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_path {
3846         my $dirprefix = undef;
3847         while (my $part = shift) {
3848                 $dirprefix .= "/" if defined $dirprefix;
3849                 $dirprefix .= $part;
3850                 print $cgi->a({-href => href(project => undef,
3851                                              project_filter => $dirprefix,
3852                                              action => "project_list")},
3853                               esc_html($part)) . " / ";
3854         }
3855 }
3856
3857 sub print_nav_breadcrumbs {
3858         my %opts = @_;
3859
3860         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3861         if (defined $project) {
3862                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3863                 if (defined $action) {
3864                         my $action_print = $action ;
3865                         if (defined $opts{-action_extra}) {
3866                                 $action_print = $cgi->a({-href => href(action=>$action)},
3867                                         $action);
3868                         }
3869                         print " / $action_print";
3870                 }
3871                 if (defined $opts{-action_extra}) {
3872                         print " / $opts{-action_extra}";
3873                 }
3874                 print "\n";
3875         } elsif (defined $project_filter) {
3876                 print_nav_breadcrumbs_path(split '/', $project_filter);
3877         }
3878 }
3879
3880 sub print_search_form {
3881         if (!defined $searchtext) {
3882                 $searchtext = "";
3883         }
3884         my $search_hash;
3885         if (defined $hash_base) {
3886                 $search_hash = $hash_base;
3887         } elsif (defined $hash) {
3888                 $search_hash = $hash;
3889         } else {
3890                 $search_hash = "HEAD";
3891         }
3892         my $action = $my_uri;
3893         my $use_pathinfo = gitweb_check_feature('pathinfo');
3894         if ($use_pathinfo) {
3895                 $action .= "/".esc_url($project);
3896         }
3897         print $cgi->startform(-method => "get", -action => $action) .
3898               "<div class=\"search\">\n" .
3899               (!$use_pathinfo &&
3900               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3901               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3902               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3903               $cgi->popup_menu(-name => 'st', -default => 'commit',
3904                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3905               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3906               " search:\n",
3907               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3908               "<span title=\"Extended regular expression\">" .
3909               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3910                              -checked => $search_use_regexp) .
3911               "</span>" .
3912               "</div>" .
3913               $cgi->end_form() . "\n";
3914 }
3915
3916 sub git_header_html {
3917         my $status = shift || "200 OK";
3918         my $expires = shift;
3919         my %opts = @_;
3920
3921         my $title = get_page_title();
3922         my $content_type = get_content_type_html();
3923         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3924                            -status=> $status, -expires => $expires)
3925                 unless ($opts{'-no_http_header'});
3926         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3927         print <<EOF;
3928 <?xml version="1.0" encoding="utf-8"?>
3929 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3930 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3931 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3932 <!-- git core binaries version $git_version -->
3933 <head>
3934 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3935 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3936 <meta name="robots" content="index, nofollow"/>
3937 <title>$title</title>
3938 EOF
3939         # the stylesheet, favicon etc urls won't work correctly with path_info
3940         # unless we set the appropriate base URL
3941         if ($ENV{'PATH_INFO'}) {
3942                 print "<base href=\"".esc_url($base_url)."\" />\n";
3943         }
3944         print_header_links($status);
3945
3946         if (defined $site_html_head_string) {
3947                 print to_utf8($site_html_head_string);
3948         }
3949
3950         print "</head>\n" .
3951               "<body>\n";
3952
3953         if (defined $site_header && -f $site_header) {
3954                 insert_file($site_header);
3955         }
3956
3957         print "<div class=\"page_header\">\n";
3958         if (defined $logo) {
3959                 print $cgi->a({-href => esc_url($logo_url),
3960                                -title => $logo_label},
3961                               $cgi->img({-src => esc_url($logo),
3962                                          -width => 72, -height => 27,
3963                                          -alt => "git",
3964                                          -class => "logo"}));
3965         }
3966         print_nav_breadcrumbs(%opts);
3967         print "</div>\n";
3968
3969         my $have_search = gitweb_check_feature('search');
3970         if (defined $project && $have_search) {
3971                 print_search_form();
3972         }
3973 }
3974
3975 sub git_footer_html {
3976         my $feed_class = 'rss_logo';
3977
3978         print "<div class=\"page_footer\">\n";
3979         if (defined $project) {
3980                 my $descr = git_get_project_description($project);
3981                 if (defined $descr) {
3982                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3983                 }
3984
3985                 my %href_params = get_feed_info();
3986                 if (!%href_params) {
3987                         $feed_class .= ' generic';
3988                 }
3989                 $href_params{'-title'} ||= 'log';
3990
3991                 foreach my $format (qw(RSS Atom)) {
3992                         $href_params{'action'} = lc($format);
3993                         print $cgi->a({-href => href(%href_params),
3994                                       -title => "$href_params{'-title'} $format feed",
3995                                       -class => $feed_class}, $format)."\n";
3996                 }
3997
3998         } else {
3999                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4000                                              project_filter => $project_filter),
4001                               -class => $feed_class}, "OPML") . " ";
4002                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4003                                              project_filter => $project_filter),
4004                               -class => $feed_class}, "TXT") . "\n";
4005         }
4006         print "</div>\n"; # class="page_footer"
4007
4008         if (defined $t0 && gitweb_check_feature('timed')) {
4009                 print "<div id=\"generating_info\">\n";
4010                 print 'This page took '.
4011                       '<span id="generating_time" class="time_span">'.
4012                       tv_interval($t0, [ gettimeofday() ]).
4013                       ' seconds </span>'.
4014                       ' and '.
4015                       '<span id="generating_cmd">'.
4016                       $number_of_git_cmds.
4017                       '</span> git commands '.
4018                       " to generate.\n";
4019                 print "</div>\n"; # class="page_footer"
4020         }
4021
4022         if (defined $site_footer && -f $site_footer) {
4023                 insert_file($site_footer);
4024         }
4025
4026         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4027         if (defined $action &&
4028             $action eq 'blame_incremental') {
4029                 print qq!<script type="text/javascript">\n!.
4030                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4031                       qq!           "!. href() .qq!");\n!.
4032                       qq!</script>\n!;
4033         } else {
4034                 my ($jstimezone, $tz_cookie, $datetime_class) =
4035                         gitweb_get_feature('javascript-timezone');
4036
4037                 print qq!<script type="text/javascript">\n!.
4038                       qq!window.onload = function () {\n!;
4039                 if (gitweb_check_feature('javascript-actions')) {
4040                         print qq!       fixLinks();\n!;
4041                 }
4042                 if ($jstimezone && $tz_cookie && $datetime_class) {
4043                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4044                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4045                 }
4046                 print qq!};\n!.
4047                       qq!</script>\n!;
4048         }
4049
4050         print "</body>\n" .
4051               "</html>";
4052 }
4053
4054 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4055 # Example: die_error(404, 'Hash not found')
4056 # By convention, use the following status codes (as defined in RFC 2616):
4057 # 400: Invalid or missing CGI parameters, or
4058 #      requested object exists but has wrong type.
4059 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4060 #      this server or project.
4061 # 404: Requested object/revision/project doesn't exist.
4062 # 500: The server isn't configured properly, or
4063 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4064 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4065 # 503: The server is currently unavailable (because it is overloaded,
4066 #      or down for maintenance).  Generally, this is a temporary state.
4067 sub die_error {
4068         my $status = shift || 500;
4069         my $error = esc_html(shift) || "Internal Server Error";
4070         my $extra = shift;
4071         my %opts = @_;
4072
4073         my %http_responses = (
4074                 400 => '400 Bad Request',
4075                 403 => '403 Forbidden',
4076                 404 => '404 Not Found',
4077                 500 => '500 Internal Server Error',
4078                 503 => '503 Service Unavailable',
4079         );
4080         git_header_html($http_responses{$status}, undef, %opts);
4081         print <<EOF;
4082 <div class="page_body">
4083 <br /><br />
4084 $status - $error
4085 <br />
4086 EOF
4087         if (defined $extra) {
4088                 print "<hr />\n" .
4089                       "$extra\n";
4090         }
4091         print "</div>\n";
4092
4093         git_footer_html();
4094         goto DONE_GITWEB
4095                 unless ($opts{'-error_handler'});
4096 }
4097
4098 ## ----------------------------------------------------------------------
4099 ## functions printing or outputting HTML: navigation
4100
4101 sub git_print_page_nav {
4102         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4103         $extra = '' if !defined $extra; # pager or formats
4104
4105         my @navs = qw(summary shortlog log commit commitdiff tree);
4106         if ($suppress) {
4107                 @navs = grep { $_ ne $suppress } @navs;
4108         }
4109
4110         my %arg = map { $_ => {action=>$_} } @navs;
4111         if (defined $head) {
4112                 for (qw(commit commitdiff)) {
4113                         $arg{$_}{'hash'} = $head;
4114                 }
4115                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4116                         for (qw(shortlog log)) {
4117                                 $arg{$_}{'hash'} = $head;
4118                         }
4119                 }
4120         }
4121
4122         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4123         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4124
4125         my @actions = gitweb_get_feature('actions');
4126         my %repl = (
4127                 '%' => '%',
4128                 'n' => $project,         # project name
4129                 'f' => $git_dir,         # project path within filesystem
4130                 'h' => $treehead || '',  # current hash ('h' parameter)
4131                 'b' => $treebase || '',  # hash base ('hb' parameter)
4132         );
4133         while (@actions) {
4134                 my ($label, $link, $pos) = splice(@actions,0,3);
4135                 # insert
4136                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4137                 # munch munch
4138                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4139                 $arg{$label}{'_href'} = $link;
4140         }
4141
4142         print "<div class=\"page_nav\">\n" .
4143                 (join " | ",
4144                  map { $_ eq $current ?
4145                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4146                  } @navs);
4147         print "<br/>\n$extra<br/>\n" .
4148               "</div>\n";
4149 }
4150
4151 # returns a submenu for the nagivation of the refs views (tags, heads,
4152 # remotes) with the current view disabled and the remotes view only
4153 # available if the feature is enabled
4154 sub format_ref_views {
4155         my ($current) = @_;
4156         my @ref_views = qw{tags heads};
4157         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4158         return join " | ", map {
4159                 $_ eq $current ? $_ :
4160                 $cgi->a({-href => href(action=>$_)}, $_)
4161         } @ref_views
4162 }
4163
4164 sub format_paging_nav {
4165         my ($action, $page, $has_next_link) = @_;
4166         my $paging_nav;
4167
4168
4169         if ($page > 0) {
4170                 $paging_nav .=
4171                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4172                         " &sdot; " .
4173                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4174                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4175         } else {
4176                 $paging_nav .= "first &sdot; prev";
4177         }
4178
4179         if ($has_next_link) {
4180                 $paging_nav .= " &sdot; " .
4181                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4182                                  -accesskey => "n", -title => "Alt-n"}, "next");
4183         } else {
4184                 $paging_nav .= " &sdot; next";
4185         }
4186
4187         return $paging_nav;
4188 }
4189
4190 ## ......................................................................
4191 ## functions printing or outputting HTML: div
4192
4193 sub git_print_header_div {
4194         my ($action, $title, $hash, $hash_base) = @_;
4195         my %args = ();
4196
4197         $args{'action'} = $action;
4198         $args{'hash'} = $hash if $hash;
4199         $args{'hash_base'} = $hash_base if $hash_base;
4200
4201         print "<div class=\"header\">\n" .
4202               $cgi->a({-href => href(%args), -class => "title"},
4203               $title ? $title : $action) .
4204               "\n</div>\n";
4205 }
4206
4207 sub format_repo_url {
4208         my ($name, $url) = @_;
4209         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4210 }
4211
4212 # Group output by placing it in a DIV element and adding a header.
4213 # Options for start_div() can be provided by passing a hash reference as the
4214 # first parameter to the function.
4215 # Options to git_print_header_div() can be provided by passing an array
4216 # reference. This must follow the options to start_div if they are present.
4217 # The content can be a scalar, which is output as-is, a scalar reference, which
4218 # is output after html escaping, an IO handle passed either as *handle or
4219 # *handle{IO}, or a function reference. In the latter case all following
4220 # parameters will be taken as argument to the content function call.
4221 sub git_print_section {
4222         my ($div_args, $header_args, $content);
4223         my $arg = shift;
4224         if (ref($arg) eq 'HASH') {
4225                 $div_args = $arg;
4226                 $arg = shift;
4227         }
4228         if (ref($arg) eq 'ARRAY') {
4229                 $header_args = $arg;
4230                 $arg = shift;
4231         }
4232         $content = $arg;
4233
4234         print $cgi->start_div($div_args);
4235         git_print_header_div(@$header_args);
4236
4237         if (ref($content) eq 'CODE') {
4238                 $content->(@_);
4239         } elsif (ref($content) eq 'SCALAR') {
4240                 print esc_html($$content);
4241         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4242                 print <$content>;
4243         } elsif (!ref($content) && defined($content)) {
4244                 print $content;
4245         }
4246
4247         print $cgi->end_div;
4248 }
4249
4250 sub format_timestamp_html {
4251         my $date = shift;
4252         my $strtime = $date->{'rfc2822'};
4253
4254         my (undef, undef, $datetime_class) =
4255                 gitweb_get_feature('javascript-timezone');
4256         if ($datetime_class) {
4257                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4258         }
4259
4260         my $localtime_format = '(%02d:%02d %s)';
4261         if ($date->{'hour_local'} < 6) {
4262                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4263         }
4264         $strtime .= ' ' .
4265                     sprintf($localtime_format,
4266                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4267
4268         return $strtime;
4269 }
4270
4271 # Outputs the author name and date in long form
4272 sub git_print_authorship {
4273         my $co = shift;
4274         my %opts = @_;
4275         my $tag = $opts{-tag} || 'div';
4276         my $author = $co->{'author_name'};
4277
4278         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4279         print "<$tag class=\"author_date\">" .
4280               format_search_author($author, "author", esc_html($author)) .
4281               " [".format_timestamp_html(\%ad)."]".
4282               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4283               "</$tag>\n";
4284 }
4285
4286 # Outputs table rows containing the full author or committer information,
4287 # in the format expected for 'commit' view (& similar).
4288 # Parameters are a commit hash reference, followed by the list of people
4289 # to output information for. If the list is empty it defaults to both
4290 # author and committer.
4291 sub git_print_authorship_rows {
4292         my $co = shift;
4293         # too bad we can't use @people = @_ || ('author', 'committer')
4294         my @people = @_;
4295         @people = ('author', 'committer') unless @people;
4296         foreach my $who (@people) {
4297                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4298                 print "<tr><td>$who</td><td>" .
4299                       format_search_author($co->{"${who}_name"}, $who,
4300                                            esc_html($co->{"${who}_name"})) . " " .
4301                       format_search_author($co->{"${who}_email"}, $who,
4302                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4303                       "</td><td rowspan=\"2\">" .
4304                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4305                       "</td></tr>\n" .
4306                       "<tr>" .
4307                       "<td></td><td>" .
4308                       format_timestamp_html(\%wd) .
4309                       "</td>" .
