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