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 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = $cgi->param($symbol);
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $file_name = $input_params{'file_name'};
 999         if (defined $file_name) {
1000                 if (!validate_pathname($file_name)) {
1001                         die_error(400, "Invalid file parameter");
1002                 }
1003         }
1004
1005         our $file_parent = $input_params{'file_parent'};
1006         if (defined $file_parent) {
1007                 if (!validate_pathname($file_parent)) {
1008                         die_error(400, "Invalid file parent parameter");
1009                 }
1010         }
1011
1012         # parameters which are refnames
1013         our $hash = $input_params{'hash'};
1014         if (defined $hash) {
1015                 if (!validate_refname($hash)) {
1016                         die_error(400, "Invalid hash parameter");
1017                 }
1018         }
1019
1020         our $hash_parent = $input_params{'hash_parent'};
1021         if (defined $hash_parent) {
1022                 if (!validate_refname($hash_parent)) {
1023                         die_error(400, "Invalid hash parent parameter");
1024                 }
1025         }
1026
1027         our $hash_base = $input_params{'hash_base'};
1028         if (defined $hash_base) {
1029                 if (!validate_refname($hash_base)) {
1030                         die_error(400, "Invalid hash base parameter");
1031                 }
1032         }
1033
1034         our @extra_options = @{$input_params{'extra_options'}};
1035         # @extra_options is always defined, since it can only be (currently) set from
1036         # CGI, and $cgi->param() returns the empty array in array context if the param
1037         # is not set
1038         foreach my $opt (@extra_options) {
1039                 if (not exists $allowed_options{$opt}) {
1040                         die_error(400, "Invalid option parameter");
1041                 }
1042                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1043                         die_error(400, "Invalid option parameter for this action");
1044                 }
1045         }
1046
1047         our $hash_parent_base = $input_params{'hash_parent_base'};
1048         if (defined $hash_parent_base) {
1049                 if (!validate_refname($hash_parent_base)) {
1050                         die_error(400, "Invalid hash parent base parameter");
1051                 }
1052         }
1053
1054         # other parameters
1055         our $page = $input_params{'page'};
1056         if (defined $page) {
1057                 if ($page =~ m/[^0-9]/) {
1058                         die_error(400, "Invalid page parameter");
1059                 }
1060         }
1061
1062         our $searchtype = $input_params{'searchtype'};
1063         if (defined $searchtype) {
1064                 if ($searchtype =~ m/[^a-z]/) {
1065                         die_error(400, "Invalid searchtype parameter");
1066                 }
1067         }
1068
1069         our $search_use_regexp = $input_params{'search_use_regexp'};
1070
1071         our $searchtext = $input_params{'searchtext'};
1072         our $search_regexp;
1073         if (defined $searchtext) {
1074                 if (length($searchtext) < 2) {
1075                         die_error(403, "At least two characters are required for search parameter");
1076                 }
1077                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1078         }
1079 }
1080
1081 # path to the current git repository
1082 our $git_dir;
1083 sub evaluate_git_dir {
1084         our $git_dir = "$projectroot/$project" if $project;
1085 }
1086
1087 our (@snapshot_fmts, $git_avatar);
1088 sub configure_gitweb_features {
1089         # list of supported snapshot formats
1090         our @snapshot_fmts = gitweb_get_feature('snapshot');
1091         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1092
1093         # check that the avatar feature is set to a known provider name,
1094         # and for each provider check if the dependencies are satisfied.
1095         # if the provider name is invalid or the dependencies are not met,
1096         # reset $git_avatar to the empty string.
1097         our ($git_avatar) = gitweb_get_feature('avatar');
1098         if ($git_avatar eq 'gravatar') {
1099                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1100         } elsif ($git_avatar eq 'picon') {
1101                 # no dependencies
1102         } else {
1103                 $git_avatar = '';
1104         }
1105 }
1106
1107 # custom error handler: 'die <message>' is Internal Server Error
1108 sub handle_errors_html {
1109         my $msg = shift; # it is already HTML escaped
1110
1111         # to avoid infinite loop where error occurs in die_error,
1112         # change handler to default handler, disabling handle_errors_html
1113         set_message("Error occured when inside die_error:\n$msg");
1114
1115         # you cannot jump out of die_error when called as error handler;
1116         # the subroutine set via CGI::Carp::set_message is called _after_
1117         # HTTP headers are already written, so it cannot write them itself
1118         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1119 }
1120 set_message(\&handle_errors_html);
1121
1122 # dispatch
1123 sub dispatch {
1124         if (!defined $action) {
1125                 if (defined $hash) {
1126                         $action = git_get_type($hash);
1127                 } elsif (defined $hash_base && defined $file_name) {
1128                         $action = git_get_type("$hash_base:$file_name");
1129                 } elsif (defined $project) {
1130                         $action = 'summary';
1131                 } else {
1132                         $action = 'project_list';
1133                 }
1134         }
1135         if (!defined($actions{$action})) {
1136                 die_error(400, "Unknown action");
1137         }
1138         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1139             !$project) {
1140                 die_error(400, "Project needed");
1141         }
1142         $actions{$action}->();
1143 }
1144
1145 sub reset_timer {
1146         our $t0 = [ gettimeofday() ]
1147                 if defined $t0;
1148         our $number_of_git_cmds = 0;
1149 }
1150
1151 our $first_request = 1;
1152 sub run_request {
1153         reset_timer();
1154
1155         evaluate_uri();
1156         if ($first_request) {
1157                 evaluate_gitweb_config();
1158                 evaluate_git_version();
1159         }
1160         if ($per_request_config) {
1161                 if (ref($per_request_config) eq 'CODE') {
1162                         $per_request_config->();
1163                 } elsif (!$first_request) {
1164                         evaluate_gitweb_config();
1165                 }
1166         }
1167         check_loadavg();
1168
1169         # $projectroot and $projects_list might be set in gitweb config file
1170         $projects_list ||= $projectroot;
1171
1172         evaluate_query_params();
1173         evaluate_path_info();
1174         evaluate_and_validate_params();
1175         evaluate_git_dir();
1176
1177         configure_gitweb_features();
1178
1179         dispatch();
1180 }
1181
1182 our $is_last_request = sub { 1 };
1183 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1184 our $CGI = 'CGI';
1185 our $cgi;
1186 sub configure_as_fcgi {
1187         require CGI::Fast;
1188         our $CGI = 'CGI::Fast';
1189
1190         my $request_number = 0;
1191         # let each child service 100 requests
1192         our $is_last_request = sub { ++$request_number > 100 };
1193 }
1194 sub evaluate_argv {
1195         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1196         configure_as_fcgi()
1197                 if $script_name =~ /\.fcgi$/;
1198
1199         return unless (@ARGV);
1200
1201         require Getopt::Long;
1202         Getopt::Long::GetOptions(
1203                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1204                 'nproc|n=i' => sub {
1205                         my ($arg, $val) = @_;
1206                         return unless eval { require FCGI::ProcManager; 1; };
1207                         my $proc_manager = FCGI::ProcManager->new({
1208                                 n_processes => $val,
1209                         });
1210                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1211                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1212                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1213                 },
1214         );
1215 }
1216
1217 sub run {
1218         evaluate_argv();
1219
1220         $first_request = 1;
1221         $pre_listen_hook->()
1222                 if $pre_listen_hook;
1223
1224  REQUEST:
1225         while ($cgi = $CGI->new()) {
1226                 $pre_dispatch_hook->()
1227                         if $pre_dispatch_hook;
1228
1229                 run_request();
1230
1231                 $post_dispatch_hook->()
1232                         if $post_dispatch_hook;
1233                 $first_request = 0;
1234
1235                 last REQUEST if ($is_last_request->());
1236         }
1237
1238  DONE_GITWEB:
1239         1;
1240 }
1241
1242 run();
1243
1244 if (defined caller) {
1245         # wrapped in a subroutine processing requests,
1246         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1247         return;
1248 } else {
1249         # pure CGI script, serving single request
1250         exit;
1251 }
1252
1253 ## ======================================================================
1254 ## action links
1255
1256 # possible values of extra options
1257 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1258 # -replay => 1      - start from a current view (replay with modifications)
1259 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1260 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1261 sub href {
1262         my %params = @_;
1263         # default is to use -absolute url() i.e. $my_uri
1264         my $href = $params{-full} ? $my_url : $my_uri;
1265
1266         # implicit -replay, must be first of implicit params
1267         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1268
1269         $params{'project'} = $project unless exists $params{'project'};
1270
1271         if ($params{-replay}) {
1272                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1273                         if (!exists $params{$name}) {
1274                                 $params{$name} = $input_params{$name};
1275                         }
1276                 }
1277         }
1278
1279         my $use_pathinfo = gitweb_check_feature('pathinfo');
1280         if (defined $params{'project'} &&
1281             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1282                 # try to put as many parameters as possible in PATH_INFO:
1283                 #   - project name
1284                 #   - action
1285                 #   - hash_parent or hash_parent_base:/file_parent
1286                 #   - hash or hash_base:/filename
1287                 #   - the snapshot_format as an appropriate suffix
1288
1289                 # When the script is the root DirectoryIndex for the domain,
1290                 # $href here would be something like http://gitweb.example.com/
1291                 # Thus, we strip any trailing / from $href, to spare us double
1292                 # slashes in the final URL
1293                 $href =~ s,/$,,;
1294
1295                 # Then add the project name, if present
1296                 $href .= "/".esc_path_info($params{'project'});
1297                 delete $params{'project'};
1298
1299                 # since we destructively absorb parameters, we keep this
1300                 # boolean that remembers if we're handling a snapshot
1301                 my $is_snapshot = $params{'action'} eq 'snapshot';
1302
1303                 # Summary just uses the project path URL, any other action is
1304                 # added to the URL
1305                 if (defined $params{'action'}) {
1306                         $href .= "/".esc_path_info($params{'action'})
1307                                 unless $params{'action'} eq 'summary';
1308                         delete $params{'action'};
1309                 }
1310
1311                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1312                 # stripping nonexistent or useless pieces
1313                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1314                         || $params{'hash_parent'} || $params{'hash'});
1315                 if (defined $params{'hash_base'}) {
1316                         if (defined $params{'hash_parent_base'}) {
1317                                 $href .= esc_path_info($params{'hash_parent_base'});
1318                                 # skip the file_parent if it's the same as the file_name
1319                                 if (defined $params{'file_parent'}) {
1320                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1321                                                 delete $params{'file_parent'};
1322                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1323                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1324                                                 delete $params{'file_parent'};
1325                                         }
1326                                 }
1327                                 $href .= "..";
1328                                 delete $params{'hash_parent'};
1329                                 delete $params{'hash_parent_base'};
1330                         } elsif (defined $params{'hash_parent'}) {
1331                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1332                                 delete $params{'hash_parent'};
1333                         }
1334
1335                         $href .= esc_path_info($params{'hash_base'});
1336                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1337                                 $href .= ":/".esc_path_info($params{'file_name'});
1338                                 delete $params{'file_name'};
1339                         }
1340                         delete $params{'hash'};
1341                         delete $params{'hash_base'};
1342                 } elsif (defined $params{'hash'}) {
1343                         $href .= esc_path_info($params{'hash'});
1344                         delete $params{'hash'};
1345                 }
1346
1347                 # If the action was a snapshot, we can absorb the
1348                 # snapshot_format parameter too
1349                 if ($is_snapshot) {
1350                         my $fmt = $params{'snapshot_format'};
1351                         # snapshot_format should always be defined when href()
1352                         # is called, but just in case some code forgets, we
1353                         # fall back to the default
1354                         $fmt ||= $snapshot_fmts[0];
1355                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1356                         delete $params{'snapshot_format'};
1357                 }
1358         }
1359
1360         # now encode the parameters explicitly
1361         my @result = ();
1362         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1363                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1364                 if (defined $params{$name}) {
1365                         if (ref($params{$name}) eq "ARRAY") {
1366                                 foreach my $par (@{$params{$name}}) {
1367                                         push @result, $symbol . "=" . esc_param($par);
1368                                 }
1369                         } else {
1370                                 push @result, $symbol . "=" . esc_param($params{$name});
1371                         }
1372                 }
1373         }
1374         $href .= "?" . join(';', @result) if scalar @result;
1375
1376         # final transformation: trailing spaces must be escaped (URI-encoded)
1377         $href =~ s/(\s+)$/CGI::escape($1)/e;
1378
1379         if ($params{-anchor}) {
1380                 $href .= "#".esc_param($params{-anchor});
1381         }
1382
1383         return $href;
1384 }
1385
1386
1387 ## ======================================================================
1388 ## validation, quoting/unquoting and escaping
1389
1390 sub validate_action {
1391         my $input = shift || return undef;
1392         return undef unless exists $actions{$input};
1393         return $input;
1394 }
1395
1396 sub validate_project {
1397         my $input = shift || return undef;
1398         if (!validate_pathname($input) ||
1399                 !(-d "$projectroot/$input") ||
1400                 !check_export_ok("$projectroot/$input") ||
1401                 ($strict_export && !project_in_list($input))) {
1402                 return undef;
1403         } else {
1404                 return $input;
1405         }
1406 }
1407
1408 sub validate_pathname {
1409         my $input = shift || return undef;
1410
1411         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1412         # at the beginning, at the end, and between slashes.
1413         # also this catches doubled slashes
1414         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1415                 return undef;
1416         }
1417         # no null characters
1418         if ($input =~ m!\0!) {
1419                 return undef;
1420         }
1421         return $input;
1422 }
1423
1424 sub validate_refname {
1425         my $input = shift || return undef;
1426
1427         # textual hashes are O.K.
1428         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1429                 return $input;
1430         }
1431         # it must be correct pathname
1432         $input = validate_pathname($input)
1433                 or return undef;
1434         # restrictions on ref name according to git-check-ref-format
1435         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1436                 return undef;
1437         }
1438         return $input;
1439 }
1440
1441 # decode sequences of octets in utf8 into Perl's internal form,
1442 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1443 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1444 sub to_utf8 {
1445         my $str = shift;
1446         return undef unless defined $str;
1447         if (utf8::valid($str)) {
1448                 utf8::decode($str);
1449                 return $str;
1450         } else {
1451                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1452         }
1453 }
1454
1455 # quote unsafe chars, but keep the slash, even when it's not
1456 # correct, but quoted slashes look too horrible in bookmarks
1457 sub esc_param {
1458         my $str = shift;
1459         return undef unless defined $str;
1460         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1461         $str =~ s/ /\+/g;
1462         return $str;
1463 }
1464
1465 # the quoting rules for path_info fragment are slightly different
1466 sub esc_path_info {
1467         my $str = shift;
1468         return undef unless defined $str;
1469
1470         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1471         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1472
1473         return $str;
1474 }
1475
1476 # quote unsafe chars in whole URL, so some characters cannot be quoted
1477 sub esc_url {
1478         my $str = shift;
1479         return undef unless defined $str;
1480         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1481         $str =~ s/ /\+/g;
1482         return $str;
1483 }
1484
1485 # quote unsafe characters in HTML attributes
1486 sub esc_attr {
1487
1488         # for XHTML conformance escaping '"' to '&quot;' is not enough
1489         return esc_html(@_);
1490 }
1491
1492 # replace invalid utf8 character with SUBSTITUTION sequence
1493 sub esc_html {
1494         my $str = shift;
1495         my %opts = @_;
1496
1497         return undef unless defined $str;
1498
1499         $str = to_utf8($str);
1500         $str = $cgi->escapeHTML($str);
1501         if ($opts{'-nbsp'}) {
1502                 $str =~ s/ /&nbsp;/g;
1503         }
1504         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1505         return $str;
1506 }
1507
1508 # quote control characters and escape filename to HTML
1509 sub esc_path {
1510         my $str = shift;
1511         my %opts = @_;
1512
1513         return undef unless defined $str;
1514
1515         $str = to_utf8($str);
1516         $str = $cgi->escapeHTML($str);
1517         if ($opts{'-nbsp'}) {
1518                 $str =~ s/ /&nbsp;/g;
1519         }
1520         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1521         return $str;
1522 }
1523
1524 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1525 sub sanitize {
1526         my $str = shift;
1527
1528         return undef unless defined $str;
1529
1530         $str = to_utf8($str);
1531         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1532         return $str;
1533 }
1534
1535 # Make control characters "printable", using character escape codes (CEC)
1536 sub quot_cec {
1537         my $cntrl = shift;
1538         my %opts = @_;
1539         my %es = ( # character escape codes, aka escape sequences
1540                 "\t" => '\t',   # tab            (HT)
1541                 "\n" => '\n',   # line feed      (LF)
1542                 "\r" => '\r',   # carrige return (CR)
1543                 "\f" => '\f',   # form feed      (FF)
1544                 "\b" => '\b',   # backspace      (BS)
1545                 "\a" => '\a',   # alarm (bell)   (BEL)
1546                 "\e" => '\e',   # escape         (ESC)
1547                 "\013" => '\v', # vertical tab   (VT)
1548                 "\000" => '\0', # nul character  (NUL)
1549         );
1550         my $chr = ( (exists $es{$cntrl})
1551                     ? $es{$cntrl}
1552                     : sprintf('\%2x', ord($cntrl)) );
1553         if ($opts{-nohtml}) {
1554                 return $chr;
1555         } else {
1556                 return "<span class=\"cntrl\">$chr</span>";
1557         }
1558 }
1559
1560 # Alternatively use unicode control pictures codepoints,
1561 # Unicode "printable representation" (PR)
1562 sub quot_upr {
1563         my $cntrl = shift;
1564         my %opts = @_;
1565
1566         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1567         if ($opts{-nohtml}) {
1568                 return $chr;
1569         } else {
1570                 return "<span class=\"cntrl\">$chr</span>";
1571         }
1572 }
1573
1574 # git may return quoted and escaped filenames
1575 sub unquote {
1576         my $str = shift;
1577
1578         sub unq {
1579                 my $seq = shift;
1580                 my %es = ( # character escape codes, aka escape sequences
1581                         't' => "\t",   # tab            (HT, TAB)
1582                         'n' => "\n",   # newline        (NL)
1583                         'r' => "\r",   # return         (CR)
1584                         'f' => "\f",   # form feed      (FF)
1585                         'b' => "\b",   # backspace      (BS)
1586                         'a' => "\a",   # alarm (bell)   (BEL)
1587                         'e' => "\e",   # escape         (ESC)
1588                         'v' => "\013", # vertical tab   (VT)
1589                 );
1590
1591                 if ($seq =~ m/^[0-7]{1,3}$/) {
1592                         # octal char sequence
1593                         return chr(oct($seq));
1594                 } elsif (exists $es{$seq}) {
1595                         # C escape sequence, aka character escape code
1596                         return $es{$seq};
1597                 }
1598                 # quoted ordinary character
1599                 return $seq;
1600         }
1601
1602         if ($str =~ m/^"(.*)"$/) {
1603                 # needs unquoting
1604                 $str = $1;
1605                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1606         }
1607         return $str;
1608 }
1609
1610 # escape tabs (convert tabs to spaces)
1611 sub untabify {
1612         my $line = shift;
1613
1614         while ((my $pos = index($line, "\t")) != -1) {
1615                 if (my $count = (8 - ($pos % 8))) {
1616                         my $spaces = ' ' x $count;
1617                         $line =~ s/\t/$spaces/;
1618                 }
1619         }
1620
1621         return $line;
1622 }
1623
1624 sub project_in_list {
1625         my $project = shift;
1626         my @list = git_get_projects_list();
1627         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1628 }
1629
1630 ## ----------------------------------------------------------------------
1631 ## HTML aware string manipulation
1632
1633 # Try to chop given string on a word boundary between position
1634 # $len and $len+$add_len. If there is no word boundary there,
1635 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1636 # (marking chopped part) would be longer than given string.
1637 sub chop_str {
1638         my $str = shift;
1639         my $len = shift;
1640         my $add_len = shift || 10;
1641         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1642
1643         # Make sure perl knows it is utf8 encoded so we don't
1644         # cut in the middle of a utf8 multibyte char.
1645         $str = to_utf8($str);
1646
1647         # allow only $len chars, but don't cut a word if it would fit in $add_len
1648         # if it doesn't fit, cut it if it's still longer than the dots we would add
1649         # remove chopped character entities entirely
1650
1651         # when chopping in the middle, distribute $len into left and right part
1652         # return early if chopping wouldn't make string shorter
1653         if ($where eq 'center') {
1654                 return $str if ($len + 5 >= length($str)); # filler is length 5
1655                 $len = int($len/2);
1656         } else {
1657                 return $str if ($len + 4 >= length($str)); # filler is length 4
1658         }
1659
1660         # regexps: ending and beginning with word part up to $add_len
1661         my $endre = qr/.{$len}\w{0,$add_len}/;
1662         my $begre = qr/\w{0,$add_len}.{$len}/;
1663
1664         if ($where eq 'left') {
1665                 $str =~ m/^(.*?)($begre)$/;
1666                 my ($lead, $body) = ($1, $2);
1667                 if (length($lead) > 4) {
1668                         $lead = " ...";
1669                 }
1670                 return "$lead$body";
1671
1672         } elsif ($where eq 'center') {
1673                 $str =~ m/^($endre)(.*)$/;
1674                 my ($left, $str)  = ($1, $2);
1675                 $str =~ m/^(.*?)($begre)$/;
1676                 my ($mid, $right) = ($1, $2);
1677                 if (length($mid) > 5) {
1678                         $mid = " ... ";
1679                 }
1680                 return "$left$mid$right";
1681
1682         } else {
1683                 $str =~ m/^($endre)(.*)$/;
1684                 my $body = $1;
1685                 my $tail = $2;
1686                 if (length($tail) > 4) {
1687                         $tail = "... ";
1688                 }
1689                 return "$body$tail";
1690         }
1691 }
1692
1693 # takes the same arguments as chop_str, but also wraps a <span> around the
1694 # result with a title attribute if it does get chopped. Additionally, the
1695 # string is HTML-escaped.
1696 sub chop_and_escape_str {
1697         my ($str) = @_;
1698
1699         my $chopped = chop_str(@_);
1700         if ($chopped eq $str) {
1701                 return esc_html($chopped);
1702         } else {
1703                 $str =~ s/[[:cntrl:]]/?/g;
1704                 return $cgi->span({-title=>$str}, esc_html($chopped));
1705         }
1706 }
1707
1708 ## ----------------------------------------------------------------------
1709 ## functions returning short strings
1710
1711 # CSS class for given age value (in seconds)
1712 sub age_class {
1713         my $age = shift;
1714
1715         if (!defined $age) {
1716                 return "noage";
1717         } elsif ($age < 60*60*2) {
1718                 return "age0";
1719         } elsif ($age < 60*60*24*2) {
1720                 return "age1";
1721         } else {
1722                 return "age2";
1723         }
1724 }
1725
1726 # convert age in seconds to "nn units ago" string
1727 sub age_string {
1728         my $age = shift;
1729         my $age_str;
1730
1731         if ($age > 60*60*24*365*2) {
1732                 $age_str = (int $age/60/60/24/365);
1733                 $age_str .= " years ago";
1734         } elsif ($age > 60*60*24*(365/12)*2) {
1735                 $age_str = int $age/60/60/24/(365/12);
1736                 $age_str .= " months ago";
1737         } elsif ($age > 60*60*24*7*2) {
1738                 $age_str = int $age/60/60/24/7;
1739                 $age_str .= " weeks ago";
1740         } elsif ($age > 60*60*24*2) {
1741                 $age_str = int $age/60/60/24;
1742                 $age_str .= " days ago";
1743         } elsif ($age > 60*60*2) {
1744                 $age_str = int $age/60/60;
1745                 $age_str .= " hours ago";
1746         } elsif ($age > 60*2) {
1747                 $age_str = int $age/60;
1748                 $age_str .= " min ago";
1749         } elsif ($age > 2) {
1750                 $age_str = int $age;
1751                 $age_str .= " sec ago";
1752         } else {
1753                 $age_str .= " right now";
1754         }
1755         return $age_str;
1756 }
1757
1758 use constant {
1759         S_IFINVALID => 0030000,
1760         S_IFGITLINK => 0160000,
1761 };
1762
1763 # submodule/subproject, a commit object reference
1764 sub S_ISGITLINK {
1765         my $mode = shift;
1766
1767         return (($mode & S_IFMT) == S_IFGITLINK)
1768 }
1769
1770 # convert file mode in octal to symbolic file mode string
1771 sub mode_str {
1772         my $mode = oct shift;
1773
1774         if (S_ISGITLINK($mode)) {
1775                 return 'm---------';
1776         } elsif (S_ISDIR($mode & S_IFMT)) {
1777                 return 'drwxr-xr-x';
1778         } elsif (S_ISLNK($mode)) {
1779                 return 'lrwxrwxrwx';
1780         } elsif (S_ISREG($mode)) {
1781                 # git cares only about the executable bit
1782                 if ($mode & S_IXUSR) {
1783                         return '-rwxr-xr-x';
1784                 } else {
1785                         return '-rw-r--r--';
1786                 };
1787         } else {
1788                 return '----------';
1789         }
1790 }
1791
1792 # convert file mode in octal to file type string
1793 sub file_type {
1794         my $mode = shift;
1795
1796         if ($mode !~ m/^[0-7]+$/) {
1797                 return $mode;
1798         } else {
1799                 $mode = oct $mode;
1800         }
1801
1802         if (S_ISGITLINK($mode)) {
1803                 return "submodule";
1804         } elsif (S_ISDIR($mode & S_IFMT)) {
1805                 return "directory";
1806         } elsif (S_ISLNK($mode)) {
1807                 return "symlink";
1808         } elsif (S_ISREG($mode)) {
1809                 return "file";
1810         } else {
1811                 return "unknown";
1812         }
1813 }
1814
1815 # convert file mode in octal to file type description string
1816 sub file_type_long {
1817         my $mode = shift;
1818
1819         if ($mode !~ m/^[0-7]+$/) {
1820                 return $mode;
1821         } else {
1822                 $mode = oct $mode;
1823         }
1824
1825         if (S_ISGITLINK($mode)) {
1826                 return "submodule";
1827         } elsif (S_ISDIR($mode & S_IFMT)) {
1828                 return "directory";
1829         } elsif (S_ISLNK($mode)) {
1830                 return "symlink";
1831         } elsif (S_ISREG($mode)) {
1832                 if ($mode & S_IXUSR) {
1833                         return "executable";
1834                 } else {
1835                         return "file";
1836                 };
1837         } else {
1838                 return "unknown";
1839         }
1840 }
1841
1842
1843 ## ----------------------------------------------------------------------
1844 ## functions returning short HTML fragments, or transforming HTML fragments
1845 ## which don't belong to other sections
1846
1847 # format line of commit message.
