gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 binmode STDOUT, ':utf8';
  21
  22 our $t0;
  23 if (eval { require Time::HiRes; 1; }) {
  24         $t0 = [Time::HiRes::gettimeofday()];
  25 }
  26 our $number_of_git_cmds = 0;
  27
  28 BEGIN {
  29         CGI->compile() if $ENV{'MOD_PERL'};
  30 }
  31
  32 our $version = "++GIT_VERSION++";
  33
  34 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  35 sub evaluate_uri {
  36         our $cgi;
  37
  38         our $my_url = $cgi->url();
  39         our $my_uri = $cgi->url(-absolute => 1);
  40
  41         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  42         # needed and used only for URLs with nonempty PATH_INFO
  43         our $base_url = $my_url;
  44
  45         # When the script is used as DirectoryIndex, the URL does not contain the name
  46         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  47         # have to do it ourselves. We make $path_info global because it's also used
  48         # later on.
  49         #
  50         # Another issue with the script being the DirectoryIndex is that the resulting
  51         # $my_url data is not the full script URL: this is good, because we want
  52         # generated links to keep implying the script name if it wasn't explicitly
  53         # indicated in the URL we're handling, but it means that $my_url cannot be used
  54         # as base URL.
  55         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  56         # to build the base URL ourselves:
  57         our $path_info = $ENV{"PATH_INFO"};
  58         if ($path_info) {
  59                 if ($my_url =~ s,\Q$path_info\E$,, &&
  60                     $my_uri =~ s,\Q$path_info\E$,, &&
  61                     defined $ENV{'SCRIPT_NAME'}) {
  62                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  63                 }
  64         }
  65
  66         # target of the home link on top of all pages
  67         our $home_link = $my_uri || "/";
  68 }
  69
  70 # core git executable to use
  71 # this can just be "git" if your webserver has a sensible PATH
  72 our $GIT = "++GIT_BINDIR++/git";
  73
  74 # absolute fs-path which will be prepended to the project path
  75 #our $projectroot = "/pub/scm";
  76 our $projectroot = "++GITWEB_PROJECTROOT++";
  77
  78 # fs traversing limit for getting project list
  79 # the number is relative to the projectroot
  80 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  81
  82 # string of the home link on top of all pages
  83 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  84
  85 # name of your site or organization to appear in page titles
  86 # replace this with something more descriptive for clearer bookmarks
  87 our $site_name = "++GITWEB_SITENAME++"
  88                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  89
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # default order of projects list
 121 # valid values are none, project, descr, owner, and age
 122 our $default_projects_order = "project";
 123
 124 # show repository only if this file exists
 125 # (only effective if this variable evaluates to true)
 126 our $export_ok = "++GITWEB_EXPORT_OK++";
 127
 128 # show repository only if this subroutine returns true
 129 # when given the path to the project, for example:
 130 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 131 our $export_auth_hook = undef;
 132
 133 # only allow viewing of repositories also shown on the overview page
 134 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 135
 136 # list of git base URLs used for URL to where fetch project from,
 137 # i.e. full URL is "$git_base_url/$project"
 138 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 139
 140 # default blob_plain mimetype and default charset for text/plain blob
 141 our $default_blob_plain_mimetype = 'text/plain';
 142 our $default_text_plain_charset  = undef;
 143
 144 # file to use for guessing MIME types before trying /etc/mime.types
 145 # (relative to the current git repository)
 146 our $mimetypes_file = undef;
 147
 148 # assume this charset if line contains non-UTF-8 characters;
 149 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 150 # for which encoding all byte sequences are valid, for example
 151 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 152 # could be even 'utf-8' for the old behavior)
 153 our $fallback_encoding = 'latin1';
 154
 155 # rename detection options for git-diff and git-diff-tree
 156 # - default is '-M', with the cost proportional to
 157 #   (number of removed files) * (number of new files).
 158 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 159 #   (number of changed files + number of removed files) * (number of new files)
 160 # - even more costly is '-C', '--find-copies-harder' with cost
 161 #   (number of files in the original tree) * (number of new files)
 162 # - one might want to include '-B' option, e.g. '-B', '-M'
 163 our @diff_opts = ('-M'); # taken from git_commit
 164
 165 # Disables features that would allow repository owners to inject script into
 166 # the gitweb domain.
 167 our $prevent_xss = 0;
 168
 169 # information about snapshot formats that gitweb is capable of serving
 170 our %known_snapshot_formats = (
 171         # name => {
 172         #       'display' => display name,
 173         #       'type' => mime type,
 174         #       'suffix' => filename suffix,
 175         #       'format' => --format for git-archive,
 176         #       'compressor' => [compressor command and arguments]
 177         #                       (array reference, optional)
 178         #       'disabled' => boolean (optional)}
 179         #
 180         'tgz' => {
 181                 'display' => 'tar.gz',
 182                 'type' => 'application/x-gzip',
 183                 'suffix' => '.tar.gz',
 184                 'format' => 'tar',
 185                 'compressor' => ['gzip']},
 186
 187         'tbz2' => {
 188                 'display' => 'tar.bz2',
 189                 'type' => 'application/x-bzip2',
 190                 'suffix' => '.tar.bz2',
 191                 'format' => 'tar',
 192                 'compressor' => ['bzip2']},
 193
 194         'txz' => {
 195                 'display' => 'tar.xz',
 196                 'type' => 'application/x-xz',
 197                 'suffix' => '.tar.xz',
 198                 'format' => 'tar',
 199                 'compressor' => ['xz'],
 200                 'disabled' => 1},
 201
 202         'zip' => {
 203                 'display' => 'zip',
 204                 'type' => 'application/x-zip',
 205                 'suffix' => '.zip',
 206                 'format' => 'zip'},
 207 );
 208
 209 # Aliases so we understand old gitweb.snapshot values in repository
 210 # configuration.
 211 our %known_snapshot_format_aliases = (
 212         'gzip'  => 'tgz',
 213         'bzip2' => 'tbz2',
 214         'xz'    => 'txz',
 215
 216         # backward compatibility: legacy gitweb config support
 217         'x-gzip' => undef, 'gz' => undef,
 218         'x-bzip2' => undef, 'bz2' => undef,
 219         'x-zip' => undef, '' => undef,
 220 );
 221
 222 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 223 # are changed, it may be appropriate to change these values too via
 224 # $GITWEB_CONFIG.
 225 our %avatar_size = (
 226         'default' => 16,
 227         'double'  => 32
 228 );
 229
 230 # Used to set the maximum load that we will still respond to gitweb queries.
 231 # If server load exceed this value then return "503 server busy" error.
 232 # If gitweb cannot determined server load, it is taken to be 0.
 233 # Leave it undefined (or set to 'undef') to turn off load checking.
 234 our $maxload = 300;
 235
 236 # configuration for 'highlight' (http://www.andre-simon.de/)
 237 # match by basename
 238 our %highlight_basename = (
 239         #'Program' => 'py',
 240         #'Library' => 'py',
 241         'SConstruct' => 'py', # SCons equivalent of Makefile
 242         'Makefile' => 'make',
 243 );
 244 # match by extension
 245 our %highlight_ext = (
 246         # main extensions, defining name of syntax;
 247         # see files in /usr/share/highlight/langDefs/ directory
 248         map { $_ => $_ }
 249                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 250         # alternate extensions, see /etc/highlight/filetypes.conf
 251         'h' => 'c',
 252         map { $_ => 'cpp' } qw(cxx c++ cc),
 253         map { $_ => 'php' } qw(php3 php4),
 254         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 255         'mak' => 'make',
 256         map { $_ => 'xml' } qw(xhtml html htm),
 257 );
 258
 259 # You define site-wide feature defaults here; override them with
 260 # $GITWEB_CONFIG as necessary.
 261 our %feature = (
 262         # feature => {
 263         #       'sub' => feature-sub (subroutine),
 264         #       'override' => allow-override (boolean),
 265         #       'default' => [ default options...] (array reference)}
 266         #
 267         # if feature is overridable (it means that allow-override has true value),
 268         # then feature-sub will be called with default options as parameters;
 269         # return value of feature-sub indicates if to enable specified feature
 270         #
 271         # if there is no 'sub' key (no feature-sub), then feature cannot be
 272         # overridden
 273         #
 274         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 275         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 276         # is enabled
 277
 278         # Enable the 'blame' blob view, showing the last commit that modified
 279         # each line in the file. This can be very CPU-intensive.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'blame'}{'default'} = [1];
 283         # To have project specific config enable override in $GITWEB_CONFIG
 284         # $feature{'blame'}{'override'} = 1;
 285         # and in project config gitweb.blame = 0|1;
 286         'blame' => {
 287                 'sub' => sub { feature_bool('blame', @_) },
 288                 'override' => 0,
 289                 'default' => [0]},
 290
 291         # Enable the 'snapshot' link, providing a compressed archive of any
 292         # tree. This can potentially generate high traffic if you have large
 293         # project.
 294
 295         # Value is a list of formats defined in %known_snapshot_formats that
 296         # you wish to offer.
 297         # To disable system wide have in $GITWEB_CONFIG
 298         # $feature{'snapshot'}{'default'} = [];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'snapshot'}{'override'} = 1;
 301         # and in project config, a comma-separated list of formats or "none"
 302         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 303         'snapshot' => {
 304                 'sub' => \&feature_snapshot,
 305                 'override' => 0,
 306                 'default' => ['tgz']},
 307
 308         # Enable text search, which will list the commits which match author,
 309         # committer or commit text to a given string.  Enabled by default.
 310         # Project specific override is not supported.
 311         'search' => {
 312                 'override' => 0,
 313                 'default' => [1]},
 314
 315         # Enable grep search, which will list the files in currently selected
 316         # tree containing the given string. Enabled by default. This can be
 317         # potentially CPU-intensive, of course.
 318
 319         # To enable system wide have in $GITWEB_CONFIG
 320         # $feature{'grep'}{'default'} = [1];
 321         # To have project specific config enable override in $GITWEB_CONFIG
 322         # $feature{'grep'}{'override'} = 1;
 323         # and in project config gitweb.grep = 0|1;
 324         'grep' => {
 325                 'sub' => sub { feature_bool('grep', @_) },
 326                 'override' => 0,
 327                 'default' => [1]},
 328
 329         # Enable the pickaxe search, which will list the commits that modified
 330         # a given string in a file. This can be practical and quite faster
 331         # alternative to 'blame', but still potentially CPU-intensive.
 332
 333         # To enable system wide have in $GITWEB_CONFIG
 334         # $feature{'pickaxe'}{'default'} = [1];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'pickaxe'}{'override'} = 1;
 337         # and in project config gitweb.pickaxe = 0|1;
 338         'pickaxe' => {
 339                 'sub' => sub { feature_bool('pickaxe', @_) },
 340                 'override' => 0,
 341                 'default' => [1]},
 342
 343         # Enable showing size of blobs in a 'tree' view, in a separate
 344         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 345
 346         # To disable system wide have in $GITWEB_CONFIG
 347         # $feature{'show-sizes'}{'default'} = [0];
 348         # To have project specific config enable override in $GITWEB_CONFIG
 349         # $feature{'show-sizes'}{'override'} = 1;
 350         # and in project config gitweb.showsizes = 0|1;
 351         'show-sizes' => {
 352                 'sub' => sub { feature_bool('showsizes', @_) },
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Make gitweb use an alternative format of the URLs which can be
 357         # more readable and natural-looking: project name is embedded
 358         # directly in the path and the query string contains other
 359         # auxiliary information. All gitweb installations recognize
 360         # URL in either format; this configures in which formats gitweb
 361         # generates links.
 362
 363         # To enable system wide have in $GITWEB_CONFIG
 364         # $feature{'pathinfo'}{'default'} = [1];
 365         # Project specific override is not supported.
 366
 367         # Note that you will need to change the default location of CSS,
 368         # favicon, logo and possibly other files to an absolute URL. Also,
 369         # if gitweb.cgi serves as your indexfile, you will need to force
 370         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 371         'pathinfo' => {
 372                 'override' => 0,
 373                 'default' => [0]},
 374
 375         # Make gitweb consider projects in project root subdirectories
 376         # to be forks of existing projects. Given project $projname.git,
 377         # projects matching $projname/*.git will not be shown in the main
 378         # projects list, instead a '+' mark will be added to $projname
 379         # there and a 'forks' view will be enabled for the project, listing
 380         # all the forks. If project list is taken from a file, forks have
 381         # to be listed after the main project.
 382
 383         # To enable system wide have in $GITWEB_CONFIG
 384         # $feature{'forks'}{'default'} = [1];
 385         # Project specific override is not supported.
 386         'forks' => {
 387                 'override' => 0,
 388                 'default' => [0]},
 389
 390         # Insert custom links to the action bar of all project pages.
 391         # This enables you mainly to link to third-party scripts integrating
 392         # into gitweb; e.g. git-browser for graphical history representation
 393         # or custom web-based repository administration interface.
 394
 395         # The 'default' value consists of a list of triplets in the form
 396         # (label, link, position) where position is the label after which
 397         # to insert the link and link is a format string where %n expands
 398         # to the project name, %f to the project path within the filesystem,
 399         # %h to the current hash (h gitweb parameter) and %b to the current
 400         # hash base (hb gitweb parameter); %% expands to %.
 401
 402         # To enable system wide have in $GITWEB_CONFIG e.g.
 403         # $feature{'actions'}{'default'} = [('graphiclog',
 404         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 405         # Project specific override is not supported.
 406         'actions' => {
 407                 'override' => 0,
 408                 'default' => []},
 409
 410         # Allow gitweb scan project content tags described in ctags/
 411         # of project repository, and display the popular Web 2.0-ish
 412         # "tag cloud" near the project list. Note that this is something
 413         # COMPLETELY different from the normal Git tags.
 414
 415         # gitweb by itself can show existing tags, but it does not handle
 416         # tagging itself; you need an external application for that.
 417         # For an example script, check Girocco's cgi/tagproj.cgi.
 418         # You may want to install the HTML::TagCloud Perl module to get
 419         # a pretty tag cloud instead of just a list of tags.
 420
 421         # To enable system wide have in $GITWEB_CONFIG
 422         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 423         # Project specific override is not supported.
 424         'ctags' => {
 425                 'override' => 0,
 426                 'default' => [0]},
 427
 428         # The maximum number of patches in a patchset generated in patch
 429         # view. Set this to 0 or undef to disable patch view, or to a
 430         # negative number to remove any limit.
 431
 432         # To disable system wide have in $GITWEB_CONFIG
 433         # $feature{'patches'}{'default'} = [0];
 434         # To have project specific config enable override in $GITWEB_CONFIG
 435         # $feature{'patches'}{'override'} = 1;
 436         # and in project config gitweb.patches = 0|n;
 437         # where n is the maximum number of patches allowed in a patchset.
 438         'patches' => {
 439                 'sub' => \&feature_patches,
 440                 'override' => 0,
 441                 'default' => [16]},
 442
 443         # Avatar support. When this feature is enabled, views such as
 444         # shortlog or commit will display an avatar associated with
 445         # the email of the committer(s) and/or author(s).
 446
 447         # Currently available providers are gravatar and picon.
 448         # If an unknown provider is specified, the feature is disabled.
 449
 450         # Gravatar depends on Digest::MD5.
 451         # Picon currently relies on the indiana.edu database.
 452
 453         # To enable system wide have in $GITWEB_CONFIG
 454         # $feature{'avatar'}{'default'} = ['<provider>'];
 455         # where <provider> is either gravatar or picon.
 456         # To have project specific config enable override in $GITWEB_CONFIG
 457         # $feature{'avatar'}{'override'} = 1;
 458         # and in project config gitweb.avatar = <provider>;
 459         'avatar' => {
 460                 'sub' => \&feature_avatar,
 461                 'override' => 0,
 462                 'default' => ['']},
 463
 464         # Enable displaying how much time and how many git commands
 465         # it took to generate and display page.  Disabled by default.
 466         # Project specific override is not supported.
 467         'timed' => {
 468                 'override' => 0,
 469                 'default' => [0]},
 470
 471         # Enable turning some links into links to actions which require
 472         # JavaScript to run (like 'blame_incremental').  Not enabled by
 473         # default.  Project specific override is currently not supported.
 474         'javascript-actions' => {
 475                 'override' => 0,
 476                 'default' => [0]},
 477
 478         # Syntax highlighting support. This is based on Daniel Svensson's
 479         # and Sham Chukoury's work in gitweb-xmms2.git.
 480         # It requires the 'highlight' program present in $PATH,
 481         # and therefore is disabled by default.
 482
 483         # To enable system wide have in $GITWEB_CONFIG
 484         # $feature{'highlight'}{'default'} = [1];
 485
 486         'highlight' => {
 487                 'sub' => sub { feature_bool('highlight', @_) },
 488                 'override' => 0,
 489                 'default' => [0]},
 490 );
 491
 492 sub gitweb_get_feature {
 493         my ($name) = @_;
 494         return unless exists $feature{$name};
 495         my ($sub, $override, @defaults) = (
 496                 $feature{$name}{'sub'},
 497                 $feature{$name}{'override'},
 498                 @{$feature{$name}{'default'}});
 499         # project specific override is possible only if we have project
 500         our $git_dir; # global variable, declared later
 501         if (!$override || !defined $git_dir) {
 502                 return @defaults;
 503         }
 504         if (!defined $sub) {
 505                 warn "feature $name is not overridable";
 506                 return @defaults;
 507         }
 508         return $sub->(@defaults);
 509 }
 510
 511 # A wrapper to check if a given feature is enabled.
 512 # With this, you can say
 513 #
 514 #   my $bool_feat = gitweb_check_feature('bool_feat');
 515 #   gitweb_check_feature('bool_feat') or somecode;
 516 #
 517 # instead of
 518 #
 519 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 520 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 521 #
 522 sub gitweb_check_feature {
 523         return (gitweb_get_feature(@_))[0];
 524 }
 525
 526
 527 sub feature_bool {
 528         my $key = shift;
 529         my ($val) = git_get_project_config($key, '--bool');
 530
 531         if (!defined $val) {
 532                 return ($_[0]);
 533         } elsif ($val eq 'true') {
 534                 return (1);
 535         } elsif ($val eq 'false') {
 536                 return (0);
 537         }
 538 }
 539
 540 sub feature_snapshot {
 541         my (@fmts) = @_;
 542
 543         my ($val) = git_get_project_config('snapshot');
 544
 545         if ($val) {
 546                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 547         }
 548
 549         return @fmts;
 550 }
 551
 552 sub feature_patches {
 553         my @val = (git_get_project_config('patches', '--int'));
 554
 555         if (@val) {
 556                 return @val;
 557         }
 558
 559         return ($_[0]);
 560 }
 561
 562 sub feature_avatar {
 563         my @val = (git_get_project_config('avatar'));
 564
 565         return @val ? @val : @_;
 566 }
 567
 568 # checking HEAD file with -e is fragile if the repository was
 569 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 570 # and then pruned.
 571 sub check_head_link {
 572         my ($dir) = @_;
 573         my $headfile = "$dir/HEAD";
 574         return ((-e $headfile) ||
 575                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 576 }
 577
 578 sub check_export_ok {
 579         my ($dir) = @_;
 580         return (check_head_link($dir) &&
 581                 (!$export_ok || -e "$dir/$export_ok") &&
 582                 (!$export_auth_hook || $export_auth_hook->($dir)));
 583 }
 584
 585 # process alternate names for backward compatibility
 586 # filter out unsupported (unknown) snapshot formats
 587 sub filter_snapshot_fmts {
 588         my @fmts = @_;
 589
 590         @fmts = map {
 591                 exists $known_snapshot_format_aliases{$_} ?
 592                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 593         @fmts = grep {
 594                 exists $known_snapshot_formats{$_} &&
 595                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 596 }
 597
 598 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 599 sub evaluate_gitweb_config {
 600         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 601         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 602         # die if there are errors parsing config file
 603         if (-e $GITWEB_CONFIG) {
 604                 do $GITWEB_CONFIG;
 605                 die $@ if $@;
 606         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 607                 do $GITWEB_CONFIG_SYSTEM;
 608                 die $@ if $@;
 609         }
 610 }
 611
 612 # Get loadavg of system, to compare against $maxload.
 613 # Currently it requires '/proc/loadavg' present to get loadavg;
 614 # if it is not present it returns 0, which means no load checking.
 615 sub get_loadavg {
 616         if( -e '/proc/loadavg' ){
 617                 open my $fd, '<', '/proc/loadavg'
 618                         or return 0;
 619                 my @load = split(/\s+/, scalar <$fd>);
 620                 close $fd;
 621
 622                 # The first three columns measure CPU and IO utilization of the last one,
 623                 # five, and 10 minute periods.  The fourth column shows the number of
 624                 # currently running processes and the total number of processes in the m/n
 625                 # format.  The last column displays the last process ID used.
 626                 return $load[0] || 0;
 627         }
 628         # additional checks for load average should go here for things that don't export
 629         # /proc/loadavg
 630
 631         return 0;
 632 }
 633
 634 # version of the core git binary
 635 our $git_version;
 636 sub evaluate_git_version {
 637         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 638         $number_of_git_cmds++;
 639 }
 640
 641 sub check_loadavg {
 642         if (defined $maxload && get_loadavg() > $maxload) {
 643                 die_error(503, "The load average on the server is too high");
 644         }
 645 }
 646
 647 # ======================================================================
 648 # input validation and dispatch
 649
 650 # input parameters can be collected from a variety of sources (presently, CGI
 651 # and PATH_INFO), so we define an %input_params hash that collects them all
 652 # together during validation: this allows subsequent uses (e.g. href()) to be
 653 # agnostic of the parameter origin
 654
 655 our %input_params = ();
 656
 657 # input parameters are stored with the long parameter name as key. This will
 658 # also be used in the href subroutine to convert parameters to their CGI
 659 # equivalent, and since the href() usage is the most frequent one, we store
 660 # the name -> CGI key mapping here, instead of the reverse.
 661 #
 662 # XXX: Warning: If you touch this, check the search form for updating,
 663 # too.
 664
 665 our @cgi_param_mapping = (
 666         project => "p",
 667         action => "a",
 668         file_name => "f",
 669         file_parent => "fp",
 670         hash => "h",
 671         hash_parent => "hp",
 672         hash_base => "hb",
 673         hash_parent_base => "hpb",
 674         page => "pg",
 675         order => "o",
 676         searchtext => "s",
 677         searchtype => "st",
 678         snapshot_format => "sf",
 679         extra_options => "opt",
 680         search_use_regexp => "sr",
 681         # this must be last entry (for manipulation from JavaScript)
 682         javascript => "js"
 683 );
 684 our %cgi_param_mapping = @cgi_param_mapping;
 685
 686 # we will also need to know the possible actions, for validation
 687 our %actions = (
 688         "blame" => \&git_blame,
 689         "blame_incremental" => \&git_blame_incremental,
 690         "blame_data" => \&git_blame_data,
 691         "blobdiff" => \&git_blobdiff,
 692         "blobdiff_plain" => \&git_blobdiff_plain,
 693         "blob" => \&git_blob,
 694         "blob_plain" => \&git_blob_plain,
 695         "commitdiff" => \&git_commitdiff,
 696         "commitdiff_plain" => \&git_commitdiff_plain,
 697         "commit" => \&git_commit,
 698         "forks" => \&git_forks,
 699         "heads" => \&git_heads,
 700         "history" => \&git_history,
 701         "log" => \&git_log,
 702         "patch" => \&git_patch,
 703         "patches" => \&git_patches,
 704         "rss" => \&git_rss,
 705         "atom" => \&git_atom,
 706         "search" => \&git_search,
 707         "search_help" => \&git_search_help,
 708         "shortlog" => \&git_shortlog,
 709         "summary" => \&git_summary,
 710         "tag" => \&git_tag,
 711         "tags" => \&git_tags,
 712         "tree" => \&git_tree,
 713         "snapshot" => \&git_snapshot,
 714         "object" => \&git_object,
 715         # those below don't need $project
 716         "opml" => \&git_opml,
 717         "project_list" => \&git_project_list,
 718         "project_index" => \&git_project_index,
 719 );
 720
 721 # finally, we have the hash of allowed extra_options for the commands that
 722 # allow them
 723 our %allowed_options = (
 724         "--no-merges" => [ qw(rss atom log shortlog history) ],
 725 );
 726
 727 # fill %input_params with the CGI parameters. All values except for 'opt'
 728 # should be single values, but opt can be an array. We should probably
 729 # build an array of parameters that can be multi-valued, but since for the time
 730 # being it's only this one, we just single it out
 731 sub evaluate_query_params {
 732         our $cgi;
 733
 734         while (my ($name, $symbol) = each %cgi_param_mapping) {
 735                 if ($symbol eq 'opt') {
 736                         $input_params{$name} = [ $cgi->param($symbol) ];
 737                 } else {
 738                         $input_params{$name} = $cgi->param($symbol);
 739                 }
 740         }
 741 }
 742
 743 # now read PATH_INFO and update the parameter list for missing parameters
 744 sub evaluate_path_info {
 745         return if defined $input_params{'project'};
 746         return if !$path_info;
 747         $path_info =~ s,^/+,,;
 748         return if !$path_info;
 749
 750         # find which part of PATH_INFO is project
 751         my $project = $path_info;
 752         $project =~ s,/+$,,;
 753         while ($project && !check_head_link("$projectroot/$project")) {
 754                 $project =~ s,/*[^/]*$,,;
 755         }
 756         return unless $project;
 757         $input_params{'project'} = $project;
 758
 759         # do not change any parameters if an action is given using the query string
 760         return if $input_params{'action'};
 761         $path_info =~ s,^\Q$project\E/*,,;
 762
 763         # next, check if we have an action
 764         my $action = $path_info;
 765         $action =~ s,/.*$,,;
 766         if (exists $actions{$action}) {
 767                 $path_info =~ s,^$action/*,,;
 768                 $input_params{'action'} = $action;
 769         }
 770
 771         # list of actions that want hash_base instead of hash, but can have no
 772         # pathname (f) parameter
 773         my @wants_base = (
 774                 'tree',
 775                 'history',
 776         );
 777
 778         # we want to catch
 779         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 780         my ($parentrefname, $parentpathname, $refname, $pathname) =
 781                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 782
 783         # first, analyze the 'current' part
 784         if (defined $pathname) {
 785                 # we got "branch:filename" or "branch:dir/"
 786                 # we could use git_get_type(branch:pathname), but:
 787                 # - it needs $git_dir
 788                 # - it does a git() call
 789                 # - the convention of terminating directories with a slash
 790                 #   makes it superfluous
 791                 # - embedding the action in the PATH_INFO would make it even
 792                 #   more superfluous
 793                 $pathname =~ s,^/+,,;
 794                 if (!$pathname || substr($pathname, -1) eq "/") {
 795                         $input_params{'action'} ||= "tree";
 796                         $pathname =~ s,/$,,;
 797                 } else {
 798                         # the default action depends on whether we had parent info
 799                         # or not
 800                         if ($parentrefname) {
 801                                 $input_params{'action'} ||= "blobdiff_plain";
 802                         } else {
 803                                 $input_params{'action'} ||= "blob_plain";
 804                         }
 805                 }
 806                 $input_params{'hash_base'} ||= $refname;
 807                 $input_params{'file_name'} ||= $pathname;
 808         } elsif (defined $refname) {
 809                 # we got "branch". In this case we have to choose if we have to
 810                 # set hash or hash_base.
 811                 #
 812                 # Most of the actions without a pathname only want hash to be
 813                 # set, except for the ones specified in @wants_base that want
 814                 # hash_base instead. It should also be noted that hand-crafted
 815                 # links having 'history' as an action and no pathname or hash
 816                 # set will fail, but that happens regardless of PATH_INFO.
