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 print_local_time {
3800         print format_local_time(@_);
3801 }
3802
3803 sub format_local_time {
3804         my $localtime = '';
3805         my %date = @_;
3806         if ($date{'hour_local'} < 6) {
3807                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3808                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3809         } else {
3810                 $localtime .= sprintf(" (%02d:%02d %s)",
3811                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3812         }
3813
3814         return $localtime;
3815 }
3816
3817 # Outputs the author name and date in long form
3818 sub git_print_authorship {
3819         my $co = shift;
3820         my %opts = @_;
3821         my $tag = $opts{-tag} || 'div';
3822         my $author = $co->{'author_name'};
3823
3824         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3825         print "<$tag class=\"author_date\">" .
3826               format_search_author($author, "author", esc_html($author)) .
3827               " [$ad{'rfc2822'}";
3828         print_local_time(%ad) if ($opts{-localtime});
3829         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3830                   . "</$tag>\n";
3831 }
3832
3833 # Outputs table rows containing the full author or committer information,
3834 # in the format expected for 'commit' view (& similar).
3835 # Parameters are a commit hash reference, followed by the list of people
3836 # to output information for. If the list is empty it defaults to both
3837 # author and committer.
3838 sub git_print_authorship_rows {
3839         my $co = shift;
3840         # too bad we can't use @people = @_ || ('author', 'committer')
3841         my @people = @_;
3842         @people = ('author', 'committer') unless @people;
3843         foreach my $who (@people) {
3844                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3845                 print "<tr><td>$who</td><td>" .
3846                       format_search_author($co->{"${who}_name"}, $who,
3847                                esc_html($co->{"${who}_name"})) . " " .
3848                       format_search_author($co->{"${who}_email"}, $who,
3849                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3850                       "</td><td rowspan=\"2\">" .
3851                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3852                       "</td></tr>\n" .
3853                       "<tr>" .
3854                       "<td></td><td> $wd{'rfc2822'}";
3855                 print_local_time(%wd);
3856                 print "</td>" .
3857                       "</tr>\n";
3858         }
3859 }
3860
3861 sub git_print_page_path {
3862         my $name = shift;
3863         my $type = shift;
3864         my $hb = shift;
3865
3866
3867         print "<div class=\"page_path\">";
3868         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3869                       -title => 'tree root'}, to_utf8("[$project]"));
3870         print " / ";
3871         if (defined $name) {
3872                 my @dirname = split '/', $name;
3873                 my $basename = pop @dirname;
3874                 my $fullname = '';
3875
3876                 foreach my $dir (@dirname) {
3877                         $fullname .= ($fullname ? '/' : '') . $dir;
3878                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3879                                                      hash_base=>$hb),
3880                                       -title => $fullname}, esc_path($dir));
3881                         print " / ";
3882                 }
3883                 if (defined $type && $type eq 'blob') {
3884                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3885                                                      hash_base=>$hb),
3886                                       -title => $name}, esc_path($basename));
3887                 } elsif (defined $type && $type eq 'tree') {
3888                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3889                                                      hash_base=>$hb),
3890                                       -title => $name}, esc_path($basename));
3891                         print " / ";
3892                 } else {
3893                         print esc_path($basename);
3894                 }
3895         }
3896         print "<br/></div>\n";
3897 }
3898
3899 sub git_print_log {
3900         my $log = shift;
3901         my %opts = @_;
3902
3903         if ($opts{'-remove_title'}) {
3904                 # remove title, i.e. first line of log
3905                 shift @$log;
3906         }
3907         # remove leading empty lines
3908         while (defined $log->[0] && $log->[0] eq "") {
3909                 shift @$log;
3910         }
3911
3912         # print log
3913         my $signoff = 0;
3914         my $empty = 0;
3915         foreach my $line (@$log) {
3916                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3917                         $signoff = 1;
3918                         $empty = 0;
3919                         if (! $opts{'-remove_signoff'}) {
3920                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3921                                 next;
3922                         } else {
3923                                 # remove signoff lines
3924                                 next;
3925                         }
3926                 } else {
3927                         $signoff = 0;
3928                 }
3929
3930                 # print only one empty line
3931                 # do not print empty line after signoff
3932                 if ($line eq "") {
3933                         next if ($empty || $signoff);
3934                         $empty = 1;
3935                 } else {
3936                         $empty = 0;
3937                 }
3938
3939                 print format_log_line_html($line) . "<br/>\n";
3940         }
3941
3942         if ($opts{'-final_empty_line'}) {
3943                 # end with single empty line
3944                 print "<br/>\n" unless $empty;
3945         }
3946 }
3947
3948 # return link target (what link points to)
3949 sub git_get_link_target {
3950         my $hash = shift;
3951         my $link_target;
3952
3953         # read link
3954         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3955                 or return;
3956         {
3957                 local $/ = undef;
3958                 $link_target = <$fd>;
3959         }
3960         close $fd
3961                 or return;
3962
3963         return $link_target;
3964 }
3965
3966 # given link target, and the directory (basedir) the link is in,
3967 # return target of link relative to top directory (top tree);
3968 # return undef if it is not possible (including absolute links).
3969 sub normalize_link_target {
3970         my ($link_target, $basedir) = @_;
3971
3972         # absolute symlinks (beginning with '/') cannot be normalized
3973         return if (substr($link_target, 0, 1) eq '/');
3974
3975         # normalize link target to path from top (root) tree (dir)
3976         my $path;
3977         if ($basedir) {
3978                 $path = $basedir . '/' . $link_target;
3979         } else {
3980                 # we are in top (root) tree (dir)
3981                 $path = $link_target;
3982         }
3983
3984         # remove //, /./, and /../
3985         my @path_parts;
3986         foreach my $part (split('/', $path)) {
3987                 # discard '.' and ''
3988                 next if (!$part || $part eq '.');
3989                 # handle '..'
3990                 if ($part eq '..') {
3991                         if (@path_parts) {
3992                                 pop @path_parts;
3993                         } else {
3994                                 # link leads outside repository (outside top dir)
3995                                 return;
3996                         }
3997                 } else {
3998                         push @path_parts, $part;
3999                 }
4000         }
4001         $path = join('/', @path_parts);
4002
4003         return $path;
4004 }
4005
4006 # print tree entry (row of git_tree), but without encompassing <tr> element
4007 sub git_print_tree_entry {
4008         my ($t, $basedir, $hash_base, $have_blame) = @_;
4009
4010         my %base_key = ();
4011         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4012
4013         # The format of a table row is: mode list link.  Where mode is
4014         # the mode of the entry, list is the name of the entry, an href,
4015         # and link is the action links of the entry.
4016
4017         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4018         if (exists $t->{'size'}) {
4019                 print "<td class=\"size\">$t->{'size'}</td>\n";
4020         }
4021         if ($t->{'type'} eq "blob") {
4022                 print "<td class=\"list\">" .
4023                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4024                                                file_name=>"$basedir$t->{'name'}", %base_key),
4025                                 -class => "list"}, esc_path($t->{'name'}));
4026                 if (S_ISLNK(oct $t->{'mode'})) {
4027                         my $link_target = git_get_link_target($t->{'hash'});
4028                         if ($link_target) {
4029                                 my $norm_target = normalize_link_target($link_target, $basedir);
4030                                 if (defined $norm_target) {
4031                                         print " -> " .
4032                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4033                                                                      file_name=>$norm_target),
4034                                                        -title => $norm_target}, esc_path($link_target));
4035                                 } else {
4036                                         print " -> " . esc_path($link_target);
4037                                 }
4038                         }
4039                 }
4040                 print "</td>\n";
4041                 print "<td class=\"link\">";
4042                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4043                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4044                               "blob");
4045                 if ($have_blame) {
4046                         print " | " .
4047                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4048                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4049                                       "blame");
4050                 }
4051                 if (defined $hash_base) {
4052                         print " | " .
4053                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4054                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4055                                       "history");
4056                 }
4057                 print " | " .
4058                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4059                                                file_name=>"$basedir$t->{'name'}")},
4060                                 "raw");
4061                 print "</td>\n";
4062
4063         } elsif ($t->{'type'} eq "tree") {
4064                 print "<td class=\"list\">";
4065                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4066                                              file_name=>"$basedir$t->{'name'}",
4067                                              %base_key)},
4068                               esc_path($t->{'name'}));
4069                 print "</td>\n";
4070                 print "<td class=\"link\">";
4071                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4072                                              file_name=>"$basedir$t->{'name'}",
4073                                              %base_key)},
4074                               "tree");
4075                 if (defined $hash_base) {
4076                         print " | " .
4077                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4078                                                      file_name=>"$basedir$t->{'name'}")},
4079                                       "history");
4080                 }
4081                 print "</td>\n";
4082         } else {
4083                 # unknown object: we can only present history for it
4084                 # (this includes 'commit' object, i.e. submodule support)
4085                 print "<td class=\"list\">" .
4086                       esc_path($t->{'name'}) .
4087                       "</td>\n";
4088                 print "<td class=\"link\">";
4089                 if (defined $hash_base) {
4090                         print $cgi->a({-href => href(action=>"history",
4091                                                      hash_base=>$hash_base,
4092                                                      file_name=>"$basedir$t->{'name'}")},
4093                                       "history");
4094                 }
4095                 print "</td>\n";
4096         }
4097 }
4098
4099 ## ......................................................................
4100 ## functions printing large fragments of HTML
4101
4102 # get pre-image filenames for merge (combined) diff
4103 sub fill_from_file_info {
4104         my ($diff, @parents) = @_;
4105
4106         $diff->{'from_file'} = [ ];
4107         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4108         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4109                 if ($diff->{'status'}[$i] eq 'R' ||
4110                     $diff->{'status'}[$i] eq 'C') {
4111                         $diff->{'from_file'}[$i] =
4112                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4113                 }
4114         }
4115
4116         return $diff;
4117 }
4118
4119 # is current raw difftree line of file deletion
4120 sub is_deleted {
4121         my $diffinfo = shift;
4122
4123         return $diffinfo->{'to_id'} eq ('0' x 40);
4124 }
4125
4126 # does patch correspond to [previous] difftree raw line
4127 # $diffinfo  - hashref of parsed raw diff format
4128 # $patchinfo - hashref of parsed patch diff format
4129 #              (the same keys as in $diffinfo)
4130 sub is_patch_split {
4131         my ($diffinfo, $patchinfo) = @_;
4132
4133         return defined $diffinfo && defined $patchinfo
4134                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4135 }
4136
4137
4138 sub git_difftree_body {
4139         my ($difftree, $hash, @parents) = @_;
4140         my ($parent) = $parents[0];
4141         my $have_blame = gitweb_check_feature('blame');
4142         print "<div class=\"list_head\">\n";
4143         if ($#{$difftree} > 10) {
4144                 print(($#{$difftree} + 1) . " files changed:\n");
4145         }
4146         print "</div>\n";
4147
4148         print "<table class=\"" .
4149               (@parents > 1 ? "combined " : "") .
4150               "diff_tree\">\n";
4151
4152         # header only for combined diff in 'commitdiff' view
4153         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4154         if ($has_header) {
4155                 # table header
4156                 print "<thead><tr>\n" .
4157                        "<th></th><th></th>\n"; # filename, patchN link
4158                 for (my $i = 0; $i < @parents; $i++) {
4159                         my $par = $parents[$i];
4160                         print "<th>" .
4161                               $cgi->a({-href => href(action=>"commitdiff",
4162                                                      hash=>$hash, hash_parent=>$par),
4163                                        -title => 'commitdiff to parent number ' .
4164                                                   ($i+1) . ': ' . substr($par,0,7)},
4165                                       $i+1) .
4166                               "&nbsp;</th>\n";
4167                 }
4168                 print "</tr></thead>\n<tbody>\n";
4169         }
4170
4171         my $alternate = 1;
4172         my $patchno = 0;
4173         foreach my $line (@{$difftree}) {
4174                 my $diff = parsed_difftree_line($line);
4175
4176                 if ($alternate) {
4177                         print "<tr class=\"dark\">\n";
4178                 } else {
4179                         print "<tr class=\"light\">\n";
4180                 }
4181                 $alternate ^= 1;
4182
4183                 if (exists $diff->{'nparents'}) { # combined diff
4184
4185                         fill_from_file_info($diff, @parents)
4186                                 unless exists $diff->{'from_file'};
4187
4188                         if (!is_deleted($diff)) {
4189                                 # file exists in the result (child) commit
4190                                 print "<td>" .
4191                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4192                                                              file_name=>$diff->{'to_file'},
4193                                                              hash_base=>$hash),
4194                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4195                                       "</td>\n";
4196                         } else {
4197                                 print "<td>" .
4198                                       esc_path($diff->{'to_file'}) .
4199                                       "</td>\n";
4200                         }
4201
4202                         if ($action eq 'commitdiff') {
4203                                 # link to patch
4204                                 $patchno++;
4205                                 print "<td class=\"link\">" .
4206                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4207                                       " | " .
