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 $path_info = decode_utf8($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 # don't generate age column on the projects list page
 138 our $omit_age_column = 0;
 139
 140 # don't generate information about owners of repositories
 141 our $omit_owner=0;
 142
 143 # show repository only if this subroutine returns true
 144 # when given the path to the project, for example:
 145 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 146 our $export_auth_hook = undef;
 147
 148 # only allow viewing of repositories also shown on the overview page
 149 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 150
 151 # list of git base URLs used for URL to where fetch project from,
 152 # i.e. full URL is "$git_base_url/$project"
 153 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 154
 155 # default blob_plain mimetype and default charset for text/plain blob
 156 our $default_blob_plain_mimetype = 'text/plain';
 157 our $default_text_plain_charset  = undef;
 158
 159 # file to use for guessing MIME types before trying /etc/mime.types
 160 # (relative to the current git repository)
 161 our $mimetypes_file = undef;
 162
 163 # assume this charset if line contains non-UTF-8 characters;
 164 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 165 # for which encoding all byte sequences are valid, for example
 166 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 167 # could be even 'utf-8' for the old behavior)
 168 our $fallback_encoding = 'latin1';
 169
 170 # rename detection options for git-diff and git-diff-tree
 171 # - default is '-M', with the cost proportional to
 172 #   (number of removed files) * (number of new files).
 173 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 174 #   (number of changed files + number of removed files) * (number of new files)
 175 # - even more costly is '-C', '--find-copies-harder' with cost
 176 #   (number of files in the original tree) * (number of new files)
 177 # - one might want to include '-B' option, e.g. '-B', '-M'
 178 our @diff_opts = ('-M'); # taken from git_commit
 179
 180 # Disables features that would allow repository owners to inject script into
 181 # the gitweb domain.
 182 our $prevent_xss = 0;
 183
 184 # Path to the highlight executable to use (must be the one from
 185 # http://www.andre-simon.de due to assumptions about parameters and output).
 186 # Useful if highlight is not installed on your webserver's PATH.
 187 # [Default: highlight]
 188 our $highlight_bin = "++HIGHLIGHT_BIN++";
 189
 190 # information about snapshot formats that gitweb is capable of serving
 191 our %known_snapshot_formats = (
 192         # name => {
 193         #       'display' => display name,
 194         #       'type' => mime type,
 195         #       'suffix' => filename suffix,
 196         #       'format' => --format for git-archive,
 197         #       'compressor' => [compressor command and arguments]
 198         #                       (array reference, optional)
 199         #       'disabled' => boolean (optional)}
 200         #
 201         'tgz' => {
 202                 'display' => 'tar.gz',
 203                 'type' => 'application/x-gzip',
 204                 'suffix' => '.tar.gz',
 205                 'format' => 'tar',
 206                 'compressor' => ['gzip', '-n']},
 207
 208         'tbz2' => {
 209                 'display' => 'tar.bz2',
 210                 'type' => 'application/x-bzip2',
 211                 'suffix' => '.tar.bz2',
 212                 'format' => 'tar',
 213                 'compressor' => ['bzip2']},
 214
 215         'txz' => {
 216                 'display' => 'tar.xz',
 217                 'type' => 'application/x-xz',
 218                 'suffix' => '.tar.xz',
 219                 'format' => 'tar',
 220                 'compressor' => ['xz'],
 221                 'disabled' => 1},
 222
 223         'zip' => {
 224                 'display' => 'zip',
 225                 'type' => 'application/x-zip',
 226                 'suffix' => '.zip',
 227                 'format' => 'zip'},
 228 );
 229
 230 # Aliases so we understand old gitweb.snapshot values in repository
 231 # configuration.
 232 our %known_snapshot_format_aliases = (
 233         'gzip'  => 'tgz',
 234         'bzip2' => 'tbz2',
 235         'xz'    => 'txz',
 236
 237         # backward compatibility: legacy gitweb config support
 238         'x-gzip' => undef, 'gz' => undef,
 239         'x-bzip2' => undef, 'bz2' => undef,
 240         'x-zip' => undef, '' => undef,
 241 );
 242
 243 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 244 # are changed, it may be appropriate to change these values too via
 245 # $GITWEB_CONFIG.
 246 our %avatar_size = (
 247         'default' => 16,
 248         'double'  => 32
 249 );
 250
 251 # Used to set the maximum load that we will still respond to gitweb queries.
 252 # If server load exceed this value then return "503 server busy" error.
 253 # If gitweb cannot determined server load, it is taken to be 0.
 254 # Leave it undefined (or set to 'undef') to turn off load checking.
 255 our $maxload = 300;
 256
 257 # configuration for 'highlight' (http://www.andre-simon.de/)
 258 # match by basename
 259 our %highlight_basename = (
 260         #'Program' => 'py',
 261         #'Library' => 'py',
 262         'SConstruct' => 'py', # SCons equivalent of Makefile
 263         'Makefile' => 'make',
 264 );
 265 # match by extension
 266 our %highlight_ext = (
 267         # main extensions, defining name of syntax;
 268         # see files in /usr/share/highlight/langDefs/ directory
 269         map { $_ => $_ }
 270                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 271         # alternate extensions, see /etc/highlight/filetypes.conf
 272         'h' => 'c',
 273         map { $_ => 'sh'  } qw(bash zsh ksh),
 274         map { $_ => 'cpp' } qw(cxx c++ cc),
 275         map { $_ => 'php' } qw(php3 php4 php5 phps),
 276         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 277         map { $_ => 'make'} qw(mak mk),
 278         map { $_ => 'xml' } qw(xhtml html htm),
 279 );
 280
 281 # You define site-wide feature defaults here; override them with
 282 # $GITWEB_CONFIG as necessary.
 283 our %feature = (
 284         # feature => {
 285         #       'sub' => feature-sub (subroutine),
 286         #       'override' => allow-override (boolean),
 287         #       'default' => [ default options...] (array reference)}
 288         #
 289         # if feature is overridable (it means that allow-override has true value),
 290         # then feature-sub will be called with default options as parameters;
 291         # return value of feature-sub indicates if to enable specified feature
 292         #
 293         # if there is no 'sub' key (no feature-sub), then feature cannot be
 294         # overridden
 295         #
 296         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 297         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 298         # is enabled
 299
 300         # Enable the 'blame' blob view, showing the last commit that modified
 301         # each line in the file. This can be very CPU-intensive.
 302
 303         # To enable system wide have in $GITWEB_CONFIG
 304         # $feature{'blame'}{'default'} = [1];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'blame'}{'override'} = 1;
 307         # and in project config gitweb.blame = 0|1;
 308         'blame' => {
 309                 'sub' => sub { feature_bool('blame', @_) },
 310                 'override' => 0,
 311                 'default' => [0]},
 312
 313         # Enable the 'snapshot' link, providing a compressed archive of any
 314         # tree. This can potentially generate high traffic if you have large
 315         # project.
 316
 317         # Value is a list of formats defined in %known_snapshot_formats that
 318         # you wish to offer.
 319         # To disable system wide have in $GITWEB_CONFIG
 320         # $feature{'snapshot'}{'default'} = [];
 321         # To have project specific config enable override in $GITWEB_CONFIG
 322         # $feature{'snapshot'}{'override'} = 1;
 323         # and in project config, a comma-separated list of formats or "none"
 324         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 325         'snapshot' => {
 326                 'sub' => \&feature_snapshot,
 327                 'override' => 0,
 328                 'default' => ['tgz']},
 329
 330         # Enable text search, which will list the commits which match author,
 331         # committer or commit text to a given string.  Enabled by default.
 332         # Project specific override is not supported.
 333         #
 334         # Note that this controls all search features, which means that if
 335         # it is disabled, then 'grep' and 'pickaxe' search would also be
 336         # disabled.
 337         'search' => {
 338                 'override' => 0,
 339                 'default' => [1]},
 340
 341         # Enable grep search, which will list the files in currently selected
 342         # tree containing the given string. Enabled by default. This can be
 343         # potentially CPU-intensive, of course.
 344         # Note that you need to have 'search' feature enabled too.
 345
 346         # To enable system wide have in $GITWEB_CONFIG
 347         # $feature{'grep'}{'default'} = [1];
 348         # To have project specific config enable override in $GITWEB_CONFIG
 349         # $feature{'grep'}{'override'} = 1;
 350         # and in project config gitweb.grep = 0|1;
 351         'grep' => {
 352                 'sub' => sub { feature_bool('grep', @_) },
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Enable the pickaxe search, which will list the commits that modified
 357         # a given string in a file. This can be practical and quite faster
 358         # alternative to 'blame', but still potentially CPU-intensive.
 359         # Note that you need to have 'search' feature enabled too.
 360
 361         # To enable system wide have in $GITWEB_CONFIG
 362         # $feature{'pickaxe'}{'default'} = [1];
 363         # To have project specific config enable override in $GITWEB_CONFIG
 364         # $feature{'pickaxe'}{'override'} = 1;
 365         # and in project config gitweb.pickaxe = 0|1;
 366         'pickaxe' => {
 367                 'sub' => sub { feature_bool('pickaxe', @_) },
 368                 'override' => 0,
 369                 'default' => [1]},
 370
 371         # Enable showing size of blobs in a 'tree' view, in a separate
 372         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 373
 374         # To disable system wide have in $GITWEB_CONFIG
 375         # $feature{'show-sizes'}{'default'} = [0];
 376         # To have project specific config enable override in $GITWEB_CONFIG
 377         # $feature{'show-sizes'}{'override'} = 1;
 378         # and in project config gitweb.showsizes = 0|1;
 379         'show-sizes' => {
 380                 'sub' => sub { feature_bool('showsizes', @_) },
 381                 'override' => 0,
 382                 'default' => [1]},
 383
 384         # Make gitweb use an alternative format of the URLs which can be
 385         # more readable and natural-looking: project name is embedded
 386         # directly in the path and the query string contains other
 387         # auxiliary information. All gitweb installations recognize
 388         # URL in either format; this configures in which formats gitweb
 389         # generates links.
 390
 391         # To enable system wide have in $GITWEB_CONFIG
 392         # $feature{'pathinfo'}{'default'} = [1];
 393         # Project specific override is not supported.
 394
 395         # Note that you will need to change the default location of CSS,
 396         # favicon, logo and possibly other files to an absolute URL. Also,
 397         # if gitweb.cgi serves as your indexfile, you will need to force
 398         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 399         'pathinfo' => {
 400                 'override' => 0,
 401                 'default' => [0]},
 402
 403         # Make gitweb consider projects in project root subdirectories
 404         # to be forks of existing projects. Given project $projname.git,
 405         # projects matching $projname/*.git will not be shown in the main
 406         # projects list, instead a '+' mark will be added to $projname
 407         # there and a 'forks' view will be enabled for the project, listing
 408         # all the forks. If project list is taken from a file, forks have
 409         # to be listed after the main project.
 410
 411         # To enable system wide have in $GITWEB_CONFIG
 412         # $feature{'forks'}{'default'} = [1];
 413         # Project specific override is not supported.
 414         'forks' => {
 415                 'override' => 0,
 416                 'default' => [0]},
 417
 418         # Insert custom links to the action bar of all project pages.
 419         # This enables you mainly to link to third-party scripts integrating
 420         # into gitweb; e.g. git-browser for graphical history representation
 421         # or custom web-based repository administration interface.
 422
 423         # The 'default' value consists of a list of triplets in the form
 424         # (label, link, position) where position is the label after which
 425         # to insert the link and link is a format string where %n expands
 426         # to the project name, %f to the project path within the filesystem,
 427         # %h to the current hash (h gitweb parameter) and %b to the current
 428         # hash base (hb gitweb parameter); %% expands to %.
 429
 430         # To enable system wide have in $GITWEB_CONFIG e.g.
 431         # $feature{'actions'}{'default'} = [('graphiclog',
 432         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 433         # Project specific override is not supported.
 434         'actions' => {
 435                 'override' => 0,
 436                 'default' => []},
 437
 438         # Allow gitweb scan project content tags of project repository,
 439         # and display the popular Web 2.0-ish "tag cloud" near the projects
 440         # list.  Note that this is something COMPLETELY different from the
 441         # normal Git tags.
 442
 443         # gitweb by itself can show existing tags, but it does not handle
 444         # tagging itself; you need to do it externally, outside gitweb.
 445         # The format is described in git_get_project_ctags() subroutine.
 446         # You may want to install the HTML::TagCloud Perl module to get
 447         # a pretty tag cloud instead of just a list of tags.
 448
 449         # To enable system wide have in $GITWEB_CONFIG
 450         # $feature{'ctags'}{'default'} = [1];
 451         # Project specific override is not supported.
 452
 453         # In the future whether ctags editing is enabled might depend
 454         # on the value, but using 1 should always mean no editing of ctags.
 455         'ctags' => {
 456                 'override' => 0,
 457                 'default' => [0]},
 458
 459         # The maximum number of patches in a patchset generated in patch
 460         # view. Set this to 0 or undef to disable patch view, or to a
 461         # negative number to remove any limit.
 462
 463         # To disable system wide have in $GITWEB_CONFIG
 464         # $feature{'patches'}{'default'} = [0];
 465         # To have project specific config enable override in $GITWEB_CONFIG
 466         # $feature{'patches'}{'override'} = 1;
 467         # and in project config gitweb.patches = 0|n;
 468         # where n is the maximum number of patches allowed in a patchset.
 469         'patches' => {
 470                 'sub' => \&feature_patches,
 471                 'override' => 0,
 472                 'default' => [16]},
 473
 474         # Avatar support. When this feature is enabled, views such as
 475         # shortlog or commit will display an avatar associated with
 476         # the email of the committer(s) and/or author(s).
 477
 478         # Currently available providers are gravatar and picon.
 479         # If an unknown provider is specified, the feature is disabled.
 480
 481         # Gravatar depends on Digest::MD5.
 482         # Picon currently relies on the indiana.edu database.
 483
 484         # To enable system wide have in $GITWEB_CONFIG
 485         # $feature{'avatar'}{'default'} = ['<provider>'];
 486         # where <provider> is either gravatar or picon.
 487         # To have project specific config enable override in $GITWEB_CONFIG
 488         # $feature{'avatar'}{'override'} = 1;
 489         # and in project config gitweb.avatar = <provider>;
 490         'avatar' => {
 491                 'sub' => \&feature_avatar,
 492                 'override' => 0,
 493                 'default' => ['']},
 494
 495         # Enable displaying how much time and how many git commands
 496         # it took to generate and display page.  Disabled by default.
 497         # Project specific override is not supported.
 498         'timed' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable turning some links into links to actions which require
 503         # JavaScript to run (like 'blame_incremental').  Not enabled by
 504         # default.  Project specific override is currently not supported.
 505         'javascript-actions' => {
 506                 'override' => 0,
 507                 'default' => [0]},
 508
 509         # Enable and configure ability to change common timezone for dates
 510         # in gitweb output via JavaScript.  Enabled by default.
 511         # Project specific override is not supported.
 512         'javascript-timezone' => {
 513                 'override' => 0,
 514                 'default' => [
 515                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 516                                      # or undef to turn off this feature
 517                         'gitweb_tz', # name of cookie where to store selected timezone
 518                         'datetime',  # CSS class used to mark up dates for manipulation
 519                 ]},
 520
 521         # Syntax highlighting support. This is based on Daniel Svensson's
 522         # and Sham Chukoury's work in gitweb-xmms2.git.
 523         # It requires the 'highlight' program present in $PATH,
 524         # and therefore is disabled by default.
 525
 526         # To enable system wide have in $GITWEB_CONFIG
 527         # $feature{'highlight'}{'default'} = [1];
 528
 529         'highlight' => {
 530                 'sub' => sub { feature_bool('highlight', @_) },
 531                 'override' => 0,
 532                 'default' => [0]},
 533
 534         # Enable displaying of remote heads in the heads list
 535
 536         # To enable system wide have in $GITWEB_CONFIG
 537         # $feature{'remote_heads'}{'default'} = [1];
 538         # To have project specific config enable override in $GITWEB_CONFIG
 539         # $feature{'remote_heads'}{'override'} = 1;
 540         # and in project config gitweb.remote_heads = 0|1;
 541         'remote_heads' => {
 542                 'sub' => sub { feature_bool('remote_heads', @_) },
 543                 'override' => 0,
 544                 'default' => [0]},
 545 );
 546
 547 sub gitweb_get_feature {
 548         my ($name) = @_;
 549         return unless exists $feature{$name};
 550         my ($sub, $override, @defaults) = (
 551                 $feature{$name}{'sub'},
 552                 $feature{$name}{'override'},
 553                 @{$feature{$name}{'default'}});
 554         # project specific override is possible only if we have project
 555         our $git_dir; # global variable, declared later
 556         if (!$override || !defined $git_dir) {
 557                 return @defaults;
 558         }
 559         if (!defined $sub) {
 560                 warn "feature $name is not overridable";
 561                 return @defaults;
 562         }
 563         return $sub->(@defaults);
 564 }
 565
 566 # A wrapper to check if a given feature is enabled.
 567 # With this, you can say
 568 #
 569 #   my $bool_feat = gitweb_check_feature('bool_feat');
 570 #   gitweb_check_feature('bool_feat') or somecode;
 571 #
 572 # instead of
 573 #
 574 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 575 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 576 #
 577 sub gitweb_check_feature {
 578         return (gitweb_get_feature(@_))[0];
 579 }
 580
 581
 582 sub feature_bool {
 583         my $key = shift;
 584         my ($val) = git_get_project_config($key, '--bool');
 585
 586         if (!defined $val) {
 587                 return ($_[0]);
 588         } elsif ($val eq 'true') {
 589                 return (1);
 590         } elsif ($val eq 'false') {
 591                 return (0);
 592         }
 593 }
 594
 595 sub feature_snapshot {
 596         my (@fmts) = @_;
 597
 598         my ($val) = git_get_project_config('snapshot');
 599
 600         if ($val) {
 601                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 602         }
 603
 604         return @fmts;
 605 }
 606
 607 sub feature_patches {
 608         my @val = (git_get_project_config('patches', '--int'));
 609
 610         if (@val) {
 611                 return @val;
 612         }
 613
 614         return ($_[0]);
 615 }
 616
 617 sub feature_avatar {
 618         my @val = (git_get_project_config('avatar'));
 619
 620         return @val ? @val : @_;
 621 }
 622
 623 # checking HEAD file with -e is fragile if the repository was
 624 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 625 # and then pruned.
 626 sub check_head_link {
 627         my ($dir) = @_;
 628         my $headfile = "$dir/HEAD";
 629         return ((-e $headfile) ||
 630                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 631 }
 632
 633 sub check_export_ok {
 634         my ($dir) = @_;
 635         return (check_head_link($dir) &&
 636                 (!$export_ok || -e "$dir/$export_ok") &&
 637                 (!$export_auth_hook || $export_auth_hook->($dir)));
 638 }
 639
 640 # process alternate names for backward compatibility
 641 # filter out unsupported (unknown) snapshot formats
 642 sub filter_snapshot_fmts {
 643         my @fmts = @_;
 644
 645         @fmts = map {
 646                 exists $known_snapshot_format_aliases{$_} ?
 647                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 648         @fmts = grep {
 649                 exists $known_snapshot_formats{$_} &&
 650                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 651 }
 652
 653 # If it is set to code reference, it is code that it is to be run once per
 654 # request, allowing updating configurations that change with each request,
 655 # while running other code in config file only once.
 656 #
 657 # Otherwise, if it is false then gitweb would process config file only once;
 658 # if it is true then gitweb config would be run for each request.
 659 our $per_request_config = 1;
 660
 661 # read and parse gitweb config file given by its parameter.
 662 # returns true on success, false on recoverable error, allowing
 663 # to chain this subroutine, using first file that exists.
 664 # dies on errors during parsing config file, as it is unrecoverable.
 665 sub read_config_file {
 666         my $filename = shift;
 667         return unless defined $filename;
 668         # die if there are errors parsing config file
 669         if (-e $filename) {
 670                 do $filename;
 671                 die $@ if $@;
 672                 return 1;
 673         }
 674         return;
 675 }
 676
 677 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 678 sub evaluate_gitweb_config {
 679         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 680         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 681         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 682
 683         # Protect agains duplications of file names, to not read config twice.
 684         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 685         # there possibility of duplication of filename there doesn't matter.
 686         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 687         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 688
 689         # Common system-wide settings for convenience.
 690         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 691         read_config_file($GITWEB_CONFIG_COMMON);
 692
 693         # Use first config file that exists.  This means use the per-instance
 694         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 695         read_config_file($GITWEB_CONFIG) and return;
 696         read_config_file($GITWEB_CONFIG_SYSTEM);
 697 }
 698
 699 # Get loadavg of system, to compare against $maxload.
 700 # Currently it requires '/proc/loadavg' present to get loadavg;
 701 # if it is not present it returns 0, which means no load checking.
 702 sub get_loadavg {
 703         if( -e '/proc/loadavg' ){
 704                 open my $fd, '<', '/proc/loadavg'
 705                         or return 0;
 706                 my @load = split(/\s+/, scalar <$fd>);
 707                 close $fd;
 708
 709                 # The first three columns measure CPU and IO utilization of the last one,
 710                 # five, and 10 minute periods.  The fourth column shows the number of
 711                 # currently running processes and the total number of processes in the m/n
 712                 # format.  The last column displays the last process ID used.
 713                 return $load[0] || 0;
 714         }
 715         # additional checks for load average should go here for things that don't export
 716         # /proc/loadavg
 717
 718         return 0;
 719 }
 720
 721 # version of the core git binary
 722 our $git_version;
 723 sub evaluate_git_version {
 724         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 725         $number_of_git_cmds++;
 726 }
 727
 728 sub check_loadavg {
 729         if (defined $maxload && get_loadavg() > $maxload) {
 730                 die_error(503, "The load average on the server is too high");
 731         }
 732 }
 733
 734 # ======================================================================
 735 # input validation and dispatch
 736
 737 # input parameters can be collected from a variety of sources (presently, CGI
 738 # and PATH_INFO), so we define an %input_params hash that collects them all
 739 # together during validation: this allows subsequent uses (e.g. href()) to be
 740 # agnostic of the parameter origin
 741
 742 our %input_params = ();
 743
 744 # input parameters are stored with the long parameter name as key. This will
 745 # also be used in the href subroutine to convert parameters to their CGI
 746 # equivalent, and since the href() usage is the most frequent one, we store
 747 # the name -> CGI key mapping here, instead of the reverse.
 748 #
 749 # XXX: Warning: If you touch this, check the search form for updating,
 750 # too.
 751
 752 our @cgi_param_mapping = (
 753         project => "p",
 754         action => "a",
 755         file_name => "f",
 756         file_parent => "fp",
 757         hash => "h",
 758         hash_parent => "hp",
 759         hash_base => "hb",
 760         hash_parent_base => "hpb",
 761         page => "pg",
 762         order => "o",
 763         searchtext => "s",
 764         searchtype => "st",
 765         snapshot_format => "sf",
 766         extra_options => "opt",
 767         search_use_regexp => "sr",
 768         ctag => "by_tag",
 769         diff_style => "ds",
 770         project_filter => "pf",
 771         # this must be last entry (for manipulation from JavaScript)
 772         javascript => "js"
 773 );
 774 our %cgi_param_mapping = @cgi_param_mapping;
 775
 776 # we will also need to know the possible actions, for validation
 777 our %actions = (
 778         "blame" => \&git_blame,
 779         "blame_incremental" => \&git_blame_incremental,
 780         "blame_data" => \&git_blame_data,
 781         "blobdiff" => \&git_blobdiff,
 782         "blobdiff_plain" => \&git_blobdiff_plain,
 783         "blob" => \&git_blob,
 784         "blob_plain" => \&git_blob_plain,
 785         "commitdiff" => \&git_commitdiff,
 786         "commitdiff_plain" => \&git_commitdiff_plain,
 787         "commit" => \&git_commit,
 788         "forks" => \&git_forks,
 789         "heads" => \&git_heads,
 790         "history" => \&git_history,
 791         "log" => \&git_log,
 792         "patch" => \&git_patch,
 793         "patches" => \&git_patches,
 794         "remotes" => \&git_remotes,
 795         "rss" => \&git_rss,
 796         "atom" => \&git_atom,
 797         "search" => \&git_search,
 798         "search_help" => \&git_search_help,
 799         "shortlog" => \&git_shortlog,
 800         "summary" => \&git_summary,
 801         "tag" => \&git_tag,
 802         "tags" => \&git_tags,
 803         "tree" => \&git_tree,
 804         "snapshot" => \&git_snapshot,
 805         "object" => \&git_object,
 806         # those below don't need $project
 807         "opml" => \&git_opml,
 808         "project_list" => \&git_project_list,
 809         "project_index" => \&git_project_index,
 810 );
 811
 812 # finally, we have the hash of allowed extra_options for the commands that
 813 # allow them
 814 our %allowed_options = (
 815         "--no-merges" => [ qw(rss atom log shortlog history) ],
 816 );
 817
 818 # fill %input_params with the CGI parameters. All values except for 'opt'
 819 # should be single values, but opt can be an array. We should probably
 820 # build an array of parameters that can be multi-valued, but since for the time
 821 # being it's only this one, we just single it out
 822 sub evaluate_query_params {
 823         our $cgi;
 824
 825         while (my ($name, $symbol) = each %cgi_param_mapping) {
 826                 if ($symbol eq 'opt') {
 827                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 828                 } else {
 829                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 830                 }
 831         }
 832 }
 833
 834 # now read PATH_INFO and update the parameter list for missing parameters
 835 sub evaluate_path_info {
 836         return if defined $input_params{'project'};
 837         return if !$path_info;
 838         $path_info =~ s,^/+,,;
 839         return if !$path_info;
 840
 841         # find which part of PATH_INFO is project
 842         my $project = $path_info;
 843         $project =~ s,/+$,,;
 844         while ($project && !check_head_link("$projectroot/$project")) {
 845                 $project =~ s,/*[^/]*$,,;
 846         }
 847         return unless $project;
 848         $input_params{'project'} = $project;
 849
 850         # do not change any parameters if an action is given using the query string
 851         return if $input_params{'action'};
 852         $path_info =~ s,^\Q$project\E/*,,;
 853
 854         # next, check if we have an action
 855         my $action = $path_info;
 856         $action =~ s,/.*$,,;
 857         if (exists $actions{$action}) {
 858                 $path_info =~ s,^$action/*,,;
 859                 $input_params{'action'} = $action;
 860         }
 861
 862         # list of actions that want hash_base instead of hash, but can have no
 863         # pathname (f) parameter
 864         my @wants_base = (
 865                 'tree',
 866                 'history',
 867         );
 868
 869         # we want to catch, among others
 870         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 871         my ($parentrefname, $parentpathname, $refname, $pathname) =
 872                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 873
 874         # first, analyze the 'current' part
 875         if (defined $pathname) {
 876                 # we got "branch:filename" or "branch:dir/"
 877                 # we could use git_get_type(branch:pathname), but:
 878                 # - it needs $git_dir
 879                 # - it does a git() call
 880                 # - the convention of terminating directories with a slash
 881                 #   makes it superfluous
 882                 # - embedding the action in the PATH_INFO would make it even
 883                 #   more superfluous
 884                 $pathname =~ s,^/+,,;
 885                 if (!$pathname || substr($pathname, -1) eq "/") {
 886                         $input_params{'action'} ||= "tree";
 887                         $pathname =~ s,/$,,;
 888                 } else {
 889                         # the default action depends on whether we had parent info
 890                         # or not
 891                         if ($parentrefname) {
 892                                 $input_params{'action'} ||= "blobdiff_plain";
 893                         } else {
 894                                 $input_params{'action'} ||= "blob_plain";
 895                         }
 896                 }
 897                 $input_params{'hash_base'} ||= $refname;
 898                 $input_params{'file_name'} ||= $pathname;
 899         } elsif (defined $refname) {
 900                 # we got "branch". In this case we have to choose if we have to
 901                 # set hash or hash_base.
 902                 #
 903                 # Most of the actions without a pathname only want hash to be
 904                 # set, except for the ones specified in @wants_base that want
 905                 # hash_base instead. It should also be noted that hand-crafted
 906                 # links having 'history' as an action and no pathname or hash
 907                 # set will fail, but that happens regardless of PATH_INFO.
 908                 if (defined $parentrefname) {
 909                         # if there is parent let the default be 'shortlog' action
 910                         # (for http://git.example.com/repo.git/A..B links); if there
 911                         # is no parent, dispatch will detect type of object and set
 912                         # action appropriately if required (if action is not set)
 913                         $input_params{'action'} ||= "shortlog";
 914                 }
 915                 if ($input_params{'action'} &&
 916                     grep { $_ eq $input_params{'action'} } @wants_base) {
 917                         $input_params{'hash_base'} ||= $refname;
 918                 } else {
 919                         $input_params{'hash'} ||= $refname;
 920                 }
 921         }
 922
 923         # next, handle the 'parent' part, if present
 924         if (defined $parentrefname) {
 925                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 926                 # someproject/blobdiff/oldrev..newrev:/filename
 927                 if ($parentpathname) {
 928                         $parentpathname =~ s,^/+,,;
 929                         $parentpathname =~ s,/$,,;
 930                         $input_params{'file_parent'} ||= $parentpathname;
 931                 } else {
 932                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 933                 }
 934                 # we assume that hash_parent_base is wanted if a path was specified,
 935                 # or if the action wants hash_base instead of hash
 936                 if (defined $input_params{'file_parent'} ||
 937                         grep { $_ eq $input_params{'action'} } @wants_base) {
 938                         $input_params{'hash_parent_base'} ||= $parentrefname;
 939                 } else {
 940                         $input_params{'hash_parent'} ||= $parentrefname;
 941                 }
 942         }
 943
 944         # for the snapshot action, we allow URLs in the form
 945         # $project/snapshot/$hash.ext
 946         # where .ext determines the snapshot and gets removed from the
 947         # passed $refname to provide the $hash.
