Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95
  96 # URI of GIT logo (72x27 size)
  97 our $logo = "++GITWEB_LOGO++";
  98 # URI of GIT favicon, assumed to be image/png type
  99 our $favicon = "++GITWEB_FAVICON++";
 100 # URI of gitweb.js (JavaScript code for gitweb)
 101 our $javascript = "++GITWEB_JS++";
 102
 103 # URI and label (title) of GIT logo link
 104 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 105 #our $logo_label = "git documentation";
 106 our $logo_url = "http://git-scm.com/";
 107 our $logo_label = "git homepage";
 108
 109 # source of projects list
 110 our $projects_list = "++GITWEB_LIST++";
 111
 112 # the width (in characters) of the projects list "Description" column
 113 our $projects_list_description_width = 25;
 114
 115 # default order of projects list
 116 # valid values are none, project, descr, owner, and age
 117 our $default_projects_order = "project";
 118
 119 # show repository only if this file exists
 120 # (only effective if this variable evaluates to true)
 121 our $export_ok = "++GITWEB_EXPORT_OK++";
 122
 123 # show repository only if this subroutine returns true
 124 # when given the path to the project, for example:
 125 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 126 our $export_auth_hook = undef;
 127
 128 # only allow viewing of repositories also shown on the overview page
 129 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 130
 131 # list of git base URLs used for URL to where fetch project from,
 132 # i.e. full URL is "$git_base_url/$project"
 133 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 134
 135 # default blob_plain mimetype and default charset for text/plain blob
 136 our $default_blob_plain_mimetype = 'text/plain';
 137 our $default_text_plain_charset  = undef;
 138
 139 # file to use for guessing MIME types before trying /etc/mime.types
 140 # (relative to the current git repository)
 141 our $mimetypes_file = undef;
 142
 143 # assume this charset if line contains non-UTF-8 characters;
 144 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 145 # for which encoding all byte sequences are valid, for example
 146 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 147 # could be even 'utf-8' for the old behavior)
 148 our $fallback_encoding = 'latin1';
 149
 150 # rename detection options for git-diff and git-diff-tree
 151 # - default is '-M', with the cost proportional to
 152 #   (number of removed files) * (number of new files).
 153 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 154 #   (number of changed files + number of removed files) * (number of new files)
 155 # - even more costly is '-C', '--find-copies-harder' with cost
 156 #   (number of files in the original tree) * (number of new files)
 157 # - one might want to include '-B' option, e.g. '-B', '-M'
 158 our @diff_opts = ('-M'); # taken from git_commit
 159
 160 # Disables features that would allow repository owners to inject script into
 161 # the gitweb domain.
 162 our $prevent_xss = 0;
 163
 164 # information about snapshot formats that gitweb is capable of serving
 165 our %known_snapshot_formats = (
 166         # name => {
 167         #       'display' => display name,
 168         #       'type' => mime type,
 169         #       'suffix' => filename suffix,
 170         #       'format' => --format for git-archive,
 171         #       'compressor' => [compressor command and arguments]
 172         #                       (array reference, optional)
 173         #       'disabled' => boolean (optional)}
 174         #
 175         'tgz' => {
 176                 'display' => 'tar.gz',
 177                 'type' => 'application/x-gzip',
 178                 'suffix' => '.tar.gz',
 179                 'format' => 'tar',
 180                 'compressor' => ['gzip']},
 181
 182         'tbz2' => {
 183                 'display' => 'tar.bz2',
 184                 'type' => 'application/x-bzip2',
 185                 'suffix' => '.tar.bz2',
 186                 'format' => 'tar',
 187                 'compressor' => ['bzip2']},
 188
 189         'txz' => {
 190                 'display' => 'tar.xz',
 191                 'type' => 'application/x-xz',
 192                 'suffix' => '.tar.xz',
 193                 'format' => 'tar',
 194                 'compressor' => ['xz'],
 195                 'disabled' => 1},
 196
 197         'zip' => {
 198                 'display' => 'zip',
 199                 'type' => 'application/x-zip',
 200                 'suffix' => '.zip',
 201                 'format' => 'zip'},
 202 );
 203
 204 # Aliases so we understand old gitweb.snapshot values in repository
 205 # configuration.
 206 our %known_snapshot_format_aliases = (
 207         'gzip'  => 'tgz',
 208         'bzip2' => 'tbz2',
 209         'xz'    => 'txz',
 210
 211         # backward compatibility: legacy gitweb config support
 212         'x-gzip' => undef, 'gz' => undef,
 213         'x-bzip2' => undef, 'bz2' => undef,
 214         'x-zip' => undef, '' => undef,
 215 );
 216
 217 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 218 # are changed, it may be appropriate to change these values too via
 219 # $GITWEB_CONFIG.
 220 our %avatar_size = (
 221         'default' => 16,
 222         'double'  => 32
 223 );
 224
 225 # You define site-wide feature defaults here; override them with
 226 # $GITWEB_CONFIG as necessary.
 227 our %feature = (
 228         # feature => {
 229         #       'sub' => feature-sub (subroutine),
 230         #       'override' => allow-override (boolean),
 231         #       'default' => [ default options...] (array reference)}
 232         #
 233         # if feature is overridable (it means that allow-override has true value),
 234         # then feature-sub will be called with default options as parameters;
 235         # return value of feature-sub indicates if to enable specified feature
 236         #
 237         # if there is no 'sub' key (no feature-sub), then feature cannot be
 238         # overriden
 239         #
 240         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 241         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 242         # is enabled
 243
 244         # Enable the 'blame' blob view, showing the last commit that modified
 245         # each line in the file. This can be very CPU-intensive.
 246
 247         # To enable system wide have in $GITWEB_CONFIG
 248         # $feature{'blame'}{'default'} = [1];
 249         # To have project specific config enable override in $GITWEB_CONFIG
 250         # $feature{'blame'}{'override'} = 1;
 251         # and in project config gitweb.blame = 0|1;
 252         'blame' => {
 253                 'sub' => sub { feature_bool('blame', @_) },
 254                 'override' => 0,
 255                 'default' => [0]},
 256
 257         # Enable the 'snapshot' link, providing a compressed archive of any
 258         # tree. This can potentially generate high traffic if you have large
 259         # project.
 260
 261         # Value is a list of formats defined in %known_snapshot_formats that
 262         # you wish to offer.
 263         # To disable system wide have in $GITWEB_CONFIG
 264         # $feature{'snapshot'}{'default'} = [];
 265         # To have project specific config enable override in $GITWEB_CONFIG
 266         # $feature{'snapshot'}{'override'} = 1;
 267         # and in project config, a comma-separated list of formats or "none"
 268         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 269         'snapshot' => {
 270                 'sub' => \&feature_snapshot,
 271                 'override' => 0,
 272                 'default' => ['tgz']},
 273
 274         # Enable text search, which will list the commits which match author,
 275         # committer or commit text to a given string.  Enabled by default.
 276         # Project specific override is not supported.
 277         'search' => {
 278                 'override' => 0,
 279                 'default' => [1]},
 280
 281         # Enable grep search, which will list the files in currently selected
 282         # tree containing the given string. Enabled by default. This can be
 283         # potentially CPU-intensive, of course.
 284
 285         # To enable system wide have in $GITWEB_CONFIG
 286         # $feature{'grep'}{'default'} = [1];
 287         # To have project specific config enable override in $GITWEB_CONFIG
 288         # $feature{'grep'}{'override'} = 1;
 289         # and in project config gitweb.grep = 0|1;
 290         'grep' => {
 291                 'sub' => sub { feature_bool('grep', @_) },
 292                 'override' => 0,
 293                 'default' => [1]},
 294
 295         # Enable the pickaxe search, which will list the commits that modified
 296         # a given string in a file. This can be practical and quite faster
 297         # alternative to 'blame', but still potentially CPU-intensive.
 298
 299         # To enable system wide have in $GITWEB_CONFIG
 300         # $feature{'pickaxe'}{'default'} = [1];
 301         # To have project specific config enable override in $GITWEB_CONFIG
 302         # $feature{'pickaxe'}{'override'} = 1;
 303         # and in project config gitweb.pickaxe = 0|1;
 304         'pickaxe' => {
 305                 'sub' => sub { feature_bool('pickaxe', @_) },
 306                 'override' => 0,
 307                 'default' => [1]},
 308
 309         # Enable showing size of blobs in a 'tree' view, in a separate
 310         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 311
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'show-sizes'}{'default'} = [0];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'show-sizes'}{'override'} = 1;
 316         # and in project config gitweb.showsizes = 0|1;
 317         'show-sizes' => {
 318                 'sub' => sub { feature_bool('showsizes', @_) },
 319                 'override' => 0,
 320                 'default' => [1]},
 321
 322         # Make gitweb use an alternative format of the URLs which can be
 323         # more readable and natural-looking: project name is embedded
 324         # directly in the path and the query string contains other
 325         # auxiliary information. All gitweb installations recognize
 326         # URL in either format; this configures in which formats gitweb
 327         # generates links.
 328
 329         # To enable system wide have in $GITWEB_CONFIG
 330         # $feature{'pathinfo'}{'default'} = [1];
 331         # Project specific override is not supported.
 332
 333         # Note that you will need to change the default location of CSS,
 334         # favicon, logo and possibly other files to an absolute URL. Also,
 335         # if gitweb.cgi serves as your indexfile, you will need to force
 336         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 337         'pathinfo' => {
 338                 'override' => 0,
 339                 'default' => [0]},
 340
 341         # Make gitweb consider projects in project root subdirectories
 342         # to be forks of existing projects. Given project $projname.git,
 343         # projects matching $projname/*.git will not be shown in the main
 344         # projects list, instead a '+' mark will be added to $projname
 345         # there and a 'forks' view will be enabled for the project, listing
 346         # all the forks. If project list is taken from a file, forks have
 347         # to be listed after the main project.
 348
 349         # To enable system wide have in $GITWEB_CONFIG
 350         # $feature{'forks'}{'default'} = [1];
 351         # Project specific override is not supported.
 352         'forks' => {
 353                 'override' => 0,
 354                 'default' => [0]},
 355
 356         # Insert custom links to the action bar of all project pages.
 357         # This enables you mainly to link to third-party scripts integrating
 358         # into gitweb; e.g. git-browser for graphical history representation
 359         # or custom web-based repository administration interface.
 360
 361         # The 'default' value consists of a list of triplets in the form
 362         # (label, link, position) where position is the label after which
 363         # to insert the link and link is a format string where %n expands
 364         # to the project name, %f to the project path within the filesystem,
 365         # %h to the current hash (h gitweb parameter) and %b to the current
 366         # hash base (hb gitweb parameter); %% expands to %.
 367
 368         # To enable system wide have in $GITWEB_CONFIG e.g.
 369         # $feature{'actions'}{'default'} = [('graphiclog',
 370         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 371         # Project specific override is not supported.
 372         'actions' => {
 373                 'override' => 0,
 374                 'default' => []},
 375
 376         # Allow gitweb scan project content tags described in ctags/
 377         # of project repository, and display the popular Web 2.0-ish
 378         # "tag cloud" near the project list. Note that this is something
 379         # COMPLETELY different from the normal Git tags.
 380
 381         # gitweb by itself can show existing tags, but it does not handle
 382         # tagging itself; you need an external application for that.
 383         # For an example script, check Girocco's cgi/tagproj.cgi.
 384         # You may want to install the HTML::TagCloud Perl module to get
 385         # a pretty tag cloud instead of just a list of tags.
 386
 387         # To enable system wide have in $GITWEB_CONFIG
 388         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 389         # Project specific override is not supported.
 390         'ctags' => {
 391                 'override' => 0,
 392                 'default' => [0]},
 393
 394         # The maximum number of patches in a patchset generated in patch
 395         # view. Set this to 0 or undef to disable patch view, or to a
 396         # negative number to remove any limit.
 397
 398         # To disable system wide have in $GITWEB_CONFIG
 399         # $feature{'patches'}{'default'} = [0];
 400         # To have project specific config enable override in $GITWEB_CONFIG
 401         # $feature{'patches'}{'override'} = 1;
 402         # and in project config gitweb.patches = 0|n;
 403         # where n is the maximum number of patches allowed in a patchset.
 404         'patches' => {
 405                 'sub' => \&feature_patches,
 406                 'override' => 0,
 407                 'default' => [16]},
 408
 409         # Avatar support. When this feature is enabled, views such as
 410         # shortlog or commit will display an avatar associated with
 411         # the email of the committer(s) and/or author(s).
 412
 413         # Currently available providers are gravatar and picon.
 414         # If an unknown provider is specified, the feature is disabled.
 415
 416         # Gravatar depends on Digest::MD5.
 417         # Picon currently relies on the indiana.edu database.
 418
 419         # To enable system wide have in $GITWEB_CONFIG
 420         # $feature{'avatar'}{'default'} = ['<provider>'];
 421         # where <provider> is either gravatar or picon.
 422         # To have project specific config enable override in $GITWEB_CONFIG
 423         # $feature{'avatar'}{'override'} = 1;
 424         # and in project config gitweb.avatar = <provider>;
 425         'avatar' => {
 426                 'sub' => \&feature_avatar,
 427                 'override' => 0,
 428                 'default' => ['']},
 429
 430         # Enable displaying how much time and how many git commands
 431         # it took to generate and display page.  Disabled by default.
 432         # Project specific override is not supported.
 433         'timed' => {
 434                 'override' => 0,
 435                 'default' => [0]},
 436 );
 437
 438 sub gitweb_get_feature {
 439         my ($name) = @_;
 440         return unless exists $feature{$name};
 441         my ($sub, $override, @defaults) = (
 442                 $feature{$name}{'sub'},
 443                 $feature{$name}{'override'},
 444                 @{$feature{$name}{'default'}});
 445         if (!$override) { return @defaults; }
 446         if (!defined $sub) {
 447                 warn "feature $name is not overridable";
 448                 return @defaults;
 449         }
 450         return $sub->(@defaults);
 451 }
 452
 453 # A wrapper to check if a given feature is enabled.
 454 # With this, you can say
 455 #
 456 #   my $bool_feat = gitweb_check_feature('bool_feat');
 457 #   gitweb_check_feature('bool_feat') or somecode;
 458 #
 459 # instead of
 460 #
 461 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 462 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 463 #
 464 sub gitweb_check_feature {
 465         return (gitweb_get_feature(@_))[0];
 466 }
 467
 468
 469 sub feature_bool {
 470         my $key = shift;
 471         my ($val) = git_get_project_config($key, '--bool');
 472
 473         if (!defined $val) {
 474                 return ($_[0]);
 475         } elsif ($val eq 'true') {
 476                 return (1);
 477         } elsif ($val eq 'false') {
 478                 return (0);
 479         }
 480 }
 481
 482 sub feature_snapshot {
 483         my (@fmts) = @_;
 484
 485         my ($val) = git_get_project_config('snapshot');
 486
 487         if ($val) {
 488                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 489         }
 490
 491         return @fmts;
 492 }
 493
 494 sub feature_patches {
 495         my @val = (git_get_project_config('patches', '--int'));
 496
 497         if (@val) {
 498                 return @val;
 499         }
 500
 501         return ($_[0]);
 502 }
 503
 504 sub feature_avatar {
 505         my @val = (git_get_project_config('avatar'));
 506
 507         return @val ? @val : @_;
 508 }
 509
 510 # checking HEAD file with -e is fragile if the repository was
 511 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 512 # and then pruned.
 513 sub check_head_link {
 514         my ($dir) = @_;
 515         my $headfile = "$dir/HEAD";
 516         return ((-e $headfile) ||
 517                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 518 }
 519
 520 sub check_export_ok {
 521         my ($dir) = @_;
 522         return (check_head_link($dir) &&
 523                 (!$export_ok || -e "$dir/$export_ok") &&
 524                 (!$export_auth_hook || $export_auth_hook->($dir)));
 525 }
 526
 527 # process alternate names for backward compatibility
 528 # filter out unsupported (unknown) snapshot formats
 529 sub filter_snapshot_fmts {
 530         my @fmts = @_;
 531
 532         @fmts = map {
 533                 exists $known_snapshot_format_aliases{$_} ?
 534                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 535         @fmts = grep {
 536                 exists $known_snapshot_formats{$_} &&
 537                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 538 }
 539
 540 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 541 if (-e $GITWEB_CONFIG) {
 542         do $GITWEB_CONFIG;
 543 } else {
 544         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 545         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 546 }
 547
 548 # version of the core git binary
 549 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 550 $number_of_git_cmds++;
 551
 552 $projects_list ||= $projectroot;
 553
 554 # ======================================================================
 555 # input validation and dispatch
 556
 557 # input parameters can be collected from a variety of sources (presently, CGI
 558 # and PATH_INFO), so we define an %input_params hash that collects them all
 559 # together during validation: this allows subsequent uses (e.g. href()) to be
 560 # agnostic of the parameter origin
 561
 562 our %input_params = ();
 563
 564 # input parameters are stored with the long parameter name as key. This will
 565 # also be used in the href subroutine to convert parameters to their CGI
 566 # equivalent, and since the href() usage is the most frequent one, we store
 567 # the name -> CGI key mapping here, instead of the reverse.
 568 #
 569 # XXX: Warning: If you touch this, check the search form for updating,
 570 # too.
 571
 572 our @cgi_param_mapping = (
 573         project => "p",
 574         action => "a",
 575         file_name => "f",
 576         file_parent => "fp",
 577         hash => "h",
 578         hash_parent => "hp",
 579         hash_base => "hb",
 580         hash_parent_base => "hpb",
 581         page => "pg",
 582         order => "o",
 583         searchtext => "s",
 584         searchtype => "st",
 585         snapshot_format => "sf",
 586         extra_options => "opt",
 587         search_use_regexp => "sr",
 588         # this must be last entry (for manipulation from JavaScript)
 589         javascript => "js"
 590 );
 591 our %cgi_param_mapping = @cgi_param_mapping;
 592
 593 # we will also need to know the possible actions, for validation
 594 our %actions = (
 595         "blame" => \&git_blame,
 596         "blame_incremental" => \&git_blame_incremental,
 597         "blame_data" => \&git_blame_data,
 598         "blobdiff" => \&git_blobdiff,
 599         "blobdiff_plain" => \&git_blobdiff_plain,
 600         "blob" => \&git_blob,
 601         "blob_plain" => \&git_blob_plain,
 602         "commitdiff" => \&git_commitdiff,
 603         "commitdiff_plain" => \&git_commitdiff_plain,
 604         "commit" => \&git_commit,
 605         "forks" => \&git_forks,
 606         "heads" => \&git_heads,
 607         "history" => \&git_history,
 608         "log" => \&git_log,
 609         "patch" => \&git_patch,
 610         "patches" => \&git_patches,
 611         "rss" => \&git_rss,
 612         "atom" => \&git_atom,
 613         "search" => \&git_search,
 614         "search_help" => \&git_search_help,
 615         "shortlog" => \&git_shortlog,
 616         "summary" => \&git_summary,
 617         "tag" => \&git_tag,
 618         "tags" => \&git_tags,
 619         "tree" => \&git_tree,
 620         "snapshot" => \&git_snapshot,
 621         "object" => \&git_object,
 622         # those below don't need $project
 623         "opml" => \&git_opml,
 624         "project_list" => \&git_project_list,
 625         "project_index" => \&git_project_index,
 626 );
 627
 628 # finally, we have the hash of allowed extra_options for the commands that
 629 # allow them
 630 our %allowed_options = (
 631         "--no-merges" => [ qw(rss atom log shortlog history) ],
 632 );
 633
 634 # fill %input_params with the CGI parameters. All values except for 'opt'
 635 # should be single values, but opt can be an array. We should probably
 636 # build an array of parameters that can be multi-valued, but since for the time
 637 # being it's only this one, we just single it out
 638 while (my ($name, $symbol) = each %cgi_param_mapping) {
 639         if ($symbol eq 'opt') {
 640                 $input_params{$name} = [ $cgi->param($symbol) ];
 641         } else {
 642                 $input_params{$name} = $cgi->param($symbol);
 643         }
 644 }
 645
 646 # now read PATH_INFO and update the parameter list for missing parameters
 647 sub evaluate_path_info {
 648         return if defined $input_params{'project'};
 649         return if !$path_info;
 650         $path_info =~ s,^/+,,;
 651         return if !$path_info;
 652
 653         # find which part of PATH_INFO is project
 654         my $project = $path_info;
 655         $project =~ s,/+$,,;
 656         while ($project && !check_head_link("$projectroot/$project")) {
 657                 $project =~ s,/*[^/]*$,,;
 658         }
 659         return unless $project;
 660         $input_params{'project'} = $project;
 661
 662         # do not change any parameters if an action is given using the query string
 663         return if $input_params{'action'};
 664         $path_info =~ s,^\Q$project\E/*,,;
 665
 666         # next, check if we have an action
 667         my $action = $path_info;
 668         $action =~ s,/.*$,,;
 669         if (exists $actions{$action}) {
 670                 $path_info =~ s,^$action/*,,;
 671                 $input_params{'action'} = $action;
 672         }
 673
 674         # list of actions that want hash_base instead of hash, but can have no
 675         # pathname (f) parameter
 676         my @wants_base = (
 677                 'tree',
 678                 'history',
 679         );
 680
 681         # we want to catch
 682         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 683         my ($parentrefname, $parentpathname, $refname, $pathname) =
 684                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 685
 686         # first, analyze the 'current' part
 687         if (defined $pathname) {
 688                 # we got "branch:filename" or "branch:dir/"
 689                 # we could use git_get_type(branch:pathname), but:
 690                 # - it needs $git_dir
 691                 # - it does a git() call
 692                 # - the convention of terminating directories with a slash
 693                 #   makes it superfluous
 694                 # - embedding the action in the PATH_INFO would make it even
 695                 #   more superfluous
 696                 $pathname =~ s,^/+,,;
 697                 if (!$pathname || substr($pathname, -1) eq "/") {
 698                         $input_params{'action'} ||= "tree";
 699                         $pathname =~ s,/$,,;
 700                 } else {
 701                         # the default action depends on whether we had parent info
 702                         # or not
 703                         if ($parentrefname) {
 704                                 $input_params{'action'} ||= "blobdiff_plain";
 705                         } else {
 706                                 $input_params{'action'} ||= "blob_plain";
 707                         }
 708                 }
 709                 $input_params{'hash_base'} ||= $refname;
 710                 $input_params{'file_name'} ||= $pathname;
 711         } elsif (defined $refname) {
 712                 # we got "branch". In this case we have to choose if we have to
 713                 # set hash or hash_base.
 714                 #
 715                 # Most of the actions without a pathname only want hash to be
 716                 # set, except for the ones specified in @wants_base that want
 717                 # hash_base instead. It should also be noted that hand-crafted
 718                 # links having 'history' as an action and no pathname or hash
 719                 # set will fail, but that happens regardless of PATH_INFO.
 720                 $input_params{'action'} ||= "shortlog";
 721                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 722                         $input_params{'hash_base'} ||= $refname;
 723                 } else {
 724                         $input_params{'hash'} ||= $refname;
 725                 }
 726         }
 727
 728         # next, handle the 'parent' part, if present
 729         if (defined $parentrefname) {
 730                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 731                 # someproject/blobdiff/oldrev..newrev:/filename
 732                 if ($parentpathname) {
 733                         $parentpathname =~ s,^/+,,;
 734                         $parentpathname =~ s,/$,,;
 735                         $input_params{'file_parent'} ||= $parentpathname;
 736                 } else {
 737                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 738                 }
 739                 # we assume that hash_parent_base is wanted if a path was specified,
 740                 # or if the action wants hash_base instead of hash
 741                 if (defined $input_params{'file_parent'} ||
 742                         grep { $_ eq $input_params{'action'} } @wants_base) {
 743                         $input_params{'hash_parent_base'} ||= $parentrefname;
 744                 } else {
 745                         $input_params{'hash_parent'} ||= $parentrefname;
 746                 }
 747         }
 748
 749         # for the snapshot action, we allow URLs in the form
 750         # $project/snapshot/$hash.ext
 751         # where .ext determines the snapshot and gets removed from the
 752         # passed $refname to provide the $hash.
