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, $css_class, @sel) = @_;
1741         return esc_html($str) unless @sel;
1742
1743         my $out = '';
1744         my $pos = 0;
1745
1746         for my $s (@sel) {
1747                 $out .= esc_html(substr($str, $pos, $s->[0] - $pos))
1748                         if ($s->[0] - $pos > 0);
1749                 $out .= $cgi->span({-class => $css_class},
1750                                    esc_html(substr($str, $s->[0], $s->[1] - $s->[0])));
1751
1752                 $pos = $s->[1];
1753         }
1754         $out .= esc_html(substr($str, $pos))
1755                 if ($pos < length($str));
1756
1757         return $out;
1758 }
1759
1760 # return positions of beginning and end of each match
1761 sub matchpos_list {
1762         my ($str, $regexp) = @_;
1763         return unless (defined $str && defined $regexp);
1764
1765         my @matches;
1766         while ($str =~ /$regexp/g) {
1767                 push @matches, [$-[0], $+[0]];
1768         }
1769         return @matches;
1770 }
1771
1772 # highlight match (if any), and escape HTML
1773 sub esc_html_match_hl {
1774         my ($str, $regexp) = @_;
1775         return esc_html($str) unless defined $regexp;
1776
1777         my @matches = matchpos_list($str, $regexp);
1778         return esc_html($str) unless @matches;
1779
1780         return esc_html_hl_regions($str, 'match', @matches);
1781 }
1782
1783
1784 # highlight match (if any) of shortened string, and escape HTML
1785 sub esc_html_match_hl_chopped {
1786         my ($str, $chopped, $regexp) = @_;
1787         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1788
1789         my @matches = matchpos_list($str, $regexp);
1790         return esc_html($chopped) unless @matches;
1791
1792         # filter matches so that we mark chopped string
1793         my $tail = "... "; # see chop_str
1794         unless ($chopped =~ s/\Q$tail\E$//) {
1795                 $tail = '';
1796         }
1797         my $chop_len = length($chopped);
1798         my $tail_len = length($tail);
1799         my @filtered;
1800
1801         for my $m (@matches) {
1802                 if ($m->[0] > $chop_len) {
1803                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1804                         last;
1805                 } elsif ($m->[1] > $chop_len) {
1806                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1807                         last;
1808                 }
1809                 push @filtered, $m;
1810         }
1811
1812         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1813 }
1814
1815 ## ----------------------------------------------------------------------
1816 ## functions returning short strings
1817
1818 # CSS class for given age value (in seconds)
1819 sub age_class {
1820         my $age = shift;
1821
1822         if (!defined $age) {
1823                 return "noage";
1824         } elsif ($age < 60*60*2) {
1825                 return "age0";
1826         } elsif ($age < 60*60*24*2) {
1827                 return "age1";
1828         } else {
1829                 return "age2";
1830         }
1831 }
1832
1833 # convert age in seconds to "nn units ago" string
1834 sub age_string {
1835         my $age = shift;
1836         my $age_str;
1837
1838         if ($age > 60*60*24*365*2) {
1839                 $age_str = (int $age/60/60/24/365);
1840                 $age_str .= " years ago";
1841         } elsif ($age > 60*60*24*(365/12)*2) {
1842                 $age_str = int $age/60/60/24/(365/12);
1843                 $age_str .= " months ago";
1844         } elsif ($age > 60*60*24*7*2) {
1845                 $age_str = int $age/60/60/24/7;
1846                 $age_str .= " weeks ago";
1847         } elsif ($age > 60*60*24*2) {
1848                 $age_str = int $age/60/60/24;
1849                 $age_str .= " days ago";
1850         } elsif ($age > 60*60*2) {
1851                 $age_str = int $age/60/60;
1852                 $age_str .= " hours ago";
1853         } elsif ($age > 60*2) {
1854                 $age_str = int $age/60;
1855                 $age_str .= " min ago";
1856         } elsif ($age > 2) {
1857                 $age_str = int $age;
1858                 $age_str .= " sec ago";
1859         } else {
1860                 $age_str .= " right now";
1861         }
1862         return $age_str;
1863 }
1864
1865 use constant {
1866         S_IFINVALID => 0030000,
1867         S_IFGITLINK => 0160000,
1868 };
1869
1870 # submodule/subproject, a commit object reference
1871 sub S_ISGITLINK {
1872         my $mode = shift;
1873
1874         return (($mode & S_IFMT) == S_IFGITLINK)
1875 }
1876
1877 # convert file mode in octal to symbolic file mode string
1878 sub mode_str {
1879         my $mode = oct shift;
1880
1881         if (S_ISGITLINK($mode)) {
1882                 return 'm---------';
1883         } elsif (S_ISDIR($mode & S_IFMT)) {
1884                 return 'drwxr-xr-x';
1885         } elsif (S_ISLNK($mode)) {
1886                 return 'lrwxrwxrwx';
1887         } elsif (S_ISREG($mode)) {
1888                 # git cares only about the executable bit
1889                 if ($mode & S_IXUSR) {
1890                         return '-rwxr-xr-x';
1891                 } else {
1892                         return '-rw-r--r--';
1893                 };
1894         } else {
1895                 return '----------';
1896         }
1897 }
1898
1899 # convert file mode in octal to file type string
1900 sub file_type {
1901         my $mode = shift;
1902
1903         if ($mode !~ m/^[0-7]+$/) {
1904                 return $mode;
1905         } else {
1906                 $mode = oct $mode;
1907         }
1908
1909         if (S_ISGITLINK($mode)) {
1910                 return "submodule";
1911         } elsif (S_ISDIR($mode & S_IFMT)) {
1912                 return "directory";
1913         } elsif (S_ISLNK($mode)) {
1914                 return "symlink";
1915         } elsif (S_ISREG($mode)) {
1916                 return "file";
1917         } else {
1918                 return "unknown";
1919         }
1920 }
1921
1922 # convert file mode in octal to file type description string
1923 sub file_type_long {
1924         my $mode = shift;
1925
1926         if ($mode !~ m/^[0-7]+$/) {
1927                 return $mode;
1928         } else {
1929                 $mode = oct $mode;
1930         }
1931
1932         if (S_ISGITLINK($mode)) {
1933                 return "submodule";
1934         } elsif (S_ISDIR($mode & S_IFMT)) {
1935                 return "directory";
1936         } elsif (S_ISLNK($mode)) {
1937                 return "symlink";
1938         } elsif (S_ISREG($mode)) {
1939                 if ($mode & S_IXUSR) {
1940                         return "executable";
1941                 } else {
1942                         return "file";
1943                 };
1944         } else {
1945                 return "unknown";
1946         }
1947 }
1948
1949
1950 ## ----------------------------------------------------------------------
1951 ## functions returning short HTML fragments, or transforming HTML fragments
1952 ## which don't belong to other sections
1953
1954 # format line of commit message.
1955 sub format_log_line_html {
1956         my $line = shift;
1957
1958         $line = esc_html($line, -nbsp=>1);
1959         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1960                 $cgi->a({-href => href(action=>"object", hash=>$1),
1961                                         -class => "text"}, $1);
1962         }eg;
1963
1964         return $line;
1965 }
1966
1967 # format marker of refs pointing to given object
1968
1969 # the destination action is chosen based on object type and current context:
1970 # - for annotated tags, we choose the tag view unless it's the current view
1971 #   already, in which case we go to shortlog view
1972 # - for other refs, we keep the current view if we're in history, shortlog or
1973 #   log view, and select shortlog otherwise
1974 sub format_ref_marker {
1975         my ($refs, $id) = @_;
1976         my $markers = '';
1977
1978         if (defined $refs->{$id}) {
1979                 foreach my $ref (@{$refs->{$id}}) {
1980                         # this code exploits the fact that non-lightweight tags are the
1981                         # only indirect objects, and that they are the only objects for which
1982                         # we want to use tag instead of shortlog as action
1983                         my ($type, $name) = qw();
1984                         my $indirect = ($ref =~ s/\^\{\}$//);
1985                         # e.g. tags/v2.6.11 or heads/next
1986                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1987                                 $type = $1;
1988                                 $name = $2;
1989                         } else {
1990                                 $type = "ref";
1991                                 $name = $ref;
1992                         }
1993
1994                         my $class = $type;
1995                         $class .= " indirect" if $indirect;
1996
1997                         my $dest_action = "shortlog";
1998
1999                         if ($indirect) {
2000                                 $dest_action = "tag" unless $action eq "tag";
2001                         } elsif ($action =~ /^(history|(short)?log)$/) {
2002                                 $dest_action = $action;
2003                         }
2004
2005                         my $dest = "";
2006                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2007                         $dest .= $ref;
2008
2009                         my $link = $cgi->a({
2010                                 -href => href(
2011                                         action=>$dest_action,
2012                                         hash=>$dest
2013                                 )}, $name);
2014
2015                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2016                                 $link . "</span>";
2017                 }
2018         }
2019
2020         if ($markers) {
2021                 return ' <span class="refs">'. $markers . '</span>';
2022         } else {
2023                 return "";
2024         }
2025 }
2026
2027 # format, perhaps shortened and with markers, title line
2028 sub format_subject_html {
2029         my ($long, $short, $href, $extra) = @_;
2030         $extra = '' unless defined($extra);
2031
2032         if (length($short) < length($long)) {
2033                 $long =~ s/[[:cntrl:]]/?/g;
2034                 return $cgi->a({-href => $href, -class => "list subject",
2035                                 -title => to_utf8($long)},
2036                        esc_html($short)) . $extra;
2037         } else {
2038                 return $cgi->a({-href => $href, -class => "list subject"},
2039                        esc_html($long)) . $extra;
2040         }
2041 }
2042
2043 # Rather than recomputing the url for an email multiple times, we cache it
2044 # after the first hit. This gives a visible benefit in views where the avatar
2045 # for the same email is used repeatedly (e.g. shortlog).
2046 # The cache is shared by all avatar engines (currently gravatar only), which
2047 # are free to use it as preferred. Since only one avatar engine is used for any
2048 # given page, there's no risk for cache conflicts.
2049 our %avatar_cache = ();
2050
2051 # Compute the picon url for a given email, by using the picon search service over at
2052 # http://www.cs.indiana.edu/picons/search.html
2053 sub picon_url {
2054         my $email = lc shift;
2055         if (!$avatar_cache{$email}) {
2056                 my ($user, $domain) = split('@', $email);
2057                 $avatar_cache{$email} =
2058                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2059                         "$domain/$user/" .
2060                         "users+domains+unknown/up/single";
2061         }
2062         return $avatar_cache{$email};
2063 }
2064
2065 # Compute the gravatar url for a given email, if it's not in the cache already.
2066 # Gravatar stores only the part of the URL before the size, since that's the
2067 # one computationally more expensive. This also allows reuse of the cache for
2068 # different sizes (for this particular engine).
2069 sub gravatar_url {
2070         my $email = lc shift;
2071         my $size = shift;
2072         $avatar_cache{$email} ||=
2073                 "http://www.gravatar.com/avatar/" .
2074                         Digest::MD5::md5_hex($email) . "?s=";
2075         return $avatar_cache{$email} . $size;
2076 }
2077
2078 # Insert an avatar for the given $email at the given $size if the feature
2079 # is enabled.
2080 sub git_get_avatar {
2081         my ($email, %opts) = @_;
2082         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2083         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2084         $opts{-size} ||= 'default';
2085         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2086         my $url = "";
2087         if ($git_avatar eq 'gravatar') {
2088                 $url = gravatar_url($email, $size);
2089         } elsif ($git_avatar eq 'picon') {
2090                 $url = picon_url($email);
2091         }
2092         # Other providers can be added by extending the if chain, defining $url
2093         # as needed. If no variant puts something in $url, we assume avatars
2094         # are completely disabled/unavailable.
2095         if ($url) {
2096                 return $pre_white .
2097                        "<img width=\"$size\" " .
2098                             "class=\"avatar\" " .
2099                             "src=\"".esc_url($url)."\" " .
2100                             "alt=\"\" " .
2101                        "/>" . $post_white;
2102         } else {
2103                 return "";
2104         }
2105 }
2106
2107 sub format_search_author {
2108         my ($author, $searchtype, $displaytext) = @_;
2109         my $have_search = gitweb_check_feature('search');
2110
2111         if ($have_search) {
2112                 my $performed = "";
2113                 if ($searchtype eq 'author') {
2114                         $performed = "authored";
2115                 } elsif ($searchtype eq 'committer') {
2116                         $performed = "committed";
2117                 }
2118
2119                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2120                                 searchtext=>$author,
2121                                 searchtype=>$searchtype), class=>"list",
2122                                 title=>"Search for commits $performed by $author"},
2123                                 $displaytext);
2124
2125         } else {
2126                 return $displaytext;
2127         }
2128 }
2129
2130 # format the author name of the given commit with the given tag
2131 # the author name is chopped and escaped according to the other
2132 # optional parameters (see chop_str).
2133 sub format_author_html {
2134         my $tag = shift;
2135         my $co = shift;
2136         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2137         return "<$tag class=\"author\">" .
2138                format_search_author($co->{'author_name'}, "author",
2139                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2140                        $author) .
2141                "</$tag>";
2142 }
2143
2144 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2145 sub format_git_diff_header_line {
2146         my $line = shift;
2147         my $diffinfo = shift;
2148         my ($from, $to) = @_;
2149
2150         if ($diffinfo->{'nparents'}) {
2151                 # combined diff
2152                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2153                 if ($to->{'href'}) {
2154                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2155                                          esc_path($to->{'file'}));
2156                 } else { # file was deleted (no href)
2157                         $line .= esc_path($to->{'file'});
2158                 }
2159         } else {
2160                 # "ordinary" diff
2161                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2162                 if ($from->{'href'}) {
2163                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2164                                          'a/' . esc_path($from->{'file'}));
2165                 } else { # file was added (no href)
2166                         $line .= 'a/' . esc_path($from->{'file'});
2167                 }
2168                 $line .= ' ';
2169                 if ($to->{'href'}) {
2170                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2171                                          'b/' . esc_path($to->{'file'}));
2172                 } else { # file was deleted
2173                         $line .= 'b/' . esc_path($to->{'file'});
2174                 }
2175         }
2176
2177         return "<div class=\"diff header\">$line</div>\n";
2178 }
2179
2180 # format extended diff header line, before patch itself
2181 sub format_extended_diff_header_line {
2182         my $line = shift;
2183         my $diffinfo = shift;
2184         my ($from, $to) = @_;
2185
2186         # match <path>
2187         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2188                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2189                                        esc_path($from->{'file'}));
2190         }
2191         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2192                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2193                                  esc_path($to->{'file'}));
2194         }
2195         # match single <mode>
2196         if ($line =~ m/\s(\d{6})$/) {
2197                 $line .= '<span class="info"> (' .
2198                          file_type_long($1) .
2199                          ')</span>';
2200         }
2201         # match <hash>
2202         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2203                 # can match only for combined diff
2204                 $line = 'index ';
2205                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2206                         if ($from->{'href'}[$i]) {
2207                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2208                                                   -class=>"hash"},
2209                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2210                         } else {
2211                                 $line .= '0' x 7;
2212                         }
2213                         # separator
2214                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2215                 }
2216                 $line .= '..';
2217                 if ($to->{'href'}) {
2218                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2219                                          substr($diffinfo->{'to_id'},0,7));
2220                 } else {
2221                         $line .= '0' x 7;
2222                 }
2223
2224         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2225                 # can match only for ordinary diff
2226                 my ($from_link, $to_link);
2227                 if ($from->{'href'}) {
2228                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2229                                              substr($diffinfo->{'from_id'},0,7));
2230                 } else {
2231                         $from_link = '0' x 7;
2232                 }
2233                 if ($to->{'href'}) {
2234                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2235                                            substr($diffinfo->{'to_id'},0,7));
2236                 } else {
2237                         $to_link = '0' x 7;
2238                 }
2239                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2240                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2241         }
2242
2243         return $line . "<br/>\n";
2244 }
2245
2246 # format from-file/to-file diff header
2247 sub format_diff_from_to_header {
2248         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2249         my $line;
2250         my $result = '';
2251
2252         $line = $from_line;
2253         #assert($line =~ m/^---/) if DEBUG;
2254         # no extra formatting for "^--- /dev/null"
2255         if (! $diffinfo->{'nparents'}) {
2256                 # ordinary (single parent) diff
2257                 if ($line =~ m!^--- "?a/!) {
2258                         if ($from->{'href'}) {
2259                                 $line = '--- a/' .
2260                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2261                                                 esc_path($from->{'file'}));
2262                         } else {
2263                                 $line = '--- a/' .
2264                                         esc_path($from->{'file'});
2265                         }
2266                 }
2267                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2268
2269         } else {
2270                 # combined diff (merge commit)
2271                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2272                         if ($from->{'href'}[$i]) {
2273                                 $line = '--- ' .
2274                                         $cgi->a({-href=>href(action=>"blobdiff",
2275                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2276                                                              hash_parent_base=>$parents[$i],
2277                                                              file_parent=>$from->{'file'}[$i],
2278                                                              hash=>$diffinfo->{'to_id'},
2279                                                              hash_base=>$hash,
2280                                                              file_name=>$to->{'file'}),
2281                                                  -class=>"path",
2282                                                  -title=>"diff" . ($i+1)},
2283                                                 $i+1) .
2284                                         '/' .
2285                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2286                                                 esc_path($from->{'file'}[$i]));
2287                         } else {
2288                                 $line = '--- /dev/null';
2289                         }
2290                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2291                 }
2292         }
2293
2294         $line = $to_line;
2295         #assert($line =~ m/^\+\+\+/) if DEBUG;
2296         # no extra formatting for "^+++ /dev/null"
2297         if ($line =~ m!^\+\+\+ "?b/!) {
2298                 if ($to->{'href'}) {
2299                         $line = '+++ b/' .
2300                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2301                                         esc_path($to->{'file'}));
2302                 } else {
2303                         $line = '+++ b/' .
2304                                 esc_path($to->{'file'});
2305                 }
2306         }
2307         $result .= qq!<div class="diff to_file">$line</div>\n!;
2308
2309         return $result;
2310 }
2311
2312 # create note for patch simplified by combined diff
2313 sub format_diff_cc_simplified {
2314         my ($diffinfo, @parents) = @_;
2315         my $result = '';
2316
2317         $result .= "<div class=\"diff header\">" .
2318                    "diff --cc ";
2319         if (!is_deleted($diffinfo)) {
2320                 $result .= $cgi->a({-href => href(action=>"blob",
2321                                                   hash_base=>$hash,
2322                                                   hash=>$diffinfo->{'to_id'},
2323                                                   file_name=>$diffinfo->{'to_file'}),
2324                                     -class => "path"},
2325                                    esc_path($diffinfo->{'to_file'}));
2326         } else {
2327                 $result .= esc_path($diffinfo->{'to_file'});
2328         }
2329         $result .= "</div>\n" . # class="diff header"
2330                    "<div class=\"diff nodifferences\">" .
2331                    "Simple merge" .
2332                    "</div>\n"; # class="diff nodifferences"
2333
2334         return $result;
2335 }
2336
2337 sub diff_line_class {
2338         my ($line, $from, $to) = @_;
2339
2340         # ordinary diff
2341         my $num_sign = 1;
2342         # combined diff
2343         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2344                 $num_sign = scalar @{$from->{'href'}};
2345         }
2346
2347         my @diff_line_classifier = (
2348                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2349                 { regexp => qr/^\\/,               class => "incomplete"  },
2350                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2351                 # classifier for context must come before classifier add/rem,
2352                 # or we would have to use more complicated regexp, for example
2353                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2354                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2355                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2356         );
2357         for my $clsfy (@diff_line_classifier) {
2358                 return $clsfy->{'class'}
2359                         if ($line =~ $clsfy->{'regexp'});
2360         }
2361
2362         # fallback
2363         return "";
2364 }
2365
2366 # assumes that $from and $to are defined and correctly filled,
2367 # and that $line holds a line of chunk header for unified diff
2368 sub format_unidiff_chunk_header {
2369         my ($line, $from, $to) = @_;
2370
2371         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2372                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2373
2374         $from_lines = 0 unless defined $from_lines;
2375         $to_lines   = 0 unless defined $to_lines;
2376
2377         if ($from->{'href'}) {
2378                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2379                                      -class=>"list"}, $from_text);
2380         }
2381         if ($to->{'href'}) {
2382                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2383                                      -class=>"list"}, $to_text);
2384         }
2385         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2386                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2387         return $line;
2388 }
2389
2390 # assumes that $from and $to are defined and correctly filled,
2391 # and that $line holds a line of chunk header for combined diff
2392 sub format_cc_diff_chunk_header {
2393         my ($line, $from, $to) = @_;
2394
2395         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2396         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2397
2398         @from_text = split(' ', $ranges);
2399         for (my $i = 0; $i < @from_text; ++$i) {
2400                 ($from_start[$i], $from_nlines[$i]) =
2401                         (split(',', substr($from_text[$i], 1)), 0);
2402         }
2403
2404         $to_text   = pop @from_text;
2405         $to_start  = pop @from_start;
2406         $to_nlines = pop @from_nlines;
2407
2408         $line = "<span class=\"chunk_info\">$prefix ";
2409         for (my $i = 0; $i < @from_text; ++$i) {
2410                 if ($from->{'href'}[$i]) {
2411                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2412                                           -class=>"list"}, $from_text[$i]);
2413                 } else {
2414                         $line .= $from_text[$i];
2415                 }
2416                 $line .= " ";
2417         }
2418         if ($to->{'href'}) {
2419                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2420                                   -class=>"list"}, $to_text);
2421         } else {
2422                 $line .= $to_text;
2423         }
2424         $line .= " $prefix</span>" .
2425                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2426         return $line;
2427 }
2428
2429 # process patch (diff) line (not to be used for diff headers),
2430 # returning class and HTML-formatted (but not wrapped) line
2431 sub process_diff_line {
2432         my $line = shift;
2433         my ($from, $to) = @_;
2434
2435         my $diff_class = diff_line_class($line, $from, $to);
2436
2437         chomp $line;
2438         $line = untabify($line);
2439
2440         if ($from && $to && $line =~ m/^\@{2} /) {
2441                 $line = format_unidiff_chunk_header($line, $from, $to);
2442                 return $diff_class, $line;
2443
2444         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2445                 $line = format_cc_diff_chunk_header($line, $from, $to);
2446                 return $diff_class, $line;
2447
2448         }
2449         return $diff_class, esc_html($line, -nbsp=>1);
2450 }
2451
2452 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2453 # linked.  Pass the hash of the tree/commit to snapshot.
2454 sub format_snapshot_links {
2455         my ($hash) = @_;
2456         my $num_fmts = @snapshot_fmts;
2457         if ($num_fmts > 1) {
2458                 # A parenthesized list of links bearing format names.
2459                 # e.g. "snapshot (_tar.gz_ _zip_)"
2460                 return "snapshot (" . join(' ', map
2461                         $cgi->a({
2462                                 -href => href(
2463                                         action=>"snapshot",
2464                                         hash=>$hash,
2465                                         snapshot_format=>$_
2466                                 )
2467                         }, $known_snapshot_formats{$_}{'display'})
2468                 , @snapshot_fmts) . ")";
2469         } elsif ($num_fmts == 1) {
2470                 # A single "snapshot" link whose tooltip bears the format name.
2471                 # i.e. "_snapshot_"
2472                 my ($fmt) = @snapshot_fmts;
2473                 return
2474                         $cgi->a({
2475                                 -href => href(
2476                                         action=>"snapshot",
2477                                         hash=>$hash,
2478                                         snapshot_format=>$fmt
2479                                 ),
2480                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2481                         }, "snapshot");
2482         } else { # $num_fmts == 0
2483                 return undef;
2484         }
2485 }
2486
2487 ## ......................................................................
2488 ## functions returning values to be passed, perhaps after some
2489 ## transformation, to other functions; e.g. returning arguments to href()
2490
2491 # returns hash to be passed to href to generate gitweb URL
2492 # in -title key it returns description of link
2493 sub get_feed_info {
2494         my $format = shift || 'Atom';
2495         my %res = (action => lc($format));
2496
2497         # feed links are possible only for project views
2498         return unless (defined $project);
2499         # some views should link to OPML, or to generic project feed,
2500         # or don't have specific feed yet (so they should use generic)
2501         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2502
2503         my $branch;
2504         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2505         # from tag links; this also makes possible to detect branch links
2506         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2507             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2508                 $branch = $1;
2509         }
2510         # find log type for feed description (title)
2511         my $type = 'log';
2512         if (defined $file_name) {
2513                 $type  = "history of $file_name";
2514                 $type .= "/" if ($action eq 'tree');
2515                 $type .= " on '$branch'" if (defined $branch);
2516         } else {
2517                 $type = "log of $branch" if (defined $branch);
2518         }
2519
2520         $res{-title} = $type;
2521         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2522         $res{'file_name'} = $file_name;
2523
2524         return %res;
2525 }
2526
2527 ## ----------------------------------------------------------------------
2528 ## git utility subroutines, invoking git commands
2529
2530 # returns path to the core git executable and the --git-dir parameter as list
2531 sub git_cmd {
2532         $number_of_git_cmds++;
2533         return $GIT, '--git-dir='.$git_dir;
2534 }
2535
2536 # quote the given arguments for passing them to the shell
2537 # quote_command("command", "arg 1", "arg with ' and ! characters")
2538 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2539 # Try to avoid using this function wherever possible.
