Lady’s Gitweb - Gitweb/blob - 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 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # Path to the highlight executable to use (must be the one from
 169 # http://www.andre-simon.de due to assumptions about parameters and output).
 170 # Useful if highlight is not installed on your webserver's PATH.
 171 # [Default: highlight]
 172 our $highlight_bin = "++HIGHLIGHT_BIN++";
 173
 174 # information about snapshot formats that gitweb is capable of serving
 175 our %known_snapshot_formats = (
 176         # name => {
 177         #       'display' => display name,
 178         #       'type' => mime type,
 179         #       'suffix' => filename suffix,
 180         #       'format' => --format for git-archive,
 181         #       'compressor' => [compressor command and arguments]
 182         #                       (array reference, optional)
 183         #       'disabled' => boolean (optional)}
 184         #
 185         'tgz' => {
 186                 'display' => 'tar.gz',
 187                 'type' => 'application/x-gzip',
 188                 'suffix' => '.tar.gz',
 189                 'format' => 'tar',
 190                 'compressor' => ['gzip']},
 191
 192         'tbz2' => {
 193                 'display' => 'tar.bz2',
 194                 'type' => 'application/x-bzip2',
 195                 'suffix' => '.tar.bz2',
 196                 'format' => 'tar',
 197                 'compressor' => ['bzip2']},
 198
 199         'txz' => {
 200                 'display' => 'tar.xz',
 201                 'type' => 'application/x-xz',
 202                 'suffix' => '.tar.xz',
 203                 'format' => 'tar',
 204                 'compressor' => ['xz'],
 205                 'disabled' => 1},
 206
 207         'zip' => {
 208                 'display' => 'zip',
 209                 'type' => 'application/x-zip',
 210                 'suffix' => '.zip',
 211                 'format' => 'zip'},
 212 );
 213
 214 # Aliases so we understand old gitweb.snapshot values in repository
 215 # configuration.
 216 our %known_snapshot_format_aliases = (
 217         'gzip'  => 'tgz',
 218         'bzip2' => 'tbz2',
 219         'xz'    => 'txz',
 220
 221         # backward compatibility: legacy gitweb config support
 222         'x-gzip' => undef, 'gz' => undef,
 223         'x-bzip2' => undef, 'bz2' => undef,
 224         'x-zip' => undef, '' => undef,
 225 );
 226
 227 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 228 # are changed, it may be appropriate to change these values too via
 229 # $GITWEB_CONFIG.
 230 our %avatar_size = (
 231         'default' => 16,
 232         'double'  => 32
 233 );
 234
 235 # Used to set the maximum load that we will still respond to gitweb queries.
 236 # If server load exceed this value then return "503 server busy" error.
 237 # If gitweb cannot determined server load, it is taken to be 0.
 238 # Leave it undefined (or set to 'undef') to turn off load checking.
 239 our $maxload = 300;
 240
 241 # configuration for 'highlight' (http://www.andre-simon.de/)
 242 # match by basename
 243 our %highlight_basename = (
 244         #'Program' => 'py',
 245         #'Library' => 'py',
 246         'SConstruct' => 'py', # SCons equivalent of Makefile
 247         'Makefile' => 'make',
 248 );
 249 # match by extension
 250 our %highlight_ext = (
 251         # main extensions, defining name of syntax;
 252         # see files in /usr/share/highlight/langDefs/ directory
 253         map { $_ => $_ }
 254                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'sh'  } qw(bash zsh ksh),
 258         map { $_ => 'cpp' } qw(cxx c++ cc),
 259         map { $_ => 'php' } qw(php3 php4 php5 phps),
 260         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 261         map { $_ => 'make'} qw(mak mk),
 262         map { $_ => 'xml' } qw(xhtml html htm),
 263 );
 264
 265 # You define site-wide feature defaults here; override them with
 266 # $GITWEB_CONFIG as necessary.
 267 our %feature = (
 268         # feature => {
 269         #       'sub' => feature-sub (subroutine),
 270         #       'override' => allow-override (boolean),
 271         #       'default' => [ default options...] (array reference)}
 272         #
 273         # if feature is overridable (it means that allow-override has true value),
 274         # then feature-sub will be called with default options as parameters;
 275         # return value of feature-sub indicates if to enable specified feature
 276         #
 277         # if there is no 'sub' key (no feature-sub), then feature cannot be
 278         # overridden
 279         #
 280         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 281         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 282         # is enabled
 283
 284         # Enable the 'blame' blob view, showing the last commit that modified
 285         # each line in the file. This can be very CPU-intensive.
 286
 287         # To enable system wide have in $GITWEB_CONFIG
 288         # $feature{'blame'}{'default'} = [1];
 289         # To have project specific config enable override in $GITWEB_CONFIG
 290         # $feature{'blame'}{'override'} = 1;
 291         # and in project config gitweb.blame = 0|1;
 292         'blame' => {
 293                 'sub' => sub { feature_bool('blame', @_) },
 294                 'override' => 0,
 295                 'default' => [0]},
 296
 297         # Enable the 'snapshot' link, providing a compressed archive of any
 298         # tree. This can potentially generate high traffic if you have large
 299         # project.
 300
 301         # Value is a list of formats defined in %known_snapshot_formats that
 302         # you wish to offer.
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'snapshot'}{'default'} = [];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'snapshot'}{'override'} = 1;
 307         # and in project config, a comma-separated list of formats or "none"
 308         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 309         'snapshot' => {
 310                 'sub' => \&feature_snapshot,
 311                 'override' => 0,
 312                 'default' => ['tgz']},
 313
 314         # Enable text search, which will list the commits which match author,
 315         # committer or commit text to a given string.  Enabled by default.
 316         # Project specific override is not supported.
 317         'search' => {
 318                 'override' => 0,
 319                 'default' => [1]},
 320
 321         # Enable grep search, which will list the files in currently selected
 322         # tree containing the given string. Enabled by default. This can be
 323         # potentially CPU-intensive, of course.
 324
 325         # To enable system wide have in $GITWEB_CONFIG
 326         # $feature{'grep'}{'default'} = [1];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'grep'}{'override'} = 1;
 329         # and in project config gitweb.grep = 0|1;
 330         'grep' => {
 331                 'sub' => sub { feature_bool('grep', @_) },
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable the pickaxe search, which will list the commits that modified
 336         # a given string in a file. This can be practical and quite faster
 337         # alternative to 'blame', but still potentially CPU-intensive.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pickaxe'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'pickaxe'}{'override'} = 1;
 343         # and in project config gitweb.pickaxe = 0|1;
 344         'pickaxe' => {
 345                 'sub' => sub { feature_bool('pickaxe', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable showing size of blobs in a 'tree' view, in a separate
 350         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 351
 352         # To disable system wide have in $GITWEB_CONFIG
 353         # $feature{'show-sizes'}{'default'} = [0];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'show-sizes'}{'override'} = 1;
 356         # and in project config gitweb.showsizes = 0|1;
 357         'show-sizes' => {
 358                 'sub' => sub { feature_bool('showsizes', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Make gitweb use an alternative format of the URLs which can be
 363         # more readable and natural-looking: project name is embedded
 364         # directly in the path and the query string contains other
 365         # auxiliary information. All gitweb installations recognize
 366         # URL in either format; this configures in which formats gitweb
 367         # generates links.
 368
 369         # To enable system wide have in $GITWEB_CONFIG
 370         # $feature{'pathinfo'}{'default'} = [1];
 371         # Project specific override is not supported.
 372
 373         # Note that you will need to change the default location of CSS,
 374         # favicon, logo and possibly other files to an absolute URL. Also,
 375         # if gitweb.cgi serves as your indexfile, you will need to force
 376         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 377         'pathinfo' => {
 378                 'override' => 0,
 379                 'default' => [0]},
 380
 381         # Make gitweb consider projects in project root subdirectories
 382         # to be forks of existing projects. Given project $projname.git,
 383         # projects matching $projname/*.git will not be shown in the main
 384         # projects list, instead a '+' mark will be added to $projname
 385         # there and a 'forks' view will be enabled for the project, listing
 386         # all the forks. If project list is taken from a file, forks have
 387         # to be listed after the main project.
 388
 389         # To enable system wide have in $GITWEB_CONFIG
 390         # $feature{'forks'}{'default'} = [1];
 391         # Project specific override is not supported.
 392         'forks' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Insert custom links to the action bar of all project pages.
 397         # This enables you mainly to link to third-party scripts integrating
 398         # into gitweb; e.g. git-browser for graphical history representation
 399         # or custom web-based repository administration interface.
 400
 401         # The 'default' value consists of a list of triplets in the form
 402         # (label, link, position) where position is the label after which
 403         # to insert the link and link is a format string where %n expands
 404         # to the project name, %f to the project path within the filesystem,
 405         # %h to the current hash (h gitweb parameter) and %b to the current
 406         # hash base (hb gitweb parameter); %% expands to %.
 407
 408         # To enable system wide have in $GITWEB_CONFIG e.g.
 409         # $feature{'actions'}{'default'} = [('graphiclog',
 410         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 411         # Project specific override is not supported.
 412         'actions' => {
 413                 'override' => 0,
 414                 'default' => []},
 415
 416         # Allow gitweb scan project content tags described in ctags/
 417         # of project repository, and display the popular Web 2.0-ish
 418         # "tag cloud" near the project list. Note that this is something
 419         # COMPLETELY different from the normal Git tags.
 420
 421         # gitweb by itself can show existing tags, but it does not handle
 422         # tagging itself; you need an external application for that.
 423         # For an example script, check Girocco's cgi/tagproj.cgi.
 424         # You may want to install the HTML::TagCloud Perl module to get
 425         # a pretty tag cloud instead of just a list of tags.
 426
 427         # To enable system wide have in $GITWEB_CONFIG
 428         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 429         # Project specific override is not supported.
 430         'ctags' => {
 431                 'override' => 0,
 432                 'default' => [0]},
 433
 434         # The maximum number of patches in a patchset generated in patch
 435         # view. Set this to 0 or undef to disable patch view, or to a
 436         # negative number to remove any limit.
 437
 438         # To disable system wide have in $GITWEB_CONFIG
 439         # $feature{'patches'}{'default'} = [0];
 440         # To have project specific config enable override in $GITWEB_CONFIG
 441         # $feature{'patches'}{'override'} = 1;
 442         # and in project config gitweb.patches = 0|n;
 443         # where n is the maximum number of patches allowed in a patchset.
 444         'patches' => {
 445                 'sub' => \&feature_patches,
 446                 'override' => 0,
 447                 'default' => [16]},
 448
 449         # Avatar support. When this feature is enabled, views such as
 450         # shortlog or commit will display an avatar associated with
 451         # the email of the committer(s) and/or author(s).
 452
 453         # Currently available providers are gravatar and picon.
 454         # If an unknown provider is specified, the feature is disabled.
 455
 456         # Gravatar depends on Digest::MD5.
 457         # Picon currently relies on the indiana.edu database.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'avatar'}{'default'} = ['<provider>'];
 461         # where <provider> is either gravatar or picon.
 462         # To have project specific config enable override in $GITWEB_CONFIG
 463         # $feature{'avatar'}{'override'} = 1;
 464         # and in project config gitweb.avatar = <provider>;
 465         'avatar' => {
 466                 'sub' => \&feature_avatar,
 467                 'override' => 0,
 468                 'default' => ['']},
 469
 470         # Enable displaying how much time and how many git commands
 471         # it took to generate and display page.  Disabled by default.
 472         # Project specific override is not supported.
 473         'timed' => {
 474                 'override' => 0,
 475                 'default' => [0]},
 476
 477         # Enable turning some links into links to actions which require
 478         # JavaScript to run (like 'blame_incremental').  Not enabled by
 479         # default.  Project specific override is currently not supported.
 480         'javascript-actions' => {
 481                 'override' => 0,
 482                 'default' => [0]},
 483
 484         # Syntax highlighting support. This is based on Daniel Svensson's
 485         # and Sham Chukoury's work in gitweb-xmms2.git.
 486         # It requires the 'highlight' program present in $PATH,
 487         # and therefore is disabled by default.
 488
 489         # To enable system wide have in $GITWEB_CONFIG
 490         # $feature{'highlight'}{'default'} = [1];
 491
 492         'highlight' => {
 493                 'sub' => sub { feature_bool('highlight', @_) },
 494                 'override' => 0,
 495                 'default' => [0]},
 496
 497         # Enable displaying of remote heads in the heads list
 498
 499         # To enable system wide have in $GITWEB_CONFIG
 500         # $feature{'remote_heads'}{'default'} = [1];
 501         # To have project specific config enable override in $GITWEB_CONFIG
 502         # $feature{'remote_heads'}{'override'} = 1;
 503         # and in project config gitweb.remote_heads = 0|1;
 504         'remote_heads' => {
 505                 'sub' => sub { feature_bool('remote_heads', @_) },
 506                 'override' => 0,
 507                 'default' => [0]},
 508 );
 509
 510 sub gitweb_get_feature {
 511         my ($name) = @_;
 512         return unless exists $feature{$name};
 513         my ($sub, $override, @defaults) = (
 514                 $feature{$name}{'sub'},
 515                 $feature{$name}{'override'},
 516                 @{$feature{$name}{'default'}});
 517         # project specific override is possible only if we have project
 518         our $git_dir; # global variable, declared later
 519         if (!$override || !defined $git_dir) {
 520                 return @defaults;
 521         }
 522         if (!defined $sub) {
 523                 warn "feature $name is not overridable";
 524                 return @defaults;
 525         }
 526         return $sub->(@defaults);
 527 }
 528
 529 # A wrapper to check if a given feature is enabled.
 530 # With this, you can say
 531 #
 532 #   my $bool_feat = gitweb_check_feature('bool_feat');
 533 #   gitweb_check_feature('bool_feat') or somecode;
 534 #
 535 # instead of
 536 #
 537 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 538 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 539 #
 540 sub gitweb_check_feature {
 541         return (gitweb_get_feature(@_))[0];
 542 }
 543
 544
 545 sub feature_bool {
 546         my $key = shift;
 547         my ($val) = git_get_project_config($key, '--bool');
 548
 549         if (!defined $val) {
 550                 return ($_[0]);
 551         } elsif ($val eq 'true') {
 552                 return (1);
 553         } elsif ($val eq 'false') {
 554                 return (0);
 555         }
 556 }
 557
 558 sub feature_snapshot {
 559         my (@fmts) = @_;
 560
 561         my ($val) = git_get_project_config('snapshot');
 562
 563         if ($val) {
 564                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 565         }
 566
 567         return @fmts;
 568 }
 569
 570 sub feature_patches {
 571         my @val = (git_get_project_config('patches', '--int'));
 572
 573         if (@val) {
 574                 return @val;
 575         }
 576
 577         return ($_[0]);
 578 }
 579
 580 sub feature_avatar {
 581         my @val = (git_get_project_config('avatar'));
 582
 583         return @val ? @val : @_;
 584 }
 585
 586 # checking HEAD file with -e is fragile if the repository was
 587 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 588 # and then pruned.
 589 sub check_head_link {
 590         my ($dir) = @_;
 591         my $headfile = "$dir/HEAD";
 592         return ((-e $headfile) ||
 593                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 594 }
 595
 596 sub check_export_ok {
 597         my ($dir) = @_;
 598         return (check_head_link($dir) &&
 599                 (!$export_ok || -e "$dir/$export_ok") &&
 600                 (!$export_auth_hook || $export_auth_hook->($dir)));
 601 }
 602
 603 # process alternate names for backward compatibility
 604 # filter out unsupported (unknown) snapshot formats
 605 sub filter_snapshot_fmts {
 606         my @fmts = @_;
 607
 608         @fmts = map {
 609                 exists $known_snapshot_format_aliases{$_} ?
 610                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 611         @fmts = grep {
 612                 exists $known_snapshot_formats{$_} &&
 613                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 614 }
 615
 616 # If it is set to code reference, it is code that it is to be run once per
 617 # request, allowing updating configurations that change with each request,
 618 # while running other code in config file only once.
 619 #
 620 # Otherwise, if it is false then gitweb would process config file only once;
 621 # if it is true then gitweb config would be run for each request.
 622 our $per_request_config = 1;
 623
 624 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 625 sub evaluate_gitweb_config {
 626         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 627         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 628         # die if there are errors parsing config file
 629         if (-e $GITWEB_CONFIG) {
 630                 do $GITWEB_CONFIG;
 631                 die $@ if $@;
 632         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 633                 do $GITWEB_CONFIG_SYSTEM;
 634                 die $@ if $@;
 635         }
 636 }
 637
 638 # Get loadavg of system, to compare against $maxload.
 639 # Currently it requires '/proc/loadavg' present to get loadavg;
 640 # if it is not present it returns 0, which means no load checking.
 641 sub get_loadavg {
 642         if( -e '/proc/loadavg' ){
 643                 open my $fd, '<', '/proc/loadavg'
 644                         or return 0;
 645                 my @load = split(/\s+/, scalar <$fd>);
 646                 close $fd;
 647
 648                 # The first three columns measure CPU and IO utilization of the last one,
 649                 # five, and 10 minute periods.  The fourth column shows the number of
 650                 # currently running processes and the total number of processes in the m/n
 651                 # format.  The last column displays the last process ID used.
 652                 return $load[0] || 0;
 653         }
 654         # additional checks for load average should go here for things that don't export
 655         # /proc/loadavg
 656
 657         return 0;
 658 }
 659
 660 # version of the core git binary
 661 our $git_version;
 662 sub evaluate_git_version {
 663         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 664         $number_of_git_cmds++;
 665 }
 666
 667 sub check_loadavg {
 668         if (defined $maxload && get_loadavg() > $maxload) {
 669                 die_error(503, "The load average on the server is too high");
 670         }
 671 }
 672
 673 # ======================================================================
 674 # input validation and dispatch
 675
 676 # input parameters can be collected from a variety of sources (presently, CGI
 677 # and PATH_INFO), so we define an %input_params hash that collects them all
 678 # together during validation: this allows subsequent uses (e.g. href()) to be
 679 # agnostic of the parameter origin
 680
 681 our %input_params = ();
 682
 683 # input parameters are stored with the long parameter name as key. This will
 684 # also be used in the href subroutine to convert parameters to their CGI
 685 # equivalent, and since the href() usage is the most frequent one, we store
 686 # the name -> CGI key mapping here, instead of the reverse.
 687 #
 688 # XXX: Warning: If you touch this, check the search form for updating,
 689 # too.
 690
 691 our @cgi_param_mapping = (
 692         project => "p",
 693         action => "a",
 694         file_name => "f",
 695         file_parent => "fp",
 696         hash => "h",
 697         hash_parent => "hp",
 698         hash_base => "hb",
 699         hash_parent_base => "hpb",
 700         page => "pg",
 701         order => "o",
 702         searchtext => "s",
 703         searchtype => "st",
 704         snapshot_format => "sf",
 705         extra_options => "opt",
 706         search_use_regexp => "sr",
 707         # this must be last entry (for manipulation from JavaScript)
 708         javascript => "js"
 709 );
 710 our %cgi_param_mapping = @cgi_param_mapping;
 711
 712 # we will also need to know the possible actions, for validation
 713 our %actions = (
 714         "blame" => \&git_blame,
 715         "blame_incremental" => \&git_blame_incremental,
 716         "blame_data" => \&git_blame_data,
 717         "blobdiff" => \&git_blobdiff,
 718         "blobdiff_plain" => \&git_blobdiff_plain,
 719         "blob" => \&git_blob,
 720         "blob_plain" => \&git_blob_plain,
 721         "commitdiff" => \&git_commitdiff,
 722         "commitdiff_plain" => \&git_commitdiff_plain,
 723         "commit" => \&git_commit,
 724         "forks" => \&git_forks,
 725         "heads" => \&git_heads,
 726         "history" => \&git_history,
 727         "log" => \&git_log,
 728         "patch" => \&git_patch,
 729         "patches" => \&git_patches,
 730         "remotes" => \&git_remotes,
 731         "rss" => \&git_rss,
 732         "atom" => \&git_atom,
 733         "search" => \&git_search,
 734         "search_help" => \&git_search_help,
 735         "shortlog" => \&git_shortlog,
 736         "summary" => \&git_summary,
 737         "tag" => \&git_tag,
 738         "tags" => \&git_tags,
 739         "tree" => \&git_tree,
 740         "snapshot" => \&git_snapshot,
 741         "object" => \&git_object,
 742         # those below don't need $project
 743         "opml" => \&git_opml,
 744         "project_list" => \&git_project_list,
 745         "project_index" => \&git_project_index,
 746 );
 747
 748 # finally, we have the hash of allowed extra_options for the commands that
 749 # allow them
 750 our %allowed_options = (
 751         "--no-merges" => [ qw(rss atom log shortlog history) ],
 752 );
 753
 754 # fill %input_params with the CGI parameters. All values except for 'opt'
 755 # should be single values, but opt can be an array. We should probably
 756 # build an array of parameters that can be multi-valued, but since for the time
 757 # being it's only this one, we just single it out
 758 sub evaluate_query_params {
 759         our $cgi;
 760
 761         while (my ($name, $symbol) = each %cgi_param_mapping) {
 762                 if ($symbol eq 'opt') {
 763                         $input_params{$name} = [ $cgi->param($symbol) ];
 764                 } else {
 765                         $input_params{$name} = $cgi->param($symbol);
 766                 }
 767         }
 768 }
 769
 770 # now read PATH_INFO and update the parameter list for missing parameters
 771 sub evaluate_path_info {
 772         return if defined $input_params{'project'};
 773         return if !$path_info;
 774         $path_info =~ s,^/+,,;
 775         return if !$path_info;
 776
 777         # find which part of PATH_INFO is project
 778         my $project = $path_info;
 779         $project =~ s,/+$,,;
 780         while ($project && !check_head_link("$projectroot/$project")) {
 781                 $project =~ s,/*[^/]*$,,;
 782         }
 783         return unless $project;
 784         $input_params{'project'} = $project;
 785
 786         # do not change any parameters if an action is given using the query string
 787         return if $input_params{'action'};
 788         $path_info =~ s,^\Q$project\E/*,,;
 789
 790         # next, check if we have an action
 791         my $action = $path_info;
 792         $action =~ s,/.*$,,;
 793         if (exists $actions{$action}) {
 794                 $path_info =~ s,^$action/*,,;
 795                 $input_params{'action'} = $action;
 796         }
 797
 798         # list of actions that want hash_base instead of hash, but can have no
 799         # pathname (f) parameter
 800         my @wants_base = (
 801                 'tree',
 802                 'history',
 803         );
 804
 805         # we want to catch, among others
 806         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 807         my ($parentrefname, $parentpathname, $refname, $pathname) =
 808                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 809
 810         # first, analyze the 'current' part
 811         if (defined $pathname) {
 812                 # we got "branch:filename" or "branch:dir/"
 813                 # we could use git_get_type(branch:pathname), but:
 814                 # - it needs $git_dir
 815                 # - it does a git() call
 816                 # - the convention of terminating directories with a slash
 817                 #   makes it superfluous
 818                 # - embedding the action in the PATH_INFO would make it even
 819                 #   more superfluous
 820                 $pathname =~ s,^/+,,;
 821                 if (!$pathname || substr($pathname, -1) eq "/") {
 822                         $input_params{'action'} ||= "tree";
 823                         $pathname =~ s,/$,,;
 824                 } else {
 825                         # the default action depends on whether we had parent info
 826                         # or not
 827                         if ($parentrefname) {
 828                                 $input_params{'action'} ||= "blobdiff_plain";
 829                         } else {
 830                                 $input_params{'action'} ||= "blob_plain";
 831                         }
 832                 }
 833                 $input_params{'hash_base'} ||= $refname;
 834                 $input_params{'file_name'} ||= $pathname;
 835         } elsif (defined $refname) {
 836                 # we got "branch". In this case we have to choose if we have to
 837                 # set hash or hash_base.
 838                 #
 839                 # Most of the actions without a pathname only want hash to be
 840                 # set, except for the ones specified in @wants_base that want
 841                 # hash_base instead. It should also be noted that hand-crafted
 842                 # links having 'history' as an action and no pathname or hash
 843                 # set will fail, but that happens regardless of PATH_INFO.
 844                 if (defined $parentrefname) {
 845                         # if there is parent let the default be 'shortlog' action
 846                         # (for http://git.example.com/repo.git/A..B links); if there
 847                         # is no parent, dispatch will detect type of object and set
 848                         # action appropriately if required (if action is not set)
 849                         $input_params{'action'} ||= "shortlog";
 850                 }
 851                 if ($input_params{'action'} &&
 852                     grep { $_ eq $input_params{'action'} } @wants_base) {
 853                         $input_params{'hash_base'} ||= $refname;
 854                 } else {
 855                         $input_params{'hash'} ||= $refname;
 856                 }
 857         }
 858
 859         # next, handle the 'parent' part, if present
 860         if (defined $parentrefname) {
 861                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 862                 # someproject/blobdiff/oldrev..newrev:/filename
 863                 if ($parentpathname) {
 864                         $parentpathname =~ s,^/+,,;
 865                         $parentpathname =~ s,/$,,;
 866                         $input_params{'file_parent'} ||= $parentpathname;
 867                 } else {
 868                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 869                 }
 870                 # we assume that hash_parent_base is wanted if a path was specified,
 871                 # or if the action wants hash_base instead of hash
 872                 if (defined $input_params{'file_parent'} ||
 873                         grep { $_ eq $input_params{'action'} } @wants_base) {
 874                         $input_params{'hash_parent_base'} ||= $parentrefname;
 875                 } else {
 876                         $input_params{'hash_parent'} ||= $parentrefname;
 877                 }
 878         }
 879
 880         # for the snapshot action, we allow URLs in the form
 881         # $project/snapshot/$hash.ext
 882         # where .ext determines the snapshot and gets removed from the
 883         # passed $refname to provide the $hash.
 884         #
 885         # To be able to tell that $refname includes the format extension, we
 886         # require the following two conditions to be satisfied:
 887         # - the hash input parameter MUST have been set from the $refname part
 888         #   of the URL (i.e. they must be equal)
 889         # - the snapshot format MUST NOT have been defined already (e.g. from
 890         #   CGI parameter sf)
 891         # It's also useless to try any matching unless $refname has a dot,
 892         # so we check for that too
 893         if (defined $input_params{'action'} &&
 894                 $input_params{'action'} eq 'snapshot' &&
 895                 defined $refname && index($refname, '.') != -1 &&
 896                 $refname eq $input_params{'hash'} &&
 897                 !defined $input_params{'snapshot_format'}) {
 898                 # We loop over the known snapshot formats, checking for
 899                 # extensions. Allowed extensions are both the defined suffix
 900                 # (which includes the initial dot already) and the snapshot
 901                 # format key itself, with a prepended dot
 902                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 903                         my $hash = $refname;
 904                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 905                                 next;
 906                         }
 907                         my $sfx = $1;
 908                         # a valid suffix was found, so set the snapshot format
 909                         # and reset the hash parameter
 910                         $input_params{'snapshot_format'} = $fmt;
 911                         $input_params{'hash'} = $hash;
 912                         # we also set the format suffix to the one requested
 913                         # in the URL: this way a request for e.g. .tgz returns
 914                         # a .tgz instead of a .tar.gz
 915                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 916                         last;
 917                 }
 918         }
 919 }
 920
 921 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 922      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 923      $searchtext, $search_regexp);
 924 sub evaluate_and_validate_params {
 925         our $action = $input_params{'action'};
 926         if (defined $action) {
 927                 if (!validate_action($action)) {
 928                         die_error(400, "Invalid action parameter");
 929                 }
 930         }
 931
 932         # parameters which are pathnames
 933         our $project = $input_params{'project'};
 934         if (defined $project) {
 935                 if (!validate_project($project)) {
 936                         undef $project;
 937                         die_error(404, "No such project");
 938                 }
 939         }
 940
 941         our $file_name = $input_params{'file_name'};
 942         if (defined $file_name) {
 943                 if (!validate_pathname($file_name)) {
 944                         die_error(400, "Invalid file parameter");
 945                 }
 946         }
 947
 948         our $file_parent = $input_params{'file_parent'};
 949         if (defined $file_parent) {
 950                 if (!validate_pathname($file_parent)) {
 951                         die_error(400, "Invalid file parent parameter");
 952                 }
 953         }
 954
 955         # parameters which are refnames
 956         our $hash = $input_params{'hash'};
 957         if (defined $hash) {
 958                 if (!validate_refname($hash)) {
 959                         die_error(400, "Invalid hash parameter");
 960                 }
 961         }
 962
 963         our $hash_parent = $input_params{'hash_parent'};
 964         if (defined $hash_parent) {
 965                 if (!validate_refname($hash_parent)) {
 966                         die_error(400, "Invalid hash parent parameter");
 967                 }
 968         }
 969
 970         our $hash_base = $input_params{'hash_base'};
 971         if (defined $hash_base) {
 972                 if (!validate_refname($hash_base)) {
 973                         die_error(400, "Invalid hash base parameter");
 974                 }
 975         }
 976
 977         our @extra_options = @{$input_params{'extra_options'}};
 978         # @extra_options is always defined, since it can only be (currently) set from
 979         # CGI, and $cgi->param() returns the empty array in array context if the param
 980         # is not set
 981         foreach my $opt (@extra_options) {
 982                 if (not exists $allowed_options{$opt}) {
 983                         die_error(400, "Invalid option parameter");
 984                 }
 985                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 986                         die_error(400, "Invalid option parameter for this action");
 987                 }
 988         }
 989
 990         our $hash_parent_base = $input_params{'hash_parent_base'};
 991         if (defined $hash_parent_base) {
 992                 if (!validate_refname($hash_parent_base)) {
 993                         die_error(400, "Invalid hash parent base parameter");
 994                 }
 995         }
 996
 997         # other parameters
 998         our $page = $input_params{'page'};
 999         if (defined $page) {
1000                 if ($page =~ m/[^0-9]/) {
1001                         die_error(400, "Invalid page parameter");
1002                 }
1003         }
1004
1005         our $searchtype = $input_params{'searchtype'};
1006         if (defined $searchtype) {
1007                 if ($searchtype =~ m/[^a-z]/) {
1008                         die_error(400, "Invalid searchtype parameter");
1009                 }
1010         }
1011
1012         our $search_use_regexp = $input_params{'search_use_regexp'};
1013
1014         our $searchtext = $input_params{'searchtext'};
1015         our $search_regexp;
1016         if (defined $searchtext) {
1017                 if (length($searchtext) < 2) {
1018                         die_error(403, "At least two characters are required for search parameter");
1019                 }
1020                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1021         }
1022 }
1023
1024 # path to the current git repository
1025 our $git_dir;
1026 sub evaluate_git_dir {
1027         our $git_dir = "$projectroot/$project" if $project;
1028 }
1029
1030 our (@snapshot_fmts, $git_avatar);
1031 sub configure_gitweb_features {
1032         # list of supported snapshot formats
1033         our @snapshot_fmts = gitweb_get_feature('snapshot');
1034         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1035
1036         # check that the avatar feature is set to a known provider name,
1037         # and for each provider check if the dependencies are satisfied.