1848 sub format_log_line_html {
1849         my $line = shift;
1850
1851         $line = esc_html($line, -nbsp=>1);
1852         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1853                 $cgi->a({-href => href(action=>"object", hash=>$1),
1854                                         -class => "text"}, $1);
1855         }eg;
1856
1857         return $line;
1858 }
1859
1860 # format marker of refs pointing to given object
1861
1862 # the destination action is chosen based on object type and current context:
1863 # - for annotated tags, we choose the tag view unless it's the current view
1864 #   already, in which case we go to shortlog view
1865 # - for other refs, we keep the current view if we're in history, shortlog or
1866 #   log view, and select shortlog otherwise
1867 sub format_ref_marker {
1868         my ($refs, $id) = @_;
1869         my $markers = '';
1870
1871         if (defined $refs->{$id}) {
1872                 foreach my $ref (@{$refs->{$id}}) {
1873                         # this code exploits the fact that non-lightweight tags are the
1874                         # only indirect objects, and that they are the only objects for which
1875                         # we want to use tag instead of shortlog as action
1876                         my ($type, $name) = qw();
1877                         my $indirect = ($ref =~ s/\^\{\}$//);
1878                         # e.g. tags/v2.6.11 or heads/next
1879                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1880                                 $type = $1;
1881                                 $name = $2;
1882                         } else {
1883                                 $type = "ref";
1884                                 $name = $ref;
1885                         }
1886
1887                         my $class = $type;
1888                         $class .= " indirect" if $indirect;
1889
1890                         my $dest_action = "shortlog";
1891
1892                         if ($indirect) {
1893                                 $dest_action = "tag" unless $action eq "tag";
1894                         } elsif ($action =~ /^(history|(short)?log)$/) {
1895                                 $dest_action = $action;
1896                         }
1897
1898                         my $dest = "";
1899                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1900                         $dest .= $ref;
1901
1902                         my $link = $cgi->a({
1903                                 -href => href(
1904                                         action=>$dest_action,
1905                                         hash=>$dest
1906                                 )}, $name);
1907
1908                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1909                                 $link . "</span>";
1910                 }
1911         }
1912
1913         if ($markers) {
1914                 return ' <span class="refs">'. $markers . '</span>';
1915         } else {
1916                 return "";
1917         }
1918 }
1919
1920 # format, perhaps shortened and with markers, title line
1921 sub format_subject_html {
1922         my ($long, $short, $href, $extra) = @_;
1923         $extra = '' unless defined($extra);
1924
1925         if (length($short) < length($long)) {
1926                 $long =~ s/[[:cntrl:]]/?/g;
1927                 return $cgi->a({-href => $href, -class => "list subject",
1928                                 -title => to_utf8($long)},
1929                        esc_html($short)) . $extra;
1930         } else {
1931                 return $cgi->a({-href => $href, -class => "list subject"},
1932                        esc_html($long)) . $extra;
1933         }
1934 }
1935
1936 # Rather than recomputing the url for an email multiple times, we cache it
1937 # after the first hit. This gives a visible benefit in views where the avatar
1938 # for the same email is used repeatedly (e.g. shortlog).
1939 # The cache is shared by all avatar engines (currently gravatar only), which
1940 # are free to use it as preferred. Since only one avatar engine is used for any
1941 # given page, there's no risk for cache conflicts.
1942 our %avatar_cache = ();
1943
1944 # Compute the picon url for a given email, by using the picon search service over at
1945 # http://www.cs.indiana.edu/picons/search.html
1946 sub picon_url {
1947         my $email = lc shift;
1948         if (!$avatar_cache{$email}) {
1949                 my ($user, $domain) = split('@', $email);
1950                 $avatar_cache{$email} =
1951                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1952                         "$domain/$user/" .
1953                         "users+domains+unknown/up/single";
1954         }
1955         return $avatar_cache{$email};
1956 }
1957
1958 # Compute the gravatar url for a given email, if it's not in the cache already.
1959 # Gravatar stores only the part of the URL before the size, since that's the
1960 # one computationally more expensive. This also allows reuse of the cache for
1961 # different sizes (for this particular engine).
1962 sub gravatar_url {
1963         my $email = lc shift;
1964         my $size = shift;
1965         $avatar_cache{$email} ||=
1966                 "http://www.gravatar.com/avatar/" .
1967                         Digest::MD5::md5_hex($email) . "?s=";
1968         return $avatar_cache{$email} . $size;
1969 }
1970
1971 # Insert an avatar for the given $email at the given $size if the feature
1972 # is enabled.
1973 sub git_get_avatar {
1974         my ($email, %opts) = @_;
1975         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1976         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1977         $opts{-size} ||= 'default';
1978         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1979         my $url = "";
1980         if ($git_avatar eq 'gravatar') {
1981                 $url = gravatar_url($email, $size);
1982         } elsif ($git_avatar eq 'picon') {
1983                 $url = picon_url($email);
1984         }
1985         # Other providers can be added by extending the if chain, defining $url
1986         # as needed. If no variant puts something in $url, we assume avatars
1987         # are completely disabled/unavailable.
1988         if ($url) {
1989                 return $pre_white .
1990                        "<img width=\"$size\" " .
1991                             "class=\"avatar\" " .
1992                             "src=\"".esc_url($url)."\" " .
1993                             "alt=\"\" " .
1994                        "/>" . $post_white;
1995         } else {
1996                 return "";
1997         }
1998 }
1999
2000 sub format_search_author {
2001         my ($author, $searchtype, $displaytext) = @_;
2002         my $have_search = gitweb_check_feature('search');
2003
2004         if ($have_search) {
2005                 my $performed = "";
2006                 if ($searchtype eq 'author') {
2007                         $performed = "authored";
2008                 } elsif ($searchtype eq 'committer') {
2009                         $performed = "committed";
2010                 }
2011
2012                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2013                                 searchtext=>$author,
2014                                 searchtype=>$searchtype), class=>"list",
2015                                 title=>"Search for commits $performed by $author"},
2016                                 $displaytext);
2017
2018         } else {
2019                 return $displaytext;
2020         }
2021 }
2022
2023 # format the author name of the given commit with the given tag
2024 # the author name is chopped and escaped according to the other
2025 # optional parameters (see chop_str).
2026 sub format_author_html {
2027         my $tag = shift;
2028         my $co = shift;
2029         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2030         return "<$tag class=\"author\">" .
2031                format_search_author($co->{'author_name'}, "author",
2032                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2033                        $author) .
2034                "</$tag>";
2035 }
2036
2037 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2038 sub format_git_diff_header_line {
2039         my $line = shift;
2040         my $diffinfo = shift;
2041         my ($from, $to) = @_;
2042
2043         if ($diffinfo->{'nparents'}) {
2044                 # combined diff
2045                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2046                 if ($to->{'href'}) {
2047                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2048                                          esc_path($to->{'file'}));
2049                 } else { # file was deleted (no href)
2050                         $line .= esc_path($to->{'file'});
2051                 }
2052         } else {
2053                 # "ordinary" diff
2054                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2055                 if ($from->{'href'}) {
2056                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2057                                          'a/' . esc_path($from->{'file'}));
2058                 } else { # file was added (no href)
2059                         $line .= 'a/' . esc_path($from->{'file'});
2060                 }
2061                 $line .= ' ';
2062                 if ($to->{'href'}) {
2063                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2064                                          'b/' . esc_path($to->{'file'}));
2065                 } else { # file was deleted
2066                         $line .= 'b/' . esc_path($to->{'file'});
2067                 }
2068         }
2069
2070         return "<div class=\"diff header\">$line</div>\n";
2071 }
2072
2073 # format extended diff header line, before patch itself
2074 sub format_extended_diff_header_line {
2075         my $line = shift;
2076         my $diffinfo = shift;
2077         my ($from, $to) = @_;
2078
2079         # match <path>
2080         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2081                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2082                                        esc_path($from->{'file'}));
2083         }
2084         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2085                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2086                                  esc_path($to->{'file'}));
2087         }
2088         # match single <mode>
2089         if ($line =~ m/\s(\d{6})$/) {
2090                 $line .= '<span class="info"> (' .
2091                          file_type_long($1) .
2092                          ')</span>';
2093         }
2094         # match <hash>
2095         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2096                 # can match only for combined diff
2097                 $line = 'index ';
2098                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2101                                                   -class=>"hash"},
2102                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2103                         } else {
2104                                 $line .= '0' x 7;
2105                         }
2106                         # separator
2107                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2108                 }
2109                 $line .= '..';
2110                 if ($to->{'href'}) {
2111                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2112                                          substr($diffinfo->{'to_id'},0,7));
2113                 } else {
2114                         $line .= '0' x 7;
2115                 }
2116
2117         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2118                 # can match only for ordinary diff
2119                 my ($from_link, $to_link);
2120                 if ($from->{'href'}) {
2121                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2122                                              substr($diffinfo->{'from_id'},0,7));
2123                 } else {
2124                         $from_link = '0' x 7;
2125                 }
2126                 if ($to->{'href'}) {
2127                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2128                                            substr($diffinfo->{'to_id'},0,7));
2129                 } else {
2130                         $to_link = '0' x 7;
2131                 }
2132                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2133                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2134         }
2135
2136         return $line . "<br/>\n";
2137 }
2138
2139 # format from-file/to-file diff header
2140 sub format_diff_from_to_header {
2141         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2142         my $line;
2143         my $result = '';
2144
2145         $line = $from_line;
2146         #assert($line =~ m/^---/) if DEBUG;
2147         # no extra formatting for "^--- /dev/null"
2148         if (! $diffinfo->{'nparents'}) {
2149                 # ordinary (single parent) diff
2150                 if ($line =~ m!^--- "?a/!) {
2151                         if ($from->{'href'}) {
2152                                 $line = '--- a/' .
2153                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2154                                                 esc_path($from->{'file'}));
2155                         } else {
2156                                 $line = '--- a/' .
2157                                         esc_path($from->{'file'});
2158                         }
2159                 }
2160                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2161
2162         } else {
2163                 # combined diff (merge commit)
2164                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2165                         if ($from->{'href'}[$i]) {
2166                                 $line = '--- ' .
2167                                         $cgi->a({-href=>href(action=>"blobdiff",
2168                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2169                                                              hash_parent_base=>$parents[$i],
2170                                                              file_parent=>$from->{'file'}[$i],
2171                                                              hash=>$diffinfo->{'to_id'},
2172                                                              hash_base=>$hash,
2173                                                              file_name=>$to->{'file'}),
2174                                                  -class=>"path",
2175                                                  -title=>"diff" . ($i+1)},
2176                                                 $i+1) .
2177                                         '/' .
2178                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2179                                                 esc_path($from->{'file'}[$i]));
2180                         } else {
2181                                 $line = '--- /dev/null';
2182                         }
2183                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2184                 }
2185         }
2186
2187         $line = $to_line;
2188         #assert($line =~ m/^\+\+\+/) if DEBUG;
2189         # no extra formatting for "^+++ /dev/null"
2190         if ($line =~ m!^\+\+\+ "?b/!) {
2191                 if ($to->{'href'}) {
2192                         $line = '+++ b/' .
2193                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2194                                         esc_path($to->{'file'}));
2195                 } else {
2196                         $line = '+++ b/' .
2197                                 esc_path($to->{'file'});
2198                 }
2199         }
2200         $result .= qq!<div class="diff to_file">$line</div>\n!;
2201
2202         return $result;
2203 }
2204
2205 # create note for patch simplified by combined diff
2206 sub format_diff_cc_simplified {
2207         my ($diffinfo, @parents) = @_;
2208         my $result = '';
2209
2210         $result .= "<div class=\"diff header\">" .
2211                    "diff --cc ";
2212         if (!is_deleted($diffinfo)) {
2213                 $result .= $cgi->a({-href => href(action=>"blob",
2214                                                   hash_base=>$hash,
2215                                                   hash=>$diffinfo->{'to_id'},
2216                                                   file_name=>$diffinfo->{'to_file'}),
2217                                     -class => "path"},
2218                                    esc_path($diffinfo->{'to_file'}));
2219         } else {
2220                 $result .= esc_path($diffinfo->{'to_file'});
2221         }
2222         $result .= "</div>\n" . # class="diff header"
2223                    "<div class=\"diff nodifferences\">" .
2224                    "Simple merge" .
2225                    "</div>\n"; # class="diff nodifferences"
2226
2227         return $result;
2228 }
2229
2230 sub diff_line_class {
2231         my ($line, $from, $to) = @_;
2232
2233         # ordinary diff
2234         my $num_sign = 1;
2235         # combined diff
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 $num_sign = scalar @{$from->{'href'}};
2238         }
2239
2240         my @diff_line_classifier = (
2241                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2242                 { regexp => qr/^\\/,               class => "incomplete"  },
2243                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2244                 # classifier for context must come before classifier add/rem,
2245                 # or we would have to use more complicated regexp, for example
2246                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2247                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2248                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2249         );
2250         for my $clsfy (@diff_line_classifier) {
2251                 return $clsfy->{'class'}
2252                         if ($line =~ $clsfy->{'regexp'});
2253         }
2254
2255         # fallback
2256         return "";
2257 }
2258
2259 # assumes that $from and $to are defined and correctly filled,
2260 # and that $line holds a line of chunk header for unified diff
2261 sub format_unidiff_chunk_header {
2262         my ($line, $from, $to) = @_;
2263
2264         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2265                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2266
2267         $from_lines = 0 unless defined $from_lines;
2268         $to_lines   = 0 unless defined $to_lines;
2269
2270         if ($from->{'href'}) {
2271                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2272                                      -class=>"list"}, $from_text);
2273         }
2274         if ($to->{'href'}) {
2275                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                      -class=>"list"}, $to_text);
2277         }
2278         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2279                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2280         return $line;
2281 }
2282
2283 # assumes that $from and $to are defined and correctly filled,
2284 # and that $line holds a line of chunk header for combined diff
2285 sub format_cc_diff_chunk_header {
2286         my ($line, $from, $to) = @_;
2287
2288         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2289         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2290
2291         @from_text = split(' ', $ranges);
2292         for (my $i = 0; $i < @from_text; ++$i) {
2293                 ($from_start[$i], $from_nlines[$i]) =
2294                         (split(',', substr($from_text[$i], 1)), 0);
2295         }
2296
2297         $to_text   = pop @from_text;
2298         $to_start  = pop @from_start;
2299         $to_nlines = pop @from_nlines;
2300
2301         $line = "<span class=\"chunk_info\">$prefix ";
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 if ($from->{'href'}[$i]) {
2304                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2305                                           -class=>"list"}, $from_text[$i]);
2306                 } else {
2307                         $line .= $from_text[$i];
2308                 }
2309                 $line .= " ";
2310         }
2311         if ($to->{'href'}) {
2312                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2313                                   -class=>"list"}, $to_text);
2314         } else {
2315                 $line .= $to_text;
2316         }
2317         $line .= " $prefix</span>" .
2318                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2319         return $line;
2320 }
2321
2322 # process patch (diff) line (not to be used for diff headers),
2323 # returning class and HTML-formatted (but not wrapped) line
2324 sub process_diff_line {
2325         my $line = shift;
2326         my ($from, $to) = @_;
2327
2328         my $diff_class = diff_line_class($line, $from, $to);
2329
2330         chomp $line;
2331         $line = untabify($line);
2332
2333         if ($from && $to && $line =~ m/^\@{2} /) {
2334                 $line = format_unidiff_chunk_header($line, $from, $to);
2335                 return $diff_class, $line;
2336
2337         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2338                 $line = format_cc_diff_chunk_header($line, $from, $to);
2339                 return $diff_class, $line;
2340
2341         }
2342         return $diff_class, esc_html($line, -nbsp=>1);
2343 }
2344
2345 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2346 # linked.  Pass the hash of the tree/commit to snapshot.
2347 sub format_snapshot_links {
2348         my ($hash) = @_;
2349         my $num_fmts = @snapshot_fmts;
2350         if ($num_fmts > 1) {
2351                 # A parenthesized list of links bearing format names.
2352                 # e.g. "snapshot (_tar.gz_ _zip_)"
2353                 return "snapshot (" . join(' ', map
2354                         $cgi->a({
2355                                 -href => href(
2356                                         action=>"snapshot",
2357                                         hash=>$hash,
2358                                         snapshot_format=>$_
2359                                 )
2360                         }, $known_snapshot_formats{$_}{'display'})
2361                 , @snapshot_fmts) . ")";
2362         } elsif ($num_fmts == 1) {
2363                 # A single "snapshot" link whose tooltip bears the format name.
2364                 # i.e. "_snapshot_"
2365                 my ($fmt) = @snapshot_fmts;
2366                 return
2367                         $cgi->a({
2368                                 -href => href(
2369                                         action=>"snapshot",
2370                                         hash=>$hash,
2371                                         snapshot_format=>$fmt
2372                                 ),
2373                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2374                         }, "snapshot");
2375         } else { # $num_fmts == 0
2376                 return undef;
2377         }
2378 }
2379
2380 ## ......................................................................
2381 ## functions returning values to be passed, perhaps after some
2382 ## transformation, to other functions; e.g. returning arguments to href()
2383
2384 # returns hash to be passed to href to generate gitweb URL
2385 # in -title key it returns description of link
2386 sub get_feed_info {
2387         my $format = shift || 'Atom';
2388         my %res = (action => lc($format));
2389
2390         # feed links are possible only for project views
2391         return unless (defined $project);
2392         # some views should link to OPML, or to generic project feed,
2393         # or don't have specific feed yet (so they should use generic)
2394         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2395
2396         my $branch;
2397         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2398         # from tag links; this also makes possible to detect branch links
2399         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2400             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2401                 $branch = $1;
2402         }
2403         # find log type for feed description (title)
2404         my $type = 'log';
2405         if (defined $file_name) {
2406                 $type  = "history of $file_name";
2407                 $type .= "/" if ($action eq 'tree');
2408                 $type .= " on '$branch'" if (defined $branch);
2409         } else {
2410                 $type = "log of $branch" if (defined $branch);
2411         }
2412
2413         $res{-title} = $type;
2414         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2415         $res{'file_name'} = $file_name;
2416
2417         return %res;
2418 }
2419
2420 ## ----------------------------------------------------------------------
2421 ## git utility subroutines, invoking git commands
2422
2423 # returns path to the core git executable and the --git-dir parameter as list
2424 sub git_cmd {
2425         $number_of_git_cmds++;
2426         return $GIT, '--git-dir='.$git_dir;
2427 }
2428
2429 # quote the given arguments for passing them to the shell
2430 # quote_command("command", "arg 1", "arg with ' and ! characters")
2431 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2432 # Try to avoid using this function wherever possible.
2433 sub quote_command {
2434         return join(' ',
2435                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2436 }
2437
2438 # get HEAD ref of given project as hash
2439 sub git_get_head_hash {
2440         return git_get_full_hash(shift, 'HEAD');
2441 }
2442
2443 sub git_get_full_hash {
2444         return git_get_hash(@_);
2445 }
2446
2447 sub git_get_short_hash {
2448         return git_get_hash(@_, '--short=7');
2449 }
2450
2451 sub git_get_hash {
2452         my ($project, $hash, @options) = @_;
2453         my $o_git_dir = $git_dir;
2454         my $retval = undef;
2455         $git_dir = "$projectroot/$project";
2456         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2457             '--verify', '-q', @options, $hash) {
2458                 $retval = <$fd>;
2459                 chomp $retval if defined $retval;
2460                 close $fd;
2461         }
2462         if (defined $o_git_dir) {
2463                 $git_dir = $o_git_dir;
2464         }
2465         return $retval;
2466 }
2467
2468 # get type of given object
2469 sub git_get_type {
2470         my $hash = shift;
2471
2472         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2473         my $type = <$fd>;
2474         close $fd or return;
2475         chomp $type;
2476         return $type;
2477 }
2478
2479 # repository configuration
2480 our $config_file = '';
2481 our %config;
2482
2483 # store multiple values for single key as anonymous array reference
2484 # single values stored directly in the hash, not as [ <value> ]
2485 sub hash_set_multi {
2486         my ($hash, $key, $value) = @_;
2487
2488         if (!exists $hash->{$key}) {
2489                 $hash->{$key} = $value;
2490         } elsif (!ref $hash->{$key}) {
2491                 $hash->{$key} = [ $hash->{$key}, $value ];
2492         } else {
2493                 push @{$hash->{$key}}, $value;
2494         }
2495 }
2496
2497 # return hash of git project configuration
2498 # optionally limited to some section, e.g. 'gitweb'
2499 sub git_parse_project_config {
2500         my $section_regexp = shift;
2501         my %config;
2502
2503         local $/ = "\0";
2504
2505         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2506                 or return;
2507
2508         while (my $keyval = <$fh>) {
2509                 chomp $keyval;
2510                 my ($key, $value) = split(/\n/, $keyval, 2);
2511
2512                 hash_set_multi(\%config, $key, $value)
2513                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2514         }
2515         close $fh;
2516
2517         return %config;
2518 }
2519
2520 # convert config value to boolean: 'true' or 'false'
2521 # no value, number > 0, 'true' and 'yes' values are true
2522 # rest of values are treated as false (never as error)
2523 sub config_to_bool {
2524         my $val = shift;
2525
2526         return 1 if !defined $val;             # section.key
2527
2528         # strip leading and trailing whitespace
2529         $val =~ s/^\s+//;
2530         $val =~ s/\s+$//;
2531
2532         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2533                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2534 }
2535
2536 # convert config value to simple decimal number
2537 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2538 # to be multiplied by 1024, 1048576, or 1073741824
2539 sub config_to_int {
2540         my $val = shift;
2541
2542         # strip leading and trailing whitespace
2543         $val =~ s/^\s+//;
2544         $val =~ s/\s+$//;
2545
2546         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2547                 $unit = lc($unit);
2548                 # unknown unit is treated as 1
2549                 return $num * ($unit eq 'g' ? 1073741824 :
2550                                $unit eq 'm' ?    1048576 :
2551                                $unit eq 'k' ?       1024 : 1);
2552         }
2553         return $val;
2554 }
2555
2556 # convert config value to array reference, if needed
2557 sub config_to_multi {
2558         my $val = shift;
2559
2560         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2561 }
2562
2563 sub git_get_project_config {
2564         my ($key, $type) = @_;
2565
2566         return unless defined $git_dir;
2567
2568         # key sanity check
2569         return unless ($key);
2570         # only subsection, if exists, is case sensitive,
2571         # and not lowercased by 'git config -z -l'
2572         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2573                 $key = join(".", lc($hi), $mi, lc($lo));
2574         } else {
2575                 $key = lc($key);
2576         }
2577         $key =~ s/^gitweb\.//;
2578         return if ($key =~ m/\W/);
2579
2580         # type sanity check
2581         if (defined $type) {
2582                 $type =~ s/^--//;
2583                 $type = undef
2584                         unless ($type eq 'bool' || $type eq 'int');
2585         }
2586
2587         # get config
2588         if (!defined $config_file ||
2589             $config_file ne "$git_dir/config") {
2590                 %config = git_parse_project_config('gitweb');
2591                 $config_file = "$git_dir/config";
2592         }
2593
2594         # check if config variable (key) exists
2595         return unless exists $config{"gitweb.$key"};
2596
2597         # ensure given type
2598         if (!defined $type) {
2599                 return $config{"gitweb.$key"};
2600         } elsif ($type eq 'bool') {
2601                 # backward compatibility: 'git config --bool' returns true/false
2602                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2603         } elsif ($type eq 'int') {
2604                 return config_to_int($config{"gitweb.$key"});
2605         }
2606         return $config{"gitweb.$key"};
2607 }
2608
2609 # get hash of given path at given ref
2610 sub git_get_hash_by_path {
2611         my $base = shift;
2612         my $path = shift || return undef;
2613         my $type = shift;
2614
2615         $path =~ s,/+$,,;
2616
2617         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2618                 or die_error(500, "Open git-ls-tree failed");
2619         my $line = <$fd>;
2620         close $fd or return undef;
2621
2622         if (!defined $line) {
2623                 # there is no tree or hash given by $path at $base
2624                 return undef;
2625         }
2626
2627         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2628         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2629         if (defined $type && $type ne $2) {
2630                 # type doesn't match
2631                 return undef;
2632         }
2633         return $3;
2634 }
2635
2636 # get path of entry with given hash at given tree-ish (ref)
2637 # used to get 'from' filename for combined diff (merge commit) for renames
2638 sub git_get_path_by_hash {
2639         my $base = shift || return;
2640         my $hash = shift || return;
2641
2642         local $/ = "\0";
2643
2644         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2645                 or return undef;
2646         while (my $line = <$fd>) {
2647                 chomp $line;
2648
2649                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2650                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2651                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2652                         close $fd;
2653                         return $1;
2654                 }
2655         }
2656         close $fd;
2657         return undef;
2658 }
2659
2660 ## ......................................................................
2661 ## git utility functions, directly accessing git repository
2662
2663 # get the value of config variable either from file named as the variable
2664 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2665 # configuration variable in the repository config file.
