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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 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
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # default order of projects list
 122 # valid values are none, project, descr, owner, and age
 123 our $default_projects_order = "project";
 124
 125 # show repository only if this file exists
 126 # (only effective if this variable evaluates to true)
 127 our $export_ok = "++GITWEB_EXPORT_OK++";
 128
 129 # show repository only if this subroutine returns true
 130 # when given the path to the project, for example:
 131 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 132 our $export_auth_hook = undef;
 133
 134 # only allow viewing of repositories also shown on the overview page
 135 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 136
 137 # list of git base URLs used for URL to where fetch project from,
 138 # i.e. full URL is "$git_base_url/$project"
 139 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 140
 141 # default blob_plain mimetype and default charset for text/plain blob
 142 our $default_blob_plain_mimetype = 'text/plain';
 143 our $default_text_plain_charset  = undef;
 144
 145 # file to use for guessing MIME types before trying /etc/mime.types
 146 # (relative to the current git repository)
 147 our $mimetypes_file = undef;
 148
 149 # assume this charset if line contains non-UTF-8 characters;
 150 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 151 # for which encoding all byte sequences are valid, for example
 152 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 153 # could be even 'utf-8' for the old behavior)
 154 our $fallback_encoding = 'latin1';
 155
 156 # rename detection options for git-diff and git-diff-tree
 157 # - default is '-M', with the cost proportional to
 158 #   (number of removed files) * (number of new files).
 159 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 160 #   (number of changed files + number of removed files) * (number of new files)
 161 # - even more costly is '-C', '--find-copies-harder' with cost
 162 #   (number of files in the original tree) * (number of new files)
 163 # - one might want to include '-B' option, e.g. '-B', '-M'
 164 our @diff_opts = ('-M'); # taken from git_commit
 165
 166 # Disables features that would allow repository owners to inject script into
 167 # the gitweb domain.
 168 our $prevent_xss = 0;
 169
 170 # Path to the highlight executable to use (must be the one from
 171 # http://www.andre-simon.de due to assumptions about parameters and output).
 172 # Useful if highlight is not installed on your webserver's PATH.
 173 # [Default: highlight]
 174 our $highlight_bin = "++HIGHLIGHT_BIN++";
 175
 176 # information about snapshot formats that gitweb is capable of serving
 177 our %known_snapshot_formats = (
 178         # name => {
 179         #       'display' => display name,
 180         #       'type' => mime type,
 181         #       'suffix' => filename suffix,
 182         #       'format' => --format for git-archive,
 183         #       'compressor' => [compressor command and arguments]
 184         #                       (array reference, optional)
 185         #       'disabled' => boolean (optional)}
 186         #
 187         'tgz' => {
 188                 'display' => 'tar.gz',
 189                 'type' => 'application/x-gzip',
 190                 'suffix' => '.tar.gz',
 191                 'format' => 'tar',
 192                 'compressor' => ['gzip']},
 193
 194         'tbz2' => {
 195                 'display' => 'tar.bz2',
 196                 'type' => 'application/x-bzip2',
 197                 'suffix' => '.tar.bz2',
 198                 'format' => 'tar',
 199                 'compressor' => ['bzip2']},
 200
 201         'txz' => {
 202                 'display' => 'tar.xz',
 203                 'type' => 'application/x-xz',
 204                 'suffix' => '.tar.xz',
 205                 'format' => 'tar',
 206                 'compressor' => ['xz'],
 207                 'disabled' => 1},
 208
 209         'zip' => {
 210                 'display' => 'zip',
 211                 'type' => 'application/x-zip',
 212                 'suffix' => '.zip',
 213                 'format' => 'zip'},
 214 );
 215
 216 # Aliases so we understand old gitweb.snapshot values in repository
 217 # configuration.
 218 our %known_snapshot_format_aliases = (
 219         'gzip'  => 'tgz',
 220         'bzip2' => 'tbz2',
 221         'xz'    => 'txz',
 222
 223         # backward compatibility: legacy gitweb config support
 224         'x-gzip' => undef, 'gz' => undef,
 225         'x-bzip2' => undef, 'bz2' => undef,
 226         'x-zip' => undef, '' => undef,
 227 );
 228
 229 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 230 # are changed, it may be appropriate to change these values too via
 231 # $GITWEB_CONFIG.
 232 our %avatar_size = (
 233         'default' => 16,
 234         'double'  => 32
 235 );
 236
 237 # Used to set the maximum load that we will still respond to gitweb queries.
 238 # If server load exceed this value then return "503 server busy" error.
 239 # If gitweb cannot determined server load, it is taken to be 0.
 240 # Leave it undefined (or set to 'undef') to turn off load checking.
 241 our $maxload = 300;
 242
 243 # configuration for 'highlight' (http://www.andre-simon.de/)
 244 # match by basename
 245 our %highlight_basename = (
 246         #'Program' => 'py',
 247         #'Library' => 'py',
 248         'SConstruct' => 'py', # SCons equivalent of Makefile
 249         'Makefile' => 'make',
 250 );
 251 # match by extension
 252 our %highlight_ext = (
 253         # main extensions, defining name of syntax;
 254         # see files in /usr/share/highlight/langDefs/ directory
 255         map { $_ => $_ }
 256                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 257         # alternate extensions, see /etc/highlight/filetypes.conf
 258         'h' => 'c',
 259         map { $_ => 'cpp' } qw(cxx c++ cc),
 260         map { $_ => 'php' } qw(php3 php4),
 261         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 262         'mak' => 'make',
 263         map { $_ => 'xml' } qw(xhtml html htm),
 264 );
 265
 266 # You define site-wide feature defaults here; override them with
 267 # $GITWEB_CONFIG as necessary.
 268 our %feature = (
 269         # feature => {
 270         #       'sub' => feature-sub (subroutine),
 271         #       'override' => allow-override (boolean),
 272         #       'default' => [ default options...] (array reference)}
 273         #
 274         # if feature is overridable (it means that allow-override has true value),
 275         # then feature-sub will be called with default options as parameters;
 276         # return value of feature-sub indicates if to enable specified feature
 277         #
 278         # if there is no 'sub' key (no feature-sub), then feature cannot be
 279         # overridden
 280         #
 281         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 282         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 283         # is enabled
 284
 285         # Enable the 'blame' blob view, showing the last commit that modified
 286         # each line in the file. This can be very CPU-intensive.
 287
 288         # To enable system wide have in $GITWEB_CONFIG
 289         # $feature{'blame'}{'default'} = [1];
 290         # To have project specific config enable override in $GITWEB_CONFIG
 291         # $feature{'blame'}{'override'} = 1;
 292         # and in project config gitweb.blame = 0|1;
 293         'blame' => {
 294                 'sub' => sub { feature_bool('blame', @_) },
 295                 'override' => 0,
 296                 'default' => [0]},
 297
 298         # Enable the 'snapshot' link, providing a compressed archive of any
 299         # tree. This can potentially generate high traffic if you have large
 300         # project.
 301
 302         # Value is a list of formats defined in %known_snapshot_formats that
 303         # you wish to offer.
 304         # To disable system wide have in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'default'} = [];
 306         # To have project specific config enable override in $GITWEB_CONFIG
 307         # $feature{'snapshot'}{'override'} = 1;
 308         # and in project config, a comma-separated list of formats or "none"
 309         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 310         'snapshot' => {
 311                 'sub' => \&feature_snapshot,
 312                 'override' => 0,
 313                 'default' => ['tgz']},
 314
 315         # Enable text search, which will list the commits which match author,
 316         # committer or commit text to a given string.  Enabled by default.
 317         # Project specific override is not supported.
 318         'search' => {
 319                 'override' => 0,
 320                 'default' => [1]},
 321
 322         # Enable grep search, which will list the files in currently selected
 323         # tree containing the given string. Enabled by default. This can be
 324         # potentially CPU-intensive, of course.
 325
 326         # To enable system wide have in $GITWEB_CONFIG
 327         # $feature{'grep'}{'default'} = [1];
 328         # To have project specific config enable override in $GITWEB_CONFIG
 329         # $feature{'grep'}{'override'} = 1;
 330         # and in project config gitweb.grep = 0|1;
 331         'grep' => {
 332                 'sub' => sub { feature_bool('grep', @_) },
 333                 'override' => 0,
 334                 'default' => [1]},
 335
 336         # Enable the pickaxe search, which will list the commits that modified
 337         # a given string in a file. This can be practical and quite faster
 338         # alternative to 'blame', but still potentially CPU-intensive.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'pickaxe'}{'override'} = 1;
 344         # and in project config gitweb.pickaxe = 0|1;
 345         'pickaxe' => {
 346                 'sub' => sub { feature_bool('pickaxe', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable showing size of blobs in a 'tree' view, in a separate
 351         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 352
 353         # To disable system wide have in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'default'} = [0];
 355         # To have project specific config enable override in $GITWEB_CONFIG
 356         # $feature{'show-sizes'}{'override'} = 1;
 357         # and in project config gitweb.showsizes = 0|1;
 358         'show-sizes' => {
 359                 'sub' => sub { feature_bool('showsizes', @_) },
 360                 'override' => 0,
 361                 'default' => [1]},
 362
 363         # Make gitweb use an alternative format of the URLs which can be
 364         # more readable and natural-looking: project name is embedded
 365         # directly in the path and the query string contains other
 366         # auxiliary information. All gitweb installations recognize
 367         # URL in either format; this configures in which formats gitweb
 368         # generates links.
 369
 370         # To enable system wide have in $GITWEB_CONFIG
 371         # $feature{'pathinfo'}{'default'} = [1];
 372         # Project specific override is not supported.
 373
 374         # Note that you will need to change the default location of CSS,
 375         # favicon, logo and possibly other files to an absolute URL. Also,
 376         # if gitweb.cgi serves as your indexfile, you will need to force
 377         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 378         'pathinfo' => {
 379                 'override' => 0,
 380                 'default' => [0]},
 381
 382         # Make gitweb consider projects in project root subdirectories
 383         # to be forks of existing projects. Given project $projname.git,
 384         # projects matching $projname/*.git will not be shown in the main
 385         # projects list, instead a '+' mark will be added to $projname
 386         # there and a 'forks' view will be enabled for the project, listing
 387         # all the forks. If project list is taken from a file, forks have
 388         # to be listed after the main project.
 389
 390         # To enable system wide have in $GITWEB_CONFIG
 391         # $feature{'forks'}{'default'} = [1];
 392         # Project specific override is not supported.
 393         'forks' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Insert custom links to the action bar of all project pages.
 398         # This enables you mainly to link to third-party scripts integrating
 399         # into gitweb; e.g. git-browser for graphical history representation
 400         # or custom web-based repository administration interface.
 401
 402         # The 'default' value consists of a list of triplets in the form
 403         # (label, link, position) where position is the label after which
 404         # to insert the link and link is a format string where %n expands
 405         # to the project name, %f to the project path within the filesystem,
 406         # %h to the current hash (h gitweb parameter) and %b to the current
 407         # hash base (hb gitweb parameter); %% expands to %.
 408
 409         # To enable system wide have in $GITWEB_CONFIG e.g.
 410         # $feature{'actions'}{'default'} = [('graphiclog',
 411         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 412         # Project specific override is not supported.
 413         'actions' => {
 414                 'override' => 0,
 415                 'default' => []},
 416
 417         # Allow gitweb scan project content tags described in ctags/
 418         # of project repository, and display the popular Web 2.0-ish
 419         # "tag cloud" near the project list. Note that this is something
 420         # COMPLETELY different from the normal Git tags.
 421
 422         # gitweb by itself can show existing tags, but it does not handle
 423         # tagging itself; you need an external application for that.
 424         # For an example script, check Girocco's cgi/tagproj.cgi.
 425         # You may want to install the HTML::TagCloud Perl module to get
 426         # a pretty tag cloud instead of just a list of tags.
 427
 428         # To enable system wide have in $GITWEB_CONFIG
 429         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 430         # Project specific override is not supported.
 431         'ctags' => {
 432                 'override' => 0,
 433                 'default' => [0]},
 434
 435         # The maximum number of patches in a patchset generated in patch
 436         # view. Set this to 0 or undef to disable patch view, or to a
 437         # negative number to remove any limit.
 438
 439         # To disable system wide have in $GITWEB_CONFIG
 440         # $feature{'patches'}{'default'} = [0];
 441         # To have project specific config enable override in $GITWEB_CONFIG
 442         # $feature{'patches'}{'override'} = 1;
 443         # and in project config gitweb.patches = 0|n;
 444         # where n is the maximum number of patches allowed in a patchset.
 445         'patches' => {
 446                 'sub' => \&feature_patches,
 447                 'override' => 0,
 448                 'default' => [16]},
 449
 450         # Avatar support. When this feature is enabled, views such as
 451         # shortlog or commit will display an avatar associated with
 452         # the email of the committer(s) and/or author(s).
 453
 454         # Currently available providers are gravatar and picon.
 455         # If an unknown provider is specified, the feature is disabled.
 456
 457         # Gravatar depends on Digest::MD5.
 458         # Picon currently relies on the indiana.edu database.
 459
 460         # To enable system wide have in $GITWEB_CONFIG
 461         # $feature{'avatar'}{'default'} = ['<provider>'];
 462         # where <provider> is either gravatar or picon.
 463         # To have project specific config enable override in $GITWEB_CONFIG
 464         # $feature{'avatar'}{'override'} = 1;
 465         # and in project config gitweb.avatar = <provider>;
 466         'avatar' => {
 467                 'sub' => \&feature_avatar,
 468                 'override' => 0,
 469                 'default' => ['']},
 470
 471         # Enable displaying how much time and how many git commands
 472         # it took to generate and display page.  Disabled by default.
 473         # Project specific override is not supported.
 474         'timed' => {
 475                 'override' => 0,
 476                 'default' => [0]},
 477
 478         # Enable turning some links into links to actions which require
 479         # JavaScript to run (like 'blame_incremental').  Not enabled by
 480         # default.  Project specific override is currently not supported.
 481         'javascript-actions' => {
 482                 'override' => 0,
 483                 'default' => [0]},
 484
 485         # Syntax highlighting support. This is based on Daniel Svensson's
 486         # and Sham Chukoury's work in gitweb-xmms2.git.
 487         # It requires the 'highlight' program present in $PATH,
 488         # and therefore is disabled by default.
 489
 490         # To enable system wide have in $GITWEB_CONFIG
 491         # $feature{'highlight'}{'default'} = [1];
 492
 493         'highlight' => {
 494                 'sub' => sub { feature_bool('highlight', @_) },
 495                 'override' => 0,
 496                 'default' => [0]},
 497 );
 498
 499 sub gitweb_get_feature {
 500         my ($name) = @_;
 501         return unless exists $feature{$name};
 502         my ($sub, $override, @defaults) = (
 503                 $feature{$name}{'sub'},
 504                 $feature{$name}{'override'},
 505                 @{$feature{$name}{'default'}});
 506         # project specific override is possible only if we have project
 507         our $git_dir; # global variable, declared later
 508         if (!$override || !defined $git_dir) {
 509                 return @defaults;
 510         }
 511         if (!defined $sub) {
 512                 warn "feature $name is not overridable";
 513                 return @defaults;
 514         }
 515         return $sub->(@defaults);
 516 }
 517
 518 # A wrapper to check if a given feature is enabled.
 519 # With this, you can say
 520 #
 521 #   my $bool_feat = gitweb_check_feature('bool_feat');
 522 #   gitweb_check_feature('bool_feat') or somecode;
 523 #
 524 # instead of
 525 #
 526 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 527 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 528 #
 529 sub gitweb_check_feature {
 530         return (gitweb_get_feature(@_))[0];
 531 }
 532
 533
 534 sub feature_bool {
 535         my $key = shift;
 536         my ($val) = git_get_project_config($key, '--bool');
 537
 538         if (!defined $val) {
 539                 return ($_[0]);
 540         } elsif ($val eq 'true') {
 541                 return (1);
 542         } elsif ($val eq 'false') {
 543                 return (0);
 544         }
 545 }
 546
 547 sub feature_snapshot {
 548         my (@fmts) = @_;
 549
 550         my ($val) = git_get_project_config('snapshot');
 551
 552         if ($val) {
 553                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 554         }
 555
 556         return @fmts;
 557 }
 558
 559 sub feature_patches {
 560         my @val = (git_get_project_config('patches', '--int'));
 561
 562         if (@val) {
 563                 return @val;
 564         }
 565
 566         return ($_[0]);
 567 }
 568
 569 sub feature_avatar {
 570         my @val = (git_get_project_config('avatar'));
 571
 572         return @val ? @val : @_;
 573 }
 574
 575 # checking HEAD file with -e is fragile if the repository was
 576 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 577 # and then pruned.
 578 sub check_head_link {
 579         my ($dir) = @_;
 580         my $headfile = "$dir/HEAD";
 581         return ((-e $headfile) ||
 582                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 583 }
 584
 585 sub check_export_ok {
 586         my ($dir) = @_;
 587         return (check_head_link($dir) &&
 588                 (!$export_ok || -e "$dir/$export_ok") &&
 589                 (!$export_auth_hook || $export_auth_hook->($dir)));
 590 }
 591
 592 # process alternate names for backward compatibility
 593 # filter out unsupported (unknown) snapshot formats
 594 sub filter_snapshot_fmts {
 595         my @fmts = @_;
 596
 597         @fmts = map {
 598                 exists $known_snapshot_format_aliases{$_} ?
 599                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 600         @fmts = grep {
 601                 exists $known_snapshot_formats{$_} &&
 602                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 603 }
 604
 605 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 606 sub evaluate_gitweb_config {
 607         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 608         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 609         # die if there are errors parsing config file
 610         if (-e $GITWEB_CONFIG) {
 611                 do $GITWEB_CONFIG;
 612                 die $@ if $@;
 613         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 614                 do $GITWEB_CONFIG_SYSTEM;
 615                 die $@ if $@;
 616         }
 617 }
 618
 619 # Get loadavg of system, to compare against $maxload.
 620 # Currently it requires '/proc/loadavg' present to get loadavg;
 621 # if it is not present it returns 0, which means no load checking.
 622 sub get_loadavg {
 623         if( -e '/proc/loadavg' ){
 624                 open my $fd, '<', '/proc/loadavg'
 625                         or return 0;
 626                 my @load = split(/\s+/, scalar <$fd>);
 627                 close $fd;
 628
 629                 # The first three columns measure CPU and IO utilization of the last one,
 630                 # five, and 10 minute periods.  The fourth column shows the number of
 631                 # currently running processes and the total number of processes in the m/n
 632                 # format.  The last column displays the last process ID used.
 633                 return $load[0] || 0;
 634         }
 635         # additional checks for load average should go here for things that don't export
 636         # /proc/loadavg
 637
 638         return 0;
 639 }
 640
 641 # version of the core git binary
 642 our $git_version;
 643 sub evaluate_git_version {
 644         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 645         $number_of_git_cmds++;
 646 }
 647
 648 sub check_loadavg {
 649         if (defined $maxload && get_loadavg() > $maxload) {
 650                 die_error(503, "The load average on the server is too high");
 651         }
 652 }
 653
 654 # ======================================================================
 655 # input validation and dispatch
 656
 657 # input parameters can be collected from a variety of sources (presently, CGI
 658 # and PATH_INFO), so we define an %input_params hash that collects them all
 659 # together during validation: this allows subsequent uses (e.g. href()) to be
 660 # agnostic of the parameter origin
 661
 662 our %input_params = ();
 663
 664 # input parameters are stored with the long parameter name as key. This will
 665 # also be used in the href subroutine to convert parameters to their CGI
 666 # equivalent, and since the href() usage is the most frequent one, we store
 667 # the name -> CGI key mapping here, instead of the reverse.
 668 #
 669 # XXX: Warning: If you touch this, check the search form for updating,
 670 # too.