1038         # if the provider name is invalid or the dependencies are not met,
1039         # reset $git_avatar to the empty string.
1040         our ($git_avatar) = gitweb_get_feature('avatar');
1041         if ($git_avatar eq 'gravatar') {
1042                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1043         } elsif ($git_avatar eq 'picon') {
1044                 # no dependencies
1045         } else {
1046                 $git_avatar = '';
1047         }
1048 }
1049
1050 # custom error handler: 'die <message>' is Internal Server Error
1051 sub handle_errors_html {
1052         my $msg = shift; # it is already HTML escaped
1053
1054         # to avoid infinite loop where error occurs in die_error,
1055         # change handler to default handler, disabling handle_errors_html
1056         set_message("Error occured when inside die_error:\n$msg");
1057
1058         # you cannot jump out of die_error when called as error handler;
1059         # the subroutine set via CGI::Carp::set_message is called _after_
1060         # HTTP headers are already written, so it cannot write them itself
1061         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1062 }
1063 set_message(\&handle_errors_html);
1064
1065 # dispatch
1066 sub dispatch {
1067         if (!defined $action) {
1068                 if (defined $hash) {
1069                         $action = git_get_type($hash);
1070                 } elsif (defined $hash_base && defined $file_name) {
1071                         $action = git_get_type("$hash_base:$file_name");
1072                 } elsif (defined $project) {
1073                         $action = 'summary';
1074                 } else {
1075                         $action = 'project_list';
1076                 }
1077         }
1078         if (!defined($actions{$action})) {
1079                 die_error(400, "Unknown action");
1080         }
1081         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1082             !$project) {
1083                 die_error(400, "Project needed");
1084         }
1085         $actions{$action}->();
1086 }
1087
1088 sub reset_timer {
1089         our $t0 = [ gettimeofday() ]
1090                 if defined $t0;
1091         our $number_of_git_cmds = 0;
1092 }
1093
1094 our $first_request = 1;
1095 sub run_request {
1096         reset_timer();
1097
1098         evaluate_uri();
1099         if ($first_request) {
1100                 evaluate_gitweb_config();
1101                 evaluate_git_version();
1102         }
1103         if ($per_request_config) {
1104                 if (ref($per_request_config) eq 'CODE') {
1105                         $per_request_config->();
1106                 } elsif (!$first_request) {
1107                         evaluate_gitweb_config();
1108                 }
1109         }
1110         check_loadavg();
1111
1112         # $projectroot and $projects_list might be set in gitweb config file
1113         $projects_list ||= $projectroot;
1114
1115         evaluate_query_params();
1116         evaluate_path_info();
1117         evaluate_and_validate_params();
1118         evaluate_git_dir();
1119
1120         configure_gitweb_features();
1121
1122         dispatch();
1123 }
1124
1125 our $is_last_request = sub { 1 };
1126 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1127 our $CGI = 'CGI';
1128 our $cgi;
1129 sub configure_as_fcgi {
1130         require CGI::Fast;
1131         our $CGI = 'CGI::Fast';
1132
1133         my $request_number = 0;
1134         # let each child service 100 requests
1135         our $is_last_request = sub { ++$request_number > 100 };
1136 }
1137 sub evaluate_argv {
1138         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1139         configure_as_fcgi()
1140                 if $script_name =~ /\.fcgi$/;
1141
1142         return unless (@ARGV);
1143
1144         require Getopt::Long;
1145         Getopt::Long::GetOptions(
1146                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1147                 'nproc|n=i' => sub {
1148                         my ($arg, $val) = @_;
1149                         return unless eval { require FCGI::ProcManager; 1; };
1150                         my $proc_manager = FCGI::ProcManager->new({
1151                                 n_processes => $val,
1152                         });
1153                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1154                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1155                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1156                 },
1157         );
1158 }
1159
1160 sub run {
1161         evaluate_argv();
1162
1163         $first_request = 1;
1164         $pre_listen_hook->()
1165                 if $pre_listen_hook;
1166
1167  REQUEST:
1168         while ($cgi = $CGI->new()) {
1169                 $pre_dispatch_hook->()
1170                         if $pre_dispatch_hook;
1171
1172                 run_request();
1173
1174                 $post_dispatch_hook->()
1175                         if $post_dispatch_hook;
1176                 $first_request = 0;
1177
1178                 last REQUEST if ($is_last_request->());
1179         }
1180
1181  DONE_GITWEB:
1182         1;
1183 }
1184
1185 run();
1186
1187 if (defined caller) {
1188         # wrapped in a subroutine processing requests,
1189         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1190         return;
1191 } else {
1192         # pure CGI script, serving single request
1193         exit;
1194 }
1195
1196 ## ======================================================================
1197 ## action links
1198
1199 # possible values of extra options
1200 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1201 # -replay => 1      - start from a current view (replay with modifications)
1202 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1203 sub href {
1204         my %params = @_;
1205         # default is to use -absolute url() i.e. $my_uri
1206         my $href = $params{-full} ? $my_url : $my_uri;
1207
1208         $params{'project'} = $project unless exists $params{'project'};
1209
1210         if ($params{-replay}) {
1211                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1212                         if (!exists $params{$name}) {
1213                                 $params{$name} = $input_params{$name};
1214                         }
1215                 }
1216         }
1217
1218         my $use_pathinfo = gitweb_check_feature('pathinfo');
1219         if (defined $params{'project'} &&
1220             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1221                 # try to put as many parameters as possible in PATH_INFO:
1222                 #   - project name
1223                 #   - action
1224                 #   - hash_parent or hash_parent_base:/file_parent
1225                 #   - hash or hash_base:/filename
1226                 #   - the snapshot_format as an appropriate suffix
1227
1228                 # When the script is the root DirectoryIndex for the domain,
1229                 # $href here would be something like http://gitweb.example.com/
1230                 # Thus, we strip any trailing / from $href, to spare us double
1231                 # slashes in the final URL
1232                 $href =~ s,/$,,;
1233
1234                 # Then add the project name, if present
1235                 $href .= "/".esc_path_info($params{'project'});
1236                 delete $params{'project'};
1237
1238                 # since we destructively absorb parameters, we keep this
1239                 # boolean that remembers if we're handling a snapshot
1240                 my $is_snapshot = $params{'action'} eq 'snapshot';
1241
1242                 # Summary just uses the project path URL, any other action is
1243                 # added to the URL
1244                 if (defined $params{'action'}) {
1245                         $href .= "/".esc_path_info($params{'action'})
1246                                 unless $params{'action'} eq 'summary';
1247                         delete $params{'action'};
1248                 }
1249
1250                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1251                 # stripping nonexistent or useless pieces
1252                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1253                         || $params{'hash_parent'} || $params{'hash'});
1254                 if (defined $params{'hash_base'}) {
1255                         if (defined $params{'hash_parent_base'}) {
1256                                 $href .= esc_path_info($params{'hash_parent_base'});
1257                                 # skip the file_parent if it's the same as the file_name
1258                                 if (defined $params{'file_parent'}) {
1259                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1260                                                 delete $params{'file_parent'};
1261                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1262                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1263                                                 delete $params{'file_parent'};
1264                                         }
1265                                 }
1266                                 $href .= "..";
1267                                 delete $params{'hash_parent'};
1268                                 delete $params{'hash_parent_base'};
1269                         } elsif (defined $params{'hash_parent'}) {
1270                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1271                                 delete $params{'hash_parent'};
1272                         }
1273
1274                         $href .= esc_path_info($params{'hash_base'});
1275                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1276                                 $href .= ":/".esc_path_info($params{'file_name'});
1277                                 delete $params{'file_name'};
1278                         }
1279                         delete $params{'hash'};
1280                         delete $params{'hash_base'};
1281                 } elsif (defined $params{'hash'}) {
1282                         $href .= esc_path_info($params{'hash'});
1283                         delete $params{'hash'};
1284                 }
1285
1286                 # If the action was a snapshot, we can absorb the
1287                 # snapshot_format parameter too
1288                 if ($is_snapshot) {
1289                         my $fmt = $params{'snapshot_format'};
1290                         # snapshot_format should always be defined when href()
1291                         # is called, but just in case some code forgets, we
1292                         # fall back to the default
1293                         $fmt ||= $snapshot_fmts[0];
1294                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1295                         delete $params{'snapshot_format'};
1296                 }
1297         }
1298
1299         # now encode the parameters explicitly
1300         my @result = ();
1301         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1302                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1303                 if (defined $params{$name}) {
1304                         if (ref($params{$name}) eq "ARRAY") {
1305                                 foreach my $par (@{$params{$name}}) {
1306                                         push @result, $symbol . "=" . esc_param($par);
1307                                 }
1308                         } else {
1309                                 push @result, $symbol . "=" . esc_param($params{$name});
1310                         }
1311                 }
1312         }
1313         $href .= "?" . join(';', @result) if scalar @result;
1314
1315         # final transformation: trailing spaces must be escaped (URI-encoded)
1316         $href =~ s/(\s+)$/CGI::escape($1)/e;
1317
1318         return $href;
1319 }
1320
1321
1322 ## ======================================================================
1323 ## validation, quoting/unquoting and escaping
1324
1325 sub validate_action {
1326         my $input = shift || return undef;
1327         return undef unless exists $actions{$input};
1328         return $input;
1329 }
1330
1331 sub validate_project {
1332         my $input = shift || return undef;
1333         if (!validate_pathname($input) ||
1334                 !(-d "$projectroot/$input") ||
1335                 !check_export_ok("$projectroot/$input") ||
1336                 ($strict_export && !project_in_list($input))) {
1337                 return undef;
1338         } else {
1339                 return $input;
1340         }
1341 }
1342
1343 sub validate_pathname {
1344         my $input = shift || return undef;
1345
1346         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1347         # at the beginning, at the end, and between slashes.
1348         # also this catches doubled slashes
1349         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1350                 return undef;
1351         }
1352         # no null characters
1353         if ($input =~ m!\0!) {
1354                 return undef;
1355         }
1356         return $input;
1357 }
1358
1359 sub validate_refname {
1360         my $input = shift || return undef;
1361
1362         # textual hashes are O.K.
1363         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1364                 return $input;
1365         }
1366         # it must be correct pathname
1367         $input = validate_pathname($input)
1368                 or return undef;
1369         # restrictions on ref name according to git-check-ref-format
1370         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1371                 return undef;
1372         }
1373         return $input;
1374 }
1375
1376 # decode sequences of octets in utf8 into Perl's internal form,
1377 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1378 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1379 sub to_utf8 {
1380         my $str = shift;
1381         return undef unless defined $str;
1382         if (utf8::valid($str)) {
1383                 utf8::decode($str);
1384                 return $str;
1385         } else {
1386                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1387         }
1388 }
1389
1390 # quote unsafe chars, but keep the slash, even when it's not
1391 # correct, but quoted slashes look too horrible in bookmarks
1392 sub esc_param {
1393         my $str = shift;
1394         return undef unless defined $str;
1395         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1396         $str =~ s/ /\+/g;
1397         return $str;
1398 }
1399
1400 # the quoting rules for path_info fragment are slightly different
1401 sub esc_path_info {
1402         my $str = shift;
1403         return undef unless defined $str;
1404
1405         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1406         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1407
1408         return $str;
1409 }
1410
1411 # quote unsafe chars in whole URL, so some characters cannot be quoted
1412 sub esc_url {
1413         my $str = shift;
1414         return undef unless defined $str;
1415         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1416         $str =~ s/ /\+/g;
1417         return $str;
1418 }
1419
1420 # quote unsafe characters in HTML attributes
1421 sub esc_attr {
1422
1423         # for XHTML conformance escaping '"' to '&quot;' is not enough
1424         return esc_html(@_);
1425 }
1426
1427 # replace invalid utf8 character with SUBSTITUTION sequence
1428 sub esc_html {
1429         my $str = shift;
1430         my %opts = @_;
1431
1432         return undef unless defined $str;
1433
1434         $str = to_utf8($str);
1435         $str = $cgi->escapeHTML($str);
1436         if ($opts{'-nbsp'}) {
1437                 $str =~ s/ /&nbsp;/g;
1438         }
1439         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1440         return $str;
1441 }
1442
1443 # quote control characters and escape filename to HTML
1444 sub esc_path {
1445         my $str = shift;
1446         my %opts = @_;
1447
1448         return undef unless defined $str;
1449
1450         $str = to_utf8($str);
1451         $str = $cgi->escapeHTML($str);
1452         if ($opts{'-nbsp'}) {
1453                 $str =~ s/ /&nbsp;/g;
1454         }
1455         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1456         return $str;
1457 }
1458
1459 # Make control characters "printable", using character escape codes (CEC)
1460 sub quot_cec {
1461         my $cntrl = shift;
1462         my %opts = @_;
1463         my %es = ( # character escape codes, aka escape sequences
1464                 "\t" => '\t',   # tab            (HT)
1465                 "\n" => '\n',   # line feed      (LF)
1466                 "\r" => '\r',   # carrige return (CR)
1467                 "\f" => '\f',   # form feed      (FF)
1468                 "\b" => '\b',   # backspace      (BS)
1469                 "\a" => '\a',   # alarm (bell)   (BEL)
1470                 "\e" => '\e',   # escape         (ESC)
1471                 "\013" => '\v', # vertical tab   (VT)
1472                 "\000" => '\0', # nul character  (NUL)
1473         );
1474         my $chr = ( (exists $es{$cntrl})
1475                     ? $es{$cntrl}
1476                     : sprintf('\%2x', ord($cntrl)) );
1477         if ($opts{-nohtml}) {
1478                 return $chr;
1479         } else {
1480                 return "<span class=\"cntrl\">$chr</span>";
1481         }
1482 }
1483
1484 # Alternatively use unicode control pictures codepoints,
1485 # Unicode "printable representation" (PR)
1486 sub quot_upr {
1487         my $cntrl = shift;
1488         my %opts = @_;
1489
1490         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1491         if ($opts{-nohtml}) {
1492                 return $chr;
1493         } else {
1494                 return "<span class=\"cntrl\">$chr</span>";
1495         }
1496 }
1497
1498 # git may return quoted and escaped filenames
1499 sub unquote {
1500         my $str = shift;
1501
1502         sub unq {
1503                 my $seq = shift;
1504                 my %es = ( # character escape codes, aka escape sequences
1505                         't' => "\t",   # tab            (HT, TAB)
1506                         'n' => "\n",   # newline        (NL)
1507                         'r' => "\r",   # return         (CR)
1508                         'f' => "\f",   # form feed      (FF)
1509                         'b' => "\b",   # backspace      (BS)
1510                         'a' => "\a",   # alarm (bell)   (BEL)
1511                         'e' => "\e",   # escape         (ESC)
1512                         'v' => "\013", # vertical tab   (VT)
1513                 );
1514
1515                 if ($seq =~ m/^[0-7]{1,3}$/) {
1516                         # octal char sequence
1517                         return chr(oct($seq));
1518                 } elsif (exists $es{$seq}) {
1519                         # C escape sequence, aka character escape code
1520                         return $es{$seq};
1521                 }
1522                 # quoted ordinary character
1523                 return $seq;
1524         }
1525
1526         if ($str =~ m/^"(.*)"$/) {
1527                 # needs unquoting
1528                 $str = $1;
1529                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1530         }
1531         return $str;
1532 }
1533
1534 # escape tabs (convert tabs to spaces)
1535 sub untabify {
1536         my $line = shift;
1537
1538         while ((my $pos = index($line, "\t")) != -1) {
1539                 if (my $count = (8 - ($pos % 8))) {
1540                         my $spaces = ' ' x $count;
1541                         $line =~ s/\t/$spaces/;
1542                 }
1543         }
1544
1545         return $line;
1546 }
1547
1548 sub project_in_list {
1549         my $project = shift;
1550         my @list = git_get_projects_list();
1551         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1552 }
1553
1554 ## ----------------------------------------------------------------------
1555 ## HTML aware string manipulation
1556
1557 # Try to chop given string on a word boundary between position
1558 # $len and $len+$add_len. If there is no word boundary there,
1559 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1560 # (marking chopped part) would be longer than given string.
1561 sub chop_str {
1562         my $str = shift;
1563         my $len = shift;
1564         my $add_len = shift || 10;
1565         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1566
1567         # Make sure perl knows it is utf8 encoded so we don't
1568         # cut in the middle of a utf8 multibyte char.
1569         $str = to_utf8($str);
1570
1571         # allow only $len chars, but don't cut a word if it would fit in $add_len
1572         # if it doesn't fit, cut it if it's still longer than the dots we would add
1573         # remove chopped character entities entirely
1574
1575         # when chopping in the middle, distribute $len into left and right part
1576         # return early if chopping wouldn't make string shorter
1577         if ($where eq 'center') {
1578                 return $str if ($len + 5 >= length($str)); # filler is length 5
1579                 $len = int($len/2);
1580         } else {
1581                 return $str if ($len + 4 >= length($str)); # filler is length 4
1582         }
1583
1584         # regexps: ending and beginning with word part up to $add_len
1585         my $endre = qr/.{$len}\w{0,$add_len}/;
1586         my $begre = qr/\w{0,$add_len}.{$len}/;
1587
1588         if ($where eq 'left') {
1589                 $str =~ m/^(.*?)($begre)$/;
1590                 my ($lead, $body) = ($1, $2);
1591                 if (length($lead) > 4) {
1592                         $lead = " ...";
1593                 }
1594                 return "$lead$body";
1595
1596         } elsif ($where eq 'center') {
1597                 $str =~ m/^($endre)(.*)$/;
1598                 my ($left, $str)  = ($1, $2);
1599                 $str =~ m/^(.*?)($begre)$/;
1600                 my ($mid, $right) = ($1, $2);
1601                 if (length($mid) > 5) {
1602                         $mid = " ... ";
1603                 }
1604                 return "$left$mid$right";
1605
1606         } else {
1607                 $str =~ m/^($endre)(.*)$/;
1608                 my $body = $1;
1609                 my $tail = $2;
1610                 if (length($tail) > 4) {
1611                         $tail = "... ";
1612                 }
1613                 return "$body$tail";
1614         }
1615 }
1616
1617 # takes the same arguments as chop_str, but also wraps a <span> around the
1618 # result with a title attribute if it does get chopped. Additionally, the
1619 # string is HTML-escaped.
1620 sub chop_and_escape_str {
1621         my ($str) = @_;
1622
1623         my $chopped = chop_str(@_);
1624         if ($chopped eq $str) {
1625                 return esc_html($chopped);
1626         } else {
1627                 $str =~ s/[[:cntrl:]]/?/g;
1628                 return $cgi->span({-title=>$str}, esc_html($chopped));
1629         }
1630 }
1631
1632 ## ----------------------------------------------------------------------
1633 ## functions returning short strings
1634
1635 # CSS class for given age value (in seconds)
1636 sub age_class {
1637         my $age = shift;
1638
1639         if (!defined $age) {
1640                 return "noage";
1641         } elsif ($age < 60*60*2) {
1642                 return "age0";
1643         } elsif ($age < 60*60*24*2) {
1644                 return "age1";
1645         } else {
1646                 return "age2";
1647         }
1648 }
1649
1650 # convert age in seconds to "nn units ago" string
1651 sub age_string {
1652         my $age = shift;
1653         my $age_str;
1654
1655         if ($age > 60*60*24*365*2) {
1656                 $age_str = (int $age/60/60/24/365);
1657                 $age_str .= " years ago";
1658         } elsif ($age > 60*60*24*(365/12)*2) {
1659                 $age_str = int $age/60/60/24/(365/12);
1660                 $age_str .= " months ago";
1661         } elsif ($age > 60*60*24*7*2) {
1662                 $age_str = int $age/60/60/24/7;
1663                 $age_str .= " weeks ago";
1664         } elsif ($age > 60*60*24*2) {
1665                 $age_str = int $age/60/60/24;
1666                 $age_str .= " days ago";
1667         } elsif ($age > 60*60*2) {
1668                 $age_str = int $age/60/60;
1669                 $age_str .= " hours ago";
1670         } elsif ($age > 60*2) {
1671                 $age_str = int $age/60;
1672                 $age_str .= " min ago";
1673         } elsif ($age > 2) {
1674                 $age_str = int $age;
1675                 $age_str .= " sec ago";
1676         } else {
1677                 $age_str .= " right now";
1678         }
1679         return $age_str;
1680 }
1681
1682 use constant {
1683         S_IFINVALID => 0030000,
1684         S_IFGITLINK => 0160000,
1685 };
1686
1687 # submodule/subproject, a commit object reference
1688 sub S_ISGITLINK {
1689         my $mode = shift;
1690
1691         return (($mode & S_IFMT) == S_IFGITLINK)
1692 }
1693
1694 # convert file mode in octal to symbolic file mode string
1695 sub mode_str {
1696         my $mode = oct shift;
1697
1698         if (S_ISGITLINK($mode)) {
1699                 return 'm---------';
1700         } elsif (S_ISDIR($mode & S_IFMT)) {
1701                 return 'drwxr-xr-x';
1702         } elsif (S_ISLNK($mode)) {
1703                 return 'lrwxrwxrwx';
1704         } elsif (S_ISREG($mode)) {
1705                 # git cares only about the executable bit
1706                 if ($mode & S_IXUSR) {
1707                         return '-rwxr-xr-x';
1708                 } else {
1709                         return '-rw-r--r--';
1710                 };
1711         } else {
1712                 return '----------';
1713         }
1714 }
1715
1716 # convert file mode in octal to file type string
1717 sub file_type {
1718         my $mode = shift;
1719
1720         if ($mode !~ m/^[0-7]+$/) {
1721                 return $mode;
1722         } else {
1723                 $mode = oct $mode;
1724         }
1725
1726         if (S_ISGITLINK($mode)) {
1727                 return "submodule";
1728         } elsif (S_ISDIR($mode & S_IFMT)) {
1729                 return "directory";
1730         } elsif (S_ISLNK($mode)) {
1731                 return "symlink";
1732         } elsif (S_ISREG($mode)) {
1733                 return "file";
1734         } else {
1735                 return "unknown";
1736         }
1737 }
1738
1739 # convert file mode in octal to file type description string
1740 sub file_type_long {
1741         my $mode = shift;
1742
1743         if ($mode !~ m/^[0-7]+$/) {
1744                 return $mode;
1745         } else {
1746                 $mode = oct $mode;
1747         }
1748
1749         if (S_ISGITLINK($mode)) {
1750                 return "submodule";
1751         } elsif (S_ISDIR($mode & S_IFMT)) {
1752                 return "directory";
1753         } elsif (S_ISLNK($mode)) {
1754                 return "symlink";
1755         } elsif (S_ISREG($mode)) {
1756                 if ($mode & S_IXUSR) {
1757                         return "executable";
1758                 } else {
1759                         return "file";
1760                 };
1761         } else {
1762                 return "unknown";
1763         }
1764 }
1765
1766
1767 ## ----------------------------------------------------------------------
1768 ## functions returning short HTML fragments, or transforming HTML fragments
1769 ## which don't belong to other sections
1770
1771 # format line of commit message.
1772 sub format_log_line_html {
1773         my $line = shift;
1774
1775         $line = esc_html($line, -nbsp=>1);
1776         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1777                 $cgi->a({-href => href(action=>"object", hash=>$1),
1778                                         -class => "text"}, $1);
1779         }eg;
1780
1781         return $line;
1782 }
1783
1784 # format marker of refs pointing to given object
1785
1786 # the destination action is chosen based on object type and current context:
1787 # - for annotated tags, we choose the tag view unless it's the current view
1788 #   already, in which case we go to shortlog view
1789 # - for other refs, we keep the current view if we're in history, shortlog or
1790 #   log view, and select shortlog otherwise
1791 sub format_ref_marker {
1792         my ($refs, $id) = @_;
1793         my $markers = '';
1794
1795         if (defined $refs->{$id}) {
1796                 foreach my $ref (@{$refs->{$id}}) {
1797                         # this code exploits the fact that non-lightweight tags are the
1798                         # only indirect objects, and that they are the only objects for which
1799                         # we want to use tag instead of shortlog as action
1800                         my ($type, $name) = qw();
1801                         my $indirect = ($ref =~ s/\^\{\}$//);
1802                         # e.g. tags/v2.6.11 or heads/next
1803                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1804                                 $type = $1;
1805                                 $name = $2;
1806                         } else {
1807                                 $type = "ref";
1808                                 $name = $ref;
1809                         }
1810
1811                         my $class = $type;
1812                         $class .= " indirect" if $indirect;
1813
1814                         my $dest_action = "shortlog";
1815
1816                         if ($indirect) {
1817                                 $dest_action = "tag" unless $action eq "tag";
1818                         } elsif ($action =~ /^(history|(short)?log)$/) {
1819                                 $dest_action = $action;
1820                         }
1821
1822                         my $dest = "";
1823                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1824                         $dest .= $ref;
1825
1826                         my $link = $cgi->a({
1827                                 -href => href(
1828                                         action=>$dest_action,
1829                                         hash=>$dest
1830                                 )}, $name);
1831
1832                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1833                                 $link . "</span>";
1834                 }
1835         }
1836
1837         if ($markers) {
1838                 return ' <span class="refs">'. $markers . '</span>';
1839         } else {
1840                 return "";
1841         }
1842 }
1843
1844 # format, perhaps shortened and with markers, title line
1845 sub format_subject_html {
1846         my ($long, $short, $href, $extra) = @_;
1847         $extra = '' unless defined($extra);
1848
1849         if (length($short) < length($long)) {
1850                 $long =~ s/[[:cntrl:]]/?/g;
1851                 return $cgi->a({-href => $href, -class => "list subject",
1852                                 -title => to_utf8($long)},
1853                        esc_html($short)) . $extra;
1854         } else {
1855                 return $cgi->a({-href => $href, -class => "list subject"},
1856                        esc_html($long)) . $extra;
1857         }
1858 }
1859
1860 # Rather than recomputing the url for an email multiple times, we cache it
1861 # after the first hit. This gives a visible benefit in views where the avatar
1862 # for the same email is used repeatedly (e.g. shortlog).
