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 $path_info = decode_utf8($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} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = decode_utf8($cgi->param($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 = $input_params{'ctag'};
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                 my @dirname = split '/', $project;
3863                 my $projectbasename = pop @dirname;
3864                 print_nav_breadcrumbs_path(@dirname);
3865                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3866                 if (defined $action) {
3867                         my $action_print = $action ;
3868                         if (defined $opts{-action_extra}) {
3869                                 $action_print = $cgi->a({-href => href(action=>$action)},
3870                                         $action);
3871                         }
3872                         print " / $action_print";
3873                 }
3874                 if (defined $opts{-action_extra}) {
3875                         print " / $opts{-action_extra}";
3876                 }
3877                 print "\n";
3878         } elsif (defined $project_filter) {
3879                 print_nav_breadcrumbs_path(split '/', $project_filter);
3880         }
3881 }
3882
3883 sub print_search_form {
3884         if (!defined $searchtext) {
3885                 $searchtext = "";
3886         }
3887         my $search_hash;
3888         if (defined $hash_base) {
3889                 $search_hash = $hash_base;
3890         } elsif (defined $hash) {
3891                 $search_hash = $hash;
3892         } else {
3893                 $search_hash = "HEAD";
3894         }
3895         my $action = $my_uri;
3896         my $use_pathinfo = gitweb_check_feature('pathinfo');
3897         if ($use_pathinfo) {
3898                 $action .= "/".esc_url($project);
3899         }
3900         print $cgi->startform(-method => "get", -action => $action) .
3901               "<div class=\"search\">\n" .
3902               (!$use_pathinfo &&
3903               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3904               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3905               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3906               $cgi->popup_menu(-name => 'st', -default => 'commit',
3907                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3908               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3909               " search:\n",
3910               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3911               "<span title=\"Extended regular expression\">" .
3912               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3913                              -checked => $search_use_regexp) .
3914               "</span>" .
3915               "</div>" .
3916               $cgi->end_form() . "\n";
3917 }
3918
3919 sub git_header_html {
3920         my $status = shift || "200 OK";
3921         my $expires = shift;
3922         my %opts = @_;
3923
3924         my $title = get_page_title();
3925         my $content_type = get_content_type_html();
3926         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3927                            -status=> $status, -expires => $expires)
3928                 unless ($opts{'-no_http_header'});
3929         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3930         print <<EOF;
3931 <?xml version="1.0" encoding="utf-8"?>
3932 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3933 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3934 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3935 <!-- git core binaries version $git_version -->
3936 <head>
3937 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3938 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3939 <meta name="robots" content="index, nofollow"/>
3940 <title>$title</title>
3941 EOF
3942         # the stylesheet, favicon etc urls won't work correctly with path_info
3943         # unless we set the appropriate base URL
3944         if ($ENV{'PATH_INFO'}) {
3945                 print "<base href=\"".esc_url($base_url)."\" />\n";
3946         }
3947         print_header_links($status);
3948
3949         if (defined $site_html_head_string) {
3950                 print to_utf8($site_html_head_string);
3951         }
3952
3953         print "</head>\n" .
3954               "<body>\n";
3955
3956         if (defined $site_header && -f $site_header) {
3957                 insert_file($site_header);
3958         }
3959
3960         print "<div class=\"page_header\">\n";
3961         if (defined $logo) {
3962                 print $cgi->a({-href => esc_url($logo_url),
3963                                -title => $logo_label},
3964                               $cgi->img({-src => esc_url($logo),
3965                                          -width => 72, -height => 27,
3966                                          -alt => "git",
3967                                          -class => "logo"}));
3968         }
3969         print_nav_breadcrumbs(%opts);
3970         print "</div>\n";
3971
3972         my $have_search = gitweb_check_feature('search');
3973         if (defined $project && $have_search) {
3974                 print_search_form();
3975         }
3976 }
3977
3978 sub git_footer_html {
3979         my $feed_class = 'rss_logo';
3980
3981         print "<div class=\"page_footer\">\n";
3982         if (defined $project) {
3983                 my $descr = git_get_project_description($project);
3984                 if (defined $descr) {
3985                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3986                 }
3987
3988                 my %href_params = get_feed_info();
3989                 if (!%href_params) {
3990                         $feed_class .= ' generic';
3991                 }
3992                 $href_params{'-title'} ||= 'log';
3993
3994                 foreach my $format (qw(RSS Atom)) {
3995                         $href_params{'action'} = lc($format);
3996                         print $cgi->a({-href => href(%href_params),
3997                                       -title => "$href_params{'-title'} $format feed",
3998                                       -class => $feed_class}, $format)."\n";
3999                 }
4000
4001         } else {
4002                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4003                                              project_filter => $project_filter),
4004                               -class => $feed_class}, "OPML") . " ";
4005                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4006                                              project_filter => $project_filter),
4007                               -class => $feed_class}, "TXT") . "\n";
4008         }
4009         print "</div>\n"; # class="page_footer"
4010
4011         if (defined $t0 && gitweb_check_feature('timed')) {
4012                 print "<div id=\"generating_info\">\n";
4013                 print 'This page took '.
4014                       '<span id="generating_time" class="time_span">'.
4015                       tv_interval($t0, [ gettimeofday() ]).
4016                       ' seconds </span>'.
4017                       ' and '.
4018                       '<span id="generating_cmd">'.
4019                       $number_of_git_cmds.
4020                       '</span> git commands '.
4021                       " to generate.\n";
4022                 print "</div>\n"; # class="page_footer"
4023         }
4024
4025         if (defined $site_footer && -f $site_footer) {
4026                 insert_file($site_footer);
4027         }
4028
4029         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4030         if (defined $action &&
4031             $action eq 'blame_incremental') {
4032                 print qq!<script type="text/javascript">\n!.
4033                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4034                       qq!           "!. href() .qq!");\n!.
4035                       qq!</script>\n!;
4036         } else {
4037                 my ($jstimezone, $tz_cookie, $datetime_class) =
4038                         gitweb_get_feature('javascript-timezone');
4039
4040                 print qq!<script type="text/javascript">\n!.
4041                       qq!window.onload = function () {\n!;
4042                 if (gitweb_check_feature('javascript-actions')) {
4043                         print qq!       fixLinks();\n!;
4044                 }
4045                 if ($jstimezone && $tz_cookie && $datetime_class) {
4046                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4047                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4048                 }
4049                 print qq!};\n!.
4050                       qq!</script>\n!;
4051         }
4052
4053         print "</body>\n" .
4054               "</html>";
4055 }
4056
4057 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4058 # Example: die_error(404, 'Hash not found')
4059 # By convention, use the following status codes (as defined in RFC 2616):
4060 # 400: Invalid or missing CGI parameters, or
4061 #      requested object exists but has wrong type.
4062 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4063 #      this server or project.
4064 # 404: Requested object/revision/project doesn't exist.
4065 # 500: The server isn't configured properly, or
4066 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4067 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4068 # 503: The server is currently unavailable (because it is overloaded,
4069 #      or down for maintenance).  Generally, this is a temporary state.
4070 sub die_error {
4071         my $status = shift || 500;
4072         my $error = esc_html(shift) || "Internal Server Error";
4073         my $extra = shift;
4074         my %opts = @_;
4075
4076         my %http_responses = (
4077                 400 => '400 Bad Request',
4078                 403 => '403 Forbidden',
4079                 404 => '404 Not Found',
4080                 500 => '500 Internal Server Error',
4081                 503 => '503 Service Unavailable',
4082         );
4083         git_header_html($http_responses{$status}, undef, %opts);
4084         print <<EOF;
4085 <div class="page_body">
4086 <br /><br />
4087 $status - $error
4088 <br />
4089 EOF
4090         if (defined $extra) {
4091                 print "<hr />\n" .
4092                       "$extra\n";
4093         }
4094         print "</div>\n";
4095
4096         git_footer_html();
4097         goto DONE_GITWEB
4098                 unless ($opts{'-error_handler'});
4099 }
4100
4101 ## ----------------------------------------------------------------------
4102 ## functions printing or outputting HTML: navigation
4103
4104 sub git_print_page_nav {
4105         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4106         $extra = '' if !defined $extra; # pager or formats
4107
4108         my @navs = qw(summary shortlog log commit commitdiff tree);
4109         if ($suppress) {
4110                 @navs = grep { $_ ne $suppress } @navs;
4111         }
4112
4113         my %arg = map { $_ => {action=>$_} } @navs;
4114         if (defined $head) {
4115                 for (qw(commit commitdiff)) {
4116                         $arg{$_}{'hash'} = $head;
4117                 }
4118                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4119                         for (qw(shortlog log)) {
4120                                 $arg{$_}{'hash'} = $head;
4121                         }
4122                 }
4123         }
4124
4125         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4126         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4127
4128         my @actions = gitweb_get_feature('actions');
4129         my %repl = (
4130                 '%' => '%',
4131                 'n' => $project,         # project name
4132                 'f' => $git_dir,         # project path within filesystem
4133                 'h' => $treehead || '',  # current hash ('h' parameter)
4134                 'b' => $treebase || '',  # hash base ('hb' parameter)
4135         );
4136         while (@actions) {
4137                 my ($label, $link, $pos) = splice(@actions,0,3);
4138                 # insert
4139                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4140                 # munch munch
4141                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4142                 $arg{$label}{'_href'} = $link;
4143         }
4144
4145         print "<div class=\"page_nav\">\n" .
4146                 (join " | ",
4147                  map { $_ eq $current ?
4148                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4149                  } @navs);
4150         print "<br/>\n$extra<br/>\n" .
4151               "</div>\n";
4152 }
4153
4154 # returns a submenu for the nagivation of the refs views (tags, heads,
4155 # remotes) with the current view disabled and the remotes view only
4156 # available if the feature is enabled
4157 sub format_ref_views {
4158         my ($current) = @_;
4159         my @ref_views = qw{tags heads};
4160         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4161         return join " | ", map {
4162                 $_ eq $current ? $_ :
4163                 $cgi->a({-href => href(action=>$_)}, $_)
4164         } @ref_views
4165 }
4166
4167 sub format_paging_nav {
4168         my ($action, $page, $has_next_link) = @_;
4169         my $paging_nav;
4170
4171
4172         if ($page > 0) {
4173                 $paging_nav .=
4174                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4175                         " &sdot; " .
4176                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4177                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4178         } else {
4179                 $paging_nav .= "first &sdot; prev";
4180         }
4181
4182         if ($has_next_link) {
4183                 $paging_nav .= " &sdot; " .
4184                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4185                                  -accesskey => "n", -title => "Alt-n"}, "next");
4186         } else {
4187                 $paging_nav .= " &sdot; next";
4188         }
4189
4190         return $paging_nav;
4191 }
4192
4193 ## ......................................................................
4194 ## functions printing or outputting HTML: div
4195
4196 sub git_print_header_div {
4197         my ($action, $title, $hash, $hash_base) = @_;
4198         my %args = ();
4199
4200         $args{'action'} = $action;
4201         $args{'hash'} = $hash if $hash;
4202         $args{'hash_base'} = $hash_base if $hash_base;
4203
4204         print "<div class=\"header\">\n" .
4205               $cgi->a({-href => href(%args), -class => "title"},
4206               $title ? $title : $action) .
4207               "\n</div>\n";
4208 }
4209
4210 sub format_repo_url {
4211         my ($name, $url) = @_;
4212         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4213 }
4214
4215 # Group output by placing it in a DIV element and adding a header.
4216 # Options for start_div() can be provided by passing a hash reference as the
4217 # first parameter to the function.
4218 # Options to git_print_header_div() can be provided by passing an array
4219 # reference. This must follow the options to start_div if they are present.
4220 # The content can be a scalar, which is output as-is, a scalar reference, which
4221 # is output after html escaping, an IO handle passed either as *handle or
4222 # *handle{IO}, or a function reference. In the latter case all following
4223 # parameters will be taken as argument to the content function call.
4224 sub git_print_section {
4225         my ($div_args, $header_args, $content);
4226         my $arg = shift;
4227         if (ref($arg) eq 'HASH') {
4228                 $div_args = $arg;
4229                 $arg = shift;
4230         }
4231         if (ref($arg) eq 'ARRAY') {
4232                 $header_args = $arg;
4233                 $arg = shift;
4234         }
4235         $content = $arg;
4236
4237         print $cgi->start_div($div_args);
4238         git_print_header_div(@$header_args);
4239
4240         if (ref($content) eq 'CODE') {
4241                 $content->(@_);
4242         } elsif (ref($content) eq 'SCALAR') {
4243                 print esc_html($$content);
4244         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4245                 print <$content>;
4246         } elsif (!ref($content) && defined($content)) {
4247                 print $content;
4248         }
4249
4250         print $cgi->end_div;
4251 }
4252
4253 sub format_timestamp_html {
4254         my $date = shift;
4255         my $strtime = $date->{'rfc2822'};
4256
4257         my (undef, undef, $datetime_class) =
4258                 gitweb_get_feature('javascript-timezone');
4259         if ($datetime_class) {
4260                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4261         }
4262
4263         my $localtime_format = '(%02d:%02d %s)';
4264         if ($date->{'hour_local'} < 6) {
4265                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4266         }
4267         $strtime .= ' ' .
4268                     sprintf($localtime_format,
4269                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4270
4271         return $strtime;
4272 }
4273
4274 # Outputs the author name and date in long form
4275 sub git_print_authorship {
4276         my $co = shift;
4277         my %opts = @_;
4278         my $tag = $opts{-tag} || 'div';
4279         my $author = $co->{'author_name'};
4280
4281         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4282         print "<$tag class=\"author_date\">" .
4283               format_search_author($author, "author", esc_html($author)) .
4284               " [".format_timestamp_html(\%ad)."]".
4285               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4286               "</$tag>\n";
4287 }
4288
4289 # Outputs table rows containing the full author or committer information,
4290 # in the format expected for 'commit' view (& similar).
4291 # Parameters are a commit hash reference, followed by the list of people
4292 # to output information for. If the list is empty it defaults to both
4293 # author and committer.
4294 sub git_print_authorship_rows {
4295         my $co = shift;
4296         # too bad we can't use @people = @_ || ('author', 'committer')
4297         my @people = @_;
4298         @people = ('author', 'committer') unless @people;
4299         foreach my $who (@people) {
4300                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4301                 print "<tr><td>$who</td><td>" .
4302                       format_search_author($co->{"${who}_name"}, $who,
4303                                            esc_html($co->{"${who}_name"})) . " " .
4304                       format_search_author($co->{"${who}_email"}, $who,
4305                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4306                       "</td><td rowspan=\"2\">" .
4307                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4308                       "</td></tr>\n" .
4309                       "<tr>" .
4310                       "<td></td><td>" .
4311                       format_timestamp_html(\%wd) .
4312                       "</td>" .
