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