gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 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 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # don't generate age column on the projects list page
 137 our $omit_age_column = 0;
 138
 139 # don't generate information about owners of repositories
 140 our $omit_owner=0;
 141
 142 # show repository only if this subroutine returns true
 143 # when given the path to the project, for example:
 144 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 145 our $export_auth_hook = undef;
 146
 147 # only allow viewing of repositories also shown on the overview page
 148 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 149
 150 # list of git base URLs used for URL to where fetch project from,
 151 # i.e. full URL is "$git_base_url/$project"
 152 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 153
 154 # default blob_plain mimetype and default charset for text/plain blob
 155 our $default_blob_plain_mimetype = 'text/plain';
 156 our $default_text_plain_charset  = undef;
 157
 158 # file to use for guessing MIME types before trying /etc/mime.types
 159 # (relative to the current git repository)
 160 our $mimetypes_file = undef;
 161
 162 # assume this charset if line contains non-UTF-8 characters;
 163 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 164 # for which encoding all byte sequences are valid, for example
 165 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 166 # could be even 'utf-8' for the old behavior)
 167 our $fallback_encoding = 'latin1';
 168
 169 # rename detection options for git-diff and git-diff-tree
 170 # - default is '-M', with the cost proportional to
 171 #   (number of removed files) * (number of new files).
 172 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 173 #   (number of changed files + number of removed files) * (number of new files)
 174 # - even more costly is '-C', '--find-copies-harder' with cost
 175 #   (number of files in the original tree) * (number of new files)
 176 # - one might want to include '-B' option, e.g. '-B', '-M'
 177 our @diff_opts = ('-M'); # taken from git_commit
 178
 179 # Disables features that would allow repository owners to inject script into
 180 # the gitweb domain.
 181 our $prevent_xss = 0;
 182
 183 # Path to the highlight executable to use (must be the one from
 184 # http://www.andre-simon.de due to assumptions about parameters and output).
 185 # Useful if highlight is not installed on your webserver's PATH.
 186 # [Default: highlight]
 187 our $highlight_bin = "++HIGHLIGHT_BIN++";
 188
 189 # information about snapshot formats that gitweb is capable of serving
 190 our %known_snapshot_formats = (
 191         # name => {
 192         #       'display' => display name,
 193         #       'type' => mime type,
 194         #       'suffix' => filename suffix,
 195         #       'format' => --format for git-archive,
 196         #       'compressor' => [compressor command and arguments]
 197         #                       (array reference, optional)
 198         #       'disabled' => boolean (optional)}
 199         #
 200         'tgz' => {
 201                 'display' => 'tar.gz',
 202                 'type' => 'application/x-gzip',
 203                 'suffix' => '.tar.gz',
 204                 'format' => 'tar',
 205                 'compressor' => ['gzip', '-n']},
 206
 207         'tbz2' => {
 208                 'display' => 'tar.bz2',
 209                 'type' => 'application/x-bzip2',
 210                 'suffix' => '.tar.bz2',
 211                 'format' => 'tar',
 212                 'compressor' => ['bzip2']},
 213
 214         'txz' => {
 215                 'display' => 'tar.xz',
 216                 'type' => 'application/x-xz',
 217                 'suffix' => '.tar.xz',
 218                 'format' => 'tar',
 219                 'compressor' => ['xz'],
 220                 'disabled' => 1},
 221
 222         'zip' => {
 223                 'display' => 'zip',
 224                 'type' => 'application/x-zip',
 225                 'suffix' => '.zip',
 226                 'format' => 'zip'},
 227 );
 228
 229 # Aliases so we understand old gitweb.snapshot values in repository
 230 # configuration.
 231 our %known_snapshot_format_aliases = (
 232         'gzip'  => 'tgz',
 233         'bzip2' => 'tbz2',
 234         'xz'    => 'txz',
 235
 236         # backward compatibility: legacy gitweb config support
 237         'x-gzip' => undef, 'gz' => undef,
 238         'x-bzip2' => undef, 'bz2' => undef,
 239         'x-zip' => undef, '' => undef,
 240 );
 241
 242 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 243 # are changed, it may be appropriate to change these values too via
 244 # $GITWEB_CONFIG.
 245 our %avatar_size = (
 246         'default' => 16,
 247         'double'  => 32
 248 );
 249
 250 # Used to set the maximum load that we will still respond to gitweb queries.
 251 # If server load exceed this value then return "503 server busy" error.
 252 # If gitweb cannot determined server load, it is taken to be 0.
 253 # Leave it undefined (or set to 'undef') to turn off load checking.
 254 our $maxload = 300;
 255
 256 # configuration for 'highlight' (http://www.andre-simon.de/)
 257 # match by basename
 258 our %highlight_basename = (
 259         #'Program' => 'py',
 260         #'Library' => 'py',
 261         'SConstruct' => 'py', # SCons equivalent of Makefile
 262         'Makefile' => 'make',
 263 );
 264 # match by extension
 265 our %highlight_ext = (
 266         # main extensions, defining name of syntax;
 267         # see files in /usr/share/highlight/langDefs/ directory
 268         map { $_ => $_ }
 269                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 270         # alternate extensions, see /etc/highlight/filetypes.conf
 271         'h' => 'c',
 272         map { $_ => 'sh'  } qw(bash zsh ksh),
 273         map { $_ => 'cpp' } qw(cxx c++ cc),
 274         map { $_ => 'php' } qw(php3 php4 php5 phps),
 275         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 276         map { $_ => 'make'} qw(mak mk),
 277         map { $_ => 'xml' } qw(xhtml html htm),
 278 );
 279
 280 # You define site-wide feature defaults here; override them with
 281 # $GITWEB_CONFIG as necessary.
 282 our %feature = (
 283         # feature => {
 284         #       'sub' => feature-sub (subroutine),
 285         #       'override' => allow-override (boolean),
 286         #       'default' => [ default options...] (array reference)}
 287         #
 288         # if feature is overridable (it means that allow-override has true value),
 289         # then feature-sub will be called with default options as parameters;
 290         # return value of feature-sub indicates if to enable specified feature
 291         #
 292         # if there is no 'sub' key (no feature-sub), then feature cannot be
 293         # overridden
 294         #
 295         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 296         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 297         # is enabled
 298
 299         # Enable the 'blame' blob view, showing the last commit that modified
 300         # each line in the file. This can be very CPU-intensive.
 301
 302         # To enable system wide have in $GITWEB_CONFIG
 303         # $feature{'blame'}{'default'} = [1];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'blame'}{'override'} = 1;
 306         # and in project config gitweb.blame = 0|1;
 307         'blame' => {
 308                 'sub' => sub { feature_bool('blame', @_) },
 309                 'override' => 0,
 310                 'default' => [0]},
 311
 312         # Enable the 'snapshot' link, providing a compressed archive of any
 313         # tree. This can potentially generate high traffic if you have large
 314         # project.
 315
 316         # Value is a list of formats defined in %known_snapshot_formats that
 317         # you wish to offer.
 318         # To disable system wide have in $GITWEB_CONFIG
 319         # $feature{'snapshot'}{'default'} = [];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'snapshot'}{'override'} = 1;
 322         # and in project config, a comma-separated list of formats or "none"
 323         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 324         'snapshot' => {
 325                 'sub' => \&feature_snapshot,
 326                 'override' => 0,
 327                 'default' => ['tgz']},
 328
 329         # Enable text search, which will list the commits which match author,
 330         # committer or commit text to a given string.  Enabled by default.
 331         # Project specific override is not supported.
 332         #
 333         # Note that this controls all search features, which means that if
 334         # it is disabled, then 'grep' and 'pickaxe' search would also be
 335         # disabled.
 336         'search' => {
 337                 'override' => 0,
 338                 'default' => [1]},
 339
 340         # Enable grep search, which will list the files in currently selected
 341         # tree containing the given string. Enabled by default. This can be
 342         # potentially CPU-intensive, of course.
 343         # Note that you need to have 'search' feature enabled too.
 344
 345         # To enable system wide have in $GITWEB_CONFIG
 346         # $feature{'grep'}{'default'} = [1];
 347         # To have project specific config enable override in $GITWEB_CONFIG
 348         # $feature{'grep'}{'override'} = 1;
 349         # and in project config gitweb.grep = 0|1;
 350         'grep' => {
 351                 'sub' => sub { feature_bool('grep', @_) },
 352                 'override' => 0,
 353                 'default' => [1]},
 354
 355         # Enable the pickaxe search, which will list the commits that modified
 356         # a given string in a file. This can be practical and quite faster
 357         # alternative to 'blame', but still potentially CPU-intensive.
 358         # Note that you need to have 'search' feature enabled too.
 359
 360         # To enable system wide have in $GITWEB_CONFIG
 361         # $feature{'pickaxe'}{'default'} = [1];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'pickaxe'}{'override'} = 1;
 364         # and in project config gitweb.pickaxe = 0|1;
 365         'pickaxe' => {
 366                 'sub' => sub { feature_bool('pickaxe', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Enable showing size of blobs in a 'tree' view, in a separate
 371         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 372
 373         # To disable system wide have in $GITWEB_CONFIG
 374         # $feature{'show-sizes'}{'default'} = [0];
 375         # To have project specific config enable override in $GITWEB_CONFIG
 376         # $feature{'show-sizes'}{'override'} = 1;
 377         # and in project config gitweb.showsizes = 0|1;
 378         'show-sizes' => {
 379                 'sub' => sub { feature_bool('showsizes', @_) },
 380                 'override' => 0,
 381                 'default' => [1]},
 382
 383         # Make gitweb use an alternative format of the URLs which can be
 384         # more readable and natural-looking: project name is embedded
 385         # directly in the path and the query string contains other
 386         # auxiliary information. All gitweb installations recognize
 387         # URL in either format; this configures in which formats gitweb
 388         # generates links.
 389
 390         # To enable system wide have in $GITWEB_CONFIG
 391         # $feature{'pathinfo'}{'default'} = [1];
 392         # Project specific override is not supported.
 393
 394         # Note that you will need to change the default location of CSS,
 395         # favicon, logo and possibly other files to an absolute URL. Also,
 396         # if gitweb.cgi serves as your indexfile, you will need to force
 397         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 398         'pathinfo' => {
 399                 'override' => 0,
 400                 'default' => [0]},
 401
 402         # Make gitweb consider projects in project root subdirectories
 403         # to be forks of existing projects. Given project $projname.git,
 404         # projects matching $projname/*.git will not be shown in the main
 405         # projects list, instead a '+' mark will be added to $projname
 406         # there and a 'forks' view will be enabled for the project, listing
 407         # all the forks. If project list is taken from a file, forks have
 408         # to be listed after the main project.
 409
 410         # To enable system wide have in $GITWEB_CONFIG
 411         # $feature{'forks'}{'default'} = [1];
 412         # Project specific override is not supported.
 413         'forks' => {
 414                 'override' => 0,
 415                 'default' => [0]},
 416
 417         # Insert custom links to the action bar of all project pages.
 418         # This enables you mainly to link to third-party scripts integrating
 419         # into gitweb; e.g. git-browser for graphical history representation
 420         # or custom web-based repository administration interface.
 421
 422         # The 'default' value consists of a list of triplets in the form
 423         # (label, link, position) where position is the label after which
 424         # to insert the link and link is a format string where %n expands
 425         # to the project name, %f to the project path within the filesystem,
 426         # %h to the current hash (h gitweb parameter) and %b to the current
 427         # hash base (hb gitweb parameter); %% expands to %.
 428
 429         # To enable system wide have in $GITWEB_CONFIG e.g.
 430         # $feature{'actions'}{'default'} = [('graphiclog',
 431         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 432         # Project specific override is not supported.
 433         'actions' => {
 434                 'override' => 0,
 435                 'default' => []},
 436
 437         # Allow gitweb scan project content tags of project repository,
 438         # and display the popular Web 2.0-ish "tag cloud" near the projects
 439         # list.  Note that this is something COMPLETELY different from the
 440         # normal Git tags.
 441
 442         # gitweb by itself can show existing tags, but it does not handle
 443         # tagging itself; you need to do it externally, outside gitweb.
 444         # The format is described in git_get_project_ctags() subroutine.
 445         # You may want to install the HTML::TagCloud Perl module to get
 446         # a pretty tag cloud instead of just a list of tags.
 447
 448         # To enable system wide have in $GITWEB_CONFIG
 449         # $feature{'ctags'}{'default'} = [1];
 450         # Project specific override is not supported.
 451
 452         # In the future whether ctags editing is enabled might depend
 453         # on the value, but using 1 should always mean no editing of ctags.
 454         'ctags' => {
 455                 'override' => 0,
 456                 'default' => [0]},
 457
 458         # The maximum number of patches in a patchset generated in patch
 459         # view. Set this to 0 or undef to disable patch view, or to a
 460         # negative number to remove any limit.
 461
 462         # To disable system wide have in $GITWEB_CONFIG
 463         # $feature{'patches'}{'default'} = [0];
 464         # To have project specific config enable override in $GITWEB_CONFIG
 465         # $feature{'patches'}{'override'} = 1;
 466         # and in project config gitweb.patches = 0|n;
 467         # where n is the maximum number of patches allowed in a patchset.
 468         'patches' => {
 469                 'sub' => \&feature_patches,
 470                 'override' => 0,
 471                 'default' => [16]},
 472
 473         # Avatar support. When this feature is enabled, views such as
 474         # shortlog or commit will display an avatar associated with
 475         # the email of the committer(s) and/or author(s).
 476
 477         # Currently available providers are gravatar and picon.
 478         # If an unknown provider is specified, the feature is disabled.
 479
 480         # Gravatar depends on Digest::MD5.
 481         # Picon currently relies on the indiana.edu database.
 482
 483         # To enable system wide have in $GITWEB_CONFIG
 484         # $feature{'avatar'}{'default'} = ['<provider>'];
 485         # where <provider> is either gravatar or picon.
 486         # To have project specific config enable override in $GITWEB_CONFIG
 487         # $feature{'avatar'}{'override'} = 1;
 488         # and in project config gitweb.avatar = <provider>;
 489         'avatar' => {
 490                 'sub' => \&feature_avatar,
 491                 'override' => 0,
 492                 'default' => ['']},
 493
 494         # Enable displaying how much time and how many git commands
 495         # it took to generate and display page.  Disabled by default.
 496         # Project specific override is not supported.
 497         'timed' => {
 498                 'override' => 0,
 499                 'default' => [0]},
 500
 501         # Enable turning some links into links to actions which require
 502         # JavaScript to run (like 'blame_incremental').  Not enabled by
 503         # default.  Project specific override is currently not supported.
 504         'javascript-actions' => {
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable and configure ability to change common timezone for dates
 509         # in gitweb output via JavaScript.  Enabled by default.
 510         # Project specific override is not supported.
 511         'javascript-timezone' => {
 512                 'override' => 0,
 513                 'default' => [
 514                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 515                                      # or undef to turn off this feature
 516                         'gitweb_tz', # name of cookie where to store selected timezone
 517                         'datetime',  # CSS class used to mark up dates for manipulation
 518                 ]},
 519
 520         # Syntax highlighting support. This is based on Daniel Svensson's
 521         # and Sham Chukoury's work in gitweb-xmms2.git.
 522         # It requires the 'highlight' program present in $PATH,
 523         # and therefore is disabled by default.
 524
 525         # To enable system wide have in $GITWEB_CONFIG
 526         # $feature{'highlight'}{'default'} = [1];
 527
 528         'highlight' => {
 529                 'sub' => sub { feature_bool('highlight', @_) },
 530                 'override' => 0,
 531                 'default' => [0]},
 532
 533         # Enable displaying of remote heads in the heads list
 534
 535         # To enable system wide have in $GITWEB_CONFIG
 536         # $feature{'remote_heads'}{'default'} = [1];
 537         # To have project specific config enable override in $GITWEB_CONFIG
 538         # $feature{'remote_heads'}{'override'} = 1;
 539         # and in project config gitweb.remote_heads = 0|1;
 540         'remote_heads' => {
 541                 'sub' => sub { feature_bool('remote_heads', @_) },
 542                 'override' => 0,
 543                 'default' => [0]},
 544 );
 545
 546 sub gitweb_get_feature {
 547         my ($name) = @_;
 548         return unless exists $feature{$name};
 549         my ($sub, $override, @defaults) = (
 550                 $feature{$name}{'sub'},
 551                 $feature{$name}{'override'},
 552                 @{$feature{$name}{'default'}});
 553         # project specific override is possible only if we have project
 554         our $git_dir; # global variable, declared later
 555         if (!$override || !defined $git_dir) {
 556                 return @defaults;
 557         }
 558         if (!defined $sub) {
 559                 warn "feature $name is not overridable";
 560                 return @defaults;
 561         }
 562         return $sub->(@defaults);
 563 }
 564
 565 # A wrapper to check if a given feature is enabled.
 566 # With this, you can say
 567 #
 568 #   my $bool_feat = gitweb_check_feature('bool_feat');
 569 #   gitweb_check_feature('bool_feat') or somecode;
 570 #
 571 # instead of
 572 #
 573 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 574 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 575 #
 576 sub gitweb_check_feature {
 577         return (gitweb_get_feature(@_))[0];
 578 }
 579
 580
 581 sub feature_bool {
 582         my $key = shift;
 583         my ($val) = git_get_project_config($key, '--bool');
 584
 585         if (!defined $val) {
 586                 return ($_[0]);
 587         } elsif ($val eq 'true') {
 588                 return (1);
 589         } elsif ($val eq 'false') {
 590                 return (0);
 591         }
 592 }
 593
 594 sub feature_snapshot {
 595         my (@fmts) = @_;
 596
 597         my ($val) = git_get_project_config('snapshot');
 598
 599         if ($val) {
 600                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 601         }
 602
 603         return @fmts;
 604 }
 605
 606 sub feature_patches {
 607         my @val = (git_get_project_config('patches', '--int'));
 608
 609         if (@val) {
 610                 return @val;
 611         }
 612
 613         return ($_[0]);
 614 }
 615
 616 sub feature_avatar {
 617         my @val = (git_get_project_config('avatar'));
 618
 619         return @val ? @val : @_;
 620 }
 621
 622 # checking HEAD file with -e is fragile if the repository was
 623 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 624 # and then pruned.
 625 sub check_head_link {
 626         my ($dir) = @_;
 627         my $headfile = "$dir/HEAD";
 628         return ((-e $headfile) ||
 629                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 630 }
 631
 632 sub check_export_ok {
 633         my ($dir) = @_;
 634         return (check_head_link($dir) &&
 635                 (!$export_ok || -e "$dir/$export_ok") &&
 636                 (!$export_auth_hook || $export_auth_hook->($dir)));
 637 }
 638
 639 # process alternate names for backward compatibility
 640 # filter out unsupported (unknown) snapshot formats
 641 sub filter_snapshot_fmts {
 642         my @fmts = @_;
 643
 644         @fmts = map {
 645                 exists $known_snapshot_format_aliases{$_} ?
 646                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 647         @fmts = grep {
 648                 exists $known_snapshot_formats{$_} &&
 649                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 650 }
 651
 652 # If it is set to code reference, it is code that it is to be run once per
 653 # request, allowing updating configurations that change with each request,
 654 # while running other code in config file only once.
 655 #
 656 # Otherwise, if it is false then gitweb would process config file only once;
 657 # if it is true then gitweb config would be run for each request.
 658 our $per_request_config = 1;
 659
 660 # read and parse gitweb config file given by its parameter.
 661 # returns true on success, false on recoverable error, allowing
 662 # to chain this subroutine, using first file that exists.
 663 # dies on errors during parsing config file, as it is unrecoverable.
 664 sub read_config_file {
 665         my $filename = shift;
 666         return unless defined $filename;
 667         # die if there are errors parsing config file
 668         if (-e $filename) {
 669                 do $filename;
 670                 die $@ if $@;
 671                 return 1;
 672         }
 673         return;
 674 }
 675
 676 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 677 sub evaluate_gitweb_config {
 678         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 679         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 680         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 681
 682         # Protect agains duplications of file names, to not read config twice.
 683         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 684         # there possibility of duplication of filename there doesn't matter.
 685         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 686         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 687
 688         # Common system-wide settings for convenience.
 689         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 690         read_config_file($GITWEB_CONFIG_COMMON);
 691
 692         # Use first config file that exists.  This means use the per-instance
 693         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 694         read_config_file($GITWEB_CONFIG) and return;
 695         read_config_file($GITWEB_CONFIG_SYSTEM);
 696 }
 697
 698 # Get loadavg of system, to compare against $maxload.
 699 # Currently it requires '/proc/loadavg' present to get loadavg;
 700 # if it is not present it returns 0, which means no load checking.
 701 sub get_loadavg {
 702         if( -e '/proc/loadavg' ){
 703                 open my $fd, '<', '/proc/loadavg'
 704                         or return 0;
 705                 my @load = split(/\s+/, scalar <$fd>);
 706                 close $fd;
 707
 708                 # The first three columns measure CPU and IO utilization of the last one,
 709                 # five, and 10 minute periods.  The fourth column shows the number of
 710                 # currently running processes and the total number of processes in the m/n
 711                 # format.  The last column displays the last process ID used.
 712                 return $load[0] || 0;
 713         }
 714         # additional checks for load average should go here for things that don't export
 715         # /proc/loadavg
 716
 717         return 0;
 718 }
 719
 720 # version of the core git binary
 721 our $git_version;
 722 sub evaluate_git_version {
 723         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 724         $number_of_git_cmds++;
 725 }
 726
 727 sub check_loadavg {
 728         if (defined $maxload && get_loadavg() > $maxload) {
 729                 die_error(503, "The load average on the server is too high");
 730         }
 731 }
 732
 733 # ======================================================================
 734 # input validation and dispatch
 735
 736 # input parameters can be collected from a variety of sources (presently, CGI
 737 # and PATH_INFO), so we define an %input_params hash that collects them all
 738 # together during validation: this allows subsequent uses (e.g. href()) to be
 739 # agnostic of the parameter origin
 740
 741 our %input_params = ();
 742
 743 # input parameters are stored with the long parameter name as key. This will
 744 # also be used in the href subroutine to convert parameters to their CGI
 745 # equivalent, and since the href() usage is the most frequent one, we store
 746 # the name -> CGI key mapping here, instead of the reverse.
 747 #
 748 # XXX: Warning: If you touch this, check the search form for updating,
 749 # too.
 750
 751 our @cgi_param_mapping = (
 752         project => "p",
 753         action => "a",
 754         file_name => "f",
 755         file_parent => "fp",
 756         hash => "h",
 757         hash_parent => "hp",
 758         hash_base => "hb",
 759         hash_parent_base => "hpb",
 760         page => "pg",
 761         order => "o",
 762         searchtext => "s",
 763         searchtype => "st",
 764         snapshot_format => "sf",
 765         extra_options => "opt",
 766         search_use_regexp => "sr",
 767         ctag => "by_tag",
 768         diff_style => "ds",
 769         project_filter => "pf",
 770         # this must be last entry (for manipulation from JavaScript)
 771         javascript => "js"
 772 );
 773 our %cgi_param_mapping = @cgi_param_mapping;
 774
 775 # we will also need to know the possible actions, for validation
 776 our %actions = (
 777         "blame" => \&git_blame,
 778         "blame_incremental" => \&git_blame_incremental,
 779         "blame_data" => \&git_blame_data,
 780         "blobdiff" => \&git_blobdiff,
 781         "blobdiff_plain" => \&git_blobdiff_plain,
 782         "blob" => \&git_blob,
 783         "blob_plain" => \&git_blob_plain,
 784         "commitdiff" => \&git_commitdiff,
 785         "commitdiff_plain" => \&git_commitdiff_plain,
 786         "commit" => \&git_commit,
 787         "forks" => \&git_forks,
 788         "heads" => \&git_heads,
 789         "history" => \&git_history,
 790         "log" => \&git_log,
 791         "patch" => \&git_patch,
 792         "patches" => \&git_patches,
 793         "remotes" => \&git_remotes,
 794         "rss" => \&git_rss,
 795         "atom" => \&git_atom,
 796         "search" => \&git_search,
 797         "search_help" => \&git_search_help,
 798         "shortlog" => \&git_shortlog,
 799         "summary" => \&git_summary,
 800         "tag" => \&git_tag,
 801         "tags" => \&git_tags,
 802         "tree" => \&git_tree,
 803         "snapshot" => \&git_snapshot,
 804         "object" => \&git_object,
 805         # those below don't need $project
 806         "opml" => \&git_opml,
 807         "project_list" => \&git_project_list,
 808         "project_index" => \&git_project_index,
 809 );
 810
 811 # finally, we have the hash of allowed extra_options for the commands that
 812 # allow them
 813 our %allowed_options = (
 814         "--no-merges" => [ qw(rss atom log shortlog history) ],
 815 );
 816
 817 # fill %input_params with the CGI parameters. All values except for 'opt'
 818 # should be single values, but opt can be an array. We should probably
 819 # build an array of parameters that can be multi-valued, but since for the time
 820 # being it's only this one, we just single it out
 821 sub evaluate_query_params {
 822         our $cgi;
 823
 824         while (my ($name, $symbol) = each %cgi_param_mapping) {
 825                 if ($symbol eq 'opt') {
 826                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 827                 } else {
 828                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 829                 }
 830         }
 831 }
 832
 833 # now read PATH_INFO and update the parameter list for missing parameters
 834 sub evaluate_path_info {
 835         return if defined $input_params{'project'};
 836         return if !$path_info;
 837         $path_info =~ s,^/+,,;
 838         return if !$path_info;
 839
 840         # find which part of PATH_INFO is project
 841         my $project = $path_info;
 842         $project =~ s,/+$,,;
 843         while ($project && !check_head_link("$projectroot/$project")) {
 844                 $project =~ s,/*[^/]*$,,;
 845         }
 846         return unless $project;
 847         $input_params{'project'} = $project;
 848
 849         # do not change any parameters if an action is given using the query string
 850         return if $input_params{'action'};
 851         $path_info =~ s,^\Q$project\E/*,,;
 852
 853         # next, check if we have an action
 854         my $action = $path_info;
 855         $action =~ s,/.*$,,;
 856         if (exists $actions{$action}) {
 857                 $path_info =~ s,^$action/*,,;
 858                 $input_params{'action'} = $action;
 859         }
 860
 861         # list of actions that want hash_base instead of hash, but can have no
 862         # pathname (f) parameter
 863         my @wants_base = (
 864                 'tree',
 865                 'history',
 866         );
 867
 868         # we want to catch, among others
 869         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 870         my ($parentrefname, $parentpathname, $refname, $pathname) =
 871                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 872
 873         # first, analyze the 'current' part
 874         if (defined $pathname) {
 875                 # we got "branch:filename" or "branch:dir/"
 876                 # we could use git_get_type(branch:pathname), but:
 877                 # - it needs $git_dir
 878                 # - it does a git() call
 879                 # - the convention of terminating directories with a slash
 880                 #   makes it superfluous
 881                 # - embedding the action in the PATH_INFO would make it even
 882                 #   more superfluous
 883                 $pathname =~ s,^/+,,;
 884                 if (!$pathname || substr($pathname, -1) eq "/") {
 885                         $input_params{'action'} ||= "tree";
 886                         $pathname =~ s,/$,,;
 887                 } else {
 888                         # the default action depends on whether we had parent info
 889                         # or not
 890                         if ($parentrefname) {
 891                                 $input_params{'action'} ||= "blobdiff_plain";
 892                         } else {
 893                                 $input_params{'action'} ||= "blob_plain";
 894                         }
 895                 }
 896                 $input_params{'hash_base'} ||= $refname;
 897                 $input_params{'file_name'} ||= $pathname;
 898         } elsif (defined $refname) {
 899                 # we got "branch". In this case we have to choose if we have to
 900                 # set hash or hash_base.
 901                 #
 902                 # Most of the actions without a pathname only want hash to be
 903                 # set, except for the ones specified in @wants_base that want
 904                 # hash_base instead. It should also be noted that hand-crafted
 905                 # links having 'history' as an action and no pathname or hash
 906                 # set will fail, but that happens regardless of PATH_INFO.
 907                 if (defined $parentrefname) {
 908                         # if there is parent let the default be 'shortlog' action
 909                         # (for http://git.example.com/repo.git/A..B links); if there
 910                         # is no parent, dispatch will detect type of object and set
 911                         # action appropriately if required (if action is not set)
 912                         $input_params{'action'} ||= "shortlog";
 913                 }
 914                 if ($input_params{'action'} &&
 915                     grep { $_ eq $input_params{'action'} } @wants_base) {
 916                         $input_params{'hash_base'} ||= $refname;
 917                 } else {
 918                         $input_params{'hash'} ||= $refname;
 919                 }
 920         }
 921
 922         # next, handle the 'parent' part, if present
 923         if (defined $parentrefname) {
 924                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 925                 # someproject/blobdiff/oldrev..newrev:/filename
 926                 if ($parentpathname) {
 927                         $parentpathname =~ s,^/+,,;
 928                         $parentpathname =~ s,/$,,;
 929                         $input_params{'file_parent'} ||= $parentpathname;
 930                 } else {
 931                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 932                 }
 933                 # we assume that hash_parent_base is wanted if a path was specified,
 934                 # or if the action wants hash_base instead of hash
 935                 if (defined $input_params{'file_parent'} ||
 936                         grep { $_ eq $input_params{'action'} } @wants_base) {
 937                         $input_params{'hash_parent_base'} ||= $parentrefname;
 938                 } else {
 939                         $input_params{'hash_parent'} ||= $parentrefname;
 940                 }
 941         }
 942
 943         # for the snapshot action, we allow URLs in the form
 944         # $project/snapshot/$hash.ext
 945         # where .ext determines the snapshot and gets removed from the
 946         # passed $refname to provide the $hash.