2666 sub git_get_file_or_project_config {
2667         my ($path, $name) = @_;
2668
2669         $git_dir = "$projectroot/$path";
2670         open my $fd, '<', "$git_dir/$name"
2671                 or return git_get_project_config($name);
2672         my $conf = <$fd>;
2673         close $fd;
2674         if (defined $conf) {
2675                 chomp $conf;
2676         }
2677         return $conf;
2678 }
2679
2680 sub git_get_project_description {
2681         my $path = shift;
2682         return git_get_file_or_project_config($path, 'description');
2683 }
2684
2685 sub git_get_project_category {
2686         my $path = shift;
2687         return git_get_file_or_project_config($path, 'category');
2688 }
2689
2690
2691 # supported formats:
2692 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2693 #   - if its contents is a number, use it as tag weight,
2694 #   - otherwise add a tag with weight 1
2695 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2696 #   the same value multiple times increases tag weight
2697 # * `gitweb.ctag' multi-valued repo config variable
2698 sub git_get_project_ctags {
2699         my $project = shift;
2700         my $ctags = {};
2701
2702         $git_dir = "$projectroot/$project";
2703         if (opendir my $dh, "$git_dir/ctags") {
2704                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2705                 foreach my $tagfile (@files) {
2706                         open my $ct, '<', $tagfile
2707                                 or next;
2708                         my $val = <$ct>;
2709                         chomp $val if $val;
2710                         close $ct;
2711
2712                         (my $ctag = $tagfile) =~ s#.*/##;
2713                         if ($val =~ /^\d+$/) {
2714                                 $ctags->{$ctag} = $val;
2715                         } else {
2716                                 $ctags->{$ctag} = 1;
2717                         }
2718                 }
2719                 closedir $dh;
2720
2721         } elsif (open my $fh, '<', "$git_dir/ctags") {
2722                 while (my $line = <$fh>) {
2723                         chomp $line;
2724                         $ctags->{$line}++ if $line;
2725                 }
2726                 close $fh;
2727
2728         } else {
2729                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2730                 foreach my $tag (@$taglist) {
2731                         $ctags->{$tag}++;
2732                 }
2733         }
2734
2735         return $ctags;
2736 }
2737
2738 # return hash, where keys are content tags ('ctags'),
2739 # and values are sum of weights of given tag in every project
2740 sub git_gather_all_ctags {
2741         my $projects = shift;
2742         my $ctags = {};
2743
2744         foreach my $p (@$projects) {
2745                 foreach my $ct (keys %{$p->{'ctags'}}) {
2746                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2747                 }
2748         }
2749
2750         return $ctags;
2751 }
2752
2753 sub git_populate_project_tagcloud {
2754         my $ctags = shift;
2755
2756         # First, merge different-cased tags; tags vote on casing
2757         my %ctags_lc;
2758         foreach (keys %$ctags) {
2759                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2760                 if (not $ctags_lc{lc $_}->{topcount}
2761                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2762                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2763                         $ctags_lc{lc $_}->{topname} = $_;
2764                 }
2765         }
2766
2767         my $cloud;
2768         my $matched = $cgi->param('by_tag');
2769         if (eval { require HTML::TagCloud; 1; }) {
2770                 $cloud = HTML::TagCloud->new;
2771                 foreach my $ctag (sort keys %ctags_lc) {
2772                         # Pad the title with spaces so that the cloud looks
2773                         # less crammed.
2774                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2775                         $title =~ s/ /&nbsp;/g;
2776                         $title =~ s/^/&nbsp;/g;
2777                         $title =~ s/$/&nbsp;/g;
2778                         if (defined $matched && $matched eq $ctag) {
2779                                 $title = qq(<span class="match">$title</span>);
2780                         }
2781                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2782                                     $ctags_lc{$ctag}->{count});
2783                 }
2784         } else {
2785                 $cloud = {};
2786                 foreach my $ctag (keys %ctags_lc) {
2787                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2792                         $cloud->{$ctag}{ctag} =
2793                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2794                 }
2795         }
2796         return $cloud;
2797 }
2798
2799 sub git_show_project_tagcloud {
2800         my ($cloud, $count) = @_;
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2805                 return
2806                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2807                         join (', ', map {
2808                                 $cloud->{$_}->{'ctag'}
2809                         } splice(@tags, 0, $count)) .
2810                         '</div>';
2811         }
2812 }
2813
2814 sub git_get_project_url_list {
2815         my $path = shift;
2816
2817         $git_dir = "$projectroot/$path";
2818         open my $fd, '<', "$git_dir/cloneurl"
2819                 or return wantarray ?
2820                 @{ config_to_multi(git_get_project_config('url')) } :
2821                    config_to_multi(git_get_project_config('url'));
2822         my @git_project_url_list = map { chomp; $_ } <$fd>;
2823         close $fd;
2824
2825         return wantarray ? @git_project_url_list : \@git_project_url_list;
2826 }
2827
2828 sub git_get_projects_list {
2829         my $filter = shift || '';
2830         my @list;
2831
2832         $filter =~ s/\.git$//;
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list;
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$projects_list");
2840                 my $pfxdepth = ($projects_list =~ tr!/!!);
2841                 # when filtering, search only given subdirectory
2842                 if ($filter) {
2843                         $dir .= "/$filter";
2844                         $dir =~ s!/+$!!;
2845                 }
2846
2847                 File::Find::find({
2848                         follow_fast => 1, # follow symbolic links
2849                         follow_skip => 2, # ignore duplicates
2850                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2851                         wanted => sub {
2852                                 # global variables
2853                                 our $project_maxdepth;
2854                                 our $projectroot;
2855                                 # skip project-list toplevel, if we get it.
2856                                 return if (m!^[/.]$!);
2857                                 # only directories can be git repositories
2858                                 return unless (-d $_);
2859                                 # don't traverse too deep (Find is super slow on os x)
2860                                 # $project_maxdepth excludes depth of $projectroot
2861                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2862                                         $File::Find::prune = 1;
2863                                         return;
2864                                 }
2865
2866                                 my $path = substr($File::Find::name, $pfxlen + 1);
2867                                 # we check related file in $projectroot
2868                                 if (check_export_ok("$projectroot/$path")) {
2869                                         push @list, { path => $path };
2870                                         $File::Find::prune = 1;
2871                                 }
2872                         },
2873                 }, "$dir");
2874
2875         } elsif (-f $projects_list) {
2876                 # read from file(url-encoded):
2877                 # 'git%2Fgit.git Linus+Torvalds'
2878                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2879                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2880                 open my $fd, '<', $projects_list or return;
2881         PROJECT:
2882                 while (my $line = <$fd>) {
2883                         chomp $line;
2884                         my ($path, $owner) = split ' ', $line;
2885                         $path = unescape($path);
2886                         $owner = unescape($owner);
2887                         if (!defined $path) {
2888                                 next;
2889                         }
2890                         # if $filter is rpovided, check if $path begins with $filter
2891                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2892                                 next;
2893                         }
2894                         if (check_export_ok("$projectroot/$path")) {
2895                                 my $pr = {
2896                                         path => $path,
2897                                         owner => to_utf8($owner),
2898                                 };
2899                                 push @list, $pr;
2900                         }
2901                 }
2902                 close $fd;
2903         }
2904         return @list;
2905 }
2906
2907 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2908 # as side effects it sets 'forks' field to list of forks for forked projects
2909 sub filter_forks_from_projects_list {
2910         my $projects = shift;
2911
2912         my %trie; # prefix tree of directories (path components)
2913         # generate trie out of those directories that might contain forks
2914         foreach my $pr (@$projects) {
2915                 my $path = $pr->{'path'};
2916                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2917                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2918                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2919                 next unless (-d "$projectroot/$path"); # containing directory exists
2920                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2921
2922                 # add to trie
2923                 my @dirs = split('/', $path);
2924                 # walk the trie, until either runs out of components or out of trie
2925                 my $ref = \%trie;
2926                 while (scalar @dirs &&
2927                        exists($ref->{$dirs[0]})) {
2928                         $ref = $ref->{shift @dirs};
2929                 }
2930                 # create rest of trie structure from rest of components
2931                 foreach my $dir (@dirs) {
2932                         $ref = $ref->{$dir} = {};
2933                 }
2934                 # create end marker, store $pr as a data
2935                 $ref->{''} = $pr if (!exists $ref->{''});
2936         }
2937
2938         # filter out forks, by finding shortest prefix match for paths
2939         my @filtered;
2940  PROJECT:
2941         foreach my $pr (@$projects) {
2942                 # trie lookup
2943                 my $ref = \%trie;
2944         DIR:
2945                 foreach my $dir (split('/', $pr->{'path'})) {
2946                         if (exists $ref->{''}) {
2947                                 # found [shortest] prefix, is a fork - skip it
2948                                 push @{$ref->{''}{'forks'}}, $pr;
2949                                 next PROJECT;
2950                         }
2951                         if (!exists $ref->{$dir}) {
2952                                 # not in trie, cannot have prefix, not a fork
2953                                 push @filtered, $pr;
2954                                 next PROJECT;
2955                         }
2956                         # If the dir is there, we just walk one step down the trie.
2957                         $ref = $ref->{$dir};
2958                 }
2959                 # we ran out of trie
2960                 # (shouldn't happen: it's either no match, or end marker)
2961                 push @filtered, $pr;
2962         }
2963
2964         return @filtered;
2965 }
2966
2967 # note: fill_project_list_info must be run first,
2968 # for 'descr_long' and 'ctags' to be filled
2969 sub search_projects_list {
2970         my ($projlist, %opts) = @_;
2971         my $tagfilter  = $opts{'tagfilter'};
2972         my $searchtext = $opts{'searchtext'};
2973
2974         return @$projlist
2975                 unless ($tagfilter || $searchtext);
2976
2977         my @projects;
2978  PROJECT:
2979         foreach my $pr (@$projlist) {
2980
2981                 if ($tagfilter) {
2982                         next unless ref($pr->{'ctags'}) eq 'HASH';
2983                         next unless
2984                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2985                 }
2986
2987                 if ($searchtext) {
2988                         next unless
2989                                 $pr->{'path'} =~ /$searchtext/ ||
2990                                 $pr->{'descr_long'} =~ /$searchtext/;
2991                 }
2992
2993                 push @projects, $pr;
2994         }
2995
2996         return @projects;
2997 }
2998
2999 our $gitweb_project_owner = undef;
3000 sub git_get_project_list_from_file {
3001
3002         return if (defined $gitweb_project_owner);
3003
3004         $gitweb_project_owner = {};
3005         # read from file (url-encoded):
3006         # 'git%2Fgit.git Linus+Torvalds'
3007         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009         if (-f $projects_list) {
3010                 open(my $fd, '<', $projects_list);
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($pr, $ow) = split ' ', $line;
3014                         $pr = unescape($pr);
3015                         $ow = unescape($ow);
3016                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3017                 }
3018                 close $fd;
3019         }
3020 }
3021
3022 sub git_get_project_owner {
3023         my $project = shift;
3024         my $owner;
3025
3026         return undef unless $project;
3027         $git_dir = "$projectroot/$project";
3028
3029         if (!defined $gitweb_project_owner) {
3030                 git_get_project_list_from_file();
3031         }
3032
3033         if (exists $gitweb_project_owner->{$project}) {
3034                 $owner = $gitweb_project_owner->{$project};
3035         }
3036         if (!defined $owner){
3037                 $owner = git_get_project_config('owner');
3038         }
3039         if (!defined $owner) {
3040                 $owner = get_file_owner("$git_dir");
3041         }
3042
3043         return $owner;
3044 }
3045
3046 sub git_get_last_activity {
3047         my ($path) = @_;
3048         my $fd;
3049
3050         $git_dir = "$projectroot/$path";
3051         open($fd, "-|", git_cmd(), 'for-each-ref',
3052              '--format=%(committer)',
3053              '--sort=-committerdate',
3054              '--count=1',
3055              'refs/heads') or return;
3056         my $most_recent = <$fd>;
3057         close $fd or return;
3058         if (defined $most_recent &&
3059             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3060                 my $timestamp = $1;
3061                 my $age = time - $timestamp;
3062                 return ($age, age_string($age));
3063         }
3064         return (undef, undef);
3065 }
3066
3067 # Implementation note: when a single remote is wanted, we cannot use 'git
3068 # remote show -n' because that command always work (assuming it's a remote URL
3069 # if it's not defined), and we cannot use 'git remote show' because that would
3070 # try to make a network roundtrip. So the only way to find if that particular
3071 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3072 # and when we find what we want.
3073 sub git_get_remotes_list {
3074         my $wanted = shift;
3075         my %remotes = ();
3076
3077         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3078         return unless $fd;
3079         while (my $remote = <$fd>) {
3080                 chomp $remote;
3081                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3082                 next if $wanted and not $remote eq $wanted;
3083                 my ($url, $key) = ($1, $2);
3084
3085                 $remotes{$remote} ||= { 'heads' => () };
3086                 $remotes{$remote}{$key} = $url;
3087         }
3088         close $fd or return;
3089         return wantarray ? %remotes : \%remotes;
3090 }
3091
3092 # Takes a hash of remotes as first parameter and fills it by adding the
3093 # available remote heads for each of the indicated remotes.
3094 sub fill_remote_heads {
3095         my $remotes = shift;
3096         my @heads = map { "remotes/$_" } keys %$remotes;
3097         my @remoteheads = git_get_heads_list(undef, @heads);
3098         foreach my $remote (keys %$remotes) {
3099                 $remotes->{$remote}{'heads'} = [ grep {
3100                         $_->{'name'} =~ s!^$remote/!!
3101                         } @remoteheads ];
3102         }
3103 }
3104
3105 sub git_get_references {
3106         my $type = shift || "";
3107         my %refs;
3108         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3109         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3110         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3111                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3112                 or return;
3113
3114         while (my $line = <$fd>) {
3115                 chomp $line;
3116                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3117                         if (defined $refs{$1}) {
3118                                 push @{$refs{$1}}, $2;
3119                         } else {
3120                                 $refs{$1} = [ $2 ];
3121                         }
3122                 }
3123         }
3124         close $fd or return;
3125         return \%refs;
3126 }
3127
3128 sub git_get_rev_name_tags {
3129         my $hash = shift || return undef;
3130
3131         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3132                 or return;
3133         my $name_rev = <$fd>;
3134         close $fd;
3135
3136         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3137                 return $1;
3138         } else {
3139                 # catches also '$hash undefined' output
3140                 return undef;
3141         }
3142 }
3143
3144 ## ----------------------------------------------------------------------
3145 ## parse to hash functions
3146
3147 sub parse_date {
3148         my $epoch = shift;
3149         my $tz = shift || "-0000";
3150
3151         my %date;
3152         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3153         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3154         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3155         $date{'hour'} = $hour;
3156         $date{'minute'} = $min;
3157         $date{'mday'} = $mday;
3158         $date{'day'} = $days[$wday];
3159         $date{'month'} = $months[$mon];
3160         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3161                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3162         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3163                              $mday, $months[$mon], $hour ,$min;
3164         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3165                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3166
3167         my ($tz_sign, $tz_hour, $tz_min) =
3168                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3169         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3170         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3171         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3172         $date{'hour_local'} = $hour;
3173         $date{'minute_local'} = $min;
3174         $date{'tz_local'} = $tz;
3175         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3176                                   1900+$year, $mon+1, $mday,
3177                                   $hour, $min, $sec, $tz);
3178         return %date;
3179 }
3180
3181 sub parse_tag {
3182         my $tag_id = shift;
3183         my %tag;
3184         my @comment;
3185
3186         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3187         $tag{'id'} = $tag_id;
3188         while (my $line = <$fd>) {
3189                 chomp $line;
3190                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3191                         $tag{'object'} = $1;
3192                 } elsif ($line =~ m/^type (.+)$/) {
3193                         $tag{'type'} = $1;
3194                 } elsif ($line =~ m/^tag (.+)$/) {
3195                         $tag{'name'} = $1;
3196                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3197                         $tag{'author'} = $1;
3198                         $tag{'author_epoch'} = $2;
3199                         $tag{'author_tz'} = $3;
3200                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3201                                 $tag{'author_name'}  = $1;
3202                                 $tag{'author_email'} = $2;
3203                         } else {
3204                                 $tag{'author_name'} = $tag{'author'};
3205                         }
3206                 } elsif ($line =~ m/--BEGIN/) {
3207                         push @comment, $line;
3208                         last;
3209                 } elsif ($line eq "") {
3210                         last;
3211                 }
3212         }
3213         push @comment, <$fd>;
3214         $tag{'comment'} = \@comment;
3215         close $fd or return;
3216         if (!defined $tag{'name'}) {
3217                 return
3218         };
3219         return %tag
3220 }
3221
3222 sub parse_commit_text {
3223         my ($commit_text, $withparents) = @_;
3224         my @commit_lines = split '\n', $commit_text;
3225         my %co;
3226
3227         pop @commit_lines; # Remove '\0'
3228
3229         if (! @commit_lines) {
3230                 return;
3231         }
3232
3233         my $header = shift @commit_lines;
3234         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3235                 return;
3236         }
3237         ($co{'id'}, my @parents) = split ' ', $header;
3238         while (my $line = shift @commit_lines) {
3239                 last if $line eq "\n";
3240                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3241                         $co{'tree'} = $1;
3242                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3243                         push @parents, $1;
3244                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3245                         $co{'author'} = to_utf8($1);
3246                         $co{'author_epoch'} = $2;
3247                         $co{'author_tz'} = $3;
3248                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3249                                 $co{'author_name'}  = $1;
3250                                 $co{'author_email'} = $2;
3251                         } else {
3252                                 $co{'author_name'} = $co{'author'};
3253                         }
3254                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3255                         $co{'committer'} = to_utf8($1);
3256                         $co{'committer_epoch'} = $2;
3257                         $co{'committer_tz'} = $3;
3258                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3259                                 $co{'committer_name'}  = $1;
3260                                 $co{'committer_email'} = $2;
3261                         } else {
3262                                 $co{'committer_name'} = $co{'committer'};
3263                         }
3264                 }
3265         }
3266         if (!defined $co{'tree'}) {
3267                 return;
3268         };
3269         $co{'parents'} = \@parents;
3270         $co{'parent'} = $parents[0];
3271
3272         foreach my $title (@commit_lines) {
3273                 $title =~ s/^    //;
3274                 if ($title ne "") {
3275                         $co{'title'} = chop_str($title, 80, 5);
3276                         # remove leading stuff of merges to make the interesting part visible
3277                         if (length($title) > 50) {
3278                                 $title =~ s/^Automatic //;
3279                                 $title =~ s/^merge (of|with) /Merge ... /i;
3280                                 if (length($title) > 50) {
3281                                         $title =~ s/(http|rsync):\/\///;
3282                                 }
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(master|www|rsync)\.//;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/kernel.org:?//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/\/pub\/scm//;
3291                                 }
3292                         }
3293                         $co{'title_short'} = chop_str($title, 50, 5);
3294                         last;
3295                 }
3296         }
3297         if (! defined $co{'title'} || $co{'title'} eq "") {
3298                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3299         }
3300         # remove added spaces
3301         foreach my $line (@commit_lines) {
3302                 $line =~ s/^    //;
3303         }
3304         $co{'comment'} = \@commit_lines;
3305
3306         my $age = time - $co{'committer_epoch'};
3307         $co{'age'} = $age;
3308         $co{'age_string'} = age_string($age);
3309         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3310         if ($age > 60*60*24*7*2) {
3311                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3312                 $co{'age_string_age'} = $co{'age_string'};
3313         } else {
3314                 $co{'age_string_date'} = $co{'age_string'};
3315                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3316         }
3317         return %co;
3318 }
3319
3320 sub parse_commit {
3321         my ($commit_id) = @_;
3322         my %co;
3323
3324         local $/ = "\0";
3325
3326         open my $fd, "-|", git_cmd(), "rev-list",
3327                 "--parents",
3328                 "--header",
3329                 "--max-count=1",
3330                 $commit_id,
3331                 "--",
3332                 or die_error(500, "Open git-rev-list failed");
3333         %co = parse_commit_text(<$fd>, 1);
3334         close $fd;
3335
3336         return %co;
3337 }
3338
3339 sub parse_commits {
3340         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3341         my @cos;
3342
3343         $maxcount ||= 1;
3344         $skip ||= 0;
3345
3346         local $/ = "\0";
3347
3348         open my $fd, "-|", git_cmd(), "rev-list",
3349                 "--header",
3350                 @args,
3351                 ("--max-count=" . $maxcount),
3352                 ("--skip=" . $skip),
3353                 @extra_options,
3354                 $commit_id,
3355                 "--",
3356                 ($filename ? ($filename) : ())
3357                 or die_error(500, "Open git-rev-list failed");
3358         while (my $line = <$fd>) {
3359                 my %co = parse_commit_text($line);
3360                 push @cos, \%co;
3361         }
3362         close $fd;
3363
3364         return wantarray ? @cos : \@cos;
3365 }
3366
3367 # parse line of git-diff-tree "raw" output
3368 sub parse_difftree_raw_line {
3369         my $line = shift;
3370         my %res;
3371
3372         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3373         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3374         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3375                 $res{'from_mode'} = $1;
3376                 $res{'to_mode'} = $2;
3377                 $res{'from_id'} = $3;
3378                 $res{'to_id'} = $4;
3379                 $res{'status'} = $5;
3380                 $res{'similarity'} = $6;
3381                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3382                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3383                 } else {
3384                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3385                 }
3386         }
3387         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3388         # combined diff (for merge commit)
3389         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3390                 $res{'nparents'}  = length($1);
3391                 $res{'from_mode'} = [ split(' ', $2) ];
3392                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3393                 $res{'from_id'} = [ split(' ', $3) ];
3394                 $res{'to_id'} = pop @{$res{'from_id'}};
3395                 $res{'status'} = [ split('', $4) ];
3396                 $res{'to_file'} = unquote($5);
3397         }
3398         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3399         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3400                 $res{'commit'} = $1;
3401         }
3402
3403         return wantarray ? %res : \%res;
3404 }
3405
3406 # wrapper: return parsed line of git-diff-tree "raw" output
3407 # (the argument might be raw line, or parsed info)
3408 sub parsed_difftree_line {
3409         my $line_or_ref = shift;
3410
3411         if (ref($line_or_ref) eq "HASH") {
3412                 # pre-parsed (or generated by hand)
3413                 return $line_or_ref;
3414         } else {
3415                 return parse_difftree_raw_line($line_or_ref);
3416         }
3417 }
3418
3419 # parse line of git-ls-tree output
3420 sub parse_ls_tree_line {
3421         my $line = shift;
3422         my %opts = @_;
3423         my %res;
3424
3425         if ($opts{'-l'}) {
3426                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3427                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3428
3429                 $res{'mode'} = $1;
3430                 $res{'type'} = $2;
3431                 $res{'hash'} = $3;
3432                 $res{'size'} = $4;
3433                 if ($opts{'-z'}) {
3434                         $res{'name'} = $5;
3435                 } else {
3436                         $res{'name'} = unquote($5);
3437                 }
3438         } else {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 if ($opts{'-z'}) {
3446                         $res{'name'} = $4;
3447                 } else {
3448                         $res{'name'} = unquote($4);
3449                 }
3450         }
3451
3452         return wantarray ? %res : \%res;
3453 }
3454
3455 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3456 sub parse_from_to_diffinfo {
3457         my ($diffinfo, $from, $to, @parents) = @_;
3458
3459         if ($diffinfo->{'nparents'}) {
3460                 # combined diff
3461                 $from->{'file'} = [];
3462                 $from->{'href'} = [];
3463                 fill_from_file_info($diffinfo, @parents)
3464                         unless exists $diffinfo->{'from_file'};
3465                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3466                         $from->{'file'}[$i] =
3467                                 defined $diffinfo->{'from_file'}[$i] ?
3468                                         $diffinfo->{'from_file'}[$i] :
3469                                         $diffinfo->{'to_file'};
3470                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3471                                 $from->{'href'}[$i] = href(action=>"blob",
3472                                                            hash_base=>$parents[$i],
3473                                                            hash=>$diffinfo->{'from_id'}[$i],
3474                                                            file_name=>$from->{'file'}[$i]);
3475                         } else {
3476                                 $from->{'href'}[$i] = undef;
3477                         }
3478                 }
3479         } else {
3480                 # ordinary (not combined) diff
3481                 $from->{'file'} = $diffinfo->{'from_file'};
3482                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3483                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3484                                                hash=>$diffinfo->{'from_id'},
3485                                                file_name=>$from->{'file'});
3486                 } else {
3487                         delete $from->{'href'};
3488                 }
3489         }
3490
3491         $to->{'file'} = $diffinfo->{'to_file'};
3492         if (!is_deleted($diffinfo)) { # file exists in result
3493                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3494                                      hash=>$diffinfo->{'to_id'},
3495                                      file_name=>$to->{'file'});
3496         } else {
3497                 delete $to->{'href'};
3498         }
3499 }
3500
3501 ## ......................................................................
3502 ## parse to array of hashes functions
3503
3504 sub git_get_heads_list {
3505         my ($limit, @classes) = @_;
3506         @classes = ('heads') unless @classes;
3507         my @patterns = map { "refs/$_" } @classes;
3508         my @headslist;
3509
3510         open my $fd, '-|', git_cmd(), 'for-each-ref',
3511                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3512                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3513                 @patterns
3514                 or return;
3515         while (my $line = <$fd>) {
3516                 my %ref_item;
3517
3518                 chomp $line;
3519                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3520                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3521                 my ($committer, $epoch, $tz) =
3522                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3523                 $ref_item{'fullname'}  = $name;
3524                 $name =~ s!^refs/(?:head|remote)s/!!;
3525
3526                 $ref_item{'name'}  = $name;
3527                 $ref_item{'id'}    = $hash;
3528                 $ref_item{'title'} = $title || '(no commit message)';
3529                 $ref_item{'epoch'} = $epoch;
3530                 if ($epoch) {
3531                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3532                 } else {
3533                         $ref_item{'age'} = "unknown";
3534                 }
3535
3536                 push @headslist, \%ref_item;
3537         }
3538         close $fd;
3539
3540         return wantarray ? @headslist : \@headslist;
3541 }
3542
3543 sub git_get_tags_list {
3544         my $limit = shift;
3545         my @tagslist;
3546
3547         open my $fd, '-|', git_cmd(), 'for-each-ref',
3548                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3549                 '--format=%(objectname) %(objecttype) %(refname) '.
3550                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3551                 'refs/tags'
3552                 or return;
3553         while (my $line = <$fd>) {
3554                 my %ref_item;
3555
3556                 chomp $line;
3557                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3558                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3559                 my ($creator, $epoch, $tz) =
3560                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3561                 $ref_item{'fullname'} = $name;
3562                 $name =~ s!^refs/tags/!!;
3563
3564                 $ref_item{'type'} = $type;
3565                 $ref_item{'id'} = $id;
3566                 $ref_item{'name'} = $name;
3567                 if ($type eq "tag") {
3568                         $ref_item{'subject'} = $title;
3569                         $ref_item{'reftype'} = $reftype;
3570                         $ref_item{'refid'}   = $refid;
3571                 } else {
3572                         $ref_item{'reftype'} = $type;
3573                         $ref_item{'refid'}   = $id;
3574                 }
3575
3576                 if ($type eq "tag" || $type eq "commit") {
3577                         $ref_item{'epoch'} = $epoch;
3578                         if ($epoch) {
3579                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3580                         } else {
3581                                 $ref_item{'age'} = "unknown";
3582                         }
3583                 }
3584
3585                 push @tagslist, \%ref_item;
3586         }
3587         close $fd;
3588
3589         return wantarray ? @tagslist : \@tagslist;
3590 }
3591
3592 ## ----------------------------------------------------------------------
3593 ## filesystem-related functions
3594
3595 sub get_file_owner {
3596         my $path = shift;
3597
3598         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3599         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3600         if (!defined $gcos) {
3601                 return undef;
3602         }
3603         my $owner = $gcos;
3604         $owner =~ s/[,;].*$//;
3605         return to_utf8($owner);
3606 }
3607
3608 # assume that file exists
3609 sub insert_file {
3610         my $filename = shift;
3611
3612         open my $fd, '<', $filename;
3613         print map { to_utf8($_) } <$fd>;
3614         close $fd;
3615 }
3616
3617 ## ......................................................................
