gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "++GIT_VERSION++";
  32
  33 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  34 sub evaluate_uri {
  35         our $cgi;
  36
  37         our $my_url = $cgi->url();
  38         our $my_uri = $cgi->url(-absolute => 1);
  39
  40         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  41         # needed and used only for URLs with nonempty PATH_INFO
  42         our $base_url = $my_url;
  43
  44         # When the script is used as DirectoryIndex, the URL does not contain the name
  45         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  46         # have to do it ourselves. We make $path_info global because it's also used
  47         # later on.
  48         #
  49         # Another issue with the script being the DirectoryIndex is that the resulting
  50         # $my_url data is not the full script URL: this is good, because we want
  51         # generated links to keep implying the script name if it wasn't explicitly
  52         # indicated in the URL we're handling, but it means that $my_url cannot be used
  53         # as base URL.
  54         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  55         # to build the base URL ourselves:
  56         our $path_info = $ENV{"PATH_INFO"};
  57         if ($path_info) {
  58                 if ($my_url =~ s,\Q$path_info\E$,, &&
  59                     $my_uri =~ s,\Q$path_info\E$,, &&
  60                     defined $ENV{'SCRIPT_NAME'}) {
  61                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  62                 }
  63         }
  64
  65         # target of the home link on top of all pages
  66         our $home_link = $my_uri || "/";
  67 }
  68
  69 # core git executable to use
  70 # this can just be "git" if your webserver has a sensible PATH
  71 our $GIT = "++GIT_BINDIR++/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "++GITWEB_PROJECTROOT++";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  83
  84 # name of your site or organization to appear in page titles
  85 # replace this with something more descriptive for clearer bookmarks
  86 our $site_name = "++GITWEB_SITENAME++"
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "++GITWEB_SITE_HEADER++";
  91 # html text to include at home page
  92 our $home_text = "++GITWEB_HOMETEXT++";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "++GITWEB_SITE_FOOTER++";
  95
  96 # URI of stylesheets
  97 our @stylesheets = ("++GITWEB_CSS++");
  98 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  99 our $stylesheet = undef;
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # information about snapshot formats that gitweb is capable of serving
 169 our %known_snapshot_formats = (
 170         # name => {
 171         #       'display' => display name,
 172         #       'type' => mime type,
 173         #       'suffix' => filename suffix,
 174         #       'format' => --format for git-archive,
 175         #       'compressor' => [compressor command and arguments]
 176         #                       (array reference, optional)
 177         #       'disabled' => boolean (optional)}
 178         #
 179         'tgz' => {
 180                 'display' => 'tar.gz',
 181                 'type' => 'application/x-gzip',
 182                 'suffix' => '.tar.gz',
 183                 'format' => 'tar',
 184                 'compressor' => ['gzip']},
 185
 186         'tbz2' => {
 187                 'display' => 'tar.bz2',
 188                 'type' => 'application/x-bzip2',
 189                 'suffix' => '.tar.bz2',
 190                 'format' => 'tar',
 191                 'compressor' => ['bzip2']},
 192
 193         'txz' => {
 194                 'display' => 'tar.xz',
 195                 'type' => 'application/x-xz',
 196                 'suffix' => '.tar.xz',
 197                 'format' => 'tar',
 198                 'compressor' => ['xz'],
 199                 'disabled' => 1},
 200
 201         'zip' => {
 202                 'display' => 'zip',
 203                 'type' => 'application/x-zip',
 204                 'suffix' => '.zip',
 205                 'format' => 'zip'},
 206 );
 207
 208 # Aliases so we understand old gitweb.snapshot values in repository
 209 # configuration.
 210 our %known_snapshot_format_aliases = (
 211         'gzip'  => 'tgz',
 212         'bzip2' => 'tbz2',
 213         'xz'    => 'txz',
 214
 215         # backward compatibility: legacy gitweb config support
 216         'x-gzip' => undef, 'gz' => undef,
 217         'x-bzip2' => undef, 'bz2' => undef,
 218         'x-zip' => undef, '' => undef,
 219 );
 220
 221 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 222 # are changed, it may be appropriate to change these values too via
 223 # $GITWEB_CONFIG.
 224 our %avatar_size = (
 225         'default' => 16,
 226         'double'  => 32
 227 );
 228
 229 # Used to set the maximum load that we will still respond to gitweb queries.
 230 # If server load exceed this value then return "503 server busy" error.
 231 # If gitweb cannot determined server load, it is taken to be 0.
 232 # Leave it undefined (or set to 'undef') to turn off load checking.
 233 our $maxload = 300;
 234
 235 # configuration for 'highlight' (http://www.andre-simon.de/)
 236 # match by basename
 237 our %highlight_basename = (
 238         #'Program' => 'py',
 239         #'Library' => 'py',
 240         'SConstruct' => 'py', # SCons equivalent of Makefile
 241         'Makefile' => 'make',
 242 );
 243 # match by extension
 244 our %highlight_ext = (
 245         # main extensions, defining name of syntax;
 246         # see files in /usr/share/highlight/langDefs/ directory
 247         map { $_ => $_ }
 248                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 249         # alternate extensions, see /etc/highlight/filetypes.conf
 250         'h' => 'c',
 251         map { $_ => 'cpp' } qw(cxx c++ cc),
 252         map { $_ => 'php' } qw(php3 php4),
 253         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 254         'mak' => 'make',
 255         map { $_ => 'xml' } qw(xhtml html htm),
 256 );
 257
 258 # You define site-wide feature defaults here; override them with
 259 # $GITWEB_CONFIG as necessary.
 260 our %feature = (
 261         # feature => {
 262         #       'sub' => feature-sub (subroutine),
 263         #       'override' => allow-override (boolean),
 264         #       'default' => [ default options...] (array reference)}
 265         #
 266         # if feature is overridable (it means that allow-override has true value),
 267         # then feature-sub will be called with default options as parameters;
 268         # return value of feature-sub indicates if to enable specified feature
 269         #
 270         # if there is no 'sub' key (no feature-sub), then feature cannot be
 271         # overridden
 272         #
 273         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 274         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 275         # is enabled
 276
 277         # Enable the 'blame' blob view, showing the last commit that modified
 278         # each line in the file. This can be very CPU-intensive.
 279
 280         # To enable system wide have in $GITWEB_CONFIG
 281         # $feature{'blame'}{'default'} = [1];
 282         # To have project specific config enable override in $GITWEB_CONFIG
 283         # $feature{'blame'}{'override'} = 1;
 284         # and in project config gitweb.blame = 0|1;
 285         'blame' => {
 286                 'sub' => sub { feature_bool('blame', @_) },
 287                 'override' => 0,
 288                 'default' => [0]},
 289
 290         # Enable the 'snapshot' link, providing a compressed archive of any
 291         # tree. This can potentially generate high traffic if you have large
 292         # project.
 293
 294         # Value is a list of formats defined in %known_snapshot_formats that
 295         # you wish to offer.
 296         # To disable system wide have in $GITWEB_CONFIG
 297         # $feature{'snapshot'}{'default'} = [];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'snapshot'}{'override'} = 1;
 300         # and in project config, a comma-separated list of formats or "none"
 301         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 302         'snapshot' => {
 303                 'sub' => \&feature_snapshot,
 304                 'override' => 0,
 305                 'default' => ['tgz']},
 306
 307         # Enable text search, which will list the commits which match author,
 308         # committer or commit text to a given string.  Enabled by default.
 309         # Project specific override is not supported.
 310         'search' => {
 311                 'override' => 0,
 312                 'default' => [1]},
 313
 314         # Enable grep search, which will list the files in currently selected
 315         # tree containing the given string. Enabled by default. This can be
 316         # potentially CPU-intensive, of course.
 317
 318         # To enable system wide have in $GITWEB_CONFIG
 319         # $feature{'grep'}{'default'} = [1];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'grep'}{'override'} = 1;
 322         # and in project config gitweb.grep = 0|1;
 323         'grep' => {
 324                 'sub' => sub { feature_bool('grep', @_) },
 325                 'override' => 0,
 326                 'default' => [1]},
 327
 328         # Enable the pickaxe search, which will list the commits that modified
 329         # a given string in a file. This can be practical and quite faster
 330         # alternative to 'blame', but still potentially CPU-intensive.
 331
 332         # To enable system wide have in $GITWEB_CONFIG
 333         # $feature{'pickaxe'}{'default'} = [1];
 334         # To have project specific config enable override in $GITWEB_CONFIG
 335         # $feature{'pickaxe'}{'override'} = 1;
 336         # and in project config gitweb.pickaxe = 0|1;
 337         'pickaxe' => {
 338                 'sub' => sub { feature_bool('pickaxe', @_) },
 339                 'override' => 0,
 340                 'default' => [1]},
 341
 342         # Enable showing size of blobs in a 'tree' view, in a separate
 343         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 344
 345         # To disable system wide have in $GITWEB_CONFIG
 346         # $feature{'show-sizes'}{'default'} = [0];
 347         # To have project specific config enable override in $GITWEB_CONFIG
 348         # $feature{'show-sizes'}{'override'} = 1;
 349         # and in project config gitweb.showsizes = 0|1;
 350         'show-sizes' => {
 351                 'sub' => sub { feature_bool('showsizes', @_) },
 352                 'override' => 0,
 353                 'default' => [1]},
 354
 355         # Make gitweb use an alternative format of the URLs which can be
 356         # more readable and natural-looking: project name is embedded
 357         # directly in the path and the query string contains other
 358         # auxiliary information. All gitweb installations recognize
 359         # URL in either format; this configures in which formats gitweb
 360         # generates links.
 361
 362         # To enable system wide have in $GITWEB_CONFIG
 363         # $feature{'pathinfo'}{'default'} = [1];
 364         # Project specific override is not supported.
 365
 366         # Note that you will need to change the default location of CSS,
 367         # favicon, logo and possibly other files to an absolute URL. Also,
 368         # if gitweb.cgi serves as your indexfile, you will need to force
 369         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 370         'pathinfo' => {
 371                 'override' => 0,
 372                 'default' => [0]},
 373
 374         # Make gitweb consider projects in project root subdirectories
 375         # to be forks of existing projects. Given project $projname.git,
 376         # projects matching $projname/*.git will not be shown in the main
 377         # projects list, instead a '+' mark will be added to $projname
 378         # there and a 'forks' view will be enabled for the project, listing
 379         # all the forks. If project list is taken from a file, forks have
 380         # to be listed after the main project.
 381
 382         # To enable system wide have in $GITWEB_CONFIG
 383         # $feature{'forks'}{'default'} = [1];
 384         # Project specific override is not supported.
 385         'forks' => {
 386                 'override' => 0,
 387                 'default' => [0]},
 388
 389         # Insert custom links to the action bar of all project pages.
 390         # This enables you mainly to link to third-party scripts integrating
 391         # into gitweb; e.g. git-browser for graphical history representation
 392         # or custom web-based repository administration interface.
 393
 394         # The 'default' value consists of a list of triplets in the form
 395         # (label, link, position) where position is the label after which
 396         # to insert the link and link is a format string where %n expands
 397         # to the project name, %f to the project path within the filesystem,
 398         # %h to the current hash (h gitweb parameter) and %b to the current
 399         # hash base (hb gitweb parameter); %% expands to %.
 400
 401         # To enable system wide have in $GITWEB_CONFIG e.g.
 402         # $feature{'actions'}{'default'} = [('graphiclog',
 403         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 404         # Project specific override is not supported.
 405         'actions' => {
 406                 'override' => 0,
 407                 'default' => []},
 408
 409         # Allow gitweb scan project content tags described in ctags/
 410         # of project repository, and display the popular Web 2.0-ish
 411         # "tag cloud" near the project list. Note that this is something
 412         # COMPLETELY different from the normal Git tags.
 413
 414         # gitweb by itself can show existing tags, but it does not handle
 415         # tagging itself; you need an external application for that.
 416         # For an example script, check Girocco's cgi/tagproj.cgi.
 417         # You may want to install the HTML::TagCloud Perl module to get
 418         # a pretty tag cloud instead of just a list of tags.
 419
 420         # To enable system wide have in $GITWEB_CONFIG
 421         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 422         # Project specific override is not supported.
 423         'ctags' => {
 424                 'override' => 0,
 425                 'default' => [0]},
 426
 427         # The maximum number of patches in a patchset generated in patch
 428         # view. Set this to 0 or undef to disable patch view, or to a
 429         # negative number to remove any limit.
 430
 431         # To disable system wide have in $GITWEB_CONFIG
 432         # $feature{'patches'}{'default'} = [0];
 433         # To have project specific config enable override in $GITWEB_CONFIG
 434         # $feature{'patches'}{'override'} = 1;
 435         # and in project config gitweb.patches = 0|n;
 436         # where n is the maximum number of patches allowed in a patchset.
 437         'patches' => {
 438                 'sub' => \&feature_patches,
 439                 'override' => 0,
 440                 'default' => [16]},
 441
 442         # Avatar support. When this feature is enabled, views such as
 443         # shortlog or commit will display an avatar associated with
 444         # the email of the committer(s) and/or author(s).
 445
 446         # Currently available providers are gravatar and picon.
 447         # If an unknown provider is specified, the feature is disabled.
 448
 449         # Gravatar depends on Digest::MD5.
 450         # Picon currently relies on the indiana.edu database.
 451
 452         # To enable system wide have in $GITWEB_CONFIG
 453         # $feature{'avatar'}{'default'} = ['<provider>'];
 454         # where <provider> is either gravatar or picon.
 455         # To have project specific config enable override in $GITWEB_CONFIG
 456         # $feature{'avatar'}{'override'} = 1;
 457         # and in project config gitweb.avatar = <provider>;
 458         'avatar' => {
 459                 'sub' => \&feature_avatar,
 460                 'override' => 0,
 461                 'default' => ['']},
 462
 463         # Enable displaying how much time and how many git commands
 464         # it took to generate and display page.  Disabled by default.
 465         # Project specific override is not supported.
 466         'timed' => {
 467                 'override' => 0,
 468                 'default' => [0]},
 469
 470         # Enable turning some links into links to actions which require
 471         # JavaScript to run (like 'blame_incremental').  Not enabled by
 472         # default.  Project specific override is currently not supported.
 473         'javascript-actions' => {
 474                 'override' => 0,
 475                 'default' => [0]},
 476
 477         # Syntax highlighting support. This is based on Daniel Svensson's
 478         # and Sham Chukoury's work in gitweb-xmms2.git.
 479         # It requires the 'highlight' program present in $PATH,
 480         # and therefore is disabled by default.
 481
 482         # To enable system wide have in $GITWEB_CONFIG
 483         # $feature{'highlight'}{'default'} = [1];
 484
 485         'highlight' => {
 486                 'sub' => sub { feature_bool('highlight', @_) },
 487                 'override' => 0,
 488                 'default' => [0]},
 489 );
 490
 491 sub gitweb_get_feature {
 492         my ($name) = @_;
 493         return unless exists $feature{$name};
 494         my ($sub, $override, @defaults) = (
 495                 $feature{$name}{'sub'},
 496                 $feature{$name}{'override'},
 497                 @{$feature{$name}{'default'}});
 498         # project specific override is possible only if we have project
 499         our $git_dir; # global variable, declared later
 500         if (!$override || !defined $git_dir) {
 501                 return @defaults;
 502         }
 503         if (!defined $sub) {
 504                 warn "feature $name is not overridable";
 505                 return @defaults;
 506         }
 507         return $sub->(@defaults);
 508 }
 509
 510 # A wrapper to check if a given feature is enabled.
 511 # With this, you can say
 512 #
 513 #   my $bool_feat = gitweb_check_feature('bool_feat');
 514 #   gitweb_check_feature('bool_feat') or somecode;
 515 #
 516 # instead of
 517 #
 518 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 519 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 520 #
 521 sub gitweb_check_feature {
 522         return (gitweb_get_feature(@_))[0];
 523 }
 524
 525
 526 sub feature_bool {
 527         my $key = shift;
 528         my ($val) = git_get_project_config($key, '--bool');
 529
 530         if (!defined $val) {
 531                 return ($_[0]);
 532         } elsif ($val eq 'true') {
 533                 return (1);
 534         } elsif ($val eq 'false') {
 535                 return (0);
 536         }
 537 }
 538
 539 sub feature_snapshot {
 540         my (@fmts) = @_;
 541
 542         my ($val) = git_get_project_config('snapshot');
 543
 544         if ($val) {
 545                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 546         }
 547
 548         return @fmts;
 549 }
 550
 551 sub feature_patches {
 552         my @val = (git_get_project_config('patches', '--int'));
 553
 554         if (@val) {
 555                 return @val;
 556         }
 557
 558         return ($_[0]);
 559 }
 560
 561 sub feature_avatar {
 562         my @val = (git_get_project_config('avatar'));
 563
 564         return @val ? @val : @_;
 565 }
 566
 567 # checking HEAD file with -e is fragile if the repository was
 568 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 569 # and then pruned.
 570 sub check_head_link {
 571         my ($dir) = @_;
 572         my $headfile = "$dir/HEAD";
 573         return ((-e $headfile) ||
 574                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 575 }
 576
 577 sub check_export_ok {
 578         my ($dir) = @_;
 579         return (check_head_link($dir) &&
 580                 (!$export_ok || -e "$dir/$export_ok") &&
 581                 (!$export_auth_hook || $export_auth_hook->($dir)));
 582 }
 583
 584 # process alternate names for backward compatibility
 585 # filter out unsupported (unknown) snapshot formats
 586 sub filter_snapshot_fmts {
 587         my @fmts = @_;
 588
 589         @fmts = map {
 590                 exists $known_snapshot_format_aliases{$_} ?
 591                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 592         @fmts = grep {
 593                 exists $known_snapshot_formats{$_} &&
 594                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 595 }
 596
 597 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 598 sub evaluate_gitweb_config {
 599         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 600         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 601         # die if there are errors parsing config file
 602         if (-e $GITWEB_CONFIG) {
 603                 do $GITWEB_CONFIG;
 604                 die $@ if $@;
 605         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 606                 do $GITWEB_CONFIG_SYSTEM;
 607                 die $@ if $@;
 608         }
 609 }
 610
 611 # Get loadavg of system, to compare against $maxload.
 612 # Currently it requires '/proc/loadavg' present to get loadavg;
 613 # if it is not present it returns 0, which means no load checking.
 614 sub get_loadavg {
 615         if( -e '/proc/loadavg' ){
 616                 open my $fd, '<', '/proc/loadavg'
 617                         or return 0;
 618                 my @load = split(/\s+/, scalar <$fd>);
 619                 close $fd;
 620
 621                 # The first three columns measure CPU and IO utilization of the last one,
 622                 # five, and 10 minute periods.  The fourth column shows the number of
 623                 # currently running processes and the total number of processes in the m/n
 624                 # format.  The last column displays the last process ID used.
 625                 return $load[0] || 0;
 626         }
 627         # additional checks for load average should go here for things that don't export
 628         # /proc/loadavg
 629
 630         return 0;
 631 }
 632
 633 # version of the core git binary
 634 our $git_version;
 635 sub evaluate_git_version {
 636         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 637         $number_of_git_cmds++;
 638 }
 639
 640 sub check_loadavg {
 641         if (defined $maxload && get_loadavg() > $maxload) {
 642                 die_error(503, "The load average on the server is too high");
 643         }
 644 }
 645
 646 # ======================================================================
 647 # input validation and dispatch
 648
 649 # input parameters can be collected from a variety of sources (presently, CGI
 650 # and PATH_INFO), so we define an %input_params hash that collects them all
 651 # together during validation: this allows subsequent uses (e.g. href()) to be
 652 # agnostic of the parameter origin
 653
 654 our %input_params = ();
 655
 656 # input parameters are stored with the long parameter name as key. This will
 657 # also be used in the href subroutine to convert parameters to their CGI
 658 # equivalent, and since the href() usage is the most frequent one, we store
 659 # the name -> CGI key mapping here, instead of the reverse.
 660 #
 661 # XXX: Warning: If you touch this, check the search form for updating,
 662 # too.
 663
 664 our @cgi_param_mapping = (
 665         project => "p",
 666         action => "a",
 667         file_name => "f",
 668         file_parent => "fp",
 669         hash => "h",
 670         hash_parent => "hp",
 671         hash_base => "hb",
 672         hash_parent_base => "hpb",
 673         page => "pg",
 674         order => "o",
 675         searchtext => "s",
 676         searchtype => "st",
 677         snapshot_format => "sf",
 678         extra_options => "opt",
 679         search_use_regexp => "sr",
 680         # this must be last entry (for manipulation from JavaScript)
 681         javascript => "js"
 682 );
 683 our %cgi_param_mapping = @cgi_param_mapping;
 684
 685 # we will also need to know the possible actions, for validation
 686 our %actions = (
 687         "blame" => \&git_blame,
 688         "blame_incremental" => \&git_blame_incremental,
 689         "blame_data" => \&git_blame_data,
 690         "blobdiff" => \&git_blobdiff,
 691         "blobdiff_plain" => \&git_blobdiff_plain,
 692         "blob" => \&git_blob,
 693         "blob_plain" => \&git_blob_plain,
 694         "commitdiff" => \&git_commitdiff,
 695         "commitdiff_plain" => \&git_commitdiff_plain,
 696         "commit" => \&git_commit,
 697         "forks" => \&git_forks,
 698         "heads" => \&git_heads,
 699         "history" => \&git_history,
 700         "log" => \&git_log,
 701         "patch" => \&git_patch,
 702         "patches" => \&git_patches,
 703         "rss" => \&git_rss,
 704         "atom" => \&git_atom,
 705         "search" => \&git_search,
 706         "search_help" => \&git_search_help,
 707         "shortlog" => \&git_shortlog,
 708         "summary" => \&git_summary,
 709         "tag" => \&git_tag,
 710         "tags" => \&git_tags,
 711         "tree" => \&git_tree,
 712         "snapshot" => \&git_snapshot,
 713         "object" => \&git_object,
 714         # those below don't need $project
 715         "opml" => \&git_opml,
 716         "project_list" => \&git_project_list,
 717         "project_index" => \&git_project_index,
 718 );
 719
 720 # finally, we have the hash of allowed extra_options for the commands that
 721 # allow them
 722 our %allowed_options = (
 723         "--no-merges" => [ qw(rss atom log shortlog history) ],
 724 );
 725
 726 # fill %input_params with the CGI parameters. All values except for 'opt'
 727 # should be single values, but opt can be an array. We should probably
 728 # build an array of parameters that can be multi-valued, but since for the time
 729 # being it's only this one, we just single it out
 730 sub evaluate_query_params {
 731         our $cgi;
 732
 733         while (my ($name, $symbol) = each %cgi_param_mapping) {
 734                 if ($symbol eq 'opt') {
 735                         $input_params{$name} = [ $cgi->param($symbol) ];
 736                 } else {
 737                         $input_params{$name} = $cgi->param($symbol);
 738                 }
 739         }
 740 }
 741
 742 # now read PATH_INFO and update the parameter list for missing parameters
 743 sub evaluate_path_info {
 744         return if defined $input_params{'project'};
 745         return if !$path_info;
 746         $path_info =~ s,^/+,,;
 747         return if !$path_info;
 748
 749         # find which part of PATH_INFO is project
 750         my $project = $path_info;
 751         $project =~ s,/+$,,;
 752         while ($project && !check_head_link("$projectroot/$project")) {
 753                 $project =~ s,/*[^/]*$,,;
 754         }
 755         return unless $project;
 756         $input_params{'project'} = $project;
 757
 758         # do not change any parameters if an action is given using the query string
 759         return if $input_params{'action'};
 760         $path_info =~ s,^\Q$project\E/*,,;
 761
 762         # next, check if we have an action
 763         my $action = $path_info;
 764         $action =~ s,/.*$,,;
 765         if (exists $actions{$action}) {
 766                 $path_info =~ s,^$action/*,,;
 767                 $input_params{'action'} = $action;
 768         }
 769
 770         # list of actions that want hash_base instead of hash, but can have no
 771         # pathname (f) parameter
 772         my @wants_base = (
 773                 'tree',
 774                 'history',
 775         );
 776
 777         # we want to catch
 778         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 779         my ($parentrefname, $parentpathname, $refname, $pathname) =
 780                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 781
 782         # first, analyze the 'current' part
 783         if (defined $pathname) {
 784                 # we got "branch:filename" or "branch:dir/"
 785                 # we could use git_get_type(branch:pathname), but:
 786                 # - it needs $git_dir
 787                 # - it does a git() call
 788                 # - the convention of terminating directories with a slash
 789                 #   makes it superfluous
 790                 # - embedding the action in the PATH_INFO would make it even
 791                 #   more superfluous
 792                 $pathname =~ s,^/+,,;
 793                 if (!$pathname || substr($pathname, -1) eq "/") {
 794                         $input_params{'action'} ||= "tree";
 795                         $pathname =~ s,/$,,;
 796                 } else {
 797                         # the default action depends on whether we had parent info
 798                         # or not
 799                         if ($parentrefname) {
 800                                 $input_params{'action'} ||= "blobdiff_plain";
 801                         } else {
 802                                 $input_params{'action'} ||= "blob_plain";
 803                         }
 804                 }
 805                 $input_params{'hash_base'} ||= $refname;
 806                 $input_params{'file_name'} ||= $pathname;
 807         } elsif (defined $refname) {
 808                 # we got "branch". In this case we have to choose if we have to
 809                 # set hash or hash_base.
 810                 #
 811                 # Most of the actions without a pathname only want hash to be
 812                 # set, except for the ones specified in @wants_base that want
 813                 # hash_base instead. It should also be noted that hand-crafted
 814                 # links having 'history' as an action and no pathname or hash
 815                 # set will fail, but that happens regardless of PATH_INFO.
 816                 $input_params{'action'} ||= "shortlog";
 817                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 818                         $input_params{'hash_base'} ||= $refname;
 819                 } else {
 820                         $input_params{'hash'} ||= $refname;
 821                 }
 822         }
 823
 824         # next, handle the 'parent' part, if present
 825         if (defined $parentrefname) {
 826                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 827                 # someproject/blobdiff/oldrev..newrev:/filename
 828                 if ($parentpathname) {
 829                         $parentpathname =~ s,^/+,,;
 830                         $parentpathname =~ s,/$,,;
 831                         $input_params{'file_parent'} ||= $parentpathname;
 832                 } else {
 833                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 834                 }
 835                 # we assume that hash_parent_base is wanted if a path was specified,
 836                 # or if the action wants hash_base instead of hash
 837                 if (defined $input_params{'file_parent'} ||
 838                         grep { $_ eq $input_params{'action'} } @wants_base) {
 839                         $input_params{'hash_parent_base'} ||= $parentrefname;
 840                 } else {
 841                         $input_params{'hash_parent'} ||= $parentrefname;
 842                 }
 843         }
 844
 845         # for the snapshot action, we allow URLs in the form
 846         # $project/snapshot/$hash.ext
 847         # where .ext determines the snapshot and gets removed from the
 848         # passed $refname to provide the $hash.