 948         #
 949         # To be able to tell that $refname includes the format extension, we
 950         # require the following two conditions to be satisfied:
 951         # - the hash input parameter MUST have been set from the $refname part
 952         #   of the URL (i.e. they must be equal)
 953         # - the snapshot format MUST NOT have been defined already (e.g. from
 954         #   CGI parameter sf)
 955         # It's also useless to try any matching unless $refname has a dot,
 956         # so we check for that too
 957         if (defined $input_params{'action'} &&
 958                 $input_params{'action'} eq 'snapshot' &&
 959                 defined $refname && index($refname, '.') != -1 &&
 960                 $refname eq $input_params{'hash'} &&
 961                 !defined $input_params{'snapshot_format'}) {
 962                 # We loop over the known snapshot formats, checking for
 963                 # extensions. Allowed extensions are both the defined suffix
 964                 # (which includes the initial dot already) and the snapshot
 965                 # format key itself, with a prepended dot
 966                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 967                         my $hash = $refname;
 968                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 969                                 next;
 970                         }
 971                         my $sfx = $1;
 972                         # a valid suffix was found, so set the snapshot format
 973                         # and reset the hash parameter
 974                         $input_params{'snapshot_format'} = $fmt;
 975                         $input_params{'hash'} = $hash;
 976                         # we also set the format suffix to the one requested
 977                         # in the URL: this way a request for e.g. .tgz returns
 978                         # a .tgz instead of a .tar.gz
 979                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 980                         last;
 981                 }
 982         }
 983 }
 984
 985 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 986      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 987      $searchtext, $search_regexp, $project_filter);
 988 sub evaluate_and_validate_params {
 989         our $action = $input_params{'action'};
 990         if (defined $action) {
 991                 if (!validate_action($action)) {
 992                         die_error(400, "Invalid action parameter");
 993                 }
 994         }
 995
 996         # parameters which are pathnames
 997         our $project = $input_params{'project'};
 998         if (defined $project) {
 999                 if (!validate_project($project)) {
1000                         undef $project;
1001                         die_error(404, "No such project");
1002                 }
1003         }
1004
1005         our $project_filter = $input_params{'project_filter'};
1006         if (defined $project_filter) {
1007                 if (!validate_pathname($project_filter)) {
1008                         die_error(404, "Invalid project_filter parameter");
1009                 }
1010         }
1011
1012         our $file_name = $input_params{'file_name'};
1013         if (defined $file_name) {
1014                 if (!validate_pathname($file_name)) {
1015                         die_error(400, "Invalid file parameter");
1016                 }
1017         }
1018
1019         our $file_parent = $input_params{'file_parent'};
1020         if (defined $file_parent) {
1021                 if (!validate_pathname($file_parent)) {
1022                         die_error(400, "Invalid file parent parameter");
1023                 }
1024         }
1025
1026         # parameters which are refnames
1027         our $hash = $input_params{'hash'};
1028         if (defined $hash) {
1029                 if (!validate_refname($hash)) {
1030                         die_error(400, "Invalid hash parameter");
1031                 }
1032         }
1033
1034         our $hash_parent = $input_params{'hash_parent'};
1035         if (defined $hash_parent) {
1036                 if (!validate_refname($hash_parent)) {
1037                         die_error(400, "Invalid hash parent parameter");
1038                 }
1039         }
1040
1041         our $hash_base = $input_params{'hash_base'};
1042         if (defined $hash_base) {
1043                 if (!validate_refname($hash_base)) {
1044                         die_error(400, "Invalid hash base parameter");
1045                 }
1046         }
1047
1048         our @extra_options = @{$input_params{'extra_options'}};
1049         # @extra_options is always defined, since it can only be (currently) set from
1050         # CGI, and $cgi->param() returns the empty array in array context if the param
1051         # is not set
1052         foreach my $opt (@extra_options) {
1053                 if (not exists $allowed_options{$opt}) {
1054                         die_error(400, "Invalid option parameter");
1055                 }
1056                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1057                         die_error(400, "Invalid option parameter for this action");
1058                 }
1059         }
1060
1061         our $hash_parent_base = $input_params{'hash_parent_base'};
1062         if (defined $hash_parent_base) {
1063                 if (!validate_refname($hash_parent_base)) {
1064                         die_error(400, "Invalid hash parent base parameter");
1065                 }
1066         }
1067
1068         # other parameters
1069         our $page = $input_params{'page'};
1070         if (defined $page) {
1071                 if ($page =~ m/[^0-9]/) {
1072                         die_error(400, "Invalid page parameter");
1073                 }
1074         }
1075
1076         our $searchtype = $input_params{'searchtype'};
1077         if (defined $searchtype) {
1078                 if ($searchtype =~ m/[^a-z]/) {
1079                         die_error(400, "Invalid searchtype parameter");
1080                 }
1081         }
1082
1083         our $search_use_regexp = $input_params{'search_use_regexp'};
1084
1085         our $searchtext = $input_params{'searchtext'};
1086         our $search_regexp;
1087         if (defined $searchtext) {
1088                 if (length($searchtext) < 2) {
1089                         die_error(403, "At least two characters are required for search parameter");
1090                 }
1091                 if ($search_use_regexp) {
1092                         $search_regexp = $searchtext;
1093                         if (!eval { qr/$search_regexp/; 1; }) {
1094                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1095                                 die_error(400, "Invalid search regexp '$search_regexp'",
1096                                           esc_html($error));
1097                         }
1098                 } else {
1099                         $search_regexp = quotemeta $searchtext;
1100                 }
1101         }
1102 }
1103
1104 # path to the current git repository
1105 our $git_dir;
1106 sub evaluate_git_dir {
1107         our $git_dir = "$projectroot/$project" if $project;
1108 }
1109
1110 our (@snapshot_fmts, $git_avatar);
1111 sub configure_gitweb_features {
1112         # list of supported snapshot formats
1113         our @snapshot_fmts = gitweb_get_feature('snapshot');
1114         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1115
1116         # check that the avatar feature is set to a known provider name,
1117         # and for each provider check if the dependencies are satisfied.
1118         # if the provider name is invalid or the dependencies are not met,
1119         # reset $git_avatar to the empty string.
1120         our ($git_avatar) = gitweb_get_feature('avatar');
1121         if ($git_avatar eq 'gravatar') {
1122                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1123         } elsif ($git_avatar eq 'picon') {
1124                 # no dependencies
1125         } else {
1126                 $git_avatar = '';
1127         }
1128 }
1129
1130 # custom error handler: 'die <message>' is Internal Server Error
1131 sub handle_errors_html {
1132         my $msg = shift; # it is already HTML escaped
1133
1134         # to avoid infinite loop where error occurs in die_error,
1135         # change handler to default handler, disabling handle_errors_html
1136         set_message("Error occured when inside die_error:\n$msg");
1137
1138         # you cannot jump out of die_error when called as error handler;
1139         # the subroutine set via CGI::Carp::set_message is called _after_
1140         # HTTP headers are already written, so it cannot write them itself
1141         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1142 }
1143 set_message(\&handle_errors_html);
1144
1145 # dispatch
1146 sub dispatch {
1147         if (!defined $action) {
1148                 if (defined $hash) {
1149                         $action = git_get_type($hash);
1150                         $action or die_error(404, "Object does not exist");
1151                 } elsif (defined $hash_base && defined $file_name) {
1152                         $action = git_get_type("$hash_base:$file_name");
1153                         $action or die_error(404, "File or directory does not exist");
1154                 } elsif (defined $project) {
1155                         $action = 'summary';
1156                 } else {
1157                         $action = 'project_list';
1158                 }
1159         }
1160         if (!defined($actions{$action})) {
1161                 die_error(400, "Unknown action");
1162         }
1163         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1164             !$project) {
1165                 die_error(400, "Project needed");
1166         }
1167         $actions{$action}->();
1168 }
1169
1170 sub reset_timer {
1171         our $t0 = [ gettimeofday() ]
1172                 if defined $t0;
1173         our $number_of_git_cmds = 0;
1174 }
1175
1176 our $first_request = 1;
1177 sub run_request {
1178         reset_timer();
1179
1180         evaluate_uri();
1181         if ($first_request) {
1182                 evaluate_gitweb_config();
1183                 evaluate_git_version();
1184         }
1185         if ($per_request_config) {
1186                 if (ref($per_request_config) eq 'CODE') {
1187                         $per_request_config->();
1188                 } elsif (!$first_request) {
1189                         evaluate_gitweb_config();
1190                 }
1191         }
1192         check_loadavg();
1193
1194         # $projectroot and $projects_list might be set in gitweb config file
1195         $projects_list ||= $projectroot;
1196
1197         evaluate_query_params();
1198         evaluate_path_info();
1199         evaluate_and_validate_params();
1200         evaluate_git_dir();
1201
1202         configure_gitweb_features();
1203
1204         dispatch();
1205 }
1206
1207 our $is_last_request = sub { 1 };
1208 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1209 our $CGI = 'CGI';
1210 our $cgi;
1211 sub configure_as_fcgi {
1212         require CGI::Fast;
1213         our $CGI = 'CGI::Fast';
1214
1215         my $request_number = 0;
1216         # let each child service 100 requests
1217         our $is_last_request = sub { ++$request_number > 100 };
1218 }
1219 sub evaluate_argv {
1220         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1221         configure_as_fcgi()
1222                 if $script_name =~ /\.fcgi$/;
1223
1224         return unless (@ARGV);
1225
1226         require Getopt::Long;
1227         Getopt::Long::GetOptions(
1228                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1229                 'nproc|n=i' => sub {
1230                         my ($arg, $val) = @_;
1231                         return unless eval { require FCGI::ProcManager; 1; };
1232                         my $proc_manager = FCGI::ProcManager->new({
1233                                 n_processes => $val,
1234                         });
1235                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1236                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1237                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1238                 },
1239         );
1240 }
1241
1242 sub run {
1243         evaluate_argv();
1244
1245         $first_request = 1;
1246         $pre_listen_hook->()
1247                 if $pre_listen_hook;
1248
1249  REQUEST:
1250         while ($cgi = $CGI->new()) {
1251                 $pre_dispatch_hook->()
1252                         if $pre_dispatch_hook;
1253
1254                 run_request();
1255
1256                 $post_dispatch_hook->()
1257                         if $post_dispatch_hook;
1258                 $first_request = 0;
1259
1260                 last REQUEST if ($is_last_request->());
1261         }
1262
1263  DONE_GITWEB:
1264         1;
1265 }
1266
1267 run();
1268
1269 if (defined caller) {
1270         # wrapped in a subroutine processing requests,
1271         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1272         return;
1273 } else {
1274         # pure CGI script, serving single request
1275         exit;
1276 }
1277
1278 ## ======================================================================
1279 ## action links
1280
1281 # possible values of extra options
1282 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1283 # -replay => 1      - start from a current view (replay with modifications)
1284 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1285 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1286 sub href {
1287         my %params = @_;
1288         # default is to use -absolute url() i.e. $my_uri
1289         my $href = $params{-full} ? $my_url : $my_uri;
1290
1291         # implicit -replay, must be first of implicit params
1292         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1293
1294         $params{'project'} = $project unless exists $params{'project'};
1295
1296         if ($params{-replay}) {
1297                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1298                         if (!exists $params{$name}) {
1299                                 $params{$name} = $input_params{$name};
1300                         }
1301                 }
1302         }
1303
1304         my $use_pathinfo = gitweb_check_feature('pathinfo');
1305         if (defined $params{'project'} &&
1306             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1307                 # try to put as many parameters as possible in PATH_INFO:
1308                 #   - project name
1309                 #   - action
1310                 #   - hash_parent or hash_parent_base:/file_parent
1311                 #   - hash or hash_base:/filename
1312                 #   - the snapshot_format as an appropriate suffix
1313
1314                 # When the script is the root DirectoryIndex for the domain,
1315                 # $href here would be something like http://gitweb.example.com/
1316                 # Thus, we strip any trailing / from $href, to spare us double
1317                 # slashes in the final URL
1318                 $href =~ s,/$,,;
1319
1320                 # Then add the project name, if present
1321                 $href .= "/".esc_path_info($params{'project'});
1322                 delete $params{'project'};
1323
1324                 # since we destructively absorb parameters, we keep this
1325                 # boolean that remembers if we're handling a snapshot
1326                 my $is_snapshot = $params{'action'} eq 'snapshot';
1327
1328                 # Summary just uses the project path URL, any other action is
1329                 # added to the URL
1330                 if (defined $params{'action'}) {
1331                         $href .= "/".esc_path_info($params{'action'})
1332                                 unless $params{'action'} eq 'summary';
1333                         delete $params{'action'};
1334                 }
1335
1336                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1337                 # stripping nonexistent or useless pieces
1338                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1339                         || $params{'hash_parent'} || $params{'hash'});
1340                 if (defined $params{'hash_base'}) {
1341                         if (defined $params{'hash_parent_base'}) {
1342                                 $href .= esc_path_info($params{'hash_parent_base'});
1343                                 # skip the file_parent if it's the same as the file_name
1344                                 if (defined $params{'file_parent'}) {
1345                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1346                                                 delete $params{'file_parent'};
1347                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1348                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1349                                                 delete $params{'file_parent'};
1350                                         }
1351                                 }
1352                                 $href .= "..";
1353                                 delete $params{'hash_parent'};
1354                                 delete $params{'hash_parent_base'};
1355                         } elsif (defined $params{'hash_parent'}) {
1356                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1357                                 delete $params{'hash_parent'};
1358                         }
1359
1360                         $href .= esc_path_info($params{'hash_base'});
1361                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1362                                 $href .= ":/".esc_path_info($params{'file_name'});
1363                                 delete $params{'file_name'};
1364                         }
1365                         delete $params{'hash'};
1366                         delete $params{'hash_base'};
1367                 } elsif (defined $params{'hash'}) {
1368                         $href .= esc_path_info($params{'hash'});
1369                         delete $params{'hash'};
1370                 }
1371
1372                 # If the action was a snapshot, we can absorb the
1373                 # snapshot_format parameter too
1374                 if ($is_snapshot) {
1375                         my $fmt = $params{'snapshot_format'};
1376                         # snapshot_format should always be defined when href()
1377                         # is called, but just in case some code forgets, we
1378                         # fall back to the default
1379                         $fmt ||= $snapshot_fmts[0];
1380                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1381                         delete $params{'snapshot_format'};
1382                 }
1383         }
1384
1385         # now encode the parameters explicitly
1386         my @result = ();
1387         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1388                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1389                 if (defined $params{$name}) {
1390                         if (ref($params{$name}) eq "ARRAY") {
1391                                 foreach my $par (@{$params{$name}}) {
1392                                         push @result, $symbol . "=" . esc_param($par);
1393                                 }
1394                         } else {
1395                                 push @result, $symbol . "=" . esc_param($params{$name});
1396                         }
1397                 }
1398         }
1399         $href .= "?" . join(';', @result) if scalar @result;
1400
1401         # final transformation: trailing spaces must be escaped (URI-encoded)
1402         $href =~ s/(\s+)$/CGI::escape($1)/e;
1403
1404         if ($params{-anchor}) {
1405                 $href .= "#".esc_param($params{-anchor});
1406         }
1407
1408         return $href;
1409 }
1410
1411
1412 ## ======================================================================
1413 ## validation, quoting/unquoting and escaping
1414
1415 sub validate_action {
1416         my $input = shift || return undef;
1417         return undef unless exists $actions{$input};
1418         return $input;
1419 }
1420
1421 sub validate_project {
1422         my $input = shift || return undef;
1423         if (!validate_pathname($input) ||
1424                 !(-d "$projectroot/$input") ||
1425                 !check_export_ok("$projectroot/$input") ||
1426                 ($strict_export && !project_in_list($input))) {
1427                 return undef;
1428         } else {
1429                 return $input;
1430         }
1431 }
1432
1433 sub validate_pathname {
1434         my $input = shift || return undef;
1435
1436         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1437         # at the beginning, at the end, and between slashes.
1438         # also this catches doubled slashes
1439         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1440                 return undef;
1441         }
1442         # no null characters
1443         if ($input =~ m!\0!) {
1444                 return undef;
1445         }
1446         return $input;
1447 }
1448
1449 sub validate_refname {
1450         my $input = shift || return undef;
1451
1452         # textual hashes are O.K.
1453         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1454                 return $input;
1455         }
1456         # it must be correct pathname
1457         $input = validate_pathname($input)
1458                 or return undef;
1459         # restrictions on ref name according to git-check-ref-format
1460         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1461                 return undef;
1462         }
1463         return $input;
1464 }
1465
1466 # decode sequences of octets in utf8 into Perl's internal form,
1467 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1468 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1469 sub to_utf8 {
1470         my $str = shift;
1471         return undef unless defined $str;
1472
1473         if (utf8::is_utf8($str) || utf8::decode($str)) {
1474                 return $str;
1475         } else {
1476                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1477         }
1478 }
1479
1480 # quote unsafe chars, but keep the slash, even when it's not
1481 # correct, but quoted slashes look too horrible in bookmarks
1482 sub esc_param {
1483         my $str = shift;
1484         return undef unless defined $str;
1485         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1486         $str =~ s/ /\+/g;
1487         return $str;
1488 }
1489
1490 # the quoting rules for path_info fragment are slightly different
1491 sub esc_path_info {
1492         my $str = shift;
1493         return undef unless defined $str;
1494
1495         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1496         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1497
1498         return $str;
1499 }
1500
1501 # quote unsafe chars in whole URL, so some characters cannot be quoted
1502 sub esc_url {
1503         my $str = shift;
1504         return undef unless defined $str;
1505         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1506         $str =~ s/ /\+/g;
1507         return $str;
1508 }
1509
1510 # quote unsafe characters in HTML attributes
1511 sub esc_attr {
1512
1513         # for XHTML conformance escaping '"' to '&quot;' is not enough
1514         return esc_html(@_);
1515 }
1516
1517 # replace invalid utf8 character with SUBSTITUTION sequence
1518 sub esc_html {
1519         my $str = shift;
1520         my %opts = @_;
1521
1522         return undef unless defined $str;
1523
1524         $str = to_utf8($str);
1525         $str = $cgi->escapeHTML($str);
1526         if ($opts{'-nbsp'}) {
1527                 $str =~ s/ /&nbsp;/g;
1528         }
1529         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1530         return $str;
1531 }
1532
1533 # quote control characters and escape filename to HTML
1534 sub esc_path {
1535         my $str = shift;
1536         my %opts = @_;
1537
1538         return undef unless defined $str;
1539
1540         $str = to_utf8($str);
1541         $str = $cgi->escapeHTML($str);
1542         if ($opts{'-nbsp'}) {
1543                 $str =~ s/ /&nbsp;/g;
1544         }
1545         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1546         return $str;
1547 }
1548
1549 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1550 sub sanitize {
1551         my $str = shift;
1552
1553         return undef unless defined $str;
1554
1555         $str = to_utf8($str);
1556         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1557         return $str;
1558 }
1559
1560 # Make control characters "printable", using character escape codes (CEC)
1561 sub quot_cec {
1562         my $cntrl = shift;
1563         my %opts = @_;
1564         my %es = ( # character escape codes, aka escape sequences
1565                 "\t" => '\t',   # tab            (HT)
1566                 "\n" => '\n',   # line feed      (LF)
1567                 "\r" => '\r',   # carrige return (CR)
1568                 "\f" => '\f',   # form feed      (FF)
1569                 "\b" => '\b',   # backspace      (BS)
1570                 "\a" => '\a',   # alarm (bell)   (BEL)
1571                 "\e" => '\e',   # escape         (ESC)
1572                 "\013" => '\v', # vertical tab   (VT)
1573                 "\000" => '\0', # nul character  (NUL)
1574         );
1575         my $chr = ( (exists $es{$cntrl})
1576                     ? $es{$cntrl}
1577                     : sprintf('\%2x', ord($cntrl)) );
1578         if ($opts{-nohtml}) {
1579                 return $chr;
1580         } else {
1581                 return "<span class=\"cntrl\">$chr</span>";
1582         }
1583 }
1584
1585 # Alternatively use unicode control pictures codepoints,
1586 # Unicode "printable representation" (PR)
1587 sub quot_upr {
1588         my $cntrl = shift;
1589         my %opts = @_;
1590
1591         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1592         if ($opts{-nohtml}) {
1593                 return $chr;
1594         } else {
1595                 return "<span class=\"cntrl\">$chr</span>";
1596         }
1597 }
1598
1599 # git may return quoted and escaped filenames
1600 sub unquote {
1601         my $str = shift;
1602
1603         sub unq {
1604                 my $seq = shift;
1605                 my %es = ( # character escape codes, aka escape sequences
1606                         't' => "\t",   # tab            (HT, TAB)
1607                         'n' => "\n",   # newline        (NL)
1608                         'r' => "\r",   # return         (CR)
1609                         'f' => "\f",   # form feed      (FF)
1610                         'b' => "\b",   # backspace      (BS)
1611                         'a' => "\a",   # alarm (bell)   (BEL)
1612                         'e' => "\e",   # escape         (ESC)
1613                         'v' => "\013", # vertical tab   (VT)
1614                 );
1615
1616                 if ($seq =~ m/^[0-7]{1,3}$/) {
1617                         # octal char sequence
1618                         return chr(oct($seq));
1619                 } elsif (exists $es{$seq}) {
1620                         # C escape sequence, aka character escape code
1621                         return $es{$seq};
1622                 }
1623                 # quoted ordinary character
1624                 return $seq;
1625         }
1626
1627         if ($str =~ m/^"(.*)"$/) {
1628                 # needs unquoting
1629                 $str = $1;
1630                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1631         }
1632         return $str;
1633 }
1634
1635 # escape tabs (convert tabs to spaces)
1636 sub untabify {
1637         my $line = shift;
1638
1639         while ((my $pos = index($line, "\t")) != -1) {
1640                 if (my $count = (8 - ($pos % 8))) {
1641                         my $spaces = ' ' x $count;
1642                         $line =~ s/\t/$spaces/;
1643                 }
1644         }
1645
1646         return $line;
1647 }
1648
1649 sub project_in_list {
1650         my $project = shift;
1651         my @list = git_get_projects_list();
1652         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1653 }
1654
1655 ## ----------------------------------------------------------------------
1656 ## HTML aware string manipulation
1657
1658 # Try to chop given string on a word boundary between position
1659 # $len and $len+$add_len. If there is no word boundary there,
1660 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1661 # (marking chopped part) would be longer than given string.
1662 sub chop_str {
1663         my $str = shift;
1664         my $len = shift;
1665         my $add_len = shift || 10;
1666         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1667
1668         # Make sure perl knows it is utf8 encoded so we don't
1669         # cut in the middle of a utf8 multibyte char.
1670         $str = to_utf8($str);
1671
1672         # allow only $len chars, but don't cut a word if it would fit in $add_len
1673         # if it doesn't fit, cut it if it's still longer than the dots we would add
1674         # remove chopped character entities entirely
1675
1676         # when chopping in the middle, distribute $len into left and right part
1677         # return early if chopping wouldn't make string shorter
1678         if ($where eq 'center') {
1679                 return $str if ($len + 5 >= length($str)); # filler is length 5
1680                 $len = int($len/2);
1681         } else {
1682                 return $str if ($len + 4 >= length($str)); # filler is length 4
1683         }
1684
1685         # regexps: ending and beginning with word part up to $add_len
1686         my $endre = qr/.{$len}\w{0,$add_len}/;
1687         my $begre = qr/\w{0,$add_len}.{$len}/;
1688
1689         if ($where eq 'left') {
1690                 $str =~ m/^(.*?)($begre)$/;
1691                 my ($lead, $body) = ($1, $2);
1692                 if (length($lead) > 4) {
1693                         $lead = " ...";
1694                 }
1695                 return "$lead$body";
1696
1697         } elsif ($where eq 'center') {
1698                 $str =~ m/^($endre)(.*)$/;
1699                 my ($left, $str)  = ($1, $2);
1700                 $str =~ m/^(.*?)($begre)$/;
1701                 my ($mid, $right) = ($1, $2);
1702                 if (length($mid) > 5) {
1703                         $mid = " ... ";
1704                 }
1705                 return "$left$mid$right";
1706
1707         } else {
1708                 $str =~ m/^($endre)(.*)$/;
1709                 my $body = $1;
1710                 my $tail = $2;
1711                 if (length($tail) > 4) {
1712                         $tail = "... ";
1713                 }
1714                 return "$body$tail";
1715         }
1716 }
1717
1718 # takes the same arguments as chop_str, but also wraps a <span> around the
1719 # result with a title attribute if it does get chopped. Additionally, the
1720 # string is HTML-escaped.
1721 sub chop_and_escape_str {
1722         my ($str) = @_;
1723
1724         my $chopped = chop_str(@_);
1725         $str = to_utf8($str);
1726         if ($chopped eq $str) {
1727                 return esc_html($chopped);
1728         } else {
1729                 $str =~ s/[[:cntrl:]]/?/g;
1730                 return $cgi->span({-title=>$str}, esc_html($chopped));
1731         }
1732 }
1733
1734 # Highlight selected fragments of string, using given CSS class,
1735 # and escape HTML.  It is assumed that fragments do not overlap.
1736 # Regions are passed as list of pairs (array references).
1737 #
1738 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1739 # '<span class="mark">foo</span>bar'
1740 sub esc_html_hl_regions {
1741         my ($str, $css_class, @sel) = @_;
1742         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1743         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1744         return esc_html($str, %opts) unless @sel;
1745
1746         my $out = '';
1747         my $pos = 0;
1748
1749         for my $s (@sel) {
1750                 my ($begin, $end) = @$s;
1751
1752                 # Don't create empty <span> elements.
1753                 next if $end <= $begin;
1754
1755                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1756                                        %opts);
1757
1758                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1759                         if ($begin - $pos > 0);
1760                 $out .= $cgi->span({-class => $css_class}, $escaped);
1761
1762                 $pos = $end;
1763         }
1764         $out .= esc_html(substr($str, $pos), %opts)
1765                 if ($pos < length($str));
1766
1767         return $out;
1768 }
1769
1770 # return positions of beginning and end of each match
1771 sub matchpos_list {
1772         my ($str, $regexp) = @_;
1773         return unless (defined $str && defined $regexp);
1774
1775         my @matches;
1776         while ($str =~ /$regexp/g) {
1777                 push @matches, [$-[0], $+[0]];
1778         }
1779         return @matches;
1780 }
1781
1782 # highlight match (if any), and escape HTML
1783 sub esc_html_match_hl {
1784         my ($str, $regexp) = @_;
1785         return esc_html($str) unless defined $regexp;
1786
1787         my @matches = matchpos_list($str, $regexp);
1788         return esc_html($str) unless @matches;
1789
1790         return esc_html_hl_regions($str, 'match', @matches);
1791 }
1792
1793
1794 # highlight match (if any) of shortened string, and escape HTML
1795 sub esc_html_match_hl_chopped {
1796         my ($str, $chopped, $regexp) = @_;
1797         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1798
1799         my @matches = matchpos_list($str, $regexp);
1800         return esc_html($chopped) unless @matches;
1801
1802         # filter matches so that we mark chopped string
1803         my $tail = "... "; # see chop_str
1804         unless ($chopped =~ s/\Q$tail\E$//) {
1805                 $tail = '';
1806         }
1807         my $chop_len = length($chopped);
1808         my $tail_len = length($tail);
1809         my @filtered;
1810
1811         for my $m (@matches) {
1812                 if ($m->[0] > $chop_len) {
1813                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1814                         last;
1815                 } elsif ($m->[1] > $chop_len) {
1816                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1817                         last;
1818                 }
1819                 push @filtered, $m;
1820         }
1821
1822         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1823 }
1824
1825 ## ----------------------------------------------------------------------
1826 ## functions returning short strings
1827
1828 # CSS class for given age value (in seconds)
1829 sub age_class {
1830         my $age = shift;
1831
1832         if (!defined $age) {
1833                 return "noage";
1834         } elsif ($age < 60*60*2) {
1835                 return "age0";
1836         } elsif ($age < 60*60*24*2) {
1837                 return "age1";
1838         } else {
1839                 return "age2";
1840         }
1841 }
1842
1843 # convert age in seconds to "nn units ago" string
1844 sub age_string {
1845         my $age = shift;
1846         my $age_str;
1847
1848         if ($age > 60*60*24*365*2) {
1849                 $age_str = (int $age/60/60/24/365);
1850                 $age_str .= " years ago";
1851         } elsif ($age > 60*60*24*(365/12)*2) {
1852                 $age_str = int $age/60/60/24/(365/12);
1853                 $age_str .= " months ago";
1854         } elsif ($age > 60*60*24*7*2) {
1855                 $age_str = int $age/60/60/24/7;
1856                 $age_str .= " weeks ago";
1857         } elsif ($age > 60*60*24*2) {
1858                 $age_str = int $age/60/60/24;
1859                 $age_str .= " days ago";
1860         } elsif ($age > 60*60*2) {
1861                 $age_str = int $age/60/60;
1862                 $age_str .= " hours ago";
1863         } elsif ($age > 60*2) {
1864                 $age_str = int $age/60;
1865                 $age_str .= " min ago";
1866         } elsif ($age > 2) {
1867                 $age_str = int $age;
1868                 $age_str .= " sec ago";
1869         } else {
1870                 $age_str .= " right now";
1871         }
1872         return $age_str;
1873 }
1874
1875 use constant {
1876         S_IFINVALID => 0030000,
1877         S_IFGITLINK => 0160000,
1878 };
1879
1880 # submodule/subproject, a commit object reference
1881 sub S_ISGITLINK {
1882         my $mode = shift;
1883
1884         return (($mode & S_IFMT) == S_IFGITLINK)
1885 }
1886
1887 # convert file mode in octal to symbolic file mode string
1888 sub mode_str {
1889         my $mode = oct shift;
1890
1891         if (S_ISGITLINK($mode)) {
1892                 return 'm---------';
1893         } elsif (S_ISDIR($mode & S_IFMT)) {
1894                 return 'drwxr-xr-x';
1895         } elsif (S_ISLNK($mode)) {
1896                 return 'lrwxrwxrwx';
1897         } elsif (S_ISREG($mode)) {
1898                 # git cares only about the executable bit
1899                 if ($mode & S_IXUSR) {
1900                         return '-rwxr-xr-x';
1901                 } else {
1902                         return '-rw-r--r--';
1903                 };
1904         } else {
1905                 return '----------';
1906         }
1907 }
1908
1909 # convert file mode in octal to file type string
1910 sub file_type {
1911         my $mode = shift;
1912
1913         if ($mode !~ m/^[0-7]+$/) {
1914                 return $mode;
1915         } else {
1916                 $mode = oct $mode;
1917         }
1918
1919         if (S_ISGITLINK($mode)) {
1920                 return "submodule";
1921         } elsif (S_ISDIR($mode & S_IFMT)) {
1922                 return "directory";
1923         } elsif (S_ISLNK($mode)) {
1924                 return "symlink";
1925         } elsif (S_ISREG($mode)) {
1926                 return "file";
1927         } else {
1928                 return "unknown";
1929         }
1930 }
1931
1932 # convert file mode in octal to file type description string
1933 sub file_type_long {
1934         my $mode = shift;
1935
1936         if ($mode !~ m/^[0-7]+$/) {
1937                 return $mode;
1938         } else {
1939                 $mode = oct $mode;
1940         }
1941
1942         if (S_ISGITLINK($mode)) {
1943                 return "submodule";
1944         } elsif (S_ISDIR($mode & S_IFMT)) {
1945                 return "directory";
1946         } elsif (S_ISLNK($mode)) {
1947                 return "symlink";
1948         } elsif (S_ISREG($mode)) {
1949                 if ($mode & S_IXUSR) {
1950                         return "executable";
1951                 } else {
1952                         return "file";
1953                 };
1954         } else {
1955                 return "unknown";
1956         }
1957 }
1958
1959
1960 ## ----------------------------------------------------------------------
1961 ## functions returning short HTML fragments, or transforming HTML fragments
1962 ## which don't belong to other sections
1963
1964 # format line of commit message.
1965 sub format_log_line_html {
1966         my $line = shift;
1967
1968         $line = esc_html($line, -nbsp=>1);
1969         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1970                 $cgi->a({-href => href(action=>"object", hash=>$1),
1971                                         -class => "text"}, $1);
1972         }eg;
1973
1974         return $line;
1975 }
1976
1977 # format marker of refs pointing to given object
1978
1979 # the destination action is chosen based on object type and current context:
1980 # - for annotated tags, we choose the tag view unless it's the current view
1981 #   already, in which case we go to shortlog view
1982 # - for other refs, we keep the current view if we're in history, shortlog or
1983 #   log view, and select shortlog otherwise
1984 sub format_ref_marker {
1985         my ($refs, $id) = @_;
1986         my $markers = '';
1987
1988         if (defined $refs->{$id}) {
1989                 foreach my $ref (@{$refs->{$id}}) {
1990                         # this code exploits the fact that non-lightweight tags are the
1991                         # only indirect objects, and that they are the only objects for which
1992                         # we want to use tag instead of shortlog as action
1993                         my ($type, $name) = qw();
1994                         my $indirect = ($ref =~ s/\^\{\}$//);
1995                         # e.g. tags/v2.6.11 or heads/next
1996                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1997                                 $type = $1;
1998                                 $name = $2;
1999                         } else {
2000                                 $type = "ref";
2001                                 $name = $ref;
2002                         }
2003
2004                         my $class = $type;
2005                         $class .= " indirect" if $indirect;
2006
2007                         my $dest_action = "shortlog";
2008
2009                         if ($indirect) {
2010                                 $dest_action = "tag" unless $action eq "tag";
2011                         } elsif ($action =~ /^(history|(short)?log)$/) {
2012                                 $dest_action = $action;
2013                         }
2014
2015                         my $dest = "";
2016                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2017                         $dest .= $ref;
2018
2019                         my $link = $cgi->a({
2020                                 -href => href(
2021                                         action=>$dest_action,
2022                                         hash=>$dest
2023                                 )}, $name);
2024
2025                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2026                                 $link . "</span>";
2027                 }
2028         }
2029
2030         if ($markers) {
2031                 return ' <span class="refs">'. $markers . '</span>';
2032         } else {
2033                 return "";
2034         }
2035 }
2036
2037 # format, perhaps shortened and with markers, title line
2038 sub format_subject_html {
2039         my ($long, $short, $href, $extra) = @_;
2040         $extra = '' unless defined($extra);
2041
2042         if (length($short) < length($long)) {
2043                 $long =~ s/[[:cntrl:]]/?/g;
2044                 return $cgi->a({-href => $href, -class => "list subject",
2045                                 -title => to_utf8($long)},
2046                        esc_html($short)) . $extra;
2047         } else {
2048                 return $cgi->a({-href => $href, -class => "list subject"},
2049                        esc_html($long)) . $extra;
2050         }
2051 }
2052
2053 # Rather than recomputing the url for an email multiple times, we cache it
2054 # after the first hit. This gives a visible benefit in views where the avatar
2055 # for the same email is used repeatedly (e.g. shortlog).
