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 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # default order of projects list
 119 # valid values are none, project, descr, owner, and age
 120 our $default_projects_order = "project";
 121
 122 # show repository only if this file exists
 123 # (only effective if this variable evaluates to true)
 124 our $export_ok = "++GITWEB_EXPORT_OK++";
 125
 126 # show repository only if this subroutine returns true
 127 # when given the path to the project, for example:
 128 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 129 our $export_auth_hook = undef;
 130
 131 # only allow viewing of repositories also shown on the overview page
 132 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 133
 134 # list of git base URLs used for URL to where fetch project from,
 135 # i.e. full URL is "$git_base_url/$project"
 136 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 137
 138 # default blob_plain mimetype and default charset for text/plain blob
 139 our $default_blob_plain_mimetype = 'text/plain';
 140 our $default_text_plain_charset  = undef;
 141
 142 # file to use for guessing MIME types before trying /etc/mime.types
 143 # (relative to the current git repository)
 144 our $mimetypes_file = undef;
 145
 146 # assume this charset if line contains non-UTF-8 characters;
 147 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 148 # for which encoding all byte sequences are valid, for example
 149 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 150 # could be even 'utf-8' for the old behavior)
 151 our $fallback_encoding = 'latin1';
 152
 153 # rename detection options for git-diff and git-diff-tree
 154 # - default is '-M', with the cost proportional to
 155 #   (number of removed files) * (number of new files).
 156 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 157 #   (number of changed files + number of removed files) * (number of new files)
 158 # - even more costly is '-C', '--find-copies-harder' with cost
 159 #   (number of files in the original tree) * (number of new files)
 160 # - one might want to include '-B' option, e.g. '-B', '-M'
 161 our @diff_opts = ('-M'); # taken from git_commit
 162
 163 # Disables features that would allow repository owners to inject script into
 164 # the gitweb domain.
 165 our $prevent_xss = 0;
 166
 167 # Path to the highlight executable to use (must be the one from
 168 # http://www.andre-simon.de due to assumptions about parameters and output).
 169 # Useful if highlight is not installed on your webserver's PATH.
 170 # [Default: highlight]
 171 our $highlight_bin = "++HIGHLIGHT_BIN++";
 172
 173 # information about snapshot formats that gitweb is capable of serving
 174 our %known_snapshot_formats = (
 175         # name => {
 176         #       'display' => display name,
 177         #       'type' => mime type,
 178         #       'suffix' => filename suffix,
 179         #       'format' => --format for git-archive,
 180         #       'compressor' => [compressor command and arguments]
 181         #                       (array reference, optional)
 182         #       'disabled' => boolean (optional)}
 183         #
 184         'tgz' => {
 185                 'display' => 'tar.gz',
 186                 'type' => 'application/x-gzip',
 187                 'suffix' => '.tar.gz',
 188                 'format' => 'tar',
 189                 'compressor' => ['gzip']},
 190
 191         'tbz2' => {
 192                 'display' => 'tar.bz2',
 193                 'type' => 'application/x-bzip2',
 194                 'suffix' => '.tar.bz2',
 195                 'format' => 'tar',
 196                 'compressor' => ['bzip2']},
 197
 198         'txz' => {
 199                 'display' => 'tar.xz',
 200                 'type' => 'application/x-xz',
 201                 'suffix' => '.tar.xz',
 202                 'format' => 'tar',
 203                 'compressor' => ['xz'],
 204                 'disabled' => 1},
 205
 206         'zip' => {
 207                 'display' => 'zip',
 208                 'type' => 'application/x-zip',
 209                 'suffix' => '.zip',
 210                 'format' => 'zip'},
 211 );
 212
 213 # Aliases so we understand old gitweb.snapshot values in repository
 214 # configuration.
 215 our %known_snapshot_format_aliases = (
 216         'gzip'  => 'tgz',
 217         'bzip2' => 'tbz2',
 218         'xz'    => 'txz',
 219
 220         # backward compatibility: legacy gitweb config support
 221         'x-gzip' => undef, 'gz' => undef,
 222         'x-bzip2' => undef, 'bz2' => undef,
 223         'x-zip' => undef, '' => undef,
 224 );
 225
 226 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 227 # are changed, it may be appropriate to change these values too via
 228 # $GITWEB_CONFIG.
 229 our %avatar_size = (
 230         'default' => 16,
 231         'double'  => 32
 232 );
 233
 234 # Used to set the maximum load that we will still respond to gitweb queries.
 235 # If server load exceed this value then return "503 server busy" error.
 236 # If gitweb cannot determined server load, it is taken to be 0.
 237 # Leave it undefined (or set to 'undef') to turn off load checking.
 238 our $maxload = 300;
 239
 240 # configuration for 'highlight' (http://www.andre-simon.de/)
 241 # match by basename
 242 our %highlight_basename = (
 243         #'Program' => 'py',
 244         #'Library' => 'py',
 245         'SConstruct' => 'py', # SCons equivalent of Makefile
 246         'Makefile' => 'make',
 247 );
 248 # match by extension
 249 our %highlight_ext = (
 250         # main extensions, defining name of syntax;
 251         # see files in /usr/share/highlight/langDefs/ directory
 252         map { $_ => $_ }
 253                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 254         # alternate extensions, see /etc/highlight/filetypes.conf
 255         'h' => 'c',
 256         map { $_ => 'cpp' } qw(cxx c++ cc),
 257         map { $_ => 'php' } qw(php3 php4),
 258         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 259         'mak' => 'make',
 260         map { $_ => 'xml' } qw(xhtml html htm),
 261 );
 262
 263 # You define site-wide feature defaults here; override them with
 264 # $GITWEB_CONFIG as necessary.
 265 our %feature = (
 266         # feature => {
 267         #       'sub' => feature-sub (subroutine),
 268         #       'override' => allow-override (boolean),
 269         #       'default' => [ default options...] (array reference)}
 270         #
 271         # if feature is overridable (it means that allow-override has true value),
 272         # then feature-sub will be called with default options as parameters;
 273         # return value of feature-sub indicates if to enable specified feature
 274         #
 275         # if there is no 'sub' key (no feature-sub), then feature cannot be
 276         # overridden
 277         #
 278         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 279         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 280         # is enabled
 281
 282         # Enable the 'blame' blob view, showing the last commit that modified
 283         # each line in the file. This can be very CPU-intensive.
 284
 285         # To enable system wide have in $GITWEB_CONFIG
 286         # $feature{'blame'}{'default'} = [1];
 287         # To have project specific config enable override in $GITWEB_CONFIG
 288         # $feature{'blame'}{'override'} = 1;
 289         # and in project config gitweb.blame = 0|1;
 290         'blame' => {
 291                 'sub' => sub { feature_bool('blame', @_) },
 292                 'override' => 0,
 293                 'default' => [0]},
 294
 295         # Enable the 'snapshot' link, providing a compressed archive of any
 296         # tree. This can potentially generate high traffic if you have large
 297         # project.
 298
 299         # Value is a list of formats defined in %known_snapshot_formats that
 300         # you wish to offer.
 301         # To disable system wide have in $GITWEB_CONFIG
 302         # $feature{'snapshot'}{'default'} = [];
 303         # To have project specific config enable override in $GITWEB_CONFIG
 304         # $feature{'snapshot'}{'override'} = 1;
 305         # and in project config, a comma-separated list of formats or "none"
 306         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 307         'snapshot' => {
 308                 'sub' => \&feature_snapshot,
 309                 'override' => 0,
 310                 'default' => ['tgz']},
 311
 312         # Enable text search, which will list the commits which match author,
 313         # committer or commit text to a given string.  Enabled by default.
 314         # Project specific override is not supported.
 315         'search' => {
 316                 'override' => 0,
 317                 'default' => [1]},
 318
 319         # Enable grep search, which will list the files in currently selected
 320         # tree containing the given string. Enabled by default. This can be
 321         # potentially CPU-intensive, of course.
 322
 323         # To enable system wide have in $GITWEB_CONFIG
 324         # $feature{'grep'}{'default'} = [1];
 325         # To have project specific config enable override in $GITWEB_CONFIG
 326         # $feature{'grep'}{'override'} = 1;
 327         # and in project config gitweb.grep = 0|1;
 328         'grep' => {
 329                 'sub' => sub { feature_bool('grep', @_) },
 330                 'override' => 0,
 331                 'default' => [1]},
 332
 333         # Enable the pickaxe search, which will list the commits that modified
 334         # a given string in a file. This can be practical and quite faster
 335         # alternative to 'blame', but still potentially CPU-intensive.
 336
 337         # To enable system wide have in $GITWEB_CONFIG
 338         # $feature{'pickaxe'}{'default'} = [1];
 339         # To have project specific config enable override in $GITWEB_CONFIG
 340         # $feature{'pickaxe'}{'override'} = 1;
 341         # and in project config gitweb.pickaxe = 0|1;
 342         'pickaxe' => {
 343                 'sub' => sub { feature_bool('pickaxe', @_) },
 344                 'override' => 0,
 345                 'default' => [1]},
 346
 347         # Enable showing size of blobs in a 'tree' view, in a separate
 348         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 349
 350         # To disable system wide have in $GITWEB_CONFIG
 351         # $feature{'show-sizes'}{'default'} = [0];
 352         # To have project specific config enable override in $GITWEB_CONFIG
 353         # $feature{'show-sizes'}{'override'} = 1;
 354         # and in project config gitweb.showsizes = 0|1;
 355         'show-sizes' => {
 356                 'sub' => sub { feature_bool('showsizes', @_) },
 357                 'override' => 0,
 358                 'default' => [1]},
 359
 360         # Make gitweb use an alternative format of the URLs which can be
 361         # more readable and natural-looking: project name is embedded
 362         # directly in the path and the query string contains other
 363         # auxiliary information. All gitweb installations recognize
 364         # URL in either format; this configures in which formats gitweb
 365         # generates links.
 366
 367         # To enable system wide have in $GITWEB_CONFIG
 368         # $feature{'pathinfo'}{'default'} = [1];
 369         # Project specific override is not supported.
 370
 371         # Note that you will need to change the default location of CSS,
 372         # favicon, logo and possibly other files to an absolute URL. Also,
 373         # if gitweb.cgi serves as your indexfile, you will need to force
 374         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 375         'pathinfo' => {
 376                 'override' => 0,
 377                 'default' => [0]},
 378
 379         # Make gitweb consider projects in project root subdirectories
 380         # to be forks of existing projects. Given project $projname.git,
 381         # projects matching $projname/*.git will not be shown in the main
 382         # projects list, instead a '+' mark will be added to $projname
 383         # there and a 'forks' view will be enabled for the project, listing
 384         # all the forks. If project list is taken from a file, forks have
 385         # to be listed after the main project.
 386
 387         # To enable system wide have in $GITWEB_CONFIG
 388         # $feature{'forks'}{'default'} = [1];
 389         # Project specific override is not supported.
 390         'forks' => {
 391                 'override' => 0,
 392                 'default' => [0]},
 393
 394         # Insert custom links to the action bar of all project pages.
 395         # This enables you mainly to link to third-party scripts integrating
 396         # into gitweb; e.g. git-browser for graphical history representation
 397         # or custom web-based repository administration interface.
 398
 399         # The 'default' value consists of a list of triplets in the form
 400         # (label, link, position) where position is the label after which
 401         # to insert the link and link is a format string where %n expands
 402         # to the project name, %f to the project path within the filesystem,
 403         # %h to the current hash (h gitweb parameter) and %b to the current
 404         # hash base (hb gitweb parameter); %% expands to %.
 405
 406         # To enable system wide have in $GITWEB_CONFIG e.g.
 407         # $feature{'actions'}{'default'} = [('graphiclog',
 408         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 409         # Project specific override is not supported.
 410         'actions' => {
 411                 'override' => 0,
 412                 'default' => []},
 413
 414         # Allow gitweb scan project content tags described in ctags/
 415         # of project repository, and display the popular Web 2.0-ish
 416         # "tag cloud" near the project list. Note that this is something
 417         # COMPLETELY different from the normal Git tags.
 418
 419         # gitweb by itself can show existing tags, but it does not handle
 420         # tagging itself; you need an external application for that.
 421         # For an example script, check Girocco's cgi/tagproj.cgi.
 422         # You may want to install the HTML::TagCloud Perl module to get
 423         # a pretty tag cloud instead of just a list of tags.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 427         # Project specific override is not supported.
 428         'ctags' => {
 429                 'override' => 0,
 430                 'default' => [0]},
 431
 432         # The maximum number of patches in a patchset generated in patch
 433         # view. Set this to 0 or undef to disable patch view, or to a
 434         # negative number to remove any limit.
 435
 436         # To disable system wide have in $GITWEB_CONFIG
 437         # $feature{'patches'}{'default'} = [0];
 438         # To have project specific config enable override in $GITWEB_CONFIG
 439         # $feature{'patches'}{'override'} = 1;
 440         # and in project config gitweb.patches = 0|n;
 441         # where n is the maximum number of patches allowed in a patchset.
 442         'patches' => {
 443                 'sub' => \&feature_patches,
 444                 'override' => 0,
 445                 'default' => [16]},
 446
 447         # Avatar support. When this feature is enabled, views such as
 448         # shortlog or commit will display an avatar associated with
 449         # the email of the committer(s) and/or author(s).
 450
 451         # Currently available providers are gravatar and picon.
 452         # If an unknown provider is specified, the feature is disabled.
 453
 454         # Gravatar depends on Digest::MD5.
 455         # Picon currently relies on the indiana.edu database.
 456
 457         # To enable system wide have in $GITWEB_CONFIG
 458         # $feature{'avatar'}{'default'} = ['<provider>'];
 459         # where <provider> is either gravatar or picon.
 460         # To have project specific config enable override in $GITWEB_CONFIG
 461         # $feature{'avatar'}{'override'} = 1;
 462         # and in project config gitweb.avatar = <provider>;
 463         'avatar' => {
 464                 'sub' => \&feature_avatar,
 465                 'override' => 0,
 466                 'default' => ['']},
 467
 468         # Enable displaying how much time and how many git commands
 469         # it took to generate and display page.  Disabled by default.
 470         # Project specific override is not supported.
 471         'timed' => {
 472                 'override' => 0,
 473                 'default' => [0]},
 474
 475         # Enable turning some links into links to actions which require
 476         # JavaScript to run (like 'blame_incremental').  Not enabled by
 477         # default.  Project specific override is currently not supported.
 478         'javascript-actions' => {
 479                 'override' => 0,
 480                 'default' => [0]},
 481
 482         # Syntax highlighting support. This is based on Daniel Svensson's
 483         # and Sham Chukoury's work in gitweb-xmms2.git.
 484         # It requires the 'highlight' program present in $PATH,
 485         # and therefore is disabled by default.
 486
 487         # To enable system wide have in $GITWEB_CONFIG
 488         # $feature{'highlight'}{'default'} = [1];
 489
 490         'highlight' => {
 491                 'sub' => sub { feature_bool('highlight', @_) },
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable displaying of remote heads in the heads list
 496
 497         # To enable system wide have in $GITWEB_CONFIG
 498         # $feature{'remote_heads'}{'default'} = [1];
 499         # To have project specific config enable override in $GITWEB_CONFIG
 500         # $feature{'remote_heads'}{'override'} = 1;
 501         # and in project config gitweb.remote_heads = 0|1;
 502         'remote_heads' => {
 503                 'sub' => sub { feature_bool('remote_heads', @_) },
 504                 'override' => 0,
 505                 'default' => [0]},
 506 );
 507
 508 sub gitweb_get_feature {
 509         my ($name) = @_;
 510         return unless exists $feature{$name};
 511         my ($sub, $override, @defaults) = (
 512                 $feature{$name}{'sub'},
 513                 $feature{$name}{'override'},
 514                 @{$feature{$name}{'default'}});
 515         # project specific override is possible only if we have project
 516         our $git_dir; # global variable, declared later
 517         if (!$override || !defined $git_dir) {
 518                 return @defaults;
 519         }
 520         if (!defined $sub) {
 521                 warn "feature $name is not overridable";
 522                 return @defaults;
 523         }
 524         return $sub->(@defaults);
 525 }
 526
 527 # A wrapper to check if a given feature is enabled.
 528 # With this, you can say
 529 #
 530 #   my $bool_feat = gitweb_check_feature('bool_feat');
 531 #   gitweb_check_feature('bool_feat') or somecode;
 532 #
 533 # instead of
 534 #
 535 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 536 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 537 #
 538 sub gitweb_check_feature {
 539         return (gitweb_get_feature(@_))[0];
 540 }
 541
 542
 543 sub feature_bool {
 544         my $key = shift;
 545         my ($val) = git_get_project_config($key, '--bool');
 546
 547         if (!defined $val) {
 548                 return ($_[0]);
 549         } elsif ($val eq 'true') {
 550                 return (1);
 551         } elsif ($val eq 'false') {
 552                 return (0);
 553         }
 554 }
 555
 556 sub feature_snapshot {
 557         my (@fmts) = @_;
 558
 559         my ($val) = git_get_project_config('snapshot');
 560
 561         if ($val) {
 562                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 563         }
 564
 565         return @fmts;
 566 }
 567
 568 sub feature_patches {
 569         my @val = (git_get_project_config('patches', '--int'));
 570
 571         if (@val) {
 572                 return @val;
 573         }
 574
 575         return ($_[0]);
 576 }
 577
 578 sub feature_avatar {
 579         my @val = (git_get_project_config('avatar'));
 580
 581         return @val ? @val : @_;
 582 }
 583
 584 # checking HEAD file with -e is fragile if the repository was
 585 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 586 # and then pruned.
 587 sub check_head_link {
 588         my ($dir) = @_;
 589         my $headfile = "$dir/HEAD";
 590         return ((-e $headfile) ||
 591                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 592 }
 593
 594 sub check_export_ok {
 595         my ($dir) = @_;
 596         return (check_head_link($dir) &&
 597                 (!$export_ok || -e "$dir/$export_ok") &&
 598                 (!$export_auth_hook || $export_auth_hook->($dir)));
 599 }
 600
 601 # process alternate names for backward compatibility
 602 # filter out unsupported (unknown) snapshot formats
 603 sub filter_snapshot_fmts {
 604         my @fmts = @_;
 605
 606         @fmts = map {
 607                 exists $known_snapshot_format_aliases{$_} ?
 608                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 609         @fmts = grep {
 610                 exists $known_snapshot_formats{$_} &&
 611                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 612 }
 613
 614 # If it is set to code reference, it is code that it is to be run once per
 615 # request, allowing updating configurations that change with each request,
 616 # while running other code in config file only once.
 617 #
 618 # Otherwise, if it is false then gitweb would process config file only once;
 619 # if it is true then gitweb config would be run for each request.
 620 our $per_request_config = 1;
 621
 622 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 623 sub evaluate_gitweb_config {
 624         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 625         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 626         # die if there are errors parsing config file
 627         if (-e $GITWEB_CONFIG) {
 628                 do $GITWEB_CONFIG;
 629                 die $@ if $@;
 630         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 631                 do $GITWEB_CONFIG_SYSTEM;
 632                 die $@ if $@;
 633         }
 634 }
 635
 636 # Get loadavg of system, to compare against $maxload.
 637 # Currently it requires '/proc/loadavg' present to get loadavg;
 638 # if it is not present it returns 0, which means no load checking.
 639 sub get_loadavg {
 640         if( -e '/proc/loadavg' ){
 641                 open my $fd, '<', '/proc/loadavg'
 642                         or return 0;
 643                 my @load = split(/\s+/, scalar <$fd>);
 644                 close $fd;
 645
 646                 # The first three columns measure CPU and IO utilization of the last one,
 647                 # five, and 10 minute periods.  The fourth column shows the number of
 648                 # currently running processes and the total number of processes in the m/n
 649                 # format.  The last column displays the last process ID used.
 650                 return $load[0] || 0;
 651         }
 652         # additional checks for load average should go here for things that don't export
 653         # /proc/loadavg
 654
 655         return 0;
 656 }
 657
 658 # version of the core git binary
 659 our $git_version;
 660 sub evaluate_git_version {
 661         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 662         $number_of_git_cmds++;
 663 }
 664
 665 sub check_loadavg {
 666         if (defined $maxload && get_loadavg() > $maxload) {
 667                 die_error(503, "The load average on the server is too high");
 668         }
 669 }
 670
 671 # ======================================================================
 672 # input validation and dispatch
 673
 674 # input parameters can be collected from a variety of sources (presently, CGI
 675 # and PATH_INFO), so we define an %input_params hash that collects them all
 676 # together during validation: this allows subsequent uses (e.g. href()) to be
 677 # agnostic of the parameter origin
 678
 679 our %input_params = ();
 680
 681 # input parameters are stored with the long parameter name as key. This will
 682 # also be used in the href subroutine to convert parameters to their CGI
 683 # equivalent, and since the href() usage is the most frequent one, we store
 684 # the name -> CGI key mapping here, instead of the reverse.
 685 #
 686 # XXX: Warning: If you touch this, check the search form for updating,
 687 # too.
 688
 689 our @cgi_param_mapping = (
 690         project => "p",
 691         action => "a",
 692         file_name => "f",
 693         file_parent => "fp",
 694         hash => "h",
 695         hash_parent => "hp",
 696         hash_base => "hb",
 697         hash_parent_base => "hpb",
 698         page => "pg",
 699         order => "o",
 700         searchtext => "s",
 701         searchtype => "st",
 702         snapshot_format => "sf",
 703         extra_options => "opt",
 704         search_use_regexp => "sr",
 705         # this must be last entry (for manipulation from JavaScript)
 706         javascript => "js"
 707 );
 708 our %cgi_param_mapping = @cgi_param_mapping;
 709
 710 # we will also need to know the possible actions, for validation
 711 our %actions = (
 712         "blame" => \&git_blame,
 713         "blame_incremental" => \&git_blame_incremental,
 714         "blame_data" => \&git_blame_data,
 715         "blobdiff" => \&git_blobdiff,
 716         "blobdiff_plain" => \&git_blobdiff_plain,
 717         "blob" => \&git_blob,
 718         "blob_plain" => \&git_blob_plain,
 719         "commitdiff" => \&git_commitdiff,
 720         "commitdiff_plain" => \&git_commitdiff_plain,
 721         "commit" => \&git_commit,
 722         "forks" => \&git_forks,
 723         "heads" => \&git_heads,
 724         "history" => \&git_history,
 725         "log" => \&git_log,
 726         "patch" => \&git_patch,
 727         "patches" => \&git_patches,
 728         "remotes" => \&git_remotes,
 729         "rss" => \&git_rss,
 730         "atom" => \&git_atom,
 731         "search" => \&git_search,
 732         "search_help" => \&git_search_help,
 733         "shortlog" => \&git_shortlog,
 734         "summary" => \&git_summary,
 735         "tag" => \&git_tag,
 736         "tags" => \&git_tags,
 737         "tree" => \&git_tree,
 738         "snapshot" => \&git_snapshot,
 739         "object" => \&git_object,
 740         # those below don't need $project
 741         "opml" => \&git_opml,
 742         "project_list" => \&git_project_list,
 743         "project_index" => \&git_project_index,
 744 );
 745
 746 # finally, we have the hash of allowed extra_options for the commands that
 747 # allow them
 748 our %allowed_options = (
 749         "--no-merges" => [ qw(rss atom log shortlog history) ],
 750 );
 751
 752 # fill %input_params with the CGI parameters. All values except for 'opt'
 753 # should be single values, but opt can be an array. We should probably
 754 # build an array of parameters that can be multi-valued, but since for the time
 755 # being it's only this one, we just single it out
 756 sub evaluate_query_params {
 757         our $cgi;
 758
 759         while (my ($name, $symbol) = each %cgi_param_mapping) {
 760                 if ($symbol eq 'opt') {
 761                         $input_params{$name} = [ $cgi->param($symbol) ];
 762                 } else {
 763                         $input_params{$name} = $cgi->param($symbol);
 764                 }
 765         }
 766 }
 767
 768 # now read PATH_INFO and update the parameter list for missing parameters
 769 sub evaluate_path_info {
 770         return if defined $input_params{'project'};
 771         return if !$path_info;
 772         $path_info =~ s,^/+,,;
 773         return if !$path_info;
 774
 775         # find which part of PATH_INFO is project
 776         my $project = $path_info;
 777         $project =~ s,/+$,,;
 778         while ($project && !check_head_link("$projectroot/$project")) {
 779                 $project =~ s,/*[^/]*$,,;
 780         }
 781         return unless $project;
 782         $input_params{'project'} = $project;
 783
 784         # do not change any parameters if an action is given using the query string
 785         return if $input_params{'action'};
 786         $path_info =~ s,^\Q$project\E/*,,;
 787
 788         # next, check if we have an action
 789         my $action = $path_info;
 790         $action =~ s,/.*$,,;
 791         if (exists $actions{$action}) {
 792                 $path_info =~ s,^$action/*,,;
 793                 $input_params{'action'} = $action;
 794         }
 795
 796         # list of actions that want hash_base instead of hash, but can have no
 797         # pathname (f) parameter
 798         my @wants_base = (
 799                 'tree',
 800                 'history',
 801         );
 802
 803         # we want to catch, among others
 804         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 805         my ($parentrefname, $parentpathname, $refname, $pathname) =
 806                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 807
 808         # first, analyze the 'current' part
 809         if (defined $pathname) {
 810                 # we got "branch:filename" or "branch:dir/"
 811                 # we could use git_get_type(branch:pathname), but:
 812                 # - it needs $git_dir
 813                 # - it does a git() call
 814                 # - the convention of terminating directories with a slash
 815                 #   makes it superfluous
 816                 # - embedding the action in the PATH_INFO would make it even
 817                 #   more superfluous
 818                 $pathname =~ s,^/+,,;
 819                 if (!$pathname || substr($pathname, -1) eq "/") {
 820                         $input_params{'action'} ||= "tree";
 821                         $pathname =~ s,/$,,;
 822                 } else {
 823                         # the default action depends on whether we had parent info
 824                         # or not
 825                         if ($parentrefname) {
 826                                 $input_params{'action'} ||= "blobdiff_plain";
 827                         } else {
 828                                 $input_params{'action'} ||= "blob_plain";
 829                         }
 830                 }
 831                 $input_params{'hash_base'} ||= $refname;
 832                 $input_params{'file_name'} ||= $pathname;
 833         } elsif (defined $refname) {
 834                 # we got "branch". In this case we have to choose if we have to
 835                 # set hash or hash_base.
 836                 #
 837                 # Most of the actions without a pathname only want hash to be
 838                 # set, except for the ones specified in @wants_base that want
 839                 # hash_base instead. It should also be noted that hand-crafted
 840                 # links having 'history' as an action and no pathname or hash
 841                 # set will fail, but that happens regardless of PATH_INFO.
 842                 if (defined $parentrefname) {
 843                         # if there is parent let the default be 'shortlog' action
 844                         # (for http://git.example.com/repo.git/A..B links); if there
 845                         # is no parent, dispatch will detect type of object and set
 846                         # action appropriately if required (if action is not set)
 847                         $input_params{'action'} ||= "shortlog";
 848                 }
 849                 if ($input_params{'action'} &&
 850                     grep { $_ eq $input_params{'action'} } @wants_base) {
 851                         $input_params{'hash_base'} ||= $refname;
 852                 } else {
 853                         $input_params{'hash'} ||= $refname;
 854                 }
 855         }
 856
 857         # next, handle the 'parent' part, if present
 858         if (defined $parentrefname) {
 859                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 860                 # someproject/blobdiff/oldrev..newrev:/filename
 861                 if ($parentpathname) {
 862                         $parentpathname =~ s,^/+,,;
 863                         $parentpathname =~ s,/$,,;
 864                         $input_params{'file_parent'} ||= $parentpathname;
 865                 } else {
 866                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 867                 }
 868                 # we assume that hash_parent_base is wanted if a path was specified,
 869                 # or if the action wants hash_base instead of hash
 870                 if (defined $input_params{'file_parent'} ||
 871                         grep { $_ eq $input_params{'action'} } @wants_base) {
 872                         $input_params{'hash_parent_base'} ||= $parentrefname;
 873                 } else {
 874                         $input_params{'hash_parent'} ||= $parentrefname;
 875                 }
 876         }
 877
 878         # for the snapshot action, we allow URLs in the form
 879         # $project/snapshot/$hash.ext
 880         # where .ext determines the snapshot and gets removed from the
 881         # passed $refname to provide the $hash.