4310                       "</tr>\n";
4311         }
4312 }
4313
4314 sub git_print_page_path {
4315         my $name = shift;
4316         my $type = shift;
4317         my $hb = shift;
4318
4319
4320         print "<div class=\"page_path\">";
4321         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4322                       -title => 'tree root'}, to_utf8("[$project]"));
4323         print " / ";
4324         if (defined $name) {
4325                 my @dirname = split '/', $name;
4326                 my $basename = pop @dirname;
4327                 my $fullname = '';
4328
4329                 foreach my $dir (@dirname) {
4330                         $fullname .= ($fullname ? '/' : '') . $dir;
4331                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4332                                                      hash_base=>$hb),
4333                                       -title => $fullname}, esc_path($dir));
4334                         print " / ";
4335                 }
4336                 if (defined $type && $type eq 'blob') {
4337                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4338                                                      hash_base=>$hb),
4339                                       -title => $name}, esc_path($basename));
4340                 } elsif (defined $type && $type eq 'tree') {
4341                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4342                                                      hash_base=>$hb),
4343                                       -title => $name}, esc_path($basename));
4344                         print " / ";
4345                 } else {
4346                         print esc_path($basename);
4347                 }
4348         }
4349         print "<br/></div>\n";
4350 }
4351
4352 sub git_print_log {
4353         my $log = shift;
4354         my %opts = @_;
4355
4356         if ($opts{'-remove_title'}) {
4357                 # remove title, i.e. first line of log
4358                 shift @$log;
4359         }
4360         # remove leading empty lines
4361         while (defined $log->[0] && $log->[0] eq "") {
4362                 shift @$log;
4363         }
4364
4365         # print log
4366         my $signoff = 0;
4367         my $empty = 0;
4368         foreach my $line (@$log) {
4369                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4370                         $signoff = 1;
4371                         $empty = 0;
4372                         if (! $opts{'-remove_signoff'}) {
4373                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4374                                 next;
4375                         } else {
4376                                 # remove signoff lines
4377                                 next;
4378                         }
4379                 } else {
4380                         $signoff = 0;
4381                 }
4382
4383                 # print only one empty line
4384                 # do not print empty line after signoff
4385                 if ($line eq "") {
4386                         next if ($empty || $signoff);
4387                         $empty = 1;
4388                 } else {
4389                         $empty = 0;
4390                 }
4391
4392                 print format_log_line_html($line) . "<br/>\n";
4393         }
4394
4395         if ($opts{'-final_empty_line'}) {
4396                 # end with single empty line
4397                 print "<br/>\n" unless $empty;
4398         }
4399 }
4400
4401 # return link target (what link points to)
4402 sub git_get_link_target {
4403         my $hash = shift;
4404         my $link_target;
4405
4406         # read link
4407         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4408                 or return;
4409         {
4410                 local $/ = undef;
4411                 $link_target = <$fd>;
4412         }
4413         close $fd
4414                 or return;
4415
4416         return $link_target;
4417 }
4418
4419 # given link target, and the directory (basedir) the link is in,
4420 # return target of link relative to top directory (top tree);
4421 # return undef if it is not possible (including absolute links).
4422 sub normalize_link_target {
4423         my ($link_target, $basedir) = @_;
4424
4425         # absolute symlinks (beginning with '/') cannot be normalized
4426         return if (substr($link_target, 0, 1) eq '/');
4427
4428         # normalize link target to path from top (root) tree (dir)
4429         my $path;
4430         if ($basedir) {
4431                 $path = $basedir . '/' . $link_target;
4432         } else {
4433                 # we are in top (root) tree (dir)
4434                 $path = $link_target;
4435         }
4436
4437         # remove //, /./, and /../
4438         my @path_parts;
4439         foreach my $part (split('/', $path)) {
4440                 # discard '.' and ''
4441                 next if (!$part || $part eq '.');
4442                 # handle '..'
4443                 if ($part eq '..') {
4444                         if (@path_parts) {
4445                                 pop @path_parts;
4446                         } else {
4447                                 # link leads outside repository (outside top dir)
4448                                 return;
4449                         }
4450                 } else {
4451                         push @path_parts, $part;
4452                 }
4453         }
4454         $path = join('/', @path_parts);
4455
4456         return $path;
4457 }
4458
4459 # print tree entry (row of git_tree), but without encompassing <tr> element
4460 sub git_print_tree_entry {
4461         my ($t, $basedir, $hash_base, $have_blame) = @_;
4462
4463         my %base_key = ();
4464         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4465
4466         # The format of a table row is: mode list link.  Where mode is
4467         # the mode of the entry, list is the name of the entry, an href,
4468         # and link is the action links of the entry.
4469
4470         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4471         if (exists $t->{'size'}) {
4472                 print "<td class=\"size\">$t->{'size'}</td>\n";
4473         }
4474         if ($t->{'type'} eq "blob") {
4475                 print "<td class=\"list\">" .
4476                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4477                                                file_name=>"$basedir$t->{'name'}", %base_key),
4478                                 -class => "list"}, esc_path($t->{'name'}));
4479                 if (S_ISLNK(oct $t->{'mode'})) {
4480                         my $link_target = git_get_link_target($t->{'hash'});
4481                         if ($link_target) {
4482                                 my $norm_target = normalize_link_target($link_target, $basedir);
4483                                 if (defined $norm_target) {
4484                                         print " -> " .
4485                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4486                                                                      file_name=>$norm_target),
4487                                                        -title => $norm_target}, esc_path($link_target));
4488                                 } else {
4489                                         print " -> " . esc_path($link_target);
4490                                 }
4491                         }
4492                 }
4493                 print "</td>\n";
4494                 print "<td class=\"link\">";
4495                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4496                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4497                               "blob");
4498                 if ($have_blame) {
4499                         print " | " .
4500                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4501                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4502                                       "blame");
4503                 }
4504                 if (defined $hash_base) {
4505                         print " | " .
4506                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4507                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4508                                       "history");
4509                 }
4510                 print " | " .
4511                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4512                                                file_name=>"$basedir$t->{'name'}")},
4513                                 "raw");
4514                 print "</td>\n";
4515
4516         } elsif ($t->{'type'} eq "tree") {
4517                 print "<td class=\"list\">";
4518                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4519                                              file_name=>"$basedir$t->{'name'}",
4520                                              %base_key)},
4521                               esc_path($t->{'name'}));
4522                 print "</td>\n";
4523                 print "<td class=\"link\">";
4524                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4525                                              file_name=>"$basedir$t->{'name'}",
4526                                              %base_key)},
4527                               "tree");
4528                 if (defined $hash_base) {
4529                         print " | " .
4530                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4531                                                      file_name=>"$basedir$t->{'name'}")},
4532                                       "history");
4533                 }
4534                 print "</td>\n";
4535         } else {
4536                 # unknown object: we can only present history for it
4537                 # (this includes 'commit' object, i.e. submodule support)
4538                 print "<td class=\"list\">" .
4539                       esc_path($t->{'name'}) .
4540                       "</td>\n";
4541                 print "<td class=\"link\">";
4542                 if (defined $hash_base) {
4543                         print $cgi->a({-href => href(action=>"history",
4544                                                      hash_base=>$hash_base,
4545                                                      file_name=>"$basedir$t->{'name'}")},
4546                                       "history");
4547                 }
4548                 print "</td>\n";
4549         }
4550 }
4551
4552 ## ......................................................................
4553 ## functions printing large fragments of HTML
4554
4555 # get pre-image filenames for merge (combined) diff
4556 sub fill_from_file_info {
4557         my ($diff, @parents) = @_;
4558
4559         $diff->{'from_file'} = [ ];
4560         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4561         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4562                 if ($diff->{'status'}[$i] eq 'R' ||
4563                     $diff->{'status'}[$i] eq 'C') {
4564                         $diff->{'from_file'}[$i] =
4565                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4566                 }
4567         }
4568
4569         return $diff;
4570 }
4571
4572 # is current raw difftree line of file deletion
4573 sub is_deleted {
4574         my $diffinfo = shift;
4575
4576         return $diffinfo->{'to_id'} eq ('0' x 40);
4577 }
4578
4579 # does patch correspond to [previous] difftree raw line
4580 # $diffinfo  - hashref of parsed raw diff format
4581 # $patchinfo - hashref of parsed patch diff format
4582 #              (the same keys as in $diffinfo)
4583 sub is_patch_split {
4584         my ($diffinfo, $patchinfo) = @_;
4585
4586         return defined $diffinfo && defined $patchinfo
4587                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4588 }
4589
4590
4591 sub git_difftree_body {
4592         my ($difftree, $hash, @parents) = @_;
4593         my ($parent) = $parents[0];
4594         my $have_blame = gitweb_check_feature('blame');
4595         print "<div class=\"list_head\">\n";
4596         if ($#{$difftree} > 10) {
4597                 print(($#{$difftree} + 1) . " files changed:\n");
4598         }
4599         print "</div>\n";
4600
4601         print "<table class=\"" .
4602               (@parents > 1 ? "combined " : "") .
4603               "diff_tree\">\n";
4604
4605         # header only for combined diff in 'commitdiff' view
4606         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4607         if ($has_header) {
4608                 # table header
4609                 print "<thead><tr>\n" .
4610                        "<th></th><th></th>\n"; # filename, patchN link
4611                 for (my $i = 0; $i < @parents; $i++) {
4612                         my $par = $parents[$i];
4613                         print "<th>" .
4614                               $cgi->a({-href => href(action=>"commitdiff",
4615                                                      hash=>$hash, hash_parent=>$par),
4616                                        -title => 'commitdiff to parent number ' .
4617                                                   ($i+1) . ': ' . substr($par,0,7)},
4618                                       $i+1) .
4619                               "&nbsp;</th>\n";
4620                 }
4621                 print "</tr></thead>\n<tbody>\n";
4622         }
4623
4624         my $alternate = 1;
4625         my $patchno = 0;
4626         foreach my $line (@{$difftree}) {
4627                 my $diff = parsed_difftree_line($line);
4628
4629                 if ($alternate) {
4630                         print "<tr class=\"dark\">\n";
4631                 } else {
4632                         print "<tr class=\"light\">\n";
4633                 }
4634                 $alternate ^= 1;
4635
4636                 if (exists $diff->{'nparents'}) { # combined diff
4637
4638                         fill_from_file_info($diff, @parents)
4639                                 unless exists $diff->{'from_file'};
4640
4641                         if (!is_deleted($diff)) {
4642                                 # file exists in the result (child) commit
4643                                 print "<td>" .
4644                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4645                                                              file_name=>$diff->{'to_file'},
4646                                                              hash_base=>$hash),
4647                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4648                                       "</td>\n";
4649                         } else {
4650                                 print "<td>" .
4651                                       esc_path($diff->{'to_file'}) .
4652                                       "</td>\n";
4653                         }
4654
4655                         if ($action eq 'commitdiff') {
4656                                 # link to patch
4657                                 $patchno++;
4658                                 print "<td class=\"link\">" .
4659                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4660                                               "patch") .
4661                                       " | " .
4662                                       "</td>\n";
4663                         }
4664
4665                         my $has_history = 0;
4666                         my $not_deleted = 0;
4667                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4668                                 my $hash_parent = $parents[$i];
4669                                 my $from_hash = $diff->{'from_id'}[$i];
4670                                 my $from_path = $diff->{'from_file'}[$i];
4671                                 my $status = $diff->{'status'}[$i];
4672
4673                                 $has_history ||= ($status ne 'A');
4674                                 $not_deleted ||= ($status ne 'D');
4675
4676                                 if ($status eq 'A') {
4677                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4678                                 } elsif ($status eq 'D') {
4679                                         print "<td class=\"link\">" .
4680                                               $cgi->a({-href => href(action=>"blob",
4681                                                                      hash_base=>$hash,
4682                                                                      hash=>$from_hash,
4683                                                                      file_name=>$from_path)},
4684                                                       "blob" . ($i+1)) .
4685                                               " | </td>\n";
4686                                 } else {
4687                                         if ($diff->{'to_id'} eq $from_hash) {
4688                                                 print "<td class=\"link nochange\">";
4689                                         } else {
4690                                                 print "<td class=\"link\">";
4691                                         }
4692                                         print $cgi->a({-href => href(action=>"blobdiff",
4693                                                                      hash=>$diff->{'to_id'},
4694                                                                      hash_parent=>$from_hash,
4695                                                                      hash_base=>$hash,
4696                                                                      hash_parent_base=>$hash_parent,
4697                                                                      file_name=>$diff->{'to_file'},
4698                                                                      file_parent=>$from_path)},
4699                                                       "diff" . ($i+1)) .
4700                                               " | </td>\n";
4701                                 }
4702                         }
4703
4704                         print "<td class=\"link\">";
4705                         if ($not_deleted) {
4706                                 print $cgi->a({-href => href(action=>"blob",
4707                                                              hash=>$diff->{'to_id'},
4708                                                              file_name=>$diff->{'to_file'},
4709                                                              hash_base=>$hash)},
4710                                               "blob");
4711                                 print " | " if ($has_history);
4712                         }
4713                         if ($has_history) {
4714                                 print $cgi->a({-href => href(action=>"history",
4715                                                              file_name=>$diff->{'to_file'},
4716                                                              hash_base=>$hash)},
4717                                               "history");
4718                         }
4719                         print "</td>\n";
4720
4721                         print "</tr>\n";
4722                         next; # instead of 'else' clause, to avoid extra indent
4723                 }
4724                 # else ordinary diff
4725
4726                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4727                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4728                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4729                         $to_mode_oct = oct $diff->{'to_mode'};
4730                         if (S_ISREG($to_mode_oct)) { # only for regular file
4731                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4732                         }
4733                         $to_file_type = file_type($diff->{'to_mode'});
4734                 }
4735                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4736                         $from_mode_oct = oct $diff->{'from_mode'};
4737                         if (S_ISREG($from_mode_oct)) { # only for regular file
4738                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4739                         }
4740                         $from_file_type = file_type($diff->{'from_mode'});
4741                 }
4742
4743                 if ($diff->{'status'} eq "A") { # created
4744                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4745                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4746                         $mode_chng   .= "]</span>";
4747                         print "<td>";
4748                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4749                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4750                                       -class => "list"}, esc_path($diff->{'file'}));
4751                         print "</td>\n";
4752                         print "<td>$mode_chng</td>\n";
4753                         print "<td class=\"link\">";
4754                         if ($action eq 'commitdiff') {
4755                                 # link to patch
4756                                 $patchno++;
4757                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4758                                               "patch") .
4759                                       " | ";
4760                         }
4761                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4762                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4763                                       "blob");
4764                         print "</td>\n";
4765
4766                 } elsif ($diff->{'status'} eq "D") { # deleted
4767                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4768                         print "<td>";
4769                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4770                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4771                                        -class => "list"}, esc_path($diff->{'file'}));
4772                         print "</td>\n";
4773                         print "<td>$mode_chng</td>\n";
4774                         print "<td class=\"link\">";
4775                         if ($action eq 'commitdiff') {
4776                                 # link to patch
4777                                 $patchno++;
4778                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4779                                               "patch") .
4780                                       " | ";
4781                         }
4782                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4783                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4784                                       "blob") . " | ";
4785                         if ($have_blame) {
4786                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4787                                                              file_name=>$diff->{'file'})},
4788                                               "blame") . " | ";
4789                         }
4790                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4791                                                      file_name=>$diff->{'file'})},
4792                                       "history");
4793                         print "</td>\n";
4794
4795                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4796                         my $mode_chnge = "";
4797                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4798                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4799                                 if ($from_file_type ne $to_file_type) {
4800                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4801                                 }
4802                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4803                                         if ($from_mode_str && $to_mode_str) {
4804                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4805                                         } elsif ($to_mode_str) {
4806                                                 $mode_chnge .= " mode: $to_mode_str";
4807                                         }
4808                                 }
4809                                 $mode_chnge .= "]</span>\n";
4810                         }
4811                         print "<td>";
4812                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4813                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4814                                       -class => "list"}, esc_path($diff->{'file'}));
4815                         print "</td>\n";
4816                         print "<td>$mode_chnge</td>\n";
4817                         print "<td class=\"link\">";
4818                         if ($action eq 'commitdiff') {
4819                                 # link to patch
4820                                 $patchno++;
4821                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4822                                               "patch") .
4823                                       " | ";
4824                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4825                                 # "commit" view and modified file (not onlu mode changed)
4826                                 print $cgi->a({-href => href(action=>"blobdiff",
4827                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4828                                                              hash_base=>$hash, hash_parent_base=>$parent,
4829                                                              file_name=>$diff->{'file'})},
4830                                               "diff") .
4831                                       " | ";
4832                         }
4833                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4834                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4835                                        "blob") . " | ";
4836                         if ($have_blame) {
4837                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4838                                                              file_name=>$diff->{'file'})},
4839                                               "blame") . " | ";
4840                         }
4841                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4842                                                      file_name=>$diff->{'file'})},
4843                                       "history");
4844                         print "</td>\n";
4845
4846                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4847                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4848                         my $nstatus = $status_name{$diff->{'status'}};
4849                         my $mode_chng = "";
4850                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4851                                 # mode also for directories, so we cannot use $to_mode_str
4852                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4853                         }
4854                         print "<td>" .