2540 sub quote_command {
2541         return join(' ',
2542                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2543 }
2544
2545 # get HEAD ref of given project as hash
2546 sub git_get_head_hash {
2547         return git_get_full_hash(shift, 'HEAD');
2548 }
2549
2550 sub git_get_full_hash {
2551         return git_get_hash(@_);
2552 }
2553
2554 sub git_get_short_hash {
2555         return git_get_hash(@_, '--short=7');
2556 }
2557
2558 sub git_get_hash {
2559         my ($project, $hash, @options) = @_;
2560         my $o_git_dir = $git_dir;
2561         my $retval = undef;
2562         $git_dir = "$projectroot/$project";
2563         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2564             '--verify', '-q', @options, $hash) {
2565                 $retval = <$fd>;
2566                 chomp $retval if defined $retval;
2567                 close $fd;
2568         }
2569         if (defined $o_git_dir) {
2570                 $git_dir = $o_git_dir;
2571         }
2572         return $retval;
2573 }
2574
2575 # get type of given object
2576 sub git_get_type {
2577         my $hash = shift;
2578
2579         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2580         my $type = <$fd>;
2581         close $fd or return;
2582         chomp $type;
2583         return $type;
2584 }
2585
2586 # repository configuration
2587 our $config_file = '';
2588 our %config;
2589
2590 # store multiple values for single key as anonymous array reference
2591 # single values stored directly in the hash, not as [ <value> ]
2592 sub hash_set_multi {
2593         my ($hash, $key, $value) = @_;
2594
2595         if (!exists $hash->{$key}) {
2596                 $hash->{$key} = $value;
2597         } elsif (!ref $hash->{$key}) {
2598                 $hash->{$key} = [ $hash->{$key}, $value ];
2599         } else {
2600                 push @{$hash->{$key}}, $value;
2601         }
2602 }
2603
2604 # return hash of git project configuration
2605 # optionally limited to some section, e.g. 'gitweb'
2606 sub git_parse_project_config {
2607         my $section_regexp = shift;
2608         my %config;
2609
2610         local $/ = "\0";
2611
2612         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2613                 or return;
2614
2615         while (my $keyval = <$fh>) {
2616                 chomp $keyval;
2617                 my ($key, $value) = split(/\n/, $keyval, 2);
2618
2619                 hash_set_multi(\%config, $key, $value)
2620                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2621         }
2622         close $fh;
2623
2624         return %config;
2625 }
2626
2627 # convert config value to boolean: 'true' or 'false'
2628 # no value, number > 0, 'true' and 'yes' values are true
2629 # rest of values are treated as false (never as error)
2630 sub config_to_bool {
2631         my $val = shift;
2632
2633         return 1 if !defined $val;             # section.key
2634
2635         # strip leading and trailing whitespace
2636         $val =~ s/^\s+//;
2637         $val =~ s/\s+$//;
2638
2639         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2640                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2641 }
2642
2643 # convert config value to simple decimal number
2644 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2645 # to be multiplied by 1024, 1048576, or 1073741824
2646 sub config_to_int {
2647         my $val = shift;
2648
2649         # strip leading and trailing whitespace
2650         $val =~ s/^\s+//;
2651         $val =~ s/\s+$//;
2652
2653         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2654                 $unit = lc($unit);
2655                 # unknown unit is treated as 1
2656                 return $num * ($unit eq 'g' ? 1073741824 :
2657                                $unit eq 'm' ?    1048576 :
2658                                $unit eq 'k' ?       1024 : 1);
2659         }
2660         return $val;
2661 }
2662
2663 # convert config value to array reference, if needed
2664 sub config_to_multi {
2665         my $val = shift;
2666
2667         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2668 }
2669
2670 sub git_get_project_config {
2671         my ($key, $type) = @_;
2672
2673         return unless defined $git_dir;
2674
2675         # key sanity check
2676         return unless ($key);
2677         # only subsection, if exists, is case sensitive,
2678         # and not lowercased by 'git config -z -l'
2679         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2680                 $key = join(".", lc($hi), $mi, lc($lo));
2681         } else {
2682                 $key = lc($key);
2683         }
2684         $key =~ s/^gitweb\.//;
2685         return if ($key =~ m/\W/);
2686
2687         # type sanity check
2688         if (defined $type) {
2689                 $type =~ s/^--//;
2690                 $type = undef
2691                         unless ($type eq 'bool' || $type eq 'int');
2692         }
2693
2694         # get config
2695         if (!defined $config_file ||
2696             $config_file ne "$git_dir/config") {
2697                 %config = git_parse_project_config('gitweb');
2698                 $config_file = "$git_dir/config";
2699         }
2700
2701         # check if config variable (key) exists
2702         return unless exists $config{"gitweb.$key"};
2703
2704         # ensure given type
2705         if (!defined $type) {
2706                 return $config{"gitweb.$key"};
2707         } elsif ($type eq 'bool') {
2708                 # backward compatibility: 'git config --bool' returns true/false
2709                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2710         } elsif ($type eq 'int') {
2711                 return config_to_int($config{"gitweb.$key"});
2712         }
2713         return $config{"gitweb.$key"};
2714 }
2715
2716 # get hash of given path at given ref
2717 sub git_get_hash_by_path {
2718         my $base = shift;
2719         my $path = shift || return undef;
2720         my $type = shift;
2721
2722         $path =~ s,/+$,,;
2723
2724         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2725                 or die_error(500, "Open git-ls-tree failed");
2726         my $line = <$fd>;
2727         close $fd or return undef;
2728
2729         if (!defined $line) {
2730                 # there is no tree or hash given by $path at $base
2731                 return undef;
2732         }
2733
2734         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2735         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2736         if (defined $type && $type ne $2) {
2737                 # type doesn't match
2738                 return undef;
2739         }
2740         return $3;
2741 }
2742
2743 # get path of entry with given hash at given tree-ish (ref)
2744 # used to get 'from' filename for combined diff (merge commit) for renames
2745 sub git_get_path_by_hash {
2746         my $base = shift || return;
2747         my $hash = shift || return;
2748
2749         local $/ = "\0";
2750
2751         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2752                 or return undef;
2753         while (my $line = <$fd>) {
2754                 chomp $line;
2755
2756                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2757                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2758                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2759                         close $fd;
2760                         return $1;
2761                 }
2762         }
2763         close $fd;
2764         return undef;
2765 }
2766
2767 ## ......................................................................
2768 ## git utility functions, directly accessing git repository
2769
2770 # get the value of config variable either from file named as the variable
2771 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2772 # configuration variable in the repository config file.
2773 sub git_get_file_or_project_config {
2774         my ($path, $name) = @_;
2775
2776         $git_dir = "$projectroot/$path";
2777         open my $fd, '<', "$git_dir/$name"
2778                 or return git_get_project_config($name);
2779         my $conf = <$fd>;
2780         close $fd;
2781         if (defined $conf) {
2782                 chomp $conf;
2783         }
2784         return $conf;
2785 }
2786
2787 sub git_get_project_description {
2788         my $path = shift;
2789         return git_get_file_or_project_config($path, 'description');
2790 }
2791
2792 sub git_get_project_category {
2793         my $path = shift;
2794         return git_get_file_or_project_config($path, 'category');
2795 }
2796
2797
2798 # supported formats:
2799 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2800 #   - if its contents is a number, use it as tag weight,
2801 #   - otherwise add a tag with weight 1
2802 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2803 #   the same value multiple times increases tag weight
2804 # * `gitweb.ctag' multi-valued repo config variable
2805 sub git_get_project_ctags {
2806         my $project = shift;
2807         my $ctags = {};
2808
2809         $git_dir = "$projectroot/$project";
2810         if (opendir my $dh, "$git_dir/ctags") {
2811                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2812                 foreach my $tagfile (@files) {
2813                         open my $ct, '<', $tagfile
2814                                 or next;
2815                         my $val = <$ct>;
2816                         chomp $val if $val;
2817                         close $ct;
2818
2819                         (my $ctag = $tagfile) =~ s#.*/##;
2820                         if ($val =~ /^\d+$/) {
2821                                 $ctags->{$ctag} = $val;
2822                         } else {
2823                                 $ctags->{$ctag} = 1;
2824                         }
2825                 }
2826                 closedir $dh;
2827
2828         } elsif (open my $fh, '<', "$git_dir/ctags") {
2829                 while (my $line = <$fh>) {
2830                         chomp $line;
2831                         $ctags->{$line}++ if $line;
2832                 }
2833                 close $fh;
2834
2835         } else {
2836                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2837                 foreach my $tag (@$taglist) {
2838                         $ctags->{$tag}++;
2839                 }
2840         }
2841
2842         return $ctags;
2843 }
2844
2845 # return hash, where keys are content tags ('ctags'),
2846 # and values are sum of weights of given tag in every project
2847 sub git_gather_all_ctags {
2848         my $projects = shift;
2849         my $ctags = {};
2850
2851         foreach my $p (@$projects) {
2852                 foreach my $ct (keys %{$p->{'ctags'}}) {
2853                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2854                 }
2855         }
2856
2857         return $ctags;
2858 }
2859
2860 sub git_populate_project_tagcloud {
2861         my $ctags = shift;
2862
2863         # First, merge different-cased tags; tags vote on casing
2864         my %ctags_lc;
2865         foreach (keys %$ctags) {
2866                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2867                 if (not $ctags_lc{lc $_}->{topcount}
2868                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2869                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2870                         $ctags_lc{lc $_}->{topname} = $_;
2871                 }
2872         }
2873
2874         my $cloud;
2875         my $matched = $input_params{'ctag'};
2876         if (eval { require HTML::TagCloud; 1; }) {
2877                 $cloud = HTML::TagCloud->new;
2878                 foreach my $ctag (sort keys %ctags_lc) {
2879                         # Pad the title with spaces so that the cloud looks
2880                         # less crammed.
2881                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2882                         $title =~ s/ /&nbsp;/g;
2883                         $title =~ s/^/&nbsp;/g;
2884                         $title =~ s/$/&nbsp;/g;
2885                         if (defined $matched && $matched eq $ctag) {
2886                                 $title = qq(<span class="match">$title</span>);
2887                         }
2888                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2889                                     $ctags_lc{$ctag}->{count});
2890                 }
2891         } else {
2892                 $cloud = {};
2893                 foreach my $ctag (keys %ctags_lc) {
2894                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2895                         if (defined $matched && $matched eq $ctag) {
2896                                 $title = qq(<span class="match">$title</span>);
2897                         }
2898                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2899                         $cloud->{$ctag}{ctag} =
2900                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2901                 }
2902         }
2903         return $cloud;
2904 }
2905
2906 sub git_show_project_tagcloud {
2907         my ($cloud, $count) = @_;
2908         if (ref $cloud eq 'HTML::TagCloud') {
2909                 return $cloud->html_and_css($count);
2910         } else {
2911                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2912                 return
2913                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2914                         join (', ', map {
2915                                 $cloud->{$_}->{'ctag'}
2916                         } splice(@tags, 0, $count)) .
2917                         '</div>';
2918         }
2919 }
2920
2921 sub git_get_project_url_list {
2922         my $path = shift;
2923
2924         $git_dir = "$projectroot/$path";
2925         open my $fd, '<', "$git_dir/cloneurl"
2926                 or return wantarray ?
2927                 @{ config_to_multi(git_get_project_config('url')) } :
2928                    config_to_multi(git_get_project_config('url'));
2929         my @git_project_url_list = map { chomp; $_ } <$fd>;
2930         close $fd;
2931
2932         return wantarray ? @git_project_url_list : \@git_project_url_list;
2933 }
2934
2935 sub git_get_projects_list {
2936         my $filter = shift || '';
2937         my $paranoid = shift;
2938         my @list;
2939
2940         if (-d $projects_list) {
2941                 # search in directory
2942                 my $dir = $projects_list;
2943                 # remove the trailing "/"
2944                 $dir =~ s!/+$!!;
2945                 my $pfxlen = length("$dir");
2946                 my $pfxdepth = ($dir =~ tr!/!!);
2947                 # when filtering, search only given subdirectory
2948                 if ($filter && !$paranoid) {
2949                         $dir .= "/$filter";
2950                         $dir =~ s!/+$!!;
2951                 }
2952
2953                 File::Find::find({
2954                         follow_fast => 1, # follow symbolic links
2955                         follow_skip => 2, # ignore duplicates
2956                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2957                         wanted => sub {
2958                                 # global variables
2959                                 our $project_maxdepth;
2960                                 our $projectroot;
2961                                 # skip project-list toplevel, if we get it.
2962                                 return if (m!^[/.]$!);
2963                                 # only directories can be git repositories
2964                                 return unless (-d $_);
2965                                 # don't traverse too deep (Find is super slow on os x)
2966                                 # $project_maxdepth excludes depth of $projectroot
2967                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2968                                         $File::Find::prune = 1;
2969                                         return;
2970                                 }
2971
2972                                 my $path = substr($File::Find::name, $pfxlen + 1);
2973                                 # paranoidly only filter here
2974                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2975                                         next;
2976                                 }
2977                                 # we check related file in $projectroot
2978                                 if (check_export_ok("$projectroot/$path")) {
2979                                         push @list, { path => $path };
2980                                         $File::Find::prune = 1;
2981                                 }
2982                         },
2983                 }, "$dir");
2984
2985         } elsif (-f $projects_list) {
2986                 # read from file(url-encoded):
2987                 # 'git%2Fgit.git Linus+Torvalds'
2988                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2989                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2990                 open my $fd, '<', $projects_list or return;
2991         PROJECT:
2992                 while (my $line = <$fd>) {
2993                         chomp $line;
2994                         my ($path, $owner) = split ' ', $line;
2995                         $path = unescape($path);
2996                         $owner = unescape($owner);
2997                         if (!defined $path) {
2998                                 next;
2999                         }
3000                         # if $filter is rpovided, check if $path begins with $filter
3001                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3002                                 next;
3003                         }
3004                         if (check_export_ok("$projectroot/$path")) {
3005                                 my $pr = {
3006                                         path => $path
3007                                 };
3008                                 if ($owner) {
3009                                         $pr->{'owner'} = to_utf8($owner);
3010                                 }
3011                                 push @list, $pr;
3012                         }
3013                 }
3014                 close $fd;
3015         }
3016         return @list;
3017 }
3018
3019 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3020 # as side effects it sets 'forks' field to list of forks for forked projects
3021 sub filter_forks_from_projects_list {
3022         my $projects = shift;
3023
3024         my %trie; # prefix tree of directories (path components)
3025         # generate trie out of those directories that might contain forks
3026         foreach my $pr (@$projects) {
3027                 my $path = $pr->{'path'};
3028                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3029                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3030                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3031                 next unless (-d "$projectroot/$path"); # containing directory exists
3032                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3033
3034                 # add to trie
3035                 my @dirs = split('/', $path);
3036                 # walk the trie, until either runs out of components or out of trie
3037                 my $ref = \%trie;
3038                 while (scalar @dirs &&
3039                        exists($ref->{$dirs[0]})) {
3040                         $ref = $ref->{shift @dirs};
3041                 }
3042                 # create rest of trie structure from rest of components
3043                 foreach my $dir (@dirs) {
3044                         $ref = $ref->{$dir} = {};
3045                 }
3046                 # create end marker, store $pr as a data
3047                 $ref->{''} = $pr if (!exists $ref->{''});
3048         }
3049
3050         # filter out forks, by finding shortest prefix match for paths
3051         my @filtered;
3052  PROJECT:
3053         foreach my $pr (@$projects) {
3054                 # trie lookup
3055                 my $ref = \%trie;
3056         DIR:
3057                 foreach my $dir (split('/', $pr->{'path'})) {
3058                         if (exists $ref->{''}) {
3059                                 # found [shortest] prefix, is a fork - skip it
3060                                 push @{$ref->{''}{'forks'}}, $pr;
3061                                 next PROJECT;
3062                         }
3063                         if (!exists $ref->{$dir}) {
3064                                 # not in trie, cannot have prefix, not a fork
3065                                 push @filtered, $pr;
3066                                 next PROJECT;
3067                         }
3068                         # If the dir is there, we just walk one step down the trie.
3069                         $ref = $ref->{$dir};
3070                 }
3071                 # we ran out of trie
3072                 # (shouldn't happen: it's either no match, or end marker)
3073                 push @filtered, $pr;
3074         }
3075
3076         return @filtered;
3077 }
3078
3079 # note: fill_project_list_info must be run first,
3080 # for 'descr_long' and 'ctags' to be filled
3081 sub search_projects_list {
3082         my ($projlist, %opts) = @_;
3083         my $tagfilter  = $opts{'tagfilter'};
3084         my $search_re = $opts{'search_regexp'};
3085
3086         return @$projlist
3087                 unless ($tagfilter || $search_re);
3088
3089         # searching projects require filling to be run before it;
3090         fill_project_list_info($projlist,
3091                                $tagfilter  ? 'ctags' : (),
3092                                $search_re ? ('path', 'descr') : ());
3093         my @projects;
3094  PROJECT:
3095         foreach my $pr (@$projlist) {
3096
3097                 if ($tagfilter) {
3098                         next unless ref($pr->{'ctags'}) eq 'HASH';
3099                         next unless
3100                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3101                 }
3102
3103                 if ($search_re) {
3104                         next unless
3105                                 $pr->{'path'} =~ /$search_re/ ||
3106                                 $pr->{'descr_long'} =~ /$search_re/;
3107                 }
3108
3109                 push @projects, $pr;
3110         }
3111
3112         return @projects;
3113 }
3114
3115 our $gitweb_project_owner = undef;
3116 sub git_get_project_list_from_file {
3117
3118         return if (defined $gitweb_project_owner);
3119
3120         $gitweb_project_owner = {};
3121         # read from file (url-encoded):
3122         # 'git%2Fgit.git Linus+Torvalds'
3123         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3124         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3125         if (-f $projects_list) {
3126                 open(my $fd, '<', $projects_list);
3127                 while (my $line = <$fd>) {
3128                         chomp $line;
3129                         my ($pr, $ow) = split ' ', $line;
3130                         $pr = unescape($pr);
3131                         $ow = unescape($ow);
3132                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3133                 }
3134                 close $fd;
3135         }
3136 }
3137
3138 sub git_get_project_owner {
3139         my $project = shift;
3140         my $owner;
3141
3142         return undef unless $project;
3143         $git_dir = "$projectroot/$project";
3144
3145         if (!defined $gitweb_project_owner) {
3146                 git_get_project_list_from_file();
3147         }
3148
3149         if (exists $gitweb_project_owner->{$project}) {
3150                 $owner = $gitweb_project_owner->{$project};
3151         }
3152         if (!defined $owner){
3153                 $owner = git_get_project_config('owner');
3154         }
3155         if (!defined $owner) {
3156                 $owner = get_file_owner("$git_dir");
3157         }
3158
3159         return $owner;
3160 }
3161
3162 sub git_get_last_activity {
3163         my ($path) = @_;
3164         my $fd;
3165
3166         $git_dir = "$projectroot/$path";
3167         open($fd, "-|", git_cmd(), 'for-each-ref',
3168              '--format=%(committer)',
3169              '--sort=-committerdate',
3170              '--count=1',
3171              'refs/heads') or return;
3172         my $most_recent = <$fd>;
3173         close $fd or return;
3174         if (defined $most_recent &&
3175             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3176                 my $timestamp = $1;
3177                 my $age = time - $timestamp;
3178                 return ($age, age_string($age));
3179         }
3180         return (undef, undef);
3181 }
3182
3183 # Implementation note: when a single remote is wanted, we cannot use 'git
3184 # remote show -n' because that command always work (assuming it's a remote URL
3185 # if it's not defined), and we cannot use 'git remote show' because that would
3186 # try to make a network roundtrip. So the only way to find if that particular
3187 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3188 # and when we find what we want.
3189 sub git_get_remotes_list {
3190         my $wanted = shift;
3191         my %remotes = ();
3192
3193         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3194         return unless $fd;
3195         while (my $remote = <$fd>) {
3196                 chomp $remote;
3197                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3198                 next if $wanted and not $remote eq $wanted;
3199                 my ($url, $key) = ($1, $2);
3200
3201                 $remotes{$remote} ||= { 'heads' => () };
3202                 $remotes{$remote}{$key} = $url;
3203         }
3204         close $fd or return;
3205         return wantarray ? %remotes : \%remotes;
3206 }
3207
3208 # Takes a hash of remotes as first parameter and fills it by adding the
3209 # available remote heads for each of the indicated remotes.
3210 sub fill_remote_heads {
3211         my $remotes = shift;
3212         my @heads = map { "remotes/$_" } keys %$remotes;
3213         my @remoteheads = git_get_heads_list(undef, @heads);
3214         foreach my $remote (keys %$remotes) {
3215                 $remotes->{$remote}{'heads'} = [ grep {
3216                         $_->{'name'} =~ s!^$remote/!!