 753         #
 754         # To be able to tell that $refname includes the format extension, we
 755         # require the following two conditions to be satisfied:
 756         # - the hash input parameter MUST have been set from the $refname part
 757         #   of the URL (i.e. they must be equal)
 758         # - the snapshot format MUST NOT have been defined already (e.g. from
 759         #   CGI parameter sf)
 760         # It's also useless to try any matching unless $refname has a dot,
 761         # so we check for that too
 762         if (defined $input_params{'action'} &&
 763                 $input_params{'action'} eq 'snapshot' &&
 764                 defined $refname && index($refname, '.') != -1 &&
 765                 $refname eq $input_params{'hash'} &&
 766                 !defined $input_params{'snapshot_format'}) {
 767                 # We loop over the known snapshot formats, checking for
 768                 # extensions. Allowed extensions are both the defined suffix
 769                 # (which includes the initial dot already) and the snapshot
 770                 # format key itself, with a prepended dot
 771                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 772                         my $hash = $refname;
 773                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 774                                 next;
 775                         }
 776                         my $sfx = $1;
 777                         # a valid suffix was found, so set the snapshot format
 778                         # and reset the hash parameter
 779                         $input_params{'snapshot_format'} = $fmt;
 780                         $input_params{'hash'} = $hash;
 781                         # we also set the format suffix to the one requested
 782                         # in the URL: this way a request for e.g. .tgz returns
 783                         # a .tgz instead of a .tar.gz
 784                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 785                         last;
 786                 }
 787         }
 788 }
 789 evaluate_path_info();
 790
 791 our $action = $input_params{'action'};
 792 if (defined $action) {
 793         if (!validate_action($action)) {
 794                 die_error(400, "Invalid action parameter");
 795         }
 796 }
 797
 798 # parameters which are pathnames
 799 our $project = $input_params{'project'};
 800 if (defined $project) {
 801         if (!validate_project($project)) {
 802                 undef $project;
 803                 die_error(404, "No such project");
 804         }
 805 }
 806
 807 our $file_name = $input_params{'file_name'};
 808 if (defined $file_name) {
 809         if (!validate_pathname($file_name)) {
 810                 die_error(400, "Invalid file parameter");
 811         }
 812 }
 813
 814 our $file_parent = $input_params{'file_parent'};
 815 if (defined $file_parent) {
 816         if (!validate_pathname($file_parent)) {
 817                 die_error(400, "Invalid file parent parameter");
 818         }
 819 }
 820
 821 # parameters which are refnames
 822 our $hash = $input_params{'hash'};
 823 if (defined $hash) {
 824         if (!validate_refname($hash)) {
 825                 die_error(400, "Invalid hash parameter");
 826         }
 827 }
 828
 829 our $hash_parent = $input_params{'hash_parent'};
 830 if (defined $hash_parent) {
 831         if (!validate_refname($hash_parent)) {
 832                 die_error(400, "Invalid hash parent parameter");
 833         }
 834 }
 835
 836 our $hash_base = $input_params{'hash_base'};
 837 if (defined $hash_base) {
 838         if (!validate_refname($hash_base)) {
 839                 die_error(400, "Invalid hash base parameter");
 840         }
 841 }
 842
 843 our @extra_options = @{$input_params{'extra_options'}};
 844 # @extra_options is always defined, since it can only be (currently) set from
 845 # CGI, and $cgi->param() returns the empty array in array context if the param
 846 # is not set
 847 foreach my $opt (@extra_options) {
 848         if (not exists $allowed_options{$opt}) {
 849                 die_error(400, "Invalid option parameter");
 850         }
 851         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 852                 die_error(400, "Invalid option parameter for this action");
 853         }
 854 }
 855
 856 our $hash_parent_base = $input_params{'hash_parent_base'};
 857 if (defined $hash_parent_base) {
 858         if (!validate_refname($hash_parent_base)) {
 859                 die_error(400, "Invalid hash parent base parameter");
 860         }
 861 }
 862
 863 # other parameters
 864 our $page = $input_params{'page'};
 865 if (defined $page) {
 866         if ($page =~ m/[^0-9]/) {
 867                 die_error(400, "Invalid page parameter");
 868         }
 869 }
 870
 871 our $searchtype = $input_params{'searchtype'};
 872 if (defined $searchtype) {
 873         if ($searchtype =~ m/[^a-z]/) {
 874                 die_error(400, "Invalid searchtype parameter");
 875         }
 876 }
 877
 878 our $search_use_regexp = $input_params{'search_use_regexp'};
 879
 880 our $searchtext = $input_params{'searchtext'};
 881 our $search_regexp;
 882 if (defined $searchtext) {
 883         if (length($searchtext) < 2) {
 884                 die_error(403, "At least two characters are required for search parameter");
 885         }
 886         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 887 }
 888
 889 # path to the current git repository
 890 our $git_dir;
 891 $git_dir = "$projectroot/$project" if $project;
 892
 893 # list of supported snapshot formats
 894 our @snapshot_fmts = gitweb_get_feature('snapshot');
 895 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 896
 897 # check that the avatar feature is set to a known provider name,
 898 # and for each provider check if the dependencies are satisfied.
 899 # if the provider name is invalid or the dependencies are not met,
 900 # reset $git_avatar to the empty string.
 901 our ($git_avatar) = gitweb_get_feature('avatar');
 902 if ($git_avatar eq 'gravatar') {
 903         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 904 } elsif ($git_avatar eq 'picon') {
 905         # no dependencies
 906 } else {
 907         $git_avatar = '';
 908 }
 909
 910 # dispatch
 911 if (!defined $action) {
 912         if (defined $hash) {
 913                 $action = git_get_type($hash);
 914         } elsif (defined $hash_base && defined $file_name) {
 915                 $action = git_get_type("$hash_base:$file_name");
 916         } elsif (defined $project) {
 917                 $action = 'summary';
 918         } else {
 919                 $action = 'project_list';
 920         }
 921 }
 922 if (!defined($actions{$action})) {
 923         die_error(400, "Unknown action");
 924 }
 925 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 926     !$project) {
 927         die_error(400, "Project needed");
 928 }
 929 $actions{$action}->();
 930 exit;
 931
 932 ## ======================================================================
 933 ## action links
 934
 935 sub href {
 936         my %params = @_;
 937         # default is to use -absolute url() i.e. $my_uri
 938         my $href = $params{-full} ? $my_url : $my_uri;
 939
 940         $params{'project'} = $project unless exists $params{'project'};
 941
 942         if ($params{-replay}) {
 943                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 944                         if (!exists $params{$name}) {
 945                                 $params{$name} = $input_params{$name};
 946                         }
 947                 }
 948         }
 949
 950         my $use_pathinfo = gitweb_check_feature('pathinfo');
 951         if ($use_pathinfo and defined $params{'project'}) {
 952                 # try to put as many parameters as possible in PATH_INFO:
 953                 #   - project name
 954                 #   - action
 955                 #   - hash_parent or hash_parent_base:/file_parent
 956                 #   - hash or hash_base:/filename
 957                 #   - the snapshot_format as an appropriate suffix
 958
 959                 # When the script is the root DirectoryIndex for the domain,
 960                 # $href here would be something like http://gitweb.example.com/
 961                 # Thus, we strip any trailing / from $href, to spare us double
 962                 # slashes in the final URL
 963                 $href =~ s,/$,,;
 964
 965                 # Then add the project name, if present
 966                 $href .= "/".esc_url($params{'project'});
 967                 delete $params{'project'};
 968
 969                 # since we destructively absorb parameters, we keep this
 970                 # boolean that remembers if we're handling a snapshot
 971                 my $is_snapshot = $params{'action'} eq 'snapshot';
 972
 973                 # Summary just uses the project path URL, any other action is
 974                 # added to the URL
 975                 if (defined $params{'action'}) {
 976                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 977                         delete $params{'action'};
 978                 }
 979
 980                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 981                 # stripping nonexistent or useless pieces
 982                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 983                         || $params{'hash_parent'} || $params{'hash'});
 984                 if (defined $params{'hash_base'}) {
 985                         if (defined $params{'hash_parent_base'}) {
 986                                 $href .= esc_url($params{'hash_parent_base'});
 987                                 # skip the file_parent if it's the same as the file_name
 988                                 if (defined $params{'file_parent'}) {
 989                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 990                                                 delete $params{'file_parent'};
 991                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 992                                                 $href .= ":/".esc_url($params{'file_parent'});
 993                                                 delete $params{'file_parent'};
 994                                         }
 995                                 }
 996                                 $href .= "..";
 997                                 delete $params{'hash_parent'};
 998                                 delete $params{'hash_parent_base'};
 999                         } elsif (defined $params{'hash_parent'}) {
1000                                 $href .= esc_url($params{'hash_parent'}). "..";
1001                                 delete $params{'hash_parent'};
1002                         }
1003
1004                         $href .= esc_url($params{'hash_base'});
1005                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1006                                 $href .= ":/".esc_url($params{'file_name'});
1007                                 delete $params{'file_name'};
1008                         }
1009                         delete $params{'hash'};
1010                         delete $params{'hash_base'};
1011                 } elsif (defined $params{'hash'}) {
1012                         $href .= esc_url($params{'hash'});
1013                         delete $params{'hash'};
1014                 }
1015
1016                 # If the action was a snapshot, we can absorb the
1017                 # snapshot_format parameter too
1018                 if ($is_snapshot) {
1019                         my $fmt = $params{'snapshot_format'};
1020                         # snapshot_format should always be defined when href()
1021                         # is called, but just in case some code forgets, we
1022                         # fall back to the default
1023                         $fmt ||= $snapshot_fmts[0];
1024                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1025                         delete $params{'snapshot_format'};
1026                 }
1027         }
1028
1029         # now encode the parameters explicitly
1030         my @result = ();
1031         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1032                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1033                 if (defined $params{$name}) {
1034                         if (ref($params{$name}) eq "ARRAY") {
1035                                 foreach my $par (@{$params{$name}}) {
1036                                         push @result, $symbol . "=" . esc_param($par);
1037                                 }
1038                         } else {
1039                                 push @result, $symbol . "=" . esc_param($params{$name});
1040                         }
1041                 }
1042         }
1043         $href .= "?" . join(';', @result) if scalar @result;
1044
1045         return $href;
1046 }
1047
1048
1049 ## ======================================================================
1050 ## validation, quoting/unquoting and escaping
1051
1052 sub validate_action {
1053         my $input = shift || return undef;
1054         return undef unless exists $actions{$input};
1055         return $input;
1056 }
1057
1058 sub validate_project {
1059         my $input = shift || return undef;
1060         if (!validate_pathname($input) ||
1061                 !(-d "$projectroot/$input") ||
1062                 !check_export_ok("$projectroot/$input") ||
1063                 ($strict_export && !project_in_list($input))) {
1064                 return undef;
1065         } else {
1066                 return $input;
1067         }
1068 }
1069
1070 sub validate_pathname {
1071         my $input = shift || return undef;
1072
1073         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1074         # at the beginning, at the end, and between slashes.
1075         # also this catches doubled slashes
1076         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1077                 return undef;
1078         }
1079         # no null characters
1080         if ($input =~ m!\0!) {
1081                 return undef;
1082         }
1083         return $input;
1084 }
1085
1086 sub validate_refname {
1087         my $input = shift || return undef;
1088
1089         # textual hashes are O.K.
1090         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1091                 return $input;
1092         }
1093         # it must be correct pathname
1094         $input = validate_pathname($input)
1095                 or return undef;
1096         # restrictions on ref name according to git-check-ref-format
1097         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1098                 return undef;
1099         }
1100         return $input;
1101 }
1102
1103 # decode sequences of octets in utf8 into Perl's internal form,
1104 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1105 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1106 sub to_utf8 {
1107         my $str = shift;
1108         if (utf8::valid($str)) {
1109                 utf8::decode($str);
1110                 return $str;
1111         } else {
1112                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1113         }
1114 }
1115
1116 # quote unsafe chars, but keep the slash, even when it's not
1117 # correct, but quoted slashes look too horrible in bookmarks
1118 sub esc_param {
1119         my $str = shift;
1120         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1121         $str =~ s/ /\+/g;
1122         return $str;
1123 }
1124
1125 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1126 sub esc_url {
1127         my $str = shift;
1128         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1129         $str =~ s/\+/%2B/g;
1130         $str =~ s/ /\+/g;
1131         return $str;
1132 }
1133
1134 # replace invalid utf8 character with SUBSTITUTION sequence
1135 sub esc_html {
1136         my $str = shift;
1137         my %opts = @_;
1138
1139         $str = to_utf8($str);
1140         $str = $cgi->escapeHTML($str);
1141         if ($opts{'-nbsp'}) {
1142                 $str =~ s/ /&nbsp;/g;
1143         }
1144         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1145         return $str;
1146 }
1147
1148 # quote control characters and escape filename to HTML
1149 sub esc_path {
1150         my $str = shift;
1151         my %opts = @_;
1152
1153         $str = to_utf8($str);
1154         $str = $cgi->escapeHTML($str);
1155         if ($opts{'-nbsp'}) {
1156                 $str =~ s/ /&nbsp;/g;
1157         }
1158         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1159         return $str;
1160 }
1161
1162 # Make control characters "printable", using character escape codes (CEC)
1163 sub quot_cec {
1164         my $cntrl = shift;
1165         my %opts = @_;
1166         my %es = ( # character escape codes, aka escape sequences
1167                 "\t" => '\t',   # tab            (HT)
1168                 "\n" => '\n',   # line feed      (LF)
1169                 "\r" => '\r',   # carrige return (CR)
1170                 "\f" => '\f',   # form feed      (FF)
1171                 "\b" => '\b',   # backspace      (BS)
1172                 "\a" => '\a',   # alarm (bell)   (BEL)
1173                 "\e" => '\e',   # escape         (ESC)
1174                 "\013" => '\v', # vertical tab   (VT)
1175                 "\000" => '\0', # nul character  (NUL)
1176         );
1177         my $chr = ( (exists $es{$cntrl})
1178                     ? $es{$cntrl}
1179                     : sprintf('\%2x', ord($cntrl)) );
1180         if ($opts{-nohtml}) {
1181                 return $chr;
1182         } else {
1183                 return "<span class=\"cntrl\">$chr</span>";
1184         }
1185 }
1186
1187 # Alternatively use unicode control pictures codepoints,
1188 # Unicode "printable representation" (PR)
1189 sub quot_upr {
1190         my $cntrl = shift;
1191         my %opts = @_;
1192
1193         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1194         if ($opts{-nohtml}) {
1195                 return $chr;
1196         } else {
1197                 return "<span class=\"cntrl\">$chr</span>";
1198         }
1199 }
1200
1201 # git may return quoted and escaped filenames
1202 sub unquote {
1203         my $str = shift;
1204
1205         sub unq {
1206                 my $seq = shift;
1207                 my %es = ( # character escape codes, aka escape sequences
1208                         't' => "\t",   # tab            (HT, TAB)
1209                         'n' => "\n",   # newline        (NL)
1210                         'r' => "\r",   # return         (CR)
1211                         'f' => "\f",   # form feed      (FF)
1212                         'b' => "\b",   # backspace      (BS)
1213                         'a' => "\a",   # alarm (bell)   (BEL)
1214                         'e' => "\e",   # escape         (ESC)
1215                         'v' => "\013", # vertical tab   (VT)
1216                 );
1217
1218                 if ($seq =~ m/^[0-7]{1,3}$/) {
1219                         # octal char sequence
1220                         return chr(oct($seq));
1221                 } elsif (exists $es{$seq}) {
1222                         # C escape sequence, aka character escape code
1223                         return $es{$seq};
1224                 }
1225                 # quoted ordinary character
1226                 return $seq;
1227         }
1228
1229         if ($str =~ m/^"(.*)"$/) {
1230                 # needs unquoting
1231                 $str = $1;
1232                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1233         }
1234         return $str;
1235 }
1236
1237 # escape tabs (convert tabs to spaces)
1238 sub untabify {
1239         my $line = shift;
1240
1241         while ((my $pos = index($line, "\t")) != -1) {
1242                 if (my $count = (8 - ($pos % 8))) {
1243                         my $spaces = ' ' x $count;
1244                         $line =~ s/\t/$spaces/;
1245                 }
1246         }
1247
1248         return $line;
1249 }
1250
1251 sub project_in_list {
1252         my $project = shift;
1253         my @list = git_get_projects_list();
1254         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1255 }
1256
1257 ## ----------------------------------------------------------------------
1258 ## HTML aware string manipulation
1259
1260 # Try to chop given string on a word boundary between position
1261 # $len and $len+$add_len. If there is no word boundary there,
1262 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1263 # (marking chopped part) would be longer than given string.
1264 sub chop_str {
1265         my $str = shift;
1266         my $len = shift;
1267         my $add_len = shift || 10;
1268         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1269
1270         # Make sure perl knows it is utf8 encoded so we don't
1271         # cut in the middle of a utf8 multibyte char.
1272         $str = to_utf8($str);
1273
1274         # allow only $len chars, but don't cut a word if it would fit in $add_len
1275         # if it doesn't fit, cut it if it's still longer than the dots we would add
1276         # remove chopped character entities entirely
1277
1278         # when chopping in the middle, distribute $len into left and right part
1279         # return early if chopping wouldn't make string shorter
1280         if ($where eq 'center') {
1281                 return $str if ($len + 5 >= length($str)); # filler is length 5
1282                 $len = int($len/2);
1283         } else {
1284                 return $str if ($len + 4 >= length($str)); # filler is length 4
1285         }
1286
1287         # regexps: ending and beginning with word part up to $add_len
1288         my $endre = qr/.{$len}\w{0,$add_len}/;
1289         my $begre = qr/\w{0,$add_len}.{$len}/;
1290
1291         if ($where eq 'left') {
1292                 $str =~ m/^(.*?)($begre)$/;
1293                 my ($lead, $body) = ($1, $2);
1294                 if (length($lead) > 4) {
1295                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1296                         $lead = " ...";
1297                 }
1298                 return "$lead$body";
1299
1300         } elsif ($where eq 'center') {
1301                 $str =~ m/^($endre)(.*)$/;
1302                 my ($left, $str)  = ($1, $2);
1303                 $str =~ m/^(.*?)($begre)$/;
1304                 my ($mid, $right) = ($1, $2);
1305                 if (length($mid) > 5) {
1306                         $left  =~ s/&[^;]*$//;
1307                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1308                         $mid = " ... ";
1309                 }
1310                 return "$left$mid$right";
1311
1312         } else {
1313                 $str =~ m/^($endre)(.*)$/;
1314                 my $body = $1;
1315                 my $tail = $2;
1316                 if (length($tail) > 4) {
1317                         $body =~ s/&[^;]*$//;
1318                         $tail = "... ";
1319                 }
1320                 return "$body$tail";
1321         }
1322 }
1323
1324 # takes the same arguments as chop_str, but also wraps a <span> around the
1325 # result with a title attribute if it does get chopped. Additionally, the
1326 # string is HTML-escaped.
1327 sub chop_and_escape_str {
1328         my ($str) = @_;
1329
1330         my $chopped = chop_str(@_);
1331         if ($chopped eq $str) {
1332                 return esc_html($chopped);
1333         } else {
1334                 $str =~ s/[[:cntrl:]]/?/g;
1335                 return $cgi->span({-title=>$str}, esc_html($chopped));
1336         }
1337 }
1338
1339 ## ----------------------------------------------------------------------
1340 ## functions returning short strings
1341
1342 # CSS class for given age value (in seconds)
1343 sub age_class {
1344         my $age = shift;
1345
1346         if (!defined $age) {
1347                 return "noage";
1348         } elsif ($age < 60*60*2) {
1349                 return "age0";
1350         } elsif ($age < 60*60*24*2) {
1351                 return "age1";
1352         } else {
1353                 return "age2";
1354         }
1355 }
1356
1357 # convert age in seconds to "nn units ago" string
1358 sub age_string {
1359         my $age = shift;
1360         my $age_str;
1361
1362         if ($age > 60*60*24*365*2) {
1363                 $age_str = (int $age/60/60/24/365);
1364                 $age_str .= " years ago";
1365         } elsif ($age > 60*60*24*(365/12)*2) {
1366                 $age_str = int $age/60/60/24/(365/12);
1367                 $age_str .= " months ago";
1368         } elsif ($age > 60*60*24*7*2) {
1369                 $age_str = int $age/60/60/24/7;
1370                 $age_str .= " weeks ago";
1371         } elsif ($age > 60*60*24*2) {
1372                 $age_str = int $age/60/60/24;
1373                 $age_str .= " days ago";
1374         } elsif ($age > 60*60*2) {
1375                 $age_str = int $age/60/60;
1376                 $age_str .= " hours ago";
1377         } elsif ($age > 60*2) {
1378                 $age_str = int $age/60;
1379                 $age_str .= " min ago";
1380         } elsif ($age > 2) {
1381                 $age_str = int $age;
1382                 $age_str .= " sec ago";
1383         } else {
1384                 $age_str .= " right now";
1385         }
1386         return $age_str;
1387 }
1388
1389 use constant {
1390         S_IFINVALID => 0030000,
1391         S_IFGITLINK => 0160000,
1392 };
1393
1394 # submodule/subproject, a commit object reference
1395 sub S_ISGITLINK {
1396         my $mode = shift;
1397
1398         return (($mode & S_IFMT) == S_IFGITLINK)
1399 }
1400
1401 # convert file mode in octal to symbolic file mode string
1402 sub mode_str {
1403         my $mode = oct shift;
1404
1405         if (S_ISGITLINK($mode)) {
1406                 return 'm---------';
1407         } elsif (S_ISDIR($mode & S_IFMT)) {
1408                 return 'drwxr-xr-x';
1409         } elsif (S_ISLNK($mode)) {
1410                 return 'lrwxrwxrwx';
1411         } elsif (S_ISREG($mode)) {
1412                 # git cares only about the executable bit
1413                 if ($mode & S_IXUSR) {
1414                         return '-rwxr-xr-x';
1415                 } else {
1416                         return '-rw-r--r--';
1417                 };
1418         } else {
1419                 return '----------';
1420         }
1421 }
1422
1423 # convert file mode in octal to file type string
1424 sub file_type {
1425         my $mode = shift;
1426
1427         if ($mode !~ m/^[0-7]+$/) {
1428                 return $mode;
1429         } else {
1430                 $mode = oct $mode;
1431         }
1432
1433         if (S_ISGITLINK($mode)) {
1434                 return "submodule";
1435         } elsif (S_ISDIR($mode & S_IFMT)) {
1436                 return "directory";
1437         } elsif (S_ISLNK($mode)) {
1438                 return "symlink";
1439         } elsif (S_ISREG($mode)) {
1440                 return "file";
1441         } else {
1442                 return "unknown";
1443         }
1444 }
1445
1446 # convert file mode in octal to file type description string
1447 sub file_type_long {
1448         my $mode = shift;
1449
1450         if ($mode !~ m/^[0-7]+$/) {
1451                 return $mode;
1452         } else {
1453                 $mode = oct $mode;
1454         }
1455
1456         if (S_ISGITLINK($mode)) {
1457                 return "submodule";
1458         } elsif (S_ISDIR($mode & S_IFMT)) {
1459                 return "directory";
1460         } elsif (S_ISLNK($mode)) {
1461                 return "symlink";
1462         } elsif (S_ISREG($mode)) {
1463                 if ($mode & S_IXUSR) {
1464                         return "executable";
1465                 } else {
1466                         return "file";
1467                 };
1468         } else {
1469                 return "unknown";
1470         }
1471 }
1472
1473
1474 ## ----------------------------------------------------------------------
1475 ## functions returning short HTML fragments, or transforming HTML fragments
1476 ## which don't belong to other sections
1477
1478 # format line of commit message.
1479 sub format_log_line_html {
1480         my $line = shift;
1481
1482         $line = esc_html($line, -nbsp=>1);
1483         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1484                 $cgi->a({-href => href(action=>"object", hash=>$1),
1485                                         -class => "text"}, $1);
1486         }eg;
1487
1488         return $line;
1489 }
1490
1491 # format marker of refs pointing to given object
1492
1493 # the destination action is chosen based on object type and current context:
1494 # - for annotated tags, we choose the tag view unless it's the current view
1495 #   already, in which case we go to shortlog view
1496 # - for other refs, we keep the current view if we're in history, shortlog or
1497 #   log view, and select shortlog otherwise
1498 sub format_ref_marker {
1499         my ($refs, $id) = @_;
1500         my $markers = '';
1501
1502         if (defined $refs->{$id}) {
1503                 foreach my $ref (@{$refs->{$id}}) {
1504                         # this code exploits the fact that non-lightweight tags are the
1505                         # only indirect objects, and that they are the only objects for which
1506                         # we want to use tag instead of shortlog as action
1507                         my ($type, $name) = qw();
1508                         my $indirect = ($ref =~ s/\^\{\}$//);
1509                         # e.g. tags/v2.6.11 or heads/next
1510                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1511                                 $type = $1;
1512                                 $name = $2;
1513                         } else {
1514                                 $type = "ref";
1515                                 $name = $ref;
1516                         }
1517
1518                         my $class = $type;
1519                         $class .= " indirect" if $indirect;
1520
1521                         my $dest_action = "shortlog";
1522
1523                         if ($indirect) {
1524                                 $dest_action = "tag" unless $action eq "tag";
1525                         } elsif ($action =~ /^(history|(short)?log)$/) {
1526                                 $dest_action = $action;
1527                         }
1528
1529                         my $dest = "";
1530                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1531                         $dest .= $ref;
1532
1533                         my $link = $cgi->a({
1534                                 -href => href(
1535                                         action=>$dest_action,
1536                                         hash=>$dest
1537                                 )}, $name);
1538
1539                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1540                                 $link . "</span>";
1541                 }
1542         }
1543
1544         if ($markers) {
1545                 return ' <span class="refs">'. $markers . '</span>';
1546         } else {
1547                 return "";
1548         }
1549 }
1550
1551 # format, perhaps shortened and with markers, title line
1552 sub format_subject_html {
1553         my ($long, $short, $href, $extra) = @_;
1554         $extra = '' unless defined($extra);
1555
1556         if (length($short) < length($long)) {
1557                 $long =~ s/[[:cntrl:]]/?/g;
1558                 return $cgi->a({-href => $href, -class => "list subject",
1559                                 -title => to_utf8($long)},
1560                        esc_html($short)) . $extra;
1561         } else {
1562                 return $cgi->a({-href => $href, -class => "list subject"},
1563                        esc_html($long)) . $extra;
1564         }
1565 }
1566
1567 # Rather than recomputing the url for an email multiple times, we cache it
1568 # after the first hit. This gives a visible benefit in views where the avatar
1569 # for the same email is used repeatedly (e.g. shortlog).
1570 # The cache is shared by all avatar engines (currently gravatar only), which
1571 # are free to use it as preferred. Since only one avatar engine is used for any
1572 # given page, there's no risk for cache conflicts.
1573 our %avatar_cache = ();
1574
1575 # Compute the picon url for a given email, by using the picon search service over at
1576 # http://www.cs.indiana.edu/picons/search.html
1577 sub picon_url {
1578         my $email = lc shift;
1579         if (!$avatar_cache{$email}) {
1580                 my ($user, $domain) = split('@', $email);
1581                 $avatar_cache{$email} =
1582                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1583                         "$domain/$user/" .
1584                         "users+domains+unknown/up/single";
1585         }
1586         return $avatar_cache{$email};
1587 }
1588
1589 # Compute the gravatar url for a given email, if it's not in the cache already.
1590 # Gravatar stores only the part of the URL before the size, since that's the
1591 # one computationally more expensive. This also allows reuse of the cache for
1592 # different sizes (for this particular engine).
1593 sub gravatar_url {
1594         my $email = lc shift;
1595         my $size = shift;
1596         $avatar_cache{$email} ||=
1597                 "http://www.gravatar.com/avatar/" .
1598                         Digest::MD5::md5_hex($email) . "?s=";
1599         return $avatar_cache{$email} . $size;
1600 }
1601
1602 # Insert an avatar for the given $email at the given $size if the feature
1603 # is enabled.
1604 sub git_get_avatar {
1605         my ($email, %opts) = @_;
1606         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1607         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1608         $opts{-size} ||= 'default';
1609         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1610         my $url = "";
1611         if ($git_avatar eq 'gravatar') {
1612                 $url = gravatar_url($email, $size);
1613         } elsif ($git_avatar eq 'picon') {
1614                 $url = picon_url($email);
1615         }
1616         # Other providers can be added by extending the if chain, defining $url
1617         # as needed. If no variant puts something in $url, we assume avatars
1618         # are completely disabled/unavailable.
1619         if ($url) {
1620                 return $pre_white .
1621                        "<img width=\"$size\" " .
1622                             "class=\"avatar\" " .
1623                             "src=\"$url\" " .
1624                             "alt=\"\" " .
