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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # Path to the highlight executable to use (must be the one from
 169 # http://www.andre-simon.de due to assumptions about parameters and output).
 170 # Useful if highlight is not installed on your webserver's PATH.
 171 # [Default: highlight]
 172 our $highlight_bin = "++HIGHLIGHT_BIN++";
 173
 174 # information about snapshot formats that gitweb is capable of serving
 175 our %known_snapshot_formats = (
 176         # name => {
 177         #       'display' => display name,
 178         #       'type' => mime type,
 179         #       'suffix' => filename suffix,
 180         #       'format' => --format for git-archive,
 181         #       'compressor' => [compressor command and arguments]
 182         #                       (array reference, optional)
 183         #       'disabled' => boolean (optional)}
 184         #
 185         'tgz' => {
 186                 'display' => 'tar.gz',
 187                 'type' => 'application/x-gzip',
 188                 'suffix' => '.tar.gz',
 189                 'format' => 'tar',
 190                 'compressor' => ['gzip']},
 191
 192         'tbz2' => {
 193                 'display' => 'tar.bz2',
 194                 'type' => 'application/x-bzip2',
 195                 'suffix' => '.tar.bz2',
 196                 'format' => 'tar',
 197                 'compressor' => ['bzip2']},
 198
 199         'txz' => {
 200                 'display' => 'tar.xz',
 201                 'type' => 'application/x-xz',
 202                 'suffix' => '.tar.xz',
 203                 'format' => 'tar',
 204                 'compressor' => ['xz'],
 205                 'disabled' => 1},
 206
 207         'zip' => {
 208                 'display' => 'zip',
 209                 'type' => 'application/x-zip',
 210                 'suffix' => '.zip',
 211                 'format' => 'zip'},
 212 );
 213
 214 # Aliases so we understand old gitweb.snapshot values in repository
 215 # configuration.
 216 our %known_snapshot_format_aliases = (
 217         'gzip'  => 'tgz',
 218         'bzip2' => 'tbz2',
 219         'xz'    => 'txz',
 220
 221         # backward compatibility: legacy gitweb config support
 222         'x-gzip' => undef, 'gz' => undef,
 223         'x-bzip2' => undef, 'bz2' => undef,
 224         'x-zip' => undef, '' => undef,
 225 );
 226
 227 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 228 # are changed, it may be appropriate to change these values too via
 229 # $GITWEB_CONFIG.
 230 our %avatar_size = (
 231         'default' => 16,
 232         'double'  => 32
 233 );
 234
 235 # Used to set the maximum load that we will still respond to gitweb queries.
 236 # If server load exceed this value then return "503 server busy" error.
 237 # If gitweb cannot determined server load, it is taken to be 0.
 238 # Leave it undefined (or set to 'undef') to turn off load checking.
 239 our $maxload = 300;
 240
 241 # configuration for 'highlight' (http://www.andre-simon.de/)
 242 # match by basename
 243 our %highlight_basename = (
 244         #'Program' => 'py',
 245         #'Library' => 'py',
 246         'SConstruct' => 'py', # SCons equivalent of Makefile
 247         'Makefile' => 'make',
 248 );
 249 # match by extension
 250 our %highlight_ext = (
 251         # main extensions, defining name of syntax;
 252         # see files in /usr/share/highlight/langDefs/ directory
 253         map { $_ => $_ }
 254                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         'mak' => 'make',
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 616 sub evaluate_gitweb_config {
 617         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 618         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 619         # die if there are errors parsing config file
 620         if (-e $GITWEB_CONFIG) {
 621                 do $GITWEB_CONFIG;
 622                 die $@ if $@;
 623         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 624                 do $GITWEB_CONFIG_SYSTEM;
 625                 die $@ if $@;
 626         }
 627 }
 628
 629 # Get loadavg of system, to compare against $maxload.
 630 # Currently it requires '/proc/loadavg' present to get loadavg;
 631 # if it is not present it returns 0, which means no load checking.
 632 sub get_loadavg {
 633         if( -e '/proc/loadavg' ){
 634                 open my $fd, '<', '/proc/loadavg'
 635                         or return 0;
 636                 my @load = split(/\s+/, scalar <$fd>);
 637                 close $fd;
 638
 639                 # The first three columns measure CPU and IO utilization of the last one,
 640                 # five, and 10 minute periods.  The fourth column shows the number of
 641                 # currently running processes and the total number of processes in the m/n
 642                 # format.  The last column displays the last process ID used.
 643                 return $load[0] || 0;
 644         }
 645         # additional checks for load average should go here for things that don't export
 646         # /proc/loadavg
 647
 648         return 0;
 649 }
 650
 651 # version of the core git binary
 652 our $git_version;
 653 sub evaluate_git_version {
 654         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 655         $number_of_git_cmds++;
 656 }
 657
 658 sub check_loadavg {
 659         if (defined $maxload && get_loadavg() > $maxload) {
 660                 die_error(503, "The load average on the server is too high");
 661         }
 662 }
 663
 664 # ======================================================================
 665 # input validation and dispatch
 666
 667 # input parameters can be collected from a variety of sources (presently, CGI
 668 # and PATH_INFO), so we define an %input_params hash that collects them all
 669 # together during validation: this allows subsequent uses (e.g. href()) to be
 670 # agnostic of the parameter origin
 671
 672 our %input_params = ();
 673
 674 # input parameters are stored with the long parameter name as key. This will
 675 # also be used in the href subroutine to convert parameters to their CGI
 676 # equivalent, and since the href() usage is the most frequent one, we store
 677 # the name -> CGI key mapping here, instead of the reverse.
 678 #
 679 # XXX: Warning: If you touch this, check the search form for updating,
 680 # too.
 681
 682 our @cgi_param_mapping = (
 683         project => "p",
 684         action => "a",
 685         file_name => "f",
 686         file_parent => "fp",
 687         hash => "h",
 688         hash_parent => "hp",
 689         hash_base => "hb",
 690         hash_parent_base => "hpb",
 691         page => "pg",
 692         order => "o",
 693         searchtext => "s",
 694         searchtype => "st",
 695         snapshot_format => "sf",
 696         extra_options => "opt",
 697         search_use_regexp => "sr",
 698         # this must be last entry (for manipulation from JavaScript)
 699         javascript => "js"
 700 );
 701 our %cgi_param_mapping = @cgi_param_mapping;
 702
 703 # we will also need to know the possible actions, for validation
 704 our %actions = (
 705         "blame" => \&git_blame,
 706         "blame_incremental" => \&git_blame_incremental,
 707         "blame_data" => \&git_blame_data,
 708         "blobdiff" => \&git_blobdiff,
 709         "blobdiff_plain" => \&git_blobdiff_plain,
 710         "blob" => \&git_blob,
 711         "blob_plain" => \&git_blob_plain,
 712         "commitdiff" => \&git_commitdiff,
 713         "commitdiff_plain" => \&git_commitdiff_plain,
 714         "commit" => \&git_commit,
 715         "forks" => \&git_forks,
 716         "heads" => \&git_heads,
 717         "history" => \&git_history,
 718         "log" => \&git_log,
 719         "patch" => \&git_patch,
 720         "patches" => \&git_patches,
 721         "remotes" => \&git_remotes,
 722         "rss" => \&git_rss,
 723         "atom" => \&git_atom,
 724         "search" => \&git_search,
 725         "search_help" => \&git_search_help,
 726         "shortlog" => \&git_shortlog,
 727         "summary" => \&git_summary,
 728         "tag" => \&git_tag,
 729         "tags" => \&git_tags,
 730         "tree" => \&git_tree,
 731         "snapshot" => \&git_snapshot,
 732         "object" => \&git_object,
 733         # those below don't need $project
 734         "opml" => \&git_opml,
 735         "project_list" => \&git_project_list,
 736         "project_index" => \&git_project_index,
 737 );
 738
 739 # finally, we have the hash of allowed extra_options for the commands that
 740 # allow them
 741 our %allowed_options = (
 742         "--no-merges" => [ qw(rss atom log shortlog history) ],
 743 );
 744
 745 # fill %input_params with the CGI parameters. All values except for 'opt'
 746 # should be single values, but opt can be an array. We should probably
 747 # build an array of parameters that can be multi-valued, but since for the time
 748 # being it's only this one, we just single it out
 749 sub evaluate_query_params {
 750         our $cgi;
 751
 752         while (my ($name, $symbol) = each %cgi_param_mapping) {
 753                 if ($symbol eq 'opt') {
 754                         $input_params{$name} = [ $cgi->param($symbol) ];
 755                 } else {
 756                         $input_params{$name} = $cgi->param($symbol);
 757                 }
 758         }
 759 }
 760
 761 # now read PATH_INFO and update the parameter list for missing parameters
 762 sub evaluate_path_info {
 763         return if defined $input_params{'project'};
 764         return if !$path_info;
 765         $path_info =~ s,^/+,,;
 766         return if !$path_info;
 767
 768         # find which part of PATH_INFO is project
 769         my $project = $path_info;
 770         $project =~ s,/+$,,;
 771         while ($project && !check_head_link("$projectroot/$project")) {
 772                 $project =~ s,/*[^/]*$,,;
 773         }
 774         return unless $project;
 775         $input_params{'project'} = $project;
 776
 777         # do not change any parameters if an action is given using the query string
 778         return if $input_params{'action'};
 779         $path_info =~ s,^\Q$project\E/*,,;
 780
 781         # next, check if we have an action
 782         my $action = $path_info;
 783         $action =~ s,/.*$,,;
 784         if (exists $actions{$action}) {
 785                 $path_info =~ s,^$action/*,,;
 786                 $input_params{'action'} = $action;
 787         }
 788
 789         # list of actions that want hash_base instead of hash, but can have no
 790         # pathname (f) parameter
 791         my @wants_base = (
 792                 'tree',
 793                 'history',
 794         );
 795
 796         # we want to catch, among others
 797         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 798         my ($parentrefname, $parentpathname, $refname, $pathname) =
 799                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 800
 801         # first, analyze the 'current' part
 802         if (defined $pathname) {
 803                 # we got "branch:filename" or "branch:dir/"
 804                 # we could use git_get_type(branch:pathname), but:
 805                 # - it needs $git_dir
 806                 # - it does a git() call
 807                 # - the convention of terminating directories with a slash
 808                 #   makes it superfluous
 809                 # - embedding the action in the PATH_INFO would make it even
 810                 #   more superfluous
 811                 $pathname =~ s,^/+,,;
 812                 if (!$pathname || substr($pathname, -1) eq "/") {
 813                         $input_params{'action'} ||= "tree";
 814                         $pathname =~ s,/$,,;
 815                 } else {
 816                         # the default action depends on whether we had parent info
 817                         # or not
 818                         if ($parentrefname) {
 819                                 $input_params{'action'} ||= "blobdiff_plain";
 820                         } else {
 821                                 $input_params{'action'} ||= "blob_plain";
 822                         }
 823                 }
 824                 $input_params{'hash_base'} ||= $refname;
 825                 $input_params{'file_name'} ||= $pathname;
 826         } elsif (defined $refname) {
 827                 # we got "branch". In this case we have to choose if we have to
 828                 # set hash or hash_base.
 829                 #
 830                 # Most of the actions without a pathname only want hash to be
 831                 # set, except for the ones specified in @wants_base that want
 832                 # hash_base instead. It should also be noted that hand-crafted
 833                 # links having 'history' as an action and no pathname or hash
 834                 # set will fail, but that happens regardless of PATH_INFO.
 835                 if (defined $parentrefname) {
 836                         # if there is parent let the default be 'shortlog' action
 837                         # (for http://git.example.com/repo.git/A..B links); if there
 838                         # is no parent, dispatch will detect type of object and set
 839                         # action appropriately if required (if action is not set)
 840                         $input_params{'action'} ||= "shortlog";
 841                 }
 842                 if ($input_params{'action'} &&
 843                     grep { $_ eq $input_params{'action'} } @wants_base) {
 844                         $input_params{'hash_base'} ||= $refname;
 845                 } else {
 846                         $input_params{'hash'} ||= $refname;
 847                 }
 848         }
 849
 850         # next, handle the 'parent' part, if present
 851         if (defined $parentrefname) {
 852                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 853                 # someproject/blobdiff/oldrev..newrev:/filename
 854                 if ($parentpathname) {
 855                         $parentpathname =~ s,^/+,,;
 856                         $parentpathname =~ s,/$,,;
 857                         $input_params{'file_parent'} ||= $parentpathname;
 858                 } else {
 859                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 860                 }
 861                 # we assume that hash_parent_base is wanted if a path was specified,
 862                 # or if the action wants hash_base instead of hash
 863                 if (defined $input_params{'file_parent'} ||
 864                         grep { $_ eq $input_params{'action'} } @wants_base) {
 865                         $input_params{'hash_parent_base'} ||= $parentrefname;
 866                 } else {
 867                         $input_params{'hash_parent'} ||= $parentrefname;
 868                 }
 869         }
 870
 871         # for the snapshot action, we allow URLs in the form
 872         # $project/snapshot/$hash.ext
 873         # where .ext determines the snapshot and gets removed from the
 874         # passed $refname to provide the $hash.
 875         #
 876         # To be able to tell that $refname includes the format extension, we
 877         # require the following two conditions to be satisfied:
 878         # - the hash input parameter MUST have been set from the $refname part
 879         #   of the URL (i.e. they must be equal)
 880         # - the snapshot format MUST NOT have been defined already (e.g. from
 881         #   CGI parameter sf)
 882         # It's also useless to try any matching unless $refname has a dot,
 883         # so we check for that too
 884         if (defined $input_params{'action'} &&
 885                 $input_params{'action'} eq 'snapshot' &&
 886                 defined $refname && index($refname, '.') != -1 &&
 887                 $refname eq $input_params{'hash'} &&
 888                 !defined $input_params{'snapshot_format'}) {
 889                 # We loop over the known snapshot formats, checking for
 890                 # extensions. Allowed extensions are both the defined suffix
 891                 # (which includes the initial dot already) and the snapshot
 892                 # format key itself, with a prepended dot
 893                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 894                         my $hash = $refname;
 895                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 896                                 next;
 897                         }
 898                         my $sfx = $1;
 899                         # a valid suffix was found, so set the snapshot format
 900                         # and reset the hash parameter
 901                         $input_params{'snapshot_format'} = $fmt;
 902                         $input_params{'hash'} = $hash;
 903                         # we also set the format suffix to the one requested
 904                         # in the URL: this way a request for e.g. .tgz returns
 905                         # a .tgz instead of a .tar.gz
 906                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 907                         last;
 908                 }
 909         }
 910 }
 911
 912 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 913      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 914      $searchtext, $search_regexp);
 915 sub evaluate_and_validate_params {
 916         our $action = $input_params{'action'};
 917         if (defined $action) {
 918                 if (!validate_action($action)) {
 919                         die_error(400, "Invalid action parameter");
 920                 }
 921         }
 922
 923         # parameters which are pathnames
 924         our $project = $input_params{'project'};
 925         if (defined $project) {
 926                 if (!validate_project($project)) {
 927                         undef $project;
 928                         die_error(404, "No such project");
 929                 }
 930         }
 931
 932         our $file_name = $input_params{'file_name'};
 933         if (defined $file_name) {
 934                 if (!validate_pathname($file_name)) {
 935                         die_error(400, "Invalid file parameter");
 936                 }
 937         }
 938
 939         our $file_parent = $input_params{'file_parent'};
 940         if (defined $file_parent) {
 941                 if (!validate_pathname($file_parent)) {
 942                         die_error(400, "Invalid file parent parameter");
 943                 }
 944         }
 945
 946         # parameters which are refnames
 947         our $hash = $input_params{'hash'};
 948         if (defined $hash) {
 949                 if (!validate_refname($hash)) {
 950                         die_error(400, "Invalid hash parameter");
 951                 }
 952         }
 953
 954         our $hash_parent = $input_params{'hash_parent'};
 955         if (defined $hash_parent) {
 956                 if (!validate_refname($hash_parent)) {
 957                         die_error(400, "Invalid hash parent parameter");
 958                 }
 959         }
 960
 961         our $hash_base = $input_params{'hash_base'};
 962         if (defined $hash_base) {
 963                 if (!validate_refname($hash_base)) {
 964                         die_error(400, "Invalid hash base parameter");
 965                 }
 966         }
 967
 968         our @extra_options = @{$input_params{'extra_options'}};
 969         # @extra_options is always defined, since it can only be (currently) set from
 970         # CGI, and $cgi->param() returns the empty array in array context if the param
 971         # is not set
 972         foreach my $opt (@extra_options) {
 973                 if (not exists $allowed_options{$opt}) {
 974                         die_error(400, "Invalid option parameter");
 975                 }
 976                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 977                         die_error(400, "Invalid option parameter for this action");
 978                 }
 979         }
 980
 981         our $hash_parent_base = $input_params{'hash_parent_base'};
 982         if (defined $hash_parent_base) {
 983                 if (!validate_refname($hash_parent_base)) {
 984                         die_error(400, "Invalid hash parent base parameter");
 985                 }
 986         }
 987
 988         # other parameters
 989         our $page = $input_params{'page'};
 990         if (defined $page) {
 991                 if ($page =~ m/[^0-9]/) {
 992                         die_error(400, "Invalid page parameter");
 993                 }
 994         }
 995
 996         our $searchtype = $input_params{'searchtype'};
 997         if (defined $searchtype) {
 998                 if ($searchtype =~ m/[^a-z]/) {
 999                         die_error(400, "Invalid searchtype parameter");
1000                 }
1001         }
1002
1003         our $search_use_regexp = $input_params{'search_use_regexp'};
1004
1005         our $searchtext = $input_params{'searchtext'};
1006         our $search_regexp;
1007         if (defined $searchtext) {
1008                 if (length($searchtext) < 2) {
1009                         die_error(403, "At least two characters are required for search parameter");
1010                 }
1011                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1012         }
1013 }
1014
1015 # path to the current git repository
1016 our $git_dir;
1017 sub evaluate_git_dir {
1018         our $git_dir = "$projectroot/$project" if $project;
1019 }
1020
1021 our (@snapshot_fmts, $git_avatar);
1022 sub configure_gitweb_features {
1023         # list of supported snapshot formats
1024         our @snapshot_fmts = gitweb_get_feature('snapshot');
1025         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1026
1027         # check that the avatar feature is set to a known provider name,
1028         # and for each provider check if the dependencies are satisfied.
1029         # if the provider name is invalid or the dependencies are not met,
1030         # reset $git_avatar to the empty string.
1031         our ($git_avatar) = gitweb_get_feature('avatar');
1032         if ($git_avatar eq 'gravatar') {
1033                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1034         } elsif ($git_avatar eq 'picon') {
1035                 # no dependencies
1036         } else {
1037                 $git_avatar = '';
1038         }
1039 }
1040
1041 # custom error handler: 'die <message>' is Internal Server Error
1042 sub handle_errors_html {
1043         my $msg = shift; # it is already HTML escaped
1044
1045         # to avoid infinite loop where error occurs in die_error,
1046         # change handler to default handler, disabling handle_errors_html
1047         set_message("Error occured when inside die_error:\n$msg");
1048
1049         # you cannot jump out of die_error when called as error handler;
1050         # the subroutine set via CGI::Carp::set_message is called _after_
1051         # HTTP headers are already written, so it cannot write them itself
1052         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1053 }
1054 set_message(\&handle_errors_html);
1055
1056 # dispatch
1057 sub dispatch {
1058         if (!defined $action) {
1059                 if (defined $hash) {
1060                         $action = git_get_type($hash);
1061                 } elsif (defined $hash_base && defined $file_name) {
1062                         $action = git_get_type("$hash_base:$file_name");
1063                 } elsif (defined $project) {
1064                         $action = 'summary';
1065                 } else {
1066                         $action = 'project_list';
1067                 }
1068         }
1069         if (!defined($actions{$action})) {
1070                 die_error(400, "Unknown action");
1071         }
1072         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1073             !$project) {
1074                 die_error(400, "Project needed");
1075         }
1076         $actions{$action}->();
1077 }
1078
1079 sub reset_timer {
1080         our $t0 = [ gettimeofday() ]
1081                 if defined $t0;
1082         our $number_of_git_cmds = 0;
1083 }
1084
1085 sub run_request {
1086         reset_timer();
1087
1088         evaluate_uri();
1089         evaluate_gitweb_config();
1090         evaluate_git_version();
1091         check_loadavg();
1092
1093         # $projectroot and $projects_list might be set in gitweb config file
1094         $projects_list ||= $projectroot;
1095
1096         evaluate_query_params();
1097         evaluate_path_info();
1098         evaluate_and_validate_params();
1099         evaluate_git_dir();
1100
1101         configure_gitweb_features();
1102
1103         dispatch();
1104 }
1105
1106 our $is_last_request = sub { 1 };
1107 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1108 our $CGI = 'CGI';
1109 our $cgi;
1110 sub configure_as_fcgi {
1111         require CGI::Fast;
1112         our $CGI = 'CGI::Fast';
1113
1114         my $request_number = 0;
1115         # let each child service 100 requests
1116         our $is_last_request = sub { ++$request_number > 100 };
1117 }
1118 sub evaluate_argv {
1119         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1120         configure_as_fcgi()
1121                 if $script_name =~ /\.fcgi$/;
1122
1123         return unless (@ARGV);
1124
1125         require Getopt::Long;
1126         Getopt::Long::GetOptions(
1127                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1128                 'nproc|n=i' => sub {
1129                         my ($arg, $val) = @_;
1130                         return unless eval { require FCGI::ProcManager; 1; };
1131                         my $proc_manager = FCGI::ProcManager->new({
1132                                 n_processes => $val,
1133                         });
1134                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1135                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1136                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1137                 },
1138         );
1139 }
1140
1141 sub run {
1142         evaluate_argv();
1143
1144         $pre_listen_hook->()
1145                 if $pre_listen_hook;
1146
1147  REQUEST:
1148         while ($cgi = $CGI->new()) {
1149                 $pre_dispatch_hook->()
1150                         if $pre_dispatch_hook;
1151
1152                 run_request();
1153
1154                 $post_dispatch_hook->()
1155                         if $post_dispatch_hook;
1156
1157                 last REQUEST if ($is_last_request->());
1158         }
1159
1160  DONE_GITWEB:
1161         1;
1162 }
1163
1164 run();
1165
1166 if (defined caller) {
1167         # wrapped in a subroutine processing requests,
1168         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1169         return;
1170 } else {
1171         # pure CGI script, serving single request
1172         exit;
1173 }
1174
1175 ## ======================================================================
1176 ## action links
1177
1178 # possible values of extra options
1179 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1180 # -replay => 1      - start from a current view (replay with modifications)
1181 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1182 sub href {
1183         my %params = @_;
1184         # default is to use -absolute url() i.e. $my_uri
1185         my $href = $params{-full} ? $my_url : $my_uri;
1186
1187         $params{'project'} = $project unless exists $params{'project'};
1188
1189         if ($params{-replay}) {
1190                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1191                         if (!exists $params{$name}) {
1192                                 $params{$name} = $input_params{$name};
1193                         }
1194                 }
1195         }
1196
1197         my $use_pathinfo = gitweb_check_feature('pathinfo');
1198         if (defined $params{'project'} &&
1199             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1200                 # try to put as many parameters as possible in PATH_INFO:
1201                 #   - project name
1202                 #   - action
1203                 #   - hash_parent or hash_parent_base:/file_parent
1204                 #   - hash or hash_base:/filename
1205                 #   - the snapshot_format as an appropriate suffix
1206
1207                 # When the script is the root DirectoryIndex for the domain,
1208                 # $href here would be something like http://gitweb.example.com/
1209                 # Thus, we strip any trailing / from $href, to spare us double
1210                 # slashes in the final URL
1211                 $href =~ s,/$,,;
1212
1213                 # Then add the project name, if present
1214                 $href .= "/".esc_url($params{'project'});
1215                 delete $params{'project'};
1216
1217                 # since we destructively absorb parameters, we keep this
1218                 # boolean that remembers if we're handling a snapshot
1219                 my $is_snapshot = $params{'action'} eq 'snapshot';
1220
1221                 # Summary just uses the project path URL, any other action is
1222                 # added to the URL
1223                 if (defined $params{'action'}) {
1224                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1225                         delete $params{'action'};
1226                 }
1227
1228                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1229                 # stripping nonexistent or useless pieces
1230                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1231                         || $params{'hash_parent'} || $params{'hash'});
1232                 if (defined $params{'hash_base'}) {
1233                         if (defined $params{'hash_parent_base'}) {
1234                                 $href .= esc_url($params{'hash_parent_base'});
1235                                 # skip the file_parent if it's the same as the file_name
1236                                 if (defined $params{'file_parent'}) {
1237                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1238                                                 delete $params{'file_parent'};
1239                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1240                                                 $href .= ":/".esc_url($params{'file_parent'});
1241                                                 delete $params{'file_parent'};
1242                                         }
1243                                 }
1244                                 $href .= "..";
1245                                 delete $params{'hash_parent'};
1246                                 delete $params{'hash_parent_base'};
1247                         } elsif (defined $params{'hash_parent'}) {
1248                                 $href .= esc_url($params{'hash_parent'}). "..";
1249                                 delete $params{'hash_parent'};
1250                         }
1251
1252                         $href .= esc_url($params{'hash_base'});
1253                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1254                                 $href .= ":/".esc_url($params{'file_name'});
1255                                 delete $params{'file_name'};
1256                         }
1257                         delete $params{'hash'};
1258                         delete $params{'hash_base'};
1259                 } elsif (defined $params{'hash'}) {
1260                         $href .= esc_url($params{'hash'});
1261                         delete $params{'hash'};
1262                 }
1263
1264                 # If the action was a snapshot, we can absorb the
1265                 # snapshot_format parameter too
1266                 if ($is_snapshot) {
1267                         my $fmt = $params{'snapshot_format'};
1268                         # snapshot_format should always be defined when href()
1269                         # is called, but just in case some code forgets, we
1270                         # fall back to the default
1271                         $fmt ||= $snapshot_fmts[0];
1272                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1273                         delete $params{'snapshot_format'};
1274                 }
1275         }
1276
1277         # now encode the parameters explicitly
1278         my @result = ();
1279         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1280                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1281                 if (defined $params{$name}) {
1282                         if (ref($params{$name}) eq "ARRAY") {
1283                                 foreach my $par (@{$params{$name}}) {
1284                                         push @result, $symbol . "=" . esc_param($par);
1285                                 }
1286                         } else {
1287                                 push @result, $symbol . "=" . esc_param($params{$name});
1288                         }
1289                 }
1290         }
1291         $href .= "?" . join(';', @result) if scalar @result;
1292
1293         return $href;
1294 }
1295
1296
1297 ## ======================================================================
1298 ## validation, quoting/unquoting and escaping
1299
1300 sub validate_action {
1301         my $input = shift || return undef;
1302         return undef unless exists $actions{$input};
1303         return $input;
1304 }
1305
1306 sub validate_project {
1307         my $input = shift || return undef;
1308         if (!validate_pathname($input) ||
1309                 !(-d "$projectroot/$input") ||
1310                 !check_export_ok("$projectroot/$input") ||
1311                 ($strict_export && !project_in_list($input))) {
1312                 return undef;
1313         } else {
1314                 return $input;
1315         }
1316 }
1317
1318 sub validate_pathname {
1319         my $input = shift || return undef;
1320
1321         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1322         # at the beginning, at the end, and between slashes.