3217                         } @remoteheads ];
3218         }
3219 }
3220
3221 sub git_get_references {
3222         my $type = shift || "";
3223         my %refs;
3224         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3225         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3226         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3227                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3228                 or return;
3229
3230         while (my $line = <$fd>) {
3231                 chomp $line;
3232                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3233                         if (defined $refs{$1}) {
3234                                 push @{$refs{$1}}, $2;
3235                         } else {
3236                                 $refs{$1} = [ $2 ];
3237                         }
3238                 }
3239         }
3240         close $fd or return;
3241         return \%refs;
3242 }
3243
3244 sub git_get_rev_name_tags {
3245         my $hash = shift || return undef;
3246
3247         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3248                 or return;
3249         my $name_rev = <$fd>;
3250         close $fd;
3251
3252         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3253                 return $1;
3254         } else {
3255                 # catches also '$hash undefined' output
3256                 return undef;
3257         }
3258 }
3259
3260 ## ----------------------------------------------------------------------
3261 ## parse to hash functions
3262
3263 sub parse_date {
3264         my $epoch = shift;
3265         my $tz = shift || "-0000";
3266
3267         my %date;
3268         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3269         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3270         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3271         $date{'hour'} = $hour;
3272         $date{'minute'} = $min;
3273         $date{'mday'} = $mday;
3274         $date{'day'} = $days[$wday];
3275         $date{'month'} = $months[$mon];
3276         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3277                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3278         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3279                              $mday, $months[$mon], $hour ,$min;
3280         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3281                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3282
3283         my ($tz_sign, $tz_hour, $tz_min) =
3284                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3285         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3286         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3287         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3288         $date{'hour_local'} = $hour;
3289         $date{'minute_local'} = $min;
3290         $date{'tz_local'} = $tz;
3291         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3292                                   1900+$year, $mon+1, $mday,
3293                                   $hour, $min, $sec, $tz);
3294         return %date;
3295 }
3296
3297 sub parse_tag {
3298         my $tag_id = shift;
3299         my %tag;
3300         my @comment;
3301
3302         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3303         $tag{'id'} = $tag_id;
3304         while (my $line = <$fd>) {
3305                 chomp $line;
3306                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3307                         $tag{'object'} = $1;
3308                 } elsif ($line =~ m/^type (.+)$/) {
3309                         $tag{'type'} = $1;
3310                 } elsif ($line =~ m/^tag (.+)$/) {
3311                         $tag{'name'} = $1;
3312                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3313                         $tag{'author'} = $1;
3314                         $tag{'author_epoch'} = $2;
3315                         $tag{'author_tz'} = $3;
3316                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3317                                 $tag{'author_name'}  = $1;
3318                                 $tag{'author_email'} = $2;
3319                         } else {
3320                                 $tag{'author_name'} = $tag{'author'};
3321                         }
3322                 } elsif ($line =~ m/--BEGIN/) {
3323                         push @comment, $line;
3324                         last;
3325                 } elsif ($line eq "") {
3326                         last;
3327                 }
3328         }
3329         push @comment, <$fd>;
3330         $tag{'comment'} = \@comment;
3331         close $fd or return;
3332         if (!defined $tag{'name'}) {
3333                 return
3334         };
3335         return %tag
3336 }
3337
3338 sub parse_commit_text {
3339         my ($commit_text, $withparents) = @_;
3340         my @commit_lines = split '\n', $commit_text;
3341         my %co;
3342
3343         pop @commit_lines; # Remove '\0'
3344
3345         if (! @commit_lines) {
3346                 return;
3347         }
3348
3349         my $header = shift @commit_lines;
3350         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3351                 return;
3352         }
3353         ($co{'id'}, my @parents) = split ' ', $header;
3354         while (my $line = shift @commit_lines) {
3355                 last if $line eq "\n";
3356                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3357                         $co{'tree'} = $1;
3358                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3359                         push @parents, $1;
3360                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3361                         $co{'author'} = to_utf8($1);
3362                         $co{'author_epoch'} = $2;
3363                         $co{'author_tz'} = $3;
3364                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3365                                 $co{'author_name'}  = $1;
3366                                 $co{'author_email'} = $2;
3367                         } else {
3368                                 $co{'author_name'} = $co{'author'};
3369                         }
3370                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3371                         $co{'committer'} = to_utf8($1);
3372                         $co{'committer_epoch'} = $2;
3373                         $co{'committer_tz'} = $3;
3374                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3375                                 $co{'committer_name'}  = $1;
3376                                 $co{'committer_email'} = $2;
3377                         } else {
3378                                 $co{'committer_name'} = $co{'committer'};
3379                         }
3380                 }
3381         }
3382         if (!defined $co{'tree'}) {
3383                 return;
3384         };
3385         $co{'parents'} = \@parents;
3386         $co{'parent'} = $parents[0];
3387
3388         foreach my $title (@commit_lines) {
3389                 $title =~ s/^    //;
3390                 if ($title ne "") {
3391                         $co{'title'} = chop_str($title, 80, 5);
3392                         # remove leading stuff of merges to make the interesting part visible
3393                         if (length($title) > 50) {
3394                                 $title =~ s/^Automatic //;
3395                                 $title =~ s/^merge (of|with) /Merge ... /i;
3396                                 if (length($title) > 50) {
3397                                         $title =~ s/(http|rsync):\/\///;
3398                                 }
3399                                 if (length($title) > 50) {
3400                                         $title =~ s/(master|www|rsync)\.//;
3401                                 }
3402                                 if (length($title) > 50) {
3403                                         $title =~ s/kernel.org:?//;
3404                                 }
3405                                 if (length($title) > 50) {
3406                                         $title =~ s/\/pub\/scm//;
3407                                 }
3408                         }
3409                         $co{'title_short'} = chop_str($title, 50, 5);
3410                         last;
3411                 }
3412         }
3413         if (! defined $co{'title'} || $co{'title'} eq "") {
3414                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3415         }
3416         # remove added spaces
3417         foreach my $line (@commit_lines) {
3418                 $line =~ s/^    //;
3419         }
3420         $co{'comment'} = \@commit_lines;
3421
3422         my $age = time - $co{'committer_epoch'};
3423         $co{'age'} = $age;
3424         $co{'age_string'} = age_string($age);
3425         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3426         if ($age > 60*60*24*7*2) {
3427                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3428                 $co{'age_string_age'} = $co{'age_string'};
3429         } else {
3430                 $co{'age_string_date'} = $co{'age_string'};
3431                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3432         }
3433         return %co;
3434 }
3435
3436 sub parse_commit {
3437         my ($commit_id) = @_;
3438         my %co;
3439
3440         local $/ = "\0";
3441
3442         open my $fd, "-|", git_cmd(), "rev-list",
3443                 "--parents",
3444                 "--header",
3445                 "--max-count=1",
3446                 $commit_id,
3447                 "--",
3448                 or die_error(500, "Open git-rev-list failed");
3449         %co = parse_commit_text(<$fd>, 1);
3450         close $fd;
3451
3452         return %co;
3453 }
3454
3455 sub parse_commits {
3456         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3457         my @cos;
3458
3459         $maxcount ||= 1;
3460         $skip ||= 0;
3461
3462         local $/ = "\0";
3463
3464         open my $fd, "-|", git_cmd(), "rev-list",
3465                 "--header",
3466                 @args,
3467                 ("--max-count=" . $maxcount),
3468                 ("--skip=" . $skip),
3469                 @extra_options,
3470                 $commit_id,
3471                 "--",
3472                 ($filename ? ($filename) : ())
3473                 or die_error(500, "Open git-rev-list failed");
3474         while (my $line = <$fd>) {
3475                 my %co = parse_commit_text($line);
3476                 push @cos, \%co;
3477         }
3478         close $fd;
3479
3480         return wantarray ? @cos : \@cos;
3481 }
3482
3483 # parse line of git-diff-tree "raw" output
3484 sub parse_difftree_raw_line {
3485         my $line = shift;
3486         my %res;
3487
3488         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3489         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3490         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3491                 $res{'from_mode'} = $1;
3492                 $res{'to_mode'} = $2;
3493                 $res{'from_id'} = $3;
3494                 $res{'to_id'} = $4;
3495                 $res{'status'} = $5;
3496                 $res{'similarity'} = $6;
3497                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3498                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3499                 } else {
3500                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3501                 }
3502         }
3503         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3504         # combined diff (for merge commit)
3505         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3506                 $res{'nparents'}  = length($1);
3507                 $res{'from_mode'} = [ split(' ', $2) ];
3508                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3509                 $res{'from_id'} = [ split(' ', $3) ];
3510                 $res{'to_id'} = pop @{$res{'from_id'}};
3511                 $res{'status'} = [ split('', $4) ];
3512                 $res{'to_file'} = unquote($5);
3513         }
3514         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3515         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3516                 $res{'commit'} = $1;
3517         }
3518
3519         return wantarray ? %res : \%res;
3520 }
3521
3522 # wrapper: return parsed line of git-diff-tree "raw" output
3523 # (the argument might be raw line, or parsed info)
3524 sub parsed_difftree_line {
3525         my $line_or_ref = shift;
3526
3527         if (ref($line_or_ref) eq "HASH") {
3528                 # pre-parsed (or generated by hand)
3529                 return $line_or_ref;
3530         } else {
3531                 return parse_difftree_raw_line($line_or_ref);
3532         }
3533 }
3534
3535 # parse line of git-ls-tree output
3536 sub parse_ls_tree_line {
3537         my $line = shift;
3538         my %opts = @_;
3539         my %res;
3540
3541         if ($opts{'-l'}) {
3542                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3543                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3544
3545                 $res{'mode'} = $1;
3546                 $res{'type'} = $2;
3547                 $res{'hash'} = $3;
3548                 $res{'size'} = $4;
3549                 if ($opts{'-z'}) {
3550                         $res{'name'} = $5;
3551                 } else {
3552                         $res{'name'} = unquote($5);
3553                 }
3554         } else {
3555                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3556                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3557
3558                 $res{'mode'} = $1;
3559                 $res{'type'} = $2;
3560                 $res{'hash'} = $3;
3561                 if ($opts{'-z'}) {
3562                         $res{'name'} = $4;
3563                 } else {
3564                         $res{'name'} = unquote($4);
3565                 }
3566         }
3567
3568         return wantarray ? %res : \%res;
3569 }
3570
3571 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3572 sub parse_from_to_diffinfo {
3573         my ($diffinfo, $from, $to, @parents) = @_;
3574
3575         if ($diffinfo->{'nparents'}) {
3576                 # combined diff
3577                 $from->{'file'} = [];
3578                 $from->{'href'} = [];
3579                 fill_from_file_info($diffinfo, @parents)
3580                         unless exists $diffinfo->{'from_file'};
3581                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3582                         $from->{'file'}[$i] =
3583                                 defined $diffinfo->{'from_file'}[$i] ?
3584                                         $diffinfo->{'from_file'}[$i] :
3585                                         $diffinfo->{'to_file'};
3586                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3587                                 $from->{'href'}[$i] = href(action=>"blob",
3588                                                            hash_base=>$parents[$i],
3589                                                            hash=>$diffinfo->{'from_id'}[$i],
3590                                                            file_name=>$from->{'file'}[$i]);
3591                         } else {
3592                                 $from->{'href'}[$i] = undef;
3593                         }
3594                 }
3595         } else {
3596                 # ordinary (not combined) diff
3597                 $from->{'file'} = $diffinfo->{'from_file'};
3598                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3599                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3600                                                hash=>$diffinfo->{'from_id'},
3601                                                file_name=>$from->{'file'});
3602                 } else {
3603                         delete $from->{'href'};
3604                 }
3605         }
3606
3607         $to->{'file'} = $diffinfo->{'to_file'};
3608         if (!is_deleted($diffinfo)) { # file exists in result
3609                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3610                                      hash=>$diffinfo->{'to_id'},
3611                                      file_name=>$to->{'file'});
3612         } else {
3613                 delete $to->{'href'};
3614         }
3615 }
3616
3617 ## ......................................................................
3618 ## parse to array of hashes functions
3619
3620 sub git_get_heads_list {
3621         my ($limit, @classes) = @_;
3622         @classes = ('heads') unless @classes;
3623         my @patterns = map { "refs/$_" } @classes;
3624         my @headslist;
3625
3626         open my $fd, '-|', git_cmd(), 'for-each-ref',
3627                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3628                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3629                 @patterns
3630                 or return;
3631         while (my $line = <$fd>) {
3632                 my %ref_item;
3633
3634                 chomp $line;
3635                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3636                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3637                 my ($committer, $epoch, $tz) =
3638                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3639                 $ref_item{'fullname'}  = $name;
3640                 $name =~ s!^refs/(?:head|remote)s/!!;
3641
3642                 $ref_item{'name'}  = $name;
3643                 $ref_item{'id'}    = $hash;
3644                 $ref_item{'title'} = $title || '(no commit message)';
3645                 $ref_item{'epoch'} = $epoch;
3646                 if ($epoch) {
3647                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3648                 } else {
3649                         $ref_item{'age'} = "unknown";
3650                 }
3651
3652                 push @headslist, \%ref_item;
3653         }
3654         close $fd;
3655
3656         return wantarray ? @headslist : \@headslist;
3657 }
3658
3659 sub git_get_tags_list {
3660         my $limit = shift;
3661         my @tagslist;
3662
3663         open my $fd, '-|', git_cmd(), 'for-each-ref',
3664                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3665                 '--format=%(objectname) %(objecttype) %(refname) '.
3666                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3667                 'refs/tags'
3668                 or return;
3669         while (my $line = <$fd>) {
3670                 my %ref_item;
3671
3672                 chomp $line;
3673                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3674                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3675                 my ($creator, $epoch, $tz) =
3676                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3677                 $ref_item{'fullname'} = $name;
3678                 $name =~ s!^refs/tags/!!;
3679
3680                 $ref_item{'type'} = $type;
3681                 $ref_item{'id'} = $id;
3682                 $ref_item{'name'} = $name;
3683                 if ($type eq "tag") {
3684                         $ref_item{'subject'} = $title;
3685                         $ref_item{'reftype'} = $reftype;
3686                         $ref_item{'refid'}   = $refid;
3687                 } else {
3688                         $ref_item{'reftype'} = $type;
3689                         $ref_item{'refid'}   = $id;
3690                 }
3691
3692                 if ($type eq "tag" || $type eq "commit") {
3693                         $ref_item{'epoch'} = $epoch;
3694                         if ($epoch) {
3695                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3696                         } else {
3697                                 $ref_item{'age'} = "unknown";
3698                         }
3699                 }
3700
3701                 push @tagslist, \%ref_item;
3702         }
3703         close $fd;
3704
3705         return wantarray ? @tagslist : \@tagslist;
3706 }
3707
3708 ## ----------------------------------------------------------------------
3709 ## filesystem-related functions
3710
3711 sub get_file_owner {
3712         my $path = shift;
3713
3714         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3715         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3716         if (!defined $gcos) {
3717                 return undef;
3718         }
3719         my $owner = $gcos;
3720         $owner =~ s/[,;].*$//;
3721         return to_utf8($owner);
3722 }
3723
3724 # assume that file exists
3725 sub insert_file {
3726         my $filename = shift;
3727
3728         open my $fd, '<', $filename;
3729         print map { to_utf8($_) } <$fd>;
3730         close $fd;
3731 }
3732
3733 ## ......................................................................
3734 ## mimetype related functions
3735
3736 sub mimetype_guess_file {
3737         my $filename = shift;
3738         my $mimemap = shift;
3739         -r $mimemap or return undef;
3740
3741         my %mimemap;
3742         open(my $mh, '<', $mimemap) or return undef;
3743         while (<$mh>) {
3744                 next if m/^#/; # skip comments
3745                 my ($mimetype, @exts) = split(/\s+/);
3746                 foreach my $ext (@exts) {
3747                         $mimemap{$ext} = $mimetype;
3748                 }
3749         }
3750         close($mh);
3751
3752         $filename =~ /\.([^.]*)$/;
3753         return $mimemap{$1};
3754 }
3755
3756 sub mimetype_guess {
3757         my $filename = shift;
3758         my $mime;
3759         $filename =~ /\./ or return undef;
3760
3761         if ($mimetypes_file) {
3762                 my $file = $mimetypes_file;
3763                 if ($file !~ m!^/!) { # if it is relative path
3764                         # it is relative to project
3765                         $file = "$projectroot/$project/$file";
3766                 }
3767                 $mime = mimetype_guess_file($filename, $file);
3768         }
3769         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3770         return $mime;
3771 }
3772
3773 sub blob_mimetype {
3774         my $fd = shift;
3775         my $filename = shift;
3776
3777         if ($filename) {
3778                 my $mime = mimetype_guess($filename);
3779                 $mime and return $mime;
3780         }
3781
3782         # just in case
3783         return $default_blob_plain_mimetype unless $fd;
3784
3785         if (-T $fd) {
3786                 return 'text/plain';
3787         } elsif (! $filename) {
3788                 return 'application/octet-stream';
3789         } elsif ($filename =~ m/\.png$/i) {
3790                 return 'image/png';
3791         } elsif ($filename =~ m/\.gif$/i) {
3792                 return 'image/gif';
3793         } elsif ($filename =~ m/\.jpe?g$/i) {
3794                 return 'image/jpeg';
3795         } else {
3796                 return 'application/octet-stream';
3797         }
3798 }
3799
3800 sub blob_contenttype {
3801         my ($fd, $file_name, $type) = @_;
3802
3803         $type ||= blob_mimetype($fd, $file_name);
3804         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3805                 $type .= "; charset=$default_text_plain_charset";
3806         }
3807
3808         return $type;
3809 }
3810
3811 # guess file syntax for syntax highlighting; return undef if no highlighting
3812 # the name of syntax can (in the future) depend on syntax highlighter used
3813 sub guess_file_syntax {
3814         my ($highlight, $mimetype, $file_name) = @_;
3815         return undef unless ($highlight && defined $file_name);
3816         my $basename = basename($file_name, '.in');
3817         return $highlight_basename{$basename}
3818                 if exists $highlight_basename{$basename};
3819
3820         $basename =~ /\.([^.]*)$/;
3821         my $ext = $1 or return undef;
3822         return $highlight_ext{$ext}
3823                 if exists $highlight_ext{$ext};
3824
3825         return undef;
3826 }
3827
3828 # run highlighter and return FD of its output,
3829 # or return original FD if no highlighting
3830 sub run_highlighter {
3831         my ($fd, $highlight, $syntax) = @_;
3832         return $fd unless ($highlight && defined $syntax);
3833
3834         close $fd;
3835         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3836                   quote_command($highlight_bin).
3837                   " --replace-tabs=8 --fragment --syntax $syntax |"
3838                 or die_error(500, "Couldn't open file or run syntax highlighter");
3839         return $fd;
3840 }
3841
3842 ## ======================================================================
3843 ## functions printing HTML: header, footer, error page
3844
3845 sub get_page_title {
3846         my $title = to_utf8($site_name);
3847
3848         unless (defined $project) {
3849                 if (defined $project_filter) {
3850                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3851                 }
3852                 return $title;
3853         }
3854         $title .= " - " . to_utf8($project);
3855
3856         return $title unless (defined $action);
3857         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3858
3859         return $title unless (defined $file_name);
3860         $title .= " - " . esc_path($file_name);
3861         if ($action eq "tree" && $file_name !~ m|/$|) {
3862                 $title .= "/";
3863         }
3864
3865         return $title;
3866 }
3867
3868 sub get_content_type_html {
3869         # require explicit support from the UA if we are to send the page as
3870         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3871         # we have to do this because MSIE sometimes globs '*/*', pretending to
3872         # support xhtml+xml but choking when it gets what it asked for.
3873         if (defined $cgi->http('HTTP_ACCEPT') &&
3874             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3875             $cgi->Accept('application/xhtml+xml') != 0) {
3876                 return 'application/xhtml+xml';
3877         } else {
3878                 return 'text/html';
3879         }
3880 }
3881
3882 sub print_feed_meta {
3883         if (defined $project) {
3884                 my %href_params = get_feed_info();
3885                 if (!exists $href_params{'-title'}) {
3886                         $href_params{'-title'} = 'log';
3887                 }
3888
3889                 foreach my $format (qw(RSS Atom)) {
3890                         my $type = lc($format);
3891                         my %link_attr = (
3892                                 '-rel' => 'alternate',
3893                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3894                                 '-type' => "application/$type+xml"
3895                         );
3896
3897                         $href_params{'action'} = $type;
3898                         $link_attr{'-href'} = href(%href_params);
3899                         print "<link ".
3900                               "rel=\"$link_attr{'-rel'}\" ".
3901                               "title=\"$link_attr{'-title'}\" ".
3902                               "href=\"$link_attr{'-href'}\" ".
3903                               "type=\"$link_attr{'-type'}\" ".
3904                               "/>\n";
3905
3906                         $href_params{'extra_options'} = '--no-merges';
3907                         $link_attr{'-href'} = href(%href_params);
3908                         $link_attr{'-title'} .= ' (no merges)';
3909                         print "<link ".
3910                               "rel=\"$link_attr{'-rel'}\" ".
3911                               "title=\"$link_attr{'-title'}\" ".
3912                               "href=\"$link_attr{'-href'}\" ".
3913                               "type=\"$link_attr{'-type'}\" ".
3914                               "/>\n";
3915                 }
3916
3917         } else {
3918                 printf('<link rel="alternate" title="%s projects list" '.
3919                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3920                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3921                 printf('<link rel="alternate" title="%s projects feeds" '.
3922                        'href="%s" type="text/x-opml" />'."\n",
3923                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3924         }
3925 }
3926
3927 sub print_header_links {
3928         my $status = shift;
3929
3930         # print out each stylesheet that exist, providing backwards capability
3931         # for those people who defined $stylesheet in a config file
3932         if (defined $stylesheet) {
3933                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3934         } else {
3935                 foreach my $stylesheet (@stylesheets) {
3936                         next unless $stylesheet;
3937                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3938                 }
3939         }
3940         print_feed_meta()
3941                 if ($status eq '200 OK');
3942         if (defined $favicon) {
3943                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3944         }
3945 }
3946
3947 sub print_nav_breadcrumbs_path {
3948         my $dirprefix = undef;
3949         while (my $part = shift) {
3950                 $dirprefix .= "/" if defined $dirprefix;
3951                 $dirprefix .= $part;
3952                 print $cgi->a({-href => href(project => undef,
3953                                              project_filter => $dirprefix,
3954                                              action => "project_list")},
3955                               esc_html($part)) . " / ";
3956         }
3957 }
3958
3959 sub print_nav_breadcrumbs {
3960         my %opts = @_;
3961
3962         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3963         if (defined $project) {
3964                 my @dirname = split '/', $project;
3965                 my $projectbasename = pop @dirname;
3966                 print_nav_breadcrumbs_path(@dirname);
3967                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3968                 if (defined $action) {
3969                         my $action_print = $action ;
3970                         if (defined $opts{-action_extra}) {
3971                                 $action_print = $cgi->a({-href => href(action=>$action)},
3972                                         $action);
3973                         }
3974                         print " / $action_print";
3975                 }
3976                 if (defined $opts{-action_extra}) {
3977                         print " / $opts{-action_extra}";
3978                 }
3979                 print "\n";
3980         } elsif (defined $project_filter) {
3981                 print_nav_breadcrumbs_path(split '/', $project_filter);
3982         }
3983 }
3984
3985 sub print_search_form {
3986         if (!defined $searchtext) {
3987                 $searchtext = "";
3988         }
3989         my $search_hash;
3990         if (defined $hash_base) {
3991                 $search_hash = $hash_base;
3992         } elsif (defined $hash) {
3993                 $search_hash = $hash;
3994         } else {
3995                 $search_hash = "HEAD";
3996         }
3997         my $action = $my_uri;
3998         my $use_pathinfo = gitweb_check_feature('pathinfo');
3999         if ($use_pathinfo) {
4000                 $action .= "/".esc_url($project);
4001         }
4002         print $cgi->startform(-method => "get", -action => $action) .
4003               "<div class=\"search\">\n" .
4004               (!$use_pathinfo &&
4005               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4006               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4007               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4008               $cgi->popup_menu(-name => 'st', -default => 'commit',
4009                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4010               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4011               " search:\n",
4012               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4013               "<span title=\"Extended regular expression\">" .
4014               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4015                              -checked => $search_use_regexp) .
4016               "</span>" .
4017               "</div>" .
4018               $cgi->end_form() . "\n";
4019 }
4020
4021 sub git_header_html {
4022         my $status = shift || "200 OK";
4023         my $expires = shift;
4024         my %opts = @_;
4025
4026         my $title = get_page_title();
4027         my $content_type = get_content_type_html();
4028         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4029                            -status=> $status, -expires => $expires)
4030                 unless ($opts{'-no_http_header'});
4031         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4032         print <<EOF;
4033 <?xml version="1.0" encoding="utf-8"?>
4034 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4035 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4036 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4037 <!-- git core binaries version $git_version -->
4038 <head>
4039 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4040 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4041 <meta name="robots" content="index, nofollow"/>
4042 <title>$title</title>
4043 EOF
4044         # the stylesheet, favicon etc urls won't work correctly with path_info
4045         # unless we set the appropriate base URL
4046         if ($ENV{'PATH_INFO'}) {
4047                 print "<base href=\"".esc_url($base_url)."\" />\n";
4048         }
4049         print_header_links($status);
4050
4051         if (defined $site_html_head_string) {
4052                 print to_utf8($site_html_head_string);
4053         }
4054
4055         print "</head>\n" .
4056               "<body>\n";
4057
4058         if (defined $site_header && -f $site_header) {
4059                 insert_file($site_header);
4060         }
4061
4062         print "<div class=\"page_header\">\n";
4063         if (defined $logo) {
4064                 print $cgi->a({-href => esc_url($logo_url),
4065                                -title => $logo_label},
4066                               $cgi->img({-src => esc_url($logo),
4067                                          -width => 72, -height => 27,
4068                                          -alt => "git",
4069                                          -class => "logo"}));
4070         }
4071         print_nav_breadcrumbs(%opts);
4072         print "</div>\n";
4073
4074         my $have_search = gitweb_check_feature('search');
4075         if (defined $project && $have_search) {
4076                 print_search_form();
4077         }
4078 }
4079
4080 sub git_footer_html {
4081         my $feed_class = 'rss_logo';
4082
4083         print "<div class=\"page_footer\">\n";
4084         if (defined $project) {
4085                 my $descr = git_get_project_description($project);
4086                 if (defined $descr) {
4087                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4088                 }
4089
4090                 my %href_params = get_feed_info();
4091                 if (!%href_params) {
4092                         $feed_class .= ' generic';
4093                 }
4094                 $href_params{'-title'} ||= 'log';
4095
4096                 foreach my $format (qw(RSS Atom)) {
4097                         $href_params{'action'} = lc($format);
4098                         print $cgi->a({-href => href(%href_params),
4099                                       -title => "$href_params{'-title'} $format feed",
4100                                       -class => $feed_class}, $format)."\n";
4101                 }
4102
4103         } else {
4104                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4105                                              project_filter => $project_filter),
4106                               -class => $feed_class}, "OPML") . " ";
4107                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4108                                              project_filter => $project_filter),
4109                               -class => $feed_class}, "TXT") . "\n";
4110         }
4111         print "</div>\n"; # class="page_footer"
4112
4113         if (defined $t0 && gitweb_check_feature('timed')) {
4114                 print "<div id=\"generating_info\">\n";
4115                 print 'This page took '.
4116                       '<span id="generating_time" class="time_span">'.
4117                       tv_interval($t0, [ gettimeofday() ]).
4118                       ' seconds </span>'.
4119                       ' and '.
4120                       '<span id="generating_cmd">'.
4121                       $number_of_git_cmds.
4122                       '</span> git commands '.
4123                       " to generate.\n";
4124                 print "</div>\n"; # class="page_footer"
4125         }
4126
4127         if (defined $site_footer && -f $site_footer) {
4128                 insert_file($site_footer);
4129         }
4130
4131         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4132         if (defined $action &&
4133             $action eq 'blame_incremental') {
4134                 print qq!<script type="text/javascript">\n!.
4135                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4136                       qq!           "!. href() .qq!");\n!.