4313                       "</tr>\n";
4314         }
4315 }
4316
4317 sub git_print_page_path {
4318         my $name = shift;
4319         my $type = shift;
4320         my $hb = shift;
4321
4322
4323         print "<div class=\"page_path\">";
4324         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4325                       -title => 'tree root'}, to_utf8("[$project]"));
4326         print " / ";
4327         if (defined $name) {
4328                 my @dirname = split '/', $name;
4329                 my $basename = pop @dirname;
4330                 my $fullname = '';
4331
4332                 foreach my $dir (@dirname) {
4333                         $fullname .= ($fullname ? '/' : '') . $dir;
4334                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4335                                                      hash_base=>$hb),
4336                                       -title => $fullname}, esc_path($dir));
4337                         print " / ";
4338                 }
4339                 if (defined $type && $type eq 'blob') {
4340                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4341                                                      hash_base=>$hb),
4342                                       -title => $name}, esc_path($basename));
4343                 } elsif (defined $type && $type eq 'tree') {
4344                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4345                                                      hash_base=>$hb),
4346                                       -title => $name}, esc_path($basename));
4347                         print " / ";
4348                 } else {
4349                         print esc_path($basename);
4350                 }
4351         }
4352         print "<br/></div>\n";
4353 }
4354
4355 sub git_print_log {
4356         my $log = shift;
4357         my %opts = @_;
4358
4359         if ($opts{'-remove_title'}) {
4360                 # remove title, i.e. first line of log
4361                 shift @$log;
4362         }
4363         # remove leading empty lines
4364         while (defined $log->[0] && $log->[0] eq "") {
4365                 shift @$log;
4366         }
4367
4368         # print log
4369         my $signoff = 0;
4370         my $empty = 0;
4371         foreach my $line (@$log) {
4372                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4373                         $signoff = 1;
4374                         $empty = 0;
4375                         if (! $opts{'-remove_signoff'}) {
4376                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4377                                 next;
4378                         } else {
4379                                 # remove signoff lines
4380                                 next;
4381                         }
4382                 } else {
4383                         $signoff = 0;
4384                 }
4385
4386                 # print only one empty line
4387                 # do not print empty line after signoff
4388                 if ($line eq "") {
4389                         next if ($empty || $signoff);
4390                         $empty = 1;
4391                 } else {
4392                         $empty = 0;
4393                 }
4394
4395                 print format_log_line_html($line) . "<br/>\n";
4396         }
4397
4398         if ($opts{'-final_empty_line'}) {
4399                 # end with single empty line
4400                 print "<br/>\n" unless $empty;
4401         }
4402 }
4403
4404 # return link target (what link points to)
4405 sub git_get_link_target {
4406         my $hash = shift;
4407         my $link_target;
4408
4409         # read link
4410         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4411                 or return;
4412         {
4413                 local $/ = undef;
4414                 $link_target = <$fd>;
4415         }
4416         close $fd
4417                 or return;
4418
4419         return $link_target;
4420 }
4421
4422 # given link target, and the directory (basedir) the link is in,
4423 # return target of link relative to top directory (top tree);
4424 # return undef if it is not possible (including absolute links).
4425 sub normalize_link_target {
4426         my ($link_target, $basedir) = @_;
4427
4428         # absolute symlinks (beginning with '/') cannot be normalized
4429         return if (substr($link_target, 0, 1) eq '/');
4430
4431         # normalize link target to path from top (root) tree (dir)
4432         my $path;
4433         if ($basedir) {
4434                 $path = $basedir . '/' . $link_target;
4435         } else {
4436                 # we are in top (root) tree (dir)
4437                 $path = $link_target;
4438         }
4439
4440         # remove //, /./, and /../
4441         my @path_parts;
4442         foreach my $part (split('/', $path)) {
4443                 # discard '.' and ''
4444                 next if (!$part || $part eq '.');
4445                 # handle '..'
4446                 if ($part eq '..') {
4447                         if (@path_parts) {
4448                                 pop @path_parts;
4449                         } else {
4450                                 # link leads outside repository (outside top dir)
4451                                 return;
4452                         }
4453                 } else {
4454                         push @path_parts, $part;
4455                 }
4456         }
4457         $path = join('/', @path_parts);
4458
4459         return $path;
4460 }
4461
4462 # print tree entry (row of git_tree), but without encompassing <tr> element
4463 sub git_print_tree_entry {
4464         my ($t, $basedir, $hash_base, $have_blame) = @_;
4465
4466         my %base_key = ();
4467         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4468
4469         # The format of a table row is: mode list link.  Where mode is
4470         # the mode of the entry, list is the name of the entry, an href,
4471         # and link is the action links of the entry.
4472
4473         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4474         if (exists $t->{'size'}) {
4475                 print "<td class=\"size\">$t->{'size'}</td>\n";
4476         }
4477         if ($t->{'type'} eq "blob") {
4478                 print "<td class=\"list\">" .
4479                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4480                                                file_name=>"$basedir$t->{'name'}", %base_key),
4481                                 -class => "list"}, esc_path($t->{'name'}));
4482                 if (S_ISLNK(oct $t->{'mode'})) {
4483                         my $link_target = git_get_link_target($t->{'hash'});
4484                         if ($link_target) {
4485                                 my $norm_target = normalize_link_target($link_target, $basedir);
4486                                 if (defined $norm_target) {
4487                                         print " -> " .
4488                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4489                                                                      file_name=>$norm_target),
4490                                                        -title => $norm_target}, esc_path($link_target));
4491                                 } else {
4492                                         print " -> " . esc_path($link_target);
4493                                 }
4494                         }
4495                 }
4496                 print "</td>\n";
4497                 print "<td class=\"link\">";
4498                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4499                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4500                               "blob");
4501                 if ($have_blame) {
4502                         print " | " .
4503                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4504                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4505                                       "blame");
4506                 }
4507                 if (defined $hash_base) {
4508                         print " | " .
4509                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4510                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4511                                       "history");
4512                 }
4513                 print " | " .
4514                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4515                                                file_name=>"$basedir$t->{'name'}")},
4516                                 "raw");
4517                 print "</td>\n";
4518
4519         } elsif ($t->{'type'} eq "tree") {
4520                 print "<td class=\"list\">";
4521                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4522                                              file_name=>"$basedir$t->{'name'}",
4523                                              %base_key)},
4524                               esc_path($t->{'name'}));
4525                 print "</td>\n";
4526                 print "<td class=\"link\">";
4527                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4528                                              file_name=>"$basedir$t->{'name'}",
4529                                              %base_key)},
4530                               "tree");
4531                 if (defined $hash_base) {
4532                         print " | " .
4533                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4534                                                      file_name=>"$basedir$t->{'name'}")},
4535                                       "history");
4536                 }
4537                 print "</td>\n";
4538         } else {
4539                 # unknown object: we can only present history for it
4540                 # (this includes 'commit' object, i.e. submodule support)
4541                 print "<td class=\"list\">" .
4542                       esc_path($t->{'name'}) .
4543                       "</td>\n";
4544                 print "<td class=\"link\">";
4545                 if (defined $hash_base) {
4546                         print $cgi->a({-href => href(action=>"history",
4547                                                      hash_base=>$hash_base,
4548                                                      file_name=>"$basedir$t->{'name'}")},
4549                                       "history");
4550                 }
4551                 print "</td>\n";
4552         }
4553 }
4554
4555 ## ......................................................................
4556 ## functions printing large fragments of HTML
4557
4558 # get pre-image filenames for merge (combined) diff
4559 sub fill_from_file_info {
4560         my ($diff, @parents) = @_;
4561
4562         $diff->{'from_file'} = [ ];
4563         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4564         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4565                 if ($diff->{'status'}[$i] eq 'R' ||
4566                     $diff->{'status'}[$i] eq 'C') {
4567                         $diff->{'from_file'}[$i] =
4568                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4569                 }
4570         }
4571
4572         return $diff;
4573 }
4574
4575 # is current raw difftree line of file deletion
4576 sub is_deleted {
4577         my $diffinfo = shift;
4578
4579         return $diffinfo->{'to_id'} eq ('0' x 40);
4580 }
4581
4582 # does patch correspond to [previous] difftree raw line
4583 # $diffinfo  - hashref of parsed raw diff format
4584 # $patchinfo - hashref of parsed patch diff format
4585 #              (the same keys as in $diffinfo)
4586 sub is_patch_split {
4587         my ($diffinfo, $patchinfo) = @_;
4588
4589         return defined $diffinfo && defined $patchinfo
4590                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4591 }
4592
4593
4594 sub git_difftree_body {
4595         my ($difftree, $hash, @parents) = @_;
4596         my ($parent) = $parents[0];
4597         my $have_blame = gitweb_check_feature('blame');
4598         print "<div class=\"list_head\">\n";
4599         if ($#{$difftree} > 10) {
4600                 print(($#{$difftree} + 1) . " files changed:\n");
4601         }
4602         print "</div>\n";
4603
4604         print "<table class=\"" .
4605               (@parents > 1 ? "combined " : "") .
4606               "diff_tree\">\n";
4607
4608         # header only for combined diff in 'commitdiff' view
4609         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4610         if ($has_header) {
4611                 # table header
4612                 print "<thead><tr>\n" .
4613                        "<th></th><th></th>\n"; # filename, patchN link
4614                 for (my $i = 0; $i < @parents; $i++) {
4615                         my $par = $parents[$i];
4616                         print "<th>" .
4617                               $cgi->a({-href => href(action=>"commitdiff",
4618                                                      hash=>$hash, hash_parent=>$par),
4619                                        -title => 'commitdiff to parent number ' .
4620                                                   ($i+1) . ': ' . substr($par,0,7)},
4621                                       $i+1) .
4622                               "&nbsp;</th>\n";
4623                 }
4624                 print "</tr></thead>\n<tbody>\n";
4625         }
4626
4627         my $alternate = 1;
4628         my $patchno = 0;
4629         foreach my $line (@{$difftree}) {
4630                 my $diff = parsed_difftree_line($line);
4631
4632                 if ($alternate) {
4633                         print "<tr class=\"dark\">\n";
4634                 } else {
4635                         print "<tr class=\"light\">\n";
4636                 }
4637                 $alternate ^= 1;
4638
4639                 if (exists $diff->{'nparents'}) { # combined diff
4640
4641                         fill_from_file_info($diff, @parents)
4642                                 unless exists $diff->{'from_file'};
4643
4644                         if (!is_deleted($diff)) {
4645                                 # file exists in the result (child) commit
4646                                 print "<td>" .
4647                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4648                                                              file_name=>$diff->{'to_file'},
4649                                                              hash_base=>$hash),
4650                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4651                                       "</td>\n";
4652                         } else {
4653                                 print "<td>" .
4654                                       esc_path($diff->{'to_file'}) .
4655                                       "</td>\n";
4656                         }
4657
4658                         if ($action eq 'commitdiff') {
4659                                 # link to patch
4660                                 $patchno++;
4661                                 print "<td class=\"link\">" .
4662                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4663                                               "patch") .
4664                                       " | " .
4665                                       "</td>\n";
4666                         }
4667
4668                         my $has_history = 0;
4669                         my $not_deleted = 0;
4670                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4671                                 my $hash_parent = $parents[$i];
4672                                 my $from_hash = $diff->{'from_id'}[$i];
4673                                 my $from_path = $diff->{'from_file'}[$i];
4674                                 my $status = $diff->{'status'}[$i];
4675
4676                                 $has_history ||= ($status ne 'A');
4677                                 $not_deleted ||= ($status ne 'D');
4678
4679                                 if ($status eq 'A') {
4680                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4681                                 } elsif ($status eq 'D') {
4682                                         print "<td class=\"link\">" .
4683                                               $cgi->a({-href => href(action=>"blob",
4684                                                                      hash_base=>$hash,
4685                                                                      hash=>$from_hash,
4686                                                                      file_name=>$from_path)},
4687                                                       "blob" . ($i+1)) .
4688                                               " | </td>\n";
4689                                 } else {
4690                                         if ($diff->{'to_id'} eq $from_hash) {
4691                                                 print "<td class=\"link nochange\">";
4692                                         } else {
4693                                                 print "<td class=\"link\">";
4694                                         }
4695                                         print $cgi->a({-href => href(action=>"blobdiff",
4696                                                                      hash=>$diff->{'to_id'},
4697                                                                      hash_parent=>$from_hash,
4698                                                                      hash_base=>$hash,
4699                                                                      hash_parent_base=>$hash_parent,
4700                                                                      file_name=>$diff->{'to_file'},
4701                                                                      file_parent=>$from_path)},
4702                                                       "diff" . ($i+1)) .
4703                                               " | </td>\n";
4704                                 }
4705                         }
4706
4707                         print "<td class=\"link\">";
4708                         if ($not_deleted) {
4709                                 print $cgi->a({-href => href(action=>"blob",
4710                                                              hash=>$diff->{'to_id'},
4711                                                              file_name=>$diff->{'to_file'},
4712                                                              hash_base=>$hash)},
4713                                               "blob");
4714                                 print " | " if ($has_history);
4715                         }
4716                         if ($has_history) {
4717                                 print $cgi->a({-href => href(action=>"history",
4718                                                              file_name=>$diff->{'to_file'},
4719                                                              hash_base=>$hash)},
4720                                               "history");
4721                         }
4722                         print "</td>\n";
4723
4724                         print "</tr>\n";
4725                         next; # instead of 'else' clause, to avoid extra indent
4726                 }
4727                 # else ordinary diff
4728
4729                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4730                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4731                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4732                         $to_mode_oct = oct $diff->{'to_mode'};
4733                         if (S_ISREG($to_mode_oct)) { # only for regular file
4734                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4735                         }
4736                         $to_file_type = file_type($diff->{'to_mode'});
4737                 }
4738                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4739                         $from_mode_oct = oct $diff->{'from_mode'};
4740                         if (S_ISREG($from_mode_oct)) { # only for regular file
4741                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4742                         }
4743                         $from_file_type = file_type($diff->{'from_mode'});
4744                 }
4745
4746                 if ($diff->{'status'} eq "A") { # created
4747                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4748                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4749                         $mode_chng   .= "]</span>";
4750                         print "<td>";
4751                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4752                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4753                                       -class => "list"}, esc_path($diff->{'file'}));
4754                         print "</td>\n";
4755                         print "<td>$mode_chng</td>\n";
4756                         print "<td class=\"link\">";
4757                         if ($action eq 'commitdiff') {
4758                                 # link to patch
4759                                 $patchno++;
4760                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4761                                               "patch") .
4762                                       " | ";
4763                         }
4764                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4765                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4766                                       "blob");
4767                         print "</td>\n";
4768
4769                 } elsif ($diff->{'status'} eq "D") { # deleted
4770                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4771                         print "<td>";
4772                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4773                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4774                                        -class => "list"}, esc_path($diff->{'file'}));
4775                         print "</td>\n";
4776                         print "<td>$mode_chng</td>\n";
4777                         print "<td class=\"link\">";
4778                         if ($action eq 'commitdiff') {
4779                                 # link to patch
4780                                 $patchno++;
4781                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4782                                               "patch") .
4783                                       " | ";
4784                         }
4785                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4786                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4787                                       "blob") . " | ";
4788                         if ($have_blame) {
4789                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4790                                                              file_name=>$diff->{'file'})},
4791                                               "blame") . " | ";
4792                         }
4793                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4794                                                      file_name=>$diff->{'file'})},
4795                                       "history");
4796                         print "</td>\n";
4797
4798                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4799                         my $mode_chnge = "";
4800                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4801                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4802                                 if ($from_file_type ne $to_file_type) {
4803                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4804                                 }
4805                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4806                                         if ($from_mode_str && $to_mode_str) {
4807                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4808                                         } elsif ($to_mode_str) {
4809                                                 $mode_chnge .= " mode: $to_mode_str";
4810                                         }
4811                                 }
4812                                 $mode_chnge .= "]</span>\n";
4813                         }
4814                         print "<td>";
4815                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4816                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4817                                       -class => "list"}, esc_path($diff->{'file'}));
4818                         print "</td>\n";
4819                         print "<td>$mode_chnge</td>\n";
4820                         print "<td class=\"link\">";
4821                         if ($action eq 'commitdiff') {
4822                                 # link to patch
4823                                 $patchno++;
4824                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4825                                               "patch") .
4826                                       " | ";
4827                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4828                                 # "commit" view and modified file (not onlu mode changed)
4829                                 print $cgi->a({-href => href(action=>"blobdiff",
4830                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4831                                                              hash_base=>$hash, hash_parent_base=>$parent,
4832                                                              file_name=>$diff->{'file'})},
4833                                               "diff") .
4834                                       " | ";
4835                         }
4836                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4837                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4838                                        "blob") . " | ";
4839                         if ($have_blame) {
4840                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4841                                                              file_name=>$diff->{'file'})},
4842                                               "blame") . " | ";
4843                         }
4844                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4845                                                      file_name=>$diff->{'file'})},
4846                                       "history");
4847                         print "</td>\n";
4848
4849                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4850                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4851                         my $nstatus = $status_name{$diff->{'status'}};
4852                         my $mode_chng = "";
4853                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4854                                 # mode also for directories, so we cannot use $to_mode_str
4855                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4856                         }
4857                         print "<td>" .
4858                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4859                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4860                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4861                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4862                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4863                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4864                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4865                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4866                               "<td class=\"link\">";
4867                         if ($action eq 'commitdiff') {
4868                                 # link to patch
4869                                 $patchno++;
4870                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4871                                               "patch") .