4855                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4856                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4857                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4858                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4859                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4860                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4861                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4862                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4863                               "<td class=\"link\">";
4864                         if ($action eq 'commitdiff') {
4865                                 # link to patch
4866                                 $patchno++;
4867                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4868                                               "patch") .
4869                                       " | ";
4870                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4871                                 # "commit" view and modified file (not only pure rename or copy)
4872                                 print $cgi->a({-href => href(action=>"blobdiff",
4873                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4874                                                              hash_base=>$hash, hash_parent_base=>$parent,
4875                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4876                                               "diff") .
4877                                       " | ";
4878                         }
4879                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4880                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4881                                       "blob") . " | ";
4882                         if ($have_blame) {
4883                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4884                                                              file_name=>$diff->{'to_file'})},
4885                                               "blame") . " | ";
4886                         }
4887                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4888                                                     file_name=>$diff->{'to_file'})},
4889                                       "history");
4890                         print "</td>\n";
4891
4892                 } # we should not encounter Unmerged (U) or Unknown (X) status
4893                 print "</tr>\n";
4894         }
4895         print "</tbody>" if $has_header;
4896         print "</table>\n";
4897 }
4898
4899 sub print_sidebyside_diff_chunk {
4900         my @chunk = @_;
4901         my (@ctx, @rem, @add);
4902
4903         return unless @chunk;
4904
4905         # incomplete last line might be among removed or added lines,
4906         # or both, or among context lines: find which
4907         for (my $i = 1; $i < @chunk; $i++) {
4908                 if ($chunk[$i][0] eq 'incomplete') {
4909                         $chunk[$i][0] = $chunk[$i-1][0];
4910                 }
4911         }
4912
4913         # guardian
4914         push @chunk, ["", ""];
4915
4916         foreach my $line_info (@chunk) {
4917                 my ($class, $line) = @$line_info;
4918
4919                 # print chunk headers
4920                 if ($class && $class eq 'chunk_header') {
4921                         print $line;
4922                         next;
4923                 }
4924
4925                 ## print from accumulator when type of class of lines change
4926                 # empty contents block on start rem/add block, or end of chunk
4927                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4928                         print join '',
4929                                 '<div class="chunk_block ctx">',
4930                                         '<div class="old">',
4931                                         @ctx,
4932                                         '</div>',
4933                                         '<div class="new">',
4934                                         @ctx,
4935                                         '</div>',
4936                                 '</div>';
4937                         @ctx = ();
4938                 }
4939                 # empty add/rem block on start context block, or end of chunk
4940                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4941                         if (!@add) {
4942                                 # pure removal
4943                                 print join '',
4944                                         '<div class="chunk_block rem">',
4945                                                 '<div class="old">',
4946                                                 @rem,
4947                                                 '</div>',
4948                                         '</div>';
4949                         } elsif (!@rem) {
4950                                 # pure addition
4951                                 print join '',
4952                                         '<div class="chunk_block add">',
4953                                                 '<div class="new">',
4954                                                 @add,
4955                                                 '</div>',
4956                                         '</div>';
4957                         } else {
4958                                 # assume that it is change
4959                                 print join '',
4960                                         '<div class="chunk_block chg">',
4961                                                 '<div class="old">',
4962                                                 @rem,
4963                                                 '</div>',
4964                                                 '<div class="new">',
4965                                                 @add,
4966                                                 '</div>',
4967                                         '</div>';
4968                         }
4969                         @rem = @add = ();
4970                 }
4971
4972                 ## adding lines to accumulator
4973                 # guardian value
4974                 last unless $line;
4975                 # rem, add or change
4976                 if ($class eq 'rem') {
4977                         push @rem, $line;
4978                 } elsif ($class eq 'add') {
4979                         push @add, $line;
4980                 }
4981                 # context line
4982                 if ($class eq 'ctx') {
4983                         push @ctx, $line;
4984                 }
4985         }
4986 }
4987
4988 sub git_patchset_body {
4989         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4990         my ($hash_parent) = $hash_parents[0];
4991
4992         my $is_combined = (@hash_parents > 1);
4993         my $patch_idx = 0;
4994         my $patch_number = 0;
4995         my $patch_line;
4996         my $diffinfo;
4997         my $to_name;
4998         my (%from, %to);
4999         my @chunk; # for side-by-side diff
5000
5001         print "<div class=\"patchset\">\n";
5002
5003         # skip to first patch
5004         while ($patch_line = <$fd>) {
5005                 chomp $patch_line;
5006
5007                 last if ($patch_line =~ m/^diff /);
5008         }
5009
5010  PATCH:
5011         while ($patch_line) {
5012
5013                 # parse "git diff" header line
5014                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5015                         # $1 is from_name, which we do not use
5016                         $to_name = unquote($2);
5017                         $to_name =~ s!^b/!!;
5018                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5019                         # $1 is 'cc' or 'combined', which we do not use
5020                         $to_name = unquote($2);
5021                 } else {
5022                         $to_name = undef;
5023                 }
5024
5025                 # check if current patch belong to current raw line
5026                 # and parse raw git-diff line if needed
5027                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5028                         # this is continuation of a split patch
5029                         print "<div class=\"patch cont\">\n";
5030                 } else {
5031                         # advance raw git-diff output if needed
5032                         $patch_idx++ if defined $diffinfo;
5033
5034                         # read and prepare patch information
5035                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5036
5037                         # compact combined diff output can have some patches skipped
5038                         # find which patch (using pathname of result) we are at now;
5039                         if ($is_combined) {
5040                                 while ($to_name ne $diffinfo->{'to_file'}) {
5041                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5042                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5043                                               "</div>\n";  # class="patch"
5044
5045                                         $patch_idx++;
5046                                         $patch_number++;
5047
5048                                         last if $patch_idx > $#$difftree;
5049                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5050                                 }
5051                         }
5052
5053                         # modifies %from, %to hashes
5054                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5055
5056                         # this is first patch for raw difftree line with $patch_idx index
5057                         # we index @$difftree array from 0, but number patches from 1
5058                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5059                 }
5060
5061                 # git diff header
5062                 #assert($patch_line =~ m/^diff /) if DEBUG;
5063                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5064                 $patch_number++;
5065                 # print "git diff" header
5066                 print format_git_diff_header_line($patch_line, $diffinfo,
5067                                                   \%from, \%to);
5068
5069                 # print extended diff header
5070                 print "<div class=\"diff extended_header\">\n";
5071         EXTENDED_HEADER:
5072                 while ($patch_line = <$fd>) {
5073                         chomp $patch_line;
5074
5075                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5076
5077                         print format_extended_diff_header_line($patch_line, $diffinfo,
5078                                                                \%from, \%to);
5079                 }
5080                 print "</div>\n"; # class="diff extended_header"
5081
5082                 # from-file/to-file diff header
5083                 if (! $patch_line) {
5084                         print "</div>\n"; # class="patch"
5085                         last PATCH;
5086                 }
5087                 next PATCH if ($patch_line =~ m/^diff /);
5088                 #assert($patch_line =~ m/^---/) if DEBUG;
5089
5090                 my $last_patch_line = $patch_line;
5091                 $patch_line = <$fd>;
5092                 chomp $patch_line;
5093                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5094
5095                 print format_diff_from_to_header($last_patch_line, $patch_line,
5096                                                  $diffinfo, \%from, \%to,
5097                                                  @hash_parents);
5098
5099                 # the patch itself
5100         LINE:
5101                 while ($patch_line = <$fd>) {
5102                         chomp $patch_line;
5103
5104                         next PATCH if ($patch_line =~ m/^diff /);
5105
5106                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5107                         my $diff_classes = "diff";
5108                         $diff_classes .= " $class" if ($class);
5109                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5110
5111                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5112                                 if ($class eq 'chunk_header') {
5113                                         print_sidebyside_diff_chunk(@chunk);
5114                                         @chunk = ( [ $class, $line ] );
5115                                 } else {
5116                                         push @chunk, [ $class, $line ];
5117                                 }
5118                         } else {
5119                                 # default 'inline' style and unknown styles
5120                                 print $line;
5121                         }
5122                 }
5123
5124         } continue {
5125                 if (@chunk) {
5126                         print_sidebyside_diff_chunk(@chunk);
5127                         @chunk = ();
5128                 }
5129                 print "</div>\n"; # class="patch"
5130         }
5131
5132         # for compact combined (--cc) format, with chunk and patch simplification
5133         # the patchset might be empty, but there might be unprocessed raw lines
5134         for (++$patch_idx if $patch_number > 0;
5135              $patch_idx < @$difftree;
5136              ++$patch_idx) {
5137                 # read and prepare patch information
5138                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5139
5140                 # generate anchor for "patch" links in difftree / whatchanged part
5141                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5142                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5143                       "</div>\n";  # class="patch"
5144
5145                 $patch_number++;
5146         }
5147
5148         if ($patch_number == 0) {
5149                 if (@hash_parents > 1) {
5150                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5151                 } else {
5152                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5153                 }
5154         }
5155
5156         print "</div>\n"; # class="patchset"
5157 }
5158
5159 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5160
5161 # fills project list info (age, description, owner, category, forks)
5162 # for each project in the list, removing invalid projects from
5163 # returned list
5164 # NOTE: modifies $projlist, but does not remove entries from it
5165 sub fill_project_list_info {
5166         my $projlist = shift;
5167         my @projects;
5168
5169         my $show_ctags = gitweb_check_feature('ctags');
5170  PROJECT:
5171         foreach my $pr (@$projlist) {
5172                 my (@activity) = git_get_last_activity($pr->{'path'});
5173                 unless (@activity) {
5174                         next PROJECT;
5175                 }
5176                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5177                 if (!defined $pr->{'descr'}) {
5178                         my $descr = git_get_project_description($pr->{'path'}) || "";
5179                         $descr = to_utf8($descr);
5180                         $pr->{'descr_long'} = $descr;
5181                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5182                 }
5183                 if (!defined $pr->{'owner'}) {
5184                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5185                 }
5186                 if ($show_ctags) {
5187                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5188                 }
5189                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5190                         my $cat = git_get_project_category($pr->{'path'}) ||
5191                                                            $project_list_default_category;
5192                         $pr->{'category'} = to_utf8($cat);
5193                 }
5194
5195                 push @projects, $pr;
5196         }
5197
5198         return @projects;
5199 }
5200
5201 sub sort_projects_list {
5202         my ($projlist, $order) = @_;
5203         my @projects;
5204
5205         my %order_info = (
5206                 project => { key => 'path', type => 'str' },
5207                 descr => { key => 'descr_long', type => 'str' },
5208                 owner => { key => 'owner', type => 'str' },
5209                 age => { key => 'age', type => 'num' }
5210         );
5211         my $oi = $order_info{$order};
5212         return @$projlist unless defined $oi;
5213         if ($oi->{'type'} eq 'str') {
5214                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5215         } else {
5216                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5217         }
5218
5219         return @projects;
5220 }
5221
5222 # returns a hash of categories, containing the list of project
5223 # belonging to each category
5224 sub build_projlist_by_category {
5225         my ($projlist, $from, $to) = @_;
5226         my %categories;
5227
5228         $from = 0 unless defined $from;
5229         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5230
5231         for (my $i = $from; $i <= $to; $i++) {
5232                 my $pr = $projlist->[$i];
5233                 push @{$categories{ $pr->{'category'} }}, $pr;
5234         }
5235
5236         return wantarray ? %categories : \%categories;
5237 }
5238
5239 # print 'sort by' <th> element, generating 'sort by $name' replay link
5240 # if that order is not selected
5241 sub print_sort_th {
5242         print format_sort_th(@_);
5243 }
5244
5245 sub format_sort_th {
5246         my ($name, $order, $header) = @_;
5247         my $sort_th = "";
5248         $header ||= ucfirst($name);
5249
5250         if ($order eq $name) {
5251                 $sort_th .= "<th>$header</th>\n";
5252         } else {
5253                 $sort_th .= "<th>" .
5254                             $cgi->a({-href => href(-replay=>1, order=>$name),
5255                                      -class => "header"}, $header) .
5256                             "</th>\n";
5257         }
5258
5259         return $sort_th;
5260 }
5261
5262 sub git_project_list_rows {
5263         my ($projlist, $from, $to, $check_forks) = @_;
5264
5265         $from = 0 unless defined $from;
5266         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5267
5268         my $alternate = 1;
5269         for (my $i = $from; $i <= $to; $i++) {
5270                 my $pr = $projlist->[$i];
5271
5272                 if ($alternate) {
5273                         print "<tr class=\"dark\">\n";
5274                 } else {
5275                         print "<tr class=\"light\">\n";
5276                 }
5277                 $alternate ^= 1;
5278
5279                 if ($check_forks) {
5280                         print "<td>";
5281                         if ($pr->{'forks'}) {
5282                                 my $nforks = scalar @{$pr->{'forks'}};
5283                                 if ($nforks > 0) {
5284                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5285                                                        -title => "$nforks forks"}, "+");
5286                                 } else {
5287                                         print $cgi->span({-title => "$nforks forks"}, "+");
5288                                 }
5289                         }
5290                         print "</td>\n";
5291                 }
5292                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5293                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5294                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5295                                         -class => "list", -title => $pr->{'descr_long'}},
5296                                         esc_html($pr->{'descr'})) . "</td>\n" .
5297                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5298                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5299                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5300                       "<td class=\"link\">" .
5301                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5302                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5303                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5304                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5305                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5306                       "</td>\n" .
5307                       "</tr>\n";
5308         }
5309 }
5310
5311 sub git_project_list_body {
5312         # actually uses global variable $project
5313         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5314         my @projects = @$projlist;
5315
5316         my $check_forks = gitweb_check_feature('forks');
5317         my $show_ctags  = gitweb_check_feature('ctags');
5318         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5319         $check_forks = undef
5320                 if ($tagfilter || $searchtext);
5321
5322         # filtering out forks before filling info allows to do less work
5323         @projects = filter_forks_from_projects_list(\@projects)
5324                 if ($check_forks);
5325         @projects = fill_project_list_info(\@projects);
5326         # searching projects require filling to be run before it
5327         @projects = search_projects_list(\@projects,
5328                                          'searchtext' => $searchtext,
5329                                          'tagfilter'  => $tagfilter)
5330                 if ($tagfilter || $searchtext);
5331
5332         $order ||= $default_projects_order;
5333         $from = 0 unless defined $from;
5334         $to = $#projects if (!defined $to || $#projects < $to);
5335
5336         # short circuit
5337         if ($from > $to) {
5338                 print "<center>\n".
5339                       "<b>No such projects found</b><br />\n".
5340                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5341                       "</center>\n<br />\n";
5342                 return;
5343         }
5344
5345         @projects = sort_projects_list(\@projects, $order);
5346
5347         if ($show_ctags) {
5348                 my $ctags = git_gather_all_ctags(\@projects);
5349                 my $cloud = git_populate_project_tagcloud($ctags);
5350                 print git_show_project_tagcloud($cloud, 64);
5351         }
5352
5353         print "<table class=\"project_list\">\n";
5354         unless ($no_header) {
5355                 print "<tr>\n";
5356                 if ($check_forks) {
5357                         print "<th></th>\n";
5358                 }
5359                 print_sort_th('project', $order, 'Project');
5360                 print_sort_th('descr', $order, 'Description');
5361                 print_sort_th('owner', $order, 'Owner');
5362                 print_sort_th('age', $order, 'Last Change');
5363                 print "<th></th>\n" . # for links
5364                       "</tr>\n";
5365         }
5366
5367         if ($projects_list_group_categories) {
5368                 # only display categories with projects in the $from-$to window
5369                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5370                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5371                 foreach my $cat (sort keys %categories) {
5372                         unless ($cat eq "") {
5373                                 print "<tr>\n";
5374                                 if ($check_forks) {
5375                                         print "<td></td>\n";
5376                                 }
5377                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5378                                 print "</tr>\n";
5379                         }
5380
5381                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5382                 }
5383         } else {
5384                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5385         }
5386
5387         if (defined $extra) {
5388                 print "<tr>\n";
5389                 if ($check_forks) {
5390                         print "<td></td>\n";
5391                 }
5392                 print "<td colspan=\"5\">$extra</td>\n" .