1323         # also this catches doubled slashes
1324         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1325                 return undef;
1326         }
1327         # no null characters
1328         if ($input =~ m!\0!) {
1329                 return undef;
1330         }
1331         return $input;
1332 }
1333
1334 sub validate_refname {
1335         my $input = shift || return undef;
1336
1337         # textual hashes are O.K.
1338         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1339                 return $input;
1340         }
1341         # it must be correct pathname
1342         $input = validate_pathname($input)
1343                 or return undef;
1344         # restrictions on ref name according to git-check-ref-format
1345         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1346                 return undef;
1347         }
1348         return $input;
1349 }
1350
1351 # decode sequences of octets in utf8 into Perl's internal form,
1352 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1353 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1354 sub to_utf8 {
1355         my $str = shift;
1356         return undef unless defined $str;
1357         if (utf8::valid($str)) {
1358                 utf8::decode($str);
1359                 return $str;
1360         } else {
1361                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1362         }
1363 }
1364
1365 # quote unsafe chars, but keep the slash, even when it's not
1366 # correct, but quoted slashes look too horrible in bookmarks
1367 sub esc_param {
1368         my $str = shift;
1369         return undef unless defined $str;
1370         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1371         $str =~ s/ /\+/g;
1372         return $str;
1373 }
1374
1375 # quote unsafe chars in whole URL, so some characters cannot be quoted
1376 sub esc_url {
1377         my $str = shift;
1378         return undef unless defined $str;
1379         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1380         $str =~ s/ /\+/g;
1381         return $str;
1382 }
1383
1384 # replace invalid utf8 character with SUBSTITUTION sequence
1385 sub esc_html {
1386         my $str = shift;
1387         my %opts = @_;
1388
1389         return undef unless defined $str;
1390
1391         $str = to_utf8($str);
1392         $str = $cgi->escapeHTML($str);
1393         if ($opts{'-nbsp'}) {
1394                 $str =~ s/ /&nbsp;/g;
1395         }
1396         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1397         return $str;
1398 }
1399
1400 # quote control characters and escape filename to HTML
1401 sub esc_path {
1402         my $str = shift;
1403         my %opts = @_;
1404
1405         return undef unless defined $str;
1406
1407         $str = to_utf8($str);
1408         $str = $cgi->escapeHTML($str);
1409         if ($opts{'-nbsp'}) {
1410                 $str =~ s/ /&nbsp;/g;
1411         }
1412         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1413         return $str;
1414 }
1415
1416 # Make control characters "printable", using character escape codes (CEC)
1417 sub quot_cec {
1418         my $cntrl = shift;
1419         my %opts = @_;
1420         my %es = ( # character escape codes, aka escape sequences
1421                 "\t" => '\t',   # tab            (HT)
1422                 "\n" => '\n',   # line feed      (LF)
1423                 "\r" => '\r',   # carrige return (CR)
1424                 "\f" => '\f',   # form feed      (FF)
1425                 "\b" => '\b',   # backspace      (BS)
1426                 "\a" => '\a',   # alarm (bell)   (BEL)
1427                 "\e" => '\e',   # escape         (ESC)
1428                 "\013" => '\v', # vertical tab   (VT)
1429                 "\000" => '\0', # nul character  (NUL)
1430         );
1431         my $chr = ( (exists $es{$cntrl})
1432                     ? $es{$cntrl}
1433                     : sprintf('\%2x', ord($cntrl)) );
1434         if ($opts{-nohtml}) {
1435                 return $chr;
1436         } else {
1437                 return "<span class=\"cntrl\">$chr</span>";
1438         }
1439 }
1440
1441 # Alternatively use unicode control pictures codepoints,
1442 # Unicode "printable representation" (PR)
1443 sub quot_upr {
1444         my $cntrl = shift;
1445         my %opts = @_;
1446
1447         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1448         if ($opts{-nohtml}) {
1449                 return $chr;
1450         } else {
1451                 return "<span class=\"cntrl\">$chr</span>";
1452         }
1453 }
1454
1455 # git may return quoted and escaped filenames
1456 sub unquote {
1457         my $str = shift;
1458
1459         sub unq {
1460                 my $seq = shift;
1461                 my %es = ( # character escape codes, aka escape sequences
1462                         't' => "\t",   # tab            (HT, TAB)
1463                         'n' => "\n",   # newline        (NL)
1464                         'r' => "\r",   # return         (CR)
1465                         'f' => "\f",   # form feed      (FF)
1466                         'b' => "\b",   # backspace      (BS)
1467                         'a' => "\a",   # alarm (bell)   (BEL)
1468                         'e' => "\e",   # escape         (ESC)
1469                         'v' => "\013", # vertical tab   (VT)
1470                 );
1471
1472                 if ($seq =~ m/^[0-7]{1,3}$/) {
1473                         # octal char sequence
1474                         return chr(oct($seq));
1475                 } elsif (exists $es{$seq}) {
1476                         # C escape sequence, aka character escape code
1477                         return $es{$seq};
1478                 }
1479                 # quoted ordinary character
1480                 return $seq;
1481         }
1482
1483         if ($str =~ m/^"(.*)"$/) {
1484                 # needs unquoting
1485                 $str = $1;
1486                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1487         }
1488         return $str;
1489 }
1490
1491 # escape tabs (convert tabs to spaces)
1492 sub untabify {
1493         my $line = shift;
1494
1495         while ((my $pos = index($line, "\t")) != -1) {
1496                 if (my $count = (8 - ($pos % 8))) {
1497                         my $spaces = ' ' x $count;
1498                         $line =~ s/\t/$spaces/;
1499                 }
1500         }
1501
1502         return $line;
1503 }
1504
1505 sub project_in_list {
1506         my $project = shift;
1507         my @list = git_get_projects_list();
1508         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1509 }
1510
1511 ## ----------------------------------------------------------------------
1512 ## HTML aware string manipulation
1513
1514 # Try to chop given string on a word boundary between position
1515 # $len and $len+$add_len. If there is no word boundary there,
1516 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1517 # (marking chopped part) would be longer than given string.
1518 sub chop_str {
1519         my $str = shift;
1520         my $len = shift;
1521         my $add_len = shift || 10;
1522         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1523
1524         # Make sure perl knows it is utf8 encoded so we don't
1525         # cut in the middle of a utf8 multibyte char.
1526         $str = to_utf8($str);
1527
1528         # allow only $len chars, but don't cut a word if it would fit in $add_len
1529         # if it doesn't fit, cut it if it's still longer than the dots we would add
1530         # remove chopped character entities entirely
1531
1532         # when chopping in the middle, distribute $len into left and right part
1533         # return early if chopping wouldn't make string shorter
1534         if ($where eq 'center') {
1535                 return $str if ($len + 5 >= length($str)); # filler is length 5
1536                 $len = int($len/2);
1537         } else {
1538                 return $str if ($len + 4 >= length($str)); # filler is length 4
1539         }
1540
1541         # regexps: ending and beginning with word part up to $add_len
1542         my $endre = qr/.{$len}\w{0,$add_len}/;
1543         my $begre = qr/\w{0,$add_len}.{$len}/;
1544
1545         if ($where eq 'left') {
1546                 $str =~ m/^(.*?)($begre)$/;
1547                 my ($lead, $body) = ($1, $2);
1548                 if (length($lead) > 4) {
1549                         $lead = " ...";
1550                 }
1551                 return "$lead$body";
1552
1553         } elsif ($where eq 'center') {
1554                 $str =~ m/^($endre)(.*)$/;
1555                 my ($left, $str)  = ($1, $2);
1556                 $str =~ m/^(.*?)($begre)$/;
1557                 my ($mid, $right) = ($1, $2);
1558                 if (length($mid) > 5) {
1559                         $mid = " ... ";
1560                 }
1561                 return "$left$mid$right";
1562
1563         } else {
1564                 $str =~ m/^($endre)(.*)$/;
1565                 my $body = $1;
1566                 my $tail = $2;
1567                 if (length($tail) > 4) {
1568                         $tail = "... ";
1569                 }
1570                 return "$body$tail";
1571         }
1572 }
1573
1574 # takes the same arguments as chop_str, but also wraps a <span> around the
1575 # result with a title attribute if it does get chopped. Additionally, the
1576 # string is HTML-escaped.
1577 sub chop_and_escape_str {
1578         my ($str) = @_;
1579
1580         my $chopped = chop_str(@_);
1581         if ($chopped eq $str) {
1582                 return esc_html($chopped);
1583         } else {
1584                 $str =~ s/[[:cntrl:]]/?/g;
1585                 return $cgi->span({-title=>$str}, esc_html($chopped));
1586         }
1587 }
1588
1589 ## ----------------------------------------------------------------------
1590 ## functions returning short strings
1591
1592 # CSS class for given age value (in seconds)
1593 sub age_class {
1594         my $age = shift;
1595
1596         if (!defined $age) {
1597                 return "noage";
1598         } elsif ($age < 60*60*2) {
1599                 return "age0";
1600         } elsif ($age < 60*60*24*2) {
1601                 return "age1";
1602         } else {
1603                 return "age2";
1604         }
1605 }
1606
1607 # convert age in seconds to "nn units ago" string
1608 sub age_string {
1609         my $age = shift;
1610         my $age_str;
1611
1612         if ($age > 60*60*24*365*2) {
1613                 $age_str = (int $age/60/60/24/365);
1614                 $age_str .= " years ago";
1615         } elsif ($age > 60*60*24*(365/12)*2) {
1616                 $age_str = int $age/60/60/24/(365/12);
1617                 $age_str .= " months ago";
1618         } elsif ($age > 60*60*24*7*2) {
1619                 $age_str = int $age/60/60/24/7;
1620                 $age_str .= " weeks ago";
1621         } elsif ($age > 60*60*24*2) {
1622                 $age_str = int $age/60/60/24;
1623                 $age_str .= " days ago";
1624         } elsif ($age > 60*60*2) {
1625                 $age_str = int $age/60/60;
1626                 $age_str .= " hours ago";
1627         } elsif ($age > 60*2) {
1628                 $age_str = int $age/60;
1629                 $age_str .= " min ago";
1630         } elsif ($age > 2) {
1631                 $age_str = int $age;
1632                 $age_str .= " sec ago";
1633         } else {
1634                 $age_str .= " right now";
1635         }
1636         return $age_str;
1637 }
1638
1639 use constant {
1640         S_IFINVALID => 0030000,
1641         S_IFGITLINK => 0160000,
1642 };
1643
1644 # submodule/subproject, a commit object reference
1645 sub S_ISGITLINK {
1646         my $mode = shift;
1647
1648         return (($mode & S_IFMT) == S_IFGITLINK)
1649 }
1650
1651 # convert file mode in octal to symbolic file mode string
1652 sub mode_str {
1653         my $mode = oct shift;
1654
1655         if (S_ISGITLINK($mode)) {
1656                 return 'm---------';
1657         } elsif (S_ISDIR($mode & S_IFMT)) {
1658                 return 'drwxr-xr-x';
1659         } elsif (S_ISLNK($mode)) {
1660                 return 'lrwxrwxrwx';
1661         } elsif (S_ISREG($mode)) {
1662                 # git cares only about the executable bit
1663                 if ($mode & S_IXUSR) {
1664                         return '-rwxr-xr-x';
1665                 } else {
1666                         return '-rw-r--r--';
1667                 };
1668         } else {
1669                 return '----------';
1670         }
1671 }
1672
1673 # convert file mode in octal to file type string
1674 sub file_type {
1675         my $mode = shift;
1676
1677         if ($mode !~ m/^[0-7]+$/) {
1678                 return $mode;
1679         } else {
1680                 $mode = oct $mode;
1681         }
1682
1683         if (S_ISGITLINK($mode)) {
1684                 return "submodule";
1685         } elsif (S_ISDIR($mode & S_IFMT)) {
1686                 return "directory";
1687         } elsif (S_ISLNK($mode)) {
1688                 return "symlink";
1689         } elsif (S_ISREG($mode)) {
1690                 return "file";
1691         } else {
1692                 return "unknown";
1693         }
1694 }
1695
1696 # convert file mode in octal to file type description string
1697 sub file_type_long {
1698         my $mode = shift;
1699
1700         if ($mode !~ m/^[0-7]+$/) {
1701                 return $mode;
1702         } else {
1703                 $mode = oct $mode;
1704         }
1705
1706         if (S_ISGITLINK($mode)) {
1707                 return "submodule";
1708         } elsif (S_ISDIR($mode & S_IFMT)) {
1709                 return "directory";
1710         } elsif (S_ISLNK($mode)) {
1711                 return "symlink";
1712         } elsif (S_ISREG($mode)) {
1713                 if ($mode & S_IXUSR) {
1714                         return "executable";
1715                 } else {
1716                         return "file";
1717                 };
1718         } else {
1719                 return "unknown";
1720         }
1721 }
1722
1723
1724 ## ----------------------------------------------------------------------
1725 ## functions returning short HTML fragments, or transforming HTML fragments
1726 ## which don't belong to other sections
1727
1728 # format line of commit message.
1729 sub format_log_line_html {
1730         my $line = shift;
1731
1732         $line = esc_html($line, -nbsp=>1);
1733         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1734                 $cgi->a({-href => href(action=>"object", hash=>$1),
1735                                         -class => "text"}, $1);
1736         }eg;
1737
1738         return $line;
1739 }
1740
1741 # format marker of refs pointing to given object
1742
1743 # the destination action is chosen based on object type and current context:
1744 # - for annotated tags, we choose the tag view unless it's the current view
1745 #   already, in which case we go to shortlog view
1746 # - for other refs, we keep the current view if we're in history, shortlog or
1747 #   log view, and select shortlog otherwise
1748 sub format_ref_marker {
1749         my ($refs, $id) = @_;
1750         my $markers = '';
1751
1752         if (defined $refs->{$id}) {
1753                 foreach my $ref (@{$refs->{$id}}) {
1754                         # this code exploits the fact that non-lightweight tags are the
1755                         # only indirect objects, and that they are the only objects for which
1756                         # we want to use tag instead of shortlog as action
1757                         my ($type, $name) = qw();
1758                         my $indirect = ($ref =~ s/\^\{\}$//);
1759                         # e.g. tags/v2.6.11 or heads/next
1760                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1761                                 $type = $1;
1762                                 $name = $2;
1763                         } else {
1764                                 $type = "ref";
1765                                 $name = $ref;
1766                         }
1767
1768                         my $class = $type;
1769                         $class .= " indirect" if $indirect;
1770
1771                         my $dest_action = "shortlog";
1772
1773                         if ($indirect) {
1774                                 $dest_action = "tag" unless $action eq "tag";
1775                         } elsif ($action =~ /^(history|(short)?log)$/) {
1776                                 $dest_action = $action;
1777                         }
1778
1779                         my $dest = "";
1780                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1781                         $dest .= $ref;
1782
1783                         my $link = $cgi->a({
1784                                 -href => href(
1785                                         action=>$dest_action,
1786                                         hash=>$dest
1787                                 )}, $name);
1788
1789                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1790                                 $link . "</span>";
1791                 }
1792         }
1793
1794         if ($markers) {
1795                 return ' <span class="refs">'. $markers . '</span>';
1796         } else {
1797                 return "";
1798         }
1799 }
1800
1801 # format, perhaps shortened and with markers, title line
1802 sub format_subject_html {
1803         my ($long, $short, $href, $extra) = @_;
1804         $extra = '' unless defined($extra);
1805
1806         if (length($short) < length($long)) {
1807                 $long =~ s/[[:cntrl:]]/?/g;
1808                 return $cgi->a({-href => $href, -class => "list subject",
1809                                 -title => to_utf8($long)},
1810                        esc_html($short)) . $extra;
1811         } else {
1812                 return $cgi->a({-href => $href, -class => "list subject"},
1813                        esc_html($long)) . $extra;
1814         }
1815 }
1816
1817 # Rather than recomputing the url for an email multiple times, we cache it
1818 # after the first hit. This gives a visible benefit in views where the avatar
1819 # for the same email is used repeatedly (e.g. shortlog).
1820 # The cache is shared by all avatar engines (currently gravatar only), which
1821 # are free to use it as preferred. Since only one avatar engine is used for any
1822 # given page, there's no risk for cache conflicts.
1823 our %avatar_cache = ();
1824
1825 # Compute the picon url for a given email, by using the picon search service over at
1826 # http://www.cs.indiana.edu/picons/search.html
1827 sub picon_url {
1828         my $email = lc shift;
1829         if (!$avatar_cache{$email}) {
1830                 my ($user, $domain) = split('@', $email);
1831                 $avatar_cache{$email} =
1832                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1833                         "$domain/$user/" .
1834                         "users+domains+unknown/up/single";
1835         }
1836         return $avatar_cache{$email};
1837 }
1838
1839 # Compute the gravatar url for a given email, if it's not in the cache already.
1840 # Gravatar stores only the part of the URL before the size, since that's the
1841 # one computationally more expensive. This also allows reuse of the cache for
1842 # different sizes (for this particular engine).
1843 sub gravatar_url {
1844         my $email = lc shift;
1845         my $size = shift;
1846         $avatar_cache{$email} ||=
1847                 "http://www.gravatar.com/avatar/" .
1848                         Digest::MD5::md5_hex($email) . "?s=";
1849         return $avatar_cache{$email} . $size;
1850 }
1851
1852 # Insert an avatar for the given $email at the given $size if the feature
1853 # is enabled.
1854 sub git_get_avatar {
1855         my ($email, %opts) = @_;
1856         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1857         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1858         $opts{-size} ||= 'default';
1859         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1860         my $url = "";
1861         if ($git_avatar eq 'gravatar') {
1862                 $url = gravatar_url($email, $size);
1863         } elsif ($git_avatar eq 'picon') {
1864                 $url = picon_url($email);
1865         }
1866         # Other providers can be added by extending the if chain, defining $url
1867         # as needed. If no variant puts something in $url, we assume avatars
1868         # are completely disabled/unavailable.
1869         if ($url) {
1870                 return $pre_white .
1871                        "<img width=\"$size\" " .
1872                             "class=\"avatar\" " .
1873                             "src=\"$url\" " .
1874                             "alt=\"\" " .
1875                        "/>" . $post_white;
1876         } else {
1877                 return "";
1878         }
1879 }
1880
1881 sub format_search_author {
1882         my ($author, $searchtype, $displaytext) = @_;
1883         my $have_search = gitweb_check_feature('search');
1884
1885         if ($have_search) {
1886                 my $performed = "";
1887                 if ($searchtype eq 'author') {
1888                         $performed = "authored";
1889                 } elsif ($searchtype eq 'committer') {
1890                         $performed = "committed";
1891                 }
1892
1893                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1894                                 searchtext=>$author,
1895                                 searchtype=>$searchtype), class=>"list",
1896                                 title=>"Search for commits $performed by $author"},
1897                                 $displaytext);
1898
1899         } else {
1900                 return $displaytext;
1901         }
1902 }
1903
1904 # format the author name of the given commit with the given tag
1905 # the author name is chopped and escaped according to the other
1906 # optional parameters (see chop_str).
1907 sub format_author_html {
1908         my $tag = shift;
1909         my $co = shift;
1910         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1911         return "<$tag class=\"author\">" .
1912                format_search_author($co->{'author_name'}, "author",
1913                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1914                        $author) .
1915                "</$tag>";
1916 }
1917
1918 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1919 sub format_git_diff_header_line {
1920         my $line = shift;
1921         my $diffinfo = shift;
1922         my ($from, $to) = @_;
1923
1924         if ($diffinfo->{'nparents'}) {
1925                 # combined diff
1926                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1927                 if ($to->{'href'}) {
1928                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1929                                          esc_path($to->{'file'}));
1930                 } else { # file was deleted (no href)
1931                         $line .= esc_path($to->{'file'});
1932                 }
1933         } else {
1934                 # "ordinary" diff
1935                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1936                 if ($from->{'href'}) {
1937                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1938                                          'a/' . esc_path($from->{'file'}));
1939                 } else { # file was added (no href)
1940                         $line .= 'a/' . esc_path($from->{'file'});
1941                 }
1942                 $line .= ' ';
1943                 if ($to->{'href'}) {
1944                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1945                                          'b/' . esc_path($to->{'file'}));
1946                 } else { # file was deleted
1947                         $line .= 'b/' . esc_path($to->{'file'});
1948                 }
1949         }
1950
1951         return "<div class=\"diff header\">$line</div>\n";
1952 }
1953
1954 # format extended diff header line, before patch itself
1955 sub format_extended_diff_header_line {
1956         my $line = shift;
1957         my $diffinfo = shift;
1958         my ($from, $to) = @_;
1959
1960         # match <path>
1961         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1962                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1963                                        esc_path($from->{'file'}));
1964         }
1965         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1966                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1967                                  esc_path($to->{'file'}));
1968         }
1969         # match single <mode>
1970         if ($line =~ m/\s(\d{6})$/) {
1971                 $line .= '<span class="info"> (' .
1972                          file_type_long($1) .
1973                          ')</span>';
1974         }
1975         # match <hash>
1976         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1977                 # can match only for combined diff
1978                 $line = 'index ';
1979                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1980                         if ($from->{'href'}[$i]) {
1981                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1982                                                   -class=>"hash"},
1983                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1984                         } else {
1985                                 $line .= '0' x 7;
1986                         }
1987                         # separator
1988                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1989                 }
1990                 $line .= '..';
1991                 if ($to->{'href'}) {
1992                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1993                                          substr($diffinfo->{'to_id'},0,7));
1994                 } else {
1995                         $line .= '0' x 7;
1996                 }
1997
1998         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1999                 # can match only for ordinary diff
2000                 my ($from_link, $to_link);
2001                 if ($from->{'href'}) {
2002                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2003                                              substr($diffinfo->{'from_id'},0,7));
2004                 } else {
2005                         $from_link = '0' x 7;
2006                 }
2007                 if ($to->{'href'}) {
2008                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2009                                            substr($diffinfo->{'to_id'},0,7));
2010                 } else {
2011                         $to_link = '0' x 7;
2012                 }
2013                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2014                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2015         }
2016
2017         return $line . "<br/>\n";
2018 }
2019
2020 # format from-file/to-file diff header
2021 sub format_diff_from_to_header {
2022         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2023         my $line;
2024         my $result = '';
2025
2026         $line = $from_line;
2027         #assert($line =~ m/^---/) if DEBUG;
2028         # no extra formatting for "^--- /dev/null"
2029         if (! $diffinfo->{'nparents'}) {
2030                 # ordinary (single parent) diff
2031                 if ($line =~ m!^--- "?a/!) {
2032                         if ($from->{'href'}) {
2033                                 $line = '--- a/' .
2034                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2035                                                 esc_path($from->{'file'}));
2036                         } else {
2037                                 $line = '--- a/' .
2038                                         esc_path($from->{'file'});
2039                         }
2040                 }
2041                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2042
2043         } else {
2044                 # combined diff (merge commit)
2045                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2046                         if ($from->{'href'}[$i]) {
2047                                 $line = '--- ' .
2048                                         $cgi->a({-href=>href(action=>"blobdiff",
2049                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2050                                                              hash_parent_base=>$parents[$i],
2051                                                              file_parent=>$from->{'file'}[$i],
2052                                                              hash=>$diffinfo->{'to_id'},
2053                                                              hash_base=>$hash,
2054                                                              file_name=>$to->{'file'}),
2055                                                  -class=>"path",
2056                                                  -title=>"diff" . ($i+1)},
2057                                                 $i+1) .
2058                                         '/' .
2059                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2060                                                 esc_path($from->{'file'}[$i]));
2061                         } else {
2062                                 $line = '--- /dev/null';
2063                         }
2064                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2065                 }
2066         }
2067
2068         $line = $to_line;
2069         #assert($line =~ m/^\+\+\+/) if DEBUG;
2070         # no extra formatting for "^+++ /dev/null"
2071         if ($line =~ m!^\+\+\+ "?b/!) {
2072                 if ($to->{'href'}) {
2073                         $line = '+++ b/' .
2074                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2075                                         esc_path($to->{'file'}));
2076                 } else {
2077                         $line = '+++ b/' .
2078                                 esc_path($to->{'file'});
2079                 }
2080         }
2081         $result .= qq!<div class="diff to_file">$line</div>\n!;
2082
2083         return $result;
2084 }
2085
2086 # create note for patch simplified by combined diff
2087 sub format_diff_cc_simplified {
2088         my ($diffinfo, @parents) = @_;
2089         my $result = '';
2090
2091         $result .= "<div class=\"diff header\">" .
2092                    "diff --cc ";
2093         if (!is_deleted($diffinfo)) {
2094                 $result .= $cgi->a({-href => href(action=>"blob",
2095                                                   hash_base=>$hash,
2096                                                   hash=>$diffinfo->{'to_id'},
2097                                                   file_name=>$diffinfo->{'to_file'}),
2098                                     -class => "path"},
2099                                    esc_path($diffinfo->{'to_file'}));
2100         } else {
2101                 $result .= esc_path($diffinfo->{'to_file'});
2102         }
2103         $result .= "</div>\n" . # class="diff header"
2104                    "<div class=\"diff nodifferences\">" .
2105                    "Simple merge" .