4872                                       " | ";
4873                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4874                                 # "commit" view and modified file (not only pure rename or copy)
4875                                 print $cgi->a({-href => href(action=>"blobdiff",
4876                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4877                                                              hash_base=>$hash, hash_parent_base=>$parent,
4878                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4879                                               "diff") .
4880                                       " | ";
4881                         }
4882                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4883                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4884                                       "blob") . " | ";
4885                         if ($have_blame) {
4886                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4887                                                              file_name=>$diff->{'to_file'})},
4888                                               "blame") . " | ";
4889                         }
4890                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4891                                                     file_name=>$diff->{'to_file'})},
4892                                       "history");
4893                         print "</td>\n";
4894
4895                 } # we should not encounter Unmerged (U) or Unknown (X) status
4896                 print "</tr>\n";
4897         }
4898         print "</tbody>" if $has_header;
4899         print "</table>\n";
4900 }
4901
4902 sub print_sidebyside_diff_chunk {
4903         my @chunk = @_;
4904         my (@ctx, @rem, @add);
4905
4906         return unless @chunk;
4907
4908         # incomplete last line might be among removed or added lines,
4909         # or both, or among context lines: find which
4910         for (my $i = 1; $i < @chunk; $i++) {
4911                 if ($chunk[$i][0] eq 'incomplete') {
4912                         $chunk[$i][0] = $chunk[$i-1][0];
4913                 }
4914         }
4915
4916         # guardian
4917         push @chunk, ["", ""];
4918
4919         foreach my $line_info (@chunk) {
4920                 my ($class, $line) = @$line_info;
4921
4922                 # print chunk headers
4923                 if ($class && $class eq 'chunk_header') {
4924                         print $line;
4925                         next;
4926                 }
4927
4928                 ## print from accumulator when type of class of lines change
4929                 # empty contents block on start rem/add block, or end of chunk
4930                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4931                         print join '',
4932                                 '<div class="chunk_block ctx">',
4933                                         '<div class="old">',
4934                                         @ctx,
4935                                         '</div>',
4936                                         '<div class="new">',
4937                                         @ctx,
4938                                         '</div>',
4939                                 '</div>';
4940                         @ctx = ();
4941                 }
4942                 # empty add/rem block on start context block, or end of chunk
4943                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4944                         if (!@add) {
4945                                 # pure removal
4946                                 print join '',
4947                                         '<div class="chunk_block rem">',
4948                                                 '<div class="old">',
4949                                                 @rem,
4950                                                 '</div>',
4951                                         '</div>';
4952                         } elsif (!@rem) {
4953                                 # pure addition
4954                                 print join '',
4955                                         '<div class="chunk_block add">',
4956                                                 '<div class="new">',
4957                                                 @add,
4958                                                 '</div>',
4959                                         '</div>';
4960                         } else {
4961                                 # assume that it is change
4962                                 print join '',
4963                                         '<div class="chunk_block chg">',
4964                                                 '<div class="old">',
4965                                                 @rem,
4966                                                 '</div>',
4967                                                 '<div class="new">',
4968                                                 @add,
4969                                                 '</div>',
4970                                         '</div>';
4971                         }
4972                         @rem = @add = ();
4973                 }
4974
4975                 ## adding lines to accumulator
4976                 # guardian value
4977                 last unless $line;
4978                 # rem, add or change
4979                 if ($class eq 'rem') {
4980                         push @rem, $line;
4981                 } elsif ($class eq 'add') {
4982                         push @add, $line;
4983                 }
4984                 # context line
4985                 if ($class eq 'ctx') {
4986                         push @ctx, $line;
4987                 }
4988         }
4989 }
4990
4991 sub git_patchset_body {
4992         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4993         my ($hash_parent) = $hash_parents[0];
4994
4995         my $is_combined = (@hash_parents > 1);
4996         my $patch_idx = 0;
4997         my $patch_number = 0;
4998         my $patch_line;
4999         my $diffinfo;
5000         my $to_name;
5001         my (%from, %to);
5002         my @chunk; # for side-by-side diff
5003
5004         print "<div class=\"patchset\">\n";
5005
5006         # skip to first patch
5007         while ($patch_line = <$fd>) {
5008                 chomp $patch_line;
5009
5010                 last if ($patch_line =~ m/^diff /);
5011         }
5012
5013  PATCH:
5014         while ($patch_line) {
5015
5016                 # parse "git diff" header line
5017                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5018                         # $1 is from_name, which we do not use
5019                         $to_name = unquote($2);
5020                         $to_name =~ s!^b/!!;
5021                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5022                         # $1 is 'cc' or 'combined', which we do not use
5023                         $to_name = unquote($2);
5024                 } else {
5025                         $to_name = undef;
5026                 }
5027
5028                 # check if current patch belong to current raw line
5029                 # and parse raw git-diff line if needed
5030                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5031                         # this is continuation of a split patch
5032                         print "<div class=\"patch cont\">\n";
5033                 } else {
5034                         # advance raw git-diff output if needed
5035                         $patch_idx++ if defined $diffinfo;
5036
5037                         # read and prepare patch information
5038                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5039
5040                         # compact combined diff output can have some patches skipped
5041                         # find which patch (using pathname of result) we are at now;
5042                         if ($is_combined) {
5043                                 while ($to_name ne $diffinfo->{'to_file'}) {
5044                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5045                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5046                                               "</div>\n";  # class="patch"
5047
5048                                         $patch_idx++;
5049                                         $patch_number++;
5050
5051                                         last if $patch_idx > $#$difftree;
5052                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5053                                 }
5054                         }
5055
5056                         # modifies %from, %to hashes
5057                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5058
5059                         # this is first patch for raw difftree line with $patch_idx index
5060                         # we index @$difftree array from 0, but number patches from 1
5061                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5062                 }
5063
5064                 # git diff header
5065                 #assert($patch_line =~ m/^diff /) if DEBUG;
5066                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5067                 $patch_number++;
5068                 # print "git diff" header
5069                 print format_git_diff_header_line($patch_line, $diffinfo,
5070                                                   \%from, \%to);
5071
5072                 # print extended diff header
5073                 print "<div class=\"diff extended_header\">\n";
5074         EXTENDED_HEADER:
5075                 while ($patch_line = <$fd>) {
5076                         chomp $patch_line;
5077
5078                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5079
5080                         print format_extended_diff_header_line($patch_line, $diffinfo,
5081                                                                \%from, \%to);
5082                 }
5083                 print "</div>\n"; # class="diff extended_header"
5084
5085                 # from-file/to-file diff header
5086                 if (! $patch_line) {
5087                         print "</div>\n"; # class="patch"
5088                         last PATCH;
5089                 }
5090                 next PATCH if ($patch_line =~ m/^diff /);
5091                 #assert($patch_line =~ m/^---/) if DEBUG;
5092
5093                 my $last_patch_line = $patch_line;
5094                 $patch_line = <$fd>;
5095                 chomp $patch_line;
5096                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5097
5098                 print format_diff_from_to_header($last_patch_line, $patch_line,
5099                                                  $diffinfo, \%from, \%to,
5100                                                  @hash_parents);
5101
5102                 # the patch itself
5103         LINE:
5104                 while ($patch_line = <$fd>) {
5105                         chomp $patch_line;
5106
5107                         next PATCH if ($patch_line =~ m/^diff /);
5108
5109                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5110                         my $diff_classes = "diff";
5111                         $diff_classes .= " $class" if ($class);
5112                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5113
5114                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5115                                 if ($class eq 'chunk_header') {
5116                                         print_sidebyside_diff_chunk(@chunk);
5117                                         @chunk = ( [ $class, $line ] );
5118                                 } else {
5119                                         push @chunk, [ $class, $line ];
5120                                 }
5121                         } else {
5122                                 # default 'inline' style and unknown styles
5123                                 print $line;
5124                         }
5125                 }
5126
5127         } continue {
5128                 if (@chunk) {
5129                         print_sidebyside_diff_chunk(@chunk);
5130                         @chunk = ();
5131                 }
5132                 print "</div>\n"; # class="patch"
5133         }
5134
5135         # for compact combined (--cc) format, with chunk and patch simplification
5136         # the patchset might be empty, but there might be unprocessed raw lines
5137         for (++$patch_idx if $patch_number > 0;
5138              $patch_idx < @$difftree;
5139              ++$patch_idx) {
5140                 # read and prepare patch information
5141                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5142
5143                 # generate anchor for "patch" links in difftree / whatchanged part
5144                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5145                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5146                       "</div>\n";  # class="patch"
5147
5148                 $patch_number++;
5149         }
5150
5151         if ($patch_number == 0) {
5152                 if (@hash_parents > 1) {
5153                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5154                 } else {
5155                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5156                 }
5157         }
5158
5159         print "</div>\n"; # class="patchset"
5160 }
5161
5162 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5163
5164 sub git_project_search_form {
5165         my ($searchtext, $search_use_regexp);
5166
5167         my $limit = '';
5168         if ($project_filter) {
5169                 $limit = " in '$project_filter/'";
5170         }
5171
5172         print "<div class=\"projsearch\">\n";
5173         print $cgi->startform(-method => 'get', -action => $my_uri) .
5174               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5175         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5176                 if (defined $project_filter);
5177         print $cgi->textfield(-name => 's', -value => $searchtext,
5178                               -title => "Search project by name and description$limit",
5179                               -size => 60) . "\n" .
5180               "<span title=\"Extended regular expression\">" .
5181               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5182                              -checked => $search_use_regexp) .
5183               "</span>\n" .
5184               $cgi->submit(-name => 'btnS', -value => 'Search') .
5185               $cgi->end_form() . "\n" .
5186               $cgi->a({-href => href(project => undef, searchtext => undef,
5187                                      project_filter => $project_filter)},
5188                       esc_html("List all projects$limit")) . "<br />\n";
5189         print "</div>\n";
5190 }
5191
5192 # fills project list info (age, description, owner, category, forks)
5193 # for each project in the list, removing invalid projects from
5194 # returned list
5195 # NOTE: modifies $projlist, but does not remove entries from it
5196 sub fill_project_list_info {
5197         my $projlist = shift;
5198         my @projects;
5199
5200         my $show_ctags = gitweb_check_feature('ctags');
5201  PROJECT:
5202         foreach my $pr (@$projlist) {
5203                 my (@activity) = git_get_last_activity($pr->{'path'});
5204                 unless (@activity) {
5205                         next PROJECT;
5206                 }
5207                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5208                 if (!defined $pr->{'descr'}) {
5209                         my $descr = git_get_project_description($pr->{'path'}) || "";
5210                         $descr = to_utf8($descr);
5211                         $pr->{'descr_long'} = $descr;
5212                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5213                 }
5214                 if (!defined $pr->{'owner'}) {
5215                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5216                 }
5217                 if ($show_ctags) {
5218                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5219                 }
5220                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5221                         my $cat = git_get_project_category($pr->{'path'}) ||
5222                                                            $project_list_default_category;
5223                         $pr->{'category'} = to_utf8($cat);
5224                 }
5225
5226                 push @projects, $pr;
5227         }
5228
5229         return @projects;
5230 }
5231
5232 sub sort_projects_list {
5233         my ($projlist, $order) = @_;
5234         my @projects;
5235
5236         my %order_info = (
5237                 project => { key => 'path', type => 'str' },
5238                 descr => { key => 'descr_long', type => 'str' },
5239                 owner => { key => 'owner', type => 'str' },
5240                 age => { key => 'age', type => 'num' }
5241         );
5242         my $oi = $order_info{$order};
5243         return @$projlist unless defined $oi;
5244         if ($oi->{'type'} eq 'str') {
5245                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5246         } else {
5247                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5248         }
5249
5250         return @projects;
5251 }
5252
5253 # returns a hash of categories, containing the list of project
5254 # belonging to each category
5255 sub build_projlist_by_category {
5256         my ($projlist, $from, $to) = @_;
5257         my %categories;
5258
5259         $from = 0 unless defined $from;
5260         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5261
5262         for (my $i = $from; $i <= $to; $i++) {
5263                 my $pr = $projlist->[$i];
5264                 push @{$categories{ $pr->{'category'} }}, $pr;
5265         }
5266
5267         return wantarray ? %categories : \%categories;
5268 }
5269
5270 # print 'sort by' <th> element, generating 'sort by $name' replay link
5271 # if that order is not selected
5272 sub print_sort_th {
5273         print format_sort_th(@_);
5274 }
5275
5276 sub format_sort_th {
5277         my ($name, $order, $header) = @_;
5278         my $sort_th = "";
5279         $header ||= ucfirst($name);
5280
5281         if ($order eq $name) {
5282                 $sort_th .= "<th>$header</th>\n";
5283         } else {
5284                 $sort_th .= "<th>" .
5285                             $cgi->a({-href => href(-replay=>1, order=>$name),
5286                                      -class => "header"}, $header) .
5287                             "</th>\n";
5288         }
5289
5290         return $sort_th;
5291 }
5292
5293 sub git_project_list_rows {
5294         my ($projlist, $from, $to, $check_forks) = @_;
5295
5296         $from = 0 unless defined $from;
5297         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5298
5299         my $alternate = 1;
5300         for (my $i = $from; $i <= $to; $i++) {
5301                 my $pr = $projlist->[$i];
5302
5303                 if ($alternate) {
5304                         print "<tr class=\"dark\">\n";
5305                 } else {
5306                         print "<tr class=\"light\">\n";
5307                 }
5308                 $alternate ^= 1;
5309
5310                 if ($check_forks) {
5311                         print "<td>";
5312                         if ($pr->{'forks'}) {
5313                                 my $nforks = scalar @{$pr->{'forks'}};
5314                                 if ($nforks > 0) {
5315                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5316                                                        -title => "$nforks forks"}, "+");
5317                                 } else {
5318                                         print $cgi->span({-title => "$nforks forks"}, "+");
5319                                 }
5320                         }
5321                         print "</td>\n";
5322                 }
5323                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5324                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5325                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5326                                         -class => "list", -title => $pr->{'descr_long'}},
5327                                         esc_html($pr->{'descr'})) . "</td>\n" .
5328                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5329                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5330                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5331                       "<td class=\"link\">" .
5332                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5333                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5334                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5335                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5336                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5337                       "</td>\n" .
5338                       "</tr>\n";
5339         }
5340 }
5341
5342 sub git_project_list_body {
5343         # actually uses global variable $project
5344         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5345         my @projects = @$projlist;
5346
5347         my $check_forks = gitweb_check_feature('forks');
5348         my $show_ctags  = gitweb_check_feature('ctags');
5349         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5350         $check_forks = undef
5351                 if ($tagfilter || $searchtext);
5352
5353         # filtering out forks before filling info allows to do less work
5354         @projects = filter_forks_from_projects_list(\@projects)
5355                 if ($check_forks);
5356         @projects = fill_project_list_info(\@projects);
5357         # searching projects require filling to be run before it
5358         @projects = search_projects_list(\@projects,
5359                                          'searchtext' => $searchtext,
5360                                          'tagfilter'  => $tagfilter)
5361                 if ($tagfilter || $searchtext);
5362
5363         $order ||= $default_projects_order;
5364         $from = 0 unless defined $from;
5365         $to = $#projects if (!defined $to || $#projects < $to);
5366
5367         # short circuit
5368         if ($from > $to) {
5369                 print "<center>\n".
5370                       "<b>No such projects found</b><br />\n".
