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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # Path to the highlight executable to use (must be the one from
 169 # http://www.andre-simon.de due to assumptions about parameters and output).
 170 # Useful if highlight is not installed on your webserver's PATH.
 171 # [Default: highlight]
 172 our $highlight_bin = "++HIGHLIGHT_BIN++";
 173
 174 # information about snapshot formats that gitweb is capable of serving
 175 our %known_snapshot_formats = (
 176         # name => {
 177         #       'display' => display name,
 178         #       'type' => mime type,
 179         #       'suffix' => filename suffix,
 180         #       'format' => --format for git-archive,
 181         #       'compressor' => [compressor command and arguments]
 182         #                       (array reference, optional)
 183         #       'disabled' => boolean (optional)}
 184         #
 185         'tgz' => {
 186                 'display' => 'tar.gz',
 187                 'type' => 'application/x-gzip',
 188                 'suffix' => '.tar.gz',
 189                 'format' => 'tar',
 190                 'compressor' => ['gzip']},
 191
 192         'tbz2' => {
 193                 'display' => 'tar.bz2',
 194                 'type' => 'application/x-bzip2',
 195                 'suffix' => '.tar.bz2',
 196                 'format' => 'tar',
 197                 'compressor' => ['bzip2']},
 198
 199         'txz' => {
 200                 'display' => 'tar.xz',
 201                 'type' => 'application/x-xz',
 202                 'suffix' => '.tar.xz',
 203                 'format' => 'tar',
 204                 'compressor' => ['xz'],
 205                 'disabled' => 1},
 206
 207         'zip' => {
 208                 'display' => 'zip',
 209                 'type' => 'application/x-zip',
 210                 'suffix' => '.zip',
 211                 'format' => 'zip'},
 212 );
 213
 214 # Aliases so we understand old gitweb.snapshot values in repository
 215 # configuration.
 216 our %known_snapshot_format_aliases = (
 217         'gzip'  => 'tgz',
 218         'bzip2' => 'tbz2',
 219         'xz'    => 'txz',
 220
 221         # backward compatibility: legacy gitweb config support
 222         'x-gzip' => undef, 'gz' => undef,
 223         'x-bzip2' => undef, 'bz2' => undef,
 224         'x-zip' => undef, '' => undef,
 225 );
 226
 227 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 228 # are changed, it may be appropriate to change these values too via
 229 # $GITWEB_CONFIG.
 230 our %avatar_size = (
 231         'default' => 16,
 232         'double'  => 32
 233 );
 234
 235 # Used to set the maximum load that we will still respond to gitweb queries.
 236 # If server load exceed this value then return "503 server busy" error.
 237 # If gitweb cannot determined server load, it is taken to be 0.
 238 # Leave it undefined (or set to 'undef') to turn off load checking.
 239 our $maxload = 300;
 240
 241 # configuration for 'highlight' (http://www.andre-simon.de/)
 242 # match by basename
 243 our %highlight_basename = (
 244         #'Program' => 'py',
 245         #'Library' => 'py',
 246         'SConstruct' => 'py', # SCons equivalent of Makefile
 247         'Makefile' => 'make',
 248 );
 249 # match by extension
 250 our %highlight_ext = (
 251         # main extensions, defining name of syntax;
 252         # see files in /usr/share/highlight/langDefs/ directory
 253         map { $_ => $_ }
 254                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         'mak' => 'make',
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 616 sub evaluate_gitweb_config {
 617         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 618         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 619         # die if there are errors parsing config file
 620         if (-e $GITWEB_CONFIG) {
 621                 do $GITWEB_CONFIG;
 622                 die $@ if $@;
 623         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 624                 do $GITWEB_CONFIG_SYSTEM;
 625                 die $@ if $@;
 626         }
 627 }
 628
 629 # Get loadavg of system, to compare against $maxload.
 630 # Currently it requires '/proc/loadavg' present to get loadavg;
 631 # if it is not present it returns 0, which means no load checking.
 632 sub get_loadavg {
 633         if( -e '/proc/loadavg' ){
 634                 open my $fd, '<', '/proc/loadavg'
 635                         or return 0;
 636                 my @load = split(/\s+/, scalar <$fd>);
 637                 close $fd;
 638
 639                 # The first three columns measure CPU and IO utilization of the last one,
 640                 # five, and 10 minute periods.  The fourth column shows the number of
 641                 # currently running processes and the total number of processes in the m/n
 642                 # format.  The last column displays the last process ID used.
 643                 return $load[0] || 0;
 644         }
 645         # additional checks for load average should go here for things that don't export
 646         # /proc/loadavg
 647
 648         return 0;
 649 }
 650
 651 # version of the core git binary
 652 our $git_version;
 653 sub evaluate_git_version {
 654         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 655         $number_of_git_cmds++;
 656 }
 657
 658 sub check_loadavg {
 659         if (defined $maxload && get_loadavg() > $maxload) {
 660                 die_error(503, "The load average on the server is too high");
 661         }
 662 }
 663
 664 # ======================================================================
 665 # input validation and dispatch
 666
 667 # input parameters can be collected from a variety of sources (presently, CGI
 668 # and PATH_INFO), so we define an %input_params hash that collects them all
 669 # together during validation: this allows subsequent uses (e.g. href()) to be
 670 # agnostic of the parameter origin
 671
 672 our %input_params = ();
 673
 674 # input parameters are stored with the long parameter name as key. This will
 675 # also be used in the href subroutine to convert parameters to their CGI
 676 # equivalent, and since the href() usage is the most frequent one, we store
 677 # the name -> CGI key mapping here, instead of the reverse.
 678 #
 679 # XXX: Warning: If you touch this, check the search form for updating,
 680 # too.
 681
 682 our @cgi_param_mapping = (
 683         project => "p",
 684         action => "a",
 685         file_name => "f",
 686         file_parent => "fp",
 687         hash => "h",
 688         hash_parent => "hp",
 689         hash_base => "hb",
 690         hash_parent_base => "hpb",
 691         page => "pg",
 692         order => "o",
 693         searchtext => "s",
 694         searchtype => "st",
 695         snapshot_format => "sf",
 696         extra_options => "opt",
 697         search_use_regexp => "sr",
 698         # this must be last entry (for manipulation from JavaScript)
 699         javascript => "js"
 700 );
 701 our %cgi_param_mapping = @cgi_param_mapping;
 702
 703 # we will also need to know the possible actions, for validation
 704 our %actions = (
 705         "blame" => \&git_blame,
 706         "blame_incremental" => \&git_blame_incremental,
 707         "blame_data" => \&git_blame_data,
 708         "blobdiff" => \&git_blobdiff,
 709         "blobdiff_plain" => \&git_blobdiff_plain,
 710         "blob" => \&git_blob,
 711         "blob_plain" => \&git_blob_plain,
 712         "commitdiff" => \&git_commitdiff,
 713         "commitdiff_plain" => \&git_commitdiff_plain,
 714         "commit" => \&git_commit,
 715         "forks" => \&git_forks,
 716         "heads" => \&git_heads,
 717         "history" => \&git_history,
 718         "log" => \&git_log,
 719         "patch" => \&git_patch,
 720         "patches" => \&git_patches,
 721         "remotes" => \&git_remotes,
 722         "rss" => \&git_rss,
 723         "atom" => \&git_atom,
 724         "search" => \&git_search,
 725         "search_help" => \&git_search_help,
 726         "shortlog" => \&git_shortlog,
 727         "summary" => \&git_summary,
 728         "tag" => \&git_tag,
 729         "tags" => \&git_tags,
 730         "tree" => \&git_tree,
 731         "snapshot" => \&git_snapshot,
 732         "object" => \&git_object,
 733         # those below don't need $project
 734         "opml" => \&git_opml,
 735         "project_list" => \&git_project_list,
 736         "project_index" => \&git_project_index,
 737 );
 738
 739 # finally, we have the hash of allowed extra_options for the commands that
 740 # allow them
 741 our %allowed_options = (
 742         "--no-merges" => [ qw(rss atom log shortlog history) ],
 743 );
 744
 745 # fill %input_params with the CGI parameters. All values except for 'opt'
 746 # should be single values, but opt can be an array. We should probably
 747 # build an array of parameters that can be multi-valued, but since for the time
 748 # being it's only this one, we just single it out
 749 sub evaluate_query_params {
 750         our $cgi;
 751
 752         while (my ($name, $symbol) = each %cgi_param_mapping) {
 753                 if ($symbol eq 'opt') {
 754                         $input_params{$name} = [ $cgi->param($symbol) ];
 755                 } else {
 756                         $input_params{$name} = $cgi->param($symbol);
 757                 }
 758         }
 759 }
 760
 761 # now read PATH_INFO and update the parameter list for missing parameters
 762 sub evaluate_path_info {
 763         return if defined $input_params{'project'};
 764         return if !$path_info;
 765         $path_info =~ s,^/+,,;
 766         return if !$path_info;
 767
 768         # find which part of PATH_INFO is project
 769         my $project = $path_info;
 770         $project =~ s,/+$,,;
 771         while ($project && !check_head_link("$projectroot/$project")) {
 772                 $project =~ s,/*[^/]*$,,;
 773         }
 774         return unless $project;
 775         $input_params{'project'} = $project;
 776
 777         # do not change any parameters if an action is given using the query string
 778         return if $input_params{'action'};
 779         $path_info =~ s,^\Q$project\E/*,,;
 780
 781         # next, check if we have an action
 782         my $action = $path_info;
 783         $action =~ s,/.*$,,;
 784         if (exists $actions{$action}) {
 785                 $path_info =~ s,^$action/*,,;
 786                 $input_params{'action'} = $action;
 787         }
 788
 789         # list of actions that want hash_base instead of hash, but can have no
 790         # pathname (f) parameter
 791         my @wants_base = (
 792                 'tree',
 793                 'history',
 794         );
 795
 796         # we want to catch, among others
 797         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 798         my ($parentrefname, $parentpathname, $refname, $pathname) =
 799                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 800
 801         # first, analyze the 'current' part
 802         if (defined $pathname) {
 803                 # we got "branch:filename" or "branch:dir/"
 804                 # we could use git_get_type(branch:pathname), but:
 805                 # - it needs $git_dir
 806                 # - it does a git() call
 807                 # - the convention of terminating directories with a slash
 808                 #   makes it superfluous
 809                 # - embedding the action in the PATH_INFO would make it even
 810                 #   more superfluous
 811                 $pathname =~ s,^/+,,;
 812                 if (!$pathname || substr($pathname, -1) eq "/") {
 813                         $input_params{'action'} ||= "tree";
 814                         $pathname =~ s,/$,,;
 815                 } else {
 816                         # the default action depends on whether we had parent info
 817                         # or not
 818                         if ($parentrefname) {
 819                                 $input_params{'action'} ||= "blobdiff_plain";
 820                         } else {
 821                                 $input_params{'action'} ||= "blob_plain";
 822                         }
 823                 }
 824                 $input_params{'hash_base'} ||= $refname;
 825                 $input_params{'file_name'} ||= $pathname;
 826         } elsif (defined $refname) {
 827                 # we got "branch". In this case we have to choose if we have to
 828                 # set hash or hash_base.
 829                 #
 830                 # Most of the actions without a pathname only want hash to be
 831                 # set, except for the ones specified in @wants_base that want
 832                 # hash_base instead. It should also be noted that hand-crafted
 833                 # links having 'history' as an action and no pathname or hash
 834                 # set will fail, but that happens regardless of PATH_INFO.
 835                 if (defined $parentrefname) {
 836                         # if there is parent let the default be 'shortlog' action
 837                         # (for http://git.example.com/repo.git/A..B links); if there
 838                         # is no parent, dispatch will detect type of object and set
 839                         # action appropriately if required (if action is not set)
 840                         $input_params{'action'} ||= "shortlog";
 841                 }
 842                 if ($input_params{'action'} &&
 843                     grep { $_ eq $input_params{'action'} } @wants_base) {
 844                         $input_params{'hash_base'} ||= $refname;
 845                 } else {
 846                         $input_params{'hash'} ||= $refname;
 847                 }
 848         }
 849
 850         # next, handle the 'parent' part, if present
 851         if (defined $parentrefname) {
 852                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 853                 # someproject/blobdiff/oldrev..newrev:/filename
 854                 if ($parentpathname) {
 855                         $parentpathname =~ s,^/+,,;
 856                         $parentpathname =~ s,/$,,;
 857                         $input_params{'file_parent'} ||= $parentpathname;
 858                 } else {
 859                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 860                 }
 861                 # we assume that hash_parent_base is wanted if a path was specified,
 862                 # or if the action wants hash_base instead of hash
 863                 if (defined $input_params{'file_parent'} ||
 864                         grep { $_ eq $input_params{'action'} } @wants_base) {
 865                         $input_params{'hash_parent_base'} ||= $parentrefname;
 866                 } else {
 867                         $input_params{'hash_parent'} ||= $parentrefname;
 868                 }
 869         }
 870
 871         # for the snapshot action, we allow URLs in the form
 872         # $project/snapshot/$hash.ext
 873         # where .ext determines the snapshot and gets removed from the
 874         # passed $refname to provide the $hash.
 875         #
 876         # To be able to tell that $refname includes the format extension, we
 877         # require the following two conditions to be satisfied:
 878         # - the hash input parameter MUST have been set from the $refname part
 879         #   of the URL (i.e. they must be equal)
 880         # - the snapshot format MUST NOT have been defined already (e.g. from
 881         #   CGI parameter sf)
 882         # It's also useless to try any matching unless $refname has a dot,
 883         # so we check for that too
 884         if (defined $input_params{'action'} &&
 885                 $input_params{'action'} eq 'snapshot' &&
 886                 defined $refname && index($refname, '.') != -1 &&
 887                 $refname eq $input_params{'hash'} &&
 888                 !defined $input_params{'snapshot_format'}) {
 889                 # We loop over the known snapshot formats, checking for
 890                 # extensions. Allowed extensions are both the defined suffix
 891                 # (which includes the initial dot already) and the snapshot
 892                 # format key itself, with a prepended dot
 893                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 894                         my $hash = $refname;
 895                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 896                                 next;
 897                         }
 898                         my $sfx = $1;
 899                         # a valid suffix was found, so set the snapshot format
 900                         # and reset the hash parameter
 901                         $input_params{'snapshot_format'} = $fmt;
 902                         $input_params{'hash'} = $hash;
 903                         # we also set the format suffix to the one requested
 904                         # in the URL: this way a request for e.g. .tgz returns
 905                         # a .tgz instead of a .tar.gz
 906                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 907                         last;
 908                 }
 909         }
 910 }
 911
 912 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 913      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 914      $searchtext, $search_regexp);
 915 sub evaluate_and_validate_params {
 916         our $action = $input_params{'action'};
 917         if (defined $action) {
 918                 if (!validate_action($action)) {
 919                         die_error(400, "Invalid action parameter");
 920                 }
 921         }
 922
 923         # parameters which are pathnames
 924         our $project = $input_params{'project'};
 925         if (defined $project) {
 926                 if (!validate_project($project)) {
 927                         undef $project;
 928                         die_error(404, "No such project");
 929                 }
 930         }
 931
 932         our $file_name = $input_params{'file_name'};
 933         if (defined $file_name) {
 934                 if (!validate_pathname($file_name)) {
 935                         die_error(400, "Invalid file parameter");
 936                 }
 937         }
 938
 939         our $file_parent = $input_params{'file_parent'};
 940         if (defined $file_parent) {
 941                 if (!validate_pathname($file_parent)) {
 942                         die_error(400, "Invalid file parent parameter");
 943                 }
 944         }
 945
 946         # parameters which are refnames
 947         our $hash = $input_params{'hash'};
 948         if (defined $hash) {
 949                 if (!validate_refname($hash)) {
 950                         die_error(400, "Invalid hash parameter");
 951                 }
 952         }
 953
 954         our $hash_parent = $input_params{'hash_parent'};
 955         if (defined $hash_parent) {
 956                 if (!validate_refname($hash_parent)) {
 957                         die_error(400, "Invalid hash parent parameter");
 958                 }
 959         }
 960
 961         our $hash_base = $input_params{'hash_base'};
 962         if (defined $hash_base) {
 963                 if (!validate_refname($hash_base)) {
 964                         die_error(400, "Invalid hash base parameter");
 965                 }
 966         }
 967
 968         our @extra_options = @{$input_params{'extra_options'}};
 969         # @extra_options is always defined, since it can only be (currently) set from
 970         # CGI, and $cgi->param() returns the empty array in array context if the param
 971         # is not set
 972         foreach my $opt (@extra_options) {
 973                 if (not exists $allowed_options{$opt}) {
 974                         die_error(400, "Invalid option parameter");
 975                 }
 976                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 977                         die_error(400, "Invalid option parameter for this action");
 978                 }
 979         }
 980
 981         our $hash_parent_base = $input_params{'hash_parent_base'};
 982         if (defined $hash_parent_base) {
 983                 if (!validate_refname($hash_parent_base)) {
 984                         die_error(400, "Invalid hash parent base parameter");
 985                 }
 986         }
 987
 988         # other parameters
 989         our $page = $input_params{'page'};
 990         if (defined $page) {
 991                 if ($page =~ m/[^0-9]/) {
 992                         die_error(400, "Invalid page parameter");
 993                 }
 994         }
 995
 996         our $searchtype = $input_params{'searchtype'};
 997         if (defined $searchtype) {
 998                 if ($searchtype =~ m/[^a-z]/) {
 999                         die_error(400, "Invalid searchtype parameter");
1000                 }
1001         }
1002
1003         our $search_use_regexp = $input_params{'search_use_regexp'};
1004
1005         our $searchtext = $input_params{'searchtext'};
1006         our $search_regexp;
1007         if (defined $searchtext) {
1008                 if (length($searchtext) < 2) {
1009                         die_error(403, "At least two characters are required for search parameter");
1010                 }
1011                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1012         }
1013 }
1014
1015 # path to the current git repository
1016 our $git_dir;
1017 sub evaluate_git_dir {
1018         our $git_dir = "$projectroot/$project" if $project;
1019 }
1020
1021 our (@snapshot_fmts, $git_avatar);
1022 sub configure_gitweb_features {
1023         # list of supported snapshot formats
1024         our @snapshot_fmts = gitweb_get_feature('snapshot');
1025         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1026
1027         # check that the avatar feature is set to a known provider name,
1028         # and for each provider check if the dependencies are satisfied.
1029         # if the provider name is invalid or the dependencies are not met,
1030         # reset $git_avatar to the empty string.
1031         our ($git_avatar) = gitweb_get_feature('avatar');
1032         if ($git_avatar eq 'gravatar') {
1033                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1034         } elsif ($git_avatar eq 'picon') {
1035                 # no dependencies
1036         } else {
1037                 $git_avatar = '';
1038         }
1039 }
1040
1041 # custom error handler: 'die <message>' is Internal Server Error
1042 sub handle_errors_html {
1043         my $msg = shift; # it is already HTML escaped
1044
1045         # to avoid infinite loop where error occurs in die_error,
1046         # change handler to default handler, disabling handle_errors_html
1047         set_message("Error occured when inside die_error:\n$msg");
1048
1049         # you cannot jump out of die_error when called as error handler;
1050         # the subroutine set via CGI::Carp::set_message is called _after_
1051         # HTTP headers are already written, so it cannot write them itself
1052         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1053 }
1054 set_message(\&handle_errors_html);
1055
1056 # dispatch
1057 sub dispatch {
1058         if (!defined $action) {
1059                 if (defined $hash) {
1060                         $action = git_get_type($hash);
1061                 } elsif (defined $hash_base && defined $file_name) {
1062                         $action = git_get_type("$hash_base:$file_name");
1063                 } elsif (defined $project) {
1064                         $action = 'summary';
1065                 } else {
1066                         $action = 'project_list';
1067                 }
1068         }
1069         if (!defined($actions{$action})) {
1070                 die_error(400, "Unknown action");
1071         }
1072         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1073             !$project) {
1074                 die_error(400, "Project needed");
1075         }
1076         $actions{$action}->();
1077 }
1078
1079 sub reset_timer {
1080         our $t0 = [ gettimeofday() ]
1081                 if defined $t0;
1082         our $number_of_git_cmds = 0;
1083 }
1084
1085 sub run_request {
1086         reset_timer();
1087
1088         evaluate_uri();
1089         evaluate_gitweb_config();
1090         evaluate_git_version();
1091         check_loadavg();
1092
1093         # $projectroot and $projects_list might be set in gitweb config file
1094         $projects_list ||= $projectroot;
1095
1096         evaluate_query_params();
1097         evaluate_path_info();
1098         evaluate_and_validate_params();
1099         evaluate_git_dir();
1100
1101         configure_gitweb_features();
1102
1103         dispatch();
1104 }
1105
1106 our $is_last_request = sub { 1 };
1107 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1108 our $CGI = 'CGI';
1109 our $cgi;
1110 sub configure_as_fcgi {
1111         require CGI::Fast;
1112         our $CGI = 'CGI::Fast';
1113
1114         my $request_number = 0;
1115         # let each child service 100 requests
1116         our $is_last_request = sub { ++$request_number > 100 };
1117 }
1118 sub evaluate_argv {
1119         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1120         configure_as_fcgi()
1121                 if $script_name =~ /\.fcgi$/;
1122
1123         return unless (@ARGV);
1124
1125         require Getopt::Long;
1126         Getopt::Long::GetOptions(
1127                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1128                 'nproc|n=i' => sub {
1129                         my ($arg, $val) = @_;
1130                         return unless eval { require FCGI::ProcManager; 1; };
1131                         my $proc_manager = FCGI::ProcManager->new({
1132                                 n_processes => $val,
1133                         });
1134                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1135                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1136                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1137                 },
1138         );
1139 }
1140
1141 sub run {
1142         evaluate_argv();
1143
1144         $pre_listen_hook->()
1145                 if $pre_listen_hook;
1146
1147  REQUEST:
1148         while ($cgi = $CGI->new()) {
1149                 $pre_dispatch_hook->()
1150                         if $pre_dispatch_hook;
1151
1152                 run_request();
1153
1154                 $post_dispatch_hook->()
1155                         if $post_dispatch_hook;
1156
1157                 last REQUEST if ($is_last_request->());
1158         }
1159
1160  DONE_GITWEB:
1161         1;
1162 }
1163
1164 run();
1165
1166 if (defined caller) {
1167         # wrapped in a subroutine processing requests,
1168         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1169         return;
1170 } else {
1171         # pure CGI script, serving single request
1172         exit;
1173 }
1174
1175 ## ======================================================================
1176 ## action links
1177
1178 # possible values of extra options
1179 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1180 # -replay => 1      - start from a current view (replay with modifications)
1181 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1182 sub href {
1183         my %params = @_;
1184         # default is to use -absolute url() i.e. $my_uri
1185         my $href = $params{-full} ? $my_url : $my_uri;
1186
1187         $params{'project'} = $project unless exists $params{'project'};
1188
1189         if ($params{-replay}) {
1190                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1191                         if (!exists $params{$name}) {
1192                                 $params{$name} = $input_params{$name};
1193                         }
1194                 }
1195         }
1196
1197         my $use_pathinfo = gitweb_check_feature('pathinfo');
1198         if (defined $params{'project'} &&
1199             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1200                 # try to put as many parameters as possible in PATH_INFO:
1201                 #   - project name
1202                 #   - action
1203                 #   - hash_parent or hash_parent_base:/file_parent
1204                 #   - hash or hash_base:/filename
1205                 #   - the snapshot_format as an appropriate suffix
1206
1207                 # When the script is the root DirectoryIndex for the domain,
1208                 # $href here would be something like http://gitweb.example.com/
1209                 # Thus, we strip any trailing / from $href, to spare us double
1210                 # slashes in the final URL
1211                 $href =~ s,/$,,;
1212
1213                 # Then add the project name, if present
1214                 $href .= "/".esc_url($params{'project'});
1215                 delete $params{'project'};
1216
1217                 # since we destructively absorb parameters, we keep this
1218                 # boolean that remembers if we're handling a snapshot
1219                 my $is_snapshot = $params{'action'} eq 'snapshot';
1220
1221                 # Summary just uses the project path URL, any other action is
1222                 # added to the URL
1223                 if (defined $params{'action'}) {
1224                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1225                         delete $params{'action'};
1226                 }
1227
1228                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1229                 # stripping nonexistent or useless pieces
1230                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1231                         || $params{'hash_parent'} || $params{'hash'});
1232                 if (defined $params{'hash_base'}) {
1233                         if (defined $params{'hash_parent_base'}) {
1234                                 $href .= esc_url($params{'hash_parent_base'});
1235                                 # skip the file_parent if it's the same as the file_name
1236                                 if (defined $params{'file_parent'}) {
1237                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1238                                                 delete $params{'file_parent'};
1239                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1240                                                 $href .= ":/".esc_url($params{'file_parent'});
1241                                                 delete $params{'file_parent'};
1242                                         }
1243                                 }
1244                                 $href .= "..";
1245                                 delete $params{'hash_parent'};
1246                                 delete $params{'hash_parent_base'};
1247                         } elsif (defined $params{'hash_parent'}) {
1248                                 $href .= esc_url($params{'hash_parent'}). "..";
1249                                 delete $params{'hash_parent'};
1250                         }
1251
1252                         $href .= esc_url($params{'hash_base'});
1253                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1254                                 $href .= ":/".esc_url($params{'file_name'});
1255                                 delete $params{'file_name'};
1256                         }
1257                         delete $params{'hash'};
1258                         delete $params{'hash_base'};
1259                 } elsif (defined $params{'hash'}) {
1260                         $href .= esc_url($params{'hash'});
1261                         delete $params{'hash'};
1262                 }
1263
1264                 # If the action was a snapshot, we can absorb the
1265                 # snapshot_format parameter too
1266                 if ($is_snapshot) {
1267                         my $fmt = $params{'snapshot_format'};
1268                         # snapshot_format should always be defined when href()
1269                         # is called, but just in case some code forgets, we
1270                         # fall back to the default
1271                         $fmt ||= $snapshot_fmts[0];
1272                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1273                         delete $params{'snapshot_format'};
1274                 }
1275         }
1276
1277         # now encode the parameters explicitly
1278         my @result = ();
1279         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1280                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1281                 if (defined $params{$name}) {
1282                         if (ref($params{$name}) eq "ARRAY") {
1283                                 foreach my $par (@{$params{$name}}) {
1284                                         push @result, $symbol . "=" . esc_param($par);
1285                                 }
1286                         } else {
1287                                 push @result, $symbol . "=" . esc_param($params{$name});
1288                         }
1289                 }
1290         }
1291         $href .= "?" . join(';', @result) if scalar @result;
1292
1293         return $href;
1294 }
1295
1296
1297 ## ======================================================================
1298 ## validation, quoting/unquoting and escaping
1299
1300 sub validate_action {
1301         my $input = shift || return undef;
1302         return undef unless exists $actions{$input};
1303         return $input;
1304 }
1305
1306 sub validate_project {
1307         my $input = shift || return undef;
1308         if (!validate_pathname($input) ||
1309                 !(-d "$projectroot/$input") ||
1310                 !check_export_ok("$projectroot/$input") ||
1311                 ($strict_export && !project_in_list($input))) {
1312                 return undef;
1313         } else {
1314                 return $input;
1315         }
1316 }
1317
1318 sub validate_pathname {
1319         my $input = shift || return undef;
1320
1321         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1322         # at the beginning, at the end, and between slashes.