 882         #
 883         # To be able to tell that $refname includes the format extension, we
 884         # require the following two conditions to be satisfied:
 885         # - the hash input parameter MUST have been set from the $refname part
 886         #   of the URL (i.e. they must be equal)
 887         # - the snapshot format MUST NOT have been defined already (e.g. from
 888         #   CGI parameter sf)
 889         # It's also useless to try any matching unless $refname has a dot,
 890         # so we check for that too
 891         if (defined $input_params{'action'} &&
 892                 $input_params{'action'} eq 'snapshot' &&
 893                 defined $refname && index($refname, '.') != -1 &&
 894                 $refname eq $input_params{'hash'} &&
 895                 !defined $input_params{'snapshot_format'}) {
 896                 # We loop over the known snapshot formats, checking for
 897                 # extensions. Allowed extensions are both the defined suffix
 898                 # (which includes the initial dot already) and the snapshot
 899                 # format key itself, with a prepended dot
 900                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 901                         my $hash = $refname;
 902                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 903                                 next;
 904                         }
 905                         my $sfx = $1;
 906                         # a valid suffix was found, so set the snapshot format
 907                         # and reset the hash parameter
 908                         $input_params{'snapshot_format'} = $fmt;
 909                         $input_params{'hash'} = $hash;
 910                         # we also set the format suffix to the one requested
 911                         # in the URL: this way a request for e.g. .tgz returns
 912                         # a .tgz instead of a .tar.gz
 913                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 914                         last;
 915                 }
 916         }
 917 }
 918
 919 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 920      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 921      $searchtext, $search_regexp);
 922 sub evaluate_and_validate_params {
 923         our $action = $input_params{'action'};
 924         if (defined $action) {
 925                 if (!validate_action($action)) {
 926                         die_error(400, "Invalid action parameter");
 927                 }
 928         }
 929
 930         # parameters which are pathnames
 931         our $project = $input_params{'project'};
 932         if (defined $project) {
 933                 if (!validate_project($project)) {
 934                         undef $project;
 935                         die_error(404, "No such project");
 936                 }
 937         }
 938
 939         our $file_name = $input_params{'file_name'};
 940         if (defined $file_name) {
 941                 if (!validate_pathname($file_name)) {
 942                         die_error(400, "Invalid file parameter");
 943                 }
 944         }
 945
 946         our $file_parent = $input_params{'file_parent'};
 947         if (defined $file_parent) {
 948                 if (!validate_pathname($file_parent)) {
 949                         die_error(400, "Invalid file parent parameter");
 950                 }
 951         }
 952
 953         # parameters which are refnames
 954         our $hash = $input_params{'hash'};
 955         if (defined $hash) {
 956                 if (!validate_refname($hash)) {
 957                         die_error(400, "Invalid hash parameter");
 958                 }
 959         }
 960
 961         our $hash_parent = $input_params{'hash_parent'};
 962         if (defined $hash_parent) {
 963                 if (!validate_refname($hash_parent)) {
 964                         die_error(400, "Invalid hash parent parameter");
 965                 }
 966         }
 967
 968         our $hash_base = $input_params{'hash_base'};
 969         if (defined $hash_base) {
 970                 if (!validate_refname($hash_base)) {
 971                         die_error(400, "Invalid hash base parameter");
 972                 }
 973         }
 974
 975         our @extra_options = @{$input_params{'extra_options'}};
 976         # @extra_options is always defined, since it can only be (currently) set from
 977         # CGI, and $cgi->param() returns the empty array in array context if the param
 978         # is not set
 979         foreach my $opt (@extra_options) {
 980                 if (not exists $allowed_options{$opt}) {
 981                         die_error(400, "Invalid option parameter");
 982                 }
 983                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 984                         die_error(400, "Invalid option parameter for this action");
 985                 }
 986         }
 987
 988         our $hash_parent_base = $input_params{'hash_parent_base'};
 989         if (defined $hash_parent_base) {
 990                 if (!validate_refname($hash_parent_base)) {
 991                         die_error(400, "Invalid hash parent base parameter");
 992                 }
 993         }
 994
 995         # other parameters
 996         our $page = $input_params{'page'};
 997         if (defined $page) {
 998                 if ($page =~ m/[^0-9]/) {
 999                         die_error(400, "Invalid page parameter");
1000                 }
1001         }
1002
1003         our $searchtype = $input_params{'searchtype'};
1004         if (defined $searchtype) {
1005                 if ($searchtype =~ m/[^a-z]/) {
1006                         die_error(400, "Invalid searchtype parameter");
1007                 }
1008         }
1009
1010         our $search_use_regexp = $input_params{'search_use_regexp'};
1011
1012         our $searchtext = $input_params{'searchtext'};
1013         our $search_regexp;
1014         if (defined $searchtext) {
1015                 if (length($searchtext) < 2) {
1016                         die_error(403, "At least two characters are required for search parameter");
1017                 }
1018                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1019         }
1020 }
1021
1022 # path to the current git repository
1023 our $git_dir;
1024 sub evaluate_git_dir {
1025         our $git_dir = "$projectroot/$project" if $project;
1026 }
1027
1028 our (@snapshot_fmts, $git_avatar);
1029 sub configure_gitweb_features {
1030         # list of supported snapshot formats
1031         our @snapshot_fmts = gitweb_get_feature('snapshot');
1032         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1033
1034         # check that the avatar feature is set to a known provider name,
1035         # and for each provider check if the dependencies are satisfied.
1036         # if the provider name is invalid or the dependencies are not met,
1037         # reset $git_avatar to the empty string.
1038         our ($git_avatar) = gitweb_get_feature('avatar');
1039         if ($git_avatar eq 'gravatar') {
1040                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1041         } elsif ($git_avatar eq 'picon') {
1042                 # no dependencies
1043         } else {
1044                 $git_avatar = '';
1045         }
1046 }
1047
1048 # custom error handler: 'die <message>' is Internal Server Error
1049 sub handle_errors_html {
1050         my $msg = shift; # it is already HTML escaped
1051
1052         # to avoid infinite loop where error occurs in die_error,
1053         # change handler to default handler, disabling handle_errors_html
1054         set_message("Error occured when inside die_error:\n$msg");
1055
1056         # you cannot jump out of die_error when called as error handler;
1057         # the subroutine set via CGI::Carp::set_message is called _after_
1058         # HTTP headers are already written, so it cannot write them itself
1059         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1060 }
1061 set_message(\&handle_errors_html);
1062
1063 # dispatch
1064 sub dispatch {
1065         if (!defined $action) {
1066                 if (defined $hash) {
1067                         $action = git_get_type($hash);
1068                 } elsif (defined $hash_base && defined $file_name) {
1069                         $action = git_get_type("$hash_base:$file_name");
1070                 } elsif (defined $project) {
1071                         $action = 'summary';
1072                 } else {
1073                         $action = 'project_list';
1074                 }
1075         }
1076         if (!defined($actions{$action})) {
1077                 die_error(400, "Unknown action");
1078         }
1079         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1080             !$project) {
1081                 die_error(400, "Project needed");
1082         }
1083         $actions{$action}->();
1084 }
1085
1086 sub reset_timer {
1087         our $t0 = [ gettimeofday() ]
1088                 if defined $t0;
1089         our $number_of_git_cmds = 0;
1090 }
1091
1092 our $first_request = 1;
1093 sub run_request {
1094         reset_timer();
1095
1096         evaluate_uri();
1097         if ($first_request) {
1098                 evaluate_gitweb_config();
1099                 evaluate_git_version();
1100         }
1101         if ($per_request_config) {
1102                 if (ref($per_request_config) eq 'CODE') {
1103                         $per_request_config->();
1104                 } elsif (!$first_request) {
1105                         evaluate_gitweb_config();
1106                 }
1107         }
1108         check_loadavg();
1109
1110         # $projectroot and $projects_list might be set in gitweb config file
1111         $projects_list ||= $projectroot;
1112
1113         evaluate_query_params();
1114         evaluate_path_info();
1115         evaluate_and_validate_params();
1116         evaluate_git_dir();
1117
1118         configure_gitweb_features();
1119
1120         dispatch();
1121 }
1122
1123 our $is_last_request = sub { 1 };
1124 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1125 our $CGI = 'CGI';
1126 our $cgi;
1127 sub configure_as_fcgi {
1128         require CGI::Fast;
1129         our $CGI = 'CGI::Fast';
1130
1131         my $request_number = 0;
1132         # let each child service 100 requests
1133         our $is_last_request = sub { ++$request_number > 100 };
1134 }
1135 sub evaluate_argv {
1136         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1137         configure_as_fcgi()
1138                 if $script_name =~ /\.fcgi$/;
1139
1140         return unless (@ARGV);
1141
1142         require Getopt::Long;
1143         Getopt::Long::GetOptions(
1144                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1145                 'nproc|n=i' => sub {
1146                         my ($arg, $val) = @_;
1147                         return unless eval { require FCGI::ProcManager; 1; };
1148                         my $proc_manager = FCGI::ProcManager->new({
1149                                 n_processes => $val,
1150                         });
1151                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1152                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1153                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1154                 },
1155         );
1156 }
1157
1158 sub run {
1159         evaluate_argv();
1160
1161         $first_request = 1;
1162         $pre_listen_hook->()
1163                 if $pre_listen_hook;
1164
1165  REQUEST:
1166         while ($cgi = $CGI->new()) {
1167                 $pre_dispatch_hook->()
1168                         if $pre_dispatch_hook;
1169
1170                 run_request();
1171
1172                 $post_dispatch_hook->()
1173                         if $post_dispatch_hook;
1174                 $first_request = 0;
1175
1176                 last REQUEST if ($is_last_request->());
1177         }
1178
1179  DONE_GITWEB:
1180         1;
1181 }
1182
1183 run();
1184
1185 if (defined caller) {
1186         # wrapped in a subroutine processing requests,
1187         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1188         return;
1189 } else {
1190         # pure CGI script, serving single request
1191         exit;
1192 }
1193
1194 ## ======================================================================
1195 ## action links
1196
1197 # possible values of extra options
1198 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1199 # -replay => 1      - start from a current view (replay with modifications)
1200 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1201 sub href {
1202         my %params = @_;
1203         # default is to use -absolute url() i.e. $my_uri
1204         my $href = $params{-full} ? $my_url : $my_uri;
1205
1206         $params{'project'} = $project unless exists $params{'project'};
1207
1208         if ($params{-replay}) {
1209                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1210                         if (!exists $params{$name}) {
1211                                 $params{$name} = $input_params{$name};
1212                         }
1213                 }
1214         }
1215
1216         my $use_pathinfo = gitweb_check_feature('pathinfo');
1217         if (defined $params{'project'} &&
1218             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1219                 # try to put as many parameters as possible in PATH_INFO:
1220                 #   - project name
1221                 #   - action
1222                 #   - hash_parent or hash_parent_base:/file_parent
1223                 #   - hash or hash_base:/filename
1224                 #   - the snapshot_format as an appropriate suffix
1225
1226                 # When the script is the root DirectoryIndex for the domain,
1227                 # $href here would be something like http://gitweb.example.com/
1228                 # Thus, we strip any trailing / from $href, to spare us double
1229                 # slashes in the final URL
1230                 $href =~ s,/$,,;
1231
1232                 # Then add the project name, if present
1233                 $href .= "/".esc_url($params{'project'});
1234                 delete $params{'project'};
1235
1236                 # since we destructively absorb parameters, we keep this
1237                 # boolean that remembers if we're handling a snapshot
1238                 my $is_snapshot = $params{'action'} eq 'snapshot';
1239
1240                 # Summary just uses the project path URL, any other action is
1241                 # added to the URL
1242                 if (defined $params{'action'}) {
1243                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1244                         delete $params{'action'};
1245                 }
1246
1247                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1248                 # stripping nonexistent or useless pieces
1249                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1250                         || $params{'hash_parent'} || $params{'hash'});
1251                 if (defined $params{'hash_base'}) {
1252                         if (defined $params{'hash_parent_base'}) {
1253                                 $href .= esc_url($params{'hash_parent_base'});
1254                                 # skip the file_parent if it's the same as the file_name
1255                                 if (defined $params{'file_parent'}) {
1256                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1257                                                 delete $params{'file_parent'};
1258                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1259                                                 $href .= ":/".esc_url($params{'file_parent'});
1260                                                 delete $params{'file_parent'};
1261                                         }
1262                                 }
1263                                 $href .= "..";
1264                                 delete $params{'hash_parent'};
1265                                 delete $params{'hash_parent_base'};
1266                         } elsif (defined $params{'hash_parent'}) {
1267                                 $href .= esc_url($params{'hash_parent'}). "..";
1268                                 delete $params{'hash_parent'};
1269                         }
1270
1271                         $href .= esc_url($params{'hash_base'});
1272                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1273                                 $href .= ":/".esc_url($params{'file_name'});
1274                                 delete $params{'file_name'};
1275                         }
1276                         delete $params{'hash'};
1277                         delete $params{'hash_base'};
1278                 } elsif (defined $params{'hash'}) {
1279                         $href .= esc_url($params{'hash'});
1280                         delete $params{'hash'};
1281                 }
1282
1283                 # If the action was a snapshot, we can absorb the
1284                 # snapshot_format parameter too
1285                 if ($is_snapshot) {
1286                         my $fmt = $params{'snapshot_format'};
1287                         # snapshot_format should always be defined when href()
1288                         # is called, but just in case some code forgets, we
1289                         # fall back to the default
1290                         $fmt ||= $snapshot_fmts[0];
1291                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1292                         delete $params{'snapshot_format'};
1293                 }
1294         }
1295
1296         # now encode the parameters explicitly
1297         my @result = ();
1298         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1299                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1300                 if (defined $params{$name}) {
1301                         if (ref($params{$name}) eq "ARRAY") {
1302                                 foreach my $par (@{$params{$name}}) {
1303                                         push @result, $symbol . "=" . esc_param($par);
1304                                 }
1305                         } else {
1306                                 push @result, $symbol . "=" . esc_param($params{$name});
1307                         }
1308                 }
1309         }
1310         $href .= "?" . join(';', @result) if scalar @result;
1311
1312         return $href;
1313 }
1314
1315
1316 ## ======================================================================
1317 ## validation, quoting/unquoting and escaping
1318
1319 sub validate_action {
1320         my $input = shift || return undef;
1321         return undef unless exists $actions{$input};
1322         return $input;
1323 }
1324
1325 sub validate_project {
1326         my $input = shift || return undef;
1327         if (!validate_pathname($input) ||
1328                 !(-d "$projectroot/$input") ||
1329                 !check_export_ok("$projectroot/$input") ||
1330                 ($strict_export && !project_in_list($input))) {
1331                 return undef;
1332         } else {
1333                 return $input;
1334         }
1335 }
1336
1337 sub validate_pathname {
1338         my $input = shift || return undef;
1339
1340         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1341         # at the beginning, at the end, and between slashes.
1342         # also this catches doubled slashes
1343         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1344                 return undef;
1345         }
1346         # no null characters
1347         if ($input =~ m!\0!) {
1348                 return undef;
1349         }
1350         return $input;
1351 }
1352
1353 sub validate_refname {
1354         my $input = shift || return undef;
1355
1356         # textual hashes are O.K.
1357         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1358                 return $input;
1359         }
1360         # it must be correct pathname
1361         $input = validate_pathname($input)
1362                 or return undef;
1363         # restrictions on ref name according to git-check-ref-format
1364         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1365                 return undef;
1366         }
1367         return $input;
1368 }
1369
1370 # decode sequences of octets in utf8 into Perl's internal form,
1371 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1372 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1373 sub to_utf8 {
1374         my $str = shift;
1375         return undef unless defined $str;
1376         if (utf8::valid($str)) {
1377                 utf8::decode($str);
1378                 return $str;
1379         } else {
1380                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1381         }
1382 }
1383
1384 # quote unsafe chars, but keep the slash, even when it's not
1385 # correct, but quoted slashes look too horrible in bookmarks
1386 sub esc_param {
1387         my $str = shift;
1388         return undef unless defined $str;
1389         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1390         $str =~ s/ /\+/g;
1391         return $str;
1392 }
1393
1394 # quote unsafe chars in whole URL, so some characters cannot be quoted
1395 sub esc_url {
1396         my $str = shift;
1397         return undef unless defined $str;
1398         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1399         $str =~ s/ /\+/g;
1400         return $str;
1401 }
1402
1403 # replace invalid utf8 character with SUBSTITUTION sequence
1404 sub esc_html {
1405         my $str = shift;
1406         my %opts = @_;
1407
1408         return undef unless defined $str;
1409
1410         $str = to_utf8($str);
1411         $str = $cgi->escapeHTML($str);
1412         if ($opts{'-nbsp'}) {
1413                 $str =~ s/ /&nbsp;/g;
1414         }
1415         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1416         return $str;
1417 }
1418
1419 # quote control characters and escape filename to HTML
1420 sub esc_path {
1421         my $str = shift;
1422         my %opts = @_;
1423
1424         return undef unless defined $str;
1425
1426         $str = to_utf8($str);
1427         $str = $cgi->escapeHTML($str);
1428         if ($opts{'-nbsp'}) {
1429                 $str =~ s/ /&nbsp;/g;
1430         }
1431         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1432         return $str;
1433 }
1434
1435 # Make control characters "printable", using character escape codes (CEC)
1436 sub quot_cec {
1437         my $cntrl = shift;
1438         my %opts = @_;
1439         my %es = ( # character escape codes, aka escape sequences
1440                 "\t" => '\t',   # tab            (HT)
1441                 "\n" => '\n',   # line feed      (LF)
1442                 "\r" => '\r',   # carrige return (CR)
1443                 "\f" => '\f',   # form feed      (FF)
1444                 "\b" => '\b',   # backspace      (BS)
1445                 "\a" => '\a',   # alarm (bell)   (BEL)
1446                 "\e" => '\e',   # escape         (ESC)
1447                 "\013" => '\v', # vertical tab   (VT)
1448                 "\000" => '\0', # nul character  (NUL)
1449         );
1450         my $chr = ( (exists $es{$cntrl})
1451                     ? $es{$cntrl}
1452                     : sprintf('\%2x', ord($cntrl)) );
1453         if ($opts{-nohtml}) {
1454                 return $chr;
1455         } else {
1456                 return "<span class=\"cntrl\">$chr</span>";
1457         }
1458 }
1459
1460 # Alternatively use unicode control pictures codepoints,
1461 # Unicode "printable representation" (PR)
1462 sub quot_upr {
1463         my $cntrl = shift;
1464         my %opts = @_;
1465
1466         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1467         if ($opts{-nohtml}) {
1468                 return $chr;
1469         } else {
1470                 return "<span class=\"cntrl\">$chr</span>";
1471         }
1472 }
1473
1474 # git may return quoted and escaped filenames
1475 sub unquote {
1476         my $str = shift;
1477
1478         sub unq {
1479                 my $seq = shift;
1480                 my %es = ( # character escape codes, aka escape sequences
1481                         't' => "\t",   # tab            (HT, TAB)
1482                         'n' => "\n",   # newline        (NL)
1483                         'r' => "\r",   # return         (CR)
1484                         'f' => "\f",   # form feed      (FF)
1485                         'b' => "\b",   # backspace      (BS)
1486                         'a' => "\a",   # alarm (bell)   (BEL)
1487                         'e' => "\e",   # escape         (ESC)
1488                         'v' => "\013", # vertical tab   (VT)
1489                 );
1490
1491                 if ($seq =~ m/^[0-7]{1,3}$/) {
1492                         # octal char sequence
1493                         return chr(oct($seq));
1494                 } elsif (exists $es{$seq}) {
1495                         # C escape sequence, aka character escape code
1496                         return $es{$seq};
1497                 }
1498                 # quoted ordinary character
1499                 return $seq;
1500         }
1501
1502         if ($str =~ m/^"(.*)"$/) {
1503                 # needs unquoting
1504                 $str = $1;
1505                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1506         }
1507         return $str;
1508 }
1509
1510 # escape tabs (convert tabs to spaces)
1511 sub untabify {
1512         my $line = shift;
1513
1514         while ((my $pos = index($line, "\t")) != -1) {
1515                 if (my $count = (8 - ($pos % 8))) {
1516                         my $spaces = ' ' x $count;
1517                         $line =~ s/\t/$spaces/;
1518                 }
1519         }
1520
1521         return $line;
1522 }
1523
1524 sub project_in_list {
1525         my $project = shift;
1526         my @list = git_get_projects_list();
1527         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1528 }
1529
1530 ## ----------------------------------------------------------------------
1531 ## HTML aware string manipulation
1532
1533 # Try to chop given string on a word boundary between position
1534 # $len and $len+$add_len. If there is no word boundary there,
1535 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1536 # (marking chopped part) would be longer than given string.
1537 sub chop_str {
1538         my $str = shift;
1539         my $len = shift;
1540         my $add_len = shift || 10;
1541         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1542
1543         # Make sure perl knows it is utf8 encoded so we don't
1544         # cut in the middle of a utf8 multibyte char.
1545         $str = to_utf8($str);
1546
1547         # allow only $len chars, but don't cut a word if it would fit in $add_len
1548         # if it doesn't fit, cut it if it's still longer than the dots we would add
1549         # remove chopped character entities entirely
1550
1551         # when chopping in the middle, distribute $len into left and right part
1552         # return early if chopping wouldn't make string shorter
1553         if ($where eq 'center') {
1554                 return $str if ($len + 5 >= length($str)); # filler is length 5
1555                 $len = int($len/2);
1556         } else {
1557                 return $str if ($len + 4 >= length($str)); # filler is length 4
1558         }
1559
1560         # regexps: ending and beginning with word part up to $add_len
1561         my $endre = qr/.{$len}\w{0,$add_len}/;
1562         my $begre = qr/\w{0,$add_len}.{$len}/;
1563
1564         if ($where eq 'left') {
1565                 $str =~ m/^(.*?)($begre)$/;
1566                 my ($lead, $body) = ($1, $2);
1567                 if (length($lead) > 4) {
1568                         $lead = " ...";
1569                 }
1570                 return "$lead$body";
1571
1572         } elsif ($where eq 'center') {
1573                 $str =~ m/^($endre)(.*)$/;
1574                 my ($left, $str)  = ($1, $2);
1575                 $str =~ m/^(.*?)($begre)$/;
1576                 my ($mid, $right) = ($1, $2);
1577                 if (length($mid) > 5) {
1578                         $mid = " ... ";
1579                 }
1580                 return "$left$mid$right";
1581
1582         } else {
1583                 $str =~ m/^($endre)(.*)$/;
1584                 my $body = $1;
1585                 my $tail = $2;
1586                 if (length($tail) > 4) {
1587                         $tail = "... ";
1588                 }
1589                 return "$body$tail";
1590         }
1591 }
1592
1593 # takes the same arguments as chop_str, but also wraps a <span> around the
1594 # result with a title attribute if it does get chopped. Additionally, the
1595 # string is HTML-escaped.
1596 sub chop_and_escape_str {
1597         my ($str) = @_;
1598
1599         my $chopped = chop_str(@_);
1600         if ($chopped eq $str) {
1601                 return esc_html($chopped);
1602         } else {
1603                 $str =~ s/[[:cntrl:]]/?/g;
1604                 return $cgi->span({-title=>$str}, esc_html($chopped));
1605         }
1606 }
1607
1608 ## ----------------------------------------------------------------------
1609 ## functions returning short strings
1610
1611 # CSS class for given age value (in seconds)
1612 sub age_class {
1613         my $age = shift;
1614
1615         if (!defined $age) {
1616                 return "noage";
1617         } elsif ($age < 60*60*2) {
1618                 return "age0";
1619         } elsif ($age < 60*60*24*2) {
1620                 return "age1";
1621         } else {
1622                 return "age2";
1623         }
1624 }
1625
1626 # convert age in seconds to "nn units ago" string
1627 sub age_string {
1628         my $age = shift;
1629         my $age_str;
1630
1631         if ($age > 60*60*24*365*2) {
1632                 $age_str = (int $age/60/60/24/365);
1633                 $age_str .= " years ago";
1634         } elsif ($age > 60*60*24*(365/12)*2) {
1635                 $age_str = int $age/60/60/24/(365/12);
1636                 $age_str .= " months ago";
1637         } elsif ($age > 60*60*24*7*2) {
1638                 $age_str = int $age/60/60/24/7;
1639                 $age_str .= " weeks ago";
1640         } elsif ($age > 60*60*24*2) {
1641                 $age_str = int $age/60/60/24;
1642                 $age_str .= " days ago";
1643         } elsif ($age > 60*60*2) {
1644                 $age_str = int $age/60/60;
1645                 $age_str .= " hours ago";
1646         } elsif ($age > 60*2) {
1647                 $age_str = int $age/60;
1648                 $age_str .= " min ago";
1649         } elsif ($age > 2) {
1650                 $age_str = int $age;
1651                 $age_str .= " sec ago";
1652         } else {
1653                 $age_str .= " right now";
1654         }
1655         return $age_str;
1656 }
1657
1658 use constant {
1659         S_IFINVALID => 0030000,
1660         S_IFGITLINK => 0160000,
1661 };
1662
1663 # submodule/subproject, a commit object reference
1664 sub S_ISGITLINK {
1665         my $mode = shift;
1666
1667         return (($mode & S_IFMT) == S_IFGITLINK)
1668 }
1669
1670 # convert file mode in octal to symbolic file mode string
1671 sub mode_str {
1672         my $mode = oct shift;
1673
1674         if (S_ISGITLINK($mode)) {
1675                 return 'm---------';
1676         } elsif (S_ISDIR($mode & S_IFMT)) {
1677                 return 'drwxr-xr-x';
1678         } elsif (S_ISLNK($mode)) {
1679                 return 'lrwxrwxrwx';
1680         } elsif (S_ISREG($mode)) {
1681                 # git cares only about the executable bit
1682                 if ($mode & S_IXUSR) {
1683                         return '-rwxr-xr-x';
1684                 } else {
1685                         return '-rw-r--r--';
1686                 };
1687         } else {
1688                 return '----------';
1689         }
1690 }
1691
1692 # convert file mode in octal to file type string
1693 sub file_type {
1694         my $mode = shift;
1695
1696         if ($mode !~ m/^[0-7]+$/) {
1697                 return $mode;
1698         } else {
1699                 $mode = oct $mode;
1700         }
1701
1702         if (S_ISGITLINK($mode)) {
1703                 return "submodule";
1704         } elsif (S_ISDIR($mode & S_IFMT)) {
1705                 return "directory";
1706         } elsif (S_ISLNK($mode)) {
1707                 return "symlink";
1708         } elsif (S_ISREG($mode)) {
1709                 return "file";
1710         } else {
1711                 return "unknown";
1712         }
1713 }
1714
1715 # convert file mode in octal to file type description string
1716 sub file_type_long {
1717         my $mode = shift;
1718
1719         if ($mode !~ m/^[0-7]+$/) {
1720                 return $mode;
1721         } else {
1722                 $mode = oct $mode;
1723         }
1724
1725         if (S_ISGITLINK($mode)) {
1726                 return "submodule";
1727         } elsif (S_ISDIR($mode & S_IFMT)) {
1728                 return "directory";
1729         } elsif (S_ISLNK($mode)) {
1730                 return "symlink";
1731         } elsif (S_ISREG($mode)) {
1732                 if ($mode & S_IXUSR) {
1733                         return "executable";
1734                 } else {
1735                         return "file";
1736                 };
1737         } else {
1738                 return "unknown";
1739         }
1740 }
1741
1742
1743 ## ----------------------------------------------------------------------
1744 ## functions returning short HTML fragments, or transforming HTML fragments
1745 ## which don't belong to other sections
1746
1747 # format line of commit message.