2106                    "</div>\n"; # class="diff nodifferences"
2107
2108         return $result;
2109 }
2110
2111 # format patch (diff) line (not to be used for diff headers)
2112 sub format_diff_line {
2113         my $line = shift;
2114         my ($from, $to) = @_;
2115         my $diff_class = "";
2116
2117         chomp $line;
2118
2119         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2120                 # combined diff
2121                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2122                 if ($line =~ m/^\@{3}/) {
2123                         $diff_class = " chunk_header";
2124                 } elsif ($line =~ m/^\\/) {
2125                         $diff_class = " incomplete";
2126                 } elsif ($prefix =~ tr/+/+/) {
2127                         $diff_class = " add";
2128                 } elsif ($prefix =~ tr/-/-/) {
2129                         $diff_class = " rem";
2130                 }
2131         } else {
2132                 # assume ordinary diff
2133                 my $char = substr($line, 0, 1);
2134                 if ($char eq '+') {
2135                         $diff_class = " add";
2136                 } elsif ($char eq '-') {
2137                         $diff_class = " rem";
2138                 } elsif ($char eq '@') {
2139                         $diff_class = " chunk_header";
2140                 } elsif ($char eq "\\") {
2141                         $diff_class = " incomplete";
2142                 }
2143         }
2144         $line = untabify($line);
2145         if ($from && $to && $line =~ m/^\@{2} /) {
2146                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2147                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2148
2149                 $from_lines = 0 unless defined $from_lines;
2150                 $to_lines   = 0 unless defined $to_lines;
2151
2152                 if ($from->{'href'}) {
2153                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2154                                              -class=>"list"}, $from_text);
2155                 }
2156                 if ($to->{'href'}) {
2157                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2158                                              -class=>"list"}, $to_text);
2159                 }
2160                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2161                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2162                 return "<div class=\"diff$diff_class\">$line</div>\n";
2163         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2164                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2165                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2166
2167                 @from_text = split(' ', $ranges);
2168                 for (my $i = 0; $i < @from_text; ++$i) {
2169                         ($from_start[$i], $from_nlines[$i]) =
2170                                 (split(',', substr($from_text[$i], 1)), 0);
2171                 }
2172
2173                 $to_text   = pop @from_text;
2174                 $to_start  = pop @from_start;
2175                 $to_nlines = pop @from_nlines;
2176
2177                 $line = "<span class=\"chunk_info\">$prefix ";
2178                 for (my $i = 0; $i < @from_text; ++$i) {
2179                         if ($from->{'href'}[$i]) {
2180                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2181                                                   -class=>"list"}, $from_text[$i]);
2182                         } else {
2183                                 $line .= $from_text[$i];
2184                         }
2185                         $line .= " ";
2186                 }
2187                 if ($to->{'href'}) {
2188                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2189                                           -class=>"list"}, $to_text);
2190                 } else {
2191                         $line .= $to_text;
2192                 }
2193                 $line .= " $prefix</span>" .
2194                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2195                 return "<div class=\"diff$diff_class\">$line</div>\n";
2196         }
2197         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2198 }
2199
2200 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2201 # linked.  Pass the hash of the tree/commit to snapshot.
2202 sub format_snapshot_links {
2203         my ($hash) = @_;
2204         my $num_fmts = @snapshot_fmts;
2205         if ($num_fmts > 1) {
2206                 # A parenthesized list of links bearing format names.
2207                 # e.g. "snapshot (_tar.gz_ _zip_)"
2208                 return "snapshot (" . join(' ', map
2209                         $cgi->a({
2210                                 -href => href(
2211                                         action=>"snapshot",
2212                                         hash=>$hash,
2213                                         snapshot_format=>$_
2214                                 )
2215                         }, $known_snapshot_formats{$_}{'display'})
2216                 , @snapshot_fmts) . ")";
2217         } elsif ($num_fmts == 1) {
2218                 # A single "snapshot" link whose tooltip bears the format name.
2219                 # i.e. "_snapshot_"
2220                 my ($fmt) = @snapshot_fmts;
2221                 return
2222                         $cgi->a({
2223                                 -href => href(
2224                                         action=>"snapshot",
2225                                         hash=>$hash,
2226                                         snapshot_format=>$fmt
2227                                 ),
2228                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2229                         }, "snapshot");
2230         } else { # $num_fmts == 0
2231                 return undef;
2232         }
2233 }
2234
2235 ## ......................................................................
2236 ## functions returning values to be passed, perhaps after some
2237 ## transformation, to other functions; e.g. returning arguments to href()
2238
2239 # returns hash to be passed to href to generate gitweb URL
2240 # in -title key it returns description of link
2241 sub get_feed_info {
2242         my $format = shift || 'Atom';
2243         my %res = (action => lc($format));
2244
2245         # feed links are possible only for project views
2246         return unless (defined $project);
2247         # some views should link to OPML, or to generic project feed,
2248         # or don't have specific feed yet (so they should use generic)
2249         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2250
2251         my $branch;
2252         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2253         # from tag links; this also makes possible to detect branch links
2254         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2255             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2256                 $branch = $1;
2257         }
2258         # find log type for feed description (title)
2259         my $type = 'log';
2260         if (defined $file_name) {
2261                 $type  = "history of $file_name";
2262                 $type .= "/" if ($action eq 'tree');
2263                 $type .= " on '$branch'" if (defined $branch);
2264         } else {
2265                 $type = "log of $branch" if (defined $branch);
2266         }
2267
2268         $res{-title} = $type;
2269         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2270         $res{'file_name'} = $file_name;
2271
2272         return %res;
2273 }
2274
2275 ## ----------------------------------------------------------------------
2276 ## git utility subroutines, invoking git commands
2277
2278 # returns path to the core git executable and the --git-dir parameter as list
2279 sub git_cmd {
2280         $number_of_git_cmds++;
2281         return $GIT, '--git-dir='.$git_dir;
2282 }
2283
2284 # quote the given arguments for passing them to the shell
2285 # quote_command("command", "arg 1", "arg with ' and ! characters")
2286 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2287 # Try to avoid using this function wherever possible.
2288 sub quote_command {
2289         return join(' ',
2290                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2291 }
2292
2293 # get HEAD ref of given project as hash
2294 sub git_get_head_hash {
2295         return git_get_full_hash(shift, 'HEAD');
2296 }
2297
2298 sub git_get_full_hash {
2299         return git_get_hash(@_);
2300 }
2301
2302 sub git_get_short_hash {
2303         return git_get_hash(@_, '--short=7');
2304 }
2305
2306 sub git_get_hash {
2307         my ($project, $hash, @options) = @_;
2308         my $o_git_dir = $git_dir;
2309         my $retval = undef;
2310         $git_dir = "$projectroot/$project";
2311         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2312             '--verify', '-q', @options, $hash) {
2313                 $retval = <$fd>;
2314                 chomp $retval if defined $retval;
2315                 close $fd;
2316         }
2317         if (defined $o_git_dir) {
2318                 $git_dir = $o_git_dir;
2319         }
2320         return $retval;
2321 }
2322
2323 # get type of given object
2324 sub git_get_type {
2325         my $hash = shift;
2326
2327         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2328         my $type = <$fd>;
2329         close $fd or return;
2330         chomp $type;
2331         return $type;
2332 }
2333
2334 # repository configuration
2335 our $config_file = '';
2336 our %config;
2337
2338 # store multiple values for single key as anonymous array reference
2339 # single values stored directly in the hash, not as [ <value> ]
2340 sub hash_set_multi {
2341         my ($hash, $key, $value) = @_;
2342
2343         if (!exists $hash->{$key}) {
2344                 $hash->{$key} = $value;
2345         } elsif (!ref $hash->{$key}) {
2346                 $hash->{$key} = [ $hash->{$key}, $value ];
2347         } else {
2348                 push @{$hash->{$key}}, $value;
2349         }
2350 }
2351
2352 # return hash of git project configuration
2353 # optionally limited to some section, e.g. 'gitweb'
2354 sub git_parse_project_config {
2355         my $section_regexp = shift;
2356         my %config;
2357
2358         local $/ = "\0";
2359
2360         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2361                 or return;
2362
2363         while (my $keyval = <$fh>) {
2364                 chomp $keyval;
2365                 my ($key, $value) = split(/\n/, $keyval, 2);
2366
2367                 hash_set_multi(\%config, $key, $value)
2368                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2369         }
2370         close $fh;
2371
2372         return %config;
2373 }
2374
2375 # convert config value to boolean: 'true' or 'false'
2376 # no value, number > 0, 'true' and 'yes' values are true
2377 # rest of values are treated as false (never as error)
2378 sub config_to_bool {
2379         my $val = shift;
2380
2381         return 1 if !defined $val;             # section.key
2382
2383         # strip leading and trailing whitespace
2384         $val =~ s/^\s+//;
2385         $val =~ s/\s+$//;
2386
2387         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2388                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2389 }
2390
2391 # convert config value to simple decimal number
2392 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2393 # to be multiplied by 1024, 1048576, or 1073741824
2394 sub config_to_int {
2395         my $val = shift;
2396
2397         # strip leading and trailing whitespace
2398         $val =~ s/^\s+//;
2399         $val =~ s/\s+$//;
2400
2401         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2402                 $unit = lc($unit);
2403                 # unknown unit is treated as 1
2404                 return $num * ($unit eq 'g' ? 1073741824 :
2405                                $unit eq 'm' ?    1048576 :
2406                                $unit eq 'k' ?       1024 : 1);
2407         }
2408         return $val;
2409 }
2410
2411 # convert config value to array reference, if needed
2412 sub config_to_multi {
2413         my $val = shift;
2414
2415         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2416 }
2417
2418 sub git_get_project_config {
2419         my ($key, $type) = @_;
2420
2421         return unless defined $git_dir;
2422
2423         # key sanity check
2424         return unless ($key);
2425         $key =~ s/^gitweb\.//;
2426         return if ($key =~ m/\W/);
2427
2428         # type sanity check
2429         if (defined $type) {
2430                 $type =~ s/^--//;
2431                 $type = undef
2432                         unless ($type eq 'bool' || $type eq 'int');
2433         }
2434
2435         # get config
2436         if (!defined $config_file ||
2437             $config_file ne "$git_dir/config") {
2438                 %config = git_parse_project_config('gitweb');
2439                 $config_file = "$git_dir/config";
2440         }
2441
2442         # check if config variable (key) exists
2443         return unless exists $config{"gitweb.$key"};
2444
2445         # ensure given type
2446         if (!defined $type) {
2447                 return $config{"gitweb.$key"};
2448         } elsif ($type eq 'bool') {
2449                 # backward compatibility: 'git config --bool' returns true/false
2450                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2451         } elsif ($type eq 'int') {
2452                 return config_to_int($config{"gitweb.$key"});
2453         }
2454         return $config{"gitweb.$key"};
2455 }
2456
2457 # get hash of given path at given ref
2458 sub git_get_hash_by_path {
2459         my $base = shift;
2460         my $path = shift || return undef;
2461         my $type = shift;
2462
2463         $path =~ s,/+$,,;
2464
2465         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2466                 or die_error(500, "Open git-ls-tree failed");
2467         my $line = <$fd>;
2468         close $fd or return undef;
2469
2470         if (!defined $line) {
2471                 # there is no tree or hash given by $path at $base
2472                 return undef;
2473         }
2474
2475         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2476         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2477         if (defined $type && $type ne $2) {
2478                 # type doesn't match
2479                 return undef;
2480         }
2481         return $3;
2482 }
2483
2484 # get path of entry with given hash at given tree-ish (ref)
2485 # used to get 'from' filename for combined diff (merge commit) for renames
2486 sub git_get_path_by_hash {
2487         my $base = shift || return;
2488         my $hash = shift || return;
2489
2490         local $/ = "\0";
2491
2492         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2493                 or return undef;
2494         while (my $line = <$fd>) {
2495                 chomp $line;
2496
2497                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2498                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2499                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2500                         close $fd;
2501                         return $1;
2502                 }
2503         }
2504         close $fd;
2505         return undef;
2506 }
2507
2508 ## ......................................................................
2509 ## git utility functions, directly accessing git repository
2510
2511 sub git_get_project_description {
2512         my $path = shift;
2513
2514         $git_dir = "$projectroot/$path";
2515         open my $fd, '<', "$git_dir/description"
2516                 or return git_get_project_config('description');
2517         my $descr = <$fd>;
2518         close $fd;
2519         if (defined $descr) {
2520                 chomp $descr;
2521         }
2522         return $descr;
2523 }
2524
2525 sub git_get_project_ctags {
2526         my $path = shift;
2527         my $ctags = {};
2528
2529         $git_dir = "$projectroot/$path";
2530         opendir my $dh, "$git_dir/ctags"
2531                 or return $ctags;
2532         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2533                 open my $ct, '<', $_ or next;
2534                 my $val = <$ct>;
2535                 chomp $val;
2536                 close $ct;
2537                 my $ctag = $_; $ctag =~ s#.*/##;
2538                 $ctags->{$ctag} = $val;
2539         }
2540         closedir $dh;
2541         $ctags;
2542 }
2543
2544 sub git_populate_project_tagcloud {
2545         my $ctags = shift;
2546
2547         # First, merge different-cased tags; tags vote on casing
2548         my %ctags_lc;
2549         foreach (keys %$ctags) {
2550                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2551                 if (not $ctags_lc{lc $_}->{topcount}
2552                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2553                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2554                         $ctags_lc{lc $_}->{topname} = $_;
2555                 }
2556         }
2557
2558         my $cloud;
2559         if (eval { require HTML::TagCloud; 1; }) {
2560                 $cloud = HTML::TagCloud->new;
2561                 foreach (sort keys %ctags_lc) {
2562                         # Pad the title with spaces so that the cloud looks
2563                         # less crammed.
2564                         my $title = $ctags_lc{$_}->{topname};
2565                         $title =~ s/ /&nbsp;/g;
2566                         $title =~ s/^/&nbsp;/g;
2567                         $title =~ s/$/&nbsp;/g;
2568                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2569                 }
2570         } else {
2571                 $cloud = \%ctags_lc;
2572         }
2573         $cloud;
2574 }
2575
2576 sub git_show_project_tagcloud {
2577         my ($cloud, $count) = @_;
2578         print STDERR ref($cloud)."..\n";
2579         if (ref $cloud eq 'HTML::TagCloud') {
2580                 return $cloud->html_and_css($count);
2581         } else {
2582                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2583                 return '<p align="center">' . join (', ', map {
2584                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2585                 } splice(@tags, 0, $count)) . '</p>';
2586         }
2587 }
2588
2589 sub git_get_project_url_list {
2590         my $path = shift;
2591
2592         $git_dir = "$projectroot/$path";
2593         open my $fd, '<', "$git_dir/cloneurl"
2594                 or return wantarray ?
2595                 @{ config_to_multi(git_get_project_config('url')) } :
2596                    config_to_multi(git_get_project_config('url'));
2597         my @git_project_url_list = map { chomp; $_ } <$fd>;
2598         close $fd;
2599
2600         return wantarray ? @git_project_url_list : \@git_project_url_list;
2601 }
2602
2603 sub git_get_projects_list {
2604         my ($filter) = @_;
2605         my @list;
2606
2607         $filter ||= '';
2608         $filter =~ s/\.git$//;
2609
2610         my $check_forks = gitweb_check_feature('forks');
2611
2612         if (-d $projects_list) {
2613                 # search in directory
2614                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2615                 # remove the trailing "/"
2616                 $dir =~ s!/+$!!;
2617                 my $pfxlen = length("$dir");
2618                 my $pfxdepth = ($dir =~ tr!/!!);
2619
2620                 File::Find::find({
2621                         follow_fast => 1, # follow symbolic links
2622                         follow_skip => 2, # ignore duplicates
2623                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2624                         wanted => sub {
2625                                 # global variables
2626                                 our $project_maxdepth;
2627                                 our $projectroot;
2628                                 # skip project-list toplevel, if we get it.
2629                                 return if (m!^[/.]$!);
2630                                 # only directories can be git repositories
2631                                 return unless (-d $_);
2632                                 # don't traverse too deep (Find is super slow on os x)
2633                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2634                                         $File::Find::prune = 1;
2635                                         return;
2636                                 }
2637
2638                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2639                                 # we check related file in $projectroot
2640                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2641                                 if (check_export_ok("$projectroot/$path")) {
2642                                         push @list, { path => $path };
2643                                         $File::Find::prune = 1;
2644                                 }
2645                         },
2646                 }, "$dir");
2647
2648         } elsif (-f $projects_list) {
2649                 # read from file(url-encoded):
2650                 # 'git%2Fgit.git Linus+Torvalds'
2651                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2652                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2653                 my %paths;
2654                 open my $fd, '<', $projects_list or return;
2655         PROJECT:
2656                 while (my $line = <$fd>) {
2657                         chomp $line;
2658                         my ($path, $owner) = split ' ', $line;
2659                         $path = unescape($path);
2660                         $owner = unescape($owner);
2661                         if (!defined $path) {
2662                                 next;
2663                         }
2664                         if ($filter ne '') {
2665                                 # looking for forks;
2666                                 my $pfx = substr($path, 0, length($filter));
2667                                 if ($pfx ne $filter) {
2668                                         next PROJECT;
2669                                 }
2670                                 my $sfx = substr($path, length($filter));
2671                                 if ($sfx !~ /^\/.*\.git$/) {
2672                                         next PROJECT;
2673                                 }
2674                         } elsif ($check_forks) {
2675                         PATH:
2676                                 foreach my $filter (keys %paths) {
2677                                         # looking for forks;
2678                                         my $pfx = substr($path, 0, length($filter));
2679                                         if ($pfx ne $filter) {
2680                                                 next PATH;
2681                                         }
2682                                         my $sfx = substr($path, length($filter));
2683                                         if ($sfx !~ /^\/.*\.git$/) {
2684                                                 next PATH;
2685                                         }
2686                                         # is a fork, don't include it in
2687                                         # the list
2688                                         next PROJECT;
2689                                 }
2690                         }
2691                         if (check_export_ok("$projectroot/$path")) {
2692                                 my $pr = {
2693                                         path => $path,
2694                                         owner => to_utf8($owner),
2695                                 };
2696                                 push @list, $pr;
2697                                 (my $forks_path = $path) =~ s/\.git$//;
2698                                 $paths{$forks_path}++;
2699                         }
2700                 }
2701                 close $fd;
2702         }
2703         return @list;
2704 }
2705
2706 our $gitweb_project_owner = undef;
2707 sub git_get_project_list_from_file {
2708
2709         return if (defined $gitweb_project_owner);
2710
2711         $gitweb_project_owner = {};
2712         # read from file (url-encoded):
2713         # 'git%2Fgit.git Linus+Torvalds'
2714         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2715         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2716         if (-f $projects_list) {
2717                 open(my $fd, '<', $projects_list);
2718                 while (my $line = <$fd>) {
2719                         chomp $line;
2720                         my ($pr, $ow) = split ' ', $line;
2721                         $pr = unescape($pr);
2722                         $ow = unescape($ow);
2723                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2724                 }
2725                 close $fd;
2726         }
2727 }
2728
2729 sub git_get_project_owner {
2730         my $project = shift;
2731         my $owner;
2732
2733         return undef unless $project;
2734         $git_dir = "$projectroot/$project";
2735
2736         if (!defined $gitweb_project_owner) {
2737                 git_get_project_list_from_file();
2738         }
2739
2740         if (exists $gitweb_project_owner->{$project}) {
2741                 $owner = $gitweb_project_owner->{$project};
2742         }
2743         if (!defined $owner){
2744                 $owner = git_get_project_config('owner');
2745         }
2746         if (!defined $owner) {
2747                 $owner = get_file_owner("$git_dir");
2748         }
2749
2750         return $owner;
2751 }
2752
2753 sub git_get_last_activity {
2754         my ($path) = @_;
2755         my $fd;
2756
2757         $git_dir = "$projectroot/$path";
2758         open($fd, "-|", git_cmd(), 'for-each-ref',
2759              '--format=%(committer)',
2760              '--sort=-committerdate',
2761              '--count=1',
2762              'refs/heads') or return;
2763         my $most_recent = <$fd>;
2764         close $fd or return;
2765         if (defined $most_recent &&
2766             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2767                 my $timestamp = $1;
2768                 my $age = time - $timestamp;
2769                 return ($age, age_string($age));
2770         }
2771         return (undef, undef);
2772 }
2773
2774 # Implementation note: when a single remote is wanted, we cannot use 'git
2775 # remote show -n' because that command always work (assuming it's a remote URL
2776 # if it's not defined), and we cannot use 'git remote show' because that would
2777 # try to make a network roundtrip. So the only way to find if that particular
2778 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2779 # and when we find what we want.
2780 sub git_get_remotes_list {
2781         my $wanted = shift;
2782         my %remotes = ();
2783
2784         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2785         return unless $fd;
2786         while (my $remote = <$fd>) {
2787                 chomp $remote;
2788                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2789                 next if $wanted and not $remote eq $wanted;
2790                 my ($url, $key) = ($1, $2);
2791
2792                 $remotes{$remote} ||= { 'heads' => () };
2793                 $remotes{$remote}{$key} = $url;
2794         }
2795         close $fd or return;
2796         return wantarray ? %remotes : \%remotes;
2797 }
2798
2799 # Takes a hash of remotes as first parameter and fills it by adding the
2800 # available remote heads for each of the indicated remotes.
2801 sub fill_remote_heads {
2802         my $remotes = shift;
2803         my @heads = map { "remotes/$_" } keys %$remotes;
2804         my @remoteheads = git_get_heads_list(undef, @heads);
2805         foreach my $remote (keys %$remotes) {
2806                 $remotes->{$remote}{'heads'} = [ grep {
2807                         $_->{'name'} =~ s!^$remote/!!
2808                         } @remoteheads ];
2809         }
2810 }
2811
2812 sub git_get_references {
2813         my $type = shift || "";
2814         my %refs;
2815         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2816         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2817         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2818                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2819                 or return;
2820
2821         while (my $line = <$fd>) {
2822                 chomp $line;
2823                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2824                         if (defined $refs{$1}) {
2825                                 push @{$refs{$1}}, $2;
2826                         } else {
2827                                 $refs{$1} = [ $2 ];
2828                         }
2829                 }
2830         }
2831         close $fd or return;
2832         return \%refs;
2833 }
2834
2835 sub git_get_rev_name_tags {
2836         my $hash = shift || return undef;
2837
2838         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2839                 or return;
2840         my $name_rev = <$fd>;
2841         close $fd;
2842
2843         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2844                 return $1;
2845         } else {
2846                 # catches also '$hash undefined' output
2847                 return undef;
2848         }
2849 }
2850
2851 ## ----------------------------------------------------------------------
2852 ## parse to hash functions
2853
2854 sub parse_date {
2855         my $epoch = shift;
2856         my $tz = shift || "-0000";
2857
2858         my %date;
2859         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2860         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2861         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2862         $date{'hour'} = $hour;
2863         $date{'minute'} = $min;
2864         $date{'mday'} = $mday;
2865         $date{'day'} = $days[$wday];
2866         $date{'month'} = $months[$mon];
2867         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2868                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2869         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2870                              $mday, $months[$mon], $hour ,$min;
2871         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2872                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2873
2874         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2875         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2876         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2877         $date{'hour_local'} = $hour;
2878         $date{'minute_local'} = $min;
2879         $date{'tz_local'} = $tz;
2880         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2881                                   1900+$year, $mon+1, $mday,
2882                                   $hour, $min, $sec, $tz);
2883         return %date;
2884 }
2885
2886 sub parse_tag {
2887         my $tag_id = shift;
2888         my %tag;
2889         my @comment;
2890
2891         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2892         $tag{'id'} = $tag_id;
2893         while (my $line = <$fd>) {
2894                 chomp $line;
2895                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2896                         $tag{'object'} = $1;
2897                 } elsif ($line =~ m/^type (.+)$/) {
2898                         $tag{'type'} = $1;
2899                 } elsif ($line =~ m/^tag (.+)$/) {
2900                         $tag{'name'} = $1;
2901                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2902                         $tag{'author'} = $1;
2903                         $tag{'author_epoch'} = $2;
2904                         $tag{'author_tz'} = $3;
2905                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2906                                 $tag{'author_name'}  = $1;
2907                                 $tag{'author_email'} = $2;
2908                         } else {
2909                                 $tag{'author_name'} = $tag{'author'};
2910                         }
2911                 } elsif ($line =~ m/--BEGIN/) {
2912                         push @comment, $line;
2913                         last;
2914                 } elsif ($line eq "") {
2915                         last;
2916                 }
2917         }
2918         push @comment, <$fd>;
2919         $tag{'comment'} = \@comment;
2920         close $fd or return;
2921         if (!defined $tag{'name'}) {
2922                 return
2923         };
2924         return %tag
2925 }
2926
2927 sub parse_commit_text {
2928         my ($commit_text, $withparents) = @_;
2929         my @commit_lines = split '\n', $commit_text;
2930         my %co;
2931
2932         pop @commit_lines; # Remove '\0'
2933
2934         if (! @commit_lines) {
2935                 return;
2936         }
2937
2938         my $header = shift @commit_lines;
2939         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2940                 return;
2941         }
2942         ($co{'id'}, my @parents) = split ' ', $header;
2943         while (my $line = shift @commit_lines) {
2944                 last if $line eq "\n";
2945                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2946                         $co{'tree'} = $1;
2947                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2948                         push @parents, $1;
2949                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2950                         $co{'author'} = to_utf8($1);
2951                         $co{'author_epoch'} = $2;
2952                         $co{'author_tz'} = $3;
2953                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2954                                 $co{'author_name'}  = $1;
2955                                 $co{'author_email'} = $2;
2956                         } else {
2957                                 $co{'author_name'} = $co{'author'};
2958                         }
2959                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2960                         $co{'committer'} = to_utf8($1);
2961                         $co{'committer_epoch'} = $2;
2962                         $co{'committer_tz'} = $3;
2963                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2964                                 $co{'committer_name'}  = $1;
2965                                 $co{'committer_email'} = $2;
2966                         } else {
2967                                 $co{'committer_name'} = $co{'committer'};
2968                         }
2969                 }
2970         }
2971         if (!defined $co{'tree'}) {
2972                 return;
2973         };
2974         $co{'parents'} = \@parents;
2975         $co{'parent'} = $parents[0];
2976
2977         foreach my $title (@commit_lines) {
2978                 $title =~ s/^    //;
2979                 if ($title ne "") {
2980                         $co{'title'} = chop_str($title, 80, 5);
2981                         # remove leading stuff of merges to make the interesting part visible
2982                         if (length($title) > 50) {
2983                                 $title =~ s/^Automatic //;
2984                                 $title =~ s/^merge (of|with) /Merge ... /i;
2985                                 if (length($title) > 50) {
2986                                         $title =~ s/(http|rsync):\/\///;
2987                                 }
2988                                 if (length($title) > 50) {
2989                                         $title =~ s/(master|www|rsync)\.//;
2990                                 }
2991                                 if (length($title) > 50) {
2992                                         $title =~ s/kernel.org:?//;
2993                                 }
2994                                 if (length($title) > 50) {
2995                                         $title =~ s/\/pub\/scm//;
2996                                 }
2997                         }
2998                         $co{'title_short'} = chop_str($title, 50, 5);
2999                         last;
3000                 }
3001         }
3002         if (! defined $co{'title'} || $co{'title'} eq "") {
3003                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3004         }
3005         # remove added spaces
3006         foreach my $line (@commit_lines) {
3007                 $line =~ s/^    //;
3008         }
3009         $co{'comment'} = \@commit_lines;
3010
3011         my $age = time - $co{'committer_epoch'};
3012         $co{'age'} = $age;
3013         $co{'age_string'} = age_string($age);
3014         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3015         if ($age > 60*60*24*7*2) {
3016                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3017                 $co{'age_string_age'} = $co{'age_string'};
3018         } else {
3019                 $co{'age_string_date'} = $co{'age_string'};
3020                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3021         }
3022         return %co;
3023 }
3024
3025 sub parse_commit {
3026         my ($commit_id) = @_;
3027         my %co;
3028
3029         local $/ = "\0";
3030
3031         open my $fd, "-|", git_cmd(), "rev-list",
3032                 "--parents",
3033                 "--header",
3034                 "--max-count=1",
3035                 $commit_id,
3036                 "--",
3037                 or die_error(500, "Open git-rev-list failed");
3038         %co = parse_commit_text(<$fd>, 1);
3039         close $fd;
3040
3041         return %co;
3042 }
3043
3044 sub parse_commits {
3045         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3046         my @cos;
3047
3048         $maxcount ||= 1;
3049         $skip ||= 0;
3050
3051         local $/ = "\0";
3052
3053         open my $fd, "-|", git_cmd(), "rev-list",
3054                 "--header",
3055                 @args,
3056                 ("--max-count=" . $maxcount),
3057                 ("--skip=" . $skip),
3058                 @extra_options,
3059                 $commit_id,
3060                 "--",
3061                 ($filename ? ($filename) : ())
3062                 or die_error(500, "Open git-rev-list failed");
3063         while (my $line = <$fd>) {
3064                 my %co = parse_commit_text($line);
3065                 push @cos, \%co;
3066         }
3067         close $fd;
3068
3069         return wantarray ? @cos : \@cos;
3070 }
3071
3072 # parse line of git-diff-tree "raw" output
3073 sub parse_difftree_raw_line {
3074         my $line = shift;
3075         my %res;
3076
3077         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3078         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3079         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3080                 $res{'from_mode'} = $1;
3081                 $res{'to_mode'} = $2;
3082                 $res{'from_id'} = $3;
3083                 $res{'to_id'} = $4;
3084                 $res{'status'} = $5;
3085                 $res{'similarity'} = $6;
3086                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3087                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3088                 } else {
3089                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3090                 }
3091         }
3092         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3093         # combined diff (for merge commit)
3094         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3095                 $res{'nparents'}  = length($1);
3096                 $res{'from_mode'} = [ split(' ', $2) ];
3097                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3098                 $res{'from_id'} = [ split(' ', $3) ];
3099                 $res{'to_id'} = pop @{$res{'from_id'}};
3100                 $res{'status'} = [ split('', $4) ];
3101                 $res{'to_file'} = unquote($5);
3102         }
3103         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3104         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3105                 $res{'commit'} = $1;
3106         }
3107
3108         return wantarray ? %res : \%res;
3109 }
3110
3111 # wrapper: return parsed line of git-diff-tree "raw" output
3112 # (the argument might be raw line, or parsed info)
3113 sub parsed_difftree_line {
3114         my $line_or_ref = shift;
3115
3116         if (ref($line_or_ref) eq "HASH") {
3117                 # pre-parsed (or generated by hand)
3118                 return $line_or_ref;
3119         } else {
3120                 return parse_difftree_raw_line($line_or_ref);
3121         }
3122 }
3123
3124 # parse line of git-ls-tree output
3125 sub parse_ls_tree_line {
3126         my $line = shift;
3127         my %opts = @_;
3128         my %res;
3129
3130         if ($opts{'-l'}) {
3131                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3132                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3133
3134                 $res{'mode'} = $1;
3135                 $res{'type'} = $2;
3136                 $res{'hash'} = $3;
3137                 $res{'size'} = $4;
3138                 if ($opts{'-z'}) {
3139                         $res{'name'} = $5;
3140                 } else {
3141                         $res{'name'} = unquote($5);
3142                 }
3143         } else {
3144                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3145                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3146
3147                 $res{'mode'} = $1;
3148                 $res{'type'} = $2;
3149                 $res{'hash'} = $3;
3150                 if ($opts{'-z'}) {
3151                         $res{'name'} = $4;
3152                 } else {
3153                         $res{'name'} = unquote($4);
3154                 }
3155         }
3156
3157         return wantarray ? %res : \%res;
3158 }
3159
3160 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3161 sub parse_from_to_diffinfo {
3162         my ($diffinfo, $from, $to, @parents) = @_;
3163
3164         if ($diffinfo->{'nparents'}) {
3165                 # combined diff
3166                 $from->{'file'} = [];
3167                 $from->{'href'} = [];
3168                 fill_from_file_info($diffinfo, @parents)
3169                         unless exists $diffinfo->{'from_file'};
3170                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3171                         $from->{'file'}[$i] =
3172                                 defined $diffinfo->{'from_file'}[$i] ?