 849         #
 850         # To be able to tell that $refname includes the format extension, we
 851         # require the following two conditions to be satisfied:
 852         # - the hash input parameter MUST have been set from the $refname part
 853         #   of the URL (i.e. they must be equal)
 854         # - the snapshot format MUST NOT have been defined already (e.g. from
 855         #   CGI parameter sf)
 856         # It's also useless to try any matching unless $refname has a dot,
 857         # so we check for that too
 858         if (defined $input_params{'action'} &&
 859                 $input_params{'action'} eq 'snapshot' &&
 860                 defined $refname && index($refname, '.') != -1 &&
 861                 $refname eq $input_params{'hash'} &&
 862                 !defined $input_params{'snapshot_format'}) {
 863                 # We loop over the known snapshot formats, checking for
 864                 # extensions. Allowed extensions are both the defined suffix
 865                 # (which includes the initial dot already) and the snapshot
 866                 # format key itself, with a prepended dot
 867                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 868                         my $hash = $refname;
 869                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 870                                 next;
 871                         }
 872                         my $sfx = $1;
 873                         # a valid suffix was found, so set the snapshot format
 874                         # and reset the hash parameter
 875                         $input_params{'snapshot_format'} = $fmt;
 876                         $input_params{'hash'} = $hash;
 877                         # we also set the format suffix to the one requested
 878                         # in the URL: this way a request for e.g. .tgz returns
 879                         # a .tgz instead of a .tar.gz
 880                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 881                         last;
 882                 }
 883         }
 884 }
 885
 886 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 887      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 888      $searchtext, $search_regexp);
 889 sub evaluate_and_validate_params {
 890         our $action = $input_params{'action'};
 891         if (defined $action) {
 892                 if (!validate_action($action)) {
 893                         die_error(400, "Invalid action parameter");
 894                 }
 895         }
 896
 897         # parameters which are pathnames
 898         our $project = $input_params{'project'};
 899         if (defined $project) {
 900                 if (!validate_project($project)) {
 901                         undef $project;
 902                         die_error(404, "No such project");
 903                 }
 904         }
 905
 906         our $file_name = $input_params{'file_name'};
 907         if (defined $file_name) {
 908                 if (!validate_pathname($file_name)) {
 909                         die_error(400, "Invalid file parameter");
 910                 }
 911         }
 912
 913         our $file_parent = $input_params{'file_parent'};
 914         if (defined $file_parent) {
 915                 if (!validate_pathname($file_parent)) {
 916                         die_error(400, "Invalid file parent parameter");
 917                 }
 918         }
 919
 920         # parameters which are refnames
 921         our $hash = $input_params{'hash'};
 922         if (defined $hash) {
 923                 if (!validate_refname($hash)) {
 924                         die_error(400, "Invalid hash parameter");
 925                 }
 926         }
 927
 928         our $hash_parent = $input_params{'hash_parent'};
 929         if (defined $hash_parent) {
 930                 if (!validate_refname($hash_parent)) {
 931                         die_error(400, "Invalid hash parent parameter");
 932                 }
 933         }
 934
 935         our $hash_base = $input_params{'hash_base'};
 936         if (defined $hash_base) {
 937                 if (!validate_refname($hash_base)) {
 938                         die_error(400, "Invalid hash base parameter");
 939                 }
 940         }
 941
 942         our @extra_options = @{$input_params{'extra_options'}};
 943         # @extra_options is always defined, since it can only be (currently) set from
 944         # CGI, and $cgi->param() returns the empty array in array context if the param
 945         # is not set
 946         foreach my $opt (@extra_options) {
 947                 if (not exists $allowed_options{$opt}) {
 948                         die_error(400, "Invalid option parameter");
 949                 }
 950                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 951                         die_error(400, "Invalid option parameter for this action");
 952                 }
 953         }
 954
 955         our $hash_parent_base = $input_params{'hash_parent_base'};
 956         if (defined $hash_parent_base) {
 957                 if (!validate_refname($hash_parent_base)) {
 958                         die_error(400, "Invalid hash parent base parameter");
 959                 }
 960         }
 961
 962         # other parameters
 963         our $page = $input_params{'page'};
 964         if (defined $page) {
 965                 if ($page =~ m/[^0-9]/) {
 966                         die_error(400, "Invalid page parameter");
 967                 }
 968         }
 969
 970         our $searchtype = $input_params{'searchtype'};
 971         if (defined $searchtype) {
 972                 if ($searchtype =~ m/[^a-z]/) {
 973                         die_error(400, "Invalid searchtype parameter");
 974                 }
 975         }
 976
 977         our $search_use_regexp = $input_params{'search_use_regexp'};
 978
 979         our $searchtext = $input_params{'searchtext'};
 980         our $search_regexp;
 981         if (defined $searchtext) {
 982                 if (length($searchtext) < 2) {
 983                         die_error(403, "At least two characters are required for search parameter");
 984                 }
 985                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 986         }
 987 }
 988
 989 # path to the current git repository
 990 our $git_dir;
 991 sub evaluate_git_dir {
 992         our $git_dir = "$projectroot/$project" if $project;
 993 }
 994
 995 our (@snapshot_fmts, $git_avatar);
 996 sub configure_gitweb_features {
 997         # list of supported snapshot formats
 998         our @snapshot_fmts = gitweb_get_feature('snapshot');
 999         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1000
1001         # check that the avatar feature is set to a known provider name,
1002         # and for each provider check if the dependencies are satisfied.
1003         # if the provider name is invalid or the dependencies are not met,
1004         # reset $git_avatar to the empty string.
1005         our ($git_avatar) = gitweb_get_feature('avatar');
1006         if ($git_avatar eq 'gravatar') {
1007                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1008         } elsif ($git_avatar eq 'picon') {
1009                 # no dependencies
1010         } else {
1011                 $git_avatar = '';
1012         }
1013 }
1014
1015 # custom error handler: 'die <message>' is Internal Server Error
1016 sub handle_errors_html {
1017         my $msg = shift; # it is already HTML escaped
1018
1019         # to avoid infinite loop where error occurs in die_error,
1020         # change handler to default handler, disabling handle_errors_html
1021         set_message("Error occured when inside die_error:\n$msg");
1022
1023         # you cannot jump out of die_error when called as error handler;
1024         # the subroutine set via CGI::Carp::set_message is called _after_
1025         # HTTP headers are already written, so it cannot write them itself
1026         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1027 }
1028 set_message(\&handle_errors_html);
1029
1030 # dispatch
1031 sub dispatch {
1032         if (!defined $action) {
1033                 if (defined $hash) {
1034                         $action = git_get_type($hash);
1035                 } elsif (defined $hash_base && defined $file_name) {
1036                         $action = git_get_type("$hash_base:$file_name");
1037                 } elsif (defined $project) {
1038                         $action = 'summary';
1039                 } else {
1040                         $action = 'project_list';
1041                 }
1042         }
1043         if (!defined($actions{$action})) {
1044                 die_error(400, "Unknown action");
1045         }
1046         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1047             !$project) {
1048                 die_error(400, "Project needed");
1049         }
1050         $actions{$action}->();
1051 }
1052
1053 sub reset_timer {
1054         our $t0 = [Time::HiRes::gettimeofday()]
1055                 if defined $t0;
1056         our $number_of_git_cmds = 0;
1057 }
1058
1059 sub run_request {
1060         reset_timer();
1061
1062         evaluate_uri();
1063         evaluate_gitweb_config();
1064         check_loadavg();
1065
1066         # $projectroot and $projects_list might be set in gitweb config file
1067         $projects_list ||= $projectroot;
1068
1069         evaluate_query_params();
1070         evaluate_path_info();
1071         evaluate_and_validate_params();
1072         evaluate_git_dir();
1073
1074         configure_gitweb_features();
1075
1076         dispatch();
1077 }
1078
1079 our $is_last_request = sub { 1 };
1080 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1081 our $CGI = 'CGI';
1082 our $cgi;
1083 sub configure_as_fcgi {
1084         require CGI::Fast;
1085         our $CGI = 'CGI::Fast';
1086
1087         my $request_number = 0;
1088         # let each child service 100 requests
1089         our $is_last_request = sub { ++$request_number > 100 };
1090 }
1091 sub evaluate_argv {
1092         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1093         configure_as_fcgi()
1094                 if $script_name =~ /\.fcgi$/;
1095
1096         return unless (@ARGV);
1097
1098         require Getopt::Long;
1099         Getopt::Long::GetOptions(
1100                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1101                 'nproc|n=i' => sub {
1102                         my ($arg, $val) = @_;
1103                         return unless eval { require FCGI::ProcManager; 1; };
1104                         my $proc_manager = FCGI::ProcManager->new({
1105                                 n_processes => $val,
1106                         });
1107                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1108                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1109                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1110                 },
1111         );
1112 }
1113
1114 sub run {
1115         evaluate_argv();
1116         evaluate_git_version();
1117
1118         $pre_listen_hook->()
1119                 if $pre_listen_hook;
1120
1121  REQUEST:
1122         while ($cgi = $CGI->new()) {
1123                 $pre_dispatch_hook->()
1124                         if $pre_dispatch_hook;
1125
1126                 run_request();
1127
1128                 $post_dispatch_hook->()
1129                         if $post_dispatch_hook;
1130
1131                 last REQUEST if ($is_last_request->());
1132         }
1133
1134  DONE_GITWEB:
1135         1;
1136 }
1137
1138 run();
1139
1140 if (defined caller) {
1141         # wrapped in a subroutine processing requests,
1142         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1143         return;
1144 } else {
1145         # pure CGI script, serving single request
1146         exit;
1147 }
1148
1149 ## ======================================================================
1150 ## action links
1151
1152 # possible values of extra options
1153 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1154 # -replay => 1      - start from a current view (replay with modifications)
1155 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1156 sub href {
1157         my %params = @_;
1158         # default is to use -absolute url() i.e. $my_uri
1159         my $href = $params{-full} ? $my_url : $my_uri;
1160
1161         $params{'project'} = $project unless exists $params{'project'};
1162
1163         if ($params{-replay}) {
1164                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1165                         if (!exists $params{$name}) {
1166                                 $params{$name} = $input_params{$name};
1167                         }
1168                 }
1169         }
1170
1171         my $use_pathinfo = gitweb_check_feature('pathinfo');
1172         if (defined $params{'project'} &&
1173             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1174                 # try to put as many parameters as possible in PATH_INFO:
1175                 #   - project name
1176                 #   - action
1177                 #   - hash_parent or hash_parent_base:/file_parent
1178                 #   - hash or hash_base:/filename
1179                 #   - the snapshot_format as an appropriate suffix
1180
1181                 # When the script is the root DirectoryIndex for the domain,
1182                 # $href here would be something like http://gitweb.example.com/
1183                 # Thus, we strip any trailing / from $href, to spare us double
1184                 # slashes in the final URL
1185                 $href =~ s,/$,,;
1186
1187                 # Then add the project name, if present
1188                 $href .= "/".esc_url($params{'project'});
1189                 delete $params{'project'};
1190
1191                 # since we destructively absorb parameters, we keep this
1192                 # boolean that remembers if we're handling a snapshot
1193                 my $is_snapshot = $params{'action'} eq 'snapshot';
1194
1195                 # Summary just uses the project path URL, any other action is
1196                 # added to the URL
1197                 if (defined $params{'action'}) {
1198                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1199                         delete $params{'action'};
1200                 }
1201
1202                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1203                 # stripping nonexistent or useless pieces
1204                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1205                         || $params{'hash_parent'} || $params{'hash'});
1206                 if (defined $params{'hash_base'}) {
1207                         if (defined $params{'hash_parent_base'}) {
1208                                 $href .= esc_url($params{'hash_parent_base'});
1209                                 # skip the file_parent if it's the same as the file_name
1210                                 if (defined $params{'file_parent'}) {
1211                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1212                                                 delete $params{'file_parent'};
1213                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1214                                                 $href .= ":/".esc_url($params{'file_parent'});
1215                                                 delete $params{'file_parent'};
1216                                         }
1217                                 }
1218                                 $href .= "..";
1219                                 delete $params{'hash_parent'};
1220                                 delete $params{'hash_parent_base'};
1221                         } elsif (defined $params{'hash_parent'}) {
1222                                 $href .= esc_url($params{'hash_parent'}). "..";
1223                                 delete $params{'hash_parent'};
1224                         }
1225
1226                         $href .= esc_url($params{'hash_base'});
1227                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1228                                 $href .= ":/".esc_url($params{'file_name'});
1229                                 delete $params{'file_name'};
1230                         }
1231                         delete $params{'hash'};
1232                         delete $params{'hash_base'};
1233                 } elsif (defined $params{'hash'}) {
1234                         $href .= esc_url($params{'hash'});
1235                         delete $params{'hash'};
1236                 }
1237
1238                 # If the action was a snapshot, we can absorb the
1239                 # snapshot_format parameter too
1240                 if ($is_snapshot) {
1241                         my $fmt = $params{'snapshot_format'};
1242                         # snapshot_format should always be defined when href()
1243                         # is called, but just in case some code forgets, we
1244                         # fall back to the default
1245                         $fmt ||= $snapshot_fmts[0];
1246                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1247                         delete $params{'snapshot_format'};
1248                 }
1249         }
1250
1251         # now encode the parameters explicitly
1252         my @result = ();
1253         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1254                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1255                 if (defined $params{$name}) {
1256                         if (ref($params{$name}) eq "ARRAY") {
1257                                 foreach my $par (@{$params{$name}}) {
1258                                         push @result, $symbol . "=" . esc_param($par);
1259                                 }
1260                         } else {
1261                                 push @result, $symbol . "=" . esc_param($params{$name});
1262                         }
1263                 }
1264         }
1265         $href .= "?" . join(';', @result) if scalar @result;
1266
1267         return $href;
1268 }
1269
1270
1271 ## ======================================================================
1272 ## validation, quoting/unquoting and escaping
1273
1274 sub validate_action {
1275         my $input = shift || return undef;
1276         return undef unless exists $actions{$input};
1277         return $input;
1278 }
1279
1280 sub validate_project {
1281         my $input = shift || return undef;
1282         if (!validate_pathname($input) ||
1283                 !(-d "$projectroot/$input") ||
1284                 !check_export_ok("$projectroot/$input") ||
1285                 ($strict_export && !project_in_list($input))) {
1286                 return undef;
1287         } else {
1288                 return $input;
1289         }
1290 }
1291
1292 sub validate_pathname {
1293         my $input = shift || return undef;
1294
1295         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1296         # at the beginning, at the end, and between slashes.
1297         # also this catches doubled slashes
1298         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1299                 return undef;
1300         }
1301         # no null characters
1302         if ($input =~ m!\0!) {
1303                 return undef;
1304         }
1305         return $input;
1306 }
1307
1308 sub validate_refname {
1309         my $input = shift || return undef;
1310
1311         # textual hashes are O.K.
1312         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1313                 return $input;
1314         }
1315         # it must be correct pathname
1316         $input = validate_pathname($input)
1317                 or return undef;
1318         # restrictions on ref name according to git-check-ref-format
1319         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1320                 return undef;
1321         }
1322         return $input;
1323 }
1324
1325 # decode sequences of octets in utf8 into Perl's internal form,
1326 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1327 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1328 sub to_utf8 {
1329         my $str = shift;
1330         return undef unless defined $str;
1331         if (utf8::valid($str)) {
1332                 utf8::decode($str);
1333                 return $str;
1334         } else {
1335                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1336         }
1337 }
1338
1339 # quote unsafe chars, but keep the slash, even when it's not
1340 # correct, but quoted slashes look too horrible in bookmarks
1341 sub esc_param {
1342         my $str = shift;
1343         return undef unless defined $str;
1344         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1345         $str =~ s/ /\+/g;
1346         return $str;
1347 }
1348
1349 # quote unsafe chars in whole URL, so some characters cannot be quoted
1350 sub esc_url {
1351         my $str = shift;
1352         return undef unless defined $str;
1353         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1354         $str =~ s/ /\+/g;
1355         return $str;
1356 }
1357
1358 # replace invalid utf8 character with SUBSTITUTION sequence
1359 sub esc_html {
1360         my $str = shift;
1361         my %opts = @_;
1362
1363         return undef unless defined $str;
1364
1365         $str = to_utf8($str);
1366         $str = $cgi->escapeHTML($str);
1367         if ($opts{'-nbsp'}) {
1368                 $str =~ s/ /&nbsp;/g;
1369         }
1370         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1371         return $str;
1372 }
1373
1374 # quote control characters and escape filename to HTML
1375 sub esc_path {
1376         my $str = shift;
1377         my %opts = @_;
1378
1379         return undef unless defined $str;
1380
1381         $str = to_utf8($str);
1382         $str = $cgi->escapeHTML($str);
1383         if ($opts{'-nbsp'}) {
1384                 $str =~ s/ /&nbsp;/g;
1385         }
1386         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1387         return $str;
1388 }
1389
1390 # Make control characters "printable", using character escape codes (CEC)
1391 sub quot_cec {
1392         my $cntrl = shift;
1393         my %opts = @_;
1394         my %es = ( # character escape codes, aka escape sequences
1395                 "\t" => '\t',   # tab            (HT)
1396                 "\n" => '\n',   # line feed      (LF)
1397                 "\r" => '\r',   # carrige return (CR)
1398                 "\f" => '\f',   # form feed      (FF)
1399                 "\b" => '\b',   # backspace      (BS)
1400                 "\a" => '\a',   # alarm (bell)   (BEL)
1401                 "\e" => '\e',   # escape         (ESC)
1402                 "\013" => '\v', # vertical tab   (VT)
1403                 "\000" => '\0', # nul character  (NUL)
1404         );
1405         my $chr = ( (exists $es{$cntrl})
1406                     ? $es{$cntrl}
1407                     : sprintf('\%2x', ord($cntrl)) );
1408         if ($opts{-nohtml}) {
1409                 return $chr;
1410         } else {
1411                 return "<span class=\"cntrl\">$chr</span>";
1412         }
1413 }
1414
1415 # Alternatively use unicode control pictures codepoints,
1416 # Unicode "printable representation" (PR)
1417 sub quot_upr {
1418         my $cntrl = shift;
1419         my %opts = @_;
1420
1421         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1422         if ($opts{-nohtml}) {
1423                 return $chr;
1424         } else {
1425                 return "<span class=\"cntrl\">$chr</span>";
1426         }
1427 }
1428
1429 # git may return quoted and escaped filenames
1430 sub unquote {
1431         my $str = shift;
1432
1433         sub unq {
1434                 my $seq = shift;
1435                 my %es = ( # character escape codes, aka escape sequences
1436                         't' => "\t",   # tab            (HT, TAB)
1437                         'n' => "\n",   # newline        (NL)
1438                         'r' => "\r",   # return         (CR)
1439                         'f' => "\f",   # form feed      (FF)
1440                         'b' => "\b",   # backspace      (BS)
1441                         'a' => "\a",   # alarm (bell)   (BEL)
1442                         'e' => "\e",   # escape         (ESC)
1443                         'v' => "\013", # vertical tab   (VT)
1444                 );
1445
1446                 if ($seq =~ m/^[0-7]{1,3}$/) {
1447                         # octal char sequence
1448                         return chr(oct($seq));
1449                 } elsif (exists $es{$seq}) {
1450                         # C escape sequence, aka character escape code
1451                         return $es{$seq};
1452                 }
1453                 # quoted ordinary character
1454                 return $seq;
1455         }
1456
1457         if ($str =~ m/^"(.*)"$/) {
1458                 # needs unquoting
1459                 $str = $1;
1460                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1461         }
1462         return $str;
1463 }
1464
1465 # escape tabs (convert tabs to spaces)
1466 sub untabify {
1467         my $line = shift;
1468
1469         while ((my $pos = index($line, "\t")) != -1) {
1470                 if (my $count = (8 - ($pos % 8))) {
1471                         my $spaces = ' ' x $count;
1472                         $line =~ s/\t/$spaces/;
1473                 }
1474         }
1475
1476         return $line;
1477 }
1478
1479 sub project_in_list {
1480         my $project = shift;
1481         my @list = git_get_projects_list();
1482         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1483 }
1484
1485 ## ----------------------------------------------------------------------
1486 ## HTML aware string manipulation
1487
1488 # Try to chop given string on a word boundary between position
1489 # $len and $len+$add_len. If there is no word boundary there,
1490 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1491 # (marking chopped part) would be longer than given string.
1492 sub chop_str {
1493         my $str = shift;
1494         my $len = shift;
1495         my $add_len = shift || 10;
1496         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1497
1498         # Make sure perl knows it is utf8 encoded so we don't
1499         # cut in the middle of a utf8 multibyte char.
1500         $str = to_utf8($str);
1501
1502         # allow only $len chars, but don't cut a word if it would fit in $add_len
1503         # if it doesn't fit, cut it if it's still longer than the dots we would add
1504         # remove chopped character entities entirely
1505
1506         # when chopping in the middle, distribute $len into left and right part
1507         # return early if chopping wouldn't make string shorter
1508         if ($where eq 'center') {
1509                 return $str if ($len + 5 >= length($str)); # filler is length 5
1510                 $len = int($len/2);
1511         } else {
1512                 return $str if ($len + 4 >= length($str)); # filler is length 4
1513         }
1514
1515         # regexps: ending and beginning with word part up to $add_len
1516         my $endre = qr/.{$len}\w{0,$add_len}/;
1517         my $begre = qr/\w{0,$add_len}.{$len}/;
1518
1519         if ($where eq 'left') {
1520                 $str =~ m/^(.*?)($begre)$/;
1521                 my ($lead, $body) = ($1, $2);
1522                 if (length($lead) > 4) {
1523                         $lead = " ...";
1524                 }
1525                 return "$lead$body";
1526
1527         } elsif ($where eq 'center') {
1528                 $str =~ m/^($endre)(.*)$/;
1529                 my ($left, $str)  = ($1, $2);
1530                 $str =~ m/^(.*?)($begre)$/;
1531                 my ($mid, $right) = ($1, $2);
1532                 if (length($mid) > 5) {
1533                         $mid = " ... ";
1534                 }
1535                 return "$left$mid$right";
1536
1537         } else {
1538                 $str =~ m/^($endre)(.*)$/;
1539                 my $body = $1;
1540                 my $tail = $2;
1541                 if (length($tail) > 4) {
1542                         $tail = "... ";
1543                 }
1544                 return "$body$tail";
1545         }
1546 }
1547
1548 # takes the same arguments as chop_str, but also wraps a <span> around the
1549 # result with a title attribute if it does get chopped. Additionally, the
1550 # string is HTML-escaped.
1551 sub chop_and_escape_str {
1552         my ($str) = @_;
1553
1554         my $chopped = chop_str(@_);
1555         if ($chopped eq $str) {
1556                 return esc_html($chopped);
1557         } else {
1558                 $str =~ s/[[:cntrl:]]/?/g;
1559                 return $cgi->span({-title=>$str}, esc_html($chopped));
1560         }
1561 }
1562
1563 ## ----------------------------------------------------------------------
1564 ## functions returning short strings
1565
1566 # CSS class for given age value (in seconds)
1567 sub age_class {
1568         my $age = shift;
1569
1570         if (!defined $age) {
1571                 return "noage";
1572         } elsif ($age < 60*60*2) {
1573                 return "age0";
1574         } elsif ($age < 60*60*24*2) {
1575                 return "age1";
1576         } else {
1577                 return "age2";
1578         }
1579 }
1580
1581 # convert age in seconds to "nn units ago" string
1582 sub age_string {
1583         my $age = shift;
1584         my $age_str;
1585
1586         if ($age > 60*60*24*365*2) {
1587                 $age_str = (int $age/60/60/24/365);
1588                 $age_str .= " years ago";
1589         } elsif ($age > 60*60*24*(365/12)*2) {
1590                 $age_str = int $age/60/60/24/(365/12);
1591                 $age_str .= " months ago";
1592         } elsif ($age > 60*60*24*7*2) {
1593                 $age_str = int $age/60/60/24/7;
1594                 $age_str .= " weeks ago";
1595         } elsif ($age > 60*60*24*2) {
1596                 $age_str = int $age/60/60/24;
1597                 $age_str .= " days ago";
1598         } elsif ($age > 60*60*2) {
1599                 $age_str = int $age/60/60;
1600                 $age_str .= " hours ago";
1601         } elsif ($age > 60*2) {
1602                 $age_str = int $age/60;
1603                 $age_str .= " min ago";
1604         } elsif ($age > 2) {
1605                 $age_str = int $age;
1606                 $age_str .= " sec ago";
1607         } else {
1608                 $age_str .= " right now";
1609         }
1610         return $age_str;
1611 }
1612
1613 use constant {
1614         S_IFINVALID => 0030000,
1615         S_IFGITLINK => 0160000,
1616 };
1617
1618 # submodule/subproject, a commit object reference
1619 sub S_ISGITLINK {
1620         my $mode = shift;
1621
1622         return (($mode & S_IFMT) == S_IFGITLINK)
1623 }
1624
1625 # convert file mode in octal to symbolic file mode string
1626 sub mode_str {
1627         my $mode = oct shift;
1628
1629         if (S_ISGITLINK($mode)) {
1630                 return 'm---------';
1631         } elsif (S_ISDIR($mode & S_IFMT)) {
1632                 return 'drwxr-xr-x';
1633         } elsif (S_ISLNK($mode)) {
1634                 return 'lrwxrwxrwx';
1635         } elsif (S_ISREG($mode)) {
1636                 # git cares only about the executable bit
1637                 if ($mode & S_IXUSR) {
1638                         return '-rwxr-xr-x';
1639                 } else {
1640                         return '-rw-r--r--';
1641                 };
1642         } else {
1643                 return '----------';
1644         }
1645 }
1646
1647 # convert file mode in octal to file type string
1648 sub file_type {
1649         my $mode = shift;
1650
1651         if ($mode !~ m/^[0-7]+$/) {
1652                 return $mode;
1653         } else {
1654                 $mode = oct $mode;
1655         }
1656
1657         if (S_ISGITLINK($mode)) {
1658                 return "submodule";
1659         } elsif (S_ISDIR($mode & S_IFMT)) {
1660                 return "directory";
1661         } elsif (S_ISLNK($mode)) {
1662                 return "symlink";
1663         } elsif (S_ISREG($mode)) {
1664                 return "file";
1665         } else {
1666                 return "unknown";
1667         }
1668 }
1669
1670 # convert file mode in octal to file type description string
1671 sub file_type_long {
1672         my $mode = shift;
1673
1674         if ($mode !~ m/^[0-7]+$/) {
1675                 return $mode;
1676         } else {
1677                 $mode = oct $mode;
1678         }
1679
1680         if (S_ISGITLINK($mode)) {
1681                 return "submodule";
1682         } elsif (S_ISDIR($mode & S_IFMT)) {
1683                 return "directory";
1684         } elsif (S_ISLNK($mode)) {
1685                 return "symlink";
1686         } elsif (S_ISREG($mode)) {
1687                 if ($mode & S_IXUSR) {
1688                         return "executable";
1689                 } else {
1690                         return "file";
1691                 };
1692         } else {
1693                 return "unknown";
1694         }
1695 }
1696
1697
1698 ## ----------------------------------------------------------------------
1699 ## functions returning short HTML fragments, or transforming HTML fragments
1700 ## which don't belong to other sections
1701
1702 # format line of commit message.