1748 sub format_log_line_html {
1749         my $line = shift;
1750
1751         $line = esc_html($line, -nbsp=>1);
1752         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1753                 $cgi->a({-href => href(action=>"object", hash=>$1),
1754                                         -class => "text"}, $1);
1755         }eg;
1756
1757         return $line;
1758 }
1759
1760 # format marker of refs pointing to given object
1761
1762 # the destination action is chosen based on object type and current context:
1763 # - for annotated tags, we choose the tag view unless it's the current view
1764 #   already, in which case we go to shortlog view
1765 # - for other refs, we keep the current view if we're in history, shortlog or
1766 #   log view, and select shortlog otherwise
1767 sub format_ref_marker {
1768         my ($refs, $id) = @_;
1769         my $markers = '';
1770
1771         if (defined $refs->{$id}) {
1772                 foreach my $ref (@{$refs->{$id}}) {
1773                         # this code exploits the fact that non-lightweight tags are the
1774                         # only indirect objects, and that they are the only objects for which
1775                         # we want to use tag instead of shortlog as action
1776                         my ($type, $name) = qw();
1777                         my $indirect = ($ref =~ s/\^\{\}$//);
1778                         # e.g. tags/v2.6.11 or heads/next
1779                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1780                                 $type = $1;
1781                                 $name = $2;
1782                         } else {
1783                                 $type = "ref";
1784                                 $name = $ref;
1785                         }
1786
1787                         my $class = $type;
1788                         $class .= " indirect" if $indirect;
1789
1790                         my $dest_action = "shortlog";
1791
1792                         if ($indirect) {
1793                                 $dest_action = "tag" unless $action eq "tag";
1794                         } elsif ($action =~ /^(history|(short)?log)$/) {
1795                                 $dest_action = $action;
1796                         }
1797
1798                         my $dest = "";
1799                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1800                         $dest .= $ref;
1801
1802                         my $link = $cgi->a({
1803                                 -href => href(
1804                                         action=>$dest_action,
1805                                         hash=>$dest
1806                                 )}, $name);
1807
1808                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1809                                 $link . "</span>";
1810                 }
1811         }
1812
1813         if ($markers) {
1814                 return ' <span class="refs">'. $markers . '</span>';
1815         } else {
1816                 return "";
1817         }
1818 }
1819
1820 # format, perhaps shortened and with markers, title line
1821 sub format_subject_html {
1822         my ($long, $short, $href, $extra) = @_;
1823         $extra = '' unless defined($extra);
1824
1825         if (length($short) < length($long)) {
1826                 $long =~ s/[[:cntrl:]]/?/g;
1827                 return $cgi->a({-href => $href, -class => "list subject",
1828                                 -title => to_utf8($long)},
1829                        esc_html($short)) . $extra;
1830         } else {
1831                 return $cgi->a({-href => $href, -class => "list subject"},
1832                        esc_html($long)) . $extra;
1833         }
1834 }
1835
1836 # Rather than recomputing the url for an email multiple times, we cache it
1837 # after the first hit. This gives a visible benefit in views where the avatar
1838 # for the same email is used repeatedly (e.g. shortlog).
1839 # The cache is shared by all avatar engines (currently gravatar only), which
1840 # are free to use it as preferred. Since only one avatar engine is used for any
1841 # given page, there's no risk for cache conflicts.
1842 our %avatar_cache = ();
1843
1844 # Compute the picon url for a given email, by using the picon search service over at
1845 # http://www.cs.indiana.edu/picons/search.html
1846 sub picon_url {
1847         my $email = lc shift;
1848         if (!$avatar_cache{$email}) {
1849                 my ($user, $domain) = split('@', $email);
1850                 $avatar_cache{$email} =
1851                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1852                         "$domain/$user/" .
1853                         "users+domains+unknown/up/single";
1854         }
1855         return $avatar_cache{$email};
1856 }
1857
1858 # Compute the gravatar url for a given email, if it's not in the cache already.
1859 # Gravatar stores only the part of the URL before the size, since that's the
1860 # one computationally more expensive. This also allows reuse of the cache for
1861 # different sizes (for this particular engine).
1862 sub gravatar_url {
1863         my $email = lc shift;
1864         my $size = shift;
1865         $avatar_cache{$email} ||=
1866                 "http://www.gravatar.com/avatar/" .
1867                         Digest::MD5::md5_hex($email) . "?s=";
1868         return $avatar_cache{$email} . $size;
1869 }
1870
1871 # Insert an avatar for the given $email at the given $size if the feature
1872 # is enabled.
1873 sub git_get_avatar {
1874         my ($email, %opts) = @_;
1875         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1876         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1877         $opts{-size} ||= 'default';
1878         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1879         my $url = "";
1880         if ($git_avatar eq 'gravatar') {
1881                 $url = gravatar_url($email, $size);
1882         } elsif ($git_avatar eq 'picon') {
1883                 $url = picon_url($email);
1884         }
1885         # Other providers can be added by extending the if chain, defining $url
1886         # as needed. If no variant puts something in $url, we assume avatars
1887         # are completely disabled/unavailable.
1888         if ($url) {
1889                 return $pre_white .
1890                        "<img width=\"$size\" " .
1891                             "class=\"avatar\" " .
1892                             "src=\"$url\" " .
1893                             "alt=\"\" " .
1894                        "/>" . $post_white;
1895         } else {
1896                 return "";
1897         }
1898 }
1899
1900 sub format_search_author {
1901         my ($author, $searchtype, $displaytext) = @_;
1902         my $have_search = gitweb_check_feature('search');
1903
1904         if ($have_search) {
1905                 my $performed = "";
1906                 if ($searchtype eq 'author') {
1907                         $performed = "authored";
1908                 } elsif ($searchtype eq 'committer') {
1909                         $performed = "committed";
1910                 }
1911
1912                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1913                                 searchtext=>$author,
1914                                 searchtype=>$searchtype), class=>"list",
1915                                 title=>"Search for commits $performed by $author"},
1916                                 $displaytext);
1917
1918         } else {
1919                 return $displaytext;
1920         }
1921 }
1922
1923 # format the author name of the given commit with the given tag
1924 # the author name is chopped and escaped according to the other
1925 # optional parameters (see chop_str).
1926 sub format_author_html {
1927         my $tag = shift;
1928         my $co = shift;
1929         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1930         return "<$tag class=\"author\">" .
1931                format_search_author($co->{'author_name'}, "author",
1932                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1933                        $author) .
1934                "</$tag>";
1935 }
1936
1937 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1938 sub format_git_diff_header_line {
1939         my $line = shift;
1940         my $diffinfo = shift;
1941         my ($from, $to) = @_;
1942
1943         if ($diffinfo->{'nparents'}) {
1944                 # combined diff
1945                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1946                 if ($to->{'href'}) {
1947                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1948                                          esc_path($to->{'file'}));
1949                 } else { # file was deleted (no href)
1950                         $line .= esc_path($to->{'file'});
1951                 }
1952         } else {
1953                 # "ordinary" diff
1954                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1955                 if ($from->{'href'}) {
1956                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1957                                          'a/' . esc_path($from->{'file'}));
1958                 } else { # file was added (no href)
1959                         $line .= 'a/' . esc_path($from->{'file'});
1960                 }
1961                 $line .= ' ';
1962                 if ($to->{'href'}) {
1963                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1964                                          'b/' . esc_path($to->{'file'}));
1965                 } else { # file was deleted
1966                         $line .= 'b/' . esc_path($to->{'file'});
1967                 }
1968         }
1969
1970         return "<div class=\"diff header\">$line</div>\n";
1971 }
1972
1973 # format extended diff header line, before patch itself
1974 sub format_extended_diff_header_line {
1975         my $line = shift;
1976         my $diffinfo = shift;
1977         my ($from, $to) = @_;
1978
1979         # match <path>
1980         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1981                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1982                                        esc_path($from->{'file'}));
1983         }
1984         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1985                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1986                                  esc_path($to->{'file'}));
1987         }
1988         # match single <mode>
1989         if ($line =~ m/\s(\d{6})$/) {
1990                 $line .= '<span class="info"> (' .
1991                          file_type_long($1) .
1992                          ')</span>';
1993         }
1994         # match <hash>
1995         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1996                 # can match only for combined diff
1997                 $line = 'index ';
1998                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1999                         if ($from->{'href'}[$i]) {
2000                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2001                                                   -class=>"hash"},
2002                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2003                         } else {
2004                                 $line .= '0' x 7;
2005                         }
2006                         # separator
2007                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2008                 }
2009                 $line .= '..';
2010                 if ($to->{'href'}) {
2011                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2012                                          substr($diffinfo->{'to_id'},0,7));
2013                 } else {
2014                         $line .= '0' x 7;
2015                 }
2016
2017         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2018                 # can match only for ordinary diff
2019                 my ($from_link, $to_link);
2020                 if ($from->{'href'}) {
2021                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2022                                              substr($diffinfo->{'from_id'},0,7));
2023                 } else {
2024                         $from_link = '0' x 7;
2025                 }
2026                 if ($to->{'href'}) {
2027                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2028                                            substr($diffinfo->{'to_id'},0,7));
2029                 } else {
2030                         $to_link = '0' x 7;
2031                 }
2032                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2033                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2034         }
2035
2036         return $line . "<br/>\n";
2037 }
2038
2039 # format from-file/to-file diff header
2040 sub format_diff_from_to_header {
2041         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2042         my $line;
2043         my $result = '';
2044
2045         $line = $from_line;
2046         #assert($line =~ m/^---/) if DEBUG;
2047         # no extra formatting for "^--- /dev/null"
2048         if (! $diffinfo->{'nparents'}) {
2049                 # ordinary (single parent) diff
2050                 if ($line =~ m!^--- "?a/!) {
2051                         if ($from->{'href'}) {
2052                                 $line = '--- a/' .
2053                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2054                                                 esc_path($from->{'file'}));
2055                         } else {
2056                                 $line = '--- a/' .
2057                                         esc_path($from->{'file'});
2058                         }
2059                 }
2060                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2061
2062         } else {
2063                 # combined diff (merge commit)
2064                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2065                         if ($from->{'href'}[$i]) {
2066                                 $line = '--- ' .
2067                                         $cgi->a({-href=>href(action=>"blobdiff",
2068                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2069                                                              hash_parent_base=>$parents[$i],
2070                                                              file_parent=>$from->{'file'}[$i],
2071                                                              hash=>$diffinfo->{'to_id'},
2072                                                              hash_base=>$hash,
2073                                                              file_name=>$to->{'file'}),
2074                                                  -class=>"path",
2075                                                  -title=>"diff" . ($i+1)},
2076                                                 $i+1) .
2077                                         '/' .
2078                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2079                                                 esc_path($from->{'file'}[$i]));
2080                         } else {
2081                                 $line = '--- /dev/null';
2082                         }
2083                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2084                 }
2085         }
2086
2087         $line = $to_line;
2088         #assert($line =~ m/^\+\+\+/) if DEBUG;
2089         # no extra formatting for "^+++ /dev/null"
2090         if ($line =~ m!^\+\+\+ "?b/!) {
2091                 if ($to->{'href'}) {
2092                         $line = '+++ b/' .
2093                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2094                                         esc_path($to->{'file'}));
2095                 } else {
2096                         $line = '+++ b/' .
2097                                 esc_path($to->{'file'});
2098                 }
2099         }
2100         $result .= qq!<div class="diff to_file">$line</div>\n!;
2101
2102         return $result;
2103 }
2104
2105 # create note for patch simplified by combined diff
2106 sub format_diff_cc_simplified {
2107         my ($diffinfo, @parents) = @_;
2108         my $result = '';
2109
2110         $result .= "<div class=\"diff header\">" .
2111                    "diff --cc ";
2112         if (!is_deleted($diffinfo)) {
2113                 $result .= $cgi->a({-href => href(action=>"blob",
2114                                                   hash_base=>$hash,
2115                                                   hash=>$diffinfo->{'to_id'},
2116                                                   file_name=>$diffinfo->{'to_file'}),
2117                                     -class => "path"},
2118                                    esc_path($diffinfo->{'to_file'}));
2119         } else {
2120                 $result .= esc_path($diffinfo->{'to_file'});
2121         }
2122         $result .= "</div>\n" . # class="diff header"
2123                    "<div class=\"diff nodifferences\">" .
2124                    "Simple merge" .
2125                    "</div>\n"; # class="diff nodifferences"
2126
2127         return $result;
2128 }
2129
2130 # format patch (diff) line (not to be used for diff headers)
2131 sub format_diff_line {
2132         my $line = shift;
2133         my ($from, $to) = @_;
2134         my $diff_class = "";
2135
2136         chomp $line;
2137
2138         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2139                 # combined diff
2140                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2141                 if ($line =~ m/^\@{3}/) {
2142                         $diff_class = " chunk_header";
2143                 } elsif ($line =~ m/^\\/) {
2144                         $diff_class = " incomplete";
2145                 } elsif ($prefix =~ tr/+/+/) {
2146                         $diff_class = " add";
2147                 } elsif ($prefix =~ tr/-/-/) {
2148                         $diff_class = " rem";
2149                 }
2150         } else {
2151                 # assume ordinary diff
2152                 my $char = substr($line, 0, 1);
2153                 if ($char eq '+') {
2154                         $diff_class = " add";
2155                 } elsif ($char eq '-') {
2156                         $diff_class = " rem";
2157                 } elsif ($char eq '@') {
2158                         $diff_class = " chunk_header";
2159                 } elsif ($char eq "\\") {
2160                         $diff_class = " incomplete";
2161                 }
2162         }
2163         $line = untabify($line);
2164         if ($from && $to && $line =~ m/^\@{2} /) {
2165                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2166                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2167
2168                 $from_lines = 0 unless defined $from_lines;
2169                 $to_lines   = 0 unless defined $to_lines;
2170
2171                 if ($from->{'href'}) {
2172                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2173                                              -class=>"list"}, $from_text);
2174                 }
2175                 if ($to->{'href'}) {
2176                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2177                                              -class=>"list"}, $to_text);
2178                 }
2179                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2180                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2181                 return "<div class=\"diff$diff_class\">$line</div>\n";
2182         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2183                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2184                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2185
2186                 @from_text = split(' ', $ranges);
2187                 for (my $i = 0; $i < @from_text; ++$i) {
2188                         ($from_start[$i], $from_nlines[$i]) =
2189                                 (split(',', substr($from_text[$i], 1)), 0);
2190                 }
2191
2192                 $to_text   = pop @from_text;
2193                 $to_start  = pop @from_start;
2194                 $to_nlines = pop @from_nlines;
2195
2196                 $line = "<span class=\"chunk_info\">$prefix ";
2197                 for (my $i = 0; $i < @from_text; ++$i) {
2198                         if ($from->{'href'}[$i]) {
2199                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2200                                                   -class=>"list"}, $from_text[$i]);
2201                         } else {
2202                                 $line .= $from_text[$i];
2203                         }
2204                         $line .= " ";
2205                 }
2206                 if ($to->{'href'}) {
2207                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2208                                           -class=>"list"}, $to_text);
2209                 } else {
2210                         $line .= $to_text;
2211                 }
2212                 $line .= " $prefix</span>" .
2213                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2214                 return "<div class=\"diff$diff_class\">$line</div>\n";
2215         }
2216         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2217 }
2218
2219 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2220 # linked.  Pass the hash of the tree/commit to snapshot.
2221 sub format_snapshot_links {
2222         my ($hash) = @_;
2223         my $num_fmts = @snapshot_fmts;
2224         if ($num_fmts > 1) {
2225                 # A parenthesized list of links bearing format names.
2226                 # e.g. "snapshot (_tar.gz_ _zip_)"
2227                 return "snapshot (" . join(' ', map
2228                         $cgi->a({
2229                                 -href => href(
2230                                         action=>"snapshot",
2231                                         hash=>$hash,
2232                                         snapshot_format=>$_
2233                                 )
2234                         }, $known_snapshot_formats{$_}{'display'})
2235                 , @snapshot_fmts) . ")";
2236         } elsif ($num_fmts == 1) {
2237                 # A single "snapshot" link whose tooltip bears the format name.
2238                 # i.e. "_snapshot_"
2239                 my ($fmt) = @snapshot_fmts;
2240                 return
2241                         $cgi->a({
2242                                 -href => href(
2243                                         action=>"snapshot",
2244                                         hash=>$hash,
2245                                         snapshot_format=>$fmt
2246                                 ),
2247                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2248                         }, "snapshot");
2249         } else { # $num_fmts == 0
2250                 return undef;
2251         }
2252 }
2253
2254 ## ......................................................................
2255 ## functions returning values to be passed, perhaps after some
2256 ## transformation, to other functions; e.g. returning arguments to href()
2257
2258 # returns hash to be passed to href to generate gitweb URL
2259 # in -title key it returns description of link
2260 sub get_feed_info {
2261         my $format = shift || 'Atom';
2262         my %res = (action => lc($format));
2263
2264         # feed links are possible only for project views
2265         return unless (defined $project);
2266         # some views should link to OPML, or to generic project feed,
2267         # or don't have specific feed yet (so they should use generic)
2268         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2269
2270         my $branch;
2271         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2272         # from tag links; this also makes possible to detect branch links
2273         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2274             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2275                 $branch = $1;
2276         }
2277         # find log type for feed description (title)
2278         my $type = 'log';
2279         if (defined $file_name) {
2280                 $type  = "history of $file_name";
2281                 $type .= "/" if ($action eq 'tree');
2282                 $type .= " on '$branch'" if (defined $branch);
2283         } else {
2284                 $type = "log of $branch" if (defined $branch);
2285         }
2286
2287         $res{-title} = $type;
2288         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2289         $res{'file_name'} = $file_name;
2290
2291         return %res;
2292 }
2293
2294 ## ----------------------------------------------------------------------
2295 ## git utility subroutines, invoking git commands
2296
2297 # returns path to the core git executable and the --git-dir parameter as list
2298 sub git_cmd {
2299         $number_of_git_cmds++;
2300         return $GIT, '--git-dir='.$git_dir;
2301 }
2302
2303 # quote the given arguments for passing them to the shell
2304 # quote_command("command", "arg 1", "arg with ' and ! characters")
2305 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2306 # Try to avoid using this function wherever possible.
2307 sub quote_command {
2308         return join(' ',
2309                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2310 }
2311
2312 # get HEAD ref of given project as hash
2313 sub git_get_head_hash {
2314         return git_get_full_hash(shift, 'HEAD');
2315 }
2316
2317 sub git_get_full_hash {
2318         return git_get_hash(@_);
2319 }
2320
2321 sub git_get_short_hash {
2322         return git_get_hash(@_, '--short=7');
2323 }
2324
2325 sub git_get_hash {
2326         my ($project, $hash, @options) = @_;
2327         my $o_git_dir = $git_dir;
2328         my $retval = undef;
2329         $git_dir = "$projectroot/$project";
2330         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2331             '--verify', '-q', @options, $hash) {
2332                 $retval = <$fd>;
2333                 chomp $retval if defined $retval;
2334                 close $fd;
2335         }
2336         if (defined $o_git_dir) {
2337                 $git_dir = $o_git_dir;
2338         }
2339         return $retval;
2340 }
2341
2342 # get type of given object
2343 sub git_get_type {
2344         my $hash = shift;
2345
2346         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2347         my $type = <$fd>;
2348         close $fd or return;
2349         chomp $type;
2350         return $type;
2351 }
2352
2353 # repository configuration
2354 our $config_file = '';
2355 our %config;
2356
2357 # store multiple values for single key as anonymous array reference
2358 # single values stored directly in the hash, not as [ <value> ]
2359 sub hash_set_multi {
2360         my ($hash, $key, $value) = @_;
2361
2362         if (!exists $hash->{$key}) {
2363                 $hash->{$key} = $value;
2364         } elsif (!ref $hash->{$key}) {
2365                 $hash->{$key} = [ $hash->{$key}, $value ];
2366         } else {
2367                 push @{$hash->{$key}}, $value;
2368         }
2369 }
2370
2371 # return hash of git project configuration
2372 # optionally limited to some section, e.g. 'gitweb'
2373 sub git_parse_project_config {
2374         my $section_regexp = shift;
2375         my %config;
2376
2377         local $/ = "\0";
2378
2379         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2380                 or return;
2381
2382         while (my $keyval = <$fh>) {
2383                 chomp $keyval;
2384                 my ($key, $value) = split(/\n/, $keyval, 2);
2385
2386                 hash_set_multi(\%config, $key, $value)
2387                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2388         }
2389         close $fh;
2390
2391         return %config;
2392 }
2393
2394 # convert config value to boolean: 'true' or 'false'
2395 # no value, number > 0, 'true' and 'yes' values are true
2396 # rest of values are treated as false (never as error)
2397 sub config_to_bool {
2398         my $val = shift;
2399
2400         return 1 if !defined $val;             # section.key
2401
2402         # strip leading and trailing whitespace
2403         $val =~ s/^\s+//;
2404         $val =~ s/\s+$//;
2405
2406         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2407                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2408 }
2409
2410 # convert config value to simple decimal number
2411 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2412 # to be multiplied by 1024, 1048576, or 1073741824
2413 sub config_to_int {
2414         my $val = shift;
2415
2416         # strip leading and trailing whitespace
2417         $val =~ s/^\s+//;
2418         $val =~ s/\s+$//;
2419
2420         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2421                 $unit = lc($unit);
2422                 # unknown unit is treated as 1
2423                 return $num * ($unit eq 'g' ? 1073741824 :
2424                                $unit eq 'm' ?    1048576 :
2425                                $unit eq 'k' ?       1024 : 1);
2426         }
2427         return $val;
2428 }
2429
2430 # convert config value to array reference, if needed
2431 sub config_to_multi {
2432         my $val = shift;
2433
2434         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2435 }
2436
2437 sub git_get_project_config {
2438         my ($key, $type) = @_;
2439
2440         return unless defined $git_dir;
2441
2442         # key sanity check
2443         return unless ($key);
2444         $key =~ s/^gitweb\.//;
2445         return if ($key =~ m/\W/);
2446
2447         # type sanity check
2448         if (defined $type) {
2449                 $type =~ s/^--//;
2450                 $type = undef
2451                         unless ($type eq 'bool' || $type eq 'int');
2452         }
2453
2454         # get config
2455         if (!defined $config_file ||
2456             $config_file ne "$git_dir/config") {
2457                 %config = git_parse_project_config('gitweb');
2458                 $config_file = "$git_dir/config";
2459         }
2460
2461         # check if config variable (key) exists
2462         return unless exists $config{"gitweb.$key"};
2463
2464         # ensure given type
2465         if (!defined $type) {
2466                 return $config{"gitweb.$key"};
2467         } elsif ($type eq 'bool') {
2468                 # backward compatibility: 'git config --bool' returns true/false
2469                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2470         } elsif ($type eq 'int') {
2471                 return config_to_int($config{"gitweb.$key"});
2472         }
2473         return $config{"gitweb.$key"};
2474 }
2475
2476 # get hash of given path at given ref
2477 sub git_get_hash_by_path {
2478         my $base = shift;
2479         my $path = shift || return undef;
2480         my $type = shift;
2481
2482         $path =~ s,/+$,,;
2483
2484         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2485                 or die_error(500, "Open git-ls-tree failed");
2486         my $line = <$fd>;
2487         close $fd or return undef;
2488
2489         if (!defined $line) {
2490                 # there is no tree or hash given by $path at $base
2491                 return undef;
2492         }
2493
2494         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2495         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2496         if (defined $type && $type ne $2) {
2497                 # type doesn't match
2498                 return undef;
2499         }
2500         return $3;
2501 }
2502
2503 # get path of entry with given hash at given tree-ish (ref)
2504 # used to get 'from' filename for combined diff (merge commit) for renames
2505 sub git_get_path_by_hash {
2506         my $base = shift || return;
2507         my $hash = shift || return;
2508
2509         local $/ = "\0";
2510
2511         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2512                 or return undef;
2513         while (my $line = <$fd>) {
2514                 chomp $line;
2515
2516                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2517                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2518                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2519                         close $fd;
2520                         return $1;
2521                 }
2522         }
2523         close $fd;
2524         return undef;
2525 }
2526
2527 ## ......................................................................
2528 ## git utility functions, directly accessing git repository
2529
2530 sub git_get_project_description {
2531         my $path = shift;
2532
2533         $git_dir = "$projectroot/$path";
2534         open my $fd, '<', "$git_dir/description"
2535                 or return git_get_project_config('description');
2536         my $descr = <$fd>;
2537         close $fd;
2538         if (defined $descr) {
2539                 chomp $descr;
2540         }
2541         return $descr;
2542 }
2543
2544 sub git_get_project_ctags {
2545         my $path = shift;
2546         my $ctags = {};
2547
2548         $git_dir = "$projectroot/$path";
2549         opendir my $dh, "$git_dir/ctags"
2550                 or return $ctags;
2551         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2552                 open my $ct, '<', $_ or next;
2553                 my $val = <$ct>;
2554                 chomp $val;
2555                 close $ct;
2556                 my $ctag = $_; $ctag =~ s#.*/##;
2557                 $ctags->{$ctag} = $val;
2558         }
2559         closedir $dh;
2560         $ctags;
2561 }
2562
2563 sub git_populate_project_tagcloud {
2564         my $ctags = shift;
2565
2566         # First, merge different-cased tags; tags vote on casing
2567         my %ctags_lc;
2568         foreach (keys %$ctags) {
2569                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2570                 if (not $ctags_lc{lc $_}->{topcount}
2571                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2572                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2573                         $ctags_lc{lc $_}->{topname} = $_;
2574                 }
2575         }
2576
2577         my $cloud;
2578         if (eval { require HTML::TagCloud; 1; }) {
2579                 $cloud = HTML::TagCloud->new;
2580                 foreach (sort keys %ctags_lc) {
2581                         # Pad the title with spaces so that the cloud looks
2582                         # less crammed.
2583                         my $title = $ctags_lc{$_}->{topname};
2584                         $title =~ s/ /&nbsp;/g;
2585                         $title =~ s/^/&nbsp;/g;
2586                         $title =~ s/$/&nbsp;/g;
2587                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2588                 }
2589         } else {
2590                 $cloud = \%ctags_lc;
2591         }
2592         $cloud;
2593 }
2594
2595 sub git_show_project_tagcloud {
2596         my ($cloud, $count) = @_;
2597         print STDERR ref($cloud)."..\n";
2598         if (ref $cloud eq 'HTML::TagCloud') {
2599                 return $cloud->html_and_css($count);
2600         } else {
2601                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2602                 return '<p align="center">' . join (', ', map {
2603                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2604                 } splice(@tags, 0, $count)) . '</p>';
2605         }
2606 }
2607
2608 sub git_get_project_url_list {
2609         my $path = shift;
2610
2611         $git_dir = "$projectroot/$path";
2612         open my $fd, '<', "$git_dir/cloneurl"
2613                 or return wantarray ?
2614                 @{ config_to_multi(git_get_project_config('url')) } :
2615                    config_to_multi(git_get_project_config('url'));
2616         my @git_project_url_list = map { chomp; $_ } <$fd>;
2617         close $fd;
2618
2619         return wantarray ? @git_project_url_list : \@git_project_url_list;
2620 }
2621
2622 sub git_get_projects_list {
2623         my ($filter) = @_;
2624         my @list;
2625
2626         $filter ||= '';
2627         $filter =~ s/\.git$//;
2628
2629         my $check_forks = gitweb_check_feature('forks');
2630
2631         if (-d $projects_list) {
2632                 # search in directory
2633                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2634                 # remove the trailing "/"
2635                 $dir =~ s!/+$!!;
2636                 my $pfxlen = length("$dir");
2637                 my $pfxdepth = ($dir =~ tr!/!!);
2638
2639                 File::Find::find({
2640                         follow_fast => 1, # follow symbolic links
2641                         follow_skip => 2, # ignore duplicates
2642                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2643                         wanted => sub {
2644                                 # global variables
2645                                 our $project_maxdepth;
2646                                 our $projectroot;
2647                                 # skip project-list toplevel, if we get it.