5393                       "</tr>\n";
5394         }
5395         print "</table>\n";
5396 }
5397
5398 sub git_log_body {
5399         # uses global variable $project
5400         my ($commitlist, $from, $to, $refs, $extra) = @_;
5401
5402         $from = 0 unless defined $from;
5403         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5404
5405         for (my $i = 0; $i <= $to; $i++) {
5406                 my %co = %{$commitlist->[$i]};
5407                 next if !%co;
5408                 my $commit = $co{'id'};
5409                 my $ref = format_ref_marker($refs, $commit);
5410                 git_print_header_div('commit',
5411                                "<span class=\"age\">$co{'age_string'}</span>" .
5412                                esc_html($co{'title'}) . $ref,
5413                                $commit);
5414                 print "<div class=\"title_text\">\n" .
5415                       "<div class=\"log_link\">\n" .
5416                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5417                       " | " .
5418                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5419                       " | " .
5420                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5421                       "<br/>\n" .
5422                       "</div>\n";
5423                       git_print_authorship(\%co, -tag => 'span');
5424                       print "<br/>\n</div>\n";
5425
5426                 print "<div class=\"log_body\">\n";
5427                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5428                 print "</div>\n";
5429         }
5430         if ($extra) {
5431                 print "<div class=\"page_nav\">\n";
5432                 print "$extra\n";
5433                 print "</div>\n";
5434         }
5435 }
5436
5437 sub git_shortlog_body {
5438         # uses global variable $project
5439         my ($commitlist, $from, $to, $refs, $extra) = @_;
5440
5441         $from = 0 unless defined $from;
5442         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5443
5444         print "<table class=\"shortlog\">\n";
5445         my $alternate = 1;
5446         for (my $i = $from; $i <= $to; $i++) {
5447                 my %co = %{$commitlist->[$i]};
5448                 my $commit = $co{'id'};
5449                 my $ref = format_ref_marker($refs, $commit);
5450                 if ($alternate) {
5451                         print "<tr class=\"dark\">\n";
5452                 } else {
5453                         print "<tr class=\"light\">\n";
5454                 }
5455                 $alternate ^= 1;
5456                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5457                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5458                       format_author_html('td', \%co, 10) . "<td>";
5459                 print format_subject_html($co{'title'}, $co{'title_short'},
5460                                           href(action=>"commit", hash=>$commit), $ref);
5461                 print "</td>\n" .
5462                       "<td class=\"link\">" .
5463                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5464                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5465                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5466                 my $snapshot_links = format_snapshot_links($commit);
5467                 if (defined $snapshot_links) {
5468                         print " | " . $snapshot_links;
5469                 }
5470                 print "</td>\n" .
5471                       "</tr>\n";
5472         }
5473         if (defined $extra) {
5474                 print "<tr>\n" .
5475                       "<td colspan=\"4\">$extra</td>\n" .
5476                       "</tr>\n";
5477         }
5478         print "</table>\n";
5479 }
5480
5481 sub git_history_body {
5482         # Warning: assumes constant type (blob or tree) during history
5483         my ($commitlist, $from, $to, $refs, $extra,
5484             $file_name, $file_hash, $ftype) = @_;
5485
5486         $from = 0 unless defined $from;
5487         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5488
5489         print "<table class=\"history\">\n";
5490         my $alternate = 1;
5491         for (my $i = $from; $i <= $to; $i++) {
5492                 my %co = %{$commitlist->[$i]};
5493                 if (!%co) {
5494                         next;
5495                 }
5496                 my $commit = $co{'id'};
5497
5498                 my $ref = format_ref_marker($refs, $commit);
5499
5500                 if ($alternate) {
5501                         print "<tr class=\"dark\">\n";
5502                 } else {
5503                         print "<tr class=\"light\">\n";
5504                 }
5505                 $alternate ^= 1;
5506                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5507         # shortlog:   format_author_html('td', \%co, 10)
5508                       format_author_html('td', \%co, 15, 3) . "<td>";
5509                 # originally git_history used chop_str($co{'title'}, 50)
5510                 print format_subject_html($co{'title'}, $co{'title_short'},
5511                                           href(action=>"commit", hash=>$commit), $ref);
5512                 print "</td>\n" .
5513                       "<td class=\"link\">" .
5514                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5516
5517                 if ($ftype eq 'blob') {
5518                         my $blob_current = $file_hash;
5519                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5520                         if (defined $blob_current && defined $blob_parent &&
5521                                         $blob_current ne $blob_parent) {
5522                                 print " | " .
5523                                         $cgi->a({-href => href(action=>"blobdiff",
5524                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5525                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5526                                                                file_name=>$file_name)},
5527                                                 "diff to current");
5528                         }
5529                 }
5530                 print "</td>\n" .
5531                       "</tr>\n";
5532         }
5533         if (defined $extra) {
5534                 print "<tr>\n" .
5535                       "<td colspan=\"4\">$extra</td>\n" .
5536                       "</tr>\n";
5537         }
5538         print "</table>\n";
5539 }
5540
5541 sub git_tags_body {
5542         # uses global variable $project
5543         my ($taglist, $from, $to, $extra) = @_;
5544         $from = 0 unless defined $from;
5545         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5546
5547         print "<table class=\"tags\">\n";
5548         my $alternate = 1;
5549         for (my $i = $from; $i <= $to; $i++) {
5550                 my $entry = $taglist->[$i];
5551                 my %tag = %$entry;
5552                 my $comment = $tag{'subject'};
5553                 my $comment_short;
5554                 if (defined $comment) {
5555                         $comment_short = chop_str($comment, 30, 5);
5556                 }
5557                 if ($alternate) {
5558                         print "<tr class=\"dark\">\n";
5559                 } else {
5560                         print "<tr class=\"light\">\n";
5561                 }
5562                 $alternate ^= 1;
5563                 if (defined $tag{'age'}) {
5564                         print "<td><i>$tag{'age'}</i></td>\n";
5565                 } else {
5566                         print "<td></td>\n";
5567                 }
5568                 print "<td>" .
5569                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5570                                -class => "list name"}, esc_html($tag{'name'})) .
5571                       "</td>\n" .
5572                       "<td>";
5573                 if (defined $comment) {
5574                         print format_subject_html($comment, $comment_short,
5575                                                   href(action=>"tag", hash=>$tag{'id'}));
5576                 }
5577                 print "</td>\n" .
5578                       "<td class=\"selflink\">";
5579                 if ($tag{'type'} eq "tag") {
5580                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5581                 } else {
5582                         print "&nbsp;";
5583                 }
5584                 print "</td>\n" .
5585                       "<td class=\"link\">" . " | " .
5586                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5587                 if ($tag{'reftype'} eq "commit") {
5588                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5589                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5590                 } elsif ($tag{'reftype'} eq "blob") {
5591                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5592                 }
5593                 print "</td>\n" .
5594                       "</tr>";
5595         }
5596         if (defined $extra) {
5597                 print "<tr>\n" .
5598                       "<td colspan=\"5\">$extra</td>\n" .
5599                       "</tr>\n";
5600         }
5601         print "</table>\n";
5602 }
5603
5604 sub git_heads_body {
5605         # uses global variable $project
5606         my ($headlist, $head, $from, $to, $extra) = @_;
5607         $from = 0 unless defined $from;
5608         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5609
5610         print "<table class=\"heads\">\n";
5611         my $alternate = 1;
5612         for (my $i = $from; $i <= $to; $i++) {
5613                 my $entry = $headlist->[$i];
5614                 my %ref = %$entry;
5615                 my $curr = $ref{'id'} eq $head;
5616                 if ($alternate) {
5617                         print "<tr class=\"dark\">\n";
5618                 } else {
5619                         print "<tr class=\"light\">\n";
5620                 }
5621                 $alternate ^= 1;
5622                 print "<td><i>$ref{'age'}</i></td>\n" .
5623                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5624                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5625                                -class => "list name"},esc_html($ref{'name'})) .
5626                       "</td>\n" .
5627                       "<td class=\"link\">" .
5628                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5629                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5630                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5631                       "</td>\n" .
5632                       "</tr>";
5633         }
5634         if (defined $extra) {
5635                 print "<tr>\n" .
5636                       "<td colspan=\"3\">$extra</td>\n" .
5637                       "</tr>\n";
5638         }
5639         print "</table>\n";
5640 }
5641
5642 # Display a single remote block
5643 sub git_remote_block {
5644         my ($remote, $rdata, $limit, $head) = @_;
5645
5646         my $heads = $rdata->{'heads'};
5647         my $fetch = $rdata->{'fetch'};
5648         my $push = $rdata->{'push'};
5649
5650         my $urls_table = "<table class=\"projects_list\">\n" ;
5651
5652         if (defined $fetch) {
5653                 if ($fetch eq $push) {
5654                         $urls_table .= format_repo_url("URL", $fetch);
5655                 } else {
5656                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5657                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5658                 }
5659         } elsif (defined $push) {
5660                 $urls_table .= format_repo_url("Push URL", $push);
5661         } else {
5662                 $urls_table .= format_repo_url("", "No remote URL");
5663         }
5664
5665         $urls_table .= "</table>\n";
5666
5667         my $dots;
5668         if (defined $limit && $limit < @$heads) {
5669                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5670         }
5671
5672         print $urls_table;
5673         git_heads_body($heads, $head, 0, $limit, $dots);
5674 }
5675
5676 # Display a list of remote names with the respective fetch and push URLs
5677 sub git_remotes_list {
5678         my ($remotedata, $limit) = @_;
5679         print "<table class=\"heads\">\n";
5680         my $alternate = 1;
5681         my @remotes = sort keys %$remotedata;
5682
5683         my $limited = $limit && $limit < @remotes;
5684
5685         $#remotes = $limit - 1 if $limited;
5686
5687         while (my $remote = shift @remotes) {
5688                 my $rdata = $remotedata->{$remote};
5689                 my $fetch = $rdata->{'fetch'};
5690                 my $push = $rdata->{'push'};
5691                 if ($alternate) {
5692                         print "<tr class=\"dark\">\n";
5693                 } else {
5694                         print "<tr class=\"light\">\n";
5695                 }
5696                 $alternate ^= 1;
5697                 print "<td>" .
5698                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5699                                -class=> "list name"},esc_html($remote)) .
5700                       "</td>";
5701                 print "<td class=\"link\">" .
5702                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5703                       " | " .
5704                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5705                       "</td>";
5706
5707                 print "</tr>\n";
5708         }
5709
5710         if ($limited) {
5711                 print "<tr>\n" .
5712                       "<td colspan=\"3\">" .
5713                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5714                       "</td>\n" . "</tr>\n";
5715         }
5716
5717         print "</table>";
5718 }
5719
5720 # Display remote heads grouped by remote, unless there are too many
5721 # remotes, in which case we only display the remote names
5722 sub git_remotes_body {
5723         my ($remotedata, $limit, $head) = @_;
5724         if ($limit and $limit < keys %$remotedata) {
5725                 git_remotes_list($remotedata, $limit);
5726         } else {
5727                 fill_remote_heads($remotedata);
5728                 while (my ($remote, $rdata) = each %$remotedata) {
5729                         git_print_section({-class=>"remote", -id=>$remote},
5730                                 ["remotes", $remote, $remote], sub {
5731                                         git_remote_block($remote, $rdata, $limit, $head);
5732                                 });
5733                 }
5734         }
5735 }
5736
5737 sub git_search_message {
5738         my %co = @_;
5739
5740         my $greptype;
5741         if ($searchtype eq 'commit') {
5742                 $greptype = "--grep=";
5743         } elsif ($searchtype eq 'author') {
5744                 $greptype = "--author=";
5745         } elsif ($searchtype eq 'committer') {
5746                 $greptype = "--committer=";
5747         }
5748         $greptype .= $searchtext;
5749         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5750                                        $greptype, '--regexp-ignore-case',
5751                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5752
5753         my $paging_nav = '';
5754         if ($page > 0) {
5755                 $paging_nav .=
5756                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5757                                 "first") .
5758                         " &sdot; " .
5759                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5760                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5761         } else {
5762                 $paging_nav .= "first &sdot; prev";
5763         }
5764         my $next_link = '';
5765         if ($#commitlist >= 100) {
5766                 $next_link =
5767                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5768                                  -accesskey => "n", -title => "Alt-n"}, "next");
5769                 $paging_nav .= " &sdot; $next_link";
5770         } else {
5771                 $paging_nav .= " &sdot; next";
5772         }
5773
5774         git_header_html();
5775
5776         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5777         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5778         if ($page == 0 && !@commitlist) {
5779                 print "<p>No match.</p>\n";
5780         } else {
5781                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5782         }
5783
5784         git_footer_html();
5785 }
5786
5787 sub git_search_changes {
5788         my %co = @_;
5789
5790         local $/ = "\n";
5791         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5792                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5793                 ($search_use_regexp ? '--pickaxe-regex' : ())
5794                         or die_error(500, "Open git-log failed");
5795
5796         git_header_html();
5797
5798         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5799         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5800
5801         print "<table class=\"pickaxe search\">\n";
5802         my $alternate = 1;
5803         undef %co;
5804         my @files;
5805         while (my $line = <$fd>) {
5806                 chomp $line;
5807                 next unless $line;
5808
5809                 my %set = parse_difftree_raw_line($line);
5810                 if (defined $set{'commit'}) {
5811                         # finish previous commit
5812                         if (%co) {
5813                                 print "</td>\n" .
5814                                       "<td class=\"link\">" .
5815                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5816                                               "commit") .
5817                                       " | " .
5818                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5819                                                              hash_base=>$co{'id'})},
5820                                               "tree") .
5821                                       "</td>\n" .
5822                                       "</tr>\n";
5823                         }
5824
5825                         if ($alternate) {
5826                                 print "<tr class=\"dark\">\n";
5827                         } else {
5828                                 print "<tr class=\"light\">\n";
5829                         }
5830                         $alternate ^= 1;
5831                         %co = parse_commit($set{'commit'});
5832                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5833                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5834                               "<td><i>$author</i></td>\n" .
5835                               "<td>" .
5836                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5837                                       -class => "list subject"},
5838                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5839                 } elsif (defined $set{'to_id'}) {
5840                         next if ($set{'to_id'} =~ m/^0{40}$/);
5841
5842                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5843                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5844                                       -class => "list"},
5845                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5846                               "<br/>\n";
5847                 }
5848         }
5849         close $fd;
5850
5851         # finish last commit (warning: repetition!)
5852         if (%co) {
5853                 print "</td>\n" .
5854                       "<td class=\"link\">" .
5855                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5856                               "commit") .
5857                       " | " .
5858                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5859                                              hash_base=>$co{'id'})},
5860                               "tree") .
5861                       "</td>\n" .
5862                       "</tr>\n";
5863         }
5864
5865         print "</table>\n";
5866
5867         git_footer_html();
5868 }
5869
5870 sub git_search_files {
5871         my %co = @_;
5872
5873         local $/ = "\n";
5874         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5875                 $search_use_regexp ? ('-E', '-i') : '-F',
5876                 $searchtext, $co{'tree'}
5877                         or die_error(500, "Open git-grep failed");
5878
5879         git_header_html();
5880
5881         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5882         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5883
5884         print "<table class=\"grep_search\">\n";
5885         my $alternate = 1;
5886         my $matches = 0;
5887         my $lastfile = '';
5888         while (my $line = <$fd>) {
5889                 chomp $line;
5890                 my ($file, $file_href, $lno, $ltext, $binary);
5891                 last if ($matches++ > 1000);
5892                 if ($line =~ /^Binary file (.+) matches$/) {
5893                         $file = $1;
5894                         $binary = 1;
5895                 } else {
5896                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5897                         $file =~ s/^$co{'tree'}://;
5898                 }
5899                 if ($file ne $lastfile) {
5900                         $lastfile and print "</td></tr>\n";
5901                         if ($alternate++) {
5902                                 print "<tr class=\"dark\">\n";
5903                         } else {
5904                                 print "<tr class=\"light\">\n";
5905                         }
5906                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5907                                           file_name=>$file);
5908                         print "<td class=\"list\">".