 817                 $input_params{'action'} ||= "shortlog";
 818                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 819                         $input_params{'hash_base'} ||= $refname;
 820                 } else {
 821                         $input_params{'hash'} ||= $refname;
 822                 }
 823         }
 824
 825         # next, handle the 'parent' part, if present
 826         if (defined $parentrefname) {
 827                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 828                 # someproject/blobdiff/oldrev..newrev:/filename
 829                 if ($parentpathname) {
 830                         $parentpathname =~ s,^/+,,;
 831                         $parentpathname =~ s,/$,,;
 832                         $input_params{'file_parent'} ||= $parentpathname;
 833                 } else {
 834                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 835                 }
 836                 # we assume that hash_parent_base is wanted if a path was specified,
 837                 # or if the action wants hash_base instead of hash
 838                 if (defined $input_params{'file_parent'} ||
 839                         grep { $_ eq $input_params{'action'} } @wants_base) {
 840                         $input_params{'hash_parent_base'} ||= $parentrefname;
 841                 } else {
 842                         $input_params{'hash_parent'} ||= $parentrefname;
 843                 }
 844         }
 845
 846         # for the snapshot action, we allow URLs in the form
 847         # $project/snapshot/$hash.ext
 848         # where .ext determines the snapshot and gets removed from the
 849         # passed $refname to provide the $hash.
 850         #
 851         # To be able to tell that $refname includes the format extension, we
 852         # require the following two conditions to be satisfied:
 853         # - the hash input parameter MUST have been set from the $refname part
 854         #   of the URL (i.e. they must be equal)
 855         # - the snapshot format MUST NOT have been defined already (e.g. from
 856         #   CGI parameter sf)
 857         # It's also useless to try any matching unless $refname has a dot,
 858         # so we check for that too
 859         if (defined $input_params{'action'} &&
 860                 $input_params{'action'} eq 'snapshot' &&
 861                 defined $refname && index($refname, '.') != -1 &&
 862                 $refname eq $input_params{'hash'} &&
 863                 !defined $input_params{'snapshot_format'}) {
 864                 # We loop over the known snapshot formats, checking for
 865                 # extensions. Allowed extensions are both the defined suffix
 866                 # (which includes the initial dot already) and the snapshot
 867                 # format key itself, with a prepended dot
 868                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 869                         my $hash = $refname;
 870                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 871                                 next;
 872                         }
 873                         my $sfx = $1;
 874                         # a valid suffix was found, so set the snapshot format
 875                         # and reset the hash parameter
 876                         $input_params{'snapshot_format'} = $fmt;
 877                         $input_params{'hash'} = $hash;
 878                         # we also set the format suffix to the one requested
 879                         # in the URL: this way a request for e.g. .tgz returns
 880                         # a .tgz instead of a .tar.gz
 881                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 882                         last;
 883                 }
 884         }
 885 }
 886
 887 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 888      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 889      $searchtext, $search_regexp);
 890 sub evaluate_and_validate_params {
 891         our $action = $input_params{'action'};
 892         if (defined $action) {
 893                 if (!validate_action($action)) {
 894                         die_error(400, "Invalid action parameter");
 895                 }
 896         }
 897
 898         # parameters which are pathnames
 899         our $project = $input_params{'project'};
 900         if (defined $project) {
 901                 if (!validate_project($project)) {
 902                         undef $project;
 903                         die_error(404, "No such project");
 904                 }
 905         }
 906
 907         our $file_name = $input_params{'file_name'};
 908         if (defined $file_name) {
 909                 if (!validate_pathname($file_name)) {
 910                         die_error(400, "Invalid file parameter");
 911                 }
 912         }
 913
 914         our $file_parent = $input_params{'file_parent'};
 915         if (defined $file_parent) {
 916                 if (!validate_pathname($file_parent)) {
 917                         die_error(400, "Invalid file parent parameter");
 918                 }
 919         }
 920
 921         # parameters which are refnames
 922         our $hash = $input_params{'hash'};
 923         if (defined $hash) {
 924                 if (!validate_refname($hash)) {
 925                         die_error(400, "Invalid hash parameter");
 926                 }
 927         }
 928
 929         our $hash_parent = $input_params{'hash_parent'};
 930         if (defined $hash_parent) {
 931                 if (!validate_refname($hash_parent)) {
 932                         die_error(400, "Invalid hash parent parameter");
 933                 }
 934         }
 935
 936         our $hash_base = $input_params{'hash_base'};
 937         if (defined $hash_base) {
 938                 if (!validate_refname($hash_base)) {
 939                         die_error(400, "Invalid hash base parameter");
 940                 }
 941         }
 942
 943         our @extra_options = @{$input_params{'extra_options'}};
 944         # @extra_options is always defined, since it can only be (currently) set from
 945         # CGI, and $cgi->param() returns the empty array in array context if the param
 946         # is not set
 947         foreach my $opt (@extra_options) {
 948                 if (not exists $allowed_options{$opt}) {
 949                         die_error(400, "Invalid option parameter");
 950                 }
 951                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 952                         die_error(400, "Invalid option parameter for this action");
 953                 }
 954         }
 955
 956         our $hash_parent_base = $input_params{'hash_parent_base'};
 957         if (defined $hash_parent_base) {
 958                 if (!validate_refname($hash_parent_base)) {
 959                         die_error(400, "Invalid hash parent base parameter");
 960                 }
 961         }
 962
 963         # other parameters
 964         our $page = $input_params{'page'};
 965         if (defined $page) {
 966                 if ($page =~ m/[^0-9]/) {
 967                         die_error(400, "Invalid page parameter");
 968                 }
 969         }
 970
 971         our $searchtype = $input_params{'searchtype'};
 972         if (defined $searchtype) {
 973                 if ($searchtype =~ m/[^a-z]/) {
 974                         die_error(400, "Invalid searchtype parameter");
 975                 }
 976         }
 977
 978         our $search_use_regexp = $input_params{'search_use_regexp'};
 979
 980         our $searchtext = $input_params{'searchtext'};
 981         our $search_regexp;
 982         if (defined $searchtext) {
 983                 if (length($searchtext) < 2) {
 984                         die_error(403, "At least two characters are required for search parameter");
 985                 }
 986                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 987         }
 988 }
 989
 990 # path to the current git repository
 991 our $git_dir;
 992 sub evaluate_git_dir {
 993         our $git_dir = "$projectroot/$project" if $project;
 994 }
 995
 996 our (@snapshot_fmts, $git_avatar);
 997 sub configure_gitweb_features {
 998         # list of supported snapshot formats
 999         our @snapshot_fmts = gitweb_get_feature('snapshot');
1000         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1001
1002         # check that the avatar feature is set to a known provider name,
1003         # and for each provider check if the dependencies are satisfied.
1004         # if the provider name is invalid or the dependencies are not met,
1005         # reset $git_avatar to the empty string.
1006         our ($git_avatar) = gitweb_get_feature('avatar');
1007         if ($git_avatar eq 'gravatar') {
1008                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1009         } elsif ($git_avatar eq 'picon') {
1010                 # no dependencies
1011         } else {
1012                 $git_avatar = '';
1013         }
1014 }
1015
1016 # custom error handler: 'die <message>' is Internal Server Error
1017 sub handle_errors_html {
1018         my $msg = shift; # it is already HTML escaped
1019
1020         # to avoid infinite loop where error occurs in die_error,
1021         # change handler to default handler, disabling handle_errors_html
1022         set_message("Error occured when inside die_error:\n$msg");
1023
1024         # you cannot jump out of die_error when called as error handler;
1025         # the subroutine set via CGI::Carp::set_message is called _after_
1026         # HTTP headers are already written, so it cannot write them itself
1027         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1028 }
1029 set_message(\&handle_errors_html);
1030
1031 # dispatch
1032 sub dispatch {
1033         if (!defined $action) {
1034                 if (defined $hash) {
1035                         $action = git_get_type($hash);
1036                 } elsif (defined $hash_base && defined $file_name) {
1037                         $action = git_get_type("$hash_base:$file_name");
1038                 } elsif (defined $project) {
1039                         $action = 'summary';
1040                 } else {
1041                         $action = 'project_list';
1042                 }
1043         }
1044         if (!defined($actions{$action})) {
1045                 die_error(400, "Unknown action");
1046         }
1047         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1048             !$project) {
1049                 die_error(400, "Project needed");
1050         }
1051         $actions{$action}->();
1052 }
1053
1054 sub reset_timer {
1055         our $t0 = [Time::HiRes::gettimeofday()]
1056                 if defined $t0;
1057         our $number_of_git_cmds = 0;
1058 }
1059
1060 sub run_request {
1061         reset_timer();
1062
1063         evaluate_uri();
1064         evaluate_gitweb_config();
1065         check_loadavg();
1066
1067         # $projectroot and $projects_list might be set in gitweb config file
1068         $projects_list ||= $projectroot;
1069
1070         evaluate_query_params();
1071         evaluate_path_info();
1072         evaluate_and_validate_params();
1073         evaluate_git_dir();
1074
1075         configure_gitweb_features();
1076
1077         dispatch();
1078 }
1079
1080 our $is_last_request = sub { 1 };
1081 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1082 our $CGI = 'CGI';
1083 our $cgi;
1084 sub configure_as_fcgi {
1085         require CGI::Fast;
1086         our $CGI = 'CGI::Fast';
1087
1088         my $request_number = 0;
1089         # let each child service 100 requests
1090         our $is_last_request = sub { ++$request_number > 100 };
1091 }
1092 sub evaluate_argv {
1093         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1094         configure_as_fcgi()
1095                 if $script_name =~ /\.fcgi$/;
1096
1097         return unless (@ARGV);
1098
1099         require Getopt::Long;
1100         Getopt::Long::GetOptions(
1101                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1102                 'nproc|n=i' => sub {
1103                         my ($arg, $val) = @_;
1104                         return unless eval { require FCGI::ProcManager; 1; };
1105                         my $proc_manager = FCGI::ProcManager->new({
1106                                 n_processes => $val,
1107                         });
1108                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1109                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1110                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1111                 },
1112         );
1113 }
1114
1115 sub run {
1116         evaluate_argv();
1117         evaluate_git_version();
1118
1119         $pre_listen_hook->()
1120                 if $pre_listen_hook;
1121
1122  REQUEST:
1123         while ($cgi = $CGI->new()) {
1124                 $pre_dispatch_hook->()
1125                         if $pre_dispatch_hook;
1126
1127                 run_request();
1128
1129                 $post_dispatch_hook->()
1130                         if $post_dispatch_hook;
1131
1132                 last REQUEST if ($is_last_request->());
1133         }
1134
1135  DONE_GITWEB:
1136         1;
1137 }
1138
1139 run();
1140
1141 if (defined caller) {
1142         # wrapped in a subroutine processing requests,
1143         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1144         return;
1145 } else {
1146         # pure CGI script, serving single request
1147         exit;
1148 }
1149
1150 ## ======================================================================
1151 ## action links
1152
1153 # possible values of extra options
1154 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1155 # -replay => 1      - start from a current view (replay with modifications)
1156 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1157 sub href {
1158         my %params = @_;
1159         # default is to use -absolute url() i.e. $my_uri
1160         my $href = $params{-full} ? $my_url : $my_uri;
1161
1162         $params{'project'} = $project unless exists $params{'project'};
1163
1164         if ($params{-replay}) {
1165                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1166                         if (!exists $params{$name}) {
1167                                 $params{$name} = $input_params{$name};
1168                         }
1169                 }
1170         }
1171
1172         my $use_pathinfo = gitweb_check_feature('pathinfo');
1173         if (defined $params{'project'} &&
1174             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1175                 # try to put as many parameters as possible in PATH_INFO:
1176                 #   - project name
1177                 #   - action
1178                 #   - hash_parent or hash_parent_base:/file_parent
1179                 #   - hash or hash_base:/filename
1180                 #   - the snapshot_format as an appropriate suffix
1181
1182                 # When the script is the root DirectoryIndex for the domain,
1183                 # $href here would be something like http://gitweb.example.com/
1184                 # Thus, we strip any trailing / from $href, to spare us double
1185                 # slashes in the final URL
1186                 $href =~ s,/$,,;
1187
1188                 # Then add the project name, if present
1189                 $href .= "/".esc_path_info($params{'project'});
1190                 delete $params{'project'};
1191
1192                 # since we destructively absorb parameters, we keep this
1193                 # boolean that remembers if we're handling a snapshot
1194                 my $is_snapshot = $params{'action'} eq 'snapshot';
1195
1196                 # Summary just uses the project path URL, any other action is
1197                 # added to the URL
1198                 if (defined $params{'action'}) {
1199                         $href .= "/".esc_path_info($params{'action'})
1200                                 unless $params{'action'} eq 'summary';
1201                         delete $params{'action'};
1202                 }
1203
1204                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1205                 # stripping nonexistent or useless pieces
1206                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1207                         || $params{'hash_parent'} || $params{'hash'});
1208                 if (defined $params{'hash_base'}) {
1209                         if (defined $params{'hash_parent_base'}) {
1210                                 $href .= esc_path_info($params{'hash_parent_base'});
1211                                 # skip the file_parent if it's the same as the file_name
1212                                 if (defined $params{'file_parent'}) {
1213                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1214                                                 delete $params{'file_parent'};
1215                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1216                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1217                                                 delete $params{'file_parent'};
1218                                         }
1219                                 }
1220                                 $href .= "..";
1221                                 delete $params{'hash_parent'};
1222                                 delete $params{'hash_parent_base'};
1223                         } elsif (defined $params{'hash_parent'}) {
1224                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1225                                 delete $params{'hash_parent'};
1226                         }
1227
1228                         $href .= esc_path_info($params{'hash_base'});
1229                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1230                                 $href .= ":/".esc_path_info($params{'file_name'});
1231                                 delete $params{'file_name'};
1232                         }
1233                         delete $params{'hash'};
1234                         delete $params{'hash_base'};
1235                 } elsif (defined $params{'hash'}) {
1236                         $href .= esc_path_info($params{'hash'});
1237                         delete $params{'hash'};
1238                 }
1239
1240                 # If the action was a snapshot, we can absorb the
1241                 # snapshot_format parameter too
1242                 if ($is_snapshot) {
1243                         my $fmt = $params{'snapshot_format'};
1244                         # snapshot_format should always be defined when href()
1245                         # is called, but just in case some code forgets, we
1246                         # fall back to the default
1247                         $fmt ||= $snapshot_fmts[0];
1248                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1249                         delete $params{'snapshot_format'};
1250                 }
1251         }
1252
1253         # now encode the parameters explicitly
1254         my @result = ();
1255         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1256                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1257                 if (defined $params{$name}) {
1258                         if (ref($params{$name}) eq "ARRAY") {
1259                                 foreach my $par (@{$params{$name}}) {
1260                                         push @result, $symbol . "=" . esc_param($par);
1261                                 }
1262                         } else {
1263                                 push @result, $symbol . "=" . esc_param($params{$name});
1264                         }
1265                 }
1266         }
1267         $href .= "?" . join(';', @result) if scalar @result;
1268
1269         # final transformation: trailing spaces must be escaped (URI-encoded)
1270         $href =~ s/(\s+)$/CGI::escape($1)/e;
1271
1272         return $href;
1273 }
1274
1275
1276 ## ======================================================================
1277 ## validation, quoting/unquoting and escaping
1278
1279 sub validate_action {
1280         my $input = shift || return undef;
1281         return undef unless exists $actions{$input};
1282         return $input;
1283 }
1284
1285 sub validate_project {
1286         my $input = shift || return undef;
1287         if (!validate_pathname($input) ||
1288                 !(-d "$projectroot/$input") ||
1289                 !check_export_ok("$projectroot/$input") ||
1290                 ($strict_export && !project_in_list($input))) {
1291                 return undef;
1292         } else {
1293                 return $input;
1294         }
1295 }
1296
1297 sub validate_pathname {
1298         my $input = shift || return undef;
1299
1300         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1301         # at the beginning, at the end, and between slashes.
1302         # also this catches doubled slashes
1303         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1304                 return undef;
1305         }
1306         # no null characters
1307         if ($input =~ m!\0!) {
1308                 return undef;
1309         }
1310         return $input;
1311 }
1312
1313 sub validate_refname {
1314         my $input = shift || return undef;
1315
1316         # textual hashes are O.K.
1317         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1318                 return $input;
1319         }
1320         # it must be correct pathname
1321         $input = validate_pathname($input)
1322                 or return undef;
1323         # restrictions on ref name according to git-check-ref-format
1324         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1325                 return undef;
1326         }
1327         return $input;
1328 }
1329
1330 # decode sequences of octets in utf8 into Perl's internal form,
1331 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1332 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1333 sub to_utf8 {
1334         my $str = shift;
1335         return undef unless defined $str;
1336         if (utf8::valid($str)) {
1337                 utf8::decode($str);
1338                 return $str;
1339         } else {
1340                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1341         }
1342 }
1343
1344 # quote unsafe chars, but keep the slash, even when it's not
1345 # correct, but quoted slashes look too horrible in bookmarks
1346 sub esc_param {
1347         my $str = shift;
1348         return undef unless defined $str;
1349         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1350         $str =~ s/ /\+/g;
1351         return $str;
1352 }
1353
1354 # the quoting rules for path_info fragment are slightly different
1355 sub esc_path_info {
1356         my $str = shift;
1357         return undef unless defined $str;
1358
1359         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1360         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1361
1362         return $str;
1363 }
1364
1365 # quote unsafe chars in whole URL, so some characters cannot be quoted
1366 sub esc_url {
1367         my $str = shift;
1368         return undef unless defined $str;
1369         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1370         $str =~ s/ /\+/g;
1371         return $str;
1372 }
1373
1374 # quote unsafe characters in HTML attributes
1375 sub esc_attr {
1376
1377         # for XHTML conformance escaping '"' to '&quot;' is not enough
1378         return esc_html(@_);
1379 }
1380
1381 # replace invalid utf8 character with SUBSTITUTION sequence
1382 sub esc_html {
1383         my $str = shift;
1384         my %opts = @_;
1385
1386         return undef unless defined $str;
1387
1388         $str = to_utf8($str);
1389         $str = $cgi->escapeHTML($str);
1390         if ($opts{'-nbsp'}) {
1391                 $str =~ s/ /&nbsp;/g;
1392         }
1393         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1394         return $str;
1395 }
1396
1397 # quote control characters and escape filename to HTML
1398 sub esc_path {
1399         my $str = shift;
1400         my %opts = @_;
1401
1402         return undef unless defined $str;
1403
1404         $str = to_utf8($str);
1405         $str = $cgi->escapeHTML($str);
1406         if ($opts{'-nbsp'}) {
1407                 $str =~ s/ /&nbsp;/g;
1408         }
1409         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1410         return $str;
1411 }
1412
1413 # Make control characters "printable", using character escape codes (CEC)
1414 sub quot_cec {
1415         my $cntrl = shift;
1416         my %opts = @_;
1417         my %es = ( # character escape codes, aka escape sequences
1418                 "\t" => '\t',   # tab            (HT)
1419                 "\n" => '\n',   # line feed      (LF)
1420                 "\r" => '\r',   # carrige return (CR)
1421                 "\f" => '\f',   # form feed      (FF)
1422                 "\b" => '\b',   # backspace      (BS)
1423                 "\a" => '\a',   # alarm (bell)   (BEL)
1424                 "\e" => '\e',   # escape         (ESC)
1425                 "\013" => '\v', # vertical tab   (VT)
1426                 "\000" => '\0', # nul character  (NUL)
1427         );
1428         my $chr = ( (exists $es{$cntrl})
1429                     ? $es{$cntrl}
1430                     : sprintf('\%2x', ord($cntrl)) );
1431         if ($opts{-nohtml}) {
1432                 return $chr;
1433         } else {
1434                 return "<span class=\"cntrl\">$chr</span>";
1435         }
1436 }
1437
1438 # Alternatively use unicode control pictures codepoints,
1439 # Unicode "printable representation" (PR)
1440 sub quot_upr {
1441         my $cntrl = shift;
1442         my %opts = @_;
1443
1444         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1445         if ($opts{-nohtml}) {
1446                 return $chr;
1447         } else {
1448                 return "<span class=\"cntrl\">$chr</span>";
1449         }
1450 }
1451
1452 # git may return quoted and escaped filenames
1453 sub unquote {
1454         my $str = shift;
1455
1456         sub unq {
1457                 my $seq = shift;
1458                 my %es = ( # character escape codes, aka escape sequences
1459                         't' => "\t",   # tab            (HT, TAB)
1460                         'n' => "\n",   # newline        (NL)
1461                         'r' => "\r",   # return         (CR)
1462                         'f' => "\f",   # form feed      (FF)
1463                         'b' => "\b",   # backspace      (BS)
1464                         'a' => "\a",   # alarm (bell)   (BEL)
1465                         'e' => "\e",   # escape         (ESC)
1466                         'v' => "\013", # vertical tab   (VT)
1467                 );
1468
1469                 if ($seq =~ m/^[0-7]{1,3}$/) {
1470                         # octal char sequence
1471                         return chr(oct($seq));
1472                 } elsif (exists $es{$seq}) {
1473                         # C escape sequence, aka character escape code
1474                         return $es{$seq};
1475                 }
1476                 # quoted ordinary character
1477                 return $seq;
1478         }
1479
1480         if ($str =~ m/^"(.*)"$/) {
1481                 # needs unquoting
1482                 $str = $1;
1483                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1484         }
1485         return $str;
1486 }
1487
1488 # escape tabs (convert tabs to spaces)
1489 sub untabify {
1490         my $line = shift;
1491
1492         while ((my $pos = index($line, "\t")) != -1) {
1493                 if (my $count = (8 - ($pos % 8))) {
1494                         my $spaces = ' ' x $count;
1495                         $line =~ s/\t/$spaces/;
1496                 }
1497         }
1498
1499         return $line;
1500 }
1501
1502 sub project_in_list {
1503         my $project = shift;
1504         my @list = git_get_projects_list();
1505         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1506 }
1507
1508 ## ----------------------------------------------------------------------
1509 ## HTML aware string manipulation
1510
1511 # Try to chop given string on a word boundary between position
1512 # $len and $len+$add_len. If there is no word boundary there,
1513 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1514 # (marking chopped part) would be longer than given string.
1515 sub chop_str {
1516         my $str = shift;
1517         my $len = shift;
1518         my $add_len = shift || 10;
1519         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1520
1521         # Make sure perl knows it is utf8 encoded so we don't
1522         # cut in the middle of a utf8 multibyte char.
1523         $str = to_utf8($str);
1524
1525         # allow only $len chars, but don't cut a word if it would fit in $add_len
1526         # if it doesn't fit, cut it if it's still longer than the dots we would add
1527         # remove chopped character entities entirely
1528
1529         # when chopping in the middle, distribute $len into left and right part
1530         # return early if chopping wouldn't make string shorter
1531         if ($where eq 'center') {
1532                 return $str if ($len + 5 >= length($str)); # filler is length 5
1533                 $len = int($len/2);
1534         } else {
1535                 return $str if ($len + 4 >= length($str)); # filler is length 4
1536         }
1537
1538         # regexps: ending and beginning with word part up to $add_len
1539         my $endre = qr/.{$len}\w{0,$add_len}/;
1540         my $begre = qr/\w{0,$add_len}.{$len}/;
1541
1542         if ($where eq 'left') {
1543                 $str =~ m/^(.*?)($begre)$/;
1544                 my ($lead, $body) = ($1, $2);
1545                 if (length($lead) > 4) {
1546                         $lead = " ...";
1547                 }
1548                 return "$lead$body";
1549
1550         } elsif ($where eq 'center') {
1551                 $str =~ m/^($endre)(.*)$/;
1552                 my ($left, $str)  = ($1, $2);
1553                 $str =~ m/^(.*?)($begre)$/;
1554                 my ($mid, $right) = ($1, $2);
1555                 if (length($mid) > 5) {
1556                         $mid = " ... ";
1557                 }
1558                 return "$left$mid$right";
1559
1560         } else {
1561                 $str =~ m/^($endre)(.*)$/;
1562                 my $body = $1;
1563                 my $tail = $2;
1564                 if (length($tail) > 4) {
1565                         $tail = "... ";
1566                 }
1567                 return "$body$tail";
1568         }
1569 }
1570
1571 # takes the same arguments as chop_str, but also wraps a <span> around the
1572 # result with a title attribute if it does get chopped. Additionally, the
1573 # string is HTML-escaped.
1574 sub chop_and_escape_str {
1575         my ($str) = @_;
1576
1577         my $chopped = chop_str(@_);
1578         if ($chopped eq $str) {
1579                 return esc_html($chopped);
1580         } else {
1581                 $str =~ s/[[:cntrl:]]/?/g;
1582                 return $cgi->span({-title=>$str}, esc_html($chopped));
1583         }
1584 }
1585
1586 ## ----------------------------------------------------------------------
1587 ## functions returning short strings
1588
1589 # CSS class for given age value (in seconds)
1590 sub age_class {
1591         my $age = shift;
1592
1593         if (!defined $age) {
1594                 return "noage";
1595         } elsif ($age < 60*60*2) {
1596                 return "age0";
1597         } elsif ($age < 60*60*24*2) {
1598                 return "age1";
1599         } else {
1600                 return "age2";
1601         }
1602 }
1603
1604 # convert age in seconds to "nn units ago" string
1605 sub age_string {
1606         my $age = shift;
1607         my $age_str;
1608
1609         if ($age > 60*60*24*365*2) {
1610                 $age_str = (int $age/60/60/24/365);
1611                 $age_str .= " years ago";
1612         } elsif ($age > 60*60*24*(365/12)*2) {
1613                 $age_str = int $age/60/60/24/(365/12);
1614                 $age_str .= " months ago";
1615         } elsif ($age > 60*60*24*7*2) {
1616                 $age_str = int $age/60/60/24/7;
1617                 $age_str .= " weeks ago";
1618         } elsif ($age > 60*60*24*2) {
1619                 $age_str = int $age/60/60/24;
1620                 $age_str .= " days ago";
1621         } elsif ($age > 60*60*2) {
1622                 $age_str = int $age/60/60;
1623                 $age_str .= " hours ago";
1624         } elsif ($age > 60*2) {
1625                 $age_str = int $age/60;
1626                 $age_str .= " min ago";
1627         } elsif ($age > 2) {
1628                 $age_str = int $age;
1629                 $age_str .= " sec ago";
1630         } else {
1631                 $age_str .= " right now";
1632         }
1633         return $age_str;
1634 }
1635
1636 use constant {
1637         S_IFINVALID => 0030000,
1638         S_IFGITLINK => 0160000,
1639 };
1640
1641 # submodule/subproject, a commit object reference
1642 sub S_ISGITLINK {
1643         my $mode = shift;
1644
1645         return (($mode & S_IFMT) == S_IFGITLINK)
1646 }
1647
1648 # convert file mode in octal to symbolic file mode string
1649 sub mode_str {
1650         my $mode = oct shift;
1651
1652         if (S_ISGITLINK($mode)) {
1653                 return 'm---------';
1654         } elsif (S_ISDIR($mode & S_IFMT)) {
1655                 return 'drwxr-xr-x';
1656         } elsif (S_ISLNK($mode)) {
1657                 return 'lrwxrwxrwx';
1658         } elsif (S_ISREG($mode)) {
1659                 # git cares only about the executable bit
1660                 if ($mode & S_IXUSR) {
1661                         return '-rwxr-xr-x';
1662                 } else {
1663                         return '-rw-r--r--';
1664                 };
1665         } else {
1666                 return '----------';
1667         }
1668 }
1669
1670 # convert file mode in octal to file type string
1671 sub file_type {
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                 return "file";
1688         } else {
1689                 return "unknown";
1690         }
1691 }
1692
1693 # convert file mode in octal to file type description string
1694 sub file_type_long {
1695         my $mode = shift;
1696
1697         if ($mode !~ m/^[0-7]+$/) {
1698                 return $mode;
1699         } else {
1700                 $mode = oct $mode;
1701         }
1702
1703         if (S_ISGITLINK($mode)) {
1704                 return "submodule";
1705         } elsif (S_ISDIR($mode & S_IFMT)) {
1706                 return "directory";
1707         } elsif (S_ISLNK($mode)) {
1708                 return "symlink";
1709         } elsif (S_ISREG($mode)) {
1710                 if ($mode & S_IXUSR) {
1711                         return "executable";
1712                 } else {
1713                         return "file";
1714                 };
1715         } else {
1716                 return "unknown";
1717         }
1718 }
1719
1720
1721 ## ----------------------------------------------------------------------
1722 ## functions returning short HTML fragments, or transforming HTML fragments
1723 ## which don't belong to other sections
1724
1725 # format line of commit message.