2056 # The cache is shared by all avatar engines (currently gravatar only), which
2057 # are free to use it as preferred. Since only one avatar engine is used for any
2058 # given page, there's no risk for cache conflicts.
2059 our %avatar_cache = ();
2060
2061 # Compute the picon url for a given email, by using the picon search service over at
2062 # http://www.cs.indiana.edu/picons/search.html
2063 sub picon_url {
2064         my $email = lc shift;
2065         if (!$avatar_cache{$email}) {
2066                 my ($user, $domain) = split('@', $email);
2067                 $avatar_cache{$email} =
2068                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2069                         "$domain/$user/" .
2070                         "users+domains+unknown/up/single";
2071         }
2072         return $avatar_cache{$email};
2073 }
2074
2075 # Compute the gravatar url for a given email, if it's not in the cache already.
2076 # Gravatar stores only the part of the URL before the size, since that's the
2077 # one computationally more expensive. This also allows reuse of the cache for
2078 # different sizes (for this particular engine).
2079 sub gravatar_url {
2080         my $email = lc shift;
2081         my $size = shift;
2082         $avatar_cache{$email} ||=
2083                 "http://www.gravatar.com/avatar/" .
2084                         Digest::MD5::md5_hex($email) . "?s=";
2085         return $avatar_cache{$email} . $size;
2086 }
2087
2088 # Insert an avatar for the given $email at the given $size if the feature
2089 # is enabled.
2090 sub git_get_avatar {
2091         my ($email, %opts) = @_;
2092         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2093         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2094         $opts{-size} ||= 'default';
2095         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2096         my $url = "";
2097         if ($git_avatar eq 'gravatar') {
2098                 $url = gravatar_url($email, $size);
2099         } elsif ($git_avatar eq 'picon') {
2100                 $url = picon_url($email);
2101         }
2102         # Other providers can be added by extending the if chain, defining $url
2103         # as needed. If no variant puts something in $url, we assume avatars
2104         # are completely disabled/unavailable.
2105         if ($url) {
2106                 return $pre_white .
2107                        "<img width=\"$size\" " .
2108                             "class=\"avatar\" " .
2109                             "src=\"".esc_url($url)."\" " .
2110                             "alt=\"\" " .
2111                        "/>" . $post_white;
2112         } else {
2113                 return "";
2114         }
2115 }
2116
2117 sub format_search_author {
2118         my ($author, $searchtype, $displaytext) = @_;
2119         my $have_search = gitweb_check_feature('search');
2120
2121         if ($have_search) {
2122                 my $performed = "";
2123                 if ($searchtype eq 'author') {
2124                         $performed = "authored";
2125                 } elsif ($searchtype eq 'committer') {
2126                         $performed = "committed";
2127                 }
2128
2129                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2130                                 searchtext=>$author,
2131                                 searchtype=>$searchtype), class=>"list",
2132                                 title=>"Search for commits $performed by $author"},
2133                                 $displaytext);
2134
2135         } else {
2136                 return $displaytext;
2137         }
2138 }
2139
2140 # format the author name of the given commit with the given tag
2141 # the author name is chopped and escaped according to the other
2142 # optional parameters (see chop_str).
2143 sub format_author_html {
2144         my $tag = shift;
2145         my $co = shift;
2146         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2147         return "<$tag class=\"author\">" .
2148                format_search_author($co->{'author_name'}, "author",
2149                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2150                        $author) .
2151                "</$tag>";
2152 }
2153
2154 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2155 sub format_git_diff_header_line {
2156         my $line = shift;
2157         my $diffinfo = shift;
2158         my ($from, $to) = @_;
2159
2160         if ($diffinfo->{'nparents'}) {
2161                 # combined diff
2162                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2163                 if ($to->{'href'}) {
2164                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2165                                          esc_path($to->{'file'}));
2166                 } else { # file was deleted (no href)
2167                         $line .= esc_path($to->{'file'});
2168                 }
2169         } else {
2170                 # "ordinary" diff
2171                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2172                 if ($from->{'href'}) {
2173                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2174                                          'a/' . esc_path($from->{'file'}));
2175                 } else { # file was added (no href)
2176                         $line .= 'a/' . esc_path($from->{'file'});
2177                 }
2178                 $line .= ' ';
2179                 if ($to->{'href'}) {
2180                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2181                                          'b/' . esc_path($to->{'file'}));
2182                 } else { # file was deleted
2183                         $line .= 'b/' . esc_path($to->{'file'});
2184                 }
2185         }
2186
2187         return "<div class=\"diff header\">$line</div>\n";
2188 }
2189
2190 # format extended diff header line, before patch itself
2191 sub format_extended_diff_header_line {
2192         my $line = shift;
2193         my $diffinfo = shift;
2194         my ($from, $to) = @_;
2195
2196         # match <path>
2197         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2198                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2199                                        esc_path($from->{'file'}));
2200         }
2201         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2202                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2203                                  esc_path($to->{'file'}));
2204         }
2205         # match single <mode>
2206         if ($line =~ m/\s(\d{6})$/) {
2207                 $line .= '<span class="info"> (' .
2208                          file_type_long($1) .
2209                          ')</span>';
2210         }
2211         # match <hash>
2212         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2213                 # can match only for combined diff
2214                 $line = 'index ';
2215                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2216                         if ($from->{'href'}[$i]) {
2217                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2218                                                   -class=>"hash"},
2219                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2220                         } else {
2221                                 $line .= '0' x 7;
2222                         }
2223                         # separator
2224                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2225                 }
2226                 $line .= '..';
2227                 if ($to->{'href'}) {
2228                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2229                                          substr($diffinfo->{'to_id'},0,7));
2230                 } else {
2231                         $line .= '0' x 7;
2232                 }
2233
2234         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2235                 # can match only for ordinary diff
2236                 my ($from_link, $to_link);
2237                 if ($from->{'href'}) {
2238                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2239                                              substr($diffinfo->{'from_id'},0,7));
2240                 } else {
2241                         $from_link = '0' x 7;
2242                 }
2243                 if ($to->{'href'}) {
2244                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2245                                            substr($diffinfo->{'to_id'},0,7));
2246                 } else {
2247                         $to_link = '0' x 7;
2248                 }
2249                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2250                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2251         }
2252
2253         return $line . "<br/>\n";
2254 }
2255
2256 # format from-file/to-file diff header
2257 sub format_diff_from_to_header {
2258         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2259         my $line;
2260         my $result = '';
2261
2262         $line = $from_line;
2263         #assert($line =~ m/^---/) if DEBUG;
2264         # no extra formatting for "^--- /dev/null"
2265         if (! $diffinfo->{'nparents'}) {
2266                 # ordinary (single parent) diff
2267                 if ($line =~ m!^--- "?a/!) {
2268                         if ($from->{'href'}) {
2269                                 $line = '--- a/' .
2270                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2271                                                 esc_path($from->{'file'}));
2272                         } else {
2273                                 $line = '--- a/' .
2274                                         esc_path($from->{'file'});
2275                         }
2276                 }
2277                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2278
2279         } else {
2280                 # combined diff (merge commit)
2281                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2282                         if ($from->{'href'}[$i]) {
2283                                 $line = '--- ' .
2284                                         $cgi->a({-href=>href(action=>"blobdiff",
2285                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2286                                                              hash_parent_base=>$parents[$i],
2287                                                              file_parent=>$from->{'file'}[$i],
2288                                                              hash=>$diffinfo->{'to_id'},
2289                                                              hash_base=>$hash,
2290                                                              file_name=>$to->{'file'}),
2291                                                  -class=>"path",
2292                                                  -title=>"diff" . ($i+1)},
2293                                                 $i+1) .
2294                                         '/' .
2295                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2296                                                 esc_path($from->{'file'}[$i]));
2297                         } else {
2298                                 $line = '--- /dev/null';
2299                         }
2300                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2301                 }
2302         }
2303
2304         $line = $to_line;
2305         #assert($line =~ m/^\+\+\+/) if DEBUG;
2306         # no extra formatting for "^+++ /dev/null"
2307         if ($line =~ m!^\+\+\+ "?b/!) {
2308                 if ($to->{'href'}) {
2309                         $line = '+++ b/' .
2310                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2311                                         esc_path($to->{'file'}));
2312                 } else {
2313                         $line = '+++ b/' .
2314                                 esc_path($to->{'file'});
2315                 }
2316         }
2317         $result .= qq!<div class="diff to_file">$line</div>\n!;
2318
2319         return $result;
2320 }
2321
2322 # create note for patch simplified by combined diff
2323 sub format_diff_cc_simplified {
2324         my ($diffinfo, @parents) = @_;
2325         my $result = '';
2326
2327         $result .= "<div class=\"diff header\">" .
2328                    "diff --cc ";
2329         if (!is_deleted($diffinfo)) {
2330                 $result .= $cgi->a({-href => href(action=>"blob",
2331                                                   hash_base=>$hash,
2332                                                   hash=>$diffinfo->{'to_id'},
2333                                                   file_name=>$diffinfo->{'to_file'}),
2334                                     -class => "path"},
2335                                    esc_path($diffinfo->{'to_file'}));
2336         } else {
2337                 $result .= esc_path($diffinfo->{'to_file'});
2338         }
2339         $result .= "</div>\n" . # class="diff header"
2340                    "<div class=\"diff nodifferences\">" .
2341                    "Simple merge" .
2342                    "</div>\n"; # class="diff nodifferences"
2343
2344         return $result;
2345 }
2346
2347 sub diff_line_class {
2348         my ($line, $from, $to) = @_;
2349
2350         # ordinary diff
2351         my $num_sign = 1;
2352         # combined diff
2353         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2354                 $num_sign = scalar @{$from->{'href'}};
2355         }
2356
2357         my @diff_line_classifier = (
2358                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2359                 { regexp => qr/^\\/,               class => "incomplete"  },
2360                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2361                 # classifier for context must come before classifier add/rem,
2362                 # or we would have to use more complicated regexp, for example
2363                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2364                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2365                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2366         );
2367         for my $clsfy (@diff_line_classifier) {
2368                 return $clsfy->{'class'}
2369                         if ($line =~ $clsfy->{'regexp'});
2370         }
2371
2372         # fallback
2373         return "";
2374 }
2375
2376 # assumes that $from and $to are defined and correctly filled,
2377 # and that $line holds a line of chunk header for unified diff
2378 sub format_unidiff_chunk_header {
2379         my ($line, $from, $to) = @_;
2380
2381         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2382                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2383
2384         $from_lines = 0 unless defined $from_lines;
2385         $to_lines   = 0 unless defined $to_lines;
2386
2387         if ($from->{'href'}) {
2388                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2389                                      -class=>"list"}, $from_text);
2390         }
2391         if ($to->{'href'}) {
2392                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2393                                      -class=>"list"}, $to_text);
2394         }
2395         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2396                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2397         return $line;
2398 }
2399
2400 # assumes that $from and $to are defined and correctly filled,
2401 # and that $line holds a line of chunk header for combined diff
2402 sub format_cc_diff_chunk_header {
2403         my ($line, $from, $to) = @_;
2404
2405         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2406         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2407
2408         @from_text = split(' ', $ranges);
2409         for (my $i = 0; $i < @from_text; ++$i) {
2410                 ($from_start[$i], $from_nlines[$i]) =
2411                         (split(',', substr($from_text[$i], 1)), 0);
2412         }
2413
2414         $to_text   = pop @from_text;
2415         $to_start  = pop @from_start;
2416         $to_nlines = pop @from_nlines;
2417
2418         $line = "<span class=\"chunk_info\">$prefix ";
2419         for (my $i = 0; $i < @from_text; ++$i) {
2420                 if ($from->{'href'}[$i]) {
2421                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2422                                           -class=>"list"}, $from_text[$i]);
2423                 } else {
2424                         $line .= $from_text[$i];
2425                 }
2426                 $line .= " ";
2427         }
2428         if ($to->{'href'}) {
2429                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2430                                   -class=>"list"}, $to_text);
2431         } else {
2432                 $line .= $to_text;
2433         }
2434         $line .= " $prefix</span>" .
2435                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2436         return $line;
2437 }
2438
2439 # process patch (diff) line (not to be used for diff headers),
2440 # returning HTML-formatted (but not wrapped) line.
2441 # If the line is passed as a reference, it is treated as HTML and not
2442 # esc_html()'ed.
2443 sub format_diff_line {
2444         my ($line, $diff_class, $from, $to) = @_;
2445
2446         if (ref($line)) {
2447                 $line = $$line;
2448         } else {
2449                 chomp $line;
2450                 $line = untabify($line);
2451
2452                 if ($from && $to && $line =~ m/^\@{2} /) {
2453                         $line = format_unidiff_chunk_header($line, $from, $to);
2454                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2455                         $line = format_cc_diff_chunk_header($line, $from, $to);
2456                 } else {
2457                         $line = esc_html($line, -nbsp=>1);
2458                 }
2459         }
2460
2461         my $diff_classes = "diff";
2462         $diff_classes .= " $diff_class" if ($diff_class);
2463         $line = "<div class=\"$diff_classes\">$line</div>\n";
2464
2465         return $line;
2466 }
2467
2468 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2469 # linked.  Pass the hash of the tree/commit to snapshot.
2470 sub format_snapshot_links {
2471         my ($hash) = @_;
2472         my $num_fmts = @snapshot_fmts;
2473         if ($num_fmts > 1) {
2474                 # A parenthesized list of links bearing format names.
2475                 # e.g. "snapshot (_tar.gz_ _zip_)"
2476                 return "snapshot (" . join(' ', map
2477                         $cgi->a({
2478                                 -href => href(
2479                                         action=>"snapshot",
2480                                         hash=>$hash,
2481                                         snapshot_format=>$_
2482                                 )
2483                         }, $known_snapshot_formats{$_}{'display'})
2484                 , @snapshot_fmts) . ")";
2485         } elsif ($num_fmts == 1) {
2486                 # A single "snapshot" link whose tooltip bears the format name.
2487                 # i.e. "_snapshot_"
2488                 my ($fmt) = @snapshot_fmts;
2489                 return
2490                         $cgi->a({
2491                                 -href => href(
2492                                         action=>"snapshot",
2493                                         hash=>$hash,
2494                                         snapshot_format=>$fmt
2495                                 ),
2496                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2497                         }, "snapshot");
2498         } else { # $num_fmts == 0
2499                 return undef;
2500         }
2501 }
2502
2503 ## ......................................................................
2504 ## functions returning values to be passed, perhaps after some
2505 ## transformation, to other functions; e.g. returning arguments to href()
2506
2507 # returns hash to be passed to href to generate gitweb URL
2508 # in -title key it returns description of link
2509 sub get_feed_info {
2510         my $format = shift || 'Atom';
2511         my %res = (action => lc($format));
2512
2513         # feed links are possible only for project views
2514         return unless (defined $project);
2515         # some views should link to OPML, or to generic project feed,
2516         # or don't have specific feed yet (so they should use generic)
2517         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2518
2519         my $branch;
2520         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2521         # from tag links; this also makes possible to detect branch links
2522         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2523             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2524                 $branch = $1;
2525         }
2526         # find log type for feed description (title)
2527         my $type = 'log';
2528         if (defined $file_name) {
2529                 $type  = "history of $file_name";
2530                 $type .= "/" if ($action eq 'tree');
2531                 $type .= " on '$branch'" if (defined $branch);
2532         } else {
2533                 $type = "log of $branch" if (defined $branch);
2534         }
2535
2536         $res{-title} = $type;
2537         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2538         $res{'file_name'} = $file_name;
2539
2540         return %res;
2541 }
2542
2543 ## ----------------------------------------------------------------------
2544 ## git utility subroutines, invoking git commands
2545
2546 # returns path to the core git executable and the --git-dir parameter as list
2547 sub git_cmd {
2548         $number_of_git_cmds++;
2549         return $GIT, '--git-dir='.$git_dir;
2550 }
2551
2552 # quote the given arguments for passing them to the shell
2553 # quote_command("command", "arg 1", "arg with ' and ! characters")
2554 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2555 # Try to avoid using this function wherever possible.
2556 sub quote_command {
2557         return join(' ',
2558                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2559 }
2560
2561 # get HEAD ref of given project as hash
2562 sub git_get_head_hash {
2563         return git_get_full_hash(shift, 'HEAD');
2564 }
2565
2566 sub git_get_full_hash {
2567         return git_get_hash(@_);
2568 }
2569
2570 sub git_get_short_hash {
2571         return git_get_hash(@_, '--short=7');
2572 }
2573
2574 sub git_get_hash {
2575         my ($project, $hash, @options) = @_;
2576         my $o_git_dir = $git_dir;
2577         my $retval = undef;
2578         $git_dir = "$projectroot/$project";
2579         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2580             '--verify', '-q', @options, $hash) {
2581                 $retval = <$fd>;
2582                 chomp $retval if defined $retval;
2583                 close $fd;
2584         }
2585         if (defined $o_git_dir) {
2586                 $git_dir = $o_git_dir;
2587         }
2588         return $retval;
2589 }
2590
2591 # get type of given object
2592 sub git_get_type {
2593         my $hash = shift;
2594
2595         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2596         my $type = <$fd>;
2597         close $fd or return;
2598         chomp $type;
2599         return $type;
2600 }
2601
2602 # repository configuration
2603 our $config_file = '';
2604 our %config;
2605
2606 # store multiple values for single key as anonymous array reference
2607 # single values stored directly in the hash, not as [ <value> ]
2608 sub hash_set_multi {
2609         my ($hash, $key, $value) = @_;
2610
2611         if (!exists $hash->{$key}) {
2612                 $hash->{$key} = $value;
2613         } elsif (!ref $hash->{$key}) {
2614                 $hash->{$key} = [ $hash->{$key}, $value ];
2615         } else {
2616                 push @{$hash->{$key}}, $value;
2617         }
2618 }
2619
2620 # return hash of git project configuration
2621 # optionally limited to some section, e.g. 'gitweb'
2622 sub git_parse_project_config {
2623         my $section_regexp = shift;
2624         my %config;
2625
2626         local $/ = "\0";
2627
2628         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2629                 or return;
2630
2631         while (my $keyval = <$fh>) {
2632                 chomp $keyval;
2633                 my ($key, $value) = split(/\n/, $keyval, 2);
2634
2635                 hash_set_multi(\%config, $key, $value)
2636                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2637         }
2638         close $fh;
2639
2640         return %config;
2641 }
2642
2643 # convert config value to boolean: 'true' or 'false'
2644 # no value, number > 0, 'true' and 'yes' values are true
2645 # rest of values are treated as false (never as error)
2646 sub config_to_bool {
2647         my $val = shift;
2648
2649         return 1 if !defined $val;             # section.key
2650
2651         # strip leading and trailing whitespace
2652         $val =~ s/^\s+//;
2653         $val =~ s/\s+$//;
2654
2655         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2656                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2657 }
2658
2659 # convert config value to simple decimal number
2660 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2661 # to be multiplied by 1024, 1048576, or 1073741824
2662 sub config_to_int {
2663         my $val = shift;
2664
2665         # strip leading and trailing whitespace
2666         $val =~ s/^\s+//;
2667         $val =~ s/\s+$//;
2668
2669         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2670                 $unit = lc($unit);
2671                 # unknown unit is treated as 1
2672                 return $num * ($unit eq 'g' ? 1073741824 :
2673                                $unit eq 'm' ?    1048576 :
2674                                $unit eq 'k' ?       1024 : 1);
2675         }
2676         return $val;
2677 }
2678
2679 # convert config value to array reference, if needed
2680 sub config_to_multi {
2681         my $val = shift;
2682
2683         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2684 }
2685
2686 sub git_get_project_config {
2687         my ($key, $type) = @_;
2688
2689         return unless defined $git_dir;
2690
2691         # key sanity check
2692         return unless ($key);
2693         # only subsection, if exists, is case sensitive,
2694         # and not lowercased by 'git config -z -l'
2695         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2696                 $key = join(".", lc($hi), $mi, lc($lo));
2697         } else {
2698                 $key = lc($key);
2699         }
2700         $key =~ s/^gitweb\.//;
2701         return if ($key =~ m/\W/);
2702
2703         # type sanity check
2704         if (defined $type) {
2705                 $type =~ s/^--//;
2706                 $type = undef
2707                         unless ($type eq 'bool' || $type eq 'int');
2708         }
2709
2710         # get config
2711         if (!defined $config_file ||
2712             $config_file ne "$git_dir/config") {
2713                 %config = git_parse_project_config('gitweb');
2714                 $config_file = "$git_dir/config";
2715         }
2716
2717         # check if config variable (key) exists
2718         return unless exists $config{"gitweb.$key"};
2719
2720         # ensure given type
2721         if (!defined $type) {
2722                 return $config{"gitweb.$key"};
2723         } elsif ($type eq 'bool') {
2724                 # backward compatibility: 'git config --bool' returns true/false
2725                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2726         } elsif ($type eq 'int') {
2727                 return config_to_int($config{"gitweb.$key"});
2728         }
2729         return $config{"gitweb.$key"};
2730 }
2731
2732 # get hash of given path at given ref
2733 sub git_get_hash_by_path {
2734         my $base = shift;
2735         my $path = shift || return undef;
2736         my $type = shift;
2737
2738         $path =~ s,/+$,,;
2739
2740         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2741                 or die_error(500, "Open git-ls-tree failed");
2742         my $line = <$fd>;
2743         close $fd or return undef;
2744
2745         if (!defined $line) {
2746                 # there is no tree or hash given by $path at $base
2747                 return undef;
2748         }
2749
2750         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2751         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2752         if (defined $type && $type ne $2) {
2753                 # type doesn't match
2754                 return undef;
2755         }
2756         return $3;
2757 }
2758
2759 # get path of entry with given hash at given tree-ish (ref)
2760 # used to get 'from' filename for combined diff (merge commit) for renames
2761 sub git_get_path_by_hash {
2762         my $base = shift || return;
2763         my $hash = shift || return;
2764
2765         local $/ = "\0";
2766
2767         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2768                 or return undef;
2769         while (my $line = <$fd>) {
2770                 chomp $line;
2771
2772                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2773                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2774                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2775                         close $fd;
2776                         return $1;
2777                 }
2778         }
2779         close $fd;
2780         return undef;
2781 }
2782
2783 ## ......................................................................
2784 ## git utility functions, directly accessing git repository
2785
2786 # get the value of config variable either from file named as the variable
2787 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2788 # configuration variable in the repository config file.
2789 sub git_get_file_or_project_config {
2790         my ($path, $name) = @_;
2791
2792         $git_dir = "$projectroot/$path";
2793         open my $fd, '<', "$git_dir/$name"
2794                 or return git_get_project_config($name);
2795         my $conf = <$fd>;
2796         close $fd;
2797         if (defined $conf) {
2798                 chomp $conf;
2799         }
2800         return $conf;
2801 }
2802
2803 sub git_get_project_description {
2804         my $path = shift;
2805         return git_get_file_or_project_config($path, 'description');
2806 }
2807
2808 sub git_get_project_category {
2809         my $path = shift;
2810         return git_get_file_or_project_config($path, 'category');
2811 }
2812
2813
2814 # supported formats:
2815 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2816 #   - if its contents is a number, use it as tag weight,
2817 #   - otherwise add a tag with weight 1
2818 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2819 #   the same value multiple times increases tag weight
2820 # * `gitweb.ctag' multi-valued repo config variable
2821 sub git_get_project_ctags {
2822         my $project = shift;
2823         my $ctags = {};
2824
2825         $git_dir = "$projectroot/$project";
2826         if (opendir my $dh, "$git_dir/ctags") {
2827                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2828                 foreach my $tagfile (@files) {
2829                         open my $ct, '<', $tagfile
2830                                 or next;
2831                         my $val = <$ct>;
2832                         chomp $val if $val;
2833                         close $ct;
2834
2835                         (my $ctag = $tagfile) =~ s#.*/##;
2836                         if ($val =~ /^\d+$/) {
2837                                 $ctags->{$ctag} = $val;
2838                         } else {
2839                                 $ctags->{$ctag} = 1;
2840                         }
2841                 }
2842                 closedir $dh;
2843
2844         } elsif (open my $fh, '<', "$git_dir/ctags") {
2845                 while (my $line = <$fh>) {
2846                         chomp $line;
2847                         $ctags->{$line}++ if $line;
2848                 }
2849                 close $fh;
2850
2851         } else {
2852                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2853                 foreach my $tag (@$taglist) {
2854                         $ctags->{$tag}++;
2855                 }
2856         }
2857
2858         return $ctags;
2859 }
2860
2861 # return hash, where keys are content tags ('ctags'),
2862 # and values are sum of weights of given tag in every project
2863 sub git_gather_all_ctags {
2864         my $projects = shift;
2865         my $ctags = {};
2866
2867         foreach my $p (@$projects) {
2868                 foreach my $ct (keys %{$p->{'ctags'}}) {
2869                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2870                 }
2871         }
2872
2873         return $ctags;
2874 }
2875
2876 sub git_populate_project_tagcloud {
2877         my $ctags = shift;
2878
2879         # First, merge different-cased tags; tags vote on casing
2880         my %ctags_lc;
2881         foreach (keys %$ctags) {
2882                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2883                 if (not $ctags_lc{lc $_}->{topcount}
2884                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2885                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2886                         $ctags_lc{lc $_}->{topname} = $_;
2887                 }
2888         }
2889
2890         my $cloud;
2891         my $matched = $input_params{'ctag'};
2892         if (eval { require HTML::TagCloud; 1; }) {
2893                 $cloud = HTML::TagCloud->new;
2894                 foreach my $ctag (sort keys %ctags_lc) {
2895                         # Pad the title with spaces so that the cloud looks
2896                         # less crammed.
2897                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2898                         $title =~ s/ /&nbsp;/g;
2899                         $title =~ s/^/&nbsp;/g;
2900                         $title =~ s/$/&nbsp;/g;
2901                         if (defined $matched && $matched eq $ctag) {
2902                                 $title = qq(<span class="match">$title</span>);
2903                         }
2904                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2905                                     $ctags_lc{$ctag}->{count});
2906                 }
2907         } else {
2908                 $cloud = {};
2909                 foreach my $ctag (keys %ctags_lc) {
2910                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2911                         if (defined $matched && $matched eq $ctag) {
2912                                 $title = qq(<span class="match">$title</span>);
2913                         }
2914                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2915                         $cloud->{$ctag}{ctag} =
2916                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2917                 }
2918         }
2919         return $cloud;
2920 }
2921
2922 sub git_show_project_tagcloud {
2923         my ($cloud, $count) = @_;
2924         if (ref $cloud eq 'HTML::TagCloud') {
2925                 return $cloud->html_and_css($count);
2926         } else {
2927                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2928                 return
2929                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2930                         join (', ', map {
2931                                 $cloud->{$_}->{'ctag'}
2932                         } splice(@tags, 0, $count)) .
2933                         '</div>';
2934         }
2935 }
2936
2937 sub git_get_project_url_list {
2938         my $path = shift;
2939
2940         $git_dir = "$projectroot/$path";
2941         open my $fd, '<', "$git_dir/cloneurl"
2942                 or return wantarray ?
2943                 @{ config_to_multi(git_get_project_config('url')) } :
2944                    config_to_multi(git_get_project_config('url'));
2945         my @git_project_url_list = map { chomp; $_ } <$fd>;
2946         close $fd;
2947
2948         return wantarray ? @git_project_url_list : \@git_project_url_list;
2949 }
2950
2951 sub git_get_projects_list {
2952         my $filter = shift || '';
2953         my $paranoid = shift;
2954         my @list;
2955
2956         if (-d $projects_list) {
2957                 # search in directory
2958                 my $dir = $projects_list;
2959                 # remove the trailing "/"
2960                 $dir =~ s!/+$!!;
2961                 my $pfxlen = length("$dir");
2962                 my $pfxdepth = ($dir =~ tr!/!!);
2963                 # when filtering, search only given subdirectory
2964                 if ($filter && !$paranoid) {
2965                         $dir .= "/$filter";
2966                         $dir =~ s!/+$!!;
2967                 }
2968
2969                 File::Find::find({
2970                         follow_fast => 1, # follow symbolic links
2971                         follow_skip => 2, # ignore duplicates
2972                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2973                         wanted => sub {
2974                                 # global variables
2975                                 our $project_maxdepth;
2976                                 our $projectroot;
2977                                 # skip project-list toplevel, if we get it.
2978                                 return if (m!^[/.]$!);
2979                                 # only directories can be git repositories
2980                                 return unless (-d $_);
2981                                 # don't traverse too deep (Find is super slow on os x)
2982                                 # $project_maxdepth excludes depth of $projectroot
2983                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2984                                         $File::Find::prune = 1;
2985                                         return;
2986                                 }
2987
2988                                 my $path = substr($File::Find::name, $pfxlen + 1);
2989                                 # paranoidly only filter here
2990                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2991                                         next;
2992                                 }
2993                                 # we check related file in $projectroot
2994                                 if (check_export_ok("$projectroot/$path")) {
2995                                         push @list, { path => $path };
2996                                         $File::Find::prune = 1;
2997                                 }
2998                         },
2999                 }, "$dir");
3000
3001         } elsif (-f $projects_list) {
3002                 # read from file(url-encoded):
3003                 # 'git%2Fgit.git Linus+Torvalds'
3004                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3005                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3006                 open my $fd, '<', $projects_list or return;
3007         PROJECT:
3008                 while (my $line = <$fd>) {
3009                         chomp $line;
3010                         my ($path, $owner) = split ' ', $line;
3011                         $path = unescape($path);
3012                         $owner = unescape($owner);
3013                         if (!defined $path) {
3014                                 next;
3015                         }
3016                         # if $filter is rpovided, check if $path begins with $filter
3017                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3018                                 next;
3019                         }
3020                         if (check_export_ok("$projectroot/$path")) {
3021                                 my $pr = {
3022                                         path => $path
3023                                 };
3024                                 if ($owner) {
3025                                         $pr->{'owner'} = to_utf8($owner);
3026                                 }
3027                                 push @list, $pr;
3028                         }
3029                 }
3030                 close $fd;
3031         }
3032         return @list;
3033 }
3034
3035 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3036 # as side effects it sets 'forks' field to list of forks for forked projects
3037 sub filter_forks_from_projects_list {
3038         my $projects = shift;
3039
3040         my %trie; # prefix tree of directories (path components)
3041         # generate trie out of those directories that might contain forks
3042         foreach my $pr (@$projects) {
3043                 my $path = $pr->{'path'};
3044                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3045                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3046                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3047                 next unless (-d "$projectroot/$path"); # containing directory exists
3048                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3049
3050                 # add to trie
3051                 my @dirs = split('/', $path);
3052                 # walk the trie, until either runs out of components or out of trie
3053                 my $ref = \%trie;
3054                 while (scalar @dirs &&
3055                        exists($ref->{$dirs[0]})) {
3056                         $ref = $ref->{shift @dirs};
3057                 }
3058                 # create rest of trie structure from rest of components
3059                 foreach my $dir (@dirs) {
3060                         $ref = $ref->{$dir} = {};
3061                 }
3062                 # create end marker, store $pr as a data
3063                 $ref->{''} = $pr if (!exists $ref->{''});
3064         }
3065
3066         # filter out forks, by finding shortest prefix match for paths
3067         my @filtered;
3068  PROJECT:
3069         foreach my $pr (@$projects) {
3070                 # trie lookup
3071                 my $ref = \%trie;
3072         DIR:
3073                 foreach my $dir (split('/', $pr->{'path'})) {
3074                         if (exists $ref->{''}) {
3075                                 # found [shortest] prefix, is a fork - skip it
3076                                 push @{$ref->{''}{'forks'}}, $pr;
3077                                 next PROJECT;
3078                         }
3079                         if (!exists $ref->{$dir}) {
3080                                 # not in trie, cannot have prefix, not a fork
3081                                 push @filtered, $pr;
3082                                 next PROJECT;
3083                         }
3084                         # If the dir is there, we just walk one step down the trie.