5909                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5910                         print "</td><td>\n";
5911                         $lastfile = $file;
5912                 }
5913                 if ($binary) {
5914                         print "<div class=\"binary\">Binary file</div>\n";
5915                 } else {
5916                         $ltext = untabify($ltext);
5917                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5918                                 $ltext = esc_html($1, -nbsp=>1);
5919                                 $ltext .= '<span class="match">';
5920                                 $ltext .= esc_html($2, -nbsp=>1);
5921                                 $ltext .= '</span>';
5922                                 $ltext .= esc_html($3, -nbsp=>1);
5923                         } else {
5924                                 $ltext = esc_html($ltext, -nbsp=>1);
5925                         }
5926                         print "<div class=\"pre\">" .
5927                                 $cgi->a({-href => $file_href.'#l'.$lno,
5928                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5929                                 ' ' .  $ltext . "</div>\n";
5930                 }
5931         }
5932         if ($lastfile) {
5933                 print "</td></tr>\n";
5934                 if ($matches > 1000) {
5935                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5936                 }
5937         } else {
5938                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5939         }
5940         close $fd;
5941
5942         print "</table>\n";
5943
5944         git_footer_html();
5945 }
5946
5947 sub git_search_grep_body {
5948         my ($commitlist, $from, $to, $extra) = @_;
5949         $from = 0 unless defined $from;
5950         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5951
5952         print "<table class=\"commit_search\">\n";
5953         my $alternate = 1;
5954         for (my $i = $from; $i <= $to; $i++) {
5955                 my %co = %{$commitlist->[$i]};
5956                 if (!%co) {
5957                         next;
5958                 }
5959                 my $commit = $co{'id'};
5960                 if ($alternate) {
5961                         print "<tr class=\"dark\">\n";
5962                 } else {
5963                         print "<tr class=\"light\">\n";
5964                 }
5965                 $alternate ^= 1;
5966                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5967                       format_author_html('td', \%co, 15, 5) .
5968                       "<td>" .
5969                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5970                                -class => "list subject"},
5971                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5972                 my $comment = $co{'comment'};
5973                 foreach my $line (@$comment) {
5974                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5975                                 my ($lead, $match, $trail) = ($1, $2, $3);
5976                                 $match = chop_str($match, 70, 5, 'center');
5977                                 my $contextlen = int((80 - length($match))/2);
5978                                 $contextlen = 30 if ($contextlen > 30);
5979                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5980                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5981
5982                                 $lead  = esc_html($lead);
5983                                 $match = esc_html($match);
5984                                 $trail = esc_html($trail);
5985
5986                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5987                         }
5988                 }
5989                 print "</td>\n" .
5990                       "<td class=\"link\">" .
5991                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5992                       " | " .
5993                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5994                       " | " .
5995                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5996                 print "</td>\n" .
5997                       "</tr>\n";
5998         }
5999         if (defined $extra) {
6000                 print "<tr>\n" .
6001                       "<td colspan=\"3\">$extra</td>\n" .
6002                       "</tr>\n";
6003         }
6004         print "</table>\n";
6005 }
6006
6007 ## ======================================================================
6008 ## ======================================================================
6009 ## actions
6010
6011 sub git_project_list {
6012         my $order = $input_params{'order'};
6013         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6014                 die_error(400, "Unknown order parameter");
6015         }
6016
6017         my @list = git_get_projects_list($project_filter, $strict_export);
6018         if (!@list) {
6019                 die_error(404, "No projects found");
6020         }
6021
6022         git_header_html();
6023         if (defined $home_text && -f $home_text) {
6024                 print "<div class=\"index_include\">\n";
6025                 insert_file($home_text);
6026                 print "</div>\n";
6027         }
6028         print $cgi->startform(-method => "get") .
6029               "<p class=\"projsearch\">Search:\n" .
6030               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6031               "</p>" .
6032               $cgi->end_form() . "\n";
6033         git_project_list_body(\@list, $order);
6034         git_footer_html();
6035 }
6036
6037 sub git_forks {
6038         my $order = $input_params{'order'};
6039         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6040                 die_error(400, "Unknown order parameter");
6041         }
6042
6043         my $filter = $project;
6044         $filter =~ s/\.git$//;
6045         my @list = git_get_projects_list($filter);
6046         if (!@list) {
6047                 die_error(404, "No forks found");
6048         }
6049
6050         git_header_html();
6051         git_print_page_nav('','');
6052         git_print_header_div('summary', "$project forks");
6053         git_project_list_body(\@list, $order);
6054         git_footer_html();
6055 }
6056
6057 sub git_project_index {
6058         my @projects = git_get_projects_list($project_filter, $strict_export);
6059         if (!@projects) {
6060                 die_error(404, "No projects found");
6061         }
6062
6063         print $cgi->header(
6064                 -type => 'text/plain',
6065                 -charset => 'utf-8',
6066                 -content_disposition => 'inline; filename="index.aux"');
6067
6068         foreach my $pr (@projects) {
6069                 if (!exists $pr->{'owner'}) {
6070                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6071                 }
6072
6073                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6074                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6075                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6076                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6077                 $path  =~ s/ /\+/g;
6078                 $owner =~ s/ /\+/g;
6079
6080                 print "$path $owner\n";
6081         }
6082 }
6083
6084 sub git_summary {
6085         my $descr = git_get_project_description($project) || "none";
6086         my %co = parse_commit("HEAD");
6087         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6088         my $head = $co{'id'};
6089         my $remote_heads = gitweb_check_feature('remote_heads');
6090
6091         my $owner = git_get_project_owner($project);
6092
6093         my $refs = git_get_references();
6094         # These get_*_list functions return one more to allow us to see if
6095         # there are more ...
6096         my @taglist  = git_get_tags_list(16);
6097         my @headlist = git_get_heads_list(16);
6098         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6099         my @forklist;
6100         my $check_forks = gitweb_check_feature('forks');
6101
6102         if ($check_forks) {
6103                 # find forks of a project
6104                 my $filter = $project;
6105                 $filter =~ s/\.git$//;
6106                 @forklist = git_get_projects_list($filter);
6107                 # filter out forks of forks
6108                 @forklist = filter_forks_from_projects_list(\@forklist)
6109                         if (@forklist);
6110         }
6111
6112         git_header_html();
6113         git_print_page_nav('summary','', $head);
6114
6115         print "<div class=\"title\">&nbsp;</div>\n";
6116         print "<table class=\"projects_list\">\n" .
6117               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6118               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6119         if (defined $cd{'rfc2822'}) {
6120                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6121                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6122         }
6123
6124         # use per project git URL list in $projectroot/$project/cloneurl
6125         # or make project git URL from git base URL and project name
6126         my $url_tag = "URL";
6127         my @url_list = git_get_project_url_list($project);
6128         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6129         foreach my $git_url (@url_list) {
6130                 next unless $git_url;
6131                 print format_repo_url($url_tag, $git_url);
6132                 $url_tag = "";
6133         }
6134
6135         # Tag cloud
6136         my $show_ctags = gitweb_check_feature('ctags');
6137         if ($show_ctags) {
6138                 my $ctags = git_get_project_ctags($project);
6139                 if (%$ctags) {
6140                         # without ability to add tags, don't show if there are none
6141                         my $cloud = git_populate_project_tagcloud($ctags);
6142                         print "<tr id=\"metadata_ctags\">" .
6143                               "<td>content tags</td>" .
6144                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6145                               "</tr>\n";
6146                 }
6147         }
6148
6149         print "</table>\n";
6150
6151         # If XSS prevention is on, we don't include README.html.
6152         # TODO: Allow a readme in some safe format.
6153         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6154                 print "<div class=\"title\">readme</div>\n" .
6155                       "<div class=\"readme\">\n";
6156                 insert_file("$projectroot/$project/README.html");
6157                 print "\n</div>\n"; # class="readme"
6158         }
6159
6160         # we need to request one more than 16 (0..15) to check if
6161         # those 16 are all
6162         my @commitlist = $head ? parse_commits($head, 17) : ();
6163         if (@commitlist) {
6164                 git_print_header_div('shortlog');
6165                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6166                                   $#commitlist <=  15 ? undef :
6167                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6168         }
6169
6170         if (@taglist) {
6171                 git_print_header_div('tags');
6172                 git_tags_body(\@taglist, 0, 15,
6173                               $#taglist <=  15 ? undef :
6174                               $cgi->a({-href => href(action=>"tags")}, "..."));
6175         }
6176
6177         if (@headlist) {
6178                 git_print_header_div('heads');
6179                 git_heads_body(\@headlist, $head, 0, 15,
6180                                $#headlist <= 15 ? undef :
6181                                $cgi->a({-href => href(action=>"heads")}, "..."));
6182         }
6183
6184         if (%remotedata) {
6185                 git_print_header_div('remotes');
6186                 git_remotes_body(\%remotedata, 15, $head);
6187         }
6188
6189         if (@forklist) {
6190                 git_print_header_div('forks');
6191                 git_project_list_body(\@forklist, 'age', 0, 15,
6192                                       $#forklist <= 15 ? undef :
6193                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6194                                       'no_header');
6195         }
6196
6197         git_footer_html();
6198 }
6199
6200 sub git_tag {
6201         my %tag = parse_tag($hash);
6202
6203         if (! %tag) {
6204                 die_error(404, "Unknown tag object");
6205         }
6206
6207         my $head = git_get_head_hash($project);
6208         git_header_html();
6209         git_print_page_nav('','', $head,undef,$head);
6210         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6211         print "<div class=\"title_text\">\n" .
6212               "<table class=\"object_header\">\n" .
6213               "<tr>\n" .
6214               "<td>object</td>\n" .
6215               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6216                                $tag{'object'}) . "</td>\n" .
6217               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6218                                               $tag{'type'}) . "</td>\n" .
6219               "</tr>\n";
6220         if (defined($tag{'author'})) {
6221                 git_print_authorship_rows(\%tag, 'author');
6222         }
6223         print "</table>\n\n" .
6224               "</div>\n";
6225         print "<div class=\"page_body\">";
6226         my $comment = $tag{'comment'};
6227         foreach my $line (@$comment) {
6228                 chomp $line;
6229                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6230         }
6231         print "</div>\n";
6232         git_footer_html();
6233 }
6234
6235 sub git_blame_common {
6236         my $format = shift || 'porcelain';
6237         if ($format eq 'porcelain' && $cgi->param('js')) {
6238                 $format = 'incremental';
6239                 $action = 'blame_incremental'; # for page title etc
6240         }
6241
6242         # permissions
6243         gitweb_check_feature('blame')
6244                 or die_error(403, "Blame view not allowed");
6245
6246         # error checking
6247         die_error(400, "No file name given") unless $file_name;
6248         $hash_base ||= git_get_head_hash($project);
6249         die_error(404, "Couldn't find base commit") unless $hash_base;
6250         my %co = parse_commit($hash_base)
6251                 or die_error(404, "Commit not found");
6252         my $ftype = "blob";
6253         if (!defined $hash) {
6254                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6255                         or die_error(404, "Error looking up file");
6256         } else {
6257                 $ftype = git_get_type($hash);
6258                 if ($ftype !~ "blob") {
6259                         die_error(400, "Object is not a blob");
6260                 }
6261         }
6262
6263         my $fd;
6264         if ($format eq 'incremental') {
6265                 # get file contents (as base)
6266                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6267                         or die_error(500, "Open git-cat-file failed");
6268         } elsif ($format eq 'data') {
6269                 # run git-blame --incremental
6270                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6271                         $hash_base, "--", $file_name
6272                         or die_error(500, "Open git-blame --incremental failed");
6273         } else {
6274                 # run git-blame --porcelain
6275                 open $fd, "-|", git_cmd(), "blame", '-p',
6276                         $hash_base, '--', $file_name
6277                         or die_error(500, "Open git-blame --porcelain failed");
6278         }
6279
6280         # incremental blame data returns early
6281         if ($format eq 'data') {
6282                 print $cgi->header(
6283                         -type=>"text/plain", -charset => "utf-8",
6284                         -status=> "200 OK");
6285                 local $| = 1; # output autoflush
6286                 while (my $line = <$fd>) {
6287                         print to_utf8($line);
6288                 }
6289                 close $fd
6290                         or print "ERROR $!\n";
6291
6292                 print 'END';
6293                 if (defined $t0 && gitweb_check_feature('timed')) {
6294                         print ' '.
6295                               tv_interval($t0, [ gettimeofday() ]).
6296                               ' '.$number_of_git_cmds;
6297                 }
6298                 print "\n";
6299
6300                 return;
6301         }
6302
6303         # page header
6304         git_header_html();
6305         my $formats_nav =
6306                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6307                         "blob") .
6308                 " | ";
6309         if ($format eq 'incremental') {
6310                 $formats_nav .=
6311                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6312                                 "blame") . " (non-incremental)";
6313         } else {
6314                 $formats_nav .=
6315                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6316                                 "blame") . " (incremental)";
6317         }
6318         $formats_nav .=
6319                 " | " .
6320                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6321                         "history") .
6322                 " | " .
6323                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6324                         "HEAD");
6325         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6326         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6327         git_print_page_path($file_name, $ftype, $hash_base);
6328
6329         # page body
6330         if ($format eq 'incremental') {
6331                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6332                       "This page requires JavaScript to run.\n Use ".
6333                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6334                               'this page').
6335                       " instead.\n".
6336                       "</b></center></div>\n</noscript>\n";
6337
6338                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6339         }
6340
6341         print qq!<div class="page_body">\n!;
6342         print qq!<div id="progress_info">... / ...</div>\n!
6343                 if ($format eq 'incremental');
6344         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6345               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6346               qq!<thead>\n!.
6347               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6348               qq!</thead>\n!.
6349               qq!<tbody>\n!;
6350
6351         my @rev_color = qw(light dark);
6352         my $num_colors = scalar(@rev_color);
6353         my $current_color = 0;
6354
6355         if ($format eq 'incremental') {
6356                 my $color_class = $rev_color[$current_color];
6357
6358                 #contents of a file
6359                 my $linenr = 0;
6360         LINE:
6361                 while (my $line = <$fd>) {
6362                         chomp $line;
6363                         $linenr++;
6364
6365                         print qq!<tr id="l$linenr" class="$color_class">!.
6366                               qq!<td class="sha1"><a href=""> </a></td>!.
6367                               qq!<td class="linenr">!.
6368                               qq!<a class="linenr" href="">$linenr</a></td>!;
6369                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6370                         print qq!</tr>\n!;
6371                 }
6372
6373         } else { # porcelain, i.e. ordinary blame
6374                 my %metainfo = (); # saves information about commits
6375
6376                 # blame data
6377         LINE:
6378                 while (my $line = <$fd>) {
6379                         chomp $line;
6380                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6381                         # no <lines in group> for subsequent lines in group of lines
6382                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6383                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6384                         if (!exists $metainfo{$full_rev}) {
6385                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6386                         }
6387                         my $meta = $metainfo{$full_rev};
6388                         my $data;
6389                         while ($data = <$fd>) {
6390                                 chomp $data;
6391                                 last if ($data =~ s/^\t//); # contents of line
6392                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6393                                         $meta->{$1} = $2 unless exists $meta->{$1};
6394                                 }
6395                                 if ($data =~ /^previous /) {
6396                                         $meta->{'nprevious'}++;
6397                                 }
6398                         }
6399                         my $short_rev = substr($full_rev, 0, 8);
6400                         my $author = $meta->{'author'};
6401                         my %date =
6402                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6403                         my $date = $date{'iso-tz'};
6404                         if ($group_size) {
6405                                 $current_color = ($current_color + 1) % $num_colors;
6406                         }
6407                         my $tr_class = $rev_color[$current_color];
6408                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6409                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6410                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6411                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6412                         if ($group_size) {
6413                                 print "<td class=\"sha1\"";
6414                                 print " title=\"". esc_html($author) . ", $date\"";
6415                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6416                                 print ">";
6417                                 print $cgi->a({-href => href(action=>"commit",
6418                                                              hash=>$full_rev,
6419                                                              file_name=>$file_name)},
6420                                               esc_html($short_rev));
6421                                 if ($group_size >= 2) {
6422                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6423                                         if (@author_initials) {
6424                                                 print "<br />" .