1863 # The cache is shared by all avatar engines (currently gravatar only), which
1864 # are free to use it as preferred. Since only one avatar engine is used for any
1865 # given page, there's no risk for cache conflicts.
1866 our %avatar_cache = ();
1867
1868 # Compute the picon url for a given email, by using the picon search service over at
1869 # http://www.cs.indiana.edu/picons/search.html
1870 sub picon_url {
1871         my $email = lc shift;
1872         if (!$avatar_cache{$email}) {
1873                 my ($user, $domain) = split('@', $email);
1874                 $avatar_cache{$email} =
1875                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1876                         "$domain/$user/" .
1877                         "users+domains+unknown/up/single";
1878         }
1879         return $avatar_cache{$email};
1880 }
1881
1882 # Compute the gravatar url for a given email, if it's not in the cache already.
1883 # Gravatar stores only the part of the URL before the size, since that's the
1884 # one computationally more expensive. This also allows reuse of the cache for
1885 # different sizes (for this particular engine).
1886 sub gravatar_url {
1887         my $email = lc shift;
1888         my $size = shift;
1889         $avatar_cache{$email} ||=
1890                 "http://www.gravatar.com/avatar/" .
1891                         Digest::MD5::md5_hex($email) . "?s=";
1892         return $avatar_cache{$email} . $size;
1893 }
1894
1895 # Insert an avatar for the given $email at the given $size if the feature
1896 # is enabled.
1897 sub git_get_avatar {
1898         my ($email, %opts) = @_;
1899         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1900         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1901         $opts{-size} ||= 'default';
1902         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1903         my $url = "";
1904         if ($git_avatar eq 'gravatar') {
1905                 $url = gravatar_url($email, $size);
1906         } elsif ($git_avatar eq 'picon') {
1907                 $url = picon_url($email);
1908         }
1909         # Other providers can be added by extending the if chain, defining $url
1910         # as needed. If no variant puts something in $url, we assume avatars
1911         # are completely disabled/unavailable.
1912         if ($url) {
1913                 return $pre_white .
1914                        "<img width=\"$size\" " .
1915                             "class=\"avatar\" " .
1916                             "src=\"".esc_url($url)."\" " .
1917                             "alt=\"\" " .
1918                        "/>" . $post_white;
1919         } else {
1920                 return "";
1921         }
1922 }
1923
1924 sub format_search_author {
1925         my ($author, $searchtype, $displaytext) = @_;
1926         my $have_search = gitweb_check_feature('search');
1927
1928         if ($have_search) {
1929                 my $performed = "";
1930                 if ($searchtype eq 'author') {
1931                         $performed = "authored";
1932                 } elsif ($searchtype eq 'committer') {
1933                         $performed = "committed";
1934                 }
1935
1936                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1937                                 searchtext=>$author,
1938                                 searchtype=>$searchtype), class=>"list",
1939                                 title=>"Search for commits $performed by $author"},
1940                                 $displaytext);
1941
1942         } else {
1943                 return $displaytext;
1944         }
1945 }
1946
1947 # format the author name of the given commit with the given tag
1948 # the author name is chopped and escaped according to the other
1949 # optional parameters (see chop_str).
1950 sub format_author_html {
1951         my $tag = shift;
1952         my $co = shift;
1953         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1954         return "<$tag class=\"author\">" .
1955                format_search_author($co->{'author_name'}, "author",
1956                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1957                        $author) .
1958                "</$tag>";
1959 }
1960
1961 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1962 sub format_git_diff_header_line {
1963         my $line = shift;
1964         my $diffinfo = shift;
1965         my ($from, $to) = @_;
1966
1967         if ($diffinfo->{'nparents'}) {
1968                 # combined diff
1969                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1970                 if ($to->{'href'}) {
1971                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1972                                          esc_path($to->{'file'}));
1973                 } else { # file was deleted (no href)
1974                         $line .= esc_path($to->{'file'});
1975                 }
1976         } else {
1977                 # "ordinary" diff
1978                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1979                 if ($from->{'href'}) {
1980                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1981                                          'a/' . esc_path($from->{'file'}));
1982                 } else { # file was added (no href)
1983                         $line .= 'a/' . esc_path($from->{'file'});
1984                 }
1985                 $line .= ' ';
1986                 if ($to->{'href'}) {
1987                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1988                                          'b/' . esc_path($to->{'file'}));
1989                 } else { # file was deleted
1990                         $line .= 'b/' . esc_path($to->{'file'});
1991                 }
1992         }
1993
1994         return "<div class=\"diff header\">$line</div>\n";
1995 }
1996
1997 # format extended diff header line, before patch itself
1998 sub format_extended_diff_header_line {
1999         my $line = shift;
2000         my $diffinfo = shift;
2001         my ($from, $to) = @_;
2002
2003         # match <path>
2004         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2005                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2006                                        esc_path($from->{'file'}));
2007         }
2008         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2009                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2010                                  esc_path($to->{'file'}));
2011         }
2012         # match single <mode>
2013         if ($line =~ m/\s(\d{6})$/) {
2014                 $line .= '<span class="info"> (' .
2015                          file_type_long($1) .
2016                          ')</span>';
2017         }
2018         # match <hash>
2019         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2020                 # can match only for combined diff
2021                 $line = 'index ';
2022                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2023                         if ($from->{'href'}[$i]) {
2024                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2025                                                   -class=>"hash"},
2026                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2027                         } else {
2028                                 $line .= '0' x 7;
2029                         }
2030                         # separator
2031                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2032                 }
2033                 $line .= '..';
2034                 if ($to->{'href'}) {
2035                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2036                                          substr($diffinfo->{'to_id'},0,7));
2037                 } else {
2038                         $line .= '0' x 7;
2039                 }
2040
2041         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2042                 # can match only for ordinary diff
2043                 my ($from_link, $to_link);
2044                 if ($from->{'href'}) {
2045                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2046                                              substr($diffinfo->{'from_id'},0,7));
2047                 } else {
2048                         $from_link = '0' x 7;
2049                 }
2050                 if ($to->{'href'}) {
2051                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2052                                            substr($diffinfo->{'to_id'},0,7));
2053                 } else {
2054                         $to_link = '0' x 7;
2055                 }
2056                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2057                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2058         }
2059
2060         return $line . "<br/>\n";
2061 }
2062
2063 # format from-file/to-file diff header
2064 sub format_diff_from_to_header {
2065         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2066         my $line;
2067         my $result = '';
2068
2069         $line = $from_line;
2070         #assert($line =~ m/^---/) if DEBUG;
2071         # no extra formatting for "^--- /dev/null"
2072         if (! $diffinfo->{'nparents'}) {
2073                 # ordinary (single parent) diff
2074                 if ($line =~ m!^--- "?a/!) {
2075                         if ($from->{'href'}) {
2076                                 $line = '--- a/' .
2077                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2078                                                 esc_path($from->{'file'}));
2079                         } else {
2080                                 $line = '--- a/' .
2081                                         esc_path($from->{'file'});
2082                         }
2083                 }
2084                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2085
2086         } else {
2087                 # combined diff (merge commit)
2088                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2089                         if ($from->{'href'}[$i]) {
2090                                 $line = '--- ' .
2091                                         $cgi->a({-href=>href(action=>"blobdiff",
2092                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2093                                                              hash_parent_base=>$parents[$i],
2094                                                              file_parent=>$from->{'file'}[$i],
2095                                                              hash=>$diffinfo->{'to_id'},
2096                                                              hash_base=>$hash,
2097                                                              file_name=>$to->{'file'}),
2098                                                  -class=>"path",
2099                                                  -title=>"diff" . ($i+1)},
2100                                                 $i+1) .
2101                                         '/' .
2102                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2103                                                 esc_path($from->{'file'}[$i]));
2104                         } else {
2105                                 $line = '--- /dev/null';
2106                         }
2107                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2108                 }
2109         }
2110
2111         $line = $to_line;
2112         #assert($line =~ m/^\+\+\+/) if DEBUG;
2113         # no extra formatting for "^+++ /dev/null"
2114         if ($line =~ m!^\+\+\+ "?b/!) {
2115                 if ($to->{'href'}) {
2116                         $line = '+++ b/' .
2117                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2118                                         esc_path($to->{'file'}));
2119                 } else {
2120                         $line = '+++ b/' .
2121                                 esc_path($to->{'file'});
2122                 }
2123         }
2124         $result .= qq!<div class="diff to_file">$line</div>\n!;
2125
2126         return $result;
2127 }
2128
2129 # create note for patch simplified by combined diff
2130 sub format_diff_cc_simplified {
2131         my ($diffinfo, @parents) = @_;
2132         my $result = '';
2133
2134         $result .= "<div class=\"diff header\">" .
2135                    "diff --cc ";
2136         if (!is_deleted($diffinfo)) {
2137                 $result .= $cgi->a({-href => href(action=>"blob",
2138                                                   hash_base=>$hash,
2139                                                   hash=>$diffinfo->{'to_id'},
2140                                                   file_name=>$diffinfo->{'to_file'}),
2141                                     -class => "path"},
2142                                    esc_path($diffinfo->{'to_file'}));
2143         } else {
2144                 $result .= esc_path($diffinfo->{'to_file'});
2145         }
2146         $result .= "</div>\n" . # class="diff header"
2147                    "<div class=\"diff nodifferences\">" .
2148                    "Simple merge" .
2149                    "</div>\n"; # class="diff nodifferences"
2150
2151         return $result;
2152 }
2153
2154 # format patch (diff) line (not to be used for diff headers)
2155 sub format_diff_line {
2156         my $line = shift;
2157         my ($from, $to) = @_;
2158         my $diff_class = "";
2159
2160         chomp $line;
2161
2162         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2163                 # combined diff
2164                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2165                 if ($line =~ m/^\@{3}/) {
2166                         $diff_class = " chunk_header";
2167                 } elsif ($line =~ m/^\\/) {
2168                         $diff_class = " incomplete";
2169                 } elsif ($prefix =~ tr/+/+/) {
2170                         $diff_class = " add";
2171                 } elsif ($prefix =~ tr/-/-/) {
2172                         $diff_class = " rem";
2173                 }
2174         } else {
2175                 # assume ordinary diff
2176                 my $char = substr($line, 0, 1);
2177                 if ($char eq '+') {
2178                         $diff_class = " add";
2179                 } elsif ($char eq '-') {
2180                         $diff_class = " rem";
2181                 } elsif ($char eq '@') {
2182                         $diff_class = " chunk_header";
2183                 } elsif ($char eq "\\") {
2184                         $diff_class = " incomplete";
2185                 }
2186         }
2187         $line = untabify($line);
2188         if ($from && $to && $line =~ m/^\@{2} /) {
2189                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2190                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2191
2192                 $from_lines = 0 unless defined $from_lines;
2193                 $to_lines   = 0 unless defined $to_lines;
2194
2195                 if ($from->{'href'}) {
2196                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2197                                              -class=>"list"}, $from_text);
2198                 }
2199                 if ($to->{'href'}) {
2200                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2201                                              -class=>"list"}, $to_text);
2202                 }
2203                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2204                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2205                 return "<div class=\"diff$diff_class\">$line</div>\n";
2206         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2207                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2208                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2209
2210                 @from_text = split(' ', $ranges);
2211                 for (my $i = 0; $i < @from_text; ++$i) {
2212                         ($from_start[$i], $from_nlines[$i]) =
2213                                 (split(',', substr($from_text[$i], 1)), 0);
2214                 }
2215
2216                 $to_text   = pop @from_text;
2217                 $to_start  = pop @from_start;
2218                 $to_nlines = pop @from_nlines;
2219
2220                 $line = "<span class=\"chunk_info\">$prefix ";
2221                 for (my $i = 0; $i < @from_text; ++$i) {
2222                         if ($from->{'href'}[$i]) {
2223                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2224                                                   -class=>"list"}, $from_text[$i]);
2225                         } else {
2226                                 $line .= $from_text[$i];
2227                         }
2228                         $line .= " ";
2229                 }
2230                 if ($to->{'href'}) {
2231                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2232                                           -class=>"list"}, $to_text);
2233                 } else {
2234                         $line .= $to_text;
2235                 }
2236                 $line .= " $prefix</span>" .
2237                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2238                 return "<div class=\"diff$diff_class\">$line</div>\n";
2239         }
2240         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2241 }
2242
2243 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2244 # linked.  Pass the hash of the tree/commit to snapshot.
2245 sub format_snapshot_links {
2246         my ($hash) = @_;
2247         my $num_fmts = @snapshot_fmts;
2248         if ($num_fmts > 1) {
2249                 # A parenthesized list of links bearing format names.
2250                 # e.g. "snapshot (_tar.gz_ _zip_)"
2251                 return "snapshot (" . join(' ', map
2252                         $cgi->a({
2253                                 -href => href(
2254                                         action=>"snapshot",
2255                                         hash=>$hash,
2256                                         snapshot_format=>$_
2257                                 )
2258                         }, $known_snapshot_formats{$_}{'display'})
2259                 , @snapshot_fmts) . ")";
2260         } elsif ($num_fmts == 1) {
2261                 # A single "snapshot" link whose tooltip bears the format name.
2262                 # i.e. "_snapshot_"
2263                 my ($fmt) = @snapshot_fmts;
2264                 return
2265                         $cgi->a({
2266                                 -href => href(
2267                                         action=>"snapshot",
2268                                         hash=>$hash,
2269                                         snapshot_format=>$fmt
2270                                 ),
2271                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2272                         }, "snapshot");
2273         } else { # $num_fmts == 0
2274                 return undef;
2275         }
2276 }
2277
2278 ## ......................................................................
2279 ## functions returning values to be passed, perhaps after some
2280 ## transformation, to other functions; e.g. returning arguments to href()
2281
2282 # returns hash to be passed to href to generate gitweb URL
2283 # in -title key it returns description of link
2284 sub get_feed_info {
2285         my $format = shift || 'Atom';
2286         my %res = (action => lc($format));
2287
2288         # feed links are possible only for project views
2289         return unless (defined $project);
2290         # some views should link to OPML, or to generic project feed,
2291         # or don't have specific feed yet (so they should use generic)
2292         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2293
2294         my $branch;
2295         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2296         # from tag links; this also makes possible to detect branch links
2297         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2298             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2299                 $branch = $1;
2300         }
2301         # find log type for feed description (title)
2302         my $type = 'log';
2303         if (defined $file_name) {
2304                 $type  = "history of $file_name";
2305                 $type .= "/" if ($action eq 'tree');
2306                 $type .= " on '$branch'" if (defined $branch);
2307         } else {
2308                 $type = "log of $branch" if (defined $branch);
2309         }
2310
2311         $res{-title} = $type;
2312         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2313         $res{'file_name'} = $file_name;
2314
2315         return %res;
2316 }
2317
2318 ## ----------------------------------------------------------------------
2319 ## git utility subroutines, invoking git commands
2320
2321 # returns path to the core git executable and the --git-dir parameter as list
2322 sub git_cmd {
2323         $number_of_git_cmds++;
2324         return $GIT, '--git-dir='.$git_dir;
2325 }
2326
2327 # quote the given arguments for passing them to the shell
2328 # quote_command("command", "arg 1", "arg with ' and ! characters")
2329 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2330 # Try to avoid using this function wherever possible.
2331 sub quote_command {
2332         return join(' ',
2333                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2334 }
2335
2336 # get HEAD ref of given project as hash
2337 sub git_get_head_hash {
2338         return git_get_full_hash(shift, 'HEAD');
2339 }
2340
2341 sub git_get_full_hash {
2342         return git_get_hash(@_);
2343 }
2344
2345 sub git_get_short_hash {
2346         return git_get_hash(@_, '--short=7');
2347 }
2348
2349 sub git_get_hash {
2350         my ($project, $hash, @options) = @_;
2351         my $o_git_dir = $git_dir;
2352         my $retval = undef;
2353         $git_dir = "$projectroot/$project";
2354         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2355             '--verify', '-q', @options, $hash) {
2356                 $retval = <$fd>;
2357                 chomp $retval if defined $retval;
2358                 close $fd;
2359         }
2360         if (defined $o_git_dir) {
2361                 $git_dir = $o_git_dir;
2362         }
2363         return $retval;
2364 }
2365
2366 # get type of given object
2367 sub git_get_type {
2368         my $hash = shift;
2369
2370         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2371         my $type = <$fd>;
2372         close $fd or return;
2373         chomp $type;
2374         return $type;
2375 }
2376
2377 # repository configuration
2378 our $config_file = '';
2379 our %config;
2380
2381 # store multiple values for single key as anonymous array reference
2382 # single values stored directly in the hash, not as [ <value> ]
2383 sub hash_set_multi {
2384         my ($hash, $key, $value) = @_;
2385
2386         if (!exists $hash->{$key}) {
2387                 $hash->{$key} = $value;
2388         } elsif (!ref $hash->{$key}) {
2389                 $hash->{$key} = [ $hash->{$key}, $value ];
2390         } else {
2391                 push @{$hash->{$key}}, $value;
2392         }
2393 }
2394
2395 # return hash of git project configuration
2396 # optionally limited to some section, e.g. 'gitweb'
2397 sub git_parse_project_config {
2398         my $section_regexp = shift;
2399         my %config;
2400
2401         local $/ = "\0";
2402
2403         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2404                 or return;
2405
2406         while (my $keyval = <$fh>) {
2407                 chomp $keyval;
2408                 my ($key, $value) = split(/\n/, $keyval, 2);
2409
2410                 hash_set_multi(\%config, $key, $value)
2411                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2412         }
2413         close $fh;
2414
2415         return %config;
2416 }
2417
2418 # convert config value to boolean: 'true' or 'false'
2419 # no value, number > 0, 'true' and 'yes' values are true
2420 # rest of values are treated as false (never as error)
2421 sub config_to_bool {
2422         my $val = shift;
2423
2424         return 1 if !defined $val;             # section.key
2425
2426         # strip leading and trailing whitespace
2427         $val =~ s/^\s+//;
2428         $val =~ s/\s+$//;
2429
2430         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2431                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2432 }
2433
2434 # convert config value to simple decimal number
2435 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2436 # to be multiplied by 1024, 1048576, or 1073741824
2437 sub config_to_int {
2438         my $val = shift;
2439
2440         # strip leading and trailing whitespace
2441         $val =~ s/^\s+//;
2442         $val =~ s/\s+$//;
2443
2444         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2445                 $unit = lc($unit);
2446                 # unknown unit is treated as 1
2447                 return $num * ($unit eq 'g' ? 1073741824 :
2448                                $unit eq 'm' ?    1048576 :
2449                                $unit eq 'k' ?       1024 : 1);
2450         }
2451         return $val;
2452 }
2453
2454 # convert config value to array reference, if needed
2455 sub config_to_multi {
2456         my $val = shift;
2457
2458         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2459 }
2460
2461 sub git_get_project_config {
2462         my ($key, $type) = @_;
2463
2464         return unless defined $git_dir;
2465
2466         # key sanity check
2467         return unless ($key);
2468         $key =~ s/^gitweb\.//;
2469         return if ($key =~ m/\W/);
2470
2471         # type sanity check
2472         if (defined $type) {
2473                 $type =~ s/^--//;
2474                 $type = undef
2475                         unless ($type eq 'bool' || $type eq 'int');
2476         }
2477
2478         # get config
2479         if (!defined $config_file ||
2480             $config_file ne "$git_dir/config") {
2481                 %config = git_parse_project_config('gitweb');
2482                 $config_file = "$git_dir/config";
2483         }
2484
2485         # check if config variable (key) exists
2486         return unless exists $config{"gitweb.$key"};
2487
2488         # ensure given type
2489         if (!defined $type) {
2490                 return $config{"gitweb.$key"};
2491         } elsif ($type eq 'bool') {
2492                 # backward compatibility: 'git config --bool' returns true/false
2493                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2494         } elsif ($type eq 'int') {
2495                 return config_to_int($config{"gitweb.$key"});
2496         }
2497         return $config{"gitweb.$key"};
2498 }
2499
2500 # get hash of given path at given ref
2501 sub git_get_hash_by_path {
2502         my $base = shift;
2503         my $path = shift || return undef;
2504         my $type = shift;
2505
2506         $path =~ s,/+$,,;
2507
2508         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2509                 or die_error(500, "Open git-ls-tree failed");
2510         my $line = <$fd>;
2511         close $fd or return undef;
2512
2513         if (!defined $line) {
2514                 # there is no tree or hash given by $path at $base
2515                 return undef;
2516         }
2517
2518         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2519         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2520         if (defined $type && $type ne $2) {
2521                 # type doesn't match
2522                 return undef;
2523         }
2524         return $3;
2525 }
2526
2527 # get path of entry with given hash at given tree-ish (ref)
2528 # used to get 'from' filename for combined diff (merge commit) for renames
2529 sub git_get_path_by_hash {
2530         my $base = shift || return;
2531         my $hash = shift || return;
2532
2533         local $/ = "\0";
2534
2535         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2536                 or return undef;
2537         while (my $line = <$fd>) {
2538                 chomp $line;
2539
2540                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2541                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2542                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2543                         close $fd;
2544                         return $1;
2545                 }
2546         }
2547         close $fd;
2548         return undef;
2549 }
2550
2551 ## ......................................................................
2552 ## git utility functions, directly accessing git repository
2553
2554 sub git_get_project_description {
2555         my $path = shift;
2556
2557         $git_dir = "$projectroot/$path";
2558         open my $fd, '<', "$git_dir/description"
2559                 or return git_get_project_config('description');
2560         my $descr = <$fd>;
2561         close $fd;
2562         if (defined $descr) {
2563                 chomp $descr;
2564         }
2565         return $descr;
2566 }
2567
2568 sub git_get_project_ctags {
2569         my $path = shift;
2570         my $ctags = {};
2571
2572         $git_dir = "$projectroot/$path";
2573         opendir my $dh, "$git_dir/ctags"
2574                 or return $ctags;
2575         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2576                 open my $ct, '<', $_ or next;
2577                 my $val = <$ct>;
2578                 chomp $val;
2579                 close $ct;
2580                 my $ctag = $_; $ctag =~ s#.*/##;
2581                 $ctags->{$ctag} = $val;
2582         }
2583         closedir $dh;
2584         $ctags;
2585 }
2586
2587 sub git_populate_project_tagcloud {
2588         my $ctags = shift;
2589
2590         # First, merge different-cased tags; tags vote on casing
2591         my %ctags_lc;
2592         foreach (keys %$ctags) {
2593                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2594                 if (not $ctags_lc{lc $_}->{topcount}
2595                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2596                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2597                         $ctags_lc{lc $_}->{topname} = $_;
2598                 }
2599         }
2600
2601         my $cloud;
2602         if (eval { require HTML::TagCloud; 1; }) {
2603                 $cloud = HTML::TagCloud->new;
2604                 foreach (sort keys %ctags_lc) {
2605                         # Pad the title with spaces so that the cloud looks
2606                         # less crammed.
2607                         my $title = $ctags_lc{$_}->{topname};
2608                         $title =~ s/ /&nbsp;/g;
2609                         $title =~ s/^/&nbsp;/g;
2610                         $title =~ s/$/&nbsp;/g;
2611                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2612                 }
2613         } else {
2614                 $cloud = \%ctags_lc;
2615         }
2616         $cloud;
2617 }
2618
2619 sub git_show_project_tagcloud {
2620         my ($cloud, $count) = @_;
2621         print STDERR ref($cloud)."..\n";
2622         if (ref $cloud eq 'HTML::TagCloud') {
2623                 return $cloud->html_and_css($count);
2624         } else {
2625                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2626                 return '<p align="center">' . join (', ', map {
2627                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2628                 } splice(@tags, 0, $count)) . '</p>';
2629         }
2630 }
2631
2632 sub git_get_project_url_list {
2633         my $path = shift;
2634
2635         $git_dir = "$projectroot/$path";
2636         open my $fd, '<', "$git_dir/cloneurl"
2637                 or return wantarray ?
2638                 @{ config_to_multi(git_get_project_config('url')) } :
2639                    config_to_multi(git_get_project_config('url'));
2640         my @git_project_url_list = map { chomp; $_ } <$fd>;
2641         close $fd;
2642
2643         return wantarray ? @git_project_url_list : \@git_project_url_list;
2644 }
2645
2646 sub git_get_projects_list {
2647         my ($filter) = @_;
2648         my @list;
2649
2650         $filter ||= '';
2651         $filter =~ s/\.git$//;
2652
2653         my $check_forks = gitweb_check_feature('forks');
2654
2655         if (-d $projects_list) {
2656                 # search in directory
2657                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2658                 # remove the trailing "/"
2659                 $dir =~ s!/+$!!;
2660                 my $pfxlen = length("$dir");
2661                 my $pfxdepth = ($dir =~ tr!/!!);
2662
2663                 File::Find::find({
2664                         follow_fast => 1, # follow symbolic links
2665                         follow_skip => 2, # ignore duplicates
2666                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2667                         wanted => sub {
2668                                 # global variables
2669                                 our $project_maxdepth;
2670                                 our $projectroot;
2671                                 # skip project-list toplevel, if we get it.
2672                                 return if (m!^[/.]$!);
2673                                 # only directories can be git repositories
2674                                 return unless (-d $_);
2675                                 # don't traverse too deep (Find is super slow on os x)
2676                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2677                                         $File::Find::prune = 1;
2678                                         return;
2679                                 }
2680
2681                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2682                                 # we check related file in $projectroot
2683                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2684                                 if (check_export_ok("$projectroot/$path")) {
2685                                         push @list, { path => $path };
2686                                         $File::Find::prune = 1;
2687                                 }
2688                         },
2689                 }, "$dir");
2690
2691         } elsif (-f $projects_list) {
2692                 # read from file(url-encoded):
2693                 # 'git%2Fgit.git Linus+Torvalds'
2694                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2695                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2696                 my %paths;
2697                 open my $fd, '<', $projects_list or return;
2698         PROJECT:
2699                 while (my $line = <$fd>) {
2700                         chomp $line;
2701                         my ($path, $owner) = split ' ', $line;
2702                         $path = unescape($path);
2703                         $owner = unescape($owner);
2704                         if (!defined $path) {
2705                                 next;
2706                         }
2707                         if ($filter ne '') {
2708                                 # looking for forks;
2709                                 my $pfx = substr($path, 0, length($filter));
2710                                 if ($pfx ne $filter) {
2711                                         next PROJECT;
2712                                 }
2713                                 my $sfx = substr($path, length($filter));
2714                                 if ($sfx !~ /^\/.*\.git$/) {
2715                                         next PROJECT;
2716                                 }
2717                         } elsif ($check_forks) {
2718                         PATH:
2719                                 foreach my $filter (keys %paths) {
2720                                         # looking for forks;
2721                                         my $pfx = substr($path, 0, length($filter));
2722                                         if ($pfx ne $filter) {
2723                                                 next PATH;
2724                                         }
2725                                         my $sfx = substr($path, length($filter));
2726                                         if ($sfx !~ /^\/.*\.git$/) {
2727                                                 next PATH;
2728                                         }
2729                                         # is a fork, don't include it in
2730                                         # the list
2731                                         next PROJECT;
2732                                 }
2733                         }
2734                         if (check_export_ok("$projectroot/$path")) {
2735                                 my $pr = {
2736                                         path => $path,
2737                                         owner => to_utf8($owner),
2738                                 };
2739                                 push @list, $pr;
2740                                 (my $forks_path = $path) =~ s/\.git$//;
2741                                 $paths{$forks_path}++;
2742                         }
2743                 }
2744                 close $fd;
2745         }
2746         return @list;
2747 }
2748
2749 our $gitweb_project_owner = undef;
2750 sub git_get_project_list_from_file {
2751
2752         return if (defined $gitweb_project_owner);
2753
2754         $gitweb_project_owner = {};
2755         # read from file (url-encoded):
2756         # 'git%2Fgit.git Linus+Torvalds'
2757         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2758         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2759         if (-f $projects_list) {
2760                 open(my $fd, '<', $projects_list);
2761                 while (my $line = <$fd>) {
2762                         chomp $line;
2763                         my ($pr, $ow) = split ' ', $line;
2764                         $pr = unescape($pr);
2765                         $ow = unescape($ow);
2766                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2767                 }
2768                 close $fd;
2769         }
2770 }
2771
2772 sub git_get_project_owner {
2773         my $project = shift;
2774         my $owner;
2775
2776         return undef unless $project;
2777         $git_dir = "$projectroot/$project";
2778
2779         if (!defined $gitweb_project_owner) {
2780                 git_get_project_list_from_file();
2781         }
2782
2783         if (exists $gitweb_project_owner->{$project}) {
2784                 $owner = $gitweb_project_owner->{$project};
2785         }
2786         if (!defined $owner){
2787                 $owner = git_get_project_config('owner');
2788         }
2789         if (!defined $owner) {
2790                 $owner = get_file_owner("$git_dir");
2791         }
2792
2793         return $owner;
2794 }
2795
2796 sub git_get_last_activity {
2797         my ($path) = @_;
2798         my $fd;
2799
2800         $git_dir = "$projectroot/$path";
2801         open($fd, "-|", git_cmd(), 'for-each-ref',
2802              '--format=%(committer)',
2803              '--sort=-committerdate',
2804              '--count=1',
2805              'refs/heads') or return;
2806         my $most_recent = <$fd>;
2807         close $fd or return;
2808         if (defined $most_recent &&
2809             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2810                 my $timestamp = $1;
2811                 my $age = time - $timestamp;
2812                 return ($age, age_string($age));
2813         }
2814         return (undef, undef);
2815 }
2816
2817 # Implementation note: when a single remote is wanted, we cannot use 'git
2818 # remote show -n' because that command always work (assuming it's a remote URL
2819 # if it's not defined), and we cannot use 'git remote show' because that would
2820 # try to make a network roundtrip. So the only way to find if that particular
2821 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2822 # and when we find what we want.