2648                                 return if (m!^[/.]$!);
2649                                 # only directories can be git repositories
2650                                 return unless (-d $_);
2651                                 # don't traverse too deep (Find is super slow on os x)
2652                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2653                                         $File::Find::prune = 1;
2654                                         return;
2655                                 }
2656
2657                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2658                                 # we check related file in $projectroot
2659                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2660                                 if (check_export_ok("$projectroot/$path")) {
2661                                         push @list, { path => $path };
2662                                         $File::Find::prune = 1;
2663                                 }
2664                         },
2665                 }, "$dir");
2666
2667         } elsif (-f $projects_list) {
2668                 # read from file(url-encoded):
2669                 # 'git%2Fgit.git Linus+Torvalds'
2670                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2671                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2672                 my %paths;
2673                 open my $fd, '<', $projects_list or return;
2674         PROJECT:
2675                 while (my $line = <$fd>) {
2676                         chomp $line;
2677                         my ($path, $owner) = split ' ', $line;
2678                         $path = unescape($path);
2679                         $owner = unescape($owner);
2680                         if (!defined $path) {
2681                                 next;
2682                         }
2683                         if ($filter ne '') {
2684                                 # looking for forks;
2685                                 my $pfx = substr($path, 0, length($filter));
2686                                 if ($pfx ne $filter) {
2687                                         next PROJECT;
2688                                 }
2689                                 my $sfx = substr($path, length($filter));
2690                                 if ($sfx !~ /^\/.*\.git$/) {
2691                                         next PROJECT;
2692                                 }
2693                         } elsif ($check_forks) {
2694                         PATH:
2695                                 foreach my $filter (keys %paths) {
2696                                         # looking for forks;
2697                                         my $pfx = substr($path, 0, length($filter));
2698                                         if ($pfx ne $filter) {
2699                                                 next PATH;
2700                                         }
2701                                         my $sfx = substr($path, length($filter));
2702                                         if ($sfx !~ /^\/.*\.git$/) {
2703                                                 next PATH;
2704                                         }
2705                                         # is a fork, don't include it in
2706                                         # the list
2707                                         next PROJECT;
2708                                 }
2709                         }
2710                         if (check_export_ok("$projectroot/$path")) {
2711                                 my $pr = {
2712                                         path => $path,
2713                                         owner => to_utf8($owner),
2714                                 };
2715                                 push @list, $pr;
2716                                 (my $forks_path = $path) =~ s/\.git$//;
2717                                 $paths{$forks_path}++;
2718                         }
2719                 }
2720                 close $fd;
2721         }
2722         return @list;
2723 }
2724
2725 our $gitweb_project_owner = undef;
2726 sub git_get_project_list_from_file {
2727
2728         return if (defined $gitweb_project_owner);
2729
2730         $gitweb_project_owner = {};
2731         # read from file (url-encoded):
2732         # 'git%2Fgit.git Linus+Torvalds'
2733         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2734         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2735         if (-f $projects_list) {
2736                 open(my $fd, '<', $projects_list);
2737                 while (my $line = <$fd>) {
2738                         chomp $line;
2739                         my ($pr, $ow) = split ' ', $line;
2740                         $pr = unescape($pr);
2741                         $ow = unescape($ow);
2742                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2743                 }
2744                 close $fd;
2745         }
2746 }
2747
2748 sub git_get_project_owner {
2749         my $project = shift;
2750         my $owner;
2751
2752         return undef unless $project;
2753         $git_dir = "$projectroot/$project";
2754
2755         if (!defined $gitweb_project_owner) {
2756                 git_get_project_list_from_file();
2757         }
2758
2759         if (exists $gitweb_project_owner->{$project}) {
2760                 $owner = $gitweb_project_owner->{$project};
2761         }
2762         if (!defined $owner){
2763                 $owner = git_get_project_config('owner');
2764         }
2765         if (!defined $owner) {
2766                 $owner = get_file_owner("$git_dir");
2767         }
2768
2769         return $owner;
2770 }
2771
2772 sub git_get_last_activity {
2773         my ($path) = @_;
2774         my $fd;
2775
2776         $git_dir = "$projectroot/$path";
2777         open($fd, "-|", git_cmd(), 'for-each-ref',
2778              '--format=%(committer)',
2779              '--sort=-committerdate',
2780              '--count=1',
2781              'refs/heads') or return;
2782         my $most_recent = <$fd>;
2783         close $fd or return;
2784         if (defined $most_recent &&
2785             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2786                 my $timestamp = $1;
2787                 my $age = time - $timestamp;
2788                 return ($age, age_string($age));
2789         }
2790         return (undef, undef);
2791 }
2792
2793 # Implementation note: when a single remote is wanted, we cannot use 'git
2794 # remote show -n' because that command always work (assuming it's a remote URL
2795 # if it's not defined), and we cannot use 'git remote show' because that would
2796 # try to make a network roundtrip. So the only way to find if that particular
2797 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2798 # and when we find what we want.
2799 sub git_get_remotes_list {
2800         my $wanted = shift;
2801         my %remotes = ();
2802
2803         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2804         return unless $fd;
2805         while (my $remote = <$fd>) {
2806                 chomp $remote;
2807                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2808                 next if $wanted and not $remote eq $wanted;
2809                 my ($url, $key) = ($1, $2);
2810
2811                 $remotes{$remote} ||= { 'heads' => () };
2812                 $remotes{$remote}{$key} = $url;
2813         }
2814         close $fd or return;
2815         return wantarray ? %remotes : \%remotes;
2816 }
2817
2818 # Takes a hash of remotes as first parameter and fills it by adding the
2819 # available remote heads for each of the indicated remotes.
2820 sub fill_remote_heads {
2821         my $remotes = shift;
2822         my @heads = map { "remotes/$_" } keys %$remotes;
2823         my @remoteheads = git_get_heads_list(undef, @heads);
2824         foreach my $remote (keys %$remotes) {
2825                 $remotes->{$remote}{'heads'} = [ grep {
2826                         $_->{'name'} =~ s!^$remote/!!
2827                         } @remoteheads ];
2828         }
2829 }
2830
2831 sub git_get_references {
2832         my $type = shift || "";
2833         my %refs;
2834         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2835         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2836         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2837                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2838                 or return;
2839
2840         while (my $line = <$fd>) {
2841                 chomp $line;
2842                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2843                         if (defined $refs{$1}) {
2844                                 push @{$refs{$1}}, $2;
2845                         } else {
2846                                 $refs{$1} = [ $2 ];
2847                         }
2848                 }
2849         }
2850         close $fd or return;
2851         return \%refs;
2852 }
2853
2854 sub git_get_rev_name_tags {
2855         my $hash = shift || return undef;
2856
2857         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2858                 or return;
2859         my $name_rev = <$fd>;
2860         close $fd;
2861
2862         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2863                 return $1;
2864         } else {
2865                 # catches also '$hash undefined' output
2866                 return undef;
2867         }
2868 }
2869
2870 ## ----------------------------------------------------------------------
2871 ## parse to hash functions
2872
2873 sub parse_date {
2874         my $epoch = shift;
2875         my $tz = shift || "-0000";
2876
2877         my %date;
2878         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2879         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2880         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2881         $date{'hour'} = $hour;
2882         $date{'minute'} = $min;
2883         $date{'mday'} = $mday;
2884         $date{'day'} = $days[$wday];
2885         $date{'month'} = $months[$mon];
2886         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2887                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2888         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2889                              $mday, $months[$mon], $hour ,$min;
2890         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2891                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2892
2893         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2894         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2895         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2896         $date{'hour_local'} = $hour;
2897         $date{'minute_local'} = $min;
2898         $date{'tz_local'} = $tz;
2899         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2900                                   1900+$year, $mon+1, $mday,
2901                                   $hour, $min, $sec, $tz);
2902         return %date;
2903 }
2904
2905 sub parse_tag {
2906         my $tag_id = shift;
2907         my %tag;
2908         my @comment;
2909
2910         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2911         $tag{'id'} = $tag_id;
2912         while (my $line = <$fd>) {
2913                 chomp $line;
2914                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2915                         $tag{'object'} = $1;
2916                 } elsif ($line =~ m/^type (.+)$/) {
2917                         $tag{'type'} = $1;
2918                 } elsif ($line =~ m/^tag (.+)$/) {
2919                         $tag{'name'} = $1;
2920                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2921                         $tag{'author'} = $1;
2922                         $tag{'author_epoch'} = $2;
2923                         $tag{'author_tz'} = $3;
2924                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2925                                 $tag{'author_name'}  = $1;
2926                                 $tag{'author_email'} = $2;
2927                         } else {
2928                                 $tag{'author_name'} = $tag{'author'};
2929                         }
2930                 } elsif ($line =~ m/--BEGIN/) {
2931                         push @comment, $line;
2932                         last;
2933                 } elsif ($line eq "") {
2934                         last;
2935                 }
2936         }
2937         push @comment, <$fd>;
2938         $tag{'comment'} = \@comment;
2939         close $fd or return;
2940         if (!defined $tag{'name'}) {
2941                 return
2942         };
2943         return %tag
2944 }
2945
2946 sub parse_commit_text {
2947         my ($commit_text, $withparents) = @_;
2948         my @commit_lines = split '\n', $commit_text;
2949         my %co;
2950
2951         pop @commit_lines; # Remove '\0'
2952
2953         if (! @commit_lines) {
2954                 return;
2955         }
2956
2957         my $header = shift @commit_lines;
2958         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2959                 return;
2960         }
2961         ($co{'id'}, my @parents) = split ' ', $header;
2962         while (my $line = shift @commit_lines) {
2963                 last if $line eq "\n";
2964                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2965                         $co{'tree'} = $1;
2966                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2967                         push @parents, $1;
2968                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2969                         $co{'author'} = to_utf8($1);
2970                         $co{'author_epoch'} = $2;
2971                         $co{'author_tz'} = $3;
2972                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2973                                 $co{'author_name'}  = $1;
2974                                 $co{'author_email'} = $2;
2975                         } else {
2976                                 $co{'author_name'} = $co{'author'};
2977                         }
2978                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2979                         $co{'committer'} = to_utf8($1);
2980                         $co{'committer_epoch'} = $2;
2981                         $co{'committer_tz'} = $3;
2982                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2983                                 $co{'committer_name'}  = $1;
2984                                 $co{'committer_email'} = $2;
2985                         } else {
2986                                 $co{'committer_name'} = $co{'committer'};
2987                         }
2988                 }
2989         }
2990         if (!defined $co{'tree'}) {
2991                 return;
2992         };
2993         $co{'parents'} = \@parents;
2994         $co{'parent'} = $parents[0];
2995
2996         foreach my $title (@commit_lines) {
2997                 $title =~ s/^    //;
2998                 if ($title ne "") {
2999                         $co{'title'} = chop_str($title, 80, 5);
3000                         # remove leading stuff of merges to make the interesting part visible
3001                         if (length($title) > 50) {
3002                                 $title =~ s/^Automatic //;
3003                                 $title =~ s/^merge (of|with) /Merge ... /i;
3004                                 if (length($title) > 50) {
3005                                         $title =~ s/(http|rsync):\/\///;
3006                                 }
3007                                 if (length($title) > 50) {
3008                                         $title =~ s/(master|www|rsync)\.//;
3009                                 }
3010                                 if (length($title) > 50) {
3011                                         $title =~ s/kernel.org:?//;
3012                                 }
3013                                 if (length($title) > 50) {
3014                                         $title =~ s/\/pub\/scm//;
3015                                 }
3016                         }
3017                         $co{'title_short'} = chop_str($title, 50, 5);
3018                         last;
3019                 }
3020         }
3021         if (! defined $co{'title'} || $co{'title'} eq "") {
3022                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3023         }
3024         # remove added spaces
3025         foreach my $line (@commit_lines) {
3026                 $line =~ s/^    //;
3027         }
3028         $co{'comment'} = \@commit_lines;
3029
3030         my $age = time - $co{'committer_epoch'};
3031         $co{'age'} = $age;
3032         $co{'age_string'} = age_string($age);
3033         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3034         if ($age > 60*60*24*7*2) {
3035                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3036                 $co{'age_string_age'} = $co{'age_string'};
3037         } else {
3038                 $co{'age_string_date'} = $co{'age_string'};
3039                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3040         }
3041         return %co;
3042 }
3043
3044 sub parse_commit {
3045         my ($commit_id) = @_;
3046         my %co;
3047
3048         local $/ = "\0";
3049
3050         open my $fd, "-|", git_cmd(), "rev-list",
3051                 "--parents",
3052                 "--header",
3053                 "--max-count=1",
3054                 $commit_id,
3055                 "--",
3056                 or die_error(500, "Open git-rev-list failed");
3057         %co = parse_commit_text(<$fd>, 1);
3058         close $fd;
3059
3060         return %co;
3061 }
3062
3063 sub parse_commits {
3064         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3065         my @cos;
3066
3067         $maxcount ||= 1;
3068         $skip ||= 0;
3069
3070         local $/ = "\0";
3071
3072         open my $fd, "-|", git_cmd(), "rev-list",
3073                 "--header",
3074                 @args,
3075                 ("--max-count=" . $maxcount),
3076                 ("--skip=" . $skip),
3077                 @extra_options,
3078                 $commit_id,
3079                 "--",
3080                 ($filename ? ($filename) : ())
3081                 or die_error(500, "Open git-rev-list failed");
3082         while (my $line = <$fd>) {
3083                 my %co = parse_commit_text($line);
3084                 push @cos, \%co;
3085         }
3086         close $fd;
3087
3088         return wantarray ? @cos : \@cos;
3089 }
3090
3091 # parse line of git-diff-tree "raw" output
3092 sub parse_difftree_raw_line {
3093         my $line = shift;
3094         my %res;
3095
3096         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3097         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3098         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3099                 $res{'from_mode'} = $1;
3100                 $res{'to_mode'} = $2;
3101                 $res{'from_id'} = $3;
3102                 $res{'to_id'} = $4;
3103                 $res{'status'} = $5;
3104                 $res{'similarity'} = $6;
3105                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3106                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3107                 } else {
3108                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3109                 }
3110         }
3111         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3112         # combined diff (for merge commit)
3113         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3114                 $res{'nparents'}  = length($1);
3115                 $res{'from_mode'} = [ split(' ', $2) ];
3116                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3117                 $res{'from_id'} = [ split(' ', $3) ];
3118                 $res{'to_id'} = pop @{$res{'from_id'}};
3119                 $res{'status'} = [ split('', $4) ];
3120                 $res{'to_file'} = unquote($5);
3121         }
3122         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3123         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3124                 $res{'commit'} = $1;
3125         }
3126
3127         return wantarray ? %res : \%res;
3128 }
3129
3130 # wrapper: return parsed line of git-diff-tree "raw" output
3131 # (the argument might be raw line, or parsed info)
3132 sub parsed_difftree_line {
3133         my $line_or_ref = shift;
3134
3135         if (ref($line_or_ref) eq "HASH") {
3136                 # pre-parsed (or generated by hand)
3137                 return $line_or_ref;
3138         } else {
3139                 return parse_difftree_raw_line($line_or_ref);
3140         }
3141 }
3142
3143 # parse line of git-ls-tree output
3144 sub parse_ls_tree_line {
3145         my $line = shift;
3146         my %opts = @_;
3147         my %res;
3148
3149         if ($opts{'-l'}) {
3150                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3151                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3152
3153                 $res{'mode'} = $1;
3154                 $res{'type'} = $2;
3155                 $res{'hash'} = $3;
3156                 $res{'size'} = $4;
3157                 if ($opts{'-z'}) {
3158                         $res{'name'} = $5;
3159                 } else {
3160                         $res{'name'} = unquote($5);
3161                 }
3162         } else {
3163                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3164                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3165
3166                 $res{'mode'} = $1;
3167                 $res{'type'} = $2;
3168                 $res{'hash'} = $3;
3169                 if ($opts{'-z'}) {
3170                         $res{'name'} = $4;
3171                 } else {
3172                         $res{'name'} = unquote($4);
3173                 }
3174         }
3175
3176         return wantarray ? %res : \%res;
3177 }
3178
3179 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3180 sub parse_from_to_diffinfo {
3181         my ($diffinfo, $from, $to, @parents) = @_;
3182
3183         if ($diffinfo->{'nparents'}) {
3184                 # combined diff
3185                 $from->{'file'} = [];
3186                 $from->{'href'} = [];
3187                 fill_from_file_info($diffinfo, @parents)
3188                         unless exists $diffinfo->{'from_file'};
3189                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3190                         $from->{'file'}[$i] =
3191                                 defined $diffinfo->{'from_file'}[$i] ?
3192                                         $diffinfo->{'from_file'}[$i] :
3193                                         $diffinfo->{'to_file'};
3194                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3195                                 $from->{'href'}[$i] = href(action=>"blob",
3196                                                            hash_base=>$parents[$i],
3197                                                            hash=>$diffinfo->{'from_id'}[$i],
3198                                                            file_name=>$from->{'file'}[$i]);
3199                         } else {
3200                                 $from->{'href'}[$i] = undef;
3201                         }
3202                 }
3203         } else {
3204                 # ordinary (not combined) diff
3205                 $from->{'file'} = $diffinfo->{'from_file'};
3206                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3207                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3208                                                hash=>$diffinfo->{'from_id'},
3209                                                file_name=>$from->{'file'});
3210                 } else {
3211                         delete $from->{'href'};
3212                 }
3213         }
3214
3215         $to->{'file'} = $diffinfo->{'to_file'};
3216         if (!is_deleted($diffinfo)) { # file exists in result
3217                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3218                                      hash=>$diffinfo->{'to_id'},
3219                                      file_name=>$to->{'file'});
3220         } else {
3221                 delete $to->{'href'};
3222         }
3223 }
3224
3225 ## ......................................................................
3226 ## parse to array of hashes functions
3227
3228 sub git_get_heads_list {
3229         my ($limit, @classes) = @_;
3230         @classes = ('heads') unless @classes;
3231         my @patterns = map { "refs/$_" } @classes;
3232         my @headslist;
3233
3234         open my $fd, '-|', git_cmd(), 'for-each-ref',
3235                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3236                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3237                 @patterns
3238                 or return;
3239         while (my $line = <$fd>) {
3240                 my %ref_item;
3241
3242                 chomp $line;
3243                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3244                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3245                 my ($committer, $epoch, $tz) =
3246                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3247                 $ref_item{'fullname'}  = $name;
3248                 $name =~ s!^refs/(?:head|remote)s/!!;
3249
3250                 $ref_item{'name'}  = $name;
3251                 $ref_item{'id'}    = $hash;
3252                 $ref_item{'title'} = $title || '(no commit message)';
3253                 $ref_item{'epoch'} = $epoch;
3254                 if ($epoch) {
3255                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3256                 } else {
3257                         $ref_item{'age'} = "unknown";
3258                 }
3259
3260                 push @headslist, \%ref_item;
3261         }
3262         close $fd;
3263
3264         return wantarray ? @headslist : \@headslist;
3265 }
3266
3267 sub git_get_tags_list {
3268         my $limit = shift;
3269         my @tagslist;
3270
3271         open my $fd, '-|', git_cmd(), 'for-each-ref',
3272                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3273                 '--format=%(objectname) %(objecttype) %(refname) '.
3274                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3275                 'refs/tags'
3276                 or return;
3277         while (my $line = <$fd>) {
3278                 my %ref_item;
3279
3280                 chomp $line;
3281                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3282                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3283                 my ($creator, $epoch, $tz) =
3284                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3285                 $ref_item{'fullname'} = $name;
3286                 $name =~ s!^refs/tags/!!;
3287
3288                 $ref_item{'type'} = $type;
3289                 $ref_item{'id'} = $id;
3290                 $ref_item{'name'} = $name;
3291                 if ($type eq "tag") {
3292                         $ref_item{'subject'} = $title;
3293                         $ref_item{'reftype'} = $reftype;
3294                         $ref_item{'refid'}   = $refid;
3295                 } else {
3296                         $ref_item{'reftype'} = $type;
3297                         $ref_item{'refid'}   = $id;
3298                 }
3299
3300                 if ($type eq "tag" || $type eq "commit") {
3301                         $ref_item{'epoch'} = $epoch;
3302                         if ($epoch) {
3303                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3304                         } else {
3305                                 $ref_item{'age'} = "unknown";
3306                         }
3307                 }
3308
3309                 push @tagslist, \%ref_item;
3310         }
3311         close $fd;
3312
3313         return wantarray ? @tagslist : \@tagslist;
3314 }
3315
3316 ## ----------------------------------------------------------------------
3317 ## filesystem-related functions
3318
3319 sub get_file_owner {
3320         my $path = shift;
3321
3322         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3323         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3324         if (!defined $gcos) {
3325                 return undef;
3326         }
3327         my $owner = $gcos;
3328         $owner =~ s/[,;].*$//;
3329         return to_utf8($owner);
3330 }
3331
3332 # assume that file exists
3333 sub insert_file {
3334         my $filename = shift;
3335
3336         open my $fd, '<', $filename;
3337         print map { to_utf8($_) } <$fd>;
3338         close $fd;
3339 }
3340
3341 ## ......................................................................
3342 ## mimetype related functions
3343
3344 sub mimetype_guess_file {
3345         my $filename = shift;
3346         my $mimemap = shift;
3347         -r $mimemap or return undef;
3348
3349         my %mimemap;
3350         open(my $mh, '<', $mimemap) or return undef;
3351         while (<$mh>) {
3352                 next if m/^#/; # skip comments
3353                 my ($mimetype, $exts) = split(/\t+/);
3354                 if (defined $exts) {
3355                         my @exts = split(/\s+/, $exts);
3356                         foreach my $ext (@exts) {
3357                                 $mimemap{$ext} = $mimetype;
3358                         }
3359                 }
3360         }
3361         close($mh);
3362
3363         $filename =~ /\.([^.]*)$/;
3364         return $mimemap{$1};
3365 }
3366
3367 sub mimetype_guess {
3368         my $filename = shift;
3369         my $mime;
3370         $filename =~ /\./ or return undef;
3371
3372         if ($mimetypes_file) {
3373                 my $file = $mimetypes_file;
3374                 if ($file !~ m!^/!) { # if it is relative path
3375                         # it is relative to project
3376                         $file = "$projectroot/$project/$file";
3377                 }
3378                 $mime = mimetype_guess_file($filename, $file);
3379         }
3380         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3381         return $mime;
3382 }
3383
3384 sub blob_mimetype {
3385         my $fd = shift;
3386         my $filename = shift;
3387
3388         if ($filename) {
3389                 my $mime = mimetype_guess($filename);
3390                 $mime and return $mime;
3391         }
3392
3393         # just in case
3394         return $default_blob_plain_mimetype unless $fd;
3395
3396         if (-T $fd) {
3397                 return 'text/plain';
3398         } elsif (! $filename) {
3399                 return 'application/octet-stream';
3400         } elsif ($filename =~ m/\.png$/i) {
3401                 return 'image/png';
3402         } elsif ($filename =~ m/\.gif$/i) {
3403                 return 'image/gif';
3404         } elsif ($filename =~ m/\.jpe?g$/i) {
3405                 return 'image/jpeg';
3406         } else {
3407                 return 'application/octet-stream';
3408         }
3409 }
3410
3411 sub blob_contenttype {
3412         my ($fd, $file_name, $type) = @_;
3413
3414         $type ||= blob_mimetype($fd, $file_name);
3415         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3416                 $type .= "; charset=$default_text_plain_charset";
3417         }
3418
3419         return $type;
3420 }
3421
3422 # guess file syntax for syntax highlighting; return undef if no highlighting
3423 # the name of syntax can (in the future) depend on syntax highlighter used
3424 sub guess_file_syntax {
3425         my ($highlight, $mimetype, $file_name) = @_;
3426         return undef unless ($highlight && defined $file_name);
3427         my $basename = basename($file_name, '.in');
3428         return $highlight_basename{$basename}
3429                 if exists $highlight_basename{$basename};
3430
3431         $basename =~ /\.([^.]*)$/;
3432         my $ext = $1 or return undef;
3433         return $highlight_ext{$ext}
3434                 if exists $highlight_ext{$ext};
3435
3436         return undef;
3437 }
3438
3439 # run highlighter and return FD of its output,
3440 # or return original FD if no highlighting
3441 sub run_highlighter {
3442         my ($fd, $highlight, $syntax) = @_;
3443         return $fd unless ($highlight && defined $syntax);
3444
3445         close $fd
3446                 or die_error(404, "Reading blob failed");
3447         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3448                   quote_command($highlight_bin).
3449                   " --xhtml --fragment --syntax $syntax |"
3450                 or die_error(500, "Couldn't open file or run syntax highlighter");
3451         return $fd;
3452 }
3453
3454 ## ======================================================================
3455 ## functions printing HTML: header, footer, error page
3456
3457 sub get_page_title {
3458         my $title = to_utf8($site_name);
3459
3460         return $title unless (defined $project);
3461         $title .= " - " . to_utf8($project);
3462
3463         return $title unless (defined $action);
3464         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3465
3466         return $title unless (defined $file_name);
3467         $title .= " - " . esc_path($file_name);
3468         if ($action eq "tree" && $file_name !~ m|/$|) {
3469                 $title .= "/";
3470         }
3471
3472         return $title;
3473 }
3474
3475 sub git_header_html {
3476         my $status = shift || "200 OK";
3477         my $expires = shift;
3478         my %opts = @_;
3479
3480         my $title = get_page_title();
3481         my $content_type;
3482         # require explicit support from the UA if we are to send the page as
3483         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3484         # we have to do this because MSIE sometimes globs '*/*', pretending to
3485         # support xhtml+xml but choking when it gets what it asked for.
3486         if (defined $cgi->http('HTTP_ACCEPT') &&
3487             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3488             $cgi->Accept('application/xhtml+xml') != 0) {
3489                 $content_type = 'application/xhtml+xml';
3490         } else {
3491                 $content_type = 'text/html';
3492         }
3493         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3494                            -status=> $status, -expires => $expires)
3495                 unless ($opts{'-no_http_header'});
3496         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3497         print <<EOF;
3498 <?xml version="1.0" encoding="utf-8"?>
3499 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3500 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3501 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3502 <!-- git core binaries version $git_version -->
3503 <head>
3504 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3505 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3506 <meta name="robots" content="index, nofollow"/>
3507 <title>$title</title>
3508 EOF
3509         # the stylesheet, favicon etc urls won't work correctly with path_info
3510         # unless we set the appropriate base URL
3511         if ($ENV{'PATH_INFO'}) {
3512                 print "<base href=\"".esc_url($base_url)."\" />\n";
3513         }
3514         # print out each stylesheet that exist, providing backwards capability
3515         # for those people who defined $stylesheet in a config file
3516         if (defined $stylesheet) {
3517                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3518         } else {
3519                 foreach my $stylesheet (@stylesheets) {
3520                         next unless $stylesheet;
3521                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3522                 }
3523         }
3524         if (defined $project) {
3525                 my %href_params = get_feed_info();
3526                 if (!exists $href_params{'-title'}) {
3527                         $href_params{'-title'} = 'log';
3528                 }
3529
3530                 foreach my $format qw(RSS Atom) {
3531                         my $type = lc($format);
3532                         my %link_attr = (
3533                                 '-rel' => 'alternate',
3534                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3535                                 '-type' => "application/$type+xml"
3536                         );
3537
3538                         $href_params{'action'} = $type;
3539                         $link_attr{'-href'} = href(%href_params);
3540                         print "<link ".
3541                               "rel=\"$link_attr{'-rel'}\" ".
3542                               "title=\"$link_attr{'-title'}\" ".
3543                               "href=\"$link_attr{'-href'}\" ".
3544                               "type=\"$link_attr{'-type'}\" ".
3545                               "/>\n";
3546
3547                         $href_params{'extra_options'} = '--no-merges';
3548                         $link_attr{'-href'} = href(%href_params);
3549                         $link_attr{'-title'} .= ' (no merges)';
3550                         print "<link ".
3551                               "rel=\"$link_attr{'-rel'}\" ".
3552                               "title=\"$link_attr{'-title'}\" ".
3553                               "href=\"$link_attr{'-href'}\" ".
3554                               "type=\"$link_attr{'-type'}\" ".
3555                               "/>\n";
3556                 }
3557
3558         } else {
3559                 printf('<link rel="alternate" title="%s projects list" '.
3560                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3561                        $site_name, href(project=>undef, action=>"project_index"));
3562                 printf('<link rel="alternate" title="%s projects feeds" '.
3563                        'href="%s" type="text/x-opml" />'."\n",
3564                        $site_name, href(project=>undef, action=>"opml"));
3565         }
3566         if (defined $favicon) {
3567                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3568         }
3569
3570         print "</head>\n" .
3571               "<body>\n";
3572
3573         if (defined $site_header && -f $site_header) {
3574                 insert_file($site_header);
3575         }
3576
3577         print "<div class=\"page_header\">\n" .
3578               $cgi->a({-href => esc_url($logo_url),
3579                        -title => $logo_label},
3580                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3581         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3582         if (defined $project) {
3583                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3584                 if (defined $action) {
3585                         my $action_print = $action ;
3586                         if (defined $opts{-action_extra}) {
3587                                 $action_print = $cgi->a({-href => href(action=>$action)},
3588                                         $action);
3589                         }
3590                         print " / $action_print";
3591                 }
3592                 if (defined $opts{-action_extra}) {
3593                         print " / $opts{-action_extra}";
3594                 }
3595                 print "\n";
3596         }
3597         print "</div>\n";
3598
3599         my $have_search = gitweb_check_feature('search');
3600         if (defined $project && $have_search) {
3601                 if (!defined $searchtext) {
3602                         $searchtext = "";
3603                 }
3604                 my $search_hash;
3605                 if (defined $hash_base) {
3606                         $search_hash = $hash_base;
3607                 } elsif (defined $hash) {
3608                         $search_hash = $hash;
3609                 } else {
3610                         $search_hash = "HEAD";
3611                 }
3612                 my $action = $my_uri;
3613                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3614                 if ($use_pathinfo) {
3615                         $action .= "/".esc_url($project);
3616                 }
3617                 print $cgi->startform(-method => "get", -action => $action) .
3618                       "<div class=\"search\">\n" .
3619                       (!$use_pathinfo &&
3620                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3621                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3622                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3623                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3624                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3625                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3626                       " search:\n",
3627                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3628                       "<span title=\"Extended regular expression\">" .
3629                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3630                                      -checked => $search_use_regexp) .
3631                       "</span>" .
3632                       "</div>" .