6425                                                       esc_html(join('', @author_initials));
6426                                                 #           or join('.', ...)
6427                                         }
6428                                 }
6429                                 print "</td>\n";
6430                         }
6431                         # 'previous' <sha1 of parent commit> <filename at commit>
6432                         if (exists $meta->{'previous'} &&
6433                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6434                                 $meta->{'parent'} = $1;
6435                                 $meta->{'file_parent'} = unquote($2);
6436                         }
6437                         my $linenr_commit =
6438                                 exists($meta->{'parent'}) ?
6439                                 $meta->{'parent'} : $full_rev;
6440                         my $linenr_filename =
6441                                 exists($meta->{'file_parent'}) ?
6442                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6443                         my $blamed = href(action => 'blame',
6444                                           file_name => $linenr_filename,
6445                                           hash_base => $linenr_commit);
6446                         print "<td class=\"linenr\">";
6447                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6448                                         -class => "linenr" },
6449                                       esc_html($lineno));
6450                         print "</td>";
6451                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6452                         print "</tr>\n";
6453                 } # end while
6454
6455         }
6456
6457         # footer
6458         print "</tbody>\n".
6459               "</table>\n"; # class="blame"
6460         print "</div>\n";   # class="blame_body"
6461         close $fd
6462                 or print "Reading blob failed\n";
6463
6464         git_footer_html();
6465 }
6466
6467 sub git_blame {
6468         git_blame_common();
6469 }
6470
6471 sub git_blame_incremental {
6472         git_blame_common('incremental');
6473 }
6474
6475 sub git_blame_data {
6476         git_blame_common('data');
6477 }
6478
6479 sub git_tags {
6480         my $head = git_get_head_hash($project);
6481         git_header_html();
6482         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6483         git_print_header_div('summary', $project);
6484
6485         my @tagslist = git_get_tags_list();
6486         if (@tagslist) {
6487                 git_tags_body(\@tagslist);
6488         }
6489         git_footer_html();
6490 }
6491
6492 sub git_heads {
6493         my $head = git_get_head_hash($project);
6494         git_header_html();
6495         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6496         git_print_header_div('summary', $project);
6497
6498         my @headslist = git_get_heads_list();
6499         if (@headslist) {
6500                 git_heads_body(\@headslist, $head);
6501         }
6502         git_footer_html();
6503 }
6504
6505 # used both for single remote view and for list of all the remotes
6506 sub git_remotes {
6507         gitweb_check_feature('remote_heads')
6508                 or die_error(403, "Remote heads view is disabled");
6509
6510         my $head = git_get_head_hash($project);
6511         my $remote = $input_params{'hash'};
6512
6513         my $remotedata = git_get_remotes_list($remote);
6514         die_error(500, "Unable to get remote information") unless defined $remotedata;
6515
6516         unless (%$remotedata) {
6517                 die_error(404, defined $remote ?
6518                         "Remote $remote not found" :
6519                         "No remotes found");
6520         }
6521
6522         git_header_html(undef, undef, -action_extra => $remote);
6523         git_print_page_nav('', '',  $head, undef, $head,
6524                 format_ref_views($remote ? '' : 'remotes'));
6525
6526         fill_remote_heads($remotedata);
6527         if (defined $remote) {
6528                 git_print_header_div('remotes', "$remote remote for $project");
6529                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6530         } else {
6531                 git_print_header_div('summary', "$project remotes");
6532                 git_remotes_body($remotedata, undef, $head);
6533         }
6534
6535         git_footer_html();
6536 }
6537
6538 sub git_blob_plain {
6539         my $type = shift;
6540         my $expires;
6541
6542         if (!defined $hash) {
6543                 if (defined $file_name) {
6544                         my $base = $hash_base || git_get_head_hash($project);
6545                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6546                                 or die_error(404, "Cannot find file");
6547                 } else {
6548                         die_error(400, "No file name defined");
6549                 }
6550         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6551                 # blobs defined by non-textual hash id's can be cached
6552                 $expires = "+1d";
6553         }
6554
6555         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6556                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6557
6558         # content-type (can include charset)
6559         $type = blob_contenttype($fd, $file_name, $type);
6560
6561         # "save as" filename, even when no $file_name is given
6562         my $save_as = "$hash";
6563         if (defined $file_name) {
6564                 $save_as = $file_name;
6565         } elsif ($type =~ m/^text\//) {
6566                 $save_as .= '.txt';
6567         }
6568
6569         # With XSS prevention on, blobs of all types except a few known safe
6570         # ones are served with "Content-Disposition: attachment" to make sure
6571         # they don't run in our security domain.  For certain image types,
6572         # blob view writes an <img> tag referring to blob_plain view, and we
6573         # want to be sure not to break that by serving the image as an
6574         # attachment (though Firefox 3 doesn't seem to care).
6575         my $sandbox = $prevent_xss &&
6576                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6577
6578         # serve text/* as text/plain
6579         if ($prevent_xss &&
6580             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6581              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6582                 my $rest = $1;
6583                 $rest = defined $rest ? $rest : '';
6584                 $type = "text/plain$rest";
6585         }
6586
6587         print $cgi->header(
6588                 -type => $type,
6589                 -expires => $expires,
6590                 -content_disposition =>
6591                         ($sandbox ? 'attachment' : 'inline')
6592                         . '; filename="' . $save_as . '"');
6593         local $/ = undef;
6594         binmode STDOUT, ':raw';
6595         print <$fd>;
6596         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6597         close $fd;
6598 }
6599
6600 sub git_blob {
6601         my $expires;
6602
6603         if (!defined $hash) {
6604                 if (defined $file_name) {
6605                         my $base = $hash_base || git_get_head_hash($project);
6606                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6607                                 or die_error(404, "Cannot find file");
6608                 } else {
6609                         die_error(400, "No file name defined");
6610                 }
6611         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6612                 # blobs defined by non-textual hash id's can be cached
6613                 $expires = "+1d";
6614         }
6615
6616         my $have_blame = gitweb_check_feature('blame');
6617         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6618                 or die_error(500, "Couldn't cat $file_name, $hash");
6619         my $mimetype = blob_mimetype($fd, $file_name);
6620         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6621         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6622                 close $fd;
6623                 return git_blob_plain($mimetype);
6624         }
6625         # we can have blame only for text/* mimetype
6626         $have_blame &&= ($mimetype =~ m!^text/!);
6627
6628         my $highlight = gitweb_check_feature('highlight');
6629         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6630         $fd = run_highlighter($fd, $highlight, $syntax)
6631                 if $syntax;
6632
6633         git_header_html(undef, $expires);
6634         my $formats_nav = '';
6635         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6636                 if (defined $file_name) {
6637                         if ($have_blame) {
6638                                 $formats_nav .=
6639                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6640                                                 "blame") .
6641                                         " | ";
6642                         }
6643                         $formats_nav .=
6644                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6645                                         "history") .
6646                                 " | " .
6647                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6648                                         "raw") .
6649                                 " | " .
6650                                 $cgi->a({-href => href(action=>"blob",
6651                                                        hash_base=>"HEAD", file_name=>$file_name)},
6652                                         "HEAD");
6653                 } else {
6654                         $formats_nav .=
6655                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6656                                         "raw");
6657                 }
6658                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6659                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6660         } else {
6661                 print "<div class=\"page_nav\">\n" .
6662                       "<br/><br/></div>\n" .
6663                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6664         }
6665         git_print_page_path($file_name, "blob", $hash_base);
6666         print "<div class=\"page_body\">\n";
6667         if ($mimetype =~ m!^image/!) {
6668                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6669                 if ($file_name) {
6670                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6671                 }
6672                 print qq! src="! .
6673                       href(action=>"blob_plain", hash=>$hash,
6674                            hash_base=>$hash_base, file_name=>$file_name) .
6675                       qq!" />\n!;
6676         } else {
6677                 my $nr;
6678                 while (my $line = <$fd>) {
6679                         chomp $line;
6680                         $nr++;
6681                         $line = untabify($line);
6682                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6683                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6684                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6685                 }
6686         }
6687         close $fd
6688                 or print "Reading blob failed.\n";
6689         print "</div>";
6690         git_footer_html();
6691 }
6692
6693 sub git_tree {
6694         if (!defined $hash_base) {
6695                 $hash_base = "HEAD";
6696         }
6697         if (!defined $hash) {
6698                 if (defined $file_name) {
6699                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6700                 } else {
6701                         $hash = $hash_base;
6702                 }
6703         }
6704         die_error(404, "No such tree") unless defined($hash);
6705
6706         my $show_sizes = gitweb_check_feature('show-sizes');
6707         my $have_blame = gitweb_check_feature('blame');
6708
6709         my @entries = ();
6710         {
6711                 local $/ = "\0";
6712                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6713                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6714                         or die_error(500, "Open git-ls-tree failed");
6715                 @entries = map { chomp; $_ } <$fd>;
6716                 close $fd
6717                         or die_error(404, "Reading tree failed");
6718         }
6719
6720         my $refs = git_get_references();
6721         my $ref = format_ref_marker($refs, $hash_base);
6722         git_header_html();
6723         my $basedir = '';
6724         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6725                 my @views_nav = ();
6726                 if (defined $file_name) {
6727                         push @views_nav,
6728                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6729                                         "history"),
6730                                 $cgi->a({-href => href(action=>"tree",
6731                                                        hash_base=>"HEAD", file_name=>$file_name)},
6732                                         "HEAD"),
6733                 }
6734                 my $snapshot_links = format_snapshot_links($hash);
6735                 if (defined $snapshot_links) {
6736                         # FIXME: Should be available when we have no hash base as well.
6737                         push @views_nav, $snapshot_links;
6738                 }
6739                 git_print_page_nav('tree','', $hash_base, undef, undef,
6740                                    join(' | ', @views_nav));
6741                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6742         } else {
6743                 undef $hash_base;
6744                 print "<div class=\"page_nav\">\n";
6745                 print "<br/><br/></div>\n";
6746                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6747         }
6748         if (defined $file_name) {
6749                 $basedir = $file_name;
6750                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6751                         $basedir .= '/';
6752                 }
6753                 git_print_page_path($file_name, 'tree', $hash_base);
6754         }
6755         print "<div class=\"page_body\">\n";
6756         print "<table class=\"tree\">\n";
6757         my $alternate = 1;
6758         # '..' (top directory) link if possible
6759         if (defined $hash_base &&
6760             defined $file_name && $file_name =~ m![^/]+$!) {
6761                 if ($alternate) {
6762                         print "<tr class=\"dark\">\n";
6763                 } else {
6764                         print "<tr class=\"light\">\n";
6765                 }
6766                 $alternate ^= 1;
6767
6768                 my $up = $file_name;
6769                 $up =~ s!/?[^/]+$!!;
6770                 undef $up unless $up;
6771                 # based on git_print_tree_entry
6772                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6773                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6774                 print '<td class="list">';
6775                 print $cgi->a({-href => href(action=>"tree",
6776                                              hash_base=>$hash_base,
6777                                              file_name=>$up)},
6778                               "..");
6779                 print "</td>\n";
6780                 print "<td class=\"link\"></td>\n";
6781
6782                 print "</tr>\n";
6783         }
6784         foreach my $line (@entries) {
6785                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6786
6787                 if ($alternate) {
6788                         print "<tr class=\"dark\">\n";
6789                 } else {
6790                         print "<tr class=\"light\">\n";
6791                 }
6792                 $alternate ^= 1;
6793
6794                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6795
6796                 print "</tr>\n";
6797         }
6798         print "</table>\n" .
6799               "</div>";
6800         git_footer_html();
6801 }
6802
6803 sub snapshot_name {
6804         my ($project, $hash) = @_;
6805
6806         # path/to/project.git  -> project
6807         # path/to/project/.git -> project
6808         my $name = to_utf8($project);
6809         $name =~ s,([^/])/*\.git$,$1,;
6810         $name = basename($name);
6811         # sanitize name
6812         $name =~ s/[[:cntrl:]]/?/g;
6813
6814         my $ver = $hash;
6815         if ($hash =~ /^[0-9a-fA-F]+$/) {
6816                 # shorten SHA-1 hash
6817                 my $full_hash = git_get_full_hash($project, $hash);
6818                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6819                         $ver = git_get_short_hash($project, $hash);
6820                 }
6821         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6822                 # tags don't need shortened SHA-1 hash
6823                 $ver = $1;
6824         } else {
6825                 # branches and other need shortened SHA-1 hash
6826                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6827                         $ver = $1;
6828                 }
6829                 $ver .= '-' . git_get_short_hash($project, $hash);
6830         }
6831         # in case of hierarchical branch names
6832         $ver =~ s!/!.!g;
6833
6834         # name = project-version_string
6835         $name = "$name-$ver";
6836
6837         return wantarray ? ($name, $name) : $name;
6838 }
6839
6840 sub git_snapshot {
6841         my $format = $input_params{'snapshot_format'};
6842         if (!@snapshot_fmts) {
6843                 die_error(403, "Snapshots not allowed");
6844         }
6845         # default to first supported snapshot format
6846         $format ||= $snapshot_fmts[0];
6847         if ($format !~ m/^[a-z0-9]+$/) {
6848                 die_error(400, "Invalid snapshot format parameter");
6849         } elsif (!exists($known_snapshot_formats{$format})) {
6850                 die_error(400, "Unknown snapshot format");
6851         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6852                 die_error(403, "Snapshot format not allowed");
6853         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6854                 die_error(403, "Unsupported snapshot format");
6855         }
6856
6857         my $type = git_get_type("$hash^{}");
6858         if (!$type) {
6859                 die_error(404, 'Object does not exist');
6860         }  elsif ($type eq 'blob') {
6861                 die_error(400, 'Object is not a tree-ish');
6862         }
6863
6864         my ($name, $prefix) = snapshot_name($project, $hash);
6865         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6866         my $cmd = quote_command(
6867                 git_cmd(), 'archive',
6868                 "--format=$known_snapshot_formats{$format}{'format'}",
6869                 "--prefix=$prefix/", $hash);
6870         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6871                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6872         }
6873
6874         $filename =~ s/(["\\])/\\$1/g;
6875         print $cgi->header(
6876                 -type => $known_snapshot_formats{$format}{'type'},
6877                 -content_disposition => 'inline; filename="' . $filename . '"',
6878                 -status => '200 OK');
6879
6880         open my $fd, "-|", $cmd
6881                 or die_error(500, "Execute git-archive failed");
6882         binmode STDOUT, ':raw';
6883         print <$fd>;
6884         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6885         close $fd;
6886 }
6887
6888 sub git_log_generic {
6889         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6890
6891         my $head = git_get_head_hash($project);
6892         if (!defined $base) {
6893                 $base = $head;
6894         }
6895         if (!defined $page) {
6896                 $page = 0;
6897         }
6898         my $refs = git_get_references();
6899
6900         my $commit_hash = $base;
6901         if (defined $parent) {
6902                 $commit_hash = "$parent..$base";
6903         }
6904         my @commitlist =
6905                 parse_commits($commit_hash, 101, (100 * $page),
6906                               defined $file_name ? ($file_name, "--full-history") : ());
6907
6908         my $ftype;
6909         if (!defined $file_hash && defined $file_name) {
6910                 # some commits could have deleted file in question,
6911                 # and not have it in tree, but one of them has to have it
6912                 for (my $i = 0; $i < @commitlist; $i++) {
6913                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6914                         last if defined $file_hash;
6915                 }
6916         }
6917         if (defined $file_hash) {
6918                 $ftype = git_get_type($file_hash);
6919         }
6920         if (defined $file_name && !defined $ftype) {
6921                 die_error(500, "Unknown type of object");
6922         }
6923         my %co;
6924         if (defined $file_name) {
6925                 %co = parse_commit($base)
6926                         or die_error(404, "Unknown commit object");
6927         }
6928
6929
6930         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6931         my $next_link = '';
6932         if ($#commitlist >= 100) {
6933                 $next_link =
6934                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6935                                  -accesskey => "n", -title => "Alt-n"}, "next");
6936         }
6937         my $patch_max = gitweb_get_feature('patches');
6938         if ($patch_max && !defined $file_name) {
6939                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6940                         $paging_nav .= " &sdot; " .