 671
 672 our @cgi_param_mapping = (
 673         project => "p",
 674         action => "a",
 675         file_name => "f",
 676         file_parent => "fp",
 677         hash => "h",
 678         hash_parent => "hp",
 679         hash_base => "hb",
 680         hash_parent_base => "hpb",
 681         page => "pg",
 682         order => "o",
 683         searchtext => "s",
 684         searchtype => "st",
 685         snapshot_format => "sf",
 686         extra_options => "opt",
 687         search_use_regexp => "sr",
 688         # this must be last entry (for manipulation from JavaScript)
 689         javascript => "js"
 690 );
 691 our %cgi_param_mapping = @cgi_param_mapping;
 692
 693 # we will also need to know the possible actions, for validation
 694 our %actions = (
 695         "blame" => \&git_blame,
 696         "blame_incremental" => \&git_blame_incremental,
 697         "blame_data" => \&git_blame_data,
 698         "blobdiff" => \&git_blobdiff,
 699         "blobdiff_plain" => \&git_blobdiff_plain,
 700         "blob" => \&git_blob,
 701         "blob_plain" => \&git_blob_plain,
 702         "commitdiff" => \&git_commitdiff,
 703         "commitdiff_plain" => \&git_commitdiff_plain,
 704         "commit" => \&git_commit,
 705         "forks" => \&git_forks,
 706         "heads" => \&git_heads,
 707         "history" => \&git_history,
 708         "log" => \&git_log,
 709         "patch" => \&git_patch,
 710         "patches" => \&git_patches,
 711         "rss" => \&git_rss,
 712         "atom" => \&git_atom,
 713         "search" => \&git_search,
 714         "search_help" => \&git_search_help,
 715         "shortlog" => \&git_shortlog,
 716         "summary" => \&git_summary,
 717         "tag" => \&git_tag,
 718         "tags" => \&git_tags,
 719         "tree" => \&git_tree,
 720         "snapshot" => \&git_snapshot,
 721         "object" => \&git_object,
 722         # those below don't need $project
 723         "opml" => \&git_opml,
 724         "project_list" => \&git_project_list,
 725         "project_index" => \&git_project_index,
 726 );
 727
 728 # finally, we have the hash of allowed extra_options for the commands that
 729 # allow them
 730 our %allowed_options = (
 731         "--no-merges" => [ qw(rss atom log shortlog history) ],
 732 );
 733
 734 # fill %input_params with the CGI parameters. All values except for 'opt'
 735 # should be single values, but opt can be an array. We should probably
 736 # build an array of parameters that can be multi-valued, but since for the time
 737 # being it's only this one, we just single it out
 738 sub evaluate_query_params {
 739         our $cgi;
 740
 741         while (my ($name, $symbol) = each %cgi_param_mapping) {
 742                 if ($symbol eq 'opt') {
 743                         $input_params{$name} = [ $cgi->param($symbol) ];
 744                 } else {
 745                         $input_params{$name} = $cgi->param($symbol);
 746                 }
 747         }
 748 }
 749
 750 # now read PATH_INFO and update the parameter list for missing parameters
 751 sub evaluate_path_info {
 752         return if defined $input_params{'project'};
 753         return if !$path_info;
 754         $path_info =~ s,^/+,,;
 755         return if !$path_info;
 756
 757         # find which part of PATH_INFO is project
 758         my $project = $path_info;
 759         $project =~ s,/+$,,;
 760         while ($project && !check_head_link("$projectroot/$project")) {
 761                 $project =~ s,/*[^/]*$,,;
 762         }
 763         return unless $project;
 764         $input_params{'project'} = $project;
 765
 766         # do not change any parameters if an action is given using the query string
 767         return if $input_params{'action'};
 768         $path_info =~ s,^\Q$project\E/*,,;
 769
 770         # next, check if we have an action
 771         my $action = $path_info;
 772         $action =~ s,/.*$,,;
 773         if (exists $actions{$action}) {
 774                 $path_info =~ s,^$action/*,,;
 775                 $input_params{'action'} = $action;
 776         }
 777
 778         # list of actions that want hash_base instead of hash, but can have no
 779         # pathname (f) parameter
 780         my @wants_base = (
 781                 'tree',
 782                 'history',
 783         );
 784
 785         # we want to catch
 786         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 787         my ($parentrefname, $parentpathname, $refname, $pathname) =
 788                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 789
 790         # first, analyze the 'current' part
 791         if (defined $pathname) {
 792                 # we got "branch:filename" or "branch:dir/"
 793                 # we could use git_get_type(branch:pathname), but:
 794                 # - it needs $git_dir
 795                 # - it does a git() call
 796                 # - the convention of terminating directories with a slash
 797                 #   makes it superfluous
 798                 # - embedding the action in the PATH_INFO would make it even
 799                 #   more superfluous
 800                 $pathname =~ s,^/+,,;
 801                 if (!$pathname || substr($pathname, -1) eq "/") {
 802                         $input_params{'action'} ||= "tree";
 803                         $pathname =~ s,/$,,;
 804                 } else {
 805                         # the default action depends on whether we had parent info
 806                         # or not
 807                         if ($parentrefname) {
 808                                 $input_params{'action'} ||= "blobdiff_plain";
 809                         } else {
 810                                 $input_params{'action'} ||= "blob_plain";
 811                         }
 812                 }
 813                 $input_params{'hash_base'} ||= $refname;
 814                 $input_params{'file_name'} ||= $pathname;
 815         } elsif (defined $refname) {
 816                 # we got "branch". In this case we have to choose if we have to
 817                 # set hash or hash_base.
 818                 #
 819                 # Most of the actions without a pathname only want hash to be
 820                 # set, except for the ones specified in @wants_base that want
 821                 # hash_base instead. It should also be noted that hand-crafted
 822                 # links having 'history' as an action and no pathname or hash
 823                 # set will fail, but that happens regardless of PATH_INFO.
 824                 $input_params{'action'} ||= "shortlog";
 825                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 826                         $input_params{'hash_base'} ||= $refname;
 827                 } else {
 828                         $input_params{'hash'} ||= $refname;
 829                 }
 830         }
 831
 832         # next, handle the 'parent' part, if present
 833         if (defined $parentrefname) {
 834                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 835                 # someproject/blobdiff/oldrev..newrev:/filename
 836                 if ($parentpathname) {
 837                         $parentpathname =~ s,^/+,,;
 838                         $parentpathname =~ s,/$,,;
 839                         $input_params{'file_parent'} ||= $parentpathname;
 840                 } else {
 841                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 842                 }
 843                 # we assume that hash_parent_base is wanted if a path was specified,
 844                 # or if the action wants hash_base instead of hash
 845                 if (defined $input_params{'file_parent'} ||
 846                         grep { $_ eq $input_params{'action'} } @wants_base) {
 847                         $input_params{'hash_parent_base'} ||= $parentrefname;
 848                 } else {
 849                         $input_params{'hash_parent'} ||= $parentrefname;
 850                 }
 851         }
 852
 853         # for the snapshot action, we allow URLs in the form
 854         # $project/snapshot/$hash.ext
 855         # where .ext determines the snapshot and gets removed from the
 856         # passed $refname to provide the $hash.
 857         #
 858         # To be able to tell that $refname includes the format extension, we
 859         # require the following two conditions to be satisfied:
 860         # - the hash input parameter MUST have been set from the $refname part
 861         #   of the URL (i.e. they must be equal)
 862         # - the snapshot format MUST NOT have been defined already (e.g. from
 863         #   CGI parameter sf)
 864         # It's also useless to try any matching unless $refname has a dot,
 865         # so we check for that too
 866         if (defined $input_params{'action'} &&
 867                 $input_params{'action'} eq 'snapshot' &&
 868                 defined $refname && index($refname, '.') != -1 &&
 869                 $refname eq $input_params{'hash'} &&
 870                 !defined $input_params{'snapshot_format'}) {
 871                 # We loop over the known snapshot formats, checking for
 872                 # extensions. Allowed extensions are both the defined suffix
 873                 # (which includes the initial dot already) and the snapshot
 874                 # format key itself, with a prepended dot
 875                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 876                         my $hash = $refname;
 877                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 878                                 next;
 879                         }
 880                         my $sfx = $1;
 881                         # a valid suffix was found, so set the snapshot format
 882                         # and reset the hash parameter
 883                         $input_params{'snapshot_format'} = $fmt;
 884                         $input_params{'hash'} = $hash;
 885                         # we also set the format suffix to the one requested
 886                         # in the URL: this way a request for e.g. .tgz returns
 887                         # a .tgz instead of a .tar.gz
 888                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 889                         last;
 890                 }
 891         }
 892 }
 893
 894 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 895      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 896      $searchtext, $search_regexp);
 897 sub evaluate_and_validate_params {
 898         our $action = $input_params{'action'};
 899         if (defined $action) {
 900                 if (!validate_action($action)) {
 901                         die_error(400, "Invalid action parameter");
 902                 }
 903         }
 904
 905         # parameters which are pathnames
 906         our $project = $input_params{'project'};
 907         if (defined $project) {
 908                 if (!validate_project($project)) {
 909                         undef $project;
 910                         die_error(404, "No such project");
 911                 }
 912         }
 913
 914         our $file_name = $input_params{'file_name'};
 915         if (defined $file_name) {
 916                 if (!validate_pathname($file_name)) {
 917                         die_error(400, "Invalid file parameter");
 918                 }
 919         }
 920
 921         our $file_parent = $input_params{'file_parent'};
 922         if (defined $file_parent) {
 923                 if (!validate_pathname($file_parent)) {
 924                         die_error(400, "Invalid file parent parameter");
 925                 }
 926         }
 927
 928         # parameters which are refnames
 929         our $hash = $input_params{'hash'};
 930         if (defined $hash) {
 931                 if (!validate_refname($hash)) {
 932                         die_error(400, "Invalid hash parameter");
 933                 }
 934         }
 935
 936         our $hash_parent = $input_params{'hash_parent'};
 937         if (defined $hash_parent) {
 938                 if (!validate_refname($hash_parent)) {
 939                         die_error(400, "Invalid hash parent parameter");
 940                 }
 941         }
 942
 943         our $hash_base = $input_params{'hash_base'};
 944         if (defined $hash_base) {
 945                 if (!validate_refname($hash_base)) {
 946                         die_error(400, "Invalid hash base parameter");
 947                 }
 948         }
 949
 950         our @extra_options = @{$input_params{'extra_options'}};
 951         # @extra_options is always defined, since it can only be (currently) set from
 952         # CGI, and $cgi->param() returns the empty array in array context if the param
 953         # is not set
 954         foreach my $opt (@extra_options) {
 955                 if (not exists $allowed_options{$opt}) {
 956                         die_error(400, "Invalid option parameter");
 957                 }
 958                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 959                         die_error(400, "Invalid option parameter for this action");
 960                 }
 961         }
 962
 963         our $hash_parent_base = $input_params{'hash_parent_base'};
 964         if (defined $hash_parent_base) {
 965                 if (!validate_refname($hash_parent_base)) {
 966                         die_error(400, "Invalid hash parent base parameter");
 967                 }
 968         }
 969
 970         # other parameters
 971         our $page = $input_params{'page'};
 972         if (defined $page) {
 973                 if ($page =~ m/[^0-9]/) {
 974                         die_error(400, "Invalid page parameter");
 975                 }
 976         }
 977
 978         our $searchtype = $input_params{'searchtype'};
 979         if (defined $searchtype) {
 980                 if ($searchtype =~ m/[^a-z]/) {
 981                         die_error(400, "Invalid searchtype parameter");
 982                 }
 983         }
 984
 985         our $search_use_regexp = $input_params{'search_use_regexp'};
 986
 987         our $searchtext = $input_params{'searchtext'};
 988         our $search_regexp;
 989         if (defined $searchtext) {
 990                 if (length($searchtext) < 2) {
 991                         die_error(403, "At least two characters are required for search parameter");
 992                 }
 993                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 994         }
 995 }
 996
 997 # path to the current git repository
 998 our $git_dir;
 999 sub evaluate_git_dir {
1000         our $git_dir = "$projectroot/$project" if $project;
1001 }
1002
1003 our (@snapshot_fmts, $git_avatar);
1004 sub configure_gitweb_features {
1005         # list of supported snapshot formats
1006         our @snapshot_fmts = gitweb_get_feature('snapshot');
1007         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1008
1009         # check that the avatar feature is set to a known provider name,
1010         # and for each provider check if the dependencies are satisfied.
1011         # if the provider name is invalid or the dependencies are not met,
1012         # reset $git_avatar to the empty string.
1013         our ($git_avatar) = gitweb_get_feature('avatar');
1014         if ($git_avatar eq 'gravatar') {
1015                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1016         } elsif ($git_avatar eq 'picon') {
1017                 # no dependencies
1018         } else {
1019                 $git_avatar = '';
1020         }
1021 }
1022
1023 # custom error handler: 'die <message>' is Internal Server Error
1024 sub handle_errors_html {
1025         my $msg = shift; # it is already HTML escaped
1026
1027         # to avoid infinite loop where error occurs in die_error,
1028         # change handler to default handler, disabling handle_errors_html
1029         set_message("Error occured when inside die_error:\n$msg");
1030
1031         # you cannot jump out of die_error when called as error handler;
1032         # the subroutine set via CGI::Carp::set_message is called _after_
1033         # HTTP headers are already written, so it cannot write them itself
1034         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1035 }
1036 set_message(\&handle_errors_html);
1037
1038 # dispatch
1039 sub dispatch {
1040         if (!defined $action) {
1041                 if (defined $hash) {
1042                         $action = git_get_type($hash);
1043                 } elsif (defined $hash_base && defined $file_name) {
1044                         $action = git_get_type("$hash_base:$file_name");
1045                 } elsif (defined $project) {
1046                         $action = 'summary';
1047                 } else {
1048                         $action = 'project_list';
1049                 }
1050         }
1051         if (!defined($actions{$action})) {
1052                 die_error(400, "Unknown action");
1053         }
1054         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1055             !$project) {
1056                 die_error(400, "Project needed");
1057         }
1058         $actions{$action}->();
1059 }
1060
1061 sub reset_timer {
1062         our $t0 = [Time::HiRes::gettimeofday()]
1063                 if defined $t0;
1064         our $number_of_git_cmds = 0;
1065 }
1066
1067 sub run_request {
1068         reset_timer();
1069
1070         evaluate_uri();
1071         evaluate_gitweb_config();
1072         evaluate_git_version();
1073         check_loadavg();
1074
1075         # $projectroot and $projects_list might be set in gitweb config file
1076         $projects_list ||= $projectroot;
1077
1078         evaluate_query_params();
1079         evaluate_path_info();
1080         evaluate_and_validate_params();
1081         evaluate_git_dir();
1082
1083         configure_gitweb_features();
1084
1085         dispatch();
1086 }
1087
1088 our $is_last_request = sub { 1 };
1089 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1090 our $CGI = 'CGI';
1091 our $cgi;
1092 sub configure_as_fcgi {
1093         require CGI::Fast;
1094         our $CGI = 'CGI::Fast';
1095
1096         my $request_number = 0;
1097         # let each child service 100 requests
1098         our $is_last_request = sub { ++$request_number > 100 };
1099 }
1100 sub evaluate_argv {
1101         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1102         configure_as_fcgi()
1103                 if $script_name =~ /\.fcgi$/;
1104
1105         return unless (@ARGV);
1106
1107         require Getopt::Long;
1108         Getopt::Long::GetOptions(
1109                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1110                 'nproc|n=i' => sub {
1111                         my ($arg, $val) = @_;
1112                         return unless eval { require FCGI::ProcManager; 1; };
1113                         my $proc_manager = FCGI::ProcManager->new({
1114                                 n_processes => $val,
1115                         });
1116                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1117                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1118                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1119                 },
1120         );
1121 }
1122
1123 sub run {
1124         evaluate_argv();
1125
1126         $pre_listen_hook->()
1127                 if $pre_listen_hook;
1128
1129  REQUEST:
1130         while ($cgi = $CGI->new()) {
1131                 $pre_dispatch_hook->()
1132                         if $pre_dispatch_hook;
1133
1134                 run_request();
1135
1136                 $post_dispatch_hook->()
1137                         if $post_dispatch_hook;
1138
1139                 last REQUEST if ($is_last_request->());
1140         }
1141
1142  DONE_GITWEB:
1143         1;
1144 }
1145
1146 run();
1147
1148 if (defined caller) {
1149         # wrapped in a subroutine processing requests,
1150         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1151         return;
1152 } else {
1153         # pure CGI script, serving single request
1154         exit;
1155 }
1156
1157 ## ======================================================================
1158 ## action links
1159
1160 # possible values of extra options
1161 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1162 # -replay => 1      - start from a current view (replay with modifications)
1163 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1164 sub href {
1165         my %params = @_;
1166         # default is to use -absolute url() i.e. $my_uri
1167         my $href = $params{-full} ? $my_url : $my_uri;
1168
1169         $params{'project'} = $project unless exists $params{'project'};
1170
1171         if ($params{-replay}) {
1172                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1173                         if (!exists $params{$name}) {
1174                                 $params{$name} = $input_params{$name};
1175                         }
1176                 }
1177         }
1178
1179         my $use_pathinfo = gitweb_check_feature('pathinfo');
1180         if (defined $params{'project'} &&
1181             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1182                 # try to put as many parameters as possible in PATH_INFO:
1183                 #   - project name
1184                 #   - action
1185                 #   - hash_parent or hash_parent_base:/file_parent
1186                 #   - hash or hash_base:/filename
1187                 #   - the snapshot_format as an appropriate suffix
1188
1189                 # When the script is the root DirectoryIndex for the domain,
1190                 # $href here would be something like http://gitweb.example.com/
1191                 # Thus, we strip any trailing / from $href, to spare us double
1192                 # slashes in the final URL
1193                 $href =~ s,/$,,;
1194
1195                 # Then add the project name, if present
1196                 $href .= "/".esc_url($params{'project'});
1197                 delete $params{'project'};
1198
1199                 # since we destructively absorb parameters, we keep this
1200                 # boolean that remembers if we're handling a snapshot
1201                 my $is_snapshot = $params{'action'} eq 'snapshot';
1202
1203                 # Summary just uses the project path URL, any other action is
1204                 # added to the URL
1205                 if (defined $params{'action'}) {
1206                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1207                         delete $params{'action'};
1208                 }
1209
1210                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1211                 # stripping nonexistent or useless pieces
1212                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1213                         || $params{'hash_parent'} || $params{'hash'});
1214                 if (defined $params{'hash_base'}) {
1215                         if (defined $params{'hash_parent_base'}) {
1216                                 $href .= esc_url($params{'hash_parent_base'});
1217                                 # skip the file_parent if it's the same as the file_name
1218                                 if (defined $params{'file_parent'}) {
1219                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1220                                                 delete $params{'file_parent'};
1221                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1222                                                 $href .= ":/".esc_url($params{'file_parent'});
1223                                                 delete $params{'file_parent'};
1224                                         }
1225                                 }
1226                                 $href .= "..";
1227                                 delete $params{'hash_parent'};
1228                                 delete $params{'hash_parent_base'};
1229                         } elsif (defined $params{'hash_parent'}) {
1230                                 $href .= esc_url($params{'hash_parent'}). "..";
1231                                 delete $params{'hash_parent'};
1232                         }
1233
1234                         $href .= esc_url($params{'hash_base'});
1235                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1236                                 $href .= ":/".esc_url($params{'file_name'});
1237                                 delete $params{'file_name'};
1238                         }
1239                         delete $params{'hash'};
1240                         delete $params{'hash_base'};
1241                 } elsif (defined $params{'hash'}) {
1242                         $href .= esc_url($params{'hash'});
1243                         delete $params{'hash'};
1244                 }
1245
1246                 # If the action was a snapshot, we can absorb the
1247                 # snapshot_format parameter too
1248                 if ($is_snapshot) {
1249                         my $fmt = $params{'snapshot_format'};
1250                         # snapshot_format should always be defined when href()
1251                         # is called, but just in case some code forgets, we
1252                         # fall back to the default
1253                         $fmt ||= $snapshot_fmts[0];
1254                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1255                         delete $params{'snapshot_format'};
1256                 }
1257         }
1258
1259         # now encode the parameters explicitly
1260         my @result = ();
1261         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1262                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1263                 if (defined $params{$name}) {
1264                         if (ref($params{$name}) eq "ARRAY") {
1265                                 foreach my $par (@{$params{$name}}) {
1266                                         push @result, $symbol . "=" . esc_param($par);
1267                                 }
1268                         } else {
1269                                 push @result, $symbol . "=" . esc_param($params{$name});
1270                         }
1271                 }
1272         }
1273         $href .= "?" . join(';', @result) if scalar @result;
1274
1275         return $href;
1276 }
1277
1278
1279 ## ======================================================================
1280 ## validation, quoting/unquoting and escaping
1281
1282 sub validate_action {
1283         my $input = shift || return undef;
1284         return undef unless exists $actions{$input};
1285         return $input;
1286 }
1287
1288 sub validate_project {
1289         my $input = shift || return undef;
1290         if (!validate_pathname($input) ||
1291                 !(-d "$projectroot/$input") ||
1292                 !check_export_ok("$projectroot/$input") ||
1293                 ($strict_export && !project_in_list($input))) {
1294                 return undef;
1295         } else {
1296                 return $input;
1297         }
1298 }
1299
1300 sub validate_pathname {
1301         my $input = shift || return undef;
1302
1303         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1304         # at the beginning, at the end, and between slashes.
