {
5765                 print "<p>No match.</p>\n";
5766         } else {
5767                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5768         }
5769
5770         git_footer_html();
5771 }
5772
5773 sub git_search_changes {
5774         my %co = @_;
5775
5776         local $/ = "\n";
5777         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5778                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5779                 ($search_use_regexp ? '--pickaxe-regex' : ())
5780                         or die_error(500, "Open git-log failed");
5781
5782         git_header_html();
5783
5784         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5785         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5786
5787         print "<table class=\"pickaxe search\">\n";
5788         my $alternate = 1;
5789         undef %co;
5790         my @files;
5791         while (my $line = <$fd>) {
5792                 chomp $line;
5793                 next unless $line;
5794
5795                 my %set = parse_difftree_raw_line($line);
5796                 if (defined $set{'commit'}) {
5797                         # finish previous commit
5798                         if (%co) {
5799                                 print "</td>\n" .
5800                                       "<td class=\"link\">" .
5801                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5802                                               "commit") .
5803                                       " | " .
5804                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5805                                                              hash_base=>$co{'id'})},
5806                                               "tree") .
5807                                       "</td>\n" .
5808                                       "</tr>\n";
5809                         }
5810
5811                         if ($alternate) {
5812                                 print "<tr class=\"dark\">\n";
5813                         } else {
5814                                 print "<tr class=\"light\">\n";
5815                         }
5816                         $alternate ^= 1;
5817                         %co = parse_commit($set{'commit'});
5818                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5819                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5820                               "<td><i>$author</i></td>\n" .
5821                               "<td>" .
5822                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5823                                       -class => "list subject"},
5824                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5825                 } elsif (defined $set{'to_id'}) {
5826                         next if ($set{'to_id'} =~ m/^0{40}$/);
5827
5828                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5829                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5830                                       -class => "list"},
5831                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5832                               "<br/>\n";
5833                 }
5834         }
5835         close $fd;
5836
5837         # finish last commit (warning: repetition!)
5838         if (%co) {
5839                 print "</td>\n" .
5840                       "<td class=\"link\">" .
5841                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5842                               "commit") .
5843                       " | " .
5844                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5845                                              hash_base=>$co{'id'})},
5846                               "tree") .
5847                       "</td>\n" .
5848                       "</tr>\n";
5849         }
5850
5851         print "</table>\n";
5852
5853         git_footer_html();
5854 }
5855
5856 sub git_search_files {
5857         my %co = @_;
5858
5859         local $/ = "\n";
5860         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5861                 $search_use_regexp ? ('-E', '-i') : '-F',
5862                 $searchtext, $co{'tree'}
5863                         or die_error(500, "Open git-grep failed");
5864
5865         git_header_html();
5866
5867         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5868         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5869
5870         print "<table class=\"grep_search\">\n";
5871         my $alternate = 1;
5872         my $matches = 0;
5873         my $lastfile = '';
5874         while (my $line = <$fd>) {
5875                 chomp $line;
5876                 my ($file, $file_href, $lno, $ltext, $binary);
5877                 last if ($matches++ > 1000);
5878                 if ($line =~ /^Binary file (.+) matches$/) {
5879                         $file = $1;
5880                         $binary = 1;
5881                 } else {
5882                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5883                         $file =~ s/^$co{'tree'}://;
5884                 }
5885                 if ($file ne $lastfile) {
5886                         $lastfile and print "</td></tr>\n";
5887                         if ($alternate++) {
5888                                 print "<tr class=\"dark\">\n";
5889                         } else {
5890                                 print "<tr class=\"light\">\n";
5891                         }
5892                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5893                                           file_name=>$file);
5894                         print "<td class=\"list\">".
5895                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5896                         print "</td><td>\n";
5897                         $lastfile = $file;
5898                 }
5899                 if ($binary) {
5900                         print "<div class=\"binary\">Binary file</div>\n";
5901                 } else {
5902                         $ltext = untabify($ltext);
5903                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5904                                 $ltext = esc_html($1, -nbsp=>1);
5905                                 $ltext .= '<span class="match">';
5906                                 $ltext .= esc_html($2, -nbsp=>1);
5907                                 $ltext .= '</span>';
5908                                 $ltext .= esc_html($3, -nbsp=>1);
5909                         } else {
5910                                 $ltext = esc_html($ltext, -nbsp=>1);
5911                         }
5912                         print "<div class=\"pre\">" .
5913                                 $cgi->a({-href => $file_href.'#l'.$lno,
5914                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5915                                 ' ' .  $ltext . "</div>\n";
5916                 }
5917         }
5918         if ($lastfile) {
5919                 print "</td></tr>\n";
5920                 if ($matches > 1000) {
5921                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5922                 }
5923         } else {
5924                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5925         }
5926         close $fd;
5927
5928         print "</table>\n";
5929
5930         git_footer_html();
5931 }
5932
5933 sub git_search_grep_body {
5934         my ($commitlist, $from, $to, $extra) = @_;
5935         $from = 0 unless defined $from;
5936         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5937
5938         print "<table class=\"commit_search\">\n";
5939         my $alternate = 1;
5940         for (my $i = $from; $i <= $to; $i++) {
5941                 my %co = %{$commitlist->[$i]};
5942                 if (!%co) {
5943                         next;
5944                 }
5945                 my $commit = $co{'id'};
5946                 if ($alternate) {
5947                         print "<tr class=\"dark\">\n";
5948                 } else {
5949                         print "<tr class=\"light\">\n";
5950                 }
5951                 $alternate ^= 1;
5952                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5953                       format_author_html('td', \%co, 15, 5) .
5954                       "<td>" .
5955                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5956                                -class => "list subject"},
5957                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5958                 my $comment = $co{'comment'};
5959                 foreach my $line (@$comment) {
5960                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5961                                 my ($lead, $match, $trail) = ($1, $2, $3);
5962                                 $match = chop_str($match, 70, 5, 'center');
5963                                 my $contextlen = int((80 - length($match))/2);
5964                                 $contextlen = 30 if ($contextlen > 30);
5965                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5966                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5967
5968                                 $lead  = esc_html($lead);
5969                                 $match = esc_html($match);
5970                                 $trail = esc_html($trail);
5971
5972                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5973                         }
5974                 }
5975                 print "</td>\n" .
5976                       "<td class=\"link\">" .
5977                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5978                       " | " .
5979                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5980                       " | " .
5981                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5982                 print "</td>\n" .
5983                       "</tr>\n";
5984         }
5985         if (defined $extra) {
5986                 print "<tr>\n" .
5987                       "<td colspan=\"3\">$extra</td>\n" .
5988                       "</tr>\n";
5989         }
5990         print "</table>\n";
5991 }
5992
5993 ## ======================================================================
5994 ## ======================================================================
5995 ## actions
5996
5997 sub git_project_list {
5998         my $order = $input_params{'order'};
5999         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6000                 die_error(400, "Unknown order parameter");
6001         }
6002
6003         my @list = git_get_projects_list($project_filter, $strict_export);
6004         if (!@list) {
6005                 die_error(404, "No projects found");
6006         }
6007
6008         git_header_html();
6009         if (defined $home_text && -f $home_text) {
6010                 print "<div class=\"index_include\">\n";
6011                 insert_file($home_text);
6012                 print "</div>\n";
6013         }
6014         print $cgi->startform(-method => "get") .
6015               "<p class=\"projsearch\">Search:\n" .
6016               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6017               "</p>" .
6018               $cgi->end_form() . "\n";
6019         git_project_list_body(\@list, $order);
6020         git_footer_html();
6021 }
6022
6023 sub git_forks {
6024         my $order = $input_params{'order'};
6025         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6026                 die_error(400, "Unknown order parameter");
6027         }
6028
6029         my $filter = $project;
6030         $filter =~ s/\.git$//;
6031         my @list = git_get_projects_list($filter);
6032         if (!@list) {
6033                 die_error(404, "No forks found");
6034         }
6035
6036         git_header_html();
6037         git_print_page_nav('','');
6038         git_print_header_div('summary', "$project forks");
6039         git_project_list_body(\@list, $order);
6040         git_footer_html();
6041 }
6042
6043 sub git_project_index {
6044         my @projects = git_get_projects_list($project_filter, $strict_export);
6045         if (!@projects) {
6046                 die_error(404, "No projects found");
6047         }
6048
6049         print $cgi->header(
6050                 -type => 'text/plain',
6051                 -charset => 'utf-8',
6052                 -content_disposition => 'inline; filename="index.aux"');
6053
6054         foreach my $pr (@projects) {
6055                 if (!exists $pr->{'owner'}) {
6056                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6057                 }
6058
6059                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6060                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6061                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6062                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6063                 $path  =~ s/ /\+/g;
6064                 $owner =~ s/ /\+/g;
6065
6066                 print "$path $owner\n";
6067         }
6068 }
6069
6070 sub git_summary {
6071         my $descr = git_get_project_description($project) || "none";
6072         my %co = parse_commit("HEAD");
6073         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6074         my $head = $co{'id'};
6075         my $remote_heads = gitweb_check_feature('remote_heads');
6076
6077         my $owner = git_get_project_owner($project);
6078
6079         my $refs = git_get_references();
6080         # These get_*_list functions return one more to allow us to see if
6081         # there are more ...