3618 ## mimetype related functions
3619
3620 sub mimetype_guess_file {
3621         my $filename = shift;
3622         my $mimemap = shift;
3623         -r $mimemap or return undef;
3624
3625         my %mimemap;
3626         open(my $mh, '<', $mimemap) or return undef;
3627         while (<$mh>) {
3628                 next if m/^#/; # skip comments
3629                 my ($mimetype, @exts) = split(/\s+/);
3630                 foreach my $ext (@exts) {
3631                         $mimemap{$ext} = $mimetype;
3632                 }
3633         }
3634         close($mh);
3635
3636         $filename =~ /\.([^.]*)$/;
3637         return $mimemap{$1};
3638 }
3639
3640 sub mimetype_guess {
3641         my $filename = shift;
3642         my $mime;
3643         $filename =~ /\./ or return undef;
3644
3645         if ($mimetypes_file) {
3646                 my $file = $mimetypes_file;
3647                 if ($file !~ m!^/!) { # if it is relative path
3648                         # it is relative to project
3649                         $file = "$projectroot/$project/$file";
3650                 }
3651                 $mime = mimetype_guess_file($filename, $file);
3652         }
3653         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3654         return $mime;
3655 }
3656
3657 sub blob_mimetype {
3658         my $fd = shift;
3659         my $filename = shift;
3660
3661         if ($filename) {
3662                 my $mime = mimetype_guess($filename);
3663                 $mime and return $mime;
3664         }
3665
3666         # just in case
3667         return $default_blob_plain_mimetype unless $fd;
3668
3669         if (-T $fd) {
3670                 return 'text/plain';
3671         } elsif (! $filename) {
3672                 return 'application/octet-stream';
3673         } elsif ($filename =~ m/\.png$/i) {
3674                 return 'image/png';
3675         } elsif ($filename =~ m/\.gif$/i) {
3676                 return 'image/gif';
3677         } elsif ($filename =~ m/\.jpe?g$/i) {
3678                 return 'image/jpeg';
3679         } else {
3680                 return 'application/octet-stream';
3681         }
3682 }
3683
3684 sub blob_contenttype {
3685         my ($fd, $file_name, $type) = @_;
3686
3687         $type ||= blob_mimetype($fd, $file_name);
3688         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3689                 $type .= "; charset=$default_text_plain_charset";
3690         }
3691
3692         return $type;
3693 }
3694
3695 # guess file syntax for syntax highlighting; return undef if no highlighting
3696 # the name of syntax can (in the future) depend on syntax highlighter used
3697 sub guess_file_syntax {
3698         my ($highlight, $mimetype, $file_name) = @_;
3699         return undef unless ($highlight && defined $file_name);
3700         my $basename = basename($file_name, '.in');
3701         return $highlight_basename{$basename}
3702                 if exists $highlight_basename{$basename};
3703
3704         $basename =~ /\.([^.]*)$/;
3705         my $ext = $1 or return undef;
3706         return $highlight_ext{$ext}
3707                 if exists $highlight_ext{$ext};
3708
3709         return undef;
3710 }
3711
3712 # run highlighter and return FD of its output,
3713 # or return original FD if no highlighting
3714 sub run_highlighter {
3715         my ($fd, $highlight, $syntax) = @_;
3716         return $fd unless ($highlight && defined $syntax);
3717
3718         close $fd;
3719         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3720                   quote_command($highlight_bin).
3721                   " --replace-tabs=8 --fragment --syntax $syntax |"
3722                 or die_error(500, "Couldn't open file or run syntax highlighter");
3723         return $fd;
3724 }
3725
3726 ## ======================================================================
3727 ## functions printing HTML: header, footer, error page
3728
3729 sub get_page_title {
3730         my $title = to_utf8($site_name);
3731
3732         return $title unless (defined $project);
3733         $title .= " - " . to_utf8($project);
3734
3735         return $title unless (defined $action);
3736         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3737
3738         return $title unless (defined $file_name);
3739         $title .= " - " . esc_path($file_name);
3740         if ($action eq "tree" && $file_name !~ m|/$|) {
3741                 $title .= "/";
3742         }
3743
3744         return $title;
3745 }
3746
3747 sub get_content_type_html {
3748         # require explicit support from the UA if we are to send the page as
3749         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3750         # we have to do this because MSIE sometimes globs '*/*', pretending to
3751         # support xhtml+xml but choking when it gets what it asked for.
3752         if (defined $cgi->http('HTTP_ACCEPT') &&
3753             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3754             $cgi->Accept('application/xhtml+xml') != 0) {
3755                 return 'application/xhtml+xml';
3756         } else {
3757                 return 'text/html';
3758         }
3759 }
3760
3761 sub print_feed_meta {
3762         if (defined $project) {
3763                 my %href_params = get_feed_info();
3764                 if (!exists $href_params{'-title'}) {
3765                         $href_params{'-title'} = 'log';
3766                 }
3767
3768                 foreach my $format (qw(RSS Atom)) {
3769                         my $type = lc($format);
3770                         my %link_attr = (
3771                                 '-rel' => 'alternate',
3772                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3773                                 '-type' => "application/$type+xml"
3774                         );
3775
3776                         $href_params{'action'} = $type;
3777                         $link_attr{'-href'} = href(%href_params);
3778                         print "<link ".
3779                               "rel=\"$link_attr{'-rel'}\" ".
3780                               "title=\"$link_attr{'-title'}\" ".
3781                               "href=\"$link_attr{'-href'}\" ".
3782                               "type=\"$link_attr{'-type'}\" ".
3783                               "/>\n";
3784
3785                         $href_params{'extra_options'} = '--no-merges';
3786                         $link_attr{'-href'} = href(%href_params);
3787                         $link_attr{'-title'} .= ' (no merges)';
3788                         print "<link ".
3789                               "rel=\"$link_attr{'-rel'}\" ".
3790                               "title=\"$link_attr{'-title'}\" ".
3791                               "href=\"$link_attr{'-href'}\" ".
3792                               "type=\"$link_attr{'-type'}\" ".
3793                               "/>\n";
3794                 }
3795
3796         } else {
3797                 printf('<link rel="alternate" title="%s projects list" '.
3798                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3799                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3800                 printf('<link rel="alternate" title="%s projects feeds" '.
3801                        'href="%s" type="text/x-opml" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3803         }
3804 }
3805
3806 sub print_header_links {
3807         my $status = shift;
3808
3809         # print out each stylesheet that exist, providing backwards capability
3810         # for those people who defined $stylesheet in a config file
3811         if (defined $stylesheet) {
3812                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3813         } else {
3814                 foreach my $stylesheet (@stylesheets) {
3815                         next unless $stylesheet;
3816                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3817                 }
3818         }
3819         print_feed_meta()
3820                 if ($status eq '200 OK');
3821         if (defined $favicon) {
3822                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3823         }
3824 }
3825
3826 sub print_nav_breadcrumbs {
3827         my %opts = @_;
3828
3829         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3830         if (defined $project) {
3831                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3832                 if (defined $action) {
3833                         my $action_print = $action ;
3834                         if (defined $opts{-action_extra}) {
3835                                 $action_print = $cgi->a({-href => href(action=>$action)},
3836                                         $action);
3837                         }
3838                         print " / $action_print";
3839                 }
3840                 if (defined $opts{-action_extra}) {
3841                         print " / $opts{-action_extra}";
3842                 }
3843                 print "\n";
3844         }
3845 }
3846
3847 sub print_search_form {
3848         if (!defined $searchtext) {
3849                 $searchtext = "";
3850         }
3851         my $search_hash;
3852         if (defined $hash_base) {
3853                 $search_hash = $hash_base;
3854         } elsif (defined $hash) {
3855                 $search_hash = $hash;
3856         } else {
3857                 $search_hash = "HEAD";
3858         }
3859         my $action = $my_uri;
3860         my $use_pathinfo = gitweb_check_feature('pathinfo');
3861         if ($use_pathinfo) {
3862                 $action .= "/".esc_url($project);
3863         }
3864         print $cgi->startform(-method => "get", -action => $action) .
3865               "<div class=\"search\">\n" .
3866               (!$use_pathinfo &&
3867               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3868               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3869               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3870               $cgi->popup_menu(-name => 'st', -default => 'commit',
3871                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3872               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3873               " search:\n",
3874               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3875               "<span title=\"Extended regular expression\">" .
3876               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3877                              -checked => $search_use_regexp) .
3878               "</span>" .
3879               "</div>" .
3880               $cgi->end_form() . "\n";
3881 }
3882
3883 sub git_header_html {
3884         my $status = shift || "200 OK";
3885         my $expires = shift;
3886         my %opts = @_;
3887
3888         my $title = get_page_title();
3889         my $content_type = get_content_type_html();
3890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3891                            -status=> $status, -expires => $expires)
3892                 unless ($opts{'-no_http_header'});
3893         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3894         print <<EOF;
3895 <?xml version="1.0" encoding="utf-8"?>
3896 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3897 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3898 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3899 <!-- git core binaries version $git_version -->
3900 <head>
3901 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3902 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3903 <meta name="robots" content="index, nofollow"/>
3904 <title>$title</title>
3905 EOF
3906         # the stylesheet, favicon etc urls won't work correctly with path_info
3907         # unless we set the appropriate base URL
3908         if ($ENV{'PATH_INFO'}) {
3909                 print "<base href=\"".esc_url($base_url)."\" />\n";
3910         }
3911         print_header_links($status);
3912
3913         if (defined $site_html_head_string) {
3914                 print to_utf8($site_html_head_string);
3915         }
3916
3917         print "</head>\n" .
3918               "<body>\n";
3919
3920         if (defined $site_header && -f $site_header) {
3921                 insert_file($site_header);
3922         }
3923
3924         print "<div class=\"page_header\">\n";
3925         if (defined $logo) {
3926                 print $cgi->a({-href => esc_url($logo_url),
3927                                -title => $logo_label},
3928                               $cgi->img({-src => esc_url($logo),
3929                                          -width => 72, -height => 27,
3930                                          -alt => "git",
3931                                          -class => "logo"}));
3932         }
3933         print_nav_breadcrumbs(%opts);
3934         print "</div>\n";
3935
3936         my $have_search = gitweb_check_feature('search');
3937         if (defined $project && $have_search) {
3938                 print_search_form();
3939         }
3940 }
3941
3942 sub git_footer_html {
3943         my $feed_class = 'rss_logo';
3944
3945         print "<div class=\"page_footer\">\n";
3946         if (defined $project) {
3947                 my $descr = git_get_project_description($project);
3948                 if (defined $descr) {
3949                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3950                 }
3951
3952                 my %href_params = get_feed_info();
3953                 if (!%href_params) {
3954                         $feed_class .= ' generic';
3955                 }
3956                 $href_params{'-title'} ||= 'log';
3957
3958                 foreach my $format (qw(RSS Atom)) {
3959                         $href_params{'action'} = lc($format);
3960                         print $cgi->a({-href => href(%href_params),
3961                                       -title => "$href_params{'-title'} $format feed",
3962                                       -class => $feed_class}, $format)."\n";
3963                 }
3964
3965         } else {
3966                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3967                               -class => $feed_class}, "OPML") . " ";
3968                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3969                               -class => $feed_class}, "TXT") . "\n";
3970         }
3971         print "</div>\n"; # class="page_footer"
3972
3973         if (defined $t0 && gitweb_check_feature('timed')) {
3974                 print "<div id=\"generating_info\">\n";
3975                 print 'This page took '.
3976                       '<span id="generating_time" class="time_span">'.
3977                       tv_interval($t0, [ gettimeofday() ]).
3978                       ' seconds </span>'.
3979                       ' and '.
3980                       '<span id="generating_cmd">'.
3981                       $number_of_git_cmds.
3982                       '</span> git commands '.
3983                       " to generate.\n";
3984                 print "</div>\n"; # class="page_footer"
3985         }
3986
3987         if (defined $site_footer && -f $site_footer) {
3988                 insert_file($site_footer);
3989         }
3990
3991         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3992         if (defined $action &&
3993             $action eq 'blame_incremental') {
3994                 print qq!<script type="text/javascript">\n!.
3995                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3996                       qq!           "!. href() .qq!");\n!.
3997                       qq!</script>\n!;
3998         } else {
3999                 my ($jstimezone, $tz_cookie, $datetime_class) =
4000                         gitweb_get_feature('javascript-timezone');
4001
4002                 print qq!<script type="text/javascript">\n!.
4003                       qq!window.onload = function () {\n!;
4004                 if (gitweb_check_feature('javascript-actions')) {
4005                         print qq!       fixLinks();\n!;
4006                 }
4007                 if ($jstimezone && $tz_cookie && $datetime_class) {
4008                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4009                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4010                 }
4011                 print qq!};\n!.
4012                       qq!</script>\n!;
4013         }
4014
4015         print "</body>\n" .
4016               "</html>";
4017 }
4018
4019 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4020 # Example: die_error(404, 'Hash not found')
4021 # By convention, use the following status codes (as defined in RFC 2616):
4022 # 400: Invalid or missing CGI parameters, or
4023 #      requested object exists but has wrong type.
4024 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4025 #      this server or project.
4026 # 404: Requested object/revision/project doesn't exist.
4027 # 500: The server isn't configured properly, or
4028 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4029 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4030 # 503: The server is currently unavailable (because it is overloaded,
4031 #      or down for maintenance).  Generally, this is a temporary state.
4032 sub die_error {
4033         my $status = shift || 500;
4034         my $error = esc_html(shift) || "Internal Server Error";
4035         my $extra = shift;
4036         my %opts = @_;
4037
4038         my %http_responses = (
4039                 400 => '400 Bad Request',
4040                 403 => '403 Forbidden',
4041                 404 => '404 Not Found',
4042                 500 => '500 Internal Server Error',
4043                 503 => '503 Service Unavailable',
4044         );
4045         git_header_html($http_responses{$status}, undef, %opts);
4046         print <<EOF;
4047 <div class="page_body">
4048 <br /><br />
4049 $status - $error
4050 <br />
4051 EOF
4052         if (defined $extra) {
4053                 print "<hr />\n" .
4054                       "$extra\n";
4055         }
4056         print "</div>\n";
4057
4058         git_footer_html();
4059         goto DONE_GITWEB
4060                 unless ($opts{'-error_handler'});
4061 }
4062
4063 ## ----------------------------------------------------------------------
4064 ## functions printing or outputting HTML: navigation
4065
4066 sub git_print_page_nav {
4067         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4068         $extra = '' if !defined $extra; # pager or formats
4069
4070         my @navs = qw(summary shortlog log commit commitdiff tree);
4071         if ($suppress) {
4072                 @navs = grep { $_ ne $suppress } @navs;
4073         }
4074
4075         my %arg = map { $_ => {action=>$_} } @navs;
4076         if (defined $head) {
4077                 for (qw(commit commitdiff)) {
4078                         $arg{$_}{'hash'} = $head;
4079                 }
4080                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4081                         for (qw(shortlog log)) {
4082                                 $arg{$_}{'hash'} = $head;
4083                         }
4084                 }
4085         }
4086
4087         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4088         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4089
4090         my @actions = gitweb_get_feature('actions');
4091         my %repl = (
4092                 '%' => '%',
4093                 'n' => $project,         # project name
4094                 'f' => $git_dir,         # project path within filesystem
4095                 'h' => $treehead || '',  # current hash ('h' parameter)
4096                 'b' => $treebase || '',  # hash base ('hb' parameter)
4097         );
4098         while (@actions) {
4099                 my ($label, $link, $pos) = splice(@actions,0,3);
4100                 # insert
4101                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4102                 # munch munch
4103                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4104                 $arg{$label}{'_href'} = $link;
4105         }
4106
4107         print "<div class=\"page_nav\">\n" .
4108                 (join " | ",
4109                  map { $_ eq $current ?
4110                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4111                  } @navs);
4112         print "<br/>\n$extra<br/>\n" .
4113               "</div>\n";
4114 }
4115
4116 # returns a submenu for the nagivation of the refs views (tags, heads,
4117 # remotes) with the current view disabled and the remotes view only
4118 # available if the feature is enabled
4119 sub format_ref_views {
4120         my ($current) = @_;
4121         my @ref_views = qw{tags heads};
4122         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4123         return join " | ", map {
4124                 $_ eq $current ? $_ :
4125                 $cgi->a({-href => href(action=>$_)}, $_)
4126         } @ref_views
4127 }
4128
4129 sub format_paging_nav {
4130         my ($action, $page, $has_next_link) = @_;
4131         my $paging_nav;
4132
4133
4134         if ($page > 0) {
4135                 $paging_nav .=
4136                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4137                         " &sdot; " .
4138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4140         } else {
4141                 $paging_nav .= "first &sdot; prev";
4142         }
4143
4144         if ($has_next_link) {
4145                 $paging_nav .= " &sdot; " .
4146                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4147                                  -accesskey => "n", -title => "Alt-n"}, "next");
4148         } else {
4149                 $paging_nav .= " &sdot; next";
4150         }
4151
4152         return $paging_nav;
4153 }
4154
4155 ## ......................................................................
4156 ## functions printing or outputting HTML: div
4157
4158 sub git_print_header_div {
4159         my ($action, $title, $hash, $hash_base) = @_;
4160         my %args = ();
4161
4162         $args{'action'} = $action;
4163         $args{'hash'} = $hash if $hash;
4164         $args{'hash_base'} = $hash_base if $hash_base;
4165
4166         print "<div class=\"header\">\n" .
4167               $cgi->a({-href => href(%args), -class => "title"},
4168               $title ? $title : $action) .
4169               "\n</div>\n";
4170 }
4171
4172 sub format_repo_url {
4173         my ($name, $url) = @_;
4174         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4175 }
4176
4177 # Group output by placing it in a DIV element and adding a header.
4178 # Options for start_div() can be provided by passing a hash reference as the
4179 # first parameter to the function.
4180 # Options to git_print_header_div() can be provided by passing an array
4181 # reference. This must follow the options to start_div if they are present.
4182 # The content can be a scalar, which is output as-is, a scalar reference, which
4183 # is output after html escaping, an IO handle passed either as *handle or
4184 # *handle{IO}, or a function reference. In the latter case all following
4185 # parameters will be taken as argument to the content function call.
4186 sub git_print_section {
4187         my ($div_args, $header_args, $content);
4188         my $arg = shift;
4189         if (ref($arg) eq 'HASH') {
4190                 $div_args = $arg;
4191                 $arg = shift;
4192         }
4193         if (ref($arg) eq 'ARRAY') {
4194                 $header_args = $arg;
4195                 $arg = shift;
4196         }
4197         $content = $arg;
4198
4199         print $cgi->start_div($div_args);
4200         git_print_header_div(@$header_args);
4201
4202         if (ref($content) eq 'CODE') {
4203                 $content->(@_);
4204         } elsif (ref($content) eq 'SCALAR') {
4205                 print esc_html($$content);
4206         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4207                 print <$content>;
4208         } elsif (!ref($content) && defined($content)) {
4209                 print $content;
4210         }
4211
4212         print $cgi->end_div;
4213 }
4214
4215 sub format_timestamp_html {
4216         my $date = shift;
4217         my $strtime = $date->{'rfc2822'};
4218
4219         my (undef, undef, $datetime_class) =
4220                 gitweb_get_feature('javascript-timezone');
4221         if ($datetime_class) {
4222                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4223         }
4224
4225         my $localtime_format = '(%02d:%02d %s)';
4226         if ($date->{'hour_local'} < 6) {
4227                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4228         }
4229         $strtime .= ' ' .
4230                     sprintf($localtime_format,
4231                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4232
4233         return $strtime;
4234 }
4235
4236 # Outputs the author name and date in long form
4237 sub git_print_authorship {
4238         my $co = shift;
4239         my %opts = @_;
4240         my $tag = $opts{-tag} || 'div';
4241         my $author = $co->{'author_name'};
4242
4243         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4244         print "<$tag class=\"author_date\">" .
4245               format_search_author($author, "author", esc_html($author)) .
4246               " [".format_timestamp_html(\%ad)."]".
4247               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4248               "</$tag>\n";
4249 }
4250
4251 # Outputs table rows containing the full author or committer information,
4252 # in the format expected for 'commit' view (& similar).
4253 # Parameters are a commit hash reference, followed by the list of people
4254 # to output information for. If the list is empty it defaults to both
4255 # author and committer.
4256 sub git_print_authorship_rows {
4257         my $co = shift;
4258         # too bad we can't use @people = @_ || ('author', 'committer')
4259         my @people = @_;
4260         @people = ('author', 'committer') unless @people;
4261         foreach my $who (@people) {
4262                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4263                 print "<tr><td>$who</td><td>" .
4264                       format_search_author($co->{"${who}_name"}, $who,
4265                                            esc_html($co->{"${who}_name"})) . " " .
4266                       format_search_author($co->{"${who}_email"}, $who,
4267                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4268                       "</td><td rowspan=\"2\">" .
4269                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4270                       "</td></tr>\n" .
4271                       "<tr>" .
4272                       "<td></td><td>" .
4273                       format_timestamp_html(\%wd) .
4274                       "</td>" .
4275                       "</tr>\n";
4276         }
4277 }
4278
4279 sub git_print_page_path {
4280         my $name = shift;
4281         my $type = shift;
4282         my $hb = shift;
4283
4284
4285         print "<div class=\"page_path\">";
4286         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4287                       -title => 'tree root'}, to_utf8("[$project]"));
4288         print " / ";
4289         if (defined $name) {
4290                 my @dirname = split '/', $name;
4291                 my $basename = pop @dirname;
4292                 my $fullname = '';
4293
4294                 foreach my $dir (@dirname) {
4295                         $fullname .= ($fullname ? '/' : '') . $dir;
4296                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4297                                                      hash_base=>$hb),
4298                                       -title => $fullname}, esc_path($dir));
4299                         print " / ";
4300                 }
4301                 if (defined $type && $type eq 'blob') {
4302                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4303                                                      hash_base=>$hb),
4304                                       -title => $name}, esc_path($basename));
4305                 } elsif (defined $type && $type eq 'tree') {
4306                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4307                                                      hash_base=>$hb),
4308                                       -title => $name}, esc_path($basename));
4309                         print " / ";
4310                 } else {
4311                         print esc_path($basename);
4312                 }
4313         }
4314         print "<br/></div>\n";
4315 }
4316
4317 sub git_print_log {
4318         my $log = shift;
4319         my %opts = @_;
4320
4321         if ($opts{'-remove_title'}) {
4322                 # remove title, i.e. first line of log
4323                 shift @$log;
4324         }
4325         # remove leading empty lines
4326         while (defined $log->[0] && $log->[0] eq "") {
4327                 shift @$log;
4328         }
4329
4330         # print log
4331         my $signoff = 0;
4332         my $empty = 0;
4333         foreach my $line (@$log) {
4334                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4335                         $signoff = 1;
4336                         $empty = 0;
4337                         if (! $opts{'-remove_signoff'}) {
4338                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4339                                 next;
4340                         } else {
4341                                 # remove signoff lines
4342                                 next;
4343                         }
4344                 } else {
4345                         $signoff = 0;
4346                 }
4347
4348                 # print only one empty line
4349                 # do not print empty line after signoff
4350                 if ($line eq "") {
4351                         next if ($empty || $signoff);
4352                         $empty = 1;
4353                 } else {
4354                         $empty = 0;
4355                 }
4356
4357                 print format_log_line_html($line) . "<br/>\n";
4358         }
4359
4360         if ($opts{'-final_empty_line'}) {
4361                 # end with single empty line
4362                 print "<br/>\n" unless $empty;
4363         }
4364 }
4365
4366 # return link target (what link points to)
4367 sub git_get_link_target {
4368         my $hash = shift;
4369         my $link_target;
4370
4371         # read link
4372         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4373                 or return;
4374         {
4375                 local $/ = undef;
4376                 $link_target = <$fd>;
4377         }
4378         close $fd
4379                 or return;
4380
4381         return $link_target;
4382 }
4383
4384 # given link target, and the directory (basedir) the link is in,
4385 # return target of link relative to top directory (top tree);
4386 # return undef if it is not possible (including absolute links).
4387 sub normalize_link_target {
4388         my ($link_target, $basedir) = @_;
4389
4390         # absolute symlinks (beginning with '/') cannot be normalized
4391         return if (substr($link_target, 0, 1) eq '/');
4392
4393         # normalize link target to path from top (root) tree (dir)
4394         my $path;
4395         if ($basedir) {
4396                 $path = $basedir . '/' . $link_target;
4397         } else {
4398                 # we are in top (root) tree (dir)
4399                 $path = $link_target;
4400         }
4401
4402         # remove //, /./, and /../
4403         my @path_parts;
4404         foreach my $part (split('/', $path)) {
4405                 # discard '.' and ''
4406                 next if (!$part || $part eq '.');
4407                 # handle '..'
4408                 if ($part eq '..') {
4409                         if (@path_parts) {
4410                                 pop @path_parts;
4411                         } else {
4412                                 # link leads outside repository (outside top dir)
4413                                 return;
4414                         }
4415                 } else {
4416                         push @path_parts, $part;
4417                 }
4418         }
4419         $path = join('/', @path_parts);
4420
4421         return $path;
4422 }
4423
4424 # print tree entry (row of git_tree), but without encompassing <tr> element
4425 sub git_print_tree_entry {
4426         my ($t, $basedir, $hash_base, $have_blame) = @_;
4427
4428         my %base_key = ();
4429         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4430
4431         # The format of a table row is: mode list link.  Where mode is
4432         # the mode of the entry, list is the name of the entry, an href,
4433         # and link is the action links of the entry.
4434
4435         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4436         if (exists $t->{'size'}) {
4437                 print "<td class=\"size\">$t->{'size'}</td>\n";
4438         }
4439         if ($t->{'type'} eq "blob") {
4440                 print "<td class=\"list\">" .
4441                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4442                                                file_name=>"$basedir$t->{'name'}", %base_key),
4443                                 -class => "list"}, esc_path($t->{'name'}));
4444                 if (S_ISLNK(oct $t->{'mode'})) {
4445                         my $link_target = git_get_link_target($t->{'hash'});
4446                         if ($link_target) {
4447                                 my $norm_target = normalize_link_target($link_target, $basedir);
4448                                 if (defined $norm_target) {
4449                                         print " -> " .