1323         # also this catches doubled slashes
1324         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1325                 return undef;
1326         }
1327         # no null characters
1328         if ($input =~ m!\0!) {
1329                 return undef;
1330         }
1331         return $input;
1332 }
1333
1334 sub validate_refname {
1335         my $input = shift || return undef;
1336
1337         # textual hashes are O.K.
1338         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1339                 return $input;
1340         }
1341         # it must be correct pathname
1342         $input = validate_pathname($input)
1343                 or return undef;
1344         # restrictions on ref name according to git-check-ref-format
1345         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1346                 return undef;
1347         }
1348         return $input;
1349 }
1350
1351 # decode sequences of octets in utf8 into Perl's internal form,
1352 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1353 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1354 sub to_utf8 {
1355         my $str = shift;
1356         return undef unless defined $str;
1357         if (utf8::valid($str)) {
1358                 utf8::decode($str);
1359                 return $str;
1360         } else {
1361                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1362         }
1363 }
1364
1365 # quote unsafe chars, but keep the slash, even when it's not
1366 # correct, but quoted slashes look too horrible in bookmarks
1367 sub esc_param {
1368         my $str = shift;
1369         return undef unless defined $str;
1370         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1371         $str =~ s/ /\+/g;
1372         return $str;
1373 }
1374
1375 # quote unsafe chars in whole URL, so some characters cannot be quoted
1376 sub esc_url {
1377         my $str = shift;
1378         return undef unless defined $str;
1379         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1380         $str =~ s/ /\+/g;
1381         return $str;
1382 }
1383
1384 # replace invalid utf8 character with SUBSTITUTION sequence
1385 sub esc_html {
1386         my $str = shift;
1387         my %opts = @_;
1388
1389         return undef unless defined $str;
1390
1391         $str = to_utf8($str);
1392         $str = $cgi->escapeHTML($str);
1393         if ($opts{'-nbsp'}) {
1394                 $str =~ s/ /&nbsp;/g;
1395         }
1396         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1397         return $str;
1398 }
1399
1400 # quote control characters and escape filename to HTML
1401 sub esc_path {
1402         my $str = shift;
1403         my %opts = @_;
1404
1405         return undef unless defined $str;
1406
1407         $str = to_utf8($str);
1408         $str = $cgi->escapeHTML($str);
1409         if ($opts{'-nbsp'}) {
1410                 $str =~ s/ /&nbsp;/g;
1411         }
1412         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1413         return $str;
1414 }
1415
1416 # Make control characters "printable", using character escape codes (CEC)
1417 sub quot_cec {
1418         my $cntrl = shift;
1419         my %opts = @_;
1420         my %es = ( # character escape codes, aka escape sequences
1421                 "\t" => '\t',   # tab            (HT)
1422                 "\n" => '\n',   # line feed      (LF)
1423                 "\r" => '\r',   # carrige return (CR)
1424                 "\f" => '\f',   # form feed      (FF)
1425                 "\b" => '\b',   # backspace      (BS)
1426                 "\a" => '\a',   # alarm (bell)   (BEL)
1427                 "\e" => '\e',   # escape         (ESC)
1428                 "\013" => '\v', # vertical tab   (VT)
1429                 "\000" => '\0', # nul character  (NUL)
1430         );
1431         my $chr = ( (exists $es{$cntrl})
1432                     ? $es{$cntrl}
1433                     : sprintf('\%2x', ord($cntrl)) );
1434         if ($opts{-nohtml}) {
1435                 return $chr;
1436         } else {
1437                 return "<span class=\"cntrl\">$chr</span>";
1438         }
1439 }
1440
1441 # Alternatively use unicode control pictures codepoints,
1442 # Unicode "printable representation" (PR)
1443 sub quot_upr {
1444         my $cntrl = shift;
1445         my %opts = @_;
1446
1447         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1448         if ($opts{-nohtml}) {
1449                 return $chr;
1450         } else {
1451                 return "<span class=\"cntrl\">$chr</span>";
1452         }
1453 }
1454
1455 # git may return quoted and escaped filenames
1456 sub unquote {
1457         my $str = shift;
1458
1459         sub unq {
1460                 my $seq = shift;
1461                 my %es = ( # character escape codes, aka escape sequences
1462                         't' => "\t",   # tab            (HT, TAB)
1463                         'n' => "\n",   # newline        (NL)
1464                         'r' => "\r",   # return         (CR)
1465                         'f' => "\f",   # form feed      (FF)
1466                         'b' => "\b",   # backspace      (BS)
1467                         'a' => "\a",   # alarm (bell)   (BEL)
1468                         'e' => "\e",   # escape         (ESC)
1469                         'v' => "\013", # vertical tab   (VT)
1470                 );
1471
1472                 if ($seq =~ m/^[0-7]{1,3}$/) {
1473                         # octal char sequence
1474                         return chr(oct($seq));
1475                 } elsif (exists $es{$seq}) {
1476                         # C escape sequence, aka character escape code
1477                         return $es{$seq};
1478                 }
1479                 # quoted ordinary character
1480                 return $seq;
1481         }
1482
1483         if ($str =~ m/^"(.*)"$/) {
1484                 # needs unquoting
1485                 $str = $1;
1486                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1487         }
1488         return $str;
1489 }
1490
1491 # escape tabs (convert tabs to spaces)
1492 sub untabify {
1493         my $line = shift;
1494
1495         while ((my $pos = index($line, "\t")) != -1) {
1496                 if (my $count = (8 - ($pos % 8))) {
1497                         my $spaces = ' ' x $count;
1498                         $line =~ s/\t/$spaces/;
1499                 }
1500         }
1501
1502         return $line;
1503 }
1504
1505 sub project_in_list {
1506         my $project = shift;
1507         my @list = git_get_projects_list();
1508         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1509 }
1510
1511 ## ----------------------------------------------------------------------
1512 ## HTML aware string manipulation
1513
1514 # Try to chop given string on a word boundary between position
1515 # $len and $len+$add_len. If there is no word boundary there,
1516 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1517 # (marking chopped part) would be longer than given string.
1518 sub chop_str {
1519         my $str = shift;
1520         my $len = shift;
1521         my $add_len = shift || 10;
1522         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1523
1524         # Make sure perl knows it is utf8 encoded so we don't
1525         # cut in the middle of a utf8 multibyte char.
1526         $str = to_utf8($str);
1527
1528         # allow only $len chars, but don't cut a word if it would fit in $add_len
1529         # if it doesn't fit, cut it if it's still longer than the dots we would add
1530         # remove chopped character entities entirely
1531
1532         # when chopping in the middle, distribute $len into left and right part
1533         # return early if chopping wouldn't make string shorter
1534         if ($where eq 'center') {
1535                 return $str if ($len + 5 >= length($str)); # filler is length 5
1536                 $len = int($len/2);
1537         } else {
1538                 return $str if ($len + 4 >= length($str)); # filler is length 4
1539         }
1540
1541         # regexps: ending and beginning with word part up to $add_len
1542         my $endre = qr/.{$len}\w{0,$add_len}/;
1543         my $begre = qr/\w{0,$add_len}.{$len}/;
1544
1545         if ($where eq 'left') {
1546                 $str =~ m/^(.*?)($begre)$/;
1547                 my ($lead, $body) = ($1, $2);
1548                 if (length($lead) > 4) {
1549                         $lead = " ...";
1550                 }
1551                 return "$lead$body";
1552
1553         } elsif ($where eq 'center') {
1554                 $str =~ m/^($endre)(.*)$/;
1555                 my ($left, $str)  = ($1, $2);
1556                 $str =~ m/^(.*?)($begre)$/;
1557                 my ($mid, $right) = ($1, $2);
1558                 if (length($mid) > 5) {
1559                         $mid = " ... ";
1560                 }
1561                 return "$left$mid$right";
1562
1563         } else {
1564                 $str =~ m/^($endre)(.*)$/;
1565                 my $body = $1;
1566                 my $tail = $2;
1567                 if (length($tail) > 4) {
1568                         $tail = "... ";
1569                 }
1570                 return "$body$tail";
1571         }
1572 }
1573
1574 # takes the same arguments as chop_str, but also wraps a <span> around the
1575 # result with a title attribute if it does get chopped. Additionally, the
1576 # string is HTML-escaped.
1577 sub chop_and_escape_str {
1578         my ($str) = @_;
1579
1580         my $chopped = chop_str(@_);
1581         if ($chopped eq $str) {
1582                 return esc_html($chopped);
1583         } else {
1584                 $str =~ s/[[:cntrl:]]/?/g;
1585                 return $cgi->span({-title=>$str}, esc_html($chopped));
1586         }
1587 }
1588
1589 ## ----------------------------------------------------------------------
1590 ## functions returning short strings
1591
1592 # CSS class for given age value (in seconds)
1593 sub age_class {
1594         my $age = shift;
1595
1596         if (!defined $age) {
1597                 return "noage";
1598         } elsif ($age < 60*60*2) {
1599                 return "age0";
1600         } elsif ($age < 60*60*24*2) {
1601                 return "age1";
1602         } else {
1603                 return "age2";
1604         }
1605 }
1606
1607 # convert age in seconds to "nn units ago" string
1608 sub age_string {
1609         my $age = shift;
1610         my $age_str;
1611
1612         if ($age > 60*60*24*365*2) {
1613                 $age_str = (int $age/60/60/24/365);
1614                 $age_str .= " years ago";
1615         } elsif ($age > 60*60*24*(365/12)*2) {
1616                 $age_str = int $age/60/60/24/(365/12);
1617                 $age_str .= " months ago";
1618         } elsif ($age > 60*60*24*7*2) {
1619                 $age_str = int $age/60/60/24/7;
1620                 $age_str .= " weeks ago";
1621         } elsif ($age > 60*60*24*2) {
1622                 $age_str = int $age/60/60/24;
1623                 $age_str .= " days ago";
1624         } elsif ($age > 60*60*2) {
1625                 $age_str = int $age/60/60;
1626                 $age_str .= " hours ago";
1627         } elsif ($age > 60*2) {
1628                 $age_str = int $age/60;
1629                 $age_str .= " min ago";
1630         } elsif ($age > 2) {
1631                 $age_str = int $age;
1632                 $age_str .= " sec ago";
1633         } else {
1634                 $age_str .= " right now";
1635         }
1636         return $age_str;
1637 }
1638
1639 use constant {
1640         S_IFINVALID => 0030000,
1641         S_IFGITLINK => 0160000,
1642 };
1643
1644 # submodule/subproject, a commit object reference
1645 sub S_ISGITLINK {
1646         my $mode = shift;
1647
1648         return (($mode & S_IFMT) == S_IFGITLINK)
1649 }
1650
1651 # convert file mode in octal to symbolic file mode string
1652 sub mode_str {
1653         my $mode = oct shift;
1654
1655         if (S_ISGITLINK($mode)) {
1656                 return 'm---------';
1657         } elsif (S_ISDIR($mode & S_IFMT)) {
1658                 return 'drwxr-xr-x';
1659         } elsif (S_ISLNK($mode)) {
1660                 return 'lrwxrwxrwx';
1661         } elsif (S_ISREG($mode)) {
1662                 # git cares only about the executable bit
1663                 if ($mode & S_IXUSR) {
1664                         return '-rwxr-xr-x';
1665                 } else {
1666                         return '-rw-r--r--';
1667                 };
1668         } else {
1669                 return '----------';
1670         }
1671 }
1672
1673 # convert file mode in octal to file type string
1674 sub file_type {
1675         my $mode = shift;
1676
1677         if ($mode !~ m/^[0-7]+$/) {
1678                 return $mode;
1679         } else {
1680                 $mode = oct $mode;
1681         }
1682
1683         if (S_ISGITLINK($mode)) {
1684                 return "submodule";
1685         } elsif (S_ISDIR($mode & S_IFMT)) {
1686                 return "directory";
1687         } elsif (S_ISLNK($mode)) {
1688                 return "symlink";
1689         } elsif (S_ISREG($mode)) {
1690                 return "file";
1691         } else {
1692                 return "unknown";
1693         }
1694 }
1695
1696 # convert file mode in octal to file type description string
1697 sub file_type_long {
1698         my $mode = shift;
1699
1700         if ($mode !~ m/^[0-7]+$/) {
1701                 return $mode;
1702         } else {
1703                 $mode = oct $mode;
1704         }
1705
1706         if (S_ISGITLINK($mode)) {
1707                 return "submodule";
1708         } elsif (S_ISDIR($mode & S_IFMT)) {
1709                 return "directory";
1710         } elsif (S_ISLNK($mode)) {
1711                 return "symlink";
1712         } elsif (S_ISREG($mode)) {
1713                 if ($mode & S_IXUSR) {
1714                         return "executable";
1715                 } else {
1716                         return "file";
1717                 };
1718         } else {
1719                 return "unknown";
1720         }
1721 }
1722
1723
1724 ## ----------------------------------------------------------------------
1725 ## functions returning short HTML fragments, or transforming HTML fragments
1726 ## which don't belong to other sections
1727
1728 # format line of commit message.
1729 sub format_log_line_html {
1730         my $line = shift;
1731
1732         $line = esc_html($line, -nbsp=>1);
1733         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1734                 $cgi->a({-href => href(action=>"object", hash=>$1),
1735                                         -class => "text"}, $1);
1736         }eg;
1737
1738         return $line;
1739 }
1740
1741 # format marker of refs pointing to given object
1742
1743 # the destination action is chosen based on object type and current context:
1744 # - for annotated tags, we choose the tag view unless it's the current view
1745 #   already, in which case we go to shortlog view
1746 # - for other refs, we keep the current view if we're in history, shortlog or
1747 #   log view, and select shortlog otherwise
1748 sub format_ref_marker {
1749         my ($refs, $id) = @_;
1750         my $markers = '';
1751
1752         if (defined $refs->{$id}) {
1753                 foreach my $ref (@{$refs->{$id}}) {
1754                         # this code exploits the fact that non-lightweight tags are the
1755                         # only indirect objects, and that they are the only objects for which
1756                         # we want to use tag instead of shortlog as action
1757                         my ($type, $name) = qw();
1758                         my $indirect = ($ref =~ s/\^\{\}$//);
1759                         # e.g. tags/v2.6.11 or heads/next
1760                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1761                                 $type = $1;
1762                                 $name = $2;
1763                         } else {
1764                                 $type = "ref";
1765                                 $name = $ref;
1766                         }
1767
1768                         my $class = $type;
1769                         $class .= " indirect" if $indirect;
1770
1771                         my $dest_action = "shortlog";
1772
1773                         if ($indirect) {
1774                                 $dest_action = "tag" unless $action eq "tag";
1775                         } elsif ($action =~ /^(history|(short)?log)$/) {
1776                                 $dest_action = $action;
1777                         }
1778
1779                         my $dest = "";
1780                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1781                         $dest .= $ref;
1782
1783                         my $link = $cgi->a({
1784                                 -href => href(
1785                                         action=>$dest_action,
1786                                         hash=>$dest
1787                                 )}, $name);
1788
1789                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1790                                 $link . "</span>";
1791                 }
1792         }
1793
1794         if ($markers) {
1795                 return ' <span class="refs">'. $markers . '</span>';
1796         } else {
1797                 return "";
1798         }
1799 }
1800
1801 # format, perhaps shortened and with markers, title line
1802 sub format_subject_html {
1803         my ($long, $short, $href, $extra) = @_;
1804         $extra = '' unless defined($extra);
1805
1806         if (length($short) < length($long)) {
1807                 $long =~ s/[[:cntrl:]]/?/g;
1808                 return $cgi->a({-href => $href, -class => "list subject",
1809                                 -title => to_utf8($long)},
1810                        esc_html($short)) . $extra;
1811         } else {
1812                 return $cgi->a({-href => $href, -class => "list subject"},
1813                        esc_html($long)) . $extra;
1814         }
1815 }
1816
1817 # Rather than recomputing the url for an email multiple times, we cache it
1818 # after the first hit. This gives a visible benefit in views where the avatar
1819 # for the same email is used repeatedly (e.g. shortlog).
1820 # The cache is shared by all avatar engines (currently gravatar only), which
1821 # are free to use it as preferred. Since only one avatar engine is used for any
1822 # given page, there's no risk for cache conflicts.
1823 our %avatar_cache = ();
1824
1825 # Compute the picon url for a given email, by using the picon search service over at
1826 # http://www.cs.indiana.edu/picons/search.html
1827 sub picon_url {
1828         my $email = lc shift;
1829         if (!$avatar_cache{$email}) {
1830                 my ($user, $domain) = split('@', $email);
1831                 $avatar_cache{$email} =
1832                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1833                         "$domain/$user/" .
1834                         "users+domains+unknown/up/single";
1835         }
1836         return $avatar_cache{$email};
1837 }
1838
1839 # Compute the gravatar url for a given email, if it's not in the cache already.
1840 # Gravatar stores only the part of the URL before the size, since that's the
1841 # one computationally more expensive. This also allows reuse of the cache for
1842 # different sizes (for this particular engine).
1843 sub gravatar_url {
1844         my $email = lc shift;
1845         my $size = shift;
1846         $avatar_cache{$email} ||=
1847                 "http://www.gravatar.com/avatar/" .
1848                         Digest::MD5::md5_hex($email) . "?s=";
1849         return $avatar_cache{$email} . $size;
1850 }
1851
1852 # Insert an avatar for the given $email at the given $size if the feature
1853 # is enabled.
1854 sub git_get_avatar {
1855         my ($email, %opts) = @_;
1856         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1857         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1858         $opts{-size} ||= 'default';
1859         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1860         my $url = "";
1861         if ($git_avatar eq 'gravatar') {
1862                 $url = gravatar_url($email, $size);
1863         } elsif ($git_avatar eq 'picon') {
1864                 $url = picon_url($email);
1865         }
1866         # Other providers can be added by extending the if chain, defining $url
1867         # as needed. If no variant puts something in $url, we assume avatars
1868         # are completely disabled/unavailable.
1869         if ($url) {
1870                 return $pre_white .
1871                        "<img width=\"$size\" " .
1872                             "class=\"avatar\" " .
1873                             "src=\"$url\" " .
1874                             "alt=\"\" " .
1875                        "/>" . $post_white;
1876         } else {
1877                 return "";
1878         }
1879 }
1880
1881 sub format_search_author {
1882         my ($author, $searchtype, $displaytext) = @_;
1883         my $have_search = gitweb_check_feature('search');
1884
1885         if ($have_search) {
1886                 my $performed = "";
1887                 if ($searchtype eq 'author') {
1888                         $performed = "authored";
1889                 } elsif ($searchtype eq 'committer') {
1890                         $performed = "committed";
1891                 }
1892
1893                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1894                                 searchtext=>$author,
1895                                 searchtype=>$searchtype), class=>"list",
1896                                 title=>"Search for commits $performed by $author"},
1897                                 $displaytext);
1898
1899         } else {
1900                 return $displaytext;
1901         }
1902 }
1903
1904 # format the author name of the given commit with the given tag
1905 # the author name is chopped and escaped according to the other
1906 # optional parameters (see chop_str).
1907 sub format_author_html {
1908         my $tag = shift;
1909         my $co = shift;
1910         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1911         return "<$tag class=\"author\">" .
1912                format_search_author($co->{'author_name'}, "author",
1913                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1914                        $author) .
1915                "</$tag>";
1916 }
1917
1918 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1919 sub format_git_diff_header_line {
1920         my $line = shift;
1921         my $diffinfo = shift;
1922         my ($from, $to) = @_;
1923
1924         if ($diffinfo->{'nparents'}) {
1925                 # combined diff
1926                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1927                 if ($to->{'href'}) {
1928                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1929                                          esc_path($to->{'file'}));
1930                 } else { # file was deleted (no href)
1931                         $line .= esc_path($to->{'file'});
1932                 }
1933         } else {
1934                 # "ordinary" diff
1935                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1936                 if ($from->{'href'}) {
1937                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1938                                          'a/' . esc_path($from->{'file'}));
1939                 } else { # file was added (no href)
1940                         $line .= 'a/' . esc_path($from->{'file'});
1941                 }
1942                 $line .= ' ';
1943                 if ($to->{'href'}) {
1944                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1945                                          'b/' . esc_path($to->{'file'}));
1946                 } else { # file was deleted
1947                         $line .= 'b/' . esc_path($to->{'file'});
1948                 }
1949         }
1950
1951         return "<div class=\"diff header\">$line</div>\n";
1952 }
1953
1954 # format extended diff header line, before patch itself
1955 sub format_extended_diff_header_line {
1956         my $line = shift;
1957         my $diffinfo = shift;
1958         my ($from, $to) = @_;
1959
1960         # match <path>
1961         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1962                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1963                                        esc_path($from->{'file'}));
1964         }
1965         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1966                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1967                                  esc_path($to->{'file'}));
1968         }
1969         # match single <mode>
1970         if ($line =~ m/\s(\d{6})$/) {
1971                 $line .= '<span class="info"> (' .
1972                          file_type_long($1) .
1973                          ')</span>';
1974         }
1975         # match <hash>
1976         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1977                 # can match only for combined diff
1978                 $line = 'index ';
1979                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1980                         if ($from->{'href'}[$i]) {
1981                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1982                                                   -class=>"hash"},
1983                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1984                         } else {
1985                                 $line .= '0' x 7;
1986                         }
1987                         # separator
1988                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1989                 }
1990                 $line .= '..';
1991                 if ($to->{'href'}) {
1992                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1993                                          substr($diffinfo->{'to_id'},0,7));
1994                 } else {
1995                         $line .= '0' x 7;
1996                 }
1997
1998         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1999                 # can match only for ordinary diff
2000                 my ($from_link, $to_link);
2001                 if ($from->{'href'}) {
2002                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2003                                              substr($diffinfo->{'from_id'},0,7));
2004                 } else {
2005                         $from_link = '0' x 7;
2006                 }
2007                 if ($to->{'href'}) {
2008                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2009                                            substr($diffinfo->{'to_id'},0,7));
2010                 } else {
2011                         $to_link = '0' x 7;
2012                 }
2013                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2014                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2015         }
2016
2017         return $line . "<br/>\n";
2018 }
2019
2020 # format from-file/to-file diff header
2021 sub format_diff_from_to_header {
2022         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2023         my $line;
2024         my $result = '';
2025
2026         $line = $from_line;
2027         #assert($line =~ m/^---/) if DEBUG;
2028         # no extra formatting for "^--- /dev/null"
2029         if (! $diffinfo->{'nparents'}) {
2030                 # ordinary (single parent) diff
2031                 if ($line =~ m!^--- "?a/!) {
2032                         if ($from->{'href'}) {
2033                                 $line = '--- a/' .
2034                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2035                                                 esc_path($from->{'file'}));
2036                         } else {
2037                                 $line = '--- a/' .
2038                                         esc_path($from->{'file'});
2039                         }
2040                 }
2041                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2042
2043         } else {
2044                 # combined diff (merge commit)
2045                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2046                         if ($from->{'href'}[$i]) {
2047                                 $line = '--- ' .
2048                                         $cgi->a({-href=>href(action=>"blobdiff",
2049                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2050                                                              hash_parent_base=>$parents[$i],
2051                                                              file_parent=>$from->{'file'}[$i],
2052                                                              hash=>$diffinfo->{'to_id'},
2053                                                              hash_base=>$hash,
2054                                                              file_name=>$to->{'file'}),
2055                                                  -class=>"path",
2056                                                  -title=>"diff" . ($i+1)},
2057                                                 $i+1) .
2058                                         '/' .
2059                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2060                                                 esc_path($from->{'file'}[$i]));
2061                         } else {
2062                                 $line = '--- /dev/null';
2063                         }
2064                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2065                 }
2066         }
2067
2068         $line = $to_line;
2069         #assert($line =~ m/^\+\+\+/) if DEBUG;
2070         # no extra formatting for "^+++ /dev/null"
2071         if ($line =~ m!^\+\+\+ "?b/!) {
2072                 if ($to->{'href'}) {
2073                         $line = '+++ b/' .
2074                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2075                                         esc_path($to->{'file'}));
2076                 } else {
2077                         $line = '+++ b/' .
2078                                 esc_path($to->{'file'});
2079                 }
2080         }
2081         $result .= qq!<div class="diff to_file">$line</div>\n!;
2082
2083         return $result;
2084 }
2085
2086 # create note for patch simplified by combined diff
2087 sub format_diff_cc_simplified {
2088         my ($diffinfo, @parents) = @_;
2089         my $result = '';
2090
2091         $result .= "<div class=\"diff header\">" .
2092                    "diff --cc ";
2093         if (!is_deleted($diffinfo)) {
2094                 $result .= $cgi->a({-href => href(action=>"blob",
2095                                                   hash_base=>$hash,
2096                                                   hash=>$diffinfo->{'to_id'},
2097                                                   file_name=>$diffinfo->{'to_file'}),
2098                                     -class => "path"},
2099                                    esc_path($diffinfo->{'to_file'}));
2100         } else {
2101                 $result .= esc_path($diffinfo->{'to_file'});
2102         }
2103         $result .= "</div>\n" . # class="diff header"
2104                    "<div class=\"diff nodifferences\">" .
2105                    "Simple merge" .