 947         #
 948         # To be able to tell that $refname includes the format extension, we
 949         # require the following two conditions to be satisfied:
 950         # - the hash input parameter MUST have been set from the $refname part
 951         #   of the URL (i.e. they must be equal)
 952         # - the snapshot format MUST NOT have been defined already (e.g. from
 953         #   CGI parameter sf)
 954         # It's also useless to try any matching unless $refname has a dot,
 955         # so we check for that too
 956         if (defined $input_params{'action'} &&
 957                 $input_params{'action'} eq 'snapshot' &&
 958                 defined $refname && index($refname, '.') != -1 &&
 959                 $refname eq $input_params{'hash'} &&
 960                 !defined $input_params{'snapshot_format'}) {
 961                 # We loop over the known snapshot formats, checking for
 962                 # extensions. Allowed extensions are both the defined suffix
 963                 # (which includes the initial dot already) and the snapshot
 964                 # format key itself, with a prepended dot
 965                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 966                         my $hash = $refname;
 967                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 968                                 next;
 969                         }
 970                         my $sfx = $1;
 971                         # a valid suffix was found, so set the snapshot format
 972                         # and reset the hash parameter
 973                         $input_params{'snapshot_format'} = $fmt;
 974                         $input_params{'hash'} = $hash;
 975                         # we also set the format suffix to the one requested
 976                         # in the URL: this way a request for e.g. .tgz returns
 977                         # a .tgz instead of a .tar.gz
 978                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 979                         last;
 980                 }
 981         }
 982 }
 983
 984 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 985      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 986      $searchtext, $search_regexp, $project_filter);
 987 sub evaluate_and_validate_params {
 988         our $action = $input_params{'action'};
 989         if (defined $action) {
 990                 if (!validate_action($action)) {
 991                         die_error(400, "Invalid action parameter");
 992                 }
 993         }
 994
 995         # parameters which are pathnames
 996         our $project = $input_params{'project'};
 997         if (defined $project) {
 998                 if (!validate_project($project)) {
 999                         undef $project;
1000                         die_error(404, "No such project");
1001                 }
1002         }
1003
1004         our $project_filter = $input_params{'project_filter'};
1005         if (defined $project_filter) {
1006                 if (!validate_pathname($project_filter)) {
1007                         die_error(404, "Invalid project_filter parameter");
1008                 }
1009         }
1010
1011         our $file_name = $input_params{'file_name'};
1012         if (defined $file_name) {
1013                 if (!validate_pathname($file_name)) {
1014                         die_error(400, "Invalid file parameter");
1015                 }
1016         }
1017
1018         our $file_parent = $input_params{'file_parent'};
1019         if (defined $file_parent) {
1020                 if (!validate_pathname($file_parent)) {
1021                         die_error(400, "Invalid file parent parameter");
1022                 }
1023         }
1024
1025         # parameters which are refnames
1026         our $hash = $input_params{'hash'};
1027         if (defined $hash) {
1028                 if (!validate_refname($hash)) {
1029                         die_error(400, "Invalid hash parameter");
1030                 }
1031         }
1032
1033         our $hash_parent = $input_params{'hash_parent'};
1034         if (defined $hash_parent) {
1035                 if (!validate_refname($hash_parent)) {
1036                         die_error(400, "Invalid hash parent parameter");
1037                 }
1038         }
1039
1040         our $hash_base = $input_params{'hash_base'};
1041         if (defined $hash_base) {
1042                 if (!validate_refname($hash_base)) {
1043                         die_error(400, "Invalid hash base parameter");
1044                 }
1045         }
1046
1047         our @extra_options = @{$input_params{'extra_options'}};
1048         # @extra_options is always defined, since it can only be (currently) set from
1049         # CGI, and $cgi->param() returns the empty array in array context if the param
1050         # is not set
1051         foreach my $opt (@extra_options) {
1052                 if (not exists $allowed_options{$opt}) {
1053                         die_error(400, "Invalid option parameter");
1054                 }
1055                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1056                         die_error(400, "Invalid option parameter for this action");
1057                 }
1058         }
1059
1060         our $hash_parent_base = $input_params{'hash_parent_base'};
1061         if (defined $hash_parent_base) {
1062                 if (!validate_refname($hash_parent_base)) {
1063                         die_error(400, "Invalid hash parent base parameter");
1064                 }
1065         }
1066
1067         # other parameters
1068         our $page = $input_params{'page'};
1069         if (defined $page) {
1070                 if ($page =~ m/[^0-9]/) {
1071                         die_error(400, "Invalid page parameter");
1072                 }
1073         }
1074
1075         our $searchtype = $input_params{'searchtype'};
1076         if (defined $searchtype) {
1077                 if ($searchtype =~ m/[^a-z]/) {
1078                         die_error(400, "Invalid searchtype parameter");
1079                 }
1080         }
1081
1082         our $search_use_regexp = $input_params{'search_use_regexp'};
1083
1084         our $searchtext = $input_params{'searchtext'};
1085         our $search_regexp;
1086         if (defined $searchtext) {
1087                 if (length($searchtext) < 2) {
1088                         die_error(403, "At least two characters are required for search parameter");
1089                 }
1090                 if ($search_use_regexp) {
1091                         $search_regexp = $searchtext;
1092                         if (!eval { qr/$search_regexp/; 1; }) {
1093                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1094                                 die_error(400, "Invalid search regexp '$search_regexp'",
1095                                           esc_html($error));
1096                         }
1097                 } else {
1098                         $search_regexp = quotemeta $searchtext;
1099                 }
1100         }
1101 }
1102
1103 # path to the current git repository
1104 our $git_dir;
1105 sub evaluate_git_dir {
1106         our $git_dir = "$projectroot/$project" if $project;
1107 }
1108
1109 our (@snapshot_fmts, $git_avatar);
1110 sub configure_gitweb_features {
1111         # list of supported snapshot formats
1112         our @snapshot_fmts = gitweb_get_feature('snapshot');
1113         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1114
1115         # check that the avatar feature is set to a known provider name,
1116         # and for each provider check if the dependencies are satisfied.
1117         # if the provider name is invalid or the dependencies are not met,
1118         # reset $git_avatar to the empty string.
1119         our ($git_avatar) = gitweb_get_feature('avatar');
1120         if ($git_avatar eq 'gravatar') {
1121                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1122         } elsif ($git_avatar eq 'picon') {
1123                 # no dependencies
1124         } else {
1125                 $git_avatar = '';
1126         }
1127 }
1128
1129 # custom error handler: 'die <message>' is Internal Server Error
1130 sub handle_errors_html {
1131         my $msg = shift; # it is already HTML escaped
1132
1133         # to avoid infinite loop where error occurs in die_error,
1134         # change handler to default handler, disabling handle_errors_html
1135         set_message("Error occured when inside die_error:\n$msg");
1136
1137         # you cannot jump out of die_error when called as error handler;
1138         # the subroutine set via CGI::Carp::set_message is called _after_
1139         # HTTP headers are already written, so it cannot write them itself
1140         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1141 }
1142 set_message(\&handle_errors_html);
1143
1144 # dispatch
1145 sub dispatch {
1146         if (!defined $action) {
1147                 if (defined $hash) {
1148                         $action = git_get_type($hash);
1149                         $action or die_error(404, "Object does not exist");
1150                 } elsif (defined $hash_base && defined $file_name) {
1151                         $action = git_get_type("$hash_base:$file_name");
1152                         $action or die_error(404, "File or directory does not exist");
1153                 } elsif (defined $project) {
1154                         $action = 'summary';
1155                 } else {
1156                         $action = 'project_list';
1157                 }
1158         }
1159         if (!defined($actions{$action})) {
1160                 die_error(400, "Unknown action");
1161         }
1162         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1163             !$project) {
1164                 die_error(400, "Project needed");
1165         }
1166         $actions{$action}->();
1167 }
1168
1169 sub reset_timer {
1170         our $t0 = [ gettimeofday() ]
1171                 if defined $t0;
1172         our $number_of_git_cmds = 0;
1173 }
1174
1175 our $first_request = 1;
1176 sub run_request {
1177         reset_timer();
1178
1179         evaluate_uri();
1180         if ($first_request) {
1181                 evaluate_gitweb_config();
1182                 evaluate_git_version();
1183         }
1184         if ($per_request_config) {
1185                 if (ref($per_request_config) eq 'CODE') {
1186                         $per_request_config->();
1187                 } elsif (!$first_request) {
1188                         evaluate_gitweb_config();
1189                 }
1190         }
1191         check_loadavg();
1192
1193         # $projectroot and $projects_list might be set in gitweb config file
1194         $projects_list ||= $projectroot;
1195
1196         evaluate_query_params();
1197         evaluate_path_info();
1198         evaluate_and_validate_params();
1199         evaluate_git_dir();
1200
1201         configure_gitweb_features();
1202
1203         dispatch();
1204 }
1205
1206 our $is_last_request = sub { 1 };
1207 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1208 our $CGI = 'CGI';
1209 our $cgi;
1210 sub configure_as_fcgi {
1211         require CGI::Fast;
1212         our $CGI = 'CGI::Fast';
1213
1214         my $request_number = 0;
1215         # let each child service 100 requests
1216         our $is_last_request = sub { ++$request_number > 100 };
1217 }
1218 sub evaluate_argv {
1219         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1220         configure_as_fcgi()
1221                 if $script_name =~ /\.fcgi$/;
1222
1223         return unless (@ARGV);
1224
1225         require Getopt::Long;
1226         Getopt::Long::GetOptions(
1227                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1228                 'nproc|n=i' => sub {
1229                         my ($arg, $val) = @_;
1230                         return unless eval { require FCGI::ProcManager; 1; };
1231                         my $proc_manager = FCGI::ProcManager->new({
1232                                 n_processes => $val,
1233                         });
1234                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1235                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1236                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1237                 },
1238         );
1239 }
1240
1241 sub run {
1242         evaluate_argv();
1243
1244         $first_request = 1;
1245         $pre_listen_hook->()
1246                 if $pre_listen_hook;
1247
1248  REQUEST:
1249         while ($cgi = $CGI->new()) {
1250                 $pre_dispatch_hook->()
1251                         if $pre_dispatch_hook;
1252
1253                 run_request();
1254
1255                 $post_dispatch_hook->()
1256                         if $post_dispatch_hook;
1257                 $first_request = 0;
1258
1259                 last REQUEST if ($is_last_request->());
1260         }
1261
1262  DONE_GITWEB:
1263         1;
1264 }
1265
1266 run();
1267
1268 if (defined caller) {
1269         # wrapped in a subroutine processing requests,
1270         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1271         return;
1272 } else {
1273         # pure CGI script, serving single request
1274         exit;
1275 }
1276
1277 ## ======================================================================
1278 ## action links
1279
1280 # possible values of extra options
1281 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1282 # -replay => 1      - start from a current view (replay with modifications)
1283 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1284 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1285 sub href {
1286         my %params = @_;
1287         # default is to use -absolute url() i.e. $my_uri
1288         my $href = $params{-full} ? $my_url : $my_uri;
1289
1290         # implicit -replay, must be first of implicit params
1291         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1292
1293         $params{'project'} = $project unless exists $params{'project'};
1294
1295         if ($params{-replay}) {
1296                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1297                         if (!exists $params{$name}) {
1298                                 $params{$name} = $input_params{$name};
1299                         }
1300                 }
1301         }
1302
1303         my $use_pathinfo = gitweb_check_feature('pathinfo');
1304         if (defined $params{'project'} &&
1305             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1306                 # try to put as many parameters as possible in PATH_INFO:
1307                 #   - project name
1308                 #   - action
1309                 #   - hash_parent or hash_parent_base:/file_parent
1310                 #   - hash or hash_base:/filename
1311                 #   - the snapshot_format as an appropriate suffix
1312
1313                 # When the script is the root DirectoryIndex for the domain,
1314                 # $href here would be something like http://gitweb.example.com/
1315                 # Thus, we strip any trailing / from $href, to spare us double
1316                 # slashes in the final URL
1317                 $href =~ s,/$,,;
1318
1319                 # Then add the project name, if present
1320                 $href .= "/".esc_path_info($params{'project'});
1321                 delete $params{'project'};
1322
1323                 # since we destructively absorb parameters, we keep this
1324                 # boolean that remembers if we're handling a snapshot
1325                 my $is_snapshot = $params{'action'} eq 'snapshot';
1326
1327                 # Summary just uses the project path URL, any other action is
1328                 # added to the URL
1329                 if (defined $params{'action'}) {
1330                         $href .= "/".esc_path_info($params{'action'})
1331                                 unless $params{'action'} eq 'summary';
1332                         delete $params{'action'};
1333                 }
1334
1335                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1336                 # stripping nonexistent or useless pieces
1337                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1338                         || $params{'hash_parent'} || $params{'hash'});
1339                 if (defined $params{'hash_base'}) {
1340                         if (defined $params{'hash_parent_base'}) {
1341                                 $href .= esc_path_info($params{'hash_parent_base'});
1342                                 # skip the file_parent if it's the same as the file_name
1343                                 if (defined $params{'file_parent'}) {
1344                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1345                                                 delete $params{'file_parent'};
1346                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1347                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1348                                                 delete $params{'file_parent'};
1349                                         }
1350                                 }
1351                                 $href .= "..";
1352                                 delete $params{'hash_parent'};
1353                                 delete $params{'hash_parent_base'};
1354                         } elsif (defined $params{'hash_parent'}) {
1355                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1356                                 delete $params{'hash_parent'};
1357                         }
1358
1359                         $href .= esc_path_info($params{'hash_base'});
1360                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1361                                 $href .= ":/".esc_path_info($params{'file_name'});
1362                                 delete $params{'file_name'};
1363                         }
1364                         delete $params{'hash'};
1365                         delete $params{'hash_base'};
1366                 } elsif (defined $params{'hash'}) {
1367                         $href .= esc_path_info($params{'hash'});
1368                         delete $params{'hash'};
1369                 }
1370
1371                 # If the action was a snapshot, we can absorb the
1372                 # snapshot_format parameter too
1373                 if ($is_snapshot) {
1374                         my $fmt = $params{'snapshot_format'};
1375                         # snapshot_format should always be defined when href()
1376                         # is called, but just in case some code forgets, we
1377                         # fall back to the default
1378                         $fmt ||= $snapshot_fmts[0];
1379                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1380                         delete $params{'snapshot_format'};
1381                 }
1382         }
1383
1384         # now encode the parameters explicitly
1385         my @result = ();
1386         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1387                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1388                 if (defined $params{$name}) {
1389                         if (ref($params{$name}) eq "ARRAY") {
1390                                 foreach my $par (@{$params{$name}}) {
1391                                         push @result, $symbol . "=" . esc_param($par);
1392                                 }
1393                         } else {
1394                                 push @result, $symbol . "=" . esc_param($params{$name});
1395                         }
1396                 }
1397         }
1398         $href .= "?" . join(';', @result) if scalar @result;
1399
1400         # final transformation: trailing spaces must be escaped (URI-encoded)
1401         $href =~ s/(\s+)$/CGI::escape($1)/e;
1402
1403         if ($params{-anchor}) {
1404                 $href .= "#".esc_param($params{-anchor});
1405         }
1406
1407         return $href;
1408 }
1409
1410
1411 ## ======================================================================
1412 ## validation, quoting/unquoting and escaping
1413
1414 sub validate_action {
1415         my $input = shift || return undef;
1416         return undef unless exists $actions{$input};
1417         return $input;
1418 }
1419
1420 sub validate_project {
1421         my $input = shift || return undef;
1422         if (!validate_pathname($input) ||
1423                 !(-d "$projectroot/$input") ||
1424                 !check_export_ok("$projectroot/$input") ||
1425                 ($strict_export && !project_in_list($input))) {
1426                 return undef;
1427         } else {
1428                 return $input;
1429         }
1430 }
1431
1432 sub validate_pathname {
1433         my $input = shift || return undef;
1434
1435         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1436         # at the beginning, at the end, and between slashes.
1437         # also this catches doubled slashes
1438         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1439                 return undef;
1440         }
1441         # no null characters
1442         if ($input =~ m!\0!) {
1443                 return undef;
1444         }
1445         return $input;
1446 }
1447
1448 sub validate_refname {
1449         my $input = shift || return undef;
1450
1451         # textual hashes are O.K.
1452         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1453                 return $input;
1454         }
1455         # it must be correct pathname
1456         $input = validate_pathname($input)
1457                 or return undef;
1458         # restrictions on ref name according to git-check-ref-format
1459         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1460                 return undef;
1461         }
1462         return $input;
1463 }
1464
1465 # decode sequences of octets in utf8 into Perl's internal form,
1466 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1467 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1468 sub to_utf8 {
1469         my $str = shift;
1470         return undef unless defined $str;
1471
1472         if (utf8::is_utf8($str) || utf8::decode($str)) {
1473                 return $str;
1474         } else {
1475                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1476         }
1477 }
1478
1479 # quote unsafe chars, but keep the slash, even when it's not
1480 # correct, but quoted slashes look too horrible in bookmarks
1481 sub esc_param {
1482         my $str = shift;
1483         return undef unless defined $str;
1484         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1485         $str =~ s/ /\+/g;
1486         return $str;
1487 }
1488
1489 # the quoting rules for path_info fragment are slightly different
1490 sub esc_path_info {
1491         my $str = shift;
1492         return undef unless defined $str;
1493
1494         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1495         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1496
1497         return $str;
1498 }
1499
1500 # quote unsafe chars in whole URL, so some characters cannot be quoted
1501 sub esc_url {
1502         my $str = shift;
1503         return undef unless defined $str;
1504         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1505         $str =~ s/ /\+/g;
1506         return $str;
1507 }
1508
1509 # quote unsafe characters in HTML attributes
1510 sub esc_attr {
1511
1512         # for XHTML conformance escaping '"' to '&quot;' is not enough
1513         return esc_html(@_);
1514 }
1515
1516 # replace invalid utf8 character with SUBSTITUTION sequence
1517 sub esc_html {
1518         my $str = shift;
1519         my %opts = @_;
1520
1521         return undef unless defined $str;
1522
1523         $str = to_utf8($str);
1524         $str = $cgi->escapeHTML($str);
1525         if ($opts{'-nbsp'}) {
1526                 $str =~ s/ /&nbsp;/g;
1527         }
1528         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1529         return $str;
1530 }
1531
1532 # quote control characters and escape filename to HTML
1533 sub esc_path {
1534         my $str = shift;
1535         my %opts = @_;
1536
1537         return undef unless defined $str;
1538
1539         $str = to_utf8($str);
1540         $str = $cgi->escapeHTML($str);
1541         if ($opts{'-nbsp'}) {
1542                 $str =~ s/ /&nbsp;/g;
1543         }
1544         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1545         return $str;
1546 }
1547
1548 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1549 sub sanitize {
1550         my $str = shift;
1551
1552         return undef unless defined $str;
1553
1554         $str = to_utf8($str);
1555         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1556         return $str;
1557 }
1558
1559 # Make control characters "printable", using character escape codes (CEC)
1560 sub quot_cec {
1561         my $cntrl = shift;
1562         my %opts = @_;
1563         my %es = ( # character escape codes, aka escape sequences
1564                 "\t" => '\t',   # tab            (HT)
1565                 "\n" => '\n',   # line feed      (LF)
1566                 "\r" => '\r',   # carrige return (CR)
1567                 "\f" => '\f',   # form feed      (FF)
1568                 "\b" => '\b',   # backspace      (BS)
1569                 "\a" => '\a',   # alarm (bell)   (BEL)
1570                 "\e" => '\e',   # escape         (ESC)
1571                 "\013" => '\v', # vertical tab   (VT)
1572                 "\000" => '\0', # nul character  (NUL)
1573         );
1574         my $chr = ( (exists $es{$cntrl})
1575                     ? $es{$cntrl}
1576                     : sprintf('\%2x', ord($cntrl)) );
1577         if ($opts{-nohtml}) {
1578                 return $chr;
1579         } else {
1580                 return "<span class=\"cntrl\">$chr</span>";
1581         }
1582 }
1583
1584 # Alternatively use unicode control pictures codepoints,
1585 # Unicode "printable representation" (PR)
1586 sub quot_upr {
1587         my $cntrl = shift;
1588         my %opts = @_;
1589
1590         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1591         if ($opts{-nohtml}) {
1592                 return $chr;
1593         } else {
1594                 return "<span class=\"cntrl\">$chr</span>";
1595         }
1596 }
1597
1598 # git may return quoted and escaped filenames
1599 sub unquote {
1600         my $str = shift;
1601
1602         sub unq {
1603                 my $seq = shift;
1604                 my %es = ( # character escape codes, aka escape sequences
1605                         't' => "\t",   # tab            (HT, TAB)
1606                         'n' => "\n",   # newline        (NL)
1607                         'r' => "\r",   # return         (CR)
1608                         'f' => "\f",   # form feed      (FF)
1609                         'b' => "\b",   # backspace      (BS)
1610                         'a' => "\a",   # alarm (bell)   (BEL)
1611                         'e' => "\e",   # escape         (ESC)
1612                         'v' => "\013", # vertical tab   (VT)
1613                 );
1614
1615                 if ($seq =~ m/^[0-7]{1,3}$/) {
1616                         # octal char sequence
1617                         return chr(oct($seq));
1618                 } elsif (exists $es{$seq}) {
1619                         # C escape sequence, aka character escape code
1620                         return $es{$seq};
1621                 }
1622                 # quoted ordinary character
1623                 return $seq;
1624         }
1625
1626         if ($str =~ m/^"(.*)"$/) {
1627                 # needs unquoting
1628                 $str = $1;
1629                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1630         }
1631         return $str;
1632 }
1633
1634 # escape tabs (convert tabs to spaces)
1635 sub untabify {
1636         my $line = shift;
1637
1638         while ((my $pos = index($line, "\t")) != -1) {
1639                 if (my $count = (8 - ($pos % 8))) {
1640                         my $spaces = ' ' x $count;
1641                         $line =~ s/\t/$spaces/;
1642                 }
1643         }
1644
1645         return $line;
1646 }
1647
1648 sub project_in_list {
1649         my $project = shift;
1650         my @list = git_get_projects_list();
1651         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1652 }
1653
1654 ## ----------------------------------------------------------------------
1655 ## HTML aware string manipulation
1656
1657 # Try to chop given string on a word boundary between position
1658 # $len and $len+$add_len. If there is no word boundary there,
1659 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1660 # (marking chopped part) would be longer than given string.
1661 sub chop_str {
1662         my $str = shift;
1663         my $len = shift;
1664         my $add_len = shift || 10;
1665         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1666
1667         # Make sure perl knows it is utf8 encoded so we don't
1668         # cut in the middle of a utf8 multibyte char.
1669         $str = to_utf8($str);
1670
1671         # allow only $len chars, but don't cut a word if it would fit in $add_len
1672         # if it doesn't fit, cut it if it's still longer than the dots we would add
1673         # remove chopped character entities entirely
1674
1675         # when chopping in the middle, distribute $len into left and right part
1676         # return early if chopping wouldn't make string shorter
1677         if ($where eq 'center') {
1678                 return $str if ($len + 5 >= length($str)); # filler is length 5
1679                 $len = int($len/2);
1680         } else {
1681                 return $str if ($len + 4 >= length($str)); # filler is length 4
1682         }
1683
1684         # regexps: ending and beginning with word part up to $add_len
1685         my $endre = qr/.{$len}\w{0,$add_len}/;
1686         my $begre = qr/\w{0,$add_len}.{$len}/;
1687
1688         if ($where eq 'left') {
1689                 $str =~ m/^(.*?)($begre)$/;
1690                 my ($lead, $body) = ($1, $2);
1691                 if (length($lead) > 4) {
1692                         $lead = " ...";
1693                 }
1694                 return "$lead$body";
1695
1696         } elsif ($where eq 'center') {
1697                 $str =~ m/^($endre)(.*)$/;
1698                 my ($left, $str)  = ($1, $2);
1699                 $str =~ m/^(.*?)($begre)$/;
1700                 my ($mid, $right) = ($1, $2);
1701                 if (length($mid) > 5) {
1702                         $mid = " ... ";
1703                 }
1704                 return "$left$mid$right";
1705
1706         } else {
1707                 $str =~ m/^($endre)(.*)$/;
1708                 my $body = $1;
1709                 my $tail = $2;
1710                 if (length($tail) > 4) {
1711                         $tail = "... ";
1712                 }
1713                 return "$body$tail";
1714         }
1715 }
1716
1717 # takes the same arguments as chop_str, but also wraps a <span> around the
1718 # result with a title attribute if it does get chopped. Additionally, the
1719 # string is HTML-escaped.
1720 sub chop_and_escape_str {
1721         my ($str) = @_;
1722
1723         my $chopped = chop_str(@_);
1724         $str = to_utf8($str);
1725         if ($chopped eq $str) {
1726                 return esc_html($chopped);
1727         } else {
1728                 $str =~ s/[[:cntrl:]]/?/g;
1729                 return $cgi->span({-title=>$str}, esc_html($chopped));
1730         }
1731 }
1732
1733 # Highlight selected fragments of string, using given CSS class,
1734 # and escape HTML.  It is assumed that fragments do not overlap.
1735 # Regions are passed as list of pairs (array references).
1736 #
1737 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1738 # '<span class="mark">foo</span>bar'
1739 sub esc_html_hl_regions {
1740         my ($str, $css_class, @sel) = @_;
1741         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1742         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1743         return esc_html($str, %opts) unless @sel;
1744
1745         my $out = '';
1746         my $pos = 0;
1747
1748         for my $s (@sel) {
1749                 my ($begin, $end) = @$s;
1750
1751                 # Don't create empty <span> elements.
1752                 next if $end <= $begin;
1753
1754                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1755                                        %opts);
1756
1757                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1758                         if ($begin - $pos > 0);
1759                 $out .= $cgi->span({-class => $css_class}, $escaped);
1760
1761                 $pos = $end;
1762         }
1763         $out .= esc_html(substr($str, $pos), %opts)
1764                 if ($pos < length($str));
1765
1766         return $out;
1767 }
1768
1769 # return positions of beginning and end of each match
1770 sub matchpos_list {
1771         my ($str, $regexp) = @_;
1772         return unless (defined $str && defined $regexp);
1773
1774         my @matches;
1775         while ($str =~ /$regexp/g) {
1776                 push @matches, [$-[0], $+[0]];
1777         }
1778         return @matches;
1779 }
1780
1781 # highlight match (if any), and escape HTML
1782 sub esc_html_match_hl {
1783         my ($str, $regexp) = @_;
1784         return esc_html($str) unless defined $regexp;
1785
1786         my @matches = matchpos_list($str, $regexp);
1787         return esc_html($str) unless @matches;
1788
1789         return esc_html_hl_regions($str, 'match', @matches);
1790 }
1791
1792
1793 # highlight match (if any) of shortened string, and escape HTML
1794 sub esc_html_match_hl_chopped {
1795         my ($str, $chopped, $regexp) = @_;
1796         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1797
1798         my @matches = matchpos_list($str, $regexp);
1799         return esc_html($chopped) unless @matches;
1800
1801         # filter matches so that we mark chopped string
1802         my $tail = "... "; # see chop_str
1803         unless ($chopped =~ s/\Q$tail\E$//) {
1804                 $tail = '';
1805         }
1806         my $chop_len = length($chopped);
1807         my $tail_len = length($tail);
1808         my @filtered;
1809
1810         for my $m (@matches) {
1811                 if ($m->[0] > $chop_len) {
1812                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1813                         last;
1814                 } elsif ($m->[1] > $chop_len) {
1815                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1816                         last;
1817                 }
1818                 push @filtered, $m;
1819         }
1820
1821         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1822 }
1823
1824 ## ----------------------------------------------------------------------
1825 ## functions returning short strings
1826
1827 # CSS class for given age value (in seconds)
1828 sub age_class {
1829         my $age = shift;
1830
1831         if (!defined $age) {
1832                 return "noage";
1833         } elsif ($age < 60*60*2) {
1834                 return "age0";
1835         } elsif ($age < 60*60*24*2) {
1836                 return "age1";
1837         } else {
1838                 return "age2";
1839         }
1840 }
1841
1842 # convert age in seconds to "nn units ago" string
1843 sub age_string {
1844         my $age = shift;
1845         my $age_str;
1846
1847         if ($age > 60*60*24*365*2) {
1848                 $age_str = (int $age/60/60/24/365);
1849                 $age_str .= " years ago";
1850         } elsif ($age > 60*60*24*(365/12)*2) {
1851                 $age_str = int $age/60/60/24/(365/12);
1852                 $age_str .= " months ago";
1853         } elsif ($age > 60*60*24*7*2) {
1854                 $age_str = int $age/60/60/24/7;
1855                 $age_str .= " weeks ago";
1856         } elsif ($age > 60*60*24*2) {
1857                 $age_str = int $age/60/60/24;
1858                 $age_str .= " days ago";
1859         } elsif ($age > 60*60*2) {
1860                 $age_str = int $age/60/60;
1861                 $age_str .= " hours ago";
1862         } elsif ($age > 60*2) {
1863                 $age_str = int $age/60;
1864                 $age_str .= " min ago";
1865         } elsif ($age > 2) {
1866                 $age_str = int $age;
1867                 $age_str .= " sec ago";
1868         } else {
1869                 $age_str .= " right now";
1870         }
1871         return $age_str;
1872 }
1873
1874 use constant {
1875         S_IFINVALID => 0030000,
1876         S_IFGITLINK => 0160000,
1877 };
1878
1879 # submodule/subproject, a commit object reference
1880 sub S_ISGITLINK {
1881         my $mode = shift;
1882
1883         return (($mode & S_IFMT) == S_IFGITLINK)
1884 }
1885
1886 # convert file mode in octal to symbolic file mode string
1887 sub mode_str {
1888         my $mode = oct shift;
1889
1890         if (S_ISGITLINK($mode)) {
1891                 return 'm---------';
1892         } elsif (S_ISDIR($mode & S_IFMT)) {
1893                 return 'drwxr-xr-x';
1894         } elsif (S_ISLNK($mode)) {
1895                 return 'lrwxrwxrwx';
1896         } elsif (S_ISREG($mode)) {
1897                 # git cares only about the executable bit
1898                 if ($mode & S_IXUSR) {
1899                         return '-rwxr-xr-x';
1900                 } else {
1901                         return '-rw-r--r--';
1902                 };
1903         } else {
1904                 return '----------';
1905         }
1906 }
1907
1908 # convert file mode in octal to file type string
1909 sub file_type {
1910         my $mode = shift;
1911
1912         if ($mode !~ m/^[0-7]+$/) {
1913                 return $mode;
1914         } else {
1915                 $mode = oct $mode;
1916         }
1917
1918         if (S_ISGITLINK($mode)) {
1919                 return "submodule";
1920         } elsif (S_ISDIR($mode & S_IFMT)) {
1921                 return "directory";
1922         } elsif (S_ISLNK($mode)) {
1923                 return "symlink";
1924         } elsif (S_ISREG($mode)) {
1925                 return "file";
1926         } else {
1927                 return "unknown";
1928         }
1929 }
1930
1931 # convert file mode in octal to file type description string
1932 sub file_type_long {
1933         my $mode = shift;
1934
1935         if ($mode !~ m/^[0-7]+$/) {
1936                 return $mode;
1937         } else {
1938                 $mode = oct $mode;
1939         }
1940
1941         if (S_ISGITLINK($mode)) {
1942                 return "submodule";
1943         } elsif (S_ISDIR($mode & S_IFMT)) {
1944                 return "directory";
1945         } elsif (S_ISLNK($mode)) {
1946                 return "symlink";
1947         } elsif (S_ISREG($mode)) {
1948                 if ($mode & S_IXUSR) {
1949                         return "executable";
1950                 } else {
1951                         return "file";
1952                 };
1953         } else {
1954                 return "unknown";
1955         }
1956 }
1957
1958
1959 ## ----------------------------------------------------------------------
1960 ## functions returning short HTML fragments, or transforming HTML fragments
1961 ## which don't belong to other sections
1962
1963 # format line of commit message.
1964 sub format_log_line_html {
1965         my $line = shift;
1966
1967         $line = esc_html($line, -nbsp=>1);
1968         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1969                 $cgi->a({-href => href(action=>"object", hash=>$1),
1970                                         -class => "text"}, $1);
1971         }eg;
1972
1973         return $line;
1974 }
1975
1976 # format marker of refs pointing to given object
1977
1978 # the destination action is chosen based on object type and current context:
1979 # - for annotated tags, we choose the tag view unless it's the current view
1980 #   already, in which case we go to shortlog view
1981 # - for other refs, we keep the current view if we're in history, shortlog or
1982 #   log view, and select shortlog otherwise
1983 sub format_ref_marker {
1984         my ($refs, $id) = @_;
1985         my $markers = '';
1986
1987         if (defined $refs->{$id}) {
1988                 foreach my $ref (@{$refs->{$id}}) {
1989                         # this code exploits the fact that non-lightweight tags are the
1990                         # only indirect objects, and that they are the only objects for which
1991                         # we want to use tag instead of shortlog as action
1992                         my ($type, $name) = qw();
1993                         my $indirect = ($ref =~ s/\^\{\}$//);
1994                         # e.g. tags/v2.6.11 or heads/next
1995                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1996                                 $type = $1;
1997                                 $name = $2;
1998                         } else {
1999                                 $type = "ref";
2000                                 $name = $ref;
2001                         }
2002
2003                         my $class = $type;
2004                         $class .= " indirect" if $indirect;
2005
2006                         my $dest_action = "shortlog";
2007
2008                         if ($indirect) {
2009                                 $dest_action = "tag" unless $action eq "tag";
2010                         } elsif ($action =~ /^(history|(short)?log)$/) {
2011                                 $dest_action = $action;
2012                         }
2013
2014                         my $dest = "";
2015                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2016                         $dest .= $ref;
2017
2018                         my $link = $cgi->a({
2019                                 -href => href(
2020                                         action=>$dest_action,
2021                                         hash=>$dest
2022                                 )}, $name);
2023
2024                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2025                                 $link . "</span>";
2026                 }
2027         }
2028
2029         if ($markers) {
2030                 return ' <span class="refs">'. $markers . '</span>';
2031         } else {
2032                 return "";
2033         }
2034 }
2035
2036 # format, perhaps shortened and with markers, title line
2037 sub format_subject_html {
2038         my ($long, $short, $href, $extra) = @_;
2039         $extra = '' unless defined($extra);
2040
2041         if (length($short) < length($long)) {
2042                 $long =~ s/[[:cntrl:]]/?/g;
2043                 return $cgi->a({-href => $href, -class => "list subject",
2044                                 -title => to_utf8($long)},
2045                        esc_html($short)) . $extra;
2046         } else {
2047                 return $cgi->a({-href => $href, -class => "list subject"},
2048                        esc_html($long)) . $extra;
2049         }
2050 }
2051
2052 # Rather than recomputing the url for an email multiple times, we cache it
2053 # after the first hit. This gives a visible benefit in views where the avatar
2054 # for the same email is used repeatedly (e.g. shortlog).