1726 sub format_log_line_html {
1727         my $line = shift;
1728
1729         $line = esc_html($line, -nbsp=>1);
1730         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1731                 $cgi->a({-href => href(action=>"object", hash=>$1),
1732                                         -class => "text"}, $1);
1733         }eg;
1734
1735         return $line;
1736 }
1737
1738 # format marker of refs pointing to given object
1739
1740 # the destination action is chosen based on object type and current context:
1741 # - for annotated tags, we choose the tag view unless it's the current view
1742 #   already, in which case we go to shortlog view
1743 # - for other refs, we keep the current view if we're in history, shortlog or
1744 #   log view, and select shortlog otherwise
1745 sub format_ref_marker {
1746         my ($refs, $id) = @_;
1747         my $markers = '';
1748
1749         if (defined $refs->{$id}) {
1750                 foreach my $ref (@{$refs->{$id}}) {
1751                         # this code exploits the fact that non-lightweight tags are the
1752                         # only indirect objects, and that they are the only objects for which
1753                         # we want to use tag instead of shortlog as action
1754                         my ($type, $name) = qw();
1755                         my $indirect = ($ref =~ s/\^\{\}$//);
1756                         # e.g. tags/v2.6.11 or heads/next
1757                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1758                                 $type = $1;
1759                                 $name = $2;
1760                         } else {
1761                                 $type = "ref";
1762                                 $name = $ref;
1763                         }
1764
1765                         my $class = $type;
1766                         $class .= " indirect" if $indirect;
1767
1768                         my $dest_action = "shortlog";
1769
1770                         if ($indirect) {
1771                                 $dest_action = "tag" unless $action eq "tag";
1772                         } elsif ($action =~ /^(history|(short)?log)$/) {
1773                                 $dest_action = $action;
1774                         }
1775
1776                         my $dest = "";
1777                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1778                         $dest .= $ref;
1779
1780                         my $link = $cgi->a({
1781                                 -href => href(
1782                                         action=>$dest_action,
1783                                         hash=>$dest
1784                                 )}, $name);
1785
1786                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1787                                 $link . "</span>";
1788                 }
1789         }
1790
1791         if ($markers) {
1792                 return ' <span class="refs">'. $markers . '</span>';
1793         } else {
1794                 return "";
1795         }
1796 }
1797
1798 # format, perhaps shortened and with markers, title line
1799 sub format_subject_html {
1800         my ($long, $short, $href, $extra) = @_;
1801         $extra = '' unless defined($extra);
1802
1803         if (length($short) < length($long)) {
1804                 $long =~ s/[[:cntrl:]]/?/g;
1805                 return $cgi->a({-href => $href, -class => "list subject",
1806                                 -title => to_utf8($long)},
1807                        esc_html($short)) . $extra;
1808         } else {
1809                 return $cgi->a({-href => $href, -class => "list subject"},
1810                        esc_html($long)) . $extra;
1811         }
1812 }
1813
1814 # Rather than recomputing the url for an email multiple times, we cache it
1815 # after the first hit. This gives a visible benefit in views where the avatar
1816 # for the same email is used repeatedly (e.g. shortlog).
1817 # The cache is shared by all avatar engines (currently gravatar only), which
1818 # are free to use it as preferred. Since only one avatar engine is used for any
1819 # given page, there's no risk for cache conflicts.
1820 our %avatar_cache = ();
1821
1822 # Compute the picon url for a given email, by using the picon search service over at
1823 # http://www.cs.indiana.edu/picons/search.html
1824 sub picon_url {
1825         my $email = lc shift;
1826         if (!$avatar_cache{$email}) {
1827                 my ($user, $domain) = split('@', $email);
1828                 $avatar_cache{$email} =
1829                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1830                         "$domain/$user/" .
1831                         "users+domains+unknown/up/single";
1832         }
1833         return $avatar_cache{$email};
1834 }
1835
1836 # Compute the gravatar url for a given email, if it's not in the cache already.
1837 # Gravatar stores only the part of the URL before the size, since that's the
1838 # one computationally more expensive. This also allows reuse of the cache for
1839 # different sizes (for this particular engine).
1840 sub gravatar_url {
1841         my $email = lc shift;
1842         my $size = shift;
1843         $avatar_cache{$email} ||=
1844                 "http://www.gravatar.com/avatar/" .
1845                         Digest::MD5::md5_hex($email) . "?s=";
1846         return $avatar_cache{$email} . $size;
1847 }
1848
1849 # Insert an avatar for the given $email at the given $size if the feature
1850 # is enabled.
1851 sub git_get_avatar {
1852         my ($email, %opts) = @_;
1853         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1854         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1855         $opts{-size} ||= 'default';
1856         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1857         my $url = "";
1858         if ($git_avatar eq 'gravatar') {
1859                 $url = gravatar_url($email, $size);
1860         } elsif ($git_avatar eq 'picon') {
1861                 $url = picon_url($email);
1862         }
1863         # Other providers can be added by extending the if chain, defining $url
1864         # as needed. If no variant puts something in $url, we assume avatars
1865         # are completely disabled/unavailable.
1866         if ($url) {
1867                 return $pre_white .
1868                        "<img width=\"$size\" " .
1869                             "class=\"avatar\" " .
1870                             "src=\"".esc_url($url)."\" " .
1871                             "alt=\"\" " .
1872                        "/>" . $post_white;
1873         } else {
1874                 return "";
1875         }
1876 }
1877
1878 sub format_search_author {
1879         my ($author, $searchtype, $displaytext) = @_;
1880         my $have_search = gitweb_check_feature('search');
1881
1882         if ($have_search) {
1883                 my $performed = "";
1884                 if ($searchtype eq 'author') {
1885                         $performed = "authored";
1886                 } elsif ($searchtype eq 'committer') {
1887                         $performed = "committed";
1888                 }
1889
1890                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1891                                 searchtext=>$author,
1892                                 searchtype=>$searchtype), class=>"list",
1893                                 title=>"Search for commits $performed by $author"},
1894                                 $displaytext);
1895
1896         } else {
1897                 return $displaytext;
1898         }
1899 }
1900
1901 # format the author name of the given commit with the given tag
1902 # the author name is chopped and escaped according to the other
1903 # optional parameters (see chop_str).
1904 sub format_author_html {
1905         my $tag = shift;
1906         my $co = shift;
1907         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1908         return "<$tag class=\"author\">" .
1909                format_search_author($co->{'author_name'}, "author",
1910                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1911                        $author) .
1912                "</$tag>";
1913 }
1914
1915 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1916 sub format_git_diff_header_line {
1917         my $line = shift;
1918         my $diffinfo = shift;
1919         my ($from, $to) = @_;
1920
1921         if ($diffinfo->{'nparents'}) {
1922                 # combined diff
1923                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1924                 if ($to->{'href'}) {
1925                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1926                                          esc_path($to->{'file'}));
1927                 } else { # file was deleted (no href)
1928                         $line .= esc_path($to->{'file'});
1929                 }
1930         } else {
1931                 # "ordinary" diff
1932                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1933                 if ($from->{'href'}) {
1934                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1935                                          'a/' . esc_path($from->{'file'}));
1936                 } else { # file was added (no href)
1937                         $line .= 'a/' . esc_path($from->{'file'});
1938                 }
1939                 $line .= ' ';
1940                 if ($to->{'href'}) {
1941                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1942                                          'b/' . esc_path($to->{'file'}));
1943                 } else { # file was deleted
1944                         $line .= 'b/' . esc_path($to->{'file'});
1945                 }
1946         }
1947
1948         return "<div class=\"diff header\">$line</div>\n";
1949 }
1950
1951 # format extended diff header line, before patch itself
1952 sub format_extended_diff_header_line {
1953         my $line = shift;
1954         my $diffinfo = shift;
1955         my ($from, $to) = @_;
1956
1957         # match <path>
1958         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1959                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1960                                        esc_path($from->{'file'}));
1961         }
1962         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1963                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1964                                  esc_path($to->{'file'}));
1965         }
1966         # match single <mode>
1967         if ($line =~ m/\s(\d{6})$/) {
1968                 $line .= '<span class="info"> (' .
1969                          file_type_long($1) .
1970                          ')</span>';
1971         }
1972         # match <hash>
1973         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1974                 # can match only for combined diff
1975                 $line = 'index ';
1976                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1977                         if ($from->{'href'}[$i]) {
1978                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1979                                                   -class=>"hash"},
1980                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1981                         } else {
1982                                 $line .= '0' x 7;
1983                         }
1984                         # separator
1985                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1986                 }
1987                 $line .= '..';
1988                 if ($to->{'href'}) {
1989                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1990                                          substr($diffinfo->{'to_id'},0,7));
1991                 } else {
1992                         $line .= '0' x 7;
1993                 }
1994
1995         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1996                 # can match only for ordinary diff
1997                 my ($from_link, $to_link);
1998                 if ($from->{'href'}) {
1999                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2000                                              substr($diffinfo->{'from_id'},0,7));
2001                 } else {
2002                         $from_link = '0' x 7;
2003                 }
2004                 if ($to->{'href'}) {
2005                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2006                                            substr($diffinfo->{'to_id'},0,7));
2007                 } else {
2008                         $to_link = '0' x 7;
2009                 }
2010                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2011                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2012         }
2013
2014         return $line . "<br/>\n";
2015 }
2016
2017 # format from-file/to-file diff header
2018 sub format_diff_from_to_header {
2019         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2020         my $line;
2021         my $result = '';
2022
2023         $line = $from_line;
2024         #assert($line =~ m/^---/) if DEBUG;
2025         # no extra formatting for "^--- /dev/null"
2026         if (! $diffinfo->{'nparents'}) {
2027                 # ordinary (single parent) diff
2028                 if ($line =~ m!^--- "?a/!) {
2029                         if ($from->{'href'}) {
2030                                 $line = '--- a/' .
2031                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2032                                                 esc_path($from->{'file'}));
2033                         } else {
2034                                 $line = '--- a/' .
2035                                         esc_path($from->{'file'});
2036                         }
2037                 }
2038                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2039
2040         } else {
2041                 # combined diff (merge commit)
2042                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2043                         if ($from->{'href'}[$i]) {
2044                                 $line = '--- ' .
2045                                         $cgi->a({-href=>href(action=>"blobdiff",
2046                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2047                                                              hash_parent_base=>$parents[$i],
2048                                                              file_parent=>$from->{'file'}[$i],
2049                                                              hash=>$diffinfo->{'to_id'},
2050                                                              hash_base=>$hash,
2051                                                              file_name=>$to->{'file'}),
2052                                                  -class=>"path",
2053                                                  -title=>"diff" . ($i+1)},
2054                                                 $i+1) .
2055                                         '/' .
2056                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2057                                                 esc_path($from->{'file'}[$i]));
2058                         } else {
2059                                 $line = '--- /dev/null';
2060                         }
2061                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2062                 }
2063         }
2064
2065         $line = $to_line;
2066         #assert($line =~ m/^\+\+\+/) if DEBUG;
2067         # no extra formatting for "^+++ /dev/null"
2068         if ($line =~ m!^\+\+\+ "?b/!) {
2069                 if ($to->{'href'}) {
2070                         $line = '+++ b/' .
2071                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2072                                         esc_path($to->{'file'}));
2073                 } else {
2074                         $line = '+++ b/' .
2075                                 esc_path($to->{'file'});
2076                 }
2077         }
2078         $result .= qq!<div class="diff to_file">$line</div>\n!;
2079
2080         return $result;
2081 }
2082
2083 # create note for patch simplified by combined diff
2084 sub format_diff_cc_simplified {
2085         my ($diffinfo, @parents) = @_;
2086         my $result = '';
2087
2088         $result .= "<div class=\"diff header\">" .
2089                    "diff --cc ";
2090         if (!is_deleted($diffinfo)) {
2091                 $result .= $cgi->a({-href => href(action=>"blob",
2092                                                   hash_base=>$hash,
2093                                                   hash=>$diffinfo->{'to_id'},
2094                                                   file_name=>$diffinfo->{'to_file'}),
2095                                     -class => "path"},
2096                                    esc_path($diffinfo->{'to_file'}));
2097         } else {
2098                 $result .= esc_path($diffinfo->{'to_file'});
2099         }
2100         $result .= "</div>\n" . # class="diff header"
2101                    "<div class=\"diff nodifferences\">" .
2102                    "Simple merge" .
2103                    "</div>\n"; # class="diff nodifferences"
2104
2105         return $result;
2106 }
2107
2108 # format patch (diff) line (not to be used for diff headers)
2109 sub format_diff_line {
2110         my $line = shift;
2111         my ($from, $to) = @_;
2112         my $diff_class = "";
2113
2114         chomp $line;
2115
2116         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2117                 # combined diff
2118                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2119                 if ($line =~ m/^\@{3}/) {
2120                         $diff_class = " chunk_header";
2121                 } elsif ($line =~ m/^\\/) {
2122                         $diff_class = " incomplete";
2123                 } elsif ($prefix =~ tr/+/+/) {
2124                         $diff_class = " add";
2125                 } elsif ($prefix =~ tr/-/-/) {
2126                         $diff_class = " rem";
2127                 }
2128         } else {
2129                 # assume ordinary diff
2130                 my $char = substr($line, 0, 1);
2131                 if ($char eq '+') {
2132                         $diff_class = " add";
2133                 } elsif ($char eq '-') {
2134                         $diff_class = " rem";
2135                 } elsif ($char eq '@') {
2136                         $diff_class = " chunk_header";
2137                 } elsif ($char eq "\\") {
2138                         $diff_class = " incomplete";
2139                 }
2140         }
2141         $line = untabify($line);
2142         if ($from && $to && $line =~ m/^\@{2} /) {
2143                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2144                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2145
2146                 $from_lines = 0 unless defined $from_lines;
2147                 $to_lines   = 0 unless defined $to_lines;
2148
2149                 if ($from->{'href'}) {
2150                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2151                                              -class=>"list"}, $from_text);
2152                 }
2153                 if ($to->{'href'}) {
2154                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2155                                              -class=>"list"}, $to_text);
2156                 }
2157                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2158                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2159                 return "<div class=\"diff$diff_class\">$line</div>\n";
2160         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2161                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2162                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2163
2164                 @from_text = split(' ', $ranges);
2165                 for (my $i = 0; $i < @from_text; ++$i) {
2166                         ($from_start[$i], $from_nlines[$i]) =
2167                                 (split(',', substr($from_text[$i], 1)), 0);
2168                 }
2169
2170                 $to_text   = pop @from_text;
2171                 $to_start  = pop @from_start;
2172                 $to_nlines = pop @from_nlines;
2173
2174                 $line = "<span class=\"chunk_info\">$prefix ";
2175                 for (my $i = 0; $i < @from_text; ++$i) {
2176                         if ($from->{'href'}[$i]) {
2177                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2178                                                   -class=>"list"}, $from_text[$i]);
2179                         } else {
2180                                 $line .= $from_text[$i];
2181                         }
2182                         $line .= " ";
2183                 }
2184                 if ($to->{'href'}) {
2185                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2186                                           -class=>"list"}, $to_text);
2187                 } else {
2188                         $line .= $to_text;
2189                 }
2190                 $line .= " $prefix</span>" .
2191                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2192                 return "<div class=\"diff$diff_class\">$line</div>\n";
2193         }
2194         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2195 }
2196
2197 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2198 # linked.  Pass the hash of the tree/commit to snapshot.
2199 sub format_snapshot_links {
2200         my ($hash) = @_;
2201         my $num_fmts = @snapshot_fmts;
2202         if ($num_fmts > 1) {
2203                 # A parenthesized list of links bearing format names.
2204                 # e.g. "snapshot (_tar.gz_ _zip_)"
2205                 return "snapshot (" . join(' ', map
2206                         $cgi->a({
2207                                 -href => href(
2208                                         action=>"snapshot",
2209                                         hash=>$hash,
2210                                         snapshot_format=>$_
2211                                 )
2212                         }, $known_snapshot_formats{$_}{'display'})
2213                 , @snapshot_fmts) . ")";
2214         } elsif ($num_fmts == 1) {
2215                 # A single "snapshot" link whose tooltip bears the format name.
2216                 # i.e. "_snapshot_"
2217                 my ($fmt) = @snapshot_fmts;
2218                 return
2219                         $cgi->a({
2220                                 -href => href(
2221                                         action=>"snapshot",
2222                                         hash=>$hash,
2223                                         snapshot_format=>$fmt
2224                                 ),
2225                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2226                         }, "snapshot");
2227         } else { # $num_fmts == 0
2228                 return undef;
2229         }
2230 }
2231
2232 ## ......................................................................
2233 ## functions returning values to be passed, perhaps after some
2234 ## transformation, to other functions; e.g. returning arguments to href()
2235
2236 # returns hash to be passed to href to generate gitweb URL
2237 # in -title key it returns description of link
2238 sub get_feed_info {
2239         my $format = shift || 'Atom';
2240         my %res = (action => lc($format));
2241
2242         # feed links are possible only for project views
2243         return unless (defined $project);
2244         # some views should link to OPML, or to generic project feed,
2245         # or don't have specific feed yet (so they should use generic)
2246         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2247
2248         my $branch;
2249         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2250         # from tag links; this also makes possible to detect branch links
2251         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2252             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2253                 $branch = $1;
2254         }
2255         # find log type for feed description (title)
2256         my $type = 'log';
2257         if (defined $file_name) {
2258                 $type  = "history of $file_name";
2259                 $type .= "/" if ($action eq 'tree');
2260                 $type .= " on '$branch'" if (defined $branch);
2261         } else {
2262                 $type = "log of $branch" if (defined $branch);
2263         }
2264
2265         $res{-title} = $type;
2266         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2267         $res{'file_name'} = $file_name;
2268
2269         return %res;
2270 }
2271
2272 ## ----------------------------------------------------------------------
2273 ## git utility subroutines, invoking git commands
2274
2275 # returns path to the core git executable and the --git-dir parameter as list
2276 sub git_cmd {
2277         $number_of_git_cmds++;
2278         return $GIT, '--git-dir='.$git_dir;
2279 }
2280
2281 # quote the given arguments for passing them to the shell
2282 # quote_command("command", "arg 1", "arg with ' and ! characters")
2283 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2284 # Try to avoid using this function wherever possible.
2285 sub quote_command {
2286         return join(' ',
2287                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2288 }
2289
2290 # get HEAD ref of given project as hash
2291 sub git_get_head_hash {
2292         return git_get_full_hash(shift, 'HEAD');
2293 }
2294
2295 sub git_get_full_hash {
2296         return git_get_hash(@_);
2297 }
2298
2299 sub git_get_short_hash {
2300         return git_get_hash(@_, '--short=7');
2301 }
2302
2303 sub git_get_hash {
2304         my ($project, $hash, @options) = @_;
2305         my $o_git_dir = $git_dir;
2306         my $retval = undef;
2307         $git_dir = "$projectroot/$project";
2308         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2309             '--verify', '-q', @options, $hash) {
2310                 $retval = <$fd>;
2311                 chomp $retval if defined $retval;
2312                 close $fd;
2313         }
2314         if (defined $o_git_dir) {
2315                 $git_dir = $o_git_dir;
2316         }
2317         return $retval;
2318 }
2319
2320 # get type of given object
2321 sub git_get_type {
2322         my $hash = shift;
2323
2324         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2325         my $type = <$fd>;
2326         close $fd or return;
2327         chomp $type;
2328         return $type;
2329 }
2330
2331 # repository configuration
2332 our $config_file = '';
2333 our %config;
2334
2335 # store multiple values for single key as anonymous array reference
2336 # single values stored directly in the hash, not as [ <value> ]
2337 sub hash_set_multi {
2338         my ($hash, $key, $value) = @_;
2339
2340         if (!exists $hash->{$key}) {
2341                 $hash->{$key} = $value;
2342         } elsif (!ref $hash->{$key}) {
2343                 $hash->{$key} = [ $hash->{$key}, $value ];
2344         } else {
2345                 push @{$hash->{$key}}, $value;
2346         }
2347 }
2348
2349 # return hash of git project configuration
2350 # optionally limited to some section, e.g. 'gitweb'
2351 sub git_parse_project_config {
2352         my $section_regexp = shift;
2353         my %config;
2354
2355         local $/ = "\0";
2356
2357         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2358                 or return;
2359
2360         while (my $keyval = <$fh>) {
2361                 chomp $keyval;
2362                 my ($key, $value) = split(/\n/, $keyval, 2);
2363
2364                 hash_set_multi(\%config, $key, $value)
2365                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2366         }
2367         close $fh;
2368
2369         return %config;
2370 }
2371
2372 # convert config value to boolean: 'true' or 'false'
2373 # no value, number > 0, 'true' and 'yes' values are true
2374 # rest of values are treated as false (never as error)
2375 sub config_to_bool {
2376         my $val = shift;
2377
2378         return 1 if !defined $val;             # section.key
2379
2380         # strip leading and trailing whitespace
2381         $val =~ s/^\s+//;
2382         $val =~ s/\s+$//;
2383
2384         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2385                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2386 }
2387
2388 # convert config value to simple decimal number
2389 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2390 # to be multiplied by 1024, 1048576, or 1073741824
2391 sub config_to_int {
2392         my $val = shift;
2393
2394         # strip leading and trailing whitespace
2395         $val =~ s/^\s+//;
2396         $val =~ s/\s+$//;
2397
2398         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2399                 $unit = lc($unit);
2400                 # unknown unit is treated as 1
2401                 return $num * ($unit eq 'g' ? 1073741824 :
2402                                $unit eq 'm' ?    1048576 :
2403                                $unit eq 'k' ?       1024 : 1);
2404         }
2405         return $val;
2406 }
2407
2408 # convert config value to array reference, if needed
2409 sub config_to_multi {
2410         my $val = shift;
2411
2412         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2413 }
2414
2415 sub git_get_project_config {
2416         my ($key, $type) = @_;
2417
2418         return unless defined $git_dir;
2419
2420         # key sanity check
2421         return unless ($key);
2422         $key =~ s/^gitweb\.//;
2423         return if ($key =~ m/\W/);
2424
2425         # type sanity check
2426         if (defined $type) {
2427                 $type =~ s/^--//;
2428                 $type = undef
2429                         unless ($type eq 'bool' || $type eq 'int');
2430         }
2431
2432         # get config
2433         if (!defined $config_file ||
2434             $config_file ne "$git_dir/config") {
2435                 %config = git_parse_project_config('gitweb');
2436                 $config_file = "$git_dir/config";
2437         }
2438
2439         # check if config variable (key) exists
2440         return unless exists $config{"gitweb.$key"};
2441
2442         # ensure given type
2443         if (!defined $type) {
2444                 return $config{"gitweb.$key"};
2445         } elsif ($type eq 'bool') {
2446                 # backward compatibility: 'git config --bool' returns true/false
2447                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2448         } elsif ($type eq 'int') {
2449                 return config_to_int($config{"gitweb.$key"});
2450         }
2451         return $config{"gitweb.$key"};
2452 }
2453
2454 # get hash of given path at given ref
2455 sub git_get_hash_by_path {
2456         my $base = shift;
2457         my $path = shift || return undef;
2458         my $type = shift;
2459
2460         $path =~ s,/+$,,;
2461
2462         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2463                 or die_error(500, "Open git-ls-tree failed");
2464         my $line = <$fd>;
2465         close $fd or return undef;
2466
2467         if (!defined $line) {
2468                 # there is no tree or hash given by $path at $base
2469                 return undef;
2470         }
2471
2472         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2473         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2474         if (defined $type && $type ne $2) {
2475                 # type doesn't match
2476                 return undef;
2477         }
2478         return $3;
2479 }
2480
2481 # get path of entry with given hash at given tree-ish (ref)
2482 # used to get 'from' filename for combined diff (merge commit) for renames
2483 sub git_get_path_by_hash {
2484         my $base = shift || return;
2485         my $hash = shift || return;
2486
2487         local $/ = "\0";
2488
2489         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2490                 or return undef;
2491         while (my $line = <$fd>) {
2492                 chomp $line;
2493
2494                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2495                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2496                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2497                         close $fd;
2498                         return $1;
2499                 }
2500         }
2501         close $fd;
2502         return undef;
2503 }
2504
2505 ## ......................................................................
2506 ## git utility functions, directly accessing git repository
2507
2508 sub git_get_project_description {
2509         my $path = shift;
2510
2511         $git_dir = "$projectroot/$path";
2512         open my $fd, '<', "$git_dir/description"
2513                 or return git_get_project_config('description');
2514         my $descr = <$fd>;
2515         close $fd;
2516         if (defined $descr) {
2517                 chomp $descr;
2518         }
2519         return $descr;
2520 }
2521
2522 sub git_get_project_ctags {
2523         my $path = shift;
2524         my $ctags = {};
2525
2526         $git_dir = "$projectroot/$path";
2527         opendir my $dh, "$git_dir/ctags"
2528                 or return $ctags;
2529         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2530                 open my $ct, '<', $_ or next;
2531                 my $val = <$ct>;
2532                 chomp $val;
2533                 close $ct;
2534                 my $ctag = $_; $ctag =~ s#.*/##;
2535                 $ctags->{$ctag} = $val;
2536         }
2537         closedir $dh;
2538         $ctags;
2539 }
2540
2541 sub git_populate_project_tagcloud {
2542         my $ctags = shift;
2543
2544         # First, merge different-cased tags; tags vote on casing
2545         my %ctags_lc;
2546         foreach (keys %$ctags) {
2547                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2548                 if (not $ctags_lc{lc $_}->{topcount}
2549                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2550                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2551                         $ctags_lc{lc $_}->{topname} = $_;
2552                 }
2553         }
2554
2555         my $cloud;
2556         if (eval { require HTML::TagCloud; 1; }) {
2557                 $cloud = HTML::TagCloud->new;
2558                 foreach (sort keys %ctags_lc) {
2559                         # Pad the title with spaces so that the cloud looks
2560                         # less crammed.
2561                         my $title = $ctags_lc{$_}->{topname};
2562                         $title =~ s/ /&nbsp;/g;
2563                         $title =~ s/^/&nbsp;/g;
2564                         $title =~ s/$/&nbsp;/g;
2565                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2566                 }
2567         } else {
2568                 $cloud = \%ctags_lc;
2569         }
2570         $cloud;
2571 }
2572
2573 sub git_show_project_tagcloud {
2574         my ($cloud, $count) = @_;
2575         print STDERR ref($cloud)."..\n";
2576         if (ref $cloud eq 'HTML::TagCloud') {
2577                 return $cloud->html_and_css($count);
2578         } else {
2579                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2580                 return '<p align="center">' . join (', ', map {
2581                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2582                 } splice(@tags, 0, $count)) . '</p>';
2583         }
2584 }
2585
2586 sub git_get_project_url_list {
2587         my $path = shift;
2588
2589         $git_dir = "$projectroot/$path";
2590         open my $fd, '<', "$git_dir/cloneurl"
2591                 or return wantarray ?