4208                                       "</td>\n";
4209                         }
4210
4211                         my $has_history = 0;
4212                         my $not_deleted = 0;
4213                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4214                                 my $hash_parent = $parents[$i];
4215                                 my $from_hash = $diff->{'from_id'}[$i];
4216                                 my $from_path = $diff->{'from_file'}[$i];
4217                                 my $status = $diff->{'status'}[$i];
4218
4219                                 $has_history ||= ($status ne 'A');
4220                                 $not_deleted ||= ($status ne 'D');
4221
4222                                 if ($status eq 'A') {
4223                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4224                                 } elsif ($status eq 'D') {
4225                                         print "<td class=\"link\">" .
4226                                               $cgi->a({-href => href(action=>"blob",
4227                                                                      hash_base=>$hash,
4228                                                                      hash=>$from_hash,
4229                                                                      file_name=>$from_path)},
4230                                                       "blob" . ($i+1)) .
4231                                               " | </td>\n";
4232                                 } else {
4233                                         if ($diff->{'to_id'} eq $from_hash) {
4234                                                 print "<td class=\"link nochange\">";
4235                                         } else {
4236                                                 print "<td class=\"link\">";
4237                                         }
4238                                         print $cgi->a({-href => href(action=>"blobdiff",
4239                                                                      hash=>$diff->{'to_id'},
4240                                                                      hash_parent=>$from_hash,
4241                                                                      hash_base=>$hash,
4242                                                                      hash_parent_base=>$hash_parent,
4243                                                                      file_name=>$diff->{'to_file'},
4244                                                                      file_parent=>$from_path)},
4245                                                       "diff" . ($i+1)) .
4246                                               " | </td>\n";
4247                                 }
4248                         }
4249
4250                         print "<td class=\"link\">";
4251                         if ($not_deleted) {
4252                                 print $cgi->a({-href => href(action=>"blob",
4253                                                              hash=>$diff->{'to_id'},
4254                                                              file_name=>$diff->{'to_file'},
4255                                                              hash_base=>$hash)},
4256                                               "blob");
4257                                 print " | " if ($has_history);
4258                         }
4259                         if ($has_history) {
4260                                 print $cgi->a({-href => href(action=>"history",
4261                                                              file_name=>$diff->{'to_file'},
4262                                                              hash_base=>$hash)},
4263                                               "history");
4264                         }
4265                         print "</td>\n";
4266
4267                         print "</tr>\n";
4268                         next; # instead of 'else' clause, to avoid extra indent
4269                 }
4270                 # else ordinary diff
4271
4272                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4273                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4274                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4275                         $to_mode_oct = oct $diff->{'to_mode'};
4276                         if (S_ISREG($to_mode_oct)) { # only for regular file
4277                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4278                         }
4279                         $to_file_type = file_type($diff->{'to_mode'});
4280                 }
4281                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4282                         $from_mode_oct = oct $diff->{'from_mode'};
4283                         if (S_ISREG($to_mode_oct)) { # only for regular file
4284                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4285                         }
4286                         $from_file_type = file_type($diff->{'from_mode'});
4287                 }
4288
4289                 if ($diff->{'status'} eq "A") { # created
4290                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4291                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4292                         $mode_chng   .= "]</span>";
4293                         print "<td>";
4294                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4295                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4296                                       -class => "list"}, esc_path($diff->{'file'}));
4297                         print "</td>\n";
4298                         print "<td>$mode_chng</td>\n";
4299                         print "<td class=\"link\">";
4300                         if ($action eq 'commitdiff') {
4301                                 # link to patch
4302                                 $patchno++;
4303                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4304                                 print " | ";
4305                         }
4306                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4307                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4308                                       "blob");
4309                         print "</td>\n";
4310
4311                 } elsif ($diff->{'status'} eq "D") { # deleted
4312                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4313                         print "<td>";
4314                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4315                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4316                                        -class => "list"}, esc_path($diff->{'file'}));
4317                         print "</td>\n";
4318                         print "<td>$mode_chng</td>\n";
4319                         print "<td class=\"link\">";
4320                         if ($action eq 'commitdiff') {
4321                                 # link to patch
4322                                 $patchno++;
4323                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4324                                 print " | ";
4325                         }
4326                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4327                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4328                                       "blob") . " | ";
4329                         if ($have_blame) {
4330                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4331                                                              file_name=>$diff->{'file'})},
4332                                               "blame") . " | ";
4333                         }
4334                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4335                                                      file_name=>$diff->{'file'})},
4336                                       "history");
4337                         print "</td>\n";
4338
4339                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4340                         my $mode_chnge = "";
4341                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4342                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4343                                 if ($from_file_type ne $to_file_type) {
4344                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4345                                 }
4346                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4347                                         if ($from_mode_str && $to_mode_str) {
4348                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4349                                         } elsif ($to_mode_str) {
4350                                                 $mode_chnge .= " mode: $to_mode_str";
4351                                         }
4352                                 }
4353                                 $mode_chnge .= "]</span>\n";
4354                         }
4355                         print "<td>";
4356                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4357                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4358                                       -class => "list"}, esc_path($diff->{'file'}));
4359                         print "</td>\n";
4360                         print "<td>$mode_chnge</td>\n";
4361                         print "<td class=\"link\">";
4362                         if ($action eq 'commitdiff') {
4363                                 # link to patch
4364                                 $patchno++;
4365                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4366                                       " | ";
4367                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4368                                 # "commit" view and modified file (not onlu mode changed)
4369                                 print $cgi->a({-href => href(action=>"blobdiff",
4370                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4371                                                              hash_base=>$hash, hash_parent_base=>$parent,
4372                                                              file_name=>$diff->{'file'})},
4373                                               "diff") .
4374                                       " | ";
4375                         }
4376                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4377                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4378                                        "blob") . " | ";
4379                         if ($have_blame) {
4380                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4381                                                              file_name=>$diff->{'file'})},
4382                                               "blame") . " | ";
4383                         }
4384                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4385                                                      file_name=>$diff->{'file'})},
4386                                       "history");
4387                         print "</td>\n";
4388
4389                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4390                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4391                         my $nstatus = $status_name{$diff->{'status'}};
4392                         my $mode_chng = "";
4393                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4394                                 # mode also for directories, so we cannot use $to_mode_str
4395                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4396                         }
4397                         print "<td>" .
4398                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4399                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4400                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4401                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4402                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4403                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4404                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4405                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4406                               "<td class=\"link\">";
4407                         if ($action eq 'commitdiff') {
4408                                 # link to patch
4409                                 $patchno++;
4410                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4411                                       " | ";
4412                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4413                                 # "commit" view and modified file (not only pure rename or copy)
4414                                 print $cgi->a({-href => href(action=>"blobdiff",
4415                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4416                                                              hash_base=>$hash, hash_parent_base=>$parent,
4417                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4418                                               "diff") .
4419                                       " | ";
4420                         }
4421                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4422                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4423                                       "blob") . " | ";
4424                         if ($have_blame) {
4425                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4426                                                              file_name=>$diff->{'to_file'})},
4427                                               "blame") . " | ";
4428                         }
4429                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4430                                                     file_name=>$diff->{'to_file'})},
4431                                       "history");
4432                         print "</td>\n";
4433
4434                 } # we should not encounter Unmerged (U) or Unknown (X) status
4435                 print "</tr>\n";
4436         }
4437         print "</tbody>" if $has_header;
4438         print "</table>\n";
4439 }
4440
4441 sub git_patchset_body {
4442         my ($fd, $difftree, $hash, @hash_parents) = @_;
4443         my ($hash_parent) = $hash_parents[0];
4444
4445         my $is_combined = (@hash_parents > 1);
4446         my $patch_idx = 0;
4447         my $patch_number = 0;
4448         my $patch_line;
4449         my $diffinfo;
4450         my $to_name;
4451         my (%from, %to);
4452
4453         print "<div class=\"patchset\">\n";
4454
4455         # skip to first patch
4456         while ($patch_line = <$fd>) {
4457                 chomp $patch_line;
4458
4459                 last if ($patch_line =~ m/^diff /);
4460         }
4461
4462  PATCH:
4463         while ($patch_line) {
4464
4465                 # parse "git diff" header line
4466                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4467                         # $1 is from_name, which we do not use
4468                         $to_name = unquote($2);
4469                         $to_name =~ s!^b/!!;
4470                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4471                         # $1 is 'cc' or 'combined', which we do not use
4472                         $to_name = unquote($2);
4473                 } else {
4474                         $to_name = undef;
4475                 }
4476
4477                 # check if current patch belong to current raw line
4478                 # and parse raw git-diff line if needed
4479                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4480                         # this is continuation of a split patch
4481                         print "<div class=\"patch cont\">\n";
4482                 } else {
4483                         # advance raw git-diff output if needed
4484                         $patch_idx++ if defined $diffinfo;
4485
4486                         # read and prepare patch information
4487                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4488
4489                         # compact combined diff output can have some patches skipped
4490                         # find which patch (using pathname of result) we are at now;
4491                         if ($is_combined) {
4492                                 while ($to_name ne $diffinfo->{'to_file'}) {
4493                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4494                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4495                                               "</div>\n";  # class="patch"
4496
4497                                         $patch_idx++;
4498                                         $patch_number++;
4499
4500                                         last if $patch_idx > $#$difftree;
4501                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4502                                 }
4503                         }
4504
4505                         # modifies %from, %to hashes
4506                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4507
4508                         # this is first patch for raw difftree line with $patch_idx index
4509                         # we index @$difftree array from 0, but number patches from 1
4510                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4511                 }
4512
4513                 # git diff header
4514                 #assert($patch_line =~ m/^diff /) if DEBUG;
4515                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4516                 $patch_number++;
4517                 # print "git diff" header
4518                 print format_git_diff_header_line($patch_line, $diffinfo,
4519                                                   \%from, \%to);
4520
4521                 # print extended diff header
4522                 print "<div class=\"diff extended_header\">\n";
4523         EXTENDED_HEADER:
4524                 while ($patch_line = <$fd>) {
4525                         chomp $patch_line;
4526
4527                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4528
4529                         print format_extended_diff_header_line($patch_line, $diffinfo,
4530                                                                \%from, \%to);
4531                 }
4532                 print "</div>\n"; # class="diff extended_header"
4533
4534                 # from-file/to-file diff header
4535                 if (! $patch_line) {
4536                         print "</div>\n"; # class="patch"
4537                         last PATCH;
4538                 }
4539                 next PATCH if ($patch_line =~ m/^diff /);
4540                 #assert($patch_line =~ m/^---/) if DEBUG;
4541
4542                 my $last_patch_line = $patch_line;
4543                 $patch_line = <$fd>;
4544                 chomp $patch_line;
4545                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4546
4547                 print format_diff_from_to_header($last_patch_line, $patch_line,
4548                                                  $diffinfo, \%from, \%to,
4549                                                  @hash_parents);
4550
4551                 # the patch itself
4552         LINE:
4553                 while ($patch_line = <$fd>) {
4554                         chomp $patch_line;
4555
4556                         next PATCH if ($patch_line =~ m/^diff /);
4557
4558                         print format_diff_line($patch_line, \%from, \%to);
4559                 }
4560
4561         } continue {
4562                 print "</div>\n"; # class="patch"
4563         }
4564
4565         # for compact combined (--cc) format, with chunk and patch simplification
4566         # the patchset might be empty, but there might be unprocessed raw lines
4567         for (++$patch_idx if $patch_number > 0;
4568              $patch_idx < @$difftree;
4569              ++$patch_idx) {
4570                 # read and prepare patch information
4571                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4572
4573                 # generate anchor for "patch" links in difftree / whatchanged part
4574                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4575                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4576                       "</div>\n";  # class="patch"
4577
4578                 $patch_number++;
4579         }
4580
4581         if ($patch_number == 0) {
4582                 if (@hash_parents > 1) {
4583                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4584                 } else {
4585                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4586                 }
4587         }
4588
4589         print "</div>\n"; # class="patchset"
4590 }
4591
4592 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4593
4594 # fills project list info (age, description, owner, forks) for each
4595 # project in the list, removing invalid projects from returned list
4596 # NOTE: modifies $projlist, but does not remove entries from it
4597 sub fill_project_list_info {
4598         my ($projlist, $check_forks) = @_;
4599         my @projects;
4600
4601         my $show_ctags = gitweb_check_feature('ctags');
4602  PROJECT:
4603         foreach my $pr (@$projlist) {
4604                 my (@activity) = git_get_last_activity($pr->{'path'});
4605                 unless (@activity) {
4606                         next PROJECT;
4607                 }
4608                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4609                 if (!defined $pr->{'descr'}) {
4610                         my $descr = git_get_project_description($pr->{'path'}) || "";
4611                         $descr = to_utf8($descr);
4612                         $pr->{'descr_long'} = $descr;
4613                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4614                 }
4615                 if (!defined $pr->{'owner'}) {
4616                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4617                 }
4618                 if ($check_forks) {
4619                         my $pname = $pr->{'path'};
4620                         if (($pname =~ s/\.git$//) &&
4621                             ($pname !~ /\/$/) &&
4622                             (-d "$projectroot/$pname")) {
4623                                 $pr->{'forks'} = "-d $projectroot/$pname";
4624                         } else {
4625                                 $pr->{'forks'} = 0;
4626                         }
4627                 }
4628                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4629                 push @projects, $pr;
4630         }
4631
4632         return @projects;
4633 }
4634
4635 # print 'sort by' <th> element, generating 'sort by $name' replay link
4636 # if that order is not selected
4637 sub print_sort_th {
4638         print format_sort_th(@_);
4639 }
4640
4641 sub format_sort_th {
4642         my ($name, $order, $header) = @_;
4643         my $sort_th = "";
4644         $header ||= ucfirst($name);
4645
4646         if ($order eq $name) {
4647                 $sort_th .= "<th>$header</th>\n";
4648         } else {
4649                 $sort_th .= "<th>" .