6082         my @taglist  = git_get_tags_list(16);
6083         my @headlist = git_get_heads_list(16);
6084         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6085         my @forklist;
6086         my $check_forks = gitweb_check_feature('forks');
6087
6088         if ($check_forks) {
6089                 # find forks of a project
6090                 my $filter = $project;
6091                 $filter =~ s/\.git$//;
6092                 @forklist = git_get_projects_list($filter);
6093                 # filter out forks of forks
6094                 @forklist = filter_forks_from_projects_list(\@forklist)
6095                         if (@forklist);
6096         }
6097
6098         git_header_html();
6099         git_print_page_nav('summary','', $head);
6100
6101         print "<div class=\"title\">&nbsp;</div>\n";
6102         print "<table class=\"projects_list\">\n" .
6103               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6104               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6105         if (defined $cd{'rfc2822'}) {
6106                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6107                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6108         }
6109
6110         # use per project git URL list in $projectroot/$project/cloneurl
6111         # or make project git URL from git base URL and project name
6112         my $url_tag = "URL";
6113         my @url_list = git_get_project_url_list($project);
6114         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6115         foreach my $git_url (@url_list) {
6116                 next unless $git_url;
6117                 print format_repo_url($url_tag, $git_url);
6118                 $url_tag = "";
6119         }
6120
6121         # Tag cloud
6122         my $show_ctags = gitweb_check_feature('ctags');
6123         if ($show_ctags) {
6124                 my $ctags = git_get_project_ctags($project);
6125                 if (%$ctags) {
6126                         # without ability to add tags, don't show if there are none
6127                         my $cloud = git_populate_project_tagcloud($ctags);
6128                         print "<tr id=\"metadata_ctags\">" .
6129                               "<td>content tags</td>" .
6130                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6131                               "</tr>\n";
6132                 }
6133         }
6134
6135         print "</table>\n";
6136
6137         # If XSS prevention is on, we don't include README.html.
6138         # TODO: Allow a readme in some safe format.
6139         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6140                 print "<div class=\"title\">readme</div>\n" .
6141                       "<div class=\"readme\">\n";
6142                 insert_file("$projectroot/$project/README.html");
6143                 print "\n</div>\n"; # class="readme"
6144         }
6145
6146         # we need to request one more than 16 (0..15) to check if
6147         # those 16 are all
6148         my @commitlist = $head ? parse_commits($head, 17) : ();
6149         if (@commitlist) {
6150                 git_print_header_div('shortlog');
6151                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6152                                   $#commitlist <=  15 ? undef :
6153                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6154         }
6155
6156         if (@taglist) {
6157                 git_print_header_div('tags');
6158                 git_tags_body(\@taglist, 0, 15,
6159                               $#taglist <=  15 ? undef :
6160                               $cgi->a({-href => href(action=>"tags")}, "..."));
6161         }
6162
6163         if (@headlist) {
6164                 git_print_header_div('heads');
6165                 git_heads_body(\@headlist, $head, 0, 15,
6166                                $#headlist <= 15 ? undef :
6167                                $cgi->a({-href => href(action=>"heads")}, "..."));
6168         }
6169
6170         if (%remotedata) {
6171                 git_print_header_div('remotes');
6172                 git_remotes_body(\%remotedata, 15, $head);
6173         }
6174
6175         if (@forklist) {
6176                 git_print_header_div('forks');
6177                 git_project_list_body(\@forklist, 'age', 0, 15,
6178                                       $#forklist <= 15 ? undef :
6179                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6180                                       'no_header');
6181         }
6182
6183         git_footer_html();
6184 }
6185
6186 sub git_tag {
6187         my %tag = parse_tag($hash);
6188
6189         if (! %tag) {
6190                 die_error(404, "Unknown tag object");
6191         }
6192
6193         my $head = git_get_head_hash($project);
6194         git_header_html();
6195         git_print_page_nav('','', $head,undef,$head);
6196         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6197         print "<div class=\"title_text\">\n" .
6198               "<table class=\"object_header\">\n" .
6199               "<tr>\n" .
6200               "<td>object</td>\n" .
6201               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6202                                $tag{'object'}) . "</td>\n" .
6203               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6204                                               $tag{'type'}) . "</td>\n" .
6205               "</tr>\n";
6206         if (defined($tag{'author'})) {
6207                 git_print_authorship_rows(\%tag, 'author');
6208         }
6209         print "</table>\n\n" .
6210               "</div>\n";
6211         print "<div class=\"page_body\">";
6212         my $comment = $tag{'comment'};
6213         foreach my $line (@$comment) {
6214                 chomp $line;
6215                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6216         }
6217         print "</div>\n";
6218         git_footer_html();
6219 }
6220
6221 sub git_blame_common {
6222         my $format = shift || 'porcelain';
6223         if ($format eq 'porcelain' && $cgi->param('js')) {
6224                 $format = 'incremental';
6225                 $action = 'blame_incremental'; # for page title etc
6226         }
6227
6228         # permissions
6229         gitweb_check_feature('blame')
6230                 or die_error(403, "Blame view not allowed");
6231
6232         # error checking
6233         die_error(400, "No file name given") unless $file_name;
6234         $hash_base ||= git_get_head_hash($project);
6235         die_error(404, "Couldn't find base commit") unless $hash_base;
6236         my %co = parse_commit($hash_base)
6237                 or die_error(404, "Commit not found");
6238         my $ftype = "blob";
6239         if (!defined $hash) {
6240                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6241                         or die_error(404, "Error looking up file");
6242         } else {
6243                 $ftype = git_get_type($hash);
6244                 if ($ftype !~ "blob") {
6245                         die_error(400, "Object is not a blob");
6246                 }
6247         }
6248
6249         my $fd;
6250         if ($format eq 'incremental') {
6251                 # get file contents (as base)
6252                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6253                         or die_error(500, "Open git-cat-file failed");
6254         } elsif ($format eq 'data') {
6255                 # run git-blame --incremental
6256                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6257                         $hash_base, "--", $file_name
6258                         or die_error(500, "Open git-blame --incremental failed");
6259         } else {
6260                 # run git-blame --porcelain
6261                 open $fd, "-|", git_cmd(), "blame", '-p',
6262                         $hash_base, '--', $file_name
6263                         or die_error(500, "Open git-blame --porcelain failed");
6264         }
6265
6266         # incremental blame data returns early
6267         if ($format eq 'data') {
6268                 print $cgi->header(
6269                         -type=>"text/plain", -charset => "utf-8",
6270                         -status=> "200 OK");
6271                 local $| = 1; # output autoflush
6272                 while (my $line = <$fd>) {
6273                         print to_utf8($line);
6274                 }
6275                 close $fd
6276                         or print "ERROR $!\n";
6277
6278                 print 'END';
6279                 if (defined $t0 && gitweb_check_feature('timed')) {
6280                         print ' '.
6281                               tv_interval($t0, [ gettimeofday() ]).
6282                               ' '.$number_of_git_cmds;
6283                 }
6284                 print "\n";
6285
6286                 return;
6287         }
6288
6289         # page header
6290         git_header_html();
6291         my $formats_nav =
6292                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6293                         "blob") .
6294                 " | ";
6295         if ($format eq 'incremental') {
6296                 $formats_nav .=
6297                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6298                                 "blame") . " (non-incremental)";
6299         } else {
6300                 $formats_nav .=
6301                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6302                                 "blame") . " (incremental)";
6303         }
6304         $formats_nav .=
6305                 " | " .
6306                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6307                         "history") .
6308                 " | " .
6309                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6310                         "HEAD");
6311         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6312         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6313         git_print_page_path($file_name, $ftype, $hash_base);
6314
6315         # page body
6316         if ($format eq 'incremental') {
6317                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6318                       "This page requires JavaScript to run.\n Use ".
6319                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6320                               'this page').
6321                       " instead.\n".