1305         # also this catches doubled slashes
1306         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1307                 return undef;
1308         }
1309         # no null characters
1310         if ($input =~ m!\0!) {
1311                 return undef;
1312         }
1313         return $input;
1314 }
1315
1316 sub validate_refname {
1317         my $input = shift || return undef;
1318
1319         # textual hashes are O.K.
1320         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1321                 return $input;
1322         }
1323         # it must be correct pathname
1324         $input = validate_pathname($input)
1325                 or return undef;
1326         # restrictions on ref name according to git-check-ref-format
1327         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1328                 return undef;
1329         }
1330         return $input;
1331 }
1332
1333 # decode sequences of octets in utf8 into Perl's internal form,
1334 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1335 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1336 sub to_utf8 {
1337         my $str = shift;
1338         return undef unless defined $str;
1339         if (utf8::valid($str)) {
1340                 utf8::decode($str);
1341                 return $str;
1342         } else {
1343                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1344         }
1345 }
1346
1347 # quote unsafe chars, but keep the slash, even when it's not
1348 # correct, but quoted slashes look too horrible in bookmarks
1349 sub esc_param {
1350         my $str = shift;
1351         return undef unless defined $str;
1352         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1353         $str =~ s/ /\+/g;
1354         return $str;
1355 }
1356
1357 # quote unsafe chars in whole URL, so some characters cannot be quoted
1358 sub esc_url {
1359         my $str = shift;
1360         return undef unless defined $str;
1361         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1362         $str =~ s/ /\+/g;
1363         return $str;
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                         $markers .= " <span class=\"$class\" title=\"$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=\"$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 %$cloud;
2565                 return '<p align="center">' . join (', ', map {
2566                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
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", $hash)." | ".
3371                   quote_command($highlight_bin).
3372                   " --xhtml --fragment --syntax $syntax |"
3373                 or die_error(500, "Couldn't open file or run syntax highlighter");
3374         return $fd;
3375 }
3376
3377 ## ======================================================================
3378 ## functions printing HTML: header, footer, error page
3379
3380 sub get_page_title {
3381         my $title = to_utf8($site_name);
3382
3383         return $title unless (defined $project);
3384         $title .= " - " . to_utf8($project);
3385
3386         return $title unless (defined $action);
3387         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3388
3389         return $title unless (defined $file_name);
3390         $title .= " - " . esc_path($file_name);
3391         if ($action eq "tree" && $file_name !~ m|/$|) {
3392                 $title .= "/";
3393         }
3394
3395         return $title;
3396 }
3397
3398 sub git_header_html {
3399         my $status = shift || "200 OK";
3400         my $expires = shift;
3401         my %opts = @_;
3402
3403         my $title = get_page_title();
3404         my $content_type;
3405         # require explicit support from the UA if we are to send the page as
3406         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3407         # we have to do this because MSIE sometimes globs '*/*', pretending to
3408         # support xhtml+xml but choking when it gets what it asked for.
3409         if (defined $cgi->http('HTTP_ACCEPT') &&
3410             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3411             $cgi->Accept('application/xhtml+xml') != 0) {
3412                 $content_type = 'application/xhtml+xml';
3413         } else {
3414                 $content_type = 'text/html';
3415         }
3416         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3417                            -status=> $status, -expires => $expires)
3418                 unless ($opts{'-no_http_header'});
3419         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3420         print <<EOF;
3421 <?xml version="1.0" encoding="utf-8"?>
3422 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3423 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3424 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3425 <!-- git core binaries version $git_version -->
3426 <head>
3427 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3428 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3429 <meta name="robots" content="index, nofollow"/>
3430 <title>$title</title>
3431 EOF
3432         # the stylesheet, favicon etc urls won't work correctly with path_info
3433         # unless we set the appropriate base URL
3434         if ($ENV{'PATH_INFO'}) {
3435                 print "<base href=\"".esc_url($base_url)."\" />\n";
3436         }
3437         # print out each stylesheet that exist, providing backwards capability
3438         # for those people who defined $stylesheet in a config file
3439         if (defined $stylesheet) {
3440                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3441         } else {
3442                 foreach my $stylesheet (@stylesheets) {
3443                         next unless $stylesheet;
3444                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3445                 }
3446         }
3447         if (defined $project) {
3448                 my %href_params = get_feed_info();
3449                 if (!exists $href_params{'-title'}) {
3450                         $href_params{'-title'} = 'log';
3451                 }
3452
3453                 foreach my $format qw(RSS Atom) {
3454                         my $type = lc($format);
3455                         my %link_attr = (
3456                                 '-rel' => 'alternate',
3457                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3458                                 '-type' => "application/$type+xml"
3459                         );
3460
3461                         $href_params{'action'} = $type;
3462                         $link_attr{'-href'} = href(%href_params);
3463                         print "<link ".
3464                               "rel=\"$link_attr{'-rel'}\" ".
3465                               "title=\"$link_attr{'-title'}\" ".
3466                               "href=\"$link_attr{'-href'}\" ".
3467                               "type=\"$link_attr{'-type'}\" ".
3468                               "/>\n";
3469
3470                         $href_params{'extra_options'} = '--no-merges';
3471                         $link_attr{'-href'} = href(%href_params);
3472                         $link_attr{'-title'} .= ' (no merges)';
3473                         print "<link ".
3474                               "rel=\"$link_attr{'-rel'}\" ".
3475                               "title=\"$link_attr{'-title'}\" ".
3476                               "href=\"$link_attr{'-href'}\" ".
3477                               "type=\"$link_attr{'-type'}\" ".
3478                               "/>\n";
3479                 }
3480
3481         } else {
3482                 printf('<link rel="alternate" title="%s projects list" '.
3483                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3484                        $site_name, href(project=>undef, action=>"project_index"));
3485                 printf('<link rel="alternate" title="%s projects feeds" '.
3486                        'href="%s" type="text/x-opml" />'."\n",
3487                        $site_name, href(project=>undef, action=>"opml"));
3488         }
3489         if (defined $favicon) {
3490                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3491         }
3492
3493         print "</head>\n" .
3494               "<body>\n";
3495
3496         if (defined $site_header && -f $site_header) {
3497                 insert_file($site_header);
3498         }
3499
3500         print "<div class=\"page_header\">\n" .
3501               $cgi->a({-href => esc_url($logo_url),
3502                        -title => $logo_label},
3503                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3504         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3505         if (defined $project) {
3506                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3507                 if (defined $action) {
3508                         print " / $action";
3509                 }
3510                 print "\n";
3511         }
3512         print "</div>\n";
3513
3514         my $have_search = gitweb_check_feature('search');
3515         if (defined $project && $have_search) {
3516                 if (!defined $searchtext) {
3517                         $searchtext = "";
3518                 }
3519                 my $search_hash;
3520                 if (defined $hash_base) {
3521                         $search_hash = $hash_base;
3522                 } elsif (defined $hash) {
3523                         $search_hash = $hash;
3524                 } else {
3525                         $search_hash = "HEAD";
3526                 }
3527                 my $action = $my_uri;
3528                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3529                 if ($use_pathinfo) {
3530                         $action .= "/".esc_url($project);
3531                 }
3532                 print $cgi->startform(-method => "get", -action => $action) .
3533                       "<div class=\"search\">\n" .
3534                       (!$use_pathinfo &&
3535                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3536                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3537                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3538                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3539                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3540                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3541                       " search:\n",
3542                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3543                       "<span title=\"Extended regular expression\">" .
3544                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3545                                      -checked => $search_use_regexp) .
3546                       "</span>" .
3547                       "</div>" .
3548                       $cgi->end_form() . "\n";
3549         }
3550 }
3551
3552 sub git_footer_html {
3553         my $feed_class = 'rss_logo';
3554
3555         print "<div class=\"page_footer\">\n";
3556         if (defined $project) {
3557                 my $descr = git_get_project_description($project);
3558                 if (defined $descr) {
3559                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3560                 }
3561
3562                 my %href_params = get_feed_info();
3563                 if (!%href_params) {
3564                         $feed_class .= ' generic';
3565                 }
3566                 $href_params{'-title'} ||= 'log';
3567
3568                 foreach my $format qw(RSS Atom) {
3569                         $href_params{'action'} = lc($format);
3570                         print $cgi->a({-href => href(%href_params),
3571                                       -title => "$href_params{'-title'} $format feed",
3572                                       -class => $feed_class}, $format)."\n";
3573                 }
3574
3575         } else {
3576                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3577                               -class => $feed_class}, "OPML") . " ";
3578                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3579                               -class => $feed_class}, "TXT") . "\n";
3580         }
3581         print "</div>\n"; # class="page_footer"
3582
3583         if (defined $t0 && gitweb_check_feature('timed')) {
3584                 print "<div id=\"generating_info\">\n";
3585                 print 'This page took '.
3586                       '<span id="generating_time" class="time_span">'.
3587                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3588                       ' seconds </span>'.
3589                       ' and '.
3590                       '<span id="generating_cmd">'.
3591                       $number_of_git_cmds.
3592                       '</span> git commands '.
3593                       " to generate.\n";
3594                 print "</div>\n"; # class="page_footer"
3595         }
3596
3597         if (defined $site_footer && -f $site_footer) {
3598                 insert_file($site_footer);
3599         }
3600
3601         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3602         if (defined $action &&
3603             $action eq 'blame_incremental') {
3604                 print qq!<script type="text/javascript">\n!.
3605                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3606                       qq!           "!. href() .qq!");\n!.
3607                       qq!</script>\n!;
3608         } elsif (gitweb_check_feature('javascript-actions')) {
3609                 print qq!<script type="text/javascript">\n!.
3610                       qq!window.onload = fixLinks;\n!.
3611                       qq!</script>\n!;
3612         }
3613
3614         print "</body>\n" .
3615               "</html>";
3616 }
3617
3618 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3619 # Example: die_error(404, 'Hash not found')
3620 # By convention, use the following status codes (as defined in RFC 2616):
3621 # 400: Invalid or missing CGI parameters, or
3622 #      requested object exists but has wrong type.
3623 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3624 #      this server or project.
3625 # 404: Requested object/revision/project doesn't exist.
3626 # 500: The server isn't configured properly, or
3627 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3628 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3629 # 503: The server is currently unavailable (because it is overloaded,
3630 #      or down for maintenance).  Generally, this is a temporary state.
3631 sub die_error {
3632         my $status = shift || 500;
3633         my $error = esc_html(shift) || "Internal Server Error";
3634         my $extra = shift;
3635         my %opts = @_;
3636
3637         my %http_responses = (
3638                 400 => '400 Bad Request',
3639                 403 => '403 Forbidden',
3640                 404 => '404 Not Found',
3641                 500 => '500 Internal Server Error',
3642                 503 => '503 Service Unavailable',
3643         );
3644         git_header_html($http_responses{$status}, undef, %opts);
3645         print <<EOF;
3646 <div class="page_body">
3647 <br /><br />
3648 $status - $error
3649 <br />
3650 EOF
3651         if (defined $extra) {
3652                 print "<hr />\n" .
3653                       "$extra\n";
3654         }
3655         print "</div>\n";
3656
3657         git_footer_html();
3658         goto DONE_GITWEB
3659                 unless ($opts{'-error_handler'});
3660 }
3661
3662 ## ----------------------------------------------------------------------
3663 ## functions printing or outputting HTML: navigation
3664
3665 sub git_print_page_nav {
3666         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3667         $extra = '' if !defined $extra; # pager or formats
3668
3669         my @navs = qw(summary shortlog log commit commitdiff tree);
3670         if ($suppress) {
3671                 @navs = grep { $_ ne $suppress } @navs;
3672         }
3673
3674         my %arg = map { $_ => {action=>$_} } @navs;
3675         if (defined $head) {
3676                 for (qw(commit commitdiff)) {
3677                         $arg{$_}{'hash'} = $head;
3678                 }
3679                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3680                         for (qw(shortlog log)) {
3681                                 $arg{$_}{'hash'} = $head;
3682                         }
3683                 }
3684         }
3685
3686         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3687         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3688
3689         my @actions = gitweb_get_feature('actions');
3690         my %repl = (
3691                 '%' => '%',
3692                 'n' => $project,         # project name
3693                 'f' => $git_dir,         # project path within filesystem
3694                 'h' => $treehead || '',  # current hash ('h' parameter)
3695                 'b' => $treebase || '',  # hash base ('hb' parameter)
3696         );
3697         while (@actions) {
3698                 my ($label, $link, $pos) = splice(@actions,0,3);
3699                 # insert
3700                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3701                 # munch munch
3702                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3703                 $arg{$label}{'_href'} = $link;
3704         }
3705
3706         print "<div class=\"page_nav\">\n" .
3707                 (join " | ",
3708                  map { $_ eq $current ?
3709                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3710                  } @navs);
3711         print "<br/>\n$extra<br/>\n" .
3712               "</div>\n";
3713 }
3714
3715 sub format_paging_nav {
3716         my ($action, $page, $has_next_link) = @_;
3717         my $paging_nav;
3718
3719
3720         if ($page > 0) {
3721                 $paging_nav .=
3722                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3723                         " &sdot; " .
3724                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3725                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3726         } else {
3727                 $paging_nav .= "first &sdot; prev";
3728         }
3729
3730         if ($has_next_link) {
3731                 $paging_nav .= " &sdot; " .
3732                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3733                                  -accesskey => "n", -title => "Alt-n"}, "next");
3734         } else {
3735                 $paging_nav .= " &sdot; next";
3736         }
3737
3738         return $paging_nav;
3739 }
3740
3741 ## ......................................................................
3742 ## functions printing or outputting HTML: div
3743
3744 sub git_print_header_div {
3745         my ($action, $title, $hash, $hash_base) = @_;
3746         my %args = ();
3747
3748         $args{'action'} = $action;
3749         $args{'hash'} = $hash if $hash;
3750         $args{'hash_base'} = $hash_base if $hash_base;
3751
3752         print "<div class=\"header\">\n" .
3753               $cgi->a({-href => href(%args), -class => "title"},
3754               $title ? $title : $action) .
3755               "\n</div>\n";
3756 }
3757
3758 sub print_local_time {
3759         print format_local_time(@_);
3760 }
3761
3762 sub format_local_time {
3763         my $localtime = '';
3764         my %date = @_;
3765         if ($date{'hour_local'} < 6) {
3766                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3767                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3768         } else {
3769                 $localtime .= sprintf(" (%02d:%02d %s)",
3770                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3771         }
3772
3773         return $localtime;
3774 }
3775
3776 # Outputs the author name and date in long form
3777 sub git_print_authorship {
3778         my $co = shift;
3779         my %opts = @_;
3780         my $tag = $opts{-tag} || 'div';
3781         my $author = $co->{'author_name'};
3782
3783         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3784         print "<$tag class=\"author_date\">" .
3785               format_search_author($author, "author", esc_html($author)) .
3786               " [$ad{'rfc2822'}";
3787         print_local_time(%ad) if ($opts{-localtime});
3788         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3789                   . "</$tag>\n";
3790 }
3791
3792 # Outputs table rows containing the full author or committer information,
3793 # in the format expected for 'commit' view (& similar).
3794 # Parameters are a commit hash reference, followed by the list of people
3795 # to output information for. If the list is empty it defaults to both
3796 # author and committer.
3797 sub git_print_authorship_rows {
3798         my $co = shift;
3799         # too bad we can't use @people = @_ || ('author', 'committer')
3800         my @people = @_;
3801         @people = ('author', 'committer') unless @people;
3802         foreach my $who (@people) {
3803                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3804                 print "<tr><td>$who</td><td>" .
3805                       format_search_author($co->{"${who}_name"}, $who,
3806                                esc_html($co->{"${who}_name"})) . " " .
3807                       format_search_author($co->{"${who}_email"}, $who,
3808                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3809                       "</td><td rowspan=\"2\">" .
3810                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3811                       "</td></tr>\n" .
3812                       "<tr>" .
3813                       "<td></td><td> $wd{'rfc2822'}";
3814                 print_local_time(%wd);
3815                 print "</td>" .
3816                       "</tr>\n";
3817         }
3818 }
3819
3820 sub git_print_page_path {
3821         my $name = shift;
3822         my $type = shift;
3823         my $hb = shift;
3824
3825
3826         print "<div class=\"page_path\">";
3827         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3828                       -title => 'tree root'}, to_utf8("[$project]"));
3829         print " / ";
3830         if (defined $name) {
3831                 my @dirname = split '/', $name;
3832                 my $basename = pop @dirname;
3833                 my $fullname = '';
3834
3835                 foreach my $dir (@dirname) {
3836                         $fullname .= ($fullname ? '/' : '') . $dir;
3837                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3838                                                      hash_base=>$hb),
3839                                       -title => $fullname}, esc_path($dir));
3840                         print " / ";
3841                 }
3842                 if (defined $type && $type eq 'blob') {
3843                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3844                                                      hash_base=>$hb),
3845                                       -title => $name}, esc_path($basename));
3846                 } elsif (defined $type && $type eq 'tree') {
3847                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3848                                                      hash_base=>$hb),
3849                                       -title => $name}, esc_path($basename));
3850                         print " / ";
3851                 } else {
3852                         print esc_path($basename);
3853                 }
3854         }
3855         print "<br/></div>\n";
3856 }
3857
3858 sub git_print_log {
3859         my $log = shift;
3860         my %opts = @_;
3861
3862         if ($opts{'-remove_title'}) {
3863                 # remove title, i.e. first line of log
3864                 shift @$log;
3865         }
3866         # remove leading empty lines
3867         while (defined $log->[0] && $log->[0] eq "") {
3868                 shift @$log;
3869         }
3870
3871         # print log
3872         my $signoff = 0;
3873         my $empty = 0;
3874         foreach my $line (@$log) {
3875                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3876                         $signoff = 1;
3877                         $empty = 0;
3878                         if (! $opts{'-remove_signoff'}) {
3879                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3880                                 next;
3881                         } else {
3882                                 # remove signoff lines
3883                                 next;
3884                         }
3885                 } else {
3886                         $signoff = 0;
3887                 }
3888
3889                 # print only one empty line
3890                 # do not print empty line after signoff
3891                 if ($line eq "") {
3892                         next if ($empty || $signoff);
3893                         $empty = 1;
3894                 } else {
3895                         $empty = 0;
3896                 }
3897
3898                 print format_log_line_html($line) . "<br/>\n";
3899         }
3900
3901         if ($opts{'-final_empty_line'}) {
3902                 # end with single empty line
3903                 print "<br/>\n" unless $empty;
3904         }
3905 }
3906
3907 # return link target (what link points to)
3908 sub git_get_link_target {
3909         my $hash = shift;
3910         my $link_target;
3911
3912         # read link
3913         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3914                 or return;
3915         {
3916                 local $/ = undef;
3917                 $link_target = <$fd>;
3918         }
3919         close $fd
3920                 or return;
3921
3922         return $link_target;
3923 }
3924
3925 # given link target, and the directory (basedir) the link is in,
3926 # return target of link relative to top directory (top tree);
3927 # return undef if it is not possible (including absolute links).