3633                       $cgi->end_form() . "\n";
3634         }
3635 }
3636
3637 sub git_footer_html {
3638         my $feed_class = 'rss_logo';
3639
3640         print "<div class=\"page_footer\">\n";
3641         if (defined $project) {
3642                 my $descr = git_get_project_description($project);
3643                 if (defined $descr) {
3644                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3645                 }
3646
3647                 my %href_params = get_feed_info();
3648                 if (!%href_params) {
3649                         $feed_class .= ' generic';
3650                 }
3651                 $href_params{'-title'} ||= 'log';
3652
3653                 foreach my $format qw(RSS Atom) {
3654                         $href_params{'action'} = lc($format);
3655                         print $cgi->a({-href => href(%href_params),
3656                                       -title => "$href_params{'-title'} $format feed",
3657                                       -class => $feed_class}, $format)."\n";
3658                 }
3659
3660         } else {
3661                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3662                               -class => $feed_class}, "OPML") . " ";
3663                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3664                               -class => $feed_class}, "TXT") . "\n";
3665         }
3666         print "</div>\n"; # class="page_footer"
3667
3668         if (defined $t0 && gitweb_check_feature('timed')) {
3669                 print "<div id=\"generating_info\">\n";
3670                 print 'This page took '.
3671                       '<span id="generating_time" class="time_span">'.
3672                       tv_interval($t0, [ gettimeofday() ]).
3673                       ' seconds </span>'.
3674                       ' and '.
3675                       '<span id="generating_cmd">'.
3676                       $number_of_git_cmds.
3677                       '</span> git commands '.
3678                       " to generate.\n";
3679                 print "</div>\n"; # class="page_footer"
3680         }
3681
3682         if (defined $site_footer && -f $site_footer) {
3683                 insert_file($site_footer);
3684         }
3685
3686         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3687         if (defined $action &&
3688             $action eq 'blame_incremental') {
3689                 print qq!<script type="text/javascript">\n!.
3690                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3691                       qq!           "!. href() .qq!");\n!.
3692                       qq!</script>\n!;
3693         } elsif (gitweb_check_feature('javascript-actions')) {
3694                 print qq!<script type="text/javascript">\n!.
3695                       qq!window.onload = fixLinks;\n!.
3696                       qq!</script>\n!;
3697         }
3698
3699         print "</body>\n" .
3700               "</html>";
3701 }
3702
3703 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3704 # Example: die_error(404, 'Hash not found')
3705 # By convention, use the following status codes (as defined in RFC 2616):
3706 # 400: Invalid or missing CGI parameters, or
3707 #      requested object exists but has wrong type.
3708 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3709 #      this server or project.
3710 # 404: Requested object/revision/project doesn't exist.
3711 # 500: The server isn't configured properly, or
3712 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3713 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3714 # 503: The server is currently unavailable (because it is overloaded,
3715 #      or down for maintenance).  Generally, this is a temporary state.
3716 sub die_error {
3717         my $status = shift || 500;
3718         my $error = esc_html(shift) || "Internal Server Error";
3719         my $extra = shift;
3720         my %opts = @_;
3721
3722         my %http_responses = (
3723                 400 => '400 Bad Request',
3724                 403 => '403 Forbidden',
3725                 404 => '404 Not Found',
3726                 500 => '500 Internal Server Error',
3727                 503 => '503 Service Unavailable',
3728         );
3729         git_header_html($http_responses{$status}, undef, %opts);
3730         print <<EOF;
3731 <div class="page_body">
3732 <br /><br />
3733 $status - $error
3734 <br />
3735 EOF
3736         if (defined $extra) {
3737                 print "<hr />\n" .
3738                       "$extra\n";
3739         }
3740         print "</div>\n";
3741
3742         git_footer_html();
3743         goto DONE_GITWEB
3744                 unless ($opts{'-error_handler'});
3745 }
3746
3747 ## ----------------------------------------------------------------------
3748 ## functions printing or outputting HTML: navigation
3749
3750 sub git_print_page_nav {
3751         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3752         $extra = '' if !defined $extra; # pager or formats
3753
3754         my @navs = qw(summary shortlog log commit commitdiff tree);
3755         if ($suppress) {
3756                 @navs = grep { $_ ne $suppress } @navs;
3757         }
3758
3759         my %arg = map { $_ => {action=>$_} } @navs;
3760         if (defined $head) {
3761                 for (qw(commit commitdiff)) {
3762                         $arg{$_}{'hash'} = $head;
3763                 }
3764                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3765                         for (qw(shortlog log)) {
3766                                 $arg{$_}{'hash'} = $head;
3767                         }
3768                 }
3769         }
3770
3771         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3772         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3773
3774         my @actions = gitweb_get_feature('actions');
3775         my %repl = (
3776                 '%' => '%',
3777                 'n' => $project,         # project name
3778                 'f' => $git_dir,         # project path within filesystem
3779                 'h' => $treehead || '',  # current hash ('h' parameter)
3780                 'b' => $treebase || '',  # hash base ('hb' parameter)
3781         );
3782         while (@actions) {
3783                 my ($label, $link, $pos) = splice(@actions,0,3);
3784                 # insert
3785                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3786                 # munch munch
3787                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3788                 $arg{$label}{'_href'} = $link;
3789         }
3790
3791         print "<div class=\"page_nav\">\n" .
3792                 (join " | ",
3793                  map { $_ eq $current ?
3794                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3795                  } @navs);
3796         print "<br/>\n$extra<br/>\n" .
3797               "</div>\n";
3798 }
3799
3800 # returns a submenu for the nagivation of the refs views (tags, heads,
3801 # remotes) with the current view disabled and the remotes view only
3802 # available if the feature is enabled
3803 sub format_ref_views {
3804         my ($current) = @_;
3805         my @ref_views = qw{tags heads};
3806         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3807         return join " | ", map {
3808                 $_ eq $current ? $_ :
3809                 $cgi->a({-href => href(action=>$_)}, $_)
3810         } @ref_views
3811 }
3812
3813 sub format_paging_nav {
3814         my ($action, $page, $has_next_link) = @_;
3815         my $paging_nav;
3816
3817
3818         if ($page > 0) {
3819                 $paging_nav .=
3820                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3821                         " &sdot; " .
3822                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3823                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3824         } else {
3825                 $paging_nav .= "first &sdot; prev";
3826         }
3827
3828         if ($has_next_link) {
3829                 $paging_nav .= " &sdot; " .
3830                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3831                                  -accesskey => "n", -title => "Alt-n"}, "next");
3832         } else {
3833                 $paging_nav .= " &sdot; next";
3834         }
3835
3836         return $paging_nav;
3837 }
3838
3839 ## ......................................................................
3840 ## functions printing or outputting HTML: div
3841
3842 sub git_print_header_div {
3843         my ($action, $title, $hash, $hash_base) = @_;
3844         my %args = ();
3845
3846         $args{'action'} = $action;
3847         $args{'hash'} = $hash if $hash;
3848         $args{'hash_base'} = $hash_base if $hash_base;
3849
3850         print "<div class=\"header\">\n" .
3851               $cgi->a({-href => href(%args), -class => "title"},
3852               $title ? $title : $action) .
3853               "\n</div>\n";
3854 }
3855
3856 sub format_repo_url {
3857         my ($name, $url) = @_;
3858         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3859 }
3860
3861 # Group output by placing it in a DIV element and adding a header.
3862 # Options for start_div() can be provided by passing a hash reference as the
3863 # first parameter to the function.
3864 # Options to git_print_header_div() can be provided by passing an array
3865 # reference. This must follow the options to start_div if they are present.
3866 # The content can be a scalar, which is output as-is, a scalar reference, which
3867 # is output after html escaping, an IO handle passed either as *handle or
3868 # *handle{IO}, or a function reference. In the latter case all following
3869 # parameters will be taken as argument to the content function call.
3870 sub git_print_section {
3871         my ($div_args, $header_args, $content);
3872         my $arg = shift;
3873         if (ref($arg) eq 'HASH') {
3874                 $div_args = $arg;
3875                 $arg = shift;
3876         }
3877         if (ref($arg) eq 'ARRAY') {
3878                 $header_args = $arg;
3879                 $arg = shift;
3880         }
3881         $content = $arg;
3882
3883         print $cgi->start_div($div_args);
3884         git_print_header_div(@$header_args);
3885
3886         if (ref($content) eq 'CODE') {
3887                 $content->(@_);
3888         } elsif (ref($content) eq 'SCALAR') {
3889                 print esc_html($$content);
3890         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3891                 print <$content>;
3892         } elsif (!ref($content) && defined($content)) {
3893                 print $content;
3894         }
3895
3896         print $cgi->end_div;
3897 }
3898
3899 sub print_local_time {
3900         print format_local_time(@_);
3901 }
3902
3903 sub format_local_time {
3904         my $localtime = '';
3905         my %date = @_;
3906         if ($date{'hour_local'} < 6) {
3907                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3908                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3909         } else {
3910                 $localtime .= sprintf(" (%02d:%02d %s)",
3911                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3912         }
3913
3914         return $localtime;
3915 }
3916
3917 # Outputs the author name and date in long form
3918 sub git_print_authorship {
3919         my $co = shift;
3920         my %opts = @_;
3921         my $tag = $opts{-tag} || 'div';
3922         my $author = $co->{'author_name'};
3923
3924         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3925         print "<$tag class=\"author_date\">" .
3926               format_search_author($author, "author", esc_html($author)) .
3927               " [$ad{'rfc2822'}";
3928         print_local_time(%ad) if ($opts{-localtime});
3929         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3930                   . "</$tag>\n";
3931 }
3932
3933 # Outputs table rows containing the full author or committer information,
3934 # in the format expected for 'commit' view (& similar).
3935 # Parameters are a commit hash reference, followed by the list of people
3936 # to output information for. If the list is empty it defaults to both
3937 # author and committer.
3938 sub git_print_authorship_rows {
3939         my $co = shift;
3940         # too bad we can't use @people = @_ || ('author', 'committer')
3941         my @people = @_;
3942         @people = ('author', 'committer') unless @people;
3943         foreach my $who (@people) {
3944                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3945                 print "<tr><td>$who</td><td>" .
3946                       format_search_author($co->{"${who}_name"}, $who,
3947                                esc_html($co->{"${who}_name"})) . " " .
3948                       format_search_author($co->{"${who}_email"}, $who,
3949                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3950                       "</td><td rowspan=\"2\">" .
3951                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3952                       "</td></tr>\n" .
3953                       "<tr>" .
3954                       "<td></td><td> $wd{'rfc2822'}";
3955                 print_local_time(%wd);
3956                 print "</td>" .
3957                       "</tr>\n";
3958         }
3959 }
3960
3961 sub git_print_page_path {
3962         my $name = shift;
3963         my $type = shift;
3964         my $hb = shift;
3965
3966
3967         print "<div class=\"page_path\">";
3968         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3969                       -title => 'tree root'}, to_utf8("[$project]"));
3970         print " / ";
3971         if (defined $name) {
3972                 my @dirname = split '/', $name;
3973                 my $basename = pop @dirname;
3974                 my $fullname = '';
3975
3976                 foreach my $dir (@dirname) {
3977                         $fullname .= ($fullname ? '/' : '') . $dir;
3978                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3979                                                      hash_base=>$hb),
3980                                       -title => $fullname}, esc_path($dir));
3981                         print " / ";
3982                 }
3983                 if (defined $type && $type eq 'blob') {
3984                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3985                                                      hash_base=>$hb),
3986                                       -title => $name}, esc_path($basename));
3987                 } elsif (defined $type && $type eq 'tree') {
3988                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3989                                                      hash_base=>$hb),
3990                                       -title => $name}, esc_path($basename));
3991                         print " / ";
3992                 } else {
3993                         print esc_path($basename);
3994                 }
3995         }
3996         print "<br/></div>\n";
3997 }
3998
3999 sub git_print_log {
4000         my $log = shift;
4001         my %opts = @_;
4002
4003         if ($opts{'-remove_title'}) {
4004                 # remove title, i.e. first line of log
4005                 shift @$log;
4006         }
4007         # remove leading empty lines
4008         while (defined $log->[0] && $log->[0] eq "") {
4009                 shift @$log;
4010         }
4011
4012         # print log
4013         my $signoff = 0;
4014         my $empty = 0;
4015         foreach my $line (@$log) {
4016                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4017                         $signoff = 1;
4018                         $empty = 0;
4019                         if (! $opts{'-remove_signoff'}) {
4020                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4021                                 next;
4022                         } else {
4023                                 # remove signoff lines
4024                                 next;
4025                         }
4026                 } else {
4027                         $signoff = 0;
4028                 }
4029
4030                 # print only one empty line
4031                 # do not print empty line after signoff
4032                 if ($line eq "") {
4033                         next if ($empty || $signoff);
4034                         $empty = 1;
4035                 } else {
4036                         $empty = 0;
4037                 }
4038
4039                 print format_log_line_html($line) . "<br/>\n";
4040         }
4041
4042         if ($opts{'-final_empty_line'}) {
4043                 # end with single empty line
4044                 print "<br/>\n" unless $empty;
4045         }
4046 }
4047
4048 # return link target (what link points to)
4049 sub git_get_link_target {
4050         my $hash = shift;
4051         my $link_target;
4052
4053         # read link
4054         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4055                 or return;
4056         {
4057                 local $/ = undef;
4058                 $link_target = <$fd>;
4059         }
4060         close $fd
4061                 or return;
4062
4063         return $link_target;
4064 }
4065
4066 # given link target, and the directory (basedir) the link is in,
4067 # return target of link relative to top directory (top tree);
4068 # return undef if it is not possible (including absolute links).
4069 sub normalize_link_target {
4070         my ($link_target, $basedir) = @_;
4071
4072         # absolute symlinks (beginning with '/') cannot be normalized
4073         return if (substr($link_target, 0, 1) eq '/');
4074
4075         # normalize link target to path from top (root) tree (dir)
4076         my $path;
4077         if ($basedir) {
4078                 $path = $basedir . '/' . $link_target;
4079         } else {
4080                 # we are in top (root) tree (dir)
4081                 $path = $link_target;
4082         }
4083
4084         # remove //, /./, and /../
4085         my @path_parts;
4086         foreach my $part (split('/', $path)) {
4087                 # discard '.' and ''
4088                 next if (!$part || $part eq '.');
4089                 # handle '..'
4090                 if ($part eq '..') {
4091                         if (@path_parts) {
4092                                 pop @path_parts;
4093                         } else {
4094                                 # link leads outside repository (outside top dir)
4095                                 return;
4096                         }
4097                 } else {
4098                         push @path_parts, $part;
4099                 }
4100         }
4101         $path = join('/', @path_parts);
4102
4103         return $path;
4104 }
4105
4106 # print tree entry (row of git_tree), but without encompassing <tr> element
4107 sub git_print_tree_entry {
4108         my ($t, $basedir, $hash_base, $have_blame) = @_;
4109
4110         my %base_key = ();
4111         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4112
4113         # The format of a table row is: mode list link.  Where mode is
4114         # the mode of the entry, list is the name of the entry, an href,
4115         # and link is the action links of the entry.
4116
4117         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4118         if (exists $t->{'size'}) {
4119                 print "<td class=\"size\">$t->{'size'}</td>\n";
4120         }
4121         if ($t->{'type'} eq "blob") {
4122                 print "<td class=\"list\">" .
4123                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4124                                                file_name=>"$basedir$t->{'name'}", %base_key),
4125                                 -class => "list"}, esc_path($t->{'name'}));
4126                 if (S_ISLNK(oct $t->{'mode'})) {
4127                         my $link_target = git_get_link_target($t->{'hash'});
4128                         if ($link_target) {
4129                                 my $norm_target = normalize_link_target($link_target, $basedir);
4130                                 if (defined $norm_target) {
4131                                         print " -> " .
4132                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4133                                                                      file_name=>$norm_target),
4134                                                        -title => $norm_target}, esc_path($link_target));
4135                                 } else {
4136                                         print " -> " . esc_path($link_target);
4137                                 }
4138                         }
4139                 }
4140                 print "</td>\n";
4141                 print "<td class=\"link\">";
4142                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4143                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4144                               "blob");
4145                 if ($have_blame) {
4146                         print " | " .
4147                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4148                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4149                                       "blame");
4150                 }
4151                 if (defined $hash_base) {
4152                         print " | " .
4153                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4154                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4155                                       "history");
4156                 }
4157                 print " | " .
4158                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4159                                                file_name=>"$basedir$t->{'name'}")},
4160                                 "raw");
4161                 print "</td>\n";
4162
4163         } elsif ($t->{'type'} eq "tree") {
4164                 print "<td class=\"list\">";
4165                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4166                                              file_name=>"$basedir$t->{'name'}",
4167                                              %base_key)},
4168                               esc_path($t->{'name'}));
4169                 print "</td>\n";
4170                 print "<td class=\"link\">";
4171                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4172                                              file_name=>"$basedir$t->{'name'}",
4173                                              %base_key)},
4174                               "tree");
4175                 if (defined $hash_base) {
4176                         print " | " .
4177                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4178                                                      file_name=>"$basedir$t->{'name'}")},
4179                                       "history");
4180                 }
4181                 print "</td>\n";
4182         } else {
4183                 # unknown object: we can only present history for it
4184                 # (this includes 'commit' object, i.e. submodule support)
4185                 print "<td class=\"list\">" .
4186                       esc_path($t->{'name'}) .
4187                       "</td>\n";
4188                 print "<td class=\"link\">";
4189                 if (defined $hash_base) {
4190                         print $cgi->a({-href => href(action=>"history",
4191                                                      hash_base=>$hash_base,
4192                                                      file_name=>"$basedir$t->{'name'}")},
4193                                       "history");
4194                 }
4195                 print "</td>\n";
4196         }
4197 }
4198
4199 ## ......................................................................
4200 ## functions printing large fragments of HTML
4201
4202 # get pre-image filenames for merge (combined) diff
4203 sub fill_from_file_info {
4204         my ($diff, @parents) = @_;
4205
4206         $diff->{'from_file'} = [ ];
4207         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4208         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4209                 if ($diff->{'status'}[$i] eq 'R' ||
4210                     $diff->{'status'}[$i] eq 'C') {
4211                         $diff->{'from_file'}[$i] =
4212                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4213                 }
4214         }
4215
4216         return $diff;
4217 }
4218
4219 # is current raw difftree line of file deletion
4220 sub is_deleted {
4221         my $diffinfo = shift;
4222
4223         return $diffinfo->{'to_id'} eq ('0' x 40);
4224 }
4225
4226 # does patch correspond to [previous] difftree raw line
4227 # $diffinfo  - hashref of parsed raw diff format
4228 # $patchinfo - hashref of parsed patch diff format
4229 #              (the same keys as in $diffinfo)
4230 sub is_patch_split {
4231         my ($diffinfo, $patchinfo) = @_;
4232
4233         return defined $diffinfo && defined $patchinfo
4234                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4235 }
4236
4237
4238 sub git_difftree_body {
4239         my ($difftree, $hash, @parents) = @_;
4240         my ($parent) = $parents[0];
4241         my $have_blame = gitweb_check_feature('blame');
4242         print "<div class=\"list_head\">\n";
4243         if ($#{$difftree} > 10) {
4244                 print(($#{$difftree} + 1) . " files changed:\n");
4245         }
4246         print "</div>\n";
4247
4248         print "<table class=\"" .
4249               (@parents > 1 ? "combined " : "") .
4250               "diff_tree\">\n";
4251
4252         # header only for combined diff in 'commitdiff' view
4253         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4254         if ($has_header) {
4255                 # table header
4256                 print "<thead><tr>\n" .
4257                        "<th></th><th></th>\n"; # filename, patchN link
4258                 for (my $i = 0; $i < @parents; $i++) {
4259                         my $par = $parents[$i];
4260                         print "<th>" .
4261                               $cgi->a({-href => href(action=>"commitdiff",
4262                                                      hash=>$hash, hash_parent=>$par),
4263                                        -title => 'commitdiff to parent number ' .
4264                                                   ($i+1) . ': ' . substr($par,0,7)},
4265                                       $i+1) .
4266                               "&nbsp;</th>\n";
4267                 }
4268                 print "</tr></thead>\n<tbody>\n";
4269         }
4270
4271         my $alternate = 1;
4272         my $patchno = 0;
4273         foreach my $line (@{$difftree}) {
4274                 my $diff = parsed_difftree_line($line);
4275
4276                 if ($alternate) {
4277                         print "<tr class=\"dark\">\n";
4278                 } else {
4279                         print "<tr class=\"light\">\n";
4280                 }
4281                 $alternate ^= 1;
4282
4283                 if (exists $diff->{'nparents'}) { # combined diff
4284
4285                         fill_from_file_info($diff, @parents)
4286                                 unless exists $diff->{'from_file'};
4287
4288                         if (!is_deleted($diff)) {
4289                                 # file exists in the result (child) commit
4290                                 print "<td>" .
4291                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4292                                                              file_name=>$diff->{'to_file'},
4293                                                              hash_base=>$hash),
4294                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4295                                       "</td>\n";
4296                         } else {
4297                                 print "<td>" .
4298                                       esc_path($diff->{'to_file'}) .
4299                                       "</td>\n";
4300                         }
4301
4302                         if ($action eq 'commitdiff') {
4303                                 # link to patch
4304                                 $patchno++;
4305                                 print "<td class=\"link\">" .
4306                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4307                                       " | " .
4308                                       "</td>\n";
4309                         }
4310
4311                         my $has_history = 0;
4312                         my $not_deleted = 0;
4313                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4314                                 my $hash_parent = $parents[$i];
4315                                 my $from_hash = $diff->{'from_id'}[$i];
4316                                 my $from_path = $diff->{'from_file'}[$i];
4317                                 my $status = $diff->{'status'}[$i];
4318
4319                                 $has_history ||= ($status ne 'A');
4320                                 $not_deleted ||= ($status ne 'D');
4321
4322                                 if ($status eq 'A') {
4323                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4324                                 } elsif ($status eq 'D') {
4325                                         print "<td class=\"link\">" .
4326                                               $cgi->a({-href => href(action=>"blob",
4327                                                                      hash_base=>$hash,
4328                                                                      hash=>$from_hash,
4329                                                                      file_name=>$from_path)},
4330                                                       "blob" . ($i+1)) .
4331                                               " | </td>\n";
4332                                 } else {
4333                                         if ($diff->{'to_id'} eq $from_hash) {
4334                                                 print "<td class=\"link nochange\">";
4335                                         } else {
4336                                                 print "<td class=\"link\">";
4337                                         }
4338                                         print $cgi->a({-href => href(action=>"blobdiff",
4339                                                                      hash=>$diff->{'to_id'},
4340                                                                      hash_parent=>$from_hash,
4341                                                                      hash_base=>$hash,
4342                                                                      hash_parent_base=>$hash_parent,
4343                                                                      file_name=>$diff->{'to_file'},
4344                                                                      file_parent=>$from_path)},
4345                                                       "diff" . ($i+1)) .
4346                                               " | </td>\n";
4347                                 }
4348                         }
4349
4350                         print "<td class=\"link\">";
4351                         if ($not_deleted) {
4352                                 print $cgi->a({-href => href(action=>"blob",
4353                                                              hash=>$diff->{'to_id'},
4354                                                              file_name=>$diff->{'to_file'},
4355                                                              hash_base=>$hash)},
4356                                               "blob");
4357                                 print " | " if ($has_history);
4358                         }
4359                         if ($has_history) {
4360                                 print $cgi->a({-href => href(action=>"history",
4361                                                              file_name=>$diff->{'to_file'},
4362                                                              hash_base=>$hash)},
4363                                               "history");
4364                         }
4365                         print "</td>\n";
4366
4367                         print "</tr>\n";
4368                         next; # instead of 'else' clause, to avoid extra indent
4369                 }
4370                 # else ordinary diff
4371
4372                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4373                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4374                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4375                         $to_mode_oct = oct $diff->{'to_mode'};
4376                         if (S_ISREG($to_mode_oct)) { # only for regular file
4377                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4378                         }
4379                         $to_file_type = file_type($diff->{'to_mode'});
4380                 }
4381                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4382                         $from_mode_oct = oct $diff->{'from_mode'};
4383                         if (S_ISREG($to_mode_oct)) { # only for regular file
4384                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4385                         }
4386                         $from_file_type = file_type($diff->{'from_mode'});
4387                 }
4388
4389                 if ($diff->{'status'} eq "A") { # created
4390                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4391                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4392                         $mode_chng   .= "]</span>";
4393                         print "<td>";
4394                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4395                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4396                                       -class => "list"}, esc_path($diff->{'file'}));
4397                         print "</td>\n";
4398                         print "<td>$mode_chng</td>\n";
4399                         print "<td class=\"link\">";
4400                         if ($action eq 'commitdiff') {
4401                                 # link to patch
4402                                 $patchno++;
4403                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4404                                 print " | ";
4405                         }
4406                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4407                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4408                                       "blob");
4409                         print "</td>\n";
4410
4411                 } elsif ($diff->{'status'} eq "D") { # deleted
4412                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4413                         print "<td>";
4414                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4415                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4416                                        -class => "list"}, esc_path($diff->{'file'}));
4417                         print "</td>\n";
4418                         print "<td>$mode_chng</td>\n";
4419                         print "<td class=\"link\">";
4420                         if ($action eq 'commitdiff') {
4421                                 # link to patch
4422                                 $patchno++;
4423                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4424                                 print " | ";
4425                         }
4426                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4427                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4428                                       "blob") . " | ";
4429                         if ($have_blame) {
4430                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4431                                                              file_name=>$diff->{'file'})},
4432                                               "blame") . " | ";
4433                         }
4434                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4435                                                      file_name=>$diff->{'file'})},
4436                                       "history");
4437                         print "</td>\n";
4438
4439                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4440                         my $mode_chnge = "";
4441                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4442                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4443                                 if ($from_file_type ne $to_file_type) {
4444                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4445                                 }
4446                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4447                                         if ($from_mode_str && $to_mode_str) {
4448                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4449                                         } elsif ($to_mode_str) {
4450                                                 $mode_chnge .= " mode: $to_mode_str";
4451                                         }
4452                                 }
4453                                 $mode_chnge .= "]</span>\n";
4454                         }
4455                         print "<td>";
4456                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4457                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4458                                       -class => "list"}, esc_path($diff->{'file'}));
4459                         print "</td>\n";
4460                         print "<td>$mode_chnge</td>\n";
4461                         print "<td class=\"link\">";
4462                         if ($action eq 'commitdiff') {
4463                                 # link to patch
4464                                 $patchno++;
4465                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4466                                       " | ";
4467                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4468                                 # "commit" view and modified file (not onlu mode changed)
4469                                 print $cgi->a({-href => href(action=>"blobdiff",
4470                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4471                                                              hash_base=>$hash, hash_parent_base=>$parent,
4472                                                              file_name=>$diff->{'file'})},
4473                                               "diff") .
4474                                       " | ";
4475                         }
4476                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4477                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4478                                        "blob") . " | ";
4479                         if ($have_blame) {
4480                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4481                                                              file_name=>$diff->{'file'})},
4482                                               "blame") . " | ";
4483                         }
4484                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4485                                                      file_name=>$diff->{'file'})},
4486                                       "history");
4487                         print "</td>\n";
4488
4489                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4490                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4491                         my $nstatus = $status_name{$diff->{'status'}};
4492                         my $mode_chng = "";
4493                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4494                                 # mode also for directories, so we cannot use $to_mode_str
4495                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4496                         }
4497                         print "<td>" .
4498                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4499                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4500                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4501                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4502                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4503                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4504                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4505                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4506                               "<td class=\"link\">";
4507                         if ($action eq 'commitdiff') {
4508                                 # link to patch
4509                                 $patchno++;
4510                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4511                                       " | ";
4512                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4513                                 # "commit" view and modified file (not only pure rename or copy)
4514                                 print $cgi->a({-href => href(action=>"blobdiff",
4515                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4516                                                              hash_base=>$hash, hash_parent_base=>$parent,
4517                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4518                                               "diff") .