2823 sub git_get_remotes_list {
2824         my $wanted = shift;
2825         my %remotes = ();
2826
2827         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2828         return unless $fd;
2829         while (my $remote = <$fd>) {
2830                 chomp $remote;
2831                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2832                 next if $wanted and not $remote eq $wanted;
2833                 my ($url, $key) = ($1, $2);
2834
2835                 $remotes{$remote} ||= { 'heads' => () };
2836                 $remotes{$remote}{$key} = $url;
2837         }
2838         close $fd or return;
2839         return wantarray ? %remotes : \%remotes;
2840 }
2841
2842 # Takes a hash of remotes as first parameter and fills it by adding the
2843 # available remote heads for each of the indicated remotes.
2844 sub fill_remote_heads {
2845         my $remotes = shift;
2846         my @heads = map { "remotes/$_" } keys %$remotes;
2847         my @remoteheads = git_get_heads_list(undef, @heads);
2848         foreach my $remote (keys %$remotes) {
2849                 $remotes->{$remote}{'heads'} = [ grep {
2850                         $_->{'name'} =~ s!^$remote/!!
2851                         } @remoteheads ];
2852         }
2853 }
2854
2855 sub git_get_references {
2856         my $type = shift || "";
2857         my %refs;
2858         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2859         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2860         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2861                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2862                 or return;
2863
2864         while (my $line = <$fd>) {
2865                 chomp $line;
2866                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2867                         if (defined $refs{$1}) {
2868                                 push @{$refs{$1}}, $2;
2869                         } else {
2870                                 $refs{$1} = [ $2 ];
2871                         }
2872                 }
2873         }
2874         close $fd or return;
2875         return \%refs;
2876 }
2877
2878 sub git_get_rev_name_tags {
2879         my $hash = shift || return undef;
2880
2881         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2882                 or return;
2883         my $name_rev = <$fd>;
2884         close $fd;
2885
2886         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2887                 return $1;
2888         } else {
2889                 # catches also '$hash undefined' output
2890                 return undef;
2891         }
2892 }
2893
2894 ## ----------------------------------------------------------------------
2895 ## parse to hash functions
2896
2897 sub parse_date {
2898         my $epoch = shift;
2899         my $tz = shift || "-0000";
2900
2901         my %date;
2902         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2903         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2904         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2905         $date{'hour'} = $hour;
2906         $date{'minute'} = $min;
2907         $date{'mday'} = $mday;
2908         $date{'day'} = $days[$wday];
2909         $date{'month'} = $months[$mon];
2910         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2911                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2912         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2913                              $mday, $months[$mon], $hour ,$min;
2914         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2915                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2916
2917         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2918         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2919         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2920         $date{'hour_local'} = $hour;
2921         $date{'minute_local'} = $min;
2922         $date{'tz_local'} = $tz;
2923         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2924                                   1900+$year, $mon+1, $mday,
2925                                   $hour, $min, $sec, $tz);
2926         return %date;
2927 }
2928
2929 sub parse_tag {
2930         my $tag_id = shift;
2931         my %tag;
2932         my @comment;
2933
2934         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2935         $tag{'id'} = $tag_id;
2936         while (my $line = <$fd>) {
2937                 chomp $line;
2938                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2939                         $tag{'object'} = $1;
2940                 } elsif ($line =~ m/^type (.+)$/) {
2941                         $tag{'type'} = $1;
2942                 } elsif ($line =~ m/^tag (.+)$/) {
2943                         $tag{'name'} = $1;
2944                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2945                         $tag{'author'} = $1;
2946                         $tag{'author_epoch'} = $2;
2947                         $tag{'author_tz'} = $3;
2948                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2949                                 $tag{'author_name'}  = $1;
2950                                 $tag{'author_email'} = $2;
2951                         } else {
2952                                 $tag{'author_name'} = $tag{'author'};
2953                         }
2954                 } elsif ($line =~ m/--BEGIN/) {
2955                         push @comment, $line;
2956                         last;
2957                 } elsif ($line eq "") {
2958                         last;
2959                 }
2960         }
2961         push @comment, <$fd>;
2962         $tag{'comment'} = \@comment;
2963         close $fd or return;
2964         if (!defined $tag{'name'}) {
2965                 return
2966         };
2967         return %tag
2968 }
2969
2970 sub parse_commit_text {
2971         my ($commit_text, $withparents) = @_;
2972         my @commit_lines = split '\n', $commit_text;
2973         my %co;
2974
2975         pop @commit_lines; # Remove '\0'
2976
2977         if (! @commit_lines) {
2978                 return;
2979         }
2980
2981         my $header = shift @commit_lines;
2982         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2983                 return;
2984         }
2985         ($co{'id'}, my @parents) = split ' ', $header;
2986         while (my $line = shift @commit_lines) {
2987                 last if $line eq "\n";
2988                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2989                         $co{'tree'} = $1;
2990                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2991                         push @parents, $1;
2992                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2993                         $co{'author'} = to_utf8($1);
2994                         $co{'author_epoch'} = $2;
2995                         $co{'author_tz'} = $3;
2996                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2997                                 $co{'author_name'}  = $1;
2998                                 $co{'author_email'} = $2;
2999                         } else {
3000                                 $co{'author_name'} = $co{'author'};
3001                         }
3002                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3003                         $co{'committer'} = to_utf8($1);
3004                         $co{'committer_epoch'} = $2;
3005                         $co{'committer_tz'} = $3;
3006                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3007                                 $co{'committer_name'}  = $1;
3008                                 $co{'committer_email'} = $2;
3009                         } else {
3010                                 $co{'committer_name'} = $co{'committer'};
3011                         }
3012                 }
3013         }
3014         if (!defined $co{'tree'}) {
3015                 return;
3016         };
3017         $co{'parents'} = \@parents;
3018         $co{'parent'} = $parents[0];
3019
3020         foreach my $title (@commit_lines) {
3021                 $title =~ s/^    //;
3022                 if ($title ne "") {
3023                         $co{'title'} = chop_str($title, 80, 5);
3024                         # remove leading stuff of merges to make the interesting part visible
3025                         if (length($title) > 50) {
3026                                 $title =~ s/^Automatic //;
3027                                 $title =~ s/^merge (of|with) /Merge ... /i;
3028                                 if (length($title) > 50) {
3029                                         $title =~ s/(http|rsync):\/\///;
3030                                 }
3031                                 if (length($title) > 50) {
3032                                         $title =~ s/(master|www|rsync)\.//;
3033                                 }
3034                                 if (length($title) > 50) {
3035                                         $title =~ s/kernel.org:?//;
3036                                 }
3037                                 if (length($title) > 50) {
3038                                         $title =~ s/\/pub\/scm//;
3039                                 }
3040                         }
3041                         $co{'title_short'} = chop_str($title, 50, 5);
3042                         last;
3043                 }
3044         }
3045         if (! defined $co{'title'} || $co{'title'} eq "") {
3046                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3047         }
3048         # remove added spaces
3049         foreach my $line (@commit_lines) {
3050                 $line =~ s/^    //;
3051         }
3052         $co{'comment'} = \@commit_lines;
3053
3054         my $age = time - $co{'committer_epoch'};
3055         $co{'age'} = $age;
3056         $co{'age_string'} = age_string($age);
3057         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3058         if ($age > 60*60*24*7*2) {
3059                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3060                 $co{'age_string_age'} = $co{'age_string'};
3061         } else {
3062                 $co{'age_string_date'} = $co{'age_string'};
3063                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3064         }
3065         return %co;
3066 }
3067
3068 sub parse_commit {
3069         my ($commit_id) = @_;
3070         my %co;
3071
3072         local $/ = "\0";
3073
3074         open my $fd, "-|", git_cmd(), "rev-list",
3075                 "--parents",
3076                 "--header",
3077                 "--max-count=1",
3078                 $commit_id,
3079                 "--",
3080                 or die_error(500, "Open git-rev-list failed");
3081         %co = parse_commit_text(<$fd>, 1);
3082         close $fd;
3083
3084         return %co;
3085 }
3086
3087 sub parse_commits {
3088         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3089         my @cos;
3090
3091         $maxcount ||= 1;
3092         $skip ||= 0;
3093
3094         local $/ = "\0";
3095
3096         open my $fd, "-|", git_cmd(), "rev-list",
3097                 "--header",
3098                 @args,
3099                 ("--max-count=" . $maxcount),
3100                 ("--skip=" . $skip),
3101                 @extra_options,
3102                 $commit_id,
3103                 "--",
3104                 ($filename ? ($filename) : ())
3105                 or die_error(500, "Open git-rev-list failed");
3106         while (my $line = <$fd>) {
3107                 my %co = parse_commit_text($line);
3108                 push @cos, \%co;
3109         }
3110         close $fd;
3111
3112         return wantarray ? @cos : \@cos;
3113 }
3114
3115 # parse line of git-diff-tree "raw" output
3116 sub parse_difftree_raw_line {
3117         my $line = shift;
3118         my %res;
3119
3120         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3121         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3122         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3123                 $res{'from_mode'} = $1;
3124                 $res{'to_mode'} = $2;
3125                 $res{'from_id'} = $3;
3126                 $res{'to_id'} = $4;
3127                 $res{'status'} = $5;
3128                 $res{'similarity'} = $6;
3129                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3130                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3131                 } else {
3132                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3133                 }
3134         }
3135         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3136         # combined diff (for merge commit)
3137         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3138                 $res{'nparents'}  = length($1);
3139                 $res{'from_mode'} = [ split(' ', $2) ];
3140                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3141                 $res{'from_id'} = [ split(' ', $3) ];
3142                 $res{'to_id'} = pop @{$res{'from_id'}};
3143                 $res{'status'} = [ split('', $4) ];
3144                 $res{'to_file'} = unquote($5);
3145         }
3146         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3147         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3148                 $res{'commit'} = $1;
3149         }
3150
3151         return wantarray ? %res : \%res;
3152 }
3153
3154 # wrapper: return parsed line of git-diff-tree "raw" output
3155 # (the argument might be raw line, or parsed info)
3156 sub parsed_difftree_line {
3157         my $line_or_ref = shift;
3158
3159         if (ref($line_or_ref) eq "HASH") {
3160                 # pre-parsed (or generated by hand)
3161                 return $line_or_ref;
3162         } else {
3163                 return parse_difftree_raw_line($line_or_ref);
3164         }
3165 }
3166
3167 # parse line of git-ls-tree output
3168 sub parse_ls_tree_line {
3169         my $line = shift;
3170         my %opts = @_;
3171         my %res;
3172
3173         if ($opts{'-l'}) {
3174                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3175                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3176
3177                 $res{'mode'} = $1;
3178                 $res{'type'} = $2;
3179                 $res{'hash'} = $3;
3180                 $res{'size'} = $4;
3181                 if ($opts{'-z'}) {
3182                         $res{'name'} = $5;
3183                 } else {
3184                         $res{'name'} = unquote($5);
3185                 }
3186         } else {
3187                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3188                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3189
3190                 $res{'mode'} = $1;
3191                 $res{'type'} = $2;
3192                 $res{'hash'} = $3;
3193                 if ($opts{'-z'}) {
3194                         $res{'name'} = $4;
3195                 } else {
3196                         $res{'name'} = unquote($4);
3197                 }
3198         }
3199
3200         return wantarray ? %res : \%res;
3201 }
3202
3203 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3204 sub parse_from_to_diffinfo {
3205         my ($diffinfo, $from, $to, @parents) = @_;
3206
3207         if ($diffinfo->{'nparents'}) {
3208                 # combined diff
3209                 $from->{'file'} = [];
3210                 $from->{'href'} = [];
3211                 fill_from_file_info($diffinfo, @parents)
3212                         unless exists $diffinfo->{'from_file'};
3213                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3214                         $from->{'file'}[$i] =
3215                                 defined $diffinfo->{'from_file'}[$i] ?
3216                                         $diffinfo->{'from_file'}[$i] :
3217                                         $diffinfo->{'to_file'};
3218                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3219                                 $from->{'href'}[$i] = href(action=>"blob",
3220                                                            hash_base=>$parents[$i],
3221                                                            hash=>$diffinfo->{'from_id'}[$i],
3222                                                            file_name=>$from->{'file'}[$i]);
3223                         } else {
3224                                 $from->{'href'}[$i] = undef;
3225                         }
3226                 }
3227         } else {
3228                 # ordinary (not combined) diff
3229                 $from->{'file'} = $diffinfo->{'from_file'};
3230                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3231                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3232                                                hash=>$diffinfo->{'from_id'},
3233                                                file_name=>$from->{'file'});
3234                 } else {
3235                         delete $from->{'href'};
3236                 }
3237         }
3238
3239         $to->{'file'} = $diffinfo->{'to_file'};
3240         if (!is_deleted($diffinfo)) { # file exists in result
3241                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3242                                      hash=>$diffinfo->{'to_id'},
3243                                      file_name=>$to->{'file'});
3244         } else {
3245                 delete $to->{'href'};
3246         }
3247 }
3248
3249 ## ......................................................................
3250 ## parse to array of hashes functions
3251
3252 sub git_get_heads_list {
3253         my ($limit, @classes) = @_;
3254         @classes = ('heads') unless @classes;
3255         my @patterns = map { "refs/$_" } @classes;
3256         my @headslist;
3257
3258         open my $fd, '-|', git_cmd(), 'for-each-ref',
3259                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3260                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3261                 @patterns
3262                 or return;
3263         while (my $line = <$fd>) {
3264                 my %ref_item;
3265
3266                 chomp $line;
3267                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3268                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3269                 my ($committer, $epoch, $tz) =
3270                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3271                 $ref_item{'fullname'}  = $name;
3272                 $name =~ s!^refs/(?:head|remote)s/!!;
3273
3274                 $ref_item{'name'}  = $name;
3275                 $ref_item{'id'}    = $hash;
3276                 $ref_item{'title'} = $title || '(no commit message)';
3277                 $ref_item{'epoch'} = $epoch;
3278                 if ($epoch) {
3279                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3280                 } else {
3281                         $ref_item{'age'} = "unknown";
3282                 }
3283
3284                 push @headslist, \%ref_item;
3285         }
3286         close $fd;
3287
3288         return wantarray ? @headslist : \@headslist;
3289 }
3290
3291 sub git_get_tags_list {
3292         my $limit = shift;
3293         my @tagslist;
3294
3295         open my $fd, '-|', git_cmd(), 'for-each-ref',
3296                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3297                 '--format=%(objectname) %(objecttype) %(refname) '.
3298                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3299                 'refs/tags'
3300                 or return;
3301         while (my $line = <$fd>) {
3302                 my %ref_item;
3303
3304                 chomp $line;
3305                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3306                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3307                 my ($creator, $epoch, $tz) =
3308                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3309                 $ref_item{'fullname'} = $name;
3310                 $name =~ s!^refs/tags/!!;
3311
3312                 $ref_item{'type'} = $type;
3313                 $ref_item{'id'} = $id;
3314                 $ref_item{'name'} = $name;
3315                 if ($type eq "tag") {
3316                         $ref_item{'subject'} = $title;
3317                         $ref_item{'reftype'} = $reftype;
3318                         $ref_item{'refid'}   = $refid;
3319                 } else {
3320                         $ref_item{'reftype'} = $type;
3321                         $ref_item{'refid'}   = $id;
3322                 }
3323
3324                 if ($type eq "tag" || $type eq "commit") {
3325                         $ref_item{'epoch'} = $epoch;
3326                         if ($epoch) {
3327                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3328                         } else {
3329                                 $ref_item{'age'} = "unknown";
3330                         }
3331                 }
3332
3333                 push @tagslist, \%ref_item;
3334         }
3335         close $fd;
3336
3337         return wantarray ? @tagslist : \@tagslist;
3338 }
3339
3340 ## ----------------------------------------------------------------------
3341 ## filesystem-related functions
3342
3343 sub get_file_owner {
3344         my $path = shift;
3345
3346         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3347         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3348         if (!defined $gcos) {
3349                 return undef;
3350         }
3351         my $owner = $gcos;
3352         $owner =~ s/[,;].*$//;
3353         return to_utf8($owner);
3354 }
3355
3356 # assume that file exists
3357 sub insert_file {
3358         my $filename = shift;
3359
3360         open my $fd, '<', $filename;
3361         print map { to_utf8($_) } <$fd>;
3362         close $fd;
3363 }
3364
3365 ## ......................................................................
3366 ## mimetype related functions
3367
3368 sub mimetype_guess_file {
3369         my $filename = shift;
3370         my $mimemap = shift;
3371         -r $mimemap or return undef;
3372
3373         my %mimemap;
3374         open(my $mh, '<', $mimemap) or return undef;
3375         while (<$mh>) {
3376                 next if m/^#/; # skip comments
3377                 my ($mimetype, $exts) = split(/\t+/);
3378                 if (defined $exts) {
3379                         my @exts = split(/\s+/, $exts);
3380                         foreach my $ext (@exts) {
3381                                 $mimemap{$ext} = $mimetype;
3382                         }
3383                 }
3384         }
3385         close($mh);
3386
3387         $filename =~ /\.([^.]*)$/;
3388         return $mimemap{$1};
3389 }
3390
3391 sub mimetype_guess {
3392         my $filename = shift;
3393         my $mime;
3394         $filename =~ /\./ or return undef;
3395
3396         if ($mimetypes_file) {
3397                 my $file = $mimetypes_file;
3398                 if ($file !~ m!^/!) { # if it is relative path
3399                         # it is relative to project
3400                         $file = "$projectroot/$project/$file";
3401                 }
3402                 $mime = mimetype_guess_file($filename, $file);
3403         }
3404         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3405         return $mime;
3406 }
3407
3408 sub blob_mimetype {
3409         my $fd = shift;
3410         my $filename = shift;
3411
3412         if ($filename) {
3413                 my $mime = mimetype_guess($filename);
3414                 $mime and return $mime;
3415         }
3416
3417         # just in case
3418         return $default_blob_plain_mimetype unless $fd;
3419
3420         if (-T $fd) {
3421                 return 'text/plain';
3422         } elsif (! $filename) {
3423                 return 'application/octet-stream';
3424         } elsif ($filename =~ m/\.png$/i) {
3425                 return 'image/png';
3426         } elsif ($filename =~ m/\.gif$/i) {
3427                 return 'image/gif';
3428         } elsif ($filename =~ m/\.jpe?g$/i) {
3429                 return 'image/jpeg';
3430         } else {
3431                 return 'application/octet-stream';
3432         }
3433 }
3434
3435 sub blob_contenttype {
3436         my ($fd, $file_name, $type) = @_;
3437
3438         $type ||= blob_mimetype($fd, $file_name);
3439         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3440                 $type .= "; charset=$default_text_plain_charset";
3441         }
3442
3443         return $type;
3444 }
3445
3446 # guess file syntax for syntax highlighting; return undef if no highlighting
3447 # the name of syntax can (in the future) depend on syntax highlighter used
3448 sub guess_file_syntax {
3449         my ($highlight, $mimetype, $file_name) = @_;
3450         return undef unless ($highlight && defined $file_name);
3451         my $basename = basename($file_name, '.in');
3452         return $highlight_basename{$basename}
3453                 if exists $highlight_basename{$basename};
3454
3455         $basename =~ /\.([^.]*)$/;
3456         my $ext = $1 or return undef;
3457         return $highlight_ext{$ext}
3458                 if exists $highlight_ext{$ext};
3459
3460         return undef;
3461 }
3462
3463 # run highlighter and return FD of its output,
3464 # or return original FD if no highlighting
3465 sub run_highlighter {
3466         my ($fd, $highlight, $syntax) = @_;
3467         return $fd unless ($highlight && defined $syntax);
3468
3469         close $fd
3470                 or die_error(404, "Reading blob failed");
3471         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3472                   quote_command($highlight_bin).
3473                   " --xhtml --fragment --syntax $syntax |"
3474                 or die_error(500, "Couldn't open file or run syntax highlighter");
3475         return $fd;
3476 }
3477
3478 ## ======================================================================
3479 ## functions printing HTML: header, footer, error page
3480
3481 sub get_page_title {
3482         my $title = to_utf8($site_name);
3483
3484         return $title unless (defined $project);
3485         $title .= " - " . to_utf8($project);
3486
3487         return $title unless (defined $action);
3488         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3489
3490         return $title unless (defined $file_name);
3491         $title .= " - " . esc_path($file_name);
3492         if ($action eq "tree" && $file_name !~ m|/$|) {
3493                 $title .= "/";
3494         }
3495
3496         return $title;
3497 }
3498
3499 sub print_feed_meta {
3500         if (defined $project) {
3501                 my %href_params = get_feed_info();
3502                 if (!exists $href_params{'-title'}) {
3503                         $href_params{'-title'} = 'log';
3504                 }
3505
3506                 foreach my $format qw(RSS Atom) {
3507                         my $type = lc($format);
3508                         my %link_attr = (
3509                                 '-rel' => 'alternate',
3510                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3511                                 '-type' => "application/$type+xml"
3512                         );
3513
3514                         $href_params{'action'} = $type;
3515                         $link_attr{'-href'} = href(%href_params);
3516                         print "<link ".
3517                               "rel=\"$link_attr{'-rel'}\" ".
3518                               "title=\"$link_attr{'-title'}\" ".
3519                               "href=\"$link_attr{'-href'}\" ".
3520                               "type=\"$link_attr{'-type'}\" ".
3521                               "/>\n";
3522
3523                         $href_params{'extra_options'} = '--no-merges';
3524                         $link_attr{'-href'} = href(%href_params);
3525                         $link_attr{'-title'} .= ' (no merges)';
3526                         print "<link ".
3527                               "rel=\"$link_attr{'-rel'}\" ".
3528                               "title=\"$link_attr{'-title'}\" ".
3529                               "href=\"$link_attr{'-href'}\" ".
3530                               "type=\"$link_attr{'-type'}\" ".
3531                               "/>\n";
3532                 }
3533
3534         } else {
3535                 printf('<link rel="alternate" title="%s projects list" '.
3536                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3537                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3538                 printf('<link rel="alternate" title="%s projects feeds" '.
3539                        'href="%s" type="text/x-opml" />'."\n",
3540                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3541         }
3542 }
3543
3544 sub git_header_html {
3545         my $status = shift || "200 OK";
3546         my $expires = shift;
3547         my %opts = @_;
3548
3549         my $title = get_page_title();
3550         my $content_type;
3551         # require explicit support from the UA if we are to send the page as
3552         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3553         # we have to do this because MSIE sometimes globs '*/*', pretending to
3554         # support xhtml+xml but choking when it gets what it asked for.
3555         if (defined $cgi->http('HTTP_ACCEPT') &&
3556             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3557             $cgi->Accept('application/xhtml+xml') != 0) {
3558                 $content_type = 'application/xhtml+xml';
3559         } else {
3560                 $content_type = 'text/html';
3561         }
3562         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3563                            -status=> $status, -expires => $expires)
3564                 unless ($opts{'-no_http_header'});
3565         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3566         print <<EOF;
3567 <?xml version="1.0" encoding="utf-8"?>
3568 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3569 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3570 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3571 <!-- git core binaries version $git_version -->
3572 <head>
3573 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3574 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3575 <meta name="robots" content="index, nofollow"/>
3576 <title>$title</title>
3577 EOF
3578         # the stylesheet, favicon etc urls won't work correctly with path_info
3579         # unless we set the appropriate base URL
3580         if ($ENV{'PATH_INFO'}) {
3581                 print "<base href=\"".esc_url($base_url)."\" />\n";
3582         }
3583         # print out each stylesheet that exist, providing backwards capability
3584         # for those people who defined $stylesheet in a config file
3585         if (defined $stylesheet) {
3586                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3587         } else {
3588                 foreach my $stylesheet (@stylesheets) {
3589                         next unless $stylesheet;
3590                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3591                 }
3592         }
3593         print_feed_meta()
3594                 if ($status eq '200 OK');
3595         if (defined $favicon) {
3596                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3597         }
3598
3599         print "</head>\n" .
3600               "<body>\n";
3601
3602         if (defined $site_header && -f $site_header) {
3603                 insert_file($site_header);
3604         }
3605
3606         print "<div class=\"page_header\">\n";
3607         if (defined $logo) {
3608                 print $cgi->a({-href => esc_url($logo_url),
3609                                -title => $logo_label},
3610                               $cgi->img({-src => esc_url($logo),
3611                                          -width => 72, -height => 27,
3612                                          -alt => "git",
3613                                          -class => "logo"}));
3614         }
3615         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3616         if (defined $project) {
3617                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3618                 if (defined $action) {
3619                         my $action_print = $action ;
3620                         if (defined $opts{-action_extra}) {
3621                                 $action_print = $cgi->a({-href => href(action=>$action)},
3622                                         $action);
3623                         }
3624                         print " / $action_print";
3625                 }
3626                 if (defined $opts{-action_extra}) {
3627                         print " / $opts{-action_extra}";
3628                 }
3629                 print "\n";
3630         }
3631         print "</div>\n";
3632
3633         my $have_search = gitweb_check_feature('search');
3634         if (defined $project && $have_search) {
3635                 if (!defined $searchtext) {
3636                         $searchtext = "";
3637                 }
3638                 my $search_hash;
3639                 if (defined $hash_base) {
3640                         $search_hash = $hash_base;
3641                 } elsif (defined $hash) {
3642                         $search_hash = $hash;
3643                 } else {
3644                         $search_hash = "HEAD";
3645                 }
3646                 my $action = $my_uri;
3647                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3648                 if ($use_pathinfo) {
3649                         $action .= "/".esc_url($project);
3650                 }
3651                 print $cgi->startform(-method => "get", -action => $action) .
3652                       "<div class=\"search\">\n" .
3653                       (!$use_pathinfo &&
3654                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3655                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3656                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3657                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3658                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3659                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3660                       " search:\n",
3661                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3662                       "<span title=\"Extended regular expression\">" .
3663                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3664                                      -checked => $search_use_regexp) .
3665                       "</span>" .
3666                       "</div>" .
3667                       $cgi->end_form() . "\n";
3668         }
3669 }
3670
3671 sub git_footer_html {
3672         my $feed_class = 'rss_logo';
3673
3674         print "<div class=\"page_footer\">\n";
3675         if (defined $project) {
3676                 my $descr = git_get_project_description($project);
3677                 if (defined $descr) {
3678                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3679                 }
3680
3681                 my %href_params = get_feed_info();
3682                 if (!%href_params) {
3683                         $feed_class .= ' generic';
3684                 }
3685                 $href_params{'-title'} ||= 'log';
3686
3687                 foreach my $format qw(RSS Atom) {
3688                         $href_params{'action'} = lc($format);
3689                         print $cgi->a({-href => href(%href_params),
3690                                       -title => "$href_params{'-title'} $format feed",
3691                                       -class => $feed_class}, $format)."\n";
3692                 }
3693
3694         } else {
3695                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3696                               -class => $feed_class}, "OPML") . " ";
3697                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3698                               -class => $feed_class}, "TXT") . "\n";
3699         }
3700         print "</div>\n"; # class="page_footer"
3701
3702         if (defined $t0 && gitweb_check_feature('timed')) {
3703                 print "<div id=\"generating_info\">\n";
3704                 print 'This page took '.