3928 sub normalize_link_target {
3929         my ($link_target, $basedir) = @_;
3930
3931         # absolute symlinks (beginning with '/') cannot be normalized
3932         return if (substr($link_target, 0, 1) eq '/');
3933
3934         # normalize link target to path from top (root) tree (dir)
3935         my $path;
3936         if ($basedir) {
3937                 $path = $basedir . '/' . $link_target;
3938         } else {
3939                 # we are in top (root) tree (dir)
3940                 $path = $link_target;
3941         }
3942
3943         # remove //, /./, and /../
3944         my @path_parts;
3945         foreach my $part (split('/', $path)) {
3946                 # discard '.' and ''
3947                 next if (!$part || $part eq '.');
3948                 # handle '..'
3949                 if ($part eq '..') {
3950                         if (@path_parts) {
3951                                 pop @path_parts;
3952                         } else {
3953                                 # link leads outside repository (outside top dir)
3954                                 return;
3955                         }
3956                 } else {
3957                         push @path_parts, $part;
3958                 }
3959         }
3960         $path = join('/', @path_parts);
3961
3962         return $path;
3963 }
3964
3965 # print tree entry (row of git_tree), but without encompassing <tr> element
3966 sub git_print_tree_entry {
3967         my ($t, $basedir, $hash_base, $have_blame) = @_;
3968
3969         my %base_key = ();
3970         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3971
3972         # The format of a table row is: mode list link.  Where mode is
3973         # the mode of the entry, list is the name of the entry, an href,
3974         # and link is the action links of the entry.
3975
3976         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3977         if (exists $t->{'size'}) {
3978                 print "<td class=\"size\">$t->{'size'}</td>\n";
3979         }
3980         if ($t->{'type'} eq "blob") {
3981                 print "<td class=\"list\">" .
3982                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3983                                                file_name=>"$basedir$t->{'name'}", %base_key),
3984                                 -class => "list"}, esc_path($t->{'name'}));
3985                 if (S_ISLNK(oct $t->{'mode'})) {
3986                         my $link_target = git_get_link_target($t->{'hash'});
3987                         if ($link_target) {
3988                                 my $norm_target = normalize_link_target($link_target, $basedir);
3989                                 if (defined $norm_target) {
3990                                         print " -> " .
3991                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3992                                                                      file_name=>$norm_target),
3993                                                        -title => $norm_target}, esc_path($link_target));
3994                                 } else {
3995                                         print " -> " . esc_path($link_target);
3996                                 }
3997                         }
3998                 }
3999                 print "</td>\n";
4000                 print "<td class=\"link\">";
4001                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4002                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4003                               "blob");
4004                 if ($have_blame) {
4005                         print " | " .
4006                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4007                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4008                                       "blame");
4009                 }
4010                 if (defined $hash_base) {
4011                         print " | " .
4012                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4013                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4014                                       "history");
4015                 }
4016                 print " | " .
4017                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4018                                                file_name=>"$basedir$t->{'name'}")},
4019                                 "raw");
4020                 print "</td>\n";
4021
4022         } elsif ($t->{'type'} eq "tree") {
4023                 print "<td class=\"list\">";
4024                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4025                                              file_name=>"$basedir$t->{'name'}",
4026                                              %base_key)},
4027                               esc_path($t->{'name'}));
4028                 print "</td>\n";
4029                 print "<td class=\"link\">";
4030                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4031                                              file_name=>"$basedir$t->{'name'}",
4032                                              %base_key)},
4033                               "tree");
4034                 if (defined $hash_base) {
4035                         print " | " .
4036                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4037                                                      file_name=>"$basedir$t->{'name'}")},
4038                                       "history");
4039                 }
4040                 print "</td>\n";
4041         } else {
4042                 # unknown object: we can only present history for it
4043                 # (this includes 'commit' object, i.e. submodule support)
4044                 print "<td class=\"list\">" .
4045                       esc_path($t->{'name'}) .
4046                       "</td>\n";
4047                 print "<td class=\"link\">";
4048                 if (defined $hash_base) {
4049                         print $cgi->a({-href => href(action=>"history",
4050                                                      hash_base=>$hash_base,
4051                                                      file_name=>"$basedir$t->{'name'}")},
4052                                       "history");
4053                 }
4054                 print "</td>\n";
4055         }
4056 }
4057
4058 ## ......................................................................
4059 ## functions printing large fragments of HTML
4060
4061 # get pre-image filenames for merge (combined) diff
4062 sub fill_from_file_info {
4063         my ($diff, @parents) = @_;
4064
4065         $diff->{'from_file'} = [ ];
4066         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4067         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4068                 if ($diff->{'status'}[$i] eq 'R' ||
4069                     $diff->{'status'}[$i] eq 'C') {
4070                         $diff->{'from_file'}[$i] =
4071                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4072                 }
4073         }
4074
4075         return $diff;
4076 }
4077
4078 # is current raw difftree line of file deletion
4079 sub is_deleted {
4080         my $diffinfo = shift;
4081
4082         return $diffinfo->{'to_id'} eq ('0' x 40);
4083 }
4084
4085 # does patch correspond to [previous] difftree raw line
4086 # $diffinfo  - hashref of parsed raw diff format
4087 # $patchinfo - hashref of parsed patch diff format
4088 #              (the same keys as in $diffinfo)
4089 sub is_patch_split {
4090         my ($diffinfo, $patchinfo) = @_;
4091
4092         return defined $diffinfo && defined $patchinfo
4093                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4094 }
4095
4096
4097 sub git_difftree_body {
4098         my ($difftree, $hash, @parents) = @_;
4099         my ($parent) = $parents[0];
4100         my $have_blame = gitweb_check_feature('blame');
4101         print "<div class=\"list_head\">\n";
4102         if ($#{$difftree} > 10) {
4103                 print(($#{$difftree} + 1) . " files changed:\n");
4104         }
4105         print "</div>\n";
4106
4107         print "<table class=\"" .
4108               (@parents > 1 ? "combined " : "") .
4109               "diff_tree\">\n";
4110
4111         # header only for combined diff in 'commitdiff' view
4112         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4113         if ($has_header) {
4114                 # table header
4115                 print "<thead><tr>\n" .
4116                        "<th></th><th></th>\n"; # filename, patchN link
4117                 for (my $i = 0; $i < @parents; $i++) {
4118                         my $par = $parents[$i];
4119                         print "<th>" .
4120                               $cgi->a({-href => href(action=>"commitdiff",
4121                                                      hash=>$hash, hash_parent=>$par),
4122                                        -title => 'commitdiff to parent number ' .
4123                                                   ($i+1) . ': ' . substr($par,0,7)},
4124                                       $i+1) .
4125                               "&nbsp;</th>\n";
4126                 }
4127                 print "</tr></thead>\n<tbody>\n";
4128         }
4129
4130         my $alternate = 1;
4131         my $patchno = 0;
4132         foreach my $line (@{$difftree}) {
4133                 my $diff = parsed_difftree_line($line);
4134
4135                 if ($alternate) {
4136                         print "<tr class=\"dark\">\n";
4137                 } else {
4138                         print "<tr class=\"light\">\n";
4139                 }
4140                 $alternate ^= 1;
4141
4142                 if (exists $diff->{'nparents'}) { # combined diff
4143
4144                         fill_from_file_info($diff, @parents)
4145                                 unless exists $diff->{'from_file'};
4146
4147                         if (!is_deleted($diff)) {
4148                                 # file exists in the result (child) commit
4149                                 print "<td>" .
4150                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4151                                                              file_name=>$diff->{'to_file'},
4152                                                              hash_base=>$hash),
4153                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4154                                       "</td>\n";
4155                         } else {
4156                                 print "<td>" .
4157                                       esc_path($diff->{'to_file'}) .
4158                                       "</td>\n";
4159                         }
4160
4161                         if ($action eq 'commitdiff') {
4162                                 # link to patch
4163                                 $patchno++;
4164                                 print "<td class=\"link\">" .
4165                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4166                                       " | " .
4167                                       "</td>\n";
4168                         }
4169
4170                         my $has_history = 0;
4171                         my $not_deleted = 0;
4172                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4173                                 my $hash_parent = $parents[$i];
4174                                 my $from_hash = $diff->{'from_id'}[$i];
4175                                 my $from_path = $diff->{'from_file'}[$i];
4176                                 my $status = $diff->{'status'}[$i];
4177
4178                                 $has_history ||= ($status ne 'A');
4179                                 $not_deleted ||= ($status ne 'D');
4180
4181                                 if ($status eq 'A') {
4182                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4183                                 } elsif ($status eq 'D') {
4184                                         print "<td class=\"link\">" .
4185                                               $cgi->a({-href => href(action=>"blob",
4186                                                                      hash_base=>$hash,
4187                                                                      hash=>$from_hash,
4188                                                                      file_name=>$from_path)},
4189                                                       "blob" . ($i+1)) .
4190                                               " | </td>\n";
4191                                 } else {
4192                                         if ($diff->{'to_id'} eq $from_hash) {
4193                                                 print "<td class=\"link nochange\">";
4194                                         } else {
4195                                                 print "<td class=\"link\">";
4196                                         }
4197                                         print $cgi->a({-href => href(action=>"blobdiff",
4198                                                                      hash=>$diff->{'to_id'},
4199                                                                      hash_parent=>$from_hash,
4200                                                                      hash_base=>$hash,
4201                                                                      hash_parent_base=>$hash_parent,
4202                                                                      file_name=>$diff->{'to_file'},
4203                                                                      file_parent=>$from_path)},
4204                                                       "diff" . ($i+1)) .
4205                                               " | </td>\n";
4206                                 }
4207                         }
4208
4209                         print "<td class=\"link\">";
4210                         if ($not_deleted) {
4211                                 print $cgi->a({-href => href(action=>"blob",
4212                                                              hash=>$diff->{'to_id'},
4213                                                              file_name=>$diff->{'to_file'},
4214                                                              hash_base=>$hash)},
4215                                               "blob");
4216                                 print " | " if ($has_history);
4217                         }
4218                         if ($has_history) {
4219                                 print $cgi->a({-href => href(action=>"history",
4220                                                              file_name=>$diff->{'to_file'},
4221                                                              hash_base=>$hash)},
4222                                               "history");
4223                         }
4224                         print "</td>\n";
4225
4226                         print "</tr>\n";
4227                         next; # instead of 'else' clause, to avoid extra indent
4228                 }
4229                 # else ordinary diff
4230
4231                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4232                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4233                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4234                         $to_mode_oct = oct $diff->{'to_mode'};
4235                         if (S_ISREG($to_mode_oct)) { # only for regular file
4236                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4237                         }
4238                         $to_file_type = file_type($diff->{'to_mode'});
4239                 }
4240                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4241                         $from_mode_oct = oct $diff->{'from_mode'};
4242                         if (S_ISREG($to_mode_oct)) { # only for regular file
4243                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4244                         }
4245                         $from_file_type = file_type($diff->{'from_mode'});
4246                 }
4247
4248                 if ($diff->{'status'} eq "A") { # created
4249                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4250                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4251                         $mode_chng   .= "]</span>";
4252                         print "<td>";
4253                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4254                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4255                                       -class => "list"}, esc_path($diff->{'file'}));
4256                         print "</td>\n";
4257                         print "<td>$mode_chng</td>\n";
4258                         print "<td class=\"link\">";
4259                         if ($action eq 'commitdiff') {
4260                                 # link to patch
4261                                 $patchno++;
4262                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4263                                 print " | ";
4264                         }
4265                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4266                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4267                                       "blob");
4268                         print "</td>\n";
4269
4270                 } elsif ($diff->{'status'} eq "D") { # deleted
4271                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4272                         print "<td>";
4273                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4274                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4275                                        -class => "list"}, esc_path($diff->{'file'}));
4276                         print "</td>\n";
4277                         print "<td>$mode_chng</td>\n";
4278                         print "<td class=\"link\">";
4279                         if ($action eq 'commitdiff') {
4280                                 # link to patch
4281                                 $patchno++;
4282                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4283                                 print " | ";
4284                         }
4285                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4286                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4287                                       "blob") . " | ";
4288                         if ($have_blame) {
4289                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4290                                                              file_name=>$diff->{'file'})},
4291                                               "blame") . " | ";
4292                         }
4293                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4294                                                      file_name=>$diff->{'file'})},
4295                                       "history");
4296                         print "</td>\n";
4297
4298                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4299                         my $mode_chnge = "";
4300                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4301                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4302                                 if ($from_file_type ne $to_file_type) {
4303                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4304                                 }
4305                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4306                                         if ($from_mode_str && $to_mode_str) {
4307                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4308                                         } elsif ($to_mode_str) {
4309                                                 $mode_chnge .= " mode: $to_mode_str";
4310                                         }
4311                                 }
4312                                 $mode_chnge .= "]</span>\n";
4313                         }
4314                         print "<td>";
4315                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4316                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4317                                       -class => "list"}, esc_path($diff->{'file'}));
4318                         print "</td>\n";
4319                         print "<td>$mode_chnge</td>\n";
4320                         print "<td class=\"link\">";
4321                         if ($action eq 'commitdiff') {
4322                                 # link to patch
4323                                 $patchno++;
4324                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4325                                       " | ";
4326                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4327                                 # "commit" view and modified file (not onlu mode changed)
4328                                 print $cgi->a({-href => href(action=>"blobdiff",
4329                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4330                                                              hash_base=>$hash, hash_parent_base=>$parent,
4331                                                              file_name=>$diff->{'file'})},
4332                                               "diff") .
4333                                       " | ";
4334                         }
4335                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4336                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4337                                        "blob") . " | ";
4338                         if ($have_blame) {
4339                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4340                                                              file_name=>$diff->{'file'})},
4341                                               "blame") . " | ";
4342                         }
4343                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4344                                                      file_name=>$diff->{'file'})},
4345                                       "history");
4346                         print "</td>\n";
4347
4348                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4349                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4350                         my $nstatus = $status_name{$diff->{'status'}};
4351                         my $mode_chng = "";
4352                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4353                                 # mode also for directories, so we cannot use $to_mode_str
4354                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4355                         }
4356                         print "<td>" .
4357                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4358                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4359                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4360                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4361                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4362                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4363                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4364                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4365                               "<td class=\"link\">";
4366                         if ($action eq 'commitdiff') {
4367                                 # link to patch
4368                                 $patchno++;
4369                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4370                                       " | ";
4371                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4372                                 # "commit" view and modified file (not only pure rename or copy)
4373                                 print $cgi->a({-href => href(action=>"blobdiff",
4374                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4375                                                              hash_base=>$hash, hash_parent_base=>$parent,
4376                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4377                                               "diff") .
4378                                       " | ";
4379                         }
4380                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4381                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4382                                       "blob") . " | ";
4383                         if ($have_blame) {
4384                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4385                                                              file_name=>$diff->{'to_file'})},
4386                                               "blame") . " | ";
4387                         }
4388                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4389                                                     file_name=>$diff->{'to_file'})},
4390                                       "history");
4391                         print "</td>\n";
4392
4393                 } # we should not encounter Unmerged (U) or Unknown (X) status
4394                 print "</tr>\n";
4395         }
4396         print "</tbody>" if $has_header;
4397         print "</table>\n";
4398 }
4399
4400 sub git_patchset_body {
4401         my ($fd, $difftree, $hash, @hash_parents) = @_;
4402         my ($hash_parent) = $hash_parents[0];
4403
4404         my $is_combined = (@hash_parents > 1);
4405         my $patch_idx = 0;
4406         my $patch_number = 0;
4407         my $patch_line;
4408         my $diffinfo;
4409         my $to_name;
4410         my (%from, %to);
4411
4412         print "<div class=\"patchset\">\n";
4413
4414         # skip to first patch
4415         while ($patch_line = <$fd>) {
4416                 chomp $patch_line;
4417
4418                 last if ($patch_line =~ m/^diff /);
4419         }
4420
4421  PATCH:
4422         while ($patch_line) {
4423
4424                 # parse "git diff" header line
4425                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4426                         # $1 is from_name, which we do not use
4427                         $to_name = unquote($2);
4428                         $to_name =~ s!^b/!!;
4429                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4430                         # $1 is 'cc' or 'combined', which we do not use
4431                         $to_name = unquote($2);
4432                 } else {
4433                         $to_name = undef;
4434                 }
4435
4436                 # check if current patch belong to current raw line
4437                 # and parse raw git-diff line if needed
4438                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4439                         # this is continuation of a split patch
4440                         print "<div class=\"patch cont\">\n";
4441                 } else {
4442                         # advance raw git-diff output if needed
4443                         $patch_idx++ if defined $diffinfo;
4444
4445                         # read and prepare patch information
4446                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4447
4448                         # compact combined diff output can have some patches skipped
4449                         # find which patch (using pathname of result) we are at now;
4450                         if ($is_combined) {
4451                                 while ($to_name ne $diffinfo->{'to_file'}) {
4452                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4453                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4454                                               "</div>\n";  # class="patch"
4455
4456                                         $patch_idx++;
4457                                         $patch_number++;
4458
4459                                         last if $patch_idx > $#$difftree;
4460                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4461                                 }
4462                         }
4463
4464                         # modifies %from, %to hashes
4465                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4466
4467                         # this is first patch for raw difftree line with $patch_idx index
4468                         # we index @$difftree array from 0, but number patches from 1
4469                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4470                 }
4471
4472                 # git diff header
4473                 #assert($patch_line =~ m/^diff /) if DEBUG;
4474                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4475                 $patch_number++;
4476                 # print "git diff" header
4477                 print format_git_diff_header_line($patch_line, $diffinfo,
4478                                                   \%from, \%to);
4479
4480                 # print extended diff header
4481                 print "<div class=\"diff extended_header\">\n";
4482         EXTENDED_HEADER:
4483                 while ($patch_line = <$fd>) {
4484                         chomp $patch_line;
4485
4486                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4487
4488                         print format_extended_diff_header_line($patch_line, $diffinfo,
4489                                                                \%from, \%to);
4490                 }
4491                 print "</div>\n"; # class="diff extended_header"
4492
4493                 # from-file/to-file diff header
4494                 if (! $patch_line) {
4495                         print "</div>\n"; # class="patch"
4496                         last PATCH;
4497                 }
4498                 next PATCH if ($patch_line =~ m/^diff /);
4499                 #assert($patch_line =~ m/^---/) if DEBUG;
4500
4501                 my $last_patch_line = $patch_line;
4502                 $patch_line = <$fd>;
4503                 chomp $patch_line;
4504                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4505
4506                 print format_diff_from_to_header($last_patch_line, $patch_line,
4507                                                  $diffinfo, \%from, \%to,
4508                                                  @hash_parents);
4509
4510                 # the patch itself
4511         LINE:
4512                 while ($patch_line = <$fd>) {
4513                         chomp $patch_line;
4514
4515                         next PATCH if ($patch_line =~ m/^diff /);
4516
4517                         print format_diff_line($patch_line, \%from, \%to);
4518                 }
4519
4520         } continue {
4521                 print "</div>\n"; # class="patch"
4522         }
4523
4524         # for compact combined (--cc) format, with chunk and patch simplification
4525         # the patchset might be empty, but there might be unprocessed raw lines
4526         for (++$patch_idx if $patch_number > 0;
4527              $patch_idx < @$difftree;
4528              ++$patch_idx) {
4529                 # read and prepare patch information
4530                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4531
4532                 # generate anchor for "patch" links in difftree / whatchanged part
4533                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4534                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4535                       "</div>\n";  # class="patch"
4536
4537                 $patch_number++;
4538         }
4539
4540         if ($patch_number == 0) {
4541                 if (@hash_parents > 1) {
4542                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4543                 } else {
4544                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4545                 }
4546         }
4547
4548         print "</div>\n"; # class="patchset"
4549 }
4550
4551 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4552
4553 # fills project list info (age, description, owner, forks) for each
4554 # project in the list, removing invalid projects from returned list
4555 # NOTE: modifies $projlist, but does not remove entries from it
4556 sub fill_project_list_info {
4557         my ($projlist, $check_forks) = @_;
4558         my @projects;
4559
4560         my $show_ctags = gitweb_check_feature('ctags');
4561  PROJECT:
4562         foreach my $pr (@$projlist) {
4563                 my (@activity) = git_get_last_activity($pr->{'path'});
4564                 unless (@activity) {
4565                         next PROJECT;
4566                 }
4567                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4568                 if (!defined $pr->{'descr'}) {
4569                         my $descr = git_get_project_description($pr->{'path'}) || "";
4570                         $descr = to_utf8($descr);
4571                         $pr->{'descr_long'} = $descr;
4572                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4573                 }
4574                 if (!defined $pr->{'owner'}) {
4575                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4576                 }
4577                 if ($check_forks) {
4578                         my $pname = $pr->{'path'};
4579                         if (($pname =~ s/\.git$//) &&
4580                             ($pname !~ /\/$/) &&
4581                             (-d "$projectroot/$pname")) {
4582                                 $pr->{'forks'} = "-d $projectroot/$pname";
4583                         } else {
4584                                 $pr->{'forks'} = 0;
4585                         }
4586                 }
4587                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4588                 push @projects, $pr;
4589         }
4590
4591         return @projects;
4592 }
4593
4594 # print 'sort by' <th> element, generating 'sort by $name' replay link
4595 # if that order is not selected
4596 sub print_sort_th {
4597         print format_sort_th(@_);
4598 }
4599
4600 sub format_sort_th {
4601         my ($name, $order, $header) = @_;
4602         my $sort_th = "";
4603         $header ||= ucfirst($name);
4604
4605         if ($order eq $name) {
4606                 $sort_th .= "<th>$header</th>\n";
4607         } else {
4608                 $sort_th .= "<th>" .