2106                    "</div>\n"; # class="diff nodifferences"
2107
2108         return $result;
2109 }
2110
2111 # format patch (diff) line (not to be used for diff headers)
2112 sub format_diff_line {
2113         my $line = shift;
2114         my ($from, $to) = @_;
2115         my $diff_class = "";
2116
2117         chomp $line;
2118
2119         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2120                 # combined diff
2121                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2122                 if ($line =~ m/^\@{3}/) {
2123                         $diff_class = " chunk_header";
2124                 } elsif ($line =~ m/^\\/) {
2125                         $diff_class = " incomplete";
2126                 } elsif ($prefix =~ tr/+/+/) {
2127                         $diff_class = " add";
2128                 } elsif ($prefix =~ tr/-/-/) {
2129                         $diff_class = " rem";
2130                 }
2131         } else {
2132                 # assume ordinary diff
2133                 my $char = substr($line, 0, 1);
2134                 if ($char eq '+') {
2135                         $diff_class = " add";
2136                 } elsif ($char eq '-') {
2137                         $diff_class = " rem";
2138                 } elsif ($char eq '@') {
2139                         $diff_class = " chunk_header";
2140                 } elsif ($char eq "\\") {
2141                         $diff_class = " incomplete";
2142                 }
2143         }
2144         $line = untabify($line);
2145         if ($from && $to && $line =~ m/^\@{2} /) {
2146                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2147                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2148
2149                 $from_lines = 0 unless defined $from_lines;
2150                 $to_lines   = 0 unless defined $to_lines;
2151
2152                 if ($from->{'href'}) {
2153                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2154                                              -class=>"list"}, $from_text);
2155                 }
2156                 if ($to->{'href'}) {
2157                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2158                                              -class=>"list"}, $to_text);
2159                 }
2160                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2161                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2162                 return "<div class=\"diff$diff_class\">$line</div>\n";
2163         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2164                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2165                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2166
2167                 @from_text = split(' ', $ranges);
2168                 for (my $i = 0; $i < @from_text; ++$i) {
2169                         ($from_start[$i], $from_nlines[$i]) =
2170                                 (split(',', substr($from_text[$i], 1)), 0);
2171                 }
2172
2173                 $to_text   = pop @from_text;
2174                 $to_start  = pop @from_start;
2175                 $to_nlines = pop @from_nlines;
2176
2177                 $line = "<span class=\"chunk_info\">$prefix ";
2178                 for (my $i = 0; $i < @from_text; ++$i) {
2179                         if ($from->{'href'}[$i]) {
2180                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2181                                                   -class=>"list"}, $from_text[$i]);
2182                         } else {
2183                                 $line .= $from_text[$i];
2184                         }
2185                         $line .= " ";
2186                 }
2187                 if ($to->{'href'}) {
2188                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2189                                           -class=>"list"}, $to_text);
2190                 } else {
2191                         $line .= $to_text;
2192                 }
2193                 $line .= " $prefix</span>" .
2194                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2195                 return "<div class=\"diff$diff_class\">$line</div>\n";
2196         }
2197         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2198 }
2199
2200 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2201 # linked.  Pass the hash of the tree/commit to snapshot.
2202 sub format_snapshot_links {
2203         my ($hash) = @_;
2204         my $num_fmts = @snapshot_fmts;
2205         if ($num_fmts > 1) {
2206                 # A parenthesized list of links bearing format names.
2207                 # e.g. "snapshot (_tar.gz_ _zip_)"
2208                 return "snapshot (" . join(' ', map
2209                         $cgi->a({
2210                                 -href => href(
2211                                         action=>"snapshot",
2212                                         hash=>$hash,
2213                                         snapshot_format=>$_
2214                                 )
2215                         }, $known_snapshot_formats{$_}{'display'})
2216                 , @snapshot_fmts) . ")";
2217         } elsif ($num_fmts == 1) {
2218                 # A single "snapshot" link whose tooltip bears the format name.
2219                 # i.e. "_snapshot_"
2220                 my ($fmt) = @snapshot_fmts;
2221                 return
2222                         $cgi->a({
2223                                 -href => href(
2224                                         action=>"snapshot",
2225                                         hash=>$hash,
2226                                         snapshot_format=>$fmt
2227                                 ),
2228                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2229                         }, "snapshot");
2230         } else { # $num_fmts == 0
2231                 return undef;
2232         }
2233 }
2234
2235 ## ......................................................................
2236 ## functions returning values to be passed, perhaps after some
2237 ## transformation, to other functions; e.g. returning arguments to href()
2238
2239 # returns hash to be passed to href to generate gitweb URL
2240 # in -title key it returns description of link
2241 sub get_feed_info {
2242         my $format = shift || 'Atom';
2243         my %res = (action => lc($format));
2244
2245         # feed links are possible only for project views
2246         return unless (defined $project);
2247         # some views should link to OPML, or to generic project feed,
2248         # or don't have specific feed yet (so they should use generic)
2249         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2250
2251         my $branch;
2252         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2253         # from tag links; this also makes possible to detect branch links
2254         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2255             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2256                 $branch = $1;
2257         }
2258         # find log type for feed description (title)
2259         my $type = 'log';
2260         if (defined $file_name) {
2261                 $type  = "history of $file_name";
2262                 $type .= "/" if ($action eq 'tree');
2263                 $type .= " on '$branch'" if (defined $branch);
2264         } else {
2265                 $type = "log of $branch" if (defined $branch);
2266         }
2267
2268         $res{-title} = $type;
2269         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2270         $res{'file_name'} = $file_name;
2271
2272         return %res;
2273 }
2274
2275 ## ----------------------------------------------------------------------
2276 ## git utility subroutines, invoking git commands
2277
2278 # returns path to the core git executable and the --git-dir parameter as list
2279 sub git_cmd {
2280         $number_of_git_cmds++;
2281         return $GIT, '--git-dir='.$git_dir;
2282 }
2283
2284 # quote the given arguments for passing them to the shell
2285 # quote_command("command", "arg 1", "arg with ' and ! characters")
2286 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2287 # Try to avoid using this function wherever possible.
2288 sub quote_command {
2289         return join(' ',
2290                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2291 }
2292
2293 # get HEAD ref of given project as hash
2294 sub git_get_head_hash {
2295         return git_get_full_hash(shift, 'HEAD');
2296 }
2297
2298 sub git_get_full_hash {
2299         return git_get_hash(@_);
2300 }
2301
2302 sub git_get_short_hash {
2303         return git_get_hash(@_, '--short=7');
2304 }
2305
2306 sub git_get_hash {
2307         my ($project, $hash, @options) = @_;
2308         my $o_git_dir = $git_dir;
2309         my $retval = undef;
2310         $git_dir = "$projectroot/$project";
2311         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2312             '--verify', '-q', @options, $hash) {
2313                 $retval = <$fd>;
2314                 chomp $retval if defined $retval;
2315                 close $fd;
2316         }
2317         if (defined $o_git_dir) {
2318                 $git_dir = $o_git_dir;
2319         }
2320         return $retval;
2321 }
2322
2323 # get type of given object
2324 sub git_get_type {
2325         my $hash = shift;
2326
2327         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2328         my $type = <$fd>;
2329         close $fd or return;
2330         chomp $type;
2331         return $type;
2332 }
2333
2334 # repository configuration
2335 our $config_file = '';
2336 our %config;
2337
2338 # store multiple values for single key as anonymous array reference
2339 # single values stored directly in the hash, not as [ <value> ]
2340 sub hash_set_multi {
2341         my ($hash, $key, $value) = @_;
2342
2343         if (!exists $hash->{$key}) {
2344                 $hash->{$key} = $value;
2345         } elsif (!ref $hash->{$key}) {
2346                 $hash->{$key} = [ $hash->{$key}, $value ];
2347         } else {
2348                 push @{$hash->{$key}}, $value;
2349         }
2350 }
2351
2352 # return hash of git project configuration
2353 # optionally limited to some section, e.g. 'gitweb'
2354 sub git_parse_project_config {
2355         my $section_regexp = shift;
2356         my %config;
2357
2358         local $/ = "\0";
2359
2360         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2361                 or return;
2362
2363         while (my $keyval = <$fh>) {
2364                 chomp $keyval;
2365                 my ($key, $value) = split(/\n/, $keyval, 2);
2366
2367                 hash_set_multi(\%config, $key, $value)
2368                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2369         }
2370         close $fh;
2371
2372         return %config;
2373 }
2374
2375 # convert config value to boolean: 'true' or 'false'
2376 # no value, number > 0, 'true' and 'yes' values are true
2377 # rest of values are treated as false (never as error)
2378 sub config_to_bool {
2379         my $val = shift;
2380
2381         return 1 if !defined $val;             # section.key
2382
2383         # strip leading and trailing whitespace
2384         $val =~ s/^\s+//;
2385         $val =~ s/\s+$//;
2386
2387         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2388                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2389 }
2390
2391 # convert config value to simple decimal number
2392 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2393 # to be multiplied by 1024, 1048576, or 1073741824
2394 sub config_to_int {
2395         my $val = shift;
2396
2397         # strip leading and trailing whitespace
2398         $val =~ s/^\s+//;
2399         $val =~ s/\s+$//;
2400
2401         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2402                 $unit = lc($unit);
2403                 # unknown unit is treated as 1
2404                 return $num * ($unit eq 'g' ? 1073741824 :
2405                                $unit eq 'm' ?    1048576 :
2406                                $unit eq 'k' ?       1024 : 1);
2407         }
2408         return $val;
2409 }
2410
2411 # convert config value to array reference, if needed
2412 sub config_to_multi {
2413         my $val = shift;
2414
2415         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2416 }
2417
2418 sub git_get_project_config {
2419         my ($key, $type) = @_;
2420
2421         return unless defined $git_dir;
2422
2423         # key sanity check
2424         return unless ($key);
2425         $key =~ s/^gitweb\.//;
2426         return if ($key =~ m/\W/);
2427
2428         # type sanity check
2429         if (defined $type) {
2430                 $type =~ s/^--//;
2431                 $type = undef
2432                         unless ($type eq 'bool' || $type eq 'int');
2433         }
2434
2435         # get config
2436         if (!defined $config_file ||
2437             $config_file ne "$git_dir/config") {
2438                 %config = git_parse_project_config('gitweb');
2439                 $config_file = "$git_dir/config";
2440         }
2441
2442         # check if config variable (key) exists
2443         return unless exists $config{"gitweb.$key"};
2444
2445         # ensure given type
2446         if (!defined $type) {
2447                 return $config{"gitweb.$key"};
2448         } elsif ($type eq 'bool') {
2449                 # backward compatibility: 'git config --bool' returns true/false
2450                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2451         } elsif ($type eq 'int') {
2452                 return config_to_int($config{"gitweb.$key"});
2453         }
2454         return $config{"gitweb.$key"};
2455 }
2456
2457 # get hash of given path at given ref
2458 sub git_get_hash_by_path {
2459         my $base = shift;
2460         my $path = shift || return undef;
2461         my $type = shift;
2462
2463         $path =~ s,/+$,,;
2464
2465         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2466                 or die_error(500, "Open git-ls-tree failed");
2467         my $line = <$fd>;
2468         close $fd or return undef;
2469
2470         if (!defined $line) {
2471                 # there is no tree or hash given by $path at $base
2472                 return undef;
2473         }
2474
2475         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2476         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2477         if (defined $type && $type ne $2) {
2478                 # type doesn't match
2479                 return undef;
2480         }
2481         return $3;
2482 }
2483
2484 # get path of entry with given hash at given tree-ish (ref)
2485 # used to get 'from' filename for combined diff (merge commit) for renames
2486 sub git_get_path_by_hash {
2487         my $base = shift || return;
2488         my $hash = shift || return;
2489
2490         local $/ = "\0";
2491
2492         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2493                 or return undef;
2494         while (my $line = <$fd>) {
2495                 chomp $line;
2496
2497                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2498                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2499                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2500                         close $fd;
2501                         return $1;
2502                 }
2503         }
2504         close $fd;
2505         return undef;
2506 }
2507
2508 ## ......................................................................
2509 ## git utility functions, directly accessing git repository
2510
2511 sub git_get_project_description {
2512         my $path = shift;
2513
2514         $git_dir = "$projectroot/$path";
2515         open my $fd, '<', "$git_dir/description"
2516                 or return git_get_project_config('description');
2517         my $descr = <$fd>;
2518         close $fd;
2519         if (defined $descr) {
2520                 chomp $descr;
2521         }
2522         return $descr;
2523 }
2524
2525 sub git_get_project_ctags {
2526         my $path = shift;
2527         my $ctags = {};
2528
2529         $git_dir = "$projectroot/$path";
2530         opendir my $dh, "$git_dir/ctags"
2531                 or return $ctags;
2532         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2533                 open my $ct, '<', $_ or next;
2534                 my $val = <$ct>;
2535                 chomp $val;
2536                 close $ct;
2537                 my $ctag = $_; $ctag =~ s#.*/##;
2538                 $ctags->{$ctag} = $val;
2539         }
2540         closedir $dh;
2541         $ctags;
2542 }
2543
2544 sub git_populate_project_tagcloud {
2545         my $ctags = shift;
2546
2547         # First, merge different-cased tags; tags vote on casing
2548         my %ctags_lc;
2549         foreach (keys %$ctags) {
2550                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2551                 if (not $ctags_lc{lc $_}->{topcount}
2552                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2553                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2554                         $ctags_lc{lc $_}->{topname} = $_;
2555                 }
2556         }
2557
2558         my $cloud;
2559         if (eval { require HTML::TagCloud; 1; }) {
2560                 $cloud = HTML::TagCloud->new;
2561                 foreach (sort keys %ctags_lc) {
2562                         # Pad the title with spaces so that the cloud looks
2563                         # less crammed.
2564                         my $title = $ctags_lc{$_}->{topname};
2565                         $title =~ s/ /&nbsp;/g;
2566                         $title =~ s/^/&nbsp;/g;
2567                         $title =~ s/$/&nbsp;/g;
2568                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2569                 }
2570         } else {
2571                 $cloud = \%ctags_lc;
2572         }
2573         $cloud;
2574 }
2575
2576 sub git_show_project_tagcloud {
2577         my ($cloud, $count) = @_;
2578         print STDERR ref($cloud)."..\n";
2579         if (ref $cloud eq 'HTML::TagCloud') {
2580                 return $cloud->html_and_css($count);
2581         } else {
2582                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2583                 return '<p align="center">' . join (', ', map {
2584                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2585                 } splice(@tags, 0, $count)) . '</p>';
2586         }
2587 }
2588
2589 sub git_get_project_url_list {
2590         my $path = shift;
2591
2592         $git_dir = "$projectroot/$path";
2593         open my $fd, '<', "$git_dir/cloneurl"
2594                 or return wantarray ?
2595                 @{ config_to_multi(git_get_project_config('url')) } :
2596                    config_to_multi(git_get_project_config('url'));
2597         my @git_project_url_list = map { chomp; $_ } <$fd>;
2598         close $fd;
2599
2600         return wantarray ? @git_project_url_list : \@git_project_url_list;
2601 }
2602
2603 sub git_get_projects_list {
2604         my ($filter) = @_;
2605         my @list;
2606
2607         $filter ||= '';
2608         $filter =~ s/\.git$//;
2609
2610         my $check_forks = gitweb_check_feature('forks');
2611
2612         if (-d $projects_list) {
2613                 # search in directory
2614                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2615                 # remove the trailing "/"
2616                 $dir =~ s!/+$!!;
2617                 my $pfxlen = length("$dir");
2618                 my $pfxdepth = ($dir =~ tr!/!!);
2619
2620                 File::Find::find({
2621                         follow_fast => 1, # follow symbolic links
2622                         follow_skip => 2, # ignore duplicates
2623                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2624                         wanted => sub {
2625                                 # global variables
2626                                 our $project_maxdepth;
2627                                 our $projectroot;
2628                                 # skip project-list toplevel, if we get it.
2629                                 return if (m!^[/.]$!);
2630                                 # only directories can be git repositories
2631                                 return unless (-d $_);
2632                                 # don't traverse too deep (Find is super slow on os x)
2633                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2634                                         $File::Find::prune = 1;
2635                                         return;
2636                                 }
2637
2638                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2639                                 # we check related file in $projectroot
2640                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2641                                 if (check_export_ok("$projectroot/$path")) {
2642                                         push @list, { path => $path };
2643                                         $File::Find::prune = 1;
2644                                 }
2645                         },
2646                 }, "$dir");
2647
2648         } elsif (-f $projects_list) {
2649                 # read from file(url-encoded):
2650                 # 'git%2Fgit.git Linus+Torvalds'
2651                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2652                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2653                 my %paths;
2654                 open my $fd, '<', $projects_list or return;
2655         PROJECT:
2656                 while (my $line = <$fd>) {
2657                         chomp $line;
2658                         my ($path, $owner) = split ' ', $line;
2659                         $path = unescape($path);
2660                         $owner = unescape($owner);
2661                         if (!defined $path) {
2662                                 next;
2663                         }
2664                         if ($filter ne '') {
2665                                 # looking for forks;
2666                                 my $pfx = substr($path, 0, length($filter));
2667                                 if ($pfx ne $filter) {
2668                                         next PROJECT;
2669                                 }
2670                                 my $sfx = substr($path, length($filter));
2671                                 if ($sfx !~ /^\/.*\.git$/) {
2672                                         next PROJECT;
2673                                 }
2674                         } elsif ($check_forks) {
2675                         PATH:
2676                                 foreach my $filter (keys %paths) {
2677                                         # looking for forks;
2678                                         my $pfx = substr($path, 0, length($filter));
2679                                         if ($pfx ne $filter) {
2680                                                 next PATH;
2681                                         }
2682                                         my $sfx = substr($path, length($filter));
2683                                         if ($sfx !~ /^\/.*\.git$/) {
2684                                                 next PATH;
2685                                         }
2686                                         # is a fork, don't include it in
2687                                         # the list
2688                                         next PROJECT;
2689                                 }
2690                         }
2691                         if (check_export_ok("$projectroot/$path")) {
2692                                 my $pr = {
2693                                         path => $path,
2694                                         owner => to_utf8($owner),
2695                                 };
2696                                 push @list, $pr;
2697                                 (my $forks_path = $path) =~ s/\.git$//;
2698                                 $paths{$forks_path}++;
2699                         }
2700                 }
2701                 close $fd;
2702         }
2703         return @list;
2704 }
2705
2706 our $gitweb_project_owner = undef;
2707 sub git_get_project_list_from_file {
2708
2709         return if (defined $gitweb_project_owner);
2710
2711         $gitweb_project_owner = {};
2712         # read from file (url-encoded):
2713         # 'git%2Fgit.git Linus+Torvalds'
2714         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2715         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2716         if (-f $projects_list) {
2717                 open(my $fd, '<', $projects_list);
2718                 while (my $line = <$fd>) {
2719                         chomp $line;
2720                         my ($pr, $ow) = split ' ', $line;
2721                         $pr = unescape($pr);
2722                         $ow = unescape($ow);
2723                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2724                 }
2725                 close $fd;
2726         }
2727 }
2728
2729 sub git_get_project_owner {
2730         my $project = shift;
2731         my $owner;
2732
2733         return undef unless $project;
2734         $git_dir = "$projectroot/$project";
2735
2736         if (!defined $gitweb_project_owner) {
2737                 git_get_project_list_from_file();
2738         }
2739
2740         if (exists $gitweb_project_owner->{$project}) {
2741                 $owner = $gitweb_project_owner->{$project};
2742         }
2743         if (!defined $owner){
2744                 $owner = git_get_project_config('owner');
2745         }
2746         if (!defined $owner) {
2747                 $owner = get_file_owner("$git_dir");
2748         }
2749
2750         return $owner;
2751 }
2752
2753 sub git_get_last_activity {
2754         my ($path) = @_;
2755         my $fd;
2756
2757         $git_dir = "$projectroot/$path";
2758         open($fd, "-|", git_cmd(), 'for-each-ref',
2759              '--format=%(committer)',
2760              '--sort=-committerdate',
2761              '--count=1',
2762              'refs/heads') or return;
2763         my $most_recent = <$fd>;
2764         close $fd or return;
2765         if (defined $most_recent &&
2766             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2767                 my $timestamp = $1;
2768                 my $age = time - $timestamp;
2769                 return ($age, age_string($age));
2770         }
2771         return (undef, undef);
2772 }
2773
2774 sub git_get_references {
2775         my $type = shift || "";
2776         my %refs;
2777         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2778         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2779         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2780                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2781                 or return;
2782
2783         while (my $line = <$fd>) {
2784                 chomp $line;
2785                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2786                         if (defined $refs{$1}) {
2787                                 push @{$refs{$1}}, $2;
2788                         } else {
2789                                 $refs{$1} = [ $2 ];
2790                         }
2791                 }
2792         }
2793         close $fd or return;
2794         return \%refs;
2795 }
2796
2797 sub git_get_rev_name_tags {
2798         my $hash = shift || return undef;
2799
2800         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2801                 or return;
2802         my $name_rev = <$fd>;
2803         close $fd;
2804
2805         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2806                 return $1;
2807         } else {
2808                 # catches also '$hash undefined' output
2809                 return undef;
2810         }
2811 }
2812
2813 ## ----------------------------------------------------------------------
2814 ## parse to hash functions
2815
2816 sub parse_date {
2817         my $epoch = shift;
2818         my $tz = shift || "-0000";
2819
2820         my %date;
2821         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2822         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2823         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2824         $date{'hour'} = $hour;
2825         $date{'minute'} = $min;
2826         $date{'mday'} = $mday;
2827         $date{'day'} = $days[$wday];
2828         $date{'month'} = $months[$mon];
2829         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2830                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2831         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2832                              $mday, $months[$mon], $hour ,$min;
2833         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2834                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2835
2836         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2837         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2838         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2839         $date{'hour_local'} = $hour;
2840         $date{'minute_local'} = $min;
2841         $date{'tz_local'} = $tz;
2842         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2843                                   1900+$year, $mon+1, $mday,
2844                                   $hour, $min, $sec, $tz);
2845         return %date;
2846 }
2847
2848 sub parse_tag {
2849         my $tag_id = shift;
2850         my %tag;
2851         my @comment;
2852
2853         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2854         $tag{'id'} = $tag_id;
2855         while (my $line = <$fd>) {
2856                 chomp $line;
2857                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2858                         $tag{'object'} = $1;
2859                 } elsif ($line =~ m/^type (.+)$/) {
2860                         $tag{'type'} = $1;
2861                 } elsif ($line =~ m/^tag (.+)$/) {
2862                         $tag{'name'} = $1;
2863                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2864                         $tag{'author'} = $1;
2865                         $tag{'author_epoch'} = $2;
2866                         $tag{'author_tz'} = $3;
2867                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2868                                 $tag{'author_name'}  = $1;
2869                                 $tag{'author_email'} = $2;
2870                         } else {
2871                                 $tag{'author_name'} = $tag{'author'};
2872                         }
2873                 } elsif ($line =~ m/--BEGIN/) {
2874                         push @comment, $line;
2875                         last;
2876                 } elsif ($line eq "") {
2877                         last;
2878                 }
2879         }
2880         push @comment, <$fd>;
2881         $tag{'comment'} = \@comment;
2882         close $fd or return;
2883         if (!defined $tag{'name'}) {
2884                 return
2885         };
2886         return %tag
2887 }
2888
2889 sub parse_commit_text {
2890         my ($commit_text, $withparents) = @_;
2891         my @commit_lines = split '\n', $commit_text;
2892         my %co;
2893
2894         pop @commit_lines; # Remove '\0'
2895
2896         if (! @commit_lines) {
2897                 return;
2898         }
2899
2900         my $header = shift @commit_lines;
2901         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2902                 return;
2903         }
2904         ($co{'id'}, my @parents) = split ' ', $header;
2905         while (my $line = shift @commit_lines) {
2906                 last if $line eq "\n";
2907                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2908                         $co{'tree'} = $1;
2909                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2910                         push @parents, $1;
2911                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2912                         $co{'author'} = to_utf8($1);
2913                         $co{'author_epoch'} = $2;
2914                         $co{'author_tz'} = $3;
2915                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2916                                 $co{'author_name'}  = $1;
2917                                 $co{'author_email'} = $2;
2918                         } else {
2919                                 $co{'author_name'} = $co{'author'};
2920                         }
2921                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2922                         $co{'committer'} = to_utf8($1);
2923                         $co{'committer_epoch'} = $2;
2924                         $co{'committer_tz'} = $3;
2925                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2926                                 $co{'committer_name'}  = $1;
2927                                 $co{'committer_email'} = $2;
2928                         } else {
2929                                 $co{'committer_name'} = $co{'committer'};
2930                         }
2931                 }
2932         }
2933         if (!defined $co{'tree'}) {
2934                 return;
2935         };
2936         $co{'parents'} = \@parents;
2937         $co{'parent'} = $parents[0];
2938
2939         foreach my $title (@commit_lines) {
2940                 $title =~ s/^    //;
2941                 if ($title ne "") {
2942                         $co{'title'} = chop_str($title, 80, 5);
2943                         # remove leading stuff of merges to make the interesting part visible
2944                         if (length($title) > 50) {
2945                                 $title =~ s/^Automatic //;
2946                                 $title =~ s/^merge (of|with) /Merge ... /i;
2947                                 if (length($title) > 50) {
2948                                         $title =~ s/(http|rsync):\/\///;
2949                                 }
2950                                 if (length($title) > 50) {
2951                                         $title =~ s/(master|www|rsync)\.//;
2952                                 }
2953                                 if (length($title) > 50) {
2954                                         $title =~ s/kernel.org:?//;
2955                                 }
2956                                 if (length($title) > 50) {
2957                                         $title =~ s/\/pub\/scm//;
2958                                 }
2959                         }
2960                         $co{'title_short'} = chop_str($title, 50, 5);
2961                         last;
2962                 }
2963         }
2964         if (! defined $co{'title'} || $co{'title'} eq "") {
2965                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2966         }
2967         # remove added spaces
2968         foreach my $line (@commit_lines) {
2969                 $line =~ s/^    //;
2970         }
2971         $co{'comment'} = \@commit_lines;
2972
2973         my $age = time - $co{'committer_epoch'};
2974         $co{'age'} = $age;
2975         $co{'age_string'} = age_string($age);
2976         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2977         if ($age > 60*60*24*7*2) {
2978                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2979                 $co{'age_string_age'} = $co{'age_string'};
2980         } else {
2981                 $co{'age_string_date'} = $co{'age_string'};
2982                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2983         }
2984         return %co;
2985 }
2986
2987 sub parse_commit {
2988         my ($commit_id) = @_;
2989         my %co;
2990
2991         local $/ = "\0";
2992
2993         open my $fd, "-|", git_cmd(), "rev-list",
2994                 "--parents",
2995                 "--header",
2996                 "--max-count=1",
2997                 $commit_id,
2998                 "--",
2999                 or die_error(500, "Open git-rev-list failed");
3000         %co = parse_commit_text(<$fd>, 1);
3001         close $fd;
3002
3003         return %co;
3004 }
3005
3006 sub parse_commits {
3007         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3008         my @cos;
3009
3010         $maxcount ||= 1;
3011         $skip ||= 0;
3012
3013         local $/ = "\0";
3014
3015         open my $fd, "-|", git_cmd(), "rev-list",
3016                 "--header",
3017                 @args,
3018                 ("--max-count=" . $maxcount),
3019                 ("--skip=" . $skip),
3020                 @extra_options,
3021                 $commit_id,
3022                 "--",
3023                 ($filename ? ($filename) : ())
3024                 or die_error(500, "Open git-rev-list failed");
3025         while (my $line = <$fd>) {
3026                 my %co = parse_commit_text($line);
3027                 push @cos, \%co;
3028         }
3029         close $fd;
3030
3031         return wantarray ? @cos : \@cos;
3032 }
3033
3034 # parse line of git-diff-tree "raw" output
3035 sub parse_difftree_raw_line {
3036         my $line = shift;
3037         my %res;
3038
3039         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3040         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3041         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3042                 $res{'from_mode'} = $1;
3043                 $res{'to_mode'} = $2;
3044                 $res{'from_id'} = $3;
3045                 $res{'to_id'} = $4;
3046                 $res{'status'} = $5;
3047                 $res{'similarity'} = $6;
3048                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3049                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3050                 } else {
3051                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3052                 }
3053         }
3054         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3055         # combined diff (for merge commit)
3056         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3057                 $res{'nparents'}  = length($1);
3058                 $res{'from_mode'} = [ split(' ', $2) ];
3059                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3060                 $res{'from_id'} = [ split(' ', $3) ];
3061                 $res{'to_id'} = pop @{$res{'from_id'}};
3062                 $res{'status'} = [ split('', $4) ];
3063                 $res{'to_file'} = unquote($5);
3064         }
3065         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3066         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3067                 $res{'commit'} = $1;
3068         }
3069
3070         return wantarray ? %res : \%res;
3071 }
3072
3073 # wrapper: return parsed line of git-diff-tree "raw" output
3074 # (the argument might be raw line, or parsed info)
3075 sub parsed_difftree_line {
3076         my $line_or_ref = shift;
3077
3078         if (ref($line_or_ref) eq "HASH") {
3079                 # pre-parsed (or generated by hand)
3080                 return $line_or_ref;
3081         } else {
3082                 return parse_difftree_raw_line($line_or_ref);
3083         }
3084 }
3085
3086 # parse line of git-ls-tree output
3087 sub parse_ls_tree_line {
3088         my $line = shift;
3089         my %opts = @_;
3090         my %res;
3091
3092         if ($opts{'-l'}) {
3093                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3094                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3095
3096                 $res{'mode'} = $1;
3097                 $res{'type'} = $2;
3098                 $res{'hash'} = $3;
3099                 $res{'size'} = $4;
3100                 if ($opts{'-z'}) {
3101                         $res{'name'} = $5;
3102                 } else {
3103                         $res{'name'} = unquote($5);
3104                 }
3105         } else {
3106                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3107                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3108
3109                 $res{'mode'} = $1;
3110                 $res{'type'} = $2;
3111                 $res{'hash'} = $3;
3112                 if ($opts{'-z'}) {
3113                         $res{'name'} = $4;
3114                 } else {
3115                         $res{'name'} = unquote($4);
3116                 }
3117         }
3118
3119         return wantarray ? %res : \%res;
3120 }
3121
3122 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3123 sub parse_from_to_diffinfo {
3124         my ($diffinfo, $from, $to, @parents) = @_;
3125
3126         if ($diffinfo->{'nparents'}) {
3127                 # combined diff
3128                 $from->{'file'} = [];
3129                 $from->{'href'} = [];
3130                 fill_from_file_info($diffinfo, @parents)
3131                         unless exists $diffinfo->{'from_file'};
3132                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3133                         $from->{'file'}[$i] =
3134                                 defined $diffinfo->{'from_file'}[$i] ?