5371                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5372                       "</center>\n<br />\n";
5373                 return;
5374         }
5375
5376         @projects = sort_projects_list(\@projects, $order);
5377
5378         if ($show_ctags) {
5379                 my $ctags = git_gather_all_ctags(\@projects);
5380                 my $cloud = git_populate_project_tagcloud($ctags);
5381                 print git_show_project_tagcloud($cloud, 64);
5382         }
5383
5384         print "<table class=\"project_list\">\n";
5385         unless ($no_header) {
5386                 print "<tr>\n";
5387                 if ($check_forks) {
5388                         print "<th></th>\n";
5389                 }
5390                 print_sort_th('project', $order, 'Project');
5391                 print_sort_th('descr', $order, 'Description');
5392                 print_sort_th('owner', $order, 'Owner');
5393                 print_sort_th('age', $order, 'Last Change');
5394                 print "<th></th>\n" . # for links
5395                       "</tr>\n";
5396         }
5397
5398         if ($projects_list_group_categories) {
5399                 # only display categories with projects in the $from-$to window
5400                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5401                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5402                 foreach my $cat (sort keys %categories) {
5403                         unless ($cat eq "") {
5404                                 print "<tr>\n";
5405                                 if ($check_forks) {
5406                                         print "<td></td>\n";
5407                                 }
5408                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5409                                 print "</tr>\n";
5410                         }
5411
5412                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5413                 }
5414         } else {
5415                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5416         }
5417
5418         if (defined $extra) {
5419                 print "<tr>\n";
5420                 if ($check_forks) {
5421                         print "<td></td>\n";
5422                 }
5423                 print "<td colspan=\"5\">$extra</td>\n" .
5424                       "</tr>\n";
5425         }
5426         print "</table>\n";
5427 }
5428
5429 sub git_log_body {
5430         # uses global variable $project
5431         my ($commitlist, $from, $to, $refs, $extra) = @_;
5432
5433         $from = 0 unless defined $from;
5434         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5435
5436         for (my $i = 0; $i <= $to; $i++) {
5437                 my %co = %{$commitlist->[$i]};
5438                 next if !%co;
5439                 my $commit = $co{'id'};
5440                 my $ref = format_ref_marker($refs, $commit);
5441                 git_print_header_div('commit',
5442                                "<span class=\"age\">$co{'age_string'}</span>" .
5443                                esc_html($co{'title'}) . $ref,
5444                                $commit);
5445                 print "<div class=\"title_text\">\n" .
5446                       "<div class=\"log_link\">\n" .
5447                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5448                       " | " .
5449                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5450                       " | " .
5451                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5452                       "<br/>\n" .
5453                       "</div>\n";
5454                       git_print_authorship(\%co, -tag => 'span');
5455                       print "<br/>\n</div>\n";
5456
5457                 print "<div class=\"log_body\">\n";
5458                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5459                 print "</div>\n";
5460         }
5461         if ($extra) {
5462                 print "<div class=\"page_nav\">\n";
5463                 print "$extra\n";
5464                 print "</div>\n";
5465         }
5466 }
5467
5468 sub git_shortlog_body {
5469         # uses global variable $project
5470         my ($commitlist, $from, $to, $refs, $extra) = @_;
5471
5472         $from = 0 unless defined $from;
5473         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5474
5475         print "<table class=\"shortlog\">\n";
5476         my $alternate = 1;
5477         for (my $i = $from; $i <= $to; $i++) {
5478                 my %co = %{$commitlist->[$i]};
5479                 my $commit = $co{'id'};
5480                 my $ref = format_ref_marker($refs, $commit);
5481                 if ($alternate) {
5482                         print "<tr class=\"dark\">\n";
5483                 } else {
5484                         print "<tr class=\"light\">\n";
5485                 }
5486                 $alternate ^= 1;
5487                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5488                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5489                       format_author_html('td', \%co, 10) . "<td>";
5490                 print format_subject_html($co{'title'}, $co{'title_short'},
5491                                           href(action=>"commit", hash=>$commit), $ref);
5492                 print "</td>\n" .
5493                       "<td class=\"link\">" .
5494                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5495                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5496                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5497                 my $snapshot_links = format_snapshot_links($commit);
5498                 if (defined $snapshot_links) {
5499                         print " | " . $snapshot_links;
5500                 }
5501                 print "</td>\n" .
5502                       "</tr>\n";
5503         }
5504         if (defined $extra) {
5505                 print "<tr>\n" .
5506                       "<td colspan=\"4\">$extra</td>\n" .
5507                       "</tr>\n";
5508         }
5509         print "</table>\n";
5510 }
5511
5512 sub git_history_body {
5513         # Warning: assumes constant type (blob or tree) during history
5514         my ($commitlist, $from, $to, $refs, $extra,
5515             $file_name, $file_hash, $ftype) = @_;
5516
5517         $from = 0 unless defined $from;
5518         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5519
5520         print "<table class=\"history\">\n";
5521         my $alternate = 1;
5522         for (my $i = $from; $i <= $to; $i++) {
5523                 my %co = %{$commitlist->[$i]};
5524                 if (!%co) {
5525                         next;
5526                 }
5527                 my $commit = $co{'id'};
5528
5529                 my $ref = format_ref_marker($refs, $commit);
5530
5531                 if ($alternate) {
5532                         print "<tr class=\"dark\">\n";
5533                 } else {
5534                         print "<tr class=\"light\">\n";
5535                 }
5536                 $alternate ^= 1;
5537                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5538         # shortlog:   format_author_html('td', \%co, 10)
5539                       format_author_html('td', \%co, 15, 3) . "<td>";
5540                 # originally git_history used chop_str($co{'title'}, 50)
5541                 print format_subject_html($co{'title'}, $co{'title_short'},
5542                                           href(action=>"commit", hash=>$commit), $ref);
5543                 print "</td>\n" .
5544                       "<td class=\"link\">" .
5545                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5546                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5547
5548                 if ($ftype eq 'blob') {
5549                         my $blob_current = $file_hash;
5550                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5551                         if (defined $blob_current && defined $blob_parent &&
5552                                         $blob_current ne $blob_parent) {
5553                                 print " | " .
5554                                         $cgi->a({-href => href(action=>"blobdiff",
5555                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5556                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5557                                                                file_name=>$file_name)},
5558                                                 "diff to current");
5559                         }
5560                 }
5561                 print "</td>\n" .
5562                       "</tr>\n";
5563         }
5564         if (defined $extra) {
5565                 print "<tr>\n" .
5566                       "<td colspan=\"4\">$extra</td>\n" .
5567                       "</tr>\n";
5568         }
5569         print "</table>\n";
5570 }
5571
5572 sub git_tags_body {
5573         # uses global variable $project
5574         my ($taglist, $from, $to, $extra) = @_;
5575         $from = 0 unless defined $from;
5576         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5577
5578         print "<table class=\"tags\">\n";
5579         my $alternate = 1;
5580         for (my $i = $from; $i <= $to; $i++) {
5581                 my $entry = $taglist->[$i];
5582                 my %tag = %$entry;
5583                 my $comment = $tag{'subject'};
5584                 my $comment_short;
5585                 if (defined $comment) {
5586                         $comment_short = chop_str($comment, 30, 5);
5587                 }
5588                 if ($alternate) {
5589                         print "<tr class=\"dark\">\n";
5590                 } else {
5591                         print "<tr class=\"light\">\n";
5592                 }
5593                 $alternate ^= 1;
5594                 if (defined $tag{'age'}) {
5595                         print "<td><i>$tag{'age'}</i></td>\n";
5596                 } else {
5597                         print "<td></td>\n";
5598                 }
5599                 print "<td>" .
5600                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5601                                -class => "list name"}, esc_html($tag{'name'})) .
5602                       "</td>\n" .
5603                       "<td>";
5604                 if (defined $comment) {
5605                         print format_subject_html($comment, $comment_short,
5606                                                   href(action=>"tag", hash=>$tag{'id'}));
5607                 }
5608                 print "</td>\n" .
5609                       "<td class=\"selflink\">";
5610                 if ($tag{'type'} eq "tag") {
5611                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5612                 } else {
5613                         print "&nbsp;";
5614                 }
5615                 print "</td>\n" .
5616                       "<td class=\"link\">" . " | " .
5617                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5618                 if ($tag{'reftype'} eq "commit") {
5619                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5620                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5621                 } elsif ($tag{'reftype'} eq "blob") {
5622                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5623                 }
5624                 print "</td>\n" .
5625                       "</tr>";
5626         }
5627         if (defined $extra) {
5628                 print "<tr>\n" .
5629                       "<td colspan=\"5\">$extra</td>\n" .
5630                       "</tr>\n";
5631         }
5632         print "</table>\n";
5633 }
5634
5635 sub git_heads_body {
5636         # uses global variable $project
5637         my ($headlist, $head, $from, $to, $extra) = @_;
5638         $from = 0 unless defined $from;
5639         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5640
5641         print "<table class=\"heads\">\n";
5642         my $alternate = 1;
5643         for (my $i = $from; $i <= $to; $i++) {
5644                 my $entry = $headlist->[$i];
5645                 my %ref = %$entry;
5646                 my $curr = $ref{'id'} eq $head;
5647                 if ($alternate) {
5648                         print "<tr class=\"dark\">\n";
5649                 } else {
5650                         print "<tr class=\"light\">\n";
5651                 }
5652                 $alternate ^= 1;
5653                 print "<td><i>$ref{'age'}</i></td>\n" .
5654                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5655                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5656                                -class => "list name"},esc_html($ref{'name'})) .
5657                       "</td>\n" .
5658                       "<td class=\"link\">" .
5659                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5660                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5661                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5662                       "</td>\n" .
5663                       "</tr>";
5664         }
5665         if (defined $extra) {
5666                 print "<tr>\n" .
5667                       "<td colspan=\"3\">$extra</td>\n" .
5668                       "</tr>\n";
5669         }
5670         print "</table>\n";
5671 }
5672
5673 # Display a single remote block
5674 sub git_remote_block {
5675         my ($remote, $rdata, $limit, $head) = @_;
5676
5677         my $heads = $rdata->{'heads'};
5678         my $fetch = $rdata->{'fetch'};
5679         my $push = $rdata->{'push'};
5680
5681         my $urls_table = "<table class=\"projects_list\">\n" ;
5682
5683         if (defined $fetch) {
5684                 if ($fetch eq $push) {
5685                         $urls_table .= format_repo_url("URL", $fetch);
5686                 } else {
5687                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5688                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5689                 }
5690         } elsif (defined $push) {
5691                 $urls_table .= format_repo_url("Push URL", $push);
5692         } else {
5693                 $urls_table .= format_repo_url("", "No remote URL");
5694         }
5695
5696         $urls_table .= "</table>\n";
5697
5698         my $dots;
5699         if (defined $limit && $limit < @$heads) {
5700                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5701         }
5702
5703         print $urls_table;
5704         git_heads_body($heads, $head, 0, $limit, $dots);
5705 }
5706
5707 # Display a list of remote names with the respective fetch and push URLs
5708 sub git_remotes_list {
5709         my ($remotedata, $limit) = @_;
5710         print "<table class=\"heads\">\n";
5711         my $alternate = 1;
5712         my @remotes = sort keys %$remotedata;
5713
5714         my $limited = $limit && $limit < @remotes;
5715
5716         $#remotes = $limit - 1 if $limited;
5717
5718         while (my $remote = shift @remotes) {
5719                 my $rdata = $remotedata->{$remote};
5720                 my $fetch = $rdata->{'fetch'};
5721                 my $push = $rdata->{'push'};
5722                 if ($alternate) {
5723                         print "<tr class=\"dark\">\n";
5724                 } else {
5725                         print "<tr class=\"light\">\n";
5726                 }
5727                 $alternate ^= 1;
5728                 print "<td>" .
5729                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5730                                -class=> "list name"},esc_html($remote)) .
5731                       "</td>";
5732                 print "<td class=\"link\">" .
5733                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5734                       " | " .
5735                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5736                       "</td>";
5737
5738                 print "</tr>\n";
5739         }
5740
5741         if ($limited) {
5742                 print "<tr>\n" .
5743                       "<td colspan=\"3\">" .
5744                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5745                       "</td>\n" . "</tr>\n";
5746         }
5747
5748         print "</table>";
5749 }
5750
5751 # Display remote heads grouped by remote, unless there are too many
5752 # remotes, in which case we only display the remote names
5753 sub git_remotes_body {
5754         my ($remotedata, $limit, $head) = @_;
5755         if ($limit and $limit < keys %$remotedata) {
5756                 git_remotes_list($remotedata, $limit);
5757         } else {
5758                 fill_remote_heads($remotedata);
5759                 while (my ($remote, $rdata) = each %$remotedata) {
5760                         git_print_section({-class=>"remote", -id=>$remote},
5761                                 ["remotes", $remote, $remote], sub {
5762                                         git_remote_block($remote, $rdata, $limit, $head);
5763                                 });
5764                 }
5765         }
5766 }
5767
5768 sub git_search_message {
5769         my %co = @_;
5770
5771         my $greptype;
5772         if ($searchtype eq 'commit') {
5773                 $greptype = "--grep=";
5774         } elsif ($searchtype eq 'author') {
5775                 $greptype = "--author=";
5776         } elsif ($searchtype eq 'committer') {
5777                 $greptype = "--committer=";
5778         }
5779         $greptype .= $searchtext;
5780         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5781                                        $greptype, '--regexp-ignore-case',
5782                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5783
5784         my $paging_nav = '';
5785         if ($page > 0) {
5786                 $paging_nav .=
5787                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5788                                 "first") .
5789                         " &sdot; " .
5790                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5791                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5792         } else {
5793                 $paging_nav .= "first &sdot; prev";
5794         }
5795         my $next_link = '';
5796         if ($#commitlist >= 100) {
5797                 $next_link =
5798                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5799                                  -accesskey => "n", -title => "Alt-n"}, "next");
5800                 $paging_nav .= " &sdot; $next_link";
5801         } else {
5802                 $paging_nav .= " &sdot; next";
5803         }
5804
5805         git_header_html();
5806
5807         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5808         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5809         if ($page == 0 && !@commitlist) {
5810                 print "<p>No match.</p>\n";
5811         } else {
5812                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5813         }
5814
5815         git_footer_html();
5816 }
5817
5818 sub git_search_changes {
5819         my %co = @_;
5820
5821         local $/ = "\n";
5822         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5823                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5824                 ($search_use_regexp ? '--pickaxe-regex' : ())
5825                         or die_error(500, "Open git-log failed");
5826
5827         git_header_html();
5828
5829         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5830         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5831
5832         print "<table class=\"pickaxe search\">\n";
5833         my $alternate = 1;
5834         undef %co;
5835         my @files;
5836         while (my $line = <$fd>) {
5837                 chomp $line;
5838                 next unless $line;
5839
5840                 my %set = parse_difftree_raw_line($line);
5841                 if (defined $set{'commit'}) {
5842                         # finish previous commit
5843                         if (%co) {
5844                                 print "</td>\n" .
5845                                       "<td class=\"link\">" .
5846                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5847                                               "commit") .
5848                                       " | " .
5849                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5850                                                              hash_base=>$co{'id'})},
5851                                               "tree") .
5852                                       "</td>\n" .
5853                                       "</tr>\n";
5854                         }
5855
5856                         if ($alternate) {
5857                                 print "<tr class=\"dark\">\n";
5858                         } else {
5859                                 print "<tr class=\"light\">\n";
5860                         }
5861                         $alternate ^= 1;
5862                         %co = parse_commit($set{'commit'});
5863                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5864                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5865                               "<td><i>$author</i></td>\n" .
5866                               "<td>" .
5867                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5868                                       -class => "list subject"},
5869                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5870                 } elsif (defined $set{'to_id'}) {
5871                         next if ($set{'to_id'} =~ m/^0{40}$/);
5872
5873                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5874                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5875                                       -class => "list"},
5876                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5877                               "<br/>\n";
5878                 }
5879         }
5880         close $fd;
5881
5882         # finish last commit (warning: repetition!)
5883         if (%co) {
5884                 print "</td>\n" .
5885                       "<td class=\"link\">" .
5886                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5887                               "commit") .
5888                       " | " .
5889                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5890                                              hash_base=>$co{'id'})},
5891                               "tree") .
5892                       "</td>\n" .