4609                             $cgi->a({-href => href(-replay=>1, order=>$name),
4610                                      -class => "header"}, $header) .
4611                             "</th>\n";
4612         }
4613
4614         return $sort_th;
4615 }
4616
4617 sub git_project_list_body {
4618         # actually uses global variable $project
4619         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4620
4621         my $check_forks = gitweb_check_feature('forks');
4622         my @projects = fill_project_list_info($projlist, $check_forks);
4623
4624         $order ||= $default_projects_order;
4625         $from = 0 unless defined $from;
4626         $to = $#projects if (!defined $to || $#projects < $to);
4627
4628         my %order_info = (
4629                 project => { key => 'path', type => 'str' },
4630                 descr => { key => 'descr_long', type => 'str' },
4631                 owner => { key => 'owner', type => 'str' },
4632                 age => { key => 'age', type => 'num' }
4633         );
4634         my $oi = $order_info{$order};
4635         if ($oi->{'type'} eq 'str') {
4636                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4637         } else {
4638                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4639         }
4640
4641         my $show_ctags = gitweb_check_feature('ctags');
4642         if ($show_ctags) {
4643                 my %ctags;
4644                 foreach my $p (@projects) {
4645                         foreach my $ct (keys %{$p->{'ctags'}}) {
4646                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4647                         }
4648                 }
4649                 my $cloud = git_populate_project_tagcloud(\%ctags);
4650                 print git_show_project_tagcloud($cloud, 64);
4651         }
4652
4653         print "<table class=\"project_list\">\n";
4654         unless ($no_header) {
4655                 print "<tr>\n";
4656                 if ($check_forks) {
4657                         print "<th></th>\n";
4658                 }
4659                 print_sort_th('project', $order, 'Project');
4660                 print_sort_th('descr', $order, 'Description');
4661                 print_sort_th('owner', $order, 'Owner');
4662                 print_sort_th('age', $order, 'Last Change');
4663                 print "<th></th>\n" . # for links
4664                       "</tr>\n";
4665         }
4666         my $alternate = 1;
4667         my $tagfilter = $cgi->param('by_tag');
4668         for (my $i = $from; $i <= $to; $i++) {
4669                 my $pr = $projects[$i];
4670
4671                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4672                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4673                         and not $pr->{'descr_long'} =~ /$searchtext/;
4674                 # Weed out forks or non-matching entries of search
4675                 if ($check_forks) {
4676                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4677                         $forkbase="^$forkbase" if $forkbase;
4678                         next if not $searchtext and not $tagfilter and $show_ctags
4679                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4680                 }
4681
4682                 if ($alternate) {
4683                         print "<tr class=\"dark\">\n";
4684                 } else {
4685                         print "<tr class=\"light\">\n";
4686                 }
4687                 $alternate ^= 1;
4688                 if ($check_forks) {
4689                         print "<td>";
4690                         if ($pr->{'forks'}) {
4691                                 print "<!-- $pr->{'forks'} -->\n";
4692                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4693                         }
4694                         print "</td>\n";
4695                 }
4696                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4697                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4698                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4699                                         -class => "list", -title => $pr->{'descr_long'}},
4700                                         esc_html($pr->{'descr'})) . "</td>\n" .
4701                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4702                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4703                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4704                       "<td class=\"link\">" .
4705                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4706                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4707                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4708                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4709                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4710                       "</td>\n" .
4711                       "</tr>\n";
4712         }
4713         if (defined $extra) {
4714                 print "<tr>\n";
4715                 if ($check_forks) {
4716                         print "<td></td>\n";
4717                 }
4718                 print "<td colspan=\"5\">$extra</td>\n" .
4719                       "</tr>\n";
4720         }
4721         print "</table>\n";
4722 }
4723
4724 sub git_log_body {
4725         # uses global variable $project
4726         my ($commitlist, $from, $to, $refs, $extra) = @_;
4727
4728         $from = 0 unless defined $from;
4729         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4730
4731         for (my $i = 0; $i <= $to; $i++) {
4732                 my %co = %{$commitlist->[$i]};
4733                 next if !%co;
4734                 my $commit = $co{'id'};
4735                 my $ref = format_ref_marker($refs, $commit);
4736                 my %ad = parse_date($co{'author_epoch'});
4737                 git_print_header_div('commit',
4738                                "<span class=\"age\">$co{'age_string'}</span>" .
4739                                esc_html($co{'title'}) . $ref,
4740                                $commit);
4741                 print "<div class=\"title_text\">\n" .
4742                       "<div class=\"log_link\">\n" .
4743                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4744                       " | " .
4745                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4746                       " | " .
4747                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4748                       "<br/>\n" .
4749                       "</div>\n";
4750                       git_print_authorship(\%co, -tag => 'span');
4751                       print "<br/>\n</div>\n";
4752
4753                 print "<div class=\"log_body\">\n";
4754                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4755                 print "</div>\n";
4756         }
4757         if ($extra) {
4758                 print "<div class=\"page_nav\">\n";
4759                 print "$extra\n";
4760                 print "</div>\n";
4761         }
4762 }
4763
4764 sub git_shortlog_body {
4765         # uses global variable $project
4766         my ($commitlist, $from, $to, $refs, $extra) = @_;
4767
4768         $from = 0 unless defined $from;
4769         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4770
4771         print "<table class=\"shortlog\">\n";
4772         my $alternate = 1;
4773         for (my $i = $from; $i <= $to; $i++) {
4774                 my %co = %{$commitlist->[$i]};
4775                 my $commit = $co{'id'};
4776                 my $ref = format_ref_marker($refs, $commit);
4777                 if ($alternate) {
4778                         print "<tr class=\"dark\">\n";
4779                 } else {
4780                         print "<tr class=\"light\">\n";
4781                 }
4782                 $alternate ^= 1;
4783                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4784                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4785                       format_author_html('td', \%co, 10) . "<td>";
4786                 print format_subject_html($co{'title'}, $co{'title_short'},
4787                                           href(action=>"commit", hash=>$commit), $ref);
4788                 print "</td>\n" .
4789                       "<td class=\"link\">" .
4790                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4791                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4792                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4793                 my $snapshot_links = format_snapshot_links($commit);
4794                 if (defined $snapshot_links) {
4795                         print " | " . $snapshot_links;
4796                 }
4797                 print "</td>\n" .
4798                       "</tr>\n";
4799         }
4800         if (defined $extra) {
4801                 print "<tr>\n" .
4802                       "<td colspan=\"4\">$extra</td>\n" .
4803                       "</tr>\n";
4804         }
4805         print "</table>\n";
4806 }
4807
4808 sub git_history_body {
4809         # Warning: assumes constant type (blob or tree) during history
4810         my ($commitlist, $from, $to, $refs, $extra,
4811             $file_name, $file_hash, $ftype) = @_;
4812
4813         $from = 0 unless defined $from;
4814         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4815
4816         print "<table class=\"history\">\n";
4817         my $alternate = 1;
4818         for (my $i = $from; $i <= $to; $i++) {
4819                 my %co = %{$commitlist->[$i]};
4820                 if (!%co) {
4821                         next;
4822                 }
4823                 my $commit = $co{'id'};
4824
4825                 my $ref = format_ref_marker($refs, $commit);
4826
4827                 if ($alternate) {
4828                         print "<tr class=\"dark\">\n";
4829                 } else {
4830                         print "<tr class=\"light\">\n";
4831                 }
4832                 $alternate ^= 1;
4833                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4834         # shortlog:   format_author_html('td', \%co, 10)
4835                       format_author_html('td', \%co, 15, 3) . "<td>";
4836                 # originally git_history used chop_str($co{'title'}, 50)
4837                 print format_subject_html($co{'title'}, $co{'title_short'},
4838                                           href(action=>"commit", hash=>$commit), $ref);
4839                 print "</td>\n" .
4840                       "<td class=\"link\">" .
4841                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4842                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4843
4844                 if ($ftype eq 'blob') {
4845                         my $blob_current = $file_hash;
4846                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4847                         if (defined $blob_current && defined $blob_parent &&
4848                                         $blob_current ne $blob_parent) {
4849                                 print " | " .
4850                                         $cgi->a({-href => href(action=>"blobdiff",
4851                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4852                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4853                                                                file_name=>$file_name)},
4854                                                 "diff to current");
4855                         }
4856                 }
4857                 print "</td>\n" .
4858                       "</tr>\n";
4859         }
4860         if (defined $extra) {
4861                 print "<tr>\n" .
4862                       "<td colspan=\"4\">$extra</td>\n" .
4863                       "</tr>\n";
4864         }
4865         print "</table>\n";
4866 }
4867
4868 sub git_tags_body {
4869         # uses global variable $project
4870         my ($taglist, $from, $to, $extra) = @_;
4871         $from = 0 unless defined $from;
4872         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4873
4874         print "<table class=\"tags\">\n";
4875         my $alternate = 1;
4876         for (my $i = $from; $i <= $to; $i++) {
4877                 my $entry = $taglist->[$i];
4878                 my %tag = %$entry;
4879                 my $comment = $tag{'subject'};
4880                 my $comment_short;
4881                 if (defined $comment) {
4882                         $comment_short = chop_str($comment, 30, 5);
4883                 }
4884                 if ($alternate) {
4885                         print "<tr class=\"dark\">\n";
4886                 } else {
4887                         print "<tr class=\"light\">\n";
4888                 }
4889                 $alternate ^= 1;
4890                 if (defined $tag{'age'}) {
4891                         print "<td><i>$tag{'age'}</i></td>\n";
4892                 } else {
4893                         print "<td></td>\n";
4894                 }
4895                 print "<td>" .
4896                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4897                                -class => "list name"}, esc_html($tag{'name'})) .
4898                       "</td>\n" .
4899                       "<td>";
4900                 if (defined $comment) {
4901                         print format_subject_html($comment, $comment_short,
4902                                                   href(action=>"tag", hash=>$tag{'id'}));
4903                 }
4904                 print "</td>\n" .
4905                       "<td class=\"selflink\">";
4906                 if ($tag{'type'} eq "tag") {
4907                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4908                 } else {
4909                         print "&nbsp;";
4910                 }
4911                 print "</td>\n" .
4912                       "<td class=\"link\">" . " | " .
4913                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4914                 if ($tag{'reftype'} eq "commit") {
4915                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4916                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4917                 } elsif ($tag{'reftype'} eq "blob") {
4918                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4919                 }
4920                 print "</td>\n" .
4921                       "</tr>";
4922         }
4923         if (defined $extra) {
4924                 print "<tr>\n" .
4925                       "<td colspan=\"5\">$extra</td>\n" .
4926                       "</tr>\n";
4927         }
4928         print "</table>\n";
4929 }
4930
4931 sub git_heads_body {
4932         # uses global variable $project
4933         my ($headlist, $head, $from, $to, $extra) = @_;
4934         $from = 0 unless defined $from;
4935         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4936
4937         print "<table class=\"heads\">\n";
4938         my $alternate = 1;
4939         for (my $i = $from; $i <= $to; $i++) {
4940                 my $entry = $headlist->[$i];
4941                 my %ref = %$entry;
4942                 my $curr = $ref{'id'} eq $head;
4943                 if ($alternate) {
4944                         print "<tr class=\"dark\">\n";
4945                 } else {
4946                         print "<tr class=\"light\">\n";
4947                 }
4948                 $alternate ^= 1;
4949                 print "<td><i>$ref{'age'}</i></td>\n" .
4950                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4951                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4952                                -class => "list name"},esc_html($ref{'name'})) .
4953                       "</td>\n" .
4954                       "<td class=\"link\">" .
4955                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4956                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4957                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4958                       "</td>\n" .
4959                       "</tr>";
4960         }
4961         if (defined $extra) {
4962                 print "<tr>\n" .
4963                       "<td colspan=\"3\">$extra</td>\n" .
4964                       "</tr>\n";
4965         }
4966         print "</table>\n";
4967 }
4968
4969 sub git_search_grep_body {
4970         my ($commitlist, $from, $to, $extra) = @_;
4971         $from = 0 unless defined $from;
4972         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4973
4974         print "<table class=\"commit_search\">\n";
4975         my $alternate = 1;
4976         for (my $i = $from; $i <= $to; $i++) {
4977                 my %co = %{$commitlist->[$i]};
4978                 if (!%co) {
4979                         next;
4980                 }
4981                 my $commit = $co{'id'};
4982                 if ($alternate) {
4983                         print "<tr class=\"dark\">\n";
4984                 } else {
4985                         print "<tr class=\"light\">\n";
4986                 }
4987                 $alternate ^= 1;
4988                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4989                       format_author_html('td', \%co, 15, 5) .
4990                       "<td>" .
4991                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4992                                -class => "list subject"},
4993                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4994                 my $comment = $co{'comment'};
4995                 foreach my $line (@$comment) {
4996                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4997                                 my ($lead, $match, $trail) = ($1, $2, $3);
4998                                 $match = chop_str($match, 70, 5, 'center');
4999                                 my $contextlen = int((80 - length($match))/2);
5000                                 $contextlen = 30 if ($contextlen > 30);
5001                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5002                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5003
5004                                 $lead  = esc_html($lead);
5005                                 $match = esc_html($match);
5006                                 $trail = esc_html($trail);
5007
5008                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5009                         }
5010                 }
5011                 print "</td>\n" .
5012                       "<td class=\"link\">" .
5013                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5014                       " | " .
5015                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5016                       " | " .
5017                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5018                 print "</td>\n" .
5019                       "</tr>\n";
5020         }
5021         if (defined $extra) {
5022                 print "<tr>\n" .
5023                       "<td colspan=\"3\">$extra</td>\n" .
5024                       "</tr>\n";
5025         }
5026         print "</table>\n";
5027 }
5028
5029 ## ======================================================================
5030 ## ======================================================================
5031 ## actions
5032
5033 sub git_project_list {
5034         my $order = $input_params{'order'};
5035         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5036                 die_error(400, "Unknown order parameter");
5037         }
5038
5039         my @list = git_get_projects_list();
5040         if (!@list) {
5041                 die_error(404, "No projects found");
5042         }
5043
5044         git_header_html();
5045         if (defined $home_text && -f $home_text) {
5046                 print "<div class=\"index_include\">\n";
5047                 insert_file($home_text);
5048                 print "</div>\n";
5049         }
5050         print $cgi->startform(-method => "get") .
5051               "<p class=\"projsearch\">Search:\n" .
5052               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5053               "</p>" .
5054               $cgi->end_form() . "\n";
5055         git_project_list_body(\@list, $order);
5056         git_footer_html();
5057 }
5058
5059 sub git_forks {
5060         my $order = $input_params{'order'};
5061         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5062                 die_error(400, "Unknown order parameter");
5063         }
5064
5065         my @list = git_get_projects_list($project);
5066         if (!@list) {
5067                 die_error(404, "No forks found");
5068         }
5069
5070         git_header_html();
5071         git_print_page_nav('','');
5072         git_print_header_div('summary', "$project forks");
5073         git_project_list_body(\@list, $order);
5074         git_footer_html();
5075 }
5076
5077 sub git_project_index {
5078         my @projects = git_get_projects_list($project);
5079
5080         print $cgi->header(
5081                 -type => 'text/plain',
5082                 -charset => 'utf-8',
5083                 -content_disposition => 'inline; filename="index.aux"');
5084
5085         foreach my $pr (@projects) {
5086                 if (!exists $pr->{'owner'}) {
5087                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5088                 }
5089
5090                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5091                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5092                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5093                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5094                 $path  =~ s/ /\+/g;
5095                 $owner =~ s/ /\+/g;
5096
5097                 print "$path $owner\n";
5098         }
5099 }
5100
5101 sub git_summary {
5102         my $descr = git_get_project_description($project) || "none";
5103         my %co = parse_commit("HEAD");
5104         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5105         my $head = $co{'id'};
5106
5107         my $owner = git_get_project_owner($project);
5108
5109         my $refs = git_get_references();
5110         # These get_*_list functions return one more to allow us to see if
5111         # there are more ...
5112         my @taglist  = git_get_tags_list(16);
5113         my @headlist = git_get_heads_list(16);
5114         my @forklist;
5115         my $check_forks = gitweb_check_feature('forks');
5116
5117         if ($check_forks) {
5118                 @forklist = git_get_projects_list($project);
5119         }
5120
5121         git_header_html();
5122         git_print_page_nav('summary','', $head);
5123
5124         print "<div class=\"title\">&nbsp;</div>\n";
5125         print "<table class=\"projects_list\">\n" .