4137                       qq!</script>\n!;
4138         } else {
4139                 my ($jstimezone, $tz_cookie, $datetime_class) =
4140                         gitweb_get_feature('javascript-timezone');
4141
4142                 print qq!<script type="text/javascript">\n!.
4143                       qq!window.onload = function () {\n!;
4144                 if (gitweb_check_feature('javascript-actions')) {
4145                         print qq!       fixLinks();\n!;
4146                 }
4147                 if ($jstimezone && $tz_cookie && $datetime_class) {
4148                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4149                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4150                 }
4151                 print qq!};\n!.
4152                       qq!</script>\n!;
4153         }
4154
4155         print "</body>\n" .
4156               "</html>";
4157 }
4158
4159 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4160 # Example: die_error(404, 'Hash not found')
4161 # By convention, use the following status codes (as defined in RFC 2616):
4162 # 400: Invalid or missing CGI parameters, or
4163 #      requested object exists but has wrong type.
4164 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4165 #      this server or project.
4166 # 404: Requested object/revision/project doesn't exist.
4167 # 500: The server isn't configured properly, or
4168 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4169 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4170 # 503: The server is currently unavailable (because it is overloaded,
4171 #      or down for maintenance).  Generally, this is a temporary state.
4172 sub die_error {
4173         my $status = shift || 500;
4174         my $error = esc_html(shift) || "Internal Server Error";
4175         my $extra = shift;
4176         my %opts = @_;
4177
4178         my %http_responses = (
4179                 400 => '400 Bad Request',
4180                 403 => '403 Forbidden',
4181                 404 => '404 Not Found',
4182                 500 => '500 Internal Server Error',
4183                 503 => '503 Service Unavailable',
4184         );
4185         git_header_html($http_responses{$status}, undef, %opts);
4186         print <<EOF;
4187 <div class="page_body">
4188 <br /><br />
4189 $status - $error
4190 <br />
4191 EOF
4192         if (defined $extra) {
4193                 print "<hr />\n" .
4194                       "$extra\n";
4195         }
4196         print "</div>\n";
4197
4198         git_footer_html();
4199         goto DONE_GITWEB
4200                 unless ($opts{'-error_handler'});
4201 }
4202
4203 ## ----------------------------------------------------------------------
4204 ## functions printing or outputting HTML: navigation
4205
4206 sub git_print_page_nav {
4207         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4208         $extra = '' if !defined $extra; # pager or formats
4209
4210         my @navs = qw(summary shortlog log commit commitdiff tree);
4211         if ($suppress) {
4212                 @navs = grep { $_ ne $suppress } @navs;
4213         }
4214
4215         my %arg = map { $_ => {action=>$_} } @navs;
4216         if (defined $head) {
4217                 for (qw(commit commitdiff)) {
4218                         $arg{$_}{'hash'} = $head;
4219                 }
4220                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4221                         for (qw(shortlog log)) {
4222                                 $arg{$_}{'hash'} = $head;
4223                         }
4224                 }
4225         }
4226
4227         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4228         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4229
4230         my @actions = gitweb_get_feature('actions');
4231         my %repl = (
4232                 '%' => '%',
4233                 'n' => $project,         # project name
4234                 'f' => $git_dir,         # project path within filesystem
4235                 'h' => $treehead || '',  # current hash ('h' parameter)
4236                 'b' => $treebase || '',  # hash base ('hb' parameter)
4237         );
4238         while (@actions) {
4239                 my ($label, $link, $pos) = splice(@actions,0,3);
4240                 # insert
4241                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4242                 # munch munch
4243                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4244                 $arg{$label}{'_href'} = $link;
4245         }
4246
4247         print "<div class=\"page_nav\">\n" .
4248                 (join " | ",
4249                  map { $_ eq $current ?
4250                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4251                  } @navs);
4252         print "<br/>\n$extra<br/>\n" .
4253               "</div>\n";
4254 }
4255
4256 # returns a submenu for the nagivation of the refs views (tags, heads,
4257 # remotes) with the current view disabled and the remotes view only
4258 # available if the feature is enabled
4259 sub format_ref_views {
4260         my ($current) = @_;
4261         my @ref_views = qw{tags heads};
4262         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4263         return join " | ", map {
4264                 $_ eq $current ? $_ :
4265                 $cgi->a({-href => href(action=>$_)}, $_)
4266         } @ref_views
4267 }
4268
4269 sub format_paging_nav {
4270         my ($action, $page, $has_next_link) = @_;
4271         my $paging_nav;
4272
4273
4274         if ($page > 0) {
4275                 $paging_nav .=
4276                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4277                         " &sdot; " .
4278                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4279                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4280         } else {
4281                 $paging_nav .= "first &sdot; prev";
4282         }
4283
4284         if ($has_next_link) {
4285                 $paging_nav .= " &sdot; " .
4286                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4287                                  -accesskey => "n", -title => "Alt-n"}, "next");
4288         } else {
4289                 $paging_nav .= " &sdot; next";
4290         }
4291
4292         return $paging_nav;
4293 }
4294
4295 ## ......................................................................
4296 ## functions printing or outputting HTML: div
4297
4298 sub git_print_header_div {
4299         my ($action, $title, $hash, $hash_base) = @_;
4300         my %args = ();
4301
4302         $args{'action'} = $action;
4303         $args{'hash'} = $hash if $hash;
4304         $args{'hash_base'} = $hash_base if $hash_base;
4305
4306         print "<div class=\"header\">\n" .
4307               $cgi->a({-href => href(%args), -class => "title"},
4308               $title ? $title : $action) .
4309               "\n</div>\n";
4310 }
4311
4312 sub format_repo_url {
4313         my ($name, $url) = @_;
4314         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4315 }
4316
4317 # Group output by placing it in a DIV element and adding a header.
4318 # Options for start_div() can be provided by passing a hash reference as the
4319 # first parameter to the function.
4320 # Options to git_print_header_div() can be provided by passing an array
4321 # reference. This must follow the options to start_div if they are present.
4322 # The content can be a scalar, which is output as-is, a scalar reference, which
4323 # is output after html escaping, an IO handle passed either as *handle or
4324 # *handle{IO}, or a function reference. In the latter case all following
4325 # parameters will be taken as argument to the content function call.
4326 sub git_print_section {
4327         my ($div_args, $header_args, $content);
4328         my $arg = shift;
4329         if (ref($arg) eq 'HASH') {
4330                 $div_args = $arg;
4331                 $arg = shift;
4332         }
4333         if (ref($arg) eq 'ARRAY') {
4334                 $header_args = $arg;
4335                 $arg = shift;
4336         }
4337         $content = $arg;
4338
4339         print $cgi->start_div($div_args);
4340         git_print_header_div(@$header_args);
4341
4342         if (ref($content) eq 'CODE') {
4343                 $content->(@_);
4344         } elsif (ref($content) eq 'SCALAR') {
4345                 print esc_html($$content);
4346         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4347                 print <$content>;
4348         } elsif (!ref($content) && defined($content)) {
4349                 print $content;
4350         }
4351
4352         print $cgi->end_div;
4353 }
4354
4355 sub format_timestamp_html {
4356         my $date = shift;
4357         my $strtime = $date->{'rfc2822'};
4358
4359         my (undef, undef, $datetime_class) =
4360                 gitweb_get_feature('javascript-timezone');
4361         if ($datetime_class) {
4362                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4363         }
4364
4365         my $localtime_format = '(%02d:%02d %s)';
4366         if ($date->{'hour_local'} < 6) {
4367                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4368         }
4369         $strtime .= ' ' .
4370                     sprintf($localtime_format,
4371                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4372
4373         return $strtime;
4374 }
4375
4376 # Outputs the author name and date in long form
4377 sub git_print_authorship {
4378         my $co = shift;
4379         my %opts = @_;
4380         my $tag = $opts{-tag} || 'div';
4381         my $author = $co->{'author_name'};
4382
4383         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4384         print "<$tag class=\"author_date\">" .
4385               format_search_author($author, "author", esc_html($author)) .
4386               " [".format_timestamp_html(\%ad)."]".
4387               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4388               "</$tag>\n";
4389 }
4390
4391 # Outputs table rows containing the full author or committer information,
4392 # in the format expected for 'commit' view (& similar).
4393 # Parameters are a commit hash reference, followed by the list of people
4394 # to output information for. If the list is empty it defaults to both
4395 # author and committer.
4396 sub git_print_authorship_rows {
4397         my $co = shift;
4398         # too bad we can't use @people = @_ || ('author', 'committer')
4399         my @people = @_;
4400         @people = ('author', 'committer') unless @people;
4401         foreach my $who (@people) {
4402                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4403                 print "<tr><td>$who</td><td>" .
4404                       format_search_author($co->{"${who}_name"}, $who,
4405                                            esc_html($co->{"${who}_name"})) . " " .
4406                       format_search_author($co->{"${who}_email"}, $who,
4407                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4408                       "</td><td rowspan=\"2\">" .
4409                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4410                       "</td></tr>\n" .
4411                       "<tr>" .
4412                       "<td></td><td>" .
4413                       format_timestamp_html(\%wd) .
4414                       "</td>" .
4415                       "</tr>\n";
4416         }
4417 }
4418
4419 sub git_print_page_path {
4420         my $name = shift;
4421         my $type = shift;
4422         my $hb = shift;
4423
4424
4425         print "<div class=\"page_path\">";
4426         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4427                       -title => 'tree root'}, to_utf8("[$project]"));
4428         print " / ";
4429         if (defined $name) {
4430                 my @dirname = split '/', $name;
4431                 my $basename = pop @dirname;
4432                 my $fullname = '';
4433
4434                 foreach my $dir (@dirname) {
4435                         $fullname .= ($fullname ? '/' : '') . $dir;
4436                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4437                                                      hash_base=>$hb),
4438                                       -title => $fullname}, esc_path($dir));
4439                         print " / ";
4440                 }
4441                 if (defined $type && $type eq 'blob') {
4442                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4443                                                      hash_base=>$hb),
4444                                       -title => $name}, esc_path($basename));
4445                 } elsif (defined $type && $type eq 'tree') {
4446                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4447                                                      hash_base=>$hb),
4448                                       -title => $name}, esc_path($basename));
4449                         print " / ";
4450                 } else {
4451                         print esc_path($basename);
4452                 }
4453         }
4454         print "<br/></div>\n";
4455 }
4456
4457 sub git_print_log {
4458         my $log = shift;
4459         my %opts = @_;
4460
4461         if ($opts{'-remove_title'}) {
4462                 # remove title, i.e. first line of log
4463                 shift @$log;
4464         }
4465         # remove leading empty lines
4466         while (defined $log->[0] && $log->[0] eq "") {
4467                 shift @$log;
4468         }
4469
4470         # print log
4471         my $signoff = 0;
4472         my $empty = 0;
4473         foreach my $line (@$log) {
4474                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4475                         $signoff = 1;
4476                         $empty = 0;
4477                         if (! $opts{'-remove_signoff'}) {
4478                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4479                                 next;
4480                         } else {
4481                                 # remove signoff lines
4482                                 next;
4483                         }
4484                 } else {
4485                         $signoff = 0;
4486                 }
4487
4488                 # print only one empty line
4489                 # do not print empty line after signoff
4490                 if ($line eq "") {
4491                         next if ($empty || $signoff);
4492                         $empty = 1;
4493                 } else {
4494                         $empty = 0;
4495                 }
4496
4497                 print format_log_line_html($line) . "<br/>\n";
4498         }
4499
4500         if ($opts{'-final_empty_line'}) {
4501                 # end with single empty line
4502                 print "<br/>\n" unless $empty;
4503         }
4504 }
4505
4506 # return link target (what link points to)
4507 sub git_get_link_target {
4508         my $hash = shift;
4509         my $link_target;
4510
4511         # read link
4512         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4513                 or return;
4514         {
4515                 local $/ = undef;
4516                 $link_target = <$fd>;
4517         }
4518         close $fd
4519                 or return;
4520
4521         return $link_target;
4522 }
4523
4524 # given link target, and the directory (basedir) the link is in,
4525 # return target of link relative to top directory (top tree);
4526 # return undef if it is not possible (including absolute links).
4527 sub normalize_link_target {
4528         my ($link_target, $basedir) = @_;
4529
4530         # absolute symlinks (beginning with '/') cannot be normalized
4531         return if (substr($link_target, 0, 1) eq '/');
4532
4533         # normalize link target to path from top (root) tree (dir)
4534         my $path;
4535         if ($basedir) {
4536                 $path = $basedir . '/' . $link_target;
4537         } else {
4538                 # we are in top (root) tree (dir)
4539                 $path = $link_target;
4540         }
4541
4542         # remove //, /./, and /../
4543         my @path_parts;
4544         foreach my $part (split('/', $path)) {
4545                 # discard '.' and ''
4546                 next if (!$part || $part eq '.');
4547                 # handle '..'
4548                 if ($part eq '..') {
4549                         if (@path_parts) {
4550                                 pop @path_parts;
4551                         } else {
4552                                 # link leads outside repository (outside top dir)
4553                                 return;
4554                         }
4555                 } else {
4556                         push @path_parts, $part;
4557                 }
4558         }
4559         $path = join('/', @path_parts);
4560
4561         return $path;
4562 }
4563
4564 # print tree entry (row of git_tree), but without encompassing <tr> element
4565 sub git_print_tree_entry {
4566         my ($t, $basedir, $hash_base, $have_blame) = @_;
4567
4568         my %base_key = ();
4569         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4570
4571         # The format of a table row is: mode list link.  Where mode is
4572         # the mode of the entry, list is the name of the entry, an href,
4573         # and link is the action links of the entry.
4574
4575         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4576         if (exists $t->{'size'}) {
4577                 print "<td class=\"size\">$t->{'size'}</td>\n";
4578         }
4579         if ($t->{'type'} eq "blob") {
4580                 print "<td class=\"list\">" .
4581                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4582                                                file_name=>"$basedir$t->{'name'}", %base_key),
4583                                 -class => "list"}, esc_path($t->{'name'}));
4584                 if (S_ISLNK(oct $t->{'mode'})) {
4585                         my $link_target = git_get_link_target($t->{'hash'});
4586                         if ($link_target) {
4587                                 my $norm_target = normalize_link_target($link_target, $basedir);
4588                                 if (defined $norm_target) {
4589                                         print " -> " .
4590                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4591                                                                      file_name=>$norm_target),
4592                                                        -title => $norm_target}, esc_path($link_target));
4593                                 } else {
4594                                         print " -> " . esc_path($link_target);
4595                                 }
4596                         }
4597                 }
4598                 print "</td>\n";
4599                 print "<td class=\"link\">";
4600                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4601                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4602                               "blob");
4603                 if ($have_blame) {
4604                         print " | " .
4605                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4606                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4607                                       "blame");
4608                 }
4609                 if (defined $hash_base) {
4610                         print " | " .
4611                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4612                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4613                                       "history");
4614                 }
4615                 print " | " .
4616                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4617                                                file_name=>"$basedir$t->{'name'}")},
4618                                 "raw");
4619                 print "</td>\n";
4620
4621         } elsif ($t->{'type'} eq "tree") {
4622                 print "<td class=\"list\">";
4623                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4624                                              file_name=>"$basedir$t->{'name'}",
4625                                              %base_key)},
4626                               esc_path($t->{'name'}));
4627                 print "</td>\n";
4628                 print "<td class=\"link\">";
4629                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4630                                              file_name=>"$basedir$t->{'name'}",
4631                                              %base_key)},
4632                               "tree");
4633                 if (defined $hash_base) {
4634                         print " | " .
4635                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4636                                                      file_name=>"$basedir$t->{'name'}")},
4637                                       "history");
4638                 }
4639                 print "</td>\n";
4640         } else {
4641                 # unknown object: we can only present history for it
4642                 # (this includes 'commit' object, i.e. submodule support)
4643                 print "<td class=\"list\">" .
4644                       esc_path($t->{'name'}) .
4645                       "</td>\n";
4646                 print "<td class=\"link\">";
4647                 if (defined $hash_base) {
4648                         print $cgi->a({-href => href(action=>"history",
4649                                                      hash_base=>$hash_base,
4650                                                      file_name=>"$basedir$t->{'name'}")},
4651                                       "history");
4652                 }
4653                 print "</td>\n";
4654         }
4655 }
4656
4657 ## ......................................................................
4658 ## functions printing large fragments of HTML
4659
4660 # get pre-image filenames for merge (combined) diff
4661 sub fill_from_file_info {
4662         my ($diff, @parents) = @_;
4663
4664         $diff->{'from_file'} = [ ];
4665         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4666         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4667                 if ($diff->{'status'}[$i] eq 'R' ||
4668                     $diff->{'status'}[$i] eq 'C') {
4669                         $diff->{'from_file'}[$i] =
4670                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4671                 }
4672         }
4673
4674         return $diff;
4675 }
4676
4677 # is current raw difftree line of file deletion
4678 sub is_deleted {
4679         my $diffinfo = shift;
4680
4681         return $diffinfo->{'to_id'} eq ('0' x 40);
4682 }
4683
4684 # does patch correspond to [previous] difftree raw line
4685 # $diffinfo  - hashref of parsed raw diff format
4686 # $patchinfo - hashref of parsed patch diff format
4687 #              (the same keys as in $diffinfo)
4688 sub is_patch_split {
4689         my ($diffinfo, $patchinfo) = @_;
4690
4691         return defined $diffinfo && defined $patchinfo
4692                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4693 }
4694
4695
4696 sub git_difftree_body {
4697         my ($difftree, $hash, @parents) = @_;
4698         my ($parent) = $parents[0];
4699         my $have_blame = gitweb_check_feature('blame');
4700         print "<div class=\"list_head\">\n";
4701         if ($#{$difftree} > 10) {
4702                 print(($#{$difftree} + 1) . " files changed:\n");
4703         }
4704         print "</div>\n";
4705
4706         print "<table class=\"" .
4707               (@parents > 1 ? "combined " : "") .
4708               "diff_tree\">\n";
4709
4710         # header only for combined diff in 'commitdiff' view
4711         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4712         if ($has_header) {
4713                 # table header
4714                 print "<thead><tr>\n" .
4715                        "<th></th><th></th>\n"; # filename, patchN link
4716                 for (my $i = 0; $i < @parents; $i++) {
4717                         my $par = $parents[$i];
4718                         print "<th>" .
4719                               $cgi->a({-href => href(action=>"commitdiff",
4720                                                      hash=>$hash, hash_parent=>$par),
4721                                        -title => 'commitdiff to parent number ' .
4722                                                   ($i+1) . ': ' . substr($par,0,7)},
4723                                       $i+1) .
4724                               "&nbsp;</th>\n";
4725                 }
4726                 print "</tr></thead>\n<tbody>\n";
4727         }
4728
4729         my $alternate = 1;
4730         my $patchno = 0;
4731         foreach my $line (@{$difftree}) {
4732                 my $diff = parsed_difftree_line($line);
4733
4734                 if ($alternate) {
4735                         print "<tr class=\"dark\">\n";
4736                 } else {
4737                         print "<tr class=\"light\">\n";
4738                 }
4739                 $alternate ^= 1;
4740
4741                 if (exists $diff->{'nparents'}) { # combined diff
4742
4743                         fill_from_file_info($diff, @parents)
4744                                 unless exists $diff->{'from_file'};
4745
4746                         if (!is_deleted($diff)) {
4747                                 # file exists in the result (child) commit
4748                                 print "<td>" .
4749                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4750                                                              file_name=>$diff->{'to_file'},
4751                                                              hash_base=>$hash),
4752                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4753                                       "</td>\n";
4754                         } else {
4755                                 print "<td>" .
4756                                       esc_path($diff->{'to_file'}) .
4757                                       "</td>\n";
4758                         }
4759
4760                         if ($action eq 'commitdiff') {
4761                                 # link to patch
4762                                 $patchno++;
4763                                 print "<td class=\"link\">" .
4764                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4765                                               "patch") .
4766                                       " | " .
4767                                       "</td>\n";
4768                         }
4769
4770                         my $has_history = 0;
4771                         my $not_deleted = 0;
4772                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4773                                 my $hash_parent = $parents[$i];
4774                                 my $from_hash = $diff->{'from_id'}[$i];
4775                                 my $from_path = $diff->{'from_file'}[$i];
4776                                 my $status = $diff->{'status'}[$i];
4777
4778                                 $has_history ||= ($status ne 'A');
4779                                 $not_deleted ||= ($status ne 'D');
4780
4781                                 if ($status eq 'A') {
4782                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4783                                 } elsif ($status eq 'D') {
4784                                         print "<td class=\"link\">" .
4785                                               $cgi->a({-href => href(action=>"blob",
4786                                                                      hash_base=>$hash,
4787                                                                      hash=>$from_hash,
4788                                                                      file_name=>$from_path)},
4789                                                       "blob" . ($i+1)) .
4790                                               " | </td>\n";
4791                                 } else {
4792                                         if ($diff->{'to_id'} eq $from_hash) {
4793                                                 print "<td class=\"link nochange\">";
4794                                         } else {
4795                                                 print "<td class=\"link\">";
4796                                         }
4797                                         print $cgi->a({-href => href(action=>"blobdiff",
4798                                                                      hash=>$diff->{'to_id'},
4799                                                                      hash_parent=>$from_hash,
4800                                                                      hash_base=>$hash,
4801                                                                      hash_parent_base=>$hash_parent,
4802                                                                      file_name=>$diff->{'to_file'},
4803                                                                      file_parent=>$from_path)},
4804                                                       "diff" . ($i+1)) .
4805                                               " | </td>\n";
4806                                 }
4807                         }
4808
4809                         print "<td class=\"link\">";
4810                         if ($not_deleted) {
4811                                 print $cgi->a({-href => href(action=>"blob",
4812                                                              hash=>$diff->{'to_id'},
4813                                                              file_name=>$diff->{'to_file'},
4814                                                              hash_base=>$hash)},
4815                                               "blob");
4816                                 print " | " if ($has_history);
4817                         }
4818                         if ($has_history) {
4819                                 print $cgi->a({-href => href(action=>"history",
4820                                                              file_name=>$diff->{'to_file'},
4821                                                              hash_base=>$hash)},
4822                                               "history");
4823                         }
4824                         print "</td>\n";
4825
4826                         print "</tr>\n";
4827                         next; # instead of 'else' clause, to avoid extra indent
4828                 }
4829                 # else ordinary diff
4830
4831                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4832                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4833                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4834                         $to_mode_oct = oct $diff->{'to_mode'};
4835                         if (S_ISREG($to_mode_oct)) { # only for regular file
4836                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4837                         }
4838                         $to_file_type = file_type($diff->{'to_mode'});
4839                 }
4840                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4841                         $from_mode_oct = oct $diff->{'from_mode'};
4842                         if (S_ISREG($from_mode_oct)) { # only for regular file
4843                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4844                         }
4845                         $from_file_type = file_type($diff->{'from_mode'});
4846                 }
4847
4848                 if ($diff->{'status'} eq "A") { # created
4849                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4850                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4851                         $mode_chng   .= "]</span>";
4852                         print "<td>";
4853                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4854                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4855                                       -class => "list"}, esc_path($diff->{'file'}));
4856                         print "</td>\n";
4857                         print "<td>$mode_chng</td>\n";
4858                         print "<td class=\"link\">";
4859                         if ($action eq 'commitdiff') {
4860                                 # link to patch
4861                                 $patchno++;
4862                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4863                                               "patch") .
4864                                       " | ";
4865                         }
4866                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4867                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4868                                       "blob");
4869                         print "</td>\n";
4870
4871                 } elsif ($diff->{'status'} eq "D") { # deleted
4872                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4873                         print "<td>";
4874                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4875                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4876                                        -class => "list"}, esc_path($diff->{'file'}));
4877                         print "</td>\n";
4878                         print "<td>$mode_chng</td>\n";
4879                         print "<td class=\"link\">";
4880                         if ($action eq 'commitdiff') {
4881                                 # link to patch
4882                                 $patchno++;
4883                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4884                                               "patch") .
4885                                       " | ";
4886                         }
4887                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4888                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4889                                       "blob") . " | ";
4890                         if ($have_blame) {
4891                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4892                                                              file_name=>$diff->{'file'})},
4893                                               "blame") . " | ";
4894                         }
4895                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4896                                                      file_name=>$diff->{'file'})},
4897                                       "history");
4898                         print "</td>\n";
4899
4900                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4901                         my $mode_chnge = "";
4902                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4903                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4904                                 if ($from_file_type ne $to_file_type) {
4905                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4906                                 }
4907                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4908                                         if ($from_mode_str && $to_mode_str) {
4909                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4910                                         } elsif ($to_mode_str) {
4911                                                 $mode_chnge .= " mode: $to_mode_str";
4912                                         }
4913                                 }
4914                                 $mode_chnge .= "]</span>\n";
4915                         }
4916                         print "<td>";
4917                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4918                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4919                                       -class => "list"}, esc_path($diff->{'file'}));
4920                         print "</td>\n";
4921                         print "<td>$mode_chnge</td>\n";
4922                         print "<td class=\"link\">";
4923                         if ($action eq 'commitdiff') {
4924                                 # link to patch
4925                                 $patchno++;
4926                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4927                                               "patch") .