2592                 @{ config_to_multi(git_get_project_config('url')) } :
2593                    config_to_multi(git_get_project_config('url'));
2594         my @git_project_url_list = map { chomp; $_ } <$fd>;
2595         close $fd;
2596
2597         return wantarray ? @git_project_url_list : \@git_project_url_list;
2598 }
2599
2600 sub git_get_projects_list {
2601         my ($filter) = @_;
2602         my @list;
2603
2604         $filter ||= '';
2605         $filter =~ s/\.git$//;
2606
2607         my $check_forks = gitweb_check_feature('forks');
2608
2609         if (-d $projects_list) {
2610                 # search in directory
2611                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2612                 # remove the trailing "/"
2613                 $dir =~ s!/+$!!;
2614                 my $pfxlen = length("$dir");
2615                 my $pfxdepth = ($dir =~ tr!/!!);
2616
2617                 File::Find::find({
2618                         follow_fast => 1, # follow symbolic links
2619                         follow_skip => 2, # ignore duplicates
2620                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2621                         wanted => sub {
2622                                 # global variables
2623                                 our $project_maxdepth;
2624                                 our $projectroot;
2625                                 # skip project-list toplevel, if we get it.
2626                                 return if (m!^[/.]$!);
2627                                 # only directories can be git repositories
2628                                 return unless (-d $_);
2629                                 # don't traverse too deep (Find is super slow on os x)
2630                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2631                                         $File::Find::prune = 1;
2632                                         return;
2633                                 }
2634
2635                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2636                                 # we check related file in $projectroot
2637                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2638                                 if (check_export_ok("$projectroot/$path")) {
2639                                         push @list, { path => $path };
2640                                         $File::Find::prune = 1;
2641                                 }
2642                         },
2643                 }, "$dir");
2644
2645         } elsif (-f $projects_list) {
2646                 # read from file(url-encoded):
2647                 # 'git%2Fgit.git Linus+Torvalds'
2648                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2649                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2650                 my %paths;
2651                 open my $fd, '<', $projects_list or return;
2652         PROJECT:
2653                 while (my $line = <$fd>) {
2654                         chomp $line;
2655                         my ($path, $owner) = split ' ', $line;
2656                         $path = unescape($path);
2657                         $owner = unescape($owner);
2658                         if (!defined $path) {
2659                                 next;
2660                         }
2661                         if ($filter ne '') {
2662                                 # looking for forks;
2663                                 my $pfx = substr($path, 0, length($filter));
2664                                 if ($pfx ne $filter) {
2665                                         next PROJECT;
2666                                 }
2667                                 my $sfx = substr($path, length($filter));
2668                                 if ($sfx !~ /^\/.*\.git$/) {
2669                                         next PROJECT;
2670                                 }
2671                         } elsif ($check_forks) {
2672                         PATH:
2673                                 foreach my $filter (keys %paths) {
2674                                         # looking for forks;
2675                                         my $pfx = substr($path, 0, length($filter));
2676                                         if ($pfx ne $filter) {
2677                                                 next PATH;
2678                                         }
2679                                         my $sfx = substr($path, length($filter));
2680                                         if ($sfx !~ /^\/.*\.git$/) {
2681                                                 next PATH;
2682                                         }
2683                                         # is a fork, don't include it in
2684                                         # the list
2685                                         next PROJECT;
2686                                 }
2687                         }
2688                         if (check_export_ok("$projectroot/$path")) {
2689                                 my $pr = {
2690                                         path => $path,
2691                                         owner => to_utf8($owner),
2692                                 };
2693                                 push @list, $pr;
2694                                 (my $forks_path = $path) =~ s/\.git$//;
2695                                 $paths{$forks_path}++;
2696                         }
2697                 }
2698                 close $fd;
2699         }
2700         return @list;
2701 }
2702
2703 our $gitweb_project_owner = undef;
2704 sub git_get_project_list_from_file {
2705
2706         return if (defined $gitweb_project_owner);
2707
2708         $gitweb_project_owner = {};
2709         # read from file (url-encoded):
2710         # 'git%2Fgit.git Linus+Torvalds'
2711         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2712         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2713         if (-f $projects_list) {
2714                 open(my $fd, '<', $projects_list);
2715                 while (my $line = <$fd>) {
2716                         chomp $line;
2717                         my ($pr, $ow) = split ' ', $line;
2718                         $pr = unescape($pr);
2719                         $ow = unescape($ow);
2720                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2721                 }
2722                 close $fd;
2723         }
2724 }
2725
2726 sub git_get_project_owner {
2727         my $project = shift;
2728         my $owner;
2729
2730         return undef unless $project;
2731         $git_dir = "$projectroot/$project";
2732
2733         if (!defined $gitweb_project_owner) {
2734                 git_get_project_list_from_file();
2735         }
2736
2737         if (exists $gitweb_project_owner->{$project}) {
2738                 $owner = $gitweb_project_owner->{$project};
2739         }
2740         if (!defined $owner){
2741                 $owner = git_get_project_config('owner');
2742         }
2743         if (!defined $owner) {
2744                 $owner = get_file_owner("$git_dir");
2745         }
2746
2747         return $owner;
2748 }
2749
2750 sub git_get_last_activity {
2751         my ($path) = @_;
2752         my $fd;
2753
2754         $git_dir = "$projectroot/$path";
2755         open($fd, "-|", git_cmd(), 'for-each-ref',
2756              '--format=%(committer)',
2757              '--sort=-committerdate',
2758              '--count=1',
2759              'refs/heads') or return;
2760         my $most_recent = <$fd>;
2761         close $fd or return;
2762         if (defined $most_recent &&
2763             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2764                 my $timestamp = $1;
2765                 my $age = time - $timestamp;
2766                 return ($age, age_string($age));
2767         }
2768         return (undef, undef);
2769 }
2770
2771 sub git_get_references {
2772         my $type = shift || "";
2773         my %refs;
2774         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2775         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2776         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2777                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2778                 or return;
2779
2780         while (my $line = <$fd>) {
2781                 chomp $line;
2782                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2783                         if (defined $refs{$1}) {
2784                                 push @{$refs{$1}}, $2;
2785                         } else {
2786                                 $refs{$1} = [ $2 ];
2787                         }
2788                 }
2789         }
2790         close $fd or return;
2791         return \%refs;
2792 }
2793
2794 sub git_get_rev_name_tags {
2795         my $hash = shift || return undef;
2796
2797         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2798                 or return;
2799         my $name_rev = <$fd>;
2800         close $fd;
2801
2802         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2803                 return $1;
2804         } else {
2805                 # catches also '$hash undefined' output
2806                 return undef;
2807         }
2808 }
2809
2810 ## ----------------------------------------------------------------------
2811 ## parse to hash functions
2812
2813 sub parse_date {
2814         my $epoch = shift;
2815         my $tz = shift || "-0000";
2816
2817         my %date;
2818         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2819         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2820         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2821         $date{'hour'} = $hour;
2822         $date{'minute'} = $min;
2823         $date{'mday'} = $mday;
2824         $date{'day'} = $days[$wday];
2825         $date{'month'} = $months[$mon];
2826         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2827                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2828         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2829                              $mday, $months[$mon], $hour ,$min;
2830         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2831                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2832
2833         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2834         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2835         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2836         $date{'hour_local'} = $hour;
2837         $date{'minute_local'} = $min;
2838         $date{'tz_local'} = $tz;
2839         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2840                                   1900+$year, $mon+1, $mday,
2841                                   $hour, $min, $sec, $tz);
2842         return %date;
2843 }
2844
2845 sub parse_tag {
2846         my $tag_id = shift;
2847         my %tag;
2848         my @comment;
2849
2850         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2851         $tag{'id'} = $tag_id;
2852         while (my $line = <$fd>) {
2853                 chomp $line;
2854                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2855                         $tag{'object'} = $1;
2856                 } elsif ($line =~ m/^type (.+)$/) {
2857                         $tag{'type'} = $1;
2858                 } elsif ($line =~ m/^tag (.+)$/) {
2859                         $tag{'name'} = $1;
2860                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2861                         $tag{'author'} = $1;
2862                         $tag{'author_epoch'} = $2;
2863                         $tag{'author_tz'} = $3;
2864                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2865                                 $tag{'author_name'}  = $1;
2866                                 $tag{'author_email'} = $2;
2867                         } else {
2868                                 $tag{'author_name'} = $tag{'author'};
2869                         }
2870                 } elsif ($line =~ m/--BEGIN/) {
2871                         push @comment, $line;
2872                         last;
2873                 } elsif ($line eq "") {
2874                         last;
2875                 }
2876         }
2877         push @comment, <$fd>;
2878         $tag{'comment'} = \@comment;
2879         close $fd or return;
2880         if (!defined $tag{'name'}) {
2881                 return
2882         };
2883         return %tag
2884 }
2885
2886 sub parse_commit_text {
2887         my ($commit_text, $withparents) = @_;
2888         my @commit_lines = split '\n', $commit_text;
2889         my %co;
2890
2891         pop @commit_lines; # Remove '\0'
2892
2893         if (! @commit_lines) {
2894                 return;
2895         }
2896
2897         my $header = shift @commit_lines;
2898         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2899                 return;
2900         }
2901         ($co{'id'}, my @parents) = split ' ', $header;
2902         while (my $line = shift @commit_lines) {
2903                 last if $line eq "\n";
2904                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2905                         $co{'tree'} = $1;
2906                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2907                         push @parents, $1;
2908                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2909                         $co{'author'} = to_utf8($1);
2910                         $co{'author_epoch'} = $2;
2911                         $co{'author_tz'} = $3;
2912                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2913                                 $co{'author_name'}  = $1;
2914                                 $co{'author_email'} = $2;
2915                         } else {
2916                                 $co{'author_name'} = $co{'author'};
2917                         }
2918                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2919                         $co{'committer'} = to_utf8($1);
2920                         $co{'committer_epoch'} = $2;
2921                         $co{'committer_tz'} = $3;
2922                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2923                                 $co{'committer_name'}  = $1;
2924                                 $co{'committer_email'} = $2;
2925                         } else {
2926                                 $co{'committer_name'} = $co{'committer'};
2927                         }
2928                 }
2929         }
2930         if (!defined $co{'tree'}) {
2931                 return;
2932         };
2933         $co{'parents'} = \@parents;
2934         $co{'parent'} = $parents[0];
2935
2936         foreach my $title (@commit_lines) {
2937                 $title =~ s/^    //;
2938                 if ($title ne "") {
2939                         $co{'title'} = chop_str($title, 80, 5);
2940                         # remove leading stuff of merges to make the interesting part visible
2941                         if (length($title) > 50) {
2942                                 $title =~ s/^Automatic //;
2943                                 $title =~ s/^merge (of|with) /Merge ... /i;
2944                                 if (length($title) > 50) {
2945                                         $title =~ s/(http|rsync):\/\///;
2946                                 }
2947                                 if (length($title) > 50) {
2948                                         $title =~ s/(master|www|rsync)\.//;
2949                                 }
2950                                 if (length($title) > 50) {
2951                                         $title =~ s/kernel.org:?//;
2952                                 }
2953                                 if (length($title) > 50) {
2954                                         $title =~ s/\/pub\/scm//;
2955                                 }
2956                         }
2957                         $co{'title_short'} = chop_str($title, 50, 5);
2958                         last;
2959                 }
2960         }
2961         if (! defined $co{'title'} || $co{'title'} eq "") {
2962                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2963         }
2964         # remove added spaces
2965         foreach my $line (@commit_lines) {
2966                 $line =~ s/^    //;
2967         }
2968         $co{'comment'} = \@commit_lines;
2969
2970         my $age = time - $co{'committer_epoch'};
2971         $co{'age'} = $age;
2972         $co{'age_string'} = age_string($age);
2973         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2974         if ($age > 60*60*24*7*2) {
2975                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2976                 $co{'age_string_age'} = $co{'age_string'};
2977         } else {
2978                 $co{'age_string_date'} = $co{'age_string'};
2979                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2980         }
2981         return %co;
2982 }
2983
2984 sub parse_commit {
2985         my ($commit_id) = @_;
2986         my %co;
2987
2988         local $/ = "\0";
2989
2990         open my $fd, "-|", git_cmd(), "rev-list",
2991                 "--parents",
2992                 "--header",
2993                 "--max-count=1",
2994                 $commit_id,
2995                 "--",
2996                 or die_error(500, "Open git-rev-list failed");
2997         %co = parse_commit_text(<$fd>, 1);
2998         close $fd;
2999
3000         return %co;
3001 }
3002
3003 sub parse_commits {
3004         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3005         my @cos;
3006
3007         $maxcount ||= 1;
3008         $skip ||= 0;
3009
3010         local $/ = "\0";
3011
3012         open my $fd, "-|", git_cmd(), "rev-list",
3013                 "--header",
3014                 @args,
3015                 ("--max-count=" . $maxcount),
3016                 ("--skip=" . $skip),
3017                 @extra_options,
3018                 $commit_id,
3019                 "--",
3020                 ($filename ? ($filename) : ())
3021                 or die_error(500, "Open git-rev-list failed");
3022         while (my $line = <$fd>) {
3023                 my %co = parse_commit_text($line);
3024                 push @cos, \%co;
3025         }
3026         close $fd;
3027
3028         return wantarray ? @cos : \@cos;
3029 }
3030
3031 # parse line of git-diff-tree "raw" output
3032 sub parse_difftree_raw_line {
3033         my $line = shift;
3034         my %res;
3035
3036         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3037         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3038         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3039                 $res{'from_mode'} = $1;
3040                 $res{'to_mode'} = $2;
3041                 $res{'from_id'} = $3;
3042                 $res{'to_id'} = $4;
3043                 $res{'status'} = $5;
3044                 $res{'similarity'} = $6;
3045                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3046                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3047                 } else {
3048                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3049                 }
3050         }
3051         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3052         # combined diff (for merge commit)
3053         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3054                 $res{'nparents'}  = length($1);
3055                 $res{'from_mode'} = [ split(' ', $2) ];
3056                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3057                 $res{'from_id'} = [ split(' ', $3) ];
3058                 $res{'to_id'} = pop @{$res{'from_id'}};
3059                 $res{'status'} = [ split('', $4) ];
3060                 $res{'to_file'} = unquote($5);
3061         }
3062         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3063         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3064                 $res{'commit'} = $1;
3065         }
3066
3067         return wantarray ? %res : \%res;
3068 }
3069
3070 # wrapper: return parsed line of git-diff-tree "raw" output
3071 # (the argument might be raw line, or parsed info)
3072 sub parsed_difftree_line {
3073         my $line_or_ref = shift;
3074
3075         if (ref($line_or_ref) eq "HASH") {
3076                 # pre-parsed (or generated by hand)
3077                 return $line_or_ref;
3078         } else {
3079                 return parse_difftree_raw_line($line_or_ref);
3080         }
3081 }
3082
3083 # parse line of git-ls-tree output
3084 sub parse_ls_tree_line {
3085         my $line = shift;
3086         my %opts = @_;
3087         my %res;
3088
3089         if ($opts{'-l'}) {
3090                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3091                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3092
3093                 $res{'mode'} = $1;
3094                 $res{'type'} = $2;
3095                 $res{'hash'} = $3;
3096                 $res{'size'} = $4;
3097                 if ($opts{'-z'}) {
3098                         $res{'name'} = $5;
3099                 } else {
3100                         $res{'name'} = unquote($5);
3101                 }
3102         } else {
3103                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3104                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3105
3106                 $res{'mode'} = $1;
3107                 $res{'type'} = $2;
3108                 $res{'hash'} = $3;
3109                 if ($opts{'-z'}) {
3110                         $res{'name'} = $4;
3111                 } else {
3112                         $res{'name'} = unquote($4);
3113                 }
3114         }
3115
3116         return wantarray ? %res : \%res;
3117 }
3118
3119 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3120 sub parse_from_to_diffinfo {
3121         my ($diffinfo, $from, $to, @parents) = @_;
3122
3123         if ($diffinfo->{'nparents'}) {
3124                 # combined diff
3125                 $from->{'file'} = [];
3126                 $from->{'href'} = [];
3127                 fill_from_file_info($diffinfo, @parents)
3128                         unless exists $diffinfo->{'from_file'};
3129                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3130                         $from->{'file'}[$i] =
3131                                 defined $diffinfo->{'from_file'}[$i] ?
3132                                         $diffinfo->{'from_file'}[$i] :
3133                                         $diffinfo->{'to_file'};
3134                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3135                                 $from->{'href'}[$i] = href(action=>"blob",
3136                                                            hash_base=>$parents[$i],
3137                                                            hash=>$diffinfo->{'from_id'}[$i],
3138                                                            file_name=>$from->{'file'}[$i]);
3139                         } else {
3140                                 $from->{'href'}[$i] = undef;
3141                         }
3142                 }
3143         } else {
3144                 # ordinary (not combined) diff
3145                 $from->{'file'} = $diffinfo->{'from_file'};
3146                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3147                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3148                                                hash=>$diffinfo->{'from_id'},
3149                                                file_name=>$from->{'file'});
3150                 } else {
3151                         delete $from->{'href'};
3152                 }
3153         }
3154
3155         $to->{'file'} = $diffinfo->{'to_file'};
3156         if (!is_deleted($diffinfo)) { # file exists in result
3157                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3158                                      hash=>$diffinfo->{'to_id'},
3159                                      file_name=>$to->{'file'});
3160         } else {
3161                 delete $to->{'href'};
3162         }
3163 }
3164
3165 ## ......................................................................
3166 ## parse to array of hashes functions
3167
3168 sub git_get_heads_list {
3169         my $limit = shift;
3170         my @headslist;
3171
3172         open my $fd, '-|', git_cmd(), 'for-each-ref',
3173                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3174                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3175                 'refs/heads'
3176                 or return;
3177         while (my $line = <$fd>) {
3178                 my %ref_item;
3179
3180                 chomp $line;
3181                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3182                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3183                 my ($committer, $epoch, $tz) =
3184                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3185                 $ref_item{'fullname'}  = $name;
3186                 $name =~ s!^refs/heads/!!;
3187
3188                 $ref_item{'name'}  = $name;
3189                 $ref_item{'id'}    = $hash;
3190                 $ref_item{'title'} = $title || '(no commit message)';
3191                 $ref_item{'epoch'} = $epoch;
3192                 if ($epoch) {
3193                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3194                 } else {
3195                         $ref_item{'age'} = "unknown";
3196                 }
3197
3198                 push @headslist, \%ref_item;
3199         }
3200         close $fd;
3201
3202         return wantarray ? @headslist : \@headslist;
3203 }
3204
3205 sub git_get_tags_list {
3206         my $limit = shift;
3207         my @tagslist;
3208
3209         open my $fd, '-|', git_cmd(), 'for-each-ref',
3210                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3211                 '--format=%(objectname) %(objecttype) %(refname) '.
3212                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3213                 'refs/tags'
3214                 or return;
3215         while (my $line = <$fd>) {
3216                 my %ref_item;
3217
3218                 chomp $line;
3219                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3220                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3221                 my ($creator, $epoch, $tz) =
3222                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3223                 $ref_item{'fullname'} = $name;
3224                 $name =~ s!^refs/tags/!!;
3225
3226                 $ref_item{'type'} = $type;
3227                 $ref_item{'id'} = $id;
3228                 $ref_item{'name'} = $name;
3229                 if ($type eq "tag") {
3230                         $ref_item{'subject'} = $title;
3231                         $ref_item{'reftype'} = $reftype;
3232                         $ref_item{'refid'}   = $refid;
3233                 } else {
3234                         $ref_item{'reftype'} = $type;
3235                         $ref_item{'refid'}   = $id;
3236                 }
3237
3238                 if ($type eq "tag" || $type eq "commit") {
3239                         $ref_item{'epoch'} = $epoch;
3240                         if ($epoch) {
3241                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3242                         } else {
3243                                 $ref_item{'age'} = "unknown";
3244                         }
3245                 }
3246
3247                 push @tagslist, \%ref_item;
3248         }
3249         close $fd;
3250
3251         return wantarray ? @tagslist : \@tagslist;
3252 }
3253
3254 ## ----------------------------------------------------------------------
3255 ## filesystem-related functions
3256
3257 sub get_file_owner {
3258         my $path = shift;
3259
3260         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3261         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3262         if (!defined $gcos) {
3263                 return undef;
3264         }
3265         my $owner = $gcos;
3266         $owner =~ s/[,;].*$//;
3267         return to_utf8($owner);
3268 }
3269
3270 # assume that file exists
3271 sub insert_file {
3272         my $filename = shift;
3273
3274         open my $fd, '<', $filename;
3275         print map { to_utf8($_) } <$fd>;
3276         close $fd;
3277 }
3278
3279 ## ......................................................................
3280 ## mimetype related functions
3281
3282 sub mimetype_guess_file {
3283         my $filename = shift;
3284         my $mimemap = shift;
3285         -r $mimemap or return undef;
3286
3287         my %mimemap;
3288         open(my $mh, '<', $mimemap) or return undef;
3289         while (<$mh>) {
3290                 next if m/^#/; # skip comments
3291                 my ($mimetype, $exts) = split(/\t+/);
3292                 if (defined $exts) {
3293                         my @exts = split(/\s+/, $exts);
3294                         foreach my $ext (@exts) {
3295                                 $mimemap{$ext} = $mimetype;
3296                         }
3297                 }
3298         }
3299         close($mh);
3300
3301         $filename =~ /\.([^.]*)$/;
3302         return $mimemap{$1};
3303 }
3304
3305 sub mimetype_guess {
3306         my $filename = shift;
3307         my $mime;
3308         $filename =~ /\./ or return undef;
3309
3310         if ($mimetypes_file) {
3311                 my $file = $mimetypes_file;
3312                 if ($file !~ m!^/!) { # if it is relative path
3313                         # it is relative to project
3314                         $file = "$projectroot/$project/$file";
3315                 }
3316                 $mime = mimetype_guess_file($filename, $file);
3317         }
3318         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3319         return $mime;
3320 }
3321
3322 sub blob_mimetype {
3323         my $fd = shift;
3324         my $filename = shift;
3325
3326         if ($filename) {
3327                 my $mime = mimetype_guess($filename);
3328                 $mime and return $mime;
3329         }
3330
3331         # just in case
3332         return $default_blob_plain_mimetype unless $fd;
3333
3334         if (-T $fd) {
3335                 return 'text/plain';
3336         } elsif (! $filename) {
3337                 return 'application/octet-stream';
3338         } elsif ($filename =~ m/\.png$/i) {
3339                 return 'image/png';
3340         } elsif ($filename =~ m/\.gif$/i) {
3341                 return 'image/gif';
3342         } elsif ($filename =~ m/\.jpe?g$/i) {
3343                 return 'image/jpeg';
3344         } else {
3345                 return 'application/octet-stream';
3346         }
3347 }
3348
3349 sub blob_contenttype {
3350         my ($fd, $file_name, $type) = @_;
3351
3352         $type ||= blob_mimetype($fd, $file_name);
3353         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3354                 $type .= "; charset=$default_text_plain_charset";
3355         }
3356
3357         return $type;
3358 }
3359
3360 # guess file syntax for syntax highlighting; return undef if no highlighting
3361 # the name of syntax can (in the future) depend on syntax highlighter used
3362 sub guess_file_syntax {
3363         my ($highlight, $mimetype, $file_name) = @_;
3364         return undef unless ($highlight && defined $file_name);
3365         my $basename = basename($file_name, '.in');
3366         return $highlight_basename{$basename}
3367                 if exists $highlight_basename{$basename};
3368
3369         $basename =~ /\.([^.]*)$/;
3370         my $ext = $1 or return undef;
3371         return $highlight_ext{$ext}
3372                 if exists $highlight_ext{$ext};
3373
3374         return undef;
3375 }
3376
3377 # run highlighter and return FD of its output,
3378 # or return original FD if no highlighting
3379 sub run_highlighter {
3380         my ($fd, $highlight, $syntax) = @_;
3381         return $fd unless ($highlight && defined $syntax);
3382
3383         close $fd
3384                 or die_error(404, "Reading blob failed");
3385         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3386                   "highlight --xhtml --fragment --syntax $syntax |"
3387                 or die_error(500, "Couldn't open file or run syntax highlighter");
3388         return $fd;
3389 }
3390
3391 ## ======================================================================
3392 ## functions printing HTML: header, footer, error page
3393
3394 sub get_page_title {
3395         my $title = to_utf8($site_name);
3396
3397         return $title unless (defined $project);
3398         $title .= " - " . to_utf8($project);
3399
3400         return $title unless (defined $action);
3401         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3402
3403         return $title unless (defined $file_name);
3404         $title .= " - " . esc_path($file_name);
3405         if ($action eq "tree" && $file_name !~ m|/$|) {
3406                 $title .= "/";
3407         }
3408
3409         return $title;
3410 }
3411
3412 sub print_feed_meta {
3413         if (defined $project) {
3414                 my %href_params = get_feed_info();
3415                 if (!exists $href_params{'-title'}) {
3416                         $href_params{'-title'} = 'log';
3417                 }
3418
3419                 foreach my $format qw(RSS Atom) {
3420                         my $type = lc($format);
3421                         my %link_attr = (
3422                                 '-rel' => 'alternate',
3423                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3424                                 '-type' => "application/$type+xml"
3425                         );
3426
3427                         $href_params{'action'} = $type;
3428                         $link_attr{'-href'} = href(%href_params);
3429                         print "<link ".
3430                               "rel=\"$link_attr{'-rel'}\" ".
3431                               "title=\"$link_attr{'-title'}\" ".
3432                               "href=\"$link_attr{'-href'}\" ".
3433                               "type=\"$link_attr{'-type'}\" ".
3434                               "/>\n";
3435
3436                         $href_params{'extra_options'} = '--no-merges';
3437                         $link_attr{'-href'} = href(%href_params);
3438                         $link_attr{'-title'} .= ' (no merges)';
3439                         print "<link ".
3440                               "rel=\"$link_attr{'-rel'}\" ".
3441                               "title=\"$link_attr{'-title'}\" ".
3442                               "href=\"$link_attr{'-href'}\" ".
3443                               "type=\"$link_attr{'-type'}\" ".
3444                               "/>\n";
3445                 }
3446
3447         } else {
3448                 printf('<link rel="alternate" title="%s projects list" '.
3449                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3450                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3451                 printf('<link rel="alternate" title="%s projects feeds" '.
3452                        'href="%s" type="text/x-opml" />'."\n",
3453                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3454         }
3455 }
3456
3457 sub git_header_html {
3458         my $status = shift || "200 OK";
3459         my $expires = shift;
3460         my %opts = @_;
3461
3462         my $title = get_page_title();
3463         my $content_type;
3464         # require explicit support from the UA if we are to send the page as
3465         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3466         # we have to do this because MSIE sometimes globs '*/*', pretending to
3467         # support xhtml+xml but choking when it gets what it asked for.
3468         if (defined $cgi->http('HTTP_ACCEPT') &&
3469             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3470             $cgi->Accept('application/xhtml+xml') != 0) {
3471                 $content_type = 'application/xhtml+xml';
3472         } else {
3473                 $content_type = 'text/html';
3474         }
3475         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3476                            -status=> $status, -expires => $expires)
3477                 unless ($opts{'-no_http_header'});
3478         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3479         print <<EOF;
3480 <?xml version="1.0" encoding="utf-8"?>
3481 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3482 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3483 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3484 <!-- git core binaries version $git_version -->
3485 <head>
3486 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3487 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3488 <meta name="robots" content="index, nofollow"/>
3489 <title>$title</title>
3490 EOF
3491         # the stylesheet, favicon etc urls won't work correctly with path_info
3492         # unless we set the appropriate base URL
3493         if ($ENV{'PATH_INFO'}) {
3494                 print "<base href=\"".esc_url($base_url)."\" />\n";
3495         }
3496         # print out each stylesheet that exist, providing backwards capability
3497         # for those people who defined $stylesheet in a config file
3498         if (defined $stylesheet) {
3499                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3500         } else {
3501                 foreach my $stylesheet (@stylesheets) {
3502                         next unless $stylesheet;
3503                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3504                 }
3505         }
3506         print_feed_meta()
3507                 if ($status eq '200 OK');
3508         if (defined $favicon) {
3509                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3510         }
3511
3512         print "</head>\n" .