5126               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5127               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5128         if (defined $cd{'rfc2822'}) {
5129                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5130         }
5131
5132         # use per project git URL list in $projectroot/$project/cloneurl
5133         # or make project git URL from git base URL and project name
5134         my $url_tag = "URL";
5135         my @url_list = git_get_project_url_list($project);
5136         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5137         foreach my $git_url (@url_list) {
5138                 next unless $git_url;
5139                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5140                 $url_tag = "";
5141         }
5142
5143         # Tag cloud
5144         my $show_ctags = gitweb_check_feature('ctags');
5145         if ($show_ctags) {
5146                 my $ctags = git_get_project_ctags($project);
5147                 my $cloud = git_populate_project_tagcloud($ctags);
5148                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5149                 print "</td>\n<td>" unless %$ctags;
5150                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5151                 print "</td>\n<td>" if %$ctags;
5152                 print git_show_project_tagcloud($cloud, 48);
5153                 print "</td></tr>";
5154         }
5155
5156         print "</table>\n";
5157
5158         # If XSS prevention is on, we don't include README.html.
5159         # TODO: Allow a readme in some safe format.
5160         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5161                 print "<div class=\"title\">readme</div>\n" .
5162                       "<div class=\"readme\">\n";
5163                 insert_file("$projectroot/$project/README.html");
5164                 print "\n</div>\n"; # class="readme"
5165         }
5166
5167         # we need to request one more than 16 (0..15) to check if
5168         # those 16 are all
5169         my @commitlist = $head ? parse_commits($head, 17) : ();
5170         if (@commitlist) {
5171                 git_print_header_div('shortlog');
5172                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5173                                   $#commitlist <=  15 ? undef :
5174                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5175         }
5176
5177         if (@taglist) {
5178                 git_print_header_div('tags');
5179                 git_tags_body(\@taglist, 0, 15,
5180                               $#taglist <=  15 ? undef :
5181                               $cgi->a({-href => href(action=>"tags")}, "..."));
5182         }
5183
5184         if (@headlist) {
5185                 git_print_header_div('heads');
5186                 git_heads_body(\@headlist, $head, 0, 15,
5187                                $#headlist <= 15 ? undef :
5188                                $cgi->a({-href => href(action=>"heads")}, "..."));
5189         }
5190
5191         if (@forklist) {
5192                 git_print_header_div('forks');
5193                 git_project_list_body(\@forklist, 'age', 0, 15,
5194                                       $#forklist <= 15 ? undef :
5195                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5196                                       'no_header');
5197         }
5198
5199         git_footer_html();
5200 }
5201
5202 sub git_tag {
5203         my %tag = parse_tag($hash);
5204
5205         if (! %tag) {
5206                 die_error(404, "Unknown tag object");
5207         }
5208
5209         my $head = git_get_head_hash($project);
5210         git_header_html();
5211         git_print_page_nav('','', $head,undef,$head);
5212         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5213         print "<div class=\"title_text\">\n" .
5214               "<table class=\"object_header\">\n" .
5215               "<tr>\n" .
5216               "<td>object</td>\n" .
5217               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5218                                $tag{'object'}) . "</td>\n" .
5219               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5220                                               $tag{'type'}) . "</td>\n" .
5221               "</tr>\n";
5222         if (defined($tag{'author'})) {
5223                 git_print_authorship_rows(\%tag, 'author');
5224         }
5225         print "</table>\n\n" .
5226               "</div>\n";
5227         print "<div class=\"page_body\">";
5228         my $comment = $tag{'comment'};
5229         foreach my $line (@$comment) {
5230                 chomp $line;
5231                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5232         }
5233         print "</div>\n";
5234         git_footer_html();
5235 }
5236
5237 sub git_blame_common {
5238         my $format = shift || 'porcelain';
5239         if ($format eq 'porcelain' && $cgi->param('js')) {
5240                 $format = 'incremental';
5241                 $action = 'blame_incremental'; # for page title etc
5242         }
5243
5244         # permissions
5245         gitweb_check_feature('blame')
5246                 or die_error(403, "Blame view not allowed");
5247
5248         # error checking
5249         die_error(400, "No file name given") unless $file_name;
5250         $hash_base ||= git_get_head_hash($project);
5251         die_error(404, "Couldn't find base commit") unless $hash_base;
5252         my %co = parse_commit($hash_base)
5253                 or die_error(404, "Commit not found");
5254         my $ftype = "blob";
5255         if (!defined $hash) {
5256                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5257                         or die_error(404, "Error looking up file");
5258         } else {
5259                 $ftype = git_get_type($hash);
5260                 if ($ftype !~ "blob") {
5261                         die_error(400, "Object is not a blob");
5262                 }
5263         }
5264
5265         my $fd;
5266         if ($format eq 'incremental') {
5267                 # get file contents (as base)
5268                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5269                         or die_error(500, "Open git-cat-file failed");
5270         } elsif ($format eq 'data') {
5271                 # run git-blame --incremental
5272                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5273                         $hash_base, "--", $file_name
5274                         or die_error(500, "Open git-blame --incremental failed");
5275         } else {
5276                 # run git-blame --porcelain
5277                 open $fd, "-|", git_cmd(), "blame", '-p',
5278                         $hash_base, '--', $file_name
5279                         or die_error(500, "Open git-blame --porcelain failed");
5280         }
5281
5282         # incremental blame data returns early
5283         if ($format eq 'data') {
5284                 print $cgi->header(
5285                         -type=>"text/plain", -charset => "utf-8",
5286                         -status=> "200 OK");
5287                 local $| = 1; # output autoflush
5288                 print while <$fd>;
5289                 close $fd
5290                         or print "ERROR $!\n";
5291
5292                 print 'END';
5293                 if (defined $t0 && gitweb_check_feature('timed')) {
5294                         print ' '.
5295                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5296                               ' '.$number_of_git_cmds;
5297                 }
5298                 print "\n";
5299
5300                 return;
5301         }
5302
5303         # page header
5304         git_header_html();
5305         my $formats_nav =
5306                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5307                         "blob") .
5308                 " | ";
5309         if ($format eq 'incremental') {
5310                 $formats_nav .=
5311                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5312                                 "blame") . " (non-incremental)";
5313         } else {
5314                 $formats_nav .=
5315                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5316                                 "blame") . " (incremental)";
5317         }
5318         $formats_nav .=
5319                 " | " .
5320                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5321                         "history") .
5322                 " | " .
5323                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5324                         "HEAD");
5325         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5326         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5327         git_print_page_path($file_name, $ftype, $hash_base);
5328
5329         # page body
5330         if ($format eq 'incremental') {
5331                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5332                       "This page requires JavaScript to run.\n Use ".
5333                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5334                               'this page').
5335                       " instead.\n".
5336                       "</b></center></div>\n</noscript>\n";
5337
5338                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5339         }
5340
5341         print qq!<div class="page_body">\n!;
5342         print qq!<div id="progress_info">... / ...</div>\n!
5343                 if ($format eq 'incremental');
5344         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5345               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5346               qq!<thead>\n!.
5347               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5348               qq!</thead>\n!.
5349               qq!<tbody>\n!;
5350
5351         my @rev_color = qw(light dark);
5352         my $num_colors = scalar(@rev_color);
5353         my $current_color = 0;
5354
5355         if ($format eq 'incremental') {
5356                 my $color_class = $rev_color[$current_color];
5357
5358                 #contents of a file
5359                 my $linenr = 0;
5360         LINE:
5361                 while (my $line = <$fd>) {
5362                         chomp $line;
5363                         $linenr++;
5364
5365                         print qq!<tr id="l$linenr" class="$color_class">!.
5366                               qq!<td class="sha1"><a href=""> </a></td>!.
5367                               qq!<td class="linenr">!.
5368                               qq!<a class="linenr" href="">$linenr</a></td>!;
5369                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5370                         print qq!</tr>\n!;
5371                 }
5372
5373         } else { # porcelain, i.e. ordinary blame
5374                 my %metainfo = (); # saves information about commits
5375
5376                 # blame data
5377         LINE:
5378                 while (my $line = <$fd>) {
5379                         chomp $line;
5380                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5381                         # no <lines in group> for subsequent lines in group of lines
5382                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5383                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5384                         if (!exists $metainfo{$full_rev}) {
5385                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5386                         }
5387                         my $meta = $metainfo{$full_rev};
5388                         my $data;
5389                         while ($data = <$fd>) {
5390                                 chomp $data;
5391                                 last if ($data =~ s/^\t//); # contents of line
5392                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5393                                         $meta->{$1} = $2 unless exists $meta->{$1};
5394                                 }
5395                                 if ($data =~ /^previous /) {
5396                                         $meta->{'nprevious'}++;
5397                                 }
5398                         }
5399                         my $short_rev = substr($full_rev, 0, 8);
5400                         my $author = $meta->{'author'};
5401                         my %date =
5402                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5403                         my $date = $date{'iso-tz'};
5404                         if ($group_size) {
5405                                 $current_color = ($current_color + 1) % $num_colors;
5406                         }
5407                         my $tr_class = $rev_color[$current_color];
5408                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5409                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5410                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5411                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5412                         if ($group_size) {
5413                                 print "<td class=\"sha1\"";
5414                                 print " title=\"". esc_html($author) . ", $date\"";
5415                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5416                                 print ">";
5417                                 print $cgi->a({-href => href(action=>"commit",
5418                                                              hash=>$full_rev,
5419                                                              file_name=>$file_name)},
5420                                               esc_html($short_rev));
5421                                 if ($group_size >= 2) {
5422                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5423                                         if (@author_initials) {
5424                                                 print "<br />" .
5425                                                       esc_html(join('', @author_initials));
5426                                                 #           or join('.', ...)
5427                                         }
5428                                 }
5429                                 print "</td>\n";
5430                         }
5431                         # 'previous' <sha1 of parent commit> <filename at commit>
5432                         if (exists $meta->{'previous'} &&
5433                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5434                                 $meta->{'parent'} = $1;
5435                                 $meta->{'file_parent'} = unquote($2);
5436                         }
5437                         my $linenr_commit =
5438                                 exists($meta->{'parent'}) ?
5439                                 $meta->{'parent'} : $full_rev;
5440                         my $linenr_filename =
5441                                 exists($meta->{'file_parent'}) ?
5442                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5443                         my $blamed = href(action => 'blame',
5444                                           file_name => $linenr_filename,
5445                                           hash_base => $linenr_commit);
5446                         print "<td class=\"linenr\">";
5447                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5448                                         -class => "linenr" },
5449                                       esc_html($lineno));
5450                         print "</td>";
5451                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5452                         print "</tr>\n";
5453                 } # end while
5454
5455         }
5456
5457         # footer
5458         print "</tbody>\n".
5459               "</table>\n"; # class="blame"
5460         print "</div>\n";   # class="blame_body"
5461         close $fd
5462                 or print "Reading blob failed\n";
5463
5464         git_footer_html();
5465 }
5466
5467 sub git_blame {
5468         git_blame_common();
5469 }
5470
5471 sub git_blame_incremental {
5472         git_blame_common('incremental');
5473 }
5474
5475 sub git_blame_data {
5476         git_blame_common('data');
5477 }
5478
5479 sub git_tags {
5480         my $head = git_get_head_hash($project);
5481         git_header_html();
5482         git_print_page_nav('','', $head,undef,$head);
5483         git_print_header_div('summary', $project);
5484
5485         my @tagslist = git_get_tags_list();
5486         if (@tagslist) {
5487                 git_tags_body(\@tagslist);
5488         }
5489         git_footer_html();
5490 }
5491
5492 sub git_heads {
5493         my $head = git_get_head_hash($project);
5494         git_header_html();
5495         git_print_page_nav('','', $head,undef,$head);
5496         git_print_header_div('summary', $project);
5497
5498         my @headslist = git_get_heads_list();
5499         if (@headslist) {
5500                 git_heads_body(\@headslist, $head);
5501         }
5502         git_footer_html();
5503 }
5504
5505 sub git_blob_plain {
5506         my $type = shift;
5507         my $expires;
5508
5509         if (!defined $hash) {
5510                 if (defined $file_name) {
5511                         my $base = $hash_base || git_get_head_hash($project);
5512                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5513                                 or die_error(404, "Cannot find file");
5514                 } else {
5515                         die_error(400, "No file name defined");
5516                 }
5517         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5518                 # blobs defined by non-textual hash id's can be cached
5519                 $expires = "+1d";
5520         }
5521
5522         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5523                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5524
5525         # content-type (can include charset)
5526         $type = blob_contenttype($fd, $file_name, $type);
5527
5528         # "save as" filename, even when no $file_name is given
5529         my $save_as = "$hash";
5530         if (defined $file_name) {
5531                 $save_as = $file_name;
5532         } elsif ($type =~ m/^text\//) {
5533                 $save_as .= '.txt';
5534         }
5535
5536         # With XSS prevention on, blobs of all types except a few known safe
5537         # ones are served with "Content-Disposition: attachment" to make sure
5538         # they don't run in our security domain.  For certain image types,
5539         # blob view writes an <img> tag referring to blob_plain view, and we
5540         # want to be sure not to break that by serving the image as an
5541         # attachment (though Firefox 3 doesn't seem to care).
5542         my $sandbox = $prevent_xss &&
5543                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5544
5545         print $cgi->header(
5546                 -type => $type,
5547                 -expires => $expires,
5548                 -content_disposition =>
5549                         ($sandbox ? 'attachment' : 'inline')
5550                         . '; filename="' . $save_as . '"');
5551         local $/ = undef;
5552         binmode STDOUT, ':raw';
5553         print <$fd>;
5554         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5555         close $fd;
5556 }
5557
5558 sub git_blob {
5559         my $expires;
5560
5561         if (!defined $hash) {
5562                 if (defined $file_name) {
5563                         my $base = $hash_base || git_get_head_hash($project);
5564                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5565                                 or die_error(404, "Cannot find file");
5566                 } else {
5567                         die_error(400, "No file name defined");
5568                 }
5569         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5570                 # blobs defined by non-textual hash id's can be cached
5571                 $expires = "+1d";
5572         }
5573
5574         my $have_blame = gitweb_check_feature('blame');
5575         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5576                 or die_error(500, "Couldn't cat $file_name, $hash");
5577         my $mimetype = blob_mimetype($fd, $file_name);
5578         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5579         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5580                 close $fd;
5581                 return git_blob_plain($mimetype);
5582         }
5583         # we can have blame only for text/* mimetype
5584         $have_blame &&= ($mimetype =~ m!^text/!);
5585
5586         my $highlight = gitweb_check_feature('highlight');
5587         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5588         $fd = run_highlighter($fd, $highlight, $syntax)
5589                 if $syntax;
5590
5591         git_header_html(undef, $expires);
5592         my $formats_nav = '';
5593         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5594                 if (defined $file_name) {
5595                         if ($have_blame) {
5596                                 $formats_nav .=
5597                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5598                                                 "blame") .
5599                                         " | ";
5600                         }
5601                         $formats_nav .=
5602                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5603                                         "history") .
5604                                 " | " .
5605                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5606                                         "raw") .
5607                                 " | " .
5608                                 $cgi->a({-href => href(action=>"blob",
5609                                                        hash_base=>"HEAD", file_name=>$file_name)},
5610                                         "HEAD");
5611                 } else {
5612                         $formats_nav .=
5613                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5614                                         "raw");
5615                 }
5616                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5617                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5618         } else {
5619                 print "<div class=\"page_nav\">\n" .
5620                       "<br/><br/></div>\n" .
5621                       "<div class=\"title\">$hash</div>\n";
5622         }
5623         git_print_page_path($file_name, "blob", $hash_base);
5624         print "<div class=\"page_body\">\n";
5625         if ($mimetype =~ m!^image/!) {
5626                 print qq!<img type="$mimetype"!;
5627                 if ($file_name) {
5628                         print qq! alt="$file_name" title="$file_name"!;
5629                 }
5630                 print qq! src="! .
5631                       href(action=>"blob_plain", hash=>$hash,
5632                            hash_base=>$hash_base, file_name=>$file_name) .
5633                       qq!" />\n!;
5634         } else {
5635                 my $nr;
5636                 while (my $line = <$fd>) {
5637                         chomp $line;
5638                         $nr++;
5639                         $line = untabify($line);
5640                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5641                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5642                 }
5643         }
5644         close $fd
5645                 or print "Reading blob failed.\n";
5646         print "</div>";
5647         git_footer_html();
5648 }
5649
5650 sub git_tree {
5651         if (!defined $hash_base) {
5652                 $hash_base = "HEAD";
5653         }
5654         if (!defined $hash) {
5655                 if (defined $file_name) {
5656                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5657                 } else {
5658                         $hash = $hash_base;
5659                 }
5660         }
5661         die_error(404, "No such tree") unless defined($hash);
5662
5663         my $show_sizes = gitweb_check_feature('show-sizes');
5664         my $have_blame = gitweb_check_feature('blame');
5665
5666         my @entries = ();
5667         {
5668                 local $/ = "\0";
5669                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5670                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5671                         or die_error(500, "Open git-ls-tree failed");
5672                 @entries = map { chomp; $_ } <$fd>;
5673                 close $fd
5674                         or die_error(404, "Reading tree failed");
5675         }
5676
5677         my $refs = git_get_references();
5678         my $ref = format_ref_marker($refs, $hash_base);
5679         git_header_html();
5680         my $basedir = '';
5681         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5682                 my @views_nav = ();
5683                 if (defined $file_name) {
5684                         push @views_nav,
5685                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5686                                         "history"),
5687                                 $cgi->a({-href => href(action=>"tree",
5688                                                        hash_base=>"HEAD", file_name=>$file_name)},
5689                                         "HEAD"),
5690                 }
5691                 my $snapshot_links = format_snapshot_links($hash);
5692                 if (defined $snapshot_links) {
5693                         # FIXME: Should be available when we have no hash base as well.
5694                         push @views_nav, $snapshot_links;
5695                 }
5696                 git_print_page_nav('tree','', $hash_base, undef, undef,
5697                                    join(' | ', @views_nav));
5698                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5699         } else {
5700                 undef $hash_base;
5701                 print "<div class=\"page_nav\">\n";
5702                 print "<br/><br/></div>\n";
5703                 print "<div class=\"title\">$hash</div>\n";
5704         }
5705         if (defined $file_name) {
5706                 $basedir = $file_name;
5707                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5708                         $basedir .= '/';
5709                 }
5710                 git_print_page_path($file_name, 'tree', $hash_base);
5711         }
5712         print "<div class=\"page_body\">\n";
5713         print "<table class=\"tree\">\n";
5714         my $alternate = 1;
5715         # '..' (top directory) link if possible
5716         if (defined $hash_base &&
5717             defined $file_name && $file_name =~ m![^/]+$!) {
5718                 if ($alternate) {
5719                         print "<tr class=\"dark\">\n";
5720                 } else {
5721                         print "<tr class=\"light\">\n";
5722                 }
5723                 $alternate ^= 1;
5724
5725                 my $up = $file_name;
5726                 $up =~ s!/?[^/]+$!!;
5727                 undef $up unless $up;
5728                 # based on git_print_tree_entry
5729                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5730                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5731                 print '<td class="list">';
5732                 print $cgi->a({-href => href(action=>"tree",
5733                                              hash_base=>$hash_base,
5734                                              file_name=>$up)},
5735                               "..");
5736                 print "</td>\n";
5737                 print "<td class=\"link\"></td>\n";
5738
5739                 print "</tr>\n";
5740         }
5741         foreach my $line (@entries) {
5742                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5743
5744                 if ($alternate) {
5745                         print "<tr class=\"dark\">\n";
5746                 } else {
5747                         print "<tr class=\"light\">\n";
5748                 }
5749                 $alternate ^= 1;
5750
5751                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5752
5753                 print "</tr>\n";
5754         }
5755         print "</table>\n" .