3173                                         $diffinfo->{'from_file'}[$i] :
3174                                         $diffinfo->{'to_file'};
3175                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3176                                 $from->{'href'}[$i] = href(action=>"blob",
3177                                                            hash_base=>$parents[$i],
3178                                                            hash=>$diffinfo->{'from_id'}[$i],
3179                                                            file_name=>$from->{'file'}[$i]);
3180                         } else {
3181                                 $from->{'href'}[$i] = undef;
3182                         }
3183                 }
3184         } else {
3185                 # ordinary (not combined) diff
3186                 $from->{'file'} = $diffinfo->{'from_file'};
3187                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3188                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3189                                                hash=>$diffinfo->{'from_id'},
3190                                                file_name=>$from->{'file'});
3191                 } else {
3192                         delete $from->{'href'};
3193                 }
3194         }
3195
3196         $to->{'file'} = $diffinfo->{'to_file'};
3197         if (!is_deleted($diffinfo)) { # file exists in result
3198                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3199                                      hash=>$diffinfo->{'to_id'},
3200                                      file_name=>$to->{'file'});
3201         } else {
3202                 delete $to->{'href'};
3203         }
3204 }
3205
3206 ## ......................................................................
3207 ## parse to array of hashes functions
3208
3209 sub git_get_heads_list {
3210         my ($limit, @classes) = @_;
3211         @classes = ('heads') unless @classes;
3212         my @patterns = map { "refs/$_" } @classes;
3213         my @headslist;
3214
3215         open my $fd, '-|', git_cmd(), 'for-each-ref',
3216                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3217                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3218                 @patterns
3219                 or return;
3220         while (my $line = <$fd>) {
3221                 my %ref_item;
3222
3223                 chomp $line;
3224                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3225                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3226                 my ($committer, $epoch, $tz) =
3227                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3228                 $ref_item{'fullname'}  = $name;
3229                 $name =~ s!^refs/(?:head|remote)s/!!;
3230
3231                 $ref_item{'name'}  = $name;
3232                 $ref_item{'id'}    = $hash;
3233                 $ref_item{'title'} = $title || '(no commit message)';
3234                 $ref_item{'epoch'} = $epoch;
3235                 if ($epoch) {
3236                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3237                 } else {
3238                         $ref_item{'age'} = "unknown";
3239                 }
3240
3241                 push @headslist, \%ref_item;
3242         }
3243         close $fd;
3244
3245         return wantarray ? @headslist : \@headslist;
3246 }
3247
3248 sub git_get_tags_list {
3249         my $limit = shift;
3250         my @tagslist;
3251
3252         open my $fd, '-|', git_cmd(), 'for-each-ref',
3253                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3254                 '--format=%(objectname) %(objecttype) %(refname) '.
3255                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3256                 'refs/tags'
3257                 or return;
3258         while (my $line = <$fd>) {
3259                 my %ref_item;
3260
3261                 chomp $line;
3262                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3263                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3264                 my ($creator, $epoch, $tz) =
3265                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3266                 $ref_item{'fullname'} = $name;
3267                 $name =~ s!^refs/tags/!!;
3268
3269                 $ref_item{'type'} = $type;
3270                 $ref_item{'id'} = $id;
3271                 $ref_item{'name'} = $name;
3272                 if ($type eq "tag") {
3273                         $ref_item{'subject'} = $title;
3274                         $ref_item{'reftype'} = $reftype;
3275                         $ref_item{'refid'}   = $refid;
3276                 } else {
3277                         $ref_item{'reftype'} = $type;
3278                         $ref_item{'refid'}   = $id;
3279                 }
3280
3281                 if ($type eq "tag" || $type eq "commit") {
3282                         $ref_item{'epoch'} = $epoch;
3283                         if ($epoch) {
3284                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3285                         } else {
3286                                 $ref_item{'age'} = "unknown";
3287                         }
3288                 }
3289
3290                 push @tagslist, \%ref_item;
3291         }
3292         close $fd;
3293
3294         return wantarray ? @tagslist : \@tagslist;
3295 }
3296
3297 ## ----------------------------------------------------------------------
3298 ## filesystem-related functions
3299
3300 sub get_file_owner {
3301         my $path = shift;
3302
3303         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3304         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3305         if (!defined $gcos) {
3306                 return undef;
3307         }
3308         my $owner = $gcos;
3309         $owner =~ s/[,;].*$//;
3310         return to_utf8($owner);
3311 }
3312
3313 # assume that file exists
3314 sub insert_file {
3315         my $filename = shift;
3316
3317         open my $fd, '<', $filename;
3318         print map { to_utf8($_) } <$fd>;
3319         close $fd;
3320 }
3321
3322 ## ......................................................................
3323 ## mimetype related functions
3324
3325 sub mimetype_guess_file {
3326         my $filename = shift;
3327         my $mimemap = shift;
3328         -r $mimemap or return undef;
3329
3330         my %mimemap;
3331         open(my $mh, '<', $mimemap) or return undef;
3332         while (<$mh>) {
3333                 next if m/^#/; # skip comments
3334                 my ($mimetype, $exts) = split(/\t+/);
3335                 if (defined $exts) {
3336                         my @exts = split(/\s+/, $exts);
3337                         foreach my $ext (@exts) {
3338                                 $mimemap{$ext} = $mimetype;
3339                         }
3340                 }
3341         }
3342         close($mh);
3343
3344         $filename =~ /\.([^.]*)$/;
3345         return $mimemap{$1};
3346 }
3347
3348 sub mimetype_guess {
3349         my $filename = shift;
3350         my $mime;
3351         $filename =~ /\./ or return undef;
3352
3353         if ($mimetypes_file) {
3354                 my $file = $mimetypes_file;
3355                 if ($file !~ m!^/!) { # if it is relative path
3356                         # it is relative to project
3357                         $file = "$projectroot/$project/$file";
3358                 }
3359                 $mime = mimetype_guess_file($filename, $file);
3360         }
3361         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3362         return $mime;
3363 }
3364
3365 sub blob_mimetype {
3366         my $fd = shift;
3367         my $filename = shift;
3368
3369         if ($filename) {
3370                 my $mime = mimetype_guess($filename);
3371                 $mime and return $mime;
3372         }
3373
3374         # just in case
3375         return $default_blob_plain_mimetype unless $fd;
3376
3377         if (-T $fd) {
3378                 return 'text/plain';
3379         } elsif (! $filename) {
3380                 return 'application/octet-stream';
3381         } elsif ($filename =~ m/\.png$/i) {
3382                 return 'image/png';
3383         } elsif ($filename =~ m/\.gif$/i) {
3384                 return 'image/gif';
3385         } elsif ($filename =~ m/\.jpe?g$/i) {
3386                 return 'image/jpeg';
3387         } else {
3388                 return 'application/octet-stream';
3389         }
3390 }
3391
3392 sub blob_contenttype {
3393         my ($fd, $file_name, $type) = @_;
3394
3395         $type ||= blob_mimetype($fd, $file_name);
3396         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3397                 $type .= "; charset=$default_text_plain_charset";
3398         }
3399
3400         return $type;
3401 }
3402
3403 # guess file syntax for syntax highlighting; return undef if no highlighting
3404 # the name of syntax can (in the future) depend on syntax highlighter used
3405 sub guess_file_syntax {
3406         my ($highlight, $mimetype, $file_name) = @_;
3407         return undef unless ($highlight && defined $file_name);
3408         my $basename = basename($file_name, '.in');
3409         return $highlight_basename{$basename}
3410                 if exists $highlight_basename{$basename};
3411
3412         $basename =~ /\.([^.]*)$/;
3413         my $ext = $1 or return undef;
3414         return $highlight_ext{$ext}
3415                 if exists $highlight_ext{$ext};
3416
3417         return undef;
3418 }
3419
3420 # run highlighter and return FD of its output,
3421 # or return original FD if no highlighting
3422 sub run_highlighter {
3423         my ($fd, $highlight, $syntax) = @_;
3424         return $fd unless ($highlight && defined $syntax);
3425
3426         close $fd
3427                 or die_error(404, "Reading blob failed");
3428         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3429                   quote_command($highlight_bin).
3430                   " --xhtml --fragment --syntax $syntax |"
3431                 or die_error(500, "Couldn't open file or run syntax highlighter");
3432         return $fd;
3433 }
3434
3435 ## ======================================================================
3436 ## functions printing HTML: header, footer, error page
3437
3438 sub get_page_title {
3439         my $title = to_utf8($site_name);
3440
3441         return $title unless (defined $project);
3442         $title .= " - " . to_utf8($project);
3443
3444         return $title unless (defined $action);
3445         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3446
3447         return $title unless (defined $file_name);
3448         $title .= " - " . esc_path($file_name);
3449         if ($action eq "tree" && $file_name !~ m|/$|) {
3450                 $title .= "/";
3451         }
3452
3453         return $title;
3454 }
3455
3456 sub git_header_html {
3457         my $status = shift || "200 OK";
3458         my $expires = shift;
3459         my %opts = @_;
3460
3461         my $title = get_page_title();
3462         my $content_type;
3463         # require explicit support from the UA if we are to send the page as
3464         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3465         # we have to do this because MSIE sometimes globs '*/*', pretending to
3466         # support xhtml+xml but choking when it gets what it asked for.
3467         if (defined $cgi->http('HTTP_ACCEPT') &&
3468             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3469             $cgi->Accept('application/xhtml+xml') != 0) {
3470                 $content_type = 'application/xhtml+xml';
3471         } else {
3472                 $content_type = 'text/html';
3473         }
3474         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3475                            -status=> $status, -expires => $expires)
3476                 unless ($opts{'-no_http_header'});
3477         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3478         print <<EOF;
3479 <?xml version="1.0" encoding="utf-8"?>
3480 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3481 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3482 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3483 <!-- git core binaries version $git_version -->
3484 <head>
3485 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3486 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3487 <meta name="robots" content="index, nofollow"/>
3488 <title>$title</title>
3489 EOF
3490         # the stylesheet, favicon etc urls won't work correctly with path_info
3491         # unless we set the appropriate base URL
3492         if ($ENV{'PATH_INFO'}) {
3493                 print "<base href=\"".esc_url($base_url)."\" />\n";
3494         }
3495         # print out each stylesheet that exist, providing backwards capability
3496         # for those people who defined $stylesheet in a config file
3497         if (defined $stylesheet) {
3498                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3499         } else {
3500                 foreach my $stylesheet (@stylesheets) {
3501                         next unless $stylesheet;
3502                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3503                 }
3504         }
3505         if (defined $project) {
3506                 my %href_params = get_feed_info();
3507                 if (!exists $href_params{'-title'}) {
3508                         $href_params{'-title'} = 'log';
3509                 }
3510
3511                 foreach my $format qw(RSS Atom) {
3512                         my $type = lc($format);
3513                         my %link_attr = (
3514                                 '-rel' => 'alternate',
3515                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3516                                 '-type' => "application/$type+xml"
3517                         );
3518
3519                         $href_params{'action'} = $type;
3520                         $link_attr{'-href'} = href(%href_params);
3521                         print "<link ".
3522                               "rel=\"$link_attr{'-rel'}\" ".
3523                               "title=\"$link_attr{'-title'}\" ".
3524                               "href=\"$link_attr{'-href'}\" ".
3525                               "type=\"$link_attr{'-type'}\" ".
3526                               "/>\n";
3527
3528                         $href_params{'extra_options'} = '--no-merges';
3529                         $link_attr{'-href'} = href(%href_params);
3530                         $link_attr{'-title'} .= ' (no merges)';
3531                         print "<link ".
3532                               "rel=\"$link_attr{'-rel'}\" ".
3533                               "title=\"$link_attr{'-title'}\" ".
3534                               "href=\"$link_attr{'-href'}\" ".
3535                               "type=\"$link_attr{'-type'}\" ".
3536                               "/>\n";
3537                 }
3538
3539         } else {
3540                 printf('<link rel="alternate" title="%s projects list" '.
3541                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3542                        $site_name, href(project=>undef, action=>"project_index"));
3543                 printf('<link rel="alternate" title="%s projects feeds" '.
3544                        'href="%s" type="text/x-opml" />'."\n",
3545                        $site_name, href(project=>undef, action=>"opml"));
3546         }
3547         if (defined $favicon) {
3548                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3549         }
3550
3551         print "</head>\n" .
3552               "<body>\n";
3553
3554         if (defined $site_header && -f $site_header) {
3555                 insert_file($site_header);
3556         }
3557
3558         print "<div class=\"page_header\">\n" .
3559               $cgi->a({-href => esc_url($logo_url),
3560                        -title => $logo_label},
3561                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3562         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3563         if (defined $project) {
3564                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3565                 if (defined $action) {
3566                         my $action_print = $action ;
3567                         if (defined $opts{-action_extra}) {
3568                                 $action_print = $cgi->a({-href => href(action=>$action)},
3569                                         $action);
3570                         }
3571                         print " / $action_print";
3572                 }
3573                 if (defined $opts{-action_extra}) {
3574                         print " / $opts{-action_extra}";
3575                 }
3576                 print "\n";
3577         }
3578         print "</div>\n";
3579
3580         my $have_search = gitweb_check_feature('search');
3581         if (defined $project && $have_search) {
3582                 if (!defined $searchtext) {
3583                         $searchtext = "";
3584                 }
3585                 my $search_hash;
3586                 if (defined $hash_base) {
3587                         $search_hash = $hash_base;
3588                 } elsif (defined $hash) {
3589                         $search_hash = $hash;
3590                 } else {
3591                         $search_hash = "HEAD";
3592                 }
3593                 my $action = $my_uri;
3594                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3595                 if ($use_pathinfo) {
3596                         $action .= "/".esc_url($project);
3597                 }
3598                 print $cgi->startform(-method => "get", -action => $action) .
3599                       "<div class=\"search\">\n" .
3600                       (!$use_pathinfo &&
3601                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3602                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3603                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3604                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3605                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3606                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3607                       " search:\n",
3608                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3609                       "<span title=\"Extended regular expression\">" .
3610                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3611                                      -checked => $search_use_regexp) .
3612                       "</span>" .
3613                       "</div>" .
3614                       $cgi->end_form() . "\n";
3615         }
3616 }
3617
3618 sub git_footer_html {
3619         my $feed_class = 'rss_logo';
3620
3621         print "<div class=\"page_footer\">\n";
3622         if (defined $project) {
3623                 my $descr = git_get_project_description($project);
3624                 if (defined $descr) {
3625                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3626                 }
3627
3628                 my %href_params = get_feed_info();
3629                 if (!%href_params) {
3630                         $feed_class .= ' generic';
3631                 }
3632                 $href_params{'-title'} ||= 'log';
3633
3634                 foreach my $format qw(RSS Atom) {
3635                         $href_params{'action'} = lc($format);
3636                         print $cgi->a({-href => href(%href_params),
3637                                       -title => "$href_params{'-title'} $format feed",
3638                                       -class => $feed_class}, $format)."\n";
3639                 }
3640
3641         } else {
3642                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3643                               -class => $feed_class}, "OPML") . " ";
3644                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3645                               -class => $feed_class}, "TXT") . "\n";
3646         }
3647         print "</div>\n"; # class="page_footer"
3648
3649         if (defined $t0 && gitweb_check_feature('timed')) {
3650                 print "<div id=\"generating_info\">\n";
3651                 print 'This page took '.
3652                       '<span id="generating_time" class="time_span">'.
3653                       tv_interval($t0, [ gettimeofday() ]).
3654                       ' seconds </span>'.
3655                       ' and '.
3656                       '<span id="generating_cmd">'.
3657                       $number_of_git_cmds.
3658                       '</span> git commands '.
3659                       " to generate.\n";
3660                 print "</div>\n"; # class="page_footer"
3661         }
3662
3663         if (defined $site_footer && -f $site_footer) {
3664                 insert_file($site_footer);
3665         }
3666
3667         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3668         if (defined $action &&
3669             $action eq 'blame_incremental') {
3670                 print qq!<script type="text/javascript">\n!.
3671                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3672                       qq!           "!. href() .qq!");\n!.
3673                       qq!</script>\n!;
3674         } elsif (gitweb_check_feature('javascript-actions')) {
3675                 print qq!<script type="text/javascript">\n!.
3676                       qq!window.onload = fixLinks;\n!.
3677                       qq!</script>\n!;
3678         }
3679
3680         print "</body>\n" .
3681               "</html>";
3682 }
3683
3684 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3685 # Example: die_error(404, 'Hash not found')
3686 # By convention, use the following status codes (as defined in RFC 2616):
3687 # 400: Invalid or missing CGI parameters, or
3688 #      requested object exists but has wrong type.
3689 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3690 #      this server or project.
3691 # 404: Requested object/revision/project doesn't exist.
3692 # 500: The server isn't configured properly, or
3693 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3694 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3695 # 503: The server is currently unavailable (because it is overloaded,
3696 #      or down for maintenance).  Generally, this is a temporary state.
3697 sub die_error {
3698         my $status = shift || 500;
3699         my $error = esc_html(shift) || "Internal Server Error";
3700         my $extra = shift;
3701         my %opts = @_;
3702
3703         my %http_responses = (
3704                 400 => '400 Bad Request',
3705                 403 => '403 Forbidden',
3706                 404 => '404 Not Found',
3707                 500 => '500 Internal Server Error',
3708                 503 => '503 Service Unavailable',
3709         );
3710         git_header_html($http_responses{$status}, undef, %opts);
3711         print <<EOF;
3712 <div class="page_body">
3713 <br /><br />
3714 $status - $error
3715 <br />
3716 EOF
3717         if (defined $extra) {
3718                 print "<hr />\n" .
3719                       "$extra\n";
3720         }
3721         print "</div>\n";
3722
3723         git_footer_html();
3724         goto DONE_GITWEB
3725                 unless ($opts{'-error_handler'});
3726 }
3727
3728 ## ----------------------------------------------------------------------
3729 ## functions printing or outputting HTML: navigation
3730
3731 sub git_print_page_nav {
3732         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3733         $extra = '' if !defined $extra; # pager or formats
3734
3735         my @navs = qw(summary shortlog log commit commitdiff tree);
3736         if ($suppress) {
3737                 @navs = grep { $_ ne $suppress } @navs;
3738         }
3739
3740         my %arg = map { $_ => {action=>$_} } @navs;
3741         if (defined $head) {
3742                 for (qw(commit commitdiff)) {
3743                         $arg{$_}{'hash'} = $head;
3744                 }
3745                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3746                         for (qw(shortlog log)) {
3747                                 $arg{$_}{'hash'} = $head;
3748                         }
3749                 }
3750         }
3751
3752         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3753         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3754
3755         my @actions = gitweb_get_feature('actions');
3756         my %repl = (
3757                 '%' => '%',
3758                 'n' => $project,         # project name
3759                 'f' => $git_dir,         # project path within filesystem
3760                 'h' => $treehead || '',  # current hash ('h' parameter)
3761                 'b' => $treebase || '',  # hash base ('hb' parameter)
3762         );
3763         while (@actions) {
3764                 my ($label, $link, $pos) = splice(@actions,0,3);
3765                 # insert
3766                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3767                 # munch munch
3768                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3769                 $arg{$label}{'_href'} = $link;
3770         }
3771
3772         print "<div class=\"page_nav\">\n" .
3773                 (join " | ",
3774                  map { $_ eq $current ?
3775                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3776                  } @navs);
3777         print "<br/>\n$extra<br/>\n" .
3778               "</div>\n";
3779 }
3780
3781 # returns a submenu for the nagivation of the refs views (tags, heads,
3782 # remotes) with the current view disabled and the remotes view only
3783 # available if the feature is enabled
3784 sub format_ref_views {
3785         my ($current) = @_;
3786         my @ref_views = qw{tags heads};
3787         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3788         return join " | ", map {
3789                 $_ eq $current ? $_ :
3790                 $cgi->a({-href => href(action=>$_)}, $_)
3791         } @ref_views
3792 }
3793
3794 sub format_paging_nav {
3795         my ($action, $page, $has_next_link) = @_;
3796         my $paging_nav;
3797
3798
3799         if ($page > 0) {
3800                 $paging_nav .=
3801                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3802                         " &sdot; " .
3803                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3804                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3805         } else {
3806                 $paging_nav .= "first &sdot; prev";
3807         }
3808
3809         if ($has_next_link) {
3810                 $paging_nav .= " &sdot; " .
3811                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3812                                  -accesskey => "n", -title => "Alt-n"}, "next");
3813         } else {
3814                 $paging_nav .= " &sdot; next";
3815         }
3816
3817         return $paging_nav;
3818 }
3819
3820 ## ......................................................................
3821 ## functions printing or outputting HTML: div
3822
3823 sub git_print_header_div {
3824         my ($action, $title, $hash, $hash_base) = @_;
3825         my %args = ();
3826
3827         $args{'action'} = $action;
3828         $args{'hash'} = $hash if $hash;
3829         $args{'hash_base'} = $hash_base if $hash_base;
3830
3831         print "<div class=\"header\">\n" .
3832               $cgi->a({-href => href(%args), -class => "title"},
3833               $title ? $title : $action) .
3834               "\n</div>\n";
3835 }
3836
3837 sub format_repo_url {
3838         my ($name, $url) = @_;
3839         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3840 }
3841
3842 # Group output by placing it in a DIV element and adding a header.
3843 # Options for start_div() can be provided by passing a hash reference as the
3844 # first parameter to the function.
3845 # Options to git_print_header_div() can be provided by passing an array
3846 # reference. This must follow the options to start_div if they are present.
3847 # The content can be a scalar, which is output as-is, a scalar reference, which
3848 # is output after html escaping, an IO handle passed either as *handle or
3849 # *handle{IO}, or a function reference. In the latter case all following
3850 # parameters will be taken as argument to the content function call.