3513               "<body>\n";
3514
3515         if (defined $site_header && -f $site_header) {
3516                 insert_file($site_header);
3517         }
3518
3519         print "<div class=\"page_header\">\n" .
3520               $cgi->a({-href => esc_url($logo_url),
3521                        -title => $logo_label},
3522                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3523         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3524         if (defined $project) {
3525                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3526                 if (defined $action) {
3527                         print " / $action";
3528                 }
3529                 print "\n";
3530         }
3531         print "</div>\n";
3532
3533         my $have_search = gitweb_check_feature('search');
3534         if (defined $project && $have_search) {
3535                 if (!defined $searchtext) {
3536                         $searchtext = "";
3537                 }
3538                 my $search_hash;
3539                 if (defined $hash_base) {
3540                         $search_hash = $hash_base;
3541                 } elsif (defined $hash) {
3542                         $search_hash = $hash;
3543                 } else {
3544                         $search_hash = "HEAD";
3545                 }
3546                 my $action = $my_uri;
3547                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3548                 if ($use_pathinfo) {
3549                         $action .= "/".esc_url($project);
3550                 }
3551                 print $cgi->startform(-method => "get", -action => $action) .
3552                       "<div class=\"search\">\n" .
3553                       (!$use_pathinfo &&
3554                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3555                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3556                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3557                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3558                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3559                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3560                       " search:\n",
3561                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3562                       "<span title=\"Extended regular expression\">" .
3563                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3564                                      -checked => $search_use_regexp) .
3565                       "</span>" .
3566                       "</div>" .
3567                       $cgi->end_form() . "\n";
3568         }
3569 }
3570
3571 sub git_footer_html {
3572         my $feed_class = 'rss_logo';
3573
3574         print "<div class=\"page_footer\">\n";
3575         if (defined $project) {
3576                 my $descr = git_get_project_description($project);
3577                 if (defined $descr) {
3578                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3579                 }
3580
3581                 my %href_params = get_feed_info();
3582                 if (!%href_params) {
3583                         $feed_class .= ' generic';
3584                 }
3585                 $href_params{'-title'} ||= 'log';
3586
3587                 foreach my $format qw(RSS Atom) {
3588                         $href_params{'action'} = lc($format);
3589                         print $cgi->a({-href => href(%href_params),
3590                                       -title => "$href_params{'-title'} $format feed",
3591                                       -class => $feed_class}, $format)."\n";
3592                 }
3593
3594         } else {
3595                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3596                               -class => $feed_class}, "OPML") . " ";
3597                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3598                               -class => $feed_class}, "TXT") . "\n";
3599         }
3600         print "</div>\n"; # class="page_footer"
3601
3602         if (defined $t0 && gitweb_check_feature('timed')) {
3603                 print "<div id=\"generating_info\">\n";
3604                 print 'This page took '.
3605                       '<span id="generating_time" class="time_span">'.
3606                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3607                       ' seconds </span>'.
3608                       ' and '.
3609                       '<span id="generating_cmd">'.
3610                       $number_of_git_cmds.
3611                       '</span> git commands '.
3612                       " to generate.\n";
3613                 print "</div>\n"; # class="page_footer"
3614         }
3615
3616         if (defined $site_footer && -f $site_footer) {
3617                 insert_file($site_footer);
3618         }
3619
3620         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3621         if (defined $action &&
3622             $action eq 'blame_incremental') {
3623                 print qq!<script type="text/javascript">\n!.
3624                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3625                       qq!           "!. href() .qq!");\n!.
3626                       qq!</script>\n!;
3627         } elsif (gitweb_check_feature('javascript-actions')) {
3628                 print qq!<script type="text/javascript">\n!.
3629                       qq!window.onload = fixLinks;\n!.
3630                       qq!</script>\n!;
3631         }
3632
3633         print "</body>\n" .
3634               "</html>";
3635 }
3636
3637 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3638 # Example: die_error(404, 'Hash not found')
3639 # By convention, use the following status codes (as defined in RFC 2616):
3640 # 400: Invalid or missing CGI parameters, or
3641 #      requested object exists but has wrong type.
3642 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3643 #      this server or project.
3644 # 404: Requested object/revision/project doesn't exist.
3645 # 500: The server isn't configured properly, or
3646 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3647 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3648 # 503: The server is currently unavailable (because it is overloaded,
3649 #      or down for maintenance).  Generally, this is a temporary state.
3650 sub die_error {
3651         my $status = shift || 500;
3652         my $error = esc_html(shift) || "Internal Server Error";
3653         my $extra = shift;
3654         my %opts = @_;
3655
3656         my %http_responses = (
3657                 400 => '400 Bad Request',
3658                 403 => '403 Forbidden',
3659                 404 => '404 Not Found',
3660                 500 => '500 Internal Server Error',
3661                 503 => '503 Service Unavailable',
3662         );
3663         git_header_html($http_responses{$status}, undef, %opts);
3664         print <<EOF;
3665 <div class="page_body">
3666 <br /><br />
3667 $status - $error
3668 <br />
3669 EOF
3670         if (defined $extra) {
3671                 print "<hr />\n" .
3672                       "$extra\n";
3673         }
3674         print "</div>\n";
3675
3676         git_footer_html();
3677         goto DONE_GITWEB
3678                 unless ($opts{'-error_handler'});
3679 }
3680
3681 ## ----------------------------------------------------------------------
3682 ## functions printing or outputting HTML: navigation
3683
3684 sub git_print_page_nav {
3685         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3686         $extra = '' if !defined $extra; # pager or formats
3687
3688         my @navs = qw(summary shortlog log commit commitdiff tree);
3689         if ($suppress) {
3690                 @navs = grep { $_ ne $suppress } @navs;
3691         }
3692
3693         my %arg = map { $_ => {action=>$_} } @navs;
3694         if (defined $head) {
3695                 for (qw(commit commitdiff)) {
3696                         $arg{$_}{'hash'} = $head;
3697                 }
3698                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3699                         for (qw(shortlog log)) {
3700                                 $arg{$_}{'hash'} = $head;
3701                         }
3702                 }
3703         }
3704
3705         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3706         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3707
3708         my @actions = gitweb_get_feature('actions');
3709         my %repl = (
3710                 '%' => '%',
3711                 'n' => $project,         # project name
3712                 'f' => $git_dir,         # project path within filesystem
3713                 'h' => $treehead || '',  # current hash ('h' parameter)
3714                 'b' => $treebase || '',  # hash base ('hb' parameter)
3715         );
3716         while (@actions) {
3717                 my ($label, $link, $pos) = splice(@actions,0,3);
3718                 # insert
3719                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3720                 # munch munch
3721                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3722                 $arg{$label}{'_href'} = $link;
3723         }
3724
3725         print "<div class=\"page_nav\">\n" .
3726                 (join " | ",
3727                  map { $_ eq $current ?
3728                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3729                  } @navs);
3730         print "<br/>\n$extra<br/>\n" .
3731               "</div>\n";
3732 }
3733
3734 sub format_paging_nav {
3735         my ($action, $page, $has_next_link) = @_;
3736         my $paging_nav;
3737
3738
3739         if ($page > 0) {
3740                 $paging_nav .=
3741                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3742                         " &sdot; " .
3743                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3744                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3745         } else {
3746                 $paging_nav .= "first &sdot; prev";
3747         }
3748
3749         if ($has_next_link) {
3750                 $paging_nav .= " &sdot; " .
3751                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3752                                  -accesskey => "n", -title => "Alt-n"}, "next");
3753         } else {
3754                 $paging_nav .= " &sdot; next";
3755         }
3756
3757         return $paging_nav;
3758 }
3759
3760 ## ......................................................................
3761 ## functions printing or outputting HTML: div
3762
3763 sub git_print_header_div {
3764         my ($action, $title, $hash, $hash_base) = @_;
3765         my %args = ();
3766
3767         $args{'action'} = $action;
3768         $args{'hash'} = $hash if $hash;
3769         $args{'hash_base'} = $hash_base if $hash_base;
3770
3771         print "<div class=\"header\">\n" .
3772               $cgi->a({-href => href(%args), -class => "title"},
3773               $title ? $title : $action) .
3774               "\n</div>\n";
3775 }
3776
3777 sub print_local_time {
3778         print format_local_time(@_);
3779 }
3780
3781 sub format_local_time {
3782         my $localtime = '';
3783         my %date = @_;
3784         if ($date{'hour_local'} < 6) {
3785                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3786                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3787         } else {
3788                 $localtime .= sprintf(" (%02d:%02d %s)",
3789                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3790         }
3791
3792         return $localtime;
3793 }
3794
3795 # Outputs the author name and date in long form
3796 sub git_print_authorship {
3797         my $co = shift;
3798         my %opts = @_;
3799         my $tag = $opts{-tag} || 'div';
3800         my $author = $co->{'author_name'};
3801
3802         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3803         print "<$tag class=\"author_date\">" .
3804               format_search_author($author, "author", esc_html($author)) .
3805               " [$ad{'rfc2822'}";
3806         print_local_time(%ad) if ($opts{-localtime});
3807         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3808                   . "</$tag>\n";
3809 }
3810
3811 # Outputs table rows containing the full author or committer information,
3812 # in the format expected for 'commit' view (& similar).
3813 # Parameters are a commit hash reference, followed by the list of people
3814 # to output information for. If the list is empty it defaults to both
3815 # author and committer.
3816 sub git_print_authorship_rows {
3817         my $co = shift;
3818         # too bad we can't use @people = @_ || ('author', 'committer')
3819         my @people = @_;
3820         @people = ('author', 'committer') unless @people;
3821         foreach my $who (@people) {
3822                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3823                 print "<tr><td>$who</td><td>" .
3824                       format_search_author($co->{"${who}_name"}, $who,
3825                                esc_html($co->{"${who}_name"})) . " " .
3826                       format_search_author($co->{"${who}_email"}, $who,
3827                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3828                       "</td><td rowspan=\"2\">" .
3829                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3830                       "</td></tr>\n" .
3831                       "<tr>" .
3832                       "<td></td><td> $wd{'rfc2822'}";
3833                 print_local_time(%wd);
3834                 print "</td>" .
3835                       "</tr>\n";
3836         }
3837 }
3838
3839 sub git_print_page_path {
3840         my $name = shift;
3841         my $type = shift;
3842         my $hb = shift;
3843
3844
3845         print "<div class=\"page_path\">";
3846         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3847                       -title => 'tree root'}, to_utf8("[$project]"));
3848         print " / ";
3849         if (defined $name) {
3850                 my @dirname = split '/', $name;
3851                 my $basename = pop @dirname;
3852                 my $fullname = '';
3853
3854                 foreach my $dir (@dirname) {
3855                         $fullname .= ($fullname ? '/' : '') . $dir;
3856                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3857                                                      hash_base=>$hb),
3858                                       -title => $fullname}, esc_path($dir));
3859                         print " / ";
3860                 }
3861                 if (defined $type && $type eq 'blob') {
3862                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3863                                                      hash_base=>$hb),
3864                                       -title => $name}, esc_path($basename));
3865                 } elsif (defined $type && $type eq 'tree') {
3866                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3867                                                      hash_base=>$hb),
3868                                       -title => $name}, esc_path($basename));
3869                         print " / ";
3870                 } else {
3871                         print esc_path($basename);
3872                 }
3873         }
3874         print "<br/></div>\n";
3875 }
3876
3877 sub git_print_log {
3878         my $log = shift;
3879         my %opts = @_;
3880
3881         if ($opts{'-remove_title'}) {
3882                 # remove title, i.e. first line of log
3883                 shift @$log;
3884         }
3885         # remove leading empty lines
3886         while (defined $log->[0] && $log->[0] eq "") {
3887                 shift @$log;
3888         }
3889
3890         # print log
3891         my $signoff = 0;
3892         my $empty = 0;
3893         foreach my $line (@$log) {
3894                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3895                         $signoff = 1;
3896                         $empty = 0;
3897                         if (! $opts{'-remove_signoff'}) {
3898                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3899                                 next;
3900                         } else {
3901                                 # remove signoff lines
3902                                 next;
3903                         }
3904                 } else {
3905                         $signoff = 0;
3906                 }
3907
3908                 # print only one empty line
3909                 # do not print empty line after signoff
3910                 if ($line eq "") {
3911                         next if ($empty || $signoff);
3912                         $empty = 1;
3913                 } else {
3914                         $empty = 0;
3915                 }
3916
3917                 print format_log_line_html($line) . "<br/>\n";
3918         }
3919
3920         if ($opts{'-final_empty_line'}) {
3921                 # end with single empty line
3922                 print "<br/>\n" unless $empty;
3923         }
3924 }
3925
3926 # return link target (what link points to)
3927 sub git_get_link_target {
3928         my $hash = shift;
3929         my $link_target;
3930
3931         # read link
3932         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3933                 or return;
3934         {
3935                 local $/ = undef;
3936                 $link_target = <$fd>;
3937         }
3938         close $fd
3939                 or return;
3940
3941         return $link_target;
3942 }
3943
3944 # given link target, and the directory (basedir) the link is in,
3945 # return target of link relative to top directory (top tree);
3946 # return undef if it is not possible (including absolute links).
3947 sub normalize_link_target {
3948         my ($link_target, $basedir) = @_;
3949
3950         # absolute symlinks (beginning with '/') cannot be normalized
3951         return if (substr($link_target, 0, 1) eq '/');
3952
3953         # normalize link target to path from top (root) tree (dir)
3954         my $path;
3955         if ($basedir) {
3956                 $path = $basedir . '/' . $link_target;
3957         } else {
3958                 # we are in top (root) tree (dir)
3959                 $path = $link_target;
3960         }
3961
3962         # remove //, /./, and /../
3963         my @path_parts;
3964         foreach my $part (split('/', $path)) {
3965                 # discard '.' and ''
3966                 next if (!$part || $part eq '.');
3967                 # handle '..'
3968                 if ($part eq '..') {
3969                         if (@path_parts) {
3970                                 pop @path_parts;
3971                         } else {
3972                                 # link leads outside repository (outside top dir)
3973                                 return;
3974                         }
3975                 } else {
3976                         push @path_parts, $part;
3977                 }
3978         }
3979         $path = join('/', @path_parts);
3980
3981         return $path;
3982 }
3983
3984 # print tree entry (row of git_tree), but without encompassing <tr> element
3985 sub git_print_tree_entry {
3986         my ($t, $basedir, $hash_base, $have_blame) = @_;
3987
3988         my %base_key = ();
3989         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3990
3991         # The format of a table row is: mode list link.  Where mode is
3992         # the mode of the entry, list is the name of the entry, an href,
3993         # and link is the action links of the entry.
3994
3995         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3996         if (exists $t->{'size'}) {
3997                 print "<td class=\"size\">$t->{'size'}</td>\n";
3998         }
3999         if ($t->{'type'} eq "blob") {
4000                 print "<td class=\"list\">" .
4001                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4002                                                file_name=>"$basedir$t->{'name'}", %base_key),
4003                                 -class => "list"}, esc_path($t->{'name'}));
4004                 if (S_ISLNK(oct $t->{'mode'})) {
4005                         my $link_target = git_get_link_target($t->{'hash'});
4006                         if ($link_target) {
4007                                 my $norm_target = normalize_link_target($link_target, $basedir);
4008                                 if (defined $norm_target) {
4009                                         print " -> " .
4010                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4011                                                                      file_name=>$norm_target),
4012                                                        -title => $norm_target}, esc_path($link_target));
4013                                 } else {
4014                                         print " -> " . esc_path($link_target);
4015                                 }
4016                         }
4017                 }
4018                 print "</td>\n";
4019                 print "<td class=\"link\">";
4020                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4021                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4022                               "blob");
4023                 if ($have_blame) {
4024                         print " | " .
4025                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4026                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4027                                       "blame");
4028                 }
4029                 if (defined $hash_base) {
4030                         print " | " .
4031                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4032                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4033                                       "history");
4034                 }
4035                 print " | " .
4036                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4037                                                file_name=>"$basedir$t->{'name'}")},
4038                                 "raw");
4039                 print "</td>\n";
4040
4041         } elsif ($t->{'type'} eq "tree") {
4042                 print "<td class=\"list\">";
4043                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4044                                              file_name=>"$basedir$t->{'name'}",
4045                                              %base_key)},
4046                               esc_path($t->{'name'}));
4047                 print "</td>\n";
4048                 print "<td class=\"link\">";
4049                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4050                                              file_name=>"$basedir$t->{'name'}",
4051                                              %base_key)},
4052                               "tree");
4053                 if (defined $hash_base) {
4054                         print " | " .
4055                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4056                                                      file_name=>"$basedir$t->{'name'}")},
4057                                       "history");
4058                 }
4059                 print "</td>\n";
4060         } else {
4061                 # unknown object: we can only present history for it
4062                 # (this includes 'commit' object, i.e. submodule support)
4063                 print "<td class=\"list\">" .
4064                       esc_path($t->{'name'}) .
4065                       "</td>\n";
4066                 print "<td class=\"link\">";
4067                 if (defined $hash_base) {
4068                         print $cgi->a({-href => href(action=>"history",
4069                                                      hash_base=>$hash_base,
4070                                                      file_name=>"$basedir$t->{'name'}")},
4071                                       "history");
4072                 }
4073                 print "</td>\n";
4074         }
4075 }
4076
4077 ## ......................................................................
4078 ## functions printing large fragments of HTML
4079
4080 # get pre-image filenames for merge (combined) diff
4081 sub fill_from_file_info {
4082         my ($diff, @parents) = @_;
4083
4084         $diff->{'from_file'} = [ ];
4085         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4086         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4087                 if ($diff->{'status'}[$i] eq 'R' ||
4088                     $diff->{'status'}[$i] eq 'C') {
4089                         $diff->{'from_file'}[$i] =
4090                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4091                 }
4092         }
4093
4094         return $diff;
4095 }
4096
4097 # is current raw difftree line of file deletion
4098 sub is_deleted {
4099         my $diffinfo = shift;
4100
4101         return $diffinfo->{'to_id'} eq ('0' x 40);
4102 }
4103
4104 # does patch correspond to [previous] difftree raw line
4105 # $diffinfo  - hashref of parsed raw diff format
4106 # $patchinfo - hashref of parsed patch diff format
4107 #              (the same keys as in $diffinfo)
4108 sub is_patch_split {
4109         my ($diffinfo, $patchinfo) = @_;
4110
4111         return defined $diffinfo && defined $patchinfo
4112                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4113 }
4114
4115
4116 sub git_difftree_body {
4117         my ($difftree, $hash, @parents) = @_;
4118         my ($parent) = $parents[0];
4119         my $have_blame = gitweb_check_feature('blame');
4120         print "<div class=\"list_head\">\n";
4121         if ($#{$difftree} > 10) {
4122                 print(($#{$difftree} + 1) . " files changed:\n");
4123         }
4124         print "</div>\n";
4125
4126         print "<table class=\"" .
4127               (@parents > 1 ? "combined " : "") .
4128               "diff_tree\">\n";
4129
4130         # header only for combined diff in 'commitdiff' view
4131         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4132         if ($has_header) {
4133                 # table header
4134                 print "<thead><tr>\n" .
4135                        "<th></th><th></th>\n"; # filename, patchN link
4136                 for (my $i = 0; $i < @parents; $i++) {
4137                         my $par = $parents[$i];
4138                         print "<th>" .
4139                               $cgi->a({-href => href(action=>"commitdiff",
4140                                                      hash=>$hash, hash_parent=>$par),
4141                                        -title => 'commitdiff to parent number ' .
4142                                                   ($i+1) . ': ' . substr($par,0,7)},
4143                                       $i+1) .
4144                               "&nbsp;</th>\n";
4145                 }
4146                 print "</tr></thead>\n<tbody>\n";
4147         }
4148
4149         my $alternate = 1;
4150         my $patchno = 0;
4151         foreach my $line (@{$difftree}) {
4152                 my $diff = parsed_difftree_line($line);
4153
4154                 if ($alternate) {
4155                         print "<tr class=\"dark\">\n";
4156                 } else {
4157                         print "<tr class=\"light\">\n";
4158                 }
4159                 $alternate ^= 1;
4160
4161                 if (exists $diff->{'nparents'}) { # combined diff
4162
4163                         fill_from_file_info($diff, @parents)
4164                                 unless exists $diff->{'from_file'};
4165
4166                         if (!is_deleted($diff)) {
4167                                 # file exists in the result (child) commit
4168                                 print "<td>" .
4169                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4170                                                              file_name=>$diff->{'to_file'},
4171                                                              hash_base=>$hash),
4172                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4173                                       "</td>\n";
4174                         } else {
4175                                 print "<td>" .
4176                                       esc_path($diff->{'to_file'}) .
4177                                       "</td>\n";
4178                         }
4179
4180                         if ($action eq 'commitdiff') {
4181                                 # link to patch
4182                                 $patchno++;
4183                                 print "<td class=\"link\">" .
4184                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4185                                       " | " .
4186                                       "</td>\n";
4187                         }
4188
4189                         my $has_history = 0;
4190                         my $not_deleted = 0;
4191                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4192                                 my $hash_parent = $parents[$i];
4193                                 my $from_hash = $diff->{'from_id'}[$i];
4194                                 my $from_path = $diff->{'from_file'}[$i];
4195                                 my $status = $diff->{'status'}[$i];
4196
4197                                 $has_history ||= ($status ne 'A');
4198                                 $not_deleted ||= ($status ne 'D');
4199
4200                                 if ($status eq 'A') {
4201                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4202                                 } elsif ($status eq 'D') {
4203                                         print "<td class=\"link\">" .
4204                                               $cgi->a({-href => href(action=>"blob",
4205                                                                      hash_base=>$hash,
4206                                                                      hash=>$from_hash,
4207                                                                      file_name=>$from_path)},
4208                                                       "blob" . ($i+1)) .
4209                                               " | </td>\n";
4210                                 } else {
4211                                         if ($diff->{'to_id'} eq $from_hash) {
4212                                                 print "<td class=\"link nochange\">";
4213                                         } else {
4214                                                 print "<td class=\"link\">";
4215                                         }
4216                                         print $cgi->a({-href => href(action=>"blobdiff",
4217                                                                      hash=>$diff->{'to_id'},
4218                                                                      hash_parent=>$from_hash,
4219                                                                      hash_base=>$hash,
4220                                                                      hash_parent_base=>$hash_parent,
4221                                                                      file_name=>$diff->{'to_file'},
4222                                                                      file_parent=>$from_path)},
4223                                                       "diff" . ($i+1)) .
4224                                               " | </td>\n";
4225                                 }
4226                         }
4227
4228                         print "<td class=\"link\">";
4229                         if ($not_deleted) {
4230                                 print $cgi->a({-href => href(action=>"blob",
4231                                                              hash=>$diff->{'to_id'},
4232                                                              file_name=>$diff->{'to_file'},
4233                                                              hash_base=>$hash)},
4234                                               "blob");
4235                                 print " | " if ($has_history);
4236                         }
4237                         if ($has_history) {
4238                                 print $cgi->a({-href => href(action=>"history",
4239                                                              file_name=>$diff->{'to_file'},
4240                                                              hash_base=>$hash)},
4241                                               "history");
4242                         }
4243                         print "</td>\n";
4244
4245                         print "</tr>\n";
4246                         next; # instead of 'else' clause, to avoid extra indent
4247                 }
4248                 # else ordinary diff
4249
4250                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4251                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4252                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4253                         $to_mode_oct = oct $diff->{'to_mode'};
4254                         if (S_ISREG($to_mode_oct)) { # only for regular file
4255                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4256                         }
4257                         $to_file_type = file_type($diff->{'to_mode'});
4258                 }
4259                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4260                         $from_mode_oct = oct $diff->{'from_mode'};
4261                         if (S_ISREG($to_mode_oct)) { # only for regular file
4262                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4263                         }
4264                         $from_file_type = file_type($diff->{'from_mode'});
4265                 }
4266
4267                 if ($diff->{'status'} eq "A") { # created
4268                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4269                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4270                         $mode_chng   .= "]</span>";
4271                         print "<td>";
4272                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4273                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4274                                       -class => "list"}, esc_path($diff->{'file'}));
4275                         print "</td>\n";
4276                         print "<td>$mode_chng</td>\n";
4277                         print "<td class=\"link\">";
4278                         if ($action eq 'commitdiff') {
4279                                 # link to patch
4280                                 $patchno++;
4281                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4282                                 print " | ";
4283                         }
4284                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4285                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4286                                       "blob");
4287                         print "</td>\n";
4288
4289                 } elsif ($diff->{'status'} eq "D") { # deleted
4290                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4291                         print "<td>";
4292                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4293                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4294                                        -class => "list"}, esc_path($diff->{'file'}));
4295                         print "</td>\n";
4296                         print "<td>$mode_chng</td>\n";
4297                         print "<td class=\"link\">";
4298                         if ($action eq 'commitdiff') {
4299                                 # link to patch
4300                                 $patchno++;
4301                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4302                                 print " | ";
4303                         }
4304                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4305                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4306                                       "blob") . " | ";
4307                         if ($have_blame) {
4308                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4309                                                              file_name=>$diff->{'file'})},
4310                                               "blame") . " | ";
4311                         }
4312                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4313                                                      file_name=>$diff->{'file'})},
4314                                       "history");
4315                         print "</td>\n";
4316
4317                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4318                         my $mode_chnge = "";
4319                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4320                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4321                                 if ($from_file_type ne $to_file_type) {
4322                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4323                                 }
4324                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4325                                         if ($from_mode_str && $to_mode_str) {
4326                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4327                                         } elsif ($to_mode_str) {
4328                                                 $mode_chnge .= " mode: $to_mode_str";
4329                                         }
4330                                 }
4331                                 $mode_chnge .= "]</span>\n";
4332                         }
4333                         print "<td>";
4334                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4335                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4336                                       -class => "list"}, esc_path($diff->{'file'}));
4337                         print "</td>\n";
4338                         print "<td>$mode_chnge</td>\n";
4339                         print "<td class=\"link\">";
4340                         if ($action eq 'commitdiff') {
4341                                 # link to patch
4342                                 $patchno++;
4343                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4344                                       " | ";
4345                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4346                                 # "commit" view and modified file (not onlu mode changed)
4347                                 print $cgi->a({-href => href(action=>"blobdiff",
4348                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4349                                                              hash_base=>$hash, hash_parent_base=>$parent,
4350                                                              file_name=>$diff->{'file'})},
4351                                               "diff") .
4352                                       " | ";
4353                         }
4354                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4355                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4356                                        "blob") . " | ";
4357                         if ($have_blame) {
4358                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4359                                                              file_name=>$diff->{'file'})},
4360                                               "blame") . " | ";
4361                         }
4362                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4363                                                      file_name=>$diff->{'file'})},
4364                                       "history");
4365                         print "</td>\n";
4366
4367                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4368                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4369                         my $nstatus = $status_name{$diff->{'status'}};
4370                         my $mode_chng = "";
4371                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4372                                 # mode also for directories, so we cannot use $to_mode_str
4373                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4374                         }
4375                         print "<td>" .