5756               "</div>";
5757         git_footer_html();
5758 }
5759
5760 sub snapshot_name {
5761         my ($project, $hash) = @_;
5762
5763         # path/to/project.git  -> project
5764         # path/to/project/.git -> project
5765         my $name = to_utf8($project);
5766         $name =~ s,([^/])/*\.git$,$1,;
5767         $name = basename($name);
5768         # sanitize name
5769         $name =~ s/[[:cntrl:]]/?/g;
5770
5771         my $ver = $hash;
5772         if ($hash =~ /^[0-9a-fA-F]+$/) {
5773                 # shorten SHA-1 hash
5774                 my $full_hash = git_get_full_hash($project, $hash);
5775                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5776                         $ver = git_get_short_hash($project, $hash);
5777                 }
5778         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5779                 # tags don't need shortened SHA-1 hash
5780                 $ver = $1;
5781         } else {
5782                 # branches and other need shortened SHA-1 hash
5783                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5784                         $ver = $1;
5785                 }
5786                 $ver .= '-' . git_get_short_hash($project, $hash);
5787         }
5788         # in case of hierarchical branch names
5789         $ver =~ s!/!.!g;
5790
5791         # name = project-version_string
5792         $name = "$name-$ver";
5793
5794         return wantarray ? ($name, $name) : $name;
5795 }
5796
5797 sub git_snapshot {
5798         my $format = $input_params{'snapshot_format'};
5799         if (!@snapshot_fmts) {
5800                 die_error(403, "Snapshots not allowed");
5801         }
5802         # default to first supported snapshot format
5803         $format ||= $snapshot_fmts[0];
5804         if ($format !~ m/^[a-z0-9]+$/) {
5805                 die_error(400, "Invalid snapshot format parameter");
5806         } elsif (!exists($known_snapshot_formats{$format})) {
5807                 die_error(400, "Unknown snapshot format");
5808         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5809                 die_error(403, "Snapshot format not allowed");
5810         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5811                 die_error(403, "Unsupported snapshot format");
5812         }
5813
5814         my $type = git_get_type("$hash^{}");
5815         if (!$type) {
5816                 die_error(404, 'Object does not exist');
5817         }  elsif ($type eq 'blob') {
5818                 die_error(400, 'Object is not a tree-ish');
5819         }
5820
5821         my ($name, $prefix) = snapshot_name($project, $hash);
5822         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5823         my $cmd = quote_command(
5824                 git_cmd(), 'archive',
5825                 "--format=$known_snapshot_formats{$format}{'format'}",
5826                 "--prefix=$prefix/", $hash);
5827         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5828                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5829         }
5830
5831         $filename =~ s/(["\\])/\\$1/g;
5832         print $cgi->header(
5833                 -type => $known_snapshot_formats{$format}{'type'},
5834                 -content_disposition => 'inline; filename="' . $filename . '"',
5835                 -status => '200 OK');
5836
5837         open my $fd, "-|", $cmd
5838                 or die_error(500, "Execute git-archive failed");
5839         binmode STDOUT, ':raw';
5840         print <$fd>;
5841         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5842         close $fd;
5843 }
5844
5845 sub git_log_generic {
5846         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5847
5848         my $head = git_get_head_hash($project);
5849         if (!defined $base) {
5850                 $base = $head;
5851         }
5852         if (!defined $page) {
5853                 $page = 0;
5854         }
5855         my $refs = git_get_references();
5856
5857         my $commit_hash = $base;
5858         if (defined $parent) {
5859                 $commit_hash = "$parent..$base";
5860         }
5861         my @commitlist =
5862                 parse_commits($commit_hash, 101, (100 * $page),
5863                               defined $file_name ? ($file_name, "--full-history") : ());
5864
5865         my $ftype;
5866         if (!defined $file_hash && defined $file_name) {
5867                 # some commits could have deleted file in question,
5868                 # and not have it in tree, but one of them has to have it
5869                 for (my $i = 0; $i < @commitlist; $i++) {
5870                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5871                         last if defined $file_hash;
5872                 }
5873         }
5874         if (defined $file_hash) {
5875                 $ftype = git_get_type($file_hash);
5876         }
5877         if (defined $file_name && !defined $ftype) {
5878                 die_error(500, "Unknown type of object");
5879         }
5880         my %co;
5881         if (defined $file_name) {
5882                 %co = parse_commit($base)
5883                         or die_error(404, "Unknown commit object");
5884         }
5885
5886
5887         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5888         my $next_link = '';
5889         if ($#commitlist >= 100) {
5890                 $next_link =
5891                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5892                                  -accesskey => "n", -title => "Alt-n"}, "next");
5893         }
5894         my $patch_max = gitweb_get_feature('patches');
5895         if ($patch_max && !defined $file_name) {
5896                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5897                         $paging_nav .= " &sdot; " .
5898                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5899                                         "patches");
5900                 }
5901         }
5902
5903         git_header_html();
5904         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5905         if (defined $file_name) {
5906                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5907         } else {
5908                 git_print_header_div('summary', $project)
5909         }
5910         git_print_page_path($file_name, $ftype, $hash_base)
5911                 if (defined $file_name);
5912
5913         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5914                      $file_name, $file_hash, $ftype);
5915
5916         git_footer_html();
5917 }
5918
5919 sub git_log {
5920         git_log_generic('log', \&git_log_body,
5921                         $hash, $hash_parent);
5922 }
5923
5924 sub git_commit {
5925         $hash ||= $hash_base || "HEAD";
5926         my %co = parse_commit($hash)
5927             or die_error(404, "Unknown commit object");
5928
5929         my $parent  = $co{'parent'};
5930         my $parents = $co{'parents'}; # listref
5931
5932         # we need to prepare $formats_nav before any parameter munging
5933         my $formats_nav;
5934         if (!defined $parent) {
5935                 # --root commitdiff
5936                 $formats_nav .= '(initial)';
5937         } elsif (@$parents == 1) {
5938                 # single parent commit
5939                 $formats_nav .=
5940                         '(parent: ' .
5941                         $cgi->a({-href => href(action=>"commit",
5942                                                hash=>$parent)},
5943                                 esc_html(substr($parent, 0, 7))) .
5944                         ')';
5945         } else {
5946                 # merge commit
5947                 $formats_nav .=
5948                         '(merge: ' .
5949                         join(' ', map {
5950                                 $cgi->a({-href => href(action=>"commit",
5951                                                        hash=>$_)},
5952                                         esc_html(substr($_, 0, 7)));
5953                         } @$parents ) .
5954                         ')';
5955         }
5956         if (gitweb_check_feature('patches') && @$parents <= 1) {
5957                 $formats_nav .= " | " .
5958                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5959                                 "patch");
5960         }
5961
5962         if (!defined $parent) {
5963                 $parent = "--root";
5964         }
5965         my @difftree;
5966         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5967                 @diff_opts,
5968                 (@$parents <= 1 ? $parent : '-c'),
5969                 $hash, "--"
5970                 or die_error(500, "Open git-diff-tree failed");
5971         @difftree = map { chomp; $_ } <$fd>;
5972         close $fd or die_error(404, "Reading git-diff-tree failed");
5973
5974         # non-textual hash id's can be cached
5975         my $expires;
5976         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5977                 $expires = "+1d";
5978         }
5979         my $refs = git_get_references();
5980         my $ref = format_ref_marker($refs, $co{'id'});
5981
5982         git_header_html(undef, $expires);
5983         git_print_page_nav('commit', '',
5984                            $hash, $co{'tree'}, $hash,
5985                            $formats_nav);
5986
5987         if (defined $co{'parent'}) {
5988                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5989         } else {
5990                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5991         }
5992         print "<div class=\"title_text\">\n" .
5993               "<table class=\"object_header\">\n";
5994         git_print_authorship_rows(\%co);
5995         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5996         print "<tr>" .
5997               "<td>tree</td>" .
5998               "<td class=\"sha1\">" .
5999               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6000                        class => "list"}, $co{'tree'}) .
6001               "</td>" .
6002               "<td class=\"link\">" .
6003               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6004                       "tree");
6005         my $snapshot_links = format_snapshot_links($hash);
6006         if (defined $snapshot_links) {
6007                 print " | " . $snapshot_links;
6008         }
6009         print "</td>" .
6010               "</tr>\n";
6011
6012         foreach my $par (@$parents) {
6013                 print "<tr>" .
6014                       "<td>parent</td>" .
6015                       "<td class=\"sha1\">" .
6016                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6017                                class => "list"}, $par) .
6018                       "</td>" .
6019                       "<td class=\"link\">" .
6020                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6021                       " | " .
6022                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6023                       "</td>" .
6024                       "</tr>\n";
6025         }
6026         print "</table>".
6027               "</div>\n";
6028
6029         print "<div class=\"page_body\">\n";
6030         git_print_log($co{'comment'});
6031         print "</div>\n";
6032
6033         git_difftree_body(\@difftree, $hash, @$parents);
6034
6035         git_footer_html();
6036 }
6037
6038 sub git_object {
6039         # object is defined by:
6040         # - hash or hash_base alone
6041         # - hash_base and file_name
6042         my $type;
6043
6044         # - hash or hash_base alone
6045         if ($hash || ($hash_base && !defined $file_name)) {
6046                 my $object_id = $hash || $hash_base;
6047
6048                 open my $fd, "-|", quote_command(
6049                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6050                         or die_error(404, "Object does not exist");
6051                 $type = <$fd>;
6052                 chomp $type;
6053                 close $fd
6054                         or die_error(404, "Object does not exist");
6055
6056         # - hash_base and file_name
6057         } elsif ($hash_base && defined $file_name) {
6058                 $file_name =~ s,/+$,,;
6059
6060                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6061                         or die_error(404, "Base object does not exist");
6062
6063                 # here errors should not hapen
6064                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6065                         or die_error(500, "Open git-ls-tree failed");
6066                 my $line = <$fd>;
6067                 close $fd;
6068
6069                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6070                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6071                         die_error(404, "File or directory for given base does not exist");
6072                 }
6073                 $type = $2;
6074                 $hash = $3;
6075         } else {
6076                 die_error(400, "Not enough information to find object");
6077         }
6078
6079         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6080                                           hash=>$hash, hash_base=>$hash_base,
6081                                           file_name=>$file_name),
6082                              -status => '302 Found');
6083 }
6084
6085 sub git_blobdiff {
6086         my $format = shift || 'html';
6087
6088         my $fd;
6089         my @difftree;
6090         my %diffinfo;
6091         my $expires;
6092
6093         # preparing $fd and %diffinfo for git_patchset_body
6094         # new style URI
6095         if (defined $hash_base && defined $hash_parent_base) {
6096                 if (defined $file_name) {
6097                         # read raw output
6098                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6099                                 $hash_parent_base, $hash_base,
6100                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6101                                 or die_error(500, "Open git-diff-tree failed");
6102                         @difftree = map { chomp; $_ } <$fd>;
6103                         close $fd
6104                                 or die_error(404, "Reading git-diff-tree failed");
6105                         @difftree
6106                                 or die_error(404, "Blob diff not found");
6107
6108                 } elsif (defined $hash &&
6109                          $hash =~ /[0-9a-fA-F]{40}/) {
6110                         # try to find filename from $hash
6111
6112                         # read filtered raw output
6113                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6114                                 $hash_parent_base, $hash_base, "--"
6115                                 or die_error(500, "Open git-diff-tree failed");
6116                         @difftree =
6117                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6118                                 # $hash == to_id
6119                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6120                                 map { chomp; $_ } <$fd>;
6121                         close $fd
6122                                 or die_error(404, "Reading git-diff-tree failed");
6123                         @difftree
6124                                 or die_error(404, "Blob diff not found");
6125
6126                 } else {
6127                         die_error(400, "Missing one of the blob diff parameters");
6128                 }
6129
6130                 if (@difftree > 1) {
6131                         die_error(400, "Ambiguous blob diff specification");
6132                 }
6133
6134                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6135                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6136                 $file_name   ||= $diffinfo{'to_file'};
6137
6138                 $hash_parent ||= $diffinfo{'from_id'};
6139                 $hash        ||= $diffinfo{'to_id'};
6140
6141                 # non-textual hash id's can be cached
6142                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6143                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6144                         $expires = '+1d';
6145                 }
6146
6147                 # open patch output
6148                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6149                         '-p', ($format eq 'html' ? "--full-index" : ()),
6150                         $hash_parent_base, $hash_base,
6151                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6152                         or die_error(500, "Open git-diff-tree failed");
6153         }
6154
6155         # old/legacy style URI -- not generated anymore since 1.4.3.
6156         if (!%diffinfo) {
6157                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6158         }
6159
6160         # header
6161         if ($format eq 'html') {
6162                 my $formats_nav =
6163                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6164                                 "raw");
6165                 git_header_html(undef, $expires);
6166                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6167                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6168                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6169                 } else {
6170                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6171                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6172                 }
6173                 if (defined $file_name) {
6174                         git_print_page_path($file_name, "blob", $hash_base);
6175                 } else {
6176                         print "<div class=\"page_path\"></div>\n";
6177                 }
6178
6179         } elsif ($format eq 'plain') {
6180                 print $cgi->header(
6181                         -type => 'text/plain',
6182                         -charset => 'utf-8',
6183                         -expires => $expires,
6184                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6185
6186                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6187
6188         } else {
6189                 die_error(400, "Unknown blobdiff format");
6190         }
6191
6192         # patch
6193         if ($format eq 'html') {
6194                 print "<div class=\"page_body\">\n";
6195
6196                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6197                 close $fd;
6198
6199                 print "</div>\n"; # class="page_body"
6200                 git_footer_html();
6201
6202         } else {
6203                 while (my $line = <$fd>) {
6204                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6205                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6206
6207                         print $line;
6208
6209                         last if $line =~ m!^\+\+\+!;
6210                 }
6211                 local $/ = undef;
6212                 print <$fd>;
6213                 close $fd;
6214         }
6215 }
6216
6217 sub git_blobdiff_plain {
6218         git_blobdiff('plain');
6219 }
6220
6221 sub git_commitdiff {
6222         my %params = @_;
6223         my $format = $params{-format} || 'html';
6224
6225         my ($patch_max) = gitweb_get_feature('patches');
6226         if ($format eq 'patch') {
6227                 die_error(403, "Patch view not allowed") unless $patch_max;
6228         }
6229
6230         $hash ||= $hash_base || "HEAD";
6231         my %co = parse_commit($hash)
6232             or die_error(404, "Unknown commit object");
6233
6234         # choose format for commitdiff for merge
6235         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6236                 $hash_parent = '--cc';
6237         }
6238         # we need to prepare $formats_nav before almost any parameter munging
6239         my $formats_nav;
6240         if ($format eq 'html') {
6241                 $formats_nav =
6242                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6243                                 "raw");
6244                 if ($patch_max && @{$co{'parents'}} <= 1) {
6245                         $formats_nav .= " | " .
6246                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6247                                         "patch");
6248                 }
6249
6250                 if (defined $hash_parent &&
6251                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6252                         # commitdiff with two commits given
6253                         my $hash_parent_short = $hash_parent;
6254                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6255                                 $hash_parent_short = substr($hash_parent, 0, 7);
6256                         }
6257                         $formats_nav .=
6258                                 ' (from';
6259                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6260                                 if ($co{'parents'}[$i] eq $hash_parent) {
6261                                         $formats_nav .= ' parent ' . ($i+1);
6262                                         last;
6263                                 }
6264                         }
6265                         $formats_nav .= ': ' .
6266                                 $cgi->a({-href => href(action=>"commitdiff",
6267                                                        hash=>$hash_parent)},
6268                                         esc_html($hash_parent_short)) .
6269                                 ')';
6270                 } elsif (!$co{'parent'}) {
6271                         # --root commitdiff
6272                         $formats_nav .= ' (initial)';
6273                 } elsif (scalar @{$co{'parents'}} == 1) {
6274                         # single parent commit
6275                         $formats_nav .=
6276                                 ' (parent: ' .
6277                                 $cgi->a({-href => href(action=>"commitdiff",
6278                                                        hash=>$co{'parent'})},
6279                                         esc_html(substr($co{'parent'}, 0, 7))) .
6280                                 ')';
6281                 } else {
6282                         # merge commit
6283                         if ($hash_parent eq '--cc') {
6284                                 $formats_nav .= ' | ' .
6285                                         $cgi->a({-href => href(action=>"commitdiff",
6286                                                                hash=>$hash, hash_parent=>'-c')},
6287                                                 'combined');
6288                         } else { # $hash_parent eq '-c'
6289                                 $formats_nav .= ' | ' .
6290                                         $cgi->a({-href => href(action=>"commitdiff",
6291                                                                hash=>$hash, hash_parent=>'--cc')},
6292                                                 'compact');
6293                         }
6294                         $formats_nav .=
6295                                 ' (merge: ' .
6296                                 join(' ', map {
6297                                         $cgi->a({-href => href(action=>"commitdiff",
6298                                                                hash=>$_)},
6299                                                 esc_html(substr($_, 0, 7)));
6300                                 } @{$co{'parents'}} ) .
6301                                 ')';
6302                 }
6303         }
6304
6305         my $hash_parent_param = $hash_parent;
6306         if (!defined $hash_parent_param) {
6307                 # --cc for multiple parents, --root for parentless
6308                 $hash_parent_param =
6309                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6310         }
6311
6312         # read commitdiff
6313         my $fd;
6314         my @difftree;
6315         if ($format eq 'html') {
6316                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6317                         "--no-commit-id", "--patch-with-raw", "--full-index",
6318                         $hash_parent_param, $hash, "--"
6319                         or die_error(500, "Open git-diff-tree failed");
6320
6321                 while (my $line = <$fd>) {
6322                         chomp $line;
6323                         # empty line ends raw part of diff-tree output
6324                         last unless $line;
6325                         push @difftree, scalar parse_difftree_raw_line($line);
6326                 }
6327
6328         } elsif ($format eq 'plain') {
6329                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6330                         '-p', $hash_parent_param, $hash, "--"
6331                         or die_error(500, "Open git-diff-tree failed");
6332         } elsif ($format eq 'patch') {
6333                 # For commit ranges, we limit the output to the number of
6334                 # patches specified in the 'patches' feature.
6335                 # For single commits, we limit the output to a single patch,
6336                 # diverging from the git-format-patch default.
6337                 my @commit_spec = ();
6338                 if ($hash_parent) {
6339                         if ($patch_max > 0) {
6340                                 push @commit_spec, "-$patch_max";
6341                         }
6342                         push @commit_spec, '-n', "$hash_parent..$hash";
6343                 } else {
6344                         if ($params{-single}) {
6345                                 push @commit_spec, '-1';
6346                         } else {
6347                                 if ($patch_max > 0) {
6348                                         push @commit_spec, "-$patch_max";
6349                                 }
6350                                 push @commit_spec, "-n";
6351                         }
6352                         push @commit_spec, '--root', $hash;
6353                 }
6354                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6355                         '--encoding=utf8', '--stdout', @commit_spec
6356                         or die_error(500, "Open git-format-patch failed");
6357         } else {
6358                 die_error(400, "Unknown commitdiff format");
6359         }
6360
6361         # non-textual hash id's can be cached
6362         my $expires;
6363         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6364                 $expires = "+1d";
6365         }
6366
6367         # write commit message
6368         if ($format eq 'html') {
6369                 my $refs = git_get_references();
6370                 my $ref = format_ref_marker($refs, $co{'id'});
6371
6372                 git_header_html(undef, $expires);
6373                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6374                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6375                 print "<div class=\"title_text\">\n" .
6376                       "<table class=\"object_header\">\n";
6377                 git_print_authorship_rows(\%co);
6378                 print "</table>".