3135                                         $diffinfo->{'from_file'}[$i] :
3136                                         $diffinfo->{'to_file'};
3137                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3138                                 $from->{'href'}[$i] = href(action=>"blob",
3139                                                            hash_base=>$parents[$i],
3140                                                            hash=>$diffinfo->{'from_id'}[$i],
3141                                                            file_name=>$from->{'file'}[$i]);
3142                         } else {
3143                                 $from->{'href'}[$i] = undef;
3144                         }
3145                 }
3146         } else {
3147                 # ordinary (not combined) diff
3148                 $from->{'file'} = $diffinfo->{'from_file'};
3149                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3150                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3151                                                hash=>$diffinfo->{'from_id'},
3152                                                file_name=>$from->{'file'});
3153                 } else {
3154                         delete $from->{'href'};
3155                 }
3156         }
3157
3158         $to->{'file'} = $diffinfo->{'to_file'};
3159         if (!is_deleted($diffinfo)) { # file exists in result
3160                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3161                                      hash=>$diffinfo->{'to_id'},
3162                                      file_name=>$to->{'file'});
3163         } else {
3164                 delete $to->{'href'};
3165         }
3166 }
3167
3168 ## ......................................................................
3169 ## parse to array of hashes functions
3170
3171 sub git_get_heads_list {
3172         my ($limit, @classes) = @_;
3173         @classes = ('heads') unless @classes;
3174         my @patterns = map { "refs/$_" } @classes;
3175         my @headslist;
3176
3177         open my $fd, '-|', git_cmd(), 'for-each-ref',
3178                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3179                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3180                 @patterns
3181                 or return;
3182         while (my $line = <$fd>) {
3183                 my %ref_item;
3184
3185                 chomp $line;
3186                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3187                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3188                 my ($committer, $epoch, $tz) =
3189                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3190                 $ref_item{'fullname'}  = $name;
3191                 $name =~ s!^refs/(?:head|remote)s/!!;
3192
3193                 $ref_item{'name'}  = $name;
3194                 $ref_item{'id'}    = $hash;
3195                 $ref_item{'title'} = $title || '(no commit message)';
3196                 $ref_item{'epoch'} = $epoch;
3197                 if ($epoch) {
3198                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3199                 } else {
3200                         $ref_item{'age'} = "unknown";
3201                 }
3202
3203                 push @headslist, \%ref_item;
3204         }
3205         close $fd;
3206
3207         return wantarray ? @headslist : \@headslist;
3208 }
3209
3210 sub git_get_tags_list {
3211         my $limit = shift;
3212         my @tagslist;
3213
3214         open my $fd, '-|', git_cmd(), 'for-each-ref',
3215                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3216                 '--format=%(objectname) %(objecttype) %(refname) '.
3217                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3218                 'refs/tags'
3219                 or return;
3220         while (my $line = <$fd>) {
3221                 my %ref_item;
3222
3223                 chomp $line;
3224                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3225                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3226                 my ($creator, $epoch, $tz) =
3227                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3228                 $ref_item{'fullname'} = $name;
3229                 $name =~ s!^refs/tags/!!;
3230
3231                 $ref_item{'type'} = $type;
3232                 $ref_item{'id'} = $id;
3233                 $ref_item{'name'} = $name;
3234                 if ($type eq "tag") {
3235                         $ref_item{'subject'} = $title;
3236                         $ref_item{'reftype'} = $reftype;
3237                         $ref_item{'refid'}   = $refid;
3238                 } else {
3239                         $ref_item{'reftype'} = $type;
3240                         $ref_item{'refid'}   = $id;
3241                 }
3242
3243                 if ($type eq "tag" || $type eq "commit") {
3244                         $ref_item{'epoch'} = $epoch;
3245                         if ($epoch) {
3246                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3247                         } else {
3248                                 $ref_item{'age'} = "unknown";
3249                         }
3250                 }
3251
3252                 push @tagslist, \%ref_item;
3253         }
3254         close $fd;
3255
3256         return wantarray ? @tagslist : \@tagslist;
3257 }
3258
3259 ## ----------------------------------------------------------------------
3260 ## filesystem-related functions
3261
3262 sub get_file_owner {
3263         my $path = shift;
3264
3265         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3266         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3267         if (!defined $gcos) {
3268                 return undef;
3269         }
3270         my $owner = $gcos;
3271         $owner =~ s/[,;].*$//;
3272         return to_utf8($owner);
3273 }
3274
3275 # assume that file exists
3276 sub insert_file {
3277         my $filename = shift;
3278
3279         open my $fd, '<', $filename;
3280         print map { to_utf8($_) } <$fd>;
3281         close $fd;
3282 }
3283
3284 ## ......................................................................
3285 ## mimetype related functions
3286
3287 sub mimetype_guess_file {
3288         my $filename = shift;
3289         my $mimemap = shift;
3290         -r $mimemap or return undef;
3291
3292         my %mimemap;
3293         open(my $mh, '<', $mimemap) or return undef;
3294         while (<$mh>) {
3295                 next if m/^#/; # skip comments
3296                 my ($mimetype, $exts) = split(/\t+/);
3297                 if (defined $exts) {
3298                         my @exts = split(/\s+/, $exts);
3299                         foreach my $ext (@exts) {
3300                                 $mimemap{$ext} = $mimetype;
3301                         }
3302                 }
3303         }
3304         close($mh);
3305
3306         $filename =~ /\.([^.]*)$/;
3307         return $mimemap{$1};
3308 }
3309
3310 sub mimetype_guess {
3311         my $filename = shift;
3312         my $mime;
3313         $filename =~ /\./ or return undef;
3314
3315         if ($mimetypes_file) {
3316                 my $file = $mimetypes_file;
3317                 if ($file !~ m!^/!) { # if it is relative path
3318                         # it is relative to project
3319                         $file = "$projectroot/$project/$file";
3320                 }
3321                 $mime = mimetype_guess_file($filename, $file);
3322         }
3323         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3324         return $mime;
3325 }
3326
3327 sub blob_mimetype {
3328         my $fd = shift;
3329         my $filename = shift;
3330
3331         if ($filename) {
3332                 my $mime = mimetype_guess($filename);
3333                 $mime and return $mime;
3334         }
3335
3336         # just in case
3337         return $default_blob_plain_mimetype unless $fd;
3338
3339         if (-T $fd) {
3340                 return 'text/plain';
3341         } elsif (! $filename) {
3342                 return 'application/octet-stream';
3343         } elsif ($filename =~ m/\.png$/i) {
3344                 return 'image/png';
3345         } elsif ($filename =~ m/\.gif$/i) {
3346                 return 'image/gif';
3347         } elsif ($filename =~ m/\.jpe?g$/i) {
3348                 return 'image/jpeg';
3349         } else {
3350                 return 'application/octet-stream';
3351         }
3352 }
3353
3354 sub blob_contenttype {
3355         my ($fd, $file_name, $type) = @_;
3356
3357         $type ||= blob_mimetype($fd, $file_name);
3358         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3359                 $type .= "; charset=$default_text_plain_charset";
3360         }
3361
3362         return $type;
3363 }
3364
3365 # guess file syntax for syntax highlighting; return undef if no highlighting
3366 # the name of syntax can (in the future) depend on syntax highlighter used
3367 sub guess_file_syntax {
3368         my ($highlight, $mimetype, $file_name) = @_;
3369         return undef unless ($highlight && defined $file_name);
3370         my $basename = basename($file_name, '.in');
3371         return $highlight_basename{$basename}
3372                 if exists $highlight_basename{$basename};
3373
3374         $basename =~ /\.([^.]*)$/;
3375         my $ext = $1 or return undef;
3376         return $highlight_ext{$ext}
3377                 if exists $highlight_ext{$ext};
3378
3379         return undef;
3380 }
3381
3382 # run highlighter and return FD of its output,
3383 # or return original FD if no highlighting
3384 sub run_highlighter {
3385         my ($fd, $highlight, $syntax) = @_;
3386         return $fd unless ($highlight && defined $syntax);
3387
3388         close $fd
3389                 or die_error(404, "Reading blob failed");
3390         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3391                   quote_command($highlight_bin).
3392                   " --xhtml --fragment --syntax $syntax |"
3393                 or die_error(500, "Couldn't open file or run syntax highlighter");
3394         return $fd;
3395 }
3396
3397 ## ======================================================================
3398 ## functions printing HTML: header, footer, error page
3399
3400 sub get_page_title {
3401         my $title = to_utf8($site_name);
3402
3403         return $title unless (defined $project);
3404         $title .= " - " . to_utf8($project);
3405
3406         return $title unless (defined $action);
3407         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3408
3409         return $title unless (defined $file_name);
3410         $title .= " - " . esc_path($file_name);
3411         if ($action eq "tree" && $file_name !~ m|/$|) {
3412                 $title .= "/";
3413         }
3414
3415         return $title;
3416 }
3417
3418 sub git_header_html {
3419         my $status = shift || "200 OK";
3420         my $expires = shift;
3421         my %opts = @_;
3422
3423         my $title = get_page_title();
3424         my $content_type;
3425         # require explicit support from the UA if we are to send the page as
3426         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3427         # we have to do this because MSIE sometimes globs '*/*', pretending to
3428         # support xhtml+xml but choking when it gets what it asked for.
3429         if (defined $cgi->http('HTTP_ACCEPT') &&
3430             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3431             $cgi->Accept('application/xhtml+xml') != 0) {
3432                 $content_type = 'application/xhtml+xml';
3433         } else {
3434                 $content_type = 'text/html';
3435         }
3436         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3437                            -status=> $status, -expires => $expires)
3438                 unless ($opts{'-no_http_header'});
3439         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3440         print <<EOF;
3441 <?xml version="1.0" encoding="utf-8"?>
3442 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3443 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3444 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3445 <!-- git core binaries version $git_version -->
3446 <head>
3447 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3448 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3449 <meta name="robots" content="index, nofollow"/>
3450 <title>$title</title>
3451 EOF
3452         # the stylesheet, favicon etc urls won't work correctly with path_info
3453         # unless we set the appropriate base URL
3454         if ($ENV{'PATH_INFO'}) {
3455                 print "<base href=\"".esc_url($base_url)."\" />\n";
3456         }
3457         # print out each stylesheet that exist, providing backwards capability
3458         # for those people who defined $stylesheet in a config file
3459         if (defined $stylesheet) {
3460                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3461         } else {
3462                 foreach my $stylesheet (@stylesheets) {
3463                         next unless $stylesheet;
3464                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3465                 }
3466         }
3467         if (defined $project) {
3468                 my %href_params = get_feed_info();
3469                 if (!exists $href_params{'-title'}) {
3470                         $href_params{'-title'} = 'log';
3471                 }
3472
3473                 foreach my $format qw(RSS Atom) {
3474                         my $type = lc($format);
3475                         my %link_attr = (
3476                                 '-rel' => 'alternate',
3477                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3478                                 '-type' => "application/$type+xml"
3479                         );
3480
3481                         $href_params{'action'} = $type;
3482                         $link_attr{'-href'} = href(%href_params);
3483                         print "<link ".
3484                               "rel=\"$link_attr{'-rel'}\" ".
3485                               "title=\"$link_attr{'-title'}\" ".
3486                               "href=\"$link_attr{'-href'}\" ".
3487                               "type=\"$link_attr{'-type'}\" ".
3488                               "/>\n";
3489
3490                         $href_params{'extra_options'} = '--no-merges';
3491                         $link_attr{'-href'} = href(%href_params);
3492                         $link_attr{'-title'} .= ' (no merges)';
3493                         print "<link ".
3494                               "rel=\"$link_attr{'-rel'}\" ".
3495                               "title=\"$link_attr{'-title'}\" ".
3496                               "href=\"$link_attr{'-href'}\" ".
3497                               "type=\"$link_attr{'-type'}\" ".
3498                               "/>\n";
3499                 }
3500
3501         } else {
3502                 printf('<link rel="alternate" title="%s projects list" '.
3503                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3504                        $site_name, href(project=>undef, action=>"project_index"));
3505                 printf('<link rel="alternate" title="%s projects feeds" '.
3506                        'href="%s" type="text/x-opml" />'."\n",
3507                        $site_name, href(project=>undef, action=>"opml"));
3508         }
3509         if (defined $favicon) {
3510                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3511         }
3512
3513         print "</head>\n" .
3514               "<body>\n";
3515
3516         if (defined $site_header && -f $site_header) {
3517                 insert_file($site_header);
3518         }
3519
3520         print "<div class=\"page_header\">\n" .
3521               $cgi->a({-href => esc_url($logo_url),
3522                        -title => $logo_label},
3523                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3524         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3525         if (defined $project) {
3526                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3527                 if (defined $action) {
3528                         my $action_print = $action ;
3529                         if (defined $opts{-action_extra}) {
3530                                 $action_print = $cgi->a({-href => href(action=>$action)},
3531                                         $action);
3532                         }
3533                         print " / $action_print";
3534                 }
3535                 if (defined $opts{-action_extra}) {
3536                         print " / $opts{-action_extra}";
3537                 }
3538                 print "\n";
3539         }
3540         print "</div>\n";
3541
3542         my $have_search = gitweb_check_feature('search');
3543         if (defined $project && $have_search) {
3544                 if (!defined $searchtext) {
3545                         $searchtext = "";
3546                 }
3547                 my $search_hash;
3548                 if (defined $hash_base) {
3549                         $search_hash = $hash_base;
3550                 } elsif (defined $hash) {
3551                         $search_hash = $hash;
3552                 } else {
3553                         $search_hash = "HEAD";
3554                 }
3555                 my $action = $my_uri;
3556                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3557                 if ($use_pathinfo) {
3558                         $action .= "/".esc_url($project);
3559                 }
3560                 print $cgi->startform(-method => "get", -action => $action) .
3561                       "<div class=\"search\">\n" .
3562                       (!$use_pathinfo &&
3563                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3564                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3565                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3566                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3567                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3568                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3569                       " search:\n",
3570                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3571                       "<span title=\"Extended regular expression\">" .
3572                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3573                                      -checked => $search_use_regexp) .
3574                       "</span>" .
3575                       "</div>" .
3576                       $cgi->end_form() . "\n";
3577         }
3578 }
3579
3580 sub git_footer_html {
3581         my $feed_class = 'rss_logo';
3582
3583         print "<div class=\"page_footer\">\n";
3584         if (defined $project) {
3585                 my $descr = git_get_project_description($project);
3586                 if (defined $descr) {
3587                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3588                 }
3589
3590                 my %href_params = get_feed_info();
3591                 if (!%href_params) {
3592                         $feed_class .= ' generic';
3593                 }
3594                 $href_params{'-title'} ||= 'log';
3595
3596                 foreach my $format qw(RSS Atom) {
3597                         $href_params{'action'} = lc($format);
3598                         print $cgi->a({-href => href(%href_params),
3599                                       -title => "$href_params{'-title'} $format feed",
3600                                       -class => $feed_class}, $format)."\n";
3601                 }
3602
3603         } else {
3604                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3605                               -class => $feed_class}, "OPML") . " ";
3606                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3607                               -class => $feed_class}, "TXT") . "\n";
3608         }
3609         print "</div>\n"; # class="page_footer"
3610
3611         if (defined $t0 && gitweb_check_feature('timed')) {
3612                 print "<div id=\"generating_info\">\n";
3613                 print 'This page took '.
3614                       '<span id="generating_time" class="time_span">'.
3615                       tv_interval($t0, [ gettimeofday() ]).
3616                       ' seconds </span>'.
3617                       ' and '.
3618                       '<span id="generating_cmd">'.
3619                       $number_of_git_cmds.
3620                       '</span> git commands '.
3621                       " to generate.\n";
3622                 print "</div>\n"; # class="page_footer"
3623         }
3624
3625         if (defined $site_footer && -f $site_footer) {
3626                 insert_file($site_footer);
3627         }
3628
3629         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3630         if (defined $action &&
3631             $action eq 'blame_incremental') {
3632                 print qq!<script type="text/javascript">\n!.
3633                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3634                       qq!           "!. href() .qq!");\n!.
3635                       qq!</script>\n!;
3636         } elsif (gitweb_check_feature('javascript-actions')) {
3637                 print qq!<script type="text/javascript">\n!.
3638                       qq!window.onload = fixLinks;\n!.
3639                       qq!</script>\n!;
3640         }
3641
3642         print "</body>\n" .
3643               "</html>";
3644 }
3645
3646 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3647 # Example: die_error(404, 'Hash not found')
3648 # By convention, use the following status codes (as defined in RFC 2616):
3649 # 400: Invalid or missing CGI parameters, or
3650 #      requested object exists but has wrong type.
3651 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3652 #      this server or project.
3653 # 404: Requested object/revision/project doesn't exist.
3654 # 500: The server isn't configured properly, or
3655 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3656 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3657 # 503: The server is currently unavailable (because it is overloaded,
3658 #      or down for maintenance).  Generally, this is a temporary state.
3659 sub die_error {
3660         my $status = shift || 500;
3661         my $error = esc_html(shift) || "Internal Server Error";
3662         my $extra = shift;
3663         my %opts = @_;
3664
3665         my %http_responses = (
3666                 400 => '400 Bad Request',
3667                 403 => '403 Forbidden',
3668                 404 => '404 Not Found',
3669                 500 => '500 Internal Server Error',
3670                 503 => '503 Service Unavailable',
3671         );
3672         git_header_html($http_responses{$status}, undef, %opts);
3673         print <<EOF;
3674 <div class="page_body">
3675 <br /><br />
3676 $status - $error
3677 <br />
3678 EOF
3679         if (defined $extra) {
3680                 print "<hr />\n" .
3681                       "$extra\n";
3682         }
3683         print "</div>\n";
3684
3685         git_footer_html();
3686         goto DONE_GITWEB
3687                 unless ($opts{'-error_handler'});
3688 }
3689
3690 ## ----------------------------------------------------------------------
3691 ## functions printing or outputting HTML: navigation
3692
3693 sub git_print_page_nav {
3694         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3695         $extra = '' if !defined $extra; # pager or formats
3696
3697         my @navs = qw(summary shortlog log commit commitdiff tree);
3698         if ($suppress) {
3699                 @navs = grep { $_ ne $suppress } @navs;
3700         }
3701
3702         my %arg = map { $_ => {action=>$_} } @navs;
3703         if (defined $head) {
3704                 for (qw(commit commitdiff)) {
3705                         $arg{$_}{'hash'} = $head;
3706                 }
3707                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3708                         for (qw(shortlog log)) {
3709                                 $arg{$_}{'hash'} = $head;
3710                         }
3711                 }
3712         }
3713
3714         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3715         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3716
3717         my @actions = gitweb_get_feature('actions');
3718         my %repl = (
3719                 '%' => '%',
3720                 'n' => $project,         # project name
3721                 'f' => $git_dir,         # project path within filesystem
3722                 'h' => $treehead || '',  # current hash ('h' parameter)
3723                 'b' => $treebase || '',  # hash base ('hb' parameter)
3724         );
3725         while (@actions) {
3726                 my ($label, $link, $pos) = splice(@actions,0,3);
3727                 # insert
3728                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3729                 # munch munch
3730                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3731                 $arg{$label}{'_href'} = $link;
3732         }
3733
3734         print "<div class=\"page_nav\">\n" .
3735                 (join " | ",
3736                  map { $_ eq $current ?
3737                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3738                  } @navs);
3739         print "<br/>\n$extra<br/>\n" .
3740               "</div>\n";
3741 }
3742
3743 # returns a submenu for the nagivation of the refs views (tags, heads,
3744 # remotes) with the current view disabled and the remotes view only
3745 # available if the feature is enabled
3746 sub format_ref_views {
3747         my ($current) = @_;
3748         my @ref_views = qw{tags heads};
3749         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3750         return join " | ", map {
3751                 $_ eq $current ? $_ :
3752                 $cgi->a({-href => href(action=>$_)}, $_)
3753         } @ref_views
3754 }
3755
3756 sub format_paging_nav {
3757         my ($action, $page, $has_next_link) = @_;
3758         my $paging_nav;
3759
3760
3761         if ($page > 0) {
3762                 $paging_nav .=
3763                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3764                         " &sdot; " .
3765                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3766                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3767         } else {
3768                 $paging_nav .= "first &sdot; prev";
3769         }
3770
3771         if ($has_next_link) {
3772                 $paging_nav .= " &sdot; " .
3773                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3774                                  -accesskey => "n", -title => "Alt-n"}, "next");
3775         } else {
3776                 $paging_nav .= " &sdot; next";
3777         }
3778
3779         return $paging_nav;
3780 }
3781
3782 ## ......................................................................
3783 ## functions printing or outputting HTML: div
3784
3785 sub git_print_header_div {
3786         my ($action, $title, $hash, $hash_base) = @_;
3787         my %args = ();
3788
3789         $args{'action'} = $action;
3790         $args{'hash'} = $hash if $hash;
3791         $args{'hash_base'} = $hash_base if $hash_base;
3792
3793         print "<div class=\"header\">\n" .
3794               $cgi->a({-href => href(%args), -class => "title"},
3795               $title ? $title : $action) .
3796               "\n</div>\n";
3797 }
3798
3799 sub format_repo_url {
3800         my ($name, $url) = @_;
3801         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3802 }
3803
3804 # Group output by placing it in a DIV element and adding a header.
3805 # Options for start_div() can be provided by passing a hash reference as the
3806 # first parameter to the function.
3807 # Options to git_print_header_div() can be provided by passing an array
3808 # reference. This must follow the options to start_div if they are present.
3809 # The content can be a scalar, which is output as-is, a scalar reference, which
3810 # is output after html escaping, an IO handle passed either as *handle or
3811 # *handle{IO}, or a function reference. In the latter case all following
3812 # parameters will be taken as argument to the content function call.