6941                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6942                                         "patches");
6943                 }
6944         }
6945
6946         git_header_html();
6947         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6948         if (defined $file_name) {
6949                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6950         } else {
6951                 git_print_header_div('summary', $project)
6952         }
6953         git_print_page_path($file_name, $ftype, $hash_base)
6954                 if (defined $file_name);
6955
6956         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6957                      $file_name, $file_hash, $ftype);
6958
6959         git_footer_html();
6960 }
6961
6962 sub git_log {
6963         git_log_generic('log', \&git_log_body,
6964                         $hash, $hash_parent);
6965 }
6966
6967 sub git_commit {
6968         $hash ||= $hash_base || "HEAD";
6969         my %co = parse_commit($hash)
6970             or die_error(404, "Unknown commit object");
6971
6972         my $parent  = $co{'parent'};
6973         my $parents = $co{'parents'}; # listref
6974
6975         # we need to prepare $formats_nav before any parameter munging
6976         my $formats_nav;
6977         if (!defined $parent) {
6978                 # --root commitdiff
6979                 $formats_nav .= '(initial)';
6980         } elsif (@$parents == 1) {
6981                 # single parent commit
6982                 $formats_nav .=
6983                         '(parent: ' .
6984                         $cgi->a({-href => href(action=>"commit",
6985                                                hash=>$parent)},
6986                                 esc_html(substr($parent, 0, 7))) .
6987                         ')';
6988         } else {
6989                 # merge commit
6990                 $formats_nav .=
6991                         '(merge: ' .
6992                         join(' ', map {
6993                                 $cgi->a({-href => href(action=>"commit",
6994                                                        hash=>$_)},
6995                                         esc_html(substr($_, 0, 7)));
6996                         } @$parents ) .
6997                         ')';
6998         }
6999         if (gitweb_check_feature('patches') && @$parents <= 1) {
7000                 $formats_nav .= " | " .
7001                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7002                                 "patch");
7003         }
7004
7005         if (!defined $parent) {
7006                 $parent = "--root";
7007         }
7008         my @difftree;
7009         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7010                 @diff_opts,
7011                 (@$parents <= 1 ? $parent : '-c'),
7012                 $hash, "--"
7013                 or die_error(500, "Open git-diff-tree failed");
7014         @difftree = map { chomp; $_ } <$fd>;
7015         close $fd or die_error(404, "Reading git-diff-tree failed");
7016
7017         # non-textual hash id's can be cached
7018         my $expires;
7019         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7020                 $expires = "+1d";
7021         }
7022         my $refs = git_get_references();
7023         my $ref = format_ref_marker($refs, $co{'id'});
7024
7025         git_header_html(undef, $expires);
7026         git_print_page_nav('commit', '',
7027                            $hash, $co{'tree'}, $hash,
7028                            $formats_nav);
7029
7030         if (defined $co{'parent'}) {
7031                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7032         } else {
7033                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7034         }
7035         print "<div class=\"title_text\">\n" .
7036               "<table class=\"object_header\">\n";
7037         git_print_authorship_rows(\%co);
7038         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7039         print "<tr>" .
7040               "<td>tree</td>" .
7041               "<td class=\"sha1\">" .
7042               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7043                        class => "list"}, $co{'tree'}) .
7044               "</td>" .
7045               "<td class=\"link\">" .
7046               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7047                       "tree");
7048         my $snapshot_links = format_snapshot_links($hash);
7049         if (defined $snapshot_links) {
7050                 print " | " . $snapshot_links;
7051         }
7052         print "</td>" .
7053               "</tr>\n";
7054
7055         foreach my $par (@$parents) {
7056                 print "<tr>" .
7057                       "<td>parent</td>" .
7058                       "<td class=\"sha1\">" .
7059                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7060                                class => "list"}, $par) .
7061                       "</td>" .
7062                       "<td class=\"link\">" .
7063                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7064                       " | " .
7065                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7066                       "</td>" .
7067                       "</tr>\n";
7068         }
7069         print "</table>".
7070               "</div>\n";
7071
7072         print "<div class=\"page_body\">\n";
7073         git_print_log($co{'comment'});
7074         print "</div>\n";
7075
7076         git_difftree_body(\@difftree, $hash, @$parents);
7077
7078         git_footer_html();
7079 }
7080
7081 sub git_object {
7082         # object is defined by:
7083         # - hash or hash_base alone
7084         # - hash_base and file_name
7085         my $type;
7086
7087         # - hash or hash_base alone
7088         if ($hash || ($hash_base && !defined $file_name)) {
7089                 my $object_id = $hash || $hash_base;
7090
7091                 open my $fd, "-|", quote_command(
7092                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7093                         or die_error(404, "Object does not exist");
7094                 $type = <$fd>;
7095                 chomp $type;
7096                 close $fd
7097                         or die_error(404, "Object does not exist");
7098
7099         # - hash_base and file_name
7100         } elsif ($hash_base && defined $file_name) {
7101                 $file_name =~ s,/+$,,;
7102
7103                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7104                         or die_error(404, "Base object does not exist");
7105
7106                 # here errors should not hapen
7107                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7108                         or die_error(500, "Open git-ls-tree failed");
7109                 my $line = <$fd>;
7110                 close $fd;
7111
7112                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7113                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7114                         die_error(404, "File or directory for given base does not exist");
7115                 }
7116                 $type = $2;
7117                 $hash = $3;
7118         } else {
7119                 die_error(400, "Not enough information to find object");
7120         }
7121
7122         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7123                                           hash=>$hash, hash_base=>$hash_base,
7124                                           file_name=>$file_name),
7125                              -status => '302 Found');
7126 }
7127
7128 sub git_blobdiff {
7129         my $format = shift || 'html';
7130         my $diff_style = $input_params{'diff_style'} || 'inline';
7131
7132         my $fd;
7133         my @difftree;
7134         my %diffinfo;
7135         my $expires;
7136
7137         # preparing $fd and %diffinfo for git_patchset_body
7138         # new style URI
7139         if (defined $hash_base && defined $hash_parent_base) {
7140                 if (defined $file_name) {
7141                         # read raw output
7142                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7143                                 $hash_parent_base, $hash_base,
7144                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7145                                 or die_error(500, "Open git-diff-tree failed");
7146                         @difftree = map { chomp; $_ } <$fd>;
7147                         close $fd
7148                                 or die_error(404, "Reading git-diff-tree failed");
7149                         @difftree
7150                                 or die_error(404, "Blob diff not found");
7151
7152                 } elsif (defined $hash &&
7153                          $hash =~ /[0-9a-fA-F]{40}/) {
7154                         # try to find filename from $hash
7155
7156                         # read filtered raw output
7157                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7158                                 $hash_parent_base, $hash_base, "--"
7159                                 or die_error(500, "Open git-diff-tree failed");
7160                         @difftree =
7161                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7162                                 # $hash == to_id
7163                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7164                                 map { chomp; $_ } <$fd>;
7165                         close $fd
7166                                 or die_error(404, "Reading git-diff-tree failed");
7167                         @difftree
7168                                 or die_error(404, "Blob diff not found");
7169
7170                 } else {
7171                         die_error(400, "Missing one of the blob diff parameters");
7172                 }
7173
7174                 if (@difftree > 1) {
7175                         die_error(400, "Ambiguous blob diff specification");
7176                 }
7177
7178                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7179                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7180                 $file_name   ||= $diffinfo{'to_file'};
7181
7182                 $hash_parent ||= $diffinfo{'from_id'};
7183                 $hash        ||= $diffinfo{'to_id'};
7184
7185                 # non-textual hash id's can be cached
7186                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7187                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7188                         $expires = '+1d';
7189                 }
7190
7191                 # open patch output
7192                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7193                         '-p', ($format eq 'html' ? "--full-index" : ()),
7194                         $hash_parent_base, $hash_base,
7195                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7196                         or die_error(500, "Open git-diff-tree failed");
7197         }
7198
7199         # old/legacy style URI -- not generated anymore since 1.4.3.
7200         if (!%diffinfo) {
7201                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7202         }
7203
7204         # header
7205         if ($format eq 'html') {
7206                 my $formats_nav =
7207                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7208                                 "raw");
7209                 $formats_nav .= diff_style_nav($diff_style);
7210                 git_header_html(undef, $expires);
7211                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7212                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7213                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7214                 } else {
7215                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7216                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7217                 }
7218                 if (defined $file_name) {
7219                         git_print_page_path($file_name, "blob", $hash_base);
7220                 } else {
7221                         print "<div class=\"page_path\"></div>\n";
7222                 }
7223
7224         } elsif ($format eq 'plain') {
7225                 print $cgi->header(
7226                         -type => 'text/plain',
7227                         -charset => 'utf-8',
7228                         -expires => $expires,
7229                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7230
7231                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7232
7233         } else {
7234                 die_error(400, "Unknown blobdiff format");
7235         }
7236
7237         # patch
7238         if ($format eq 'html') {
7239                 print "<div class=\"page_body\">\n";
7240
7241                 git_patchset_body($fd, $diff_style,
7242                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7243                 close $fd;
7244
7245                 print "</div>\n"; # class="page_body"
7246                 git_footer_html();
7247
7248         } else {
7249                 while (my $line = <$fd>) {
7250                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7251                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7252
7253                         print $line;
7254
7255                         last if $line =~ m!^\+\+\+!;
7256                 }
7257                 local $/ = undef;
7258                 print <$fd>;
7259                 close $fd;
7260         }
7261 }
7262
7263 sub git_blobdiff_plain {
7264         git_blobdiff('plain');
7265 }
7266
7267 # assumes that it is added as later part of already existing navigation,
7268 # so it returns "| foo | bar" rather than just "foo | bar"
7269 sub diff_style_nav {
7270         my ($diff_style, $is_combined) = @_;
7271         $diff_style ||= 'inline';
7272
7273         return "" if ($is_combined);
7274
7275         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7276         my %styles = @styles;
7277         @styles =
7278                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7279
7280         return join '',
7281                 map { " | ".$_ }
7282                 map {
7283                         $_ eq $diff_style ? $styles{$_} :
7284                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7285                 } @styles;
7286 }
7287
7288 sub git_commitdiff {
7289         my %params = @_;
7290         my $format = $params{-format} || 'html';
7291         my $diff_style = $input_params{'diff_style'} || 'inline';
7292
7293         my ($patch_max) = gitweb_get_feature('patches');
7294         if ($format eq 'patch') {
7295                 die_error(403, "Patch view not allowed") unless $patch_max;
7296         }
7297
7298         $hash ||= $hash_base || "HEAD";
7299         my %co = parse_commit($hash)
7300             or die_error(404, "Unknown commit object");
7301
7302         # choose format for commitdiff for merge
7303         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7304                 $hash_parent = '--cc';
7305         }
7306         # we need to prepare $formats_nav before almost any parameter munging
7307         my $formats_nav;
7308         if ($format eq 'html') {
7309                 $formats_nav =
7310                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7311                                 "raw");
7312                 if ($patch_max && @{$co{'parents'}} <= 1) {
7313                         $formats_nav .= " | " .
7314                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7315                                         "patch");
7316                 }
7317                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7318
7319                 if (defined $hash_parent &&
7320                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7321                         # commitdiff with two commits given
7322                         my $hash_parent_short = $hash_parent;
7323                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7324                                 $hash_parent_short = substr($hash_parent, 0, 7);
7325                         }
7326                         $formats_nav .=
7327                                 ' (from';
7328                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7329                                 if ($co{'parents'}[$i] eq $hash_parent) {
7330                                         $formats_nav .= ' parent ' . ($i+1);
7331                                         last;
7332                                 }
7333                         }
7334                         $formats_nav .= ': ' .
7335                                 $cgi->a({-href => href(-replay=>1,
7336                                                        hash=>$hash_parent, hash_base=>undef)},
7337                                         esc_html($hash_parent_short)) .
7338                                 ')';
7339                 } elsif (!$co{'parent'}) {
7340                         # --root commitdiff
7341                         $formats_nav .= ' (initial)';
7342                 } elsif (scalar @{$co{'parents'}} == 1) {
7343                         # single parent commit
7344                         $formats_nav .=
7345                                 ' (parent: ' .
7346                                 $cgi->a({-href => href(-replay=>1,
7347                                                        hash=>$co{'parent'}, hash_base=>undef)},
7348                                         esc_html(substr($co{'parent'}, 0, 7))) .
7349                                 ')';
7350                 } else {
7351                         # merge commit
7352                         if ($hash_parent eq '--cc') {
7353                                 $formats_nav .= ' | ' .
7354                                         $cgi->a({-href => href(-replay=>1,
7355                                                                hash=>$hash, hash_parent=>'-c')},
7356                                                 'combined');
7357                         } else { # $hash_parent eq '-c'
7358                                 $formats_nav .= ' | ' .
7359                                         $cgi->a({-href => href(-replay=>1,
7360                                                                hash=>$hash, hash_parent=>'--cc')},
7361                                                 'compact');
7362                         }
7363                         $formats_nav .=
7364                                 ' (merge: ' .
7365                                 join(' ', map {
7366                                         $cgi->a({-href => href(-replay=>1,
7367                                                                hash=>$_, hash_base=>undef)},
7368                                                 esc_html(substr($_, 0, 7)));
7369                                 } @{$co{'parents'}} ) .
7370                                 ')';
7371                 }
7372         }
7373
7374         my $hash_parent_param = $hash_parent;
7375         if (!defined $hash_parent_param) {
7376                 # --cc for multiple parents, --root for parentless
7377                 $hash_parent_param =
7378                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7379         }
7380
7381         # read commitdiff
7382         my $fd;
7383         my @difftree;
7384         if ($format eq 'html') {
7385                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7386                         "--no-commit-id", "--patch-with-raw", "--full-index",
7387                         $hash_parent_param, $hash, "--"
7388                         or die_error(500, "Open git-diff-tree failed");
7389
7390                 while (my $line = <$fd>) {
7391                         chomp $line;
7392                         # empty line ends raw part of diff-tree output
7393                         last unless $line;
7394                         push @difftree, scalar parse_difftree_raw_line($line);
7395                 }
7396
7397         } elsif ($format eq 'plain') {
7398                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7399                         '-p', $hash_parent_param, $hash, "--"
7400                         or die_error(500, "Open git-diff-tree failed");
7401         } elsif ($format eq 'patch') {
7402                 # For commit ranges, we limit the output to the number of
7403                 # patches specified in the 'patches' feature.
7404                 # For single commits, we limit the output to a single patch,
7405                 # diverging from the git-format-patch default.
7406                 my @commit_spec = ();
7407                 if ($hash_parent) {
7408                         if ($patch_max > 0) {
7409                                 push @commit_spec, "-$patch_max";
7410                         }
7411                         push @commit_spec, '-n', "$hash_parent..$hash";
7412                 } else {
7413                         if ($params{-single}) {
7414                                 push @commit_spec, '-1';
7415                         } else {
7416                                 if ($patch_max > 0) {
7417                                         push @commit_spec, "-$patch_max";
7418                                 }
7419                                 push @commit_spec, "-n";
7420                         }
7421                         push @commit_spec, '--root', $hash;
7422                 }
7423                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7424                         '--encoding=utf8', '--stdout', @commit_spec
7425                         or die_error(500, "Open git-format-patch failed");
7426         } else {
7427                 die_error(400, "Unknown commitdiff format");
7428         }
7429
7430         # non-textual hash id's can be cached
7431         my $expires;
7432         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7433                 $expires = "+1d";
7434         }
7435
7436         # write commit message
7437         if ($format eq 'html') {
7438                 my $refs = git_get_references();
7439                 my $ref = format_ref_marker($refs, $co{'id'});
7440
7441                 git_header_html(undef, $expires);
7442                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7443                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7444                 print "<div class=\"title_text\">\n" .