2055 # The cache is shared by all avatar engines (currently gravatar only), which
2056 # are free to use it as preferred. Since only one avatar engine is used for any
2057 # given page, there's no risk for cache conflicts.
2058 our %avatar_cache = ();
2059
2060 # Compute the picon url for a given email, by using the picon search service over at
2061 # http://www.cs.indiana.edu/picons/search.html
2062 sub picon_url {
2063         my $email = lc shift;
2064         if (!$avatar_cache{$email}) {
2065                 my ($user, $domain) = split('@', $email);
2066                 $avatar_cache{$email} =
2067                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2068                         "$domain/$user/" .
2069                         "users+domains+unknown/up/single";
2070         }
2071         return $avatar_cache{$email};
2072 }
2073
2074 # Compute the gravatar url for a given email, if it's not in the cache already.
2075 # Gravatar stores only the part of the URL before the size, since that's the
2076 # one computationally more expensive. This also allows reuse of the cache for
2077 # different sizes (for this particular engine).
2078 sub gravatar_url {
2079         my $email = lc shift;
2080         my $size = shift;
2081         $avatar_cache{$email} ||=
2082                 "http://www.gravatar.com/avatar/" .
2083                         Digest::MD5::md5_hex($email) . "?s=";
2084         return $avatar_cache{$email} . $size;
2085 }
2086
2087 # Insert an avatar for the given $email at the given $size if the feature
2088 # is enabled.
2089 sub git_get_avatar {
2090         my ($email, %opts) = @_;
2091         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2092         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2093         $opts{-size} ||= 'default';
2094         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2095         my $url = "";
2096         if ($git_avatar eq 'gravatar') {
2097                 $url = gravatar_url($email, $size);
2098         } elsif ($git_avatar eq 'picon') {
2099                 $url = picon_url($email);
2100         }
2101         # Other providers can be added by extending the if chain, defining $url
2102         # as needed. If no variant puts something in $url, we assume avatars
2103         # are completely disabled/unavailable.
2104         if ($url) {
2105                 return $pre_white .
2106                        "<img width=\"$size\" " .
2107                             "class=\"avatar\" " .
2108                             "src=\"".esc_url($url)."\" " .
2109                             "alt=\"\" " .
2110                        "/>" . $post_white;
2111         } else {
2112                 return "";
2113         }
2114 }
2115
2116 sub format_search_author {
2117         my ($author, $searchtype, $displaytext) = @_;
2118         my $have_search = gitweb_check_feature('search');
2119
2120         if ($have_search) {
2121                 my $performed = "";
2122                 if ($searchtype eq 'author') {
2123                         $performed = "authored";
2124                 } elsif ($searchtype eq 'committer') {
2125                         $performed = "committed";
2126                 }
2127
2128                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2129                                 searchtext=>$author,
2130                                 searchtype=>$searchtype), class=>"list",
2131                                 title=>"Search for commits $performed by $author"},
2132                                 $displaytext);
2133
2134         } else {
2135                 return $displaytext;
2136         }
2137 }
2138
2139 # format the author name of the given commit with the given tag
2140 # the author name is chopped and escaped according to the other
2141 # optional parameters (see chop_str).
2142 sub format_author_html {
2143         my $tag = shift;
2144         my $co = shift;
2145         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2146         return "<$tag class=\"author\">" .
2147                format_search_author($co->{'author_name'}, "author",
2148                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2149                        $author) .
2150                "</$tag>";
2151 }
2152
2153 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2154 sub format_git_diff_header_line {
2155         my $line = shift;
2156         my $diffinfo = shift;
2157         my ($from, $to) = @_;
2158
2159         if ($diffinfo->{'nparents'}) {
2160                 # combined diff
2161                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2162                 if ($to->{'href'}) {
2163                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2164                                          esc_path($to->{'file'}));
2165                 } else { # file was deleted (no href)
2166                         $line .= esc_path($to->{'file'});
2167                 }
2168         } else {
2169                 # "ordinary" diff
2170                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2171                 if ($from->{'href'}) {
2172                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2173                                          'a/' . esc_path($from->{'file'}));
2174                 } else { # file was added (no href)
2175                         $line .= 'a/' . esc_path($from->{'file'});
2176                 }
2177                 $line .= ' ';
2178                 if ($to->{'href'}) {
2179                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2180                                          'b/' . esc_path($to->{'file'}));
2181                 } else { # file was deleted
2182                         $line .= 'b/' . esc_path($to->{'file'});
2183                 }
2184         }
2185
2186         return "<div class=\"diff header\">$line</div>\n";
2187 }
2188
2189 # format extended diff header line, before patch itself
2190 sub format_extended_diff_header_line {
2191         my $line = shift;
2192         my $diffinfo = shift;
2193         my ($from, $to) = @_;
2194
2195         # match <path>
2196         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2197                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2198                                        esc_path($from->{'file'}));
2199         }
2200         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2201                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2202                                  esc_path($to->{'file'}));
2203         }
2204         # match single <mode>
2205         if ($line =~ m/\s(\d{6})$/) {
2206                 $line .= '<span class="info"> (' .
2207                          file_type_long($1) .
2208                          ')</span>';
2209         }
2210         # match <hash>
2211         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2212                 # can match only for combined diff
2213                 $line = 'index ';
2214                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2215                         if ($from->{'href'}[$i]) {
2216                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2217                                                   -class=>"hash"},
2218                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2219                         } else {
2220                                 $line .= '0' x 7;
2221                         }
2222                         # separator
2223                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2224                 }
2225                 $line .= '..';
2226                 if ($to->{'href'}) {
2227                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2228                                          substr($diffinfo->{'to_id'},0,7));
2229                 } else {
2230                         $line .= '0' x 7;
2231                 }
2232
2233         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2234                 # can match only for ordinary diff
2235                 my ($from_link, $to_link);
2236                 if ($from->{'href'}) {
2237                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2238                                              substr($diffinfo->{'from_id'},0,7));
2239                 } else {
2240                         $from_link = '0' x 7;
2241                 }
2242                 if ($to->{'href'}) {
2243                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2244                                            substr($diffinfo->{'to_id'},0,7));
2245                 } else {
2246                         $to_link = '0' x 7;
2247                 }
2248                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2249                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2250         }
2251
2252         return $line . "<br/>\n";
2253 }
2254
2255 # format from-file/to-file diff header
2256 sub format_diff_from_to_header {
2257         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2258         my $line;
2259         my $result = '';
2260
2261         $line = $from_line;
2262         #assert($line =~ m/^---/) if DEBUG;
2263         # no extra formatting for "^--- /dev/null"
2264         if (! $diffinfo->{'nparents'}) {
2265                 # ordinary (single parent) diff
2266                 if ($line =~ m!^--- "?a/!) {
2267                         if ($from->{'href'}) {
2268                                 $line = '--- a/' .
2269                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2270                                                 esc_path($from->{'file'}));
2271                         } else {
2272                                 $line = '--- a/' .
2273                                         esc_path($from->{'file'});
2274                         }
2275                 }
2276                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2277
2278         } else {
2279                 # combined diff (merge commit)
2280                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2281                         if ($from->{'href'}[$i]) {
2282                                 $line = '--- ' .
2283                                         $cgi->a({-href=>href(action=>"blobdiff",
2284                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2285                                                              hash_parent_base=>$parents[$i],
2286                                                              file_parent=>$from->{'file'}[$i],
2287                                                              hash=>$diffinfo->{'to_id'},
2288                                                              hash_base=>$hash,
2289                                                              file_name=>$to->{'file'}),
2290                                                  -class=>"path",
2291                                                  -title=>"diff" . ($i+1)},
2292                                                 $i+1) .
2293                                         '/' .
2294                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2295                                                 esc_path($from->{'file'}[$i]));
2296                         } else {
2297                                 $line = '--- /dev/null';
2298                         }
2299                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2300                 }
2301         }
2302
2303         $line = $to_line;
2304         #assert($line =~ m/^\+\+\+/) if DEBUG;
2305         # no extra formatting for "^+++ /dev/null"
2306         if ($line =~ m!^\+\+\+ "?b/!) {
2307                 if ($to->{'href'}) {
2308                         $line = '+++ b/' .
2309                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2310                                         esc_path($to->{'file'}));
2311                 } else {
2312                         $line = '+++ b/' .
2313                                 esc_path($to->{'file'});
2314                 }
2315         }
2316         $result .= qq!<div class="diff to_file">$line</div>\n!;
2317
2318         return $result;
2319 }
2320
2321 # create note for patch simplified by combined diff
2322 sub format_diff_cc_simplified {
2323         my ($diffinfo, @parents) = @_;
2324         my $result = '';
2325
2326         $result .= "<div class=\"diff header\">" .
2327                    "diff --cc ";
2328         if (!is_deleted($diffinfo)) {
2329                 $result .= $cgi->a({-href => href(action=>"blob",
2330                                                   hash_base=>$hash,
2331                                                   hash=>$diffinfo->{'to_id'},
2332                                                   file_name=>$diffinfo->{'to_file'}),
2333                                     -class => "path"},
2334                                    esc_path($diffinfo->{'to_file'}));
2335         } else {
2336                 $result .= esc_path($diffinfo->{'to_file'});
2337         }
2338         $result .= "</div>\n" . # class="diff header"
2339                    "<div class=\"diff nodifferences\">" .
2340                    "Simple merge" .
2341                    "</div>\n"; # class="diff nodifferences"
2342
2343         return $result;
2344 }
2345
2346 sub diff_line_class {
2347         my ($line, $from, $to) = @_;
2348
2349         # ordinary diff
2350         my $num_sign = 1;
2351         # combined diff
2352         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2353                 $num_sign = scalar @{$from->{'href'}};
2354         }
2355
2356         my @diff_line_classifier = (
2357                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2358                 { regexp => qr/^\\/,               class => "incomplete"  },
2359                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2360                 # classifier for context must come before classifier add/rem,
2361                 # or we would have to use more complicated regexp, for example
2362                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2363                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2364                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2365         );
2366         for my $clsfy (@diff_line_classifier) {
2367                 return $clsfy->{'class'}
2368                         if ($line =~ $clsfy->{'regexp'});
2369         }
2370
2371         # fallback
2372         return "";
2373 }
2374
2375 # assumes that $from and $to are defined and correctly filled,
2376 # and that $line holds a line of chunk header for unified diff
2377 sub format_unidiff_chunk_header {
2378         my ($line, $from, $to) = @_;
2379
2380         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2381                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2382
2383         $from_lines = 0 unless defined $from_lines;
2384         $to_lines   = 0 unless defined $to_lines;
2385
2386         if ($from->{'href'}) {
2387                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2388                                      -class=>"list"}, $from_text);
2389         }
2390         if ($to->{'href'}) {
2391                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2392                                      -class=>"list"}, $to_text);
2393         }
2394         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2395                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2396         return $line;
2397 }
2398
2399 # assumes that $from and $to are defined and correctly filled,
2400 # and that $line holds a line of chunk header for combined diff
2401 sub format_cc_diff_chunk_header {
2402         my ($line, $from, $to) = @_;
2403
2404         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2405         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2406
2407         @from_text = split(' ', $ranges);
2408         for (my $i = 0; $i < @from_text; ++$i) {
2409                 ($from_start[$i], $from_nlines[$i]) =
2410                         (split(',', substr($from_text[$i], 1)), 0);
2411         }
2412
2413         $to_text   = pop @from_text;
2414         $to_start  = pop @from_start;
2415         $to_nlines = pop @from_nlines;
2416
2417         $line = "<span class=\"chunk_info\">$prefix ";
2418         for (my $i = 0; $i < @from_text; ++$i) {
2419                 if ($from->{'href'}[$i]) {
2420                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2421                                           -class=>"list"}, $from_text[$i]);
2422                 } else {
2423                         $line .= $from_text[$i];
2424                 }
2425                 $line .= " ";
2426         }
2427         if ($to->{'href'}) {
2428                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2429                                   -class=>"list"}, $to_text);
2430         } else {
2431                 $line .= $to_text;
2432         }
2433         $line .= " $prefix</span>" .
2434                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2435         return $line;
2436 }
2437
2438 # process patch (diff) line (not to be used for diff headers),
2439 # returning HTML-formatted (but not wrapped) line.
2440 # If the line is passed as a reference, it is treated as HTML and not
2441 # esc_html()'ed.
2442 sub format_diff_line {
2443         my ($line, $diff_class, $from, $to) = @_;
2444
2445         if (ref($line)) {
2446                 $line = $$line;
2447         } else {
2448                 chomp $line;
2449                 $line = untabify($line);
2450
2451                 if ($from && $to && $line =~ m/^\@{2} /) {
2452                         $line = format_unidiff_chunk_header($line, $from, $to);
2453                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2454                         $line = format_cc_diff_chunk_header($line, $from, $to);
2455                 } else {
2456                         $line = esc_html($line, -nbsp=>1);
2457                 }
2458         }
2459
2460         my $diff_classes = "diff";
2461         $diff_classes .= " $diff_class" if ($diff_class);
2462         $line = "<div class=\"$diff_classes\">$line</div>\n";
2463
2464         return $line;
2465 }
2466
2467 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2468 # linked.  Pass the hash of the tree/commit to snapshot.
2469 sub format_snapshot_links {
2470         my ($hash) = @_;
2471         my $num_fmts = @snapshot_fmts;
2472         if ($num_fmts > 1) {
2473                 # A parenthesized list of links bearing format names.
2474                 # e.g. "snapshot (_tar.gz_ _zip_)"
2475                 return "snapshot (" . join(' ', map
2476                         $cgi->a({
2477                                 -href => href(
2478                                         action=>"snapshot",
2479                                         hash=>$hash,
2480                                         snapshot_format=>$_
2481                                 )
2482                         }, $known_snapshot_formats{$_}{'display'})
2483                 , @snapshot_fmts) . ")";
2484         } elsif ($num_fmts == 1) {
2485                 # A single "snapshot" link whose tooltip bears the format name.
2486                 # i.e. "_snapshot_"
2487                 my ($fmt) = @snapshot_fmts;
2488                 return
2489                         $cgi->a({
2490                                 -href => href(
2491                                         action=>"snapshot",
2492                                         hash=>$hash,
2493                                         snapshot_format=>$fmt
2494                                 ),
2495                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2496                         }, "snapshot");
2497         } else { # $num_fmts == 0
2498                 return undef;
2499         }
2500 }
2501
2502 ## ......................................................................
2503 ## functions returning values to be passed, perhaps after some
2504 ## transformation, to other functions; e.g. returning arguments to href()
2505
2506 # returns hash to be passed to href to generate gitweb URL
2507 # in -title key it returns description of link
2508 sub get_feed_info {
2509         my $format = shift || 'Atom';
2510         my %res = (action => lc($format));
2511
2512         # feed links are possible only for project views
2513         return unless (defined $project);
2514         # some views should link to OPML, or to generic project feed,
2515         # or don't have specific feed yet (so they should use generic)
2516         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2517
2518         my $branch;
2519         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2520         # from tag links; this also makes possible to detect branch links
2521         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2522             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2523                 $branch = $1;
2524         }
2525         # find log type for feed description (title)
2526         my $type = 'log';
2527         if (defined $file_name) {
2528                 $type  = "history of $file_name";
2529                 $type .= "/" if ($action eq 'tree');
2530                 $type .= " on '$branch'" if (defined $branch);
2531         } else {
2532                 $type = "log of $branch" if (defined $branch);
2533         }
2534
2535         $res{-title} = $type;
2536         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2537         $res{'file_name'} = $file_name;
2538
2539         return %res;
2540 }
2541
2542 ## ----------------------------------------------------------------------
2543 ## git utility subroutines, invoking git commands
2544
2545 # returns path to the core git executable and the --git-dir parameter as list
2546 sub git_cmd {
2547         $number_of_git_cmds++;
2548         return $GIT, '--git-dir='.$git_dir;
2549 }
2550
2551 # quote the given arguments for passing them to the shell
2552 # quote_command("command", "arg 1", "arg with ' and ! characters")
2553 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2554 # Try to avoid using this function wherever possible.
2555 sub quote_command {
2556         return join(' ',
2557                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2558 }
2559
2560 # get HEAD ref of given project as hash
2561 sub git_get_head_hash {
2562         return git_get_full_hash(shift, 'HEAD');
2563 }
2564
2565 sub git_get_full_hash {
2566         return git_get_hash(@_);
2567 }
2568
2569 sub git_get_short_hash {
2570         return git_get_hash(@_, '--short=7');
2571 }
2572
2573 sub git_get_hash {
2574         my ($project, $hash, @options) = @_;
2575         my $o_git_dir = $git_dir;
2576         my $retval = undef;
2577         $git_dir = "$projectroot/$project";
2578         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2579             '--verify', '-q', @options, $hash) {
2580                 $retval = <$fd>;
2581                 chomp $retval if defined $retval;
2582                 close $fd;
2583         }
2584         if (defined $o_git_dir) {
2585                 $git_dir = $o_git_dir;
2586         }
2587         return $retval;
2588 }
2589
2590 # get type of given object
2591 sub git_get_type {
2592         my $hash = shift;
2593
2594         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2595         my $type = <$fd>;
2596         close $fd or return;
2597         chomp $type;
2598         return $type;
2599 }
2600
2601 # repository configuration
2602 our $config_file = '';
2603 our %config;
2604
2605 # store multiple values for single key as anonymous array reference
2606 # single values stored directly in the hash, not as [ <value> ]
2607 sub hash_set_multi {
2608         my ($hash, $key, $value) = @_;
2609
2610         if (!exists $hash->{$key}) {
2611                 $hash->{$key} = $value;
2612         } elsif (!ref $hash->{$key}) {
2613                 $hash->{$key} = [ $hash->{$key}, $value ];
2614         } else {
2615                 push @{$hash->{$key}}, $value;
2616         }
2617 }
2618
2619 # return hash of git project configuration
2620 # optionally limited to some section, e.g. 'gitweb'
2621 sub git_parse_project_config {
2622         my $section_regexp = shift;
2623         my %config;
2624
2625         local $/ = "\0";
2626
2627         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2628                 or return;
2629
2630         while (my $keyval = <$fh>) {
2631                 chomp $keyval;
2632                 my ($key, $value) = split(/\n/, $keyval, 2);
2633
2634                 hash_set_multi(\%config, $key, $value)
2635                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2636         }
2637         close $fh;
2638
2639         return %config;
2640 }
2641
2642 # convert config value to boolean: 'true' or 'false'
2643 # no value, number > 0, 'true' and 'yes' values are true
2644 # rest of values are treated as false (never as error)
2645 sub config_to_bool {
2646         my $val = shift;
2647
2648         return 1 if !defined $val;             # section.key
2649
2650         # strip leading and trailing whitespace
2651         $val =~ s/^\s+//;
2652         $val =~ s/\s+$//;
2653
2654         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2655                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2656 }
2657
2658 # convert config value to simple decimal number
2659 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2660 # to be multiplied by 1024, 1048576, or 1073741824
2661 sub config_to_int {
2662         my $val = shift;
2663
2664         # strip leading and trailing whitespace
2665         $val =~ s/^\s+//;
2666         $val =~ s/\s+$//;
2667
2668         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2669                 $unit = lc($unit);
2670                 # unknown unit is treated as 1
2671                 return $num * ($unit eq 'g' ? 1073741824 :
2672                                $unit eq 'm' ?    1048576 :
2673                                $unit eq 'k' ?       1024 : 1);
2674         }
2675         return $val;
2676 }
2677
2678 # convert config value to array reference, if needed
2679 sub config_to_multi {
2680         my $val = shift;
2681
2682         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2683 }
2684
2685 sub git_get_project_config {
2686         my ($key, $type) = @_;
2687
2688         return unless defined $git_dir;
2689
2690         # key sanity check
2691         return unless ($key);
2692         # only subsection, if exists, is case sensitive,
2693         # and not lowercased by 'git config -z -l'
2694         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2695                 $key = join(".", lc($hi), $mi, lc($lo));
2696         } else {
2697                 $key = lc($key);
2698         }
2699         $key =~ s/^gitweb\.//;
2700         return if ($key =~ m/\W/);
2701
2702         # type sanity check
2703         if (defined $type) {
2704                 $type =~ s/^--//;
2705                 $type = undef
2706                         unless ($type eq 'bool' || $type eq 'int');
2707         }
2708
2709         # get config
2710         if (!defined $config_file ||
2711             $config_file ne "$git_dir/config") {
2712                 %config = git_parse_project_config('gitweb');
2713                 $config_file = "$git_dir/config";
2714         }
2715
2716         # check if config variable (key) exists
2717         return unless exists $config{"gitweb.$key"};
2718
2719         # ensure given type
2720         if (!defined $type) {
2721                 return $config{"gitweb.$key"};
2722         } elsif ($type eq 'bool') {
2723                 # backward compatibility: 'git config --bool' returns true/false
2724                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2725         } elsif ($type eq 'int') {
2726                 return config_to_int($config{"gitweb.$key"});
2727         }
2728         return $config{"gitweb.$key"};
2729 }
2730
2731 # get hash of given path at given ref
2732 sub git_get_hash_by_path {
2733         my $base = shift;
2734         my $path = shift || return undef;
2735         my $type = shift;
2736
2737         $path =~ s,/+$,,;
2738
2739         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2740                 or die_error(500, "Open git-ls-tree failed");
2741         my $line = <$fd>;
2742         close $fd or return undef;
2743
2744         if (!defined $line) {
2745                 # there is no tree or hash given by $path at $base
2746                 return undef;
2747         }
2748
2749         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2750         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2751         if (defined $type && $type ne $2) {
2752                 # type doesn't match
2753                 return undef;
2754         }
2755         return $3;
2756 }
2757
2758 # get path of entry with given hash at given tree-ish (ref)
2759 # used to get 'from' filename for combined diff (merge commit) for renames
2760 sub git_get_path_by_hash {
2761         my $base = shift || return;
2762         my $hash = shift || return;
2763
2764         local $/ = "\0";
2765
2766         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2767                 or return undef;
2768         while (my $line = <$fd>) {
2769                 chomp $line;
2770
2771                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2772                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2773                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2774                         close $fd;
2775                         return $1;
2776                 }
2777         }
2778         close $fd;
2779         return undef;
2780 }
2781
2782 ## ......................................................................
2783 ## git utility functions, directly accessing git repository
2784
2785 # get the value of config variable either from file named as the variable
2786 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2787 # configuration variable in the repository config file.
2788 sub git_get_file_or_project_config {
2789         my ($path, $name) = @_;
2790
2791         $git_dir = "$projectroot/$path";
2792         open my $fd, '<', "$git_dir/$name"
2793                 or return git_get_project_config($name);
2794         my $conf = <$fd>;
2795         close $fd;
2796         if (defined $conf) {
2797                 chomp $conf;
2798         }
2799         return $conf;
2800 }
2801
2802 sub git_get_project_description {
2803         my $path = shift;
2804         return git_get_file_or_project_config($path, 'description');
2805 }
2806
2807 sub git_get_project_category {
2808         my $path = shift;
2809         return git_get_file_or_project_config($path, 'category');
2810 }
2811
2812
2813 # supported formats:
2814 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2815 #   - if its contents is a number, use it as tag weight,
2816 #   - otherwise add a tag with weight 1
2817 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2818 #   the same value multiple times increases tag weight
2819 # * `gitweb.ctag' multi-valued repo config variable
2820 sub git_get_project_ctags {
2821         my $project = shift;
2822         my $ctags = {};
2823
2824         $git_dir = "$projectroot/$project";
2825         if (opendir my $dh, "$git_dir/ctags") {
2826                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2827                 foreach my $tagfile (@files) {
2828                         open my $ct, '<', $tagfile
2829                                 or next;
2830                         my $val = <$ct>;
2831                         chomp $val if $val;
2832                         close $ct;
2833
2834                         (my $ctag = $tagfile) =~ s#.*/##;
2835                         if ($val =~ /^\d+$/) {
2836                                 $ctags->{$ctag} = $val;
2837                         } else {
2838                                 $ctags->{$ctag} = 1;
2839                         }
2840                 }
2841                 closedir $dh;
2842
2843         } elsif (open my $fh, '<', "$git_dir/ctags") {
2844                 while (my $line = <$fh>) {
2845                         chomp $line;
2846                         $ctags->{$line}++ if $line;
2847                 }
2848                 close $fh;
2849
2850         } else {
2851                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2852                 foreach my $tag (@$taglist) {
2853                         $ctags->{$tag}++;
2854                 }
2855         }
2856
2857         return $ctags;
2858 }
2859
2860 # return hash, where keys are content tags ('ctags'),
2861 # and values are sum of weights of given tag in every project
2862 sub git_gather_all_ctags {
2863         my $projects = shift;
2864         my $ctags = {};
2865
2866         foreach my $p (@$projects) {
2867                 foreach my $ct (keys %{$p->{'ctags'}}) {
2868                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2869                 }
2870         }
2871
2872         return $ctags;
2873 }
2874
2875 sub git_populate_project_tagcloud {
2876         my $ctags = shift;
2877
2878         # First, merge different-cased tags; tags vote on casing
2879         my %ctags_lc;
2880         foreach (keys %$ctags) {
2881                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2882                 if (not $ctags_lc{lc $_}->{topcount}
2883                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2884                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2885                         $ctags_lc{lc $_}->{topname} = $_;
2886                 }
2887         }
2888
2889         my $cloud;
2890         my $matched = $input_params{'ctag'};
2891         if (eval { require HTML::TagCloud; 1; }) {
2892                 $cloud = HTML::TagCloud->new;
2893                 foreach my $ctag (sort keys %ctags_lc) {
2894                         # Pad the title with spaces so that the cloud looks
2895                         # less crammed.
2896                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2897                         $title =~ s/ /&nbsp;/g;
2898                         $title =~ s/^/&nbsp;/g;
2899                         $title =~ s/$/&nbsp;/g;
2900                         if (defined $matched && $matched eq $ctag) {
2901                                 $title = qq(<span class="match">$title</span>);
2902                         }
2903                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2904                                     $ctags_lc{$ctag}->{count});
2905                 }
2906         } else {
2907                 $cloud = {};
2908                 foreach my $ctag (keys %ctags_lc) {
2909                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2910                         if (defined $matched && $matched eq $ctag) {
2911                                 $title = qq(<span class="match">$title</span>);
2912                         }
2913                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2914                         $cloud->{$ctag}{ctag} =
2915                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2916                 }
2917         }
2918         return $cloud;
2919 }
2920
2921 sub git_show_project_tagcloud {
2922         my ($cloud, $count) = @_;
2923         if (ref $cloud eq 'HTML::TagCloud') {
2924                 return $cloud->html_and_css($count);
2925         } else {
2926                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2927                 return
2928                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2929                         join (', ', map {
2930                                 $cloud->{$_}->{'ctag'}
2931                         } splice(@tags, 0, $count)) .
2932                         '</div>';
2933         }
2934 }
2935
2936 sub git_get_project_url_list {
2937         my $path = shift;
2938
2939         $git_dir = "$projectroot/$path";
2940         open my $fd, '<', "$git_dir/cloneurl"
2941                 or return wantarray ?
2942                 @{ config_to_multi(git_get_project_config('url')) } :
2943                    config_to_multi(git_get_project_config('url'));
2944         my @git_project_url_list = map { chomp; $_ } <$fd>;
2945         close $fd;
2946
2947         return wantarray ? @git_project_url_list : \@git_project_url_list;
2948 }
2949
2950 sub git_get_projects_list {
2951         my $filter = shift || '';
2952         my $paranoid = shift;
2953         my @list;
2954
2955         if (-d $projects_list) {
2956                 # search in directory
2957                 my $dir = $projects_list;
2958                 # remove the trailing "/"
2959                 $dir =~ s!/+$!!;
2960                 my $pfxlen = length("$dir");
2961                 my $pfxdepth = ($dir =~ tr!/!!);
2962                 # when filtering, search only given subdirectory
2963                 if ($filter && !$paranoid) {
2964                         $dir .= "/$filter";
2965                         $dir =~ s!/+$!!;
2966                 }
2967
2968                 File::Find::find({
2969                         follow_fast => 1, # follow symbolic links
2970                         follow_skip => 2, # ignore duplicates
2971                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2972                         wanted => sub {
2973                                 # global variables
2974                                 our $project_maxdepth;
2975                                 our $projectroot;
2976                                 # skip project-list toplevel, if we get it.
2977                                 return if (m!^[/.]$!);
2978                                 # only directories can be git repositories
2979                                 return unless (-d $_);
2980                                 # don't traverse too deep (Find is super slow on os x)
2981                                 # $project_maxdepth excludes depth of $projectroot
2982                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2983                                         $File::Find::prune = 1;
2984                                         return;
2985                                 }
2986
2987                                 my $path = substr($File::Find::name, $pfxlen + 1);
2988                                 # paranoidly only filter here
2989                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2990                                         next;
2991                                 }
2992                                 # we check related file in $projectroot
2993                                 if (check_export_ok("$projectroot/$path")) {
2994                                         push @list, { path => $path };
2995                                         $File::Find::prune = 1;
2996                                 }
2997                         },
2998                 }, "$dir");
2999
3000         } elsif (-f $projects_list) {
3001                 # read from file(url-encoded):
3002                 # 'git%2Fgit.git Linus+Torvalds'
3003                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3004                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3005                 open my $fd, '<', $projects_list or return;
3006         PROJECT:
3007                 while (my $line = <$fd>) {
3008                         chomp $line;
3009                         my ($path, $owner) = split ' ', $line;
3010                         $path = unescape($path);
3011                         $owner = unescape($owner);
3012                         if (!defined $path) {
3013                                 next;
3014                         }
3015                         # if $filter is rpovided, check if $path begins with $filter
3016                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3017                                 next;
3018                         }
3019                         if (check_export_ok("$projectroot/$path")) {
3020                                 my $pr = {
3021                                         path => $path
3022                                 };
3023                                 if ($owner) {
3024                                         $pr->{'owner'} = to_utf8($owner);
3025                                 }
3026                                 push @list, $pr;
3027                         }
3028                 }
3029                 close $fd;
3030         }
3031         return @list;
3032 }
3033
3034 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3035 # as side effects it sets 'forks' field to list of forks for forked projects
3036 sub filter_forks_from_projects_list {
3037         my $projects = shift;
3038
3039         my %trie; # prefix tree of directories (path components)
3040         # generate trie out of those directories that might contain forks
3041         foreach my $pr (@$projects) {
3042                 my $path = $pr->{'path'};
3043                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3044                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3045                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3046                 next unless (-d "$projectroot/$path"); # containing directory exists
3047                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3048
3049                 # add to trie
3050                 my @dirs = split('/', $path);
3051                 # walk the trie, until either runs out of components or out of trie
3052                 my $ref = \%trie;
3053                 while (scalar @dirs &&
3054                        exists($ref->{$dirs[0]})) {
3055                         $ref = $ref->{shift @dirs};
3056                 }
3057                 # create rest of trie structure from rest of components
3058                 foreach my $dir (@dirs) {
3059                         $ref = $ref->{$dir} = {};
3060                 }
3061                 # create end marker, store $pr as a data
3062                 $ref->{''} = $pr if (!exists $ref->{''});
3063         }
3064
3065         # filter out forks, by finding shortest prefix match for paths
3066         my @filtered;
3067  PROJECT:
3068         foreach my $pr (@$projects) {
3069                 # trie lookup
3070                 my $ref = \%trie;
3071         DIR:
3072                 foreach my $dir (split('/', $pr->{'path'})) {
3073                         if (exists $ref->{''}) {
3074                                 # found [shortest] prefix, is a fork - skip it
3075                                 push @{$ref->{''}{'forks'}}, $pr;
3076                                 next PROJECT;
3077                         }
3078                         if (!exists $ref->{$dir}) {
3079                                 # not in trie, cannot have prefix, not a fork
3080                                 push @filtered, $pr;
3081                                 next PROJECT;
3082                         }
3083                         # If the dir is there, we just walk one step down the trie.