1703 sub format_log_line_html {
1704         my $line = shift;
1705
1706         $line = esc_html($line, -nbsp=>1);
1707         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1708                 $cgi->a({-href => href(action=>"object", hash=>$1),
1709                                         -class => "text"}, $1);
1710         }eg;
1711
1712         return $line;
1713 }
1714
1715 # format marker of refs pointing to given object
1716
1717 # the destination action is chosen based on object type and current context:
1718 # - for annotated tags, we choose the tag view unless it's the current view
1719 #   already, in which case we go to shortlog view
1720 # - for other refs, we keep the current view if we're in history, shortlog or
1721 #   log view, and select shortlog otherwise
1722 sub format_ref_marker {
1723         my ($refs, $id) = @_;
1724         my $markers = '';
1725
1726         if (defined $refs->{$id}) {
1727                 foreach my $ref (@{$refs->{$id}}) {
1728                         # this code exploits the fact that non-lightweight tags are the
1729                         # only indirect objects, and that they are the only objects for which
1730                         # we want to use tag instead of shortlog as action
1731                         my ($type, $name) = qw();
1732                         my $indirect = ($ref =~ s/\^\{\}$//);
1733                         # e.g. tags/v2.6.11 or heads/next
1734                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1735                                 $type = $1;
1736                                 $name = $2;
1737                         } else {
1738                                 $type = "ref";
1739                                 $name = $ref;
1740                         }
1741
1742                         my $class = $type;
1743                         $class .= " indirect" if $indirect;
1744
1745                         my $dest_action = "shortlog";
1746
1747                         if ($indirect) {
1748                                 $dest_action = "tag" unless $action eq "tag";
1749                         } elsif ($action =~ /^(history|(short)?log)$/) {
1750                                 $dest_action = $action;
1751                         }
1752
1753                         my $dest = "";
1754                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1755                         $dest .= $ref;
1756
1757                         my $link = $cgi->a({
1758                                 -href => href(
1759                                         action=>$dest_action,
1760                                         hash=>$dest
1761                                 )}, $name);
1762
1763                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1764                                 $link . "</span>";
1765                 }
1766         }
1767
1768         if ($markers) {
1769                 return ' <span class="refs">'. $markers . '</span>';
1770         } else {
1771                 return "";
1772         }
1773 }
1774
1775 # format, perhaps shortened and with markers, title line
1776 sub format_subject_html {
1777         my ($long, $short, $href, $extra) = @_;
1778         $extra = '' unless defined($extra);
1779
1780         if (length($short) < length($long)) {
1781                 $long =~ s/[[:cntrl:]]/?/g;
1782                 return $cgi->a({-href => $href, -class => "list subject",
1783                                 -title => to_utf8($long)},
1784                        esc_html($short)) . $extra;
1785         } else {
1786                 return $cgi->a({-href => $href, -class => "list subject"},
1787                        esc_html($long)) . $extra;
1788         }
1789 }
1790
1791 # Rather than recomputing the url for an email multiple times, we cache it
1792 # after the first hit. This gives a visible benefit in views where the avatar
1793 # for the same email is used repeatedly (e.g. shortlog).
1794 # The cache is shared by all avatar engines (currently gravatar only), which
1795 # are free to use it as preferred. Since only one avatar engine is used for any
1796 # given page, there's no risk for cache conflicts.
1797 our %avatar_cache = ();
1798
1799 # Compute the picon url for a given email, by using the picon search service over at
1800 # http://www.cs.indiana.edu/picons/search.html
1801 sub picon_url {
1802         my $email = lc shift;
1803         if (!$avatar_cache{$email}) {
1804                 my ($user, $domain) = split('@', $email);
1805                 $avatar_cache{$email} =
1806                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1807                         "$domain/$user/" .
1808                         "users+domains+unknown/up/single";
1809         }
1810         return $avatar_cache{$email};
1811 }
1812
1813 # Compute the gravatar url for a given email, if it's not in the cache already.
1814 # Gravatar stores only the part of the URL before the size, since that's the
1815 # one computationally more expensive. This also allows reuse of the cache for
1816 # different sizes (for this particular engine).
1817 sub gravatar_url {
1818         my $email = lc shift;
1819         my $size = shift;
1820         $avatar_cache{$email} ||=
1821                 "http://www.gravatar.com/avatar/" .
1822                         Digest::MD5::md5_hex($email) . "?s=";
1823         return $avatar_cache{$email} . $size;
1824 }
1825
1826 # Insert an avatar for the given $email at the given $size if the feature
1827 # is enabled.
1828 sub git_get_avatar {
1829         my ($email, %opts) = @_;
1830         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1831         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1832         $opts{-size} ||= 'default';
1833         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1834         my $url = "";
1835         if ($git_avatar eq 'gravatar') {
1836                 $url = gravatar_url($email, $size);
1837         } elsif ($git_avatar eq 'picon') {
1838                 $url = picon_url($email);
1839         }
1840         # Other providers can be added by extending the if chain, defining $url
1841         # as needed. If no variant puts something in $url, we assume avatars
1842         # are completely disabled/unavailable.
1843         if ($url) {
1844                 return $pre_white .
1845                        "<img width=\"$size\" " .
1846                             "class=\"avatar\" " .
1847                             "src=\"$url\" " .
1848                             "alt=\"\" " .
1849                        "/>" . $post_white;
1850         } else {
1851                 return "";
1852         }
1853 }
1854
1855 sub format_search_author {
1856         my ($author, $searchtype, $displaytext) = @_;
1857         my $have_search = gitweb_check_feature('search');
1858
1859         if ($have_search) {
1860                 my $performed = "";
1861                 if ($searchtype eq 'author') {
1862                         $performed = "authored";
1863                 } elsif ($searchtype eq 'committer') {
1864                         $performed = "committed";
1865                 }
1866
1867                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1868                                 searchtext=>$author,
1869                                 searchtype=>$searchtype), class=>"list",
1870                                 title=>"Search for commits $performed by $author"},
1871                                 $displaytext);
1872
1873         } else {
1874                 return $displaytext;
1875         }
1876 }
1877
1878 # format the author name of the given commit with the given tag
1879 # the author name is chopped and escaped according to the other
1880 # optional parameters (see chop_str).
1881 sub format_author_html {
1882         my $tag = shift;
1883         my $co = shift;
1884         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1885         return "<$tag class=\"author\">" .
1886                format_search_author($co->{'author_name'}, "author",
1887                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1888                        $author) .
1889                "</$tag>";
1890 }
1891
1892 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1893 sub format_git_diff_header_line {
1894         my $line = shift;
1895         my $diffinfo = shift;
1896         my ($from, $to) = @_;
1897
1898         if ($diffinfo->{'nparents'}) {
1899                 # combined diff
1900                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1901                 if ($to->{'href'}) {
1902                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1903                                          esc_path($to->{'file'}));
1904                 } else { # file was deleted (no href)
1905                         $line .= esc_path($to->{'file'});
1906                 }
1907         } else {
1908                 # "ordinary" diff
1909                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1910                 if ($from->{'href'}) {
1911                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1912                                          'a/' . esc_path($from->{'file'}));
1913                 } else { # file was added (no href)
1914                         $line .= 'a/' . esc_path($from->{'file'});
1915                 }
1916                 $line .= ' ';
1917                 if ($to->{'href'}) {
1918                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1919                                          'b/' . esc_path($to->{'file'}));
1920                 } else { # file was deleted
1921                         $line .= 'b/' . esc_path($to->{'file'});
1922                 }
1923         }
1924
1925         return "<div class=\"diff header\">$line</div>\n";
1926 }
1927
1928 # format extended diff header line, before patch itself
1929 sub format_extended_diff_header_line {
1930         my $line = shift;
1931         my $diffinfo = shift;
1932         my ($from, $to) = @_;
1933
1934         # match <path>
1935         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1936                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1937                                        esc_path($from->{'file'}));
1938         }
1939         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1940                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1941                                  esc_path($to->{'file'}));
1942         }
1943         # match single <mode>
1944         if ($line =~ m/\s(\d{6})$/) {
1945                 $line .= '<span class="info"> (' .
1946                          file_type_long($1) .
1947                          ')</span>';
1948         }
1949         # match <hash>
1950         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1951                 # can match only for combined diff
1952                 $line = 'index ';
1953                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1954                         if ($from->{'href'}[$i]) {
1955                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1956                                                   -class=>"hash"},
1957                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1958                         } else {
1959                                 $line .= '0' x 7;
1960                         }
1961                         # separator
1962                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1963                 }
1964                 $line .= '..';
1965                 if ($to->{'href'}) {
1966                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1967                                          substr($diffinfo->{'to_id'},0,7));
1968                 } else {
1969                         $line .= '0' x 7;
1970                 }
1971
1972         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1973                 # can match only for ordinary diff
1974                 my ($from_link, $to_link);
1975                 if ($from->{'href'}) {
1976                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1977                                              substr($diffinfo->{'from_id'},0,7));
1978                 } else {
1979                         $from_link = '0' x 7;
1980                 }
1981                 if ($to->{'href'}) {
1982                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1983                                            substr($diffinfo->{'to_id'},0,7));
1984                 } else {
1985                         $to_link = '0' x 7;
1986                 }
1987                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1988                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1989         }
1990
1991         return $line . "<br/>\n";
1992 }
1993
1994 # format from-file/to-file diff header
1995 sub format_diff_from_to_header {
1996         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1997         my $line;
1998         my $result = '';
1999
2000         $line = $from_line;
2001         #assert($line =~ m/^---/) if DEBUG;
2002         # no extra formatting for "^--- /dev/null"
2003         if (! $diffinfo->{'nparents'}) {
2004                 # ordinary (single parent) diff
2005                 if ($line =~ m!^--- "?a/!) {
2006                         if ($from->{'href'}) {
2007                                 $line = '--- a/' .
2008                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2009                                                 esc_path($from->{'file'}));
2010                         } else {
2011                                 $line = '--- a/' .
2012                                         esc_path($from->{'file'});
2013                         }
2014                 }
2015                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2016
2017         } else {
2018                 # combined diff (merge commit)
2019                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2020                         if ($from->{'href'}[$i]) {
2021                                 $line = '--- ' .
2022                                         $cgi->a({-href=>href(action=>"blobdiff",
2023                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2024                                                              hash_parent_base=>$parents[$i],
2025                                                              file_parent=>$from->{'file'}[$i],
2026                                                              hash=>$diffinfo->{'to_id'},
2027                                                              hash_base=>$hash,
2028                                                              file_name=>$to->{'file'}),
2029                                                  -class=>"path",
2030                                                  -title=>"diff" . ($i+1)},
2031                                                 $i+1) .
2032                                         '/' .
2033                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2034                                                 esc_path($from->{'file'}[$i]));
2035                         } else {
2036                                 $line = '--- /dev/null';
2037                         }
2038                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2039                 }
2040         }
2041
2042         $line = $to_line;
2043         #assert($line =~ m/^\+\+\+/) if DEBUG;
2044         # no extra formatting for "^+++ /dev/null"
2045         if ($line =~ m!^\+\+\+ "?b/!) {
2046                 if ($to->{'href'}) {
2047                         $line = '+++ b/' .
2048                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2049                                         esc_path($to->{'file'}));
2050                 } else {
2051                         $line = '+++ b/' .
2052                                 esc_path($to->{'file'});
2053                 }
2054         }
2055         $result .= qq!<div class="diff to_file">$line</div>\n!;
2056
2057         return $result;
2058 }
2059
2060 # create note for patch simplified by combined diff
2061 sub format_diff_cc_simplified {
2062         my ($diffinfo, @parents) = @_;
2063         my $result = '';
2064
2065         $result .= "<div class=\"diff header\">" .
2066                    "diff --cc ";
2067         if (!is_deleted($diffinfo)) {
2068                 $result .= $cgi->a({-href => href(action=>"blob",
2069                                                   hash_base=>$hash,
2070                                                   hash=>$diffinfo->{'to_id'},
2071                                                   file_name=>$diffinfo->{'to_file'}),
2072                                     -class => "path"},
2073                                    esc_path($diffinfo->{'to_file'}));
2074         } else {
2075                 $result .= esc_path($diffinfo->{'to_file'});
2076         }
2077         $result .= "</div>\n" . # class="diff header"
2078                    "<div class=\"diff nodifferences\">" .
2079                    "Simple merge" .
2080                    "</div>\n"; # class="diff nodifferences"
2081
2082         return $result;
2083 }
2084
2085 # format patch (diff) line (not to be used for diff headers)
2086 sub format_diff_line {
2087         my $line = shift;
2088         my ($from, $to) = @_;
2089         my $diff_class = "";
2090
2091         chomp $line;
2092
2093         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2094                 # combined diff
2095                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2096                 if ($line =~ m/^\@{3}/) {
2097                         $diff_class = " chunk_header";
2098                 } elsif ($line =~ m/^\\/) {
2099                         $diff_class = " incomplete";
2100                 } elsif ($prefix =~ tr/+/+/) {
2101                         $diff_class = " add";
2102                 } elsif ($prefix =~ tr/-/-/) {
2103                         $diff_class = " rem";
2104                 }
2105         } else {
2106                 # assume ordinary diff
2107                 my $char = substr($line, 0, 1);
2108                 if ($char eq '+') {
2109                         $diff_class = " add";
2110                 } elsif ($char eq '-') {
2111                         $diff_class = " rem";
2112                 } elsif ($char eq '@') {
2113                         $diff_class = " chunk_header";
2114                 } elsif ($char eq "\\") {
2115                         $diff_class = " incomplete";
2116                 }
2117         }
2118         $line = untabify($line);
2119         if ($from && $to && $line =~ m/^\@{2} /) {
2120                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2121                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2122
2123                 $from_lines = 0 unless defined $from_lines;
2124                 $to_lines   = 0 unless defined $to_lines;
2125
2126                 if ($from->{'href'}) {
2127                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2128                                              -class=>"list"}, $from_text);
2129                 }
2130                 if ($to->{'href'}) {
2131                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2132                                              -class=>"list"}, $to_text);
2133                 }
2134                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2135                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2136                 return "<div class=\"diff$diff_class\">$line</div>\n";
2137         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2138                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2139                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2140
2141                 @from_text = split(' ', $ranges);
2142                 for (my $i = 0; $i < @from_text; ++$i) {
2143                         ($from_start[$i], $from_nlines[$i]) =
2144                                 (split(',', substr($from_text[$i], 1)), 0);
2145                 }
2146
2147                 $to_text   = pop @from_text;
2148                 $to_start  = pop @from_start;
2149                 $to_nlines = pop @from_nlines;
2150
2151                 $line = "<span class=\"chunk_info\">$prefix ";
2152                 for (my $i = 0; $i < @from_text; ++$i) {
2153                         if ($from->{'href'}[$i]) {
2154                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2155                                                   -class=>"list"}, $from_text[$i]);
2156                         } else {
2157                                 $line .= $from_text[$i];
2158                         }
2159                         $line .= " ";
2160                 }
2161                 if ($to->{'href'}) {
2162                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2163                                           -class=>"list"}, $to_text);
2164                 } else {
2165                         $line .= $to_text;
2166                 }
2167                 $line .= " $prefix</span>" .
2168                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2169                 return "<div class=\"diff$diff_class\">$line</div>\n";
2170         }
2171         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2172 }
2173
2174 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2175 # linked.  Pass the hash of the tree/commit to snapshot.
2176 sub format_snapshot_links {
2177         my ($hash) = @_;
2178         my $num_fmts = @snapshot_fmts;
2179         if ($num_fmts > 1) {
2180                 # A parenthesized list of links bearing format names.
2181                 # e.g. "snapshot (_tar.gz_ _zip_)"
2182                 return "snapshot (" . join(' ', map
2183                         $cgi->a({
2184                                 -href => href(
2185                                         action=>"snapshot",
2186                                         hash=>$hash,
2187                                         snapshot_format=>$_
2188                                 )
2189                         }, $known_snapshot_formats{$_}{'display'})
2190                 , @snapshot_fmts) . ")";
2191         } elsif ($num_fmts == 1) {
2192                 # A single "snapshot" link whose tooltip bears the format name.
2193                 # i.e. "_snapshot_"
2194                 my ($fmt) = @snapshot_fmts;
2195                 return
2196                         $cgi->a({
2197                                 -href => href(
2198                                         action=>"snapshot",
2199                                         hash=>$hash,
2200                                         snapshot_format=>$fmt
2201                                 ),
2202                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2203                         }, "snapshot");
2204         } else { # $num_fmts == 0
2205                 return undef;
2206         }
2207 }
2208
2209 ## ......................................................................
2210 ## functions returning values to be passed, perhaps after some
2211 ## transformation, to other functions; e.g. returning arguments to href()
2212
2213 # returns hash to be passed to href to generate gitweb URL
2214 # in -title key it returns description of link
2215 sub get_feed_info {
2216         my $format = shift || 'Atom';
2217         my %res = (action => lc($format));
2218
2219         # feed links are possible only for project views
2220         return unless (defined $project);
2221         # some views should link to OPML, or to generic project feed,
2222         # or don't have specific feed yet (so they should use generic)
2223         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2224
2225         my $branch;
2226         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2227         # from tag links; this also makes possible to detect branch links
2228         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2229             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2230                 $branch = $1;
2231         }
2232         # find log type for feed description (title)
2233         my $type = 'log';
2234         if (defined $file_name) {
2235                 $type  = "history of $file_name";
2236                 $type .= "/" if ($action eq 'tree');
2237                 $type .= " on '$branch'" if (defined $branch);
2238         } else {
2239                 $type = "log of $branch" if (defined $branch);
2240         }
2241
2242         $res{-title} = $type;
2243         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2244         $res{'file_name'} = $file_name;
2245
2246         return %res;
2247 }
2248
2249 ## ----------------------------------------------------------------------
2250 ## git utility subroutines, invoking git commands
2251
2252 # returns path to the core git executable and the --git-dir parameter as list
2253 sub git_cmd {
2254         $number_of_git_cmds++;
2255         return $GIT, '--git-dir='.$git_dir;
2256 }
2257
2258 # quote the given arguments for passing them to the shell
2259 # quote_command("command", "arg 1", "arg with ' and ! characters")
2260 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2261 # Try to avoid using this function wherever possible.
2262 sub quote_command {
2263         return join(' ',
2264                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2265 }
2266
2267 # get HEAD ref of given project as hash
2268 sub git_get_head_hash {
2269         return git_get_full_hash(shift, 'HEAD');
2270 }
2271
2272 sub git_get_full_hash {
2273         return git_get_hash(@_);
2274 }
2275
2276 sub git_get_short_hash {
2277         return git_get_hash(@_, '--short=7');
2278 }
2279
2280 sub git_get_hash {
2281         my ($project, $hash, @options) = @_;
2282         my $o_git_dir = $git_dir;
2283         my $retval = undef;
2284         $git_dir = "$projectroot/$project";
2285         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2286             '--verify', '-q', @options, $hash) {
2287                 $retval = <$fd>;
2288                 chomp $retval if defined $retval;
2289                 close $fd;
2290         }
2291         if (defined $o_git_dir) {
2292                 $git_dir = $o_git_dir;
2293         }
2294         return $retval;
2295 }
2296
2297 # get type of given object
2298 sub git_get_type {
2299         my $hash = shift;
2300
2301         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2302         my $type = <$fd>;
2303         close $fd or return;
2304         chomp $type;
2305         return $type;
2306 }
2307
2308 # repository configuration
2309 our $config_file = '';
2310 our %config;
2311
2312 # store multiple values for single key as anonymous array reference
2313 # single values stored directly in the hash, not as [ <value> ]
2314 sub hash_set_multi {
2315         my ($hash, $key, $value) = @_;
2316
2317         if (!exists $hash->{$key}) {
2318                 $hash->{$key} = $value;
2319         } elsif (!ref $hash->{$key}) {
2320                 $hash->{$key} = [ $hash->{$key}, $value ];
2321         } else {
2322                 push @{$hash->{$key}}, $value;
2323         }
2324 }
2325
2326 # return hash of git project configuration
2327 # optionally limited to some section, e.g. 'gitweb'
2328 sub git_parse_project_config {
2329         my $section_regexp = shift;
2330         my %config;
2331
2332         local $/ = "\0";
2333
2334         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2335                 or return;
2336
2337         while (my $keyval = <$fh>) {
2338                 chomp $keyval;
2339                 my ($key, $value) = split(/\n/, $keyval, 2);
2340
2341                 hash_set_multi(\%config, $key, $value)
2342                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2343         }
2344         close $fh;
2345
2346         return %config;
2347 }
2348
2349 # convert config value to boolean: 'true' or 'false'
2350 # no value, number > 0, 'true' and 'yes' values are true
2351 # rest of values are treated as false (never as error)
2352 sub config_to_bool {
2353         my $val = shift;
2354
2355         return 1 if !defined $val;             # section.key
2356
2357         # strip leading and trailing whitespace
2358         $val =~ s/^\s+//;
2359         $val =~ s/\s+$//;
2360
2361         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2362                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2363 }
2364
2365 # convert config value to simple decimal number
2366 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2367 # to be multiplied by 1024, 1048576, or 1073741824
2368 sub config_to_int {
2369         my $val = shift;
2370
2371         # strip leading and trailing whitespace
2372         $val =~ s/^\s+//;
2373         $val =~ s/\s+$//;
2374
2375         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2376                 $unit = lc($unit);
2377                 # unknown unit is treated as 1
2378                 return $num * ($unit eq 'g' ? 1073741824 :
2379                                $unit eq 'm' ?    1048576 :
2380                                $unit eq 'k' ?       1024 : 1);
2381         }
2382         return $val;
2383 }
2384
2385 # convert config value to array reference, if needed
2386 sub config_to_multi {
2387         my $val = shift;
2388
2389         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2390 }
2391
2392 sub git_get_project_config {
2393         my ($key, $type) = @_;
2394
2395         return unless defined $git_dir;
2396
2397         # key sanity check
2398         return unless ($key);
2399         $key =~ s/^gitweb\.//;
2400         return if ($key =~ m/\W/);
2401
2402         # type sanity check
2403         if (defined $type) {
2404                 $type =~ s/^--//;
2405                 $type = undef
2406                         unless ($type eq 'bool' || $type eq 'int');
2407         }
2408
2409         # get config
2410         if (!defined $config_file ||
2411             $config_file ne "$git_dir/config") {
2412                 %config = git_parse_project_config('gitweb');
2413                 $config_file = "$git_dir/config";
2414         }
2415
2416         # check if config variable (key) exists
2417         return unless exists $config{"gitweb.$key"};
2418
2419         # ensure given type
2420         if (!defined $type) {
2421                 return $config{"gitweb.$key"};
2422         } elsif ($type eq 'bool') {
2423                 # backward compatibility: 'git config --bool' returns true/false
2424                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2425         } elsif ($type eq 'int') {
2426                 return config_to_int($config{"gitweb.$key"});
2427         }
2428         return $config{"gitweb.$key"};
2429 }
2430
2431 # get hash of given path at given ref
2432 sub git_get_hash_by_path {
2433         my $base = shift;
2434         my $path = shift || return undef;
2435         my $type = shift;
2436
2437         $path =~ s,/+$,,;
2438
2439         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2440                 or die_error(500, "Open git-ls-tree failed");
2441         my $line = <$fd>;
2442         close $fd or return undef;
2443
2444         if (!defined $line) {
2445                 # there is no tree or hash given by $path at $base
2446                 return undef;
2447         }
2448
2449         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2450         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2451         if (defined $type && $type ne $2) {
2452                 # type doesn't match
2453                 return undef;
2454         }
2455         return $3;
2456 }
2457
2458 # get path of entry with given hash at given tree-ish (ref)
2459 # used to get 'from' filename for combined diff (merge commit) for renames
2460 sub git_get_path_by_hash {
2461         my $base = shift || return;
2462         my $hash = shift || return;
2463
2464         local $/ = "\0";
2465
2466         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2467                 or return undef;
2468         while (my $line = <$fd>) {
2469                 chomp $line;
2470
2471                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2472                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2473                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2474                         close $fd;
2475                         return $1;
2476                 }
2477         }
2478         close $fd;
2479         return undef;
2480 }
2481
2482 ## ......................................................................
2483 ## git utility functions, directly accessing git repository
2484
2485 sub git_get_project_description {
2486         my $path = shift;
2487
2488         $git_dir = "$projectroot/$path";
2489         open my $fd, '<', "$git_dir/description"
2490                 or return git_get_project_config('description');
2491         my $descr = <$fd>;
2492         close $fd;
2493         if (defined $descr) {
2494                 chomp $descr;
2495         }
2496         return $descr;
2497 }
2498
2499 sub git_get_project_ctags {
2500         my $path = shift;
2501         my $ctags = {};
2502
2503         $git_dir = "$projectroot/$path";
2504         opendir my $dh, "$git_dir/ctags"
2505                 or return $ctags;
2506         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2507                 open my $ct, '<', $_ or next;
2508                 my $val = <$ct>;
2509                 chomp $val;
2510                 close $ct;
2511                 my $ctag = $_; $ctag =~ s#.*/##;
2512                 $ctags->{$ctag} = $val;
2513         }
2514         closedir $dh;
2515         $ctags;
2516 }
2517
2518 sub git_populate_project_tagcloud {
2519         my $ctags = shift;
2520
2521         # First, merge different-cased tags; tags vote on casing
2522         my %ctags_lc;
2523         foreach (keys %$ctags) {
2524                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2525                 if (not $ctags_lc{lc $_}->{topcount}
2526                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2527                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2528                         $ctags_lc{lc $_}->{topname} = $_;
2529                 }
2530         }
2531
2532         my $cloud;
2533         if (eval { require HTML::TagCloud; 1; }) {
2534                 $cloud = HTML::TagCloud->new;
2535                 foreach (sort keys %ctags_lc) {
2536                         # Pad the title with spaces so that the cloud looks
2537                         # less crammed.
2538                         my $title = $ctags_lc{$_}->{topname};
2539                         $title =~ s/ /&nbsp;/g;
2540                         $title =~ s/^/&nbsp;/g;
2541                         $title =~ s/$/&nbsp;/g;
2542                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2543                 }
2544         } else {
2545                 $cloud = \%ctags_lc;
2546         }
2547         $cloud;
2548 }
2549
2550 sub git_show_project_tagcloud {
2551         my ($cloud, $count) = @_;
2552         print STDERR ref($cloud)."..\n";
2553         if (ref $cloud eq 'HTML::TagCloud') {
2554                 return $cloud->html_and_css($count);
2555         } else {
2556                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2557                 return '<p align="center">' . join (', ', map {
2558                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2559                 } splice(@tags, 0, $count)) . '</p>';
2560         }
2561 }
2562
2563 sub git_get_project_url_list {
2564         my $path = shift;
2565
2566         $git_dir = "$projectroot/$path";
2567         open my $fd, '<', "$git_dir/cloneurl"
2568                 or return wantarray ?
2569                 @{ config_to_multi(git_get_project_config('url')) } :
2570                    config_to_multi(git_get_project_config('url'));
2571         my @git_project_url_list = map { chomp; $_ } <$fd>;
2572         close $fd;
2573
2574         return wantarray ? @git_project_url_list : \@git_project_url_list;
2575 }
2576
2577 sub git_get_projects_list {
2578         my ($filter) = @_;
2579         my @list;
2580
2581         $filter ||= '';
2582         $filter =~ s/\.git$//;
2583
2584         my $check_forks = gitweb_check_feature('forks');
2585
2586         if (-d $projects_list) {
2587                 # search in directory
2588                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2589                 # remove the trailing "/"
2590                 $dir =~ s!/+$!!;
2591                 my $pfxlen = length("$dir");
2592                 my $pfxdepth = ($dir =~ tr!/!!);
2593
2594                 File::Find::find({
2595                         follow_fast => 1, # follow symbolic links
2596                         follow_skip => 2, # ignore duplicates
2597                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2598                         wanted => sub {
2599                                 # global variables
2600                                 our $project_maxdepth;
2601                                 our $projectroot;
2602                                 # skip project-list toplevel, if we get it.