4928                                       " | ";
4929                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4930                                 # "commit" view and modified file (not onlu mode changed)
4931                                 print $cgi->a({-href => href(action=>"blobdiff",
4932                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4933                                                              hash_base=>$hash, hash_parent_base=>$parent,
4934                                                              file_name=>$diff->{'file'})},
4935                                               "diff") .
4936                                       " | ";
4937                         }
4938                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4939                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4940                                        "blob") . " | ";
4941                         if ($have_blame) {
4942                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4943                                                              file_name=>$diff->{'file'})},
4944                                               "blame") . " | ";
4945                         }
4946                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4947                                                      file_name=>$diff->{'file'})},
4948                                       "history");
4949                         print "</td>\n";
4950
4951                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4952                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4953                         my $nstatus = $status_name{$diff->{'status'}};
4954                         my $mode_chng = "";
4955                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4956                                 # mode also for directories, so we cannot use $to_mode_str
4957                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4958                         }
4959                         print "<td>" .
4960                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4961                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4962                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4963                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4964                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4965                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4966                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4967                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4968                               "<td class=\"link\">";
4969                         if ($action eq 'commitdiff') {
4970                                 # link to patch
4971                                 $patchno++;
4972                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4973                                               "patch") .
4974                                       " | ";
4975                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4976                                 # "commit" view and modified file (not only pure rename or copy)
4977                                 print $cgi->a({-href => href(action=>"blobdiff",
4978                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4979                                                              hash_base=>$hash, hash_parent_base=>$parent,
4980                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4981                                               "diff") .
4982                                       " | ";
4983                         }
4984                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4985                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4986                                       "blob") . " | ";
4987                         if ($have_blame) {
4988                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4989                                                              file_name=>$diff->{'to_file'})},
4990                                               "blame") . " | ";
4991                         }
4992                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4993                                                     file_name=>$diff->{'to_file'})},
4994                                       "history");
4995                         print "</td>\n";
4996
4997                 } # we should not encounter Unmerged (U) or Unknown (X) status
4998                 print "</tr>\n";
4999         }
5000         print "</tbody>" if $has_header;
5001         print "</table>\n";
5002 }
5003
5004 sub print_sidebyside_diff_chunk {
5005         my @chunk = @_;
5006         my (@ctx, @rem, @add);
5007
5008         return unless @chunk;
5009
5010         # incomplete last line might be among removed or added lines,
5011         # or both, or among context lines: find which
5012         for (my $i = 1; $i < @chunk; $i++) {
5013                 if ($chunk[$i][0] eq 'incomplete') {
5014                         $chunk[$i][0] = $chunk[$i-1][0];
5015                 }
5016         }
5017
5018         # guardian
5019         push @chunk, ["", ""];
5020
5021         foreach my $line_info (@chunk) {
5022                 my ($class, $line) = @$line_info;
5023
5024                 # print chunk headers
5025                 if ($class && $class eq 'chunk_header') {
5026                         print $line;
5027                         next;
5028                 }
5029
5030                 ## print from accumulator when type of class of lines change
5031                 # empty contents block on start rem/add block, or end of chunk
5032                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
5033                         print join '',
5034                                 '<div class="chunk_block ctx">',
5035                                         '<div class="old">',
5036                                         @ctx,
5037                                         '</div>',
5038                                         '<div class="new">',
5039                                         @ctx,
5040                                         '</div>',
5041                                 '</div>';
5042                         @ctx = ();
5043                 }
5044                 # empty add/rem block on start context block, or end of chunk
5045                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
5046                         if (!@add) {
5047                                 # pure removal
5048                                 print join '',
5049                                         '<div class="chunk_block rem">',
5050                                                 '<div class="old">',
5051                                                 @rem,
5052                                                 '</div>',
5053                                         '</div>';
5054                         } elsif (!@rem) {
5055                                 # pure addition
5056                                 print join '',
5057                                         '<div class="chunk_block add">',
5058                                                 '<div class="new">',
5059                                                 @add,
5060                                                 '</div>',
5061                                         '</div>';
5062                         } else {
5063                                 # assume that it is change
5064                                 print join '',
5065                                         '<div class="chunk_block chg">',
5066                                                 '<div class="old">',
5067                                                 @rem,
5068                                                 '</div>',
5069                                                 '<div class="new">',
5070                                                 @add,
5071                                                 '</div>',
5072                                         '</div>';
5073                         }
5074                         @rem = @add = ();
5075                 }
5076
5077                 ## adding lines to accumulator
5078                 # guardian value
5079                 last unless $line;
5080                 # rem, add or change
5081                 if ($class eq 'rem') {
5082                         push @rem, $line;
5083                 } elsif ($class eq 'add') {
5084                         push @add, $line;
5085                 }
5086                 # context line
5087                 if ($class eq 'ctx') {
5088                         push @ctx, $line;
5089                 }
5090         }
5091 }
5092
5093 sub git_patchset_body {
5094         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5095         my ($hash_parent) = $hash_parents[0];
5096
5097         my $is_combined = (@hash_parents > 1);
5098         my $patch_idx = 0;
5099         my $patch_number = 0;
5100         my $patch_line;
5101         my $diffinfo;
5102         my $to_name;
5103         my (%from, %to);
5104         my @chunk; # for side-by-side diff
5105
5106         print "<div class=\"patchset\">\n";
5107
5108         # skip to first patch
5109         while ($patch_line = <$fd>) {
5110                 chomp $patch_line;
5111
5112                 last if ($patch_line =~ m/^diff /);
5113         }
5114
5115  PATCH:
5116         while ($patch_line) {
5117
5118                 # parse "git diff" header line
5119                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5120                         # $1 is from_name, which we do not use
5121                         $to_name = unquote($2);
5122                         $to_name =~ s!^b/!!;
5123                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5124                         # $1 is 'cc' or 'combined', which we do not use
5125                         $to_name = unquote($2);
5126                 } else {
5127                         $to_name = undef;
5128                 }
5129
5130                 # check if current patch belong to current raw line
5131                 # and parse raw git-diff line if needed
5132                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5133                         # this is continuation of a split patch
5134                         print "<div class=\"patch cont\">\n";
5135                 } else {
5136                         # advance raw git-diff output if needed
5137                         $patch_idx++ if defined $diffinfo;
5138
5139                         # read and prepare patch information
5140                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5141
5142                         # compact combined diff output can have some patches skipped
5143                         # find which patch (using pathname of result) we are at now;
5144                         if ($is_combined) {
5145                                 while ($to_name ne $diffinfo->{'to_file'}) {
5146                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5147                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5148                                               "</div>\n";  # class="patch"
5149
5150                                         $patch_idx++;
5151                                         $patch_number++;
5152
5153                                         last if $patch_idx > $#$difftree;
5154                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5155                                 }
5156                         }
5157
5158                         # modifies %from, %to hashes
5159                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5160
5161                         # this is first patch for raw difftree line with $patch_idx index
5162                         # we index @$difftree array from 0, but number patches from 1
5163                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5164                 }
5165
5166                 # git diff header
5167                 #assert($patch_line =~ m/^diff /) if DEBUG;
5168                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5169                 $patch_number++;
5170                 # print "git diff" header
5171                 print format_git_diff_header_line($patch_line, $diffinfo,
5172                                                   \%from, \%to);
5173
5174                 # print extended diff header
5175                 print "<div class=\"diff extended_header\">\n";
5176         EXTENDED_HEADER:
5177                 while ($patch_line = <$fd>) {
5178                         chomp $patch_line;
5179
5180                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5181
5182                         print format_extended_diff_header_line($patch_line, $diffinfo,
5183                                                                \%from, \%to);
5184                 }
5185                 print "</div>\n"; # class="diff extended_header"
5186
5187                 # from-file/to-file diff header
5188                 if (! $patch_line) {
5189                         print "</div>\n"; # class="patch"
5190                         last PATCH;
5191                 }
5192                 next PATCH if ($patch_line =~ m/^diff /);
5193                 #assert($patch_line =~ m/^---/) if DEBUG;
5194
5195                 my $last_patch_line = $patch_line;
5196                 $patch_line = <$fd>;
5197                 chomp $patch_line;
5198                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5199
5200                 print format_diff_from_to_header($last_patch_line, $patch_line,
5201                                                  $diffinfo, \%from, \%to,
5202                                                  @hash_parents);
5203
5204                 # the patch itself
5205         LINE:
5206                 while ($patch_line = <$fd>) {
5207                         chomp $patch_line;
5208
5209                         next PATCH if ($patch_line =~ m/^diff /);
5210
5211                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5212                         my $diff_classes = "diff";
5213                         $diff_classes .= " $class" if ($class);
5214                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5215
5216                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5217                                 if ($class eq 'chunk_header') {
5218                                         print_sidebyside_diff_chunk(@chunk);
5219                                         @chunk = ( [ $class, $line ] );
5220                                 } else {
5221                                         push @chunk, [ $class, $line ];
5222                                 }
5223                         } else {
5224                                 # default 'inline' style and unknown styles
5225                                 print $line;
5226                         }
5227                 }
5228
5229         } continue {
5230                 if (@chunk) {
5231                         print_sidebyside_diff_chunk(@chunk);
5232                         @chunk = ();
5233                 }
5234                 print "</div>\n"; # class="patch"
5235         }
5236
5237         # for compact combined (--cc) format, with chunk and patch simplification
5238         # the patchset might be empty, but there might be unprocessed raw lines
5239         for (++$patch_idx if $patch_number > 0;
5240              $patch_idx < @$difftree;
5241              ++$patch_idx) {
5242                 # read and prepare patch information
5243                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5244
5245                 # generate anchor for "patch" links in difftree / whatchanged part
5246                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5247                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5248                       "</div>\n";  # class="patch"
5249
5250                 $patch_number++;
5251         }
5252
5253         if ($patch_number == 0) {
5254                 if (@hash_parents > 1) {
5255                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5256                 } else {
5257                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5258                 }
5259         }
5260
5261         print "</div>\n"; # class="patchset"
5262 }
5263
5264 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5265
5266 sub git_project_search_form {
5267         my ($searchtext, $search_use_regexp) = @_;
5268
5269         my $limit = '';
5270         if ($project_filter) {
5271                 $limit = " in '$project_filter/'";
5272         }
5273
5274         print "<div class=\"projsearch\">\n";
5275         print $cgi->startform(-method => 'get', -action => $my_uri) .
5276               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5277         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5278                 if (defined $project_filter);
5279         print $cgi->textfield(-name => 's', -value => $searchtext,
5280                               -title => "Search project by name and description$limit",
5281                               -size => 60) . "\n" .
5282               "<span title=\"Extended regular expression\">" .
5283               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5284                              -checked => $search_use_regexp) .
5285               "</span>\n" .
5286               $cgi->submit(-name => 'btnS', -value => 'Search') .
5287               $cgi->end_form() . "\n" .
5288               $cgi->a({-href => href(project => undef, searchtext => undef,
5289                                      project_filter => $project_filter)},
5290                       esc_html("List all projects$limit")) . "<br />\n";
5291         print "</div>\n";
5292 }
5293
5294 # entry for given @keys needs filling if at least one of keys in list
5295 # is not present in %$project_info
5296 sub project_info_needs_filling {
5297         my ($project_info, @keys) = @_;
5298
5299         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5300         foreach my $key (@keys) {
5301                 if (!exists $project_info->{$key}) {
5302                         return 1;
5303                 }
5304         }
5305         return;
5306 }
5307
5308 # fills project list info (age, description, owner, category, forks, etc.)
5309 # for each project in the list, removing invalid projects from
5310 # returned list, or fill only specified info.
5311 #
5312 # Invalid projects are removed from the returned list if and only if you
5313 # ask 'age' or 'age_string' to be filled, because they are the only fields
5314 # that run unconditionally git command that requires repository, and
5315 # therefore do always check if project repository is invalid.
5316 #
5317 # USAGE:
5318 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5319 #   ensures that 'descr_long' and 'ctags' fields are filled
5320 # * @project_list = fill_project_list_info(\@project_list)
5321 #   ensures that all fields are filled (and invalid projects removed)
5322 #
5323 # NOTE: modifies $projlist, but does not remove entries from it
5324 sub fill_project_list_info {
5325         my ($projlist, @wanted_keys) = @_;
5326         my @projects;
5327         my $filter_set = sub { return @_; };
5328         if (@wanted_keys) {
5329                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5330                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5331         }
5332
5333         my $show_ctags = gitweb_check_feature('ctags');
5334  PROJECT:
5335         foreach my $pr (@$projlist) {
5336                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5337                         my (@activity) = git_get_last_activity($pr->{'path'});
5338                         unless (@activity) {
5339                                 next PROJECT;
5340                         }
5341                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5342                 }
5343                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5344                         my $descr = git_get_project_description($pr->{'path'}) || "";
5345                         $descr = to_utf8($descr);
5346                         $pr->{'descr_long'} = $descr;
5347                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5348                 }
5349                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5350                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5351                 }
5352                 if ($show_ctags &&
5353                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5354                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5355                 }
5356                 if ($projects_list_group_categories &&
5357                     project_info_needs_filling($pr, $filter_set->('category'))) {
5358                         my $cat = git_get_project_category($pr->{'path'}) ||
5359                                                            $project_list_default_category;
5360                         $pr->{'category'} = to_utf8($cat);
5361                 }
5362
5363                 push @projects, $pr;
5364         }
5365
5366         return @projects;
5367 }
5368
5369 sub sort_projects_list {
5370         my ($projlist, $order) = @_;
5371         my @projects;
5372
5373         my %order_info = (
5374                 project => { key => 'path', type => 'str' },
5375                 descr => { key => 'descr_long', type => 'str' },
5376                 owner => { key => 'owner', type => 'str' },
5377                 age => { key => 'age', type => 'num' }
5378         );
5379         my $oi = $order_info{$order};
5380         return @$projlist unless defined $oi;
5381         if ($oi->{'type'} eq 'str') {
5382                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5383         } else {
5384                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5385         }
5386
5387         return @projects;
5388 }
5389
5390 # returns a hash of categories, containing the list of project
5391 # belonging to each category
5392 sub build_projlist_by_category {
5393         my ($projlist, $from, $to) = @_;
5394         my %categories;
5395
5396         $from = 0 unless defined $from;
5397         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5398
5399         for (my $i = $from; $i <= $to; $i++) {
5400                 my $pr = $projlist->[$i];
5401                 push @{$categories{ $pr->{'category'} }}, $pr;
5402         }
5403
5404         return wantarray ? %categories : \%categories;
5405 }
5406
5407 # print 'sort by' <th> element, generating 'sort by $name' replay link
5408 # if that order is not selected
5409 sub print_sort_th {
5410         print format_sort_th(@_);
5411 }
5412
5413 sub format_sort_th {
5414         my ($name, $order, $header) = @_;
5415         my $sort_th = "";
5416         $header ||= ucfirst($name);
5417
5418         if ($order eq $name) {
5419                 $sort_th .= "<th>$header</th>\n";
5420         } else {
5421                 $sort_th .= "<th>" .
5422                             $cgi->a({-href => href(-replay=>1, order=>$name),
5423                                      -class => "header"}, $header) .
5424                             "</th>\n";
5425         }
5426
5427         return $sort_th;
5428 }
5429
5430 sub git_project_list_rows {
5431         my ($projlist, $from, $to, $check_forks) = @_;
5432
5433         $from = 0 unless defined $from;
5434         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5435
5436         my $alternate = 1;
5437         for (my $i = $from; $i <= $to; $i++) {
5438                 my $pr = $projlist->[$i];
5439
5440                 if ($alternate) {
5441                         print "<tr class=\"dark\">\n";
5442                 } else {
5443                         print "<tr class=\"light\">\n";
5444                 }
5445                 $alternate ^= 1;
5446
5447                 if ($check_forks) {
5448                         print "<td>";
5449                         if ($pr->{'forks'}) {
5450                                 my $nforks = scalar @{$pr->{'forks'}};
5451                                 if ($nforks > 0) {
5452                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5453                                                        -title => "$nforks forks"}, "+");
5454                                 } else {
5455                                         print $cgi->span({-title => "$nforks forks"}, "+");
5456                                 }
5457                         }
5458                         print "</td>\n";
5459                 }
5460                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5461                                         -class => "list"},
5462                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5463                       "</td>\n" .
5464                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5465                                         -class => "list",
5466                                         -title => $pr->{'descr_long'}},
5467                                         $search_regexp
5468                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5469                                                                     $pr->{'descr'}, $search_regexp)
5470                                         : esc_html($pr->{'descr'})) .
5471                       "</td>\n";
5472                 unless ($omit_owner) {
5473                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5474                 }
5475                 unless ($omit_age_column) {
5476                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5477                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5478                 }
5479                 print"<td class=\"link\">" .
5480                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5481                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5482                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5483                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5484                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5485                       "</td>\n" .
5486                       "</tr>\n";
5487         }
5488 }
5489
5490 sub git_project_list_body {
5491         # actually uses global variable $project
5492         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5493         my @projects = @$projlist;
5494
5495         my $check_forks = gitweb_check_feature('forks');
5496         my $show_ctags  = gitweb_check_feature('ctags');
5497         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5498         $check_forks = undef
5499                 if ($tagfilter || $search_regexp);
5500
5501         # filtering out forks before filling info allows to do less work
5502         @projects = filter_forks_from_projects_list(\@projects)
5503                 if ($check_forks);
5504         # search_projects_list pre-fills required info
5505         @projects = search_projects_list(\@projects,
5506                                          'search_regexp' => $search_regexp,
5507                                          'tagfilter'  => $tagfilter)
5508                 if ($tagfilter || $search_regexp);
5509         # fill the rest
5510         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5511         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5512         push @all_fields, 'owner' unless($omit_owner);
5513         @projects = fill_project_list_info(\@projects, @all_fields);
5514
5515         $order ||= $default_projects_order;
5516         $from = 0 unless defined $from;
5517         $to = $#projects if (!defined $to || $#projects < $to);
5518
5519         # short circuit
5520         if ($from > $to) {
5521                 print "<center>\n".
5522                       "<b>No such projects found</b><br />\n".
5523                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5524                       "</center>\n<br />\n";
5525                 return;
5526         }
5527
5528         @projects = sort_projects_list(\@projects, $order);
5529
5530         if ($show_ctags) {
5531                 my $ctags = git_gather_all_ctags(\@projects);
5532                 my $cloud = git_populate_project_tagcloud($ctags);
5533                 print git_show_project_tagcloud($cloud, 64);
5534         }
5535
5536         print "<table class=\"project_list\">\n";
5537         unless ($no_header) {
5538                 print "<tr>\n";
5539                 if ($check_forks) {
5540                         print "<th></th>\n";
5541                 }
5542                 print_sort_th('project', $order, 'Project');
5543                 print_sort_th('descr', $order, 'Description');
5544                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5545                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5546                 print "<th></th>\n" . # for links
5547                       "</tr>\n";
5548         }
5549
5550         if ($projects_list_group_categories) {
5551                 # only display categories with projects in the $from-$to window
5552                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5553                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5554                 foreach my $cat (sort keys %categories) {
5555                         unless ($cat eq "") {
5556                                 print "<tr>\n";
5557                                 if ($check_forks) {
5558                                         print "<td></td>\n";
5559                                 }
5560                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5561                                 print "</tr>\n";
5562                         }
5563
5564                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5565                 }
5566         } else {
5567                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5568         }
5569
5570         if (defined $extra) {
5571                 print "<tr>\n";
5572                 if ($check_forks) {
5573                         print "<td></td>\n";
5574                 }
5575                 print "<td colspan=\"5\">$extra</td>\n" .
5576                       "</tr>\n";
5577         }
5578         print "</table>\n";
5579 }
5580
5581 sub git_log_body {
5582         # uses global variable $project
5583         my ($commitlist, $from, $to, $refs, $extra) = @_;
5584
5585         $from = 0 unless defined $from;
5586         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5587
5588         for (my $i = 0; $i <= $to; $i++) {
5589                 my %co = %{$commitlist->[$i]};
5590                 next if !%co;
5591                 my $commit = $co{'id'};
5592                 my $ref = format_ref_marker($refs, $commit);
5593                 git_print_header_div('commit',
5594                                "<span class=\"age\">$co{'age_string'}</span>" .
5595                                esc_html($co{'title'}) . $ref,
5596                                $commit);
5597                 print "<div class=\"title_text\">\n" .
5598                       "<div class=\"log_link\">\n" .
5599                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5600                       " | " .
5601                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5602                       " | " .
5603                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5604                       "<br/>\n" .
5605                       "</div>\n";
5606                       git_print_authorship(\%co, -tag => 'span');
5607                       print "<br/>\n</div>\n";
5608
5609                 print "<div class=\"log_body\">\n";
5610                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5611                 print "</div>\n";
5612         }
5613         if ($extra) {
5614                 print "<div class=\"page_nav\">\n";
5615                 print "$extra\n";
5616                 print "</div>\n";
5617         }
5618 }
5619
5620 sub git_shortlog_body {
5621         # uses global variable $project
5622         my ($commitlist, $from, $to, $refs, $extra) = @_;
5623
5624         $from = 0 unless defined $from;
5625         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5626
5627         print "<table class=\"shortlog\">\n";
5628         my $alternate = 1;
5629         for (my $i = $from; $i <= $to; $i++) {
5630                 my %co = %{$commitlist->[$i]};
5631                 my $commit = $co{'id'};
5632                 my $ref = format_ref_marker($refs, $commit);
5633                 if ($alternate) {
5634                         print "<tr class=\"dark\">\n";
5635                 } else {
5636                         print "<tr class=\"light\">\n";
5637                 }
5638                 $alternate ^= 1;
5639                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5640                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5641                       format_author_html('td', \%co, 10) . "<td>";
5642                 print format_subject_html($co{'title'}, $co{'title_short'},
5643                                           href(action=>"commit", hash=>$commit), $ref);
5644                 print "</td>\n" .
5645                       "<td class=\"link\">" .
5646                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5647                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5648                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5649                 my $snapshot_links = format_snapshot_links($commit);
5650                 if (defined $snapshot_links) {
5651                         print " | " . $snapshot_links;
5652                 }
5653                 print "</td>\n" .
5654                       "</tr>\n";
5655         }
5656         if (defined $extra) {
5657                 print "<tr>\n" .
5658                       "<td colspan=\"4\">$extra</td>\n" .
5659                       "</tr>\n";
5660         }
5661         print "</table>\n";
5662 }
5663
5664 sub git_history_body {
5665         # Warning: assumes constant type (blob or tree) during history
5666         my ($commitlist, $from, $to, $refs, $extra,
5667             $file_name, $file_hash, $ftype) = @_;
5668
5669         $from = 0 unless defined $from;
5670         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5671
5672         print "<table class=\"history\">\n";
5673         my $alternate = 1;
5674         for (my $i = $from; $i <= $to; $i++) {
5675                 my %co = %{$commitlist->[$i]};
5676                 if (!%co) {
5677                         next;
5678                 }
5679                 my $commit = $co{'id'};
5680
5681                 my $ref = format_ref_marker($refs, $commit);
5682
5683                 if ($alternate) {
5684                         print "<tr class=\"dark\">\n";
5685                 } else {
5686                         print "<tr class=\"light\">\n";
5687                 }
5688                 $alternate ^= 1;
5689                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5690         # shortlog:   format_author_html('td', \%co, 10)
5691                       format_author_html('td', \%co, 15, 3) . "<td>";
5692                 # originally git_history used chop_str($co{'title'}, 50)
5693                 print format_subject_html($co{'title'}, $co{'title_short'},
5694                                           href(action=>"commit", hash=>$commit), $ref);
5695                 print "</td>\n" .
5696                       "<td class=\"link\">" .
5697                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5698                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5699
5700                 if ($ftype eq 'blob') {
5701                         my $blob_current = $file_hash;
5702                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5703                         if (defined $blob_current && defined $blob_parent &&
5704                                         $blob_current ne $blob_parent) {
5705                                 print " | " .
5706                                         $cgi->a({-href => href(action=>"blobdiff",
5707                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5708                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5709                                                                file_name=>$file_name)},
5710                                                 "diff to current");
5711                         }
5712                 }
5713                 print "</td>\n" .
5714                       "</tr>\n";
5715         }
5716         if (defined $extra) {
5717                 print "<tr>\n" .
5718                       "<td colspan=\"4\">$extra</td>\n" .