3705                       '<span id="generating_time" class="time_span">'.
3706                       tv_interval($t0, [ gettimeofday() ]).
3707                       ' seconds </span>'.
3708                       ' and '.
3709                       '<span id="generating_cmd">'.
3710                       $number_of_git_cmds.
3711                       '</span> git commands '.
3712                       " to generate.\n";
3713                 print "</div>\n"; # class="page_footer"
3714         }
3715
3716         if (defined $site_footer && -f $site_footer) {
3717                 insert_file($site_footer);
3718         }
3719
3720         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3721         if (defined $action &&
3722             $action eq 'blame_incremental') {
3723                 print qq!<script type="text/javascript">\n!.
3724                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3725                       qq!           "!. href() .qq!");\n!.
3726                       qq!</script>\n!;
3727         } elsif (gitweb_check_feature('javascript-actions')) {
3728                 print qq!<script type="text/javascript">\n!.
3729                       qq!window.onload = fixLinks;\n!.
3730                       qq!</script>\n!;
3731         }
3732
3733         print "</body>\n" .
3734               "</html>";
3735 }
3736
3737 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3738 # Example: die_error(404, 'Hash not found')
3739 # By convention, use the following status codes (as defined in RFC 2616):
3740 # 400: Invalid or missing CGI parameters, or
3741 #      requested object exists but has wrong type.
3742 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3743 #      this server or project.
3744 # 404: Requested object/revision/project doesn't exist.
3745 # 500: The server isn't configured properly, or
3746 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3747 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3748 # 503: The server is currently unavailable (because it is overloaded,
3749 #      or down for maintenance).  Generally, this is a temporary state.
3750 sub die_error {
3751         my $status = shift || 500;
3752         my $error = esc_html(shift) || "Internal Server Error";
3753         my $extra = shift;
3754         my %opts = @_;
3755
3756         my %http_responses = (
3757                 400 => '400 Bad Request',
3758                 403 => '403 Forbidden',
3759                 404 => '404 Not Found',
3760                 500 => '500 Internal Server Error',
3761                 503 => '503 Service Unavailable',
3762         );
3763         git_header_html($http_responses{$status}, undef, %opts);
3764         print <<EOF;
3765 <div class="page_body">
3766 <br /><br />
3767 $status - $error
3768 <br />
3769 EOF
3770         if (defined $extra) {
3771                 print "<hr />\n" .
3772                       "$extra\n";
3773         }
3774         print "</div>\n";
3775
3776         git_footer_html();
3777         goto DONE_GITWEB
3778                 unless ($opts{'-error_handler'});
3779 }
3780
3781 ## ----------------------------------------------------------------------
3782 ## functions printing or outputting HTML: navigation
3783
3784 sub git_print_page_nav {
3785         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3786         $extra = '' if !defined $extra; # pager or formats
3787
3788         my @navs = qw(summary shortlog log commit commitdiff tree);
3789         if ($suppress) {
3790                 @navs = grep { $_ ne $suppress } @navs;
3791         }
3792
3793         my %arg = map { $_ => {action=>$_} } @navs;
3794         if (defined $head) {
3795                 for (qw(commit commitdiff)) {
3796                         $arg{$_}{'hash'} = $head;
3797                 }
3798                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3799                         for (qw(shortlog log)) {
3800                                 $arg{$_}{'hash'} = $head;
3801                         }
3802                 }
3803         }
3804
3805         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3806         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3807
3808         my @actions = gitweb_get_feature('actions');
3809         my %repl = (
3810                 '%' => '%',
3811                 'n' => $project,         # project name
3812                 'f' => $git_dir,         # project path within filesystem
3813                 'h' => $treehead || '',  # current hash ('h' parameter)
3814                 'b' => $treebase || '',  # hash base ('hb' parameter)
3815         );
3816         while (@actions) {
3817                 my ($label, $link, $pos) = splice(@actions,0,3);
3818                 # insert
3819                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3820                 # munch munch
3821                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3822                 $arg{$label}{'_href'} = $link;
3823         }
3824
3825         print "<div class=\"page_nav\">\n" .
3826                 (join " | ",
3827                  map { $_ eq $current ?
3828                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3829                  } @navs);
3830         print "<br/>\n$extra<br/>\n" .
3831               "</div>\n";
3832 }
3833
3834 # returns a submenu for the nagivation of the refs views (tags, heads,
3835 # remotes) with the current view disabled and the remotes view only
3836 # available if the feature is enabled
3837 sub format_ref_views {
3838         my ($current) = @_;
3839         my @ref_views = qw{tags heads};
3840         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3841         return join " | ", map {
3842                 $_ eq $current ? $_ :
3843                 $cgi->a({-href => href(action=>$_)}, $_)
3844         } @ref_views
3845 }
3846
3847 sub format_paging_nav {
3848         my ($action, $page, $has_next_link) = @_;
3849         my $paging_nav;
3850
3851
3852         if ($page > 0) {
3853                 $paging_nav .=
3854                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3855                         " &sdot; " .
3856                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3857                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3858         } else {
3859                 $paging_nav .= "first &sdot; prev";
3860         }
3861
3862         if ($has_next_link) {
3863                 $paging_nav .= " &sdot; " .
3864                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3865                                  -accesskey => "n", -title => "Alt-n"}, "next");
3866         } else {
3867                 $paging_nav .= " &sdot; next";
3868         }
3869
3870         return $paging_nav;
3871 }
3872
3873 ## ......................................................................
3874 ## functions printing or outputting HTML: div
3875
3876 sub git_print_header_div {
3877         my ($action, $title, $hash, $hash_base) = @_;
3878         my %args = ();
3879
3880         $args{'action'} = $action;
3881         $args{'hash'} = $hash if $hash;
3882         $args{'hash_base'} = $hash_base if $hash_base;
3883
3884         print "<div class=\"header\">\n" .
3885               $cgi->a({-href => href(%args), -class => "title"},
3886               $title ? $title : $action) .
3887               "\n</div>\n";
3888 }
3889
3890 sub format_repo_url {
3891         my ($name, $url) = @_;
3892         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3893 }
3894
3895 # Group output by placing it in a DIV element and adding a header.
3896 # Options for start_div() can be provided by passing a hash reference as the
3897 # first parameter to the function.
3898 # Options to git_print_header_div() can be provided by passing an array
3899 # reference. This must follow the options to start_div if they are present.
3900 # The content can be a scalar, which is output as-is, a scalar reference, which
3901 # is output after html escaping, an IO handle passed either as *handle or
3902 # *handle{IO}, or a function reference. In the latter case all following
3903 # parameters will be taken as argument to the content function call.
3904 sub git_print_section {
3905         my ($div_args, $header_args, $content);
3906         my $arg = shift;
3907         if (ref($arg) eq 'HASH') {
3908                 $div_args = $arg;
3909                 $arg = shift;
3910         }
3911         if (ref($arg) eq 'ARRAY') {
3912                 $header_args = $arg;
3913                 $arg = shift;
3914         }
3915         $content = $arg;
3916
3917         print $cgi->start_div($div_args);
3918         git_print_header_div(@$header_args);
3919
3920         if (ref($content) eq 'CODE') {
3921                 $content->(@_);
3922         } elsif (ref($content) eq 'SCALAR') {
3923                 print esc_html($$content);
3924         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3925                 print <$content>;
3926         } elsif (!ref($content) && defined($content)) {
3927                 print $content;
3928         }
3929
3930         print $cgi->end_div;
3931 }
3932
3933 sub print_local_time {
3934         print format_local_time(@_);
3935 }
3936
3937 sub format_local_time {
3938         my $localtime = '';
3939         my %date = @_;
3940         if ($date{'hour_local'} < 6) {
3941                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3942                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3943         } else {
3944                 $localtime .= sprintf(" (%02d:%02d %s)",
3945                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3946         }
3947
3948         return $localtime;
3949 }
3950
3951 # Outputs the author name and date in long form
3952 sub git_print_authorship {
3953         my $co = shift;
3954         my %opts = @_;
3955         my $tag = $opts{-tag} || 'div';
3956         my $author = $co->{'author_name'};
3957
3958         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3959         print "<$tag class=\"author_date\">" .
3960               format_search_author($author, "author", esc_html($author)) .
3961               " [$ad{'rfc2822'}";
3962         print_local_time(%ad) if ($opts{-localtime});
3963         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3964                   . "</$tag>\n";
3965 }
3966
3967 # Outputs table rows containing the full author or committer information,
3968 # in the format expected for 'commit' view (& similar).
3969 # Parameters are a commit hash reference, followed by the list of people
3970 # to output information for. If the list is empty it defaults to both
3971 # author and committer.
3972 sub git_print_authorship_rows {
3973         my $co = shift;
3974         # too bad we can't use @people = @_ || ('author', 'committer')
3975         my @people = @_;
3976         @people = ('author', 'committer') unless @people;
3977         foreach my $who (@people) {
3978                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3979                 print "<tr><td>$who</td><td>" .
3980                       format_search_author($co->{"${who}_name"}, $who,
3981                                esc_html($co->{"${who}_name"})) . " " .
3982                       format_search_author($co->{"${who}_email"}, $who,
3983                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3984                       "</td><td rowspan=\"2\">" .
3985                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3986                       "</td></tr>\n" .
3987                       "<tr>" .
3988                       "<td></td><td> $wd{'rfc2822'}";
3989                 print_local_time(%wd);
3990                 print "</td>" .
3991                       "</tr>\n";
3992         }
3993 }
3994
3995 sub git_print_page_path {
3996         my $name = shift;
3997         my $type = shift;
3998         my $hb = shift;
3999
4000
4001         print "<div class=\"page_path\">";
4002         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4003                       -title => 'tree root'}, to_utf8("[$project]"));
4004         print " / ";
4005         if (defined $name) {
4006                 my @dirname = split '/', $name;
4007                 my $basename = pop @dirname;
4008                 my $fullname = '';
4009
4010                 foreach my $dir (@dirname) {
4011                         $fullname .= ($fullname ? '/' : '') . $dir;
4012                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4013                                                      hash_base=>$hb),
4014                                       -title => $fullname}, esc_path($dir));
4015                         print " / ";
4016                 }
4017                 if (defined $type && $type eq 'blob') {
4018                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4019                                                      hash_base=>$hb),
4020                                       -title => $name}, esc_path($basename));
4021                 } elsif (defined $type && $type eq 'tree') {
4022                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4023                                                      hash_base=>$hb),
4024                                       -title => $name}, esc_path($basename));
4025                         print " / ";
4026                 } else {
4027                         print esc_path($basename);
4028                 }
4029         }
4030         print "<br/></div>\n";
4031 }
4032
4033 sub git_print_log {
4034         my $log = shift;
4035         my %opts = @_;
4036
4037         if ($opts{'-remove_title'}) {
4038                 # remove title, i.e. first line of log
4039                 shift @$log;
4040         }
4041         # remove leading empty lines
4042         while (defined $log->[0] && $log->[0] eq "") {
4043                 shift @$log;
4044         }
4045
4046         # print log
4047         my $signoff = 0;
4048         my $empty = 0;
4049         foreach my $line (@$log) {
4050                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4051                         $signoff = 1;
4052                         $empty = 0;
4053                         if (! $opts{'-remove_signoff'}) {
4054                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4055                                 next;
4056                         } else {
4057                                 # remove signoff lines
4058                                 next;
4059                         }
4060                 } else {
4061                         $signoff = 0;
4062                 }
4063
4064                 # print only one empty line
4065                 # do not print empty line after signoff
4066                 if ($line eq "") {
4067                         next if ($empty || $signoff);
4068                         $empty = 1;
4069                 } else {
4070                         $empty = 0;
4071                 }
4072
4073                 print format_log_line_html($line) . "<br/>\n";
4074         }
4075
4076         if ($opts{'-final_empty_line'}) {
4077                 # end with single empty line
4078                 print "<br/>\n" unless $empty;
4079         }
4080 }
4081
4082 # return link target (what link points to)
4083 sub git_get_link_target {
4084         my $hash = shift;
4085         my $link_target;
4086
4087         # read link
4088         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4089                 or return;
4090         {
4091                 local $/ = undef;
4092                 $link_target = <$fd>;
4093         }
4094         close $fd
4095                 or return;
4096
4097         return $link_target;
4098 }
4099
4100 # given link target, and the directory (basedir) the link is in,
4101 # return target of link relative to top directory (top tree);
4102 # return undef if it is not possible (including absolute links).
4103 sub normalize_link_target {
4104         my ($link_target, $basedir) = @_;
4105
4106         # absolute symlinks (beginning with '/') cannot be normalized
4107         return if (substr($link_target, 0, 1) eq '/');
4108
4109         # normalize link target to path from top (root) tree (dir)
4110         my $path;
4111         if ($basedir) {
4112                 $path = $basedir . '/' . $link_target;
4113         } else {
4114                 # we are in top (root) tree (dir)
4115                 $path = $link_target;
4116         }
4117
4118         # remove //, /./, and /../
4119         my @path_parts;
4120         foreach my $part (split('/', $path)) {
4121                 # discard '.' and ''
4122                 next if (!$part || $part eq '.');
4123                 # handle '..'
4124                 if ($part eq '..') {
4125                         if (@path_parts) {
4126                                 pop @path_parts;
4127                         } else {
4128                                 # link leads outside repository (outside top dir)
4129                                 return;
4130                         }
4131                 } else {
4132                         push @path_parts, $part;
4133                 }
4134         }
4135         $path = join('/', @path_parts);
4136
4137         return $path;
4138 }
4139
4140 # print tree entry (row of git_tree), but without encompassing <tr> element
4141 sub git_print_tree_entry {
4142         my ($t, $basedir, $hash_base, $have_blame) = @_;
4143
4144         my %base_key = ();
4145         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4146
4147         # The format of a table row is: mode list link.  Where mode is
4148         # the mode of the entry, list is the name of the entry, an href,
4149         # and link is the action links of the entry.
4150
4151         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4152         if (exists $t->{'size'}) {
4153                 print "<td class=\"size\">$t->{'size'}</td>\n";
4154         }
4155         if ($t->{'type'} eq "blob") {
4156                 print "<td class=\"list\">" .
4157                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4158                                                file_name=>"$basedir$t->{'name'}", %base_key),
4159                                 -class => "list"}, esc_path($t->{'name'}));
4160                 if (S_ISLNK(oct $t->{'mode'})) {
4161                         my $link_target = git_get_link_target($t->{'hash'});
4162                         if ($link_target) {
4163                                 my $norm_target = normalize_link_target($link_target, $basedir);
4164                                 if (defined $norm_target) {
4165                                         print " -> " .
4166                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4167                                                                      file_name=>$norm_target),
4168                                                        -title => $norm_target}, esc_path($link_target));
4169                                 } else {
4170                                         print " -> " . esc_path($link_target);
4171                                 }
4172                         }
4173                 }
4174                 print "</td>\n";
4175                 print "<td class=\"link\">";
4176                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4177                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4178                               "blob");
4179                 if ($have_blame) {
4180                         print " | " .
4181                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4182                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4183                                       "blame");
4184                 }
4185                 if (defined $hash_base) {
4186                         print " | " .
4187                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4188                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4189                                       "history");
4190                 }
4191                 print " | " .
4192                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4193                                                file_name=>"$basedir$t->{'name'}")},
4194                                 "raw");
4195                 print "</td>\n";
4196
4197         } elsif ($t->{'type'} eq "tree") {
4198                 print "<td class=\"list\">";
4199                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4200                                              file_name=>"$basedir$t->{'name'}",
4201                                              %base_key)},
4202                               esc_path($t->{'name'}));
4203                 print "</td>\n";
4204                 print "<td class=\"link\">";
4205                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4206                                              file_name=>"$basedir$t->{'name'}",
4207                                              %base_key)},
4208                               "tree");
4209                 if (defined $hash_base) {
4210                         print " | " .
4211                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4212                                                      file_name=>"$basedir$t->{'name'}")},
4213                                       "history");
4214                 }
4215                 print "</td>\n";
4216         } else {
4217                 # unknown object: we can only present history for it
4218                 # (this includes 'commit' object, i.e. submodule support)
4219                 print "<td class=\"list\">" .
4220                       esc_path($t->{'name'}) .
4221                       "</td>\n";
4222                 print "<td class=\"link\">";
4223                 if (defined $hash_base) {
4224                         print $cgi->a({-href => href(action=>"history",
4225                                                      hash_base=>$hash_base,
4226                                                      file_name=>"$basedir$t->{'name'}")},
4227                                       "history");
4228                 }
4229                 print "</td>\n";
4230         }
4231 }
4232
4233 ## ......................................................................
4234 ## functions printing large fragments of HTML
4235
4236 # get pre-image filenames for merge (combined) diff
4237 sub fill_from_file_info {
4238         my ($diff, @parents) = @_;
4239
4240         $diff->{'from_file'} = [ ];
4241         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4242         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4243                 if ($diff->{'status'}[$i] eq 'R' ||
4244                     $diff->{'status'}[$i] eq 'C') {
4245                         $diff->{'from_file'}[$i] =
4246                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4247                 }
4248         }
4249
4250         return $diff;
4251 }
4252
4253 # is current raw difftree line of file deletion
4254 sub is_deleted {
4255         my $diffinfo = shift;
4256
4257         return $diffinfo->{'to_id'} eq ('0' x 40);
4258 }
4259
4260 # does patch correspond to [previous] difftree raw line
4261 # $diffinfo  - hashref of parsed raw diff format
4262 # $patchinfo - hashref of parsed patch diff format
4263 #              (the same keys as in $diffinfo)
4264 sub is_patch_split {
4265         my ($diffinfo, $patchinfo) = @_;
4266
4267         return defined $diffinfo && defined $patchinfo
4268                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4269 }
4270
4271
4272 sub git_difftree_body {
4273         my ($difftree, $hash, @parents) = @_;
4274         my ($parent) = $parents[0];
4275         my $have_blame = gitweb_check_feature('blame');
4276         print "<div class=\"list_head\">\n";
4277         if ($#{$difftree} > 10) {
4278                 print(($#{$difftree} + 1) . " files changed:\n");
4279         }
4280         print "</div>\n";
4281
4282         print "<table class=\"" .
4283               (@parents > 1 ? "combined " : "") .
4284               "diff_tree\">\n";
4285
4286         # header only for combined diff in 'commitdiff' view
4287         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4288         if ($has_header) {
4289                 # table header
4290                 print "<thead><tr>\n" .
4291                        "<th></th><th></th>\n"; # filename, patchN link
4292                 for (my $i = 0; $i < @parents; $i++) {
4293                         my $par = $parents[$i];
4294                         print "<th>" .
4295                               $cgi->a({-href => href(action=>"commitdiff",
4296                                                      hash=>$hash, hash_parent=>$par),
4297                                        -title => 'commitdiff to parent number ' .
4298                                                   ($i+1) . ': ' . substr($par,0,7)},
4299                                       $i+1) .
4300                               "&nbsp;</th>\n";
4301                 }
4302                 print "</tr></thead>\n<tbody>\n";
4303         }
4304
4305         my $alternate = 1;
4306         my $patchno = 0;
4307         foreach my $line (@{$difftree}) {
4308                 my $diff = parsed_difftree_line($line);
4309
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316
4317                 if (exists $diff->{'nparents'}) { # combined diff
4318
4319                         fill_from_file_info($diff, @parents)
4320                                 unless exists $diff->{'from_file'};
4321
4322                         if (!is_deleted($diff)) {
4323                                 # file exists in the result (child) commit
4324                                 print "<td>" .
4325                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4326                                                              file_name=>$diff->{'to_file'},
4327                                                              hash_base=>$hash),
4328                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4329                                       "</td>\n";
4330                         } else {
4331                                 print "<td>" .
4332                                       esc_path($diff->{'to_file'}) .
4333                                       "</td>\n";
4334                         }
4335
4336                         if ($action eq 'commitdiff') {
4337                                 # link to patch
4338                                 $patchno++;
4339                                 print "<td class=\"link\">" .
4340                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4341                                       " | " .
4342                                       "</td>\n";
4343                         }
4344
4345                         my $has_history = 0;
4346                         my $not_deleted = 0;
4347                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4348                                 my $hash_parent = $parents[$i];
4349                                 my $from_hash = $diff->{'from_id'}[$i];
4350                                 my $from_path = $diff->{'from_file'}[$i];
4351                                 my $status = $diff->{'status'}[$i];
4352
4353                                 $has_history ||= ($status ne 'A');
4354                                 $not_deleted ||= ($status ne 'D');
4355
4356                                 if ($status eq 'A') {
4357                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4358                                 } elsif ($status eq 'D') {
4359                                         print "<td class=\"link\">" .
4360                                               $cgi->a({-href => href(action=>"blob",
4361                                                                      hash_base=>$hash,
4362                                                                      hash=>$from_hash,
4363                                                                      file_name=>$from_path)},
4364                                                       "blob" . ($i+1)) .
4365                                               " | </td>\n";
4366                                 } else {
4367                                         if ($diff->{'to_id'} eq $from_hash) {
4368                                                 print "<td class=\"link nochange\">";
4369                                         } else {
4370                                                 print "<td class=\"link\">";
4371                                         }
4372                                         print $cgi->a({-href => href(action=>"blobdiff",
4373                                                                      hash=>$diff->{'to_id'},
4374                                                                      hash_parent=>$from_hash,
4375                                                                      hash_base=>$hash,
4376                                                                      hash_parent_base=>$hash_parent,
4377                                                                      file_name=>$diff->{'to_file'},
4378                                                                      file_parent=>$from_path)},
4379                                                       "diff" . ($i+1)) .
4380                                               " | </td>\n";
4381                                 }
4382                         }
4383
4384                         print "<td class=\"link\">";
4385                         if ($not_deleted) {
4386                                 print $cgi->a({-href => href(action=>"blob",
4387                                                              hash=>$diff->{'to_id'},
4388                                                              file_name=>$diff->{'to_file'},
4389                                                              hash_base=>$hash)},
4390                                               "blob");
4391                                 print " | " if ($has_history);
4392                         }
4393                         if ($has_history) {
4394                                 print $cgi->a({-href => href(action=>"history",
4395                                                              file_name=>$diff->{'to_file'},
4396                                                              hash_base=>$hash)},
4397                                               "history");
4398                         }
4399                         print "</td>\n";
4400
4401                         print "</tr>\n";
4402                         next; # instead of 'else' clause, to avoid extra indent
4403                 }
4404                 # else ordinary diff
4405
4406                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4407                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4408                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4409                         $to_mode_oct = oct $diff->{'to_mode'};
4410                         if (S_ISREG($to_mode_oct)) { # only for regular file
4411                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4412                         }
4413                         $to_file_type = file_type($diff->{'to_mode'});
4414                 }
4415                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4416                         $from_mode_oct = oct $diff->{'from_mode'};
4417                         if (S_ISREG($to_mode_oct)) { # only for regular file
4418                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4419                         }
4420                         $from_file_type = file_type($diff->{'from_mode'});
4421                 }
4422
4423                 if ($diff->{'status'} eq "A") { # created
4424                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4425                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4426                         $mode_chng   .= "]</span>";
4427                         print "<td>";
4428                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4429                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4430                                       -class => "list"}, esc_path($diff->{'file'}));
4431                         print "</td>\n";
4432                         print "<td>$mode_chng</td>\n";
4433                         print "<td class=\"link\">";
4434                         if ($action eq 'commitdiff') {
4435                                 # link to patch
4436                                 $patchno++;
4437                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4438                                 print " | ";
4439                         }
4440                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4441                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4442                                       "blob");
4443                         print "</td>\n";
4444
4445                 } elsif ($diff->{'status'} eq "D") { # deleted
4446                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4447                         print "<td>";
4448                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4449                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4450                                        -class => "list"}, esc_path($diff->{'file'}));
4451                         print "</td>\n";
4452                         print "<td>$mode_chng</td>\n";
4453                         print "<td class=\"link\">";
4454                         if ($action eq 'commitdiff') {
4455                                 # link to patch
4456                                 $patchno++;
4457                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4458                                 print " | ";
4459                         }
4460                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4461                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4462                                       "blob") . " | ";
4463                         if ($have_blame) {
4464                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4465                                                              file_name=>$diff->{'file'})},
4466                                               "blame") . " | ";
4467                         }
4468                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4469                                                      file_name=>$diff->{'file'})},
4470                                       "history");
4471                         print "</td>\n";
4472
4473                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4474                         my $mode_chnge = "";
4475                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4476                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4477                                 if ($from_file_type ne $to_file_type) {
4478                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4479                                 }
4480                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4481                                         if ($from_mode_str && $to_mode_str) {
4482                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4483                                         } elsif ($to_mode_str) {
4484                                                 $mode_chnge .= " mode: $to_mode_str";
4485                                         }
4486                                 }
4487                                 $mode_chnge .= "]</span>\n";
4488                         }
4489                         print "<td>";
4490                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4491                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4492                                       -class => "list"}, esc_path($diff->{'file'}));
4493                         print "</td>\n";
4494                         print "<td>$mode_chnge</td>\n";
4495                         print "<td class=\"link\">";
4496                         if ($action eq 'commitdiff') {
4497                                 # link to patch
4498                                 $patchno++;
4499                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4500                                       " | ";
4501                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4502                                 # "commit" view and modified file (not onlu mode changed)
4503                                 print $cgi->a({-href => href(action=>"blobdiff",
4504                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4505                                                              hash_base=>$hash, hash_parent_base=>$parent,
4506                                                              file_name=>$diff->{'file'})},
4507                                               "diff") .
4508                                       " | ";
4509                         }
4510                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4511                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4512                                        "blob") . " | ";
4513                         if ($have_blame) {
4514                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4515                                                              file_name=>$diff->{'file'})},
4516                                               "blame") . " | ";
4517                         }
4518                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4519                                                      file_name=>$diff->{'file'})},
4520                                       "history");
4521                         print "</td>\n";
4522
4523                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4524                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4525                         my $nstatus = $status_name{$diff->{'status'}};
4526                         my $mode_chng = "";
4527                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4528                                 # mode also for directories, so we cannot use $to_mode_str
4529                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4530                         }
4531                         print "<td>" .
4532                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4533                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4534                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4535                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4536                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4537                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4538                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4539                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4540                               "<td class=\"link\">";
4541                         if ($action eq 'commitdiff') {
4542                                 # link to patch
4543                                 $patchno++;
4544                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4545                                       " | ";
4546                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4547                                 # "commit" view and modified file (not only pure rename or copy)
4548                                 print $cgi->a({-href => href(action=>"blobdiff",
4549                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4550                                                              hash_base=>$hash, hash_parent_base=>$parent,
4551                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4552                                               "diff") .