3085                         $ref = $ref->{$dir};
3086                 }
3087                 # we ran out of trie
3088                 # (shouldn't happen: it's either no match, or end marker)
3089                 push @filtered, $pr;
3090         }
3091
3092         return @filtered;
3093 }
3094
3095 # note: fill_project_list_info must be run first,
3096 # for 'descr_long' and 'ctags' to be filled
3097 sub search_projects_list {
3098         my ($projlist, %opts) = @_;
3099         my $tagfilter  = $opts{'tagfilter'};
3100         my $search_re = $opts{'search_regexp'};
3101
3102         return @$projlist
3103                 unless ($tagfilter || $search_re);
3104
3105         # searching projects require filling to be run before it;
3106         fill_project_list_info($projlist,
3107                                $tagfilter  ? 'ctags' : (),
3108                                $search_re ? ('path', 'descr') : ());
3109         my @projects;
3110  PROJECT:
3111         foreach my $pr (@$projlist) {
3112
3113                 if ($tagfilter) {
3114                         next unless ref($pr->{'ctags'}) eq 'HASH';
3115                         next unless
3116                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3117                 }
3118
3119                 if ($search_re) {
3120                         next unless
3121                                 $pr->{'path'} =~ /$search_re/ ||
3122                                 $pr->{'descr_long'} =~ /$search_re/;
3123                 }
3124
3125                 push @projects, $pr;
3126         }
3127
3128         return @projects;
3129 }
3130
3131 our $gitweb_project_owner = undef;
3132 sub git_get_project_list_from_file {
3133
3134         return if (defined $gitweb_project_owner);
3135
3136         $gitweb_project_owner = {};
3137         # read from file (url-encoded):
3138         # 'git%2Fgit.git Linus+Torvalds'
3139         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3140         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3141         if (-f $projects_list) {
3142                 open(my $fd, '<', $projects_list);
3143                 while (my $line = <$fd>) {
3144                         chomp $line;
3145                         my ($pr, $ow) = split ' ', $line;
3146                         $pr = unescape($pr);
3147                         $ow = unescape($ow);
3148                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3149                 }
3150                 close $fd;
3151         }
3152 }
3153
3154 sub git_get_project_owner {
3155         my $project = shift;
3156         my $owner;
3157
3158         return undef unless $project;
3159         $git_dir = "$projectroot/$project";
3160
3161         if (!defined $gitweb_project_owner) {
3162                 git_get_project_list_from_file();
3163         }
3164
3165         if (exists $gitweb_project_owner->{$project}) {
3166                 $owner = $gitweb_project_owner->{$project};
3167         }
3168         if (!defined $owner){
3169                 $owner = git_get_project_config('owner');
3170         }
3171         if (!defined $owner) {
3172                 $owner = get_file_owner("$git_dir");
3173         }
3174
3175         return $owner;
3176 }
3177
3178 sub git_get_last_activity {
3179         my ($path) = @_;
3180         my $fd;
3181
3182         $git_dir = "$projectroot/$path";
3183         open($fd, "-|", git_cmd(), 'for-each-ref',
3184              '--format=%(committer)',
3185              '--sort=-committerdate',
3186              '--count=1',
3187              'refs/heads') or return;
3188         my $most_recent = <$fd>;
3189         close $fd or return;
3190         if (defined $most_recent &&
3191             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3192                 my $timestamp = $1;
3193                 my $age = time - $timestamp;
3194                 return ($age, age_string($age));
3195         }
3196         return (undef, undef);
3197 }
3198
3199 # Implementation note: when a single remote is wanted, we cannot use 'git
3200 # remote show -n' because that command always work (assuming it's a remote URL
3201 # if it's not defined), and we cannot use 'git remote show' because that would
3202 # try to make a network roundtrip. So the only way to find if that particular
3203 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3204 # and when we find what we want.
3205 sub git_get_remotes_list {
3206         my $wanted = shift;
3207         my %remotes = ();
3208
3209         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3210         return unless $fd;
3211         while (my $remote = <$fd>) {
3212                 chomp $remote;
3213                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3214                 next if $wanted and not $remote eq $wanted;
3215                 my ($url, $key) = ($1, $2);
3216
3217                 $remotes{$remote} ||= { 'heads' => () };
3218                 $remotes{$remote}{$key} = $url;
3219         }
3220         close $fd or return;
3221         return wantarray ? %remotes : \%remotes;
3222 }
3223
3224 # Takes a hash of remotes as first parameter and fills it by adding the
3225 # available remote heads for each of the indicated remotes.
3226 sub fill_remote_heads {
3227         my $remotes = shift;
3228         my @heads = map { "remotes/$_" } keys %$remotes;
3229         my @remoteheads = git_get_heads_list(undef, @heads);
3230         foreach my $remote (keys %$remotes) {
3231                 $remotes->{$remote}{'heads'} = [ grep {
3232                         $_->{'name'} =~ s!^$remote/!!
3233                         } @remoteheads ];
3234         }
3235 }
3236
3237 sub git_get_references {
3238         my $type = shift || "";
3239         my %refs;
3240         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3241         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3242         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3243                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3244                 or return;
3245
3246         while (my $line = <$fd>) {
3247                 chomp $line;
3248                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3249                         if (defined $refs{$1}) {
3250                                 push @{$refs{$1}}, $2;
3251                         } else {
3252                                 $refs{$1} = [ $2 ];
3253                         }
3254                 }
3255         }
3256         close $fd or return;
3257         return \%refs;
3258 }
3259
3260 sub git_get_rev_name_tags {
3261         my $hash = shift || return undef;
3262
3263         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3264                 or return;
3265         my $name_rev = <$fd>;
3266         close $fd;
3267
3268         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3269                 return $1;
3270         } else {
3271                 # catches also '$hash undefined' output
3272                 return undef;
3273         }
3274 }
3275
3276 ## ----------------------------------------------------------------------
3277 ## parse to hash functions
3278
3279 sub parse_date {
3280         my $epoch = shift;
3281         my $tz = shift || "-0000";
3282
3283         my %date;
3284         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3285         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3286         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3287         $date{'hour'} = $hour;
3288         $date{'minute'} = $min;
3289         $date{'mday'} = $mday;
3290         $date{'day'} = $days[$wday];
3291         $date{'month'} = $months[$mon];
3292         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3293                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3294         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3295                              $mday, $months[$mon], $hour ,$min;
3296         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3297                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3298
3299         my ($tz_sign, $tz_hour, $tz_min) =
3300                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3301         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3302         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3303         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3304         $date{'hour_local'} = $hour;
3305         $date{'minute_local'} = $min;
3306         $date{'tz_local'} = $tz;
3307         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3308                                   1900+$year, $mon+1, $mday,
3309                                   $hour, $min, $sec, $tz);
3310         return %date;
3311 }
3312
3313 sub parse_tag {
3314         my $tag_id = shift;
3315         my %tag;
3316         my @comment;
3317
3318         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3319         $tag{'id'} = $tag_id;
3320         while (my $line = <$fd>) {
3321                 chomp $line;
3322                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3323                         $tag{'object'} = $1;
3324                 } elsif ($line =~ m/^type (.+)$/) {
3325                         $tag{'type'} = $1;
3326                 } elsif ($line =~ m/^tag (.+)$/) {
3327                         $tag{'name'} = $1;
3328                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3329                         $tag{'author'} = $1;
3330                         $tag{'author_epoch'} = $2;
3331                         $tag{'author_tz'} = $3;
3332                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3333                                 $tag{'author_name'}  = $1;
3334                                 $tag{'author_email'} = $2;
3335                         } else {
3336                                 $tag{'author_name'} = $tag{'author'};
3337                         }
3338                 } elsif ($line =~ m/--BEGIN/) {
3339                         push @comment, $line;
3340                         last;
3341                 } elsif ($line eq "") {
3342                         last;
3343                 }
3344         }
3345         push @comment, <$fd>;
3346         $tag{'comment'} = \@comment;
3347         close $fd or return;
3348         if (!defined $tag{'name'}) {
3349                 return
3350         };
3351         return %tag
3352 }
3353
3354 sub parse_commit_text {
3355         my ($commit_text, $withparents) = @_;
3356         my @commit_lines = split '\n', $commit_text;
3357         my %co;
3358
3359         pop @commit_lines; # Remove '\0'
3360
3361         if (! @commit_lines) {
3362                 return;
3363         }
3364
3365         my $header = shift @commit_lines;
3366         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3367                 return;
3368         }
3369         ($co{'id'}, my @parents) = split ' ', $header;
3370         while (my $line = shift @commit_lines) {
3371                 last if $line eq "\n";
3372                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3373                         $co{'tree'} = $1;
3374                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3375                         push @parents, $1;
3376                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3377                         $co{'author'} = to_utf8($1);
3378                         $co{'author_epoch'} = $2;
3379                         $co{'author_tz'} = $3;
3380                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3381                                 $co{'author_name'}  = $1;
3382                                 $co{'author_email'} = $2;
3383                         } else {
3384                                 $co{'author_name'} = $co{'author'};
3385                         }
3386                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3387                         $co{'committer'} = to_utf8($1);
3388                         $co{'committer_epoch'} = $2;
3389                         $co{'committer_tz'} = $3;
3390                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3391                                 $co{'committer_name'}  = $1;
3392                                 $co{'committer_email'} = $2;
3393                         } else {
3394                                 $co{'committer_name'} = $co{'committer'};
3395                         }
3396                 }
3397         }
3398         if (!defined $co{'tree'}) {
3399                 return;
3400         };
3401         $co{'parents'} = \@parents;
3402         $co{'parent'} = $parents[0];
3403
3404         foreach my $title (@commit_lines) {
3405                 $title =~ s/^    //;
3406                 if ($title ne "") {
3407                         $co{'title'} = chop_str($title, 80, 5);
3408                         # remove leading stuff of merges to make the interesting part visible
3409                         if (length($title) > 50) {
3410                                 $title =~ s/^Automatic //;
3411                                 $title =~ s/^merge (of|with) /Merge ... /i;
3412                                 if (length($title) > 50) {
3413                                         $title =~ s/(http|rsync):\/\///;
3414                                 }
3415                                 if (length($title) > 50) {
3416                                         $title =~ s/(master|www|rsync)\.//;
3417                                 }
3418                                 if (length($title) > 50) {
3419                                         $title =~ s/kernel.org:?//;
3420                                 }
3421                                 if (length($title) > 50) {
3422                                         $title =~ s/\/pub\/scm//;
3423                                 }
3424                         }
3425                         $co{'title_short'} = chop_str($title, 50, 5);
3426                         last;
3427                 }
3428         }
3429         if (! defined $co{'title'} || $co{'title'} eq "") {
3430                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3431         }
3432         # remove added spaces
3433         foreach my $line (@commit_lines) {
3434                 $line =~ s/^    //;
3435         }
3436         $co{'comment'} = \@commit_lines;
3437
3438         my $age = time - $co{'committer_epoch'};
3439         $co{'age'} = $age;
3440         $co{'age_string'} = age_string($age);
3441         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3442         if ($age > 60*60*24*7*2) {
3443                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3444                 $co{'age_string_age'} = $co{'age_string'};
3445         } else {
3446                 $co{'age_string_date'} = $co{'age_string'};
3447                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3448         }
3449         return %co;
3450 }
3451
3452 sub parse_commit {
3453         my ($commit_id) = @_;
3454         my %co;
3455
3456         local $/ = "\0";
3457
3458         open my $fd, "-|", git_cmd(), "rev-list",
3459                 "--parents",
3460                 "--header",
3461                 "--max-count=1",
3462                 $commit_id,
3463                 "--",
3464                 or die_error(500, "Open git-rev-list failed");
3465         %co = parse_commit_text(<$fd>, 1);
3466         close $fd;
3467
3468         return %co;
3469 }
3470
3471 sub parse_commits {
3472         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3473         my @cos;
3474
3475         $maxcount ||= 1;
3476         $skip ||= 0;
3477
3478         local $/ = "\0";
3479
3480         open my $fd, "-|", git_cmd(), "rev-list",
3481                 "--header",
3482                 @args,
3483                 ("--max-count=" . $maxcount),
3484                 ("--skip=" . $skip),
3485                 @extra_options,
3486                 $commit_id,
3487                 "--",
3488                 ($filename ? ($filename) : ())
3489                 or die_error(500, "Open git-rev-list failed");
3490         while (my $line = <$fd>) {
3491                 my %co = parse_commit_text($line);
3492                 push @cos, \%co;
3493         }
3494         close $fd;
3495
3496         return wantarray ? @cos : \@cos;
3497 }
3498
3499 # parse line of git-diff-tree "raw" output
3500 sub parse_difftree_raw_line {
3501         my $line = shift;
3502         my %res;
3503
3504         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3505         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3506         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3507                 $res{'from_mode'} = $1;
3508                 $res{'to_mode'} = $2;
3509                 $res{'from_id'} = $3;
3510                 $res{'to_id'} = $4;
3511                 $res{'status'} = $5;
3512                 $res{'similarity'} = $6;
3513                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3514                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3515                 } else {
3516                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3517                 }
3518         }
3519         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3520         # combined diff (for merge commit)
3521         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3522                 $res{'nparents'}  = length($1);
3523                 $res{'from_mode'} = [ split(' ', $2) ];
3524                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3525                 $res{'from_id'} = [ split(' ', $3) ];
3526                 $res{'to_id'} = pop @{$res{'from_id'}};
3527                 $res{'status'} = [ split('', $4) ];
3528                 $res{'to_file'} = unquote($5);
3529         }
3530         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3531         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3532                 $res{'commit'} = $1;
3533         }
3534
3535         return wantarray ? %res : \%res;
3536 }
3537
3538 # wrapper: return parsed line of git-diff-tree "raw" output
3539 # (the argument might be raw line, or parsed info)
3540 sub parsed_difftree_line {
3541         my $line_or_ref = shift;
3542
3543         if (ref($line_or_ref) eq "HASH") {
3544                 # pre-parsed (or generated by hand)
3545                 return $line_or_ref;
3546         } else {
3547                 return parse_difftree_raw_line($line_or_ref);
3548         }
3549 }
3550
3551 # parse line of git-ls-tree output
3552 sub parse_ls_tree_line {
3553         my $line = shift;
3554         my %opts = @_;
3555         my %res;
3556
3557         if ($opts{'-l'}) {
3558                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3559                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3560
3561                 $res{'mode'} = $1;
3562                 $res{'type'} = $2;
3563                 $res{'hash'} = $3;
3564                 $res{'size'} = $4;
3565                 if ($opts{'-z'}) {
3566                         $res{'name'} = $5;
3567                 } else {
3568                         $res{'name'} = unquote($5);
3569                 }
3570         } else {
3571                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3572                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3573
3574                 $res{'mode'} = $1;
3575                 $res{'type'} = $2;
3576                 $res{'hash'} = $3;
3577                 if ($opts{'-z'}) {
3578                         $res{'name'} = $4;
3579                 } else {
3580                         $res{'name'} = unquote($4);
3581                 }
3582         }
3583
3584         return wantarray ? %res : \%res;
3585 }
3586
3587 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3588 sub parse_from_to_diffinfo {
3589         my ($diffinfo, $from, $to, @parents) = @_;
3590
3591         if ($diffinfo->{'nparents'}) {
3592                 # combined diff
3593                 $from->{'file'} = [];
3594                 $from->{'href'} = [];
3595                 fill_from_file_info($diffinfo, @parents)
3596                         unless exists $diffinfo->{'from_file'};
3597                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3598                         $from->{'file'}[$i] =
3599                                 defined $diffinfo->{'from_file'}[$i] ?
3600                                         $diffinfo->{'from_file'}[$i] :
3601                                         $diffinfo->{'to_file'};
3602                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3603                                 $from->{'href'}[$i] = href(action=>"blob",
3604                                                            hash_base=>$parents[$i],
3605                                                            hash=>$diffinfo->{'from_id'}[$i],
3606                                                            file_name=>$from->{'file'}[$i]);
3607                         } else {
3608                                 $from->{'href'}[$i] = undef;
3609                         }
3610                 }
3611         } else {
3612                 # ordinary (not combined) diff
3613                 $from->{'file'} = $diffinfo->{'from_file'};
3614                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3615                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3616                                                hash=>$diffinfo->{'from_id'},
3617                                                file_name=>$from->{'file'});
3618                 } else {
3619                         delete $from->{'href'};
3620                 }
3621         }
3622
3623         $to->{'file'} = $diffinfo->{'to_file'};
3624         if (!is_deleted($diffinfo)) { # file exists in result
3625                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3626                                      hash=>$diffinfo->{'to_id'},
3627                                      file_name=>$to->{'file'});
3628         } else {
3629                 delete $to->{'href'};
3630         }
3631 }
3632
3633 ## ......................................................................
3634 ## parse to array of hashes functions
3635
3636 sub git_get_heads_list {
3637         my ($limit, @classes) = @_;
3638         @classes = ('heads') unless @classes;
3639         my @patterns = map { "refs/$_" } @classes;
3640         my @headslist;
3641
3642         open my $fd, '-|', git_cmd(), 'for-each-ref',
3643                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3644                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3645                 @patterns
3646                 or return;
3647         while (my $line = <$fd>) {
3648                 my %ref_item;
3649
3650                 chomp $line;
3651                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3652                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3653                 my ($committer, $epoch, $tz) =
3654                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3655                 $ref_item{'fullname'}  = $name;
3656                 $name =~ s!^refs/(?:head|remote)s/!!;
3657
3658                 $ref_item{'name'}  = $name;
3659                 $ref_item{'id'}    = $hash;
3660                 $ref_item{'title'} = $title || '(no commit message)';
3661                 $ref_item{'epoch'} = $epoch;
3662                 if ($epoch) {
3663                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3664                 } else {
3665                         $ref_item{'age'} = "unknown";
3666                 }
3667
3668                 push @headslist, \%ref_item;
3669         }
3670         close $fd;
3671
3672         return wantarray ? @headslist : \@headslist;
3673 }
3674
3675 sub git_get_tags_list {
3676         my $limit = shift;
3677         my @tagslist;
3678
3679         open my $fd, '-|', git_cmd(), 'for-each-ref',
3680                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3681                 '--format=%(objectname) %(objecttype) %(refname) '.
3682                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3683                 'refs/tags'
3684                 or return;
3685         while (my $line = <$fd>) {
3686                 my %ref_item;
3687
3688                 chomp $line;
3689                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3690                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3691                 my ($creator, $epoch, $tz) =
3692                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3693                 $ref_item{'fullname'} = $name;
3694                 $name =~ s!^refs/tags/!!;
3695
3696                 $ref_item{'type'} = $type;
3697                 $ref_item{'id'} = $id;
3698                 $ref_item{'name'} = $name;
3699                 if ($type eq "tag") {
3700                         $ref_item{'subject'} = $title;
3701                         $ref_item{'reftype'} = $reftype;
3702                         $ref_item{'refid'}   = $refid;
3703                 } else {
3704                         $ref_item{'reftype'} = $type;
3705                         $ref_item{'refid'}   = $id;
3706                 }
3707
3708                 if ($type eq "tag" || $type eq "commit") {
3709                         $ref_item{'epoch'} = $epoch;
3710                         if ($epoch) {
3711                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3712                         } else {
3713                                 $ref_item{'age'} = "unknown";
3714                         }
3715                 }
3716
3717                 push @tagslist, \%ref_item;
3718         }
3719         close $fd;
3720
3721         return wantarray ? @tagslist : \@tagslist;
3722 }
3723
3724 ## ----------------------------------------------------------------------
3725 ## filesystem-related functions
3726
3727 sub get_file_owner {
3728         my $path = shift;
3729
3730         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3731         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3732         if (!defined $gcos) {
3733                 return undef;
3734         }
3735         my $owner = $gcos;
3736         $owner =~ s/[,;].*$//;
3737         return to_utf8($owner);
3738 }
3739
3740 # assume that file exists
3741 sub insert_file {
3742         my $filename = shift;
3743
3744         open my $fd, '<', $filename;
3745         print map { to_utf8($_) } <$fd>;
3746         close $fd;
3747 }
3748
3749 ## ......................................................................
3750 ## mimetype related functions
3751
3752 sub mimetype_guess_file {
3753         my $filename = shift;
3754         my $mimemap = shift;
3755         -r $mimemap or return undef;
3756
3757         my %mimemap;
3758         open(my $mh, '<', $mimemap) or return undef;
3759         while (<$mh>) {
3760                 next if m/^#/; # skip comments
3761                 my ($mimetype, @exts) = split(/\s+/);
3762                 foreach my $ext (@exts) {
3763                         $mimemap{$ext} = $mimetype;
3764                 }
3765         }
3766         close($mh);
3767
3768         $filename =~ /\.([^.]*)$/;
3769         return $mimemap{$1};
3770 }
3771
3772 sub mimetype_guess {
3773         my $filename = shift;
3774         my $mime;
3775         $filename =~ /\./ or return undef;
3776
3777         if ($mimetypes_file) {
3778                 my $file = $mimetypes_file;
3779                 if ($file !~ m!^/!) { # if it is relative path
3780                         # it is relative to project
3781                         $file = "$projectroot/$project/$file";
3782                 }
3783                 $mime = mimetype_guess_file($filename, $file);
3784         }
3785         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3786         return $mime;
3787 }
3788
3789 sub blob_mimetype {
3790         my $fd = shift;
3791         my $filename = shift;
3792
3793         if ($filename) {
3794                 my $mime = mimetype_guess($filename);
3795                 $mime and return $mime;
3796         }
3797
3798         # just in case
3799         return $default_blob_plain_mimetype unless $fd;
3800
3801         if (-T $fd) {
3802                 return 'text/plain';
3803         } elsif (! $filename) {
3804                 return 'application/octet-stream';
3805         } elsif ($filename =~ m/\.png$/i) {
3806                 return 'image/png';
3807         } elsif ($filename =~ m/\.gif$/i) {
3808                 return 'image/gif';
3809         } elsif ($filename =~ m/\.jpe?g$/i) {
3810                 return 'image/jpeg';
3811         } else {
3812                 return 'application/octet-stream';
3813         }
3814 }
3815
3816 sub blob_contenttype {
3817         my ($fd, $file_name, $type) = @_;
3818
3819         $type ||= blob_mimetype($fd, $file_name);
3820         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3821                 $type .= "; charset=$default_text_plain_charset";
3822         }
3823
3824         return $type;
3825 }
3826
3827 # guess file syntax for syntax highlighting; return undef if no highlighting
3828 # the name of syntax can (in the future) depend on syntax highlighter used
3829 sub guess_file_syntax {
3830         my ($highlight, $mimetype, $file_name) = @_;
3831         return undef unless ($highlight && defined $file_name);
3832         my $basename = basename($file_name, '.in');
3833         return $highlight_basename{$basename}
3834                 if exists $highlight_basename{$basename};
3835
3836         $basename =~ /\.([^.]*)$/;
3837         my $ext = $1 or return undef;
3838         return $highlight_ext{$ext}
3839                 if exists $highlight_ext{$ext};
3840
3841         return undef;
3842 }
3843
3844 # run highlighter and return FD of its output,
3845 # or return original FD if no highlighting
3846 sub run_highlighter {
3847         my ($fd, $highlight, $syntax) = @_;
3848         return $fd unless ($highlight && defined $syntax);
3849
3850         close $fd;
3851         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3852                   quote_command($highlight_bin).
3853                   " --replace-tabs=8 --fragment --syntax $syntax |"
3854                 or die_error(500, "Couldn't open file or run syntax highlighter");
3855         return $fd;
3856 }
3857
3858 ## ======================================================================
3859 ## functions printing HTML: header, footer, error page
3860
3861 sub get_page_title {
3862         my $title = to_utf8($site_name);
3863
3864         unless (defined $project) {
3865                 if (defined $project_filter) {
3866                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3867                 }
3868                 return $title;
3869         }
3870         $title .= " - " . to_utf8($project);
3871
3872         return $title unless (defined $action);
3873         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3874
3875         return $title unless (defined $file_name);
3876         $title .= " - " . esc_path($file_name);
3877         if ($action eq "tree" && $file_name !~ m|/$|) {
3878                 $title .= "/";
3879         }
3880
3881         return $title;
3882 }
3883
3884 sub get_content_type_html {
3885         # require explicit support from the UA if we are to send the page as
3886         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3887         # we have to do this because MSIE sometimes globs '*/*', pretending to
3888         # support xhtml+xml but choking when it gets what it asked for.
3889         if (defined $cgi->http('HTTP_ACCEPT') &&
3890             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3891             $cgi->Accept('application/xhtml+xml') != 0) {
3892                 return 'application/xhtml+xml';
3893         } else {
3894                 return 'text/html';
3895         }
3896 }
3897
3898 sub print_feed_meta {
3899         if (defined $project) {
3900                 my %href_params = get_feed_info();
3901                 if (!exists $href_params{'-title'}) {
3902                         $href_params{'-title'} = 'log';
3903                 }
3904
3905                 foreach my $format (qw(RSS Atom)) {
3906                         my $type = lc($format);
3907                         my %link_attr = (
3908                                 '-rel' => 'alternate',
3909                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3910                                 '-type' => "application/$type+xml"
3911                         );
3912
3913                         $href_params{'extra_options'} = undef;
3914                         $href_params{'action'} = $type;
3915                         $link_attr{'-href'} = href(%href_params);
3916                         print "<link ".
3917                               "rel=\"$link_attr{'-rel'}\" ".
3918                               "title=\"$link_attr{'-title'}\" ".
3919                               "href=\"$link_attr{'-href'}\" ".
3920                               "type=\"$link_attr{'-type'}\" ".
3921                               "/>\n";
3922
3923                         $href_params{'extra_options'} = '--no-merges';
3924                         $link_attr{'-href'} = href(%href_params);
3925                         $link_attr{'-title'} .= ' (no merges)';
3926                         print "<link ".
3927                               "rel=\"$link_attr{'-rel'}\" ".
3928                               "title=\"$link_attr{'-title'}\" ".
3929                               "href=\"$link_attr{'-href'}\" ".
3930                               "type=\"$link_attr{'-type'}\" ".
3931                               "/>\n";
3932                 }
3933
3934         } else {
3935                 printf('<link rel="alternate" title="%s projects list" '.
3936                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3937                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3938                 printf('<link rel="alternate" title="%s projects feeds" '.
3939                        'href="%s" type="text/x-opml" />'."\n",
3940                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3941         }
3942 }
3943
3944 sub print_header_links {
3945         my $status = shift;
3946
3947         # print out each stylesheet that exist, providing backwards capability
3948         # for those people who defined $stylesheet in a config file
3949         if (defined $stylesheet) {
3950                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3951         } else {
3952                 foreach my $stylesheet (@stylesheets) {
3953                         next unless $stylesheet;
3954                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3955                 }
3956         }
3957         print_feed_meta()
3958                 if ($status eq '200 OK');
3959         if (defined $favicon) {
3960                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3961         }
3962 }
3963
3964 sub print_nav_breadcrumbs_path {
3965         my $dirprefix = undef;
3966         while (my $part = shift) {
3967                 $dirprefix .= "/" if defined $dirprefix;
3968                 $dirprefix .= $part;
3969                 print $cgi->a({-href => href(project => undef,
3970                                              project_filter => $dirprefix,
3971                                              action => "project_list")},
3972                               esc_html($part)) . " / ";
3973         }
3974 }
3975
3976 sub print_nav_breadcrumbs {
3977         my %opts = @_;
3978
3979         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3980         if (defined $project) {
3981                 my @dirname = split '/', $project;
3982                 my $projectbasename = pop @dirname;
3983                 print_nav_breadcrumbs_path(@dirname);
3984                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3985                 if (defined $action) {
3986                         my $action_print = $action ;
3987                         if (defined $opts{-action_extra}) {
3988                                 $action_print = $cgi->a({-href => href(action=>$action)},
3989                                         $action);
3990                         }
3991                         print " / $action_print";
3992                 }
3993                 if (defined $opts{-action_extra}) {
3994                         print " / $opts{-action_extra}";
3995                 }
3996                 print "\n";
3997         } elsif (defined $project_filter) {
3998                 print_nav_breadcrumbs_path(split '/', $project_filter);
3999         }
4000 }
4001
4002 sub print_search_form {
4003         if (!defined $searchtext) {
4004                 $searchtext = "";
4005         }
4006         my $search_hash;
4007         if (defined $hash_base) {
4008                 $search_hash = $hash_base;
4009         } elsif (defined $hash) {
4010                 $search_hash = $hash;
4011         } else {
4012                 $search_hash = "HEAD";
4013         }
4014         my $action = $my_uri;
4015         my $use_pathinfo = gitweb_check_feature('pathinfo');
4016         if ($use_pathinfo) {
4017                 $action .= "/".esc_url($project);
4018         }
4019         print $cgi->startform(-method => "get", -action => $action) .
4020               "<div class=\"search\">\n" .
4021               (!$use_pathinfo &&
4022               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4023               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4024               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4025               $cgi->popup_menu(-name => 'st', -default => 'commit',
4026                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4027               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4028               " search:\n",
4029               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4030               "<span title=\"Extended regular expression\">" .
4031               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4032                              -checked => $search_use_regexp) .
4033               "</span>" .
4034               "</div>" .
4035               $cgi->end_form() . "\n";
4036 }
4037
4038 sub git_header_html {
4039         my $status = shift || "200 OK";
4040         my $expires = shift;
4041         my %opts = @_;
4042
4043         my $title = get_page_title();
4044         my $content_type = get_content_type_html();
4045         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4046                            -status=> $status, -expires => $expires)
4047                 unless ($opts{'-no_http_header'});
4048         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4049         print <<EOF;
4050 <?xml version="1.0" encoding="utf-8"?>
4051 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4052 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4053 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4054 <!-- git core binaries version $git_version -->
4055 <head>
4056 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4057 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4058 <meta name="robots" content="index, nofollow"/>
4059 <title>$title</title>
4060 EOF
4061         # the stylesheet, favicon etc urls won't work correctly with path_info
4062         # unless we set the appropriate base URL
4063         if ($ENV{'PATH_INFO'}) {
4064                 print "<base href=\"".esc_url($base_url)."\" />\n";
4065         }
4066         print_header_links($status);
4067
4068         if (defined $site_html_head_string) {
4069                 print to_utf8($site_html_head_string);
4070         }
4071
4072         print "</head>\n" .
4073               "<body>\n";
4074
4075         if (defined $site_header && -f $site_header) {
4076                 insert_file($site_header);
4077         }
4078
4079         print "<div class=\"page_header\">\n";
4080         if (defined $logo) {
4081                 print $cgi->a({-href => esc_url($logo_url),
4082                                -title => $logo_label},
4083                               $cgi->img({-src => esc_url($logo),
4084                                          -width => 72, -height => 27,
4085                                          -alt => "git",
4086                                          -class => "logo"}));
4087         }
4088         print_nav_breadcrumbs(%opts);
4089         print "</div>\n";
4090
4091         my $have_search = gitweb_check_feature('search');
4092         if (defined $project && $have_search) {
4093                 print_search_form();
4094         }
4095 }
4096
4097 sub git_footer_html {
4098         my $feed_class = 'rss_logo';
4099
4100         print "<div class=\"page_footer\">\n";
4101         if (defined $project) {
4102                 my $descr = git_get_project_description($project);
4103                 if (defined $descr) {
4104                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4105                 }
4106
4107                 my %href_params = get_feed_info();
4108                 if (!%href_params) {
4109                         $feed_class .= ' generic';
4110                 }
4111                 $href_params{'-title'} ||= 'log';
4112
4113                 foreach my $format (qw(RSS Atom)) {
4114                         $href_params{'action'} = lc($format);
4115                         print $cgi->a({-href => href(%href_params),
4116                                       -title => "$href_params{'-title'} $format feed",
4117                                       -class => $feed_class}, $format)."\n";
4118                 }
4119
4120         } else {
4121                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4122                                              project_filter => $project_filter),
4123                               -class => $feed_class}, "OPML") . " ";
4124                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4125                                              project_filter => $project_filter),
4126                               -class => $feed_class}, "TXT") . "\n";
4127         }
4128         print "</div>\n"; # class="page_footer"
4129
4130         if (defined $t0 && gitweb_check_feature('timed')) {
4131                 print "<div id=\"generating_info\">\n";
4132                 print 'This page took '.