3084                         $ref = $ref->{$dir};
3085                 }
3086                 # we ran out of trie
3087                 # (shouldn't happen: it's either no match, or end marker)
3088                 push @filtered, $pr;
3089         }
3090
3091         return @filtered;
3092 }
3093
3094 # note: fill_project_list_info must be run first,
3095 # for 'descr_long' and 'ctags' to be filled
3096 sub search_projects_list {
3097         my ($projlist, %opts) = @_;
3098         my $tagfilter  = $opts{'tagfilter'};
3099         my $search_re = $opts{'search_regexp'};
3100
3101         return @$projlist
3102                 unless ($tagfilter || $search_re);
3103
3104         # searching projects require filling to be run before it;
3105         fill_project_list_info($projlist,
3106                                $tagfilter  ? 'ctags' : (),
3107                                $search_re ? ('path', 'descr') : ());
3108         my @projects;
3109  PROJECT:
3110         foreach my $pr (@$projlist) {
3111
3112                 if ($tagfilter) {
3113                         next unless ref($pr->{'ctags'}) eq 'HASH';
3114                         next unless
3115                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3116                 }
3117
3118                 if ($search_re) {
3119                         next unless
3120                                 $pr->{'path'} =~ /$search_re/ ||
3121                                 $pr->{'descr_long'} =~ /$search_re/;
3122                 }
3123
3124                 push @projects, $pr;
3125         }
3126
3127         return @projects;
3128 }
3129
3130 our $gitweb_project_owner = undef;
3131 sub git_get_project_list_from_file {
3132
3133         return if (defined $gitweb_project_owner);
3134
3135         $gitweb_project_owner = {};
3136         # read from file (url-encoded):
3137         # 'git%2Fgit.git Linus+Torvalds'
3138         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3139         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3140         if (-f $projects_list) {
3141                 open(my $fd, '<', $projects_list);
3142                 while (my $line = <$fd>) {
3143                         chomp $line;
3144                         my ($pr, $ow) = split ' ', $line;
3145                         $pr = unescape($pr);
3146                         $ow = unescape($ow);
3147                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3148                 }
3149                 close $fd;
3150         }
3151 }
3152
3153 sub git_get_project_owner {
3154         my $project = shift;
3155         my $owner;
3156
3157         return undef unless $project;
3158         $git_dir = "$projectroot/$project";
3159
3160         if (!defined $gitweb_project_owner) {
3161                 git_get_project_list_from_file();
3162         }
3163
3164         if (exists $gitweb_project_owner->{$project}) {
3165                 $owner = $gitweb_project_owner->{$project};
3166         }
3167         if (!defined $owner){
3168                 $owner = git_get_project_config('owner');
3169         }
3170         if (!defined $owner) {
3171                 $owner = get_file_owner("$git_dir");
3172         }
3173
3174         return $owner;
3175 }
3176
3177 sub git_get_last_activity {
3178         my ($path) = @_;
3179         my $fd;
3180
3181         $git_dir = "$projectroot/$path";
3182         open($fd, "-|", git_cmd(), 'for-each-ref',
3183              '--format=%(committer)',
3184              '--sort=-committerdate',
3185              '--count=1',
3186              'refs/heads') or return;
3187         my $most_recent = <$fd>;
3188         close $fd or return;
3189         if (defined $most_recent &&
3190             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3191                 my $timestamp = $1;
3192                 my $age = time - $timestamp;
3193                 return ($age, age_string($age));
3194         }
3195         return (undef, undef);
3196 }
3197
3198 # Implementation note: when a single remote is wanted, we cannot use 'git
3199 # remote show -n' because that command always work (assuming it's a remote URL
3200 # if it's not defined), and we cannot use 'git remote show' because that would
3201 # try to make a network roundtrip. So the only way to find if that particular
3202 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3203 # and when we find what we want.
3204 sub git_get_remotes_list {
3205         my $wanted = shift;
3206         my %remotes = ();
3207
3208         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3209         return unless $fd;
3210         while (my $remote = <$fd>) {
3211                 chomp $remote;
3212                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3213                 next if $wanted and not $remote eq $wanted;
3214                 my ($url, $key) = ($1, $2);
3215
3216                 $remotes{$remote} ||= { 'heads' => () };
3217                 $remotes{$remote}{$key} = $url;
3218         }
3219         close $fd or return;
3220         return wantarray ? %remotes : \%remotes;
3221 }
3222
3223 # Takes a hash of remotes as first parameter and fills it by adding the
3224 # available remote heads for each of the indicated remotes.
3225 sub fill_remote_heads {
3226         my $remotes = shift;
3227         my @heads = map { "remotes/$_" } keys %$remotes;
3228         my @remoteheads = git_get_heads_list(undef, @heads);
3229         foreach my $remote (keys %$remotes) {
3230                 $remotes->{$remote}{'heads'} = [ grep {
3231                         $_->{'name'} =~ s!^$remote/!!
3232                         } @remoteheads ];
3233         }
3234 }
3235
3236 sub git_get_references {
3237         my $type = shift || "";
3238         my %refs;
3239         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3240         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3241         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3242                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3243                 or return;
3244
3245         while (my $line = <$fd>) {
3246                 chomp $line;
3247                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3248                         if (defined $refs{$1}) {
3249                                 push @{$refs{$1}}, $2;
3250                         } else {
3251                                 $refs{$1} = [ $2 ];
3252                         }
3253                 }
3254         }
3255         close $fd or return;
3256         return \%refs;
3257 }
3258
3259 sub git_get_rev_name_tags {
3260         my $hash = shift || return undef;
3261
3262         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3263                 or return;
3264         my $name_rev = <$fd>;
3265         close $fd;
3266
3267         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3268                 return $1;
3269         } else {
3270                 # catches also '$hash undefined' output
3271                 return undef;
3272         }
3273 }
3274
3275 ## ----------------------------------------------------------------------
3276 ## parse to hash functions
3277
3278 sub parse_date {
3279         my $epoch = shift;
3280         my $tz = shift || "-0000";
3281
3282         my %date;
3283         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3284         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3285         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3286         $date{'hour'} = $hour;
3287         $date{'minute'} = $min;
3288         $date{'mday'} = $mday;
3289         $date{'day'} = $days[$wday];
3290         $date{'month'} = $months[$mon];
3291         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3292                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3293         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3294                              $mday, $months[$mon], $hour ,$min;
3295         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3296                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3297
3298         my ($tz_sign, $tz_hour, $tz_min) =
3299                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3300         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3301         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3302         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3303         $date{'hour_local'} = $hour;
3304         $date{'minute_local'} = $min;
3305         $date{'tz_local'} = $tz;
3306         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3307                                   1900+$year, $mon+1, $mday,
3308                                   $hour, $min, $sec, $tz);
3309         return %date;
3310 }
3311
3312 sub parse_tag {
3313         my $tag_id = shift;
3314         my %tag;
3315         my @comment;
3316
3317         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3318         $tag{'id'} = $tag_id;
3319         while (my $line = <$fd>) {
3320                 chomp $line;
3321                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3322                         $tag{'object'} = $1;
3323                 } elsif ($line =~ m/^type (.+)$/) {
3324                         $tag{'type'} = $1;
3325                 } elsif ($line =~ m/^tag (.+)$/) {
3326                         $tag{'name'} = $1;
3327                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3328                         $tag{'author'} = $1;
3329                         $tag{'author_epoch'} = $2;
3330                         $tag{'author_tz'} = $3;
3331                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3332                                 $tag{'author_name'}  = $1;
3333                                 $tag{'author_email'} = $2;
3334                         } else {
3335                                 $tag{'author_name'} = $tag{'author'};
3336                         }
3337                 } elsif ($line =~ m/--BEGIN/) {
3338                         push @comment, $line;
3339                         last;
3340                 } elsif ($line eq "") {
3341                         last;
3342                 }
3343         }
3344         push @comment, <$fd>;
3345         $tag{'comment'} = \@comment;
3346         close $fd or return;
3347         if (!defined $tag{'name'}) {
3348                 return
3349         };
3350         return %tag
3351 }
3352
3353 sub parse_commit_text {
3354         my ($commit_text, $withparents) = @_;
3355         my @commit_lines = split '\n', $commit_text;
3356         my %co;
3357
3358         pop @commit_lines; # Remove '\0'
3359
3360         if (! @commit_lines) {
3361                 return;
3362         }
3363
3364         my $header = shift @commit_lines;
3365         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3366                 return;
3367         }
3368         ($co{'id'}, my @parents) = split ' ', $header;
3369         while (my $line = shift @commit_lines) {
3370                 last if $line eq "\n";
3371                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3372                         $co{'tree'} = $1;
3373                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3374                         push @parents, $1;
3375                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3376                         $co{'author'} = to_utf8($1);
3377                         $co{'author_epoch'} = $2;
3378                         $co{'author_tz'} = $3;
3379                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3380                                 $co{'author_name'}  = $1;
3381                                 $co{'author_email'} = $2;
3382                         } else {
3383                                 $co{'author_name'} = $co{'author'};
3384                         }
3385                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3386                         $co{'committer'} = to_utf8($1);
3387                         $co{'committer_epoch'} = $2;
3388                         $co{'committer_tz'} = $3;
3389                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3390                                 $co{'committer_name'}  = $1;
3391                                 $co{'committer_email'} = $2;
3392                         } else {
3393                                 $co{'committer_name'} = $co{'committer'};
3394                         }
3395                 }
3396         }
3397         if (!defined $co{'tree'}) {
3398                 return;
3399         };
3400         $co{'parents'} = \@parents;
3401         $co{'parent'} = $parents[0];
3402
3403         foreach my $title (@commit_lines) {
3404                 $title =~ s/^    //;
3405                 if ($title ne "") {
3406                         $co{'title'} = chop_str($title, 80, 5);
3407                         # remove leading stuff of merges to make the interesting part visible
3408                         if (length($title) > 50) {
3409                                 $title =~ s/^Automatic //;
3410                                 $title =~ s/^merge (of|with) /Merge ... /i;
3411                                 if (length($title) > 50) {
3412                                         $title =~ s/(http|rsync):\/\///;
3413                                 }
3414                                 if (length($title) > 50) {
3415                                         $title =~ s/(master|www|rsync)\.//;
3416                                 }
3417                                 if (length($title) > 50) {
3418                                         $title =~ s/kernel.org:?//;
3419                                 }
3420                                 if (length($title) > 50) {
3421                                         $title =~ s/\/pub\/scm//;
3422                                 }
3423                         }
3424                         $co{'title_short'} = chop_str($title, 50, 5);
3425                         last;
3426                 }
3427         }
3428         if (! defined $co{'title'} || $co{'title'} eq "") {
3429                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3430         }
3431         # remove added spaces
3432         foreach my $line (@commit_lines) {
3433                 $line =~ s/^    //;
3434         }
3435         $co{'comment'} = \@commit_lines;
3436
3437         my $age = time - $co{'committer_epoch'};
3438         $co{'age'} = $age;
3439         $co{'age_string'} = age_string($age);
3440         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3441         if ($age > 60*60*24*7*2) {
3442                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3443                 $co{'age_string_age'} = $co{'age_string'};
3444         } else {
3445                 $co{'age_string_date'} = $co{'age_string'};
3446                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3447         }
3448         return %co;
3449 }
3450
3451 sub parse_commit {
3452         my ($commit_id) = @_;
3453         my %co;
3454
3455         local $/ = "\0";
3456
3457         open my $fd, "-|", git_cmd(), "rev-list",
3458                 "--parents",
3459                 "--header",
3460                 "--max-count=1",
3461                 $commit_id,
3462                 "--",
3463                 or die_error(500, "Open git-rev-list failed");
3464         %co = parse_commit_text(<$fd>, 1);
3465         close $fd;
3466
3467         return %co;
3468 }
3469
3470 sub parse_commits {
3471         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3472         my @cos;
3473
3474         $maxcount ||= 1;
3475         $skip ||= 0;
3476
3477         local $/ = "\0";
3478
3479         open my $fd, "-|", git_cmd(), "rev-list",
3480                 "--header",
3481                 @args,
3482                 ("--max-count=" . $maxcount),
3483                 ("--skip=" . $skip),
3484                 @extra_options,
3485                 $commit_id,
3486                 "--",
3487                 ($filename ? ($filename) : ())
3488                 or die_error(500, "Open git-rev-list failed");
3489         while (my $line = <$fd>) {
3490                 my %co = parse_commit_text($line);
3491                 push @cos, \%co;
3492         }
3493         close $fd;
3494
3495         return wantarray ? @cos : \@cos;
3496 }
3497
3498 # parse line of git-diff-tree "raw" output
3499 sub parse_difftree_raw_line {
3500         my $line = shift;
3501         my %res;
3502
3503         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3504         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3505         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3506                 $res{'from_mode'} = $1;
3507                 $res{'to_mode'} = $2;
3508                 $res{'from_id'} = $3;
3509                 $res{'to_id'} = $4;
3510                 $res{'status'} = $5;
3511                 $res{'similarity'} = $6;
3512                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3513                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3514                 } else {
3515                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3516                 }
3517         }
3518         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3519         # combined diff (for merge commit)
3520         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3521                 $res{'nparents'}  = length($1);
3522                 $res{'from_mode'} = [ split(' ', $2) ];
3523                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3524                 $res{'from_id'} = [ split(' ', $3) ];
3525                 $res{'to_id'} = pop @{$res{'from_id'}};
3526                 $res{'status'} = [ split('', $4) ];
3527                 $res{'to_file'} = unquote($5);
3528         }
3529         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3530         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3531                 $res{'commit'} = $1;
3532         }
3533
3534         return wantarray ? %res : \%res;
3535 }
3536
3537 # wrapper: return parsed line of git-diff-tree "raw" output
3538 # (the argument might be raw line, or parsed info)
3539 sub parsed_difftree_line {
3540         my $line_or_ref = shift;
3541
3542         if (ref($line_or_ref) eq "HASH") {
3543                 # pre-parsed (or generated by hand)
3544                 return $line_or_ref;
3545         } else {
3546                 return parse_difftree_raw_line($line_or_ref);
3547         }
3548 }
3549
3550 # parse line of git-ls-tree output
3551 sub parse_ls_tree_line {
3552         my $line = shift;
3553         my %opts = @_;
3554         my %res;
3555
3556         if ($opts{'-l'}) {
3557                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3558                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3559
3560                 $res{'mode'} = $1;
3561                 $res{'type'} = $2;
3562                 $res{'hash'} = $3;
3563                 $res{'size'} = $4;
3564                 if ($opts{'-z'}) {
3565                         $res{'name'} = $5;
3566                 } else {
3567                         $res{'name'} = unquote($5);
3568                 }
3569         } else {
3570                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3571                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3572
3573                 $res{'mode'} = $1;
3574                 $res{'type'} = $2;
3575                 $res{'hash'} = $3;
3576                 if ($opts{'-z'}) {
3577                         $res{'name'} = $4;
3578                 } else {
3579                         $res{'name'} = unquote($4);
3580                 }
3581         }
3582
3583         return wantarray ? %res : \%res;
3584 }
3585
3586 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3587 sub parse_from_to_diffinfo {
3588         my ($diffinfo, $from, $to, @parents) = @_;
3589
3590         if ($diffinfo->{'nparents'}) {
3591                 # combined diff
3592                 $from->{'file'} = [];
3593                 $from->{'href'} = [];
3594                 fill_from_file_info($diffinfo, @parents)
3595                         unless exists $diffinfo->{'from_file'};
3596                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3597                         $from->{'file'}[$i] =
3598                                 defined $diffinfo->{'from_file'}[$i] ?
3599                                         $diffinfo->{'from_file'}[$i] :
3600                                         $diffinfo->{'to_file'};
3601                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3602                                 $from->{'href'}[$i] = href(action=>"blob",
3603                                                            hash_base=>$parents[$i],
3604                                                            hash=>$diffinfo->{'from_id'}[$i],
3605                                                            file_name=>$from->{'file'}[$i]);
3606                         } else {
3607                                 $from->{'href'}[$i] = undef;
3608                         }
3609                 }
3610         } else {
3611                 # ordinary (not combined) diff
3612                 $from->{'file'} = $diffinfo->{'from_file'};
3613                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3614                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3615                                                hash=>$diffinfo->{'from_id'},
3616                                                file_name=>$from->{'file'});
3617                 } else {
3618                         delete $from->{'href'};
3619                 }
3620         }
3621
3622         $to->{'file'} = $diffinfo->{'to_file'};
3623         if (!is_deleted($diffinfo)) { # file exists in result
3624                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3625                                      hash=>$diffinfo->{'to_id'},
3626                                      file_name=>$to->{'file'});
3627         } else {
3628                 delete $to->{'href'};
3629         }
3630 }
3631
3632 ## ......................................................................
3633 ## parse to array of hashes functions
3634
3635 sub git_get_heads_list {
3636         my ($limit, @classes) = @_;
3637         @classes = ('heads') unless @classes;
3638         my @patterns = map { "refs/$_" } @classes;
3639         my @headslist;
3640
3641         open my $fd, '-|', git_cmd(), 'for-each-ref',
3642                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3643                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3644                 @patterns
3645                 or return;
3646         while (my $line = <$fd>) {
3647                 my %ref_item;
3648
3649                 chomp $line;
3650                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3651                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3652                 my ($committer, $epoch, $tz) =
3653                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3654                 $ref_item{'fullname'}  = $name;
3655                 $name =~ s!^refs/(?:head|remote)s/!!;
3656
3657                 $ref_item{'name'}  = $name;
3658                 $ref_item{'id'}    = $hash;
3659                 $ref_item{'title'} = $title || '(no commit message)';
3660                 $ref_item{'epoch'} = $epoch;
3661                 if ($epoch) {
3662                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3663                 } else {
3664                         $ref_item{'age'} = "unknown";
3665                 }
3666
3667                 push @headslist, \%ref_item;
3668         }
3669         close $fd;
3670
3671         return wantarray ? @headslist : \@headslist;
3672 }
3673
3674 sub git_get_tags_list {
3675         my $limit = shift;
3676         my @tagslist;
3677
3678         open my $fd, '-|', git_cmd(), 'for-each-ref',
3679                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3680                 '--format=%(objectname) %(objecttype) %(refname) '.
3681                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3682                 'refs/tags'
3683                 or return;
3684         while (my $line = <$fd>) {
3685                 my %ref_item;
3686
3687                 chomp $line;
3688                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3689                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3690                 my ($creator, $epoch, $tz) =
3691                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3692                 $ref_item{'fullname'} = $name;
3693                 $name =~ s!^refs/tags/!!;
3694
3695                 $ref_item{'type'} = $type;
3696                 $ref_item{'id'} = $id;
3697                 $ref_item{'name'} = $name;
3698                 if ($type eq "tag") {
3699                         $ref_item{'subject'} = $title;
3700                         $ref_item{'reftype'} = $reftype;
3701                         $ref_item{'refid'}   = $refid;
3702                 } else {
3703                         $ref_item{'reftype'} = $type;
3704                         $ref_item{'refid'}   = $id;
3705                 }
3706
3707                 if ($type eq "tag" || $type eq "commit") {
3708                         $ref_item{'epoch'} = $epoch;
3709                         if ($epoch) {
3710                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3711                         } else {
3712                                 $ref_item{'age'} = "unknown";
3713                         }
3714                 }
3715
3716                 push @tagslist, \%ref_item;
3717         }
3718         close $fd;
3719
3720         return wantarray ? @tagslist : \@tagslist;
3721 }
3722
3723 ## ----------------------------------------------------------------------
3724 ## filesystem-related functions
3725
3726 sub get_file_owner {
3727         my $path = shift;
3728
3729         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3730         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3731         if (!defined $gcos) {
3732                 return undef;
3733         }
3734         my $owner = $gcos;
3735         $owner =~ s/[,;].*$//;
3736         return to_utf8($owner);
3737 }
3738
3739 # assume that file exists
3740 sub insert_file {
3741         my $filename = shift;
3742
3743         open my $fd, '<', $filename;
3744         print map { to_utf8($_) } <$fd>;
3745         close $fd;
3746 }
3747
3748 ## ......................................................................
3749 ## mimetype related functions
3750
3751 sub mimetype_guess_file {
3752         my $filename = shift;
3753         my $mimemap = shift;
3754         -r $mimemap or return undef;
3755
3756         my %mimemap;
3757         open(my $mh, '<', $mimemap) or return undef;
3758         while (<$mh>) {
3759                 next if m/^#/; # skip comments
3760                 my ($mimetype, @exts) = split(/\s+/);
3761                 foreach my $ext (@exts) {
3762                         $mimemap{$ext} = $mimetype;
3763                 }
3764         }
3765         close($mh);
3766
3767         $filename =~ /\.([^.]*)$/;
3768         return $mimemap{$1};
3769 }
3770
3771 sub mimetype_guess {
3772         my $filename = shift;
3773         my $mime;
3774         $filename =~ /\./ or return undef;
3775
3776         if ($mimetypes_file) {
3777                 my $file = $mimetypes_file;
3778                 if ($file !~ m!^/!) { # if it is relative path
3779                         # it is relative to project
3780                         $file = "$projectroot/$project/$file";
3781                 }
3782                 $mime = mimetype_guess_file($filename, $file);
3783         }
3784         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3785         return $mime;
3786 }
3787
3788 sub blob_mimetype {
3789         my $fd = shift;
3790         my $filename = shift;
3791
3792         if ($filename) {
3793                 my $mime = mimetype_guess($filename);
3794                 $mime and return $mime;
3795         }
3796
3797         # just in case
3798         return $default_blob_plain_mimetype unless $fd;
3799
3800         if (-T $fd) {
3801                 return 'text/plain';
3802         } elsif (! $filename) {
3803                 return 'application/octet-stream';
3804         } elsif ($filename =~ m/\.png$/i) {
3805                 return 'image/png';
3806         } elsif ($filename =~ m/\.gif$/i) {
3807                 return 'image/gif';
3808         } elsif ($filename =~ m/\.jpe?g$/i) {
3809                 return 'image/jpeg';
3810         } else {
3811                 return 'application/octet-stream';
3812         }
3813 }
3814
3815 sub blob_contenttype {
3816         my ($fd, $file_name, $type) = @_;
3817
3818         $type ||= blob_mimetype($fd, $file_name);
3819         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3820                 $type .= "; charset=$default_text_plain_charset";
3821         }
3822
3823         return $type;
3824 }
3825
3826 # guess file syntax for syntax highlighting; return undef if no highlighting
3827 # the name of syntax can (in the future) depend on syntax highlighter used
3828 sub guess_file_syntax {
3829         my ($highlight, $mimetype, $file_name) = @_;
3830         return undef unless ($highlight && defined $file_name);
3831         my $basename = basename($file_name, '.in');
3832         return $highlight_basename{$basename}
3833                 if exists $highlight_basename{$basename};
3834
3835         $basename =~ /\.([^.]*)$/;
3836         my $ext = $1 or return undef;
3837         return $highlight_ext{$ext}
3838                 if exists $highlight_ext{$ext};
3839
3840         return undef;
3841 }
3842
3843 # run highlighter and return FD of its output,
3844 # or return original FD if no highlighting
3845 sub run_highlighter {
3846         my ($fd, $highlight, $syntax) = @_;
3847         return $fd unless ($highlight && defined $syntax);
3848
3849         close $fd;
3850         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3851                   quote_command($highlight_bin).
3852                   " --replace-tabs=8 --fragment --syntax $syntax |"
3853                 or die_error(500, "Couldn't open file or run syntax highlighter");
3854         return $fd;
3855 }
3856
3857 ## ======================================================================
3858 ## functions printing HTML: header, footer, error page
3859
3860 sub get_page_title {
3861         my $title = to_utf8($site_name);
3862
3863         unless (defined $project) {
3864                 if (defined $project_filter) {
3865                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3866                 }
3867                 return $title;
3868         }
3869         $title .= " - " . to_utf8($project);
3870
3871         return $title unless (defined $action);
3872         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3873
3874         return $title unless (defined $file_name);
3875         $title .= " - " . esc_path($file_name);
3876         if ($action eq "tree" && $file_name !~ m|/$|) {
3877                 $title .= "/";
3878         }
3879
3880         return $title;
3881 }
3882
3883 sub get_content_type_html {
3884         # require explicit support from the UA if we are to send the page as
3885         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3886         # we have to do this because MSIE sometimes globs '*/*', pretending to
3887         # support xhtml+xml but choking when it gets what it asked for.
3888         if (defined $cgi->http('HTTP_ACCEPT') &&
3889             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3890             $cgi->Accept('application/xhtml+xml') != 0) {
3891                 return 'application/xhtml+xml';
3892         } else {
3893                 return 'text/html';
3894         }
3895 }
3896
3897 sub print_feed_meta {
3898         if (defined $project) {
3899                 my %href_params = get_feed_info();
3900                 if (!exists $href_params{'-title'}) {
3901                         $href_params{'-title'} = 'log';
3902                 }
3903
3904                 foreach my $format (qw(RSS Atom)) {
3905                         my $type = lc($format);
3906                         my %link_attr = (
3907                                 '-rel' => 'alternate',
3908                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3909                                 '-type' => "application/$type+xml"
3910                         );
3911
3912                         $href_params{'extra_options'} = undef;
3913                         $href_params{'action'} = $type;
3914                         $link_attr{'-href'} = href(%href_params);
3915                         print "<link ".
3916                               "rel=\"$link_attr{'-rel'}\" ".
3917                               "title=\"$link_attr{'-title'}\" ".
3918                               "href=\"$link_attr{'-href'}\" ".
3919                               "type=\"$link_attr{'-type'}\" ".
3920                               "/>\n";
3921
3922                         $href_params{'extra_options'} = '--no-merges';
3923                         $link_attr{'-href'} = href(%href_params);
3924                         $link_attr{'-title'} .= ' (no merges)';
3925                         print "<link ".
3926                               "rel=\"$link_attr{'-rel'}\" ".
3927                               "title=\"$link_attr{'-title'}\" ".
3928                               "href=\"$link_attr{'-href'}\" ".
3929                               "type=\"$link_attr{'-type'}\" ".
3930                               "/>\n";
3931                 }
3932
3933         } else {
3934                 printf('<link rel="alternate" title="%s projects list" '.
3935                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3936                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3937                 printf('<link rel="alternate" title="%s projects feeds" '.
3938                        'href="%s" type="text/x-opml" />'."\n",
3939                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3940         }
3941 }
3942
3943 sub print_header_links {
3944         my $status = shift;
3945
3946         # print out each stylesheet that exist, providing backwards capability
3947         # for those people who defined $stylesheet in a config file
3948         if (defined $stylesheet) {
3949                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3950         } else {
3951                 foreach my $stylesheet (@stylesheets) {
3952                         next unless $stylesheet;
3953                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3954                 }
3955         }
3956         print_feed_meta()
3957                 if ($status eq '200 OK');
3958         if (defined $favicon) {
3959                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3960         }
3961 }
3962
3963 sub print_nav_breadcrumbs_path {
3964         my $dirprefix = undef;
3965         while (my $part = shift) {
3966                 $dirprefix .= "/" if defined $dirprefix;
3967                 $dirprefix .= $part;
3968                 print $cgi->a({-href => href(project => undef,
3969                                              project_filter => $dirprefix,
3970                                              action => "project_list")},
3971                               esc_html($part)) . " / ";
3972         }
3973 }
3974
3975 sub print_nav_breadcrumbs {
3976         my %opts = @_;
3977
3978         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3979         if (defined $project) {
3980                 my @dirname = split '/', $project;
3981                 my $projectbasename = pop @dirname;
3982                 print_nav_breadcrumbs_path(@dirname);
3983                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3984                 if (defined $action) {
3985                         my $action_print = $action ;
3986                         if (defined $opts{-action_extra}) {
3987                                 $action_print = $cgi->a({-href => href(action=>$action)},
3988                                         $action);
3989                         }
3990                         print " / $action_print";
3991                 }
3992                 if (defined $opts{-action_extra}) {
3993                         print " / $opts{-action_extra}";
3994                 }
3995                 print "\n";
3996         } elsif (defined $project_filter) {
3997                 print_nav_breadcrumbs_path(split '/', $project_filter);
3998         }
3999 }
4000
4001 sub print_search_form {
4002         if (!defined $searchtext) {
4003                 $searchtext = "";
4004         }
4005         my $search_hash;
4006         if (defined $hash_base) {
4007                 $search_hash = $hash_base;
4008         } elsif (defined $hash) {
4009                 $search_hash = $hash;
4010         } else {
4011                 $search_hash = "HEAD";
4012         }
4013         my $action = $my_uri;
4014         my $use_pathinfo = gitweb_check_feature('pathinfo');
4015         if ($use_pathinfo) {
4016                 $action .= "/".esc_url($project);
4017         }
4018         print $cgi->startform(-method => "get", -action => $action) .
4019               "<div class=\"search\">\n" .
4020               (!$use_pathinfo &&
4021               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4022               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4023               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4024               $cgi->popup_menu(-name => 'st', -default => 'commit',
4025                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4026               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4027               " search:\n",
4028               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4029               "<span title=\"Extended regular expression\">" .
4030               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4031                              -checked => $search_use_regexp) .
4032               "</span>" .
4033               "</div>" .
4034               $cgi->end_form() . "\n";
4035 }
4036
4037 sub git_header_html {
4038         my $status = shift || "200 OK";
4039         my $expires = shift;
4040         my %opts = @_;
4041
4042         my $title = get_page_title();
4043         my $content_type = get_content_type_html();
4044         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4045                            -status=> $status, -expires => $expires)
4046                 unless ($opts{'-no_http_header'});
4047         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4048         print <<EOF;
4049 <?xml version="1.0" encoding="utf-8"?>
4050 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4051 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4052 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4053 <!-- git core binaries version $git_version -->
4054 <head>
4055 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4056 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4057 <meta name="robots" content="index, nofollow"/>
4058 <title>$title</title>
4059 EOF
4060         # the stylesheet, favicon etc urls won't work correctly with path_info
4061         # unless we set the appropriate base URL
4062         if ($ENV{'PATH_INFO'}) {
4063                 print "<base href=\"".esc_url($base_url)."\" />\n";
4064         }
4065         print_header_links($status);
4066
4067         if (defined $site_html_head_string) {
4068                 print to_utf8($site_html_head_string);
4069         }
4070
4071         print "</head>\n" .
4072               "<body>\n";
4073
4074         if (defined $site_header && -f $site_header) {
4075                 insert_file($site_header);
4076         }
4077
4078         print "<div class=\"page_header\">\n";
4079         if (defined $logo) {
4080                 print $cgi->a({-href => esc_url($logo_url),
4081                                -title => $logo_label},
4082                               $cgi->img({-src => esc_url($logo),
4083                                          -width => 72, -height => 27,
4084                                          -alt => "git",
4085                                          -class => "logo"}));
4086         }
4087         print_nav_breadcrumbs(%opts);
4088         print "</div>\n";
4089
4090         my $have_search = gitweb_check_feature('search');
4091         if (defined $project && $have_search) {
4092                 print_search_form();
4093         }
4094 }
4095
4096 sub git_footer_html {
4097         my $feed_class = 'rss_logo';
4098
4099         print "<div class=\"page_footer\">\n";
4100         if (defined $project) {
4101                 my $descr = git_get_project_description($project);
4102                 if (defined $descr) {
4103                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4104                 }
4105
4106                 my %href_params = get_feed_info();
4107                 if (!%href_params) {
4108                         $feed_class .= ' generic';
4109                 }
4110                 $href_params{'-title'} ||= 'log';
4111
4112                 foreach my $format (qw(RSS Atom)) {
4113                         $href_params{'action'} = lc($format);
4114                         print $cgi->a({-href => href(%href_params),
4115                                       -title => "$href_params{'-title'} $format feed",
4116                                       -class => $feed_class}, $format)."\n";
4117                 }
4118
4119         } else {
4120                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4121                                              project_filter => $project_filter),
4122                               -class => $feed_class}, "OPML") . " ";
4123                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4124                                              project_filter => $project_filter),
4125                               -class => $feed_class}, "TXT") . "\n";
4126         }
4127         print "</div>\n"; # class="page_footer"
4128
4129         if (defined $t0 && gitweb_check_feature('timed')) {
4130                 print "<div id=\"generating_info\">\n";
4131                 print 'This page took '.
4132                       '<span id="generating_time" class="time_span">'.
4133                       tv_interval($t0, [ gettimeofday() ]).
4134                       ' seconds </span>'.
4135                       ' and '.
4136                       '<span id="generating_cmd">'.
4137                       $number_of_git_cmds.
4138                       '</span> git commands '.