5893                       "</tr>\n";
5894         }
5895
5896         print "</table>\n";
5897
5898         git_footer_html();
5899 }
5900
5901 sub git_search_files {
5902         my %co = @_;
5903
5904         local $/ = "\n";
5905         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5906                 $search_use_regexp ? ('-E', '-i') : '-F',
5907                 $searchtext, $co{'tree'}
5908                         or die_error(500, "Open git-grep failed");
5909
5910         git_header_html();
5911
5912         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5913         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5914
5915         print "<table class=\"grep_search\">\n";
5916         my $alternate = 1;
5917         my $matches = 0;
5918         my $lastfile = '';
5919         while (my $line = <$fd>) {
5920                 chomp $line;
5921                 my ($file, $file_href, $lno, $ltext, $binary);
5922                 last if ($matches++ > 1000);
5923                 if ($line =~ /^Binary file (.+) matches$/) {
5924                         $file = $1;
5925                         $binary = 1;
5926                 } else {
5927                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5928                         $file =~ s/^$co{'tree'}://;
5929                 }
5930                 if ($file ne $lastfile) {
5931                         $lastfile and print "</td></tr>\n";
5932                         if ($alternate++) {
5933                                 print "<tr class=\"dark\">\n";
5934                         } else {
5935                                 print "<tr class=\"light\">\n";
5936                         }
5937                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5938                                           file_name=>$file);
5939                         print "<td class=\"list\">".
5940                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5941                         print "</td><td>\n";
5942                         $lastfile = $file;
5943                 }
5944                 if ($binary) {
5945                         print "<div class=\"binary\">Binary file</div>\n";
5946                 } else {
5947                         $ltext = untabify($ltext);
5948                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5949                                 $ltext = esc_html($1, -nbsp=>1);
5950                                 $ltext .= '<span class="match">';
5951                                 $ltext .= esc_html($2, -nbsp=>1);
5952                                 $ltext .= '</span>';
5953                                 $ltext .= esc_html($3, -nbsp=>1);
5954                         } else {
5955                                 $ltext = esc_html($ltext, -nbsp=>1);
5956                         }
5957                         print "<div class=\"pre\">" .
5958                                 $cgi->a({-href => $file_href.'#l'.$lno,
5959                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5960                                 ' ' .  $ltext . "</div>\n";
5961                 }
5962         }
5963         if ($lastfile) {
5964                 print "</td></tr>\n";
5965                 if ($matches > 1000) {
5966                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5967                 }
5968         } else {
5969                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5970         }
5971         close $fd;
5972
5973         print "</table>\n";
5974
5975         git_footer_html();
5976 }
5977
5978 sub git_search_grep_body {
5979         my ($commitlist, $from, $to, $extra) = @_;
5980         $from = 0 unless defined $from;
5981         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5982
5983         print "<table class=\"commit_search\">\n";
5984         my $alternate = 1;
5985         for (my $i = $from; $i <= $to; $i++) {
5986                 my %co = %{$commitlist->[$i]};
5987                 if (!%co) {
5988                         next;
5989                 }
5990                 my $commit = $co{'id'};
5991                 if ($alternate) {
5992                         print "<tr class=\"dark\">\n";
5993                 } else {
5994                         print "<tr class=\"light\">\n";
5995                 }
5996                 $alternate ^= 1;
5997                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5998                       format_author_html('td', \%co, 15, 5) .
5999                       "<td>" .
6000                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6001                                -class => "list subject"},
6002                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6003                 my $comment = $co{'comment'};
6004                 foreach my $line (@$comment) {
6005                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6006                                 my ($lead, $match, $trail) = ($1, $2, $3);
6007                                 $match = chop_str($match, 70, 5, 'center');
6008                                 my $contextlen = int((80 - length($match))/2);
6009                                 $contextlen = 30 if ($contextlen > 30);
6010                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6011                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6012
6013                                 $lead  = esc_html($lead);
6014                                 $match = esc_html($match);
6015                                 $trail = esc_html($trail);
6016
6017                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6018                         }
6019                 }
6020                 print "</td>\n" .
6021                       "<td class=\"link\">" .
6022                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6023                       " | " .
6024                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6025                       " | " .
6026                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6027                 print "</td>\n" .
6028                       "</tr>\n";
6029         }
6030         if (defined $extra) {
6031                 print "<tr>\n" .
6032                       "<td colspan=\"3\">$extra</td>\n" .
6033                       "</tr>\n";
6034         }
6035         print "</table>\n";
6036 }
6037
6038 ## ======================================================================
6039 ## ======================================================================
6040 ## actions
6041
6042 sub git_project_list {
6043         my $order = $input_params{'order'};
6044         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6045                 die_error(400, "Unknown order parameter");
6046         }
6047
6048         my @list = git_get_projects_list($project_filter, $strict_export);
6049         if (!@list) {
6050                 die_error(404, "No projects found");
6051         }
6052
6053         git_header_html();
6054         if (defined $home_text && -f $home_text) {
6055                 print "<div class=\"index_include\">\n";
6056                 insert_file($home_text);
6057                 print "</div>\n";
6058         }
6059
6060         git_project_search_form($searchtext, $search_use_regexp);
6061         git_project_list_body(\@list, $order);
6062         git_footer_html();
6063 }
6064
6065 sub git_forks {
6066         my $order = $input_params{'order'};
6067         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6068                 die_error(400, "Unknown order parameter");
6069         }
6070
6071         my $filter = $project;
6072         $filter =~ s/\.git$//;
6073         my @list = git_get_projects_list($filter);
6074         if (!@list) {
6075                 die_error(404, "No forks found");
6076         }
6077
6078         git_header_html();
6079         git_print_page_nav('','');
6080         git_print_header_div('summary', "$project forks");
6081         git_project_list_body(\@list, $order);
6082         git_footer_html();
6083 }
6084
6085 sub git_project_index {
6086         my @projects = git_get_projects_list($project_filter, $strict_export);
6087         if (!@projects) {
6088                 die_error(404, "No projects found");
6089         }
6090
6091         print $cgi->header(
6092                 -type => 'text/plain',
6093                 -charset => 'utf-8',
6094                 -content_disposition => 'inline; filename="index.aux"');
6095
6096         foreach my $pr (@projects) {
6097                 if (!exists $pr->{'owner'}) {
6098                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6099                 }
6100
6101                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6102                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6103                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6104                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6105                 $path  =~ s/ /\+/g;
6106                 $owner =~ s/ /\+/g;
6107
6108                 print "$path $owner\n";
6109         }
6110 }
6111
6112 sub git_summary {
6113         my $descr = git_get_project_description($project) || "none";
6114         my %co = parse_commit("HEAD");
6115         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6116         my $head = $co{'id'};
6117         my $remote_heads = gitweb_check_feature('remote_heads');
6118
6119         my $owner = git_get_project_owner($project);
6120
6121         my $refs = git_get_references();
6122         # These get_*_list functions return one more to allow us to see if
6123         # there are more ...
6124         my @taglist  = git_get_tags_list(16);
6125         my @headlist = git_get_heads_list(16);
6126         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6127         my @forklist;
6128         my $check_forks = gitweb_check_feature('forks');
6129
6130         if ($check_forks) {
6131                 # find forks of a project
6132                 my $filter = $project;
6133                 $filter =~ s/\.git$//;
6134                 @forklist = git_get_projects_list($filter);
6135                 # filter out forks of forks
6136                 @forklist = filter_forks_from_projects_list(\@forklist)
6137                         if (@forklist);
6138         }
6139
6140         git_header_html();
6141         git_print_page_nav('summary','', $head);
6142
6143         print "<div class=\"title\">&nbsp;</div>\n";
6144         print "<table class=\"projects_list\">\n" .
6145               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6146               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6147         if (defined $cd{'rfc2822'}) {
6148                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6149                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6150         }
6151
6152         # use per project git URL list in $projectroot/$project/cloneurl
6153         # or make project git URL from git base URL and project name
6154         my $url_tag = "URL";
6155         my @url_list = git_get_project_url_list($project);
6156         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6157         foreach my $git_url (@url_list) {
6158                 next unless $git_url;
6159                 print format_repo_url($url_tag, $git_url);
6160                 $url_tag = "";
6161         }
6162
6163         # Tag cloud
6164         my $show_ctags = gitweb_check_feature('ctags');
6165         if ($show_ctags) {
6166                 my $ctags = git_get_project_ctags($project);
6167                 if (%$ctags) {
6168                         # without ability to add tags, don't show if there are none
6169                         my $cloud = git_populate_project_tagcloud($ctags);
6170                         print "<tr id=\"metadata_ctags\">" .
6171                               "<td>content tags</td>" .
6172                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6173                               "</tr>\n";
6174                 }
6175         }
6176
6177         print "</table>\n";
6178
6179         # If XSS prevention is on, we don't include README.html.
6180         # TODO: Allow a readme in some safe format.
6181         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6182                 print "<div class=\"title\">readme</div>\n" .
6183                       "<div class=\"readme\">\n";
6184                 insert_file("$projectroot/$project/README.html");
6185                 print "\n</div>\n"; # class="readme"
6186         }
6187
6188         # we need to request one more than 16 (0..15) to check if
6189         # those 16 are all
6190         my @commitlist = $head ? parse_commits($head, 17) : ();
6191         if (@commitlist) {
6192                 git_print_header_div('shortlog');
6193                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6194                                   $#commitlist <=  15 ? undef :
6195                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6196         }
6197
6198         if (@taglist) {
6199                 git_print_header_div('tags');
6200                 git_tags_body(\@taglist, 0, 15,
6201                               $#taglist <=  15 ? undef :
6202                               $cgi->a({-href => href(action=>"tags")}, "..."));
6203         }
6204
6205         if (@headlist) {
6206                 git_print_header_div('heads');
6207                 git_heads_body(\@headlist, $head, 0, 15,
6208                                $#headlist <= 15 ? undef :
6209                                $cgi->a({-href => href(action=>"heads")}, "..."));
6210         }
6211
6212         if (%remotedata) {
6213                 git_print_header_div('remotes');
6214                 git_remotes_body(\%remotedata, 15, $head);
6215         }
6216
6217         if (@forklist) {
6218                 git_print_header_div('forks');
6219                 git_project_list_body(\@forklist, 'age', 0, 15,
6220                                       $#forklist <= 15 ? undef :
6221                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6222                                       'no_header');
6223         }
6224
6225         git_footer_html();
6226 }
6227
6228 sub git_tag {
6229         my %tag = parse_tag($hash);
6230
6231         if (! %tag) {
6232                 die_error(404, "Unknown tag object");
6233         }
6234
6235         my $head = git_get_head_hash($project);
6236         git_header_html();
6237         git_print_page_nav('','', $head,undef,$head);
6238         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6239         print "<div class=\"title_text\">\n" .
6240               "<table class=\"object_header\">\n" .
6241               "<tr>\n" .
6242               "<td>object</td>\n" .
6243               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6244                                $tag{'object'}) . "</td>\n" .
6245               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6246                                               $tag{'type'}) . "</td>\n" .
6247               "</tr>\n";
6248         if (defined($tag{'author'})) {
6249                 git_print_authorship_rows(\%tag, 'author');
6250         }
6251         print "</table>\n\n" .
6252               "</div>\n";
6253         print "<div class=\"page_body\">";
6254         my $comment = $tag{'comment'};
6255         foreach my $line (@$comment) {
6256                 chomp $line;
6257                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6258         }
6259         print "</div>\n";
6260         git_footer_html();
6261 }
6262
6263 sub git_blame_common {
6264         my $format = shift || 'porcelain';
6265         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6266                 $format = 'incremental';
6267                 $action = 'blame_incremental'; # for page title etc
6268         }
6269
6270         # permissions
6271         gitweb_check_feature('blame')
6272                 or die_error(403, "Blame view not allowed");
6273
6274         # error checking
6275         die_error(400, "No file name given") unless $file_name;
6276         $hash_base ||= git_get_head_hash($project);
6277         die_error(404, "Couldn't find base commit") unless $hash_base;
6278         my %co = parse_commit($hash_base)
6279                 or die_error(404, "Commit not found");
6280         my $ftype = "blob";
6281         if (!defined $hash) {
6282                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6283                         or die_error(404, "Error looking up file");
6284         } else {
6285                 $ftype = git_get_type($hash);
6286                 if ($ftype !~ "blob") {
6287                         die_error(400, "Object is not a blob");
6288                 }
6289         }
6290
6291         my $fd;
6292         if ($format eq 'incremental') {
6293                 # get file contents (as base)
6294                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6295                         or die_error(500, "Open git-cat-file failed");
6296         } elsif ($format eq 'data') {
6297                 # run git-blame --incremental
6298                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6299                         $hash_base, "--", $file_name
6300                         or die_error(500, "Open git-blame --incremental failed");
6301         } else {
6302                 # run git-blame --porcelain
6303                 open $fd, "-|", git_cmd(), "blame", '-p',
6304                         $hash_base, '--', $file_name
6305                         or die_error(500, "Open git-blame --porcelain failed");
6306         }
6307
6308         # incremental blame data returns early
6309         if ($format eq 'data') {
6310                 print $cgi->header(
6311                         -type=>"text/plain", -charset => "utf-8",
6312                         -status=> "200 OK");
6313                 local $| = 1; # output autoflush
6314                 while (my $line = <$fd>) {
6315                         print to_utf8($line);
6316                 }
6317                 close $fd
6318                         or print "ERROR $!\n";
6319
6320                 print 'END';
6321                 if (defined $t0 && gitweb_check_feature('timed')) {
6322                         print ' '.
6323                               tv_interval($t0, [ gettimeofday() ]).
6324                               ' '.$number_of_git_cmds;
6325                 }
6326                 print "\n";
6327
6328                 return;
6329         }
6330
6331         # page header
6332         git_header_html();
6333         my $formats_nav =
6334                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6335                         "blob") .
6336                 " | ";
6337         if ($format eq 'incremental') {
6338                 $formats_nav .=
6339                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6340                                 "blame") . " (non-incremental)";
6341         } else {
6342                 $formats_nav .=
6343                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6344                                 "blame") . " (incremental)";
6345         }
6346         $formats_nav .=
6347                 " | " .
6348                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6349                         "history") .
6350                 " | " .
6351                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6352                         "HEAD");
6353         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6354         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6355         git_print_page_path($file_name, $ftype, $hash_base);
6356
6357         # page body
6358         if ($format eq 'incremental') {
6359                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6360                       "This page requires JavaScript to run.\n Use ".
6361                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6362                               'this page').
6363                       " instead.\n".
6364                       "</b></center></div>\n</noscript>\n";
6365
6366                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6367         }
6368
6369         print qq!<div class="page_body">\n!;
6370         print qq!<div id="progress_info">... / ...</div>\n!
6371                 if ($format eq 'incremental');
6372         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6373               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6374               qq!<thead>\n!.
6375               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6376               qq!</thead>\n!.
6377               qq!<tbody>\n!;
6378
6379         my @rev_color = qw(light dark);
6380         my $num_colors = scalar(@rev_color);
6381         my $current_color = 0;
6382
6383         if ($format eq 'incremental') {
6384                 my $color_class = $rev_color[$current_color];
6385
6386                 #contents of a file
6387                 my $linenr = 0;
6388         LINE:
6389                 while (my $line = <$fd>) {
6390                         chomp $line;
6391                         $linenr++;
6392
6393                         print qq!<tr id="l$linenr" class="$color_class">!.
6394                               qq!<td class="sha1"><a href=""> </a></td>!.
6395                               qq!<td class="linenr">!.
6396                               qq!<a class="linenr" href="">$linenr</a></td>!;
6397                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6398                         print qq!</tr>\n!;
6399                 }
6400
6401         } else { # porcelain, i.e. ordinary blame
6402                 my %metainfo = (); # saves information about commits
6403
6404                 # blame data
6405         LINE:
6406                 while (my $line = <$fd>) {
6407                         chomp $line;
6408                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6409                         # no <lines in group> for subsequent lines in group of lines
6410                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6411                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6412                         if (!exists $metainfo{$full_rev}) {
6413                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6414                         }
6415                         my $meta = $metainfo{$full_rev};
6416                         my $data;
6417                         while ($data = <$fd>) {
6418                                 chomp $data;
6419                                 last if ($data =~ s/^\t//); # contents of line
6420                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6421                                         $meta->{$1} = $2 unless exists $meta->{$1};
6422                                 }
6423                                 if ($data =~ /^previous /) {
6424                                         $meta->{'nprevious'}++;
6425                                 }
6426                         }
6427                         my $short_rev = substr($full_rev, 0, 8);
6428                         my $author = $meta->{'author'};
6429                         my %date =
6430                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6431                         my $date = $date{'iso-tz'};
6432                         if ($group_size) {
6433                                 $current_color = ($current_color + 1) % $num_colors;
6434                         }
6435                         my $tr_class = $rev_color[$current_color];
6436                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6437                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6438                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6439                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6440                         if ($group_size) {
6441                                 print "<td class=\"sha1\"";
6442                                 print " title=\"". esc_html($author) . ", $date\"";
6443                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6444                                 print ">";
6445                                 print $cgi->a({-href => href(action=>"commit",
6446                                                              hash=>$full_rev,
6447                                                              file_name=>$file_name)},
6448                                               esc_html($short_rev));
6449                                 if ($group_size >= 2) {
6450                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6451                                         if (@author_initials) {
6452                                                 print "<br />" .