6322                       "</b></center></div>\n</noscript>\n";
6323
6324                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6325         }
6326
6327         print qq!<div class="page_body">\n!;
6328         print qq!<div id="progress_info">... / ...</div>\n!
6329                 if ($format eq 'incremental');
6330         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6331               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6332               qq!<thead>\n!.
6333               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6334               qq!</thead>\n!.
6335               qq!<tbody>\n!;
6336
6337         my @rev_color = qw(light dark);
6338         my $num_colors = scalar(@rev_color);
6339         my $current_color = 0;
6340
6341         if ($format eq 'incremental') {
6342                 my $color_class = $rev_color[$current_color];
6343
6344                 #contents of a file
6345                 my $linenr = 0;
6346         LINE:
6347                 while (my $line = <$fd>) {
6348                         chomp $line;
6349                         $linenr++;
6350
6351                         print qq!<tr id="l$linenr" class="$color_class">!.
6352                               qq!<td class="sha1"><a href=""> </a></td>!.
6353                               qq!<td class="linenr">!.
6354                               qq!<a class="linenr" href="">$linenr</a></td>!;
6355                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6356                         print qq!</tr>\n!;
6357                 }
6358
6359         } else { # porcelain, i.e. ordinary blame
6360                 my %metainfo = (); # saves information about commits
6361
6362                 # blame data
6363         LINE:
6364                 while (my $line = <$fd>) {
6365                         chomp $line;
6366                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6367                         # no <lines in group> for subsequent lines in group of lines
6368                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6369                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6370                         if (!exists $metainfo{$full_rev}) {
6371                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6372                         }
6373                         my $meta = $metainfo{$full_rev};
6374                         my $data;
6375                         while ($data = <$fd>) {
6376                                 chomp $data;
6377                                 last if ($data =~ s/^\t//); # contents of line
6378                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6379                                         $meta->{$1} = $2 unless exists $meta->{$1};
6380                                 }
6381                                 if ($data =~ /^previous /) {
6382                                         $meta->{'nprevious'}++;
6383                                 }
6384                         }
6385                         my $short_rev = substr($full_rev, 0, 8);
6386                         my $author = $meta->{'author'};
6387                         my %date =
6388                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6389                         my $date = $date{'iso-tz'};
6390                         if ($group_size) {
6391                                 $current_color = ($current_color + 1) % $num_colors;
6392                         }
6393                         my $tr_class = $rev_color[$current_color];
6394                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6395                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6396                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6397                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6398                         if ($group_size) {
6399                                 print "<td class=\"sha1\"";
6400                                 print " title=\"". esc_html($author) . ", $date\"";
6401                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6402                                 print ">";
6403                                 print $cgi->a({-href => href(action=>"commit",
6404                                                              hash=>$full_rev,
6405                                                              file_name=>$file_name)},
6406                                               esc_html($short_rev));
6407                                 if ($group_size >= 2) {
6408                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6409                                         if (@author_initials) {
6410                                                 print "<br />" .
6411                                                       esc_html(join('', @author_initials));
6412                                                 #           or join('.', ...)
6413                                         }
6414                                 }
6415                                 print "</td>\n";
6416                         }
6417                         # 'previous' <sha1 of parent commit> <filename at commit>
6418                         if (exists $meta->{'previous'} &&
6419                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6420                                 $meta->{'parent'} = $1;
6421                                 $meta->{'file_parent'} = unquote($2);
6422                         }
6423                         my $linenr_commit =
6424                                 exists($meta->{'parent'}) ?
6425                                 $meta->{'parent'} : $full_rev;
6426                         my $linenr_filename =
6427                                 exists($meta->{'file_parent'}) ?
6428                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6429                         my $blamed = href(action => 'blame',
6430                                           file_name => $linenr_filename,
6431                                           hash_base => $linenr_commit);
6432                         print "<td class=\"linenr\">";
6433                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6434                                         -class => "linenr" },
6435                                       esc_html($lineno));
6436                         print "</td>";
6437                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6438                         print "</tr>\n";
6439                 } # end while
6440
6441         }
6442
6443         # footer
6444         print "</tbody>\n".
6445               "</table>\n"; # class="blame"
6446         print "</div>\n";   # class="blame_body"
6447         close $fd
6448                 or print "Reading blob failed\n";
6449
6450         git_footer_html();
6451 }
6452
6453 sub git_blame {
6454         git_blame_common();
6455 }
6456
6457 sub git_blame_incremental {
6458         git_blame_common('incremental');
6459 }
6460
6461 sub git_blame_data {
6462         git_blame_common('data');
6463 }
6464
6465 sub git_tags {
6466         my $head = git_get_head_hash($project);
6467         git_header_html();
6468         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6469         git_print_header_div('summary', $project);
6470
6471         my @tagslist = git_get_tags_list();
6472         if (@tagslist) {
6473                 git_tags_body(\@tagslist);
6474         }
6475         git_footer_html();
6476 }
6477
6478 sub git_heads {
6479         my $head = git_get_head_hash($project);
6480         git_header_html();
6481         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6482         git_print_header_div('summary', $project);
6483
6484         my @headslist = git_get_heads_list();
6485         if (@headslist) {
6486                 git_heads_body(\@headslist, $head);
6487         }
6488         git_footer_html();
6489 }
6490
6491 # used both for single remote view and for list of all the remotes
6492 sub git_remotes {
6493         gitweb_check_feature('remote_heads')
6494                 or die_error(403, "Remote heads view is disabled");
6495
6496         my $head = git_get_head_hash($project);
6497         my $remote = $input_params{'hash'};
6498
6499         my $remotedata = git_get_remotes_list($remote);
6500         die_error(500, "Unable to get remote information") unless defined $remotedata;
6501
6502         unless (%$remotedata) {
6503                 die_error(404, defined $remote ?
6504                         "Remote $remote not found" :
6505                         "No remotes found");
6506         }
6507
6508         git_header_html(undef, undef, -action_extra => $remote);
6509         git_print_page_nav('', '',  $head, undef, $head,
6510                 format_ref_views($remote ? '' : 'remotes'));
6511
6512         fill_remote_heads($remotedata);
6513         if (defined $remote) {
6514                 git_print_header_div('remotes', "$remote remote for $project");
6515                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6516         } else {
6517                 git_print_header_div('summary', "$project remotes");
6518                 git_remotes_body($remotedata, undef, $head);
6519         }
6520
6521         git_footer_html();
6522 }
6523
6524 sub git_blob_plain {
6525         my $type = shift;
6526         my $expires;
6527
6528         if (!defined $hash) {
6529                 if (defined $file_name) {
6530                         my $base = $hash_base || git_get_head_hash($project);
6531                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6532                                 or die_error(404, "Cannot find file");
6533                 } else {
6534                         die_error(400, "No file name defined");
6535                 }
6536         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6537                 # blobs defined by non-textual hash id's can be cached
6538                 $expires = "+1d";
6539         }
6540
6541         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6542                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6543
6544         # content-type (can include charset)
6545         $type = blob_contenttype($fd, $file_name, $type);
6546
6547         # "save as" filename, even when no $file_name is given
6548         my $save_as = "$hash";
6549         if (defined $file_name) {
6550                 $save_as = $file_name;
6551         } elsif ($type =~ m/^text\//) {
6552                 $save_as .= '.txt';
6553         }
6554
6555         # With XSS prevention on, blobs of all types except a few known safe
6556         # ones are served with "Content-Disposition: attachment" to make sure
6557         # they don't run in our security domain.  For certain image types,
6558         # blob view writes an <img> tag referring to blob_plain view, and we
6559         # want to be sure not to break that by serving the image as an
6560         # attachment (though Firefox 3 doesn't seem to care).