3851 sub git_print_section {
3852         my ($div_args, $header_args, $content);
3853         my $arg = shift;
3854         if (ref($arg) eq 'HASH') {
3855                 $div_args = $arg;
3856                 $arg = shift;
3857         }
3858         if (ref($arg) eq 'ARRAY') {
3859                 $header_args = $arg;
3860                 $arg = shift;
3861         }
3862         $content = $arg;
3863
3864         print $cgi->start_div($div_args);
3865         git_print_header_div(@$header_args);
3866
3867         if (ref($content) eq 'CODE') {
3868                 $content->(@_);
3869         } elsif (ref($content) eq 'SCALAR') {
3870                 print esc_html($$content);
3871         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3872                 print <$content>;
3873         } elsif (!ref($content) && defined($content)) {
3874                 print $content;
3875         }
3876
3877         print $cgi->end_div;
3878 }
3879
3880 sub print_local_time {
3881         print format_local_time(@_);
3882 }
3883
3884 sub format_local_time {
3885         my $localtime = '';
3886         my %date = @_;
3887         if ($date{'hour_local'} < 6) {
3888                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3889                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3890         } else {
3891                 $localtime .= sprintf(" (%02d:%02d %s)",
3892                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3893         }
3894
3895         return $localtime;
3896 }
3897
3898 # Outputs the author name and date in long form
3899 sub git_print_authorship {
3900         my $co = shift;
3901         my %opts = @_;
3902         my $tag = $opts{-tag} || 'div';
3903         my $author = $co->{'author_name'};
3904
3905         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3906         print "<$tag class=\"author_date\">" .
3907               format_search_author($author, "author", esc_html($author)) .
3908               " [$ad{'rfc2822'}";
3909         print_local_time(%ad) if ($opts{-localtime});
3910         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3911                   . "</$tag>\n";
3912 }
3913
3914 # Outputs table rows containing the full author or committer information,
3915 # in the format expected for 'commit' view (& similar).
3916 # Parameters are a commit hash reference, followed by the list of people
3917 # to output information for. If the list is empty it defaults to both
3918 # author and committer.
3919 sub git_print_authorship_rows {
3920         my $co = shift;
3921         # too bad we can't use @people = @_ || ('author', 'committer')
3922         my @people = @_;
3923         @people = ('author', 'committer') unless @people;
3924         foreach my $who (@people) {
3925                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3926                 print "<tr><td>$who</td><td>" .
3927                       format_search_author($co->{"${who}_name"}, $who,
3928                                esc_html($co->{"${who}_name"})) . " " .
3929                       format_search_author($co->{"${who}_email"}, $who,
3930                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3931                       "</td><td rowspan=\"2\">" .
3932                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3933                       "</td></tr>\n" .
3934                       "<tr>" .
3935                       "<td></td><td> $wd{'rfc2822'}";
3936                 print_local_time(%wd);
3937                 print "</td>" .
3938                       "</tr>\n";
3939         }
3940 }
3941
3942 sub git_print_page_path {
3943         my $name = shift;
3944         my $type = shift;
3945         my $hb = shift;
3946
3947
3948         print "<div class=\"page_path\">";
3949         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3950                       -title => 'tree root'}, to_utf8("[$project]"));
3951         print " / ";
3952         if (defined $name) {
3953                 my @dirname = split '/', $name;
3954                 my $basename = pop @dirname;
3955                 my $fullname = '';
3956
3957                 foreach my $dir (@dirname) {
3958                         $fullname .= ($fullname ? '/' : '') . $dir;
3959                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3960                                                      hash_base=>$hb),
3961                                       -title => $fullname}, esc_path($dir));
3962                         print " / ";
3963                 }
3964                 if (defined $type && $type eq 'blob') {
3965                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3966                                                      hash_base=>$hb),
3967                                       -title => $name}, esc_path($basename));
3968                 } elsif (defined $type && $type eq 'tree') {
3969                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3970                                                      hash_base=>$hb),
3971                                       -title => $name}, esc_path($basename));
3972                         print " / ";
3973                 } else {
3974                         print esc_path($basename);
3975                 }
3976         }
3977         print "<br/></div>\n";
3978 }
3979
3980 sub git_print_log {
3981         my $log = shift;
3982         my %opts = @_;
3983
3984         if ($opts{'-remove_title'}) {
3985                 # remove title, i.e. first line of log
3986                 shift @$log;
3987         }
3988         # remove leading empty lines
3989         while (defined $log->[0] && $log->[0] eq "") {
3990                 shift @$log;
3991         }
3992
3993         # print log
3994         my $signoff = 0;
3995         my $empty = 0;
3996         foreach my $line (@$log) {
3997                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3998                         $signoff = 1;
3999                         $empty = 0;
4000                         if (! $opts{'-remove_signoff'}) {
4001                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4002                                 next;
4003                         } else {
4004                                 # remove signoff lines
4005                                 next;
4006                         }
4007                 } else {
4008                         $signoff = 0;
4009                 }
4010
4011                 # print only one empty line
4012                 # do not print empty line after signoff
4013                 if ($line eq "") {
4014                         next if ($empty || $signoff);
4015                         $empty = 1;
4016                 } else {
4017                         $empty = 0;
4018                 }
4019
4020                 print format_log_line_html($line) . "<br/>\n";
4021         }
4022
4023         if ($opts{'-final_empty_line'}) {
4024                 # end with single empty line
4025                 print "<br/>\n" unless $empty;
4026         }
4027 }
4028
4029 # return link target (what link points to)
4030 sub git_get_link_target {
4031         my $hash = shift;
4032         my $link_target;
4033
4034         # read link
4035         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4036                 or return;
4037         {
4038                 local $/ = undef;
4039                 $link_target = <$fd>;
4040         }
4041         close $fd
4042                 or return;
4043
4044         return $link_target;
4045 }
4046
4047 # given link target, and the directory (basedir) the link is in,
4048 # return target of link relative to top directory (top tree);
4049 # return undef if it is not possible (including absolute links).
4050 sub normalize_link_target {
4051         my ($link_target, $basedir) = @_;
4052
4053         # absolute symlinks (beginning with '/') cannot be normalized
4054         return if (substr($link_target, 0, 1) eq '/');
4055
4056         # normalize link target to path from top (root) tree (dir)
4057         my $path;
4058         if ($basedir) {
4059                 $path = $basedir . '/' . $link_target;
4060         } else {
4061                 # we are in top (root) tree (dir)
4062                 $path = $link_target;
4063         }
4064
4065         # remove //, /./, and /../
4066         my @path_parts;
4067         foreach my $part (split('/', $path)) {
4068                 # discard '.' and ''
4069                 next if (!$part || $part eq '.');
4070                 # handle '..'
4071                 if ($part eq '..') {
4072                         if (@path_parts) {
4073                                 pop @path_parts;
4074                         } else {
4075                                 # link leads outside repository (outside top dir)
4076                                 return;
4077                         }
4078                 } else {
4079                         push @path_parts, $part;
4080                 }
4081         }
4082         $path = join('/', @path_parts);
4083
4084         return $path;
4085 }
4086
4087 # print tree entry (row of git_tree), but without encompassing <tr> element
4088 sub git_print_tree_entry {
4089         my ($t, $basedir, $hash_base, $have_blame) = @_;
4090
4091         my %base_key = ();
4092         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4093
4094         # The format of a table row is: mode list link.  Where mode is
4095         # the mode of the entry, list is the name of the entry, an href,
4096         # and link is the action links of the entry.
4097
4098         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4099         if (exists $t->{'size'}) {
4100                 print "<td class=\"size\">$t->{'size'}</td>\n";
4101         }
4102         if ($t->{'type'} eq "blob") {
4103                 print "<td class=\"list\">" .
4104                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4105                                                file_name=>"$basedir$t->{'name'}", %base_key),
4106                                 -class => "list"}, esc_path($t->{'name'}));
4107                 if (S_ISLNK(oct $t->{'mode'})) {
4108                         my $link_target = git_get_link_target($t->{'hash'});
4109                         if ($link_target) {
4110                                 my $norm_target = normalize_link_target($link_target, $basedir);
4111                                 if (defined $norm_target) {
4112                                         print " -> " .
4113                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4114                                                                      file_name=>$norm_target),
4115                                                        -title => $norm_target}, esc_path($link_target));
4116                                 } else {
4117                                         print " -> " . esc_path($link_target);
4118                                 }
4119                         }
4120                 }
4121                 print "</td>\n";
4122                 print "<td class=\"link\">";
4123                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4124                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4125                               "blob");
4126                 if ($have_blame) {
4127                         print " | " .
4128                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4129                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4130                                       "blame");
4131                 }
4132                 if (defined $hash_base) {
4133                         print " | " .
4134                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4135                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4136                                       "history");
4137                 }
4138                 print " | " .
4139                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4140                                                file_name=>"$basedir$t->{'name'}")},
4141                                 "raw");
4142                 print "</td>\n";
4143
4144         } elsif ($t->{'type'} eq "tree") {
4145                 print "<td class=\"list\">";
4146                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4147                                              file_name=>"$basedir$t->{'name'}",
4148                                              %base_key)},
4149                               esc_path($t->{'name'}));
4150                 print "</td>\n";
4151                 print "<td class=\"link\">";
4152                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4153                                              file_name=>"$basedir$t->{'name'}",
4154                                              %base_key)},
4155                               "tree");
4156                 if (defined $hash_base) {
4157                         print " | " .
4158                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4159                                                      file_name=>"$basedir$t->{'name'}")},
4160                                       "history");
4161                 }
4162                 print "</td>\n";
4163         } else {
4164                 # unknown object: we can only present history for it
4165                 # (this includes 'commit' object, i.e. submodule support)
4166                 print "<td class=\"list\">" .
4167                       esc_path($t->{'name'}) .
4168                       "</td>\n";
4169                 print "<td class=\"link\">";
4170                 if (defined $hash_base) {
4171                         print $cgi->a({-href => href(action=>"history",
4172                                                      hash_base=>$hash_base,
4173                                                      file_name=>"$basedir$t->{'name'}")},
4174                                       "history");
4175                 }
4176                 print "</td>\n";
4177         }
4178 }
4179
4180 ## ......................................................................
4181 ## functions printing large fragments of HTML
4182
4183 # get pre-image filenames for merge (combined) diff
4184 sub fill_from_file_info {
4185         my ($diff, @parents) = @_;
4186
4187         $diff->{'from_file'} = [ ];
4188         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4189         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4190                 if ($diff->{'status'}[$i] eq 'R' ||
4191                     $diff->{'status'}[$i] eq 'C') {
4192                         $diff->{'from_file'}[$i] =
4193                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4194                 }
4195         }
4196
4197         return $diff;
4198 }
4199
4200 # is current raw difftree line of file deletion
4201 sub is_deleted {
4202         my $diffinfo = shift;
4203
4204         return $diffinfo->{'to_id'} eq ('0' x 40);
4205 }
4206
4207 # does patch correspond to [previous] difftree raw line
4208 # $diffinfo  - hashref of parsed raw diff format
4209 # $patchinfo - hashref of parsed patch diff format
4210 #              (the same keys as in $diffinfo)
4211 sub is_patch_split {
4212         my ($diffinfo, $patchinfo) = @_;
4213
4214         return defined $diffinfo && defined $patchinfo
4215                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4216 }
4217
4218
4219 sub git_difftree_body {
4220         my ($difftree, $hash, @parents) = @_;
4221         my ($parent) = $parents[0];
4222         my $have_blame = gitweb_check_feature('blame');
4223         print "<div class=\"list_head\">\n";
4224         if ($#{$difftree} > 10) {
4225                 print(($#{$difftree} + 1) . " files changed:\n");
4226         }
4227         print "</div>\n";
4228
4229         print "<table class=\"" .
4230               (@parents > 1 ? "combined " : "") .
4231               "diff_tree\">\n";
4232
4233         # header only for combined diff in 'commitdiff' view
4234         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4235         if ($has_header) {
4236                 # table header
4237                 print "<thead><tr>\n" .
4238                        "<th></th><th></th>\n"; # filename, patchN link
4239                 for (my $i = 0; $i < @parents; $i++) {
4240                         my $par = $parents[$i];
4241                         print "<th>" .
4242                               $cgi->a({-href => href(action=>"commitdiff",
4243                                                      hash=>$hash, hash_parent=>$par),
4244                                        -title => 'commitdiff to parent number ' .
4245                                                   ($i+1) . ': ' . substr($par,0,7)},
4246                                       $i+1) .
4247                               "&nbsp;</th>\n";
4248                 }
4249                 print "</tr></thead>\n<tbody>\n";
4250         }
4251
4252         my $alternate = 1;
4253         my $patchno = 0;
4254         foreach my $line (@{$difftree}) {
4255                 my $diff = parsed_difftree_line($line);
4256
4257                 if ($alternate) {
4258                         print "<tr class=\"dark\">\n";
4259                 } else {
4260                         print "<tr class=\"light\">\n";
4261                 }
4262                 $alternate ^= 1;
4263
4264                 if (exists $diff->{'nparents'}) { # combined diff
4265
4266                         fill_from_file_info($diff, @parents)
4267                                 unless exists $diff->{'from_file'};
4268
4269                         if (!is_deleted($diff)) {
4270                                 # file exists in the result (child) commit
4271                                 print "<td>" .
4272                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4273                                                              file_name=>$diff->{'to_file'},
4274                                                              hash_base=>$hash),
4275                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4276                                       "</td>\n";
4277                         } else {
4278                                 print "<td>" .
4279                                       esc_path($diff->{'to_file'}) .
4280                                       "</td>\n";
4281                         }
4282
4283                         if ($action eq 'commitdiff') {
4284                                 # link to patch
4285                                 $patchno++;
4286                                 print "<td class=\"link\">" .
4287                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4288                                       " | " .
4289                                       "</td>\n";
4290                         }
4291
4292                         my $has_history = 0;
4293                         my $not_deleted = 0;
4294                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4295                                 my $hash_parent = $parents[$i];
4296                                 my $from_hash = $diff->{'from_id'}[$i];
4297                                 my $from_path = $diff->{'from_file'}[$i];
4298                                 my $status = $diff->{'status'}[$i];
4299
4300                                 $has_history ||= ($status ne 'A');
4301                                 $not_deleted ||= ($status ne 'D');
4302
4303                                 if ($status eq 'A') {
4304                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4305                                 } elsif ($status eq 'D') {
4306                                         print "<td class=\"link\">" .
4307                                               $cgi->a({-href => href(action=>"blob",
4308                                                                      hash_base=>$hash,
4309                                                                      hash=>$from_hash,
4310                                                                      file_name=>$from_path)},
4311                                                       "blob" . ($i+1)) .
4312                                               " | </td>\n";
4313                                 } else {
4314                                         if ($diff->{'to_id'} eq $from_hash) {
4315                                                 print "<td class=\"link nochange\">";
4316                                         } else {
4317                                                 print "<td class=\"link\">";
4318                                         }
4319                                         print $cgi->a({-href => href(action=>"blobdiff",
4320                                                                      hash=>$diff->{'to_id'},
4321                                                                      hash_parent=>$from_hash,
4322                                                                      hash_base=>$hash,
4323                                                                      hash_parent_base=>$hash_parent,
4324                                                                      file_name=>$diff->{'to_file'},
4325                                                                      file_parent=>$from_path)},
4326                                                       "diff" . ($i+1)) .
4327                                               " | </td>\n";
4328                                 }
4329                         }
4330
4331                         print "<td class=\"link\">";
4332                         if ($not_deleted) {
4333                                 print $cgi->a({-href => href(action=>"blob",
4334                                                              hash=>$diff->{'to_id'},
4335                                                              file_name=>$diff->{'to_file'},
4336                                                              hash_base=>$hash)},
4337                                               "blob");
4338                                 print " | " if ($has_history);
4339                         }
4340                         if ($has_history) {
4341                                 print $cgi->a({-href => href(action=>"history",
4342                                                              file_name=>$diff->{'to_file'},
4343                                                              hash_base=>$hash)},
4344                                               "history");
4345                         }
4346                         print "</td>\n";
4347
4348                         print "</tr>\n";
4349                         next; # instead of 'else' clause, to avoid extra indent
4350                 }
4351                 # else ordinary diff
4352
4353                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4354                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4355                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4356                         $to_mode_oct = oct $diff->{'to_mode'};
4357                         if (S_ISREG($to_mode_oct)) { # only for regular file
4358                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4359                         }
4360                         $to_file_type = file_type($diff->{'to_mode'});
4361                 }
4362                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4363                         $from_mode_oct = oct $diff->{'from_mode'};
4364                         if (S_ISREG($to_mode_oct)) { # only for regular file
4365                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4366                         }
4367                         $from_file_type = file_type($diff->{'from_mode'});
4368                 }
4369
4370                 if ($diff->{'status'} eq "A") { # created
4371                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4372                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4373                         $mode_chng   .= "]</span>";
4374                         print "<td>";
4375                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4376                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4377                                       -class => "list"}, esc_path($diff->{'file'}));
4378                         print "</td>\n";
4379                         print "<td>$mode_chng</td>\n";
4380                         print "<td class=\"link\">";
4381                         if ($action eq 'commitdiff') {
4382                                 # link to patch
4383                                 $patchno++;
4384                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4385                                 print " | ";
4386                         }
4387                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4388                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4389                                       "blob");
4390                         print "</td>\n";
4391
4392                 } elsif ($diff->{'status'} eq "D") { # deleted
4393                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4394                         print "<td>";
4395                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4396                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4397                                        -class => "list"}, esc_path($diff->{'file'}));
4398                         print "</td>\n";
4399                         print "<td>$mode_chng</td>\n";
4400                         print "<td class=\"link\">";
4401                         if ($action eq 'commitdiff') {
4402                                 # link to patch
4403                                 $patchno++;
4404                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4405                                 print " | ";
4406                         }
4407                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4408                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4409                                       "blob") . " | ";
4410                         if ($have_blame) {
4411                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4412                                                              file_name=>$diff->{'file'})},
4413                                               "blame") . " | ";
4414                         }
4415                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4416                                                      file_name=>$diff->{'file'})},
4417                                       "history");
4418                         print "</td>\n";
4419
4420                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4421                         my $mode_chnge = "";
4422                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4423                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4424                                 if ($from_file_type ne $to_file_type) {
4425                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4426                                 }
4427                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4428                                         if ($from_mode_str && $to_mode_str) {
4429                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4430                                         } elsif ($to_mode_str) {
4431                                                 $mode_chnge .= " mode: $to_mode_str";
4432                                         }
4433                                 }
4434                                 $mode_chnge .= "]</span>\n";
4435                         }
4436                         print "<td>";
4437                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4438                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4439                                       -class => "list"}, esc_path($diff->{'file'}));
4440                         print "</td>\n";
4441                         print "<td>$mode_chnge</td>\n";
4442                         print "<td class=\"link\">";
4443                         if ($action eq 'commitdiff') {
4444                                 # link to patch
4445                                 $patchno++;
4446                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4447                                       " | ";
4448                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4449                                 # "commit" view and modified file (not onlu mode changed)
4450                                 print $cgi->a({-href => href(action=>"blobdiff",
4451                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4452                                                              hash_base=>$hash, hash_parent_base=>$parent,
4453                                                              file_name=>$diff->{'file'})},
4454                                               "diff") .
4455                                       " | ";
4456                         }
4457                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4458                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4459                                        "blob") . " | ";
4460                         if ($have_blame) {
4461                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4462                                                              file_name=>$diff->{'file'})},
4463                                               "blame") . " | ";
4464                         }
4465                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4466                                                      file_name=>$diff->{'file'})},
4467                                       "history");
4468                         print "</td>\n";
4469
4470                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4471                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4472                         my $nstatus = $status_name{$diff->{'status'}};
4473                         my $mode_chng = "";
4474                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4475                                 # mode also for directories, so we cannot use $to_mode_str
4476                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4477                         }
4478                         print "<td>" .
4479                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4480                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4481                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4482                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4483                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4484                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4485                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4486                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4487                               "<td class=\"link\">";
4488                         if ($action eq 'commitdiff') {
4489                                 # link to patch
4490                                 $patchno++;
4491                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4492                                       " | ";
4493                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4494                                 # "commit" view and modified file (not only pure rename or copy)
4495                                 print $cgi->a({-href => href(action=>"blobdiff",
4496                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4497                                                              hash_base=>$hash, hash_parent_base=>$parent,
4498                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4499                                               "diff") .
4500                                       " | ";
4501                         }
4502                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4503                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4504                                       "blob") . " | ";
4505                         if ($have_blame) {
4506                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4507                                                              file_name=>$diff->{'to_file'})},
4508                                               "blame") . " | ";
4509                         }
4510                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4511                                                     file_name=>$diff->{'to_file'})},
4512                                       "history");
4513                         print "</td>\n";
4514
4515                 } # we should not encounter Unmerged (U) or Unknown (X) status
4516                 print "</tr>\n";
4517         }
4518         print "</tbody>" if $has_header;
4519         print "</table>\n";
4520 }
4521
4522 sub git_patchset_body {
4523         my ($fd, $difftree, $hash, @hash_parents) = @_;
4524         my ($hash_parent) = $hash_parents[0];
4525
4526         my $is_combined = (@hash_parents > 1);
4527         my $patch_idx = 0;
4528         my $patch_number = 0;
4529         my $patch_line;
4530         my $diffinfo;
4531         my $to_name;
4532         my (%from, %to);
4533
4534         print "<div class=\"patchset\">\n";
4535
4536         # skip to first patch
4537         while ($patch_line = <$fd>) {
4538                 chomp $patch_line;
4539
4540                 last if ($patch_line =~ m/^diff /);
4541         }
4542
4543  PATCH:
4544         while ($patch_line) {
4545
4546                 # parse "git diff" header line
4547                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4548                         # $1 is from_name, which we do not use
4549                         $to_name = unquote($2);
4550                         $to_name =~ s!^b/!!;
4551                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4552                         # $1 is 'cc' or 'combined', which we do not use
4553                         $to_name = unquote($2);
4554                 } else {
4555                         $to_name = undef;
4556                 }
4557
4558                 # check if current patch belong to current raw line
4559                 # and parse raw git-diff line if needed
4560                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4561                         # this is continuation of a split patch
4562                         print "<div class=\"patch cont\">\n";
4563                 } else {
4564                         # advance raw git-diff output if needed
4565                         $patch_idx++ if defined $diffinfo;
4566
4567                         # read and prepare patch information
4568                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4569
4570                         # compact combined diff output can have some patches skipped
4571                         # find which patch (using pathname of result) we are at now;
4572                         if ($is_combined) {
4573                                 while ($to_name ne $diffinfo->{'to_file'}) {
4574                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4575                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4576                                               "</div>\n";  # class="patch"
4577
4578                                         $patch_idx++;
4579                                         $patch_number++;
4580
4581                                         last if $patch_idx > $#$difftree;
4582                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4583                                 }
4584                         }
4585
4586                         # modifies %from, %to hashes
4587                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4588
4589                         # this is first patch for raw difftree line with $patch_idx index
4590                         # we index @$difftree array from 0, but number patches from 1
4591                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4592                 }
4593
4594                 # git diff header
4595                 #assert($patch_line =~ m/^diff /) if DEBUG;
4596                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4597                 $patch_number++;
4598                 # print "git diff" header
4599                 print format_git_diff_header_line($patch_line, $diffinfo,
4600                                                   \%from, \%to);
4601
4602                 # print extended diff header
4603                 print "<div class=\"diff extended_header\">\n";
4604         EXTENDED_HEADER:
4605                 while ($patch_line = <$fd>) {
4606                         chomp $patch_line;
4607
4608                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4609
4610                         print format_extended_diff_header_line($patch_line, $diffinfo,
4611                                                                \%from, \%to);
4612                 }
4613                 print "</div>\n"; # class="diff extended_header"
4614
4615                 # from-file/to-file diff header
4616                 if (! $patch_line) {
4617                         print "</div>\n"; # class="patch"
4618                         last PATCH;
4619                 }
4620                 next PATCH if ($patch_line =~ m/^diff /);
4621                 #assert($patch_line =~ m/^---/) if DEBUG;
4622
4623                 my $last_patch_line = $patch_line;
4624                 $patch_line = <$fd>;
4625                 chomp $patch_line;
4626                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4627
4628                 print format_diff_from_to_header($last_patch_line, $patch_line,
4629                                                  $diffinfo, \%from, \%to,
4630                                                  @hash_parents);
4631
4632                 # the patch itself
4633         LINE:
4634                 while ($patch_line = <$fd>) {
4635                         chomp $patch_line;
4636
4637                         next PATCH if ($patch_line =~ m/^diff /);
4638
4639                         print format_diff_line($patch_line, \%from, \%to);
4640                 }
4641
4642         } continue {
4643                 print "</div>\n"; # class="patch"
4644         }
4645
4646         # for compact combined (--cc) format, with chunk and patch simplification
4647         # the patchset might be empty, but there might be unprocessed raw lines
4648         for (++$patch_idx if $patch_number > 0;
4649              $patch_idx < @$difftree;
4650              ++$patch_idx) {
4651                 # read and prepare patch information
4652                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4653
4654                 # generate anchor for "patch" links in difftree / whatchanged part
4655                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4656                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4657                       "</div>\n";  # class="patch"
4658
4659                 $patch_number++;
4660         }
4661
4662         if ($patch_number == 0) {
4663                 if (@hash_parents > 1) {
4664                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4665                 } else {
4666                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4667                 }
4668         }
4669
4670         print "</div>\n"; # class="patchset"
4671 }
4672
4673 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4674
4675 # fills project list info (age, description, owner, forks) for each
4676 # project in the list, removing invalid projects from returned list
4677 # NOTE: modifies $projlist, but does not remove entries from it
4678 sub fill_project_list_info {
4679         my ($projlist, $check_forks) = @_;
4680         my @projects;
4681
4682         my $show_ctags = gitweb_check_feature('ctags');
4683  PROJECT:
4684         foreach my $pr (@$projlist) {
4685                 my (@activity) = git_get_last_activity($pr->{'path'});
4686                 unless (@activity) {
4687                         next PROJECT;
4688                 }
4689                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4690                 if (!defined $pr->{'descr'}) {
4691                         my $descr = git_get_project_description($pr->{'path'}) || "";
4692                         $descr = to_utf8($descr);
4693                         $pr->{'descr_long'} = $descr;
4694                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4695                 }
4696                 if (!defined $pr->{'owner'}) {
4697                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4698                 }
4699                 if ($check_forks) {
4700                         my $pname = $pr->{'path'};
4701                         if (($pname =~ s/\.git$//) &&
4702                             ($pname !~ /\/$/) &&
4703                             (-d "$projectroot/$pname")) {
4704                                 $pr->{'forks'} = "-d $projectroot/$pname";
4705                         } else {
4706                                 $pr->{'forks'} = 0;
4707                         }
4708                 }
4709                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4710                 push @projects, $pr;
4711         }
4712
4713         return @projects;
4714 }
4715
4716 # print 'sort by' <th> element, generating 'sort by $name' replay link
4717 # if that order is not selected
4718 sub print_sort_th {
4719         print format_sort_th(@_);
4720 }
4721
4722 sub format_sort_th {
4723         my ($name, $order, $header) = @_;
4724         my $sort_th = "";
4725         $header ||= ucfirst($name);
4726
4727         if ($order eq $name) {
4728                 $sort_th .= "<th>$header</th>\n";
4729         } else {
4730                 $sort_th .= "<th>" .