4650                             $cgi->a({-href => href(-replay=>1, order=>$name),
4651                                      -class => "header"}, $header) .
4652                             "</th>\n";
4653         }
4654
4655         return $sort_th;
4656 }
4657
4658 sub git_project_list_body {
4659         # actually uses global variable $project
4660         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4661
4662         my $check_forks = gitweb_check_feature('forks');
4663         my @projects = fill_project_list_info($projlist, $check_forks);
4664
4665         $order ||= $default_projects_order;
4666         $from = 0 unless defined $from;
4667         $to = $#projects if (!defined $to || $#projects < $to);
4668
4669         my %order_info = (
4670                 project => { key => 'path', type => 'str' },
4671                 descr => { key => 'descr_long', type => 'str' },
4672                 owner => { key => 'owner', type => 'str' },
4673                 age => { key => 'age', type => 'num' }
4674         );
4675         my $oi = $order_info{$order};
4676         if ($oi->{'type'} eq 'str') {
4677                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4678         } else {
4679                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4680         }
4681
4682         my $show_ctags = gitweb_check_feature('ctags');
4683         if ($show_ctags) {
4684                 my %ctags;
4685                 foreach my $p (@projects) {
4686                         foreach my $ct (keys %{$p->{'ctags'}}) {
4687                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4688                         }
4689                 }
4690                 my $cloud = git_populate_project_tagcloud(\%ctags);
4691                 print git_show_project_tagcloud($cloud, 64);
4692         }
4693
4694         print "<table class=\"project_list\">\n";
4695         unless ($no_header) {
4696                 print "<tr>\n";
4697                 if ($check_forks) {
4698                         print "<th></th>\n";
4699                 }
4700                 print_sort_th('project', $order, 'Project');
4701                 print_sort_th('descr', $order, 'Description');
4702                 print_sort_th('owner', $order, 'Owner');
4703                 print_sort_th('age', $order, 'Last Change');
4704                 print "<th></th>\n" . # for links
4705                       "</tr>\n";
4706         }
4707         my $alternate = 1;
4708         my $tagfilter = $cgi->param('by_tag');
4709         for (my $i = $from; $i <= $to; $i++) {
4710                 my $pr = $projects[$i];
4711
4712                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4713                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4714                         and not $pr->{'descr_long'} =~ /$searchtext/;
4715                 # Weed out forks or non-matching entries of search
4716                 if ($check_forks) {
4717                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4718                         $forkbase="^$forkbase" if $forkbase;
4719                         next if not $searchtext and not $tagfilter and $show_ctags
4720                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4721                 }
4722
4723                 if ($alternate) {
4724                         print "<tr class=\"dark\">\n";
4725                 } else {
4726                         print "<tr class=\"light\">\n";
4727                 }
4728                 $alternate ^= 1;
4729                 if ($check_forks) {
4730                         print "<td>";
4731                         if ($pr->{'forks'}) {
4732                                 print "<!-- $pr->{'forks'} -->\n";
4733                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4734                         }
4735                         print "</td>\n";
4736                 }
4737                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4738                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4739                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4740                                         -class => "list", -title => $pr->{'descr_long'}},
4741                                         esc_html($pr->{'descr'})) . "</td>\n" .
4742                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4743                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4744                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4745                       "<td class=\"link\">" .
4746                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4747                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4748                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4749                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4750                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4751                       "</td>\n" .
4752                       "</tr>\n";
4753         }
4754         if (defined $extra) {
4755                 print "<tr>\n";
4756                 if ($check_forks) {
4757                         print "<td></td>\n";
4758                 }
4759                 print "<td colspan=\"5\">$extra</td>\n" .
4760                       "</tr>\n";
4761         }
4762         print "</table>\n";
4763 }
4764
4765 sub git_log_body {
4766         # uses global variable $project
4767         my ($commitlist, $from, $to, $refs, $extra) = @_;
4768
4769         $from = 0 unless defined $from;
4770         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4771
4772         for (my $i = 0; $i <= $to; $i++) {
4773                 my %co = %{$commitlist->[$i]};
4774                 next if !%co;
4775                 my $commit = $co{'id'};
4776                 my $ref = format_ref_marker($refs, $commit);
4777                 my %ad = parse_date($co{'author_epoch'});
4778                 git_print_header_div('commit',
4779                                "<span class=\"age\">$co{'age_string'}</span>" .
4780                                esc_html($co{'title'}) . $ref,
4781                                $commit);
4782                 print "<div class=\"title_text\">\n" .
4783                       "<div class=\"log_link\">\n" .
4784                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4785                       " | " .
4786                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4787                       " | " .
4788                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4789                       "<br/>\n" .
4790                       "</div>\n";
4791                       git_print_authorship(\%co, -tag => 'span');
4792                       print "<br/>\n</div>\n";
4793
4794                 print "<div class=\"log_body\">\n";
4795                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4796                 print "</div>\n";
4797         }
4798         if ($extra) {
4799                 print "<div class=\"page_nav\">\n";
4800                 print "$extra\n";
4801                 print "</div>\n";
4802         }
4803 }
4804
4805 sub git_shortlog_body {
4806         # uses global variable $project
4807         my ($commitlist, $from, $to, $refs, $extra) = @_;
4808
4809         $from = 0 unless defined $from;
4810         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4811
4812         print "<table class=\"shortlog\">\n";
4813         my $alternate = 1;
4814         for (my $i = $from; $i <= $to; $i++) {
4815                 my %co = %{$commitlist->[$i]};
4816                 my $commit = $co{'id'};
4817                 my $ref = format_ref_marker($refs, $commit);
4818                 if ($alternate) {
4819                         print "<tr class=\"dark\">\n";
4820                 } else {
4821                         print "<tr class=\"light\">\n";
4822                 }
4823                 $alternate ^= 1;
4824                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4825                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4826                       format_author_html('td', \%co, 10) . "<td>";
4827                 print format_subject_html($co{'title'}, $co{'title_short'},
4828                                           href(action=>"commit", hash=>$commit), $ref);
4829                 print "</td>\n" .
4830                       "<td class=\"link\">" .
4831                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4832                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4833                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4834                 my $snapshot_links = format_snapshot_links($commit);
4835                 if (defined $snapshot_links) {
4836                         print " | " . $snapshot_links;
4837                 }
4838                 print "</td>\n" .
4839                       "</tr>\n";
4840         }
4841         if (defined $extra) {
4842                 print "<tr>\n" .
4843                       "<td colspan=\"4\">$extra</td>\n" .
4844                       "</tr>\n";
4845         }
4846         print "</table>\n";
4847 }
4848
4849 sub git_history_body {
4850         # Warning: assumes constant type (blob or tree) during history
4851         my ($commitlist, $from, $to, $refs, $extra,
4852             $file_name, $file_hash, $ftype) = @_;
4853
4854         $from = 0 unless defined $from;
4855         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4856
4857         print "<table class=\"history\">\n";
4858         my $alternate = 1;
4859         for (my $i = $from; $i <= $to; $i++) {
4860                 my %co = %{$commitlist->[$i]};
4861                 if (!%co) {
4862                         next;
4863                 }
4864                 my $commit = $co{'id'};
4865
4866                 my $ref = format_ref_marker($refs, $commit);
4867
4868                 if ($alternate) {
4869                         print "<tr class=\"dark\">\n";
4870                 } else {
4871                         print "<tr class=\"light\">\n";
4872                 }
4873                 $alternate ^= 1;
4874                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4875         # shortlog:   format_author_html('td', \%co, 10)
4876                       format_author_html('td', \%co, 15, 3) . "<td>";
4877                 # originally git_history used chop_str($co{'title'}, 50)
4878                 print format_subject_html($co{'title'}, $co{'title_short'},
4879                                           href(action=>"commit", hash=>$commit), $ref);
4880                 print "</td>\n" .
4881                       "<td class=\"link\">" .
4882                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4883                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4884
4885                 if ($ftype eq 'blob') {
4886                         my $blob_current = $file_hash;
4887                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4888                         if (defined $blob_current && defined $blob_parent &&
4889                                         $blob_current ne $blob_parent) {
4890                                 print " | " .
4891                                         $cgi->a({-href => href(action=>"blobdiff",
4892                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4893                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4894                                                                file_name=>$file_name)},
4895                                                 "diff to current");
4896                         }
4897                 }
4898                 print "</td>\n" .
4899                       "</tr>\n";
4900         }
4901         if (defined $extra) {
4902                 print "<tr>\n" .
4903                       "<td colspan=\"4\">$extra</td>\n" .
4904                       "</tr>\n";
4905         }
4906         print "</table>\n";
4907 }
4908
4909 sub git_tags_body {
4910         # uses global variable $project
4911         my ($taglist, $from, $to, $extra) = @_;
4912         $from = 0 unless defined $from;
4913         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4914
4915         print "<table class=\"tags\">\n";
4916         my $alternate = 1;
4917         for (my $i = $from; $i <= $to; $i++) {
4918                 my $entry = $taglist->[$i];
4919                 my %tag = %$entry;
4920                 my $comment = $tag{'subject'};
4921                 my $comment_short;
4922                 if (defined $comment) {
4923                         $comment_short = chop_str($comment, 30, 5);
4924                 }
4925                 if ($alternate) {
4926                         print "<tr class=\"dark\">\n";
4927                 } else {
4928                         print "<tr class=\"light\">\n";
4929                 }
4930                 $alternate ^= 1;
4931                 if (defined $tag{'age'}) {
4932                         print "<td><i>$tag{'age'}</i></td>\n";
4933                 } else {
4934                         print "<td></td>\n";
4935                 }
4936                 print "<td>" .
4937                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4938                                -class => "list name"}, esc_html($tag{'name'})) .
4939                       "</td>\n" .
4940                       "<td>";
4941                 if (defined $comment) {
4942                         print format_subject_html($comment, $comment_short,
4943                                                   href(action=>"tag", hash=>$tag{'id'}));
4944                 }
4945                 print "</td>\n" .
4946                       "<td class=\"selflink\">";
4947                 if ($tag{'type'} eq "tag") {
4948                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4949                 } else {
4950                         print "&nbsp;";
4951                 }
4952                 print "</td>\n" .
4953                       "<td class=\"link\">" . " | " .
4954                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4955                 if ($tag{'reftype'} eq "commit") {
4956                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4957                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4958                 } elsif ($tag{'reftype'} eq "blob") {
4959                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4960                 }
4961                 print "</td>\n" .
4962                       "</tr>";
4963         }
4964         if (defined $extra) {
4965                 print "<tr>\n" .
4966                       "<td colspan=\"5\">$extra</td>\n" .
4967                       "</tr>\n";
4968         }
4969         print "</table>\n";
4970 }
4971
4972 sub git_heads_body {
4973         # uses global variable $project
4974         my ($headlist, $head, $from, $to, $extra) = @_;
4975         $from = 0 unless defined $from;
4976         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4977
4978         print "<table class=\"heads\">\n";
4979         my $alternate = 1;
4980         for (my $i = $from; $i <= $to; $i++) {
4981                 my $entry = $headlist->[$i];
4982                 my %ref = %$entry;
4983                 my $curr = $ref{'id'} eq $head;
4984                 if ($alternate) {
4985                         print "<tr class=\"dark\">\n";
4986                 } else {
4987                         print "<tr class=\"light\">\n";
4988                 }
4989                 $alternate ^= 1;
4990                 print "<td><i>$ref{'age'}</i></td>\n" .
4991                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4992                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4993                                -class => "list name"},esc_html($ref{'name'})) .
4994                       "</td>\n" .
4995                       "<td class=\"link\">" .
4996                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4997                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4998                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
4999                       "</td>\n" .
5000                       "</tr>";
5001         }
5002         if (defined $extra) {
5003                 print "<tr>\n" .
5004                       "<td colspan=\"3\">$extra</td>\n" .
5005                       "</tr>\n";
5006         }
5007         print "</table>\n";
5008 }
5009
5010 sub git_search_grep_body {
5011         my ($commitlist, $from, $to, $extra) = @_;
5012         $from = 0 unless defined $from;
5013         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5014
5015         print "<table class=\"commit_search\">\n";
5016         my $alternate = 1;
5017         for (my $i = $from; $i <= $to; $i++) {
5018                 my %co = %{$commitlist->[$i]};
5019                 if (!%co) {
5020                         next;
5021                 }
5022                 my $commit = $co{'id'};
5023                 if ($alternate) {
5024                         print "<tr class=\"dark\">\n";
5025                 } else {
5026                         print "<tr class=\"light\">\n";
5027                 }
5028                 $alternate ^= 1;
5029                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5030                       format_author_html('td', \%co, 15, 5) .