5719                       "</tr>\n";
5720         }
5721         print "</table>\n";
5722 }
5723
5724 sub git_tags_body {
5725         # uses global variable $project
5726         my ($taglist, $from, $to, $extra) = @_;
5727         $from = 0 unless defined $from;
5728         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5729
5730         print "<table class=\"tags\">\n";
5731         my $alternate = 1;
5732         for (my $i = $from; $i <= $to; $i++) {
5733                 my $entry = $taglist->[$i];
5734                 my %tag = %$entry;
5735                 my $comment = $tag{'subject'};
5736                 my $comment_short;
5737                 if (defined $comment) {
5738                         $comment_short = chop_str($comment, 30, 5);
5739                 }
5740                 if ($alternate) {
5741                         print "<tr class=\"dark\">\n";
5742                 } else {
5743                         print "<tr class=\"light\">\n";
5744                 }
5745                 $alternate ^= 1;
5746                 if (defined $tag{'age'}) {
5747                         print "<td><i>$tag{'age'}</i></td>\n";
5748                 } else {
5749                         print "<td></td>\n";
5750                 }
5751                 print "<td>" .
5752                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5753                                -class => "list name"}, esc_html($tag{'name'})) .
5754                       "</td>\n" .
5755                       "<td>";
5756                 if (defined $comment) {
5757                         print format_subject_html($comment, $comment_short,
5758                                                   href(action=>"tag", hash=>$tag{'id'}));
5759                 }
5760                 print "</td>\n" .
5761                       "<td class=\"selflink\">";
5762                 if ($tag{'type'} eq "tag") {
5763                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5764                 } else {
5765                         print "&nbsp;";
5766                 }
5767                 print "</td>\n" .
5768                       "<td class=\"link\">" . " | " .
5769                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5770                 if ($tag{'reftype'} eq "commit") {
5771                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5772                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5773                 } elsif ($tag{'reftype'} eq "blob") {
5774                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5775                 }
5776                 print "</td>\n" .
5777                       "</tr>";
5778         }
5779         if (defined $extra) {
5780                 print "<tr>\n" .
5781                       "<td colspan=\"5\">$extra</td>\n" .
5782                       "</tr>\n";
5783         }
5784         print "</table>\n";
5785 }
5786
5787 sub git_heads_body {
5788         # uses global variable $project
5789         my ($headlist, $head_at, $from, $to, $extra) = @_;
5790         $from = 0 unless defined $from;
5791         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5792
5793         print "<table class=\"heads\">\n";
5794         my $alternate = 1;
5795         for (my $i = $from; $i <= $to; $i++) {
5796                 my $entry = $headlist->[$i];
5797                 my %ref = %$entry;
5798                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5799                 if ($alternate) {
5800                         print "<tr class=\"dark\">\n";
5801                 } else {
5802                         print "<tr class=\"light\">\n";
5803                 }
5804                 $alternate ^= 1;
5805                 print "<td><i>$ref{'age'}</i></td>\n" .
5806                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5807                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5808                                -class => "list name"},esc_html($ref{'name'})) .
5809                       "</td>\n" .
5810                       "<td class=\"link\">" .
5811                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5812                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5813                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5814                       "</td>\n" .
5815                       "</tr>";
5816         }
5817         if (defined $extra) {
5818                 print "<tr>\n" .
5819                       "<td colspan=\"3\">$extra</td>\n" .
5820                       "</tr>\n";
5821         }
5822         print "</table>\n";
5823 }
5824
5825 # Display a single remote block
5826 sub git_remote_block {
5827         my ($remote, $rdata, $limit, $head) = @_;
5828
5829         my $heads = $rdata->{'heads'};
5830         my $fetch = $rdata->{'fetch'};
5831         my $push = $rdata->{'push'};
5832
5833         my $urls_table = "<table class=\"projects_list\">\n" ;
5834
5835         if (defined $fetch) {
5836                 if ($fetch eq $push) {
5837                         $urls_table .= format_repo_url("URL", $fetch);
5838                 } else {
5839                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5840                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5841                 }
5842         } elsif (defined $push) {
5843                 $urls_table .= format_repo_url("Push URL", $push);
5844         } else {
5845                 $urls_table .= format_repo_url("", "No remote URL");
5846         }
5847
5848         $urls_table .= "</table>\n";
5849
5850         my $dots;
5851         if (defined $limit && $limit < @$heads) {
5852                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5853         }
5854
5855         print $urls_table;
5856         git_heads_body($heads, $head, 0, $limit, $dots);
5857 }
5858
5859 # Display a list of remote names with the respective fetch and push URLs
5860 sub git_remotes_list {
5861         my ($remotedata, $limit) = @_;
5862         print "<table class=\"heads\">\n";
5863         my $alternate = 1;
5864         my @remotes = sort keys %$remotedata;
5865
5866         my $limited = $limit && $limit < @remotes;
5867
5868         $#remotes = $limit - 1 if $limited;
5869
5870         while (my $remote = shift @remotes) {
5871                 my $rdata = $remotedata->{$remote};
5872                 my $fetch = $rdata->{'fetch'};
5873                 my $push = $rdata->{'push'};
5874                 if ($alternate) {
5875                         print "<tr class=\"dark\">\n";
5876                 } else {
5877                         print "<tr class=\"light\">\n";
5878                 }
5879                 $alternate ^= 1;
5880                 print "<td>" .
5881                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5882                                -class=> "list name"},esc_html($remote)) .
5883                       "</td>";
5884                 print "<td class=\"link\">" .
5885                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5886                       " | " .
5887                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5888                       "</td>";
5889
5890                 print "</tr>\n";
5891         }
5892
5893         if ($limited) {
5894                 print "<tr>\n" .
5895                       "<td colspan=\"3\">" .
5896                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5897                       "</td>\n" . "</tr>\n";
5898         }
5899
5900         print "</table>";
5901 }
5902
5903 # Display remote heads grouped by remote, unless there are too many
5904 # remotes, in which case we only display the remote names
5905 sub git_remotes_body {
5906         my ($remotedata, $limit, $head) = @_;
5907         if ($limit and $limit < keys %$remotedata) {
5908                 git_remotes_list($remotedata, $limit);
5909         } else {
5910                 fill_remote_heads($remotedata);
5911                 while (my ($remote, $rdata) = each %$remotedata) {
5912                         git_print_section({-class=>"remote", -id=>$remote},
5913                                 ["remotes", $remote, $remote], sub {
5914                                         git_remote_block($remote, $rdata, $limit, $head);
5915                                 });
5916                 }
5917         }
5918 }
5919
5920 sub git_search_message {
5921         my %co = @_;
5922
5923         my $greptype;
5924         if ($searchtype eq 'commit') {
5925                 $greptype = "--grep=";
5926         } elsif ($searchtype eq 'author') {
5927                 $greptype = "--author=";
5928         } elsif ($searchtype eq 'committer') {
5929                 $greptype = "--committer=";
5930         }
5931         $greptype .= $searchtext;
5932         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5933                                        $greptype, '--regexp-ignore-case',
5934                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5935
5936         my $paging_nav = '';
5937         if ($page > 0) {
5938                 $paging_nav .=
5939                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5940                                 "first") .
5941                         " &sdot; " .
5942                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5943                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5944         } else {
5945                 $paging_nav .= "first &sdot; prev";
5946         }
5947         my $next_link = '';
5948         if ($#commitlist >= 100) {
5949                 $next_link =
5950                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5951                                  -accesskey => "n", -title => "Alt-n"}, "next");
5952                 $paging_nav .= " &sdot; $next_link";
5953         } else {
5954                 $paging_nav .= " &sdot; next";
5955         }
5956
5957         git_header_html();
5958
5959         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5960         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5961         if ($page == 0 && !@commitlist) {
5962                 print "<p>No match.</p>\n";
5963         } else {
5964                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5965         }
5966
5967         git_footer_html();
5968 }
5969
5970 sub git_search_changes {
5971         my %co = @_;
5972
5973         local $/ = "\n";
5974         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5975                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5976                 ($search_use_regexp ? '--pickaxe-regex' : ())
5977                         or die_error(500, "Open git-log failed");
5978
5979         git_header_html();
5980
5981         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5982         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5983
5984         print "<table class=\"pickaxe search\">\n";
5985         my $alternate = 1;
5986         undef %co;
5987         my @files;
5988         while (my $line = <$fd>) {
5989                 chomp $line;
5990                 next unless $line;
5991
5992                 my %set = parse_difftree_raw_line($line);
5993                 if (defined $set{'commit'}) {
5994                         # finish previous commit
5995                         if (%co) {
5996                                 print "</td>\n" .
5997                                       "<td class=\"link\">" .
5998                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5999                                               "commit") .
6000                                       " | " .
6001                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6002                                                              hash_base=>$co{'id'})},
6003                                               "tree") .
6004                                       "</td>\n" .
6005                                       "</tr>\n";
6006                         }
6007
6008                         if ($alternate) {
6009                                 print "<tr class=\"dark\">\n";
6010                         } else {
6011                                 print "<tr class=\"light\">\n";
6012                         }
6013                         $alternate ^= 1;
6014                         %co = parse_commit($set{'commit'});
6015                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6016                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6017                               "<td><i>$author</i></td>\n" .
6018                               "<td>" .
6019                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6020                                       -class => "list subject"},
6021                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6022                 } elsif (defined $set{'to_id'}) {
6023                         next if ($set{'to_id'} =~ m/^0{40}$/);
6024
6025                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6026                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6027                                       -class => "list"},
6028                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6029                               "<br/>\n";
6030                 }
6031         }
6032         close $fd;
6033
6034         # finish last commit (warning: repetition!)
6035         if (%co) {
6036                 print "</td>\n" .
6037                       "<td class=\"link\">" .
6038                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6039                               "commit") .
6040                       " | " .
6041                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6042                                              hash_base=>$co{'id'})},
6043                               "tree") .
6044                       "</td>\n" .
6045                       "</tr>\n";
6046         }
6047
6048         print "</table>\n";
6049
6050         git_footer_html();
6051 }
6052
6053 sub git_search_files {
6054         my %co = @_;
6055
6056         local $/ = "\n";
6057         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6058                 $search_use_regexp ? ('-E', '-i') : '-F',
6059                 $searchtext, $co{'tree'}
6060                         or die_error(500, "Open git-grep failed");
6061
6062         git_header_html();
6063
6064         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6065         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6066
6067         print "<table class=\"grep_search\">\n";
6068         my $alternate = 1;
6069         my $matches = 0;
6070         my $lastfile = '';
6071         my $file_href;
6072         while (my $line = <$fd>) {
6073                 chomp $line;
6074                 my ($file, $lno, $ltext, $binary);
6075                 last if ($matches++ > 1000);
6076                 if ($line =~ /^Binary file (.+) matches$/) {
6077                         $file = $1;
6078                         $binary = 1;
6079                 } else {
6080                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6081                         $file =~ s/^$co{'tree'}://;
6082                 }
6083                 if ($file ne $lastfile) {
6084                         $lastfile and print "</td></tr>\n";
6085                         if ($alternate++) {
6086                                 print "<tr class=\"dark\">\n";
6087                         } else {
6088                                 print "<tr class=\"light\">\n";
6089                         }
6090                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6091                                           file_name=>$file);
6092                         print "<td class=\"list\">".
6093                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6094                         print "</td><td>\n";
6095                         $lastfile = $file;
6096                 }
6097                 if ($binary) {
6098                         print "<div class=\"binary\">Binary file</div>\n";
6099                 } else {
6100                         $ltext = untabify($ltext);
6101                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6102                                 $ltext = esc_html($1, -nbsp=>1);
6103                                 $ltext .= '<span class="match">';
6104                                 $ltext .= esc_html($2, -nbsp=>1);
6105                                 $ltext .= '</span>';
6106                                 $ltext .= esc_html($3, -nbsp=>1);
6107                         } else {
6108                                 $ltext = esc_html($ltext, -nbsp=>1);
6109                         }
6110                         print "<div class=\"pre\">" .
6111                                 $cgi->a({-href => $file_href.'#l'.$lno,
6112                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6113                                 ' ' .  $ltext . "</div>\n";
6114                 }
6115         }
6116         if ($lastfile) {
6117                 print "</td></tr>\n";
6118                 if ($matches > 1000) {
6119                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6120                 }
6121         } else {
6122                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6123         }
6124         close $fd;
6125
6126         print "</table>\n";
6127
6128         git_footer_html();
6129 }
6130
6131 sub git_search_grep_body {
6132         my ($commitlist, $from, $to, $extra) = @_;
6133         $from = 0 unless defined $from;
6134         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6135
6136         print "<table class=\"commit_search\">\n";
6137         my $alternate = 1;
6138         for (my $i = $from; $i <= $to; $i++) {
6139                 my %co = %{$commitlist->[$i]};
6140                 if (!%co) {
6141                         next;
6142                 }
6143                 my $commit = $co{'id'};
6144                 if ($alternate) {
6145                         print "<tr class=\"dark\">\n";
6146                 } else {
6147                         print "<tr class=\"light\">\n";
6148                 }
6149                 $alternate ^= 1;
6150                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6151                       format_author_html('td', \%co, 15, 5) .
6152                       "<td>" .
6153                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6154                                -class => "list subject"},
6155                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6156                 my $comment = $co{'comment'};
6157                 foreach my $line (@$comment) {
6158                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6159                                 my ($lead, $match, $trail) = ($1, $2, $3);
6160                                 $match = chop_str($match, 70, 5, 'center');
6161                                 my $contextlen = int((80 - length($match))/2);
6162                                 $contextlen = 30 if ($contextlen > 30);
6163                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6164                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6165
6166                                 $lead  = esc_html($lead);
6167                                 $match = esc_html($match);
6168                                 $trail = esc_html($trail);
6169
6170                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6171                         }
6172                 }
6173                 print "</td>\n" .
6174                       "<td class=\"link\">" .
6175                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6176                       " | " .
6177                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6178                       " | " .
6179                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6180                 print "</td>\n" .
6181                       "</tr>\n";
6182         }
6183         if (defined $extra) {
6184                 print "<tr>\n" .
6185                       "<td colspan=\"3\">$extra</td>\n" .
6186                       "</tr>\n";
6187         }
6188         print "</table>\n";
6189 }
6190
6191 ## ======================================================================
6192 ## ======================================================================
6193 ## actions
6194
6195 sub git_project_list {
6196         my $order = $input_params{'order'};
6197         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6198                 die_error(400, "Unknown order parameter");
6199         }
6200
6201         my @list = git_get_projects_list($project_filter, $strict_export);
6202         if (!@list) {
6203                 die_error(404, "No projects found");
6204         }
6205
6206         git_header_html();
6207         if (defined $home_text && -f $home_text) {
6208                 print "<div class=\"index_include\">\n";
6209                 insert_file($home_text);
6210                 print "</div>\n";
6211         }
6212
6213         git_project_search_form($searchtext, $search_use_regexp);
6214         git_project_list_body(\@list, $order);
6215         git_footer_html();
6216 }
6217
6218 sub git_forks {
6219         my $order = $input_params{'order'};
6220         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6221                 die_error(400, "Unknown order parameter");
6222         }
6223
6224         my $filter = $project;
6225         $filter =~ s/\.git$//;
6226         my @list = git_get_projects_list($filter);
6227         if (!@list) {
6228                 die_error(404, "No forks found");
6229         }
6230
6231         git_header_html();
6232         git_print_page_nav('','');
6233         git_print_header_div('summary', "$project forks");
6234         git_project_list_body(\@list, $order);
6235         git_footer_html();
6236 }
6237
6238 sub git_project_index {
6239         my @projects = git_get_projects_list($project_filter, $strict_export);
6240         if (!@projects) {
6241                 die_error(404, "No projects found");
6242         }
6243
6244         print $cgi->header(
6245                 -type => 'text/plain',
6246                 -charset => 'utf-8',
6247                 -content_disposition => 'inline; filename="index.aux"');
6248
6249         foreach my $pr (@projects) {
6250                 if (!exists $pr->{'owner'}) {
6251                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6252                 }
6253
6254                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6255                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6256                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6257                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6258                 $path  =~ s/ /\+/g;
6259                 $owner =~ s/ /\+/g;
6260
6261                 print "$path $owner\n";
6262         }
6263 }
6264
6265 sub git_summary {
6266         my $descr = git_get_project_description($project) || "none";
6267         my %co = parse_commit("HEAD");
6268         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6269         my $head = $co{'id'};
6270         my $remote_heads = gitweb_check_feature('remote_heads');
6271
6272         my $owner = git_get_project_owner($project);
6273
6274         my $refs = git_get_references();
6275         # These get_*_list functions return one more to allow us to see if
6276         # there are more ...
6277         my @taglist  = git_get_tags_list(16);
6278         my @headlist = git_get_heads_list(16);
6279         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6280         my @forklist;
6281         my $check_forks = gitweb_check_feature('forks');
6282
6283         if ($check_forks) {
6284                 # find forks of a project
6285                 my $filter = $project;
6286                 $filter =~ s/\.git$//;
6287                 @forklist = git_get_projects_list($filter);
6288                 # filter out forks of forks
6289                 @forklist = filter_forks_from_projects_list(\@forklist)
6290                         if (@forklist);
6291         }
6292
6293         git_header_html();
6294         git_print_page_nav('summary','', $head);
6295
6296         print "<div class=\"title\">&nbsp;</div>\n";
6297         print "<table class=\"projects_list\">\n" .
6298               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6299         unless ($omit_owner) {
6300                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6301         }
6302         if (defined $cd{'rfc2822'}) {
6303                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6304                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6305         }
6306
6307         # use per project git URL list in $projectroot/$project/cloneurl
6308         # or make project git URL from git base URL and project name
6309         my $url_tag = "URL";
6310         my @url_list = git_get_project_url_list($project);
6311         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6312         foreach my $git_url (@url_list) {
6313                 next unless $git_url;
6314                 print format_repo_url($url_tag, $git_url);
6315                 $url_tag = "";
6316         }
6317
6318         # Tag cloud
6319         my $show_ctags = gitweb_check_feature('ctags');
6320         if ($show_ctags) {
6321                 my $ctags = git_get_project_ctags($project);
6322                 if (%$ctags) {
6323                         # without ability to add tags, don't show if there are none
6324                         my $cloud = git_populate_project_tagcloud($ctags);
6325                         print "<tr id=\"metadata_ctags\">" .
6326                               "<td>content tags</td>" .
6327                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6328                               "</tr>\n";
6329                 }
6330         }
6331
6332         print "</table>\n";
6333
6334         # If XSS prevention is on, we don't include README.html.
6335         # TODO: Allow a readme in some safe format.
6336         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6337                 print "<div class=\"title\">readme</div>\n" .
6338                       "<div class=\"readme\">\n";
6339                 insert_file("$projectroot/$project/README.html");
6340                 print "\n</div>\n"; # class="readme"
6341         }
6342
6343         # we need to request one more than 16 (0..15) to check if
6344         # those 16 are all
6345         my @commitlist = $head ? parse_commits($head, 17) : ();
6346         if (@commitlist) {
6347                 git_print_header_div('shortlog');
6348                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6349                                   $#commitlist <=  15 ? undef :
6350                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6351         }
6352
6353         if (@taglist) {
6354                 git_print_header_div('tags');
6355                 git_tags_body(\@taglist, 0, 15,
6356                               $#taglist <=  15 ? undef :
6357                               $cgi->a({-href => href(action=>"tags")}, "..."));
6358         }
6359
6360         if (@headlist) {
6361                 git_print_header_div('heads');
6362                 git_heads_body(\@headlist, $head, 0, 15,
6363                                $#headlist <= 15 ? undef :
6364                                $cgi->a({-href => href(action=>"heads")}, "..."));
6365         }
6366
6367         if (%remotedata) {
6368                 git_print_header_div('remotes');
6369                 git_remotes_body(\%remotedata, 15, $head);
6370         }
6371
6372         if (@forklist) {
6373                 git_print_header_div('forks');
6374                 git_project_list_body(\@forklist, 'age', 0, 15,
6375                                       $#forklist <= 15 ? undef :
6376                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6377                                       'no_header');
6378         }
6379
6380         git_footer_html();
6381 }
6382
6383 sub git_tag {
6384         my %tag = parse_tag($hash);
6385
6386         if (! %tag) {
6387                 die_error(404, "Unknown tag object");
6388         }
6389
6390         my $head = git_get_head_hash($project);
6391         git_header_html();
6392         git_print_page_nav('','', $head,undef,$head);
6393         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6394         print "<div class=\"title_text\">\n" .
6395               "<table class=\"object_header\">\n" .
6396               "<tr>\n" .
6397               "<td>object</td>\n" .
6398               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6399                                $tag{'object'}) . "</td>\n" .
6400               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6401                                               $tag{'type'}) . "</td>\n" .
6402               "</tr>\n";
6403         if (defined($tag{'author'})) {
6404                 git_print_authorship_rows(\%tag, 'author');
6405         }
6406         print "</table>\n\n" .
6407               "</div>\n";
6408         print "<div class=\"page_body\">";
6409         my $comment = $tag{'comment'};
6410         foreach my $line (@$comment) {
6411                 chomp $line;
6412                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6413         }
6414         print "</div>\n";
6415         git_footer_html();
6416 }
6417
6418 sub git_blame_common {
6419         my $format = shift || 'porcelain';
6420         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6421                 $format = 'incremental';
6422                 $action = 'blame_incremental'; # for page title etc
6423         }
6424
6425         # permissions
6426         gitweb_check_feature('blame')
6427                 or die_error(403, "Blame view not allowed");
6428
6429         # error checking
6430         die_error(400, "No file name given") unless $file_name;
6431         $hash_base ||= git_get_head_hash($project);
6432         die_error(404, "Couldn't find base commit") unless $hash_base;
6433         my %co = parse_commit($hash_base)
6434                 or die_error(404, "Commit not found");
6435         my $ftype = "blob";
6436         if (!defined $hash) {
6437                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6438                         or die_error(404, "Error looking up file");
6439         } else {
6440                 $ftype = git_get_type($hash);
6441                 if ($ftype !~ "blob") {
6442                         die_error(400, "Object is not a blob");
6443                 }
6444         }
6445
6446         my $fd;
6447         if ($format eq 'incremental') {
6448                 # get file contents (as base)
6449                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6450                         or die_error(500, "Open git-cat-file failed");
6451         } elsif ($format eq 'data') {
6452                 # run git-blame --incremental
6453                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6454                         $hash_base, "--", $file_name
6455                         or die_error(500, "Open git-blame --incremental failed");
6456         } else {
6457                 # run git-blame --porcelain
6458                 open $fd, "-|", git_cmd(), "blame", '-p',
6459                         $hash_base, '--', $file_name
6460                         or die_error(500, "Open git-blame --porcelain failed");
6461         }
6462
6463         # incremental blame data returns early
6464         if ($format eq 'data') {
6465                 print $cgi->header(
6466                         -type=>"text/plain", -charset => "utf-8",
6467                         -status=> "200 OK");
6468                 local $| = 1; # output autoflush
6469                 while (my $line = <$fd>) {
6470                         print to_utf8($line);
6471                 }
6472                 close $fd
6473                         or print "ERROR $!\n";
6474
6475                 print 'END';
6476                 if (defined $t0 && gitweb_check_feature('timed')) {
6477                         print ' '.
6478                               tv_interval($t0, [ gettimeofday() ]).
6479                               ' '.$number_of_git_cmds;
6480                 }
6481                 print "\n";
6482
6483                 return;
6484         }
6485
6486         # page header
6487         git_header_html();
6488         my $formats_nav =
6489                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6490                         "blob") .
6491                 " | ";
6492         if ($format eq 'incremental') {
6493                 $formats_nav .=
6494                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6495                                 "blame") . " (non-incremental)";
6496         } else {
6497                 $formats_nav .=
6498                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6499                                 "blame") . " (incremental)";
6500         }
6501         $formats_nav .=
6502                 " | " .
6503                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6504                         "history") .
6505                 " | " .
6506                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6507                         "HEAD");
6508         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6509         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6510         git_print_page_path($file_name, $ftype, $hash_base);
6511
6512         # page body
6513         if ($format eq 'incremental') {
6514                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6515                       "This page requires JavaScript to run.\n Use ".
6516                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6517                               'this page').
6518                       " instead.\n".
6519                       "</b></center></div>\n</noscript>\n";
6520
6521                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6522         }
6523
6524         print qq!<div class="page_body">\n!;
6525         print qq!<div id="progress_info">... / ...</div>\n!
6526                 if ($format eq 'incremental');
6527         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6528               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6529               qq!<thead>\n!.
6530               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6531               qq!</thead>\n!.
6532               qq!<tbody>\n!;
6533
6534         my @rev_color = qw(light dark);
6535         my $num_colors = scalar(@rev_color);
6536         my $current_color = 0;
6537
6538         if ($format eq 'incremental') {
6539                 my $color_class = $rev_color[$current_color];
6540
6541                 #contents of a file
6542                 my $linenr = 0;
6543         LINE:
6544                 while (my $line = <$fd>) {
6545                         chomp $line;
6546                         $linenr++;
6547
6548                         print qq!<tr id="l$linenr" class="$color_class">!.