6561         my $sandbox = $prevent_xss &&
6562                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6563
6564         # serve text/* as text/plain
6565         if ($prevent_xss &&
6566             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6567              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6568                 my $rest = $1;
6569                 $rest = defined $rest ? $rest : '';
6570                 $type = "text/plain$rest";
6571         }
6572
6573         print $cgi->header(
6574                 -type => $type,
6575                 -expires => $expires,
6576                 -content_disposition =>
6577                         ($sandbox ? 'attachment' : 'inline')
6578                         . '; filename="' . $save_as . '"');
6579         local $/ = undef;
6580         binmode STDOUT, ':raw';
6581         print <$fd>;
6582         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6583         close $fd;
6584 }
6585
6586 sub git_blob {
6587         my $expires;
6588
6589         if (!defined $hash) {
6590                 if (defined $file_name) {
6591                         my $base = $hash_base || git_get_head_hash($project);
6592                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6593                                 or die_error(404, "Cannot find file");
6594                 } else {
6595                         die_error(400, "No file name defined");
6596                 }
6597         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6598                 # blobs defined by non-textual hash id's can be cached
6599                 $expires = "+1d";
6600         }
6601
6602         my $have_blame = gitweb_check_feature('blame');
6603         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6604                 or die_error(500, "Couldn't cat $file_name, $hash");
6605         my $mimetype = blob_mimetype($fd, $file_name);
6606         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6607         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6608                 close $fd;
6609                 return git_blob_plain($mimetype);
6610         }
6611         # we can have blame only for text/* mimetype
6612         $have_blame &&= ($mimetype =~ m!^text/!);
6613
6614         my $highlight = gitweb_check_feature('highlight');
6615         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6616         $fd = run_highlighter($fd, $highlight, $syntax)
6617                 if $syntax;
6618
6619         git_header_html(undef, $expires);
6620         my $formats_nav = '';
6621         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6622                 if (defined $file_name) {
6623                         if ($have_blame) {
6624                                 $formats_nav .=
6625                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6626                                                 "blame") .
6627                                         " | ";
6628                         }
6629                         $formats_nav .=
6630                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6631                                         "history") .
6632                                 " | " .
6633                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6634                                         "raw") .
6635                                 " | " .
6636                                 $cgi->a({-href => href(action=>"blob",
6637                                                        hash_base=>"HEAD", file_name=>$file_name)},
6638                                         "HEAD");
6639                 } else {
6640                         $formats_nav .=
6641                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6642                                         "raw");
6643                 }
6644                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6645                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6646         } else {
6647                 print "<div class=\"page_nav\">\n" .
6648                       "<br/><br/></div>\n" .
6649                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6650         }
6651         git_print_page_path($file_name, "blob", $hash_base);
6652         print "<div class=\"page_body\">\n";
6653         if ($mimetype =~ m!^image/!) {
6654                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6655                 if ($file_name) {
6656                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6657                 }
6658                 print qq! src="! .
6659                       href(action=>"blob_plain", hash=>$hash,
6660                            hash_base=>$hash_base, file_name=>$file_name) .
6661                       qq!" />\n!;
6662         } else {
6663                 my $nr;
6664                 while (my $line = <$fd>) {
6665                         chomp $line;
6666                         $nr++;
6667                         $line = untabify($line);
6668                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6669                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6670                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6671                 }
6672         }
6673         close $fd
6674                 or print "Reading blob failed.\n";
6675         print "</div>";
6676         git_footer_html();
6677 }
6678
6679 sub git_tree {
6680         if (!defined $hash_base) {
6681                 $hash_base = "HEAD";
6682         }
6683         if (!defined $hash) {
6684                 if (defined $file_name) {
6685                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6686                 } else {
6687                         $hash = $hash_base;
6688                 }
6689         }
6690         die_error(404, "No such tree") unless defined($hash);
6691
6692         my $show_sizes = gitweb_check_feature('show-sizes');
6693         my $have_blame = gitweb_check_feature('blame');
6694
6695         my @entries = ();
6696         {
6697                 local $/ = "\0";
6698                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6699                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6700                         or die_error(500, "Open git-ls-tree failed");
6701                 @entries = map { chomp; $_ } <$fd>;
6702                 close $fd
6703                         or die_error(404, "Reading tree failed");
6704         }
6705
6706         my $refs = git_get_references();
6707         my $ref = format_ref_marker($refs, $hash_base);
6708         git_header_html();
6709         my $basedir = '';
6710         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6711                 my @views_nav = ();
6712                 if (defined $file_name) {
6713                         push @views_nav,
6714                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6715                                         "history"),
6716                                 $cgi->a({-href => href(action=>"tree",
6717                                                        hash_base=>"HEAD", file_name=>$file_name)},
6718                                         "HEAD"),
6719                 }
6720                 my $snapshot_links = format_snapshot_links($hash);
6721                 if (defined $snapshot_links) {
6722                         # FIXME: Should be available when we have no hash base as well.
6723                         push @views_nav, $snapshot_links;
6724                 }
6725                 git_print_page_nav('tree','', $hash_base, undef, undef,
6726                                    join(' | ', @views_nav));
6727                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6728         } else {
6729                 undef $hash_base;
6730                 print "<div class=\"page_nav\">\n";
6731                 print "<br/><br/></div>\n";
6732                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6733         }
6734         if (defined $file_name) {
6735                 $basedir = $file_name;
6736                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6737                         $basedir .= '/';
6738                 }
6739                 git_print_page_path($file_name, 'tree', $hash_base);
6740         }
6741         print "<div class=\"page_body\">\n";
6742         print "<table class=\"tree\">\n";
6743         my $alternate = 1;
6744         # '..' (top directory) link if possible
6745         if (defined $hash_base &&
6746             defined $file_name && $file_name =~ m![^/]+$!) {
6747                 if ($alternate) {
6748                         print "<tr class=\"dark\">\n";
6749                 } else {
6750                         print "<tr class=\"light\">\n";
6751                 }
6752                 $alternate ^= 1;
6753
6754                 my $up = $file_name;
6755                 $up =~ s!/?[^/]+$!!;
6756                 undef $up unless $up;
6757                 # based on git_print_tree_entry
6758                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6759                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6760                 print '<td class="list">';
6761                 print $cgi->a({-href => href(action=>"tree",
6762                                              hash_base=>$hash_base,
6763                                              file_name=>$up)},
6764                               "..");
6765                 print "</td>\n";
6766                 print "<td class=\"link\"></td>\n";
6767
6768                 print "</tr>\n";
6769         }
6770         foreach my $line (@entries) {
6771                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6772
6773                 if ($alternate) {
6774                         print "<tr class=\"dark\">\n";
6775                 } else {
6776                         print "<tr class=\"light\">\n";
6777                 }
6778                 $alternate ^= 1;
6779
6780                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6781
6782                 print "</tr>\n";
6783         }
6784         print "</table>\n" .
6785               "</div>";
6786         git_footer_html();
6787 }
6788
6789 sub snapshot_name {
6790         my ($project, $hash) = @_;
6791
6792         # path/to/project.git  -> project
6793         # path/to/project/.git -> project
6794         my $name = to_utf8($project);
6795         $name =~ s,([^/])/*\.git$,$1,;
6796         $name = basename($name);
6797         # sanitize name
6798         $name =~ s/[[:cntrl:]]/?/g;
6799
6800         my $ver = $hash;
6801         if ($hash =~ /^[0-9a-fA-F]+$/) {
6802                 # shorten SHA-1 hash
6803                 my $full_hash = git_get_full_hash($project, $hash);
6804                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6805                         $ver = git_get_short_hash($project, $hash);
6806                 }
6807         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6808                 # tags don't need shortened SHA-1 hash
6809                 $ver = $1;
6810         } else {
6811                 # branches and other need shortened SHA-1 hash
6812                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6813                         $ver = $1;
6814                 }
6815                 $ver .= '-' . git_get_short_hash($project, $hash);
6816         }
6817         # in case of hierarchical branch names
6818         $ver =~ s!/!.!g;
6819
6820         # name = project-version_string
6821         $name = "$name-$ver";
6822
6823         return wantarray ? ($name, $name) : $name;
6824 }
6825
6826 sub git_snapshot {
6827         my $format = $input_params{'snapshot_format'};
6828         if (!@snapshot_fmts) {
6829                 die_error(403, "Snapshots not allowed");
6830         }
6831         # default to first supported snapshot format
6832         $format ||= $snapshot_fmts[0];
6833         if ($format !~ m/^[a-z0-9]+$/) {
6834                 die_error(400, "Invalid snapshot format parameter");
6835         } elsif (!exists($known_snapshot_formats{$format})) {
6836                 die_error(400, "Unknown snapshot format");
6837         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6838                 die_error(403, "Snapshot format not allowed");
6839         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6840                 die_error(403, "Unsupported snapshot format");
6841         }
6842
6843         my $type = git_get_type("$hash^{}");
6844         if (!$type) {
6845                 die_error(404, 'Object does not exist');
6846         }  elsif ($type eq 'blob') {
6847                 die_error(400, 'Object is not a tree-ish');
6848         }
6849
6850         my ($name, $prefix) = snapshot_name($project, $hash);
6851         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6852         my $cmd = quote_command(
6853                 git_cmd(), 'archive',
6854                 "--format=$known_snapshot_formats{$format}{'format'}",
6855                 "--prefix=$prefix/", $hash);
6856         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6857                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6858         }
6859
6860         $filename =~ s/(["\\])/\\$1/g;
6861         print $cgi->header(
6862                 -type => $known_snapshot_formats{$format}{'type'},
6863                 -content_disposition => 'inline; filename="' . $filename . '"',
6864                 -status => '200 OK');
6865
6866         open my $fd, "-|", $cmd
6867                 or die_error(500, "Execute git-archive failed");
6868         binmode STDOUT, ':raw';
6869         print <$fd>;
6870         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6871         close $fd;
6872 }
6873
6874 sub git_log_generic {
6875         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6876
6877         my $head = git_get_head_hash($project);
6878         if (!defined $base) {
6879                 $base = $head;
6880         }
6881         if (!defined $page) {
6882                 $page = 0;
6883         }
6884         my $refs = git_get_references();
6885
6886         my $commit_hash = $base;
6887         if (defined $parent) {
6888                 $commit_hash = "$parent..$base";
6889         }
6890         my @commitlist =
6891                 parse_commits($commit_hash, 101, (100 * $page),
6892                               defined $file_name ? ($file_name, "--full-history") : ());
6893
6894         my $ftype;
6895         if (!defined $file_hash && defined $file_name) {
6896                 # some commits could have deleted file in question,
6897                 # and not have it in tree, but one of them has to have it
6898                 for (my $i = 0; $i < @commitlist; $i++) {
6899                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6900                         last if defined $file_hash;
6901                 }
6902         }
6903         if (defined $file_hash) {
6904                 $ftype = git_get_type($file_hash);
6905         }
6906         if (defined $file_name && !defined $ftype) {
6907                 die_error(500, "Unknown type of object");
6908         }
6909         my %co;
6910         if (defined $file_name) {
6911                 %co = parse_commit($base)
6912                         or die_error(404, "Unknown commit object");
6913         }
6914
6915
6916         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6917         my $next_link = '';
6918         if ($#commitlist >= 100) {
6919                 $next_link =
6920                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6921                                  -accesskey => "n", -title => "Alt-n"}, "next");
6922         }
6923         my $patch_max = gitweb_get_feature('patches');
6924         if ($patch_max && !defined $file_name) {
6925                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6926                         $paging_nav .= " &sdot; " .