6453                                                       esc_html(join('', @author_initials));
6454                                                 #           or join('.', ...)
6455                                         }
6456                                 }
6457                                 print "</td>\n";
6458                         }
6459                         # 'previous' <sha1 of parent commit> <filename at commit>
6460                         if (exists $meta->{'previous'} &&
6461                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6462                                 $meta->{'parent'} = $1;
6463                                 $meta->{'file_parent'} = unquote($2);
6464                         }
6465                         my $linenr_commit =
6466                                 exists($meta->{'parent'}) ?
6467                                 $meta->{'parent'} : $full_rev;
6468                         my $linenr_filename =
6469                                 exists($meta->{'file_parent'}) ?
6470                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6471                         my $blamed = href(action => 'blame',
6472                                           file_name => $linenr_filename,
6473                                           hash_base => $linenr_commit);
6474                         print "<td class=\"linenr\">";
6475                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6476                                         -class => "linenr" },
6477                                       esc_html($lineno));
6478                         print "</td>";
6479                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6480                         print "</tr>\n";
6481                 } # end while
6482
6483         }
6484
6485         # footer
6486         print "</tbody>\n".
6487               "</table>\n"; # class="blame"
6488         print "</div>\n";   # class="blame_body"
6489         close $fd
6490                 or print "Reading blob failed\n";
6491
6492         git_footer_html();
6493 }
6494
6495 sub git_blame {
6496         git_blame_common();
6497 }
6498
6499 sub git_blame_incremental {
6500         git_blame_common('incremental');
6501 }
6502
6503 sub git_blame_data {
6504         git_blame_common('data');
6505 }
6506
6507 sub git_tags {
6508         my $head = git_get_head_hash($project);
6509         git_header_html();
6510         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6511         git_print_header_div('summary', $project);
6512
6513         my @tagslist = git_get_tags_list();
6514         if (@tagslist) {
6515                 git_tags_body(\@tagslist);
6516         }
6517         git_footer_html();
6518 }
6519
6520 sub git_heads {
6521         my $head = git_get_head_hash($project);
6522         git_header_html();
6523         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6524         git_print_header_div('summary', $project);
6525
6526         my @headslist = git_get_heads_list();
6527         if (@headslist) {
6528                 git_heads_body(\@headslist, $head);
6529         }
6530         git_footer_html();
6531 }
6532
6533 # used both for single remote view and for list of all the remotes
6534 sub git_remotes {
6535         gitweb_check_feature('remote_heads')
6536                 or die_error(403, "Remote heads view is disabled");
6537
6538         my $head = git_get_head_hash($project);
6539         my $remote = $input_params{'hash'};
6540
6541         my $remotedata = git_get_remotes_list($remote);
6542         die_error(500, "Unable to get remote information") unless defined $remotedata;
6543
6544         unless (%$remotedata) {
6545                 die_error(404, defined $remote ?
6546                         "Remote $remote not found" :
6547                         "No remotes found");
6548         }
6549
6550         git_header_html(undef, undef, -action_extra => $remote);
6551         git_print_page_nav('', '',  $head, undef, $head,
6552                 format_ref_views($remote ? '' : 'remotes'));
6553
6554         fill_remote_heads($remotedata);
6555         if (defined $remote) {
6556                 git_print_header_div('remotes', "$remote remote for $project");
6557                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6558         } else {
6559                 git_print_header_div('summary', "$project remotes");
6560                 git_remotes_body($remotedata, undef, $head);
6561         }
6562
6563         git_footer_html();
6564 }
6565
6566 sub git_blob_plain {
6567         my $type = shift;
6568         my $expires;
6569
6570         if (!defined $hash) {
6571                 if (defined $file_name) {
6572                         my $base = $hash_base || git_get_head_hash($project);
6573                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6574                                 or die_error(404, "Cannot find file");
6575                 } else {
6576                         die_error(400, "No file name defined");
6577                 }
6578         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6579                 # blobs defined by non-textual hash id's can be cached
6580                 $expires = "+1d";
6581         }
6582
6583         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6584                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6585
6586         # content-type (can include charset)
6587         $type = blob_contenttype($fd, $file_name, $type);
6588
6589         # "save as" filename, even when no $file_name is given
6590         my $save_as = "$hash";
6591         if (defined $file_name) {
6592                 $save_as = $file_name;
6593         } elsif ($type =~ m/^text\//) {
6594                 $save_as .= '.txt';
6595         }
6596
6597         # With XSS prevention on, blobs of all types except a few known safe
6598         # ones are served with "Content-Disposition: attachment" to make sure
6599         # they don't run in our security domain.  For certain image types,
6600         # blob view writes an <img> tag referring to blob_plain view, and we
6601         # want to be sure not to break that by serving the image as an
6602         # attachment (though Firefox 3 doesn't seem to care).
6603         my $sandbox = $prevent_xss &&
6604                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6605
6606         # serve text/* as text/plain
6607         if ($prevent_xss &&
6608             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6609              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6610                 my $rest = $1;
6611                 $rest = defined $rest ? $rest : '';
6612                 $type = "text/plain$rest";
6613         }
6614
6615         print $cgi->header(
6616                 -type => $type,
6617                 -expires => $expires,
6618                 -content_disposition =>
6619                         ($sandbox ? 'attachment' : 'inline')
6620                         . '; filename="' . $save_as . '"');
6621         local $/ = undef;
6622         binmode STDOUT, ':raw';
6623         print <$fd>;
6624         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6625         close $fd;
6626 }
6627
6628 sub git_blob {
6629         my $expires;
6630
6631         if (!defined $hash) {
6632                 if (defined $file_name) {
6633                         my $base = $hash_base || git_get_head_hash($project);
6634                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6635                                 or die_error(404, "Cannot find file");
6636                 } else {
6637                         die_error(400, "No file name defined");
6638                 }
6639         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6640                 # blobs defined by non-textual hash id's can be cached
6641                 $expires = "+1d";
6642         }
6643
6644         my $have_blame = gitweb_check_feature('blame');
6645         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6646                 or die_error(500, "Couldn't cat $file_name, $hash");
6647         my $mimetype = blob_mimetype($fd, $file_name);
6648         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6649         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6650                 close $fd;
6651                 return git_blob_plain($mimetype);
6652         }
6653         # we can have blame only for text/* mimetype
6654         $have_blame &&= ($mimetype =~ m!^text/!);
6655
6656         my $highlight = gitweb_check_feature('highlight');
6657         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6658         $fd = run_highlighter($fd, $highlight, $syntax)
6659                 if $syntax;
6660
6661         git_header_html(undef, $expires);
6662         my $formats_nav = '';
6663         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6664                 if (defined $file_name) {
6665                         if ($have_blame) {
6666                                 $formats_nav .=
6667                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6668                                                 "blame") .
6669                                         " | ";
6670                         }
6671                         $formats_nav .=
6672                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6673                                         "history") .
6674                                 " | " .
6675                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6676                                         "raw") .
6677                                 " | " .
6678                                 $cgi->a({-href => href(action=>"blob",
6679                                                        hash_base=>"HEAD", file_name=>$file_name)},
6680                                         "HEAD");
6681                 } else {
6682                         $formats_nav .=
6683                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6684                                         "raw");
6685                 }
6686                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6687                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6688         } else {
6689                 print "<div class=\"page_nav\">\n" .
6690                       "<br/><br/></div>\n" .
6691                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6692         }
6693         git_print_page_path($file_name, "blob", $hash_base);
6694         print "<div class=\"page_body\">\n";
6695         if ($mimetype =~ m!^image/!) {
6696                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6697                 if ($file_name) {
6698                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6699                 }
6700                 print qq! src="! .
6701                       href(action=>"blob_plain", hash=>$hash,
6702                            hash_base=>$hash_base, file_name=>$file_name) .
6703                       qq!" />\n!;
6704         } else {
6705                 my $nr;
6706                 while (my $line = <$fd>) {
6707                         chomp $line;
6708                         $nr++;
6709                         $line = untabify($line);
6710                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6711                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6712                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6713                 }
6714         }
6715         close $fd
6716                 or print "Reading blob failed.\n";
6717         print "</div>";
6718         git_footer_html();
6719 }
6720
6721 sub git_tree {
6722         if (!defined $hash_base) {
6723                 $hash_base = "HEAD";
6724         }
6725         if (!defined $hash) {
6726                 if (defined $file_name) {
6727                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6728                 } else {
6729                         $hash = $hash_base;
6730                 }
6731         }
6732         die_error(404, "No such tree") unless defined($hash);
6733
6734         my $show_sizes = gitweb_check_feature('show-sizes');
6735         my $have_blame = gitweb_check_feature('blame');
6736
6737         my @entries = ();
6738         {
6739                 local $/ = "\0";
6740                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6741                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6742                         or die_error(500, "Open git-ls-tree failed");
6743                 @entries = map { chomp; $_ } <$fd>;
6744                 close $fd
6745                         or die_error(404, "Reading tree failed");
6746         }
6747
6748         my $refs = git_get_references();
6749         my $ref = format_ref_marker($refs, $hash_base);
6750         git_header_html();
6751         my $basedir = '';
6752         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6753                 my @views_nav = ();
6754                 if (defined $file_name) {
6755                         push @views_nav,
6756                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6757                                         "history"),
6758                                 $cgi->a({-href => href(action=>"tree",
6759                                                        hash_base=>"HEAD", file_name=>$file_name)},
6760                                         "HEAD"),
6761                 }
6762                 my $snapshot_links = format_snapshot_links($hash);
6763                 if (defined $snapshot_links) {
6764                         # FIXME: Should be available when we have no hash base as well.
6765                         push @views_nav, $snapshot_links;
6766                 }
6767                 git_print_page_nav('tree','', $hash_base, undef, undef,
6768                                    join(' | ', @views_nav));
6769                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6770         } else {
6771                 undef $hash_base;
6772                 print "<div class=\"page_nav\">\n";
6773                 print "<br/><br/></div>\n";
6774                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6775         }
6776         if (defined $file_name) {
6777                 $basedir = $file_name;
6778                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6779                         $basedir .= '/';
6780                 }
6781                 git_print_page_path($file_name, 'tree', $hash_base);
6782         }
6783         print "<div class=\"page_body\">\n";
6784         print "<table class=\"tree\">\n";
6785         my $alternate = 1;
6786         # '..' (top directory) link if possible
6787         if (defined $hash_base &&
6788             defined $file_name && $file_name =~ m![^/]+$!) {
6789                 if ($alternate) {
6790                         print "<tr class=\"dark\">\n";
6791                 } else {
6792                         print "<tr class=\"light\">\n";
6793                 }
6794                 $alternate ^= 1;
6795
6796                 my $up = $file_name;
6797                 $up =~ s!/?[^/]+$!!;
6798                 undef $up unless $up;
6799                 # based on git_print_tree_entry
6800                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6801                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6802                 print '<td class="list">';
6803                 print $cgi->a({-href => href(action=>"tree",
6804                                              hash_base=>$hash_base,
6805                                              file_name=>$up)},
6806                               "..");
6807                 print "</td>\n";
6808                 print "<td class=\"link\"></td>\n";
6809
6810                 print "</tr>\n";
6811         }
6812         foreach my $line (@entries) {
6813                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6814
6815                 if ($alternate) {
6816                         print "<tr class=\"dark\">\n";
6817                 } else {
6818                         print "<tr class=\"light\">\n";
6819                 }
6820                 $alternate ^= 1;
6821
6822                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6823
6824                 print "</tr>\n";
6825         }
6826         print "</table>\n" .
6827               "</div>";
6828         git_footer_html();
6829 }
6830
6831 sub snapshot_name {
6832         my ($project, $hash) = @_;
6833
6834         # path/to/project.git  -> project
6835         # path/to/project/.git -> project
6836         my $name = to_utf8($project);
6837         $name =~ s,([^/])/*\.git$,$1,;
6838         $name = basename($name);
6839         # sanitize name
6840         $name =~ s/[[:cntrl:]]/?/g;
6841
6842         my $ver = $hash;
6843         if ($hash =~ /^[0-9a-fA-F]+$/) {
6844                 # shorten SHA-1 hash
6845                 my $full_hash = git_get_full_hash($project, $hash);
6846                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6847                         $ver = git_get_short_hash($project, $hash);
6848                 }
6849         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6850                 # tags don't need shortened SHA-1 hash
6851                 $ver = $1;
6852         } else {
6853                 # branches and other need shortened SHA-1 hash
6854                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6855                         $ver = $1;
6856                 }
6857                 $ver .= '-' . git_get_short_hash($project, $hash);
6858         }
6859         # in case of hierarchical branch names
6860         $ver =~ s!/!.!g;
6861
6862         # name = project-version_string
6863         $name = "$name-$ver";
6864
6865         return wantarray ? ($name, $name) : $name;
6866 }
6867
6868 sub git_snapshot {
6869         my $format = $input_params{'snapshot_format'};
6870         if (!@snapshot_fmts) {
6871                 die_error(403, "Snapshots not allowed");
6872         }
6873         # default to first supported snapshot format
6874         $format ||= $snapshot_fmts[0];
6875         if ($format !~ m/^[a-z0-9]+$/) {
6876                 die_error(400, "Invalid snapshot format parameter");
6877         } elsif (!exists($known_snapshot_formats{$format})) {
6878                 die_error(400, "Unknown snapshot format");
6879         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6880                 die_error(403, "Snapshot format not allowed");
6881         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6882                 die_error(403, "Unsupported snapshot format");
6883         }
6884
6885         my $type = git_get_type("$hash^{}");
6886         if (!$type) {
6887                 die_error(404, 'Object does not exist');
6888         }  elsif ($type eq 'blob') {
6889                 die_error(400, 'Object is not a tree-ish');
6890         }
6891
6892         my ($name, $prefix) = snapshot_name($project, $hash);
6893         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6894         my $cmd = quote_command(
6895                 git_cmd(), 'archive',
6896                 "--format=$known_snapshot_formats{$format}{'format'}",
6897                 "--prefix=$prefix/", $hash);
6898         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6899                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6900         }
6901
6902         $filename =~ s/(["\\])/\\$1/g;
6903         print $cgi->header(
6904                 -type => $known_snapshot_formats{$format}{'type'},
6905                 -content_disposition => 'inline; filename="' . $filename . '"',
6906                 -status => '200 OK');
6907
6908         open my $fd, "-|", $cmd
6909                 or die_error(500, "Execute git-archive failed");
6910         binmode STDOUT, ':raw';
6911         print <$fd>;
6912         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6913         close $fd;
6914 }
6915
6916 sub git_log_generic {
6917         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6918
6919         my $head = git_get_head_hash($project);
6920         if (!defined $base) {
6921                 $base = $head;
6922         }
6923         if (!defined $page) {
6924                 $page = 0;
6925         }
6926         my $refs = git_get_references();
6927
6928         my $commit_hash = $base;
6929         if (defined $parent) {
6930                 $commit_hash = "$parent..$base";
6931         }
6932         my @commitlist =
6933                 parse_commits($commit_hash, 101, (100 * $page),
6934                               defined $file_name ? ($file_name, "--full-history") : ());
6935
6936         my $ftype;
6937         if (!defined $file_hash && defined $file_name) {
6938                 # some commits could have deleted file in question,
6939                 # and not have it in tree, but one of them has to have it
6940                 for (my $i = 0; $i < @commitlist; $i++) {
6941                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6942                         last if defined $file_hash;
6943                 }
6944         }
6945         if (defined $file_hash) {
6946                 $ftype = git_get_type($file_hash);
6947         }
6948         if (defined $file_name && !defined $ftype) {
6949                 die_error(500, "Unknown type of object");
6950         }
6951         my %co;
6952         if (defined $file_name) {
6953                 %co = parse_commit($base)
6954                         or die_error(404, "Unknown commit object");
6955         }
6956
6957
6958         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6959         my $next_link = '';
6960         if ($#commitlist >= 100) {
6961                 $next_link =
6962                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6963                                  -accesskey => "n", -title => "Alt-n"}, "next");
6964         }
6965         my $patch_max = gitweb_get_feature('patches');
6966         if ($patch_max && !defined $file_name) {
6967                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6968                         $paging_nav .= " &sdot; " .