1625                        "/>" . $post_white;
1626         } else {
1627                 return "";
1628         }
1629 }
1630
1631 sub format_search_author {
1632         my ($author, $searchtype, $displaytext) = @_;
1633         my $have_search = gitweb_check_feature('search');
1634
1635         if ($have_search) {
1636                 my $performed = "";
1637                 if ($searchtype eq 'author') {
1638                         $performed = "authored";
1639                 } elsif ($searchtype eq 'committer') {
1640                         $performed = "committed";
1641                 }
1642
1643                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1644                                 searchtext=>$author,
1645                                 searchtype=>$searchtype), class=>"list",
1646                                 title=>"Search for commits $performed by $author"},
1647                                 $displaytext);
1648
1649         } else {
1650                 return $displaytext;
1651         }
1652 }
1653
1654 # format the author name of the given commit with the given tag
1655 # the author name is chopped and escaped according to the other
1656 # optional parameters (see chop_str).
1657 sub format_author_html {
1658         my $tag = shift;
1659         my $co = shift;
1660         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1661         return "<$tag class=\"author\">" .
1662                format_search_author($co->{'author_name'}, "author",
1663                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1664                        $author) .
1665                "</$tag>";
1666 }
1667
1668 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1669 sub format_git_diff_header_line {
1670         my $line = shift;
1671         my $diffinfo = shift;
1672         my ($from, $to) = @_;
1673
1674         if ($diffinfo->{'nparents'}) {
1675                 # combined diff
1676                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1677                 if ($to->{'href'}) {
1678                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1679                                          esc_path($to->{'file'}));
1680                 } else { # file was deleted (no href)
1681                         $line .= esc_path($to->{'file'});
1682                 }
1683         } else {
1684                 # "ordinary" diff
1685                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1686                 if ($from->{'href'}) {
1687                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1688                                          'a/' . esc_path($from->{'file'}));
1689                 } else { # file was added (no href)
1690                         $line .= 'a/' . esc_path($from->{'file'});
1691                 }
1692                 $line .= ' ';
1693                 if ($to->{'href'}) {
1694                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1695                                          'b/' . esc_path($to->{'file'}));
1696                 } else { # file was deleted
1697                         $line .= 'b/' . esc_path($to->{'file'});
1698                 }
1699         }
1700
1701         return "<div class=\"diff header\">$line</div>\n";
1702 }
1703
1704 # format extended diff header line, before patch itself
1705 sub format_extended_diff_header_line {
1706         my $line = shift;
1707         my $diffinfo = shift;
1708         my ($from, $to) = @_;
1709
1710         # match <path>
1711         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1712                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1713                                        esc_path($from->{'file'}));
1714         }
1715         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1716                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1717                                  esc_path($to->{'file'}));
1718         }
1719         # match single <mode>
1720         if ($line =~ m/\s(\d{6})$/) {
1721                 $line .= '<span class="info"> (' .
1722                          file_type_long($1) .
1723                          ')</span>';
1724         }
1725         # match <hash>
1726         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1727                 # can match only for combined diff
1728                 $line = 'index ';
1729                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1730                         if ($from->{'href'}[$i]) {
1731                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1732                                                   -class=>"hash"},
1733                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1734                         } else {
1735                                 $line .= '0' x 7;
1736                         }
1737                         # separator
1738                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1739                 }
1740                 $line .= '..';
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1743                                          substr($diffinfo->{'to_id'},0,7));
1744                 } else {
1745                         $line .= '0' x 7;
1746                 }
1747
1748         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1749                 # can match only for ordinary diff
1750                 my ($from_link, $to_link);
1751                 if ($from->{'href'}) {
1752                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1753                                              substr($diffinfo->{'from_id'},0,7));
1754                 } else {
1755                         $from_link = '0' x 7;
1756                 }
1757                 if ($to->{'href'}) {
1758                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1759                                            substr($diffinfo->{'to_id'},0,7));
1760                 } else {
1761                         $to_link = '0' x 7;
1762                 }
1763                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1764                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1765         }
1766
1767         return $line . "<br/>\n";
1768 }
1769
1770 # format from-file/to-file diff header
1771 sub format_diff_from_to_header {
1772         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1773         my $line;
1774         my $result = '';
1775
1776         $line = $from_line;
1777         #assert($line =~ m/^---/) if DEBUG;
1778         # no extra formatting for "^--- /dev/null"
1779         if (! $diffinfo->{'nparents'}) {
1780                 # ordinary (single parent) diff
1781                 if ($line =~ m!^--- "?a/!) {
1782                         if ($from->{'href'}) {
1783                                 $line = '--- a/' .
1784                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1785                                                 esc_path($from->{'file'}));
1786                         } else {
1787                                 $line = '--- a/' .
1788                                         esc_path($from->{'file'});
1789                         }
1790                 }
1791                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1792
1793         } else {
1794                 # combined diff (merge commit)
1795                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1796                         if ($from->{'href'}[$i]) {
1797                                 $line = '--- ' .
1798                                         $cgi->a({-href=>href(action=>"blobdiff",
1799                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1800                                                              hash_parent_base=>$parents[$i],
1801                                                              file_parent=>$from->{'file'}[$i],
1802                                                              hash=>$diffinfo->{'to_id'},
1803                                                              hash_base=>$hash,
1804                                                              file_name=>$to->{'file'}),
1805                                                  -class=>"path",
1806                                                  -title=>"diff" . ($i+1)},
1807                                                 $i+1) .
1808                                         '/' .
1809                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1810                                                 esc_path($from->{'file'}[$i]));
1811                         } else {
1812                                 $line = '--- /dev/null';
1813                         }
1814                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1815                 }
1816         }
1817
1818         $line = $to_line;
1819         #assert($line =~ m/^\+\+\+/) if DEBUG;
1820         # no extra formatting for "^+++ /dev/null"
1821         if ($line =~ m!^\+\+\+ "?b/!) {
1822                 if ($to->{'href'}) {
1823                         $line = '+++ b/' .
1824                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1825                                         esc_path($to->{'file'}));
1826                 } else {
1827                         $line = '+++ b/' .
1828                                 esc_path($to->{'file'});
1829                 }
1830         }
1831         $result .= qq!<div class="diff to_file">$line</div>\n!;
1832
1833         return $result;
1834 }
1835
1836 # create note for patch simplified by combined diff
1837 sub format_diff_cc_simplified {
1838         my ($diffinfo, @parents) = @_;
1839         my $result = '';
1840
1841         $result .= "<div class=\"diff header\">" .
1842                    "diff --cc ";
1843         if (!is_deleted($diffinfo)) {
1844                 $result .= $cgi->a({-href => href(action=>"blob",
1845                                                   hash_base=>$hash,
1846                                                   hash=>$diffinfo->{'to_id'},
1847                                                   file_name=>$diffinfo->{'to_file'}),
1848                                     -class => "path"},
1849                                    esc_path($diffinfo->{'to_file'}));
1850         } else {
1851                 $result .= esc_path($diffinfo->{'to_file'});
1852         }
1853         $result .= "</div>\n" . # class="diff header"
1854                    "<div class=\"diff nodifferences\">" .
1855                    "Simple merge" .
1856                    "</div>\n"; # class="diff nodifferences"
1857
1858         return $result;
1859 }
1860
1861 # format patch (diff) line (not to be used for diff headers)
1862 sub format_diff_line {
1863         my $line = shift;
1864         my ($from, $to) = @_;
1865         my $diff_class = "";
1866
1867         chomp $line;
1868
1869         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1870                 # combined diff
1871                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1872                 if ($line =~ m/^\@{3}/) {
1873                         $diff_class = " chunk_header";
1874                 } elsif ($line =~ m/^\\/) {
1875                         $diff_class = " incomplete";
1876                 } elsif ($prefix =~ tr/+/+/) {
1877                         $diff_class = " add";
1878                 } elsif ($prefix =~ tr/-/-/) {
1879                         $diff_class = " rem";
1880                 }
1881         } else {
1882                 # assume ordinary diff
1883                 my $char = substr($line, 0, 1);
1884                 if ($char eq '+') {
1885                         $diff_class = " add";
1886                 } elsif ($char eq '-') {
1887                         $diff_class = " rem";
1888                 } elsif ($char eq '@') {
1889                         $diff_class = " chunk_header";
1890                 } elsif ($char eq "\\") {
1891                         $diff_class = " incomplete";
1892                 }
1893         }
1894         $line = untabify($line);
1895         if ($from && $to && $line =~ m/^\@{2} /) {
1896                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1897                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1898
1899                 $from_lines = 0 unless defined $from_lines;
1900                 $to_lines   = 0 unless defined $to_lines;
1901
1902                 if ($from->{'href'}) {
1903                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1904                                              -class=>"list"}, $from_text);
1905                 }
1906                 if ($to->{'href'}) {
1907                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1908                                              -class=>"list"}, $to_text);
1909                 }
1910                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1911                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1912                 return "<div class=\"diff$diff_class\">$line</div>\n";
1913         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1914                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1915                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1916
1917                 @from_text = split(' ', $ranges);
1918                 for (my $i = 0; $i < @from_text; ++$i) {
1919                         ($from_start[$i], $from_nlines[$i]) =
1920                                 (split(',', substr($from_text[$i], 1)), 0);
1921                 }
1922
1923                 $to_text   = pop @from_text;
1924                 $to_start  = pop @from_start;
1925                 $to_nlines = pop @from_nlines;
1926
1927                 $line = "<span class=\"chunk_info\">$prefix ";
1928                 for (my $i = 0; $i < @from_text; ++$i) {
1929                         if ($from->{'href'}[$i]) {
1930                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1931                                                   -class=>"list"}, $from_text[$i]);
1932                         } else {
1933                                 $line .= $from_text[$i];
1934                         }
1935                         $line .= " ";
1936                 }
1937                 if ($to->{'href'}) {
1938                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1939                                           -class=>"list"}, $to_text);
1940                 } else {
1941                         $line .= $to_text;
1942                 }
1943                 $line .= " $prefix</span>" .
1944                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1945                 return "<div class=\"diff$diff_class\">$line</div>\n";
1946         }
1947         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1948 }
1949
1950 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1951 # linked.  Pass the hash of the tree/commit to snapshot.
1952 sub format_snapshot_links {
1953         my ($hash) = @_;
1954         my $num_fmts = @snapshot_fmts;
1955         if ($num_fmts > 1) {
1956                 # A parenthesized list of links bearing format names.
1957                 # e.g. "snapshot (_tar.gz_ _zip_)"
1958                 return "snapshot (" . join(' ', map
1959                         $cgi->a({
1960                                 -href => href(
1961                                         action=>"snapshot",
1962                                         hash=>$hash,
1963                                         snapshot_format=>$_
1964                                 )
1965                         }, $known_snapshot_formats{$_}{'display'})
1966                 , @snapshot_fmts) . ")";
1967         } elsif ($num_fmts == 1) {
1968                 # A single "snapshot" link whose tooltip bears the format name.
1969                 # i.e. "_snapshot_"
1970                 my ($fmt) = @snapshot_fmts;
1971                 return
1972                         $cgi->a({
1973                                 -href => href(
1974                                         action=>"snapshot",
1975                                         hash=>$hash,
1976                                         snapshot_format=>$fmt
1977                                 ),
1978                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1979                         }, "snapshot");
1980         } else { # $num_fmts == 0
1981                 return undef;
1982         }
1983 }
1984
1985 ## ......................................................................
1986 ## functions returning values to be passed, perhaps after some
1987 ## transformation, to other functions; e.g. returning arguments to href()
1988
1989 # returns hash to be passed to href to generate gitweb URL
1990 # in -title key it returns description of link
1991 sub get_feed_info {
1992         my $format = shift || 'Atom';
1993         my %res = (action => lc($format));
1994
1995         # feed links are possible only for project views
1996         return unless (defined $project);
1997         # some views should link to OPML, or to generic project feed,
1998         # or don't have specific feed yet (so they should use generic)
1999         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2000
2001         my $branch;
2002         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2003         # from tag links; this also makes possible to detect branch links
2004         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2005             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2006                 $branch = $1;
2007         }
2008         # find log type for feed description (title)
2009         my $type = 'log';
2010         if (defined $file_name) {
2011                 $type  = "history of $file_name";
2012                 $type .= "/" if ($action eq 'tree');
2013                 $type .= " on '$branch'" if (defined $branch);
2014         } else {
2015                 $type = "log of $branch" if (defined $branch);
2016         }
2017
2018         $res{-title} = $type;
2019         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2020         $res{'file_name'} = $file_name;
2021
2022         return %res;
2023 }
2024
2025 ## ----------------------------------------------------------------------
2026 ## git utility subroutines, invoking git commands
2027
2028 # returns path to the core git executable and the --git-dir parameter as list
2029 sub git_cmd {
2030         $number_of_git_cmds++;
2031         return $GIT, '--git-dir='.$git_dir;
2032 }
2033
2034 # quote the given arguments for passing them to the shell
2035 # quote_command("command", "arg 1", "arg with ' and ! characters")
2036 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2037 # Try to avoid using this function wherever possible.
2038 sub quote_command {
2039         return join(' ',
2040                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2041 }
2042
2043 # get HEAD ref of given project as hash
2044 sub git_get_head_hash {
2045         return git_get_full_hash(shift, 'HEAD');
2046 }
2047
2048 sub git_get_full_hash {
2049         return git_get_hash(@_);
2050 }
2051
2052 sub git_get_short_hash {
2053         return git_get_hash(@_, '--short=7');
2054 }
2055
2056 sub git_get_hash {
2057         my ($project, $hash, @options) = @_;
2058         my $o_git_dir = $git_dir;
2059         my $retval = undef;
2060         $git_dir = "$projectroot/$project";
2061         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2062             '--verify', '-q', @options, $hash) {
2063                 $retval = <$fd>;
2064                 chomp $retval if defined $retval;
2065                 close $fd;
2066         }
2067         if (defined $o_git_dir) {
2068                 $git_dir = $o_git_dir;
2069         }
2070         return $retval;
2071 }
2072
2073 # get type of given object
2074 sub git_get_type {
2075         my $hash = shift;
2076
2077         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2078         my $type = <$fd>;
2079         close $fd or return;
2080         chomp $type;
2081         return $type;
2082 }
2083
2084 # repository configuration
2085 our $config_file = '';
2086 our %config;
2087
2088 # store multiple values for single key as anonymous array reference
2089 # single values stored directly in the hash, not as [ <value> ]
2090 sub hash_set_multi {
2091         my ($hash, $key, $value) = @_;
2092
2093         if (!exists $hash->{$key}) {
2094                 $hash->{$key} = $value;
2095         } elsif (!ref $hash->{$key}) {
2096                 $hash->{$key} = [ $hash->{$key}, $value ];
2097         } else {
2098                 push @{$hash->{$key}}, $value;
2099         }
2100 }
2101
2102 # return hash of git project configuration
2103 # optionally limited to some section, e.g. 'gitweb'
2104 sub git_parse_project_config {
2105         my $section_regexp = shift;
2106         my %config;
2107
2108         local $/ = "\0";
2109
2110         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2111                 or return;
2112
2113         while (my $keyval = <$fh>) {
2114                 chomp $keyval;
2115                 my ($key, $value) = split(/\n/, $keyval, 2);
2116
2117                 hash_set_multi(\%config, $key, $value)
2118                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2119         }
2120         close $fh;
2121
2122         return %config;
2123 }
2124
2125 # convert config value to boolean: 'true' or 'false'
2126 # no value, number > 0, 'true' and 'yes' values are true
2127 # rest of values are treated as false (never as error)
2128 sub config_to_bool {
2129         my $val = shift;
2130
2131         return 1 if !defined $val;             # section.key
2132
2133         # strip leading and trailing whitespace
2134         $val =~ s/^\s+//;
2135         $val =~ s/\s+$//;
2136
2137         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2138                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2139 }
2140
2141 # convert config value to simple decimal number
2142 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2143 # to be multiplied by 1024, 1048576, or 1073741824
2144 sub config_to_int {
2145         my $val = shift;
2146
2147         # strip leading and trailing whitespace
2148         $val =~ s/^\s+//;
2149         $val =~ s/\s+$//;
2150
2151         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2152                 $unit = lc($unit);
2153                 # unknown unit is treated as 1
2154                 return $num * ($unit eq 'g' ? 1073741824 :
2155                                $unit eq 'm' ?    1048576 :
2156                                $unit eq 'k' ?       1024 : 1);
2157         }
2158         return $val;
2159 }
2160
2161 # convert config value to array reference, if needed
2162 sub config_to_multi {
2163         my $val = shift;
2164
2165         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2166 }
2167
2168 sub git_get_project_config {
2169         my ($key, $type) = @_;
2170
2171         # key sanity check
2172         return unless ($key);
2173         $key =~ s/^gitweb\.//;
2174         return if ($key =~ m/\W/);
2175
2176         # type sanity check
2177         if (defined $type) {
2178                 $type =~ s/^--//;
2179                 $type = undef
2180                         unless ($type eq 'bool' || $type eq 'int');
2181         }
2182
2183         # get config
2184         if (!defined $config_file ||
2185             $config_file ne "$git_dir/config") {
2186                 %config = git_parse_project_config('gitweb');
2187                 $config_file = "$git_dir/config";
2188         }
2189
2190         # check if config variable (key) exists
2191         return unless exists $config{"gitweb.$key"};
2192
2193         # ensure given type
2194         if (!defined $type) {
2195                 return $config{"gitweb.$key"};
2196         } elsif ($type eq 'bool') {
2197                 # backward compatibility: 'git config --bool' returns true/false
2198                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2199         } elsif ($type eq 'int') {
2200                 return config_to_int($config{"gitweb.$key"});
2201         }
2202         return $config{"gitweb.$key"};
2203 }
2204
2205 # get hash of given path at given ref
2206 sub git_get_hash_by_path {
2207         my $base = shift;
2208         my $path = shift || return undef;
2209         my $type = shift;
2210
2211         $path =~ s,/+$,,;
2212
2213         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2214                 or die_error(500, "Open git-ls-tree failed");
2215         my $line = <$fd>;
2216         close $fd or return undef;
2217
2218         if (!defined $line) {
2219                 # there is no tree or hash given by $path at $base
2220                 return undef;
2221         }
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2225         if (defined $type && $type ne $2) {
2226                 # type doesn't match
2227                 return undef;
2228         }
2229         return $3;
2230 }
2231
2232 # get path of entry with given hash at given tree-ish (ref)
2233 # used to get 'from' filename for combined diff (merge commit) for renames
2234 sub git_get_path_by_hash {
2235         my $base = shift || return;
2236         my $hash = shift || return;
2237
2238         local $/ = "\0";
2239
2240         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2241                 or return undef;
2242         while (my $line = <$fd>) {
2243                 chomp $line;
2244
2245                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2246                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2247                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2248                         close $fd;
2249                         return $1;
2250                 }
2251         }
2252         close $fd;
2253         return undef;
2254 }
2255
2256 ## ......................................................................
2257 ## git utility functions, directly accessing git repository
2258
2259 sub git_get_project_description {
2260         my $path = shift;
2261
2262         $git_dir = "$projectroot/$path";
2263         open my $fd, '<', "$git_dir/description"
2264                 or return git_get_project_config('description');
2265         my $descr = <$fd>;
2266         close $fd;
2267         if (defined $descr) {
2268                 chomp $descr;
2269         }
2270         return $descr;
2271 }
2272
2273 sub git_get_project_ctags {
2274         my $path = shift;
2275         my $ctags = {};
2276
2277         $git_dir = "$projectroot/$path";
2278         opendir my $dh, "$git_dir/ctags"
2279                 or return $ctags;
2280         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2281                 open my $ct, '<', $_ or next;
2282                 my $val = <$ct>;
2283                 chomp $val;
2284                 close $ct;
2285                 my $ctag = $_; $ctag =~ s#.*/##;
2286                 $ctags->{$ctag} = $val;
2287         }
2288         closedir $dh;
2289         $ctags;
2290 }
2291
2292 sub git_populate_project_tagcloud {
2293         my $ctags = shift;
2294
2295         # First, merge different-cased tags; tags vote on casing
2296         my %ctags_lc;
2297         foreach (keys %$ctags) {
2298                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2299                 if (not $ctags_lc{lc $_}->{topcount}
2300                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2301                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2302                         $ctags_lc{lc $_}->{topname} = $_;
2303                 }
2304         }
2305
2306         my $cloud;
2307         if (eval { require HTML::TagCloud; 1; }) {
2308                 $cloud = HTML::TagCloud->new;
2309                 foreach (sort keys %ctags_lc) {
2310                         # Pad the title with spaces so that the cloud looks
2311                         # less crammed.
2312                         my $title = $ctags_lc{$_}->{topname};
2313                         $title =~ s/ /&nbsp;/g;
2314                         $title =~ s/^/&nbsp;/g;
2315                         $title =~ s/$/&nbsp;/g;
2316                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2317                 }
2318         } else {
2319                 $cloud = \%ctags_lc;
2320         }
2321         $cloud;
2322 }
2323
2324 sub git_show_project_tagcloud {
2325         my ($cloud, $count) = @_;
2326         print STDERR ref($cloud)."..\n";
2327         if (ref $cloud eq 'HTML::TagCloud') {
2328                 return $cloud->html_and_css($count);
2329         } else {
2330                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2331                 return '<p align="center">' . join (', ', map {
2332                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2333                 } splice(@tags, 0, $count)) . '</p>';
2334         }
2335 }
2336
2337 sub git_get_project_url_list {
2338         my $path = shift;
2339
2340         $git_dir = "$projectroot/$path";
2341         open my $fd, '<', "$git_dir/cloneurl"
2342                 or return wantarray ?
2343                 @{ config_to_multi(git_get_project_config('url')) } :
2344                    config_to_multi(git_get_project_config('url'));
2345         my @git_project_url_list = map { chomp; $_ } <$fd>;
2346         close $fd;
2347
2348         return wantarray ? @git_project_url_list : \@git_project_url_list;
2349 }
2350
2351 sub git_get_projects_list {
2352         my ($filter) = @_;
2353         my @list;
2354
2355         $filter ||= '';
2356         $filter =~ s/\.git$//;
2357
2358         my $check_forks = gitweb_check_feature('forks');
2359
2360         if (-d $projects_list) {
2361                 # search in directory
2362                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2363                 # remove the trailing "/"
2364                 $dir =~ s!/+$!!;
2365                 my $pfxlen = length("$dir");
2366                 my $pfxdepth = ($dir =~ tr!/!!);
2367
2368                 File::Find::find({
2369                         follow_fast => 1, # follow symbolic links
2370                         follow_skip => 2, # ignore duplicates
2371                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2372                         wanted => sub {
2373                                 # skip project-list toplevel, if we get it.