4731                             $cgi->a({-href => href(-replay=>1, order=>$name),
4732                                      -class => "header"}, $header) .
4733                             "</th>\n";
4734         }
4735
4736         return $sort_th;
4737 }
4738
4739 sub git_project_list_body {
4740         # actually uses global variable $project
4741         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4742
4743         my $check_forks = gitweb_check_feature('forks');
4744         my @projects = fill_project_list_info($projlist, $check_forks);
4745
4746         $order ||= $default_projects_order;
4747         $from = 0 unless defined $from;
4748         $to = $#projects if (!defined $to || $#projects < $to);
4749
4750         my %order_info = (
4751                 project => { key => 'path', type => 'str' },
4752                 descr => { key => 'descr_long', type => 'str' },
4753                 owner => { key => 'owner', type => 'str' },
4754                 age => { key => 'age', type => 'num' }
4755         );
4756         my $oi = $order_info{$order};
4757         if ($oi->{'type'} eq 'str') {
4758                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4759         } else {
4760                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4761         }
4762
4763         my $show_ctags = gitweb_check_feature('ctags');
4764         if ($show_ctags) {
4765                 my %ctags;
4766                 foreach my $p (@projects) {
4767                         foreach my $ct (keys %{$p->{'ctags'}}) {
4768                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4769                         }
4770                 }
4771                 my $cloud = git_populate_project_tagcloud(\%ctags);
4772                 print git_show_project_tagcloud($cloud, 64);
4773         }
4774
4775         print "<table class=\"project_list\">\n";
4776         unless ($no_header) {
4777                 print "<tr>\n";
4778                 if ($check_forks) {
4779                         print "<th></th>\n";
4780                 }
4781                 print_sort_th('project', $order, 'Project');
4782                 print_sort_th('descr', $order, 'Description');
4783                 print_sort_th('owner', $order, 'Owner');
4784                 print_sort_th('age', $order, 'Last Change');
4785                 print "<th></th>\n" . # for links
4786                       "</tr>\n";
4787         }
4788         my $alternate = 1;
4789         my $tagfilter = $cgi->param('by_tag');
4790         for (my $i = $from; $i <= $to; $i++) {
4791                 my $pr = $projects[$i];
4792
4793                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4794                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4795                         and not $pr->{'descr_long'} =~ /$searchtext/;
4796                 # Weed out forks or non-matching entries of search
4797                 if ($check_forks) {
4798                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4799                         $forkbase="^$forkbase" if $forkbase;
4800                         next if not $searchtext and not $tagfilter and $show_ctags
4801                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4802                 }
4803
4804                 if ($alternate) {
4805                         print "<tr class=\"dark\">\n";
4806                 } else {
4807                         print "<tr class=\"light\">\n";
4808                 }
4809                 $alternate ^= 1;
4810                 if ($check_forks) {
4811                         print "<td>";
4812                         if ($pr->{'forks'}) {
4813                                 print "<!-- $pr->{'forks'} -->\n";
4814                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4815                         }
4816                         print "</td>\n";
4817                 }
4818                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4819                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4820                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4821                                         -class => "list", -title => $pr->{'descr_long'}},
4822                                         esc_html($pr->{'descr'})) . "</td>\n" .
4823                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4824                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4825                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4826                       "<td class=\"link\">" .
4827                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4828                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4829                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4830                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4831                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4832                       "</td>\n" .
4833                       "</tr>\n";
4834         }
4835         if (defined $extra) {
4836                 print "<tr>\n";
4837                 if ($check_forks) {
4838                         print "<td></td>\n";
4839                 }
4840                 print "<td colspan=\"5\">$extra</td>\n" .
4841                       "</tr>\n";
4842         }
4843         print "</table>\n";
4844 }
4845
4846 sub git_log_body {
4847         # uses global variable $project
4848         my ($commitlist, $from, $to, $refs, $extra) = @_;
4849
4850         $from = 0 unless defined $from;
4851         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4852
4853         for (my $i = 0; $i <= $to; $i++) {
4854                 my %co = %{$commitlist->[$i]};
4855                 next if !%co;
4856                 my $commit = $co{'id'};
4857                 my $ref = format_ref_marker($refs, $commit);
4858                 my %ad = parse_date($co{'author_epoch'});
4859                 git_print_header_div('commit',
4860                                "<span class=\"age\">$co{'age_string'}</span>" .
4861                                esc_html($co{'title'}) . $ref,
4862                                $commit);
4863                 print "<div class=\"title_text\">\n" .
4864                       "<div class=\"log_link\">\n" .
4865                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4866                       " | " .
4867                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4868                       " | " .
4869                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4870                       "<br/>\n" .
4871                       "</div>\n";
4872                       git_print_authorship(\%co, -tag => 'span');
4873                       print "<br/>\n</div>\n";
4874
4875                 print "<div class=\"log_body\">\n";
4876                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4877                 print "</div>\n";
4878         }
4879         if ($extra) {
4880                 print "<div class=\"page_nav\">\n";
4881                 print "$extra\n";
4882                 print "</div>\n";
4883         }
4884 }
4885
4886 sub git_shortlog_body {
4887         # uses global variable $project
4888         my ($commitlist, $from, $to, $refs, $extra) = @_;
4889
4890         $from = 0 unless defined $from;
4891         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4892
4893         print "<table class=\"shortlog\">\n";
4894         my $alternate = 1;
4895         for (my $i = $from; $i <= $to; $i++) {
4896                 my %co = %{$commitlist->[$i]};
4897                 my $commit = $co{'id'};
4898                 my $ref = format_ref_marker($refs, $commit);
4899                 if ($alternate) {
4900                         print "<tr class=\"dark\">\n";
4901                 } else {
4902                         print "<tr class=\"light\">\n";
4903                 }
4904                 $alternate ^= 1;
4905                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4906                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4907                       format_author_html('td', \%co, 10) . "<td>";
4908                 print format_subject_html($co{'title'}, $co{'title_short'},
4909                                           href(action=>"commit", hash=>$commit), $ref);
4910                 print "</td>\n" .
4911                       "<td class=\"link\">" .
4912                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4913                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4914                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4915                 my $snapshot_links = format_snapshot_links($commit);
4916                 if (defined $snapshot_links) {
4917                         print " | " . $snapshot_links;
4918                 }
4919                 print "</td>\n" .
4920                       "</tr>\n";
4921         }
4922         if (defined $extra) {
4923                 print "<tr>\n" .
4924                       "<td colspan=\"4\">$extra</td>\n" .
4925                       "</tr>\n";
4926         }
4927         print "</table>\n";
4928 }
4929
4930 sub git_history_body {
4931         # Warning: assumes constant type (blob or tree) during history
4932         my ($commitlist, $from, $to, $refs, $extra,
4933             $file_name, $file_hash, $ftype) = @_;
4934
4935         $from = 0 unless defined $from;
4936         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4937
4938         print "<table class=\"history\">\n";
4939         my $alternate = 1;
4940         for (my $i = $from; $i <= $to; $i++) {
4941                 my %co = %{$commitlist->[$i]};
4942                 if (!%co) {
4943                         next;
4944                 }
4945                 my $commit = $co{'id'};
4946
4947                 my $ref = format_ref_marker($refs, $commit);
4948
4949                 if ($alternate) {
4950                         print "<tr class=\"dark\">\n";
4951                 } else {
4952                         print "<tr class=\"light\">\n";
4953                 }
4954                 $alternate ^= 1;
4955                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4956         # shortlog:   format_author_html('td', \%co, 10)
4957                       format_author_html('td', \%co, 15, 3) . "<td>";
4958                 # originally git_history used chop_str($co{'title'}, 50)
4959                 print format_subject_html($co{'title'}, $co{'title_short'},
4960                                           href(action=>"commit", hash=>$commit), $ref);
4961                 print "</td>\n" .
4962                       "<td class=\"link\">" .
4963                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4964                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4965
4966                 if ($ftype eq 'blob') {
4967                         my $blob_current = $file_hash;
4968                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4969                         if (defined $blob_current && defined $blob_parent &&
4970                                         $blob_current ne $blob_parent) {
4971                                 print " | " .
4972                                         $cgi->a({-href => href(action=>"blobdiff",
4973                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4974                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4975                                                                file_name=>$file_name)},
4976                                                 "diff to current");
4977                         }
4978                 }
4979                 print "</td>\n" .
4980                       "</tr>\n";
4981         }
4982         if (defined $extra) {
4983                 print "<tr>\n" .
4984                       "<td colspan=\"4\">$extra</td>\n" .
4985                       "</tr>\n";
4986         }
4987         print "</table>\n";
4988 }
4989
4990 sub git_tags_body {
4991         # uses global variable $project
4992         my ($taglist, $from, $to, $extra) = @_;
4993         $from = 0 unless defined $from;
4994         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4995
4996         print "<table class=\"tags\">\n";
4997         my $alternate = 1;
4998         for (my $i = $from; $i <= $to; $i++) {
4999                 my $entry = $taglist->[$i];
5000                 my %tag = %$entry;
5001                 my $comment = $tag{'subject'};
5002                 my $comment_short;
5003                 if (defined $comment) {
5004                         $comment_short = chop_str($comment, 30, 5);
5005                 }
5006                 if ($alternate) {
5007                         print "<tr class=\"dark\">\n";
5008                 } else {
5009                         print "<tr class=\"light\">\n";
5010                 }
5011                 $alternate ^= 1;
5012                 if (defined $tag{'age'}) {
5013                         print "<td><i>$tag{'age'}</i></td>\n";
5014                 } else {
5015                         print "<td></td>\n";
5016                 }
5017                 print "<td>" .
5018                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5019                                -class => "list name"}, esc_html($tag{'name'})) .
5020                       "</td>\n" .
5021                       "<td>";
5022                 if (defined $comment) {
5023                         print format_subject_html($comment, $comment_short,
5024                                                   href(action=>"tag", hash=>$tag{'id'}));
5025                 }
5026                 print "</td>\n" .
5027                       "<td class=\"selflink\">";
5028                 if ($tag{'type'} eq "tag") {
5029                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5030                 } else {
5031                         print "&nbsp;";
5032                 }
5033                 print "</td>\n" .
5034                       "<td class=\"link\">" . " | " .
5035                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5036                 if ($tag{'reftype'} eq "commit") {
5037                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5038                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5039                 } elsif ($tag{'reftype'} eq "blob") {
5040                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5041                 }
5042                 print "</td>\n" .
5043                       "</tr>";
5044         }
5045         if (defined $extra) {
5046                 print "<tr>\n" .
5047                       "<td colspan=\"5\">$extra</td>\n" .
5048                       "</tr>\n";
5049         }
5050         print "</table>\n";
5051 }
5052
5053 sub git_heads_body {
5054         # uses global variable $project
5055         my ($headlist, $head, $from, $to, $extra) = @_;
5056         $from = 0 unless defined $from;
5057         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5058
5059         print "<table class=\"heads\">\n";
5060         my $alternate = 1;
5061         for (my $i = $from; $i <= $to; $i++) {
5062                 my $entry = $headlist->[$i];
5063                 my %ref = %$entry;
5064                 my $curr = $ref{'id'} eq $head;
5065                 if ($alternate) {
5066                         print "<tr class=\"dark\">\n";
5067                 } else {
5068                         print "<tr class=\"light\">\n";
5069                 }
5070                 $alternate ^= 1;
5071                 print "<td><i>$ref{'age'}</i></td>\n" .
5072                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5073                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5074                                -class => "list name"},esc_html($ref{'name'})) .
5075                       "</td>\n" .
5076                       "<td class=\"link\">" .
5077                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5078                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5079                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5080                       "</td>\n" .
5081                       "</tr>";
5082         }
5083         if (defined $extra) {
5084                 print "<tr>\n" .
5085                       "<td colspan=\"3\">$extra</td>\n" .
5086                       "</tr>\n";
5087         }
5088         print "</table>\n";
5089 }
5090
5091 # Display a single remote block
5092 sub git_remote_block {
5093         my ($remote, $rdata, $limit, $head) = @_;
5094
5095         my $heads = $rdata->{'heads'};
5096         my $fetch = $rdata->{'fetch'};
5097         my $push = $rdata->{'push'};
5098
5099         my $urls_table = "<table class=\"projects_list\">\n" ;
5100
5101         if (defined $fetch) {
5102                 if ($fetch eq $push) {
5103                         $urls_table .= format_repo_url("URL", $fetch);
5104                 } else {
5105                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5106                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5107                 }
5108         } elsif (defined $push) {
5109                 $urls_table .= format_repo_url("Push URL", $push);
5110         } else {
5111                 $urls_table .= format_repo_url("", "No remote URL");
5112         }
5113
5114         $urls_table .= "</table>\n";
5115
5116         my $dots;
5117         if (defined $limit && $limit < @$heads) {
5118                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5119         }
5120
5121         print $urls_table;
5122         git_heads_body($heads, $head, 0, $limit, $dots);
5123 }
5124
5125 # Display a list of remote names with the respective fetch and push URLs
5126 sub git_remotes_list {
5127         my ($remotedata, $limit) = @_;
5128         print "<table class=\"heads\">\n";
5129         my $alternate = 1;
5130         my @remotes = sort keys %$remotedata;
5131
5132         my $limited = $limit && $limit < @remotes;
5133
5134         $#remotes = $limit - 1 if $limited;
5135
5136         while (my $remote = shift @remotes) {
5137                 my $rdata = $remotedata->{$remote};
5138                 my $fetch = $rdata->{'fetch'};
5139                 my $push = $rdata->{'push'};
5140                 if ($alternate) {
5141                         print "<tr class=\"dark\">\n";
5142                 } else {
5143                         print "<tr class=\"light\">\n";
5144                 }
5145                 $alternate ^= 1;
5146                 print "<td>" .
5147                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5148                                -class=> "list name"},esc_html($remote)) .
5149                       "</td>";
5150                 print "<td class=\"link\">" .
5151                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5152                       " | " .
5153                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5154                       "</td>";
5155
5156                 print "</tr>\n";
5157         }
5158
5159         if ($limited) {
5160                 print "<tr>\n" .
5161                       "<td colspan=\"3\">" .
5162                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5163                       "</td>\n" . "</tr>\n";
5164         }
5165
5166         print "</table>";
5167 }
5168
5169 # Display remote heads grouped by remote, unless there are too many
5170 # remotes, in which case we only display the remote names
5171 sub git_remotes_body {
5172         my ($remotedata, $limit, $head) = @_;
5173         if ($limit and $limit < keys %$remotedata) {
5174                 git_remotes_list($remotedata, $limit);
5175         } else {
5176                 fill_remote_heads($remotedata);
5177                 while (my ($remote, $rdata) = each %$remotedata) {
5178                         git_print_section({-class=>"remote", -id=>$remote},
5179                                 ["remotes", $remote, $remote], sub {
5180                                         git_remote_block($remote, $rdata, $limit, $head);
5181                                 });
5182                 }
5183         }
5184 }
5185
5186 sub git_search_grep_body {
5187         my ($commitlist, $from, $to, $extra) = @_;
5188         $from = 0 unless defined $from;
5189         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5190
5191         print "<table class=\"commit_search\">\n";
5192         my $alternate = 1;
5193         for (my $i = $from; $i <= $to; $i++) {
5194                 my %co = %{$commitlist->[$i]};
5195                 if (!%co) {
5196                         next;
5197                 }
5198                 my $commit = $co{'id'};
5199                 if ($alternate) {
5200                         print "<tr class=\"dark\">\n";
5201                 } else {
5202                         print "<tr class=\"light\">\n";
5203                 }
5204                 $alternate ^= 1;
5205                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5206                       format_author_html('td', \%co, 15, 5) .
5207                       "<td>" .
5208                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5209                                -class => "list subject"},
5210                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5211                 my $comment = $co{'comment'};
5212                 foreach my $line (@$comment) {
5213                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5214                                 my ($lead, $match, $trail) = ($1, $2, $3);
5215                                 $match = chop_str($match, 70, 5, 'center');
5216                                 my $contextlen = int((80 - length($match))/2);
5217                                 $contextlen = 30 if ($contextlen > 30);
5218                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5219                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5220
5221                                 $lead  = esc_html($lead);
5222                                 $match = esc_html($match);
5223                                 $trail = esc_html($trail);
5224
5225                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5226                         }
5227                 }
5228                 print "</td>\n" .
5229                       "<td class=\"link\">" .
5230                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5231                       " | " .
5232                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5233                       " | " .
5234                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5235                 print "</td>\n" .
5236                       "</tr>\n";
5237         }
5238         if (defined $extra) {
5239                 print "<tr>\n" .
5240                       "<td colspan=\"3\">$extra</td>\n" .
5241                       "</tr>\n";
5242         }
5243         print "</table>\n";
5244 }
5245
5246 ## ======================================================================
5247 ## ======================================================================
5248 ## actions
5249
5250 sub git_project_list {
5251         my $order = $input_params{'order'};
5252         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5253                 die_error(400, "Unknown order parameter");
5254         }
5255
5256         my @list = git_get_projects_list();
5257         if (!@list) {
5258                 die_error(404, "No projects found");
5259         }
5260
5261         git_header_html();
5262         if (defined $home_text && -f $home_text) {
5263                 print "<div class=\"index_include\">\n";
5264                 insert_file($home_text);
5265                 print "</div>\n";
5266         }
5267         print $cgi->startform(-method => "get") .
5268               "<p class=\"projsearch\">Search:\n" .
5269               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5270               "</p>" .
5271               $cgi->end_form() . "\n";
5272         git_project_list_body(\@list, $order);
5273         git_footer_html();
5274 }
5275
5276 sub git_forks {
5277         my $order = $input_params{'order'};
5278         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5279                 die_error(400, "Unknown order parameter");
5280         }
5281
5282         my @list = git_get_projects_list($project);
5283         if (!@list) {
5284                 die_error(404, "No forks found");
5285         }
5286
5287         git_header_html();
5288         git_print_page_nav('','');
5289         git_print_header_div('summary', "$project forks");
5290         git_project_list_body(\@list, $order);
5291         git_footer_html();
5292 }
5293
5294 sub git_project_index {
5295         my @projects = git_get_projects_list($project);
5296
5297         print $cgi->header(
5298                 -type => 'text/plain',
5299                 -charset => 'utf-8',
5300                 -content_disposition => 'inline; filename="index.aux"');
5301
5302         foreach my $pr (@projects) {
5303                 if (!exists $pr->{'owner'}) {
5304                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5305                 }
5306
5307                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5308                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5309                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5310                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5311                 $path  =~ s/ /\+/g;
5312                 $owner =~ s/ /\+/g;
5313
5314                 print "$path $owner\n";
5315         }
5316 }
5317
5318 sub git_summary {
5319         my $descr = git_get_project_description($project) || "none";
5320         my %co = parse_commit("HEAD");
5321         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5322         my $head = $co{'id'};
5323         my $remote_heads = gitweb_check_feature('remote_heads');
5324
5325         my $owner = git_get_project_owner($project);
5326
5327         my $refs = git_get_references();
5328         # These get_*_list functions return one more to allow us to see if
5329         # there are more ...
5330         my @taglist  = git_get_tags_list(16);
5331         my @headlist = git_get_heads_list(16);
5332         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5333         my @forklist;
5334         my $check_forks = gitweb_check_feature('forks');
5335
5336         if ($check_forks) {
5337                 @forklist = git_get_projects_list($project);
5338         }
5339
5340         git_header_html();
5341         git_print_page_nav('summary','', $head);
5342
5343         print "<div class=\"title\">&nbsp;</div>\n";
5344         print "<table class=\"projects_list\">\n" .
5345               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5346               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5347         if (defined $cd{'rfc2822'}) {
5348                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5349         }
5350
5351         # use per project git URL list in $projectroot/$project/cloneurl
5352         # or make project git URL from git base URL and project name
5353         my $url_tag = "URL";
5354         my @url_list = git_get_project_url_list($project);
5355         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5356         foreach my $git_url (@url_list) {
5357                 next unless $git_url;
5358                 print format_repo_url($url_tag, $git_url);
5359                 $url_tag = "";
5360         }
5361
5362         # Tag cloud
5363         my $show_ctags = gitweb_check_feature('ctags');
5364         if ($show_ctags) {
5365                 my $ctags = git_get_project_ctags($project);
5366                 my $cloud = git_populate_project_tagcloud($ctags);
5367                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5368                 print "</td>\n<td>" unless %$ctags;
5369                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5370                 print "</td>\n<td>" if %$ctags;
5371                 print git_show_project_tagcloud($cloud, 48);
5372                 print "</td></tr>";
5373         }
5374
5375         print "</table>\n";
5376
5377         # If XSS prevention is on, we don't include README.html.
5378         # TODO: Allow a readme in some safe format.
5379         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5380                 print "<div class=\"title\">readme</div>\n" .
5381                       "<div class=\"readme\">\n";
5382                 insert_file("$projectroot/$project/README.html");
5383                 print "\n</div>\n"; # class="readme"
5384         }
5385
5386         # we need to request one more than 16 (0..15) to check if
5387         # those 16 are all
5388         my @commitlist = $head ? parse_commits($head, 17) : ();
5389         if (@commitlist) {
5390                 git_print_header_div('shortlog');
5391                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5392                                   $#commitlist <=  15 ? undef :
5393                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5394         }
5395
5396         if (@taglist) {
5397                 git_print_header_div('tags');
5398                 git_tags_body(\@taglist, 0, 15,
5399                               $#taglist <=  15 ? undef :
5400                               $cgi->a({-href => href(action=>"tags")}, "..."));
5401         }
5402
5403         if (@headlist) {
5404                 git_print_header_div('heads');
5405                 git_heads_body(\@headlist, $head, 0, 15,
5406                                $#headlist <= 15 ? undef :
5407                                $cgi->a({-href => href(action=>"heads")}, "..."));
5408         }
5409
5410         if (%remotedata) {
5411                 git_print_header_div('remotes');
5412                 git_remotes_body(\%remotedata, 15, $head);
5413         }
5414
5415         if (@forklist) {
5416                 git_print_header_div('forks');
5417                 git_project_list_body(\@forklist, 'age', 0, 15,
5418                                       $#forklist <= 15 ? undef :
5419                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5420                                       'no_header');
5421         }
5422
5423         git_footer_html();
5424 }
5425
5426 sub git_tag {
5427         my %tag = parse_tag($hash);
5428
5429         if (! %tag) {
5430                 die_error(404, "Unknown tag object");
5431         }
5432
5433         my $head = git_get_head_hash($project);
5434         git_header_html();
5435         git_print_page_nav('','', $head,undef,$head);
5436         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5437         print "<div class=\"title_text\">\n" .
5438               "<table class=\"object_header\">\n" .
5439               "<tr>\n" .
5440               "<td>object</td>\n" .
5441               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5442                                $tag{'object'}) . "</td>\n" .
5443               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5444                                               $tag{'type'}) . "</td>\n" .
5445               "</tr>\n";
5446         if (defined($tag{'author'})) {
5447                 git_print_authorship_rows(\%tag, 'author');
5448         }
5449         print "</table>\n\n" .
5450               "</div>\n";
5451         print "<div class=\"page_body\">";
5452         my $comment = $tag{'comment'};
5453         foreach my $line (@$comment) {
5454                 chomp $line;
5455                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5456         }
5457         print "</div>\n";
5458         git_footer_html();
5459 }
5460
5461 sub git_blame_common {
5462         my $format = shift || 'porcelain';
5463         if ($format eq 'porcelain' && $cgi->param('js')) {
5464                 $format = 'incremental';
5465                 $action = 'blame_incremental'; # for page title etc
5466         }
5467
5468         # permissions
5469         gitweb_check_feature('blame')
5470                 or die_error(403, "Blame view not allowed");
5471
5472         # error checking
5473         die_error(400, "No file name given") unless $file_name;
5474         $hash_base ||= git_get_head_hash($project);
5475         die_error(404, "Couldn't find base commit") unless $hash_base;
5476         my %co = parse_commit($hash_base)
5477                 or die_error(404, "Commit not found");
5478         my $ftype = "blob";
5479         if (!defined $hash) {
5480                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5481                         or die_error(404, "Error looking up file");
5482         } else {
5483                 $ftype = git_get_type($hash);
5484                 if ($ftype !~ "blob") {
5485                         die_error(400, "Object is not a blob");
5486                 }
5487         }
5488
5489         my $fd;
5490         if ($format eq 'incremental') {
5491                 # get file contents (as base)
5492                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5493                         or die_error(500, "Open git-cat-file failed");
5494         } elsif ($format eq 'data') {
5495                 # run git-blame --incremental
5496                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5497                         $hash_base, "--", $file_name
5498                         or die_error(500, "Open git-blame --incremental failed");
5499         } else {
5500                 # run git-blame --porcelain
5501                 open $fd, "-|", git_cmd(), "blame", '-p',
5502                         $hash_base, '--', $file_name
5503                         or die_error(500, "Open git-blame --porcelain failed");
5504         }
5505
5506         # incremental blame data returns early
5507         if ($format eq 'data') {
5508                 print $cgi->header(
5509                         -type=>"text/plain", -charset => "utf-8",
5510                         -status=> "200 OK");
5511                 local $| = 1; # output autoflush
5512                 print while <$fd>;
5513                 close $fd
5514                         or print "ERROR $!\n";
5515
5516                 print 'END';
5517                 if (defined $t0 && gitweb_check_feature('timed')) {
5518                         print ' '.
5519                               tv_interval($t0, [ gettimeofday() ]).
5520                               ' '.$number_of_git_cmds;
5521                 }
5522                 print "\n";
5523
5524                 return;
5525         }
5526
5527         # page header
5528         git_header_html();
5529         my $formats_nav =
5530                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5531                         "blob") .
5532                 " | ";
5533         if ($format eq 'incremental') {
5534                 $formats_nav .=
5535                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5536                                 "blame") . " (non-incremental)";
5537         } else {
5538                 $formats_nav .=
5539                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5540                                 "blame") . " (incremental)";
5541         }
5542         $formats_nav .=
5543                 " | " .
5544                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5545                         "history") .
5546                 " | " .
5547                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5548                         "HEAD");
5549         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5550         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5551         git_print_page_path($file_name, $ftype, $hash_base);
5552
5553         # page body
5554         if ($format eq 'incremental') {
5555                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5556                       "This page requires JavaScript to run.\n Use ".
5557                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5558                               'this page').
5559                       " instead.\n".
5560                       "</b></center></div>\n</noscript>\n";
5561
5562                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5563         }
5564
5565         print qq!<div class="page_body">\n!;
5566         print qq!<div id="progress_info">... / ...</div>\n!
5567                 if ($format eq 'incremental');
5568         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5569               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5570               qq!<thead>\n!.
5571               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5572               qq!</thead>\n!.
