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