5031                       "<td>" .
5032                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5033                                -class => "list subject"},
5034                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5035                 my $comment = $co{'comment'};
5036                 foreach my $line (@$comment) {
5037                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5038                                 my ($lead, $match, $trail) = ($1, $2, $3);
5039                                 $match = chop_str($match, 70, 5, 'center');
5040                                 my $contextlen = int((80 - length($match))/2);
5041                                 $contextlen = 30 if ($contextlen > 30);
5042                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5043                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5044
5045                                 $lead  = esc_html($lead);
5046                                 $match = esc_html($match);
5047                                 $trail = esc_html($trail);
5048
5049                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5050                         }
5051                 }
5052                 print "</td>\n" .
5053                       "<td class=\"link\">" .
5054                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5055                       " | " .
5056                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5057                       " | " .
5058                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5059                 print "</td>\n" .
5060                       "</tr>\n";
5061         }
5062         if (defined $extra) {
5063                 print "<tr>\n" .
5064                       "<td colspan=\"3\">$extra</td>\n" .
5065                       "</tr>\n";
5066         }
5067         print "</table>\n";
5068 }
5069
5070 ## ======================================================================
5071 ## ======================================================================
5072 ## actions
5073
5074 sub git_project_list {
5075         my $order = $input_params{'order'};
5076         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5077                 die_error(400, "Unknown order parameter");
5078         }
5079
5080         my @list = git_get_projects_list();
5081         if (!@list) {
5082                 die_error(404, "No projects found");
5083         }
5084
5085         git_header_html();
5086         if (defined $home_text && -f $home_text) {
5087                 print "<div class=\"index_include\">\n";
5088                 insert_file($home_text);
5089                 print "</div>\n";
5090         }
5091         print $cgi->startform(-method => "get") .
5092               "<p class=\"projsearch\">Search:\n" .
5093               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5094               "</p>" .
5095               $cgi->end_form() . "\n";
5096         git_project_list_body(\@list, $order);
5097         git_footer_html();
5098 }
5099
5100 sub git_forks {
5101         my $order = $input_params{'order'};
5102         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5103                 die_error(400, "Unknown order parameter");
5104         }
5105
5106         my @list = git_get_projects_list($project);
5107         if (!@list) {
5108                 die_error(404, "No forks found");
5109         }
5110
5111         git_header_html();
5112         git_print_page_nav('','');
5113         git_print_header_div('summary', "$project forks");
5114         git_project_list_body(\@list, $order);
5115         git_footer_html();
5116 }
5117
5118 sub git_project_index {
5119         my @projects = git_get_projects_list($project);
5120
5121         print $cgi->header(
5122                 -type => 'text/plain',
5123                 -charset => 'utf-8',
5124                 -content_disposition => 'inline; filename="index.aux"');
5125
5126         foreach my $pr (@projects) {
5127                 if (!exists $pr->{'owner'}) {
5128                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5129                 }
5130
5131                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5132                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5133                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5134                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5135                 $path  =~ s/ /\+/g;
5136                 $owner =~ s/ /\+/g;
5137
5138                 print "$path $owner\n";
5139         }
5140 }
5141
5142 sub git_summary {
5143         my $descr = git_get_project_description($project) || "none";
5144         my %co = parse_commit("HEAD");
5145         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5146         my $head = $co{'id'};
5147         my $remote_heads = gitweb_check_feature('remote_heads');
5148
5149         my $owner = git_get_project_owner($project);
5150
5151         my $refs = git_get_references();
5152         # These get_*_list functions return one more to allow us to see if
5153         # there are more ...
5154         my @taglist  = git_get_tags_list(16);
5155         my @headlist = git_get_heads_list(16);
5156         my @remotelist = $remote_heads ? git_get_heads_list(16, 'remotes') : ();
5157         my @forklist;
5158         my $check_forks = gitweb_check_feature('forks');
5159
5160         if ($check_forks) {
5161                 @forklist = git_get_projects_list($project);
5162         }
5163
5164         git_header_html();
5165         git_print_page_nav('summary','', $head);
5166
5167         print "<div class=\"title\">&nbsp;</div>\n";
5168         print "<table class=\"projects_list\">\n" .
5169               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5170               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5171         if (defined $cd{'rfc2822'}) {
5172                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5173         }
5174
5175         # use per project git URL list in $projectroot/$project/cloneurl
5176         # or make project git URL from git base URL and project name
5177         my $url_tag = "URL";
5178         my @url_list = git_get_project_url_list($project);
5179         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5180         foreach my $git_url (@url_list) {
5181                 next unless $git_url;
5182                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5183                 $url_tag = "";
5184         }
5185
5186         # Tag cloud
5187         my $show_ctags = gitweb_check_feature('ctags');
5188         if ($show_ctags) {
5189                 my $ctags = git_get_project_ctags($project);
5190                 my $cloud = git_populate_project_tagcloud($ctags);
5191                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5192                 print "</td>\n<td>" unless %$ctags;
5193                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5194                 print "</td>\n<td>" if %$ctags;
5195                 print git_show_project_tagcloud($cloud, 48);
5196                 print "</td></tr>";
5197         }
5198
5199         print "</table>\n";
5200
5201         # If XSS prevention is on, we don't include README.html.
5202         # TODO: Allow a readme in some safe format.
5203         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5204                 print "<div class=\"title\">readme</div>\n" .
5205                       "<div class=\"readme\">\n";
5206                 insert_file("$projectroot/$project/README.html");
5207                 print "\n</div>\n"; # class="readme"
5208         }
5209
5210         # we need to request one more than 16 (0..15) to check if
5211         # those 16 are all
5212         my @commitlist = $head ? parse_commits($head, 17) : ();
5213         if (@commitlist) {
5214                 git_print_header_div('shortlog');
5215                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5216                                   $#commitlist <=  15 ? undef :
5217                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5218         }
5219
5220         if (@taglist) {
5221                 git_print_header_div('tags');
5222                 git_tags_body(\@taglist, 0, 15,
5223                               $#taglist <=  15 ? undef :
5224                               $cgi->a({-href => href(action=>"tags")}, "..."));
5225         }
5226
5227         if (@headlist) {
5228                 git_print_header_div('heads');
5229                 git_heads_body(\@headlist, $head, 0, 15,
5230                                $#headlist <= 15 ? undef :
5231                                $cgi->a({-href => href(action=>"heads")}, "..."));
5232         }
5233
5234         if (@remotelist) {
5235                 git_print_header_div('remotes');
5236                 git_heads_body(\@remotelist, $head, 0, 15,
5237                                $#remotelist <= 15 ? undef :
5238                                $cgi->a({-href => href(action=>"remotes")}, "..."));
5239         }
5240
5241         if (@forklist) {
5242                 git_print_header_div('forks');
5243                 git_project_list_body(\@forklist, 'age', 0, 15,
5244                                       $#forklist <= 15 ? undef :
5245                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5246                                       'no_header');
5247         }
5248
5249         git_footer_html();
5250 }
5251
5252 sub git_tag {
5253         my %tag = parse_tag($hash);
5254
5255         if (! %tag) {
5256                 die_error(404, "Unknown tag object");
5257         }
5258
5259         my $head = git_get_head_hash($project);
5260         git_header_html();
5261         git_print_page_nav('','', $head,undef,$head);
5262         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5263         print "<div class=\"title_text\">\n" .
5264               "<table class=\"object_header\">\n" .
5265               "<tr>\n" .
5266               "<td>object</td>\n" .
5267               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5268                                $tag{'object'}) . "</td>\n" .
5269               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5270                                               $tag{'type'}) . "</td>\n" .
5271               "</tr>\n";
5272         if (defined($tag{'author'})) {
5273                 git_print_authorship_rows(\%tag, 'author');
5274         }
5275         print "</table>\n\n" .
5276               "</div>\n";
5277         print "<div class=\"page_body\">";
5278         my $comment = $tag{'comment'};
5279         foreach my $line (@$comment) {
5280                 chomp $line;
5281                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5282         }
5283         print "</div>\n";
5284         git_footer_html();
5285 }
5286
5287 sub git_blame_common {
5288         my $format = shift || 'porcelain';
5289         if ($format eq 'porcelain' && $cgi->param('js')) {
5290                 $format = 'incremental';
5291                 $action = 'blame_incremental'; # for page title etc
5292         }
5293
5294         # permissions
5295         gitweb_check_feature('blame')
5296                 or die_error(403, "Blame view not allowed");
5297
5298         # error checking
5299         die_error(400, "No file name given") unless $file_name;
5300         $hash_base ||= git_get_head_hash($project);
5301         die_error(404, "Couldn't find base commit") unless $hash_base;
5302         my %co = parse_commit($hash_base)
5303                 or die_error(404, "Commit not found");
5304         my $ftype = "blob";
5305         if (!defined $hash) {
5306                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5307                         or die_error(404, "Error looking up file");
5308         } else {
5309                 $ftype = git_get_type($hash);
5310                 if ($ftype !~ "blob") {
5311                         die_error(400, "Object is not a blob");
5312                 }
5313         }
5314
5315         my $fd;
5316         if ($format eq 'incremental') {
5317                 # get file contents (as base)
5318                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5319                         or die_error(500, "Open git-cat-file failed");
5320         } elsif ($format eq 'data') {
5321                 # run git-blame --incremental
5322                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5323                         $hash_base, "--", $file_name
5324                         or die_error(500, "Open git-blame --incremental failed");
5325         } else {
5326                 # run git-blame --porcelain
5327                 open $fd, "-|", git_cmd(), "blame", '-p',
5328                         $hash_base, '--', $file_name
5329                         or die_error(500, "Open git-blame --porcelain failed");
5330         }
5331
5332         # incremental blame data returns early
5333         if ($format eq 'data') {
5334                 print $cgi->header(
5335                         -type=>"text/plain", -charset => "utf-8",
5336                         -status=> "200 OK");
5337                 local $| = 1; # output autoflush
5338                 print while <$fd>;
5339                 close $fd
5340                         or print "ERROR $!\n";
5341
5342                 print 'END';
5343                 if (defined $t0 && gitweb_check_feature('timed')) {
5344                         print ' '.
5345                               tv_interval($t0, [ gettimeofday() ]).
5346                               ' '.$number_of_git_cmds;
5347                 }
5348                 print "\n";
5349
5350                 return;
5351         }
5352
5353         # page header
5354         git_header_html();
5355         my $formats_nav =
5356                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5357                         "blob") .
5358                 " | ";
5359         if ($format eq 'incremental') {
5360                 $formats_nav .=
5361                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5362                                 "blame") . " (non-incremental)";
5363         } else {
5364                 $formats_nav .=
5365                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5366                                 "blame") . " (incremental)";
5367         }
5368         $formats_nav .=
5369                 " | " .
5370                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5371                         "history") .
5372                 " | " .
5373                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5374                         "HEAD");
5375         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5376         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5377         git_print_page_path($file_name, $ftype, $hash_base);
5378
5379         # page body
5380         if ($format eq 'incremental') {
5381                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5382                       "This page requires JavaScript to run.\n Use ".
5383                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5384                               'this page').
5385                       " instead.\n".
5386                       "</b></center></div>\n</noscript>\n";
5387
5388                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5389         }
5390
5391         print qq!<div class="page_body">\n!;
5392         print qq!<div id="progress_info">... / ...</div>\n!
5393                 if ($format eq 'incremental');
5394         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5395               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5396               qq!<thead>\n!.
5397               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5398               qq!</thead>\n!.
5399               qq!<tbody>\n!;
5400
5401         my @rev_color = qw(light dark);
5402         my $num_colors = scalar(@rev_color);
5403         my $current_color = 0;
5404
5405         if ($format eq 'incremental') {
5406                 my $color_class = $rev_color[$current_color];
5407
5408                 #contents of a file
5409                 my $linenr = 0;
5410         LINE:
5411                 while (my $line = <$fd>) {
5412                         chomp $line;
5413                         $linenr++;
5414
5415                         print qq!<tr id="l$linenr" class="$color_class">!.
5416                               qq!<td class="sha1"><a href=""> </a></td>!.
5417                               qq!<td class="linenr">!.