6549                               qq!<td class="sha1"><a href=""> </a></td>!.
6550                               qq!<td class="linenr">!.
6551                               qq!<a class="linenr" href="">$linenr</a></td>!;
6552                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6553                         print qq!</tr>\n!;
6554                 }
6555
6556         } else { # porcelain, i.e. ordinary blame
6557                 my %metainfo = (); # saves information about commits
6558
6559                 # blame data
6560         LINE:
6561                 while (my $line = <$fd>) {
6562                         chomp $line;
6563                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6564                         # no <lines in group> for subsequent lines in group of lines
6565                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6566                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6567                         if (!exists $metainfo{$full_rev}) {
6568                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6569                         }
6570                         my $meta = $metainfo{$full_rev};
6571                         my $data;
6572                         while ($data = <$fd>) {
6573                                 chomp $data;
6574                                 last if ($data =~ s/^\t//); # contents of line
6575                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6576                                         $meta->{$1} = $2 unless exists $meta->{$1};
6577                                 }
6578                                 if ($data =~ /^previous /) {
6579                                         $meta->{'nprevious'}++;
6580                                 }
6581                         }
6582                         my $short_rev = substr($full_rev, 0, 8);
6583                         my $author = $meta->{'author'};
6584                         my %date =
6585                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6586                         my $date = $date{'iso-tz'};
6587                         if ($group_size) {
6588                                 $current_color = ($current_color + 1) % $num_colors;
6589                         }
6590                         my $tr_class = $rev_color[$current_color];
6591                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6592                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6593                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6594                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6595                         if ($group_size) {
6596                                 print "<td class=\"sha1\"";
6597                                 print " title=\"". esc_html($author) . ", $date\"";
6598                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6599                                 print ">";
6600                                 print $cgi->a({-href => href(action=>"commit",
6601                                                              hash=>$full_rev,
6602                                                              file_name=>$file_name)},
6603                                               esc_html($short_rev));
6604                                 if ($group_size >= 2) {
6605                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6606                                         if (@author_initials) {
6607                                                 print "<br />" .
6608                                                       esc_html(join('', @author_initials));
6609                                                 #           or join('.', ...)
6610                                         }
6611                                 }
6612                                 print "</td>\n";
6613                         }
6614                         # 'previous' <sha1 of parent commit> <filename at commit>
6615                         if (exists $meta->{'previous'} &&
6616                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6617                                 $meta->{'parent'} = $1;
6618                                 $meta->{'file_parent'} = unquote($2);
6619                         }
6620                         my $linenr_commit =
6621                                 exists($meta->{'parent'}) ?
6622                                 $meta->{'parent'} : $full_rev;
6623                         my $linenr_filename =
6624                                 exists($meta->{'file_parent'}) ?
6625                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6626                         my $blamed = href(action => 'blame',
6627                                           file_name => $linenr_filename,
6628                                           hash_base => $linenr_commit);
6629                         print "<td class=\"linenr\">";
6630                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6631                                         -class => "linenr" },
6632                                       esc_html($lineno));
6633                         print "</td>";
6634                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6635                         print "</tr>\n";
6636                 } # end while
6637
6638         }
6639
6640         # footer
6641         print "</tbody>\n".
6642               "</table>\n"; # class="blame"
6643         print "</div>\n";   # class="blame_body"
6644         close $fd
6645                 or print "Reading blob failed\n";
6646
6647         git_footer_html();
6648 }
6649
6650 sub git_blame {
6651         git_blame_common();
6652 }
6653
6654 sub git_blame_incremental {
6655         git_blame_common('incremental');
6656 }
6657
6658 sub git_blame_data {
6659         git_blame_common('data');
6660 }
6661
6662 sub git_tags {
6663         my $head = git_get_head_hash($project);
6664         git_header_html();
6665         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6666         git_print_header_div('summary', $project);
6667
6668         my @tagslist = git_get_tags_list();
6669         if (@tagslist) {
6670                 git_tags_body(\@tagslist);
6671         }
6672         git_footer_html();
6673 }
6674
6675 sub git_heads {
6676         my $head = git_get_head_hash($project);
6677         git_header_html();
6678         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6679         git_print_header_div('summary', $project);
6680
6681         my @headslist = git_get_heads_list();
6682         if (@headslist) {
6683                 git_heads_body(\@headslist, $head);
6684         }
6685         git_footer_html();
6686 }
6687
6688 # used both for single remote view and for list of all the remotes
6689 sub git_remotes {
6690         gitweb_check_feature('remote_heads')
6691                 or die_error(403, "Remote heads view is disabled");
6692
6693         my $head = git_get_head_hash($project);
6694         my $remote = $input_params{'hash'};
6695
6696         my $remotedata = git_get_remotes_list($remote);
6697         die_error(500, "Unable to get remote information") unless defined $remotedata;
6698
6699         unless (%$remotedata) {
6700                 die_error(404, defined $remote ?
6701                         "Remote $remote not found" :
6702                         "No remotes found");
6703         }
6704
6705         git_header_html(undef, undef, -action_extra => $remote);
6706         git_print_page_nav('', '',  $head, undef, $head,
6707                 format_ref_views($remote ? '' : 'remotes'));
6708
6709         fill_remote_heads($remotedata);
6710         if (defined $remote) {
6711                 git_print_header_div('remotes', "$remote remote for $project");
6712                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6713         } else {
6714                 git_print_header_div('summary', "$project remotes");
6715                 git_remotes_body($remotedata, undef, $head);
6716         }
6717
6718         git_footer_html();
6719 }
6720
6721 sub git_blob_plain {
6722         my $type = shift;
6723         my $expires;
6724
6725         if (!defined $hash) {
6726                 if (defined $file_name) {
6727                         my $base = $hash_base || git_get_head_hash($project);
6728                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6729                                 or die_error(404, "Cannot find file");
6730                 } else {
6731                         die_error(400, "No file name defined");
6732                 }
6733         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6734                 # blobs defined by non-textual hash id's can be cached
6735                 $expires = "+1d";
6736         }
6737
6738         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6739                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6740
6741         # content-type (can include charset)
6742         $type = blob_contenttype($fd, $file_name, $type);
6743
6744         # "save as" filename, even when no $file_name is given
6745         my $save_as = "$hash";
6746         if (defined $file_name) {
6747                 $save_as = $file_name;
6748         } elsif ($type =~ m/^text\//) {
6749                 $save_as .= '.txt';
6750         }
6751
6752         # With XSS prevention on, blobs of all types except a few known safe
6753         # ones are served with "Content-Disposition: attachment" to make sure
6754         # they don't run in our security domain.  For certain image types,
6755         # blob view writes an <img> tag referring to blob_plain view, and we
6756         # want to be sure not to break that by serving the image as an
6757         # attachment (though Firefox 3 doesn't seem to care).
6758         my $sandbox = $prevent_xss &&
6759                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6760
6761         # serve text/* as text/plain
6762         if ($prevent_xss &&
6763             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6764              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6765                 my $rest = $1;
6766                 $rest = defined $rest ? $rest : '';
6767                 $type = "text/plain$rest";
6768         }
6769
6770         print $cgi->header(
6771                 -type => $type,
6772                 -expires => $expires,
6773                 -content_disposition =>
6774                         ($sandbox ? 'attachment' : 'inline')
6775                         . '; filename="' . $save_as . '"');
6776         local $/ = undef;
6777         binmode STDOUT, ':raw';
6778         print <$fd>;
6779         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6780         close $fd;
6781 }
6782
6783 sub git_blob {
6784         my $expires;
6785
6786         if (!defined $hash) {
6787                 if (defined $file_name) {
6788                         my $base = $hash_base || git_get_head_hash($project);
6789                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6790                                 or die_error(404, "Cannot find file");
6791                 } else {
6792                         die_error(400, "No file name defined");
6793                 }
6794         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6795                 # blobs defined by non-textual hash id's can be cached
6796                 $expires = "+1d";
6797         }
6798
6799         my $have_blame = gitweb_check_feature('blame');
6800         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6801                 or die_error(500, "Couldn't cat $file_name, $hash");
6802         my $mimetype = blob_mimetype($fd, $file_name);
6803         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6804         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6805                 close $fd;
6806                 return git_blob_plain($mimetype);
6807         }
6808         # we can have blame only for text/* mimetype
6809         $have_blame &&= ($mimetype =~ m!^text/!);
6810
6811         my $highlight = gitweb_check_feature('highlight');
6812         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6813         $fd = run_highlighter($fd, $highlight, $syntax)
6814                 if $syntax;
6815
6816         git_header_html(undef, $expires);
6817         my $formats_nav = '';
6818         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6819                 if (defined $file_name) {
6820                         if ($have_blame) {
6821                                 $formats_nav .=
6822                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6823                                                 "blame") .
6824                                         " | ";
6825                         }
6826                         $formats_nav .=
6827                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6828                                         "history") .
6829                                 " | " .
6830                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6831                                         "raw") .
6832                                 " | " .
6833                                 $cgi->a({-href => href(action=>"blob",
6834                                                        hash_base=>"HEAD", file_name=>$file_name)},
6835                                         "HEAD");
6836                 } else {
6837                         $formats_nav .=
6838                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6839                                         "raw");
6840                 }
6841                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6842                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6843         } else {
6844                 print "<div class=\"page_nav\">\n" .
6845                       "<br/><br/></div>\n" .
6846                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6847         }
6848         git_print_page_path($file_name, "blob", $hash_base);
6849         print "<div class=\"page_body\">\n";
6850         if ($mimetype =~ m!^image/!) {
6851                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6852                 if ($file_name) {
6853                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6854                 }
6855                 print qq! src="! .
6856                       href(action=>"blob_plain", hash=>$hash,
6857                            hash_base=>$hash_base, file_name=>$file_name) .
6858                       qq!" />\n!;
6859         } else {
6860                 my $nr;
6861                 while (my $line = <$fd>) {
6862                         chomp $line;
6863                         $nr++;
6864                         $line = untabify($line);
6865                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6866                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6867                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6868                 }
6869         }
6870         close $fd
6871                 or print "Reading blob failed.\n";
6872         print "</div>";
6873         git_footer_html();
6874 }
6875
6876 sub git_tree {
6877         if (!defined $hash_base) {
6878                 $hash_base = "HEAD";
6879         }
6880         if (!defined $hash) {
6881                 if (defined $file_name) {
6882                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6883                 } else {
6884                         $hash = $hash_base;
6885                 }
6886         }
6887         die_error(404, "No such tree") unless defined($hash);
6888
6889         my $show_sizes = gitweb_check_feature('show-sizes');
6890         my $have_blame = gitweb_check_feature('blame');
6891
6892         my @entries = ();
6893         {
6894                 local $/ = "\0";
6895                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6896                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6897                         or die_error(500, "Open git-ls-tree failed");
6898                 @entries = map { chomp; $_ } <$fd>;
6899                 close $fd
6900                         or die_error(404, "Reading tree failed");
6901         }
6902
6903         my $refs = git_get_references();
6904         my $ref = format_ref_marker($refs, $hash_base);
6905         git_header_html();
6906         my $basedir = '';
6907         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6908                 my @views_nav = ();
6909                 if (defined $file_name) {
6910                         push @views_nav,
6911                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6912                                         "history"),
6913                                 $cgi->a({-href => href(action=>"tree",
6914                                                        hash_base=>"HEAD", file_name=>$file_name)},
6915                                         "HEAD"),
6916                 }
6917                 my $snapshot_links = format_snapshot_links($hash);
6918                 if (defined $snapshot_links) {
6919                         # FIXME: Should be available when we have no hash base as well.
6920                         push @views_nav, $snapshot_links;
6921                 }
6922                 git_print_page_nav('tree','', $hash_base, undef, undef,
6923                                    join(' | ', @views_nav));
6924                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6925         } else {
6926                 undef $hash_base;
6927                 print "<div class=\"page_nav\">\n";
6928                 print "<br/><br/></div>\n";
6929                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6930         }
6931         if (defined $file_name) {
6932                 $basedir = $file_name;
6933                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6934                         $basedir .= '/';
6935                 }
6936                 git_print_page_path($file_name, 'tree', $hash_base);
6937         }
6938         print "<div class=\"page_body\">\n";
6939         print "<table class=\"tree\">\n";
6940         my $alternate = 1;
6941         # '..' (top directory) link if possible
6942         if (defined $hash_base &&
6943             defined $file_name && $file_name =~ m![^/]+$!) {
6944                 if ($alternate) {
6945                         print "<tr class=\"dark\">\n";
6946                 } else {
6947                         print "<tr class=\"light\">\n";
6948                 }
6949                 $alternate ^= 1;
6950
6951                 my $up = $file_name;
6952                 $up =~ s!/?[^/]+$!!;
6953                 undef $up unless $up;
6954                 # based on git_print_tree_entry
6955                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6956                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6957                 print '<td class="list">';
6958                 print $cgi->a({-href => href(action=>"tree",
6959                                              hash_base=>$hash_base,
6960                                              file_name=>$up)},
6961                               "..");
6962                 print "</td>\n";
6963                 print "<td class=\"link\"></td>\n";
6964
6965                 print "</tr>\n";
6966         }
6967         foreach my $line (@entries) {
6968                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6969
6970                 if ($alternate) {
6971                         print "<tr class=\"dark\">\n";
6972                 } else {
6973                         print "<tr class=\"light\">\n";
6974                 }
6975                 $alternate ^= 1;
6976
6977                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6978
6979                 print "</tr>\n";
6980         }
6981         print "</table>\n" .
6982               "</div>";
6983         git_footer_html();
6984 }
6985
6986 sub snapshot_name {
6987         my ($project, $hash) = @_;
6988
6989         # path/to/project.git  -> project
6990         # path/to/project/.git -> project
6991         my $name = to_utf8($project);
6992         $name =~ s,([^/])/*\.git$,$1,;
6993         $name = basename($name);
6994         # sanitize name
6995         $name =~ s/[[:cntrl:]]/?/g;
6996
6997         my $ver = $hash;
6998         if ($hash =~ /^[0-9a-fA-F]+$/) {
6999                 # shorten SHA-1 hash
7000                 my $full_hash = git_get_full_hash($project, $hash);
7001                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7002                         $ver = git_get_short_hash($project, $hash);
7003                 }
7004         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7005                 # tags don't need shortened SHA-1 hash
7006                 $ver = $1;
7007         } else {
7008                 # branches and other need shortened SHA-1 hash
7009                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7010                         $ver = $1;
7011                 }
7012                 $ver .= '-' . git_get_short_hash($project, $hash);
7013         }
7014         # in case of hierarchical branch names
7015         $ver =~ s!/!.!g;
7016
7017         # name = project-version_string
7018         $name = "$name-$ver";
7019
7020         return wantarray ? ($name, $name) : $name;
7021 }
7022
7023 sub git_snapshot {
7024         my $format = $input_params{'snapshot_format'};
7025         if (!@snapshot_fmts) {
7026                 die_error(403, "Snapshots not allowed");
7027         }
7028         # default to first supported snapshot format
7029         $format ||= $snapshot_fmts[0];
7030         if ($format !~ m/^[a-z0-9]+$/) {
7031                 die_error(400, "Invalid snapshot format parameter");
7032         } elsif (!exists($known_snapshot_formats{$format})) {
7033                 die_error(400, "Unknown snapshot format");
7034         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7035                 die_error(403, "Snapshot format not allowed");
7036         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7037                 die_error(403, "Unsupported snapshot format");
7038         }
7039
7040         my $type = git_get_type("$hash^{}");
7041         if (!$type) {
7042                 die_error(404, 'Object does not exist');
7043         }  elsif ($type eq 'blob') {
7044                 die_error(400, 'Object is not a tree-ish');
7045         }
7046
7047         my ($name, $prefix) = snapshot_name($project, $hash);
7048         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7049         my $cmd = quote_command(
7050                 git_cmd(), 'archive',
7051                 "--format=$known_snapshot_formats{$format}{'format'}",
7052                 "--prefix=$prefix/", $hash);
7053         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7054                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7055         }
7056
7057         $filename =~ s/(["\\])/\\$1/g;
7058         print $cgi->header(
7059                 -type => $known_snapshot_formats{$format}{'type'},
7060                 -content_disposition => 'inline; filename="' . $filename . '"',
7061                 -status => '200 OK');
7062
7063         open my $fd, "-|", $cmd
7064                 or die_error(500, "Execute git-archive failed");
7065         binmode STDOUT, ':raw';
7066         print <$fd>;
7067         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7068         close $fd;
7069 }
7070
7071 sub git_log_generic {
7072         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7073
7074         my $head = git_get_head_hash($project);
7075         if (!defined $base) {
7076                 $base = $head;
7077         }
7078         if (!defined $page) {
7079                 $page = 0;
7080         }
7081         my $refs = git_get_references();
7082
7083         my $commit_hash = $base;
7084         if (defined $parent) {
7085                 $commit_hash = "$parent..$base";
7086         }
7087         my @commitlist =
7088                 parse_commits($commit_hash, 101, (100 * $page),
7089                               defined $file_name ? ($file_name, "--full-history") : ());
7090
7091         my $ftype;
7092         if (!defined $file_hash && defined $file_name) {
7093                 # some commits could have deleted file in question,
7094                 # and not have it in tree, but one of them has to have it
7095                 for (my $i = 0; $i < @commitlist; $i++) {
7096                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7097                         last if defined $file_hash;
7098                 }
7099         }
7100         if (defined $file_hash) {
7101                 $ftype = git_get_type($file_hash);
7102         }
7103         if (defined $file_name && !defined $ftype) {
7104                 die_error(500, "Unknown type of object");
7105         }
7106         my %co;
7107         if (defined $file_name) {
7108                 %co = parse_commit($base)
7109                         or die_error(404, "Unknown commit object");
7110         }
7111
7112
7113         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7114         my $next_link = '';
7115         if ($#commitlist >= 100) {
7116                 $next_link =
7117                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7118                                  -accesskey => "n", -title => "Alt-n"}, "next");
7119         }
7120         my $patch_max = gitweb_get_feature('patches');
7121         if ($patch_max && !defined $file_name) {
7122                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7123                         $paging_nav .= " &sdot; " .
7124                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7125                                         "patches");
7126                 }
7127         }
7128
7129         git_header_html();
7130         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7131         if (defined $file_name) {
7132                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7133         } else {
7134                 git_print_header_div('summary', $project)
7135         }
7136         git_print_page_path($file_name, $ftype, $hash_base)
7137                 if (defined $file_name);
7138
7139         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7140                      $file_name, $file_hash, $ftype);
7141
7142         git_footer_html();
7143 }
7144
7145 sub git_log {
7146         git_log_generic('log', \&git_log_body,
7147                         $hash, $hash_parent);
7148 }
7149
7150 sub git_commit {
7151         $hash ||= $hash_base || "HEAD";
7152         my %co = parse_commit($hash)
7153             or die_error(404, "Unknown commit object");
7154
7155         my $parent  = $co{'parent'};
7156         my $parents = $co{'parents'}; # listref
7157
7158         # we need to prepare $formats_nav before any parameter munging
7159         my $formats_nav;
7160         if (!defined $parent) {
7161                 # --root commitdiff
7162                 $formats_nav .= '(initial)';
7163         } elsif (@$parents == 1) {
7164                 # single parent commit
7165                 $formats_nav .=
7166                         '(parent: ' .
7167                         $cgi->a({-href => href(action=>"commit",
7168                                                hash=>$parent)},
7169                                 esc_html(substr($parent, 0, 7))) .
7170                         ')';
7171         } else {
7172                 # merge commit
7173                 $formats_nav .=
7174                         '(merge: ' .
7175                         join(' ', map {
7176                                 $cgi->a({-href => href(action=>"commit",
7177                                                        hash=>$_)},
7178                                         esc_html(substr($_, 0, 7)));
7179                         } @$parents ) .
7180                         ')';
7181         }
7182         if (gitweb_check_feature('patches') && @$parents <= 1) {
7183                 $formats_nav .= " | " .
7184                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7185                                 "patch");
7186         }
7187
7188         if (!defined $parent) {
7189                 $parent = "--root";
7190         }
7191         my @difftree;
7192         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7193                 @diff_opts,
7194                 (@$parents <= 1 ? $parent : '-c'),
7195                 $hash, "--"
7196                 or die_error(500, "Open git-diff-tree failed");
7197         @difftree = map { chomp; $_ } <$fd>;
7198         close $fd or die_error(404, "Reading git-diff-tree failed");
7199
7200         # non-textual hash id's can be cached
7201         my $expires;
7202         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7203                 $expires = "+1d";
7204         }
7205         my $refs = git_get_references();
7206         my $ref = format_ref_marker($refs, $co{'id'});
7207
7208         git_header_html(undef, $expires);
7209         git_print_page_nav('commit', '',
7210                            $hash, $co{'tree'}, $hash,
7211                            $formats_nav);
7212
7213         if (defined $co{'parent'}) {
7214                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7215         } else {
7216                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7217         }
7218         print "<div class=\"title_text\">\n" .
7219               "<table class=\"object_header\">\n";
7220         git_print_authorship_rows(\%co);
7221         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7222         print "<tr>" .
7223               "<td>tree</td>" .
7224               "<td class=\"sha1\">" .
7225               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7226                        class => "list"}, $co{'tree'}) .
7227               "</td>" .
7228               "<td class=\"link\">" .
7229               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7230                       "tree");
7231         my $snapshot_links = format_snapshot_links($hash);
7232         if (defined $snapshot_links) {
7233                 print " | " . $snapshot_links;
7234         }
7235         print "</td>" .
7236               "</tr>\n";
7237
7238         foreach my $par (@$parents) {
7239                 print "<tr>" .
7240                       "<td>parent</td>" .
7241                       "<td class=\"sha1\">" .
7242                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7243                                class => "list"}, $par) .
7244                       "</td>" .
7245                       "<td class=\"link\">" .
7246                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7247                       " | " .
7248                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7249                       "</td>" .
7250                       "</tr>\n";
7251         }
7252         print "</table>".
7253               "</div>\n";
7254
7255         print "<div class=\"page_body\">\n";
7256         git_print_log($co{'comment'});
7257         print "</div>\n";
7258
7259         git_difftree_body(\@difftree, $hash, @$parents);
7260
7261         git_footer_html();
7262 }
7263
7264 sub git_object {
7265         # object is defined by:
7266         # - hash or hash_base alone
7267         # - hash_base and file_name
7268         my $type;
7269
7270         # - hash or hash_base alone
7271         if ($hash || ($hash_base && !defined $file_name)) {
7272                 my $object_id = $hash || $hash_base;
7273
7274                 open my $fd, "-|", quote_command(
7275                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7276                         or die_error(404, "Object does not exist");
7277                 $type = <$fd>;
7278                 chomp $type;
7279                 close $fd
7280                         or die_error(404, "Object does not exist");
7281
7282         # - hash_base and file_name
7283         } elsif ($hash_base && defined $file_name) {
7284                 $file_name =~ s,/+$,,;
7285
7286                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7287                         or die_error(404, "Base object does not exist");
7288
7289                 # here errors should not hapen
7290                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7291                         or die_error(500, "Open git-ls-tree failed");
7292                 my $line = <$fd>;
7293                 close $fd;
7294
7295                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7296                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7297                         die_error(404, "File or directory for given base does not exist");
7298                 }
7299                 $type = $2;
7300                 $hash = $3;
7301         } else {
7302                 die_error(400, "Not enough information to find object");
7303         }
7304
7305         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7306                                           hash=>$hash, hash_base=>$hash_base,
7307                                           file_name=>$file_name),
7308                              -status => '302 Found');
7309 }
7310
7311 sub git_blobdiff {
7312         my $format = shift || 'html';
7313         my $diff_style = $input_params{'diff_style'} || 'inline';
7314
7315         my $fd;
7316         my @difftree;
7317         my %diffinfo;
7318         my $expires;
7319
7320         # preparing $fd and %diffinfo for git_patchset_body
7321         # new style URI
7322         if (defined $hash_base && defined $hash_parent_base) {
7323                 if (defined $file_name) {
7324                         # read raw output
7325                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7326                                 $hash_parent_base, $hash_base,
7327                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7328                                 or die_error(500, "Open git-diff-tree failed");
7329                         @difftree = map { chomp; $_ } <$fd>;
7330                         close $fd
7331                                 or die_error(404, "Reading git-diff-tree failed");
7332                         @difftree
7333                                 or die_error(404, "Blob diff not found");
7334
7335                 } elsif (defined $hash &&
7336                          $hash =~ /[0-9a-fA-F]{40}/) {
7337                         # try to find filename from $hash
7338
7339                         # read filtered raw output
7340                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7341                                 $hash_parent_base, $hash_base, "--"
7342                                 or die_error(500, "Open git-diff-tree failed");
7343                         @difftree =
7344                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7345                                 # $hash == to_id
7346                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7347                                 map { chomp; $_ } <$fd>;
7348                         close $fd
7349                                 or die_error(404, "Reading git-diff-tree failed");
7350                         @difftree
7351                                 or die_error(404, "Blob diff not found");
7352
7353                 } else {
7354                         die_error(400, "Missing one of the blob diff parameters");
7355                 }
7356
7357                 if (@difftree > 1) {
7358                         die_error(400, "Ambiguous blob diff specification");
7359                 }
7360
7361                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7362                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7363                 $file_name   ||= $diffinfo{'to_file'};
7364
7365                 $hash_parent ||= $diffinfo{'from_id'};
7366                 $hash        ||= $diffinfo{'to_id'};
7367
7368                 # non-textual hash id's can be cached
7369                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7370                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7371                         $expires = '+1d';
7372                 }
7373
7374                 # open patch output
7375                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7376                         '-p', ($format eq 'html' ? "--full-index" : ()),
7377                         $hash_parent_base, $hash_base,
7378                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7379                         or die_error(500, "Open git-diff-tree failed");
7380         }
7381
7382         # old/legacy style URI -- not generated anymore since 1.4.3.