4376                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4377                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4378                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4379                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4380                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4381                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4382                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4383                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4384                               "<td class=\"link\">";
4385                         if ($action eq 'commitdiff') {
4386                                 # link to patch
4387                                 $patchno++;
4388                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4389                                       " | ";
4390                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4391                                 # "commit" view and modified file (not only pure rename or copy)
4392                                 print $cgi->a({-href => href(action=>"blobdiff",
4393                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4394                                                              hash_base=>$hash, hash_parent_base=>$parent,
4395                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4396                                               "diff") .
4397                                       " | ";
4398                         }
4399                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4400                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4401                                       "blob") . " | ";
4402                         if ($have_blame) {
4403                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4404                                                              file_name=>$diff->{'to_file'})},
4405                                               "blame") . " | ";
4406                         }
4407                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4408                                                     file_name=>$diff->{'to_file'})},
4409                                       "history");
4410                         print "</td>\n";
4411
4412                 } # we should not encounter Unmerged (U) or Unknown (X) status
4413                 print "</tr>\n";
4414         }
4415         print "</tbody>" if $has_header;
4416         print "</table>\n";
4417 }
4418
4419 sub git_patchset_body {
4420         my ($fd, $difftree, $hash, @hash_parents) = @_;
4421         my ($hash_parent) = $hash_parents[0];
4422
4423         my $is_combined = (@hash_parents > 1);
4424         my $patch_idx = 0;
4425         my $patch_number = 0;
4426         my $patch_line;
4427         my $diffinfo;
4428         my $to_name;
4429         my (%from, %to);
4430
4431         print "<div class=\"patchset\">\n";
4432
4433         # skip to first patch
4434         while ($patch_line = <$fd>) {
4435                 chomp $patch_line;
4436
4437                 last if ($patch_line =~ m/^diff /);
4438         }
4439
4440  PATCH:
4441         while ($patch_line) {
4442
4443                 # parse "git diff" header line
4444                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4445                         # $1 is from_name, which we do not use
4446                         $to_name = unquote($2);
4447                         $to_name =~ s!^b/!!;
4448                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4449                         # $1 is 'cc' or 'combined', which we do not use
4450                         $to_name = unquote($2);
4451                 } else {
4452                         $to_name = undef;
4453                 }
4454
4455                 # check if current patch belong to current raw line
4456                 # and parse raw git-diff line if needed
4457                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4458                         # this is continuation of a split patch
4459                         print "<div class=\"patch cont\">\n";
4460                 } else {
4461                         # advance raw git-diff output if needed
4462                         $patch_idx++ if defined $diffinfo;
4463
4464                         # read and prepare patch information
4465                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4466
4467                         # compact combined diff output can have some patches skipped
4468                         # find which patch (using pathname of result) we are at now;
4469                         if ($is_combined) {
4470                                 while ($to_name ne $diffinfo->{'to_file'}) {
4471                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4472                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4473                                               "</div>\n";  # class="patch"
4474
4475                                         $patch_idx++;
4476                                         $patch_number++;
4477
4478                                         last if $patch_idx > $#$difftree;
4479                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4480                                 }
4481                         }
4482
4483                         # modifies %from, %to hashes
4484                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4485
4486                         # this is first patch for raw difftree line with $patch_idx index
4487                         # we index @$difftree array from 0, but number patches from 1
4488                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4489                 }
4490
4491                 # git diff header
4492                 #assert($patch_line =~ m/^diff /) if DEBUG;
4493                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4494                 $patch_number++;
4495                 # print "git diff" header
4496                 print format_git_diff_header_line($patch_line, $diffinfo,
4497                                                   \%from, \%to);
4498
4499                 # print extended diff header
4500                 print "<div class=\"diff extended_header\">\n";
4501         EXTENDED_HEADER:
4502                 while ($patch_line = <$fd>) {
4503                         chomp $patch_line;
4504
4505                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4506
4507                         print format_extended_diff_header_line($patch_line, $diffinfo,
4508                                                                \%from, \%to);
4509                 }
4510                 print "</div>\n"; # class="diff extended_header"
4511
4512                 # from-file/to-file diff header
4513                 if (! $patch_line) {
4514                         print "</div>\n"; # class="patch"
4515                         last PATCH;
4516                 }
4517                 next PATCH if ($patch_line =~ m/^diff /);
4518                 #assert($patch_line =~ m/^---/) if DEBUG;
4519
4520                 my $last_patch_line = $patch_line;
4521                 $patch_line = <$fd>;
4522                 chomp $patch_line;
4523                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4524
4525                 print format_diff_from_to_header($last_patch_line, $patch_line,
4526                                                  $diffinfo, \%from, \%to,
4527                                                  @hash_parents);
4528
4529                 # the patch itself
4530         LINE:
4531                 while ($patch_line = <$fd>) {
4532                         chomp $patch_line;
4533
4534                         next PATCH if ($patch_line =~ m/^diff /);
4535
4536                         print format_diff_line($patch_line, \%from, \%to);
4537                 }
4538
4539         } continue {
4540                 print "</div>\n"; # class="patch"
4541         }
4542
4543         # for compact combined (--cc) format, with chunk and patch simplification
4544         # the patchset might be empty, but there might be unprocessed raw lines
4545         for (++$patch_idx if $patch_number > 0;
4546              $patch_idx < @$difftree;
4547              ++$patch_idx) {
4548                 # read and prepare patch information
4549                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4550
4551                 # generate anchor for "patch" links in difftree / whatchanged part
4552                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4553                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4554                       "</div>\n";  # class="patch"
4555
4556                 $patch_number++;
4557         }
4558
4559         if ($patch_number == 0) {
4560                 if (@hash_parents > 1) {
4561                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4562                 } else {
4563                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4564                 }
4565         }
4566
4567         print "</div>\n"; # class="patchset"
4568 }
4569
4570 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4571
4572 # fills project list info (age, description, owner, forks) for each
4573 # project in the list, removing invalid projects from returned list
4574 # NOTE: modifies $projlist, but does not remove entries from it
4575 sub fill_project_list_info {
4576         my ($projlist, $check_forks) = @_;
4577         my @projects;
4578
4579         my $show_ctags = gitweb_check_feature('ctags');
4580  PROJECT:
4581         foreach my $pr (@$projlist) {
4582                 my (@activity) = git_get_last_activity($pr->{'path'});
4583                 unless (@activity) {
4584                         next PROJECT;
4585                 }
4586                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4587                 if (!defined $pr->{'descr'}) {
4588                         my $descr = git_get_project_description($pr->{'path'}) || "";
4589                         $descr = to_utf8($descr);
4590                         $pr->{'descr_long'} = $descr;
4591                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4592                 }
4593                 if (!defined $pr->{'owner'}) {
4594                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4595                 }
4596                 if ($check_forks) {
4597                         my $pname = $pr->{'path'};
4598                         if (($pname =~ s/\.git$//) &&
4599                             ($pname !~ /\/$/) &&
4600                             (-d "$projectroot/$pname")) {
4601                                 $pr->{'forks'} = "-d $projectroot/$pname";
4602                         } else {
4603                                 $pr->{'forks'} = 0;
4604                         }
4605                 }
4606                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4607                 push @projects, $pr;
4608         }
4609
4610         return @projects;
4611 }
4612
4613 # print 'sort by' <th> element, generating 'sort by $name' replay link
4614 # if that order is not selected
4615 sub print_sort_th {
4616         print format_sort_th(@_);
4617 }
4618
4619 sub format_sort_th {
4620         my ($name, $order, $header) = @_;
4621         my $sort_th = "";
4622         $header ||= ucfirst($name);
4623
4624         if ($order eq $name) {
4625                 $sort_th .= "<th>$header</th>\n";
4626         } else {
4627                 $sort_th .= "<th>" .
4628                             $cgi->a({-href => href(-replay=>1, order=>$name),
4629                                      -class => "header"}, $header) .
4630                             "</th>\n";
4631         }
4632
4633         return $sort_th;
4634 }
4635
4636 sub git_project_list_body {
4637         # actually uses global variable $project
4638         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4639
4640         my $check_forks = gitweb_check_feature('forks');
4641         my @projects = fill_project_list_info($projlist, $check_forks);
4642
4643         $order ||= $default_projects_order;
4644         $from = 0 unless defined $from;
4645         $to = $#projects if (!defined $to || $#projects < $to);
4646
4647         my %order_info = (
4648                 project => { key => 'path', type => 'str' },
4649                 descr => { key => 'descr_long', type => 'str' },
4650                 owner => { key => 'owner', type => 'str' },
4651                 age => { key => 'age', type => 'num' }
4652         );
4653         my $oi = $order_info{$order};
4654         if ($oi->{'type'} eq 'str') {
4655                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4656         } else {
4657                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4658         }
4659
4660         my $show_ctags = gitweb_check_feature('ctags');
4661         if ($show_ctags) {
4662                 my %ctags;
4663                 foreach my $p (@projects) {
4664                         foreach my $ct (keys %{$p->{'ctags'}}) {
4665                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4666                         }
4667                 }
4668                 my $cloud = git_populate_project_tagcloud(\%ctags);
4669                 print git_show_project_tagcloud($cloud, 64);
4670         }
4671
4672         print "<table class=\"project_list\">\n";
4673         unless ($no_header) {
4674                 print "<tr>\n";
4675                 if ($check_forks) {
4676                         print "<th></th>\n";
4677                 }
4678                 print_sort_th('project', $order, 'Project');
4679                 print_sort_th('descr', $order, 'Description');
4680                 print_sort_th('owner', $order, 'Owner');
4681                 print_sort_th('age', $order, 'Last Change');
4682                 print "<th></th>\n" . # for links
4683                       "</tr>\n";
4684         }
4685         my $alternate = 1;
4686         my $tagfilter = $cgi->param('by_tag');
4687         for (my $i = $from; $i <= $to; $i++) {
4688                 my $pr = $projects[$i];
4689
4690                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4691                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4692                         and not $pr->{'descr_long'} =~ /$searchtext/;
4693                 # Weed out forks or non-matching entries of search
4694                 if ($check_forks) {
4695                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4696                         $forkbase="^$forkbase" if $forkbase;
4697                         next if not $searchtext and not $tagfilter and $show_ctags
4698                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4699                 }
4700
4701                 if ($alternate) {
4702                         print "<tr class=\"dark\">\n";
4703                 } else {
4704                         print "<tr class=\"light\">\n";
4705                 }
4706                 $alternate ^= 1;
4707                 if ($check_forks) {
4708                         print "<td>";
4709                         if ($pr->{'forks'}) {
4710                                 print "<!-- $pr->{'forks'} -->\n";
4711                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4712                         }
4713                         print "</td>\n";
4714                 }
4715                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4716                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4717                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4718                                         -class => "list", -title => $pr->{'descr_long'}},
4719                                         esc_html($pr->{'descr'})) . "</td>\n" .
4720                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4721                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4722                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4723                       "<td class=\"link\">" .
4724                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4725                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4726                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4727                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4728                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4729                       "</td>\n" .
4730                       "</tr>\n";
4731         }
4732         if (defined $extra) {
4733                 print "<tr>\n";
4734                 if ($check_forks) {
4735                         print "<td></td>\n";
4736                 }
4737                 print "<td colspan=\"5\">$extra</td>\n" .
4738                       "</tr>\n";
4739         }
4740         print "</table>\n";
4741 }
4742
4743 sub git_log_body {
4744         # uses global variable $project
4745         my ($commitlist, $from, $to, $refs, $extra) = @_;
4746
4747         $from = 0 unless defined $from;
4748         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4749
4750         for (my $i = 0; $i <= $to; $i++) {
4751                 my %co = %{$commitlist->[$i]};
4752                 next if !%co;
4753                 my $commit = $co{'id'};
4754                 my $ref = format_ref_marker($refs, $commit);
4755                 my %ad = parse_date($co{'author_epoch'});
4756                 git_print_header_div('commit',
4757                                "<span class=\"age\">$co{'age_string'}</span>" .
4758                                esc_html($co{'title'}) . $ref,
4759                                $commit);
4760                 print "<div class=\"title_text\">\n" .
4761                       "<div class=\"log_link\">\n" .
4762                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4763                       " | " .
4764                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4765                       " | " .
4766                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4767                       "<br/>\n" .
4768                       "</div>\n";
4769                       git_print_authorship(\%co, -tag => 'span');
4770                       print "<br/>\n</div>\n";
4771
4772                 print "<div class=\"log_body\">\n";
4773                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4774                 print "</div>\n";
4775         }
4776         if ($extra) {
4777                 print "<div class=\"page_nav\">\n";
4778                 print "$extra\n";
4779                 print "</div>\n";
4780         }
4781 }
4782
4783 sub git_shortlog_body {
4784         # uses global variable $project
4785         my ($commitlist, $from, $to, $refs, $extra) = @_;
4786
4787         $from = 0 unless defined $from;
4788         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4789
4790         print "<table class=\"shortlog\">\n";
4791         my $alternate = 1;
4792         for (my $i = $from; $i <= $to; $i++) {
4793                 my %co = %{$commitlist->[$i]};
4794                 my $commit = $co{'id'};
4795                 my $ref = format_ref_marker($refs, $commit);
4796                 if ($alternate) {
4797                         print "<tr class=\"dark\">\n";
4798                 } else {
4799                         print "<tr class=\"light\">\n";
4800                 }
4801                 $alternate ^= 1;
4802                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4803                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4804                       format_author_html('td', \%co, 10) . "<td>";
4805                 print format_subject_html($co{'title'}, $co{'title_short'},
4806                                           href(action=>"commit", hash=>$commit), $ref);
4807                 print "</td>\n" .
4808                       "<td class=\"link\">" .
4809                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4810                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4811                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4812                 my $snapshot_links = format_snapshot_links($commit);
4813                 if (defined $snapshot_links) {
4814                         print " | " . $snapshot_links;
4815                 }
4816                 print "</td>\n" .
4817                       "</tr>\n";
4818         }
4819         if (defined $extra) {
4820                 print "<tr>\n" .
4821                       "<td colspan=\"4\">$extra</td>\n" .
4822                       "</tr>\n";
4823         }
4824         print "</table>\n";
4825 }
4826
4827 sub git_history_body {
4828         # Warning: assumes constant type (blob or tree) during history
4829         my ($commitlist, $from, $to, $refs, $extra,
4830             $file_name, $file_hash, $ftype) = @_;
4831
4832         $from = 0 unless defined $from;
4833         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4834
4835         print "<table class=\"history\">\n";
4836         my $alternate = 1;
4837         for (my $i = $from; $i <= $to; $i++) {
4838                 my %co = %{$commitlist->[$i]};
4839                 if (!%co) {
4840                         next;
4841                 }
4842                 my $commit = $co{'id'};
4843
4844                 my $ref = format_ref_marker($refs, $commit);
4845
4846                 if ($alternate) {
4847                         print "<tr class=\"dark\">\n";
4848                 } else {
4849                         print "<tr class=\"light\">\n";
4850                 }
4851                 $alternate ^= 1;
4852                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4853         # shortlog:   format_author_html('td', \%co, 10)
4854                       format_author_html('td', \%co, 15, 3) . "<td>";
4855                 # originally git_history used chop_str($co{'title'}, 50)
4856                 print format_subject_html($co{'title'}, $co{'title_short'},
4857                                           href(action=>"commit", hash=>$commit), $ref);
4858                 print "</td>\n" .
4859                       "<td class=\"link\">" .
4860                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4861                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4862
4863                 if ($ftype eq 'blob') {
4864                         my $blob_current = $file_hash;
4865                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4866                         if (defined $blob_current && defined $blob_parent &&
4867                                         $blob_current ne $blob_parent) {
4868                                 print " | " .
4869                                         $cgi->a({-href => href(action=>"blobdiff",
4870                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4871                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4872                                                                file_name=>$file_name)},
4873                                                 "diff to current");
4874                         }
4875                 }
4876                 print "</td>\n" .
4877                       "</tr>\n";
4878         }
4879         if (defined $extra) {
4880                 print "<tr>\n" .
4881                       "<td colspan=\"4\">$extra</td>\n" .
4882                       "</tr>\n";
4883         }
4884         print "</table>\n";
4885 }
4886
4887 sub git_tags_body {
4888         # uses global variable $project
4889         my ($taglist, $from, $to, $extra) = @_;
4890         $from = 0 unless defined $from;
4891         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4892
4893         print "<table class=\"tags\">\n";
4894         my $alternate = 1;
4895         for (my $i = $from; $i <= $to; $i++) {
4896                 my $entry = $taglist->[$i];
4897                 my %tag = %$entry;
4898                 my $comment = $tag{'subject'};
4899                 my $comment_short;
4900                 if (defined $comment) {
4901                         $comment_short = chop_str($comment, 30, 5);
4902                 }
4903                 if ($alternate) {
4904                         print "<tr class=\"dark\">\n";
4905                 } else {
4906                         print "<tr class=\"light\">\n";
4907                 }
4908                 $alternate ^= 1;
4909                 if (defined $tag{'age'}) {
4910                         print "<td><i>$tag{'age'}</i></td>\n";
4911                 } else {
4912                         print "<td></td>\n";
4913                 }
4914                 print "<td>" .
4915                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4916                                -class => "list name"}, esc_html($tag{'name'})) .
4917                       "</td>\n" .
4918                       "<td>";
4919                 if (defined $comment) {
4920                         print format_subject_html($comment, $comment_short,
4921                                                   href(action=>"tag", hash=>$tag{'id'}));
4922                 }
4923                 print "</td>\n" .
4924                       "<td class=\"selflink\">";
4925                 if ($tag{'type'} eq "tag") {
4926                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4927                 } else {
4928                         print "&nbsp;";
4929                 }
4930                 print "</td>\n" .
4931                       "<td class=\"link\">" . " | " .
4932                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4933                 if ($tag{'reftype'} eq "commit") {
4934                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4935                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4936                 } elsif ($tag{'reftype'} eq "blob") {
4937                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4938                 }
4939                 print "</td>\n" .
4940                       "</tr>";
4941         }
4942         if (defined $extra) {
4943                 print "<tr>\n" .
4944                       "<td colspan=\"5\">$extra</td>\n" .
4945                       "</tr>\n";
4946         }
4947         print "</table>\n";
4948 }
4949
4950 sub git_heads_body {
4951         # uses global variable $project
4952         my ($headlist, $head, $from, $to, $extra) = @_;
4953         $from = 0 unless defined $from;
4954         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4955
4956         print "<table class=\"heads\">\n";
4957         my $alternate = 1;
4958         for (my $i = $from; $i <= $to; $i++) {
4959                 my $entry = $headlist->[$i];
4960                 my %ref = %$entry;
4961                 my $curr = $ref{'id'} eq $head;
4962                 if ($alternate) {
4963                         print "<tr class=\"dark\">\n";
4964                 } else {
4965                         print "<tr class=\"light\">\n";
4966                 }
4967                 $alternate ^= 1;
4968                 print "<td><i>$ref{'age'}</i></td>\n" .
4969                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4970                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4971                                -class => "list name"},esc_html($ref{'name'})) .
4972                       "</td>\n" .
4973                       "<td class=\"link\">" .
4974                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4975                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4976                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4977                       "</td>\n" .
4978                       "</tr>";
4979         }
4980         if (defined $extra) {
4981                 print "<tr>\n" .
4982                       "<td colspan=\"3\">$extra</td>\n" .
4983                       "</tr>\n";
4984         }
4985         print "</table>\n";
4986 }
4987
4988 sub git_search_grep_body {
4989         my ($commitlist, $from, $to, $extra) = @_;
4990         $from = 0 unless defined $from;
4991         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4992
4993         print "<table class=\"commit_search\">\n";
4994         my $alternate = 1;
4995         for (my $i = $from; $i <= $to; $i++) {
4996                 my %co = %{$commitlist->[$i]};
4997                 if (!%co) {
4998                         next;
4999                 }
5000                 my $commit = $co{'id'};
5001                 if ($alternate) {
5002                         print "<tr class=\"dark\">\n";
5003                 } else {
5004                         print "<tr class=\"light\">\n";
5005                 }
5006                 $alternate ^= 1;
5007                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5008                       format_author_html('td', \%co, 15, 5) .
5009                       "<td>" .
5010                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5011                                -class => "list subject"},
5012                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5013                 my $comment = $co{'comment'};
5014                 foreach my $line (@$comment) {
5015                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5016                                 my ($lead, $match, $trail) = ($1, $2, $3);
5017                                 $match = chop_str($match, 70, 5, 'center');
5018                                 my $contextlen = int((80 - length($match))/2);
5019                                 $contextlen = 30 if ($contextlen > 30);
5020                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5021                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5022
5023                                 $lead  = esc_html($lead);
5024                                 $match = esc_html($match);
5025                                 $trail = esc_html($trail);
5026
5027                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5028                         }
5029                 }
5030                 print "</td>\n" .
5031                       "<td class=\"link\">" .
5032                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5033                       " | " .
5034                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5035                       " | " .
5036                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5037                 print "</td>\n" .
5038                       "</tr>\n";
5039         }
5040         if (defined $extra) {
5041                 print "<tr>\n" .
5042                       "<td colspan=\"3\">$extra</td>\n" .
5043                       "</tr>\n";
5044         }
5045         print "</table>\n";
5046 }
5047
5048 ## ======================================================================
5049 ## ======================================================================
5050 ## actions
5051
5052 sub git_project_list {
5053         my $order = $input_params{'order'};
5054         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5055                 die_error(400, "Unknown order parameter");
5056         }
5057
5058         my @list = git_get_projects_list();
5059         if (!@list) {
5060                 die_error(404, "No projects found");
5061         }
5062
5063         git_header_html();
5064         if (defined $home_text && -f $home_text) {
5065                 print "<div class=\"index_include\">\n";
5066                 insert_file($home_text);
5067                 print "</div>\n";
5068         }
5069         print $cgi->startform(-method => "get") .
5070               "<p class=\"projsearch\">Search:\n" .
5071               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5072               "</p>" .
5073               $cgi->end_form() . "\n";
5074         git_project_list_body(\@list, $order);
5075         git_footer_html();
5076 }
5077
5078 sub git_forks {
5079         my $order = $input_params{'order'};
5080         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5081                 die_error(400, "Unknown order parameter");
5082         }
5083
5084         my @list = git_get_projects_list($project);
5085         if (!@list) {
5086                 die_error(404, "No forks found");
5087         }
5088
5089         git_header_html();
5090         git_print_page_nav('','');
5091         git_print_header_div('summary', "$project forks");
5092         git_project_list_body(\@list, $order);
5093         git_footer_html();
5094 }
5095
5096 sub git_project_index {
5097         my @projects = git_get_projects_list($project);
5098
5099         print $cgi->header(
5100                 -type => 'text/plain',
5101                 -charset => 'utf-8',
5102                 -content_disposition => 'inline; filename="index.aux"');
5103
5104         foreach my $pr (@projects) {
5105                 if (!exists $pr->{'owner'}) {
5106                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5107                 }
5108
5109                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5110                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5111                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5112                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5113                 $path  =~ s/ /\+/g;
5114                 $owner =~ s/ /\+/g;
5115
5116                 print "$path $owner\n";
5117         }
5118 }
5119
5120 sub git_summary {
5121         my $descr = git_get_project_description($project) || "none";
5122         my %co = parse_commit("HEAD");
5123         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5124         my $head = $co{'id'};
5125
5126         my $owner = git_get_project_owner($project);
5127
5128         my $refs = git_get_references();
5129         # These get_*_list functions return one more to allow us to see if
5130         # there are more ...
5131         my @taglist  = git_get_tags_list(16);
5132         my @headlist = git_get_heads_list(16);
5133         my @forklist;
5134         my $check_forks = gitweb_check_feature('forks');
5135
5136         if ($check_forks) {
5137                 @forklist = git_get_projects_list($project);
5138         }
5139
5140         git_header_html();
5141         git_print_page_nav('summary','', $head);
5142
5143         print "<div class=\"title\">&nbsp;</div>\n";
5144         print "<table class=\"projects_list\">\n" .
5145               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5146               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5147         if (defined $cd{'rfc2822'}) {
5148                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5149         }
5150
5151         # use per project git URL list in $projectroot/$project/cloneurl
5152         # or make project git URL from git base URL and project name
5153         my $url_tag = "URL";
5154         my @url_list = git_get_project_url_list($project);
5155         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5156         foreach my $git_url (@url_list) {
5157                 next unless $git_url;
5158                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5159                 $url_tag = "";
5160         }
5161
5162         # Tag cloud
5163         my $show_ctags = gitweb_check_feature('ctags');
5164         if ($show_ctags) {
5165                 my $ctags = git_get_project_ctags($project);
5166                 my $cloud = git_populate_project_tagcloud($ctags);
5167                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5168                 print "</td>\n<td>" unless %$ctags;
5169                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5170                 print "</td>\n<td>" if %$ctags;
5171                 print git_show_project_tagcloud($cloud, 48);
5172                 print "</td></tr>";
5173         }
5174
5175         print "</table>\n";
5176
5177         # If XSS prevention is on, we don't include README.html.
5178         # TODO: Allow a readme in some safe format.
5179         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5180                 print "<div class=\"title\">readme</div>\n" .
5181                       "<div class=\"readme\">\n";
5182                 insert_file("$projectroot/$project/README.html");
5183                 print "\n</div>\n"; # class="readme"
5184         }
5185
5186         # we need to request one more than 16 (0..15) to check if
5187         # those 16 are all
5188         my @commitlist = $head ? parse_commits($head, 17) : ();
5189         if (@commitlist) {
5190                 git_print_header_div('shortlog');
5191                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5192                                   $#commitlist <=  15 ? undef :
5193                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5194         }
5195
5196         if (@taglist) {
5197                 git_print_header_div('tags');
5198                 git_tags_body(\@taglist, 0, 15,
5199                               $#taglist <=  15 ? undef :
5200                               $cgi->a({-href => href(action=>"tags")}, "..."));
5201         }
5202
5203         if (@headlist) {
5204                 git_print_header_div('heads');
5205                 git_heads_body(\@headlist, $head, 0, 15,
5206                                $#headlist <= 15 ? undef :
5207                                $cgi->a({-href => href(action=>"heads")}, "..."));
5208         }
5209
5210         if (@forklist) {
5211                 git_print_header_div('forks');
5212                 git_project_list_body(\@forklist, 'age', 0, 15,
5213                                       $#forklist <= 15 ? undef :
5214                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5215                                       'no_header');
5216         }
5217
5218         git_footer_html();
5219 }
5220
5221 sub git_tag {
5222         my %tag = parse_tag($hash);
5223
5224         if (! %tag) {
5225                 die_error(404, "Unknown tag object");
5226         }
5227
5228         my $head = git_get_head_hash($project);
5229         git_header_html();
5230         git_print_page_nav('','', $head,undef,$head);
5231         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5232         print "<div class=\"title_text\">\n" .
5233               "<table class=\"object_header\">\n" .
5234               "<tr>\n" .
5235               "<td>object</td>\n" .
5236               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5237                                $tag{'object'}) . "</td>\n" .
5238               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5239                                               $tag{'type'}) . "</td>\n" .
5240               "</tr>\n";
5241         if (defined($tag{'author'})) {
5242                 git_print_authorship_rows(\%tag, 'author');
5243         }
5244         print "</table>\n\n" .