6927                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6928                                         "patches");
6929                 }
6930         }
6931
6932         git_header_html();
6933         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6934         if (defined $file_name) {
6935                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6936         } else {
6937                 git_print_header_div('summary', $project)
6938         }
6939         git_print_page_path($file_name, $ftype, $hash_base)
6940                 if (defined $file_name);
6941
6942         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6943                      $file_name, $file_hash, $ftype);
6944
6945         git_footer_html();
6946 }
6947
6948 sub git_log {
6949         git_log_generic('log', \&git_log_body,
6950                         $hash, $hash_parent);
6951 }
6952
6953 sub git_commit {
6954         $hash ||= $hash_base || "HEAD";
6955         my %co = parse_commit($hash)
6956             or die_error(404, "Unknown commit object");
6957
6958         my $parent  = $co{'parent'};
6959         my $parents = $co{'parents'}; # listref
6960
6961         # we need to prepare $formats_nav before any parameter munging
6962         my $formats_nav;
6963         if (!defined $parent) {
6964                 # --root commitdiff
6965                 $formats_nav .= '(initial)';
6966         } elsif (@$parents == 1) {
6967                 # single parent commit
6968                 $formats_nav .=
6969                         '(parent: ' .
6970                         $cgi->a({-href => href(action=>"commit",
6971                                                hash=>$parent)},
6972                                 esc_html(substr($parent, 0, 7))) .
6973                         ')';
6974         } else {
6975                 # merge commit
6976                 $formats_nav .=
6977                         '(merge: ' .
6978                         join(' ', map {
6979                                 $cgi->a({-href => href(action=>"commit",
6980                                                        hash=>$_)},
6981                                         esc_html(substr($_, 0, 7)));
6982                         } @$parents ) .
6983                         ')';
6984         }
6985         if (gitweb_check_feature('patches') && @$parents <= 1) {
6986                 $formats_nav .= " | " .
6987                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6988                                 "patch");
6989         }
6990
6991         if (!defined $parent) {
6992                 $parent = "--root";
6993         }
6994         my @difftree;
6995         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6996                 @diff_opts,
6997                 (@$parents <= 1 ? $parent : '-c'),
6998                 $hash, "--"
6999                 or die_error(500, "Open git-diff-tree failed");
7000         @difftree = map { chomp; $_ } <$fd>;
7001         close $fd or die_error(404, "Reading git-diff-tree failed");
7002
7003         # non-textual hash id's can be cached
7004         my $expires;
7005         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7006                 $expires = "+1d";
7007         }
7008         my $refs = git_get_references();
7009         my $ref = format_ref_marker($refs, $co{'id'});
7010
7011         git_header_html(undef, $expires);
7012         git_print_page_nav('commit', '',
7013                            $hash, $co{'tree'}, $hash,
7014                            $formats_nav);
7015
7016         if (defined $co{'parent'}) {
7017                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7018         } else {
7019                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7020         }
7021         print "<div class=\"title_text\">\n" .
7022               "<table class=\"object_header\">\n";
7023         git_print_authorship_rows(\%co);
7024         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7025         print "<tr>" .
7026               "<td>tree</td>" .
7027               "<td class=\"sha1\">" .
7028               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7029                        class => "list"}, $co{'tree'}) .
7030               "</td>" .
7031               "<td class=\"link\">" .
7032               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7033                       "tree");
7034         my $snapshot_links = format_snapshot_links($hash);
7035         if (defined $snapshot_links) {
7036                 print " | " . $snapshot_links;
7037         }
7038         print "</td>" .
7039               "</tr>\n";
7040
7041         foreach my $par (@$parents) {
7042                 print "<tr>" .
7043                       "<td>parent</td>" .
7044                       "<td class=\"sha1\">" .
7045                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7046                                class => "list"}, $par) .
7047                       "</td>" .
7048                       "<td class=\"link\">" .
7049                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7050                       " | " .
7051                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7052                       "</td>" .
7053                       "</tr>\n";
7054         }
7055         print "</table>".
7056               "</div>\n";
7057
7058         print "<div class=\"page_body\">\n";
7059         git_print_log($co{'comment'});
7060         print "</div>\n";
7061
7062         git_difftree_body(\@difftree, $hash, @$parents);
7063
7064         git_footer_html();
7065 }
7066
7067 sub git_object {
7068         # object is defined by:
7069         # - hash or hash_base alone
7070         # - hash_base and file_name
7071         my $type;
7072
7073         # - hash or hash_base alone
7074         if ($hash || ($hash_base && !defined $file_name)) {
7075                 my $object_id = $hash || $hash_base;
7076
7077                 open my $fd, "-|", quote_command(
7078                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7079                         or die_error(404, "Object does not exist");
7080                 $type = <$fd>;
7081                 chomp $type;
7082                 close $fd
7083                         or die_error(404, "Object does not exist");
7084
7085         # - hash_base and file_name
7086         } elsif ($hash_base && defined $file_name) {
7087                 $file_name =~ s,/+$,,;
7088
7089                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7090                         or die_error(404, "Base object does not exist");
7091
7092                 # here errors should not hapen
7093                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7094                         or die_error(500, "Open git-ls-tree failed");
7095                 my $line = <$fd>;
7096                 close $fd;
7097
7098                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7099                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7100                         die_error(404, "File or directory for given base does not exist");
7101                 }
7102                 $type = $2;
7103                 $hash = $3;
7104         } else {
7105                 die_error(400, "Not enough information to find object");
7106         }
7107
7108         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7109                                           hash=>$hash, hash_base=>$hash_base,
7110                                           file_name=>$file_name),
7111                              -status => '302 Found');
7112 }
7113
7114 sub git_blobdiff {
7115         my $format = shift || 'html';
7116         my $diff_style = $input_params{'diff_style'} || 'inline';
7117
7118         my $fd;
7119         my @difftree;
7120         my %diffinfo;
7121         my $expires;
7122
7123         # preparing $fd and %diffinfo for git_patchset_body
7124         # new style URI
7125         if (defined $hash_base && defined $hash_parent_base) {
7126                 if (defined $file_name) {
7127                         # read raw output
7128                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7129                                 $hash_parent_base, $hash_base,
7130                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7131                                 or die_error(500, "Open git-diff-tree failed");
7132                         @difftree = map { chomp; $_ } <$fd>;
7133                         close $fd
7134                                 or die_error(404, "Reading git-diff-tree failed");
7135                         @difftree
7136                                 or die_error(404, "Blob diff not found");
7137
7138                 } elsif (defined $hash &&
7139                          $hash =~ /[0-9a-fA-F]{40}/) {
7140                         # try to find filename from $hash
7141
7142                         # read filtered raw output
7143                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7144                                 $hash_parent_base, $hash_base, "--"
7145                                 or die_error(500, "Open git-diff-tree failed");
7146                         @difftree =
7147                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7148                                 # $hash == to_id
7149                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7150                                 map { chomp; $_ } <$fd>;
7151                         close $fd
7152                                 or die_error(404, "Reading git-diff-tree failed");
7153                         @difftree
7154                                 or die_error(404, "Blob diff not found");
7155
7156                 } else {
7157                         die_error(400, "Missing one of the blob diff parameters");
7158                 }
7159
7160                 if (@difftree > 1) {
7161                         die_error(400, "Ambiguous blob diff specification");
7162                 }
7163
7164                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7165                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7166                 $file_name   ||= $diffinfo{'to_file'};
7167
7168                 $hash_parent ||= $diffinfo{'from_id'};
7169                 $hash        ||= $diffinfo{'to_id'};
7170
7171                 # non-textual hash id's can be cached
7172                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7173                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7174                         $expires = '+1d';
7175                 }
7176
7177                 # open patch output
7178                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7179                         '-p', ($format eq 'html' ? "--full-index" : ()),
7180                         $hash_parent_base, $hash_base,
7181                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7182                         or die_error(500, "Open git-diff-tree failed");
7183         }
7184
7185         # old/legacy style URI -- not generated anymore since 1.4.3.
