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