4133                       '<span id="generating_time" class="time_span">'.
4134                       tv_interval($t0, [ gettimeofday() ]).
4135                       ' seconds </span>'.
4136                       ' and '.
4137                       '<span id="generating_cmd">'.
4138                       $number_of_git_cmds.
4139                       '</span> git commands '.
4140                       " to generate.\n";
4141                 print "</div>\n"; # class="page_footer"
4142         }
4143
4144         if (defined $site_footer && -f $site_footer) {
4145                 insert_file($site_footer);
4146         }
4147
4148         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4149         if (defined $action &&
4150             $action eq 'blame_incremental') {
4151                 print qq!<script type="text/javascript">\n!.
4152                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4153                       qq!           "!. href() .qq!");\n!.
4154                       qq!</script>\n!;
4155         } else {
4156                 my ($jstimezone, $tz_cookie, $datetime_class) =
4157                         gitweb_get_feature('javascript-timezone');
4158
4159                 print qq!<script type="text/javascript">\n!.
4160                       qq!window.onload = function () {\n!;
4161                 if (gitweb_check_feature('javascript-actions')) {
4162                         print qq!       fixLinks();\n!;
4163                 }
4164                 if ($jstimezone && $tz_cookie && $datetime_class) {
4165                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4166                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4167                 }
4168                 print qq!};\n!.
4169                       qq!</script>\n!;
4170         }
4171
4172         print "</body>\n" .
4173               "</html>";
4174 }
4175
4176 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4177 # Example: die_error(404, 'Hash not found')
4178 # By convention, use the following status codes (as defined in RFC 2616):
4179 # 400: Invalid or missing CGI parameters, or
4180 #      requested object exists but has wrong type.
4181 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4182 #      this server or project.
4183 # 404: Requested object/revision/project doesn't exist.
4184 # 500: The server isn't configured properly, or
4185 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4186 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4187 # 503: The server is currently unavailable (because it is overloaded,
4188 #      or down for maintenance).  Generally, this is a temporary state.
4189 sub die_error {
4190         my $status = shift || 500;
4191         my $error = esc_html(shift) || "Internal Server Error";
4192         my $extra = shift;
4193         my %opts = @_;
4194
4195         my %http_responses = (
4196                 400 => '400 Bad Request',
4197                 403 => '403 Forbidden',
4198                 404 => '404 Not Found',
4199                 500 => '500 Internal Server Error',
4200                 503 => '503 Service Unavailable',
4201         );
4202         git_header_html($http_responses{$status}, undef, %opts);
4203         print <<EOF;
4204 <div class="page_body">
4205 <br /><br />
4206 $status - $error
4207 <br />
4208 EOF
4209         if (defined $extra) {
4210                 print "<hr />\n" .
4211                       "$extra\n";
4212         }
4213         print "</div>\n";
4214
4215         git_footer_html();
4216         goto DONE_GITWEB
4217                 unless ($opts{'-error_handler'});
4218 }
4219
4220 ## ----------------------------------------------------------------------
4221 ## functions printing or outputting HTML: navigation
4222
4223 sub git_print_page_nav {
4224         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4225         $extra = '' if !defined $extra; # pager or formats
4226
4227         my @navs = qw(summary shortlog log commit commitdiff tree);
4228         if ($suppress) {
4229                 @navs = grep { $_ ne $suppress } @navs;
4230         }
4231
4232         my %arg = map { $_ => {action=>$_} } @navs;
4233         if (defined $head) {
4234                 for (qw(commit commitdiff)) {
4235                         $arg{$_}{'hash'} = $head;
4236                 }
4237                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4238                         for (qw(shortlog log)) {
4239                                 $arg{$_}{'hash'} = $head;
4240                         }
4241                 }
4242         }
4243
4244         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4245         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4246
4247         my @actions = gitweb_get_feature('actions');
4248         my %repl = (
4249                 '%' => '%',
4250                 'n' => $project,         # project name
4251                 'f' => $git_dir,         # project path within filesystem
4252                 'h' => $treehead || '',  # current hash ('h' parameter)
4253                 'b' => $treebase || '',  # hash base ('hb' parameter)
4254         );
4255         while (@actions) {
4256                 my ($label, $link, $pos) = splice(@actions,0,3);
4257                 # insert
4258                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4259                 # munch munch
4260                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4261                 $arg{$label}{'_href'} = $link;
4262         }
4263
4264         print "<div class=\"page_nav\">\n" .
4265                 (join " | ",
4266                  map { $_ eq $current ?
4267                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4268                  } @navs);
4269         print "<br/>\n$extra<br/>\n" .
4270               "</div>\n";
4271 }
4272
4273 # returns a submenu for the nagivation of the refs views (tags, heads,
4274 # remotes) with the current view disabled and the remotes view only
4275 # available if the feature is enabled
4276 sub format_ref_views {
4277         my ($current) = @_;
4278         my @ref_views = qw{tags heads};
4279         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4280         return join " | ", map {
4281                 $_ eq $current ? $_ :
4282                 $cgi->a({-href => href(action=>$_)}, $_)
4283         } @ref_views
4284 }
4285
4286 sub format_paging_nav {
4287         my ($action, $page, $has_next_link) = @_;
4288         my $paging_nav;
4289
4290
4291         if ($page > 0) {
4292                 $paging_nav .=
4293                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4294                         " &sdot; " .
4295                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4296                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4297         } else {
4298                 $paging_nav .= "first &sdot; prev";
4299         }
4300
4301         if ($has_next_link) {
4302                 $paging_nav .= " &sdot; " .
4303                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4304                                  -accesskey => "n", -title => "Alt-n"}, "next");
4305         } else {
4306                 $paging_nav .= " &sdot; next";
4307         }
4308
4309         return $paging_nav;
4310 }
4311
4312 ## ......................................................................
4313 ## functions printing or outputting HTML: div
4314
4315 sub git_print_header_div {
4316         my ($action, $title, $hash, $hash_base) = @_;
4317         my %args = ();
4318
4319         $args{'action'} = $action;
4320         $args{'hash'} = $hash if $hash;
4321         $args{'hash_base'} = $hash_base if $hash_base;
4322
4323         print "<div class=\"header\">\n" .
4324               $cgi->a({-href => href(%args), -class => "title"},
4325               $title ? $title : $action) .
4326               "\n</div>\n";
4327 }
4328
4329 sub format_repo_url {
4330         my ($name, $url) = @_;
4331         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4332 }
4333
4334 # Group output by placing it in a DIV element and adding a header.
4335 # Options for start_div() can be provided by passing a hash reference as the
4336 # first parameter to the function.
4337 # Options to git_print_header_div() can be provided by passing an array
4338 # reference. This must follow the options to start_div if they are present.
4339 # The content can be a scalar, which is output as-is, a scalar reference, which
4340 # is output after html escaping, an IO handle passed either as *handle or
4341 # *handle{IO}, or a function reference. In the latter case all following
4342 # parameters will be taken as argument to the content function call.
4343 sub git_print_section {
4344         my ($div_args, $header_args, $content);
4345         my $arg = shift;
4346         if (ref($arg) eq 'HASH') {
4347                 $div_args = $arg;
4348                 $arg = shift;
4349         }
4350         if (ref($arg) eq 'ARRAY') {
4351                 $header_args = $arg;
4352                 $arg = shift;
4353         }
4354         $content = $arg;
4355
4356         print $cgi->start_div($div_args);
4357         git_print_header_div(@$header_args);
4358
4359         if (ref($content) eq 'CODE') {
4360                 $content->(@_);
4361         } elsif (ref($content) eq 'SCALAR') {
4362                 print esc_html($$content);
4363         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4364                 print <$content>;
4365         } elsif (!ref($content) && defined($content)) {
4366                 print $content;
4367         }
4368
4369         print $cgi->end_div;
4370 }
4371
4372 sub format_timestamp_html {
4373         my $date = shift;
4374         my $strtime = $date->{'rfc2822'};
4375
4376         my (undef, undef, $datetime_class) =
4377                 gitweb_get_feature('javascript-timezone');
4378         if ($datetime_class) {
4379                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4380         }
4381
4382         my $localtime_format = '(%02d:%02d %s)';
4383         if ($date->{'hour_local'} < 6) {
4384                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4385         }
4386         $strtime .= ' ' .
4387                     sprintf($localtime_format,
4388                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4389
4390         return $strtime;
4391 }
4392
4393 # Outputs the author name and date in long form
4394 sub git_print_authorship {
4395         my $co = shift;
4396         my %opts = @_;
4397         my $tag = $opts{-tag} || 'div';
4398         my $author = $co->{'author_name'};
4399
4400         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4401         print "<$tag class=\"author_date\">" .
4402               format_search_author($author, "author", esc_html($author)) .
4403               " [".format_timestamp_html(\%ad)."]".
4404               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4405               "</$tag>\n";
4406 }
4407
4408 # Outputs table rows containing the full author or committer information,
4409 # in the format expected for 'commit' view (& similar).
4410 # Parameters are a commit hash reference, followed by the list of people
4411 # to output information for. If the list is empty it defaults to both
4412 # author and committer.
4413 sub git_print_authorship_rows {
4414         my $co = shift;
4415         # too bad we can't use @people = @_ || ('author', 'committer')
4416         my @people = @_;
4417         @people = ('author', 'committer') unless @people;
4418         foreach my $who (@people) {
4419                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4420                 print "<tr><td>$who</td><td>" .
4421                       format_search_author($co->{"${who}_name"}, $who,
4422                                            esc_html($co->{"${who}_name"})) . " " .
4423                       format_search_author($co->{"${who}_email"}, $who,
4424                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4425                       "</td><td rowspan=\"2\">" .
4426                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4427                       "</td></tr>\n" .
4428                       "<tr>" .
4429                       "<td></td><td>" .
4430                       format_timestamp_html(\%wd) .
4431                       "</td>" .
4432                       "</tr>\n";
4433         }
4434 }
4435
4436 sub git_print_page_path {
4437         my $name = shift;
4438         my $type = shift;
4439         my $hb = shift;
4440
4441
4442         print "<div class=\"page_path\">";
4443         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4444                       -title => 'tree root'}, to_utf8("[$project]"));
4445         print " / ";
4446         if (defined $name) {
4447                 my @dirname = split '/', $name;
4448                 my $basename = pop @dirname;
4449                 my $fullname = '';
4450
4451                 foreach my $dir (@dirname) {
4452                         $fullname .= ($fullname ? '/' : '') . $dir;
4453                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4454                                                      hash_base=>$hb),
4455                                       -title => $fullname}, esc_path($dir));
4456                         print " / ";
4457                 }
4458                 if (defined $type && $type eq 'blob') {
4459                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4460                                                      hash_base=>$hb),
4461                                       -title => $name}, esc_path($basename));
4462                 } elsif (defined $type && $type eq 'tree') {
4463                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4464                                                      hash_base=>$hb),
4465                                       -title => $name}, esc_path($basename));
4466                         print " / ";
4467                 } else {
4468                         print esc_path($basename);
4469                 }
4470         }
4471         print "<br/></div>\n";
4472 }
4473
4474 sub git_print_log {
4475         my $log = shift;
4476         my %opts = @_;
4477
4478         if ($opts{'-remove_title'}) {
4479                 # remove title, i.e. first line of log
4480                 shift @$log;
4481         }
4482         # remove leading empty lines
4483         while (defined $log->[0] && $log->[0] eq "") {
4484                 shift @$log;
4485         }
4486
4487         # print log
4488         my $skip_blank_line = 0;
4489         foreach my $line (@$log) {
4490                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4491                         if (! $opts{'-remove_signoff'}) {
4492                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4493                                 $skip_blank_line = 1;
4494                         }
4495                         next;
4496                 }
4497
4498                 # print only one empty line
4499                 # do not print empty line after signoff
4500                 if ($line eq "") {
4501                         next if ($skip_blank_line);
4502                         $skip_blank_line = 1;
4503                 } else {
4504                         $skip_blank_line = 0;
4505                 }
4506
4507                 print format_log_line_html($line) . "<br/>\n";
4508         }
4509
4510         if ($opts{'-final_empty_line'}) {
4511                 # end with single empty line
4512                 print "<br/>\n" unless $skip_blank_line;
4513         }
4514 }
4515
4516 # return link target (what link points to)
4517 sub git_get_link_target {
4518         my $hash = shift;
4519         my $link_target;
4520
4521         # read link
4522         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4523                 or return;
4524         {
4525                 local $/ = undef;
4526                 $link_target = <$fd>;
4527         }
4528         close $fd
4529                 or return;
4530
4531         return $link_target;
4532 }
4533
4534 # given link target, and the directory (basedir) the link is in,
4535 # return target of link relative to top directory (top tree);
4536 # return undef if it is not possible (including absolute links).
4537 sub normalize_link_target {
4538         my ($link_target, $basedir) = @_;
4539
4540         # absolute symlinks (beginning with '/') cannot be normalized
4541         return if (substr($link_target, 0, 1) eq '/');
4542
4543         # normalize link target to path from top (root) tree (dir)
4544         my $path;
4545         if ($basedir) {
4546                 $path = $basedir . '/' . $link_target;
4547         } else {
4548                 # we are in top (root) tree (dir)
4549                 $path = $link_target;
4550         }
4551
4552         # remove //, /./, and /../
4553         my @path_parts;
4554         foreach my $part (split('/', $path)) {
4555                 # discard '.' and ''
4556                 next if (!$part || $part eq '.');
4557                 # handle '..'
4558                 if ($part eq '..') {
4559                         if (@path_parts) {
4560                                 pop @path_parts;
4561                         } else {
4562                                 # link leads outside repository (outside top dir)
4563                                 return;
4564                         }
4565                 } else {
4566                         push @path_parts, $part;
4567                 }
4568         }
4569         $path = join('/', @path_parts);
4570
4571         return $path;
4572 }
4573
4574 # print tree entry (row of git_tree), but without encompassing <tr> element
4575 sub git_print_tree_entry {
4576         my ($t, $basedir, $hash_base, $have_blame) = @_;
4577
4578         my %base_key = ();
4579         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4580
4581         # The format of a table row is: mode list link.  Where mode is
4582         # the mode of the entry, list is the name of the entry, an href,
4583         # and link is the action links of the entry.
4584
4585         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4586         if (exists $t->{'size'}) {
4587                 print "<td class=\"size\">$t->{'size'}</td>\n";
4588         }
4589         if ($t->{'type'} eq "blob") {
4590                 print "<td class=\"list\">" .
4591                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4592                                                file_name=>"$basedir$t->{'name'}", %base_key),
4593                                 -class => "list"}, esc_path($t->{'name'}));
4594                 if (S_ISLNK(oct $t->{'mode'})) {
4595                         my $link_target = git_get_link_target($t->{'hash'});
4596                         if ($link_target) {
4597                                 my $norm_target = normalize_link_target($link_target, $basedir);
4598                                 if (defined $norm_target) {
4599                                         print " -> " .
4600                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4601                                                                      file_name=>$norm_target),
4602                                                        -title => $norm_target}, esc_path($link_target));
4603                                 } else {
4604                                         print " -> " . esc_path($link_target);
4605                                 }
4606                         }
4607                 }
4608                 print "</td>\n";
4609                 print "<td class=\"link\">";
4610                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4611                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4612                               "blob");
4613                 if ($have_blame) {
4614                         print " | " .
4615                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4616                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4617                                       "blame");
4618                 }
4619                 if (defined $hash_base) {
4620                         print " | " .
4621                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4622                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4623                                       "history");
4624                 }
4625                 print " | " .
4626                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4627                                                file_name=>"$basedir$t->{'name'}")},
4628                                 "raw");
4629                 print "</td>\n";
4630
4631         } elsif ($t->{'type'} eq "tree") {
4632                 print "<td class=\"list\">";
4633                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4634                                              file_name=>"$basedir$t->{'name'}",
4635                                              %base_key)},
4636                               esc_path($t->{'name'}));
4637                 print "</td>\n";
4638                 print "<td class=\"link\">";
4639                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4640                                              file_name=>"$basedir$t->{'name'}",
4641                                              %base_key)},
4642                               "tree");
4643                 if (defined $hash_base) {
4644                         print " | " .
4645                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4646                                                      file_name=>"$basedir$t->{'name'}")},
4647                                       "history");
4648                 }
4649                 print "</td>\n";
4650         } else {
4651                 # unknown object: we can only present history for it
4652                 # (this includes 'commit' object, i.e. submodule support)
4653                 print "<td class=\"list\">" .
4654                       esc_path($t->{'name'}) .
4655                       "</td>\n";
4656                 print "<td class=\"link\">";
4657                 if (defined $hash_base) {
4658                         print $cgi->a({-href => href(action=>"history",
4659                                                      hash_base=>$hash_base,
4660                                                      file_name=>"$basedir$t->{'name'}")},
4661                                       "history");
4662                 }
4663                 print "</td>\n";
4664         }
4665 }
4666
4667 ## ......................................................................
4668 ## functions printing large fragments of HTML
4669
4670 # get pre-image filenames for merge (combined) diff
4671 sub fill_from_file_info {
4672         my ($diff, @parents) = @_;
4673
4674         $diff->{'from_file'} = [ ];
4675         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4676         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4677                 if ($diff->{'status'}[$i] eq 'R' ||
4678                     $diff->{'status'}[$i] eq 'C') {
4679                         $diff->{'from_file'}[$i] =
4680                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4681                 }
4682         }
4683
4684         return $diff;
4685 }
4686
4687 # is current raw difftree line of file deletion
4688 sub is_deleted {
4689         my $diffinfo = shift;
4690
4691         return $diffinfo->{'to_id'} eq ('0' x 40);
4692 }
4693
4694 # does patch correspond to [previous] difftree raw line
4695 # $diffinfo  - hashref of parsed raw diff format
4696 # $patchinfo - hashref of parsed patch diff format
4697 #              (the same keys as in $diffinfo)
4698 sub is_patch_split {
4699         my ($diffinfo, $patchinfo) = @_;
4700
4701         return defined $diffinfo && defined $patchinfo
4702                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4703 }
4704
4705
4706 sub git_difftree_body {
4707         my ($difftree, $hash, @parents) = @_;
4708         my ($parent) = $parents[0];
4709         my $have_blame = gitweb_check_feature('blame');
4710         print "<div class=\"list_head\">\n";
4711         if ($#{$difftree} > 10) {
4712                 print(($#{$difftree} + 1) . " files changed:\n");
4713         }
4714         print "</div>\n";
4715
4716         print "<table class=\"" .
4717               (@parents > 1 ? "combined " : "") .
4718               "diff_tree\">\n";
4719
4720         # header only for combined diff in 'commitdiff' view
4721         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4722         if ($has_header) {
4723                 # table header
4724                 print "<thead><tr>\n" .
4725                        "<th></th><th></th>\n"; # filename, patchN link
4726                 for (my $i = 0; $i < @parents; $i++) {
4727                         my $par = $parents[$i];
4728                         print "<th>" .
4729                               $cgi->a({-href => href(action=>"commitdiff",
4730                                                      hash=>$hash, hash_parent=>$par),
4731                                        -title => 'commitdiff to parent number ' .
4732                                                   ($i+1) . ': ' . substr($par,0,7)},
4733                                       $i+1) .
4734                               "&nbsp;</th>\n";
4735                 }
4736                 print "</tr></thead>\n<tbody>\n";
4737         }
4738
4739         my $alternate = 1;
4740         my $patchno = 0;
4741         foreach my $line (@{$difftree}) {
4742                 my $diff = parsed_difftree_line($line);
4743
4744                 if ($alternate) {
4745                         print "<tr class=\"dark\">\n";
4746                 } else {
4747                         print "<tr class=\"light\">\n";
4748                 }
4749                 $alternate ^= 1;
4750
4751                 if (exists $diff->{'nparents'}) { # combined diff
4752
4753                         fill_from_file_info($diff, @parents)
4754                                 unless exists $diff->{'from_file'};
4755
4756                         if (!is_deleted($diff)) {
4757                                 # file exists in the result (child) commit
4758                                 print "<td>" .
4759                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4760                                                              file_name=>$diff->{'to_file'},
4761                                                              hash_base=>$hash),
4762                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4763                                       "</td>\n";
4764                         } else {
4765                                 print "<td>" .
4766                                       esc_path($diff->{'to_file'}) .
4767                                       "</td>\n";
4768                         }
4769
4770                         if ($action eq 'commitdiff') {
4771                                 # link to patch
4772                                 $patchno++;
4773                                 print "<td class=\"link\">" .
4774                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4775                                               "patch") .
4776                                       " | " .
4777                                       "</td>\n";
4778                         }
4779
4780                         my $has_history = 0;
4781                         my $not_deleted = 0;
4782                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4783                                 my $hash_parent = $parents[$i];
4784                                 my $from_hash = $diff->{'from_id'}[$i];
4785                                 my $from_path = $diff->{'from_file'}[$i];
4786                                 my $status = $diff->{'status'}[$i];
4787
4788                                 $has_history ||= ($status ne 'A');
4789                                 $not_deleted ||= ($status ne 'D');
4790
4791                                 if ($status eq 'A') {
4792                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4793                                 } elsif ($status eq 'D') {
4794                                         print "<td class=\"link\">" .
4795                                               $cgi->a({-href => href(action=>"blob",
4796                                                                      hash_base=>$hash,
4797                                                                      hash=>$from_hash,
4798                                                                      file_name=>$from_path)},
4799                                                       "blob" . ($i+1)) .
4800                                               " | </td>\n";
4801                                 } else {
4802                                         if ($diff->{'to_id'} eq $from_hash) {
4803                                                 print "<td class=\"link nochange\">";
4804                                         } else {
4805                                                 print "<td class=\"link\">";
4806                                         }
4807                                         print $cgi->a({-href => href(action=>"blobdiff",
4808                                                                      hash=>$diff->{'to_id'},
4809                                                                      hash_parent=>$from_hash,
4810                                                                      hash_base=>$hash,
4811                                                                      hash_parent_base=>$hash_parent,
4812                                                                      file_name=>$diff->{'to_file'},
4813                                                                      file_parent=>$from_path)},
4814                                                       "diff" . ($i+1)) .
4815                                               " | </td>\n";
4816                                 }
4817                         }
4818
4819                         print "<td class=\"link\">";
4820                         if ($not_deleted) {
4821                                 print $cgi->a({-href => href(action=>"blob",
4822                                                              hash=>$diff->{'to_id'},
4823                                                              file_name=>$diff->{'to_file'},
4824                                                              hash_base=>$hash)},
4825                                               "blob");
4826                                 print " | " if ($has_history);
4827                         }
4828                         if ($has_history) {
4829                                 print $cgi->a({-href => href(action=>"history",
4830                                                              file_name=>$diff->{'to_file'},
4831                                                              hash_base=>$hash)},
4832                                               "history");
4833                         }
4834                         print "</td>\n";
4835
4836                         print "</tr>\n";
4837                         next; # instead of 'else' clause, to avoid extra indent
4838                 }
4839                 # else ordinary diff
4840
4841                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4842                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4843                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4844                         $to_mode_oct = oct $diff->{'to_mode'};
4845                         if (S_ISREG($to_mode_oct)) { # only for regular file
4846                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4847                         }
4848                         $to_file_type = file_type($diff->{'to_mode'});
4849                 }
4850                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4851                         $from_mode_oct = oct $diff->{'from_mode'};
4852                         if (S_ISREG($from_mode_oct)) { # only for regular file
4853                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4854                         }
4855                         $from_file_type = file_type($diff->{'from_mode'});
4856                 }
4857
4858                 if ($diff->{'status'} eq "A") { # created
4859                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4860                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4861                         $mode_chng   .= "]</span>";
4862                         print "<td>";
4863                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4864                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4865                                       -class => "list"}, esc_path($diff->{'file'}));
4866                         print "</td>\n";
4867                         print "<td>$mode_chng</td>\n";
4868                         print "<td class=\"link\">";
4869                         if ($action eq 'commitdiff') {
4870                                 # link to patch
4871                                 $patchno++;
4872                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4873                                               "patch") .
4874                                       " | ";
4875                         }
4876                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4877                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4878                                       "blob");
4879                         print "</td>\n";
4880
4881                 } elsif ($diff->{'status'} eq "D") { # deleted
4882                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4883                         print "<td>";
4884                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4885                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4886                                        -class => "list"}, esc_path($diff->{'file'}));
4887                         print "</td>\n";
4888                         print "<td>$mode_chng</td>\n";
4889                         print "<td class=\"link\">";
4890                         if ($action eq 'commitdiff') {
4891                                 # link to patch
4892                                 $patchno++;
4893                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4894                                               "patch") .
4895                                       " | ";
4896                         }
4897                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4898                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4899                                       "blob") . " | ";
4900                         if ($have_blame) {
4901                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4902                                                              file_name=>$diff->{'file'})},
4903                                               "blame") . " | ";
4904                         }
4905                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4906                                                      file_name=>$diff->{'file'})},
4907                                       "history");
4908                         print "</td>\n";
4909
4910                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4911                         my $mode_chnge = "";
4912                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4913                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4914                                 if ($from_file_type ne $to_file_type) {
4915                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4916                                 }
4917                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4918                                         if ($from_mode_str && $to_mode_str) {
4919                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4920                                         } elsif ($to_mode_str) {
4921                                                 $mode_chnge .= " mode: $to_mode_str";
4922                                         }
4923                                 }
4924                                 $mode_chnge .= "]</span>\n";
4925                         }
4926                         print "<td>";
4927                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4928                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4929                                       -class => "list"}, esc_path($diff->{'file'}));
4930                         print "</td>\n";
4931                         print "<td>$mode_chnge</td>\n";
4932                         print "<td class=\"link\">";
4933                         if ($action eq 'commitdiff') {
4934                                 # link to patch
4935                                 $patchno++;
4936                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4937                                               "patch") .
4938                                       " | ";
4939                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4940                                 # "commit" view and modified file (not onlu mode changed)
4941                                 print $cgi->a({-href => href(action=>"blobdiff",
4942                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4943                                                              hash_base=>$hash, hash_parent_base=>$parent,
4944                                                              file_name=>$diff->{'file'})},
4945                                               "diff") .
4946                                       " | ";
4947                         }
4948                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4949                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4950                                        "blob") . " | ";
4951                         if ($have_blame) {
4952                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4953                                                              file_name=>$diff->{'file'})},
4954                                               "blame") . " | ";
4955                         }
4956                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4957                                                      file_name=>$diff->{'file'})},
4958                                       "history");
4959                         print "</td>\n";
4960
4961                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4962                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4963                         my $nstatus = $status_name{$diff->{'status'}};
4964                         my $mode_chng = "";
4965                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4966                                 # mode also for directories, so we cannot use $to_mode_str
4967                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4968                         }
4969                         print "<td>" .
4970                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4971                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4972                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4973                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4974                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4975                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4976                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4977                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4978                               "<td class=\"link\">";
4979                         if ($action eq 'commitdiff') {
4980                                 # link to patch
4981                                 $patchno++;
4982                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4983                                               "patch") .
4984                                       " | ";
4985                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4986                                 # "commit" view and modified file (not only pure rename or copy)
4987                                 print $cgi->a({-href => href(action=>"blobdiff",
4988                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4989                                                              hash_base=>$hash, hash_parent_base=>$parent,
4990                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4991                                               "diff") .
4992                                       " | ";
4993                         }
4994                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4995                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4996                                       "blob") . " | ";
4997                         if ($have_blame) {
4998                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4999                                                              file_name=>$diff->{'to_file'})},
5000                                               "blame") . " | ";
5001                         }
5002                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5003                                                     file_name=>$diff->{'to_file'})},
5004                                       "history");
5005                         print "</td>\n";
5006
5007                 } # we should not encounter Unmerged (U) or Unknown (X) status
5008                 print "</tr>\n";
5009         }
5010         print "</tbody>" if $has_header;
5011         print "</table>\n";
5012 }
5013
5014 # Print context lines and then rem/add lines in a side-by-side manner.
5015 sub print_sidebyside_diff_lines {
5016         my ($ctx, $rem, $add) = @_;
5017
5018         # print context block before add/rem block
5019         if (@$ctx) {
5020                 print join '',
5021                         '<div class="chunk_block ctx">',
5022                                 '<div class="old">',
5023                                 @$ctx,
5024                                 '</div>',
5025                                 '<div class="new">',
5026                                 @$ctx,
5027                                 '</div>',
5028                         '</div>';
5029         }
5030
5031         if (!@$add) {
5032                 # pure removal
5033                 print join '',
5034                         '<div class="chunk_block rem">',
5035                                 '<div class="old">',
5036                                 @$rem,
5037                                 '</div>',
5038                         '</div>';
5039         } elsif (!@$rem) {
5040                 # pure addition
5041                 print join '',
5042                         '<div class="chunk_block add">',
5043                                 '<div class="new">',
5044                                 @$add,
5045                                 '</div>',
5046                         '</div>';
5047         } else {
5048                 print join '',
5049                         '<div class="chunk_block chg">',
5050                                 '<div class="old">',
5051                                 @$rem,
5052                                 '</div>',
5053                                 '<div class="new">',
5054                                 @$add,
5055                                 '</div>',
5056                         '</div>';
5057         }
5058 }
5059
5060 # Print context lines and then rem/add lines in inline manner.
5061 sub print_inline_diff_lines {
5062         my ($ctx, $rem, $add) = @_;
5063
5064         print @$ctx, @$rem, @$add;
5065 }
5066
5067 # Format removed and added line, mark changed part and HTML-format them.
5068 # Implementation is based on contrib/diff-highlight
5069 sub format_rem_add_lines_pair {
5070         my ($rem, $add, $num_parents) = @_;
5071
5072         # We need to untabify lines before split()'ing them;
5073         # otherwise offsets would be invalid.
5074         chomp $rem;
5075         chomp $add;
5076         $rem = untabify($rem);
5077         $add = untabify($add);
5078
5079         my @rem = split(//, $rem);
5080         my @add = split(//, $add);
5081         my ($esc_rem, $esc_add);
5082         # Ignore leading +/- characters for each parent.
5083         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5084         my ($prefix_has_nonspace, $suffix_has_nonspace);
5085
5086         my $shorter = (@rem < @add) ? @rem : @add;
5087         while ($prefix_len < $shorter) {
5088                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5089
5090                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5091                 $prefix_len++;
5092         }
5093
5094         while ($prefix_len + $suffix_len < $shorter) {
5095                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5096
5097                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5098                 $suffix_len++;
5099         }
5100
5101         # Mark lines that are different from each other, but have some common
5102         # part that isn't whitespace.  If lines are completely different, don't
5103         # mark them because that would make output unreadable, especially if
5104         # diff consists of multiple lines.
5105         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5106                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5107                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5108                 $esc_add = esc_html_hl_regions($add, 'marked',
5109                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5110         } else {
5111                 $esc_rem = esc_html($rem, -nbsp=>1);
5112                 $esc_add = esc_html($add, -nbsp=>1);
5113         }
5114
5115         return format_diff_line(\$esc_rem, 'rem'),
5116                format_diff_line(\$esc_add, 'add');
5117 }
5118
5119 # HTML-format diff context, removed and added lines.
5120 sub format_ctx_rem_add_lines {
5121         my ($ctx, $rem, $add, $num_parents) = @_;
5122         my (@new_ctx, @new_rem, @new_add);
5123         my $can_highlight = 0;
5124         my $is_combined = ($num_parents > 1);
5125
5126         # Highlight if every removed line has a corresponding added line.
5127         if (@$add > 0 && @$add == @$rem) {
5128                 $can_highlight = 1;
5129
5130                 # Highlight lines in combined diff only if the chunk contains
5131                 # diff between the same version, e.g.
5132                 #
5133                 #    - a
5134                 #   -  b
5135                 #    + c
5136                 #   +  d
5137                 #
5138                 # Otherwise the highlightling would be confusing.