2603                                 return if (m!^[/.]$!);
2604                                 # only directories can be git repositories
2605                                 return unless (-d $_);
2606                                 # don't traverse too deep (Find is super slow on os x)
2607                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2608                                         $File::Find::prune = 1;
2609                                         return;
2610                                 }
2611
2612                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2613                                 # we check related file in $projectroot
2614                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2615                                 if (check_export_ok("$projectroot/$path")) {
2616                                         push @list, { path => $path };
2617                                         $File::Find::prune = 1;
2618                                 }
2619                         },
2620                 }, "$dir");
2621
2622         } elsif (-f $projects_list) {
2623                 # read from file(url-encoded):
2624                 # 'git%2Fgit.git Linus+Torvalds'
2625                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2626                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2627                 my %paths;
2628                 open my $fd, '<', $projects_list or return;
2629         PROJECT:
2630                 while (my $line = <$fd>) {
2631                         chomp $line;
2632                         my ($path, $owner) = split ' ', $line;
2633                         $path = unescape($path);
2634                         $owner = unescape($owner);
2635                         if (!defined $path) {
2636                                 next;
2637                         }
2638                         if ($filter ne '') {
2639                                 # looking for forks;
2640                                 my $pfx = substr($path, 0, length($filter));
2641                                 if ($pfx ne $filter) {
2642                                         next PROJECT;
2643                                 }
2644                                 my $sfx = substr($path, length($filter));
2645                                 if ($sfx !~ /^\/.*\.git$/) {
2646                                         next PROJECT;
2647                                 }
2648                         } elsif ($check_forks) {
2649                         PATH:
2650                                 foreach my $filter (keys %paths) {
2651                                         # looking for forks;
2652                                         my $pfx = substr($path, 0, length($filter));
2653                                         if ($pfx ne $filter) {
2654                                                 next PATH;
2655                                         }
2656                                         my $sfx = substr($path, length($filter));
2657                                         if ($sfx !~ /^\/.*\.git$/) {
2658                                                 next PATH;
2659                                         }
2660                                         # is a fork, don't include it in
2661                                         # the list
2662                                         next PROJECT;
2663                                 }
2664                         }
2665                         if (check_export_ok("$projectroot/$path")) {
2666                                 my $pr = {
2667                                         path => $path,
2668                                         owner => to_utf8($owner),
2669                                 };
2670                                 push @list, $pr;
2671                                 (my $forks_path = $path) =~ s/\.git$//;
2672                                 $paths{$forks_path}++;
2673                         }
2674                 }
2675                 close $fd;
2676         }
2677         return @list;
2678 }
2679
2680 our $gitweb_project_owner = undef;
2681 sub git_get_project_list_from_file {
2682
2683         return if (defined $gitweb_project_owner);
2684
2685         $gitweb_project_owner = {};
2686         # read from file (url-encoded):
2687         # 'git%2Fgit.git Linus+Torvalds'
2688         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2689         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2690         if (-f $projects_list) {
2691                 open(my $fd, '<', $projects_list);
2692                 while (my $line = <$fd>) {
2693                         chomp $line;
2694                         my ($pr, $ow) = split ' ', $line;
2695                         $pr = unescape($pr);
2696                         $ow = unescape($ow);
2697                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2698                 }
2699                 close $fd;
2700         }
2701 }
2702
2703 sub git_get_project_owner {
2704         my $project = shift;
2705         my $owner;
2706
2707         return undef unless $project;
2708         $git_dir = "$projectroot/$project";
2709
2710         if (!defined $gitweb_project_owner) {
2711                 git_get_project_list_from_file();
2712         }
2713
2714         if (exists $gitweb_project_owner->{$project}) {
2715                 $owner = $gitweb_project_owner->{$project};
2716         }
2717         if (!defined $owner){
2718                 $owner = git_get_project_config('owner');
2719         }
2720         if (!defined $owner) {
2721                 $owner = get_file_owner("$git_dir");
2722         }
2723
2724         return $owner;
2725 }
2726
2727 sub git_get_last_activity {
2728         my ($path) = @_;
2729         my $fd;
2730
2731         $git_dir = "$projectroot/$path";
2732         open($fd, "-|", git_cmd(), 'for-each-ref',
2733              '--format=%(committer)',
2734              '--sort=-committerdate',
2735              '--count=1',
2736              'refs/heads') or return;
2737         my $most_recent = <$fd>;
2738         close $fd or return;
2739         if (defined $most_recent &&
2740             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2741                 my $timestamp = $1;
2742                 my $age = time - $timestamp;
2743                 return ($age, age_string($age));
2744         }
2745         return (undef, undef);
2746 }
2747
2748 sub git_get_references {
2749         my $type = shift || "";
2750         my %refs;
2751         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2752         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2753         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2754                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2755                 or return;
2756
2757         while (my $line = <$fd>) {
2758                 chomp $line;
2759                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2760                         if (defined $refs{$1}) {
2761                                 push @{$refs{$1}}, $2;
2762                         } else {
2763                                 $refs{$1} = [ $2 ];
2764                         }
2765                 }
2766         }
2767         close $fd or return;
2768         return \%refs;
2769 }
2770
2771 sub git_get_rev_name_tags {
2772         my $hash = shift || return undef;
2773
2774         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2775                 or return;
2776         my $name_rev = <$fd>;
2777         close $fd;
2778
2779         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2780                 return $1;
2781         } else {
2782                 # catches also '$hash undefined' output
2783                 return undef;
2784         }
2785 }
2786
2787 ## ----------------------------------------------------------------------
2788 ## parse to hash functions
2789
2790 sub parse_date {
2791         my $epoch = shift;
2792         my $tz = shift || "-0000";
2793
2794         my %date;
2795         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2796         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2797         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2798         $date{'hour'} = $hour;
2799         $date{'minute'} = $min;
2800         $date{'mday'} = $mday;
2801         $date{'day'} = $days[$wday];
2802         $date{'month'} = $months[$mon];
2803         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2804                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2805         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2806                              $mday, $months[$mon], $hour ,$min;
2807         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2808                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2809
2810         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2811         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2812         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2813         $date{'hour_local'} = $hour;
2814         $date{'minute_local'} = $min;
2815         $date{'tz_local'} = $tz;
2816         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2817                                   1900+$year, $mon+1, $mday,
2818                                   $hour, $min, $sec, $tz);
2819         return %date;
2820 }
2821
2822 sub parse_tag {
2823         my $tag_id = shift;
2824         my %tag;
2825         my @comment;
2826
2827         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2828         $tag{'id'} = $tag_id;
2829         while (my $line = <$fd>) {
2830                 chomp $line;
2831                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2832                         $tag{'object'} = $1;
2833                 } elsif ($line =~ m/^type (.+)$/) {
2834                         $tag{'type'} = $1;
2835                 } elsif ($line =~ m/^tag (.+)$/) {
2836                         $tag{'name'} = $1;
2837                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2838                         $tag{'author'} = $1;
2839                         $tag{'author_epoch'} = $2;
2840                         $tag{'author_tz'} = $3;
2841                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2842                                 $tag{'author_name'}  = $1;
2843                                 $tag{'author_email'} = $2;
2844                         } else {
2845                                 $tag{'author_name'} = $tag{'author'};
2846                         }
2847                 } elsif ($line =~ m/--BEGIN/) {
2848                         push @comment, $line;
2849                         last;
2850                 } elsif ($line eq "") {
2851                         last;
2852                 }
2853         }
2854         push @comment, <$fd>;
2855         $tag{'comment'} = \@comment;
2856         close $fd or return;
2857         if (!defined $tag{'name'}) {
2858                 return
2859         };
2860         return %tag
2861 }
2862
2863 sub parse_commit_text {
2864         my ($commit_text, $withparents) = @_;
2865         my @commit_lines = split '\n', $commit_text;
2866         my %co;
2867
2868         pop @commit_lines; # Remove '\0'
2869
2870         if (! @commit_lines) {
2871                 return;
2872         }
2873
2874         my $header = shift @commit_lines;
2875         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2876                 return;
2877         }
2878         ($co{'id'}, my @parents) = split ' ', $header;
2879         while (my $line = shift @commit_lines) {
2880                 last if $line eq "\n";
2881                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2882                         $co{'tree'} = $1;
2883                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2884                         push @parents, $1;
2885                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2886                         $co{'author'} = to_utf8($1);
2887                         $co{'author_epoch'} = $2;
2888                         $co{'author_tz'} = $3;
2889                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2890                                 $co{'author_name'}  = $1;
2891                                 $co{'author_email'} = $2;
2892                         } else {
2893                                 $co{'author_name'} = $co{'author'};
2894                         }
2895                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2896                         $co{'committer'} = to_utf8($1);
2897                         $co{'committer_epoch'} = $2;
2898                         $co{'committer_tz'} = $3;
2899                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2900                                 $co{'committer_name'}  = $1;
2901                                 $co{'committer_email'} = $2;
2902                         } else {
2903                                 $co{'committer_name'} = $co{'committer'};
2904                         }
2905                 }
2906         }
2907         if (!defined $co{'tree'}) {
2908                 return;
2909         };
2910         $co{'parents'} = \@parents;
2911         $co{'parent'} = $parents[0];
2912
2913         foreach my $title (@commit_lines) {
2914                 $title =~ s/^    //;
2915                 if ($title ne "") {
2916                         $co{'title'} = chop_str($title, 80, 5);
2917                         # remove leading stuff of merges to make the interesting part visible
2918                         if (length($title) > 50) {
2919                                 $title =~ s/^Automatic //;
2920                                 $title =~ s/^merge (of|with) /Merge ... /i;
2921                                 if (length($title) > 50) {
2922                                         $title =~ s/(http|rsync):\/\///;
2923                                 }
2924                                 if (length($title) > 50) {
2925                                         $title =~ s/(master|www|rsync)\.//;
2926                                 }
2927                                 if (length($title) > 50) {
2928                                         $title =~ s/kernel.org:?//;
2929                                 }
2930                                 if (length($title) > 50) {
2931                                         $title =~ s/\/pub\/scm//;
2932                                 }
2933                         }
2934                         $co{'title_short'} = chop_str($title, 50, 5);
2935                         last;
2936                 }
2937         }
2938         if (! defined $co{'title'} || $co{'title'} eq "") {
2939                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2940         }
2941         # remove added spaces
2942         foreach my $line (@commit_lines) {
2943                 $line =~ s/^    //;
2944         }
2945         $co{'comment'} = \@commit_lines;
2946
2947         my $age = time - $co{'committer_epoch'};
2948         $co{'age'} = $age;
2949         $co{'age_string'} = age_string($age);
2950         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2951         if ($age > 60*60*24*7*2) {
2952                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2953                 $co{'age_string_age'} = $co{'age_string'};
2954         } else {
2955                 $co{'age_string_date'} = $co{'age_string'};
2956                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2957         }
2958         return %co;
2959 }
2960
2961 sub parse_commit {
2962         my ($commit_id) = @_;
2963         my %co;
2964
2965         local $/ = "\0";
2966
2967         open my $fd, "-|", git_cmd(), "rev-list",
2968                 "--parents",
2969                 "--header",
2970                 "--max-count=1",
2971                 $commit_id,
2972                 "--",
2973                 or die_error(500, "Open git-rev-list failed");
2974         %co = parse_commit_text(<$fd>, 1);
2975         close $fd;
2976
2977         return %co;
2978 }
2979
2980 sub parse_commits {
2981         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2982         my @cos;
2983
2984         $maxcount ||= 1;
2985         $skip ||= 0;
2986
2987         local $/ = "\0";
2988
2989         open my $fd, "-|", git_cmd(), "rev-list",
2990                 "--header",
2991                 @args,
2992                 ("--max-count=" . $maxcount),
2993                 ("--skip=" . $skip),
2994                 @extra_options,
2995                 $commit_id,
2996                 "--",
2997                 ($filename ? ($filename) : ())
2998                 or die_error(500, "Open git-rev-list failed");
2999         while (my $line = <$fd>) {
3000                 my %co = parse_commit_text($line);
3001                 push @cos, \%co;
3002         }
3003         close $fd;
3004
3005         return wantarray ? @cos : \@cos;
3006 }
3007
3008 # parse line of git-diff-tree "raw" output
3009 sub parse_difftree_raw_line {
3010         my $line = shift;
3011         my %res;
3012
3013         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3014         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3015         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3016                 $res{'from_mode'} = $1;
3017                 $res{'to_mode'} = $2;
3018                 $res{'from_id'} = $3;
3019                 $res{'to_id'} = $4;
3020                 $res{'status'} = $5;
3021                 $res{'similarity'} = $6;
3022                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3023                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3024                 } else {
3025                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3026                 }
3027         }
3028         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3029         # combined diff (for merge commit)
3030         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3031                 $res{'nparents'}  = length($1);
3032                 $res{'from_mode'} = [ split(' ', $2) ];
3033                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3034                 $res{'from_id'} = [ split(' ', $3) ];
3035                 $res{'to_id'} = pop @{$res{'from_id'}};
3036                 $res{'status'} = [ split('', $4) ];
3037                 $res{'to_file'} = unquote($5);
3038         }
3039         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3040         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3041                 $res{'commit'} = $1;
3042         }
3043
3044         return wantarray ? %res : \%res;
3045 }
3046
3047 # wrapper: return parsed line of git-diff-tree "raw" output
3048 # (the argument might be raw line, or parsed info)
3049 sub parsed_difftree_line {
3050         my $line_or_ref = shift;
3051
3052         if (ref($line_or_ref) eq "HASH") {
3053                 # pre-parsed (or generated by hand)
3054                 return $line_or_ref;
3055         } else {
3056                 return parse_difftree_raw_line($line_or_ref);
3057         }
3058 }
3059
3060 # parse line of git-ls-tree output
3061 sub parse_ls_tree_line {
3062         my $line = shift;
3063         my %opts = @_;
3064         my %res;
3065
3066         if ($opts{'-l'}) {
3067                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3068                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3069
3070                 $res{'mode'} = $1;
3071                 $res{'type'} = $2;
3072                 $res{'hash'} = $3;
3073                 $res{'size'} = $4;
3074                 if ($opts{'-z'}) {
3075                         $res{'name'} = $5;
3076                 } else {
3077                         $res{'name'} = unquote($5);
3078                 }
3079         } else {
3080                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3081                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3082
3083                 $res{'mode'} = $1;
3084                 $res{'type'} = $2;
3085                 $res{'hash'} = $3;
3086                 if ($opts{'-z'}) {
3087                         $res{'name'} = $4;
3088                 } else {
3089                         $res{'name'} = unquote($4);
3090                 }
3091         }
3092
3093         return wantarray ? %res : \%res;
3094 }
3095
3096 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3097 sub parse_from_to_diffinfo {
3098         my ($diffinfo, $from, $to, @parents) = @_;
3099
3100         if ($diffinfo->{'nparents'}) {
3101                 # combined diff
3102                 $from->{'file'} = [];
3103                 $from->{'href'} = [];
3104                 fill_from_file_info($diffinfo, @parents)
3105                         unless exists $diffinfo->{'from_file'};
3106                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3107                         $from->{'file'}[$i] =
3108                                 defined $diffinfo->{'from_file'}[$i] ?
3109                                         $diffinfo->{'from_file'}[$i] :
3110                                         $diffinfo->{'to_file'};
3111                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3112                                 $from->{'href'}[$i] = href(action=>"blob",
3113                                                            hash_base=>$parents[$i],
3114                                                            hash=>$diffinfo->{'from_id'}[$i],
3115                                                            file_name=>$from->{'file'}[$i]);
3116                         } else {
3117                                 $from->{'href'}[$i] = undef;
3118                         }
3119                 }
3120         } else {
3121                 # ordinary (not combined) diff
3122                 $from->{'file'} = $diffinfo->{'from_file'};
3123                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3124                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3125                                                hash=>$diffinfo->{'from_id'},
3126                                                file_name=>$from->{'file'});
3127                 } else {
3128                         delete $from->{'href'};
3129                 }
3130         }
3131
3132         $to->{'file'} = $diffinfo->{'to_file'};
3133         if (!is_deleted($diffinfo)) { # file exists in result
3134                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3135                                      hash=>$diffinfo->{'to_id'},
3136                                      file_name=>$to->{'file'});
3137         } else {
3138                 delete $to->{'href'};
3139         }
3140 }
3141
3142 ## ......................................................................
3143 ## parse to array of hashes functions
3144
3145 sub git_get_heads_list {
3146         my $limit = shift;
3147         my @headslist;
3148
3149         open my $fd, '-|', git_cmd(), 'for-each-ref',
3150                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3151                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3152                 'refs/heads'
3153                 or return;
3154         while (my $line = <$fd>) {
3155                 my %ref_item;
3156
3157                 chomp $line;
3158                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3159                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3160                 my ($committer, $epoch, $tz) =
3161                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3162                 $ref_item{'fullname'}  = $name;
3163                 $name =~ s!^refs/heads/!!;
3164
3165                 $ref_item{'name'}  = $name;
3166                 $ref_item{'id'}    = $hash;
3167                 $ref_item{'title'} = $title || '(no commit message)';
3168                 $ref_item{'epoch'} = $epoch;
3169                 if ($epoch) {
3170                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3171                 } else {
3172                         $ref_item{'age'} = "unknown";
3173                 }
3174
3175                 push @headslist, \%ref_item;
3176         }
3177         close $fd;
3178
3179         return wantarray ? @headslist : \@headslist;
3180 }
3181
3182 sub git_get_tags_list {
3183         my $limit = shift;
3184         my @tagslist;
3185
3186         open my $fd, '-|', git_cmd(), 'for-each-ref',
3187                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3188                 '--format=%(objectname) %(objecttype) %(refname) '.
3189                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3190                 'refs/tags'
3191                 or return;
3192         while (my $line = <$fd>) {
3193                 my %ref_item;
3194
3195                 chomp $line;
3196                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3197                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3198                 my ($creator, $epoch, $tz) =
3199                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3200                 $ref_item{'fullname'} = $name;
3201                 $name =~ s!^refs/tags/!!;
3202
3203                 $ref_item{'type'} = $type;
3204                 $ref_item{'id'} = $id;
3205                 $ref_item{'name'} = $name;
3206                 if ($type eq "tag") {
3207                         $ref_item{'subject'} = $title;
3208                         $ref_item{'reftype'} = $reftype;
3209                         $ref_item{'refid'}   = $refid;
3210                 } else {
3211                         $ref_item{'reftype'} = $type;
3212                         $ref_item{'refid'}   = $id;
3213                 }
3214
3215                 if ($type eq "tag" || $type eq "commit") {
3216                         $ref_item{'epoch'} = $epoch;
3217                         if ($epoch) {
3218                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3219                         } else {
3220                                 $ref_item{'age'} = "unknown";
3221                         }
3222                 }
3223
3224                 push @tagslist, \%ref_item;
3225         }
3226         close $fd;
3227
3228         return wantarray ? @tagslist : \@tagslist;
3229 }
3230
3231 ## ----------------------------------------------------------------------
3232 ## filesystem-related functions
3233
3234 sub get_file_owner {
3235         my $path = shift;
3236
3237         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3238         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3239         if (!defined $gcos) {
3240                 return undef;
3241         }
3242         my $owner = $gcos;
3243         $owner =~ s/[,;].*$//;
3244         return to_utf8($owner);
3245 }
3246
3247 # assume that file exists
3248 sub insert_file {
3249         my $filename = shift;
3250
3251         open my $fd, '<', $filename;
3252         print map { to_utf8($_) } <$fd>;
3253         close $fd;
3254 }
3255
3256 ## ......................................................................
3257 ## mimetype related functions
3258
3259 sub mimetype_guess_file {
3260         my $filename = shift;
3261         my $mimemap = shift;
3262         -r $mimemap or return undef;
3263
3264         my %mimemap;
3265         open(my $mh, '<', $mimemap) or return undef;
3266         while (<$mh>) {
3267                 next if m/^#/; # skip comments
3268                 my ($mimetype, $exts) = split(/\t+/);
3269                 if (defined $exts) {
3270                         my @exts = split(/\s+/, $exts);
3271                         foreach my $ext (@exts) {
3272                                 $mimemap{$ext} = $mimetype;
3273                         }
3274                 }
3275         }
3276         close($mh);
3277
3278         $filename =~ /\.([^.]*)$/;
3279         return $mimemap{$1};
3280 }
3281
3282 sub mimetype_guess {
3283         my $filename = shift;
3284         my $mime;
3285         $filename =~ /\./ or return undef;
3286
3287         if ($mimetypes_file) {
3288                 my $file = $mimetypes_file;
3289                 if ($file !~ m!^/!) { # if it is relative path
3290                         # it is relative to project
3291                         $file = "$projectroot/$project/$file";
3292                 }
3293                 $mime = mimetype_guess_file($filename, $file);
3294         }
3295         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3296         return $mime;
3297 }
3298
3299 sub blob_mimetype {
3300         my $fd = shift;
3301         my $filename = shift;
3302
3303         if ($filename) {
3304                 my $mime = mimetype_guess($filename);
3305                 $mime and return $mime;
3306         }
3307
3308         # just in case
3309         return $default_blob_plain_mimetype unless $fd;
3310
3311         if (-T $fd) {
3312                 return 'text/plain';
3313         } elsif (! $filename) {
3314                 return 'application/octet-stream';
3315         } elsif ($filename =~ m/\.png$/i) {
3316                 return 'image/png';
3317         } elsif ($filename =~ m/\.gif$/i) {
3318                 return 'image/gif';
3319         } elsif ($filename =~ m/\.jpe?g$/i) {
3320                 return 'image/jpeg';
3321         } else {
3322                 return 'application/octet-stream';
3323         }
3324 }
3325
3326 sub blob_contenttype {
3327         my ($fd, $file_name, $type) = @_;
3328
3329         $type ||= blob_mimetype($fd, $file_name);
3330         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3331                 $type .= "; charset=$default_text_plain_charset";
3332         }
3333
3334         return $type;
3335 }
3336
3337 # guess file syntax for syntax highlighting; return undef if no highlighting
3338 # the name of syntax can (in the future) depend on syntax highlighter used
3339 sub guess_file_syntax {
3340         my ($highlight, $mimetype, $file_name) = @_;
3341         return undef unless ($highlight && defined $file_name);
3342         my $basename = basename($file_name, '.in');
3343         return $highlight_basename{$basename}
3344                 if exists $highlight_basename{$basename};
3345
3346         $basename =~ /\.([^.]*)$/;
3347         my $ext = $1 or return undef;
3348         return $highlight_ext{$ext}
3349                 if exists $highlight_ext{$ext};
3350
3351         return undef;
3352 }
3353
3354 # run highlighter and return FD of its output,
3355 # or return original FD if no highlighting
3356 sub run_highlighter {
3357         my ($fd, $highlight, $syntax) = @_;
3358         return $fd unless ($highlight && defined $syntax);
3359
3360         close $fd
3361                 or die_error(404, "Reading blob failed");
3362         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3363                   "highlight --xhtml --fragment --syntax $syntax |"
3364                 or die_error(500, "Couldn't open file or run syntax highlighter");
3365         return $fd;
3366 }
3367
3368 ## ======================================================================
3369 ## functions printing HTML: header, footer, error page
3370
3371 sub get_page_title {
3372         my $title = to_utf8($site_name);
3373
3374         return $title unless (defined $project);
3375         $title .= " - " . to_utf8($project);
3376
3377         return $title unless (defined $action);
3378         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3379
3380         return $title unless (defined $file_name);
3381         $title .= " - " . esc_path($file_name);
3382         if ($action eq "tree" && $file_name !~ m|/$|) {
3383                 $title .= "/";
3384         }
3385
3386         return $title;
3387 }
3388
3389 sub git_header_html {
3390         my $status = shift || "200 OK";
3391         my $expires = shift;
3392         my %opts = @_;
3393
3394         my $title = get_page_title();
3395         my $content_type;
3396         # require explicit support from the UA if we are to send the page as
3397         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3398         # we have to do this because MSIE sometimes globs '*/*', pretending to
3399         # support xhtml+xml but choking when it gets what it asked for.
3400         if (defined $cgi->http('HTTP_ACCEPT') &&
3401             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3402             $cgi->Accept('application/xhtml+xml') != 0) {
3403                 $content_type = 'application/xhtml+xml';
3404         } else {
3405                 $content_type = 'text/html';
3406         }
3407         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3408                            -status=> $status, -expires => $expires)
3409                 unless ($opts{'-no_http_header'});
3410         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3411         print <<EOF;
3412 <?xml version="1.0" encoding="utf-8"?>
3413 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3414 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3415 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3416 <!-- git core binaries version $git_version -->
3417 <head>
3418 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3419 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3420 <meta name="robots" content="index, nofollow"/>
3421 <title>$title</title>
3422 EOF
3423         # the stylesheet, favicon etc urls won't work correctly with path_info
3424         # unless we set the appropriate base URL
3425         if ($ENV{'PATH_INFO'}) {
3426                 print "<base href=\"".esc_url($base_url)."\" />\n";
3427         }
3428         # print out each stylesheet that exist, providing backwards capability
3429         # for those people who defined $stylesheet in a config file
3430         if (defined $stylesheet) {
3431                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3432         } else {
3433                 foreach my $stylesheet (@stylesheets) {
3434                         next unless $stylesheet;
3435                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3436                 }
3437         }
3438         if (defined $project) {
3439                 my %href_params = get_feed_info();
3440                 if (!exists $href_params{'-title'}) {
3441                         $href_params{'-title'} = 'log';
3442                 }
3443
3444                 foreach my $format qw(RSS Atom) {
3445                         my $type = lc($format);
3446                         my %link_attr = (
3447                                 '-rel' => 'alternate',
3448                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3449                                 '-type' => "application/$type+xml"
3450                         );
3451
3452                         $href_params{'action'} = $type;
3453                         $link_attr{'-href'} = href(%href_params);
3454                         print "<link ".
3455                               "rel=\"$link_attr{'-rel'}\" ".
3456                               "title=\"$link_attr{'-title'}\" ".
3457                               "href=\"$link_attr{'-href'}\" ".
3458                               "type=\"$link_attr{'-type'}\" ".
3459                               "/>\n";
3460
3461                         $href_params{'extra_options'} = '--no-merges';
3462                         $link_attr{'-href'} = href(%href_params);
3463                         $link_attr{'-title'} .= ' (no merges)';
3464                         print "<link ".
3465                               "rel=\"$link_attr{'-rel'}\" ".
3466                               "title=\"$link_attr{'-title'}\" ".
3467                               "href=\"$link_attr{'-href'}\" ".
3468                               "type=\"$link_attr{'-type'}\" ".
3469                               "/>\n";
3470                 }
3471
3472         } else {
3473                 printf('<link rel="alternate" title="%s projects list" '.
3474                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3475                        $site_name, href(project=>undef, action=>"project_index"));
3476                 printf('<link rel="alternate" title="%s projects feeds" '.
3477                        'href="%s" type="text/x-opml" />'."\n",
3478                        $site_name, href(project=>undef, action=>"opml"));
3479         }
3480         if (defined $favicon) {
3481                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3482         }
3483
3484         print "</head>\n" .
3485               "<body>\n";
3486
3487         if (defined $site_header && -f $site_header) {
3488                 insert_file($site_header);
3489         }
3490
3491         print "<div class=\"page_header\">\n" .
3492               $cgi->a({-href => esc_url($logo_url),
3493                        -title => $logo_label},
3494                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3495         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3496         if (defined $project) {
3497                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3498                 if (defined $action) {
3499                         print " / $action";
3500                 }
3501                 print "\n";
3502         }
3503         print "</div>\n";
3504
3505         my $have_search = gitweb_check_feature('search');
3506         if (defined $project && $have_search) {
3507                 if (!defined $searchtext) {
3508                         $searchtext = "";
3509                 }
3510                 my $search_hash;
3511                 if (defined $hash_base) {
3512                         $search_hash = $hash_base;
3513                 } elsif (defined $hash) {
3514                         $search_hash = $hash;
3515                 } else {
3516                         $search_hash = "HEAD";
3517                 }
3518                 my $action = $my_uri;
3519                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3520                 if ($use_pathinfo) {
3521                         $action .= "/".esc_url($project);
3522                 }
3523                 print $cgi->startform(-method => "get", -action => $action) .