6969                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6970                                         "patches");
6971                 }
6972         }
6973
6974         git_header_html();
6975         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6976         if (defined $file_name) {
6977                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6978         } else {
6979                 git_print_header_div('summary', $project)
6980         }
6981         git_print_page_path($file_name, $ftype, $hash_base)
6982                 if (defined $file_name);
6983
6984         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6985                      $file_name, $file_hash, $ftype);
6986
6987         git_footer_html();
6988 }
6989
6990 sub git_log {
6991         git_log_generic('log', \&git_log_body,
6992                         $hash, $hash_parent);
6993 }
6994
6995 sub git_commit {
6996         $hash ||= $hash_base || "HEAD";
6997         my %co = parse_commit($hash)
6998             or die_error(404, "Unknown commit object");
6999
7000         my $parent  = $co{'parent'};
7001         my $parents = $co{'parents'}; # listref
7002
7003         # we need to prepare $formats_nav before any parameter munging
7004         my $formats_nav;
7005         if (!defined $parent) {
7006                 # --root commitdiff
7007                 $formats_nav .= '(initial)';
7008         } elsif (@$parents == 1) {
7009                 # single parent commit
7010                 $formats_nav .=
7011                         '(parent: ' .
7012                         $cgi->a({-href => href(action=>"commit",
7013                                                hash=>$parent)},
7014                                 esc_html(substr($parent, 0, 7))) .
7015                         ')';
7016         } else {
7017                 # merge commit
7018                 $formats_nav .=
7019                         '(merge: ' .
7020                         join(' ', map {
7021                                 $cgi->a({-href => href(action=>"commit",
7022                                                        hash=>$_)},
7023                                         esc_html(substr($_, 0, 7)));
7024                         } @$parents ) .
7025                         ')';
7026         }
7027         if (gitweb_check_feature('patches') && @$parents <= 1) {
7028                 $formats_nav .= " | " .
7029                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7030                                 "patch");
7031         }
7032
7033         if (!defined $parent) {
7034                 $parent = "--root";
7035         }
7036         my @difftree;
7037         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7038                 @diff_opts,
7039                 (@$parents <= 1 ? $parent : '-c'),
7040                 $hash, "--"
7041                 or die_error(500, "Open git-diff-tree failed");
7042         @difftree = map { chomp; $_ } <$fd>;
7043         close $fd or die_error(404, "Reading git-diff-tree failed");
7044
7045         # non-textual hash id's can be cached
7046         my $expires;
7047         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7048                 $expires = "+1d";
7049         }
7050         my $refs = git_get_references();
7051         my $ref = format_ref_marker($refs, $co{'id'});
7052
7053         git_header_html(undef, $expires);
7054         git_print_page_nav('commit', '',
7055                            $hash, $co{'tree'}, $hash,
7056                            $formats_nav);
7057
7058         if (defined $co{'parent'}) {
7059                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7060         } else {
7061                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7062         }
7063         print "<div class=\"title_text\">\n" .
7064               "<table class=\"object_header\">\n";
7065         git_print_authorship_rows(\%co);
7066         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7067         print "<tr>" .
7068               "<td>tree</td>" .
7069               "<td class=\"sha1\">" .
7070               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7071                        class => "list"}, $co{'tree'}) .
7072               "</td>" .
7073               "<td class=\"link\">" .
7074               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7075                       "tree");
7076         my $snapshot_links = format_snapshot_links($hash);
7077         if (defined $snapshot_links) {
7078                 print " | " . $snapshot_links;
7079         }
7080         print "</td>" .
7081               "</tr>\n";
7082
7083         foreach my $par (@$parents) {
7084                 print "<tr>" .
7085                       "<td>parent</td>" .
7086                       "<td class=\"sha1\">" .
7087                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7088                                class => "list"}, $par) .
7089                       "</td>" .
7090                       "<td class=\"link\">" .
7091                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7092                       " | " .
7093                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7094                       "</td>" .
7095                       "</tr>\n";
7096         }
7097         print "</table>".
7098               "</div>\n";
7099
7100         print "<div class=\"page_body\">\n";
7101         git_print_log($co{'comment'});
7102         print "</div>\n";
7103
7104         git_difftree_body(\@difftree, $hash, @$parents);
7105
7106         git_footer_html();
7107 }
7108
7109 sub git_object {
7110         # object is defined by:
7111         # - hash or hash_base alone
7112         # - hash_base and file_name
7113         my $type;
7114
7115         # - hash or hash_base alone
7116         if ($hash || ($hash_base && !defined $file_name)) {
7117                 my $object_id = $hash || $hash_base;
7118
7119                 open my $fd, "-|", quote_command(
7120                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7121                         or die_error(404, "Object does not exist");
7122                 $type = <$fd>;
7123                 chomp $type;
7124                 close $fd
7125                         or die_error(404, "Object does not exist");
7126
7127         # - hash_base and file_name
7128         } elsif ($hash_base && defined $file_name) {
7129                 $file_name =~ s,/+$,,;
7130
7131                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7132                         or die_error(404, "Base object does not exist");
7133
7134                 # here errors should not hapen
7135                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7136                         or die_error(500, "Open git-ls-tree failed");
7137                 my $line = <$fd>;
7138                 close $fd;
7139
7140                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7141                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7142                         die_error(404, "File or directory for given base does not exist");
7143                 }
7144                 $type = $2;
7145                 $hash = $3;
7146         } else {
7147                 die_error(400, "Not enough information to find object");
7148         }
7149
7150         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7151                                           hash=>$hash, hash_base=>$hash_base,
7152                                           file_name=>$file_name),
7153                              -status => '302 Found');
7154 }
7155
7156 sub git_blobdiff {
7157         my $format = shift || 'html';
7158         my $diff_style = $input_params{'diff_style'} || 'inline';
7159
7160         my $fd;
7161         my @difftree;
7162         my %diffinfo;
7163         my $expires;
7164
7165         # preparing $fd and %diffinfo for git_patchset_body
7166         # new style URI
7167         if (defined $hash_base && defined $hash_parent_base) {
7168                 if (defined $file_name) {
7169                         # read raw output
7170                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7171                                 $hash_parent_base, $hash_base,
7172                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7173                                 or die_error(500, "Open git-diff-tree failed");
7174                         @difftree = map { chomp; $_ } <$fd>;
7175                         close $fd
7176                                 or die_error(404, "Reading git-diff-tree failed");
7177                         @difftree
7178                                 or die_error(404, "Blob diff not found");
7179
7180                 } elsif (defined $hash &&
7181                          $hash =~ /[0-9a-fA-F]{40}/) {
7182                         # try to find filename from $hash
7183
7184                         # read filtered raw output
7185                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7186                                 $hash_parent_base, $hash_base, "--"
7187                                 or die_error(500, "Open git-diff-tree failed");
7188                         @difftree =
7189                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7190                                 # $hash == to_id
7191                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7192                                 map { chomp; $_ } <$fd>;
7193                         close $fd
7194                                 or die_error(404, "Reading git-diff-tree failed");
7195                         @difftree
7196                                 or die_error(404, "Blob diff not found");
7197
7198                 } else {
7199                         die_error(400, "Missing one of the blob diff parameters");
7200                 }
7201
7202                 if (@difftree > 1) {
7203                         die_error(400, "Ambiguous blob diff specification");
7204                 }
7205
7206                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7207                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7208                 $file_name   ||= $diffinfo{'to_file'};
7209
7210                 $hash_parent ||= $diffinfo{'from_id'};
7211                 $hash        ||= $diffinfo{'to_id'};
7212
7213                 # non-textual hash id's can be cached
7214                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7215                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7216                         $expires = '+1d';
7217                 }
7218
7219                 # open patch output
7220                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7221                         '-p', ($format eq 'html' ? "--full-index" : ()),
7222                         $hash_parent_base, $hash_base,
7223                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7224                         or die_error(500, "Open git-diff-tree failed");
7225         }
7226
7227         # old/legacy style URI -- not generated anymore since 1.4.3.
7228         if (!%diffinfo) {
7229                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7230         }
7231
7232         # header
7233         if ($format eq 'html') {
7234                 my $formats_nav =
7235                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7236                                 "raw");
7237                 $formats_nav .= diff_style_nav($diff_style);
7238                 git_header_html(undef, $expires);
7239                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7240                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7241                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7242                 } else {
7243                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7244                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7245                 }
7246                 if (defined $file_name) {
7247                         git_print_page_path($file_name, "blob", $hash_base);
7248                 } else {
7249                         print "<div class=\"page_path\"></div>\n";
7250                 }
7251
7252         } elsif ($format eq 'plain') {
7253                 print $cgi->header(
7254                         -type => 'text/plain',
7255                         -charset => 'utf-8',
7256                         -expires => $expires,
7257                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7258
7259                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7260
7261         } else {
7262                 die_error(400, "Unknown blobdiff format");
7263         }
7264
7265         # patch
7266         if ($format eq 'html') {
7267                 print "<div class=\"page_body\">\n";
7268
7269                 git_patchset_body($fd, $diff_style,
7270                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7271                 close $fd;
7272
7273                 print "</div>\n"; # class="page_body"
7274                 git_footer_html();
7275
7276         } else {
7277                 while (my $line = <$fd>) {
7278                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7279                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7280
7281                         print $line;
7282
7283                         last if $line =~ m!^\+\+\+!;
7284                 }
7285                 local $/ = undef;
7286                 print <$fd>;
7287                 close $fd;
7288         }
7289 }
7290
7291 sub git_blobdiff_plain {
7292         git_blobdiff('plain');
7293 }
7294
7295 # assumes that it is added as later part of already existing navigation,
7296 # so it returns "| foo | bar" rather than just "foo | bar"
7297 sub diff_style_nav {
7298         my ($diff_style, $is_combined) = @_;
7299         $diff_style ||= 'inline';
7300
7301         return "" if ($is_combined);
7302
7303         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7304         my %styles = @styles;
7305         @styles =
7306                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7307
7308         return join '',
7309                 map { " | ".$_ }
7310                 map {
7311                         $_ eq $diff_style ? $styles{$_} :
7312                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7313                 } @styles;
7314 }
7315
7316 sub git_commitdiff {
7317         my %params = @_;
7318         my $format = $params{-format} || 'html';
7319         my $diff_style = $input_params{'diff_style'} || 'inline';
7320
7321         my ($patch_max) = gitweb_get_feature('patches');
7322         if ($format eq 'patch') {
7323                 die_error(403, "Patch view not allowed") unless $patch_max;
7324         }
7325
7326         $hash ||= $hash_base || "HEAD";
7327         my %co = parse_commit($hash)
7328             or die_error(404, "Unknown commit object");
7329
7330         # choose format for commitdiff for merge
7331         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7332                 $hash_parent = '--cc';
7333         }
7334         # we need to prepare $formats_nav before almost any parameter munging
7335         my $formats_nav;
7336         if ($format eq 'html') {
7337                 $formats_nav =
7338                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7339                                 "raw");
7340                 if ($patch_max && @{$co{'parents'}} <= 1) {
7341                         $formats_nav .= " | " .
7342                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7343                                         "patch");
7344                 }
7345                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7346
7347                 if (defined $hash_parent &&
7348                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7349                         # commitdiff with two commits given
7350                         my $hash_parent_short = $hash_parent;
7351                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7352                                 $hash_parent_short = substr($hash_parent, 0, 7);
7353                         }
7354                         $formats_nav .=
7355                                 ' (from';
7356                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7357                                 if ($co{'parents'}[$i] eq $hash_parent) {
7358                                         $formats_nav .= ' parent ' . ($i+1);
7359                                         last;
7360                                 }
7361                         }
7362                         $formats_nav .= ': ' .
7363                                 $cgi->a({-href => href(-replay=>1,
7364                                                        hash=>$hash_parent, hash_base=>undef)},
7365                                         esc_html($hash_parent_short)) .
7366                                 ')';
7367                 } elsif (!$co{'parent'}) {
7368                         # --root commitdiff
7369                         $formats_nav .= ' (initial)';
7370                 } elsif (scalar @{$co{'parents'}} == 1) {
7371                         # single parent commit
7372                         $formats_nav .=
7373                                 ' (parent: ' .
7374                                 $cgi->a({-href => href(-replay=>1,
7375                                                        hash=>$co{'parent'}, hash_base=>undef)},
7376                                         esc_html(substr($co{'parent'}, 0, 7))) .
7377                                 ')';
7378                 } else {
7379                         # merge commit
7380                         if ($hash_parent eq '--cc') {
7381                                 $formats_nav .= ' | ' .
7382                                         $cgi->a({-href => href(-replay=>1,
7383                                                                hash=>$hash, hash_parent=>'-c')},
7384                                                 'combined');
7385                         } else { # $hash_parent eq '-c'
7386                                 $formats_nav .= ' | ' .
7387                                         $cgi->a({-href => href(-replay=>1,
7388                                                                hash=>$hash, hash_parent=>'--cc')},
7389                                                 'compact');
7390                         }
7391                         $formats_nav .=
7392                                 ' (merge: ' .
7393                                 join(' ', map {
7394                                         $cgi->a({-href => href(-replay=>1,
7395                                                                hash=>$_, hash_base=>undef)},
7396                                                 esc_html(substr($_, 0, 7)));
7397                                 } @{$co{'parents'}} ) .
7398                                 ')';
7399                 }
7400         }
7401
7402         my $hash_parent_param = $hash_parent;
7403         if (!defined $hash_parent_param) {
7404                 # --cc for multiple parents, --root for parentless
7405                 $hash_parent_param =
7406                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7407         }
7408
7409         # read commitdiff
7410         my $fd;
7411         my @difftree;
7412         if ($format eq 'html') {
7413                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7414                         "--no-commit-id", "--patch-with-raw", "--full-index",
7415                         $hash_parent_param, $hash, "--"
7416                         or die_error(500, "Open git-diff-tree failed");
7417
7418                 while (my $line = <$fd>) {
7419                         chomp $line;
7420                         # empty line ends raw part of diff-tree output
7421                         last unless $line;
7422                         push @difftree, scalar parse_difftree_raw_line($line);
7423                 }
7424
7425         } elsif ($format eq 'plain') {
7426                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7427                         '-p', $hash_parent_param, $hash, "--"
7428                         or die_error(500, "Open git-diff-tree failed");
7429         } elsif ($format eq 'patch') {
7430                 # For commit ranges, we limit the output to the number of
7431                 # patches specified in the 'patches' feature.
7432                 # For single commits, we limit the output to a single patch,
7433                 # diverging from the git-format-patch default.
7434                 my @commit_spec = ();
7435                 if ($hash_parent) {
7436                         if ($patch_max > 0) {
7437                                 push @commit_spec, "-$patch_max";
7438                         }
7439                         push @commit_spec, '-n', "$hash_parent..$hash";
7440                 } else {
7441                         if ($params{-single}) {
7442                                 push @commit_spec, '-1';
7443                         } else {
7444                                 if ($patch_max > 0) {
7445                                         push @commit_spec, "-$patch_max";
7446                                 }
7447                                 push @commit_spec, "-n";
7448                         }
7449                         push @commit_spec, '--root', $hash;
7450                 }
7451                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7452                         '--encoding=utf8', '--stdout', @commit_spec
7453                         or die_error(500, "Open git-format-patch failed");
7454         } else {
7455                 die_error(400, "Unknown commitdiff format");
7456         }
7457
7458         # non-textual hash id's can be cached
7459         my $expires;
7460         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7461                 $expires = "+1d";
7462         }
7463
7464         # write commit message
7465         if ($format eq 'html') {
7466                 my $refs = git_get_references();
7467                 my $ref = format_ref_marker($refs, $co{'id'});
7468
7469                 git_header_html(undef, $expires);
7470                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7471                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7472                 print "<div class=\"title_text\">\n" .