5139                 if ($is_combined) {
5140                         for (my $i = 0; $i < @$add; $i++) {
5141                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5142                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5143
5144                                 $prefix_rem =~ s/-/+/g;
5145
5146                                 if ($prefix_rem ne $prefix_add) {
5147                                         $can_highlight = 0;
5148                                         last;
5149                                 }
5150                         }
5151                 }
5152         }
5153
5154         if ($can_highlight) {
5155                 for (my $i = 0; $i < @$add; $i++) {
5156                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5157                                 $rem->[$i], $add->[$i], $num_parents);
5158                         push @new_rem, $line_rem;
5159                         push @new_add, $line_add;
5160                 }
5161         } else {
5162                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5163                 @new_add = map { format_diff_line($_, 'add') } @$add;
5164         }
5165
5166         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5167
5168         return (\@new_ctx, \@new_rem, \@new_add);
5169 }
5170
5171 # Print context lines and then rem/add lines.
5172 sub print_diff_lines {
5173         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5174         my $is_combined = $num_parents > 1;
5175
5176         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5177                 $num_parents);
5178
5179         if ($diff_style eq 'sidebyside' && !$is_combined) {
5180                 print_sidebyside_diff_lines($ctx, $rem, $add);
5181         } else {
5182                 # default 'inline' style and unknown styles
5183                 print_inline_diff_lines($ctx, $rem, $add);
5184         }
5185 }
5186
5187 sub print_diff_chunk {
5188         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5189         my (@ctx, @rem, @add);
5190
5191         # The class of the previous line.
5192         my $prev_class = '';
5193
5194         return unless @chunk;
5195
5196         # incomplete last line might be among removed or added lines,
5197         # or both, or among context lines: find which
5198         for (my $i = 1; $i < @chunk; $i++) {
5199                 if ($chunk[$i][0] eq 'incomplete') {
5200                         $chunk[$i][0] = $chunk[$i-1][0];
5201                 }
5202         }
5203
5204         # guardian
5205         push @chunk, ["", ""];
5206
5207         foreach my $line_info (@chunk) {
5208                 my ($class, $line) = @$line_info;
5209
5210                 # print chunk headers
5211                 if ($class && $class eq 'chunk_header') {
5212                         print format_diff_line($line, $class, $from, $to);
5213                         next;
5214                 }
5215
5216                 ## print from accumulator when have some add/rem lines or end
5217                 # of chunk (flush context lines), or when have add and rem
5218                 # lines and new block is reached (otherwise add/rem lines could
5219                 # be reordered)
5220                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5221                     (@rem && @add && $class ne $prev_class)) {
5222                         print_diff_lines(\@ctx, \@rem, \@add,
5223                                          $diff_style, $num_parents);
5224                         @ctx = @rem = @add = ();
5225                 }
5226
5227                 ## adding lines to accumulator
5228                 # guardian value
5229                 last unless $line;
5230                 # rem, add or change
5231                 if ($class eq 'rem') {
5232                         push @rem, $line;
5233                 } elsif ($class eq 'add') {
5234                         push @add, $line;
5235                 }
5236                 # context line
5237                 if ($class eq 'ctx') {
5238                         push @ctx, $line;
5239                 }
5240
5241                 $prev_class = $class;
5242         }
5243 }
5244
5245 sub git_patchset_body {
5246         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5247         my ($hash_parent) = $hash_parents[0];
5248
5249         my $is_combined = (@hash_parents > 1);
5250         my $patch_idx = 0;
5251         my $patch_number = 0;
5252         my $patch_line;
5253         my $diffinfo;
5254         my $to_name;
5255         my (%from, %to);
5256         my @chunk; # for side-by-side diff
5257
5258         print "<div class=\"patchset\">\n";
5259
5260         # skip to first patch
5261         while ($patch_line = <$fd>) {
5262                 chomp $patch_line;
5263
5264                 last if ($patch_line =~ m/^diff /);
5265         }
5266
5267  PATCH:
5268         while ($patch_line) {
5269
5270                 # parse "git diff" header line
5271                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5272                         # $1 is from_name, which we do not use
5273                         $to_name = unquote($2);
5274                         $to_name =~ s!^b/!!;
5275                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5276                         # $1 is 'cc' or 'combined', which we do not use
5277                         $to_name = unquote($2);
5278                 } else {
5279                         $to_name = undef;
5280                 }
5281
5282                 # check if current patch belong to current raw line
5283                 # and parse raw git-diff line if needed
5284                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5285                         # this is continuation of a split patch
5286                         print "<div class=\"patch cont\">\n";
5287                 } else {
5288                         # advance raw git-diff output if needed
5289                         $patch_idx++ if defined $diffinfo;
5290
5291                         # read and prepare patch information
5292                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5293
5294                         # compact combined diff output can have some patches skipped
5295                         # find which patch (using pathname of result) we are at now;
5296                         if ($is_combined) {
5297                                 while ($to_name ne $diffinfo->{'to_file'}) {
5298                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5299                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5300                                               "</div>\n";  # class="patch"
5301
5302                                         $patch_idx++;
5303                                         $patch_number++;
5304
5305                                         last if $patch_idx > $#$difftree;
5306                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5307                                 }
5308                         }
5309
5310                         # modifies %from, %to hashes
5311                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5312
5313                         # this is first patch for raw difftree line with $patch_idx index
5314                         # we index @$difftree array from 0, but number patches from 1
5315                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5316                 }
5317
5318                 # git diff header
5319                 #assert($patch_line =~ m/^diff /) if DEBUG;
5320                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5321                 $patch_number++;
5322                 # print "git diff" header
5323                 print format_git_diff_header_line($patch_line, $diffinfo,
5324                                                   \%from, \%to);
5325
5326                 # print extended diff header
5327                 print "<div class=\"diff extended_header\">\n";
5328         EXTENDED_HEADER:
5329                 while ($patch_line = <$fd>) {
5330                         chomp $patch_line;
5331
5332                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5333
5334                         print format_extended_diff_header_line($patch_line, $diffinfo,
5335                                                                \%from, \%to);
5336                 }
5337                 print "</div>\n"; # class="diff extended_header"
5338
5339                 # from-file/to-file diff header
5340                 if (! $patch_line) {
5341                         print "</div>\n"; # class="patch"
5342                         last PATCH;
5343                 }
5344                 next PATCH if ($patch_line =~ m/^diff /);
5345                 #assert($patch_line =~ m/^---/) if DEBUG;
5346
5347                 my $last_patch_line = $patch_line;
5348                 $patch_line = <$fd>;
5349                 chomp $patch_line;
5350                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5351
5352                 print format_diff_from_to_header($last_patch_line, $patch_line,
5353                                                  $diffinfo, \%from, \%to,
5354                                                  @hash_parents);
5355
5356                 # the patch itself
5357         LINE:
5358                 while ($patch_line = <$fd>) {
5359                         chomp $patch_line;
5360
5361                         next PATCH if ($patch_line =~ m/^diff /);
5362
5363                         my $class = diff_line_class($patch_line, \%from, \%to);
5364
5365                         if ($class eq 'chunk_header') {
5366                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5367                                 @chunk = ();
5368                         }
5369
5370                         push @chunk, [ $class, $patch_line ];
5371                 }
5372
5373         } continue {
5374                 if (@chunk) {
5375                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5376                         @chunk = ();
5377                 }
5378                 print "</div>\n"; # class="patch"
5379         }
5380
5381         # for compact combined (--cc) format, with chunk and patch simplification
5382         # the patchset might be empty, but there might be unprocessed raw lines
5383         for (++$patch_idx if $patch_number > 0;
5384              $patch_idx < @$difftree;
5385              ++$patch_idx) {
5386                 # read and prepare patch information
5387                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5388
5389                 # generate anchor for "patch" links in difftree / whatchanged part
5390                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5391                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5392                       "</div>\n";  # class="patch"
5393
5394                 $patch_number++;
5395         }
5396
5397         if ($patch_number == 0) {
5398                 if (@hash_parents > 1) {
5399                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5400                 } else {
5401                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5402                 }
5403         }
5404
5405         print "</div>\n"; # class="patchset"
5406 }
5407
5408 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5409
5410 sub git_project_search_form {
5411         my ($searchtext, $search_use_regexp) = @_;
5412
5413         my $limit = '';
5414         if ($project_filter) {
5415                 $limit = " in '$project_filter/'";
5416         }
5417
5418         print "<div class=\"projsearch\">\n";
5419         print $cgi->startform(-method => 'get', -action => $my_uri) .
5420               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5421         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5422                 if (defined $project_filter);
5423         print $cgi->textfield(-name => 's', -value => $searchtext,
5424                               -title => "Search project by name and description$limit",
5425                               -size => 60) . "\n" .
5426               "<span title=\"Extended regular expression\">" .
5427               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5428                              -checked => $search_use_regexp) .
5429               "</span>\n" .
5430               $cgi->submit(-name => 'btnS', -value => 'Search') .
5431               $cgi->end_form() . "\n" .
5432               $cgi->a({-href => href(project => undef, searchtext => undef,
5433                                      project_filter => $project_filter)},
5434                       esc_html("List all projects$limit")) . "<br />\n";
5435         print "</div>\n";
5436 }
5437
5438 # entry for given @keys needs filling if at least one of keys in list
5439 # is not present in %$project_info
5440 sub project_info_needs_filling {
5441         my ($project_info, @keys) = @_;
5442
5443         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5444         foreach my $key (@keys) {
5445                 if (!exists $project_info->{$key}) {
5446                         return 1;
5447                 }
5448         }
5449         return;
5450 }
5451
5452 # fills project list info (age, description, owner, category, forks, etc.)
5453 # for each project in the list, removing invalid projects from
5454 # returned list, or fill only specified info.
5455 #
5456 # Invalid projects are removed from the returned list if and only if you
5457 # ask 'age' or 'age_string' to be filled, because they are the only fields
5458 # that run unconditionally git command that requires repository, and
5459 # therefore do always check if project repository is invalid.
5460 #
5461 # USAGE:
5462 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5463 #   ensures that 'descr_long' and 'ctags' fields are filled
5464 # * @project_list = fill_project_list_info(\@project_list)
5465 #   ensures that all fields are filled (and invalid projects removed)
5466 #
5467 # NOTE: modifies $projlist, but does not remove entries from it
5468 sub fill_project_list_info {
5469         my ($projlist, @wanted_keys) = @_;
5470         my @projects;
5471         my $filter_set = sub { return @_; };
5472         if (@wanted_keys) {
5473                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5474                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5475         }
5476
5477         my $show_ctags = gitweb_check_feature('ctags');
5478  PROJECT:
5479         foreach my $pr (@$projlist) {
5480                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5481                         my (@activity) = git_get_last_activity($pr->{'path'});
5482                         unless (@activity) {
5483                                 next PROJECT;
5484                         }
5485                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5486                 }
5487                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5488                         my $descr = git_get_project_description($pr->{'path'}) || "";
5489                         $descr = to_utf8($descr);
5490                         $pr->{'descr_long'} = $descr;
5491                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5492                 }
5493                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5494                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5495                 }
5496                 if ($show_ctags &&
5497                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5498                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5499                 }
5500                 if ($projects_list_group_categories &&
5501                     project_info_needs_filling($pr, $filter_set->('category'))) {
5502                         my $cat = git_get_project_category($pr->{'path'}) ||
5503                                                            $project_list_default_category;
5504                         $pr->{'category'} = to_utf8($cat);
5505                 }
5506
5507                 push @projects, $pr;
5508         }
5509
5510         return @projects;
5511 }
5512
5513 sub sort_projects_list {
5514         my ($projlist, $order) = @_;
5515         my @projects;
5516
5517         my %order_info = (
5518                 project => { key => 'path', type => 'str' },
5519                 descr => { key => 'descr_long', type => 'str' },
5520                 owner => { key => 'owner', type => 'str' },
5521                 age => { key => 'age', type => 'num' }
5522         );
5523         my $oi = $order_info{$order};
5524         return @$projlist unless defined $oi;
5525         if ($oi->{'type'} eq 'str') {
5526                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5527         } else {
5528                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5529         }
5530
5531         return @projects;
5532 }
5533
5534 # returns a hash of categories, containing the list of project
5535 # belonging to each category
5536 sub build_projlist_by_category {
5537         my ($projlist, $from, $to) = @_;
5538         my %categories;
5539
5540         $from = 0 unless defined $from;
5541         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5542
5543         for (my $i = $from; $i <= $to; $i++) {
5544                 my $pr = $projlist->[$i];
5545                 push @{$categories{ $pr->{'category'} }}, $pr;
5546         }
5547
5548         return wantarray ? %categories : \%categories;
5549 }
5550
5551 # print 'sort by' <th> element, generating 'sort by $name' replay link
5552 # if that order is not selected
5553 sub print_sort_th {
5554         print format_sort_th(@_);
5555 }
5556
5557 sub format_sort_th {
5558         my ($name, $order, $header) = @_;
5559         my $sort_th = "";
5560         $header ||= ucfirst($name);
5561
5562         if ($order eq $name) {
5563                 $sort_th .= "<th>$header</th>\n";
5564         } else {
5565                 $sort_th .= "<th>" .
5566                             $cgi->a({-href => href(-replay=>1, order=>$name),
5567                                      -class => "header"}, $header) .
5568                             "</th>\n";
5569         }
5570
5571         return $sort_th;
5572 }
5573
5574 sub git_project_list_rows {
5575         my ($projlist, $from, $to, $check_forks) = @_;
5576
5577         $from = 0 unless defined $from;
5578         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5579
5580         my $alternate = 1;
5581         for (my $i = $from; $i <= $to; $i++) {
5582                 my $pr = $projlist->[$i];
5583
5584                 if ($alternate) {
5585                         print "<tr class=\"dark\">\n";
5586                 } else {
5587                         print "<tr class=\"light\">\n";
5588                 }
5589                 $alternate ^= 1;
5590
5591                 if ($check_forks) {
5592                         print "<td>";
5593                         if ($pr->{'forks'}) {
5594                                 my $nforks = scalar @{$pr->{'forks'}};
5595                                 if ($nforks > 0) {
5596                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5597                                                        -title => "$nforks forks"}, "+");
5598                                 } else {
5599                                         print $cgi->span({-title => "$nforks forks"}, "+");
5600                                 }
5601                         }
5602                         print "</td>\n";
5603                 }
5604                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5605                                         -class => "list"},
5606                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5607                       "</td>\n" .
5608                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5609                                         -class => "list",
5610                                         -title => $pr->{'descr_long'}},
5611                                         $search_regexp
5612                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5613                                                                     $pr->{'descr'}, $search_regexp)
5614                                         : esc_html($pr->{'descr'})) .
5615                       "</td>\n";
5616                 unless ($omit_owner) {
5617                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5618                 }
5619                 unless ($omit_age_column) {
5620                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5621                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5622                 }
5623                 print"<td class=\"link\">" .
5624                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5625                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5626                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5627                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5628                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5629                       "</td>\n" .
5630                       "</tr>\n";
5631         }
5632 }
5633
5634 sub git_project_list_body {
5635         # actually uses global variable $project
5636         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5637         my @projects = @$projlist;
5638
5639         my $check_forks = gitweb_check_feature('forks');
5640         my $show_ctags  = gitweb_check_feature('ctags');
5641         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5642         $check_forks = undef
5643                 if ($tagfilter || $search_regexp);
5644
5645         # filtering out forks before filling info allows to do less work
5646         @projects = filter_forks_from_projects_list(\@projects)
5647                 if ($check_forks);
5648         # search_projects_list pre-fills required info
5649         @projects = search_projects_list(\@projects,
5650                                          'search_regexp' => $search_regexp,
5651                                          'tagfilter'  => $tagfilter)
5652                 if ($tagfilter || $search_regexp);
5653         # fill the rest
5654         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5655         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5656         push @all_fields, 'owner' unless($omit_owner);
5657         @projects = fill_project_list_info(\@projects, @all_fields);
5658
5659         $order ||= $default_projects_order;
5660         $from = 0 unless defined $from;
5661         $to = $#projects if (!defined $to || $#projects < $to);
5662
5663         # short circuit
5664         if ($from > $to) {
5665                 print "<center>\n".
5666                       "<b>No such projects found</b><br />\n".
5667                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5668                       "</center>\n<br />\n";
5669                 return;
5670         }
5671
5672         @projects = sort_projects_list(\@projects, $order);
5673
5674         if ($show_ctags) {
5675                 my $ctags = git_gather_all_ctags(\@projects);
5676                 my $cloud = git_populate_project_tagcloud($ctags);
5677                 print git_show_project_tagcloud($cloud, 64);
5678         }
5679
5680         print "<table class=\"project_list\">\n";
5681         unless ($no_header) {
5682                 print "<tr>\n";
5683                 if ($check_forks) {
5684                         print "<th></th>\n";
5685                 }
5686                 print_sort_th('project', $order, 'Project');
5687                 print_sort_th('descr', $order, 'Description');
5688                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5689                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5690                 print "<th></th>\n" . # for links
5691                       "</tr>\n";
5692         }
5693
5694         if ($projects_list_group_categories) {
5695                 # only display categories with projects in the $from-$to window
5696                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5697                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5698                 foreach my $cat (sort keys %categories) {
5699                         unless ($cat eq "") {
5700                                 print "<tr>\n";
5701                                 if ($check_forks) {
5702                                         print "<td></td>\n";
5703                                 }
5704                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5705                                 print "</tr>\n";
5706                         }
5707
5708                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5709                 }
5710         } else {
5711                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5712         }
5713
5714         if (defined $extra) {
5715                 print "<tr>\n";
5716                 if ($check_forks) {
5717                         print "<td></td>\n";
5718                 }
5719                 print "<td colspan=\"5\">$extra</td>\n" .
5720                       "</tr>\n";
5721         }
5722         print "</table>\n";
5723 }
5724
5725 sub git_log_body {
5726         # uses global variable $project
5727         my ($commitlist, $from, $to, $refs, $extra) = @_;
5728
5729         $from = 0 unless defined $from;
5730         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5731
5732         for (my $i = 0; $i <= $to; $i++) {
5733                 my %co = %{$commitlist->[$i]};
5734                 next if !%co;
5735                 my $commit = $co{'id'};
5736                 my $ref = format_ref_marker($refs, $commit);
5737                 git_print_header_div('commit',
5738                                "<span class=\"age\">$co{'age_string'}</span>" .
5739                                esc_html($co{'title'}) . $ref,
5740                                $commit);
5741                 print "<div class=\"title_text\">\n" .
5742                       "<div class=\"log_link\">\n" .
5743                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5744                       " | " .
5745                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5746                       " | " .
5747                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5748                       "<br/>\n" .
5749                       "</div>\n";
5750                       git_print_authorship(\%co, -tag => 'span');
5751                       print "<br/>\n</div>\n";
5752
5753                 print "<div class=\"log_body\">\n";
5754                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5755                 print "</div>\n";
5756         }
5757         if ($extra) {
5758                 print "<div class=\"page_nav\">\n";
5759                 print "$extra\n";
5760                 print "</div>\n";
5761         }
5762 }
5763
5764 sub git_shortlog_body {
5765         # uses global variable $project
5766         my ($commitlist, $from, $to, $refs, $extra) = @_;
5767
5768         $from = 0 unless defined $from;
5769         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5770
5771         print "<table class=\"shortlog\">\n";
5772         my $alternate = 1;
5773         for (my $i = $from; $i <= $to; $i++) {
5774                 my %co = %{$commitlist->[$i]};
5775                 my $commit = $co{'id'};
5776                 my $ref = format_ref_marker($refs, $commit);
5777                 if ($alternate) {
5778                         print "<tr class=\"dark\">\n";
5779                 } else {
5780                         print "<tr class=\"light\">\n";
5781                 }
5782                 $alternate ^= 1;
5783                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5784                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5785                       format_author_html('td', \%co, 10) . "<td>";
5786                 print format_subject_html($co{'title'}, $co{'title_short'},
5787                                           href(action=>"commit", hash=>$commit), $ref);
5788                 print "</td>\n" .
5789                       "<td class=\"link\">" .
5790                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5791                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5792                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5793                 my $snapshot_links = format_snapshot_links($commit);
5794                 if (defined $snapshot_links) {
5795                         print " | " . $snapshot_links;
5796                 }
5797                 print "</td>\n" .
5798                       "</tr>\n";
5799         }
5800         if (defined $extra) {
5801                 print "<tr>\n" .
5802                       "<td colspan=\"4\">$extra</td>\n" .
5803                       "</tr>\n";
5804         }
5805         print "</table>\n";
5806 }
5807
5808 sub git_history_body {
5809         # Warning: assumes constant type (blob or tree) during history
5810         my ($commitlist, $from, $to, $refs, $extra,
5811             $file_name, $file_hash, $ftype) = @_;
5812
5813         $from = 0 unless defined $from;
5814         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5815
5816         print "<table class=\"history\">\n";
5817         my $alternate = 1;
5818         for (my $i = $from; $i <= $to; $i++) {
5819                 my %co = %{$commitlist->[$i]};
5820                 if (!%co) {
5821                         next;
5822                 }
5823                 my $commit = $co{'id'};
5824
5825                 my $ref = format_ref_marker($refs, $commit);
5826
5827                 if ($alternate) {
5828                         print "<tr class=\"dark\">\n";
5829                 } else {
5830                         print "<tr class=\"light\">\n";
5831                 }
5832                 $alternate ^= 1;
5833                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5834         # shortlog:   format_author_html('td', \%co, 10)
5835                       format_author_html('td', \%co, 15, 3) . "<td>";
5836                 # originally git_history used chop_str($co{'title'}, 50)
5837                 print format_subject_html($co{'title'}, $co{'title_short'},
5838                                           href(action=>"commit", hash=>$commit), $ref);
5839                 print "</td>\n" .
5840                       "<td class=\"link\">" .
5841                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5842                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5843
5844                 if ($ftype eq 'blob') {
5845                         my $blob_current = $file_hash;
5846                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5847                         if (defined $blob_current && defined $blob_parent &&
5848                                         $blob_current ne $blob_parent) {
5849                                 print " | " .
5850                                         $cgi->a({-href => href(action=>"blobdiff",
5851                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5852                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5853                                                                file_name=>$file_name)},
5854                                                 "diff to current");
5855                         }
5856                 }
5857                 print "</td>\n" .
5858                       "</tr>\n";
5859         }
5860         if (defined $extra) {
5861                 print "<tr>\n" .
5862                       "<td colspan=\"4\">$extra</td>\n" .
5863                       "</tr>\n";
5864         }
5865         print "</table>\n";
5866 }
5867
5868 sub git_tags_body {
5869         # uses global variable $project
5870         my ($taglist, $from, $to, $extra) = @_;
5871         $from = 0 unless defined $from;
5872         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5873
5874         print "<table class=\"tags\">\n";
5875         my $alternate = 1;
5876         for (my $i = $from; $i <= $to; $i++) {
5877                 my $entry = $taglist->[$i];
5878                 my %tag = %$entry;
5879                 my $comment = $tag{'subject'};
5880                 my $comment_short;
5881                 if (defined $comment) {
5882                         $comment_short = chop_str($comment, 30, 5);
5883                 }
5884                 if ($alternate) {
5885                         print "<tr class=\"dark\">\n";
5886                 } else {
5887                         print "<tr class=\"light\">\n";
5888                 }
5889                 $alternate ^= 1;
5890                 if (defined $tag{'age'}) {
5891                         print "<td><i>$tag{'age'}</i></td>\n";
5892                 } else {
5893                         print "<td></td>\n";
5894                 }
5895                 print "<td>" .
5896                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5897                                -class => "list name"}, esc_html($tag{'name'})) .
5898                       "</td>\n" .
5899                       "<td>";
5900                 if (defined $comment) {
5901                         print format_subject_html($comment, $comment_short,
5902                                                   href(action=>"tag", hash=>$tag{'id'}));
5903                 }
5904                 print "</td>\n" .
5905                       "<td class=\"selflink\">";
5906                 if ($tag{'type'} eq "tag") {
5907                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5908                 } else {
5909                         print "&nbsp;";
5910                 }
5911                 print "</td>\n" .
5912                       "<td class=\"link\">" . " | " .
5913                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5914                 if ($tag{'reftype'} eq "commit") {
5915                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5916                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5917                 } elsif ($tag{'reftype'} eq "blob") {
5918                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5919                 }
5920                 print "</td>\n" .
5921                       "</tr>";
5922         }
5923         if (defined $extra) {
5924                 print "<tr>\n" .
5925                       "<td colspan=\"5\">$extra</td>\n" .
5926                       "</tr>\n";
5927         }
5928         print "</table>\n";
5929 }
5930
5931 sub git_heads_body {
5932         # uses global variable $project
5933         my ($headlist, $head_at, $from, $to, $extra) = @_;
5934         $from = 0 unless defined $from;
5935         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5936
5937         print "<table class=\"heads\">\n";
5938         my $alternate = 1;
5939         for (my $i = $from; $i <= $to; $i++) {
5940                 my $entry = $headlist->[$i];
5941                 my %ref = %$entry;
5942                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5943                 if ($alternate) {
5944                         print "<tr class=\"dark\">\n";
5945                 } else {
5946                         print "<tr class=\"light\">\n";
5947                 }
5948                 $alternate ^= 1;
5949                 print "<td><i>$ref{'age'}</i></td>\n" .
5950                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5951                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5952                                -class => "list name"},esc_html($ref{'name'})) .
5953                       "</td>\n" .
5954                       "<td class=\"link\">" .
5955                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5956                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5957                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5958                       "</td>\n" .
5959                       "</tr>";
5960         }
5961         if (defined $extra) {
5962                 print "<tr>\n" .
5963                       "<td colspan=\"3\">$extra</td>\n" .
5964                       "</tr>\n";
5965         }
5966         print "</table>\n";
5967 }
5968
5969 # Display a single remote block
5970 sub git_remote_block {
5971         my ($remote, $rdata, $limit, $head) = @_;
5972
5973         my $heads = $rdata->{'heads'};
5974         my $fetch = $rdata->{'fetch'};
5975         my $push = $rdata->{'push'};
5976
5977         my $urls_table = "<table class=\"projects_list\">\n" ;
5978
5979         if (defined $fetch) {
5980                 if ($fetch eq $push) {
5981                         $urls_table .= format_repo_url("URL", $fetch);
5982                 } else {
5983                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5984                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5985                 }
5986         } elsif (defined $push) {
5987                 $urls_table .= format_repo_url("Push URL", $push);
5988         } else {
5989                 $urls_table .= format_repo_url("", "No remote URL");
5990         }
5991
5992         $urls_table .= "</table>\n";
5993
5994         my $dots;
5995         if (defined $limit && $limit < @$heads) {
5996                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5997         }
5998
5999         print $urls_table;
6000         git_heads_body($heads, $head, 0, $limit, $dots);
6001 }
6002
6003 # Display a list of remote names with the respective fetch and push URLs
6004 sub git_remotes_list {
6005         my ($remotedata, $limit) = @_;
6006         print "<table class=\"heads\">\n";
6007         my $alternate = 1;
6008         my @remotes = sort keys %$remotedata;
6009
6010         my $limited = $limit && $limit < @remotes;
6011
6012         $#remotes = $limit - 1 if $limited;
6013
6014         while (my $remote = shift @remotes) {
6015                 my $rdata = $remotedata->{$remote};
6016                 my $fetch = $rdata->{'fetch'};
6017                 my $push = $rdata->{'push'};
6018                 if ($alternate) {
6019                         print "<tr class=\"dark\">\n";
6020                 } else {
6021                         print "<tr class=\"light\">\n";
6022                 }
6023                 $alternate ^= 1;
6024                 print "<td>" .
6025                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6026                                -class=> "list name"},esc_html($remote)) .
6027                       "</td>";
6028                 print "<td class=\"link\">" .
6029                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6030                       " | " .
6031                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6032                       "</td>";
6033
6034                 print "</tr>\n";
6035         }
6036
6037         if ($limited) {
6038                 print "<tr>\n" .
6039                       "<td colspan=\"3\">" .
6040                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6041                       "</td>\n" . "</tr>\n";
6042         }
6043
6044         print "</table>";
6045 }
6046
6047 # Display remote heads grouped by remote, unless there are too many
6048 # remotes, in which case we only display the remote names
6049 sub git_remotes_body {
6050         my ($remotedata, $limit, $head) = @_;
6051         if ($limit and $limit < keys %$remotedata) {
6052                 git_remotes_list($remotedata, $limit);
6053         } else {
6054                 fill_remote_heads($remotedata);
6055                 while (my ($remote, $rdata) = each %$remotedata) {
6056                         git_print_section({-class=>"remote", -id=>$remote},
6057                                 ["remotes", $remote, $remote], sub {
6058                                         git_remote_block($remote, $rdata, $limit, $head);
6059                                 });
6060                 }
6061         }
6062 }
6063
6064 sub git_search_message {
6065         my %co = @_;
6066
6067         my $greptype;
6068         if ($searchtype eq 'commit') {
6069                 $greptype = "--grep=";
6070         } elsif ($searchtype eq 'author') {
6071                 $greptype = "--author=";
6072         } elsif ($searchtype eq 'committer') {
6073                 $greptype = "--committer=";
6074         }
6075         $greptype .= $searchtext;
6076         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6077                                        $greptype, '--regexp-ignore-case',
6078                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6079
6080         my $paging_nav = '';
6081         if ($page > 0) {
6082                 $paging_nav .=
6083                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6084                                 "first") .
6085                         " &sdot; " .
6086                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6087                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6088         } else {
6089                 $paging_nav .= "first &sdot; prev";
6090         }
6091         my $next_link = '';
6092         if ($#commitlist >= 100) {
6093                 $next_link =
6094                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6095                                  -accesskey => "n", -title => "Alt-n"}, "next");
6096                 $paging_nav .= " &sdot; $next_link";
6097         } else {
6098                 $paging_nav .= " &sdot; next";
6099         }
6100
6101         git_header_html();
6102
6103         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6104         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6105         if ($page == 0 && !@commitlist) {
6106                 print "<p>No match.</p>\n";
6107         } else {
6108                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6109         }
6110
6111         git_footer_html();
6112 }
6113
6114 sub git_search_changes {
6115         my %co = @_;
6116
6117         local $/ = "\n";
6118         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6119                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6120                 ($search_use_regexp ? '--pickaxe-regex' : ())
6121                         or die_error(500, "Open git-log failed");
6122
6123         git_header_html();
6124
6125         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6126         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6127
6128         print "<table class=\"pickaxe search\">\n";
6129         my $alternate = 1;
6130         undef %co;
6131         my @files;
6132         while (my $line = <$fd>) {
6133                 chomp $line;
6134                 next unless $line;
6135
6136                 my %set = parse_difftree_raw_line($line);
6137                 if (defined $set{'commit'}) {
6138                         # finish previous commit
6139                         if (%co) {
6140                                 print "</td>\n" .
6141                                       "<td class=\"link\">" .
6142                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6143                                               "commit") .
6144                                       " | " .
6145                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6146                                                              hash_base=>$co{'id'})},
6147                                               "tree") .
6148                                       "</td>\n" .
6149                                       "</tr>\n";
6150                         }
6151
6152                         if ($alternate) {
6153                                 print "<tr class=\"dark\">\n";
6154                         } else {
6155                                 print "<tr class=\"light\">\n";
6156                         }
6157                         $alternate ^= 1;
6158                         %co = parse_commit($set{'commit'});
6159                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6160                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6161                               "<td><i>$author</i></td>\n" .
6162                               "<td>" .
6163                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6164                                       -class => "list subject"},
6165                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6166                 } elsif (defined $set{'to_id'}) {
6167                         next if ($set{'to_id'} =~ m/^0{40}$/);
6168
6169                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6170                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6171                                       -class => "list"},
6172                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6173                               "<br/>\n";
6174                 }
6175         }
6176         close $fd;
6177
6178         # finish last commit (warning: repetition!)
6179         if (%co) {
6180                 print "</td>\n" .
6181                       "<td class=\"link\">" .
6182                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6183                               "commit") .
6184                       " | " .
6185                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6186                                              hash_base=>$co{'id'})},
6187                               "tree") .
6188                       "</td>\n" .
