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

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