5245               "</div>\n";
5246         print "<div class=\"page_body\">";
5247         my $comment = $tag{'comment'};
5248         foreach my $line (@$comment) {
5249                 chomp $line;
5250                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5251         }
5252         print "</div>\n";
5253         git_footer_html();
5254 }
5255
5256 sub git_blame_common {
5257         my $format = shift || 'porcelain';
5258         if ($format eq 'porcelain' && $cgi->param('js')) {
5259                 $format = 'incremental';
5260                 $action = 'blame_incremental'; # for page title etc
5261         }
5262
5263         # permissions
5264         gitweb_check_feature('blame')
5265                 or die_error(403, "Blame view not allowed");
5266
5267         # error checking
5268         die_error(400, "No file name given") unless $file_name;
5269         $hash_base ||= git_get_head_hash($project);
5270         die_error(404, "Couldn't find base commit") unless $hash_base;
5271         my %co = parse_commit($hash_base)
5272                 or die_error(404, "Commit not found");
5273         my $ftype = "blob";
5274         if (!defined $hash) {
5275                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5276                         or die_error(404, "Error looking up file");
5277         } else {
5278                 $ftype = git_get_type($hash);
5279                 if ($ftype !~ "blob") {
5280                         die_error(400, "Object is not a blob");
5281                 }
5282         }
5283
5284         my $fd;
5285         if ($format eq 'incremental') {
5286                 # get file contents (as base)
5287                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5288                         or die_error(500, "Open git-cat-file failed");
5289         } elsif ($format eq 'data') {
5290                 # run git-blame --incremental
5291                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5292                         $hash_base, "--", $file_name
5293                         or die_error(500, "Open git-blame --incremental failed");
5294         } else {
5295                 # run git-blame --porcelain
5296                 open $fd, "-|", git_cmd(), "blame", '-p',
5297                         $hash_base, '--', $file_name
5298                         or die_error(500, "Open git-blame --porcelain failed");
5299         }
5300
5301         # incremental blame data returns early
5302         if ($format eq 'data') {
5303                 print $cgi->header(
5304                         -type=>"text/plain", -charset => "utf-8",
5305                         -status=> "200 OK");
5306                 local $| = 1; # output autoflush
5307                 print while <$fd>;
5308                 close $fd
5309                         or print "ERROR $!\n";
5310
5311                 print 'END';
5312                 if (defined $t0 && gitweb_check_feature('timed')) {
5313                         print ' '.
5314                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5315                               ' '.$number_of_git_cmds;
5316                 }
5317                 print "\n";
5318
5319                 return;
5320         }
5321
5322         # page header
5323         git_header_html();
5324         my $formats_nav =
5325                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5326                         "blob") .
5327                 " | ";
5328         if ($format eq 'incremental') {
5329                 $formats_nav .=
5330                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5331                                 "blame") . " (non-incremental)";
5332         } else {
5333                 $formats_nav .=
5334                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5335                                 "blame") . " (incremental)";
5336         }
5337         $formats_nav .=
5338                 " | " .
5339                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5340                         "history") .
5341                 " | " .
5342                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5343                         "HEAD");
5344         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5345         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5346         git_print_page_path($file_name, $ftype, $hash_base);
5347
5348         # page body
5349         if ($format eq 'incremental') {
5350                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5351                       "This page requires JavaScript to run.\n Use ".
5352                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5353                               'this page').
5354                       " instead.\n".
5355                       "</b></center></div>\n</noscript>\n";
5356
5357                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5358         }
5359
5360         print qq!<div class="page_body">\n!;
5361         print qq!<div id="progress_info">... / ...</div>\n!
5362                 if ($format eq 'incremental');
5363         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5364               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5365               qq!<thead>\n!.
5366               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5367               qq!</thead>\n!.
5368               qq!<tbody>\n!;
5369
5370         my @rev_color = qw(light dark);
5371         my $num_colors = scalar(@rev_color);
5372         my $current_color = 0;
5373
5374         if ($format eq 'incremental') {
5375                 my $color_class = $rev_color[$current_color];
5376
5377                 #contents of a file
5378                 my $linenr = 0;
5379         LINE:
5380                 while (my $line = <$fd>) {
5381                         chomp $line;
5382                         $linenr++;
5383
5384                         print qq!<tr id="l$linenr" class="$color_class">!.
5385                               qq!<td class="sha1"><a href=""> </a></td>!.
5386                               qq!<td class="linenr">!.
5387                               qq!<a class="linenr" href="">$linenr</a></td>!;
5388                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5389                         print qq!</tr>\n!;
5390                 }
5391
5392         } else { # porcelain, i.e. ordinary blame
5393                 my %metainfo = (); # saves information about commits
5394
5395                 # blame data
5396         LINE:
5397                 while (my $line = <$fd>) {
5398                         chomp $line;
5399                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5400                         # no <lines in group> for subsequent lines in group of lines
5401                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5402                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5403                         if (!exists $metainfo{$full_rev}) {
5404                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5405                         }
5406                         my $meta = $metainfo{$full_rev};
5407                         my $data;
5408                         while ($data = <$fd>) {
5409                                 chomp $data;
5410                                 last if ($data =~ s/^\t//); # contents of line
5411                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5412                                         $meta->{$1} = $2 unless exists $meta->{$1};
5413                                 }
5414                                 if ($data =~ /^previous /) {
5415                                         $meta->{'nprevious'}++;
5416                                 }
5417                         }
5418                         my $short_rev = substr($full_rev, 0, 8);
5419                         my $author = $meta->{'author'};
5420                         my %date =
5421                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5422                         my $date = $date{'iso-tz'};
5423                         if ($group_size) {
5424                                 $current_color = ($current_color + 1) % $num_colors;
5425                         }
5426                         my $tr_class = $rev_color[$current_color];
5427                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5428                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5429                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5430                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5431                         if ($group_size) {
5432                                 print "<td class=\"sha1\"";
5433                                 print " title=\"". esc_html($author) . ", $date\"";
5434                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5435                                 print ">";
5436                                 print $cgi->a({-href => href(action=>"commit",
5437                                                              hash=>$full_rev,
5438                                                              file_name=>$file_name)},
5439                                               esc_html($short_rev));
5440                                 if ($group_size >= 2) {
5441                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5442                                         if (@author_initials) {
5443                                                 print "<br />" .
5444                                                       esc_html(join('', @author_initials));
5445                                                 #           or join('.', ...)
5446                                         }
5447                                 }
5448                                 print "</td>\n";
5449                         }
5450                         # 'previous' <sha1 of parent commit> <filename at commit>
5451                         if (exists $meta->{'previous'} &&
5452                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5453                                 $meta->{'parent'} = $1;
5454                                 $meta->{'file_parent'} = unquote($2);
5455                         }
5456                         my $linenr_commit =
5457                                 exists($meta->{'parent'}) ?
5458                                 $meta->{'parent'} : $full_rev;
5459                         my $linenr_filename =
5460                                 exists($meta->{'file_parent'}) ?
5461                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5462                         my $blamed = href(action => 'blame',
5463                                           file_name => $linenr_filename,
5464                                           hash_base => $linenr_commit);
5465                         print "<td class=\"linenr\">";
5466                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5467                                         -class => "linenr" },
5468                                       esc_html($lineno));
5469                         print "</td>";
5470                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5471                         print "</tr>\n";
5472                 } # end while
5473
5474         }
5475
5476         # footer
5477         print "</tbody>\n".
5478               "</table>\n"; # class="blame"
5479         print "</div>\n";   # class="blame_body"
5480         close $fd
5481                 or print "Reading blob failed\n";
5482
5483         git_footer_html();
5484 }
5485
5486 sub git_blame {
5487         git_blame_common();
5488 }
5489
5490 sub git_blame_incremental {
5491         git_blame_common('incremental');
5492 }
5493
5494 sub git_blame_data {
5495         git_blame_common('data');
5496 }
5497
5498 sub git_tags {
5499         my $head = git_get_head_hash($project);
5500         git_header_html();
5501         git_print_page_nav('','', $head,undef,$head);
5502         git_print_header_div('summary', $project);
5503
5504         my @tagslist = git_get_tags_list();
5505         if (@tagslist) {
5506                 git_tags_body(\@tagslist);
5507         }
5508         git_footer_html();
5509 }
5510
5511 sub git_heads {
5512         my $head = git_get_head_hash($project);
5513         git_header_html();
5514         git_print_page_nav('','', $head,undef,$head);
5515         git_print_header_div('summary', $project);
5516
5517         my @headslist = git_get_heads_list();
5518         if (@headslist) {
5519                 git_heads_body(\@headslist, $head);
5520         }
5521         git_footer_html();
5522 }
5523
5524 sub git_blob_plain {
5525         my $type = shift;
5526         my $expires;
5527
5528         if (!defined $hash) {
5529                 if (defined $file_name) {
5530                         my $base = $hash_base || git_get_head_hash($project);
5531                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5532                                 or die_error(404, "Cannot find file");
5533                 } else {
5534                         die_error(400, "No file name defined");
5535                 }
5536         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5537                 # blobs defined by non-textual hash id's can be cached
5538                 $expires = "+1d";
5539         }
5540
5541         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5542                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5543
5544         # content-type (can include charset)
5545         $type = blob_contenttype($fd, $file_name, $type);
5546
5547         # "save as" filename, even when no $file_name is given
5548         my $save_as = "$hash";
5549         if (defined $file_name) {
5550                 $save_as = $file_name;
5551         } elsif ($type =~ m/^text\//) {
5552                 $save_as .= '.txt';
5553         }
5554
5555         # With XSS prevention on, blobs of all types except a few known safe
5556         # ones are served with "Content-Disposition: attachment" to make sure
5557         # they don't run in our security domain.  For certain image types,
5558         # blob view writes an <img> tag referring to blob_plain view, and we
5559         # want to be sure not to break that by serving the image as an
5560         # attachment (though Firefox 3 doesn't seem to care).
5561         my $sandbox = $prevent_xss &&
5562                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5563
5564         print $cgi->header(
5565                 -type => $type,
5566                 -expires => $expires,
5567                 -content_disposition =>
5568                         ($sandbox ? 'attachment' : 'inline')
5569                         . '; filename="' . $save_as . '"');
5570         local $/ = undef;
5571         binmode STDOUT, ':raw';
5572         print <$fd>;
5573         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5574         close $fd;
5575 }
5576
5577 sub git_blob {
5578         my $expires;
5579
5580         if (!defined $hash) {
5581                 if (defined $file_name) {
5582                         my $base = $hash_base || git_get_head_hash($project);
5583                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5584                                 or die_error(404, "Cannot find file");
5585                 } else {
5586                         die_error(400, "No file name defined");
5587                 }
5588         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5589                 # blobs defined by non-textual hash id's can be cached
5590                 $expires = "+1d";
5591         }
5592
5593         my $have_blame = gitweb_check_feature('blame');
5594         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5595                 or die_error(500, "Couldn't cat $file_name, $hash");
5596         my $mimetype = blob_mimetype($fd, $file_name);
5597         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5598         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5599                 close $fd;
5600                 return git_blob_plain($mimetype);
5601         }
5602         # we can have blame only for text/* mimetype
5603         $have_blame &&= ($mimetype =~ m!^text/!);
5604
5605         my $highlight = gitweb_check_feature('highlight');
5606         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5607         $fd = run_highlighter($fd, $highlight, $syntax)
5608                 if $syntax;
5609
5610         git_header_html(undef, $expires);
5611         my $formats_nav = '';
5612         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5613                 if (defined $file_name) {
5614                         if ($have_blame) {
5615                                 $formats_nav .=
5616                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5617                                                 "blame") .
5618                                         " | ";
5619                         }
5620                         $formats_nav .=
5621                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5622                                         "history") .
5623                                 " | " .
5624                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5625                                         "raw") .
5626                                 " | " .
5627                                 $cgi->a({-href => href(action=>"blob",
5628                                                        hash_base=>"HEAD", file_name=>$file_name)},
5629                                         "HEAD");
5630                 } else {
5631                         $formats_nav .=
5632                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5633                                         "raw");
5634                 }
5635                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5636                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5637         } else {
5638                 print "<div class=\"page_nav\">\n" .
5639                       "<br/><br/></div>\n" .
5640                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5641         }
5642         git_print_page_path($file_name, "blob", $hash_base);
5643         print "<div class=\"page_body\">\n";
5644         if ($mimetype =~ m!^image/!) {
5645                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5646                 if ($file_name) {
5647                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5648                 }
5649                 print qq! src="! .
5650                       href(action=>"blob_plain", hash=>$hash,
5651                            hash_base=>$hash_base, file_name=>$file_name) .
5652                       qq!" />\n!;
5653         } else {
5654                 my $nr;
5655                 while (my $line = <$fd>) {
5656                         chomp $line;
5657                         $nr++;
5658                         $line = untabify($line);
5659                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5660                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5661                 }
5662         }
5663         close $fd
5664                 or print "Reading blob failed.\n";
5665         print "</div>";
5666         git_footer_html();
5667 }
5668
5669 sub git_tree {
5670         if (!defined $hash_base) {
5671                 $hash_base = "HEAD";
5672         }
5673         if (!defined $hash) {
5674                 if (defined $file_name) {
5675                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5676                 } else {
5677                         $hash = $hash_base;
5678                 }
5679         }
5680         die_error(404, "No such tree") unless defined($hash);
5681
5682         my $show_sizes = gitweb_check_feature('show-sizes');
5683         my $have_blame = gitweb_check_feature('blame');
5684
5685         my @entries = ();
5686         {
5687                 local $/ = "\0";
5688                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5689                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5690                         or die_error(500, "Open git-ls-tree failed");
5691                 @entries = map { chomp; $_ } <$fd>;
5692                 close $fd
5693                         or die_error(404, "Reading tree failed");
5694         }
5695
5696         my $refs = git_get_references();
5697         my $ref = format_ref_marker($refs, $hash_base);
5698         git_header_html();
5699         my $basedir = '';
5700         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5701                 my @views_nav = ();
5702                 if (defined $file_name) {
5703                         push @views_nav,
5704                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5705                                         "history"),
5706                                 $cgi->a({-href => href(action=>"tree",
5707                                                        hash_base=>"HEAD", file_name=>$file_name)},
5708                                         "HEAD"),
5709                 }
5710                 my $snapshot_links = format_snapshot_links($hash);
5711                 if (defined $snapshot_links) {
5712                         # FIXME: Should be available when we have no hash base as well.
5713                         push @views_nav, $snapshot_links;
5714                 }
5715                 git_print_page_nav('tree','', $hash_base, undef, undef,
5716                                    join(' | ', @views_nav));
5717                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5718         } else {
5719                 undef $hash_base;
5720                 print "<div class=\"page_nav\">\n";
5721                 print "<br/><br/></div>\n";
5722                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5723         }
5724         if (defined $file_name) {
5725                 $basedir = $file_name;
5726                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5727                         $basedir .= '/';
5728                 }
5729                 git_print_page_path($file_name, 'tree', $hash_base);
5730         }
5731         print "<div class=\"page_body\">\n";
5732         print "<table class=\"tree\">\n";
5733         my $alternate = 1;
5734         # '..' (top directory) link if possible
5735         if (defined $hash_base &&
5736             defined $file_name && $file_name =~ m![^/]+$!) {
5737                 if ($alternate) {
5738                         print "<tr class=\"dark\">\n";
5739                 } else {
5740                         print "<tr class=\"light\">\n";
5741                 }
5742                 $alternate ^= 1;
5743
5744                 my $up = $file_name;
5745                 $up =~ s!/?[^/]+$!!;
5746                 undef $up unless $up;
5747                 # based on git_print_tree_entry
5748                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5749                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5750                 print '<td class="list">';
5751                 print $cgi->a({-href => href(action=>"tree",
5752                                              hash_base=>$hash_base,
5753                                              file_name=>$up)},
5754                               "..");
5755                 print "</td>\n";
5756                 print "<td class=\"link\"></td>\n";
5757
5758                 print "</tr>\n";
5759         }
5760         foreach my $line (@entries) {
5761                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5762
5763                 if ($alternate) {
5764                         print "<tr class=\"dark\">\n";
5765                 } else {
5766                         print "<tr class=\"light\">\n";
5767                 }
5768                 $alternate ^= 1;
5769
5770                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5771
5772                 print "</tr>\n";
5773         }
5774         print "</table>\n" .
5775               "</div>";
5776         git_footer_html();
5777 }
5778
5779 sub snapshot_name {
5780         my ($project, $hash) = @_;
5781
5782         # path/to/project.git  -> project
5783         # path/to/project/.git -> project
5784         my $name = to_utf8($project);
5785         $name =~ s,([^/])/*\.git$,$1,;
5786         $name = basename($name);
5787         # sanitize name
5788         $name =~ s/[[:cntrl:]]/?/g;
5789
5790         my $ver = $hash;
5791         if ($hash =~ /^[0-9a-fA-F]+$/) {
5792                 # shorten SHA-1 hash
5793                 my $full_hash = git_get_full_hash($project, $hash);
5794                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5795                         $ver = git_get_short_hash($project, $hash);
5796                 }
5797         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5798                 # tags don't need shortened SHA-1 hash
5799                 $ver = $1;
5800         } else {
5801                 # branches and other need shortened SHA-1 hash
5802                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5803                         $ver = $1;
5804                 }
5805                 $ver .= '-' . git_get_short_hash($project, $hash);
5806         }
5807         # in case of hierarchical branch names
5808         $ver =~ s!/!.!g;
5809
5810         # name = project-version_string
5811         $name = "$name-$ver";
5812
5813         return wantarray ? ($name, $name) : $name;
5814 }
5815
5816 sub git_snapshot {
5817         my $format = $input_params{'snapshot_format'};
5818         if (!@snapshot_fmts) {
5819                 die_error(403, "Snapshots not allowed");
5820         }
5821         # default to first supported snapshot format
5822         $format ||= $snapshot_fmts[0];
5823         if ($format !~ m/^[a-z0-9]+$/) {
5824                 die_error(400, "Invalid snapshot format parameter");
5825         } elsif (!exists($known_snapshot_formats{$format})) {
5826                 die_error(400, "Unknown snapshot format");
5827         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5828                 die_error(403, "Snapshot format not allowed");
5829         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5830                 die_error(403, "Unsupported snapshot format");
5831         }
5832
5833         my $type = git_get_type("$hash^{}");
5834         if (!$type) {
5835                 die_error(404, 'Object does not exist');
5836         }  elsif ($type eq 'blob') {
5837                 die_error(400, 'Object is not a tree-ish');
5838         }
5839
5840         my ($name, $prefix) = snapshot_name($project, $hash);
5841         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5842         my $cmd = quote_command(
5843                 git_cmd(), 'archive',
5844                 "--format=$known_snapshot_formats{$format}{'format'}",
5845                 "--prefix=$prefix/", $hash);
5846         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5847                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5848         }
5849
5850         $filename =~ s/(["\\])/\\$1/g;
5851         print $cgi->header(
5852                 -type => $known_snapshot_formats{$format}{'type'},
5853                 -content_disposition => 'inline; filename="' . $filename . '"',
5854                 -status => '200 OK');
5855
5856         open my $fd, "-|", $cmd
5857                 or die_error(500, "Execute git-archive failed");
5858         binmode STDOUT, ':raw';
5859         print <$fd>;
5860         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5861         close $fd;
5862 }
5863
5864 sub git_log_generic {
5865         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5866
5867         my $head = git_get_head_hash($project);
5868         if (!defined $base) {
5869                 $base = $head;
5870         }
5871         if (!defined $page) {
5872                 $page = 0;
5873         }
5874         my $refs = git_get_references();
5875
5876         my $commit_hash = $base;
5877         if (defined $parent) {
5878                 $commit_hash = "$parent..$base";
5879         }
5880         my @commitlist =
5881                 parse_commits($commit_hash, 101, (100 * $page),
5882                               defined $file_name ? ($file_name, "--full-history") : ());
5883
5884         my $ftype;
5885         if (!defined $file_hash && defined $file_name) {
5886                 # some commits could have deleted file in question,
5887                 # and not have it in tree, but one of them has to have it
5888                 for (my $i = 0; $i < @commitlist; $i++) {
5889                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5890                         last if defined $file_hash;
5891                 }
5892         }
5893         if (defined $file_hash) {
5894                 $ftype = git_get_type($file_hash);
5895         }
5896         if (defined $file_name && !defined $ftype) {
5897                 die_error(500, "Unknown type of object");
5898         }
5899         my %co;
5900         if (defined $file_name) {
5901                 %co = parse_commit($base)
5902                         or die_error(404, "Unknown commit object");
5903         }
5904
5905
5906         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5907         my $next_link = '';
5908         if ($#commitlist >= 100) {
5909                 $next_link =
5910                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5911                                  -accesskey => "n", -title => "Alt-n"}, "next");
5912         }
5913         my $patch_max = gitweb_get_feature('patches');
5914         if ($patch_max && !defined $file_name) {
5915                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5916                         $paging_nav .= " &sdot; " .
5917                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5918                                         "patches");
5919                 }
5920         }
5921
5922         git_header_html();
5923         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5924         if (defined $file_name) {
5925                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5926         } else {
5927                 git_print_header_div('summary', $project)
5928         }
5929         git_print_page_path($file_name, $ftype, $hash_base)
5930                 if (defined $file_name);
5931
5932         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5933                      $file_name, $file_hash, $ftype);
5934
5935         git_footer_html();
5936 }
5937
5938 sub git_log {
5939         git_log_generic('log', \&git_log_body,
5940                         $hash, $hash_parent);
5941 }
5942
5943 sub git_commit {
5944         $hash ||= $hash_base || "HEAD";
5945         my %co = parse_commit($hash)
5946             or die_error(404, "Unknown commit object");
5947
5948         my $parent  = $co{'parent'};
5949         my $parents = $co{'parents'}; # listref
5950
5951         # we need to prepare $formats_nav before any parameter munging
5952         my $formats_nav;
5953         if (!defined $parent) {
5954                 # --root commitdiff
5955                 $formats_nav .= '(initial)';
5956         } elsif (@$parents == 1) {
5957                 # single parent commit
5958                 $formats_nav .=
5959                         '(parent: ' .
5960                         $cgi->a({-href => href(action=>"commit",
5961                                                hash=>$parent)},
5962                                 esc_html(substr($parent, 0, 7))) .
5963                         ')';
5964         } else {
5965                 # merge commit
5966                 $formats_nav .=
5967                         '(merge: ' .
5968                         join(' ', map {
5969                                 $cgi->a({-href => href(action=>"commit",
5970                                                        hash=>$_)},
5971                                         esc_html(substr($_, 0, 7)));
5972                         } @$parents ) .
5973                         ')';
5974         }
5975         if (gitweb_check_feature('patches') && @$parents <= 1) {
5976                 $formats_nav .= " | " .
5977                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5978                                 "patch");
5979         }
5980
5981         if (!defined $parent) {
5982                 $parent = "--root";
5983         }
5984         my @difftree;
5985         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5986                 @diff_opts,
5987                 (@$parents <= 1 ? $parent : '-c'),
5988                 $hash, "--"
5989                 or die_error(500, "Open git-diff-tree failed");
5990         @difftree = map { chomp; $_ } <$fd>;
5991         close $fd or die_error(404, "Reading git-diff-tree failed");
5992
5993         # non-textual hash id's can be cached
5994         my $expires;
5995         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5996                 $expires = "+1d";
5997         }
5998         my $refs = git_get_references();
5999         my $ref = format_ref_marker($refs, $co{'id'});
6000
6001         git_header_html(undef, $expires);
6002         git_print_page_nav('commit', '',
6003                            $hash, $co{'tree'}, $hash,
6004                            $formats_nav);
6005
6006         if (defined $co{'parent'}) {
6007                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6008         } else {
6009                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6010         }
6011         print "<div class=\"title_text\">\n" .
6012               "<table class=\"object_header\">\n";
6013         git_print_authorship_rows(\%co);
6014         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6015         print "<tr>" .
6016               "<td>tree</td>" .
6017               "<td class=\"sha1\">" .
6018               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6019                        class => "list"}, $co{'tree'}) .
6020               "</td>" .
6021               "<td class=\"link\">" .
6022               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6023                       "tree");
6024         my $snapshot_links = format_snapshot_links($hash);
6025         if (defined $snapshot_links) {
6026                 print " | " . $snapshot_links;
6027         }
6028         print "</td>" .
6029               "</tr>\n";
6030
6031         foreach my $par (@$parents) {
6032                 print "<tr>" .
6033                       "<td>parent</td>" .
6034                       "<td class=\"sha1\">" .
6035                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6036                                class => "list"}, $par) .
6037                       "</td>" .
6038                       "<td class=\"link\">" .
6039                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6040                       " | " .
6041                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6042                       "</td>" .
6043                       "</tr>\n";
6044         }
6045         print "</table>".
6046               "</div>\n";
6047
6048         print "<div class=\"page_body\">\n";
6049         git_print_log($co{'comment'});
6050         print "</div>\n";
6051
6052         git_difftree_body(\@difftree, $hash, @$parents);
6053
6054         git_footer_html();
6055 }
6056
6057 sub git_object {
6058         # object is defined by:
6059         # - hash or hash_base alone
6060         # - hash_base and file_name
6061         my $type;
6062
6063         # - hash or hash_base alone
6064         if ($hash || ($hash_base && !defined $file_name)) {
6065                 my $object_id = $hash || $hash_base;
6066
6067                 open my $fd, "-|", quote_command(
6068                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6069                         or die_error(404, "Object does not exist");
6070                 $type = <$fd>;
6071                 chomp $type;
6072                 close $fd
6073                         or die_error(404, "Object does not exist");
6074
6075         # - hash_base and file_name
6076         } elsif ($hash_base && defined $file_name) {
6077                 $file_name =~ s,/+$,,;
6078
6079                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6080                         or die_error(404, "Base object does not exist");
6081
6082                 # here errors should not hapen
6083                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6084                         or die_error(500, "Open git-ls-tree failed");
6085                 my $line = <$fd>;
6086                 close $fd;
6087
6088                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6089                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6090                         die_error(404, "File or directory for given base does not exist");
6091                 }
6092                 $type = $2;
6093                 $hash = $3;
6094         } else {
6095                 die_error(400, "Not enough information to find object");
6096         }
6097
6098         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6099                                           hash=>$hash, hash_base=>$hash_base,
6100                                           file_name=>$file_name),
6101                              -status => '302 Found');
6102 }
6103
6104 sub git_blobdiff {
6105         my $format = shift || 'html';
6106
6107         my $fd;
6108         my @difftree;
6109         my %diffinfo;
6110         my $expires;
6111
6112         # preparing $fd and %diffinfo for git_patchset_body
6113         # new style URI
6114         if (defined $hash_base && defined $hash_parent_base) {
6115                 if (defined $file_name) {
6116                         # read raw output
6117                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6118                                 $hash_parent_base, $hash_base,
6119                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6120                                 or die_error(500, "Open git-diff-tree failed");
6121                         @difftree = map { chomp; $_ } <$fd>;
6122                         close $fd
6123                                 or die_error(404, "Reading git-diff-tree failed");
6124                         @difftree
6125                                 or die_error(404, "Blob diff not found");
6126
6127                 } elsif (defined $hash &&
6128                          $hash =~ /[0-9a-fA-F]{40}/) {
6129                         # try to find filename from $hash
6130
6131                         # read filtered raw output
6132                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6133                                 $hash_parent_base, $hash_base, "--"
6134                                 or die_error(500, "Open git-diff-tree failed");
6135                         @difftree =
6136                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6137                                 # $hash == to_id
6138                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6139                                 map { chomp; $_ } <$fd>;
6140                         close $fd
6141                                 or die_error(404, "Reading git-diff-tree failed");
6142                         @difftree
6143                                 or die_error(404, "Blob diff not found");
6144
6145                 } else {
6146                         die_error(400, "Missing one of the blob diff parameters");
6147                 }
6148
6149                 if (@difftree > 1) {
6150                         die_error(400, "Ambiguous blob diff specification");
6151                 }
6152
6153                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6154                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6155                 $file_name   ||= $diffinfo{'to_file'};
6156
6157                 $hash_parent ||= $diffinfo{'from_id'};
6158                 $hash        ||= $diffinfo{'to_id'};
6159
6160                 # non-textual hash id's can be cached
6161                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6162                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6163                         $expires = '+1d';
6164                 }
6165
6166                 # open patch output
6167                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6168                         '-p', ($format eq 'html' ? "--full-index" : ()),
6169                         $hash_parent_base, $hash_base,
6170                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6171                         or die_error(500, "Open git-diff-tree failed");
6172         }
6173
6174         # old/legacy style URI -- not generated anymore since 1.4.3.