2374                                 return if (m!^[/.]$!);
2375                                 # only directories can be git repositories
2376                                 return unless (-d $_);
2377                                 # don't traverse too deep (Find is super slow on os x)
2378                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2379                                         $File::Find::prune = 1;
2380                                         return;
2381                                 }
2382
2383                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2384                                 # we check related file in $projectroot
2385                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2386                                 if (check_export_ok("$projectroot/$path")) {
2387                                         push @list, { path => $path };
2388                                         $File::Find::prune = 1;
2389                                 }
2390                         },
2391                 }, "$dir");
2392
2393         } elsif (-f $projects_list) {
2394                 # read from file(url-encoded):
2395                 # 'git%2Fgit.git Linus+Torvalds'
2396                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2397                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2398                 my %paths;
2399                 open my $fd, '<', $projects_list or return;
2400         PROJECT:
2401                 while (my $line = <$fd>) {
2402                         chomp $line;
2403                         my ($path, $owner) = split ' ', $line;
2404                         $path = unescape($path);
2405                         $owner = unescape($owner);
2406                         if (!defined $path) {
2407                                 next;
2408                         }
2409                         if ($filter ne '') {
2410                                 # looking for forks;
2411                                 my $pfx = substr($path, 0, length($filter));
2412                                 if ($pfx ne $filter) {
2413                                         next PROJECT;
2414                                 }
2415                                 my $sfx = substr($path, length($filter));
2416                                 if ($sfx !~ /^\/.*\.git$/) {
2417                                         next PROJECT;
2418                                 }
2419                         } elsif ($check_forks) {
2420                         PATH:
2421                                 foreach my $filter (keys %paths) {
2422                                         # looking for forks;
2423                                         my $pfx = substr($path, 0, length($filter));
2424                                         if ($pfx ne $filter) {
2425                                                 next PATH;
2426                                         }
2427                                         my $sfx = substr($path, length($filter));
2428                                         if ($sfx !~ /^\/.*\.git$/) {
2429                                                 next PATH;
2430                                         }
2431                                         # is a fork, don't include it in
2432                                         # the list
2433                                         next PROJECT;
2434                                 }
2435                         }
2436                         if (check_export_ok("$projectroot/$path")) {
2437                                 my $pr = {
2438                                         path => $path,
2439                                         owner => to_utf8($owner),
2440                                 };
2441                                 push @list, $pr;
2442                                 (my $forks_path = $path) =~ s/\.git$//;
2443                                 $paths{$forks_path}++;
2444                         }
2445                 }
2446                 close $fd;
2447         }
2448         return @list;
2449 }
2450
2451 our $gitweb_project_owner = undef;
2452 sub git_get_project_list_from_file {
2453
2454         return if (defined $gitweb_project_owner);
2455
2456         $gitweb_project_owner = {};
2457         # read from file (url-encoded):
2458         # 'git%2Fgit.git Linus+Torvalds'
2459         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2460         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2461         if (-f $projects_list) {
2462                 open(my $fd, '<', $projects_list);
2463                 while (my $line = <$fd>) {
2464                         chomp $line;
2465                         my ($pr, $ow) = split ' ', $line;
2466                         $pr = unescape($pr);
2467                         $ow = unescape($ow);
2468                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2469                 }
2470                 close $fd;
2471         }
2472 }
2473
2474 sub git_get_project_owner {
2475         my $project = shift;
2476         my $owner;
2477
2478         return undef unless $project;
2479         $git_dir = "$projectroot/$project";
2480
2481         if (!defined $gitweb_project_owner) {
2482                 git_get_project_list_from_file();
2483         }
2484
2485         if (exists $gitweb_project_owner->{$project}) {
2486                 $owner = $gitweb_project_owner->{$project};
2487         }
2488         if (!defined $owner){
2489                 $owner = git_get_project_config('owner');
2490         }
2491         if (!defined $owner) {
2492                 $owner = get_file_owner("$git_dir");
2493         }
2494
2495         return $owner;
2496 }
2497
2498 sub git_get_last_activity {
2499         my ($path) = @_;
2500         my $fd;
2501
2502         $git_dir = "$projectroot/$path";
2503         open($fd, "-|", git_cmd(), 'for-each-ref',
2504              '--format=%(committer)',
2505              '--sort=-committerdate',
2506              '--count=1',
2507              'refs/heads') or return;
2508         my $most_recent = <$fd>;
2509         close $fd or return;
2510         if (defined $most_recent &&
2511             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2512                 my $timestamp = $1;
2513                 my $age = time - $timestamp;
2514                 return ($age, age_string($age));
2515         }
2516         return (undef, undef);
2517 }
2518
2519 sub git_get_references {
2520         my $type = shift || "";
2521         my %refs;
2522         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2523         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2524         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2525                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2526                 or return;
2527
2528         while (my $line = <$fd>) {
2529                 chomp $line;
2530                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2531                         if (defined $refs{$1}) {
2532                                 push @{$refs{$1}}, $2;
2533                         } else {
2534                                 $refs{$1} = [ $2 ];
2535                         }
2536                 }
2537         }
2538         close $fd or return;
2539         return \%refs;
2540 }
2541
2542 sub git_get_rev_name_tags {
2543         my $hash = shift || return undef;
2544
2545         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2546                 or return;
2547         my $name_rev = <$fd>;
2548         close $fd;
2549
2550         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2551                 return $1;
2552         } else {
2553                 # catches also '$hash undefined' output
2554                 return undef;
2555         }
2556 }
2557
2558 ## ----------------------------------------------------------------------
2559 ## parse to hash functions
2560
2561 sub parse_date {
2562         my $epoch = shift;
2563         my $tz = shift || "-0000";
2564
2565         my %date;
2566         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2567         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2568         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2569         $date{'hour'} = $hour;
2570         $date{'minute'} = $min;
2571         $date{'mday'} = $mday;
2572         $date{'day'} = $days[$wday];
2573         $date{'month'} = $months[$mon];
2574         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2575                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2576         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2577                              $mday, $months[$mon], $hour ,$min;
2578         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2579                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2580
2581         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2582         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2583         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2584         $date{'hour_local'} = $hour;
2585         $date{'minute_local'} = $min;
2586         $date{'tz_local'} = $tz;
2587         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2588                                   1900+$year, $mon+1, $mday,
2589                                   $hour, $min, $sec, $tz);
2590         return %date;
2591 }
2592
2593 sub parse_tag {
2594         my $tag_id = shift;
2595         my %tag;
2596         my @comment;
2597
2598         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2599         $tag{'id'} = $tag_id;
2600         while (my $line = <$fd>) {
2601                 chomp $line;
2602                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2603                         $tag{'object'} = $1;
2604                 } elsif ($line =~ m/^type (.+)$/) {
2605                         $tag{'type'} = $1;
2606                 } elsif ($line =~ m/^tag (.+)$/) {
2607                         $tag{'name'} = $1;
2608                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2609                         $tag{'author'} = $1;
2610                         $tag{'author_epoch'} = $2;
2611                         $tag{'author_tz'} = $3;
2612                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2613                                 $tag{'author_name'}  = $1;
2614                                 $tag{'author_email'} = $2;
2615                         } else {
2616                                 $tag{'author_name'} = $tag{'author'};
2617                         }
2618                 } elsif ($line =~ m/--BEGIN/) {
2619                         push @comment, $line;
2620                         last;
2621                 } elsif ($line eq "") {
2622                         last;
2623                 }
2624         }
2625         push @comment, <$fd>;
2626         $tag{'comment'} = \@comment;
2627         close $fd or return;
2628         if (!defined $tag{'name'}) {
2629                 return
2630         };
2631         return %tag
2632 }
2633
2634 sub parse_commit_text {
2635         my ($commit_text, $withparents) = @_;
2636         my @commit_lines = split '\n', $commit_text;
2637         my %co;
2638
2639         pop @commit_lines; # Remove '\0'
2640
2641         if (! @commit_lines) {
2642                 return;
2643         }
2644
2645         my $header = shift @commit_lines;
2646         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2647                 return;
2648         }
2649         ($co{'id'}, my @parents) = split ' ', $header;
2650         while (my $line = shift @commit_lines) {
2651                 last if $line eq "\n";
2652                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2653                         $co{'tree'} = $1;
2654                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2655                         push @parents, $1;
2656                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2657                         $co{'author'} = to_utf8($1);
2658                         $co{'author_epoch'} = $2;
2659                         $co{'author_tz'} = $3;
2660                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2661                                 $co{'author_name'}  = $1;
2662                                 $co{'author_email'} = $2;
2663                         } else {
2664                                 $co{'author_name'} = $co{'author'};
2665                         }
2666                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2667                         $co{'committer'} = to_utf8($1);
2668                         $co{'committer_epoch'} = $2;
2669                         $co{'committer_tz'} = $3;
2670                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2671                                 $co{'committer_name'}  = $1;
2672                                 $co{'committer_email'} = $2;
2673                         } else {
2674                                 $co{'committer_name'} = $co{'committer'};
2675                         }
2676                 }
2677         }
2678         if (!defined $co{'tree'}) {
2679                 return;
2680         };
2681         $co{'parents'} = \@parents;
2682         $co{'parent'} = $parents[0];
2683
2684         foreach my $title (@commit_lines) {
2685                 $title =~ s/^    //;
2686                 if ($title ne "") {
2687                         $co{'title'} = chop_str($title, 80, 5);
2688                         # remove leading stuff of merges to make the interesting part visible
2689                         if (length($title) > 50) {
2690                                 $title =~ s/^Automatic //;
2691                                 $title =~ s/^merge (of|with) /Merge ... /i;
2692                                 if (length($title) > 50) {
2693                                         $title =~ s/(http|rsync):\/\///;
2694                                 }
2695                                 if (length($title) > 50) {
2696                                         $title =~ s/(master|www|rsync)\.//;
2697                                 }
2698                                 if (length($title) > 50) {
2699                                         $title =~ s/kernel.org:?//;
2700                                 }
2701                                 if (length($title) > 50) {
2702                                         $title =~ s/\/pub\/scm//;
2703                                 }
2704                         }
2705                         $co{'title_short'} = chop_str($title, 50, 5);
2706                         last;
2707                 }
2708         }
2709         if (! defined $co{'title'} || $co{'title'} eq "") {
2710                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2711         }
2712         # remove added spaces
2713         foreach my $line (@commit_lines) {
2714                 $line =~ s/^    //;
2715         }
2716         $co{'comment'} = \@commit_lines;
2717
2718         my $age = time - $co{'committer_epoch'};
2719         $co{'age'} = $age;
2720         $co{'age_string'} = age_string($age);
2721         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2722         if ($age > 60*60*24*7*2) {
2723                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2724                 $co{'age_string_age'} = $co{'age_string'};
2725         } else {
2726                 $co{'age_string_date'} = $co{'age_string'};
2727                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2728         }
2729         return %co;
2730 }
2731
2732 sub parse_commit {
2733         my ($commit_id) = @_;
2734         my %co;
2735
2736         local $/ = "\0";
2737
2738         open my $fd, "-|", git_cmd(), "rev-list",
2739                 "--parents",
2740                 "--header",
2741                 "--max-count=1",
2742                 $commit_id,
2743                 "--",
2744                 or die_error(500, "Open git-rev-list failed");
2745         %co = parse_commit_text(<$fd>, 1);
2746         close $fd;
2747
2748         return %co;
2749 }
2750
2751 sub parse_commits {
2752         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2753         my @cos;
2754
2755         $maxcount ||= 1;
2756         $skip ||= 0;
2757
2758         local $/ = "\0";
2759
2760         open my $fd, "-|", git_cmd(), "rev-list",
2761                 "--header",
2762                 @args,
2763                 ("--max-count=" . $maxcount),
2764                 ("--skip=" . $skip),
2765                 @extra_options,
2766                 $commit_id,
2767                 "--",
2768                 ($filename ? ($filename) : ())
2769                 or die_error(500, "Open git-rev-list failed");
2770         while (my $line = <$fd>) {
2771                 my %co = parse_commit_text($line);
2772                 push @cos, \%co;
2773         }
2774         close $fd;
2775
2776         return wantarray ? @cos : \@cos;
2777 }
2778
2779 # parse line of git-diff-tree "raw" output
2780 sub parse_difftree_raw_line {
2781         my $line = shift;
2782         my %res;
2783
2784         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2785         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2786         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2787                 $res{'from_mode'} = $1;
2788                 $res{'to_mode'} = $2;
2789                 $res{'from_id'} = $3;
2790                 $res{'to_id'} = $4;
2791                 $res{'status'} = $5;
2792                 $res{'similarity'} = $6;
2793                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2794                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2795                 } else {
2796                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2797                 }
2798         }
2799         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2800         # combined diff (for merge commit)
2801         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2802                 $res{'nparents'}  = length($1);
2803                 $res{'from_mode'} = [ split(' ', $2) ];
2804                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2805                 $res{'from_id'} = [ split(' ', $3) ];
2806                 $res{'to_id'} = pop @{$res{'from_id'}};
2807                 $res{'status'} = [ split('', $4) ];
2808                 $res{'to_file'} = unquote($5);
2809         }
2810         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2811         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2812                 $res{'commit'} = $1;
2813         }
2814
2815         return wantarray ? %res : \%res;
2816 }
2817
2818 # wrapper: return parsed line of git-diff-tree "raw" output
2819 # (the argument might be raw line, or parsed info)
2820 sub parsed_difftree_line {
2821         my $line_or_ref = shift;
2822
2823         if (ref($line_or_ref) eq "HASH") {
2824                 # pre-parsed (or generated by hand)
2825                 return $line_or_ref;
2826         } else {
2827                 return parse_difftree_raw_line($line_or_ref);
2828         }
2829 }
2830
2831 # parse line of git-ls-tree output
2832 sub parse_ls_tree_line {
2833         my $line = shift;
2834         my %opts = @_;
2835         my %res;
2836
2837         if ($opts{'-l'}) {
2838                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2839                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2840
2841                 $res{'mode'} = $1;
2842                 $res{'type'} = $2;
2843                 $res{'hash'} = $3;
2844                 $res{'size'} = $4;
2845                 if ($opts{'-z'}) {
2846                         $res{'name'} = $5;
2847                 } else {
2848                         $res{'name'} = unquote($5);
2849                 }
2850         } else {
2851                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2852                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2853
2854                 $res{'mode'} = $1;
2855                 $res{'type'} = $2;
2856                 $res{'hash'} = $3;
2857                 if ($opts{'-z'}) {
2858                         $res{'name'} = $4;
2859                 } else {
2860                         $res{'name'} = unquote($4);
2861                 }
2862         }
2863
2864         return wantarray ? %res : \%res;
2865 }
2866
2867 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2868 sub parse_from_to_diffinfo {
2869         my ($diffinfo, $from, $to, @parents) = @_;
2870
2871         if ($diffinfo->{'nparents'}) {
2872                 # combined diff
2873                 $from->{'file'} = [];
2874                 $from->{'href'} = [];
2875                 fill_from_file_info($diffinfo, @parents)
2876                         unless exists $diffinfo->{'from_file'};
2877                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2878                         $from->{'file'}[$i] =
2879                                 defined $diffinfo->{'from_file'}[$i] ?
2880                                         $diffinfo->{'from_file'}[$i] :
2881                                         $diffinfo->{'to_file'};
2882                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2883                                 $from->{'href'}[$i] = href(action=>"blob",
2884                                                            hash_base=>$parents[$i],
2885                                                            hash=>$diffinfo->{'from_id'}[$i],
2886                                                            file_name=>$from->{'file'}[$i]);
2887                         } else {
2888                                 $from->{'href'}[$i] = undef;
2889                         }
2890                 }
2891         } else {
2892                 # ordinary (not combined) diff
2893                 $from->{'file'} = $diffinfo->{'from_file'};
2894                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2895                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2896                                                hash=>$diffinfo->{'from_id'},
2897                                                file_name=>$from->{'file'});
2898                 } else {
2899                         delete $from->{'href'};
2900                 }
2901         }
2902
2903         $to->{'file'} = $diffinfo->{'to_file'};
2904         if (!is_deleted($diffinfo)) { # file exists in result
2905                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2906                                      hash=>$diffinfo->{'to_id'},
2907                                      file_name=>$to->{'file'});
2908         } else {
2909                 delete $to->{'href'};
2910         }
2911 }
2912
2913 ## ......................................................................
2914 ## parse to array of hashes functions
2915
2916 sub git_get_heads_list {
2917         my $limit = shift;
2918         my @headslist;
2919
2920         open my $fd, '-|', git_cmd(), 'for-each-ref',
2921                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2922                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2923                 'refs/heads'
2924                 or return;
2925         while (my $line = <$fd>) {
2926                 my %ref_item;
2927
2928                 chomp $line;
2929                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2930                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2931                 my ($committer, $epoch, $tz) =
2932                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2933                 $ref_item{'fullname'}  = $name;
2934                 $name =~ s!^refs/heads/!!;
2935
2936                 $ref_item{'name'}  = $name;
2937                 $ref_item{'id'}    = $hash;
2938                 $ref_item{'title'} = $title || '(no commit message)';
2939                 $ref_item{'epoch'} = $epoch;
2940                 if ($epoch) {
2941                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2942                 } else {
2943                         $ref_item{'age'} = "unknown";
2944                 }
2945
2946                 push @headslist, \%ref_item;
2947         }
2948         close $fd;
2949
2950         return wantarray ? @headslist : \@headslist;
2951 }
2952
2953 sub git_get_tags_list {
2954         my $limit = shift;
2955         my @tagslist;
2956
2957         open my $fd, '-|', git_cmd(), 'for-each-ref',
2958                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2959                 '--format=%(objectname) %(objecttype) %(refname) '.
2960                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2961                 'refs/tags'
2962                 or return;
2963         while (my $line = <$fd>) {
2964                 my %ref_item;
2965
2966                 chomp $line;
2967                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2968                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2969                 my ($creator, $epoch, $tz) =
2970                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2971                 $ref_item{'fullname'} = $name;
2972                 $name =~ s!^refs/tags/!!;
2973
2974                 $ref_item{'type'} = $type;
2975                 $ref_item{'id'} = $id;
2976                 $ref_item{'name'} = $name;
2977                 if ($type eq "tag") {
2978                         $ref_item{'subject'} = $title;
2979                         $ref_item{'reftype'} = $reftype;
2980                         $ref_item{'refid'}   = $refid;
2981                 } else {
2982                         $ref_item{'reftype'} = $type;
2983                         $ref_item{'refid'}   = $id;
2984                 }
2985
2986                 if ($type eq "tag" || $type eq "commit") {
2987                         $ref_item{'epoch'} = $epoch;
2988                         if ($epoch) {
2989                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2990                         } else {
2991                                 $ref_item{'age'} = "unknown";
2992                         }
2993                 }
2994
2995                 push @tagslist, \%ref_item;
2996         }
2997         close $fd;
2998
2999         return wantarray ? @tagslist : \@tagslist;
3000 }
3001
3002 ## ----------------------------------------------------------------------
3003 ## filesystem-related functions
3004
3005 sub get_file_owner {
3006         my $path = shift;
3007
3008         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3009         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3010         if (!defined $gcos) {
3011                 return undef;
3012         }
3013         my $owner = $gcos;
3014         $owner =~ s/[,;].*$//;
3015         return to_utf8($owner);
3016 }
3017
3018 # assume that file exists
3019 sub insert_file {
3020         my $filename = shift;
3021
3022         open my $fd, '<', $filename;
3023         print map { to_utf8($_) } <$fd>;
3024         close $fd;
3025 }
3026
3027 ## ......................................................................
3028 ## mimetype related functions
3029
3030 sub mimetype_guess_file {
3031         my $filename = shift;
3032         my $mimemap = shift;
3033         -r $mimemap or return undef;
3034
3035         my %mimemap;
3036         open(my $mh, '<', $mimemap) or return undef;
3037         while (<$mh>) {
3038                 next if m/^#/; # skip comments
3039                 my ($mimetype, $exts) = split(/\t+/);
3040                 if (defined $exts) {
3041                         my @exts = split(/\s+/, $exts);
3042                         foreach my $ext (@exts) {
3043                                 $mimemap{$ext} = $mimetype;
3044                         }
3045                 }
3046         }
3047         close($mh);
3048
3049         $filename =~ /\.([^.]*)$/;
3050         return $mimemap{$1};
3051 }
3052
3053 sub mimetype_guess {
3054         my $filename = shift;
3055         my $mime;
3056         $filename =~ /\./ or return undef;
3057
3058         if ($mimetypes_file) {
3059                 my $file = $mimetypes_file;
3060                 if ($file !~ m!^/!) { # if it is relative path
3061                         # it is relative to project
3062                         $file = "$projectroot/$project/$file";
3063                 }
3064                 $mime = mimetype_guess_file($filename, $file);
3065         }
3066         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3067         return $mime;
3068 }
3069
3070 sub blob_mimetype {
3071         my $fd = shift;
3072         my $filename = shift;
3073
3074         if ($filename) {
3075                 my $mime = mimetype_guess($filename);
3076                 $mime and return $mime;
3077         }
3078
3079         # just in case
3080         return $default_blob_plain_mimetype unless $fd;
3081
3082         if (-T $fd) {
3083                 return 'text/plain';
3084         } elsif (! $filename) {
3085                 return 'application/octet-stream';
3086         } elsif ($filename =~ m/\.png$/i) {
3087                 return 'image/png';
3088         } elsif ($filename =~ m/\.gif$/i) {
3089                 return 'image/gif';
3090         } elsif ($filename =~ m/\.jpe?g$/i) {
3091                 return 'image/jpeg';
3092         } else {
3093                 return 'application/octet-stream';
3094         }
3095 }
3096
3097 sub blob_contenttype {
3098         my ($fd, $file_name, $type) = @_;
3099
3100         $type ||= blob_mimetype($fd, $file_name);
3101         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3102                 $type .= "; charset=$default_text_plain_charset";
3103         }
3104
3105         return $type;
3106 }
3107
3108 ## ======================================================================
3109 ## functions printing HTML: header, footer, error page
3110
3111 sub git_header_html {
3112         my $status = shift || "200 OK";
3113         my $expires = shift;
3114
3115         my $title = "$site_name";
3116         if (defined $project) {
3117                 $title .= " - " . to_utf8($project);
3118                 if (defined $action) {
3119                         $title .= "/$action";
3120                         if (defined $file_name) {
3121                                 $title .= " - " . esc_path($file_name);
3122                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3123                                         $title .= "/";
3124                                 }
3125                         }
3126                 }
3127         }
3128         my $content_type;
3129         # require explicit support from the UA if we are to send the page as
3130         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3131         # we have to do this because MSIE sometimes globs '*/*', pretending to
3132         # support xhtml+xml but choking when it gets what it asked for.
3133         if (defined $cgi->http('HTTP_ACCEPT') &&
3134             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3135             $cgi->Accept('application/xhtml+xml') != 0) {
3136                 $content_type = 'application/xhtml+xml';
3137         } else {
3138                 $content_type = 'text/html';
3139         }
3140         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3141                            -status=> $status, -expires => $expires);
3142         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3143         print <<EOF;
3144 <?xml version="1.0" encoding="utf-8"?>
3145 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3146 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3147 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3148 <!-- git core binaries version $git_version -->
3149 <head>
3150 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3151 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3152 <meta name="robots" content="index, nofollow"/>
3153 <title>$title</title>
3154 EOF
3155         # the stylesheet, favicon etc urls won't work correctly with path_info
3156         # unless we set the appropriate base URL
3157         if ($ENV{'PATH_INFO'}) {
3158                 print "<base href=\"".esc_url($base_url)."\" />\n";
3159         }
3160         # print out each stylesheet that exist, providing backwards capability
3161         # for those people who defined $stylesheet in a config file
3162         if (defined $stylesheet) {
3163                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3164         } else {
3165                 foreach my $stylesheet (@stylesheets) {
3166                         next unless $stylesheet;
3167                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3168                 }
3169         }
3170         if (defined $project) {
3171                 my %href_params = get_feed_info();
3172                 if (!exists $href_params{'-title'}) {
3173                         $href_params{'-title'} = 'log';
3174                 }
3175
3176                 foreach my $format qw(RSS Atom) {
3177                         my $type = lc($format);
3178                         my %link_attr = (
3179                                 '-rel' => 'alternate',
3180                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3181                                 '-type' => "application/$type+xml"
3182                         );
3183
3184                         $href_params{'action'} = $type;
3185                         $link_attr{'-href'} = href(%href_params);
3186                         print "<link ".
3187                               "rel=\"$link_attr{'-rel'}\" ".
3188                               "title=\"$link_attr{'-title'}\" ".
3189                               "href=\"$link_attr{'-href'}\" ".
3190                               "type=\"$link_attr{'-type'}\" ".
3191                               "/>\n";
3192
3193                         $href_params{'extra_options'} = '--no-merges';
3194                         $link_attr{'-href'} = href(%href_params);
3195                         $link_attr{'-title'} .= ' (no merges)';
3196                         print "<link ".
3197                               "rel=\"$link_attr{'-rel'}\" ".
3198                               "title=\"$link_attr{'-title'}\" ".
3199                               "href=\"$link_attr{'-href'}\" ".
3200                               "type=\"$link_attr{'-type'}\" ".
3201                               "/>\n";
3202                 }
3203
3204         } else {
3205                 printf('<link rel="alternate" title="%s projects list" '.
3206                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3207                        $site_name, href(project=>undef, action=>"project_index"));
3208                 printf('<link rel="alternate" title="%s projects feeds" '.
3209                        'href="%s" type="text/x-opml" />'."\n",
3210                        $site_name, href(project=>undef, action=>"opml"));
3211         }
3212         if (defined $favicon) {
3213                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3214         }
3215
3216         print "</head>\n" .
3217               "<body>\n";
3218
3219         if (-f $site_header) {
3220                 insert_file($site_header);
3221         }
3222
3223         print "<div class=\"page_header\">\n" .
3224               $cgi->a({-href => esc_url($logo_url),
3225                        -title => $logo_label},
3226                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3227         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3228         if (defined $project) {
3229                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3230                 if (defined $action) {
3231                         print " / $action";
3232                 }
3233                 print "\n";
3234         }
3235         print "</div>\n";
3236
3237         my $have_search = gitweb_check_feature('search');
3238         if (defined $project && $have_search) {
3239                 if (!defined $searchtext) {
3240                         $searchtext = "";
3241                 }
3242                 my $search_hash;
3243                 if (defined $hash_base) {
3244                         $search_hash = $hash_base;
3245                 } elsif (defined $hash) {
3246                         $search_hash = $hash;
3247                 } else {
3248                         $search_hash = "HEAD";
3249                 }
3250                 my $action = $my_uri;
3251                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3252                 if ($use_pathinfo) {
3253                         $action .= "/".esc_url($project);
3254                 }
3255                 print $cgi->startform(-method => "get", -action => $action) .
3256                       "<div class=\"search\">\n" .
3257                       (!$use_pathinfo &&
3258                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3259                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3260                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3261                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3262                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3263                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3264                       " search:\n",
3265                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3266                       "<span title=\"Extended regular expression\">" .
3267                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3268                                      -checked => $search_use_regexp) .
3269                       "</span>" .
3270                       "</div>" .
3271                       $cgi->end_form() . "\n";
3272         }
3273 }
3274
3275 sub git_footer_html {
3276         my $feed_class = 'rss_logo';
3277
3278         print "<div class=\"page_footer\">\n";
3279         if (defined $project) {
3280                 my $descr = git_get_project_description($project);
3281                 if (defined $descr) {
3282                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3283                 }
3284
3285                 my %href_params = get_feed_info();
3286                 if (!%href_params) {
3287                         $feed_class .= ' generic';
3288                 }
3289                 $href_params{'-title'} ||= 'log';
3290
3291                 foreach my $format qw(RSS Atom) {
3292                         $href_params{'action'} = lc($format);
3293                         print $cgi->a({-href => href(%href_params),
3294                                       -title => "$href_params{'-title'} $format feed",
3295                                       -class => $feed_class}, $format)."\n";
3296                 }
3297
3298         } else {
3299                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3300                               -class => $feed_class}, "OPML") . " ";
3301                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3302                               -class => $feed_class}, "TXT") . "\n";
3303         }
3304         print "</div>\n"; # class="page_footer"
3305
3306         if (defined $t0 && gitweb_check_feature('timed')) {
3307                 print "<div id=\"generating_info\">\n";
3308                 print 'This page took '.
3309                       '<span id="generating_time" class="time_span">'.
3310                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3311                       ' seconds </span>'.
3312                       ' and '.
3313                       '<span id="generating_cmd">'.
3314                       $number_of_git_cmds.
3315                       '</span> git commands '.
3316                       " to generate.\n";
3317                 print "</div>\n"; # class="page_footer"
3318         }
3319
3320         if (-f $site_footer) {
3321                 insert_file($site_footer);
3322         }
3323
3324         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3325         if ($action eq 'blame_incremental') {
3326                 print qq!<script type="text/javascript">\n!.
3327                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3328                       qq!           "!. href() .qq!");\n!.
3329                       qq!</script>\n!;
3330         } else {
3331                 print qq!<script type="text/javascript">\n!.
3332                       qq!window.onload = fixLinks;\n!.
3333                       qq!</script>\n!;
3334         }
3335
3336         print "</body>\n" .
3337               "</html>";
3338 }
3339
3340 # die_error(<http_status_code>, <error_message>)
3341 # Example: die_error(404, 'Hash not found')
3342 # By convention, use the following status codes (as defined in RFC 2616):
3343 # 400: Invalid or missing CGI parameters, or
3344 #      requested object exists but has wrong type.
3345 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3346 #      this server or project.
3347 # 404: Requested object/revision/project doesn't exist.