7186         if (!%diffinfo) {
7187                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7188         }
7189
7190         # header
7191         if ($format eq 'html') {
7192                 my $formats_nav =
7193                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7194                                 "raw");
7195                 $formats_nav .= diff_style_nav($diff_style);
7196                 git_header_html(undef, $expires);
7197                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7198                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7199                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7200                 } else {
7201                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7202                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7203                 }
7204                 if (defined $file_name) {
7205                         git_print_page_path($file_name, "blob", $hash_base);
7206                 } else {
7207                         print "<div class=\"page_path\"></div>\n";
7208                 }
7209
7210         } elsif ($format eq 'plain') {
7211                 print $cgi->header(
7212                         -type => 'text/plain',
7213                         -charset => 'utf-8',
7214                         -expires => $expires,
7215                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7216
7217                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7218
7219         } else {
7220                 die_error(400, "Unknown blobdiff format");
7221         }
7222
7223         # patch
7224         if ($format eq 'html') {
7225                 print "<div class=\"page_body\">\n";
7226
7227                 git_patchset_body($fd, $diff_style,
7228                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7229                 close $fd;
7230
7231                 print "</div>\n"; # class="page_body"
7232                 git_footer_html();
7233
7234         } else {
7235                 while (my $line = <$fd>) {
7236                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7237                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7238
7239                         print $line;
7240
7241                         last if $line =~ m!^\+\+\+!;
7242                 }
7243                 local $/ = undef;
7244                 print <$fd>;
7245                 close $fd;
7246         }
7247 }
7248
7249 sub git_blobdiff_plain {
7250         git_blobdiff('plain');
7251 }
7252
7253 # assumes that it is added as later part of already existing navigation,
7254 # so it returns "| foo | bar" rather than just "foo | bar"
7255 sub diff_style_nav {
7256         my ($diff_style, $is_combined) = @_;
7257         $diff_style ||= 'inline';
7258
7259         return "" if ($is_combined);
7260
7261         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7262         my %styles = @styles;
7263         @styles =
7264                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7265
7266         return join '',
7267                 map { " | ".$_ }
7268                 map {
7269                         $_ eq $diff_style ? $styles{$_} :
7270                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7271                 } @styles;
7272 }
7273
7274 sub git_commitdiff {
7275         my %params = @_;
7276         my $format = $params{-format} || 'html';
7277         my $diff_style = $input_params{'diff_style'} || 'inline';
7278
7279         my ($patch_max) = gitweb_get_feature('patches');
7280         if ($format eq 'patch') {
7281                 die_error(403, "Patch view not allowed") unless $patch_max;
7282         }
7283
7284         $hash ||= $hash_base || "HEAD";
7285         my %co = parse_commit($hash)
7286             or die_error(404, "Unknown commit object");
7287
7288         # choose format for commitdiff for merge
7289         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7290                 $hash_parent = '--cc';
7291         }
7292         # we need to prepare $formats_nav before almost any parameter munging
7293         my $formats_nav;
7294         if ($format eq 'html') {
7295                 $formats_nav =
7296                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7297                                 "raw");
7298                 if ($patch_max && @{$co{'parents'}} <= 1) {
7299                         $formats_nav .= " | " .
7300                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7301                                         "patch");
7302                 }
7303                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7304
7305                 if (defined $hash_parent &&
7306                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7307                         # commitdiff with two commits given
7308                         my $hash_parent_short = $hash_parent;
7309                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7310                                 $hash_parent_short = substr($hash_parent, 0, 7);
7311                         }
7312                         $formats_nav .=
7313                                 ' (from';
7314                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7315                                 if ($co{'parents'}[$i] eq $hash_parent) {
7316                                         $formats_nav .= ' parent ' . ($i+1);
7317                                         last;
7318                                 }
7319                         }
7320                         $formats_nav .= ': ' .
7321                                 $cgi->a({-href => href(-replay=>1,
7322                                                        hash=>$hash_parent, hash_base=>undef)},
7323                                         esc_html($hash_parent_short)) .
7324                                 ')';
7325                 } elsif (!$co{'parent'}) {
7326                         # --root commitdiff
7327                         $formats_nav .= ' (initial)';
7328                 } elsif (scalar @{$co{'parents'}} == 1) {
7329                         # single parent commit
7330                         $formats_nav .=
7331                                 ' (parent: ' .
7332                                 $cgi->a({-href => href(-replay=>1,
7333                                                        hash=>$co{'parent'}, hash_base=>undef)},
7334                                         esc_html(substr($co{'parent'}, 0, 7))) .
7335                                 ')';
7336                 } else {
7337                         # merge commit
7338                         if ($hash_parent eq '--cc') {
7339                                 $formats_nav .= ' | ' .
7340                                         $cgi->a({-href => href(-replay=>1,
7341                                                                hash=>$hash, hash_parent=>'-c')},
7342                                                 'combined');
7343                         } else { # $hash_parent eq '-c'
7344                                 $formats_nav .= ' | ' .
7345                                         $cgi->a({-href => href(-replay=>1,
7346                                                                hash=>$hash, hash_parent=>'--cc')},
7347                                                 'compact');
7348                         }
7349                         $formats_nav .=
7350                                 ' (merge: ' .
7351                                 join(' ', map {
7352                                         $cgi->a({-href => href(-replay=>1,
7353                                                                hash=>$_, hash_base=>undef)},
7354                                                 esc_html(substr($_, 0, 7)));
7355                                 } @{$co{'parents'}} ) .
7356                                 ')';
7357                 }
7358         }
7359
7360         my $hash_parent_param = $hash_parent;
7361         if (!defined $hash_parent_param) {
7362                 # --cc for multiple parents, --root for parentless
7363                 $hash_parent_param =
7364                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7365         }
7366
7367         # read commitdiff
7368         my $fd;
7369         my @difftree;
7370         if ($format eq 'html') {
7371                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7372                         "--no-commit-id", "--patch-with-raw", "--full-index",
7373                         $hash_parent_param, $hash, "--"
7374                         or die_error(500, "Open git-diff-tree failed");
7375
7376                 while (my $line = <$fd>) {
7377                         chomp $line;
7378                         # empty line ends raw part of diff-tree output
7379                         last unless $line;
7380                         push @difftree, scalar parse_difftree_raw_line($line);
7381                 }
7382
7383         } elsif ($format eq 'plain') {
7384                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7385                         '-p', $hash_parent_param, $hash, "--"
7386                         or die_error(500, "Open git-diff-tree failed");
7387         } elsif ($format eq 'patch') {
7388                 # For commit ranges, we limit the output to the number of
7389                 # patches specified in the 'patches' feature.
7390                 # For single commits, we limit the output to a single patch,
7391                 # diverging from the git-format-patch default.