7473                       "<table class=\"object_header\">\n";
7474                 git_print_authorship_rows(\%co);
7475                 print "</table>".
7476                       "</div>\n";
7477                 print "<div class=\"page_body\">\n";
7478                 if (@{$co{'comment'}} > 1) {
7479                         print "<div class=\"log\">\n";
7480                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7481                         print "</div>\n"; # class="log"
7482                 }
7483
7484         } elsif ($format eq 'plain') {
7485                 my $refs = git_get_references("tags");
7486                 my $tagname = git_get_rev_name_tags($hash);
7487                 my $filename = basename($project) . "-$hash.patch";
7488
7489                 print $cgi->header(
7490                         -type => 'text/plain',
7491                         -charset => 'utf-8',
7492                         -expires => $expires,
7493                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7494                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7495                 print "From: " . to_utf8($co{'author'}) . "\n";
7496                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7497                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7498
7499                 print "X-Git-Tag: $tagname\n" if $tagname;
7500                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7501
7502                 foreach my $line (@{$co{'comment'}}) {
7503                         print to_utf8($line) . "\n";
7504                 }
7505                 print "---\n\n";
7506         } elsif ($format eq 'patch') {
7507                 my $filename = basename($project) . "-$hash.patch";
7508
7509                 print $cgi->header(
7510                         -type => 'text/plain',
7511                         -charset => 'utf-8',
7512                         -expires => $expires,
7513                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7514         }
7515
7516         # write patch
7517         if ($format eq 'html') {
7518                 my $use_parents = !defined $hash_parent ||
7519                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7520                 git_difftree_body(\@difftree, $hash,
7521                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7522                 print "<br/>\n";
7523
7524                 git_patchset_body($fd, $diff_style,
7525                                   \@difftree, $hash,
7526                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7527                 close $fd;
7528                 print "</div>\n"; # class="page_body"
7529                 git_footer_html();
7530
7531         } elsif ($format eq 'plain') {
7532                 local $/ = undef;
7533                 print <$fd>;
7534                 close $fd
7535                         or print "Reading git-diff-tree failed\n";
7536         } elsif ($format eq 'patch') {
7537                 local $/ = undef;
7538                 print <$fd>;
7539                 close $fd
7540                         or print "Reading git-format-patch failed\n";
7541         }
7542 }
7543
7544 sub git_commitdiff_plain {
7545         git_commitdiff(-format => 'plain');
7546 }
7547
7548 # format-patch-style patches
7549 sub git_patch {
7550         git_commitdiff(-format => 'patch', -single => 1);
7551 }
7552
7553 sub git_patches {
7554         git_commitdiff(-format => 'patch');
7555 }
7556
7557 sub git_history {
7558         git_log_generic('history', \&git_history_body,
7559                         $hash_base, $hash_parent_base,
7560                         $file_name, $hash);
7561 }
7562
7563 sub git_search {
7564         $searchtype ||= 'commit';
7565
7566         # check if appropriate features are enabled
7567         gitweb_check_feature('search')
7568                 or die_error(403, "Search is disabled");
7569         if ($searchtype eq 'pickaxe') {
7570                 # pickaxe may take all resources of your box and run for several minutes
7571                 # with every query - so decide by yourself how public you make this feature
7572                 gitweb_check_feature('pickaxe')
7573                         or die_error(403, "Pickaxe search is disabled");
7574         }
7575         if ($searchtype eq 'grep') {
7576                 # grep search might be potentially CPU-intensive, too
7577                 gitweb_check_feature('grep')
7578                         or die_error(403, "Grep search is disabled");
7579         }
7580
7581         if (!defined $searchtext) {
7582                 die_error(400, "Text field is empty");
7583         }
7584         if (!defined $hash) {
7585                 $hash = git_get_head_hash($project);
7586         }
7587         my %co = parse_commit($hash);
7588         if (!%co) {
7589                 die_error(404, "Unknown commit object");
7590         }
7591         if (!defined $page) {
7592                 $page = 0;
7593         }
7594
7595         if ($searchtype eq 'commit' ||
7596             $searchtype eq 'author' ||
7597             $searchtype eq 'committer') {
7598                 git_search_message(%co);
7599         } elsif ($searchtype eq 'pickaxe') {
7600                 git_search_changes(%co);
7601         } elsif ($searchtype eq 'grep') {
7602                 git_search_files(%co);
7603         } else {
7604                 die_error(400, "Unknown search type");
7605         }
7606 }
7607
7608 sub git_search_help {
7609         git_header_html();
7610         git_print_page_nav('','', $hash,$hash,$hash);
7611         print <<EOT;
7612 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7613 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7614 the pattern entered is recognized as the POSIX extended
7615 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7616 insensitive).</p>
7617 <dl>
7618 <dt><b>commit</b></dt>
7619 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7620 EOT
7621         my $have_grep = gitweb_check_feature('grep');
7622         if ($have_grep) {
7623                 print <<EOT;
7624 <dt><b>grep</b></dt>
7625 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7626     a different one) are searched for the given pattern. On large trees, this search can take
7627 a while and put some strain on the server, so please use it with some consideration. Note that
7628 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7629 case-sensitive.</dd>
7630 EOT
7631         }
7632         print <<EOT;
7633 <dt><b>author</b></dt>
7634 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7635 <dt><b>committer</b></dt>
7636 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7637 EOT
7638         my $have_pickaxe = gitweb_check_feature('pickaxe');
7639         if ($have_pickaxe) {
7640                 print <<EOT;
7641 <dt><b>pickaxe</b></dt>
7642 <dd>All commits that caused the string to appear or disappear from any file (changes that
7643 added, removed or "modified" the string) will be listed. This search can take a while and
7644 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7645 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7646 EOT
7647         }
7648         print "</dl>\n";
7649         git_footer_html();
7650 }
7651
7652 sub git_shortlog {
7653         git_log_generic('shortlog', \&git_shortlog_body,
7654                         $hash, $hash_parent);
7655 }
7656
7657 ## ......................................................................
7658 ## feeds (RSS, Atom; OPML)
7659
7660 sub git_feed {
7661         my $format = shift || 'atom';
7662         my $have_blame = gitweb_check_feature('blame');
7663
7664         # Atom: http://www.atomenabled.org/developers/syndication/
7665         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7666         if ($format ne 'rss' && $format ne 'atom') {
7667                 die_error(400, "Unknown web feed format");
7668         }
7669
7670         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7671         my $head = $hash || 'HEAD';
7672         my @commitlist = parse_commits($head, 150, 0, $file_name);
7673
7674         my %latest_commit;
7675         my %latest_date;
7676         my $content_type = "application/$format+xml";
7677         if (defined $cgi->http('HTTP_ACCEPT') &&
7678                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7679                 # browser (feed reader) prefers text/xml
7680                 $content_type = 'text/xml';
7681         }
7682         if (defined($commitlist[0])) {
7683                 %latest_commit = %{$commitlist[0]};
7684                 my $latest_epoch = $latest_commit{'committer_epoch'};
7685                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7686                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7687                 if (defined $if_modified) {
7688                         my $since;
7689                         if (eval { require HTTP::Date; 1; }) {
7690                                 $since = HTTP::Date::str2time($if_modified);
7691                         } elsif (eval { require Time::ParseDate; 1; }) {
7692                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7693                         }
7694                         if (defined $since && $latest_epoch <= $since) {
7695                                 print $cgi->header(
7696                                         -type => $content_type,
7697                                         -charset => 'utf-8',
7698                                         -last_modified => $latest_date{'rfc2822'},
7699                                         -status => '304 Not Modified');
7700                                 return;
7701                         }
7702                 }
7703                 print $cgi->header(
7704                         -type => $content_type,
7705                         -charset => 'utf-8',
7706                         -last_modified => $latest_date{'rfc2822'});
7707         } else {
7708                 print $cgi->header(
7709                         -type => $content_type,
7710                         -charset => 'utf-8');
7711         }
7712
7713         # Optimization: skip generating the body if client asks only
7714         # for Last-Modified date.
7715         return if ($cgi->request_method() eq 'HEAD');
7716
7717         # header variables
7718         my $title = "$site_name - $project/$action";
7719         my $feed_type = 'log';
7720         if (defined $hash) {
7721                 $title .= " - '$hash'";
7722                 $feed_type = 'branch log';
7723                 if (defined $file_name) {
7724                         $title .= " :: $file_name";
7725                         $feed_type = 'history';
7726                 }
7727         } elsif (defined $file_name) {
7728                 $title .= " - $file_name";
7729                 $feed_type = 'history';
7730         }
7731         $title .= " $feed_type";
7732         my $descr = git_get_project_description($project);
7733         if (defined $descr) {
7734                 $descr = esc_html($descr);
7735         } else {
7736                 $descr = "$project " .
7737                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7738                          " feed";
7739         }
7740         my $owner = git_get_project_owner($project);
7741         $owner = esc_html($owner);
7742
7743         #header
7744         my $alt_url;
7745         if (defined $file_name) {
7746                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7747         } elsif (defined $hash) {
7748                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7749         } else {
7750                 $alt_url = href(-full=>1, action=>"summary");
7751         }
7752         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7753         if ($format eq 'rss') {
7754                 print <<XML;
7755 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7756 <channel>
7757 XML
7758                 print "<title>$title</title>\n" .
7759                       "<link>$alt_url</link>\n" .
7760                       "<description>$descr</description>\n" .
7761                       "<language>en</language>\n" .
7762                       # project owner is responsible for 'editorial' content
7763                       "<managingEditor>$owner</managingEditor>\n";
7764                 if (defined $logo || defined $favicon) {
7765                         # prefer the logo to the favicon, since RSS
7766                         # doesn't allow both
7767                         my $img = esc_url($logo || $favicon);
7768                         print "<image>\n" .
7769                               "<url>$img</url>\n" .
7770                               "<title>$title</title>\n" .
7771                               "<link>$alt_url</link>\n" .
7772                               "</image>\n";
7773                 }
7774                 if (%latest_date) {
7775                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7776                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7777                 }
7778                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7779         } elsif ($format eq 'atom') {
7780                 print <<XML;
7781 <feed xmlns="http://www.w3.org/2005/Atom">
7782 XML
7783                 print "<title>$title</title>\n" .
7784                       "<subtitle>$descr</subtitle>\n" .
7785                       '<link rel="alternate" type="text/html" href="' .
7786                       $alt_url . '" />' . "\n" .
7787                       '<link rel="self" type="' . $content_type . '" href="' .
7788                       $cgi->self_url() . '" />' . "\n" .
7789                       "<id>" . href(-full=>1) . "</id>\n" .
7790                       # use project owner for feed author
7791                       "<author><name>$owner</name></author>\n";
7792                 if (defined $favicon) {
7793                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7794                 }
7795                 if (defined $logo) {
7796                         # not twice as wide as tall: 72 x 27 pixels
7797                         print "<logo>" . esc_url($logo) . "</logo>\n";
7798                 }
7799                 if (! %latest_date) {
7800                         # dummy date to keep the feed valid until commits trickle in:
7801                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7802                 } else {
7803                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7804                 }
7805                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7806         }
7807
7808         # contents
7809         for (my $i = 0; $i <= $#commitlist; $i++) {
7810                 my %co = %{$commitlist[$i]};
7811                 my $commit = $co{'id'};
7812                 # we read 150, we always show 30 and the ones more recent than 48 hours
7813                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7814                         last;
7815                 }
7816                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7817
7818                 # get list of changed files
7819                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7820                         $co{'parent'} || "--root",
7821                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7822                         or next;
7823                 my @difftree = map { chomp; $_ } <$fd>;
7824                 close $fd
7825                         or next;
7826
7827                 # print element (entry, item)
7828                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7829                 if ($format eq 'rss') {
7830                         print "<item>\n" .
7831                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7832                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7833                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7834                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7835                               "<link>$co_url</link>\n" .
7836                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7837                               "<content:encoded>" .
7838                               "<![CDATA[\n";
7839                 } elsif ($format eq 'atom') {
7840                         print "<entry>\n" .
7841                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7842                               "<updated>$cd{'iso-8601'}</updated>\n" .
7843                               "<author>\n" .
7844                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7845                         if ($co{'author_email'}) {
7846                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7847                         }
7848                         print "</author>\n" .
7849                               # use committer for contributor
7850                               "<contributor>\n" .
7851                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7852                         if ($co{'committer_email'}) {
7853                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7854                         }
7855                         print "</contributor>\n" .
7856                               "<published>$cd{'iso-8601'}</published>\n" .
7857                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7858                               "<id>$co_url</id>\n" .
7859                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7860                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7861                 }
7862                 my $comment = $co{'comment'};
7863                 print "<pre>\n";
7864                 foreach my $line (@$comment) {
7865                         $line = esc_html($line);
7866                         print "$line\n";
7867                 }
7868                 print "</pre><ul>\n";
7869                 foreach my $difftree_line (@difftree) {
7870                         my %difftree = parse_difftree_raw_line($difftree_line);
7871                         next if !$difftree{'from_id'};
7872
7873                         my $file = $difftree{'file'} || $difftree{'to_file'};
7874
7875                         print "<li>" .
7876                               "[" .
7877                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7878                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7879                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7880                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7881                                       -title => "diff"}, 'D');
7882                         if ($have_blame) {
7883                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7884                                                              file_name=>$file, hash_base=>$commit),
7885                                               -title => "blame"}, 'B');
7886                         }
7887                         # if this is not a feed of a file history
7888                         if (!defined $file_name || $file_name ne $file) {
7889                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7890                                                              file_name=>$file, hash=>$commit),
7891                                               -title => "history"}, 'H');
7892                         }
7893                         $file = esc_path($file);
7894                         print "] ".
7895                               "$file</li>\n";
7896                 }
7897                 if ($format eq 'rss') {
7898                         print "</ul>]]>\n" .
7899                               "</content:encoded>\n" .
7900                               "</item>\n";
7901                 } elsif ($format eq 'atom') {
7902                         print "</ul>\n</div>\n" .
7903                               "</content>\n" .
7904                               "</entry>\n";
7905                 }
7906         }
7907
7908         # end of feed
7909         if ($format eq 'rss') {
7910                 print "</channel>\n</rss>\n";
7911         } elsif ($format eq 'atom') {
7912                 print "</feed>\n";
7913         }
7914 }
7915
7916 sub git_rss {
7917         git_feed('rss');
7918 }
7919
7920 sub git_atom {
7921         git_feed('atom');
7922 }
7923
7924 sub git_opml {
7925         my @list = git_get_projects_list($project_filter, $strict_export);
7926         if (!@list) {
7927                 die_error(404, "No projects found");
7928         }
7929
7930         print $cgi->header(
7931                 -type => 'text/xml',
7932                 -charset => 'utf-8',
7933                 -content_disposition => 'inline; filename="opml.xml"');
7934
7935         my $title = esc_html($site_name);
7936         my $filter = " within subdirectory ";
7937         if (defined $project_filter) {
7938                 $filter .= esc_html($project_filter);
7939         } else {
7940                 $filter = "";
7941         }
7942         print <<XML;
7943 <?xml version="1.0" encoding="utf-8"?>
7944 <opml version="1.0">
7945 <head>
7946   <title>$title OPML Export$filter</title>
7947 </head>
7948 <body>
7949 <outline text="git RSS feeds">
7950 XML
7951
7952         foreach my $pr (@list) {
7953                 my %proj = %$pr;
7954                 my $head = git_get_head_hash($proj{'path'});
7955                 if (!defined $head) {
7956                         next;
7957                 }
7958                 $git_dir = "$projectroot/$proj{'path'}";
7959                 my %co = parse_commit($head);
7960                 if (!%co) {
7961                         next;
7962                 }
7963
7964                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7965                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7966                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7967                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7968         }
7969         print <<XML;
7970 </outline>
7971 </body>
7972 </opml>
7973 XML
7974 }