4139                       " to generate.\n";
4140                 print "</div>\n"; # class="page_footer"
4141         }
4142
4143         if (defined $site_footer && -f $site_footer) {
4144                 insert_file($site_footer);
4145         }
4146
4147         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4148         if (defined $action &&
4149             $action eq 'blame_incremental') {
4150                 print qq!<script type="text/javascript">\n!.
4151                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4152                       qq!           "!. href() .qq!");\n!.
4153                       qq!</script>\n!;
4154         } else {
4155                 my ($jstimezone, $tz_cookie, $datetime_class) =
4156                         gitweb_get_feature('javascript-timezone');
4157
4158                 print qq!<script type="text/javascript">\n!.
4159                       qq!window.onload = function () {\n!;
4160                 if (gitweb_check_feature('javascript-actions')) {
4161                         print qq!       fixLinks();\n!;
4162                 }
4163                 if ($jstimezone && $tz_cookie && $datetime_class) {
4164                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4165                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4166                 }
4167                 print qq!};\n!.
4168                       qq!</script>\n!;
4169         }
4170
4171         print "</body>\n" .
4172               "</html>";
4173 }
4174
4175 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4176 # Example: die_error(404, 'Hash not found')
4177 # By convention, use the following status codes (as defined in RFC 2616):
4178 # 400: Invalid or missing CGI parameters, or
4179 #      requested object exists but has wrong type.
4180 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4181 #      this server or project.
4182 # 404: Requested object/revision/project doesn't exist.
4183 # 500: The server isn't configured properly, or
4184 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4185 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4186 # 503: The server is currently unavailable (because it is overloaded,
4187 #      or down for maintenance).  Generally, this is a temporary state.
4188 sub die_error {
4189         my $status = shift || 500;
4190         my $error = esc_html(shift) || "Internal Server Error";
4191         my $extra = shift;
4192         my %opts = @_;
4193
4194         my %http_responses = (
4195                 400 => '400 Bad Request',
4196                 403 => '403 Forbidden',
4197                 404 => '404 Not Found',
4198                 500 => '500 Internal Server Error',
4199                 503 => '503 Service Unavailable',
4200         );
4201         git_header_html($http_responses{$status}, undef, %opts);
4202         print <<EOF;
4203 <div class="page_body">
4204 <br /><br />
4205 $status - $error
4206 <br />
4207 EOF
4208         if (defined $extra) {
4209                 print "<hr />\n" .
4210                       "$extra\n";
4211         }
4212         print "</div>\n";
4213
4214         git_footer_html();
4215         goto DONE_GITWEB
4216                 unless ($opts{'-error_handler'});
4217 }
4218
4219 ## ----------------------------------------------------------------------
4220 ## functions printing or outputting HTML: navigation
4221
4222 sub git_print_page_nav {
4223         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4224         $extra = '' if !defined $extra; # pager or formats
4225
4226         my @navs = qw(summary shortlog log commit commitdiff tree);
4227         if ($suppress) {
4228                 @navs = grep { $_ ne $suppress } @navs;
4229         }
4230
4231         my %arg = map { $_ => {action=>$_} } @navs;
4232         if (defined $head) {
4233                 for (qw(commit commitdiff)) {
4234                         $arg{$_}{'hash'} = $head;
4235                 }
4236                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4237                         for (qw(shortlog log)) {
4238                                 $arg{$_}{'hash'} = $head;
4239                         }
4240                 }
4241         }
4242
4243         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4244         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4245
4246         my @actions = gitweb_get_feature('actions');
4247         my %repl = (
4248                 '%' => '%',
4249                 'n' => $project,         # project name
4250                 'f' => $git_dir,         # project path within filesystem
4251                 'h' => $treehead || '',  # current hash ('h' parameter)
4252                 'b' => $treebase || '',  # hash base ('hb' parameter)
4253         );
4254         while (@actions) {
4255                 my ($label, $link, $pos) = splice(@actions,0,3);
4256                 # insert
4257                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4258                 # munch munch
4259                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4260                 $arg{$label}{'_href'} = $link;
4261         }
4262
4263         print "<div class=\"page_nav\">\n" .
4264                 (join " | ",
4265                  map { $_ eq $current ?
4266                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4267                  } @navs);
4268         print "<br/>\n$extra<br/>\n" .
4269               "</div>\n";
4270 }
4271
4272 # returns a submenu for the nagivation of the refs views (tags, heads,
4273 # remotes) with the current view disabled and the remotes view only
4274 # available if the feature is enabled
4275 sub format_ref_views {
4276         my ($current) = @_;
4277         my @ref_views = qw{tags heads};
4278         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4279         return join " | ", map {
4280                 $_ eq $current ? $_ :
4281                 $cgi->a({-href => href(action=>$_)}, $_)
4282         } @ref_views
4283 }
4284
4285 sub format_paging_nav {
4286         my ($action, $page, $has_next_link) = @_;
4287         my $paging_nav;
4288
4289
4290         if ($page > 0) {
4291                 $paging_nav .=
4292                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4293                         " &sdot; " .
4294                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4295                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4296         } else {
4297                 $paging_nav .= "first &sdot; prev";
4298         }
4299
4300         if ($has_next_link) {
4301                 $paging_nav .= " &sdot; " .
4302                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4303                                  -accesskey => "n", -title => "Alt-n"}, "next");
4304         } else {
4305                 $paging_nav .= " &sdot; next";
4306         }
4307
4308         return $paging_nav;
4309 }
4310
4311 ## ......................................................................
4312 ## functions printing or outputting HTML: div
4313
4314 sub git_print_header_div {
4315         my ($action, $title, $hash, $hash_base) = @_;
4316         my %args = ();
4317
4318         $args{'action'} = $action;
4319         $args{'hash'} = $hash if $hash;
4320         $args{'hash_base'} = $hash_base if $hash_base;
4321
4322         print "<div class=\"header\">\n" .
4323               $cgi->a({-href => href(%args), -class => "title"},
4324               $title ? $title : $action) .
4325               "\n</div>\n";
4326 }
4327
4328 sub format_repo_url {
4329         my ($name, $url) = @_;
4330         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4331 }
4332
4333 # Group output by placing it in a DIV element and adding a header.
4334 # Options for start_div() can be provided by passing a hash reference as the
4335 # first parameter to the function.
4336 # Options to git_print_header_div() can be provided by passing an array
4337 # reference. This must follow the options to start_div if they are present.
4338 # The content can be a scalar, which is output as-is, a scalar reference, which
4339 # is output after html escaping, an IO handle passed either as *handle or
4340 # *handle{IO}, or a function reference. In the latter case all following
4341 # parameters will be taken as argument to the content function call.
4342 sub git_print_section {
4343         my ($div_args, $header_args, $content);
4344         my $arg = shift;
4345         if (ref($arg) eq 'HASH') {
4346                 $div_args = $arg;
4347                 $arg = shift;
4348         }
4349         if (ref($arg) eq 'ARRAY') {
4350                 $header_args = $arg;
4351                 $arg = shift;
4352         }
4353         $content = $arg;
4354
4355         print $cgi->start_div($div_args);
4356         git_print_header_div(@$header_args);
4357
4358         if (ref($content) eq 'CODE') {
4359                 $content->(@_);
4360         } elsif (ref($content) eq 'SCALAR') {
4361                 print esc_html($$content);
4362         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4363                 print <$content>;
4364         } elsif (!ref($content) && defined($content)) {
4365                 print $content;
4366         }
4367
4368         print $cgi->end_div;
4369 }
4370
4371 sub format_timestamp_html {
4372         my $date = shift;
4373         my $strtime = $date->{'rfc2822'};
4374
4375         my (undef, undef, $datetime_class) =
4376                 gitweb_get_feature('javascript-timezone');
4377         if ($datetime_class) {
4378                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4379         }
4380
4381         my $localtime_format = '(%02d:%02d %s)';
4382         if ($date->{'hour_local'} < 6) {
4383                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4384         }
4385         $strtime .= ' ' .
4386                     sprintf($localtime_format,
4387                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4388
4389         return $strtime;
4390 }
4391
4392 # Outputs the author name and date in long form
4393 sub git_print_authorship {
4394         my $co = shift;
4395         my %opts = @_;
4396         my $tag = $opts{-tag} || 'div';
4397         my $author = $co->{'author_name'};
4398
4399         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4400         print "<$tag class=\"author_date\">" .
4401               format_search_author($author, "author", esc_html($author)) .
4402               " [".format_timestamp_html(\%ad)."]".
4403               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4404               "</$tag>\n";
4405 }
4406
4407 # Outputs table rows containing the full author or committer information,
4408 # in the format expected for 'commit' view (& similar).
4409 # Parameters are a commit hash reference, followed by the list of people
4410 # to output information for. If the list is empty it defaults to both
4411 # author and committer.
4412 sub git_print_authorship_rows {
4413         my $co = shift;
4414         # too bad we can't use @people = @_ || ('author', 'committer')
4415         my @people = @_;
4416         @people = ('author', 'committer') unless @people;
4417         foreach my $who (@people) {
4418                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4419                 print "<tr><td>$who</td><td>" .
4420                       format_search_author($co->{"${who}_name"}, $who,
4421                                            esc_html($co->{"${who}_name"})) . " " .
4422                       format_search_author($co->{"${who}_email"}, $who,
4423                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4424                       "</td><td rowspan=\"2\">" .
4425                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4426                       "</td></tr>\n" .
4427                       "<tr>" .
4428                       "<td></td><td>" .
4429                       format_timestamp_html(\%wd) .
4430                       "</td>" .
4431                       "</tr>\n";
4432         }
4433 }
4434
4435 sub git_print_page_path {
4436         my $name = shift;
4437         my $type = shift;
4438         my $hb = shift;
4439
4440
4441         print "<div class=\"page_path\">";
4442         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4443                       -title => 'tree root'}, to_utf8("[$project]"));
4444         print " / ";
4445         if (defined $name) {
4446                 my @dirname = split '/', $name;
4447                 my $basename = pop @dirname;
4448                 my $fullname = '';
4449
4450                 foreach my $dir (@dirname) {
4451                         $fullname .= ($fullname ? '/' : '') . $dir;
4452                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4453                                                      hash_base=>$hb),
4454                                       -title => $fullname}, esc_path($dir));
4455                         print " / ";
4456                 }
4457                 if (defined $type && $type eq 'blob') {
4458                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4459                                                      hash_base=>$hb),
4460                                       -title => $name}, esc_path($basename));
4461                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4462 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4463 <script>
4464 function toggleLineNumbers() {
4465         e = document.getElementById("lineNoStyle");
4466         e2 = document.getElementById("lineNoToggle");
4467         if (e2.innerHTML == "[Hide line numbers]") {
4468                 e.innerHTML = ".linenr { display:none; }";
4469                 e2.innerHTML = "[Show line numbers]";
4470         }
4471         else {
4472                 e.innerHTML = "";
4473                 e2.innerHTML = "[Hide line numbers]";
4474         }
4475 }
4476 document.getElementsByTagName("head")[0].innerHTML += "<style id=\'lineNoStyle\'></style>";
4477 toggleLineNumbers();
4478 </script>
4479 ';
4480                 } elsif (defined $type && $type eq 'tree') {
4481                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4482                                                      hash_base=>$hb),
4483                                       -title => $name}, esc_path($basename));
4484                         print " / ";
4485                 } else {
4486                         print esc_path($basename);
4487                 }
4488         }
4489         print "<br/></div>\n";
4490 }
4491
4492 sub git_print_log {
4493         my $log = shift;
4494         my %opts = @_;
4495
4496         if ($opts{'-remove_title'}) {
4497                 # remove title, i.e. first line of log
4498                 shift @$log;
4499         }
4500         # remove leading empty lines
4501         while (defined $log->[0] && $log->[0] eq "") {
4502                 shift @$log;
4503         }
4504
4505         # print log
4506         my $signoff = 0;
4507         my $empty = 0;
4508         foreach my $line (@$log) {
4509                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4510                         $signoff = 1;
4511                         $empty = 0;
4512                         if (! $opts{'-remove_signoff'}) {
4513                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4514                                 next;
4515                         } else {
4516                                 # remove signoff lines
4517                                 next;
4518                         }
4519                 } else {
4520                         $signoff = 0;
4521                 }
4522
4523                 # print only one empty line
4524                 # do not print empty line after signoff
4525                 if ($line eq "") {
4526                         next if ($empty || $signoff);
4527                         $empty = 1;
4528                 } else {
4529                         $empty = 0;
4530                 }
4531
4532                 print format_log_line_html($line) . "<br/>\n";
4533         }
4534
4535         if ($opts{'-final_empty_line'}) {
4536                 # end with single empty line
4537                 print "<br/>\n" unless $empty;
4538         }
4539 }
4540
4541 # return link target (what link points to)
4542 sub git_get_link_target {
4543         my $hash = shift;
4544         my $link_target;
4545
4546         # read link
4547         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4548                 or return;
4549         {
4550                 local $/ = undef;
4551                 $link_target = <$fd>;
4552         }
4553         close $fd
4554                 or return;
4555
4556         return $link_target;
4557 }
4558
4559 # given link target, and the directory (basedir) the link is in,
4560 # return target of link relative to top directory (top tree);
4561 # return undef if it is not possible (including absolute links).
4562 sub normalize_link_target {
4563         my ($link_target, $basedir) = @_;
4564
4565         # absolute symlinks (beginning with '/') cannot be normalized
4566         return if (substr($link_target, 0, 1) eq '/');
4567
4568         # normalize link target to path from top (root) tree (dir)
4569         my $path;
4570         if ($basedir) {
4571                 $path = $basedir . '/' . $link_target;
4572         } else {
4573                 # we are in top (root) tree (dir)
4574                 $path = $link_target;
4575         }
4576
4577         # remove //, /./, and /../
4578         my @path_parts;
4579         foreach my $part (split('/', $path)) {
4580                 # discard '.' and ''
4581                 next if (!$part || $part eq '.');
4582                 # handle '..'
4583                 if ($part eq '..') {
4584                         if (@path_parts) {
4585                                 pop @path_parts;
4586                         } else {
4587                                 # link leads outside repository (outside top dir)
4588                                 return;
4589                         }
4590                 } else {
4591                         push @path_parts, $part;
4592                 }
4593         }
4594         $path = join('/', @path_parts);
4595
4596         return $path;
4597 }
4598
4599 # print tree entry (row of git_tree), but without encompassing <tr> element
4600 sub git_print_tree_entry {
4601         my ($t, $basedir, $hash_base, $have_blame) = @_;
4602
4603         my %base_key = ();
4604         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4605
4606         # The format of a table row is: mode list link.  Where mode is
4607         # the mode of the entry, list is the name of the entry, an href,
4608         # and link is the action links of the entry.
4609
4610         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4611         if (exists $t->{'size'}) {
4612                 print "<td class=\"size\">$t->{'size'}</td>\n";
4613         }
4614         if ($t->{'type'} eq "blob") {
4615                 print "<td class=\"list\">" .
4616                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4617                                                file_name=>"$basedir$t->{'name'}", %base_key),
4618                                 -class => "list"}, esc_path($t->{'name'}));
4619                 if (S_ISLNK(oct $t->{'mode'})) {
4620                         my $link_target = git_get_link_target($t->{'hash'});
4621                         if ($link_target) {
4622                                 my $norm_target = normalize_link_target($link_target, $basedir);
4623                                 if (defined $norm_target) {
4624                                         print " -> " .
4625                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4626                                                                      file_name=>$norm_target),
4627                                                        -title => $norm_target}, esc_path($link_target));
4628                                 } else {
4629                                         print " -> " . esc_path($link_target);
4630                                 }
4631                         }
4632                 }
4633                 print "</td>\n";
4634                 print "<td class=\"link\">";
4635                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4636                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4637                               "blob");
4638                 if ($have_blame) {
4639                         print " | " .
4640                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4641                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4642                                       "blame");
4643                 }
4644                 if (defined $hash_base) {
4645                         print " | " .
4646                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4647                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4648                                       "history");
4649                 }
4650                 print " | " .
4651                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4652                                                file_name=>"$basedir$t->{'name'}")},
4653                                 "raw");
4654                 print "</td>\n";
4655
4656         } elsif ($t->{'type'} eq "tree") {
4657                 print "<td class=\"list\">";
4658                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4659                                              file_name=>"$basedir$t->{'name'}",
4660                                              %base_key)},
4661                               esc_path($t->{'name'}));
4662                 print "</td>\n";
4663                 print "<td class=\"link\">";
4664                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4665                                              file_name=>"$basedir$t->{'name'}",
4666                                              %base_key)},
4667                               "tree");
4668                 if (defined $hash_base) {
4669                         print " | " .
4670                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4671                                                      file_name=>"$basedir$t->{'name'}")},
4672                                       "history");
4673                 }
4674                 print "</td>\n";
4675         } else {
4676                 # unknown object: we can only present history for it
4677                 # (this includes 'commit' object, i.e. submodule support)
4678                 print "<td class=\"list\">" .
4679                       esc_path($t->{'name'}) .
4680                       "</td>\n";
4681                 print "<td class=\"link\">";
4682                 if (defined $hash_base) {
4683                         print $cgi->a({-href => href(action=>"history",
4684                                                      hash_base=>$hash_base,
4685                                                      file_name=>"$basedir$t->{'name'}")},
4686                                       "history");
4687                 }
4688                 print "</td>\n";
4689         }
4690 }
4691
4692 ## ......................................................................
4693 ## functions printing large fragments of HTML
4694
4695 # get pre-image filenames for merge (combined) diff
4696 sub fill_from_file_info {
4697         my ($diff, @parents) = @_;
4698
4699         $diff->{'from_file'} = [ ];
4700         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4701         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4702                 if ($diff->{'status'}[$i] eq 'R' ||
4703                     $diff->{'status'}[$i] eq 'C') {
4704                         $diff->{'from_file'}[$i] =
4705                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4706                 }
4707         }
4708
4709         return $diff;
4710 }
4711
4712 # is current raw difftree line of file deletion
4713 sub is_deleted {
4714         my $diffinfo = shift;
4715
4716         return $diffinfo->{'to_id'} eq ('0' x 40);
4717 }
4718
4719 # does patch correspond to [previous] difftree raw line
4720 # $diffinfo  - hashref of parsed raw diff format
4721 # $patchinfo - hashref of parsed patch diff format
4722 #              (the same keys as in $diffinfo)
4723 sub is_patch_split {
4724         my ($diffinfo, $patchinfo) = @_;
4725
4726         return defined $diffinfo && defined $patchinfo
4727                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4728 }
4729
4730
4731 sub git_difftree_body {
4732         my ($difftree, $hash, @parents) = @_;
4733         my ($parent) = $parents[0];
4734         my $have_blame = gitweb_check_feature('blame');
4735         print "<div class=\"list_head\">\n";
4736         if ($#{$difftree} > 10) {
4737                 print(($#{$difftree} + 1) . " files changed:\n");
4738         }
4739         print "</div>\n";
4740
4741         print "<table class=\"" .
4742               (@parents > 1 ? "combined " : "") .
4743               "diff_tree\">\n";
4744
4745         # header only for combined diff in 'commitdiff' view
4746         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4747         if ($has_header) {
4748                 # table header
4749                 print "<thead><tr>\n" .
4750                        "<th></th><th></th>\n"; # filename, patchN link
4751                 for (my $i = 0; $i < @parents; $i++) {
4752                         my $par = $parents[$i];
4753                         print "<th>" .
4754                               $cgi->a({-href => href(action=>"commitdiff",
4755                                                      hash=>$hash, hash_parent=>$par),
4756                                        -title => 'commitdiff to parent number ' .
4757                                                   ($i+1) . ': ' . substr($par,0,7)},
4758                                       $i+1) .
4759                               "&nbsp;</th>\n";
4760                 }
4761                 print "</tr></thead>\n<tbody>\n";
4762         }
4763
4764         my $alternate = 1;
4765         my $patchno = 0;
4766         foreach my $line (@{$difftree}) {
4767                 my $diff = parsed_difftree_line($line);
4768
4769                 if ($alternate) {
4770                         print "<tr class=\"dark\">\n";
4771                 } else {
4772                         print "<tr class=\"light\">\n";
4773                 }
4774                 $alternate ^= 1;
4775
4776                 if (exists $diff->{'nparents'}) { # combined diff
4777
4778                         fill_from_file_info($diff, @parents)
4779                                 unless exists $diff->{'from_file'};
4780
4781                         if (!is_deleted($diff)) {
4782                                 # file exists in the result (child) commit
4783                                 print "<td>" .
4784                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4785                                                              file_name=>$diff->{'to_file'},
4786                                                              hash_base=>$hash),
4787                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4788                                       "</td>\n";
4789                         } else {
4790                                 print "<td>" .
4791                                       esc_path($diff->{'to_file'}) .
4792                                       "</td>\n";
4793                         }
4794
4795                         if ($action eq 'commitdiff') {
4796                                 # link to patch
4797                                 $patchno++;
4798                                 print "<td class=\"link\">" .
4799                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4800                                               "patch") .
4801                                       " | " .
4802                                       "</td>\n";
4803                         }
4804
4805                         my $has_history = 0;
4806                         my $not_deleted = 0;
4807                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4808                                 my $hash_parent = $parents[$i];
4809                                 my $from_hash = $diff->{'from_id'}[$i];
4810                                 my $from_path = $diff->{'from_file'}[$i];
4811                                 my $status = $diff->{'status'}[$i];
4812
4813                                 $has_history ||= ($status ne 'A');
4814                                 $not_deleted ||= ($status ne 'D');
4815
4816                                 if ($status eq 'A') {
4817                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4818                                 } elsif ($status eq 'D') {
4819                                         print "<td class=\"link\">" .
4820                                               $cgi->a({-href => href(action=>"blob",
4821                                                                      hash_base=>$hash,
4822                                                                      hash=>$from_hash,
4823                                                                      file_name=>$from_path)},
4824                                                       "blob" . ($i+1)) .
4825                                               " | </td>\n";
4826                                 } else {
4827                                         if ($diff->{'to_id'} eq $from_hash) {
4828                                                 print "<td class=\"link nochange\">";
4829                                         } else {
4830                                                 print "<td class=\"link\">";
4831                                         }
4832                                         print $cgi->a({-href => href(action=>"blobdiff",
4833                                                                      hash=>$diff->{'to_id'},
4834                                                                      hash_parent=>$from_hash,
4835                                                                      hash_base=>$hash,
4836                                                                      hash_parent_base=>$hash_parent,
4837                                                                      file_name=>$diff->{'to_file'},
4838                                                                      file_parent=>$from_path)},
4839                                                       "diff" . ($i+1)) .
4840                                               " | </td>\n";
4841                                 }
4842                         }
4843
4844                         print "<td class=\"link\">";
4845                         if ($not_deleted) {
4846                                 print $cgi->a({-href => href(action=>"blob",
4847                                                              hash=>$diff->{'to_id'},
4848                                                              file_name=>$diff->{'to_file'},
4849                                                              hash_base=>$hash)},
4850                                               "blob");
4851                                 print " | " if ($has_history);
4852                         }
4853                         if ($has_history) {
4854                                 print $cgi->a({-href => href(action=>"history",
4855                                                              file_name=>$diff->{'to_file'},
4856                                                              hash_base=>$hash)},
4857                                               "history");
4858                         }
4859                         print "</td>\n";
4860
4861                         print "</tr>\n";
4862                         next; # instead of 'else' clause, to avoid extra indent
4863                 }
4864                 # else ordinary diff
4865
4866                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4867                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4868                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4869                         $to_mode_oct = oct $diff->{'to_mode'};
4870                         if (S_ISREG($to_mode_oct)) { # only for regular file
4871                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4872                         }
4873                         $to_file_type = file_type($diff->{'to_mode'});
4874                 }
4875                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4876                         $from_mode_oct = oct $diff->{'from_mode'};
4877                         if (S_ISREG($from_mode_oct)) { # only for regular file
4878                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4879                         }
4880                         $from_file_type = file_type($diff->{'from_mode'});
4881                 }
4882
4883                 if ($diff->{'status'} eq "A") { # created
4884                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4885                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4886                         $mode_chng   .= "]</span>";
4887                         print "<td>";
4888                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4889                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4890                                       -class => "list"}, esc_path($diff->{'file'}));
4891                         print "</td>\n";
4892                         print "<td>$mode_chng</td>\n";
4893                         print "<td class=\"link\">";
4894                         if ($action eq 'commitdiff') {
4895                                 # link to patch
4896                                 $patchno++;
4897                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4898                                               "patch") .
4899                                       " | ";
4900                         }
4901                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4902                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4903                                       "blob");
4904                         print "</td>\n";
4905
4906                 } elsif ($diff->{'status'} eq "D") { # deleted
4907                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4908                         print "<td>";
4909                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4910                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4911                                        -class => "list"}, esc_path($diff->{'file'}));
4912                         print "</td>\n";
4913                         print "<td>$mode_chng</td>\n";
4914                         print "<td class=\"link\">";
4915                         if ($action eq 'commitdiff') {
4916                                 # link to patch
4917                                 $patchno++;
4918                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4919                                               "patch") .
4920                                       " | ";
4921                         }
4922                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4923                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4924                                       "blob") . " | ";
4925                         if ($have_blame) {
4926                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4927                                                              file_name=>$diff->{'file'})},
4928                                               "blame") . " | ";
4929                         }
4930                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4931                                                      file_name=>$diff->{'file'})},
4932                                       "history");
4933                         print "</td>\n";
4934
4935                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4936                         my $mode_chnge = "";
4937                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4938                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4939                                 if ($from_file_type ne $to_file_type) {
4940                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4941                                 }
4942                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4943                                         if ($from_mode_str && $to_mode_str) {
4944                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4945                                         } elsif ($to_mode_str) {
4946                                                 $mode_chnge .= " mode: $to_mode_str";
4947                                         }
4948                                 }
4949                                 $mode_chnge .= "]</span>\n";
4950                         }
4951                         print "<td>";
4952                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4953                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4954                                       -class => "list"}, esc_path($diff->{'file'}));
4955                         print "</td>\n";
4956                         print "<td>$mode_chnge</td>\n";
4957                         print "<td class=\"link\">";
4958                         if ($action eq 'commitdiff') {
4959                                 # link to patch
4960                                 $patchno++;
4961                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4962                                               "patch") .
4963                                       " | ";
4964                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4965                                 # "commit" view and modified file (not onlu mode changed)
4966                                 print $cgi->a({-href => href(action=>"blobdiff",
4967                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4968                                                              hash_base=>$hash, hash_parent_base=>$parent,
4969                                                              file_name=>$diff->{'file'})},
4970                                               "diff") .
4971                                       " | ";
4972                         }
4973                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4974                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4975                                        "blob") . " | ";
4976                         if ($have_blame) {
4977                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4978                                                              file_name=>$diff->{'file'})},
4979                                               "blame") . " | ";
4980                         }
4981                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4982                                                      file_name=>$diff->{'file'})},
4983                                       "history");
4984                         print "</td>\n";
4985
4986                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4987                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4988                         my $nstatus = $status_name{$diff->{'status'}};
4989                         my $mode_chng = "";
4990                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4991                                 # mode also for directories, so we cannot use $to_mode_str
4992                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4993                         }
4994                         print "<td>" .
4995                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4996                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4997                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4998                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4999                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5000                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5001                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5002                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5003                               "<td class=\"link\">";
5004                         if ($action eq 'commitdiff') {
5005                                 # link to patch
5006                                 $patchno++;
5007                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5008                                               "patch") .
5009                                       " | ";
5010                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5011                                 # "commit" view and modified file (not only pure rename or copy)
5012                                 print $cgi->a({-href => href(action=>"blobdiff",
5013                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5014                                                              hash_base=>$hash, hash_parent_base=>$parent,
5015                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5016                                               "diff") .
5017                                       " | ";
5018                         }
5019                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5020                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5021                                       "blob") . " | ";
5022                         if ($have_blame) {
5023                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5024                                                              file_name=>$diff->{'to_file'})},
5025                                               "blame") . " | ";
5026                         }
5027                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5028                                                     file_name=>$diff->{'to_file'})},
5029                                       "history");
5030                         print "</td>\n";
5031
5032                 } # we should not encounter Unmerged (U) or Unknown (X) status
5033                 print "</tr>\n";
5034         }
5035         print "</tbody>" if $has_header;
5036         print "</table>\n";
5037 }
5038
5039 # Print context lines and then rem/add lines in a side-by-side manner.
5040 sub print_sidebyside_diff_lines {
5041         my ($ctx, $rem, $add) = @_;
5042
5043         # print context block before add/rem block
5044         if (@$ctx) {
5045                 print join '',
5046                         '<div class="chunk_block ctx">',
5047                                 '<div class="old">',
5048                                 @$ctx,
5049                                 '</div>',
5050                                 '<div class="new">',
5051                                 @$ctx,
5052                                 '</div>',
5053                         '</div>';
5054         }
5055
5056         if (!@$add) {
5057                 # pure removal
5058                 print join '',
5059                         '<div class="chunk_block rem">',
5060                                 '<div class="old">',
5061                                 @$rem,
5062                                 '</div>',
5063                         '</div>';
5064         } elsif (!@$rem) {
5065                 # pure addition
5066                 print join '',
5067                         '<div class="chunk_block add">',
5068                                 '<div class="new">',
5069                                 @$add,
5070                                 '</div>',
5071                         '</div>';
5072         } else {
5073                 print join '',
5074                         '<div class="chunk_block chg">',
5075                                 '<div class="old">',
5076                                 @$rem,
5077                                 '</div>',
5078                                 '<div class="new">',
5079                                 @$add,
5080                                 '</div>',
5081                         '</div>';
5082         }
5083 }
5084
5085 # Print context lines and then rem/add lines in inline manner.
5086 sub print_inline_diff_lines {
5087         my ($ctx, $rem, $add) = @_;
5088
5089         print @$ctx, @$rem, @$add;
5090 }
5091
5092 # Format removed and added line, mark changed part and HTML-format them.
5093 # Implementation is based on contrib/diff-highlight
5094 sub format_rem_add_lines_pair {
5095         my ($rem, $add, $num_parents) = @_;
5096
5097         # We need to untabify lines before split()'ing them;
5098         # otherwise offsets would be invalid.
5099         chomp $rem;
5100         chomp $add;
5101         $rem = untabify($rem);
5102         $add = untabify($add);
5103
5104         my @rem = split(//, $rem);
5105         my @add = split(//, $add);
5106         my ($esc_rem, $esc_add);
5107         # Ignore leading +/- characters for each parent.
5108         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5109         my ($prefix_has_nonspace, $suffix_has_nonspace);
5110
5111         my $shorter = (@rem < @add) ? @rem : @add;
5112         while ($prefix_len < $shorter) {
5113                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5114
5115                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5116                 $prefix_len++;
5117         }
5118
5119         while ($prefix_len + $suffix_len < $shorter) {
5120                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5121
5122                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5123                 $suffix_len++;
5124         }
5125
5126         # Mark lines that are different from each other, but have some common
5127         # part that isn't whitespace.  If lines are completely different, don't
5128         # mark them because that would make output unreadable, especially if
5129         # diff consists of multiple lines.
5130         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5131                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5132                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5133                 $esc_add = esc_html_hl_regions($add, 'marked',
5134                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5135         } else {
5136                 $esc_rem = esc_html($rem, -nbsp=>1);
5137                 $esc_add = esc_html($add, -nbsp=>1);
5138         }
5139
5140         return format_diff_line(\$esc_rem, 'rem'),
5141                format_diff_line(\$esc_add, 'add');
5142 }
5143
5144 # HTML-format diff context, removed and added lines.
5145 sub format_ctx_rem_add_lines {
5146         my ($ctx, $rem, $add, $num_parents) = @_;
5147         my (@new_ctx, @new_rem, @new_add);
5148         my $can_highlight = 0;
5149         my $is_combined = ($num_parents > 1);
5150
5151         # Highlight if every removed line has a corresponding added line.
5152         if (@$add > 0 && @$add == @$rem) {
5153                 $can_highlight = 1;
5154
5155                 # Highlight lines in combined diff only if the chunk contains
5156                 # diff between the same version, e.g.
5157                 #
5158                 #    - a
5159                 #   -  b
5160                 #    + c
5161                 #   +  d
5162                 #
5163                 # Otherwise the highlightling would be confusing.