3524                       "<div class=\"search\">\n" .
3525                       (!$use_pathinfo &&
3526                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3527                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3528                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3529                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3530                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3531                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3532                       " search:\n",
3533                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3534                       "<span title=\"Extended regular expression\">" .
3535                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3536                                      -checked => $search_use_regexp) .
3537                       "</span>" .
3538                       "</div>" .
3539                       $cgi->end_form() . "\n";
3540         }
3541 }
3542
3543 sub git_footer_html {
3544         my $feed_class = 'rss_logo';
3545
3546         print "<div class=\"page_footer\">\n";
3547         if (defined $project) {
3548                 my $descr = git_get_project_description($project);
3549                 if (defined $descr) {
3550                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3551                 }
3552
3553                 my %href_params = get_feed_info();
3554                 if (!%href_params) {
3555                         $feed_class .= ' generic';
3556                 }
3557                 $href_params{'-title'} ||= 'log';
3558
3559                 foreach my $format qw(RSS Atom) {
3560                         $href_params{'action'} = lc($format);
3561                         print $cgi->a({-href => href(%href_params),
3562                                       -title => "$href_params{'-title'} $format feed",
3563                                       -class => $feed_class}, $format)."\n";
3564                 }
3565
3566         } else {
3567                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3568                               -class => $feed_class}, "OPML") . " ";
3569                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3570                               -class => $feed_class}, "TXT") . "\n";
3571         }
3572         print "</div>\n"; # class="page_footer"
3573
3574         if (defined $t0 && gitweb_check_feature('timed')) {
3575                 print "<div id=\"generating_info\">\n";
3576                 print 'This page took '.
3577                       '<span id="generating_time" class="time_span">'.
3578                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3579                       ' seconds </span>'.
3580                       ' and '.
3581                       '<span id="generating_cmd">'.
3582                       $number_of_git_cmds.
3583                       '</span> git commands '.
3584                       " to generate.\n";
3585                 print "</div>\n"; # class="page_footer"
3586         }
3587
3588         if (defined $site_footer && -f $site_footer) {
3589                 insert_file($site_footer);
3590         }
3591
3592         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3593         if (defined $action &&
3594             $action eq 'blame_incremental') {
3595                 print qq!<script type="text/javascript">\n!.
3596                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3597                       qq!           "!. href() .qq!");\n!.
3598                       qq!</script>\n!;
3599         } elsif (gitweb_check_feature('javascript-actions')) {
3600                 print qq!<script type="text/javascript">\n!.
3601                       qq!window.onload = fixLinks;\n!.
3602                       qq!</script>\n!;
3603         }
3604
3605         print "</body>\n" .
3606               "</html>";
3607 }
3608
3609 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3610 # Example: die_error(404, 'Hash not found')
3611 # By convention, use the following status codes (as defined in RFC 2616):
3612 # 400: Invalid or missing CGI parameters, or
3613 #      requested object exists but has wrong type.
3614 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3615 #      this server or project.
3616 # 404: Requested object/revision/project doesn't exist.
3617 # 500: The server isn't configured properly, or
3618 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3619 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3620 # 503: The server is currently unavailable (because it is overloaded,
3621 #      or down for maintenance).  Generally, this is a temporary state.
3622 sub die_error {
3623         my $status = shift || 500;
3624         my $error = esc_html(shift) || "Internal Server Error";
3625         my $extra = shift;
3626         my %opts = @_;
3627
3628         my %http_responses = (
3629                 400 => '400 Bad Request',
3630                 403 => '403 Forbidden',
3631                 404 => '404 Not Found',
3632                 500 => '500 Internal Server Error',
3633                 503 => '503 Service Unavailable',
3634         );
3635         git_header_html($http_responses{$status}, undef, %opts);
3636         print <<EOF;
3637 <div class="page_body">
3638 <br /><br />
3639 $status - $error
3640 <br />
3641 EOF
3642         if (defined $extra) {
3643                 print "<hr />\n" .
3644                       "$extra\n";
3645         }
3646         print "</div>\n";
3647
3648         git_footer_html();
3649         goto DONE_GITWEB
3650                 unless ($opts{'-error_handler'});
3651 }
3652
3653 ## ----------------------------------------------------------------------
3654 ## functions printing or outputting HTML: navigation
3655
3656 sub git_print_page_nav {
3657         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3658         $extra = '' if !defined $extra; # pager or formats
3659
3660         my @navs = qw(summary shortlog log commit commitdiff tree);
3661         if ($suppress) {
3662                 @navs = grep { $_ ne $suppress } @navs;
3663         }
3664
3665         my %arg = map { $_ => {action=>$_} } @navs;
3666         if (defined $head) {
3667                 for (qw(commit commitdiff)) {
3668                         $arg{$_}{'hash'} = $head;
3669                 }
3670                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3671                         for (qw(shortlog log)) {
3672                                 $arg{$_}{'hash'} = $head;
3673                         }
3674                 }
3675         }
3676
3677         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3678         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3679
3680         my @actions = gitweb_get_feature('actions');
3681         my %repl = (
3682                 '%' => '%',
3683                 'n' => $project,         # project name
3684                 'f' => $git_dir,         # project path within filesystem
3685                 'h' => $treehead || '',  # current hash ('h' parameter)
3686                 'b' => $treebase || '',  # hash base ('hb' parameter)
3687         );
3688         while (@actions) {
3689                 my ($label, $link, $pos) = splice(@actions,0,3);
3690                 # insert
3691                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3692                 # munch munch
3693                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3694                 $arg{$label}{'_href'} = $link;
3695         }
3696
3697         print "<div class=\"page_nav\">\n" .
3698                 (join " | ",
3699                  map { $_ eq $current ?
3700                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3701                  } @navs);
3702         print "<br/>\n$extra<br/>\n" .
3703               "</div>\n";
3704 }
3705
3706 sub format_paging_nav {
3707         my ($action, $page, $has_next_link) = @_;
3708         my $paging_nav;
3709
3710
3711         if ($page > 0) {
3712                 $paging_nav .=
3713                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3714                         " &sdot; " .
3715                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3716                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3717         } else {
3718                 $paging_nav .= "first &sdot; prev";
3719         }
3720
3721         if ($has_next_link) {
3722                 $paging_nav .= " &sdot; " .
3723                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3724                                  -accesskey => "n", -title => "Alt-n"}, "next");
3725         } else {
3726                 $paging_nav .= " &sdot; next";
3727         }
3728
3729         return $paging_nav;
3730 }
3731
3732 ## ......................................................................
3733 ## functions printing or outputting HTML: div
3734
3735 sub git_print_header_div {
3736         my ($action, $title, $hash, $hash_base) = @_;
3737         my %args = ();
3738
3739         $args{'action'} = $action;
3740         $args{'hash'} = $hash if $hash;
3741         $args{'hash_base'} = $hash_base if $hash_base;
3742
3743         print "<div class=\"header\">\n" .
3744               $cgi->a({-href => href(%args), -class => "title"},
3745               $title ? $title : $action) .
3746               "\n</div>\n";
3747 }
3748
3749 sub print_local_time {
3750         print format_local_time(@_);
3751 }
3752
3753 sub format_local_time {
3754         my $localtime = '';
3755         my %date = @_;
3756         if ($date{'hour_local'} < 6) {
3757                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3758                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3759         } else {
3760                 $localtime .= sprintf(" (%02d:%02d %s)",
3761                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3762         }
3763
3764         return $localtime;
3765 }
3766
3767 # Outputs the author name and date in long form
3768 sub git_print_authorship {
3769         my $co = shift;
3770         my %opts = @_;
3771         my $tag = $opts{-tag} || 'div';
3772         my $author = $co->{'author_name'};
3773
3774         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3775         print "<$tag class=\"author_date\">" .
3776               format_search_author($author, "author", esc_html($author)) .
3777               " [$ad{'rfc2822'}";
3778         print_local_time(%ad) if ($opts{-localtime});
3779         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3780                   . "</$tag>\n";
3781 }
3782
3783 # Outputs table rows containing the full author or committer information,
3784 # in the format expected for 'commit' view (& similar).
3785 # Parameters are a commit hash reference, followed by the list of people
3786 # to output information for. If the list is empty it defaults to both
3787 # author and committer.
3788 sub git_print_authorship_rows {
3789         my $co = shift;
3790         # too bad we can't use @people = @_ || ('author', 'committer')
3791         my @people = @_;
3792         @people = ('author', 'committer') unless @people;
3793         foreach my $who (@people) {
3794                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3795                 print "<tr><td>$who</td><td>" .
3796                       format_search_author($co->{"${who}_name"}, $who,
3797                                esc_html($co->{"${who}_name"})) . " " .
3798                       format_search_author($co->{"${who}_email"}, $who,
3799                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3800                       "</td><td rowspan=\"2\">" .
3801                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3802                       "</td></tr>\n" .
3803                       "<tr>" .
3804                       "<td></td><td> $wd{'rfc2822'}";
3805                 print_local_time(%wd);
3806                 print "</td>" .
3807                       "</tr>\n";
3808         }
3809 }
3810
3811 sub git_print_page_path {
3812         my $name = shift;
3813         my $type = shift;
3814         my $hb = shift;
3815
3816
3817         print "<div class=\"page_path\">";
3818         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3819                       -title => 'tree root'}, to_utf8("[$project]"));
3820         print " / ";
3821         if (defined $name) {
3822                 my @dirname = split '/', $name;
3823                 my $basename = pop @dirname;
3824                 my $fullname = '';
3825
3826                 foreach my $dir (@dirname) {
3827                         $fullname .= ($fullname ? '/' : '') . $dir;
3828                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3829                                                      hash_base=>$hb),
3830                                       -title => $fullname}, esc_path($dir));
3831                         print " / ";
3832                 }
3833                 if (defined $type && $type eq 'blob') {
3834                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3835                                                      hash_base=>$hb),
3836                                       -title => $name}, esc_path($basename));
3837                         print '&nbsp;&nbsp;&nbsp;&nbsp;
3838 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
3839 <script>
3840 function toggleLineNumbers() {
3841         e = document.getElementById("lineNoStyle");
3842         e2 = document.getElementById("lineNoToggle");
3843         if (e2.innerHTML == "[Hide line numbers]") {
3844                 e.innerHTML = ".linenr { display:none; }";
3845                 e2.innerHTML = "[Show line numbers]";
3846         }
3847         else {
3848                 e.innerHTML = "";
3849                 e2.innerHTML = "[Hide line numbers]";
3850         }
3851 }
3852 var style = document.createElement("style");
3853 style.setAttribute("id", "lineNoStyle");
3854 document.getElementsByTagName("head")[0].appendChild(style);
3855 toggleLineNumbers();
3856 </script>
3857 ';
3858                 } elsif (defined $type && $type eq 'tree') {
3859                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3860                                                      hash_base=>$hb),
3861                                       -title => $name}, esc_path($basename));
3862                         print " / ";
3863                 } else {
3864                         print esc_path($basename);
3865                 }
3866         }
3867         print "<br/></div>\n";
3868 }
3869
3870 sub git_print_log {
3871         my $log = shift;
3872         my %opts = @_;
3873
3874         if ($opts{'-remove_title'}) {
3875                 # remove title, i.e. first line of log
3876                 shift @$log;
3877         }
3878         # remove leading empty lines
3879         while (defined $log->[0] && $log->[0] eq "") {
3880                 shift @$log;
3881         }
3882
3883         # print log
3884         my $signoff = 0;
3885         my $empty = 0;
3886         foreach my $line (@$log) {
3887                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3888                         $signoff = 1;
3889                         $empty = 0;
3890                         if (! $opts{'-remove_signoff'}) {
3891                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3892                                 next;
3893                         } else {
3894                                 # remove signoff lines
3895                                 next;
3896                         }
3897                 } else {
3898                         $signoff = 0;
3899                 }
3900
3901                 # print only one empty line
3902                 # do not print empty line after signoff
3903                 if ($line eq "") {
3904                         next if ($empty || $signoff);
3905                         $empty = 1;
3906                 } else {
3907                         $empty = 0;
3908                 }
3909
3910                 print format_log_line_html($line) . "<br/>\n";
3911         }
3912
3913         if ($opts{'-final_empty_line'}) {
3914                 # end with single empty line
3915                 print "<br/>\n" unless $empty;
3916         }
3917 }
3918
3919 # return link target (what link points to)
3920 sub git_get_link_target {
3921         my $hash = shift;
3922         my $link_target;
3923
3924         # read link
3925         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3926                 or return;
3927         {
3928                 local $/ = undef;
3929                 $link_target = <$fd>;
3930         }
3931         close $fd
3932                 or return;
3933
3934         return $link_target;
3935 }
3936
3937 # given link target, and the directory (basedir) the link is in,
3938 # return target of link relative to top directory (top tree);
3939 # return undef if it is not possible (including absolute links).
3940 sub normalize_link_target {
3941         my ($link_target, $basedir) = @_;
3942
3943         # absolute symlinks (beginning with '/') cannot be normalized
3944         return if (substr($link_target, 0, 1) eq '/');
3945
3946         # normalize link target to path from top (root) tree (dir)
3947         my $path;
3948         if ($basedir) {
3949                 $path = $basedir . '/' . $link_target;
3950         } else {
3951                 # we are in top (root) tree (dir)
3952                 $path = $link_target;
3953         }
3954
3955         # remove //, /./, and /../
3956         my @path_parts;
3957         foreach my $part (split('/', $path)) {
3958                 # discard '.' and ''
3959                 next if (!$part || $part eq '.');
3960                 # handle '..'
3961                 if ($part eq '..') {
3962                         if (@path_parts) {
3963                                 pop @path_parts;
3964                         } else {
3965                                 # link leads outside repository (outside top dir)
3966                                 return;
3967                         }
3968                 } else {
3969                         push @path_parts, $part;
3970                 }
3971         }
3972         $path = join('/', @path_parts);
3973
3974         return $path;
3975 }
3976
3977 # print tree entry (row of git_tree), but without encompassing <tr> element
3978 sub git_print_tree_entry {
3979         my ($t, $basedir, $hash_base, $have_blame) = @_;
3980
3981         my %base_key = ();
3982         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3983
3984         # The format of a table row is: mode list link.  Where mode is
3985         # the mode of the entry, list is the name of the entry, an href,
3986         # and link is the action links of the entry.
3987
3988         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3989         if (exists $t->{'size'}) {
3990                 print "<td class=\"size\">$t->{'size'}</td>\n";
3991         }
3992         if ($t->{'type'} eq "blob") {
3993                 print "<td class=\"list\">" .
3994                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3995                                                file_name=>"$basedir$t->{'name'}", %base_key),
3996                                 -class => "list"}, esc_path($t->{'name'}));
3997                 if (S_ISLNK(oct $t->{'mode'})) {
3998                         my $link_target = git_get_link_target($t->{'hash'});
3999                         if ($link_target) {
4000                                 my $norm_target = normalize_link_target($link_target, $basedir);
4001                                 if (defined $norm_target) {
4002                                         print " -> " .
4003                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4004                                                                      file_name=>$norm_target),
4005                                                        -title => $norm_target}, esc_path($link_target));
4006                                 } else {
4007                                         print " -> " . esc_path($link_target);
4008                                 }
4009                         }
4010                 }
4011                 print "</td>\n";
4012                 print "<td class=\"link\">";
4013                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4014                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4015                               "blob");
4016                 if ($have_blame) {
4017                         print " | " .
4018                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4019                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4020                                       "blame");
4021                 }
4022                 if (defined $hash_base) {
4023                         print " | " .
4024                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4025                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4026                                       "history");
4027                 }
4028                 print " | " .
4029                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4030                                                file_name=>"$basedir$t->{'name'}")},
4031                                 "raw");
4032                 print "</td>\n";
4033
4034         } elsif ($t->{'type'} eq "tree") {
4035                 print "<td class=\"list\">";
4036                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4037                                              file_name=>"$basedir$t->{'name'}",
4038                                              %base_key)},
4039                               esc_path($t->{'name'}));
4040                 print "</td>\n";
4041                 print "<td class=\"link\">";
4042                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4043                                              file_name=>"$basedir$t->{'name'}",
4044                                              %base_key)},
4045                               "tree");
4046                 if (defined $hash_base) {
4047                         print " | " .
4048                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4049                                                      file_name=>"$basedir$t->{'name'}")},
4050                                       "history");
4051                 }
4052                 print "</td>\n";
4053         } else {
4054                 # unknown object: we can only present history for it
4055                 # (this includes 'commit' object, i.e. submodule support)
4056                 print "<td class=\"list\">" .
4057                       esc_path($t->{'name'}) .
4058                       "</td>\n";
4059                 print "<td class=\"link\">";
4060                 if (defined $hash_base) {
4061                         print $cgi->a({-href => href(action=>"history",
4062                                                      hash_base=>$hash_base,
4063                                                      file_name=>"$basedir$t->{'name'}")},
4064                                       "history");
4065                 }
4066                 print "</td>\n";
4067         }
4068 }
4069
4070 ## ......................................................................
4071 ## functions printing large fragments of HTML
4072
4073 # get pre-image filenames for merge (combined) diff
4074 sub fill_from_file_info {
4075         my ($diff, @parents) = @_;
4076
4077         $diff->{'from_file'} = [ ];
4078         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4079         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4080                 if ($diff->{'status'}[$i] eq 'R' ||
4081                     $diff->{'status'}[$i] eq 'C') {
4082                         $diff->{'from_file'}[$i] =
4083                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4084                 }
4085         }
4086
4087         return $diff;
4088 }
4089
4090 # is current raw difftree line of file deletion
4091 sub is_deleted {
4092         my $diffinfo = shift;
4093
4094         return $diffinfo->{'to_id'} eq ('0' x 40);
4095 }
4096
4097 # does patch correspond to [previous] difftree raw line
4098 # $diffinfo  - hashref of parsed raw diff format
4099 # $patchinfo - hashref of parsed patch diff format
4100 #              (the same keys as in $diffinfo)
4101 sub is_patch_split {
4102         my ($diffinfo, $patchinfo) = @_;
4103
4104         return defined $diffinfo && defined $patchinfo
4105                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4106 }
4107
4108
4109 sub git_difftree_body {
4110         my ($difftree, $hash, @parents) = @_;
4111         my ($parent) = $parents[0];
4112         my $have_blame = gitweb_check_feature('blame');
4113         print "<div class=\"list_head\">\n";
4114         if ($#{$difftree} > 10) {
4115                 print(($#{$difftree} + 1) . " files changed:\n");
4116         }
4117         print "</div>\n";
4118
4119         print "<table class=\"" .
4120               (@parents > 1 ? "combined " : "") .
4121               "diff_tree\">\n";
4122
4123         # header only for combined diff in 'commitdiff' view
4124         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4125         if ($has_header) {
4126                 # table header
4127                 print "<thead><tr>\n" .
4128                        "<th></th><th></th>\n"; # filename, patchN link
4129                 for (my $i = 0; $i < @parents; $i++) {
4130                         my $par = $parents[$i];
4131                         print "<th>" .
4132                               $cgi->a({-href => href(action=>"commitdiff",
4133                                                      hash=>$hash, hash_parent=>$par),
4134                                        -title => 'commitdiff to parent number ' .
4135                                                   ($i+1) . ': ' . substr($par,0,7)},
4136                                       $i+1) .
4137                               "&nbsp;</th>\n";
4138                 }
4139                 print "</tr></thead>\n<tbody>\n";
4140         }
4141
4142         my $alternate = 1;
4143         my $patchno = 0;
4144         foreach my $line (@{$difftree}) {
4145                 my $diff = parsed_difftree_line($line);
4146
4147                 if ($alternate) {
4148                         print "<tr class=\"dark\">\n";
4149                 } else {
4150                         print "<tr class=\"light\">\n";
4151                 }
4152                 $alternate ^= 1;
4153
4154                 if (exists $diff->{'nparents'}) { # combined diff
4155
4156                         fill_from_file_info($diff, @parents)
4157                                 unless exists $diff->{'from_file'};
4158
4159                         if (!is_deleted($diff)) {
4160                                 # file exists in the result (child) commit
4161                                 print "<td>" .
4162                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4163                                                              file_name=>$diff->{'to_file'},
4164                                                              hash_base=>$hash),
4165                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4166                                       "</td>\n";
4167                         } else {
4168                                 print "<td>" .
4169                                       esc_path($diff->{'to_file'}) .
4170                                       "</td>\n";
4171                         }
4172
4173                         if ($action eq 'commitdiff') {
4174                                 # link to patch
4175                                 $patchno++;
4176                                 print "<td class=\"link\">" .
4177                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4178                                       " | " .
4179                                       "</td>\n";
4180                         }
4181
4182                         my $has_history = 0;
4183                         my $not_deleted = 0;
4184                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4185                                 my $hash_parent = $parents[$i];
4186                                 my $from_hash = $diff->{'from_id'}[$i];
4187                                 my $from_path = $diff->{'from_file'}[$i];
4188                                 my $status = $diff->{'status'}[$i];
4189
4190                                 $has_history ||= ($status ne 'A');
4191                                 $not_deleted ||= ($status ne 'D');
4192
4193                                 if ($status eq 'A') {
4194                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4195                                 } elsif ($status eq 'D') {
4196                                         print "<td class=\"link\">" .
4197                                               $cgi->a({-href => href(action=>"blob",
4198                                                                      hash_base=>$hash,
4199                                                                      hash=>$from_hash,
4200                                                                      file_name=>$from_path)},
4201                                                       "blob" . ($i+1)) .
4202                                               " | </td>\n";
4203                                 } else {
4204                                         if ($diff->{'to_id'} eq $from_hash) {
4205                                                 print "<td class=\"link nochange\">";
4206                                         } else {
4207                                                 print "<td class=\"link\">";
4208                                         }
4209                                         print $cgi->a({-href => href(action=>"blobdiff",
4210                                                                      hash=>$diff->{'to_id'},
4211                                                                      hash_parent=>$from_hash,
4212                                                                      hash_base=>$hash,
4213                                                                      hash_parent_base=>$hash_parent,
4214                                                                      file_name=>$diff->{'to_file'},
4215                                                                      file_parent=>$from_path)},
4216                                                       "diff" . ($i+1)) .
4217                                               " | </td>\n";
4218                                 }
4219                         }
4220
4221                         print "<td class=\"link\">";
4222                         if ($not_deleted) {
4223                                 print $cgi->a({-href => href(action=>"blob",
4224                                                              hash=>$diff->{'to_id'},
4225                                                              file_name=>$diff->{'to_file'},
4226                                                              hash_base=>$hash)},
4227                                               "blob");
4228                                 print " | " if ($has_history);
4229                         }
4230                         if ($has_history) {
4231                                 print $cgi->a({-href => href(action=>"history",
4232                                                              file_name=>$diff->{'to_file'},
4233                                                              hash_base=>$hash)},
4234                                               "history");
4235                         }
4236                         print "</td>\n";
4237
4238                         print "</tr>\n";
4239                         next; # instead of 'else' clause, to avoid extra indent
4240                 }
4241                 # else ordinary diff
4242
4243                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4244                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4245                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4246                         $to_mode_oct = oct $diff->{'to_mode'};
4247                         if (S_ISREG($to_mode_oct)) { # only for regular file
4248                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4249                         }
4250                         $to_file_type = file_type($diff->{'to_mode'});
4251                 }
4252                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4253                         $from_mode_oct = oct $diff->{'from_mode'};
4254                         if (S_ISREG($to_mode_oct)) { # only for regular file
4255                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4256                         }
4257                         $from_file_type = file_type($diff->{'from_mode'});
4258                 }
4259
4260                 if ($diff->{'status'} eq "A") { # created
4261                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4262                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4263                         $mode_chng   .= "]</span>";
4264                         print "<td>";
4265                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4266                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4267                                       -class => "list"}, esc_path($diff->{'file'}));
4268                         print "</td>\n";
4269                         print "<td>$mode_chng</td>\n";
4270                         print "<td class=\"link\">";
4271                         if ($action eq 'commitdiff') {
4272                                 # link to patch
4273                                 $patchno++;
4274                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4275                                 print " | ";
4276                         }
4277                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4278                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4279                                       "blob");
4280                         print "</td>\n";
4281
4282                 } elsif ($diff->{'status'} eq "D") { # deleted
4283                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4284                         print "<td>";
4285                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4286                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4287                                        -class => "list"}, esc_path($diff->{'file'}));
4288                         print "</td>\n";
4289                         print "<td>$mode_chng</td>\n";
4290                         print "<td class=\"link\">";
4291                         if ($action eq 'commitdiff') {
4292                                 # link to patch
4293                                 $patchno++;
4294                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4295                                 print " | ";
4296                         }
4297                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4298                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4299                                       "blob") . " | ";
4300                         if ($have_blame) {
4301                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4302                                                              file_name=>$diff->{'file'})},
4303                                               "blame") . " | ";
4304                         }
4305                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4306                                                      file_name=>$diff->{'file'})},
4307                                       "history");
4308                         print "</td>\n";
4309
4310                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4311                         my $mode_chnge = "";
4312                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4313                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4314                                 if ($from_file_type ne $to_file_type) {
4315                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4316                                 }
4317                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4318                                         if ($from_mode_str && $to_mode_str) {
4319                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4320                                         } elsif ($to_mode_str) {
4321                                                 $mode_chnge .= " mode: $to_mode_str";
4322                                         }
4323                                 }
4324                                 $mode_chnge .= "]</span>\n";
4325                         }
4326                         print "<td>";
4327                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4328                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4329                                       -class => "list"}, esc_path($diff->{'file'}));
4330                         print "</td>\n";
4331                         print "<td>$mode_chnge</td>\n";
4332                         print "<td class=\"link\">";
4333                         if ($action eq 'commitdiff') {
4334                                 # link to patch
4335                                 $patchno++;
4336                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4337                                       " | ";
4338                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4339                                 # "commit" view and modified file (not onlu mode changed)
4340                                 print $cgi->a({-href => href(action=>"blobdiff",
4341                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4342                                                              hash_base=>$hash, hash_parent_base=>$parent,
4343                                                              file_name=>$diff->{'file'})},
4344                                               "diff") .
4345                                       " | ";
4346                         }
4347                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4348                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4349                                        "blob") . " | ";
4350                         if ($have_blame) {
4351                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4352                                                              file_name=>$diff->{'file'})},
4353                                               "blame") . " | ";
4354                         }
4355                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4356                                                      file_name=>$diff->{'file'})},
4357                                       "history");
4358                         print "</td>\n";
4359
4360                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4361                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4362                         my $nstatus = $status_name{$diff->{'status'}};
4363                         my $mode_chng = "";
4364                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4365                                 # mode also for directories, so we cannot use $to_mode_str
4366                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4367                         }
4368                         print "<td>" .
4369                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4370                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4371                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4372                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4373                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4374                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4375                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4376                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4377                               "<td class=\"link\">";
4378                         if ($action eq 'commitdiff') {
4379                                 # link to patch
4380                                 $patchno++;
4381                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4382                                       " | ";
4383                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4384                                 # "commit" view and modified file (not only pure rename or copy)
4385                                 print $cgi->a({-href => href(action=>"blobdiff",
4386                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4387                                                              hash_base=>$hash, hash_parent_base=>$parent,
4388                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4389                                               "diff") .