5573               qq!<tbody>\n!;
5574
5575         my @rev_color = qw(light dark);
5576         my $num_colors = scalar(@rev_color);
5577         my $current_color = 0;
5578
5579         if ($format eq 'incremental') {
5580                 my $color_class = $rev_color[$current_color];
5581
5582                 #contents of a file
5583                 my $linenr = 0;
5584         LINE:
5585                 while (my $line = <$fd>) {
5586                         chomp $line;
5587                         $linenr++;
5588
5589                         print qq!<tr id="l$linenr" class="$color_class">!.
5590                               qq!<td class="sha1"><a href=""> </a></td>!.
5591                               qq!<td class="linenr">!.
5592                               qq!<a class="linenr" href="">$linenr</a></td>!;
5593                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5594                         print qq!</tr>\n!;
5595                 }
5596
5597         } else { # porcelain, i.e. ordinary blame
5598                 my %metainfo = (); # saves information about commits
5599
5600                 # blame data
5601         LINE:
5602                 while (my $line = <$fd>) {
5603                         chomp $line;
5604                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5605                         # no <lines in group> for subsequent lines in group of lines
5606                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5607                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5608                         if (!exists $metainfo{$full_rev}) {
5609                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5610                         }
5611                         my $meta = $metainfo{$full_rev};
5612                         my $data;
5613                         while ($data = <$fd>) {
5614                                 chomp $data;
5615                                 last if ($data =~ s/^\t//); # contents of line
5616                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5617                                         $meta->{$1} = $2 unless exists $meta->{$1};
5618                                 }
5619                                 if ($data =~ /^previous /) {
5620                                         $meta->{'nprevious'}++;
5621                                 }
5622                         }
5623                         my $short_rev = substr($full_rev, 0, 8);
5624                         my $author = $meta->{'author'};
5625                         my %date =
5626                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5627                         my $date = $date{'iso-tz'};
5628                         if ($group_size) {
5629                                 $current_color = ($current_color + 1) % $num_colors;
5630                         }
5631                         my $tr_class = $rev_color[$current_color];
5632                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5633                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5634                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5635                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5636                         if ($group_size) {
5637                                 print "<td class=\"sha1\"";
5638                                 print " title=\"". esc_html($author) . ", $date\"";
5639                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5640                                 print ">";
5641                                 print $cgi->a({-href => href(action=>"commit",
5642                                                              hash=>$full_rev,
5643                                                              file_name=>$file_name)},
5644                                               esc_html($short_rev));
5645                                 if ($group_size >= 2) {
5646                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5647                                         if (@author_initials) {
5648                                                 print "<br />" .
5649                                                       esc_html(join('', @author_initials));
5650                                                 #           or join('.', ...)
5651                                         }
5652                                 }
5653                                 print "</td>\n";
5654                         }
5655                         # 'previous' <sha1 of parent commit> <filename at commit>
5656                         if (exists $meta->{'previous'} &&
5657                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5658                                 $meta->{'parent'} = $1;
5659                                 $meta->{'file_parent'} = unquote($2);
5660                         }
5661                         my $linenr_commit =
5662                                 exists($meta->{'parent'}) ?
5663                                 $meta->{'parent'} : $full_rev;
5664                         my $linenr_filename =
5665                                 exists($meta->{'file_parent'}) ?
5666                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5667                         my $blamed = href(action => 'blame',
5668                                           file_name => $linenr_filename,
5669                                           hash_base => $linenr_commit);
5670                         print "<td class=\"linenr\">";
5671                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5672                                         -class => "linenr" },
5673                                       esc_html($lineno));
5674                         print "</td>";
5675                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5676                         print "</tr>\n";
5677                 } # end while
5678
5679         }
5680
5681         # footer
5682         print "</tbody>\n".
5683               "</table>\n"; # class="blame"
5684         print "</div>\n";   # class="blame_body"
5685         close $fd
5686                 or print "Reading blob failed\n";
5687
5688         git_footer_html();
5689 }
5690
5691 sub git_blame {
5692         git_blame_common();
5693 }
5694
5695 sub git_blame_incremental {
5696         git_blame_common('incremental');
5697 }
5698
5699 sub git_blame_data {
5700         git_blame_common('data');
5701 }
5702
5703 sub git_tags {
5704         my $head = git_get_head_hash($project);
5705         git_header_html();
5706         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5707         git_print_header_div('summary', $project);
5708
5709         my @tagslist = git_get_tags_list();
5710         if (@tagslist) {
5711                 git_tags_body(\@tagslist);
5712         }
5713         git_footer_html();
5714 }
5715
5716 sub git_heads {
5717         my $head = git_get_head_hash($project);
5718         git_header_html();
5719         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5720         git_print_header_div('summary', $project);
5721
5722         my @headslist = git_get_heads_list();
5723         if (@headslist) {
5724                 git_heads_body(\@headslist, $head);
5725         }
5726         git_footer_html();
5727 }
5728
5729 # used both for single remote view and for list of all the remotes
5730 sub git_remotes {
5731         gitweb_check_feature('remote_heads')
5732                 or die_error(403, "Remote heads view is disabled");
5733
5734         my $head = git_get_head_hash($project);
5735         my $remote = $input_params{'hash'};
5736
5737         my $remotedata = git_get_remotes_list($remote);
5738         die_error(500, "Unable to get remote information") unless defined $remotedata;
5739
5740         unless (%$remotedata) {
5741                 die_error(404, defined $remote ?
5742                         "Remote $remote not found" :
5743                         "No remotes found");
5744         }
5745
5746         git_header_html(undef, undef, -action_extra => $remote);
5747         git_print_page_nav('', '',  $head, undef, $head,
5748                 format_ref_views($remote ? '' : 'remotes'));
5749
5750         fill_remote_heads($remotedata);
5751         if (defined $remote) {
5752                 git_print_header_div('remotes', "$remote remote for $project");
5753                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5754         } else {
5755                 git_print_header_div('summary', "$project remotes");
5756                 git_remotes_body($remotedata, undef, $head);
5757         }
5758
5759         git_footer_html();
5760 }
5761
5762 sub git_blob_plain {
5763         my $type = shift;
5764         my $expires;
5765
5766         if (!defined $hash) {
5767                 if (defined $file_name) {
5768                         my $base = $hash_base || git_get_head_hash($project);
5769                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5770                                 or die_error(404, "Cannot find file");
5771                 } else {
5772                         die_error(400, "No file name defined");
5773                 }
5774         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5775                 # blobs defined by non-textual hash id's can be cached
5776                 $expires = "+1d";
5777         }
5778
5779         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5780                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5781
5782         # content-type (can include charset)
5783         $type = blob_contenttype($fd, $file_name, $type);
5784
5785         # "save as" filename, even when no $file_name is given
5786         my $save_as = "$hash";
5787         if (defined $file_name) {
5788                 $save_as = $file_name;
5789         } elsif ($type =~ m/^text\//) {
5790                 $save_as .= '.txt';
5791         }
5792
5793         # With XSS prevention on, blobs of all types except a few known safe
5794         # ones are served with "Content-Disposition: attachment" to make sure
5795         # they don't run in our security domain.  For certain image types,
5796         # blob view writes an <img> tag referring to blob_plain view, and we
5797         # want to be sure not to break that by serving the image as an
5798         # attachment (though Firefox 3 doesn't seem to care).
5799         my $sandbox = $prevent_xss &&
5800                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5801
5802         print $cgi->header(
5803                 -type => $type,
5804                 -expires => $expires,
5805                 -content_disposition =>
5806                         ($sandbox ? 'attachment' : 'inline')
5807                         . '; filename="' . $save_as . '"');
5808         local $/ = undef;
5809         binmode STDOUT, ':raw';
5810         print <$fd>;
5811         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5812         close $fd;
5813 }
5814
5815 sub git_blob {
5816         my $expires;
5817
5818         if (!defined $hash) {
5819                 if (defined $file_name) {
5820                         my $base = $hash_base || git_get_head_hash($project);
5821                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5822                                 or die_error(404, "Cannot find file");
5823                 } else {
5824                         die_error(400, "No file name defined");
5825                 }
5826         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5827                 # blobs defined by non-textual hash id's can be cached
5828                 $expires = "+1d";
5829         }
5830
5831         my $have_blame = gitweb_check_feature('blame');
5832         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5833                 or die_error(500, "Couldn't cat $file_name, $hash");
5834         my $mimetype = blob_mimetype($fd, $file_name);
5835         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5836         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5837                 close $fd;
5838                 return git_blob_plain($mimetype);
5839         }
5840         # we can have blame only for text/* mimetype
5841         $have_blame &&= ($mimetype =~ m!^text/!);
5842
5843         my $highlight = gitweb_check_feature('highlight');
5844         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5845         $fd = run_highlighter($fd, $highlight, $syntax)
5846                 if $syntax;
5847
5848         git_header_html(undef, $expires);
5849         my $formats_nav = '';
5850         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5851                 if (defined $file_name) {
5852                         if ($have_blame) {
5853                                 $formats_nav .=
5854                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5855                                                 "blame") .
5856                                         " | ";
5857                         }
5858                         $formats_nav .=
5859                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5860                                         "history") .
5861                                 " | " .
5862                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5863                                         "raw") .
5864                                 " | " .
5865                                 $cgi->a({-href => href(action=>"blob",
5866                                                        hash_base=>"HEAD", file_name=>$file_name)},
5867                                         "HEAD");
5868                 } else {
5869                         $formats_nav .=
5870                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5871                                         "raw");
5872                 }
5873                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5874                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5875         } else {
5876                 print "<div class=\"page_nav\">\n" .
5877                       "<br/><br/></div>\n" .
5878                       "<div class=\"title\">$hash</div>\n";
5879         }
5880         git_print_page_path($file_name, "blob", $hash_base);
5881         print "<div class=\"page_body\">\n";
5882         if ($mimetype =~ m!^image/!) {
5883                 print qq!<img type="$mimetype"!;
5884                 if ($file_name) {
5885                         print qq! alt="$file_name" title="$file_name"!;
5886                 }
5887                 print qq! src="! .
5888                       href(action=>"blob_plain", hash=>$hash,
5889                            hash_base=>$hash_base, file_name=>$file_name) .
5890                       qq!" />\n!;
5891         } else {
5892                 my $nr;
5893                 while (my $line = <$fd>) {
5894                         chomp $line;
5895                         $nr++;
5896                         $line = untabify($line);
5897                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5898                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5899                 }
5900         }
5901         close $fd
5902                 or print "Reading blob failed.\n";
5903         print "</div>";
5904         git_footer_html();
5905 }
5906
5907 sub git_tree {
5908         if (!defined $hash_base) {
5909                 $hash_base = "HEAD";
5910         }
5911         if (!defined $hash) {
5912                 if (defined $file_name) {
5913                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5914                 } else {
5915                         $hash = $hash_base;
5916                 }
5917         }
5918         die_error(404, "No such tree") unless defined($hash);
5919
5920         my $show_sizes = gitweb_check_feature('show-sizes');
5921         my $have_blame = gitweb_check_feature('blame');
5922
5923         my @entries = ();
5924         {
5925                 local $/ = "\0";
5926                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5927                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5928                         or die_error(500, "Open git-ls-tree failed");
5929                 @entries = map { chomp; $_ } <$fd>;
5930                 close $fd
5931                         or die_error(404, "Reading tree failed");
5932         }
5933
5934         my $refs = git_get_references();
5935         my $ref = format_ref_marker($refs, $hash_base);
5936         git_header_html();
5937         my $basedir = '';
5938         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5939                 my @views_nav = ();
5940                 if (defined $file_name) {
5941                         push @views_nav,
5942                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5943                                         "history"),
5944                                 $cgi->a({-href => href(action=>"tree",
5945                                                        hash_base=>"HEAD", file_name=>$file_name)},
5946                                         "HEAD"),
5947                 }
5948                 my $snapshot_links = format_snapshot_links($hash);
5949                 if (defined $snapshot_links) {
5950                         # FIXME: Should be available when we have no hash base as well.
5951                         push @views_nav, $snapshot_links;
5952                 }
5953                 git_print_page_nav('tree','', $hash_base, undef, undef,
5954                                    join(' | ', @views_nav));
5955                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5956         } else {
5957                 undef $hash_base;
5958                 print "<div class=\"page_nav\">\n";
5959                 print "<br/><br/></div>\n";
5960                 print "<div class=\"title\">$hash</div>\n";
5961         }
5962         if (defined $file_name) {
5963                 $basedir = $file_name;
5964                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5965                         $basedir .= '/';
5966                 }
5967                 git_print_page_path($file_name, 'tree', $hash_base);
5968         }
5969         print "<div class=\"page_body\">\n";
5970         print "<table class=\"tree\">\n";
5971         my $alternate = 1;
5972         # '..' (top directory) link if possible
5973         if (defined $hash_base &&
5974             defined $file_name && $file_name =~ m![^/]+$!) {
5975                 if ($alternate) {
5976                         print "<tr class=\"dark\">\n";
5977                 } else {
5978                         print "<tr class=\"light\">\n";
5979                 }
5980                 $alternate ^= 1;
5981
5982                 my $up = $file_name;
5983                 $up =~ s!/?[^/]+$!!;
5984                 undef $up unless $up;
5985                 # based on git_print_tree_entry
5986                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5987                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5988                 print '<td class="list">';
5989                 print $cgi->a({-href => href(action=>"tree",
5990                                              hash_base=>$hash_base,
5991                                              file_name=>$up)},
5992                               "..");
5993                 print "</td>\n";
5994                 print "<td class=\"link\"></td>\n";
5995
5996                 print "</tr>\n";
5997         }
5998         foreach my $line (@entries) {
5999                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6000
6001                 if ($alternate) {
6002                         print "<tr class=\"dark\">\n";
6003                 } else {
6004                         print "<tr class=\"light\">\n";
6005                 }
6006                 $alternate ^= 1;
6007
6008                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6009
6010                 print "</tr>\n";
6011         }
6012         print "</table>\n" .
6013               "</div>";
6014         git_footer_html();
6015 }
6016
6017 sub snapshot_name {
6018         my ($project, $hash) = @_;
6019
6020         # path/to/project.git  -> project
6021         # path/to/project/.git -> project
6022         my $name = to_utf8($project);
6023         $name =~ s,([^/])/*\.git$,$1,;
6024         $name = basename($name);
6025         # sanitize name
6026         $name =~ s/[[:cntrl:]]/?/g;
6027
6028         my $ver = $hash;
6029         if ($hash =~ /^[0-9a-fA-F]+$/) {
6030                 # shorten SHA-1 hash
6031                 my $full_hash = git_get_full_hash($project, $hash);
6032                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6033                         $ver = git_get_short_hash($project, $hash);
6034                 }
6035         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6036                 # tags don't need shortened SHA-1 hash
6037                 $ver = $1;
6038         } else {
6039                 # branches and other need shortened SHA-1 hash
6040                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6041                         $ver = $1;
6042                 }
6043                 $ver .= '-' . git_get_short_hash($project, $hash);
6044         }
6045         # in case of hierarchical branch names
6046         $ver =~ s!/!.!g;
6047
6048         # name = project-version_string
6049         $name = "$name-$ver";
6050
6051         return wantarray ? ($name, $name) : $name;
6052 }
6053
6054 sub git_snapshot {
6055         my $format = $input_params{'snapshot_format'};
6056         if (!@snapshot_fmts) {
6057                 die_error(403, "Snapshots not allowed");
6058         }
6059         # default to first supported snapshot format
6060         $format ||= $snapshot_fmts[0];
6061         if ($format !~ m/^[a-z0-9]+$/) {
6062                 die_error(400, "Invalid snapshot format parameter");
6063         } elsif (!exists($known_snapshot_formats{$format})) {
6064                 die_error(400, "Unknown snapshot format");
6065         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6066                 die_error(403, "Snapshot format not allowed");
6067         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6068                 die_error(403, "Unsupported snapshot format");
6069         }
6070
6071         my $type = git_get_type("$hash^{}");
6072         if (!$type) {
6073                 die_error(404, 'Object does not exist');
6074         }  elsif ($type eq 'blob') {
6075                 die_error(400, 'Object is not a tree-ish');
6076         }
6077
6078         my ($name, $prefix) = snapshot_name($project, $hash);
6079         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6080         my $cmd = quote_command(
6081                 git_cmd(), 'archive',
6082                 "--format=$known_snapshot_formats{$format}{'format'}",
6083                 "--prefix=$prefix/", $hash);
6084         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6085                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6086         }
6087
6088         $filename =~ s/(["\\])/\\$1/g;
6089         print $cgi->header(
6090                 -type => $known_snapshot_formats{$format}{'type'},
6091                 -content_disposition => 'inline; filename="' . $filename . '"',
6092                 -status => '200 OK');
6093
6094         open my $fd, "-|", $cmd
6095                 or die_error(500, "Execute git-archive failed");
6096         binmode STDOUT, ':raw';
6097         print <$fd>;
6098         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6099         close $fd;
6100 }
6101
6102 sub git_log_generic {
6103         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6104
6105         my $head = git_get_head_hash($project);
6106         if (!defined $base) {
6107                 $base = $head;
6108         }
6109         if (!defined $page) {
6110                 $page = 0;
6111         }
6112         my $refs = git_get_references();
6113
6114         my $commit_hash = $base;
6115         if (defined $parent) {
6116                 $commit_hash = "$parent..$base";
6117         }
6118         my @commitlist =
6119                 parse_commits($commit_hash, 101, (100 * $page),
6120                               defined $file_name ? ($file_name, "--full-history") : ());
6121
6122         my $ftype;
6123         if (!defined $file_hash && defined $file_name) {
6124                 # some commits could have deleted file in question,
6125                 # and not have it in tree, but one of them has to have it
6126                 for (my $i = 0; $i < @commitlist; $i++) {
6127                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6128                         last if defined $file_hash;
6129                 }
6130         }
6131         if (defined $file_hash) {
6132                 $ftype = git_get_type($file_hash);
6133         }
6134         if (defined $file_name && !defined $ftype) {
6135                 die_error(500, "Unknown type of object");
6136         }
6137         my %co;
6138         if (defined $file_name) {
6139                 %co = parse_commit($base)
6140                         or die_error(404, "Unknown commit object");
6141         }
6142
6143
6144         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6145         my $next_link = '';
6146         if ($#commitlist >= 100) {
6147                 $next_link =
6148                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6149                                  -accesskey => "n", -title => "Alt-n"}, "next");
6150         }
6151         my $patch_max = gitweb_get_feature('patches');
6152         if ($patch_max && !defined $file_name) {
6153                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6154                         $paging_nav .= " &sdot; " .
6155                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6156                                         "patches");
6157                 }
6158         }
6159
6160         git_header_html();
6161         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6162         if (defined $file_name) {
6163                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6164         } else {
6165                 git_print_header_div('summary', $project)
6166         }
6167         git_print_page_path($file_name, $ftype, $hash_base)
6168                 if (defined $file_name);
6169
6170         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6171                      $file_name, $file_hash, $ftype);
6172
6173         git_footer_html();
6174 }
6175
6176 sub git_log {
6177         git_log_generic('log', \&git_log_body,
6178                         $hash, $hash_parent);
6179 }
6180
6181 sub git_commit {
6182         $hash ||= $hash_base || "HEAD";
6183         my %co = parse_commit($hash)
6184             or die_error(404, "Unknown commit object");
6185
6186         my $parent  = $co{'parent'};
6187         my $parents = $co{'parents'}; # listref
6188
6189         # we need to prepare $formats_nav before any parameter munging
6190         my $formats_nav;
6191         if (!defined $parent) {
6192                 # --root commitdiff
6193                 $formats_nav .= '(initial)';
6194         } elsif (@$parents == 1) {
6195                 # single parent commit
6196                 $formats_nav .=
6197                         '(parent: ' .
6198                         $cgi->a({-href => href(action=>"commit",
6199                                                hash=>$parent)},
6200                                 esc_html(substr($parent, 0, 7))) .
6201                         ')';
6202         } else {
6203                 # merge commit
6204                 $formats_nav .=
6205                         '(merge: ' .
6206                         join(' ', map {
6207                                 $cgi->a({-href => href(action=>"commit",
6208                                                        hash=>$_)},
6209                                         esc_html(substr($_, 0, 7)));
6210                         } @$parents ) .
6211                         ')';
6212         }
6213         if (gitweb_check_feature('patches') && @$parents <= 1) {
6214                 $formats_nav .= " | " .
6215                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6216                                 "patch");
6217         }
6218
6219         if (!defined $parent) {
6220                 $parent = "--root";
6221         }
6222         my @difftree;
6223         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6224                 @diff_opts,
6225                 (@$parents <= 1 ? $parent : '-c'),
6226                 $hash, "--"
6227                 or die_error(500, "Open git-diff-tree failed");
6228         @difftree = map { chomp; $_ } <$fd>;
6229         close $fd or die_error(404, "Reading git-diff-tree failed");
6230
6231         # non-textual hash id's can be cached
6232         my $expires;
6233         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6234                 $expires = "+1d";
6235         }
6236         my $refs = git_get_references();
6237         my $ref = format_ref_marker($refs, $co{'id'});
6238
6239         git_header_html(undef, $expires);
6240         git_print_page_nav('commit', '',
6241                            $hash, $co{'tree'}, $hash,
6242                            $formats_nav);
6243
6244         if (defined $co{'parent'}) {
6245                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6246         } else {
6247                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6248         }
6249         print "<div class=\"title_text\">\n" .
6250               "<table class=\"object_header\">\n";
6251         git_print_authorship_rows(\%co);
6252         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6253         print "<tr>" .
6254               "<td>tree</td>" .
6255               "<td class=\"sha1\">" .
6256               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6257                        class => "list"}, $co{'tree'}) .
6258               "</td>" .
6259               "<td class=\"link\">" .
6260               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6261                       "tree");
6262         my $snapshot_links = format_snapshot_links($hash);
6263         if (defined $snapshot_links) {
6264                 print " | " . $snapshot_links;
6265         }
6266         print "</td>" .
6267               "</tr>\n";
6268
6269         foreach my $par (@$parents) {
6270                 print "<tr>" .
6271                       "<td>parent</td>" .
6272                       "<td class=\"sha1\">" .
6273                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6274                                class => "list"}, $par) .
6275                       "</td>" .
6276                       "<td class=\"link\">" .
6277                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6278                       " | " .
6279                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6280                       "</td>" .
6281                       "</tr>\n";
6282         }
6283         print "</table>".
6284               "</div>\n";
6285
6286         print "<div class=\"page_body\">\n";
6287         git_print_log($co{'comment'});
6288         print "</div>\n";
6289
6290         git_difftree_body(\@difftree, $hash, @$parents);
6291
6292         git_footer_html();
6293 }
6294
6295 sub git_object {
6296         # object is defined by:
6297         # - hash or hash_base alone
6298         # - hash_base and file_name
6299         my $type;
6300
6301         # - hash or hash_base alone
6302         if ($hash || ($hash_base && !defined $file_name)) {
6303                 my $object_id = $hash || $hash_base;
6304
6305                 open my $fd, "-|", quote_command(
6306                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6307                         or die_error(404, "Object does not exist");
6308                 $type = <$fd>;
6309                 chomp $type;
6310                 close $fd
6311                         or die_error(404, "Object does not exist");
6312
6313         # - hash_base and file_name
6314         } elsif ($hash_base && defined $file_name) {
6315                 $file_name =~ s,/+$,,;
6316
6317                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6318                         or die_error(404, "Base object does not exist");
6319
6320                 # here errors should not hapen
6321                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6322                         or die_error(500, "Open git-ls-tree failed");
6323                 my $line = <$fd>;
6324                 close $fd;
6325
6326                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6327                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6328                         die_error(404, "File or directory for given base does not exist");
6329                 }
6330                 $type = $2;
6331                 $hash = $3;
6332         } else {
6333                 die_error(400, "Not enough information to find object");
6334         }
6335
6336         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6337                                           hash=>$hash, hash_base=>$hash_base,
6338                                           file_name=>$file_name),
6339                              -status => '302 Found');
6340 }
6341
6342 sub git_blobdiff {
6343         my $format = shift || 'html';
6344
6345         my $fd;
6346         my @difftree;
6347         my %diffinfo;
6348         my $expires;
6349
6350         # preparing $fd and %diffinfo for git_patchset_body
6351         # new style URI
6352         if (defined $hash_base && defined $hash_parent_base) {
6353                 if (defined $file_name) {
6354                         # read raw output
6355                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6356                                 $hash_parent_base, $hash_base,
6357                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6358                                 or die_error(500, "Open git-diff-tree failed");
6359                         @difftree = map { chomp; $_ } <$fd>;
6360                         close $fd
6361                                 or die_error(404, "Reading git-diff-tree failed");
6362                         @difftree
6363                                 or die_error(404, "Blob diff not found");
6364
6365                 } elsif (defined $hash &&
6366                          $hash =~ /[0-9a-fA-F]{40}/) {
6367                         # try to find filename from $hash
6368
6369                         # read filtered raw output
6370                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6371                                 $hash_parent_base, $hash_base, "--"
6372                                 or die_error(500, "Open git-diff-tree failed");
6373                         @difftree =
6374                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6375                                 # $hash == to_id
6376                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6377                                 map { chomp; $_ } <$fd>;
6378                         close $fd
6379                                 or die_error(404, "Reading git-diff-tree failed");
6380                         @difftree
6381                                 or die_error(404, "Blob diff not found");
6382
6383                 } else {
6384                         die_error(400, "Missing one of the blob diff parameters");
6385                 }
6386
6387                 if (@difftree > 1) {
6388                         die_error(400, "Ambiguous blob diff specification");
6389                 }
6390
6391                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6392                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6393                 $file_name   ||= $diffinfo{'to_file'};
6394
6395                 $hash_parent ||= $diffinfo{'from_id'};
6396                 $hash        ||= $diffinfo{'to_id'};
6397
6398                 # non-textual hash id's can be cached
6399                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6400                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6401                         $expires = '+1d';
6402                 }
6403
6404                 # open patch output
6405                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6406                         '-p', ($format eq 'html' ? "--full-index" : ()),
6407                         $hash_parent_base, $hash_base,
6408                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6409                         or die_error(500, "Open git-diff-tree failed");
6410         }
6411
6412         # old/legacy style URI -- not generated anymore since 1.4.3.