5164                 if ($is_combined) {
5165                         for (my $i = 0; $i < @$add; $i++) {
5166                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5167                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5168
5169                                 $prefix_rem =~ s/-/+/g;
5170
5171                                 if ($prefix_rem ne $prefix_add) {
5172                                         $can_highlight = 0;
5173                                         last;
5174                                 }
5175                         }
5176                 }
5177         }
5178
5179         if ($can_highlight) {
5180                 for (my $i = 0; $i < @$add; $i++) {
5181                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5182                                 $rem->[$i], $add->[$i], $num_parents);
5183                         push @new_rem, $line_rem;
5184                         push @new_add, $line_add;
5185                 }
5186         } else {
5187                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5188                 @new_add = map { format_diff_line($_, 'add') } @$add;
5189         }
5190
5191         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5192
5193         return (\@new_ctx, \@new_rem, \@new_add);
5194 }
5195
5196 # Print context lines and then rem/add lines.
5197 sub print_diff_lines {
5198         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5199         my $is_combined = $num_parents > 1;
5200
5201         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5202                 $num_parents);
5203
5204         if ($diff_style eq 'sidebyside' && !$is_combined) {
5205                 print_sidebyside_diff_lines($ctx, $rem, $add);
5206         } else {
5207                 # default 'inline' style and unknown styles
5208                 print_inline_diff_lines($ctx, $rem, $add);
5209         }
5210 }
5211
5212 sub print_diff_chunk {
5213         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5214         my (@ctx, @rem, @add);
5215
5216         # The class of the previous line.
5217         my $prev_class = '';
5218
5219         return unless @chunk;
5220
5221         # incomplete last line might be among removed or added lines,
5222         # or both, or among context lines: find which
5223         for (my $i = 1; $i < @chunk; $i++) {
5224                 if ($chunk[$i][0] eq 'incomplete') {
5225                         $chunk[$i][0] = $chunk[$i-1][0];
5226                 }
5227         }
5228
5229         # guardian
5230         push @chunk, ["", ""];
5231
5232         foreach my $line_info (@chunk) {
5233                 my ($class, $line) = @$line_info;
5234
5235                 # print chunk headers
5236                 if ($class && $class eq 'chunk_header') {
5237                         print format_diff_line($line, $class, $from, $to);
5238                         next;
5239                 }
5240
5241                 ## print from accumulator when have some add/rem lines or end
5242                 # of chunk (flush context lines), or when have add and rem
5243                 # lines and new block is reached (otherwise add/rem lines could
5244                 # be reordered)
5245                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5246                     (@rem && @add && $class ne $prev_class)) {
5247                         print_diff_lines(\@ctx, \@rem, \@add,
5248                                          $diff_style, $num_parents);
5249                         @ctx = @rem = @add = ();
5250                 }
5251
5252                 ## adding lines to accumulator
5253                 # guardian value
5254                 last unless $line;
5255                 # rem, add or change
5256                 if ($class eq 'rem') {
5257                         push @rem, $line;
5258                 } elsif ($class eq 'add') {
5259                         push @add, $line;
5260                 }
5261                 # context line
5262                 if ($class eq 'ctx') {
5263                         push @ctx, $line;
5264                 }
5265
5266                 $prev_class = $class;
5267         }
5268 }
5269
5270 sub git_patchset_body {
5271         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5272         my ($hash_parent) = $hash_parents[0];
5273
5274         my $is_combined = (@hash_parents > 1);
5275         my $patch_idx = 0;
5276         my $patch_number = 0;
5277         my $patch_line;
5278         my $diffinfo;
5279         my $to_name;
5280         my (%from, %to);
5281         my @chunk; # for side-by-side diff
5282
5283         print "<div class=\"patchset\">\n";
5284
5285         # skip to first patch
5286         while ($patch_line = <$fd>) {
5287                 chomp $patch_line;
5288
5289                 last if ($patch_line =~ m/^diff /);
5290         }
5291
5292  PATCH:
5293         while ($patch_line) {
5294
5295                 # parse "git diff" header line
5296                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5297                         # $1 is from_name, which we do not use
5298                         $to_name = unquote($2);
5299                         $to_name =~ s!^b/!!;
5300                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5301                         # $1 is 'cc' or 'combined', which we do not use
5302                         $to_name = unquote($2);
5303                 } else {
5304                         $to_name = undef;
5305                 }
5306
5307                 # check if current patch belong to current raw line
5308                 # and parse raw git-diff line if needed
5309                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5310                         # this is continuation of a split patch
5311                         print "<div class=\"patch cont\">\n";
5312                 } else {
5313                         # advance raw git-diff output if needed
5314                         $patch_idx++ if defined $diffinfo;
5315
5316                         # read and prepare patch information
5317                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5318
5319                         # compact combined diff output can have some patches skipped
5320                         # find which patch (using pathname of result) we are at now;
5321                         if ($is_combined) {
5322                                 while ($to_name ne $diffinfo->{'to_file'}) {
5323                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5324                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5325                                               "</div>\n";  # class="patch"
5326
5327                                         $patch_idx++;
5328                                         $patch_number++;
5329
5330                                         last if $patch_idx > $#$difftree;
5331                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5332                                 }
5333                         }
5334
5335                         # modifies %from, %to hashes
5336                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5337
5338                         # this is first patch for raw difftree line with $patch_idx index
5339                         # we index @$difftree array from 0, but number patches from 1
5340                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5341                 }
5342
5343                 # git diff header
5344                 #assert($patch_line =~ m/^diff /) if DEBUG;
5345                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5346                 $patch_number++;
5347                 # print "git diff" header
5348                 print format_git_diff_header_line($patch_line, $diffinfo,
5349                                                   \%from, \%to);
5350
5351                 # print extended diff header
5352                 print "<div class=\"diff extended_header\">\n";
5353         EXTENDED_HEADER:
5354                 while ($patch_line = <$fd>) {
5355                         chomp $patch_line;
5356
5357                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5358
5359                         print format_extended_diff_header_line($patch_line, $diffinfo,
5360                                                                \%from, \%to);
5361                 }
5362                 print "</div>\n"; # class="diff extended_header"
5363
5364                 # from-file/to-file diff header
5365                 if (! $patch_line) {
5366                         print "</div>\n"; # class="patch"
5367                         last PATCH;
5368                 }
5369                 next PATCH if ($patch_line =~ m/^diff /);
5370                 #assert($patch_line =~ m/^---/) if DEBUG;
5371
5372                 my $last_patch_line = $patch_line;
5373                 $patch_line = <$fd>;
5374                 chomp $patch_line;
5375                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5376
5377                 print format_diff_from_to_header($last_patch_line, $patch_line,
5378                                                  $diffinfo, \%from, \%to,
5379                                                  @hash_parents);
5380
5381                 # the patch itself
5382         LINE:
5383                 while ($patch_line = <$fd>) {
5384                         chomp $patch_line;
5385
5386                         next PATCH if ($patch_line =~ m/^diff /);
5387
5388                         my $class = diff_line_class($patch_line, \%from, \%to);
5389
5390                         if ($class eq 'chunk_header') {
5391                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5392                                 @chunk = ();
5393                         }
5394
5395                         push @chunk, [ $class, $patch_line ];
5396                 }
5397
5398         } continue {
5399                 if (@chunk) {
5400                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5401                         @chunk = ();
5402                 }
5403                 print "</div>\n"; # class="patch"
5404         }
5405
5406         # for compact combined (--cc) format, with chunk and patch simplification
5407         # the patchset might be empty, but there might be unprocessed raw lines
5408         for (++$patch_idx if $patch_number > 0;
5409              $patch_idx < @$difftree;
5410              ++$patch_idx) {
5411                 # read and prepare patch information
5412                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5413
5414                 # generate anchor for "patch" links in difftree / whatchanged part
5415                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5416                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5417                       "</div>\n";  # class="patch"
5418
5419                 $patch_number++;
5420         }
5421
5422         if ($patch_number == 0) {
5423                 if (@hash_parents > 1) {
5424                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5425                 } else {
5426                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5427                 }
5428         }
5429
5430         print "</div>\n"; # class="patchset"
5431 }
5432
5433 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5434
5435 sub git_project_search_form {
5436         my ($searchtext, $search_use_regexp) = @_;
5437
5438         my $limit = '';
5439         if ($project_filter) {
5440                 $limit = " in '$project_filter/'";
5441         }
5442
5443         print "<div class=\"projsearch\">\n";
5444         print $cgi->startform(-method => 'get', -action => $my_uri) .
5445               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5446         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5447                 if (defined $project_filter);
5448         print $cgi->textfield(-name => 's', -value => $searchtext,
5449                               -title => "Search project by name and description$limit",
5450                               -size => 60) . "\n" .
5451               "<span title=\"Extended regular expression\">" .
5452               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5453                              -checked => $search_use_regexp) .
5454               "</span>\n" .
5455               $cgi->submit(-name => 'btnS', -value => 'Search') .
5456               $cgi->end_form() . "\n" .
5457               $cgi->a({-href => href(project => undef, searchtext => undef,
5458                                      project_filter => $project_filter)},
5459                       esc_html("List all projects$limit")) . "<br />\n";
5460         print "</div>\n";
5461 }
5462
5463 # entry for given @keys needs filling if at least one of keys in list
5464 # is not present in %$project_info
5465 sub project_info_needs_filling {
5466         my ($project_info, @keys) = @_;
5467
5468         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5469         foreach my $key (@keys) {
5470                 if (!exists $project_info->{$key}) {
5471                         return 1;
5472                 }
5473         }
5474         return;
5475 }
5476
5477 # fills project list info (age, description, owner, category, forks, etc.)
5478 # for each project in the list, removing invalid projects from
5479 # returned list, or fill only specified info.
5480 #
5481 # Invalid projects are removed from the returned list if and only if you
5482 # ask 'age' or 'age_string' to be filled, because they are the only fields
5483 # that run unconditionally git command that requires repository, and
5484 # therefore do always check if project repository is invalid.
5485 #
5486 # USAGE:
5487 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5488 #   ensures that 'descr_long' and 'ctags' fields are filled
5489 # * @project_list = fill_project_list_info(\@project_list)
5490 #   ensures that all fields are filled (and invalid projects removed)
5491 #
5492 # NOTE: modifies $projlist, but does not remove entries from it
5493 sub fill_project_list_info {
5494         my ($projlist, @wanted_keys) = @_;
5495         my @projects;
5496         my $filter_set = sub { return @_; };
5497         if (@wanted_keys) {
5498                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5499                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5500         }
5501
5502         my $show_ctags = gitweb_check_feature('ctags');
5503  PROJECT:
5504         foreach my $pr (@$projlist) {
5505                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5506                         my (@activity) = git_get_last_activity($pr->{'path'});
5507                         unless (@activity) {
5508                                 next PROJECT;
5509                         }
5510                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5511                 }
5512                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5513                         my $descr = git_get_project_description($pr->{'path'}) || "";
5514                         $descr = to_utf8($descr);
5515                         $pr->{'descr_long'} = $descr;
5516                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5517                 }
5518                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5519                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5520                 }
5521                 if ($show_ctags &&
5522                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5523                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5524                 }
5525                 if ($projects_list_group_categories &&
5526                     project_info_needs_filling($pr, $filter_set->('category'))) {
5527                         my $cat = git_get_project_category($pr->{'path'}) ||
5528                                                            $project_list_default_category;
5529                         $pr->{'category'} = to_utf8($cat);
5530                 }
5531
5532                 push @projects, $pr;
5533         }
5534
5535         return @projects;
5536 }
5537
5538 sub sort_projects_list {
5539         my ($projlist, $order) = @_;
5540         my @projects;
5541
5542         my %order_info = (
5543                 project => { key => 'path', type => 'str' },
5544                 descr => { key => 'descr_long', type => 'str' },
5545                 owner => { key => 'owner', type => 'str' },
5546                 age => { key => 'age', type => 'num' }
5547         );
5548         my $oi = $order_info{$order};
5549         return @$projlist unless defined $oi;
5550         if ($oi->{'type'} eq 'str') {
5551                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5552         } else {
5553                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5554         }
5555
5556         return @projects;
5557 }
5558
5559 # returns a hash of categories, containing the list of project
5560 # belonging to each category
5561 sub build_projlist_by_category {
5562         my ($projlist, $from, $to) = @_;
5563         my %categories;
5564
5565         $from = 0 unless defined $from;
5566         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5567
5568         for (my $i = $from; $i <= $to; $i++) {
5569                 my $pr = $projlist->[$i];
5570                 push @{$categories{ $pr->{'category'} }}, $pr;
5571         }
5572
5573         return wantarray ? %categories : \%categories;
5574 }
5575
5576 # print 'sort by' <th> element, generating 'sort by $name' replay link
5577 # if that order is not selected
5578 sub print_sort_th {
5579         print format_sort_th(@_);
5580 }
5581
5582 sub format_sort_th {
5583         my ($name, $order, $header) = @_;
5584         my $sort_th = "";
5585         $header ||= ucfirst($name);
5586
5587         if ($order eq $name) {
5588                 $sort_th .= "<th>$header</th>\n";
5589         } else {
5590                 $sort_th .= "<th>" .
5591                             $cgi->a({-href => href(-replay=>1, order=>$name),
5592                                      -class => "header"}, $header) .
5593                             "</th>\n";
5594         }
5595
5596         return $sort_th;
5597 }
5598
5599 sub git_project_list_rows {
5600         my ($projlist, $from, $to, $check_forks) = @_;
5601
5602         $from = 0 unless defined $from;
5603         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5604
5605         my $alternate = 1;
5606         for (my $i = $from; $i <= $to; $i++) {
5607                 my $pr = $projlist->[$i];
5608
5609                 if ($alternate) {
5610                         print "<tr class=\"dark\">\n";
5611                 } else {
5612                         print "<tr class=\"light\">\n";
5613                 }
5614                 $alternate ^= 1;
5615
5616                 if ($check_forks) {
5617                         print "<td>";
5618                         if ($pr->{'forks'}) {
5619                                 my $nforks = scalar @{$pr->{'forks'}};
5620                                 if ($nforks > 0) {
5621                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5622                                                        -title => "$nforks forks"}, "+");
5623                                 } else {
5624                                         print $cgi->span({-title => "$nforks forks"}, "+");
5625                                 }
5626                         }
5627                         print "</td>\n";
5628                 }
5629                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5630                                         -class => "list"},
5631                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5632                       "</td>\n" .
5633                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5634                                         -class => "list",
5635                                         -title => $pr->{'descr_long'}},
5636                                         $search_regexp
5637                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5638                                                                     $pr->{'descr'}, $search_regexp)
5639                                         : esc_html($pr->{'descr'})) .
5640                       "</td>\n";
5641                 unless ($omit_owner) {
5642                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5643                 }
5644                 unless ($omit_age_column) {
5645                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5646                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5647                 }
5648                 print"<td class=\"link\">" .
5649                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5650                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5651                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5652                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5653                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5654                       "</td>\n" .
5655                       "</tr>\n";
5656         }
5657 }
5658
5659 sub git_project_list_body {
5660         # actually uses global variable $project
5661         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5662         my @projects = @$projlist;
5663
5664         my $check_forks = gitweb_check_feature('forks');
5665         my $show_ctags  = gitweb_check_feature('ctags');
5666         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5667         $check_forks = undef
5668                 if ($tagfilter || $search_regexp);
5669
5670         # filtering out forks before filling info allows to do less work
5671         @projects = filter_forks_from_projects_list(\@projects)
5672                 if ($check_forks);
5673         # search_projects_list pre-fills required info
5674         @projects = search_projects_list(\@projects,
5675                                          'search_regexp' => $search_regexp,
5676                                          'tagfilter'  => $tagfilter)
5677                 if ($tagfilter || $search_regexp);
5678         # fill the rest
5679         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5680         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5681         push @all_fields, 'owner' unless($omit_owner);
5682         @projects = fill_project_list_info(\@projects, @all_fields);
5683
5684         $order ||= $default_projects_order;
5685         $from = 0 unless defined $from;
5686         $to = $#projects if (!defined $to || $#projects < $to);
5687
5688         # short circuit
5689         if ($from > $to) {
5690                 print "<center>\n".
5691                       "<b>No such projects found</b><br />\n".
5692                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5693                       "</center>\n<br />\n";
5694                 return;
5695         }
5696
5697         @projects = sort_projects_list(\@projects, $order);
5698
5699         if ($show_ctags) {
5700                 my $ctags = git_gather_all_ctags(\@projects);
5701                 my $cloud = git_populate_project_tagcloud($ctags);
5702                 print git_show_project_tagcloud($cloud, 64);
5703         }
5704
5705         print "<table class=\"project_list\">\n";
5706         unless ($no_header) {
5707                 print "<tr>\n";
5708                 if ($check_forks) {
5709                         print "<th></th>\n";
5710                 }
5711                 print_sort_th('project', $order, 'Project');
5712                 print_sort_th('descr', $order, 'Description');
5713                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5714                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5715                 print "<th></th>\n" . # for links
5716                       "</tr>\n";
5717         }
5718
5719         if ($projects_list_group_categories) {
5720                 # only display categories with projects in the $from-$to window
5721                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5722                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5723                 foreach my $cat (sort keys %categories) {
5724                         unless ($cat eq "") {
5725                                 print "<tr>\n";
5726                                 if ($check_forks) {
5727                                         print "<td></td>\n";
5728                                 }
5729                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5730                                 print "</tr>\n";
5731                         }
5732
5733                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5734                 }
5735         } else {
5736                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5737         }
5738
5739         if (defined $extra) {
5740                 print "<tr>\n";
5741                 if ($check_forks) {
5742                         print "<td></td>\n";
5743                 }
5744                 print "<td colspan=\"5\">$extra</td>\n" .
5745                       "</tr>\n";
5746         }
5747         print "</table>\n";
5748 }
5749
5750 sub git_log_body {
5751         # uses global variable $project
5752         my ($commitlist, $from, $to, $refs, $extra) = @_;
5753
5754         $from = 0 unless defined $from;
5755         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5756
5757         for (my $i = 0; $i <= $to; $i++) {
5758                 my %co = %{$commitlist->[$i]};
5759                 next if !%co;
5760                 my $commit = $co{'id'};
5761                 my $ref = format_ref_marker($refs, $commit);
5762                 git_print_header_div('commit',
5763                                "<span class=\"age\">$co{'age_string'}</span>" .
5764                                esc_html($co{'title'}) . $ref,
5765                                $commit);
5766                 print "<div class=\"title_text\">\n" .
5767                       "<div class=\"log_link\">\n" .
5768                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5769                       " | " .
5770                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5771                       " | " .
5772                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5773                       "<br/>\n" .
5774                       "</div>\n";
5775                       git_print_authorship(\%co, -tag => 'span');
5776                       print "<br/>\n</div>\n";
5777
5778                 print "<div class=\"log_body\">\n";
5779                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5780                 print "</div>\n";
5781         }
5782         if ($extra) {
5783                 print "<div class=\"page_nav\">\n";
5784                 print "$extra\n";
5785                 print "</div>\n";
5786         }
5787 }
5788
5789 sub git_shortlog_body {
5790         # uses global variable $project
5791         my ($commitlist, $from, $to, $refs, $extra) = @_;
5792
5793         $from = 0 unless defined $from;
5794         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5795
5796         print "<table class=\"shortlog\">\n";
5797         my $alternate = 1;
5798         for (my $i = $from; $i <= $to; $i++) {
5799                 my %co = %{$commitlist->[$i]};
5800                 my $commit = $co{'id'};
5801                 my $ref = format_ref_marker($refs, $commit);
5802                 if ($alternate) {
5803                         print "<tr class=\"dark\">\n";
5804                 } else {
5805                         print "<tr class=\"light\">\n";
5806                 }
5807                 $alternate ^= 1;
5808                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5809                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5810                       format_author_html('td', \%co, 10) . "<td>";
5811                 print format_subject_html($co{'title'}, $co{'title_short'},
5812                                           href(action=>"commit", hash=>$commit), $ref);
5813                 print "</td>\n" .
5814                       "<td class=\"link\">" .
5815                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5816                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5817                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5818                 my $snapshot_links = format_snapshot_links($commit);
5819                 if (defined $snapshot_links) {
5820                         print " | " . $snapshot_links;
5821                 }
5822                 print "</td>\n" .
5823                       "</tr>\n";
5824         }
5825         if (defined $extra) {
5826                 print "<tr>\n" .
5827                       "<td colspan=\"4\">$extra</td>\n" .
5828                       "</tr>\n";
5829         }
5830         print "</table>\n";
5831 }
5832
5833 sub git_history_body {
5834         # Warning: assumes constant type (blob or tree) during history
5835         my ($commitlist, $from, $to, $refs, $extra,
5836             $file_name, $file_hash, $ftype) = @_;
5837
5838         $from = 0 unless defined $from;
5839         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5840
5841         print "<table class=\"history\">\n";
5842         my $alternate = 1;
5843         for (my $i = $from; $i <= $to; $i++) {
5844                 my %co = %{$commitlist->[$i]};
5845                 if (!%co) {
5846                         next;
5847                 }
5848                 my $commit = $co{'id'};
5849
5850                 my $ref = format_ref_marker($refs, $commit);
5851
5852                 if ($alternate) {
5853                         print "<tr class=\"dark\">\n";
5854                 } else {
5855                         print "<tr class=\"light\">\n";
5856                 }
5857                 $alternate ^= 1;
5858                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5859         # shortlog:   format_author_html('td', \%co, 10)
5860                       format_author_html('td', \%co, 15, 3) . "<td>";
5861                 # originally git_history used chop_str($co{'title'}, 50)
5862                 print format_subject_html($co{'title'}, $co{'title_short'},
5863                                           href(action=>"commit", hash=>$commit), $ref);
5864                 print "</td>\n" .
5865                       "<td class=\"link\">" .
5866                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5867                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5868
5869                 if ($ftype eq 'blob') {
5870                         my $blob_current = $file_hash;
5871                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5872                         if (defined $blob_current && defined $blob_parent &&
5873                                         $blob_current ne $blob_parent) {
5874                                 print " | " .
5875                                         $cgi->a({-href => href(action=>"blobdiff",
5876                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5877                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5878                                                                file_name=>$file_name)},
5879                                                 "diff to current");
5880                         }
5881                 }
5882                 print "</td>\n" .
5883                       "</tr>\n";
5884         }
5885         if (defined $extra) {
5886                 print "<tr>\n" .
5887                       "<td colspan=\"4\">$extra</td>\n" .
5888                       "</tr>\n";
5889         }
5890         print "</table>\n";
5891 }
5892
5893 sub git_tags_body {
5894         # uses global variable $project
5895         my ($taglist, $from, $to, $extra) = @_;
5896         $from = 0 unless defined $from;
5897         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5898
5899         print "<table class=\"tags\">\n";
5900         my $alternate = 1;
5901         for (my $i = $from; $i <= $to; $i++) {
5902                 my $entry = $taglist->[$i];
5903                 my %tag = %$entry;
5904                 my $comment = $tag{'subject'};
5905                 my $comment_short;
5906                 if (defined $comment) {
5907                         $comment_short = chop_str($comment, 30, 5);
5908                 }
5909                 if ($alternate) {
5910                         print "<tr class=\"dark\">\n";
5911                 } else {
5912                         print "<tr class=\"light\">\n";
5913                 }
5914                 $alternate ^= 1;
5915                 if (defined $tag{'age'}) {
5916                         print "<td><i>$tag{'age'}</i></td>\n";
5917                 } else {
5918                         print "<td></td>\n";
5919                 }
5920                 print "<td>" .
5921                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5922                                -class => "list name"}, esc_html($tag{'name'})) .
5923                       "</td>\n" .
5924                       "<td>";
5925                 if (defined $comment) {
5926                         print format_subject_html($comment, $comment_short,
5927                                                   href(action=>"tag", hash=>$tag{'id'}));
5928                 }
5929                 print "</td>\n" .
5930                       "<td class=\"selflink\">";
5931                 if ($tag{'type'} eq "tag") {
5932                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5933                 } else {
5934                         print "&nbsp;";
5935                 }
5936                 print "</td>\n" .
5937                       "<td class=\"link\">" . " | " .
5938                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5939                 if ($tag{'reftype'} eq "commit") {
5940                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5941                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5942                 } elsif ($tag{'reftype'} eq "blob") {
5943                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5944                 }
5945                 print "</td>\n" .
5946                       "</tr>";
5947         }
5948         if (defined $extra) {
5949                 print "<tr>\n" .
5950                       "<td colspan=\"5\">$extra</td>\n" .
5951                       "</tr>\n";
5952         }
5953         print "</table>\n";
5954 }
5955
5956 sub git_heads_body {
5957         # uses global variable $project
5958         my ($headlist, $head_at, $from, $to, $extra) = @_;
5959         $from = 0 unless defined $from;
5960         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5961
5962         print "<table class=\"heads\">\n";
5963         my $alternate = 1;
5964         for (my $i = $from; $i <= $to; $i++) {
5965                 my $entry = $headlist->[$i];
5966                 my %ref = %$entry;
5967                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5968                 if ($alternate) {
5969                         print "<tr class=\"dark\">\n";
5970                 } else {
5971                         print "<tr class=\"light\">\n";
5972                 }
5973                 $alternate ^= 1;
5974                 print "<td><i>$ref{'age'}</i></td>\n" .
5975                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5976                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5977                                -class => "list name"},esc_html($ref{'name'})) .
5978                       "</td>\n" .
5979                       "<td class=\"link\">" .
5980                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5981                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5982                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5983                       "</td>\n" .
5984                       "</tr>";
5985         }
5986         if (defined $extra) {
5987                 print "<tr>\n" .
5988                       "<td colspan=\"3\">$extra</td>\n" .
5989                       "</tr>\n";
5990         }
5991         print "</table>\n";
5992 }
5993
5994 # Display a single remote block
5995 sub git_remote_block {
5996         my ($remote, $rdata, $limit, $head) = @_;
5997
5998         my $heads = $rdata->{'heads'};
5999         my $fetch = $rdata->{'fetch'};
6000         my $push = $rdata->{'push'};
6001
6002         my $urls_table = "<table class=\"projects_list\">\n" ;
6003
6004         if (defined $fetch) {
6005                 if ($fetch eq $push) {
6006                         $urls_table .= format_repo_url("URL", $fetch);
6007                 } else {
6008                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6009                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6010                 }
6011         } elsif (defined $push) {
6012                 $urls_table .= format_repo_url("Push URL", $push);
6013         } else {
6014                 $urls_table .= format_repo_url("", "No remote URL");
6015         }
6016
6017         $urls_table .= "</table>\n";
6018
6019         my $dots;
6020         if (defined $limit && $limit < @$heads) {
6021                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6022         }
6023
6024         print $urls_table;
6025         git_heads_body($heads, $head, 0, $limit, $dots);
6026 }
6027
6028 # Display a list of remote names with the respective fetch and push URLs
6029 sub git_remotes_list {
6030         my ($remotedata, $limit) = @_;
6031         print "<table class=\"heads\">\n";
6032         my $alternate = 1;
6033         my @remotes = sort keys %$remotedata;
6034
6035         my $limited = $limit && $limit < @remotes;
6036
6037         $#remotes = $limit - 1 if $limited;
6038
6039         while (my $remote = shift @remotes) {
6040                 my $rdata = $remotedata->{$remote};
6041                 my $fetch = $rdata->{'fetch'};
6042                 my $push = $rdata->{'push'};
6043                 if ($alternate) {
6044                         print "<tr class=\"dark\">\n";
6045                 } else {
6046                         print "<tr class=\"light\">\n";
6047                 }
6048                 $alternate ^= 1;
6049                 print "<td>" .
6050                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6051                                -class=> "list name"},esc_html($remote)) .
6052                       "</td>";
6053                 print "<td class=\"link\">" .
6054                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6055                       " | " .
6056                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6057                       "</td>";
6058
6059                 print "</tr>\n";
6060         }
6061
6062         if ($limited) {
6063                 print "<tr>\n" .
6064                       "<td colspan=\"3\">" .
6065                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6066                       "</td>\n" . "</tr>\n";
6067         }
6068
6069         print "</table>";
6070 }
6071
6072 # Display remote heads grouped by remote, unless there are too many
6073 # remotes, in which case we only display the remote names
6074 sub git_remotes_body {
6075         my ($remotedata, $limit, $head) = @_;
6076         if ($limit and $limit < keys %$remotedata) {
6077                 git_remotes_list($remotedata, $limit);
6078         } else {
6079                 fill_remote_heads($remotedata);
6080                 while (my ($remote, $rdata) = each %$remotedata) {
6081                         git_print_section({-class=>"remote", -id=>$remote},
6082                                 ["remotes", $remote, $remote], sub {
6083                                         git_remote_block($remote, $rdata, $limit, $head);
6084                                 });
6085                 }
6086         }
6087 }
6088
6089 sub git_search_message {
6090         my %co = @_;
6091
6092         my $greptype;
6093         if ($searchtype eq 'commit') {
6094                 $greptype = "--grep=";
6095         } elsif ($searchtype eq 'author') {
6096                 $greptype = "--author=";
6097         } elsif ($searchtype eq 'committer') {
6098                 $greptype = "--committer=";
6099         }
6100         $greptype .= $searchtext;
6101         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6102                                        $greptype, '--regexp-ignore-case',
6103                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6104
6105         my $paging_nav = '';
6106         if ($page > 0) {
6107                 $paging_nav .=
6108                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6109                                 "first") .
6110                         " &sdot; " .
6111                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6112                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6113         } else {
6114                 $paging_nav .= "first &sdot; prev";
6115         }
6116         my $next_link = '';
6117         if ($#commitlist >= 100) {
6118                 $next_link =
6119                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6120                                  -accesskey => "n", -title => "Alt-n"}, "next");
6121                 $paging_nav .= " &sdot; $next_link";
6122         } else {
6123                 $paging_nav .= " &sdot; next";
6124         }
6125
6126         git_header_html();
6127
6128         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6129         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6130         if ($page == 0 && !@commitlist) {
6131                 print "<p>No match.</p>\n";
6132         } else {
6133                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6134         }
6135
6136         git_footer_html();
6137 }
6138
6139 sub git_search_changes {
6140         my %co = @_;
6141
6142         local $/ = "\n";
6143         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6144                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6145                 ($search_use_regexp ? '--pickaxe-regex' : ())
6146                         or die_error(500, "Open git-log failed");
6147
6148         git_header_html();
6149
6150         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6151         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6152
6153         print "<table class=\"pickaxe search\">\n";
6154         my $alternate = 1;
6155         undef %co;
6156         my @files;
6157         while (my $line = <$fd>) {
6158                 chomp $line;
6159                 next unless $line;
6160
6161                 my %set = parse_difftree_raw_line($line);
6162                 if (defined $set{'commit'}) {
6163                         # finish previous commit
6164                         if (%co) {
6165                                 print "</td>\n" .
6166                                       "<td class=\"link\">" .
6167                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6168                                               "commit") .
6169                                       " | " .
6170                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6171                                                              hash_base=>$co{'id'})},
6172                                               "tree") .
6173                                       "</td>\n" .
6174                                       "</tr>\n";
6175                         }
6176
6177                         if ($alternate) {
6178                                 print "<tr class=\"dark\">\n";
6179                         } else {
6180                                 print "<tr class=\"light\">\n";
6181                         }
6182                         $alternate ^= 1;
6183                         %co = parse_commit($set{'commit'});
6184                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6185                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6186                               "<td><i>$author</i></td>\n" .
6187                               "<td>" .
6188                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6189                                       -class => "list subject"},
6190                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6191                 } elsif (defined $set{'to_id'}) {
6192                         next if ($set{'to_id'} =~ m/^0{40}$/);
6193
6194                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6195                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6196                                       -class => "list"},
6197                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6198                               "<br/>\n";
6199                 }
6200         }
6201         close $fd;
6202
6203         # finish last commit (warning: repetition!)
6204         if (%co) {
6205                 print "</td>\n" .
6206                       "<td class=\"link\">" .
6207                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6208                               "commit") .
6209                       " | " .
6210                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6211                                              hash_base=>$co{'id'})},
6212                               "tree") .
6213                       "</td>\n" .