7445                       "<table class=\"object_header\">\n";
7446                 git_print_authorship_rows(\%co);
7447                 print "</table>".
7448                       "</div>\n";
7449                 print "<div class=\"page_body\">\n";
7450                 if (@{$co{'comment'}} > 1) {
7451                         print "<div class=\"log\">\n";
7452                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7453                         print "</div>\n"; # class="log"
7454                 }
7455
7456         } elsif ($format eq 'plain') {
7457                 my $refs = git_get_references("tags");
7458                 my $tagname = git_get_rev_name_tags($hash);
7459                 my $filename = basename($project) . "-$hash.patch";
7460
7461                 print $cgi->header(
7462                         -type => 'text/plain',
7463                         -charset => 'utf-8',
7464                         -expires => $expires,
7465                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7466                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7467                 print "From: " . to_utf8($co{'author'}) . "\n";
7468                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7469                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7470
7471                 print "X-Git-Tag: $tagname\n" if $tagname;
7472                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7473
7474                 foreach my $line (@{$co{'comment'}}) {
7475                         print to_utf8($line) . "\n";
7476                 }
7477                 print "---\n\n";
7478         } elsif ($format eq 'patch') {
7479                 my $filename = basename($project) . "-$hash.patch";
7480
7481                 print $cgi->header(
7482                         -type => 'text/plain',
7483                         -charset => 'utf-8',
7484                         -expires => $expires,
7485                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7486         }
7487
7488         # write patch
7489         if ($format eq 'html') {
7490                 my $use_parents = !defined $hash_parent ||
7491                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7492                 git_difftree_body(\@difftree, $hash,
7493                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7494                 print "<br/>\n";
7495
7496                 git_patchset_body($fd, $diff_style,
7497                                   \@difftree, $hash,
7498                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7499                 close $fd;
7500                 print "</div>\n"; # class="page_body"
7501                 git_footer_html();
7502
7503         } elsif ($format eq 'plain') {
7504                 local $/ = undef;
7505                 print <$fd>;
7506                 close $fd
7507                         or print "Reading git-diff-tree failed\n";
7508         } elsif ($format eq 'patch') {
7509                 local $/ = undef;
7510                 print <$fd>;
7511                 close $fd
7512                         or print "Reading git-format-patch failed\n";
7513         }
7514 }
7515
7516 sub git_commitdiff_plain {
7517         git_commitdiff(-format => 'plain');
7518 }
7519
7520 # format-patch-style patches
7521 sub git_patch {
7522         git_commitdiff(-format => 'patch', -single => 1);
7523 }
7524
7525 sub git_patches {
7526         git_commitdiff(-format => 'patch');
7527 }
7528
7529 sub git_history {
7530         git_log_generic('history', \&git_history_body,
7531                         $hash_base, $hash_parent_base,
7532                         $file_name, $hash);
7533 }
7534
7535 sub git_search {
7536         $searchtype ||= 'commit';
7537
7538         # check if appropriate features are enabled
7539         gitweb_check_feature('search')
7540                 or die_error(403, "Search is disabled");
7541         if ($searchtype eq 'pickaxe') {
7542                 # pickaxe may take all resources of your box and run for several minutes
7543                 # with every query - so decide by yourself how public you make this feature
7544                 gitweb_check_feature('pickaxe')
7545                         or die_error(403, "Pickaxe search is disabled");
7546         }
7547         if ($searchtype eq 'grep') {
7548                 # grep search might be potentially CPU-intensive, too
7549                 gitweb_check_feature('grep')
7550                         or die_error(403, "Grep search is disabled");
7551         }
7552
7553         if (!defined $searchtext) {
7554                 die_error(400, "Text field is empty");
7555         }
7556         if (!defined $hash) {
7557                 $hash = git_get_head_hash($project);
7558         }
7559         my %co = parse_commit($hash);
7560         if (!%co) {
7561                 die_error(404, "Unknown commit object");
7562         }
7563         if (!defined $page) {
7564                 $page = 0;
7565         }
7566
7567         if ($searchtype eq 'commit' ||
7568             $searchtype eq 'author' ||
7569             $searchtype eq 'committer') {
7570                 git_search_message(%co);
7571         } elsif ($searchtype eq 'pickaxe') {
7572                 git_search_changes(%co);
7573         } elsif ($searchtype eq 'grep') {
7574                 git_search_files(%co);
7575         } else {
7576                 die_error(400, "Unknown search type");
7577         }
7578 }
7579
7580 sub git_search_help {
7581         git_header_html();
7582         git_print_page_nav('','', $hash,$hash,$hash);
7583         print <<EOT;
7584 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7585 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7586 the pattern entered is recognized as the POSIX extended
7587 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7588 insensitive).</p>
7589 <dl>
7590 <dt><b>commit</b></dt>
7591 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7592 EOT
7593         my $have_grep = gitweb_check_feature('grep');
7594         if ($have_grep) {
7595                 print <<EOT;
7596 <dt><b>grep</b></dt>
7597 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7598     a different one) are searched for the given pattern. On large trees, this search can take
7599 a while and put some strain on the server, so please use it with some consideration. Note that
7600 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7601 case-sensitive.</dd>
7602 EOT
7603         }
7604         print <<EOT;
7605 <dt><b>author</b></dt>
7606 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7607 <dt><b>committer</b></dt>
7608 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7609 EOT
7610         my $have_pickaxe = gitweb_check_feature('pickaxe');
7611         if ($have_pickaxe) {
7612                 print <<EOT;
7613 <dt><b>pickaxe</b></dt>
7614 <dd>All commits that caused the string to appear or disappear from any file (changes that
7615 added, removed or "modified" the string) will be listed. This search can take a while and
7616 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7617 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7618 EOT
7619         }
7620         print "</dl>\n";
7621         git_footer_html();
7622 }
7623
7624 sub git_shortlog {
7625         git_log_generic('shortlog', \&git_shortlog_body,
7626                         $hash, $hash_parent);
7627 }
7628
7629 ## ......................................................................
7630 ## feeds (RSS, Atom; OPML)
7631
7632 sub git_feed {
7633         my $format = shift || 'atom';
7634         my $have_blame = gitweb_check_feature('blame');
7635
7636         # Atom: http://www.atomenabled.org/developers/syndication/
7637         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7638         if ($format ne 'rss' && $format ne 'atom') {
7639                 die_error(400, "Unknown web feed format");
7640         }
7641
7642         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7643         my $head = $hash || 'HEAD';
7644         my @commitlist = parse_commits($head, 150, 0, $file_name);
7645
7646         my %latest_commit;
7647         my %latest_date;
7648         my $content_type = "application/$format+xml";
7649         if (defined $cgi->http('HTTP_ACCEPT') &&
7650                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7651                 # browser (feed reader) prefers text/xml
7652                 $content_type = 'text/xml';
7653         }
7654         if (defined($commitlist[0])) {
7655                 %latest_commit = %{$commitlist[0]};
7656                 my $latest_epoch = $latest_commit{'committer_epoch'};
7657                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7658                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7659                 if (defined $if_modified) {
7660                         my $since;
7661                         if (eval { require HTTP::Date; 1; }) {
7662                                 $since = HTTP::Date::str2time($if_modified);
7663                         } elsif (eval { require Time::ParseDate; 1; }) {
7664                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7665                         }
7666                         if (defined $since && $latest_epoch <= $since) {
7667                                 print $cgi->header(
7668                                         -type => $content_type,
7669                                         -charset => 'utf-8',
7670                                         -last_modified => $latest_date{'rfc2822'},
7671                                         -status => '304 Not Modified');
7672                                 return;
7673                         }
7674                 }
7675                 print $cgi->header(
7676                         -type => $content_type,
7677                         -charset => 'utf-8',
7678                         -last_modified => $latest_date{'rfc2822'});
7679         } else {
7680                 print $cgi->header(
7681                         -type => $content_type,
7682                         -charset => 'utf-8');
7683         }
7684
7685         # Optimization: skip generating the body if client asks only
7686         # for Last-Modified date.
7687         return if ($cgi->request_method() eq 'HEAD');
7688
7689         # header variables
7690         my $title = "$site_name - $project/$action";
7691         my $feed_type = 'log';
7692         if (defined $hash) {
7693                 $title .= " - '$hash'";
7694                 $feed_type = 'branch log';
7695                 if (defined $file_name) {
7696                         $title .= " :: $file_name";
7697                         $feed_type = 'history';
7698                 }
7699         } elsif (defined $file_name) {
7700                 $title .= " - $file_name";
7701                 $feed_type = 'history';
7702         }
7703         $title .= " $feed_type";
7704         my $descr = git_get_project_description($project);
7705         if (defined $descr) {
7706                 $descr = esc_html($descr);
7707         } else {
7708                 $descr = "$project " .
7709                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7710                          " feed";
7711         }
7712         my $owner = git_get_project_owner($project);
7713         $owner = esc_html($owner);
7714
7715         #header
7716         my $alt_url;
7717         if (defined $file_name) {
7718                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7719         } elsif (defined $hash) {
7720                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7721         } else {
7722                 $alt_url = href(-full=>1, action=>"summary");
7723         }
7724         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7725         if ($format eq 'rss') {
7726                 print <<XML;
7727 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7728 <channel>
7729 XML
7730                 print "<title>$title</title>\n" .
7731                       "<link>$alt_url</link>\n" .
7732                       "<description>$descr</description>\n" .
7733                       "<language>en</language>\n" .
7734                       # project owner is responsible for 'editorial' content
7735                       "<managingEditor>$owner</managingEditor>\n";
7736                 if (defined $logo || defined $favicon) {
7737                         # prefer the logo to the favicon, since RSS
7738                         # doesn't allow both
7739                         my $img = esc_url($logo || $favicon);
7740                         print "<image>\n" .
7741                               "<url>$img</url>\n" .
7742                               "<title>$title</title>\n" .
7743                               "<link>$alt_url</link>\n" .
7744                               "</image>\n";
7745                 }
7746                 if (%latest_date) {
7747                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7748                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7749                 }
7750                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7751         } elsif ($format eq 'atom') {
7752                 print <<XML;
7753 <feed xmlns="http://www.w3.org/2005/Atom">
7754 XML
7755                 print "<title>$title</title>\n" .
7756                       "<subtitle>$descr</subtitle>\n" .
7757                       '<link rel="alternate" type="text/html" href="' .
7758                       $alt_url . '" />' . "\n" .
7759                       '<link rel="self" type="' . $content_type . '" href="' .
7760                       $cgi->self_url() . '" />' . "\n" .
7761                       "<id>" . href(-full=>1) . "</id>\n" .
7762                       # use project owner for feed author
7763                       "<author><name>$owner</name></author>\n";
7764                 if (defined $favicon) {
7765                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7766                 }
7767                 if (defined $logo) {
7768                         # not twice as wide as tall: 72 x 27 pixels
7769                         print "<logo>" . esc_url($logo) . "</logo>\n";
7770                 }
7771                 if (! %latest_date) {
7772                         # dummy date to keep the feed valid until commits trickle in:
7773                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7774                 } else {
7775                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7776                 }
7777                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7778         }
7779
7780         # contents
7781         for (my $i = 0; $i <= $#commitlist; $i++) {
7782                 my %co = %{$commitlist[$i]};
7783                 my $commit = $co{'id'};
7784                 # we read 150, we always show 30 and the ones more recent than 48 hours
7785                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7786                         last;
7787                 }
7788                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7789
7790                 # get list of changed files
7791                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7792                         $co{'parent'} || "--root",
7793                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7794                         or next;
7795                 my @difftree = map { chomp; $_ } <$fd>;
7796                 close $fd
7797                         or next;
7798
7799                 # print element (entry, item)
7800                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7801                 if ($format eq 'rss') {
7802                         print "<item>\n" .
7803                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7804                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7805                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7806                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7807                               "<link>$co_url</link>\n" .
7808                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7809                               "<content:encoded>" .
7810                               "<![CDATA[\n";
7811                 } elsif ($format eq 'atom') {
7812                         print "<entry>\n" .
7813                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7814                               "<updated>$cd{'iso-8601'}</updated>\n" .
7815                               "<author>\n" .
7816                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7817                         if ($co{'author_email'}) {
7818                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7819                         }
7820                         print "</author>\n" .
7821                               # use committer for contributor
7822                               "<contributor>\n" .
7823                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7824                         if ($co{'committer_email'}) {
7825                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7826                         }
7827                         print "</contributor>\n" .
7828                               "<published>$cd{'iso-8601'}</published>\n" .
7829                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7830                               "<id>$co_url</id>\n" .
7831                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7832                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7833                 }
7834                 my $comment = $co{'comment'};
7835                 print "<pre>\n";
7836                 foreach my $line (@$comment) {
7837                         $line = esc_html($line);
7838                         print "$line\n";
7839                 }
7840                 print "</pre><ul>\n";
7841                 foreach my $difftree_line (@difftree) {
7842                         my %difftree = parse_difftree_raw_line($difftree_line);
7843                         next if !$difftree{'from_id'};
7844
7845                         my $file = $difftree{'file'} || $difftree{'to_file'};
7846
7847                         print "<li>" .
7848                               "[" .
7849                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7850                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7851                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7852                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7853                                       -title => "diff"}, 'D');
7854                         if ($have_blame) {
7855                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7856                                                              file_name=>$file, hash_base=>$commit),
7857                                               -title => "blame"}, 'B');
7858                         }
7859                         # if this is not a feed of a file history
7860                         if (!defined $file_name || $file_name ne $file) {
7861                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7862                                                              file_name=>$file, hash=>$commit),
7863                                               -title => "history"}, 'H');
7864                         }
7865                         $file = esc_path($file);
7866                         print "] ".
7867                               "$file</li>\n";
7868                 }
7869                 if ($format eq 'rss') {
7870                         print "</ul>]]>\n" .
7871                               "</content:encoded>\n" .
7872                               "</item>\n";
7873                 } elsif ($format eq 'atom') {
7874                         print "</ul>\n</div>\n" .
7875                               "</content>\n" .
7876                               "</entry>\n";
7877                 }
7878         }
7879
7880         # end of feed
7881         if ($format eq 'rss') {
7882                 print "</channel>\n</rss>\n";
7883         } elsif ($format eq 'atom') {
7884                 print "</feed>\n";
7885         }
7886 }
7887
7888 sub git_rss {
7889         git_feed('rss');
7890 }
7891
7892 sub git_atom {
7893         git_feed('atom');
7894 }
7895
7896 sub git_opml {
7897         my @list = git_get_projects_list($project_filter, $strict_export);
7898         if (!@list) {
7899                 die_error(404, "No projects found");
7900         }
7901
7902         print $cgi->header(
7903                 -type => 'text/xml',
7904                 -charset => 'utf-8',
7905                 -content_disposition => 'inline; filename="opml.xml"');
7906
7907         my $title = esc_html($site_name);
7908         my $filter = " within subdirectory ";
7909         if (defined $project_filter) {
7910                 $filter .= esc_html($project_filter);
7911         } else {
7912                 $filter = "";
7913         }
7914         print <<XML;
7915 <?xml version="1.0" encoding="utf-8"?>
7916 <opml version="1.0">
7917 <head>
7918   <title>$title OPML Export$filter</title>
7919 </head>
7920 <body>
7921 <outline text="git RSS feeds">
7922 XML
7923
7924         foreach my $pr (@list) {
7925                 my %proj = %$pr;
7926                 my $head = git_get_head_hash($proj{'path'});
7927                 if (!defined $head) {
7928                         next;
7929                 }
7930                 $git_dir = "$projectroot/$proj{'path'}";
7931                 my %co = parse_commit($head);
7932                 if (!%co) {
7933                         next;
7934                 }
7935
7936                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7937                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7938                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7939                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7940         }
7941         print <<XML;
7942 </outline>
7943 </body>
7944 </opml>
7945 XML
7946 }