gitweb/gitweb.perl

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