3348 # 500: The server isn't configured properly, or
3349 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3350 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3351 sub die_error {
3352         my $status = shift || 500;
3353         my $error = shift || "Internal server error";
3354
3355         my %http_responses = (400 => '400 Bad Request',
3356                               403 => '403 Forbidden',
3357                               404 => '404 Not Found',
3358                               500 => '500 Internal Server Error');
3359         git_header_html($http_responses{$status});
3360         print <<EOF;
3361 <div class="page_body">
3362 <br /><br />
3363 $status - $error
3364 <br />
3365 </div>
3366 EOF
3367         git_footer_html();
3368         exit;
3369 }
3370
3371 ## ----------------------------------------------------------------------
3372 ## functions printing or outputting HTML: navigation
3373
3374 sub git_print_page_nav {
3375         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3376         $extra = '' if !defined $extra; # pager or formats
3377
3378         my @navs = qw(summary shortlog log commit commitdiff tree);
3379         if ($suppress) {
3380                 @navs = grep { $_ ne $suppress } @navs;
3381         }
3382
3383         my %arg = map { $_ => {action=>$_} } @navs;
3384         if (defined $head) {
3385                 for (qw(commit commitdiff)) {
3386                         $arg{$_}{'hash'} = $head;
3387                 }
3388                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3389                         for (qw(shortlog log)) {
3390                                 $arg{$_}{'hash'} = $head;
3391                         }
3392                 }
3393         }
3394
3395         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3396         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3397
3398         my @actions = gitweb_get_feature('actions');
3399         my %repl = (
3400                 '%' => '%',
3401                 'n' => $project,         # project name
3402                 'f' => $git_dir,         # project path within filesystem
3403                 'h' => $treehead || '',  # current hash ('h' parameter)
3404                 'b' => $treebase || '',  # hash base ('hb' parameter)
3405         );
3406         while (@actions) {
3407                 my ($label, $link, $pos) = splice(@actions,0,3);
3408                 # insert
3409                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3410                 # munch munch
3411                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3412                 $arg{$label}{'_href'} = $link;
3413         }
3414
3415         print "<div class=\"page_nav\">\n" .
3416                 (join " | ",
3417                  map { $_ eq $current ?
3418                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3419                  } @navs);
3420         print "<br/>\n$extra<br/>\n" .
3421               "</div>\n";
3422 }
3423
3424 sub format_paging_nav {
3425         my ($action, $hash, $head, $page, $has_next_link) = @_;
3426         my $paging_nav;
3427
3428
3429         if ($hash ne $head || $page) {
3430                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3431         } else {
3432                 $paging_nav .= "HEAD";
3433         }
3434
3435         if ($page > 0) {
3436                 $paging_nav .= " &sdot; " .
3437                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3438                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3439         } else {
3440                 $paging_nav .= " &sdot; prev";
3441         }
3442
3443         if ($has_next_link) {
3444                 $paging_nav .= " &sdot; " .
3445                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3446                                  -accesskey => "n", -title => "Alt-n"}, "next");
3447         } else {
3448                 $paging_nav .= " &sdot; next";
3449         }
3450
3451         return $paging_nav;
3452 }
3453
3454 ## ......................................................................
3455 ## functions printing or outputting HTML: div
3456
3457 sub git_print_header_div {
3458         my ($action, $title, $hash, $hash_base) = @_;
3459         my %args = ();
3460
3461         $args{'action'} = $action;
3462         $args{'hash'} = $hash if $hash;
3463         $args{'hash_base'} = $hash_base if $hash_base;
3464
3465         print "<div class=\"header\">\n" .
3466               $cgi->a({-href => href(%args), -class => "title"},
3467               $title ? $title : $action) .
3468               "\n</div>\n";
3469 }
3470
3471 sub print_local_time {
3472         my %date = @_;
3473         if ($date{'hour_local'} < 6) {
3474                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3475                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3476         } else {
3477                 printf(" (%02d:%02d %s)",
3478                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3479         }
3480 }
3481
3482 # Outputs the author name and date in long form
3483 sub git_print_authorship {
3484         my $co = shift;
3485         my %opts = @_;
3486         my $tag = $opts{-tag} || 'div';
3487         my $author = $co->{'author_name'};
3488
3489         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3490         print "<$tag class=\"author_date\">" .
3491               format_search_author($author, "author", esc_html($author)) .
3492               " [$ad{'rfc2822'}";
3493         print_local_time(%ad) if ($opts{-localtime});
3494         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3495                   . "</$tag>\n";
3496 }
3497
3498 # Outputs table rows containing the full author or committer information,
3499 # in the format expected for 'commit' view (& similia).
3500 # Parameters are a commit hash reference, followed by the list of people
3501 # to output information for. If the list is empty it defalts to both
3502 # author and committer.
3503 sub git_print_authorship_rows {
3504         my $co = shift;
3505         # too bad we can't use @people = @_ || ('author', 'committer')
3506         my @people = @_;
3507         @people = ('author', 'committer') unless @people;
3508         foreach my $who (@people) {
3509                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3510                 print "<tr><td>$who</td><td>" .
3511                       format_search_author($co->{"${who}_name"}, $who,
3512                                esc_html($co->{"${who}_name"})) . " " .
3513                       format_search_author($co->{"${who}_email"}, $who,
3514                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3515                       "</td><td rowspan=\"2\">" .
3516                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3517                       "</td></tr>\n" .
3518                       "<tr>" .
3519                       "<td></td><td> $wd{'rfc2822'}";
3520                 print_local_time(%wd);
3521                 print "</td>" .
3522                       "</tr>\n";
3523         }
3524 }
3525
3526 sub git_print_page_path {
3527         my $name = shift;
3528         my $type = shift;
3529         my $hb = shift;
3530
3531
3532         print "<div class=\"page_path\">";
3533         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3534                       -title => 'tree root'}, to_utf8("[$project]"));
3535         print " / ";
3536         if (defined $name) {
3537                 my @dirname = split '/', $name;
3538                 my $basename = pop @dirname;
3539                 my $fullname = '';
3540
3541                 foreach my $dir (@dirname) {
3542                         $fullname .= ($fullname ? '/' : '') . $dir;
3543                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3544                                                      hash_base=>$hb),
3545                                       -title => $fullname}, esc_path($dir));
3546                         print " / ";
3547                 }
3548                 if (defined $type && $type eq 'blob') {
3549                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3550                                                      hash_base=>$hb),
3551                                       -title => $name}, esc_path($basename));
3552                 } elsif (defined $type && $type eq 'tree') {
3553                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3554                                                      hash_base=>$hb),
3555                                       -title => $name}, esc_path($basename));
3556                         print " / ";
3557                 } else {
3558                         print esc_path($basename);
3559                 }
3560         }
3561         print "<br/></div>\n";
3562 }
3563
3564 sub git_print_log {
3565         my $log = shift;
3566         my %opts = @_;
3567
3568         if ($opts{'-remove_title'}) {
3569                 # remove title, i.e. first line of log
3570                 shift @$log;
3571         }
3572         # remove leading empty lines
3573         while (defined $log->[0] && $log->[0] eq "") {
3574                 shift @$log;
3575         }
3576
3577         # print log
3578         my $signoff = 0;
3579         my $empty = 0;
3580         foreach my $line (@$log) {
3581                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3582                         $signoff = 1;
3583                         $empty = 0;
3584                         if (! $opts{'-remove_signoff'}) {
3585                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3586                                 next;
3587                         } else {
3588                                 # remove signoff lines
3589                                 next;
3590                         }
3591                 } else {
3592                         $signoff = 0;
3593                 }
3594
3595                 # print only one empty line
3596                 # do not print empty line after signoff
3597                 if ($line eq "") {
3598                         next if ($empty || $signoff);
3599                         $empty = 1;
3600                 } else {
3601                         $empty = 0;
3602                 }
3603
3604                 print format_log_line_html($line) . "<br/>\n";
3605         }
3606
3607         if ($opts{'-final_empty_line'}) {
3608                 # end with single empty line
3609                 print "<br/>\n" unless $empty;
3610         }
3611 }
3612
3613 # return link target (what link points to)
3614 sub git_get_link_target {
3615         my $hash = shift;
3616         my $link_target;
3617
3618         # read link
3619         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3620                 or return;
3621         {
3622                 local $/ = undef;
3623                 $link_target = <$fd>;
3624         }
3625         close $fd
3626                 or return;
3627
3628         return $link_target;
3629 }
3630
3631 # given link target, and the directory (basedir) the link is in,
3632 # return target of link relative to top directory (top tree);
3633 # return undef if it is not possible (including absolute links).
3634 sub normalize_link_target {
3635         my ($link_target, $basedir) = @_;
3636
3637         # absolute symlinks (beginning with '/') cannot be normalized
3638         return if (substr($link_target, 0, 1) eq '/');
3639
3640         # normalize link target to path from top (root) tree (dir)
3641         my $path;
3642         if ($basedir) {
3643                 $path = $basedir . '/' . $link_target;
3644         } else {
3645                 # we are in top (root) tree (dir)
3646                 $path = $link_target;
3647         }
3648
3649         # remove //, /./, and /../
3650         my @path_parts;
3651         foreach my $part (split('/', $path)) {
3652                 # discard '.' and ''
3653                 next if (!$part || $part eq '.');
3654                 # handle '..'
3655                 if ($part eq '..') {
3656                         if (@path_parts) {
3657                                 pop @path_parts;
3658                         } else {
3659                                 # link leads outside repository (outside top dir)
3660                                 return;
3661                         }
3662                 } else {
3663                         push @path_parts, $part;
3664                 }
3665         }
3666         $path = join('/', @path_parts);
3667
3668         return $path;
3669 }
3670
3671 # print tree entry (row of git_tree), but without encompassing <tr> element
3672 sub git_print_tree_entry {
3673         my ($t, $basedir, $hash_base, $have_blame) = @_;
3674
3675         my %base_key = ();
3676         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3677
3678         # The format of a table row is: mode list link.  Where mode is
3679         # the mode of the entry, list is the name of the entry, an href,
3680         # and link is the action links of the entry.
3681
3682         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3683         if (exists $t->{'size'}) {
3684                 print "<td class=\"size\">$t->{'size'}</td>\n";
3685         }
3686         if ($t->{'type'} eq "blob") {
3687                 print "<td class=\"list\">" .
3688                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3689                                                file_name=>"$basedir$t->{'name'}", %base_key),
3690                                 -class => "list"}, esc_path($t->{'name'}));
3691                 if (S_ISLNK(oct $t->{'mode'})) {
3692                         my $link_target = git_get_link_target($t->{'hash'});
3693                         if ($link_target) {
3694                                 my $norm_target = normalize_link_target($link_target, $basedir);
3695                                 if (defined $norm_target) {
3696                                         print " -> " .
3697                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3698                                                                      file_name=>$norm_target),
3699                                                        -title => $norm_target}, esc_path($link_target));
3700                                 } else {
3701                                         print " -> " . esc_path($link_target);
3702                                 }
3703                         }
3704                 }
3705                 print "</td>\n";
3706                 print "<td class=\"link\">";
3707                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3708                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3709                               "blob");
3710                 if ($have_blame) {
3711                         print " | " .
3712                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3713                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3714                                       "blame");
3715                 }
3716                 if (defined $hash_base) {
3717                         print " | " .
3718                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3719                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3720                                       "history");
3721                 }
3722                 print " | " .
3723                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3724                                                file_name=>"$basedir$t->{'name'}")},
3725                                 "raw");
3726                 print "</td>\n";
3727
3728         } elsif ($t->{'type'} eq "tree") {
3729                 print "<td class=\"list\">";
3730                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3731                                              file_name=>"$basedir$t->{'name'}",
3732                                              %base_key)},
3733                               esc_path($t->{'name'}));
3734                 print "</td>\n";
3735                 print "<td class=\"link\">";
3736                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3737                                              file_name=>"$basedir$t->{'name'}",
3738                                              %base_key)},
3739                               "tree");
3740                 if (defined $hash_base) {
3741                         print " | " .
3742                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3743                                                      file_name=>"$basedir$t->{'name'}")},
3744                                       "history");
3745                 }
3746                 print "</td>\n";
3747         } else {
3748                 # unknown object: we can only present history for it
3749                 # (this includes 'commit' object, i.e. submodule support)
3750                 print "<td class=\"list\">" .
3751                       esc_path($t->{'name'}) .
3752                       "</td>\n";
3753                 print "<td class=\"link\">";
3754                 if (defined $hash_base) {
3755                         print $cgi->a({-href => href(action=>"history",
3756                                                      hash_base=>$hash_base,
3757                                                      file_name=>"$basedir$t->{'name'}")},
3758                                       "history");
3759                 }
3760                 print "</td>\n";
3761         }
3762 }
3763
3764 ## ......................................................................
3765 ## functions printing large fragments of HTML
3766
3767 # get pre-image filenames for merge (combined) diff
3768 sub fill_from_file_info {
3769         my ($diff, @parents) = @_;
3770
3771         $diff->{'from_file'} = [ ];
3772         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3773         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3774                 if ($diff->{'status'}[$i] eq 'R' ||
3775                     $diff->{'status'}[$i] eq 'C') {
3776                         $diff->{'from_file'}[$i] =
3777                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3778                 }
3779         }
3780
3781         return $diff;
3782 }
3783
3784 # is current raw difftree line of file deletion
3785 sub is_deleted {
3786         my $diffinfo = shift;
3787
3788         return $diffinfo->{'to_id'} eq ('0' x 40);
3789 }
3790
3791 # does patch correspond to [previous] difftree raw line
3792 # $diffinfo  - hashref of parsed raw diff format
3793 # $patchinfo - hashref of parsed patch diff format
3794 #              (the same keys as in $diffinfo)
3795 sub is_patch_split {
3796         my ($diffinfo, $patchinfo) = @_;
3797
3798         return defined $diffinfo && defined $patchinfo
3799                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3800 }
3801
3802
3803 sub git_difftree_body {
3804         my ($difftree, $hash, @parents) = @_;
3805         my ($parent) = $parents[0];
3806         my $have_blame = gitweb_check_feature('blame');
3807         print "<div class=\"list_head\">\n";
3808         if ($#{$difftree} > 10) {
3809                 print(($#{$difftree} + 1) . " files changed:\n");
3810         }
3811         print "</div>\n";
3812
3813         print "<table class=\"" .
3814               (@parents > 1 ? "combined " : "") .
3815               "diff_tree\">\n";
3816
3817         # header only for combined diff in 'commitdiff' view
3818         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3819         if ($has_header) {
3820                 # table header
3821                 print "<thead><tr>\n" .
3822                        "<th></th><th></th>\n"; # filename, patchN link
3823                 for (my $i = 0; $i < @parents; $i++) {
3824                         my $par = $parents[$i];
3825                         print "<th>" .
3826                               $cgi->a({-href => href(action=>"commitdiff",
3827                                                      hash=>$hash, hash_parent=>$par),
3828                                        -title => 'commitdiff to parent number ' .
3829                                                   ($i+1) . ': ' . substr($par,0,7)},
3830                                       $i+1) .
3831                               "&nbsp;</th>\n";
3832                 }
3833                 print "</tr></thead>\n<tbody>\n";
3834         }
3835
3836         my $alternate = 1;
3837         my $patchno = 0;
3838         foreach my $line (@{$difftree}) {
3839                 my $diff = parsed_difftree_line($line);
3840
3841                 if ($alternate) {
3842                         print "<tr class=\"dark\">\n";
3843                 } else {
3844                         print "<tr class=\"light\">\n";
3845                 }
3846                 $alternate ^= 1;
3847
3848                 if (exists $diff->{'nparents'}) { # combined diff
3849
3850                         fill_from_file_info($diff, @parents)
3851                                 unless exists $diff->{'from_file'};
3852
3853                         if (!is_deleted($diff)) {
3854                                 # file exists in the result (child) commit
3855                                 print "<td>" .
3856                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3857                                                              file_name=>$diff->{'to_file'},
3858                                                              hash_base=>$hash),
3859                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3860                                       "</td>\n";
3861                         } else {
3862                                 print "<td>" .
3863                                       esc_path($diff->{'to_file'}) .
3864                                       "</td>\n";
3865                         }
3866
3867                         if ($action eq 'commitdiff') {
3868                                 # link to patch
3869                                 $patchno++;
3870                                 print "<td class=\"link\">" .
3871                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3872                                       " | " .
3873                                       "</td>\n";
3874                         }
3875
3876                         my $has_history = 0;
3877                         my $not_deleted = 0;
3878                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3879                                 my $hash_parent = $parents[$i];
3880                                 my $from_hash = $diff->{'from_id'}[$i];
3881                                 my $from_path = $diff->{'from_file'}[$i];
3882                                 my $status = $diff->{'status'}[$i];
3883
3884                                 $has_history ||= ($status ne 'A');
3885                                 $not_deleted ||= ($status ne 'D');
3886
3887                                 if ($status eq 'A') {
3888                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3889                                 } elsif ($status eq 'D') {
3890                                         print "<td class=\"link\">" .
3891                                               $cgi->a({-href => href(action=>"blob",
3892                                                                      hash_base=>$hash,
3893                                                                      hash=>$from_hash,
3894                                                                      file_name=>$from_path)},
3895                                                       "blob" . ($i+1)) .
3896                                               " | </td>\n";
3897                                 } else {
3898                                         if ($diff->{'to_id'} eq $from_hash) {
3899                                                 print "<td class=\"link nochange\">";
3900                                         } else {
3901                                                 print "<td class=\"link\">";
3902                                         }
3903                                         print $cgi->a({-href => href(action=>"blobdiff",
3904                                                                      hash=>$diff->{'to_id'},
3905                                                                      hash_parent=>$from_hash,
3906                                                                      hash_base=>$hash,
3907                                                                      hash_parent_base=>$hash_parent,
3908                                                                      file_name=>$diff->{'to_file'},
3909                                                                      file_parent=>$from_path)},
3910                                                       "diff" . ($i+1)) .
3911                                               " | </td>\n";
3912                                 }
3913                         }
3914
3915                         print "<td class=\"link\">";
3916                         if ($not_deleted) {
3917                                 print $cgi->a({-href => href(action=>"blob",
3918                                                              hash=>$diff->{'to_id'},
3919                                                              file_name=>$diff->{'to_file'},
3920                                                              hash_base=>$hash)},
3921                                               "blob");
3922                                 print " | " if ($has_history);
3923                         }
3924                         if ($has_history) {
3925                                 print $cgi->a({-href => href(action=>"history",
3926                                                              file_name=>$diff->{'to_file'},
3927                                                              hash_base=>$hash)},
3928                                               "history");
3929                         }
3930                         print "</td>\n";
3931
3932                         print "</tr>\n";
3933                         next; # instead of 'else' clause, to avoid extra indent
3934                 }
3935                 # else ordinary diff
3936
3937                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3938                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3939                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3940                         $to_mode_oct = oct $diff->{'to_mode'};
3941                         if (S_ISREG($to_mode_oct)) { # only for regular file
3942                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3943                         }
3944                         $to_file_type = file_type($diff->{'to_mode'});
3945                 }
3946                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3947                         $from_mode_oct = oct $diff->{'from_mode'};
3948                         if (S_ISREG($to_mode_oct)) { # only for regular file
3949                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3950                         }
3951                         $from_file_type = file_type($diff->{'from_mode'});
3952                 }
3953
3954                 if ($diff->{'status'} eq "A") { # created
3955                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3956                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3957                         $mode_chng   .= "]</span>";
3958                         print "<td>";
3959                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3960                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3961                                       -class => "list"}, esc_path($diff->{'file'}));
3962                         print "</td>\n";
3963                         print "<td>$mode_chng</td>\n";
3964                         print "<td class=\"link\">";
3965                         if ($action eq 'commitdiff') {
3966                                 # link to patch
3967                                 $patchno++;
3968                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3969                                 print " | ";
3970                         }
3971                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3972                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3973                                       "blob");
3974                         print "</td>\n";
3975
3976                 } elsif ($diff->{'status'} eq "D") { # deleted
3977                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3978                         print "<td>";
3979                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3980                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3981                                        -class => "list"}, esc_path($diff->{'file'}));
3982                         print "</td>\n";
3983                         print "<td>$mode_chng</td>\n";
3984                         print "<td class=\"link\">";
3985                         if ($action eq 'commitdiff') {
3986                                 # link to patch
3987                                 $patchno++;
3988                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3989                                 print " | ";
3990                         }
3991                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3992                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3993                                       "blob") . " | ";
3994                         if ($have_blame) {
3995                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3996                                                              file_name=>$diff->{'file'})},
3997                                               "blame") . " | ";
3998                         }
3999                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4000                                                      file_name=>$diff->{'file'})},
4001                                       "history");
4002                         print "</td>\n";
4003
4004                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4005                         my $mode_chnge = "";
4006                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4007                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4008                                 if ($from_file_type ne $to_file_type) {
4009                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4010                                 }
4011                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4012                                         if ($from_mode_str && $to_mode_str) {
4013                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4014                                         } elsif ($to_mode_str) {
4015                                                 $mode_chnge .= " mode: $to_mode_str";
4016                                         }
4017                                 }
4018                                 $mode_chnge .= "]</span>\n";
4019                         }
4020                         print "<td>";
4021                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4022                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4023                                       -class => "list"}, esc_path($diff->{'file'}));
4024                         print "</td>\n";
4025                         print "<td>$mode_chnge</td>\n";
4026                         print "<td class=\"link\">";
4027                         if ($action eq 'commitdiff') {
4028                                 # link to patch
4029                                 $patchno++;
4030                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4031                                       " | ";
4032                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4033                                 # "commit" view and modified file (not onlu mode changed)
4034                                 print $cgi->a({-href => href(action=>"blobdiff",
4035                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4036                                                              hash_base=>$hash, hash_parent_base=>$parent,
4037                                                              file_name=>$diff->{'file'})},
4038                                               "diff") .
4039                                       " | ";
4040                         }
4041                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4042                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4043                                        "blob") . " | ";
4044                         if ($have_blame) {
4045                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4046                                                              file_name=>$diff->{'file'})},
4047                                               "blame") . " | ";
4048                         }
4049                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4050                                                      file_name=>$diff->{'file'})},
4051                                       "history");
4052                         print "</td>\n";
4053
4054                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4055                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4056                         my $nstatus = $status_name{$diff->{'status'}};
4057                         my $mode_chng = "";
4058                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4059                                 # mode also for directories, so we cannot use $to_mode_str
4060                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4061                         }
4062                         print "<td>" .
4063                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4064                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4065                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4066                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4067                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4068                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4069                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4070                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4071                               "<td class=\"link\">";
4072                         if ($action eq 'commitdiff') {
4073                                 # link to patch
4074                                 $patchno++;
4075                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4076                                       " | ";
4077                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4078                                 # "commit" view and modified file (not only pure rename or copy)
4079                                 print $cgi->a({-href => href(action=>"blobdiff",
4080                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4081                                                              hash_base=>$hash, hash_parent_base=>$parent,
4082                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4083                                               "diff") .
4084                                       " | ";
4085                         }
4086                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4087                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4088                                       "blob") . " | ";
4089                         if ($have_blame) {
4090                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4091                                                              file_name=>$diff->{'to_file'})},
4092                                               "blame") . " | ";
4093                         }
4094                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4095                                                     file_name=>$diff->{'to_file'})},
4096                                       "history");
4097                         print "</td>\n";
4098
4099                 } # we should not encounter Unmerged (U) or Unknown (X) status
4100                 print "</tr>\n";
4101         }
4102         print "</tbody>" if $has_header;
4103         print "</table>\n";
4104 }
4105
4106 sub git_patchset_body {
4107         my ($fd, $difftree, $hash, @hash_parents) = @_;
4108         my ($hash_parent) = $hash_parents[0];
4109
4110         my $is_combined = (@hash_parents > 1);
4111         my $patch_idx = 0;
4112         my $patch_number = 0;
4113         my $patch_line;
4114         my $diffinfo;
4115         my $to_name;
4116         my (%from, %to);
4117
4118         print "<div class=\"patchset\">\n";
4119
4120         # skip to first patch
4121         while ($patch_line = <$fd>) {
4122                 chomp $patch_line;
4123
4124                 last if ($patch_line =~ m/^diff /);
4125         }
4126
4127  PATCH:
4128         while ($patch_line) {
4129
4130                 # parse "git diff" header line
4131                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4132                         # $1 is from_name, which we do not use
4133                         $to_name = unquote($2);
4134                         $to_name =~ s!^b/!!;
4135                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4136                         # $1 is 'cc' or 'combined', which we do not use
4137                         $to_name = unquote($2);
4138                 } else {
4139                         $to_name = undef;
4140                 }
4141
4142                 # check if current patch belong to current raw line
4143                 # and parse raw git-diff line if needed
4144                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4145                         # this is continuation of a split patch
4146                         print "<div class=\"patch cont\">\n";
4147                 } else {
4148                         # advance raw git-diff output if needed
4149                         $patch_idx++ if defined $diffinfo;
4150
4151                         # read and prepare patch information
4152                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4153
4154                         # compact combined diff output can have some patches skipped
4155                         # find which patch (using pathname of result) we are at now;
4156                         if ($is_combined) {
4157                                 while ($to_name ne $diffinfo->{'to_file'}) {
4158                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4159                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4160                                               "</div>\n";  # class="patch"
4161
4162                                         $patch_idx++;
4163                                         $patch_number++;
4164
4165                                         last if $patch_idx > $#$difftree;
4166                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4167                                 }
4168                         }
4169
4170                         # modifies %from, %to hashes
4171                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4172
4173                         # this is first patch for raw difftree line with $patch_idx index
4174                         # we index @$difftree array from 0, but number patches from 1
4175                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4176                 }
4177
4178                 # git diff header
4179                 #assert($patch_line =~ m/^diff /) if DEBUG;
4180                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4181                 $patch_number++;
4182                 # print "git diff" header
4183                 print format_git_diff_header_line($patch_line, $diffinfo,
4184                                                   \%from, \%to);
4185
4186                 # print extended diff header
4187                 print "<div class=\"diff extended_header\">\n";
4188         EXTENDED_HEADER:
4189                 while ($patch_line = <$fd>) {
4190                         chomp $patch_line;
4191
4192                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4193
4194                         print format_extended_diff_header_line($patch_line, $diffinfo,
4195                                                                \%from, \%to);
4196                 }
4197                 print "</div>\n"; # class="diff extended_header"
4198
4199                 # from-file/to-file diff header
4200                 if (! $patch_line) {
4201                         print "</div>\n"; # class="patch"
4202                         last PATCH;
4203                 }
4204                 next PATCH if ($patch_line =~ m/^diff /);
4205                 #assert($patch_line =~ m/^---/) if DEBUG;
4206
4207                 my $last_patch_line = $patch_line;
4208                 $patch_line = <$fd>;
4209                 chomp $patch_line;
4210                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4211
4212                 print format_diff_from_to_header($last_patch_line, $patch_line,
4213                                                  $diffinfo, \%from, \%to,
4214                                                  @hash_parents);
4215
4216                 # the patch itself
4217         LINE:
4218                 while ($patch_line = <$fd>) {
4219                         chomp $patch_line;
4220
4221                         next PATCH if ($patch_line =~ m/^diff /);
4222
4223                         print format_diff_line($patch_line, \%from, \%to);
4224                 }
4225
4226         } continue {
4227                 print "</div>\n"; # class="patch"
4228         }
4229
4230         # for compact combined (--cc) format, with chunk and patch simpliciaction
4231         # patchset might be empty, but there might be unprocessed raw lines
4232         for (++$patch_idx if $patch_number > 0;
4233              $patch_idx < @$difftree;
4234              ++$patch_idx) {
4235                 # read and prepare patch information
4236                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4237
4238                 # generate anchor for "patch" links in difftree / whatchanged part
4239                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4240                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4241                       "</div>\n";  # class="patch"
4242
4243                 $patch_number++;
4244         }
4245
4246         if ($patch_number == 0) {
4247                 if (@hash_parents > 1) {
4248                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4249                 } else {
4250                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4251                 }
4252         }
4253
4254         print "</div>\n"; # class="patchset"
4255 }
4256
4257 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4258
4259 # fills project list info (age, description, owner, forks) for each
4260 # project in the list, removing invalid projects from returned list
4261 # NOTE: modifies $projlist, but does not remove entries from it
4262 sub fill_project_list_info {
4263         my ($projlist, $check_forks) = @_;
4264         my @projects;
4265
4266         my $show_ctags = gitweb_check_feature('ctags');
4267  PROJECT:
4268         foreach my $pr (@$projlist) {
4269                 my (@activity) = git_get_last_activity($pr->{'path'});
4270                 unless (@activity) {
4271                         next PROJECT;
4272                 }
4273                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4274                 if (!defined $pr->{'descr'}) {
4275                         my $descr = git_get_project_description($pr->{'path'}) || "";
4276                         $descr = to_utf8($descr);
4277                         $pr->{'descr_long'} = $descr;
4278                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4279                 }
4280                 if (!defined $pr->{'owner'}) {
4281                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4282                 }
4283                 if ($check_forks) {
4284                         my $pname = $pr->{'path'};
4285                         if (($pname =~ s/\.git$//) &&
4286                             ($pname !~ /\/$/) &&
4287                             (-d "$projectroot/$pname")) {
4288                                 $pr->{'forks'} = "-d $projectroot/$pname";
4289                         } else {
4290                                 $pr->{'forks'} = 0;
4291                         }
4292                 }
4293                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4294                 push @projects, $pr;
4295         }
4296
4297         return @projects;
4298 }
4299
4300 # print 'sort by' <th> element, generating 'sort by $name' replay link
4301 # if that order is not selected
4302 sub print_sort_th {
4303         my ($name, $order, $header) = @_;
4304         $header ||= ucfirst($name);
4305
4306         if ($order eq $name) {
4307                 print "<th>$header</th>\n";
4308         } else {
4309                 print "<th>" .