3813 sub git_print_section {
3814         my ($div_args, $header_args, $content);
3815         my $arg = shift;
3816         if (ref($arg) eq 'HASH') {
3817                 $div_args = $arg;
3818                 $arg = shift;
3819         }
3820         if (ref($arg) eq 'ARRAY') {
3821                 $header_args = $arg;
3822                 $arg = shift;
3823         }
3824         $content = $arg;
3825
3826         print $cgi->start_div($div_args);
3827         git_print_header_div(@$header_args);
3828
3829         if (ref($content) eq 'CODE') {
3830                 $content->(@_);
3831         } elsif (ref($content) eq 'SCALAR') {
3832                 print esc_html($$content);
3833         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3834                 print <$content>;
3835         } elsif (!ref($content) && defined($content)) {
3836                 print $content;
3837         }
3838
3839         print $cgi->end_div;
3840 }
3841
3842 sub print_local_time {
3843         print format_local_time(@_);
3844 }
3845
3846 sub format_local_time {
3847         my $localtime = '';
3848         my %date = @_;
3849         if ($date{'hour_local'} < 6) {
3850                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3851                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3852         } else {
3853                 $localtime .= sprintf(" (%02d:%02d %s)",
3854                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3855         }
3856
3857         return $localtime;
3858 }
3859
3860 # Outputs the author name and date in long form
3861 sub git_print_authorship {
3862         my $co = shift;
3863         my %opts = @_;
3864         my $tag = $opts{-tag} || 'div';
3865         my $author = $co->{'author_name'};
3866
3867         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3868         print "<$tag class=\"author_date\">" .
3869               format_search_author($author, "author", esc_html($author)) .
3870               " [$ad{'rfc2822'}";
3871         print_local_time(%ad) if ($opts{-localtime});
3872         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3873                   . "</$tag>\n";
3874 }
3875
3876 # Outputs table rows containing the full author or committer information,
3877 # in the format expected for 'commit' view (& similar).
3878 # Parameters are a commit hash reference, followed by the list of people
3879 # to output information for. If the list is empty it defaults to both
3880 # author and committer.
3881 sub git_print_authorship_rows {
3882         my $co = shift;
3883         # too bad we can't use @people = @_ || ('author', 'committer')
3884         my @people = @_;
3885         @people = ('author', 'committer') unless @people;
3886         foreach my $who (@people) {
3887                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3888                 print "<tr><td>$who</td><td>" .
3889                       format_search_author($co->{"${who}_name"}, $who,
3890                                esc_html($co->{"${who}_name"})) . " " .
3891                       format_search_author($co->{"${who}_email"}, $who,
3892                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3893                       "</td><td rowspan=\"2\">" .
3894                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3895                       "</td></tr>\n" .
3896                       "<tr>" .
3897                       "<td></td><td> $wd{'rfc2822'}";
3898                 print_local_time(%wd);
3899                 print "</td>" .
3900                       "</tr>\n";
3901         }
3902 }
3903
3904 sub git_print_page_path {
3905         my $name = shift;
3906         my $type = shift;
3907         my $hb = shift;
3908
3909
3910         print "<div class=\"page_path\">";
3911         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3912                       -title => 'tree root'}, to_utf8("[$project]"));
3913         print " / ";
3914         if (defined $name) {
3915                 my @dirname = split '/', $name;
3916                 my $basename = pop @dirname;
3917                 my $fullname = '';
3918
3919                 foreach my $dir (@dirname) {
3920                         $fullname .= ($fullname ? '/' : '') . $dir;
3921                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3922                                                      hash_base=>$hb),
3923                                       -title => $fullname}, esc_path($dir));
3924                         print " / ";
3925                 }
3926                 if (defined $type && $type eq 'blob') {
3927                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3928                                                      hash_base=>$hb),
3929                                       -title => $name}, esc_path($basename));
3930                 } elsif (defined $type && $type eq 'tree') {
3931                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3932                                                      hash_base=>$hb),
3933                                       -title => $name}, esc_path($basename));
3934                         print " / ";
3935                 } else {
3936                         print esc_path($basename);
3937                 }
3938         }
3939         print "<br/></div>\n";
3940 }
3941
3942 sub git_print_log {
3943         my $log = shift;
3944         my %opts = @_;
3945
3946         if ($opts{'-remove_title'}) {
3947                 # remove title, i.e. first line of log
3948                 shift @$log;
3949         }
3950         # remove leading empty lines
3951         while (defined $log->[0] && $log->[0] eq "") {
3952                 shift @$log;
3953         }
3954
3955         # print log
3956         my $signoff = 0;
3957         my $empty = 0;
3958         foreach my $line (@$log) {
3959                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3960                         $signoff = 1;
3961                         $empty = 0;
3962                         if (! $opts{'-remove_signoff'}) {
3963                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3964                                 next;
3965                         } else {
3966                                 # remove signoff lines
3967                                 next;
3968                         }
3969                 } else {
3970                         $signoff = 0;
3971                 }
3972
3973                 # print only one empty line
3974                 # do not print empty line after signoff
3975                 if ($line eq "") {
3976                         next if ($empty || $signoff);
3977                         $empty = 1;
3978                 } else {
3979                         $empty = 0;
3980                 }
3981
3982                 print format_log_line_html($line) . "<br/>\n";
3983         }
3984
3985         if ($opts{'-final_empty_line'}) {
3986                 # end with single empty line
3987                 print "<br/>\n" unless $empty;
3988         }
3989 }
3990
3991 # return link target (what link points to)
3992 sub git_get_link_target {
3993         my $hash = shift;
3994         my $link_target;
3995
3996         # read link
3997         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3998                 or return;
3999         {
4000                 local $/ = undef;
4001                 $link_target = <$fd>;
4002         }
4003         close $fd
4004                 or return;
4005
4006         return $link_target;
4007 }
4008
4009 # given link target, and the directory (basedir) the link is in,
4010 # return target of link relative to top directory (top tree);
4011 # return undef if it is not possible (including absolute links).
4012 sub normalize_link_target {
4013         my ($link_target, $basedir) = @_;
4014
4015         # absolute symlinks (beginning with '/') cannot be normalized
4016         return if (substr($link_target, 0, 1) eq '/');
4017
4018         # normalize link target to path from top (root) tree (dir)
4019         my $path;
4020         if ($basedir) {
4021                 $path = $basedir . '/' . $link_target;
4022         } else {
4023                 # we are in top (root) tree (dir)
4024                 $path = $link_target;
4025         }
4026
4027         # remove //, /./, and /../
4028         my @path_parts;
4029         foreach my $part (split('/', $path)) {
4030                 # discard '.' and ''
4031                 next if (!$part || $part eq '.');
4032                 # handle '..'
4033                 if ($part eq '..') {
4034                         if (@path_parts) {
4035                                 pop @path_parts;
4036                         } else {
4037                                 # link leads outside repository (outside top dir)
4038                                 return;
4039                         }
4040                 } else {
4041                         push @path_parts, $part;
4042                 }
4043         }
4044         $path = join('/', @path_parts);
4045
4046         return $path;
4047 }
4048
4049 # print tree entry (row of git_tree), but without encompassing <tr> element
4050 sub git_print_tree_entry {
4051         my ($t, $basedir, $hash_base, $have_blame) = @_;
4052
4053         my %base_key = ();
4054         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4055
4056         # The format of a table row is: mode list link.  Where mode is
4057         # the mode of the entry, list is the name of the entry, an href,
4058         # and link is the action links of the entry.
4059
4060         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4061         if (exists $t->{'size'}) {
4062                 print "<td class=\"size\">$t->{'size'}</td>\n";
4063         }
4064         if ($t->{'type'} eq "blob") {
4065                 print "<td class=\"list\">" .
4066                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4067                                                file_name=>"$basedir$t->{'name'}", %base_key),
4068                                 -class => "list"}, esc_path($t->{'name'}));
4069                 if (S_ISLNK(oct $t->{'mode'})) {
4070                         my $link_target = git_get_link_target($t->{'hash'});
4071                         if ($link_target) {
4072                                 my $norm_target = normalize_link_target($link_target, $basedir);
4073                                 if (defined $norm_target) {
4074                                         print " -> " .
4075                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4076                                                                      file_name=>$norm_target),
4077                                                        -title => $norm_target}, esc_path($link_target));
4078                                 } else {
4079                                         print " -> " . esc_path($link_target);
4080                                 }
4081                         }
4082                 }
4083                 print "</td>\n";
4084                 print "<td class=\"link\">";
4085                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4086                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4087                               "blob");
4088                 if ($have_blame) {
4089                         print " | " .
4090                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4091                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4092                                       "blame");
4093                 }
4094                 if (defined $hash_base) {
4095                         print " | " .
4096                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4097                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4098                                       "history");
4099                 }
4100                 print " | " .
4101                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4102                                                file_name=>"$basedir$t->{'name'}")},
4103                                 "raw");
4104                 print "</td>\n";
4105
4106         } elsif ($t->{'type'} eq "tree") {
4107                 print "<td class=\"list\">";
4108                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4109                                              file_name=>"$basedir$t->{'name'}",
4110                                              %base_key)},
4111                               esc_path($t->{'name'}));
4112                 print "</td>\n";
4113                 print "<td class=\"link\">";
4114                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4115                                              file_name=>"$basedir$t->{'name'}",
4116                                              %base_key)},
4117                               "tree");
4118                 if (defined $hash_base) {
4119                         print " | " .
4120                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4121                                                      file_name=>"$basedir$t->{'name'}")},
4122                                       "history");
4123                 }
4124                 print "</td>\n";
4125         } else {
4126                 # unknown object: we can only present history for it
4127                 # (this includes 'commit' object, i.e. submodule support)
4128                 print "<td class=\"list\">" .
4129                       esc_path($t->{'name'}) .
4130                       "</td>\n";
4131                 print "<td class=\"link\">";
4132                 if (defined $hash_base) {
4133                         print $cgi->a({-href => href(action=>"history",
4134                                                      hash_base=>$hash_base,
4135                                                      file_name=>"$basedir$t->{'name'}")},
4136                                       "history");
4137                 }
4138                 print "</td>\n";
4139         }
4140 }
4141
4142 ## ......................................................................
4143 ## functions printing large fragments of HTML
4144
4145 # get pre-image filenames for merge (combined) diff
4146 sub fill_from_file_info {
4147         my ($diff, @parents) = @_;
4148
4149         $diff->{'from_file'} = [ ];
4150         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4151         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4152                 if ($diff->{'status'}[$i] eq 'R' ||
4153                     $diff->{'status'}[$i] eq 'C') {
4154                         $diff->{'from_file'}[$i] =
4155                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4156                 }
4157         }
4158
4159         return $diff;
4160 }
4161
4162 # is current raw difftree line of file deletion
4163 sub is_deleted {
4164         my $diffinfo = shift;
4165
4166         return $diffinfo->{'to_id'} eq ('0' x 40);
4167 }
4168
4169 # does patch correspond to [previous] difftree raw line
4170 # $diffinfo  - hashref of parsed raw diff format
4171 # $patchinfo - hashref of parsed patch diff format
4172 #              (the same keys as in $diffinfo)
4173 sub is_patch_split {
4174         my ($diffinfo, $patchinfo) = @_;
4175
4176         return defined $diffinfo && defined $patchinfo
4177                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4178 }
4179
4180
4181 sub git_difftree_body {
4182         my ($difftree, $hash, @parents) = @_;
4183         my ($parent) = $parents[0];
4184         my $have_blame = gitweb_check_feature('blame');
4185         print "<div class=\"list_head\">\n";
4186         if ($#{$difftree} > 10) {
4187                 print(($#{$difftree} + 1) . " files changed:\n");
4188         }
4189         print "</div>\n";
4190
4191         print "<table class=\"" .
4192               (@parents > 1 ? "combined " : "") .
4193               "diff_tree\">\n";
4194
4195         # header only for combined diff in 'commitdiff' view
4196         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4197         if ($has_header) {
4198                 # table header
4199                 print "<thead><tr>\n" .
4200                        "<th></th><th></th>\n"; # filename, patchN link
4201                 for (my $i = 0; $i < @parents; $i++) {
4202                         my $par = $parents[$i];
4203                         print "<th>" .
4204                               $cgi->a({-href => href(action=>"commitdiff",
4205                                                      hash=>$hash, hash_parent=>$par),
4206                                        -title => 'commitdiff to parent number ' .
4207                                                   ($i+1) . ': ' . substr($par,0,7)},
4208                                       $i+1) .
4209                               "&nbsp;</th>\n";
4210                 }
4211                 print "</tr></thead>\n<tbody>\n";
4212         }
4213
4214         my $alternate = 1;
4215         my $patchno = 0;
4216         foreach my $line (@{$difftree}) {
4217                 my $diff = parsed_difftree_line($line);
4218
4219                 if ($alternate) {
4220                         print "<tr class=\"dark\">\n";
4221                 } else {
4222                         print "<tr class=\"light\">\n";
4223                 }
4224                 $alternate ^= 1;
4225
4226                 if (exists $diff->{'nparents'}) { # combined diff
4227
4228                         fill_from_file_info($diff, @parents)
4229                                 unless exists $diff->{'from_file'};
4230
4231                         if (!is_deleted($diff)) {
4232                                 # file exists in the result (child) commit
4233                                 print "<td>" .
4234                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4235                                                              file_name=>$diff->{'to_file'},
4236                                                              hash_base=>$hash),
4237                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4238                                       "</td>\n";
4239                         } else {
4240                                 print "<td>" .
4241                                       esc_path($diff->{'to_file'}) .
4242                                       "</td>\n";
4243                         }
4244
4245                         if ($action eq 'commitdiff') {
4246                                 # link to patch
4247                                 $patchno++;
4248                                 print "<td class=\"link\">" .
4249                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4250                                       " | " .
4251                                       "</td>\n";
4252                         }
4253
4254                         my $has_history = 0;
4255                         my $not_deleted = 0;
4256                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4257                                 my $hash_parent = $parents[$i];
4258                                 my $from_hash = $diff->{'from_id'}[$i];
4259                                 my $from_path = $diff->{'from_file'}[$i];
4260                                 my $status = $diff->{'status'}[$i];
4261
4262                                 $has_history ||= ($status ne 'A');
4263                                 $not_deleted ||= ($status ne 'D');
4264
4265                                 if ($status eq 'A') {
4266                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4267                                 } elsif ($status eq 'D') {
4268                                         print "<td class=\"link\">" .
4269                                               $cgi->a({-href => href(action=>"blob",
4270                                                                      hash_base=>$hash,
4271                                                                      hash=>$from_hash,
4272                                                                      file_name=>$from_path)},
4273                                                       "blob" . ($i+1)) .
4274                                               " | </td>\n";
4275                                 } else {
4276                                         if ($diff->{'to_id'} eq $from_hash) {
4277                                                 print "<td class=\"link nochange\">";
4278                                         } else {
4279                                                 print "<td class=\"link\">";
4280                                         }
4281                                         print $cgi->a({-href => href(action=>"blobdiff",
4282                                                                      hash=>$diff->{'to_id'},
4283                                                                      hash_parent=>$from_hash,
4284                                                                      hash_base=>$hash,
4285                                                                      hash_parent_base=>$hash_parent,
4286                                                                      file_name=>$diff->{'to_file'},
4287                                                                      file_parent=>$from_path)},
4288                                                       "diff" . ($i+1)) .
4289                                               " | </td>\n";
4290                                 }
4291                         }
4292
4293                         print "<td class=\"link\">";
4294                         if ($not_deleted) {
4295                                 print $cgi->a({-href => href(action=>"blob",
4296                                                              hash=>$diff->{'to_id'},
4297                                                              file_name=>$diff->{'to_file'},
4298                                                              hash_base=>$hash)},
4299                                               "blob");
4300                                 print " | " if ($has_history);
4301                         }
4302                         if ($has_history) {
4303                                 print $cgi->a({-href => href(action=>"history",
4304                                                              file_name=>$diff->{'to_file'},
4305                                                              hash_base=>$hash)},
4306                                               "history");
4307                         }
4308                         print "</td>\n";
4309
4310                         print "</tr>\n";
4311                         next; # instead of 'else' clause, to avoid extra indent
4312                 }
4313                 # else ordinary diff
4314
4315                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4316                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4317                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4318                         $to_mode_oct = oct $diff->{'to_mode'};
4319                         if (S_ISREG($to_mode_oct)) { # only for regular file
4320                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4321                         }
4322                         $to_file_type = file_type($diff->{'to_mode'});
4323                 }
4324                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4325                         $from_mode_oct = oct $diff->{'from_mode'};
4326                         if (S_ISREG($to_mode_oct)) { # only for regular file
4327                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4328                         }
4329                         $from_file_type = file_type($diff->{'from_mode'});
4330                 }
4331
4332                 if ($diff->{'status'} eq "A") { # created
4333                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4334                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4335                         $mode_chng   .= "]</span>";
4336                         print "<td>";
4337                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4338                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4339                                       -class => "list"}, esc_path($diff->{'file'}));
4340                         print "</td>\n";
4341                         print "<td>$mode_chng</td>\n";
4342                         print "<td class=\"link\">";
4343                         if ($action eq 'commitdiff') {
4344                                 # link to patch
4345                                 $patchno++;
4346                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4347                                 print " | ";
4348                         }
4349                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4350                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4351                                       "blob");
4352                         print "</td>\n";
4353
4354                 } elsif ($diff->{'status'} eq "D") { # deleted
4355                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4356                         print "<td>";
4357                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4358                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4359                                        -class => "list"}, esc_path($diff->{'file'}));
4360                         print "</td>\n";
4361                         print "<td>$mode_chng</td>\n";
4362                         print "<td class=\"link\">";
4363                         if ($action eq 'commitdiff') {
4364                                 # link to patch
4365                                 $patchno++;
4366                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4367                                 print " | ";
4368                         }
4369                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4370                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4371                                       "blob") . " | ";
4372                         if ($have_blame) {
4373                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4374                                                              file_name=>$diff->{'file'})},
4375                                               "blame") . " | ";
4376                         }
4377                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4378                                                      file_name=>$diff->{'file'})},
4379                                       "history");
4380                         print "</td>\n";
4381
4382                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4383                         my $mode_chnge = "";
4384                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4385                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4386                                 if ($from_file_type ne $to_file_type) {
4387                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4388                                 }
4389                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4390                                         if ($from_mode_str && $to_mode_str) {
4391                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4392                                         } elsif ($to_mode_str) {
4393                                                 $mode_chnge .= " mode: $to_mode_str";
4394                                         }
4395                                 }
4396                                 $mode_chnge .= "]</span>\n";
4397                         }
4398                         print "<td>";
4399                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4400                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4401                                       -class => "list"}, esc_path($diff->{'file'}));
4402                         print "</td>\n";
4403                         print "<td>$mode_chnge</td>\n";
4404                         print "<td class=\"link\">";
4405                         if ($action eq 'commitdiff') {
4406                                 # link to patch
4407                                 $patchno++;
4408                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4409                                       " | ";
4410                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4411                                 # "commit" view and modified file (not onlu mode changed)
4412                                 print $cgi->a({-href => href(action=>"blobdiff",
4413                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4414                                                              hash_base=>$hash, hash_parent_base=>$parent,
4415                                                              file_name=>$diff->{'file'})},
4416                                               "diff") .
4417                                       " | ";
4418                         }
4419                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4420                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4421                                        "blob") . " | ";
4422                         if ($have_blame) {
4423                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4424                                                              file_name=>$diff->{'file'})},
4425                                               "blame") . " | ";
4426                         }
4427                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4428                                                      file_name=>$diff->{'file'})},
4429                                       "history");
4430                         print "</td>\n";
4431
4432                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4433                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4434                         my $nstatus = $status_name{$diff->{'status'}};
4435                         my $mode_chng = "";
4436                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4437                                 # mode also for directories, so we cannot use $to_mode_str
4438                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4439                         }
4440                         print "<td>" .
4441                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4442                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4443                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4444                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4445                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4446                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4447                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4448                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4449                               "<td class=\"link\">";
4450                         if ($action eq 'commitdiff') {
4451                                 # link to patch
4452                                 $patchno++;
4453                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4454                                       " | ";
4455                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4456                                 # "commit" view and modified file (not only pure rename or copy)
4457                                 print $cgi->a({-href => href(action=>"blobdiff",
4458                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4459                                                              hash_base=>$hash, hash_parent_base=>$parent,
4460                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4461                                               "diff") .
4462                                       " | ";
4463                         }
4464                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4465                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4466                                       "blob") . " | ";
4467                         if ($have_blame) {
4468                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4469                                                              file_name=>$diff->{'to_file'})},
4470                                               "blame") . " | ";
4471                         }
4472                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4473                                                     file_name=>$diff->{'to_file'})},
4474                                       "history");
4475                         print "</td>\n";
4476
4477                 } # we should not encounter Unmerged (U) or Unknown (X) status
4478                 print "</tr>\n";
4479         }
4480         print "</tbody>" if $has_header;
4481         print "</table>\n";
4482 }
4483
4484 sub git_patchset_body {
4485         my ($fd, $difftree, $hash, @hash_parents) = @_;
4486         my ($hash_parent) = $hash_parents[0];
4487
4488         my $is_combined = (@hash_parents > 1);
4489         my $patch_idx = 0;
4490         my $patch_number = 0;
4491         my $patch_line;
4492         my $diffinfo;
4493         my $to_name;
4494         my (%from, %to);
4495
4496         print "<div class=\"patchset\">\n";
4497
4498         # skip to first patch
4499         while ($patch_line = <$fd>) {
4500                 chomp $patch_line;
4501
4502                 last if ($patch_line =~ m/^diff /);
4503         }
4504
4505  PATCH:
4506         while ($patch_line) {
4507
4508                 # parse "git diff" header line
4509                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4510                         # $1 is from_name, which we do not use
4511                         $to_name = unquote($2);
4512                         $to_name =~ s!^b/!!;
4513                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4514                         # $1 is 'cc' or 'combined', which we do not use
4515                         $to_name = unquote($2);
4516                 } else {
4517                         $to_name = undef;
4518                 }
4519
4520                 # check if current patch belong to current raw line
4521                 # and parse raw git-diff line if needed
4522                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4523                         # this is continuation of a split patch
4524                         print "<div class=\"patch cont\">\n";
4525                 } else {
4526                         # advance raw git-diff output if needed
4527                         $patch_idx++ if defined $diffinfo;
4528
4529                         # read and prepare patch information
4530                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4531
4532                         # compact combined diff output can have some patches skipped
4533                         # find which patch (using pathname of result) we are at now;
4534                         if ($is_combined) {
4535                                 while ($to_name ne $diffinfo->{'to_file'}) {
4536                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4537                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4538                                               "</div>\n";  # class="patch"
4539
4540                                         $patch_idx++;
4541                                         $patch_number++;
4542
4543                                         last if $patch_idx > $#$difftree;
4544                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4545                                 }
4546                         }
4547
4548                         # modifies %from, %to hashes
4549                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4550
4551                         # this is first patch for raw difftree line with $patch_idx index
4552                         # we index @$difftree array from 0, but number patches from 1
4553                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4554                 }
4555
4556                 # git diff header
4557                 #assert($patch_line =~ m/^diff /) if DEBUG;
4558                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4559                 $patch_number++;
4560                 # print "git diff" header
4561                 print format_git_diff_header_line($patch_line, $diffinfo,
4562                                                   \%from, \%to);
4563
4564                 # print extended diff header
4565                 print "<div class=\"diff extended_header\">\n";
4566         EXTENDED_HEADER:
4567                 while ($patch_line = <$fd>) {
4568                         chomp $patch_line;
4569
4570                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4571
4572                         print format_extended_diff_header_line($patch_line, $diffinfo,
4573                                                                \%from, \%to);
4574                 }
4575                 print "</div>\n"; # class="diff extended_header"
4576
4577                 # from-file/to-file diff header
4578                 if (! $patch_line) {
4579                         print "</div>\n"; # class="patch"
4580                         last PATCH;
4581                 }
4582                 next PATCH if ($patch_line =~ m/^diff /);
4583                 #assert($patch_line =~ m/^---/) if DEBUG;
4584
4585                 my $last_patch_line = $patch_line;
4586                 $patch_line = <$fd>;
4587                 chomp $patch_line;
4588                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4589
4590                 print format_diff_from_to_header($last_patch_line, $patch_line,
4591                                                  $diffinfo, \%from, \%to,
4592                                                  @hash_parents);
4593
4594                 # the patch itself
4595         LINE:
4596                 while ($patch_line = <$fd>) {
4597                         chomp $patch_line;
4598
4599                         next PATCH if ($patch_line =~ m/^diff /);
4600
4601                         print format_diff_line($patch_line, \%from, \%to);
4602                 }
4603
4604         } continue {
4605                 print "</div>\n"; # class="patch"
4606         }
4607
4608         # for compact combined (--cc) format, with chunk and patch simplification
4609         # the patchset might be empty, but there might be unprocessed raw lines
4610         for (++$patch_idx if $patch_number > 0;
4611              $patch_idx < @$difftree;
4612              ++$patch_idx) {
4613                 # read and prepare patch information
4614                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4615
4616                 # generate anchor for "patch" links in difftree / whatchanged part
4617                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4618                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4619                       "</div>\n";  # class="patch"
4620
4621                 $patch_number++;
4622         }
4623
4624         if ($patch_number == 0) {
4625                 if (@hash_parents > 1) {
4626                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4627                 } else {
4628                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4629                 }
4630         }
4631
4632         print "</div>\n"; # class="patchset"
4633 }
4634
4635 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4636
4637 # fills project list info (age, description, owner, forks) for each
4638 # project in the list, removing invalid projects from returned list
4639 # NOTE: modifies $projlist, but does not remove entries from it
4640 sub fill_project_list_info {
4641         my ($projlist, $check_forks) = @_;
4642         my @projects;
4643
4644         my $show_ctags = gitweb_check_feature('ctags');
4645  PROJECT:
4646         foreach my $pr (@$projlist) {
4647                 my (@activity) = git_get_last_activity($pr->{'path'});
4648                 unless (@activity) {
4649                         next PROJECT;
4650                 }
4651                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4652                 if (!defined $pr->{'descr'}) {
4653                         my $descr = git_get_project_description($pr->{'path'}) || "";
4654                         $descr = to_utf8($descr);
4655                         $pr->{'descr_long'} = $descr;
4656                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4657                 }
4658                 if (!defined $pr->{'owner'}) {
4659                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4660                 }
4661                 if ($check_forks) {
4662                         my $pname = $pr->{'path'};
4663                         if (($pname =~ s/\.git$//) &&
4664                             ($pname !~ /\/$/) &&
4665                             (-d "$projectroot/$pname")) {
4666                                 $pr->{'forks'} = "-d $projectroot/$pname";
4667                         } else {
4668                                 $pr->{'forks'} = 0;
4669                         }
4670                 }
4671                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4672                 push @projects, $pr;
4673         }
4674
4675         return @projects;
4676 }
4677
4678 # print 'sort by' <th> element, generating 'sort by $name' replay link
4679 # if that order is not selected
4680 sub print_sort_th {
4681         print format_sort_th(@_);
4682 }
4683
4684 sub format_sort_th {
4685         my ($name, $order, $header) = @_;
4686         my $sort_th = "";
4687         $header ||= ucfirst($name);
4688
4689         if ($order eq $name) {
4690                 $sort_th .= "<th>$header</th>\n";
4691         } else {
4692                 $sort_th .= "<th>" .