4450                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4451                                                                      file_name=>$norm_target),
4452                                                        -title => $norm_target}, esc_path($link_target));
4453                                 } else {
4454                                         print " -> " . esc_path($link_target);
4455                                 }
4456                         }
4457                 }
4458                 print "</td>\n";
4459                 print "<td class=\"link\">";
4460                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4461                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4462                               "blob");
4463                 if ($have_blame) {
4464                         print " | " .
4465                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4466                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4467                                       "blame");
4468                 }
4469                 if (defined $hash_base) {
4470                         print " | " .
4471                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4472                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4473                                       "history");
4474                 }
4475                 print " | " .
4476                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4477                                                file_name=>"$basedir$t->{'name'}")},
4478                                 "raw");
4479                 print "</td>\n";
4480
4481         } elsif ($t->{'type'} eq "tree") {
4482                 print "<td class=\"list\">";
4483                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4484                                              file_name=>"$basedir$t->{'name'}",
4485                                              %base_key)},
4486                               esc_path($t->{'name'}));
4487                 print "</td>\n";
4488                 print "<td class=\"link\">";
4489                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4490                                              file_name=>"$basedir$t->{'name'}",
4491                                              %base_key)},
4492                               "tree");
4493                 if (defined $hash_base) {
4494                         print " | " .
4495                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4496                                                      file_name=>"$basedir$t->{'name'}")},
4497                                       "history");
4498                 }
4499                 print "</td>\n";
4500         } else {
4501                 # unknown object: we can only present history for it
4502                 # (this includes 'commit' object, i.e. submodule support)
4503                 print "<td class=\"list\">" .
4504                       esc_path($t->{'name'}) .
4505                       "</td>\n";
4506                 print "<td class=\"link\">";
4507                 if (defined $hash_base) {
4508                         print $cgi->a({-href => href(action=>"history",
4509                                                      hash_base=>$hash_base,
4510                                                      file_name=>"$basedir$t->{'name'}")},
4511                                       "history");
4512                 }
4513                 print "</td>\n";
4514         }
4515 }
4516
4517 ## ......................................................................
4518 ## functions printing large fragments of HTML
4519
4520 # get pre-image filenames for merge (combined) diff
4521 sub fill_from_file_info {
4522         my ($diff, @parents) = @_;
4523
4524         $diff->{'from_file'} = [ ];
4525         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4526         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4527                 if ($diff->{'status'}[$i] eq 'R' ||
4528                     $diff->{'status'}[$i] eq 'C') {
4529                         $diff->{'from_file'}[$i] =
4530                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4531                 }
4532         }
4533
4534         return $diff;
4535 }
4536
4537 # is current raw difftree line of file deletion
4538 sub is_deleted {
4539         my $diffinfo = shift;
4540
4541         return $diffinfo->{'to_id'} eq ('0' x 40);
4542 }
4543
4544 # does patch correspond to [previous] difftree raw line
4545 # $diffinfo  - hashref of parsed raw diff format
4546 # $patchinfo - hashref of parsed patch diff format
4547 #              (the same keys as in $diffinfo)
4548 sub is_patch_split {
4549         my ($diffinfo, $patchinfo) = @_;
4550
4551         return defined $diffinfo && defined $patchinfo
4552                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4553 }
4554
4555
4556 sub git_difftree_body {
4557         my ($difftree, $hash, @parents) = @_;
4558         my ($parent) = $parents[0];
4559         my $have_blame = gitweb_check_feature('blame');
4560         print "<div class=\"list_head\">\n";
4561         if ($#{$difftree} > 10) {
4562                 print(($#{$difftree} + 1) . " files changed:\n");
4563         }
4564         print "</div>\n";
4565
4566         print "<table class=\"" .
4567               (@parents > 1 ? "combined " : "") .
4568               "diff_tree\">\n";
4569
4570         # header only for combined diff in 'commitdiff' view
4571         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4572         if ($has_header) {
4573                 # table header
4574                 print "<thead><tr>\n" .
4575                        "<th></th><th></th>\n"; # filename, patchN link
4576                 for (my $i = 0; $i < @parents; $i++) {
4577                         my $par = $parents[$i];
4578                         print "<th>" .
4579                               $cgi->a({-href => href(action=>"commitdiff",
4580                                                      hash=>$hash, hash_parent=>$par),
4581                                        -title => 'commitdiff to parent number ' .
4582                                                   ($i+1) . ': ' . substr($par,0,7)},
4583                                       $i+1) .
4584                               "&nbsp;</th>\n";
4585                 }
4586                 print "</tr></thead>\n<tbody>\n";
4587         }
4588
4589         my $alternate = 1;
4590         my $patchno = 0;
4591         foreach my $line (@{$difftree}) {
4592                 my $diff = parsed_difftree_line($line);
4593
4594                 if ($alternate) {
4595                         print "<tr class=\"dark\">\n";
4596                 } else {
4597                         print "<tr class=\"light\">\n";
4598                 }
4599                 $alternate ^= 1;
4600
4601                 if (exists $diff->{'nparents'}) { # combined diff
4602
4603                         fill_from_file_info($diff, @parents)
4604                                 unless exists $diff->{'from_file'};
4605
4606                         if (!is_deleted($diff)) {
4607                                 # file exists in the result (child) commit
4608                                 print "<td>" .
4609                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4610                                                              file_name=>$diff->{'to_file'},
4611                                                              hash_base=>$hash),
4612                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4613                                       "</td>\n";
4614                         } else {
4615                                 print "<td>" .
4616                                       esc_path($diff->{'to_file'}) .
4617                                       "</td>\n";
4618                         }
4619
4620                         if ($action eq 'commitdiff') {
4621                                 # link to patch
4622                                 $patchno++;
4623                                 print "<td class=\"link\">" .
4624                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4625                                               "patch") .
4626                                       " | " .
4627                                       "</td>\n";
4628                         }
4629
4630                         my $has_history = 0;
4631                         my $not_deleted = 0;
4632                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4633                                 my $hash_parent = $parents[$i];
4634                                 my $from_hash = $diff->{'from_id'}[$i];
4635                                 my $from_path = $diff->{'from_file'}[$i];
4636                                 my $status = $diff->{'status'}[$i];
4637
4638                                 $has_history ||= ($status ne 'A');
4639                                 $not_deleted ||= ($status ne 'D');
4640
4641                                 if ($status eq 'A') {
4642                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4643                                 } elsif ($status eq 'D') {
4644                                         print "<td class=\"link\">" .
4645                                               $cgi->a({-href => href(action=>"blob",
4646                                                                      hash_base=>$hash,
4647                                                                      hash=>$from_hash,
4648                                                                      file_name=>$from_path)},
4649                                                       "blob" . ($i+1)) .
4650                                               " | </td>\n";
4651                                 } else {
4652                                         if ($diff->{'to_id'} eq $from_hash) {
4653                                                 print "<td class=\"link nochange\">";
4654                                         } else {
4655                                                 print "<td class=\"link\">";
4656                                         }
4657                                         print $cgi->a({-href => href(action=>"blobdiff",
4658                                                                      hash=>$diff->{'to_id'},
4659                                                                      hash_parent=>$from_hash,
4660                                                                      hash_base=>$hash,
4661                                                                      hash_parent_base=>$hash_parent,
4662                                                                      file_name=>$diff->{'to_file'},
4663                                                                      file_parent=>$from_path)},
4664                                                       "diff" . ($i+1)) .
4665                                               " | </td>\n";
4666                                 }
4667                         }
4668
4669                         print "<td class=\"link\">";
4670                         if ($not_deleted) {
4671                                 print $cgi->a({-href => href(action=>"blob",
4672                                                              hash=>$diff->{'to_id'},
4673                                                              file_name=>$diff->{'to_file'},
4674                                                              hash_base=>$hash)},
4675                                               "blob");
4676                                 print " | " if ($has_history);
4677                         }
4678                         if ($has_history) {
4679                                 print $cgi->a({-href => href(action=>"history",
4680                                                              file_name=>$diff->{'to_file'},
4681                                                              hash_base=>$hash)},
4682                                               "history");
4683                         }
4684                         print "</td>\n";
4685
4686                         print "</tr>\n";
4687                         next; # instead of 'else' clause, to avoid extra indent
4688                 }
4689                 # else ordinary diff
4690
4691                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4692                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4693                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4694                         $to_mode_oct = oct $diff->{'to_mode'};
4695                         if (S_ISREG($to_mode_oct)) { # only for regular file
4696                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4697                         }
4698                         $to_file_type = file_type($diff->{'to_mode'});
4699                 }
4700                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4701                         $from_mode_oct = oct $diff->{'from_mode'};
4702                         if (S_ISREG($from_mode_oct)) { # only for regular file
4703                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4704                         }
4705                         $from_file_type = file_type($diff->{'from_mode'});
4706                 }
4707
4708                 if ($diff->{'status'} eq "A") { # created
4709                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4710                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4711                         $mode_chng   .= "]</span>";
4712                         print "<td>";
4713                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4714                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4715                                       -class => "list"}, esc_path($diff->{'file'}));
4716                         print "</td>\n";
4717                         print "<td>$mode_chng</td>\n";
4718                         print "<td class=\"link\">";
4719                         if ($action eq 'commitdiff') {
4720                                 # link to patch
4721                                 $patchno++;
4722                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4723                                               "patch") .
4724                                       " | ";
4725                         }
4726                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4727                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4728                                       "blob");
4729                         print "</td>\n";
4730
4731                 } elsif ($diff->{'status'} eq "D") { # deleted
4732                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4733                         print "<td>";
4734                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4735                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4736                                        -class => "list"}, esc_path($diff->{'file'}));
4737                         print "</td>\n";
4738                         print "<td>$mode_chng</td>\n";
4739                         print "<td class=\"link\">";
4740                         if ($action eq 'commitdiff') {
4741                                 # link to patch
4742                                 $patchno++;
4743                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4744                                               "patch") .
4745                                       " | ";
4746                         }
4747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4748                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4749                                       "blob") . " | ";
4750                         if ($have_blame) {
4751                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4752                                                              file_name=>$diff->{'file'})},
4753                                               "blame") . " | ";
4754                         }
4755                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4756                                                      file_name=>$diff->{'file'})},
4757                                       "history");
4758                         print "</td>\n";
4759
4760                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4761                         my $mode_chnge = "";
4762                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4763                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4764                                 if ($from_file_type ne $to_file_type) {
4765                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4766                                 }
4767                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4768                                         if ($from_mode_str && $to_mode_str) {
4769                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4770                                         } elsif ($to_mode_str) {
4771                                                 $mode_chnge .= " mode: $to_mode_str";
4772                                         }
4773                                 }
4774                                 $mode_chnge .= "]</span>\n";
4775                         }
4776                         print "<td>";
4777                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4778                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4779                                       -class => "list"}, esc_path($diff->{'file'}));
4780                         print "</td>\n";
4781                         print "<td>$mode_chnge</td>\n";
4782                         print "<td class=\"link\">";
4783                         if ($action eq 'commitdiff') {
4784                                 # link to patch
4785                                 $patchno++;
4786                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4787                                               "patch") .
4788                                       " | ";
4789                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4790                                 # "commit" view and modified file (not onlu mode changed)
4791                                 print $cgi->a({-href => href(action=>"blobdiff",
4792                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4793                                                              hash_base=>$hash, hash_parent_base=>$parent,
4794                                                              file_name=>$diff->{'file'})},
4795                                               "diff") .
4796                                       " | ";
4797                         }
4798                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4799                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4800                                        "blob") . " | ";
4801                         if ($have_blame) {
4802                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4803                                                              file_name=>$diff->{'file'})},
4804                                               "blame") . " | ";
4805                         }
4806                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4807                                                      file_name=>$diff->{'file'})},
4808                                       "history");
4809                         print "</td>\n";
4810
4811                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4812                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4813                         my $nstatus = $status_name{$diff->{'status'}};
4814                         my $mode_chng = "";
4815                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4816                                 # mode also for directories, so we cannot use $to_mode_str
4817                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4818                         }
4819                         print "<td>" .
4820                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4821                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4822                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4823                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4824                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4825                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4826                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4827                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4828                               "<td class=\"link\">";
4829                         if ($action eq 'commitdiff') {
4830                                 # link to patch
4831                                 $patchno++;
4832                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4833                                               "patch") .
4834                                       " | ";
4835                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4836                                 # "commit" view and modified file (not only pure rename or copy)
4837                                 print $cgi->a({-href => href(action=>"blobdiff",
4838                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4839                                                              hash_base=>$hash, hash_parent_base=>$parent,
4840                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4841                                               "diff") .
4842                                       " | ";
4843                         }
4844                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4845                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4846                                       "blob") . " | ";
4847                         if ($have_blame) {
4848                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4849                                                              file_name=>$diff->{'to_file'})},
4850                                               "blame") . " | ";
4851                         }
4852                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4853                                                     file_name=>$diff->{'to_file'})},
4854                                       "history");
4855                         print "</td>\n";
4856
4857                 } # we should not encounter Unmerged (U) or Unknown (X) status
4858                 print "</tr>\n";
4859         }
4860         print "</tbody>" if $has_header;
4861         print "</table>\n";
4862 }
4863
4864 sub print_sidebyside_diff_chunk {
4865         my @chunk = @_;
4866         my (@ctx, @rem, @add);
4867
4868         return unless @chunk;
4869
4870         # incomplete last line might be among removed or added lines,
4871         # or both, or among context lines: find which
4872         for (my $i = 1; $i < @chunk; $i++) {
4873                 if ($chunk[$i][0] eq 'incomplete') {
4874                         $chunk[$i][0] = $chunk[$i-1][0];
4875                 }
4876         }
4877
4878         # guardian
4879         push @chunk, ["", ""];
4880
4881         foreach my $line_info (@chunk) {
4882                 my ($class, $line) = @$line_info;
4883
4884                 # print chunk headers
4885                 if ($class && $class eq 'chunk_header') {
4886                         print $line;
4887                         next;
4888                 }
4889
4890                 ## print from accumulator when type of class of lines change
4891                 # empty contents block on start rem/add block, or end of chunk
4892                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4893                         print join '',
4894                                 '<div class="chunk_block ctx">',
4895                                         '<div class="old">',
4896                                         @ctx,
4897                                         '</div>',
4898                                         '<div class="new">',
4899                                         @ctx,
4900                                         '</div>',
4901                                 '</div>';
4902                         @ctx = ();
4903                 }
4904                 # empty add/rem block on start context block, or end of chunk
4905                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4906                         if (!@add) {
4907                                 # pure removal
4908                                 print join '',
4909                                         '<div class="chunk_block rem">',
4910                                                 '<div class="old">',
4911                                                 @rem,
4912                                                 '</div>',
4913                                         '</div>';
4914                         } elsif (!@rem) {
4915                                 # pure addition
4916                                 print join '',
4917                                         '<div class="chunk_block add">',
4918                                                 '<div class="new">',
4919                                                 @add,
4920                                                 '</div>',
4921                                         '</div>';
4922                         } else {
4923                                 # assume that it is change
4924                                 print join '',
4925                                         '<div class="chunk_block chg">',
4926                                                 '<div class="old">',
4927                                                 @rem,
4928                                                 '</div>',
4929                                                 '<div class="new">',
4930                                                 @add,
4931                                                 '</div>',
4932                                         '</div>';
4933                         }
4934                         @rem = @add = ();
4935                 }
4936
4937                 ## adding lines to accumulator
4938                 # guardian value
4939                 last unless $line;
4940                 # rem, add or change
4941                 if ($class eq 'rem') {
4942                         push @rem, $line;
4943                 } elsif ($class eq 'add') {
4944                         push @add, $line;
4945                 }
4946                 # context line
4947                 if ($class eq 'ctx') {
4948                         push @ctx, $line;
4949                 }
4950         }
4951 }
4952
4953 sub git_patchset_body {
4954         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4955         my ($hash_parent) = $hash_parents[0];
4956
4957         my $is_combined = (@hash_parents > 1);
4958         my $patch_idx = 0;
4959         my $patch_number = 0;
4960         my $patch_line;
4961         my $diffinfo;
4962         my $to_name;
4963         my (%from, %to);
4964         my @chunk; # for side-by-side diff
4965
4966         print "<div class=\"patchset\">\n";
4967
4968         # skip to first patch
4969         while ($patch_line = <$fd>) {
4970                 chomp $patch_line;
4971
4972                 last if ($patch_line =~ m/^diff /);
4973         }
4974
4975  PATCH:
4976         while ($patch_line) {
4977
4978                 # parse "git diff" header line
4979                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4980                         # $1 is from_name, which we do not use
4981                         $to_name = unquote($2);
4982                         $to_name =~ s!^b/!!;
4983                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4984                         # $1 is 'cc' or 'combined', which we do not use
4985                         $to_name = unquote($2);
4986                 } else {
4987                         $to_name = undef;
4988                 }
4989
4990                 # check if current patch belong to current raw line
4991                 # and parse raw git-diff line if needed
4992                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4993                         # this is continuation of a split patch
4994                         print "<div class=\"patch cont\">\n";
4995                 } else {
4996                         # advance raw git-diff output if needed
4997                         $patch_idx++ if defined $diffinfo;
4998
4999                         # read and prepare patch information
5000                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5001
5002                         # compact combined diff output can have some patches skipped
5003                         # find which patch (using pathname of result) we are at now;
5004                         if ($is_combined) {
5005                                 while ($to_name ne $diffinfo->{'to_file'}) {
5006                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5007                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5008                                               "</div>\n";  # class="patch"
5009
5010                                         $patch_idx++;
5011                                         $patch_number++;
5012
5013                                         last if $patch_idx > $#$difftree;
5014                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5015                                 }
5016                         }
5017
5018                         # modifies %from, %to hashes
5019                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5020
5021                         # this is first patch for raw difftree line with $patch_idx index
5022                         # we index @$difftree array from 0, but number patches from 1
5023                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5024                 }
5025
5026                 # git diff header
5027                 #assert($patch_line =~ m/^diff /) if DEBUG;
5028                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5029                 $patch_number++;
5030                 # print "git diff" header
5031                 print format_git_diff_header_line($patch_line, $diffinfo,
5032                                                   \%from, \%to);
5033
5034                 # print extended diff header
5035                 print "<div class=\"diff extended_header\">\n";
5036         EXTENDED_HEADER:
5037                 while ($patch_line = <$fd>) {
5038                         chomp $patch_line;
5039
5040                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5041
5042                         print format_extended_diff_header_line($patch_line, $diffinfo,
5043                                                                \%from, \%to);
5044                 }
5045                 print "</div>\n"; # class="diff extended_header"
5046
5047                 # from-file/to-file diff header
5048                 if (! $patch_line) {
5049                         print "</div>\n"; # class="patch"
5050                         last PATCH;
5051                 }
5052                 next PATCH if ($patch_line =~ m/^diff /);
5053                 #assert($patch_line =~ m/^---/) if DEBUG;
5054
5055                 my $last_patch_line = $patch_line;
5056                 $patch_line = <$fd>;
5057                 chomp $patch_line;
5058                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5059
5060                 print format_diff_from_to_header($last_patch_line, $patch_line,
5061                                                  $diffinfo, \%from, \%to,
5062                                                  @hash_parents);
5063
5064                 # the patch itself
5065         LINE:
5066                 while ($patch_line = <$fd>) {
5067                         chomp $patch_line;
5068
5069                         next PATCH if ($patch_line =~ m/^diff /);
5070
5071                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5072                         my $diff_classes = "diff";
5073                         $diff_classes .= " $class" if ($class);
5074                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5075
5076                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5077                                 if ($class eq 'chunk_header') {
5078                                         print_sidebyside_diff_chunk(@chunk);
5079                                         @chunk = ( [ $class, $line ] );
5080                                 } else {
5081                                         push @chunk, [ $class, $line ];
5082                                 }
5083                         } else {
5084                                 # default 'inline' style and unknown styles
5085                                 print $line;
5086                         }
5087                 }
5088
5089         } continue {
5090                 if (@chunk) {
5091                         print_sidebyside_diff_chunk(@chunk);
5092                         @chunk = ();
5093                 }
5094                 print "</div>\n"; # class="patch"
5095         }
5096
5097         # for compact combined (--cc) format, with chunk and patch simplification
5098         # the patchset might be empty, but there might be unprocessed raw lines
5099         for (++$patch_idx if $patch_number > 0;
5100              $patch_idx < @$difftree;
5101              ++$patch_idx) {
5102                 # read and prepare patch information
5103                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5104
5105                 # generate anchor for "patch" links in difftree / whatchanged part
5106                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5107                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5108                       "</div>\n";  # class="patch"
5109
5110                 $patch_number++;
5111         }
5112
5113         if ($patch_number == 0) {
5114                 if (@hash_parents > 1) {
5115                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5116                 } else {
5117                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5118                 }
5119         }
5120
5121         print "</div>\n"; # class="patchset"
5122 }
5123
5124 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5125
5126 # fills project list info (age, description, owner, category, forks)
5127 # for each project in the list, removing invalid projects from
5128 # returned list
5129 # NOTE: modifies $projlist, but does not remove entries from it
5130 sub fill_project_list_info {
5131         my $projlist = shift;
5132         my @projects;
5133
5134         my $show_ctags = gitweb_check_feature('ctags');
5135  PROJECT:
5136         foreach my $pr (@$projlist) {
5137                 my (@activity) = git_get_last_activity($pr->{'path'});
5138                 unless (@activity) {
5139                         next PROJECT;
5140                 }
5141                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5142                 if (!defined $pr->{'descr'}) {
5143                         my $descr = git_get_project_description($pr->{'path'}) || "";
5144                         $descr = to_utf8($descr);
5145                         $pr->{'descr_long'} = $descr;
5146                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5147                 }
5148                 if (!defined $pr->{'owner'}) {
5149                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5150                 }
5151                 if ($show_ctags) {
5152                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5153                 }
5154                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5155                         my $cat = git_get_project_category($pr->{'path'}) ||
5156                                                            $project_list_default_category;
5157                         $pr->{'category'} = to_utf8($cat);
5158                 }
5159
5160                 push @projects, $pr;
5161         }
5162
5163         return @projects;
5164 }
5165
5166 sub sort_projects_list {
5167         my ($projlist, $order) = @_;
5168         my @projects;
5169
5170         my %order_info = (
5171                 project => { key => 'path', type => 'str' },
5172                 descr => { key => 'descr_long', type => 'str' },
5173                 owner => { key => 'owner', type => 'str' },
5174                 age => { key => 'age', type => 'num' }
5175         );
5176         my $oi = $order_info{$order};
5177         return @$projlist unless defined $oi;
5178         if ($oi->{'type'} eq 'str') {
5179                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5180         } else {
5181                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5182         }
5183
5184         return @projects;
5185 }
5186
5187 # returns a hash of categories, containing the list of project
5188 # belonging to each category
5189 sub build_projlist_by_category {
5190         my ($projlist, $from, $to) = @_;
5191         my %categories;
5192
5193         $from = 0 unless defined $from;
5194         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5195
5196         for (my $i = $from; $i <= $to; $i++) {
5197                 my $pr = $projlist->[$i];
5198                 push @{$categories{ $pr->{'category'} }}, $pr;
5199         }
5200
5201         return wantarray ? %categories : \%categories;
5202 }
5203
5204 # print 'sort by' <th> element, generating 'sort by $name' replay link
5205 # if that order is not selected
5206 sub print_sort_th {
5207         print format_sort_th(@_);
5208 }
5209
5210 sub format_sort_th {
5211         my ($name, $order, $header) = @_;
5212         my $sort_th = "";
5213         $header ||= ucfirst($name);
5214
5215         if ($order eq $name) {
5216                 $sort_th .= "<th>$header</th>\n";
5217         } else {
5218                 $sort_th .= "<th>" .
5219                             $cgi->a({-href => href(-replay=>1, order=>$name),
5220                                      -class => "header"}, $header) .
5221                             "</th>\n";
5222         }
5223
5224         return $sort_th;
5225 }
5226
5227 sub git_project_list_rows {
5228         my ($projlist, $from, $to, $check_forks) = @_;
5229
5230         $from = 0 unless defined $from;
5231         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5232
5233         my $alternate = 1;
5234         for (my $i = $from; $i <= $to; $i++) {
5235                 my $pr = $projlist->[$i];
5236
5237                 if ($alternate) {
5238                         print "<tr class=\"dark\">\n";
5239                 } else {
5240                         print "<tr class=\"light\">\n";
5241                 }
5242                 $alternate ^= 1;
5243
5244                 if ($check_forks) {
5245                         print "<td>";
5246                         if ($pr->{'forks'}) {
5247                                 my $nforks = scalar @{$pr->{'forks'}};
5248                                 if ($nforks > 0) {
5249                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5250                                                        -title => "$nforks forks"}, "+");
5251                                 } else {
5252                                         print $cgi->span({-title => "$nforks forks"}, "+");
5253                                 }
5254                         }
5255                         print "</td>\n";
5256                 }
5257                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5258                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5259                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5260                                         -class => "list", -title => $pr->{'descr_long'}},
5261                                         esc_html($pr->{'descr'})) . "</td>\n" .
5262                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5263                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5264                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5265                       "<td class=\"link\">" .
5266                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5267                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5268                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5269                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5270                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5271                       "</td>\n" .
5272                       "</tr>\n";
5273         }
5274 }
5275
5276 sub git_project_list_body {
5277         # actually uses global variable $project
5278         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5279         my @projects = @$projlist;
5280
5281         my $check_forks = gitweb_check_feature('forks');
5282         my $show_ctags  = gitweb_check_feature('ctags');
5283         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5284         $check_forks = undef
5285                 if ($tagfilter || $searchtext);
5286
5287         # filtering out forks before filling info allows to do less work
5288         @projects = filter_forks_from_projects_list(\@projects)
5289                 if ($check_forks);
5290         @projects = fill_project_list_info(\@projects);
5291         # searching projects require filling to be run before it
5292         @projects = search_projects_list(\@projects,
5293                                          'searchtext' => $searchtext,
5294                                          'tagfilter'  => $tagfilter)
5295                 if ($tagfilter || $searchtext);
5296
5297         $order ||= $default_projects_order;
5298         $from = 0 unless defined $from;
5299         $to = $#projects if (!defined $to || $#projects < $to);
5300
5301         # short circuit
5302         if ($from > $to) {
5303                 print "<center>\n".
5304                       "<b>No such projects found</b><br />\n".