6214                       "</tr>\n";
6215         }
6216
6217         print "</table>\n";
6218
6219         git_footer_html();
6220 }
6221
6222 sub git_search_files {
6223         my %co = @_;
6224
6225         local $/ = "\n";
6226         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6227                 $search_use_regexp ? ('-E', '-i') : '-F',
6228                 $searchtext, $co{'tree'}
6229                         or die_error(500, "Open git-grep failed");
6230
6231         git_header_html();
6232
6233         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6234         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6235
6236         print "<table class=\"grep_search\">\n";
6237         my $alternate = 1;
6238         my $matches = 0;
6239         my $lastfile = '';
6240         my $file_href;
6241         while (my $line = <$fd>) {
6242                 chomp $line;
6243                 my ($file, $lno, $ltext, $binary);
6244                 last if ($matches++ > 1000);
6245                 if ($line =~ /^Binary file (.+) matches$/) {
6246                         $file = $1;
6247                         $binary = 1;
6248                 } else {
6249                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6250                         $file =~ s/^$co{'tree'}://;
6251                 }
6252                 if ($file ne $lastfile) {
6253                         $lastfile and print "</td></tr>\n";
6254                         if ($alternate++) {
6255                                 print "<tr class=\"dark\">\n";
6256                         } else {
6257                                 print "<tr class=\"light\">\n";
6258                         }
6259                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6260                                           file_name=>$file);
6261                         print "<td class=\"list\">".
6262                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6263                         print "</td><td>\n";
6264                         $lastfile = $file;
6265                 }
6266                 if ($binary) {
6267                         print "<div class=\"binary\">Binary file</div>\n";
6268                 } else {
6269                         $ltext = untabify($ltext);
6270                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6271                                 $ltext = esc_html($1, -nbsp=>1);
6272                                 $ltext .= '<span class="match">';
6273                                 $ltext .= esc_html($2, -nbsp=>1);
6274                                 $ltext .= '</span>';
6275                                 $ltext .= esc_html($3, -nbsp=>1);
6276                         } else {
6277                                 $ltext = esc_html($ltext, -nbsp=>1);
6278                         }
6279                         print "<div class=\"pre\">" .
6280                                 $cgi->a({-href => $file_href.'#l'.$lno,
6281                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6282                                 ' ' .  $ltext . "</div>\n";
6283                 }
6284         }
6285         if ($lastfile) {
6286                 print "</td></tr>\n";
6287                 if ($matches > 1000) {
6288                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6289                 }
6290         } else {
6291                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6292         }
6293         close $fd;
6294
6295         print "</table>\n";
6296
6297         git_footer_html();
6298 }
6299
6300 sub git_search_grep_body {
6301         my ($commitlist, $from, $to, $extra) = @_;
6302         $from = 0 unless defined $from;
6303         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6304
6305         print "<table class=\"commit_search\">\n";
6306         my $alternate = 1;
6307         for (my $i = $from; $i <= $to; $i++) {
6308                 my %co = %{$commitlist->[$i]};
6309                 if (!%co) {
6310                         next;
6311                 }
6312                 my $commit = $co{'id'};
6313                 if ($alternate) {
6314                         print "<tr class=\"dark\">\n";
6315                 } else {
6316                         print "<tr class=\"light\">\n";
6317                 }
6318                 $alternate ^= 1;
6319                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6320                       format_author_html('td', \%co, 15, 5) .
6321                       "<td>" .
6322                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6323                                -class => "list subject"},
6324                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6325                 my $comment = $co{'comment'};
6326                 foreach my $line (@$comment) {
6327                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6328                                 my ($lead, $match, $trail) = ($1, $2, $3);
6329                                 $match = chop_str($match, 70, 5, 'center');
6330                                 my $contextlen = int((80 - length($match))/2);
6331                                 $contextlen = 30 if ($contextlen > 30);
6332                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6333                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6334
6335                                 $lead  = esc_html($lead);
6336                                 $match = esc_html($match);
6337                                 $trail = esc_html($trail);
6338
6339                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6340                         }
6341                 }
6342                 print "</td>\n" .
6343                       "<td class=\"link\">" .
6344                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6345                       " | " .
6346                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6347                       " | " .
6348                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6349                 print "</td>\n" .
6350                       "</tr>\n";
6351         }
6352         if (defined $extra) {
6353                 print "<tr>\n" .
6354                       "<td colspan=\"3\">$extra</td>\n" .
6355                       "</tr>\n";
6356         }
6357         print "</table>\n";
6358 }
6359
6360 ## ======================================================================
6361 ## ======================================================================
6362 ## actions
6363
6364 sub git_project_list {
6365         my $order = $input_params{'order'};
6366         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6367                 die_error(400, "Unknown order parameter");
6368         }
6369
6370         my @list = git_get_projects_list($project_filter, $strict_export);
6371         if (!@list) {
6372                 die_error(404, "No projects found");
6373         }
6374
6375         git_header_html();
6376         if (defined $home_text && -f $home_text) {
6377                 print "<div class=\"index_include\">\n";
6378                 insert_file($home_text);
6379                 print "</div>\n";
6380         }
6381
6382         git_project_search_form($searchtext, $search_use_regexp);
6383         git_project_list_body(\@list, $order);
6384         git_footer_html();
6385 }
6386
6387 sub git_forks {
6388         my $order = $input_params{'order'};
6389         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6390                 die_error(400, "Unknown order parameter");
6391         }
6392
6393         my $filter = $project;
6394         $filter =~ s/\.git$//;
6395         my @list = git_get_projects_list($filter);
6396         if (!@list) {
6397                 die_error(404, "No forks found");
6398         }
6399
6400         git_header_html();
6401         git_print_page_nav('','');
6402         git_print_header_div('summary', "$project forks");
6403         git_project_list_body(\@list, $order);
6404         git_footer_html();
6405 }
6406
6407 sub git_project_index {
6408         my @projects = git_get_projects_list($project_filter, $strict_export);
6409         if (!@projects) {
6410                 die_error(404, "No projects found");
6411         }
6412
6413         print $cgi->header(
6414                 -type => 'text/plain',
6415                 -charset => 'utf-8',
6416                 -content_disposition => 'inline; filename="index.aux"');
6417
6418         foreach my $pr (@projects) {
6419                 if (!exists $pr->{'owner'}) {
6420                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6421                 }
6422
6423                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6424                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6425                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6426                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6427                 $path  =~ s/ /\+/g;
6428                 $owner =~ s/ /\+/g;
6429
6430                 print "$path $owner\n";
6431         }
6432 }
6433
6434 sub git_summary {
6435         my $descr = git_get_project_description($project) || "none";
6436         my %co = parse_commit("HEAD");
6437         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6438         my $head = $co{'id'};
6439         my $remote_heads = gitweb_check_feature('remote_heads');
6440
6441         my $owner = git_get_project_owner($project);
6442
6443         my $refs = git_get_references();
6444         # These get_*_list functions return one more to allow us to see if
6445         # there are more ...
6446         my @taglist  = git_get_tags_list(16);
6447         my @headlist = git_get_heads_list(16);
6448         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6449         my @forklist;
6450         my $check_forks = gitweb_check_feature('forks');
6451
6452         if ($check_forks) {
6453                 # find forks of a project
6454                 my $filter = $project;
6455                 $filter =~ s/\.git$//;
6456                 @forklist = git_get_projects_list($filter);
6457                 # filter out forks of forks
6458                 @forklist = filter_forks_from_projects_list(\@forklist)
6459                         if (@forklist);
6460         }
6461
6462         git_header_html();
6463         git_print_page_nav('summary','', $head);
6464
6465         print "<div class=\"title\">&nbsp;</div>\n";
6466         print "<table class=\"projects_list\">\n" .
6467               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6468         unless ($omit_owner) {
6469                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6470         }
6471         if (defined $cd{'rfc2822'}) {
6472                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6473                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6474         }
6475
6476         # use per project git URL list in $projectroot/$project/cloneurl
6477         # or make project git URL from git base URL and project name
6478         my $url_tag = "URL";
6479         my @url_list = git_get_project_url_list($project);
6480         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6481         foreach my $git_url (@url_list) {
6482                 next unless $git_url;
6483                 print format_repo_url($url_tag, $git_url);
6484                 $url_tag = "";
6485         }
6486
6487         # Tag cloud
6488         my $show_ctags = gitweb_check_feature('ctags');
6489         if ($show_ctags) {
6490                 my $ctags = git_get_project_ctags($project);
6491                 if (%$ctags) {
6492                         # without ability to add tags, don't show if there are none
6493                         my $cloud = git_populate_project_tagcloud($ctags);
6494                         print "<tr id=\"metadata_ctags\">" .
6495                               "<td>content tags</td>" .
6496                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6497                               "</tr>\n";
6498                 }
6499         }
6500
6501         print "</table>\n";
6502
6503         # If XSS prevention is on, we don't include README.html.
6504         # TODO: Allow a readme in some safe format.
6505         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6506                 print "<div class=\"title\">readme</div>\n" .
6507                       "<div class=\"readme\">\n";
6508                 insert_file("$projectroot/$project/README.html");
6509                 print "\n</div>\n"; # class="readme"
6510         }
6511
6512         # we need to request one more than 16 (0..15) to check if
6513         # those 16 are all
6514         my @commitlist = $head ? parse_commits($head, 17) : ();
6515         if (@commitlist) {
6516                 git_print_header_div('shortlog');
6517                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6518                                   $#commitlist <=  15 ? undef :
6519                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6520         }
6521
6522         if (@taglist) {
6523                 git_print_header_div('tags');
6524                 git_tags_body(\@taglist, 0, 15,
6525                               $#taglist <=  15 ? undef :
6526                               $cgi->a({-href => href(action=>"tags")}, "..."));
6527         }
6528
6529         if (@headlist) {
6530                 git_print_header_div('heads');
6531                 git_heads_body(\@headlist, $head, 0, 15,
6532                                $#headlist <= 15 ? undef :
6533                                $cgi->a({-href => href(action=>"heads")}, "..."));
6534         }
6535
6536         if (%remotedata) {
6537                 git_print_header_div('remotes');
6538                 git_remotes_body(\%remotedata, 15, $head);
6539         }
6540
6541         if (@forklist) {
6542                 git_print_header_div('forks');
6543                 git_project_list_body(\@forklist, 'age', 0, 15,
6544                                       $#forklist <= 15 ? undef :
6545                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6546                                       'no_header');
6547         }
6548
6549         git_footer_html();
6550 }
6551
6552 sub git_tag {
6553         my %tag = parse_tag($hash);
6554
6555         if (! %tag) {
6556                 die_error(404, "Unknown tag object");
6557         }
6558
6559         my $head = git_get_head_hash($project);
6560         git_header_html();
6561         git_print_page_nav('','', $head,undef,$head);
6562         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6563         print "<div class=\"title_text\">\n" .
6564               "<table class=\"object_header\">\n" .
6565               "<tr>\n" .
6566               "<td>object</td>\n" .
6567               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6568                                $tag{'object'}) . "</td>\n" .
6569               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6570                                               $tag{'type'}) . "</td>\n" .
6571               "</tr>\n";
6572         if (defined($tag{'author'})) {
6573                 git_print_authorship_rows(\%tag, 'author');
6574         }
6575         print "</table>\n\n" .
6576               "</div>\n";
6577         print "<div class=\"page_body\">";
6578         my $comment = $tag{'comment'};
6579         foreach my $line (@$comment) {
6580                 chomp $line;
6581                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6582         }
6583         print "</div>\n";
6584         git_footer_html();
6585 }
6586
6587 sub git_blame_common {
6588         my $format = shift || 'porcelain';
6589         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6590                 $format = 'incremental';
6591                 $action = 'blame_incremental'; # for page title etc
6592         }
6593
6594         # permissions
6595         gitweb_check_feature('blame')
6596                 or die_error(403, "Blame view not allowed");
6597
6598         # error checking
6599         die_error(400, "No file name given") unless $file_name;
6600         $hash_base ||= git_get_head_hash($project);
6601         die_error(404, "Couldn't find base commit") unless $hash_base;
6602         my %co = parse_commit($hash_base)
6603                 or die_error(404, "Commit not found");
6604         my $ftype = "blob";
6605         if (!defined $hash) {
6606                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6607                         or die_error(404, "Error looking up file");
6608         } else {
6609                 $ftype = git_get_type($hash);
6610                 if ($ftype !~ "blob") {
6611                         die_error(400, "Object is not a blob");
6612                 }
6613         }
6614
6615         my $fd;
6616         if ($format eq 'incremental') {
6617                 # get file contents (as base)
6618                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6619                         or die_error(500, "Open git-cat-file failed");
6620         } elsif ($format eq 'data') {
6621                 # run git-blame --incremental
6622                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6623                         $hash_base, "--", $file_name
6624                         or die_error(500, "Open git-blame --incremental failed");
6625         } else {
6626                 # run git-blame --porcelain
6627                 open $fd, "-|", git_cmd(), "blame", '-p',
6628                         $hash_base, '--', $file_name
6629                         or die_error(500, "Open git-blame --porcelain failed");
6630         }
6631
6632         # incremental blame data returns early
6633         if ($format eq 'data') {
6634                 print $cgi->header(
6635                         -type=>"text/plain", -charset => "utf-8",
6636                         -status=> "200 OK");
6637                 local $| = 1; # output autoflush
6638                 while (my $line = <$fd>) {
6639                         print to_utf8($line);
6640                 }
6641                 close $fd
6642                         or print "ERROR $!\n";
6643
6644                 print 'END';
6645                 if (defined $t0 && gitweb_check_feature('timed')) {
6646                         print ' '.
6647                               tv_interval($t0, [ gettimeofday() ]).
6648                               ' '.$number_of_git_cmds;
6649                 }
6650                 print "\n";
6651
6652                 return;
6653         }
6654
6655         # page header
6656         git_header_html();
6657         my $formats_nav =
6658                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6659                         "blob") .
6660                 " | ";
6661         if ($format eq 'incremental') {
6662                 $formats_nav .=
6663                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6664                                 "blame") . " (non-incremental)";
6665         } else {
6666                 $formats_nav .=
6667                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6668                                 "blame") . " (incremental)";
6669         }
6670         $formats_nav .=
6671                 " | " .
6672                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6673                         "history") .
6674                 " | " .
6675                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6676                         "HEAD");
6677         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6678         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6679         git_print_page_path($file_name, $ftype, $hash_base);
6680
6681         # page body
6682         if ($format eq 'incremental') {
6683                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6684                       "This page requires JavaScript to run.\n Use ".
6685                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6686                               'this page').
6687                       " instead.\n".
6688                       "</b></center></div>\n</noscript>\n";
6689
6690                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6691         }
6692
6693         print qq!<div class="page_body">\n!;
6694         print qq!<div id="progress_info">... / ...</div>\n!
6695                 if ($format eq 'incremental');
6696         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6697               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6698               qq!<thead>\n!.
6699               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6700               qq!</thead>\n!.
6701               qq!<tbody>\n!;
6702
6703         my @rev_color = qw(light dark);
6704         my $num_colors = scalar(@rev_color);
6705         my $current_color = 0;
6706
6707         if ($format eq 'incremental') {
6708                 my $color_class = $rev_color[$current_color];
6709
6710                 #contents of a file
6711                 my $linenr = 0;
6712         LINE:
6713                 while (my $line = <$fd>) {
6714                         chomp $line;
6715                         $linenr++;
6716
6717                         print qq!<tr id="l$linenr" class="$color_class">!.
6718                               qq!<td class="sha1"><a href=""> </a></td>!.
6719                               qq!<td class="linenr">!.
6720                               qq!<a class="linenr" href="">$linenr</a></td>!;
6721                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6722                         print qq!</tr>\n!;
6723                 }
6724
6725         } else { # porcelain, i.e. ordinary blame
6726                 my %metainfo = (); # saves information about commits
6727
6728                 # blame data
6729         LINE:
6730                 while (my $line = <$fd>) {
6731                         chomp $line;
6732                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6733                         # no <lines in group> for subsequent lines in group of lines
6734                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6735                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6736                         if (!exists $metainfo{$full_rev}) {
6737                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6738                         }
6739                         my $meta = $metainfo{$full_rev};
6740                         my $data;
6741                         while ($data = <$fd>) {
6742                                 chomp $data;
6743                                 last if ($data =~ s/^\t//); # contents of line
6744                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6745                                         $meta->{$1} = $2 unless exists $meta->{$1};
6746                                 }
6747                                 if ($data =~ /^previous /) {
6748                                         $meta->{'nprevious'}++;
6749                                 }
6750                         }
6751                         my $short_rev = substr($full_rev, 0, 8);
6752                         my $author = $meta->{'author'};
6753                         my %date =
6754                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6755                         my $date = $date{'iso-tz'};
6756                         if ($group_size) {
6757                                 $current_color = ($current_color + 1) % $num_colors;
6758                         }
6759                         my $tr_class = $rev_color[$current_color];
6760                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6761                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6762                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6763                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6764                         if ($group_size) {
6765                                 print "<td class=\"sha1\"";
6766                                 print " title=\"". esc_html($author) . ", $date\"";
6767                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6768                                 print ">";
6769                                 print $cgi->a({-href => href(action=>"commit",
6770                                                              hash=>$full_rev,
6771                                                              file_name=>$file_name)},
6772                                               esc_html($short_rev));
6773                                 if ($group_size >= 2) {
6774                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6775                                         if (@author_initials) {
6776                                                 print "<br />" .
6777                                                       esc_html(join('', @author_initials));
6778                                                 #           or join('.', ...)
6779                                         }
6780                                 }
6781                                 print "</td>\n";
6782                         }
6783                         # 'previous' <sha1 of parent commit> <filename at commit>
6784                         if (exists $meta->{'previous'} &&
6785                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6786                                 $meta->{'parent'} = $1;
6787                                 $meta->{'file_parent'} = unquote($2);
6788                         }
6789                         my $linenr_commit =
6790                                 exists($meta->{'parent'}) ?
6791                                 $meta->{'parent'} : $full_rev;
6792                         my $linenr_filename =
6793                                 exists($meta->{'file_parent'}) ?
6794                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6795                         my $blamed = href(action => 'blame',
6796                                           file_name => $linenr_filename,
6797                                           hash_base => $linenr_commit);
6798                         print "<td class=\"linenr\">";
6799                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6800                                         -class => "linenr" },
6801                                       esc_html($lineno));
6802                         print "</td>";
6803                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6804                         print "</tr>\n";
6805                 } # end while
6806
6807         }
6808
6809         # footer
6810         print "</tbody>\n".
6811               "</table>\n"; # class="blame"
6812         print "</div>\n";   # class="blame_body"
6813         close $fd
6814                 or print "Reading blob failed\n";
6815
6816         git_footer_html();
6817 }
6818
6819 sub git_blame {
6820         git_blame_common();
6821 }
6822
6823 sub git_blame_incremental {
6824         git_blame_common('incremental');
6825 }
6826
6827 sub git_blame_data {
6828         git_blame_common('data');
6829 }
6830
6831 sub git_tags {
6832         my $head = git_get_head_hash($project);
6833         git_header_html();
6834         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6835         git_print_header_div('summary', $project);
6836
6837         my @tagslist = git_get_tags_list();
6838         if (@tagslist) {
6839                 git_tags_body(\@tagslist);
6840         }
6841         git_footer_html();
6842 }
6843
6844 sub git_heads {
6845         my $head = git_get_head_hash($project);
6846         git_header_html();
6847         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6848         git_print_header_div('summary', $project);
6849
6850         my @headslist = git_get_heads_list();
6851         if (@headslist) {
6852                 git_heads_body(\@headslist, $head);
6853         }
6854         git_footer_html();
6855 }
6856
6857 # used both for single remote view and for list of all the remotes
6858 sub git_remotes {
6859         gitweb_check_feature('remote_heads')
6860                 or die_error(403, "Remote heads view is disabled");
6861
6862         my $head = git_get_head_hash($project);
6863         my $remote = $input_params{'hash'};
6864
6865         my $remotedata = git_get_remotes_list($remote);
6866         die_error(500, "Unable to get remote information") unless defined $remotedata;
6867
6868         unless (%$remotedata) {
6869                 die_error(404, defined $remote ?
6870                         "Remote $remote not found" :
6871                         "No remotes found");
6872         }
6873
6874         git_header_html(undef, undef, -action_extra => $remote);
6875         git_print_page_nav('', '',  $head, undef, $head,
6876                 format_ref_views($remote ? '' : 'remotes'));
6877
6878         fill_remote_heads($remotedata);
6879         if (defined $remote) {
6880                 git_print_header_div('remotes', "$remote remote for $project");
6881                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6882         } else {
6883                 git_print_header_div('summary', "$project remotes");
6884                 git_remotes_body($remotedata, undef, $head);
6885         }
6886
6887         git_footer_html();
6888 }
6889
6890 sub git_blob_plain {
6891         my $type = shift;
6892         my $expires;
6893
6894         if (!defined $hash) {
6895                 if (defined $file_name) {
6896                         my $base = $hash_base || git_get_head_hash($project);
6897                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6898                                 or die_error(404, "Cannot find file");
6899                 } else {
6900                         die_error(400, "No file name defined");
6901                 }
6902         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6903                 # blobs defined by non-textual hash id's can be cached
6904                 $expires = "+1d";
6905         }
6906
6907         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6908                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6909
6910         # content-type (can include charset)
6911         $type = blob_contenttype($fd, $file_name, $type);
6912
6913         # "save as" filename, even when no $file_name is given
6914         my $save_as = "$hash";
6915         if (defined $file_name) {
6916                 $save_as = $file_name;
6917         } elsif ($type =~ m/^text\//) {
6918                 $save_as .= '.txt';
6919         }
6920
6921         # With XSS prevention on, blobs of all types except a few known safe
6922         # ones are served with "Content-Disposition: attachment" to make sure
6923         # they don't run in our security domain.  For certain image types,
6924         # blob view writes an <img> tag referring to blob_plain view, and we
6925         # want to be sure not to break that by serving the image as an
6926         # attachment (though Firefox 3 doesn't seem to care).
6927         my $sandbox = $prevent_xss &&
6928                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6929
6930         # serve text/* as text/plain
6931         if ($prevent_xss &&
6932             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6933              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6934                 my $rest = $1;
6935                 $rest = defined $rest ? $rest : '';
6936                 $type = "text/plain$rest";
6937         }
6938
6939         print $cgi->header(
6940                 -type => $type,
6941                 -expires => $expires,
6942                 -content_disposition =>
6943                         ($sandbox ? 'attachment' : 'inline')
6944                         . '; filename="' . $save_as . '"');
6945         local $/ = undef;
6946         binmode STDOUT, ':raw';
6947         print <$fd>;
6948         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6949         close $fd;
6950 }
6951
6952 sub git_blob {
6953         my $expires;
6954
6955         if (!defined $hash) {
6956                 if (defined $file_name) {
6957                         my $base = $hash_base || git_get_head_hash($project);
6958                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6959                                 or die_error(404, "Cannot find file");
6960                 } else {
6961                         die_error(400, "No file name defined");
6962                 }
6963         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6964                 # blobs defined by non-textual hash id's can be cached
6965                 $expires = "+1d";
6966         }
6967
6968         my $have_blame = gitweb_check_feature('blame');
6969         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6970                 or die_error(500, "Couldn't cat $file_name, $hash");
6971         my $mimetype = blob_mimetype($fd, $file_name);
6972         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6973         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6974                 close $fd;
6975                 return git_blob_plain($mimetype);
6976         }
6977         # we can have blame only for text/* mimetype
6978         $have_blame &&= ($mimetype =~ m!^text/!);
6979
6980         my $highlight = gitweb_check_feature('highlight');
6981         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6982         $fd = run_highlighter($fd, $highlight, $syntax)
6983                 if $syntax;
6984
6985         git_header_html(undef, $expires);
6986         my $formats_nav = '';
6987         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6988                 if (defined $file_name) {
6989                         if ($have_blame) {
6990                                 $formats_nav .=
6991                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6992                                                 "blame") .
6993                                         " | ";
6994                         }
6995                         $formats_nav .=
6996                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6997                                         "history") .
6998                                 " | " .
6999                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7000                                         "raw") .
7001                                 " | " .
7002                                 $cgi->a({-href => href(action=>"blob",
7003                                                        hash_base=>"HEAD", file_name=>$file_name)},
7004                                         "HEAD");
7005                 } else {
7006                         $formats_nav .=
7007                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7008                                         "raw");
7009                 }
7010                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7011                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7012         } else {
7013                 print "<div class=\"page_nav\">\n" .
7014                       "<br/><br/></div>\n" .
7015                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7016         }
7017         git_print_page_path($file_name, "blob", $hash_base);
7018         print "<div class=\"page_body\">\n";
7019         if ($mimetype =~ m!^image/!) {
7020                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7021                 if ($file_name) {
7022                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7023                 }
7024                 print qq! src="! .
7025                       href(action=>"blob_plain", hash=>$hash,
7026                            hash_base=>$hash_base, file_name=>$file_name) .
7027                       qq!" />\n!;
7028         } else {
7029                 my $nr;
7030                 while (my $line = <$fd>) {
7031                         chomp $line;
7032                         $nr++;
7033                         $line = untabify($line);
7034                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7035                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7036                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7037                 }
7038         }
7039         close $fd
7040                 or print "Reading blob failed.\n";
7041         print "</div>";
7042         git_footer_html();
7043 }
7044
7045 sub git_tree {
7046         if (!defined $hash_base) {
7047                 $hash_base = "HEAD";
7048         }
7049         if (!defined $hash) {
7050                 if (defined $file_name) {
7051                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7052                 } else {
7053                         $hash = $hash_base;
7054                 }
7055         }
7056         die_error(404, "No such tree") unless defined($hash);
7057
7058         my $show_sizes = gitweb_check_feature('show-sizes');
7059         my $have_blame = gitweb_check_feature('blame');
7060
7061         my @entries = ();
7062         {
7063                 local $/ = "\0";
7064                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7065                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7066                         or die_error(500, "Open git-ls-tree failed");
7067                 @entries = map { chomp; $_ } <$fd>;
7068                 close $fd
7069                         or die_error(404, "Reading tree failed");
7070         }
7071
7072         my $refs = git_get_references();
7073         my $ref = format_ref_marker($refs, $hash_base);
7074         git_header_html();
7075         my $basedir = '';
7076         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7077                 my @views_nav = ();
7078                 if (defined $file_name) {
7079                         push @views_nav,
7080                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7081                                         "history"),
7082                                 $cgi->a({-href => href(action=>"tree",
7083                                                        hash_base=>"HEAD", file_name=>$file_name)},
7084                                         "HEAD"),
7085                 }
7086                 my $snapshot_links = format_snapshot_links($hash);
7087                 if (defined $snapshot_links) {
7088                         # FIXME: Should be available when we have no hash base as well.
7089                         push @views_nav, $snapshot_links;
7090                 }
7091                 git_print_page_nav('tree','', $hash_base, undef, undef,
7092                                    join(' | ', @views_nav));
7093                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7094         } else {
7095                 undef $hash_base;
7096                 print "<div class=\"page_nav\">\n";
7097                 print "<br/><br/></div>\n";
7098                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7099         }
7100         if (defined $file_name) {
7101                 $basedir = $file_name;
7102                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7103                         $basedir .= '/';
7104                 }
7105                 git_print_page_path($file_name, 'tree', $hash_base);
7106         }
7107         print "<div class=\"page_body\">\n";
7108         print "<table class=\"tree\">\n";
7109         my $alternate = 1;
7110         # '..' (top directory) link if possible
7111         if (defined $hash_base &&
7112             defined $file_name && $file_name =~ m![^/]+$!) {
7113                 if ($alternate) {
7114                         print "<tr class=\"dark\">\n";
7115                 } else {
7116                         print "<tr class=\"light\">\n";
7117                 }
7118                 $alternate ^= 1;
7119
7120                 my $up = $file_name;
7121                 $up =~ s!/?[^/]+$!!;
7122                 undef $up unless $up;
7123                 # based on git_print_tree_entry
7124                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7125                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7126                 print '<td class="list">';
7127                 print $cgi->a({-href => href(action=>"tree",
7128                                              hash_base=>$hash_base,
7129                                              file_name=>$up)},
7130                               "..");
7131                 print "</td>\n";
7132                 print "<td class=\"link\"></td>\n";
7133
7134                 print "</tr>\n";
7135         }
7136         foreach my $line (@entries) {
7137                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7138
7139                 if ($alternate) {
7140                         print "<tr class=\"dark\">\n";
7141                 } else {
7142                         print "<tr class=\"light\">\n";
7143                 }
7144                 $alternate ^= 1;
7145
7146                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7147
7148                 print "</tr>\n";
7149         }
7150         print "</table>\n" .
7151               "</div>";
7152         git_footer_html();
7153 }
7154
7155 sub snapshot_name {
7156         my ($project, $hash) = @_;
7157
7158         # path/to/project.git  -> project
7159         # path/to/project/.git -> project
7160         my $name = to_utf8($project);
7161         $name =~ s,([^/])/*\.git$,$1,;
7162         $name = basename($name);
7163         # sanitize name
7164         $name =~ s/[[:cntrl:]]/?/g;
7165
7166         my $ver = $hash;
7167         if ($hash =~ /^[0-9a-fA-F]+$/) {
7168                 # shorten SHA-1 hash
7169                 my $full_hash = git_get_full_hash($project, $hash);
7170                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7171                         $ver = git_get_short_hash($project, $hash);
7172                 }
7173         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7174                 # tags don't need shortened SHA-1 hash
7175                 $ver = $1;
7176         } else {
7177                 # branches and other need shortened SHA-1 hash
7178                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7179                         $ver = $1;
7180                 }
7181                 $ver .= '-' . git_get_short_hash($project, $hash);
7182         }
7183         # in case of hierarchical branch names
7184         $ver =~ s!/!.!g;
7185
7186         # name = project-version_string
7187         $name = "$name-$ver";
7188
7189         return wantarray ? ($name, $name) : $name;
7190 }
7191
7192 sub exit_if_unmodified_since {
7193         my ($latest_epoch) = @_;
7194         our $cgi;
7195
7196         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7197         if (defined $if_modified) {
7198                 my $since;
7199                 if (eval { require HTTP::Date; 1; }) {
7200                         $since = HTTP::Date::str2time($if_modified);
7201                 } elsif (eval { require Time::ParseDate; 1; }) {
7202                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7203                 }
7204                 if (defined $since && $latest_epoch <= $since) {
7205                         my %latest_date = parse_date($latest_epoch);
7206                         print $cgi->header(
7207                                 -last_modified => $latest_date{'rfc2822'},
7208                                 -status => '304 Not Modified');
7209                         goto DONE_GITWEB;
7210                 }
7211         }
7212 }
7213
7214 sub git_snapshot {
7215         my $format = $input_params{'snapshot_format'};
7216         if (!@snapshot_fmts) {
7217                 die_error(403, "Snapshots not allowed");
7218         }
7219         # default to first supported snapshot format
7220         $format ||= $snapshot_fmts[0];
7221         if ($format !~ m/^[a-z0-9]+$/) {
7222                 die_error(400, "Invalid snapshot format parameter");
7223         } elsif (!exists($known_snapshot_formats{$format})) {
7224                 die_error(400, "Unknown snapshot format");
7225         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7226                 die_error(403, "Snapshot format not allowed");
7227         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7228                 die_error(403, "Unsupported snapshot format");
7229         }
7230
7231         my $type = git_get_type("$hash^{}");
7232         if (!$type) {
7233                 die_error(404, 'Object does not exist');
7234         }  elsif ($type eq 'blob') {
7235                 die_error(400, 'Object is not a tree-ish');
7236         }
7237
7238         my ($name, $prefix) = snapshot_name($project, $hash);
7239         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7240
7241         my %co = parse_commit($hash);
7242         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7243
7244         my $cmd = quote_command(
7245                 git_cmd(), 'archive',
7246                 "--format=$known_snapshot_formats{$format}{'format'}",
7247                 "--prefix=$prefix/", $hash);
7248         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7249                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7250         }
7251
7252         $filename =~ s/(["\\])/\\$1/g;
7253         my %latest_date;
7254         if (%co) {
7255                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7256         }
7257
7258         print $cgi->header(
7259                 -type => $known_snapshot_formats{$format}{'type'},
7260                 -content_disposition => 'inline; filename="' . $filename . '"',
7261                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7262                 -status => '200 OK');
7263
7264         open my $fd, "-|", $cmd
7265                 or die_error(500, "Execute git-archive failed");
7266         binmode STDOUT, ':raw';
7267         print <$fd>;
7268         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7269         close $fd;
7270 }
7271
7272 sub git_log_generic {
7273         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7274
7275         my $head = git_get_head_hash($project);
7276         if (!defined $base) {
7277                 $base = $head;
7278         }
7279         if (!defined $page) {
7280                 $page = 0;
7281         }
7282         my $refs = git_get_references();
7283
7284         my $commit_hash = $base;
7285         if (defined $parent) {
7286                 $commit_hash = "$parent..$base";
7287         }
7288         my @commitlist =
7289                 parse_commits($commit_hash, 101, (100 * $page),
7290                               defined $file_name ? ($file_name, "--full-history") : ());
7291
7292         my $ftype;
7293         if (!defined $file_hash && defined $file_name) {
7294                 # some commits could have deleted file in question,
7295                 # and not have it in tree, but one of them has to have it
7296                 for (my $i = 0; $i < @commitlist; $i++) {
7297                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7298                         last if defined $file_hash;
7299                 }
7300         }
7301         if (defined $file_hash) {
7302                 $ftype = git_get_type($file_hash);
7303         }
7304         if (defined $file_name && !defined $ftype) {
7305                 die_error(500, "Unknown type of object");
7306         }
7307         my %co;
7308         if (defined $file_name) {
7309                 %co = parse_commit($base)
7310                         or die_error(404, "Unknown commit object");
7311         }
7312
7313
7314         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7315         my $next_link = '';
7316         if ($#commitlist >= 100) {
7317                 $next_link =
7318                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7319                                  -accesskey => "n", -title => "Alt-n"}, "next");
7320         }
7321         my $patch_max = gitweb_get_feature('patches');
7322         if ($patch_max && !defined $file_name) {
7323                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7324                         $paging_nav .= " &sdot; " .