4310                       $cgi->a({-href => href(-replay=>1, order=>$name),
4311                                -class => "header"}, $header) .
4312                       "</th>\n";
4313         }
4314 }
4315
4316 sub git_project_list_body {
4317         # actually uses global variable $project
4318         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4319
4320         my $check_forks = gitweb_check_feature('forks');
4321         my @projects = fill_project_list_info($projlist, $check_forks);
4322
4323         $order ||= $default_projects_order;
4324         $from = 0 unless defined $from;
4325         $to = $#projects if (!defined $to || $#projects < $to);
4326
4327         my %order_info = (
4328                 project => { key => 'path', type => 'str' },
4329                 descr => { key => 'descr_long', type => 'str' },
4330                 owner => { key => 'owner', type => 'str' },
4331                 age => { key => 'age', type => 'num' }
4332         );
4333         my $oi = $order_info{$order};
4334         if ($oi->{'type'} eq 'str') {
4335                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4336         } else {
4337                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4338         }
4339
4340         my $show_ctags = gitweb_check_feature('ctags');
4341         if ($show_ctags) {
4342                 my %ctags;
4343                 foreach my $p (@projects) {
4344                         foreach my $ct (keys %{$p->{'ctags'}}) {
4345                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4346                         }
4347                 }
4348                 my $cloud = git_populate_project_tagcloud(\%ctags);
4349                 print git_show_project_tagcloud($cloud, 64);
4350         }
4351
4352         print "<table class=\"project_list\">\n";
4353         unless ($no_header) {
4354                 print "<tr>\n";
4355                 if ($check_forks) {
4356                         print "<th></th>\n";
4357                 }
4358                 print_sort_th('project', $order, 'Project');
4359                 print_sort_th('descr', $order, 'Description');
4360                 print_sort_th('owner', $order, 'Owner');
4361                 print_sort_th('age', $order, 'Last Change');
4362                 print "<th></th>\n" . # for links
4363                       "</tr>\n";
4364         }
4365         my $alternate = 1;
4366         my $tagfilter = $cgi->param('by_tag');
4367         for (my $i = $from; $i <= $to; $i++) {
4368                 my $pr = $projects[$i];
4369
4370                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4371                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4372                         and not $pr->{'descr_long'} =~ /$searchtext/;
4373                 # Weed out forks or non-matching entries of search
4374                 if ($check_forks) {
4375                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4376                         $forkbase="^$forkbase" if $forkbase;
4377                         next if not $searchtext and not $tagfilter and $show_ctags
4378                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4379                 }
4380
4381                 if ($alternate) {
4382                         print "<tr class=\"dark\">\n";
4383                 } else {
4384                         print "<tr class=\"light\">\n";
4385                 }
4386                 $alternate ^= 1;
4387                 if ($check_forks) {
4388                         print "<td>";
4389                         if ($pr->{'forks'}) {
4390                                 print "<!-- $pr->{'forks'} -->\n";
4391                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4392                         }
4393                         print "</td>\n";
4394                 }
4395                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4396                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4397                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4398                                         -class => "list", -title => $pr->{'descr_long'}},
4399                                         esc_html($pr->{'descr'})) . "</td>\n" .
4400                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4401                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4402                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4403                       "<td class=\"link\">" .
4404                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4405                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4406                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4407                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4408                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4409                       "</td>\n" .
4410                       "</tr>\n";
4411         }
4412         if (defined $extra) {
4413                 print "<tr>\n";
4414                 if ($check_forks) {
4415                         print "<td></td>\n";
4416                 }
4417                 print "<td colspan=\"5\">$extra</td>\n" .
4418                       "</tr>\n";
4419         }
4420         print "</table>\n";
4421 }
4422
4423 sub git_shortlog_body {
4424         # uses global variable $project
4425         my ($commitlist, $from, $to, $refs, $extra) = @_;
4426
4427         $from = 0 unless defined $from;
4428         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4429
4430         print "<table class=\"shortlog\">\n";
4431         my $alternate = 1;
4432         for (my $i = $from; $i <= $to; $i++) {
4433                 my %co = %{$commitlist->[$i]};
4434                 my $commit = $co{'id'};
4435                 my $ref = format_ref_marker($refs, $commit);
4436                 if ($alternate) {
4437                         print "<tr class=\"dark\">\n";
4438                 } else {
4439                         print "<tr class=\"light\">\n";
4440                 }
4441                 $alternate ^= 1;
4442                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4443                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4444                       format_author_html('td', \%co, 10) . "<td>";
4445                 print format_subject_html($co{'title'}, $co{'title_short'},
4446                                           href(action=>"commit", hash=>$commit), $ref);
4447                 print "</td>\n" .
4448                       "<td class=\"link\">" .
4449                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4450                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4451                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4452                 my $snapshot_links = format_snapshot_links($commit);
4453                 if (defined $snapshot_links) {
4454                         print " | " . $snapshot_links;
4455                 }
4456                 print "</td>\n" .
4457                       "</tr>\n";
4458         }
4459         if (defined $extra) {
4460                 print "<tr>\n" .
4461                       "<td colspan=\"4\">$extra</td>\n" .
4462                       "</tr>\n";
4463         }
4464         print "</table>\n";
4465 }
4466
4467 sub git_history_body {
4468         # Warning: assumes constant type (blob or tree) during history
4469         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4470
4471         $from = 0 unless defined $from;
4472         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4473
4474         print "<table class=\"history\">\n";
4475         my $alternate = 1;
4476         for (my $i = $from; $i <= $to; $i++) {
4477                 my %co = %{$commitlist->[$i]};
4478                 if (!%co) {
4479                         next;
4480                 }
4481                 my $commit = $co{'id'};
4482
4483                 my $ref = format_ref_marker($refs, $commit);
4484
4485                 if ($alternate) {
4486                         print "<tr class=\"dark\">\n";
4487                 } else {
4488                         print "<tr class=\"light\">\n";
4489                 }
4490                 $alternate ^= 1;
4491                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4492         # shortlog:   format_author_html('td', \%co, 10)
4493                       format_author_html('td', \%co, 15, 3) . "<td>";
4494                 # originally git_history used chop_str($co{'title'}, 50)
4495                 print format_subject_html($co{'title'}, $co{'title_short'},
4496                                           href(action=>"commit", hash=>$commit), $ref);
4497                 print "</td>\n" .
4498                       "<td class=\"link\">" .
4499                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4500                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4501
4502                 if ($ftype eq 'blob') {
4503                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4504                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4505                         if (defined $blob_current && defined $blob_parent &&
4506                                         $blob_current ne $blob_parent) {
4507                                 print " | " .
4508                                         $cgi->a({-href => href(action=>"blobdiff",
4509                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4510                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4511                                                                file_name=>$file_name)},
4512                                                 "diff to current");
4513                         }
4514                 }
4515                 print "</td>\n" .
4516                       "</tr>\n";
4517         }
4518         if (defined $extra) {
4519                 print "<tr>\n" .
4520                       "<td colspan=\"4\">$extra</td>\n" .
4521                       "</tr>\n";
4522         }
4523         print "</table>\n";
4524 }
4525
4526 sub git_tags_body {
4527         # uses global variable $project
4528         my ($taglist, $from, $to, $extra) = @_;
4529         $from = 0 unless defined $from;
4530         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4531
4532         print "<table class=\"tags\">\n";
4533         my $alternate = 1;
4534         for (my $i = $from; $i <= $to; $i++) {
4535                 my $entry = $taglist->[$i];
4536                 my %tag = %$entry;
4537                 my $comment = $tag{'subject'};
4538                 my $comment_short;
4539                 if (defined $comment) {
4540                         $comment_short = chop_str($comment, 30, 5);
4541                 }
4542                 if ($alternate) {
4543                         print "<tr class=\"dark\">\n";
4544                 } else {
4545                         print "<tr class=\"light\">\n";
4546                 }
4547                 $alternate ^= 1;
4548                 if (defined $tag{'age'}) {
4549                         print "<td><i>$tag{'age'}</i></td>\n";
4550                 } else {
4551                         print "<td></td>\n";
4552                 }
4553                 print "<td>" .
4554                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4555                                -class => "list name"}, esc_html($tag{'name'})) .
4556                       "</td>\n" .
4557                       "<td>";
4558                 if (defined $comment) {
4559                         print format_subject_html($comment, $comment_short,
4560                                                   href(action=>"tag", hash=>$tag{'id'}));
4561                 }
4562                 print "</td>\n" .
4563                       "<td class=\"selflink\">";
4564                 if ($tag{'type'} eq "tag") {
4565                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4566                 } else {
4567                         print "&nbsp;";
4568                 }
4569                 print "</td>\n" .
4570                       "<td class=\"link\">" . " | " .
4571                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4572                 if ($tag{'reftype'} eq "commit") {
4573                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4574                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4575                 } elsif ($tag{'reftype'} eq "blob") {
4576                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4577                 }
4578                 print "</td>\n" .
4579                       "</tr>";
4580         }
4581         if (defined $extra) {
4582                 print "<tr>\n" .
4583                       "<td colspan=\"5\">$extra</td>\n" .
4584                       "</tr>\n";
4585         }
4586         print "</table>\n";
4587 }
4588
4589 sub git_heads_body {
4590         # uses global variable $project
4591         my ($headlist, $head, $from, $to, $extra) = @_;
4592         $from = 0 unless defined $from;
4593         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4594
4595         print "<table class=\"heads\">\n";
4596         my $alternate = 1;
4597         for (my $i = $from; $i <= $to; $i++) {
4598                 my $entry = $headlist->[$i];
4599                 my %ref = %$entry;
4600                 my $curr = $ref{'id'} eq $head;
4601                 if ($alternate) {
4602                         print "<tr class=\"dark\">\n";
4603                 } else {
4604                         print "<tr class=\"light\">\n";
4605                 }
4606                 $alternate ^= 1;
4607                 print "<td><i>$ref{'age'}</i></td>\n" .
4608                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4609                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4610                                -class => "list name"},esc_html($ref{'name'})) .
4611                       "</td>\n" .
4612                       "<td class=\"link\">" .
4613                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4614                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4615                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4616                       "</td>\n" .
4617                       "</tr>";
4618         }
4619         if (defined $extra) {
4620                 print "<tr>\n" .
4621                       "<td colspan=\"3\">$extra</td>\n" .
4622                       "</tr>\n";
4623         }
4624         print "</table>\n";
4625 }
4626
4627 sub git_search_grep_body {
4628         my ($commitlist, $from, $to, $extra) = @_;
4629         $from = 0 unless defined $from;
4630         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4631
4632         print "<table class=\"commit_search\">\n";
4633         my $alternate = 1;
4634         for (my $i = $from; $i <= $to; $i++) {
4635                 my %co = %{$commitlist->[$i]};
4636                 if (!%co) {
4637                         next;
4638                 }
4639                 my $commit = $co{'id'};
4640                 if ($alternate) {
4641                         print "<tr class=\"dark\">\n";
4642                 } else {
4643                         print "<tr class=\"light\">\n";
4644                 }
4645                 $alternate ^= 1;
4646                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4647                       format_author_html('td', \%co, 15, 5) .
4648                       "<td>" .
4649                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4650                                -class => "list subject"},
4651                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4652                 my $comment = $co{'comment'};
4653                 foreach my $line (@$comment) {
4654                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4655                                 my ($lead, $match, $trail) = ($1, $2, $3);
4656                                 $match = chop_str($match, 70, 5, 'center');
4657                                 my $contextlen = int((80 - length($match))/2);
4658                                 $contextlen = 30 if ($contextlen > 30);
4659                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4660                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4661
4662                                 $lead  = esc_html($lead);
4663                                 $match = esc_html($match);
4664                                 $trail = esc_html($trail);
4665
4666                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4667                         }
4668                 }
4669                 print "</td>\n" .
4670                       "<td class=\"link\">" .
4671                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4672                       " | " .
4673                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4674                       " | " .
4675                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4676                 print "</td>\n" .
4677                       "</tr>\n";
4678         }
4679         if (defined $extra) {
4680                 print "<tr>\n" .
4681                       "<td colspan=\"3\">$extra</td>\n" .
4682                       "</tr>\n";
4683         }
4684         print "</table>\n";
4685 }
4686
4687 ## ======================================================================
4688 ## ======================================================================
4689 ## actions
4690
4691 sub git_project_list {
4692         my $order = $input_params{'order'};
4693         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4694                 die_error(400, "Unknown order parameter");
4695         }
4696
4697         my @list = git_get_projects_list();
4698         if (!@list) {
4699                 die_error(404, "No projects found");
4700         }
4701
4702         git_header_html();
4703         if (-f $home_text) {
4704                 print "<div class=\"index_include\">\n";
4705                 insert_file($home_text);
4706                 print "</div>\n";
4707         }
4708         print $cgi->startform(-method => "get") .
4709               "<p class=\"projsearch\">Search:\n" .
4710               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4711               "</p>" .
4712               $cgi->end_form() . "\n";
4713         git_project_list_body(\@list, $order);
4714         git_footer_html();
4715 }
4716
4717 sub git_forks {
4718         my $order = $input_params{'order'};
4719         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4720                 die_error(400, "Unknown order parameter");
4721         }
4722
4723         my @list = git_get_projects_list($project);
4724         if (!@list) {
4725                 die_error(404, "No forks found");
4726         }
4727
4728         git_header_html();
4729         git_print_page_nav('','');
4730         git_print_header_div('summary', "$project forks");
4731         git_project_list_body(\@list, $order);
4732         git_footer_html();
4733 }
4734
4735 sub git_project_index {
4736         my @projects = git_get_projects_list($project);
4737
4738         print $cgi->header(
4739                 -type => 'text/plain',
4740                 -charset => 'utf-8',
4741                 -content_disposition => 'inline; filename="index.aux"');
4742
4743         foreach my $pr (@projects) {
4744                 if (!exists $pr->{'owner'}) {
4745                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4746                 }
4747
4748                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4749                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4750                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4751                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4752                 $path  =~ s/ /\+/g;
4753                 $owner =~ s/ /\+/g;
4754
4755                 print "$path $owner\n";
4756         }
4757 }
4758
4759 sub git_summary {
4760         my $descr = git_get_project_description($project) || "none";
4761         my %co = parse_commit("HEAD");
4762         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4763         my $head = $co{'id'};
4764
4765         my $owner = git_get_project_owner($project);
4766
4767         my $refs = git_get_references();
4768         # These get_*_list functions return one more to allow us to see if
4769         # there are more ...
4770         my @taglist  = git_get_tags_list(16);
4771         my @headlist = git_get_heads_list(16);
4772         my @forklist;
4773         my $check_forks = gitweb_check_feature('forks');
4774
4775         if ($check_forks) {
4776                 @forklist = git_get_projects_list($project);
4777         }
4778
4779         git_header_html();
4780         git_print_page_nav('summary','', $head);
4781
4782         print "<div class=\"title\">&nbsp;</div>\n";
4783         print "<table class=\"projects_list\">\n" .
4784               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4785               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4786         if (defined $cd{'rfc2822'}) {
4787                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4788         }
4789
4790         # use per project git URL list in $projectroot/$project/cloneurl
4791         # or make project git URL from git base URL and project name
4792         my $url_tag = "URL";
4793         my @url_list = git_get_project_url_list($project);
4794         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4795         foreach my $git_url (@url_list) {
4796                 next unless $git_url;
4797                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4798                 $url_tag = "";
4799         }
4800
4801         # Tag cloud
4802         my $show_ctags = gitweb_check_feature('ctags');
4803         if ($show_ctags) {
4804                 my $ctags = git_get_project_ctags($project);
4805                 my $cloud = git_populate_project_tagcloud($ctags);
4806                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4807                 print "</td>\n<td>" unless %$ctags;
4808                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4809                 print "</td>\n<td>" if %$ctags;
4810                 print git_show_project_tagcloud($cloud, 48);
4811                 print "</td></tr>";
4812         }
4813
4814         print "</table>\n";
4815
4816         # If XSS prevention is on, we don't include README.html.
4817         # TODO: Allow a readme in some safe format.
4818         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4819                 print "<div class=\"title\">readme</div>\n" .
4820                       "<div class=\"readme\">\n";
4821                 insert_file("$projectroot/$project/README.html");
4822                 print "\n</div>\n"; # class="readme"
4823         }
4824
4825         # we need to request one more than 16 (0..15) to check if
4826         # those 16 are all
4827         my @commitlist = $head ? parse_commits($head, 17) : ();
4828         if (@commitlist) {
4829                 git_print_header_div('shortlog');
4830                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4831                                   $#commitlist <=  15 ? undef :
4832                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4833         }
4834
4835         if (@taglist) {
4836                 git_print_header_div('tags');
4837                 git_tags_body(\@taglist, 0, 15,
4838                               $#taglist <=  15 ? undef :
4839                               $cgi->a({-href => href(action=>"tags")}, "..."));
4840         }
4841
4842         if (@headlist) {
4843                 git_print_header_div('heads');
4844                 git_heads_body(\@headlist, $head, 0, 15,
4845                                $#headlist <= 15 ? undef :
4846                                $cgi->a({-href => href(action=>"heads")}, "..."));
4847         }
4848
4849         if (@forklist) {
4850                 git_print_header_div('forks');
4851                 git_project_list_body(\@forklist, 'age', 0, 15,
4852                                       $#forklist <= 15 ? undef :
4853                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4854                                       'no_header');
4855         }
4856
4857         git_footer_html();
4858 }
4859
4860 sub git_tag {
4861         my $head = git_get_head_hash($project);
4862         git_header_html();
4863         git_print_page_nav('','', $head,undef,$head);
4864         my %tag = parse_tag($hash);
4865
4866         if (! %tag) {
4867                 die_error(404, "Unknown tag object");
4868         }
4869
4870         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4871         print "<div class=\"title_text\">\n" .
4872               "<table class=\"object_header\">\n" .
4873               "<tr>\n" .
4874               "<td>object</td>\n" .
4875               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4876                                $tag{'object'}) . "</td>\n" .
4877               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4878                                               $tag{'type'}) . "</td>\n" .
4879               "</tr>\n";
4880         if (defined($tag{'author'})) {
4881                 git_print_authorship_rows(\%tag, 'author');
4882         }
4883         print "</table>\n\n" .
4884               "</div>\n";
4885         print "<div class=\"page_body\">";
4886         my $comment = $tag{'comment'};
4887         foreach my $line (@$comment) {
4888                 chomp $line;
4889                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4890         }
4891         print "</div>\n";
4892         git_footer_html();
4893 }
4894
4895 sub git_blame_common {
4896         my $format = shift || 'porcelain';
4897         if ($format eq 'porcelain' && $cgi->param('js')) {
4898                 $format = 'incremental';
4899                 $action = 'blame_incremental'; # for page title etc
4900         }
4901
4902         # permissions
4903         gitweb_check_feature('blame')
4904                 or die_error(403, "Blame view not allowed");
4905
4906         # error checking
4907         die_error(400, "No file name given") unless $file_name;
4908         $hash_base ||= git_get_head_hash($project);
4909         die_error(404, "Couldn't find base commit") unless $hash_base;
4910         my %co = parse_commit($hash_base)
4911                 or die_error(404, "Commit not found");
4912         my $ftype = "blob";
4913         if (!defined $hash) {
4914                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4915                         or die_error(404, "Error looking up file");
4916         } else {
4917                 $ftype = git_get_type($hash);
4918                 if ($ftype !~ "blob") {
4919                         die_error(400, "Object is not a blob");
4920                 }
4921         }
4922
4923         my $fd;
4924         if ($format eq 'incremental') {
4925                 # get file contents (as base)
4926                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
4927                         or die_error(500, "Open git-cat-file failed");
4928         } elsif ($format eq 'data') {
4929                 # run git-blame --incremental
4930                 open $fd, "-|", git_cmd(), "blame", "--incremental",
4931                         $hash_base, "--", $file_name
4932                         or die_error(500, "Open git-blame --incremental failed");
4933         } else {
4934                 # run git-blame --porcelain
4935                 open $fd, "-|", git_cmd(), "blame", '-p',
4936                         $hash_base, '--', $file_name
4937                         or die_error(500, "Open git-blame --porcelain failed");
4938         }
4939
4940         # incremental blame data returns early
4941         if ($format eq 'data') {
4942                 print $cgi->header(
4943                         -type=>"text/plain", -charset => "utf-8",
4944                         -status=> "200 OK");
4945                 local $| = 1; # output autoflush
4946                 print while <$fd>;
4947                 close $fd
4948                         or print "ERROR $!\n";
4949
4950                 print 'END';
4951                 if (defined $t0 && gitweb_check_feature('timed')) {
4952                         print ' '.
4953                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
4954                               ' '.$number_of_git_cmds;
4955                 }
4956                 print "\n";
4957
4958                 return;
4959         }
4960
4961         # page header
4962         git_header_html();
4963         my $formats_nav =
4964                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4965                         "blob") .
4966                 " | " .
4967                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4968                         "history") .
4969                 " | " .
4970                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
4971                         "HEAD");
4972         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4973         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4974         git_print_page_path($file_name, $ftype, $hash_base);
4975
4976         # page body
4977         if ($format eq 'incremental') {
4978                 print "<noscript>\n<div class=\"error\"><center><b>\n".
4979                       "This page requires JavaScript to run.\n Use ".
4980                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
4981                               'this page').
4982                       " instead.\n".
4983                       "</b></center></div>\n</noscript>\n";
4984
4985                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
4986         }
4987
4988         print qq!<div class="page_body">\n!;
4989         print qq!<div id="progress_info">... / ...</div>\n!
4990                 if ($format eq 'incremental');
4991         print qq!<table id="blame_table" class="blame" width="100%">\n!.
4992               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
4993               qq!<thead>\n!.
4994               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
4995               qq!</thead>\n!.
4996               qq!<tbody>\n!;
4997
4998         my @rev_color = qw(light dark);
4999         my $num_colors = scalar(@rev_color);
5000         my $current_color = 0;
5001
5002         if ($format eq 'incremental') {
5003                 my $color_class = $rev_color[$current_color];
5004
5005                 #contents of a file
5006                 my $linenr = 0;
5007         LINE:
5008                 while (my $line = <$fd>) {
5009                         chomp $line;
5010                         $linenr++;
5011
5012                         print qq!<tr id="l$linenr" class="$color_class">!.
5013                               qq!<td class="sha1"><a href=""> </a></td>!.
5014                               qq!<td class="linenr">!.
5015                               qq!<a class="linenr" href="">$linenr</a></td>!;
5016                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5017                         print qq!</tr>\n!;
5018                 }
5019
5020         } else { # porcelain, i.e. ordinary blame
5021                 my %metainfo = (); # saves information about commits
5022
5023                 # blame data
5024         LINE:
5025                 while (my $line = <$fd>) {
5026                         chomp $line;
5027                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5028                         # no <lines in group> for subsequent lines in group of lines
5029                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5030                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5031                         if (!exists $metainfo{$full_rev}) {
5032                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5033                         }
5034                         my $meta = $metainfo{$full_rev};
5035                         my $data;
5036                         while ($data = <$fd>) {
5037                                 chomp $data;
5038                                 last if ($data =~ s/^\t//); # contents of line
5039                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5040                                         $meta->{$1} = $2 unless exists $meta->{$1};
5041                                 }
5042                                 if ($data =~ /^previous /) {
5043                                         $meta->{'nprevious'}++;
5044                                 }
5045                         }
5046                         my $short_rev = substr($full_rev, 0, 8);
5047                         my $author = $meta->{'author'};
5048                         my %date =
5049                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5050                         my $date = $date{'iso-tz'};
5051                         if ($group_size) {
5052                                 $current_color = ($current_color + 1) % $num_colors;
5053                         }
5054                         my $tr_class = $rev_color[$current_color];
5055                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5056                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5057                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5058                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5059                         if ($group_size) {
5060                                 print "<td class=\"sha1\"";
5061                                 print " title=\"". esc_html($author) . ", $date\"";
5062                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5063                                 print ">";
5064                                 print $cgi->a({-href => href(action=>"commit",
5065                                                              hash=>$full_rev,
5066                                                              file_name=>$file_name)},
5067                                               esc_html($short_rev));
5068                                 if ($group_size >= 2) {
5069                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5070                                         if (@author_initials) {
5071                                                 print "<br />" .