7392                 my @commit_spec = ();
7393                 if ($hash_parent) {
7394                         if ($patch_max > 0) {
7395                                 push @commit_spec, "-$patch_max";
7396                         }
7397                         push @commit_spec, '-n', "$hash_parent..$hash";
7398                 } else {
7399                         if ($params{-single}) {
7400                                 push @commit_spec, '-1';
7401                         } else {
7402                                 if ($patch_max > 0) {
7403                                         push @commit_spec, "-$patch_max";
7404                                 }
7405                                 push @commit_spec, "-n";
7406                         }
7407                         push @commit_spec, '--root', $hash;
7408                 }
7409                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7410                         '--encoding=utf8', '--stdout', @commit_spec
7411                         or die_error(500, "Open git-format-patch failed");
7412         } else {
7413                 die_error(400, "Unknown commitdiff format");
7414         }
7415
7416         # non-textual hash id's can be cached
7417         my $expires;
7418         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7419                 $expires = "+1d";
7420         }
7421
7422         # write commit message
7423         if ($format eq 'html') {
7424                 my $refs = git_get_references();
7425                 my $ref = format_ref_marker($refs, $co{'id'});
7426
7427                 git_header_html(undef, $expires);
7428                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7429                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7430                 print "<div class=\"title_text\">\n" .
7431                       "<table class=\"object_header\">\n";
7432                 git_print_authorship_rows(\%co);
7433                 print "</table>".
7434                       "</div>\n";
7435                 print "<div class=\"page_body\">\n";
7436                 if (@{$co{'comment'}} > 1) {
7437                         print "<div class=\"log\">\n";
7438                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7439                         print "</div>\n"; # class="log"
7440                 }
7441
7442         } elsif ($format eq 'plain') {
7443                 my $refs = git_get_references("tags");
7444                 my $tagname = git_get_rev_name_tags($hash);
7445                 my $filename = basename($project) . "-$hash.patch";
7446
7447                 print $cgi->header(
7448                         -type => 'text/plain',
7449                         -charset => 'utf-8',
7450                         -expires => $expires,
7451                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7452                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7453                 print "From: " . to_utf8($co{'author'}) . "\n";
7454                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7455                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7456
7457                 print "X-Git-Tag: $tagname\n" if $tagname;
7458                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7459
7460                 foreach my $line (@{$co{'comment'}}) {
7461                         print to_utf8($line) . "\n";
7462                 }
7463                 print "---\n\n";
7464         } elsif ($format eq 'patch') {
7465                 my $filename = basename($project) . "-$hash.patch";
7466
7467                 print $cgi->header(
7468                         -type => 'text/plain',
7469                         -charset => 'utf-8',
7470                         -expires => $expires,
7471                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7472         }
7473
7474         # write patch
7475         if ($format eq 'html') {
7476                 my $use_parents = !defined $hash_parent ||
7477                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7478                 git_difftree_body(\@difftree, $hash,
7479                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7480                 print "<br/>\n";
7481
7482                 git_patchset_body($fd, $diff_style,
7483                                   \@difftree, $hash,
7484                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7485                 close $fd;
7486                 print "</div>\n"; # class="page_body"
7487                 git_footer_html();
7488
7489         } elsif ($format eq 'plain') {
7490                 local $/ = undef;
7491                 print <$fd>;
7492                 close $fd
7493                         or print "Reading git-diff-tree failed\n";
7494         } elsif ($format eq 'patch') {
7495                 local $/ = undef;
7496                 print <$fd>;
7497                 close $fd
7498                         or print "Reading git-format-patch failed\n";
7499         }
7500 }
7501
7502 sub git_commitdiff_plain {
7503         git_commitdiff(-format => 'plain');
7504 }
7505
7506 # format-patch-style patches
7507 sub git_patch {
7508         git_commitdiff(-format => 'patch', -single => 1);
7509 }
7510
7511 sub git_patches {
7512         git_commitdiff(-format => 'patch');
7513 }
7514
7515 sub git_history {
7516         git_log_generic('history', \&git_history_body,
7517                         $hash_base, $hash_parent_base,
7518                         $file_name, $hash);
7519 }
7520
7521 sub git_search {
7522         $searchtype ||= 'commit';
7523
7524         # check if appropriate features are enabled
7525         gitweb_check_feature('search')
7526                 or die_error(403, "Search is disabled");
7527         if ($searchtype eq 'pickaxe') {
7528                 # pickaxe may take all resources of your box and run for several minutes
7529                 # with every query - so decide by yourself how public you make this feature
7530                 gitweb_check_feature('pickaxe')
7531                         or die_error(403, "Pickaxe search is disabled");
7532         }
7533         if ($searchtype eq 'grep') {
7534                 # grep search might be potentially CPU-intensive, too
7535                 gitweb_check_feature('grep')
7536                         or die_error(403, "Grep search is disabled");
7537         }
7538
7539         if (!defined $searchtext) {
7540                 die_error(400, "Text field is empty");
7541         }
7542         if (!defined $hash) {
7543                 $hash = git_get_head_hash($project);
7544         }
7545         my %co = parse_commit($hash);
7546         if (!%co) {
7547                 die_error(404, "Unknown commit object");
7548         }
7549         if (!defined $page) {
7550                 $page = 0;
7551         }
7552
7553         if ($searchtype eq 'commit' ||
7554             $searchtype eq 'author' ||
7555             $searchtype eq 'committer') {
7556                 git_search_message(%co);
7557         } elsif ($searchtype eq 'pickaxe') {
7558                 git_search_changes(%co);
7559         } elsif ($searchtype eq 'grep') {
7560                 git_search_files(%co);
7561         } else {
7562                 die_error(400, "Unknown search type");
7563         }
7564 }
7565
7566 sub git_search_help {
7567         git_header_html();
7568         git_print_page_nav('','', $hash,$hash,$hash);
7569         print <<EOT;
7570 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7571 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7572 the pattern entered is recognized as the POSIX extended
7573 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7574 insensitive).</p>
7575 <dl>
7576 <dt><b>commit</b></dt>
7577 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7578 EOT
7579         my $have_grep = gitweb_check_feature('grep');
7580         if ($have_grep) {
7581                 print <<EOT;
7582 <dt><b>grep</b></dt>
7583 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7584     a different one) are searched for the given pattern. On large trees, this search can take
7585 a while and put some strain on the server, so please use it with some consideration. Note that
7586 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7587 case-sensitive.</dd>
7588 EOT
7589         }
7590         print <<EOT;
7591 <dt><b>author</b></dt>
7592 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7593 <dt><b>committer</b></dt>
7594 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7595 EOT
7596         my $have_pickaxe = gitweb_check_feature('pickaxe');
7597         if ($have_pickaxe) {
7598                 print <<EOT;
7599 <dt><b>pickaxe</b></dt>
7600 <dd>All commits that caused the string to appear or disappear from any file (changes that
7601 added, removed or "modified" the string) will be listed. This search can take a while and
7602 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7603 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7604 EOT
7605         }
7606         print "</dl>\n";
7607         git_footer_html();
7608 }
7609
7610 sub git_shortlog {
7611         git_log_generic('shortlog', \&git_shortlog_body,
7612                         $hash, $hash_parent);
7613 }
7614
7615 ## ......................................................................
7616 ## feeds (RSS, Atom; OPML)
7617
7618 sub git_feed {
7619         my $format = shift || 'atom';
7620         my $have_blame = gitweb_check_feature('blame');
7621
7622         # Atom: http://www.atomenabled.org/developers/syndication/
7623         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7624         if ($format ne 'rss' && $format ne 'atom') {
7625                 die_error(400, "Unknown web feed format");
7626         }
7627
7628         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7629         my $head = $hash || 'HEAD';
7630         my @commitlist = parse_commits($head, 150, 0, $file_name);
7631
7632         my %latest_commit;
7633         my %latest_date;
7634         my $content_type = "application/$format+xml";
7635         if (defined $cgi->http('HTTP_ACCEPT') &&
7636                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7637                 # browser (feed reader) prefers text/xml
7638                 $content_type = 'text/xml';
7639         }
7640         if (defined($commitlist[0])) {
7641                 %latest_commit = %{$commitlist[0]};
7642                 my $latest_epoch = $latest_commit{'committer_epoch'};
7643                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7644                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7645                 if (defined $if_modified) {
7646                         my $since;
7647                         if (eval { require HTTP::Date; 1; }) {
7648                                 $since = HTTP::Date::str2time($if_modified);
7649                         } elsif (eval { require Time::ParseDate; 1; }) {
7650                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7651                         }
7652                         if (defined $since && $latest_epoch <= $since) {
7653                                 print $cgi->header(
7654                                         -type => $content_type,
7655                                         -charset => 'utf-8',
7656                                         -last_modified => $latest_date{'rfc2822'},
7657                                         -status => '304 Not Modified');
7658                                 return;
7659                         }
7660                 }
7661                 print $cgi->header(
7662                         -type => $content_type,
7663                         -charset => 'utf-8',
7664                         -last_modified => $latest_date{'rfc2822'});
7665         } else {
7666                 print $cgi->header(
7667                         -type => $content_type,
7668                         -charset => 'utf-8');
7669         }
7670
7671         # Optimization: skip generating the body if client asks only
7672         # for Last-Modified date.