7325                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7326                                         "patches");
7327                 }
7328         }
7329
7330         git_header_html();
7331         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7332         if (defined $file_name) {
7333                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7334         } else {
7335                 git_print_header_div('summary', $project)
7336         }
7337         git_print_page_path($file_name, $ftype, $hash_base)
7338                 if (defined $file_name);
7339
7340         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7341                      $file_name, $file_hash, $ftype);
7342
7343         git_footer_html();
7344 }
7345
7346 sub git_log {
7347         git_log_generic('log', \&git_log_body,
7348                         $hash, $hash_parent);
7349 }
7350
7351 sub git_commit {
7352         $hash ||= $hash_base || "HEAD";
7353         my %co = parse_commit($hash)
7354             or die_error(404, "Unknown commit object");
7355
7356         my $parent  = $co{'parent'};
7357         my $parents = $co{'parents'}; # listref
7358
7359         # we need to prepare $formats_nav before any parameter munging
7360         my $formats_nav;
7361         if (!defined $parent) {
7362                 # --root commitdiff
7363                 $formats_nav .= '(initial)';
7364         } elsif (@$parents == 1) {
7365                 # single parent commit
7366                 $formats_nav .=
7367                         '(parent: ' .
7368                         $cgi->a({-href => href(action=>"commit",
7369                                                hash=>$parent)},
7370                                 esc_html(substr($parent, 0, 7))) .
7371                         ')';
7372         } else {
7373                 # merge commit
7374                 $formats_nav .=
7375                         '(merge: ' .
7376                         join(' ', map {
7377                                 $cgi->a({-href => href(action=>"commit",
7378                                                        hash=>$_)},
7379                                         esc_html(substr($_, 0, 7)));
7380                         } @$parents ) .
7381                         ')';
7382         }
7383         if (gitweb_check_feature('patches') && @$parents <= 1) {
7384                 $formats_nav .= " | " .
7385                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7386                                 "patch");
7387         }
7388
7389         if (!defined $parent) {
7390                 $parent = "--root";
7391         }
7392         my @difftree;
7393         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7394                 @diff_opts,
7395                 (@$parents <= 1 ? $parent : '-c'),
7396                 $hash, "--"
7397                 or die_error(500, "Open git-diff-tree failed");
7398         @difftree = map { chomp; $_ } <$fd>;
7399         close $fd or die_error(404, "Reading git-diff-tree failed");
7400
7401         # non-textual hash id's can be cached
7402         my $expires;
7403         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7404                 $expires = "+1d";
7405         }
7406         my $refs = git_get_references();
7407         my $ref = format_ref_marker($refs, $co{'id'});
7408
7409         git_header_html(undef, $expires);
7410         git_print_page_nav('commit', '',
7411                            $hash, $co{'tree'}, $hash,
7412                            $formats_nav);
7413
7414         if (defined $co{'parent'}) {
7415                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7416         } else {
7417                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7418         }
7419         print "<div class=\"title_text\">\n" .
7420               "<table class=\"object_header\">\n";
7421         git_print_authorship_rows(\%co);
7422         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7423         print "<tr>" .
7424               "<td>tree</td>" .
7425               "<td class=\"sha1\">" .
7426               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7427                        class => "list"}, $co{'tree'}) .
7428               "</td>" .
7429               "<td class=\"link\">" .
7430               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7431                       "tree");
7432         my $snapshot_links = format_snapshot_links($hash);
7433         if (defined $snapshot_links) {
7434                 print " | " . $snapshot_links;
7435         }
7436         print "</td>" .
7437               "</tr>\n";
7438
7439         foreach my $par (@$parents) {
7440                 print "<tr>" .
7441                       "<td>parent</td>" .
7442                       "<td class=\"sha1\">" .
7443                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7444                                class => "list"}, $par) .
7445                       "</td>" .
7446                       "<td class=\"link\">" .
7447                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7448                       " | " .
7449                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7450                       "</td>" .
7451                       "</tr>\n";
7452         }
7453         print "</table>".
7454               "</div>\n";
7455
7456         print "<div class=\"page_body\">\n";
7457         git_print_log($co{'comment'});
7458         print "</div>\n";
7459
7460         git_difftree_body(\@difftree, $hash, @$parents);
7461
7462         git_footer_html();
7463 }
7464
7465 sub git_object {
7466         # object is defined by:
7467         # - hash or hash_base alone
7468         # - hash_base and file_name
7469         my $type;
7470
7471         # - hash or hash_base alone
7472         if ($hash || ($hash_base && !defined $file_name)) {
7473                 my $object_id = $hash || $hash_base;
7474
7475                 open my $fd, "-|", quote_command(
7476                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7477                         or die_error(404, "Object does not exist");
7478                 $type = <$fd>;
7479                 chomp $type;
7480                 close $fd
7481                         or die_error(404, "Object does not exist");
7482
7483         # - hash_base and file_name
7484         } elsif ($hash_base && defined $file_name) {
7485                 $file_name =~ s,/+$,,;
7486
7487                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7488                         or die_error(404, "Base object does not exist");
7489
7490                 # here errors should not hapen
7491                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7492                         or die_error(500, "Open git-ls-tree failed");
7493                 my $line = <$fd>;
7494                 close $fd;
7495
7496                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7497                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7498                         die_error(404, "File or directory for given base does not exist");
7499                 }
7500                 $type = $2;
7501                 $hash = $3;
7502         } else {
7503                 die_error(400, "Not enough information to find object");
7504         }
7505
7506         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7507                                           hash=>$hash, hash_base=>$hash_base,
7508                                           file_name=>$file_name),
7509                              -status => '302 Found');
7510 }
7511
7512 sub git_blobdiff {
7513         my $format = shift || 'html';
7514         my $diff_style = $input_params{'diff_style'} || 'inline';
7515
7516         my $fd;
7517         my @difftree;
7518         my %diffinfo;
7519         my $expires;
7520
7521         # preparing $fd and %diffinfo for git_patchset_body
7522         # new style URI
7523         if (defined $hash_base && defined $hash_parent_base) {
7524                 if (defined $file_name) {
7525                         # read raw output
7526                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7527                                 $hash_parent_base, $hash_base,
7528                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7529                                 or die_error(500, "Open git-diff-tree failed");
7530                         @difftree = map { chomp; $_ } <$fd>;
7531                         close $fd
7532                                 or die_error(404, "Reading git-diff-tree failed");
7533                         @difftree
7534                                 or die_error(404, "Blob diff not found");
7535
7536                 } elsif (defined $hash &&
7537                          $hash =~ /[0-9a-fA-F]{40}/) {
7538                         # try to find filename from $hash
7539
7540                         # read filtered raw output
7541                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7542                                 $hash_parent_base, $hash_base, "--"
7543                                 or die_error(500, "Open git-diff-tree failed");
7544                         @difftree =
7545                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7546                                 # $hash == to_id
7547                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7548                                 map { chomp; $_ } <$fd>;
7549                         close $fd
7550                                 or die_error(404, "Reading git-diff-tree failed");
7551                         @difftree
7552                                 or die_error(404, "Blob diff not found");
7553
7554                 } else {
7555                         die_error(400, "Missing one of the blob diff parameters");
7556                 }
7557
7558                 if (@difftree > 1) {
7559                         die_error(400, "Ambiguous blob diff specification");
7560                 }
7561
7562                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7563                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7564                 $file_name   ||= $diffinfo{'to_file'};
7565
7566                 $hash_parent ||= $diffinfo{'from_id'};
7567                 $hash        ||= $diffinfo{'to_id'};
7568
7569                 # non-textual hash id's can be cached
7570                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7571                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7572                         $expires = '+1d';
7573                 }
7574
7575                 # open patch output
7576                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7577                         '-p', ($format eq 'html' ? "--full-index" : ()),
7578                         $hash_parent_base, $hash_base,
7579                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7580                         or die_error(500, "Open git-diff-tree failed");
7581         }
7582
7583         # old/legacy style URI -- not generated anymore since 1.4.3.
7584         if (!%diffinfo) {
7585                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7586         }
7587
7588         # header
7589         if ($format eq 'html') {
7590                 my $formats_nav =
7591                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7592                                 "raw");
7593                 $formats_nav .= diff_style_nav($diff_style);
7594                 git_header_html(undef, $expires);
7595                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7596                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7597                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7598                 } else {
7599                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7600                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7601                 }
7602                 if (defined $file_name) {
7603                         git_print_page_path($file_name, "blob", $hash_base);
7604                 } else {
7605                         print "<div class=\"page_path\"></div>\n";
7606                 }
7607
7608         } elsif ($format eq 'plain') {
7609                 print $cgi->header(
7610                         -type => 'text/plain',
7611                         -charset => 'utf-8',
7612                         -expires => $expires,
7613                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7614
7615                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7616
7617         } else {
7618                 die_error(400, "Unknown blobdiff format");
7619         }
7620
7621         # patch
7622         if ($format eq 'html') {
7623                 print "<div class=\"page_body\">\n";
7624
7625                 git_patchset_body($fd, $diff_style,
7626                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7627                 close $fd;
7628
7629                 print "</div>\n"; # class="page_body"
7630                 git_footer_html();
7631
7632         } else {
7633                 while (my $line = <$fd>) {
7634                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7635                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7636
7637                         print $line;
7638
7639                         last if $line =~ m!^\+\+\+!;
7640                 }
7641                 local $/ = undef;
7642                 print <$fd>;
7643                 close $fd;
7644         }
7645 }
7646
7647 sub git_blobdiff_plain {
7648         git_blobdiff('plain');
7649 }
7650
7651 # assumes that it is added as later part of already existing navigation,
7652 # so it returns "| foo | bar" rather than just "foo | bar"
7653 sub diff_style_nav {
7654         my ($diff_style, $is_combined) = @_;
7655         $diff_style ||= 'inline';
7656
7657         return "" if ($is_combined);
7658
7659         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7660         my %styles = @styles;
7661         @styles =
7662                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7663
7664         return join '',
7665                 map { " | ".$_ }
7666                 map {
7667                         $_ eq $diff_style ? $styles{$_} :
7668                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7669                 } @styles;
7670 }
7671
7672 sub git_commitdiff {
7673         my %params = @_;
7674         my $format = $params{-format} || 'html';
7675         my $diff_style = $input_params{'diff_style'} || 'inline';
7676
7677         my ($patch_max) = gitweb_get_feature('patches');
7678         if ($format eq 'patch') {
7679                 die_error(403, "Patch view not allowed") unless $patch_max;
7680         }
7681
7682         $hash ||= $hash_base || "HEAD";
7683         my %co = parse_commit($hash)
7684             or die_error(404, "Unknown commit object");
7685
7686         # choose format for commitdiff for merge
7687         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7688                 $hash_parent = '--cc';
7689         }
7690         # we need to prepare $formats_nav before almost any parameter munging
7691         my $formats_nav;
7692         if ($format eq 'html') {
7693                 $formats_nav =
7694                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7695                                 "raw");
7696                 if ($patch_max && @{$co{'parents'}} <= 1) {
7697                         $formats_nav .= " | " .
7698                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7699                                         "patch");
7700                 }
7701                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7702
7703                 if (defined $hash_parent &&
7704                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7705                         # commitdiff with two commits given
7706                         my $hash_parent_short = $hash_parent;
7707                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7708                                 $hash_parent_short = substr($hash_parent, 0, 7);
7709                         }
7710                         $formats_nav .=
7711                                 ' (from';
7712                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7713                                 if ($co{'parents'}[$i] eq $hash_parent) {
7714                                         $formats_nav .= ' parent ' . ($i+1);
7715                                         last;
7716                                 }
7717                         }
7718                         $formats_nav .= ': ' .
7719                                 $cgi->a({-href => href(-replay=>1,
7720                                                        hash=>$hash_parent, hash_base=>undef)},
7721                                         esc_html($hash_parent_short)) .
7722                                 ')';
7723                 } elsif (!$co{'parent'}) {
7724                         # --root commitdiff
7725                         $formats_nav .= ' (initial)';
7726                 } elsif (scalar @{$co{'parents'}} == 1) {
7727                         # single parent commit
7728                         $formats_nav .=
7729                                 ' (parent: ' .
7730                                 $cgi->a({-href => href(-replay=>1,
7731                                                        hash=>$co{'parent'}, hash_base=>undef)},
7732                                         esc_html(substr($co{'parent'}, 0, 7))) .
7733                                 ')';
7734                 } else {
7735                         # merge commit
7736                         if ($hash_parent eq '--cc') {
7737                                 $formats_nav .= ' | ' .
7738                                         $cgi->a({-href => href(-replay=>1,
7739                                                                hash=>$hash, hash_parent=>'-c')},
7740                                                 'combined');
7741                         } else { # $hash_parent eq '-c'
7742                                 $formats_nav .= ' | ' .
7743                                         $cgi->a({-href => href(-replay=>1,
7744                                                                hash=>$hash, hash_parent=>'--cc')},
7745                                                 'compact');
7746                         }
7747                         $formats_nav .=
7748                                 ' (merge: ' .
7749                                 join(' ', map {
7750                                         $cgi->a({-href => href(-replay=>1,
7751                                                                hash=>$_, hash_base=>undef)},
7752                                                 esc_html(substr($_, 0, 7)));
7753                                 } @{$co{'parents'}} ) .
7754                                 ')';
7755                 }
7756         }
7757
7758         my $hash_parent_param = $hash_parent;
7759         if (!defined $hash_parent_param) {
7760                 # --cc for multiple parents, --root for parentless
7761                 $hash_parent_param =
7762                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7763         }
7764
7765         # read commitdiff
7766         my $fd;
7767         my @difftree;
7768         if ($format eq 'html') {
7769                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7770                         "--no-commit-id", "--patch-with-raw", "--full-index",
7771                         $hash_parent_param, $hash, "--"
7772                         or die_error(500, "Open git-diff-tree failed");
7773
7774                 while (my $line = <$fd>) {
7775                         chomp $line;
7776                         # empty line ends raw part of diff-tree output
7777                         last unless $line;
7778                         push @difftree, scalar parse_difftree_raw_line($line);
7779                 }
7780
7781         } elsif ($format eq 'plain') {
7782                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7783                         '-p', $hash_parent_param, $hash, "--"
7784                         or die_error(500, "Open git-diff-tree failed");
7785         } elsif ($format eq 'patch') {
7786                 # For commit ranges, we limit the output to the number of
7787                 # patches specified in the 'patches' feature.
7788                 # For single commits, we limit the output to a single patch,
7789                 # diverging from the git-format-patch default.
7790                 my @commit_spec = ();
7791                 if ($hash_parent) {
7792                         if ($patch_max > 0) {
7793                                 push @commit_spec, "-$patch_max";
7794                         }
7795                         push @commit_spec, '-n', "$hash_parent..$hash";
7796                 } else {
7797                         if ($params{-single}) {
7798                                 push @commit_spec, '-1';
7799                         } else {
7800                                 if ($patch_max > 0) {
7801                                         push @commit_spec, "-$patch_max";
7802                                 }
7803                                 push @commit_spec, "-n";
7804                         }
7805                         push @commit_spec, '--root', $hash;
7806                 }
7807                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7808                         '--encoding=utf8', '--stdout', @commit_spec
7809                         or die_error(500, "Open git-format-patch failed");
7810         } else {
7811                 die_error(400, "Unknown commitdiff format");
7812         }
7813
7814         # non-textual hash id's can be cached
7815         my $expires;
7816         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7817                 $expires = "+1d";
7818         }
7819
7820         # write commit message
7821         if ($format eq 'html') {
7822                 my $refs = git_get_references();
7823                 my $ref = format_ref_marker($refs, $co{'id'});
7824
7825                 git_header_html(undef, $expires);
7826                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7827                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7828                 print "<div class=\"title_text\">\n" .
7829                       "<table class=\"object_header\">\n";
7830                 git_print_authorship_rows(\%co);
7831                 print "</table>".
7832                       "</div>\n";
7833                 print "<div class=\"page_body\">\n";
7834                 if (@{$co{'comment'}} > 1) {
7835                         print "<div class=\"log\">\n";
7836                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7837                         print "</div>\n"; # class="log"
7838                 }
7839
7840         } elsif ($format eq 'plain') {
7841                 my $refs = git_get_references("tags");
7842                 my $tagname = git_get_rev_name_tags($hash);
7843                 my $filename = basename($project) . "-$hash.patch";
7844
7845                 print $cgi->header(
7846                         -type => 'text/plain',
7847                         -charset => 'utf-8',
7848                         -expires => $expires,
7849                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7850                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7851                 print "From: " . to_utf8($co{'author'}) . "\n";
7852                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7853                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7854
7855                 print "X-Git-Tag: $tagname\n" if $tagname;
7856                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7857
7858                 foreach my $line (@{$co{'comment'}}) {
7859                         print to_utf8($line) . "\n";
7860                 }
7861                 print "---\n\n";
7862         } elsif ($format eq 'patch') {
7863                 my $filename = basename($project) . "-$hash.patch";
7864
7865                 print $cgi->header(
7866                         -type => 'text/plain',
7867                         -charset => 'utf-8',
7868                         -expires => $expires,
7869                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7870         }
7871
7872         # write patch
7873         if ($format eq 'html') {
7874                 my $use_parents = !defined $hash_parent ||
7875                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7876                 git_difftree_body(\@difftree, $hash,
7877                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7878                 print "<br/>\n";
7879
7880                 git_patchset_body($fd, $diff_style,
7881                                   \@difftree, $hash,
7882                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7883                 close $fd;
7884                 print "</div>\n"; # class="page_body"
7885                 git_footer_html();
7886
7887         } elsif ($format eq 'plain') {
7888                 local $/ = undef;
7889                 print <$fd>;
7890                 close $fd
7891                         or print "Reading git-diff-tree failed\n";
7892         } elsif ($format eq 'patch') {
7893                 local $/ = undef;
7894                 print <$fd>;
7895                 close $fd
7896                         or print "Reading git-format-patch failed\n";
7897         }
7898 }
7899
7900 sub git_commitdiff_plain {
7901         git_commitdiff(-format => 'plain');
7902 }
7903
7904 # format-patch-style patches
7905 sub git_patch {
7906         git_commitdiff(-format => 'patch', -single => 1);
7907 }
7908
7909 sub git_patches {
7910         git_commitdiff(-format => 'patch');
7911 }
7912
7913 sub git_history {
7914         git_log_generic('history', \&git_history_body,
7915                         $hash_base, $hash_parent_base,
7916                         $file_name, $hash);
7917 }
7918
7919 sub git_search {
7920         $searchtype ||= 'commit';
7921
7922         # check if appropriate features are enabled
7923         gitweb_check_feature('search')
7924                 or die_error(403, "Search is disabled");
7925         if ($searchtype eq 'pickaxe') {
7926                 # pickaxe may take all resources of your box and run for several minutes
7927                 # with every query - so decide by yourself how public you make this feature
7928                 gitweb_check_feature('pickaxe')
7929                         or die_error(403, "Pickaxe search is disabled");
7930         }
7931         if ($searchtype eq 'grep') {
7932                 # grep search might be potentially CPU-intensive, too
7933                 gitweb_check_feature('grep')
7934                         or die_error(403, "Grep search is disabled");
7935         }
7936
7937         if (!defined $searchtext) {
7938                 die_error(400, "Text field is empty");
7939         }
7940         if (!defined $hash) {
7941                 $hash = git_get_head_hash($project);
7942         }
7943         my %co = parse_commit($hash);
7944         if (!%co) {
7945                 die_error(404, "Unknown commit object");
7946         }
7947         if (!defined $page) {
7948                 $page = 0;
7949         }
7950
7951         if ($searchtype eq 'commit' ||
7952             $searchtype eq 'author' ||
7953             $searchtype eq 'committer') {
7954                 git_search_message(%co);
7955         } elsif ($searchtype eq 'pickaxe') {
7956                 git_search_changes(%co);
7957         } elsif ($searchtype eq 'grep') {
7958                 git_search_files(%co);
7959         } else {
7960                 die_error(400, "Unknown search type");
7961         }
7962 }
7963
7964 sub git_search_help {
7965         git_header_html();
7966         git_print_page_nav('','', $hash,$hash,$hash);
7967         print <<EOT;
7968 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7969 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7970 the pattern entered is recognized as the POSIX extended
7971 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7972 insensitive).</p>
7973 <dl>
7974 <dt><b>commit</b></dt>
7975 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7976 EOT
7977         my $have_grep = gitweb_check_feature('grep');
7978         if ($have_grep) {
7979                 print <<EOT;
7980 <dt><b>grep</b></dt>
7981 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7982     a different one) are searched for the given pattern. On large trees, this search can take
7983 a while and put some strain on the server, so please use it with some consideration. Note that
7984 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7985 case-sensitive.</dd>
7986 EOT
7987         }
7988         print <<EOT;
7989 <dt><b>author</b></dt>
7990 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7991 <dt><b>committer</b></dt>
7992 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7993 EOT
7994         my $have_pickaxe = gitweb_check_feature('pickaxe');
7995         if ($have_pickaxe) {
7996                 print <<EOT;
7997 <dt><b>pickaxe</b></dt>
7998 <dd>All commits that caused the string to appear or disappear from any file (changes that
7999 added, removed or "modified" the string) will be listed. This search can take a while and
8000 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8001 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8002 EOT
8003         }
8004         print "</dl>\n";
8005         git_footer_html();
8006 }
8007
8008 sub git_shortlog {
8009         git_log_generic('shortlog', \&git_shortlog_body,
8010                         $hash, $hash_parent);
8011 }
8012
8013 ## ......................................................................
8014 ## feeds (RSS, Atom; OPML)
8015
8016 sub git_feed {
8017         my $format = shift || 'atom';
8018         my $have_blame = gitweb_check_feature('blame');
8019
8020         # Atom: http://www.atomenabled.org/developers/syndication/
8021         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8022         if ($format ne 'rss' && $format ne 'atom') {
8023                 die_error(400, "Unknown web feed format");
8024         }
8025
8026         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8027         my $head = $hash || 'HEAD';
8028         my @commitlist = parse_commits($head, 150, 0, $file_name);
8029
8030         my %latest_commit;
8031         my %latest_date;
8032         my $content_type = "application/$format+xml";
8033         if (defined $cgi->http('HTTP_ACCEPT') &&
8034                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8035                 # browser (feed reader) prefers text/xml
8036                 $content_type = 'text/xml';
8037         }
8038         if (defined($commitlist[0])) {
8039                 %latest_commit = %{$commitlist[0]};
8040                 my $latest_epoch = $latest_commit{'committer_epoch'};
8041                 exit_if_unmodified_since($latest_epoch);
8042                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8043         }
8044         print $cgi->header(
8045                 -type => $content_type,
8046                 -charset => 'utf-8',
8047                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8048                 -status => '200 OK');
8049
8050         # Optimization: skip generating the body if client asks only
8051         # for Last-Modified date.
8052         return if ($cgi->request_method() eq 'HEAD');
8053
8054         # header variables
8055         my $title = "$site_name - $project/$action";
8056         my $feed_type = 'log';
8057         if (defined $hash) {
8058                 $title .= " - '$hash'";
8059                 $feed_type = 'branch log';
8060                 if (defined $file_name) {
8061                         $title .= " :: $file_name";
8062                         $feed_type = 'history';
8063                 }
8064         } elsif (defined $file_name) {
8065                 $title .= " - $file_name";
8066                 $feed_type = 'history';
8067         }
8068         $title .= " $feed_type";
8069         my $descr = git_get_project_description($project);
8070         if (defined $descr) {
8071                 $descr = esc_html($descr);
8072         } else {
8073                 $descr = "$project " .
8074                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8075                          " feed";
8076         }
8077         my $owner = git_get_project_owner($project);
8078         $owner = esc_html($owner);
8079
8080         #header
8081         my $alt_url;
8082         if (defined $file_name) {
8083                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8084         } elsif (defined $hash) {
8085                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8086         } else {
8087                 $alt_url = href(-full=>1, action=>"summary");
8088         }
8089         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8090         if ($format eq 'rss') {
8091                 print <<XML;
8092 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8093 <channel>
8094 XML
8095                 print "<title>$title</title>\n" .
8096                       "<link>$alt_url</link>\n" .
8097                       "<description>$descr</description>\n" .
8098                       "<language>en</language>\n" .
8099                       # project owner is responsible for 'editorial' content
8100                       "<managingEditor>$owner</managingEditor>\n";
8101                 if (defined $logo || defined $favicon) {
8102                         # prefer the logo to the favicon, since RSS
8103                         # doesn't allow both
8104                         my $img = esc_url($logo || $favicon);
8105                         print "<image>\n" .
8106                               "<url>$img</url>\n" .
8107                               "<title>$title</title>\n" .
8108                               "<link>$alt_url</link>\n" .
8109                               "</image>\n";
8110                 }
8111                 if (%latest_date) {
8112                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8113                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8114                 }
8115                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8116         } elsif ($format eq 'atom') {
8117                 print <<XML;
8118 <feed xmlns="http://www.w3.org/2005/Atom">
8119 XML
8120                 print "<title>$title</title>\n" .
8121                       "<subtitle>$descr</subtitle>\n" .
8122                       '<link rel="alternate" type="text/html" href="' .
8123                       $alt_url . '" />' . "\n" .
8124                       '<link rel="self" type="' . $content_type . '" href="' .
8125                       $cgi->self_url() . '" />' . "\n" .
8126                       "<id>" . href(-full=>1) . "</id>\n" .
8127                       # use project owner for feed author
8128                       "<author><name>$owner</name></author>\n";
8129                 if (defined $favicon) {
8130                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8131                 }
8132                 if (defined $logo) {
8133                         # not twice as wide as tall: 72 x 27 pixels
8134                         print "<logo>" . esc_url($logo) . "</logo>\n";
8135                 }
8136                 if (! %latest_date) {
8137                         # dummy date to keep the feed valid until commits trickle in:
8138                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8139                 } else {
8140                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8141                 }
8142                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8143         }
8144
8145         # contents
8146         for (my $i = 0; $i <= $#commitlist; $i++) {
8147                 my %co = %{$commitlist[$i]};
8148                 my $commit = $co{'id'};
8149                 # we read 150, we always show 30 and the ones more recent than 48 hours
8150                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8151                         last;
8152                 }
8153                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8154
8155                 # get list of changed files
8156                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8157                         $co{'parent'} || "--root",
8158                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8159                         or next;
8160                 my @difftree = map { chomp; $_ } <$fd>;
8161                 close $fd
8162                         or next;
8163
8164                 # print element (entry, item)
8165                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8166                 if ($format eq 'rss') {
8167                         print "<item>\n" .
8168                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8169                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8170                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8171                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8172                               "<link>$co_url</link>\n" .
8173                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8174                               "<content:encoded>" .
8175                               "<![CDATA[\n";
8176                 } elsif ($format eq 'atom') {
8177                         print "<entry>\n" .
8178                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8179                               "<updated>$cd{'iso-8601'}</updated>\n" .
8180                               "<author>\n" .
8181                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8182                         if ($co{'author_email'}) {
8183                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8184                         }
8185                         print "</author>\n" .
8186                               # use committer for contributor
8187                               "<contributor>\n" .
8188                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8189                         if ($co{'committer_email'}) {
8190                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8191                         }
8192                         print "</contributor>\n" .
8193                               "<published>$cd{'iso-8601'}</published>\n" .
8194                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8195                               "<id>$co_url</id>\n" .
8196                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8197                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8198                 }
8199                 my $comment = $co{'comment'};
8200                 print "<pre>\n";
8201                 foreach my $line (@$comment) {
8202                         $line = esc_html($line);
8203                         print "$line\n";
8204                 }
8205                 print "</pre><ul>\n";
8206                 foreach my $difftree_line (@difftree) {
8207                         my %difftree = parse_difftree_raw_line($difftree_line);
8208                         next if !$difftree{'from_id'};
8209
8210                         my $file = $difftree{'file'} || $difftree{'to_file'};
8211
8212                         print "<li>" .
8213                               "[" .
8214                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8215                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8216                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8217                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8218                                       -title => "diff"}, 'D');
8219                         if ($have_blame) {
8220                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8221                                                              file_name=>$file, hash_base=>$commit),
8222                                               -title => "blame"}, 'B');
8223                         }
8224                         # if this is not a feed of a file history
8225                         if (!defined $file_name || $file_name ne $file) {
8226                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8227                                                              file_name=>$file, hash=>$commit),
8228                                               -title => "history"}, 'H');
8229                         }
8230                         $file = esc_path($file);
8231                         print "] ".
8232                               "$file</li>\n";
8233                 }
8234                 if ($format eq 'rss') {
8235                         print "</ul>]]>\n" .
8236                               "</content:encoded>\n" .
8237                               "</item>\n";
8238                 } elsif ($format eq 'atom') {
8239                         print "</ul>\n</div>\n" .
8240                               "</content>\n" .
8241                               "</entry>\n";
8242                 }
8243         }
8244
8245         # end of feed
8246         if ($format eq 'rss') {
8247                 print "</channel>\n</rss>\n";
8248         } elsif ($format eq 'atom') {
8249                 print "</feed>\n";
8250         }
8251 }
8252
8253 sub git_rss {
8254         git_feed('rss');
8255 }
8256
8257 sub git_atom {
8258         git_feed('atom');
8259 }
8260
8261 sub git_opml {
8262         my @list = git_get_projects_list($project_filter, $strict_export);
8263         if (!@list) {
8264                 die_error(404, "No projects found");
8265         }
8266
8267         print $cgi->header(
8268                 -type => 'text/xml',
8269                 -charset => 'utf-8',
8270                 -content_disposition => 'inline; filename="opml.xml"');
8271
8272         my $title = esc_html($site_name);
8273         my $filter = " within subdirectory ";
8274         if (defined $project_filter) {
8275                 $filter .= esc_html($project_filter);
8276         } else {
8277                 $filter = "";
8278         }
8279         print <<XML;
8280 <?xml version="1.0" encoding="utf-8"?>
8281 <opml version="1.0">
8282 <head>
8283   <title>$title OPML Export$filter</title>
8284 </head>
8285 <body>
8286 <outline text="git RSS feeds">
8287 XML
8288
8289         foreach my $pr (@list) {
8290                 my %proj = %$pr;
8291                 my $head = git_get_head_hash($proj{'path'});
8292                 if (!defined $head) {
8293                         next;
8294                 }
8295                 $git_dir = "$projectroot/$proj{'path'}";
8296                 my %co = parse_commit($head);
8297                 if (!%co) {
8298                         next;
8299                 }
8300
8301                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8302                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8303                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8304                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8305         }
8306         print <<XML;
8307 </outline>
8308 </body>
8309 </opml>
8310 XML
8311 }