4693                             $cgi->a({-href => href(-replay=>1, order=>$name),
4694                                      -class => "header"}, $header) .
4695                             "</th>\n";
4696         }
4697
4698         return $sort_th;
4699 }
4700
4701 sub git_project_list_body {
4702         # actually uses global variable $project
4703         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4704
4705         my $check_forks = gitweb_check_feature('forks');
4706         my @projects = fill_project_list_info($projlist, $check_forks);
4707
4708         $order ||= $default_projects_order;
4709         $from = 0 unless defined $from;
4710         $to = $#projects if (!defined $to || $#projects < $to);
4711
4712         my %order_info = (
4713                 project => { key => 'path', type => 'str' },
4714                 descr => { key => 'descr_long', type => 'str' },
4715                 owner => { key => 'owner', type => 'str' },
4716                 age => { key => 'age', type => 'num' }
4717         );
4718         my $oi = $order_info{$order};
4719         if ($oi->{'type'} eq 'str') {
4720                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4721         } else {
4722                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4723         }
4724
4725         my $show_ctags = gitweb_check_feature('ctags');
4726         if ($show_ctags) {
4727                 my %ctags;
4728                 foreach my $p (@projects) {
4729                         foreach my $ct (keys %{$p->{'ctags'}}) {
4730                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4731                         }
4732                 }
4733                 my $cloud = git_populate_project_tagcloud(\%ctags);
4734                 print git_show_project_tagcloud($cloud, 64);
4735         }
4736
4737         print "<table class=\"project_list\">\n";
4738         unless ($no_header) {
4739                 print "<tr>\n";
4740                 if ($check_forks) {
4741                         print "<th></th>\n";
4742                 }
4743                 print_sort_th('project', $order, 'Project');
4744                 print_sort_th('descr', $order, 'Description');
4745                 print_sort_th('owner', $order, 'Owner');
4746                 print_sort_th('age', $order, 'Last Change');
4747                 print "<th></th>\n" . # for links
4748                       "</tr>\n";
4749         }
4750         my $alternate = 1;
4751         my $tagfilter = $cgi->param('by_tag');
4752         for (my $i = $from; $i <= $to; $i++) {
4753                 my $pr = $projects[$i];
4754
4755                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4756                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4757                         and not $pr->{'descr_long'} =~ /$searchtext/;
4758                 # Weed out forks or non-matching entries of search
4759                 if ($check_forks) {
4760                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4761                         $forkbase="^$forkbase" if $forkbase;
4762                         next if not $searchtext and not $tagfilter and $show_ctags
4763                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4764                 }
4765
4766                 if ($alternate) {
4767                         print "<tr class=\"dark\">\n";
4768                 } else {
4769                         print "<tr class=\"light\">\n";
4770                 }
4771                 $alternate ^= 1;
4772                 if ($check_forks) {
4773                         print "<td>";
4774                         if ($pr->{'forks'}) {
4775                                 print "<!-- $pr->{'forks'} -->\n";
4776                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4777                         }
4778                         print "</td>\n";
4779                 }
4780                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4781                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4782                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4783                                         -class => "list", -title => $pr->{'descr_long'}},
4784                                         esc_html($pr->{'descr'})) . "</td>\n" .
4785                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4786                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4787                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4788                       "<td class=\"link\">" .
4789                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4790                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4791                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4792                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4793                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4794                       "</td>\n" .
4795                       "</tr>\n";
4796         }
4797         if (defined $extra) {
4798                 print "<tr>\n";
4799                 if ($check_forks) {
4800                         print "<td></td>\n";
4801                 }
4802                 print "<td colspan=\"5\">$extra</td>\n" .
4803                       "</tr>\n";
4804         }
4805         print "</table>\n";
4806 }
4807
4808 sub git_log_body {
4809         # uses global variable $project
4810         my ($commitlist, $from, $to, $refs, $extra) = @_;
4811
4812         $from = 0 unless defined $from;
4813         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4814
4815         for (my $i = 0; $i <= $to; $i++) {
4816                 my %co = %{$commitlist->[$i]};
4817                 next if !%co;
4818                 my $commit = $co{'id'};
4819                 my $ref = format_ref_marker($refs, $commit);
4820                 my %ad = parse_date($co{'author_epoch'});
4821                 git_print_header_div('commit',
4822                                "<span class=\"age\">$co{'age_string'}</span>" .
4823                                esc_html($co{'title'}) . $ref,
4824                                $commit);
4825                 print "<div class=\"title_text\">\n" .
4826                       "<div class=\"log_link\">\n" .
4827                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4828                       " | " .
4829                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4830                       " | " .
4831                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4832                       "<br/>\n" .
4833                       "</div>\n";
4834                       git_print_authorship(\%co, -tag => 'span');
4835                       print "<br/>\n</div>\n";
4836
4837                 print "<div class=\"log_body\">\n";
4838                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4839                 print "</div>\n";
4840         }
4841         if ($extra) {
4842                 print "<div class=\"page_nav\">\n";
4843                 print "$extra\n";
4844                 print "</div>\n";
4845         }
4846 }
4847
4848 sub git_shortlog_body {
4849         # uses global variable $project
4850         my ($commitlist, $from, $to, $refs, $extra) = @_;
4851
4852         $from = 0 unless defined $from;
4853         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4854
4855         print "<table class=\"shortlog\">\n";
4856         my $alternate = 1;
4857         for (my $i = $from; $i <= $to; $i++) {
4858                 my %co = %{$commitlist->[$i]};
4859                 my $commit = $co{'id'};
4860                 my $ref = format_ref_marker($refs, $commit);
4861                 if ($alternate) {
4862                         print "<tr class=\"dark\">\n";
4863                 } else {
4864                         print "<tr class=\"light\">\n";
4865                 }
4866                 $alternate ^= 1;
4867                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4868                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4869                       format_author_html('td', \%co, 10) . "<td>";
4870                 print format_subject_html($co{'title'}, $co{'title_short'},
4871                                           href(action=>"commit", hash=>$commit), $ref);
4872                 print "</td>\n" .
4873                       "<td class=\"link\">" .
4874                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4875                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4876                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4877                 my $snapshot_links = format_snapshot_links($commit);
4878                 if (defined $snapshot_links) {
4879                         print " | " . $snapshot_links;
4880                 }
4881                 print "</td>\n" .
4882                       "</tr>\n";
4883         }
4884         if (defined $extra) {
4885                 print "<tr>\n" .
4886                       "<td colspan=\"4\">$extra</td>\n" .
4887                       "</tr>\n";
4888         }
4889         print "</table>\n";
4890 }
4891
4892 sub git_history_body {
4893         # Warning: assumes constant type (blob or tree) during history
4894         my ($commitlist, $from, $to, $refs, $extra,
4895             $file_name, $file_hash, $ftype) = @_;
4896
4897         $from = 0 unless defined $from;
4898         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4899
4900         print "<table class=\"history\">\n";
4901         my $alternate = 1;
4902         for (my $i = $from; $i <= $to; $i++) {
4903                 my %co = %{$commitlist->[$i]};
4904                 if (!%co) {
4905                         next;
4906                 }
4907                 my $commit = $co{'id'};
4908
4909                 my $ref = format_ref_marker($refs, $commit);
4910
4911                 if ($alternate) {
4912                         print "<tr class=\"dark\">\n";
4913                 } else {
4914                         print "<tr class=\"light\">\n";
4915                 }
4916                 $alternate ^= 1;
4917                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4918         # shortlog:   format_author_html('td', \%co, 10)
4919                       format_author_html('td', \%co, 15, 3) . "<td>";
4920                 # originally git_history used chop_str($co{'title'}, 50)
4921                 print format_subject_html($co{'title'}, $co{'title_short'},
4922                                           href(action=>"commit", hash=>$commit), $ref);
4923                 print "</td>\n" .
4924                       "<td class=\"link\">" .
4925                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4926                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4927
4928                 if ($ftype eq 'blob') {
4929                         my $blob_current = $file_hash;
4930                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4931                         if (defined $blob_current && defined $blob_parent &&
4932                                         $blob_current ne $blob_parent) {
4933                                 print " | " .
4934                                         $cgi->a({-href => href(action=>"blobdiff",
4935                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4936                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4937                                                                file_name=>$file_name)},
4938                                                 "diff to current");
4939                         }
4940                 }
4941                 print "</td>\n" .
4942                       "</tr>\n";
4943         }
4944         if (defined $extra) {
4945                 print "<tr>\n" .
4946                       "<td colspan=\"4\">$extra</td>\n" .
4947                       "</tr>\n";
4948         }
4949         print "</table>\n";
4950 }
4951
4952 sub git_tags_body {
4953         # uses global variable $project
4954         my ($taglist, $from, $to, $extra) = @_;
4955         $from = 0 unless defined $from;
4956         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4957
4958         print "<table class=\"tags\">\n";
4959         my $alternate = 1;
4960         for (my $i = $from; $i <= $to; $i++) {
4961                 my $entry = $taglist->[$i];
4962                 my %tag = %$entry;
4963                 my $comment = $tag{'subject'};
4964                 my $comment_short;
4965                 if (defined $comment) {
4966                         $comment_short = chop_str($comment, 30, 5);
4967                 }
4968                 if ($alternate) {
4969                         print "<tr class=\"dark\">\n";
4970                 } else {
4971                         print "<tr class=\"light\">\n";
4972                 }
4973                 $alternate ^= 1;
4974                 if (defined $tag{'age'}) {
4975                         print "<td><i>$tag{'age'}</i></td>\n";
4976                 } else {
4977                         print "<td></td>\n";
4978                 }
4979                 print "<td>" .
4980                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4981                                -class => "list name"}, esc_html($tag{'name'})) .
4982                       "</td>\n" .
4983                       "<td>";
4984                 if (defined $comment) {
4985                         print format_subject_html($comment, $comment_short,
4986                                                   href(action=>"tag", hash=>$tag{'id'}));
4987                 }
4988                 print "</td>\n" .
4989                       "<td class=\"selflink\">";
4990                 if ($tag{'type'} eq "tag") {
4991                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4992                 } else {
4993                         print "&nbsp;";
4994                 }
4995                 print "</td>\n" .
4996                       "<td class=\"link\">" . " | " .
4997                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4998                 if ($tag{'reftype'} eq "commit") {
4999                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5000                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5001                 } elsif ($tag{'reftype'} eq "blob") {
5002                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5003                 }
5004                 print "</td>\n" .
5005                       "</tr>";
5006         }
5007         if (defined $extra) {
5008                 print "<tr>\n" .
5009                       "<td colspan=\"5\">$extra</td>\n" .
5010                       "</tr>\n";
5011         }
5012         print "</table>\n";
5013 }
5014
5015 sub git_heads_body {
5016         # uses global variable $project
5017         my ($headlist, $head, $from, $to, $extra) = @_;
5018         $from = 0 unless defined $from;
5019         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5020
5021         print "<table class=\"heads\">\n";
5022         my $alternate = 1;
5023         for (my $i = $from; $i <= $to; $i++) {
5024                 my $entry = $headlist->[$i];
5025                 my %ref = %$entry;
5026                 my $curr = $ref{'id'} eq $head;
5027                 if ($alternate) {
5028                         print "<tr class=\"dark\">\n";
5029                 } else {
5030                         print "<tr class=\"light\">\n";
5031                 }
5032                 $alternate ^= 1;
5033                 print "<td><i>$ref{'age'}</i></td>\n" .
5034                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5035                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5036                                -class => "list name"},esc_html($ref{'name'})) .
5037                       "</td>\n" .
5038                       "<td class=\"link\">" .
5039                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5040                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5041                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5042                       "</td>\n" .
5043                       "</tr>";
5044         }
5045         if (defined $extra) {
5046                 print "<tr>\n" .
5047                       "<td colspan=\"3\">$extra</td>\n" .
5048                       "</tr>\n";
5049         }
5050         print "</table>\n";
5051 }
5052
5053 sub git_search_grep_body {
5054         my ($commitlist, $from, $to, $extra) = @_;
5055         $from = 0 unless defined $from;
5056         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5057
5058         print "<table class=\"commit_search\">\n";
5059         my $alternate = 1;
5060         for (my $i = $from; $i <= $to; $i++) {
5061                 my %co = %{$commitlist->[$i]};
5062                 if (!%co) {
5063                         next;
5064                 }
5065                 my $commit = $co{'id'};
5066                 if ($alternate) {
5067                         print "<tr class=\"dark\">\n";
5068                 } else {
5069                         print "<tr class=\"light\">\n";
5070                 }
5071                 $alternate ^= 1;
5072                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5073                       format_author_html('td', \%co, 15, 5) .
5074                       "<td>" .
5075                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5076                                -class => "list subject"},
5077                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5078                 my $comment = $co{'comment'};
5079                 foreach my $line (@$comment) {
5080                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5081                                 my ($lead, $match, $trail) = ($1, $2, $3);
5082                                 $match = chop_str($match, 70, 5, 'center');
5083                                 my $contextlen = int((80 - length($match))/2);
5084                                 $contextlen = 30 if ($contextlen > 30);
5085                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5086                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5087
5088                                 $lead  = esc_html($lead);
5089                                 $match = esc_html($match);
5090                                 $trail = esc_html($trail);
5091
5092                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5093                         }
5094                 }
5095                 print "</td>\n" .
5096                       "<td class=\"link\">" .
5097                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5098                       " | " .
5099                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5100                       " | " .
5101                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5102                 print "</td>\n" .
5103                       "</tr>\n";
5104         }
5105         if (defined $extra) {
5106                 print "<tr>\n" .
5107                       "<td colspan=\"3\">$extra</td>\n" .
5108                       "</tr>\n";
5109         }
5110         print "</table>\n";
5111 }
5112
5113 ## ======================================================================
5114 ## ======================================================================
5115 ## actions
5116
5117 sub git_project_list {
5118         my $order = $input_params{'order'};
5119         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5120                 die_error(400, "Unknown order parameter");
5121         }
5122
5123         my @list = git_get_projects_list();
5124         if (!@list) {
5125                 die_error(404, "No projects found");
5126         }
5127
5128         git_header_html();
5129         if (defined $home_text && -f $home_text) {
5130                 print "<div class=\"index_include\">\n";
5131                 insert_file($home_text);
5132                 print "</div>\n";
5133         }
5134         print $cgi->startform(-method => "get") .
5135               "<p class=\"projsearch\">Search:\n" .
5136               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5137               "</p>" .
5138               $cgi->end_form() . "\n";
5139         git_project_list_body(\@list, $order);
5140         git_footer_html();
5141 }
5142
5143 sub git_forks {
5144         my $order = $input_params{'order'};
5145         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5146                 die_error(400, "Unknown order parameter");
5147         }
5148
5149         my @list = git_get_projects_list($project);
5150         if (!@list) {
5151                 die_error(404, "No forks found");
5152         }
5153
5154         git_header_html();
5155         git_print_page_nav('','');
5156         git_print_header_div('summary', "$project forks");
5157         git_project_list_body(\@list, $order);
5158         git_footer_html();
5159 }
5160
5161 sub git_project_index {
5162         my @projects = git_get_projects_list($project);
5163
5164         print $cgi->header(
5165                 -type => 'text/plain',
5166                 -charset => 'utf-8',
5167                 -content_disposition => 'inline; filename="index.aux"');
5168
5169         foreach my $pr (@projects) {
5170                 if (!exists $pr->{'owner'}) {
5171                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5172                 }
5173
5174                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5175                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5176                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5177                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5178                 $path  =~ s/ /\+/g;
5179                 $owner =~ s/ /\+/g;
5180
5181                 print "$path $owner\n";
5182         }
5183 }
5184
5185 sub git_summary {
5186         my $descr = git_get_project_description($project) || "none";
5187         my %co = parse_commit("HEAD");
5188         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5189         my $head = $co{'id'};
5190         my $remote_heads = gitweb_check_feature('remote_heads');
5191
5192         my $owner = git_get_project_owner($project);
5193
5194         my $refs = git_get_references();
5195         # These get_*_list functions return one more to allow us to see if
5196         # there are more ...
5197         my @taglist  = git_get_tags_list(16);
5198         my @headlist = git_get_heads_list(16);
5199         my @remotelist = $remote_heads ? git_get_heads_list(16, 'remotes') : ();
5200         my @forklist;
5201         my $check_forks = gitweb_check_feature('forks');
5202
5203         if ($check_forks) {
5204                 @forklist = git_get_projects_list($project);
5205         }
5206
5207         git_header_html();
5208         git_print_page_nav('summary','', $head);
5209
5210         print "<div class=\"title\">&nbsp;</div>\n";
5211         print "<table class=\"projects_list\">\n" .
5212               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5213               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5214         if (defined $cd{'rfc2822'}) {
5215                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5216         }
5217
5218         # use per project git URL list in $projectroot/$project/cloneurl
5219         # or make project git URL from git base URL and project name
5220         my $url_tag = "URL";
5221         my @url_list = git_get_project_url_list($project);
5222         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5223         foreach my $git_url (@url_list) {
5224                 next unless $git_url;
5225                 print format_repo_url($url_tag, $git_url);
5226                 $url_tag = "";
5227         }
5228
5229         # Tag cloud
5230         my $show_ctags = gitweb_check_feature('ctags');
5231         if ($show_ctags) {
5232                 my $ctags = git_get_project_ctags($project);
5233                 my $cloud = git_populate_project_tagcloud($ctags);
5234                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5235                 print "</td>\n<td>" unless %$ctags;
5236                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5237                 print "</td>\n<td>" if %$ctags;
5238                 print git_show_project_tagcloud($cloud, 48);
5239                 print "</td></tr>";
5240         }
5241
5242         print "</table>\n";
5243
5244         # If XSS prevention is on, we don't include README.html.
5245         # TODO: Allow a readme in some safe format.
5246         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5247                 print "<div class=\"title\">readme</div>\n" .
5248                       "<div class=\"readme\">\n";
5249                 insert_file("$projectroot/$project/README.html");
5250                 print "\n</div>\n"; # class="readme"
5251         }
5252
5253         # we need to request one more than 16 (0..15) to check if
5254         # those 16 are all
5255         my @commitlist = $head ? parse_commits($head, 17) : ();
5256         if (@commitlist) {
5257                 git_print_header_div('shortlog');
5258                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5259                                   $#commitlist <=  15 ? undef :
5260                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5261         }
5262
5263         if (@taglist) {
5264                 git_print_header_div('tags');
5265                 git_tags_body(\@taglist, 0, 15,
5266                               $#taglist <=  15 ? undef :
5267                               $cgi->a({-href => href(action=>"tags")}, "..."));
5268         }
5269
5270         if (@headlist) {
5271                 git_print_header_div('heads');
5272                 git_heads_body(\@headlist, $head, 0, 15,
5273                                $#headlist <= 15 ? undef :
5274                                $cgi->a({-href => href(action=>"heads")}, "..."));
5275         }
5276
5277         if (@remotelist) {
5278                 git_print_header_div('remotes');
5279                 git_heads_body(\@remotelist, $head, 0, 15,
5280                                $#remotelist <= 15 ? undef :
5281                                $cgi->a({-href => href(action=>"remotes")}, "..."));
5282         }
5283
5284         if (@forklist) {
5285                 git_print_header_div('forks');
5286                 git_project_list_body(\@forklist, 'age', 0, 15,
5287                                       $#forklist <= 15 ? undef :
5288                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5289                                       'no_header');
5290         }
5291
5292         git_footer_html();
5293 }
5294
5295 sub git_tag {
5296         my %tag = parse_tag($hash);
5297
5298         if (! %tag) {
5299                 die_error(404, "Unknown tag object");
5300         }
5301
5302         my $head = git_get_head_hash($project);
5303         git_header_html();
5304         git_print_page_nav('','', $head,undef,$head);
5305         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5306         print "<div class=\"title_text\">\n" .
5307               "<table class=\"object_header\">\n" .
5308               "<tr>\n" .
5309               "<td>object</td>\n" .
5310               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5311                                $tag{'object'}) . "</td>\n" .
5312               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5313                                               $tag{'type'}) . "</td>\n" .
5314               "</tr>\n";
5315         if (defined($tag{'author'})) {
5316                 git_print_authorship_rows(\%tag, 'author');
5317         }
5318         print "</table>\n\n" .
5319               "</div>\n";
5320         print "<div class=\"page_body\">";
5321         my $comment = $tag{'comment'};
5322         foreach my $line (@$comment) {
5323                 chomp $line;
5324                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5325         }
5326         print "</div>\n";
5327         git_footer_html();
5328 }
5329
5330 sub git_blame_common {
5331         my $format = shift || 'porcelain';
5332         if ($format eq 'porcelain' && $cgi->param('js')) {
5333                 $format = 'incremental';
5334                 $action = 'blame_incremental'; # for page title etc
5335         }
5336
5337         # permissions
5338         gitweb_check_feature('blame')
5339                 or die_error(403, "Blame view not allowed");
5340
5341         # error checking
5342         die_error(400, "No file name given") unless $file_name;
5343         $hash_base ||= git_get_head_hash($project);
5344         die_error(404, "Couldn't find base commit") unless $hash_base;
5345         my %co = parse_commit($hash_base)
5346                 or die_error(404, "Commit not found");
5347         my $ftype = "blob";
5348         if (!defined $hash) {
5349                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5350                         or die_error(404, "Error looking up file");
5351         } else {
5352                 $ftype = git_get_type($hash);
5353                 if ($ftype !~ "blob") {
5354                         die_error(400, "Object is not a blob");
5355                 }
5356         }
5357
5358         my $fd;
5359         if ($format eq 'incremental') {
5360                 # get file contents (as base)
5361                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5362                         or die_error(500, "Open git-cat-file failed");
5363         } elsif ($format eq 'data') {
5364                 # run git-blame --incremental
5365                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5366                         $hash_base, "--", $file_name
5367                         or die_error(500, "Open git-blame --incremental failed");
5368         } else {
5369                 # run git-blame --porcelain
5370                 open $fd, "-|", git_cmd(), "blame", '-p',
5371                         $hash_base, '--', $file_name
5372                         or die_error(500, "Open git-blame --porcelain failed");
5373         }
5374
5375         # incremental blame data returns early
5376         if ($format eq 'data') {
5377                 print $cgi->header(
5378                         -type=>"text/plain", -charset => "utf-8",
5379                         -status=> "200 OK");
5380                 local $| = 1; # output autoflush
5381                 print while <$fd>;
5382                 close $fd
5383                         or print "ERROR $!\n";
5384
5385                 print 'END';
5386                 if (defined $t0 && gitweb_check_feature('timed')) {
5387                         print ' '.
5388                               tv_interval($t0, [ gettimeofday() ]).
5389                               ' '.$number_of_git_cmds;
5390                 }
5391                 print "\n";
5392
5393                 return;
5394         }
5395
5396         # page header
5397         git_header_html();
5398         my $formats_nav =
5399                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5400                         "blob") .
5401                 " | ";
5402         if ($format eq 'incremental') {
5403                 $formats_nav .=
5404                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5405                                 "blame") . " (non-incremental)";
5406         } else {
5407                 $formats_nav .=
5408                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5409                                 "blame") . " (incremental)";
5410         }
5411         $formats_nav .=
5412                 " | " .
5413                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5414                         "history") .
5415                 " | " .
5416                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5417                         "HEAD");
5418         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5419         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5420         git_print_page_path($file_name, $ftype, $hash_base);
5421
5422         # page body
5423         if ($format eq 'incremental') {
5424                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5425                       "This page requires JavaScript to run.\n Use ".
5426                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5427                               'this page').
5428                       " instead.\n".
5429                       "</b></center></div>\n</noscript>\n";
5430
5431                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5432         }
5433
5434         print qq!<div class="page_body">\n!;
5435         print qq!<div id="progress_info">... / ...</div>\n!
5436                 if ($format eq 'incremental');
5437         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5438               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5439               qq!<thead>\n!.
5440               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5441               qq!</thead>\n!.
5442               qq!<tbody>\n!;
5443
5444         my @rev_color = qw(light dark);
5445         my $num_colors = scalar(@rev_color);
5446         my $current_color = 0;
5447
5448         if ($format eq 'incremental') {
5449                 my $color_class = $rev_color[$current_color];
5450
5451                 #contents of a file
5452                 my $linenr = 0;
5453         LINE:
5454                 while (my $line = <$fd>) {
5455                         chomp $line;
5456                         $linenr++;
5457
5458                         print qq!<tr id="l$linenr" class="$color_class">!.
5459                               qq!<td class="sha1"><a href=""> </a></td>!.
5460                               qq!<td class="linenr">!.