4390                                       " | ";
4391                         }
4392                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4393                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4394                                       "blob") . " | ";
4395                         if ($have_blame) {
4396                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4397                                                              file_name=>$diff->{'to_file'})},
4398                                               "blame") . " | ";
4399                         }
4400                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4401                                                     file_name=>$diff->{'to_file'})},
4402                                       "history");
4403                         print "</td>\n";
4404
4405                 } # we should not encounter Unmerged (U) or Unknown (X) status
4406                 print "</tr>\n";
4407         }
4408         print "</tbody>" if $has_header;
4409         print "</table>\n";
4410 }
4411
4412 sub git_patchset_body {
4413         my ($fd, $difftree, $hash, @hash_parents) = @_;
4414         my ($hash_parent) = $hash_parents[0];
4415
4416         my $is_combined = (@hash_parents > 1);
4417         my $patch_idx = 0;
4418         my $patch_number = 0;
4419         my $patch_line;
4420         my $diffinfo;
4421         my $to_name;
4422         my (%from, %to);
4423
4424         print "<div class=\"patchset\">\n";
4425
4426         # skip to first patch
4427         while ($patch_line = <$fd>) {
4428                 chomp $patch_line;
4429
4430                 last if ($patch_line =~ m/^diff /);
4431         }
4432
4433  PATCH:
4434         while ($patch_line) {
4435
4436                 # parse "git diff" header line
4437                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4438                         # $1 is from_name, which we do not use
4439                         $to_name = unquote($2);
4440                         $to_name =~ s!^b/!!;
4441                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4442                         # $1 is 'cc' or 'combined', which we do not use
4443                         $to_name = unquote($2);
4444                 } else {
4445                         $to_name = undef;
4446                 }
4447
4448                 # check if current patch belong to current raw line
4449                 # and parse raw git-diff line if needed
4450                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4451                         # this is continuation of a split patch
4452                         print "<div class=\"patch cont\">\n";
4453                 } else {
4454                         # advance raw git-diff output if needed
4455                         $patch_idx++ if defined $diffinfo;
4456
4457                         # read and prepare patch information
4458                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4459
4460                         # compact combined diff output can have some patches skipped
4461                         # find which patch (using pathname of result) we are at now;
4462                         if ($is_combined) {
4463                                 while ($to_name ne $diffinfo->{'to_file'}) {
4464                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4465                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4466                                               "</div>\n";  # class="patch"
4467
4468                                         $patch_idx++;
4469                                         $patch_number++;
4470
4471                                         last if $patch_idx > $#$difftree;
4472                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4473                                 }
4474                         }
4475
4476                         # modifies %from, %to hashes
4477                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4478
4479                         # this is first patch for raw difftree line with $patch_idx index
4480                         # we index @$difftree array from 0, but number patches from 1
4481                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4482                 }
4483
4484                 # git diff header
4485                 #assert($patch_line =~ m/^diff /) if DEBUG;
4486                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4487                 $patch_number++;
4488                 # print "git diff" header
4489                 print format_git_diff_header_line($patch_line, $diffinfo,
4490                                                   \%from, \%to);
4491
4492                 # print extended diff header
4493                 print "<div class=\"diff extended_header\">\n";
4494         EXTENDED_HEADER:
4495                 while ($patch_line = <$fd>) {
4496                         chomp $patch_line;
4497
4498                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4499
4500                         print format_extended_diff_header_line($patch_line, $diffinfo,
4501                                                                \%from, \%to);
4502                 }
4503                 print "</div>\n"; # class="diff extended_header"
4504
4505                 # from-file/to-file diff header
4506                 if (! $patch_line) {
4507                         print "</div>\n"; # class="patch"
4508                         last PATCH;
4509                 }
4510                 next PATCH if ($patch_line =~ m/^diff /);
4511                 #assert($patch_line =~ m/^---/) if DEBUG;
4512
4513                 my $last_patch_line = $patch_line;
4514                 $patch_line = <$fd>;
4515                 chomp $patch_line;
4516                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4517
4518                 print format_diff_from_to_header($last_patch_line, $patch_line,
4519                                                  $diffinfo, \%from, \%to,
4520                                                  @hash_parents);
4521
4522                 # the patch itself
4523         LINE:
4524                 while ($patch_line = <$fd>) {
4525                         chomp $patch_line;
4526
4527                         next PATCH if ($patch_line =~ m/^diff /);
4528
4529                         print format_diff_line($patch_line, \%from, \%to);
4530                 }
4531
4532         } continue {
4533                 print "</div>\n"; # class="patch"
4534         }
4535
4536         # for compact combined (--cc) format, with chunk and patch simplification
4537         # the patchset might be empty, but there might be unprocessed raw lines
4538         for (++$patch_idx if $patch_number > 0;
4539              $patch_idx < @$difftree;
4540              ++$patch_idx) {
4541                 # read and prepare patch information
4542                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4543
4544                 # generate anchor for "patch" links in difftree / whatchanged part
4545                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4546                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4547                       "</div>\n";  # class="patch"
4548
4549                 $patch_number++;
4550         }
4551
4552         if ($patch_number == 0) {
4553                 if (@hash_parents > 1) {
4554                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4555                 } else {
4556                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4557                 }
4558         }
4559
4560         print "</div>\n"; # class="patchset"
4561 }
4562
4563 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4564
4565 # fills project list info (age, description, owner, forks) for each
4566 # project in the list, removing invalid projects from returned list
4567 # NOTE: modifies $projlist, but does not remove entries from it
4568 sub fill_project_list_info {
4569         my ($projlist, $check_forks) = @_;
4570         my @projects;
4571
4572         my $show_ctags = gitweb_check_feature('ctags');
4573  PROJECT:
4574         foreach my $pr (@$projlist) {
4575                 my (@activity) = git_get_last_activity($pr->{'path'});
4576                 unless (@activity) {
4577                         next PROJECT;
4578                 }
4579                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4580                 if (!defined $pr->{'descr'}) {
4581                         my $descr = git_get_project_description($pr->{'path'}) || "";
4582                         $descr = to_utf8($descr);
4583                         $pr->{'descr_long'} = $descr;
4584                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4585                 }
4586                 if (!defined $pr->{'owner'}) {
4587                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4588                 }
4589                 if ($check_forks) {
4590                         my $pname = $pr->{'path'};
4591                         if (($pname =~ s/\.git$//) &&
4592                             ($pname !~ /\/$/) &&
4593                             (-d "$projectroot/$pname")) {
4594                                 $pr->{'forks'} = "-d $projectroot/$pname";
4595                         } else {
4596                                 $pr->{'forks'} = 0;
4597                         }
4598                 }
4599                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4600                 push @projects, $pr;
4601         }
4602
4603         return @projects;
4604 }
4605
4606 # print 'sort by' <th> element, generating 'sort by $name' replay link
4607 # if that order is not selected
4608 sub print_sort_th {
4609         print format_sort_th(@_);
4610 }
4611
4612 sub format_sort_th {
4613         my ($name, $order, $header) = @_;
4614         my $sort_th = "";
4615         $header ||= ucfirst($name);
4616
4617         if ($order eq $name) {
4618                 $sort_th .= "<th>$header</th>\n";
4619         } else {
4620                 $sort_th .= "<th>" .
4621                             $cgi->a({-href => href(-replay=>1, order=>$name),
4622                                      -class => "header"}, $header) .
4623                             "</th>\n";
4624         }
4625
4626         return $sort_th;
4627 }
4628
4629 sub git_project_list_body {
4630         # actually uses global variable $project
4631         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4632
4633         my $check_forks = gitweb_check_feature('forks');
4634         my @projects = fill_project_list_info($projlist, $check_forks);
4635
4636         $order ||= $default_projects_order;
4637         $from = 0 unless defined $from;
4638         $to = $#projects if (!defined $to || $#projects < $to);
4639
4640         my %order_info = (
4641                 project => { key => 'path', type => 'str' },
4642                 descr => { key => 'descr_long', type => 'str' },
4643                 owner => { key => 'owner', type => 'str' },
4644                 age => { key => 'age', type => 'num' }
4645         );
4646         my $oi = $order_info{$order};
4647         if ($oi->{'type'} eq 'str') {
4648                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4649         } else {
4650                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4651         }
4652
4653         my $show_ctags = gitweb_check_feature('ctags');
4654         if ($show_ctags) {
4655                 my %ctags;
4656                 foreach my $p (@projects) {
4657                         foreach my $ct (keys %{$p->{'ctags'}}) {
4658                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4659                         }
4660                 }
4661                 my $cloud = git_populate_project_tagcloud(\%ctags);
4662                 print git_show_project_tagcloud($cloud, 64);
4663         }
4664
4665         print "<table class=\"project_list\">\n";
4666         unless ($no_header) {
4667                 print "<tr>\n";
4668                 if ($check_forks) {
4669                         print "<th></th>\n";
4670                 }
4671                 print_sort_th('project', $order, 'Project');
4672                 print_sort_th('descr', $order, 'Description');
4673                 print_sort_th('owner', $order, 'Owner');
4674                 print_sort_th('age', $order, 'Last Change');
4675                 print "<th></th>\n" . # for links
4676                       "</tr>\n";
4677         }
4678         my $alternate = 1;
4679         my $tagfilter = $cgi->param('by_tag');
4680         for (my $i = $from; $i <= $to; $i++) {
4681                 my $pr = $projects[$i];
4682
4683                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4684                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4685                         and not $pr->{'descr_long'} =~ /$searchtext/;
4686                 # Weed out forks or non-matching entries of search
4687                 if ($check_forks) {
4688                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4689                         $forkbase="^$forkbase" if $forkbase;
4690                         next if not $searchtext and not $tagfilter and $show_ctags
4691                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4692                 }
4693
4694                 if ($alternate) {
4695                         print "<tr class=\"dark\">\n";
4696                 } else {
4697                         print "<tr class=\"light\">\n";
4698                 }
4699                 $alternate ^= 1;
4700                 if ($check_forks) {
4701                         print "<td>";
4702                         if ($pr->{'forks'}) {
4703                                 print "<!-- $pr->{'forks'} -->\n";
4704                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4705                         }
4706                         print "</td>\n";
4707                 }
4708                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4709                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4710                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4711                                         -class => "list", -title => $pr->{'descr_long'}},
4712                                         esc_html($pr->{'descr'})) . "</td>\n" .
4713                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4714                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4715                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4716                       "<td class=\"link\">" .
4717                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4718                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4719                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4720                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4721                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4722                       "</td>\n" .
4723                       "</tr>\n";
4724         }
4725         if (defined $extra) {
4726                 print "<tr>\n";
4727                 if ($check_forks) {
4728                         print "<td></td>\n";
4729                 }
4730                 print "<td colspan=\"5\">$extra</td>\n" .
4731                       "</tr>\n";
4732         }
4733         print "</table>\n";
4734 }
4735
4736 sub git_log_body {
4737         # uses global variable $project
4738         my ($commitlist, $from, $to, $refs, $extra) = @_;
4739
4740         $from = 0 unless defined $from;
4741         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4742
4743         for (my $i = 0; $i <= $to; $i++) {
4744                 my %co = %{$commitlist->[$i]};
4745                 next if !%co;
4746                 my $commit = $co{'id'};
4747                 my $ref = format_ref_marker($refs, $commit);
4748                 my %ad = parse_date($co{'author_epoch'});
4749                 git_print_header_div('commit',
4750                                "<span class=\"age\">$co{'age_string'}</span>" .
4751                                esc_html($co{'title'}) . $ref,
4752                                $commit);
4753                 print "<div class=\"title_text\">\n" .
4754                       "<div class=\"log_link\">\n" .
4755                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4756                       " | " .
4757                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4758                       " | " .
4759                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4760                       "<br/>\n" .
4761                       "</div>\n";
4762                       git_print_authorship(\%co, -tag => 'span');
4763                       print "<br/>\n</div>\n";
4764
4765                 print "<div class=\"log_body\">\n";
4766                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4767                 print "</div>\n";
4768         }
4769         if ($extra) {
4770                 print "<div class=\"page_nav\">\n";
4771                 print "$extra\n";
4772                 print "</div>\n";
4773         }
4774 }
4775
4776 sub git_shortlog_body {
4777         # uses global variable $project
4778         my ($commitlist, $from, $to, $refs, $extra) = @_;
4779
4780         $from = 0 unless defined $from;
4781         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4782
4783         print "<table class=\"shortlog\">\n";
4784         my $alternate = 1;
4785         for (my $i = $from; $i <= $to; $i++) {
4786                 my %co = %{$commitlist->[$i]};
4787                 my $commit = $co{'id'};
4788                 my $ref = format_ref_marker($refs, $commit);
4789                 if ($alternate) {
4790                         print "<tr class=\"dark\">\n";
4791                 } else {
4792                         print "<tr class=\"light\">\n";
4793                 }
4794                 $alternate ^= 1;
4795                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4796                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4797                       format_author_html('td', \%co, 10) . "<td>";
4798                 print format_subject_html($co{'title'}, $co{'title_short'},
4799                                           href(action=>"commit", hash=>$commit), $ref);
4800                 print "</td>\n" .
4801                       "<td class=\"link\">" .
4802                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4803                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4804                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4805                 my $snapshot_links = format_snapshot_links($commit);
4806                 if (defined $snapshot_links) {
4807                         print " | " . $snapshot_links;
4808                 }
4809                 print "</td>\n" .
4810                       "</tr>\n";
4811         }
4812         if (defined $extra) {
4813                 print "<tr>\n" .
4814                       "<td colspan=\"4\">$extra</td>\n" .
4815                       "</tr>\n";
4816         }
4817         print "</table>\n";
4818 }
4819
4820 sub git_history_body {
4821         # Warning: assumes constant type (blob or tree) during history
4822         my ($commitlist, $from, $to, $refs, $extra,
4823             $file_name, $file_hash, $ftype) = @_;
4824
4825         $from = 0 unless defined $from;
4826         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4827
4828         print "<table class=\"history\">\n";
4829         my $alternate = 1;
4830         for (my $i = $from; $i <= $to; $i++) {
4831                 my %co = %{$commitlist->[$i]};
4832                 if (!%co) {
4833                         next;
4834                 }
4835                 my $commit = $co{'id'};
4836
4837                 my $ref = format_ref_marker($refs, $commit);
4838
4839                 if ($alternate) {
4840                         print "<tr class=\"dark\">\n";
4841                 } else {
4842                         print "<tr class=\"light\">\n";
4843                 }
4844                 $alternate ^= 1;
4845                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4846         # shortlog:   format_author_html('td', \%co, 10)
4847                       format_author_html('td', \%co, 15, 3) . "<td>";
4848                 # originally git_history used chop_str($co{'title'}, 50)
4849                 print format_subject_html($co{'title'}, $co{'title_short'},
4850                                           href(action=>"commit", hash=>$commit), $ref);
4851                 print "</td>\n" .
4852                       "<td class=\"link\">" .
4853                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4854                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4855
4856                 if ($ftype eq 'blob') {
4857                         my $blob_current = $file_hash;
4858                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4859                         if (defined $blob_current && defined $blob_parent &&
4860                                         $blob_current ne $blob_parent) {
4861                                 print " | " .
4862                                         $cgi->a({-href => href(action=>"blobdiff",
4863                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4864                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4865                                                                file_name=>$file_name)},
4866                                                 "diff to current");
4867                         }
4868                 }
4869                 print "</td>\n" .
4870                       "</tr>\n";
4871         }
4872         if (defined $extra) {
4873                 print "<tr>\n" .
4874                       "<td colspan=\"4\">$extra</td>\n" .
4875                       "</tr>\n";
4876         }
4877         print "</table>\n";
4878 }
4879
4880 sub git_tags_body {
4881         # uses global variable $project
4882         my ($taglist, $from, $to, $extra) = @_;
4883         $from = 0 unless defined $from;
4884         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4885
4886         print "<table class=\"tags\">\n";
4887         my $alternate = 1;
4888         for (my $i = $from; $i <= $to; $i++) {
4889                 my $entry = $taglist->[$i];
4890                 my %tag = %$entry;
4891                 my $comment = $tag{'subject'};
4892                 my $comment_short;
4893                 if (defined $comment) {
4894                         $comment_short = chop_str($comment, 30, 5);
4895                 }
4896                 if ($alternate) {
4897                         print "<tr class=\"dark\">\n";
4898                 } else {
4899                         print "<tr class=\"light\">\n";
4900                 }
4901                 $alternate ^= 1;
4902                 if (defined $tag{'age'}) {
4903                         print "<td><i>$tag{'age'}</i></td>\n";
4904                 } else {
4905                         print "<td></td>\n";
4906                 }
4907                 print "<td>" .
4908                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4909                                -class => "list name"}, esc_html($tag{'name'})) .
4910                       "</td>\n" .
4911                       "<td>";
4912                 if (defined $comment) {
4913                         print format_subject_html($comment, $comment_short,
4914                                                   href(action=>"tag", hash=>$tag{'id'}));
4915                 }
4916                 print "</td>\n" .
4917                       "<td class=\"selflink\">";
4918                 if ($tag{'type'} eq "tag") {
4919                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4920                 } else {
4921                         print "&nbsp;";
4922                 }
4923                 print "</td>\n" .
4924                       "<td class=\"link\">" . " | " .
4925                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4926                 if ($tag{'reftype'} eq "commit") {
4927                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4928                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4929                 } elsif ($tag{'reftype'} eq "blob") {
4930                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4931                 }
4932                 print "</td>\n" .
4933                       "</tr>";
4934         }
4935         if (defined $extra) {
4936                 print "<tr>\n" .
4937                       "<td colspan=\"5\">$extra</td>\n" .
4938                       "</tr>\n";
4939         }
4940         print "</table>\n";
4941 }
4942
4943 sub git_heads_body {
4944         # uses global variable $project
4945         my ($headlist, $head, $from, $to, $extra) = @_;
4946         $from = 0 unless defined $from;
4947         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4948
4949         print "<table class=\"heads\">\n";
4950         my $alternate = 1;
4951         for (my $i = $from; $i <= $to; $i++) {
4952                 my $entry = $headlist->[$i];
4953                 my %ref = %$entry;
4954                 my $curr = $ref{'id'} eq $head;
4955                 if ($alternate) {
4956                         print "<tr class=\"dark\">\n";
4957                 } else {
4958                         print "<tr class=\"light\">\n";
4959                 }
4960                 $alternate ^= 1;
4961                 print "<td><i>$ref{'age'}</i></td>\n" .
4962                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4963                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4964                                -class => "list name"},esc_html($ref{'name'})) .
4965                       "</td>\n" .
4966                       "<td class=\"link\">" .
4967                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4968                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4969                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4970                       "</td>\n" .
4971                       "</tr>";
4972         }
4973         if (defined $extra) {
4974                 print "<tr>\n" .
4975                       "<td colspan=\"3\">$extra</td>\n" .
4976                       "</tr>\n";
4977         }
4978         print "</table>\n";
4979 }
4980
4981 sub git_search_grep_body {
4982         my ($commitlist, $from, $to, $extra) = @_;
4983         $from = 0 unless defined $from;
4984         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4985
4986         print "<table class=\"commit_search\">\n";
4987         my $alternate = 1;
4988         for (my $i = $from; $i <= $to; $i++) {
4989                 my %co = %{$commitlist->[$i]};
4990                 if (!%co) {
4991                         next;
4992                 }
4993                 my $commit = $co{'id'};
4994                 if ($alternate) {
4995                         print "<tr class=\"dark\">\n";
4996                 } else {
4997                         print "<tr class=\"light\">\n";
4998                 }
4999                 $alternate ^= 1;
5000                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5001                       format_author_html('td', \%co, 15, 5) .
5002                       "<td>" .
5003                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5004                                -class => "list subject"},
5005                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5006                 my $comment = $co{'comment'};
5007                 foreach my $line (@$comment) {
5008                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5009                                 my ($lead, $match, $trail) = ($1, $2, $3);
5010                                 $match = chop_str($match, 70, 5, 'center');
5011                                 my $contextlen = int((80 - length($match))/2);
5012                                 $contextlen = 30 if ($contextlen > 30);
5013                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5014                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5015
5016                                 $lead  = esc_html($lead);
5017                                 $match = esc_html($match);
5018                                 $trail = esc_html($trail);
5019
5020                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5021                         }
5022                 }
5023                 print "</td>\n" .
5024                       "<td class=\"link\">" .
5025                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5026                       " | " .
5027                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5028                       " | " .
5029                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5030                 print "</td>\n" .
5031                       "</tr>\n";
5032         }
5033         if (defined $extra) {
5034                 print "<tr>\n" .
5035                       "<td colspan=\"3\">$extra</td>\n" .
5036                       "</tr>\n";
5037         }
5038         print "</table>\n";
5039 }
5040
5041 ## ======================================================================
5042 ## ======================================================================
5043 ## actions
5044
5045 sub git_project_list {
5046         my $order = $input_params{'order'};
5047         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5048                 die_error(400, "Unknown order parameter");
5049         }
5050
5051         my @list = git_get_projects_list();
5052         if (!@list) {
5053                 die_error(404, "No projects found");
5054         }
5055
5056         git_header_html();
5057         if (defined $home_text && -f $home_text) {
5058                 print "<div class=\"index_include\">\n";
5059                 insert_file($home_text);
5060                 print "</div>\n";
5061         }
5062         print $cgi->startform(-method => "get") .
5063               "<p class=\"projsearch\">Search:\n" .
5064               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5065               "</p>" .
5066               $cgi->end_form() . "\n";
5067         git_project_list_body(\@list, $order);
5068         git_footer_html();
5069 }
5070
5071 sub git_forks {
5072         my $order = $input_params{'order'};
5073         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5074                 die_error(400, "Unknown order parameter");
5075         }
5076
5077         my @list = git_get_projects_list($project);
5078         if (!@list) {
5079                 die_error(404, "No forks found");
5080         }
5081
5082         git_header_html();
5083         git_print_page_nav('','');
5084         git_print_header_div('summary', "$project forks");
5085         git_project_list_body(\@list, $order);
5086         git_footer_html();
5087 }
5088
5089 sub git_project_index {
5090         my @projects = git_get_projects_list($project);
5091
5092         print $cgi->header(
5093                 -type => 'text/plain',
5094                 -charset => 'utf-8',
5095                 -content_disposition => 'inline; filename="index.aux"');
5096
5097         foreach my $pr (@projects) {
5098                 if (!exists $pr->{'owner'}) {
5099                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5100                 }
5101
5102                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5103                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5104                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5105                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5106                 $path  =~ s/ /\+/g;
5107                 $owner =~ s/ /\+/g;
5108
5109                 print "$path $owner\n";
5110         }
5111 }
5112
5113 sub git_summary {
5114         my $descr = git_get_project_description($project) || "none";
5115         my %co = parse_commit("HEAD");
5116         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5117         my $head = $co{'id'};
5118
5119         my $owner = git_get_project_owner($project);
5120
5121         my $refs = git_get_references();
5122         # These get_*_list functions return one more to allow us to see if
5123         # there are more ...
5124         my @taglist  = git_get_tags_list(16);
5125         my @headlist = git_get_heads_list(16);
5126         my @forklist;
5127         my $check_forks = gitweb_check_feature('forks');
5128
5129         if ($check_forks) {
5130                 @forklist = git_get_projects_list($project);
5131         }
5132
5133         git_header_html();
5134         git_print_page_nav('summary','', $head);
5135
5136         print "<div class=\"title\">&nbsp;</div>\n";
5137         print "<table class=\"projects_list\">\n" .
5138               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5139               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5140         if (defined $cd{'rfc2822'}) {
5141                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5142         }
5143
5144         # use per project git URL list in $projectroot/$project/cloneurl
5145         # or make project git URL from git base URL and project name
5146         my $url_tag = "URL";
5147         my @url_list = git_get_project_url_list($project);
5148         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5149         foreach my $git_url (@url_list) {
5150                 next unless $git_url;
5151                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5152                 $url_tag = "";
5153         }
5154
5155         # Tag cloud
5156         my $show_ctags = gitweb_check_feature('ctags');
5157         if ($show_ctags) {
5158                 my $ctags = git_get_project_ctags($project);
5159                 my $cloud = git_populate_project_tagcloud($ctags);
5160                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5161                 print "</td>\n<td>" unless %$ctags;
5162                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5163                 print "</td>\n<td>" if %$ctags;
5164                 print git_show_project_tagcloud($cloud, 48);
5165                 print "</td></tr>";
5166         }
5167
5168         print "</table>\n";
5169
5170         # If XSS prevention is on, we don't include README.html.
5171         # TODO: Allow a readme in some safe format.
5172         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5173                 print "<div class=\"title\">readme</div>\n" .
5174                       "<div class=\"readme\">\n";
5175                 insert_file("$projectroot/$project/README.html");
5176                 print "\n</div>\n"; # class="readme"
5177         }
5178
5179         # we need to request one more than 16 (0..15) to check if
5180         # those 16 are all
5181         my @commitlist = $head ? parse_commits($head, 17) : ();
5182         if (@commitlist) {
5183                 git_print_header_div('shortlog');
5184                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5185                                   $#commitlist <=  15 ? undef :
5186                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5187         }
5188
5189         if (@taglist) {
5190                 git_print_header_div('tags');
5191                 git_tags_body(\@taglist, 0, 15,
5192                               $#taglist <=  15 ? undef :
5193                               $cgi->a({-href => href(action=>"tags")}, "..."));
5194         }
5195
5196         if (@headlist) {
5197                 git_print_header_div('heads');
5198                 git_heads_body(\@headlist, $head, 0, 15,
5199                                $#headlist <= 15 ? undef :
5200                                $cgi->a({-href => href(action=>"heads")}, "..."));
5201         }
5202
5203         if (@forklist) {
5204                 git_print_header_div('forks');
5205                 git_project_list_body(\@forklist, 'age', 0, 15,
5206                                       $#forklist <= 15 ? undef :
5207                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5208                                       'no_header');
5209         }
5210
5211         git_footer_html();
5212 }
5213
5214 sub git_tag {
5215         my %tag = parse_tag($hash);
5216
5217         if (! %tag) {
5218                 die_error(404, "Unknown tag object");
5219         }
5220
5221         my $head = git_get_head_hash($project);
5222         git_header_html();
5223         git_print_page_nav('','', $head,undef,$head);
5224         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5225         print "<div class=\"title_text\">\n" .
5226               "<table class=\"object_header\">\n" .
5227               "<tr>\n" .
5228               "<td>object</td>\n" .
5229               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5230                                $tag{'object'}) . "</td>\n" .
5231               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5232                                               $tag{'type'}) . "</td>\n" .
5233               "</tr>\n";
5234         if (defined($tag{'author'})) {
5235                 git_print_authorship_rows(\%tag, 'author');
5236         }
5237         print "</table>\n\n" .