6189                       "</tr>\n";
6190         }
6191
6192         print "</table>\n";
6193
6194         git_footer_html();
6195 }
6196
6197 sub git_search_files {
6198         my %co = @_;
6199
6200         local $/ = "\n";
6201         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6202                 $search_use_regexp ? ('-E', '-i') : '-F',
6203                 $searchtext, $co{'tree'}
6204                         or die_error(500, "Open git-grep failed");
6205
6206         git_header_html();
6207
6208         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6209         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6210
6211         print "<table class=\"grep_search\">\n";
6212         my $alternate = 1;
6213         my $matches = 0;
6214         my $lastfile = '';
6215         my $file_href;
6216         while (my $line = <$fd>) {
6217                 chomp $line;
6218                 my ($file, $lno, $ltext, $binary);
6219                 last if ($matches++ > 1000);
6220                 if ($line =~ /^Binary file (.+) matches$/) {
6221                         $file = $1;
6222                         $binary = 1;
6223                 } else {
6224                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6225                         $file =~ s/^$co{'tree'}://;
6226                 }
6227                 if ($file ne $lastfile) {
6228                         $lastfile and print "</td></tr>\n";
6229                         if ($alternate++) {
6230                                 print "<tr class=\"dark\">\n";
6231                         } else {
6232                                 print "<tr class=\"light\">\n";
6233                         }
6234                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6235                                           file_name=>$file);
6236                         print "<td class=\"list\">".
6237                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6238                         print "</td><td>\n";
6239                         $lastfile = $file;
6240                 }
6241                 if ($binary) {
6242                         print "<div class=\"binary\">Binary file</div>\n";
6243                 } else {
6244                         $ltext = untabify($ltext);
6245                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6246                                 $ltext = esc_html($1, -nbsp=>1);
6247                                 $ltext .= '<span class="match">';
6248                                 $ltext .= esc_html($2, -nbsp=>1);
6249                                 $ltext .= '</span>';
6250                                 $ltext .= esc_html($3, -nbsp=>1);
6251                         } else {
6252                                 $ltext = esc_html($ltext, -nbsp=>1);
6253                         }
6254                         print "<div class=\"pre\">" .
6255                                 $cgi->a({-href => $file_href.'#l'.$lno,
6256                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6257                                 ' ' .  $ltext . "</div>\n";
6258                 }
6259         }
6260         if ($lastfile) {
6261                 print "</td></tr>\n";
6262                 if ($matches > 1000) {
6263                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6264                 }
6265         } else {
6266                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6267         }
6268         close $fd;
6269
6270         print "</table>\n";
6271
6272         git_footer_html();
6273 }
6274
6275 sub git_search_grep_body {
6276         my ($commitlist, $from, $to, $extra) = @_;
6277         $from = 0 unless defined $from;
6278         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6279
6280         print "<table class=\"commit_search\">\n";
6281         my $alternate = 1;
6282         for (my $i = $from; $i <= $to; $i++) {
6283                 my %co = %{$commitlist->[$i]};
6284                 if (!%co) {
6285                         next;
6286                 }
6287                 my $commit = $co{'id'};
6288                 if ($alternate) {
6289                         print "<tr class=\"dark\">\n";
6290                 } else {
6291                         print "<tr class=\"light\">\n";
6292                 }
6293                 $alternate ^= 1;
6294                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6295                       format_author_html('td', \%co, 15, 5) .
6296                       "<td>" .
6297                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6298                                -class => "list subject"},
6299                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6300                 my $comment = $co{'comment'};
6301                 foreach my $line (@$comment) {
6302                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6303                                 my ($lead, $match, $trail) = ($1, $2, $3);
6304                                 $match = chop_str($match, 70, 5, 'center');
6305                                 my $contextlen = int((80 - length($match))/2);
6306                                 $contextlen = 30 if ($contextlen > 30);
6307                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6308                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6309
6310                                 $lead  = esc_html($lead);
6311                                 $match = esc_html($match);
6312                                 $trail = esc_html($trail);
6313
6314                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6315                         }
6316                 }
6317                 print "</td>\n" .
6318                       "<td class=\"link\">" .
6319                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6320                       " | " .
6321                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6322                       " | " .
6323                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6324                 print "</td>\n" .
6325                       "</tr>\n";
6326         }
6327         if (defined $extra) {
6328                 print "<tr>\n" .
6329                       "<td colspan=\"3\">$extra</td>\n" .
6330                       "</tr>\n";
6331         }
6332         print "</table>\n";
6333 }
6334
6335 ## ======================================================================
6336 ## ======================================================================
6337 ## actions
6338
6339 sub git_project_list {
6340         my $order = $input_params{'order'};
6341         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6342                 die_error(400, "Unknown order parameter");
6343         }
6344
6345         my @list = git_get_projects_list($project_filter, $strict_export);
6346         if (!@list) {
6347                 die_error(404, "No projects found");
6348         }
6349
6350         git_header_html();
6351         if (defined $home_text && -f $home_text) {
6352                 print "<div class=\"index_include\">\n";
6353                 insert_file($home_text);
6354                 print "</div>\n";
6355         }
6356
6357         git_project_search_form($searchtext, $search_use_regexp);
6358         git_project_list_body(\@list, $order);
6359         git_footer_html();
6360 }
6361
6362 sub git_forks {
6363         my $order = $input_params{'order'};
6364         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6365                 die_error(400, "Unknown order parameter");
6366         }
6367
6368         my $filter = $project;
6369         $filter =~ s/\.git$//;
6370         my @list = git_get_projects_list($filter);
6371         if (!@list) {
6372                 die_error(404, "No forks found");
6373         }
6374
6375         git_header_html();
6376         git_print_page_nav('','');
6377         git_print_header_div('summary', "$project forks");
6378         git_project_list_body(\@list, $order);
6379         git_footer_html();
6380 }
6381
6382 sub git_project_index {
6383         my @projects = git_get_projects_list($project_filter, $strict_export);
6384         if (!@projects) {
6385                 die_error(404, "No projects found");
6386         }
6387
6388         print $cgi->header(
6389                 -type => 'text/plain',
6390                 -charset => 'utf-8',
6391                 -content_disposition => 'inline; filename="index.aux"');
6392
6393         foreach my $pr (@projects) {
6394                 if (!exists $pr->{'owner'}) {
6395                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6396                 }
6397
6398                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6399                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6400                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6401                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6402                 $path  =~ s/ /\+/g;
6403                 $owner =~ s/ /\+/g;
6404
6405                 print "$path $owner\n";
6406         }
6407 }
6408
6409 sub git_summary {
6410         my $descr = git_get_project_description($project) || "none";
6411         my %co = parse_commit("HEAD");
6412         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6413         my $head = $co{'id'};
6414         my $remote_heads = gitweb_check_feature('remote_heads');
6415
6416         my $owner = git_get_project_owner($project);
6417
6418         my $refs = git_get_references();
6419         # These get_*_list functions return one more to allow us to see if
6420         # there are more ...
6421         my @taglist  = git_get_tags_list(16);
6422         my @headlist = git_get_heads_list(16);
6423         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6424         my @forklist;
6425         my $check_forks = gitweb_check_feature('forks');
6426
6427         if ($check_forks) {
6428                 # find forks of a project
6429                 my $filter = $project;
6430                 $filter =~ s/\.git$//;
6431                 @forklist = git_get_projects_list($filter);
6432                 # filter out forks of forks
6433                 @forklist = filter_forks_from_projects_list(\@forklist)
6434                         if (@forklist);
6435         }
6436
6437         git_header_html();
6438         git_print_page_nav('summary','', $head);
6439
6440         print "<div class=\"title\">&nbsp;</div>\n";
6441         print "<table class=\"projects_list\">\n" .
6442               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6443         unless ($omit_owner) {
6444                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6445         }
6446         if (defined $cd{'rfc2822'}) {
6447                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6448                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6449         }
6450
6451         # use per project git URL list in $projectroot/$project/cloneurl
6452         # or make project git URL from git base URL and project name
6453         my $url_tag = "URL";
6454         my @url_list = git_get_project_url_list($project);
6455         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6456         foreach my $git_url (@url_list) {
6457                 next unless $git_url;
6458                 print format_repo_url($url_tag, $git_url);
6459                 $url_tag = "";
6460         }
6461
6462         # Tag cloud
6463         my $show_ctags = gitweb_check_feature('ctags');
6464         if ($show_ctags) {
6465                 my $ctags = git_get_project_ctags($project);
6466                 if (%$ctags) {
6467                         # without ability to add tags, don't show if there are none
6468                         my $cloud = git_populate_project_tagcloud($ctags);
6469                         print "<tr id=\"metadata_ctags\">" .
6470                               "<td>content tags</td>" .
6471                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6472                               "</tr>\n";
6473                 }
6474         }
6475
6476         print "</table>\n";
6477
6478         # If XSS prevention is on, we don't include README.html.
6479         # TODO: Allow a readme in some safe format.
6480         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6481                 print "<div class=\"title\">readme</div>\n" .
6482                       "<div class=\"readme\">\n";
6483                 insert_file("$projectroot/$project/README.html");
6484                 print "\n</div>\n"; # class="readme"
6485         }
6486
6487         # we need to request one more than 16 (0..15) to check if
6488         # those 16 are all
6489         my @commitlist = $head ? parse_commits($head, 17) : ();
6490         if (@commitlist) {
6491                 git_print_header_div('shortlog');
6492                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6493                                   $#commitlist <=  15 ? undef :
6494                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6495         }
6496
6497         if (@taglist) {
6498                 git_print_header_div('tags');
6499                 git_tags_body(\@taglist, 0, 15,
6500                               $#taglist <=  15 ? undef :
6501                               $cgi->a({-href => href(action=>"tags")}, "..."));
6502         }
6503
6504         if (@headlist) {
6505                 git_print_header_div('heads');
6506                 git_heads_body(\@headlist, $head, 0, 15,
6507                                $#headlist <= 15 ? undef :
6508                                $cgi->a({-href => href(action=>"heads")}, "..."));
6509         }
6510
6511         if (%remotedata) {
6512                 git_print_header_div('remotes');
6513                 git_remotes_body(\%remotedata, 15, $head);
6514         }
6515
6516         if (@forklist) {
6517                 git_print_header_div('forks');
6518                 git_project_list_body(\@forklist, 'age', 0, 15,
6519                                       $#forklist <= 15 ? undef :
6520                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6521                                       'no_header');
6522         }
6523
6524         git_footer_html();
6525 }
6526
6527 sub git_tag {
6528         my %tag = parse_tag($hash);
6529
6530         if (! %tag) {
6531                 die_error(404, "Unknown tag object");
6532         }
6533
6534         my $head = git_get_head_hash($project);
6535         git_header_html();
6536         git_print_page_nav('','', $head,undef,$head);
6537         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6538         print "<div class=\"title_text\">\n" .
6539               "<table class=\"object_header\">\n" .
6540               "<tr>\n" .
6541               "<td>object</td>\n" .
6542               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6543                                $tag{'object'}) . "</td>\n" .
6544               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6545                                               $tag{'type'}) . "</td>\n" .
6546               "</tr>\n";
6547         if (defined($tag{'author'})) {
6548                 git_print_authorship_rows(\%tag, 'author');
6549         }
6550         print "</table>\n\n" .
6551               "</div>\n";
6552         print "<div class=\"page_body\">";
6553         my $comment = $tag{'comment'};
6554         foreach my $line (@$comment) {
6555                 chomp $line;
6556                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6557         }
6558         print "</div>\n";
6559         git_footer_html();
6560 }
6561
6562 sub git_blame_common {
6563         my $format = shift || 'porcelain';
6564         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6565                 $format = 'incremental';
6566                 $action = 'blame_incremental'; # for page title etc
6567         }
6568
6569         # permissions
6570         gitweb_check_feature('blame')
6571                 or die_error(403, "Blame view not allowed");
6572
6573         # error checking
6574         die_error(400, "No file name given") unless $file_name;
6575         $hash_base ||= git_get_head_hash($project);
6576         die_error(404, "Couldn't find base commit") unless $hash_base;
6577         my %co = parse_commit($hash_base)
6578                 or die_error(404, "Commit not found");
6579         my $ftype = "blob";
6580         if (!defined $hash) {
6581                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6582                         or die_error(404, "Error looking up file");
6583         } else {
6584                 $ftype = git_get_type($hash);
6585                 if ($ftype !~ "blob") {
6586                         die_error(400, "Object is not a blob");
6587                 }
6588         }
6589
6590         my $fd;
6591         if ($format eq 'incremental') {
6592                 # get file contents (as base)
6593                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6594                         or die_error(500, "Open git-cat-file failed");
6595         } elsif ($format eq 'data') {
6596                 # run git-blame --incremental
6597                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6598                         $hash_base, "--", $file_name
6599                         or die_error(500, "Open git-blame --incremental failed");
6600         } else {
6601                 # run git-blame --porcelain
6602                 open $fd, "-|", git_cmd(), "blame", '-p',
6603                         $hash_base, '--', $file_name
6604                         or die_error(500, "Open git-blame --porcelain failed");
6605         }
6606
6607         # incremental blame data returns early
6608         if ($format eq 'data') {
6609                 print $cgi->header(
6610                         -type=>"text/plain", -charset => "utf-8",
6611                         -status=> "200 OK");
6612                 local $| = 1; # output autoflush
6613                 while (my $line = <$fd>) {
6614                         print to_utf8($line);
6615                 }
6616                 close $fd
6617                         or print "ERROR $!\n";
6618
6619                 print 'END';
6620                 if (defined $t0 && gitweb_check_feature('timed')) {
6621                         print ' '.
6622                               tv_interval($t0, [ gettimeofday() ]).
6623                               ' '.$number_of_git_cmds;
6624                 }
6625                 print "\n";
6626
6627                 return;
6628         }
6629
6630         # page header
6631         git_header_html();
6632         my $formats_nav =
6633                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6634                         "blob") .
6635                 " | ";
6636         if ($format eq 'incremental') {
6637                 $formats_nav .=
6638                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6639                                 "blame") . " (non-incremental)";
6640         } else {
6641                 $formats_nav .=
6642                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6643                                 "blame") . " (incremental)";
6644         }
6645         $formats_nav .=
6646                 " | " .
6647                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6648                         "history") .
6649                 " | " .
6650                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6651                         "HEAD");
6652         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6653         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6654         git_print_page_path($file_name, $ftype, $hash_base);
6655
6656         # page body
6657         if ($format eq 'incremental') {
6658                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6659                       "This page requires JavaScript to run.\n Use ".
6660                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6661                               'this page').
6662                       " instead.\n".
6663                       "</b></center></div>\n</noscript>\n";
6664
6665                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6666         }
6667
6668         print qq!<div class="page_body">\n!;
6669         print qq!<div id="progress_info">... / ...</div>\n!
6670                 if ($format eq 'incremental');
6671         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6672               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6673               qq!<thead>\n!.
6674               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6675               qq!</thead>\n!.
6676               qq!<tbody>\n!;
6677
6678         my @rev_color = qw(light dark);
6679         my $num_colors = scalar(@rev_color);
6680         my $current_color = 0;
6681
6682         if ($format eq 'incremental') {
6683                 my $color_class = $rev_color[$current_color];
6684
6685                 #contents of a file
6686                 my $linenr = 0;
6687         LINE:
6688                 while (my $line = <$fd>) {
6689                         chomp $line;
6690                         $linenr++;
6691
6692                         print qq!<tr id="l$linenr" class="$color_class">!.
6693                               qq!<td class="sha1"><a href=""> </a></td>!.
6694                               qq!<td class="linenr">!.
6695                               qq!<a class="linenr" href="">$linenr</a></td>!;
6696                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6697                         print qq!</tr>\n!;
6698                 }
6699
6700         } else { # porcelain, i.e. ordinary blame
6701                 my %metainfo = (); # saves information about commits
6702
6703                 # blame data
6704         LINE:
6705                 while (my $line = <$fd>) {
6706                         chomp $line;
6707                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6708                         # no <lines in group> for subsequent lines in group of lines
6709                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6710                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6711                         if (!exists $metainfo{$full_rev}) {
6712                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6713                         }
6714                         my $meta = $metainfo{$full_rev};
6715                         my $data;
6716                         while ($data = <$fd>) {
6717                                 chomp $data;
6718                                 last if ($data =~ s/^\t//); # contents of line
6719                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6720                                         $meta->{$1} = $2 unless exists $meta->{$1};
6721                                 }
6722                                 if ($data =~ /^previous /) {
6723                                         $meta->{'nprevious'}++;
6724                                 }
6725                         }
6726                         my $short_rev = substr($full_rev, 0, 8);
6727                         my $author = $meta->{'author'};
6728                         my %date =
6729                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6730                         my $date = $date{'iso-tz'};
6731                         if ($group_size) {
6732                                 $current_color = ($current_color + 1) % $num_colors;
6733                         }
6734                         my $tr_class = $rev_color[$current_color];
6735                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6736                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6737                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6738                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6739                         if ($group_size) {
6740                                 print "<td class=\"sha1\"";
6741                                 print " title=\"". esc_html($author) . ", $date\"";
6742                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6743                                 print ">";
6744                                 print $cgi->a({-href => href(action=>"commit",
6745                                                              hash=>$full_rev,
6746                                                              file_name=>$file_name)},
6747                                               esc_html($short_rev));
6748                                 if ($group_size >= 2) {
6749                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6750                                         if (@author_initials) {
6751                                                 print "<br />" .
6752                                                       esc_html(join('', @author_initials));
6753                                                 #           or join('.', ...)
6754                                         }
6755                                 }
6756                                 print "</td>\n";
6757                         }
6758                         # 'previous' <sha1 of parent commit> <filename at commit>
6759                         if (exists $meta->{'previous'} &&
6760                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6761                                 $meta->{'parent'} = $1;
6762                                 $meta->{'file_parent'} = unquote($2);
6763                         }
6764                         my $linenr_commit =
6765                                 exists($meta->{'parent'}) ?
6766                                 $meta->{'parent'} : $full_rev;
6767                         my $linenr_filename =
6768                                 exists($meta->{'file_parent'}) ?
6769                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6770                         my $blamed = href(action => 'blame',
6771                                           file_name => $linenr_filename,
6772                                           hash_base => $linenr_commit);
6773                         print "<td class=\"linenr\">";
6774                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6775                                         -class => "linenr" },
6776                                       esc_html($lineno));
6777                         print "</td>";
6778                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6779                         print "</tr>\n";
6780                 } # end while
6781
6782         }
6783
6784         # footer
6785         print "</tbody>\n".
6786               "</table>\n"; # class="blame"
6787         print "</div>\n";   # class="blame_body"
6788         close $fd
6789                 or print "Reading blob failed\n";
6790
6791         git_footer_html();
6792 }
6793
6794 sub git_blame {
6795         git_blame_common();
6796 }
6797
6798 sub git_blame_incremental {
6799         git_blame_common('incremental');
6800 }
6801
6802 sub git_blame_data {
6803         git_blame_common('data');
6804 }
6805
6806 sub git_tags {
6807         my $head = git_get_head_hash($project);
6808         git_header_html();
6809         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6810         git_print_header_div('summary', $project);
6811
6812         my @tagslist = git_get_tags_list();
6813         if (@tagslist) {
6814                 git_tags_body(\@tagslist);
6815         }
6816         git_footer_html();
6817 }
6818
6819 sub git_heads {
6820         my $head = git_get_head_hash($project);
6821         git_header_html();
6822         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6823         git_print_header_div('summary', $project);
6824
6825         my @headslist = git_get_heads_list();
6826         if (@headslist) {
6827                 git_heads_body(\@headslist, $head);
6828         }
6829         git_footer_html();
6830 }
6831
6832 # used both for single remote view and for list of all the remotes
6833 sub git_remotes {
6834         gitweb_check_feature('remote_heads')
6835                 or die_error(403, "Remote heads view is disabled");
6836
6837         my $head = git_get_head_hash($project);
6838         my $remote = $input_params{'hash'};
6839
6840         my $remotedata = git_get_remotes_list($remote);
6841         die_error(500, "Unable to get remote information") unless defined $remotedata;
6842
6843         unless (%$remotedata) {
6844                 die_error(404, defined $remote ?
6845                         "Remote $remote not found" :
6846                         "No remotes found");
6847         }
6848
6849         git_header_html(undef, undef, -action_extra => $remote);
6850         git_print_page_nav('', '',  $head, undef, $head,
6851                 format_ref_views($remote ? '' : 'remotes'));
6852
6853         fill_remote_heads($remotedata);
6854         if (defined $remote) {
6855                 git_print_header_div('remotes', "$remote remote for $project");
6856                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6857         } else {
6858                 git_print_header_div('summary', "$project remotes");
6859                 git_remotes_body($remotedata, undef, $head);
6860         }
6861
6862         git_footer_html();
6863 }
6864
6865 sub git_blob_plain {
6866         my $type = shift;
6867         my $expires;
6868
6869         if (!defined $hash) {
6870                 if (defined $file_name) {
6871                         my $base = $hash_base || git_get_head_hash($project);
6872                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6873                                 or die_error(404, "Cannot find file");
6874                 } else {
6875                         die_error(400, "No file name defined");
6876                 }
6877         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6878                 # blobs defined by non-textual hash id's can be cached
6879                 $expires = "+1d";
6880         }
6881
6882         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6883                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6884
6885         # content-type (can include charset)
6886         $type = blob_contenttype($fd, $file_name, $type);
6887
6888         # "save as" filename, even when no $file_name is given
6889         my $save_as = "$hash";
6890         if (defined $file_name) {
6891                 $save_as = $file_name;
6892         } elsif ($type =~ m/^text\//) {
6893                 $save_as .= '.txt';
6894         }
6895
6896         # With XSS prevention on, blobs of all types except a few known safe
6897         # ones are served with "Content-Disposition: attachment" to make sure
6898         # they don't run in our security domain.  For certain image types,
6899         # blob view writes an <img> tag referring to blob_plain view, and we
6900         # want to be sure not to break that by serving the image as an
6901         # attachment (though Firefox 3 doesn't seem to care).
6902         my $sandbox = $prevent_xss &&
6903                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6904
6905         # serve text/* as text/plain
6906         if ($prevent_xss &&
6907             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6908              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6909                 my $rest = $1;
6910                 $rest = defined $rest ? $rest : '';
6911                 $type = "text/plain$rest";
6912         }
6913
6914         print $cgi->header(
6915                 -type => $type,
6916                 -expires => $expires,
6917                 -content_disposition =>
6918                         ($sandbox ? 'attachment' : 'inline')
6919                         . '; filename="' . $save_as . '"');
6920         local $/ = undef;
6921         binmode STDOUT, ':raw';
6922         print <$fd>;
6923         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6924         close $fd;
6925 }
6926
6927 sub git_blob {
6928         my $expires;
6929
6930         if (!defined $hash) {
6931                 if (defined $file_name) {
6932                         my $base = $hash_base || git_get_head_hash($project);
6933                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6934                                 or die_error(404, "Cannot find file");
6935                 } else {
6936                         die_error(400, "No file name defined");
6937                 }
6938         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6939                 # blobs defined by non-textual hash id's can be cached
6940                 $expires = "+1d";
6941         }
6942
6943         my $have_blame = gitweb_check_feature('blame');
6944         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6945                 or die_error(500, "Couldn't cat $file_name, $hash");
6946         my $mimetype = blob_mimetype($fd, $file_name);
6947         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6948         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6949                 close $fd;
6950                 return git_blob_plain($mimetype);
6951         }
6952         # we can have blame only for text/* mimetype
6953         $have_blame &&= ($mimetype =~ m!^text/!);
6954
6955         my $highlight = gitweb_check_feature('highlight');
6956         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6957         $fd = run_highlighter($fd, $highlight, $syntax)
6958                 if $syntax;
6959
6960         git_header_html(undef, $expires);
6961         my $formats_nav = '';
6962         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6963                 if (defined $file_name) {
6964                         if ($have_blame) {
6965                                 $formats_nav .=
6966                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6967                                                 "blame") .
6968                                         " | ";
6969                         }
6970                         $formats_nav .=
6971                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6972                                         "history") .
6973                                 " | " .
6974                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6975                                         "raw") .
6976                                 " | " .
6977                                 $cgi->a({-href => href(action=>"blob",
6978                                                        hash_base=>"HEAD", file_name=>$file_name)},
6979                                         "HEAD");
6980                 } else {
6981                         $formats_nav .=
6982                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6983                                         "raw");
6984                 }
6985                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6986                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6987         } else {
6988                 print "<div class=\"page_nav\">\n" .
6989                       "<br/><br/></div>\n" .
6990                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6991         }
6992         git_print_page_path($file_name, "blob", $hash_base);
6993         print "<div class=\"page_body\">\n";
6994         if ($mimetype =~ m!^image/!) {
6995                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6996                 if ($file_name) {
6997                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6998                 }
6999                 print qq! src="! .
7000                       href(action=>"blob_plain", hash=>$hash,
7001                            hash_base=>$hash_base, file_name=>$file_name) .
7002                       qq!" />\n!;
7003         } else {
7004                 my $nr;
7005                 while (my $line = <$fd>) {
7006                         chomp $line;
7007                         $nr++;
7008                         $line = untabify($line);
7009                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7010                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7011                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7012                 }
7013         }
7014         close $fd
7015                 or print "Reading blob failed.\n";
7016         print "</div>";
7017         git_footer_html();
7018 }
7019
7020 sub git_tree {
7021         if (!defined $hash_base) {
7022                 $hash_base = "HEAD";
7023         }
7024         if (!defined $hash) {
7025                 if (defined $file_name) {
7026                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7027                 } else {
7028                         $hash = $hash_base;
7029                 }
7030         }
7031         die_error(404, "No such tree") unless defined($hash);
7032
7033         my $show_sizes = gitweb_check_feature('show-sizes');
7034         my $have_blame = gitweb_check_feature('blame');
7035
7036         my @entries = ();
7037         {
7038                 local $/ = "\0";
7039                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7040                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7041                         or die_error(500, "Open git-ls-tree failed");
7042                 @entries = map { chomp; $_ } <$fd>;
7043                 close $fd
7044                         or die_error(404, "Reading tree failed");
7045         }
7046
7047         my $refs = git_get_references();
7048         my $ref = format_ref_marker($refs, $hash_base);
7049         git_header_html();
7050         my $basedir = '';
7051         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7052                 my @views_nav = ();
7053                 if (defined $file_name) {
7054                         push @views_nav,
7055                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7056                                         "history"),
7057                                 $cgi->a({-href => href(action=>"tree",
7058                                                        hash_base=>"HEAD", file_name=>$file_name)},
7059                                         "HEAD"),
7060                 }
7061                 my $snapshot_links = format_snapshot_links($hash);
7062                 if (defined $snapshot_links) {
7063                         # FIXME: Should be available when we have no hash base as well.
7064                         push @views_nav, $snapshot_links;
7065                 }
7066                 git_print_page_nav('tree','', $hash_base, undef, undef,
7067                                    join(' | ', @views_nav));
7068                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7069         } else {
7070                 undef $hash_base;
7071                 print "<div class=\"page_nav\">\n";
7072                 print "<br/><br/></div>\n";
7073                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7074         }
7075         if (defined $file_name) {
7076                 $basedir = $file_name;
7077                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7078                         $basedir .= '/';
7079                 }
7080                 git_print_page_path($file_name, 'tree', $hash_base);
7081         }
7082         print "<div class=\"page_body\">\n";
7083         print "<table class=\"tree\">\n";
7084         my $alternate = 1;
7085         # '..' (top directory) link if possible
7086         if (defined $hash_base &&
7087             defined $file_name && $file_name =~ m![^/]+$!) {
7088                 if ($alternate) {
7089                         print "<tr class=\"dark\">\n";
7090                 } else {
7091                         print "<tr class=\"light\">\n";
7092                 }
7093                 $alternate ^= 1;
7094
7095                 my $up = $file_name;
7096                 $up =~ s!/?[^/]+$!!;
7097                 undef $up unless $up;
7098                 # based on git_print_tree_entry
7099                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7100                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7101                 print '<td class="list">';
7102                 print $cgi->a({-href => href(action=>"tree",
7103                                              hash_base=>$hash_base,
7104                                              file_name=>$up)},
7105                               "..");
7106                 print "</td>\n";
7107                 print "<td class=\"link\"></td>\n";
7108
7109                 print "</tr>\n";
7110         }
7111         foreach my $line (@entries) {
7112                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7113
7114                 if ($alternate) {
7115                         print "<tr class=\"dark\">\n";
7116                 } else {
7117                         print "<tr class=\"light\">\n";
7118                 }
7119                 $alternate ^= 1;
7120
7121                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7122
7123                 print "</tr>\n";
7124         }
7125         print "</table>\n" .
7126               "</div>";
7127         git_footer_html();
7128 }
7129
7130 sub snapshot_name {
7131         my ($project, $hash) = @_;
7132
7133         # path/to/project.git  -> project
7134         # path/to/project/.git -> project
7135         my $name = to_utf8($project);
7136         $name =~ s,([^/])/*\.git$,$1,;
7137         $name = basename($name);
7138         # sanitize name
7139         $name =~ s/[[:cntrl:]]/?/g;
7140
7141         my $ver = $hash;
7142         if ($hash =~ /^[0-9a-fA-F]+$/) {
7143                 # shorten SHA-1 hash
7144                 my $full_hash = git_get_full_hash($project, $hash);
7145                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7146                         $ver = git_get_short_hash($project, $hash);
7147                 }
7148         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7149                 # tags don't need shortened SHA-1 hash
7150                 $ver = $1;
7151         } else {
7152                 # branches and other need shortened SHA-1 hash
7153                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7154                         $ver = $1;
7155                 }
7156                 $ver .= '-' . git_get_short_hash($project, $hash);
7157         }
7158         # in case of hierarchical branch names
7159         $ver =~ s!/!.!g;
7160
7161         # name = project-version_string
7162         $name = "$name-$ver";
7163
7164         return wantarray ? ($name, $name) : $name;
7165 }
7166
7167 sub exit_if_unmodified_since {
7168         my ($latest_epoch) = @_;
7169         our $cgi;
7170
7171         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7172         if (defined $if_modified) {
7173                 my $since;
7174                 if (eval { require HTTP::Date; 1; }) {
7175                         $since = HTTP::Date::str2time($if_modified);
7176                 } elsif (eval { require Time::ParseDate; 1; }) {
7177                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7178                 }
7179                 if (defined $since && $latest_epoch <= $since) {
7180                         my %latest_date = parse_date($latest_epoch);
7181                         print $cgi->header(
7182                                 -last_modified => $latest_date{'rfc2822'},
7183                                 -status => '304 Not Modified');
7184                         goto DONE_GITWEB;
7185                 }
7186         }
7187 }
7188
7189 sub git_snapshot {
7190         my $format = $input_params{'snapshot_format'};
7191         if (!@snapshot_fmts) {
7192                 die_error(403, "Snapshots not allowed");
7193         }
7194         # default to first supported snapshot format
7195         $format ||= $snapshot_fmts[0];
7196         if ($format !~ m/^[a-z0-9]+$/) {
7197                 die_error(400, "Invalid snapshot format parameter");
7198         } elsif (!exists($known_snapshot_formats{$format})) {
7199                 die_error(400, "Unknown snapshot format");
7200         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7201                 die_error(403, "Snapshot format not allowed");
7202         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7203                 die_error(403, "Unsupported snapshot format");
7204         }
7205
7206         my $type = git_get_type("$hash^{}");
7207         if (!$type) {
7208                 die_error(404, 'Object does not exist');
7209         }  elsif ($type eq 'blob') {
7210                 die_error(400, 'Object is not a tree-ish');
7211         }
7212
7213         my ($name, $prefix) = snapshot_name($project, $hash);
7214         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7215
7216         my %co = parse_commit($hash);
7217         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7218
7219         my $cmd = quote_command(
7220                 git_cmd(), 'archive',
7221                 "--format=$known_snapshot_formats{$format}{'format'}",
7222                 "--prefix=$prefix/", $hash);
7223         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7224                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7225         }
7226
7227         $filename =~ s/(["\\])/\\$1/g;
7228         my %latest_date;
7229         if (%co) {
7230                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7231         }
7232
7233         print $cgi->header(
7234                 -type => $known_snapshot_formats{$format}{'type'},
7235                 -content_disposition => 'inline; filename="' . $filename . '"',
7236                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7237                 -status => '200 OK');
7238
7239         open my $fd, "-|", $cmd
7240                 or die_error(500, "Execute git-archive failed");
7241         binmode STDOUT, ':raw';
7242         print <$fd>;
7243         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7244         close $fd;
7245 }
7246
7247 sub git_log_generic {
7248         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7249
7250         my $head = git_get_head_hash($project);
7251         if (!defined $base) {
7252                 $base = $head;
7253         }
7254         if (!defined $page) {
7255                 $page = 0;
7256         }
7257         my $refs = git_get_references();
7258
7259         my $commit_hash = $base;
7260         if (defined $parent) {
7261                 $commit_hash = "$parent..$base";
7262         }
7263         my @commitlist =
7264                 parse_commits($commit_hash, 101, (100 * $page),
7265                               defined $file_name ? ($file_name, "--full-history") : ());
7266
7267         my $ftype;
7268         if (!defined $file_hash && defined $file_name) {
7269                 # some commits could have deleted file in question,
7270                 # and not have it in tree, but one of them has to have it
7271                 for (my $i = 0; $i < @commitlist; $i++) {
7272                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7273                         last if defined $file_hash;
7274                 }
7275         }
7276         if (defined $file_hash) {
7277                 $ftype = git_get_type($file_hash);
7278         }
7279         if (defined $file_name && !defined $ftype) {
7280                 die_error(500, "Unknown type of object");
7281         }
7282         my %co;
7283         if (defined $file_name) {
7284                 %co = parse_commit($base)
7285                         or die_error(404, "Unknown commit object");
7286         }
7287
7288
7289         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7290         my $next_link = '';
7291         if ($#commitlist >= 100) {
7292                 $next_link =
7293                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7294                                  -accesskey => "n", -title => "Alt-n"}, "next");
7295         }
7296         my $patch_max = gitweb_get_feature('patches');
7297         if ($patch_max && !defined $file_name) {
7298                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7299                         $paging_nav .= " &sdot; " .