4553                                       " | ";
4554                         }
4555                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4556                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4557                                       "blob") . " | ";
4558                         if ($have_blame) {
4559                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4560                                                              file_name=>$diff->{'to_file'})},
4561                                               "blame") . " | ";
4562                         }
4563                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4564                                                     file_name=>$diff->{'to_file'})},
4565                                       "history");
4566                         print "</td>\n";
4567
4568                 } # we should not encounter Unmerged (U) or Unknown (X) status
4569                 print "</tr>\n";
4570         }
4571         print "</tbody>" if $has_header;
4572         print "</table>\n";
4573 }
4574
4575 sub git_patchset_body {
4576         my ($fd, $difftree, $hash, @hash_parents) = @_;
4577         my ($hash_parent) = $hash_parents[0];
4578
4579         my $is_combined = (@hash_parents > 1);
4580         my $patch_idx = 0;
4581         my $patch_number = 0;
4582         my $patch_line;
4583         my $diffinfo;
4584         my $to_name;
4585         my (%from, %to);
4586
4587         print "<div class=\"patchset\">\n";
4588
4589         # skip to first patch
4590         while ($patch_line = <$fd>) {
4591                 chomp $patch_line;
4592
4593                 last if ($patch_line =~ m/^diff /);
4594         }
4595
4596  PATCH:
4597         while ($patch_line) {
4598
4599                 # parse "git diff" header line
4600                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4601                         # $1 is from_name, which we do not use
4602                         $to_name = unquote($2);
4603                         $to_name =~ s!^b/!!;
4604                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4605                         # $1 is 'cc' or 'combined', which we do not use
4606                         $to_name = unquote($2);
4607                 } else {
4608                         $to_name = undef;
4609                 }
4610
4611                 # check if current patch belong to current raw line
4612                 # and parse raw git-diff line if needed
4613                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4614                         # this is continuation of a split patch
4615                         print "<div class=\"patch cont\">\n";
4616                 } else {
4617                         # advance raw git-diff output if needed
4618                         $patch_idx++ if defined $diffinfo;
4619
4620                         # read and prepare patch information
4621                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4622
4623                         # compact combined diff output can have some patches skipped
4624                         # find which patch (using pathname of result) we are at now;
4625                         if ($is_combined) {
4626                                 while ($to_name ne $diffinfo->{'to_file'}) {
4627                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4628                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4629                                               "</div>\n";  # class="patch"
4630
4631                                         $patch_idx++;
4632                                         $patch_number++;
4633
4634                                         last if $patch_idx > $#$difftree;
4635                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4636                                 }
4637                         }
4638
4639                         # modifies %from, %to hashes
4640                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4641
4642                         # this is first patch for raw difftree line with $patch_idx index
4643                         # we index @$difftree array from 0, but number patches from 1
4644                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4645                 }
4646
4647                 # git diff header
4648                 #assert($patch_line =~ m/^diff /) if DEBUG;
4649                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4650                 $patch_number++;
4651                 # print "git diff" header
4652                 print format_git_diff_header_line($patch_line, $diffinfo,
4653                                                   \%from, \%to);
4654
4655                 # print extended diff header
4656                 print "<div class=\"diff extended_header\">\n";
4657         EXTENDED_HEADER:
4658                 while ($patch_line = <$fd>) {
4659                         chomp $patch_line;
4660
4661                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4662
4663                         print format_extended_diff_header_line($patch_line, $diffinfo,
4664                                                                \%from, \%to);
4665                 }
4666                 print "</div>\n"; # class="diff extended_header"
4667
4668                 # from-file/to-file diff header
4669                 if (! $patch_line) {
4670                         print "</div>\n"; # class="patch"
4671                         last PATCH;
4672                 }
4673                 next PATCH if ($patch_line =~ m/^diff /);
4674                 #assert($patch_line =~ m/^---/) if DEBUG;
4675
4676                 my $last_patch_line = $patch_line;
4677                 $patch_line = <$fd>;
4678                 chomp $patch_line;
4679                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4680
4681                 print format_diff_from_to_header($last_patch_line, $patch_line,
4682                                                  $diffinfo, \%from, \%to,
4683                                                  @hash_parents);
4684
4685                 # the patch itself
4686         LINE:
4687                 while ($patch_line = <$fd>) {
4688                         chomp $patch_line;
4689
4690                         next PATCH if ($patch_line =~ m/^diff /);
4691
4692                         print format_diff_line($patch_line, \%from, \%to);
4693                 }
4694
4695         } continue {
4696                 print "</div>\n"; # class="patch"
4697         }
4698
4699         # for compact combined (--cc) format, with chunk and patch simplification
4700         # the patchset might be empty, but there might be unprocessed raw lines
4701         for (++$patch_idx if $patch_number > 0;
4702              $patch_idx < @$difftree;
4703              ++$patch_idx) {
4704                 # read and prepare patch information
4705                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4706
4707                 # generate anchor for "patch" links in difftree / whatchanged part
4708                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4709                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4710                       "</div>\n";  # class="patch"
4711
4712                 $patch_number++;
4713         }
4714
4715         if ($patch_number == 0) {
4716                 if (@hash_parents > 1) {
4717                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4718                 } else {
4719                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4720                 }
4721         }
4722
4723         print "</div>\n"; # class="patchset"
4724 }
4725
4726 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4727
4728 # fills project list info (age, description, owner, forks) for each
4729 # project in the list, removing invalid projects from returned list
4730 # NOTE: modifies $projlist, but does not remove entries from it
4731 sub fill_project_list_info {
4732         my ($projlist, $check_forks) = @_;
4733         my @projects;
4734
4735         my $show_ctags = gitweb_check_feature('ctags');
4736  PROJECT:
4737         foreach my $pr (@$projlist) {
4738                 my (@activity) = git_get_last_activity($pr->{'path'});
4739                 unless (@activity) {
4740                         next PROJECT;
4741                 }
4742                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4743                 if (!defined $pr->{'descr'}) {
4744                         my $descr = git_get_project_description($pr->{'path'}) || "";
4745                         $descr = to_utf8($descr);
4746                         $pr->{'descr_long'} = $descr;
4747                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4748                 }
4749                 if (!defined $pr->{'owner'}) {
4750                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4751                 }
4752                 if ($check_forks) {
4753                         my $pname = $pr->{'path'};
4754                         if (($pname =~ s/\.git$//) &&
4755                             ($pname !~ /\/$/) &&
4756                             (-d "$projectroot/$pname")) {
4757                                 $pr->{'forks'} = "-d $projectroot/$pname";
4758                         } else {
4759                                 $pr->{'forks'} = 0;
4760                         }
4761                 }
4762                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4763                 push @projects, $pr;
4764         }
4765
4766         return @projects;
4767 }
4768
4769 # print 'sort by' <th> element, generating 'sort by $name' replay link
4770 # if that order is not selected
4771 sub print_sort_th {
4772         print format_sort_th(@_);
4773 }
4774
4775 sub format_sort_th {
4776         my ($name, $order, $header) = @_;
4777         my $sort_th = "";
4778         $header ||= ucfirst($name);
4779
4780         if ($order eq $name) {
4781                 $sort_th .= "<th>$header</th>\n";
4782         } else {
4783                 $sort_th .= "<th>" .
4784                             $cgi->a({-href => href(-replay=>1, order=>$name),
4785                                      -class => "header"}, $header) .
4786                             "</th>\n";
4787         }
4788
4789         return $sort_th;
4790 }
4791
4792 sub git_project_list_body {
4793         # actually uses global variable $project
4794         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4795
4796         my $check_forks = gitweb_check_feature('forks');
4797         my @projects = fill_project_list_info($projlist, $check_forks);
4798
4799         $order ||= $default_projects_order;
4800         $from = 0 unless defined $from;
4801         $to = $#projects if (!defined $to || $#projects < $to);
4802
4803         my %order_info = (
4804                 project => { key => 'path', type => 'str' },
4805                 descr => { key => 'descr_long', type => 'str' },
4806                 owner => { key => 'owner', type => 'str' },
4807                 age => { key => 'age', type => 'num' }
4808         );
4809         my $oi = $order_info{$order};
4810         if ($oi->{'type'} eq 'str') {
4811                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4812         } else {
4813                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4814         }
4815
4816         my $show_ctags = gitweb_check_feature('ctags');
4817         if ($show_ctags) {
4818                 my %ctags;
4819                 foreach my $p (@projects) {
4820                         foreach my $ct (keys %{$p->{'ctags'}}) {
4821                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4822                         }
4823                 }
4824                 my $cloud = git_populate_project_tagcloud(\%ctags);
4825                 print git_show_project_tagcloud($cloud, 64);
4826         }
4827
4828         print "<table class=\"project_list\">\n";
4829         unless ($no_header) {
4830                 print "<tr>\n";
4831                 if ($check_forks) {
4832                         print "<th></th>\n";
4833                 }
4834                 print_sort_th('project', $order, 'Project');
4835                 print_sort_th('descr', $order, 'Description');
4836                 print_sort_th('owner', $order, 'Owner');
4837                 print_sort_th('age', $order, 'Last Change');
4838                 print "<th></th>\n" . # for links
4839                       "</tr>\n";
4840         }
4841         my $alternate = 1;
4842         my $tagfilter = $cgi->param('by_tag');
4843         for (my $i = $from; $i <= $to; $i++) {
4844                 my $pr = $projects[$i];
4845
4846                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4847                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4848                         and not $pr->{'descr_long'} =~ /$searchtext/;
4849                 # Weed out forks or non-matching entries of search
4850                 if ($check_forks) {
4851                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4852                         $forkbase="^$forkbase" if $forkbase;
4853                         next if not $searchtext and not $tagfilter and $show_ctags
4854                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4855                 }
4856
4857                 if ($alternate) {
4858                         print "<tr class=\"dark\">\n";
4859                 } else {
4860                         print "<tr class=\"light\">\n";
4861                 }
4862                 $alternate ^= 1;
4863                 if ($check_forks) {
4864                         print "<td>";
4865                         if ($pr->{'forks'}) {
4866                                 print "<!-- $pr->{'forks'} -->\n";
4867                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4868                         }
4869                         print "</td>\n";
4870                 }
4871                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4872                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4873                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4874                                         -class => "list", -title => $pr->{'descr_long'}},
4875                                         esc_html($pr->{'descr'})) . "</td>\n" .
4876                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4877                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4878                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4879                       "<td class=\"link\">" .
4880                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4881                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4882                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4883                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4884                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4885                       "</td>\n" .
4886                       "</tr>\n";
4887         }
4888         if (defined $extra) {
4889                 print "<tr>\n";
4890                 if ($check_forks) {
4891                         print "<td></td>\n";
4892                 }
4893                 print "<td colspan=\"5\">$extra</td>\n" .
4894                       "</tr>\n";
4895         }
4896         print "</table>\n";
4897 }
4898
4899 sub git_log_body {
4900         # uses global variable $project
4901         my ($commitlist, $from, $to, $refs, $extra) = @_;
4902
4903         $from = 0 unless defined $from;
4904         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4905
4906         for (my $i = 0; $i <= $to; $i++) {
4907                 my %co = %{$commitlist->[$i]};
4908                 next if !%co;
4909                 my $commit = $co{'id'};
4910                 my $ref = format_ref_marker($refs, $commit);
4911                 my %ad = parse_date($co{'author_epoch'});
4912                 git_print_header_div('commit',
4913                                "<span class=\"age\">$co{'age_string'}</span>" .
4914                                esc_html($co{'title'}) . $ref,
4915                                $commit);
4916                 print "<div class=\"title_text\">\n" .
4917                       "<div class=\"log_link\">\n" .
4918                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4919                       " | " .
4920                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4921                       " | " .
4922                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4923                       "<br/>\n" .
4924                       "</div>\n";
4925                       git_print_authorship(\%co, -tag => 'span');
4926                       print "<br/>\n</div>\n";
4927
4928                 print "<div class=\"log_body\">\n";
4929                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4930                 print "</div>\n";
4931         }
4932         if ($extra) {
4933                 print "<div class=\"page_nav\">\n";
4934                 print "$extra\n";
4935                 print "</div>\n";
4936         }
4937 }
4938
4939 sub git_shortlog_body {
4940         # uses global variable $project
4941         my ($commitlist, $from, $to, $refs, $extra) = @_;
4942
4943         $from = 0 unless defined $from;
4944         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4945
4946         print "<table class=\"shortlog\">\n";
4947         my $alternate = 1;
4948         for (my $i = $from; $i <= $to; $i++) {
4949                 my %co = %{$commitlist->[$i]};
4950                 my $commit = $co{'id'};
4951                 my $ref = format_ref_marker($refs, $commit);
4952                 if ($alternate) {
4953                         print "<tr class=\"dark\">\n";
4954                 } else {
4955                         print "<tr class=\"light\">\n";
4956                 }
4957                 $alternate ^= 1;
4958                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4959                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4960                       format_author_html('td', \%co, 10) . "<td>";
4961                 print format_subject_html($co{'title'}, $co{'title_short'},
4962                                           href(action=>"commit", hash=>$commit), $ref);
4963                 print "</td>\n" .
4964                       "<td class=\"link\">" .
4965                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4966                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4967                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4968                 my $snapshot_links = format_snapshot_links($commit);
4969                 if (defined $snapshot_links) {
4970                         print " | " . $snapshot_links;
4971                 }
4972                 print "</td>\n" .
4973                       "</tr>\n";
4974         }
4975         if (defined $extra) {
4976                 print "<tr>\n" .
4977                       "<td colspan=\"4\">$extra</td>\n" .
4978                       "</tr>\n";
4979         }
4980         print "</table>\n";
4981 }
4982
4983 sub git_history_body {
4984         # Warning: assumes constant type (blob or tree) during history
4985         my ($commitlist, $from, $to, $refs, $extra,
4986             $file_name, $file_hash, $ftype) = @_;
4987
4988         $from = 0 unless defined $from;
4989         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4990
4991         print "<table class=\"history\">\n";
4992         my $alternate = 1;
4993         for (my $i = $from; $i <= $to; $i++) {
4994                 my %co = %{$commitlist->[$i]};
4995                 if (!%co) {
4996                         next;
4997                 }
4998                 my $commit = $co{'id'};
4999
5000                 my $ref = format_ref_marker($refs, $commit);
5001
5002                 if ($alternate) {
5003                         print "<tr class=\"dark\">\n";
5004                 } else {
5005                         print "<tr class=\"light\">\n";
5006                 }
5007                 $alternate ^= 1;
5008                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5009         # shortlog:   format_author_html('td', \%co, 10)
5010                       format_author_html('td', \%co, 15, 3) . "<td>";
5011                 # originally git_history used chop_str($co{'title'}, 50)
5012                 print format_subject_html($co{'title'}, $co{'title_short'},
5013                                           href(action=>"commit", hash=>$commit), $ref);
5014                 print "</td>\n" .
5015                       "<td class=\"link\">" .
5016                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5017                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5018
5019                 if ($ftype eq 'blob') {
5020                         my $blob_current = $file_hash;
5021                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5022                         if (defined $blob_current && defined $blob_parent &&
5023                                         $blob_current ne $blob_parent) {
5024                                 print " | " .
5025                                         $cgi->a({-href => href(action=>"blobdiff",
5026                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5027                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5028                                                                file_name=>$file_name)},
5029                                                 "diff to current");
5030                         }
5031                 }
5032                 print "</td>\n" .
5033                       "</tr>\n";
5034         }
5035         if (defined $extra) {
5036                 print "<tr>\n" .
5037                       "<td colspan=\"4\">$extra</td>\n" .
5038                       "</tr>\n";
5039         }
5040         print "</table>\n";
5041 }
5042
5043 sub git_tags_body {
5044         # uses global variable $project
5045         my ($taglist, $from, $to, $extra) = @_;
5046         $from = 0 unless defined $from;
5047         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5048
5049         print "<table class=\"tags\">\n";
5050         my $alternate = 1;
5051         for (my $i = $from; $i <= $to; $i++) {
5052                 my $entry = $taglist->[$i];
5053                 my %tag = %$entry;
5054                 my $comment = $tag{'subject'};
5055                 my $comment_short;
5056                 if (defined $comment) {
5057                         $comment_short = chop_str($comment, 30, 5);
5058                 }
5059                 if ($alternate) {
5060                         print "<tr class=\"dark\">\n";
5061                 } else {
5062                         print "<tr class=\"light\">\n";
5063                 }
5064                 $alternate ^= 1;
5065                 if (defined $tag{'age'}) {
5066                         print "<td><i>$tag{'age'}</i></td>\n";
5067                 } else {
5068                         print "<td></td>\n";
5069                 }
5070                 print "<td>" .
5071                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5072                                -class => "list name"}, esc_html($tag{'name'})) .
5073                       "</td>\n" .
5074                       "<td>";
5075                 if (defined $comment) {
5076                         print format_subject_html($comment, $comment_short,
5077                                                   href(action=>"tag", hash=>$tag{'id'}));
5078                 }
5079                 print "</td>\n" .
5080                       "<td class=\"selflink\">";
5081                 if ($tag{'type'} eq "tag") {
5082                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5083                 } else {
5084                         print "&nbsp;";
5085                 }
5086                 print "</td>\n" .
5087                       "<td class=\"link\">" . " | " .
5088                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5089                 if ($tag{'reftype'} eq "commit") {
5090                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5091                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5092                 } elsif ($tag{'reftype'} eq "blob") {
5093                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5094                 }
5095                 print "</td>\n" .
5096                       "</tr>";
5097         }
5098         if (defined $extra) {
5099                 print "<tr>\n" .
5100                       "<td colspan=\"5\">$extra</td>\n" .
5101                       "</tr>\n";
5102         }
5103         print "</table>\n";
5104 }
5105
5106 sub git_heads_body {
5107         # uses global variable $project
5108         my ($headlist, $head, $from, $to, $extra) = @_;
5109         $from = 0 unless defined $from;
5110         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5111
5112         print "<table class=\"heads\">\n";
5113         my $alternate = 1;
5114         for (my $i = $from; $i <= $to; $i++) {
5115                 my $entry = $headlist->[$i];
5116                 my %ref = %$entry;
5117                 my $curr = $ref{'id'} eq $head;
5118                 if ($alternate) {
5119                         print "<tr class=\"dark\">\n";
5120                 } else {
5121                         print "<tr class=\"light\">\n";
5122                 }
5123                 $alternate ^= 1;
5124                 print "<td><i>$ref{'age'}</i></td>\n" .
5125                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5126                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5127                                -class => "list name"},esc_html($ref{'name'})) .
5128                       "</td>\n" .
5129                       "<td class=\"link\">" .
5130                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5131                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5132                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5133                       "</td>\n" .
5134                       "</tr>";
5135         }
5136         if (defined $extra) {
5137                 print "<tr>\n" .
5138                       "<td colspan=\"3\">$extra</td>\n" .
5139                       "</tr>\n";
5140         }
5141         print "</table>\n";
5142 }
5143
5144 # Display a single remote block
5145 sub git_remote_block {
5146         my ($remote, $rdata, $limit, $head) = @_;
5147
5148         my $heads = $rdata->{'heads'};
5149         my $fetch = $rdata->{'fetch'};
5150         my $push = $rdata->{'push'};
5151
5152         my $urls_table = "<table class=\"projects_list\">\n" ;
5153
5154         if (defined $fetch) {
5155                 if ($fetch eq $push) {
5156                         $urls_table .= format_repo_url("URL", $fetch);
5157                 } else {
5158                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5159                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5160                 }
5161         } elsif (defined $push) {
5162                 $urls_table .= format_repo_url("Push URL", $push);
5163         } else {
5164                 $urls_table .= format_repo_url("", "No remote URL");
5165         }
5166
5167         $urls_table .= "</table>\n";
5168
5169         my $dots;
5170         if (defined $limit && $limit < @$heads) {
5171                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5172         }
5173
5174         print $urls_table;
5175         git_heads_body($heads, $head, 0, $limit, $dots);
5176 }
5177
5178 # Display a list of remote names with the respective fetch and push URLs
5179 sub git_remotes_list {
5180         my ($remotedata, $limit) = @_;
5181         print "<table class=\"heads\">\n";
5182         my $alternate = 1;
5183         my @remotes = sort keys %$remotedata;
5184
5185         my $limited = $limit && $limit < @remotes;
5186
5187         $#remotes = $limit - 1 if $limited;
5188
5189         while (my $remote = shift @remotes) {
5190                 my $rdata = $remotedata->{$remote};
5191                 my $fetch = $rdata->{'fetch'};
5192                 my $push = $rdata->{'push'};
5193                 if ($alternate) {
5194                         print "<tr class=\"dark\">\n";
5195                 } else {
5196                         print "<tr class=\"light\">\n";
5197                 }
5198                 $alternate ^= 1;
5199                 print "<td>" .
5200                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5201                                -class=> "list name"},esc_html($remote)) .
5202                       "</td>";
5203                 print "<td class=\"link\">" .
5204                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5205                       " | " .
5206                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5207                       "</td>";
5208
5209                 print "</tr>\n";
5210         }
5211
5212         if ($limited) {
5213                 print "<tr>\n" .
5214                       "<td colspan=\"3\">" .
5215                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5216                       "</td>\n" . "</tr>\n";
5217         }
5218
5219         print "</table>";
5220 }
5221
5222 # Display remote heads grouped by remote, unless there are too many
5223 # remotes, in which case we only display the remote names
5224 sub git_remotes_body {
5225         my ($remotedata, $limit, $head) = @_;
5226         if ($limit and $limit < keys %$remotedata) {
5227                 git_remotes_list($remotedata, $limit);
5228         } else {
5229                 fill_remote_heads($remotedata);
5230                 while (my ($remote, $rdata) = each %$remotedata) {
5231                         git_print_section({-class=>"remote", -id=>$remote},
5232                                 ["remotes", $remote, $remote], sub {
5233                                         git_remote_block($remote, $rdata, $limit, $head);
5234                                 });
5235                 }
5236         }
5237 }
5238
5239 sub git_search_grep_body {
5240         my ($commitlist, $from, $to, $extra) = @_;
5241         $from = 0 unless defined $from;
5242         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5243
5244         print "<table class=\"commit_search\">\n";
5245         my $alternate = 1;
5246         for (my $i = $from; $i <= $to; $i++) {
5247                 my %co = %{$commitlist->[$i]};
5248                 if (!%co) {
5249                         next;
5250                 }
5251                 my $commit = $co{'id'};
5252                 if ($alternate) {
5253                         print "<tr class=\"dark\">\n";
5254                 } else {
5255                         print "<tr class=\"light\">\n";
5256                 }
5257                 $alternate ^= 1;
5258                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5259                       format_author_html('td', \%co, 15, 5) .
5260                       "<td>" .
5261                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5262                                -class => "list subject"},
5263                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5264                 my $comment = $co{'comment'};
5265                 foreach my $line (@$comment) {
5266                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5267                                 my ($lead, $match, $trail) = ($1, $2, $3);
5268                                 $match = chop_str($match, 70, 5, 'center');
5269                                 my $contextlen = int((80 - length($match))/2);
5270                                 $contextlen = 30 if ($contextlen > 30);
5271                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5272                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5273
5274                                 $lead  = esc_html($lead);
5275                                 $match = esc_html($match);
5276                                 $trail = esc_html($trail);
5277
5278                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5279                         }
5280                 }
5281                 print "</td>\n" .
5282                       "<td class=\"link\">" .
5283                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5284                       " | " .
5285                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5286                       " | " .
5287                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5288                 print "</td>\n" .
5289                       "</tr>\n";
5290         }
5291         if (defined $extra) {
5292                 print "<tr>\n" .
5293                       "<td colspan=\"3\">$extra</td>\n" .
5294                       "</tr>\n";
5295         }
5296         print "</table>\n";
5297 }
5298
5299 ## ======================================================================
5300 ## ======================================================================
5301 ## actions
5302
5303 sub git_project_list {
5304         my $order = $input_params{'order'};
5305         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5306                 die_error(400, "Unknown order parameter");
5307         }
5308
5309         my @list = git_get_projects_list();
5310         if (!@list) {
5311                 die_error(404, "No projects found");
5312         }
5313
5314         git_header_html();
5315         if (defined $home_text && -f $home_text) {
5316                 print "<div class=\"index_include\">\n";
5317                 insert_file($home_text);
5318                 print "</div>\n";
5319         }
5320         print $cgi->startform(-method => "get") .
5321               "<p class=\"projsearch\">Search:\n" .
5322               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5323               "</p>" .
5324               $cgi->end_form() . "\n";
5325         git_project_list_body(\@list, $order);
5326         git_footer_html();
5327 }
5328
5329 sub git_forks {
5330         my $order = $input_params{'order'};
5331         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5332                 die_error(400, "Unknown order parameter");
5333         }
5334
5335         my @list = git_get_projects_list($project);
5336         if (!@list) {
5337                 die_error(404, "No forks found");
5338         }
5339
5340         git_header_html();
5341         git_print_page_nav('','');
5342         git_print_header_div('summary', "$project forks");
5343         git_project_list_body(\@list, $order);
5344         git_footer_html();
5345 }
5346
5347 sub git_project_index {
5348         my @projects = git_get_projects_list($project);
5349
5350         print $cgi->header(
5351                 -type => 'text/plain',
5352                 -charset => 'utf-8',
5353                 -content_disposition => 'inline; filename="index.aux"');
5354
5355         foreach my $pr (@projects) {
5356                 if (!exists $pr->{'owner'}) {
5357                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5358                 }
5359
5360                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5361                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5362                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5363                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5364                 $path  =~ s/ /\+/g;
5365                 $owner =~ s/ /\+/g;
5366
5367                 print "$path $owner\n";
5368         }
5369 }
5370
5371 sub git_summary {
5372         my $descr = git_get_project_description($project) || "none";
5373         my %co = parse_commit("HEAD");
5374         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5375         my $head = $co{'id'};
5376         my $remote_heads = gitweb_check_feature('remote_heads');
5377
5378         my $owner = git_get_project_owner($project);
5379
5380         my $refs = git_get_references();
5381         # These get_*_list functions return one more to allow us to see if
5382         # there are more ...
5383         my @taglist  = git_get_tags_list(16);
5384         my @headlist = git_get_heads_list(16);
5385         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5386         my @forklist;
5387         my $check_forks = gitweb_check_feature('forks');
5388
5389         if ($check_forks) {
5390                 @forklist = git_get_projects_list($project);
5391         }
5392
5393         git_header_html();
5394         git_print_page_nav('summary','', $head);
5395
5396         print "<div class=\"title\">&nbsp;</div>\n";
5397         print "<table class=\"projects_list\">\n" .
5398               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5399               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5400         if (defined $cd{'rfc2822'}) {
5401                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5402         }
5403
5404         # use per project git URL list in $projectroot/$project/cloneurl
5405         # or make project git URL from git base URL and project name
5406         my $url_tag = "URL";
5407         my @url_list = git_get_project_url_list($project);
5408         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5409         foreach my $git_url (@url_list) {
5410                 next unless $git_url;
5411                 print format_repo_url($url_tag, $git_url);
5412                 $url_tag = "";
5413         }
5414
5415         # Tag cloud
5416         my $show_ctags = gitweb_check_feature('ctags');
5417         if ($show_ctags) {
5418                 my $ctags = git_get_project_ctags($project);
5419                 my $cloud = git_populate_project_tagcloud($ctags);
5420                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5421                 print "</td>\n<td>" unless %$ctags;
5422                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5423                 print "</td>\n<td>" if %$ctags;
5424                 print git_show_project_tagcloud($cloud, 48);
5425                 print "</td></tr>";
5426         }
5427
5428         print "</table>\n";
5429
5430         # If XSS prevention is on, we don't include README.html.
5431         # TODO: Allow a readme in some safe format.
5432         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5433                 print "<div class=\"title\">readme</div>\n" .
5434                       "<div class=\"readme\">\n";
5435                 insert_file("$projectroot/$project/README.html");
5436                 print "\n</div>\n"; # class="readme"
5437         }
5438
5439         # we need to request one more than 16 (0..15) to check if
5440         # those 16 are all
5441         my @commitlist = $head ? parse_commits($head, 17) : ();
5442         if (@commitlist) {
5443                 git_print_header_div('shortlog');
5444                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5445                                   $#commitlist <=  15 ? undef :
5446                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5447         }
5448
5449         if (@taglist) {
5450                 git_print_header_div('tags');
5451                 git_tags_body(\@taglist, 0, 15,
5452                               $#taglist <=  15 ? undef :
5453                               $cgi->a({-href => href(action=>"tags")}, "..."));
5454         }
5455
5456         if (@headlist) {
5457                 git_print_header_div('heads');
5458                 git_heads_body(\@headlist, $head, 0, 15,
5459                                $#headlist <= 15 ? undef :
5460                                $cgi->a({-href => href(action=>"heads")}, "..."));
5461         }
5462
5463         if (%remotedata) {
5464                 git_print_header_div('remotes');
5465                 git_remotes_body(\%remotedata, 15, $head);
5466         }
5467
5468         if (@forklist) {
5469                 git_print_header_div('forks');
5470                 git_project_list_body(\@forklist, 'age', 0, 15,
5471                                       $#forklist <= 15 ? undef :
5472                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5473                                       'no_header');
5474         }
5475
5476         git_footer_html();
5477 }
5478
5479 sub git_tag {
5480         my %tag = parse_tag($hash);
5481
5482         if (! %tag) {
5483                 die_error(404, "Unknown tag object");
5484         }
5485
5486         my $head = git_get_head_hash($project);
5487         git_header_html();
5488         git_print_page_nav('','', $head,undef,$head);
5489         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5490         print "<div class=\"title_text\">\n" .
5491               "<table class=\"object_header\">\n" .
5492               "<tr>\n" .
5493               "<td>object</td>\n" .
5494               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5495                                $tag{'object'}) . "</td>\n" .
5496               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5497                                               $tag{'type'}) . "</td>\n" .
5498               "</tr>\n";
5499         if (defined($tag{'author'})) {
5500                 git_print_authorship_rows(\%tag, 'author');
5501         }
5502         print "</table>\n\n" .