5238               "</div>\n";
5239         print "<div class=\"page_body\">";
5240         my $comment = $tag{'comment'};
5241         foreach my $line (@$comment) {
5242                 chomp $line;
5243                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5244         }
5245         print "</div>\n";
5246         git_footer_html();
5247 }
5248
5249 sub git_blame_common {
5250         my $format = shift || 'porcelain';
5251         if ($format eq 'porcelain' && $cgi->param('js')) {
5252                 $format = 'incremental';
5253                 $action = 'blame_incremental'; # for page title etc
5254         }
5255
5256         # permissions
5257         gitweb_check_feature('blame')
5258                 or die_error(403, "Blame view not allowed");
5259
5260         # error checking
5261         die_error(400, "No file name given") unless $file_name;
5262         $hash_base ||= git_get_head_hash($project);
5263         die_error(404, "Couldn't find base commit") unless $hash_base;
5264         my %co = parse_commit($hash_base)
5265                 or die_error(404, "Commit not found");
5266         my $ftype = "blob";
5267         if (!defined $hash) {
5268                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5269                         or die_error(404, "Error looking up file");
5270         } else {
5271                 $ftype = git_get_type($hash);
5272                 if ($ftype !~ "blob") {
5273                         die_error(400, "Object is not a blob");
5274                 }
5275         }
5276
5277         my $fd;
5278         if ($format eq 'incremental') {
5279                 # get file contents (as base)
5280                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5281                         or die_error(500, "Open git-cat-file failed");
5282         } elsif ($format eq 'data') {
5283                 # run git-blame --incremental
5284                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5285                         $hash_base, "--", $file_name
5286                         or die_error(500, "Open git-blame --incremental failed");
5287         } else {
5288                 # run git-blame --porcelain
5289                 open $fd, "-|", git_cmd(), "blame", '-p',
5290                         $hash_base, '--', $file_name
5291                         or die_error(500, "Open git-blame --porcelain failed");
5292         }
5293
5294         # incremental blame data returns early
5295         if ($format eq 'data') {
5296                 print $cgi->header(
5297                         -type=>"text/plain", -charset => "utf-8",
5298                         -status=> "200 OK");
5299                 local $| = 1; # output autoflush
5300                 print while <$fd>;
5301                 close $fd
5302                         or print "ERROR $!\n";
5303
5304                 print 'END';
5305                 if (defined $t0 && gitweb_check_feature('timed')) {
5306                         print ' '.
5307                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5308                               ' '.$number_of_git_cmds;
5309                 }
5310                 print "\n";
5311
5312                 return;
5313         }
5314
5315         # page header
5316         git_header_html();
5317         my $formats_nav =
5318                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5319                         "blob") .
5320                 " | ";
5321         if ($format eq 'incremental') {
5322                 $formats_nav .=
5323                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5324                                 "blame") . " (non-incremental)";
5325         } else {
5326                 $formats_nav .=
5327                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5328                                 "blame") . " (incremental)";
5329         }
5330         $formats_nav .=
5331                 " | " .
5332                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5333                         "history") .
5334                 " | " .
5335                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5336                         "HEAD");
5337         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5338         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5339         git_print_page_path($file_name, $ftype, $hash_base);
5340
5341         # page body
5342         if ($format eq 'incremental') {
5343                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5344                       "This page requires JavaScript to run.\n Use ".
5345                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5346                               'this page').
5347                       " instead.\n".
5348                       "</b></center></div>\n</noscript>\n";
5349
5350                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5351         }
5352
5353         print qq!<div class="page_body">\n!;
5354         print qq!<div id="progress_info">... / ...</div>\n!
5355                 if ($format eq 'incremental');
5356         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5357               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5358               qq!<thead>\n!.
5359               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5360               qq!</thead>\n!.
5361               qq!<tbody>\n!;
5362
5363         my @rev_color = qw(light dark);
5364         my $num_colors = scalar(@rev_color);
5365         my $current_color = 0;
5366
5367         if ($format eq 'incremental') {
5368                 my $color_class = $rev_color[$current_color];
5369
5370                 #contents of a file
5371                 my $linenr = 0;
5372         LINE:
5373                 while (my $line = <$fd>) {
5374                         chomp $line;
5375                         $linenr++;
5376
5377                         print qq!<tr id="l$linenr" class="$color_class">!.
5378                               qq!<td class="sha1"><a href=""> </a></td>!.
5379                               qq!<td class="linenr">!.
5380                               qq!<a class="linenr" href="">$linenr</a></td>!;
5381                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5382                         print qq!</tr>\n!;
5383                 }
5384
5385         } else { # porcelain, i.e. ordinary blame
5386                 my %metainfo = (); # saves information about commits
5387
5388                 # blame data
5389         LINE:
5390                 while (my $line = <$fd>) {
5391                         chomp $line;
5392                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5393                         # no <lines in group> for subsequent lines in group of lines
5394                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5395                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5396                         if (!exists $metainfo{$full_rev}) {
5397                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5398                         }
5399                         my $meta = $metainfo{$full_rev};
5400                         my $data;
5401                         while ($data = <$fd>) {
5402                                 chomp $data;
5403                                 last if ($data =~ s/^\t//); # contents of line
5404                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5405                                         $meta->{$1} = $2 unless exists $meta->{$1};
5406                                 }
5407                                 if ($data =~ /^previous /) {
5408                                         $meta->{'nprevious'}++;
5409                                 }
5410                         }
5411                         my $short_rev = substr($full_rev, 0, 8);
5412                         my $author = $meta->{'author'};
5413                         my %date =
5414                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5415                         my $date = $date{'iso-tz'};
5416                         if ($group_size) {
5417                                 $current_color = ($current_color + 1) % $num_colors;
5418                         }
5419                         my $tr_class = $rev_color[$current_color];
5420                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5421                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5422                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5423                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5424                         if ($group_size) {
5425                                 print "<td class=\"sha1\"";
5426                                 print " title=\"". esc_html($author) . ", $date\"";
5427                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5428                                 print ">";
5429                                 print $cgi->a({-href => href(action=>"commit",
5430                                                              hash=>$full_rev,
5431                                                              file_name=>$file_name)},
5432                                               esc_html($short_rev));
5433                                 if ($group_size >= 2) {
5434                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5435                                         if (@author_initials) {
5436                                                 print "<br />" .
5437                                                       esc_html(join('', @author_initials));
5438                                                 #           or join('.', ...)
5439                                         }
5440                                 }
5441                                 print "</td>\n";
5442                         }
5443                         # 'previous' <sha1 of parent commit> <filename at commit>
5444                         if (exists $meta->{'previous'} &&
5445                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5446                                 $meta->{'parent'} = $1;
5447                                 $meta->{'file_parent'} = unquote($2);
5448                         }
5449                         my $linenr_commit =
5450                                 exists($meta->{'parent'}) ?
5451                                 $meta->{'parent'} : $full_rev;
5452                         my $linenr_filename =
5453                                 exists($meta->{'file_parent'}) ?
5454                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5455                         my $blamed = href(action => 'blame',
5456                                           file_name => $linenr_filename,
5457                                           hash_base => $linenr_commit);
5458                         print "<td class=\"linenr\">";
5459                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5460                                         -class => "linenr" },
5461                                       esc_html($lineno));
5462                         print "</td>";
5463                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5464                         print "</tr>\n";
5465                 } # end while
5466
5467         }
5468
5469         # footer
5470         print "</tbody>\n".
5471               "</table>\n"; # class="blame"
5472         print "</div>\n";   # class="blame_body"
5473         close $fd
5474                 or print "Reading blob failed\n";
5475
5476         git_footer_html();
5477 }
5478
5479 sub git_blame {
5480         git_blame_common();
5481 }
5482
5483 sub git_blame_incremental {
5484         git_blame_common('incremental');
5485 }
5486
5487 sub git_blame_data {
5488         git_blame_common('data');
5489 }
5490
5491 sub git_tags {
5492         my $head = git_get_head_hash($project);
5493         git_header_html();
5494         git_print_page_nav('','', $head,undef,$head);
5495         git_print_header_div('summary', $project);
5496
5497         my @tagslist = git_get_tags_list();
5498         if (@tagslist) {
5499                 git_tags_body(\@tagslist);
5500         }
5501         git_footer_html();
5502 }
5503
5504 sub git_heads {
5505         my $head = git_get_head_hash($project);
5506         git_header_html();
5507         git_print_page_nav('','', $head,undef,$head);
5508         git_print_header_div('summary', $project);
5509
5510         my @headslist = git_get_heads_list();
5511         if (@headslist) {
5512                 git_heads_body(\@headslist, $head);
5513         }
5514         git_footer_html();
5515 }
5516
5517 sub git_blob_plain {
5518         my $type = shift;
5519         my $expires;
5520
5521         if (!defined $hash) {
5522                 if (defined $file_name) {
5523                         my $base = $hash_base || git_get_head_hash($project);
5524                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5525                                 or die_error(404, "Cannot find file");
5526                 } else {
5527                         die_error(400, "No file name defined");
5528                 }
5529         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5530                 # blobs defined by non-textual hash id's can be cached
5531                 $expires = "+1d";
5532         }
5533
5534         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5535                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5536
5537         # content-type (can include charset)
5538         $type = blob_contenttype($fd, $file_name, $type);
5539
5540         # "save as" filename, even when no $file_name is given
5541         my $save_as = "$hash";
5542         if (defined $file_name) {
5543                 $save_as = $file_name;
5544         } elsif ($type =~ m/^text\//) {
5545                 $save_as .= '.txt';
5546         }
5547
5548         # With XSS prevention on, blobs of all types except a few known safe
5549         # ones are served with "Content-Disposition: attachment" to make sure
5550         # they don't run in our security domain.  For certain image types,
5551         # blob view writes an <img> tag referring to blob_plain view, and we
5552         # want to be sure not to break that by serving the image as an
5553         # attachment (though Firefox 3 doesn't seem to care).
5554         my $sandbox = $prevent_xss &&
5555                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5556
5557         print $cgi->header(
5558                 -type => $type,
5559                 -expires => $expires,
5560                 -content_disposition =>
5561                         ($sandbox ? 'attachment' : 'inline')
5562                         . '; filename="' . $save_as . '"');
5563         local $/ = undef;
5564         binmode STDOUT, ':raw';
5565         print <$fd>;
5566         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5567         close $fd;
5568 }
5569
5570 sub git_blob {
5571         my $expires;
5572
5573         if (!defined $hash) {
5574                 if (defined $file_name) {
5575                         my $base = $hash_base || git_get_head_hash($project);
5576                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5577                                 or die_error(404, "Cannot find file");
5578                 } else {
5579                         die_error(400, "No file name defined");
5580                 }
5581         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5582                 # blobs defined by non-textual hash id's can be cached
5583                 $expires = "+1d";
5584         }
5585
5586         my $have_blame = gitweb_check_feature('blame');
5587         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5588                 or die_error(500, "Couldn't cat $file_name, $hash");
5589         my $mimetype = blob_mimetype($fd, $file_name);
5590         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5591         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5592                 close $fd;
5593                 return git_blob_plain($mimetype);
5594         }
5595         # we can have blame only for text/* mimetype
5596         $have_blame &&= ($mimetype =~ m!^text/!);
5597
5598         my $highlight = gitweb_check_feature('highlight');
5599         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5600         $fd = run_highlighter($fd, $highlight, $syntax)
5601                 if $syntax;
5602
5603         git_header_html(undef, $expires);
5604         my $formats_nav = '';
5605         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5606                 if (defined $file_name) {
5607                         if ($have_blame) {
5608                                 $formats_nav .=
5609                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5610                                                 "blame") .
5611                                         " | ";
5612                         }
5613                         $formats_nav .=
5614                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5615                                         "history") .
5616                                 " | " .
5617                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5618                                         "raw") .
5619                                 " | " .
5620                                 $cgi->a({-href => href(action=>"blob",
5621                                                        hash_base=>"HEAD", file_name=>$file_name)},
5622                                         "HEAD");
5623                 } else {
5624                         $formats_nav .=
5625                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5626                                         "raw");
5627                 }
5628                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5629                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5630         } else {
5631                 print "<div class=\"page_nav\">\n" .
5632                       "<br/><br/></div>\n" .
5633                       "<div class=\"title\">$hash</div>\n";
5634         }
5635         git_print_page_path($file_name, "blob", $hash_base);
5636         print "<div class=\"page_body\">\n";
5637         if ($mimetype =~ m!^image/!) {
5638                 print qq!<img type="$mimetype"!;
5639                 if ($file_name) {
5640                         print qq! alt="$file_name" title="$file_name"!;
5641                 }
5642                 print qq! src="! .
5643                       href(action=>"blob_plain", hash=>$hash,
5644                            hash_base=>$hash_base, file_name=>$file_name) .
5645                       qq!" />\n!;
5646         } else {
5647                 my $nr;
5648                 while (my $line = <$fd>) {
5649                         chomp $line;
5650                         $nr++;
5651                         $line = untabify($line);
5652                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5653                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5654                 }
5655         }
5656         close $fd
5657                 or print "Reading blob failed.\n";
5658         print "</div>";
5659         git_footer_html();
5660 }
5661
5662 sub git_tree {
5663         if (!defined $hash_base) {
5664                 $hash_base = "HEAD";
5665         }
5666         if (!defined $hash) {
5667                 if (defined $file_name) {
5668                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5669                 } else {
5670                         $hash = $hash_base;
5671                 }
5672         }
5673         die_error(404, "No such tree") unless defined($hash);
5674
5675         my $show_sizes = gitweb_check_feature('show-sizes');
5676         my $have_blame = gitweb_check_feature('blame');
5677
5678         my @entries = ();
5679         {
5680                 local $/ = "\0";
5681                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5682                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5683                         or die_error(500, "Open git-ls-tree failed");
5684                 @entries = map { chomp; $_ } <$fd>;
5685                 close $fd
5686                         or die_error(404, "Reading tree failed");
5687         }
5688
5689         my $refs = git_get_references();
5690         my $ref = format_ref_marker($refs, $hash_base);
5691         git_header_html();
5692         my $basedir = '';
5693         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5694                 my @views_nav = ();
5695                 if (defined $file_name) {
5696                         push @views_nav,
5697                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5698                                         "history"),
5699                                 $cgi->a({-href => href(action=>"tree",
5700                                                        hash_base=>"HEAD", file_name=>$file_name)},
5701                                         "HEAD"),
5702                 }
5703                 my $snapshot_links = format_snapshot_links($hash);
5704                 if (defined $snapshot_links) {
5705                         # FIXME: Should be available when we have no hash base as well.
5706                         push @views_nav, $snapshot_links;
5707                 }
5708                 git_print_page_nav('tree','', $hash_base, undef, undef,
5709                                    join(' | ', @views_nav));
5710                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5711         } else {
5712                 undef $hash_base;
5713                 print "<div class=\"page_nav\">\n";
5714                 print "<br/><br/></div>\n";
5715                 print "<div class=\"title\">$hash</div>\n";
5716         }
5717         if (defined $file_name) {
5718                 $basedir = $file_name;
5719                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5720                         $basedir .= '/';
5721                 }
5722                 git_print_page_path($file_name, 'tree', $hash_base);
5723         }
5724         print "<div class=\"page_body\">\n";
5725         print "<table class=\"tree\">\n";
5726         my $alternate = 1;
5727         # '..' (top directory) link if possible
5728         if (defined $hash_base &&
5729             defined $file_name && $file_name =~ m![^/]+$!) {
5730                 if ($alternate) {
5731                         print "<tr class=\"dark\">\n";
5732                 } else {
5733                         print "<tr class=\"light\">\n";
5734                 }
5735                 $alternate ^= 1;
5736
5737                 my $up = $file_name;
5738                 $up =~ s!/?[^/]+$!!;
5739                 undef $up unless $up;
5740                 # based on git_print_tree_entry
5741                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5742                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5743                 print '<td class="list">';
5744                 print $cgi->a({-href => href(action=>"tree",
5745                                              hash_base=>$hash_base,
5746                                              file_name=>$up)},
5747                               "..");
5748                 print "</td>\n";
5749                 print "<td class=\"link\"></td>\n";
5750
5751                 print "</tr>\n";
5752         }
5753         foreach my $line (@entries) {
5754                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5755
5756                 if ($alternate) {
5757                         print "<tr class=\"dark\">\n";
5758                 } else {
5759                         print "<tr class=\"light\">\n";
5760                 }
5761                 $alternate ^= 1;
5762
5763                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5764
5765                 print "</tr>\n";
5766         }
5767         print "</table>\n" .
5768               "</div>";
5769         git_footer_html();
5770 }
5771
5772 sub snapshot_name {
5773         my ($project, $hash) = @_;
5774
5775         # path/to/project.git  -> project
5776         # path/to/project/.git -> project
5777         my $name = to_utf8($project);
5778         $name =~ s,([^/])/*\.git$,$1,;
5779         $name = basename($name);
5780         # sanitize name
5781         $name =~ s/[[:cntrl:]]/?/g;
5782
5783         my $ver = $hash;
5784         if ($hash =~ /^[0-9a-fA-F]+$/) {
5785                 # shorten SHA-1 hash
5786                 my $full_hash = git_get_full_hash($project, $hash);
5787                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5788                         $ver = git_get_short_hash($project, $hash);
5789                 }
5790         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5791                 # tags don't need shortened SHA-1 hash
5792                 $ver = $1;
5793         } else {
5794                 # branches and other need shortened SHA-1 hash
5795                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5796                         $ver = $1;
5797                 }
5798                 $ver .= '-' . git_get_short_hash($project, $hash);
5799         }
5800         # in case of hierarchical branch names
5801         $ver =~ s!/!.!g;
5802
5803         # name = project-version_string
5804         $name = "$name-$ver";
5805
5806         return wantarray ? ($name, $name) : $name;
5807 }
5808
5809 sub git_snapshot {
5810         my $format = $input_params{'snapshot_format'};
5811         if (!@snapshot_fmts) {
5812                 die_error(403, "Snapshots not allowed");
5813         }
5814         # default to first supported snapshot format
5815         $format ||= $snapshot_fmts[0];
5816         if ($format !~ m/^[a-z0-9]+$/) {
5817                 die_error(400, "Invalid snapshot format parameter");
5818         } elsif (!exists($known_snapshot_formats{$format})) {
5819                 die_error(400, "Unknown snapshot format");
5820         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5821                 die_error(403, "Snapshot format not allowed");
5822         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5823                 die_error(403, "Unsupported snapshot format");
5824         }
5825
5826         my $type = git_get_type("$hash^{}");
5827         if (!$type) {
5828                 die_error(404, 'Object does not exist');
5829         }  elsif ($type eq 'blob') {
5830                 die_error(400, 'Object is not a tree-ish');
5831         }
5832
5833         my ($name, $prefix) = snapshot_name($project, $hash);
5834         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5835         my $cmd = quote_command(
5836                 git_cmd(), 'archive',
5837                 "--format=$known_snapshot_formats{$format}{'format'}",
5838                 "--prefix=$prefix/", $hash);
5839         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5840                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5841         }
5842
5843         $filename =~ s/(["\\])/\\$1/g;
5844         print $cgi->header(
5845                 -type => $known_snapshot_formats{$format}{'type'},
5846                 -content_disposition => 'inline; filename="' . $filename . '"',
5847                 -status => '200 OK');
5848
5849         open my $fd, "-|", $cmd
5850                 or die_error(500, "Execute git-archive failed");
5851         binmode STDOUT, ':raw';
5852         print <$fd>;
5853         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5854         close $fd;
5855 }
5856
5857 sub git_log_generic {
5858         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5859
5860         my $head = git_get_head_hash($project);
5861         if (!defined $base) {
5862                 $base = $head;
5863         }
5864         if (!defined $page) {
5865                 $page = 0;
5866         }
5867         my $refs = git_get_references();
5868
5869         my $commit_hash = $base;
5870         if (defined $parent) {
5871                 $commit_hash = "$parent..$base";
5872         }
5873         my @commitlist =
5874                 parse_commits($commit_hash, 101, (100 * $page),
5875                               defined $file_name ? ($file_name, "--full-history") : ());
5876
5877         my $ftype;
5878         if (!defined $file_hash && defined $file_name) {
5879                 # some commits could have deleted file in question,
5880                 # and not have it in tree, but one of them has to have it
5881                 for (my $i = 0; $i < @commitlist; $i++) {
5882                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5883                         last if defined $file_hash;
5884                 }
5885         }
5886         if (defined $file_hash) {
5887                 $ftype = git_get_type($file_hash);
5888         }
5889         if (defined $file_name && !defined $ftype) {
5890                 die_error(500, "Unknown type of object");
5891         }
5892         my %co;
5893         if (defined $file_name) {
5894                 %co = parse_commit($base)
5895                         or die_error(404, "Unknown commit object");
5896         }
5897
5898
5899         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5900         my $next_link = '';
5901         if ($#commitlist >= 100) {
5902                 $next_link =
5903                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5904                                  -accesskey => "n", -title => "Alt-n"}, "next");
5905         }
5906         my $patch_max = gitweb_get_feature('patches');
5907         if ($patch_max && !defined $file_name) {
5908                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5909                         $paging_nav .= " &sdot; " .
5910                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5911                                         "patches");
5912                 }
5913         }
5914
5915         git_header_html();
5916         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5917         if (defined $file_name) {
5918                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5919         } else {
5920                 git_print_header_div('summary', $project)
5921         }
5922         git_print_page_path($file_name, $ftype, $hash_base)
5923                 if (defined $file_name);
5924
5925         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5926                      $file_name, $file_hash, $ftype);
5927
5928         git_footer_html();
5929 }
5930
5931 sub git_log {
5932         git_log_generic('log', \&git_log_body,
5933                         $hash, $hash_parent);
5934 }
5935
5936 sub git_commit {
5937         $hash ||= $hash_base || "HEAD";
5938         my %co = parse_commit($hash)
5939             or die_error(404, "Unknown commit object");
5940
5941         my $parent  = $co{'parent'};
5942         my $parents = $co{'parents'}; # listref
5943
5944         # we need to prepare $formats_nav before any parameter munging
5945         my $formats_nav;
5946         if (!defined $parent) {
5947                 # --root commitdiff
5948                 $formats_nav .= '(initial)';
5949         } elsif (@$parents == 1) {
5950                 # single parent commit
5951                 $formats_nav .=
5952                         '(parent: ' .
5953                         $cgi->a({-href => href(action=>"commit",
5954                                                hash=>$parent)},
5955                                 esc_html(substr($parent, 0, 7))) .
5956                         ')';
5957         } else {
5958                 # merge commit
5959                 $formats_nav .=
5960                         '(merge: ' .
5961                         join(' ', map {
5962                                 $cgi->a({-href => href(action=>"commit",
5963                                                        hash=>$_)},
5964                                         esc_html(substr($_, 0, 7)));
5965                         } @$parents ) .
5966                         ')';
5967         }
5968         if (gitweb_check_feature('patches') && @$parents <= 1) {
5969                 $formats_nav .= " | " .
5970                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5971                                 "patch");
5972         }
5973
5974         if (!defined $parent) {
5975                 $parent = "--root";
5976         }
5977         my @difftree;
5978         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5979                 @diff_opts,
5980                 (@$parents <= 1 ? $parent : '-c'),
5981                 $hash, "--"
5982                 or die_error(500, "Open git-diff-tree failed");
5983         @difftree = map { chomp; $_ } <$fd>;
5984         close $fd or die_error(404, "Reading git-diff-tree failed");
5985
5986         # non-textual hash id's can be cached
5987         my $expires;
5988         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5989                 $expires = "+1d";
5990         }
5991         my $refs = git_get_references();
5992         my $ref = format_ref_marker($refs, $co{'id'});
5993
5994         git_header_html(undef, $expires);
5995         git_print_page_nav('commit', '',
5996                            $hash, $co{'tree'}, $hash,
5997                            $formats_nav);
5998
5999         if (defined $co{'parent'}) {
6000                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6001         } else {
6002                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6003         }
6004         print "<div class=\"title_text\">\n" .
6005               "<table class=\"object_header\">\n";
6006         git_print_authorship_rows(\%co);
6007         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6008         print "<tr>" .
6009               "<td>tree</td>" .
6010               "<td class=\"sha1\">" .
6011               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6012                        class => "list"}, $co{'tree'}) .
6013               "</td>" .
6014               "<td class=\"link\">" .
6015               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6016                       "tree");
6017         my $snapshot_links = format_snapshot_links($hash);
6018         if (defined $snapshot_links) {
6019                 print " | " . $snapshot_links;
6020         }
6021         print "</td>" .
6022               "</tr>\n";
6023
6024         foreach my $par (@$parents) {
6025                 print "<tr>" .
6026                       "<td>parent</td>" .
6027                       "<td class=\"sha1\">" .
6028                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6029                                class => "list"}, $par) .
6030                       "</td>" .
6031                       "<td class=\"link\">" .
6032                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6033                       " | " .
6034                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6035                       "</td>" .
6036                       "</tr>\n";
6037         }
6038         print "</table>".
6039               "</div>\n";
6040
6041         print "<div class=\"page_body\">\n";
6042         git_print_log($co{'comment'});
6043         print "</div>\n";
6044
6045         git_difftree_body(\@difftree, $hash, @$parents);
6046
6047         git_footer_html();
6048 }
6049
6050 sub git_object {
6051         # object is defined by:
6052         # - hash or hash_base alone
6053         # - hash_base and file_name
6054         my $type;
6055
6056         # - hash or hash_base alone
6057         if ($hash || ($hash_base && !defined $file_name)) {
6058                 my $object_id = $hash || $hash_base;
6059
6060                 open my $fd, "-|", quote_command(
6061                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6062                         or die_error(404, "Object does not exist");
6063                 $type = <$fd>;
6064                 chomp $type;
6065                 close $fd
6066                         or die_error(404, "Object does not exist");
6067
6068         # - hash_base and file_name
6069         } elsif ($hash_base && defined $file_name) {
6070                 $file_name =~ s,/+$,,;
6071
6072                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6073                         or die_error(404, "Base object does not exist");
6074
6075                 # here errors should not hapen
6076                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6077                         or die_error(500, "Open git-ls-tree failed");
6078                 my $line = <$fd>;
6079                 close $fd;
6080
6081                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6082                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6083                         die_error(404, "File or directory for given base does not exist");
6084                 }
6085                 $type = $2;
6086                 $hash = $3;
6087         } else {
6088                 die_error(400, "Not enough information to find object");
6089         }
6090
6091         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6092                                           hash=>$hash, hash_base=>$hash_base,
6093                                           file_name=>$file_name),
6094                              -status => '302 Found');
6095 }
6096
6097 sub git_blobdiff {
6098         my $format = shift || 'html';
6099
6100         my $fd;
6101         my @difftree;
6102         my %diffinfo;
6103         my $expires;
6104
6105         # preparing $fd and %diffinfo for git_patchset_body
6106         # new style URI
6107         if (defined $hash_base && defined $hash_parent_base) {
6108                 if (defined $file_name) {
6109                         # read raw output
6110                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6111                                 $hash_parent_base, $hash_base,
6112                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6113                                 or die_error(500, "Open git-diff-tree failed");
6114                         @difftree = map { chomp; $_ } <$fd>;
6115                         close $fd
6116                                 or die_error(404, "Reading git-diff-tree failed");
6117                         @difftree
6118                                 or die_error(404, "Blob diff not found");
6119
6120                 } elsif (defined $hash &&
6121                          $hash =~ /[0-9a-fA-F]{40}/) {
6122                         # try to find filename from $hash
6123
6124                         # read filtered raw output
6125                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6126                                 $hash_parent_base, $hash_base, "--"
6127                                 or die_error(500, "Open git-diff-tree failed");
6128                         @difftree =
6129                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6130                                 # $hash == to_id
6131                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6132                                 map { chomp; $_ } <$fd>;
6133                         close $fd
6134                                 or die_error(404, "Reading git-diff-tree failed");
6135                         @difftree
6136                                 or die_error(404, "Blob diff not found");
6137
6138                 } else {
6139                         die_error(400, "Missing one of the blob diff parameters");
6140                 }
6141
6142                 if (@difftree > 1) {
6143                         die_error(400, "Ambiguous blob diff specification");
6144                 }
6145
6146                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6147                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6148                 $file_name   ||= $diffinfo{'to_file'};
6149
6150                 $hash_parent ||= $diffinfo{'from_id'};
6151                 $hash        ||= $diffinfo{'to_id'};
6152
6153                 # non-textual hash id's can be cached
6154                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6155                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6156                         $expires = '+1d';
6157                 }
6158
6159                 # open patch output
6160                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6161                         '-p', ($format eq 'html' ? "--full-index" : ()),
6162                         $hash_parent_base, $hash_base,
6163                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6164                         or die_error(500, "Open git-diff-tree failed");
6165         }
6166
6167         # old/legacy style URI -- not generated anymore since 1.4.3.