7673         return if ($cgi->request_method() eq 'HEAD');
7674
7675         # header variables
7676         my $title = "$site_name - $project/$action";
7677         my $feed_type = 'log';
7678         if (defined $hash) {
7679                 $title .= " - '$hash'";
7680                 $feed_type = 'branch log';
7681                 if (defined $file_name) {
7682                         $title .= " :: $file_name";
7683                         $feed_type = 'history';
7684                 }
7685         } elsif (defined $file_name) {
7686                 $title .= " - $file_name";
7687                 $feed_type = 'history';
7688         }
7689         $title .= " $feed_type";
7690         my $descr = git_get_project_description($project);
7691         if (defined $descr) {
7692                 $descr = esc_html($descr);
7693         } else {
7694                 $descr = "$project " .
7695                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7696                          " feed";
7697         }
7698         my $owner = git_get_project_owner($project);
7699         $owner = esc_html($owner);
7700
7701         #header
7702         my $alt_url;
7703         if (defined $file_name) {
7704                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7705         } elsif (defined $hash) {
7706                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7707         } else {
7708                 $alt_url = href(-full=>1, action=>"summary");
7709         }
7710         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7711         if ($format eq 'rss') {
7712                 print <<XML;
7713 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7714 <channel>
7715 XML
7716                 print "<title>$title</title>\n" .
7717                       "<link>$alt_url</link>\n" .
7718                       "<description>$descr</description>\n" .
7719                       "<language>en</language>\n" .
7720                       # project owner is responsible for 'editorial' content
7721                       "<managingEditor>$owner</managingEditor>\n";
7722                 if (defined $logo || defined $favicon) {
7723                         # prefer the logo to the favicon, since RSS
7724                         # doesn't allow both
7725                         my $img = esc_url($logo || $favicon);
7726                         print "<image>\n" .
7727                               "<url>$img</url>\n" .
7728                               "<title>$title</title>\n" .
7729                               "<link>$alt_url</link>\n" .
7730                               "</image>\n";
7731                 }
7732                 if (%latest_date) {
7733                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7734                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7735                 }
7736                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7737         } elsif ($format eq 'atom') {
7738                 print <<XML;
7739 <feed xmlns="http://www.w3.org/2005/Atom">
7740 XML
7741                 print "<title>$title</title>\n" .
7742                       "<subtitle>$descr</subtitle>\n" .
7743                       '<link rel="alternate" type="text/html" href="' .
7744                       $alt_url . '" />' . "\n" .
7745                       '<link rel="self" type="' . $content_type . '" href="' .
7746                       $cgi->self_url() . '" />' . "\n" .
7747                       "<id>" . href(-full=>1) . "</id>\n" .
7748                       # use project owner for feed author
7749                       "<author><name>$owner</name></author>\n";
7750                 if (defined $favicon) {
7751                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7752                 }
7753                 if (defined $logo) {
7754                         # not twice as wide as tall: 72 x 27 pixels
7755                         print "<logo>" . esc_url($logo) . "</logo>\n";
7756                 }
7757                 if (! %latest_date) {
7758                         # dummy date to keep the feed valid until commits trickle in:
7759                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7760                 } else {
7761                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7762                 }
7763                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7764         }
7765
7766         # contents
7767         for (my $i = 0; $i <= $#commitlist; $i++) {
7768                 my %co = %{$commitlist[$i]};
7769                 my $commit = $co{'id'};
7770                 # we read 150, we always show 30 and the ones more recent than 48 hours
7771                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7772                         last;
7773                 }
7774                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7775
7776                 # get list of changed files
7777                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7778                         $co{'parent'} || "--root",
7779                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7780                         or next;
7781                 my @difftree = map { chomp; $_ } <$fd>;
7782                 close $fd
7783                         or next;
7784
7785                 # print element (entry, item)
7786                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7787                 if ($format eq 'rss') {
7788                         print "<item>\n" .
7789                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7790                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7791                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7792                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7793                               "<link>$co_url</link>\n" .
7794                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7795                               "<content:encoded>" .
7796                               "<![CDATA[\n";
7797                 } elsif ($format eq 'atom') {
7798                         print "<entry>\n" .
7799                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7800                               "<updated>$cd{'iso-8601'}</updated>\n" .
7801                               "<author>\n" .
7802                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7803                         if ($co{'author_email'}) {
7804                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7805                         }
7806                         print "</author>\n" .
7807                               # use committer for contributor
7808                               "<contributor>\n" .
7809                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7810                         if ($co{'committer_email'}) {
7811                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7812                         }
7813                         print "</contributor>\n" .
7814                               "<published>$cd{'iso-8601'}</published>\n" .
7815                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7816                               "<id>$co_url</id>\n" .
7817                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7818                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7819                 }
7820                 my $comment = $co{'comment'};
7821                 print "<pre>\n";
7822                 foreach my $line (@$comment) {
7823                         $line = esc_html($line);
7824                         print "$line\n";
7825                 }
7826                 print "</pre><ul>\n";
7827                 foreach my $difftree_line (@difftree) {
7828                         my %difftree = parse_difftree_raw_line($difftree_line);
7829                         next if !$difftree{'from_id'};
7830
7831                         my $file = $difftree{'file'} || $difftree{'to_file'};
7832
7833                         print "<li>" .
7834                               "[" .
7835                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7836                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7837                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7838                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7839                                       -title => "diff"}, 'D');
7840                         if ($have_blame) {
7841                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7842                                                              file_name=>$file, hash_base=>$commit),
7843                                               -title => "blame"}, 'B');
7844                         }
7845                         # if this is not a feed of a file history
7846                         if (!defined $file_name || $file_name ne $file) {
7847                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7848                                                              file_name=>$file, hash=>$commit),
7849                                               -title => "history"}, 'H');
7850                         }
7851                         $file = esc_path($file);
7852                         print "] ".
7853                               "$file</li>\n";
7854                 }
7855                 if ($format eq 'rss') {
7856                         print "</ul>]]>\n" .
7857                               "</content:encoded>\n" .
7858                               "</item>\n";
7859                 } elsif ($format eq 'atom') {
7860                         print "</ul>\n</div>\n" .
7861                               "</content>\n" .
7862                               "</entry>\n";
7863                 }
7864         }
7865
7866         # end of feed
7867         if ($format eq 'rss') {
7868                 print "</channel>\n</rss>\n";
7869         } elsif ($format eq 'atom') {
7870                 print "</feed>\n";
7871         }
7872 }
7873
7874 sub git_rss {
7875         git_feed('rss');
7876 }
7877
7878 sub git_atom {
7879         git_feed('atom');
7880 }
7881
7882 sub git_opml {
7883         my @list = git_get_projects_list($project_filter, $strict_export);
7884         if (!@list) {
7885                 die_error(404, "No projects found");
7886         }
7887
7888         print $cgi->header(
7889                 -type => 'text/xml',
7890                 -charset => 'utf-8',
7891                 -content_disposition => 'inline; filename="opml.xml"');
7892
7893         my $title = esc_html($site_name);
7894         my $filter = " within subdirectory ";
7895         if (defined $project_filter) {
7896                 $filter .= esc_html($project_filter);
7897         } else {
7898                 $filter = "";
7899         }
7900         print <<XML;
7901 <?xml version="1.0" encoding="utf-8"?>
7902 <opml version="1.0">
7903 <head>
7904   <title>$title OPML Export$filter</title>
7905 </head>
7906 <body>
7907 <outline text="git RSS feeds">
7908 XML
7909
7910         foreach my $pr (@list) {
7911                 my %proj = %$pr;
7912                 my $head = git_get_head_hash($proj{'path'});
7913                 if (!defined $head) {
7914                         next;
7915                 }
7916                 $git_dir = "$projectroot/$proj{'path'}";
7917                 my %co = parse_commit($head);
7918                 if (!%co) {
7919                         next;
7920                 }
7921
7922                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7923                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7924                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7925                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7926         }
7927         print <<XML;
7928 </outline>
7929 </body>
7930 </opml>
7931 XML
7932 }