6379                       "</div>\n";
6380                 print "<div class=\"page_body\">\n";
6381                 if (@{$co{'comment'}} > 1) {
6382                         print "<div class=\"log\">\n";
6383                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6384                         print "</div>\n"; # class="log"
6385                 }
6386
6387         } elsif ($format eq 'plain') {
6388                 my $refs = git_get_references("tags");
6389                 my $tagname = git_get_rev_name_tags($hash);
6390                 my $filename = basename($project) . "-$hash.patch";
6391
6392                 print $cgi->header(
6393                         -type => 'text/plain',
6394                         -charset => 'utf-8',
6395                         -expires => $expires,
6396                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6397                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6398                 print "From: " . to_utf8($co{'author'}) . "\n";
6399                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6400                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6401
6402                 print "X-Git-Tag: $tagname\n" if $tagname;
6403                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6404
6405                 foreach my $line (@{$co{'comment'}}) {
6406                         print to_utf8($line) . "\n";
6407                 }
6408                 print "---\n\n";
6409         } elsif ($format eq 'patch') {
6410                 my $filename = basename($project) . "-$hash.patch";
6411
6412                 print $cgi->header(
6413                         -type => 'text/plain',
6414                         -charset => 'utf-8',
6415                         -expires => $expires,
6416                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6417         }
6418
6419         # write patch
6420         if ($format eq 'html') {
6421                 my $use_parents = !defined $hash_parent ||
6422                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6423                 git_difftree_body(\@difftree, $hash,
6424                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6425                 print "<br/>\n";
6426
6427                 git_patchset_body($fd, \@difftree, $hash,
6428                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6429                 close $fd;
6430                 print "</div>\n"; # class="page_body"
6431                 git_footer_html();
6432
6433         } elsif ($format eq 'plain') {
6434                 local $/ = undef;
6435                 print <$fd>;
6436                 close $fd
6437                         or print "Reading git-diff-tree failed\n";
6438         } elsif ($format eq 'patch') {
6439                 local $/ = undef;
6440                 print <$fd>;
6441                 close $fd
6442                         or print "Reading git-format-patch failed\n";
6443         }
6444 }
6445
6446 sub git_commitdiff_plain {
6447         git_commitdiff(-format => 'plain');
6448 }
6449
6450 # format-patch-style patches
6451 sub git_patch {
6452         git_commitdiff(-format => 'patch', -single => 1);
6453 }
6454
6455 sub git_patches {
6456         git_commitdiff(-format => 'patch');
6457 }
6458
6459 sub git_history {
6460         git_log_generic('history', \&git_history_body,
6461                         $hash_base, $hash_parent_base,
6462                         $file_name, $hash);
6463 }
6464
6465 sub git_search {
6466         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6467         if (!defined $searchtext) {
6468                 die_error(400, "Text field is empty");
6469         }
6470         if (!defined $hash) {
6471                 $hash = git_get_head_hash($project);
6472         }
6473         my %co = parse_commit($hash);
6474         if (!%co) {
6475                 die_error(404, "Unknown commit object");
6476         }
6477         if (!defined $page) {
6478                 $page = 0;
6479         }
6480
6481         $searchtype ||= 'commit';
6482         if ($searchtype eq 'pickaxe') {
6483                 # pickaxe may take all resources of your box and run for several minutes
6484                 # with every query - so decide by yourself how public you make this feature
6485                 gitweb_check_feature('pickaxe')
6486                     or die_error(403, "Pickaxe is disabled");
6487         }
6488         if ($searchtype eq 'grep') {
6489                 gitweb_check_feature('grep')[0]
6490                     or die_error(403, "Grep is disabled");
6491         }
6492
6493         git_header_html();
6494
6495         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6496                 my $greptype;
6497                 if ($searchtype eq 'commit') {
6498                         $greptype = "--grep=";
6499                 } elsif ($searchtype eq 'author') {
6500                         $greptype = "--author=";
6501                 } elsif ($searchtype eq 'committer') {
6502                         $greptype = "--committer=";
6503                 }
6504                 $greptype .= $searchtext;
6505                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6506                                                $greptype, '--regexp-ignore-case',
6507                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6508
6509                 my $paging_nav = '';
6510                 if ($page > 0) {
6511                         $paging_nav .=
6512                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6513                                                        searchtext=>$searchtext,
6514                                                        searchtype=>$searchtype)},
6515                                         "first");
6516                         $paging_nav .= " &sdot; " .
6517                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6518                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6519                 } else {
6520                         $paging_nav .= "first";
6521                         $paging_nav .= " &sdot; prev";
6522                 }
6523                 my $next_link = '';
6524                 if ($#commitlist >= 100) {
6525                         $next_link =
6526                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6527                                          -accesskey => "n", -title => "Alt-n"}, "next");
6528                         $paging_nav .= " &sdot; $next_link";
6529                 } else {
6530                         $paging_nav .= " &sdot; next";
6531                 }
6532
6533                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6534                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6535                 if ($page == 0 && !@commitlist) {
6536                         print "<p>No match.</p>\n";
6537                 } else {
6538                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6539                 }
6540         }
6541
6542         if ($searchtype eq 'pickaxe') {
6543                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6544                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6545
6546                 print "<table class=\"pickaxe search\">\n";
6547                 my $alternate = 1;
6548                 local $/ = "\n";
6549                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6550                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6551                         ($search_use_regexp ? '--pickaxe-regex' : ());
6552                 undef %co;
6553                 my @files;
6554                 while (my $line = <$fd>) {
6555                         chomp $line;
6556                         next unless $line;
6557
6558                         my %set = parse_difftree_raw_line($line);
6559                         if (defined $set{'commit'}) {
6560                                 # finish previous commit
6561                                 if (%co) {
6562                                         print "</td>\n" .
6563                                               "<td class=\"link\">" .
6564                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6565                                               " | " .
6566                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6567                                         print "</td>\n" .
6568                                               "</tr>\n";
6569                                 }
6570
6571                                 if ($alternate) {
6572                                         print "<tr class=\"dark\">\n";
6573                                 } else {
6574                                         print "<tr class=\"light\">\n";
6575                                 }
6576                                 $alternate ^= 1;
6577                                 %co = parse_commit($set{'commit'});
6578                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6579                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6580                                       "<td><i>$author</i></td>\n" .
6581                                       "<td>" .
6582                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6583                                               -class => "list subject"},
6584                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6585                         } elsif (defined $set{'to_id'}) {
6586                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6587
6588                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6589                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6590                                               -class => "list"},
6591                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6592                                       "<br/>\n";
6593                         }
6594                 }
6595                 close $fd;
6596
6597                 # finish last commit (warning: repetition!)
6598                 if (%co) {
6599                         print "</td>\n" .
6600                               "<td class=\"link\">" .
6601                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6602                               " | " .
6603                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6604                         print "</td>\n" .
6605                               "</tr>\n";
6606                 }
6607
6608                 print "</table>\n";
6609         }
6610
6611         if ($searchtype eq 'grep') {
6612                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6613                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6614
6615                 print "<table class=\"grep_search\">\n";
6616                 my $alternate = 1;
6617                 my $matches = 0;
6618                 local $/ = "\n";
6619                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6620                         $search_use_regexp ? ('-E', '-i') : '-F',
6621                         $searchtext, $co{'tree'};
6622                 my $lastfile = '';
6623                 while (my $line = <$fd>) {
6624                         chomp $line;
6625                         my ($file, $lno, $ltext, $binary);
6626                         last if ($matches++ > 1000);
6627                         if ($line =~ /^Binary file (.+) matches$/) {
6628                                 $file = $1;
6629                                 $binary = 1;
6630                         } else {
6631                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6632                         }
6633                         if ($file ne $lastfile) {
6634                                 $lastfile and print "</td></tr>\n";
6635                                 if ($alternate++) {
6636                                         print "<tr class=\"dark\">\n";
6637                                 } else {
6638                                         print "<tr class=\"light\">\n";
6639                                 }
6640                                 print "<td class=\"list\">".
6641                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6642                                                                file_name=>"$file"),
6643                                                 -class => "list"}, esc_path($file));
6644                                 print "</td><td>\n";
6645                                 $lastfile = $file;
6646                         }
6647                         if ($binary) {
6648                                 print "<div class=\"binary\">Binary file</div>\n";
6649                         } else {
6650                                 $ltext = untabify($ltext);
6651                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6652                                         $ltext = esc_html($1, -nbsp=>1);
6653                                         $ltext .= '<span class="match">';
6654                                         $ltext .= esc_html($2, -nbsp=>1);
6655                                         $ltext .= '</span>';
6656                                         $ltext .= esc_html($3, -nbsp=>1);
6657                                 } else {
6658                                         $ltext = esc_html($ltext, -nbsp=>1);
6659                                 }
6660                                 print "<div class=\"pre\">" .
6661                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6662                                                                file_name=>"$file").'#l'.$lno,
6663                                                 -class => "linenr"}, sprintf('%4i', $lno))
6664                                         . ' ' .  $ltext . "</div>\n";
6665                         }
6666                 }
6667                 if ($lastfile) {
6668                         print "</td></tr>\n";
6669                         if ($matches > 1000) {
6670                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6671                         }
6672                 } else {
6673                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6674                 }
6675                 close $fd;
6676
6677                 print "</table>\n";
6678         }
6679         git_footer_html();
6680 }
6681
6682 sub git_search_help {
6683         git_header_html();
6684         git_print_page_nav('','', $hash,$hash,$hash);
6685         print <<EOT;
6686 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6687 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6688 the pattern entered is recognized as the POSIX extended
6689 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6690 insensitive).</p>
6691 <dl>
6692 <dt><b>commit</b></dt>
6693 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6694 EOT
6695         my $have_grep = gitweb_check_feature('grep');
6696         if ($have_grep) {
6697                 print <<EOT;
6698 <dt><b>grep</b></dt>
6699 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6700     a different one) are searched for the given pattern. On large trees, this search can take
6701 a while and put some strain on the server, so please use it with some consideration. Note that
6702 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6703 case-sensitive.</dd>
6704 EOT
6705         }
6706         print <<EOT;
6707 <dt><b>author</b></dt>
6708 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6709 <dt><b>committer</b></dt>
6710 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6711 EOT
6712         my $have_pickaxe = gitweb_check_feature('pickaxe');
6713         if ($have_pickaxe) {
6714                 print <<EOT;
6715 <dt><b>pickaxe</b></dt>
6716 <dd>All commits that caused the string to appear or disappear from any file (changes that
6717 added, removed or "modified" the string) will be listed. This search can take a while and
6718 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6719 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6720 EOT
6721         }
6722         print "</dl>\n";
6723         git_footer_html();
6724 }
6725
6726 sub git_shortlog {
6727         git_log_generic('shortlog', \&git_shortlog_body,
6728                         $hash, $hash_parent);
6729 }
6730
6731 ## ......................................................................
6732 ## feeds (RSS, Atom; OPML)
6733
6734 sub git_feed {
6735         my $format = shift || 'atom';
6736         my $have_blame = gitweb_check_feature('blame');
6737
6738         # Atom: http://www.atomenabled.org/developers/syndication/
6739         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6740         if ($format ne 'rss' && $format ne 'atom') {
6741                 die_error(400, "Unknown web feed format");
6742         }
6743
6744         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6745         my $head = $hash || 'HEAD';
6746         my @commitlist = parse_commits($head, 150, 0, $file_name);
6747
6748         my %latest_commit;
6749         my %latest_date;
6750         my $content_type = "application/$format+xml";
6751         if (defined $cgi->http('HTTP_ACCEPT') &&
6752                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6753                 # browser (feed reader) prefers text/xml
6754                 $content_type = 'text/xml';
6755         }
6756         if (defined($commitlist[0])) {
6757                 %latest_commit = %{$commitlist[0]};
6758                 my $latest_epoch = $latest_commit{'committer_epoch'};
6759                 %latest_date   = parse_date($latest_epoch);
6760                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6761                 if (defined $if_modified) {
6762                         my $since;
6763                         if (eval { require HTTP::Date; 1; }) {
6764                                 $since = HTTP::Date::str2time($if_modified);
6765                         } elsif (eval { require Time::ParseDate; 1; }) {
6766                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6767                         }
6768                         if (defined $since && $latest_epoch <= $since) {
6769                                 print $cgi->header(
6770                                         -type => $content_type,
6771                                         -charset => 'utf-8',
6772                                         -last_modified => $latest_date{'rfc2822'},
6773                                         -status => '304 Not Modified');
6774                                 return;
6775                         }
6776                 }
6777                 print $cgi->header(
6778                         -type => $content_type,
6779                         -charset => 'utf-8',
6780                         -last_modified => $latest_date{'rfc2822'});
6781         } else {
6782                 print $cgi->header(
6783                         -type => $content_type,
6784                         -charset => 'utf-8');
6785         }
6786
6787         # Optimization: skip generating the body if client asks only
6788         # for Last-Modified date.
6789         return if ($cgi->request_method() eq 'HEAD');
6790
6791         # header variables
6792         my $title = "$site_name - $project/$action";
6793         my $feed_type = 'log';
6794         if (defined $hash) {
6795                 $title .= " - '$hash'";
6796                 $feed_type = 'branch log';
6797                 if (defined $file_name) {
6798                         $title .= " :: $file_name";
6799                         $feed_type = 'history';
6800                 }
6801         } elsif (defined $file_name) {
6802                 $title .= " - $file_name";
6803                 $feed_type = 'history';
6804         }
6805         $title .= " $feed_type";
6806         my $descr = git_get_project_description($project);
6807         if (defined $descr) {
6808                 $descr = esc_html($descr);
6809         } else {
6810                 $descr = "$project " .
6811                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6812                          " feed";
6813         }
6814         my $owner = git_get_project_owner($project);
6815         $owner = esc_html($owner);
6816
6817         #header
6818         my $alt_url;
6819         if (defined $file_name) {
6820                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6821         } elsif (defined $hash) {
6822                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6823         } else {
6824                 $alt_url = href(-full=>1, action=>"summary");
6825         }
6826         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6827         if ($format eq 'rss') {
6828                 print <<XML;
6829 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6830 <channel>
6831 XML
6832                 print "<title>$title</title>\n" .
6833                       "<link>$alt_url</link>\n" .
6834                       "<description>$descr</description>\n" .
6835                       "<language>en</language>\n" .
6836                       # project owner is responsible for 'editorial' content
6837                       "<managingEditor>$owner</managingEditor>\n";
6838                 if (defined $logo || defined $favicon) {
6839                         # prefer the logo to the favicon, since RSS
6840                         # doesn't allow both
6841                         my $img = esc_url($logo || $favicon);
6842                         print "<image>\n" .
6843                               "<url>$img</url>\n" .
6844                               "<title>$title</title>\n" .
6845                               "<link>$alt_url</link>\n" .
6846                               "</image>\n";
6847                 }
6848                 if (%latest_date) {
6849                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6850                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6851                 }
6852                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6853         } elsif ($format eq 'atom') {
6854                 print <<XML;
6855 <feed xmlns="http://www.w3.org/2005/Atom">
6856 XML
6857                 print "<title>$title</title>\n" .
6858                       "<subtitle>$descr</subtitle>\n" .
6859                       '<link rel="alternate" type="text/html" href="' .
6860                       $alt_url . '" />' . "\n" .
6861                       '<link rel="self" type="' . $content_type . '" href="' .
6862                       $cgi->self_url() . '" />' . "\n" .
6863                       "<id>" . href(-full=>1) . "</id>\n" .
6864                       # use project owner for feed author
6865                       "<author><name>$owner</name></author>\n";
6866                 if (defined $favicon) {
6867                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6868                 }
6869                 if (defined $logo_url) {
6870                         # not twice as wide as tall: 72 x 27 pixels
6871                         print "<logo>" . esc_url($logo) . "</logo>\n";
6872                 }
6873                 if (! %latest_date) {
6874                         # dummy date to keep the feed valid until commits trickle in:
6875                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6876                 } else {
6877                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6878                 }
6879                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6880         }
6881
6882         # contents
6883         for (my $i = 0; $i <= $#commitlist; $i++) {
6884                 my %co = %{$commitlist[$i]};
6885                 my $commit = $co{'id'};
6886                 # we read 150, we always show 30 and the ones more recent than 48 hours
6887                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6888                         last;
6889                 }
6890                 my %cd = parse_date($co{'author_epoch'});
6891
6892                 # get list of changed files
6893                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6894                         $co{'parent'} || "--root",
6895                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6896                         or next;
6897                 my @difftree = map { chomp; $_ } <$fd>;
6898                 close $fd
6899                         or next;
6900
6901                 # print element (entry, item)
6902                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6903                 if ($format eq 'rss') {
6904                         print "<item>\n" .
6905                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6906                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6907                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6908                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6909                               "<link>$co_url</link>\n" .
6910                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6911                               "<content:encoded>" .
6912                               "<![CDATA[\n";
6913                 } elsif ($format eq 'atom') {
6914                         print "<entry>\n" .
6915                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6916                               "<updated>$cd{'iso-8601'}</updated>\n" .
6917                               "<author>\n" .
6918                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6919                         if ($co{'author_email'}) {
6920                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6921                         }
6922                         print "</author>\n" .
6923                               # use committer for contributor
6924                               "<contributor>\n" .
6925                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6926                         if ($co{'committer_email'}) {
6927                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6928                         }
6929                         print "</contributor>\n" .
6930                               "<published>$cd{'iso-8601'}</published>\n" .
6931                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6932                               "<id>$co_url</id>\n" .
6933                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6934                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6935                 }
6936                 my $comment = $co{'comment'};
6937                 print "<pre>\n";
6938                 foreach my $line (@$comment) {
6939                         $line = esc_html($line);
6940                         print "$line\n";
6941                 }
6942                 print "</pre><ul>\n";
6943                 foreach my $difftree_line (@difftree) {
6944                         my %difftree = parse_difftree_raw_line($difftree_line);
6945                         next if !$difftree{'from_id'};
6946
6947                         my $file = $difftree{'file'} || $difftree{'to_file'};
6948
6949                         print "<li>" .
6950                               "[" .
6951                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6952                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6953                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6954                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6955                                       -title => "diff"}, 'D');
6956                         if ($have_blame) {
6957                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6958                                                              file_name=>$file, hash_base=>$commit),
6959                                               -title => "blame"}, 'B');
6960                         }
6961                         # if this is not a feed of a file history
6962                         if (!defined $file_name || $file_name ne $file) {
6963                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6964                                                              file_name=>$file, hash=>$commit),
6965                                               -title => "history"}, 'H');
6966                         }
6967                         $file = esc_path($file);
6968                         print "] ".
6969                               "$file</li>\n";
6970                 }
6971                 if ($format eq 'rss') {
6972                         print "</ul>]]>\n" .
6973                               "</content:encoded>\n" .
6974                               "</item>\n";
6975                 } elsif ($format eq 'atom') {
6976                         print "</ul>\n</div>\n" .
6977                               "</content>\n" .
6978                               "</entry>\n";
6979                 }
6980         }
6981
6982         # end of feed
6983         if ($format eq 'rss') {
6984                 print "</channel>\n</rss>\n";
6985         } elsif ($format eq 'atom') {
6986                 print "</feed>\n";
6987         }
6988 }
6989
6990 sub git_rss {
6991         git_feed('rss');
6992 }
6993
6994 sub git_atom {
6995         git_feed('atom');
6996 }
6997
6998 sub git_opml {
6999         my @list = git_get_projects_list();
7000
7001         print $cgi->header(
7002                 -type => 'text/xml',
7003                 -charset => 'utf-8',
7004                 -content_disposition => 'inline; filename="opml.xml"');
7005
7006         print <<XML;
7007 <?xml version="1.0" encoding="utf-8"?>
7008 <opml version="1.0">
7009 <head>
7010   <title>$site_name OPML Export</title>
7011 </head>
7012 <body>
7013 <outline text="git RSS feeds">
7014 XML
7015
7016         foreach my $pr (@list) {
7017                 my %proj = %$pr;
7018                 my $head = git_get_head_hash($proj{'path'});
7019                 if (!defined $head) {
7020                         next;
7021                 }
7022                 $git_dir = "$projectroot/$proj{'path'}";
7023                 my %co = parse_commit($head);
7024                 if (!%co) {
7025                         next;
7026                 }
7027
7028                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7029                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7030                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7031                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7032         }
7033         print <<XML;
7034 </outline>
7035 </body>
7036 </opml>
7037 XML
7038 }