5461                               qq!<a class="linenr" href="">$linenr</a></td>!;
5462                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5463                         print qq!</tr>\n!;
5464                 }
5465
5466         } else { # porcelain, i.e. ordinary blame
5467                 my %metainfo = (); # saves information about commits
5468
5469                 # blame data
5470         LINE:
5471                 while (my $line = <$fd>) {
5472                         chomp $line;
5473                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5474                         # no <lines in group> for subsequent lines in group of lines
5475                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5476                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5477                         if (!exists $metainfo{$full_rev}) {
5478                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5479                         }
5480                         my $meta = $metainfo{$full_rev};
5481                         my $data;
5482                         while ($data = <$fd>) {
5483                                 chomp $data;
5484                                 last if ($data =~ s/^\t//); # contents of line
5485                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5486                                         $meta->{$1} = $2 unless exists $meta->{$1};
5487                                 }
5488                                 if ($data =~ /^previous /) {
5489                                         $meta->{'nprevious'}++;
5490                                 }
5491                         }
5492                         my $short_rev = substr($full_rev, 0, 8);
5493                         my $author = $meta->{'author'};
5494                         my %date =
5495                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5496                         my $date = $date{'iso-tz'};
5497                         if ($group_size) {
5498                                 $current_color = ($current_color + 1) % $num_colors;
5499                         }
5500                         my $tr_class = $rev_color[$current_color];
5501                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5502                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5503                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5504                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5505                         if ($group_size) {
5506                                 print "<td class=\"sha1\"";
5507                                 print " title=\"". esc_html($author) . ", $date\"";
5508                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5509                                 print ">";
5510                                 print $cgi->a({-href => href(action=>"commit",
5511                                                              hash=>$full_rev,
5512                                                              file_name=>$file_name)},
5513                                               esc_html($short_rev));
5514                                 if ($group_size >= 2) {
5515                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5516                                         if (@author_initials) {
5517                                                 print "<br />" .
5518                                                       esc_html(join('', @author_initials));
5519                                                 #           or join('.', ...)
5520                                         }
5521                                 }
5522                                 print "</td>\n";
5523                         }
5524                         # 'previous' <sha1 of parent commit> <filename at commit>
5525                         if (exists $meta->{'previous'} &&
5526                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5527                                 $meta->{'parent'} = $1;
5528                                 $meta->{'file_parent'} = unquote($2);
5529                         }
5530                         my $linenr_commit =
5531                                 exists($meta->{'parent'}) ?
5532                                 $meta->{'parent'} : $full_rev;
5533                         my $linenr_filename =
5534                                 exists($meta->{'file_parent'}) ?
5535                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5536                         my $blamed = href(action => 'blame',
5537                                           file_name => $linenr_filename,
5538                                           hash_base => $linenr_commit);
5539                         print "<td class=\"linenr\">";
5540                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5541                                         -class => "linenr" },
5542                                       esc_html($lineno));
5543                         print "</td>";
5544                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5545                         print "</tr>\n";
5546                 } # end while
5547
5548         }
5549
5550         # footer
5551         print "</tbody>\n".
5552               "</table>\n"; # class="blame"
5553         print "</div>\n";   # class="blame_body"
5554         close $fd
5555                 or print "Reading blob failed\n";
5556
5557         git_footer_html();
5558 }
5559
5560 sub git_blame {
5561         git_blame_common();
5562 }
5563
5564 sub git_blame_incremental {
5565         git_blame_common('incremental');
5566 }
5567
5568 sub git_blame_data {
5569         git_blame_common('data');
5570 }
5571
5572 sub git_tags {
5573         my $head = git_get_head_hash($project);
5574         git_header_html();
5575         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5576         git_print_header_div('summary', $project);
5577
5578         my @tagslist = git_get_tags_list();
5579         if (@tagslist) {
5580                 git_tags_body(\@tagslist);
5581         }
5582         git_footer_html();
5583 }
5584
5585 sub git_heads {
5586         my $head = git_get_head_hash($project);
5587         git_header_html();
5588         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5589         git_print_header_div('summary', $project);
5590
5591         my @headslist = git_get_heads_list();
5592         if (@headslist) {
5593                 git_heads_body(\@headslist, $head);
5594         }
5595         git_footer_html();
5596 }
5597
5598 sub git_remotes {
5599         gitweb_check_feature('remote_heads')
5600                 or die_error(403, "Remote heads view is disabled");
5601
5602         my $head = git_get_head_hash($project);
5603         my $remote = $input_params{'hash'};
5604
5605         my @remotelist;
5606
5607         if (defined $remote) {
5608                 # only display the heads in a given remote, stripping the
5609                 # remote name which is already visible elsewhere
5610                 @remotelist = map {
5611                         my $ref = $_ ;
5612                         $ref->{'name'} =~ s!^$remote/!!;
5613                         $ref
5614                 } git_get_heads_list(undef, "remotes/$remote");
5615         } else {
5616                 @remotelist = git_get_heads_list(undef, 'remotes');
5617         }
5618
5619         git_header_html(undef, undef, -action_extra => $remote);
5620         git_print_page_nav('', '',  $head, undef, $head,
5621                 format_ref_views($remote ? '' : 'remotes'));
5622
5623         if (defined $remote) {
5624                 git_print_header_div('remotes', "$remote remote for $project");
5625         } else {
5626                 git_print_header_div('summary', "$project remotes");
5627         }
5628
5629         if (@remotelist) {
5630                 git_heads_body(\@remotelist, $head);
5631         }
5632
5633         git_footer_html();
5634 }
5635
5636 sub git_blob_plain {
5637         my $type = shift;
5638         my $expires;
5639
5640         if (!defined $hash) {
5641                 if (defined $file_name) {
5642                         my $base = $hash_base || git_get_head_hash($project);
5643                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5644                                 or die_error(404, "Cannot find file");
5645                 } else {
5646                         die_error(400, "No file name defined");
5647                 }
5648         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5649                 # blobs defined by non-textual hash id's can be cached
5650                 $expires = "+1d";
5651         }
5652
5653         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5654                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5655
5656         # content-type (can include charset)
5657         $type = blob_contenttype($fd, $file_name, $type);
5658
5659         # "save as" filename, even when no $file_name is given
5660         my $save_as = "$hash";
5661         if (defined $file_name) {
5662                 $save_as = $file_name;
5663         } elsif ($type =~ m/^text\//) {
5664                 $save_as .= '.txt';
5665         }
5666
5667         # With XSS prevention on, blobs of all types except a few known safe
5668         # ones are served with "Content-Disposition: attachment" to make sure
5669         # they don't run in our security domain.  For certain image types,
5670         # blob view writes an <img> tag referring to blob_plain view, and we
5671         # want to be sure not to break that by serving the image as an
5672         # attachment (though Firefox 3 doesn't seem to care).
5673         my $sandbox = $prevent_xss &&
5674                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5675
5676         print $cgi->header(
5677                 -type => $type,
5678                 -expires => $expires,
5679                 -content_disposition =>
5680                         ($sandbox ? 'attachment' : 'inline')
5681                         . '; filename="' . $save_as . '"');
5682         local $/ = undef;
5683         binmode STDOUT, ':raw';
5684         print <$fd>;
5685         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5686         close $fd;
5687 }
5688
5689 sub git_blob {
5690         my $expires;
5691
5692         if (!defined $hash) {
5693                 if (defined $file_name) {
5694                         my $base = $hash_base || git_get_head_hash($project);
5695                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5696                                 or die_error(404, "Cannot find file");
5697                 } else {
5698                         die_error(400, "No file name defined");
5699                 }
5700         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5701                 # blobs defined by non-textual hash id's can be cached
5702                 $expires = "+1d";
5703         }
5704
5705         my $have_blame = gitweb_check_feature('blame');
5706         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5707                 or die_error(500, "Couldn't cat $file_name, $hash");
5708         my $mimetype = blob_mimetype($fd, $file_name);
5709         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5710         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5711                 close $fd;
5712                 return git_blob_plain($mimetype);
5713         }
5714         # we can have blame only for text/* mimetype
5715         $have_blame &&= ($mimetype =~ m!^text/!);
5716
5717         my $highlight = gitweb_check_feature('highlight');
5718         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5719         $fd = run_highlighter($fd, $highlight, $syntax)
5720                 if $syntax;
5721
5722         git_header_html(undef, $expires);
5723         my $formats_nav = '';
5724         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5725                 if (defined $file_name) {
5726                         if ($have_blame) {
5727                                 $formats_nav .=
5728                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5729                                                 "blame") .
5730                                         " | ";
5731                         }
5732                         $formats_nav .=
5733                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5734                                         "history") .
5735                                 " | " .
5736                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5737                                         "raw") .
5738                                 " | " .
5739                                 $cgi->a({-href => href(action=>"blob",
5740                                                        hash_base=>"HEAD", file_name=>$file_name)},
5741                                         "HEAD");
5742                 } else {
5743                         $formats_nav .=
5744                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5745                                         "raw");
5746                 }
5747                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5748                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5749         } else {
5750                 print "<div class=\"page_nav\">\n" .
5751                       "<br/><br/></div>\n" .
5752                       "<div class=\"title\">$hash</div>\n";
5753         }
5754         git_print_page_path($file_name, "blob", $hash_base);
5755         print "<div class=\"page_body\">\n";
5756         if ($mimetype =~ m!^image/!) {
5757                 print qq!<img type="$mimetype"!;
5758                 if ($file_name) {
5759                         print qq! alt="$file_name" title="$file_name"!;
5760                 }
5761                 print qq! src="! .
5762                       href(action=>"blob_plain", hash=>$hash,
5763                            hash_base=>$hash_base, file_name=>$file_name) .
5764                       qq!" />\n!;
5765         } else {
5766                 my $nr;
5767                 while (my $line = <$fd>) {
5768                         chomp $line;
5769                         $nr++;
5770                         $line = untabify($line);
5771                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5772                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5773                 }
5774         }
5775         close $fd
5776                 or print "Reading blob failed.\n";
5777         print "</div>";
5778         git_footer_html();
5779 }
5780
5781 sub git_tree {
5782         if (!defined $hash_base) {
5783                 $hash_base = "HEAD";
5784         }
5785         if (!defined $hash) {
5786                 if (defined $file_name) {
5787                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5788                 } else {
5789                         $hash = $hash_base;
5790                 }
5791         }
5792         die_error(404, "No such tree") unless defined($hash);
5793
5794         my $show_sizes = gitweb_check_feature('show-sizes');
5795         my $have_blame = gitweb_check_feature('blame');
5796
5797         my @entries = ();
5798         {
5799                 local $/ = "\0";
5800                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5801                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5802                         or die_error(500, "Open git-ls-tree failed");
5803                 @entries = map { chomp; $_ } <$fd>;
5804                 close $fd
5805                         or die_error(404, "Reading tree failed");
5806         }
5807
5808         my $refs = git_get_references();
5809         my $ref = format_ref_marker($refs, $hash_base);
5810         git_header_html();
5811         my $basedir = '';
5812         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5813                 my @views_nav = ();
5814                 if (defined $file_name) {
5815                         push @views_nav,
5816                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5817                                         "history"),
5818                                 $cgi->a({-href => href(action=>"tree",
5819                                                        hash_base=>"HEAD", file_name=>$file_name)},
5820                                         "HEAD"),
5821                 }
5822                 my $snapshot_links = format_snapshot_links($hash);
5823                 if (defined $snapshot_links) {
5824                         # FIXME: Should be available when we have no hash base as well.
5825                         push @views_nav, $snapshot_links;
5826                 }
5827                 git_print_page_nav('tree','', $hash_base, undef, undef,
5828                                    join(' | ', @views_nav));
5829                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5830         } else {
5831                 undef $hash_base;
5832                 print "<div class=\"page_nav\">\n";
5833                 print "<br/><br/></div>\n";
5834                 print "<div class=\"title\">$hash</div>\n";
5835         }
5836         if (defined $file_name) {
5837                 $basedir = $file_name;
5838                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5839                         $basedir .= '/';
5840                 }
5841                 git_print_page_path($file_name, 'tree', $hash_base);
5842         }
5843         print "<div class=\"page_body\">\n";
5844         print "<table class=\"tree\">\n";
5845         my $alternate = 1;
5846         # '..' (top directory) link if possible
5847         if (defined $hash_base &&
5848             defined $file_name && $file_name =~ m![^/]+$!) {
5849                 if ($alternate) {
5850                         print "<tr class=\"dark\">\n";
5851                 } else {
5852                         print "<tr class=\"light\">\n";
5853                 }
5854                 $alternate ^= 1;
5855
5856                 my $up = $file_name;
5857                 $up =~ s!/?[^/]+$!!;
5858                 undef $up unless $up;
5859                 # based on git_print_tree_entry
5860                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5861                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5862                 print '<td class="list">';
5863                 print $cgi->a({-href => href(action=>"tree",
5864                                              hash_base=>$hash_base,
5865                                              file_name=>$up)},
5866                               "..");
5867                 print "</td>\n";
5868                 print "<td class=\"link\"></td>\n";
5869
5870                 print "</tr>\n";
5871         }
5872         foreach my $line (@entries) {
5873                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5874
5875                 if ($alternate) {
5876                         print "<tr class=\"dark\">\n";
5877                 } else {
5878                         print "<tr class=\"light\">\n";
5879                 }
5880                 $alternate ^= 1;
5881
5882                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5883
5884                 print "</tr>\n";
5885         }
5886         print "</table>\n" .
5887               "</div>";
5888         git_footer_html();
5889 }
5890
5891 sub snapshot_name {
5892         my ($project, $hash) = @_;
5893
5894         # path/to/project.git  -> project
5895         # path/to/project/.git -> project
5896         my $name = to_utf8($project);
5897         $name =~ s,([^/])/*\.git$,$1,;
5898         $name = basename($name);
5899         # sanitize name
5900         $name =~ s/[[:cntrl:]]/?/g;
5901
5902         my $ver = $hash;
5903         if ($hash =~ /^[0-9a-fA-F]+$/) {
5904                 # shorten SHA-1 hash
5905                 my $full_hash = git_get_full_hash($project, $hash);
5906                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5907                         $ver = git_get_short_hash($project, $hash);
5908                 }
5909         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5910                 # tags don't need shortened SHA-1 hash
5911                 $ver = $1;
5912         } else {
5913                 # branches and other need shortened SHA-1 hash
5914                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5915                         $ver = $1;
5916                 }
5917                 $ver .= '-' . git_get_short_hash($project, $hash);
5918         }
5919         # in case of hierarchical branch names
5920         $ver =~ s!/!.!g;
5921
5922         # name = project-version_string
5923         $name = "$name-$ver";
5924
5925         return wantarray ? ($name, $name) : $name;
5926 }
5927
5928 sub git_snapshot {
5929         my $format = $input_params{'snapshot_format'};
5930         if (!@snapshot_fmts) {
5931                 die_error(403, "Snapshots not allowed");
5932         }
5933         # default to first supported snapshot format
5934         $format ||= $snapshot_fmts[0];
5935         if ($format !~ m/^[a-z0-9]+$/) {
5936                 die_error(400, "Invalid snapshot format parameter");
5937         } elsif (!exists($known_snapshot_formats{$format})) {
5938                 die_error(400, "Unknown snapshot format");
5939         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5940                 die_error(403, "Snapshot format not allowed");
5941         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5942                 die_error(403, "Unsupported snapshot format");
5943         }
5944
5945         my $type = git_get_type("$hash^{}");
5946         if (!$type) {
5947                 die_error(404, 'Object does not exist');
5948         }  elsif ($type eq 'blob') {
5949                 die_error(400, 'Object is not a tree-ish');
5950         }
5951
5952         my ($name, $prefix) = snapshot_name($project, $hash);
5953         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5954         my $cmd = quote_command(
5955                 git_cmd(), 'archive',
5956                 "--format=$known_snapshot_formats{$format}{'format'}",
5957                 "--prefix=$prefix/", $hash);
5958         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5959                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5960         }
5961
5962         $filename =~ s/(["\\])/\\$1/g;
5963         print $cgi->header(
5964                 -type => $known_snapshot_formats{$format}{'type'},
5965                 -content_disposition => 'inline; filename="' . $filename . '"',
5966                 -status => '200 OK');
5967
5968         open my $fd, "-|", $cmd
5969                 or die_error(500, "Execute git-archive failed");
5970         binmode STDOUT, ':raw';
5971         print <$fd>;
5972         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5973         close $fd;
5974 }
5975
5976 sub git_log_generic {
5977         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5978
5979         my $head = git_get_head_hash($project);
5980         if (!defined $base) {
5981                 $base = $head;
5982         }
5983         if (!defined $page) {
5984                 $page = 0;
5985         }
5986         my $refs = git_get_references();
5987
5988         my $commit_hash = $base;
5989         if (defined $parent) {
5990                 $commit_hash = "$parent..$base";
5991         }
5992         my @commitlist =
5993                 parse_commits($commit_hash, 101, (100 * $page),
5994                               defined $file_name ? ($file_name, "--full-history") : ());
5995
5996         my $ftype;
5997         if (!defined $file_hash && defined $file_name) {
5998                 # some commits could have deleted file in question,
5999                 # and not have it in tree, but one of them has to have it
6000                 for (my $i = 0; $i < @commitlist; $i++) {
6001                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6002                         last if defined $file_hash;
6003                 }
6004         }
6005         if (defined $file_hash) {
6006                 $ftype = git_get_type($file_hash);
6007         }
6008         if (defined $file_name && !defined $ftype) {
6009                 die_error(500, "Unknown type of object");
6010         }
6011         my %co;
6012         if (defined $file_name) {
6013                 %co = parse_commit($base)
6014                         or die_error(404, "Unknown commit object");
6015         }
6016
6017
6018         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6019         my $next_link = '';
6020         if ($#commitlist >= 100) {
6021                 $next_link =
6022                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6023                                  -accesskey => "n", -title => "Alt-n"}, "next");
6024         }
6025         my $patch_max = gitweb_get_feature('patches');
6026         if ($patch_max && !defined $file_name) {
6027                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6028                         $paging_nav .= " &sdot; " .
6029                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6030                                         "patches");
6031                 }
6032         }
6033
6034         git_header_html();
6035         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6036         if (defined $file_name) {
6037                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6038         } else {
6039                 git_print_header_div('summary', $project)
6040         }
6041         git_print_page_path($file_name, $ftype, $hash_base)
6042                 if (defined $file_name);
6043
6044         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6045                      $file_name, $file_hash, $ftype);
6046
6047         git_footer_html();
6048 }
6049
6050 sub git_log {
6051         git_log_generic('log', \&git_log_body,
6052                         $hash, $hash_parent);
6053 }
6054
6055 sub git_commit {
6056         $hash ||= $hash_base || "HEAD";
6057         my %co = parse_commit($hash)
6058             or die_error(404, "Unknown commit object");
6059
6060         my $parent  = $co{'parent'};
6061         my $parents = $co{'parents'}; # listref
6062
6063         # we need to prepare $formats_nav before any parameter munging
6064         my $formats_nav;
6065         if (!defined $parent) {
6066                 # --root commitdiff
6067                 $formats_nav .= '(initial)';
6068         } elsif (@$parents == 1) {
6069                 # single parent commit
6070                 $formats_nav .=
6071                         '(parent: ' .
6072                         $cgi->a({-href => href(action=>"commit",
6073                                                hash=>$parent)},
6074                                 esc_html(substr($parent, 0, 7))) .
6075                         ')';
6076         } else {
6077                 # merge commit
6078                 $formats_nav .=
6079                         '(merge: ' .
6080                         join(' ', map {
6081                                 $cgi->a({-href => href(action=>"commit",
6082                                                        hash=>$_)},
6083                                         esc_html(substr($_, 0, 7)));
6084                         } @$parents ) .
6085                         ')';
6086         }
6087         if (gitweb_check_feature('patches') && @$parents <= 1) {
6088                 $formats_nav .= " | " .
6089                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6090                                 "patch");
6091         }
6092
6093         if (!defined $parent) {
6094                 $parent = "--root";
6095         }
6096         my @difftree;
6097         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6098                 @diff_opts,
6099                 (@$parents <= 1 ? $parent : '-c'),
6100                 $hash, "--"
6101                 or die_error(500, "Open git-diff-tree failed");
6102         @difftree = map { chomp; $_ } <$fd>;
6103         close $fd or die_error(404, "Reading git-diff-tree failed");
6104
6105         # non-textual hash id's can be cached
6106         my $expires;
6107         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6108                 $expires = "+1d";
6109         }
6110         my $refs = git_get_references();
6111         my $ref = format_ref_marker($refs, $co{'id'});
6112
6113         git_header_html(undef, $expires);
6114         git_print_page_nav('commit', '',
6115                            $hash, $co{'tree'}, $hash,
6116                            $formats_nav);
6117
6118         if (defined $co{'parent'}) {
6119                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6120         } else {
6121                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6122         }
6123         print "<div class=\"title_text\">\n" .
6124               "<table class=\"object_header\">\n";
6125         git_print_authorship_rows(\%co);
6126         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6127         print "<tr>" .
6128               "<td>tree</td>" .
6129               "<td class=\"sha1\">" .
6130               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6131                        class => "list"}, $co{'tree'}) .
6132               "</td>" .
6133               "<td class=\"link\">" .
6134               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6135                       "tree");
6136         my $snapshot_links = format_snapshot_links($hash);
6137         if (defined $snapshot_links) {
6138                 print " | " . $snapshot_links;
6139         }
6140         print "</td>" .
6141               "</tr>\n";
6142
6143         foreach my $par (@$parents) {
6144                 print "<tr>" .
6145                       "<td>parent</td>" .
6146                       "<td class=\"sha1\">" .
6147                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6148                                class => "list"}, $par) .
6149                       "</td>" .
6150                       "<td class=\"link\">" .
6151                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6152                       " | " .
6153                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6154                       "</td>" .
6155                       "</tr>\n";
6156         }
6157         print "</table>".
6158               "</div>\n";
6159
6160         print "<div class=\"page_body\">\n";
6161         git_print_log($co{'comment'});
6162         print "</div>\n";
6163
6164         git_difftree_body(\@difftree, $hash, @$parents);
6165
6166         git_footer_html();
6167 }
6168
6169 sub git_object {
6170         # object is defined by:
6171         # - hash or hash_base alone
6172         # - hash_base and file_name
6173         my $type;
6174
6175         # - hash or hash_base alone
6176         if ($hash || ($hash_base && !defined $file_name)) {
6177                 my $object_id = $hash || $hash_base;
6178
6179                 open my $fd, "-|", quote_command(
6180                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6181                         or die_error(404, "Object does not exist");
6182                 $type = <$fd>;
6183                 chomp $type;
6184                 close $fd
6185                         or die_error(404, "Object does not exist");
6186
6187         # - hash_base and file_name
6188         } elsif ($hash_base && defined $file_name) {
6189                 $file_name =~ s,/+$,,;
6190
6191                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6192                         or die_error(404, "Base object does not exist");
6193
6194                 # here errors should not hapen
6195                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6196                         or die_error(500, "Open git-ls-tree failed");
6197                 my $line = <$fd>;
6198                 close $fd;
6199
6200                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6201                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6202                         die_error(404, "File or directory for given base does not exist");
6203                 }
6204                 $type = $2;
6205                 $hash = $3;
6206         } else {
6207                 die_error(400, "Not enough information to find object");
6208         }
6209
6210         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6211                                           hash=>$hash, hash_base=>$hash_base,
6212                                           file_name=>$file_name),
6213                              -status => '302 Found');
6214 }
6215
6216 sub git_blobdiff {
6217         my $format = shift || 'html';
6218
6219         my $fd;
6220         my @difftree;
6221         my %diffinfo;
6222         my $expires;
6223
6224         # preparing $fd and %diffinfo for git_patchset_body
6225         # new style URI
6226         if (defined $hash_base && defined $hash_parent_base) {
6227                 if (defined $file_name) {
6228                         # read raw output
6229                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6230                                 $hash_parent_base, $hash_base,
6231                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6232                                 or die_error(500, "Open git-diff-tree failed");
6233                         @difftree = map { chomp; $_ } <$fd>;
6234                         close $fd
6235                                 or die_error(404, "Reading git-diff-tree failed");
6236                         @difftree
6237                                 or die_error(404, "Blob diff not found");
6238
6239                 } elsif (defined $hash &&
6240                          $hash =~ /[0-9a-fA-F]{40}/) {
6241                         # try to find filename from $hash
6242
6243                         # read filtered raw output
6244                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6245                                 $hash_parent_base, $hash_base, "--"
6246                                 or die_error(500, "Open git-diff-tree failed");
6247                         @difftree =
6248                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6249                                 # $hash == to_id
6250                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6251                                 map { chomp; $_ } <$fd>;
6252                         close $fd
6253                                 or die_error(404, "Reading git-diff-tree failed");
6254                         @difftree
6255                                 or die_error(404, "Blob diff not found");
6256
6257                 } else {
6258                         die_error(400, "Missing one of the blob diff parameters");
6259                 }
6260
6261                 if (@difftree > 1) {
6262                         die_error(400, "Ambiguous blob diff specification");
6263                 }
6264
6265                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6266                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6267                 $file_name   ||= $diffinfo{'to_file'};
6268
6269                 $hash_parent ||= $diffinfo{'from_id'};
6270                 $hash        ||= $diffinfo{'to_id'};
6271
6272                 # non-textual hash id's can be cached
6273                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6274                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6275                         $expires = '+1d';
6276                 }
6277
6278                 # open patch output
6279                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6280                         '-p', ($format eq 'html' ? "--full-index" : ()),
6281                         $hash_parent_base, $hash_base,
6282                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6283                         or die_error(500, "Open git-diff-tree failed");
6284         }
6285
6286         # old/legacy style URI -- not generated anymore since 1.4.3.
6287         if (!%diffinfo) {
6288                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6289         }
6290
6291         # header
6292         if ($format eq 'html') {
6293                 my $formats_nav =
6294                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6295                                 "raw");
6296                 git_header_html(undef, $expires);
6297                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6298                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6299                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6300                 } else {
6301                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6302                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6303                 }
6304                 if (defined $file_name) {
6305                         git_print_page_path($file_name, "blob", $hash_base);
6306                 } else {
6307                         print "<div class=\"page_path\"></div>\n";
6308                 }
6309
6310         } elsif ($format eq 'plain') {
6311                 print $cgi->header(
6312                         -type => 'text/plain',
6313                         -charset => 'utf-8',
6314                         -expires => $expires,
6315                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6316
6317                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6318
6319         } else {
6320                 die_error(400, "Unknown blobdiff format");
6321         }
6322
6323         # patch
6324         if ($format eq 'html') {
6325                 print "<div class=\"page_body\">\n";
6326
6327                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6328                 close $fd;
6329
6330                 print "</div>\n"; # class="page_body"
6331                 git_footer_html();
6332
6333         } else {
6334                 while (my $line = <$fd>) {
6335                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6336                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6337
6338                         print $line;
6339
6340                         last if $line =~ m!^\+\+\+!;
6341                 }
6342                 local $/ = undef;
6343                 print <$fd>;
6344                 close $fd;
6345         }
6346 }
6347
6348 sub git_blobdiff_plain {
6349         git_blobdiff('plain');
6350 }
6351
6352 sub git_commitdiff {
6353         my %params = @_;
6354         my $format = $params{-format} || 'html';
6355
6356         my ($patch_max) = gitweb_get_feature('patches');
6357         if ($format eq 'patch') {
6358                 die_error(403, "Patch view not allowed") unless $patch_max;
6359         }
6360
6361         $hash ||= $hash_base || "HEAD";
6362         my %co = parse_commit($hash)
6363             or die_error(404, "Unknown commit object");
6364
6365         # choose format for commitdiff for merge
6366         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6367                 $hash_parent = '--cc';
6368         }
6369         # we need to prepare $formats_nav before almost any parameter munging
6370         my $formats_nav;
6371         if ($format eq 'html') {
6372                 $formats_nav =
6373                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6374                                 "raw");
6375                 if ($patch_max && @{$co{'parents'}} <= 1) {
6376                         $formats_nav .= " | " .