5305                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5306                       "</center>\n<br />\n";
5307                 return;
5308         }
5309
5310         @projects = sort_projects_list(\@projects, $order);
5311
5312         if ($show_ctags) {
5313                 my $ctags = git_gather_all_ctags(\@projects);
5314                 my $cloud = git_populate_project_tagcloud($ctags);
5315                 print git_show_project_tagcloud($cloud, 64);
5316         }
5317
5318         print "<table class=\"project_list\">\n";
5319         unless ($no_header) {
5320                 print "<tr>\n";
5321                 if ($check_forks) {
5322                         print "<th></th>\n";
5323                 }
5324                 print_sort_th('project', $order, 'Project');
5325                 print_sort_th('descr', $order, 'Description');
5326                 print_sort_th('owner', $order, 'Owner');
5327                 print_sort_th('age', $order, 'Last Change');
5328                 print "<th></th>\n" . # for links
5329                       "</tr>\n";
5330         }
5331
5332         if ($projects_list_group_categories) {
5333                 # only display categories with projects in the $from-$to window
5334                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5335                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5336                 foreach my $cat (sort keys %categories) {
5337                         unless ($cat eq "") {
5338                                 print "<tr>\n";
5339                                 if ($check_forks) {
5340                                         print "<td></td>\n";
5341                                 }
5342                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5343                                 print "</tr>\n";
5344                         }
5345
5346                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5347                 }
5348         } else {
5349                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5350         }
5351
5352         if (defined $extra) {
5353                 print "<tr>\n";
5354                 if ($check_forks) {
5355                         print "<td></td>\n";
5356                 }
5357                 print "<td colspan=\"5\">$extra</td>\n" .
5358                       "</tr>\n";
5359         }
5360         print "</table>\n";
5361 }
5362
5363 sub git_log_body {
5364         # uses global variable $project
5365         my ($commitlist, $from, $to, $refs, $extra) = @_;
5366
5367         $from = 0 unless defined $from;
5368         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5369
5370         for (my $i = 0; $i <= $to; $i++) {
5371                 my %co = %{$commitlist->[$i]};
5372                 next if !%co;
5373                 my $commit = $co{'id'};
5374                 my $ref = format_ref_marker($refs, $commit);
5375                 git_print_header_div('commit',
5376                                "<span class=\"age\">$co{'age_string'}</span>" .
5377                                esc_html($co{'title'}) . $ref,
5378                                $commit);
5379                 print "<div class=\"title_text\">\n" .
5380                       "<div class=\"log_link\">\n" .
5381                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5382                       " | " .
5383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5384                       " | " .
5385                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5386                       "<br/>\n" .
5387                       "</div>\n";
5388                       git_print_authorship(\%co, -tag => 'span');
5389                       print "<br/>\n</div>\n";
5390
5391                 print "<div class=\"log_body\">\n";
5392                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5393                 print "</div>\n";
5394         }
5395         if ($extra) {
5396                 print "<div class=\"page_nav\">\n";
5397                 print "$extra\n";
5398                 print "</div>\n";
5399         }
5400 }
5401
5402 sub git_shortlog_body {
5403         # uses global variable $project
5404         my ($commitlist, $from, $to, $refs, $extra) = @_;
5405
5406         $from = 0 unless defined $from;
5407         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5408
5409         print "<table class=\"shortlog\">\n";
5410         my $alternate = 1;
5411         for (my $i = $from; $i <= $to; $i++) {
5412                 my %co = %{$commitlist->[$i]};
5413                 my $commit = $co{'id'};
5414                 my $ref = format_ref_marker($refs, $commit);
5415                 if ($alternate) {
5416                         print "<tr class=\"dark\">\n";
5417                 } else {
5418                         print "<tr class=\"light\">\n";
5419                 }
5420                 $alternate ^= 1;
5421                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5422                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5423                       format_author_html('td', \%co, 10) . "<td>";
5424                 print format_subject_html($co{'title'}, $co{'title_short'},
5425                                           href(action=>"commit", hash=>$commit), $ref);
5426                 print "</td>\n" .
5427                       "<td class=\"link\">" .
5428                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5429                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5430                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5431                 my $snapshot_links = format_snapshot_links($commit);
5432                 if (defined $snapshot_links) {
5433                         print " | " . $snapshot_links;
5434                 }
5435                 print "</td>\n" .
5436                       "</tr>\n";
5437         }
5438         if (defined $extra) {
5439                 print "<tr>\n" .
5440                       "<td colspan=\"4\">$extra</td>\n" .
5441                       "</tr>\n";
5442         }
5443         print "</table>\n";
5444 }
5445
5446 sub git_history_body {
5447         # Warning: assumes constant type (blob or tree) during history
5448         my ($commitlist, $from, $to, $refs, $extra,
5449             $file_name, $file_hash, $ftype) = @_;
5450
5451         $from = 0 unless defined $from;
5452         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5453
5454         print "<table class=\"history\">\n";
5455         my $alternate = 1;
5456         for (my $i = $from; $i <= $to; $i++) {
5457                 my %co = %{$commitlist->[$i]};
5458                 if (!%co) {
5459                         next;
5460                 }
5461                 my $commit = $co{'id'};
5462
5463                 my $ref = format_ref_marker($refs, $commit);
5464
5465                 if ($alternate) {
5466                         print "<tr class=\"dark\">\n";
5467                 } else {
5468                         print "<tr class=\"light\">\n";
5469                 }
5470                 $alternate ^= 1;
5471                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5472         # shortlog:   format_author_html('td', \%co, 10)
5473                       format_author_html('td', \%co, 15, 3) . "<td>";
5474                 # originally git_history used chop_str($co{'title'}, 50)
5475                 print format_subject_html($co{'title'}, $co{'title_short'},
5476                                           href(action=>"commit", hash=>$commit), $ref);
5477                 print "</td>\n" .
5478                       "<td class=\"link\">" .
5479                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5480                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5481
5482                 if ($ftype eq 'blob') {
5483                         my $blob_current = $file_hash;
5484                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5485                         if (defined $blob_current && defined $blob_parent &&
5486                                         $blob_current ne $blob_parent) {
5487                                 print " | " .
5488                                         $cgi->a({-href => href(action=>"blobdiff",
5489                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5490                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5491                                                                file_name=>$file_name)},
5492                                                 "diff to current");
5493                         }
5494                 }
5495                 print "</td>\n" .
5496                       "</tr>\n";
5497         }
5498         if (defined $extra) {
5499                 print "<tr>\n" .
5500                       "<td colspan=\"4\">$extra</td>\n" .
5501                       "</tr>\n";
5502         }
5503         print "</table>\n";
5504 }
5505
5506 sub git_tags_body {
5507         # uses global variable $project
5508         my ($taglist, $from, $to, $extra) = @_;
5509         $from = 0 unless defined $from;
5510         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5511
5512         print "<table class=\"tags\">\n";
5513         my $alternate = 1;
5514         for (my $i = $from; $i <= $to; $i++) {
5515                 my $entry = $taglist->[$i];
5516                 my %tag = %$entry;
5517                 my $comment = $tag{'subject'};
5518                 my $comment_short;
5519                 if (defined $comment) {
5520                         $comment_short = chop_str($comment, 30, 5);
5521                 }
5522                 if ($alternate) {
5523                         print "<tr class=\"dark\">\n";
5524                 } else {
5525                         print "<tr class=\"light\">\n";
5526                 }
5527                 $alternate ^= 1;
5528                 if (defined $tag{'age'}) {
5529                         print "<td><i>$tag{'age'}</i></td>\n";
5530                 } else {
5531                         print "<td></td>\n";
5532                 }
5533                 print "<td>" .
5534                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5535                                -class => "list name"}, esc_html($tag{'name'})) .
5536                       "</td>\n" .
5537                       "<td>";
5538                 if (defined $comment) {
5539                         print format_subject_html($comment, $comment_short,
5540                                                   href(action=>"tag", hash=>$tag{'id'}));
5541                 }
5542                 print "</td>\n" .
5543                       "<td class=\"selflink\">";
5544                 if ($tag{'type'} eq "tag") {
5545                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5546                 } else {
5547                         print "&nbsp;";
5548                 }
5549                 print "</td>\n" .
5550                       "<td class=\"link\">" . " | " .
5551                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5552                 if ($tag{'reftype'} eq "commit") {
5553                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5554                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5555                 } elsif ($tag{'reftype'} eq "blob") {
5556                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5557                 }
5558                 print "</td>\n" .
5559                       "</tr>";
5560         }
5561         if (defined $extra) {
5562                 print "<tr>\n" .
5563                       "<td colspan=\"5\">$extra</td>\n" .
5564                       "</tr>\n";
5565         }
5566         print "</table>\n";
5567 }
5568
5569 sub git_heads_body {
5570         # uses global variable $project
5571         my ($headlist, $head, $from, $to, $extra) = @_;
5572         $from = 0 unless defined $from;
5573         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5574
5575         print "<table class=\"heads\">\n";
5576         my $alternate = 1;
5577         for (my $i = $from; $i <= $to; $i++) {
5578                 my $entry = $headlist->[$i];
5579                 my %ref = %$entry;
5580                 my $curr = $ref{'id'} eq $head;
5581                 if ($alternate) {
5582                         print "<tr class=\"dark\">\n";
5583                 } else {
5584                         print "<tr class=\"light\">\n";
5585                 }
5586                 $alternate ^= 1;
5587                 print "<td><i>$ref{'age'}</i></td>\n" .
5588                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5589                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5590                                -class => "list name"},esc_html($ref{'name'})) .
5591                       "</td>\n" .
5592                       "<td class=\"link\">" .
5593                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5594                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5595                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5596                       "</td>\n" .
5597                       "</tr>";
5598         }
5599         if (defined $extra) {
5600                 print "<tr>\n" .
5601                       "<td colspan=\"3\">$extra</td>\n" .
5602                       "</tr>\n";
5603         }
5604         print "</table>\n";
5605 }
5606
5607 # Display a single remote block
5608 sub git_remote_block {
5609         my ($remote, $rdata, $limit, $head) = @_;
5610
5611         my $heads = $rdata->{'heads'};
5612         my $fetch = $rdata->{'fetch'};
5613         my $push = $rdata->{'push'};
5614
5615         my $urls_table = "<table class=\"projects_list\">\n" ;
5616
5617         if (defined $fetch) {
5618                 if ($fetch eq $push) {
5619                         $urls_table .= format_repo_url("URL", $fetch);
5620                 } else {
5621                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5622                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5623                 }
5624         } elsif (defined $push) {
5625                 $urls_table .= format_repo_url("Push URL", $push);
5626         } else {
5627                 $urls_table .= format_repo_url("", "No remote URL");
5628         }
5629
5630         $urls_table .= "</table>\n";
5631
5632         my $dots;
5633         if (defined $limit && $limit < @$heads) {
5634                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5635         }
5636
5637         print $urls_table;
5638         git_heads_body($heads, $head, 0, $limit, $dots);
5639 }
5640
5641 # Display a list of remote names with the respective fetch and push URLs
5642 sub git_remotes_list {
5643         my ($remotedata, $limit) = @_;
5644         print "<table class=\"heads\">\n";
5645         my $alternate = 1;
5646         my @remotes = sort keys %$remotedata;
5647
5648         my $limited = $limit && $limit < @remotes;
5649
5650         $#remotes = $limit - 1 if $limited;
5651
5652         while (my $remote = shift @remotes) {
5653                 my $rdata = $remotedata->{$remote};
5654                 my $fetch = $rdata->{'fetch'};
5655                 my $push = $rdata->{'push'};
5656                 if ($alternate) {
5657                         print "<tr class=\"dark\">\n";
5658                 } else {
5659                         print "<tr class=\"light\">\n";
5660                 }
5661                 $alternate ^= 1;
5662                 print "<td>" .
5663                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5664                                -class=> "list name"},esc_html($remote)) .
5665                       "</td>";
5666                 print "<td class=\"link\">" .
5667                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5668                       " | " .
5669                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5670                       "</td>";
5671
5672                 print "</tr>\n";
5673         }
5674
5675         if ($limited) {
5676                 print "<tr>\n" .
5677                       "<td colspan=\"3\">" .
5678                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5679                       "</td>\n" . "</tr>\n";
5680         }
5681
5682         print "</table>";
5683 }
5684
5685 # Display remote heads grouped by remote, unless there are too many
5686 # remotes, in which case we only display the remote names
5687 sub git_remotes_body {
5688         my ($remotedata, $limit, $head) = @_;
5689         if ($limit and $limit < keys %$remotedata) {
5690                 git_remotes_list($remotedata, $limit);
5691         } else {
5692                 fill_remote_heads($remotedata);
5693                 while (my ($remote, $rdata) = each %$remotedata) {
5694                         git_print_section({-class=>"remote", -id=>$remote},
5695                                 ["remotes", $remote, $remote], sub {
5696                                         git_remote_block($remote, $rdata, $limit, $head);
5697                                 });
5698                 }
5699         }
5700 }
5701
5702 sub git_search_message {
5703         my %co = @_;
5704
5705         my $greptype;
5706         if ($searchtype eq 'commit') {
5707                 $greptype = "--grep=";
5708         } elsif ($searchtype eq 'author') {
5709                 $greptype = "--author=";
5710         } elsif ($searchtype eq 'committer') {
5711                 $greptype = "--committer=";
5712         }
5713         $greptype .= $searchtext;
5714         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5715                                        $greptype, '--regexp-ignore-case',
5716                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5717
5718         my $paging_nav = '';
5719         if ($page > 0) {
5720                 $paging_nav .=
5721                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5722                                 "first") .
5723                         " &sdot; " .
5724                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5725                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5726         } else {
5727                 $paging_nav .= "first &sdot; prev";
5728         }
5729         my $next_link = '';
5730         if ($#commitlist >= 100) {
5731                 $next_link =
5732                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5733                                  -accesskey => "n", -title => "Alt-n"}, "next");
5734                 $paging_nav .= " &sdot; $next_link";
5735         } else {
5736                 $paging_nav .= " &sdot; next";
5737         }
5738
5739         git_header_html();
5740
5741         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5742         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5743         if ($page == 0 && !@commitlist) {
5744                 print "<p>No match.</p>\n";
5745         } else {
5746                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5747         }
5748
5749         git_footer_html();
5750 }
5751
5752 sub git_search_changes {
5753         my %co = @_;
5754
5755         local $/ = "\n";
5756         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5757                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5758                 ($search_use_regexp ? '--pickaxe-regex' : ())
5759                         or die_error(500, "Open git-log failed");
5760
5761         git_header_html();
5762
5763         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5764         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5765
5766         print "<table class=\"pickaxe search\">\n";
5767         my $alternate = 1;
5768         undef %co;
5769         my @files;
5770         while (my $line = <$fd>) {
5771                 chomp $line;
5772                 next unless $line;
5773
5774                 my %set = parse_difftree_raw_line($line);
5775                 if (defined $set{'commit'}) {
5776                         # finish previous commit
5777                         if (%co) {
5778                                 print "</td>\n" .
5779                                       "<td class=\"link\">" .
5780                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5781                                               "commit") .
5782                                       " | " .
5783                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5784                                                              hash_base=>$co{'id'})},
5785                                               "tree") .
5786                                       "</td>\n" .
5787                                       "</tr>\n";
5788                         }
5789
5790                         if ($alternate) {
5791                                 print "<tr class=\"dark\">\n";
5792                         } else {
5793                                 print "<tr class=\"light\">\n";
5794                         }
5795                         $alternate ^= 1;
5796                         %co = parse_commit($set{'commit'});
5797                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5798                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5799                               "<td><i>$author</i></td>\n" .
5800                               "<td>" .
5801                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5802                                       -class => "list subject"},
5803                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5804                 } elsif (defined $set{'to_id'}) {
5805                         next if ($set{'to_id'} =~ m/^0{40}$/);
5806
5807                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5808                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5809                                       -class => "list"},
5810                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5811                               "<br/>\n";
5812                 }
5813         }
5814         close $fd;
5815
5816         # finish last commit (warning: repetition!)
5817         if (%co) {
5818                 print "</td>\n" .
5819                       "<td class=\"link\">" .
5820                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5821                               "commit") .
5822                       " | " .
5823                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5824                                              hash_base=>$co{'id'})},
5825                               "tree") .
5826                       "</td>\n" .
5827                       "</tr>\n";
5828         }
5829
5830         print "</table>\n";
5831
5832         git_footer_html();
5833 }
5834
5835 sub git_search_files {
5836         my %co = @_;
5837
5838         local $/ = "\n";
5839         open my $fd, "-|", git_cmd(), 'grep', '-n',
5840                 $search_use_regexp ? ('-E', '-i') : '-F',
5841                 $searchtext, $co{'tree'}
5842                         or die_error(500, "Open git-grep failed");
5843
5844         git_header_html();
5845
5846         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5847         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5848
5849         print "<table class=\"grep_search\">\n";
5850         my $alternate = 1;
5851         my $matches = 0;
5852         my $lastfile = '';
5853         while (my $line = <$fd>) {
5854                 chomp $line;
5855                 my ($file, $lno, $ltext, $binary);
5856                 last if ($matches++ > 1000);
5857                 if ($line =~ /^Binary file (.+) matches$/) {
5858                         $file = $1;
5859                         $binary = 1;
5860                 } else {
5861                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5862                 }
5863                 if ($file ne $lastfile) {
5864                         $lastfile and print "</td></tr>\n";
5865                         if ($alternate++) {
5866                                 print "<tr class=\"dark\">\n";
5867                         } else {
5868                                 print "<tr class=\"light\">\n";
5869                         }
5870                         print "<td class=\"list\">".
5871                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5872                                                        file_name=>"$file"),
5873                                         -class => "list"}, esc_path($file));
5874                         print "</td><td>\n";
5875                         $lastfile = $file;
5876                 }
5877                 if ($binary) {
5878                         print "<div class=\"binary\">Binary file</div>\n";
5879                 } else {
5880                         $ltext = untabify($ltext);
5881                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5882                                 $ltext = esc_html($1, -nbsp=>1);
5883                                 $ltext .= '<span class="match">';
5884                                 $ltext .= esc_html($2, -nbsp=>1);
5885                                 $ltext .= '</span>';
5886                                 $ltext .= esc_html($3, -nbsp=>1);
5887                         } else {
5888                                 $ltext = esc_html($ltext, -nbsp=>1);
5889                         }
5890                         print "<div class=\"pre\">" .
5891                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5892                                                        file_name=>"$file").'#l'.$lno,
5893                                         -class => "linenr"}, sprintf('%4i', $lno))
5894                                 . ' ' .  $ltext . "</div>\n";
5895                 }
5896         }
5897         if ($lastfile) {
5898                 print "</td></tr>\n";
5899                 if ($matches > 1000) {
5900                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5901                 }
5902         } else {
5903                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5904         }
5905         close $fd;
5906
5907         print "</table>\n";
5908
5909         git_footer_html();
5910 }
5911
5912 sub git_search_grep_body {
5913         my ($commitlist, $from, $to, $extra) = @_;
5914         $from = 0 unless defined $from;
5915         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5916
5917         print "<table class=\"commit_search\">\n";
5918         my $alternate = 1;
5919         for (my $i = $from; $i <= $to; $i++) {
5920                 my %co = %{$commitlist->[$i]};
5921                 if (!%co) {
5922                         next;
5923                 }
5924                 my $commit = $co{'id'};
5925                 if ($alternate) {
5926                         print "<tr class=\"dark\">\n";
5927                 } else {
5928                         print "<tr class=\"light\">\n";
5929                 }
5930                 $alternate ^= 1;
5931                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5932                       format_author_html('td', \%co, 15, 5) .
5933                       "<td>" .
5934                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5935                                -class => "list subject"},
5936                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5937                 my $comment = $co{'comment'};
5938                 foreach my $line (@$comment) {
5939                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5940                                 my ($lead, $match, $trail) = ($1, $2, $3);
5941                                 $match = chop_str($match, 70, 5, 'center');
5942                                 my $contextlen = int((80 - length($match))/2);
5943                                 $contextlen = 30 if ($contextlen > 30);
5944                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5945                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5946
5947                                 $lead  = esc_html($lead);
5948                                 $match = esc_html($match);
5949                                 $trail = esc_html($trail);
5950
5951                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5952                         }
5953                 }
5954                 print "</td>\n" .
5955                       "<td class=\"link\">" .
5956                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5957                       " | " .
5958                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5959                       " | " .
5960                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5961                 print "</td>\n" .
5962                       "</tr>\n";
5963         }
5964         if (defined $extra) {
5965                 print "<tr>\n" .
5966                       "<td colspan=\"3\">$extra</td>\n" .
5967                       "</tr>\n";
5968         }
5969         print "</table>\n";
5970 }
5971
5972 ## ======================================================================
5973 ## ======================================================================
5974 ## actions
5975
5976 sub git_project_list {
5977         my $order = $input_params{'order'};
5978         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5979                 die_error(400, "Unknown order parameter");
5980         }
5981
5982         my @list = git_get_projects_list();
5983         if (!@list) {
5984                 die_error(404, "No projects found");
5985         }
5986
5987         git_header_html();
5988         if (defined $home_text && -f $home_text) {
5989                 print "<div class=\"index_include\">\n";
5990                 insert_file($home_text);
5991                 print "</div>\n";
5992         }
5993         print $cgi->startform(-method => "get") .
5994               "<p class=\"projsearch\">Search:\n" .
5995               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5996               "</p>" .
5997               $cgi->end_form() . "\n";
5998         git_project_list_body(\@list, $order);
5999         git_footer_html();
6000 }
6001
6002 sub git_forks {
6003         my $order = $input_params{'order'};
6004         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6005                 die_error(400, "Unknown order parameter");
6006         }
6007
6008         my @list = git_get_projects_list($project);
6009         if (!@list) {
6010                 die_error(404, "No forks found");
6011         }
6012
6013         git_header_html();
6014         git_print_page_nav('','');
6015         git_print_header_div('summary', "$project forks");
6016         git_project_list_body(\@list, $order);
6017         git_footer_html();
6018 }
6019
6020 sub git_project_index {
6021         my @projects = git_get_projects_list();
6022         if (!@projects) {
6023                 die_error(404, "No projects found");
6024         }
6025
6026         print $cgi->header(
6027                 -type => 'text/plain',
6028                 -charset => 'utf-8',
6029                 -content_disposition => 'inline; filename="index.aux"');
6030
6031         foreach my $pr (@projects) {
6032                 if (!exists $pr->{'owner'}) {
6033                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6034                 }
6035
6036                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6037                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6038                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6039                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6040                 $path  =~ s/ /\+/g;
6041                 $owner =~ s/ /\+/g;
6042
6043                 print "$path $owner\n";
6044         }
6045 }
6046
6047 sub git_summary {
6048         my $descr = git_get_project_description($project) || "none";
6049         my %co = parse_commit("HEAD");
6050         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6051         my $head = $co{'id'};
6052         my $remote_heads = gitweb_check_feature('remote_heads');
6053
6054         my $owner = git_get_project_owner($project);
6055
6056         my $refs = git_get_references();
6057         # These get_*_list functions return one more to allow us to see if
6058         # there are more ...
6059         my @taglist  = git_get_tags_list(16);
6060         my @headlist = git_get_heads_list(16);
6061         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6062         my @forklist;
6063         my $check_forks = gitweb_check_feature('forks');
6064
6065         if ($check_forks) {
6066                 # find forks of a project
6067                 @forklist = git_get_projects_list($project);
6068                 # filter out forks of forks
6069                 @forklist = filter_forks_from_projects_list(\@forklist)
6070                         if (@forklist);
6071         }
6072
6073         git_header_html();
6074         git_print_page_nav('summary','', $head);
6075
6076         print "<div class=\"title\">&nbsp;</div>\n";
6077         print "<table class=\"projects_list\">\n" .
6078               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6079               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6080         if (defined $cd{'rfc2822'}) {
6081                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6082                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6083         }
6084
6085         # use per project git URL list in $projectroot/$project/cloneurl
6086         # or make project git URL from git base URL and project name
6087         my $url_tag = "URL";
6088         my @url_list = git_get_project_url_list($project);
6089         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6090         foreach my $git_url (@url_list) {
6091                 next unless $git_url;
6092                 print format_repo_url($url_tag, $git_url);
6093                 $url_tag = "";
6094         }
6095
6096         # Tag cloud
6097         my $show_ctags = gitweb_check_feature('ctags');
6098         if ($show_ctags) {
6099                 my $ctags = git_get_project_ctags($project);
6100                 if (%$ctags) {
6101                         # without ability to add tags, don't show if there are none
6102                         my $cloud = git_populate_project_tagcloud($ctags);
6103                         print "<tr id=\"metadata_ctags\">" .
6104                               "<td>content tags</td>" .
6105                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6106                               "</tr>\n";
6107                 }
6108         }
6109
6110         print "</table>\n";
6111
6112         # If XSS prevention is on, we don't include README.html.
6113         # TODO: Allow a readme in some safe format.
6114         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6115                 print "<div class=\"title\">readme</div>\n" .
6116                       "<div class=\"readme\">\n";
6117                 insert_file("$projectroot/$project/README.html");
6118                 print "\n</div>\n"; # class="readme"
6119         }
6120
6121         # we need to request one more than 16 (0..15) to check if
6122         # those 16 are all
6123         my @commitlist = $head ? parse_commits($head, 17) : ();
6124         if (@commitlist) {
6125                 git_print_header_div('shortlog');
6126                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6127                                   $#commitlist <=  15 ? undef :
6128                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6129         }
6130
6131         if (@taglist) {
6132                 git_print_header_div('tags');
6133                 git_tags_body(\@taglist, 0, 15,
6134                               $#taglist <=  15 ? undef :
6135                               $cgi->a({-href => href(action=>"tags")}, "..."));
6136         }
6137
6138         if (@headlist) {
6139                 git_print_header_div('heads');
6140                 git_heads_body(\@headlist, $head, 0, 15,
6141                                $#headlist <= 15 ? undef :
6142                                $cgi->a({-href => href(action=>"heads")}, "..."));
6143         }
6144
6145         if (%remotedata) {
6146                 git_print_header_div('remotes');
6147                 git_remotes_body(\%remotedata, 15, $head);
6148         }
6149
6150         if (@forklist) {
6151                 git_print_header_div('forks');
6152                 git_project_list_body(\@forklist, 'age', 0, 15,
6153                                       $#forklist <= 15 ? undef :
6154                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6155                                       'no_header');
6156         }
6157
6158         git_footer_html();
6159 }
6160
6161 sub git_tag {
6162         my %tag = parse_tag($hash);
6163
6164         if (! %tag) {
6165                 die_error(404, "Unknown tag object");
6166         }
6167
6168         my $head = git_get_head_hash($project);
6169         git_header_html();
6170         git_print_page_nav('','', $head,undef,$head);
6171         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6172         print "<div class=\"title_text\">\n" .