4519                                       " | ";
4520                         }
4521                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4522                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4523                                       "blob") . " | ";
4524                         if ($have_blame) {
4525                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4526                                                              file_name=>$diff->{'to_file'})},
4527                                               "blame") . " | ";
4528                         }
4529                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4530                                                     file_name=>$diff->{'to_file'})},
4531                                       "history");
4532                         print "</td>\n";
4533
4534                 } # we should not encounter Unmerged (U) or Unknown (X) status
4535                 print "</tr>\n";
4536         }
4537         print "</tbody>" if $has_header;
4538         print "</table>\n";
4539 }
4540
4541 sub git_patchset_body {
4542         my ($fd, $difftree, $hash, @hash_parents) = @_;
4543         my ($hash_parent) = $hash_parents[0];
4544
4545         my $is_combined = (@hash_parents > 1);
4546         my $patch_idx = 0;
4547         my $patch_number = 0;
4548         my $patch_line;
4549         my $diffinfo;
4550         my $to_name;
4551         my (%from, %to);
4552
4553         print "<div class=\"patchset\">\n";
4554
4555         # skip to first patch
4556         while ($patch_line = <$fd>) {
4557                 chomp $patch_line;
4558
4559                 last if ($patch_line =~ m/^diff /);
4560         }
4561
4562  PATCH:
4563         while ($patch_line) {
4564
4565                 # parse "git diff" header line
4566                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4567                         # $1 is from_name, which we do not use
4568                         $to_name = unquote($2);
4569                         $to_name =~ s!^b/!!;
4570                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4571                         # $1 is 'cc' or 'combined', which we do not use
4572                         $to_name = unquote($2);
4573                 } else {
4574                         $to_name = undef;
4575                 }
4576
4577                 # check if current patch belong to current raw line
4578                 # and parse raw git-diff line if needed
4579                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4580                         # this is continuation of a split patch
4581                         print "<div class=\"patch cont\">\n";
4582                 } else {
4583                         # advance raw git-diff output if needed
4584                         $patch_idx++ if defined $diffinfo;
4585
4586                         # read and prepare patch information
4587                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4588
4589                         # compact combined diff output can have some patches skipped
4590                         # find which patch (using pathname of result) we are at now;
4591                         if ($is_combined) {
4592                                 while ($to_name ne $diffinfo->{'to_file'}) {
4593                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4594                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4595                                               "</div>\n";  # class="patch"
4596
4597                                         $patch_idx++;
4598                                         $patch_number++;
4599
4600                                         last if $patch_idx > $#$difftree;
4601                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4602                                 }
4603                         }
4604
4605                         # modifies %from, %to hashes
4606                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4607
4608                         # this is first patch for raw difftree line with $patch_idx index
4609                         # we index @$difftree array from 0, but number patches from 1
4610                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4611                 }
4612
4613                 # git diff header
4614                 #assert($patch_line =~ m/^diff /) if DEBUG;
4615                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4616                 $patch_number++;
4617                 # print "git diff" header
4618                 print format_git_diff_header_line($patch_line, $diffinfo,
4619                                                   \%from, \%to);
4620
4621                 # print extended diff header
4622                 print "<div class=\"diff extended_header\">\n";
4623         EXTENDED_HEADER:
4624                 while ($patch_line = <$fd>) {
4625                         chomp $patch_line;
4626
4627                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4628
4629                         print format_extended_diff_header_line($patch_line, $diffinfo,
4630                                                                \%from, \%to);
4631                 }
4632                 print "</div>\n"; # class="diff extended_header"
4633
4634                 # from-file/to-file diff header
4635                 if (! $patch_line) {
4636                         print "</div>\n"; # class="patch"
4637                         last PATCH;
4638                 }
4639                 next PATCH if ($patch_line =~ m/^diff /);
4640                 #assert($patch_line =~ m/^---/) if DEBUG;
4641
4642                 my $last_patch_line = $patch_line;
4643                 $patch_line = <$fd>;
4644                 chomp $patch_line;
4645                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4646
4647                 print format_diff_from_to_header($last_patch_line, $patch_line,
4648                                                  $diffinfo, \%from, \%to,
4649                                                  @hash_parents);
4650
4651                 # the patch itself
4652         LINE:
4653                 while ($patch_line = <$fd>) {
4654                         chomp $patch_line;
4655
4656                         next PATCH if ($patch_line =~ m/^diff /);
4657
4658                         print format_diff_line($patch_line, \%from, \%to);
4659                 }
4660
4661         } continue {
4662                 print "</div>\n"; # class="patch"
4663         }
4664
4665         # for compact combined (--cc) format, with chunk and patch simplification
4666         # the patchset might be empty, but there might be unprocessed raw lines
4667         for (++$patch_idx if $patch_number > 0;
4668              $patch_idx < @$difftree;
4669              ++$patch_idx) {
4670                 # read and prepare patch information
4671                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4672
4673                 # generate anchor for "patch" links in difftree / whatchanged part
4674                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4675                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4676                       "</div>\n";  # class="patch"
4677
4678                 $patch_number++;
4679         }
4680
4681         if ($patch_number == 0) {
4682                 if (@hash_parents > 1) {
4683                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4684                 } else {
4685                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4686                 }
4687         }
4688
4689         print "</div>\n"; # class="patchset"
4690 }
4691
4692 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4693
4694 # fills project list info (age, description, owner, forks) for each
4695 # project in the list, removing invalid projects from returned list
4696 # NOTE: modifies $projlist, but does not remove entries from it
4697 sub fill_project_list_info {
4698         my ($projlist, $check_forks) = @_;
4699         my @projects;
4700
4701         my $show_ctags = gitweb_check_feature('ctags');
4702  PROJECT:
4703         foreach my $pr (@$projlist) {
4704                 my (@activity) = git_get_last_activity($pr->{'path'});
4705                 unless (@activity) {
4706                         next PROJECT;
4707                 }
4708                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4709                 if (!defined $pr->{'descr'}) {
4710                         my $descr = git_get_project_description($pr->{'path'}) || "";
4711                         $descr = to_utf8($descr);
4712                         $pr->{'descr_long'} = $descr;
4713                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4714                 }
4715                 if (!defined $pr->{'owner'}) {
4716                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4717                 }
4718                 if ($check_forks) {
4719                         my $pname = $pr->{'path'};
4720                         if (($pname =~ s/\.git$//) &&
4721                             ($pname !~ /\/$/) &&
4722                             (-d "$projectroot/$pname")) {
4723                                 $pr->{'forks'} = "-d $projectroot/$pname";
4724                         } else {
4725                                 $pr->{'forks'} = 0;
4726                         }
4727                 }
4728                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4729                 push @projects, $pr;
4730         }
4731
4732         return @projects;
4733 }
4734
4735 # print 'sort by' <th> element, generating 'sort by $name' replay link
4736 # if that order is not selected
4737 sub print_sort_th {
4738         print format_sort_th(@_);
4739 }
4740
4741 sub format_sort_th {
4742         my ($name, $order, $header) = @_;
4743         my $sort_th = "";
4744         $header ||= ucfirst($name);
4745
4746         if ($order eq $name) {
4747                 $sort_th .= "<th>$header</th>\n";
4748         } else {
4749                 $sort_th .= "<th>" .
4750                             $cgi->a({-href => href(-replay=>1, order=>$name),
4751                                      -class => "header"}, $header) .
4752                             "</th>\n";
4753         }
4754
4755         return $sort_th;
4756 }
4757
4758 sub git_project_list_body {
4759         # actually uses global variable $project
4760         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4761
4762         my $check_forks = gitweb_check_feature('forks');
4763         my @projects = fill_project_list_info($projlist, $check_forks);
4764
4765         $order ||= $default_projects_order;
4766         $from = 0 unless defined $from;
4767         $to = $#projects if (!defined $to || $#projects < $to);
4768
4769         my %order_info = (
4770                 project => { key => 'path', type => 'str' },
4771                 descr => { key => 'descr_long', type => 'str' },
4772                 owner => { key => 'owner', type => 'str' },
4773                 age => { key => 'age', type => 'num' }
4774         );
4775         my $oi = $order_info{$order};
4776         if ($oi->{'type'} eq 'str') {
4777                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4778         } else {
4779                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4780         }
4781
4782         my $show_ctags = gitweb_check_feature('ctags');
4783         if ($show_ctags) {
4784                 my %ctags;
4785                 foreach my $p (@projects) {
4786                         foreach my $ct (keys %{$p->{'ctags'}}) {
4787                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4788                         }
4789                 }
4790                 my $cloud = git_populate_project_tagcloud(\%ctags);
4791                 print git_show_project_tagcloud($cloud, 64);
4792         }
4793
4794         print "<table class=\"project_list\">\n";
4795         unless ($no_header) {
4796                 print "<tr>\n";
4797                 if ($check_forks) {
4798                         print "<th></th>\n";
4799                 }
4800                 print_sort_th('project', $order, 'Project');
4801                 print_sort_th('descr', $order, 'Description');
4802                 print_sort_th('owner', $order, 'Owner');
4803                 print_sort_th('age', $order, 'Last Change');
4804                 print "<th></th>\n" . # for links
4805                       "</tr>\n";
4806         }
4807         my $alternate = 1;
4808         my $tagfilter = $cgi->param('by_tag');
4809         for (my $i = $from; $i <= $to; $i++) {
4810                 my $pr = $projects[$i];
4811
4812                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4813                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4814                         and not $pr->{'descr_long'} =~ /$searchtext/;
4815                 # Weed out forks or non-matching entries of search
4816                 if ($check_forks) {
4817                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4818                         $forkbase="^$forkbase" if $forkbase;
4819                         next if not $searchtext and not $tagfilter and $show_ctags
4820                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4821                 }
4822
4823                 if ($alternate) {
4824                         print "<tr class=\"dark\">\n";
4825                 } else {
4826                         print "<tr class=\"light\">\n";
4827                 }
4828                 $alternate ^= 1;
4829                 if ($check_forks) {
4830                         print "<td>";
4831                         if ($pr->{'forks'}) {
4832                                 print "<!-- $pr->{'forks'} -->\n";
4833                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4834                         }
4835                         print "</td>\n";
4836                 }
4837                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4838                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4839                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4840                                         -class => "list", -title => $pr->{'descr_long'}},
4841                                         esc_html($pr->{'descr'})) . "</td>\n" .
4842                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4843                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4844                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4845                       "<td class=\"link\">" .
4846                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4847                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4848                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4849                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4850                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4851                       "</td>\n" .
4852                       "</tr>\n";
4853         }
4854         if (defined $extra) {
4855                 print "<tr>\n";
4856                 if ($check_forks) {
4857                         print "<td></td>\n";
4858                 }
4859                 print "<td colspan=\"5\">$extra</td>\n" .
4860                       "</tr>\n";
4861         }
4862         print "</table>\n";
4863 }
4864
4865 sub git_log_body {
4866         # uses global variable $project
4867         my ($commitlist, $from, $to, $refs, $extra) = @_;
4868
4869         $from = 0 unless defined $from;
4870         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4871
4872         for (my $i = 0; $i <= $to; $i++) {
4873                 my %co = %{$commitlist->[$i]};
4874                 next if !%co;
4875                 my $commit = $co{'id'};
4876                 my $ref = format_ref_marker($refs, $commit);
4877                 my %ad = parse_date($co{'author_epoch'});
4878                 git_print_header_div('commit',
4879                                "<span class=\"age\">$co{'age_string'}</span>" .
4880                                esc_html($co{'title'}) . $ref,
4881                                $commit);
4882                 print "<div class=\"title_text\">\n" .
4883                       "<div class=\"log_link\">\n" .
4884                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4885                       " | " .
4886                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4887                       " | " .
4888                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4889                       "<br/>\n" .
4890                       "</div>\n";
4891                       git_print_authorship(\%co, -tag => 'span');
4892                       print "<br/>\n</div>\n";
4893
4894                 print "<div class=\"log_body\">\n";
4895                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4896                 print "</div>\n";
4897         }
4898         if ($extra) {
4899                 print "<div class=\"page_nav\">\n";
4900                 print "$extra\n";
4901                 print "</div>\n";
4902         }
4903 }
4904
4905 sub git_shortlog_body {
4906         # uses global variable $project
4907         my ($commitlist, $from, $to, $refs, $extra) = @_;
4908
4909         $from = 0 unless defined $from;
4910         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4911
4912         print "<table class=\"shortlog\">\n";
4913         my $alternate = 1;
4914         for (my $i = $from; $i <= $to; $i++) {
4915                 my %co = %{$commitlist->[$i]};
4916                 my $commit = $co{'id'};
4917                 my $ref = format_ref_marker($refs, $commit);
4918                 if ($alternate) {
4919                         print "<tr class=\"dark\">\n";
4920                 } else {
4921                         print "<tr class=\"light\">\n";
4922                 }
4923                 $alternate ^= 1;
4924                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4925                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4926                       format_author_html('td', \%co, 10) . "<td>";
4927                 print format_subject_html($co{'title'}, $co{'title_short'},
4928                                           href(action=>"commit", hash=>$commit), $ref);
4929                 print "</td>\n" .
4930                       "<td class=\"link\">" .
4931                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4932                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4933                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4934                 my $snapshot_links = format_snapshot_links($commit);
4935                 if (defined $snapshot_links) {
4936                         print " | " . $snapshot_links;
4937                 }
4938                 print "</td>\n" .
4939                       "</tr>\n";
4940         }
4941         if (defined $extra) {
4942                 print "<tr>\n" .
4943                       "<td colspan=\"4\">$extra</td>\n" .
4944                       "</tr>\n";
4945         }
4946         print "</table>\n";
4947 }
4948
4949 sub git_history_body {
4950         # Warning: assumes constant type (blob or tree) during history
4951         my ($commitlist, $from, $to, $refs, $extra,
4952             $file_name, $file_hash, $ftype) = @_;
4953
4954         $from = 0 unless defined $from;
4955         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4956
4957         print "<table class=\"history\">\n";
4958         my $alternate = 1;
4959         for (my $i = $from; $i <= $to; $i++) {
4960                 my %co = %{$commitlist->[$i]};
4961                 if (!%co) {
4962                         next;
4963                 }
4964                 my $commit = $co{'id'};
4965
4966                 my $ref = format_ref_marker($refs, $commit);
4967
4968                 if ($alternate) {
4969                         print "<tr class=\"dark\">\n";
4970                 } else {
4971                         print "<tr class=\"light\">\n";
4972                 }
4973                 $alternate ^= 1;
4974                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4975         # shortlog:   format_author_html('td', \%co, 10)
4976                       format_author_html('td', \%co, 15, 3) . "<td>";
4977                 # originally git_history used chop_str($co{'title'}, 50)
4978                 print format_subject_html($co{'title'}, $co{'title_short'},
4979                                           href(action=>"commit", hash=>$commit), $ref);
4980                 print "</td>\n" .
4981                       "<td class=\"link\">" .
4982                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4983                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4984
4985                 if ($ftype eq 'blob') {
4986                         my $blob_current = $file_hash;
4987                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4988                         if (defined $blob_current && defined $blob_parent &&
4989                                         $blob_current ne $blob_parent) {
4990                                 print " | " .
4991                                         $cgi->a({-href => href(action=>"blobdiff",
4992                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4993                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4994                                                                file_name=>$file_name)},
4995                                                 "diff to current");
4996                         }
4997                 }
4998                 print "</td>\n" .
4999                       "</tr>\n";
5000         }
5001         if (defined $extra) {
5002                 print "<tr>\n" .
5003                       "<td colspan=\"4\">$extra</td>\n" .
5004                       "</tr>\n";
5005         }
5006         print "</table>\n";
5007 }
5008
5009 sub git_tags_body {
5010         # uses global variable $project
5011         my ($taglist, $from, $to, $extra) = @_;
5012         $from = 0 unless defined $from;
5013         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5014
5015         print "<table class=\"tags\">\n";
5016         my $alternate = 1;
5017         for (my $i = $from; $i <= $to; $i++) {
5018                 my $entry = $taglist->[$i];
5019                 my %tag = %$entry;
5020                 my $comment = $tag{'subject'};
5021                 my $comment_short;
5022                 if (defined $comment) {
5023                         $comment_short = chop_str($comment, 30, 5);
5024                 }
5025                 if ($alternate) {
5026                         print "<tr class=\"dark\">\n";
5027                 } else {
5028                         print "<tr class=\"light\">\n";
5029                 }
5030                 $alternate ^= 1;
5031                 if (defined $tag{'age'}) {
5032                         print "<td><i>$tag{'age'}</i></td>\n";
5033                 } else {
5034                         print "<td></td>\n";
5035                 }
5036                 print "<td>" .
5037                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5038                                -class => "list name"}, esc_html($tag{'name'})) .
5039                       "</td>\n" .
5040                       "<td>";
5041                 if (defined $comment) {
5042                         print format_subject_html($comment, $comment_short,
5043                                                   href(action=>"tag", hash=>$tag{'id'}));
5044                 }
5045                 print "</td>\n" .
5046                       "<td class=\"selflink\">";
5047                 if ($tag{'type'} eq "tag") {
5048                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5049                 } else {
5050                         print "&nbsp;";
5051                 }
5052                 print "</td>\n" .
5053                       "<td class=\"link\">" . " | " .
5054                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5055                 if ($tag{'reftype'} eq "commit") {
5056                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5057                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5058                 } elsif ($tag{'reftype'} eq "blob") {
5059                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5060                 }
5061                 print "</td>\n" .
5062                       "</tr>";
5063         }
5064         if (defined $extra) {
5065                 print "<tr>\n" .
5066                       "<td colspan=\"5\">$extra</td>\n" .
5067                       "</tr>\n";
5068         }
5069         print "</table>\n";
5070 }
5071
5072 sub git_heads_body {
5073         # uses global variable $project
5074         my ($headlist, $head, $from, $to, $extra) = @_;
5075         $from = 0 unless defined $from;
5076         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5077
5078         print "<table class=\"heads\">\n";
5079         my $alternate = 1;
5080         for (my $i = $from; $i <= $to; $i++) {
5081                 my $entry = $headlist->[$i];
5082                 my %ref = %$entry;
5083                 my $curr = $ref{'id'} eq $head;
5084                 if ($alternate) {
5085                         print "<tr class=\"dark\">\n";
5086                 } else {
5087                         print "<tr class=\"light\">\n";
5088                 }
5089                 $alternate ^= 1;
5090                 print "<td><i>$ref{'age'}</i></td>\n" .
5091                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5092                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5093                                -class => "list name"},esc_html($ref{'name'})) .
5094                       "</td>\n" .
5095                       "<td class=\"link\">" .
5096                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5097                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5098                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5099                       "</td>\n" .
5100                       "</tr>";
5101         }
5102         if (defined $extra) {
5103                 print "<tr>\n" .
5104                       "<td colspan=\"3\">$extra</td>\n" .
5105                       "</tr>\n";
5106         }
5107         print "</table>\n";
5108 }
5109
5110 # Display a single remote block
5111 sub git_remote_block {
5112         my ($remote, $rdata, $limit, $head) = @_;
5113
5114         my $heads = $rdata->{'heads'};
5115         my $fetch = $rdata->{'fetch'};
5116         my $push = $rdata->{'push'};
5117
5118         my $urls_table = "<table class=\"projects_list\">\n" ;
5119
5120         if (defined $fetch) {
5121                 if ($fetch eq $push) {
5122                         $urls_table .= format_repo_url("URL", $fetch);
5123                 } else {
5124                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5125                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5126                 }
5127         } elsif (defined $push) {
5128                 $urls_table .= format_repo_url("Push URL", $push);
5129         } else {
5130                 $urls_table .= format_repo_url("", "No remote URL");
5131         }
5132
5133         $urls_table .= "</table>\n";
5134
5135         my $dots;
5136         if (defined $limit && $limit < @$heads) {
5137                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5138         }
5139
5140         print $urls_table;
5141         git_heads_body($heads, $head, 0, $limit, $dots);
5142 }
5143
5144 # Display a list of remote names with the respective fetch and push URLs
5145 sub git_remotes_list {
5146         my ($remotedata, $limit) = @_;
5147         print "<table class=\"heads\">\n";
5148         my $alternate = 1;
5149         my @remotes = sort keys %$remotedata;
5150
5151         my $limited = $limit && $limit < @remotes;
5152
5153         $#remotes = $limit - 1 if $limited;
5154
5155         while (my $remote = shift @remotes) {
5156                 my $rdata = $remotedata->{$remote};
5157                 my $fetch = $rdata->{'fetch'};
5158                 my $push = $rdata->{'push'};
5159                 if ($alternate) {
5160                         print "<tr class=\"dark\">\n";
5161                 } else {
5162                         print "<tr class=\"light\">\n";
5163                 }
5164                 $alternate ^= 1;
5165                 print "<td>" .
5166                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5167                                -class=> "list name"},esc_html($remote)) .
5168                       "</td>";
5169                 print "<td class=\"link\">" .
5170                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5171                       " | " .
5172                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5173                       "</td>";
5174
5175                 print "</tr>\n";
5176         }
5177
5178         if ($limited) {
5179                 print "<tr>\n" .
5180                       "<td colspan=\"3\">" .
5181                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5182                       "</td>\n" . "</tr>\n";
5183         }
5184
5185         print "</table>";
5186 }
5187
5188 # Display remote heads grouped by remote, unless there are too many
5189 # remotes, in which case we only display the remote names
5190 sub git_remotes_body {
5191         my ($remotedata, $limit, $head) = @_;
5192         if ($limit and $limit < keys %$remotedata) {
5193                 git_remotes_list($remotedata, $limit);
5194         } else {
5195                 fill_remote_heads($remotedata);
5196                 while (my ($remote, $rdata) = each %$remotedata) {
5197                         git_print_section({-class=>"remote", -id=>$remote},
5198                                 ["remotes", $remote, $remote], sub {
5199                                         git_remote_block($remote, $rdata, $limit, $head);
5200                                 });
5201                 }
5202         }
5203 }
5204
5205 sub git_search_grep_body {
5206         my ($commitlist, $from, $to, $extra) = @_;
5207         $from = 0 unless defined $from;
5208         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5209
5210         print "<table class=\"commit_search\">\n";
5211         my $alternate = 1;
5212         for (my $i = $from; $i <= $to; $i++) {
5213                 my %co = %{$commitlist->[$i]};
5214                 if (!%co) {
5215                         next;
5216                 }
5217                 my $commit = $co{'id'};
5218                 if ($alternate) {
5219                         print "<tr class=\"dark\">\n";
5220                 } else {
5221                         print "<tr class=\"light\">\n";
5222                 }
5223                 $alternate ^= 1;
5224                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5225                       format_author_html('td', \%co, 15, 5) .
5226                       "<td>" .
5227                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5228                                -class => "list subject"},
5229                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5230                 my $comment = $co{'comment'};
5231                 foreach my $line (@$comment) {
5232                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5233                                 my ($lead, $match, $trail) = ($1, $2, $3);
5234                                 $match = chop_str($match, 70, 5, 'center');
5235                                 my $contextlen = int((80 - length($match))/2);
5236                                 $contextlen = 30 if ($contextlen > 30);
5237                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5238                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5239
5240                                 $lead  = esc_html($lead);
5241                                 $match = esc_html($match);
5242                                 $trail = esc_html($trail);
5243
5244                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5245                         }
5246                 }
5247                 print "</td>\n" .
5248                       "<td class=\"link\">" .
5249                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5250                       " | " .
5251                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5252                       " | " .
5253                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5254                 print "</td>\n" .
5255                       "</tr>\n";
5256         }
5257         if (defined $extra) {
5258                 print "<tr>\n" .
5259                       "<td colspan=\"3\">$extra</td>\n" .
5260                       "</tr>\n";
5261         }
5262         print "</table>\n";
5263 }
5264
5265 ## ======================================================================
5266 ## ======================================================================
5267 ## actions
5268
5269 sub git_project_list {
5270         my $order = $input_params{'order'};
5271         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5272                 die_error(400, "Unknown order parameter");
5273         }
5274
5275         my @list = git_get_projects_list();
5276         if (!@list) {
5277                 die_error(404, "No projects found");
5278         }
5279
5280         git_header_html();
5281         if (defined $home_text && -f $home_text) {
5282                 print "<div class=\"index_include\">\n";
5283                 insert_file($home_text);
5284                 print "</div>\n";
5285         }
5286         print $cgi->startform(-method => "get") .
5287               "<p class=\"projsearch\">Search:\n" .
5288               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5289               "</p>" .
5290               $cgi->end_form() . "\n";
5291         git_project_list_body(\@list, $order);
5292         git_footer_html();
5293 }
5294
5295 sub git_forks {
5296         my $order = $input_params{'order'};
5297         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5298                 die_error(400, "Unknown order parameter");
5299         }
5300
5301         my @list = git_get_projects_list($project);
5302         if (!@list) {
5303                 die_error(404, "No forks found");
5304         }
5305
5306         git_header_html();
5307         git_print_page_nav('','');
5308         git_print_header_div('summary', "$project forks");
5309         git_project_list_body(\@list, $order);
5310         git_footer_html();
5311 }
5312
5313 sub git_project_index {
5314         my @projects = git_get_projects_list($project);
5315
5316         print $cgi->header(
5317                 -type => 'text/plain',
5318                 -charset => 'utf-8',
5319                 -content_disposition => 'inline; filename="index.aux"');
5320
5321         foreach my $pr (@projects) {
5322                 if (!exists $pr->{'owner'}) {
5323                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5324                 }
5325
5326                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5327                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5328                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5329                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5330                 $path  =~ s/ /\+/g;
5331                 $owner =~ s/ /\+/g;
5332
5333                 print "$path $owner\n";
5334         }
5335 }
5336
5337 sub git_summary {
5338         my $descr = git_get_project_description($project) || "none";
5339         my %co = parse_commit("HEAD");
5340         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5341         my $head = $co{'id'};
5342         my $remote_heads = gitweb_check_feature('remote_heads');
5343
5344         my $owner = git_get_project_owner($project);
5345
5346         my $refs = git_get_references();
5347         # These get_*_list functions return one more to allow us to see if
5348         # there are more ...
5349         my @taglist  = git_get_tags_list(16);
5350         my @headlist = git_get_heads_list(16);
5351         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5352         my @forklist;
5353         my $check_forks = gitweb_check_feature('forks');
5354
5355         if ($check_forks) {
5356                 @forklist = git_get_projects_list($project);
5357         }
5358
5359         git_header_html();
5360         git_print_page_nav('summary','', $head);
5361
5362         print "<div class=\"title\">&nbsp;</div>\n";
5363         print "<table class=\"projects_list\">\n" .
5364               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5365               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5366         if (defined $cd{'rfc2822'}) {
5367                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5368         }
5369
5370         # use per project git URL list in $projectroot/$project/cloneurl
5371         # or make project git URL from git base URL and project name
5372         my $url_tag = "URL";
5373         my @url_list = git_get_project_url_list($project);
5374         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5375         foreach my $git_url (@url_list) {
5376                 next unless $git_url;
5377                 print format_repo_url($url_tag, $git_url);
5378                 $url_tag = "";
5379         }
5380
5381         # Tag cloud
5382         my $show_ctags = gitweb_check_feature('ctags');
5383         if ($show_ctags) {
5384                 my $ctags = git_get_project_ctags($project);
5385                 my $cloud = git_populate_project_tagcloud($ctags);
5386                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5387                 print "</td>\n<td>" unless %$ctags;
5388                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5389                 print "</td>\n<td>" if %$ctags;
5390                 print git_show_project_tagcloud($cloud, 48);
5391                 print "</td></tr>";
5392         }
5393
5394         print "</table>\n";
5395
5396         # If XSS prevention is on, we don't include README.html.
5397         # TODO: Allow a readme in some safe format.
5398         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5399                 print "<div class=\"title\">readme</div>\n" .
5400                       "<div class=\"readme\">\n";
5401                 insert_file("$projectroot/$project/README.html");
5402                 print "\n</div>\n"; # class="readme"
5403         }
5404
5405         # we need to request one more than 16 (0..15) to check if
5406         # those 16 are all
5407         my @commitlist = $head ? parse_commits($head, 17) : ();
5408         if (@commitlist) {
5409                 git_print_header_div('shortlog');
5410                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5411                                   $#commitlist <=  15 ? undef :
5412                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5413         }
5414
5415         if (@taglist) {
5416                 git_print_header_div('tags');
5417                 git_tags_body(\@taglist, 0, 15,
5418                               $#taglist <=  15 ? undef :
5419                               $cgi->a({-href => href(action=>"tags")}, "..."));
5420         }
5421
5422         if (@headlist) {
5423                 git_print_header_div('heads');
5424                 git_heads_body(\@headlist, $head, 0, 15,
5425                                $#headlist <= 15 ? undef :
5426                                $cgi->a({-href => href(action=>"heads")}, "..."));
5427         }
5428
5429         if (%remotedata) {
5430                 git_print_header_div('remotes');
5431                 git_remotes_body(\%remotedata, 15, $head);
5432         }
5433
5434         if (@forklist) {
5435                 git_print_header_div('forks');
5436                 git_project_list_body(\@forklist, 'age', 0, 15,
5437                                       $#forklist <= 15 ? undef :
5438                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5439                                       'no_header');
5440         }
5441
5442         git_footer_html();
5443 }
5444
5445 sub git_tag {
5446         my %tag = parse_tag($hash);
5447
5448         if (! %tag) {
5449                 die_error(404, "Unknown tag object");
5450         }
5451
5452         my $head = git_get_head_hash($project);
5453         git_header_html();
5454         git_print_page_nav('','', $head,undef,$head);
5455         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5456         print "<div class=\"title_text\">\n" .
5457               "<table class=\"object_header\">\n" .
5458               "<tr>\n" .
5459               "<td>object</td>\n" .
5460               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5461                                $tag{'object'}) . "</td>\n" .
5462               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5463                                               $tag{'type'}) . "</td>\n" .