5072                                                       esc_html(join('', @author_initials));
5073                                                 #           or join('.', ...)
5074                                         }
5075                                 }
5076                                 print "</td>\n";
5077                         }
5078                         # 'previous' <sha1 of parent commit> <filename at commit>
5079                         if (exists $meta->{'previous'} &&
5080                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5081                                 $meta->{'parent'} = $1;
5082                                 $meta->{'file_parent'} = unquote($2);
5083                         }
5084                         my $linenr_commit =
5085                                 exists($meta->{'parent'}) ?
5086                                 $meta->{'parent'} : $full_rev;
5087                         my $linenr_filename =
5088                                 exists($meta->{'file_parent'}) ?
5089                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5090                         my $blamed = href(action => 'blame',
5091                                           file_name => $linenr_filename,
5092                                           hash_base => $linenr_commit);
5093                         print "<td class=\"linenr\">";
5094                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5095                                         -class => "linenr" },
5096                                       esc_html($lineno));
5097                         print "</td>";
5098                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5099                         print "</tr>\n";
5100                 } # end while
5101
5102         }
5103
5104         # footer
5105         print "</tbody>\n".
5106               "</table>\n"; # class="blame"
5107         print "</div>\n";   # class="blame_body"
5108         close $fd
5109                 or print "Reading blob failed\n";
5110
5111         git_footer_html();
5112 }
5113
5114 sub git_blame {
5115         git_blame_common();
5116 }
5117
5118 sub git_blame_incremental {
5119         git_blame_common('incremental');
5120 }
5121
5122 sub git_blame_data {
5123         git_blame_common('data');
5124 }
5125
5126 sub git_tags {
5127         my $head = git_get_head_hash($project);
5128         git_header_html();
5129         git_print_page_nav('','', $head,undef,$head);
5130         git_print_header_div('summary', $project);
5131
5132         my @tagslist = git_get_tags_list();
5133         if (@tagslist) {
5134                 git_tags_body(\@tagslist);
5135         }
5136         git_footer_html();
5137 }
5138
5139 sub git_heads {
5140         my $head = git_get_head_hash($project);
5141         git_header_html();
5142         git_print_page_nav('','', $head,undef,$head);
5143         git_print_header_div('summary', $project);
5144
5145         my @headslist = git_get_heads_list();
5146         if (@headslist) {
5147                 git_heads_body(\@headslist, $head);
5148         }
5149         git_footer_html();
5150 }
5151
5152 sub git_blob_plain {
5153         my $type = shift;
5154         my $expires;
5155
5156         if (!defined $hash) {
5157                 if (defined $file_name) {
5158                         my $base = $hash_base || git_get_head_hash($project);
5159                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5160                                 or die_error(404, "Cannot find file");
5161                 } else {
5162                         die_error(400, "No file name defined");
5163                 }
5164         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5165                 # blobs defined by non-textual hash id's can be cached
5166                 $expires = "+1d";
5167         }
5168
5169         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5170                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5171
5172         # content-type (can include charset)
5173         $type = blob_contenttype($fd, $file_name, $type);
5174
5175         # "save as" filename, even when no $file_name is given
5176         my $save_as = "$hash";
5177         if (defined $file_name) {
5178                 $save_as = $file_name;
5179         } elsif ($type =~ m/^text\//) {
5180                 $save_as .= '.txt';
5181         }
5182
5183         # With XSS prevention on, blobs of all types except a few known safe
5184         # ones are served with "Content-Disposition: attachment" to make sure
5185         # they don't run in our security domain.  For certain image types,
5186         # blob view writes an <img> tag referring to blob_plain view, and we
5187         # want to be sure not to break that by serving the image as an
5188         # attachment (though Firefox 3 doesn't seem to care).
5189         my $sandbox = $prevent_xss &&
5190                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5191
5192         print $cgi->header(
5193                 -type => $type,
5194                 -expires => $expires,
5195                 -content_disposition =>
5196                         ($sandbox ? 'attachment' : 'inline')
5197                         . '; filename="' . $save_as . '"');
5198         local $/ = undef;
5199         binmode STDOUT, ':raw';
5200         print <$fd>;
5201         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5202         close $fd;
5203 }
5204
5205 sub git_blob {
5206         my $expires;
5207
5208         if (!defined $hash) {
5209                 if (defined $file_name) {
5210                         my $base = $hash_base || git_get_head_hash($project);
5211                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5212                                 or die_error(404, "Cannot find file");
5213                 } else {
5214                         die_error(400, "No file name defined");
5215                 }
5216         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5217                 # blobs defined by non-textual hash id's can be cached
5218                 $expires = "+1d";
5219         }
5220
5221         my $have_blame = gitweb_check_feature('blame');
5222         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5223                 or die_error(500, "Couldn't cat $file_name, $hash");
5224         my $mimetype = blob_mimetype($fd, $file_name);
5225         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5226                 close $fd;
5227                 return git_blob_plain($mimetype);
5228         }
5229         # we can have blame only for text/* mimetype
5230         $have_blame &&= ($mimetype =~ m!^text/!);
5231
5232         git_header_html(undef, $expires);
5233         my $formats_nav = '';
5234         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5235                 if (defined $file_name) {
5236                         if ($have_blame) {
5237                                 $formats_nav .=
5238                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5239                                                 "blame") .
5240                                         " | ";
5241                         }
5242                         $formats_nav .=
5243                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5244                                         "history") .
5245                                 " | " .
5246                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5247                                         "raw") .
5248                                 " | " .
5249                                 $cgi->a({-href => href(action=>"blob",
5250                                                        hash_base=>"HEAD", file_name=>$file_name)},
5251                                         "HEAD");
5252                 } else {
5253                         $formats_nav .=
5254                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5255                                         "raw");
5256                 }
5257                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5258                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5259         } else {
5260                 print "<div class=\"page_nav\">\n" .
5261                       "<br/><br/></div>\n" .
5262                       "<div class=\"title\">$hash</div>\n";
5263         }
5264         git_print_page_path($file_name, "blob", $hash_base);
5265         print "<div class=\"page_body\">\n";
5266         if ($mimetype =~ m!^image/!) {
5267                 print qq!<img type="$mimetype"!;
5268                 if ($file_name) {
5269                         print qq! alt="$file_name" title="$file_name"!;
5270                 }
5271                 print qq! src="! .
5272                       href(action=>"blob_plain", hash=>$hash,
5273                            hash_base=>$hash_base, file_name=>$file_name) .
5274                       qq!" />\n!;
5275         } else {
5276                 my $nr;
5277                 while (my $line = <$fd>) {
5278                         chomp $line;
5279                         $nr++;
5280                         $line = untabify($line);
5281                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5282                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5283                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5284                 }
5285         }
5286         close $fd
5287                 or print "Reading blob failed.\n";
5288         print "</div>";
5289         git_footer_html();
5290 }
5291
5292 sub git_tree {
5293         if (!defined $hash_base) {
5294                 $hash_base = "HEAD";
5295         }
5296         if (!defined $hash) {
5297                 if (defined $file_name) {
5298                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5299                 } else {
5300                         $hash = $hash_base;
5301                 }
5302         }
5303         die_error(404, "No such tree") unless defined($hash);
5304
5305         my $show_sizes = gitweb_check_feature('show-sizes');
5306         my $have_blame = gitweb_check_feature('blame');
5307
5308         my @entries = ();
5309         {
5310                 local $/ = "\0";
5311                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5312                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5313                         or die_error(500, "Open git-ls-tree failed");
5314                 @entries = map { chomp; $_ } <$fd>;
5315                 close $fd
5316                         or die_error(404, "Reading tree failed");
5317         }
5318
5319         my $refs = git_get_references();
5320         my $ref = format_ref_marker($refs, $hash_base);
5321         git_header_html();
5322         my $basedir = '';
5323         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5324                 my @views_nav = ();
5325                 if (defined $file_name) {
5326                         push @views_nav,
5327                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5328                                         "history"),
5329                                 $cgi->a({-href => href(action=>"tree",
5330                                                        hash_base=>"HEAD", file_name=>$file_name)},
5331                                         "HEAD"),
5332                 }
5333                 my $snapshot_links = format_snapshot_links($hash);
5334                 if (defined $snapshot_links) {
5335                         # FIXME: Should be available when we have no hash base as well.
5336                         push @views_nav, $snapshot_links;
5337                 }
5338                 git_print_page_nav('tree','', $hash_base, undef, undef,
5339                                    join(' | ', @views_nav));
5340                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5341         } else {
5342                 undef $hash_base;
5343                 print "<div class=\"page_nav\">\n";
5344                 print "<br/><br/></div>\n";
5345                 print "<div class=\"title\">$hash</div>\n";
5346         }
5347         if (defined $file_name) {
5348                 $basedir = $file_name;
5349                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5350                         $basedir .= '/';
5351                 }
5352                 git_print_page_path($file_name, 'tree', $hash_base);
5353         }
5354         print "<div class=\"page_body\">\n";
5355         print "<table class=\"tree\">\n";
5356         my $alternate = 1;
5357         # '..' (top directory) link if possible
5358         if (defined $hash_base &&
5359             defined $file_name && $file_name =~ m![^/]+$!) {
5360                 if ($alternate) {
5361                         print "<tr class=\"dark\">\n";
5362                 } else {
5363                         print "<tr class=\"light\">\n";
5364                 }
5365                 $alternate ^= 1;
5366
5367                 my $up = $file_name;
5368                 $up =~ s!/?[^/]+$!!;
5369                 undef $up unless $up;
5370                 # based on git_print_tree_entry
5371                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5372                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5373                 print '<td class="list">';
5374                 print $cgi->a({-href => href(action=>"tree",
5375                                              hash_base=>$hash_base,
5376                                              file_name=>$up)},
5377                               "..");
5378                 print "</td>\n";
5379                 print "<td class=\"link\"></td>\n";
5380
5381                 print "</tr>\n";
5382         }
5383         foreach my $line (@entries) {
5384                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5385
5386                 if ($alternate) {
5387                         print "<tr class=\"dark\">\n";
5388                 } else {
5389                         print "<tr class=\"light\">\n";
5390                 }
5391                 $alternate ^= 1;
5392
5393                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5394
5395                 print "</tr>\n";
5396         }
5397         print "</table>\n" .
5398               "</div>";
5399         git_footer_html();
5400 }
5401
5402 sub snapshot_name {
5403         my ($project, $hash) = @_;
5404
5405         # path/to/project.git  -> project
5406         # path/to/project/.git -> project
5407         my $name = to_utf8($project);
5408         $name =~ s,([^/])/*\.git$,$1,;
5409         $name = basename($name);
5410         # sanitize name
5411         $name =~ s/[[:cntrl:]]/?/g;
5412
5413         my $ver = $hash;
5414         if ($hash =~ /^[0-9a-fA-F]+$/) {
5415                 # shorten SHA-1 hash
5416                 my $full_hash = git_get_full_hash($project, $hash);
5417                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5418                         $ver = git_get_short_hash($project, $hash);
5419                 }
5420         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5421                 # tags don't need shortened SHA-1 hash
5422                 $ver = $1;
5423         } else {
5424                 # branches and other need shortened SHA-1 hash
5425                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5426                         $ver = $1;
5427                 }
5428                 $ver .= '-' . git_get_short_hash($project, $hash);
5429         }
5430         # in case of hierarchical branch names
5431         $ver =~ s!/!.!g;
5432
5433         # name = project-version_string
5434         $name = "$name-$ver";
5435
5436         return wantarray ? ($name, $name) : $name;
5437 }
5438
5439 sub git_snapshot {
5440         my $format = $input_params{'snapshot_format'};
5441         if (!@snapshot_fmts) {
5442                 die_error(403, "Snapshots not allowed");
5443         }
5444         # default to first supported snapshot format
5445         $format ||= $snapshot_fmts[0];
5446         if ($format !~ m/^[a-z0-9]+$/) {
5447                 die_error(400, "Invalid snapshot format parameter");
5448         } elsif (!exists($known_snapshot_formats{$format})) {
5449                 die_error(400, "Unknown snapshot format");
5450         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5451                 die_error(403, "Snapshot format not allowed");
5452         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5453                 die_error(403, "Unsupported snapshot format");
5454         }
5455
5456         my $type = git_get_type("$hash^{}");
5457         if (!$type) {
5458                 die_error(404, 'Object does not exist');
5459         }  elsif ($type eq 'blob') {
5460                 die_error(400, 'Object is not a tree-ish');
5461         }
5462
5463         my ($name, $prefix) = snapshot_name($project, $hash);
5464         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5465         my $cmd = quote_command(
5466                 git_cmd(), 'archive',
5467                 "--format=$known_snapshot_formats{$format}{'format'}",
5468                 "--prefix=$prefix/", $hash);
5469         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5470                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5471         }
5472
5473         $filename =~ s/(["\\])/\\$1/g;
5474         print $cgi->header(
5475                 -type => $known_snapshot_formats{$format}{'type'},
5476                 -content_disposition => 'inline; filename="' . $filename . '"',
5477                 -status => '200 OK');
5478
5479         open my $fd, "-|", $cmd
5480                 or die_error(500, "Execute git-archive failed");
5481         binmode STDOUT, ':raw';
5482         print <$fd>;
5483         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5484         close $fd;
5485 }
5486
5487 sub git_log {
5488         my $head = git_get_head_hash($project);
5489         if (!defined $hash) {
5490                 $hash = $head;
5491         }
5492         if (!defined $page) {
5493                 $page = 0;
5494         }
5495         my $refs = git_get_references();
5496
5497         my @commitlist = parse_commits($hash, 101, (100 * $page));
5498
5499         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5500
5501         my ($patch_max) = gitweb_get_feature('patches');
5502         if ($patch_max) {
5503                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5504                         $paging_nav .= " &sdot; " .
5505                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5506                                         "patches");
5507                 }
5508         }
5509
5510         git_header_html();
5511         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5512
5513         if (!@commitlist) {
5514                 my %co = parse_commit($hash);
5515
5516                 git_print_header_div('summary', $project);
5517                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5518         }
5519         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5520         for (my $i = 0; $i <= $to; $i++) {
5521                 my %co = %{$commitlist[$i]};
5522                 next if !%co;
5523                 my $commit = $co{'id'};
5524                 my $ref = format_ref_marker($refs, $commit);
5525                 my %ad = parse_date($co{'author_epoch'});
5526                 git_print_header_div('commit',
5527                                "<span class=\"age\">$co{'age_string'}</span>" .
5528                                esc_html($co{'title'}) . $ref,
5529                                $commit);
5530                 print "<div class=\"title_text\">\n" .
5531                       "<div class=\"log_link\">\n" .
5532                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5533                       " | " .
5534                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5535                       " | " .
5536                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5537                       "<br/>\n" .
5538                       "</div>\n";
5539                       git_print_authorship(\%co, -tag => 'span');
5540                       print "<br/>\n</div>\n";
5541
5542                 print "<div class=\"log_body\">\n";
5543                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5544                 print "</div>\n";
5545         }
5546         if ($#commitlist >= 100) {
5547                 print "<div class=\"page_nav\">\n";
5548                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5549                                -accesskey => "n", -title => "Alt-n"}, "next");
5550                 print "</div>\n";
5551         }
5552         git_footer_html();
5553 }
5554
5555 sub git_commit {
5556         $hash ||= $hash_base || "HEAD";
5557         my %co = parse_commit($hash)
5558             or die_error(404, "Unknown commit object");
5559
5560         my $parent  = $co{'parent'};
5561         my $parents = $co{'parents'}; # listref
5562
5563         # we need to prepare $formats_nav before any parameter munging
5564         my $formats_nav;
5565         if (!defined $parent) {
5566                 # --root commitdiff
5567                 $formats_nav .= '(initial)';
5568         } elsif (@$parents == 1) {
5569                 # single parent commit
5570                 $formats_nav .=
5571                         '(parent: ' .
5572                         $cgi->a({-href => href(action=>"commit",
5573                                                hash=>$parent)},
5574                                 esc_html(substr($parent, 0, 7))) .
5575                         ')';
5576         } else {
5577                 # merge commit
5578                 $formats_nav .=
5579                         '(merge: ' .
5580                         join(' ', map {
5581                                 $cgi->a({-href => href(action=>"commit",
5582                                                        hash=>$_)},
5583                                         esc_html(substr($_, 0, 7)));
5584                         } @$parents ) .
5585                         ')';
5586         }
5587         if (gitweb_check_feature('patches') && @$parents <= 1) {
5588                 $formats_nav .= " | " .
5589                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5590                                 "patch");
5591         }
5592
5593         if (!defined $parent) {
5594                 $parent = "--root";
5595         }
5596         my @difftree;
5597         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5598                 @diff_opts,
5599                 (@$parents <= 1 ? $parent : '-c'),
5600                 $hash, "--"
5601                 or die_error(500, "Open git-diff-tree failed");
5602         @difftree = map { chomp; $_ } <$fd>;
5603         close $fd or die_error(404, "Reading git-diff-tree failed");
5604
5605         # non-textual hash id's can be cached
5606         my $expires;
5607         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5608                 $expires = "+1d";
5609         }
5610         my $refs = git_get_references();
5611         my $ref = format_ref_marker($refs, $co{'id'});
5612
5613         git_header_html(undef, $expires);
5614         git_print_page_nav('commit', '',
5615                            $hash, $co{'tree'}, $hash,
5616                            $formats_nav);
5617
5618         if (defined $co{'parent'}) {
5619                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5620         } else {
5621                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5622         }
5623         print "<div class=\"title_text\">\n" .
5624               "<table class=\"object_header\">\n";
5625         git_print_authorship_rows(\%co);
5626         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5627         print "<tr>" .
5628               "<td>tree</td>" .
5629               "<td class=\"sha1\">" .
5630               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5631                        class => "list"}, $co{'tree'}) .
5632               "</td>" .
5633               "<td class=\"link\">" .
5634               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5635                       "tree");
5636         my $snapshot_links = format_snapshot_links($hash);
5637         if (defined $snapshot_links) {
5638                 print " | " . $snapshot_links;
5639         }
5640         print "</td>" .
5641               "</tr>\n";
5642
5643         foreach my $par (@$parents) {
5644                 print "<tr>" .
5645                       "<td>parent</td>" .
5646                       "<td class=\"sha1\">" .
5647                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5648                                class => "list"}, $par) .
5649                       "</td>" .
5650                       "<td class=\"link\">" .
5651                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5652                       " | " .
5653                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5654                       "</td>" .
5655                       "</tr>\n";
5656         }
5657         print "</table>".
5658               "</div>\n";
5659
5660         print "<div class=\"page_body\">\n";
5661         git_print_log($co{'comment'});
5662         print "</div>\n";
5663
5664         git_difftree_body(\@difftree, $hash, @$parents);
5665
5666         git_footer_html();
5667 }
5668
5669 sub git_object {
5670         # object is defined by:
5671         # - hash or hash_base alone
5672         # - hash_base and file_name
5673         my $type;
5674
5675         # - hash or hash_base alone
5676         if ($hash || ($hash_base && !defined $file_name)) {
5677                 my $object_id = $hash || $hash_base;
5678
5679                 open my $fd, "-|", quote_command(
5680                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5681                         or die_error(404, "Object does not exist");
5682                 $type = <$fd>;
5683                 chomp $type;
5684                 close $fd
5685                         or die_error(404, "Object does not exist");
5686
5687         # - hash_base and file_name
5688         } elsif ($hash_base && defined $file_name) {
5689                 $file_name =~ s,/+$,,;
5690
5691                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5692                         or die_error(404, "Base object does not exist");
5693
5694                 # here errors should not hapen
5695                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5696                         or die_error(500, "Open git-ls-tree failed");
5697                 my $line = <$fd>;
5698                 close $fd;
5699
5700                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5701                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5702                         die_error(404, "File or directory for given base does not exist");
5703                 }
5704                 $type = $2;
5705                 $hash = $3;
5706         } else {
5707                 die_error(400, "Not enough information to find object");
5708         }
5709
5710         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5711                                           hash=>$hash, hash_base=>$hash_base,
5712                                           file_name=>$file_name),
5713                              -status => '302 Found');
5714 }
5715
5716 sub git_blobdiff {
5717         my $format = shift || 'html';
5718
5719         my $fd;
5720         my @difftree;
5721         my %diffinfo;
5722         my $expires;
5723
5724         # preparing $fd and %diffinfo for git_patchset_body
5725         # new style URI
5726         if (defined $hash_base && defined $hash_parent_base) {
5727                 if (defined $file_name) {
5728                         # read raw output
5729                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5730                                 $hash_parent_base, $hash_base,
5731                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5732                                 or die_error(500, "Open git-diff-tree failed");
5733                         @difftree = map { chomp; $_ } <$fd>;
5734                         close $fd
5735                                 or die_error(404, "Reading git-diff-tree failed");
5736                         @difftree
5737                                 or die_error(404, "Blob diff not found");
5738
5739                 } elsif (defined $hash &&
5740                          $hash =~ /[0-9a-fA-F]{40}/) {
5741                         # try to find filename from $hash
5742
5743                         # read filtered raw output
5744                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5745                                 $hash_parent_base, $hash_base, "--"
5746                                 or die_error(500, "Open git-diff-tree failed");
5747                         @difftree =
5748                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5749                                 # $hash == to_id
5750                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5751                                 map { chomp; $_ } <$fd>;
5752                         close $fd
5753                                 or die_error(404, "Reading git-diff-tree failed");
5754                         @difftree
5755                                 or die_error(404, "Blob diff not found");
5756
5757                 } else {
5758                         die_error(400, "Missing one of the blob diff parameters");
5759                 }
5760
5761                 if (@difftree > 1) {
5762                         die_error(400, "Ambiguous blob diff specification");
5763                 }
5764
5765                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5766                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5767                 $file_name   ||= $diffinfo{'to_file'};
5768
5769                 $hash_parent ||= $diffinfo{'from_id'};
5770                 $hash        ||= $diffinfo{'to_id'};
5771
5772                 # non-textual hash id's can be cached
5773                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5774                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5775                         $expires = '+1d';
5776                 }
5777
5778                 # open patch output
5779                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5780                         '-p', ($format eq 'html' ? "--full-index" : ()),
5781                         $hash_parent_base, $hash_base,
5782                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5783                         or die_error(500, "Open git-diff-tree failed");
5784         }
5785
5786         # old/legacy style URI -- not generated anymore since 1.4.3.
5787         if (!%diffinfo) {
5788                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5789         }
5790
5791         # header
5792         if ($format eq 'html') {
5793                 my $formats_nav =
5794                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5795                                 "raw");
5796                 git_header_html(undef, $expires);
5797                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5798                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5799                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5800                 } else {
5801                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5802                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5803                 }
5804                 if (defined $file_name) {
5805                         git_print_page_path($file_name, "blob", $hash_base);
5806                 } else {
5807                         print "<div class=\"page_path\"></div>\n";
5808                 }
5809
5810         } elsif ($format eq 'plain') {
5811                 print $cgi->header(
5812                         -type => 'text/plain',
5813                         -charset => 'utf-8',
5814                         -expires => $expires,
5815                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5816
5817                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5818
5819         } else {
5820                 die_error(400, "Unknown blobdiff format");
5821         }
5822
5823         # patch
5824         if ($format eq 'html') {
5825                 print "<div class=\"page_body\">\n";
5826
5827                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5828                 close $fd;
5829
5830                 print "</div>\n"; # class="page_body"
5831                 git_footer_html();
5832
5833         } else {
5834                 while (my $line = <$fd>) {
5835                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5836                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5837
5838                         print $line;
5839
5840                         last if $line =~ m!^\+\+\+!;
5841                 }
5842                 local $/ = undef;
5843                 print <$fd>;
5844                 close $fd;
5845         }
5846 }
5847
5848 sub git_blobdiff_plain {
5849         git_blobdiff('plain');
5850 }
5851
5852 sub git_commitdiff {
5853         my %params = @_;
5854         my $format = $params{-format} || 'html';
5855
5856         my ($patch_max) = gitweb_get_feature('patches');
5857         if ($format eq 'patch') {
5858                 die_error(403, "Patch view not allowed") unless $patch_max;
5859         }
5860
5861         $hash ||= $hash_base || "HEAD";
5862         my %co = parse_commit($hash)
5863             or die_error(404, "Unknown commit object");
5864
5865         # choose format for commitdiff for merge
5866         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5867                 $hash_parent = '--cc';
5868         }
5869         # we need to prepare $formats_nav before almost any parameter munging
5870         my $formats_nav;
5871         if ($format eq 'html') {
5872                 $formats_nav =
5873                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5874                                 "raw");
5875                 if ($patch_max && @{$co{'parents'}} <= 1) {
5876                         $formats_nav .= " | " .
5877                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5878                                         "patch");
5879                 }
5880
5881                 if (defined $hash_parent &&
5882                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5883                         # commitdiff with two commits given
5884                         my $hash_parent_short = $hash_parent;
5885                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5886                                 $hash_parent_short = substr($hash_parent, 0, 7);
5887                         }
5888                         $formats_nav .=
5889                                 ' (from';
5890                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5891                                 if ($co{'parents'}[$i] eq $hash_parent) {
5892                                         $formats_nav .= ' parent ' . ($i+1);
5893                                         last;
5894                                 }
5895                         }
5896                         $formats_nav .= ': ' .
5897                                 $cgi->a({-href => href(action=>"commitdiff",
5898                                                        hash=>$hash_parent)},
5899                                         esc_html($hash_parent_short)) .
5900                                 ')';
5901                 } elsif (!$co{'parent'}) {
5902                         # --root commitdiff
5903                         $formats_nav .= ' (initial)';
5904                 } elsif (scalar @{$co{'parents'}} == 1) {
5905                         # single parent commit
5906                         $formats_nav .=
5907                                 ' (parent: ' .
5908                                 $cgi->a({-href => href(action=>"commitdiff",
5909                                                        hash=>$co{'parent'})},
5910                                         esc_html(substr($co{'parent'}, 0, 7))) .