6173               "<table class=\"object_header\">\n" .
6174               "<tr>\n" .
6175               "<td>object</td>\n" .
6176               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6177                                $tag{'object'}) . "</td>\n" .
6178               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6179                                               $tag{'type'}) . "</td>\n" .
6180               "</tr>\n";
6181         if (defined($tag{'author'})) {
6182                 git_print_authorship_rows(\%tag, 'author');
6183         }
6184         print "</table>\n\n" .
6185               "</div>\n";
6186         print "<div class=\"page_body\">";
6187         my $comment = $tag{'comment'};
6188         foreach my $line (@$comment) {
6189                 chomp $line;
6190                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6191         }
6192         print "</div>\n";
6193         git_footer_html();
6194 }
6195
6196 sub git_blame_common {
6197         my $format = shift || 'porcelain';
6198         if ($format eq 'porcelain' && $cgi->param('js')) {
6199                 $format = 'incremental';
6200                 $action = 'blame_incremental'; # for page title etc
6201         }
6202
6203         # permissions
6204         gitweb_check_feature('blame')
6205                 or die_error(403, "Blame view not allowed");
6206
6207         # error checking
6208         die_error(400, "No file name given") unless $file_name;
6209         $hash_base ||= git_get_head_hash($project);
6210         die_error(404, "Couldn't find base commit") unless $hash_base;
6211         my %co = parse_commit($hash_base)
6212                 or die_error(404, "Commit not found");
6213         my $ftype = "blob";
6214         if (!defined $hash) {
6215                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6216                         or die_error(404, "Error looking up file");
6217         } else {
6218                 $ftype = git_get_type($hash);
6219                 if ($ftype !~ "blob") {
6220                         die_error(400, "Object is not a blob");
6221                 }
6222         }
6223
6224         my $fd;
6225         if ($format eq 'incremental') {
6226                 # get file contents (as base)
6227                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6228                         or die_error(500, "Open git-cat-file failed");
6229         } elsif ($format eq 'data') {
6230                 # run git-blame --incremental
6231                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6232                         $hash_base, "--", $file_name
6233                         or die_error(500, "Open git-blame --incremental failed");
6234         } else {
6235                 # run git-blame --porcelain
6236                 open $fd, "-|", git_cmd(), "blame", '-p',
6237                         $hash_base, '--', $file_name
6238                         or die_error(500, "Open git-blame --porcelain failed");
6239         }
6240
6241         # incremental blame data returns early
6242         if ($format eq 'data') {
6243                 print $cgi->header(
6244                         -type=>"text/plain", -charset => "utf-8",
6245                         -status=> "200 OK");
6246                 local $| = 1; # output autoflush
6247                 print while <$fd>;
6248                 close $fd
6249                         or print "ERROR $!\n";
6250
6251                 print 'END';
6252                 if (defined $t0 && gitweb_check_feature('timed')) {
6253                         print ' '.
6254                               tv_interval($t0, [ gettimeofday() ]).
6255                               ' '.$number_of_git_cmds;
6256                 }
6257                 print "\n";
6258
6259                 return;
6260         }
6261
6262         # page header
6263         git_header_html();
6264         my $formats_nav =
6265                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6266                         "blob") .
6267                 " | ";
6268         if ($format eq 'incremental') {
6269                 $formats_nav .=
6270                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6271                                 "blame") . " (non-incremental)";
6272         } else {
6273                 $formats_nav .=
6274                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6275                                 "blame") . " (incremental)";
6276         }
6277         $formats_nav .=
6278                 " | " .
6279                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6280                         "history") .
6281                 " | " .
6282                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6283                         "HEAD");
6284         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6285         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6286         git_print_page_path($file_name, $ftype, $hash_base);
6287
6288         # page body
6289         if ($format eq 'incremental') {
6290                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6291                       "This page requires JavaScript to run.\n Use ".
6292                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6293                               'this page').
6294                       " instead.\n".
6295                       "</b></center></div>\n</noscript>\n";
6296
6297                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6298         }
6299
6300         print qq!<div class="page_body">\n!;
6301         print qq!<div id="progress_info">... / ...</div>\n!
6302                 if ($format eq 'incremental');
6303         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6304               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6305               qq!<thead>\n!.
6306               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6307               qq!</thead>\n!.
6308               qq!<tbody>\n!;
6309
6310         my @rev_color = qw(light dark);
6311         my $num_colors = scalar(@rev_color);
6312         my $current_color = 0;
6313
6314         if ($format eq 'incremental') {
6315                 my $color_class = $rev_color[$current_color];
6316
6317                 #contents of a file
6318                 my $linenr = 0;
6319         LINE:
6320                 while (my $line = <$fd>) {
6321                         chomp $line;
6322                         $linenr++;
6323
6324                         print qq!<tr id="l$linenr" class="$color_class">!.
6325                               qq!<td class="sha1"><a href=""> </a></td>!.
6326                               qq!<td class="linenr">!.
6327                               qq!<a class="linenr" href="">$linenr</a></td>!;
6328                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6329                         print qq!</tr>\n!;
6330                 }
6331
6332         } else { # porcelain, i.e. ordinary blame
6333                 my %metainfo = (); # saves information about commits
6334
6335                 # blame data
6336         LINE:
6337                 while (my $line = <$fd>) {
6338                         chomp $line;
6339                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6340                         # no <lines in group> for subsequent lines in group of lines
6341                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6342                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6343                         if (!exists $metainfo{$full_rev}) {
6344                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6345                         }
6346                         my $meta = $metainfo{$full_rev};
6347                         my $data;
6348                         while ($data = <$fd>) {
6349                                 chomp $data;
6350                                 last if ($data =~ s/^\t//); # contents of line
6351                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6352                                         $meta->{$1} = $2 unless exists $meta->{$1};
6353                                 }
6354                                 if ($data =~ /^previous /) {
6355                                         $meta->{'nprevious'}++;
6356                                 }
6357                         }
6358                         my $short_rev = substr($full_rev, 0, 8);
6359                         my $author = $meta->{'author'};
6360                         my %date =
6361                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6362                         my $date = $date{'iso-tz'};
6363                         if ($group_size) {
6364                                 $current_color = ($current_color + 1) % $num_colors;
6365                         }
6366                         my $tr_class = $rev_color[$current_color];
6367                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6368                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6369                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6370                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6371                         if ($group_size) {
6372                                 print "<td class=\"sha1\"";
6373                                 print " title=\"". esc_html($author) . ", $date\"";
6374                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6375                                 print ">";
6376                                 print $cgi->a({-href => href(action=>"commit",
6377                                                              hash=>$full_rev,
6378                                                              file_name=>$file_name)},
6379                                               esc_html($short_rev));
6380                                 if ($group_size >= 2) {
6381                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6382                                         if (@author_initials) {
6383                                                 print "<br />" .
6384                                                       esc_html(join('', @author_initials));
6385                                                 #           or join('.', ...)
6386                                         }
6387                                 }
6388                                 print "</td>\n";
6389                         }
6390                         # 'previous' <sha1 of parent commit> <filename at commit>
6391                         if (exists $meta->{'previous'} &&
6392                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6393                                 $meta->{'parent'} = $1;
6394                                 $meta->{'file_parent'} = unquote($2);
6395                         }
6396                         my $linenr_commit =
6397                                 exists($meta->{'parent'}) ?
6398                                 $meta->{'parent'} : $full_rev;
6399                         my $linenr_filename =
6400                                 exists($meta->{'file_parent'}) ?
6401                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6402                         my $blamed = href(action => 'blame',
6403                                           file_name => $linenr_filename,
6404                                           hash_base => $linenr_commit);
6405                         print "<td class=\"linenr\">";
6406                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6407                                         -class => "linenr" },
6408                                       esc_html($lineno));
6409                         print "</td>";
6410                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6411                         print "</tr>\n";
6412                 } # end while
6413
6414         }
6415
6416         # footer
6417         print "</tbody>\n".
6418               "</table>\n"; # class="blame"
6419         print "</div>\n";   # class="blame_body"
6420         close $fd
6421                 or print "Reading blob failed\n";
6422
6423         git_footer_html();
6424 }
6425
6426 sub git_blame {
6427         git_blame_common();
6428 }
6429
6430 sub git_blame_incremental {
6431         git_blame_common('incremental');
6432 }
6433
6434 sub git_blame_data {
6435         git_blame_common('data');
6436 }
6437
6438 sub git_tags {
6439         my $head = git_get_head_hash($project);
6440         git_header_html();
6441         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6442         git_print_header_div('summary', $project);
6443
6444         my @tagslist = git_get_tags_list();
6445         if (@tagslist) {
6446                 git_tags_body(\@tagslist);
6447         }
6448         git_footer_html();
6449 }
6450
6451 sub git_heads {
6452         my $head = git_get_head_hash($project);
6453         git_header_html();
6454         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6455         git_print_header_div('summary', $project);
6456
6457         my @headslist = git_get_heads_list();
6458         if (@headslist) {
6459                 git_heads_body(\@headslist, $head);
6460         }
6461         git_footer_html();
6462 }
6463
6464 # used both for single remote view and for list of all the remotes
6465 sub git_remotes {
6466         gitweb_check_feature('remote_heads')
6467                 or die_error(403, "Remote heads view is disabled");
6468
6469         my $head = git_get_head_hash($project);
6470         my $remote = $input_params{'hash'};
6471
6472         my $remotedata = git_get_remotes_list($remote);
6473         die_error(500, "Unable to get remote information") unless defined $remotedata;
6474
6475         unless (%$remotedata) {
6476                 die_error(404, defined $remote ?
6477                         "Remote $remote not found" :
6478                         "No remotes found");
6479         }
6480
6481         git_header_html(undef, undef, -action_extra => $remote);
6482         git_print_page_nav('', '',  $head, undef, $head,
6483                 format_ref_views($remote ? '' : 'remotes'));
6484
6485         fill_remote_heads($remotedata);
6486         if (defined $remote) {
6487                 git_print_header_div('remotes', "$remote remote for $project");
6488                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6489         } else {
6490                 git_print_header_div('summary', "$project remotes");
6491                 git_remotes_body($remotedata, undef, $head);
6492         }
6493
6494         git_footer_html();
6495 }
6496
6497 sub git_blob_plain {
6498         my $type = shift;
6499         my $expires;
6500
6501         if (!defined $hash) {
6502                 if (defined $file_name) {
6503                         my $base = $hash_base || git_get_head_hash($project);
6504                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6505                                 or die_error(404, "Cannot find file");
6506                 } else {
6507                         die_error(400, "No file name defined");
6508                 }
6509         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6510                 # blobs defined by non-textual hash id's can be cached
6511                 $expires = "+1d";
6512         }
6513
6514         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6515                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6516
6517         # content-type (can include charset)
6518         $type = blob_contenttype($fd, $file_name, $type);
6519
6520         # "save as" filename, even when no $file_name is given
6521         my $save_as = "$hash";
6522         if (defined $file_name) {
6523                 $save_as = $file_name;
6524         } elsif ($type =~ m/^text\//) {
6525                 $save_as .= '.txt';
6526         }
6527
6528         # With XSS prevention on, blobs of all types except a few known safe
6529         # ones are served with "Content-Disposition: attachment" to make sure
6530         # they don't run in our security domain.  For certain image types,
6531         # blob view writes an <img> tag referring to blob_plain view, and we
6532         # want to be sure not to break that by serving the image as an
6533         # attachment (though Firefox 3 doesn't seem to care).
6534         my $sandbox = $prevent_xss &&
6535                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6536
6537         # serve text/* as text/plain
6538         if ($prevent_xss &&
6539             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6540              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6541                 my $rest = $1;
6542                 $rest = defined $rest ? $rest : '';
6543                 $type = "text/plain$rest";
6544         }
6545
6546         print $cgi->header(
6547                 -type => $type,
6548                 -expires => $expires,
6549                 -content_disposition =>
6550                         ($sandbox ? 'attachment' : 'inline')
6551                         . '; filename="' . $save_as . '"');
6552         local $/ = undef;
6553         binmode STDOUT, ':raw';
6554         print <$fd>;
6555         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6556         close $fd;
6557 }
6558
6559 sub git_blob {
6560         my $expires;
6561
6562         if (!defined $hash) {
6563                 if (defined $file_name) {
6564                         my $base = $hash_base || git_get_head_hash($project);
6565                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6566                                 or die_error(404, "Cannot find file");
6567                 } else {
6568                         die_error(400, "No file name defined");
6569                 }
6570         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6571                 # blobs defined by non-textual hash id's can be cached
6572                 $expires = "+1d";
6573         }
6574
6575         my $have_blame = gitweb_check_feature('blame');
6576         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6577                 or die_error(500, "Couldn't cat $file_name, $hash");
6578         my $mimetype = blob_mimetype($fd, $file_name);
6579         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6580         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6581                 close $fd;
6582                 return git_blob_plain($mimetype);
6583         }
6584         # we can have blame only for text/* mimetype
6585         $have_blame &&= ($mimetype =~ m!^text/!);
6586
6587         my $highlight = gitweb_check_feature('highlight');
6588         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6589         $fd = run_highlighter($fd, $highlight, $syntax)
6590                 if $syntax;
6591
6592         git_header_html(undef, $expires);
6593         my $formats_nav = '';
6594         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6595                 if (defined $file_name) {
6596                         if ($have_blame) {
6597                                 $formats_nav .=
6598                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6599                                                 "blame") .
6600                                         " | ";
6601                         }
6602                         $formats_nav .=
6603                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6604                                         "history") .
6605                                 " | " .
6606                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6607                                         "raw") .
6608                                 " | " .
6609                                 $cgi->a({-href => href(action=>"blob",
6610                                                        hash_base=>"HEAD", file_name=>$file_name)},
6611                                         "HEAD");
6612                 } else {
6613                         $formats_nav .=
6614                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6615                                         "raw");
6616                 }
6617                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6618                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6619         } else {
6620                 print "<div class=\"page_nav\">\n" .
6621                       "<br/><br/></div>\n" .
6622                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6623         }
6624         git_print_page_path($file_name, "blob", $hash_base);
6625         print "<div class=\"page_body\">\n";
6626         if ($mimetype =~ m!^image/!) {
6627                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6628                 if ($file_name) {
6629                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6630                 }
6631                 print qq! src="! .
6632                       href(action=>"blob_plain", hash=>$hash,
6633                            hash_base=>$hash_base, file_name=>$file_name) .
6634                       qq!" />\n!;
6635         } else {
6636                 my $nr;
6637                 while (my $line = <$fd>) {
6638                         chomp $line;
6639                         $nr++;
6640                         $line = untabify($line);
6641                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6642                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6643                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6644                 }
6645         }
6646         close $fd
6647                 or print "Reading blob failed.\n";
6648         print "</div>";
6649         git_footer_html();
6650 }
6651
6652 sub git_tree {
6653         if (!defined $hash_base) {
6654                 $hash_base = "HEAD";
6655         }
6656         if (!defined $hash) {
6657                 if (defined $file_name) {
6658                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6659                 } else {
6660                         $hash = $hash_base;
6661                 }
6662         }
6663         die_error(404, "No such tree") unless defined($hash);
6664
6665         my $show_sizes = gitweb_check_feature('show-sizes');
6666         my $have_blame = gitweb_check_feature('blame');
6667
6668         my @entries = ();
6669         {
6670                 local $/ = "\0";
6671                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6672                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6673                         or die_error(500, "Open git-ls-tree failed");
6674                 @entries = map { chomp; $_ } <$fd>;
6675                 close $fd
6676                         or die_error(404, "Reading tree failed");
6677         }
6678
6679         my $refs = git_get_references();
6680         my $ref = format_ref_marker($refs, $hash_base);
6681         git_header_html();
6682         my $basedir = '';
6683         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6684                 my @views_nav = ();
6685                 if (defined $file_name) {
6686                         push @views_nav,
6687                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6688                                         "history"),
6689                                 $cgi->a({-href => href(action=>"tree",
6690                                                        hash_base=>"HEAD", file_name=>$file_name)},
6691                                         "HEAD"),
6692                 }
6693                 my $snapshot_links = format_snapshot_links($hash);
6694                 if (defined $snapshot_links) {
6695                         # FIXME: Should be available when we have no hash base as well.
6696                         push @views_nav, $snapshot_links;
6697                 }
6698                 git_print_page_nav('tree','', $hash_base, undef, undef,
6699                                    join(' | ', @views_nav));
6700                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6701         } else {
6702                 undef $hash_base;
6703                 print "<div class=\"page_nav\">\n";
6704                 print "<br/><br/></div>\n";
6705                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6706         }
6707         if (defined $file_name) {
6708                 $basedir = $file_name;
6709                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6710                         $basedir .= '/';
6711                 }
6712                 git_print_page_path($file_name, 'tree', $hash_base);
6713         }
6714         print "<div class=\"page_body\">\n";
6715         print "<table class=\"tree\">\n";
6716         my $alternate = 1;
6717         # '..' (top directory) link if possible
6718         if (defined $hash_base &&
6719             defined $file_name && $file_name =~ m![^/]+$!) {
6720                 if ($alternate) {
6721                         print "<tr class=\"dark\">\n";
6722                 } else {
6723                         print "<tr class=\"light\">\n";
6724                 }
6725                 $alternate ^= 1;
6726
6727                 my $up = $file_name;
6728                 $up =~ s!/?[^/]+$!!;
6729                 undef $up unless $up;
6730                 # based on git_print_tree_entry
6731                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6732                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6733                 print '<td class="list">';
6734                 print $cgi->a({-href => href(action=>"tree",
6735                                              hash_base=>$hash_base,
6736                                              file_name=>$up)},
6737                               "..");
6738                 print "</td>\n";
6739                 print "<td class=\"link\"></td>\n";
6740
6741                 print "</tr>\n";
6742         }
6743         foreach my $line (@entries) {
6744                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6745
6746                 if ($alternate) {
6747                         print "<tr class=\"dark\">\n";
6748                 } else {
6749                         print "<tr class=\"light\">\n";
6750                 }
6751                 $alternate ^= 1;
6752
6753                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6754
6755                 print "</tr>\n";
6756         }
6757         print "</table>\n" .
6758               "</div>";
6759         git_footer_html();
6760 }
6761
6762 sub snapshot_name {
6763         my ($project, $hash) = @_;
6764
6765         # path/to/project.git  -> project
6766         # path/to/project/.git -> project
6767         my $name = to_utf8($project);
6768         $name =~ s,([^/])/*\.git$,$1,;
6769         $name = basename($name);
6770         # sanitize name
6771         $name =~ s/[[:cntrl:]]/?/g;
6772
6773         my $ver = $hash;
6774         if ($hash =~ /^[0-9a-fA-F]+$/) {
6775                 # shorten SHA-1 hash
6776                 my $full_hash = git_get_full_hash($project, $hash);
6777                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6778                         $ver = git_get_short_hash($project, $hash);
6779                 }
6780         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6781                 # tags don't need shortened SHA-1 hash
6782                 $ver = $1;
6783         } else {
6784                 # branches and other need shortened SHA-1 hash
6785                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6786                         $ver = $1;
6787                 }
6788                 $ver .= '-' . git_get_short_hash($project, $hash);
6789         }
6790         # in case of hierarchical branch names
6791         $ver =~ s!/!.!g;
6792
6793         # name = project-version_string
6794         $name = "$name-$ver";
6795
6796         return wantarray ? ($name, $name) : $name;
6797 }
6798
6799 sub git_snapshot {
6800         my $format = $input_params{'snapshot_format'};
6801         if (!@snapshot_fmts) {
6802                 die_error(403, "Snapshots not allowed");
6803         }
6804         # default to first supported snapshot format
6805         $format ||= $snapshot_fmts[0];
6806         if ($format !~ m/^[a-z0-9]+$/) {
6807                 die_error(400, "Invalid snapshot format parameter");
6808         } elsif (!exists($known_snapshot_formats{$format})) {
6809                 die_error(400, "Unknown snapshot format");
6810         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6811                 die_error(403, "Snapshot format not allowed");
6812         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6813                 die_error(403, "Unsupported snapshot format");
6814         }
6815
6816         my $type = git_get_type("$hash^{}");
6817         if (!$type) {
6818                 die_error(404, 'Object does not exist');
6819         }  elsif ($type eq 'blob') {
6820                 die_error(400, 'Object is not a tree-ish');
6821         }
6822
6823         my ($name, $prefix) = snapshot_name($project, $hash);
6824         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6825         my $cmd = quote_command(
6826                 git_cmd(), 'archive',
6827                 "--format=$known_snapshot_formats{$format}{'format'}",
6828                 "--prefix=$prefix/", $hash);
6829         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6830                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6831         }
6832
6833         $filename =~ s/(["\\])/\\$1/g;
6834         print $cgi->header(
6835                 -type => $known_snapshot_formats{$format}{'type'},
6836                 -content_disposition => 'inline; filename="' . $filename . '"',
6837                 -status => '200 OK');
6838
6839         open my $fd, "-|", $cmd
6840                 or die_error(500, "Execute git-archive failed");
6841         binmode STDOUT, ':raw';
6842         print <$fd>;
6843         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6844         close $fd;
6845 }
6846
6847 sub git_log_generic {
6848         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6849
6850         my $head = git_get_head_hash($project);
6851         if (!defined $base) {
6852                 $base = $head;
6853         }
6854         if (!defined $page) {
6855                 $page = 0;
6856         }
6857         my $refs = git_get_references();
6858
6859         my $commit_hash = $base;
6860         if (defined $parent) {
6861                 $commit_hash = "$parent..$base";
6862         }
6863         my @commitlist =
6864                 parse_commits($commit_hash, 101, (100 * $page),
6865                               defined $file_name ? ($file_name, "--full-history") : ());
6866
6867         my $ftype;
6868         if (!defined $file_hash && defined $file_name) {
6869                 # some commits could have deleted file in question,
6870                 # and not have it in tree, but one of them has to have it
6871                 for (my $i = 0; $i < @commitlist; $i++) {
6872                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6873                         last if defined $file_hash;
6874                 }
6875         }
6876         if (defined $file_hash) {
6877                 $ftype = git_get_type($file_hash);
6878         }
6879         if (defined $file_name && !defined $ftype) {
6880                 die_error(500, "Unknown type of object");
6881         }
6882         my %co;
6883         if (defined $file_name) {
6884                 %co = parse_commit($base)
6885                         or die_error(404, "Unknown commit object");
6886         }
6887
6888
6889         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6890         my $next_link = '';
6891         if ($#commitlist >= 100) {
6892                 $next_link =
6893                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6894                                  -accesskey => "n", -title => "Alt-n"}, "next");
6895         }
6896         my $patch_max = gitweb_get_feature('patches');
6897         if ($patch_max && !defined $file_name) {
6898                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6899                         $paging_nav .= " &sdot; " .
6900                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6901                                         "patches");
6902                 }
6903         }
6904
6905         git_header_html();
6906         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6907         if (defined $file_name) {
6908                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6909         } else {
6910                 git_print_header_div('summary', $project)
6911         }
6912         git_print_page_path($file_name, $ftype, $hash_base)
6913                 if (defined $file_name);
6914
6915         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6916                      $file_name, $file_hash, $ftype);
6917
6918         git_footer_html();
6919 }
6920
6921 sub git_log {
6922         git_log_generic('log', \&git_log_body,
6923                         $hash, $hash_parent);
6924 }
6925
6926 sub git_commit {
6927         $hash ||= $hash_base || "HEAD";
6928         my %co = parse_commit($hash)
6929             or die_error(404, "Unknown commit object");
6930
6931         my $parent  = $co{'parent'};
6932         my $parents = $co{'parents'}; # listref
6933
6934         # we need to prepare $formats_nav before any parameter munging
6935         my $formats_nav;
6936         if (!defined $parent) {
6937                 # --root commitdiff
6938                 $formats_nav .= '(initial)';
6939         } elsif (@$parents == 1) {
6940                 # single parent commit
6941                 $formats_nav .=
6942                         '(parent: ' .
6943                         $cgi->a({-href => href(action=>"commit",
6944                                                hash=>$parent)},
6945                                 esc_html(substr($parent, 0, 7))) .
6946                         ')';
6947         } else {
6948                 # merge commit
6949                 $formats_nav .=
6950                         '(merge: ' .
6951                         join(' ', map {
6952                                 $cgi->a({-href => href(action=>"commit",
6953                                                        hash=>$_)},
6954                                         esc_html(substr($_, 0, 7)));
6955                         } @$parents ) .
6956                         ')';
6957         }
6958         if (gitweb_check_feature('patches') && @$parents <= 1) {
6959                 $formats_nav .= " | " .
6960                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6961                                 "patch");
6962         }
6963
6964         if (!defined $parent) {
6965                 $parent = "--root";
6966         }
6967         my @difftree;
6968         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6969                 @diff_opts,
6970                 (@$parents <= 1 ? $parent : '-c'),
6971                 $hash, "--"
6972                 or die_error(500, "Open git-diff-tree failed");
6973         @difftree = map { chomp; $_ } <$fd>;
6974         close $fd or die_error(404, "Reading git-diff-tree failed");
6975
6976         # non-textual hash id's can be cached
6977         my $expires;
6978         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6979                 $expires = "+1d";
6980         }
6981         my $refs = git_get_references();
6982         my $ref = format_ref_marker($refs, $co{'id'});
6983
6984         git_header_html(undef, $expires);
6985         git_print_page_nav('commit', '',
6986                            $hash, $co{'tree'}, $hash,
6987                            $formats_nav);
6988
6989         if (defined $co{'parent'}) {
6990                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6991         } else {
6992                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6993         }
6994         print "<div class=\"title_text\">\n" .
6995               "<table class=\"object_header\">\n";
6996         git_print_authorship_rows(\%co);
6997         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6998         print "<tr>" .
6999               "<td>tree</td>" .
7000               "<td class=\"sha1\">" .
7001               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7002                        class => "list"}, $co{'tree'}) .
7003               "</td>" .
7004               "<td class=\"link\">" .
7005               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7006                       "tree");
7007         my $snapshot_links = format_snapshot_links($hash);
7008         if (defined $snapshot_links) {
7009                 print " | " . $snapshot_links;
7010         }
7011         print "</td>" .
7012               "</tr>\n";
7013
7014         foreach my $par (@$parents) {
7015                 print "<tr>" .
7016                       "<td>parent</td>" .
7017                       "<td class=\"sha1\">" .
7018                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7019                                class => "list"}, $par) .
7020                       "</td>" .
7021                       "<td class=\"link\">" .
7022                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7023                       " | " .
7024                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7025                       "</td>" .
7026                       "</tr>\n";
7027         }
7028         print "</table>".