6377                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6378                                         "patch");
6379                 }
6380
6381                 if (defined $hash_parent &&
6382                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6383                         # commitdiff with two commits given
6384                         my $hash_parent_short = $hash_parent;
6385                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6386                                 $hash_parent_short = substr($hash_parent, 0, 7);
6387                         }
6388                         $formats_nav .=
6389                                 ' (from';
6390                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6391                                 if ($co{'parents'}[$i] eq $hash_parent) {
6392                                         $formats_nav .= ' parent ' . ($i+1);
6393                                         last;
6394                                 }
6395                         }
6396                         $formats_nav .= ': ' .
6397                                 $cgi->a({-href => href(action=>"commitdiff",
6398                                                        hash=>$hash_parent)},
6399                                         esc_html($hash_parent_short)) .
6400                                 ')';
6401                 } elsif (!$co{'parent'}) {
6402                         # --root commitdiff
6403                         $formats_nav .= ' (initial)';
6404                 } elsif (scalar @{$co{'parents'}} == 1) {
6405                         # single parent commit
6406                         $formats_nav .=
6407                                 ' (parent: ' .
6408                                 $cgi->a({-href => href(action=>"commitdiff",
6409                                                        hash=>$co{'parent'})},
6410                                         esc_html(substr($co{'parent'}, 0, 7))) .
6411                                 ')';
6412                 } else {
6413                         # merge commit
6414                         if ($hash_parent eq '--cc') {
6415                                 $formats_nav .= ' | ' .
6416                                         $cgi->a({-href => href(action=>"commitdiff",
6417                                                                hash=>$hash, hash_parent=>'-c')},
6418                                                 'combined');
6419                         } else { # $hash_parent eq '-c'
6420                                 $formats_nav .= ' | ' .
6421                                         $cgi->a({-href => href(action=>"commitdiff",
6422                                                                hash=>$hash, hash_parent=>'--cc')},
6423                                                 'compact');
6424                         }
6425                         $formats_nav .=
6426                                 ' (merge: ' .
6427                                 join(' ', map {
6428                                         $cgi->a({-href => href(action=>"commitdiff",
6429                                                                hash=>$_)},
6430                                                 esc_html(substr($_, 0, 7)));
6431                                 } @{$co{'parents'}} ) .
6432                                 ')';
6433                 }
6434         }
6435
6436         my $hash_parent_param = $hash_parent;
6437         if (!defined $hash_parent_param) {
6438                 # --cc for multiple parents, --root for parentless
6439                 $hash_parent_param =
6440                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6441         }
6442
6443         # read commitdiff
6444         my $fd;
6445         my @difftree;
6446         if ($format eq 'html') {
6447                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6448                         "--no-commit-id", "--patch-with-raw", "--full-index",
6449                         $hash_parent_param, $hash, "--"
6450                         or die_error(500, "Open git-diff-tree failed");
6451
6452                 while (my $line = <$fd>) {
6453                         chomp $line;
6454                         # empty line ends raw part of diff-tree output
6455                         last unless $line;
6456                         push @difftree, scalar parse_difftree_raw_line($line);
6457                 }
6458
6459         } elsif ($format eq 'plain') {
6460                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6461                         '-p', $hash_parent_param, $hash, "--"
6462                         or die_error(500, "Open git-diff-tree failed");
6463         } elsif ($format eq 'patch') {
6464                 # For commit ranges, we limit the output to the number of
6465                 # patches specified in the 'patches' feature.
6466                 # For single commits, we limit the output to a single patch,
6467                 # diverging from the git-format-patch default.
6468                 my @commit_spec = ();
6469                 if ($hash_parent) {
6470                         if ($patch_max > 0) {
6471                                 push @commit_spec, "-$patch_max";
6472                         }
6473                         push @commit_spec, '-n', "$hash_parent..$hash";
6474                 } else {
6475                         if ($params{-single}) {
6476                                 push @commit_spec, '-1';
6477                         } else {
6478                                 if ($patch_max > 0) {
6479                                         push @commit_spec, "-$patch_max";
6480                                 }
6481                                 push @commit_spec, "-n";
6482                         }
6483                         push @commit_spec, '--root', $hash;
6484                 }
6485                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6486                         '--encoding=utf8', '--stdout', @commit_spec
6487                         or die_error(500, "Open git-format-patch failed");
6488         } else {
6489                 die_error(400, "Unknown commitdiff format");
6490         }
6491
6492         # non-textual hash id's can be cached
6493         my $expires;
6494         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6495                 $expires = "+1d";
6496         }
6497
6498         # write commit message
6499         if ($format eq 'html') {
6500                 my $refs = git_get_references();
6501                 my $ref = format_ref_marker($refs, $co{'id'});
6502
6503                 git_header_html(undef, $expires);
6504                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6505                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6506                 print "<div class=\"title_text\">\n" .
6507                       "<table class=\"object_header\">\n";
6508                 git_print_authorship_rows(\%co);
6509                 print "</table>".
6510                       "</div>\n";
6511                 print "<div class=\"page_body\">\n";
6512                 if (@{$co{'comment'}} > 1) {
6513                         print "<div class=\"log\">\n";
6514                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6515                         print "</div>\n"; # class="log"
6516                 }
6517
6518         } elsif ($format eq 'plain') {
6519                 my $refs = git_get_references("tags");
6520                 my $tagname = git_get_rev_name_tags($hash);
6521                 my $filename = basename($project) . "-$hash.patch";
6522
6523                 print $cgi->header(
6524                         -type => 'text/plain',
6525                         -charset => 'utf-8',
6526                         -expires => $expires,
6527                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6528                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6529                 print "From: " . to_utf8($co{'author'}) . "\n";
6530                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6531                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6532
6533                 print "X-Git-Tag: $tagname\n" if $tagname;
6534                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6535
6536                 foreach my $line (@{$co{'comment'}}) {
6537                         print to_utf8($line) . "\n";
6538                 }
6539                 print "---\n\n";
6540         } elsif ($format eq 'patch') {
6541                 my $filename = basename($project) . "-$hash.patch";
6542
6543                 print $cgi->header(
6544                         -type => 'text/plain',
6545                         -charset => 'utf-8',
6546                         -expires => $expires,
6547                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6548         }
6549
6550         # write patch
6551         if ($format eq 'html') {
6552                 my $use_parents = !defined $hash_parent ||
6553                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6554                 git_difftree_body(\@difftree, $hash,
6555                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6556                 print "<br/>\n";
6557
6558                 git_patchset_body($fd, \@difftree, $hash,
6559                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6560                 close $fd;
6561                 print "</div>\n"; # class="page_body"
6562                 git_footer_html();
6563
6564         } elsif ($format eq 'plain') {
6565                 local $/ = undef;
6566                 print <$fd>;
6567                 close $fd
6568                         or print "Reading git-diff-tree failed\n";
6569         } elsif ($format eq 'patch') {
6570                 local $/ = undef;
6571                 print <$fd>;
6572                 close $fd
6573                         or print "Reading git-format-patch failed\n";
6574         }
6575 }
6576
6577 sub git_commitdiff_plain {
6578         git_commitdiff(-format => 'plain');
6579 }
6580
6581 # format-patch-style patches
6582 sub git_patch {
6583         git_commitdiff(-format => 'patch', -single => 1);
6584 }
6585
6586 sub git_patches {
6587         git_commitdiff(-format => 'patch');
6588 }
6589
6590 sub git_history {
6591         git_log_generic('history', \&git_history_body,
6592                         $hash_base, $hash_parent_base,
6593                         $file_name, $hash);
6594 }
6595
6596 sub git_search {
6597         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6598         if (!defined $searchtext) {
6599                 die_error(400, "Text field is empty");
6600         }
6601         if (!defined $hash) {
6602                 $hash = git_get_head_hash($project);
6603         }
6604         my %co = parse_commit($hash);
6605         if (!%co) {
6606                 die_error(404, "Unknown commit object");
6607         }
6608         if (!defined $page) {
6609                 $page = 0;
6610         }
6611
6612         $searchtype ||= 'commit';
6613         if ($searchtype eq 'pickaxe') {
6614                 # pickaxe may take all resources of your box and run for several minutes
6615                 # with every query - so decide by yourself how public you make this feature
6616                 gitweb_check_feature('pickaxe')
6617                     or die_error(403, "Pickaxe is disabled");
6618         }
6619         if ($searchtype eq 'grep') {
6620                 gitweb_check_feature('grep')[0]
6621                     or die_error(403, "Grep is disabled");
6622         }
6623
6624         git_header_html();
6625
6626         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6627                 my $greptype;
6628                 if ($searchtype eq 'commit') {
6629                         $greptype = "--grep=";
6630                 } elsif ($searchtype eq 'author') {
6631                         $greptype = "--author=";
6632                 } elsif ($searchtype eq 'committer') {
6633                         $greptype = "--committer=";
6634                 }
6635                 $greptype .= $searchtext;
6636                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6637                                                $greptype, '--regexp-ignore-case',
6638                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6639
6640                 my $paging_nav = '';
6641                 if ($page > 0) {
6642                         $paging_nav .=
6643                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6644                                                        searchtext=>$searchtext,
6645                                                        searchtype=>$searchtype)},
6646                                         "first");
6647                         $paging_nav .= " &sdot; " .
6648                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6649                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6650                 } else {
6651                         $paging_nav .= "first";
6652                         $paging_nav .= " &sdot; prev";
6653                 }
6654                 my $next_link = '';
6655                 if ($#commitlist >= 100) {
6656                         $next_link =
6657                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6658                                          -accesskey => "n", -title => "Alt-n"}, "next");
6659                         $paging_nav .= " &sdot; $next_link";
6660                 } else {
6661                         $paging_nav .= " &sdot; next";
6662                 }
6663
6664                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6665                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6666                 if ($page == 0 && !@commitlist) {
6667                         print "<p>No match.</p>\n";
6668                 } else {
6669                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6670                 }
6671         }
6672
6673         if ($searchtype eq 'pickaxe') {
6674                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6675                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6676
6677                 print "<table class=\"pickaxe search\">\n";
6678                 my $alternate = 1;
6679                 local $/ = "\n";
6680                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6681                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6682                         ($search_use_regexp ? '--pickaxe-regex' : ());
6683                 undef %co;
6684                 my @files;
6685                 while (my $line = <$fd>) {
6686                         chomp $line;
6687                         next unless $line;
6688
6689                         my %set = parse_difftree_raw_line($line);
6690                         if (defined $set{'commit'}) {
6691                                 # finish previous commit
6692                                 if (%co) {
6693                                         print "</td>\n" .
6694                                               "<td class=\"link\">" .
6695                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6696                                               " | " .
6697                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6698                                         print "</td>\n" .
6699                                               "</tr>\n";
6700                                 }
6701
6702                                 if ($alternate) {
6703                                         print "<tr class=\"dark\">\n";
6704                                 } else {
6705                                         print "<tr class=\"light\">\n";
6706                                 }
6707                                 $alternate ^= 1;
6708                                 %co = parse_commit($set{'commit'});
6709                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6710                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6711                                       "<td><i>$author</i></td>\n" .
6712                                       "<td>" .
6713                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6714                                               -class => "list subject"},
6715                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6716                         } elsif (defined $set{'to_id'}) {
6717                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6718
6719                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6720                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6721                                               -class => "list"},
6722                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6723                                       "<br/>\n";
6724                         }
6725                 }
6726                 close $fd;
6727
6728                 # finish last commit (warning: repetition!)
6729                 if (%co) {
6730                         print "</td>\n" .
6731                               "<td class=\"link\">" .
6732                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6733                               " | " .
6734                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6735                         print "</td>\n" .
6736                               "</tr>\n";
6737                 }
6738
6739                 print "</table>\n";
6740         }
6741
6742         if ($searchtype eq 'grep') {
6743                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6744                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6745
6746                 print "<table class=\"grep_search\">\n";
6747                 my $alternate = 1;
6748                 my $matches = 0;
6749                 local $/ = "\n";
6750                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6751                         $search_use_regexp ? ('-E', '-i') : '-F',
6752                         $searchtext, $co{'tree'};
6753                 my $lastfile = '';
6754                 while (my $line = <$fd>) {
6755                         chomp $line;
6756                         my ($file, $lno, $ltext, $binary);
6757                         last if ($matches++ > 1000);
6758                         if ($line =~ /^Binary file (.+) matches$/) {
6759                                 $file = $1;
6760                                 $binary = 1;
6761                         } else {
6762                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6763                         }
6764                         if ($file ne $lastfile) {
6765                                 $lastfile and print "</td></tr>\n";
6766                                 if ($alternate++) {
6767                                         print "<tr class=\"dark\">\n";
6768                                 } else {
6769                                         print "<tr class=\"light\">\n";
6770                                 }
6771                                 print "<td class=\"list\">".
6772                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6773                                                                file_name=>"$file"),
6774                                                 -class => "list"}, esc_path($file));
6775                                 print "</td><td>\n";
6776                                 $lastfile = $file;
6777                         }
6778                         if ($binary) {
6779                                 print "<div class=\"binary\">Binary file</div>\n";
6780                         } else {
6781                                 $ltext = untabify($ltext);
6782                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6783                                         $ltext = esc_html($1, -nbsp=>1);
6784                                         $ltext .= '<span class="match">';
6785                                         $ltext .= esc_html($2, -nbsp=>1);
6786                                         $ltext .= '</span>';
6787                                         $ltext .= esc_html($3, -nbsp=>1);
6788                                 } else {
6789                                         $ltext = esc_html($ltext, -nbsp=>1);
6790                                 }
6791                                 print "<div class=\"pre\">" .
6792                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6793                                                                file_name=>"$file").'#l'.$lno,
6794                                                 -class => "linenr"}, sprintf('%4i', $lno))
6795                                         . ' ' .  $ltext . "</div>\n";
6796                         }
6797                 }
6798                 if ($lastfile) {
6799                         print "</td></tr>\n";
6800                         if ($matches > 1000) {
6801                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6802                         }
6803                 } else {
6804                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6805                 }
6806                 close $fd;
6807
6808                 print "</table>\n";
6809         }
6810         git_footer_html();
6811 }
6812
6813 sub git_search_help {
6814         git_header_html();
6815         git_print_page_nav('','', $hash,$hash,$hash);
6816         print <<EOT;
6817 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6818 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6819 the pattern entered is recognized as the POSIX extended
6820 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6821 insensitive).</p>
6822 <dl>
6823 <dt><b>commit</b></dt>
6824 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6825 EOT
6826         my $have_grep = gitweb_check_feature('grep');
6827         if ($have_grep) {
6828                 print <<EOT;
6829 <dt><b>grep</b></dt>
6830 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6831     a different one) are searched for the given pattern. On large trees, this search can take
6832 a while and put some strain on the server, so please use it with some consideration. Note that
6833 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6834 case-sensitive.</dd>
6835 EOT
6836         }
6837         print <<EOT;
6838 <dt><b>author</b></dt>
6839 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6840 <dt><b>committer</b></dt>
6841 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6842 EOT
6843         my $have_pickaxe = gitweb_check_feature('pickaxe');
6844         if ($have_pickaxe) {
6845                 print <<EOT;
6846 <dt><b>pickaxe</b></dt>
6847 <dd>All commits that caused the string to appear or disappear from any file (changes that
6848 added, removed or "modified" the string) will be listed. This search can take a while and
6849 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6850 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6851 EOT
6852         }
6853         print "</dl>\n";
6854         git_footer_html();
6855 }
6856
6857 sub git_shortlog {
6858         git_log_generic('shortlog', \&git_shortlog_body,
6859                         $hash, $hash_parent);
6860 }
6861
6862 ## ......................................................................
6863 ## feeds (RSS, Atom; OPML)
6864
6865 sub git_feed {
6866         my $format = shift || 'atom';
6867         my $have_blame = gitweb_check_feature('blame');
6868
6869         # Atom: http://www.atomenabled.org/developers/syndication/
6870         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6871         if ($format ne 'rss' && $format ne 'atom') {
6872                 die_error(400, "Unknown web feed format");
6873         }
6874
6875         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6876         my $head = $hash || 'HEAD';
6877         my @commitlist = parse_commits($head, 150, 0, $file_name);
6878
6879         my %latest_commit;
6880         my %latest_date;
6881         my $content_type = "application/$format+xml";
6882         if (defined $cgi->http('HTTP_ACCEPT') &&
6883                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6884                 # browser (feed reader) prefers text/xml
6885                 $content_type = 'text/xml';
6886         }
6887         if (defined($commitlist[0])) {
6888                 %latest_commit = %{$commitlist[0]};
6889                 my $latest_epoch = $latest_commit{'committer_epoch'};
6890                 %latest_date   = parse_date($latest_epoch);
6891                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6892                 if (defined $if_modified) {
6893                         my $since;
6894                         if (eval { require HTTP::Date; 1; }) {
6895                                 $since = HTTP::Date::str2time($if_modified);
6896                         } elsif (eval { require Time::ParseDate; 1; }) {
6897                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6898                         }
6899                         if (defined $since && $latest_epoch <= $since) {
6900                                 print $cgi->header(
6901                                         -type => $content_type,
6902                                         -charset => 'utf-8',
6903                                         -last_modified => $latest_date{'rfc2822'},
6904                                         -status => '304 Not Modified');
6905                                 return;
6906                         }
6907                 }
6908                 print $cgi->header(
6909                         -type => $content_type,
6910                         -charset => 'utf-8',
6911                         -last_modified => $latest_date{'rfc2822'});
6912         } else {
6913                 print $cgi->header(
6914                         -type => $content_type,
6915                         -charset => 'utf-8');
6916         }
6917
6918         # Optimization: skip generating the body if client asks only
6919         # for Last-Modified date.
6920         return if ($cgi->request_method() eq 'HEAD');
6921
6922         # header variables
6923         my $title = "$site_name - $project/$action";
6924         my $feed_type = 'log';
6925         if (defined $hash) {
6926                 $title .= " - '$hash'";
6927                 $feed_type = 'branch log';
6928                 if (defined $file_name) {
6929                         $title .= " :: $file_name";
6930                         $feed_type = 'history';
6931                 }
6932         } elsif (defined $file_name) {
6933                 $title .= " - $file_name";
6934                 $feed_type = 'history';
6935         }
6936         $title .= " $feed_type";
6937         my $descr = git_get_project_description($project);
6938         if (defined $descr) {
6939                 $descr = esc_html($descr);
6940         } else {
6941                 $descr = "$project " .
6942                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6943                          " feed";
6944         }
6945         my $owner = git_get_project_owner($project);
6946         $owner = esc_html($owner);
6947
6948         #header
6949         my $alt_url;
6950         if (defined $file_name) {
6951                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6952         } elsif (defined $hash) {
6953                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6954         } else {
6955                 $alt_url = href(-full=>1, action=>"summary");
6956         }
6957         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6958         if ($format eq 'rss') {
6959                 print <<XML;
6960 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6961 <channel>
6962 XML
6963                 print "<title>$title</title>\n" .
6964                       "<link>$alt_url</link>\n" .
6965                       "<description>$descr</description>\n" .
6966                       "<language>en</language>\n" .
6967                       # project owner is responsible for 'editorial' content
6968                       "<managingEditor>$owner</managingEditor>\n";
6969                 if (defined $logo || defined $favicon) {
6970                         # prefer the logo to the favicon, since RSS
6971                         # doesn't allow both
6972                         my $img = esc_url($logo || $favicon);
6973                         print "<image>\n" .
6974                               "<url>$img</url>\n" .
6975                               "<title>$title</title>\n" .
6976                               "<link>$alt_url</link>\n" .
6977                               "</image>\n";
6978                 }
6979                 if (%latest_date) {
6980                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6981                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6982                 }
6983                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6984         } elsif ($format eq 'atom') {
6985                 print <<XML;
6986 <feed xmlns="http://www.w3.org/2005/Atom">
6987 XML
6988                 print "<title>$title</title>\n" .
6989                       "<subtitle>$descr</subtitle>\n" .
6990                       '<link rel="alternate" type="text/html" href="' .
6991                       $alt_url . '" />' . "\n" .
6992                       '<link rel="self" type="' . $content_type . '" href="' .
6993                       $cgi->self_url() . '" />' . "\n" .
6994                       "<id>" . href(-full=>1) . "</id>\n" .
6995                       # use project owner for feed author
6996                       "<author><name>$owner</name></author>\n";
6997                 if (defined $favicon) {
6998                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6999                 }
7000                 if (defined $logo_url) {
7001                         # not twice as wide as tall: 72 x 27 pixels
7002                         print "<logo>" . esc_url($logo) . "</logo>\n";
7003                 }
7004                 if (! %latest_date) {
7005                         # dummy date to keep the feed valid until commits trickle in:
7006                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7007                 } else {
7008                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7009                 }
7010                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7011         }
7012
7013         # contents
7014         for (my $i = 0; $i <= $#commitlist; $i++) {
7015                 my %co = %{$commitlist[$i]};
7016                 my $commit = $co{'id'};
7017                 # we read 150, we always show 30 and the ones more recent than 48 hours
7018                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7019                         last;
7020                 }
7021                 my %cd = parse_date($co{'author_epoch'});
7022
7023                 # get list of changed files
7024                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7025                         $co{'parent'} || "--root",
7026                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7027                         or next;
7028                 my @difftree = map { chomp; $_ } <$fd>;
7029                 close $fd
7030                         or next;
7031
7032                 # print element (entry, item)
7033                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7034                 if ($format eq 'rss') {
7035                         print "<item>\n" .
7036                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7037                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7038                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7039                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7040                               "<link>$co_url</link>\n" .
7041                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7042                               "<content:encoded>" .
7043                               "<![CDATA[\n";
7044                 } elsif ($format eq 'atom') {
7045                         print "<entry>\n" .
7046                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7047                               "<updated>$cd{'iso-8601'}</updated>\n" .
7048                               "<author>\n" .
7049                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7050                         if ($co{'author_email'}) {
7051                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7052                         }
7053                         print "</author>\n" .
7054                               # use committer for contributor
7055                               "<contributor>\n" .
7056                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7057                         if ($co{'committer_email'}) {
7058                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7059                         }
7060                         print "</contributor>\n" .
7061                               "<published>$cd{'iso-8601'}</published>\n" .
7062                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7063                               "<id>$co_url</id>\n" .
7064                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7065                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7066                 }
7067                 my $comment = $co{'comment'};
7068                 print "<pre>\n";
7069                 foreach my $line (@$comment) {
7070                         $line = esc_html($line);
7071                         print "$line\n";
7072                 }
7073                 print "</pre><ul>\n";
7074                 foreach my $difftree_line (@difftree) {
7075                         my %difftree = parse_difftree_raw_line($difftree_line);
7076                         next if !$difftree{'from_id'};
7077
7078                         my $file = $difftree{'file'} || $difftree{'to_file'};
7079
7080                         print "<li>" .
7081                               "[" .
7082                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7083                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7084                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7085                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7086                                       -title => "diff"}, 'D');
7087                         if ($have_blame) {
7088                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7089                                                              file_name=>$file, hash_base=>$commit),
7090                                               -title => "blame"}, 'B');
7091                         }
7092                         # if this is not a feed of a file history
7093                         if (!defined $file_name || $file_name ne $file) {
7094                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7095                                                              file_name=>$file, hash=>$commit),
7096                                               -title => "history"}, 'H');
7097                         }
7098                         $file = esc_path($file);
7099                         print "] ".
7100                               "$file</li>\n";
7101                 }
7102                 if ($format eq 'rss') {
7103                         print "</ul>]]>\n" .
7104                               "</content:encoded>\n" .
7105                               "</item>\n";
7106                 } elsif ($format eq 'atom') {
7107                         print "</ul>\n</div>\n" .
7108                               "</content>\n" .
7109                               "</entry>\n";
7110                 }
7111         }
7112
7113         # end of feed
7114         if ($format eq 'rss') {
7115                 print "</channel>\n</rss>\n";
7116         } elsif ($format eq 'atom') {
7117                 print "</feed>\n";
7118         }
7119 }
7120
7121 sub git_rss {
7122         git_feed('rss');
7123 }
7124
7125 sub git_atom {
7126         git_feed('atom');
7127 }
7128
7129 sub git_opml {
7130         my @list = git_get_projects_list();
7131
7132         print $cgi->header(
7133                 -type => 'text/xml',
7134                 -charset => 'utf-8',
7135                 -content_disposition => 'inline; filename="opml.xml"');
7136
7137         print <<XML;
7138 <?xml version="1.0" encoding="utf-8"?>
7139 <opml version="1.0">
7140 <head>
7141   <title>$site_name OPML Export</title>
7142 </head>
7143 <body>
7144 <outline text="git RSS feeds">
7145 XML
7146
7147         foreach my $pr (@list) {
7148                 my %proj = %$pr;
7149                 my $head = git_get_head_hash($proj{'path'});
7150                 if (!defined $head) {
7151                         next;
7152                 }
7153                 $git_dir = "$projectroot/$proj{'path'}";
7154                 my %co = parse_commit($head);
7155                 if (!%co) {
7156                         next;
7157                 }
7158
7159                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7160                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7161                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7162                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7163         }
7164         print <<XML;
7165 </outline>
7166 </body>
7167 </opml>
7168 XML
7169 }