7300                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7301                                         "patches");
7302                 }
7303         }
7304
7305         git_header_html();
7306         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7307         if (defined $file_name) {
7308                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7309         } else {
7310                 git_print_header_div('summary', $project)
7311         }
7312         git_print_page_path($file_name, $ftype, $hash_base)
7313                 if (defined $file_name);
7314
7315         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7316                      $file_name, $file_hash, $ftype);
7317
7318         git_footer_html();
7319 }
7320
7321 sub git_log {
7322         git_log_generic('log', \&git_log_body,
7323                         $hash, $hash_parent);
7324 }
7325
7326 sub git_commit {
7327         $hash ||= $hash_base || "HEAD";
7328         my %co = parse_commit($hash)
7329             or die_error(404, "Unknown commit object");
7330
7331         my $parent  = $co{'parent'};
7332         my $parents = $co{'parents'}; # listref
7333
7334         # we need to prepare $formats_nav before any parameter munging
7335         my $formats_nav;
7336         if (!defined $parent) {
7337                 # --root commitdiff
7338                 $formats_nav .= '(initial)';
7339         } elsif (@$parents == 1) {
7340                 # single parent commit
7341                 $formats_nav .=
7342                         '(parent: ' .
7343                         $cgi->a({-href => href(action=>"commit",
7344                                                hash=>$parent)},
7345                                 esc_html(substr($parent, 0, 7))) .
7346                         ')';
7347         } else {
7348                 # merge commit
7349                 $formats_nav .=
7350                         '(merge: ' .
7351                         join(' ', map {
7352                                 $cgi->a({-href => href(action=>"commit",
7353                                                        hash=>$_)},
7354                                         esc_html(substr($_, 0, 7)));
7355                         } @$parents ) .
7356                         ')';
7357         }
7358         if (gitweb_check_feature('patches') && @$parents <= 1) {
7359                 $formats_nav .= " | " .
7360                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7361                                 "patch");
7362         }
7363
7364         if (!defined $parent) {
7365                 $parent = "--root";
7366         }
7367         my @difftree;
7368         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7369                 @diff_opts,
7370                 (@$parents <= 1 ? $parent : '-c'),
7371                 $hash, "--"
7372                 or die_error(500, "Open git-diff-tree failed");
7373         @difftree = map { chomp; $_ } <$fd>;
7374         close $fd or die_error(404, "Reading git-diff-tree failed");
7375
7376         # non-textual hash id's can be cached
7377         my $expires;
7378         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7379                 $expires = "+1d";
7380         }
7381         my $refs = git_get_references();
7382         my $ref = format_ref_marker($refs, $co{'id'});
7383
7384         git_header_html(undef, $expires);
7385         git_print_page_nav('commit', '',
7386                            $hash, $co{'tree'}, $hash,
7387                            $formats_nav);
7388
7389         if (defined $co{'parent'}) {
7390                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7391         } else {
7392                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7393         }
7394         print "<div class=\"title_text\">\n" .
7395               "<table class=\"object_header\">\n";
7396         git_print_authorship_rows(\%co);
7397         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7398         print "<tr>" .
7399               "<td>tree</td>" .
7400               "<td class=\"sha1\">" .
7401               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7402                        class => "list"}, $co{'tree'}) .
7403               "</td>" .
7404               "<td class=\"link\">" .
7405               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7406                       "tree");
7407         my $snapshot_links = format_snapshot_links($hash);
7408         if (defined $snapshot_links) {
7409                 print " | " . $snapshot_links;
7410         }
7411         print "</td>" .
7412               "</tr>\n";
7413
7414         foreach my $par (@$parents) {
7415                 print "<tr>" .
7416                       "<td>parent</td>" .
7417                       "<td class=\"sha1\">" .
7418                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7419                                class => "list"}, $par) .
7420                       "</td>" .
7421                       "<td class=\"link\">" .
7422                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7423                       " | " .
7424                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7425                       "</td>" .
7426                       "</tr>\n";
7427         }
7428         print "</table>".
7429               "</div>\n";
7430
7431         print "<div class=\"page_body\">\n";
7432         git_print_log($co{'comment'});
7433         print "</div>\n";
7434
7435         git_difftree_body(\@difftree, $hash, @$parents);
7436
7437         git_footer_html();
7438 }
7439
7440 sub git_object {
7441         # object is defined by:
7442         # - hash or hash_base alone
7443         # - hash_base and file_name
7444         my $type;
7445
7446         # - hash or hash_base alone
7447         if ($hash || ($hash_base && !defined $file_name)) {
7448                 my $object_id = $hash || $hash_base;
7449
7450                 open my $fd, "-|", quote_command(
7451                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7452                         or die_error(404, "Object does not exist");
7453                 $type = <$fd>;
7454                 chomp $type;
7455                 close $fd
7456                         or die_error(404, "Object does not exist");
7457
7458         # - hash_base and file_name
7459         } elsif ($hash_base && defined $file_name) {
7460                 $file_name =~ s,/+$,,;
7461
7462                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7463                         or die_error(404, "Base object does not exist");
7464
7465                 # here errors should not hapen
7466                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7467                         or die_error(500, "Open git-ls-tree failed");
7468                 my $line = <$fd>;
7469                 close $fd;
7470
7471                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7472                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7473                         die_error(404, "File or directory for given base does not exist");
7474                 }
7475                 $type = $2;
7476                 $hash = $3;
7477         } else {
7478                 die_error(400, "Not enough information to find object");
7479         }
7480
7481         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7482                                           hash=>$hash, hash_base=>$hash_base,
7483                                           file_name=>$file_name),
7484                              -status => '302 Found');
7485 }
7486
7487 sub git_blobdiff {
7488         my $format = shift || 'html';
7489         my $diff_style = $input_params{'diff_style'} || 'inline';
7490
7491         my $fd;
7492         my @difftree;
7493         my %diffinfo;
7494         my $expires;
7495
7496         # preparing $fd and %diffinfo for git_patchset_body
7497         # new style URI
7498         if (defined $hash_base && defined $hash_parent_base) {
7499                 if (defined $file_name) {
7500                         # read raw output
7501                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7502                                 $hash_parent_base, $hash_base,
7503                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7504                                 or die_error(500, "Open git-diff-tree failed");
7505                         @difftree = map { chomp; $_ } <$fd>;
7506                         close $fd
7507                                 or die_error(404, "Reading git-diff-tree failed");
7508                         @difftree
7509                                 or die_error(404, "Blob diff not found");
7510
7511                 } elsif (defined $hash &&
7512                          $hash =~ /[0-9a-fA-F]{40}/) {
7513                         # try to find filename from $hash
7514
7515                         # read filtered raw output
7516                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7517                                 $hash_parent_base, $hash_base, "--"
7518                                 or die_error(500, "Open git-diff-tree failed");
7519                         @difftree =
7520                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7521                                 # $hash == to_id
7522                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7523                                 map { chomp; $_ } <$fd>;
7524                         close $fd
7525                                 or die_error(404, "Reading git-diff-tree failed");
7526                         @difftree
7527                                 or die_error(404, "Blob diff not found");
7528
7529                 } else {
7530                         die_error(400, "Missing one of the blob diff parameters");
7531                 }
7532
7533                 if (@difftree > 1) {
7534                         die_error(400, "Ambiguous blob diff specification");
7535                 }
7536
7537                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7538                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7539                 $file_name   ||= $diffinfo{'to_file'};
7540
7541                 $hash_parent ||= $diffinfo{'from_id'};
7542                 $hash        ||= $diffinfo{'to_id'};
7543
7544                 # non-textual hash id's can be cached
7545                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7546                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7547                         $expires = '+1d';
7548                 }
7549
7550                 # open patch output
7551                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7552                         '-p', ($format eq 'html' ? "--full-index" : ()),
7553                         $hash_parent_base, $hash_base,
7554                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7555                         or die_error(500, "Open git-diff-tree failed");
7556         }
7557
7558         # old/legacy style URI -- not generated anymore since 1.4.3.
7559         if (!%diffinfo) {
7560                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7561         }
7562
7563         # header
7564         if ($format eq 'html') {
7565                 my $formats_nav =
7566                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7567                                 "raw");
7568                 $formats_nav .= diff_style_nav($diff_style);
7569                 git_header_html(undef, $expires);
7570                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7571                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7572                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7573                 } else {
7574                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7575                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7576                 }
7577                 if (defined $file_name) {
7578                         git_print_page_path($file_name, "blob", $hash_base);
7579                 } else {
7580                         print "<div class=\"page_path\"></div>\n";
7581                 }
7582
7583         } elsif ($format eq 'plain') {
7584                 print $cgi->header(
7585                         -type => 'text/plain',
7586                         -charset => 'utf-8',
7587                         -expires => $expires,
7588                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7589
7590                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7591
7592         } else {
7593                 die_error(400, "Unknown blobdiff format");
7594         }
7595
7596         # patch
7597         if ($format eq 'html') {
7598                 print "<div class=\"page_body\">\n";
7599
7600                 git_patchset_body($fd, $diff_style,
7601                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7602                 close $fd;
7603
7604                 print "</div>\n"; # class="page_body"
7605                 git_footer_html();
7606
7607         } else {
7608                 while (my $line = <$fd>) {
7609                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7610                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7611
7612                         print $line;
7613
7614                         last if $line =~ m!^\+\+\+!;
7615                 }
7616                 local $/ = undef;
7617                 print <$fd>;
7618                 close $fd;
7619         }
7620 }
7621
7622 sub git_blobdiff_plain {
7623         git_blobdiff('plain');
7624 }
7625
7626 # assumes that it is added as later part of already existing navigation,
7627 # so it returns "| foo | bar" rather than just "foo | bar"
7628 sub diff_style_nav {
7629         my ($diff_style, $is_combined) = @_;
7630         $diff_style ||= 'inline';
7631
7632         return "" if ($is_combined);
7633
7634         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7635         my %styles = @styles;
7636         @styles =
7637                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7638
7639         return join '',
7640                 map { " | ".$_ }
7641                 map {
7642                         $_ eq $diff_style ? $styles{$_} :
7643                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7644                 } @styles;
7645 }
7646
7647 sub git_commitdiff {
7648         my %params = @_;
7649         my $format = $params{-format} || 'html';
7650         my $diff_style = $input_params{'diff_style'} || 'inline';
7651
7652         my ($patch_max) = gitweb_get_feature('patches');
7653         if ($format eq 'patch') {
7654                 die_error(403, "Patch view not allowed") unless $patch_max;
7655         }
7656
7657         $hash ||= $hash_base || "HEAD";
7658         my %co = parse_commit($hash)
7659             or die_error(404, "Unknown commit object");
7660
7661         # choose format for commitdiff for merge
7662         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7663                 $hash_parent = '--cc';
7664         }
7665         # we need to prepare $formats_nav before almost any parameter munging
7666         my $formats_nav;
7667         if ($format eq 'html') {
7668                 $formats_nav =
7669                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7670                                 "raw");
7671                 if ($patch_max && @{$co{'parents'}} <= 1) {
7672                         $formats_nav .= " | " .
7673                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7674                                         "patch");
7675                 }
7676                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7677
7678                 if (defined $hash_parent &&
7679                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7680                         # commitdiff with two commits given
7681                         my $hash_parent_short = $hash_parent;
7682                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7683                                 $hash_parent_short = substr($hash_parent, 0, 7);
7684                         }
7685                         $formats_nav .=
7686                                 ' (from';
7687                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7688                                 if ($co{'parents'}[$i] eq $hash_parent) {
7689                                         $formats_nav .= ' parent ' . ($i+1);
7690                                         last;
7691                                 }
7692                         }
7693                         $formats_nav .= ': ' .
7694                                 $cgi->a({-href => href(-replay=>1,
7695                                                        hash=>$hash_parent, hash_base=>undef)},
7696                                         esc_html($hash_parent_short)) .
7697                                 ')';
7698                 } elsif (!$co{'parent'}) {
7699                         # --root commitdiff
7700                         $formats_nav .= ' (initial)';
7701                 } elsif (scalar @{$co{'parents'}} == 1) {
7702                         # single parent commit
7703                         $formats_nav .=
7704                                 ' (parent: ' .
7705                                 $cgi->a({-href => href(-replay=>1,
7706                                                        hash=>$co{'parent'}, hash_base=>undef)},
7707                                         esc_html(substr($co{'parent'}, 0, 7))) .
7708                                 ')';
7709                 } else {
7710                         # merge commit
7711                         if ($hash_parent eq '--cc') {
7712                                 $formats_nav .= ' | ' .
7713                                         $cgi->a({-href => href(-replay=>1,
7714                                                                hash=>$hash, hash_parent=>'-c')},
7715                                                 'combined');
7716                         } else { # $hash_parent eq '-c'
7717                                 $formats_nav .= ' | ' .
7718                                         $cgi->a({-href => href(-replay=>1,
7719                                                                hash=>$hash, hash_parent=>'--cc')},
7720                                                 'compact');
7721                         }
7722                         $formats_nav .=
7723                                 ' (merge: ' .
7724                                 join(' ', map {
7725                                         $cgi->a({-href => href(-replay=>1,
7726                                                                hash=>$_, hash_base=>undef)},
7727                                                 esc_html(substr($_, 0, 7)));
7728                                 } @{$co{'parents'}} ) .
7729                                 ')';
7730                 }
7731         }
7732
7733         my $hash_parent_param = $hash_parent;
7734         if (!defined $hash_parent_param) {
7735                 # --cc for multiple parents, --root for parentless
7736                 $hash_parent_param =
7737                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7738         }
7739
7740         # read commitdiff
7741         my $fd;
7742         my @difftree;
7743         if ($format eq 'html') {
7744                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7745                         "--no-commit-id", "--patch-with-raw", "--full-index",
7746                         $hash_parent_param, $hash, "--"
7747                         or die_error(500, "Open git-diff-tree failed");
7748
7749                 while (my $line = <$fd>) {
7750                         chomp $line;
7751                         # empty line ends raw part of diff-tree output
7752                         last unless $line;
7753                         push @difftree, scalar parse_difftree_raw_line($line);
7754                 }
7755
7756         } elsif ($format eq 'plain') {
7757                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7758                         '-p', $hash_parent_param, $hash, "--"
7759                         or die_error(500, "Open git-diff-tree failed");
7760         } elsif ($format eq 'patch') {
7761                 # For commit ranges, we limit the output to the number of
7762                 # patches specified in the 'patches' feature.
7763                 # For single commits, we limit the output to a single patch,
7764                 # diverging from the git-format-patch default.
7765                 my @commit_spec = ();
7766                 if ($hash_parent) {
7767                         if ($patch_max > 0) {
7768                                 push @commit_spec, "-$patch_max";
7769                         }
7770                         push @commit_spec, '-n', "$hash_parent..$hash";
7771                 } else {
7772                         if ($params{-single}) {
7773                                 push @commit_spec, '-1';
7774                         } else {
7775                                 if ($patch_max > 0) {
7776                                         push @commit_spec, "-$patch_max";
7777                                 }
7778                                 push @commit_spec, "-n";
7779                         }
7780                         push @commit_spec, '--root', $hash;
7781                 }
7782                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7783                         '--encoding=utf8', '--stdout', @commit_spec
7784                         or die_error(500, "Open git-format-patch failed");
7785         } else {
7786                 die_error(400, "Unknown commitdiff format");
7787         }
7788
7789         # non-textual hash id's can be cached
7790         my $expires;
7791         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7792                 $expires = "+1d";
7793         }
7794
7795         # write commit message
7796         if ($format eq 'html') {
7797                 my $refs = git_get_references();
7798                 my $ref = format_ref_marker($refs, $co{'id'});
7799
7800                 git_header_html(undef, $expires);
7801                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7802                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7803                 print "<div class=\"title_text\">\n" .
7804                       "<table class=\"object_header\">\n";
7805                 git_print_authorship_rows(\%co);
7806                 print "</table>".
7807                       "</div>\n";
7808                 print "<div class=\"page_body\">\n";
7809                 if (@{$co{'comment'}} > 1) {
7810                         print "<div class=\"log\">\n";
7811                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7812                         print "</div>\n"; # class="log"
7813                 }
7814
7815         } elsif ($format eq 'plain') {
7816                 my $refs = git_get_references("tags");
7817                 my $tagname = git_get_rev_name_tags($hash);
7818                 my $filename = basename($project) . "-$hash.patch";
7819
7820                 print $cgi->header(
7821                         -type => 'text/plain',
7822                         -charset => 'utf-8',
7823                         -expires => $expires,
7824                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7825                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7826                 print "From: " . to_utf8($co{'author'}) . "\n";
7827                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7828                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7829
7830                 print "X-Git-Tag: $tagname\n" if $tagname;
7831                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7832
7833                 foreach my $line (@{$co{'comment'}}) {
7834                         print to_utf8($line) . "\n";
7835                 }
7836                 print "---\n\n";
7837         } elsif ($format eq 'patch') {
7838                 my $filename = basename($project) . "-$hash.patch";
7839
7840                 print $cgi->header(
7841                         -type => 'text/plain',
7842                         -charset => 'utf-8',
7843                         -expires => $expires,
7844                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7845         }
7846
7847         # write patch
7848         if ($format eq 'html') {
7849                 my $use_parents = !defined $hash_parent ||
7850                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7851                 git_difftree_body(\@difftree, $hash,
7852                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7853                 print "<br/>\n";
7854
7855                 git_patchset_body($fd, $diff_style,
7856                                   \@difftree, $hash,
7857                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7858                 close $fd;
7859                 print "</div>\n"; # class="page_body"
7860                 git_footer_html();
7861
7862         } elsif ($format eq 'plain') {
7863                 local $/ = undef;
7864                 print <$fd>;
7865                 close $fd
7866                         or print "Reading git-diff-tree failed\n";
7867         } elsif ($format eq 'patch') {
7868                 local $/ = undef;
7869                 print <$fd>;
7870                 close $fd
7871                         or print "Reading git-format-patch failed\n";
7872         }
7873 }
7874
7875 sub git_commitdiff_plain {
7876         git_commitdiff(-format => 'plain');
7877 }
7878
7879 # format-patch-style patches
7880 sub git_patch {
7881         git_commitdiff(-format => 'patch', -single => 1);
7882 }
7883
7884 sub git_patches {
7885         git_commitdiff(-format => 'patch');
7886 }
7887
7888 sub git_history {
7889         git_log_generic('history', \&git_history_body,
7890                         $hash_base, $hash_parent_base,
7891                         $file_name, $hash);
7892 }
7893
7894 sub git_search {
7895         $searchtype ||= 'commit';
7896
7897         # check if appropriate features are enabled
7898         gitweb_check_feature('search')
7899                 or die_error(403, "Search is disabled");
7900         if ($searchtype eq 'pickaxe') {
7901                 # pickaxe may take all resources of your box and run for several minutes
7902                 # with every query - so decide by yourself how public you make this feature
7903                 gitweb_check_feature('pickaxe')
7904                         or die_error(403, "Pickaxe search is disabled");
7905         }
7906         if ($searchtype eq 'grep') {
7907                 # grep search might be potentially CPU-intensive, too
7908                 gitweb_check_feature('grep')
7909                         or die_error(403, "Grep search is disabled");
7910         }
7911
7912         if (!defined $searchtext) {
7913                 die_error(400, "Text field is empty");
7914         }
7915         if (!defined $hash) {
7916                 $hash = git_get_head_hash($project);
7917         }
7918         my %co = parse_commit($hash);
7919         if (!%co) {
7920                 die_error(404, "Unknown commit object");
7921         }
7922         if (!defined $page) {
7923                 $page = 0;
7924         }
7925
7926         if ($searchtype eq 'commit' ||
7927             $searchtype eq 'author' ||
7928             $searchtype eq 'committer') {
7929                 git_search_message(%co);
7930         } elsif ($searchtype eq 'pickaxe') {
7931                 git_search_changes(%co);
7932         } elsif ($searchtype eq 'grep') {
7933                 git_search_files(%co);
7934         } else {
7935                 die_error(400, "Unknown search type");
7936         }
7937 }
7938
7939 sub git_search_help {
7940         git_header_html();
7941         git_print_page_nav('','', $hash,$hash,$hash);
7942         print <<EOT;
7943 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7944 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7945 the pattern entered is recognized as the POSIX extended
7946 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7947 insensitive).</p>
7948 <dl>
7949 <dt><b>commit</b></dt>
7950 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7951 EOT
7952         my $have_grep = gitweb_check_feature('grep');
7953         if ($have_grep) {
7954                 print <<EOT;
7955 <dt><b>grep</b></dt>
7956 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7957     a different one) are searched for the given pattern. On large trees, this search can take
7958 a while and put some strain on the server, so please use it with some consideration. Note that
7959 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7960 case-sensitive.</dd>
7961 EOT
7962         }
7963         print <<EOT;
7964 <dt><b>author</b></dt>
7965 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7966 <dt><b>committer</b></dt>
7967 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7968 EOT
7969         my $have_pickaxe = gitweb_check_feature('pickaxe');
7970         if ($have_pickaxe) {
7971                 print <<EOT;
7972 <dt><b>pickaxe</b></dt>
7973 <dd>All commits that caused the string to appear or disappear from any file (changes that
7974 added, removed or "modified" the string) will be listed. This search can take a while and
7975 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7976 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7977 EOT
7978         }
7979         print "</dl>\n";
7980         git_footer_html();
7981 }
7982
7983 sub git_shortlog {
7984         git_log_generic('shortlog', \&git_shortlog_body,
7985                         $hash, $hash_parent);
7986 }
7987
7988 ## ......................................................................
7989 ## feeds (RSS, Atom; OPML)
7990
7991 sub git_feed {
7992         my $format = shift || 'atom';
7993         my $have_blame = gitweb_check_feature('blame');
7994
7995         # Atom: http://www.atomenabled.org/developers/syndication/
7996         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7997         if ($format ne 'rss' && $format ne 'atom') {
7998                 die_error(400, "Unknown web feed format");
7999         }
8000
8001         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8002         my $head = $hash || 'HEAD';
8003         my @commitlist = parse_commits($head, 150, 0, $file_name);
8004
8005         my %latest_commit;
8006         my %latest_date;
8007         my $content_type = "application/$format+xml";
8008         if (defined $cgi->http('HTTP_ACCEPT') &&
8009                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8010                 # browser (feed reader) prefers text/xml
8011                 $content_type = 'text/xml';
8012         }
8013         if (defined($commitlist[0])) {
8014                 %latest_commit = %{$commitlist[0]};
8015                 my $latest_epoch = $latest_commit{'committer_epoch'};
8016                 exit_if_unmodified_since($latest_epoch);
8017                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8018         }
8019         print $cgi->header(
8020                 -type => $content_type,
8021                 -charset => 'utf-8',
8022                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8023                 -status => '200 OK');
8024
8025         # Optimization: skip generating the body if client asks only
8026         # for Last-Modified date.
8027         return if ($cgi->request_method() eq 'HEAD');
8028
8029         # header variables
8030         my $title = "$site_name - $project/$action";
8031         my $feed_type = 'log';
8032         if (defined $hash) {
8033                 $title .= " - '$hash'";
8034                 $feed_type = 'branch log';
8035                 if (defined $file_name) {
8036                         $title .= " :: $file_name";
8037                         $feed_type = 'history';
8038                 }
8039         } elsif (defined $file_name) {
8040                 $title .= " - $file_name";
8041                 $feed_type = 'history';
8042         }
8043         $title .= " $feed_type";
8044         my $descr = git_get_project_description($project);
8045         if (defined $descr) {
8046                 $descr = esc_html($descr);
8047         } else {
8048                 $descr = "$project " .
8049                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8050                          " feed";
8051         }
8052         my $owner = git_get_project_owner($project);
8053         $owner = esc_html($owner);
8054
8055         #header
8056         my $alt_url;
8057         if (defined $file_name) {
8058                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8059         } elsif (defined $hash) {
8060                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8061         } else {
8062                 $alt_url = href(-full=>1, action=>"summary");
8063         }
8064         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8065         if ($format eq 'rss') {
8066                 print <<XML;
8067 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8068 <channel>
8069 XML
8070                 print "<title>$title</title>\n" .
8071                       "<link>$alt_url</link>\n" .
8072                       "<description>$descr</description>\n" .
8073                       "<language>en</language>\n" .
8074                       # project owner is responsible for 'editorial' content
8075                       "<managingEditor>$owner</managingEditor>\n";
8076                 if (defined $logo || defined $favicon) {
8077                         # prefer the logo to the favicon, since RSS
8078                         # doesn't allow both
8079                         my $img = esc_url($logo || $favicon);
8080                         print "<image>\n" .
8081                               "<url>$img</url>\n" .
8082                               "<title>$title</title>\n" .
8083                               "<link>$alt_url</link>\n" .
8084                               "</image>\n";
8085                 }
8086                 if (%latest_date) {
8087                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8088                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8089                 }
8090                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8091         } elsif ($format eq 'atom') {
8092                 print <<XML;
8093 <feed xmlns="http://www.w3.org/2005/Atom">
8094 XML
8095                 print "<title>$title</title>\n" .
8096                       "<subtitle>$descr</subtitle>\n" .
8097                       '<link rel="alternate" type="text/html" href="' .
8098                       $alt_url . '" />' . "\n" .
8099                       '<link rel="self" type="' . $content_type . '" href="' .
8100                       $cgi->self_url() . '" />' . "\n" .
8101                       "<id>" . href(-full=>1) . "</id>\n" .
8102                       # use project owner for feed author
8103                       "<author><name>$owner</name></author>\n";
8104                 if (defined $favicon) {
8105                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8106                 }
8107                 if (defined $logo) {
8108                         # not twice as wide as tall: 72 x 27 pixels
8109                         print "<logo>" . esc_url($logo) . "</logo>\n";
8110                 }
8111                 if (! %latest_date) {
8112                         # dummy date to keep the feed valid until commits trickle in:
8113                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8114                 } else {
8115                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8116                 }
8117                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8118         }
8119
8120         # contents
8121         for (my $i = 0; $i <= $#commitlist; $i++) {
8122                 my %co = %{$commitlist[$i]};
8123                 my $commit = $co{'id'};
8124                 # we read 150, we always show 30 and the ones more recent than 48 hours
8125                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8126                         last;
8127                 }
8128                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8129
8130                 # get list of changed files
8131                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8132                         $co{'parent'} || "--root",
8133                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8134                         or next;
8135                 my @difftree = map { chomp; $_ } <$fd>;
8136                 close $fd
8137                         or next;
8138
8139                 # print element (entry, item)
8140                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8141                 if ($format eq 'rss') {
8142                         print "<item>\n" .
8143                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8144                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8145                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8146                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8147                               "<link>$co_url</link>\n" .
8148                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8149                               "<content:encoded>" .
8150                               "<![CDATA[\n";
8151                 } elsif ($format eq 'atom') {
8152                         print "<entry>\n" .
8153                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8154                               "<updated>$cd{'iso-8601'}</updated>\n" .
8155                               "<author>\n" .
8156                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8157                         if ($co{'author_email'}) {
8158                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8159                         }
8160                         print "</author>\n" .
8161                               # use committer for contributor
8162                               "<contributor>\n" .
8163                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8164                         if ($co{'committer_email'}) {
8165                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8166                         }
8167                         print "</contributor>\n" .
8168                               "<published>$cd{'iso-8601'}</published>\n" .
8169                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8170                               "<id>$co_url</id>\n" .
8171                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8172                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8173                 }
8174                 my $comment = $co{'comment'};
8175                 print "<pre>\n";
8176                 foreach my $line (@$comment) {
8177                         $line = esc_html($line);
8178                         print "$line\n";
8179                 }
8180                 print "</pre><ul>\n";
8181                 foreach my $difftree_line (@difftree) {
8182                         my %difftree = parse_difftree_raw_line($difftree_line);
8183                         next if !$difftree{'from_id'};
8184
8185                         my $file = $difftree{'file'} || $difftree{'to_file'};
8186
8187                         print "<li>" .
8188                               "[" .
8189                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8190                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8191                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8192                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8193                                       -title => "diff"}, 'D');
8194                         if ($have_blame) {
8195                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8196                                                              file_name=>$file, hash_base=>$commit),
8197                                               -title => "blame"}, 'B');
8198                         }
8199                         # if this is not a feed of a file history
8200                         if (!defined $file_name || $file_name ne $file) {
8201                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8202                                                              file_name=>$file, hash=>$commit),
8203                                               -title => "history"}, 'H');
8204                         }
8205                         $file = esc_path($file);
8206                         print "] ".
8207                               "$file</li>\n";
8208                 }
8209                 if ($format eq 'rss') {
8210                         print "</ul>]]>\n" .
8211                               "</content:encoded>\n" .
8212                               "</item>\n";
8213                 } elsif ($format eq 'atom') {
8214                         print "</ul>\n</div>\n" .
8215                               "</content>\n" .
8216                               "</entry>\n";
8217                 }
8218         }
8219
8220         # end of feed
8221         if ($format eq 'rss') {
8222                 print "</channel>\n</rss>\n";
8223         } elsif ($format eq 'atom') {
8224                 print "</feed>\n";
8225         }
8226 }
8227
8228 sub git_rss {
8229         git_feed('rss');
8230 }
8231
8232 sub git_atom {
8233         git_feed('atom');
8234 }
8235
8236 sub git_opml {
8237         my @list = git_get_projects_list($project_filter, $strict_export);
8238         if (!@list) {
8239                 die_error(404, "No projects found");
8240         }
8241
8242         print $cgi->header(
8243                 -type => 'text/xml',
8244                 -charset => 'utf-8',
8245                 -content_disposition => 'inline; filename="opml.xml"');
8246
8247         my $title = esc_html($site_name);
8248         my $filter = " within subdirectory ";
8249         if (defined $project_filter) {
8250                 $filter .= esc_html($project_filter);
8251         } else {
8252                 $filter = "";
8253         }
8254         print <<XML;
8255 <?xml version="1.0" encoding="utf-8"?>
8256 <opml version="1.0">
8257 <head>
8258   <title>$title OPML Export$filter</title>
8259 </head>
8260 <body>
8261 <outline text="git RSS feeds">
8262 XML
8263
8264         foreach my $pr (@list) {
8265                 my %proj = %$pr;
8266                 my $head = git_get_head_hash($proj{'path'});
8267                 if (!defined $head) {
8268                         next;
8269                 }
8270                 $git_dir = "$projectroot/$proj{'path'}";
8271                 my %co = parse_commit($head);
8272                 if (!%co) {
8273                         next;
8274                 }
8275
8276                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8277                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8278                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8279                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8280         }
8281         print <<XML;
8282 </outline>
8283 </body>
8284 </opml>
8285 XML
8286 }