7029               "</div>\n";
7030
7031         print "<div class=\"page_body\">\n";
7032         git_print_log($co{'comment'});
7033         print "</div>\n";
7034
7035         git_difftree_body(\@difftree, $hash, @$parents);
7036
7037         git_footer_html();
7038 }
7039
7040 sub git_object {
7041         # object is defined by:
7042         # - hash or hash_base alone
7043         # - hash_base and file_name
7044         my $type;
7045
7046         # - hash or hash_base alone
7047         if ($hash || ($hash_base && !defined $file_name)) {
7048                 my $object_id = $hash || $hash_base;
7049
7050                 open my $fd, "-|", quote_command(
7051                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7052                         or die_error(404, "Object does not exist");
7053                 $type = <$fd>;
7054                 chomp $type;
7055                 close $fd
7056                         or die_error(404, "Object does not exist");
7057
7058         # - hash_base and file_name
7059         } elsif ($hash_base && defined $file_name) {
7060                 $file_name =~ s,/+$,,;
7061
7062                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7063                         or die_error(404, "Base object does not exist");
7064
7065                 # here errors should not hapen
7066                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7067                         or die_error(500, "Open git-ls-tree failed");
7068                 my $line = <$fd>;
7069                 close $fd;
7070
7071                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7072                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7073                         die_error(404, "File or directory for given base does not exist");
7074                 }
7075                 $type = $2;
7076                 $hash = $3;
7077         } else {
7078                 die_error(400, "Not enough information to find object");
7079         }
7080
7081         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7082                                           hash=>$hash, hash_base=>$hash_base,
7083                                           file_name=>$file_name),
7084                              -status => '302 Found');
7085 }
7086
7087 sub git_blobdiff {
7088         my $format = shift || 'html';
7089         my $diff_style = $input_params{'diff_style'} || 'inline';
7090
7091         my $fd;
7092         my @difftree;
7093         my %diffinfo;
7094         my $expires;
7095
7096         # preparing $fd and %diffinfo for git_patchset_body
7097         # new style URI
7098         if (defined $hash_base && defined $hash_parent_base) {
7099                 if (defined $file_name) {
7100                         # read raw output
7101                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7102                                 $hash_parent_base, $hash_base,
7103                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7104                                 or die_error(500, "Open git-diff-tree failed");
7105                         @difftree = map { chomp; $_ } <$fd>;
7106                         close $fd
7107                                 or die_error(404, "Reading git-diff-tree failed");
7108                         @difftree
7109                                 or die_error(404, "Blob diff not found");
7110
7111                 } elsif (defined $hash &&
7112                          $hash =~ /[0-9a-fA-F]{40}/) {
7113                         # try to find filename from $hash
7114
7115                         # read filtered raw output
7116                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7117                                 $hash_parent_base, $hash_base, "--"
7118                                 or die_error(500, "Open git-diff-tree failed");
7119                         @difftree =
7120                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7121                                 # $hash == to_id
7122                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7123                                 map { chomp; $_ } <$fd>;
7124                         close $fd
7125                                 or die_error(404, "Reading git-diff-tree failed");
7126                         @difftree
7127                                 or die_error(404, "Blob diff not found");
7128
7129                 } else {
7130                         die_error(400, "Missing one of the blob diff parameters");
7131                 }
7132
7133                 if (@difftree > 1) {
7134                         die_error(400, "Ambiguous blob diff specification");
7135                 }
7136
7137                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7138                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7139                 $file_name   ||= $diffinfo{'to_file'};
7140
7141                 $hash_parent ||= $diffinfo{'from_id'};
7142                 $hash        ||= $diffinfo{'to_id'};
7143
7144                 # non-textual hash id's can be cached
7145                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7146                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7147                         $expires = '+1d';
7148                 }
7149
7150                 # open patch output
7151                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7152                         '-p', ($format eq 'html' ? "--full-index" : ()),
7153                         $hash_parent_base, $hash_base,
7154                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7155                         or die_error(500, "Open git-diff-tree failed");
7156         }
7157
7158         # old/legacy style URI -- not generated anymore since 1.4.3.
7159         if (!%diffinfo) {
7160                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7161         }
7162
7163         # header
7164         if ($format eq 'html') {
7165                 my $formats_nav =
7166                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7167                                 "raw");
7168                 git_header_html(undef, $expires);
7169                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7170                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7171                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7172                 } else {
7173                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7174                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7175                 }
7176                 if (defined $file_name) {
7177                         git_print_page_path($file_name, "blob", $hash_base);
7178                 } else {
7179                         print "<div class=\"page_path\"></div>\n";
7180                 }
7181
7182         } elsif ($format eq 'plain') {
7183                 print $cgi->header(
7184                         -type => 'text/plain',
7185                         -charset => 'utf-8',
7186                         -expires => $expires,
7187                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7188
7189                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7190
7191         } else {
7192                 die_error(400, "Unknown blobdiff format");
7193         }
7194
7195         # patch
7196         if ($format eq 'html') {
7197                 print "<div class=\"page_body\">\n";
7198
7199                 git_patchset_body($fd, $diff_style,
7200                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7201                 close $fd;
7202
7203                 print "</div>\n"; # class="page_body"
7204                 git_footer_html();
7205
7206         } else {
7207                 while (my $line = <$fd>) {
7208                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7209                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7210
7211                         print $line;
7212
7213                         last if $line =~ m!^\+\+\+!;
7214                 }
7215                 local $/ = undef;
7216                 print <$fd>;
7217                 close $fd;
7218         }
7219 }
7220
7221 sub git_blobdiff_plain {
7222         git_blobdiff('plain');
7223 }
7224
7225 sub git_commitdiff {
7226         my %params = @_;
7227         my $format = $params{-format} || 'html';
7228         my $diff_style = $input_params{'diff_style'} || 'inline';
7229
7230         my ($patch_max) = gitweb_get_feature('patches');
7231         if ($format eq 'patch') {
7232                 die_error(403, "Patch view not allowed") unless $patch_max;
7233         }
7234
7235         $hash ||= $hash_base || "HEAD";
7236         my %co = parse_commit($hash)
7237             or die_error(404, "Unknown commit object");
7238
7239         # choose format for commitdiff for merge
7240         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7241                 $hash_parent = '--cc';
7242         }
7243         # we need to prepare $formats_nav before almost any parameter munging
7244         my $formats_nav;
7245         if ($format eq 'html') {
7246                 $formats_nav =
7247                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7248                                 "raw");
7249                 if ($patch_max && @{$co{'parents'}} <= 1) {
7250                         $formats_nav .= " | " .
7251                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7252                                         "patch");
7253                 }
7254
7255                 if (defined $hash_parent &&
7256                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7257                         # commitdiff with two commits given
7258                         my $hash_parent_short = $hash_parent;
7259                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7260                                 $hash_parent_short = substr($hash_parent, 0, 7);
7261                         }
7262                         $formats_nav .=
7263                                 ' (from';
7264                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7265                                 if ($co{'parents'}[$i] eq $hash_parent) {
7266                                         $formats_nav .= ' parent ' . ($i+1);
7267                                         last;
7268                                 }
7269                         }
7270                         $formats_nav .= ': ' .
7271                                 $cgi->a({-href => href(-replay=>1,
7272                                                        hash=>$hash_parent, hash_base=>undef)},
7273                                         esc_html($hash_parent_short)) .
7274                                 ')';
7275                 } elsif (!$co{'parent'}) {
7276                         # --root commitdiff
7277                         $formats_nav .= ' (initial)';
7278                 } elsif (scalar @{$co{'parents'}} == 1) {
7279                         # single parent commit
7280                         $formats_nav .=
7281                                 ' (parent: ' .
7282                                 $cgi->a({-href => href(-replay=>1,
7283                                                        hash=>$co{'parent'}, hash_base=>undef)},
7284                                         esc_html(substr($co{'parent'}, 0, 7))) .
7285                                 ')';
7286                 } else {
7287                         # merge commit
7288                         if ($hash_parent eq '--cc') {
7289                                 $formats_nav .= ' | ' .
7290                                         $cgi->a({-href => href(-replay=>1,
7291                                                                hash=>$hash, hash_parent=>'-c')},
7292                                                 'combined');
7293                         } else { # $hash_parent eq '-c'
7294                                 $formats_nav .= ' | ' .
7295                                         $cgi->a({-href => href(-replay=>1,
7296                                                                hash=>$hash, hash_parent=>'--cc')},
7297                                                 'compact');
7298                         }
7299                         $formats_nav .=
7300                                 ' (merge: ' .
7301                                 join(' ', map {
7302                                         $cgi->a({-href => href(-replay=>1,
7303                                                                hash=>$_, hash_base=>undef)},
7304                                                 esc_html(substr($_, 0, 7)));
7305                                 } @{$co{'parents'}} ) .
7306                                 ')';
7307                 }
7308         }
7309
7310         my $hash_parent_param = $hash_parent;
7311         if (!defined $hash_parent_param) {
7312                 # --cc for multiple parents, --root for parentless
7313                 $hash_parent_param =
7314                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7315         }
7316
7317         # read commitdiff
7318         my $fd;
7319         my @difftree;
7320         if ($format eq 'html') {
7321                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7322                         "--no-commit-id", "--patch-with-raw", "--full-index",
7323                         $hash_parent_param, $hash, "--"
7324                         or die_error(500, "Open git-diff-tree failed");
7325
7326                 while (my $line = <$fd>) {
7327                         chomp $line;
7328                         # empty line ends raw part of diff-tree output
7329                         last unless $line;
7330                         push @difftree, scalar parse_difftree_raw_line($line);
7331                 }
7332
7333         } elsif ($format eq 'plain') {
7334                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7335                         '-p', $hash_parent_param, $hash, "--"
7336                         or die_error(500, "Open git-diff-tree failed");
7337         } elsif ($format eq 'patch') {
7338                 # For commit ranges, we limit the output to the number of
7339                 # patches specified in the 'patches' feature.
7340                 # For single commits, we limit the output to a single patch,
7341                 # diverging from the git-format-patch default.
7342                 my @commit_spec = ();
7343                 if ($hash_parent) {
7344                         if ($patch_max > 0) {
7345                                 push @commit_spec, "-$patch_max";
7346                         }
7347                         push @commit_spec, '-n', "$hash_parent..$hash";
7348                 } else {
7349                         if ($params{-single}) {
7350                                 push @commit_spec, '-1';
7351                         } else {
7352                                 if ($patch_max > 0) {
7353                                         push @commit_spec, "-$patch_max";
7354                                 }
7355                                 push @commit_spec, "-n";
7356                         }
7357                         push @commit_spec, '--root', $hash;
7358                 }
7359                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7360                         '--encoding=utf8', '--stdout', @commit_spec
7361                         or die_error(500, "Open git-format-patch failed");
7362         } else {
7363                 die_error(400, "Unknown commitdiff format");
7364         }
7365
7366         # non-textual hash id's can be cached
7367         my $expires;
7368         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7369                 $expires = "+1d";
7370         }
7371
7372         # write commit message
7373         if ($format eq 'html') {
7374                 my $refs = git_get_references();
7375                 my $ref = format_ref_marker($refs, $co{'id'});
7376
7377                 git_header_html(undef, $expires);
7378                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7379                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7380                 print "<div class=\"title_text\">\n" .
7381                       "<table class=\"object_header\">\n";
7382                 git_print_authorship_rows(\%co);
7383                 print "</table>".
7384                       "</div>\n";
7385                 print "<div class=\"page_body\">\n";
7386                 if (@{$co{'comment'}} > 1) {
7387                         print "<div class=\"log\">\n";
7388                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7389                         print "</div>\n"; # class="log"
7390                 }
7391
7392         } elsif ($format eq 'plain') {
7393                 my $refs = git_get_references("tags");
7394                 my $tagname = git_get_rev_name_tags($hash);
7395                 my $filename = basename($project) . "-$hash.patch";
7396
7397                 print $cgi->header(
7398                         -type => 'text/plain',
7399                         -charset => 'utf-8',
7400                         -expires => $expires,
7401                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7402                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7403                 print "From: " . to_utf8($co{'author'}) . "\n";
7404                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7405                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7406
7407                 print "X-Git-Tag: $tagname\n" if $tagname;
7408                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7409
7410                 foreach my $line (@{$co{'comment'}}) {
7411                         print to_utf8($line) . "\n";
7412                 }
7413                 print "---\n\n";
7414         } elsif ($format eq 'patch') {
7415                 my $filename = basename($project) . "-$hash.patch";
7416
7417                 print $cgi->header(
7418                         -type => 'text/plain',
7419                         -charset => 'utf-8',
7420                         -expires => $expires,
7421                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7422         }
7423
7424         # write patch
7425         if ($format eq 'html') {
7426                 my $use_parents = !defined $hash_parent ||
7427                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7428                 git_difftree_body(\@difftree, $hash,
7429                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7430                 print "<br/>\n";
7431
7432                 git_patchset_body($fd, $diff_style,
7433                                   \@difftree, $hash,
7434                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7435                 close $fd;
7436                 print "</div>\n"; # class="page_body"
7437                 git_footer_html();
7438
7439         } elsif ($format eq 'plain') {
7440                 local $/ = undef;
7441                 print <$fd>;
7442                 close $fd
7443                         or print "Reading git-diff-tree failed\n";
7444         } elsif ($format eq 'patch') {
7445                 local $/ = undef;
7446                 print <$fd>;
7447                 close $fd
7448                         or print "Reading git-format-patch failed\n";
7449         }
7450 }
7451
7452 sub git_commitdiff_plain {
7453         git_commitdiff(-format => 'plain');
7454 }
7455
7456 # format-patch-style patches
7457 sub git_patch {
7458         git_commitdiff(-format => 'patch', -single => 1);
7459 }
7460
7461 sub git_patches {
7462         git_commitdiff(-format => 'patch');
7463 }
7464
7465 sub git_history {
7466         git_log_generic('history', \&git_history_body,
7467                         $hash_base, $hash_parent_base,
7468                         $file_name, $hash);
7469 }
7470
7471 sub git_search {
7472         $searchtype ||= 'commit';
7473
7474         # check if appropriate features are enabled
7475         gitweb_check_feature('search')
7476                 or die_error(403, "Search is disabled");
7477         if ($searchtype eq 'pickaxe') {
7478                 # pickaxe may take all resources of your box and run for several minutes
7479                 # with every query - so decide by yourself how public you make this feature
7480                 gitweb_check_feature('pickaxe')
7481                         or die_error(403, "Pickaxe search is disabled");
7482         }
7483         if ($searchtype eq 'grep') {
7484                 # grep search might be potentially CPU-intensive, too
7485                 gitweb_check_feature('grep')
7486                         or die_error(403, "Grep search is disabled");
7487         }
7488
7489         if (!defined $searchtext) {
7490                 die_error(400, "Text field is empty");
7491         }
7492         if (!defined $hash) {
7493                 $hash = git_get_head_hash($project);
7494         }
7495         my %co = parse_commit($hash);
7496         if (!%co) {
7497                 die_error(404, "Unknown commit object");
7498         }
7499         if (!defined $page) {
7500                 $page = 0;
7501         }
7502
7503         if ($searchtype eq 'commit' ||
7504             $searchtype eq 'author' ||
7505             $searchtype eq 'committer') {
7506                 git_search_message(%co);
7507         } elsif ($searchtype eq 'pickaxe') {
7508                 git_search_changes(%co);
7509         } elsif ($searchtype eq 'grep') {
7510                 git_search_files(%co);
7511         } else {
7512                 die_error(400, "Unknown search type");
7513         }
7514 }
7515
7516 sub git_search_help {
7517         git_header_html();
7518         git_print_page_nav('','', $hash,$hash,$hash);
7519         print <<EOT;
7520 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7521 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7522 the pattern entered is recognized as the POSIX extended
7523 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7524 insensitive).</p>
7525 <dl>
7526 <dt><b>commit</b></dt>
7527 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7528 EOT
7529         my $have_grep = gitweb_check_feature('grep');
7530         if ($have_grep) {
7531                 print <<EOT;
7532 <dt><b>grep</b></dt>
7533 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7534     a different one) are searched for the given pattern. On large trees, this search can take
7535 a while and put some strain on the server, so please use it with some consideration. Note that
7536 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7537 case-sensitive.</dd>
7538 EOT
7539         }
7540         print <<EOT;
7541 <dt><b>author</b></dt>
7542 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7543 <dt><b>committer</b></dt>
7544 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7545 EOT
7546         my $have_pickaxe = gitweb_check_feature('pickaxe');
7547         if ($have_pickaxe) {
7548                 print <<EOT;
7549 <dt><b>pickaxe</b></dt>
7550 <dd>All commits that caused the string to appear or disappear from any file (changes that
7551 added, removed or "modified" the string) will be listed. This search can take a while and
7552 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7553 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7554 EOT
7555         }
7556         print "</dl>\n";
7557         git_footer_html();
7558 }
7559
7560 sub git_shortlog {
7561         git_log_generic('shortlog', \&git_shortlog_body,
7562                         $hash, $hash_parent);
7563 }
7564
7565 ## ......................................................................
7566 ## feeds (RSS, Atom; OPML)
7567
7568 sub git_feed {
7569         my $format = shift || 'atom';
7570         my $have_blame = gitweb_check_feature('blame');
7571
7572         # Atom: http://www.atomenabled.org/developers/syndication/
7573         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7574         if ($format ne 'rss' && $format ne 'atom') {
7575                 die_error(400, "Unknown web feed format");
7576         }
7577
7578         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7579         my $head = $hash || 'HEAD';
7580         my @commitlist = parse_commits($head, 150, 0, $file_name);
7581
7582         my %latest_commit;
7583         my %latest_date;
7584         my $content_type = "application/$format+xml";
7585         if (defined $cgi->http('HTTP_ACCEPT') &&
7586                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7587                 # browser (feed reader) prefers text/xml
7588                 $content_type = 'text/xml';
7589         }
7590         if (defined($commitlist[0])) {
7591                 %latest_commit = %{$commitlist[0]};
7592                 my $latest_epoch = $latest_commit{'committer_epoch'};
7593                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7594                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7595                 if (defined $if_modified) {
7596                         my $since;
7597                         if (eval { require HTTP::Date; 1; }) {
7598                                 $since = HTTP::Date::str2time($if_modified);
7599                         } elsif (eval { require Time::ParseDate; 1; }) {
7600                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7601                         }
7602                         if (defined $since && $latest_epoch <= $since) {
7603                                 print $cgi->header(
7604                                         -type => $content_type,
7605                                         -charset => 'utf-8',
7606                                         -last_modified => $latest_date{'rfc2822'},
7607                                         -status => '304 Not Modified');
7608                                 return;
7609                         }
7610                 }
7611                 print $cgi->header(
7612                         -type => $content_type,
7613                         -charset => 'utf-8',
7614                         -last_modified => $latest_date{'rfc2822'});
7615         } else {
7616                 print $cgi->header(
7617                         -type => $content_type,
7618                         -charset => 'utf-8');
7619         }
7620
7621         # Optimization: skip generating the body if client asks only
7622         # for Last-Modified date.
7623         return if ($cgi->request_method() eq 'HEAD');
7624
7625         # header variables
7626         my $title = "$site_name - $project/$action";
7627         my $feed_type = 'log';
7628         if (defined $hash) {
7629                 $title .= " - '$hash'";
7630                 $feed_type = 'branch log';
7631                 if (defined $file_name) {
7632                         $title .= " :: $file_name";
7633                         $feed_type = 'history';
7634                 }
7635         } elsif (defined $file_name) {
7636                 $title .= " - $file_name";
7637                 $feed_type = 'history';
7638         }
7639         $title .= " $feed_type";
7640         my $descr = git_get_project_description($project);
7641         if (defined $descr) {
7642                 $descr = esc_html($descr);
7643         } else {
7644                 $descr = "$project " .
7645                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7646                          " feed";
7647         }
7648         my $owner = git_get_project_owner($project);
7649         $owner = esc_html($owner);
7650
7651         #header
7652         my $alt_url;
7653         if (defined $file_name) {
7654                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7655         } elsif (defined $hash) {
7656                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7657         } else {
7658                 $alt_url = href(-full=>1, action=>"summary");
7659         }
7660         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7661         if ($format eq 'rss') {
7662                 print <<XML;
7663 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7664 <channel>
7665 XML
7666                 print "<title>$title</title>\n" .
7667                       "<link>$alt_url</link>\n" .
7668                       "<description>$descr</description>\n" .
7669                       "<language>en</language>\n" .
7670                       # project owner is responsible for 'editorial' content
7671                       "<managingEditor>$owner</managingEditor>\n";
7672                 if (defined $logo || defined $favicon) {
7673                         # prefer the logo to the favicon, since RSS
7674                         # doesn't allow both
7675                         my $img = esc_url($logo || $favicon);
7676                         print "<image>\n" .
7677                               "<url>$img</url>\n" .
7678                               "<title>$title</title>\n" .
7679                               "<link>$alt_url</link>\n" .
7680                               "</image>\n";
7681                 }
7682                 if (%latest_date) {
7683                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7684                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7685                 }
7686                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7687         } elsif ($format eq 'atom') {
7688                 print <<XML;
7689 <feed xmlns="http://www.w3.org/2005/Atom">
7690 XML
7691                 print "<title>$title</title>\n" .
7692                       "<subtitle>$descr</subtitle>\n" .
7693                       '<link rel="alternate" type="text/html" href="' .
7694                       $alt_url . '" />' . "\n" .
7695                       '<link rel="self" type="' . $content_type . '" href="' .
7696                       $cgi->self_url() . '" />' . "\n" .
7697                       "<id>" . href(-full=>1) . "</id>\n" .
7698                       # use project owner for feed author
7699                       "<author><name>$owner</name></author>\n";
7700                 if (defined $favicon) {
7701                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7702                 }
7703                 if (defined $logo) {
7704                         # not twice as wide as tall: 72 x 27 pixels
7705                         print "<logo>" . esc_url($logo) . "</logo>\n";
7706                 }
7707                 if (! %latest_date) {
7708                         # dummy date to keep the feed valid until commits trickle in:
7709                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7710                 } else {
7711                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7712                 }
7713                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7714         }
7715
7716         # contents
7717         for (my $i = 0; $i <= $#commitlist; $i++) {
7718                 my %co = %{$commitlist[$i]};
7719                 my $commit = $co{'id'};
7720                 # we read 150, we always show 30 and the ones more recent than 48 hours
7721                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7722                         last;
7723                 }
7724                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7725
7726                 # get list of changed files
7727                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7728                         $co{'parent'} || "--root",
7729                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7730                         or next;
7731                 my @difftree = map { chomp; $_ } <$fd>;
7732                 close $fd
7733                         or next;
7734
7735                 # print element (entry, item)
7736                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7737                 if ($format eq 'rss') {
7738                         print "<item>\n" .
7739                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7740                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7741                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7742                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7743                               "<link>$co_url</link>\n" .
7744                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7745                               "<content:encoded>" .
7746                               "<![CDATA[\n";
7747                 } elsif ($format eq 'atom') {
7748                         print "<entry>\n" .
7749                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7750                               "<updated>$cd{'iso-8601'}</updated>\n" .
7751                               "<author>\n" .
7752                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7753                         if ($co{'author_email'}) {
7754                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7755                         }
7756                         print "</author>\n" .
7757                               # use committer for contributor
7758                               "<contributor>\n" .
7759                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7760                         if ($co{'committer_email'}) {
7761                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7762                         }
7763                         print "</contributor>\n" .
7764                               "<published>$cd{'iso-8601'}</published>\n" .
7765                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7766                               "<id>$co_url</id>\n" .
7767                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7768                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7769                 }
7770                 my $comment = $co{'comment'};
7771                 print "<pre>\n";
7772                 foreach my $line (@$comment) {
7773                         $line = esc_html($line);
7774                         print "$line\n";
7775                 }
7776                 print "</pre><ul>\n";
7777                 foreach my $difftree_line (@difftree) {
7778                         my %difftree = parse_difftree_raw_line($difftree_line);
7779                         next if !$difftree{'from_id'};
7780
7781                         my $file = $difftree{'file'} || $difftree{'to_file'};
7782
7783                         print "<li>" .
7784                               "[" .
7785                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7786                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7787                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7788                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7789                                       -title => "diff"}, 'D');
7790                         if ($have_blame) {
7791                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7792                                                              file_name=>$file, hash_base=>$commit),
7793                                               -title => "blame"}, 'B');
7794                         }
7795                         # if this is not a feed of a file history
7796                         if (!defined $file_name || $file_name ne $file) {
7797                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7798                                                              file_name=>$file, hash=>$commit),
7799                                               -title => "history"}, 'H');
7800                         }
7801                         $file = esc_path($file);
7802                         print "] ".
7803                               "$file</li>\n";
7804                 }
7805                 if ($format eq 'rss') {
7806                         print "</ul>]]>\n" .
7807                               "</content:encoded>\n" .
7808                               "</item>\n";
7809                 } elsif ($format eq 'atom') {
7810                         print "</ul>\n</div>\n" .
7811                               "</content>\n" .
7812                               "</entry>\n";
7813                 }
7814         }
7815
7816         # end of feed
7817         if ($format eq 'rss') {
7818                 print "</channel>\n</rss>\n";
7819         } elsif ($format eq 'atom') {
7820                 print "</feed>\n";
7821         }
7822 }
7823
7824 sub git_rss {
7825         git_feed('rss');
7826 }
7827
7828 sub git_atom {
7829         git_feed('atom');
7830 }
7831
7832 sub git_opml {
7833         my @list = git_get_projects_list();
7834         if (!@list) {
7835                 die_error(404, "No projects found");
7836         }
7837
7838         print $cgi->header(
7839                 -type => 'text/xml',
7840                 -charset => 'utf-8',
7841                 -content_disposition => 'inline; filename="opml.xml"');
7842
7843         print <<XML;
7844 <?xml version="1.0" encoding="utf-8"?>
7845 <opml version="1.0">
7846 <head>
7847   <title>$site_name OPML Export</title>
7848 </head>
7849 <body>
7850 <outline text="git RSS feeds">
7851 XML
7852
7853         foreach my $pr (@list) {
7854                 my %proj = %$pr;
7855                 my $head = git_get_head_hash($proj{'path'});
7856                 if (!defined $head) {
7857                         next;
7858                 }
7859                 $git_dir = "$projectroot/$proj{'path'}";
7860                 my %co = parse_commit($head);
7861                 if (!%co) {
7862                         next;
7863                 }
7864
7865                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7866                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7867                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7868                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7869         }
7870         print <<XML;
7871 </outline>
7872 </body>
7873 </opml>
7874 XML
7875 }