5911                                 ')';
5912                 } else {
5913                         # merge commit
5914                         if ($hash_parent eq '--cc') {
5915                                 $formats_nav .= ' | ' .
5916                                         $cgi->a({-href => href(action=>"commitdiff",
5917                                                                hash=>$hash, hash_parent=>'-c')},
5918                                                 'combined');
5919                         } else { # $hash_parent eq '-c'
5920                                 $formats_nav .= ' | ' .
5921                                         $cgi->a({-href => href(action=>"commitdiff",
5922                                                                hash=>$hash, hash_parent=>'--cc')},
5923                                                 'compact');
5924                         }
5925                         $formats_nav .=
5926                                 ' (merge: ' .
5927                                 join(' ', map {
5928                                         $cgi->a({-href => href(action=>"commitdiff",
5929                                                                hash=>$_)},
5930                                                 esc_html(substr($_, 0, 7)));
5931                                 } @{$co{'parents'}} ) .
5932                                 ')';
5933                 }
5934         }
5935
5936         my $hash_parent_param = $hash_parent;
5937         if (!defined $hash_parent_param) {
5938                 # --cc for multiple parents, --root for parentless
5939                 $hash_parent_param =
5940                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5941         }
5942
5943         # read commitdiff
5944         my $fd;
5945         my @difftree;
5946         if ($format eq 'html') {
5947                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5948                         "--no-commit-id", "--patch-with-raw", "--full-index",
5949                         $hash_parent_param, $hash, "--"
5950                         or die_error(500, "Open git-diff-tree failed");
5951
5952                 while (my $line = <$fd>) {
5953                         chomp $line;
5954                         # empty line ends raw part of diff-tree output
5955                         last unless $line;
5956                         push @difftree, scalar parse_difftree_raw_line($line);
5957                 }
5958
5959         } elsif ($format eq 'plain') {
5960                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5961                         '-p', $hash_parent_param, $hash, "--"
5962                         or die_error(500, "Open git-diff-tree failed");
5963         } elsif ($format eq 'patch') {
5964                 # For commit ranges, we limit the output to the number of
5965                 # patches specified in the 'patches' feature.
5966                 # For single commits, we limit the output to a single patch,
5967                 # diverging from the git-format-patch default.
5968                 my @commit_spec = ();
5969                 if ($hash_parent) {
5970                         if ($patch_max > 0) {
5971                                 push @commit_spec, "-$patch_max";
5972                         }
5973                         push @commit_spec, '-n', "$hash_parent..$hash";
5974                 } else {
5975                         if ($params{-single}) {
5976                                 push @commit_spec, '-1';
5977                         } else {
5978                                 if ($patch_max > 0) {
5979                                         push @commit_spec, "-$patch_max";
5980                                 }
5981                                 push @commit_spec, "-n";
5982                         }
5983                         push @commit_spec, '--root', $hash;
5984                 }
5985                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5986                         '--stdout', @commit_spec
5987                         or die_error(500, "Open git-format-patch failed");
5988         } else {
5989                 die_error(400, "Unknown commitdiff format");
5990         }
5991
5992         # non-textual hash id's can be cached
5993         my $expires;
5994         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5995                 $expires = "+1d";
5996         }
5997
5998         # write commit message
5999         if ($format eq 'html') {
6000                 my $refs = git_get_references();
6001                 my $ref = format_ref_marker($refs, $co{'id'});
6002
6003                 git_header_html(undef, $expires);
6004                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6005                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6006                 print "<div class=\"title_text\">\n" .
6007                       "<table class=\"object_header\">\n";
6008                 git_print_authorship_rows(\%co);
6009                 print "</table>".
6010                       "</div>\n";
6011                 print "<div class=\"page_body\">\n";
6012                 if (@{$co{'comment'}} > 1) {
6013                         print "<div class=\"log\">\n";
6014                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6015                         print "</div>\n"; # class="log"
6016                 }
6017
6018         } elsif ($format eq 'plain') {
6019                 my $refs = git_get_references("tags");
6020                 my $tagname = git_get_rev_name_tags($hash);
6021                 my $filename = basename($project) . "-$hash.patch";
6022
6023                 print $cgi->header(
6024                         -type => 'text/plain',
6025                         -charset => 'utf-8',
6026                         -expires => $expires,
6027                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6028                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6029                 print "From: " . to_utf8($co{'author'}) . "\n";
6030                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6031                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6032
6033                 print "X-Git-Tag: $tagname\n" if $tagname;
6034                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6035
6036                 foreach my $line (@{$co{'comment'}}) {
6037                         print to_utf8($line) . "\n";
6038                 }
6039                 print "---\n\n";
6040         } elsif ($format eq 'patch') {
6041                 my $filename = basename($project) . "-$hash.patch";
6042
6043                 print $cgi->header(
6044                         -type => 'text/plain',
6045                         -charset => 'utf-8',
6046                         -expires => $expires,
6047                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6048         }
6049
6050         # write patch
6051         if ($format eq 'html') {
6052                 my $use_parents = !defined $hash_parent ||
6053                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6054                 git_difftree_body(\@difftree, $hash,
6055                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6056                 print "<br/>\n";
6057
6058                 git_patchset_body($fd, \@difftree, $hash,
6059                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6060                 close $fd;
6061                 print "</div>\n"; # class="page_body"
6062                 git_footer_html();
6063
6064         } elsif ($format eq 'plain') {
6065                 local $/ = undef;
6066                 print <$fd>;
6067                 close $fd
6068                         or print "Reading git-diff-tree failed\n";
6069         } elsif ($format eq 'patch') {
6070                 local $/ = undef;
6071                 print <$fd>;
6072                 close $fd
6073                         or print "Reading git-format-patch failed\n";
6074         }
6075 }
6076
6077 sub git_commitdiff_plain {
6078         git_commitdiff(-format => 'plain');
6079 }
6080
6081 # format-patch-style patches
6082 sub git_patch {
6083         git_commitdiff(-format => 'patch', -single => 1);
6084 }
6085
6086 sub git_patches {
6087         git_commitdiff(-format => 'patch');
6088 }
6089
6090 sub git_history {
6091         if (!defined $hash_base) {
6092                 $hash_base = git_get_head_hash($project);
6093         }
6094         if (!defined $page) {
6095                 $page = 0;
6096         }
6097         my $ftype;
6098         my %co = parse_commit($hash_base)
6099             or die_error(404, "Unknown commit object");
6100
6101         my $refs = git_get_references();
6102         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
6103
6104         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
6105                                        $file_name, "--full-history")
6106             or die_error(404, "No such file or directory on given branch");
6107
6108         if (!defined $hash && defined $file_name) {
6109                 # some commits could have deleted file in question,
6110                 # and not have it in tree, but one of them has to have it
6111                 for (my $i = 0; $i <= @commitlist; $i++) {
6112                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6113                         last if defined $hash;
6114                 }
6115         }
6116         if (defined $hash) {
6117                 $ftype = git_get_type($hash);
6118         }
6119         if (!defined $ftype) {
6120                 die_error(500, "Unknown type of object");
6121         }
6122
6123         my $paging_nav = '';
6124         if ($page > 0) {
6125                 $paging_nav .=
6126                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
6127                                                file_name=>$file_name)},
6128                                 "first");
6129                 $paging_nav .= " &sdot; " .
6130                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6131                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6132         } else {
6133                 $paging_nav .= "first";
6134                 $paging_nav .= " &sdot; prev";
6135         }
6136         my $next_link = '';
6137         if ($#commitlist >= 100) {
6138                 $next_link =
6139                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6140                                  -accesskey => "n", -title => "Alt-n"}, "next");
6141                 $paging_nav .= " &sdot; $next_link";
6142         } else {
6143                 $paging_nav .= " &sdot; next";
6144         }
6145
6146         git_header_html();
6147         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6148         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6149         git_print_page_path($file_name, $ftype, $hash_base);
6150
6151         git_history_body(\@commitlist, 0, 99,
6152                          $refs, $hash_base, $ftype, $next_link);
6153
6154         git_footer_html();
6155 }
6156
6157 sub git_search {
6158         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6159         if (!defined $searchtext) {
6160                 die_error(400, "Text field is empty");
6161         }
6162         if (!defined $hash) {
6163                 $hash = git_get_head_hash($project);
6164         }
6165         my %co = parse_commit($hash);
6166         if (!%co) {
6167                 die_error(404, "Unknown commit object");
6168         }
6169         if (!defined $page) {
6170                 $page = 0;
6171         }
6172
6173         $searchtype ||= 'commit';
6174         if ($searchtype eq 'pickaxe') {
6175                 # pickaxe may take all resources of your box and run for several minutes
6176                 # with every query - so decide by yourself how public you make this feature
6177                 gitweb_check_feature('pickaxe')
6178                     or die_error(403, "Pickaxe is disabled");
6179         }
6180         if ($searchtype eq 'grep') {
6181                 gitweb_check_feature('grep')[0]
6182                     or die_error(403, "Grep is disabled");
6183         }
6184
6185         git_header_html();
6186
6187         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6188                 my $greptype;
6189                 if ($searchtype eq 'commit') {
6190                         $greptype = "--grep=";
6191                 } elsif ($searchtype eq 'author') {
6192                         $greptype = "--author=";
6193                 } elsif ($searchtype eq 'committer') {
6194                         $greptype = "--committer=";
6195                 }
6196                 $greptype .= $searchtext;
6197                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6198                                                $greptype, '--regexp-ignore-case',
6199                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6200
6201                 my $paging_nav = '';
6202                 if ($page > 0) {
6203                         $paging_nav .=
6204                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6205                                                        searchtext=>$searchtext,
6206                                                        searchtype=>$searchtype)},
6207                                         "first");
6208                         $paging_nav .= " &sdot; " .
6209                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6210                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6211                 } else {
6212                         $paging_nav .= "first";
6213                         $paging_nav .= " &sdot; prev";
6214                 }
6215                 my $next_link = '';
6216                 if ($#commitlist >= 100) {
6217                         $next_link =
6218                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6219                                          -accesskey => "n", -title => "Alt-n"}, "next");
6220                         $paging_nav .= " &sdot; $next_link";
6221                 } else {
6222                         $paging_nav .= " &sdot; next";
6223                 }
6224
6225                 if ($#commitlist >= 100) {
6226                 }
6227
6228                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6229                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6230                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6231         }
6232
6233         if ($searchtype eq 'pickaxe') {
6234                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6235                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6236
6237                 print "<table class=\"pickaxe search\">\n";
6238                 my $alternate = 1;
6239                 local $/ = "\n";
6240                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6241                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6242                         ($search_use_regexp ? '--pickaxe-regex' : ());
6243                 undef %co;
6244                 my @files;
6245                 while (my $line = <$fd>) {
6246                         chomp $line;
6247                         next unless $line;
6248
6249                         my %set = parse_difftree_raw_line($line);
6250                         if (defined $set{'commit'}) {
6251                                 # finish previous commit
6252                                 if (%co) {
6253                                         print "</td>\n" .
6254                                               "<td class=\"link\">" .
6255                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6256                                               " | " .
6257                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6258                                         print "</td>\n" .
6259                                               "</tr>\n";
6260                                 }
6261
6262                                 if ($alternate) {
6263                                         print "<tr class=\"dark\">\n";
6264                                 } else {
6265                                         print "<tr class=\"light\">\n";
6266                                 }
6267                                 $alternate ^= 1;
6268                                 %co = parse_commit($set{'commit'});
6269                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6270                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6271                                       "<td><i>$author</i></td>\n" .
6272                                       "<td>" .
6273                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6274                                               -class => "list subject"},
6275                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6276                         } elsif (defined $set{'to_id'}) {
6277                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6278
6279                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6280                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6281                                               -class => "list"},
6282                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6283                                       "<br/>\n";
6284                         }
6285                 }
6286                 close $fd;
6287
6288                 # finish last commit (warning: repetition!)
6289                 if (%co) {
6290                         print "</td>\n" .
6291                               "<td class=\"link\">" .
6292                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6293                               " | " .
6294                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6295                         print "</td>\n" .
6296                               "</tr>\n";
6297                 }
6298
6299                 print "</table>\n";
6300         }
6301
6302         if ($searchtype eq 'grep') {
6303                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6304                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6305
6306                 print "<table class=\"grep_search\">\n";
6307                 my $alternate = 1;
6308                 my $matches = 0;
6309                 local $/ = "\n";
6310                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6311                         $search_use_regexp ? ('-E', '-i') : '-F',
6312                         $searchtext, $co{'tree'};
6313                 my $lastfile = '';
6314                 while (my $line = <$fd>) {
6315                         chomp $line;
6316                         my ($file, $lno, $ltext, $binary);
6317                         last if ($matches++ > 1000);
6318                         if ($line =~ /^Binary file (.+) matches$/) {
6319                                 $file = $1;
6320                                 $binary = 1;
6321                         } else {
6322                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6323                         }
6324                         if ($file ne $lastfile) {
6325                                 $lastfile and print "</td></tr>\n";
6326                                 if ($alternate++) {
6327                                         print "<tr class=\"dark\">\n";
6328                                 } else {
6329                                         print "<tr class=\"light\">\n";
6330                                 }
6331                                 print "<td class=\"list\">".
6332                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6333                                                                file_name=>"$file"),
6334                                                 -class => "list"}, esc_path($file));
6335                                 print "</td><td>\n";
6336                                 $lastfile = $file;
6337                         }
6338                         if ($binary) {
6339                                 print "<div class=\"binary\">Binary file</div>\n";
6340                         } else {
6341                                 $ltext = untabify($ltext);
6342                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6343                                         $ltext = esc_html($1, -nbsp=>1);
6344                                         $ltext .= '<span class="match">';
6345                                         $ltext .= esc_html($2, -nbsp=>1);
6346                                         $ltext .= '</span>';
6347                                         $ltext .= esc_html($3, -nbsp=>1);
6348                                 } else {
6349                                         $ltext = esc_html($ltext, -nbsp=>1);
6350                                 }
6351                                 print "<div class=\"pre\">" .
6352                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6353                                                                file_name=>"$file").'#l'.$lno,
6354                                                 -class => "linenr"}, sprintf('%4i', $lno))
6355                                         . ' ' .  $ltext . "</div>\n";
6356                         }
6357                 }
6358                 if ($lastfile) {
6359                         print "</td></tr>\n";
6360                         if ($matches > 1000) {
6361                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6362                         }
6363                 } else {
6364                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6365                 }
6366                 close $fd;
6367
6368                 print "</table>\n";
6369         }
6370         git_footer_html();
6371 }
6372
6373 sub git_search_help {
6374         git_header_html();
6375         git_print_page_nav('','', $hash,$hash,$hash);
6376         print <<EOT;
6377 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6378 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6379 the pattern entered is recognized as the POSIX extended
6380 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6381 insensitive).</p>
6382 <dl>
6383 <dt><b>commit</b></dt>
6384 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6385 EOT
6386         my $have_grep = gitweb_check_feature('grep');
6387         if ($have_grep) {
6388                 print <<EOT;
6389 <dt><b>grep</b></dt>
6390 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6391     a different one) are searched for the given pattern. On large trees, this search can take
6392 a while and put some strain on the server, so please use it with some consideration. Note that
6393 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6394 case-sensitive.</dd>
6395 EOT
6396         }
6397         print <<EOT;
6398 <dt><b>author</b></dt>
6399 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6400 <dt><b>committer</b></dt>
6401 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6402 EOT
6403         my $have_pickaxe = gitweb_check_feature('pickaxe');
6404         if ($have_pickaxe) {
6405                 print <<EOT;
6406 <dt><b>pickaxe</b></dt>
6407 <dd>All commits that caused the string to appear or disappear from any file (changes that
6408 added, removed or "modified" the string) will be listed. This search can take a while and
6409 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6410 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6411 EOT
6412         }
6413         print "</dl>\n";
6414         git_footer_html();
6415 }
6416
6417 sub git_shortlog {
6418         my $head = git_get_head_hash($project);
6419         if (!defined $hash) {
6420                 $hash = $head;
6421         }
6422         if (!defined $page) {
6423                 $page = 0;
6424         }
6425         my $refs = git_get_references();
6426
6427         my $commit_hash = $hash;
6428         if (defined $hash_parent) {
6429                 $commit_hash = "$hash_parent..$hash";
6430         }
6431         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6432
6433         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6434         my $next_link = '';
6435         if ($#commitlist >= 100) {
6436                 $next_link =
6437                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6438                                  -accesskey => "n", -title => "Alt-n"}, "next");
6439         }
6440         my $patch_max = gitweb_check_feature('patches');
6441         if ($patch_max) {
6442                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6443                         $paging_nav .= " &sdot; " .
6444                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6445                                         "patches");
6446                 }
6447         }
6448
6449         git_header_html();
6450         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6451         git_print_header_div('summary', $project);
6452
6453         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6454
6455         git_footer_html();
6456 }
6457
6458 ## ......................................................................
6459 ## feeds (RSS, Atom; OPML)
6460
6461 sub git_feed {
6462         my $format = shift || 'atom';
6463         my $have_blame = gitweb_check_feature('blame');
6464
6465         # Atom: http://www.atomenabled.org/developers/syndication/
6466         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6467         if ($format ne 'rss' && $format ne 'atom') {
6468                 die_error(400, "Unknown web feed format");
6469         }
6470
6471         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6472         my $head = $hash || 'HEAD';
6473         my @commitlist = parse_commits($head, 150, 0, $file_name);
6474
6475         my %latest_commit;
6476         my %latest_date;
6477         my $content_type = "application/$format+xml";
6478         if (defined $cgi->http('HTTP_ACCEPT') &&
6479                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6480                 # browser (feed reader) prefers text/xml
6481                 $content_type = 'text/xml';
6482         }
6483         if (defined($commitlist[0])) {
6484                 %latest_commit = %{$commitlist[0]};
6485                 my $latest_epoch = $latest_commit{'committer_epoch'};
6486                 %latest_date   = parse_date($latest_epoch);
6487                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6488                 if (defined $if_modified) {
6489                         my $since;
6490                         if (eval { require HTTP::Date; 1; }) {
6491                                 $since = HTTP::Date::str2time($if_modified);
6492                         } elsif (eval { require Time::ParseDate; 1; }) {
6493                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6494                         }
6495                         if (defined $since && $latest_epoch <= $since) {
6496                                 print $cgi->header(
6497                                         -type => $content_type,
6498                                         -charset => 'utf-8',
6499                                         -last_modified => $latest_date{'rfc2822'},
6500                                         -status => '304 Not Modified');
6501                                 return;
6502                         }
6503                 }
6504                 print $cgi->header(
6505                         -type => $content_type,
6506                         -charset => 'utf-8',
6507                         -last_modified => $latest_date{'rfc2822'});
6508         } else {
6509                 print $cgi->header(
6510                         -type => $content_type,
6511                         -charset => 'utf-8');
6512         }
6513
6514         # Optimization: skip generating the body if client asks only
6515         # for Last-Modified date.
6516         return if ($cgi->request_method() eq 'HEAD');
6517
6518         # header variables
6519         my $title = "$site_name - $project/$action";
6520         my $feed_type = 'log';
6521         if (defined $hash) {
6522                 $title .= " - '$hash'";
6523                 $feed_type = 'branch log';
6524                 if (defined $file_name) {
6525                         $title .= " :: $file_name";
6526                         $feed_type = 'history';
6527                 }
6528         } elsif (defined $file_name) {
6529                 $title .= " - $file_name";
6530                 $feed_type = 'history';
6531         }
6532         $title .= " $feed_type";
6533         my $descr = git_get_project_description($project);
6534         if (defined $descr) {
6535                 $descr = esc_html($descr);
6536         } else {
6537                 $descr = "$project " .
6538                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6539                          " feed";
6540         }
6541         my $owner = git_get_project_owner($project);
6542         $owner = esc_html($owner);
6543
6544         #header
6545         my $alt_url;
6546         if (defined $file_name) {
6547                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6548         } elsif (defined $hash) {
6549                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6550         } else {
6551                 $alt_url = href(-full=>1, action=>"summary");
6552         }
6553         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6554         if ($format eq 'rss') {
6555                 print <<XML;
6556 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6557 <channel>
6558 XML
6559                 print "<title>$title</title>\n" .
6560                       "<link>$alt_url</link>\n" .
6561                       "<description>$descr</description>\n" .
6562                       "<language>en</language>\n" .
6563                       # project owner is responsible for 'editorial' content
6564                       "<managingEditor>$owner</managingEditor>\n";
6565                 if (defined $logo || defined $favicon) {
6566                         # prefer the logo to the favicon, since RSS
6567                         # doesn't allow both
6568                         my $img = esc_url($logo || $favicon);
6569                         print "<image>\n" .
6570                               "<url>$img</url>\n" .
6571                               "<title>$title</title>\n" .
6572                               "<link>$alt_url</link>\n" .
6573                               "</image>\n";
6574                 }
6575                 if (%latest_date) {
6576                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6577                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6578                 }
6579                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6580         } elsif ($format eq 'atom') {
6581                 print <<XML;
6582 <feed xmlns="http://www.w3.org/2005/Atom">
6583 XML
6584                 print "<title>$title</title>\n" .
6585                       "<subtitle>$descr</subtitle>\n" .
6586                       '<link rel="alternate" type="text/html" href="' .
6587                       $alt_url . '" />' . "\n" .
6588                       '<link rel="self" type="' . $content_type . '" href="' .
6589                       $cgi->self_url() . '" />' . "\n" .
6590                       "<id>" . href(-full=>1) . "</id>\n" .
6591                       # use project owner for feed author
6592                       "<author><name>$owner</name></author>\n";
6593                 if (defined $favicon) {
6594                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6595                 }
6596                 if (defined $logo_url) {
6597                         # not twice as wide as tall: 72 x 27 pixels
6598                         print "<logo>" . esc_url($logo) . "</logo>\n";
6599                 }
6600                 if (! %latest_date) {
6601                         # dummy date to keep the feed valid until commits trickle in:
6602                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6603                 } else {
6604                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6605                 }
6606                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6607         }
6608
6609         # contents
6610         for (my $i = 0; $i <= $#commitlist; $i++) {
6611                 my %co = %{$commitlist[$i]};
6612                 my $commit = $co{'id'};
6613                 # we read 150, we always show 30 and the ones more recent than 48 hours
6614                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6615                         last;
6616                 }
6617                 my %cd = parse_date($co{'author_epoch'});
6618
6619                 # get list of changed files
6620                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6621                         $co{'parent'} || "--root",
6622                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6623                         or next;
6624                 my @difftree = map { chomp; $_ } <$fd>;
6625                 close $fd
6626                         or next;
6627
6628                 # print element (entry, item)
6629                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6630                 if ($format eq 'rss') {
6631                         print "<item>\n" .
6632                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6633                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6634                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6635                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6636                               "<link>$co_url</link>\n" .
6637                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6638                               "<content:encoded>" .
6639                               "<![CDATA[\n";
6640                 } elsif ($format eq 'atom') {
6641                         print "<entry>\n" .
6642                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6643                               "<updated>$cd{'iso-8601'}</updated>\n" .
6644                               "<author>\n" .
6645                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6646                         if ($co{'author_email'}) {
6647                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6648                         }
6649                         print "</author>\n" .
6650                               # use committer for contributor
6651                               "<contributor>\n" .
6652                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6653                         if ($co{'committer_email'}) {
6654                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6655                         }
6656                         print "</contributor>\n" .
6657                               "<published>$cd{'iso-8601'}</published>\n" .
6658                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6659                               "<id>$co_url</id>\n" .
6660                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6661                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6662                 }
6663                 my $comment = $co{'comment'};
6664                 print "<pre>\n";
6665                 foreach my $line (@$comment) {
6666                         $line = esc_html($line);
6667                         print "$line\n";
6668                 }
6669                 print "</pre><ul>\n";
6670                 foreach my $difftree_line (@difftree) {
6671                         my %difftree = parse_difftree_raw_line($difftree_line);
6672                         next if !$difftree{'from_id'};
6673
6674                         my $file = $difftree{'file'} || $difftree{'to_file'};
6675
6676                         print "<li>" .
6677                               "[" .
6678                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6679                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6680                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6681                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6682                                       -title => "diff"}, 'D');
6683                         if ($have_blame) {
6684                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6685                                                              file_name=>$file, hash_base=>$commit),
6686                                               -title => "blame"}, 'B');
6687                         }
6688                         # if this is not a feed of a file history
6689                         if (!defined $file_name || $file_name ne $file) {
6690                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6691                                                              file_name=>$file, hash=>$commit),
6692                                               -title => "history"}, 'H');
6693                         }
6694                         $file = esc_path($file);
6695                         print "] ".
6696                               "$file</li>\n";
6697                 }
6698                 if ($format eq 'rss') {
6699                         print "</ul>]]>\n" .
6700                               "</content:encoded>\n" .
6701                               "</item>\n";
6702                 } elsif ($format eq 'atom') {
6703                         print "</ul>\n</div>\n" .
6704                               "</content>\n" .
6705                               "</entry>\n";
6706                 }
6707         }
6708
6709         # end of feed
6710         if ($format eq 'rss') {
6711                 print "</channel>\n</rss>\n";
6712         } elsif ($format eq 'atom') {
6713                 print "</feed>\n";
6714         }
6715 }
6716
6717 sub git_rss {
6718         git_feed('rss');
6719 }
6720
6721 sub git_atom {
6722         git_feed('atom');
6723 }
6724
6725 sub git_opml {
6726         my @list = git_get_projects_list();
6727
6728         print $cgi->header(
6729                 -type => 'text/xml',
6730                 -charset => 'utf-8',
6731                 -content_disposition => 'inline; filename="opml.xml"');
6732
6733         print <<XML;
6734 <?xml version="1.0" encoding="utf-8"?>
6735 <opml version="1.0">
6736 <head>
6737   <title>$site_name OPML Export</title>
6738 </head>
6739 <body>
6740 <outline text="git RSS feeds">
6741 XML
6742
6743         foreach my $pr (@list) {
6744                 my %proj = %$pr;
6745                 my $head = git_get_head_hash($proj{'path'});
6746                 if (!defined $head) {
6747                         next;
6748                 }
6749                 $git_dir = "$projectroot/$proj{'path'}";
6750                 my %co = parse_commit($head);
6751                 if (!%co) {
6752                         next;
6753                 }
6754
6755                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6756                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6757                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6758                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6759         }
6760         print <<XML;
6761 </outline>
6762 </body>
6763 </opml>
6764 XML
6765 }