5464               "</tr>\n";
5465         if (defined($tag{'author'})) {
5466                 git_print_authorship_rows(\%tag, 'author');
5467         }
5468         print "</table>\n\n" .
5469               "</div>\n";
5470         print "<div class=\"page_body\">";
5471         my $comment = $tag{'comment'};
5472         foreach my $line (@$comment) {
5473                 chomp $line;
5474                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5475         }
5476         print "</div>\n";
5477         git_footer_html();
5478 }
5479
5480 sub git_blame_common {
5481         my $format = shift || 'porcelain';
5482         if ($format eq 'porcelain' && $cgi->param('js')) {
5483                 $format = 'incremental';
5484                 $action = 'blame_incremental'; # for page title etc
5485         }
5486
5487         # permissions
5488         gitweb_check_feature('blame')
5489                 or die_error(403, "Blame view not allowed");
5490
5491         # error checking
5492         die_error(400, "No file name given") unless $file_name;
5493         $hash_base ||= git_get_head_hash($project);
5494         die_error(404, "Couldn't find base commit") unless $hash_base;
5495         my %co = parse_commit($hash_base)
5496                 or die_error(404, "Commit not found");
5497         my $ftype = "blob";
5498         if (!defined $hash) {
5499                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5500                         or die_error(404, "Error looking up file");
5501         } else {
5502                 $ftype = git_get_type($hash);
5503                 if ($ftype !~ "blob") {
5504                         die_error(400, "Object is not a blob");
5505                 }
5506         }
5507
5508         my $fd;
5509         if ($format eq 'incremental') {
5510                 # get file contents (as base)
5511                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5512                         or die_error(500, "Open git-cat-file failed");
5513         } elsif ($format eq 'data') {
5514                 # run git-blame --incremental
5515                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5516                         $hash_base, "--", $file_name
5517                         or die_error(500, "Open git-blame --incremental failed");
5518         } else {
5519                 # run git-blame --porcelain
5520                 open $fd, "-|", git_cmd(), "blame", '-p',
5521                         $hash_base, '--', $file_name
5522                         or die_error(500, "Open git-blame --porcelain failed");
5523         }
5524
5525         # incremental blame data returns early
5526         if ($format eq 'data') {
5527                 print $cgi->header(
5528                         -type=>"text/plain", -charset => "utf-8",
5529                         -status=> "200 OK");
5530                 local $| = 1; # output autoflush
5531                 print while <$fd>;
5532                 close $fd
5533                         or print "ERROR $!\n";
5534
5535                 print 'END';
5536                 if (defined $t0 && gitweb_check_feature('timed')) {
5537                         print ' '.
5538                               tv_interval($t0, [ gettimeofday() ]).
5539                               ' '.$number_of_git_cmds;
5540                 }
5541                 print "\n";
5542
5543                 return;
5544         }
5545
5546         # page header
5547         git_header_html();
5548         my $formats_nav =
5549                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5550                         "blob") .
5551                 " | ";
5552         if ($format eq 'incremental') {
5553                 $formats_nav .=
5554                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5555                                 "blame") . " (non-incremental)";
5556         } else {
5557                 $formats_nav .=
5558                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5559                                 "blame") . " (incremental)";
5560         }
5561         $formats_nav .=
5562                 " | " .
5563                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5564                         "history") .
5565                 " | " .
5566                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5567                         "HEAD");
5568         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5569         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5570         git_print_page_path($file_name, $ftype, $hash_base);
5571
5572         # page body
5573         if ($format eq 'incremental') {
5574                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5575                       "This page requires JavaScript to run.\n Use ".
5576                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5577                               'this page').
5578                       " instead.\n".
5579                       "</b></center></div>\n</noscript>\n";
5580
5581                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5582         }
5583
5584         print qq!<div class="page_body">\n!;
5585         print qq!<div id="progress_info">... / ...</div>\n!
5586                 if ($format eq 'incremental');
5587         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5588               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5589               qq!<thead>\n!.
5590               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5591               qq!</thead>\n!.
5592               qq!<tbody>\n!;
5593
5594         my @rev_color = qw(light dark);
5595         my $num_colors = scalar(@rev_color);
5596         my $current_color = 0;
5597
5598         if ($format eq 'incremental') {
5599                 my $color_class = $rev_color[$current_color];
5600
5601                 #contents of a file
5602                 my $linenr = 0;
5603         LINE:
5604                 while (my $line = <$fd>) {
5605                         chomp $line;
5606                         $linenr++;
5607
5608                         print qq!<tr id="l$linenr" class="$color_class">!.
5609                               qq!<td class="sha1"><a href=""> </a></td>!.
5610                               qq!<td class="linenr">!.
5611                               qq!<a class="linenr" href="">$linenr</a></td>!;
5612                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5613                         print qq!</tr>\n!;
5614                 }
5615
5616         } else { # porcelain, i.e. ordinary blame
5617                 my %metainfo = (); # saves information about commits
5618
5619                 # blame data
5620         LINE:
5621                 while (my $line = <$fd>) {
5622                         chomp $line;
5623                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5624                         # no <lines in group> for subsequent lines in group of lines
5625                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5626                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5627                         if (!exists $metainfo{$full_rev}) {
5628                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5629                         }
5630                         my $meta = $metainfo{$full_rev};
5631                         my $data;
5632                         while ($data = <$fd>) {
5633                                 chomp $data;
5634                                 last if ($data =~ s/^\t//); # contents of line
5635                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5636                                         $meta->{$1} = $2 unless exists $meta->{$1};
5637                                 }
5638                                 if ($data =~ /^previous /) {
5639                                         $meta->{'nprevious'}++;
5640                                 }
5641                         }
5642                         my $short_rev = substr($full_rev, 0, 8);
5643                         my $author = $meta->{'author'};
5644                         my %date =
5645                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5646                         my $date = $date{'iso-tz'};
5647                         if ($group_size) {
5648                                 $current_color = ($current_color + 1) % $num_colors;
5649                         }
5650                         my $tr_class = $rev_color[$current_color];
5651                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5652                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5653                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5654                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5655                         if ($group_size) {
5656                                 print "<td class=\"sha1\"";
5657                                 print " title=\"". esc_html($author) . ", $date\"";
5658                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5659                                 print ">";
5660                                 print $cgi->a({-href => href(action=>"commit",
5661                                                              hash=>$full_rev,
5662                                                              file_name=>$file_name)},
5663                                               esc_html($short_rev));
5664                                 if ($group_size >= 2) {
5665                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5666                                         if (@author_initials) {
5667                                                 print "<br />" .
5668                                                       esc_html(join('', @author_initials));
5669                                                 #           or join('.', ...)
5670                                         }
5671                                 }
5672                                 print "</td>\n";
5673                         }
5674                         # 'previous' <sha1 of parent commit> <filename at commit>
5675                         if (exists $meta->{'previous'} &&
5676                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5677                                 $meta->{'parent'} = $1;
5678                                 $meta->{'file_parent'} = unquote($2);
5679                         }
5680                         my $linenr_commit =
5681                                 exists($meta->{'parent'}) ?
5682                                 $meta->{'parent'} : $full_rev;
5683                         my $linenr_filename =
5684                                 exists($meta->{'file_parent'}) ?
5685                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5686                         my $blamed = href(action => 'blame',
5687                                           file_name => $linenr_filename,
5688                                           hash_base => $linenr_commit);
5689                         print "<td class=\"linenr\">";
5690                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5691                                         -class => "linenr" },
5692                                       esc_html($lineno));
5693                         print "</td>";
5694                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5695                         print "</tr>\n";
5696                 } # end while
5697
5698         }
5699
5700         # footer
5701         print "</tbody>\n".
5702               "</table>\n"; # class="blame"
5703         print "</div>\n";   # class="blame_body"
5704         close $fd
5705                 or print "Reading blob failed\n";
5706
5707         git_footer_html();
5708 }
5709
5710 sub git_blame {
5711         git_blame_common();
5712 }
5713
5714 sub git_blame_incremental {
5715         git_blame_common('incremental');
5716 }
5717
5718 sub git_blame_data {
5719         git_blame_common('data');
5720 }
5721
5722 sub git_tags {
5723         my $head = git_get_head_hash($project);
5724         git_header_html();
5725         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5726         git_print_header_div('summary', $project);
5727
5728         my @tagslist = git_get_tags_list();
5729         if (@tagslist) {
5730                 git_tags_body(\@tagslist);
5731         }
5732         git_footer_html();
5733 }
5734
5735 sub git_heads {
5736         my $head = git_get_head_hash($project);
5737         git_header_html();
5738         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5739         git_print_header_div('summary', $project);
5740
5741         my @headslist = git_get_heads_list();
5742         if (@headslist) {
5743                 git_heads_body(\@headslist, $head);
5744         }
5745         git_footer_html();
5746 }
5747
5748 # used both for single remote view and for list of all the remotes
5749 sub git_remotes {
5750         gitweb_check_feature('remote_heads')
5751                 or die_error(403, "Remote heads view is disabled");
5752
5753         my $head = git_get_head_hash($project);
5754         my $remote = $input_params{'hash'};
5755
5756         my $remotedata = git_get_remotes_list($remote);
5757         die_error(500, "Unable to get remote information") unless defined $remotedata;
5758
5759         unless (%$remotedata) {
5760                 die_error(404, defined $remote ?
5761                         "Remote $remote not found" :
5762                         "No remotes found");
5763         }
5764
5765         git_header_html(undef, undef, -action_extra => $remote);
5766         git_print_page_nav('', '',  $head, undef, $head,
5767                 format_ref_views($remote ? '' : 'remotes'));
5768
5769         fill_remote_heads($remotedata);
5770         if (defined $remote) {
5771                 git_print_header_div('remotes', "$remote remote for $project");
5772                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5773         } else {
5774                 git_print_header_div('summary', "$project remotes");
5775                 git_remotes_body($remotedata, undef, $head);
5776         }
5777
5778         git_footer_html();
5779 }
5780
5781 sub git_blob_plain {
5782         my $type = shift;
5783         my $expires;
5784
5785         if (!defined $hash) {
5786                 if (defined $file_name) {
5787                         my $base = $hash_base || git_get_head_hash($project);
5788                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5789                                 or die_error(404, "Cannot find file");
5790                 } else {
5791                         die_error(400, "No file name defined");
5792                 }
5793         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5794                 # blobs defined by non-textual hash id's can be cached
5795                 $expires = "+1d";
5796         }
5797
5798         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5799                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5800
5801         # content-type (can include charset)
5802         $type = blob_contenttype($fd, $file_name, $type);
5803
5804         # "save as" filename, even when no $file_name is given
5805         my $save_as = "$hash";
5806         if (defined $file_name) {
5807                 $save_as = $file_name;
5808         } elsif ($type =~ m/^text\//) {
5809                 $save_as .= '.txt';
5810         }
5811
5812         # With XSS prevention on, blobs of all types except a few known safe
5813         # ones are served with "Content-Disposition: attachment" to make sure
5814         # they don't run in our security domain.  For certain image types,
5815         # blob view writes an <img> tag referring to blob_plain view, and we
5816         # want to be sure not to break that by serving the image as an
5817         # attachment (though Firefox 3 doesn't seem to care).
5818         my $sandbox = $prevent_xss &&
5819                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5820
5821         print $cgi->header(
5822                 -type => $type,
5823                 -expires => $expires,
5824                 -content_disposition =>
5825                         ($sandbox ? 'attachment' : 'inline')
5826                         . '; filename="' . $save_as . '"');
5827         local $/ = undef;
5828         binmode STDOUT, ':raw';
5829         print <$fd>;
5830         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5831         close $fd;
5832 }
5833
5834 sub git_blob {
5835         my $expires;
5836
5837         if (!defined $hash) {
5838                 if (defined $file_name) {
5839                         my $base = $hash_base || git_get_head_hash($project);
5840                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5841                                 or die_error(404, "Cannot find file");
5842                 } else {
5843                         die_error(400, "No file name defined");
5844                 }
5845         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5846                 # blobs defined by non-textual hash id's can be cached
5847                 $expires = "+1d";
5848         }
5849
5850         my $have_blame = gitweb_check_feature('blame');
5851         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5852                 or die_error(500, "Couldn't cat $file_name, $hash");
5853         my $mimetype = blob_mimetype($fd, $file_name);
5854         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5855         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5856                 close $fd;
5857                 return git_blob_plain($mimetype);
5858         }
5859         # we can have blame only for text/* mimetype
5860         $have_blame &&= ($mimetype =~ m!^text/!);
5861
5862         my $highlight = gitweb_check_feature('highlight');
5863         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5864         $fd = run_highlighter($fd, $highlight, $syntax)
5865                 if $syntax;
5866
5867         git_header_html(undef, $expires);
5868         my $formats_nav = '';
5869         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5870                 if (defined $file_name) {
5871                         if ($have_blame) {
5872                                 $formats_nav .=
5873                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5874                                                 "blame") .
5875                                         " | ";
5876                         }
5877                         $formats_nav .=
5878                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5879                                         "history") .
5880                                 " | " .
5881                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5882                                         "raw") .
5883                                 " | " .
5884                                 $cgi->a({-href => href(action=>"blob",
5885                                                        hash_base=>"HEAD", file_name=>$file_name)},
5886                                         "HEAD");
5887                 } else {
5888                         $formats_nav .=
5889                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5890                                         "raw");
5891                 }
5892                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5893                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5894         } else {
5895                 print "<div class=\"page_nav\">\n" .
5896                       "<br/><br/></div>\n" .
5897                       "<div class=\"title\">$hash</div>\n";
5898         }
5899         git_print_page_path($file_name, "blob", $hash_base);
5900         print "<div class=\"page_body\">\n";
5901         if ($mimetype =~ m!^image/!) {
5902                 print qq!<img type="$mimetype"!;
5903                 if ($file_name) {
5904                         print qq! alt="$file_name" title="$file_name"!;
5905                 }
5906                 print qq! src="! .
5907                       href(action=>"blob_plain", hash=>$hash,
5908                            hash_base=>$hash_base, file_name=>$file_name) .
5909                       qq!" />\n!;
5910         } else {
5911                 my $nr;
5912                 while (my $line = <$fd>) {
5913                         chomp $line;
5914                         $nr++;
5915                         $line = untabify($line);
5916                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5917                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5918                 }
5919         }
5920         close $fd
5921                 or print "Reading blob failed.\n";
5922         print "</div>";
5923         git_footer_html();
5924 }
5925
5926 sub git_tree {
5927         if (!defined $hash_base) {
5928                 $hash_base = "HEAD";
5929         }
5930         if (!defined $hash) {
5931                 if (defined $file_name) {
5932                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5933                 } else {
5934                         $hash = $hash_base;
5935                 }
5936         }
5937         die_error(404, "No such tree") unless defined($hash);
5938
5939         my $show_sizes = gitweb_check_feature('show-sizes');
5940         my $have_blame = gitweb_check_feature('blame');
5941
5942         my @entries = ();
5943         {
5944                 local $/ = "\0";
5945                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5946                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5947                         or die_error(500, "Open git-ls-tree failed");
5948                 @entries = map { chomp; $_ } <$fd>;
5949                 close $fd
5950                         or die_error(404, "Reading tree failed");
5951         }
5952
5953         my $refs = git_get_references();
5954         my $ref = format_ref_marker($refs, $hash_base);
5955         git_header_html();
5956         my $basedir = '';
5957         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5958                 my @views_nav = ();
5959                 if (defined $file_name) {
5960                         push @views_nav,
5961                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5962                                         "history"),
5963                                 $cgi->a({-href => href(action=>"tree",
5964                                                        hash_base=>"HEAD", file_name=>$file_name)},
5965                                         "HEAD"),
5966                 }
5967                 my $snapshot_links = format_snapshot_links($hash);
5968                 if (defined $snapshot_links) {
5969                         # FIXME: Should be available when we have no hash base as well.
5970                         push @views_nav, $snapshot_links;
5971                 }
5972                 git_print_page_nav('tree','', $hash_base, undef, undef,
5973                                    join(' | ', @views_nav));
5974                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5975         } else {
5976                 undef $hash_base;
5977                 print "<div class=\"page_nav\">\n";
5978                 print "<br/><br/></div>\n";
5979                 print "<div class=\"title\">$hash</div>\n";
5980         }
5981         if (defined $file_name) {
5982                 $basedir = $file_name;
5983                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5984                         $basedir .= '/';
5985                 }
5986                 git_print_page_path($file_name, 'tree', $hash_base);
5987         }
5988         print "<div class=\"page_body\">\n";
5989         print "<table class=\"tree\">\n";
5990         my $alternate = 1;
5991         # '..' (top directory) link if possible
5992         if (defined $hash_base &&
5993             defined $file_name && $file_name =~ m![^/]+$!) {
5994                 if ($alternate) {
5995                         print "<tr class=\"dark\">\n";
5996                 } else {
5997                         print "<tr class=\"light\">\n";
5998                 }
5999                 $alternate ^= 1;
6000
6001                 my $up = $file_name;
6002                 $up =~ s!/?[^/]+$!!;
6003                 undef $up unless $up;
6004                 # based on git_print_tree_entry
6005                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6006                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6007                 print '<td class="list">';
6008                 print $cgi->a({-href => href(action=>"tree",
6009                                              hash_base=>$hash_base,
6010                                              file_name=>$up)},
6011                               "..");
6012                 print "</td>\n";
6013                 print "<td class=\"link\"></td>\n";
6014
6015                 print "</tr>\n";
6016         }
6017         foreach my $line (@entries) {
6018                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6019
6020                 if ($alternate) {
6021                         print "<tr class=\"dark\">\n";
6022                 } else {
6023                         print "<tr class=\"light\">\n";
6024                 }
6025                 $alternate ^= 1;
6026
6027                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6028
6029                 print "</tr>\n";
6030         }
6031         print "</table>\n" .
6032               "</div>";
6033         git_footer_html();
6034 }
6035
6036 sub snapshot_name {
6037         my ($project, $hash) = @_;
6038
6039         # path/to/project.git  -> project
6040         # path/to/project/.git -> project
6041         my $name = to_utf8($project);
6042         $name =~ s,([^/])/*\.git$,$1,;
6043         $name = basename($name);
6044         # sanitize name
6045         $name =~ s/[[:cntrl:]]/?/g;
6046
6047         my $ver = $hash;
6048         if ($hash =~ /^[0-9a-fA-F]+$/) {
6049                 # shorten SHA-1 hash
6050                 my $full_hash = git_get_full_hash($project, $hash);
6051                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6052                         $ver = git_get_short_hash($project, $hash);
6053                 }
6054         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6055                 # tags don't need shortened SHA-1 hash
6056                 $ver = $1;
6057         } else {
6058                 # branches and other need shortened SHA-1 hash
6059                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6060                         $ver = $1;
6061                 }
6062                 $ver .= '-' . git_get_short_hash($project, $hash);
6063         }
6064         # in case of hierarchical branch names
6065         $ver =~ s!/!.!g;
6066
6067         # name = project-version_string
6068         $name = "$name-$ver";
6069
6070         return wantarray ? ($name, $name) : $name;
6071 }
6072
6073 sub git_snapshot {
6074         my $format = $input_params{'snapshot_format'};
6075         if (!@snapshot_fmts) {
6076                 die_error(403, "Snapshots not allowed");
6077         }
6078         # default to first supported snapshot format
6079         $format ||= $snapshot_fmts[0];
6080         if ($format !~ m/^[a-z0-9]+$/) {
6081                 die_error(400, "Invalid snapshot format parameter");
6082         } elsif (!exists($known_snapshot_formats{$format})) {
6083                 die_error(400, "Unknown snapshot format");
6084         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6085                 die_error(403, "Snapshot format not allowed");
6086         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6087                 die_error(403, "Unsupported snapshot format");
6088         }
6089
6090         my $type = git_get_type("$hash^{}");
6091         if (!$type) {
6092                 die_error(404, 'Object does not exist');
6093         }  elsif ($type eq 'blob') {
6094                 die_error(400, 'Object is not a tree-ish');
6095         }
6096
6097         my ($name, $prefix) = snapshot_name($project, $hash);
6098         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6099         my $cmd = quote_command(
6100                 git_cmd(), 'archive',
6101                 "--format=$known_snapshot_formats{$format}{'format'}",
6102                 "--prefix=$prefix/", $hash);
6103         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6104                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6105         }
6106
6107         $filename =~ s/(["\\])/\\$1/g;
6108         print $cgi->header(
6109                 -type => $known_snapshot_formats{$format}{'type'},
6110                 -content_disposition => 'inline; filename="' . $filename . '"',
6111                 -status => '200 OK');
6112
6113         open my $fd, "-|", $cmd
6114                 or die_error(500, "Execute git-archive failed");
6115         binmode STDOUT, ':raw';
6116         print <$fd>;
6117         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6118         close $fd;
6119 }
6120
6121 sub git_log_generic {
6122         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6123
6124         my $head = git_get_head_hash($project);
6125         if (!defined $base) {
6126                 $base = $head;
6127         }
6128         if (!defined $page) {
6129                 $page = 0;
6130         }
6131         my $refs = git_get_references();
6132
6133         my $commit_hash = $base;
6134         if (defined $parent) {
6135                 $commit_hash = "$parent..$base";
6136         }
6137         my @commitlist =
6138                 parse_commits($commit_hash, 101, (100 * $page),
6139                               defined $file_name ? ($file_name, "--full-history") : ());
6140
6141         my $ftype;
6142         if (!defined $file_hash && defined $file_name) {
6143                 # some commits could have deleted file in question,
6144                 # and not have it in tree, but one of them has to have it
6145                 for (my $i = 0; $i < @commitlist; $i++) {
6146                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6147                         last if defined $file_hash;
6148                 }
6149         }
6150         if (defined $file_hash) {
6151                 $ftype = git_get_type($file_hash);
6152         }
6153         if (defined $file_name && !defined $ftype) {
6154                 die_error(500, "Unknown type of object");
6155         }
6156         my %co;
6157         if (defined $file_name) {
6158                 %co = parse_commit($base)
6159                         or die_error(404, "Unknown commit object");
6160         }
6161
6162
6163         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6164         my $next_link = '';
6165         if ($#commitlist >= 100) {
6166                 $next_link =
6167                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6168                                  -accesskey => "n", -title => "Alt-n"}, "next");
6169         }
6170         my $patch_max = gitweb_get_feature('patches');
6171         if ($patch_max && !defined $file_name) {
6172                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6173                         $paging_nav .= " &sdot; " .
6174                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6175                                         "patches");
6176                 }
6177         }
6178
6179         git_header_html();
6180         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6181         if (defined $file_name) {
6182                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6183         } else {
6184                 git_print_header_div('summary', $project)
6185         }
6186         git_print_page_path($file_name, $ftype, $hash_base)
6187                 if (defined $file_name);
6188
6189         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6190                      $file_name, $file_hash, $ftype);
6191
6192         git_footer_html();
6193 }
6194
6195 sub git_log {
6196         git_log_generic('log', \&git_log_body,
6197                         $hash, $hash_parent);
6198 }
6199
6200 sub git_commit {
6201         $hash ||= $hash_base || "HEAD";
6202         my %co = parse_commit($hash)
6203             or die_error(404, "Unknown commit object");
6204
6205         my $parent  = $co{'parent'};
6206         my $parents = $co{'parents'}; # listref
6207
6208         # we need to prepare $formats_nav before any parameter munging
6209         my $formats_nav;
6210         if (!defined $parent) {
6211                 # --root commitdiff
6212                 $formats_nav .= '(initial)';
6213         } elsif (@$parents == 1) {
6214                 # single parent commit
6215                 $formats_nav .=
6216                         '(parent: ' .
6217                         $cgi->a({-href => href(action=>"commit",
6218                                                hash=>$parent)},
6219                                 esc_html(substr($parent, 0, 7))) .
6220                         ')';
6221         } else {
6222                 # merge commit
6223                 $formats_nav .=
6224                         '(merge: ' .
6225                         join(' ', map {
6226                                 $cgi->a({-href => href(action=>"commit",
6227                                                        hash=>$_)},
6228                                         esc_html(substr($_, 0, 7)));
6229                         } @$parents ) .
6230                         ')';
6231         }
6232         if (gitweb_check_feature('patches') && @$parents <= 1) {
6233                 $formats_nav .= " | " .
6234                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6235                                 "patch");
6236         }
6237
6238         if (!defined $parent) {
6239                 $parent = "--root";
6240         }
6241         my @difftree;
6242         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6243                 @diff_opts,
6244                 (@$parents <= 1 ? $parent : '-c'),
6245                 $hash, "--"
6246                 or die_error(500, "Open git-diff-tree failed");
6247         @difftree = map { chomp; $_ } <$fd>;
6248         close $fd or die_error(404, "Reading git-diff-tree failed");
6249
6250         # non-textual hash id's can be cached
6251         my $expires;
6252         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6253                 $expires = "+1d";
6254         }
6255         my $refs = git_get_references();
6256         my $ref = format_ref_marker($refs, $co{'id'});
6257
6258         git_header_html(undef, $expires);
6259         git_print_page_nav('commit', '',
6260                            $hash, $co{'tree'}, $hash,
6261                            $formats_nav);
6262
6263         if (defined $co{'parent'}) {
6264                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6265         } else {
6266                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6267         }
6268         print "<div class=\"title_text\">\n" .
6269               "<table class=\"object_header\">\n";
6270         git_print_authorship_rows(\%co);
6271         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6272         print "<tr>" .
6273               "<td>tree</td>" .
6274               "<td class=\"sha1\">" .
6275               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6276                        class => "list"}, $co{'tree'}) .
6277               "</td>" .
6278               "<td class=\"link\">" .
6279               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6280                       "tree");
6281         my $snapshot_links = format_snapshot_links($hash);
6282         if (defined $snapshot_links) {
6283                 print " | " . $snapshot_links;
6284         }
6285         print "</td>" .
6286               "</tr>\n";
6287
6288         foreach my $par (@$parents) {
6289                 print "<tr>" .
6290                       "<td>parent</td>" .
6291                       "<td class=\"sha1\">" .
6292                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6293                                class => "list"}, $par) .
6294                       "</td>" .
6295                       "<td class=\"link\">" .
6296                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6297                       " | " .
6298                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6299                       "</td>" .
6300                       "</tr>\n";
6301         }
6302         print "</table>".
6303               "</div>\n";
6304
6305         print "<div class=\"page_body\">\n";
6306         git_print_log($co{'comment'});
6307         print "</div>\n";
6308
6309         git_difftree_body(\@difftree, $hash, @$parents);
6310
6311         git_footer_html();
6312 }
6313
6314 sub git_object {
6315         # object is defined by:
6316         # - hash or hash_base alone
6317         # - hash_base and file_name
6318         my $type;
6319
6320         # - hash or hash_base alone
6321         if ($hash || ($hash_base && !defined $file_name)) {
6322                 my $object_id = $hash || $hash_base;
6323
6324                 open my $fd, "-|", quote_command(
6325                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6326                         or die_error(404, "Object does not exist");
6327                 $type = <$fd>;
6328                 chomp $type;
6329                 close $fd
6330                         or die_error(404, "Object does not exist");
6331
6332         # - hash_base and file_name
6333         } elsif ($hash_base && defined $file_name) {
6334                 $file_name =~ s,/+$,,;
6335
6336                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6337                         or die_error(404, "Base object does not exist");
6338
6339                 # here errors should not hapen
6340                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6341                         or die_error(500, "Open git-ls-tree failed");
6342                 my $line = <$fd>;
6343                 close $fd;
6344
6345                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6346                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6347                         die_error(404, "File or directory for given base does not exist");
6348                 }
6349                 $type = $2;
6350                 $hash = $3;
6351         } else {
6352                 die_error(400, "Not enough information to find object");
6353         }
6354
6355         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6356                                           hash=>$hash, hash_base=>$hash_base,
6357                                           file_name=>$file_name),
6358                              -status => '302 Found');
6359 }
6360
6361 sub git_blobdiff {
6362         my $format = shift || 'html';
6363
6364         my $fd;
6365         my @difftree;
6366         my %diffinfo;
6367         my $expires;
6368
6369         # preparing $fd and %diffinfo for git_patchset_body
6370         # new style URI
6371         if (defined $hash_base && defined $hash_parent_base) {
6372                 if (defined $file_name) {
6373                         # read raw output
6374                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6375                                 $hash_parent_base, $hash_base,
6376                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6377                                 or die_error(500, "Open git-diff-tree failed");
6378                         @difftree = map { chomp; $_ } <$fd>;
6379                         close $fd
6380                                 or die_error(404, "Reading git-diff-tree failed");
6381                         @difftree
6382                                 or die_error(404, "Blob diff not found");
6383
6384                 } elsif (defined $hash &&
6385                          $hash =~ /[0-9a-fA-F]{40}/) {
6386                         # try to find filename from $hash
6387
6388                         # read filtered raw output
6389                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6390                                 $hash_parent_base, $hash_base, "--"
6391                                 or die_error(500, "Open git-diff-tree failed");
6392                         @difftree =
6393                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6394                                 # $hash == to_id
6395                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6396                                 map { chomp; $_ } <$fd>;
6397                         close $fd
6398                                 or die_error(404, "Reading git-diff-tree failed");
6399                         @difftree
6400                                 or die_error(404, "Blob diff not found");
6401
6402                 } else {
6403                         die_error(400, "Missing one of the blob diff parameters");
6404                 }
6405
6406                 if (@difftree > 1) {
6407                         die_error(400, "Ambiguous blob diff specification");
6408                 }
6409
6410                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6411                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6412                 $file_name   ||= $diffinfo{'to_file'};
6413
6414                 $hash_parent ||= $diffinfo{'from_id'};
6415                 $hash        ||= $diffinfo{'to_id'};
6416
6417                 # non-textual hash id's can be cached
6418                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6419                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6420                         $expires = '+1d';
6421                 }
6422
6423                 # open patch output
6424                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6425                         '-p', ($format eq 'html' ? "--full-index" : ()),
6426                         $hash_parent_base, $hash_base,
6427                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6428                         or die_error(500, "Open git-diff-tree failed");
6429         }
6430
6431         # old/legacy style URI -- not generated anymore since 1.4.3.