5503               "</div>\n";
5504         print "<div class=\"page_body\">";
5505         my $comment = $tag{'comment'};
5506         foreach my $line (@$comment) {
5507                 chomp $line;
5508                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5509         }
5510         print "</div>\n";
5511         git_footer_html();
5512 }
5513
5514 sub git_blame_common {
5515         my $format = shift || 'porcelain';
5516         if ($format eq 'porcelain' && $cgi->param('js')) {
5517                 $format = 'incremental';
5518                 $action = 'blame_incremental'; # for page title etc
5519         }
5520
5521         # permissions
5522         gitweb_check_feature('blame')
5523                 or die_error(403, "Blame view not allowed");
5524
5525         # error checking
5526         die_error(400, "No file name given") unless $file_name;
5527         $hash_base ||= git_get_head_hash($project);
5528         die_error(404, "Couldn't find base commit") unless $hash_base;
5529         my %co = parse_commit($hash_base)
5530                 or die_error(404, "Commit not found");
5531         my $ftype = "blob";
5532         if (!defined $hash) {
5533                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5534                         or die_error(404, "Error looking up file");
5535         } else {
5536                 $ftype = git_get_type($hash);
5537                 if ($ftype !~ "blob") {
5538                         die_error(400, "Object is not a blob");
5539                 }
5540         }
5541
5542         my $fd;
5543         if ($format eq 'incremental') {
5544                 # get file contents (as base)
5545                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5546                         or die_error(500, "Open git-cat-file failed");
5547         } elsif ($format eq 'data') {
5548                 # run git-blame --incremental
5549                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5550                         $hash_base, "--", $file_name
5551                         or die_error(500, "Open git-blame --incremental failed");
5552         } else {
5553                 # run git-blame --porcelain
5554                 open $fd, "-|", git_cmd(), "blame", '-p',
5555                         $hash_base, '--', $file_name
5556                         or die_error(500, "Open git-blame --porcelain failed");
5557         }
5558
5559         # incremental blame data returns early
5560         if ($format eq 'data') {
5561                 print $cgi->header(
5562                         -type=>"text/plain", -charset => "utf-8",
5563                         -status=> "200 OK");
5564                 local $| = 1; # output autoflush
5565                 print while <$fd>;
5566                 close $fd
5567                         or print "ERROR $!\n";
5568
5569                 print 'END';
5570                 if (defined $t0 && gitweb_check_feature('timed')) {
5571                         print ' '.
5572                               tv_interval($t0, [ gettimeofday() ]).
5573                               ' '.$number_of_git_cmds;
5574                 }
5575                 print "\n";
5576
5577                 return;
5578         }
5579
5580         # page header
5581         git_header_html();
5582         my $formats_nav =
5583                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5584                         "blob") .
5585                 " | ";
5586         if ($format eq 'incremental') {
5587                 $formats_nav .=
5588                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5589                                 "blame") . " (non-incremental)";
5590         } else {
5591                 $formats_nav .=
5592                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5593                                 "blame") . " (incremental)";
5594         }
5595         $formats_nav .=
5596                 " | " .
5597                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5598                         "history") .
5599                 " | " .
5600                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5601                         "HEAD");
5602         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5603         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5604         git_print_page_path($file_name, $ftype, $hash_base);
5605
5606         # page body
5607         if ($format eq 'incremental') {
5608                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5609                       "This page requires JavaScript to run.\n Use ".
5610                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5611                               'this page').
5612                       " instead.\n".
5613                       "</b></center></div>\n</noscript>\n";
5614
5615                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5616         }
5617
5618         print qq!<div class="page_body">\n!;
5619         print qq!<div id="progress_info">... / ...</div>\n!
5620                 if ($format eq 'incremental');
5621         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5622               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5623               qq!<thead>\n!.
5624               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5625               qq!</thead>\n!.
5626               qq!<tbody>\n!;
5627
5628         my @rev_color = qw(light dark);
5629         my $num_colors = scalar(@rev_color);
5630         my $current_color = 0;
5631
5632         if ($format eq 'incremental') {
5633                 my $color_class = $rev_color[$current_color];
5634
5635                 #contents of a file
5636                 my $linenr = 0;
5637         LINE:
5638                 while (my $line = <$fd>) {
5639                         chomp $line;
5640                         $linenr++;
5641
5642                         print qq!<tr id="l$linenr" class="$color_class">!.
5643                               qq!<td class="sha1"><a href=""> </a></td>!.
5644                               qq!<td class="linenr">!.
5645                               qq!<a class="linenr" href="">$linenr</a></td>!;
5646                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5647                         print qq!</tr>\n!;
5648                 }
5649
5650         } else { # porcelain, i.e. ordinary blame
5651                 my %metainfo = (); # saves information about commits
5652
5653                 # blame data
5654         LINE:
5655                 while (my $line = <$fd>) {
5656                         chomp $line;
5657                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5658                         # no <lines in group> for subsequent lines in group of lines
5659                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5660                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5661                         if (!exists $metainfo{$full_rev}) {
5662                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5663                         }
5664                         my $meta = $metainfo{$full_rev};
5665                         my $data;
5666                         while ($data = <$fd>) {
5667                                 chomp $data;
5668                                 last if ($data =~ s/^\t//); # contents of line
5669                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5670                                         $meta->{$1} = $2 unless exists $meta->{$1};
5671                                 }
5672                                 if ($data =~ /^previous /) {
5673                                         $meta->{'nprevious'}++;
5674                                 }
5675                         }
5676                         my $short_rev = substr($full_rev, 0, 8);
5677                         my $author = $meta->{'author'};
5678                         my %date =
5679                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5680                         my $date = $date{'iso-tz'};
5681                         if ($group_size) {
5682                                 $current_color = ($current_color + 1) % $num_colors;
5683                         }
5684                         my $tr_class = $rev_color[$current_color];
5685                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5686                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5687                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5688                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5689                         if ($group_size) {
5690                                 print "<td class=\"sha1\"";
5691                                 print " title=\"". esc_html($author) . ", $date\"";
5692                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5693                                 print ">";
5694                                 print $cgi->a({-href => href(action=>"commit",
5695                                                              hash=>$full_rev,
5696                                                              file_name=>$file_name)},
5697                                               esc_html($short_rev));
5698                                 if ($group_size >= 2) {
5699                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5700                                         if (@author_initials) {
5701                                                 print "<br />" .
5702                                                       esc_html(join('', @author_initials));
5703                                                 #           or join('.', ...)
5704                                         }
5705                                 }
5706                                 print "</td>\n";
5707                         }
5708                         # 'previous' <sha1 of parent commit> <filename at commit>
5709                         if (exists $meta->{'previous'} &&
5710                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5711                                 $meta->{'parent'} = $1;
5712                                 $meta->{'file_parent'} = unquote($2);
5713                         }
5714                         my $linenr_commit =
5715                                 exists($meta->{'parent'}) ?
5716                                 $meta->{'parent'} : $full_rev;
5717                         my $linenr_filename =
5718                                 exists($meta->{'file_parent'}) ?
5719                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5720                         my $blamed = href(action => 'blame',
5721                                           file_name => $linenr_filename,
5722                                           hash_base => $linenr_commit);
5723                         print "<td class=\"linenr\">";
5724                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5725                                         -class => "linenr" },
5726                                       esc_html($lineno));
5727                         print "</td>";
5728                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5729                         print "</tr>\n";
5730                 } # end while
5731
5732         }
5733
5734         # footer
5735         print "</tbody>\n".
5736               "</table>\n"; # class="blame"
5737         print "</div>\n";   # class="blame_body"
5738         close $fd
5739                 or print "Reading blob failed\n";
5740
5741         git_footer_html();
5742 }
5743
5744 sub git_blame {
5745         git_blame_common();
5746 }
5747
5748 sub git_blame_incremental {
5749         git_blame_common('incremental');
5750 }
5751
5752 sub git_blame_data {
5753         git_blame_common('data');
5754 }
5755
5756 sub git_tags {
5757         my $head = git_get_head_hash($project);
5758         git_header_html();
5759         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5760         git_print_header_div('summary', $project);
5761
5762         my @tagslist = git_get_tags_list();
5763         if (@tagslist) {
5764                 git_tags_body(\@tagslist);
5765         }
5766         git_footer_html();
5767 }
5768
5769 sub git_heads {
5770         my $head = git_get_head_hash($project);
5771         git_header_html();
5772         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5773         git_print_header_div('summary', $project);
5774
5775         my @headslist = git_get_heads_list();
5776         if (@headslist) {
5777                 git_heads_body(\@headslist, $head);
5778         }
5779         git_footer_html();
5780 }
5781
5782 # used both for single remote view and for list of all the remotes
5783 sub git_remotes {
5784         gitweb_check_feature('remote_heads')
5785                 or die_error(403, "Remote heads view is disabled");
5786
5787         my $head = git_get_head_hash($project);
5788         my $remote = $input_params{'hash'};
5789
5790         my $remotedata = git_get_remotes_list($remote);
5791         die_error(500, "Unable to get remote information") unless defined $remotedata;
5792
5793         unless (%$remotedata) {
5794                 die_error(404, defined $remote ?
5795                         "Remote $remote not found" :
5796                         "No remotes found");
5797         }
5798
5799         git_header_html(undef, undef, -action_extra => $remote);
5800         git_print_page_nav('', '',  $head, undef, $head,
5801                 format_ref_views($remote ? '' : 'remotes'));
5802
5803         fill_remote_heads($remotedata);
5804         if (defined $remote) {
5805                 git_print_header_div('remotes', "$remote remote for $project");
5806                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5807         } else {
5808                 git_print_header_div('summary', "$project remotes");
5809                 git_remotes_body($remotedata, undef, $head);
5810         }
5811
5812         git_footer_html();
5813 }
5814
5815 sub git_blob_plain {
5816         my $type = shift;
5817         my $expires;
5818
5819         if (!defined $hash) {
5820                 if (defined $file_name) {
5821                         my $base = $hash_base || git_get_head_hash($project);
5822                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5823                                 or die_error(404, "Cannot find file");
5824                 } else {
5825                         die_error(400, "No file name defined");
5826                 }
5827         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5828                 # blobs defined by non-textual hash id's can be cached
5829                 $expires = "+1d";
5830         }
5831
5832         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5833                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5834
5835         # content-type (can include charset)
5836         $type = blob_contenttype($fd, $file_name, $type);
5837
5838         # "save as" filename, even when no $file_name is given
5839         my $save_as = "$hash";
5840         if (defined $file_name) {
5841                 $save_as = $file_name;
5842         } elsif ($type =~ m/^text\//) {
5843                 $save_as .= '.txt';
5844         }
5845
5846         # With XSS prevention on, blobs of all types except a few known safe
5847         # ones are served with "Content-Disposition: attachment" to make sure
5848         # they don't run in our security domain.  For certain image types,
5849         # blob view writes an <img> tag referring to blob_plain view, and we
5850         # want to be sure not to break that by serving the image as an
5851         # attachment (though Firefox 3 doesn't seem to care).
5852         my $sandbox = $prevent_xss &&
5853                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5854
5855         print $cgi->header(
5856                 -type => $type,
5857                 -expires => $expires,
5858                 -content_disposition =>
5859                         ($sandbox ? 'attachment' : 'inline')
5860                         . '; filename="' . $save_as . '"');
5861         local $/ = undef;
5862         binmode STDOUT, ':raw';
5863         print <$fd>;
5864         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5865         close $fd;
5866 }
5867
5868 sub git_blob {
5869         my $expires;
5870
5871         if (!defined $hash) {
5872                 if (defined $file_name) {
5873                         my $base = $hash_base || git_get_head_hash($project);
5874                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5875                                 or die_error(404, "Cannot find file");
5876                 } else {
5877                         die_error(400, "No file name defined");
5878                 }
5879         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5880                 # blobs defined by non-textual hash id's can be cached
5881                 $expires = "+1d";
5882         }
5883
5884         my $have_blame = gitweb_check_feature('blame');
5885         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5886                 or die_error(500, "Couldn't cat $file_name, $hash");
5887         my $mimetype = blob_mimetype($fd, $file_name);
5888         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5889         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5890                 close $fd;
5891                 return git_blob_plain($mimetype);
5892         }
5893         # we can have blame only for text/* mimetype
5894         $have_blame &&= ($mimetype =~ m!^text/!);
5895
5896         my $highlight = gitweb_check_feature('highlight');
5897         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5898         $fd = run_highlighter($fd, $highlight, $syntax)
5899                 if $syntax;
5900
5901         git_header_html(undef, $expires);
5902         my $formats_nav = '';
5903         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5904                 if (defined $file_name) {
5905                         if ($have_blame) {
5906                                 $formats_nav .=
5907                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5908                                                 "blame") .
5909                                         " | ";
5910                         }
5911                         $formats_nav .=
5912                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5913                                         "history") .
5914                                 " | " .
5915                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5916                                         "raw") .
5917                                 " | " .
5918                                 $cgi->a({-href => href(action=>"blob",
5919                                                        hash_base=>"HEAD", file_name=>$file_name)},
5920                                         "HEAD");
5921                 } else {
5922                         $formats_nav .=
5923                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5924                                         "raw");
5925                 }
5926                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5927                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5928         } else {
5929                 print "<div class=\"page_nav\">\n" .
5930                       "<br/><br/></div>\n" .
5931                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5932         }
5933         git_print_page_path($file_name, "blob", $hash_base);
5934         print "<div class=\"page_body\">\n";
5935         if ($mimetype =~ m!^image/!) {
5936                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5937                 if ($file_name) {
5938                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5939                 }
5940                 print qq! src="! .
5941                       href(action=>"blob_plain", hash=>$hash,
5942                            hash_base=>$hash_base, file_name=>$file_name) .
5943                       qq!" />\n!;
5944         } else {
5945                 my $nr;
5946                 while (my $line = <$fd>) {
5947                         chomp $line;
5948                         $nr++;
5949                         $line = untabify($line);
5950                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5951                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5952                 }
5953         }
5954         close $fd
5955                 or print "Reading blob failed.\n";
5956         print "</div>";
5957         git_footer_html();
5958 }
5959
5960 sub git_tree {
5961         if (!defined $hash_base) {
5962                 $hash_base = "HEAD";
5963         }
5964         if (!defined $hash) {
5965                 if (defined $file_name) {
5966                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5967                 } else {
5968                         $hash = $hash_base;
5969                 }
5970         }
5971         die_error(404, "No such tree") unless defined($hash);
5972
5973         my $show_sizes = gitweb_check_feature('show-sizes');
5974         my $have_blame = gitweb_check_feature('blame');
5975
5976         my @entries = ();
5977         {
5978                 local $/ = "\0";
5979                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5980                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5981                         or die_error(500, "Open git-ls-tree failed");
5982                 @entries = map { chomp; $_ } <$fd>;
5983                 close $fd
5984                         or die_error(404, "Reading tree failed");
5985         }
5986
5987         my $refs = git_get_references();
5988         my $ref = format_ref_marker($refs, $hash_base);
5989         git_header_html();
5990         my $basedir = '';
5991         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5992                 my @views_nav = ();
5993                 if (defined $file_name) {
5994                         push @views_nav,
5995                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5996                                         "history"),
5997                                 $cgi->a({-href => href(action=>"tree",
5998                                                        hash_base=>"HEAD", file_name=>$file_name)},
5999                                         "HEAD"),
6000                 }
6001                 my $snapshot_links = format_snapshot_links($hash);
6002                 if (defined $snapshot_links) {
6003                         # FIXME: Should be available when we have no hash base as well.
6004                         push @views_nav, $snapshot_links;
6005                 }
6006                 git_print_page_nav('tree','', $hash_base, undef, undef,
6007                                    join(' | ', @views_nav));
6008                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6009         } else {
6010                 undef $hash_base;
6011                 print "<div class=\"page_nav\">\n";
6012                 print "<br/><br/></div>\n";
6013                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6014         }
6015         if (defined $file_name) {
6016                 $basedir = $file_name;
6017                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6018                         $basedir .= '/';
6019                 }
6020                 git_print_page_path($file_name, 'tree', $hash_base);
6021         }
6022         print "<div class=\"page_body\">\n";
6023         print "<table class=\"tree\">\n";
6024         my $alternate = 1;
6025         # '..' (top directory) link if possible
6026         if (defined $hash_base &&
6027             defined $file_name && $file_name =~ m![^/]+$!) {
6028                 if ($alternate) {
6029                         print "<tr class=\"dark\">\n";
6030                 } else {
6031                         print "<tr class=\"light\">\n";
6032                 }
6033                 $alternate ^= 1;
6034
6035                 my $up = $file_name;
6036                 $up =~ s!/?[^/]+$!!;
6037                 undef $up unless $up;
6038                 # based on git_print_tree_entry
6039                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6040                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6041                 print '<td class="list">';
6042                 print $cgi->a({-href => href(action=>"tree",
6043                                              hash_base=>$hash_base,
6044                                              file_name=>$up)},
6045                               "..");
6046                 print "</td>\n";
6047                 print "<td class=\"link\"></td>\n";
6048
6049                 print "</tr>\n";
6050         }
6051         foreach my $line (@entries) {
6052                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6053
6054                 if ($alternate) {
6055                         print "<tr class=\"dark\">\n";
6056                 } else {
6057                         print "<tr class=\"light\">\n";
6058                 }
6059                 $alternate ^= 1;
6060
6061                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6062
6063                 print "</tr>\n";
6064         }
6065         print "</table>\n" .
6066               "</div>";
6067         git_footer_html();
6068 }
6069
6070 sub snapshot_name {
6071         my ($project, $hash) = @_;
6072
6073         # path/to/project.git  -> project
6074         # path/to/project/.git -> project
6075         my $name = to_utf8($project);
6076         $name =~ s,([^/])/*\.git$,$1,;
6077         $name = basename($name);
6078         # sanitize name
6079         $name =~ s/[[:cntrl:]]/?/g;
6080
6081         my $ver = $hash;
6082         if ($hash =~ /^[0-9a-fA-F]+$/) {
6083                 # shorten SHA-1 hash
6084                 my $full_hash = git_get_full_hash($project, $hash);
6085                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6086                         $ver = git_get_short_hash($project, $hash);
6087                 }
6088         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6089                 # tags don't need shortened SHA-1 hash
6090                 $ver = $1;
6091         } else {
6092                 # branches and other need shortened SHA-1 hash
6093                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6094                         $ver = $1;
6095                 }
6096                 $ver .= '-' . git_get_short_hash($project, $hash);
6097         }
6098         # in case of hierarchical branch names
6099         $ver =~ s!/!.!g;
6100
6101         # name = project-version_string
6102         $name = "$name-$ver";
6103
6104         return wantarray ? ($name, $name) : $name;
6105 }
6106
6107 sub git_snapshot {
6108         my $format = $input_params{'snapshot_format'};
6109         if (!@snapshot_fmts) {
6110                 die_error(403, "Snapshots not allowed");
6111         }
6112         # default to first supported snapshot format
6113         $format ||= $snapshot_fmts[0];
6114         if ($format !~ m/^[a-z0-9]+$/) {
6115                 die_error(400, "Invalid snapshot format parameter");
6116         } elsif (!exists($known_snapshot_formats{$format})) {
6117                 die_error(400, "Unknown snapshot format");
6118         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6119                 die_error(403, "Snapshot format not allowed");
6120         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6121                 die_error(403, "Unsupported snapshot format");
6122         }
6123
6124         my $type = git_get_type("$hash^{}");
6125         if (!$type) {
6126                 die_error(404, 'Object does not exist');
6127         }  elsif ($type eq 'blob') {
6128                 die_error(400, 'Object is not a tree-ish');
6129         }
6130
6131         my ($name, $prefix) = snapshot_name($project, $hash);
6132         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6133         my $cmd = quote_command(
6134                 git_cmd(), 'archive',
6135                 "--format=$known_snapshot_formats{$format}{'format'}",
6136                 "--prefix=$prefix/", $hash);
6137         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6138                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6139         }
6140
6141         $filename =~ s/(["\\])/\\$1/g;
6142         print $cgi->header(
6143                 -type => $known_snapshot_formats{$format}{'type'},
6144                 -content_disposition => 'inline; filename="' . $filename . '"',
6145                 -status => '200 OK');
6146
6147         open my $fd, "-|", $cmd
6148                 or die_error(500, "Execute git-archive failed");
6149         binmode STDOUT, ':raw';
6150         print <$fd>;
6151         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6152         close $fd;
6153 }
6154
6155 sub git_log_generic {
6156         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6157
6158         my $head = git_get_head_hash($project);
6159         if (!defined $base) {
6160                 $base = $head;
6161         }
6162         if (!defined $page) {
6163                 $page = 0;
6164         }
6165         my $refs = git_get_references();
6166
6167         my $commit_hash = $base;
6168         if (defined $parent) {
6169                 $commit_hash = "$parent..$base";
6170         }
6171         my @commitlist =
6172                 parse_commits($commit_hash, 101, (100 * $page),
6173                               defined $file_name ? ($file_name, "--full-history") : ());
6174
6175         my $ftype;
6176         if (!defined $file_hash && defined $file_name) {
6177                 # some commits could have deleted file in question,
6178                 # and not have it in tree, but one of them has to have it
6179                 for (my $i = 0; $i < @commitlist; $i++) {
6180                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6181                         last if defined $file_hash;
6182                 }
6183         }
6184         if (defined $file_hash) {
6185                 $ftype = git_get_type($file_hash);
6186         }
6187         if (defined $file_name && !defined $ftype) {
6188                 die_error(500, "Unknown type of object");
6189         }
6190         my %co;
6191         if (defined $file_name) {
6192                 %co = parse_commit($base)
6193                         or die_error(404, "Unknown commit object");
6194         }
6195
6196
6197         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6198         my $next_link = '';
6199         if ($#commitlist >= 100) {
6200                 $next_link =
6201                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6202                                  -accesskey => "n", -title => "Alt-n"}, "next");
6203         }
6204         my $patch_max = gitweb_get_feature('patches');
6205         if ($patch_max && !defined $file_name) {
6206                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6207                         $paging_nav .= " &sdot; " .
6208                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6209                                         "patches");
6210                 }
6211         }
6212
6213         git_header_html();
6214         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6215         if (defined $file_name) {
6216                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6217         } else {
6218                 git_print_header_div('summary', $project)
6219         }
6220         git_print_page_path($file_name, $ftype, $hash_base)
6221                 if (defined $file_name);
6222
6223         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6224                      $file_name, $file_hash, $ftype);
6225
6226         git_footer_html();
6227 }
6228
6229 sub git_log {
6230         git_log_generic('log', \&git_log_body,
6231                         $hash, $hash_parent);
6232 }
6233
6234 sub git_commit {
6235         $hash ||= $hash_base || "HEAD";
6236         my %co = parse_commit($hash)
6237             or die_error(404, "Unknown commit object");
6238
6239         my $parent  = $co{'parent'};
6240         my $parents = $co{'parents'}; # listref
6241
6242         # we need to prepare $formats_nav before any parameter munging
6243         my $formats_nav;
6244         if (!defined $parent) {
6245                 # --root commitdiff
6246                 $formats_nav .= '(initial)';
6247         } elsif (@$parents == 1) {
6248                 # single parent commit
6249                 $formats_nav .=
6250                         '(parent: ' .
6251                         $cgi->a({-href => href(action=>"commit",
6252                                                hash=>$parent)},
6253                                 esc_html(substr($parent, 0, 7))) .
6254                         ')';
6255         } else {
6256                 # merge commit
6257                 $formats_nav .=
6258                         '(merge: ' .
6259                         join(' ', map {
6260                                 $cgi->a({-href => href(action=>"commit",
6261                                                        hash=>$_)},
6262                                         esc_html(substr($_, 0, 7)));
6263                         } @$parents ) .
6264                         ')';
6265         }
6266         if (gitweb_check_feature('patches') && @$parents <= 1) {
6267                 $formats_nav .= " | " .
6268                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6269                                 "patch");
6270         }
6271
6272         if (!defined $parent) {
6273                 $parent = "--root";
6274         }
6275         my @difftree;
6276         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6277                 @diff_opts,
6278                 (@$parents <= 1 ? $parent : '-c'),
6279                 $hash, "--"
6280                 or die_error(500, "Open git-diff-tree failed");
6281         @difftree = map { chomp; $_ } <$fd>;
6282         close $fd or die_error(404, "Reading git-diff-tree failed");
6283
6284         # non-textual hash id's can be cached
6285         my $expires;
6286         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6287                 $expires = "+1d";
6288         }
6289         my $refs = git_get_references();
6290         my $ref = format_ref_marker($refs, $co{'id'});
6291
6292         git_header_html(undef, $expires);
6293         git_print_page_nav('commit', '',
6294                            $hash, $co{'tree'}, $hash,
6295                            $formats_nav);
6296
6297         if (defined $co{'parent'}) {
6298                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6299         } else {
6300                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6301         }
6302         print "<div class=\"title_text\">\n" .
6303               "<table class=\"object_header\">\n";
6304         git_print_authorship_rows(\%co);
6305         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6306         print "<tr>" .
6307               "<td>tree</td>" .
6308               "<td class=\"sha1\">" .
6309               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6310                        class => "list"}, $co{'tree'}) .
6311               "</td>" .
6312               "<td class=\"link\">" .
6313               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6314                       "tree");
6315         my $snapshot_links = format_snapshot_links($hash);
6316         if (defined $snapshot_links) {
6317                 print " | " . $snapshot_links;
6318         }
6319         print "</td>" .
6320               "</tr>\n";
6321
6322         foreach my $par (@$parents) {
6323                 print "<tr>" .
6324                       "<td>parent</td>" .
6325                       "<td class=\"sha1\">" .
6326                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6327                                class => "list"}, $par) .
6328                       "</td>" .
6329                       "<td class=\"link\">" .
6330                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6331                       " | " .
6332                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6333                       "</td>" .
6334                       "</tr>\n";
6335         }
6336         print "</table>".
6337               "</div>\n";
6338
6339         print "<div class=\"page_body\">\n";
6340         git_print_log($co{'comment'});
6341         print "</div>\n";
6342
6343         git_difftree_body(\@difftree, $hash, @$parents);
6344
6345         git_footer_html();
6346 }
6347
6348 sub git_object {
6349         # object is defined by:
6350         # - hash or hash_base alone
6351         # - hash_base and file_name
6352         my $type;
6353
6354         # - hash or hash_base alone
6355         if ($hash || ($hash_base && !defined $file_name)) {
6356                 my $object_id = $hash || $hash_base;
6357
6358                 open my $fd, "-|", quote_command(
6359                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6360                         or die_error(404, "Object does not exist");
6361                 $type = <$fd>;
6362                 chomp $type;
6363                 close $fd
6364                         or die_error(404, "Object does not exist");
6365
6366         # - hash_base and file_name
6367         } elsif ($hash_base && defined $file_name) {
6368                 $file_name =~ s,/+$,,;
6369
6370                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6371                         or die_error(404, "Base object does not exist");
6372
6373                 # here errors should not hapen
6374                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6375                         or die_error(500, "Open git-ls-tree failed");
6376                 my $line = <$fd>;
6377                 close $fd;
6378
6379                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6380                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6381                         die_error(404, "File or directory for given base does not exist");
6382                 }
6383                 $type = $2;
6384                 $hash = $3;
6385         } else {
6386                 die_error(400, "Not enough information to find object");
6387         }
6388
6389         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6390                                           hash=>$hash, hash_base=>$hash_base,
6391                                           file_name=>$file_name),
6392                              -status => '302 Found');
6393 }
6394
6395 sub git_blobdiff {
6396         my $format = shift || 'html';
6397
6398         my $fd;
6399         my @difftree;
6400         my %diffinfo;
6401         my $expires;
6402
6403         # preparing $fd and %diffinfo for git_patchset_body
6404         # new style URI
6405         if (defined $hash_base && defined $hash_parent_base) {
6406                 if (defined $file_name) {
6407                         # read raw output
6408                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6409                                 $hash_parent_base, $hash_base,
6410                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6411                                 or die_error(500, "Open git-diff-tree failed");
6412                         @difftree = map { chomp; $_ } <$fd>;
6413                         close $fd
6414                                 or die_error(404, "Reading git-diff-tree failed");
6415                         @difftree
6416                                 or die_error(404, "Blob diff not found");
6417
6418                 } elsif (defined $hash &&
6419                          $hash =~ /[0-9a-fA-F]{40}/) {
6420                         # try to find filename from $hash
6421
6422                         # read filtered raw output
6423                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6424                                 $hash_parent_base, $hash_base, "--"
6425                                 or die_error(500, "Open git-diff-tree failed");
6426                         @difftree =
6427                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6428                                 # $hash == to_id
6429                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6430                                 map { chomp; $_ } <$fd>;
6431                         close $fd
6432                                 or die_error(404, "Reading git-diff-tree failed");
6433                         @difftree
6434                                 or die_error(404, "Blob diff not found");
6435
6436                 } else {
6437                         die_error(400, "Missing one of the blob diff parameters");
6438                 }
6439
6440                 if (@difftree > 1) {
6441                         die_error(400, "Ambiguous blob diff specification");
6442                 }
6443
6444                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6445                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6446                 $file_name   ||= $diffinfo{'to_file'};
6447
6448                 $hash_parent ||= $diffinfo{'from_id'};
6449                 $hash        ||= $diffinfo{'to_id'};
6450
6451                 # non-textual hash id's can be cached
6452                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6453                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6454                         $expires = '+1d';
6455                 }
6456
6457                 # open patch output
6458                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6459                         '-p', ($format eq 'html' ? "--full-index" : ()),
6460                         $hash_parent_base, $hash_base,
6461                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6462                         or die_error(500, "Open git-diff-tree failed");
6463         }
6464
6465         # old/legacy style URI -- not generated anymore since 1.4.3.