6175         if (!%diffinfo) {
6176                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6177         }
6178
6179         # header
6180         if ($format eq 'html') {
6181                 my $formats_nav =
6182                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6183                                 "raw");
6184                 git_header_html(undef, $expires);
6185                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6186                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6187                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6188                 } else {
6189                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6190                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6191                 }
6192                 if (defined $file_name) {
6193                         git_print_page_path($file_name, "blob", $hash_base);
6194                 } else {
6195                         print "<div class=\"page_path\"></div>\n";
6196                 }
6197
6198         } elsif ($format eq 'plain') {
6199                 print $cgi->header(
6200                         -type => 'text/plain',
6201                         -charset => 'utf-8',
6202                         -expires => $expires,
6203                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6204
6205                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6206
6207         } else {
6208                 die_error(400, "Unknown blobdiff format");
6209         }
6210
6211         # patch
6212         if ($format eq 'html') {
6213                 print "<div class=\"page_body\">\n";
6214
6215                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6216                 close $fd;
6217
6218                 print "</div>\n"; # class="page_body"
6219                 git_footer_html();
6220
6221         } else {
6222                 while (my $line = <$fd>) {
6223                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6224                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6225
6226                         print $line;
6227
6228                         last if $line =~ m!^\+\+\+!;
6229                 }
6230                 local $/ = undef;
6231                 print <$fd>;
6232                 close $fd;
6233         }
6234 }
6235
6236 sub git_blobdiff_plain {
6237         git_blobdiff('plain');
6238 }
6239
6240 sub git_commitdiff {
6241         my %params = @_;
6242         my $format = $params{-format} || 'html';
6243
6244         my ($patch_max) = gitweb_get_feature('patches');
6245         if ($format eq 'patch') {
6246                 die_error(403, "Patch view not allowed") unless $patch_max;
6247         }
6248
6249         $hash ||= $hash_base || "HEAD";
6250         my %co = parse_commit($hash)
6251             or die_error(404, "Unknown commit object");
6252
6253         # choose format for commitdiff for merge
6254         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6255                 $hash_parent = '--cc';
6256         }
6257         # we need to prepare $formats_nav before almost any parameter munging
6258         my $formats_nav;
6259         if ($format eq 'html') {
6260                 $formats_nav =
6261                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6262                                 "raw");
6263                 if ($patch_max && @{$co{'parents'}} <= 1) {
6264                         $formats_nav .= " | " .
6265                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6266                                         "patch");
6267                 }
6268
6269                 if (defined $hash_parent &&
6270                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6271                         # commitdiff with two commits given
6272                         my $hash_parent_short = $hash_parent;
6273                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6274                                 $hash_parent_short = substr($hash_parent, 0, 7);
6275                         }
6276                         $formats_nav .=
6277                                 ' (from';
6278                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6279                                 if ($co{'parents'}[$i] eq $hash_parent) {
6280                                         $formats_nav .= ' parent ' . ($i+1);
6281                                         last;
6282                                 }
6283                         }
6284                         $formats_nav .= ': ' .
6285                                 $cgi->a({-href => href(action=>"commitdiff",
6286                                                        hash=>$hash_parent)},
6287                                         esc_html($hash_parent_short)) .
6288                                 ')';
6289                 } elsif (!$co{'parent'}) {
6290                         # --root commitdiff
6291                         $formats_nav .= ' (initial)';
6292                 } elsif (scalar @{$co{'parents'}} == 1) {
6293                         # single parent commit
6294                         $formats_nav .=
6295                                 ' (parent: ' .
6296                                 $cgi->a({-href => href(action=>"commitdiff",
6297                                                        hash=>$co{'parent'})},
6298                                         esc_html(substr($co{'parent'}, 0, 7))) .
6299                                 ')';
6300                 } else {
6301                         # merge commit
6302                         if ($hash_parent eq '--cc') {
6303                                 $formats_nav .= ' | ' .
6304                                         $cgi->a({-href => href(action=>"commitdiff",
6305                                                                hash=>$hash, hash_parent=>'-c')},
6306                                                 'combined');
6307                         } else { # $hash_parent eq '-c'
6308                                 $formats_nav .= ' | ' .
6309                                         $cgi->a({-href => href(action=>"commitdiff",
6310                                                                hash=>$hash, hash_parent=>'--cc')},
6311                                                 'compact');
6312                         }
6313                         $formats_nav .=
6314                                 ' (merge: ' .
6315                                 join(' ', map {
6316                                         $cgi->a({-href => href(action=>"commitdiff",
6317                                                                hash=>$_)},
6318                                                 esc_html(substr($_, 0, 7)));
6319                                 } @{$co{'parents'}} ) .
6320                                 ')';
6321                 }
6322         }
6323
6324         my $hash_parent_param = $hash_parent;
6325         if (!defined $hash_parent_param) {
6326                 # --cc for multiple parents, --root for parentless
6327                 $hash_parent_param =
6328                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6329         }
6330
6331         # read commitdiff
6332         my $fd;
6333         my @difftree;
6334         if ($format eq 'html') {
6335                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6336                         "--no-commit-id", "--patch-with-raw", "--full-index",
6337                         $hash_parent_param, $hash, "--"
6338                         or die_error(500, "Open git-diff-tree failed");
6339
6340                 while (my $line = <$fd>) {
6341                         chomp $line;
6342                         # empty line ends raw part of diff-tree output
6343                         last unless $line;
6344                         push @difftree, scalar parse_difftree_raw_line($line);
6345                 }
6346
6347         } elsif ($format eq 'plain') {
6348                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6349                         '-p', $hash_parent_param, $hash, "--"
6350                         or die_error(500, "Open git-diff-tree failed");
6351         } elsif ($format eq 'patch') {
6352                 # For commit ranges, we limit the output to the number of
6353                 # patches specified in the 'patches' feature.
6354                 # For single commits, we limit the output to a single patch,
6355                 # diverging from the git-format-patch default.
6356                 my @commit_spec = ();
6357                 if ($hash_parent) {
6358                         if ($patch_max > 0) {
6359                                 push @commit_spec, "-$patch_max";
6360                         }
6361                         push @commit_spec, '-n', "$hash_parent..$hash";
6362                 } else {
6363                         if ($params{-single}) {
6364                                 push @commit_spec, '-1';
6365                         } else {
6366                                 if ($patch_max > 0) {
6367                                         push @commit_spec, "-$patch_max";
6368                                 }
6369                                 push @commit_spec, "-n";
6370                         }
6371                         push @commit_spec, '--root', $hash;
6372                 }
6373                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6374                         '--encoding=utf8', '--stdout', @commit_spec
6375                         or die_error(500, "Open git-format-patch failed");
6376         } else {
6377                 die_error(400, "Unknown commitdiff format");
6378         }
6379
6380         # non-textual hash id's can be cached
6381         my $expires;
6382         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6383                 $expires = "+1d";
6384         }
6385
6386         # write commit message
6387         if ($format eq 'html') {
6388                 my $refs = git_get_references();
6389                 my $ref = format_ref_marker($refs, $co{'id'});
6390
6391                 git_header_html(undef, $expires);
6392                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6393                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6394                 print "<div class=\"title_text\">\n" .
6395                       "<table class=\"object_header\">\n";
6396                 git_print_authorship_rows(\%co);
6397                 print "</table>".
6398                       "</div>\n";
6399                 print "<div class=\"page_body\">\n";
6400                 if (@{$co{'comment'}} > 1) {
6401                         print "<div class=\"log\">\n";
6402                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6403                         print "</div>\n"; # class="log"
6404                 }
6405
6406         } elsif ($format eq 'plain') {
6407                 my $refs = git_get_references("tags");
6408                 my $tagname = git_get_rev_name_tags($hash);
6409                 my $filename = basename($project) . "-$hash.patch";
6410
6411                 print $cgi->header(
6412                         -type => 'text/plain',
6413                         -charset => 'utf-8',
6414                         -expires => $expires,
6415                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6416                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6417                 print "From: " . to_utf8($co{'author'}) . "\n";
6418                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6419                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6420
6421                 print "X-Git-Tag: $tagname\n" if $tagname;
6422                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6423
6424                 foreach my $line (@{$co{'comment'}}) {
6425                         print to_utf8($line) . "\n";
6426                 }
6427                 print "---\n\n";
6428         } elsif ($format eq 'patch') {
6429                 my $filename = basename($project) . "-$hash.patch";
6430
6431                 print $cgi->header(
6432                         -type => 'text/plain',
6433                         -charset => 'utf-8',
6434                         -expires => $expires,
6435                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6436         }
6437
6438         # write patch
6439         if ($format eq 'html') {
6440                 my $use_parents = !defined $hash_parent ||
6441                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6442                 git_difftree_body(\@difftree, $hash,
6443                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6444                 print "<br/>\n";
6445
6446                 git_patchset_body($fd, \@difftree, $hash,
6447                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6448                 close $fd;
6449                 print "</div>\n"; # class="page_body"
6450                 git_footer_html();
6451
6452         } elsif ($format eq 'plain') {
6453                 local $/ = undef;
6454                 print <$fd>;
6455                 close $fd
6456                         or print "Reading git-diff-tree failed\n";
6457         } elsif ($format eq 'patch') {
6458                 local $/ = undef;
6459                 print <$fd>;
6460                 close $fd
6461                         or print "Reading git-format-patch failed\n";
6462         }
6463 }
6464
6465 sub git_commitdiff_plain {
6466         git_commitdiff(-format => 'plain');
6467 }
6468
6469 # format-patch-style patches
6470 sub git_patch {
6471         git_commitdiff(-format => 'patch', -single => 1);
6472 }
6473
6474 sub git_patches {
6475         git_commitdiff(-format => 'patch');
6476 }
6477
6478 sub git_history {
6479         git_log_generic('history', \&git_history_body,
6480                         $hash_base, $hash_parent_base,
6481                         $file_name, $hash);
6482 }
6483
6484 sub git_search {
6485         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6486         if (!defined $searchtext) {
6487                 die_error(400, "Text field is empty");
6488         }
6489         if (!defined $hash) {
6490                 $hash = git_get_head_hash($project);
6491         }
6492         my %co = parse_commit($hash);
6493         if (!%co) {
6494                 die_error(404, "Unknown commit object");
6495         }
6496         if (!defined $page) {
6497                 $page = 0;
6498         }
6499
6500         $searchtype ||= 'commit';
6501         if ($searchtype eq 'pickaxe') {
6502                 # pickaxe may take all resources of your box and run for several minutes
6503                 # with every query - so decide by yourself how public you make this feature
6504                 gitweb_check_feature('pickaxe')
6505                     or die_error(403, "Pickaxe is disabled");
6506         }
6507         if ($searchtype eq 'grep') {
6508                 gitweb_check_feature('grep')
6509                     or die_error(403, "Grep is disabled");
6510         }
6511
6512         git_header_html();
6513
6514         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6515                 my $greptype;
6516                 if ($searchtype eq 'commit') {
6517                         $greptype = "--grep=";
6518                 } elsif ($searchtype eq 'author') {
6519                         $greptype = "--author=";
6520                 } elsif ($searchtype eq 'committer') {
6521                         $greptype = "--committer=";
6522                 }
6523                 $greptype .= $searchtext;
6524                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6525                                                $greptype, '--regexp-ignore-case',
6526                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6527
6528                 my $paging_nav = '';
6529                 if ($page > 0) {
6530                         $paging_nav .=
6531                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6532                                                        searchtext=>$searchtext,
6533                                                        searchtype=>$searchtype)},
6534                                         "first");
6535                         $paging_nav .= " &sdot; " .
6536                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6537                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6538                 } else {
6539                         $paging_nav .= "first";
6540                         $paging_nav .= " &sdot; prev";
6541                 }
6542                 my $next_link = '';
6543                 if ($#commitlist >= 100) {
6544                         $next_link =
6545                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6546                                          -accesskey => "n", -title => "Alt-n"}, "next");
6547                         $paging_nav .= " &sdot; $next_link";
6548                 } else {
6549                         $paging_nav .= " &sdot; next";
6550                 }
6551
6552                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6553                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6554                 if ($page == 0 && !@commitlist) {
6555                         print "<p>No match.</p>\n";
6556                 } else {
6557                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6558                 }
6559         }
6560
6561         if ($searchtype eq 'pickaxe') {
6562                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6563                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6564
6565                 print "<table class=\"pickaxe search\">\n";
6566                 my $alternate = 1;
6567                 local $/ = "\n";
6568                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6569                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6570                         ($search_use_regexp ? '--pickaxe-regex' : ());
6571                 undef %co;
6572                 my @files;
6573                 while (my $line = <$fd>) {
6574                         chomp $line;
6575                         next unless $line;
6576
6577                         my %set = parse_difftree_raw_line($line);
6578                         if (defined $set{'commit'}) {
6579                                 # finish previous commit
6580                                 if (%co) {
6581                                         print "</td>\n" .
6582                                               "<td class=\"link\">" .
6583                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6584                                               " | " .
6585                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6586                                         print "</td>\n" .
6587                                               "</tr>\n";
6588                                 }
6589
6590                                 if ($alternate) {
6591                                         print "<tr class=\"dark\">\n";
6592                                 } else {
6593                                         print "<tr class=\"light\">\n";
6594                                 }
6595                                 $alternate ^= 1;
6596                                 %co = parse_commit($set{'commit'});
6597                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6598                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6599                                       "<td><i>$author</i></td>\n" .
6600                                       "<td>" .
6601                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6602                                               -class => "list subject"},
6603                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6604                         } elsif (defined $set{'to_id'}) {
6605                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6606
6607                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6608                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6609                                               -class => "list"},
6610                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6611                                       "<br/>\n";
6612                         }
6613                 }
6614                 close $fd;
6615
6616                 # finish last commit (warning: repetition!)
6617                 if (%co) {
6618                         print "</td>\n" .
6619                               "<td class=\"link\">" .
6620                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6621                               " | " .
6622                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6623                         print "</td>\n" .
6624                               "</tr>\n";
6625                 }
6626
6627                 print "</table>\n";
6628         }
6629
6630         if ($searchtype eq 'grep') {
6631                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6632                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6633
6634                 print "<table class=\"grep_search\">\n";
6635                 my $alternate = 1;
6636                 my $matches = 0;
6637                 local $/ = "\n";
6638                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6639                         $search_use_regexp ? ('-E', '-i') : '-F',
6640                         $searchtext, $co{'tree'};
6641                 my $lastfile = '';
6642                 while (my $line = <$fd>) {
6643                         chomp $line;
6644                         my ($file, $lno, $ltext, $binary);
6645                         last if ($matches++ > 1000);
6646                         if ($line =~ /^Binary file (.+) matches$/) {
6647                                 $file = $1;
6648                                 $binary = 1;
6649                         } else {
6650                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6651                         }
6652                         if ($file ne $lastfile) {
6653                                 $lastfile and print "</td></tr>\n";
6654                                 if ($alternate++) {
6655                                         print "<tr class=\"dark\">\n";
6656                                 } else {
6657                                         print "<tr class=\"light\">\n";
6658                                 }
6659                                 print "<td class=\"list\">".
6660                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6661                                                                file_name=>"$file"),
6662                                                 -class => "list"}, esc_path($file));
6663                                 print "</td><td>\n";
6664                                 $lastfile = $file;
6665                         }
6666                         if ($binary) {
6667                                 print "<div class=\"binary\">Binary file</div>\n";
6668                         } else {
6669                                 $ltext = untabify($ltext);
6670                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6671                                         $ltext = esc_html($1, -nbsp=>1);
6672                                         $ltext .= '<span class="match">';
6673                                         $ltext .= esc_html($2, -nbsp=>1);
6674                                         $ltext .= '</span>';
6675                                         $ltext .= esc_html($3, -nbsp=>1);
6676                                 } else {
6677                                         $ltext = esc_html($ltext, -nbsp=>1);
6678                                 }
6679                                 print "<div class=\"pre\">" .
6680                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6681                                                                file_name=>"$file").'#l'.$lno,
6682                                                 -class => "linenr"}, sprintf('%4i', $lno))
6683                                         . ' ' .  $ltext . "</div>\n";
6684                         }
6685                 }
6686                 if ($lastfile) {
6687                         print "</td></tr>\n";
6688                         if ($matches > 1000) {
6689                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6690                         }
6691                 } else {
6692                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6693                 }
6694                 close $fd;
6695
6696                 print "</table>\n";
6697         }
6698         git_footer_html();
6699 }
6700
6701 sub git_search_help {
6702         git_header_html();
6703         git_print_page_nav('','', $hash,$hash,$hash);
6704         print <<EOT;
6705 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6706 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6707 the pattern entered is recognized as the POSIX extended
6708 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6709 insensitive).</p>
6710 <dl>
6711 <dt><b>commit</b></dt>
6712 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6713 EOT
6714         my $have_grep = gitweb_check_feature('grep');
6715         if ($have_grep) {
6716                 print <<EOT;
6717 <dt><b>grep</b></dt>
6718 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6719     a different one) are searched for the given pattern. On large trees, this search can take
6720 a while and put some strain on the server, so please use it with some consideration. Note that
6721 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6722 case-sensitive.</dd>
6723 EOT
6724         }
6725         print <<EOT;
6726 <dt><b>author</b></dt>
6727 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6728 <dt><b>committer</b></dt>
6729 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6730 EOT
6731         my $have_pickaxe = gitweb_check_feature('pickaxe');
6732         if ($have_pickaxe) {
6733                 print <<EOT;
6734 <dt><b>pickaxe</b></dt>
6735 <dd>All commits that caused the string to appear or disappear from any file (changes that
6736 added, removed or "modified" the string) will be listed. This search can take a while and
6737 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6738 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6739 EOT
6740         }
6741         print "</dl>\n";
6742         git_footer_html();
6743 }
6744
6745 sub git_shortlog {
6746         git_log_generic('shortlog', \&git_shortlog_body,
6747                         $hash, $hash_parent);
6748 }
6749
6750 ## ......................................................................
6751 ## feeds (RSS, Atom; OPML)
6752
6753 sub git_feed {
6754         my $format = shift || 'atom';
6755         my $have_blame = gitweb_check_feature('blame');
6756
6757         # Atom: http://www.atomenabled.org/developers/syndication/
6758         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6759         if ($format ne 'rss' && $format ne 'atom') {
6760                 die_error(400, "Unknown web feed format");
6761         }
6762
6763         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6764         my $head = $hash || 'HEAD';
6765         my @commitlist = parse_commits($head, 150, 0, $file_name);
6766
6767         my %latest_commit;
6768         my %latest_date;
6769         my $content_type = "application/$format+xml";
6770         if (defined $cgi->http('HTTP_ACCEPT') &&
6771                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6772                 # browser (feed reader) prefers text/xml
6773                 $content_type = 'text/xml';
6774         }
6775         if (defined($commitlist[0])) {
6776                 %latest_commit = %{$commitlist[0]};
6777                 my $latest_epoch = $latest_commit{'committer_epoch'};
6778                 %latest_date   = parse_date($latest_epoch);
6779                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6780                 if (defined $if_modified) {
6781                         my $since;
6782                         if (eval { require HTTP::Date; 1; }) {
6783                                 $since = HTTP::Date::str2time($if_modified);
6784                         } elsif (eval { require Time::ParseDate; 1; }) {
6785                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6786                         }
6787                         if (defined $since && $latest_epoch <= $since) {
6788                                 print $cgi->header(
6789                                         -type => $content_type,
6790                                         -charset => 'utf-8',
6791                                         -last_modified => $latest_date{'rfc2822'},
6792                                         -status => '304 Not Modified');
6793                                 return;
6794                         }
6795                 }
6796                 print $cgi->header(
6797                         -type => $content_type,
6798                         -charset => 'utf-8',
6799                         -last_modified => $latest_date{'rfc2822'});
6800         } else {
6801                 print $cgi->header(
6802                         -type => $content_type,
6803                         -charset => 'utf-8');
6804         }
6805
6806         # Optimization: skip generating the body if client asks only
6807         # for Last-Modified date.
6808         return if ($cgi->request_method() eq 'HEAD');
6809
6810         # header variables
6811         my $title = "$site_name - $project/$action";
6812         my $feed_type = 'log';
6813         if (defined $hash) {
6814                 $title .= " - '$hash'";
6815                 $feed_type = 'branch log';
6816                 if (defined $file_name) {
6817                         $title .= " :: $file_name";
6818                         $feed_type = 'history';
6819                 }
6820         } elsif (defined $file_name) {
6821                 $title .= " - $file_name";
6822                 $feed_type = 'history';
6823         }
6824         $title .= " $feed_type";
6825         my $descr = git_get_project_description($project);
6826         if (defined $descr) {
6827                 $descr = esc_html($descr);
6828         } else {
6829                 $descr = "$project " .
6830                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6831                          " feed";
6832         }
6833         my $owner = git_get_project_owner($project);
6834         $owner = esc_html($owner);
6835
6836         #header
6837         my $alt_url;
6838         if (defined $file_name) {
6839                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6840         } elsif (defined $hash) {
6841                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6842         } else {
6843                 $alt_url = href(-full=>1, action=>"summary");
6844         }
6845         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6846         if ($format eq 'rss') {
6847                 print <<XML;
6848 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6849 <channel>
6850 XML
6851                 print "<title>$title</title>\n" .
6852                       "<link>$alt_url</link>\n" .
6853                       "<description>$descr</description>\n" .
6854                       "<language>en</language>\n" .
6855                       # project owner is responsible for 'editorial' content
6856                       "<managingEditor>$owner</managingEditor>\n";
6857                 if (defined $logo || defined $favicon) {
6858                         # prefer the logo to the favicon, since RSS
6859                         # doesn't allow both
6860                         my $img = esc_url($logo || $favicon);
6861                         print "<image>\n" .
6862                               "<url>$img</url>\n" .
6863                               "<title>$title</title>\n" .
6864                               "<link>$alt_url</link>\n" .
6865                               "</image>\n";
6866                 }
6867                 if (%latest_date) {
6868                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6869                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6870                 }
6871                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6872         } elsif ($format eq 'atom') {
6873                 print <<XML;
6874 <feed xmlns="http://www.w3.org/2005/Atom">
6875 XML
6876                 print "<title>$title</title>\n" .
6877                       "<subtitle>$descr</subtitle>\n" .
6878                       '<link rel="alternate" type="text/html" href="' .
6879                       $alt_url . '" />' . "\n" .
6880                       '<link rel="self" type="' . $content_type . '" href="' .
6881                       $cgi->self_url() . '" />' . "\n" .
6882                       "<id>" . href(-full=>1) . "</id>\n" .
6883                       # use project owner for feed author
6884                       "<author><name>$owner</name></author>\n";
6885                 if (defined $favicon) {
6886                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6887                 }
6888                 if (defined $logo) {
6889                         # not twice as wide as tall: 72 x 27 pixels
6890                         print "<logo>" . esc_url($logo) . "</logo>\n";
6891                 }
6892                 if (! %latest_date) {
6893                         # dummy date to keep the feed valid until commits trickle in:
6894                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6895                 } else {
6896                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6897                 }
6898                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6899         }
6900
6901         # contents
6902         for (my $i = 0; $i <= $#commitlist; $i++) {
6903                 my %co = %{$commitlist[$i]};
6904                 my $commit = $co{'id'};
6905                 # we read 150, we always show 30 and the ones more recent than 48 hours
6906                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6907                         last;
6908                 }
6909                 my %cd = parse_date($co{'author_epoch'});
6910
6911                 # get list of changed files
6912                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6913                         $co{'parent'} || "--root",
6914                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6915                         or next;
6916                 my @difftree = map { chomp; $_ } <$fd>;
6917                 close $fd
6918                         or next;
6919
6920                 # print element (entry, item)
6921                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6922                 if ($format eq 'rss') {
6923                         print "<item>\n" .
6924                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6925                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6926                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6927                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6928                               "<link>$co_url</link>\n" .
6929                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6930                               "<content:encoded>" .
6931                               "<![CDATA[\n";
6932                 } elsif ($format eq 'atom') {
6933                         print "<entry>\n" .
6934                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6935                               "<updated>$cd{'iso-8601'}</updated>\n" .
6936                               "<author>\n" .
6937                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6938                         if ($co{'author_email'}) {
6939                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6940                         }
6941                         print "</author>\n" .
6942                               # use committer for contributor
6943                               "<contributor>\n" .
6944                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6945                         if ($co{'committer_email'}) {
6946                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6947                         }
6948                         print "</contributor>\n" .
6949                               "<published>$cd{'iso-8601'}</published>\n" .
6950                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6951                               "<id>$co_url</id>\n" .
6952                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6953                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6954                 }
6955                 my $comment = $co{'comment'};
6956                 print "<pre>\n";
6957                 foreach my $line (@$comment) {
6958                         $line = esc_html($line);
6959                         print "$line\n";
6960                 }
6961                 print "</pre><ul>\n";
6962                 foreach my $difftree_line (@difftree) {
6963                         my %difftree = parse_difftree_raw_line($difftree_line);
6964                         next if !$difftree{'from_id'};
6965
6966                         my $file = $difftree{'file'} || $difftree{'to_file'};
6967
6968                         print "<li>" .
6969                               "[" .
6970                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6971                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6972                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6973                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6974                                       -title => "diff"}, 'D');
6975                         if ($have_blame) {
6976                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6977                                                              file_name=>$file, hash_base=>$commit),
6978                                               -title => "blame"}, 'B');
6979                         }
6980                         # if this is not a feed of a file history
6981                         if (!defined $file_name || $file_name ne $file) {
6982                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6983                                                              file_name=>$file, hash=>$commit),
6984                                               -title => "history"}, 'H');
6985                         }
6986                         $file = esc_path($file);
6987                         print "] ".
6988                               "$file</li>\n";
6989                 }
6990                 if ($format eq 'rss') {
6991                         print "</ul>]]>\n" .
6992                               "</content:encoded>\n" .
6993                               "</item>\n";
6994                 } elsif ($format eq 'atom') {
6995                         print "</ul>\n</div>\n" .
6996                               "</content>\n" .
6997                               "</entry>\n";
6998                 }
6999         }
7000
7001         # end of feed
7002         if ($format eq 'rss') {
7003                 print "</channel>\n</rss>\n";
7004         } elsif ($format eq 'atom') {
7005                 print "</feed>\n";
7006         }
7007 }
7008
7009 sub git_rss {
7010         git_feed('rss');
7011 }
7012
7013 sub git_atom {
7014         git_feed('atom');
7015 }
7016
7017 sub git_opml {
7018         my @list = git_get_projects_list();
7019
7020         print $cgi->header(
7021                 -type => 'text/xml',
7022                 -charset => 'utf-8',
7023                 -content_disposition => 'inline; filename="opml.xml"');
7024
7025         print <<XML;
7026 <?xml version="1.0" encoding="utf-8"?>
7027 <opml version="1.0">
7028 <head>
7029   <title>$site_name OPML Export</title>
7030 </head>
7031 <body>
7032 <outline text="git RSS feeds">
7033 XML
7034
7035         foreach my $pr (@list) {
7036                 my %proj = %$pr;
7037                 my $head = git_get_head_hash($proj{'path'});
7038                 if (!defined $head) {
7039                         next;
7040                 }
7041                 $git_dir = "$projectroot/$proj{'path'}";
7042                 my %co = parse_commit($head);
7043                 if (!%co) {
7044                         next;
7045                 }
7046
7047                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7048                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7049                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7050                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7051         }
7052         print <<XML;
7053 </outline>
7054 </body>
7055 </opml>
7056 XML
7057 }