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