6432         if (!%diffinfo) {
6433                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6434         }
6435
6436         # header
6437         if ($format eq 'html') {
6438                 my $formats_nav =
6439                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6440                                 "raw");
6441                 git_header_html(undef, $expires);
6442                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6443                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6444                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6445                 } else {
6446                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6447                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6448                 }
6449                 if (defined $file_name) {
6450                         git_print_page_path($file_name, "blob", $hash_base);
6451                 } else {
6452                         print "<div class=\"page_path\"></div>\n";
6453                 }
6454
6455         } elsif ($format eq 'plain') {
6456                 print $cgi->header(
6457                         -type => 'text/plain',
6458                         -charset => 'utf-8',
6459                         -expires => $expires,
6460                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6461
6462                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6463
6464         } else {
6465                 die_error(400, "Unknown blobdiff format");
6466         }
6467
6468         # patch
6469         if ($format eq 'html') {
6470                 print "<div class=\"page_body\">\n";
6471
6472                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6473                 close $fd;
6474
6475                 print "</div>\n"; # class="page_body"
6476                 git_footer_html();
6477
6478         } else {
6479                 while (my $line = <$fd>) {
6480                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6481                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6482
6483                         print $line;
6484
6485                         last if $line =~ m!^\+\+\+!;
6486                 }
6487                 local $/ = undef;
6488                 print <$fd>;
6489                 close $fd;
6490         }
6491 }
6492
6493 sub git_blobdiff_plain {
6494         git_blobdiff('plain');
6495 }
6496
6497 sub git_commitdiff {
6498         my %params = @_;
6499         my $format = $params{-format} || 'html';
6500
6501         my ($patch_max) = gitweb_get_feature('patches');
6502         if ($format eq 'patch') {
6503                 die_error(403, "Patch view not allowed") unless $patch_max;
6504         }
6505
6506         $hash ||= $hash_base || "HEAD";
6507         my %co = parse_commit($hash)
6508             or die_error(404, "Unknown commit object");
6509
6510         # choose format for commitdiff for merge
6511         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6512                 $hash_parent = '--cc';
6513         }
6514         # we need to prepare $formats_nav before almost any parameter munging
6515         my $formats_nav;
6516         if ($format eq 'html') {
6517                 $formats_nav =
6518                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6519                                 "raw");
6520                 if ($patch_max && @{$co{'parents'}} <= 1) {
6521                         $formats_nav .= " | " .
6522                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6523                                         "patch");
6524                 }
6525
6526                 if (defined $hash_parent &&
6527                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6528                         # commitdiff with two commits given
6529                         my $hash_parent_short = $hash_parent;
6530                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6531                                 $hash_parent_short = substr($hash_parent, 0, 7);
6532                         }
6533                         $formats_nav .=
6534                                 ' (from';
6535                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6536                                 if ($co{'parents'}[$i] eq $hash_parent) {
6537                                         $formats_nav .= ' parent ' . ($i+1);
6538                                         last;
6539                                 }
6540                         }
6541                         $formats_nav .= ': ' .
6542                                 $cgi->a({-href => href(action=>"commitdiff",
6543                                                        hash=>$hash_parent)},
6544                                         esc_html($hash_parent_short)) .
6545                                 ')';
6546                 } elsif (!$co{'parent'}) {
6547                         # --root commitdiff
6548                         $formats_nav .= ' (initial)';
6549                 } elsif (scalar @{$co{'parents'}} == 1) {
6550                         # single parent commit
6551                         $formats_nav .=
6552                                 ' (parent: ' .
6553                                 $cgi->a({-href => href(action=>"commitdiff",
6554                                                        hash=>$co{'parent'})},
6555                                         esc_html(substr($co{'parent'}, 0, 7))) .
6556                                 ')';
6557                 } else {
6558                         # merge commit
6559                         if ($hash_parent eq '--cc') {
6560                                 $formats_nav .= ' | ' .
6561                                         $cgi->a({-href => href(action=>"commitdiff",
6562                                                                hash=>$hash, hash_parent=>'-c')},
6563                                                 'combined');
6564                         } else { # $hash_parent eq '-c'
6565                                 $formats_nav .= ' | ' .
6566                                         $cgi->a({-href => href(action=>"commitdiff",
6567                                                                hash=>$hash, hash_parent=>'--cc')},
6568                                                 'compact');
6569                         }
6570                         $formats_nav .=
6571                                 ' (merge: ' .
6572                                 join(' ', map {
6573                                         $cgi->a({-href => href(action=>"commitdiff",
6574                                                                hash=>$_)},
6575                                                 esc_html(substr($_, 0, 7)));
6576                                 } @{$co{'parents'}} ) .
6577                                 ')';
6578                 }
6579         }
6580
6581         my $hash_parent_param = $hash_parent;
6582         if (!defined $hash_parent_param) {
6583                 # --cc for multiple parents, --root for parentless
6584                 $hash_parent_param =
6585                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6586         }
6587
6588         # read commitdiff
6589         my $fd;
6590         my @difftree;
6591         if ($format eq 'html') {
6592                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6593                         "--no-commit-id", "--patch-with-raw", "--full-index",
6594                         $hash_parent_param, $hash, "--"
6595                         or die_error(500, "Open git-diff-tree failed");
6596
6597                 while (my $line = <$fd>) {
6598                         chomp $line;
6599                         # empty line ends raw part of diff-tree output
6600                         last unless $line;
6601                         push @difftree, scalar parse_difftree_raw_line($line);
6602                 }
6603
6604         } elsif ($format eq 'plain') {
6605                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6606                         '-p', $hash_parent_param, $hash, "--"
6607                         or die_error(500, "Open git-diff-tree failed");
6608         } elsif ($format eq 'patch') {
6609                 # For commit ranges, we limit the output to the number of
6610                 # patches specified in the 'patches' feature.
6611                 # For single commits, we limit the output to a single patch,
6612                 # diverging from the git-format-patch default.
6613                 my @commit_spec = ();
6614                 if ($hash_parent) {
6615                         if ($patch_max > 0) {
6616                                 push @commit_spec, "-$patch_max";
6617                         }
6618                         push @commit_spec, '-n', "$hash_parent..$hash";
6619                 } else {
6620                         if ($params{-single}) {
6621                                 push @commit_spec, '-1';
6622                         } else {
6623                                 if ($patch_max > 0) {
6624                                         push @commit_spec, "-$patch_max";
6625                                 }
6626                                 push @commit_spec, "-n";
6627                         }
6628                         push @commit_spec, '--root', $hash;
6629                 }
6630                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6631                         '--encoding=utf8', '--stdout', @commit_spec
6632                         or die_error(500, "Open git-format-patch failed");
6633         } else {
6634                 die_error(400, "Unknown commitdiff format");
6635         }
6636
6637         # non-textual hash id's can be cached
6638         my $expires;
6639         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6640                 $expires = "+1d";
6641         }
6642
6643         # write commit message
6644         if ($format eq 'html') {
6645                 my $refs = git_get_references();
6646                 my $ref = format_ref_marker($refs, $co{'id'});
6647
6648                 git_header_html(undef, $expires);
6649                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6650                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6651                 print "<div class=\"title_text\">\n" .
6652                       "<table class=\"object_header\">\n";
6653                 git_print_authorship_rows(\%co);
6654                 print "</table>".
6655                       "</div>\n";
6656                 print "<div class=\"page_body\">\n";
6657                 if (@{$co{'comment'}} > 1) {
6658                         print "<div class=\"log\">\n";
6659                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6660                         print "</div>\n"; # class="log"
6661                 }
6662
6663         } elsif ($format eq 'plain') {
6664                 my $refs = git_get_references("tags");
6665                 my $tagname = git_get_rev_name_tags($hash);
6666                 my $filename = basename($project) . "-$hash.patch";
6667
6668                 print $cgi->header(
6669                         -type => 'text/plain',
6670                         -charset => 'utf-8',
6671                         -expires => $expires,
6672                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6673                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6674                 print "From: " . to_utf8($co{'author'}) . "\n";
6675                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6676                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6677
6678                 print "X-Git-Tag: $tagname\n" if $tagname;
6679                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6680
6681                 foreach my $line (@{$co{'comment'}}) {
6682                         print to_utf8($line) . "\n";
6683                 }
6684                 print "---\n\n";
6685         } elsif ($format eq 'patch') {
6686                 my $filename = basename($project) . "-$hash.patch";
6687
6688                 print $cgi->header(
6689                         -type => 'text/plain',
6690                         -charset => 'utf-8',
6691                         -expires => $expires,
6692                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6693         }
6694
6695         # write patch
6696         if ($format eq 'html') {
6697                 my $use_parents = !defined $hash_parent ||
6698                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6699                 git_difftree_body(\@difftree, $hash,
6700                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6701                 print "<br/>\n";
6702
6703                 git_patchset_body($fd, \@difftree, $hash,
6704                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6705                 close $fd;
6706                 print "</div>\n"; # class="page_body"
6707                 git_footer_html();
6708
6709         } elsif ($format eq 'plain') {
6710                 local $/ = undef;
6711                 print <$fd>;
6712                 close $fd
6713                         or print "Reading git-diff-tree failed\n";
6714         } elsif ($format eq 'patch') {
6715                 local $/ = undef;
6716                 print <$fd>;
6717                 close $fd
6718                         or print "Reading git-format-patch failed\n";
6719         }
6720 }
6721
6722 sub git_commitdiff_plain {
6723         git_commitdiff(-format => 'plain');
6724 }
6725
6726 # format-patch-style patches
6727 sub git_patch {
6728         git_commitdiff(-format => 'patch', -single => 1);
6729 }
6730
6731 sub git_patches {
6732         git_commitdiff(-format => 'patch');
6733 }
6734
6735 sub git_history {
6736         git_log_generic('history', \&git_history_body,
6737                         $hash_base, $hash_parent_base,
6738                         $file_name, $hash);
6739 }
6740
6741 sub git_search {
6742         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6743         if (!defined $searchtext) {
6744                 die_error(400, "Text field is empty");
6745         }
6746         if (!defined $hash) {
6747                 $hash = git_get_head_hash($project);
6748         }
6749         my %co = parse_commit($hash);
6750         if (!%co) {
6751                 die_error(404, "Unknown commit object");
6752         }
6753         if (!defined $page) {
6754                 $page = 0;
6755         }
6756
6757         $searchtype ||= 'commit';
6758         if ($searchtype eq 'pickaxe') {
6759                 # pickaxe may take all resources of your box and run for several minutes
6760                 # with every query - so decide by yourself how public you make this feature
6761                 gitweb_check_feature('pickaxe')
6762                     or die_error(403, "Pickaxe is disabled");
6763         }
6764         if ($searchtype eq 'grep') {
6765                 gitweb_check_feature('grep')
6766                     or die_error(403, "Grep is disabled");
6767         }
6768
6769         git_header_html();
6770
6771         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6772                 my $greptype;
6773                 if ($searchtype eq 'commit') {
6774                         $greptype = "--grep=";
6775                 } elsif ($searchtype eq 'author') {
6776                         $greptype = "--author=";
6777                 } elsif ($searchtype eq 'committer') {
6778                         $greptype = "--committer=";
6779                 }
6780                 $greptype .= $searchtext;
6781                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6782                                                $greptype, '--regexp-ignore-case',
6783                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6784
6785                 my $paging_nav = '';
6786                 if ($page > 0) {
6787                         $paging_nav .=
6788                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6789                                                        searchtext=>$searchtext,
6790                                                        searchtype=>$searchtype)},
6791                                         "first");
6792                         $paging_nav .= " &sdot; " .
6793                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6794                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6795                 } else {
6796                         $paging_nav .= "first";
6797                         $paging_nav .= " &sdot; prev";
6798                 }
6799                 my $next_link = '';
6800                 if ($#commitlist >= 100) {
6801                         $next_link =
6802                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6803                                          -accesskey => "n", -title => "Alt-n"}, "next");
6804                         $paging_nav .= " &sdot; $next_link";
6805                 } else {
6806                         $paging_nav .= " &sdot; next";
6807                 }
6808
6809                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6810                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6811                 if ($page == 0 && !@commitlist) {
6812                         print "<p>No match.</p>\n";
6813                 } else {
6814                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6815                 }
6816         }
6817
6818         if ($searchtype eq 'pickaxe') {
6819                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6820                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6821
6822                 print "<table class=\"pickaxe search\">\n";
6823                 my $alternate = 1;
6824                 local $/ = "\n";
6825                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6826                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6827                         ($search_use_regexp ? '--pickaxe-regex' : ());
6828                 undef %co;
6829                 my @files;
6830                 while (my $line = <$fd>) {
6831                         chomp $line;
6832                         next unless $line;
6833
6834                         my %set = parse_difftree_raw_line($line);
6835                         if (defined $set{'commit'}) {
6836                                 # finish previous commit
6837                                 if (%co) {
6838                                         print "</td>\n" .
6839                                               "<td class=\"link\">" .
6840                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6841                                               " | " .
6842                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6843                                         print "</td>\n" .
6844                                               "</tr>\n";
6845                                 }
6846
6847                                 if ($alternate) {
6848                                         print "<tr class=\"dark\">\n";
6849                                 } else {
6850                                         print "<tr class=\"light\">\n";
6851                                 }
6852                                 $alternate ^= 1;
6853                                 %co = parse_commit($set{'commit'});
6854                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6855                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6856                                       "<td><i>$author</i></td>\n" .
6857                                       "<td>" .
6858                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6859                                               -class => "list subject"},
6860                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6861                         } elsif (defined $set{'to_id'}) {
6862                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6863
6864                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6865                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6866                                               -class => "list"},
6867                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6868                                       "<br/>\n";
6869                         }
6870                 }
6871                 close $fd;
6872
6873                 # finish last commit (warning: repetition!)
6874                 if (%co) {
6875                         print "</td>\n" .
6876                               "<td class=\"link\">" .
6877                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6878                               " | " .
6879                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6880                         print "</td>\n" .
6881                               "</tr>\n";
6882                 }
6883
6884                 print "</table>\n";
6885         }
6886
6887         if ($searchtype eq 'grep') {
6888                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6889                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6890
6891                 print "<table class=\"grep_search\">\n";
6892                 my $alternate = 1;
6893                 my $matches = 0;
6894                 local $/ = "\n";
6895                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6896                         $search_use_regexp ? ('-E', '-i') : '-F',
6897                         $searchtext, $co{'tree'};
6898                 my $lastfile = '';
6899                 while (my $line = <$fd>) {
6900                         chomp $line;
6901                         my ($file, $lno, $ltext, $binary);
6902                         last if ($matches++ > 1000);
6903                         if ($line =~ /^Binary file (.+) matches$/) {
6904                                 $file = $1;
6905                                 $binary = 1;
6906                         } else {
6907                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6908                         }
6909                         if ($file ne $lastfile) {
6910                                 $lastfile and print "</td></tr>\n";
6911                                 if ($alternate++) {
6912                                         print "<tr class=\"dark\">\n";
6913                                 } else {
6914                                         print "<tr class=\"light\">\n";
6915                                 }
6916                                 print "<td class=\"list\">".
6917                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6918                                                                file_name=>"$file"),
6919                                                 -class => "list"}, esc_path($file));
6920                                 print "</td><td>\n";
6921                                 $lastfile = $file;
6922                         }
6923                         if ($binary) {
6924                                 print "<div class=\"binary\">Binary file</div>\n";
6925                         } else {
6926                                 $ltext = untabify($ltext);
6927                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6928                                         $ltext = esc_html($1, -nbsp=>1);
6929                                         $ltext .= '<span class="match">';
6930                                         $ltext .= esc_html($2, -nbsp=>1);
6931                                         $ltext .= '</span>';
6932                                         $ltext .= esc_html($3, -nbsp=>1);
6933                                 } else {
6934                                         $ltext = esc_html($ltext, -nbsp=>1);
6935                                 }
6936                                 print "<div class=\"pre\">" .
6937                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6938                                                                file_name=>"$file").'#l'.$lno,
6939                                                 -class => "linenr"}, sprintf('%4i', $lno))
6940                                         . ' ' .  $ltext . "</div>\n";
6941                         }
6942                 }
6943                 if ($lastfile) {
6944                         print "</td></tr>\n";
6945                         if ($matches > 1000) {
6946                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6947                         }
6948                 } else {
6949                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6950                 }
6951                 close $fd;
6952
6953                 print "</table>\n";
6954         }
6955         git_footer_html();
6956 }
6957
6958 sub git_search_help {
6959         git_header_html();
6960         git_print_page_nav('','', $hash,$hash,$hash);
6961         print <<EOT;
6962 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6963 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6964 the pattern entered is recognized as the POSIX extended
6965 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6966 insensitive).</p>
6967 <dl>
6968 <dt><b>commit</b></dt>
6969 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6970 EOT
6971         my $have_grep = gitweb_check_feature('grep');
6972         if ($have_grep) {
6973                 print <<EOT;
6974 <dt><b>grep</b></dt>
6975 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6976     a different one) are searched for the given pattern. On large trees, this search can take
6977 a while and put some strain on the server, so please use it with some consideration. Note that
6978 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6979 case-sensitive.</dd>
6980 EOT
6981         }
6982         print <<EOT;
6983 <dt><b>author</b></dt>
6984 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6985 <dt><b>committer</b></dt>
6986 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6987 EOT
6988         my $have_pickaxe = gitweb_check_feature('pickaxe');
6989         if ($have_pickaxe) {
6990                 print <<EOT;
6991 <dt><b>pickaxe</b></dt>
6992 <dd>All commits that caused the string to appear or disappear from any file (changes that
6993 added, removed or "modified" the string) will be listed. This search can take a while and
6994 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6995 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6996 EOT
6997         }
6998         print "</dl>\n";
6999         git_footer_html();
7000 }
7001
7002 sub git_shortlog {
7003         git_log_generic('shortlog', \&git_shortlog_body,
7004                         $hash, $hash_parent);
7005 }
7006
7007 ## ......................................................................
7008 ## feeds (RSS, Atom; OPML)
7009
7010 sub git_feed {
7011         my $format = shift || 'atom';
7012         my $have_blame = gitweb_check_feature('blame');
7013
7014         # Atom: http://www.atomenabled.org/developers/syndication/
7015         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7016         if ($format ne 'rss' && $format ne 'atom') {
7017                 die_error(400, "Unknown web feed format");
7018         }
7019
7020         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7021         my $head = $hash || 'HEAD';
7022         my @commitlist = parse_commits($head, 150, 0, $file_name);
7023
7024         my %latest_commit;
7025         my %latest_date;
7026         my $content_type = "application/$format+xml";
7027         if (defined $cgi->http('HTTP_ACCEPT') &&
7028                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7029                 # browser (feed reader) prefers text/xml
7030                 $content_type = 'text/xml';
7031         }
7032         if (defined($commitlist[0])) {
7033                 %latest_commit = %{$commitlist[0]};
7034                 my $latest_epoch = $latest_commit{'committer_epoch'};
7035                 %latest_date   = parse_date($latest_epoch);
7036                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7037                 if (defined $if_modified) {
7038                         my $since;
7039                         if (eval { require HTTP::Date; 1; }) {
7040                                 $since = HTTP::Date::str2time($if_modified);
7041                         } elsif (eval { require Time::ParseDate; 1; }) {
7042                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7043                         }
7044                         if (defined $since && $latest_epoch <= $since) {
7045                                 print $cgi->header(
7046                                         -type => $content_type,
7047                                         -charset => 'utf-8',
7048                                         -last_modified => $latest_date{'rfc2822'},
7049                                         -status => '304 Not Modified');
7050                                 return;
7051                         }
7052                 }
7053                 print $cgi->header(
7054                         -type => $content_type,
7055                         -charset => 'utf-8',
7056                         -last_modified => $latest_date{'rfc2822'});
7057         } else {
7058                 print $cgi->header(
7059                         -type => $content_type,
7060                         -charset => 'utf-8');
7061         }
7062
7063         # Optimization: skip generating the body if client asks only
7064         # for Last-Modified date.
7065         return if ($cgi->request_method() eq 'HEAD');
7066
7067         # header variables
7068         my $title = "$site_name - $project/$action";
7069         my $feed_type = 'log';
7070         if (defined $hash) {
7071                 $title .= " - '$hash'";
7072                 $feed_type = 'branch log';
7073                 if (defined $file_name) {
7074                         $title .= " :: $file_name";
7075                         $feed_type = 'history';
7076                 }
7077         } elsif (defined $file_name) {
7078                 $title .= " - $file_name";
7079                 $feed_type = 'history';
7080         }
7081         $title .= " $feed_type";
7082         my $descr = git_get_project_description($project);
7083         if (defined $descr) {
7084                 $descr = esc_html($descr);
7085         } else {
7086                 $descr = "$project " .
7087                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7088                          " feed";
7089         }
7090         my $owner = git_get_project_owner($project);
7091         $owner = esc_html($owner);
7092
7093         #header
7094         my $alt_url;
7095         if (defined $file_name) {
7096                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7097         } elsif (defined $hash) {
7098                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7099         } else {
7100                 $alt_url = href(-full=>1, action=>"summary");
7101         }
7102         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7103         if ($format eq 'rss') {
7104                 print <<XML;
7105 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7106 <channel>
7107 XML
7108                 print "<title>$title</title>\n" .
7109                       "<link>$alt_url</link>\n" .
7110                       "<description>$descr</description>\n" .
7111                       "<language>en</language>\n" .
7112                       # project owner is responsible for 'editorial' content
7113                       "<managingEditor>$owner</managingEditor>\n";
7114                 if (defined $logo || defined $favicon) {
7115                         # prefer the logo to the favicon, since RSS
7116                         # doesn't allow both
7117                         my $img = esc_url($logo || $favicon);
7118                         print "<image>\n" .
7119                               "<url>$img</url>\n" .
7120                               "<title>$title</title>\n" .
7121                               "<link>$alt_url</link>\n" .
7122                               "</image>\n";
7123                 }
7124                 if (%latest_date) {
7125                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7126                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7127                 }
7128                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7129         } elsif ($format eq 'atom') {
7130                 print <<XML;
7131 <feed xmlns="http://www.w3.org/2005/Atom">
7132 XML
7133                 print "<title>$title</title>\n" .
7134                       "<subtitle>$descr</subtitle>\n" .
7135                       '<link rel="alternate" type="text/html" href="' .
7136                       $alt_url . '" />' . "\n" .
7137                       '<link rel="self" type="' . $content_type . '" href="' .
7138                       $cgi->self_url() . '" />' . "\n" .
7139                       "<id>" . href(-full=>1) . "</id>\n" .
7140                       # use project owner for feed author
7141                       "<author><name>$owner</name></author>\n";
7142                 if (defined $favicon) {
7143                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7144                 }
7145                 if (defined $logo_url) {
7146                         # not twice as wide as tall: 72 x 27 pixels
7147                         print "<logo>" . esc_url($logo) . "</logo>\n";
7148                 }
7149                 if (! %latest_date) {
7150                         # dummy date to keep the feed valid until commits trickle in:
7151                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7152                 } else {
7153                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7154                 }
7155                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7156         }
7157
7158         # contents
7159         for (my $i = 0; $i <= $#commitlist; $i++) {
7160                 my %co = %{$commitlist[$i]};
7161                 my $commit = $co{'id'};
7162                 # we read 150, we always show 30 and the ones more recent than 48 hours
7163                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7164                         last;
7165                 }
7166                 my %cd = parse_date($co{'author_epoch'});
7167
7168                 # get list of changed files
7169                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7170                         $co{'parent'} || "--root",
7171                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7172                         or next;
7173                 my @difftree = map { chomp; $_ } <$fd>;
7174                 close $fd
7175                         or next;
7176
7177                 # print element (entry, item)
7178                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7179                 if ($format eq 'rss') {
7180                         print "<item>\n" .
7181                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7182                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7183                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7184                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7185                               "<link>$co_url</link>\n" .
7186                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7187                               "<content:encoded>" .
7188                               "<![CDATA[\n";
7189                 } elsif ($format eq 'atom') {
7190                         print "<entry>\n" .
7191                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7192                               "<updated>$cd{'iso-8601'}</updated>\n" .
7193                               "<author>\n" .
7194                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7195                         if ($co{'author_email'}) {
7196                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7197                         }
7198                         print "</author>\n" .
7199                               # use committer for contributor
7200                               "<contributor>\n" .
7201                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7202                         if ($co{'committer_email'}) {
7203                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7204                         }
7205                         print "</contributor>\n" .
7206                               "<published>$cd{'iso-8601'}</published>\n" .
7207                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7208                               "<id>$co_url</id>\n" .
7209                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7210                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7211                 }
7212                 my $comment = $co{'comment'};
7213                 print "<pre>\n";
7214                 foreach my $line (@$comment) {
7215                         $line = esc_html($line);
7216                         print "$line\n";
7217                 }
7218                 print "</pre><ul>\n";
7219                 foreach my $difftree_line (@difftree) {
7220                         my %difftree = parse_difftree_raw_line($difftree_line);
7221                         next if !$difftree{'from_id'};
7222
7223                         my $file = $difftree{'file'} || $difftree{'to_file'};
7224
7225                         print "<li>" .
7226                               "[" .
7227                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7228                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7229                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7230                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7231                                       -title => "diff"}, 'D');
7232                         if ($have_blame) {
7233                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7234                                                              file_name=>$file, hash_base=>$commit),
7235                                               -title => "blame"}, 'B');
7236                         }
7237                         # if this is not a feed of a file history
7238                         if (!defined $file_name || $file_name ne $file) {
7239                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7240                                                              file_name=>$file, hash=>$commit),
7241                                               -title => "history"}, 'H');
7242                         }
7243                         $file = esc_path($file);
7244                         print "] ".
7245                               "$file</li>\n";
7246                 }
7247                 if ($format eq 'rss') {
7248                         print "</ul>]]>\n" .
7249                               "</content:encoded>\n" .
7250                               "</item>\n";
7251                 } elsif ($format eq 'atom') {
7252                         print "</ul>\n</div>\n" .
7253                               "</content>\n" .
7254                               "</entry>\n";
7255                 }
7256         }
7257
7258         # end of feed
7259         if ($format eq 'rss') {
7260                 print "</channel>\n</rss>\n";
7261         } elsif ($format eq 'atom') {
7262                 print "</feed>\n";
7263         }
7264 }
7265
7266 sub git_rss {
7267         git_feed('rss');
7268 }
7269
7270 sub git_atom {
7271         git_feed('atom');
7272 }
7273
7274 sub git_opml {
7275         my @list = git_get_projects_list();
7276
7277         print $cgi->header(
7278                 -type => 'text/xml',
7279                 -charset => 'utf-8',
7280                 -content_disposition => 'inline; filename="opml.xml"');
7281
7282         print <<XML;
7283 <?xml version="1.0" encoding="utf-8"?>
7284 <opml version="1.0">
7285 <head>
7286   <title>$site_name OPML Export</title>
7287 </head>
7288 <body>
7289 <outline text="git RSS feeds">
7290 XML
7291
7292         foreach my $pr (@list) {
7293                 my %proj = %$pr;
7294                 my $head = git_get_head_hash($proj{'path'});
7295                 if (!defined $head) {
7296                         next;
7297                 }
7298                 $git_dir = "$projectroot/$proj{'path'}";
7299                 my %co = parse_commit($head);
7300                 if (!%co) {
7301                         next;
7302                 }
7303
7304                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7305                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7306                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7307                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7308         }
7309         print <<XML;
7310 </outline>
7311 </body>
7312 </opml>
7313 XML
7314 }