7383         if (!%diffinfo) {
7384                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7385         }
7386
7387         # header
7388         if ($format eq 'html') {
7389                 my $formats_nav =
7390                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7391                                 "raw");
7392                 $formats_nav .= diff_style_nav($diff_style);
7393                 git_header_html(undef, $expires);
7394                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7395                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7396                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7397                 } else {
7398                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7399                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7400                 }
7401                 if (defined $file_name) {
7402                         git_print_page_path($file_name, "blob", $hash_base);
7403                 } else {
7404                         print "<div class=\"page_path\"></div>\n";
7405                 }
7406
7407         } elsif ($format eq 'plain') {
7408                 print $cgi->header(
7409                         -type => 'text/plain',
7410                         -charset => 'utf-8',
7411                         -expires => $expires,
7412                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7413
7414                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7415
7416         } else {
7417                 die_error(400, "Unknown blobdiff format");
7418         }
7419
7420         # patch
7421         if ($format eq 'html') {
7422                 print "<div class=\"page_body\">\n";
7423
7424                 git_patchset_body($fd, $diff_style,
7425                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7426                 close $fd;
7427
7428                 print "</div>\n"; # class="page_body"
7429                 git_footer_html();
7430
7431         } else {
7432                 while (my $line = <$fd>) {
7433                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7434                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7435
7436                         print $line;
7437
7438                         last if $line =~ m!^\+\+\+!;
7439                 }
7440                 local $/ = undef;
7441                 print <$fd>;
7442                 close $fd;
7443         }
7444 }
7445
7446 sub git_blobdiff_plain {
7447         git_blobdiff('plain');
7448 }
7449
7450 # assumes that it is added as later part of already existing navigation,
7451 # so it returns "| foo | bar" rather than just "foo | bar"
7452 sub diff_style_nav {
7453         my ($diff_style, $is_combined) = @_;
7454         $diff_style ||= 'inline';
7455
7456         return "" if ($is_combined);
7457
7458         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7459         my %styles = @styles;
7460         @styles =
7461                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7462
7463         return join '',
7464                 map { " | ".$_ }
7465                 map {
7466                         $_ eq $diff_style ? $styles{$_} :
7467                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7468                 } @styles;
7469 }
7470
7471 sub git_commitdiff {
7472         my %params = @_;
7473         my $format = $params{-format} || 'html';
7474         my $diff_style = $input_params{'diff_style'} || 'inline';
7475
7476         my ($patch_max) = gitweb_get_feature('patches');
7477         if ($format eq 'patch') {
7478                 die_error(403, "Patch view not allowed") unless $patch_max;
7479         }
7480
7481         $hash ||= $hash_base || "HEAD";
7482         my %co = parse_commit($hash)
7483             or die_error(404, "Unknown commit object");
7484
7485         # choose format for commitdiff for merge
7486         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7487                 $hash_parent = '--cc';
7488         }
7489         # we need to prepare $formats_nav before almost any parameter munging
7490         my $formats_nav;
7491         if ($format eq 'html') {
7492                 $formats_nav =
7493                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7494                                 "raw");
7495                 if ($patch_max && @{$co{'parents'}} <= 1) {
7496                         $formats_nav .= " | " .
7497                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7498                                         "patch");
7499                 }
7500                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7501
7502                 if (defined $hash_parent &&
7503                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7504                         # commitdiff with two commits given
7505                         my $hash_parent_short = $hash_parent;
7506                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7507                                 $hash_parent_short = substr($hash_parent, 0, 7);
7508                         }
7509                         $formats_nav .=
7510                                 ' (from';
7511                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7512                                 if ($co{'parents'}[$i] eq $hash_parent) {
7513                                         $formats_nav .= ' parent ' . ($i+1);
7514                                         last;
7515                                 }
7516                         }
7517                         $formats_nav .= ': ' .
7518                                 $cgi->a({-href => href(-replay=>1,
7519                                                        hash=>$hash_parent, hash_base=>undef)},
7520                                         esc_html($hash_parent_short)) .
7521                                 ')';
7522                 } elsif (!$co{'parent'}) {
7523                         # --root commitdiff
7524                         $formats_nav .= ' (initial)';
7525                 } elsif (scalar @{$co{'parents'}} == 1) {
7526                         # single parent commit
7527                         $formats_nav .=
7528                                 ' (parent: ' .
7529                                 $cgi->a({-href => href(-replay=>1,
7530                                                        hash=>$co{'parent'}, hash_base=>undef)},
7531                                         esc_html(substr($co{'parent'}, 0, 7))) .
7532                                 ')';
7533                 } else {
7534                         # merge commit
7535                         if ($hash_parent eq '--cc') {
7536                                 $formats_nav .= ' | ' .
7537                                         $cgi->a({-href => href(-replay=>1,
7538                                                                hash=>$hash, hash_parent=>'-c')},
7539                                                 'combined');
7540                         } else { # $hash_parent eq '-c'
7541                                 $formats_nav .= ' | ' .
7542                                         $cgi->a({-href => href(-replay=>1,
7543                                                                hash=>$hash, hash_parent=>'--cc')},
7544                                                 'compact');
7545                         }
7546                         $formats_nav .=
7547                                 ' (merge: ' .
7548                                 join(' ', map {
7549                                         $cgi->a({-href => href(-replay=>1,
7550                                                                hash=>$_, hash_base=>undef)},
7551                                                 esc_html(substr($_, 0, 7)));
7552                                 } @{$co{'parents'}} ) .
7553                                 ')';
7554                 }
7555         }
7556
7557         my $hash_parent_param = $hash_parent;
7558         if (!defined $hash_parent_param) {
7559                 # --cc for multiple parents, --root for parentless
7560                 $hash_parent_param =
7561                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7562         }
7563
7564         # read commitdiff
7565         my $fd;
7566         my @difftree;
7567         if ($format eq 'html') {
7568                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7569                         "--no-commit-id", "--patch-with-raw", "--full-index",
7570                         $hash_parent_param, $hash, "--"
7571                         or die_error(500, "Open git-diff-tree failed");
7572
7573                 while (my $line = <$fd>) {
7574                         chomp $line;
7575                         # empty line ends raw part of diff-tree output
7576                         last unless $line;
7577                         push @difftree, scalar parse_difftree_raw_line($line);
7578                 }
7579
7580         } elsif ($format eq 'plain') {
7581                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7582                         '-p', $hash_parent_param, $hash, "--"
7583                         or die_error(500, "Open git-diff-tree failed");
7584         } elsif ($format eq 'patch') {
7585                 # For commit ranges, we limit the output to the number of
7586                 # patches specified in the 'patches' feature.
7587                 # For single commits, we limit the output to a single patch,
7588                 # diverging from the git-format-patch default.
7589                 my @commit_spec = ();
7590                 if ($hash_parent) {
7591                         if ($patch_max > 0) {
7592                                 push @commit_spec, "-$patch_max";
7593                         }
7594                         push @commit_spec, '-n', "$hash_parent..$hash";
7595                 } else {
7596                         if ($params{-single}) {
7597                                 push @commit_spec, '-1';
7598                         } else {
7599                                 if ($patch_max > 0) {
7600                                         push @commit_spec, "-$patch_max";
7601                                 }
7602                                 push @commit_spec, "-n";
7603                         }
7604                         push @commit_spec, '--root', $hash;
7605                 }
7606                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7607                         '--encoding=utf8', '--stdout', @commit_spec
7608                         or die_error(500, "Open git-format-patch failed");
7609         } else {
7610                 die_error(400, "Unknown commitdiff format");
7611         }
7612
7613         # non-textual hash id's can be cached
7614         my $expires;
7615         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7616                 $expires = "+1d";
7617         }
7618
7619         # write commit message
7620         if ($format eq 'html') {
7621                 my $refs = git_get_references();
7622                 my $ref = format_ref_marker($refs, $co{'id'});
7623
7624                 git_header_html(undef, $expires);
7625                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7626                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7627                 print "<div class=\"title_text\">\n" .
7628                       "<table class=\"object_header\">\n";
7629                 git_print_authorship_rows(\%co);
7630                 print "</table>".
7631                       "</div>\n";
7632                 print "<div class=\"page_body\">\n";
7633                 if (@{$co{'comment'}} > 1) {
7634                         print "<div class=\"log\">\n";
7635                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7636                         print "</div>\n"; # class="log"
7637                 }
7638
7639         } elsif ($format eq 'plain') {
7640                 my $refs = git_get_references("tags");
7641                 my $tagname = git_get_rev_name_tags($hash);
7642                 my $filename = basename($project) . "-$hash.patch";
7643
7644                 print $cgi->header(
7645                         -type => 'text/plain',
7646                         -charset => 'utf-8',
7647                         -expires => $expires,
7648                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7649                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7650                 print "From: " . to_utf8($co{'author'}) . "\n";
7651                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7652                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7653
7654                 print "X-Git-Tag: $tagname\n" if $tagname;
7655                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7656
7657                 foreach my $line (@{$co{'comment'}}) {
7658                         print to_utf8($line) . "\n";
7659                 }
7660                 print "---\n\n";
7661         } elsif ($format eq 'patch') {
7662                 my $filename = basename($project) . "-$hash.patch";
7663
7664                 print $cgi->header(
7665                         -type => 'text/plain',
7666                         -charset => 'utf-8',
7667                         -expires => $expires,
7668                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7669         }
7670
7671         # write patch
7672         if ($format eq 'html') {
7673                 my $use_parents = !defined $hash_parent ||
7674                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7675                 git_difftree_body(\@difftree, $hash,
7676                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7677                 print "<br/>\n";
7678
7679                 git_patchset_body($fd, $diff_style,
7680                                   \@difftree, $hash,
7681                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7682                 close $fd;
7683                 print "</div>\n"; # class="page_body"
7684                 git_footer_html();
7685
7686         } elsif ($format eq 'plain') {
7687                 local $/ = undef;
7688                 print <$fd>;
7689                 close $fd
7690                         or print "Reading git-diff-tree failed\n";
7691         } elsif ($format eq 'patch') {
7692                 local $/ = undef;
7693                 print <$fd>;
7694                 close $fd
7695                         or print "Reading git-format-patch failed\n";
7696         }
7697 }
7698
7699 sub git_commitdiff_plain {
7700         git_commitdiff(-format => 'plain');
7701 }
7702
7703 # format-patch-style patches
7704 sub git_patch {
7705         git_commitdiff(-format => 'patch', -single => 1);
7706 }
7707
7708 sub git_patches {
7709         git_commitdiff(-format => 'patch');
7710 }
7711
7712 sub git_history {
7713         git_log_generic('history', \&git_history_body,
7714                         $hash_base, $hash_parent_base,
7715                         $file_name, $hash);
7716 }
7717
7718 sub git_search {
7719         $searchtype ||= 'commit';
7720
7721         # check if appropriate features are enabled
7722         gitweb_check_feature('search')
7723                 or die_error(403, "Search is disabled");
7724         if ($searchtype eq 'pickaxe') {
7725                 # pickaxe may take all resources of your box and run for several minutes
7726                 # with every query - so decide by yourself how public you make this feature
7727                 gitweb_check_feature('pickaxe')
7728                         or die_error(403, "Pickaxe search is disabled");
7729         }
7730         if ($searchtype eq 'grep') {
7731                 # grep search might be potentially CPU-intensive, too
7732                 gitweb_check_feature('grep')
7733                         or die_error(403, "Grep search is disabled");
7734         }
7735
7736         if (!defined $searchtext) {
7737                 die_error(400, "Text field is empty");
7738         }
7739         if (!defined $hash) {
7740                 $hash = git_get_head_hash($project);
7741         }
7742         my %co = parse_commit($hash);
7743         if (!%co) {
7744                 die_error(404, "Unknown commit object");
7745         }
7746         if (!defined $page) {
7747                 $page = 0;
7748         }
7749
7750         if ($searchtype eq 'commit' ||
7751             $searchtype eq 'author' ||
7752             $searchtype eq 'committer') {
7753                 git_search_message(%co);
7754         } elsif ($searchtype eq 'pickaxe') {
7755                 git_search_changes(%co);
7756         } elsif ($searchtype eq 'grep') {
7757                 git_search_files(%co);
7758         } else {
7759                 die_error(400, "Unknown search type");
7760         }
7761 }
7762
7763 sub git_search_help {
7764         git_header_html();
7765         git_print_page_nav('','', $hash,$hash,$hash);
7766         print <<EOT;
7767 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7768 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7769 the pattern entered is recognized as the POSIX extended
7770 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7771 insensitive).</p>
7772 <dl>
7773 <dt><b>commit</b></dt>
7774 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7775 EOT
7776         my $have_grep = gitweb_check_feature('grep');
7777         if ($have_grep) {
7778                 print <<EOT;
7779 <dt><b>grep</b></dt>
7780 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7781     a different one) are searched for the given pattern. On large trees, this search can take
7782 a while and put some strain on the server, so please use it with some consideration. Note that
7783 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7784 case-sensitive.</dd>
7785 EOT
7786         }
7787         print <<EOT;
7788 <dt><b>author</b></dt>
7789 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7790 <dt><b>committer</b></dt>
7791 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7792 EOT
7793         my $have_pickaxe = gitweb_check_feature('pickaxe');
7794         if ($have_pickaxe) {
7795                 print <<EOT;
7796 <dt><b>pickaxe</b></dt>
7797 <dd>All commits that caused the string to appear or disappear from any file (changes that
7798 added, removed or "modified" the string) will be listed. This search can take a while and
7799 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7800 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7801 EOT
7802         }
7803         print "</dl>\n";
7804         git_footer_html();
7805 }
7806
7807 sub git_shortlog {
7808         git_log_generic('shortlog', \&git_shortlog_body,
7809                         $hash, $hash_parent);
7810 }
7811
7812 ## ......................................................................
7813 ## feeds (RSS, Atom; OPML)
7814
7815 sub git_feed {
7816         my $format = shift || 'atom';
7817         my $have_blame = gitweb_check_feature('blame');
7818
7819         # Atom: http://www.atomenabled.org/developers/syndication/
7820         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7821         if ($format ne 'rss' && $format ne 'atom') {
7822                 die_error(400, "Unknown web feed format");
7823         }
7824
7825         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7826         my $head = $hash || 'HEAD';
7827         my @commitlist = parse_commits($head, 150, 0, $file_name);
7828
7829         my %latest_commit;
7830         my %latest_date;
7831         my $content_type = "application/$format+xml";
7832         if (defined $cgi->http('HTTP_ACCEPT') &&
7833                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7834                 # browser (feed reader) prefers text/xml
7835                 $content_type = 'text/xml';
7836         }
7837         if (defined($commitlist[0])) {
7838                 %latest_commit = %{$commitlist[0]};
7839                 my $latest_epoch = $latest_commit{'committer_epoch'};
7840                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7841                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7842                 if (defined $if_modified) {
7843                         my $since;
7844                         if (eval { require HTTP::Date; 1; }) {
7845                                 $since = HTTP::Date::str2time($if_modified);
7846                         } elsif (eval { require Time::ParseDate; 1; }) {
7847                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7848                         }
7849                         if (defined $since && $latest_epoch <= $since) {
7850                                 print $cgi->header(
7851                                         -type => $content_type,
7852                                         -charset => 'utf-8',
7853                                         -last_modified => $latest_date{'rfc2822'},
7854                                         -status => '304 Not Modified');
7855                                 return;
7856                         }
7857                 }
7858                 print $cgi->header(
7859                         -type => $content_type,
7860                         -charset => 'utf-8',
7861                         -last_modified => $latest_date{'rfc2822'});
7862         } else {
7863                 print $cgi->header(
7864                         -type => $content_type,
7865                         -charset => 'utf-8');
7866         }
7867
7868         # Optimization: skip generating the body if client asks only
7869         # for Last-Modified date.
7870         return if ($cgi->request_method() eq 'HEAD');
7871
7872         # header variables
7873         my $title = "$site_name - $project/$action";
7874         my $feed_type = 'log';
7875         if (defined $hash) {
7876                 $title .= " - '$hash'";
7877                 $feed_type = 'branch log';
7878                 if (defined $file_name) {
7879                         $title .= " :: $file_name";
7880                         $feed_type = 'history';
7881                 }
7882         } elsif (defined $file_name) {
7883                 $title .= " - $file_name";
7884                 $feed_type = 'history';
7885         }
7886         $title .= " $feed_type";
7887         my $descr = git_get_project_description($project);
7888         if (defined $descr) {
7889                 $descr = esc_html($descr);
7890         } else {
7891                 $descr = "$project " .
7892                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7893                          " feed";
7894         }
7895         my $owner = git_get_project_owner($project);
7896         $owner = esc_html($owner);
7897
7898         #header
7899         my $alt_url;
7900         if (defined $file_name) {
7901                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7902         } elsif (defined $hash) {
7903                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7904         } else {
7905                 $alt_url = href(-full=>1, action=>"summary");
7906         }
7907         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7908         if ($format eq 'rss') {
7909                 print <<XML;
7910 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7911 <channel>
7912 XML
7913                 print "<title>$title</title>\n" .
7914                       "<link>$alt_url</link>\n" .
7915                       "<description>$descr</description>\n" .
7916                       "<language>en</language>\n" .
7917                       # project owner is responsible for 'editorial' content
7918                       "<managingEditor>$owner</managingEditor>\n";
7919                 if (defined $logo || defined $favicon) {
7920                         # prefer the logo to the favicon, since RSS
7921                         # doesn't allow both
7922                         my $img = esc_url($logo || $favicon);
7923                         print "<image>\n" .
7924                               "<url>$img</url>\n" .
7925                               "<title>$title</title>\n" .
7926                               "<link>$alt_url</link>\n" .
7927                               "</image>\n";
7928                 }
7929                 if (%latest_date) {
7930                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7931                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7932                 }
7933                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7934         } elsif ($format eq 'atom') {
7935                 print <<XML;
7936 <feed xmlns="http://www.w3.org/2005/Atom">
7937 XML
7938                 print "<title>$title</title>\n" .
7939                       "<subtitle>$descr</subtitle>\n" .
7940                       '<link rel="alternate" type="text/html" href="' .
7941                       $alt_url . '" />' . "\n" .
7942                       '<link rel="self" type="' . $content_type . '" href="' .
7943                       $cgi->self_url() . '" />' . "\n" .
7944                       "<id>" . href(-full=>1) . "</id>\n" .
7945                       # use project owner for feed author
7946                       "<author><name>$owner</name></author>\n";
7947                 if (defined $favicon) {
7948                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7949                 }
7950                 if (defined $logo) {
7951                         # not twice as wide as tall: 72 x 27 pixels
7952                         print "<logo>" . esc_url($logo) . "</logo>\n";
7953                 }
7954                 if (! %latest_date) {
7955                         # dummy date to keep the feed valid until commits trickle in:
7956                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7957                 } else {
7958                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7959                 }
7960                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7961         }
7962
7963         # contents
7964         for (my $i = 0; $i <= $#commitlist; $i++) {
7965                 my %co = %{$commitlist[$i]};
7966                 my $commit = $co{'id'};
7967                 # we read 150, we always show 30 and the ones more recent than 48 hours
7968                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7969                         last;
7970                 }
7971                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7972
7973                 # get list of changed files
7974                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7975                         $co{'parent'} || "--root",
7976                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7977                         or next;
7978                 my @difftree = map { chomp; $_ } <$fd>;
7979                 close $fd
7980                         or next;
7981
7982                 # print element (entry, item)
7983                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7984                 if ($format eq 'rss') {
7985                         print "<item>\n" .
7986                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7987                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7988                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7989                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7990                               "<link>$co_url</link>\n" .
7991                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7992                               "<content:encoded>" .
7993                               "<![CDATA[\n";
7994                 } elsif ($format eq 'atom') {
7995                         print "<entry>\n" .
7996                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7997                               "<updated>$cd{'iso-8601'}</updated>\n" .
7998                               "<author>\n" .
7999                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8000                         if ($co{'author_email'}) {
8001                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8002                         }
8003                         print "</author>\n" .
8004                               # use committer for contributor
8005                               "<contributor>\n" .
8006                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8007                         if ($co{'committer_email'}) {
8008                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8009                         }
8010                         print "</contributor>\n" .
8011                               "<published>$cd{'iso-8601'}</published>\n" .
8012                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8013                               "<id>$co_url</id>\n" .
8014                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8015                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8016                 }
8017                 my $comment = $co{'comment'};
8018                 print "<pre>\n";
8019                 foreach my $line (@$comment) {
8020                         $line = esc_html($line);
8021                         print "$line\n";
8022                 }
8023                 print "</pre><ul>\n";
8024                 foreach my $difftree_line (@difftree) {
8025                         my %difftree = parse_difftree_raw_line($difftree_line);
8026                         next if !$difftree{'from_id'};
8027
8028                         my $file = $difftree{'file'} || $difftree{'to_file'};
8029
8030                         print "<li>" .
8031                               "[" .
8032                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8033                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8034                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8035                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8036                                       -title => "diff"}, 'D');
8037                         if ($have_blame) {
8038                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8039                                                              file_name=>$file, hash_base=>$commit),
8040                                               -title => "blame"}, 'B');
8041                         }
8042                         # if this is not a feed of a file history
8043                         if (!defined $file_name || $file_name ne $file) {
8044                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8045                                                              file_name=>$file, hash=>$commit),
8046                                               -title => "history"}, 'H');
8047                         }
8048                         $file = esc_path($file);
8049                         print "] ".
8050                               "$file</li>\n";
8051                 }
8052                 if ($format eq 'rss') {
8053                         print "</ul>]]>\n" .
8054                               "</content:encoded>\n" .
8055                               "</item>\n";
8056                 } elsif ($format eq 'atom') {
8057                         print "</ul>\n</div>\n" .
8058                               "</content>\n" .
8059                               "</entry>\n";
8060                 }
8061         }
8062
8063         # end of feed
8064         if ($format eq 'rss') {
8065                 print "</channel>\n</rss>\n";
8066         } elsif ($format eq 'atom') {
8067                 print "</feed>\n";
8068         }
8069 }
8070
8071 sub git_rss {
8072         git_feed('rss');
8073 }
8074
8075 sub git_atom {
8076         git_feed('atom');
8077 }
8078
8079 sub git_opml {
8080         my @list = git_get_projects_list($project_filter, $strict_export);
8081         if (!@list) {
8082                 die_error(404, "No projects found");
8083         }
8084
8085         print $cgi->header(
8086                 -type => 'text/xml',
8087                 -charset => 'utf-8',
8088                 -content_disposition => 'inline; filename="opml.xml"');
8089
8090         my $title = esc_html($site_name);
8091         my $filter = " within subdirectory ";
8092         if (defined $project_filter) {
8093                 $filter .= esc_html($project_filter);
8094         } else {
8095                 $filter = "";
8096         }
8097         print <<XML;
8098 <?xml version="1.0" encoding="utf-8"?>
8099 <opml version="1.0">
8100 <head>
8101   <title>$title OPML Export$filter</title>
8102 </head>
8103 <body>
8104 <outline text="git RSS feeds">
8105 XML
8106
8107         foreach my $pr (@list) {
8108                 my %proj = %$pr;
8109                 my $head = git_get_head_hash($proj{'path'});
8110                 if (!defined $head) {
8111                         next;
8112                 }
8113                 $git_dir = "$projectroot/$proj{'path'}";
8114                 my %co = parse_commit($head);
8115                 if (!%co) {
8116                         next;
8117                 }
8118
8119                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8120                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8121                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8122                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8123         }
8124         print <<XML;
8125 </outline>
8126 </body>
8127 </opml>
8128 XML
8129 }