5418                               qq!<a class="linenr" href="">$linenr</a></td>!;
5419                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5420                         print qq!</tr>\n!;
5421                 }
5422
5423         } else { # porcelain, i.e. ordinary blame
5424                 my %metainfo = (); # saves information about commits
5425
5426                 # blame data
5427         LINE:
5428                 while (my $line = <$fd>) {
5429                         chomp $line;
5430                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5431                         # no <lines in group> for subsequent lines in group of lines
5432                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5433                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5434                         if (!exists $metainfo{$full_rev}) {
5435                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5436                         }
5437                         my $meta = $metainfo{$full_rev};
5438                         my $data;
5439                         while ($data = <$fd>) {
5440                                 chomp $data;
5441                                 last if ($data =~ s/^\t//); # contents of line
5442                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5443                                         $meta->{$1} = $2 unless exists $meta->{$1};
5444                                 }
5445                                 if ($data =~ /^previous /) {
5446                                         $meta->{'nprevious'}++;
5447                                 }
5448                         }
5449                         my $short_rev = substr($full_rev, 0, 8);
5450                         my $author = $meta->{'author'};
5451                         my %date =
5452                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5453                         my $date = $date{'iso-tz'};
5454                         if ($group_size) {
5455                                 $current_color = ($current_color + 1) % $num_colors;
5456                         }
5457                         my $tr_class = $rev_color[$current_color];
5458                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5459                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5460                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5461                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5462                         if ($group_size) {
5463                                 print "<td class=\"sha1\"";
5464                                 print " title=\"". esc_html($author) . ", $date\"";
5465                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5466                                 print ">";
5467                                 print $cgi->a({-href => href(action=>"commit",
5468                                                              hash=>$full_rev,
5469                                                              file_name=>$file_name)},
5470                                               esc_html($short_rev));
5471                                 if ($group_size >= 2) {
5472                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5473                                         if (@author_initials) {
5474                                                 print "<br />" .
5475                                                       esc_html(join('', @author_initials));
5476                                                 #           or join('.', ...)
5477                                         }
5478                                 }
5479                                 print "</td>\n";
5480                         }
5481                         # 'previous' <sha1 of parent commit> <filename at commit>
5482                         if (exists $meta->{'previous'} &&
5483                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5484                                 $meta->{'parent'} = $1;
5485                                 $meta->{'file_parent'} = unquote($2);
5486                         }
5487                         my $linenr_commit =
5488                                 exists($meta->{'parent'}) ?
5489                                 $meta->{'parent'} : $full_rev;
5490                         my $linenr_filename =
5491                                 exists($meta->{'file_parent'}) ?
5492                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5493                         my $blamed = href(action => 'blame',
5494                                           file_name => $linenr_filename,
5495                                           hash_base => $linenr_commit);
5496                         print "<td class=\"linenr\">";
5497                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5498                                         -class => "linenr" },
5499                                       esc_html($lineno));
5500                         print "</td>";
5501                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5502                         print "</tr>\n";
5503                 } # end while
5504
5505         }
5506
5507         # footer
5508         print "</tbody>\n".
5509               "</table>\n"; # class="blame"
5510         print "</div>\n";   # class="blame_body"
5511         close $fd
5512                 or print "Reading blob failed\n";
5513
5514         git_footer_html();
5515 }
5516
5517 sub git_blame {
5518         git_blame_common();
5519 }
5520
5521 sub git_blame_incremental {
5522         git_blame_common('incremental');
5523 }
5524
5525 sub git_blame_data {
5526         git_blame_common('data');
5527 }
5528
5529 sub git_tags {
5530         my $head = git_get_head_hash($project);
5531         git_header_html();
5532         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5533         git_print_header_div('summary', $project);
5534
5535         my @tagslist = git_get_tags_list();
5536         if (@tagslist) {
5537                 git_tags_body(\@tagslist);
5538         }
5539         git_footer_html();
5540 }
5541
5542 sub git_heads {
5543         my $head = git_get_head_hash($project);
5544         git_header_html();
5545         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5546         git_print_header_div('summary', $project);
5547
5548         my @headslist = git_get_heads_list();
5549         if (@headslist) {
5550                 git_heads_body(\@headslist, $head);
5551         }
5552         git_footer_html();
5553 }
5554
5555 sub git_remotes {
5556         gitweb_check_feature('remote_heads')
5557                 or die_error(403, "Remote heads view is disabled");
5558
5559         my $head = git_get_head_hash($project);
5560         git_header_html();
5561         git_print_page_nav('','', $head,undef,$head,format_ref_views('remotes'));
5562         git_print_header_div('summary', $project);
5563
5564         my @remotelist = git_get_heads_list(undef, 'remotes');
5565         if (@remotelist) {
5566                 git_heads_body(\@remotelist, $head);
5567         }
5568         git_footer_html();
5569 }
5570
5571 sub git_blob_plain {
5572         my $type = shift;
5573         my $expires;
5574
5575         if (!defined $hash) {
5576                 if (defined $file_name) {
5577                         my $base = $hash_base || git_get_head_hash($project);
5578                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5579                                 or die_error(404, "Cannot find file");
5580                 } else {
5581                         die_error(400, "No file name defined");
5582                 }
5583         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5584                 # blobs defined by non-textual hash id's can be cached
5585                 $expires = "+1d";
5586         }
5587
5588         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5589                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5590
5591         # content-type (can include charset)
5592         $type = blob_contenttype($fd, $file_name, $type);
5593
5594         # "save as" filename, even when no $file_name is given
5595         my $save_as = "$hash";
5596         if (defined $file_name) {
5597                 $save_as = $file_name;
5598         } elsif ($type =~ m/^text\//) {
5599                 $save_as .= '.txt';
5600         }
5601
5602         # With XSS prevention on, blobs of all types except a few known safe
5603         # ones are served with "Content-Disposition: attachment" to make sure
5604         # they don't run in our security domain.  For certain image types,
5605         # blob view writes an <img> tag referring to blob_plain view, and we
5606         # want to be sure not to break that by serving the image as an
5607         # attachment (though Firefox 3 doesn't seem to care).
5608         my $sandbox = $prevent_xss &&
5609                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5610
5611         print $cgi->header(
5612                 -type => $type,
5613                 -expires => $expires,
5614                 -content_disposition =>
5615                         ($sandbox ? 'attachment' : 'inline')
5616                         . '; filename="' . $save_as . '"');
5617         local $/ = undef;
5618         binmode STDOUT, ':raw';
5619         print <$fd>;
5620         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5621         close $fd;
5622 }
5623
5624 sub git_blob {
5625         my $expires;
5626
5627         if (!defined $hash) {
5628                 if (defined $file_name) {
5629                         my $base = $hash_base || git_get_head_hash($project);
5630                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5631                                 or die_error(404, "Cannot find file");
5632                 } else {
5633                         die_error(400, "No file name defined");
5634                 }
5635         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5636                 # blobs defined by non-textual hash id's can be cached
5637                 $expires = "+1d";
5638         }
5639
5640         my $have_blame = gitweb_check_feature('blame');
5641         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5642                 or die_error(500, "Couldn't cat $file_name, $hash");
5643         my $mimetype = blob_mimetype($fd, $file_name);
5644         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5645         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5646                 close $fd;
5647                 return git_blob_plain($mimetype);
5648         }
5649         # we can have blame only for text/* mimetype
5650         $have_blame &&= ($mimetype =~ m!^text/!);
5651
5652         my $highlight = gitweb_check_feature('highlight');
5653         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5654         $fd = run_highlighter($fd, $highlight, $syntax)
5655                 if $syntax;
5656
5657         git_header_html(undef, $expires);
5658         my $formats_nav = '';
5659         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5660                 if (defined $file_name) {
5661                         if ($have_blame) {
5662                                 $formats_nav .=
5663                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5664                                                 "blame") .
5665                                         " | ";
5666                         }
5667                         $formats_nav .=
5668                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5669                                         "history") .
5670                                 " | " .
5671                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5672                                         "raw") .
5673                                 " | " .
5674                                 $cgi->a({-href => href(action=>"blob",
5675                                                        hash_base=>"HEAD", file_name=>$file_name)},
5676                                         "HEAD");
5677                 } else {
5678                         $formats_nav .=
5679                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5680                                         "raw");
5681                 }
5682                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5683                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5684         } else {
5685                 print "<div class=\"page_nav\">\n" .
5686                       "<br/><br/></div>\n" .
5687                       "<div class=\"title\">$hash</div>\n";
5688         }
5689         git_print_page_path($file_name, "blob", $hash_base);
5690         print "<div class=\"page_body\">\n";
5691         if ($mimetype =~ m!^image/!) {
5692                 print qq!<img type="$mimetype"!;
5693                 if ($file_name) {
5694                         print qq! alt="$file_name" title="$file_name"!;
5695                 }
5696                 print qq! src="! .
5697                       href(action=>"blob_plain", hash=>$hash,
5698                            hash_base=>$hash_base, file_name=>$file_name) .
5699                       qq!" />\n!;
5700         } else {
5701                 my $nr;
5702                 while (my $line = <$fd>) {
5703                         chomp $line;
5704                         $nr++;
5705                         $line = untabify($line);
5706                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5707                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5708                 }
5709         }
5710         close $fd
5711                 or print "Reading blob failed.\n";
5712         print "</div>";
5713         git_footer_html();
5714 }
5715
5716 sub git_tree {
5717         if (!defined $hash_base) {
5718                 $hash_base = "HEAD";
5719         }
5720         if (!defined $hash) {
5721                 if (defined $file_name) {
5722                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5723                 } else {
5724                         $hash = $hash_base;
5725                 }
5726         }
5727         die_error(404, "No such tree") unless defined($hash);
5728
5729         my $show_sizes = gitweb_check_feature('show-sizes');
5730         my $have_blame = gitweb_check_feature('blame');
5731
5732         my @entries = ();
5733         {
5734                 local $/ = "\0";
5735                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5736                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5737                         or die_error(500, "Open git-ls-tree failed");
5738                 @entries = map { chomp; $_ } <$fd>;
5739                 close $fd
5740                         or die_error(404, "Reading tree failed");
5741         }
5742
5743         my $refs = git_get_references();
5744         my $ref = format_ref_marker($refs, $hash_base);
5745         git_header_html();
5746         my $basedir = '';
5747         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5748                 my @views_nav = ();
5749                 if (defined $file_name) {
5750                         push @views_nav,
5751                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5752                                         "history"),
5753                                 $cgi->a({-href => href(action=>"tree",
5754                                                        hash_base=>"HEAD", file_name=>$file_name)},
5755                                         "HEAD"),
5756                 }
5757                 my $snapshot_links = format_snapshot_links($hash);
5758                 if (defined $snapshot_links) {
5759                         # FIXME: Should be available when we have no hash base as well.
5760                         push @views_nav, $snapshot_links;
5761                 }
5762                 git_print_page_nav('tree','', $hash_base, undef, undef,
5763                                    join(' | ', @views_nav));
5764                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5765         } else {
5766                 undef $hash_base;
5767                 print "<div class=\"page_nav\">\n";
5768                 print "<br/><br/></div>\n";
5769                 print "<div class=\"title\">$hash</div>\n";
5770         }
5771         if (defined $file_name) {
5772                 $basedir = $file_name;
5773                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5774                         $basedir .= '/';
5775                 }
5776                 git_print_page_path($file_name, 'tree', $hash_base);
5777         }
5778         print "<div class=\"page_body\">\n";
5779         print "<table class=\"tree\">\n";
5780         my $alternate = 1;
5781         # '..' (top directory) link if possible
5782         if (defined $hash_base &&
5783             defined $file_name && $file_name =~ m![^/]+$!) {
5784                 if ($alternate) {
5785                         print "<tr class=\"dark\">\n";
5786                 } else {
5787                         print "<tr class=\"light\">\n";
5788                 }
5789                 $alternate ^= 1;
5790
5791                 my $up = $file_name;
5792                 $up =~ s!/?[^/]+$!!;
5793                 undef $up unless $up;
5794                 # based on git_print_tree_entry
5795                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5796                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5797                 print '<td class="list">';
5798                 print $cgi->a({-href => href(action=>"tree",
5799                                              hash_base=>$hash_base,
5800                                              file_name=>$up)},
5801                               "..");
5802                 print "</td>\n";
5803                 print "<td class=\"link\"></td>\n";
5804
5805                 print "</tr>\n";
5806         }
5807         foreach my $line (@entries) {
5808                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5809
5810                 if ($alternate) {
5811                         print "<tr class=\"dark\">\n";
5812                 } else {
5813                         print "<tr class=\"light\">\n";
5814                 }
5815                 $alternate ^= 1;
5816
5817                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5818
5819                 print "</tr>\n";
5820         }
5821         print "</table>\n" .