6466         if (!%diffinfo) {
6467                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6468         }
6469
6470         # header
6471         if ($format eq 'html') {
6472                 my $formats_nav =
6473                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6474                                 "raw");
6475                 git_header_html(undef, $expires);
6476                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6477                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6478                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6479                 } else {
6480                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6481                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6482                 }
6483                 if (defined $file_name) {
6484                         git_print_page_path($file_name, "blob", $hash_base);
6485                 } else {
6486                         print "<div class=\"page_path\"></div>\n";
6487                 }
6488
6489         } elsif ($format eq 'plain') {
6490                 print $cgi->header(
6491                         -type => 'text/plain',
6492                         -charset => 'utf-8',
6493                         -expires => $expires,
6494                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6495
6496                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6497
6498         } else {
6499                 die_error(400, "Unknown blobdiff format");
6500         }
6501
6502         # patch
6503         if ($format eq 'html') {
6504                 print "<div class=\"page_body\">\n";
6505
6506                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6507                 close $fd;
6508
6509                 print "</div>\n"; # class="page_body"
6510                 git_footer_html();
6511
6512         } else {
6513                 while (my $line = <$fd>) {
6514                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6515                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6516
6517                         print $line;
6518
6519                         last if $line =~ m!^\+\+\+!;
6520                 }
6521                 local $/ = undef;
6522                 print <$fd>;
6523                 close $fd;
6524         }
6525 }
6526
6527 sub git_blobdiff_plain {
6528         git_blobdiff('plain');
6529 }
6530
6531 sub git_commitdiff {
6532         my %params = @_;
6533         my $format = $params{-format} || 'html';
6534
6535         my ($patch_max) = gitweb_get_feature('patches');
6536         if ($format eq 'patch') {
6537                 die_error(403, "Patch view not allowed") unless $patch_max;
6538         }
6539
6540         $hash ||= $hash_base || "HEAD";
6541         my %co = parse_commit($hash)
6542             or die_error(404, "Unknown commit object");
6543
6544         # choose format for commitdiff for merge
6545         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6546                 $hash_parent = '--cc';
6547         }
6548         # we need to prepare $formats_nav before almost any parameter munging
6549         my $formats_nav;
6550         if ($format eq 'html') {
6551                 $formats_nav =
6552                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6553                                 "raw");
6554                 if ($patch_max && @{$co{'parents'}} <= 1) {
6555                         $formats_nav .= " | " .
6556                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6557                                         "patch");
6558                 }
6559
6560                 if (defined $hash_parent &&
6561                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6562                         # commitdiff with two commits given
6563                         my $hash_parent_short = $hash_parent;
6564                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6565                                 $hash_parent_short = substr($hash_parent, 0, 7);
6566                         }
6567                         $formats_nav .=
6568                                 ' (from';
6569                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6570                                 if ($co{'parents'}[$i] eq $hash_parent) {
6571                                         $formats_nav .= ' parent ' . ($i+1);
6572                                         last;
6573                                 }
6574                         }
6575                         $formats_nav .= ': ' .
6576                                 $cgi->a({-href => href(action=>"commitdiff",
6577                                                        hash=>$hash_parent)},
6578                                         esc_html($hash_parent_short)) .
6579                                 ')';
6580                 } elsif (!$co{'parent'}) {
6581                         # --root commitdiff
6582                         $formats_nav .= ' (initial)';
6583                 } elsif (scalar @{$co{'parents'}} == 1) {
6584                         # single parent commit
6585                         $formats_nav .=
6586                                 ' (parent: ' .
6587                                 $cgi->a({-href => href(action=>"commitdiff",
6588                                                        hash=>$co{'parent'})},
6589                                         esc_html(substr($co{'parent'}, 0, 7))) .
6590                                 ')';
6591                 } else {
6592                         # merge commit
6593                         if ($hash_parent eq '--cc') {
6594                                 $formats_nav .= ' | ' .
6595                                         $cgi->a({-href => href(action=>"commitdiff",
6596                                                                hash=>$hash, hash_parent=>'-c')},
6597                                                 'combined');
6598                         } else { # $hash_parent eq '-c'
6599                                 $formats_nav .= ' | ' .
6600                                         $cgi->a({-href => href(action=>"commitdiff",
6601                                                                hash=>$hash, hash_parent=>'--cc')},
6602                                                 'compact');
6603                         }
6604                         $formats_nav .=
6605                                 ' (merge: ' .
6606                                 join(' ', map {
6607                                         $cgi->a({-href => href(action=>"commitdiff",
6608                                                                hash=>$_)},
6609                                                 esc_html(substr($_, 0, 7)));
6610                                 } @{$co{'parents'}} ) .
6611                                 ')';
6612                 }
6613         }
6614
6615         my $hash_parent_param = $hash_parent;
6616         if (!defined $hash_parent_param) {
6617                 # --cc for multiple parents, --root for parentless
6618                 $hash_parent_param =
6619                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6620         }
6621
6622         # read commitdiff
6623         my $fd;
6624         my @difftree;
6625         if ($format eq 'html') {
6626                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6627                         "--no-commit-id", "--patch-with-raw", "--full-index",
6628                         $hash_parent_param, $hash, "--"
6629                         or die_error(500, "Open git-diff-tree failed");
6630
6631                 while (my $line = <$fd>) {
6632                         chomp $line;
6633                         # empty line ends raw part of diff-tree output
6634                         last unless $line;
6635                         push @difftree, scalar parse_difftree_raw_line($line);
6636                 }
6637
6638         } elsif ($format eq 'plain') {
6639                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6640                         '-p', $hash_parent_param, $hash, "--"
6641                         or die_error(500, "Open git-diff-tree failed");
6642         } elsif ($format eq 'patch') {
6643                 # For commit ranges, we limit the output to the number of
6644                 # patches specified in the 'patches' feature.
6645                 # For single commits, we limit the output to a single patch,
6646                 # diverging from the git-format-patch default.
6647                 my @commit_spec = ();
6648                 if ($hash_parent) {
6649                         if ($patch_max > 0) {
6650                                 push @commit_spec, "-$patch_max";
6651                         }
6652                         push @commit_spec, '-n', "$hash_parent..$hash";
6653                 } else {
6654                         if ($params{-single}) {
6655                                 push @commit_spec, '-1';
6656                         } else {
6657                                 if ($patch_max > 0) {
6658                                         push @commit_spec, "-$patch_max";
6659                                 }
6660                                 push @commit_spec, "-n";
6661                         }
6662                         push @commit_spec, '--root', $hash;
6663                 }
6664                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6665                         '--encoding=utf8', '--stdout', @commit_spec
6666                         or die_error(500, "Open git-format-patch failed");
6667         } else {
6668                 die_error(400, "Unknown commitdiff format");
6669         }
6670
6671         # non-textual hash id's can be cached
6672         my $expires;
6673         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6674                 $expires = "+1d";
6675         }
6676
6677         # write commit message
6678         if ($format eq 'html') {
6679                 my $refs = git_get_references();
6680                 my $ref = format_ref_marker($refs, $co{'id'});
6681
6682                 git_header_html(undef, $expires);
6683                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6684                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6685                 print "<div class=\"title_text\">\n" .
6686                       "<table class=\"object_header\">\n";
6687                 git_print_authorship_rows(\%co);
6688                 print "</table>".
6689                       "</div>\n";
6690                 print "<div class=\"page_body\">\n";
6691                 if (@{$co{'comment'}} > 1) {
6692                         print "<div class=\"log\">\n";
6693                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6694                         print "</div>\n"; # class="log"
6695                 }
6696
6697         } elsif ($format eq 'plain') {
6698                 my $refs = git_get_references("tags");
6699                 my $tagname = git_get_rev_name_tags($hash);
6700                 my $filename = basename($project) . "-$hash.patch";
6701
6702                 print $cgi->header(
6703                         -type => 'text/plain',
6704                         -charset => 'utf-8',
6705                         -expires => $expires,
6706                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6707                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6708                 print "From: " . to_utf8($co{'author'}) . "\n";
6709                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6710                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6711
6712                 print "X-Git-Tag: $tagname\n" if $tagname;
6713                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6714
6715                 foreach my $line (@{$co{'comment'}}) {
6716                         print to_utf8($line) . "\n";
6717                 }
6718                 print "---\n\n";
6719         } elsif ($format eq 'patch') {
6720                 my $filename = basename($project) . "-$hash.patch";
6721
6722                 print $cgi->header(
6723                         -type => 'text/plain',
6724                         -charset => 'utf-8',
6725                         -expires => $expires,
6726                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6727         }
6728
6729         # write patch
6730         if ($format eq 'html') {
6731                 my $use_parents = !defined $hash_parent ||
6732                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6733                 git_difftree_body(\@difftree, $hash,
6734                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6735                 print "<br/>\n";
6736
6737                 git_patchset_body($fd, \@difftree, $hash,
6738                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6739                 close $fd;
6740                 print "</div>\n"; # class="page_body"
6741                 git_footer_html();
6742
6743         } elsif ($format eq 'plain') {
6744                 local $/ = undef;
6745                 print <$fd>;
6746                 close $fd
6747                         or print "Reading git-diff-tree failed\n";
6748         } elsif ($format eq 'patch') {
6749                 local $/ = undef;
6750                 print <$fd>;
6751                 close $fd
6752                         or print "Reading git-format-patch failed\n";
6753         }
6754 }
6755
6756 sub git_commitdiff_plain {
6757         git_commitdiff(-format => 'plain');
6758 }
6759
6760 # format-patch-style patches
6761 sub git_patch {
6762         git_commitdiff(-format => 'patch', -single => 1);
6763 }
6764
6765 sub git_patches {
6766         git_commitdiff(-format => 'patch');
6767 }
6768
6769 sub git_history {
6770         git_log_generic('history', \&git_history_body,
6771                         $hash_base, $hash_parent_base,
6772                         $file_name, $hash);
6773 }
6774
6775 sub git_search {
6776         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6777         if (!defined $searchtext) {
6778                 die_error(400, "Text field is empty");
6779         }
6780         if (!defined $hash) {
6781                 $hash = git_get_head_hash($project);
6782         }
6783         my %co = parse_commit($hash);
6784         if (!%co) {
6785                 die_error(404, "Unknown commit object");
6786         }
6787         if (!defined $page) {
6788                 $page = 0;
6789         }
6790
6791         $searchtype ||= 'commit';
6792         if ($searchtype eq 'pickaxe') {
6793                 # pickaxe may take all resources of your box and run for several minutes
6794                 # with every query - so decide by yourself how public you make this feature
6795                 gitweb_check_feature('pickaxe')
6796                     or die_error(403, "Pickaxe is disabled");
6797         }
6798         if ($searchtype eq 'grep') {
6799                 gitweb_check_feature('grep')[0]
6800                     or die_error(403, "Grep is disabled");
6801         }
6802
6803         git_header_html();
6804
6805         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6806                 my $greptype;
6807                 if ($searchtype eq 'commit') {
6808                         $greptype = "--grep=";
6809                 } elsif ($searchtype eq 'author') {
6810                         $greptype = "--author=";
6811                 } elsif ($searchtype eq 'committer') {
6812                         $greptype = "--committer=";
6813                 }
6814                 $greptype .= $searchtext;
6815                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6816                                                $greptype, '--regexp-ignore-case',
6817                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6818
6819                 my $paging_nav = '';
6820                 if ($page > 0) {
6821                         $paging_nav .=
6822                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6823                                                        searchtext=>$searchtext,
6824                                                        searchtype=>$searchtype)},
6825                                         "first");
6826                         $paging_nav .= " &sdot; " .
6827                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6828                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6829                 } else {
6830                         $paging_nav .= "first";
6831                         $paging_nav .= " &sdot; prev";
6832                 }
6833                 my $next_link = '';
6834                 if ($#commitlist >= 100) {
6835                         $next_link =
6836                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6837                                          -accesskey => "n", -title => "Alt-n"}, "next");
6838                         $paging_nav .= " &sdot; $next_link";
6839                 } else {
6840                         $paging_nav .= " &sdot; next";
6841                 }
6842
6843                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6844                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6845                 if ($page == 0 && !@commitlist) {
6846                         print "<p>No match.</p>\n";
6847                 } else {
6848                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6849                 }
6850         }
6851
6852         if ($searchtype eq 'pickaxe') {
6853                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6854                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6855
6856                 print "<table class=\"pickaxe search\">\n";
6857                 my $alternate = 1;
6858                 local $/ = "\n";
6859                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6860                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6861                         ($search_use_regexp ? '--pickaxe-regex' : ());
6862                 undef %co;
6863                 my @files;
6864                 while (my $line = <$fd>) {
6865                         chomp $line;
6866                         next unless $line;
6867
6868                         my %set = parse_difftree_raw_line($line);
6869                         if (defined $set{'commit'}) {
6870                                 # finish previous commit
6871                                 if (%co) {
6872                                         print "</td>\n" .
6873                                               "<td class=\"link\">" .
6874                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6875                                               " | " .
6876                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6877                                         print "</td>\n" .
6878                                               "</tr>\n";
6879                                 }
6880
6881                                 if ($alternate) {
6882                                         print "<tr class=\"dark\">\n";
6883                                 } else {
6884                                         print "<tr class=\"light\">\n";
6885                                 }
6886                                 $alternate ^= 1;
6887                                 %co = parse_commit($set{'commit'});
6888                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6889                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6890                                       "<td><i>$author</i></td>\n" .
6891                                       "<td>" .
6892                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6893                                               -class => "list subject"},
6894                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6895                         } elsif (defined $set{'to_id'}) {
6896                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6897
6898                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6899                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6900                                               -class => "list"},
6901                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6902                                       "<br/>\n";
6903                         }
6904                 }
6905                 close $fd;
6906
6907                 # finish last commit (warning: repetition!)
6908                 if (%co) {
6909                         print "</td>\n" .
6910                               "<td class=\"link\">" .
6911                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6912                               " | " .
6913                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6914                         print "</td>\n" .
6915                               "</tr>\n";
6916                 }
6917
6918                 print "</table>\n";
6919         }
6920
6921         if ($searchtype eq 'grep') {
6922                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6923                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6924
6925                 print "<table class=\"grep_search\">\n";
6926                 my $alternate = 1;
6927                 my $matches = 0;
6928                 local $/ = "\n";
6929                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6930                         $search_use_regexp ? ('-E', '-i') : '-F',
6931                         $searchtext, $co{'tree'};
6932                 my $lastfile = '';
6933                 while (my $line = <$fd>) {
6934                         chomp $line;
6935                         my ($file, $lno, $ltext, $binary);
6936                         last if ($matches++ > 1000);
6937                         if ($line =~ /^Binary file (.+) matches$/) {
6938                                 $file = $1;
6939                                 $binary = 1;
6940                         } else {
6941                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6942                         }
6943                         if ($file ne $lastfile) {
6944                                 $lastfile and print "</td></tr>\n";
6945                                 if ($alternate++) {
6946                                         print "<tr class=\"dark\">\n";
6947                                 } else {
6948                                         print "<tr class=\"light\">\n";
6949                                 }
6950                                 print "<td class=\"list\">".
6951                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6952                                                                file_name=>"$file"),
6953                                                 -class => "list"}, esc_path($file));
6954                                 print "</td><td>\n";
6955                                 $lastfile = $file;
6956                         }
6957                         if ($binary) {
6958                                 print "<div class=\"binary\">Binary file</div>\n";
6959                         } else {
6960                                 $ltext = untabify($ltext);
6961                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6962                                         $ltext = esc_html($1, -nbsp=>1);
6963                                         $ltext .= '<span class="match">';
6964                                         $ltext .= esc_html($2, -nbsp=>1);
6965                                         $ltext .= '</span>';
6966                                         $ltext .= esc_html($3, -nbsp=>1);
6967                                 } else {
6968                                         $ltext = esc_html($ltext, -nbsp=>1);
6969                                 }
6970                                 print "<div class=\"pre\">" .
6971                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6972                                                                file_name=>"$file").'#l'.$lno,
6973                                                 -class => "linenr"}, sprintf('%4i', $lno))
6974                                         . ' ' .  $ltext . "</div>\n";
6975                         }
6976                 }
6977                 if ($lastfile) {
6978                         print "</td></tr>\n";
6979                         if ($matches > 1000) {
6980                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6981                         }
6982                 } else {
6983                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6984                 }
6985                 close $fd;
6986
6987                 print "</table>\n";
6988         }
6989         git_footer_html();
6990 }
6991
6992 sub git_search_help {
6993         git_header_html();
6994         git_print_page_nav('','', $hash,$hash,$hash);
6995         print <<EOT;
6996 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6997 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6998 the pattern entered is recognized as the POSIX extended
6999 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7000 insensitive).</p>
7001 <dl>
7002 <dt><b>commit</b></dt>
7003 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7004 EOT
7005         my $have_grep = gitweb_check_feature('grep');
7006         if ($have_grep) {
7007                 print <<EOT;
7008 <dt><b>grep</b></dt>
7009 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7010     a different one) are searched for the given pattern. On large trees, this search can take
7011 a while and put some strain on the server, so please use it with some consideration. Note that
7012 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7013 case-sensitive.</dd>
7014 EOT
7015         }
7016         print <<EOT;
7017 <dt><b>author</b></dt>
7018 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7019 <dt><b>committer</b></dt>
7020 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7021 EOT
7022         my $have_pickaxe = gitweb_check_feature('pickaxe');
7023         if ($have_pickaxe) {
7024                 print <<EOT;
7025 <dt><b>pickaxe</b></dt>
7026 <dd>All commits that caused the string to appear or disappear from any file (changes that
7027 added, removed or "modified" the string) will be listed. This search can take a while and
7028 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7029 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7030 EOT
7031         }
7032         print "</dl>\n";
7033         git_footer_html();
7034 }
7035
7036 sub git_shortlog {
7037         git_log_generic('shortlog', \&git_shortlog_body,
7038                         $hash, $hash_parent);
7039 }
7040
7041 ## ......................................................................
7042 ## feeds (RSS, Atom; OPML)
7043
7044 sub git_feed {
7045         my $format = shift || 'atom';
7046         my $have_blame = gitweb_check_feature('blame');
7047
7048         # Atom: http://www.atomenabled.org/developers/syndication/
7049         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7050         if ($format ne 'rss' && $format ne 'atom') {
7051                 die_error(400, "Unknown web feed format");
7052         }
7053
7054         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7055         my $head = $hash || 'HEAD';
7056         my @commitlist = parse_commits($head, 150, 0, $file_name);
7057
7058         my %latest_commit;
7059         my %latest_date;
7060         my $content_type = "application/$format+xml";
7061         if (defined $cgi->http('HTTP_ACCEPT') &&
7062                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7063                 # browser (feed reader) prefers text/xml
7064                 $content_type = 'text/xml';
7065         }
7066         if (defined($commitlist[0])) {
7067                 %latest_commit = %{$commitlist[0]};
7068                 my $latest_epoch = $latest_commit{'committer_epoch'};
7069                 %latest_date   = parse_date($latest_epoch);
7070                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7071                 if (defined $if_modified) {
7072                         my $since;
7073                         if (eval { require HTTP::Date; 1; }) {
7074                                 $since = HTTP::Date::str2time($if_modified);
7075                         } elsif (eval { require Time::ParseDate; 1; }) {
7076                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7077                         }
7078                         if (defined $since && $latest_epoch <= $since) {
7079                                 print $cgi->header(
7080                                         -type => $content_type,
7081                                         -charset => 'utf-8',
7082                                         -last_modified => $latest_date{'rfc2822'},
7083                                         -status => '304 Not Modified');
7084                                 return;
7085                         }
7086                 }
7087                 print $cgi->header(
7088                         -type => $content_type,
7089                         -charset => 'utf-8',
7090                         -last_modified => $latest_date{'rfc2822'});
7091         } else {
7092                 print $cgi->header(
7093                         -type => $content_type,
7094                         -charset => 'utf-8');
7095         }
7096
7097         # Optimization: skip generating the body if client asks only
7098         # for Last-Modified date.
7099         return if ($cgi->request_method() eq 'HEAD');
7100
7101         # header variables
7102         my $title = "$site_name - $project/$action";
7103         my $feed_type = 'log';
7104         if (defined $hash) {
7105                 $title .= " - '$hash'";
7106                 $feed_type = 'branch log';
7107                 if (defined $file_name) {
7108                         $title .= " :: $file_name";
7109                         $feed_type = 'history';
7110                 }
7111         } elsif (defined $file_name) {
7112                 $title .= " - $file_name";
7113                 $feed_type = 'history';
7114         }
7115         $title .= " $feed_type";
7116         my $descr = git_get_project_description($project);
7117         if (defined $descr) {
7118                 $descr = esc_html($descr);
7119         } else {
7120                 $descr = "$project " .
7121                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7122                          " feed";
7123         }
7124         my $owner = git_get_project_owner($project);
7125         $owner = esc_html($owner);
7126
7127         #header
7128         my $alt_url;
7129         if (defined $file_name) {
7130                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7131         } elsif (defined $hash) {
7132                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7133         } else {
7134                 $alt_url = href(-full=>1, action=>"summary");
7135         }
7136         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7137         if ($format eq 'rss') {
7138                 print <<XML;
7139 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7140 <channel>
7141 XML
7142                 print "<title>$title</title>\n" .
7143                       "<link>$alt_url</link>\n" .
7144                       "<description>$descr</description>\n" .
7145                       "<language>en</language>\n" .
7146                       # project owner is responsible for 'editorial' content
7147                       "<managingEditor>$owner</managingEditor>\n";
7148                 if (defined $logo || defined $favicon) {
7149                         # prefer the logo to the favicon, since RSS
7150                         # doesn't allow both
7151                         my $img = esc_url($logo || $favicon);
7152                         print "<image>\n" .
7153                               "<url>$img</url>\n" .
7154                               "<title>$title</title>\n" .
7155                               "<link>$alt_url</link>\n" .
7156                               "</image>\n";
7157                 }
7158                 if (%latest_date) {
7159                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7160                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7161                 }
7162                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7163         } elsif ($format eq 'atom') {
7164                 print <<XML;
7165 <feed xmlns="http://www.w3.org/2005/Atom">
7166 XML
7167                 print "<title>$title</title>\n" .
7168                       "<subtitle>$descr</subtitle>\n" .
7169                       '<link rel="alternate" type="text/html" href="' .
7170                       $alt_url . '" />' . "\n" .
7171                       '<link rel="self" type="' . $content_type . '" href="' .
7172                       $cgi->self_url() . '" />' . "\n" .
7173                       "<id>" . href(-full=>1) . "</id>\n" .
7174                       # use project owner for feed author
7175                       "<author><name>$owner</name></author>\n";
7176                 if (defined $favicon) {
7177                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7178                 }
7179                 if (defined $logo) {
7180                         # not twice as wide as tall: 72 x 27 pixels
7181                         print "<logo>" . esc_url($logo) . "</logo>\n";
7182                 }
7183                 if (! %latest_date) {
7184                         # dummy date to keep the feed valid until commits trickle in:
7185                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7186                 } else {
7187                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7188                 }
7189                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7190         }
7191
7192         # contents
7193         for (my $i = 0; $i <= $#commitlist; $i++) {
7194                 my %co = %{$commitlist[$i]};
7195                 my $commit = $co{'id'};
7196                 # we read 150, we always show 30 and the ones more recent than 48 hours
7197                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7198                         last;
7199                 }
7200                 my %cd = parse_date($co{'author_epoch'});
7201
7202                 # get list of changed files
7203                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7204                         $co{'parent'} || "--root",
7205                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7206                         or next;
7207                 my @difftree = map { chomp; $_ } <$fd>;
7208                 close $fd
7209                         or next;
7210
7211                 # print element (entry, item)
7212                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7213                 if ($format eq 'rss') {
7214                         print "<item>\n" .
7215                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7216                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7217                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7218                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7219                               "<link>$co_url</link>\n" .
7220                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7221                               "<content:encoded>" .
7222                               "<![CDATA[\n";
7223                 } elsif ($format eq 'atom') {
7224                         print "<entry>\n" .
7225                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7226                               "<updated>$cd{'iso-8601'}</updated>\n" .
7227                               "<author>\n" .
7228                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7229                         if ($co{'author_email'}) {
7230                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7231                         }
7232                         print "</author>\n" .
7233                               # use committer for contributor
7234                               "<contributor>\n" .
7235                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7236                         if ($co{'committer_email'}) {
7237                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7238                         }
7239                         print "</contributor>\n" .
7240                               "<published>$cd{'iso-8601'}</published>\n" .
7241                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7242                               "<id>$co_url</id>\n" .
7243                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7244                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7245                 }
7246                 my $comment = $co{'comment'};
7247                 print "<pre>\n";
7248                 foreach my $line (@$comment) {
7249                         $line = esc_html($line);
7250                         print "$line\n";
7251                 }
7252                 print "</pre><ul>\n";
7253                 foreach my $difftree_line (@difftree) {
7254                         my %difftree = parse_difftree_raw_line($difftree_line);
7255                         next if !$difftree{'from_id'};
7256
7257                         my $file = $difftree{'file'} || $difftree{'to_file'};
7258
7259                         print "<li>" .
7260                               "[" .
7261                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7262                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7263                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7264                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7265                                       -title => "diff"}, 'D');
7266                         if ($have_blame) {
7267                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7268                                                              file_name=>$file, hash_base=>$commit),
7269                                               -title => "blame"}, 'B');
7270                         }
7271                         # if this is not a feed of a file history
7272                         if (!defined $file_name || $file_name ne $file) {
7273                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7274                                                              file_name=>$file, hash=>$commit),
7275                                               -title => "history"}, 'H');
7276                         }
7277                         $file = esc_path($file);
7278                         print "] ".
7279                               "$file</li>\n";
7280                 }
7281                 if ($format eq 'rss') {
7282                         print "</ul>]]>\n" .
7283                               "</content:encoded>\n" .
7284                               "</item>\n";
7285                 } elsif ($format eq 'atom') {
7286                         print "</ul>\n</div>\n" .
7287                               "</content>\n" .
7288                               "</entry>\n";
7289                 }
7290         }
7291
7292         # end of feed
7293         if ($format eq 'rss') {
7294                 print "</channel>\n</rss>\n";
7295         } elsif ($format eq 'atom') {
7296                 print "</feed>\n";
7297         }
7298 }
7299
7300 sub git_rss {
7301         git_feed('rss');
7302 }
7303
7304 sub git_atom {
7305         git_feed('atom');
7306 }
7307
7308 sub git_opml {
7309         my @list = git_get_projects_list();
7310
7311         print $cgi->header(
7312                 -type => 'text/xml',
7313                 -charset => 'utf-8',
7314                 -content_disposition => 'inline; filename="opml.xml"');
7315
7316         print <<XML;
7317 <?xml version="1.0" encoding="utf-8"?>
7318 <opml version="1.0">
7319 <head>
7320   <title>$site_name OPML Export</title>
7321 </head>
7322 <body>
7323 <outline text="git RSS feeds">
7324 XML
7325
7326         foreach my $pr (@list) {
7327                 my %proj = %$pr;
7328                 my $head = git_get_head_hash($proj{'path'});
7329                 if (!defined $head) {
7330                         next;
7331                 }
7332                 $git_dir = "$projectroot/$proj{'path'}";
7333                 my %co = parse_commit($head);
7334                 if (!%co) {
7335                         next;
7336                 }
7337
7338                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7339                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7340                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7341                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7342         }
7343         print <<XML;
7344 </outline>
7345 </body>
7346 </opml>
7347 XML
7348 }