gitweb/gitweb.perl

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