5822               "</div>";
5823         git_footer_html();
5824 }
5825
5826 sub snapshot_name {
5827         my ($project, $hash) = @_;
5828
5829         # path/to/project.git  -> project
5830         # path/to/project/.git -> project
5831         my $name = to_utf8($project);
5832         $name =~ s,([^/])/*\.git$,$1,;
5833         $name = basename($name);
5834         # sanitize name
5835         $name =~ s/[[:cntrl:]]/?/g;
5836
5837         my $ver = $hash;
5838         if ($hash =~ /^[0-9a-fA-F]+$/) {
5839                 # shorten SHA-1 hash
5840                 my $full_hash = git_get_full_hash($project, $hash);
5841                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5842                         $ver = git_get_short_hash($project, $hash);
5843                 }
5844         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5845                 # tags don't need shortened SHA-1 hash
5846                 $ver = $1;
5847         } else {
5848                 # branches and other need shortened SHA-1 hash
5849                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5850                         $ver = $1;
5851                 }
5852                 $ver .= '-' . git_get_short_hash($project, $hash);
5853         }
5854         # in case of hierarchical branch names
5855         $ver =~ s!/!.!g;
5856
5857         # name = project-version_string
5858         $name = "$name-$ver";
5859
5860         return wantarray ? ($name, $name) : $name;
5861 }
5862
5863 sub git_snapshot {
5864         my $format = $input_params{'snapshot_format'};
5865         if (!@snapshot_fmts) {
5866                 die_error(403, "Snapshots not allowed");
5867         }
5868         # default to first supported snapshot format
5869         $format ||= $snapshot_fmts[0];
5870         if ($format !~ m/^[a-z0-9]+$/) {
5871                 die_error(400, "Invalid snapshot format parameter");
5872         } elsif (!exists($known_snapshot_formats{$format})) {
5873                 die_error(400, "Unknown snapshot format");
5874         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5875                 die_error(403, "Snapshot format not allowed");
5876         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5877                 die_error(403, "Unsupported snapshot format");
5878         }
5879
5880         my $type = git_get_type("$hash^{}");
5881         if (!$type) {
5882                 die_error(404, 'Object does not exist');
5883         }  elsif ($type eq 'blob') {
5884                 die_error(400, 'Object is not a tree-ish');
5885         }
5886
5887         my ($name, $prefix) = snapshot_name($project, $hash);
5888         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5889         my $cmd = quote_command(
5890                 git_cmd(), 'archive',
5891                 "--format=$known_snapshot_formats{$format}{'format'}",
5892                 "--prefix=$prefix/", $hash);
5893         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5894                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5895         }
5896
5897         $filename =~ s/(["\\])/\\$1/g;
5898         print $cgi->header(
5899                 -type => $known_snapshot_formats{$format}{'type'},
5900                 -content_disposition => 'inline; filename="' . $filename . '"',
5901                 -status => '200 OK');
5902
5903         open my $fd, "-|", $cmd
5904                 or die_error(500, "Execute git-archive failed");
5905         binmode STDOUT, ':raw';
5906         print <$fd>;
5907         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5908         close $fd;
5909 }
5910
5911 sub git_log_generic {
5912         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5913
5914         my $head = git_get_head_hash($project);
5915         if (!defined $base) {
5916                 $base = $head;
5917         }
5918         if (!defined $page) {
5919                 $page = 0;
5920         }
5921         my $refs = git_get_references();
5922
5923         my $commit_hash = $base;
5924         if (defined $parent) {
5925                 $commit_hash = "$parent..$base";
5926         }
5927         my @commitlist =
5928                 parse_commits($commit_hash, 101, (100 * $page),
5929                               defined $file_name ? ($file_name, "--full-history") : ());
5930
5931         my $ftype;
5932         if (!defined $file_hash && defined $file_name) {
5933                 # some commits could have deleted file in question,
5934                 # and not have it in tree, but one of them has to have it
5935                 for (my $i = 0; $i < @commitlist; $i++) {
5936                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5937                         last if defined $file_hash;
5938                 }
5939         }
5940         if (defined $file_hash) {
5941                 $ftype = git_get_type($file_hash);
5942         }
5943         if (defined $file_name && !defined $ftype) {
5944                 die_error(500, "Unknown type of object");
5945         }
5946         my %co;
5947         if (defined $file_name) {
5948                 %co = parse_commit($base)
5949                         or die_error(404, "Unknown commit object");
5950         }
5951
5952
5953         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5954         my $next_link = '';
5955         if ($#commitlist >= 100) {
5956                 $next_link =
5957                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5958                                  -accesskey => "n", -title => "Alt-n"}, "next");
5959         }
5960         my $patch_max = gitweb_get_feature('patches');
5961         if ($patch_max && !defined $file_name) {
5962                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5963                         $paging_nav .= " &sdot; " .
5964                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5965                                         "patches");
5966                 }
5967         }
5968
5969         git_header_html();
5970         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5971         if (defined $file_name) {
5972                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5973         } else {
5974                 git_print_header_div('summary', $project)
5975         }
5976         git_print_page_path($file_name, $ftype, $hash_base)
5977                 if (defined $file_name);
5978
5979         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5980                      $file_name, $file_hash, $ftype);
5981
5982         git_footer_html();
5983 }
5984
5985 sub git_log {
5986         git_log_generic('log', \&git_log_body,
5987                         $hash, $hash_parent);
5988 }
5989
5990 sub git_commit {
5991         $hash ||= $hash_base || "HEAD";
5992         my %co = parse_commit($hash)
5993             or die_error(404, "Unknown commit object");
5994
5995         my $parent  = $co{'parent'};
5996         my $parents = $co{'parents'}; # listref
5997
5998         # we need to prepare $formats_nav before any parameter munging
5999         my $formats_nav;
6000         if (!defined $parent) {
6001                 # --root commitdiff
6002                 $formats_nav .= '(initial)';
6003         } elsif (@$parents == 1) {
6004                 # single parent commit
6005                 $formats_nav .=
6006                         '(parent: ' .
6007                         $cgi->a({-href => href(action=>"commit",
6008                                                hash=>$parent)},
6009                                 esc_html(substr($parent, 0, 7))) .
6010                         ')';
6011         } else {
6012                 # merge commit
6013                 $formats_nav .=
6014                         '(merge: ' .
6015                         join(' ', map {
6016                                 $cgi->a({-href => href(action=>"commit",
6017                                                        hash=>$_)},
6018                                         esc_html(substr($_, 0, 7)));
6019                         } @$parents ) .
6020                         ')';
6021         }
6022         if (gitweb_check_feature('patches') && @$parents <= 1) {
6023                 $formats_nav .= " | " .
6024                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6025                                 "patch");
6026         }
6027
6028         if (!defined $parent) {
6029                 $parent = "--root";
6030         }
6031         my @difftree;
6032         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6033                 @diff_opts,
6034                 (@$parents <= 1 ? $parent : '-c'),
6035                 $hash, "--"
6036                 or die_error(500, "Open git-diff-tree failed");
6037         @difftree = map { chomp; $_ } <$fd>;
6038         close $fd or die_error(404, "Reading git-diff-tree failed");
6039
6040         # non-textual hash id's can be cached
6041         my $expires;
6042         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6043                 $expires = "+1d";
6044         }
6045         my $refs = git_get_references();
6046         my $ref = format_ref_marker($refs, $co{'id'});
6047
6048         git_header_html(undef, $expires);
6049         git_print_page_nav('commit', '',
6050                            $hash, $co{'tree'}, $hash,
6051                            $formats_nav);
6052
6053         if (defined $co{'parent'}) {
6054                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6055         } else {
6056                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6057         }
6058         print "<div class=\"title_text\">\n" .
6059               "<table class=\"object_header\">\n";
6060         git_print_authorship_rows(\%co);
6061         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6062         print "<tr>" .
6063               "<td>tree</td>" .
6064               "<td class=\"sha1\">" .
6065               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6066                        class => "list"}, $co{'tree'}) .
6067               "</td>" .
6068               "<td class=\"link\">" .
6069               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6070                       "tree");
6071         my $snapshot_links = format_snapshot_links($hash);
6072         if (defined $snapshot_links) {
6073                 print " | " . $snapshot_links;
6074         }
6075         print "</td>" .
6076               "</tr>\n";
6077
6078         foreach my $par (@$parents) {
6079                 print "<tr>" .
6080                       "<td>parent</td>" .
6081                       "<td class=\"sha1\">" .
6082                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6083                                class => "list"}, $par) .
6084                       "</td>" .
6085                       "<td class=\"link\">" .
6086                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6087                       " | " .
6088                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6089                       "</td>" .
6090                       "</tr>\n";
6091         }
6092         print "</table>".
6093               "</div>\n";
6094
6095         print "<div class=\"page_body\">\n";
6096         git_print_log($co{'comment'});
6097         print "</div>\n";
6098
6099         git_difftree_body(\@difftree, $hash, @$parents);
6100
6101         git_footer_html();
6102 }
6103
6104 sub git_object {
6105         # object is defined by:
6106         # - hash or hash_base alone
6107         # - hash_base and file_name
6108         my $type;
6109
6110         # - hash or hash_base alone
6111         if ($hash || ($hash_base && !defined $file_name)) {
6112                 my $object_id = $hash || $hash_base;
6113
6114                 open my $fd, "-|", quote_command(
6115                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6116                         or die_error(404, "Object does not exist");
6117                 $type = <$fd>;
6118                 chomp $type;
6119                 close $fd
6120                         or die_error(404, "Object does not exist");
6121
6122         # - hash_base and file_name
6123         } elsif ($hash_base && defined $file_name) {
6124                 $file_name =~ s,/+$,,;
6125
6126                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6127                         or die_error(404, "Base object does not exist");
6128
6129                 # here errors should not hapen
6130                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6131                         or die_error(500, "Open git-ls-tree failed");
6132                 my $line = <$fd>;
6133                 close $fd;
6134
6135                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6136                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6137                         die_error(404, "File or directory for given base does not exist");
6138                 }
6139                 $type = $2;
6140                 $hash = $3;
6141         } else {
6142                 die_error(400, "Not enough information to find object");
6143         }
6144
6145         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6146                                           hash=>$hash, hash_base=>$hash_base,
6147                                           file_name=>$file_name),
6148                              -status => '302 Found');
6149 }
6150
6151 sub git_blobdiff {
6152         my $format = shift || 'html';
6153
6154         my $fd;
6155         my @difftree;
6156         my %diffinfo;
6157         my $expires;
6158
6159         # preparing $fd and %diffinfo for git_patchset_body
6160         # new style URI
6161         if (defined $hash_base && defined $hash_parent_base) {
6162                 if (defined $file_name) {
6163                         # read raw output
6164                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6165                                 $hash_parent_base, $hash_base,
6166                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6167                                 or die_error(500, "Open git-diff-tree failed");
6168                         @difftree = map { chomp; $_ } <$fd>;
6169                         close $fd
6170                                 or die_error(404, "Reading git-diff-tree failed");
6171                         @difftree
6172                                 or die_error(404, "Blob diff not found");
6173
6174                 } elsif (defined $hash &&
6175                          $hash =~ /[0-9a-fA-F]{40}/) {
6176                         # try to find filename from $hash
6177
6178                         # read filtered raw output
6179                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6180                                 $hash_parent_base, $hash_base, "--"
6181                                 or die_error(500, "Open git-diff-tree failed");
6182                         @difftree =
6183                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6184                                 # $hash == to_id
6185                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6186                                 map { chomp; $_ } <$fd>;
6187                         close $fd
6188                                 or die_error(404, "Reading git-diff-tree failed");
6189                         @difftree
6190                                 or die_error(404, "Blob diff not found");
6191
6192                 } else {
6193                         die_error(400, "Missing one of the blob diff parameters");
6194                 }
6195
6196                 if (@difftree > 1) {
6197                         die_error(400, "Ambiguous blob diff specification");
6198                 }
6199
6200                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6201                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6202                 $file_name   ||= $diffinfo{'to_file'};
6203
6204                 $hash_parent ||= $diffinfo{'from_id'};
6205                 $hash        ||= $diffinfo{'to_id'};
6206
6207                 # non-textual hash id's can be cached
6208                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6209                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6210                         $expires = '+1d';
6211                 }
6212
6213                 # open patch output
6214                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6215                         '-p', ($format eq 'html' ? "--full-index" : ()),
6216                         $hash_parent_base, $hash_base,
6217                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6218                         or die_error(500, "Open git-diff-tree failed");
6219         }
6220
6221         # old/legacy style URI -- not generated anymore since 1.4.3.
6222         if (!%diffinfo) {
6223                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6224         }
6225
6226         # header
6227         if ($format eq 'html') {
6228                 my $formats_nav =
6229                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6230                                 "raw");
6231                 git_header_html(undef, $expires);
6232                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6233                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6234                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6235                 } else {
6236                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6237                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6238                 }
6239                 if (defined $file_name) {
6240                         git_print_page_path($file_name, "blob", $hash_base);
6241                 } else {
6242                         print "<div class=\"page_path\"></div>\n";
6243                 }
6244
6245         } elsif ($format eq 'plain') {
6246                 print $cgi->header(
6247                         -type => 'text/plain',
6248                         -charset => 'utf-8',
6249                         -expires => $expires,
6250                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6251
6252                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6253
6254         } else {
6255                 die_error(400, "Unknown blobdiff format");
6256         }
6257
6258         # patch
6259         if ($format eq 'html') {
6260                 print "<div class=\"page_body\">\n";
6261
6262                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6263                 close $fd;
6264
6265                 print "</div>\n"; # class="page_body"
6266                 git_footer_html();
6267
6268         } else {
6269                 while (my $line = <$fd>) {
6270                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6271                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6272
6273                         print $line;
6274
6275                         last if $line =~ m!^\+\+\+!;
6276                 }
6277                 local $/ = undef;
6278                 print <$fd>;
6279                 close $fd;
6280         }
6281 }
6282
6283 sub git_blobdiff_plain {
6284         git_blobdiff('plain');
6285 }
6286
6287 sub git_commitdiff {
6288         my %params = @_;
6289         my $format = $params{-format} || 'html';
6290
6291         my ($patch_max) = gitweb_get_feature('patches');
6292         if ($format eq 'patch') {
6293                 die_error(403, "Patch view not allowed") unless $patch_max;
6294         }
6295
6296         $hash ||= $hash_base || "HEAD";
6297         my %co = parse_commit($hash)
6298             or die_error(404, "Unknown commit object");
6299
6300         # choose format for commitdiff for merge
6301         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6302                 $hash_parent = '--cc';
6303         }
6304         # we need to prepare $formats_nav before almost any parameter munging
6305         my $formats_nav;
6306         if ($format eq 'html') {
6307                 $formats_nav =
6308                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6309                                 "raw");
6310                 if ($patch_max && @{$co{'parents'}} <= 1) {
6311                         $formats_nav .= " | " .