6168         if (!%diffinfo) {
6169                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6170         }
6171
6172         # header
6173         if ($format eq 'html') {
6174                 my $formats_nav =
6175                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6176                                 "raw");
6177                 git_header_html(undef, $expires);
6178                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6179                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6180                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6181                 } else {
6182                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6183                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6184                 }
6185                 if (defined $file_name) {
6186                         git_print_page_path($file_name, "blob", $hash_base);
6187                 } else {
6188                         print "<div class=\"page_path\"></div>\n";
6189                 }
6190
6191         } elsif ($format eq 'plain') {
6192                 print $cgi->header(
6193                         -type => 'text/plain',
6194                         -charset => 'utf-8',
6195                         -expires => $expires,
6196                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6197
6198                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6199
6200         } else {
6201                 die_error(400, "Unknown blobdiff format");
6202         }
6203
6204         # patch
6205         if ($format eq 'html') {
6206                 print "<div class=\"page_body\">\n";
6207
6208                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6209                 close $fd;
6210
6211                 print "</div>\n"; # class="page_body"
6212                 git_footer_html();
6213
6214         } else {
6215                 while (my $line = <$fd>) {
6216                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6217                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6218
6219                         print $line;
6220
6221                         last if $line =~ m!^\+\+\+!;
6222                 }
6223                 local $/ = undef;
6224                 print <$fd>;
6225                 close $fd;
6226         }
6227 }
6228
6229 sub git_blobdiff_plain {
6230         git_blobdiff('plain');
6231 }
6232
6233 sub git_commitdiff {
6234         my %params = @_;
6235         my $format = $params{-format} || 'html';
6236
6237         my ($patch_max) = gitweb_get_feature('patches');
6238         if ($format eq 'patch') {
6239                 die_error(403, "Patch view not allowed") unless $patch_max;
6240         }
6241
6242         $hash ||= $hash_base || "HEAD";
6243         my %co = parse_commit($hash)
6244             or die_error(404, "Unknown commit object");
6245
6246         # choose format for commitdiff for merge
6247         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6248                 $hash_parent = '--cc';
6249         }
6250         # we need to prepare $formats_nav before almost any parameter munging
6251         my $formats_nav;
6252         if ($format eq 'html') {
6253                 $formats_nav =
6254                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6255                                 "raw");
6256                 if ($patch_max && @{$co{'parents'}} <= 1) {
6257                         $formats_nav .= " | " .
6258                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6259                                         "patch");
6260                 }
6261
6262                 if (defined $hash_parent &&
6263                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6264                         # commitdiff with two commits given
6265                         my $hash_parent_short = $hash_parent;
6266                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6267                                 $hash_parent_short = substr($hash_parent, 0, 7);
6268                         }
6269                         $formats_nav .=
6270                                 ' (from';
6271                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6272                                 if ($co{'parents'}[$i] eq $hash_parent) {
6273                                         $formats_nav .= ' parent ' . ($i+1);
6274                                         last;
6275                                 }
6276                         }
6277                         $formats_nav .= ': ' .
6278                                 $cgi->a({-href => href(action=>"commitdiff",
6279                                                        hash=>$hash_parent)},
6280                                         esc_html($hash_parent_short)) .
6281                                 ')';
6282                 } elsif (!$co{'parent'}) {
6283                         # --root commitdiff
6284                         $formats_nav .= ' (initial)';
6285                 } elsif (scalar @{$co{'parents'}} == 1) {
6286                         # single parent commit
6287                         $formats_nav .=
6288                                 ' (parent: ' .
6289                                 $cgi->a({-href => href(action=>"commitdiff",
6290                                                        hash=>$co{'parent'})},
6291                                         esc_html(substr($co{'parent'}, 0, 7))) .
6292                                 ')';
6293                 } else {
6294                         # merge commit
6295                         if ($hash_parent eq '--cc') {
6296                                 $formats_nav .= ' | ' .
6297                                         $cgi->a({-href => href(action=>"commitdiff",
6298                                                                hash=>$hash, hash_parent=>'-c')},
6299                                                 'combined');
6300                         } else { # $hash_parent eq '-c'
6301                                 $formats_nav .= ' | ' .
6302                                         $cgi->a({-href => href(action=>"commitdiff",
6303                                                                hash=>$hash, hash_parent=>'--cc')},
6304                                                 'compact');
6305                         }
6306                         $formats_nav .=
6307                                 ' (merge: ' .
6308                                 join(' ', map {
6309                                         $cgi->a({-href => href(action=>"commitdiff",
6310                                                                hash=>$_)},
6311                                                 esc_html(substr($_, 0, 7)));
6312                                 } @{$co{'parents'}} ) .
6313                                 ')';
6314                 }
6315         }
6316
6317         my $hash_parent_param = $hash_parent;
6318         if (!defined $hash_parent_param) {
6319                 # --cc for multiple parents, --root for parentless
6320                 $hash_parent_param =
6321                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6322         }
6323
6324         # read commitdiff
6325         my $fd;
6326         my @difftree;
6327         if ($format eq 'html') {
6328                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6329                         "--no-commit-id", "--patch-with-raw", "--full-index",
6330                         $hash_parent_param, $hash, "--"
6331                         or die_error(500, "Open git-diff-tree failed");
6332
6333                 while (my $line = <$fd>) {
6334                         chomp $line;
6335                         # empty line ends raw part of diff-tree output
6336                         last unless $line;
6337                         push @difftree, scalar parse_difftree_raw_line($line);
6338                 }
6339
6340         } elsif ($format eq 'plain') {
6341                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6342                         '-p', $hash_parent_param, $hash, "--"
6343                         or die_error(500, "Open git-diff-tree failed");
6344         } elsif ($format eq 'patch') {
6345                 # For commit ranges, we limit the output to the number of
6346                 # patches specified in the 'patches' feature.
6347                 # For single commits, we limit the output to a single patch,
6348                 # diverging from the git-format-patch default.
6349                 my @commit_spec = ();
6350                 if ($hash_parent) {
6351                         if ($patch_max > 0) {
6352                                 push @commit_spec, "-$patch_max";
6353                         }
6354                         push @commit_spec, '-n', "$hash_parent..$hash";
6355                 } else {
6356                         if ($params{-single}) {
6357                                 push @commit_spec, '-1';
6358                         } else {
6359                                 if ($patch_max > 0) {
6360                                         push @commit_spec, "-$patch_max";
6361                                 }
6362                                 push @commit_spec, "-n";
6363                         }
6364                         push @commit_spec, '--root', $hash;
6365                 }
6366                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6367                         '--encoding=utf8', '--stdout', @commit_spec
6368                         or die_error(500, "Open git-format-patch failed");
6369         } else {
6370                 die_error(400, "Unknown commitdiff format");
6371         }
6372
6373         # non-textual hash id's can be cached
6374         my $expires;
6375         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6376                 $expires = "+1d";
6377         }
6378
6379         # write commit message
6380         if ($format eq 'html') {
6381                 my $refs = git_get_references();
6382                 my $ref = format_ref_marker($refs, $co{'id'});
6383
6384                 git_header_html(undef, $expires);
6385                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6386                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6387                 print "<div class=\"title_text\">\n" .
6388                       "<table class=\"object_header\">\n";
6389                 git_print_authorship_rows(\%co);
6390                 print "</table>".
6391                       "</div>\n";
6392                 print "<div class=\"page_body\">\n";
6393                 if (@{$co{'comment'}} > 1) {
6394                         print "<div class=\"log\">\n";
6395                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6396                         print "</div>\n"; # class="log"
6397                 }
6398
6399         } elsif ($format eq 'plain') {
6400                 my $refs = git_get_references("tags");
6401                 my $tagname = git_get_rev_name_tags($hash);
6402                 my $filename = basename($project) . "-$hash.patch";
6403
6404                 print $cgi->header(
6405                         -type => 'text/plain',
6406                         -charset => 'utf-8',
6407                         -expires => $expires,
6408                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6409                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6410                 print "From: " . to_utf8($co{'author'}) . "\n";
6411                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6412                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6413
6414                 print "X-Git-Tag: $tagname\n" if $tagname;
6415                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6416
6417                 foreach my $line (@{$co{'comment'}}) {
6418                         print to_utf8($line) . "\n";
6419                 }
6420                 print "---\n\n";
6421         } elsif ($format eq 'patch') {
6422                 my $filename = basename($project) . "-$hash.patch";
6423
6424                 print $cgi->header(
6425                         -type => 'text/plain',
6426                         -charset => 'utf-8',
6427                         -expires => $expires,
6428                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6429         }
6430
6431         # write patch
6432         if ($format eq 'html') {
6433                 my $use_parents = !defined $hash_parent ||
6434                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6435                 git_difftree_body(\@difftree, $hash,
6436                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6437                 print "<br/>\n";
6438
6439                 git_patchset_body($fd, \@difftree, $hash,
6440                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6441                 close $fd;
6442                 print "</div>\n"; # class="page_body"
6443                 git_footer_html();
6444
6445         } elsif ($format eq 'plain') {
6446                 local $/ = undef;
6447                 print <$fd>;
6448                 close $fd
6449                         or print "Reading git-diff-tree failed\n";
6450         } elsif ($format eq 'patch') {
6451                 local $/ = undef;
6452                 print <$fd>;
6453                 close $fd
6454                         or print "Reading git-format-patch failed\n";
6455         }
6456 }
6457
6458 sub git_commitdiff_plain {
6459         git_commitdiff(-format => 'plain');
6460 }
6461
6462 # format-patch-style patches
6463 sub git_patch {
6464         git_commitdiff(-format => 'patch', -single => 1);
6465 }
6466
6467 sub git_patches {
6468         git_commitdiff(-format => 'patch');
6469 }
6470
6471 sub git_history {
6472         git_log_generic('history', \&git_history_body,
6473                         $hash_base, $hash_parent_base,
6474                         $file_name, $hash);
6475 }
6476
6477 sub git_search {
6478         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6479         if (!defined $searchtext) {
6480                 die_error(400, "Text field is empty");
6481         }
6482         if (!defined $hash) {
6483                 $hash = git_get_head_hash($project);
6484         }
6485         my %co = parse_commit($hash);
6486         if (!%co) {
6487                 die_error(404, "Unknown commit object");
6488         }
6489         if (!defined $page) {
6490                 $page = 0;
6491         }
6492
6493         $searchtype ||= 'commit';
6494         if ($searchtype eq 'pickaxe') {
6495                 # pickaxe may take all resources of your box and run for several minutes
6496                 # with every query - so decide by yourself how public you make this feature
6497                 gitweb_check_feature('pickaxe')
6498                     or die_error(403, "Pickaxe is disabled");
6499         }
6500         if ($searchtype eq 'grep') {
6501                 gitweb_check_feature('grep')
6502                     or die_error(403, "Grep is disabled");
6503         }
6504
6505         git_header_html();
6506
6507         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6508                 my $greptype;
6509                 if ($searchtype eq 'commit') {
6510                         $greptype = "--grep=";
6511                 } elsif ($searchtype eq 'author') {
6512                         $greptype = "--author=";
6513                 } elsif ($searchtype eq 'committer') {
6514                         $greptype = "--committer=";
6515                 }
6516                 $greptype .= $searchtext;
6517                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6518                                                $greptype, '--regexp-ignore-case',
6519                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6520
6521                 my $paging_nav = '';
6522                 if ($page > 0) {
6523                         $paging_nav .=
6524                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6525                                                        searchtext=>$searchtext,
6526                                                        searchtype=>$searchtype)},
6527                                         "first");
6528                         $paging_nav .= " &sdot; " .
6529                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6530                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6531                 } else {
6532                         $paging_nav .= "first";
6533                         $paging_nav .= " &sdot; prev";
6534                 }
6535                 my $next_link = '';
6536                 if ($#commitlist >= 100) {
6537                         $next_link =
6538                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6539                                          -accesskey => "n", -title => "Alt-n"}, "next");
6540                         $paging_nav .= " &sdot; $next_link";
6541                 } else {
6542                         $paging_nav .= " &sdot; next";
6543                 }
6544
6545                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6546                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6547                 if ($page == 0 && !@commitlist) {
6548                         print "<p>No match.</p>\n";
6549                 } else {
6550                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6551                 }
6552         }
6553
6554         if ($searchtype eq 'pickaxe') {
6555                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6556                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6557
6558                 print "<table class=\"pickaxe search\">\n";
6559                 my $alternate = 1;
6560                 local $/ = "\n";
6561                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6562                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6563                         ($search_use_regexp ? '--pickaxe-regex' : ());
6564                 undef %co;
6565                 my @files;
6566                 while (my $line = <$fd>) {
6567                         chomp $line;
6568                         next unless $line;
6569
6570                         my %set = parse_difftree_raw_line($line);
6571                         if (defined $set{'commit'}) {
6572                                 # finish previous commit
6573                                 if (%co) {
6574                                         print "</td>\n" .
6575                                               "<td class=\"link\">" .
6576                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6577                                               " | " .
6578                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6579                                         print "</td>\n" .
6580                                               "</tr>\n";
6581                                 }
6582
6583                                 if ($alternate) {
6584                                         print "<tr class=\"dark\">\n";
6585                                 } else {
6586                                         print "<tr class=\"light\">\n";
6587                                 }
6588                                 $alternate ^= 1;
6589                                 %co = parse_commit($set{'commit'});
6590                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6591                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6592                                       "<td><i>$author</i></td>\n" .
6593                                       "<td>" .
6594                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6595                                               -class => "list subject"},
6596                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6597                         } elsif (defined $set{'to_id'}) {
6598                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6599
6600                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6601                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6602                                               -class => "list"},
6603                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6604                                       "<br/>\n";
6605                         }
6606                 }
6607                 close $fd;
6608
6609                 # finish last commit (warning: repetition!)
6610                 if (%co) {
6611                         print "</td>\n" .
6612                               "<td class=\"link\">" .
6613                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6614                               " | " .
6615                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6616                         print "</td>\n" .
6617                               "</tr>\n";
6618                 }
6619
6620                 print "</table>\n";
6621         }
6622
6623         if ($searchtype eq 'grep') {
6624                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6625                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6626
6627                 print "<table class=\"grep_search\">\n";
6628                 my $alternate = 1;
6629                 my $matches = 0;
6630                 local $/ = "\n";
6631                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6632                         $search_use_regexp ? ('-E', '-i') : '-F',
6633                         $searchtext, $co{'tree'};
6634                 my $lastfile = '';
6635                 while (my $line = <$fd>) {
6636                         chomp $line;
6637                         my ($file, $lno, $ltext, $binary);
6638                         last if ($matches++ > 1000);
6639                         if ($line =~ /^Binary file (.+) matches$/) {
6640                                 $file = $1;
6641                                 $binary = 1;
6642                         } else {
6643                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6644                         }
6645                         if ($file ne $lastfile) {
6646                                 $lastfile and print "</td></tr>\n";
6647                                 if ($alternate++) {
6648                                         print "<tr class=\"dark\">\n";
6649                                 } else {
6650                                         print "<tr class=\"light\">\n";
6651                                 }
6652                                 print "<td class=\"list\">".
6653                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6654                                                                file_name=>"$file"),
6655                                                 -class => "list"}, esc_path($file));
6656                                 print "</td><td>\n";
6657                                 $lastfile = $file;
6658                         }
6659                         if ($binary) {
6660                                 print "<div class=\"binary\">Binary file</div>\n";
6661                         } else {
6662                                 $ltext = untabify($ltext);
6663                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6664                                         $ltext = esc_html($1, -nbsp=>1);
6665                                         $ltext .= '<span class="match">';
6666                                         $ltext .= esc_html($2, -nbsp=>1);
6667                                         $ltext .= '</span>';
6668                                         $ltext .= esc_html($3, -nbsp=>1);
6669                                 } else {
6670                                         $ltext = esc_html($ltext, -nbsp=>1);
6671                                 }
6672                                 print "<div class=\"pre\">" .
6673                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6674                                                                file_name=>"$file").'#l'.$lno,
6675                                                 -class => "linenr"}, sprintf('%4i', $lno))
6676                                         . ' ' .  $ltext . "</div>\n";
6677                         }
6678                 }
6679                 if ($lastfile) {
6680                         print "</td></tr>\n";
6681                         if ($matches > 1000) {
6682                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6683                         }
6684                 } else {
6685                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6686                 }
6687                 close $fd;
6688
6689                 print "</table>\n";
6690         }
6691         git_footer_html();
6692 }
6693
6694 sub git_search_help {
6695         git_header_html();
6696         git_print_page_nav('','', $hash,$hash,$hash);
6697         print <<EOT;
6698 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6699 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6700 the pattern entered is recognized as the POSIX extended
6701 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6702 insensitive).</p>
6703 <dl>
6704 <dt><b>commit</b></dt>
6705 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6706 EOT
6707         my $have_grep = gitweb_check_feature('grep');
6708         if ($have_grep) {
6709                 print <<EOT;
6710 <dt><b>grep</b></dt>
6711 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6712     a different one) are searched for the given pattern. On large trees, this search can take
6713 a while and put some strain on the server, so please use it with some consideration. Note that
6714 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6715 case-sensitive.</dd>
6716 EOT
6717         }
6718         print <<EOT;
6719 <dt><b>author</b></dt>
6720 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6721 <dt><b>committer</b></dt>
6722 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6723 EOT
6724         my $have_pickaxe = gitweb_check_feature('pickaxe');
6725         if ($have_pickaxe) {
6726                 print <<EOT;
6727 <dt><b>pickaxe</b></dt>
6728 <dd>All commits that caused the string to appear or disappear from any file (changes that
6729 added, removed or "modified" the string) will be listed. This search can take a while and
6730 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6731 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6732 EOT
6733         }
6734         print "</dl>\n";
6735         git_footer_html();
6736 }
6737
6738 sub git_shortlog {
6739         git_log_generic('shortlog', \&git_shortlog_body,
6740                         $hash, $hash_parent);
6741 }
6742
6743 ## ......................................................................
6744 ## feeds (RSS, Atom; OPML)
6745
6746 sub git_feed {
6747         my $format = shift || 'atom';
6748         my $have_blame = gitweb_check_feature('blame');
6749
6750         # Atom: http://www.atomenabled.org/developers/syndication/
6751         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6752         if ($format ne 'rss' && $format ne 'atom') {
6753                 die_error(400, "Unknown web feed format");
6754         }
6755
6756         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6757         my $head = $hash || 'HEAD';
6758         my @commitlist = parse_commits($head, 150, 0, $file_name);
6759
6760         my %latest_commit;
6761         my %latest_date;
6762         my $content_type = "application/$format+xml";
6763         if (defined $cgi->http('HTTP_ACCEPT') &&
6764                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6765                 # browser (feed reader) prefers text/xml
6766                 $content_type = 'text/xml';
6767         }
6768         if (defined($commitlist[0])) {
6769                 %latest_commit = %{$commitlist[0]};
6770                 my $latest_epoch = $latest_commit{'committer_epoch'};
6771                 %latest_date   = parse_date($latest_epoch);
6772                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6773                 if (defined $if_modified) {
6774                         my $since;
6775                         if (eval { require HTTP::Date; 1; }) {
6776                                 $since = HTTP::Date::str2time($if_modified);
6777                         } elsif (eval { require Time::ParseDate; 1; }) {
6778                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6779                         }
6780                         if (defined $since && $latest_epoch <= $since) {
6781                                 print $cgi->header(
6782                                         -type => $content_type,
6783                                         -charset => 'utf-8',
6784                                         -last_modified => $latest_date{'rfc2822'},
6785                                         -status => '304 Not Modified');
6786                                 return;
6787                         }
6788                 }
6789                 print $cgi->header(
6790                         -type => $content_type,
6791                         -charset => 'utf-8',
6792                         -last_modified => $latest_date{'rfc2822'});
6793         } else {
6794                 print $cgi->header(
6795                         -type => $content_type,
6796                         -charset => 'utf-8');
6797         }
6798
6799         # Optimization: skip generating the body if client asks only
6800         # for Last-Modified date.
6801         return if ($cgi->request_method() eq 'HEAD');
6802
6803         # header variables
6804         my $title = "$site_name - $project/$action";
6805         my $feed_type = 'log';
6806         if (defined $hash) {
6807                 $title .= " - '$hash'";
6808                 $feed_type = 'branch log';
6809                 if (defined $file_name) {
6810                         $title .= " :: $file_name";
6811                         $feed_type = 'history';
6812                 }
6813         } elsif (defined $file_name) {
6814                 $title .= " - $file_name";
6815                 $feed_type = 'history';
6816         }
6817         $title .= " $feed_type";
6818         my $descr = git_get_project_description($project);
6819         if (defined $descr) {
6820                 $descr = esc_html($descr);
6821         } else {
6822                 $descr = "$project " .
6823                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6824                          " feed";
6825         }
6826         my $owner = git_get_project_owner($project);
6827         $owner = esc_html($owner);
6828
6829         #header
6830         my $alt_url;
6831         if (defined $file_name) {
6832                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6833         } elsif (defined $hash) {
6834                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6835         } else {
6836                 $alt_url = href(-full=>1, action=>"summary");
6837         }
6838         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6839         if ($format eq 'rss') {
6840                 print <<XML;
6841 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6842 <channel>
6843 XML
6844                 print "<title>$title</title>\n" .
6845                       "<link>$alt_url</link>\n" .
6846                       "<description>$descr</description>\n" .
6847                       "<language>en</language>\n" .
6848                       # project owner is responsible for 'editorial' content
6849                       "<managingEditor>$owner</managingEditor>\n";
6850                 if (defined $logo || defined $favicon) {
6851                         # prefer the logo to the favicon, since RSS
6852                         # doesn't allow both
6853                         my $img = esc_url($logo || $favicon);
6854                         print "<image>\n" .
6855                               "<url>$img</url>\n" .
6856                               "<title>$title</title>\n" .
6857                               "<link>$alt_url</link>\n" .
6858                               "</image>\n";
6859                 }
6860                 if (%latest_date) {
6861                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6862                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6863                 }
6864                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6865         } elsif ($format eq 'atom') {
6866                 print <<XML;
6867 <feed xmlns="http://www.w3.org/2005/Atom">
6868 XML
6869                 print "<title>$title</title>\n" .
6870                       "<subtitle>$descr</subtitle>\n" .
6871                       '<link rel="alternate" type="text/html" href="' .
6872                       $alt_url . '" />' . "\n" .
6873                       '<link rel="self" type="' . $content_type . '" href="' .
6874                       $cgi->self_url() . '" />' . "\n" .
6875                       "<id>" . href(-full=>1) . "</id>\n" .
6876                       # use project owner for feed author
6877                       "<author><name>$owner</name></author>\n";
6878                 if (defined $favicon) {
6879                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6880                 }
6881                 if (defined $logo_url) {
6882                         # not twice as wide as tall: 72 x 27 pixels
6883                         print "<logo>" . esc_url($logo) . "</logo>\n";
6884                 }
6885                 if (! %latest_date) {
6886                         # dummy date to keep the feed valid until commits trickle in:
6887                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6888                 } else {
6889                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6890                 }
6891                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6892         }
6893
6894         # contents
6895         for (my $i = 0; $i <= $#commitlist; $i++) {
6896                 my %co = %{$commitlist[$i]};
6897                 my $commit = $co{'id'};
6898                 # we read 150, we always show 30 and the ones more recent than 48 hours
6899                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6900                         last;
6901                 }
6902                 my %cd = parse_date($co{'author_epoch'});
6903
6904                 # get list of changed files
6905                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6906                         $co{'parent'} || "--root",
6907                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6908                         or next;
6909                 my @difftree = map { chomp; $_ } <$fd>;
6910                 close $fd
6911                         or next;
6912
6913                 # print element (entry, item)
6914                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6915                 if ($format eq 'rss') {
6916                         print "<item>\n" .
6917                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6918                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6919                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6920                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6921                               "<link>$co_url</link>\n" .
6922                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6923                               "<content:encoded>" .
6924                               "<![CDATA[\n";
6925                 } elsif ($format eq 'atom') {
6926                         print "<entry>\n" .
6927                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6928                               "<updated>$cd{'iso-8601'}</updated>\n" .
6929                               "<author>\n" .
6930                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6931                         if ($co{'author_email'}) {
6932                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6933                         }
6934                         print "</author>\n" .
6935                               # use committer for contributor
6936                               "<contributor>\n" .
6937                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6938                         if ($co{'committer_email'}) {
6939                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6940                         }
6941                         print "</contributor>\n" .
6942                               "<published>$cd{'iso-8601'}</published>\n" .
6943                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6944                               "<id>$co_url</id>\n" .
6945                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6946                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6947                 }
6948                 my $comment = $co{'comment'};
6949                 print "<pre>\n";
6950                 foreach my $line (@$comment) {
6951                         $line = esc_html($line);
6952                         print "$line\n";
6953                 }
6954                 print "</pre><ul>\n";
6955                 foreach my $difftree_line (@difftree) {
6956                         my %difftree = parse_difftree_raw_line($difftree_line);
6957                         next if !$difftree{'from_id'};
6958
6959                         my $file = $difftree{'file'} || $difftree{'to_file'};
6960
6961                         print "<li>" .
6962                               "[" .
6963                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6964                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6965                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6966                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6967                                       -title => "diff"}, 'D');
6968                         if ($have_blame) {
6969                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6970                                                              file_name=>$file, hash_base=>$commit),
6971                                               -title => "blame"}, 'B');
6972                         }
6973                         # if this is not a feed of a file history
6974                         if (!defined $file_name || $file_name ne $file) {
6975                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6976                                                              file_name=>$file, hash=>$commit),
6977                                               -title => "history"}, 'H');
6978                         }
6979                         $file = esc_path($file);
6980                         print "] ".
6981                               "$file</li>\n";
6982                 }
6983                 if ($format eq 'rss') {
6984                         print "</ul>]]>\n" .
6985                               "</content:encoded>\n" .
6986                               "</item>\n";
6987                 } elsif ($format eq 'atom') {
6988                         print "</ul>\n</div>\n" .
6989                               "</content>\n" .
6990                               "</entry>\n";
6991                 }
6992         }
6993
6994         # end of feed
6995         if ($format eq 'rss') {
6996                 print "</channel>\n</rss>\n";
6997         } elsif ($format eq 'atom') {
6998                 print "</feed>\n";
6999         }
7000 }
7001
7002 sub git_rss {
7003         git_feed('rss');
7004 }
7005
7006 sub git_atom {
7007         git_feed('atom');
7008 }
7009
7010 sub git_opml {
7011         my @list = git_get_projects_list();
7012
7013         print $cgi->header(
7014                 -type => 'text/xml',
7015                 -charset => 'utf-8',
7016                 -content_disposition => 'inline; filename="opml.xml"');
7017
7018         print <<XML;
7019 <?xml version="1.0" encoding="utf-8"?>
7020 <opml version="1.0">
7021 <head>
7022   <title>$site_name OPML Export</title>
7023 </head>
7024 <body>
7025 <outline text="git RSS feeds">
7026 XML
7027
7028         foreach my $pr (@list) {
7029                 my %proj = %$pr;
7030                 my $head = git_get_head_hash($proj{'path'});
7031                 if (!defined $head) {
7032                         next;
7033                 }
7034                 $git_dir = "$projectroot/$proj{'path'}";
7035                 my %co = parse_commit($head);
7036                 if (!%co) {
7037                         next;
7038                 }
7039
7040                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7041                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7042                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7043                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7044         }
7045         print <<XML;
7046 </outline>
7047 </body>
7048 </opml>
7049 XML
7050 }