6413         if (!%diffinfo) {
6414                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6415         }
6416
6417         # header
6418         if ($format eq 'html') {
6419                 my $formats_nav =
6420                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6421                                 "raw");
6422                 git_header_html(undef, $expires);
6423                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6424                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6425                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6426                 } else {
6427                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6428                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6429                 }
6430                 if (defined $file_name) {
6431                         git_print_page_path($file_name, "blob", $hash_base);
6432                 } else {
6433                         print "<div class=\"page_path\"></div>\n";
6434                 }
6435
6436         } elsif ($format eq 'plain') {
6437                 print $cgi->header(
6438                         -type => 'text/plain',
6439                         -charset => 'utf-8',
6440                         -expires => $expires,
6441                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6442
6443                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6444
6445         } else {
6446                 die_error(400, "Unknown blobdiff format");
6447         }
6448
6449         # patch
6450         if ($format eq 'html') {
6451                 print "<div class=\"page_body\">\n";
6452
6453                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6454                 close $fd;
6455
6456                 print "</div>\n"; # class="page_body"
6457                 git_footer_html();
6458
6459         } else {
6460                 while (my $line = <$fd>) {
6461                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6462                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6463
6464                         print $line;
6465
6466                         last if $line =~ m!^\+\+\+!;
6467                 }
6468                 local $/ = undef;
6469                 print <$fd>;
6470                 close $fd;
6471         }
6472 }
6473
6474 sub git_blobdiff_plain {
6475         git_blobdiff('plain');
6476 }
6477
6478 sub git_commitdiff {
6479         my %params = @_;
6480         my $format = $params{-format} || 'html';
6481
6482         my ($patch_max) = gitweb_get_feature('patches');
6483         if ($format eq 'patch') {
6484                 die_error(403, "Patch view not allowed") unless $patch_max;
6485         }
6486
6487         $hash ||= $hash_base || "HEAD";
6488         my %co = parse_commit($hash)
6489             or die_error(404, "Unknown commit object");
6490
6491         # choose format for commitdiff for merge
6492         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6493                 $hash_parent = '--cc';
6494         }
6495         # we need to prepare $formats_nav before almost any parameter munging
6496         my $formats_nav;
6497         if ($format eq 'html') {
6498                 $formats_nav =
6499                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6500                                 "raw");
6501                 if ($patch_max && @{$co{'parents'}} <= 1) {
6502                         $formats_nav .= " | " .
6503                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6504                                         "patch");
6505                 }
6506
6507                 if (defined $hash_parent &&
6508                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6509                         # commitdiff with two commits given
6510                         my $hash_parent_short = $hash_parent;
6511                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6512                                 $hash_parent_short = substr($hash_parent, 0, 7);
6513                         }
6514                         $formats_nav .=
6515                                 ' (from';
6516                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6517                                 if ($co{'parents'}[$i] eq $hash_parent) {
6518                                         $formats_nav .= ' parent ' . ($i+1);
6519                                         last;
6520                                 }
6521                         }
6522                         $formats_nav .= ': ' .
6523                                 $cgi->a({-href => href(action=>"commitdiff",
6524                                                        hash=>$hash_parent)},
6525                                         esc_html($hash_parent_short)) .
6526                                 ')';
6527                 } elsif (!$co{'parent'}) {
6528                         # --root commitdiff
6529                         $formats_nav .= ' (initial)';
6530                 } elsif (scalar @{$co{'parents'}} == 1) {
6531                         # single parent commit
6532                         $formats_nav .=
6533                                 ' (parent: ' .
6534                                 $cgi->a({-href => href(action=>"commitdiff",
6535                                                        hash=>$co{'parent'})},
6536                                         esc_html(substr($co{'parent'}, 0, 7))) .
6537                                 ')';
6538                 } else {
6539                         # merge commit
6540                         if ($hash_parent eq '--cc') {
6541                                 $formats_nav .= ' | ' .
6542                                         $cgi->a({-href => href(action=>"commitdiff",
6543                                                                hash=>$hash, hash_parent=>'-c')},
6544                                                 'combined');
6545                         } else { # $hash_parent eq '-c'
6546                                 $formats_nav .= ' | ' .
6547                                         $cgi->a({-href => href(action=>"commitdiff",
6548                                                                hash=>$hash, hash_parent=>'--cc')},
6549                                                 'compact');
6550                         }
6551                         $formats_nav .=
6552                                 ' (merge: ' .
6553                                 join(' ', map {
6554                                         $cgi->a({-href => href(action=>"commitdiff",
6555                                                                hash=>$_)},
6556                                                 esc_html(substr($_, 0, 7)));
6557                                 } @{$co{'parents'}} ) .
6558                                 ')';
6559                 }
6560         }
6561
6562         my $hash_parent_param = $hash_parent;
6563         if (!defined $hash_parent_param) {
6564                 # --cc for multiple parents, --root for parentless
6565                 $hash_parent_param =
6566                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6567         }
6568
6569         # read commitdiff
6570         my $fd;
6571         my @difftree;
6572         if ($format eq 'html') {
6573                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6574                         "--no-commit-id", "--patch-with-raw", "--full-index",
6575                         $hash_parent_param, $hash, "--"
6576                         or die_error(500, "Open git-diff-tree failed");
6577
6578                 while (my $line = <$fd>) {
6579                         chomp $line;
6580                         # empty line ends raw part of diff-tree output
6581                         last unless $line;
6582                         push @difftree, scalar parse_difftree_raw_line($line);
6583                 }
6584
6585         } elsif ($format eq 'plain') {
6586                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6587                         '-p', $hash_parent_param, $hash, "--"
6588                         or die_error(500, "Open git-diff-tree failed");
6589         } elsif ($format eq 'patch') {
6590                 # For commit ranges, we limit the output to the number of
6591                 # patches specified in the 'patches' feature.
6592                 # For single commits, we limit the output to a single patch,
6593                 # diverging from the git-format-patch default.
6594                 my @commit_spec = ();
6595                 if ($hash_parent) {
6596                         if ($patch_max > 0) {
6597                                 push @commit_spec, "-$patch_max";
6598                         }
6599                         push @commit_spec, '-n', "$hash_parent..$hash";
6600                 } else {
6601                         if ($params{-single}) {
6602                                 push @commit_spec, '-1';
6603                         } else {
6604                                 if ($patch_max > 0) {
6605                                         push @commit_spec, "-$patch_max";
6606                                 }
6607                                 push @commit_spec, "-n";
6608                         }
6609                         push @commit_spec, '--root', $hash;
6610                 }
6611                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6612                         '--encoding=utf8', '--stdout', @commit_spec
6613                         or die_error(500, "Open git-format-patch failed");
6614         } else {
6615                 die_error(400, "Unknown commitdiff format");
6616         }
6617
6618         # non-textual hash id's can be cached
6619         my $expires;
6620         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6621                 $expires = "+1d";
6622         }
6623
6624         # write commit message
6625         if ($format eq 'html') {
6626                 my $refs = git_get_references();
6627                 my $ref = format_ref_marker($refs, $co{'id'});
6628
6629                 git_header_html(undef, $expires);
6630                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6631                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6632                 print "<div class=\"title_text\">\n" .
6633                       "<table class=\"object_header\">\n";
6634                 git_print_authorship_rows(\%co);
6635                 print "</table>".
6636                       "</div>\n";
6637                 print "<div class=\"page_body\">\n";
6638                 if (@{$co{'comment'}} > 1) {
6639                         print "<div class=\"log\">\n";
6640                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6641                         print "</div>\n"; # class="log"
6642                 }
6643
6644         } elsif ($format eq 'plain') {
6645                 my $refs = git_get_references("tags");
6646                 my $tagname = git_get_rev_name_tags($hash);
6647                 my $filename = basename($project) . "-$hash.patch";
6648
6649                 print $cgi->header(
6650                         -type => 'text/plain',
6651                         -charset => 'utf-8',
6652                         -expires => $expires,
6653                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6654                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6655                 print "From: " . to_utf8($co{'author'}) . "\n";
6656                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6657                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6658
6659                 print "X-Git-Tag: $tagname\n" if $tagname;
6660                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6661
6662                 foreach my $line (@{$co{'comment'}}) {
6663                         print to_utf8($line) . "\n";
6664                 }
6665                 print "---\n\n";
6666         } elsif ($format eq 'patch') {
6667                 my $filename = basename($project) . "-$hash.patch";
6668
6669                 print $cgi->header(
6670                         -type => 'text/plain',
6671                         -charset => 'utf-8',
6672                         -expires => $expires,
6673                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6674         }
6675
6676         # write patch
6677         if ($format eq 'html') {
6678                 my $use_parents = !defined $hash_parent ||
6679                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6680                 git_difftree_body(\@difftree, $hash,
6681                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6682                 print "<br/>\n";
6683
6684                 git_patchset_body($fd, \@difftree, $hash,
6685                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6686                 close $fd;
6687                 print "</div>\n"; # class="page_body"
6688                 git_footer_html();
6689
6690         } elsif ($format eq 'plain') {
6691                 local $/ = undef;
6692                 print <$fd>;
6693                 close $fd
6694                         or print "Reading git-diff-tree failed\n";
6695         } elsif ($format eq 'patch') {
6696                 local $/ = undef;
6697                 print <$fd>;
6698                 close $fd
6699                         or print "Reading git-format-patch failed\n";
6700         }
6701 }
6702
6703 sub git_commitdiff_plain {
6704         git_commitdiff(-format => 'plain');
6705 }
6706
6707 # format-patch-style patches
6708 sub git_patch {
6709         git_commitdiff(-format => 'patch', -single => 1);
6710 }
6711
6712 sub git_patches {
6713         git_commitdiff(-format => 'patch');
6714 }
6715
6716 sub git_history {
6717         git_log_generic('history', \&git_history_body,
6718                         $hash_base, $hash_parent_base,
6719                         $file_name, $hash);
6720 }
6721
6722 sub git_search {
6723         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6724         if (!defined $searchtext) {
6725                 die_error(400, "Text field is empty");
6726         }
6727         if (!defined $hash) {
6728                 $hash = git_get_head_hash($project);
6729         }
6730         my %co = parse_commit($hash);
6731         if (!%co) {
6732                 die_error(404, "Unknown commit object");
6733         }
6734         if (!defined $page) {
6735                 $page = 0;
6736         }
6737
6738         $searchtype ||= 'commit';
6739         if ($searchtype eq 'pickaxe') {
6740                 # pickaxe may take all resources of your box and run for several minutes
6741                 # with every query - so decide by yourself how public you make this feature
6742                 gitweb_check_feature('pickaxe')
6743                     or die_error(403, "Pickaxe is disabled");
6744         }
6745         if ($searchtype eq 'grep') {
6746                 gitweb_check_feature('grep')[0]
6747                     or die_error(403, "Grep is disabled");
6748         }
6749
6750         git_header_html();
6751
6752         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6753                 my $greptype;
6754                 if ($searchtype eq 'commit') {
6755                         $greptype = "--grep=";
6756                 } elsif ($searchtype eq 'author') {
6757                         $greptype = "--author=";
6758                 } elsif ($searchtype eq 'committer') {
6759                         $greptype = "--committer=";
6760                 }
6761                 $greptype .= $searchtext;
6762                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6763                                                $greptype, '--regexp-ignore-case',
6764                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6765
6766                 my $paging_nav = '';
6767                 if ($page > 0) {
6768                         $paging_nav .=
6769                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6770                                                        searchtext=>$searchtext,
6771                                                        searchtype=>$searchtype)},
6772                                         "first");
6773                         $paging_nav .= " &sdot; " .
6774                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6775                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6776                 } else {
6777                         $paging_nav .= "first";
6778                         $paging_nav .= " &sdot; prev";
6779                 }
6780                 my $next_link = '';
6781                 if ($#commitlist >= 100) {
6782                         $next_link =
6783                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6784                                          -accesskey => "n", -title => "Alt-n"}, "next");
6785                         $paging_nav .= " &sdot; $next_link";
6786                 } else {
6787                         $paging_nav .= " &sdot; next";
6788                 }
6789
6790                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6791                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6792                 if ($page == 0 && !@commitlist) {
6793                         print "<p>No match.</p>\n";
6794                 } else {
6795                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6796                 }
6797         }
6798
6799         if ($searchtype eq 'pickaxe') {
6800                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6801                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6802
6803                 print "<table class=\"pickaxe search\">\n";
6804                 my $alternate = 1;
6805                 local $/ = "\n";
6806                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6807                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6808                         ($search_use_regexp ? '--pickaxe-regex' : ());
6809                 undef %co;
6810                 my @files;
6811                 while (my $line = <$fd>) {
6812                         chomp $line;
6813                         next unless $line;
6814
6815                         my %set = parse_difftree_raw_line($line);
6816                         if (defined $set{'commit'}) {
6817                                 # finish previous commit
6818                                 if (%co) {
6819                                         print "</td>\n" .
6820                                               "<td class=\"link\">" .
6821                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6822                                               " | " .
6823                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6824                                         print "</td>\n" .
6825                                               "</tr>\n";
6826                                 }
6827
6828                                 if ($alternate) {
6829                                         print "<tr class=\"dark\">\n";
6830                                 } else {
6831                                         print "<tr class=\"light\">\n";
6832                                 }
6833                                 $alternate ^= 1;
6834                                 %co = parse_commit($set{'commit'});
6835                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6836                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6837                                       "<td><i>$author</i></td>\n" .
6838                                       "<td>" .
6839                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6840                                               -class => "list subject"},
6841                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6842                         } elsif (defined $set{'to_id'}) {
6843                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6844
6845                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6846                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6847                                               -class => "list"},
6848                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6849                                       "<br/>\n";
6850                         }
6851                 }
6852                 close $fd;
6853
6854                 # finish last commit (warning: repetition!)
6855                 if (%co) {
6856                         print "</td>\n" .
6857                               "<td class=\"link\">" .
6858                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6859                               " | " .
6860                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6861                         print "</td>\n" .
6862                               "</tr>\n";
6863                 }
6864
6865                 print "</table>\n";
6866         }
6867
6868         if ($searchtype eq 'grep') {
6869                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6870                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6871
6872                 print "<table class=\"grep_search\">\n";
6873                 my $alternate = 1;
6874                 my $matches = 0;
6875                 local $/ = "\n";
6876                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6877                         $search_use_regexp ? ('-E', '-i') : '-F',
6878                         $searchtext, $co{'tree'};
6879                 my $lastfile = '';
6880                 while (my $line = <$fd>) {
6881                         chomp $line;
6882                         my ($file, $lno, $ltext, $binary);
6883                         last if ($matches++ > 1000);
6884                         if ($line =~ /^Binary file (.+) matches$/) {
6885                                 $file = $1;
6886                                 $binary = 1;
6887                         } else {
6888                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6889                         }
6890                         if ($file ne $lastfile) {
6891                                 $lastfile and print "</td></tr>\n";
6892                                 if ($alternate++) {
6893                                         print "<tr class=\"dark\">\n";
6894                                 } else {
6895                                         print "<tr class=\"light\">\n";
6896                                 }
6897                                 print "<td class=\"list\">".
6898                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6899                                                                file_name=>"$file"),
6900                                                 -class => "list"}, esc_path($file));
6901                                 print "</td><td>\n";
6902                                 $lastfile = $file;
6903                         }
6904                         if ($binary) {
6905                                 print "<div class=\"binary\">Binary file</div>\n";
6906                         } else {
6907                                 $ltext = untabify($ltext);
6908                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6909                                         $ltext = esc_html($1, -nbsp=>1);
6910                                         $ltext .= '<span class="match">';
6911                                         $ltext .= esc_html($2, -nbsp=>1);
6912                                         $ltext .= '</span>';
6913                                         $ltext .= esc_html($3, -nbsp=>1);
6914                                 } else {
6915                                         $ltext = esc_html($ltext, -nbsp=>1);
6916                                 }
6917                                 print "<div class=\"pre\">" .
6918                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6919                                                                file_name=>"$file").'#l'.$lno,
6920                                                 -class => "linenr"}, sprintf('%4i', $lno))
6921                                         . ' ' .  $ltext . "</div>\n";
6922                         }
6923                 }
6924                 if ($lastfile) {
6925                         print "</td></tr>\n";
6926                         if ($matches > 1000) {
6927                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6928                         }
6929                 } else {
6930                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6931                 }
6932                 close $fd;
6933
6934                 print "</table>\n";
6935         }
6936         git_footer_html();
6937 }
6938
6939 sub git_search_help {
6940         git_header_html();
6941         git_print_page_nav('','', $hash,$hash,$hash);
6942         print <<EOT;
6943 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6944 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6945 the pattern entered is recognized as the POSIX extended
6946 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6947 insensitive).</p>
6948 <dl>
6949 <dt><b>commit</b></dt>
6950 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6951 EOT
6952         my $have_grep = gitweb_check_feature('grep');
6953         if ($have_grep) {
6954                 print <<EOT;
6955 <dt><b>grep</b></dt>
6956 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6957     a different one) are searched for the given pattern. On large trees, this search can take
6958 a while and put some strain on the server, so please use it with some consideration. Note that
6959 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6960 case-sensitive.</dd>
6961 EOT
6962         }
6963         print <<EOT;
6964 <dt><b>author</b></dt>
6965 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6966 <dt><b>committer</b></dt>
6967 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6968 EOT
6969         my $have_pickaxe = gitweb_check_feature('pickaxe');
6970         if ($have_pickaxe) {
6971                 print <<EOT;
6972 <dt><b>pickaxe</b></dt>
6973 <dd>All commits that caused the string to appear or disappear from any file (changes that
6974 added, removed or "modified" the string) will be listed. This search can take a while and
6975 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6976 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6977 EOT
6978         }
6979         print "</dl>\n";
6980         git_footer_html();
6981 }
6982
6983 sub git_shortlog {
6984         git_log_generic('shortlog', \&git_shortlog_body,
6985                         $hash, $hash_parent);
6986 }
6987
6988 ## ......................................................................
6989 ## feeds (RSS, Atom; OPML)
6990
6991 sub git_feed {
6992         my $format = shift || 'atom';
6993         my $have_blame = gitweb_check_feature('blame');
6994
6995         # Atom: http://www.atomenabled.org/developers/syndication/
6996         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6997         if ($format ne 'rss' && $format ne 'atom') {
6998                 die_error(400, "Unknown web feed format");
6999         }
7000
7001         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7002         my $head = $hash || 'HEAD';
7003         my @commitlist = parse_commits($head, 150, 0, $file_name);
7004
7005         my %latest_commit;
7006         my %latest_date;
7007         my $content_type = "application/$format+xml";
7008         if (defined $cgi->http('HTTP_ACCEPT') &&
7009                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7010                 # browser (feed reader) prefers text/xml
7011                 $content_type = 'text/xml';
7012         }
7013         if (defined($commitlist[0])) {
7014                 %latest_commit = %{$commitlist[0]};
7015                 my $latest_epoch = $latest_commit{'committer_epoch'};
7016                 %latest_date   = parse_date($latest_epoch);
7017                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7018                 if (defined $if_modified) {
7019                         my $since;
7020                         if (eval { require HTTP::Date; 1; }) {
7021                                 $since = HTTP::Date::str2time($if_modified);
7022                         } elsif (eval { require Time::ParseDate; 1; }) {
7023                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7024                         }
7025                         if (defined $since && $latest_epoch <= $since) {
7026                                 print $cgi->header(
7027                                         -type => $content_type,
7028                                         -charset => 'utf-8',
7029                                         -last_modified => $latest_date{'rfc2822'},
7030                                         -status => '304 Not Modified');
7031                                 return;
7032                         }
7033                 }
7034                 print $cgi->header(
7035                         -type => $content_type,
7036                         -charset => 'utf-8',
7037                         -last_modified => $latest_date{'rfc2822'});
7038         } else {
7039                 print $cgi->header(
7040                         -type => $content_type,
7041                         -charset => 'utf-8');
7042         }
7043
7044         # Optimization: skip generating the body if client asks only
7045         # for Last-Modified date.
7046         return if ($cgi->request_method() eq 'HEAD');
7047
7048         # header variables
7049         my $title = "$site_name - $project/$action";
7050         my $feed_type = 'log';
7051         if (defined $hash) {
7052                 $title .= " - '$hash'";
7053                 $feed_type = 'branch log';
7054                 if (defined $file_name) {
7055                         $title .= " :: $file_name";
7056                         $feed_type = 'history';
7057                 }
7058         } elsif (defined $file_name) {
7059                 $title .= " - $file_name";
7060                 $feed_type = 'history';
7061         }
7062         $title .= " $feed_type";
7063         my $descr = git_get_project_description($project);
7064         if (defined $descr) {
7065                 $descr = esc_html($descr);
7066         } else {
7067                 $descr = "$project " .
7068                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7069                          " feed";
7070         }
7071         my $owner = git_get_project_owner($project);
7072         $owner = esc_html($owner);
7073
7074         #header
7075         my $alt_url;
7076         if (defined $file_name) {
7077                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7078         } elsif (defined $hash) {
7079                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7080         } else {
7081                 $alt_url = href(-full=>1, action=>"summary");
7082         }
7083         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7084         if ($format eq 'rss') {
7085                 print <<XML;
7086 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7087 <channel>
7088 XML
7089                 print "<title>$title</title>\n" .
7090                       "<link>$alt_url</link>\n" .
7091                       "<description>$descr</description>\n" .
7092                       "<language>en</language>\n" .
7093                       # project owner is responsible for 'editorial' content
7094                       "<managingEditor>$owner</managingEditor>\n";
7095                 if (defined $logo || defined $favicon) {
7096                         # prefer the logo to the favicon, since RSS
7097                         # doesn't allow both
7098                         my $img = esc_url($logo || $favicon);
7099                         print "<image>\n" .
7100                               "<url>$img</url>\n" .
7101                               "<title>$title</title>\n" .
7102                               "<link>$alt_url</link>\n" .
7103                               "</image>\n";
7104                 }
7105                 if (%latest_date) {
7106                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7107                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7108                 }
7109                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7110         } elsif ($format eq 'atom') {
7111                 print <<XML;
7112 <feed xmlns="http://www.w3.org/2005/Atom">
7113 XML
7114                 print "<title>$title</title>\n" .
7115                       "<subtitle>$descr</subtitle>\n" .
7116                       '<link rel="alternate" type="text/html" href="' .
7117                       $alt_url . '" />' . "\n" .
7118                       '<link rel="self" type="' . $content_type . '" href="' .
7119                       $cgi->self_url() . '" />' . "\n" .
7120                       "<id>" . href(-full=>1) . "</id>\n" .
7121                       # use project owner for feed author
7122                       "<author><name>$owner</name></author>\n";
7123                 if (defined $favicon) {
7124                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7125                 }
7126                 if (defined $logo_url) {
7127                         # not twice as wide as tall: 72 x 27 pixels
7128                         print "<logo>" . esc_url($logo) . "</logo>\n";
7129                 }
7130                 if (! %latest_date) {
7131                         # dummy date to keep the feed valid until commits trickle in:
7132                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7133                 } else {
7134                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7135                 }
7136                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7137         }
7138
7139         # contents
7140         for (my $i = 0; $i <= $#commitlist; $i++) {
7141                 my %co = %{$commitlist[$i]};
7142                 my $commit = $co{'id'};
7143                 # we read 150, we always show 30 and the ones more recent than 48 hours
7144                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7145                         last;
7146                 }
7147                 my %cd = parse_date($co{'author_epoch'});
7148
7149                 # get list of changed files
7150                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7151                         $co{'parent'} || "--root",
7152                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7153                         or next;
7154                 my @difftree = map { chomp; $_ } <$fd>;
7155                 close $fd
7156                         or next;
7157
7158                 # print element (entry, item)
7159                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7160                 if ($format eq 'rss') {
7161                         print "<item>\n" .
7162                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7163                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7164                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7165                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7166                               "<link>$co_url</link>\n" .
7167                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7168                               "<content:encoded>" .
7169                               "<![CDATA[\n";
7170                 } elsif ($format eq 'atom') {
7171                         print "<entry>\n" .
7172                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7173                               "<updated>$cd{'iso-8601'}</updated>\n" .
7174                               "<author>\n" .
7175                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7176                         if ($co{'author_email'}) {
7177                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7178                         }
7179                         print "</author>\n" .
7180                               # use committer for contributor
7181                               "<contributor>\n" .
7182                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7183                         if ($co{'committer_email'}) {
7184                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7185                         }
7186                         print "</contributor>\n" .
7187                               "<published>$cd{'iso-8601'}</published>\n" .
7188                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7189                               "<id>$co_url</id>\n" .
7190                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7191                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7192                 }
7193                 my $comment = $co{'comment'};
7194                 print "<pre>\n";
7195                 foreach my $line (@$comment) {
7196                         $line = esc_html($line);
7197                         print "$line\n";
7198                 }
7199                 print "</pre><ul>\n";
7200                 foreach my $difftree_line (@difftree) {
7201                         my %difftree = parse_difftree_raw_line($difftree_line);
7202                         next if !$difftree{'from_id'};
7203
7204                         my $file = $difftree{'file'} || $difftree{'to_file'};
7205
7206                         print "<li>" .
7207                               "[" .
7208                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7209                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7210                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7211                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7212                                       -title => "diff"}, 'D');
7213                         if ($have_blame) {
7214                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7215                                                              file_name=>$file, hash_base=>$commit),
7216                                               -title => "blame"}, 'B');
7217                         }
7218                         # if this is not a feed of a file history
7219                         if (!defined $file_name || $file_name ne $file) {
7220                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7221                                                              file_name=>$file, hash=>$commit),
7222                                               -title => "history"}, 'H');
7223                         }
7224                         $file = esc_path($file);
7225                         print "] ".
7226                               "$file</li>\n";
7227                 }
7228                 if ($format eq 'rss') {
7229                         print "</ul>]]>\n" .
7230                               "</content:encoded>\n" .
7231                               "</item>\n";
7232                 } elsif ($format eq 'atom') {
7233                         print "</ul>\n</div>\n" .
7234                               "</content>\n" .
7235                               "</entry>\n";
7236                 }
7237         }
7238
7239         # end of feed
7240         if ($format eq 'rss') {
7241                 print "</channel>\n</rss>\n";
7242         } elsif ($format eq 'atom') {
7243                 print "</feed>\n";
7244         }
7245 }
7246
7247 sub git_rss {
7248         git_feed('rss');
7249 }
7250
7251 sub git_atom {
7252         git_feed('atom');
7253 }
7254
7255 sub git_opml {
7256         my @list = git_get_projects_list();
7257
7258         print $cgi->header(
7259                 -type => 'text/xml',
7260                 -charset => 'utf-8',
7261                 -content_disposition => 'inline; filename="opml.xml"');
7262
7263         print <<XML;
7264 <?xml version="1.0" encoding="utf-8"?>
7265 <opml version="1.0">
7266 <head>
7267   <title>$site_name OPML Export</title>
7268 </head>
7269 <body>
7270 <outline text="git RSS feeds">
7271 XML
7272
7273         foreach my $pr (@list) {
7274                 my %proj = %$pr;
7275                 my $head = git_get_head_hash($proj{'path'});
7276                 if (!defined $head) {
7277                         next;
7278                 }
7279                 $git_dir = "$projectroot/$proj{'path'}";
7280                 my %co = parse_commit($head);
7281                 if (!%co) {
7282                         next;
7283                 }
7284
7285                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7286                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7287                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7288                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7289         }
7290         print <<XML;
7291 </outline>
7292 </body>
7293 </opml>
7294 XML
7295 }