6312                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6313                                         "patch");
6314                 }
6315
6316                 if (defined $hash_parent &&
6317                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6318                         # commitdiff with two commits given
6319                         my $hash_parent_short = $hash_parent;
6320                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6321                                 $hash_parent_short = substr($hash_parent, 0, 7);
6322                         }
6323                         $formats_nav .=
6324                                 ' (from';
6325                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6326                                 if ($co{'parents'}[$i] eq $hash_parent) {
6327                                         $formats_nav .= ' parent ' . ($i+1);
6328                                         last;
6329                                 }
6330                         }
6331                         $formats_nav .= ': ' .
6332                                 $cgi->a({-href => href(action=>"commitdiff",
6333                                                        hash=>$hash_parent)},
6334                                         esc_html($hash_parent_short)) .
6335                                 ')';
6336                 } elsif (!$co{'parent'}) {
6337                         # --root commitdiff
6338                         $formats_nav .= ' (initial)';
6339                 } elsif (scalar @{$co{'parents'}} == 1) {
6340                         # single parent commit
6341                         $formats_nav .=
6342                                 ' (parent: ' .
6343                                 $cgi->a({-href => href(action=>"commitdiff",
6344                                                        hash=>$co{'parent'})},
6345                                         esc_html(substr($co{'parent'}, 0, 7))) .
6346                                 ')';
6347                 } else {
6348                         # merge commit
6349                         if ($hash_parent eq '--cc') {
6350                                 $formats_nav .= ' | ' .
6351                                         $cgi->a({-href => href(action=>"commitdiff",
6352                                                                hash=>$hash, hash_parent=>'-c')},
6353                                                 'combined');
6354                         } else { # $hash_parent eq '-c'
6355                                 $formats_nav .= ' | ' .
6356                                         $cgi->a({-href => href(action=>"commitdiff",
6357                                                                hash=>$hash, hash_parent=>'--cc')},
6358                                                 'compact');
6359                         }
6360                         $formats_nav .=
6361                                 ' (merge: ' .
6362                                 join(' ', map {
6363                                         $cgi->a({-href => href(action=>"commitdiff",
6364                                                                hash=>$_)},
6365                                                 esc_html(substr($_, 0, 7)));
6366                                 } @{$co{'parents'}} ) .
6367                                 ')';
6368                 }
6369         }
6370
6371         my $hash_parent_param = $hash_parent;
6372         if (!defined $hash_parent_param) {
6373                 # --cc for multiple parents, --root for parentless
6374                 $hash_parent_param =
6375                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6376         }
6377
6378         # read commitdiff
6379         my $fd;
6380         my @difftree;
6381         if ($format eq 'html') {
6382                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6383                         "--no-commit-id", "--patch-with-raw", "--full-index",
6384                         $hash_parent_param, $hash, "--"
6385                         or die_error(500, "Open git-diff-tree failed");
6386
6387                 while (my $line = <$fd>) {
6388                         chomp $line;
6389                         # empty line ends raw part of diff-tree output
6390                         last unless $line;
6391                         push @difftree, scalar parse_difftree_raw_line($line);
6392                 }
6393
6394         } elsif ($format eq 'plain') {
6395                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6396                         '-p', $hash_parent_param, $hash, "--"
6397                         or die_error(500, "Open git-diff-tree failed");
6398         } elsif ($format eq 'patch') {
6399                 # For commit ranges, we limit the output to the number of
6400                 # patches specified in the 'patches' feature.
6401                 # For single commits, we limit the output to a single patch,
6402                 # diverging from the git-format-patch default.
6403                 my @commit_spec = ();
6404                 if ($hash_parent) {
6405                         if ($patch_max > 0) {
6406                                 push @commit_spec, "-$patch_max";
6407                         }
6408                         push @commit_spec, '-n', "$hash_parent..$hash";
6409                 } else {
6410                         if ($params{-single}) {
6411                                 push @commit_spec, '-1';
6412                         } else {
6413                                 if ($patch_max > 0) {
6414                                         push @commit_spec, "-$patch_max";
6415                                 }
6416                                 push @commit_spec, "-n";
6417                         }
6418                         push @commit_spec, '--root', $hash;
6419                 }
6420                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6421                         '--encoding=utf8', '--stdout', @commit_spec
6422                         or die_error(500, "Open git-format-patch failed");
6423         } else {
6424                 die_error(400, "Unknown commitdiff format");
6425         }
6426
6427         # non-textual hash id's can be cached
6428         my $expires;
6429         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6430                 $expires = "+1d";
6431         }
6432
6433         # write commit message
6434         if ($format eq 'html') {
6435                 my $refs = git_get_references();
6436                 my $ref = format_ref_marker($refs, $co{'id'});
6437
6438                 git_header_html(undef, $expires);
6439                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6440                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6441                 print "<div class=\"title_text\">\n" .
6442                       "<table class=\"object_header\">\n";
6443                 git_print_authorship_rows(\%co);
6444                 print "</table>".
6445                       "</div>\n";
6446                 print "<div class=\"page_body\">\n";
6447                 if (@{$co{'comment'}} > 1) {
6448                         print "<div class=\"log\">\n";
6449                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6450                         print "</div>\n"; # class="log"
6451                 }
6452
6453         } elsif ($format eq 'plain') {
6454                 my $refs = git_get_references("tags");
6455                 my $tagname = git_get_rev_name_tags($hash);
6456                 my $filename = basename($project) . "-$hash.patch";
6457
6458                 print $cgi->header(
6459                         -type => 'text/plain',
6460                         -charset => 'utf-8',
6461                         -expires => $expires,
6462                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6463                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6464                 print "From: " . to_utf8($co{'author'}) . "\n";
6465                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6466                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6467
6468                 print "X-Git-Tag: $tagname\n" if $tagname;
6469                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6470
6471                 foreach my $line (@{$co{'comment'}}) {
6472                         print to_utf8($line) . "\n";
6473                 }
6474                 print "---\n\n";
6475         } elsif ($format eq 'patch') {
6476                 my $filename = basename($project) . "-$hash.patch";
6477
6478                 print $cgi->header(
6479                         -type => 'text/plain',
6480                         -charset => 'utf-8',
6481                         -expires => $expires,
6482                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6483         }
6484
6485         # write patch
6486         if ($format eq 'html') {
6487                 my $use_parents = !defined $hash_parent ||
6488                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6489                 git_difftree_body(\@difftree, $hash,
6490                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6491                 print "<br/>\n";
6492
6493                 git_patchset_body($fd, \@difftree, $hash,
6494                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6495                 close $fd;
6496                 print "</div>\n"; # class="page_body"
6497                 git_footer_html();
6498
6499         } elsif ($format eq 'plain') {
6500                 local $/ = undef;
6501                 print <$fd>;
6502                 close $fd
6503                         or print "Reading git-diff-tree failed\n";
6504         } elsif ($format eq 'patch') {
6505                 local $/ = undef;
6506                 print <$fd>;
6507                 close $fd
6508                         or print "Reading git-format-patch failed\n";
6509         }
6510 }
6511
6512 sub git_commitdiff_plain {
6513         git_commitdiff(-format => 'plain');
6514 }
6515
6516 # format-patch-style patches
6517 sub git_patch {
6518         git_commitdiff(-format => 'patch', -single => 1);
6519 }
6520
6521 sub git_patches {
6522         git_commitdiff(-format => 'patch');
6523 }
6524
6525 sub git_history {
6526         git_log_generic('history', \&git_history_body,
6527                         $hash_base, $hash_parent_base,
6528                         $file_name, $hash);
6529 }
6530
6531 sub git_search {
6532         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6533         if (!defined $searchtext) {
6534                 die_error(400, "Text field is empty");
6535         }
6536         if (!defined $hash) {
6537                 $hash = git_get_head_hash($project);
6538         }
6539         my %co = parse_commit($hash);
6540         if (!%co) {
6541                 die_error(404, "Unknown commit object");
6542         }
6543         if (!defined $page) {
6544                 $page = 0;
6545         }
6546
6547         $searchtype ||= 'commit';
6548         if ($searchtype eq 'pickaxe') {
6549                 # pickaxe may take all resources of your box and run for several minutes
6550                 # with every query - so decide by yourself how public you make this feature
6551                 gitweb_check_feature('pickaxe')
6552                     or die_error(403, "Pickaxe is disabled");
6553         }
6554         if ($searchtype eq 'grep') {
6555                 gitweb_check_feature('grep')[0]
6556                     or die_error(403, "Grep is disabled");
6557         }
6558
6559         git_header_html();
6560
6561         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6562                 my $greptype;
6563                 if ($searchtype eq 'commit') {
6564                         $greptype = "--grep=";
6565                 } elsif ($searchtype eq 'author') {
6566                         $greptype = "--author=";
6567                 } elsif ($searchtype eq 'committer') {
6568                         $greptype = "--committer=";
6569                 }
6570                 $greptype .= $searchtext;
6571                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6572                                                $greptype, '--regexp-ignore-case',
6573                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6574
6575                 my $paging_nav = '';
6576                 if ($page > 0) {
6577                         $paging_nav .=
6578                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6579                                                        searchtext=>$searchtext,
6580                                                        searchtype=>$searchtype)},
6581                                         "first");
6582                         $paging_nav .= " &sdot; " .
6583                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6584                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6585                 } else {
6586                         $paging_nav .= "first";
6587                         $paging_nav .= " &sdot; prev";
6588                 }
6589                 my $next_link = '';
6590                 if ($#commitlist >= 100) {
6591                         $next_link =
6592                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6593                                          -accesskey => "n", -title => "Alt-n"}, "next");
6594                         $paging_nav .= " &sdot; $next_link";
6595                 } else {
6596                         $paging_nav .= " &sdot; next";
6597                 }
6598
6599                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6600                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6601                 if ($page == 0 && !@commitlist) {
6602                         print "<p>No match.</p>\n";
6603                 } else {
6604                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6605                 }
6606         }
6607
6608         if ($searchtype eq 'pickaxe') {
6609                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6610                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6611
6612                 print "<table class=\"pickaxe search\">\n";
6613                 my $alternate = 1;
6614                 local $/ = "\n";
6615                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6616                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6617                         ($search_use_regexp ? '--pickaxe-regex' : ());
6618                 undef %co;
6619                 my @files;
6620                 while (my $line = <$fd>) {
6621                         chomp $line;
6622                         next unless $line;
6623
6624                         my %set = parse_difftree_raw_line($line);
6625                         if (defined $set{'commit'}) {
6626                                 # finish previous commit
6627                                 if (%co) {
6628                                         print "</td>\n" .
6629                                               "<td class=\"link\">" .
6630                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6631                                               " | " .
6632                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6633                                         print "</td>\n" .
6634                                               "</tr>\n";
6635                                 }
6636
6637                                 if ($alternate) {
6638                                         print "<tr class=\"dark\">\n";
6639                                 } else {
6640                                         print "<tr class=\"light\">\n";
6641                                 }
6642                                 $alternate ^= 1;
6643                                 %co = parse_commit($set{'commit'});
6644                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6645                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6646                                       "<td><i>$author</i></td>\n" .
6647                                       "<td>" .
6648                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6649                                               -class => "list subject"},
6650                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6651                         } elsif (defined $set{'to_id'}) {
6652                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6653
6654                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6655                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6656                                               -class => "list"},
6657                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6658                                       "<br/>\n";
6659                         }
6660                 }
6661                 close $fd;
6662
6663                 # finish last commit (warning: repetition!)
6664                 if (%co) {
6665                         print "</td>\n" .
6666                               "<td class=\"link\">" .
6667                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6668                               " | " .
6669                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6670                         print "</td>\n" .
6671                               "</tr>\n";
6672                 }
6673
6674                 print "</table>\n";
6675         }
6676
6677         if ($searchtype eq 'grep') {
6678                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6679                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6680
6681                 print "<table class=\"grep_search\">\n";
6682                 my $alternate = 1;
6683                 my $matches = 0;
6684                 local $/ = "\n";
6685                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6686                         $search_use_regexp ? ('-E', '-i') : '-F',
6687                         $searchtext, $co{'tree'};
6688                 my $lastfile = '';
6689                 while (my $line = <$fd>) {
6690                         chomp $line;
6691                         my ($file, $lno, $ltext, $binary);
6692                         last if ($matches++ > 1000);
6693                         if ($line =~ /^Binary file (.+) matches$/) {
6694                                 $file = $1;
6695                                 $binary = 1;
6696                         } else {
6697                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6698                         }
6699                         if ($file ne $lastfile) {
6700                                 $lastfile and print "</td></tr>\n";
6701                                 if ($alternate++) {
6702                                         print "<tr class=\"dark\">\n";
6703                                 } else {
6704                                         print "<tr class=\"light\">\n";
6705                                 }
6706                                 print "<td class=\"list\">".
6707                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6708                                                                file_name=>"$file"),
6709                                                 -class => "list"}, esc_path($file));
6710                                 print "</td><td>\n";
6711                                 $lastfile = $file;
6712                         }
6713                         if ($binary) {
6714                                 print "<div class=\"binary\">Binary file</div>\n";
6715                         } else {
6716                                 $ltext = untabify($ltext);
6717                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6718                                         $ltext = esc_html($1, -nbsp=>1);
6719                                         $ltext .= '<span class="match">';
6720                                         $ltext .= esc_html($2, -nbsp=>1);
6721                                         $ltext .= '</span>';
6722                                         $ltext .= esc_html($3, -nbsp=>1);
6723                                 } else {
6724                                         $ltext = esc_html($ltext, -nbsp=>1);
6725                                 }
6726                                 print "<div class=\"pre\">" .
6727                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6728                                                                file_name=>"$file").'#l'.$lno,
6729                                                 -class => "linenr"}, sprintf('%4i', $lno))
6730                                         . ' ' .  $ltext . "</div>\n";
6731                         }
6732                 }
6733                 if ($lastfile) {
6734                         print "</td></tr>\n";
6735                         if ($matches > 1000) {
6736                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6737                         }
6738                 } else {
6739                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6740                 }
6741                 close $fd;
6742
6743                 print "</table>\n";
6744         }
6745         git_footer_html();
6746 }
6747
6748 sub git_search_help {
6749         git_header_html();
6750         git_print_page_nav('','', $hash,$hash,$hash);
6751         print <<EOT;
6752 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6753 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6754 the pattern entered is recognized as the POSIX extended
6755 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6756 insensitive).</p>
6757 <dl>
6758 <dt><b>commit</b></dt>
6759 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6760 EOT
6761         my $have_grep = gitweb_check_feature('grep');
6762         if ($have_grep) {
6763                 print <<EOT;
6764 <dt><b>grep</b></dt>
6765 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6766     a different one) are searched for the given pattern. On large trees, this search can take
6767 a while and put some strain on the server, so please use it with some consideration. Note that
6768 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6769 case-sensitive.</dd>
6770 EOT
6771         }
6772         print <<EOT;
6773 <dt><b>author</b></dt>
6774 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6775 <dt><b>committer</b></dt>
6776 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6777 EOT
6778         my $have_pickaxe = gitweb_check_feature('pickaxe');
6779         if ($have_pickaxe) {
6780                 print <<EOT;
6781 <dt><b>pickaxe</b></dt>
6782 <dd>All commits that caused the string to appear or disappear from any file (changes that
6783 added, removed or "modified" the string) will be listed. This search can take a while and
6784 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6785 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6786 EOT
6787         }
6788         print "</dl>\n";
6789         git_footer_html();
6790 }
6791
6792 sub git_shortlog {
6793         git_log_generic('shortlog', \&git_shortlog_body,
6794                         $hash, $hash_parent);
6795 }
6796
6797 ## ......................................................................
6798 ## feeds (RSS, Atom; OPML)
6799
6800 sub git_feed {
6801         my $format = shift || 'atom';
6802         my $have_blame = gitweb_check_feature('blame');
6803
6804         # Atom: http://www.atomenabled.org/developers/syndication/
6805         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6806         if ($format ne 'rss' && $format ne 'atom') {
6807                 die_error(400, "Unknown web feed format");
6808         }
6809
6810         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6811         my $head = $hash || 'HEAD';
6812         my @commitlist = parse_commits($head, 150, 0, $file_name);
6813
6814         my %latest_commit;
6815         my %latest_date;
6816         my $content_type = "application/$format+xml";
6817         if (defined $cgi->http('HTTP_ACCEPT') &&
6818                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6819                 # browser (feed reader) prefers text/xml
6820                 $content_type = 'text/xml';
6821         }
6822         if (defined($commitlist[0])) {
6823                 %latest_commit = %{$commitlist[0]};
6824                 my $latest_epoch = $latest_commit{'committer_epoch'};
6825                 %latest_date   = parse_date($latest_epoch);
6826                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6827                 if (defined $if_modified) {
6828                         my $since;
6829                         if (eval { require HTTP::Date; 1; }) {
6830                                 $since = HTTP::Date::str2time($if_modified);
6831                         } elsif (eval { require Time::ParseDate; 1; }) {
6832                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6833                         }
6834                         if (defined $since && $latest_epoch <= $since) {
6835                                 print $cgi->header(
6836                                         -type => $content_type,
6837                                         -charset => 'utf-8',
6838                                         -last_modified => $latest_date{'rfc2822'},
6839                                         -status => '304 Not Modified');
6840                                 return;
6841                         }
6842                 }
6843                 print $cgi->header(
6844                         -type => $content_type,
6845                         -charset => 'utf-8',
6846                         -last_modified => $latest_date{'rfc2822'});
6847         } else {
6848                 print $cgi->header(
6849                         -type => $content_type,
6850                         -charset => 'utf-8');
6851         }
6852
6853         # Optimization: skip generating the body if client asks only
6854         # for Last-Modified date.
6855         return if ($cgi->request_method() eq 'HEAD');
6856
6857         # header variables
6858         my $title = "$site_name - $project/$action";
6859         my $feed_type = 'log';
6860         if (defined $hash) {
6861                 $title .= " - '$hash'";
6862                 $feed_type = 'branch log';
6863                 if (defined $file_name) {
6864                         $title .= " :: $file_name";
6865                         $feed_type = 'history';
6866                 }
6867         } elsif (defined $file_name) {
6868                 $title .= " - $file_name";
6869                 $feed_type = 'history';
6870         }
6871         $title .= " $feed_type";
6872         my $descr = git_get_project_description($project);
6873         if (defined $descr) {
6874                 $descr = esc_html($descr);
6875         } else {
6876                 $descr = "$project " .
6877                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6878                          " feed";
6879         }
6880         my $owner = git_get_project_owner($project);
6881         $owner = esc_html($owner);
6882
6883         #header
6884         my $alt_url;
6885         if (defined $file_name) {
6886                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6887         } elsif (defined $hash) {
6888                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6889         } else {
6890                 $alt_url = href(-full=>1, action=>"summary");
6891         }
6892         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6893         if ($format eq 'rss') {
6894                 print <<XML;
6895 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6896 <channel>
6897 XML
6898                 print "<title>$title</title>\n" .
6899                       "<link>$alt_url</link>\n" .
6900                       "<description>$descr</description>\n" .
6901                       "<language>en</language>\n" .
6902                       # project owner is responsible for 'editorial' content
6903                       "<managingEditor>$owner</managingEditor>\n";
6904                 if (defined $logo || defined $favicon) {
6905                         # prefer the logo to the favicon, since RSS
6906                         # doesn't allow both
6907                         my $img = esc_url($logo || $favicon);
6908                         print "<image>\n" .
6909                               "<url>$img</url>\n" .
6910                               "<title>$title</title>\n" .
6911                               "<link>$alt_url</link>\n" .
6912                               "</image>\n";
6913                 }
6914                 if (%latest_date) {
6915                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6916                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6917                 }
6918                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6919         } elsif ($format eq 'atom') {
6920                 print <<XML;
6921 <feed xmlns="http://www.w3.org/2005/Atom">
6922 XML
6923                 print "<title>$title</title>\n" .
6924                       "<subtitle>$descr</subtitle>\n" .
6925                       '<link rel="alternate" type="text/html" href="' .
6926                       $alt_url . '" />' . "\n" .
6927                       '<link rel="self" type="' . $content_type . '" href="' .
6928                       $cgi->self_url() . '" />' . "\n" .
6929                       "<id>" . href(-full=>1) . "</id>\n" .
6930                       # use project owner for feed author
6931                       "<author><name>$owner</name></author>\n";
6932                 if (defined $favicon) {
6933                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6934                 }
6935                 if (defined $logo_url) {
6936                         # not twice as wide as tall: 72 x 27 pixels
6937                         print "<logo>" . esc_url($logo) . "</logo>\n";
6938                 }
6939                 if (! %latest_date) {
6940                         # dummy date to keep the feed valid until commits trickle in:
6941                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6942                 } else {
6943                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6944                 }
6945                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6946         }
6947
6948         # contents
6949         for (my $i = 0; $i <= $#commitlist; $i++) {
6950                 my %co = %{$commitlist[$i]};
6951                 my $commit = $co{'id'};
6952                 # we read 150, we always show 30 and the ones more recent than 48 hours
6953                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6954                         last;
6955                 }
6956                 my %cd = parse_date($co{'author_epoch'});
6957
6958                 # get list of changed files
6959                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6960                         $co{'parent'} || "--root",
6961                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6962                         or next;
6963                 my @difftree = map { chomp; $_ } <$fd>;
6964                 close $fd
6965                         or next;
6966
6967                 # print element (entry, item)
6968                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6969                 if ($format eq 'rss') {
6970                         print "<item>\n" .
6971                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6972                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6973                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6974                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6975                               "<link>$co_url</link>\n" .
6976                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6977                               "<content:encoded>" .
6978                               "<![CDATA[\n";
6979                 } elsif ($format eq 'atom') {
6980                         print "<entry>\n" .
6981                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6982                               "<updated>$cd{'iso-8601'}</updated>\n" .
6983                               "<author>\n" .
6984                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6985                         if ($co{'author_email'}) {
6986                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6987                         }
6988                         print "</author>\n" .
6989                               # use committer for contributor
6990                               "<contributor>\n" .
6991                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6992                         if ($co{'committer_email'}) {
6993                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6994                         }
6995                         print "</contributor>\n" .
6996                               "<published>$cd{'iso-8601'}</published>\n" .
6997                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6998                               "<id>$co_url</id>\n" .
6999                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7000                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7001                 }
7002                 my $comment = $co{'comment'};
7003                 print "<pre>\n";
7004                 foreach my $line (@$comment) {
7005                         $line = esc_html($line);
7006                         print "$line\n";
7007                 }
7008                 print "</pre><ul>\n";
7009                 foreach my $difftree_line (@difftree) {
7010                         my %difftree = parse_difftree_raw_line($difftree_line);
7011                         next if !$difftree{'from_id'};
7012
7013                         my $file = $difftree{'file'} || $difftree{'to_file'};
7014
7015                         print "<li>" .
7016                               "[" .
7017                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7018                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7019                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7020                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7021                                       -title => "diff"}, 'D');
7022                         if ($have_blame) {
7023                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7024                                                              file_name=>$file, hash_base=>$commit),
7025                                               -title => "blame"}, 'B');
7026                         }
7027                         # if this is not a feed of a file history
7028                         if (!defined $file_name || $file_name ne $file) {
7029                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7030                                                              file_name=>$file, hash=>$commit),
7031                                               -title => "history"}, 'H');
7032                         }
7033                         $file = esc_path($file);
7034                         print "] ".
7035                               "$file</li>\n";
7036                 }
7037                 if ($format eq 'rss') {
7038                         print "</ul>]]>\n" .
7039                               "</content:encoded>\n" .
7040                               "</item>\n";
7041                 } elsif ($format eq 'atom') {
7042                         print "</ul>\n</div>\n" .
7043                               "</content>\n" .
7044                               "</entry>\n";
7045                 }
7046         }
7047
7048         # end of feed
7049         if ($format eq 'rss') {
7050                 print "</channel>\n</rss>\n";
7051         } elsif ($format eq 'atom') {
7052                 print "</feed>\n";
7053         }
7054 }
7055
7056 sub git_rss {
7057         git_feed('rss');
7058 }
7059
7060 sub git_atom {
7061         git_feed('atom');
7062 }
7063
7064 sub git_opml {
7065         my @list = git_get_projects_list();
7066
7067         print $cgi->header(
7068                 -type => 'text/xml',
7069                 -charset => 'utf-8',
7070                 -content_disposition => 'inline; filename="opml.xml"');
7071
7072         print <<XML;
7073 <?xml version="1.0" encoding="utf-8"?>
7074 <opml version="1.0">
7075 <head>
7076   <title>$site_name OPML Export</title>
7077 </head>
7078 <body>
7079 <outline text="git RSS feeds">
7080 XML
7081
7082         foreach my $pr (@list) {
7083                 my %proj = %$pr;
7084                 my $head = git_get_head_hash($proj{'path'});
7085                 if (!defined $head) {
7086                         next;
7087                 }
7088                 $git_dir = "$projectroot/$proj{'path'}";
7089                 my %co = parse_commit($head);
7090                 if (!%co) {
7091                         next;
7092                 }
7093
7094                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7095                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7096                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7097                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7098         }
7099         print <<XML;
7100 </outline>
7101 </body>
7102 </opml>
7103 XML
7104 }